US2805902A - Scaffold - Google Patents

Description

p 1957 a. VON DRASEK ETAL 2,805,902

SCAFFOLD Filed Dec. 29, 1952 2 Sheets-Sheet 1 INVENTORS 2/012, till /a 9/2 $232 Zinnia l gspj ominic Sept. 10, 1957 J. VON DRASEK ETAL 2,805,902

SCAFFOLD Filed Dec. 29, 1952 '2 Sheets-Sheet 2 ilniteei Fatent scarrotn Joseph Von Drasek and Dominick l t i. De Canio, Qhieago, 31., assignors to Universal Form Clamp Con, filneago, 111., a corporation of Application December 29, 1952, deriai No. 328,325

1 Claim. (Ci. 3il4-14) .This invention relates to scafiolds and is particularly concerned with an improved form of scaffold for use with concrete wall forms.

In the construction of concrete walls and the like, it is frequently necessary to employ scaifolding to enable the workmen to assemble the forms and pour the concrete at successively higher elevations of the structure. Various types of scaffold brackets have been designed for use in such work and, generally, such brackets have been secured to the sides of the wall form by fastening the inner portion of the bracket to the form panels or to one or more horizontal wooden stringers which are used for alining the form panels. Scaffold brackets heretofore in use have been objectionable in that it took considerable time and effort to assemble and dismantle the scaffold in moving from one position to the next. A type of wall form in wide use today is one having panels comprising a metal frame and a non-metallic facing such as is disclosed in the Anderson patent, No. 1,970,547.

The principal objects of the present invention are to provide a scafiold for use with the metal frame type panel form which is readily attachable to the frame portion of such panel forms for support; to provide improved demountable means for securing the scaffold to the horizontal frame members of the panel forms; to provide a scafiold bracket having means for firmly anchoring the scafiold planking in position thereon, whether such planking is of single thickness or of double thickness by virtue of overlapping of the adjoining ends of the boards; to provide a scaffold which may be readily assembled and dismantled by unskilled workmen; and to provide a scaffold afiording all of the aforementioned advantages which is relatively simple to manufacture, extremely durable, and economical.

An illustrative embodiment of this invention is shown in the accompanying drawings, wherein:

Figure 1 is an end elevation of an improved scaffold to which this invention is applied, part of a concrete wall and a panel form being shown in section;

Figure 2 is a horizontal section taken along the line 22 of Figure 1;

Figure 3 is an enlarged perspective view of one of the clamps used in detachably securing the bracket to the horizontal frame members of the panel form;

Figure 4 is a fragmentary top plan vie-w of the structure illustrated in Figure l, but showing overlapping planking on the scafiold;

Figure 5 is a vertical transverse section, taken along the line 5-5 of Figure 4;

Figure 6 is a transverse section, partly broken away, taken along the line 6-5 of Figure 5.

In the illustrated embodiment 'of the invention, the improved scaffold 7 is used in connection with the construction of a concrete wall 3 wherein modern metal frame panel forms 9 are employed. Each of the panel forms comprises a frame 1% of T-members, made of steel or the like, supporting a wooden panel 11 in flush relation to the short leg of the T-member.

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The frame 10 includes a pair of side members 12, top and bottom members 13, and reinforcing Temembers 14 which extend between the side members 12 of the metal frame on the outer face of the wooden facing member 11. The size of the frame members and the vertical spacing of the reinforcing members 14, of course, depend upon the size of the panel form and the strength required therefor to support a maximum concrete load. Generally, however, the spacing between the members 14 is uniform and only the number of such members varies with the size of the panel form.

The web portion of the members 14 projects outwardly from the concrete engaging wooden panel 11, and this projecting portion of the members 14- may be used for supporting the scaffold which is the subject of the present invention. Also, it will be apparent from the drawings that the T-member 13, forming the top and bottom of the panel supporting frame 19, has a leg projecting outwardly the same distance as the members 14 and, therefore, may also be used in the same manner.

The scaffold 7 comprises generally two or more brackets 15 which are secured in aligned relation along the concrete retaining panel forms 9 and support a platform 16 and a hand rail 17. Each of the brackets 15 is formed preferably of angle members and includes a platform supporting T-shaped frame having a cross bar or member 18 fixed, as by welding, to a relatively long member 19. The cross bar 18 is adapted for support by the upper face of the web portion of a selected one of the form members 13 or 14, with the longer member 19 extending outwardly from the form to support the scaffold planking 16. a

The member 19 has fixed thereto, at an intermediate portion within easy reach of the wall being constructed;

an upright angle member 2a? which forms the inner limit for the platform 16. The outer end of the member 19 has fixed thereto, as by welding, another upright member 21 which is considerably longer than the first member 19 and provides at its upper end a support for the hand rail 17.

The upright members 26 and 21 are positioned on the same side of the horizontal member 19 with their trans-- verse flange portions 23.1 and 21.1, respectively, similarly disposed. to provide for alignment of a plurality of open-' ings 29.2 and 21.2 formed in these transverse flanges These openings provide means for the insertion of-a rod 23, or the like, to maintain the platform or planking 16 in position'on the bracket 15. As illustrated, the rod 23 may have a pin 24 at one end and be threaded at the other end to receive a nut 25, so that the rod may be readily inserted in a pair of the aligned openings 22 "to hold a single thickness of planking in place (Figure l), or it may be inserted in another pair of the aligned openings 22 to accommodate the planking at a point of overlap (Figures 4 and 5). Obviously, the described structure may be readily adapted to fit planking having a thickness within any desired limits. Furthermore, the rod 23 may be provided with a series of transverse openings 22 therethrough to accommodate nails 25 or the like for more firmly securing the planking 16 in position.

