DE202008016386U1 - connecting device - Google Patents

Abstract

Connecting device for connecting two construction profiles (1a, b), the undercut grooves (2a, b) on its outer side, approximately parallel to each other
a latching connection element (3), which comprises
- A base body (4) having two opposing abutment surfaces (4a, b) and two connecting surfaces (4c, d) connecting the abutment surfaces on each side, wherein the edges between abutment surfaces and connecting surfaces define a longitudinal direction (10).
- A clamping passage (6) which penetrates the base body (4) from one to the other bearing surface (4a, b) in the passage direction (11),
- A clamping screw (5), which is pushed through the clamping passage (6), with its widened head (5a) on a shoulder (6a) in the clamping passage (6) is supported and with its free end of a contact surface (4a) of the body (4) protrudes and is screwed into a sliding block (7),
marked by
- An on one of the connecting surfaces (4c, d) open towards Einhängedurchlass (16) with a receiving space (17) for the ...

Description

I. Field of application

The The invention relates to a connecting device for connecting two approximately parallel running construction profiles, which undercut as usual Grooves on its outer circumference have.

II. Technical background

In In the industry, construction profiles become longitudinal running, on the outsides arranged, undercut grooves often used to support structures, Racks or similar in a simple manner by making these design profiles via appropriate Corner connectors, angle connectors and the like, in the grooves use suitable sliding blocks for jamming, to stable support frames can be connected.

There are for this also fasteners, the two about parallel to each other scarce connect adjacent construction profiles, however, these fasteners are usually always designed to to permanently connect the construction profiles. While are the fasteners usually designed releasably, however, is the dissolution process time consuming, by having to loosen screws and the like.

It However, there are applications, where two approximately parallel to each other connecting profiles firmly connected by means of suitable connecting devices, however also very quickly separated from each other again.

This is the case, for example, with protective gratings, which are produced in the industry to distinguish between machines and work spaces for safety reasons:
Usually vertical posts are fixed to the ground at a regular distance of about 2 meters, and then grille panels, which cause the separation function, mounted between these posts.

there exist frequently the posts of the protective grid as well as the frames of the grid fields from the said construction profiles. Just when mounting or when commissioning a machine by means of such Guard must be disconnected, every now and then one the grid fields are removed again between two posts, to ensure access to the machine for a short time at this point. Therefore, must the grid fields can be removed again from the posts.

III. Presentation of the invention

a) Technical task

It is therefore the object according to the invention, to provide a connection device with which Help two approximately parallel construction profiles quickly fixed against each other and also quickly back from each other solved can be. In particular, should also be a temporary attachment against each other possible be.

b) solution the task

These The object is solved by the features of claims 1 and 20. advantageous embodiments emerge from the dependent claims.

The In claim 1 described latching connection element is by means of sliding block and clamping screw on the outside of a construction profile bolted, which has an undercut groove for receiving the Nutenstein owns.

A Suspension screw, by means of sliding block in the undercut groove on the outside of a bolted to other construction profiles and from this design profile by a defined length protrudes, can in the unilaterally open receiving space of the connecting element be hung and locked there due to a locking pin of this connecting element, the open side of the receiving space for the shaft of the suspension screw as far as closes, that the shaft without actively moving away the locking pin is not the receiving space can be moved out, what a separate opening device is formed on the connecting element.

On this way, the profile carrying the fastener on the other profile, which carries the Einhängeschraube, easy hooked be because the shaft of the suspension screw the Locking pin during of introduction in the receiving space can easily push aside, but vice versa when removing by means of the screw shank of the locking pin not can be moved to the open, non-locking position.

The main body of the connecting element, in which the receiving space is formed, is usually made of plastic or light metal die-cast and is preferably formed centrally symmetrical to its center plane, which forms the middle between the two contact surfaces, with which the main body to the two structural profiles to be joined is applied, and is centered therein by means of a centering projection on the Anla gefläche is formed and preferably extends in the longitudinal direction, and slightly protrudes into the groove.

