EP2617046A1

EP2617046A1 - Single-row emergency-stop switch-contact device

Info

Publication number: EP2617046A1
Application number: EP11758129.8A
Authority: EP
Inventors: Eberhard Schlegel; Kurt Blank; Rudolf Dolpp
Original assignee: Georg Schlegel GmbH and Co KG
Current assignee: Georg Schlegel GmbH and Co KG
Priority date: 2010-09-17
Filing date: 2011-09-15
Publication date: 2013-07-24
Anticipated expiration: 2031-09-15
Also published as: JP5728091B2; WO2012034698A1; EP2617046B1; CN103210460A; DE102010045629A1; JP2013541145A; US20130192968A1

Abstract

The invention relates to an electrical contact device (1), in particular an emergency stop switch-contact device, comprising a first switch contact unit (4) for creating or disconnecting an electrically conductive connection and a second switch contact unit (5) for creating or disconnecting an electrically conductive connection, wherein a first contact side (6) of the first switch contact unit is connected to a first contact side (9) of the second switch contact unit, and a second contact side (7) of the first switch contact unit is connected to a first connection contact (15) of the contact device and a second contact side (10) of the second switch contact unit is connected to a second connection contact (17) of the contact device, and wherein the two switch contact units are designed to be actuated by a movable push rod (3) acting thereon, characterised in that the two connection contacts are arranged, in relation to the push rod, opposite each other on the contact device and wherein the first and the second switch contact unit are arranged inside a mounting unit (3) that is provided for connection to an actuating device.

Description

"Single-row EMERGENCY STOP switch contact device"

The present invention relates to an electrical

Contact device according to claim 1 and a command device according to claim 16.

State of the art:

For safety reasons is for machinery and electrical

Equipment requires the provision of EMERGENCY STOP switches.

Such emergency stop switch, such. B. from DE 4 101 493 C2

known, on the one hand comprise an electrical

Contact device and on the other hand provided for the actuation of an actuator. This two-part construction is based on the fact that the actuating device, which is often referred to as an actuator, must be visible at all times and accessible for reliable operation. Only in this way can it be ensured that, in the event of danger, the machines or systems can be triggered mechanically in accordance with the switch-off switching command provided for this purpose. If such an emergency stop switch is intended to be arranged on a switchgear cabinet, it is suitable for safety and security

For clarity, the assembly of the

Actuator on the outside of the front side.

In order to wire the electrical contact device accordingly, so to be able to contact, this is preferably within

CONFIRMATION COPY of the cabinet. To ensure that the actuating device and the electrical contact device are correctly connected to each other according to the operating principle, a switch contact unit is provided for the second, which establishes an electrically conductive connection between its two contact points only if this mechanical connection is actually correct. This changes immediately by disconnecting this electrically conductive connection as soon as the operationally correct connection between

Actuator and electrical contact device is no longer given, for example, by intentional or unintentional separation of these two components. This may for example be the case during maintenance and / or testing, but a separation may also be due to a

Adversity or accident by external influence on the actuator, such. B. knocking or shearing done. In all these cases, the production of the intended safety condition for the plant and / or machine must necessarily be ensured, which is due to the described separation of the electrically conductive

Connection takes place.

Even then the operationally provided safety measure, such as shutdown or shutdown of the system and / or

Depending on the safety concept, to be able to guarantee the machine in the event of a hazard, if this is the case, eg. B. due to a corresponding event, by pressing the

Actuator is to be signaled, the electrical contact device comprises a second switching contact unit. This is connected in series with the first switching contact unit and disconnects an electrically conductive connection between its two contact points, which in normal operation case with correct operational connection between actuator and electrical

Contact device is made by this switching contact unit between these two contact points.

Such an electrical contact device of an emergency stop switch are thus assigned three switching states, namely: 1. Both switching contact units establish the to be realized by them, electrically conductive connection between their two electrical contact points. This is the case when a properly provided proper connection between the actuator and the electrical

Contact device is present.

