Telescopic extension with quick-release fasteners

Abstract

Telescopic extension (1) - with a stationary inner rail (2) and at least one outer rail (3) which is slidably mounted relative to the stationary inner rail (2) between an insertion end position and an extension end position in an insertion direction (E) and in the opposite extension direction (A), and - with a front quick-release fastener (11) and a rear quick-release fastener (12) which are fixed at a distance from each other on the inner rail (2) of the telescopic extension, - wherein the quick-fastening elements (11, 12) are designed for detachable mounting of the telescopic extension (1) on a side grid (4), which at least comprising a front vertical grid bar (5), a rear vertical grid bar (6) spaced apart from the front vertical grid bar (5) and arranged substantially parallel to it, and at least one horizontal grid bar (7) extending substantially perpendicular to and connecting the vertical grid bars (5, 6), wherein the horizontal grid bar (7) has at a front end an angled front end section (9) which is connected to the front vertical grid bar (5), extends out of the plane spanned by the two vertical grid bars (5, 6) and angles into a horizontal section (8) of the horizontal grid bar (7) which extends to the rear vertical grid bar (6), and wherein the horizontal grid bar (7) is attached at a rear end opposite the front end i) has an angled rear end section (9) which is connected to the rear vertical grid bar (6), extends out of the plane spanned by the two vertical grid bars (5, 6) and transitions at an angle into the horizontal section (8) of the horizontal grid bar (7), or ii) is directly connected to the rear vertical grid bar (6), wherein the rear quick-fastening element (12) has a support bracket (26), a first mounting section (27) and a second mounting section (29) offset in the insertion direction (E) relative to the first mounting section (27), - wherein the first system section (27) is designed for engagement with a rear vertical grid bar (6) in the insertion direction (E) and has a surface facing in the insertion direction (E) for support on a surface facing in the extension direction (A) of a rear vertical grid bar (6) when the telescopic rail (1) is mounted on a side grid (4), - wherein the second system section (27) is designed for engagement with a rear vertical grid bar (6') in the insertion direction (E) and has a surface facing in the insertion direction (E) for support against a surface facing in the extension direction (A) of a rear vertical grid bar (6') when the telescopic rail (1) is mounted on a side grid (4), and - wherein the support bracket (26) connects the first plant section (27) and the second plant section (29) in a straight or angled manner.

Description

[0001] The present invention relates to a telescopic extension with a stationary inner rail and at least one outer rail slidably mounted relative to the stationary inner rail between an insertion end position and an extension end position in an insertion direction and in the opposite extension direction, and with a front quick-release element and a rear quick-release element, which are fixed at a distance from each other on the inner rail of the telescopic extension. The quick-release elements are designed for detachable mounting of the telescopic extension to a side rack, e.g., a side rack for an oven muffle.

[0002] The invention further comprises the combination of a telescopic extension with a front quick-release fastener and a rear quick-release fastener and a side grille.

[0003] Standard ovens have features on opposite inner walls of the oven cavity for inserting and holding rack supports (baking trays, oven racks, drip trays, etc.) at various heights within the cavity. These features can take the form of projections or groove-shaped recesses in the inner walls. More commonly, however, side racks with horizontal bars are mounted on opposite inner walls for inserting and holding the rack supports.

[0004] Typically, such side racks have at least two vertically and essentially parallel bars when assembled, as well as several horizontal bars arranged at different heights within the oven cavity. These horizontal bars are attached to and connect the vertical bars. To allow a food carrier to be inserted with its lateral edges past the front vertical bars of the opposite side racks (those closer to the oven cavity opening) and onto the horizontal bars, the horizontal bars typically extend at a distance in front of the plane formed by the vertical bars, at least in the area of ​​the side racks facing the oven cavity opening. For connection to and attachment to at least the front vertical bars, the horizontal bars have an angled end section at their front end.At the opposite rear end, which extends towards the area of ​​the side grilles facing the muffle wall, the horizontal grilles may also have an angled end section for connection to and attachment to the rear vertical grilles. Alternatively, the horizontal grilles may be directly connected to the rear vertical grilles at the rear end without an angled end section. In this case, the rear vertical grilles of the opposing side grilles are usually spaced slightly closer together than the front vertical grilles to ensure that the sections of the horizontal grilles extending from the front to the rear vertical grilles are essentially parallel and thus provide sufficient support for food carriers from the front to the rear of the side grilles.

[0005] To prevent a cooking tray from tipping over and falling when, for example, it is pulled out of the oven cavity to process or inspect the food, such that it would tip over at the front end of the horizontal grid bars, such side racks often have another horizontal grid bar at a small distance above a horizontal grid bar as described above. This second horizontal grid bar is wide enough to allow the cooking tray to be inserted between the two horizontal grid bars, but also narrow enough to allow the cooking tray to brace itself against the upper horizontal grid bar with a rear section of its side edge to prevent it from tipping over.

[0006] Modern, high-end ovens are additionally equipped with telescopic runners for holding and moving the oven racks. Besides the smooth movement of the racks, another advantage of using telescopic runners is that, with a sufficient number of movable rail sections, they allow the racks to be pulled out far or even completely from the oven cavity without tipping over. These telescopic runners are typically attached to existing side racks in the oven cavity. A stable yet easily removable and re-attachable mounting is practical and desirable to allow for easy removal and reinstallation of the runners for cleaning, changing their position within the cavity, or even for cleaning the oven itself, for example, through pyrolysis.Various systems are known for the detachable attachment of telescopic extensions to side rails, in which at least one, often two or more fastening elements are provided for mounting the so-called stationary rail element of the telescopic extension to the side rail.

[0007] Fasteners designed for quick and easy, preferably tool-free, mounting and dismounting of a telescopic extension on a side railing often have the disadvantage that, under certain load conditions or other circumstances, the telescopic extension can unintentionally detach from the side railing and fall off. Fasteners intended to prevent this, on the other hand, often have the disadvantage of including safety devices that make mounting and dismounting the telescopic extension complicated and sometimes even require special tools.

