how to make a manual elevator
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how to make a manual elevatorI couldn't justify one of those commercial deals but scouring the net revealed an interesting design that I borrowed. No measurements just some pictures on wo. A shop full of tools, a boat, race car, 3D printer and a beautiful wife who wants me to invent things for around the house. Now how cool is that?By going up. Revenge can be sweet:) Still, I wish it had more room in the new shed. After I completed the new floor, and within an hour of struggling to get a heavy box up the ladder, I was busy designing and making an elevator. All the while nursing a sore back that lasted a week. Add Tip Ask Question Comment Download Step 1: Preparation: After drawing up a number of ideas, I settled on one that took up the least amount of space. The ladder was already in place and I had left additional space in the overhead to fit bulky materials, so I decided that would be the best place to locate the elevator as well. If you went to school before the 90s, chances are you've seen one. The drawing board rig keeps the platform perfectly level in one direction. I could have placed another just like it facing the opposite direction, but opted instead for a simple bridle that keeps things steady as long as the load is somewhat balanced. I purchased all the parts I needed at our local hardware store. I chose 2 sizes of line, which is a bit of overkill. Add Tip Ask Question Comment Download Step 2: Rigging the Lifting Portion: The elevator uses 2 rigging systems. The first is the hoist. This is the one that lifts the platform and lets it down again. It employs a single, 50' line and 9 pulleys. What you'll need for the basic elevator: 50' of line (you shouldn't need all 50', but it will be more that 25') 7 pulleys 5 heavy hooks 2 heavy rings 2 shackles Screws and tools for mounting it all Start by fitting and building the platform you'll use for your elevator. My platform is 2' x 4'.http://www.atelier-dasse.com/userfiles/engineering-economy-15th-edition-sullivan-solution-manual.xml
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Every situation will be different, but suffice it to say, you'll be cutting open a section of decking in your loft or floor and will need to support it with appropriate lumber and joist hangers. I cut a 4'x4' opening, half of which is used to house the platform. The other half holds the ladder. Add Tip Ask Question Comment Download Step 3: Stabilizing Rig This is a separate rig from the hoisting rig. It's sole purpose is to keep the platform level as it's being raised and lowered. Here's what you'll need: 1. Line. A 25 foot bundle should be enough. This doesn't need to be as strong as the lifting line, so you can save some money here. 2. Pulleys. 4 of them. The same goes for the pulleys. You can save cash by reducing their size. There's some stress on the line and the pulleys in this rig, but it's constant and not related to the weight of the load.Very simple and very reliable. The negative with this rig is it's always present, whether the platform is up or down. In my shed, I wanted this rig to be as out of the way as possible. I mounted it next to the ladder. A good compromise in my case. The ladder backs up to storage racks so it's underside is dead space more appropriate for storing items that won't be needed much. When mounting the pulleys, try to get them as square as possible and as close to being in line with one of the longer sides of the lift as you are able. The other vertical side passes the platform in the middle of the rope, so a simple clamp will keep it locked in place. I pulled an old bronze sailboat winch out of storage and put it back to work. There's a matching piece attached to the top half of the 2x8 that defines the opening. When these two meet, it stops the upward movement of the platform.I'll fix this as well. Add Tip Ask Question Comment Download Step 5: Update: After mulling it over, I decided to re-think my priorities and went back to my shed and eliminated a few pulleys from the system.http://holidaypackagesegypt.com/electronic-digital-safe-with-lcd-display-manual.xml I managed to reduce the number of pulleys from 9 to 6, reducing the friction in the system by about 30. First, the bad news: The line no longer runs through a clean system, devoid of wear points. The 4 pulleys that changed the lines direction from left-to-right and top-to-bottom is now done with 2 pulleys. Because the line's angle from the top pulleys to the bridle changes slightly as the platform goes up and down, the line that goes through the pulleys used to change direction moves from side to side as well, making contact with the pulley's steel frame.But hey, it's a shed. I also had to lower the bridle height at the eve side of my platform. This takes a bit of stability away, but nothing I can't live with. I use stopper knots to tie off the bitter ends of line that run through fairleads and eyes. They don't