US3815764A

US3815764A - Load body with load compacting and ejecting blade

Info

Publication number: US3815764A
Application number: US00264829A
Authority: US
Inventors: W Gilfillan; S Spector
Original assignee: East Coast Equipment Corp
Current assignee: Blue Tee Corp; East Coast Equipment Corp
Priority date: 1972-06-21
Filing date: 1972-06-21
Publication date: 1974-06-11
Anticipated expiration: 1991-06-11
Also published as: CA992032A

Abstract

An upwardly opening load body including first and second ends and having an openable end gate at its first end and a load ejecting blade positioned within its second end for movement toward and away from the first end of the load bed. The blade may be utilized to eject a load from the load body or bed when the end gate is open and may also be utilized to compact a load within the body against the end gate when the latter is closed. The body includes upstanding side walls between which the ejecting and compacting blade is received and the side walls define corresponding longitudinal guideways in which followers carried by the corresponding sides of the ejector blade are guidingly received, the engagement of the blade supported followers in the side wall guideways insuring proper centering of the blade between the side walls and resisting spreading of the side walls due to compaction of a load therebetween.

Description

United States Patent [19 Gilfillan et al.

[ LOAD BODY WITH LOAD COMPACTING AND EJECTING BLADE [75] inventors: William C. Gilfillan, Nesquehoning;

Saul R. Spector, Pottsville, both of Pa.

[73] Assignee: East Coast Equipment Corp., St.

Clair, Pa!

[22] Filed: June 21, 1972 [21] Appl. No.: 264,829

[52] US. Cl. 214/82 [51] Int. Cl B60p 1/00 [58] Field of Search 214/82, 83.3

[56] References Cited UNITED STATES PATENTS 3,049,250 8/1962 Dempster et a1. 214/82 3,175,708 3/1965 Felts 214/82 3,240,370 3/1966 Sadler n .214/82 X 3,247,985 4/1966 Scardoni 214/82 3,252,602 5/1966 Bowles i 214/82 3,273,728 9/1966 Kelso 214/82 3,489,302 l/l970 Danzart, 214/82 X June 11, 1974 Primary Examiner-Robert J. Spar Attorney, Agent, or FirmClarence A. OBrien; Harvey B. Jacobson [5 7] ABSTRACT An upwardly opening load body including first and.

second ends and having an openable end gate at its first end and a load ejecting blade positioned within its second end for movement toward and away from the first end of the load bed. The blade may be utilized to eject a load from the load body or bed when the end gate is open and may also be utilized to compact a load within the body against the end gate when the latter is closed. The body includes upstanding side walls between which the ejecting and compacting blade is received and the side walls define corresponding longitudinal guideways in which followers carried by the I corresponding sides of the ejector blade are guidingly received, the engagement of the blade supported followers in the side wallguideways insuring 'proper' centering of the blade between the side walls and resisting spreading of the sidewalls due to compaction of a load therebetween.

9 Claims, 9 Drawing Figures PATENTEDJHH 1 1 m 1 3815764 SHEET 30F 4 Fig. 4

IIIIIIIIIIIIIIIY 17 LOAD BODY WITH LOAD COMPACTING AND EJECTING BLADE 'mounted blade connected directly to a double acting telescopic cylinder and guided from the side walls of the body for compacting a load against the end gate of the body when the end gate is closed and ejecting a load from the body when the end gate is open.

The various types of conventional load carrying vehicle bodies include dump bodies, such as are mounted on truck or trailer chassis and utilize hydraulic cylinders to raise the front of the dump body so that the load within thebody may be dumped therefrom by gravity from the open rear of the body. This conventional type of load body cannot function to compact a load therein, requires considerable height to complete the dumping operation, is difficult to control the rate of dumping and creates an unstable condition when the body is long and/or the load is not uniform and/or when the grade on which the unit is supported is inclined.

Another type of load body presently in use if that which is referred to as an Ejecto body. This type of body is open at its top with a front mounted blade. The blade is powered by a cable which is in turn powered by means of sheaves, the center distance of which are lengthened and shortened by a double acting hydraulic cylinder. This type of load ejecting body has disadvantages including a system which is complicated and more difficult to maintain, the blade is supported on the outside of the body and the inside width and, therefore, the volume of the body is reduced in order to maintain the body within the maxim 96 inch width required, body size is limited becuase of limitations imposed by inherent physical characteristics of the cable actuated Ejecto body, and compaction forces of great magnitude cannot be developed.

