US2082978A - Joint holder and edging unit - Google Patents

Description

June 8, 1937; R. RVRoBERTsoN 2,082,978

J..1 HOLDER AND EDGING UNIT Filed Nov. 14, 1955 v s sheets-sheet 1 il I lJune 85,1937. R. RvRoBhl-:RTso'N l 2,082,978 n N NG NIT FiledNov; 14, 1935 s sheets-sheet 2 R. R. ROBERTSON JOINT HOLDER AND EDGING UNIT June 8, 1937.

Filed Nov. 14, 1955 3 Sheets-Sheet 3 irme 8, 1937 PATENT OFFICE JOINT 'Homan AND EDGmG UNIT Robert It. Robertson, Chicago, Ill., assigner to The Translode Joint' Company, Chicago, Ill., a corporation of Illinois Application November 14. 1935. Serial No. 49,695

' 21 claims. (ci. :a4-5i) In the construction of concrete roads and the like. it has been the practice to provide expansion joints at spaced intervals, said joints being formed by means of expansion joint forming f 5 mechanisms, parts of which are left in they concrete, and other parts of which are removed after the pouring of the concrete. During the pouring of the concrete, diiiiculties have been encountered in holding the expansion joint forming l -mechanisms in'their proper positions on the road subgrade, due to the fact that as the concrete is poured and pushed into position. the expansion joint mechanisms have either been pushed out of place or tipped over, thereby requiring replacel ment 'of the joint forming mechanisms and re-` positioning o! the same, causing loss of time and i additional expense,

The present invention has been devised to obviate the dimculties hereinbeiore encountered in holding expansion joint forming mechanisms in position during `the pouring of concrete. The present invention relates more particularly to a combination expansion joint holder and edging unit for use in connection with a load transmission expansion joint forming mechanism, including a precast plastic core or filler having an asphalt top seal or head secured across the-top thereof into which the tapered pins of a steel edging bar are adapted to be pressed, after which the edging bar is enclosed by means of a protecting hood or cap forming part oi the joint holding mechanisms, which are removable before the last pass of the road nnishing machine to permit proper rounding or edging of the upper edges of the concrete slabs andremoval of the edging bar and pins after the initial set of the concrete.

It is an object of this invention to provide an improved removable joint holder for holding an expansion joint forming unit in position during thepouring of concrete in the formation of a.

road or the like.

It is also an object of this invention to provide i. narrow removable edging unit for removable engagement on the upper surface of a plastic joint filler, and beneath a protecting cap forming part of a joint holder used for holding the joint forming mechanism in position during the pouring of concrete. and removable from the concrete While it is still soit, thereby exposing the edging unit to permit rounding or edging of the upper corners of the concrete slabs, allowing the edging unit to be removed after the initial set of the concrete to provide a void above the plastic iiller forming the joint for the reception of a compound filler for filling the top of the iinished joint.

It is a further object of this invention to provide a removable narrow edging unit for positioning upon the top of a transload joint forming mechanism to provide anarrow crack between the adjacent upper portions o f concrete road slabs above the expansion joint mechanismsA to be yfilled with a compound ller to form a plastic closure for the topof the joint, which is comparatively narrow when compared with the width of the expansion joint mechanisms separating the road slabs beneath the topl ller.

It is furthermore an object of this invention to provide a load transmission expansion joint unit including a plastic core provided' with a metal cross plate or a wide plastic head or a combinaby means of concrete pouring and finishing machines.

It is an important object of this invention to provide a joint holder and edging unit for use in the construction of concrete roads and the like, with said holder formed to permit the same to be removed before the last pass of the concrete finishing machine, to uncover a narrow edging unit releasably supported on the top of the expansion joint filler core to permit rounding or edging of the upper edges of adjacent concrete slabs, to form a narrow crack for the recept-ion of a compound ller above the plastic ller core of an expansion joint formed between the concrete road slabs. j

Other and further important objects of this invention will be aparent from the disclosures in the specification and the accompanying drawings.

The-invention (in a preferred form) is illustrated in the drawings and hereinafter more fully described.

On the drawings:

Figure' 1 is a. fragmentary top plan view oi' a load transmission expansion joint forming mechanism including a removable edging unit and a section taken on line II-II of Figure 1, showing the concrete road slabs in position for embedding the expansion joint mechanisms and the edging and holding units before the last pass of the finishing machine, and while the concrete is still soft to permit removal f the joint holder.

