US2794235A - Inner right angle corner forming unit for a concrete wall form - Google Patents

Description

J1me 1957 B. HILLBERG 2,794,235

, INNER RIGHT ANGLE CORNER FORMING UNIT FOR A CONCRETE WALL FORM Filed May. 5, 1955 2 Sheets-Sheet 1 B. HILLBERG INNER RIGHT ANGLE CORNER FORMING UNIT June 4, 1957 FOR A CONCRETE WALL FORM 2 Sheets-Sheet 2 v Filed May 3, 1955 United States Patent INNER RIGHT ANGLE CORNER FOG UNIT FOR A CONCRETE WALL FORM Bror Hillberg, Chicago, Ill., assignor to Superior Concrete Accessories, Inc., Chicago, 111., a corporation of Illinois Application May 3, 1955, Serial No. 505,713

4 Claims. (Cl. 25-131 The present invention relates generally to wall forms. More particularly, the invention relates to that type of wall form which is designed for use in the formation of a concrete wall and comprises: (1) a series of upstanding edge to edge rectangular panels which are formed of plywood or other suitable material and have oppositely disposed hole forming notches in the abutting side edges thereof; (2) a second series of similar upstanding rectangular panels which are disposed in opposed but spaced apart relation with the panels of the first series; (3) horizontally positioned combined tie and spreader rods which extend between and at right angles to the two series of panels and have the ends thereof projecting through and beyond the notch-formed holes between the abutting side edges of the panels; and (4) removable clamping devices which are associated with the ends of the combined tie and spreader rods and serve when in place to hold the panels in fixed relation with the ends of the rods.

In connection with the use of a concrete wall form of the aforementioned type it is necessary when the wall to be formed is to have a right angle bend to arrange certain of the panels of one series at right angles with respect to the other panels of the one series and correspondingly to arrange the panels of the other series. Heretofore, difliculty has been experienced in positioning and connecting together the two panels that serve to form the inside corner of the right angle bend in the concrete wall that is formed by use of the form.

One object of this invention is to provide in connection with a concrete wall form of the type under consideration an inside right angle corner forming unit which involves a simple and novel construction, effectively and efficiently fulfills its intended purpose, and is so designed that it may be assembled and dismantled with facility. In general, the improved unit comprises: (1) a pair of vertically elongated rectangular upstanding panels'which are positioned at right angles to one another and so that their inner side edges are disposed a small distance apart; (2) an upstanding angle bar which is the same in height as the two panels, fits in the space between the inner side edges of the panels, and is arranged so that the outer surfaces of its side flanges are in coplanar relation with the inner faces of the panels respectively; and (3) releasable means for holding the angle bar and the two panels in fixedly connected relation.

Another object of the invention is to provide an inside right angle corner forming unit of the aforementioned character in which the two panels are provided on their outer faces thereof with vertically spaced horizontally disposed reenforcing boards which are arranged so that the inner end edges thereof are disposed adjacent to, but spaced a small distance inwards of, the inner side edges of the panels and have mounted on their outer surfaces longitudinally extending metallic strips the inner ends of which project beyond the inner end edges of the boards and are bent inwards at substantially right angles in order to form adjacent to the inner side edges of the panels yertically extending open ended sockets; in which the upstanding angle bar is provided with vertically spaced horizontally extending plates which are welded to the inner surfaces of the side flanges of the angle bar, are positioned adjacent to the inwardly bent ends of the metallic strips on the reenforcing boards and have the outer corner portions thereof provided with holes in alignment with the aforementioned sockets; and in which the releasable means for fixedly connecting together the angle bar and the two panels are in the form of vertically extending downwardly tapered pins which extend downwards through the sockets and the holes.

Another object of the invention is to provide an inside right angle corner forming unit of the type and character under consideration in which the inwardly bent inner ends of the metallic strips on the reenforcing boards have horizontal notches therein and the vertically spaced horizontally extending plates on the angle bar are arranged so that the hole-equipped outer corner portions thereof fit within the aforesaid notches.

