US3495510A

US3495510A - Slip form paver with slip form release and seal

Info

Publication number: US3495510A
Application number: US757448A
Authority: US
Inventors: Michael I Hudis
Original assignee: Rex Chainbelt Inc
Current assignee: Rex Chainbelt Inc; Rexworks Inc
Priority date: 1968-09-04
Filing date: 1968-09-04
Publication date: 1970-02-17
Anticipated expiration: 1987-02-17

Description

Feb. 17,1970

l. HUDIS 3,495,510

SLIP FORM PAVER WITH SLIP FORM RELEASE AND SEAL Filed Sept. 4, 1968 FIGI 2 Sheets-Sheet 1 INVENTOR MICHAEL I. HUDIS 2 L, fi-ffial M I BY A f k ATTORNEW M. l. HUDiS Feb. 17, 1970 SLIPFORM PAVER WITH .SLIP FORM RELEASE AND SEAL :2 Sheets-Sheet 2 Filed Sept. 4-. 1968 INVENTOR MICHAEL HUDIS XWIW My FIG. 5

Z; s m g momms United States Patent O 3,495,510 SLIP FORM PAVER WITH SLIP FORM RELEASE AND SEAL Michael I. Hudis, Brookfield, Wis., assignor to Rex Chainbelt Inc., Milwaukee, Wis., a corporation of Wisconsin Continuation-impart of application Ser. No. 568,262, July 27, 1966. This application Sept. 4, 1968, Ser. No. 757,448

Int. Cl. E01c 19/48 U.S. CI. 94-46 7 Claims ABSTRACT OF THE DISCLOSURE A slip form concrete road paving machine includes slip forms movably mounted to side frames for parallel movement and power actuating means therefor. An elongated flexible seal connects the slip form to the side frame from the front of the slip form back to a concrete spreading mechanism and protects the slip form mounting linkage by keeping concrete from spilling over the top of the slip form. The power means includes two sets of power cylinders, one generally vertical and the other generally horizontal to move the slip form both vertically and horizontally away from a slab forming position.

CROSS REFERENCE TO RELATED APPLICATIONS This application is a continuation-in-part of prior application Serial No. 568,262, filed July 27, 1966 now Patent No. 3,421,418, Slip Form Paver With Slip Form Release.

BACKGROUND OF THE INVENTION Field of the invention This invention relates to improvements in slip form concrete pavers and especially to mounting of slip forms and seals therefor.

Prior art Slip form concrete pavers are road making machines that move over the path of a road bed to lay a concrete road and carry forms to form and define the sides of the concrete pavement of the road. As the machine moves these forms slip along the side of the pavement and no permanent forms are necessary. Slip form pavers may carry a variety of tools to level the concrete to the top of the forms, vibrate the concrete, screed or smooth the concrete surface, and finish the upper surface of the road. Slip form paving machines are themselves known in the art as shown for example by the patents to Perkins et al., 2,869,931, 2,976,783 and 2,976,784.

It is also known in the art of slip form pavers to adjust the form so that the width of the slab to be poured and confined may be adjusted and to readily move the slip forms laterally clear of the concrete while still on the machine at the termination of a days paving so that the headers will not adhere to the concrete while it sets overnight.

The prior art, however, leaves much to be desired in that the known concrete headers pivot about a vertical axis for movement and the vertical axis must be at the front of the machine causing a complicated arrangement.

Furthermore, the mechanism for moving the slip forms and the linkage for connecting the slip forms to the side frames for movement is exposed to concrete which will on occasion flow over the top of the slip forms during movement of the slip form paver. Concrete in the linkage of the slip forms, of course fouls the linkage, and when set causes the linkage to break. The concrete also causes problems if it gets in the power mechanism for operating or adjusting the position of the slip forms.

3 ,495 ,5 l0 Patented Feb. 17, 1970 It is also desirable in the art to have slip forms which not only move outwardrelative to each other and the center line of a concrete pavement but also move upwardly to clear bridge abutments and the like. Such were not found in the prior art.

SUMMARY OF THE INVENTION This invention provides a slip form paver with movable slip forms which move outwardly relative to each other in the center of the pavement in a parallel manner and which can also move upwardly with regard to the road bed simultaneously with the outward movement to further clear the pavement and to clear any other abutments. In order to prevent concrete from fouling a linkage mechanism mounting the movable slip forms an elongated flexible seal is provided from near the front of the slip forms back to the concrete spreading mechanism of the slip form paver. The seal may be in the form of an elongated flexible boot attached to the side frame at a point above the top of the slip form and to the top and back of the slip form. Power means in the form of sets of horizontal and vertical cylinders are connected to the side frame and to the slip form to move the slip form either vertically, horizontally or in both directions away from the side of the concrete slab.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a top plan view of a portion of a slip form paver including one side embodying the movable slip form and seal of this invention.

FIG. 2 is a side elevation view looking from the outside of the slip form paver.

FIG. 3 is a transverse sectional view taken on line 3-3 of FIG. 1.

FIG. 4 is a transverse sectional view taken on line 44 of FIG. 1.

FIG. 5 is a detail elevational view of the front of a slip form looking from the inside of the road bed outwardly with portions broken away for the sake of clarity.

FIG. 6 is a detail plan view of an elongated flexible seal.

DESCRIPTION OF PREFERRED EMBODIMENT Referring to the drawing, a slip form paver 10 is of the type well known in the art includes a side frame 12 on each side of the machine which is connected by transverse frame and the paver carries concrete spreader means 14 of a known type. The paver 10 moves on endless tracks (not shown) carried by each side frame as is well known in the art.