A third type of conventional load body presently in use is that type including a closed top with a top opening for loading. This type of unit is provided with a front mounted blade which is directly coupled to a double acting hydraulic cylinder which may compact against the end gate when the end gate is closed and eject the load when the end is open. However, this type of unit includes disadvantages in that it must be loaded through the top opening, usually by means of a hopper, or through the rear end gate by means of a compactor blade. Also, this type of load body requires the utilization of the top in order to keep the side walls from spreading during the compacting operation and in this type of unit the blade is either supported by side rails on the floor of the load bed and/or sides or by a rail and rollers in the center of the body. In either instance, if the sides were stiffened and the roof removed, direct dumping by conventional means, such as loaders or cranes, would damage the blade supports.

The load body ofv the instant invention includes an open top and openable end gate as well as a hydraulic cylinder actuated compacting and ejecting blade disposed within the body. However, the sides of the body are stiffened to resist spreading and the ejecting and compacting blade is supported from the body in a manner requiring very little internal volume of the body and in a manner whereby the compacting and ejecting blade is connected to the side walls of the body by means of a movable connection so as to insure proper centering of the blade between the side walls and to also further resist spreading of the side walls.

The main object of this invention is to provide a load body with a load compacting and ejecting blade and constructed in a manner whereby maximum internal volume and ease in compacting. and ejecting of theload within the body may be realized.

Another object of this invention is to provide a load body in accordance with the immediately preceding object which will enable direct dumping by conventional means, such as loaders and/or'cranes, without damaging the structure by which the ejector blade is supported within the load body.

Still another object of this invention is to provide an ejector blade type of load body constructed in a manner whereby the clearance between the lower marginal edge portion of the ejector blade and the associated floor of the body may be adjusted.

Another object of this invention is to provide an ejector blade type of body powered by means of a multistage hydraulic cylinder and with the hydraulic cylinder having an intermediate portion thereof guidingly supported for movement longitudinally of the load body so as to prevent lateral deflection of the intermediate sections of the multi-stage cylinder when it is substantially fully extended.

Another important object of this invention is to provide a hydraulic cylinder powered ejector blade assembly constructed in a manner wherein a major portion of the length of the base sectionof the hydraulic cylinder is disposed forward of the load engaging face of the blade so that the blade may be moved to a position closely adjacentthe forward endof theload bed.

A further object of this invention is'to provide a movable connection between the ejector blade and the side walls of the associated load bed whereby the blade may X be maintained centered between the side walls and spreading of the sidewalls may be resisted.

A final object of this inventionto be specifically enumerated herein is to provide a load body with a load compacting and ejecting blade in accordance with the preceding objects which will conform to conventional forms of manufacture, be of simple construction and dependable in operation so as to provide a device that will be economically feasible, long lasting and relatively trouble free.

These together with other objects and advantages which will become subsequently apparent reside in the details of construction and operation as more fully hereinafter described and claimed, reference being had to the accompanying drawings forming a part hereof, wherein like numerals refer to like parts throughout, and in which:

FIG. 1 is a top plan view of the load bed body of the instant invention with a load ejecting position of the ejector blade and an open position of the end gate being illustrated in phantom lines;

FIG. 2 is a longitudinal, vertical, sectional view taken substantially upon the plane indicated by the section line 2-2 of FIG. 1;

FIG. 3 is an enlarged transverse, vertical, sectional view taken substantially upon the plane indicated by the section line 3-3 of FIG. 2;

FIG. 4 is an end elevational view of the load bed as seen from the front end thereof, with the front wall of the load body removed;

FIG. 5 is a fragmentary, longitudinal, vertical, sectional view taken substantially-upon the plane indicated by the section line 55 of FIG. 4;

FIG. 6 is an enlarged fragmentary, horizontal, sectional view taken substantially upon the plane indicated by the section line 6-6 of FIG. 5;

FIG. 7 is a fragmentary vertical, sectional view taken substantially upon the plane indicated by the section line 77 of FIG. 6;

FIG. 8 is an enlarged fragmentary transverseQvertical, sectional view taken substantially upon the plane indicated by the section line 88 of FIG. 5; and

