Self locking pulley?

[Jerry]

Is there such a thing?

I want to pull a rope to raise a gate.

Pulley locks it off.

Then pull the rope again to allow gate to lower?

gate is about 20kg in weight

 

[Cowmansam]

Yer there is can’t think what there called though they have a spring in them which when you pull the rope one way it’s moves but the other way it pinches

 

[Hesstondriver]

yes and no !

a cam cleat will allow you lock the rope off tho :

@Andrew will be your man

 

[Cowmansam]

I reckon I’d be looking at climbing things I’m sure I’ve seen them that you pull once they lock and release on a second pull

 

[Fendt516profi]

Pulley Block with Brake and Rope options 20m / 30m / 50m. (GFBP020) - SafetyLiftinGear

Pulley Block with Brake and Rope options 20m / 30m / 50m. from SafetyLiftinGear. Pulley Block with Brake and Rope options 20m / 30m / 50m.

www.safetyliftingear.com

 

[Jerry]

yes and no !

a cam cleat will allow you lock the rope off tho :

@Andrew will be your man

that is a partial solution. But Want to be able to move around to pull and release the gate.

 

[Hesstondriver]

that is a partial solution. But Want to be able to move around to pull and release the gate.

in which case i think you can get them integral to the pulley block so you dont need to attach it to anything

 

[Jerry]

Pulley Block with Brake and Rope options 20m / 30m / 50m. (GFBP020) - SafetyLiftinGear

Pulley Block with Brake and Rope options 20m / 30m / 50m. from SafetyLiftinGear. Pulley Block with Brake and Rope options 20m / 30m / 50m.

www.safetyliftingear.com

ouch. Lot of money!

 

[Jerry]

in which case i think you can get them integral to the pulley block so you dont need to attach it to anything

Ok. I’ll Keep looking

Might nip into the local rope and wire place but it’s mainly boating related so silly money

 

[Hesstondriver]

Ok. I’ll Keep looking

Might nip into the local rope and wire place but it’s mainly boating related so silly money

Sailing Pulley Block, Holt Plain Block 45 With Cam Cleat - Boat Fittings

Sailing pulley block, Holt Plain Block 45 with cam cleat. Line size up to 10mm. Perfect for cruising, main sheets, vangs and control tackle such as downhauls. Designed using composite materials for high performance and low weight. Rope size up to 10mm Load rating 100kg Breaking load 900kg

www.boatfittings.co.uk

 

[Andrew]

Can't say I've ever seen anything like that in the sailing world apart from the ones @Hesstondriver has put up, but you need the right angle from them.

About the only other solution I can think of at the moment, is some one way ratchet blocks and some grippy rope, but don't think it'd work too well.

 

[Nukemall]

Not sure this would be man enough for your intended purpose, but there may be more heavy duty types available. Rope grab pulley

 

[Cowmansam]

Could you not use one of the rope grip things at the bottom and a pulley at the top so you stick it in the clamp thing to hold it open or shut

 

[dannewhouse]

Would something similar to an auto reeler for an air hose be adaptable?
You pull the hose out and let it back fast, it locks roughly where you are, slowly let it in and it will pull all the way in.

I don't know how it could be adapted,
Possibly like a seatbelt mechanism?
So you pull the gate up and drop fast so it locks, pulll the rope again and lower it slowly to the ground?
All these ideas would basically be extra to your rope/pulley but might do the job??

 

[spark plug]

If you could find some stays like this, large enough they would do the job:

Bonnet & Boot Lid Stay Large 300mm

21" (530mm) open, 12" (300mm) closed. Swivelling mount at one end with 8mm holes. 6.5mm hole in sliding section. Single hand operation - Lift to latch, lift again to release. Plated steel. Good quality, smooth action. If your bonnet or boot panel is fairly stiff (e.g. Cobra boot) you may need...

www.carbuilder.com

 

[Tractorstant]

https://www.lewmar.com

Might be something on here, maybe cheaper to employ someone to open and close the gate though!