US3146855A

US3146855A - Vertically movable scaffold seat

Info

Publication number: US3146855A
Application number: US302911A
Authority: US
Inventors: Arthur F Aberegg
Original assignee: Individual
Current assignee: Individual
Priority date: 1963-08-19
Filing date: 1963-08-19
Publication date: 1964-09-01
Anticipated expiration: 1981-09-01

Description

Sept. 1, 1964 A. F. ABEREGG VERTICALLY MOVABLE SCAFFOLD SEAT 2 Sheets-Sheet 1 Filed Aug. 19, 1963 INVENTOR. I ARTHUR F. ABEREGG FIG.5

ATTORNEY FIG.I

Sept. 1, 1964 A. F. ABEREGG VERTICALLY MOVABLE SCAFFOLD SEAT 2 Sheets-Sheet 2 Filed Aug. 19, 1963 FIG.6

FIG.9

INVENTOR. ARTHUR F. ABEREGG W6 ATTORNEY FIG. IO

United States Patent 3,146,855 VERTICALLY MOVABLE SCAFFOLD SEAT Arthur F. Abel-egg, 2128 S. Linden, Alliance, Ohio Filed Aug. 19, 1963, Ser. No. 302,911 3 Claims. (Cl. 132-146) This invention relates to scaffolds in general and more particularly to a vertically movable scaffold seat and a support pole therefor.

The principal object of the invention is the provision of a simple and economical vertically movable scaffold seat and pole support which may be used in painting, repairing or maintaining exterior and interior wall surfaces and the like.

A further object of the invention is the provision of a vertically movable scaffold seat and pole support incorporating a motor powered winch for moving the seat relative to the pole support.

A further object of the invention is the provision of a vertically movable scaffold seat and pole support therefor and incorporating means on said seat for engaging said vertical support so as to hold the same relative thereto.

A still further object of the invention is the provision of a portable vertically movable scaffold seat and a pole support therefor that may be used in carrying a workman up and down a wall or other vertical surface being painted, repaired or otherwise worked upon.

The vertically movable scaffold seat and pole support therefor disclosed herein comprises an improved devicefor use by a workman as in painting a wall or a building or the like. The device is comparable in size and weight with a ladder and is easily and quickly positioned along side a building whereupon the workman, seated on the vertically movable seat, may control the vertical movement of the seat so as to move up and down relative to the building wall as in a painting operation. The device may be moved horizontally as simple and light-weight tackle is used to secure the upper end relative to the building, and which tackle enables the device to be so moved.

With the foregoing and other objects in view which will appear as the description proceeds, the invention resides in the combination and arrangement of parts andin the details of construction hereinafter described and claimed, it being the intention to cover all changes and modifications of the example of the invention herein chosen for purposes of the disclosure, which do not constitute departures from the spirit and scope of the invention.

.The invention is illustrated in the accompanying drawing, wherein:

FIGURE 1 is a perspective view of the vertically movable seat and pole support.

FIGURE 2 is a horizontal section on line 2-2 of FIG- URE 1.

FIGURE 3 is a vertical section on line 3-3 of FIG- URE 1.

FIGURE 4 is a vertical section on line 4-4 of FIG- URE 1.

3,146,855 Fatented Sept. 1, 1954 ice FIGURE 10 is a vertical section through a modified portion of the seat illustrating an alternate safety brake.

By referring to the drawings and FIGURE 1 in particular, will be seen that the invention comprises a pole 10 which is shown as a cross sectionally rectangular structure, although it may also be circular if desired, upon which a platform is positioned for vertical movement relative thereto. The platform includes a seat 11 supported on a pair of

frame members

12, 12 as best seen in FIGURES 2 and 4 of the drawings, it being observed that the seat 11 is positioned on one end of the

frame members

12, 12 and is provided with a cross piece 13 in the nature of a support beneath its forward edge. There are a pair of oppositely disposed

frame members

14, 14 positioned at right angles to the

frame members

12, 12 and in spaced relation thereto and one of which frame members 14 forms a back for the seat 11.

Sides

15, 15 positioned between this frame member 14 and the seat 11 complete the seat structure. The

frame members

14, 14 and the

frame members

12, 12 form a rectangular opening in the platform behind the seat 11 and inwardly of the ends of the

frame members

12, 12 and 14, 14 which opening registers with the rectangular pole 10 as best seen in FIGURES 1 and 2 of the drawings.

