JP4157273B2 - Safety circuit - Google Patents

Abstract

The invention concerns a protective circuit provided with additional switching function by exciting an electric adjusting component. The excitation signals to said adjusting component (1) are guided, between a first removable plug-type connector (2) and the adjusting component inside a housing, by means of an adapter plug (4; 17) with another removable plug-type connector, such that with the second removable plug-type connector, a protective switch (12) can be inserted in the excitation circuit of the adjusting component.

Description

[0001]
TECHNICAL FIELD The present invention relates to a safety circuit for controlling an electrically operated member according to the superordinate concept of the main claim.
[0002]
For example, a so-called Zweihand; two-hand safety circuit for the control of an operating member or an electric machine is known from the following publications, in which a current circuit for feeding an electric machine by means of a separate emergency emergency shut-off switch Can be blocked at any time.
[0003]
“AEG-Hilfsbuch 1, Grundlender der Elektrotechnik, Elitera Verlag Berlin 1972, 417, 418”
Advantages of the invention In the safety circuit of the invention of the type mentioned at the outset, the characteristic features of claim 1 make it possible to achieve particularly advantageous advantages in a simple manner in an existing plug connector (e.g. Can be expanded in the electrical device as follows: a control signal for one operating member is connected externally inside a casing between the first separable plug connector and the operating member It can be expanded to be guided through possible safety switches. Thus, the safety circuit can be realized in the control circuit of the operating member, advantageously via an additional detachable plug connector, which is mechanically combined with the plug connector described above.
[0004]
According to an advantageous embodiment of the invention, an additional intermediate plug with two inputs can be fitted and fitted onto the first plug connector, and in some cases a single, unique Fastening with a central screw is possible, so that one input side forms a first plug connector for the control signal and the other input side forms a second plug connector for the safety switch It is. Such later installation and installation of the circuit is possible in a simple manner without any interventional manipulation or modification to the mechanical configuration of the device or to the control or regulation circuit. Thus, complicated cable, clamping or brazing operations are often omitted for devices that are often relatively difficult to access.
[0005]
Here, the control signal is guided in a known manner via a safety switch provided in series, and a Transorb diode can be connected to avoid faulty voltage peaks due to the safety circuit switching process. The Transzorb-diode bridges the poles of the control line.
[0006]
Advantageous embodiments are described in the subclaims.
[0007]
Drawings Embodiments of the safety circuit of the present invention will be described with reference to the drawings.
[0008]
FIG. 1 is a schematic view of a magnet as an electrically operated member having an additional plug connector for a safety switch.
[0009]
FIG. 2 is a detailed view of an additional plug with two inputs and one plug for the safety switch.
[0010]
FIG. 3 is an electrical equivalent circuit diagram.
[0011]
FIG. 4 is a schematic diagram of a second embodiment of the intermediate plug having two input sides or input side-terminal portions which are positioned at right angles to each other.
[0012]
FIG. 5 is a detailed view of the intermediate plug of FIG.
[0013]
6 is an electrical equivalent circuit diagram of the intermediate plug of FIG.
[0014]
FIG. 1 shows a magnet 1 as an electric operating member for a hydraulic system, which operates a control signal for operating the operating member with a first plug 2 via a connection cable 3. Supplied. According to the present invention, the plug 2 is not directly connected to the coupling coupling body in the casing of the magnet 1 but is connected via the intermediate plug 4.
[0015]
The intermediate plug 4 has an input side 5 for the control line and the other input side 6 for connection of a safety switch via an additional plug 7. The intermediate plug 4 is shown in detail in FIG. 2 for its input sides 5 and 6 and the additional plug 7. The output side 8 of the intermediate plug 4 is directly fitted and fitted onto the magnet 1 and attached thereto via a screw 9. The screw 9 is shown in the plan view of FIG. Inside the intermediate plug 4, the required electrical connection is formed by crimping or brazing. The further details shown here are not important to the invention.
[0016]
An electrical equivalent diagram of the safety circuit of the present invention is shown in FIG. Here, the control line for the magnet 1 between the connection terminal point 11 and the connection terminal point 10 on the input side 6 can be switched on or off using the safety switch 12. Thus, by fitting and fitting the additional plug 7, the safety switch 12 can be connected to the existing arrangement via the intermediate plug 4 with the trigger function selected for each application case.
[0017]
A transformer-diode 15 is provided between one pole 13 of the connection terminal of the magnet 1 to the output side 8 and the other pole 14 as a protection against a faulty voltage peak during the switching process. The connection terminal point 16 forms a ground connection terminal.
[0018]
In the second embodiment of FIG. 4, an intermediate plug 17 having input sides 5 and 6 arranged at right angles to each other is shown as a modified embodiment of the embodiment of FIG. The plug 7 through which the safety switch 12 is connected is inserted in the longitudinal direction of the magnet 1.
[0019]
FIG. 5 shows various views of the intermediate plug 17 having the input sides 5 and 6 arranged at right angles to each other in FIG. Reference may now be made to the description of FIG.
[0020]
The equivalent circuit diagram of FIG. 6 shows different geometric orientations of the input sides 5 and 6 compared to the equivalent circuit diagram of FIG. 3, where the equivalent circuit diagram has the same function.
[Brief description of the drawings]
FIG. 1 is a sketch of a magnet as an electrical operating member having an additional plug connector for a safety switch.
FIG. 2 is a detailed view of an additional plug having two inputs and one plug for a safety switch.
FIG. 3 is an electrical equivalent circuit diagram.
FIG. 4 is a schematic view of a second embodiment of the intermediate plug having two input sides located at right angles to each other.
FIG. 5 is a detailed view of the intermediate plug of FIG.
6 is an electrical equivalent circuit diagram of the intermediate plug of FIG. 4;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Magnet 2 1st plug 3 Connection cable 4 Intermediate plug 5 Input side 6 Other input side 7 Additional input side 8 Intermediate plug output side 9 Screw 10 Connection terminal point 11 Connection terminal point 12 Safety switch 13 One pole 14 The other pole 15 Transzorb-diode 16 Ground connection terminal point

