US3498016A - Scaffold - Google Patents

Description

United States Patent Int. Cl. E04g N06 US. Cl. 52638 ABSTRACT OF THE DISCLOSURE A scaffold made up of spaced scaffold sections. Each said scaffold section being made up of spaced vertically extending channels with channel legs extending outward from each other. A splice channel is attached to each vertically extending channel and it extends above the upper end of the vertical channel. A laterally extending plank support is attached to each splice channel and the plank support holds the two splice channels together to form a rigid scaffold section. The lower ends of each vertical channel have a frame lock on it. When one scaffold section is stacked upon another, the frame lock on each vertical leg extends through a hole in a said plank support. The frame locks each have a locking means on their lower end. Adjustable Outriggers are provided. These outriggers each have a specific sliding connection between them and one of the vertical channels. A winch is attached to a vertical channel above each outrigger so that the outrigger can be lifted up and down. An improved locking means including a blade and a spring prevents the outrigger from sliding down.

This invention relates to scaffolds and, more particularly, to scaffolds for use by bricklayers, masons and other persons in the building trade.

The scaffold disclosed herein is made up of sections that can be connected together in spaced relation by means of brace bars. The sections can be stacked one on top of the other and adjustable outriggers are connected to the vertical legs of the sections and these Outriggers can support planks to carry building materials, such as bricks, and bricklayers.

It is an object of the invention to provide an improved scaffold.

Another object of the invention is to provide an improved scaffold that has facilities especially suitable for use by bricklayers.

Another object of the invention is to provide a scaffold for use in building trades which is simple in construction, economical to manufacture, and simple and efficient to use.

With the above and other objects in view, the present invention consists of the combination and arrangement of parts hereinafter more fully described, illustrated in the accompanying drawings and more particularly pointed out in the appended claims, it being understood that changes may be made in the form, size, proportions, and minor details of construction without departing from the spirit or sacrificing any of the advantages of the invention.

In the drawings:

FIG. 1 is an enlarged partial view of one of the vertical legs of the scaffold showing the adjustable outrigger supported thereon;

FIG. 2 is a partial top view of the part of the invention shown in FIG. 1;

FIG. 3 is an enlarged view of the flipper lock according to the invention;

FIG. 4 is a view of one of the sections of the scaffold;

FIG. 5 is an enlarged view of a joint where one vertical leg rests on another as when two scaffold sections 9 Claims "ice are stacked; FIG. 8 is a similar view of another embodiment;

FIG. 6 shows the scaffold sections in stacked relation and connected together by brace bars; and

FIG. 7 is an enlarged top view of one of the vertical channels similar to FIG. 1.

Now with more particular reference to the drawings, FIG. 4 shows one section of the scaffold which may be considered an end frame 10. Each end frame includes the vertical channel legs 22 which are connected together at their upper ends by the top plank support 23. The upper end of each vertical leg channel 22 is welded to a splice channel 29 and the splice channel extends above the upper end of the vertical leg channel as indicated. The top plank supports 23 are welded at their outer ends to the splice channels 29 and thus they hold the vertical legs together. The vertical legs at one side have the braces 18 welded to them at their lower end and the braces 18 are welded to the upper plank supports at their upper end and intermediate plank supports 15 are welded to the splice channels 29 and to the braces 19 at their other end. Additional plank supports 13 and 14 are welded to one leg 22 and braces 20 are welded to the vertical leg channel and to plank support 14, as shown.

When the scaffold sections are stacked, the lower end of an upper channel vertical legs 22 rests on the upper end of a vertical channel below it at 24 as best shown in FIGS. 4, 5, and 6. The scaffold frame locks 21 are welded to the lower ends of the vertical legs 22 and the scaffold frame locks 21 extend through holes 30 in plank supports 23. A latch 26 is pivoted to the lower end of each scaffold frame lock 21 and it can extend through the holes 30 and it will swing out to the position shown in FIG. 5 so that it would underlie the plank support 23 and prevent the upper section of scaffold from inadvertedly separating from the lower section of the scaffold when in use.

The adjustable Outriggers 16 are shown in FIGS. 1, 4 and 6. The Outriggers have the plank support 27 welded to the channel 32. The channel 32 has the space bolts 33 extending through it and through the back plate 34. Washers 60 hold the back plate space from the channel 32. The vertical legs 22 are in the form of channels that have channel legs 46 and 47 and these channel legs have inwardly extending flanges 48 and 49. These flanges 48 and 49 terminate in inwardly extending ends that engage the back plate 34 and guide it in its up and down sliding movement.

Winches 17 may be fixed to the vertical channels above the outrigger 16 and the winches may be connected to the eye bolts 39 to lift the Outriggers.

A spring 40 is received on the eye bolt 39 and the lower end of the eye bolt has a nut 41 on it holding it in place in the plank support 27. A flapper lock 37 extends above the channel 32 and has a hole 42 through which the bolt 39 extends. The flapper lock has two spaced notches 50 which receive the flanges 48 and 49 and the flapper lock has sharpened edges 51 that will frictionally engage the flanges 48 and 49 to prevent the outrigger from sliding downward.

