SK94797A3 - Ladder-supported working platform - Google Patents

Abstract

The invention, relating to mechanical ladders, describes a collapsible working platform which can be suspended at any height on a standard commercial ladder secured to a movable frame (39). The essential feature of the invention is that it combines the advantages of conventional scaffolding, e.g. safe working with freedom of movement and those of ladders, e.g. small space requirements. The working platform accessible via the upward folding, edged base plate (15) is fitted with a fall-guard and can be supported, e.g. against a building wall, via telescopic wall supports (24, 25, 26, 27). The ladder on which the working platform is suspended by hooks on two rungs, is supported vertically on the frame (39) by the struts (41, 42). The frame (39) which can travel on four lockable swivelling castors (47) has horizontal wheels (48) and is fitted with telescopic supports (49) and adjustable feet (50).

Description

Ladder work platform

description

The invention relates to a ladder work platform, in particular for assembly, repair and restoration work on buildings, with a ladder vertically mounted on a traveling frame on which a specially arranged work platform can be hung at any height and the ladder work platform can be supported on the building.

Stav_techniky

A work platform supported by a ladder is known from U.S. Pat. No. 29 61 060. The working platform forms an integral unit with the ladder head, which can be retracted by means of a cable winch. The ladder is mounted vertically on the running frame.

Also a ladder with platform, (US-A-3515243), which can be placed upright on the running frame and is provided with support struts.

In the ladder platform (US-A-1969628), the work platform support is provided with supports mounted on the work platform.

A folding work platform suitable for hanging on a vertical standing ladder is known from GB-A-19817 (AD 1911).

In the previous ladder work platforms, either the work platform is an integrated part of the overall ladder construction, or the ladder is a special construction allowing the work platform to be attached. On the other hand, the ladder working platform described below can be combined with each ladder by means of the said parts.

The resulting advantages over already known constructions are:

1. Flexible usability: By attaching the platform to the ladder bars at any height, any working height from the ground up to the ladder itself is achievable. The ladder working platform takes up little space, as it can be used leaning against the wall or in a free-standing manner immediately in front of the wall. The foldability and ease of assembly, as well as the relatively low weight, allow for low storage volume, good transportability and low assembly time.

2. Safety at work is ensured by the guardrail and the edge of the working platform, which will prevent the tool and material from falling, even the user himself.

3. Production costs are comparatively low, since no special ladder is needed. If necessary, the ladder work platform can be placed permanently or temporarily on a commercially available ladder using the described parts.

The mass-produced light metal ladders extendable by means of a rope, for example, are an ideal base structure for assembling such a height-adjustable working device. However, the folding work platform using the attachments below can be combined with single ladders, either metal or wooden.

The next part of the description relates to the use of a light metal ladder which can be pulled out by means of a rope, which is fixed vertically to the mobile tubular frame frame.

The invention will be described by way of example with reference to the drawings.

Fig. 1 shows a side view of the work platform in combination with a ladder with a pull-out rope, which is built directly on the movable tubular frame base.

Fig. 2 shows a top view of FIG. First

Fig. 3 shows a side view of the hook by which the work platform is hinged to the stalk of the extension ladder.

Fig. 4 shows a top view of FIG. Third

Fig. 5 shows the locking of the hook according to FIG. 3 and 4 in side view.

Fig. 6 FIG. 5 rotated 90 °.

Fig. 7-9 They illustrate the principle of quick connectivity in three views

Fig. Figs. 10 and 11 show the articulated platform hinges

Fig. 12 and 13 show the end connection when the working platform is tilted.

Fig. 14 shows the end connection which parts according to FIG. 12 and 13 are fully connected together.

Fig. 15 Shows a ladder work platform in one of the possible working positions.

In FIG. 1 and 2, a folding work platform in combination with a commercially available ladder with a rope that is vertically mounted on a tubular frame stand is shown to save space. The working platform consists largely of square cross-sectional tubes which fulfill the following functions:

On the square section pipes (1) and (2), both of which are rigidly connected to the vertical pipes (22, 23), double hooks (3) and (4) are attached, which are hung on the ladder extension of the ladder (5) and they attach the work platform to the ladder in the correct position. The ends of the pipe (1) are provided with clamps (91, 92) which form the center of rotation for the pipes (6) and (7) with the cross pipe (12) and for both the inclined pipes (8) and (9). The two bolts (93, 94) of the pipe (2) form a center of rotation for the pipes (10) and (11) which are connected by a transverse pipe (13) on which the hinges (14) of the tipping floor (15) are attached. The joints (16, 17) form a connection of the pipe (6) and (7) to the vertical pipes (18) and (19) directly next to the cross tube (12). (See Figures 10 and 11 for details). The connection of the pipe to the square cross-section (8, 9), (10,11) and (18, 19) of the quick couplings (20, 21) is shown in detail in FIG. 12, 13 and 14.

