US2193879A

US2193879A - Concrete block machine

Info

Publication number: US2193879A
Application number: US207555A
Authority: US
Inventors: Muenzer Frank Xavier
Original assignee: MULTIPLEX CONCRETE MACHINERY C
Current assignee: MULTIPLEX CONCRETE MACHINERY C; MULTIPLEX CONCRETE MACHINERY Co
Priority date: 1938-05-12
Filing date: 1938-05-12
Publication date: 1940-03-19
Anticipated expiration: 1957-03-19

Description

March 19, 1940. F. x. Mui-:NZER 2,193,879

CONCRETE B LOCKYMVACHINE Filed May 12v, 1938 3 Shets-Sheef l atten/muje March 19, 1940.

, F. x. MUENZER CONCRETE BLOCK MACHINE Filed May 12., 1938 l 1 vu on to@ Ham? X27 V//1 Mae/7 ger March 19, 1940. F. x. MuENz-:R

CONCRETE BLOCK MACHINE Filed May 12,4 1958 3 Shets-Sheet 3 Hwy/7A' Xa Vier Mae/75er Patented Mar. 19, 1940 UNITED STATES PATENT OFFICE CONCRETE BLOCK MACHINE Application May 12, 1938, Serial N0. 207,555

2 Claims.

In machines of this type heretofore used, the troweling means, so far as I am aware, continuously operates during the block forming operations which include pressing, tamping, vibrating l or jolting the material in the mold. It has been found in practice that there are objections to troweling the blocks during the forming period, and particularly so when only one side of a block is troweled, as troweling in such cases causes the block to slump, and the vibration from the torming operation will deilect a side of the block due to one side being more compact than the other.

The primary object of my invention is the provision of means to perform the troweling operation on either one or both sides of a block after it has been completely formed, that is, after the pressing, tamping, jolting or vibration operation, thereby obviating the troubles and objections which occur when the forming and troweling operations are simultaneous.

A further object of the invention is the provision in a machine of the character described, of a troweling means which is controlled in its operation by the block take-off means, and is autog5 matically operable, during a predetermined movement of the control for such means, to eiect a troweling of a formed block, which troweling preferably takes place during the raising or stripping movement of a block.

Other objects and advantages of the invention will be apparent from the following description, and from the accompanying drawings, illustrating one embodiment of the invention, and in Which- Figure l is a perspective elevation of a concrete block forming machine embodying the invention. with parts broken away and with the block shown partly raised, the machine being of a well-known type; Fig. 2 is an enlarged section on the line 2 2 n in Fig. l, with the take-off control arm shown by full lines in inoperative position and in dotted lines as partially moved to block take-off position and in position for effecting automatic operation of the troweling means; Fig. 3 is a section 5 on the line 3-3 in Fig. 2; Fig. 4 is a fragmentary side elevation, with parts broken away and with the block partly raised and the control arm moved to initial troweling" position; Fig. 5 is a fragmentary view somewhat similar to Fig. 4, with the block completely raised and the control arm moved to the limit of its inward stroke, and Fig. 6 is a diagram of the electrical wiring for the troweling means.

Referring to the drawings. I designates the u block mold having the opposed end plates 2, 2,

and the opposed

interior side plates

3, 3, which are the block troweling members of the troweling means embodying the present invention. The mold I is supported by a suitable frame work 4 and may include core members 5, as well under- 8 stood in the art. A block formed by the mold is designated 6 and during the molding, stripping and take-off operations rests on a pallet "I, as is common in the use of machines of this character.

The stripping or raising mechanism for a 19 formed'block includes a set of four or more stripper pins l, which are disposed vertically below the mold and when raised engage the bottom of the pallet 1 and raise it therewith-to block take-off or removing position. This stripping means is l common to machines of this character and may be of the hand or power type, as desired and as well understood in the art.