As noted previously, the upper end of the upright member 21 supports the hand rail 17, and for assisting therewith a channel section. A'section of the web of the channel formed by the members 21 and 27 is cut out to provide a U-shaped portion which is open at its upper end to receive the hand rail 17 (Figure 5). Suitable openings may be provided in the flange 21.1 of the upright member 21, if desired, to permit driving nails 21.3 into the hand rail to more firmly secure it to the scaffold. As

, shown in Figures 1 and 5, the uprightmember 21 is dis- I Q posed at'a slight angle with respect to the vertical in order .to provide maximum usage of the floor space on the scaffold without detracting in any way from the usefulness of the hand rail.

To provide adequate support for the scaffold, there is a T-shaped brace 28 which'includes a cross bar or member 29 for bearing on the upper surface of'the Web portion of one of the members 13 or 14, and a brace or strut 30 which extends upwardly at an angle from the cross bar 29 to a-pivotal connection, as by a bolt 31, with an intermediate portion of the member 19. The brace 28 is, of course, designed to fit the spacing of the horizontal members of the panel forms.

"For firmly securing the cross bars 18 and 29m the horizontal members of the forms, there'is provided locking clamp 32, which may be easily and quickly put in place to effectively lock these members in position.

As seen in Figure 3, this clamp is preferably in the form V of a casting which has an integrally formed pin 33 at one end of a short bar member 34, and a transverse'yoke portion 35 at the other end of the bar. 'Asnoted in Figure 4, a pair of the clamps 32 is arranged on respectively opposite sides of the member. 19 and each of the clamps is positioned with its pin 33 extending through aligned openings in the cross bar 18 and the underlying frame member of the form. The clamp is then pivoted'about the axis of the pin 33 until the yoke 35 firmly embraces the cross bar "18 and the form frame member to prevent relative vertical movement therebetween.

A second pair of the clamps 32 is similarly positioned on the cross bar 29 on respectively opposite sides of the brace '28 to secure the former in position on one of the horizontal members of the panel frame. It is preferred, of course, that the spacing between the two legs of the yoke portion 35 be approximately equal to' the thickness of the overlapping portions of the form frame member and the cross bar 18 or 29, so that the yoke may be held in looking position throughfrictional engagement with 'the overlapping portions of the panel forms and'the However, in the event such condition.

scaffold bracket. does not exist, there is provided a pair of openings 36 through the intermediate portion of the clamp for inserting a pin or bolt 37 through the clamp and aligned openings in the underlying members, as seen in Figure l, to prevent the clamp from pivoting about the axis of the pin 33.

From the foregoing description, it is seen that the scaffold bracket is readily positioned by placing the cross bars 18 and 29 on horizontal frame members'of the panel forms and securing them in place by use of the clamps 32. The scaffold planking .can thenbe put in place. on adjoining pairs of brackets and fastened by means of the rods 23. With the positioning of the hand rail '17, the scaffold is then ready for use. The reverse procedure, of course, is followed in dismantling the scatfold.

Thus there is provided a scaffold for use with concrete forming panels which combines rigidity and strength with ease of assembly in utilizing a simplified construction of relatively light weight and of economical design. Furthermore, the elements of the scaffold supporting bracket are compact in form and require a minimum of space during storage or transportation to and from the construction site. While there has been illustrated and described a particular form of construction embodying the invention, it is 'to be understood that it is not intended tothereby limit the invention. Various other modifications of the invention, without departing from the spirit thereof,'will become apparent to those familiar with the art involved.

We claim:

In combination with a concrete wall panel form having a plurality of vertically spaced, horizontally disposed rame members including laterally extending flange portions, a scafiold supporting bracket formed of metal angle members and comprising a generally horizontally disposed first T-shaped frame including a cross bar and a leg member, said cross bar being supported on one of said flange portions of the panel frame, a pair of upright members fixed in spaced apart relation on said leg member of said first T-shaped frame with one of said upright members disposed adjacentthe free end of said leg member and including means adjacent its upper end for supporting a hand rail, a platform retaining means extending between said upright members and detachably secured thereto at a selected pair of a plurality of vertically spaced positions of attachment provided on said upright members, said platform retaining means being adapted to hold platform members disposed transversely of said leg member inposition between saidupright members, a second T-shaped frame including a leg portion and a cross member and having the free end of said leg member pivotally attached to said leg member of said first T-shaped frame at a position intermediate said upright members, said'cross memher being supported on another of said flange portions 7 below said one flange portion of the panel frame which is engaged by said first T-shaped frame, and removable means securing said cross bar and said cross member to said. one flange portion and said other'flange portion, respectively.

References Cited in the file of this patent 9 UNITED STATES PATENTS 1,449,638 Trester Mar. 29, 1923 2,136,696 Lamb Nov. 15, 1938 2,573,086 Yoshimoto Oct. 30, 1951 2,577,979 Pierson, et'al. Dec. 11, 1951 2,605,074 Bucsko, et al July 29, 1952 FOREIGN PATENTS r 51,766. Switzerland of 1911

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