add weak points to the line and are very easy to untie. Basically, a stopper is a granny knot with an additional loop around the standing part of the line. Good news is, I now have 3 additional pulleys to play with and the platform goes up with less effort and comes down without any effort whatsoever. Another area where friction can appear is in the line itself. Braided line is smooth and runs through pulleys easier than laid line will. If you use braided, try to find some that has colored fibers woven into it. Besides looking pretty, the contrasting colors makes it easier to tell if the line is twisted. The photos of the line in my system show what happens to twisted line. All these lumps trying to squeeze through the pulley blocks adds a lot of friction. Untwist your line when you rig it, and check it once in a while to insure it isn't causing you grief. If your system seems to be getting harder to work, check your lines for twist. Hoe you enjoyed this. Hey! Why not download my FREE iPhone app. Everything you wanted to know about me. Ain't that exciting? Here it is. Add Tip Ask Question Comment Download Did you make this project. Share it with us!https://skazkina.com/ru/3m-942-bookcheck-manual I Made It! Recommendations Generative Art Bike Paint Job With some modifications and a motor, one can make an elevator bed. Popular in Europe, not so big yet in the USA. 0 Darr247 I will be using this system multiple times to maximize the yield of my indoor small space gardening. Ceiling space utilization would really help. I will be sharing this with my Fb group Chocoholics Unite. I want to help as many as I can to lose weight, feel great, and EAT DESSERT while eating their way to good health on the cheap.I'm thinking about adding a garage door opener to automatic it a bit. Although I'm not sure how much it can lift. Are the drawings available for down loading. That would give me a good start on a gambrel style garage. That is why garage doors have springs on them. You'd be better off using a powered winch.Can you help give any ideas how this would work. How would you increase safety. My majour concern is safety: having heavy conterweights or bed above his play area isnt ideal. I am planning on raising a diorama to the garage ceiling due to space limitations. Hope I can finish it before summer. 0 MarcD113 I'm going to try to build it, but not before next fall. Thanks for sharing. 0 StevenV55 As soon as I saw your pulley system elevator and that you are an engineer I thought that I might ping you for some advice. I've been looking around online for a counterweight pulley system to hoist furniture etc. (and afterwards build a dumbwaiter type system) to my newly built home office on the roof and I can't find anything that doesn't involve mechanised options. I can't even get a basket of washing up those stairs. So at first I settled for a luff tackle system suspended from a double pipe, which I used which the builders used to hoist cement bags etc. up by hand. It worked fine until they tried to add one extra bag of cement (around 75Kgs I think) and the pipe bowed. It did not break fortunately but after that they resorted to getting an electric winch for the stones etc.http://flaviaflores.com/images/braun-multipractic-hand-blender-manual.pdf While the manual pulley is handy, it is hard work, even with the weight reduced by a mechanical advantage of 3, but there is always the risk of letting the rope go or something happens and then whatever you're hoisting crashes down into the yard and probably right into the well (which is beneath the internal yard). So now I am thinking of getting permission from my neighbour to install a 3-H or wide flange steel beam (I think they're the same thing) from my end of the internal yard to the other end of the yard (the wall that both my neighbour and myself share) on the roof and then construct a counterweight pulley system. I was also thinking of adding an additional safety rope-type system just in case the primary system fails. The first 3 are from when the builders were using their mechanised one and the last one is the only one I found on my computer that shows my luff tackle, on the very edge of the photo. All you can see in that photo is the pipe and the top two-pulley tackle, which was originally used by the navy. You can actually see the bend in the pipe. Thanks for any help mate. Steven 0 StirK1 I think most people would just climb a ladder and get extra hands to help bring things down, but obviously installing something like this would make the job so much easier. I'm actually surprised that no one else thought of something like this before. I imagine the moving platform must have saved you tones of backbreaking climbs already! 0 futuregeneration1 This gives me enough detail information for my same issue only different need. I am looking to hoist a sailboat into the rafters of my carport. This season's solution put too much effort on balancing the boat. If I can hoist from a four point system it should stablize much better. 