Figure 3 is a similar fragmentary cross section ofthe expansion joint illustrated in Figure 2 after the removal of the joint holder, butv with the edging unit still in position upon the top of the joint filler to facilitate edging of the upper edges of the concrete slabs, prior to the initial set of the concrete when the edging unit is removed to provide a narrow crack above the expansion joint illler and between the upper portions of the adjacent road slabs.

Figure 4 is a fragmentary vertical section through the upper portion of the. finished ex- -pansion joint after the removal of the edging unit, and after a compound flller has been poured into the narrow top 'crack of the joint above the wide head of the main ller forming part of the expansion joint.

Figure 5 is a fragmentary vertical section similar to that illustrated in Figure 2 of the upper portion of a modified form of core unit provided with a metal plate cross head between the plastic core and the metal edging unit.

Figure 6 is a fragmentary isometric view of the metal cross head plate, of the type shown in Figure 5, removed from the joint.

Figure 7 is a fragmentary vertical section through the upper portion of an expansion joint core and edging unit having engaged therebetween another modiiied form of a metal cross head for a joint.

Figure 8 is a fragmentary isometric view of the upper portion of the core and metal cross head illustrated in Figure 'l showing the wedging pins in section.

Figure 9 is an enlargedfragmentary isometric sectional view of another modified form of expansion joint forming mechanism wherein a grooved metal cross head plate is engaged between the top of the plastic core and a plastic cross head on which the edging unit is supported.

Figure 10 is a fragmentary isometric sectional view of another modiiied form of expansion joint forming mechanism in which another modified form of a cap type metal cross head is engaged on the top of the joint forming core for the support of the edging unit.

As shown on the drawings:

The. present invention relates to an improved road expansion joint forming mechanism, of the l load transmission type, and includes a removable edging unit and a joint holder serving the double purpose of enclosing the edging unit during the Ypouring of concrete, and also acting as a brace for supporting the expansion joint forming mechanism in place during the pouring of the concrete to form road slabs on opposite sides of the joint.

In the present showing, the reference numeral I indicates a road subgrade upon which con'crete is deposited to form the concrete road slabs 2 separated from one another by means of the improved load transmission expansion joint and mechanism. The improved metal edging unit and the joint holder form subcombinations ofthe joint forming mechanisms, which include in combination a load transmission base unit which carries a filler or core unit upon which the edging, the base unit of the joint comprises an elongated base member consisting of a solid base plate 3 constructed of sheet metal or other suitable material. 'I'he longitudinal margins of the base plate 3 are bent .upwardly and then inwardly toward one another to form oppositely positioned guide channels. 4. The guide channels 4 of the base unit provide oppositely positioned guide grooves 5. 'Ihe margins vof the top plates of the guide channels 4 are bent upwardly and are cut away to provide spaced upwardly projecting retaining flanges 6, which are arranged in staggered relation on opposite sides of the base unit. Notches are provided between the retaining flanges 6 on each side of the base unit to per-l mit load transmitting anchor shoes or holders to be seated therein in proper spaced relation for the support of a core unit or illler hereinafter more fully described.

The load transmitting ldevices associated with the base unit consist-of a plurality of anchor shoes or holders, which are movably or shiftably engaged in the base section and are arranged longitudinally in offset or staggered relation with right flange or web 8 integral with the base flange. Struck outwardly from the upper margin of each of the upright flanges or webs 8. are anchoring blades or wings 9 leaving the inner side of the upright flange or web iiat.

Supported on the base anges 'I of the anchor shoes between the upright flanges or webs 8 is a pre-molded asphalt ller or core board I havingstaggered rows of bosses or knobs II and sockets or recesses I2 formed on each side thereof. Seated upon the top edge of the plastic filler I0, and secured thereto bymeans of nails is a top seal -in the form of a plastic ller head I3 constructed of asphalt or a similar material. Metal core plates I6 are provided on opposite sides of the ller I0 in contact with the outer surfaces of the knobs or bosses II. The plates II- project' down into the base unit adjacent the inner faces of the upright flanges 8 of the anchor shoes. The upper margins of the plates I6 are bentinto the form of angle strips I5 which seat against the lower side corners of the illler crosshead I3 to close the top of the illler chamber in which the core or ller Il! is disposed.