It will be noted that when the outrigger tends to slide downward, the force of the spring 40 urged by the weight of the outrigger will cause the sharpened edges 51 (FIG. 3), to engage the flanges 48 and 49 and thereby prevent the outrigger from sliding downward.

The plank support 27 has the plank support lock guard plate 35 welded onto it that prevents the planks used by the bricklayer from sliding too far in to engage and interfere with the locks.

The brace rods 52 have holes in their opposite ends which receive the studs 54. The studs 54 have a latch 55 3 pivotally attached to the end thereof that are forced downward by the force of gravity and they prevent the brace rods from sliding off of the studs.

FIG. 2 shows a second channel 63 that is bolted to the top plank support 23 by means of bolts 64 having nuts 65 thereon. Thus, a second outrigger such as Outriggers having plank supports 27 can be supported across the end of the scaffold sections in addition to the Outriggers extending laterally as shown in FIGS. 4 and 6. This makes it possible to form a scaffold in an inside corner of a wall with scaffold boards extending along both walls forming the corner.

In the embodiment of the invention shown in FIG. 8, an alternative locking device for the lock 21 shown in FIG. 5, is shown. The lock is shown on a scaffold with vertical legs 122 and plank supports 123. The lock tube 143 is welded to the spacer 142 and a hooked rod 126 extends through the tube 143 and has a spring 140 on it on its upper end which bears against the flange 141 on the end of the straight part of the hooked rod 126. The hooked rod 126 can extend down through a slot 130 and it can be rotated after it is inserted so that its short end abuts against the lower side of the plank support 123.

The foregoing specification sets forth the invention in its preferred practical forms but the structure shown is capable of modification within a range of equivalents without departing from the invention which is to be understood is broadly novel as its commensurate with the appended claims.

The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows:

1. A scaffold made up of two spaced channel frames comprising a pair of spaced vertical legs,

a vertically extending outwardly facing channel comprising each said leg,

two Outriggers, one said outrigger being supported on each said leg,

each said channel having spaced legs facing outward and a web,

two back plates, one said back plate being disposed in each said channel,

spaced means holding said back plates in spaced relation to each said web,

and means fastening said back plates to said webs,

a plank support fixed to each said channel frame and extending outwardly therefrom,

each said vertical leg having a flange attached thereto and extending toward the other said channel frame lags,

a said back plate being disposed between each pair of the said channel frame legs,

said flanges being disposed between said back plates and said Webs,

and means for locking said Outriggers in position on said vertical leg whereby said outrigger can be adjusted vertically.

2. The scaffold recited in claim 1 wherein said means to lock said outrigger in position comprises a flapper-like plate-like member,

said plate-like member being disposed generally parallel to said plank support,

said plate-like member extending into the space between said legs of said vertical legs,

said plate-like members being wider than the space between said flanges, j notches in said plate-like rn'ember receiving said flanges.

3. The scaffold recited in claim 2 wherein said platelike member is attached to said outrigger by means of a bolt,

4 said bolt extending through a hole in said plate-like member and into said plank support.

4. The scaffold recited in claim 3 wherein said bolt has an eye at the upper end thereof,

a chain attached to said eye,

and means for attaching said eye to a said vertical leg.

5. The scaffold recited in claim 4 wherein a winch is attached to a said vertical leg,

and said winch has a cable thereon,

and means to connect said cable to said eye bolt.

6. The scaffold recited in claim 5 wherein each said vertical leg is a part of a scaffold frame,

and each said scaffold frame comprises two spaced said vertical legs,

and intermediate plan supports vertical legs in spaced pairs,

said intermediate plank supports being disposed generally parallel to said plank supports on said outriggers.

7. A scaffold comprising spaced scaffold frames,

each said scaffold frame comprising spaced vertically extending channels having channel legs extending away from each other,

a plank support connected to the upper end of each said vertical channel connecting two said vertical channels together to form a frame,

a hole in the top of each end of said plank support adjacent each said vertical channel,

and a frame lock attached to the lower end of each said leg,

the lower end of each said leg of one scaffold resting on the corresponding leg of scaffold section below it,

and a latch member swingably attached to said frame lock at the lower end thereof and adapted to swing out of alignment with said frame lock in an end of said latch underlying said plank support.

8. The scaffold recited in claim 7 wherein each said vertical channel has a splice channel attached to it on the inner side thereof,

said Splice channel extending above the upper end of said vertical channel,

said plank support being fixed to said vertical channel by means of said splice channel,

said scaffold section being adapted to be stacked with the lower end of the legs of a scaffold section resting on the upper ends of the vertical channel below it.

9. The scaffold recited in claim 8 wherein a plurality of brace studs are fixed to said vertical channels,

and brace bars are provided each having a hole in each opposite end,

said holes in said brace bars receiving said studs,

and means on the ends of said studs for retaining said brace bars thereon.

connecting said References Cited UNITED STATES PATENTS 2,290,535 7/1942 Cavins 182-l79 2,892,661 6/1959 French 1821l9 3,245,188 4/1966 Evans 52-638 3,396,817 8/1968 Perry 182-119 FOREIGN PATENTS 653,953 5/1951 Great Britain.

REINALDO P. MACHADO, Primary Examiner US. Cl. X.R. 1s2 17s; 24s 243

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