[0008] EP 2 592 968 A1 describes a connecting device for the detachable attachment of a telescopic extension to a side rack of an oven, comprising two holders fixed at a distance from each other on a stationary rail element of the telescopic extension. The first holder is designed for attaching the telescopic extension in the front area of ​​the side rack, facing the muffle opening, and includes a spring element by means of which the holder can be locked onto the side rack. The second holder is designed for attaching the telescopic extension in the rear area of ​​a side rack, facing the rear wall of the muffle, in which the horizontal rack bar does not have an angled rear end section at its rear end, but is directly connected in a straight line or welded laterally to the rear vertical rack bar.If the telescopic extension is to be detachably attached to a side rail where the horizontal rail has a different design at its rear end, featuring an angled rear section, a correspondingly different second bracket must be used. However, a simple replacement is impossible or at least very complex, as the brackets are welded or glued to the telescopic extension. Therefore, different telescopic extensions would have to be manufactured for each type of side rail.

[0009] Further connecting devices for the detachable fastening of a telescopic extension to a side grille are disclosed in EP 3 838 067 A1 and DE 10 2010 043 532 A1.

[0010] The object of the present invention was therefore to provide a telescopic extension with fastening elements which eliminate the aforementioned disadvantages of the prior art and which allow quick and easy assembly and disassembly on a side railing, while still effectively preventing unintentional loosening or lifting of the telescopic extension from the side railing.

[0011] This problem is solved by a telescopic extension according to the attached independent claim 1. Embodiments and further configurations are described in the dependent subclaims.

[0012] The telescopic extension according to the invention has a stationary inner rail and at least one outer rail which is slidably mounted relative to the stationary inner rail between an insertion end position and an extension end position in an insertion direction and in the opposite extension direction.

[0013] In this application, the term "inner rail" refers, regardless of its design, to the stationary rail element that is not movable relative to a side rail when the telescopic extension is mounted to it using the quick-release fasteners. In contrast, the term "outer rail" refers to the rail element that is linearly movable relative to the inner rail and onto which an insert, e.g., a cooking tray, is placed or to which an insert is connected.

[0014] In one embodiment of the invention, the telescopic extension is a partial extension comprising only the stationary inner rail and the outer rail, which is linearly movable from it, as rail elements. In an alternative embodiment, the telescopic extension is a full extension with at least three rail elements, namely the inner rail, the outer rail, and one or more intermediate rails arranged between them, wherein a first intermediate rail is linearly movable from the stationary inner rail, and the outer rail is linearly movable from the first intermediate rail or, if more than one intermediate rail is provided, from the outermost intermediate rail.

[0015] The insertion end position refers to the fully inserted position of the outer rail relative to the inner rail. The extension end position refers to the fully extended position of the outer rail relative to the inner rail.

[0016] In one embodiment of the invention, the rail elements are slidably mounted to one another by means of rolling elements, preferably balls or rollers. In a further embodiment, at least the inner rail and the outer rail have a C-shaped profile in cross-section with a rail back formed by the web of the C-profile and with rolling element running surfaces formed on the flanges of the C-profile.

[0017] The telescopic extension according to the invention has a front quick-release element and a rear quick-release element, which are fixed at a distance from each other on the inner rail of the telescopic extension and are designed for detachable mounting of the telescopic extension on a side rail.

[0018] The terms "front quick-release fastener" and "rear quick-release fastener" are used to distinguish between the two fasteners, referring to them as the first and second fasteners. The front quick-release fastener is the one positioned further along the inner rail in the extension direction of the telescopic slide than the rear quick-release fastener. Therefore, when the telescopic slide is installed, the front quick-release fastener is closer to the opening of the oven cavity, while the rear quick-release fastener is closer to the back wall of the oven cavity.

[0019] For placing a cooking tray, two telescopic extensions can be connected opposite each other to side racks located opposite each other in the oven cavity. The side rack itself is not part of the telescopic extension with quick-release fasteners claimed according to the invention. The description of essential structural features of a side rack, also in independent claim 1, serves to define features of the quick-release fasteners, since these are suitable and designed according to the invention for the detachable mounting of the telescopic extension to such a side rack.

[0020] Such a side grille has at least one front vertical grille bar, a rear vertical grille bar spaced apart from the front vertical grille bar and arranged substantially parallel to it, and at least one horizontal grille bar extending substantially perpendicular to and connecting the vertical grille bars.

[0021] The horizontal grid bar has an angled front end section at a front end, which is connected to the front vertical grid bar, extends out of the plane spanned by the two vertical grid bars and angles into a horizontal section of the horizontal grid bar, which extends to the rear vertical grid bar.

[0022] Furthermore, at a rear end opposite the front end, the horizontal grid bar either i) has an angled rear end section in the same or a similar way as at the front end, which is connected to the rear vertical grid bar, extends out of the plane spanned by the two vertical grid bars and angles into the horizontal section of the horizontal grid bar, or ii) it is directly connected to the rear vertical grid bar, i.e. without an angled end section.

[0023] The rear quick-release fastener of the telescopic extension according to the invention is suitable for attachment to both types of side railings with or without an angled end section of the horizontal railing bar, without requiring a change of the rear quick-release fastener or even the manufacture of different telescopic extensions with different rear quick-release fasteners.

[0024] It is understood that the side grille can have, and usually does have, several horizontal grille bars of the type described herein at different heights one above the other for the mounting of one or more telescopic extensions at different heights within the oven muffle.

[0025] According to the present invention, the telescopic extension has a rear quick-release fastening element comprising a support bracket, a first contact section and a second contact section arranged offset in the insertion direction (E) relative to the first contact section, wherein - the first section of the system is designed for engagement with a rear vertical grid bar in the insertion direction (E) and has a surface facing in the insertion direction (E) for support on a surface facing in the extension direction (A) of a rear vertical grid bar when the telescopic rail is mounted on a side grid, - the second system section is designed for engagement with a rear vertical grid bar in the insertion direction (E) and has a surface facing in the insertion direction (E) for support on a surface facing in the extension direction (A) of a rear vertical grid bar when the telescopic rail is mounted on a side grid, and - the support bracket connects the first plant section and the second plant section straight or at an angle.