Disposed longitudinally upon the illler head lI3 midway between the sides thereof is a. removable steel edging bar IB having rigidly secured in spaced openings in the bottom surface thereof of a row of tapered pins or pegs I'I which are adapted to be pressed or forced into the plastic illler head- I3 by pushing the edging bar into position upon the top surface of the head I3 as illustrated in Figure 2. The edging bar I6 isl removable for reuseand as clearly illustrated in Figures 2 and 3 is comparatively narrow in order to provide a narrow top groove or crack I8 between the upper portions of the concrete slabs I.

During the pouring of the concrete, the edging bar I6 is inclosed by means of a. long hood or cap I9 of substantially horseshoe shaped crosssection as shown in Figure 2. The channel cap I9 when is use is positioned with the open bottom thereof seated upon the top surface of the illler head I3 and forms part of a joint holder which upwardly out of engagement with the filler head is used for the purpose of securely bracing the joint `forming mechanisms in position during the pouring of concrete. The joint holder includes the channel cap I9 which has secured to one side thereof a plurality of spaced angle brackets 20 each of which is provided ,with an lopening or hole near the outer end thereof. Welded or otherwise secured to the bottom of each of the angle brackets 20 is an inclined brace or supporting leg 2i of a length sulcient to permit the lower end to rest upon the top of, one of the guide channels 4 forming part of the load transmission base unit. Also welded or, otherwise secured to the bottom of each of the angle brackets 20 is an angle stop bracket 22, one flange of which projects downwardly to serve as a stop for engagement against one side of the filler head I3.

yRemovably projecting downwardly through the opening in each of the angle brackets 20 is an anchoring stake' 23, the lower end of which is provided with a tapered tip 24 to permit the stake to be driven into the subgrade I. Secured in the upper end of each of the stakes 23 is an outwardly projecting arm or handle 25 to facilitate removal of the stakes after the pouring of concrete and before the last pass of the flnishing machine. The handles 25 also prevent the stakes 23 from being driven through the brackets 2li.

yAfterl the expansion joint forming mechanisms are positioned 'upon the subgrade as illustrated in Figure 2 and the stakes 23 are driven into the subgrade to hold the joint forming mechanisms braced in position on the side opposite the side against which the concrete is adapted to be deposited by a concrete machine, concrete is deposited by the concrete furnishingy machine and as the machine advances toward the joint forming mechanisms the concrete is pushed into position and over the top of the joint into the space on the opposite side oi the joint where the joint holder is positioned. The joint holder actsto brace the joint forming mechanisms in position and also serves to hold the cap upon the top of `Lhc ller head I3 to inclose the edging bar I6. After the concrete has been poured to embed the joint forming mechanisms including the cap I9 and the joint holder, the stakes 23 are removed by means of the handles 25 and the main portion of the joint holder is pulled upwardly out ,of the soit concrete together with the cap I9.

The removal of the cap I9 and the joint holder is done before the last pass of the concrete iinishing machine.

With the removal of the cap I3 and the joint holder. the concrete which is Still soft fills the voids left by removal of the cap I9 and the joint holder. The removal of the cap I9 exposes the edging bar I6 to permit the soft concrete to extrude against the opposite sides of said bar. After thc initial set of the concrete, the upper corners of the concrete slabs I on opposite sides of the bar I6 are edged or rounded as illustrated in Figure 3. When the edging is completed, the edging bar I6 together with the pins II is pulled I3 to leave a narrow crack or groove i8 between the top portions of the concrete slabs above the top seal or head I3 of the joint. The top groove or crack I8 is now lled to a point near the top surface of the concrete, with a compound filler, such as tar or the like, to form a narrow plastic filler or top rib 26 to seal the top o1 the joint above the top seal or head I3.

The removed edging bar I6 and the joint holder are adapted to be repeatedly reused for the purpose of securely bracing load transmission expansion joint forming mechanisms in position during the pouring of concrete, with the edging bar I6 inclosed by the cap I9 during the pouring of concrete and later on serving as a means for edging the upper corners of the concrete slabs and for forming a narrow top crack or groove above the joint for the reception of a compound filler to seal the top of the joint.

