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Anonymous Poster

Loading a Spring-loaded, Self-leveling Lift

08/22/2006 7:15 PM

Anonymous Coward writes:
I have a spring-loaded, self-leveing lift that raises as materials are removed from it (mostly for ergonomics). I am looking to keep stacked, flattened boxes on the lift so they can be taken off and assembled at the beginning of an assembly line. The only problem comes in loading the lift. The boxes start on a pallet, about 500 at a time, and I need to move them all, hopefully at once, onto the lift. It is pointless to move them in small stacks, like 20 at a time, because then I may as well not use the lift. The problem I have is that the lift does not lock in the upright position, it starts going down right when something is placed on it. One idea I had was to roll the lift near the pallet, pick up the pallet with a forklift, slide the boxes 1/2 way over the lift (so the weight is still almost comletely on the pallet), lower the forklift so the spring lift is pretty much fully compressed, then slide the boxes the rest of the way on. I think this will work pretty well, but I want to get some feedback before I break something (or myself). Anybody have any ideas? Thanks.

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Join Date: Aug 2006
Posts: 22
#1

spring loaded lift

08/23/2006 4:44 AM

redesign your lift.use a hydraulic cylinder coupled to a gas charged bladder accumulator, or a piston accumulator.place a valve with open /closed postions on the hydraulic line near to the lift. to lock the lift in postion - close the valve.there are manufacturers producing lift cylinders which incorporates the accumulator, but I don't recall manufacturers name.

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Anonymous Poster
#2
In reply to #1

Re:spring loaded lift

08/23/2006 9:08 AM

Why not just placing the whole pallet on the lift? If you can compensate for the higher load from the pallet, then you just slide the pallet off when you are finished and put a new pallet on the lift.

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Anonymous Poster
#4
In reply to #1

Re:spring loaded lift

08/23/2006 11:29 AM

Sorry, no cheating allowed.. Can't afford to 'redesign' the lift--not enough time/money

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Good Answers: 18
#3

Sping-loaded lift

08/23/2006 9:13 AM

Can you rig up some small diameter aircraft cable over pulleys on axles with brakes to attach tare weights for the weight of the pallet so as to maintain the proper amount of displacement per box as well as to provide a means to gently lower?

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Anonymous Poster
#5
In reply to #3

Re:Sping-loaded lift

08/23/2006 11:32 AM

Hm, not 100% sure what you're saying, but I get the idea. And I don't quite think it will be feasible to rig up any aircraft cable to accomplish this. I am looking for the easiest solution that involve as little 'rigging up'/alteration as possible. I appreciate the response though

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Join Date: Aug 2006
Posts: 14
#6

Gas Springs

08/23/2006 12:36 PM

I would try a Gas Spring. Stabilus makes one called a Bloc-O-Lift. It is designed to be rigid and lock when extended. Then you just have to press an actuator that will release the gas spring.

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Anonymous Poster
#7
In reply to #6

Re:Gas Springs

08/23/2006 11:21 PM

Can you put the whole pallet on the lift with the fork?

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Anonymous Poster
#8
In reply to #7

Re:Gas Springs

08/24/2006 11:08 AM

No, I am trying to save space, so putting the whole pallet on the lift would somewhat negate the whole thing.

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Join Date: Sep 2006
Location: Allentown, Pa USA
Posts: 46
#9

safety first

09/10/2006 6:27 AM

The actions of trying to slide the load onto the lift are reckless and will meet with failure at some point when the load gets past the halfway point the lift will start to drop and the other end of the load will be suspended from the floor causing the load to tilt. All you can really do is pick up the load from the top. You will either need to band the load strongly enough to lift by the banding or extend the lifting point by running ropes through the pallet. A small investment in creating a permanent lifting attachment such as a durable harness is in order. Give me a budget to work with and I will design you something appropriate.

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Join Date: Mar 2006
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Posts: 46
Good Answers: 1
#10

Re: Loading a Spring-loaded, Self-leveling Lift

09/16/2006 12:07 AM

cheap trix, add a spring loaded latch much like a dead bolt. When lift is in full upright position, lock in place, load, trip latch....to easy maybe...

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