[0026] A rear quick-release fastener designed in this way has the advantage that it is suitable for detachable mounting of the telescopic extension on various commercially available side panels, namely those in which, at its rear end, the horizontal panel bar has either i) an angled rear end section, similar to or in a similar way to the front end, which is connected to the rear vertical panel bar, extends out of the plane spanned by the two vertical panel bars and transitions at an angle into the horizontal section of the horizontal panel bar, and those in which the horizontal panel bar is ii) directly connected to the rear vertical panel bar at its rear end, i.e. without an angled end section.It is understood that the rear quick-fastening element according to the invention is also suitable for a further variant of side grilles in which two rear vertical grille bars are arranged in the rear area as described herein, and the horizontal grille bar has an angled rear end section at its rear end, which is connected to a first of the two rear vertical grille bars in the manner described in i), and in which the horizontal section of the horizontal grille bar is connected to the second of the two rear vertical grille bars in front of the angled section, for example by abutting it laterally and being welded to it. The following description refers to side grilles of variants i) and ii), in which the horizontal grille bar is connected to only one rear vertical grille bar.

[0027] In side grilles where the horizontal grille bar has an angled rear end section for connection with the rear vertical grille bar, the vertical grille bar is generally positioned closer to the side wall than in side grilles where the horizontal grille bar is directly connected in a linear connection or directly welded laterally to the rear vertical grille bar, in order to ensure that the horizontal section of the horizontal grille bar runs straight from front to back, i.e., substantially parallel to the horizontal section of the horizontal grille bar of the second side grille located on the opposite muff wall.The rear quick-release fastener of the aforementioned type according to the invention is thus suitable for secure attachment to both types of side railings with different positions of the vertical bars, and it would also be suitable for side railings with two rear vertical bars at the two described positions. This rear quick-release fastener according to the invention allows for cost savings and flexibility in application, since it is not necessary to equip telescopic extensions according to the invention with different rear quick-release fasteners for the two different types of side railings, both of which are or could be commercially available.

[0028] In one embodiment of this rear quick-fastening element according to the invention, the support bracket has a cutout, or both the support bracket and the second mounting section have a cutout which is designed and arranged for the insertion of a horizontal grid bar of a side grid when the telescopic rail is mounted on the side grid.

[0029] Such a cutout is advantageous or even necessary for securing the rear quick-release fastener to a side grille where the horizontal grille bar is directly connected to the rear vertical grille bar at its rear end, i.e., without an angled end section. In such a side grille, the first mounting section is aligned with the vertical grille bar, while the second mounting section is positioned closer to the side wall of the grille and therefore must be guided past the horizontal grille bar for mounting the rear quick-release fastener. The necessary clearance at the support bracket is provided by the cutout. In the installed state, the horizontal grille bar extends through the cutout, and the support bracket rests on the section of the horizontal grille bar that passes through the cutout.

[0030] In one embodiment of the aforementioned rear quick-release fastener according to the invention, the support bracket has a fixing section for connecting the rear quick-release fastener to the stationary inner rail. Similar to the fixing section of the holder and the support section of the anti-lift device on the front quick-release fastener, the fixing section of the rear quick-release fastener is preferably a flat section on the rear quick-release fastener oriented parallel to the back of the inner rail, which preferably extends from the support bracket and rests against the back of the inner rail and is welded or bonded to it.

[0031] In one embodiment of the aforementioned rear quick-fastening element according to the invention, the first contact section and / or the second contact section has a U-shaped cross-section for gripping a rear vertical grid bar from a side facing the extension direction (A) and from both sides perpendicular thereto. When mounting the telescopic extension to the side grid, the contact section with the U-shaped cross-section is slid over the vertical grid bar in the insertion direction until it rests against the bar in the insertion direction and grips it with the U-shaped legs, thus preventing further movement both in the insertion direction and perpendicular to it.

[0032] In an alternative embodiment of the aforementioned rear quick-fastening element according to the invention, the first contact section and / or the second contact section has an L-shaped cross-section for gripping a rear vertical grid bar from a side facing the extension direction (A) and from a side perpendicular thereto. When mounting the telescopic extension to the side grid, the contact section with the L-shaped cross-section is pushed against the vertical grid bar in the insertion direction until the base of the L-shaped profile rests against it in the insertion direction and the further leg of the L is positioned laterally to the vertical grid bar, thus preventing further movement both in the insertion direction and transversely in the direction of the further leg of the L.An L-shaped profile of the system section may be sufficient for a secure fixing of the rear quick-fastening element, especially if movement in the other transverse direction, which is not prevented by the profile of the L-leg, is blocked by another component in the assembled state.

[0033] Advantageously, the support bracket of the rear quick-release fastener according to the invention has a bearing surface for placing and supporting the rear quick-release fastener on a horizontal grid bar. In one embodiment, this bearing surface can be a horizontally straight lower edge of the support bracket. In an alternative embodiment, the support bracket has a vertically downward-opening recess with a bearing surface for supporting the rear quick-release fastener on a horizontal grid bar and with lateral edges extending from the bearing surface for gripping the horizontal grid bar. When installing the rear quick-release fastener, the support bracket with the recess is guided over the horizontal grid bar and then lowered until the upper inner edge of the recess rests on the horizontal grid bar.The lateral edges of the recess can then block lateral movement in the assembled state. This embodiment is suitable, for example, in combination with a first support section with an L-shaped cross-section, as described above.

[0034] As a front quick-release fastener for the telescopic extension according to the invention, a quick-release fastener can generally be used which is suitable for detachably fixing the telescopic extension in the front section of the side panel. Depending on the design of the side panel, different quick-release fasteners may be suitable. Advantageously, the front quick-release fastener is designed such that, like the rear quick-release fastener according to the invention, it engages securely with the telescopic extension when it is moved in the insertion direction during installation in the front area of ​​the side panel.

[0035] In a preferred embodiment of the invention, the front quick-fastening element comprises a holder and an anti-lift device. In one embodiment, the holder and the anti-lift device are designed as separate components. Alternatively, the holder and the anti-lift device are permanently connected or connectable to each other, or they are formed in one piece.

[0036] The holder of this preferred front quick-release fastener has a hook with a receiving area and a hook jaw, wherein an angled front end section at the front end of the horizontal section of the horizontal grid bar of a side grid can be inserted into the receiving area of ​​the hook through the hook jaw. Advantageously, the hook jaw is accessible from the insertion direction for insertion of the angled front end section on the horizontal grid bar when mounting the telescopic extension to a side grid by sliding the hook over the angled front end section in the insertion direction.

