Telescoping drawer with quick fasteners

Abstract

Telescopic pull-out with a stationary inner rail and at least one outer rail which is displaceably mounted relative to the stationary inner rail and with a front and a rear quick-fastening element which allow quick and easy assembly and disassembly on a side rail and yet effectively prevent unintentional loosening or lifting of the telescopic pull-out from the side rail.

Description

SUBJECT OF THE INVENTION

[0001] The present invention relates to a telescopic pull-out with a stationary inner rail and at least one outer rail mounted displaceably 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. The outer rail comprises a front quick-fastening element and a rear quick-fastening element, which are fixed at a distance from one another on the inner rail of the telescopic pull-out. The quick-fastening elements are designed for detachable mounting of the telescopic pull-out to a side rail, e.g., a side rail for an oven muffle.

[0002] The invention further comprises the combination of a telescopic extension with a front quick-fastening element and a rear quick-fastening element and a side grille. BACKGROUND OF THE INVENTION

[0003] Commercially available ovens have devices on opposite inner walls of the oven muffle for inserting and holding the cooking belt supports (baking trays, baking racks, drip trays, etc.) at various heights within the muffle. Such devices can be projections or groove-shaped recesses formed in the inner walls of the muffle. Often, however, side grids with horizontal grid bars for inserting and holding the cooking belt supports are mounted on the inner walls of the muffle.

[0004] Such side grids usually have at least two grid bars which, when assembled, are arranged vertically and essentially parallel to one another, as well as a plurality of horizontal grid bars arranged at different heights within the muffle, which are fastened to the vertical grid bars and connect them. In order to ensure that a food carrier can be inserted with its lateral edges past at least the front vertical grid bars of the opposite side grids which are arranged closer to the muffle opening and onto the horizontal grid bars, the horizontal grid bars usually extend at least in the front area of ​​the side grids facing the muffle opening at a distance in front of the plane formed by the vertical grid bars. For connection to and fastening to at least the front vertical grid bars, the horizontal grid bars have an angled end section at the front end.At the opposite rear end, which extends in the direction of the area of ​​the side grids facing the rear wall of the muffle, the horizontal grid bars can also have an angled end section for connection to and attachment to the rear vertical grid bars. Alternatively, the horizontal grid bars can also be connected directly to the rear vertical grid bars at the rear end without an angled end section. In this case, the rear vertical grid bars of the oppositely mounted side grids are usually arranged at a slightly smaller distance from one another than the front vertical grid bars in order to ensure that the sections of the horizontal grid bars extending from the front to the rear vertical grid bars run essentially parallel and thus offer sufficient support for food carriers from the front to the rear area of ​​the side grids.

[0005] To prevent a food carrier from tipping over and falling down when, for example, it is pulled out of the oven's muffle so far that it would tip over at the front end of the horizontal grille bars in order to process or inspect the food, such side grilles often have another horizontal grille bar at a short distance above a horizontal grille bar as described above, which is sufficiently wide to insert the food carrier between the two horizontal grille bars, but which is also sufficiently narrow that the food carrier can be supported on the upper horizontal grille bar with a rear section of the side edge to prevent it from tipping over.

[0006] Modern, high-quality ovens are also equipped with telescopic pull-outs for holding and moving the cooking belt carriers. In addition to the smooth movement of the cooking belt carriers, another advantage of using telescopic pull-outs is that, with a sufficient number of movable rail elements, they allow the cooking belt carrier to be pulled far or even completely out of the oven cavity without the food carrier tipping over. Such telescopic pull-outs are usually attached to existing side rails in the oven cavity. A stable, yet easily removable and reinstallable attachment is practical and desirable, allowing the telescopic pull-outs to be easily removed and reinserted for cleaning, changing the position height within the cavity, or even for cleaning the oven itself, for example, through pyrolysis.Various systems are known for the detachable fastening 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 on the side rail.

[0007] Fasteners for quick and easy, preferably tool-free, assembly and disassembly of a telescopic extension on a side rail often have the disadvantage that the telescopic extension can become unintentionally detached from the side rail and fall down under certain load situations or other circumstances. Fasteners designed to prevent this often have the disadvantage of including safety devices that make assembly and disassembly of the telescopic extension complex and sometimes even require special tools.

[0008] EP 2 592 968 describes a connecting device for the releasable fastening of a telescopic pull-out to a side grille of a baking oven, comprising two holders fixed at a distance from one another on a stationary rail element of the telescopic pull-out. The first holder is designed to fasten the telescopic pull-out in the front region of the side grille facing the muffle opening and comprises a spring element by means of which the holder can be latched to the side grille. The second holder is designed to fasten the telescopic pull-out in the rear region of a side grille facing the muffle rear wall, in which the horizontal grille bar does not have an angled rear end section at its rear end, but is connected directly to the rear vertical grille bar in a straight line or by welding to the side.If the telescopic extension is to be detachably attached to a side rail with a different horizontal bar design at its rear end and an angled rear end section, a second bracket with a correspondingly different design must be used. However, a simple replacement is impossible or at least very complex, since the brackets are welded or glued to the telescopic extension. Therefore, different telescopic extensions would have to be manufactured for both types of side rails. OBJECT OF THE INVENTION

[0009] 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 rail and yet effectively prevent unintentional detachment or lifting of the telescopic extension from the side rail. DESCRIPTION OF THE INVENTION

[0010] This object is achieved by a telescopic extension according to the appended independent claim 1. Embodiments and further developments emerge from the dependent subclaims.