2. The first of the two switching contact units separates the electrical connection between their two electrical connections which they are to make in proper operation

Contact points. This is always the case, for example, if there is no operationally correct connection between the actuating device and the electrical contact device.

3. The second switching contact unit separates the her in the correct operating condition to be produced, electrically conductive connection between its two electrical

Contact points. This is the case when an emergency stop request is made by operating the actuator.

Object of the invention:

The present invention is based on the object, an electrical contact device according to the introductory

described prior art to improve.

This problem is solved, starting from the generic term of the

Claim 1, by its characterizing features and by a command device according to claim 16. In the dependent claims advantageous and expedient developments are given.

Accordingly, the present invention relates to an electrical contact device, in particular EMERGENCY STOP switch contact device comprising

a first switching contact unit for the production or Separation of an electrically conductive connection and

a second switching contact unit for producing or separating an electrically conductive connection,

wherein a first contact side of the first switch contact unit is connected to a first contact side of the second switch contact unit, and a second contact side of the first switch contact unit is connected to a first contact terminal of the contact device and a second

Contact side of the second switching contact unit is connected to a second terminal contact of the contact device, and wherein the two switching contact units actuated by a sliding plunger acting on them

are formed. It is characterized by the fact that the two connection contacts, based on the plunger, itself

are arranged opposite to the contact device, and wherein the first and the second switching contact unit are arranged within a mounting unit, the

Connection is provided with an actuating device.

In this case, a contact is understood as a contact which is provided for connecting the electrical contact device to an external line. Such a contact can

for example, as a screw, as a plug contact, as

Clamping contact or the like may be formed. Internally, an electrically conductive contact connection element leads from

Connection contact to the associated switching contact unit. This switching contact unit can

For example, comprise a switching bridge having two of corresponding contact material contact points, which in turn each one preferably

are also assigned from corresponding contact material complementary contact point of a contact to be contacted contact element.

Such electrical contact devices are

usually manufactured in block form, for example in the form of terminal blocks. By providing appropriate

Locking elements is a simple and reliable connection between the electrical contact device and the Actuator possible. The inventively proposed construction of an electrical contact device is based on the finding that the two

Connection contacts of two series-connected switching contact units despite compliance with a predetermined

Housing width per switching element, even with a single-row construction not necessarily on the same side of the housing

must be led out, but by an appropriate training and leadership of a contact-connecting element, in particular while maintaining the appropriate required line cross-section and a z. B. in the longitudinal direction of the housing opposite terminal contact arrangement can be realized. This has the advantage that such a constructed electrical contact device saves half of the space requirement previously required in width, which was required to one of the two outgoing on the same side terminal contacts by means of a arranged next to the electrical contact device, second contact element on the opposite side respectively.

In particular, aggravating for such an approach, the required freedom of movement for the middle in the longitudinal direction through the housing of the electrical

Contact device slidably arranged and independent of the respective other switching contact unit actuation of each one switching contact unit according to the required for emergency stop switch states. On the one hand, there are large areas of space through elements of a

Contact control provided spring system occupied,

On the other hand, there are also overlaps between them

Spaces are kept free, especially in the axial direction to allow the required mobility of the plunger, the spring elements and the contact elements. Another problem is the required distance between the two series-connected switching elements in order to ensure a reliable separation of the respective electrically conductive connection can.

To realize a single-row electrical contact Device with two terminal contacts, which are arranged on two opposite sides of the housing, various approaches have been found. In a first approach, a contact fastener may be so

be formed and arranged in the interior of the housing, that it extends to form an electrically conductive connection between a contact point of a switching contact unit and a terminal contact transversely through the housing from one side to the other, wherein it is laterally on the plunger

passed by.

