JPH0351972B2 - - Google Patents

Abstract

1. Electric hotplate with a hotplate body (12) and a lower cover (24), as well as an insulating piece (51) projecting from the cover for the passage or the electric hotplate connections (58, 81) through said cover, thermally stably insulated, flexible leads (58), which are sufficiently long for arranging the connecting piece (75) thereof outside the area of the electric hotplate (11) lead to a common, freely movably arranged connecting piece (75) and the ends (90) of the flexible leads (58) are constructed for insertion in a connection socket (91, 105), characterized in that the connecting piece (75) has retaining means keeping the ends (90) of flexible leads (58) aligned parallel to one another in the manner of connecting pins or lugs and that the ends (90) project through the connecting piece (75) and out of the latter on the connection side thereof.

Description

Detailed Description of the Invention [Industrial Application Field] The present invention provides an electric heating plate main body of an electric heating plate for cooking, a cover that covers the plate side of the electric heating plate main body, and a plurality of electric heating coils that supply power to the heating coils of the electric heating plate main body. A common common conductor having an insulation penetrating portion in which the connecting conductors pass through the cover and through which these connecting conductors are passed, and in which the thermally insulated flexible connecting conductors are provided so that they can move freely. These flexible connecting conductors lead to the connecting pieces and are sufficiently long to place the connecting pieces outside the range of the cooking plate. Regarding electric heating plates for cooking.

BACKGROUND OF THE INVENTION The provision of insulated flexible connecting conductors for cooking plates, which are usually very long and have individual free ends, is disclosed in US Pat. No. 1,093,754 and British Patent No. 904,672. It is known from the book. These connecting conductors were defective, difficult to assemble and often had to be shortened. Moreover, these connecting conductors were partially short-circuited.

A cooking heating plate with flexible connecting conductors whose ends are connected by a common connecting piece with plug-in or screw connection terminals is disclosed in European Patent Application No.
It is known from specification 0070042. These conductors can be bent back over the center of the heating plate and the connecting pieces can be placed in recesses in the lower cover of the heating plate. For transportation and storage, cooking plates with connecting pieces therefore require less space than those without connecting pieces.

[Problem to be solved by the invention]

The object of the invention is to improve this heating plate, taking into account easier manufacturing and assembly possibilities as well as greater safety during connection.

[Means to solve the problem]

According to the invention to solve this problem, the connecting pieces mechanically couple the flexible connecting conductors to each other near their ends, such as connecting pins or connecting ears at these ends. They are arranged parallel to each other and held in such a way that their ends are introduced into the connection socket.

〔Effect of the invention〕

Thus, according to the invention, the connecting piece mechanically connects a plurality of flexible connecting conductors to each other at their ends and holds these ends arranged parallel to each other like connecting pins or connecting ears. It is therefore no longer necessary to provide special connecting pins or connecting ears, and the end itself can be connected as a connecting pin or connecting ear to the connecting socket by a bayonet connection.

[Embodiment]

In a preferred embodiment, the connecting piece has channels into which the ends of the flexible connecting conductors are introduced and fixed in the channels by their deformation.
For this purpose, a configuration using a core end sleeve is suitable. Preferably, the heating plate can be provided with an insulation penetration that passes through the heating plate cover, which penetration can consist of two parts. Furthermore, it is advantageous for the slightly thickened connection between the flexible connecting conductor and the solid connecting conductor to be positioned axially in the recess in the passage of the penetration part.

If the connection socket is constructed as a connection block with plug connections for all heating plates of the heating device for cooking, a particularly simple and even automatic assembly is possible.
This connecting block can then be connected via a flexible multicore cable to another connecting block, where it can again be connected with a plug connection, where further switches, regulators, etc. can be provided.

〔Example〕

Embodiments of the invention are shown in the drawings and explained in detail below.

1 and 2 show a closed flat top surface 13
This figure shows a cooking electric heating plate 11 having a cast iron electric heating plate main body 12. The heating plate is provided with spiral fins in the annular area to be heated, these fins forming spiral grooves between them, into which heating coils 19 consisting of resistance wires are embedded into the ceramic material 20. ing. A connecting pin 80 is welded to the coil 19 and projects from the ceramic material 20. Penetration part 5 where a connecting conductor 81 as a solid wire is welded to the connecting pin 80 and insulated
Enter passage 57 at 1.

