US2818629A - Forms for concrete structures - Google Patents

Description

Jam,y 7, 1958 A. G. w. WEDBERG FoRMs RoR CONCRETE STRUCTURES 'Filed Aug. 17. 1954 reim@ j l III /NVE/v TOR wiiinited States Patent rai FORMS FOR CONCRETE STRUCTURES Axel G. W. Wedberg, Hagersten, Stockholm, Sweden Application August 17, 1954, Serial No. 450,348

7 Claims. (Cl. 25-131) My invention relates to improvements in forms for erecting structures of concrete or similar plastic materials, so as to produce straight and even surfaces such that no plastering will be required.

I pro-pose to provide an improved form, which includes a series of panels of relatively small weight in comparison to surcial area. The panels are locked together at their edges by simple and effective means operating to retain them in a flush and aligned relation, and to provide for expeditious assembling of the panels when setting them up or taking them down.

The panel construction provides a knock-down feature, not requiring any welded connections in the panel frames, so that the panels may be easily assembled, and taken apart for repair or renewal of parts. Then, too, the panels are properly shaped and reenforced to keep their molding surfaces fiat and unwarped, and the front edges of the panels are made to protect the edges of the molding plates.

Further objects and advantages of my invention will more fully appear from the following detailed description taken in connection with the accompanying drawing which illustrates several embodiments thereof, and in which:

Fig. l is a rear elevation of a wall panel with a fragmentary portion of an adjacent panel and the associated clamping mechanism;

Fig. 2 is an enlarged sectional view taken on the line 2 2 of Fig. l, looking in the direction indicated by the arrows;

Fig. 3 is a horizontal fragmentary sectional view of two adjoining wall panels, taken on the line 3 3 of Fig. l, looking in the direction indicated by arrows;

Fig. 4 is a vertical fragmentary section taken on the line 4-4 of Fig. 3, looking in the direction indicated by the arrows; and

Fig. 5 is a horizontal fragmentary sectional view of side member for a filler panel.

The forms are identically the same for both sides of a wall. Therefore, it is believed the drawings and description for one side will suice for both sides.

Referring now to the drawings in detail, like reference numerals designate similar parts through the several views. Now first, I shall :describe in detail the panel, which may abe used for both walls and ceilings. The panel l as shown in Figs. l, 2 and 3, comprises a molding plate 2, which may be of plywood or other suitable material fastened to the wooden cleats 3. The ends 8 of cleats 3 are wedge shaped to conform with the side members 5, which are bent on an incline 6 so that together with the flange 7 they form pockets for receiving the ends 8 of the cleats 3. The front edges of the side members 5 extend outwardly to form supports 9 for the edges of the molding plate and are then bent at right angles to form metal edges 10 for protecting the edges of the mol-ding plate. The side members 5 are tied together against the ends 8 of each cleat 3 by a tie-bar 4 2,813,629 Patented Jan. 7, 1958 riceA disposed along such cleat and extending over the rear edge 11 of the cleat 3 and along opposite faces of such cleat and through the side members 5 where the tie-bar 4 is tighted by nuts 12. The tie-bar 4 serves to hold the side members 5 in position and also acts to produce a reenforcing or trussing effect on the corresponding cleat 3. Since the cleats 3 are disposed in a slanting direction across the panel with the tie-bars 4 fastened to the side members 5 at opposite sides of the cleats 3, the cleats are prevented from moving sidewise, thereby being wedged in place. A U-shaped lug 13 is welded onto each end of each side member 5. 'Ihese lugs 13 form pockets for receiving and holding the ends of the upper and lower cleats i4 severally in place. The side members 5 are provided with slots 15 through which extend the wall ties 25. The molding plate 2 may be made up of two laminations or sheets are shown of which laminations the bottom one is preferably a stiff board or the like, serving the purpose of supporting a thin molding plate 21 which presents a suitable molding surface. The molding plate 21 is fastened to the plate 2d or to cleats 3 by small nails 22, so when the exposed surface is worn out the molding plate can easily be reversed. Thus both sides thereof can be used, or the molding plate may be replaced by a new one.

Figs. l, 3 and 4 show two adjoining wall panels. A wall tie 25 is also shown for :connecting the panels of one wall form with those of the adjacent wall form. As the panels on both such wall forms are identical I have only shown the complete panels for one wall form. The wall ties 25 and locking wedge 26 as shown are conventional clarnping devices. To obtain a perfect alignment of the molding surfaces at the joints of adjoining panels, holding brackets 27 each having two legs 40 and 41 have been provided. Each of these is positioned over a walll tie 25 and guided by the same and between the rear edges 28 of the side members 5. Thus such bracket 27 is held in position at right angles to the molding surface so that when the clamping wedge 26 is put in place and driven tight the adjoining edge portions 10 are pressed into alignment between the metal washer 29 on the wall tie 25, and front edge 30 of the holding bracket 27, the rear portion of the holding bracket 27 being provided with two arms 31 and 32 which engage the rear flanges 7 of the side members 5.

In Fig. 5 I have shown the cross section of a side member for a filler panel, which may be used to fill up small spaces of special sizes between standard panels. In this case the member 5 is replaced by a metal section 5 identical with the corresponding side member 5 of the panel 1 shown in Fig. 2, except that the U shaped lug 13 has been eliminated. Then said metal section 5 has fastened to its inside face a wood strip 33 to which a molding plate 2 may be nailed as shown at 34.

While I have herein shown and described only certain embodiments of the features of my present invention, still I do not intend to limit myself thereto except as I may do so in the claims.