Preferably, this contact-connection element may have a flat, rail-like shape. This can be a

corresponding line cross-section can be realized. In order to be able to provide this sufficient over the entire link, a connecting portion between the contact of the switching contact unit and the

Connection contact "upright", so aligned substantially parallel to the plunger movement. As a result, the remaining space in this connection area for elements of the plunger, the filter system and other contact elements and, if necessary, contact connection elements remains freely available. In order to give the two contact areas of the contact-connection element in a direction usually rotated about 90 ° orientation, so a "flat" orientation, the transition points between the individual connecting portions of the contact-connection element may preferably be angled, preferably multiple angled over by two subsequent successive angles to achieve the structure described.

In a modified embodiment on the other hand, the contact-connecting element, for example, also flat and rail-like in shape but without the in the first

Embodiment described "upstand" in the intermediate area can be realized. This results from the height of the flat material plus certain tolerances of the required space area for the connection of the two formed on opposite sides of the housing Contact areas. Due to this comparatively low ceiling height of the contact-connecting element, a section in the plunger could be designed such that this in spite of the operation required for actuation of the two switching contact units Hub required by the contact-connection element

can be penetrated. The contact connection element can therefore be guided through the plunger in this embodiment.

In both of these embodiments, for example, in the plan view of an open housing an electrical

Contact device left and right below each one

Be arranged terminal, via which the two switching contact units spaced and through the

slidable plunger are arranged operable. Both

Switching contact units each have a bridge element, which, in a corresponding switch position, are connected in series in the upper right-hand housing region with a further contact connection element.

The contact connection element described so far extends in this embodiment described by way of example from the left contact region of the lower bridge element across the housing to the right terminal contact. That's the two

Switching contact units in series switching contact connecting element in the upper right housing area is thus located only on one side of the plunger.

For example, in an alternative embodiment, a contact of a switching contact unit with a connection contact could also be connected instead of one contact

Contact fastener, the contact connector transversely from one side of the housing to the other side of the

Housing be arranged running, which are the two

Switching contact units connected in series. At this

Embodiment could then be formed only on the respective side of the housing, left or right, at the both these contact-connecting elements, which connect a switching contact unit with a connection contact on the respective housing side, where these two Contacts are located. The wiring across the housing, laterally past the plunger and / or therethrough would then take place through the two switching contact units in series switching contact-connection element. The shaping and routing could be realized analogously in a corresponding manner, as described above for the contact connection element, which connects a switching contact unit with a connection contact.

In order to be able to position the two switching contact units when the connection between the electrical contact device and the actuating device is correct in accordance with the operation, so that these each have their associated, electrically conductive

Connect by closing the respective contact points, the plunger comprises a plunger head. This plunger head cooperates with a complementary mechanism that those three switching states for the electrical

Contact device as they relate to the

respective actuation case of the actuator are described in the introductory prior art, namely made in the usual case both electrically conductive connections, disconnected in case of failure, a first of the two electrically conductive connections and separated in emergency stop request switching state, the second of the two electrically conductive connections.

The spring system provided for positioning the plunger and / or a switching contact unit may comprise two separately formed spring elements, for example in the form of spiral springs. A first spring element can in this case bias the displaceable plunger in the axial direction, for example by end Federkraftbeaufschlagung so that with appropriate freedom of movement of the plunger - not correct connection between the electrical contact connection element and actuator - the

concerning electrically conductive connection

Repositioning of the relevant bridge element is disconnected. A second spring element, for example, act on the other bridge element, that this with correct connection between the electrical contact device and

Actuator assigned to her electrically conductive connection for the relevant switching contact unit

in the event of an emergency stop request, by actuating the actuating device but disconnecting it.

Thus, both switching contact units by a

such spring system can be controlled.

Furthermore, the present invention relates to a

Command device, in particular an emergency stop switch with an electrical contact device according to one of the above

described embodiments and provided for actuating the actuator.

Exemplary embodiment:

The following are with reference to the attached

Figures various embodiments described in more detail.

