EP2241823A2 - Hob, in particular gas hob - Google Patents

Abstract

The hob has a box-shaped housing part (17) made up of metal sheet. A cover plate (9) covers an opened upper side of the housing part. The cover plate together with a bottom wall (21) and/or side wall (19) of the housing part defines an inner chamber of the hob. Mold sections (43, 47) i.e. mounting domes, are formed in the bottom wall and/or side wall of the housing part for manufacturing functioning elements. A folded edge is formed between the bottom wall and/or side walls of the housing part by sheet folding process along a prepared sheet folding line.

Description

The invention relates to a hob, in particular a gas hob, according to the preamble of claim 1.

Hobs usually have a trough-shaped in the installed position upwardly open housing part, which is formed by deep-drawing of a sheet metal blank. The housing part can be inserted in a section of a kitchen worktop. The top is covered by a glass ceramic plate, a metal plate or the like.

Such a generic cooktop has between the cover plate and the housing part on an interior in which functional elements, such as lines, electrical lines, heating elements or the like are arranged. The hob interior is limited by bottom and side walls of the tub-shaped housing part. Such functional elements are usually mounted by means of additional, separate fasteners within the hob interior, which in total their assembly is associated with high component costs.

The object of the invention is to provide a hob, in particular gas hob, which can be produced in a simple, in particular reduced-component manner.

The object is solved by the features of claim 1. Preferred embodiments of the invention are disclosed in the subclaims.

According to the characterizing part of claim 1, at least one mold section is formed in the bottom wall and / or in the side walls of the housing part of the hob, which can serve in particular for holding functional elements. The mold section is of the same material and manufactured in one piece by deep drawing in the housing part. In combination with the deep-drawing process, in a sheet-metal folding process, at least one fold is formed between the bottom wall and the side walls along a prepared fold line.

The inventive combination of thermoforming process and sheet metal folding complex geometric structures in the housing part of the hob can be made. At the same time, however, the cost of molds can be kept low. For example, undercuts in the housing part can be formed without the use of complex forming tools, such as slides, for this purpose in the deep drawing process.

The above-mentioned fold line can be incorporated before the sheet metal folding at predetermined locations in the sheet metal blank by targeted material weakenings or the like. Preferably, the fold line can be prepared by an areawise pre-embossing, punching or cutting in the sheet metal blank.

The housing part of the hob can be formed trough-shaped with the already mentioned bottom wall and with the raised side walls. The side walls can be parked at right angles in the Blechfaltvorgang of the bottom wall. The bottom wall goes over with an approximately right-angled fold in the side walls.

In addition, the side walls of the housing part can be placed at their free ends in a flange to the outside. With the edge flange thus formed, the housing part can be supported on the opening edge of a section of the kitchen worktop.

The edge flange can preferably be formed in a second sheet folding along a likewise prepared fold line. The folding of the side walls and the folding of the edge flange can take place in any desired sequence.

The side walls folded from the plane of the bottom wall adjoin one another in the corners of the housing part with their abutting areas. For a stable transition, the side walls may be connected at their joints with additional connecting elements. Preferably can be used as connecting elements locking means which are integrally formed on the joint areas. The latching means may be designed such that they automatically latch together during the folding process.

According to one embodiment, the mold section produced in the deep-drawing process can be used as a holder for laying a line, such as a gas line or an electrical Line, be used. The course of the line in the hob is therefore determined by means of the mold section, which is deep drawn in the manufacture of the housing part.

Preferably, the mold section may be groove-shaped in profile. The line can therefore be laid securely within the groove-shaped profile of the mold section. Against this background, it is particularly preferred to form the molding section approximately in the side wall of the housing part as a guide channel which extends over a predetermined line length. Alternatively, the mold section may comprise a series of spaced-apart segments which may also extend along the duct. Individual segments and / or the above-mentioned guide channel also serve as stiffening beads for further stabilization of the box-shaped housing part.

The mold section can provide a structural depth in which the line or the functional element can completely submerge in the mold section. Alternatively, the functional element may only partially be inserted into the mold section and, in some cases, protrude into the hob interior.

