US2232851A

US2232851A - Refrigerator car door

Info

Publication number: US2232851A
Application number: US287736A
Authority: US
Inventors: Stacy B Haseltine
Original assignee: W H MINER Inc
Current assignee: W H MINER Inc
Priority date: 1939-08-01
Filing date: 1939-08-01
Publication date: 1941-02-25
Anticipated expiration: 1958-02-25

Description

Feb. 25, 1941. s HASELTINE 2,232,851

REFRIGERATOR CAR DOOR Filed Aug. 1, 1959 3 Sheets-Sheet 1 Feb. 25, 1941. s. B. HASELTINE REFRIGERATOR CAR DOOR Filed Aug. 1, 1939 3 Sheets-She et 2 7 Irweizior Hmeltz'rze Feb. 25, 1941- s. B. HASELTINE REFRIGERATOR CAR DOOR Filed Aug. 1, 1959 s Sheets-Sheet 3 I s A l l l L I l l l l I Ill l lk u i Patented Feb. 25 1941 REFRIGERATOR CAR DOOR Stacy B. Haseltine, La Grange, Ill., assignor to W. H. Miner, Inc., Chicago, 111., a corporation of Delaware Application August 1, 1939, Serial No. 287,736

This invention relates to improvements in refrigerator car doors.

One object of the invention is to provide means for opening and closing single doors of the sliding type for refrigerator cars, which is manually operable and controls movement of the door into and out of the door opening and also serves to either force the door tightly closed or pry the same partly open, and which includes a vertically reciprocating bar having keeper engaging means at the top and bottom ends thereof engageable with keepers above and below the door opening, to perform the last named operation, the bar being also rotatable to control and effect said movement of the door into and out of the door opening.

Another object of the invention is to provide in a door operating mechanism of the character hereinbefore described keeper engaging means for forcing the door tightly closed and prying the same partly open, and rotary crank means for supporting the door and moving the same into and out of the door opening, wherein the keeper engaging means is actuated by manually operated, reciprocating means which is also bodily rotatable to actuate the crank means through means operatively connecting saidcrank means to said reciprocating means for rotation therewith upon said keeper engaging means being disengaged from operative relation "with the cooperating keeper means.

A more specific object of the invention is to provide a mechanism as set forth in the preceding paragraph wherein the means for connecting the crank means to the reciprocating means is in the form of relatively slidable interlocking elements carried respectively by said reciprocating means and said crank means and brought into and out of engagement by reciprocation of the reciprocating means,

A further object of the invention is to provide in a door operating mechanism'including a reciprocating bar for actuating keeper engaging means for forcing the door tightly closed and prying the same open, which bar is also rotatable about its axis to actuate the crank arms and move the door into and out of the door opening, simple, efficient, and compact means for reciprocating and rotating said bar including a single operating lever which is rotatable about the axis of said bar to effect rotation thereof, and is pivoted to swing with respect to the bar about an axis at right angles to the axis of rotation thereof to effect reciprocation of said bar,

Claims.

Other objects of the invention will more clearly appear from the description and claims hereinafter following.

In the drawings forming a part of this specification, Figure 1 is an elevational' view, broken away, of a side wall and a sliding door of a refrigerator ca'r, illustrating my improvements in connection therewith, said view showing the door closed. Figure 2 is a vertical sectional View, on an enlarged scale, corresponding substantially to the line 2--2 of Figure 1. Figure 3 is a vertical sectional view, similar to Figure 2, but showing the parts in different position. Figure 4 is a horizontal sectional view on a still larger scale, corresponding substantially to the line 44 of Figure 3. Figure 5 is a horizontal sectional view on the same scale as Figure 4, corresponding substantially to the line 5-5 of Figure 3. Figure 6 is a broken view of the operating lever means and bar, adjacent the lower right hand end of the door, as seen in Figure 1, illustrating another embodiment of the invention, said view being on a larger scale than Figure 1. Figure 7 is a vertical sectional view, corresponding substantially to the line 1'| of Figure 6.

In said drawings 20 indicates the side wall of a refrigerator car, 2| the door opening, and 22 the single door for closing said opening. 'The single door 22 is slidingly supported by top and

bottom tracks

23 and 24 mounted on the side wall of the car, respectively above and below the door opening 2| and extending lengthwise of the car. The door 22 may be of any wellknown type, and, as illustrated, has the edges: thereof beveled tofit the correspondingly beveled edges on the walls of the door opening 2|, the beveled edge faces of the door being provided with the usual compressible insulation to produce a tight seal when the door is closed.

