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SOFT "OPEN" DRAWER SLIDES

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Forum topic by dorald posted 07-10-2019 01:48 PM 292 views 0 times favorited 19 replies Add to Favorites Watch
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dorald

81 posts in 2210 days


07-10-2019 01:48 PM

Topic tags/keywords: soft open drawer slides

I am building a sofa table for a neighbor and incorporated a drop-down shelf w/ slide out drawer so he can conceal “Home defense items”.

The drop-down shelf is hinged to the back apron. To access the Home Defense items, you slightly push up on the shelf until a latch is released and this shelf swings down to about a 45 degree angle. This shelf is lowered slowly with the aid of two dampeners and then the drawer slides down the shelf on two typical drawer slides. My challenge is to have this drawer slide down at a reasonable rate so it doesn’t destroy itself or break loose. By adding two or three Defense Items to the drawer considerably increases the weight. Have any of you ever heard of, know about, or used something to slow down a drawers opening like this???

Any help, comments, referals would be greatly appreciated as I have been working on this “challenge” for a few weeks now and my neighbor is growing impatient and wants his table.

-- No one can make you feel inferior unless you give them permission. . .


19 replies so far

View pottz's profile

pottz

5547 posts in 1402 days


#1 posted 07-10-2019 02:07 PM

sorry but ive never heard of a “soft” open drawer slide.you may have to invent something.

-- sawdust the bigger the pile the bigger my smile-larry,so cal.

View GR8HUNTER's profile

GR8HUNTER

6206 posts in 1130 days


#2 posted 07-10-2019 02:23 PM

although this is the newest product from king i am quite sure you can not adjust the speed of these slides :<(((((((((((

-- Tony---- Reinholds,Pa.------ REMEMBER TO ALWAYS HAVE FUN

View rbrjr1's profile

rbrjr1

208 posts in 623 days


#3 posted 07-10-2019 02:24 PM

When you want home defense items, you don’t want them slowly. I always prefer a fitted compartment that opens quickly.

Get him some foam inserts for that compartment and when properly trimmed, the foam should hold his items in place as the drawer drops.

-- only an idiot dismisses an intelligent statement because they dont know anything about the person delivering it.

View Bill_Steele's profile

Bill_Steele

524 posts in 2149 days


#4 posted 07-10-2019 02:46 PM

Perhaps you can rig something up with a spring or springs or bungee cord? If you have several “home defense” items in the drawer then you add more springs or a stiffer spring to accommodate the weight.

Think about a garage door spring and how it stretches when the door is closed. The energy stored in the spring(s) helps reduce the energy required to raise the door and control it’s descent when lowering it. Your secret “home defense” compartment when closed would have springs that are fully compressed. When the drawer is being opened the springs are being stretched and this may help limit/reduce the rate at which the drawer opens.

You would have to develop some sort of proof of concept and experiment with spring rates/sizes to find the right damping.

I searched and found something called an air dashpot—very interesting. This may also help you. Here’s a video to help understand > https://www.youtube.com/watch?v=HNzanZXvmo8

More info…
https://www.motioncontroltips.com/whats-the-difference-between-dashpot-and-snubber/

Just an idea.

View DS's profile

DS

3192 posts in 2838 days


#5 posted 07-10-2019 03:12 PM

Grass has a fluid cylinder for soft close that could probably be modified to do what you want.
The plunger is not attached to the box member so it opens freely. A few seconds after opening the cylinder fully extends (slowly) to be ready for a soft close.

If you figured out how to attach the plunger to the box member, perhaps it would slow open as you want.

my 2 cents

-- "Hard work is not defined by the difficulty of the task as much as a person's desire to perform it.", DS251

View SMP's profile

SMP

1176 posts in 323 days


#6 posted 07-10-2019 03:26 PM

So trying to build like a tactical walls style table? I would just get whatever drawer slides, and then get dampers with a matching stroke(or adjustable to within that range)

View dorald's profile

dorald

81 posts in 2210 days


#7 posted 07-10-2019 05:37 PM

OK everyone. I really appreciate all your responses, and the timely manner in which y’all responded. Thank you.

POTTZ: I am trying to invent something but it ain’t easy. . .

GR8HUNTER: I’ll check the referral out. Thanks!

gbrjr1: While I agree with your wanting to get at your items in a hurry, I think there is a fine line between drop down fast and drop down and destroy. I think I’ve attached a video of how fast it drops with the drawer empty, the entire table rocks, I can’t imagine how much faster it might be with a few hand held items in the drawer. . . .Foam or not. I am more concerned about the drawer holding together during this drop down than anything.