0 UdyRegan We're using a pulley system for an attic and it can be quite a fair bit more tedious! 0 angelderrick I am completing my 12 x 24 shed and have been searching for the type pulley you used and cannot find them.https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/162846d1bc5922---bultaco-service-manual-pdf.pdf Can you please direct me to a source. Thanks so much! My plan is to use a 12 volt starter motor to winch the platform up and down. What do you think? I've added a couple of pictures of my setup. An internet search of those names will get you to where you need to be. I'm in the States and every hardware store should them, but any big box store should carry a full line of pulleys as well. I opted for the stamped metal type. They cost a little more, but don't make me wonder if the casting is going to crack while I'm underneath. Someday, maybe. My platform only has an area of a few square feet, but a larger platform, holding more weight may benefit from power. I'd think a starter motor, if strong enough at all, would have to be geared down pretty far to overcome the forces. The lift speed would also be slowed down quite a bit. When I was building mine, I was thinking of a powered boat winch (powered in both directions. Freewheeling on the downward cycle could prove to be exciting in a bad way:). There might even be enough cable wrapped inside to eliminate the lifting line entirely. Good luck with yours and I hope this helps. Mine has been intermittently used for over 2 years now and still going strong. 0 bfk Placing the stabilizing lines against a wall would work well in a garage. Why not motorize it? 0 caarntedd I have a large storage area above my garage. Guess how I'll be moving heavy or awkward stuff up and down from now on. Thanks for the ideas. Nice work. More Comments Post Comment Categories Circuits. Also if I wanted to build one of these things how many parts are still available and how many would have to be custom fabricated. I will leave you with a video of a hand elevator being operated note how the car stays stationeary when he stops pulling.Instead of using the stairs, we found that there was an elevator - hand operated, though. We opened the lift-by-hand gate and filled 'er up to the point that we could just get one person on to operate it.ais-rus.com/ckfinder/userfiles/files/9170-powerware-manual.pdf No one had ever operated a hand operated elevator before, but this one had three ropes. Our downward astronaut found the brake was stuck, so he gave it a yank, and it released. He came down instantly in a cloud of dust. We figured his velocity was about 1 story per second. We took the stairs, and found that the elevator had a large CONDEMNED-Do Not Operate.We figured that the elevator was as old as the building, probably about 1900 - 1910 or so.At first glanceI don't see anything about Sedgewick but you might find some information you can use here. Internet Archive Search: Hand Elevator There are also other thrads on this forum about Otis elevators if you search for them. I am out of time for now. Regards, JimI did manage to find a patent but alas I can't visualize it working. Patent US1548735 - MURTHA - Google Patents They were in business into the 1990's. Their old plant was vacated, and the area along the riverfront is now an oh-so-cool park with the usual yuppified development. This would produce an axial movement and could release a set of friction discs which would otherwise lock the hoist sheave. Both of these mechanisms are used in manual chainfalls to hold the load. A few years back, we were up in Geneva, NY to visit our son when he was at Hobart College. Seemed some contractor was renovating or altering an old commercial building. They needed to get their forklift to an upper story, so pulled it into the elevator along with a load on the forks. This overloaded the elevator, and before it was over with, they succeeded in getting at least one man seriously injured, the forklift and the elevator jammed against the car bumper in the basement, and some other damage. I think they had at least two guys with the forklift in the elevator, one guy to steady the load on the forks. Not sure what happened, but it sounded like the emergency spring brake did not hold when the car started to fall.http://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/162846d362ba5e---bumed-manual-of-medicine.pdf I remember thinking about the situation, feeling bad for the injured men, and thinking about what a--holes were running the job. I've walked by jobs where home builders, even some commercial jobs in NYC, were working and their standards of jobsite safety were far lower than what we hold to at the powerplant. Still, a good worker will take stock of the job and the surroundings before proceeding. It's like walking into an abandoned building, you can safely assume that someone may well have removed the stairs or the basement is flooded and proceed with that mindset