The present invention relates to a retaining device for retaining a built-in appliance, in particular a built-in sink unit, on a worktop, comprising the following:
at least one appliance-side retaining element,
at least one worktop-side retaining element and
at least one tensioning element for bracing the worktop-side retaining element and the appliance-side retaining element relative to one another,
wherein the tensioning element comprises a threaded portion, a retaining portion and a reduced-diameter portion, which is disposed between the threaded portion and the retaining portion and the diameter of which is smaller than the diameter of the retaining portion, and
wherein the appliance-side retaining element has at least one through-opening, through which in the fitted state of the retaining device the reduced-diameter portion of a tensioning element extends.
Such a retaining device for retaining a built-in sink unit on a worktop is known from the Canadian patent specification No. 1 246 805.
With this known retaining device, during the operation of fitting the retaining device an end face of the retaining portion of the tensioning element facing the reduced-diameter portion is pulled towards a horizontally oriented support surface of the appliance-side retaining element, with the result that the tensioning element in the fitted state of the retaining device is supported only by means of this end face of the retaining portion against the appliance-side retaining element.
The underlying object of the present invention is to provide a retaining device for retaining a built-in appliance on a worktop of the initially described type that has increased stability.
In a retaining device having the features of the preamble of claim 1, this object is achieved according to the invention in that the retaining portion of the tensioning element and/or the threaded portion of the tensioning element in the fitted state of the retaining device is supported at its periphery against the appliance-side retaining element.
By virtue of the fact that the retaining portion and/or the threaded portion of the tensioning element in the fitted state are supported at support points disposed on the periphery of the retaining portion and/or of the threaded portion against the appliance-side retaining element, a tilting of the tensioning element relative to the appliance-side retaining element is effectively prevented and the stability of the retaining device in the fitted state is markedly increased compared to the retaining device of the Canadian patent specification No. 1 246 805, in which the tensioning element in the fitted state of the retaining device is supported merely be means of an end face of the retaining portion against a horizontal support surface of the appliance-side retaining element, this however not providing any adequate support against a tilting movement of the tensioning element in a direction transversely of the longitudinal axis of the tensioning element. With the retaining device according to the invention, on the other hand, the tensioning element is secured against a tilting movement transversely of its longitudinal axis.
It is particularly advantageous if the tensioning element in the fitted state of the retaining device is supported against the appliance-side retaining element at least two support points that are mutually spaced apart along the longitudinal axis of the tensioning element.
In a preferred development of the retaining device according to the invention it is further provided that the appliance-side retaining element has a fastening region, with which the appliance-side retaining element in the fitted state of the retaining device can be positioned against an edge region of the built-in appliance.
In contrast thereto, in the retaining device known from the Canadian patent specification No. 1 246 805, the appliance-side retaining element is welded to a sink side wall of a sink of the built-in sink unit. The welding of the appliance-side retaining element to the sink side wall produces visible spot welds in the visible region of the sink.
If the fastening region of the appliance-side retaining element is then disposed, not on a vertical visible surface of the built-in appliance, but instead on the edge region of the built-in appliance, the production of visible spot welds on the vertical visible surfaces of the built-in appliance, in particular on a sink side wall, is prevented.
If the appliance-side retaining element is disposed on the edge region of the built-in appliance, the retaining device is situated at the best position for pulling the outer edge of the built-in appliance with the greatest possible application force towards the upper side of the worktop.
An effect achieved by the retaining device according to the invention acting directly upon the edge region of the built-in appliance is that particularly the corners of the edge region of the built-in appliance do not protrude in an upward direction from the worktop in the fitted state of the built-in appliance.
Especially if the built-in appliance is a built-in sink unit with a tap ledge, the region of the tap ledge may also be pulled with a high application force towards the worktop, this being impossible if the appliance-side retaining element of the retaining device is disposed on a sink side wall.