A transversely disposed roller 16 journalled at its ends in bearings set in the

frame members

12, 12 engages the front side of the rectangular pole 10 and is disposed beneath the rear portion of the seat 11. A pair of

vertical extensions

17, 17 are positioned on the upper surfaces of the

frame members

12, 12 and between the

frame members

14, 14 and a secondary roller 18 is journalle d on bearings disposed in these vertical extensions 17 near the upper ends thereof and arranged to engage the back of the rectangular pole 10. The

rollers

16 and 18 are thus vertically spaced with respect to one another as best illustrated in FIGURE 5 of the drawings. It will be observed that a person seated on the seat 11 will be supported by the platform with the

rollers

16 and 18 appropriately engaging vertically spaced oppositely disposed sections of the rectangular pole Ill and so that the platform, including the seat 11, will be capable of moving vertically on the pole 1% with relative freedom.

The upper end of the pole 1% is provided with a rectangular frame 19, the

ends

20, 20 of which extend beyond the sides of the rectangular pole 10 as best seen in FIG- URES 1 and 3 of the drawings. Sheaves 21, 21 are journalled in bearings positioned in the frame 19 and a cable 22 is trained thereover. One end of the cable 22 is attached to the platform comprising the seat 11 and the other end secured to a reel 23 which is journalled in bearings positioned in the

secondary frame members

14, 14 as best seen in FIGURES 1 and 2 of the drawings. The pivotal shaft of the reel 23 extends through one of the secondary frame members 14 and engages a gear box 24 mounted on a deck 25 of the platform.

The gear box 24 has an input shaft 26 which is connected to the drive shaft of an electric motor 27 also mounted on the deck 25 of the platform. The electric motor 27 has a deck 28 on the opposite end of the drive shaft with respect to the gear box 24 and a brake rod 29 is engaged frictionally against the periphery of the deck 28 and pivotally mounted on a fulcrum pin 30 positioned in one of the secondary frame members 14 as best seen in FIGURES 2 and 4 of the drawings.

The opposite end of the brake rod 29 extends through an opening in the other end of the secondary frame members 14 and into the area above the seat 11 where it can be easily manipulated by the person seated thereon. An electric wire and switch for controlling and supplying energy to the electric motor 27, although not illustrated in the drawings, is provided and the wires are of a length sufiicient to reach from the ground to the top of the rectangular pole as the platform moves thereon. It will be observed that when the electric motor 27 is energized it will rotate the gears in the gear box 24 which in turn will cause the reel 23 to revolve and wind up the cable 22 thereby causing the platform including the seat 11 to move upwardly relative to the pole 10. Reversing the direction of the motor 27 will permit the seat 11 to move downwardly.

By referring now to FIGURES 6 and 7 of the drawings, details of the manner in which the pole 10 is positioned alongside a building will be seen in the diagrammatic figures. In FIGURE 6 a building 31 having a pitched roof 32 is illustrated with sheaves 33 secured to the overhanging portions of the roof 32. A rope or cable 34 secured to a weight 35, or, alternately to the building 31 itself, is positioned upwardly alongside the building 31 through the sheaves 33 which cause it to follow the roof line 32 and downwardly again to a secondary weight 35, or, alternately, to a point of attachment to the building 31. A loop 36 formed in the rope 34 midway between its ends encircles the upper end of the pole 10 which stands upon the ground adjacent the building and in spaced relation thereto. In such position, the platform including the seat 11 may be moved freely vertically so that a person positioned thereon will be in position to paint the side of the building 31. To move the pole 10, the rope 34 is untied from one of the weights 35 and moved toward the other and resecured. This moves the loop 36 sidewardly and the top of the pole 10 moves at the same time. The base of the pole may be then picked up and moved to any position. For buildings without roof overhang the arrangement shown in FIG: URE 7 is employed in which a collar 37 is movably positioned on the pole 10, the collar 37 having a projecting arm 38 which holds the top of the pole 10 outwardly from the wall of the building 39. The same rope and loop arrangement as indicated at 34 and 36 of FIGURE 6 is employed to hold the pole relative to the building and a secondary rope 40 trained over

sheaves

41, 41 of an arm 42 on the top of the pole 10, above the frame 19, enables the position of the collar 37 to be adjusted vertically. It will occur to those skilled in the art that, in addition to the controlling action of the motor 27, gear box 24 and reel 23 and the brake rod 29, safety brakes may be and preferably are provided.