It show the:

FIGS. 1 and 2 show two different embodiments of an electrical contact device,

in particular an emergency stop switch contact device,

Figure 3 shows an alternative circuit arrangement to the

Embodiments in Figures 1 and 2 and

Figure 4 command device, in particular a

Emergency release.

Accordingly, Figure 1 shows an electrical

Contact device 1 with a housing 2 and a plunger movably guided therein 3. The contact device 1 comprises a first and a second switching contact unit 4,5 each for the production or separation of an electrically

conductive connection in dependence of the plunger position along its axially provided positions

according to the prescribed for EMERGENCY-STOP switch and detailed above switching positions. The first

Switching contact unit 4 comprises a first contact side 6, a second contact side 7 and a respective one of them

Contact points 6.1 or 7.1 connecting bridge element 8. This, too, may preferably comprise contact points 8.6 and 8.7 made of corresponding contact material. in the

shown state, the closed switching contact unit 8 produces an electrically conductive connection.

The second switching contact unit 5 comprises in a corresponding manner a first contact side 9 and a second contact side 10 with corresponding contact points 9.1 and 10.1 and a bridge element 11 and preferably formed thereon

Contact Points 11.9 and 11.10. With appropriate

Switching position of the plunger 3 for producing an electrically conductive connection are connected by closing the relevant contacts. In the illustrated state, however, this second electrically conductive connection is due to the

Switching position of the plunger 3 separately.

A first contact connecting element 13 connects the first contact side 6 of the first switching contact unit to a first contact side 9 of the second switching contact unit in order to connect these two in series.

A second contact connection element 14 connects the second contact side 7 of the first switching contact unit with a first connection contact 15, by means of which the electrical contact device can be contacted with an external conductor via the screw connection exemplified here.

A third contact connection unit 16 connects the second end of this series arrangement of first and second switching circuits. Contact unit of the second contact side 10 of the second contact unit with a second terminal contact 17th

As a result, via the screw connection, which in turn is shown by way of example, the second external connection to the

realized electrical contact device.

In this way, both electrical switching contact units are arranged within the one-row mounting unit performing housing 2 and are positioned by the plunger according to the respective switching position. In a particularly advantageous manner, despite this two with respect to the plunger on opposite sides of the housing 2 arranged connection contacts a single-row

Circuit design can be realized.

To operate the plunger 3 by one not here

shown actuating device, this plunger has a plunger head 18. In the illustrated embodiment, this is arranged on the front side of the plunger and projects with respect to the housing 2. For positioning of the plunger and / or a switching contact unit or both switching contact units is hereinafter a spring system 19th

intended. This comprises a front-side acting on the plunger first spring 20 and an example acting on the first bridge element, second spring 21st

In this embodiment, the contact-connection element 16 has a flat, rail-like shape, which passes through

multiple angulation in the middle connection area between the two contacts 10 and 17, so to speak, "folded"

is arranged. That is, in comparison to the other in the representation of the figure, for example, as flat arranged to be designated alignments this portion of the contact-connecting element 16 is arranged standing or formed. This advantageously allows a lateral

Verbeiführung on the plunger 3. This can also be a

comparatively large line cross-section can be realized without having to reduce the available for the plunger movement cross-sectional area in the same way. The embodiment of an electrical contact device illustrated in FIG. 2 basically shows a

However, in contrast to this, in Figure 4, the contact connection element 16 is not angled in such a way that it is guided past the side of the plunger, but remains in its basically flat in a plane shape and is passed through a recess in the plunger.

FIG. 3 shows one opposite to the first two

Modified circuit arrangements to the effect

Embodiment, that the first contact-connection element 13 ', the contact 8.6' of the first bridge element 8 'with respect to the plunger 3' in a housing disposed position opposite contact 11.10 of the second

Bridge element 11 'connects. For this purpose, the contact connection element 13 'extends in a similar manner as in the embodiments in Figures 1 and 2, the third contact connection element 16. Also for this purely exemplary here schematically illustrated circuit arrangement, both a laterally guided on the plunger assembly may be provided as also a guided through this.

