US2760249A

US2760249A - Concrete wall form

Info

Publication number: US2760249A
Application number: US360056A
Authority: US
Inventors: Wilson Thomas Woodrow
Original assignee: Individual
Current assignee: Individual
Priority date: 1953-06-08
Filing date: 1953-06-08
Publication date: 1956-08-28
Anticipated expiration: 1973-08-28

Description

Aug. 28 1956 Filed June 8, 1 953 T. w. WILSON 2,760,249

CONCRETE WALL FORM s shets-sheet 1 Aug. 28, 1956 T. w. WILSON 2,760,249

CONCRETE WALL FORM Filed June 8, 1953 3 SheejtsSheet 2 Z6 md@ Aug. 28, 1956 T. w. wlLsoN 2,760,249

CONCRETE WALL FORM Filed June 8, 1953 3 Sheets-Sheet 3 Q C. v Q i4 w d l V United States Patent O CONCRETE WlfLL FORM Thomas Woodrow Wilson, Spokane, Wash.

Application June s, 1953, serial No. 360,056

s claims. (ci. 2s131) v My invention relates to improvements in a concrete wall form. These forms to which my invention applies are usually constructed of wood panels and are erected to form two spaced apart supporting walls between which rthe iluid concrete is poured and held until it sets. The form walls are usually held together by cross tie rods or strips. The problem of making these forms in panels which could be set up and taken down quickly is a diicult one. This is evident from the fact that there are many patented devices which propose to eliminate the diiculties. It is nevertheless true `that builders who operate generally on a relatively small scale, use wood panels that are supported and backed up by wooden frame members and the frame members are nailed together. This makes it necessary to pull the nails in taking down the forms and repeated use of such forms is not economical because they soon deteriorate.

The principal purpose of my invention is 'to provide a wall form assembly which embodies improved devices for securing and protecting the facing sheet, which devices provide the means to clamp two edgewise adjacent panels together, and in addition, provide the means to secure the tie strips which connect the opposite wall forms.

More specifically it is the purpose of my invention to provide a panel which makes a form when connected with like panels and with tie strips, wherein the panel consists of 'a facing sheet such as plywood with ltwo metal edge strips covering the side edges of the plywood facing sheet, and walers or cross members connecting the edge strips and backing up the facing sheet. The edge strips have ilanges spaced from the facing sheet and they are apertured with aligned apertures 'to receive headed pins for connecting two 'adjacent panels. One of the edge strips carries the securing pins and `the wedges for connecting two panels together, with means for fastening the tie strips that connect to opposite walls of lthe form. Each of these panels embodying my invention is a complete unit, having all of `the necessary parts to attach it to an adjacent panel. The panels are of uniform rectangular dimensions and thickness so that they may be handled just as sheets would be handled in stacking them up and transporting them from one place to another.

The nature and advantages of my invention will appear more fully from the following descrip-tion and the accompanying drawings in which a preferred form of the invention is illustrated. It should be understood however, that the description and drawings are illustrative only and are not intended to limit the inventionexcept insofar as it is limited by the claims.

In the drawings:

Figure l is a side view of a portion of a concrete wall form showing how one panel is joined to two adjacent panels;

Figure 2 is a perspective view of a portion of a panel illustrating the uniformity of the panel structure and the way in which each panel carries its securing means;

Figure 3 is an enlarged plan sectional view taken on the line 3 3 of Figure 1;

"ice

Figure 4 is a fragmentary sectional view taken on the line 4 4 of Figure 3;

vFigure 5 is an enlarged fragmentary section-al view taken on the line 5 5 of Figure 1;

Figure 6 is a sectional view taken on the line 6 6 of Figure 5; and

Figure 7 is a fragmentary sectional View taken on the line 7 7 of Figure 2.

Referring new in detail to the drawings and in particular to Figures 1, 2 and 3, my invention is shown as embodied in a panel assembly wherein a plurality of

panels

10, 11 and 12 form one side of a wall form and corresponding panels 10a, 11a etc. form the opposite wall of the form. In this assembly each panel comprises a facing sheet 14 which is of such common materials as plywood, or composition board faced on a wood backing. Each facing shee-t is positioned between two

metal edge strips

15 and 16. The

strips

15 and 16 substantially cover the edges of the sheet 14 and extend perpendicular to the sheet beyond one face thereof. The

edge strips

15 and 16 have

flanges

17 and 18 along the edges thereof which are most remote from the sheet 14. These anges are turned in toward each other.