In the modified form of the device illustrated in Figures and 6, the parts which are identical with those illustrated in Figures l to 4 inclusive are designated with like numerals. In this modified formof the filler mechanism, the reference numeral 26 indicates a precast plastic core board, the lower edge of which is adapted to be seated in a load transmission base similar to the type illustrated in Figure 2, or if preferred the plastic core board may be seated upon any other suitable type of joint forming base. Seated upon the top surface of the plastic core board 2t is a metal crosshead consisting of two overlappin'g metal plates 27 the outer margins of which are bent downwardly and inwardly 4to form stiiening beads or hems 28. The crosshead plates 27 are provided with openings 29 in the overlapping margins thereof to permit the pins I'i of the edging bar I6 to be projected downwardly through said openings into the plastic filler board 26. The metal crosshead plates 2l are preferably formed of rolled copper and are provided with a series of openings 30 adjacent the rolled margins thereof as clearly illustrated in Figure v6. 'Ihe openings 30 are adapted to be filled with concrete and together with the rolled margins 28 of said copper plates serve as a means for anchoring the plates in the opposite concrete road slabs 2. 'I'he upper portion of the joint is adapted to be completed after the removal of the cap I3 and the holder mechanism and after the edging bar I 6 together with the pins II have been removed to leave the narrow space at the top of the joint to be filled with a compound filler similar to the arrangement i1- lustrated in Figure 4.

Figures 7 and 8 illustrate another modified form of expansion joint core unit comprising a precast asphalt core board 3| provided with a central top groove 32 which extends throughout the entire length of the core board. Seated upon the top of the plastic core board 3| is a metal crosshead or upper joint seal comprising two rolled copper plates 33 the outer longitudinal edges of which are rolled downwardly to provide reinforcing feet or margins 36 while the inner longitudinal margins of the copper plates 33 are deflected downwardly to form flanges 35 which project downwardly into the topmiddle groove 32 of the core board 3|. WThe copper plates 33 are provided with openings 36 for the reception of concrete to assist in anchoring the plates 33 in the concrete road slabs 2. Seated upon the top of the copper plates 33 is a steel edging bar I6 provided with downwardly projecting pins I'I which wedgingly project downwardly between the flanges 35 ofthe copper plates 33 and into the plasticmaterial forming the core board 3|.

Figure 9 illustrates another modified form of an expansion joint former comprising a precast asphalt core board 31 provided with `a longitudinally disposed middle top groove at 38.

Seated upon the top of the core board 31 is a. copper crosshead plate 39, the margins of which are rolled over to form reinforcing rims or beads ed. The margins of the plate 39 are provided with concrete receiving apertures di. The cen- Seated upon the top of the copper plate 39 is a precast. asphalt top seal or crosshead bart3 which is adapted to be secured in place by means lo of nails dd or other suitable means which are driven downwardly through the bar and the copper plate 39 and into the core `board 31. The pins il of the edging bar are adapted to be driven or forced downwardlyl into the` plastic. crosshead bar d3 to removably hold the edging bar I6 in position.

Figure 10 illustrates another modified form of an expansion joint forming unit' includingin combination a precast asphalt core board i@ similar to the core board' illustrated in Figures 1 to 4 inclusive, having metal core plates d5 positioned on opposite sides thereof in contact with the bosses ii. Seated upon the top of the core board i0 is a copper crosshead plate t6 the middle portion of which is formed to provide a channel 4l which fits over the upper portion of the core board. The outer margins. of the 'copper crosshead plate de are turned. downwardly and inwardly to form reinforcing ribs or margins I8.A The top of the channel portion 61 of the crosshead member. is provided with spaced apertures for the reception of the pins il of a steel yedging bar le.

' The various forms of expansion void forming mechanisms illustratedv in Figures 5 to 10 inclusive are adapted to be used in combination with a. load transmission plate mechanism similar to that illustrated in Figures 2 and 3 or with any other suitable type of joint forming base which will close the bottom of the expansion joint. y y

In actual practice the base unit with the core forming mechanism seated thereon and having the removable metal edging bars mounted in place are assembled and are wired or secured the joint forming mechanism are shipped separately and are adapted to be readily engaged in position with the cap I 9 disposed over the edging bar after which the stakes 23 are driven intoy the subgrade as illustrated in Figure 2 to holdthe joint forming mechanism properly braced in position to permit the pouring of con` crete without disturbing the position 'of the joint formingl mechanism.