' The

tracks

23 and 24 may be of any wellknown form. The bottom track 24, as shown most clearly in Figures 1, 2 and 3, is in the form of an elongated bar 25; secured to the side wall of the car by brackets 26 of Z-shaped cross i5 vertically disposed operating bars A-A, which are mounted for rotation and vertical sliding movement with respect to the door; top and bottom supporting crank members B-B .and (Lt-C connected to the bars A-A; keeper engaging T-head members D-D and D-D at the top and bottom ends of said bars; a pair of top keepers E-E; a pair of bottom keepers F-F, said top and bottom. keepers being fixed to the car wall and cooperating with the keeper engaging members of the bars A-A; operating lever means G-G for the bars A-A; and sliding carriers H-H mounted on the bottom track and supporting the crank members CC.

The crank members B-B and C-C support the door for sliding movement along the

tracks

23 and 24 and for lateral movement toward and away from the side wall of said car, said crank members being rotatably supported in bearing brackets 21-21 fixed to the top and bottom portions of the door. The crank members B and C are of similar design, except as hereinafter pointed out. Each crank member comprises a hollow cylindrical sleevelike bearing portion 28 journaled in one of the brackets 21 and having a crank arm 29 extending therefrom radially, as shown most clearly in Figure 1. The crank arms 29-29 of the bottom crank members CC are inclined downwardly and have cylindrical bearing pins 39-30 at their outer ends. The arms 29-29 of the top crank members B-B have their outer ends ofiset upwardly with respect to their inner ends, the portions of said arms between said inner and outer ends extending upwardly and being angularly disposed with respect to said ends. The arm 29 of each member B has a roller 3| at the outer end guided in the channel of the track 23. The roller 3| is journaled in a well-known manner on the arm 29 for rotation about a vertical axis, said arm having an upstanding boss 32 at its outer end provided with a reduced cylindrical bearing portion 33 extending through a bearing opening provided in the central web of the roller.

As will be clear upon reference to Figure 1, the bearing brackets 21-21 and 21-21 are arranged in pairs at opposite ends of the door, the members of each pair being disposed respectively at the top and bottom of the door in vertical alignment. Each bearing bracket 21 is provided with a pair of laterally projecting ears 34-34 by which it is fixed to the door, the same being secured by bolts or similar fastening elements extending through said ears. The main body portion of each bracket is of substantially cylindrical form and has a vertically disposed, cylindrical bearing opening 35 in which the bearing sleeve 28 of the corresponding crank member B or C is journaled.

The crank members C-C are supported on the carriers H-H, which are of well-known design and are supported for sliding movement on the track 24 in a well-known manner. As shown, each carrier H is in the form of a block or slide having downwardly extending flanges 36-36 embracing the top 25 of the rail 24 at opposite sides. Each carrier is further provided with the usual anti-friction rollers 31-31, which are journaled therein and ride on the upper edge face of the track 24. Each carrier is provided with a vertically disposed bearing opening between its ends in which the pin 30 of the corresponding crank member C is rotatably mounted, thus providing for swinging movement of the crank members with respect to the carriers, toward and away from the side wall of the car.

The arm 29 of each crank member B and C has shouldered engagement with the outer end of the corresponding bearing bracket 21, as clearly shown in Figures 2 and 3, to hold these crank members against downward and upward displacement, respectively. The weight of the door is thus supported on the lower crank members C-C. The inner end portion of each arm 29 is recessed, as indicated at 38, for a purpose hereinafter described. The recesses of the arms 29-29 of the top crank members B-B open upwardly and those of the arms of the bottom crank members C-C- open downwardly. The recess 38 of each arm, as most clearly shown in Figure 5, is defined by an outer wall 33 extending lengthwise of said arm and a transverse inner wall 40 extending crosswise of said arm. As will be evident, the recess 38 of each arm is thus open at the extremity and the inner side.

The opening of the hollow cylindrical sleeve portion 23 of each arm is centrally enlarged, as shown in Figures 2 and 3, thus providing bearing openings 4l-4l of reduced size at opposite ends thereof. The openings 4l-4l of each sleeve 28 are of circular cross section and coaxial. As shown most clearly in Figures 2, 3, and 4, the walls of both bearing openings 4l-4I of the sleeve 28 of each crank member B and C are provided with diametrically opposed, vertically aligned slots 42-42 for a purpose hereinafter described.