FIG. 9 is a fragmentary longitudinal, vertical, sectional view taken substantially upon the plane indicated by the section line 9-9 of FIG. 8. Referring now more specifically to the drawings, the numeral 10 generally designates the load body of the instant invention. The body 10 includes a floor assembly referred to in general by the reference number 12 supported on a pair of right and left hand upstanding side wall assemblies referred to in general by the reference numeral 16. The rear end of the body 10 includes an end gate 18 which is swingable between the closed solid line positions illustrated in FIGS. 1 and 2 of the drawings and the phantom line open position illustrated in FIGS. 1 and 2 of the drawings. In addition, the load body 10 includes an ejector blade assembly referred to in general by the reference numeral 20, a hydraulic cylinder assembly 22 for shifting the ejector blade assembly 20, an anchor assembly 24 for the hydraulic cylinders 22 and a support and guide carriage assembly 26 forv an intermediate portion of the hydraulic cylinder assembly 22.

The floor assembly 12 includes a plurality of longitudinally spaced transversely extending I-beams 28 secured across the boxed I-beams 14 and a flooring plate assembly 30 secured across the I-beams 28. The side walls 16 each include aninner side wall plate assembly 32 and longitudinally spaced upstanding side wall posts 34 are secured tothe outer surfaces of the side wall plate assemblies 32 on 2 foot centers and terminate downwardly at and are secured to the flooring plate assembly 30. Under every third side wall post 34 is a 3 inch I-beam stiffener 36 welded to the side wall plate assembly 32 'on 6 foot centers. The stiffeners 36 project through and below the flooring assembly 12 and are braced relative to the I-beams 28 by means of gusset plates 38. The upper marginal edge portion of each side wall plate assembly 32 includes an outer tubular stiffener 40 extending longitudinally therealong and each stiffener 40 has an inverted V-shaped protector angle 42 secured to its upper surface.

The ejector blade assembly includes a rearwardly and downwardly inclined lower body plate portion 44, a substantially vertical intermediate body plate portion 46 and a rearwardly and upwardly inclined upper body plate portion 48. The body plate portions are integral and the upstanding side marginal edge portions thereof include rearwardly angled marginal portions 44', 46'

. and 48. The central portion of the lower plate portion 44 has a rectangular opening formed therethrough through which a rectangular sleeve 50 is secured. A longer protective pipe 52 extends through and is secured in the sleeve 50 and the rear end portions of the sleeve 50 and the pipe 52 are braced relative to the plate portion 44 by means of

gusset plates

54 and 56. As may be seen from a comparison of FIGS. 4 and 5 of ferred to in general by the reference numeral 64.

The carriage assembly 64 includes lower opposite side longitudinal members 66 from'which front and rear

tapered rollers

68 and 70 are journaled. The rollers 70 are fixed in position relative to the member 66. However, the rollers 68 are mounted from eccentric supports 72 whereby the vertical positioning of the rollers 68 may be adjusted relative to the longitudinal members 66. Thus, the scraper blade portion 62 may be adjusted in position relative to the flooring plate assembly 30 by raising and lowering the front-rollers 68, as desired.

The lower marginal portions of the side walls 16 include inwardly opening longitudinally extending channels 74 in which the

rollers

68 and 70 are rollingly received and the channels 74 are spaced slightly above the flooring panel assembly 30 and supported from the latter by means of short longitudinally spaced transversely extending I-beams 76, there being provided closure plates 78 secured across each set of inner ends of the I-beams 76. Also, a pair of upwardly and outwardly inclined plates 80 are secured between the upper inner marginal edge portions of the channels 74 and the inner surfaces of the side wall plate assemblies 32 are disposed thereabove. i

A heavy duty Z angle plate 82 is secured longitudinally along the inner surface of each side wall plate assembly 32 and each plate 80 defines a downwardly opening channel 84. A pair of plates 85 corresponding to the plates 80 are secured between the upper innermost marginal portions of the angle plates 82 and portions of the side wall plate assemblies 32 disposed thereabove.

