DE8616288U1 - Scaffolding for work on and around pitched roofs - Google Patents

Description

BY KREISLER SCHÖNWA'tD ^: ElSHCM.'D ' BY KREISLER KELLER SELTING WERNER

PATENT ATTORNEYS

, Dr.-Ing. von Kreisler 1 1973

Applicant.» p,..^. ^ _w . EishoM 11981

Friedhold Häßner Dr.-Ine. K. Sehönwdd

^ . , Df.J.F.Füü

Isarstraße 1 Dipl-CUn. AM von

5350 Euskirchen

Dr. H.-K.

DBCHMANNHAUS AM HAUniAHNHOF

0-5000 COLOGNE 1

Sg-DB/my ( June 10, 1987

Scaffolding

The invention relates to a working scaffold according to the preamble of claim 1.

In a known scaffold of this type (DE-OS

33 05 342) ladders are suspended from the roof ridge using the two-leg joint devices. The ladders rest on the roof covering and must be lifted and moved as work progresses on the roof. This is inconvenient and cumbersome. In addition,

There is a risk that the roof covering will be damaged by the movement of the ladders when walking on them and when moving them. To form a horizontal work platform, two ladders are hung next to each other. A triangular frame bracket is hung on one or more rungs of each ladder and a board or similar is placed on the horizontal upper side of two frame brackets, which forms a horizontal walking and storage surface. The work platform is unstable on the frame brackets and the safety

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Phone: (0221) 131041 CASH: SoL Oppenhera jr. & Ge, Cologne (bank code 37030200) Account no. 10760

Tchx: 8882307 doped Dnibdie Bank AG. Cologne (bank code 37070040) Klo. No. 1165018 i Oü^xSiÜ SSb ., ., . ·· ·> ·■ ^'rästgiro Köin (S2 3/Ö10050) Kio. No. 654-500

1ü*xpwr:(0221)134297 *··* ·-·. "j \".','."',.".

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Safety is inadequate« Larger spans between two ladders cannot be bridged with the frame bracket construction. In addition , adjusting the height of the work platform is complicated and dangerous, since after removing the running boards, the frame brackets have to be re-hung individually and then the running boards have to be put back on.

Another known scaffold (US-PS 1 160 721) consists of ladders that can be moved on horizontal rails. The rails are permanently mounted on the roof with the help of angle pieces. Such a

Fixed rail attachment limits the use of the known scaffolding to special buildings whose roof covering allows the attachment of the angle pieces and where the need for periodic roof work is worth the expense. A mobile scaffolding, which is suitable for roofers, for example, and can be taken from one construction site to another, is not provided by this known arrangement.

The invention is based on the object of improving a scaffold of the type mentioned at the beginning so that /' &Lgr; the walk-in work platform can be easily adapted to all

places on the sloping roof surface. This task is carried out by the

of claim 1.

The ability of the ladders to move on the horizontal rails and the ability of the scaffolding carriages supporting the work platform to move transversely to this movement enables the

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inclined roof surface in height and width, so that all parts of the roof are accessible. The scaffolding can be easily assembled and disassembled on any type of gable roof.

OS There is no need for time-consuming fastenings in the roof structure or scaffolding conversions. The roof work to be carried out is not hindered by the scaffolding and risky manipulations by the workers to reach inaccessible places are unnecessary, as the scaffolding releases every place at any time after being moved in one and/or the other direction and makes it easily accessible for the worker.

In an advantageous embodiment of the invention,

seen that the ladders and the two legs of the joint device carry roller blocks, each of which has four length-adjustable supports on which the rollers are mounted, and that the slide rails rest on a roof covering or roof rafters via a rubber-elastic cushion. The joint device with roller blocks on both legs provides support and even horizontal mobility of the arrangement through symmetrical support on the horizontal slide rails in the ridge area, with the rubber-elastic cushions ensuring that the mobile scaffold does not damage the roof covering. The rubber-elastic cushions can be rubber profiles made of foam or foam rubber, which are clamped into a C-profile aluminum slide rail. For weight reasons, the ladders are also conveniently made of aluminum.