A downwardly directed, substantially cylindrical edge 21 extends around the heating plate body 12, and a flange-shaped edge area of a circular cover 24 of deformed metal sheet is located at the lower edge of the edge 21. There is. The edge area of the cover 24 has an upwardly directed step, which rests on the inside of the edge 21 and thereby centers the cover.

An insulating feedthrough 51 passes through the shroud 24, the step of which is supported inside the shroud and has juxtaposed channels 57 into which flexible connecting conductors 58 are inserted. It sticks out,
These connecting conductors are surrounded by an insulating section 82 having high heat resistance.

The penetrating portion 51 consists of two parts or halves, which are adapted to fit into each other and define a passage 57 between them. An internal notch 101 is formed within each passageway, which notch forms an enlarged portion of the passageway. As shown in FIG. 2, an insulation portion 82 projects into the passage and thereby forms a complete insulation of the connecting conductor 58. A flexible connecting conductor 58 consisting of a stranded wire is connected to a solid connecting conductor 81 by welding the end faces. The connection or welding point 100 is the connection conductor 5
8, 81 and passageway 57. Due to the two-part design of the penetration part 51, the connecting conductors 58, 81 are positioned in the recess 101 and cannot be moved too much in the axial direction. The connecting conductor is prevented from being pressed inwardly or upwardly and coming into contact with the heating plate body 12, resulting in a short circuit. Instead of a welded connection 100, the connection can also be made by means of a caulked or brazed sleeve, in which case the sleeve can have outwardly directed flanges or shoulders, which are axially Fix it.

The two halves of the penetration part 51 can be held in correct alignment with each other at the contact surfaces by projections and notches, which are not shown. These projections and notches are held by introduction into the openings of the cover 24 and held in that position by projections or legs 103, which extend into each half of the penetrating section. The electric heating plate body 12 is integrally formed with the electric heating plate body 12 and is supported on the lower side of the electric heating plate main body 12.
The basic shape of the penetration part is elongated and the penetration part is aligned in the circumferential direction of the heating plate. The piercing portion projects through the cover in the area of the projection.

The flexible plate connecting conductors 58 are mechanically connected to each other at their outer ends by connecting pieces 75 made of ceramic material. By providing the penetration portion 5 in the radial direction approximately in the center of the annular heating area of the heating plate and determining the size of the connecting conductor, the outer edge 9 of the connecting piece
7 can be located at a distance from the outer edge of the heating plate at a distance smaller than the radius of the heating plate and can be adapted to the installation conditions, in which case the juxtaposed connecting conductors act like a flexible tape, and this tape allows easier rocking and greater movement of the connecting piece in the vertical direction, but restricts torsion and lateral movement more strongly.

A recess 61 is present in the cover diametrically opposite the penetration portion 51 and at a suitable distance in the radial direction from the center of the heating plate, and the recess 61 allows the heating plate to be bent without bending the connecting conductor 58 too sharply. The size is chosen to accommodate the protruding portion of the penetration portion 51 when stacked with their backs facing each other and offset by 180°. Since the width of the recess 61 is significantly larger than the width of the penetrating portion,
The connecting conductor 58 can be folded inwards and the connecting piece 75 can be located on the side of the penetration part 51 in the recess 61. However, the connecting piece 75 can also be folded outward and supported approximately in the plane of the heating plate.

Each free end of each flexible connecting conductor 58 has a connecting piece 75
It is introduced into the passage 83 of. The channels 83 are arranged side by side and consist of holes passing through the connecting pieces 75, which are made of electrically insulating material and are in the form of strips arranged at right angles to the conductors 58. and mechanically connect them to each other near the ends, so that the connecting conductors 58 form a band or strip. Each of the holes has a circular cross section and a larger diameter section 8 with a shoulder 86 between them.
4 and a portion 85 of smaller diameter.
Two lateral notches 87 are provided in the front face 97 of the connecting piece 75 at the opening of each hole portion 85 .

Each free end 90 of the connecting conductor has a core end sleeve 8
8, the wire end sleeve consisting of a metal sheet sleeve surrounding the end of the wire. The insulation is covered at the ends by two metal strips 89. The wire end sleeve 88 is manufactured from a sheet metal strip that is first bent into a U-shaped cross section. After introducing the core wire into the U-shaped cross-section, the sheet metal strip is bent into a circular shape (FIG. 4). A strip 89, which is likewise circularly deformed, is pressed tightly around the insulation, which can be placed over as a loose insulation sleeve.