The bars A-A are preferably in the form of cylindrical shafts and are arranged at opposite ends of the door in vertical position. Each bar A is preferably made in upper and lower sections, joined by a cylindrical sleeve 45 into which the ends of said sections extend and to which they are secured, preferably by welding. Each bar A has its upper and lower ends extending through the bearing sleeves 28-28 of the top and bottom crank members B and C, respectively. These end portions of the bar have a sliding fit within the bearing openings 4l-4l and 4!-4l of said sleeves, whereby the bar is guided for vertical movement.

Each bar A is further supported and guided between its ends in a bracket 43. The bracket 43 has a pair of ears 44-44 by which it is fixed to the outer side of the door. The main body portion of the bracket 43 is of substantially cylindrical form and provided with a vertically disposed bearing opening which is coaxial with the openings in the sleeves 28-28 of the crank members B and C, and accommodates the bar A for both sliding and rotary movement.

The keeper engaging heads D are four in number, each bar A being provided with a pair of said heads D-D, one at the upper and the other at the lower end thereof. Each head D comprises a pair of diametrically opposite, laterally. outwardly projecting, cylindrical lugs 48-46, thus providing a head of T-shaped form at the corresponding end of the bar. Near the lower end, each bar is provided with a pair of diametrically opposite, longitudinally extending ribs 41-41 adapted to interlock with the internal slots42-42 at the upper end of the sleeve 28 of the corresponding bottom crank member C, to eifect rotation of said crank member with the bar, The upper end portions of the ribs 41-41 are of uniform width, as indicated at 48-48 in Figures 2 and 3. The remainder of said ribs are tapered downwardly from said portion 48 to their --ment.

, being swung open.

lower ends. As will be evident, when the bar A is in the raised position shown in Figure 2, clearance is provided between the tapered lower end .of each rib 4'! and the walls of the slot 42 in which it is accommodated, thereby permitting a limited amount of rotation between the bar A and the corresponding bottom crank member 0.

' that when the bar A is in the lowered position shown in Figure 3, the lugs 46-46 of the T-head D at the upper end of the bar A are seated in the recess 38 of the arm 29 of the corresponding crank member B so that the lugs 46 willhave shouldered engagement withthe wall 36 of said recess to lock said crank member B to the bar A for rotation therewith, as clearly indicated in Figure 5. As will be seen upon reference to Figure 5, the inner side of the wall 39 is recessed, as indicated at 49, to accommodate the end of the round bar A.

The keepers E-E and F-F are of similar design except as hereinafter pointed out. As shown in Figures 1, 2, and 3, the keepers E-E are mounted above the door opening 2| at the opposite ends of the same, and the keepers F-F are mounted below said opening at opposite ends thereof. The keepers E and F of each set at each end of said opening are in vertical align- Each keeper E-F is in the form of a casting having securing ears 50-56 projecting from opposite sides thereof. The keepers are fixed to the car wall by bolts or similar securing elements extending through the ears 511-50. Each of the keepers E and F is provided with an inclined camway the camways 5|-5| of the top and bottom keepers being inclined in the samedirection, that is, downwardly away from the side walls of the car.

The camway of each keeper E is defined by a continuous front wall 52 and a centrally slotted back wall 53, parallel to said front wall, the slot of said back wall extending vertically and being continued through the bottom portionof the casting. This slot is of a width to freely acthe wall 39 on the inner end portion of the crank arm 29 of the crank member at the upper end of the corresponding bar A when the door is in the closed position shown in Figure 2. This opening 54 also provides clearance for the lugs 46-46 of the bar A when the door is As clearly shown in Figure 2, the front wall 52 of the keeper E terminates in a straight upper end portion I54, substantially parallel to the side wall of the car for locking the bar A against accidental movement along the guideway due to outwardly acting forces exerted on said bar.

The camway 5| of each bottom keeper F is also defined by substantially parallel front and back walls, indicated respectively by 55 and 56.