Advantageous features of the scaffolding carriage are contained in claim 3. The scaffolding carriage is suspended from a pulling and safety rope, which is used to pull up 35

or lowering the scaffolding carriage with the work platform and for securing it. Additional security is provided by unlockable drop hooks that engage with ladder rungs. The mobility of the scaffolding carriage around mutually perpendicular swivel axes enables the work platform to be aligned horizontally at any angle of the roof, so that the work platform is suitable not only for any roof slope of a gable roof, but also for various types of hip roofs .

V According to claim 6, the joint device has at least

a cross joint that allows the attached ladder to be turned diagonally to adapt to roof valleys or ridges A cross joint is located on both the ridge part and the eaves part of the ladder. If a scaffold is arranged on only one side of the roof, a cross joint is also located on the ridge on the leg of the joint device located on the other side of the roof. to achieve the lever length required to hold the entire structure. \

A particularly important embodiment of the invention '&zgr; is included in claim 5. This training enables

makes it easy to use the scaffold in the eaves area by bridging the gutter or eaves cornice while maintaining the mobility of the scaffold with the help of support wheels rolling on a vertical wall. The support wheel can be fitted with pneumatic tires so that it does not damage the wall surface. The ability to change the length of the support rods allows different angles of attack of the hanging legs of the articulated device to be adapted to the conditions on site .

j

For long ladders, in addition to supporting the upper and lower ends of the ladder on the slide rails, intermediate support can be beneficial. For this purpose, support trestles are provided that have length-adjustable support legs with a ball head that is mounted in a ball socket of a bearing plate that is provided with a rubber-elastic foot part. The length-adjustability of the support legs is advantageous because it enables height compensation between a roof surface that is already covered or battened with covering materials, roof tiles, concrete roof tiles and the like and a roof surface made of rafters that has not yet been covered.

light. In this way, the possible uses of the scaffolding according to the invention are increased.

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The scaffold, which is a simple unit consisting of two ladders, two scaffold carriages and a working platform formed by a walkway, can be multiplied by attaching further articulated devices with ladders. In this case, the scaffold carriage is advantageously equipped with a pivoting double working platform support, which has two brackets that can be tilted / tilted about pivot axes running transversely to the brackets. Each bracket supports one end of a walkway.

and the swiveling brackets allow the working platform to be inclined in the plane of the ladders at an angle to the horizontal. This is useful, for example, for slate roofs in the old German style. In addition, it is also possible to raise two scaffolding sledges supporting the working platform differently on two ladders. In this way, the movement of the scaffolding sledges on the ladders is made easier and the working platform is connected to the scaffolding sledges at every stage of the scaffolding movement.

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The work platform consists of at least one walkway with welded-on locking blocks, which together with fixed or movable stops on the scaffold carriage prevent the work platform from slipping or tipping over. The work platform also has railing support holders on the long side and on the head sides of the walkway. Railings can be fitted into these.

supports to which protective nets equipped with edge reinforcement ropes and safety lines serving as side ^protection are attached. Furthermore

it is possible to insert struts into the railing brackets, which, together with tensioning elements, form a supporting frame for a protective roof made of waterproof material. The protective roof enables work on the roof in all weather conditions without significantly affecting the workers and without, for example, rainwater entering the roof during re-roofing or reconstruction work that requires the roof skin to be opened.

construction period into the roof structure. The tensioning elements

can be designed to be telescopic, so that a

any length adjustment to the conductor length or the

/ desired weather protection area is possible. The over-

Tensioning the support frame with a tarpaulin, e.g. a mesh sheet or similar, can be done either on the roof or on the sides. The structure of the weather protection device also offers a variety of modification options that meet every application.

