WO2012025198A1

WO2012025198A1 - Electrical connection of a safety switching device

Info

Publication number: WO2012025198A1
Application number: PCT/EP2011/004054
Authority: WO
Inventors: Jürgen Menz
Original assignee: Menz Juergen
Priority date: 2010-08-27
Filing date: 2011-08-12
Publication date: 2012-03-01
Also published as: EP2609608A1; EP2609608B1; DE102010035692A1; ES2583357T3; DK2609608T3

Abstract

The invention relates to a safety switching device, in particular for power-operated systems, such as rolling doors, rolling gates, doors, vehicle hoists, work platforms, and the like, comprising at least one switch chamber (3) having two switch surfaces, which trigger a switch signal fed to an evaluating unit in the event of a contact due to deformation of the switch chamber (3), wherein the switch surfaces can be connected at an end of the switch range to a respective switch line. According to the invention, a safety switching device is provided that is improved relative to the prior art in particular in regard to the durability and function of the electrical connections. This is achieved in that a plug (21) can be connected to the switch chamber (3) and clamped to the switch chamber in order to establish an electrical connection.

Description

Electrical connection of a safety switching device

DESCRIPTION

The invention relates to a safety switching device, in particular for power-operated equipment, such as rolling shutters, rolling grilles, doors, lifting, working platforms and the like, with at least one switching chamber with two buttons, the one caused in particular by deformation of the switching area of a touch

Trigger evaluation unit supplied switching signal, wherein the

Buttons end of the switching range with one switching line are connectable. Furthermore, the invention relates to an assembly method for such a safety switching device.

Such a safety switching device is known from DE 27 194 38 A1. This safety switching device has a switching profile, which has an empty chamber following the attachment region, which serves the wake of the drive in power-operated systems, etc. This is followed by a switching chamber, in the

Switching elements are arranged. In addition, this indicates

Switching profile subsequent to the switching chamber on a rounded sealing lip to improve the tightness. The switching elements are via cables with a control unit and a voltage source connected. How the cables are connected to the switching elements is not shown in detail. Opposite to the

Cable connection side, the switching elements are connected to each other via an electrical resistance. This resistor is embedded directly in the switching chamber. An end protection of the

Switching chamber is not provided, so that in particular the electrical connections are prone to mechanical

Damage and disturbances are caused by, for example, penetrating water.

The invention is based on the object

To provide safety switching device, which is improved over the prior art, in particular with regard to the durability and function of the electrical connections. Furthermore, an assembly method for such a safety switching device is to be specified.

This object is achieved in that a plug is provided, which is for establishing an electrical connection to the

Switching chamber of the safety switching profile attachable and can be clamped with the switching chamber. Such a connector greatly simplifies the manufacture of an electrical connection with the switching area. Such a compound, for example, in contrast to a solder joint at any time and at any place without further aids to produce and optionally also solvable again. In a general embodiment, the plug is adapted to cooperate with the buttons of the switching chamber

Has contact surfaces. Furthermore, the fact that the plug is clamped to the switching chamber, created a permanently strong and tight connection. This connection is in terms of

Durability, for example, compared to an adhesive bond, which may have peeling phenomena over time, much better. The safety switching profile preferably has one-sided then to the switching chamber, a hollow profile of a

elastomeric material and on the opposite side a mounting area. However, the switching chamber can also be designed independently within the scope of the invention or combined with other functional parts.

In a preferred embodiment of the invention, however, the plug has pins which can be inserted into electrically conductive zones of the buttons. These pins are in particular made of a non-corrosive metal, for example stainless steel, tin, nickel or a similar material. The pins are preferably cylindrical, but may for example be slightly conical, with the pointed side of the cone either for easier insertion into the conductive zones on the side facing away from the plug or for a good grip in the electrical zones on the can be arranged facing the plug side.

In a further embodiment of the invention, the plug with the

Switching line connected. In this case, the switching line on two insulated jumper wires, each connected to the pins,

for example, are soldered. The switching line is connected at its free end, in particular with a safety switching device, which in the event that, for example, a closing roller door impinges on an obstacle and the buttons come into contact with each other by a deformation of the switching chamber and thus a

Switching signal is triggered, the closing movement of the roller shutter stops or the roller door opens again. The switching line can with its free end but also with a second plug for

Connection be connected by two safety switching devices.

