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#2110561 - 06/30/13 11:13 AM How to secure hinge pins
concertina Offline
Full Member

Registered: 07/11/11
Posts: 43
Loc: Canada
Hello all,

We recently bought a grand piano for ourselves and our kids. Our youngest is only two, which explains why we spent part of the day yesterday digging modelling clay out of the keyhole and replacing the hinge pins she pulled out of the lid.

The modelling clay is annoying, but now that she knows the hinge pins come out I'm afraid she'll keep pulling them out when I'm not looking. It's a fast way to cause damage to people and property to attempt to open a grand piano lid that is no longer attached at the hinges.

So - does anybody know of a way to secure the pins into the hinges without causing any damage to the piano, and leaving it functioning? I do like to open the lid sometimes, although I guess I could give it up until our kids are a little older.

Thanks.

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#2110578 - 06/30/13 12:00 PM Re: How to secure hinge pins [Re: concertina]
terminaldegree Offline
2000 Post Club Member

Registered: 05/03/06
Posts: 2623
Loc: western Wisconsin
Bend 'em a little so there's more friction, making removal more difficult.
_________________________
Pianist, teacher, internet addict.
Piano Review Editor - Acoustic and Digital Piano Buyer
Casio px-200, Bechstein A190 #192939 @ home
Steinway A #585209, B #416809 @ work
Schimmel 130T #339100, on loan

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#2110582 - 06/30/13 12:06 PM Re: How to secure hinge pins [Re: concertina]
Carbonblob Offline
Full Member

Registered: 04/26/13
Posts: 258
Loc: Los Angeles, Ca.
As I read this I flashed on a story a tech told me just a few weeks ago. another tuner friend of his was working on a piano some 16 stories up over Wilshire blvd (a very busy main street) while at their condo in Westwood. The tech opened the lid up and it slid right through the plate glass window and "sailed" down into the traffic below! To this day, both techs check the pins before opening the tops.....lol. Btw, nobody was hurt or even cut but it did stop traffic.

I was going to suggest a cotter pin type set up but small hands could still work the pin out (if they're determined). I can only think of locking the lid shut. Maybe there's a pin that is just long enough so it sits inside the hinge and would require a punch to remove. I would think that's risky though cause it could work itself out too. I would repost this in the tech forum. those guys (and ladies, sorry sam!) know way more than I could possibly think of........blob
_________________________
KAWAI RX-3 BLAK
YAMAHA GRANTOUCH GT1

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#2110585 - 06/30/13 12:10 PM Re: How to secure hinge pins [Re: concertina]
Minnesota Marty Offline

Platinum Supporter until October 5 2014


Registered: 05/15/12
Posts: 7211
Loc: Rochester MN
Hi Concertina,

Many times at PW there are lots of repetitive questions, but I gotta admit, this is a new one. Usually the loose pin hinges are fairly snug and a toddler wouldn't have the strength to pull them out. My only suggestion would be to contact a cabinet maker or furniture repair shop and see if they can find slightly larger diameter pins. They probably vary by manufacturer or even how they are plated. Other than that, you could probably find replacement tight pin hinges to use until the kids grow up.

About the clay, good luck! Remember to take all of the other child safety measures.
_________________________
Marty in Minnesota

It's much easier to bash a Steinway than it is to play one.

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#2110586 - 06/30/13 12:13 PM Re: How to secure hinge pins [Re: concertina]
Minnesota Marty Offline

Platinum Supporter until October 5 2014


Registered: 05/15/12
Posts: 7211
Loc: Rochester MN
I was typing as others were responding. Terminaldegree's answer borders on genius!
_________________________
Marty in Minnesota

It's much easier to bash a Steinway than it is to play one.

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#2110588 - 06/30/13 12:19 PM Re: How to secure hinge pins [Re: concertina]
Dave B Online   content
1000 Post Club Member

Registered: 08/01/11
Posts: 1890
Loc: Philadelphia area
If loading them up with 120volts of electricity and threats of a horrible and painful death don't work, just cut the L off the hinge pin. Keep a spare pin or something around so you can tap the pin out when you want to take the lid off.

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#2110608 - 06/30/13 01:07 PM Re: How to secure hinge pins [Re: Minnesota Marty]
terminaldegree Offline
2000 Post Club Member

Registered: 05/03/06
Posts: 2623
Loc: western Wisconsin
Originally Posted By: Minnesota Marty
Terminaldegree's answer borders on genius!


