US1749101A - Combination concrete-mixer turntable and subgrader - Google Patents

Description

March 4, 1930. J. w. 'HELTZEL 1,749,101 COMBINATION coucnfi'rn MIXER TURNTABLE AND snack/mm Filed July 27, 1925 2 Sheets-Sheet 1 QM w March 4, 1930. J. w. HELTZEL 1,749,101

COMBINATION CONCRETE MIXER TURNTABLE AND SUBGRADER Filed July 27, 1925 2 Sheets-Sheet 2 a2 o 43 v //i. j. 4,26 i u u 14k; a; y 29 Patented Mar. 4, 1930 NITED STATES PATIENT OFFICE eosnrn WILLIAM nnmznn, or WARREN, OHIO COMBINATION CONCRETE-MIXER TURNTABLE AND SUBGRALDEB Application filed m 27,

v '10 advance of the concrete mixer, so that trucks used forhauling the sand, gravel, cement and other material can be run onto the turntable and then turned around to bring their rear ends toward the mixer for conveniently dumping the material, as well as turning the truck around so that it can move away con- 'veniently after being emptied. The use of such turntables, although a convenience as compared with the non-use of such turntables,

10 has been found to be of disadvantage in several respects. Thus, the advancing movement of the turntable involves labor and time. It is also usually necessary to position the turntable a distance in advance of the concrete mixer, so that the trucks, after being turned around, have to be backed up from the turntable to the mixer, thus requiring the trucks to move over the turntable in going to and leaving the mixer, resulting in delays. In some cases the trucks in leaving the concrete mixer pass to one side of the turntable, and when the space for the passage of the trucks is narrow it has happened that the side forms or rails have been displaced.

With the present device, the turntable is associated with the concrete mixer, and is disposed immediately in front thereof, so that the trucks dump the materials directly into the skip or receiver of the mixer, and the turntable is also moved forwardly with the mixer. Furthermore, the turntable is supported from the side forms or rails when be- 1ng moved with the mixer, and is supported on the ground or sub-base when in. position to receive the trucks thereon. By such arrangement the objections ,to turntables heretofore used are overcome, and several advantages are gained.

Another object of the invention is to combine with the turntable, means for finishing 1925. semi No. 46,423.

-the sub-base as the turntable is moved forwardly with the concrete mixer, so as to smooth over any depressions or irregularities in the surface of-the sub-base caused by the trucks moving thereover to and from the turntable.

.With the fore oing and other objects in view, which will e apparent as the description proceeds, the invention resides in the construction and arrangement of parts as hereinafter described and claimed, it being understood that changes can be made within the scope of what is claimed, without departing from the spirit of the invention.

The invention is illustrated in the accompanying drawings, wherein Figure 1 is a side elevation of the turntable and concrete mixer, with a truck on the turntable, the near side form or rail being removed.

Fig. 2 is an enlarged side elevation of the turntable showing the base thereof raised from the sub-base of the road.

Fig. 3 is aplan view of the turntable.

' Fig. 4 is a front view thereof.

Fig. 5 is an enlarged sectional detail on the line 55 of Fig. 3.

A base 10 is provided which is of suitable size,'being rectangular in shape and preferably constructed of structural steel. Said base or frame comprises the front and rear beams 11 and 12', respectively, and the longitudinal side beams 13. The beams 13 are connected by cross beams 14 which are in turn connected by beams 15, and a circular track 16 is secured to and located between. the beams 14 and '15. The track 16 has a hub 17 connected to the track .by spokes 18, and the V hub receives a king pin 19.

The turntable proper, hereinafter referred -to as the turntable platform, has the parthe latform for free turning'movement on the ase. The axles of the wheels 24 are journaled in bearings 25 secured on, the members 23. The runways 21 are sufliciently wide and long so that different makes of trucks may be run onto the turntable. 7

Rollers 26 are mounted on the beams 11 and 12 to support the ends of the runways 21 when said runways are in longitudinal position, thereby preventing the ends of the runways from being depressed when the truck runs onto and off the turntable. This will prevent the turntable platform from tilting on the base when the truck moves on and off the platform.

Approaches 27 are hinged, as at 28-, to the front beam 11, and are also preferably of channel iron, and their forward lower ends are widened and are adapted to rest on the ground or sub-base. The forward ends of the runways 21 register with said approaches, so that the truck may readily move up and down the approaches on and off the platform.

The base 10 rests on the sub-base or ground 7 when the turntable is in position to receive the trucksther'eon and the turntable is supported from the side forms or rails 34 when the-turntable is moved.' The side forms or rails 34 define the opposite edges of the road under construction, the concrete being I poured and finished off between said-forms or rails, as well known. In order to. support the base 10 from the rails. 34, secondary transverse beams 29 are provided at the front and rear corners of the base 10 and extend across the rails 34, the inner ends of said j beams being hingedly connected, as at 3O,

with the beams 11 and 12.- Transverse rods or axles 31 are held b brackets 32 secured to the beams 29, said ro s extending transversescrewin ly over the rails 34, and flanged wheels 33 are rotatable and slidable on said'rods and roll on the rails 34. Raising and lowering screws 35 are screw-threaded through upstandin yqkes or members 36 secured to the ends 0 the beams 11 and 12, and said screws bear downwardly on the beams 29 between the ends of said beams 29, whereby said beams. 29 provide levers to sup ort, the base or frame 10, from the whee s 33. Thus, by the screws 35 'downwardl the member 36 are raised, which will raise the base 10, and the beams or levers 29 will tilt slightly, the inner ends of. the beams 29 being raised with the base 10 andthe ends of the beams 11 and 12 moving toward the beams 29. In this way the base 10 is raised oil the sub-base or ground, to support the structure from the rails. 34, so that the device maybe readily moved lengthwise of the roadway on the. rails. When the turntable haa been positioned, the screws 35 are rotated so asto screw upwardly in the members 36, and this will let the base 10 down on the ground or sub-base so that when a truck moves onto the turntable, the weight of the truck will be transmitted to the ground or sub-base with out subjecting the rails or forms 34 to excessive strains, such as would be the case if the weight of the turntable and truck were im-,