In FIG. Figures 3 and 4 show the upper suspension (3) of the work platform, the flat steels (72) and (75) being gripped from the back of the ridge (76) and the ladders (73) and (74) are spaced from the ladder and lateral distance from the beams (77, 78) so that the guide (79) as well as other parts of the ladder mechanics are not blocked. The lower suspension (41) has the same function.

In FIG. 5 and 6, a latch (80) is shown which automatically engages in the locked position when the hooks are suspended.

The floor (15) consists of a special weather-resistant and non-slip board, with attached light metal brackets (60), which serve as a protection against slipping of the tool as well as a reinforcement (see Figs. 1 and 2) and lie on supports (32, 33) and (34, 35), which are always attached to the lower edges of the tubes (10, 11).

The horizontal pipes (6, 7) and (10,11) serve to accommodate the retractable wall supports (24, 25) and (26,27), which can be fixed with wing screws (28, 29) and (30, 31) (details) 11 and 12).

The retractable wall supports (24, 25, 26, 27) can be freely extended to suitable support points of the building.

The tubular frame stand (39) carries the above-described superstructure on four lockable adjustable rollers (47). Both horizontally arranged rollers (48) are used to allow the ladder working platform to be easily moved on the wall.

To secure the ladder working platform, there are two extendable supports (49) in the tubular frame (39) consisting of two tubes with a square cross-section which safely support the entire structure in the working position when the height adjustable locking legs (50) have been extended.

To limit the travel of the withdrawable part, the supports (49) are provided with a stop (51) which stops at the screws (52). At points (53) and (55), the extended lower support can be locked, which is also arranged for both pairs of supports.

The tubular frame (39) is so arranged that both the supports and (49) with (50) can be retracted from the other side and secured with screws (54). This makes it possible to use the ladder work platform in a completely free-standing position, for example when working on the ceiling of halls or on gutters with overhanging roofs.

The legs of the extension ladder (37) are inserted into two holders (38) which are welded to the traveling tubular frame (39) and secured by two shims (40) which are screwed together via the lower ladder.

The first part of the pull-out ladder (37) is connected without play by two diverging reinforcements (41, 42) from the assembly tube (44) on the ladder head of the ladder part (37) by quick couplings (43) to the frame (39). The reinforcements (41, 42) are connected to the ladder by means of a pipe (44) which is provided with a threaded bolt on both sides and its length is chosen so that the reinforcements (41, 42) do not interfere with the travel path of the working platform. The assembly tube (44) is two threaded bolts (56) which are hinged in both sides of the ladder shaft by means of a plastic housing (46), screwed through the holes (44) through the nuts (45) with the ladder (37).

When assembling the extension ladder (37) with the base (39) and the stiffeners (41, 42), it was first possible to screw the tubular frame (39) onto the lying ladder through the bracket (38) with the shelf (40) and then install both stiffeners (41, 42). (42) quick coupling (43). The working platform can then be hung on the lower stalk of the extension ladder (5) when the lower half of the total extension path is required or on the upper stalk when the upper half of the total ladder length is to be contained. Thus, there are two positions for suspending the work platform, but by means of which the entire working range of the ladder can be used. Of course, in most cases, the overhang of the work platform will be saved, since a full working range can be reached by extending the ladder from one of the two suspension positions.

The mounted work equipment now stands up and can be moved freely using the adjustable wheels (47). At the selected workstation, the ladder working platform is secured by braking the adjustable wheels (47) and the support legs (50) and the working platform is lifted from the ground to the desired working height using a rope. The user climbs the upright ladder (5), lifts the tailgate (15), which locks in the folded position (latch (57)). The user climbs the ladder stalks through the open floor two stalks above the floor level and, using a thin cable (61) that holds the tipping floor, lowers the raised floor and can enter the platform (15). With the extendable wall supports (24, 25), the working platform can be supported on the building as required, thus eliminating its swings.