In a further embodiment, the pins are connected to a resistor. Such a trained connector is called the end part opposite to the wired with a switching line

Plug attached to the switching chamber. With this element, the buttons are defined electrically connected to each other and, for example, in the event of damage to a button, a button break can be evaluated and detected by the safety relay. This function works independently of the detection of a dangerous situation caused by the

mutual contact of the buttons is caused. Furthermore, it is also provided in the context of the invention, for example, two connectors, for example, to form a

Angle part to connect two safety switching devices directly to each other. Here also any other combinations are possible.

In a further development of the invention, the plug has a housing which encompasses the end region of the switching chamber. This housing establishes a tight connection with the switching chamber as a clamp and in particular prevents the penetration of dirt of any kind and / or of liquids into the hollow profile of the switching chamber.

In a further embodiment of the invention, a holding part in the end-side hollow profile region of the switching chamber can be used. This holding part, which is functional for making the clamp with the

Plug cooperates, in a further embodiment, at least approximately the inner contour of the switching chamber

corresponding outer contour. This ensures on the one hand that the switching chamber in the area in which the holding part is used, in all circumstances maintains its original contour, for example, if a tight-fitting housing of the

Connector would compress the switching chamber or the buttons. On the other hand, by a subsequently explained connection of the plug with the holding part a safe and permanent attachment of the plug made on the safety switching profile.

In a further development of the invention, the holding part is trapezoidal, at least over a partial area, wherein the holding part is used with the wide trapezoidal base surface in advance in the switching chamber. By means of this configuration and arrangement, a particularly reliable attachment of the plug to the safety shift profile, which will be explained below, is possible. Instead of the trapezoidal design, which preferably includes all the longitudinal and transverse sides of the holding part, also another conical or tapered configuration can be realized.

In a further embodiment of the invention, the holding part has at least one threaded channel cooperating with a screw opening in the plug, and a screw can be screwed through the screw opening into the threaded channel. Two are preferred

Threaded channels in the holding part and corresponding

Screw holes provided in the plug. The

Assembly method provides that when screwing the screws into the threaded channels deep into the switching chamber inserted

Holding part again to the plant to a bottom wall of the housing of the plug from which is pulled out to the switching chamber. As a result, the walls located between the holding part and the housing of the switching chamber by the trapezoidal

Design of the holding part increasingly clamped to the holding part and the housing. In a further embodiment, or alternatively, the plug or its housing may be formed on the inside trapezoidal or tapered and vice versa to the corresponding trapezoidal or other design of the holding part. That is, the narrower one

Wall cross section is at the free end area and the wider one

Wall section is adjacent to the bottom wall of the plug arranged. As a result, a firm and (liquid) tight connection between the plug and the safety circuit profile is made, which is more reliable in terms of durability and tightness than, for example, an adhesive connection. Thus, in particular, the electrical connections are permanently protected.

Alternatively, the holding part can also be configured as one or more dowels, which are inserted into the switching chamber and spread by a respective screw, which is screwed through the screw hole in the dowel. By spreading the jamming of the components is produced. The corresponding

Assembly method preferably provides that the plug, the dowel and the screw are pre-assembled and preassembled so

Assembly placed on the switching chamber or used and then clamped.

A further alternative provides that the holding part is formed integrally with the plug. In this case, for example, a (rubber) -elastic mass is arranged at least in partial regions of the inner part of the plug, which is connected on the one hand to the bottom wall of the plug and on the other hand to a plate. After the thus formed plug plugged onto the switching chamber

or with the holding part in the interior of the

Switching chamber is inserted, is pulled by at least one screwed through a screw hole of the plug screw into the plate screw the plate to the bottom wall of the plug and thereby the elastic mass for producing a deadlock with the

Changes in the switching chamber deformed. In the context of the invention, however, other means and devices for producing a deadlock are provided. Allen configurations, it is common that the plug is firmly connected (even with the application of tensile forces) and tight with the switching chamber, but if necessary by loosening the screw can be removed again. Is not this required or desired, the at least one screw can be secured against loosening. In this case, it is also conceivable to replace the screw by a drawstring in the manner of a self-locking cable tie, with which the tension of the holding part and the plug is made. In this case, then the drawstring is attached to the holding part, while the screw opening as

self-clamping passage opening is formed.

In a further embodiment of the invention, a cap covering the trailing region is attached to the plug. With this cap, the wake area is effectively protected against the ingress of dirt and also offers an appealing visual

Design of this end of the safety switching device.

This cap covers the trailing area so that a

Air circulation of the interior of the wake area with the

Environment is ensured. As a result, possible deformations of the tail area are hindered in any way.