[0011] The telescopic extension according to the invention has a stationary inner rail and at least one outer rail which is displaceably 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.

[0012] In this application, the inner rail, regardless of its design, refers to the stationary rail element that is immovable relative to a side rail when the telescopic extension is mounted to it using the quick-release fasteners. In contrast, the outer rail refers to the rail element that is linearly movable relative to the inner rail and onto which a shelf, e.g., a food support, is placed or to which a shelf is connected.

[0013] In one embodiment of the invention, the telescopic extension is a partial extension, comprising only the stationary inner rail and the outer rail mounted thereon for linear movement 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 therebetween, wherein a first intermediate rail is mounted for linear movement on the stationary inner rail and the outer rail is mounted for linear movement on the first intermediate rail or, if more than one intermediate rail is provided, on the outermost intermediate rail.

[0014] The insertion end position refers to the fully retracted 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.

[0015] In one embodiment of the invention, the rail elements are slidably mounted on 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.

[0016] The telescopic extension according to the invention has a front quick-fastening element and a rear quick-fastening element, which are fixed at a distance from one another on the inner rail of the telescopic extension and are designed for a detachable mounting of the telescopic extension on a side rail.

[0017] The terms "front quick-fastening element" and "rear quick-fastening element" are used to linguistically distinguish between the two quick-fastening elements, namely a first and a second quick-fastening element. The "front quick-fastening element" refers to the quick-fastening element that is positioned further along the inner rail in the extension direction of the telescopic extension than the rear quick-fastening element. When the telescopic extension is assembled, the front quick-fastening element is positioned closer to the opening of the furnace muffle, while the rear quick-fastening element is positioned closer to the rear wall of the furnace muffle.

[0018] For placing a food support, two telescopic pull-outs can be connected to opposing side rails in the oven cavity. The side rail as such is not a component of the telescopic pull-out with quick-fastening elements claimed according to the invention. The description of essential structural features of a side rail, also in independent claim 1, serves to define features of the quick-fastening elements, since these are suitable and designed according to the invention for detachable mounting of the telescopic pull-out to such a side rail.

[0019] Such a side grille has at least one front vertical grille bar, a rear vertical grille bar spaced from the front vertical grille bar and arranged substantially parallel thereto, and at least one horizontal grille bar extending substantially perpendicular to the vertical grille bars and connecting them.

[0020] The horizontal lattice bar has at a front end an angled front end section which is connected to the front vertical lattice bar, extends out of the plane spanned by the two vertical lattice bars and, at an angle, merges into a horizontal section of the horizontal lattice bar which extends to the rear vertical lattice bar.

[0021] Furthermore, the horizontal lattice bar has, at a rear end opposite the front end, either i) an angled rear end section in the same way or similarly to the front end, which is connected to the rear vertical lattice bar, extends out of the plane spanned by the two vertical lattice bars and merges at an angle into the horizontal section of the horizontal lattice bar, or ii) it is directly connected to the rear vertical lattice bar, ie without an angled end section.

[0022] The rear quick-fastening element of the telescopic extension according to the invention is suitable for attachment to both types of side rails with or without an angled end section of the horizontal rail, without the need to change the rear quick-fastening element or even to produce different telescopic extensions with different rear quick-fastening elements.

[0023] It is understood that the side grille can have several horizontal grille bars of the type described herein at different heights one above the other and usually also has them for mounting one or more telescopic extensions at different heights within the furnace muffle.

[0024] According to the present invention, the telescopic extension has a rear quick-fastening element which comprises a support angle, 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 contact section is designed for engagement with a rear vertical lattice bar in the insertion direction (E) and has a surface facing in the insertion direction (E) for support on a surface of a rear vertical lattice bar facing in the extension direction (A) when the telescopic rail is mounted on a side rail, the second contact section is designed for engagement with a rear vertical lattice bar in the insertion direction (E) and has a surface facing in the insertion direction (E) for support on a surface of a rear vertical lattice bar facing in the extension direction (A) when the telescopic rail is mounted on a side rail, and the support angle connects the first contact section and the second contact section in a straight or angled manner.

[0025] A rear quick-fastening element designed in this way has the advantage that it is suitable for detachable mounting of the telescopic extension on various commercially available side rails, namely those in which the horizontal railing bar at its rear end either i) has an angled rear end section in the same way or similarly to the front end, which is connected to the rear vertical railing bar, extends out of the plane spanned by the two vertical railing bars and merges at an angle into the horizontal section of the horizontal railing bar, and those in which the horizontal railing bar at its rear end ii) is connected directly to the rear vertical railing bar, ie 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 rails in which two rear vertical rails are arranged in the rear region as described herein and the horizontal rail at its rear end has an angled rear end section which is connected to a first of the two rear vertical rails in the manner described in i) and in which the horizontal section of the horizontal rail in front of the angled section is connected to the second of the two rear vertical rails, for example by laterally abutting it and being welded to it. In the following description, reference is made to side rails of variants i) and ii) in which the horizontal rail is connected to only one rear vertical rail.