Bill_Steele: Thanks for your input. Great though process. I’ll certainly use it. Also appreciate the referrals. I will be checking them out this afternoon.

DS: I Google’d GRASS and GRASS HYDRAULIC CYLINDERS and didn’t get anything that pertained to what I am looking for. Can you please elaborate further?

SMP: I did use dampening cylinders on the shelf that initially drops down and they work fine. Only problem using them on the drawer that slides out is the throw. I can’t seem to locate ones that have that amount of stroke and are small enough in diameter. . . I know, I designed the horse BEFORE designing the barn ! ! ! Just my nature I guess.

As I said earlier Guys! Thanks again for all your responses and if you should have a late night brain rush, please contact me. . I can use all the help I can get! ! ! !

HOPEFULLY, if I’ve done this right, you’ll find my quick video of the shel/drawer in action! ! !

“https://youtu.be/5DR8j46Uvcs”
Thanks agin guys!

Dorald

-- No one can make you feel inferior unless you give them permission. . .

View rbrjr1's profile

rbrjr1

208 posts in 623 days


#8 posted 07-10-2019 06:02 PM

after watching the video, there’s nothing that is going to slow that down.. it’s too much moving mass anchored by too little static mass. (I bet those soft open slides weigh as much as the legs of the table)

beautiful table though..

-- only an idiot dismisses an intelligent statement because they dont know anything about the person delivering it.

View GR8HUNTER's profile

GR8HUNTER

6206 posts in 1130 days


#9 posted 07-10-2019 09:19 PM

after watching the video i am so sorry i cannot help you :<(((((((((((

-- Tony---- Reinholds,Pa.------ REMEMBER TO ALWAYS HAVE FUN

View sras's profile

sras

5108 posts in 3547 days


#10 posted 07-10-2019 09:30 PM

Check this out. You might have to do some work to find the right one, but the concept should meet your needs.

-- Steve - Impatience is Expensive

View SMP's profile

SMP

1176 posts in 323 days


#11 posted 07-10-2019 09:42 PM



Check this out. You might have to do some work to find the right one, but the concept should meet your needs.

- sras

I was just thinking of something like this on the drive home. If you’ve ever taken apart electronics like CD players, tape players etc, they usually heavy spring eject and aome type of rotary damper to soften the opening/eject. Sometimes like this link, sometimes more like a fine threaded rod that free spins on both sides,

Other option is a linear damper mounted at an angle so you frr the travel x compression effect of a shock absorber.

View LeeRoyMan's profile

LeeRoyMan

160 posts in 144 days


#12 posted 07-10-2019 09:49 PM

I think the lid drops to low. If you could shorten it some it wouldn’t sling shot the tray so hard.
You could also try to pinch the guides closer at the front so that it gets stiffer as it opens.
(that doesn’t cost anything to try.)

View dorald's profile

dorald

81 posts in 2210 days


#13 posted 07-10-2019 10:22 PM

LeeRoyMan – You might be right by reducing the distance the lid drops! It really doesn’t have to drop that far. I’ll try to reduce the travel distance and see of that helps.

I am blown away by all your responses guys! Thank you all so much. . . .

SMP & skas: I think you’re on to something here. I’ll try LeeRoyMan’s suggestion first and see where that leaves me.

GR8HUNTER: Thanks for trying! I really appreciate you trying.

rbrjr1: Thanks for the compliment on the table. I was given this Walnut from the neighbor’s fathers inventory to build this. His father recently past away and he wanted something built from this 30+ year old Walnut. Sort of a memorial table. Hopefully LeeRoyMan’s suggestion will give me a different set of parameters to deal with.

. . . More to come.

Thanks again guys!!!

-- No one can make you feel inferior unless you give them permission. . .

View therealSteveN's profile

therealSteveN

3077 posts in 992 days


#14 posted 07-10-2019 10:54 PM



When you want home defense items, you don t want them slowly. I always prefer a fitted compartment that opens quickly.

- rbrjr1

Yep. I call that a holster. :-)

-- Think safe, be safe

View therealSteveN's profile

therealSteveN

3077 posts in 992 days


#15 posted 07-10-2019 10:58 PM


When you want home defense items, you don t want them slowly. I always prefer a fitted compartment that opens quickly.

- rbrjr1

Yep. I call that a holster. :-)

Though it’s a regularly occurring phenom. A lot of folks won’t have a loaded gnu in the house. I can see that exchange now. Will you quit stabbing me, I have to load my gnu
- therealSteveN


-- Think safe, be safe

showing 1 through 15 of 19 replies

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