The Passage direction for the receiving space and thus the longitudinal direction the suspension screw extends transverse to this median plane and the open side of the receiving space points to one of the two connecting the contact surfaces and in the same Direction of running side surfaces out. The open side of the receiving space is preferably the lower one Page.

The contact surfaces for the widened heads of Clamping screw on the one hand and Einhängeschraube other hand across from set back the contact surfaces, so that in this area the thickness of the main body a maximum of 50%, better only a maximum of 35% of the thickness measured in the direction of passage entire body is.

In the receiving space the Einhängeschraube passes over a Einhängedurchlass, which widens towards the open side a funnel-shaped inlet area, the one of two at an angle formed on tapered surfaces becomes.

At the transition the suspension passage in the receiving space the Einhängedurchlass defines a guide channel, the on one side, namely the Opposite reception room, is bounded by the locking pin, which preferably integrally with the main body is formed and at its transition to the main body is elastically pivotable.

Of the guide channel is only sufficiently wide for passing the shank of the suspension screw, when the locking pin from its normal position in an alternative space away from the guide channel is deflected into, which is when inserting the screw into the receiving space happens by the contact pressure of the screw itself.

Then points the relieved lock pin, however, with its free front face against the circumference of the suspension bolt in the receiving space, so that when pressure the screw against this face of the Although locking pin in its longitudinal direction but it does not swing aside, what kind of releasing of the guide channel would be necessary.

This can only be activated by pressing the opening device can be achieved, which consists of a Entriegelungsdurchlass in the body, the one on a gap directed between the locking pin and the opposite part of the body is.

There the cross section of the Entriegelungsdurchlasses is greater than the said gap can by introducing a suitable unlocking tool through the Entriegelungsdurchlass into the gap the gap be enlarged according to the cross section of the unlocking tool with the result that the latch pin is away from the side of the gap is pivoted in the opposite direction and thus in the alternative space into it, causing the guide channel for moving out the suspension screw is released from her recording room again.

In order to not any flat material such as a screwdriver can be used as an unlocking tool, has the Entriegelungsdurchlass one of a flat material, so about a rectangle, deviating Cross-sectional shape, for example, an arcuate cross-sectional shape, so that the unlocking device only with a correspondingly shaped Special tool operated can be.

On This way ensures that after snapping a suspension screw in the latching connection element this connection only with a special tool and reopened by an authorized person can.

There It may be necessary with the latching connector equipped profile first only temporarily and very easily removable on the other connection profile To hold, the connecting device comprises an additional part, which on body of the connecting element can be fastened and preferably fixed in a form-fitting manner can be by pushing in the direction of passage on the connecting element.

The Additional part has an approximately hook-shaped cross-sectional shape - considered in the passage direction - with a downwardly open Einhängebucht, the is bounded by a long and a short lateral leg.

Of the long leg is on the side surface of the main body of the Fastened fastener in which the funnel-shaped, to Reception area, Inlet area opens and Although so that this inlet area is closed by it.

Consequently there is the bay next to the main body of the connecting element and with this Einhängebucht, the connecting element provisionally over the shaft of the suspension screw hanged become.

These provisional connection is in no way secured and can by simply lifting the connection device with the additional part from the shaft of the suspension bolt solved again become.

As soon as the connection between the two connection profiles of duration should be, this attachment is removed from the connector and the shaft of the suspension screw introduced into the recording room and locked there.

The connection device may further comprise, in addition to the latching connection element, a non-latching connection element:
If two construction profiles are to be fixed against each other, at least two connection points are required for this purpose in the longitudinal direction at a distance.

there it is in many applications makes sense, only at one of the connection points a latching connection element to use, at the second or all other non-latching Connecting elements that release the connection overall between the connection profiles essential easier, because then not several latching fasteners solved at the same time Need to become, to solve the connection between the two construction profiles.

One Such non-latching connection element has on the one hand - like that latching connection element - again a clamping passage through which a clamping screw are passed through the body can to him by means of a sliding block in one of the grooves of the preferably screw the same construction profile as the latching construction connector.