[0026] In the case of side gratings in which the horizontal grating bar has an angled rear end section for connection to the rear vertical grating bar, the vertical grating bar is generally arranged closer to the side wall than in the case of side gratings in which the horizontal grating bar is directly connected to the rear vertical grating bar in a linear connection or directly welded laterally to ensure that the horizontal section of the horizontal grating bar runs straight from front to rear, i.e. essentially parallel to the horizontal section of the horizontal grating bar of the second side grating arranged on the opposite muffle wall.The rear quick-fastening element of the aforementioned type according to the invention is thus suitable for secure attachment to both types of side rails with different vertical bar positions, and it would also be suitable for side rails with two rear vertical bars in the two described positions. This rear quick-fastening element according to the invention allows for cost savings and flexibility in use, since it is not necessary to equip telescopic extensions according to the invention with different rear quick-fastening elements for the two different types of side rails, both of which are or may be commercially available.

[0027] In one embodiment of this rear quick-fastening element according to the invention, the support angle has a cutout or both the support angle and the second contact section have a cutout which is designed and arranged for inserting a horizontal grid bar of a side grid when the telescopic rail is mounted on the side grid.

[0028] Such a cutout is advantageous or even necessary for securing the rear quick-fastening element to a side grille in which the horizontal grille bar is connected directly to the rear vertical grille bar at its rear end, i.e. without an angled end section. In such a side grille, the first contact section comes into contact with the vertical grille bar, while the second contact section is arranged closer towards the muffle side wall and must therefore be guided past the horizontal grille bar in order to install the rear quick-fastening element. The free space required for this at the support angle is provided by the cutout. When installed, the horizontal grille bar extends through the cutout and the support angle rests on the section of the horizontal grille bar extending through the cutout.

[0029] In one embodiment of the aforementioned rear quick-fastening element according to the invention, the support bracket has a fixing portion for connecting the rear quick-fastening element to the stationary inner rail. Similar to the fixing portion of the holder and the support portion of the anti-lift device on the front quick-fastening element, the fixing portion of the rear quick-fastening element is preferably a flat portion on the rear quick-fastening element aligned parallel to the rail back of the inner rail, which preferably extends from the support bracket and rests against the rail back of the inner rail and is welded or glued thereto.

[0030] 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 engaging around a rear vertical grid bar from a side facing in the extension direction (A) as well as from the two sides perpendicular thereto. When mounting the telescopic extension to the side grid, the contact section with a U-shaped cross-section is pushed over the vertical grid bar in the insertion direction until it rests against it in the insertion direction and engages it with the U-legs, thus preventing further movement both in the insertion direction and transversely thereto.

[0031] 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 encompassing a rear vertical lattice bar from a side facing in the extension direction (A) and from a side perpendicular thereto. When mounting the telescopic extension on the side rail, the contact section with an L-shaped cross-section is pushed against the vertical lattice bar in the insertion direction until the base of the L-shaped profile rests against it in the insertion direction and the further L-leg is arranged laterally of the vertical lattice bar, thus preventing further movement both in the insertion direction and transversely thereto in the direction of the further L-leg.An L-shaped profile of the contact section may be sufficient for secure fixing of the rear quick-fastening element, especially if a 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.

[0032] The support bracket of the rear quick-fastening element according to the invention expediently has a support surface for placing and supporting the rear quick-fastening element on a horizontal lattice bar. In one embodiment, this support surface can be a horizontally straight lower edge of the support bracket. In an alternative embodiment, the support bracket has a vertically downwardly open recess with a support surface for supporting the rear quick-fastening element on a horizontal lattice bar and with lateral edges extending from the support surface for gripping the horizontal lattice bar. During assembly of the rear quick-fastening element, the support bracket with the recess is guided over the horizontal lattice bar and then lowered until the upper inner edge of the recess rests on the horizontal lattice bar.The lateral edges of the recess can then block any lateral movement when mounted. This embodiment is suitable, for example, in combination with a first contact section with an L-shaped cross-section, as described above.

[0033] As the front quick-fastening element of the telescopic extension according to the invention, a quick-fastening element suitable for releasably securing the telescopic extension in the front section of the side rail can generally be used. Depending on the design of the side rail, different quick-fastening elements may be suitable. The front quick-fastening element is expediently designed such that, like the rear quick-fastening element according to the invention, it securely engages with the side rail upon movement of the telescopic extension in the insertion direction during assembly in the front area of ​​the side rail.

[0034] 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 formed as separate components. Alternatively, the holder and the anti-lift device are permanently connected to one another or connectable, or they are formed as a single piece.

[0035] The holder of this preferred front quick-attachment element has a hook with a receiving area and a hook mouth, 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 mouth. The hook mouth is expediently accessible from the insertion direction for inserting the angled front end section on the horizontal grid bar when mounting the telescopic extension on a side grid by sliding the hook over the angled front end section in the insertion direction.