This development of the retaining device according to the invention offers the further advantage that the cut-out in the worktop may follow the external contour of the built-in appliance and not the course of central, vertical visible surfaces of the built-in appliance, in particular of sink side walls of a built-in sink unit. This offers advantages for the freedom of configuration when designing the respective built-in appliance.
In particular, given the use of a retaining device, the tap ledge of a built-in sink unit may be situated lower than the sink unit edge.
With such a retaining device it is possible to achieve a particularly low gap dimension between the built-in appliance and the upper side of the worktop.
The edge region of the built-in appliance is stabilized particularly well by means of such a retaining device.
The appliance-side retaining element disclosed in the Canadian patent specification No. 1 246 805 is totally unsuitable for being disposed on the edge region of the built-in sink unit. Furthermore, according to this published specification the edge region of the sink unit is to remain flexible to allow the sink unit edge to be pulled towards the worktop even if the upper side of the worktop is uneven. This teaching of the Canadian patent specification No. 1 246 805 leads precisely away from the solution according to the invention of disposing the appliance-side retaining element on the edge region of the built-in appliance in order to mechanically stabilize this edge region.
In a preferred development of the retaining device according to the invention it is provided that the appliance-side retaining element in the fitted state of the retaining device can be fastened, in particular by welding or gluing, by the fastening region to the edge region of the built-in appliance.
In particular it may be provided that the appliance-side retaining element in the fitted state of the retaining device can be positioned by the fastening region against a portion of the edge region that is oriented substantially horizontally in the fitted state of the built-in appliance.
The through-opening of the appliance-side retaining element preferably comprises at least one retaining portion, through which the reduced-diameter portion of the tensioning element passes in the fitted state of the retaining device, and at least one introduction portion, through which the retaining portion of the tensioning element can be introduced during fitting of the retaining device in order to bring the tensioning element and the appliance-side retaining element into engagement with one another.
Such an introduction portion may be disposed in particular on a region of the appliance-side retaining element that is oriented substantially vertically in the fitted state of the retaining device.
As an alternative to this, it may also be provided that the introduction portion of the through-opening is disposed on a region of the appliance-side retaining element that is oriented substantially horizontally in the fitted state of the retaining device.
The retaining portion of the through-opening of the appliance-side retaining element is disposed preferably on a region of the appliance-side retaining element that is oriented substantially horizontally in the fitted state of the retaining device.
The sequence of the operation of fitting the built-in appliance on the worktop may be made particularly flexible if the introduction portion of the through-opening is so configured that the retaining portion of the tensioning element can be introduced through the introduction portion when the built-in appliance has already been inserted into a cut-out of the worktop.
If the area of passage of the introduction portion of the through-opening is larger than the cross-sectional area of the retaining portion of the tensioning element, this allows the tensioning element to be pushed along its longitudinal axis into the introduction portion of the through-opening.
If the area of passage of the introduction portion of the through-opening is larger than the area of a longitudinal section through the retaining portion of the tensioning element along a longitudinal axis of the tensioning element, this allows the retaining portion of the tensioning element to be pushed transversely of the longitudinal axis of the tensioning element through the introduction portion.
The retaining portion of the through-opening may in particular be so configured that it extends, starting from the introduction portion of the through-opening, in a longitudinal direction of the edge region of the built-in appliance.
The through-opening may in particular comprise two retaining portions that extend from the introduction portion of the through-opening in mutually opposite directions.
In a special development of the retaining device according to the invention it is provided that the at least one retaining portion of the through-opening extends substantially parallel to a longitudinal direction of the edge region of the built-in appliance.
As an alternative to this, it may also be provided that the at least one retaining portion of the through-opening extends transversely of, preferably substantially perpendicularly to, a longitudinal direction of the edge region of the built-in appliance.
Furthermore, in a special development of the retaining device according to the invention it may be provided that the through-opening of the appliance-side retaining element opens out at an edge of the appliance-side retaining element.