Below the clamping passage is located in the main body a receiving space, again for the screw shaft a suspending from the other construction profile suspension screw, to one side of the body towards - preferably to lower face this body out - open is and a conically widening to the open end enema which is bounded by two flanks, which are between the conical Inlet and the receiving space parallel to each other.

The Length of this parallel flanks is at least as as big as in the latchable connection element, the distance from the receiving space at the narrowest point of the conical inlet measured in the same Direction in which the two flanks in the non-latching connection element run.

There in this body no locking pin is present, the receiving space after insertion of the Suspension screw closes in the reception room, can the suspension bolt at any time again from the recording room and thus the non-restraining Connecting element can be removed by simply lifting this Connecting element of the shaft of the suspension screw.

On this way is enough for the Solve the Connection between two by the connection device described connected construction profiles pressing the unlocking device one, latchable connection element to the latchable connection element from the local suspension screw to be able to remove and by further lifting also the non-latching connecting element, which is preferably the lower of the two connecting elements, from the local suspension screw withdraw.

For special Applications may still be in the non-latching connector a fuse are provided, preferably in the form of a threaded hole, arranged transversely to the passage direction under the receiving space in the base body is to screw in a locking screw, which is then the receiving space closes down.

One typical application for Such fasteners is the creation of large-scale protective grids, for example, for separating the working spaces of individual machines a production hall in the industry.

there the grids are made of floor or ceiling mounted spaced apart, mostly vertical post in shape of construction profiles, between which gridded fields fastened be, so a consistent Protective grid is created.

The Grid fields in turn have an outer circumferential Frame, of which at least the legs running parallel to the post also construction profiles of the type described input, ie with undercut groove on at least one of its outer sides, are inside that are filled with plates, grids or the like.

there There are usually two fasteners on top of each other on each side a grid array, of which the lower ones are non-latching Connecting elements and the upper latching fasteners are.

If the machine separated from such a protective grille, for example, is put into operation, an occasional access to the interior of the protective grid is usually necessary, so that the usually only arranged in the protective grid and secured door is not sufficient for this, especially since they are not usually sitting in such a place, which has an optimally short access to the moment in advance the reason standing position of the machine, especially when setting up the machine offers.

In this phase can one or more grid fields of the protective grid only provisionally hung with the help of the additional part to the post and very easily again solved become.

there is however for anyone can see at first glance that this is provisional hinged Grid is not permanently hung, since it is in the area of provisional suspension does not hang in the plane between the supporting posts, but rather laterally offset to this.

One accidental leaving with only provisional suspension is therefore excluded.

To permanent mounting of the grille panels, these can only with the help of Hanged off special tool become.

If the snap fasteners with the mouth side of the inlet area can be mounted inside, ie to the machine, can be there accidentally trapped person in distress and with increased expenditure of time even without special tool through the inlet area through the Move locking pin to the open position with a z. B. normal Screwdriver, but this is from the outside of the protective grid not possible then.

c) embodiments

embodiments according to the invention in the following example closer described. Show it:

1a : a protective grid in the locked state,

1b : a protective grid in the disengaged state,

1c : the latching connector 1b .

1d : the non-latching connector off 1b .

1e : the latching connecting element with additional part,

2a : the latching connection element in perspective view,

2 B in the assembled state from below,

3 : the latching connection element in individual views,

4 : the latching connecting element with additional part,

5a : the non-latching fastener in perspective view,

5b : the non-latching connector in single views, and

6 : the latching and unlocking process.

The 1a and 1b show the typical application of the connecting elements according to the invention, namely a protective grid, in a partial representation.

How best 1a shows is a grid field 52 whose grille is from a frame 53 is usually encircled from construction profiles, with its vertical legs of this frame 53 on vertical posts 51 fastened by means of the connecting elements according to the invention, namely at two attachment points one above the other.