The drawing shows embodiments of the invention schematically. They show:

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•I II* I ·*·

Fig. 1 is a plan view of a roof on which a unit of the scaffolding is mounted,

Fig. 2 a gable view of a roof with scaffolding mounted on one side of the roof, the working platform of which hangs in the eaves area,

Fig. 3 a gable view of a roof with scaffolding mounted on both sides of the roof, with scaffolding sleds hanging in the eaves area on one side and scaffolding sleds on the other side having a weather protection roof spanning the roof slope,

Fig. 4 is a plan view of a hipped roof with ridge, * ^ on which a scaffold nJLt two units with ridge

connection is mounted,

I Fig. 5 a view of a rolling block as well as a

I 15 Cross section of a slide rail with cushioning,

Fig. 6 is a section along the line 6-6 in Fig.

J 4 to illustrate the side view of a rolling

I bockes and the slide rail,

Fig. 7 a side view of an articulated device 20 with scaffolding carriage and working platform in the eaves area,
I Fig. 8 is a section along the line 8-8 in Figure

I 1 to illustrate a pair of support frames,

Fig. 9 a plan view of a cross joint for

pj Ridge and hehle in the direction of arrow 9 in Fig. 4

25 see,

Fig. 10 is a side view of the cross joint according to Fig. 9,

Fig. 11 is a front view of a ridge support structure for installation between two ladders on either side of a ridge or valley of the roof,

Fig. 12 a side view of a scaffold slide

jj tens,

I Fig. 13 a front view of the scaffold carriage

I according to Fig. 12,

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Fig. 14 a front view of a pivoting double work platform support with two catwalk head ends placed on top,

Fig. 15 is a plan view of a walkway and Fig. 16 is a side view of the walkway according to Fig. 15.

The basic form of the scaffolding, formed from a single unit, consists of two spaced apart arranged ladders 4, each with an articulated

device 5 Over the ridge la of a roof 1 with

V-sloping roof sides are hung and on which

At least one scaffold carriage 8 is movable. The

Scaffolding carriages 8 serve as a support for a work

platform 9, which bridges the spacer between the two ladders 4. The scaffold also includes two slide rails 2, which run parallel to the ridge la or the eaves Id of the roof and are suspended from retaining lines 3. The slide rails 2 are designed as in cross-section C-shaped aluminum profile 2a designed,

in its opening pad 2b made of foam or foam rubber

To connect the horizontal

Slide rails 2 with the holding lines 3 serve eyelets 2c on

r the angled side walls of the aluminum profile 2a.

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Roller-shaped rollers 6f roll on the slide rails 2 and are ball-bearing mounted on two supports 6a of a roller block 6 formed from four supports 6a. The roller blocks 6 are connected to the ladder bars 4a in the area of the slide rails 2 by means of flange profiles 6d and plug or screw bolts 6e inserted through holes in the ladder bars 4a. The _supports 6a are provided with holes 6b for locking bolts 6c, which enable the length of the supports 6a to be changed.

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The axles of the rollers 6f are secured at each end by a nut 6g and a locking pin 6h in the support 6a.

The joint device 5, with the help of which each ladder 4 is hung over the ridge la of a roof 1, has four cranked flat profiles, which in pairs form a leg 5e of the joint device S and whose mutual distance essentially corresponds to the distance between the ladder stiles 4a. The cranked flat profiles can be spread in pairs as desired around a joint axis 5a. Their respective spread position is secured by locking bolts.

zen 5c lockable.

On one leg 5e of the joint device 5 (Fig. 2) or on both legs 5e (Fig. 3), the flat profiles of which are connected by rungs and which can have a length of 1.3 m, for example, there are ladders 4 which extend over the entire height of one side of the roof and can have telescopic ladder stiles 4a. A roll-off locking block 4f can be attached to the lower end of each ladder 4 or the cranked flat profiles of the legs 5e of the joint device 5 (Fig. 7). Depending on the length of the ladders 4 and the static requirements, support blocks 7 are attached between the ends of the ladders. These are attached to the sides of the ladder stiles 4a and have length-adjustable support legs 7c , the free end of which is provided with a ball head. The ball head engages in a ball socket 7d of a bearing plate 7a, which is provided on its underside with a plate-shaped rubber-elastic foot part 7b. The bearing plate 7a can be tilted in relation to the longitudinal axis of the support leg 7c; in conjunction with the

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Locking bolt 6c allows the length of the support legs 7c to be changed, thus providing the option of supporting against a roof covering or the roof truss at any point .