[0037] Furthermore, the holder of this preferred front quick-release fastener has a retaining section designed for contact with or engagement of the front vertical bar of a side grille, which has at least one contact surface facing in the insertion direction (E) for contact with a surface facing in the extension direction (A) of the front vertical bar of a side grille. When the telescopic extension is mounted on a side grille, the retaining section is brought into contact with or engagement of the front vertical bar when the hook is pushed in the insertion direction over the angled front end section of the horizontal bar. If the retaining section is designed to engage the vertical bar, it prevents lateral movement of the holder away from the side grille towards the interior of the muffle when the telescopic extension is mounted.

[0038] The holder of this preferred front quick-release fastener further comprises a fastening section for connecting the holder to the stationary inner rail. In one embodiment, the fastening section is a flat section of the holder aligned parallel to the back of the inner rail, which rests against the back of the inner rail and is welded or bonded to it.

[0039] The anti-lift device of this preferred front quick-release fastener has a support section, a hook-jaw locking section, and a spring section.

[0040] In one embodiment of the preferred front quick-release fastener, the support section of the anti-lift device is fixedly or detachably connected to the stationary inner rail. Similar to the mounting section of the holder, the support section of the anti-lift device is preferably a flat section of the anti-lift device aligned parallel to the back of the inner rail, which rests against the back of the inner rail and is welded or bonded to it. In an alternative embodiment, the support section of the anti-lift device is fixedly connected to the holder or formed integrally with the holder.

[0041] The hook-jaw locking section of the lifting-out device is connected to the support section via the spring section and can be moved from a locking position in the extension direction (A) to an unlocking position against a restoring force of the spring section, so that the hook jaw with the hook-jaw locking section has a first opening width in the unlocking position and with the hook-jaw locking section has a second opening width determined by the hook-jaw locking section in the locking position, which is smaller than the first opening width.

[0042] To mount the telescopic extension to a side rail, the extension is positioned so that the hook of the front bracket is located in front of the angled front end of the horizontal rail. Then, in a single movement in the insertion direction, the hook is pushed over the angled front end, i.e., the angled front end is inserted through the hook opening. The opening of the hook opening is enlarged or released by retracting the hook locking section in the extension direction against the spring force of the spring section. Alternatively, the hook locking section can be pushed in the extension direction against the spring force of the spring section by the force applied when pushing the telescopic extension, without manually retracting the hook locking section.However, the reverse disassembly process requires manually retracting the hook-jaw locking section, preventing the telescopic extension from unintentionally detaching or lifting from the side grille. Inserting the angled front end section through the hook jaw brings the retaining section of the front bracket into contact with, or engagement with, the front vertical grille bar. The front part of the telescopic extension is then lowered using the front quick-release fastener, so that the bracket's hook rests on and engages with the angled front end section.

[0043] The rear quick-release fastener according to the invention is designed such that it also engages securely with the front quick-release fastener in the rear area of ​​the side grille during the insertion direction of the telescopic extension during assembly. Compared to known rear quick-release fasteners, it has the advantage of being usable simultaneously for two types of commercially available side grilles: those in which the horizontal grille bar has an angled rear end section at its rear end, similar to or in a similar way to the front end, which is connected to the rear vertical grille bar, extends out of the plane spanned by the two vertical grille bars, and transitions at an angle into the horizontal section of the horizontal grille bar; and those in which the horizontal grille bar is directly connected to the rear vertical grille bar at its rear end.without an angled end section.

[0044] The telescopic extension according to the invention allows for quick and easy assembly and disassembly on a side railing and yet effectively prevents unintentional loosening or lifting of the telescopic extension from the side railing.

[0045] In the preferred front quick-release fastener, the hook-jaw locking section is moved from the locked position to an unlocked position by actuating it against the spring force of the spring section. This increases the opening width of the hook jaw, allowing the hook to be lifted from the angled front end section of the horizontal grille bar. Simultaneously, actuating the hook-jaw locking section against the spring force of the spring section is ergonomic and simple. The spring section is accessible from the front of the telescopic extension or the side grille. The movement of the hook-jaw locking section occurs in the extension direction and not in a sideways movement perpendicular to the extension direction, therefore no additional space needs to be reserved for its movement. This also allows for the installation of an ergonomic and easily accessible operating lever.Furthermore, the solution according to the invention also allows for the provision of an additional cover to shield the telescopic extension towards the interior of the oven cavity, in order to protect the telescopic extension from contamination without impairing the accessibility and operability of the front holder. Moreover, the present invention allows for a simpler spring geometry than, for example, the front fastening element known from EP 2 592 968 A1.

[0046] In one embodiment of the preferred front quick-release fastener of the invention, the anti-lift device on the hook-jaw locking section and / or on the spring section has a bending protection extending from the hook-jaw locking section and / or the spring section, which is arranged and designed to limit and / or prevent movement of the hook-jaw locking section in a direction away from the hook of the holder and perpendicular to the extension direction (A) of the telescopic extension and / or to limit and / or prevent movement of the spring section in the insertion direction (E) of the telescopic extension 1. Preferably, the bending protection is designed as a tab, a ridge, or an embossing extending from the hook-jaw locking section and / or the spring section.

[0047] When the telescopic extension is mounted on a side railing and the hook of the holder is positioned above the angled end section of the horizontal railing bar, the hook-jaw locking section serves to limit the lifting of the telescopic extension and to prevent the hook from disengaging from the angled end section of the horizontal railing bar by ensuring that the angled end section engages with the hook-jaw locking section. If a very large force is applied when lifting the telescopic extension, there is a risk that the stability of the spring section and / or the attached hook-jaw locking section will not be sufficient to prevent the hook from disengaging, for example, if the forces involved are large enough to unintentionally bend the spring section and / or the hook-jaw locking section.The bending protection advantageously limits or prevents such undesired bending by being designed to extend from the hook-jaw locking section and / or the spring section and to bear with a free end against a contact surface of the inner rail, the holder, or the anti-lift device itself, or to be arranged at a distance therefrom, wherein the contact surface of the inner rail, the holder, or the anti-lift device forms a stop to limit the movement of the hook-jaw locking section in a direction away from the hook of the holder and perpendicular to the extension direction (A) of the telescopic extension. Preferably, the contact surface is a vertically upward-facing surface of the inner rail or the mounting section of the holder or the support section of the anti-lift device.In a preferred embodiment, the bending protection extends downwards from the hook-jaw locking section vertically or at an acute angle of preferably 1° to 20° relative to the vertical.