rather than charging in like it was a going concern and the building was in good condition. A good worker takes stock of the job and the surroundings, looks for routes to move a load thru, where to hang chainfalls, where to tie off if he is using fall protection, and similar before going to work. OTOH I went up and down in it with Ed Battison years ago. He had used it to move lots of heavy machinery to the second and third floors of the museum.As far as I know they still use it.It was used by FDR to move in his wheel chair from one floor to another.I went up and down in it with Ed Battison years ago. He had used it to move lots of heavy machinery to the second and third floors of the museum. The guy would step onto a platform just big enough for a man, pull on the rope, and disappear straight up to the top to check on things and a couple minutes later back down he came. I thought it looked like fun and was standing on the platform checking it out when he discovered me and shouted at me to get off and DO NOT step on the foot pedal. The man lift was simply a platform counterbalanced perfectly for a 200 pound man. Had I stepped on the brake release it would have launched me to the top. I expect OSHA outlawed those things eventually.Everyone I have talked to (and I have talked to people who repair locomotives and heavy machinery) can't seem to figure it out.https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/162846d50b80bb---bumed-manual.pdf Just watch this video How it Works: Chain Hoist - YouTube they show that there is a ratchet and pawl but then say that a clutch some how magically bypasses this in the down direction.Basically the load turns the screw in a direction that tightens the brake. When the operator turns the crank to lower the load, this loosens the screw mechanism. As soon as the brake starts to slip, the load starts to tighten the brake again. When you continuously lower the load the screw mechanism basically keeps just enough force on the brake to cause the load to descend at the desired speed. It's a bit hard to explain in more detail but very simple if you see it operating. Picture a nut and bolt with a brake disc keyed to the bolt shaft. The nut on the end of the bolt pulls the brake disc up against a friction plate fixed to the mechanism's chassis. The load is set up to want to twist the bolt head clockwise. The handle, in order to lower the load, turns the nut counter-clockwise. It's easy to hold the nut still and cause the bolt to tighten up and stop the load. Also it only takes a relatively small amount of torque to loosen the nut, allowing the load to turn the head a little more until the brake tightens back up again. Now you just need a pair of one way clutches so that your handle applies the torque to the bolt shank instead of the nut when you want to raise your load. The nut will then automatically loosen the brake when you start to raise the load. You will also want a torsion spring between the nut and the bolt shaft to keep a very light load on the brake so that it will be ready to be applied as soon as needed. Oh and of course you'd probably want a pin thru the bolt shank so that the nut can only ever loosen a little bit and never fall off I'm sure there are other methods, but this is one that I've seen on one of those those manual cable winches. I'm sure manual elevators and dumbwaiters are probably very similar.airbornelabs.com/images/editor/files/9170-manual.pdf Of course even the one I saw was a bit more refined with multiple brake and friction plates and proper bearings and all, but a common nut and bolt can give you a good visual. The only other self locking mechanism I can think of right now is a worm drive, but they are a lot less efficient and would certainly be waste of one's energy. Edit: I just re-read your post. The ratchet and pawl comment brought back some memories. I think the whole brake mechanism spun when you raised the load. The friction plate that I mentioned was the part that the pawl actually engaged with. The torsion spring that I mentioned kept the brake engaged tighter than I initially thought, but since the whole brake spun against the one-way ratchet mechanism as you raised the load it didn't add any additional drag. Edit2: OK now it's almost all come back. When you raised the load, the handle turned the 'nut' clockwise until the brake tightened up enough to start turning the 'bolt' and the whole brake mechanism again the one-way ratchet mechanism. Maybe there wasn't a torsion spring at all. Sorry, I guess I shouldn't be so quick to post. On the other hand, I think I would have given up if I had tried to explain the whole thing all at once. Thinking about a system with a fixed brake, as I first described, is a lot easier than trying the grasp the whole concept with the rotating brake and all.Everyone I have talked to (and I have talked to people who repair locomotives and heavy machinery) can't seem to figure it out. Just watch this video How it Works: