US1891731A - Machine for constructing concrete pipe - Google Patents

Description

Dec.. 20, 1932. -w SCHULTZ. 1,891,731

MACHINE FOR CONSTRUCTING CONCRETE PIPE Filed March 24, 1950 I F2 9% Z. I I 1 I I I I 27 2a I l ea 3.9 30 a l a 5 as I I 11 E4 Q 10 O Q I I y 8 ///3 J I ll g2 .23 14 62 mi 34. 13 i INVENTOR ATTORN EY Patented Dec. 20, 1932 UNITED v STATES PATENT, OFFICE ALFRED W. SCHULTZ, ,OF WATER-LOO, IOWA, ASSIGNOR TO ZEIDLEB CONCRETE PRODUCTS MACHINERY COMPANY, OF, ST. JOSEPH, MISSOURI MACHINE non oons'rnnc'rrne ooivoanrn PIPE Application filed March 24, 1930. Serial No; 438,486;

My invention relates to improvements in machines for constructing concrete pipe, and particularly for making bell-end pipe sections of mixed finer and coarser concrete-materials, and the object of my improvement is to supply a machine for this purpose available for imparting to the bell end terminations of a concrete pipe section'enhanced resisting hardness where most subject to wear 0 and shock breakage.

This invention also constitutes improvements upon my device for the same purpose shown and described in my pendin application for United States Patent, 289,682, filed July 2, 1928.

I have accomplished the object of this invention by the mechanism which is herein after described and claimed, and which is illustrated in the accompanying drawing, in

so which Fig. 1 is a central vertical longitudinal section of a tile mold and of the supports therefor together with the. mechanism within the mold for forming a concrete tile, and other and associated mechanism for imparting to the bell end parts of the mold slight s erial No.

tapping vibrations for the purpose above specified. Fig. 2 is a top plan of the rotary table of the vibrating mechanism only.

Minor modifications may be effected in the so mechanisms exemplified herein without departing from my invention.

The numeral 23 denotes a substantially cylindrical mold casing the lower end part 24: H of which is enlarged for the shaping of a tile bell end therein. Within this lower part 24 is inserted a concentrically spaced annular pallet with raised central hollow part 25 resting upon a flat annular plate 26 which latter closes the bell end part of the mold 23.

so The numeral 27 denotes a rotatable shaft having mounted on its lower diminished end 28 a cylindrical former head 32, the latter having a smaller upper extension 31 provided with opposite slotted wings 29 upon which 4 are removably secured the curvate and outwardly grooved troweling bodies which terminate as far outwardly diametrically as the former head.

The shaft .27, as is well known to those 5 skilled in the art, is movable to and fro centrallyand longitudinally through the mold 23 by mechanism not shown, and simultaneously while in rotation induced by said mechanism. The former head 32 and the connected troweling bodies 30 therefore move through 5; and closely spaced from the inner walls of the raised pallet part 25 central opening. Fig.1

shows the positions of these elements when the former head 32 has first been moved downwardly through the mold casing and is about to reverse its direction of longitudinal movement to start up rotatingly through the mold, as the flowable mixture of finer and coarser concrete materials is being introduced into the mold at the top for de- 5 position in the bell end 24 upon the pallet base plate and pallet. 1

The means for supporting said mold 23 are a basal member 1 upon which is fitted an an nular angle body 2. This body 2 supports a [plurality of superposed progressively diminishing annular plates 4, 6, 8 and 9, of which the uppermost are thicker than those below, the whole thus forming a stepped cone of low height and concentric with the lower part of the former head 32 when'the latter is in its lowered position. These stepped annular plates are removably supported on said annular rim body 2 and connected respectively thereto and to each other in turn inwardly so by bolts 3, 5, and 7 the annular plate 8 only having opposite vertical apertures 10 for a purpose tobe described. 1

The former head 32 is continued below by a downwardly forked cylindrical body 34 '85 mounted removably upon the downwardly projecting and threaded termination 33 of the V shaft part 28. v

The numeral 21 denotes a hollow bearing apertured with the basal member 1 to receive rotatably a short vertical shaft 19 alined with and below the shaft part 28. On'the lower end'of the shaft-19 is a nut 22. Upon the member 1 is a ball-bearing 18 including a depending cylindrical body 17 rotatably stepped thereon and forming part of a circular horizontal table 16.

The upper part of the shaft 19 projects centrally above the table 16 and is receivable into the interspace of the furcations of the body 34, and the shaft has oppositely projecting parts 20 which engage the furcations, so that when the shaft 27 is in rotation, the shaft part 19 is by said means rotated in the same direction together with said table 16. The

table 16 has one or more oblong apertures to be traversed by one or more rollers 141 as the case may be, which have their pintles rotatably mounted in bearing sockets in spaced pairs of depending hangers 15 secured upon the under face of the table. The rollers project a slight distance above the top of the table.

The numeral 12 denotes a pair of like tappets which reciprocatingly traverse the bearing holes 10 in the annular plate 8. The lower parts of the tappets have depending furcations between which are mounted smaller rollers 13 in a diametrical position over the table 16 to ride upon and across the lower rollers 14 during eachrotation of the table 16. The upper end parts of the tappet bodies 12 are provided with interiorly threaded hollowed seats for the headed and threaded pins 11, so that the pins may be adjusted toward and from the platen base plate 26 against which they rise and impinge once during each rotation of the table 16.

The hollow concrete tile is formed within and next to the inner wall of the mold 23 and its bell end 24 while the former head 32 is rotating and moving upwardly through the mold. In Fig. 1 the lower part of the. mold including the entire bell end thereof are shown filled with the flowable -miXture of finer and coarser concrete materials, which may be cement, sand, and broken stone in desired proportions. During this operation of forming the tile, the mechanism above described which operates the tappets 11, in rotating the table 16 causes the tappets in succession to tap lightly but sufliciently upon the pallet part 26. This causes a separation of the more fiowable finer cement particles from the coarser materials in the bottom part of the bell end 24, as is indicated in Fig. 1 by the variations in the sectioning of the concrete in its superposed zones 0, b and a, the bell end termination of the tile being almost purely cement, which later hardens and is more resistant to wear and blows than the more porous parts of the tile at b and a. The stepped plates are removable.

Having described my invention, what I claim as new, and desire to secure by Letters Patent, is:

1. The combination with a mold and a rotary packer head within it to shape a concrete body from a mixture of flowable finer and coarser concrete materials, of a rotary table associated with and spaced from the basal termination of the mold and having a roller mounted eccentrically relative to the table center, an adjustable sectional tappet supported in the interspace of the table and said basal termination and having a roller mounted upon its lower end to ride across the roller on said table during each rotation of the table to lift the tappet and cause it to tape said basal termination to jar the contents thereof, causing the settling of the finer cementitious material below the coarser material of the concrete while the concrete body is being shaped within said mold.

2. The combination with a mold to shape a concrete body from a mixture of fiowable finer and coarser concrete materials, of a relatively fixed vertically eccentrically apertured supporting plate upon which the basal termination of the mold is supported in spaced relation, a tappet seated movably in the apertureof said plate to impinge at times at its upper end with said basal termination, said tappet being formed of adjustably con-- nected sections, the lower section being forked with a roller rotatably mounted between its furcations, and a rotary member below said tappet having a rotatable roller thereon adapted to ride under the tappet roller once during each rotation of the memher to actuate the tappet in knocking the said basal termination intermittently to vibrate the concrete contents of the latter while the concrete body is being formed within said mold.

In testimony whereof I a-fliX my si nature.

ALFRED W. SCH LTZ.

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