In FIGURES 1, 8 and 9 of the drawings, a preferred form of a safety brake is illustrated and by referring thereto it will be seen that a flexible clamp device comprises a section of semi-rigid cable 43 having its

ends

44, 44 secured to the platform and its intermediate portion loosely coiled about the rectangular pole 10 as best seen in FIGURES 8 and 9. One convolution of the cable 43 is normally supported in elevated relation by a spring urged arm 45 secured to the platform and more specifically to one of the vertical extensions 17 of the

frame members

12, 12 as heretofore described. This device acts with a snubbing action relative to the rectangular pole 10 whenever the platform, including the seat 11, moves downwardly. In order to permit such downward movement, the spring urged arm 45 is depressed manually thereby holding the convolution of the semi-rigid cable 43 in loose engagement relative to the pole It). An alternate safety brake is illustrated in FIGURE 10 of the drawings which comprises a gouge member 46 pivoted to the platform by a pivot 47 and having a serrated end 48 normally urged into engagement against the pole 10 by means of a tensioning spring 49. The safety brakes shown in FIGURES 8, 9 and 10 are so arranged that they will work automatically to prevent downward movement of the platform including the seat 11 unless manually released. Neither requires manual release for upward movement of the seat 11 as they simply slide against the pole 10 when the platform including the seat 11 is moved vertically. In the preferred form of the invention as illustrated in FIGURES 1 through 5 of the drawings and heretofore described the safety brake of FIGURES 8 and 9 is incorporated and illustrated, and it will occur to those skilled in the art that additionally the safety brake of FIGURE 10 can also be used or it can be substituted for the preferred form.

It will thus be seen that a vertically movable scaffold seat and support pole therefor has been disclosed and having thus described my invention, what I claim is:

1. A vertically movable scaffold seat for operation on a vertical pole and comprising a rectangular platform having an opening therethrough through which said pole is positioned, vertically standing horizontally disposed frame members positioned on and secured to said platform on each side of said opening, a winch and means for moving said Winch mounted on one side of said platform, an opposite side of said platform defining a seat for carrying a workman, one of said vertically standing frame members forming a back for said seat, a pair of vertically standing side members positioned on and secured to said platform adjacent said seat and secured to said frame member forming said back rollers secured to said platform in spaced vertical alignment with said opening and arranged for engagement against the opposite sides of said pole so as to position said platform relative to said pole, one of said rollers being positioned between a pair of said vertically standing horizontally disposed frame members, a cable on said winch trained over said pole and secured to said platform and brake means on said platform for controlling the rotation of said winch.

2. The vertically movable scaffold seat set forth in claim 1 and including a safety brake on said platform comprising means positioned around said pole for clampingly engaging said pole upon downward movement of said platform relative thereto and slidably engaging said pole upon upward movement of said platform relative thereto.

3. The combination of a vertical pole and a platform movable vertically thereon, said platform comprising a pair of horizontally positioned frame members spaced to permit said pole to pass therebetween, a pair of secondary horizontal frame members positioned crosswise relative to said first pair of frame members and spaced to permit said pole to pass therebetween, a first roller secured to said first pair of frame members and in vertical alignment with one of said pair of secondary frame members, vertical extensions on said first pair of frame members and a second roller positioned between said vertical extensions and between said pair of secondary frame members and in offset horizontal relation to said first roll, a deck formed on one of the ends of said first pair of frame members and a seat formed on the opposite ends thereof, a winch disposed on said deck, a cable on said winch trained over said pole and having one end secured to said platform and means on said deck for imparting movement to said winch, and a safety brake secured to said platform and engaging said pole, said safety brake comprising a section of cable coiled about said pole with the ends of said cable attached to said platform and means normally holding the convolutions of said cable in elevated relation to said platform.

References Cited in the file of this patent UNITED STATES PATENTS 77,733 Holzer May 12, 1868 182,380 Miller Sept. 19, 1876 275,647 Haines Apr. 10, 1883 1,616,743 Ericsson Feb. 8, 1927 2,112,837 Fisher Apr. 5, 1938 2,725,125 Morgen Nov. 12, 1955