In the following, the two connecting elements are considered individually, first on the basis of 2 and 3 the latching connection element 3 :
Here is a latching connection element at the upper attachment point 3 used and at the bottom connection point a non-latching connection element 3 ' ,

In 1a is the grid field 52 in the suspended state at the post 51 represented, so with a locked upper connecting element 3 while in the presentation of the 1b at the upper latching connection element 3 , the state is dargstellt shortly before or after snapping. Additionally is in 1a the unlocking tool 54 shown with the latching connection element 3 can be unlocked when needed.

The 1c and 1d show the two fasteners 3 . 3 ' in the state according to 1b in enlarged detail, which will be referred to later.

In 1e is analogous to the representation of 1c the latching connection element 3 an additional part 23 shown supplemented.

First shows 2 B - longitudinal 10 considered - as by means of the connecting element 3 two approximately parallel construction profiles 1a , b, on the facing each other One side each in their longitudinal direction 10 running, undercut groove 2a , b for attaching attachments, with the help of the interposed connecting element 3 be fixed against each other, which is based on the exploded view of the 2a becomes clearer.

The - usually made of plastic - body 4 this latching connection element 3 is on the one hand by a clamping screw 5 penetrated, whose shaft in the direction of a construction profile 1a protrudes and there in a sliding block 7a is screwed in, by tightening the clamping screw 5 in the local groove 2a is jammed.

This is the basic body 4 firmly with its one contact surface 4a on the outside of the one construction profile 1a screwed fitting.

In the other construction profile 1b is in the connecting element 3 facing outside in the local undercut groove 2 B also a nut 7b jammed with the help of a suspension screw 15 , with their shaft and widened head so far on the outer surface of the construction profile 1b that she projects - as best in 1c to recognize - in the latching connection element 3 can be hung on her projecting shaft.

Since the length of the shaft is dimensioned accordingly, then lies the other contact surface 4b of the basic body 4 at a small distance or possibly touching the outer surface of this construction profile 1b across from.

For this purpose, the basic body 4 designed as follows:
As 2 and 3 show is the main body 4 which has approximately a cuboid shape, symmetrical to its median plane 12 formed on the middle between the two mutually parallel contact surfaces 4a , b runs and perpendicular to the passage direction 11 lies in which the clamping screw 5 and suspension screw 15 be plugged through and in which the corresponding recesses described later are consistently open.

The symmetrical design serves to the connecting element 3 with each of the two sides on one of the construction profiles 1a , b to screw tight.

In the upper area has the main body 4 via one in the direction of passage 11 continuous clamping passage 6 for passing the clamping screw 5 , wherein one opposite the respective contact surface 4a , b each lower-lying shoulder 6a as a contact surface for the widened head 5a the clamping screw 5 serves, which thereby in the assembled state with her head 5a not on the appropriate investment area z. B. 4b protrudes, but with its shaft end opposite to the other contact surface z. B. 4a since they are there in the nut 7 is screwed in.

The clamping passage 6 is transverse to the passage direction 11 completely from the main body 4 enclosed.

On the other hand, the suspended passage below it is different 16 , except in the direction of passage 11 - In addition, also transversely to the passage direction 11 to one side, that is to one of the connection surfaces 4c which the two contact surfaces 4a , b connect and longitudinally 10 lie, is open.

In the vicinity of the suspension passage 16 is each of the two contact surfaces 4a , b of the main body 4 lowered relative to the rest of the contact surface to make room for the widened head to be accommodated there 15a a suspension screw 15 to create, in the suspended state also not on the corresponding contact surface 4a , b should project.

How best the view of 3a shows, this recording room exists 16 from several individual rooms:
For one, from the recording room 17 for receiving the shank of a suspension screw 15 - as in 6b shown - which is open at the bottom.

This open page 17a is above a guide channel 14 with a funnel-shaped outwardly widening inlet area 18 in conjunction, whose flanks tapering towards each other 18a , b in the side surface 4c lead.

From the bottom of the hanging passage 16 protrudes integrally with the body 4 trained locking pin 8th upwards in the direction of the recording room 17 which is at its junction with the rest of the body 4 elastic on the middle plane 12 can be bent back and forth, so in 3a from left to right and vice versa.