Each side frame 12 carries an elongated slip face form 16 for forming a side face of a concrete slab C. Since both side frames are identical only one has been shown and described in the drawings. Face form 16 is mounted from side frame 12 by mounting means 18 allowing it to move with both horizontal and vertical movements of components as can be seen by comparing FIGS. 3 and 4. Power means 20 are provided for powering the movement of the face form 16. A seal means in the form of an elongated flexible seal 22 is provided for sealing between the side frame 12 and the slip form 16 to prevent concrete from spilling over the top of the slip form and fouling or breaking the mounting means 18 and power means 20. The slip form may have forwardly extending nose plate 24.

The side frame 12 may include a side beam 26 having secured thereto an elongated rail 28 which mounts a pair of power cylinder supports 30.

The elongated slip face form 16 has a smooth inside face 32 for forming the edge of the concrete slab and is provided with a strengthening backing channel 34 as well as a plurality of vertical ribs 36. As shown in sections 3 and 4, the front end of the elongated face form v has a height significantly greater than the lower end of the face form following the concrete spreader means 14.

The mounting means 18 includes a lug 38 secured to rail 28 and a plurality of pivot links 40. The pivot links have

pivots

42 and 44 for pivoting the respective ends to lugs 38 and upper ends 46 of ribs 36.

The power means 20 includes a set of vertical cylinders 48 (there being two in the embodiment shown) and a set of generally horizontal cylinders 50 (there being 5 in the embodiment shown). Each vertical cylinder 48 has its piston rod connected to the back of the face form on pivot axis 52 and the cylinder pivotally connected to an adjustable eye bolt 54. Each horizontal cylinder 50 has its piston rod provided with a pivotal yoke 56 connected to the ribs 36, and its cylinder is pivotally connected to a lug 58 on the side beam 26. The side beam is provided with a slot 60 for the piston rod of cylinder 50 to extend through.

The elongated flexible seal 22 is formed as a flexible member 62 of the seal belting /2 inch thick, for example. The belting has a cutout 64 to accommodate the cylinder support 30 and a plurality of pockets 6,6 to accommodate the tops 46 of ribs 36 as shown in FIG. 5. In addition, a plurality of rivet or bolt holes 68 are provided for securing one side of the flexible belting to the top and back of the face form 16 and the other side of the top of rail 28 from a point near the forward end of the face form as shown in FIG. 5 to a rear point at least back to the concrete spreader mechanism 14 as shown in FIG. 1.

The nose plate 24 may have a rigid connection '70 to the front of the face form to move therewith and a transverse bracing 72 for stiffening purposes.

It is believed that the operation of the construction will be apparent from the foregoing but a brief rsum will now be given. For forming the side of a concrete slab C the

cylinders

48 and 50 are extended to place the face form 16 in the position of FIG. 3. As some of the concrete between the face form in the slip form paver in ordinary operation would tend to go over the top of the slip form, seal 22 prevents concrete from fouling up linkage 18 or the power means 20. At the end of a days operation, or when reaching a bridge abutment, or otherwise when it is desirable to move the slip form upwardly or outwardly, the appropriate set of

cylinders

48 or 50, or both, are energized by an operator through suitable hydraulic connections of a known type to move the slip form on its pivotal linkage 40 to the position of FIG. 4 or any other position allowed by the linkage and power means to clear the sides of the concrete slab and any other formed or said abutments such as bridge abutments and the like.

While the invention has been particularly shown and described with reference to preferred embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention.

What is claimed is:

1. In a slip form concrete road paving machine of the type adapted to move over a road bed and having spaced side frames and a concrete spreader means, and slip face forms carried by the side frames, means mounting at least one of the slip face forms for movement generally parallel to a longitudinal axis of the side frame, power means connected to the movably mounted slip form for powering movement thereof into and out of position to function as a face form, with improvements comprising an elongated flexible seal member connected between the slip face form and the side frame, the seal member extending from at least the front of the slip face form over a portion of the power means and the mounting .means positioned between the front of the slip face form and the concrete spreader means.

2. A slip form paver as in claim 1 wherein the mounting means includes a pivotal linkage connecting the top of the slip face form to the side frame for movement parallel to a longitudinal axis of the side frame.

3. A slip form paver as in claim 2 wherein the power means includes at least two power cylinders, one generally horizontal and one generally vertical disposed with one end of each power cylinder connected to the side face form and the other end of the power cylinder connected to the side frame.

4. A slip form paver as in claim 3 further comprising an adjustable mounting arrangement for the end of the power cylinder connected to the side frame.

5. A slip paver as in claim 4 further comprising a pivotal connection of the other end of the power cylinder to the slip form along a single horizontal pivotal axis.

6. A slip form paver as in claim 5 wherein there is a set of horizontal and a set of vertical cylinders.

7. A slip form paver as in claim 3 wherein the elongated flexible seal member has one edge connected to the top and back of the slip form and the other edge connected to the side frame at a point above the horizontal level of the top of the slip form.

References Cited UNITED STATES PATENTS 2,976,783 3/1961 Perkins 94 46 X 2,993,257 7/1961 Perkins 94 46 X 3,015,260 1/1962 Pelsue 94-46 3,234,861 2/1966 Appel 9446 3,257,917 6/1966 Lewis 9446 X 3,347,139 10/1967 Perkins 9446X 3,354,801 11/1967 Hanson 9446 3,421,418 1/1969 Hudis 94-46 NHJE C. BYERS, In, Primary Examiner