[0036] Furthermore, the holder of this preferred front quick-fastening element has a holding section designed for engagement with the front vertical grid bar or for encompassing the front vertical grid bar of a side grid, which holding section has at least one contact surface facing in the insertion direction (E) for engagement with a surface of the front vertical grid bar of a side grid facing in the extension direction (A). When the telescopic extension is mounted on a side grid, the holding section is brought into contact with or engagement with the front vertical grid bar when the hook is pushed over the angled front end section of the horizontal grid bar in the insertion direction. If the holding section is designed for encompassing the vertical grid bar, it prevents a lateral movement of the holder away from the side grid in the direction of the muffle interior when the telescopic extension is mounted.

[0037] The holder of this preferred front quick-attachment element further comprises a fastening portion for connecting the holder to the stationary inner rail. In one embodiment, the fastening portion is a flat portion of the holder aligned parallel to the rail back of the inner rail, which portion rests against the rail back of the inner rail and is welded or glued thereto.

[0038] The anti-lift device of this preferred front quick-attachment element has a support section, a hook-and-jaw locking section and a spring section.

[0039] In one embodiment of the preferred front quick-attachment element, the support portion of the anti-lift device is fixedly or detachably connected to the stationary inner rail. Similar to the fastening portion of the holder, the support portion of the anti-lift device is preferably a flat portion of the anti-lift device aligned parallel to the rail back of the inner rail, which rests against the rail back of the inner rail and is welded or glued thereto. In an alternative embodiment, the support portion of the anti-lift device is fixedly connected to the holder or formed integrally with the holder.

[0040] The hook jaw securing section of the anti-lifting device is connected to the support section via the spring section and can be moved from a securing position in the extension direction (A) into a release position against a restoring force of the spring section, so that the hook jaw with the hook jaw securing section has a first opening width in the release position and with the hook jaw securing section in the securing position has a second opening width determined by the hook jaw securing section, which is smaller than the first opening width.

[0041] To mount the telescopic extension on a side rail, the telescopic extension is brought up to the side rail so that the hook of the front holder is positioned in front of the angled front end section of the horizontal rail. The hook is then pushed over the angled front end section in a single movement in the insertion direction, i.e. the angled front end section is inserted through the hook mouth. The opening of the hook mouth is enlarged or opened by pulling back the hook jaw locking section in the extension direction against the spring force of the spring section. Alternatively, the hook jaw locking section can be pushed in the extension direction against the spring force of the spring section by the force applied when sliding the telescopic extension on, without the hook jaw locking section having to be pulled back manually.However, the reverse disassembly process requires manual retraction of the hook-and-jaw locking section, which prevents the telescopic extension from accidentally being released or lifted off the side rail. By inserting the angled front end section through the hook jaw, the retaining section of the front bracket is brought into contact or engagement with the front vertical rail. The front part of the telescopic extension is then lowered with the front quick-release fastener so that the bracket's hook rests on and engages with the angled front end section.

[0042] The rear quick-fastening element according to the invention is designed in such a way that it also securely engages with the side rail when the telescopic extension is moved in the insertion direction during assembly of the front quick-fastening element in the rear area of ​​the side rail. It has the advantage over known rear quick-fastening elements that it can be used simultaneously for two types of commercially available side rails, namely those in which the horizontal rail at the rear end has an angled rear end section, the same or similar to the front end, which is connected to the rear vertical rail, extends out of the plane spanned by the two vertical rails, and merges at an angle into the horizontal section of the horizontal rail, and those in which the horizontal rail at the rear end is directly connected to the rear vertical rail, i.e.without an angled end section.

[0043] The telescopic extension according to the invention allows quick and easy assembly and disassembly on a side rail and nevertheless effectively prevents unintentional loosening or lifting of the telescopic extension from the side rail.

[0044] In the preferred front quick-attachment element, the hook jaw locking section can be moved from the locking position to a release position by actuating it against the spring force of the spring section in order to increase the opening width of the hook jaw so that the hook can be lifted from the angled front end section of the horizontal grid bar. At the same time, 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 grid. The movement of the hook jaw locking section occurs in the extension direction and not in a sideways movement perpendicular to the extension direction, which is why no additional space needs to be kept free for moving the hook jaw locking section. This also allows for the installation of an ergonomic and easily accessible operating lever.Furthermore, the solution according to the invention also allows the provision of an additional cover to shield the telescopic pull-out toward the interior of the oven muffle, thus protecting the telescopic pull-out from contamination without compromising the accessibility and operability of the front holder. Furthermore, the present invention allows for a simpler spring geometry than, for example, the front fastening element known from EP 2 592 968.

[0045] In one embodiment of the preferred front quick-fastening element of the invention, the anti-lifting device on the hook jaw locking section and / or on the spring section has a bending lock 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. The bending lock is preferably designed as a tab, a web, or an embossing extending from the hook jaw locking section and / or the spring section.

[0046] When the telescopic extension is mounted on a side railing and the hook of the holder is positioned over the angled end section of the horizontal railing bar, the hook locking section serves to limit the lifting of the telescopic extension and prevent the hook from being lifted out of engagement with the angled end section of the horizontal railing bar by causing the angled end section to engage the hook locking section. If a very large force is exerted when lifting the telescopic extension, there is a risk that the stability of the spring section and / or the attached hook locking section will be insufficient to prevent the hook from being lifted out, e.g., if the acting forces are large enough to inadvertently bend the spring section and / or the hook locking section.The bending protection device advantageously limits or prevents such undesired bending by being designed such that it extends from the hook jaw locking section and / or the spring section and rests with a free end against a contact surface of the inner rail, the holder or the anti-lifting device itself or is arranged at a distance therefrom, wherein the contact surface of the inner rail, the holder or the anti-lifting device forms a stop for limiting 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 fastening section of the holder or the support section of the anti-lifting device.In a preferred embodiment, the bending protection extends from the hook jaw securing section vertically or at an acute angle of preferably 1° to 20° to the vertical downwards.