This would make a lovely forum signature... grin
_________________________
Pianist, teacher, internet addict.
Piano Review Editor - Acoustic and Digital Piano Buyer
Casio px-200, Bechstein A190 #192939 @ home
Steinway A #585209, B #416809 @ work
Schimmel 130T #339100, on loan

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#2110789 - 06/30/13 06:52 PM Re: How to secure hinge pins [Re: concertina]
Bob Offline
3000 Post Club Member

Registered: 06/01/01
Posts: 3833
Checking lid pins on both grands and verticals is tuning 101. Even when the lid is already in the up position when you first arrive, check for pins. Mute handles make good temporary pins if needed.
_________________________
www.PianoTunerOrlando.com






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#2110918 - 07/01/13 12:17 AM Re: How to secure hinge pins [Re: Bob]
Jean Claude Offline
Full Member

Registered: 09/18/11
Posts: 354
Loc: France
I saw a school piano once on which the hinge pins had been replaced by split pins. It didn't look very elegant but they are extremely difficult to remove unless you have pliers to straighten them.

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#2110977 - 07/01/13 04:00 AM Re: How to secure hinge pins [Re: Jean Claude]
Jean Claude Offline
Full Member

Registered: 09/18/11
Posts: 354
Loc: France


I also think that you should avoid any solution which requires you to 'drift' the pins (ie whack them with a punch and a hammer) in order to remove them as you risk gouging a chunk out of the case if (when) you miss.

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#2111027 - 07/01/13 07:47 AM Re: How to secure hinge pins [Re: concertina]
Ed Foote Offline
1000 Post Club Member

Registered: 05/03/03
Posts: 1091
Loc: Tennessee
Greetings,
What techs learn, usually the hard way, is to always check the lid pins before we lift. I think everyone should.

Inre your pin and toddler combo, I would replace them with nails. ( pins, not toddlers). Get a size that is a snug fit, give it just enough of a bend so that it requires a tool to remove, and tap it in with a piece of wood. The point should protrude to deter the determined digits of your child. Save the pins for when he outgrows the urge. (and don't try to save them in the bench...).

REgards,


Edited by Ed Foote (07/01/13 07:48 AM)

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#2111078 - 07/01/13 09:44 AM Re: How to secure hinge pins [Re: concertina]
Minnesota Marty Offline

Platinum Supporter until October 5 2014


Registered: 05/15/12
Posts: 7211
Loc: Rochester MN
Jean Paul's solution is a good idea. For the North American contingent, I think the common name for what he is suggesting is a 'cotter pin.' They are readily available in many diameters and lengths.
_________________________
Marty in Minnesota

It's much easier to bash a Steinway than it is to play one.

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#2111088 - 07/01/13 10:08 AM Re: How to secure hinge pins [Re: Minnesota Marty]
Jean Claude Offline
Full Member

Registered: 09/18/11
Posts: 354
Loc: France
Originally Posted By: Minnesota Marty
Jean Paul's solution is a good idea. For the North American contingent, I think the common name for what he is suggesting is a 'cotter pin.' They are readily available in many diameters and lengths.


Who, pray, is Jean Paul?

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#2111094 - 07/01/13 10:17 AM Re: How to secure hinge pins [Re: concertina]
Minnesota Marty Offline

Platinum Supporter until October 5 2014


Registered: 05/15/12
Posts: 7211
Loc: Rochester MN
Oops! - So Sorry! - Brain Fart! - My Bad! - Pope?

blush

Bless me Papa for I have sinned.
_________________________
Marty in Minnesota

It's much easier to bash a Steinway than it is to play one.

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#2111097 - 07/01/13 10:24 AM Re: How to secure hinge pins [Re: Minnesota Marty]
Jean Claude Offline
Full Member

Registered: 09/18/11
Posts: 354
Loc: France


To err is human, to forgive divine.

Consider yourself forgiven, Malcolm.

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#2111099 - 07/01/13 10:27 AM Re: How to secure hinge pins [Re: concertina]
Minnesota Marty Offline

Platinum Supporter until October 5 2014


Registered: 05/15/12
Posts: 7211
Loc: Rochester MN
Thanks, Juan.
_________________________
Marty in Minnesota

It's much easier to bash a Steinway than it is to play one.

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