In a further development of the invention, the cap can be clamped to the plug. This represents a particularly simple one

Connection possibility. Furthermore, for example, for differently configured safety switching devices, but all have an equally trained switching chamber,

different caps are installed.

Further advantageous embodiments of the invention are described in the drawings, are described in more detail in the embodiments illustrated in the figures of the invention. Show it: 1 shows a section through a safety switching profile, with which a plug, a holding part and a cap can be connected, Figure 2 is a side view of an inventive

plug,

3 is a plan view of a plug according to Figure 2, Figure 4 is a plan view of a holding part for the plug,

5 shows a side view of a holding part according to Figure 4,

6 is a plan view of a cap,

7 shows a side view of a cap according to FIG. 6 and FIG

8 is a perspective view of a

Safety switching profile with mounted holding part and a plug and a cap in one

Preparing for installation position

In Figure 1, designed as a hollow profile safety switching profile 1 is shown, which has a mounting portion 2, a thereto

having subsequent switching chamber 3 and an adjoining tail area 4. The safety switching profile 1 is made of an elastomeric material, for example a rubber material.

At the attachment area 2 facing away from the inner surface of the

Switching chamber 3 is a switching element 5, which forms the first button, incorporated, which is integral with the wall of the mounting portion. 2 is made. The switching element 5 is designed so wide that it occupies the entire inner wall of the switching chamber 3. The switching element 5 differs from the rest of the wall in that it is formed by the addition of conductive materials electrically conductive. Embedded is a stranded wire 6a for improving the conductivity. Approximately centrally on the switching element 5 bead or strip-like projections 7 are formed, which are seen in cross-section, cloverleaf-shaped and along the switching element. 5

run like a rod. In the opposite wall of the switching chamber 3, a second button forming switching strip 8 is embedded, which is made in one piece with the wall and also electrically conductive by adding conductive materials. On the switching strip 8 strip-shaped elevations 9 are formed, which extend laterally next to the projections 7 and have approximately the same height as the strand with the projections 7. In the switching strip 8, an electrically conductive wire 6b is also embedded.

On the switching element 5 are laterally adjacent to the elevations 9 am

Switching strip 8 strand-shaped thickenings 10 are formed, which protrude in the direction of the opposite switching strip 8. These strand-shaped thickenings 10 serve, in particular for lateral bending or displacement of the switching chamber 3, to ensure a secure contact with the elevations 9. The thickenings 10 have the highest height in the vicinity of the elevations 9 and run out laterally. But they can also be flat, so just run to a cross section through the switching chamber 3. The thickenings 10 may have the greatest height but also further outside the elevations 9 on the switching strip 8, and so on. that they protrude from the wall of the switching chamber 3. Also, a secure contact of the thickenings 10 is achieved with the elevations 9. The outer width of the switching chamber 3 corresponds approximately to the

Caster area 4. However, the switching chamber 3 has only a small height (inner extent between mounting area 2 and caster area 4), while the caster area 4 is significantly more than twice as high. Furthermore, the side walls of the switching chamber 3 are arcuately curved and designed substantially thinner than the subsequent lateral walls of the trailing area 4, which are made essentially straight. In the arcuately curved side walls of the switching chamber 3 notches 11 are provided on the inside thereof, which have a part-circular cross-section and cause a further elasticity of the side walls of the switching chamber 3. In the trailing area 4 diagonally oriented strip-like struts 12 are provided which are extruded in one piece with the trailing area 4 and cause a stiffening of the trailing area 4 and targeted forwarding of forces to the switching chamber 3, so that in particular lateral or obliquely acting on the trailing area 4 forces the respective strut 12 are forwarded and are guided on the curved wall of the switching chamber 3.

To further improve the power flow 4 reinforcing strips 13 may be attached to the side walls of the trailing area, which are about two thirds of the height between the articulation points of the struts 12th

turn off. This configuration and shaping of the walls of the switching area 3 and the trailing area 4 result in particularly favorable conditions for a quick triggering of switching pulses. Furthermore, in the extension of one of the walls of the trailing area 4, a sealing lip 14 may be formed. The sealing lip 14 is thereby decoupled from the wall of the trailing area 4 that on both sides

Notches 15 and 16 are provided so that a defined cross section for the connection of the sealing lip 14 to the wall of the

Caster area 4 results.

