JP2001515257A - 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

DETAILED DESCRIPTION OF THE INVENTION

TECHNICAL FIELD [0001] The present invention relates to a safety circuit for controlling an electric operating member according to a general concept of a main claim.

For example, so-called Zweihand; two-hand safety circuits for the control of operating elements or electric machines are known from the following publications, in which a separate emergency emergency shut-off switch is used to supply the electric machines. Current circuit can be interrupted at any time.

“AEG-Hilfsbuch 1, Grundlagen der Ele
ktrotechnik, Elitera Verlag Berlin 1
972, pages 417, 418 "Advantages of the invention In the safety circuit of the type described at the outset, the advantages which can be achieved in particular according to the characterizing features of claim 1 are, in a simple manner, Plug connectors (for example, according to the DIN standard) can be expanded in electrical equipment as follows:
The control signal for one operating member can be extended so that it can be guided between the first detachable plug connector and the operating member via a safety switch which can be connected externally inside one casing. The safety circuit can therefore advantageously be realized in the control circuit of the operating member 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, fittable on the first plug connector, and possibly a single Can be fastened with only one central screw, so that one input forms a first plug connector for the control signal and the other input forms a second plug connector for the safety switch It is doing. Such subsequent installation and mounting of the circuit is possible in a simple manner without any intervention or change in the mechanical configuration of the device or the control or regulating circuit. Thus, complicated cable, clamping or brazing operations to devices which are often relatively inaccessible are eliminated.

Here, the control signal is guided in a manner known per se via a safety switch provided in series, and in order to avoid faulty voltage peaks due to the safety circuit switching process, a Transsorb-diode is used. Can be connected, and this Tra
The nszorb-diode bridges the poles of the control line.

[0006] Advantageous embodiments are set out in the subclaims.

Drawings An embodiment of a safety circuit of the present invention will be described with reference to the drawings.

FIG. 1 is a perspective view of a magnet as an electric operating member having an additional plug connector for a safety switch.

FIG. 2 is a detailed view of an additional plug with two inputs and one plug for the safety switch.

FIG. 3 is an electrical equivalent circuit diagram.

FIG. 4 is a schematic view of a second embodiment of the intermediate plug further having two input sides or input side-terminal portions located at right angles to each other.

FIG. 5 is a detailed view of the intermediate plug of FIG.

FIG. 6 is an electrical equivalent circuit diagram of the intermediate plug of FIG.

FIG. 1 shows a magnet 1 as an electrical operating member for a hydraulic system, said operating member being connected with a first plug 2 via a connecting cable 3 for actuation of the operating member. A control signal is supplied. According to the invention, the plugs 2 are not connected directly to the mutual coupling connection at the casing of the magnet 1, but are connected via an intermediate plug 4.

The intermediate plug 4 has an input 5 for the control line and another input 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 an additional plug 7. The output side 8 of the intermediate plug 4 is fitted and fitted directly on the magnet 1 and is attached thereto via screws 9. The screw 9 is shown in the plan view of FIG. Inside the intermediate plug 4, the required electrical connections are made by crimping or brazing. Here, the further details shown are not important to the invention.

FIG. 3 shows an electrical equivalent diagram of the safety circuit of the present invention. 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 conductively switched using the safety switch 12 or can be separated and cut off. Therefore, 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 the respective application case.

A protection between the one pole 13 of the connection terminal of the magnet 1 to the output 8 and the other pole 14 as a protection against faulty voltage peaks during the switching process.
A b-diode 15 is provided. The connection terminal point 16 forms a ground connection terminal.

In a second embodiment of FIG. 4, a variant of the embodiment of FIG. 1 shows an intermediate plug 17 having input sides 5, 6 arranged at right angles to one another. The plug 7 to which the safety switch 12 is connected is inserted in the longitudinal direction of the magnet 1.

FIG. 5 shows an intermediate plug 17 with input sides 5, 6 arranged at right angles to one another in FIG.
FIG. Here, reference can be made to the description of FIG.

The equivalent circuit diagram of FIG. 6 shows different geometrical orientations of the input sides 5 and 6 compared to the equivalent circuit diagram of FIG. 3, and the equivalent circuit diagram has the same function.

[Brief description of the drawings]

FIG. 1 is a perspective view of a magnet as an electric operating member having an additional plug connector for a safety switch.

FIG. 2 shows a detailed view of an additional plug with 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 an intermediate plug having two input sides which are furthermore positioned at right angles to each other.

FIG. 5 is a detailed view of the intermediate plug of FIG. 4;

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 Transsorb-diode 16 Ground connection terminal point

[Procedural Amendment] Submission of translation of Article 34 Amendment of the Patent Cooperation Treaty

[Submission Date] March 1, 2000 (200.3.1)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claims

[Correction method] Change

[Correction contents]

[Claims]

Claims (6)

[Claims] In a safety circuit having an additional switching function when controlling an electric operating member, a control signal for the operating member (1) is connected between a first detachable plug connector (2) and the operating member. The safety switch (12) is actuated via a second plug connector between the safety switch (12) via a further plug connector in the interior of one casing between: A safety circuit which is guided so as to be insertable into a control circuit of the member (1). 2. On the first plug connector (2) there are two input sides (5, 5).
An additional intermediate plug (4, 17) with 6) can be fitted and fitted, where one input side (5) forms a first plug connector for control signals and the other plug side. 2. The safety circuit according to claim 1, wherein the input side (6) forms a second plug connector for the safety switch (12). 3. The safety switch according to claim 2, wherein the second input to the safety switch is bent at right angles to the plug connector reaching the operating member. Item 2. The safety circuit according to Item 2. 4. A control signal according to claim 1, wherein the control signal is guided via a safety switch provided in series in the control current circuit. A safety circuit according to any one of the preceding claims. 5. An operating member (1) there at an additional intermediate plug (4; 17).
The poles (13, 14) of the control line to which can be connected are Transsorb-diodes (
The safety circuit according to any one of claims 2 to 4, wherein the safety circuit is protected by (15). 6. The safety circuit according to claim 1, wherein the operating member is a magnet for a hydraulic control and adjustment system in the vehicle.