WO2009019716A1

WO2009019716A1 - High altitude safety - gear

Info

Publication number: WO2009019716A1
Application number: PCT/IN2008/000059
Authority: WO
Inventors: Mathew Zakariahs
Original assignee: Mathew Zakariahs
Priority date: 2007-08-03
Filing date: 2008-01-31
Publication date: 2009-02-12

Abstract

The device is useful for safe working at high attitude. The devise provides, automatic winding of the nylon belt after disengaging it from the bell on workers body and provides mobility to the worker in area of 10 Mtr Radius. In case of fall the gear wheels on Top Guide rollers ( Anticlockwise rotation ) get locked with gear wheels of winding drum ( Clockwise Rotation ) Stopping further rotation of winding drum and slipping of nylon belt providing complete safety to the falling worker.

Description

HIGH ALTITUDE SAFETY - GEAR

This invention relates to safety while working at high attitudes

Presently worker wears safety belt with 1.5 MTR length, while working at high 'attitudes.

Draw baeks of these safety belts are:

1 ) Mobility of the worker is restrieted to 1.5 Radius.

2) This restricted mobility compels worker to frequent hooking and unhooking of the safety belt end as he moves beyond 1.5 MTR, Causing fatigue

3) Worker is tempted to discard safety belt, throwing Safety to wind.

Above draw backs are countered by using " High Attitude Safety. Gear," since

1 ) It has 10 Mtr. Long belt enabling worker to work in area of 10 Mtr. radius without switching of hook Location.

2) When disengaged from the safety belt on worker's body, the belt gets automatically wound over the winding drum due to spiral spring provided on the winding drum

3) In case worker falls from any height the belt gets locked automatically preventing any further slippage of the belt.

The device comprising aluminium body which houses winding drum, spiral spring 10 MTR nylon belt with buckle, gearqd wheels. Floating Top guide rollers with nylon gears, two coil springs on which the floating top guide rollers rest. As soon as the human body weight is exerted on the belt in case of fall, the floating Top guide rollers come down compressing the coil springs and nylon gears on the lower Top guide roller which have anticlockwise rotation mesh with those on winding drum having clockwise rotation stopping any further rotation of the winding drum.

• Aluminium - alloy body could be of any other suitable ferrous or non ferrous material.

• Bushes for shafts are of Gunmetal but these could be of white metal lined bushes or ball . bearings

• Shafts are hardened steel but they could be of any other steel.

• Nylon gears are used but these could be of- any ferrous, non ferrous or other suitable plastics.

• Nylon belt is used but any other suitable material can be used.

• Top and bottom guide roller arc nylon rollers but these could be of any other suitable material. To assist with the understanding of the invention reference will now be made to accompanying drawings, which show one example of the invention.

Fig. 1 shows isometric view of "High Altitude Safety Gear" where F is the casing in which Floating Top Guide rollers and coil springs are housed. This comprises Nylon gears on Top Guide Rollers. Nylon rollers shafts and bushes Coil Springs enable to maintain 10-12 mm gap between the lower Top guide gears and winding drum gears.

Fig 2 is sectional front view:

1) Tope guide rollers 2) bushes for shafts 3) Shafts for guide rollers 4) Nylon gears on Top guide rollers 5) Nylon gears for winding drum 6) Coil springs on which Top Guide Floating assembly rests. 7) Shaft for winding drum with keys. This shaft is fixed. 8) Winding drum with spiral spring. 9) Aluminium Alloy body 10) Lower guiding rollers 11) Nylon belt 12) Hook

Fig 3. (11) Nylon belt

Fig 4 shows Floating Top Guide rollers with coil springs

Fig 5 - shows the locking of Top Guide roller gears with winding drum gear with coil spring in compressed condition.

Fig 6. shows that nylon belt is taut on Top & bottom guide rollers. Detailed description of preferred embodiments.

Fig 1 isometric view of High Altitude Safety Gear shows hook at the top which is to be engaged at desired location in working area.

This has basically a winding drum with gearwheels Spiral spring of which one end is fixed with the drum and other riveted to 10 MTR Nylon rope which remains wound on the drum due to spiral spring Tension.

The winding drum rests on a fixed shaft with both ends of the shaft keyed. Nylon rope end is passed through Top guide rollers and then through bottom guide rollers and has hook at the end which can befitted to safety belt on worker's body (Nylon Rope 11 in fig 3)

Fig 4 shows assembly of Floating Top guide rollers with geared wheels, coil springs which enable to maintaining gap of 10-12 mm between Gear wheels of guide roller and gear wheels of winding drum. Gear wheels on winding drum rotate in clockwise direction whereas gear wheels on Top guide rollers rotate in anticlockwise direction. Now lhe worker can safely and freely work in a radius of 10 M I RS. After finishing the work the belt is disengaged from the body belt and belt gets wound on the winding drum automatically due to Tension in the spiral spring.^"

In case of fall of a worker the gravitational force due to body weight on the belt brings down the iloating guide rollers compressing coil springs and the gear wheel of lower Top guiding gears get meshed with gear wheels on winding drum. Guide roller gears rotate in anticlockwise direction where as those on the winding drum rotate in opposite direction i.e. clockwise.

Thus the winding drum is locked preventing any further downward slipping of the Nylon belt. Making the belt taut on Top & Bottom guide rollers (ilg. 5 & 6)

Fig 5 - Shows coil springs compressed and Top guide roller gear wheels meshing ( locking ) with gear wheels on the winding drum.

Fig 6- Shows nylon belt is taut on Top & Bottom guide rollers.

Claims

Claim,

1 ) High Attitude safety - Gear comprising, winding drum with spiral spring, nylon belt, Geared wheels. Top and bottom guide rollers with geared wheels, eoil springs all housed in aluminum Alloy easing body having hook at the I op.

2) The deviec as claimed in claim 1 where in the spiral spring fitted on the drum enables automatic rewinding of the nylon belt after disengaging the belt from the workers body belt.

3) The floating Top Guide roller assembly which rests on the coil spring which maintain the gap between Gear wheels of Top guide rollers and gear wheels of winding drums enable to freely unwind the nylon belt providing mobility in 10 MTR radius working area.

4) The floating Top guide rollers in case of workers fall come down instantaneously due to gravity tauting the nylon belt and locking the movement of winding drum thus stopping any further slippage of nylon belt and keep the worker sale from the fall.

5) The High Attitude safely - Gear substantially as herein described and _^illustrated in the 1 figures of described and illustrated in the figures of accompanying drawings