US2741194A - Operating mechanism for dumping door - Google Patents

Description

April 10, 1956 G. s. DOREY OPERATING MECHANISM FOR DUMPING DOOR 4 Sheets-Sheet 1 Original Filed Feb. 15. 1951 G60 BY sh MN April 10, 1956 s. B. DOREY OPERATING MECHANISM FOR DUMPING DOOR 4 Sheets-Sheet 2 Original Filed Feb. 1.5, 1951 2 I 6:5 IIIIIIIII. n

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United States PatentO OPERATING MECHANISM FOR DUMllNG DOOR George B. Dorey, Westmount, Quebec, Canada, assignor to Enterprise Railway Equipment Company, Chicago, 111., a corporation of Illinois Original application February 15, 1951, Serial No. 211,137. Divided and this application October 3, 1952, Serial No. 312,962

6 Claims. (Cl. 105301) The invention relates to an improved door operating mechanism for dump cars of the type having a door hinged at one end and supported adjacent the swinging edge by a door operating shaft having linkage connecting the shaft and door for supporting the door in open position and wherein the linkage is arranged to wind on the shaft and thereafter provide for the latter to move in supporting position beneath the door. This application is a division of application Serial No. 211,137, filed February 15, 1951.

The objects of the invention, among others, are: To provide for operating an individual door by means of a swingingly mounted shaft arranged to lift the door and move bodily beneath the door and to provide means at one end of the shaft for raising the door and other means at the opposite end of the shaft for releasing the door; to provide interlocking operating heads' and winding hubs for the operating mechanism; and to provide operating heads for the mechanism having essentials for safety and convenience.

In the drawings forming a part of this specification:

Figure 1 shows a vertical longitudinal elevation of a part of a railway car showing as much of the car as necessary to show one dumping door with the improved mechanism applied thereto;

Figure 2 is a vertical sectional view taken on a line 2--2 of Figure 1;

Figure 3 is a vertical sectional View somewhat similar to Figure 2 except that the door is illustrated in open position and is taken on a line 3-3 of Figure 1;

Figure 4 is a vertical sectional view similar to Figure 2 except that the shaft is shown as swung outwardly beyond the path of movement of the door and corresponds to a line 4-4 of Figure 1;

Figure 5 is a vertical sectional view taken through the outer end of the door on a line corresponding to a line 5-5 of Figure 1 illustrating the shaft locking mechanism and the door raising operating head;

Figure 6 is a vertical sectional view taken through the outer end of the door, similar to Figure 5 except that the locking pawl and dog are shown in released position;

Figure 7 is a vertical sectional View of the outer end of the door as seen on a line 7-7 of Figure 1 and illustrates the door releasing head;

Figure 8 is a detached longitudinal elevational view on an enlarged scale of the shaft operating head employed for rotating the shaft in a door lifting direction;

Figure 9 is a vertical end view of the operating head shown in Figure 8 as viewed from left to right;

Figure 10 is a detached longitudinal elevational view on an enlarged scale of one of the winding hubs;

Figure 11 is a vertical end view of the winding hub shown in Figure 10 as viewed from left to right;

Figure 12 is a detached longitudinal elevational View on an enlarged scale of the shaft operating head employed for initiating the release of the mechanism in a door opening direction; and

Figure 13 is a vertical end view of the operating head shown in Figure 12 as viewed from right to left.

The present embodiment of this invention is shown as applied to a drop bottom car of a form well known in the art, cars of said type generally including a plurality of doors hinged to each side of the longitudinal center of the car and opening to a downwardly inclined position to discharge lading to the sides of the car. in the drawings only one of such doors is indicated on one side of the center sill.

The car as shown is provided with a center sill indicated at 10 having a top plate 11, crossbeams 12 of the underframe, crossbeam top plates at 13, side stakes 14 extend ing upwardly from the ends of the crossbeams and side walls indicated in this instance by a lower side chord angle 15 and side plates 16. The angle 15 includes a lower horizontally disposed wall 17 which connects with the crossbeam top plates 13 and the adjacent Wall 13 of the angle extends upwardly and is secured to the side stakes 14 and side plates 16.

The side edges of the angle wall 17 in combination with the facing edges of the crossbearn top plates 13 and the adjacent edge of the center sill top plate 15 define the boundaries of a discharge opening 19.