[0048] Preferably, according to the invention, the opening of the hook jaw on the front holder is oriented in the insertion direction (E) for the insertion of an angled front end section at the front end of the horizontal section of the side grille into the receiving area of ​​the hook. The hook jaw locking section expediently extends from the spring section in the insertion direction (E). In the withdrawal direction (A), the hook jaw locking section is fixed to the spring section.

[0049] In a further embodiment of the preferred front quick-fastening element, the spring section is designed as a spring-elastic sheet or a spring-elastic tab, the plane or surface of which is arranged perpendicular to the extension direction (A) and preferably parallel to the front vertical grid bar.

[0050] In one embodiment of the preferred front quick-release fastener, the spring section is arranged such that it is in an unpreloaded rest position when the hook-jaw locking section is in a locked position, and it is spring-loaded with a restoring force in the extension direction (A) when the hook-jaw locking section is in an unlocked position. Alternatively, the spring section can also have a preload in the insertion direction (E) in the locked position if its restoring movement before reaching an unpreloaded rest position in the insertion direction (E) is limited by a stop, e.g., by contact with the retaining section of the holder, which rests against or engages the front vertical grid bar, or by the bending protection described above.

[0051] In a further embodiment of the preferred front quick-release fastener of the invention, an actuating tab extending in the extension direction or at an acute angle to the extension direction is provided on the spring section, on the hook-jaw locking section, or on a bending safety element extending from the hook-jaw locking section or the spring section to the inner rail. This actuating tab allows an operator to move the hook-jaw locking section from a locked position to an unlocked position. Preferably, the actuating tab is formed integrally with and extending from the spring section as a section extending obliquely upwards from the upper end of the spring section in the extension direction, preferably at an angle of approximately 40° to 70° to the vertical.The actuating tab allows for simple and ergonomic operation to move the hook-jaw locking section against the spring force of the spring section in the extension direction from a locking position to an unlocking position.

[0052] Advantageously, one surface of the mounting section of the holder extends substantially parallel and perpendicular to the extension direction (A). In one embodiment, the surface of the mounting section also extends parallel to the back of the inner rail and is fixed to it, preferably by welding or bonding. Alternatively, the surface of the mounting section can also be arranged perpendicular or at an angle to the back of the inner rail, for example, for fixing it to the inner rail from below.

[0053] In a further embodiment of the preferred front quick-release fastener of the invention, the holder has a stabilizing section extending at an angle, preferably at a substantially perpendicular angle, from the fastening section and / or a further surface of the holder extending substantially parallel and perpendicular to the extension direction (A) and parallel to the back of the inner rail. The angled stabilizing section counteracts twisting of the holder and stabilizes it.

[0054] In a first aspect, the present invention relates to a telescopic extension of the type described herein, comprising a front quick-release fastener and a rear quick-release fastener. The side grille as such is not the subject of the present invention according to this first aspect.

[0055] In a second aspect, the present invention relates to the combination of a telescopic extension of the type described herein with a front quick-release element and a rear quick-release element and a side grille, which also exhibits the essential structural features described herein.

[0056] Further advantages, features, and applications of the present invention will become clear with reference to the following description of embodiments thereof and the accompanying figures. In the figures, identical elements are designated by the same reference numerals. FIGURES Fig. Figure 1 is an isometric view of an embodiment of a telescopic extension according to the invention, mounted on a first type of side railing. The side railing without the telescopic extension mounted on it is also shown in the figure. Fig. Figure 2 is an isometric representation of the embodiment of the telescopic extension according to the invention. Fig. 1 mounted on a second type of side railing. The side railing without the telescopic extension mounted on it is also shown in the figure. Fig. Figure 3 is an enlarged isometric view of the embodiment of the telescopic extension according to the invention. Fig. 1 in the area of ​​the front quick-release fastener. Fig. Figure 4 is an enlarged isometric view of the embodiment of the telescopic extension according to the invention. Fig. 1 in the area of ​​the front quick-release fastener, where for illustrative purposes only the anti-lift device of the front quick-release fastener is shown and the holder is hidden. Fig. Figure 5 is an isometric representation of the embodiment of the telescopic extension according to the invention. Fig. 1 mounted on a second type of side grille, as it is in Fig. Figure 2 shows the inner rail of the telescopic extension for illustrative purposes only, and other rail elements are hidden. Fig. Figure 6 is an enlarged isometric view of the embodiment of the telescopic extension according to the invention. Fig. 5 in the area of ​​the front quick-release fastener. Fig. Figure 7 is a representation of the embodiment of the telescopic extension according to the invention. Fig. 1 with a vertical view from above in the area of ​​the front quick-release fastener. Fig. Figure 8 is an isometric representation of the front quick-release fastener of the embodiment according to Fig. 1 looking at the side of the quick-release fastener facing the inner rail. Fig. 9 is a side view of the front quick-fastening element of the embodiment according to Fig. 1 looking at the side of the quick-release fastener facing the inner rail. Fig. 10 is an isometric representation of the front quick-release fastener of the embodiment according to Fig. 1 looking at the side of the quick-release fastener facing away from the inner rail. Fig. 11 is a side view of the front quick-fastening element of the embodiment according to Fig. 1 looking at the side of the quick-release fastener facing away from the inner rail. Fig. Figure 12 shows the anti-lift device of the front quick-release fastener of the embodiment according to Fig. 1 in a vertical view from above (left illustration) and in an isometric view (right illustration). Fig. Figure 13 shows the rear quick-fastening element of the embodiment according to Fig. 1 in an isometric view (top illustration) and in a vertical view from above (bottom illustration). Fig. Figure 14 shows various enlarged isometric views of the rear quick-release fastener of the embodiment according to Fig. 1 mounted on a first type of side grid (right upper and right lower representation) and on a second type of side grid (left upper and left lower representation). Fig. Figure 15 shows an alternative embodiment of the rear quick-fastening element in an isometric view (top illustration) and in a vertical view from above (bottom illustration). Fig. Figure 16 shows various enlarged isometric views of the rear quick-release fastener of the embodiment according to Fig. 15 mounted on a first type of side grid (right upper and right lower representation) and on a second type of side grid (left upper and left lower representation).