[0047] According to the invention, the opening of the hook jaw on the front holder is preferably oriented in the insertion direction (E) for insertion of an angled front end portion at the front end of the horizontal portion of the side rail into the receiving area of ​​the hook. The hook jaw securing portion expediently extends from the spring portion in the insertion direction (E). In the extension direction (A), the hook jaw securing portion is secured to the spring portion.

[0048] 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 lattice bar.

[0049] In one embodiment of the preferred front quick-fastening element, the spring section is arranged such that it is in a non-preloaded rest position when the hook locking section is in a securing position, and it is resiliently preloaded with a restoring force in the extension direction (A) when the hook locking section is in a release position. Alternatively, the spring section can also have a preload in the insertion direction (E) in the securing position if its restoring movement is limited by a stop before reaching a non-preloaded rest position in the insertion direction (E), e.g., by contact with the holding section of the holder, which rests against or engages around the front vertical lattice bar, or via the previously described bending protection.

[0050] In a further embodiment of the preferred front quick-fastening element 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-type locking section, or on a bending lock extending from the hook-type locking section or the spring section to the inner rail. The actuating tab can be actuated by an operator to move the hook-type locking section from a securing position to a releasing position. Preferably, the actuating tab is formed as a section extending from the upper end of the spring section in the extension direction obliquely upwards, preferably at an angle of approximately 40° to 70° relative to the vertical, integrally with and extending from the spring section.The actuating tab allows for simple and ergonomic actuation to move the hook jaw locking section against the spring force of the spring section in the extension direction from a locking position to a release position.

[0051] A surface of the fastening section of the holder expediently extends substantially parallel and perpendicular to the extension direction (A). In one embodiment, the surface of the fastening section also extends parallel to the back of the inner rail and is secured thereto, preferably by welding or gluing. Alternatively, the surface of the fastening section can also be arranged perpendicular or obliquely to the back of the inner rail, for example, for securing it to the inner rail from below.

[0052] In a further embodiment of the preferred front quick-fastening element of the invention, the holder has a stabilizing section that extends at an angle, preferably at a substantially perpendicular angle, from the fastening section and / or another surface of the holder that extends substantially parallel and perpendicular to the extension direction (A) and parallel to the rail back of the inner rail. The angled stabilizing section counteracts twisting of the holder and stabilizes it.

[0053] In a first aspect, the present invention relates to a telescopic extension of the type described herein, comprising a front quick-release fastening element and a rear quick-release fastening element. The side rail as such is not the subject of the present invention according to this first aspect.

[0054] In a second aspect, the present invention relates to the combination of a telescopic extension of the type described herein with a front quick-fastening element and a rear quick-fastening element and a side rail, which has the essential structural features also described herein.

[0055] Further advantages, features, and possible applications of the present invention will become clear from the following description of embodiments thereof and the accompanying figures. In the figures, like elements are designated by like reference numerals. FIGURES

[0056] Figure 1 is an isometric view of an embodiment of a telescopic extension according to the invention mounted on a first type of side rail. The side rail without the telescopic extension mounted thereon is also shown in the figure. Figure 2 is an isometric view of the embodiment of the telescopic extension according to the invention according to Figure 1 mounted on a second type of side rail. The side rail without the telescopic extension mounted on it is also shown in the figure. Figure 3 is an enlarged isometric view of the embodiment of the telescopic extension according to the invention according to Figure 1 in the area of ​​the front quick-fastening element. Figure 4 is an enlarged isometric view of the embodiment of the telescopic extension according to the invention according to Figure 1in the area of ​​the front quick-release fastener, whereby for illustrative purposes only the anti-lift device of the front quick-release fastener is shown and the holder is hidden. Figure 5 is an isometric view of the embodiment of the telescopic extension according to the invention according to Figure 1 mounted on a second type of side rail, as shown in Figure 2 is shown, whereby for illustrative purposes only the inner rail of the telescopic extension is shown and other rail elements are hidden. Figure 6 is an enlarged isometric view of the embodiment of the telescopic extension according to the invention according to Figure 5 in the area of ​​the front quick-fastening element. Figure 7 is a representation of the embodiment of the telescopic extension according to the invention according to Figure 1viewed vertically from above in the area of ​​the front quick-fastening element. Figure 8 is an isometric view of the front quick-fastening element of the embodiment according to Figure 1 with a view of the side of the quick-fastening element facing the inner rail. Figure 9 is a side view of the front quick-fastening element of the embodiment according to Figure 1 with a view of the side of the quick-fastening element facing the inner rail. Figure 10 is an isometric view of the front quick-fastening element of the embodiment according to Figure 1 with a view of the side of the quick-fastening element facing away from the inner rail. Figure 11 is a side view of the front quick-fastening element of the embodiment according to Figure 1with a view of the side of the quick-fastening element facing away from the inner rail. Figure 12 shows the anti-lift device of the front quick-fastening element of the embodiment according to Figure 1 in a vertical view from above (left illustration) and in an isometric view (right illustration). Figure 13 shows the rear quick-fastening element of the embodiment according to Figure 1 in an isometric view (upper illustration) and in a vertical view from above (lower illustration). Figure 14 shows various enlarged isometric views of the rear quick-fastening element of the embodiment according to Figure 1mounted on a first type of side rail (upper right and lower right views) and on a second type of side rail (upper left and lower left views). Figure 15 shows an alternative embodiment of the rear quick-release fastener in an isometric view (upper view) and in a vertical view from above (lower view). Figure 16 shows various enlarged isometric views of the rear quick-release fastener of the embodiment according to Figure 15 mounted on a first type of side grille (upper right and lower right illustration) and on a second type of side grille (upper left and lower left illustration).