Positioned to close the discharge opening 19 is a dumping door 29 which is disposed to underlie the respective plates defining the discharge opening. Said door 2% preferably includes a body plate portion 2%) reinforced along its front, rear and side edges by downwardly turned flanges indicated at 22, 23, and 24, respectively, and secured to the underside of the body are hinge beams 25 extending from the rear to the front edges and secured to said beams are hinge straps 26 which are each formed with an eye 27 to receive a hinge pivot 28 whereby thedoor is pivotally supported on hinge brackets 29, the latter being secured to the center sill 10.

The door 20 in its closed position is preferably horizontally disposed and is supported at its swinging edge by a shaft 39 having a square cross section which is rotatably supported in swinging hangers 31, the latter being pivotally mounted on pivots 32 carried by brackets 33 which in turn are secured to the car side walls. The brackets 33 include base wall 34 which receives attaching rivets 35 and extending outwardly from said base wall are vertically disposed spaced walls between which the swinging hangers 31 are disposed and form the support for the pivots 32.

The hanger supporting pivots 32 are mounted beyond the swinging edge of the door proper, as shown in Figure 2, and so positioned as to permit the hangers31 to gravitate to a vertical position with the axis 36 of the shaft 36 directly beneath the said pivot 32 whereby a straight line 37 extending through the axis 36 of the shaft and passing through the axis of the pivot 32 will lie on a substantially vertical line when the door is in closed position, as will be explained.

The door 20 adiacent its swinging edge is reinforced by an angle member 38 having one flange secured to the outer depending flange 22 of the door and the adjacent flange 39 extends forwardly beyond the flange 22. Disposed in the angle formed by the flange 22 and flange 39 of the front door beam 38 are extension brackets do which include a beam portion 41 projecting forwardly to lie above the shaft 30 when the latter is biased to its normally closed position.

Disposed in alignment with the beam portions 41 are hubs 42 non-rotatably mounted on the shaft 30 and extending between each of said hubs 42 and its related aligned door bracket is a flexible connection 43.

There are preferably two connections 43 to each door 20 but, inasmuch as the construction is the same in each .,.-3 instance,ihedescriptionand operation will be confined to one of said connections. The connection 43 is formed of a plurality of links movably united by means of rivets 44 and includes a pair of terminal end links 425- 45 which 7 straddle the projecting beamporti'on 41 and are'pivotally united therewithby means of a rivet'46. The opposite ends of the terminal links' -iS straddle links 48 and are pivotally united therewith at 49 and said link in turn lies between a pair of links tl 5il and is pivotally united therewith at 51. The opposite ends of the links 59 straddle link 52 and are pivotally united therewith at 53 and. said link 52 is extended within a pair of jaws 54-54 of the hub 42 and pivotally united therewith at 55.

The said links 45, 48, 5t and52 are arranged to wind around the hub 42 which is formedwith a-drum section of polygonal form to present a plurality of faces, as shown in Figure ll, corresponding to the number of links, said faces being indicated at56, 57, 58 and 59 respectively. The links are maintained in fixed radial relation to the axis of the shaft3t by means of positioning cog projections 6% and 61 which respectively extend within the double linkage 45 and 5d. The projecting beam portion 41 is formed with an arcuate shaped seat '62, Figure 3, which engages with a corresponding formed seating surface 63 formed on the hub 42 and said seats 62 and 63 are contoured to extend concent 'cally with respect to the axis 64 of the terminal links 45 of the linkage. The said seat 63 is extended to merge into the cog projection 66 thus provides for an extended area of bearing arc contact betweenthe seating surface of the'door bracket it} and hub 42 respectively.

The shaft 3% is preferably of non-circular or square section and in order to provide for its free rotation there is provided at each hanger 31 a member 65, Figures 8, 9,

7 l2 and 13, having a circular hub. portion 66 for extending within the related hanger 31. Extending lengthwise from said portion 66 is a pair of walls"6767 which project within the adjacent hub member 42 and'areunited therewith and with the shaft by a rivet 68. It will be observed in Figures 1, and 11.0f the drawings that each hub member 42 has laterally extending wall means 42 within or underneath which the respective wall 67 projects. Each rivet 68 then serves to hold a hub member 42 and a hub portion 66 together with the operating head in place on the respective end of the shaft 36).