The troweling means in which the present invention resides includes the opposed side trowel- 20

ing plates

3, 3, which are replaceably carried by the web portions of U-shaped or channel strips I0 which extend lengthwise of the mold at the respective sides thereof with their channels facing outwardly. These channeled carriers for the 25 plates 3 are each guided by upper and lower sets of rolls II, respectively, which are carried on respective studs projecting horizontally from the side portions of the mold frame work with the top set of rolls engaging under the top flange and the lower set of rolls engaging over the lower flange of the respective carrier, as best shown in Fig. 4. 'I'he channel form of the strips I0 is important as imparting strength and rigidity thereto.

'I'he outward sliding thrust of each troweling 85 strip I0 is borne by a set of cooperating slide bars I2, one being carried by the strip I0 and the other by the respective side of the mold frame I, as best shown in Figs. 1, 2 and 4. These bars, in the present instance, have V mating portions.

'Ihe carrier members IIl at one end, left in the present instance, are connected by a cross shaft I5, which is connected at opposite ends thereof by pitmans I6 to respective cams l1 on a cross shaft I 8 yjournaled in brackets I9 extending, in the present instance, from a frame upright 20 of the machine. A sprocket wheel 2l is mounted on the shaft Il at one end and is connected by a sprocket chain 22 to a small sprocket wheel 22 on the shaft of an electric motor 24. T'he motor is 60 in circuit with and controlled by a switch 25 (Fig. 6), which is located in a switch box 21 on the frame part 4.

. The block take-oi! arm Il, which is of a type commonly used in machines of this character, is Il tion, as shown by i'ull lines in Fig. 2 and in Fig. 4,.

the switch is open. When, however, the arm 33 has been swung inward a short distance from such l inward position, and before the main block supporting finger 36 has moved under the pallet of a raised block; the cam 33 will coact with the switch control to move the switch to closed position. which will be maintained during the complete inward movement of the arm 30 and until it has been moved outward to near its neutral position. It is customary to provide a main block supporting finger 36 and one or more shorter fingers -31 which, upon an inward swinging of the take-off arm, will pass under a raised pallet, and upon an outward swinging of the arm carry the pallet and supported block to take-off position, as well understood in the art.

It is apparent with this manner of control for the troweling means that the take-offA arm 30 may be moved inwardly sufficiently to close the switch 25 at any stage in the block forming or stripping' operations. It is preferable, however, to permit a block to be completely formed before starting the troweling means and then to start the troweling operation either before effecting a raising or stripping movement of the block, or during such movement, depending on the extent of troweling desired. It is also apparent that a block may be troweled on one side only, which is modifications and changes without departing from the spirit of the claims.

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

l. A machine of the type set forth, includingtroweling means, means to mount the troweling meansfor troweling movements, take-off means, including a rotatable shaft means to mount the take-off means for movement to a position underlying the pallet of the block, means to actuate the troweling means, and means carried by the shaft and associated with the take-oi means whereby upon partial movement of the latter preparatory to its final operative position, vthe actuating means of the troweling means will be rendered operative and upon continued movement the take-off means will itself be moved to operative position to underlie the pallet.

2. A machine as set forth in claim l, wherein the rotatable shaft of the take-olf means is substantially vertically disposed and has take-off members thereon, and wherein the shaft has a Y cam associated therewith whereby upon partial turning of the shaft the cam will effect operation of the actuating means of the troweling means. FRANK XAVIER MUENZER.

CERTUPICATEV 0F CORRECTION. Patent No. 2,195,879. v March 19, 19m.

FRANK XAVIER MUENZER.

It is hereby certified that error appears in the printed specification of the above numbered patent requiring .correction as follows age l, first column 'before line l, insert the follwing paragraph This invention-relates to machines formaking concrete block,

and particularly to those of the block troweling type..

and that the said Letters Patent should be read v-vith this correction therein that the same may conform to the record of the case in the Patent Office.

Signed and sealed this 9th day-of April, A. D. l9l0.

Henry Van Arsdale, (Seal) Acting Comissioner of Patents.