h a l f b a k e r yViva los semi-panaderos!
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a "Y" instead of an "L": the first use that comes to mind would be for butterfly doors fastened to a post.
The middle flap (pick one at random) would be attached on the side or in the post and each of the other ones to a door. If you attach the plates to the outside of the door, the doors will not
only butt up to each other while closed, but a door can be opened fully until it rests flush against the other one.
hinge
http://www.alibaba....Butt_Hinge.jpg.html
[FlyingToaster, Oct 13 2009]
[link]
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So... this is not like those double hinges that let a door open fully
in both directions with an audible click as they pass the center
point? |
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the applications I had in mind were for one post + two doors = 3 plates on the hinge... the exact opposite of saloon-doors (which is two posts with one door each)... okay whatever they're called where you'd have a post with a door on each side of it, thus: |
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[|], whereas you mean |][| |
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sorta like those pickup-box toolboxes which sit on the rails with a lid on each side. |
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I think this requires a centerpost that is either very thin or
that the hinges extend well away from the centerpost to
allow the doors to swing. I could be wrong, I'm having
some trouble picturing it,
but the doors swing inwards around the post (the 0) to
midpoint
/0\
? |
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I can see how one side would work, but not the other. In fact, I can't envision this hinge allowing one panel to move much at all unless the center "post" is really thin (or unless one leg of the hinge is the post as well). |
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Does this solve some sort of problem? |
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I think I've seen these for cupboard doors. When closed, the whole thing is flat; center plate on the outside of the cabinet face, and the doors on the outside of the hinge plates:
_]___[_
with enough space between the door edges and the hinge point that when you open a door, it swings out and clears the edge of the other one; a beveled edge allowing closer clearance.
I'll go Google... |
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picture <link> but with a 3rd leaf. For demonstration purposes picture the 3rd leaf protruding backwards. Now nail that to the side of a 2x2 or sandwich it between two 1x2's, leaving some clearance for doors to fit under the other 2 leaves. Now (predictably) put doors under the other 2 leaves. |
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[lurch] same thing *except* for this one the ___ is a | , making the hinge a T : the | would be affixed to the side of the post, in a biscuit hole or sandwiched between 2 smaller posts. |
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[I made an error in the post: in order for open doors to lie completely flat against each other, the portions of the leaves would have to be separated: each O---- subhinge separate from the rest, ie: just a bunch of O---'s on a ===== so you could have any number of "leaves" by combining the subhinges, but 1,2 & 3 are the only useful amounts, I'd think.] |
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Better still just think of it as a hinge you can hang two doors on, one on each side, with a backplate to fix to a post. |
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//Does this solve some sort of problem?// |
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I get the description; what's missing is a reason why(?) What led you to this invention? |
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unless the doors attached to the hinge are waver thin, they will end up spread out. |
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And i, too would like to know the problem to this solution. |
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compound hinges of many (really any) sort are widely available. |
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//why//
I've a cabinet with a centrepost I want to put 2 doors on and don't see any reason why I should need separate (and staggered since I want the edges to butt up against each other) hinges for each door. |
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//compound hinge// I think "compound" refers to > 1 pin; this is one pin with a base flap and two door flaps (in the application I have), all on the same pin. |
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Can you affix a T piece to the centre post (recessed back by the thickness of the door) and pop-rivet a piano hinge to each side of the descender of the T, hinge outward, then affix your doors to the remaining leaves of the piano hinges, so they swing out and away from the descender? See ASCII diagram below, with centre | the descender. |
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You can only have one door open at a time, but you get the result you want, with widely available door furniture. |
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[UB] that's functionally the same: note that if you put have the flaps on the outside of the doors, you can fold them over on top of each other (more or less). |
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a post | ____|
from which 2 doors on a hinge prepend: -------o-------
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like so |____|
------------o-------------
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or imagine a hinge with a too-long pin that sticks out from either side. Now attach the parts that stick out to the post with eyebolts (or bend the ends of the pin 90deg and hammer them in). |
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I'd be disinclined to make a feature of the hinges by exposing the door side leaves, unless you intend to do it on all of the doors. |
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I hope my suggestion was useful, if you're trying to figure out a practical construction problem. I've had to solve a few problems with cabinetry and signage construction, over the years. |
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//door-side leaves// yeah pretty much: function > form (for my application, the idea is more generic). Seems (unless it's actually baked) the way to go is chop off the last subhinge on either side and fix the pin to the post that way, or make one from scratch with a nail and single "O--"s. |
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Good luck with that. Good hinges are reasonably precise machines. |
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You might be able to construct one but it won't work on a common pin, as the doors will be butted tight against each other and won't swing outward. |
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Nor will they swing inward if they're tight against a post, inside. The post will prevent them moving or will act as a fulcrum and lever the hinge screws out of the door/s. |
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The only way it might work is if the pin is to the outside, similar to my previous diagram. |
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If the flaps connected to the doors are mounted on a spring-loaded slide, you can have the doors butted up tight together when closed, and as they are opened they move outward along the slide (I'm sitting here looking at the "unbreakable hinges" on my glasses frame which works like this (well, the unbroken one, anyway)) |
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