The ejector blade assembly 20 includes a pair of opposite side tubular mounts 86 in which a pair of tension arms 88 are slidingly telescoped. The arms 88 extend transversely of the load bed 10 and carry vertically adjustable upstanding rollers 90 on their outer ends disposed in the channels 84 and rollingly engaged with the angle plate 82. The inner ends of the arms 88 are acted upon by heavy duty coil springs 92, see FIG. 8, and in this manner the ejector blade assembly 20 is maintained centered between the side walls 16. Also, the spring urged arms 88 and the rollers 90 tend to prevent the side walls 16 from spreading.

The anchor assembly 24 comprises a pair of boxed l-beams 94 anchored in position on the floor assembly 12 by means of vertically extending opposite side anchor straps 96 secured to the boxed I-beams 94, passing downwardly through the floor assembly 12 and secured to the boxed I-beams 14. A cylindrical cross member 98 is secured and extends between the boxed I-beams 94 and it carries a center upstanding structure 100 between whose opposite side plates 102 the free end of the fifth extendable section 104 of the hydraulic cylinder assembly 22 is secured as at 106. The hydraulic cylinder assembly also includes fourth, third, second and first extendable sections 108, 110, 112 and 114 as well as a main cylinder portion 116. The main cylinder portion 116 is secured to the carriage assembly 64 by means of a trunnion mount 118 secured to the framing carried by the front face of the ejector blade assembly 20. The trunnion mount 118 includes a collar 120 carried by the cylinder 116 andincluding diametrically opposite trunnion pins 122 received through trunnion blocks 124 secured to the framework of the ejector blade assembly 20, see FIGS. 4 and 5.

The outer end of the third section 110 of the cylinder assembly 22 is supported from the support and guide carriage assembly 26. The assembly 26 includes a horizontal transverse member 130 including opposite side depending legs 132 from the lower ends of which a pair of rollers 134 are journaled, the rollers 134 being also rollingly received within the channels 74. Accordingly, when the hydraulic cylinder assembly 22 is in an extended position such as that illustrated in phantom lines in FIGS. 1 and 2 of the drawings, the outer end of the third extendable section 110 is supported against lateral deflection in any direction perpendicular to the center line of the hydraulic cylinder assembly 22.

From FIG. 3 of the drawings it may be seenthat the lower opposite side marginal portions of the plate portion 44 include tongues 138 which ride in the channel members 74 in advance of the

rollers

70, 68 and 134 in order to maintain the channel members 74 clean as the ejector blade assembly 20 moves toward the rear of the load bed 10. In addition, the upper opposite side marginal portions of the plate portion include additional tongues 140 which ride in the channels 84 in advance of the rollers 90 when the ejector blade assembly 20 ismoving toward the rear of the load bed 10.

In operation, the load bed may be loaded through its open top with the end gate 18 secured in its closed position in any convenient manner (not shown). After a portion of a load has been placed in the load bed 10, the load may be compacted by actuation of the hydraulic cylinder assembly 22 to force the ejector blade assembly 20 toward the end gate 18 and thereby compacting the load within the load body 10 against the closed end gate 18. Then, the ejector blade assembly 20 may again be retracted to the front end of the load bed 10 after which additional loads may be placed within the load bed or body 10. After repeated compacting of the load within the load body 10, the latter may be transported to a point of discharge and the end gate 18 may be opened. Thereafter, the hydraulic cylinv der assembly 22 may again be actuated to eject the load from the load body 10 in. a controlled manner.

During the load compacting process, there is a tendency for the sides or side walls 16 to spread apart. However, this tendency is resisted by the I-beam stiffeners 36 and side wall posts'34 and the manner in which the posts and I-beam stiffeners are raised relative to the underside of the flooring assembly 12 by means of the bracing plates 38. In addition, the coil springs 92 exert approximately a 1,000 pound thrust on each of the anns 88. In this manner, the blade assembly 20 is maintained centered between the side walls 16 and each side wall 16 has a force of at least 1,000 pounds acting thereon adjacent the blade assembly 20 in opposition to spreading of the side walls 16.

Although there has been no control assembly illustrated for controlling the operation of the hydraulic cylinder assembly 22, it is to be noted that it is proposed that such a control system will include a pressure sensing reversing control whereby movement of the blade assembly 20 to its full limit stop position adjacent the cylinder assembly 22 and automatically reverse operation of the cylinder assembly 22 so as to contract the latter and return the blade assembly 20 to the front end of the load body 10. In addition, this same pressure sensing control will automatically reverse the blade assembly 20 when a partial load is being compacted against the end gate 18 as the same maximum pressure is reached.