I claim:

l. In a form for concrete construction, a pair of adjoining panels, each having a front edge and a rear edge, said front edges being in close contact and provided with slots through each of which a wall tie is passed, a holding bracket positioned over said wall tie, the rear edges of said panels being spaced apart to lock the holding bracket against sidewise movement between both rear edges of said panel to hold the same perpendicular to the molding surface, the rear end of said holding bracket being formed with arms engaging the rear fianges of said panels.

2. In a form for concrete construction, a pair of adjoining panels, each having a front edge and a rear edge, said front edges being in close contact and provided with slots through each of which a wall tie is passed, a holding bracket having two legs of which a leg is positioned on each side of said wall tie and bears against the back of both adjoining panel edges, the rear portion of said holding bracket being held in position against sidewise movement between the rear edges of said adjoining panels, a wedge positioned on the end of the wall tie, the front surfaces ofv said holding bracket being forced into parallel relation to the molding surface against the edges of said panels and the rear portion of said holding bracket being formed with arms engaging the rear flanges of said panels.

3. In a form for concrete construction, a panel comprising a molding plate supported by side members, cross cleats and tie-bars extending between said side members, said side members being shaped to form longitudinally wedge shaped pockets to receive the end portions of said cross cleats which end portions are complementary to said pockets, each cross cleat having a length greater than the distance between said side members and being mounted to form an obtuse angle at each end to the adjacent side member, each tie-bar being located adjacent to, the corresponding cleat and having its central portion extending over the cleat and its two end portions adjacent to the opposite faces of such cleat, and means to secure such tie-bar end portions to the proximate side members adjacent to the apices of said obtuse angles to thereby lock saidI cleat in its position between said side members.

4. In a form for concrete construction, a panel comprising a molding plate supported by side members, cross cleats. and tie-bars extending between said side members, each side member being provided with wedge shaped pockets to. receive the end portions of said cross cleats which end portions are complementary to the wedge shaped pockets, each cross cleat having a length greater than the distance between said side members and each end f such cross cleat and the proximate portion of the side member being of form to provide an obtuse angle between such end of the cross cleat and the proximate side member, each tie-bar having its central portion extendingI over the cleat and its two end portions adjacent to the opposite faces of such cleat, and means to secure such tie-bar end portions to the proximate side members adjacent to the apices of said obtuse angles to thereby lock said, cross cleat in position between said side bars.

In a form for concrete construction, a panel compriising a molding plate supported by side members, cross cleats, and tie-bars extending between said side members, each side member being of Z-shaped cross section and one arm of such` Zk comprising a supporting element supporting the proximate edge of said molding plate, the central portion of such Z extending rearwardly at an obtuse` angle to the molding plate and the other arm of such Z extending at an acutev angle to the body Iof such Z to establish a, longitudinally extending wedge shaped pocket to receive the end portions of said cross cleats, said cleat end portions being complementary to such wedge shaped pocket, each tie-bar having its central portion extending over the corresponding cleat and with its ends at opposite faces of such cleat and locking such cleat iti-position between said side members, together with means to secure the end portions of each tie-bar to the proximate side members, said securing means including tiebar tensioning means.

6. In a form for concrete construction, a pair of adjoining molding panels lying substantially in the same plane, the edge portions of lsaid panels being in close proximity to each other and provided with companion notches registering with each other, a side member of Z-shaped cross section extending along each of said proximate panel edges and having one of its arms extending outwardly from the body of such Z-shaped member and constituting a panel edge support for such panel, to thereby establish an obtuse angle of the body of such Z-shaped member with respect to such panel, each such Z-shaped member having its other arm extending inwardly from said body and parallel to such panel and separated from such panel, the acute angle portions of the said other arms of said Z-shaped members being separated from each other, a T-shaped holding bracket having its stem portion extending forwardly between said acute angle portions and its T arms in engagement with the proximate rear face edge portions of the Z-shaped lside members, a wall tie having its end portion in engagement with the T portion of such holding bracket, and means to draw such wall tie forwardly with respect to the panels.

7. In a form for concrete construction, a plurality of panels, each panel including a molding plate, Z-shaped cross section side `supporting members for such panel, and cross cleats and tie-bars for such panel extending between the side members. for such panel, one arm of each Z- shaped member comprising a front abutment and the other arm of such Z-shaped member comprising a rear abutment, the bodies of the Z-shaped members of each panel slanting backwardly away from each other on acute angles with respect to their front abutments, the edge portions of each molding plate engaging the front abutments yof the corresponding Z-shaped members, the front abutments of the proximate Z-shaped members of adja cent panels extending to locations in close proximity to each other and being provided with wall tie receiving notches the end` portions yof the cleats of each panel being entered into the spaces between the body portions andthe rear abutments of the Z-shaped members of such panel, the acute angle rear portions of proximate Z-shaped members of adjacent panels being spaced apart, T-shaped bracket members between such spaced apart rear portions, the stems of said T-shaped bracket members extending betweenl the proximate Z-shaped members of such adjacent panels, and each wall tie having one end in engagement with a T-shaped bracket member and extending through corresponding wall tie receiving notches of the corresponding Z'shaped members and molding plates.

References Cited in the le of this patent UNITEDy STATES PATENTS 535,277 Dornan Mar. 5, 1895 1,014,630 Morrill Jan. 9, 1912 1,628,385 Bauer May 10, 1927 2,170,564 Lundin Aug. 22, 1939 2,258,694 Wedberg Oct. 14, 1941 2,640,249 Symons June 2, 1953 OTHER REFERENCES Symons catalog No. MF-l, p. 12, 4249 Diversey Ave., Chicago 39, Illinois.

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