[0057] The Fig. Figures 1 to 7 show illustrations from different perspectives and partly in enlarged view of an embodiment of a telescopic extension 1 according to the invention mounted on a side rack 4 of an oven, wherein the side racks 4 are in the Fig. 1 and Fig. 2 each differently designed in the rear area and in the lower illustrations of the Fig. 1 and Fig. 2 are shown additionally without the attached telescopic extension 1.

[0058] Both variants of the in the Fig. 1 and Fig. The two types of side grilles shown have a front vertical grille bar 5, a rear vertical grille bar 6 or 6' spaced apart from and substantially parallel to the front vertical grille bar 5, and at least one horizontal grille bar 7 extending substantially perpendicular to and connecting the vertical grille bars 5 and 6 or 6'. The horizontal grille bar 7 has a horizontal section 8 and, at its front end, an angled front end section 9, which is connected to the front vertical grille bar 5, extends out of the plane spanned by the two vertical grille bars 5 and 6 or 6' towards the interior of the open muff, and transitions at an angle into the horizontal section 8 of the horizontal grille bar 7, which extends to the rear vertical grille bar 6 or 6'.

[0059] In the Fig. In the first variant of a side grid shown in Figure 1, the horizontal grid bar 7 has at its rear end, as at its front end, an angled rear end section 9, which is connected to the rear vertical grid bar 6', extends out of the plane spanned by the two vertical grid bars 5 and 6' and angles into the horizontal section 8 of the horizontal grid bar 7.

[0060] In the Fig. In the second variant of a side grille shown in Figure 2, the horizontal section 8 of the horizontal grille bar 7 extends straight to the rear vertical grille bar 6 and is directly connected to the rear vertical grille bar 6 at its rear end by the grille bars 6 and 7 lying against each other laterally and being welded together.

[0061] The telescopic extension 1 comprises a stationary inner rail 2 and an outer rail 3 which is slidably mounted relative to the stationary inner rail 2 between an insertion end position and an extension end position in an insertion direction E and in the opposite extension direction A. In the illustrations of the Fig. In sections 1 to 4, an additional cover is arranged above the outer rail 3, which protects the telescopic extension from contamination from the oven's cooking chamber. In the illustrated embodiment, the inner rail 2 and the outer rail 3 are slidably mounted to one another via a linear ball bearing. The rail elements 2 and 3 have a substantially C-shaped cross-sectional profile, with the raceways for the balls of the ball bearing arranged on the flanges of the C-profiles.

[0062] The telescopic extension 1 comprises a front quick-release fastener 11 and a rear quick-release fastener 12, which are welded to the back of the inner rail 2 of the telescopic extension 1 at a distance from each other. The telescopic extension is detachably mounted to the side rail by means of the quick-release fasteners 11 and 12.

[0063] The Fig. Figures 8 to 11 show illustrations of the front quick-release fastener 11 from different viewing angles and Fig. Figure 12 shows illustrations of the lifting safety device 14 of the front quick-fastening element 11 alone.

[0064] The front quick-release fastener 8 comprises a holder 13 and an anti-lift device 14, which in the illustrated embodiment are designed as separate components. The holder 13 is welded to the back of the inner rail 2 via a fastening section 19, and the anti-lift device 14 is welded to the back of the inner rail 2 via a support section 20.

[0065] The holder 13 has a hook 15 with a receiving area 16 and a hook jaw 17. During the assembly of the telescopic extension 1, the angled front end section 9 at the front end of the horizontal section 8 of the side grille 4 is inserted through the hook jaw 17 into the receiving area 16 of the hook 17 by moving the telescopic extension 1 in the insertion direction E, and the hook 15 is lowered until it rests on the angled end section 9.

[0066] Furthermore, the holder 13 has a retaining section 18 designed to grip the front vertical bar 5 of the side grille 4. In this embodiment, the retaining section 18 has a U-shaped profile in cross-section and a contact surface on the inside of the U-profile, facing in the insertion direction E, for contact with a surface of the front vertical bar 5 facing in the extension direction A. When the telescopic extension is mounted on the side grille, the retaining section 18 engages with the front vertical bar 5 when the hook 13 is pushed in the insertion direction over the angled front end section 9 of the horizontal bar 7. By gripping the vertical bar 5, the U-shaped retaining section 18, when the telescopic extension 1 is mounted, prevents the holder 13 from moving laterally away from the side grille towards the interior of the muffle.Furthermore, the holder 13 has a stabilizing section 25 on its underside which extends at an essentially vertical angle and gives the holder bending stability.

[0067] In this embodiment, the lifting safety device 14, designed as a separate component, has a support section 20, a hook jaw locking section 21, a spring section 22 and a bending safety device 24 extending at an angle from the hook jaw locking section 21 to a contact surface on the inner rail 2.

[0068] The hook-jaw locking section 21 is connected to the support section 20 via the spring section 22 and can be moved from a locking position in the extension direction A to an unlocking position against a restoring force of the spring section 22, so that the hook jaw 17 with the hook-jaw locking section 21 has a first opening width in the unlocking position and with the hook-jaw locking section 21 has a second opening width determined by the hook-jaw locking section 21 in the locking position, which is smaller than the first opening width.

[0069] The spring section 22 is designed as a spring-elastic sheet metal plate whose plane or surface is arranged perpendicular to the extension direction A and substantially parallel to the front vertical grid bar 5. An actuating tab 23 extends from the upper end of the spring section 22 at an angle to the extension direction, allowing an operator to actuate the hook-jaw locking section 21 from a locked position to an unlocked position. The spring section is shown here in an untensioned rest position with the hook-jaw locking section 21 in the locked position.

[0070] The in the Fig. 1, Fig. 2 and Fig. The rear quick-fastening element 12 shown in Figure 5 of a first embodiment is in Fig. 13 shown alone in an isometric view as well as in a vertical view from above. Fig. Figure 14 shows various enlarged isometric views of this rear quick-fastening element 12 mounted on the two different types of side grilles 4 as they are shown in the Fig. 1 and 2 are shown. Fig. 15 and Fig. Figure 16 shows an alternative embodiment of the rear quick-fastening element 12 in illustrations similar to those in the Fig. 13 and Fig. 14.

[0071] The rear quick-release fastener 12 has a support bracket 26, a first mounting section 27, and a second mounting section 29 offset in the insertion direction E relative to the first mounting section 27. The first mounting section 27 and the second mounting section 29 have a U-shaped cross-section for gripping a rear vertical grid bar 6 or 6' from a side of the vertical grid bar 6 or 6' facing in the extension direction (A) and from both sides perpendicular thereto.