Chain Hoist - YouTube they show that there is a ratchet and pawl but then say that a clutch some how magically bypasses this in the down direction. A 'ratchet disc' which is allowed to turn in only the 'lift' direction by a spring-loaded 'pawl', opposes the brake disc area of the hub. When the hand chain wheel is turned to 'lift', the ratchet allows the ratchet disc to run, but when the chainwheel stops, with a load, the slight counter-rotation of the load chain sheave, which is keyed to the reduction gear cage, will turn, through the gearing, the pinion shaft on which the hand chain wheel and its hub runs. The principle is that the slight counter-rotation causes the chainwheel, on its fast thread, to press the ratchet wheel, one side of which bears against the brake disc, against the brake disc, which is keyed to the pinion shaft. As the ratchet wheel is stopped from rotating by the pawl, the weight of the load acts to press the disc firmly against the hub, preventing the pinion shaft from rotating. This accounts for the 'ratchet' sound when a load is lifted, and also for the slight lowering of the load as the brake is set. For the generality of hand hoist usage, this slight lowering as the brake is set is not a problem. This is one of those items which is ever so obvious when seen, but takes a bit of effort to visualise from a written description.it is a very simple device, to be sure, but there are quite a few parts in a spur geared block. The 'spur geared' refers to the reduction gearing between the pinion shaft operated by the hand chain wheel, and the load sheave, which has cast-in 'chain pockets' to control the load chain, which positively prevent the load chin from slipping on its sheave. The ratio of the gearing provides 'mechanical advantage', so that a load up to three or five tons weight can be lifted by one worker pulling on the hand chain, with a chain fall rated for that weight. Obviously, the gearing must be of a greater reduction as the rated weight of the block increases. Riggers and millwrights often prefer to use a 'worm gear block', often called a 'riggers' block', as, with a worm gear controlling the lift, the load can be very precisely positioned. This can be quite important when assembling machinery. The riggers' block, whilst more precise in operation, is much slower to lift, requiring many more feet of hand chain to be pulled for the same height of lift, compared to a spur gear block. Added on edit.we have a few of those blocks in our little shop here, of 1920's to '50's vintage. I would not permit one to be used until it had been completely disassembled, cleaned, and inspected, particularly for any sign of over-loading, with especial care for the load sheave, ratchet, pawl, and brake disc, and the load chain tumbled and closely inspected. Old ones are often found with the mechanism 'gummed up' from many years of use without maintenence, and the brake discs 'glazed', an unsafe condition. Once correctly 'reconditioned', a 1940's Yale, or equivalent, chain fall is a far superior unit compared to the low-grade oriental copies commonly on offer at the supply houses these days. And a bit more edit.I had a look at that youtube video. That oriental copy of a chain fall, once its mechanism is seen, is a 'joke' compared to one made by Yale or Wright, in the 1950's and earlier. Presumably, the manufacturer, located on another continent, is effectively immune from the liability involved in the eventual failure of such a poorly-built device. The reference to a 'clutch' is simply the loosening of the brake disc as the hand chain wheel is turned to 'lower', and in so turning, its slight longitudinal travel on the fast thread of the 'hub' tends to release the brake disc 'just enough' to allow the load to be lowered.This would take some getting used to.There is an OLD flour mill in Coffeyville Kansas- Bartlett Milling co. Still in business. Ships flour by rail and by truck. Gets wheat in by rail. They have one of these.Thanks Gbent for enlightening me on what they were called.They are the perfect solution to the problem if OSHA is not in the loop. Much less room than stairs, faster, no effort. I've never ridden one to the top so I have no idea what sort of mechanism is there for the person to afraid to step off or unaware they have reached the top. I haven't been in the type of plant that would have one of these elevators for over a decade so I have no idea if they are still in use, or still legal.Here is the one at the American Precision Museum. I didn?t spend much time studying it my self and they don?t cover Sedgwick but here is the link incase you find something of interest. A textbook on steam engineering. Regards, JimPractical Machinist is the easiest way to learn new techniques, get answers quickly and discuss common challenges with your peers. Register for the world?s largest manufacturing technology forum for free today to stay in the know. Learn more about us. All rights reserved. Register today. To