In the unloaded state, the locking pin protrudes 8th with its front face so far against the open side 17a of the recording room 17 in that a shaft of a suspension bolt received therein 15 no longer down from the recording room 17 can be moved out, but then against the free end face of the locking pin 8th bumps and thereby in the recording room 17 is locked.

The locking pin 8th puts with his side fl Also one of the lateral boundaries of the guide channel 14 represents.

In the unloaded condition of the locking pin 14 is the guide channel 14 at its end, ie between the free end of the locking pin 8th and the end of the wall of the receiving space 17 , too narrow for passing a suspension screw 15 , as well as on the basis of 6c easy to recognize.

Since the locking pin 8th but elastic at the rest of the body 4 is attached, it gives way when inserting a suspension screw 15 in the direction of the recording room 17 so far from the guide channel 8th in an alternative space available for this purpose 20 back, which is also part of the Einhängedurchlasses 16 is that the suspension screw 15 in the recording room 17 and then back to the locking position according to 3a springs.

1c shows the stem of a suspension screw 15 who are currently in enema 18 located.

To one in the recording room 17 located suspension screw 15 remove from there again and the connecting element 3 from the suspension screw 15 To be able to remove, the connecting element has 3 an unlocking option on:
In the bottom of the hanging passage 16 next to the locking pin 8th on the side to the inlet 18 opens an unlocking 13 that the main body 4 from there to its lower end face 4e penetrates.

This unlocking opening 13 aims at a gap 19 in the lower wall of the guide channel 14 between the lower inclined surface 18b of the enema 18 and one of the locking pin 8th in the direction of this inclined surface 18b pointing extension 8a consists.

The cross section of the unlocking opening 13 is greater than the width of the gap 19 measured in the direction of the median plane 12 ,

Therefore, an unlocking tool 54 with a correspondingly shaped, slim shaft 54a , which is preferably double cranked - as in 1a visible - with the front, straight end of this shaft 54a from below through the unlocking opening 13 into the gap 19 pushed forwards, thereby increasing the width of this gap 19 is enlarged - as in 6b visible - and thereby the entire locking pin 8th in the alternative space 20 is pivoted.

This is the guide channel 14 open again on such a width that the hinged shaft of a suspension screw 15 from the recording room 17 over the guide channel 14 and the enema 18 from the connecting element 3 can be led out.

Thus unlocking the connecting element 3 not everyone with the simplest tools such as a screwdriver is possible, has the unlocking 13 - And accordingly, the front end of the shaft 54a of the unlocking tool 54 - A cross-section which has no two mutually parallel major surfaces as in any flat material, but a ring-segment-shaped cross section, as best in the view of the body 4 from below onto the lower end face 4e according to 3c is apparent.

However, if in this way a suspension screw 15 not immediately in the recording room 17 the latching connection element 3 locked to be recorded, but initially only temporarily the latching connection element 3 - And thus not latching - on a suspension screw 15 can be held in accordance with the 4 at the base body 4 initially an additional part 23 be attached, which preferably also consists of plastic.

This attachment 23 owns - in the direction of passage 11 considered - the shape of an inverted hook with a downwardly open Ein hängebucht 24 , which is large enough from the cross section to the shaft of a suspension screw in it 15 take.

The additional part 23 thus has two free-ending legs 23a , b, one of which is longer than the other and the attachment to the body 4 of the connecting element 3 serves.

The basic body possesses for this purpose 4 above the inlet 18 one over the side surface 4c protruding nose 27 extending over the entire depth of the main body 4 , So the width of the connection surface, extends.

In the upper part of the outer surface of the longer leg 23a of the additional part 23 is a correspondingly shaped, undercut groove 28 arranged in which the nose 27 in the passage direction 11 can be inserted.

At the same time in the free lower face of this longer leg 23 an acute-angled interior angle 29 formed at such a location that when inserting the nose 27 in the groove 28 in the supervision of the 3a best visible corner between the interface 4c and the lower flank 18b of the enema 18 in this interior angle 29 einfahr, whereby transversely to the passage direction 11 the additional part 23 positive fit on the base body 4 of the connecting element 3 is locked and at the same time the enema 18 of the basic body 4 through the longer thigh 23a of the additional part 23 is closed, as best in 4b seen.