For a further securing position of the functional element held by the mold section, a securing element can be assigned to the mold section. In the event that the functional element is a gas line or an electrical line, the securing element can be designed as a pipe clamp, with which the gas line or electrical line is secured to the mold section.

If the mold portion is formed as an elongated guide channel, the securing element can bridge the guide channel at its open side in the transverse direction.

The securing element may be formed with respect to the housing part as a separate component, which can be fastened in particular via a screw connection to the bottom and / or side wall of the hob housing part.

Particularly preferably, the invention in the housing part of a gas hob is applicable. The gas hob usually has a main gas line, of which in the hob interior Divert partial gas lines to the individual gas burners. In each of the partial gas lines, a gas cock may be connected, with which a partial gas flow rate to the gas burners is adjustable. The main gas line may be laid at a predetermined distance from the bottom wall of the housing part and be supported by the mold section.

In this case, it is preferred for further component reduction if the above-mentioned securing element is integrated directly in the gas flow, which sits in a gas-tight position on one of the distribution openings of the main gas line.

As an alternative to the above-mentioned mounting of lines, the molding section can also be designed as a fastening dome, in particular in the bottom wall of the housing part, which protrudes like a cup into the hob interior and can form a bearing for functional elements, for example for the gas burner, on its upper side. Accordingly, especially a gas burner lower part can be screwed to the mounting dome.

Hereinafter, an embodiment of the invention with reference to the accompanying figures will be described.

Fig. 1

in einer perspektivischen Darstellung ein in einer Küchenarbeitsplatte eingebautes Gaskochfeld;

Fig. 2

eine vergrößerte Teilschnittdarstellung entlang der Schnittebene I-I aus der Fig. 1;

Fig. 3

in einer perspektivischen Darstellung das kastenförmige Gehäuseteil des Gaskochfeldes in Alleinstellung;

Fig. 4

in einer Einzelheit einen an der Seitenwand des Gehäuseteils montierten Gashahn;

Fig. 5

in einem zweiten Ausführungsbeispiel zwei Segmente eines Formabschnittes zur Halterung einer Gasleitung;

Fig. 6

einen Blechplatinen-Zuschnitt vor einem Blechfaltvorgang; und

Fig.7

in einer Detailansicht die Rastmittel an Stoßbereichen der Seitenwände des Gehäuseteils.

Show it:

Fig. 1

in a perspective view of a built-in kitchen worktop gas hob;

Fig. 2

an enlarged partial sectional view along the section plane II of the Fig. 1 ;

Fig. 3

in a perspective view of the box-shaped housing part of the gas hob in a unique position;

Fig. 4

in detail a mounted on the side wall of the housing part gas cock;

Fig. 5

in a second embodiment, two segments of a mold section for holding a gas pipe;

Fig. 6

a sheet metal blank before sheet metal folding; and

Figure 7

in a detailed view of the locking means at abutting areas of the side walls of the housing part.

In the Fig. 1 is a gas hob with four schematically indicated gas burners 1, 3, 5, 7 shown, which are guided by a cover plate 9 of the gas hob. The cover plate 9 has at the in the Fig. 1 On the left side of a control panel 11, in each of which a gas control knob is arranged for each of the gas burner. Not shown in the Fig. 1 associated with the gas burners pot carrier for parking Gargutbehältnissen. The gas hob is otherwise used in a known manner in a section of a kitchen worktop 15.

Like from the Fig. 2 shows, the gas hob housing is in two parts with the top cover plate 9 and arranged underneath box-shaped housing part 17 is formed. The cover plate 9 defines together with the side walls 19 and the bottom wall 21 of the housing part a hob interior 23 in which the functional elements of the gas hob are mounted.

Like from the Fig. 2 further shows, in the interior 23 of the gas hob, a main gas line 25 is arranged, which is coupled to the gas supply network. The main gas line 25 is formed as a manifold with distribution openings, not shown, open into the partial gas lines, which are guided to the gas burners 1, 3, 5, 7. Of the partial gas lines is in the Fig. 2 a partial gas line 27 is shown. Immediately at the junction to the manifold 25, a gas valve 29 is connected in the partial gas line 27, with which a gas flow rate to the gas burner 1 is adjustable. The gas cock 29 has an upwardly projecting actuating shaft 31, which is guided through the control panel of the cover plate 9 and is connected to the control knob 13.