In this case, it may in particular be provided that the through-opening comprises a bent path that leads from an edge of the appliance-side retaining element to a retaining portion of the through-opening, through which retaining portion the reduced-diameter portion of the tensioning element passes in the fitted state of the retaining device.
In a particularly preferred development of the retaining device according to the invention, the appliance-side retaining element comprises the fastening region, a retaining region, against which is disposed a retaining portion of the through-opening, through which retaining portion the reduced-diameter portion of the tensioning element passes in the fitted state of the retaining device, and a connecting region that connects the fastening region to the retaining region, wherein the connecting region merges at folds into the fastening region and into the retaining region.
In this case, the fastening region, the connecting region and the retaining region may together have a substantially Z-shaped cross section.
In order to increase the rigidity of the appliance-side retaining element, it is advantageous if the appliance-side retaining element further comprises an additional bent region that merges at a further bend into the retaining region.
A tilting of the appliance-side retaining element relative to the built-in appliance is prevented in a particularly effective manner if the additional bent region in the fitted state of the retaining device abuts a side wall of the built-in appliance.
This additional bent region may be bent from the retaining region towards the same side of the retaining region as the connecting region.
As an alternative to this, it may also be provided that the additional bent region is bent from the retaining region towards the side of the retaining region remote from the connecting region.
The additional bent region may be oriented substantially perpendicularly to the retaining region.
As an alternative to this, it may also be provided that the additional bent region is oriented at an acute angle to the retaining region. Such a development of the additional bent region is particularly suitable for supporting the threaded portion of the tensioning element against the additional bent region of the appliance-side retaining element in the fitted state of the retaining device.
If the tensioning element in the fitted state of the retaining device is supported against the additional bent region of the appliance-side retaining element, this effectively prevents a tilting of the tensioning element relative to the appliance-side retaining element.
A tilting of the worktop-side retaining element relative to the built-in appliance is effectively prevented if the worktop-side retaining element in the fitted state of the retaining device is supported against the built-in appliance.
In order to secure the worktop-side retaining element in its angular position relative to the tensioning element during the bracing of the worktop-side retaining element and the appliance-side retaining element towards the worktop, it is advantageous if the worktop-side retaining element is provided with at least one claw for digging into the worktop.
Claim 28 is directed to a combination of a built-in appliance, in particular a built-in sink unit, and at least one retaining device according to the invention.
In a preferred development of such a combination, the built-in appliance takes the form of a built-in sink unit and comprises at least one sink, wherein the edge region of the built-in sink unit projects out from the sink towards an outer edge of the built-in sink unit. The appliance-side retaining element of the retaining device according to the invention is then disposed on this edge region of the built-in sink unit that projects towards the outer edge of the built-in sink unit.
Further features and advantages of the invention are the subject matter of the following description and the graphical representation of embodiments.
Identical or functionally equivalent elements are denoted in all of the figures by the same reference characters.
A built-in appliance for example in the form of a built-in sink unit 100, a detail of which is shown in
In the embodiment shown here, the sink 116 is manufactured separately from the edge region 102 of the built-in sink unit 100 and fastened—for example by welding—to the edge region 102. As an alternative to this, it would however also be possible to manufacture the sink 116 integrally with the edge region 102 of the built-in sink unit 100.
The sink unit 100 may in principle be manufactured from any desired material.
Preferably, the sink unit 100 is formed from a metal material, preferably from a steel material, in particular from a nickel chromium steel.
As may be seen from
The worktop 122 is carried for example by side walls 128 of a kitchen base unit.
In order to fasten the built-in sink unit 100 to the worktop 122 in such a way that it is no longer removable in an upward direction from the cut-out 120, on the edge region 102 of the built-in sink unit 100 a plurality of appliance-side retaining elements 132 extending in each case in the longitudinal direction 130 of the edge region 102 are fastened and interact with in each case one or more worktop-side retaining elements 134 and in each case one or more tensioning elements 136 in such a way that the built-in sink unit 100 is braced towards the worktop 122.