Another object of the invention is to provide an inside right angle corner forming unit of the character under consideration in which the side portions of the vertically spaced horizontally extending plates on the angle bar have formed therein right angle cutouts for accommodating and snugly receiving the adjacent corner portions of the panels.

A further object of the invention is to provide an inside right angle corner forming unit of the character heretofore mentioned in which the pins for fixedly connecting together the angle bar and the panels are connected to the angle bar by flexible elements in order that they may be readily manipulated into and out of their operative position while at the same time they are not capable of being lost in connection with transportation of the unit as a whole.

A still further object of the invention is to provide an inside right angle corner forming unit which is generally of new and improved construction and is characterized by such simplicity of design that it may be produced at a comparatively low cost.

Other objects of the invention and the various advantages and characteristics of the present inside right angle corner forming unit will be apparent from a consideration of the following detailed description.

The invention consists in the several novel features which are hereinafter set forth and are more particularly defined by the claims at the conclusion hereof.

In the drawings which accompany and form a part of this specification or disclosure and in which like numerals of reference denote corresponding parts throughout the several views:

Figure l is a fragmentary perspective view of an inside right angle corner forming unit embodying the invention;

Figure 2 is a fragmentary perspective view of the angle bar of the unit;

Figure 3 is an enlarged fragmentary horizontal section of the unit, illustrating in detail the manner in which the vertically extending downwardy tapered pins serve fixedly to connect together the angle bar and the two panels and showing one of the panels in connected relation with an adjacent wall forming panel;

Figure 4 is a perspective view of one of the vertically spaced horizontally extending plates which are welded to the inner surfaces of the side flanges of the angle bar of the unit; and

Figure 5 is a side or edge view of the plate that is shown in Figure 4.

The inside right angle corner forming unit which is shown in the drawings constitutes the preferred form or embodiment of the invention. It is adapted to provide a part of a form for use in connection with the formation of a concrete wall having a right angle bend therein, and as its principal parts or components comprises a pair of upstanding vertically elongated rectangular panels 6 and an upstanding angle bar 7. It is contemplated that the unit will form the apex of a right angle series of edge to edge panels for forming the inner side of a concrete wall with a right angle bend and that such series will be in opposed but spaced apart relation with a similar series of edge to edge panels for forming the outer side of the wall.

The panels 6 of the unit are preferably formed of plywood and have flat inner and outer faces. They are arranged normally so that they extend at right angles to one another and have the inner side edges thereof spaced a small distance apart. The outer side edges of the panels 6 are provided at vertically spaced locations with semi-circular notches 8 through which certain ends of horizontally positioned combined tie and spreader rods 9 are adapted to extend as shown in Figure 3 of the drawings. The panels 6 are reenforced by horizontally disposed boards 10 which extend across the outer faces of the panels and are secured in place by nails 11 or similar attaching devices. The boards 10 are preferably positioned so that the imaginary longitudinal center lines thereof are in alignment with the semi-circular notches 8 in the outer side edges of the panels. As shown in the drawings the end edges of the reenforcing boards 10 are disposed a small distance inwards of the side edges of the panels. The boards are provided on the outer surfaces thereof with horizontally extending metallic strips 12. Such strips are located midway between the upper and lower edges of the reenforeing boards and are fixedly secured in place by way of screws 13. The inner ends of the strips 12 project beyond the inner end edges of the reenforcing boards and are bent inwards at substantially right angles, thus providing a hook portion 12a which, in combination with the inner end edges of the reinforcing boards, provide elongated vertically extending open ended sockets 14. The outer ends of the strips 12 project beyond the outer end edges of the reenforcing boards and are bent inwards at substantially right angles so as to form elongated vertically extending open ended sockets 15 adjacent to the semi-circular notches 8. The inner ends of the strips 12 are provided with horizontal notches 16 and the outer ends of the strips are provided with horizontal notches 17 for receiving the adjacent projecting ends of the combined tie and spreader rods 9.