The front wall 55 is' vertically slotted from end .to end to accommodate the lower end portion of the bar A. The-slotted arrangement of the front wall 55 provides flanges at opposite sides of the keeper casting, which overhangthelugs 46-46 of the T-head at the lower end of the bar A. The outer lower section of the casting is cut away, as indicated at 51, to provide clearance for the lugs 46-46 of the bar A when the door is being swung open, as hereinafter pointed out.

The front wall 55 of the keeper F also terminates in a straight upper end portion similar to the wall portion I54 of the upper keeper E and serves a similar purpose, said wall portion of the keeper F being indicated by 58. Each of the keepers E and F has an outwardly facing flat l5 abutment face-59 at the bottom thereof, which serves as a limiting stop for the lugs 46-46 of the T-heads at the top and bottom ends of the bar A, thereby assuring alignment of the lugs with the camways 5 l-5l of the keepers E and F when the door is in the partly closed position shown in Figure 3. These abutment faces 59-59 are at the lower ends of the back walls 53 and 56 of the keepers E and F and are continuous with said walls, whereby thelugs of the T-heads D-D of the bar A will be properly guided to enter the ways 5|-5| ofsaid keepers.

I The operating lever means G for effecting vertical sliding movement of the bar A and rotation of said bar about its longitudinal axis comprises an operating handle lever 60 pivotally hung on a bracket 6|, which is mounted for rotation about the bar A, and a slotted guide block'62 fixed to the bar A, with which trunnions 63-63 on the lever cooperate. V 5

The bracket BI is cut out, as indicated at 64, thereby providing horizontally disposed top and bottom sections 65-65 which embrace the bracket 43 from above and below. The sections 65-65 are provided with vertically aligned bearing openings 66-66 through which the bar A extends. The bracket 6| is thus mounted for rota tion on the bar A and is supported and held against movement in a direction lengthwise of the bar A by the bracket 43. The bracket 6| has a depending arm or lug 61 which is offset outwardly with respect to the bar A. The block 62 is preferably welded to the bar A, being cut out at its forward side to embrace substantially half the circumference of the bar. projects rearwardly of the bar A, as seen in Figures 2 and 3, and has substantially fiat side faces. This block terminates clear of the front face of the door 22 so that rotary motion of the bar A will not be interfered with. At'opposite .sides I thereof, the block 62 is provided with horizontally disposed guide slots 68-68.

The handle lever is forked at its inner end, said forked portion, which is indicated by 69, embracing the lower end of the arm 61 of the 60 bracket 6| at opposite sides. A pivot pin 16 extending through suitable openings in the lower end of said arm 61 and through said forked portion 69 of the lever 69 pivotally supports the lever on said bracket. The pivot pin receiving openings of the fork of the lever are preferably slightly elongated in a horizontal direction to avoid binding of the lever on said pivot during swinging movement thereof. The forked portion 69 of the lever 60 extends at an angle to the main body 70 portion of said lever, as clearly shown in Figures 2 and 3,. and has the trunnions 63-63 located at the outer end portion'thereof. These trunnions project from the inner sides of the armsof the forked portion69j and extend into and ride The block 62 50 e within the horizontal slots 68-68 of the block 62, which is fixed on the bar A. As will be evident, when the handle lever 60 is swung from side to side in a horizontal plane, rotary movement will be transmitted to the bar A through said handle lever, the bracket 6| swinging with the lever about the axis of rotation of said bar, and the block 62, which is fixed to the bar A and snugly embraced on its flat sides by the forked end of the lever, compelling rotation of the bar with said lever.

As will be further evident, when the lever 60 is swung in a vertical plane about the pivot 10, sliding movement is imparted to the bar A through the slot and trunnion connection between the bar A and the forked end of the lever, the trunnions 63-63 of the lever traveling inwardly and outwardly along the slots 68-68 as said trunnions are moved in the arc of a circle about the axis of the pivot pin ID of said lever, thereby transmitting reciprocating movement to the bar A through the medium of the block 62, which is fixed to said bar.

As most clearly disclosed in Figure 1, the handle lever 60 is provided with a laterally offset hand grip portion H, which clears the bearing bracket 21 when the handle lever is dropped to the pendant position shown in Figures 1 and 2. The portion of the lever connecting said hand grip H to the main body portion thereof is disposed at substantially right angles to said hand grip and main body and is indicated by 12. The portion '12 of the lever is utilized in locking the mechanism in position to hold the door closed.