The respective hub members 42 are preferably positioned intermediate the pair. of swinging hangers 31 and the shaft 39 is maintained against lengthwise displacement by the latter. Said members 65' outwardly of the supporting hangers 31 are each provided w'ithan operating head as indicated at 69 and 70, Figures 8 and 12, respectively, the head 69 being for the purpose of receiving an operating bar for lifting the door 2% by rotation of'the shaft 3i? and the head if; being for the purpose of releasing the door 2% to move to the open position. I

The head 69 is in the form of'a series of triangular shaped walls 71 arranged in spaced radial relation to accommodate a removable bar and each of said walls includes an edge 72 extending substantially parallel to the axis of rotation of the shaft 34} and the adjacent edge 73 is inclined relatively thereto. Rotation of the shaft 31? in a door lifting direction is effected by the use of a removable bar retained and gripped between two of the adjacent parallel edges 72 and retention of the bar to rotate the shaft in the opposite direction is presented by reason of the e of the edges 73 which operate as safety throw out surfaces to displace the bar in a sideways direction and thereby absolutely restrict the use of this head 69 to the door raising operation.

Intermediate each wall 71 the head 69 is'notched at 7d to provide a series of ratchet teeth 75 with which a pivoted locking pawl 76, Figured, cooperates to maintain the shaft '3 against reverse movement-inan-unwinding direction. The lockingpawl 76 is pivotally mounted on a lug 77 integrally formed with one of the hangers 31 and '4 cooperable with the pawl 76 is a locking dog78. pivotally mounted on an integrally formed lug 79 formed on the hanger 31. Overlying saidpawl 7 6 and dog 78 is a strap plate 8% securedin place by rivets 81 extending through the lugs 77 and 79.

The head 7t Figure 12, which is disposed on the end of the shaft 31) opposite to head 69 is formed with a single triangular shaped wall 82 having an edge portion 83 positioned, when the mechanism is in closed'position, below and outwardiy of the door 20 whereby an operating bar Figure 7, is received between the outer edge 85 of the door angle 38 and the said edge-33 of the operating head 7t to displace the 'shaft'39 outwardly.

The tip of the locking pawl 76 is formed with a lip'86, Figure 6, and cooperating therewith is a recess 87 in the locking dog 73 whereby the locking pawl 76 is held in an inoperative position during the door releasing operation as shown in Figure 5.

The operation of the mechanism is as follows: assuming the parts in locked position as shown in Figure 1, the locking pawl '76 is moved to the inoperative position and there retained by the locking dog '73 as shown in Figure 5. The operating bar M then is positioned between the edge 85 of the door angle 38 and the fulcrum edge 83 as shown in Figure 7. Upon outward movement of the free end of the operating bar $4, the shaft-3t is rotated and bodily moved outwardly to the position shown in Figure 4 after which the weight of the door 20 and lading moves it to fully opened position. During the initial unwinding operation of the shaft 3%, the cog projections 60 serve to maintain the linkages in definite radial'relation to the hub 42 and prevent fouling of the linkage should the lading and door be frozen as frequently occurs under extreme cold weather conditions.

The raising of the doors is a reverse of the releasing operation except that the locking pawl 76 is brought into engagement with the ratchet teeth and the operating head 69 is employed for receiving the operating bar 88 as shown in Figure 3.

The use of a separate head 7% for releasing the door 20 which is entirely independent of the door lifting head 69 is a simple expedient making for safety of operation inasmuch as said independent operation guards against accidents which might arise from the misuse of the door lifting mechanism to effect release of the door 20.

What is claimed as new is:

l. in a railway car having an opening, a discharge door for closing the opening, a rotatable shaft pivotally mounted adjacent the swinging edge of the door, swinging hangers pivotally mounted above the shaft for supporting the shaft, said shaft being bodily movable upon swinging motion of the hangers to move to a supporting position beneath the door, winding hubs rigidly mounted on the shaft and disposed between the hangers, and a flexible connection connected to the door and each hub and winding thereon, the improvement comprising operating heads rigidly mounted on the shaft outwardly of the hangers, one of said heads having a series of bar receiving fulcrums for accommodating a removable bar for rotating the shaft in a link winding direction, said fulcrums being formed with inclined surfaces arranged to disengage the removable bar from the head upon rotation of the shaft in a link unwinding direction, and a second operating head on the opposite end of the shaft having a fulcrum spaced rom the'edge of the door and so located as to receive a removable bar between the door and fulcrum for releasing the mechanism.