With such a mounted additional part 23 outside on the connecting element 3 is it possible now, this connecting element 3 for the time being only with its additional part 23 on a protruding suspension screw 15 mount and thus remove from this very quickly and without complicated release of a lock.

The 5 show that in the 1a and 1b inserted at the lower attachment point, non-latching connection element 3 ' in perspective as well as in single views:
Also this connection element 3 ' has a passage in the upper area 11 So from a contact surface 4 'a to the other contact surface 4'b , open clamping passage 6 ' for receiving a corresponding clamping screw 5 ' , again with shoulder lowered from both sides 6'a for recessed recording of the head 5 'a a clamping screw 5 ' ,

Among them also has the non-latching connection element 3 ' via a Einhängedurchlass 16 ' with a built-in recording room 17 ' for the shaft of a suspension screw 15 ' However, here is missing on the one hand, the lock and on the other is the Einhängedurchlass 16 ' not to the side, but to the lower end face 4'e open.

Here, too, the enema widens 18 ' this suspension passage 16 ' towards the open side, limited by the converging inclined surfaces 18'a , b.

Between the unilaterally open receiving space 17 ' and the conical inlet 18 ' becomes the recording room 16 ' but limited by two parallel flanks 21a , B, whose distance is slightly larger than the diameter of the shaft one thereby to the receiving space 17 ' to be introduced Einhängeschraube 15 ' ,

The flanks 21a , b thus run parallel to the connecting surfaces 4'c , d.

Thus, this non-latching connection element 3 ' - as in the 1a and 1b visible - simply from the top of the protruding shaft of a suspension screw 15 ' be deferred.

When the suspension bolt 15 ' in the recording room 17 ' located, the connecting element can 3 ' also around the longitudinal axis of the suspension screw 15 ' be rotated, whereby the folding away or Heranklappen the upper connecting element according to 1a or 1b at the post 51 transverse to the plane of the grid field 52 becomes possible.

To the upper, latching connection element 3 engage and disengage, for which a limited movement in the longitudinal direction 10 of the profile, so the post 51 , is necessary, own the parallel flanks 21a , b of the non-latching connection element 3 ' a length that is at least the distance at the latching connecting element of the receiving space 17 to the lower inclined surface 18b equivalent.

So that in the non-latching connection element 3 ' suspended suspension screw 15 ' with her head 15'a not over one of the contact surfaces 4 'a respectively. 4'b protruding, here is the surroundings of the Einhängedurchlasses 16 ' opposite the contact surface 4 'a respectively. 4'b lowered.

For special applications nevertheless one in the receiving space 17 ' received safety screw 15 ' to be able to fix, runs below the receiving space 17 ' a threaded hole 26 through this body 4 ' with mouth in both connecting surfaces 4'c , d, so that from any page a locking screw 25 can be screwed, then the Einhängedurchlass 16 ' goes through and a moving out of the suspension screw 15 ' down from the recording room 17 ' prevented out.

1a, b

construction profile

2a, b

groove

3,

einrastendes connecting element

3 '

Not latching connection element

4, 4 '

body

4a, b, 4'a, b

contact surface

4c, d

interface

4'c, d

interface

4e, f, 4'e, f

face

5, 5 '

clamping screw

5a, 5 'a

head

6 6 '

Terminal passage

6a, 6'a

shoulder

7a, b

sliding block

8th

locking pin

8a

extension

10 10 '

longitudinal direction

11 11 '

The direction of passage

12

midplane

13

unlocking

14

guide channel

15 15 '

Suspension screw

15a, 15 '

head

16 16 '

Einhängedurchlass

17 17 '

accommodation space

17a, 17'a

open page

18 18 '

enema

18'a, b

sloping surface

18a, b

sloping surface

19

gap

20

alternative space

21a, b

flank

22

centering

23

attachment

23a, b

leg

24

Einhängebucht

25

Lock barrier

26

threaded hole

27

nose

28

groove

29

interior angle

50

guard

51

post

52

grid

53

frame

54

unlocking

54a

shaft

Claims (22)