The foregoing is considered as illustrative only of the principles of the invention. Further, since numerous modifications and changes will readily occur to those skilled in the art, it is not desired to limit the invention to the exact construction and operation shown and described, and accordingly all suitable modifications and equivalents may be resorted to, falling within the scope of the invention.

What is claimed as new is as follows:

1. A load body defining an upwardly opening elongated receptacle having first and second ends and consisting of an elongated flooring assembly and a pair of opposite side upstanding side walls extending along and projecting upwardly from opposite side marginal edge portions of said flooring assembly, one end of said body including an openable end gate and the opposite'end portion of said body having an upstanding transverse partition disposed therein between said side walls and guidingly engaged with the body for movement toward and away from said one end thereof, said body including motor means drivingly connected to said partition for selectively shifting the latter longitudinally of saidbody, said side walls including longitudinally extending guideway defining means spaced appreciably above said flooring assembly, said partition including followers guidingly engaged in said guideway defining means for movement therealong and against lateral inward movement relative to said guideway defining means, said followers being supported from said partition for limited movement horizontally along the partition transversely of said body, and force means operatively connected between said partition and said followers yieldingly biasing said followers inwardly toward each other.

2. The combination of claim 1 wherein said side walls include longitudinally spaced upstanding hollow reinforcing posts with internal stiffeners projecting downwardly below the corresponding side marginal portions of said flooring assembly, the lower end portions of said stiffeners projecting below said flooring assembly .being braced relative to the adjacent underside portions of the corresponding side marginal portions of said flooring assembly.

3. The combination of claim 2 wherein the bracing between the lower end portions of said stiffeners and said flooring assembly side marginal portions includes transverse upstanding gusset plates secured to the underside surface portions of said flooring assembly and the inner side portions of the lower ends of said stiffeners projecting below said flooring assembly.

4. The combination of claim 3 wherein said stiffeners comprise I-beam members.

5. The combination of claim 1 wherein said flooring assembly includes a flooring plate assembly secured over a plurality of longitudinally spaced transverse beams, said side walls includinglongitudinally spaced upstanding hollow reinforcing posts with internal stiffeners projecting downwardly below the corresponding side marginal portions of said flooring plate assembly and the adjacent ends of at least some of said transverse beams, and brace means secured between the lower end portions of said stiffeners and the underside portions of said some transverse beams of said flooring assembly, said brace means including transverse upstanding gusset plates secured to the underside surface portions of said transverse beams and the inner side portions'of the lower ends of said stiffeners projecting below said transverse beams.

6. The combination of claim 1 wherein said motor means comprises a multi-stage hydraulic cylinder including a base end section secured longitudinally through and to a lower transverse center portion of said partition, a transverse horizontal anchor assembly supported in the other end of said body above said flooring assembly, the free extendable end of said cylinder being secured to said transverse horizontal anchor assembly, said multi-stage hydraulic cylinder including at least three relatively telescoped extendable sections, a guide carriage disposed between said partition and said anchor assembly, said guide carriage also including followers guidingly engaged in said guideway defining means, an intermediate section of said relatively telescoped extendable hydraulic cylinder sections being supported from said guide carriage against lateral deflection in all directions perpendicular to the centerline of said hydraulic cylinder. I

7. A load body defining an upwardly opening elongated receptacle having first and second ends and consisting of an elongated flooring assembly and a pair of opposite side upstanding side walls extending along and projecting upwardly from opposite side marginal edge portions of said flooring assembly, one endof said body including an openable end gate and the opposite end portion of said body having an upstanding transverse partition disposed therein between said side walls and guidingly-engaged with the body for movement toward and away from said one end thereof, said body including motor means drivingly connected to said partition for selectively shifting the latter longitudinally of said body, said flooring assembly including a'flooring plate assembly secured over a plurality of longitudinally spaced transverse beams, said receptacle including a pair of transversely spaced longitudinal frame beams over which said transverse beams extend and to which the latter are secured, said motor means comprising a multi-stage hydraulic cylinder including a base section secured longitudinally through and to a lower transverse center portion of 'said partition, and a transverse horizontal anchor assembly supported in the other end of said body above the flooring assembly, and longitudinally spaced pairs of opposite side upstanding anchor members having their lower ends rigidly anchored to the opposite sides of each of said longitudinal frame beams below said flooring assembly, the upper ends of said anchor members projecting upwardly through said flooring assembly and rigidly anchored to said transverse horizontal anchor assembly, the free extendable end of said hydraulic cylinder being secured to said anchor assembly.