The partial gas line 27 leads to a burner lower part 33 of the gas burner 1. The burner lower part 33 is fastened by means of screw connections 35 to the cover plate 9.

In addition, the gas burner lower part protrudes into a gas burner upper part 37 through a mounting opening formed in the cover plate 9.

As in particular from the Fig. 3 shows, the housing part is approximately trough-shaped with the bottom wall 21 and the edge side raised side walls 19 formed. At the upper free ends of the side walls 19 of the housing part 17, a support flange 39 is turned off at right angles to the outside, with which the housing part 17 is supported on the opening edge of the cutout 41 of the kitchen worktop 15.

In the side wall 19 is according to the Fig. 2 formed at about halfway as a mold section a groove-shaped guide channel 43 in profile, which is designed to be open in the direction of the interior 23. The guide channel 43 extends contour adapted to the manifold 25 over substantially the entire edge length of the box-shaped housing part 17, as shown in the Fig. 3 is shown.

Like from the Fig. 2 shows, the guide channel comprises only a portion of the outer contour of the manifold 25. For a positionally secure fixation in the guide channel 43, therefore, the manifold 25 is additionally secure. In the illustrated embodiment, the gas valve 29 is under Zwischenklemmung of the manifold 25 in screw 43 with the side wall 19. In this way, on the one hand pushes the gas valve 29, the manifold 25 in the groove-shaped guide channel 43. On the other hand, the manifold opening of the manifold 25 in gadichter flow communication with an associated Entrance opening of the gas tap 29.

As a further mold section, a fixing dome 47 is formed in the deep-drawing process in the bottom wall 21 of the housing part 17 for each of the gas burners, which protrudes in an approximately frusto-conical shape from the plane of the bottom wall 21 into the interior 23. The flat top 49 of the mounting dome 47 serves as a bearing point on which according to the Fig. 2 the burner lower part 33 is fastened by means of a further screw connection 51. In the Fig. 4 the four fixing domes 47 are shown. The in the Fig. 3 shown bottom wall 21 also has cross-shaped converging stiffening beads 53 which counteract in an operational heating of the housing part 17 of a conditional deformation of the bottom wall.

Opposite to the control panel of the cover plate 9 is provided with respect to the plane of the bottom wall 21 downwardly stepped portion 55 on the housing part 17, which is spaced over a height difference .DELTA.h from the gas valve 29. In the bottom area 55, if necessary, liquid reaching into the interior 23 can collect and drip out of the hob through bottom slots, not shown.

In the Fig. 5 the housing part 17 is shown according to the second embodiment. The housing part 17 is largely identical to the housing part 17 of the first embodiment. Therefore, reference is also made to the description of the first embodiment. In contrast to the first embodiment, the mold portion for holding the manifold 25 is not formed as a continuous guide channel, but has the mold portion a series of segments 57, which are formed in the deep-drawing in the side wall 19. The segments 57 are spaced apart by a distance a and extend in the longitudinal direction of the distributor tube 25. In each of the segments 57 groove-like channel sections are formed in profile, in which the distributor tube 25, not shown here, can be used. At their, the interior 23 facing front sides, the segments 57 adjacent to the channel sections each have screw holes 59 for screwing the gas taps 29 on the side wall 19th

The housing part 17 according to the invention of the gas hob is made in combination both by means of a deep-drawing process as well as by means of two Blechfaltvorgänge. Based on Fig. 6 and 7 are the process steps required for the production of the housing part 17 is explained: So is in the Fig. 6 a blank of a sheet metal blank shown, from which the housing part 17 is formed. The blank has a substantially planar, rectangular base portion, which forms the bottom wall 21 of the housing part 17.