rods 37 limit the separation of the beams 29 i and base 10, and the nuts 37 may be adjusted on the rods 37 in order to regulate the amount that the base 10 can move away from the s beams 29. I In order to prevent lateral movement of the turntable on the rails 34, especially when w the turntable isbeing moved over the subbase, rollersor wheels 38 are provided to contact with the inner sides of the' forms or rails 34, and said rollers 38 are carried by brackets 39 which are secured to the beams 29. Said brackets 39 are preferably adjustable longitudinally of the beams 29. so that the rollers.

38 maybe adjusted for roads of diherent widths. It is also apparent that the wheels 33 are adjustable longitgdinally on the rods 1 or axles 31 toadjust-the turntable for roads may be adjustable longitudinally on the beams 29, and that the hinges30 may also'be adjusted longitudinally of the beams 11 and province of a skilled 41 of the concrete. mixer..

.95 of different widths, and that the brackets 32 cured to the rear beam 12v and extend rear wardly. These barsmay be attadhed to the body or ame ofthe concrete mixer 42 so that the turntable will move forwardly and rearwardly with the mixer, or said bars may be so arranged as to abut the body or frame of the mixer so that the mixer pushes the turntable forwardly, without any direct connection between theturntable and mixer. The device is also used. for giving the subba'se'a final. finish immediately in advance of the concrete mixer, so as to smooth 01f the surface of the sub-base, especially when said surface, after being finished off in advance of the concrete mixer and turntable in the usual way, istor'njup or damaged by thewheels of the trucks moving to and from the turntable.

to the front beam 11 and depends slightly from the bottom of said beam. Said lade enters the sub-base when the base 10 is let down on the ground, but does not materially injure the sub-base and merely cuts a transverse slot in the surface. When the base '10 is lifted off the sub-base, the blade 44 will then be in position, as seen in Fig. 2, to scrape the surface of the sub-base when the turn-' table is moved forwardly so as to smooth off the surface.

Scarifier teeth 45 are disposed in front of the scraperblade 44, in order that said blade can more effectively "smooth the surface of the sub-base. Thus, as the turntable is advanced with the concrete mixer, it will smooth and finish the surface of the sub-base, and thereby eliminate wheel tracks and other irregularities in the surface of the sub-base. The present turntable facilitates the work in the construction of the road. Thus, the trucks can be moved quickly to and from the concrete mixer. When a loaded truckapproaches the turntable, the front wheels of the truck pass over the approaches 27 onto the runways 21, and the rear wheels of the truck can then move'over the approaches onto the runways. The truck is then quickly turned around so that the rear end thereof is 4o brought adjacent to the concrete mixer,and

' the material may then be quickly dumped directly into the skip or receiver 41 of the concrete mixer, as seen in Fig. 1. The truck may then move forwardly off the turntable, 45 and the next truck may then be moved on the turntable. No time is lost, as compared with methods heretofore used, the number of trucks in a fleet may be reduced, inasmuch as no backing ofthe trucks is necessary, and the trucks may be moved on and off the turntable in quick succession. Also, when the concrete mixer is moved forwardly the turntable will move with the mixer, so as to lose no appreciable amount of time in changing the posito operate the screws 35 to raise the base 10 off the ground when the turntable is moved, and to turn said screws to let the base 10 down on the ground again after the concrete mixer and turntable have been advanced the desired distance. The approaches 27may be swung upwardly off the sub-base while the turntable is being advanced.

Having thus described the invention, what is claimed as new is:-

tion of the turntable, it only being necessary 1. A turntable comprising, in combination with side rails for defining the edges of a road under construction, a base between said rails, a turntable platform on the base, and supporting means mounted on said rails and adjustably connected with the base for raising the base to support it from said means and for lowering the base to let it down on the ground.

2. A turntable comprising, in combination with the side rails for defining the edges of a road under construction, a base between the rails, a turntable platform on the base, wheels on the rails, and means adjustably connecting said wheels with the base for raising and lowering the base so as to support the base from said wheels when the base I is raised and to let the base down on the ground.

3. A turntable comprising, in combination with the side rails for defining the edges of aroad under construction, a base between the rails, a turntable platform on the base, members hingedly connected with the base and extending over said rails, wheels connected with said members and movable on said rails,

and adjusting means connecting said members and base for raising and lowering the ase.

4. A turntable comprising a base adaptedto be disposed between the side rails between which a road is constructed, a turntable platform thereon, members-adjustably connected with the base and extending to opposite sides thereof to extend over said rails, and means carried by said members movable on said rails.

5. A turntable comprising a base adapted to be disposed between the side rails between which a road is constructed, a turntable platform thereon, members adjustably connected with the base and extending to opposite sides thereof to extend over said rails, rods carried by said members to extend across said rails, wheels slidable and rotatableon said rods to move on said rails,

and means carried by said members to engage the rails and prevent transverse displacement of said base and members.

6. A turntable comprising'wheels to roll on the side rails defining the side edges of a road under construction, a base adapted to be disposed between said rails and connected to said wheels for up and down movement OE and on the ground, and a turntable platform mounted on said base. I

In testimony whereof I hereunto afiix m signature.

JOSEPH WILLIAM HELTZEL.

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