Two Hand Trip Lever

I must be doing something wrong. This certainly is not the press you were alluding too.

Please change the search term to something more suitable.

What do you intend to trip with your lever?

As I stated in my request I want to trip an eccentric press.

Why?

Is "trip" the correct description of what you expect it does?

is it:

activate (a mechanism), especially by contact with a switch, catch, or other electrical device. "somebody tripped the alarm"

• (of part of an electric circuit) disconnect automatically as a safety measure. "the plugs will trip as soon as any change in current is detected"

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Poor sketch above, pure mechanical answer.

Consider the top vertical pin as the output, there are three horizontal pivotable levers, They minimally engage at their intersection ( see the space between levers representing the engagement. When either bottom pin is pushed up individually, it will not move the top pin up and loses it hold on the center bar. When both lower vertical pins are moved together they move the center upper pin vertically and engage the press in their transition to releasing the center bar at the top of the stroke. I assume the non repeat is guaranteed by the press.

Requirements

two hand operate

simultaneous two hand

non repeat until reset

Hope this helps,

I do need to add one point. You need to understand that a mechanically tripped press in destruction released once activated. That will not meet OSHA. Separate provisions, guarding, cables etc. must be provided to prevent the operator from reaching into the press after activation.

Thanks,

Here

Thanks anonymous that is where I started but with no success. CR4 was my last refuse.

See if you can get any if you do please let me know.

The reason the original equipment manufacturer is not available by telephone is what, please?

I do not know of such an original manufacturer.

I have googled and searched high and low and could not get a supplier for this nor a design.

Please give me some credit for intelligence I have tried everywhere else before I tried CR4 and if my memory serves me right there are some creative and intelligent members with this forum. For those who don't know the answer please do not be mad at me for being uninformed, you do not need to reply.

Thanks.

The forum doesn't have much to go on as yet.

"The forum doesn't have much to go on as yet."

Haven't you seen post #1

"Credit for intelligence"...? ! ? Sorry, but: Bah!

What kind of a "Question" have you posed here?

What TYPE of "eccentric press" are you referring to, for doing WHAT...?!! The link provided by AP1 yielded a sweet-looking pdf file from Ohio.edu, to which you haven't begun to respond, explaining the why-nots as to why IT does not satisfy your need.

If you can find your answer with such loose description, then please help ME:

I am looking for a button.

?? Did we not JUST "go through" the irritation of ambiguous postings here... e.g., (_my) "Post #21" at this thread.....?!?!?

That must be it!

Aah at least somebody that grasps the problem.

Thanks for your input, but I am looking for a design of a mechanical trip lever.

The purpose of the trip lever is to 'trip' the rolling key mechanism on an eccentric mechanical press.

For safety sake the operator must use both hands simultaneously to trip (start the cycle) the machine ensuring that his hands are out of danger. Normally these machines are supplied with a foot pedal trip mechanism only. In some countries like in some US states it is a legal requirement that presses should be equipped with a two hand trip mechanism. The proposed system you show does exactly that but is an electrical system. You can also have pneumatic and hydraulic systems but I need a mechanical system.

"Apologies", but, YOU are simply "aiding-and-abetting" the PROBLEM here...(!)

The OP is NOT looking for a "SUPPLIER"... he is "looking for a simple mechanical two hand trip lever DESIGN..."

Yet , he has NOT provided a single solitary morsel of information as to what precise function, his "design" is intending to perform.

[[ See ARrrrgghhhhh ! ! ! above ! ]]

That would be why the forum hasn't got much to go on, then.

Errrr.... "No comprendo"

"The biggest problem in communication is the illusion that it has taken place"

. . . . .

??? did you (really?) MEAN TO "Reply_To" #14, instead of to (my) Post#11 (replying-to YOUR Post#7...?!?!?

ARrrrgghhhhh ! ! !

The expression "Two Hand Trip Lever" is completely undefined. Until that is corrected, no progress is possible.

I stand to be corrected but I was under the impression that this is an ENGINEERING forum and an engineer that does not know what an eccentric press is nor what a trip lever is is still wanting plenty experience.

Most metal components are manufactured by pressing or forging.