The Indian Fig. 6 As a whole, the sheet-metal blanks shown are still flat, with the exception of the fastening domes 47 formed in the base section and the stiffening beads 53, which have been formed in a preceding deep-drawing process. The edge sides of the base portion are bounded by means of a prepared fold line 61, which is formed in the embodiment shown by a series of slots arranged one behind the other. The slits of the fold line 61 can be formed in a separate cutting process, for example by laser cutting, in the sheet metal blank.

Each of the marginal sides of the base portion is extended beyond the fold line 61 by means of the side walls 19 which are in the Fig. 6 also still in the same level with the base section.

The side walls 19 in turn go over to a second Blechfaltlinie 63 in the respective edge flange 39, which is also still in the same plane with the base portion.

In a subsequent first sheet metal folding operation, first the side walls 19 are folded upwards along the prepared fold line 61, so that the base section or the bottom wall 21 merges into the respective side wall 19 in a substantially rectangular bend 65, as shown in FIG Fig. 7 is shown. Subsequently, in a second sheet-metal folding operation, the edge flange 39 is set off at right angles to the outside along the fold line 63.

As seen from the detail view of Fig. 7 further shows, at the adjacent abutting portions 66 of the side walls 19 each have a latching tongue 67 and a cooperating detent slot 69 is formed. The first sheet-metal folding operation takes place in such a way that, when the individual side walls 19 are folded, the latching means 67, 69 provided on the opposing abutting areas 66 engage automatically with one another in order to provide a stable transition at the corner regions of the side walls 19. <B> LIST OF REFERENCES </ b> 1, 3, 5, 7 gas burner 43 mold section 9 cover 45 screw 11 Control panel 47 The bosses 13 control knobs 49 Top of the 15 Kitchen countertop The bosses 17 housing part 51 screw 19 Side wall 53 reinforcing beads 21 bottom wall 55 graded floor area 23 inner space 57 segments 25 Main gas line 59 screw 27 Partial gas line 61 fold line 29 gas tap 63 fold line 31 actuating shaft 65 fold 33 Gas burner base 66 impact areas 35 screw 67, 69 latching means 37 Gas burner shell a distance 39 edge flange .delta.h height difference 41 Worktop cut

Claims (11)

Hob, in particular gas hob, with a, in particular box-shaped, formed from a sheet metal housing part (17) and one, an open top of the housing part (17) covering the cover plate (9), which together with the bottom and side walls (19, 21) of Housing part (17) defining an interior space (23) of the hob, characterized in that in the bottom wall (21) and / or the side walls of the housing part (17) at least one mold portion (43, 47), in particular for holding functional elements is formed formed by deep drawing, and that at least one fold (65) between the bottom wall (21) and the side walls (19) is formed by a sheet metal folding along a prepared sheet fold line (61). Hob according to claim 1, characterized in that the mold section (43) is a holder for laying a conduit (25), such as a gas line or an electrical line. Hob according to claim 1 or 2, characterized in that the mold section (43) is designed groove-shaped in profile. Hob according to one of the preceding claims, characterized in that the mold section (43) is a guide channel formed in particular in the side wall of the housing part (17). Cooking field according to one of the preceding claims, characterized in that in the case of a gas hob , a gas line (15), in particular main gas line, at a distance (Δh) from the bottom wall (21) of the housing part (17) from the mold section (43) is supported. Cooking field according to one of the preceding claims, characterized in that the shaped portion (47) as a mounting stand, in particular in the bottom wall (21) of the housing part (17) in the hob interior (23) protrudes. Hob according to claim 6, characterized in that the fixing dome (47) is designed as a bearing for the gas burner (1, 3, 5, 7). Hob according to one of the preceding claims, characterized in that the side walls (19) of the housing part (17) have at their free ends an outwardly parked edge flange (39) which is formed by a Blechfaltvorgang along a prepared Blechfaltlinie (63). Hob according to one of the preceding claims, characterized in that the fold line (61, 63) is prepared by an at least partially pre-embossing, punching or cutting. Hob according to one of the preceding claims, characterized in that in the corners of the housing part (17) adjacent abutting portions (66) of the side walls (19) via connecting elements (67, 69) are interconnected. Hob according to claim 10, characterized in that the connecting elements (67, 69) are formed as latching means on the abutting areas (66) of the side walls (19).

Images