WO2021167543A1

WO2021167543A1 - A pan support for gas hob

Info

Publication number: WO2021167543A1
Application number: PCT/TR2020/050117
Authority: WO
Inventors: Cem Burak UNSAL; Mehmet Baris Gocer
Original assignee: Mamur Teknoloji Sistemleri San. A.S.
Priority date: 2020-02-17
Filing date: 2020-02-17
Publication date: 2021-08-26
Also published as: EP4107435A1; EP4107435A4

Abstract

The invention relates to a pan support for a gas hob comprising a metal frame (20) with an inner wall (24) and an upper part (26) adjacent to the inner wall (24); and a support arm (10) made of flat metal, which is secured to the upper part (26) through a base (17) such that extending inwardly at the frame (20). The pan support further comprises an elongated part (15) extending to the frame (20) through the base (17) and a welding seam (40) provided between the elongated part (15) and the frame (20).

Description

A PAN SUPPORT FOR GAS HOB

TECHNICAL FIELD

The invention relates to a pan support disposed on the top plate and surrounding the burner in gas hobs.

BACKGROUND OF THE INVENTION

There is a variety of solutions for connecting the arms on the pan supports designed for gas hobs to the grid. The most preferred applications are fixing the support arm onto the frame by welding and casting. Highly durable pan support devices are produced with the casting method, but the cost of this type of frames is very high compared to other known solutions. Pan supports produced with the use of welding are made of steel or a similar material called flat wire supports. It is cost-efficient compared to known solutions. However, the welding seam is maintained to be long to provide sufficient strength between the frame and the support arm.

EP2241821B1 discloses a production method of a pan support for hobs in which the frame is joined to support arms via resistance welding. It comprises at least one frame in which at least two arms extend over the grid, thus forming a first and a second sequential arm and which has a common intersection area and wherein the arms are set at the same height with respect to the frame According to the method described, the first arm and the second arm proceed from the intersection areas.

SUMMARY OF THE INVENTION

The object of the invention is to increase the structural strength of the metal pan support placed to the top plate of the gas hob.

In order to achieve the aforementioned object, the invention comprises a pan support for a gas hob comprising a metal frame with an inner wall and an upper part adjacent to the inner wall; and a support arm made of flat metal, which is secured to the upper part through a base such that extending inwardly at the frame. The pan support is further comprising an elongated part which is extending to the frame through the base and a welding seam provided between the elongated part and the frame. The part extended to the frame creates a welding surface between the corresponding wall of the pan support and the support arm and increases the moment strength of the support arm by forming a grip surface in the vertical direction. Thus, the necessary structural strength can be provided even with a flat support arm structure against the load that will occur, for example, with a full container of standard weight. The frame is generally a metal profile that is obtained by being bended from four corners and encloses a cooking area that contains burner pairs in groups of two or four. The base part of the frame is arranged to be completely flat or have a legged structure and it seats on the flat top plate of the hob such that it can be easily received by being pulled. In a possible embodiment, the support arm extends over the frame towards the burner center perpendicular to the extension direction of the frame.

In a preferred embodiment of the invention, the elongated part is arranged to be adjacent to the inner wall of the frame. Thus, when a container is seated on the support arm, a welding seam is obtained that directly provides support in opposite direction against the moment formed into the area surrounded by the frame.

In a preferred embodiment of the invention, it comprises a first seam between the support arm and the upper part and a second seam between the elongated part and the inner wall. Two separate seam structures, the mutual first and second welding seam on the upper part and the lateral wall, provide less stress application of the load applied to the support arm and allow the use of flat support arm structure by increasing the weld sea area.

In a preferred embodiment of the invention, the first seam and the second seam are positioned perpendicular to each other. In this case, the force components of a load seating on the support arm from the top increase the strength of the support arm on the frame by resisting the forces in the direction of pull with the first seam from the top and in the direction of compression with the second seam from the bottom. Further, it increases the strength of the support arm on the frame against impacts that will occur when the load is suddenly applied to the support arm.

