Opening a hatch when an object touches it

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1

Hello.

It's all in the title.

I'm still on the design of my freight elevator. To prevent someone from falling into the hole in the top slab, I put two boards in for the moment. I would like them to open when the cash register goes through. You get the picture? But what does it take as a connection then...? I've already done everything necessary to make the two boards work as a two-part hatch, but I'd like them to open when the box touches them... ok for you?

I'll add two screenshots to illustrate everything.

Thank you in advance.

Fred

2

you just have to put a roll bar (half a clergy) above your body 

When this hoop touches the hatches they will open

if you have correctly constrained the pivot hinges

@+ ;-)

2 Likes
3

the question is to simulate the movement in SW or in reality?
- in SW: I don't know
-actually:
+ First of all, I'll limit the hatch to the actual passage of the body, even if it means making a fixed hatch for the passage of the control chain (which will have to be carthered, at least near the sprockets).
+ Then you have either the GT22 solution or the option of an arm attached to the hatch that would be pushed by the chassis under the body.

Last thing, have you planned a brake system to prevent the weight of the body from dragging the system (and the operator's arms)?

3 Likes
4

Hello gt22.

I put pivotal links for the two ends of the hatch, but I can't add another link as you explain to me...

Could you explain this to me a little better?

I enclose my assembly as explained to me by our friend Steffeno.

Thank you both.

 

 


assemblage_ascensseur_a_courses.zip
5

to stefbeno.

Yes, I'm going to integrate all the necessary security, don't worry.

There will be a pedal to allow the steering wheels to be unlocked, and a counterweight to avoid over-pushing to increase the load.

Compared to the unloading height, I have to put it high enough so as not to hurt my back, and so my hatches have to stay open when I'm on top. I think I'm going to lengthen the crate down so that the hatches always stay in place.. something like that.

Thank you anyway for all your advice.

 

Fred 

6

Hello, around the problem, why not remove the hatch and put a safety barrier instead!? even if it means putting a gate!

Have a nice day

7

it's not wrong G.

I'm going to offer this to customers.

But let's get back to our concern for constraint so that this trapdoor opens when the cash box passes.... under SW.

In real life, we'll see later.

Thank you for your help on this issue.

a+
Fred

8

Personally in Solid I don't see... As much as in simulation it would be possible with the contacts, the volumes of the parts, but simply by constraints, personally I don't think it's possible other than to make configs.

Cdt

1 Like
9

Hi all

I tried with a limit distance (the total travel of the elevator high value and 0 in low value), between the upper edge of the body and the bottom of the hatch; on the way up it works, on the other hand, the hatch doesn't close on the way down...

10

yes not bad!!

I put 30000 in max height, but the body stops 451 mm after passing the slab. I don't understand why she stays frozen there.

At your place too, FLOP1?

 

11

the same with me!! ...

weird...

12

Hello

You should try with a cam.

The cam has the shape of a half moon as explained before.

It works great, I just did a test

Kind regards

13

Hello

 

Try with a CAM, it works very well.

I just did a test.

In Parisian bistros (and probably elsewhere) the freight elevators have two pointed arches (as for the Gothic) and this raises the trapdoors. The hatches once vertical prevents someone from falling into the hole.

Kind regards

 

2 Likes
14

deleted because duplicate

 

If a mod would like to delete this post

Thank you

15

@ zozo hi 

This is exactly my answer in the com thread

except that I didn't tell him to do a cam constraint but it seemed so obvious to me

which moreover is there exists on SW the schematic representation it's nice to simulate a functioning 

Another technique is the idea of the grasshopper there is a Google video in schematic representation

The chain rises and falls

therefore a line  of a certain length

hung on the part of the chain that goes up and the opening side hatch X2

then just hide the lines that open and close the hatches

@++

1 Like
16

It's done in a hurry but it's simple to do

Kind regards

 


trappe_bistro.gif
3 Likes
17

ah ok like that.... I had indeed not understood your advice.

I'm going to test this and tell you.

a+

Fred

18

well so I drew this cam and I manage to put this CAM constraint and ok the hatch opens when I go through, but I can't get the body to leave this hatch... in downhill mode, so I can't go down to the bottom...