The angle bar 7 of the inside right angle corner forming unit is the same in height as the panels 6. It is of one-piece character and consists of a pair of side flanges 18. The latter are flat and extend at right angles to one another. The angle bar 7 is disposed in the space between the inner side edges of the panels 6 and is arranged so that the outer surfaces of its side flanges are in coplanar relation with the inner faces of the panels respectively. As shown in Figure 3 the outer side edges of the side flanges of the angle bar abut against the inner side edges of the panels. The angle bar is provided with vertically spaced horizontally extending metallic plates 19. The latter are disposed between the side flanges 18 and are arranged so that they are in horizontal alignment with the inner ends of the metallic strips 12. The inner corner portions of the plates are connected by welds 20 to the adjacent portions of the inner surfaces of the side flanges 18. The side portions of the plates are provided with right angle cutouts 21 which accommodate and snugly receive the adjacent corner portions of the panels 6. The outer corner portions of the plates 19 extend through the notches 16 into the vertically extending open ended sockets 14 and are provided with vertically extending holes 22 which as best shown in Figure 3 are in registry or alignment with such sockets and are positioned adja cent to the right angle bends of the inner ends of the metallic strips 12.

In addition to the parts heretofore described the unit comprises releasable means for fixedly connecting together the angle bar 7 and the panels 6. Such means comprises a plurality of normally vertically extending, downwardly tapered pins 23. The latter correspond in number to the holes 22 in the outer corner portions of the plates 19 and are adapted in connection with use thereof to be driven downwards through the sockets 16 and the holes 22 as shown in Figure 1. When the pins 23 are in place certain side portions thereof engage with a wedging action the right angle bends of the inner ends of the metallic strips 12 and result in the panel corner portions that are adjacent to the angle bar being drawn into firmly seated relation with the right angle cutouts 21 in the side portions of the plates 19. The pins 23 are provided at the upper ends thereof with beads 24 and are connected to the side flanges 18 of the angle bar by way of chains 25 or other flexible elements. Certain ends of the chains are suitably connected to the heads 24 and the other ends of the chains are connected to eye-bolts 26. The latter are preferably located above the plates 19 and have the shanks thereof welded to, or screwed into holes in, the side flanges 18 of the angle bar 7. The chains 25 serve to prevent the pins 23 from being misplaced from the angle bar and hence in connection with transportation of the unit the pins are not likely to become lost and will be available at the location where the unit is to be installed or used.

The inside right angle corner forming unit is assembled by first placing the angle bar 7 in an upstanding or vertical position on a suitable foundation. Thereafter the panels 6 are manipulated into juxtaposition with respect to the angle bar and so that they extend at right angles to one another. After so positioning the panels the latter are shifted laterally towards the angle bar in order to bring the inner corner portions thereof into seated relation with the right angle cutouts in the side portions of the plates 19. In connection with inward lateral shift of the panels the outer corner portions of the plates slide into the sockets 14 via the horizontal notches 16 in the inwardly bent inner ends of the metallic strips 12. After the panels 6 are properly positioned with respect to the angle bar 7 the pins 23 are driven downwards so that they extend through the sockets 14 and the holes 22. As soon as the pins are driven fully into place, they serve fixedly to connect together the angle bar 7 and the panels 6. When it is desired to dismantle the unit after a wall forming operation, the pins 23 are driven upwards until they are removed from the sockets 14 and the holes 22. After removal of the pins from their operative position, the panels are free and hence may lge removed by sliding them laterally away from the angle In connection with use of the unit, it is contemplated that wall forming panels like those disclosed in my copending United States patent application Serial No. 500,107, filed on April 8, 1955 and entitled Concrete Wall Form will be placed in edge to edge relation with the panels 6 of the unit and clamped in place by way of releasable clamping devices like that shown in Figure 3 of the drawings and designated by the reference numeral 27. Such devices comprise brackets 28 and U-shaped locking bolts 29. The brackets are horizontally elongated, extend at right angles to the panels and embody at their inner ends pairs of spaced apart depending fingers certain of which are adapted to fit in the sockets 15 that are formed by the inwardly bent outer ends of the metallic strips 12. The U-shaped locking bolts 29 of the removable clamping devices 27 are slidably mounted on the inner ends of the brackets 28 and are adapted when driven into the direction of their open ends to be brought into straddled relation with heads 30 on the extremities of the combined tie and spreader rods 9. For a more detailed description of the construction, arrangement and mode of operation of the combined tie and spreader rods 9 and the removable clamping devices 27 reference may be had to my aforesaid copending United States patent application Serial No. 500,107.