learn more, please refer to the cookie policy. We'll bring you the most relevant peer-to-peer conversations happening in the trade and tips and tricks to help you get the job done. You may unsubscribe at any time. A dumbwaiter is basically a small service lift which is enclosed in a shaft and dropped by ropes or chains on a pulley to be raised or lowered by a hand rope guided by rails. It is used for bringing groceries, moving laundry, dirty dishes, and hauling suitcases between floors of a house, multi-story building, cafe, and restaurant. In the 21st century, this service lift is still in use in most modern restaurants, bars, clubs, and pubs and has ever since become an essential tool catering to different purpose and functions on more than one floor. Today, dumbwaiters are fabricated with cutting-edge technology and modern finishes which becomes an interior design feature altogether. Some manufacturers nowadays, offer customized unlimited number of stops depending on the need and requirement. Dumbwaiter elevators are also used in stores for hauling up goods from the warehouse and in breweries for transferring kegs from the cellar. They often bring food from a lower level to a kitchen pantry or can be used to bring food from a kitchen to a dining room on another floor. There is a locking mechanism or brake in the front bearing of the main shaft which locks the lift when not in use. The brake lever is attached to a check rope which allows the speed of the service lift to be regulated when the break is released. Manual dumbwaiter’s door needs to be manually locked. It is best to use half of the tray’s width and adding around two inches for clearance. Make sure that the pulley arm should be high enough to be able to pull the tray toward you. Remember that the shaft only houses the dumbwaiter and by itself is not structural. At the top of the frame on the rear right, you need to attach two fixed pulleys into a joist or a load-bearing member. Run the cord again up to the top going through the second upper pulley to the right and let the remaining cord drop to the bottom and tie it to a metal cleat for support. Dumbwaiter kits comes with a set sizes and lifting distances. The installation of dumbwaiter kit is easier to set up into an existing structure; and usually installs in one day. Hauling furniture in or out of your home will be a breeze. An outdoor dumbwaiter will surely save you the space, time, energy and even save you unsafe stair climbing. It can also enhance the design and add value to your home. Thank you! You will have to inquire about their latest prices. Thank you for the question. If it is possible, please contact me that I may get more information. Thank you. For a better experience, we recommend using another browser. Learn more Facebook Email or phone Password Forgotten account. Sign Up See more of Giggly Mind on Facebook Log In or Create New Account See more of Giggly Mind on Facebook Log In Forgotten account.If so, please try restarting your browser.Some of the materials needed to make this elevator are a cardboard, bobbin and Popsicle sticks. ElevatorsElevators that can zoom upBut in their time ordinary office elevators probably seemed almost as radical. It wasn't justOtis of Yonkers, New York. Otis literally changed the face of theThat's why his invention can rightly beAll the way to space. NASA is already workingIllustration by artist Pat Rawling courtesy of NASA Marshall Space Flight Center (NASA-MSFC). This diagram comes from a historic Otis brochureFrom the viewpoint of someoneIntelligent systems are programmedIf you wait for the cars to move out of the way, you can often see some of the workings and figure out which bits do what. To get from the ground to the 18thThe energy you expendThis is an example of the law of conservation of energy in action. You really do have more potential energy at the top of a building than at the bottom, even if it doesn't feel any different.Unfortunately, it's notIf the worst does happen, you'll find there's often an emergency intercom telephone you can use inside an elevator car to call for assistance. If it does the lift in 10 seconds, it has toSo the real energy consumption wouldBut much of itWhen the car moves down the shaft, the counterweight moves up—and vice versa. Each car has its own counterweight so the cars can operate independently of one another. On this picture, you can also see the doors on each floor that open and close only when the elevator car is aligned with them. The elevator carWhen the elevator goesAssuming the car and its contents weigh more than the counterweight, allThe counterweight makes it much easier to control theRest assured, there's nothing toThis was the greatEach car ran between twoThanks to the wonders of the Internet, it's really easy to look at original patent documents and find out exactly what inventors were thinking. Here, courtesy of the US Patent and Trademark. I've colored it in a little bit so it's easier to understand.