It will of course be understood that various details of construction may be varied through a wide range without departing from the principles of'this invention and it is therefore not the purpose to limit the patent granted hereon otherwise than necessitated by the scope of the appendedclaims.

I claim as my invention:

1. In a joint formingmechanism for embedding between concrete sections of a road vthe combination with an expansion joint base, of a preformed core supportedthereon and` including a top seal head, plates secured on opposite sides of the plasticfiller and supported by said base with the topsof said plates formed to seat around the bottom corners of the top seal head, an

l75 edging bar including pins to be driven into the be embedded in concrete. The bracing units forv top seal head to hold the edging bar removably secured in. place upon the top seal head, and a joint holder for bracing the joint forming mechanism in place and including a cap forv enclosingthe edging bar, apertured brackets secured to the cap, legs secured to the apertured brackets and braced against the base, stop members on the brackets engaged against the vtop seal head, stakesprojecting through the apertured brackets and driven into the road subgrade to hold the joint forming mechanism braced in position during the pouring of concrete, and handles on the stakes for removing the same and the joint holder after the pouring of con.

crete.

2; In a road joint forming mechanism for embedding between concrete road slabs upon the road subgrade the combination of an expansion joint base, of a precast filler .supported thereon, a preformed top seal head of plastic material seated upon the top of the filler, plates supported on the base and engaged against opposite sides of the iiller and said top seal head, an edging bar including stakes which are driveninto the top seal head for holding the edging bar removably secured in position, a joint'holderpositioned 'against one side of the base and the iiller and including a cap for inclosing the -removable edging bar, and means for securing the joint holder in position to brace the joint forming mechanisms including. the j'oint holder cap in position during the pouring of concrete for the formation of the road slabs between which the joint is A form-ed.

3. In an expansion joint forming mechanism including a preformed plastic-lier, the combination of an edging bar including pins driven into the plastic iiller for holding the edging bar in place, a joint holder including a'cap removably erigaged on the top of the plastic filler for enclosing the edging bar, bracket means for holding the cap in position, and securing stakes engaged with the bracket means and releasably driven into the road subgrade for bracing the joint forming mechanism in position during the pouring of concrete to form road slabs;

4. The combination with a concrete' road expansion joint forming mechanism including a. preformed plastic filler, of a metal edging bar, of less thickness than the iiller and seated on edge thereon leaving strips of the top of the ller exposed to be covered by concrete and pins secured in the edging bar and driven into the precast ller for releasably holding the edging bar in position to permit edging of the concrete slabs forming part of the concrete road after the initial set of the concrete and before the removal of the edging bar and the pins to form a narrow crack above the precast ller for the purpose of receiving a top filling to seal the top of the joint.

5. In an expansion joint forming mechanism including a precast plastic ller, of an edging unit comprising a metal edging bar, and pins secured therein to be driven into the plastic filler for holding the edging bar on edge spaced inwardly away from the uppercorners of the in position on edge and spaced inwardly away from the top corner edges of the ller to facilimetal edging bar seated on edge upon the precast nller,.and pins secured to the edging bar and projecting into the precast ller for holding the edging bar in position with the sides thereof spaced inwardly away from the top corner edges of the filler.

8. The combination with a precast plastic filler for a road joint, of an edging bar of less thickness than the filler and supported on edge thereon, and pins forming a part of the edging bar and driven into the plastic iiller for holding the bar in place leaving parts oi' the top surface of the filler exposed on opposite sides of the bar.

9. An expansion` joint brace mechanism comprising a channel cap, a plurality of brackets se` cured to one side thereof, stop members secured to said brackets, legs on said brackets for supporting the same in position, and removable stake members engaged with the brackets for reieasably securing the joint holder in place.

l0. An expansion joint holder comprisinga cap, apertured brackets secured to one side ci the cap, stop members secured to the brackets, legs on the bottoms of the brackets, and stake members projecting through the brackets and including handles for the removal of the stakes to permit removal of the joint holder from concrete poured on opposite sides of the joint. Y

11. Thc combination with an expansion joint forming mechanism for embedding between concrete road slabs, of a joint holder for said mechanism including'a channel cap, apertured brackets secured to the cap, legs for bracing the brackets in position, stakes releasably projecting through the apertured brackets, and handles projecting from the upper portions of the stakes to facilitate removal of Athe stakes from the brackets and also serving to prevent the stakes from being driven completely through the brackets.