The herein described inside right angle corner forming unit due to its particular design or construction effectively and efliciently fulfills its intended purpose and is char-.

acterized by the fact that it may be installed and removed with facility and also produced or fabricated at a comparatively low cost.

The invention is not to be understood to be restricted to the details set forth since they may be modified within the scope of the appended claims without departing from the spirit and scope of the invention.

Having thus described the invention what I claim as new and desire to secure by Letters Patent is:

1. As a new article of manufacture, an inside right angle corner forming unit adapted to constitute a part of a form for use in the formation of a concrete wall with a right angle bend therein and comprising a pair of side by side upstanding panels positioned at right angles to one another and so that their inner side edges are spaced a small distance apart, vertically spaced horizontally disposed reenforcing boards extending across, and secured to, the outer faces of the panels and arranged so that they are in horizontally aligned pairs and have the inner end edges thereof disposed a small distance inwards of the inner side edges of the panels, metallic strips extending lengthwise of, and connected to, the outer faces of the boards and having the inner ends thereof projecting beyond the inner end edges of the boards and bent inwards so as to form, in combination with said inner edges of the boards, vertically extending sockets, an upstanding angle bar consisting of right angle side flanges, positioned in the space between the inner side edges of the panels, arranged so that the outer surfaces of its side flanges are substantially in coplanar relation with the inner faces of the panels respectively, and having disposed between, and fixedly connected to, the inner surfaces of its side flanges vertically spaced horizontally extending plates corresponding in number to, and respectively horizontally aligned with, the pairs of sockets and having the outer corner portions thereof provided with holes in substantial vertical alignment with the sockets, and means operative releasably to connect together the angle bar and the panels and consisting of vertically positioned pins extending through said sockets and holes, said pins, when positioned in said holes, exerting a wedging action on the inwardly bent ends of said metallic strips tending to draw the panels against the side flanges of said angle bar.

2. As a new article of manufacture an inside right angle corner forming unit adapted to constitute a part of a form for use in the formation of a concrete wall with a right angle bend therein and comprising a pair of side by side upstanding panels positioned at right angles to one another and so that their inner side edges are spaced a small distance apart, horizontally disposed reenforcing boards extending across, and secured to, the outer faces of the panels and arranged in horizontally aligned pairs and so that the inner end edges thereof are disposed a small distance inwards of the inner side edges of the panels, metallic strips extending lengthwise of, and connected to, the outer surfaces of the boards and having the inner ends thereof projecting beyond the inner end edges of the boards, bent inwards so as to form, in combination with the inner edges of the boards, vertically extending sockets, and provided with longitudinal notches, an upstanding angle bar of substantially the same height as the panels, consisting of right angle side flanges, positioned in the space between the inner side edges of the panels, arranged so that the outer surfaces of its side flanges are in coplanar relation with the inner faces of the panels respectively, and having disposed between, and fixedly connected to, the inner surfaces of its side flanges vertically spaced horizontally extending plates corresponding in number to, and respectively horizontally with, the pairs of metallic strips and having the outer corner portions thereof extending through the aforesaid notches and provided with holes in substantial vertical alignment with the sockets, and means operative releasably to connect together the angle bar and panels and consisting of vertically positioned pins extending through said sockets and holes, said pins, when positioned in said holes, exerting a wedging action on the inwardly bent ends of said metallic strips tending to draw the panels against the side flanges of the angle bar.