An appliance-side retaining element 132 therefore together with one or more worktop-side retaining elements 134 and one or more tensioning elements 136 forms a retaining device 138 for retaining the built-in sink unit 100 on the worktop 122.
As may be seen from
It is however also possible for a plurality of appliance-side retaining elements 132 that are mutually spaced apart in the longitudinal direction 130 of the edge region 102 of the built-in sink unit 100 to be provided along each longitudinal side of the built-in sink unit 100.
As may best be seen from
The fastening region 140 and the retaining region 148 therefore project in different directions from the connecting region 144.
The appliance-side retaining element 132 lies with the fastening region 140 against the underside of the horizontal edge portion 104 of the edge region 102 of the built-in sink unit 100 and is fastened—for example by welding—to the edge region 102 of the built-in sink unit 100.
In order to be able to bring the appliance-side retaining element 132 into engagement with the tensioning element 136, the appliance-side retaining element 132 is provided with at least one through-opening 150 for the tensioning element 136.
As may best be seen from
The retaining portion 158 may also, like the threaded portion 154, be provided with an external thread.
The external thread of the threaded portion 154 and of the retaining portion 158 may in particular take the form of a left-hand thread.
The reduced-diameter portion 156 takes the form of a relief groove between the threaded portion 154 and the retaining portion 158 and preferably has a curved outer surface in order to avoid notch effects.
The screw head 152 preferably takes the form of a Robertson screw head, i.e. a screw head having a central recess 160 with a substantially square cross section for receiving the tip of a Robertson screwdriver.
The external contour of the screw head 152 may for example be of a hexagonal design in order to allow the tensioning element 136 to be rotated by means of a spanner.
The through-opening 150 of the appliance-side retaining element 132 is of a keyhole-shaped design and comprises an approximately circular introduction portion 162, which is disposed on the connecting region 144 and the diameter of which exceeds the outside diameter D of the retaining portion 158, and a retaining portion 164, which extends from the bottom edge of the introduction portion 162 into the retaining region 148 of the appliance-side retaining element 132 and the width b of which (i.e. the extent thereof in the longitudinal direction 130 of the edge region 102 of the built-in sink unit 100) is smaller than the outside diameter D of the retaining portion 158 of the tensioning element 136 and slightly larger than the smallest outside diameter d of the reduced-diameter portion 156.
The tensioning element 136 may therefore be introduced by the retaining portion 158 through the introduction portion 162 of the through-opening 150, until the reduced-diameter portion 156 passes into the region of the through-opening 150, and is then moved in such a way relative to the appliance-side retaining element 132 that the reduced-diameter portion 156 passes into the retaining portion 164 of the through-opening 150 and the retaining portion 158 of the tensioning element 136 is supported against the region of the appliance-side retaining element 132 that surrounds the retaining portion 164 of the through-opening 150.
The worktop-side retaining element 134 is shown individually in
The support region 168 is provided at its upper end with two sharp-spiked claws 170 that are able to dig into the underside 172 of the worktop 122.
The coupling region 166 of the worktop-side retaining element 134 is provided with a tapped hole 174, the internal thread of which is of a complementary design to the external thread of the tensioning element 136, so that the tensioning element 136 may be screwed by its threaded portion 154 into the tapped hole 174 of the worktop-side retaining element 134, in the manner shown in
The operation of fitting the built-in sink unit 100 on the worktop 122 is described below with reference to
In the initial state shown in
In this case, the tensioning element 136 is inserted far enough through the introduction portion 162 for the reduced-diameter portion 156 of the tensioning element 136 to be situated in the introduction portion 162 (see
The tensioning element 136 is then pivoted into the vertical, with the result that the reduced-diameter portion 156 moves from the introduction portion 162 of the through-opening 150 into the retaining portion 164 thereof (see
The worktop-side retaining element 134 is moreover rotated in such a way that the coupling region 166 and the support region 168 are aligned substantially parallel to the longitudinal direction 130 of the edge region 102 of the built-in sink unit 100 and hence also substantially parallel to the boundary wall 178 of the cut-out 120 in the worktop 122.