The sheets 14 are backed up by a plurality of cross bars 19, 2l?, 21, 22, 23, 24 and 25 which extend between the

edge strips

15 and 16. The spacing of the cross bars is such as to give the greatest support to the sheet 14 near the bottom of the form because that is where the greatest expansive force of the uid concrete is encountered. The

cross bars

19 and 25 are so constructed as to protect the end edges of the sheet 14. Preferably the cross bars 1.9 and 2S are composite bars, made up of angle iron 26 which is joined to the

edge strips

15 and 16 and a rectangular Wooden bar 27 which sets between the angle iron 26 and the sheet 14. The

cross bars

21, 22 and 23 may well be made entirely of wood. The

cross bars

21 and 24 however, are made of angle irons which have their vertical flanges 20a and 24a engaging the sheet 14 and their horizontal flanges 26h and 2417 extending outwardly away from the sheet 14.

The

angle irons

20, 24 and 26 are welded Ito 'the

end strips

15 and 16 to provide a rectangular rigid frame of metal. The wooden cross bars such as 21, 22, 23 and 27 are fastened by nails 42 through holes in the flanges 17 and 1S and the sheet 14 is fastened to these wood bars by screws or nails. The

end strips

15 and 16 have stops 2S punched out at intervals throughout their length to engage against the back of the sheet 14. It will be noted that the entire panel is free of any projecting parts that could be readily bent in handling and transporting it.

The constructions by which the panels are assembled together Ito form two spaced apart walls is quite simple. The

end 4strips

15 and 16 have aligned

apertures

29 and 30 at spaced intervals throughout their length. The lowermost apertures 29 land 3l) are directly below the angle iron cross bar 24 and the uppermost apertures 29 and 3l) are directly below the angle iron cross bar 29. The apertures 30 in -the end strip 16 hold headed pins 31 when the panels are separated for handling. The headed pins 31 have slots 32 therein for the reception of wedges 3'3. The wedges 33 are driven in tightly enough to secure the pins 31 in place so lthat they will not be lost in transportation. The angle iron cross bars Ztl and 24 have slots 34 therein through which lthe wedges 33 pass to secure the pins 31, located at this point. For the wedges that 4are not adjacent -to the cross bars `2li and 24, l provide small blocks 35 `on t-he inner face of the end strip 16 to serve as lstops to keep the wedges 33 from swinging out away from the sheets 14.

When the panels are being assembled, a tie strip 36 is used in combination with the panels to tie the two opposite walls together. These tie strips may be used with each of the headed pins 31, if desired. `In assembling the wall, the ytie strip is laid between two adjacent end -strips and 16, just above the apertures for the pin 3l. The tie strips hook over the end strips l5 and 16 as illustrated at 37 and 38 in FigureS of the drawings. Also each end of the tie strips is folded over on itself as indicated at 39 and 4i?, for the purpose which will presently appear. Notches 41 are provided inthe anges 18 ofthe end strip 16 toreceive the bent over

ends

37 and 33 of the tie strip 36. When the tie strips 36 are in place and the wedges 33 are driven down, they clamp the tie strips Itightly against the adjacent face of the end strip 16. When the force, due to the weight of Ithe -fiuid concrete, tends to spread the two form walls apart, the tie strip 36 will lof course, have la force exerted on it, tending to force it to slip Vwith respect to the end strips 1S and 16, and to work out from ythe wedges 33. The construction illustrated and just described, effectively prevents slipping of the tie strips. The clamping between the end strips 1S and 16 alone is not enough, nor is the bend at 37 and 38 enough to prevent slipping. However, the friction at these points, plus the clamping action of the wedge and the opposition offered yby the folded over ends 39 and 40 of the tie strips gives adequate holding power to prevent spreading ofthe walls up `to the strength of the tie themselves.

It is believed that the nature and advantages of my invention will be apparent from ythe foregoing'description.