[0057] The Figures 1 to 7 show representations from different viewing directions and partly in an enlarged view of an embodiment of a telescopic pull-out 1 according to the invention mounted on a side grille 4 of an oven, wherein the side grilles 4 in the Figures 1 and 2 each designed differently in the rear area and in the lower illustrations of the Figures 1 and 2 are additionally shown without the telescopic extension 1 mounted on it.

[0058] Both variants of the Figures 1 and 2The types of side grids shown have a front vertical grid bar 5, a rear vertical grid bar 6 or 6' which is spaced apart from the front vertical grid bar 5 and arranged essentially parallel thereto, and at least one horizontal grid bar 7 which extends essentially perpendicular to the vertical grid bars 5 and 6 or 6' and connects them. The horizontal grid 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 grid bar 5, extends out of the plane spanned by the two vertical grid bars 5 and 6 or 6' in the direction of the interior of the open muffle and, at an angle, merges into the horizontal section 8 of the horizontal grid bar 7, which extends to the rear vertical grid bar 6 or 6'.

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

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

[0061] The telescopic extension 1 comprises a stationary inner rail 2 and an outer rail 3 which is mounted displaceably 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 Figures 1 to 4 An additional cover is arranged over the outer rail 3, which shields the telescopic extension from dirt from the oven's cooking chamber. In the illustrated embodiment, the inner rail 2 and the outer rail 3 are slidably mounted on 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 ball bearing balls arranged on the flanges of the C-profiles.

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

[0063] The Figures 8 to 11 show representations of the front quick-fastening element 11 from different viewing directions and Figure 12 shows representations of the anti-lift device 14 of the front quick-fastening element 11 alone.

[0064] The front quick-fastening element 8 comprises a holder 13 and an anti-lift device 14, which in the embodiment shown are designed as separate components. The holder 13 is welded to the rail back of the inner rail 2 via a fastening section 19, and the anti-lift device 14 is welded to the rail 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 mouth 17. When assembling the telescopic extension 1, the angled front end section 9 at the front end of the horizontal section 8 of the side rail 4 is inserted into the receiving area 16 of the hook 17 with a movement of the telescopic extension 1 in the insertion direction E through the hook mouth 17 and the hook 15 is lowered until it rests on the angled end section 9.

[0066] Furthermore, the holder 13 has a holding section 18 designed to engage around the front vertical grid bar 5 of the side grid 4, which in this embodiment has a U-shaped profile in cross-section and has on the inside of the U-profile a contact surface facing in the insertion direction E for engagement with a surface of the front vertical grid bar 5 facing in the extension direction A. When the telescopic extension is mounted on the side grid, the holding section 18 is brought into engagement with the front vertical grid bar 5 when the hook 13 is pushed in the insertion direction over the angled front end section 9 of the horizontal grid bar 7. By engaging around the vertical grid bar 5, the U-shaped holding section 18 prevents a lateral movement of the holder 13 away from the side grid in the direction of the muffle interior when the telescopic extension 1 is mounted.Furthermore, the holder 13 has on its underside a stabilizing section 25 extending essentially vertically at an angle, which gives the holder bending stability.

[0067] The anti-lifting device 14, which in this embodiment is designed as a separate component, has a support section 20, a hook-type locking section 21, a spring section 22 and a bending lock 24 extending from the hook-type locking section 21 at an angle to a contact surface on the inner rail 2.

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

[0069] The spring section 22 is formed as a resilient sheet metal whose plane or surface is arranged perpendicular to the extension direction A and substantially parallel to the front vertical lattice bar 5. Extending from the upper end of the spring section 22 at an angle to the extension direction is an actuating tab 23 for actuation by an operator to move the hook jaw locking section 21 from a securing position to a releasing position. The spring section is shown in a non-preloaded rest position with the hook jaw locking section 21 in the securing position.

[0070] The Figures 1 , 2 and 5 The rear quick-fastening element 12 of a first embodiment shown in Figure 13 shown alone in an isometric view as well as in a vertical top view. Figure 14shows various enlarged isometric views of this rear quick-attachment element 12 mounted on the two different types of side rails 4 as shown in the Figures 1 and 2 respectively. The Figures 15 and 16 show an alternative embodiment of the rear quick-attachment element 12 in representations similar to those in the Figures 13 and 14 .