In this position, the built-in sink unit 100 with the retaining devices 138 disposed thereon may be inserted from above into the cut-out 120 of the worktop 122, thereby achieving the state shown in
The worktop-side retaining element 134 is then rotated (through an angle of ca. 90°) from the insertion position shown in
The tensioning element 136 is then rotated by means of a suitable tool, for example a Robertson screwdriver, about its longitudinal axis 176 in such a way that the worktop-side retaining element 134 in engagement with the threaded portion 154 and the appliance-side retaining element 132 in engagement with the reduced-diameter portion 156 are moved towards one another and hence braced towards one another and towards the worktop 122.
During the bracing operation the retaining portion 158 of the tensioning element 136 lies with its periphery against a first support point 180 on the connecting region 144 of the appliance-side retaining element 132, and the reduced-diameter portion 156 lies with its periphery against a second support point 182 on the edge of the retaining portion 164 of the through-opening 150 of the appliance-side retaining element 132, with the result that the tensioning element 136 is supported against the appliance-side retaining element 132 at two, in relation to the longitudinal axis 176 of the tensioning element 136, diametrically opposite support points 180, 182 and is therefore prevented from tilting relative to the appliance-side retaining element 132.
After the appliance-side retaining element 132 and hence also the edge region 102 of the built-in sink unit 100 have been pulled towards the upper side 126 of the worktop 122, the fitting of the built-in sink unit 100 on the worktop 122 is complete.
Disassembly of the built-in sink unit 100 is effected by reversing the previously described operations.
The tensioning element 136 is formed preferably from a metal material, in particular from a steel material.
The appliance-side retaining element 132 and the worktop-side retaining element 134 are likewise formed preferably from a metal material, in particular from a sheet steel, by means of cutting and folding operations.
A second embodiment of a retaining device 138 shown in
Otherwise the second embodiment of a retaining device 138 shown in
A third embodiment of a retaining device 138 shown in
By virtue of the additional bend an additional stiffening of the appliance-side retaining element 132 is simultaneously achieved.
Otherwise the third embodiment of a retaining device 138 shown in
A fourth embodiment of a retaining device 138 shown in
Otherwise the fourth embodiment shown in
A fifth embodiment of a retaining device 138 shown in
As may best be seen from
As is shown in
The length of the reduced-diameter portion 156 in this embodiment is greater than in the previously described embodiments.
This embodiment of the retaining device 138, in which the tensioning element 136 is not inserted into the through-opening 150 of the appliance-side retaining element 132 in a horizontal orientation or an orientation only slightly inclined relative to the horizontal but is fitted from below into the gap between the appliance-side retaining element 132, on the one hand, and the boundary wall 178 of the worktop 122, on the other hand, before then passing laterally through the through-opening 150 of the appliance-side retaining element, offers the advantage that the tensioning element 136 does not have to be already suspended from the appliance-side retaining element 132 prior to insertion of the built-in sink unit 100 into the cut-out 120 of the worktop 122, rather the suspension of the tensioning element 136 from the appliance-side retaining element 132 may alternatively be effected from underneath the worktop 122 after insertion of the built-in sink unit 100 into the cut-out 120 of the worktop 122.
Otherwise the fifth embodiment of a retaining device 138 shown in
A sixth embodiment of a retaining device 138 shown in
As may best be seen from
By displacing the tensioning element 136 in horizontal direction, the reduced-diameter portion 156 may then be moved into one of the two retaining portions 164 (see
The through-opening 150 of the appliance-side retaining element 132 in this embodiment therefore has the shape of an elongate hole that extends in the longitudinal direction 130 of the edge region 102 of the built-in sink unit 100.