[0072] The support bracket 26 connects the first plant section 27 and the second plant section 29 and has two sections arranged at essentially perpendicular angles to each other, at the respective free ends of which the plant sections 27 and 29 are arranged.

[0073] In the Fig. 13 and Fig. In the first embodiment of the rear quick-fastening element 12 shown in Figure 14, the support bracket 26 and the second mounting section 29 have a cutout 28 which is designed and arranged for the insertion of a horizontal grid bar 7 of the side grid 4 when the telescopic rail 1 is mounted on the side grid 4. In the Fig. 15 and Fig. In the second embodiment of the rear quick-fastening element 12 shown in Figure 16, only the support bracket 26 has a cutout 28, since in this embodiment the second mounting section 29 is shorter in the vertical direction than in the first embodiment. In the mounted state of the telescopic extension 1 on a side railing 4 of the first variant, where the horizontal section 8 of the horizontal railing bar 7 extends directly to the rear vertical railing bar 6, as shown in Figure 16, the following applies: Fig. As shown in Figure 2, the horizontal grid bar 7 extends through the cutout 28 and the support bracket 26 rests on the section of the horizontal grid bar 7 extending through the cutout 28.

[0074] In both of the in the Fig.In the embodiments of the rear quick-fastening element 12 shown in Figures 13 to 16, the support bracket 26 has a fixing section 30 welded to the back of the stationary inner rail 2 for connecting the rear quick-fastening element 12 to the stationary inner rail 2.

[0075] For the purposes of the original disclosure, it is pointed out that all features as they can be deduced by a person skilled in the art from the present description, the drawings, and the claims, even if they are specifically described only in connection with certain other features, can be combined individually or in any combination with other features or groups of features disclosed herein, unless this has been expressly excluded or technical circumstances render such combinations impossible or pointless. A comprehensive, explicit description of all conceivable combinations of features is omitted here solely for the sake of brevity and readability.

[0076] While the invention has been illustrated and described in detail in the drawings and the preceding description, this illustration and description are merely exemplary and are not intended to limit the scope of protection as defined by the claims. The invention is not limited to the disclosed embodiments.

[0077] Variations of the disclosed embodiments are obvious to a person skilled in the art from the drawings, the description, and the accompanying claims. In the claims, the word "have" does not exclude other elements or steps, and the indefinite article "a" or "an" does not exclude multiple features. The mere fact that certain features are claimed in different claims does not preclude their combination. Reference numerals in the claims are not intended to limit the scope of protection. Reference symbol list 1 telescopic extension 2 stationary inner rails 3 outer rail 4 side rails 5 front vertical grid bar 6 rear vertical grid bar 6' rear vertical grid bar 7 Horizontal grid bar 8 Horizontal section 9 front end section of the horizontal grid bar 10 rear end section of the horizontal grid bar 11 front quick-release fastener 12 rear quick-release fastener 13 holders 14 Lifting protection 15 hooks 16 Recording area 17 Hook mouth 18 Stop section 19 Fastening section 20 Support section 21 Hook jaw safety section 22 Spring section 23 Actuating tab 24 Bending protection 25 Stabilization section 26 support brackets 27 first section of the support angle 28 Excerpt 29 second section of the support angle 30. Determination section E Insertion direction A Extraction direction