Having thus described my invention, I claim:

l. A panel assembly for constructing forms for pouring concrete walls comprising in combination, -a pair -of `opposed groups of like panels arranged edge to edge wherein each panel comprises a rectangular facing sheet, metal edge strips secured -to said sheet and extending along two opposite edges of the sheet, Ithe edge strips covering the edges of said sheet and extending perpendicular to the sheet beyond one-,face thereof, the strips having inturned flanges along their edges most remote .from the sheet, spaced cross bars connected to the strips and extending from one strip to the other between the flanges and the sheet and providing backing support for said sheet, the strips having apertures therein adjacent to certain of said cross bars, the apertures in one strip being aligned with the apertures in lthe opposite strip whereby two like panels may be placed edge to edge with the apertures in their abutting side strips in registration to receive a fastening member, headed pins having their Shanks extending through the registered apertures, the Shanks of said pins having slots therein to receive wedges for drawing the side strips of two edge to edge panels together, wedges inserted in said slots, the adjacent cross bars having slots at one end also receiving the wedges whereby to prevent turning of the wedges away from the sheets, tie strips extending between the two groups of panels and between the side strips of edgewise meeting panels in each group at levels between the headed pins and the adjacent slotted cross bar, the ends of each tie strip being bent around the side strip adjacent to the wedge and passing between the Wedge and the side strip, the ends of the tie strips being folded over upon the tie strips between the Wedges and the adjacent surface of the sheet.

2. The invention defined in claim 1, in which the inturned flanges of the side strips are cut away where the tie strips are bent around the side strips.

3. A panel for use in setting up forms for pouring concrete walls comprising a rectangular facing sheet, metal edge strips secured to said sheet and extending along two `opposite edges of the sheet, the edge strips lsubstantially covering the edges of said sheet and being wider than the thickness of 4the sheet to extend perpendicular to the sheet beyond one face thereof, the strips 'having anges at their edges most remote from theV sheet, the anges of the strips extending toward each other, the strips having spaced apertures therein between their anges iand the facing sheet, spaced cross bars connecting the end strips and bearing against the sheet to provide backing support for the sheet, certain `of said cross `bars' having wedge guide slots wherein adjacent to one of the end `strips and said certain cross bars being adjacent to but spaced from an aperture in said one end strip, headed pins carried in the apertures ofthe last named end strip and having wedge slots therein to receive and hold Wedges extending through said guide slots, Ithe ange having a tie strip guidenotch therein between each slotted cross bar and the adjacent pin receiving aperture, and wedges in said guide slots and extending through the slots in the pins to secure `the pins to the panel.

4. A panel for use in Setting up forms for pouring concrete walls comprising rectangular facing sheet, metal edge strips secured -to said sheet and extending along two opposite edges of the sheet, the edge strips substantially covering the edges of said sheet and being wider v than the Athickness of the sheet to extend perpendicular to the sheet beyond one face thereof, Ithe strips having anges at their edges most remote from the sheet, the flanges of the ystrips extending toward each other, the strips having spaced apertures therein between said flanges and the facing sheet, spaced cross bars connecting the end strips and bearing against ythe sheet to provide backing support for the sheet, headed pins carried in the apertures of one of said end strips with their heads on `the outer face of the strips, the pins having wedge receiving slots therein, wedges passing through said lslots and `securing the pins to said end strip, and Wedge guide mem- -bers on the inner faceof said strip rspaced from the aperture and preventing the wedges and pins from rotating in Ithe aperture, 'the flange having atie strip guide notch between the aperture and the adjacent Wedge guide member.

5. The invention defined in claim 1 in which the end strips have other aligned -apertures therein spaced from the rs-t named apertures and from said cross bars, headed pins having slotted Shanks extending through said other aligned apertures, Wedges in said slotted Shanks, blocks on the end strips holding the last named wedges against rotation, and tie strips like said first named tie strips bent around the side strip adjacent to the last named wedges `between lthe blocks and the pins land clamped in place by said wedges. f

References Cited in the file of this patent UNITED STATES PATENTS 1,560,298 Moss et al. Nov. 3, 1925 1,875,366 Beghetti Sept. 6, 1932 2,275,738 Dark Mar. 10, 1942 2,584,822 Symons Feb. 5, 1952 2,640,249 Symons June 2, 1953 Y FOREIGN PATENTS 328,644 Great Britain Apr. 28, 1930