As shown, the usual locking latch means, indicated by 1'3, is employed to engage over the portion 12 of the handle 60 to positively lock said handle lever against movement, thus locking the door in the customary manner.

Holding latch means, indicated by 14-14, is also provided for holding the levers 60-60 against rotation when swung against the door in horizontal position. This holding means may be of any well-known form, a member having an upstanding flange in back of which the lever 60 is dropped, being preferably employed.

In assembling the mechanism, the bearing bracket 21, together with the crank member B, the bearing bracket 43, and the supporting bracket 6| with the handle lever 60 attached, are applied to the upper section, and the bearing member 21, together with the crank member C, are applied to the lower section of the bar A before these two sections are joined. The two sections of the bar are then joined by the sleeve 45 and welded thereto. The parts may be then applied to the car door and car wall in any convenient manner, the crank members B and C being preferably engaged with the upper track and the carrier on the lower track before the supporting bearing brackets 21-21, and 43 are secured to the door. The keepers E-E and F-F may be secured to the car wall either before or after application of the operating mechanism to said door.

The operation of my improved door mechanism, as disclosed in Figures 1 to 5 inclusive, assuming the door is in the closed position shown in Figures 1 and 2, is as follows: After unlocking the latch members 13-73 in the usual way, each operating lever 60 is swung outwardly and upwardly from the pendant position shown in Figures 1 and .2 to a substantially horizontal position, thereby moving the parts from the position in Figure 2 to that shown in Figure 3. As

will be evident, the levers 60-60 may be operated either simultaneously or successively. During the upward swinging movement of the lever 60 of each operating mechanism, sliding movement is imparted to the bar, A, as hereinbefore pointed out. This sliding movement is in a downward direction and. the lugs 46-46 of the T-heads D-D at the top and bottom ends of the bar travel downwardly in the guideways 5l-5l of the keepers E and F, camming the door 22 outwardly until the position shown in Figure 3 is reached. During this downward movement of the bar A, the tapered ribs 41-41 on the bar travel inwardly of the bearing sleeve 28 of the crank member C until the locking portions 48-48 of said ribs are seated in the slots 42-42 of said sleeve to lock the crank member to the bar A for rotation therewith. At the same time, the lugs 46-46 of the T-head D at the upper end of the bar A will have passed out of the way 5| of the top keeper E and into the recessed portion 38 of the crank arm 29 of the crank member B and to operative engaging position with respect to the wall 39 of said recessed portion 38, as shown in Figures 3 and 5, to effect rotation of the crank member B in unison with the shaft A when the latter is rotated.

As shown in Figure 2, when the camming operation has been completed, the lugs 46-46 of the lower T-head D of the bar A will have entirely cleared the guideway 5| of the keeper F and are free to pass out of said keeper through the opening provided by the cut away portion 57. Similarly, the lugs 46-46 of the T-head D at the upper end of the bar are free to leave the keeper E through the opening provided by said cut away portion 54.

As will be evident, when the levers 60 are thus operated, there will be slight rotary movement or angling of the crank members with respect to the door as the same is being forced out of the door opening. The clearance provided by the taper of the ribs 41-41 of the bar A allows for this angling without any danger of binding of the, parts of the operating mechanism. A

When the door has been freed from. the door same direction in moving the door out of the door opening, the same being swung toward the door to positions to the right of the bars, thus effecting contraclockwise rotation of said bars.

The door 22 is thus moved out of the door opening 2|, clear of the side wall of the car, so that the door may be slid along the

tracks

23 and 24 to entirely clear the door opening. In order to prevent accidental movement of the crank arms and consequent displacement of the door inwardly or outwardly with respect to the tracks while the door is being slid along the tracks, the handle lever 60-60 are preferably latched in position by the latch members 14-14.

In closing the door, the operation is substantially the reverse of that hereinbefore described. The door is slid along the

tracks

23 and 24 into position in front of the door opening 2|. The handle levers 60-60 are then disengaged from the latch means 14-14 and swung through HICSH,"

of 90, thereby rotating the crank members B and C and moving the door to the position shown in Figure 2. At the end of this part of the operation, the lever arms 60-66 are disposed in horizontal position, extending outwardly at right angles to the plane of the door. In moving the door to the position shown in Figure 2, the keeper engaging T-heads D-D are brought into engagement with the abutment faces 59-59 of the keepers, thus positively arresting further inward movement of the door and aligning the lugs 46-46 and 46-46 of the T-heads with the guideways 5I-5I of the top and bottom keepers E and F. When the parts are in the last described position, each operating lever 60 is swung downwardly to pendant position, as shown in Figures 1 and 2, thereby raising the bar A vertically and moving the T-heads D-D upwardly along the guideways 5I-5I of the keepers to cam the door tightly shut. The levers which are in pendant position when the door has been forced tightly closed are then looked and sealed in the usual manner by the latch members 13-13.