In a preferred embodiment of the invention, the elongated part is directly fixed to the inner wall by the second seam. This allows a weld to be applied to the elongated part to form the second welding seam without the use of an additional fixator after the support arm is simply placed on the frame. In a preferred embodiment of the invention, the contact area of the second seam is substantially equal to the area of the part of the elongated part facing the inner wall. This prevents the second seam from creating a gap between the inner wall and the elongated part that is difficult to clean.

In a preferred embodiment of the present invention, the support arm comprises a blade part rising from the base. The blade part prevents the deformation of the support arm resulting from the thermal stress by dissipating the heat from the burner surrounded by the frame by means of a wing effect. In a possible embodiment, the support arm is in a blade structure obtained by being cut from metal sheet. In this case, it is formed simply by cutting.

In a preferred embodiment of the invention, a lower edge of the elongated part is arranged to be in a stepped structure parallel to the base. In this case, when placed on the frame in the transverse direction from its base, the elongated part fits to the inner wall such that they will contact and becomes suitable for welding.

In a preferred embodiment of the present invention, the support arm comprises the L-form. Thus, it both has a part extending inwards from the frame and extends to the frame to which it is fixed with its elongated part.

In a preferred embodiment of the invention, the cross section of the frame has a rectangular- like form. A frame can be obtained by bending a metal profile to provide a corner form.

In a preferred embodiment of the invention, the width of the base of the frame is shorter than the height of the inner wall. In this case, a secure chamber is delimited in the upper sheet against circumstances such as overflow by means of a frame forming a raised wall. In a preferred embodiment of the invention, the welding seam has the structure of a spot weld. Thus, it is possible to fix a thin and flat support arm vertically to the frame, providing sufficient strength.

BRIEF DESCRIPTION OF THE DRAWINGS

Figure 1 is a perspective view of a representative embodiment of the invention of the pan support comprising a support leg with the structure of an L-formed blade.

Figure 2 is an enlarged view of a support arm of the pan support shown in Figure 1. Figure 3 is a front view of a representative embodiment of the invention of an L-formed support arm used in the pan support.

DETAILED DESCRIPTION OF THE INVENTION

In this detailed description, the development of the invention has been described without any limitation and only with reference to the examples for a better explanation of the subject.

In Figure 1 , a hob grid is shown alone and in perspective surrounding two gas burner placed in alignment in a longitudinal direction in such a way to delimit a cooking area on a top plate (1) of a gas hob (not shown). The hob grid includes a metal frame (20) in the structure of I- profile and obtained by bending the four corners in a curvilinear manner, and mutual support arms (10) extending vertically inward by being fixed in an upper part (26) of the frame (20) facing the upward. Each of the support arms (10) is obtained by being cut from a flat metal sheet. While each of the support arms (10) facing each other is located on the lower and upper edges of the frame (20), a pair of lower and upper support arms aligned corresponding to each burner is located on the long side edges. The frame (20) is divided in two by a bridge element (30) extending between its mutual side edges. The bridge element (30) comprises a support extension (34) obtained by combining mutually extending support arms (10) and a first leg (32) and a second leg (38) at their ends. A cross arm (36) extends vertically from the center of the bridge element (30) to the mutual support arms (10). The part of the cross arm (36) crossing the bridge element (30) has a plus-like form.

In Figure 2, the pan support is shown in an enlarged view around the support arm (10). The support arm (10) has a wide blade part (11) and a tapered extension (14) that continues vertically from the upper part thereof. The upper edge (12) of the support arm (10), which consists of the blade part (11) and the part of an elongated part (15) facing the upward, extends flat. A distal end (13) extends vertically downward from the upper edge (12). A flat base (17) extends under the blade part (11). On the base (17), a corner (18) forms a downward elongated part (15). The corner between the elongated part (15) and the base (17) is approximately aligned with an inner wall (24) of the corresponding frame (20) and the corner of the upper part (26). In this case, the base (17) is in contact with an outer wall (22) to be supported from its proximal part. The elongated part (15) contacts with the inner wall (24). A welding seam (40) couples the frame (20) to the support arm (10). A first seam (42) of the welding seam (40) is provided at the base (17) below the blade portion (11) in a vertical position. A second seam (44) of the welding seam (40) is provided on the part of the elongated part (15) facing the inner wall (24). The first seam (42) and the second seam (44) are perpendicular to each other.