Furthermore, a fastening strip 17 is present, which engages by means of projections 18 in lateral grooves 19 of the mounting portion 2. At the Projections 18 facing outer surface of the wall between the mounting portion 2 and switching portion 3 are rib strips 20th

attached, which reach up to the projections 18 and support the switching area 3, so that the strand-like thickenings 10 have a rear support on the projections 18. The fastening strip 17 is attached to the system to be secured, for example by screwing.

Figure 2 shows the side view of a plug 21 which is attachable to the end region of the switching chamber 3 of the safety circuit profile 1. Figure 3 shows a corresponding plan view of the plug 21 in its interior. The plug 21 is made of a plastic material and has a housing 22, in the bottom wall 23, two pins 24a, 24b are recessed. The pins 24 a, 24 b are connected to a switching line 25

connected, which is led out laterally from the housing 22. Alternatively, the pins 24a, 24b may be interconnected via a resistor. The pins 24 a, 24 b have a length such that they protrude from the housing 22. The housing 22 has an inner contour 26, which corresponds to the outer contour of the switching chamber 3. The plug 21 is with the housing 22 - as will be explained below to Figure 8 - attached to the switching chamber 3 so far until the Außenwandlungen the

Switching chamber 3 abut the inside bottom wall 23 of the housing 22. During the Aufsteckvorgangs the pins 24a, 24b are pressed into the strands 6a, 6b and make an electrical contact between the switching line 25 and the switching element 5 and the switching strip 8 ago.

Furthermore, the plug 21 has on the outer side of the switch-line-side end attachment grooves 27a, 27b, in which a subsequently explained cap can be clamped. Finally, in the bottom wall 23, two screw openings 28a, 28b embedded by the screws for

Connection with a subsequently also explained holding part are feasible.

Figure 4 shows a plan view of a holding part 29 and Figure 5 a corresponding side view. The likewise made of a plastic material holding part 29 is - as shown in Figure 8 - in the

Hollow profile area of the switching chamber 3 inserted. The holding part 29 has an outer contour, which is largely adapted to the inner contour of the switching chamber 3, in particular of the switching element 5 and the switching strip 8. Furthermore, the holding part 29 has two threaded channels 30a, 30b in the screws for fastening the plug 21 are screwed. In

Extension of the thread channels 30a, 30b, the holding part 29 has two extensions 31a, 3b, in which also threads is incorporated. The holding part 29 is inserted into the hollow profile area of the switching chamber 3 with the protruding extensions 31 a, 31 b. In addition, the holding part 29 (on the switching element 5 side facing) formed trapezoidal, wherein the wide trapezoidal base surface on the side of the extensions 31a, 31b is arranged. The holding member 29 is inserted with the protruding projections 31a, 31b in advance in the hollow profile portion of the switching chamber 3 and indeed approximately so deep that it is outside the contact area (over the hollow profile area) with the side walls of the subsequently erected plug 21. In this case, the plug 21 until the investment of the

Hollow profile area attached to the bottom wall 23 on the hollow profile area. If subsequently plugged onto the switching chamber 3 plug 21 is screwed to the holding part 29, the holding part 29 is again pulled so far out of the hollow profile portion of the switching chamber 3 until it also rests against the bottom wall 23 of the housing 22 of the plug 21. In the Ausziehvorgegang this trapezoidal design of the holding member 29 causes an increasing clamping and pressing the

elastic walls of the switching chamber 3 between the holding part 29 and the side walls of the housing 22 of the plug 21. Thus, the plug 21 is firmly and tightly connected to the safety switching profile 1. Figure 6 shows a plan view of a cap 32 and Figure 7 the

corresponding side view. The cap 32 is made of a rubber material and is attached to the one-sided area of the trailing area 4. Accordingly, the cap 32 has an inner contour, which is the Outer contour of the trailing area 4 corresponds. As can be seen in particular from FIG. 7, the cap base 33 is drawn in, starting from a central region to the side walls of the cap 32, approximately as far as the middle of the cap side walls. This embodiment serves to ensure that the cap can also deform easily when the trailing region 4 is deformed. Furthermore, this is a problem-free

Continuation of the switching line 25 possible. For internal fixation on the trailing area 4, the cap 32 has three webs 34 which are supported on the inner wall of the trailing area 4. Finally, on the side facing the plug 21, the cap 32 has two fastening beads 35a, 35b which can be inserted into the fastening grooves 27a, 27b. Between the two Befestigungswulsten 35a, 35b, the cap 32 has no side wall. As a result, no airtight, but only a dust-tight connection to the inner region of the wake region 4 is produced in this region, so that air can easily circulate with the inner region when the wake region deforms.