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In order to be able to incorporate sloping sides of a roof 1 in the area of ridges and valleys Ic into the working scaffold (Fig. 41 i«t * ^at the ridge Ie and at the eaves Id a joint device 5 with shortened to approx. 40 cm cranked flat profiles of the legs 5e,

which are equipped with a cross joint 15. The

* Cross-link 15 can be rotated laterally and diagonally. How

Figures 9 and 10 show that the cross joint 15 consists of

two oppositely directed U-shaped brackets 15a, which can be pivoted towards each other via two hinge pins 15d and 15f that are connected to one another in an articulated manner on a rotating piece 15e. The hinge pins 15d and 15f protrude through the web of the U-shaped brackets 15a and are secured by nuts 15a. Two hinge pins 15d and 15f Other parallel forks 15b accommodate the parallel legs of the brackets 15a between them and are connected to them by means of plug or screw bolts 6e with eyelets. The ends of the ladder stiles 4a are also connected via r\ fork-shaped connectors 15c and plug or threaded

debolt 6e is coupled to the two legs of the other bracket 15a.

The support for the ladders 4 lying diagonally on the ridge or valley Ic is provided by the support shown in Fig.

11, which is attached to the ladder beams 4a at the statically required distances using the flange profiles 6d. The support device 16 has support legs 16c, which are similar to the height-adjustable supports 6a of the roller stands (Fig. 8).

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and whose lower end engages with a ball head in a ball socket of a bearing plate 7a, which has a foot part 7b made of rubber-elastic material. The support legs are equipped with holes 6b for locking bolts 6c, which allow a change in the length

of the support legs 16c in relation to the beam 4a of the ladder 4. In addition, through the upper end of each support leg 16c, a locking bush 6c is inserted into a hole 6b of a row of holes in an adjustable, strip-like

H 10 connecting profile 16b inserted. One end of the ! . connecting profile 16b of one support leg 16c is

>'-■■ via a toothed joint 16a to the end of the connecting profile 16b of a second support leg 16c. The joint axis of the toothed joint 16a is formed from a bolt 6e.

On the ladders 4 and/or the part not extended by a ladder, a leg 5e of the joint device 5

j scaffold slides 8 are movable, which are attached to tension and safety

safety ropes 8i. The scaffolding carriage 8 is shown in Figures 7, 12 and 13. It consists of horizontal and vertical frame profile parts 8a. A lower Q angle piece 8x is welded to each of the vertical frame profile parts 8a. Two frame profile parts 8a

are welded to a joint tube which is directed transversely to the ladder 4 and forms a pivot axis 8bb, and two parts are welded to a joint tube which runs in the plane of the ladder 4 and forms a pivot axis 8b at the free end of the angle piece 8x. The frame profile parts 8a are thus movable relative to each other. The lower angle piece 8x of the vertically running pair of frame profile parts 8a is connected to the

C lower joint tube serving as pivot axis 8b

welded to connect the two with a series of holes for

- 12 -

The upper end of each link 8c is connected to the outer end of the pair of horizontal frame profile parts 8a by means of the locking pin 6c in such a way that the horizontal frame parts 8a assume a desired inclined position with respect to the plane of the ladder 4. An example of such a position is shown in dashed lines in Figure 12. The upper and lower ends of the two vertical frame profile parts 8a are connected by means of crossbars.

lü ben, at the end of which axes for receiving

four sliding rollers 8e with inboard, which

x on the spars 4a of the ladder 4. The inner boards

The sliding rollers serve as lateral guidance and prevent

or the scaffolding carriage 8 from slipping off the ladder 4. Furthermore, the two vertical frame profile parts 8a are provided with lateral bolts 81 (Fig. 13) on which pivotable fall hooks 8d are attached. The four fall hooks 8d are each under the action of a tension spring 8d, which each acts on an arm of a lever 8o which is attached to the bolt 81 and the other end of which is coupled to a connecting rod 8p which connects two levers 8o located one above the other. A release cord 8g is connected to the connecting rod 8p, which ·.·,

At the same time, the four drop hooks 8d are pivoted so that they are released from the rungs 4b of the ladder 4.