Connecting device for connecting two construction profiles ( 1a , b), the undercut grooves ( 2a , b) on its outer side, approximately parallel to each other with a latching connecting element ( 3 ), which comprises - a basic body ( 4 ) with two opposing contact surfaces ( 4a , b) and two connecting surfaces connecting the contact surfaces on each side ( 4c , d), wherein the edges between abutment surfaces and connecting surfaces have a longitudinal direction ( 10 ) define. - a clamping passage ( 6 ), the basic body ( 4 ) from one to the other contact surface ( 4a , b) in the passage direction ( 11 ), - a clamping screw ( 5 ) passing through the clamping passage ( 6 ) is pushed through, with her widened head ( 5a ) on a shoulder ( 6a ) in the clamping passage ( 6 ) and with its free end from a contact surface ( 4a ) of the basic body ( 4 ) and into a sliding block ( 7 ) is screwed in, characterized by - one to one of the connecting surfaces ( 4c , d) open suspension passage ( 16 ) with a receiving space ( 17 ) for receiving in the passage direction ( 11 ) extending shaft of a suspension screw ( 15 ), - the receiving space ( 17 ) transversely to its passage direction ( 11 ) an open page ( 17a ), - one at the base body ( 4 ) arranged movable locking pin ( 8th ), which in its locked position the open side ( 17a ) of the recording room ( 17 ) so far that the shaft of a suspension screw ( 15 ) not from the recording room ( 17 ) through the open side ( 17a ) and - an opening device for moving the locking pin ( 8th ) in an open position. (generally) Connecting device according to claim 1, characterized in that the basic body ( 4 ) center symmetrical to the median plane ( 12 ) formed in the middle between the two contact surfaces ( 4a , b) lies. Connecting device according to claim 1 or 2, characterized in that the contact surfaces ( 4a , b) in the vicinity of the receiving space ( 17 ) to the median plane ( 12 ) and in particular in this area the basic body ( 4 ) in the passage direction ( 11 ), a maximum of 50%, better a maximum of 35% in the direction of passage ( 11 ) measured thickness of the entire body ( 4 ) owns. (Locking pins) Connecting device according to one of the preceding claims, characterized in that the locking pin ( 8th ) in one piece together with the basic body ( 4 ) is trained. Connecting device according to one of the preceding claims, characterized in that the locking pin ( 8th ) from the recording room ( 17 ) opposite side of the Einhängedurchlasses ( 16 ) in the Einhängedurchlass ( 16 ) protrudes. Connecting device according to one of the preceding claims, characterized in that the Einhängedurchlass ( 16 ) a funnel-shaped inlet area ( 18 ), of two obliquely inclined surfaces ( 18a , b) is formed. Connecting device according to one of the preceding claims, characterized in that of the funnel-shaped inlet ( 18 ) in the reception room ( 17 ) a guide channel ( 14 ), which on one side of the locking pin ( 8th ) is limited. Connecting device according to one of the preceding claims, characterized in that the opening device has an unlocking passage ( 13 ) in the main body ( 4 ), which faces a gap ( 19 ) between the locking pin ( 8th ) and the inlet ( 18 ) and the hanger passage ( 16 ) on the from the gap ( 19 ) opposite side of the locking pin ( 8th ) an alternative space ( 20 ) comprises for displacing the locking pin ( 8th ) in the open position. Connecting device according to one of the preceding claims, characterized in that the locking pin ( 8th ) one to the gap ( 19 ) indicative extension ( 8a ), whose one flank the guide channel ( 14 ), and its tip against the gap ( 19 protrudes. Connecting device according to one of the preceding claims, characterized in that the unlocking opening ( 13 ) has a rectangular, in particular arcuate cross section and in particular funnel-shaped tapers from outside to inside. (Mounting aid) Connecting device according to one of the preceding claims, characterized in that the connecting element ( 3 ) an additional part ( 23 ) as an assembly aid, which on the connection surface ( 4c ) with the open side ( 17a ) of the recording room ( 17 ) and a downwardly open Einhängebucht ( 24 ) for hanging the shaft of a suspension screw ( 15 ), which in the passage direction ( 11 goes through). Connecting device according to one of the preceding claims, characterized in that the additional part ( 23 ) on the base body ( 4 ) is fastened by insertion in the passage direction ( 11 ). Connecting device according to one of the preceding claims, characterized in that in the assembled state of the additional part ( 23 ) on the connecting element ( 3 ) the additional part ( 23 ) the inlet ( 18 ) of the suspension passage ( 16 ) and the additional part ( 23 ) for the most part outside the main body ( 4 ) is located. Connecting device according to one of the preceding claims, characterized in that in the assembled state of the additional part 23 on the connecting element 3 the additional part 23 positive fit, in particular both above and below the inlet 18 , at the base 4 of the connecting element 3 is attached. (Non-latching connection element) Connecting device according to one of the preceding claims, wherein the connecting device comprises a non-latching connecting element ( 3 ' ), comprising - a base body ( 4 ) with two opposing contact surfaces ( 4a , b) and two connecting surfaces connecting the contact surfaces on each side ( 4c , d), - a clamping passage ( 6 ), the basic body ( 4 ) from one to the other contact surface ( 4a , b) in the passage direction ( 11 ), - a clamping screw ( 5 ) passing through the clamping passage ( 6 ) is pushed through, with her widened head ( 5a ) on a shoulder ( 6a ) in the clamping passage ( 6 ) and with its free end from a contact surface ( 4a ) of the basic body ( 4 ) and into a sliding block ( 7 ) is screwed in, characterized by - one to one of the end faces ( 4e , f) open suspension passage ( 16 ' ) with a receiving space ( 17 ' ) for receiving the shaft of a suspension screw ( 15 ' ), - the receiving space ( 17 ' ) transversely to its passage direction ( 11 ) an open page ( 17'a ) having. Connecting device according to one of the preceding claims, characterized in that the receiving space ( 17 ' ) a conical inlet ( 18 ' ) on the open side ( 17'a ) and two flanks ( 21a , b) between the conical inlet ( 18 ' ) and the recording room ( 17 ' ) parallel to each other. Connecting device according to one of the preceding claims, characterized in that the length of the flanks ( 21a , b) is at least as large as in the latchable connecting element ( 3 ), the distance from the recording room ( 17 ) to the narrowest point of the conical inlet ( 18 ). Connecting device according to one of the preceding claims, characterized in that on the contact surfaces 4a , b over at least part of the length in the longitudinal direction 10 each extending a centering projection 22a , b is formed in the groove 2a , b of the construction profile 1a , b fits. Connecting device according to one of the preceding claims, characterized in that below the receiving space ( 17 ' ) transversely to the passage direction ( 11 ' ) a threaded hole ( 26 ) in the main body ( 4 ' ) is arranged for screwing a locking screw 25 passing the hang-in passage ( 16 ' ) goes through. Protective grid ( 50 ) consisting of - floor-mounted or ceiling-mounted, spaced-apart posts ( 51 ) in the form of a construction profile ( 1a ) and - inter-grid fields ( 52 ) with an outer peripheral frame ( 53 ), whose parallel to the posts ( 51 ) running leg construction profiles ( 1b ) and - a connecting device according to one of the preceding claims between the posts ( 51 ) and the parallel legs of the frame ( 53 ). Protective grid ( 50 ) according to claim 20, characterized in that the latching connecting elements ( 3 ) with its open interface 4c are mounted towards the surface to be blocked off. Protective barrier ( 50 ' ) consisting of - floor-mounted or ceiling-mounted, spaced-apart posts ( 51 ) in the form of a construction profile ( 1a ) and - mounted cross struts whose end faces with a latching connecting element ( 3 ) according to one of the preceding claims between the posts ( 51 ) is mounted.