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Forum topic by BubingaBill posted 10-15-2013 11:40 PM 1303 views 0 times favorited 22 replies Add to Favorites Watch
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BubingaBill

290 posts in 1145 days


10-15-2013 11:40 PM

Hi All,
I have been box making about 2 years now and having some success with making pool cue cases. I have more designs in my head then I will ever have time to build! I have had many questions about tools, joints, and finishes. And have found most of my answers here so I decided to join your group!

I have a design for a 10 sided cue case (aka a tube) and I’m tossing around the idea of scrapping the hinged lid and going with an end that you can open. That’s where the fun begins!! I can’t do the “cut a dry” hinge and latch from the hardware store. I always have to think outside the box! pun intended.

I have an idea for a knob in the center of the “cap” that you would turn to unlatch tabs to gain access. But I can’t stop there!!

I want to have leavers that push and pull when you rotate the knob to either extend or retract 5 tabs around this shape. I would precut a slot in the 10 pieces that make up the body of the case for the tabs to slide into.

But I can’t stop there!! I want this to be exposed so when you turn the knob you see all these part moving. This would not be a case you could lock but all the cases I have made so far are as much art as functional.

I have been looking all over the web to see if I could find something like this and have only had limites success. Am I asking for failure in trying this??

-- Measure twice and try not to cut your thumbs off!


22 replies so far

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Grandpa

3256 posts in 2136 days


#1 posted 10-16-2013 01:25 AM

Nothing like over design. Wow! this thing is going to have more moving parts than a Mayflower van. I can be done I suppose but nothing would be simple. All I can say is good luck and I sincerely mean this. I was a designer for 30 years and my experience is generally the fewer moving parts the longer the life of my product.

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hobby1

327 posts in 1758 days


#2 posted 10-16-2013 01:45 AM

Are you making the mechanical parts all out of wood, or are you going with metal fabricated parts, for better stability in parts working together under all temperature conditions.

The reason asked is making mechanical wooden parts to that degree of complexity, will take some serious thinking to use the right material, that is thin enough to be asthetically pleasing, but yet durable enough to not expand and contract where there is binding.

So yes if you have the proper materials and design concept, then surely its doable.
I get a lot of ideas when I make a mechanical device, by looking at other products that have similar working functions, like in your case, I would even investigate the workings of an umbrella, just to get the feel of what is possible, or a drill chuck, or the principle workings of an expansion bolt,, you get the idea,,,,
Think in terms of an expansion bolt, how when the bolt is screwed in the leaves spread out,,
(just the principle behind it working, not the actual parts used)
however at a greater degree of freedom with the locking fingers represented by the leaves,,,ect…
You already got me thinking….
Any way,,

but at this stage you will probably go through quite a few trial and errors, but every try, you fail at brings you closer to that final design that does work.

I hope you didn’t mind some design ideas, you said you were looking on the innernet for this, if you already have a design in mind, please disregard my ideas input, I’m not sure in your original post if you were open for ideas or not.

Thanks
Have fun with it.

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BubingaBill

290 posts in 1145 days


#3 posted 10-16-2013 02:13 AM

Yes I was planning to make everything out of wood. The nice thing about this is the limited use it will receive. Maybe twice in one day and maybe one a week. I will post a pic of my first concept drawing tomorrow.

-- Measure twice and try not to cut your thumbs off!

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hobby1

327 posts in 1758 days


#4 posted 10-16-2013 02:26 AM

Looking forward to seeing your design concept, it’s nice to see unique mechanical ideas for woodworking projects.

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BubingaBill

290 posts in 1145 days


#5 posted 10-16-2013 02:36 PM

Ok gang, here is a sketch of my idea for the mechanical tabs to latch the end of my 10 sided case. If you look closely you might see the drawing on the back side of the page. It’s the machanical drawing of the 10 pieces showing the angles and thickness needed (not to scale) to make the 10 sides.

I also wanted to show you my very first case made of solid walnut.

-- Measure twice and try not to cut your thumbs off!

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BubingaBill

290 posts in 1145 days


#6 posted 10-16-2013 08:07 PM

Iā€™m planning on building a test out of Popsicle sticks to see what needs to be modified or changed.
Heck I still need to build the case that this will go into!

-- Measure twice and try not to cut your thumbs off!

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woodenwarrior

203 posts in 1655 days


#7 posted 10-16-2013 10:54 PM

I find your ideas very interesting! I’m excited to see the prototype you come up with. My only concern would be the size of the case upon completion. As Hobby1 said, making the mechanical parts small enough to be esthetically pleasing yet large enough to maintain their integrity is going to be the real balancing act. I will be following your progress. Good luck!!

-- Do or do not...there is no try - Master Yoda

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BubingaBill

290 posts in 1145 days


#8 posted 10-16-2013 11:17 PM

Im having second thoughts about the moving parts made of wood. So Im thinking brass. Making this more of a steempunk case! Any comments?

-- Measure twice and try not to cut your thumbs off!

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woodenwarrior

203 posts in 1655 days


#9 posted 10-17-2013 12:02 AM

I thought about your quandary during my drive home from work—that’s what I do to while away the 45 minute commute…design woodworking projects in my head—- Anyhoo, I was thinking, instead of a mechanical locking mechanism, how about using magnets…I know, weird, but hear me out. If you were to use one or possibly two magswitches on either end of the tube, redesigned to remove the plastic turn-knobs and installed with wooden ones and a metal plate covering the ends of the tube you could feasibly hinge the tube so that it opens length wise yet have an incredibly strong locking mechanism that stays as hidden as you make it. If this doesn’t make sense, I can draw you a diagram of my idea…I know sometimes my ideas make more sense in my head than they do in written word.

-- Do or do not...there is no try - Master Yoda

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Jorge G.

1537 posts in 1935 days


#10 posted 10-17-2013 12:10 AM

Why not make it like a screw top? All you need are threads on both the cap and the “cylinder”, add a straight handle and voila.
Your design will certainly work, I have seen it in other applications. On the other hand you could do something like a door for a gun safe, you only need 2 rods and a concentric cap that will push and pull the rods.

-- To surrender a dream leaves life as it is ā€” and not as it could be.

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BubingaBill

290 posts in 1145 days


#11 posted 10-17-2013 02:48 AM

Warrior.
Yes please show me what you mean.
Thanks!

-- Measure twice and try not to cut your thumbs off!

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BubingaBill

290 posts in 1145 days


#12 posted 10-17-2013 02:50 AM

Jorge.
I thought about a screw top but was worried about expansion making the top un removable.

-- Measure twice and try not to cut your thumbs off!

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BubingaBill

290 posts in 1145 days


#13 posted 10-17-2013 02:53 AM

I have been looking at safe mechanics to help my design.

-- Measure twice and try not to cut your thumbs off!

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Jorge G.

1537 posts in 1935 days


#14 posted 10-17-2013 09:22 PM

Here is what I am talking about….easily done and safe enough for a cue box

-- To surrender a dream leaves life as it is ā€” and not as it could be.

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BubingaBill

290 posts in 1145 days


#15 posted 10-17-2013 09:49 PM

Hi Jorge,
That’s along the lines of what I drew up just less peices to break! I’m waiting to see what woodenwarrior has in mind. I’m trying to not hinge this case but I will make another that will open like a standard box case. I’m going to head to the garage after work and start messing with my prototyping!

-- Measure twice and try not to cut your thumbs off!

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