Claims

[1] Telescopic extension (1) - with a stationary inner rail (2) and at least one outer rail (3) which is slidably mounted relative to the stationary inner rail (2) between an insertion end position and an extension end position in an insertion direction (E) and in the opposite extension direction (A), and - with a front quick-release fastener (11) and a rear quick-release fastener (12) which are fixed at a distance from each other on the inner rail (2) of the telescopic extension, - wherein the quick-fastening elements (11, 12) are designed for detachable mounting of the telescopic extension (1) on a side grid (4), which at least comprising a front vertical grid bar (5), a rear vertical grid bar (6) spaced apart from the front vertical grid bar (5) and arranged substantially parallel to it, and at least one horizontal grid bar (7) extending substantially perpendicular to and connecting the vertical grid bars (5, 6), wherein the horizontal grid bar (7) has at a front end an angled front end section (9) which is connected to the front vertical grid bar (5), extends out of the plane spanned by the two vertical grid bars (5, 6) and angles into a horizontal section (8) of the horizontal grid bar (7) which extends to the rear vertical grid bar (6), and wherein the horizontal grid bar (7) is attached at a rear end opposite the front end i) has an angled rear end section (9) which is connected to the rear vertical grid bar (6), extends out of the plane spanned by the two vertical grid bars (5, 6) and transitions at an angle into the horizontal section (8) of the horizontal grid bar (7), or ii) is directly connected to the rear vertical grid bar (6), wherein the rear quick-fastening element (12) has a support bracket (26), a first mounting section (27) and a second mounting section (29) offset in the insertion direction (E) relative to the first mounting section (27), - wherein the first system section (27) is designed for engagement with a rear vertical grid bar (6) in the insertion direction (E) and has a surface facing in the insertion direction (E) for support on a surface facing in the extension direction (A) of a rear vertical grid bar (6) when the telescopic rail (1) is mounted on a side grid (4), - wherein the second system section (27) is designed for engagement with a rear vertical grid bar (6') in the insertion direction (E) and has a surface facing in the insertion direction (E) for support against a surface facing in the extension direction (A) of a rear vertical grid bar (6') when the telescopic rail (1) is mounted on a side grid (4), and - wherein the support bracket (26) connects the first plant section (27) and the second plant section (29) in a straight or angled manner. [2] Telescopic extension (1) according to claim 1, - wherein the support bracket (26) has a cutout (28) or the support bracket (26) and the second attachment section (29) have a cutout (28) which is designed and arranged for the insertion of a horizontal grid bar (7) of a side grid (4) when the telescopic rail (1) is mounted on the side grid (4). [3] Telescopic extension (1) according to one of the preceding claims, - wherein the support bracket (26) has a fixing section (30) for a connection of the rear quick-fastening element (12) to the stationary inner rail (2). [4] Telescopic extension (1) according to any one of the preceding claims, - wherein the first system section (27) and / or the second system section (29) have a U-shaped cross-section for gripping a rear vertical grid bar from a side pointing in the extension direction (A) and from the two sides perpendicular thereto, or - wherein the first system section (27) and / or the second system section (29) have an L-shaped cross-section for gripping a rear vertical grid bar from a side pointing in the extension direction (A) and from a side perpendicular thereto. [5] Telescopic extension (1) according to any one of the preceding claims, - wherein the support bracket (26) has a bearing surface for placing and supporting the rear quick-fastening element (12) on a horizontal grid bar (7) or - wherein the support bracket (26) has a recess with a bearing surface for supporting the rear quick-fastening element (12) on a horizontal grid bar (7) and with lateral edges extending from the bearing surface for gripping the horizontal grid bar (7). [6] Telescopic extension (1) according to any one of the preceding claims, - wherein the front quick-fastening element (8) comprises a holder (13) and an anti-lift device (14), which are designed as separate components or are permanently connected or connectable to each other or are formed in one piece, - wherein the holder (13) - has a hook (15) with a receiving area (16) and a hook mouth (17), wherein an angled front end section (9) at the front end of the horizontal section (8) of a side grid (4) can be inserted into the receiving area (16) of the hook (17) through the hook mouth (17), - a retaining section (18) designed for attachment to the front vertical grid bar (5) or for gripping the front vertical grid bar (5) of a side grid (4), which has at least one contact surface pointing in the insertion direction (E) for attachment to a surface pointing in the extension direction (A) of the front vertical grid bar (5) of a side grid (4), and - has a fastening section (19) for connecting the holder (13) to the stationary inner rail (2), and - wherein the lifting safety device (14) comprises a support section (20), a hook jaw safety section (21) and a spring section (22), - wherein the support section (20) is fixedly or detachably connected to the stationary inner rail (2) or is fixedly connected to the holder (13) or is formed integrally with the holder (13), - wherein the hook jaw locking section (21) is connected to the support section (20) via the spring section (22) and can be moved from a locking position in the extension direction (A) to an unlocking position against a restoring force of the spring section (22), so that the hook jaw (17) with the hook jaw locking section (21) has a first opening width in the unlocking position and with the hook jaw locking section (21) has a second opening width determined by the hook jaw locking section (21) in the locking position, which is smaller than the first opening width. [7] Telescopic extension (1) according to the preceding claim, - wherein the lifting safety device (14) on the hook-jaw locking section (21) and / or on the spring section (22) further comprises a bending safety device (24) extending from the hook-jaw locking section (21) and / or the spring section (22), which is arranged and designed to limit and / or prevent movement of the hook-jaw locking section (21) in a direction away from the hook (15) and perpendicular to the insertion direction (E) of the telescopic extension (1) and / or to limit and / or prevent movement of the spring section (22) in the insertion direction (E) of the telescopic extension (1), wherein the bending safety device (24) is preferably designed as a tab, a web or an embossing extending from the hook-jaw locking section (21) and / or the spring section (22). [8] Telescopic extension (1) according to one of claims 6 or 7, wherein - the holder (13) and the lifting safety device (14) are each manufactured as separate components in one piece from bent sheet metal, wherein the holder (13) is attached to the inner rail (2) via the fastening section (19), preferably welded on, and wherein the lifting safety device (14) is attached to the inner rail (2) via the support section (20), preferably welded on. [9] Telescopic extension (1) according to any one of claims 6 to 8, - wherein the opening of the hook mouth (17) of the hook (15) is oriented in the insertion direction (E) for the insertion of an angled front end section (9) at the front end of the horizontal section (8) of a side grid (4) into the receiving area (16) of the hook (17) and / or - wherein the hook-jaw locking section (21) extends from the spring section (22) in the insertion direction (E). [10] Telescopic extension (1) according to any one of claims 6 to 9, - wherein the spring section (22) is designed as a spring-elastic sheet or a spring-elastic tab, the plane or surface of which is arranged perpendicular to the extension direction (A) and preferably parallel to the front vertical grid bar, - wherein preferably the spring section (22) is arranged such that it is in a non-preloaded rest position when the hook jaw locking section (21) is in a locking position, and it is spring-preloaded with a restoring force in the pull-out direction (A) when the hook jaw locking section (21) is in an unlocking position. [11] Telescopic extension (1) according to any one of claims 6 to 10, - wherein an actuating tab (23) extending in the direction of extension or at an acute angle to the direction of extension is provided on the spring section (22), on the hook jaw locking section (21) or on a bending safety device (24) extending from the hook jaw locking section (21) or the spring section (22) to the inner rail (2) for actuation by an operator to move the hook jaw locking section (21) from a locking position to an unlocking position. [12] Telescopic extension (1) according to any one of claims 6 to 11, - wherein a surface of the fastening section (19) of the holder (13) extends substantially parallel and perpendicular to the extension direction (A) and / or - wherein the holder (13) has a stabilizing section (25) extending at least from the fastening section (19), preferably from a surface of the fastening section (19) of the holder (13) extending substantially parallel and perpendicular to the extension direction (A), preferably at a substantially perpendicular angle. [13] Combination of a telescopic extension (1) according to one of the preceding claims and a side grid (4) for an oven muffle, wherein the side grid (4) comprising a front vertical grid bar (5), a rear vertical grid bar (6) spaced apart from the front vertical grid bar (5) and arranged substantially parallel to it, and at least one horizontal grid bar (7) extending substantially perpendicular to and connecting the vertical grid bars (5, 6), wherein the horizontal grid bar (7) has at a front end an angled front end section (9) which is connected to the front vertical grid bar (5), extends out of the plane spanned by the two vertical grid bars (5, 6) and angles into a horizontal section (8) of the horizontal grid bar (7) which extends to the rear vertical grid bar (6), and wherein the horizontal grid bar (7) is attached at a rear end opposite the front end i) has an angled rear end section (9) which is connected to the rear vertical grid bar (6), extends out of the plane spanned by the two vertical grid bars (5, 6) and transitions at an angle into the horizontal section (8) of the horizontal grid bar (7), or ii) is directly connected to the rear vertical grid bar (6), - wherein the front end section (9) of the horizontal grid bar (7) extends through the receiving area (16) of the hook (15) so that the hook (15) rests on the front end section (9) when the telescopic extension (1) is mounted on the side grid (4).

Images