Thanks for trying anyway.

So is that metalwork, and not printing, then, FFS?

u h . . . I'd mebbe give a "GA" for that ... IF you'd go that "extra millimeter" to zoom and crop just a tad.

Or perhaps , even just share the NUMBER, so as to enable success in locating the file!

Let's all try to go "ONE_BETTER" than some of the "Query-ers", here.... eh?

[[Zooming-in on the "almost-image" provided does NO good whatsoever...!]]

Johan do you want to activate your press with this 2 hand lever. The idea is to occupy both hands to ensure that the hands are both out of the way before the press opperate?

That's it, yes for safety.

Your biggest concern should be that these levers need to be interlocked. That means on lever pushed activates the machine and the other lever activates the first lever but it also has to deactivate the machine when released. Or both activate the other lever plus machine while a release of either one of the levers deactivates it.

You might want to search for mechanical interlocking safety levers.

Never seen a mechanical two hand trip, they are usually electrical. Are you sure that they exist?

Yes they do. I have had machines equipped with them.

Thanks for your trouble, but it seems I will just have to keep with my own design.

well you will have to keep with your own design because you are giving us nothing to go with.

your machine, does it operate on hydraulic pressure to form your metal? if so, your safety setup can use some hydraulic valves that can be open/closed with your safety levers or buttons.

the group is asking... begging you to give more detail such as pictures ect. so that we can help you. yes we know what an eccentric press is or does, the design can do many more things than what your chore is.

ask a detailed question- get a detailed answer.

Who is the press manufacturer and what model is it?

I assume you are engaging a clutch on the drive of the press eccentric that has an engaged position and a raised/stopped/locked position and what you need to install are two interrupter bars required to put the clutch into position to stroke. Will your application require control release between actuations to prevent the duct tape control override?

Related question, which local safety regulations are you complying with?

Where I am located, the regulations on this sort of installation will allow electrical interlocks, others types of installations require electromechanical interlocks and some allow mechanical only interlocks. On eccentric presses in my locale, mechanical or light curtain guarding is allowed on eccentric presses as well as two hand electric interlock.

All I know is that it is a German manufacture 45 Ton eccentric press.

The type of press nor the mechanism of control is really of importance, all I need is a trip mechanical mechanism. This only needs to provide some lever movement when both hands are applied to the handles. Below is my draft design I intend to use.

It has been over 25 years since I worked in a shop that had a room-full of punch presses, knocking-out circles of (several) stainless alloys from which to manufacture metal bellows devices.

Of those, I recall that SOME had "safety-bar-door" interlocks (to prevent hands getting in, during cycling), while others did not.

Due to most every other detail being a bit foggy, at this point, I cannot be of much help.

HOWEVER (Jp's consummate attempt to wring-things-out aside), I am floundering to make sense of (several things, including):

"All I know is that it is a German manufacture 45 Ton eccentric press.

(neither) The type of press nor the mechanism of control is really of importance"...

THUS - (as PW stated in #7)... "The forum (still) doesn't have much to go on as yet."

SE's link (in #9) reiterates that there are numerous ways to achieve SAFETY... which IS, obviously, the ultimate goal.

HOW on Earth can the make/model (of press) and the "mechanism of control" NOT MATTER (i.e., not be of importance), and yet, require you to jump through hoops designing a two-handed-mechanical-sort of operation-tripping?

I am willing to bet that there is (EITHER) an electric motor or a hydraulic system providing the impetus for the press, and as such, affords a wide variety of possible solutions, IF you were open to any-and-all considerations.

Without more detail being available, "mechanical design" (in my humble opinion) is futile... unless somebody here has ((67model's)) "CR4 crystal ball ... or... palantiring" abilities.

<< G r o a n ... >>

Thanks for your much valued input.

Yes the box has a cover to keep all the parts in at least. The two side bars also have elongated handles for leverage and a grip.

Just keep in mind on your proposal of the one lever releasing the other that it is paramount that both levers must be pushed simultaneously .

Duct taping will not work as the trip will only work once, then has to be released for the next cycle.

some type of electrical relay over mechanical control may be more cost effective as well as simple.

or give these guys a call.