Referring next to the embodiment of the invention illustrated in Figures 6 and 7, my improvements involve a modified form of lever actuating means for the bars A shown in Figures 1 to 5 inclusive. The lever actuating means disclosed in Figures 6 and '7 comprises a handle lever ill, a link I12, and a supporting bracket I13. The supporting bracket I13 is mounted in a manner similar to the supporting bracket 6|, hereinbefore described, and is of substantially the same design. The supporting bracket I13 is rotatable on the bar A and held against lengthwise movement with respect to the same by engagement with the bearing bracket 43 in the same manner as the supporting bracket 6 I. The bracket I13 has a depending arm I14 having a transverse pivot pin receiving opening in its lower end. The link I12 is forked at its upper end, and the arms of said forked end embrace the depending arm I14 of the bracket I13, and is pivotally connected thereto at its upper end by a pivot pin extending through said arms of the fork and the pin opening in the arm I14 of the bracket I13. The handle lever I1I is pivotally connected to the bottom end of the link I12 by a pivot pin I15 extending through the link and the lever, the lever being forked to embrace the link. The lever I1I has an angular inner end section I16 extending beyond said pivotal connection I15, said extension I16 being forked and having the arms of the fork embracing the bar A. The free ends of the arms of said forked section are pivotally connected to the bar A by a pin 11 extending through said bar and the fork of the handle lever I1I. As will be evident, when the handle lever I1I is raised from the pendant position shown in Figures 6 and '1 toward the horizontal position, the bar A is moved downwardly through the toggle action of the link connection with the bracket I13 and when the lever is again dropped to pendant position the bar A is moved upwardly, thus, the bar A is reciprocated in the same manner as in the structure disclosed in Figures 1 to 5 inclusive, to force the door open and closed by engagement of the T-heads D-D with the corresponding keepers. As will be further evident, the handle lever I1I being connected to the bar A by the pivot pin 11, the bar A is rotated with the lever in the same manner as described in connection with the structure disclosed in Figures 1 to 5 inclusive. The crank arms are thus rotated with the bar A about the axis of the same to move the door out of and into the door opening.

I have herein shown and described what I now consider the preferred manner of carrying out my invention, but the same is merely illustrative and I contemplate all changes and modifications that come within the scope of the claims appended hereto.

I claim:

1. In a door construction for refrigerator cars having a wall member provided with a door opening, the combination with a door for closing said opening; of swingable means journaled on the door for supporting said doorand u ding the same into and out of the door opening; a keeper engaging bar mounted on the door for rotary and sliding movement lengthwise re-' verse directions, said bar having keeper engaging lugs at the top and bottom ends thereof; top and bottom keepers on the car wall respectively above and below the door opening having inclined camways with which said lugs of said bar are engageable to force the door tightly closed when said bar is slid in one direction, and pry said door partly open when said bar is slid in the other direction, the camways of said top andbottom keepers being inclined in the same direction; and manually actuated lever means swingable in one plane for sliding said bar in reverse directions to engage the same with the keepers and disengage it therefrom, and swingable in another plane for imparting rotation to said bar.

2. In a door construction for refrigerator cars having a wall member provided with a door opening, the combination with a door for closing said opening; of a top and bottom supporting crank member journaled on said door; a bar mounted on said door for rotary movement and sliding movement lengthwise in reverse directions; keeper engaging lugs on said bar; top and bottom keepers on the car wall having cam slots with which said lugs are engageable to force the door tightly closed when said bar is slid in one direction and pry said door partly open when said bar is slid in the other direction, said slots of the top and bottom keepers being inclined in the same direction; means-0n one of said. crank members with which said bar has shouldered engagement when said lugs are disengaged from said keepers to lock said last named crank member to the bar for rotation in unison therewith; and manually actuated means operatively connected to said bar for reciprocating and rotating the same.-