Claims (5)

A safety circuit for the electrical operation member having an additional switching function when the control of the electrical operating member, the electrical operating member, the electrical operating member that is configured as a magnet for hydraulic control and adjustment system In the safety circuit against
A control signal for the electrical operating member (1) has a further separable plug connector between the first separable plug connector (2) and the electrical operating member inside one casing. The safety switch (12) can be inserted into the control circuit of the electrical operating member (1) via the second separable plug connector. As it is, and
On the first detachable plug connector (2), an additional intermediate plug (4, 17) having two input sides (5, 6) can be fitted and fitted,
Here, a first detachable plug connector (2) for a control signal is inserted into the first input side (5) of the additional intermediate plug (4, 17). The second input side (6) of (4, 17) is plugged with a second detachable plug connector for the safety switch (12), against which said additional intermediate plug (4, 17). The output side (8) of the second lead to the electrical operating member (1), whereby the additional intermediate plug (4, 17) has plug connectors (5, 6, 8) on three sides respectively. A safety circuit characterized by being configured as follows.   The second input side (6) of the additional intermediate plug (4, 17) with respect to the safety switch (12) is perpendicular to the plug connector (8) reaching the electrical operating member (1). The safety circuit according to claim 1, wherein the safety circuit is bent. 3. The safety circuit according to claim 1, wherein the control signal is guided through a safety switch (12) provided in series in the control circuit.   The additional intermediate plug (4; 17) is characterized in that the poles (13, 14) of the control line to which the electrical operating member (1) can be connected are protected by the Transzorb diode (15). The safety circuit according to any one of claims 1 to 3.   The safety circuit according to any one of claims 1 to 4, wherein the electrical operation member is a magnet for a hydraulic control and adjustment system in a vehicle.

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