Triangular brackets are welded to the upper horizontal frame section 8a, of which the one facing the ladder 4 is welded to an eyelet 8h, to which the traction and safety rope 8i for the sliding carriage 8 is connected by means of a snap hook 8k. The middle vertex of the two triangle brackets is connected to an upper one in the ladder '*

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• II II

■ · 1 I

level. A work platform support 8n that can be swiveled to the articulated tube 8bb is welded to the articulated tube 8bb, which is directed transversely to the ladder level. On the inside of the support 8n a fixed stop 8f is attached and on the outside a movable stop 8g with locking bolts for holding the work platform 9 is attached.

The work platform 9 consists of a walkway 9b, preferably made of aluminum, which can have a length of up to approx. 8 m and which has locking blocks 9d welded on at a distance of approx. 60 cm from the head end to limit the displacement of the walkway 9b on the work platform support 8n of the scaffold carriage 8.

Railing support holders 9a are attached to the long side of the walkway 9b using screws 9c (Fig. 15, 16). Railing supports IC made of aluminum tubes with upwardly open eyelets 10c for holding a safety net 11 are inserted into the railing support holders 9a. An upper stop 10b determines the insertion depth of the railing support 10 and a lower opening 10a, through which a bolt 6c can be inserted, prevents the railing support 10 from being accidentally pulled out of the railing support holder 9a. A safety net 11 can be attached to the eyelets 10c of the railing supports 10 as a fall protection device. In addition, safety lines 10d are attached to the eyelets 10c as a side protection part.

If several scaffold units are to be installed next to each other, a double scaffold beam 8r as shown in Figure 14 is used, which has two brackets 8n, which are connected via triangular supports 3v to one another.

Level of the ladders 4 are welded to the transverse pivot axis 8bb (articulated tube). Each bracket 8rt is provided with 35

a fixed stop 8f and a movable stop 8g so that two walkways 9b are mounted on a carriage 8 so that they can move independently of one another.

05

A very convenient way of using the scaffolding is shown in Figure 7. In this case, a second joint device 5 is attached to the lower end of the ladders 4 and the second leg 5e of the joint device 5 hangs vertically downwards.

This leg contains the scaffold slide 8,

'-^ which hangs on the rope 8i and with the help of the drop hooks 8d

has seeped in. In the example of Figure 7,

In order to maintain the vertical position of the second leg 5e of the joint device 5, two adjustable support rods 12a are provided, which are slidably inserted through a bushing 12b in the leg 5e and which each have a pneumatic support wheel 12e on their end facing the house wall 1b. A bolt 12c is used to secure the support rod 12a in the bushing 12b, which can be inserted radially through the bushing 12b and holes 12d in the support rod 12a. A roller locking block 4f is attached to the lower end of the leg 5e.

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A further measure to facilitate the working conditions is that a protective roof 14 (Fig. 3) is attached, which consists of a fabric-reinforced polyethylene film or the like and is attached to a support frame. To install the protective roof 14, struts 13b are inserted into the railing support holders 9a instead of the railing supports 10 and locked in place. The outer struts 13b attached to the work platform 9 at the ridge la and the eaves Id are

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20

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Articulated connectors 13c are attached with locking bolts 6c and locked at the required angle of inclination and connected with clamping elements 13a. The same procedure is followed between the two ends of the work platform. To enable the length of the clamping elements 13a to be changed, these can be telescoped using telescopic pieces 13i. The protective roof tarpaulin 14 is placed on the finished support frame and attached to the clamping elements 13a or vines 13b using integrated loops or eyelets .