3. In a door construction for refrigerator cars having a wall member provided with a door opening, the combination with a door for closing said opening; of a supporting crank member having a journal portion rotatably mounted on the door; a bar mounted on said door for rotary movement and sliding movement lengthwise in reverse directions, said bar extending through said journal portion of the crank member; keeper engaging lugs on the top and bottom ends of said bar; top and bottom keepers on the car wall having inclined camways with which said lugs of said bar are engageable to force the door tightly closed when said bar is slid in downward direction to move said lugs downwardly along said camways and pry said door partly open when said bar is slid in an upward direction to move said lugs upwardly along said guideways; radial locking projections on said bar and cooperating locking shoulders on said journal portion of one of said crank members, said locking projections being moved into engagement with said shoulders when said keeper lugs are disengaged from the keepers; and manually actuated means operatively connected to said bar for reciprocating and rotating the same.

4. In a door construction for refrigerator cars having a wall member provided with a door opening, the combination with a door adapted to close said opening; of supporting crank members rotatably mounted on the door at the top and bottom thereof; a rotary actuating bar connected to both of said crank members, said bar being slidable lengthwise with respect to said crank members; keeper engaging means on said bar at the top and bottom ends thereof; keepers at the top and bottom of the door with which said keeper engaging means cooperates to force the door tightly closed when the bar is slid in one direction and pry the same open when said bar is slid lengthwise in a reverse direction; and means for imparting rotary and sliding movement to said bar.

5. In .a door construction for refrigerator cars having a wall member provided with a door opening, the combination with a door adapted to close said opening; of keepers on the car above and below the door opening; a reciprocating bar on the door simultaneously engageable with said keepers for forcing the door tightly closed when said bar is moved bodily in one direction, and prying the same partly open when said bar is bodily moved in a reverse direction, said reciprocating bar being rotatably mounted on the door; actuating means for imparting rotary and reciprocating movement to said bar; pivoted supporting arms at the top and bottom of the door for guiding the door into and out of the door opening; and means operatively connecting said arms to said bar to impart rotary movement to said arms from said bar to swing said arms and move the door into and out of the door openmg.

6. In a door construction for refrigerator cars having a wall member provided with a door opening, the combination with a door adapted to close said opening; of swinging arms journaled on said door at the top and bottom thereof for guiding the door into and out of the door opening; a vertically disposed operating bar supported on said door for rotation, and sliding movement lengthwise of its axis of rotation; top and bottom keeper engaging cam means on the upper .and lower ends of said bar; means operatively connecting said bar to at least one of said crank arms to rotate the latter to move said door into and out of the door opening; means for imparting rotary and sliding movement to said bar; and top and bottom keepers on said car above and below said door opening having camways inclined in the same direction engaged respectively by the top and bottom keeper engaging cam means of said bar durin sliding movement of said bar to either force the door tightly closed or pry the same partly open.

'7. In a door construction for refrigerator cars having a wall member provided with a door opening, the combination with a door adapted to close said opening; of means for either moving said door into the door opening to partly closed position or withdrawing said door from the door opening from said partly closed position, including a supporting crank arm having a sleevelike journal portion rotatably mounted on the door; means for forcing said door tightly closed from said partly closed position, or prying said door partly open, including a keeper having a camway, a bar slidable in said sleeve and having a head engageable with said camway; lugs on said bar slidable into shouldered engagement with said journal portion of the crank arm to operatively connect said crank arm to said bar for rotation in unison therewith; and means for imparting rotary and sliding movement to said bar.

8. In a door construction for refrigerator cars having a wall member provided with a door opening, the combination with a door for closing said opening; of keepers at the top and bottom of said door opening; rotatable crank members at the top and bottom of the door supporting the same for in and out movement; a vertical operating bar rotatably and slidably mounted on the door and having keeper engaging means at the top and bottom ends thereof movable bodily with said bar for forcing said door tightly closed when said bar is slid lengthwise in one direction and prying the same open when said bar is slid lengthwise in a reverse direction, said crank members being rotatable with said bar; a supporting bracket on said door mountedfor rotation about the axis of rotation of said bar; an operating lever pivotally supported by said bracket for swinging movement in a plane parallel' to the longitudinal .axis of said bar; and means connecting said lever to the bar for rotating said bar when the lever is swung about the longitudinal axis of said bar and reciprocating said bar when the lever is swung in said plane parallel to said axis of rotation of the bar.