When the wire end sleeve 88 is now introduced into the passageway 83, the strip 89 abuts the shoulder 86 and longitudinally positions the wire end sleeve. The sleeve passes through the narrower portion 85 of the passageway, but the longer portion protrudes from surface 97. After introduction, the final deformation of the conductor end sleeve 88 causes the front surface 9
This is done in the part that protrudes from 7. To this end, the sleeve is pressed into the kidney shape shown in FIG. 5, but this kidney shape is wider and lower in height than the previously described circle (FIG. 4). FIG. 5 shows that the lateral portions of the sleeve 88 are pressed into the notches 87 and these notches secure the conductor end sleeve from slipping out of the passageway and against twisting. It shows. The wire end sleeves thereby form connection pins which can be introduced into the respective connection part and fixed there by screws, bayonet connection springs or the like.

FIG. 2 shows a connection socket 91 made of insulating material, which has an inner chamber and
These inner chambers are accessible from the outside through openings on both sides. Each of these chambers houses a metal cage 92 which houses a C-shaped double spring clamping element, one free end 94 of which is truncated. , the other end 95 is bent inward.

If the wire end sleeve 88 is introduced from one side and the lead-in wire 96 is introduced from the other side, they are both tightened and electrically connected to the bottom of the cage 92 by the spring clamping element. When pressed, this spring clamping element has a sharp end 9
It is prevented from coming off at 4. At the bent end 95, the spring clamping element fits into a groove 98 provided obliquely or at right angles, which groove is machined into the sleeve 88, so that a sufficiently strong connection is achieved. If you want to pull the wire out of the connection socket from both sides, first remove the wire end sleeve 8.
8 is drawn. Therefore, it is impossible for the uninsulated free end of the lead-in wire 96, which is connected to the domestic power supply circuit and is therefore energized, to be exposed.

In the present invention, the free end of the flexible connecting conductor is converted into a double plug, which can be easily connected by means of a connecting socket or an individual spring or screw connection. The plugs or pins are held in the desired orientation exactly parallel to each other and to the planar surface of the sleeve. Connection piece 75
A projection 99 protruding from the outer surface 97 of the connector plug and cooperating with a notch in the connection plug can be provided to prevent twisting of the connection and incorrect interconnection of the conductors. This can also be achieved by various asymmetrical formations or alignments of the wire end sleeve 88 or the connecting piece 75. The invention makes it possible to use automatic equipment, for example industrial robots, to assemble the heating plate, including the electrical connections, into the heating device for cooking. To this end, as a means of preventing twisting of the connection, the connector piece can be provided with protrusions or notches, which are captured or carried by the grips of the industrial robot. It is also possible to use a wire end sleeve in which the part forming the connecting pin does not consist of the wire surrounded by the sleeve, but instead consists of a metal plate lug.

Figure 6 shows the bottom of the electric heating device for cooking.
For example, it is a mounting plate 104 for a range or cooking tray having four electric heating plates 11 as described above. A connecting piece 75 is fitted into a connecting block 105, which has the basic shape of a cross with connecting pieces on its four end faces. These connections can have clamping elements, as described with respect to FIG. Alternatively, the lead wire 96 to the controller of the electric heating plate is the flexible multi-core cable 1
06, and this multi-core cable protrudes from the center of the connecting block 105. At the end of the cable 106 four connection plugs 107 are provided, which can be plugged into a bayonet connection 108 in a common connector block 109, which connects to one side of the heating device for cooking. It is attached to the side and can also hold a regulator for an electric heating device for cooking.
The connecting block 105 is connected to the mounting plate 104 by four
Since it is mounted in the center of the two electric heating plates 11, each of which has a minimum distance from the cooking electric heating plates, the connection to the block 105 can be made by relatively short connecting conductors 58.

The features described in connection with FIG. 6 allow automatic assembly of the heating device for cooking. That is, the connecting block 105 and the connector block 109 are attached to the mounting plate and the prefabricated cable 1
06 to connect each other. Electric heating plate for cooking now 1
1 can be automatically introduced into the opening in the mounting plate 104 from above. Due to the inwardly bent flexible wire 58 of the cooking plate, this can be done without sideways tilting or shifting. Thereafter, the connection is completed by inserting the connecting piece 75 into the terminal block 105. It is particularly advantageous that an insulating cover on the bottom side of the cooking electric heating device can be dispensed with if necessary, since there are no uninsulated parts on the bottom side.