[0071] The rear quick-fastening element 12 has a support bracket 26, a first contact section 27, and a second contact section 29 arranged offset from the first contact section 27 in the insertion direction E. The first contact section 27 and the second contact section 29 have a U-shaped cross-section for encompassing a rear vertical lattice bar 6 or 6' from a side of the vertical lattice bar 6 or 6' facing in the extension direction (A) as well as from the two sides perpendicular thereto.

[0072] The support angle 26 connects the first contact section 27 and the second contact section 29 and has two sections arranged at an angle substantially perpendicular to one another, at the respective free ends of which the contact sections 27 and 29 are arranged.

[0073] In the Figures 13 and 14 In the first embodiment of the rear quick-fastening element 12 shown, the support angle 26 and the second contact 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 Figures 15 and 16In the second embodiment of the rear quick-fastening element 12 shown, only the support bracket 26 has a cutout 28, since in this embodiment the second contact 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 rail 4 of the first variant, in which the horizontal section 8 of the horizontal rail 7 extends straight to the rear vertical rail 6 and as shown in Figure 2 As shown, the horizontal lattice bar 7 extends through the cutout 28 and the support angle 26 rests on the section of the horizontal lattice bar 7 extending through the cutout 28.

[0074] In both of the Figures 13 to 16In the embodiments of the rear quick-fastening element 12 shown, the support angle 26 has a fixing section 30 welded to the rail 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 original disclosure, it is pointed out that all features as they become apparent to a person skilled in the art from the present description, the drawings, and the claims, even if they were specifically described only in conjunction with certain other features, can be combined both individually and in any combination with other features or groups of features disclosed herein, unless this has been expressly excluded or technical circumstances make such combinations impossible or pointless. A comprehensive, explicit presentation of all conceivable combinations of features is omitted here solely for the sake of brevity and readability of the description.

[0076] While the invention has been illustrated and described in detail in the drawings and the foregoing description, such illustration and description are given by way of example only and are not intended to limit the scope of the invention as defined by the claims. The invention is not limited to the disclosed embodiments.

[0077] Modifications of the disclosed embodiments will be apparent to those skilled in the art from the drawings, the description, and the appended claims. In the claims, the word "comprising" does not exclude other elements or steps, and the indefinite article "a" or "an" does not exclude a plurality. The mere fact that certain features are claimed in different claims does not exclude their combination. Reference signs in the claims are not intended to limit the scope of protection. List of reference symbols

[0078] 1Telescopic extension 2Stationary inner rail 3Outer rail 4Side rail 5Front vertical bar 6Rear vertical bar 6Rear vertical bar 7Horizontal bar 8Horizontal section 9Front end section of the horizontal bar 10Rear end section of the horizontal bar 11Front quick-release fastener 12Rear quick-release fastener 13Holder 14Anti-lift device 15Hook 16Receiving area 17Hook jaw 18Holding section 19Fastening section 20Support section 21Hook jaw locking section 22Spring section 23Operating tab 24Bending device 25Stabilization section 26Support bracket 27First contact section of the support bracket 28Cutout 29Second contact section of the support bracket 30Fixing section EInsertion direction AExtension direction

Claims

1. Telescopic pull-out (1) - with a stationary inner rail (2) and at least one outer rail (3) which is displaceably 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-fastening element (11) and a rear quick-fastening element (12), which are fixed at a distance from one another on the inner rail (2) of the telescopic pull-out, - wherein the quick-fastening elements (11, 12) are designed for a detachable mounting of the telescopic pull-out (1) on a side grille (4) which has at least one front vertical grille bar (5), a rear vertical grille bar (6) which is spaced apart from the front vertical grille bar (5) and arranged substantially parallel thereto, and at least one rear vertical grille bar (6) which is arranged substantially perpendicular to the vertical grille bars (5,6) and connecting them, wherein the horizontal lattice bar (7) has at a front end an angled front end portion (9) which is connected to the front vertical lattice bar (5), extends out of the plane spanned by the two vertical lattice bars (5, 6) and, at an angle, merges into a horizontal portion (8) of the horizontal lattice bar (7), which extends to the rear vertical lattice bar (6), and wherein the horizontal lattice bar (7) has at a rear end opposite the front end i) an angled rear end portion (9) which is connected to the rear vertical lattice bar (6), extends out of the plane spanned by the two vertical lattice bars (5, 6) and, at an angle, merges into the horizontal portion (8) of the horizontal lattice bar (7), or ii) is directly connected to the rear vertical lattice bar (6),wherein the rear quick-fastening element (12) has a support bracket (26), a first contact section (27), and a second contact section (29) arranged offset from the first contact section (27) in the insertion direction (E), - wherein the first contact section (27) is designed for engagement with a rear vertical lattice bar (6) in the insertion direction (E) and has a surface facing in the insertion direction (E) for support on a surface of a rear vertical lattice bar (6) facing in the extension direction (A) when the telescopic rail (1) is mounted on a side rail (4), - wherein the second contact section (27) is designed for engagement with a rear vertical lattice bar (6') in the insertion direction (E) and has a surface facing in the insertion direction (E) for support on a surface of a rear vertical lattice bar (6') facing in the extension direction (A),when the telescopic rail (1) is mounted on a side rail (4), and - wherein the support bracket (26) connects the first contact section (27) and the second contact section (29) in a straight or angled manner.