9. In a door construction for refrigerator cars having a wall member provided with a door opening, the combination with a door for closing said opening; of means for opening and closing said door including an operating bar rotatably and slidably' mounted on said door; a supporting bracket on said door rotatable about the axis of rotation of said bar; and an operating lever pivoted between its ends on said bracket for swinging movement on an axis at right angles to the axis of rotation of said bar, the inner end of said lever having'a sliding pivotal connection with said bar for imparting reciprocating movement tosaid bar when the lever isswung on its pivot, said lever having driving connection with said bar for rotating the same.

10. In a door construction for refrigerator cars having'a wall member provided with a door opening, the combination with a door for closing said opening; of means for opening and closing said door including a vertically disposed bar mounted on said door for rotary and axially sliding movement, a section of said bar having horizontally disposed guide slots on opposite sides thereof. said sides at said slots presenting'flat abutment faces, a supporting bracket mounted on said door for rotation about the axis of said bar, said bracket being held against movement lengthwise of said bar, an operating lever having a forked end portion embracing said slotted section of the bar from. opposite sides to lock said bar to said lever for rotation therewith about the longitudinal axis of the bar, trunnions on said fork of the lever guided in said slots, and pivot means between the ends of said lever pivotally connecting said lever to said supporting bracket for swinging movement ina vertical plane.

111 In a door construction for refrigerator cars havingawallmember provided with a door opening, the combination with a door for closing said opening; of means for opening and closing said door including a vertically disposed rotary bar mounted on said door for rotary and axially sliding movement, an operating lever, a slot and pin connection between said lever and bar at the inner end of said lever, and a bracket to which said lever is pivoted between its ends for swinging movement in a vertical plane, said bracket being supported on said door for rotation about the axis of said bar and held against displacement lengthwise of said bar.

12. In a door construction for refrigerator cars having a wall member provided with a door opening, the combination with a door for closing said opening; of means for opening and closing said door including a vertically disposed rotary bar mounted on the door, an operating lever pivoted at its inner end to said bar for rotation on a horizontal axis, a supporting bracket held against movement in vertical direction and rotatably mounted on said door for swinging movement about the axis of said bar, a link supporting said lever on said bracket, said link having its opposite ends pivoted to said bracket and lever respectively for swinging movement on horizontal axes.

13. In a door construction for refrigerator cars having a wall member provided with a door opening, the combination with a door adapted to close said opening; of keeper means on the car above and below said door opening; a longitudinally slidable bar on said door and having keeper engaging lugs at the top and bottom ends thereof and cooperating with said keepers to either force the door tightly closed or pry the same partly open when said bar is slid lengthwise; manually actuated means for imparting either rotary or longitudinal sliding movement to said bar; driving lugs on said bar; and rotary top and bottom crank arms supporting said door and with which said driving lugs and keeper engaging lugs at the top of said bar have shouldered'engagement respectively for rotating said crank arms to move said door either to or from said partly closed position.

14. In a door construction for reirigerator cars having a wall member provided with a door opening, the combination with a door adapted to close said opening; of top and bottom crank members for supporting said door for movement into and out of the door opening, said crank members having vertically aligned journal sleeve portions rotatably mounted on the door; a vertically disposed operating bar having its upper and lower ends extending through said sleeves said bar being slidably guided by said sleeve portions; keepers on the car above and below said door opening with which said bar is engageable; and manually actuated means for successively imparting rotary and sliding movement to said bar to successively impart rotary movement to said crank members to move the door partly closed, and sliding movemerit to said bar lengthwise in one direction to engage the same with said keepers to force the door completely closed.

15. In a door construction for refrigerator cars having a wall member provided with a door opening, the combination with a door adapted to close said opening; of guide tracks on said wall member above and below the door opening; top and bottom crank members mounted on the door for rotation about vertically aligned axes; a crank arm on each crank member; means for pivotally and slidingly supporting the outer ends of said arms on the tracks; a vertically disposed operating bar on the doorl connected to said top and bottom crank members for rotation therewith, said bar being concentric with the axis of rotation of said crank membersand being slidable lengthwise of said axis of rotation; keeper engaging means rigid with the top and bottom ends of said bar; and keepers on the car having cam slots with which the keeper engaging means cooperates during sliding movement of the bar to either force the door tightly closed or pry the same partly