8. A load body defining an upwardly opening-elongated receptacle having first and second ends and consisting of an elongated flooring assembly and a pair of opposite side upstanding side walls extending along and projecting upwardly from opposite side marginal edge portions of said flooring assembly, one end of said body including an openable end gate and the opposite end portion of said body having an upstanding transverse partition disposed therein between said side walls and guidingly engaged with the body for movement toward and away from said one end thereof, said body including motor means drivingly connected to said partition for selectively shifting the latter longitudinally of said body, said motor means comprising a multi-stage hydraulic cylinder including a base section secured longitudinally through and to a lowertransverse center portion of said partition, and an anchor assembly supported from the other end of said body and to which the free extendable end of said hydraulic cylinder is secured, said side walls including longitudinally extending'guideway defining means spaced appreciably above said flooring assembly, said partition including followers guidingly engaged in said guideway defining means for movement therealong and against lateral inward movement relative to said guideway defining means, said guideway defining means also including lower opposite side tracks carried by said side walls,,said partition including a supporting carriage including front and rear pairs of opposite side rollers rollingly engaged in said tracks, one pair of said front and rear pairs of opposite side rollers being supported from said support carriage for adjustable vertical shifting relative thereto.

9. A'load body defining an upwardly opening elongated receptacle having first and second ends and consisting of an elongated flooring assembly and a pair of opposite side upstanding side walls extending along and projecting upwardly from opposite side marginal edge portions of said flooring assembly, one end of said body including an openable end gate and the opposite end portion of said body having an upstanding transverse partition disposed therein between said side walls and guidingly engaged with the body for movement toward and away from said one end thereof, said body including motor means drivingly connected to said partition for selectively shifting the latter longitudinally of said body, said side walls including longitudinally extending guideway defining means spaced appreciably above said flooring assembly, said partition including followers guidingly engaged in said guideway defining means for movement therealong and against lateral inward movement relative to said guideway defining means, said guideway defining means also including lower opposite side tracks carried by said side walls, said partition including a supporting carriage having front and rear pairs of opposite side rollers rollingly engaged in said tracks, one pair of said front and rear pairs of opposite side rollers being supported from said support carriage for adjustable vertical shifting relative thereto.

Claims

1. A load body defining an upwardly opening elongated receptacle having first and second ends and consisting of an elongated flooring assembly and a pair of opposiTe side upstanding side walls extending along and projecting upwardly from opposite side marginal edge portions of said flooring assembly, one end of said body including an openable end gate and the opposite end portion of said body having an upstanding transverse partition disposed therein between said side walls and guidingly engaged with the body for movement toward and away from said one end thereof, said body including motor means drivingly connected to said partition for selectively shifting the latter longitudinally of said body, said side walls including longitudinally extending guideway defining means spaced appreciably above said flooring assembly, said partition including followers guidingly engaged in said guideway defining means for movement therealong and against lateral inward movement relative to said guideway defining means, said followers being supported from said partition for limited movement horizontally along the partition transversely of said body, and force means operatively connected between said partition and said followers yieldingly biasing said followers inwardly toward each other.

2. The combination of claim 1 wherein said side walls include longitudinally spaced upstanding hollow reinforcing posts with internal stiffeners projecting downwardly below the corresponding side marginal portions of said flooring assembly, the lower end portions of said stiffeners projecting below said flooring assembly being braced relative to the adjacent underside portions of the corresponding side marginal portions of said flooring assembly.

4. The combination of claim 3 wherein said stiffeners comprise I-beam members.

5. The combination of claim 1 wherein said flooring assembly includes a flooring plate assembly secured over a plurality of longitudinally spaced transverse beams, said side walls including longitudinally spaced upstanding hollow reinforcing posts with internal stiffeners projecting downwardly below the corresponding side marginal portions of said flooring plate assembly and the adjacent ends of at least some of said transverse beams, and brace means secured between the lower end portions of said stiffeners and the underside portions of said some transverse beams of said flooring assembly, said brace means including transverse upstanding gusset plates secured to the underside surface portions of said transverse beams and the inner side portions of the lower ends of said stiffeners projecting below said transverse beams.