[Brief explanation of drawings]

Fig. 1 is a bottom view of the electric heating plate for cooking and its connection part, Fig. 2 is a partial sectional view of the electric heating plate and its connection part, Fig. 3 is a sectional view taken along - in Fig. 2, and Fig. 4
Figures and Figure 5 are the - and - lines in Figure 3.
FIG. 6 is a partial sectional view taken along a line, and a bottom view with some parts omitted of the electric heating device for cooking having four electric heating plates. 11...Electric heating plate for cooking, 12...Electric heating plate main body,
19... Heating coil, 24... Cover, 51... Insulation penetration part, 58, 81... Connection conductor, 75...
Connection piece, 90... end, 91, 105... connection socket.

Claims (1)

[Scope of Claims] 1. An electric heating plate main body 12 of the electric heating plate 11 for cooking, a cover 24 that covers the lower side of the electric heating plate main body 12, a plurality of connecting conductors 58 that supply power to the heating coil 19 of the electric heating plate main body 12, 81 is provided in the portion that penetrates the cover 24 and has an insulation penetrating portion 51 through which these connection conductors are passed, and the thermally insulated flexible connection conductor 58 is provided so as to be freely movable. In the case where the flexible connecting conductors 58 are sufficiently long to provide the connecting pieces 75 outside the range of the cooking electric heating plate 11, the connecting pieces 75 are connected to the flexible connecting conductors 58. 58 are mechanically coupled to each other near their ends 90 to hold these ends 90 aligned parallel to each other like connecting pins or connecting ears such that these ends 90 connect to the connecting socket 91. . , 105. 2. Electric heating plate for cooking according to claim 1, characterized in that the end 90 is configured in such a way that it can be introduced into the connection socket 91, 105 only in one position. 3. The connecting piece 75 has passages 33 into which the ends 90 of the flexible connecting conductor 58 are introduced,
Due to its deformation, it is fixed, so that the passage 83 in the connecting piece 75 is fixed at the end 90 of the flexible connecting conductor 58.
2. An electric cooking plate as claimed in claim 1, characterized in that it has an inner shoulder (86) near which engages a corresponding shoulder on the end (90). 4. The flexible connecting conductors 58 consist of stranded wires, the ends 90 of these strands being surrounded by wire end sleeves 88, which are introduced into the passages 83 of the connecting piece 75. After being brought into its final shape, the connecting piece 75 has cutouts 87 into which parts of the core end sleeve 88 engage. The electric heating plate for cooking according to item 1 or 3. 5. A connecting socket 91 cooperating with the end 90 of the flexible connecting conductor 58 has a spring clamping element 93 which captures and holds the end 90 and the lead-in line 96 from the electrical circuit;
The electric heating plate for cooking according to claim 2, which acts as a retainer for the lead-in wire 96 but does not act as a retainer for the flexible connecting conductor 58. 6. The insulation penetration part 51 is inserted into the opening in the cover 24, and this penetration part forms the passages 57 through which the connection conductors 58, 81 are passed and the axial positioning of the connection conductors 58, 180 in these passages 57. The penetrating portion 51 has a positioning device 101 that performs
2. An electric heating plate according to claim 1, characterized in that it is manufactured from two matching parts, which parts define a passage 57 between them. 7 The positioning device 101 connects the flexible connecting conductor 58
and a connecting conductor 81 to the heating coil 19, and is a notch 101 for accommodating a connecting portion 100 projecting laterally from these connecting conductors 58, 81. The electric heating plate for cooking according to item 6. 8. The electric heating plate for cooking according to claim 6 or 7, characterized in that the insulating portion 82 of the flexible connecting conductor 58 enters into the passage 57 of the penetrating portion 51. 9. Claim characterized in that the connecting socket 105 consists of a connecting block, which is arranged in the electric cooking device and has plug connections for the connecting pieces 75 of a plurality of electric heating plates 11 for cooking. The electric heating plate for cooking according to item 2 or 5. 10 The connecting block 105 is connected via a flexible multi-core cable 106 to a connector block 109, which connector block is fixedly attached to one side of the electric heating device for cooking. The electric heating plate for cooking according to scope item 9.