Figure 8 shows a somewhat simplified perspective view of the

Safety switching profile 1 with the inserted into the hollow profile portion of the switching chamber 3 holding part 29. Furthermore, it is shown that in the

Connecting regions of the switching chamber 3 to the subsequent

Fixing portion 2 and the trailing portion 4 each have a slot 36a, 36b, for example, cut or milled. These slots 36a, 36b make it possible to attach the plug 21 to the switching area 3 by inserting the side walls of the plug 21 into these slots 36a, 36b

immerse.

The plug 21 and the cap 32 are, as shown by an arrow, attached to the safety switching profile 1, wherein the

Befestigungswulste 35 a, 35 b are inserted into the mounting grooves 27 a, 27 b. Finally, the plug 21 with two, not shown

Screwed to the holding part 29 and the holding part 29 until it rests against the bottom wall 23 of the plug 21 for producing the dense Clamp pulled out of the safety switching profile 1.

LIST OF REFERENCES:

1 safety switching profile 31 a, 31 b extension

2 mounting area 32 cap

3 switching chamber 33 cap bottom

4 caster area 34 bar

5 switching element 35a, 35b Befestigungs¬

6a, 6b strand bead

7 projection 36a, 36b slot

8 switching strips

9 survey

10 thickening

1 1 notch

12 strut

13 reinforcing strips

14 sealing lip

15 notch

16 notch

17 fixing strip

18 lead

19 groove

20 ribbed bar

21 connectors

22 housing

23 bottom wall

24a, 24b pen

25 switching line

26 inner contour

27a, 27b fastening groove

28a, 28b screw opening

29 holding part

30a, 30b threaded channel

Claims

PATENT APPLICATIONS

1. Safety switching device, in particular for power-operated equipment, such as rolling shutters, rolling grilles, doors, lifting, working platforms and the like, with at least one switching chamber (3) with at least two buttons, the one touch

Trigger evaluation unit supplied switching signal, wherein the

Buttons are the end of the switching range with a respective switching line (25) are connectable,

characterized in that a plug (3) is provided, the end of the switching chamber (3) attachable and with the

Switching chamber (3) can be clamped.

2. Safety switching device according to claim 1,

characterized in that the plug (21) pins (24a, 24b) which in electrically conductive zones of the buttons

are pluggable.

3. Safety switching device according to claim 2,

characterized in that the pins (24a, 24b) with the

Switching line (25) is connected.

4. Safety switching device according to claim 2,

characterized in that the pins (24a, 24b) with a

Resistor () is connected.

5. Safety switching device according to one of the preceding claims,

characterized in that the plug (21) has a the end portion of the switching chamber (3) comprising housing (22).

6. Safety switching device according to one of the preceding claims,

characterized in that a holding part (29) in the end-side hollow profile region of the switching chamber (3) can be inserted.

7. Safety switching device according to claim 6,

characterized in that the holding part (29) has an at least approximately the inner contour of the switching chamber (3) corresponding outer contour.

8. Safety switching device according to one of claims 6 or 7,

characterized in that the holding part (29) is formed trapezoidal at least over a partial area, and that the

Holding part (29) with the wide trapezoidal base in advance in the switching chamber (3) can be used.

9. Safety switching device according to one of claims 6 to 8,

characterized in that the holding part (29) has at least one with a screw opening (28a, 28b) in the plug (21)

cooperating threaded channel (30a, 30b) and that a screw through the screw opening (28a, 28b) in the

Threaded channel (30a, 30b) can be screwed.

10. Safety switching device according to one of the preceding claims,

characterized in that on the plug (21) has a

Caster region (4) covering cap (32) can be fastened.

1 1. Safety switching device according to claim 10,

characterized in that the cap (32) on the plug (21) can be clamped.

12. An assembly method for a safety switching device, in particular for power-operated equipment, such as rolling shutters, rolling grilles, doors, lifting, working platforms and the like, with at least one switching chamber (3) with at least two buttons that trigger a switch an evaluation unit supplied switching signal, wherein the buttons are connectable at the end of the switching area with a respective switching line (25),

characterized in that a holding part (29) in the

Switching chamber (3) is inserted, a plug (21) is fitted end to the switching chamber (3) and finally the holding part (29) with the plug (3) for producing a solid and dense

Clamping of the plug (3) with the safety switching device (1) is clamped.