3. As a new article of manufacture, an inside right angle corner forming unit adapted to constitute part of a form for use in the formation of a concrete wall with a right angle bend therein and comprising a pair of side by side similar upstanding panels positioned at right angles to one another and so that their inner side edges are spaced a small distance apart, horizontally disposed. reenforcing boards extending across, and secured to, the outer faces of the panels and arranged so that they are in horizontally aligned pairs and have the inner end edges thereof spaced a small distance inwards of the inner side edges of the panels, metallic strips extending lengthwise of, and connected to, the outer surfaces of the boards and having the inner ends thereof projecting beyond the inner end edges of the boards, bent inwards at substantially right angles so as to form, in combination with the inner edges of the boards, oppositely disposed pairs of vertically extending sockets, and provided with longitudinal notches, an upstanding metallic angle bar of the same height as the panels, consisting of right angle side flanges, positioned in the space between the inner side edges of the panels, arranged sothat the outer surfaces of its side flanges are substantially in coplanar relation with the inner faces of the panels respectively, and having disposed between, and welded to, the inner surfaces of its side flanges vertically spaced horizontally extending metallic plates corresponding in number to, and respectively horizontally aligned with, the pairs of sockets, having the outer corners thereof extending through the notches and provided with holes in vertical alignment with the sockets, and having in their side portions right angle cutouts in which the adjacent corner portions of the panels fit snugly, and means operative releasably to connect together the angle bars and the panels and consisting of vertically positioned tapered pins extending through said sockets and holes, and exerting a wedging action on the inwardly bent ends of said metallic strips tending to draw the panels against the side flanges of said angle bar.

4. As a new article of manufacture, an inside right angle corner forming unit adapted to constitute part of a form for use in the formation of a concrete wall with a right angle bend therein and comprising a pair of side by side upstanding panels positioned at right angles to one another and so that their inner side edges are spaced a small distance apart, horizontally disposed reinforcing boards of substantial vertical width extending longitudinally across, and secured to, the outer faces of the panels and arranged so that they are in horizontally aligned pairs and have the inner end edges thereof disposed at small distance inwards of the inner side edges of the panels, metallic strips extending lengthwise of, and connected to, the outer surfaces of the boards medially of their upper and lower edges and having their inner ends bifurcated with the bifurcations thereof projecting beyond the inner edges of the boards and turned laterally to provide a pair of hook portions which are spaced apart in a vertical direction, an upstanding metallic angle bar of the same height as that of the panels and consisting of right angle side flanges positioned in the space between the inner side edges of the panels with the outer surfaces of said side flanges disposed substantially in coplanar relation with the inner faces of the panels respectively, horizontally extending metallic plates disposed between and welded to the inner surfaces of said side flanges, said plates corresponding in number to and being respectively aligned with the bifurcated inner ends of said metallic strips, said plates being formed with right angle cutouts in which the adjacent corner portions at the inner edges of the panels snugly fit, the free outer end regions of said plates being closely straddled by the bifurcations at the inner ends of said metallic strips so that the hook portions overlie and underlie the plates respectively, there being a hole formed in each plate in substantial vertical alignment with each pair of spaced hook portions, and a tapered pin projecting through each hole and exerting a wedging action on at least the upper hook portion of each spaced pair thereof tending to draw the panels against the side flanges of said angle bar.

References Cited in the tile of this patent UNITED STATES PATENTS Davis et al. Sept. 6, 1910 Carpenter Apr. 5, 1921 Creedon May 18, 1926 Baumberger Sept. 7, 1926 Stevens Mar. 22, 1927 FOREIGN PATENTS Australia Sept. 4, 1941

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