In Figure 3, the position of the support arm (10) on the frame (20) is shown in front view by taking partial section. When a food container is placed on the pan support, a force is applied to the support arm (10) due to the weight in the direction of a container load (F). Torque is applied in proportion with the corresponding distance of the extension (14) at the points of the welding seam (40) by means of the container load (F). The resulting moment causes a common static tension in both the first seam (42) and the second seam (44). The first seam (42) is in the form of a spot welding between the upper part (26) and the base (17). The moment caused by the container load (F) forces the base (17) to be pulled up from the upper part (26). Therefore, a tensile stress occurs on the first seam (42). On the other hand, due to the moment caused by the container load (F), the second seam (44), which is provided at a corner part (18) so as to be close to the corresponding end of a lower edge (16) of the elongated part (15), is subjected to a compressive stress between itself and the inner wall (24). The second seam 44 is also formed by a spot welding. The first seam (42) and the second seam (44) in the spot welding form can sufficiently compensate the static stresses caused by the container load (F) of the support arm (10) at the corner part (18). In this case, it has become possible to produce a pan support occupying the minimum space on the top plate (1) by means of a thin and flat vertical frame (20) whose height is greater than its width, in other words, a base (28) distance thereof is smaller than the distance of the inner wall (24)

REFERENCE NUMBERS

I Top plate 26 Upper part

10 Support arm 28 Base

I I Blade part 30 Bridge Element

12 Upper Edge 32 First Leg

13 Distal end 34 Support extension

14 Extension 36 Cross Arm

15 Elongated Part 38 Second Leg

16 Lower Edge 40 Welding seam

17 Base 42 First Seam

18 Corner Part 44 Second Seam 20 Frame F Container load

22 Outer wall 24 Inner wall

Claims

1- Pan support for a gas hob comprising a metal frame (20) with an inner wall (24) and an upper part (26) adjacent to the inner wall (24); and a support arm (10) made of flat metal, which is secured to the upper part (26) through a base (17) such that extending inwardly at the frame (20) characterized in that an elongated part (15) is extending to the frame (20) through the base (17) and a welding seam (40) provided between the elongated part (15) and the frame (20).

2- A pan support according to claim 1 , wherein the elongated part (15) is arranged to be adjacent to the inner wall (24) of the frame (20).

3- A pan support according to claim 2, wherein the welding seam (40) comprises a first seam (42) between the support arm (10) and the upper part (26) and a second seam (44) between the elongated part (15) and the inner wall (24).

4- A pan support according to claim 3, wherein the first seam (42) and the second seam (44) are positioned perpendicular to each other.

5- A pan support according to claim 3-4, wherein the elongated part (15) is directly fixed to the inner wall (24) by the second seam (44).

6- A pan support according to claim 5, wherein the contact area of the second seam (44) is substantially equal to the area of the part of the elongated part (15) facing the inner wall (24).

7- A pan support according to any one of the preceding claims, wherein the support arm (10) comprises a blade part (11 ) rising from the base (17).

8- A pan support according to claim 7, wherein the elongated part (15) is arranged to be in a stepped structure with a lower edge (16) parallel to the base (17).

9- A pan support according to any one of the preceding claims, wherein the support arm (10) comprises an L-form.

10- A pan support according to any one of the preceding claims, wherein the cross- section of the frame (20) has a rectangular-like form. 11-A pan support according to claim 10, wherein the width of a base (28) of the frame (20) is shorter than the height of the inner wall (24).

12- A pan support according to any one of the preceding claims, wherein the welding seam has the structure of a spot weld.