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Claims (10)

Registrant: Friedhold Häßner, Isarstr. 1, 5350 Euskirchen EXPECTATIONS Claim 1 ./(Working scaffold for work on and on sloping roofs) characterized in that it consists of at least one or more work platforms (9) with fall protection (10, 11) which are mounted vertically movable by means of scaffolding platforms (8) adjustable by joints (8e and 8bb) via rollers (8c) on ladders (4), these ladders (4) are in turn mounted by rollers (6f) on slide rails (2) which are arranged hanging on retaining lines (3) in such a way that they can be moved horizontally. The scaffolding structure is adjusted according to the roof ridge or eaves angle by the joint device (5) and locked in place by the beams (5e). 2. Scaffolding according to claim 1, characterized in that the ladders (4) and the two legs (5e) of the joint device (5) carry roller blocks (6) which each have four length-adjustable supports (6a) on which the rollers (6f) are mounted and that the slide rails (2) rest on a roof covering or roof rafter via a rubber-elastic cushion (2b). 3. Scaffolding according to claim 1 or 2, characterized in that the scaffold carriage (8) consists of horizontal and vertical ten frame profile parts (8a) and a work platform support (8r), that the work platform support (8r) has at least one bracket (8n) which is connected to a pivot axis (Sbb) perpendicular to the ladder plane,
that frame profile parts (8a) can be pivoted independently of one another in pairs via pivot axes (8b) parallel to the ladder plane and can be supported by means of adjustable links (8c) and that the frame profile parts (8a) support sliding rollers (8e) rolling on the ladder stiles (4a) and the scaffolding carriage (8) is suspended from a traction cable (8i). 4. Scaffolding: according to claim 3, characterized in that
four sliding rollers (8e) with an inner board are provided for lateral guidance and that the vertical frame profile parts (8a) have transverse axes (81) with unlockable drop hooks (8d) which engage with the ladder rungs (4b). 5. Scaffolding according to one of claims 1-4, characterized in that j: , �Lgr; at the lower end of adjacent conductors (4) each Articulated device (5) is provided, the lower legs (5e) of which hang down over the eaves area (f1d) and carry a scaffolding carriage (8) and that the lower leg (5e) of each articulated device (5) is equipped with length-adjustable support rods (12a) running transversely to the plane of the legs, which have a wall support wheel (12e). 6. Scaffolding according to one of claims 1 - 5,
characterized in that - 18 - the articulation device (5) has at least one transverse joint (15) which enables an oblique rotation of the suspended ladder (4) for adaptation to roof valleys or ridges (Ic). 7. Scaffolding according to one of claims 1-6, characterized in _that that uxc LcxuBxii \&iacgr;/ &Zgr;&eegr;&khgr;&agr;&ugr;&igr;&idiagr;&pgr;&Pgr;&khgr;&igr;&igr;&khgr;&bgr;&idigr;&idigr; uüucii iiixu Hxxfc Support frames (7;16) are supported, which have length-adjustable support legs (7c;16c) with a ball head, which is mounted in a ball socket of a bearing plate (7a) which is provided with a rubber-elastic foot part (7b). J 8. Scaffolding according to one of claims 1-7, characterized in that the scaffolding carriage (8) with a double working platform „ carrier (8r) which has two brackets (8n) ' which extends transversely to the brackets (8n) Swivel axes (8bb) are tiltable. * 9. Scaffolding according to one of claims 1-8, « characterized in that &Ggr; the working platform (9) consists of at least one walkway (9b) and that railing support holders (9a) are attached to the long side and the head sides of the walkway (9b). 10. Scaffolding according to claim 9, characterized in that
Struts (13b) can be inserted into the railing support holders (9a), which, together with tensioning elements (13a), form a supporting frame for a protective roof (14) made of waterproof material.