6. The combination of claim 1 wherein said motor means comprises a multi-stage hydraulic cylinder including a base end section secured longitudinally through and to a lower transverse center portion of said partition, a transverse horizontal anchor assembly supported in the other end of said body above said flooring assembly, the free extendable end of said cylinder being secured to said transverse horizontal anchor assembly, said multi-stage hydraulic cylinder including at least three relatively telescoped extendable sections, a guide carriage disposed between said partition and said anchor assembly, said guide carriage also including followers guidingly engaged in said guideway defining means, an intermediate section of said relatively telescoped extendable hydraulic cylinder sections being supported from said guide carriage against lateral deflection in all directions perpendicular to the centerline of said hydraulic cylinder.

7. A load body defining an upwardly opening elongated receptacle having first and second ends and consisting of an elongated flooring assembly and a pair of opposite side upstanding side walls extending along and projecting upWardly from opposite side marginal edge portions of said flooring assembly, one end of said body including an openable end gate and the opposite end portion of said body having an upstanding transverse partition disposed therein between said side walls and guidingly engaged with the body for movement toward and away from said one end thereof, said body including motor means drivingly connected to said partition for selectively shifting the latter longitudinally of said body, said flooring assembly including a flooring plate assembly secured over a plurality of longitudinally spaced transverse beams, said receptacle including a pair of transversely spaced longitudinal frame beams over which said transverse beams extend and to which the latter are secured, said motor means comprising a multi-stage hydraulic cylinder including a base section secured longitudinally through and to a lower transverse center portion of said partition, and a transverse horizontal anchor assembly supported in the other end of said body above the flooring assembly, and longitudinally spaced pairs of opposite side upstanding anchor members having their lower ends rigidly anchored to the opposite sides of each of said longitudinal frame beams below said flooring assembly, the upper ends of said anchor members projecting upwardly through said flooring assembly and rigidly anchored to said transverse horizontal anchor assembly, the free extendable end of said hydraulic cylinder being secured to said anchor assembly.

8. A load body defining an upwardly opening elongated receptacle having first and second ends and consisting of an elongated flooring assembly and a pair of opposite side upstanding side walls extending along and projecting upwardly from opposite side marginal edge portions of said flooring assembly, one end of said body including an openable end gate and the opposite end portion of said body having an upstanding transverse partition disposed therein between said side walls and guidingly engaged with the body for movement toward and away from said one end thereof, said body including motor means drivingly connected to said partition for selectively shifting the latter longitudinally of said body, said motor means comprising a multi-stage hydraulic cylinder including a base section secured longitudinally through and to a lower transverse center portion of said partition, and an anchor assembly supported from the other end of said body and to which the free extendable end of said hydraulic cylinder is secured, said side walls including longitudinally extending guideway defining means spaced appreciably above said flooring assembly, said partition including followers guidingly engaged in said guideway defining means for movement therealong and against lateral inward movement relative to said guideway defining means, said guideway defining means also including lower opposite side tracks carried by said side walls, said partition including a supporting carriage including front and rear pairs of opposite side rollers rollingly engaged in said tracks, one pair of said front and rear pairs of opposite side rollers being supported from said support carriage for adjustable vertical shifting relative thereto.

9. A load body defining an upwardly opening elongated receptacle having first and second ends and consisting of an elongated flooring assembly and a pair of opposite side upstanding side walls extending along and projecting upwardly from opposite side marginal edge portions of said flooring assembly, one end of said body including an openable end gate and the opposite end portion of said body having an upstanding transverse partition disposed therein between said side walls and guidingly engaged with the body for movement toward and away from said one end thereof, said body including motor means drivingly connected to said partition for selectively shifting the latter longitudinally of said body, said side walls including longitudinally extending guideway defining means spaced appreciably above said Flooring assembly, said partition including followers guidingly engaged in said guideway defining means for movement therealong and against lateral inward movement relative to said guideway defining means, said guideway defining means also including lower opposite side tracks carried by said side walls, said partition including a supporting carriage having front and rear pairs of opposite side rollers rollingly engaged in said tracks, one pair of said front and rear pairs of opposite side rollers being supported from said support carriage for adjustable vertical shifting relative thereto.