In this embodiment of the retaining device 138 too, the tensioning element 136 may be suspended from the appliance-side retaining element 132 after the built-in sink unit 100 has already been inserted into the cut-out 120 of the worktop 122.
Otherwise the sixth embodiment of a retaining device 138 shown in
A seventh embodiment of a retaining device 138 shown in
In this embodiment, in the fitted state of the retaining device 138 the retaining portion 158 of the tensioning element 136 lies with its periphery against a first support point 180 on the connecting region 144 of the appliance-side retaining element 132, while the threaded portion 154 of the tensioning element 136 lies with its periphery against a second support point 182 on the additional bent region 184 of the appliance-side retaining element 132.
In the fitted state of the retaining device 138, the tensioning element 136 is therefore supported against the appliance-side retaining element 132 at two support points 180, 182, which lie in relation to the longitudinal axis 176 of the tensioning element 136 diametrically opposite one another and are markedly spaced apart from one another in vertical direction, thereby achieving particularly good support of the tensioning element 136 and in a particularly effective manner preventing a tilting of the tensioning element 136 relative to the appliance-side retaining element 132.
By virtue of the additional bend on the appliance-side retaining element 132, the appliance-side retaining element 132 is moreover additionally stiffened.
Otherwise the seventh embodiment of a retaining device 138 shown in
An eighth embodiment of a retaining device 138 shown in
As may best be seen from
The retaining portion 164, the width b of which is smaller than the outside diameter D of the retaining portion 158 of the tensioning element 136, is connected to the introduction slot 190 by a connecting channel 192 that extends substantially parallel to the longitudinal direction 130 of the edge region 102 of the built-in sink unit 100.
The width of this connecting channel 192, i.e. the extent thereof at right angles to the longitudinal direction 130, is likewise smaller than the outside diameter D of the retaining portion 158 of the tensioning element 136.
In this embodiment, moreover, the additional bent region 184 is not oriented substantially vertically but forms with the vertical an acute angle and in the fitted state of the retaining device 138 is inclined towards the tensioning element 136.
In this embodiment the procedure for suspending the tensioning element 136 from the appliance-side retaining element 132 is as described below with reference to
First the tensioning element 136 is inserted obliquely relative to the horizontal and obliquely relative to the vertical into the introduction slot 190 until the retaining portion 158 of the tensioning element 136 has passed through the introduction slot 190 and the reduced-diameter portion 156 comes to lie in the region of the introduction slot 190 (see
Then the tensioning element 136 is displaced parallel to the longitudinal direction 130 of the edge region 102 of the built-in sink unit 100, wherein the reduced-diameter portion 156 of the tensioning element 136 moves from the introduction slot 190 to the opposite end of the connecting channel (see
Finally the tensioning element 136 is pivoted from the oblique position into the vertical position in order to achieve the tensioning position shown in
In this position, the retaining portion 158 of the tensioning element 136 moreover lies with its periphery against a first support point 180 on the connecting region 144 of the appliance-side retaining element 132, while the threaded portion 154 of the tensioning element 136 lies with its periphery against a second support point 182 on the bottom edge 188 of the additional bent region 184.
Thus, in the fitted position of the retaining device 138 the tensioning element 135 is supported by the appliance-side retaining element 132 at two support points 180, 182 that lie in relation to the longitudinal axis 176 of the tensioning element 136 diametrically opposite one another and are markedly spaced apart vertically from one another, thereby in a particularly effective manner preventing a tilting of the tensioning element 136 relative to the appliance-side retaining element 132.
Otherwise the eighth embodiment of a retaining device 138 shown in
Number | Date | Country | Kind |
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10 2006 006 403.8 | Feb 2006 | DE | national |
This application is a continuation application of PCT/EP2007/000767 filed Jan. 30, 2007, the entire specification of which is incorporated herein by reference.
Number | Date | Country | |
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Parent | PCT/EP07/00767 | Jan 2007 | US |
Child | 12176042 | US |