Accordingly, the third contact connection element 16 'runs only on the right side in relation to the representation in FIG

Housing, so right and only on one side of the plunger 3 '.

In the figure 4 is one of an electric

Contact device 1 and an actuator 23 existing

Command device 22 shown, in one in one

Wall 24 built condition. List of reference numbers:

1 Electrical contact device

2 housing / mounting unit

3 pestles

4 first switching contact unit

5 second switching contact unit

6 first contact page

7 second contact page

8 first. bridge element

9 first contact page

10 second contact page

11 second bridge element

12

13 first contact connection element

14 second contact connection element

15 first connection contact

16 third contact connection element

17 second connection contact

18 plunger head

19 spring system

20 first spring

21 second spring

22 command device

23 actuators

24 wall

Claims

Claims :

1. Electrical contact device (1), in particular EMERGENCY STOP switch contact device, comprising

a first switching contact unit (4) for producing or separating an electrically conductive connection and

a second switching contact unit (5) for the production or. Separation of an electrically conductive connection,

wherein a first contact side (6) of the first switching contact unit is connected to a first contact side (9) of the second switching contact unit, and a second

Contact side (7) of the first switching contact unit with a first terminal contact (15) of the contact device is connected and a second contact side (10) of the second switching contact unit with a second terminal contact (17) of the contact device is connected, and wherein the two switching Contact units through a person acting on them,

displaceable plunger (3) are designed to be actuated, characterized in that the two terminal contacts, based on the plunger, opposite to the

Contacting device are arranged, and wherein the first and the second switching contact unit within a

Mounting unit (2) are arranged, which is provided for connection to an actuating device.

2. Electrical contact device according to claim 1, characterized in that the electrical contact device is formed in a single row.

3. Electrical contact device according to claim 1 or 2, characterized in that a contact-connection element (14) is provided, which forms an electrical connection between a contact point on a first side of the plunger and a contact point on the first side opposite side of the plunger ,

4. Electrical contact device according to one of the preceding claims, characterized in that a contact connection element (14) connects a contact side (7) of a switching contact unit with a connection contact (15).

5. Electrical contact device according to one of

preceding claims, characterized in that a contact-connecting element (13) connects a contact (6) of the first switching contact unit with a contact side (9) of the second switching contact unit.

6. Electrical contact device according to one of

preceding claims, characterized in that the contact-connecting element (13) laterally on the plunger

passed by.

7. Electrical contact device according to one of

preceding claims, characterized in that the contact-connecting element (13) by the plunger

passed through.

8. Electrical contact device according to one of

preceding claims, characterized in that a bridge element (8) of a switching contact unit is passed through the plunger.

9. Electrical contact device according to one of

preceding claims, characterized in that a bridge element of a switching contact unit on the plunger

passed by.

10. Electrical contact device according to one of

preceding claims, characterized in that the plunger has a plunger head (18).

11. Electrical contact device according to one of

preceding claims, characterized in that a spring system (19) is provided for positioning the plunger and / or a switching contact unit.

12. Electrical contact device according to one of

preceding claims, characterized in that a spring system (19) is provided for positioning both switching contact units.

13. Electrical contact device according to one of

previous claims, characterized in that the first and the second switching contact unit at a

Corresponding to the correct connection of the contact device with a provided for their actuation actuator produces them each associated, electrically conductive connection.

14. Electrical contact device according to one of

preceding claims, characterized in that the first switching contact unit at a not correct operation of the correct connection of the contact device with the provided for their actuation actuator their

assigned, electrically conductive connection separates.

15. Electrical contact device according to one of

previous claims, characterized in that the second switching contact unit upon actuation of the

Actuator separates its associated, electrically conductive connection.

16. Command device (22), in particular EMERGENCY STOP switch,

consisting of an electrical contact device (1) according to one of the preceding claims and a

Actuator (23).