When the user climbs a short cable holder (61) off the floor, he steps up two ladders · the ladder slips through the hole (58)

- 6 in the floor until the bracket lifts the floor plate, which tilts and locks with (57). This will release the descent.

Claims (10)

PATENT REQUIREMENTS z ^ z- ^ z platform, work on working restoration (37, 5) stand vertically (38, frame A ladder repair and wherein a ladder foot ladder is secured to a work platform by means of a ladder bracket (41, 42), said ladder foot (37) being supported by a bracket (38) with stiffeners (41, 42) opposite the ladder foot (37) by means of the spacers the planes stalks that the working suspension (4) and that one of the suspensions that by the suspension and 40) and a ladder wherein the ladder reinforcements and above especially for assemblies, buildings or the like, on the running frame (39) and 40) and the head and ladder reinforcements are provided with one edge (37) is vertically between and the frame (39) supported by the frame (39) by the legs (44) parallel to the ladders and thus always perpendicular to the bars and the ladder edges are connected protruding through the braces (41, 42) plane of all ends at the ends of the spacers (44), the platform is provided with a top suspension, the bottom is equipped with a lock, (3, 4) the working platform can be hung at any height on two ladder blades that the working platform can be supported by wall supports (24, 25, 26, 27) is supported horizontally against a building wall or similar object and is provided with a floor tilting plate (15) and that the running frame (39) on the side of the frame on which the ladder is standing is provided with vertical supports (49). ) and support legs (50). A ladder working platform according to claim 1, characterized in that the stiffeners (41, 42) at their upper attachment points are fastened by means of a mounting pipe (44) spaced from the ladder and the mounting pipe (44) is connected to the ladder by bolts (56). ) which extend into the hollow tubes of the stalk by means of an adapter sleeve (46). The ladder working platform according to claim 1, characterized in that at least one of the flat steels (72, 75) connected to the suspensions (3, 4) is provided with a self-acting lock (80) and the suspensions (3, 4) are thus formed. The working platform is secured to the ladder (5) by means of flat steels (72, 75) and angles (73, 74) for both spacing and displacement that the extension ladder mechanism is not limited in its function. 4, characterized in that, in order to climb out, the hinged floor plate (15) is provided with an edge (60) as well as two hinges (14) and more with supports (32, 33, 34) attached to the lower assembly tubes (10, 11). 35), at least one opening (58) for a cable (61) for raising and lowering the tilting floor (15) and a lock (57) for the tilted position. The ladder working platform according to claims 1 to 3, characterized in that the working platform tube (1, 2) is provided with bolts (91, 92, 93, 94) which form the centers of rotation for the tube (6, 7, 8). 9, 10, 11) and are bolted together with lock nuts so that the work platform can be stacked economically for transportation and storage and thus slid into the free space of the running frame (39) to minimize the space required for storage. 5, characterized in that the wall supports (24, 25, 26, 27) incorporated into the work platform at the height of the floor tilting plate (15) or at the height of the pipe (6, 7), optionally extended and locked to support the work platform against the building wall or similar object. A ladder work platform according to one of claims 1 to 5 A ladder working platform according to one of claims 1 to 6 Ladder work platform according to one of Claims 1 to 6, characterized in that the traveling frame (39) is moved on four adjustable rollers with a locking device (47) and is provided with two extendable tubes (49) for running parallel to the building wall. the outrigger stop (52) and the stop (53) as well as the height adjustable legs (50) as ground supports, which can be adjusted and secured to the vertical ladder position. 7th A ladder working platform according to claim 7, characterized in that at least two transversely extending supports are arranged on the frame-side traveling frame (39) opposite the ladder. The ladder working platform according to one of Claims 1 to 4, characterized in that the quick couplings at the positions (43, 20, 21) operate during the assembly of the stiffeners (41, 42) and / or the stiffeners. when connecting the end points (20, 21) according to the following principle: a bolt nut (65) is screwed onto a welded bolt (63) and a pin (64) secured by a pin (65) is inserted into the keyhole hole (66). displacement over the welded flat material (67) with a small number of revolutions of the lever (65) securely and free of play connects the two parts (68) and (69) to be joined, while the lever nut (65) cannot be displaced by the lever open. The ladder working platform according to claim 4 or 9, characterized in that the end points (20, 21) are closed by two quick couplings for folding the working platform, the pipe (10, 11) and (18, 19) having the inclined pipes (8). , 9) are only joined together by both screws from (20, 21).