2. in a railway car having an opening and a swinging discharge door for closing tr e same, a shaft, means 511 porting said shaft along the swinging edge of said door for rotatable and translatory movement to underlie and support said door in closed position and to move from underneath said door to permit it to swing to open position, flexible means interconnecting said door and said shaft to lift the former on rotation of the latter, and an operating head at each end of said shaft, one of said heads having a series of bar receiving fulcrums to accommodate a removable bar for rotating said shaft in a direction to close said door, said fulcrunis being formed with inclined surfaces arranged to disengage said removable bar upon rotation of said shaft in the opposite direction, the other of said heads having a fulcrum spaced from said swinging edge of said door in closed position and located to receive a removable bar between it and said door for prying said shaft from supporting engagement with said door.

3. in a railway car having an opening and a swinging discharge door for closing the same, a shaft, means supporting said shaft along the swinging edge of said door for rotatable and translatory movement to underlie and support said door in closed position and to move from underneath said door to permit it to swin to open position, a winding hub near each end of said shaft, a fiexibie connection between said door and each hub for winding thereon to close said door on rotation of said shaft, and an operating head at each end of said shaft, one of said heads having a series of bar receiving fulcrums to accommodate a removable bar for rotating said shaft in a direction to close said door, said fulcrums being formed with inclined surfaces arranged to disengage said removable bar upon rotation of said shaft in the opposite direction, the other of said heads having a fulcrum spaced from said swinging edge of said door in closed position and located to receive a removable bar between it and said door for prying said shaft from supporting engagement with said door, each of said heads having Wall means extending therefrom lengthwise of said shaft into interfitting relation with the respective hub.

4. In a railway car having an opening, and a swinging discharge door for closing the same, a rotatable shaft adjacent the swinging edge of said door, a pair of hangers pivotally mounted above said shaft on said car for supporting said shaft at its ends, winding hub means nonrotatably mounted on said shaft near each end and between said hangers, fiexible connections between said car and said winding hub means and arranged to Wind therearound to lift said door, operating head means nonrotatably mounted on each end of said shaft for effecting rotation thereof, a wall extending from each head means along said shaft within the respective hub means and secured thereto and to said shaft, and a beating on one of and between said means and individual to each hanger for rotatably mounting the same on said shaft.

5. In a railway car having an opening and a swinging discharge door for closing the same, a rotatable shaft adjacent the swinging edge of said door, a pair of hangers pivotally mounted above said shaft on said car for supporting $31G shaft at its ends, winding hub means nonrotatably mounted on said shaft near each end and between said hangers, fiexibie connections between said car and said winding hub means and arranged to wind therearound to lift said door, operating head means non-rotatably mounted on each end of said shaft for efiecting rotation thereof, a wall extending from each head means along said shaft within the respective hub means and secured thereto and to said shaft, and a bearing on each operating head means for rotatably mounting the respective hanger on said shaft.

6. In a railway car having an opening and a swinging discharge door for closing the same, a rotatable shaft adjacent the swinging edge of said door, a pair of hangers pivotally mounted above said shaft on said car for supporting said shaft at its ends, Winding hub means nonrotatably mounted on said shaft near each end and between said hangers, flexible connections between said car and said winding hub means and arranged to wind therearound to lift said door, operating head means non-rotatably mounted on each end of said shaft for effecting rotation thereof, wall means extending from each hub means and each operating head means along and toward the opposite end of said shaft with the wall means on said head means underlying the wall means on said hub means, means commonly securing said wail means to said shaft, and a bearing on each operating head means for rotatably mounting the respective hanger on said shaft.

References Cited in the file of this patent UNiTED STATES PATENTS 1,155,430 Morey Oct. 5, 1915 1,551,800 Campbell Sept. 1, 1925 1,635,249 Campbell July 12, 1927 1,705,952 Zimmer Mar. 19, 1929 1,818,688 Campbell Aug. 11, 1931 1,892,868 Campbell Jan. 3, 1933 2,240,687 Campbell May 6, 1941 2,371,277 Batho Mar. 13, 1945 2,407,912 Zimmer Sept. 17, 1946 2,477,397 Zimmer July 26, 1949 2,620,745 Zimmer et a1 Dec. 9, 1952

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