2. Telescopic extension (1) according to claim 1, - wherein the support angle (26) has a cutout (28) or the support angle (26) and the second contact section (29) have a cutout (28) which is designed and arranged for inserting 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 angle (26) has a fixing section (30) for connecting the rear quick-fastening element (12) to the stationary inner rail (2).

4. Telescopic extension (1) according to one of the preceding claims, - wherein the first contact section (27) and / or the second contact section (29) have a U-shaped cross section for encompassing a rear vertical lattice bar from a side pointing in the extension direction (A) and from the two sides perpendicular thereto, or - wherein the first contact section (27) and / or the second contact section (29) have an L-shaped cross section for encompassing a rear vertical lattice bar from a side pointing in the extension direction (A) and from a side perpendicular thereto.

5. Telescopic extension (1) according to one of the preceding claims, - wherein the support angle (26) has a support surface for placing and supporting the rear quick-fastening element (12) on a horizontal lattice bar (7) or - wherein the support angle (26) has a recess with a support surface for supporting the rear quick-fastening element (12) on a horizontal lattice bar (7) and with lateral edges extending from the support surface for encompassing the horizontal lattice bar (7).

6. Telescopic extension (1) according to one of the preceding claims, - wherein the front quick-fastening element (8) comprises a holder (13) and a lift-out protection device (14), which are designed as separate components or are firmly connected or connectable to one another or are formed as a single 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 rail (4) can be inserted into the receiving area (16) of the hook (17) through the hook mouth (17), - has a holding section (18) designed for engagement with the front vertical rail (5) or for gripping around the front vertical rail (5) of a side rail (4),which has at least one contact surface facing in the insertion direction (E) for contact with a surface of the front vertical grid bar (5) of a side grid (4) facing in the extension direction (A), and - a fastening section (19) for connecting the holder (13) to the stationary inner rail (2), and - wherein the anti-lift device (14) has a support section (20), a hook-type locking section (21) and a spring section (22), - wherein the support section (20) is firmly or detachably connected to the stationary inner rail (2) or is firmly connected to the holder (13) or is formed integrally with the holder (13), - wherein the hook-type locking section (21) is connected to the support section (20) via the spring section (22) and can be moved from a securing position against a restoring force of the spring section (22), in extension direction (A)is movable into a release position, so that the hook mouth (17) with the hook mouth securing section (21) has a first opening width in the release position and with the hook mouth securing section (21) in the securing position has a second opening width determined by the hook mouth securing section (21), which is smaller than the first opening width.

7. Telescopic extension (1) according to the preceding claim, - wherein the anti-lifting device (14) on the hook jaw locking section (21) and / or on the spring section (22) further comprises a bending lock (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 a 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 a movement of the spring section (22) in the insertion direction (E) of the telescopic extension (1), wherein the bending lock (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 anti-lift device (14) are each made as separate components in one piece from bent sheet metal, wherein the holder (13) is fastened to the inner rail (2) via the fastening section (19), preferably welded, and wherein the anti-lift device (14) is fastened to the inner rail (2) via the support section (20), preferably welded.

9. Telescopic extension (1) according to one of claims 6 to 8, - wherein the opening of the hook mouth (17) of the hook (15) is aligned for insertion of an angled front end section (9) at the front end of the horizontal section (8) of a side rail (4) into the receiving area (16) of the hook (17) in the insertion direction (E) and / or - wherein the hook mouth securing section (21) extends from the spring section (22) in the insertion direction (E).

10. Telescopic extension (1) according to 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 lattice bar, - wherein the spring section (22) is preferably arranged such that it is in a non-prestressed rest position when the hook jaw locking section (21) is in a securing position, and it is spring-biased with a restoring force in the extension direction (A) when the hook jaw locking section (21) is in a releasing position.

11. Telescopic pull-out (1) according to one of claims 6 to 10, - wherein an actuating tab (23) extending in the extension direction or at an acute angle to the extension direction is provided on the spring section (22), on the hook jaw locking section (21) or on a bending lock (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 securing position to a releasing position.

12. Telescopic extension (1) according to 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 an angle, preferably substantially perpendicularly, 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).

13. A combination of a telescopic extension (1) according to one of the preceding claims and a side grille (4) for a furnace muffle, wherein the side grille (4) has a front vertical grille bar (5), a rear vertical grille bar (6) spaced apart from the front vertical grille bar (5) and arranged substantially parallel thereto, and at least one horizontal grille bar (7) extending substantially perpendicular to and connecting the vertical grille bars (5, 6), wherein the horizontal grille bar (7) has an angled front end section (9) at a front end, which is connected to the front vertical grille bar (5), extends out of the plane spanned by the two vertical grille bars (5, 6), and merges at an angle into a horizontal section (8) of the horizontal grille bar (7), which extends to the rear vertical grille bar (6),and wherein the horizontal grid bar (7) has, at a rear end opposite the front end, i) an angled rear end portion (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 merges at an angle into the horizontal portion (8) of the horizontal grid bar (7), or ii) is directly connected to the rear vertical grid bar (6), - wherein the front end portion (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 portion (9) when the telescopic extension (1) is mounted on the side grid (4).

Images