12. The combination with a precast plastic expansion joint filler for embedding in concrete for the formation of a joint between concrete road slabs, of a.. narrow steel edging bar including tapered pins to be driven into the precast ller to hold the edging bar in position, and a joint `holder for bracing the precast ller in position during the pouring of concrete and comprising a channel shaped cap for seating upon the top of the precast filler to enclose the steel 'edging bar, apertured brackets secured to one side of the cap, stop members on the bottoms of the brackets for engaging against one side of the plastic iiller to brace the same, supporting legs formed on the bottoms of the brackets, stakes projecting through the apertured brackets adapted to be driven into a road subgrade to secure the joint holder in place for bracing the cap and the pre-k cast filler in place during the pouring of con-- crete, and armsprojecting from the stakes above the brackets for removing the stakes after the completion of the joint and also serving to prevent the stakes from being driven through the apertured brackets.

13. In an expansion joint forming mechanism including a precast plastic iller, of an apertured crosshead -plate supported on top of the filler, a

, 5 steel edging bar including pins projecting from the bottom thereof to be driven through the plate and into the plastic ller for' holding the edging bar and plate in position during the formation of 4a joint.

14. The combination with a precast plastic expansion joint filler for embedding in concrete for the formation of a joint between concrete road slabs, of an apertured 'metal plate means seated upon the top of the ller, and a steel edgingbar seated on the plate means and having pins projecting through the plate means and into l the precast ller.

15. The combination with a precast plastic expansion joint ller for embedding in concrete for the formation of a jointy between concrete road slabs, of an apertured metal plate crosshead seated upon the top of the ller and projecting' beyond the sides thereof, a steel edging bar seated upon the apertured crosshead, and Wedge pins projecting from the edging bar and projecting through aperturesdn the crosshead to engage in the precast ller.

16. 'Ihe combination with a precast plastic expansion joint ller for embedding in concrete for the formation of a joint between concrete road slabs, of an apertured metal plate crosshead seated upon the top of the filler and projecting beyond the sides thereof. a steel edging bar seated upon the apertured crosshead, wedge pins projecting from the edging bar and projecting through apertures in the crosshead to engage in the precast filler, a cap engaged over the edging bar and seated on the crosshead and brace members connected with the cap for temporarily holding the same `in position during the pouring of concrete for the formation of the joint.

17. The combination with a precast plastic expansion joint nller for embedding in concrete vfor ythe formation of a joint between concrete road slabs, of an apertured metal crosshead plate seated upon the filler and projecting beyond the sides thereof. a precast plastic bar seated on the plate, a steel edging bar supported upon the pre-- cast plastic bar, and wedge pins secured in the steel edging bar and projecting into the plastic br to releasably hold the steel edging bar in pos ion.

18. The combination with a precast plastic expansion joint iiller for embedding in concrete for the formation of a joint between concrete road slabs, of an apertured metal crosshead plate seated upon the iiller and projecting beyond the sides thereof, a precast plastic lbar seated on the plate, a steel edging bar supported upon the precast plastic bar, wedge pinsk secured in the steel edging bar and projecting into the plastic bar to releasably hold the steel edging bar in position, a cap seated over the edging bar and resting on the precast plastic bar, brace members secured to one side 'ofthe cap, and removable stakes for engaging the brace members to hold the same in position during the pouring o! concrete for the formation of the joint.` j

19. The combination with a precast plastic expansion joint iiller for embedding in concrete for the formation of a joint between concrete road slabs, of apair of apertured overlapping crosshead plates seated upon the ller, an edging bar seated on the crosshead plates, and Wedge pins secured in the edging bar and projecting through the apertured overlapping crosshead plates into the plastic ller.

20. The combination of a precast plastic expansion joint filler for embedding in 'concrete for tic 311er.

21. The combination with a, e: plastic expension joint Eller for embed in concrete for the formation of a joint` between concrete road slabs, of` a. plurality of epertured crosshead plates seated upon the ller and including enges which `project downwardly into the filler, an edging bar Seated on the cr my.. plates, and wedge members eecured in'vthe edging bar and projecting e downwardly between the enges of the cead plates into the ntic ller. A BRT R. ROBERN.

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