EP1784605A1

EP1784605A1 - Height-adjustable device for an extractor hood which is fixed to a cover and extractor

Info

Publication number: EP1784605A1
Application number: EP05774111A
Authority: EP
Inventors: Gerd Eckardt; Heinz-Gerd Nolte; Dirk Schüsseler; Friedrich Walloth
Original assignee: Miele und Cie KG
Current assignee: Miele und Cie KG
Priority date: 2004-09-01
Filing date: 2005-08-16
Publication date: 2007-05-16
Anticipated expiration: 2025-08-16
Also published as: US20090305621A1; DE102004042291A1; EP1784605B1; WO2006024391A1; DE502005002120D1; DE102004042291B4

Abstract

The invention relates to a height-adjustable device for an extractor hood which is fixed to a cover. Said height-adjustable device comprises at least one guide rail which is provided with notches and a detent pawl which are fixed, in the mounted state of the height-adjustable device, to two parts, which can be displaced in relation to each other, of an extractor hood. The detent pawl can be displaced from an unlocked position, wherein said detent pawl is displaced along the longitudinal axis of the guide rail, into a locked position, wherein the detent pawl is prevented from being displaced along the longitudinal axis of the guide rail. In order to obtain a height-adjustable device for a extractor hood which is fixed to a cover, wherein height-adjustment is facilitated, the detent pawl (26) is engaged in the locked position such that it is prevented from being displaced along the longitudinal axis of the guide rail (24) in one direction (32) and allows said displacement to be carried out in the opposite direction (34). A snapping element is arranged on the detent pawl (26) and the guide rail (24), in the region of the front-sided ends thereof, and comprises an actuation element (24.5, 24.6). When said height-adjustable device is in the mounted state, the detent claw (26) can be displaced along the longitudinal axis of the guide rail (24) in one direction (32), by means of the co-operation of the snapping element with the one actuation element (24.5), automatically from the unlocking position to the clocking position and during displacement in the counter direction (34), by means of the co-operation of the snapping element with the other actuation element (24.6), automatically from the locking position to the locked position.

Description

Height adjustment device for a ceiling-mounted extractor hood and extractor hood

The invention relates to a height adjustment device for a ceiling-mounted extractor hood referred to in the preamble of claim 1 Art.

Such a height adjustment device is known for example from WO 02/093079 A1. The wall-mounted extractor hood disclosed therein comprises a height adjustment device which has a rack designed as a rack with detents and a hook-like pawl, wherein the guide rail is fixed in the mounted state of the height adjustment on a wall mounting plate and the pawl to the rest of the known extractor hood. The pawl is of an unlocking position in which a movement of the pawl along the longitudinal axis of the guide rail is made possible, in a locking position in which the pawl with the detents of the guide rail, so that a movement of the pawl along the longitudinal axis of the guide rail is prevented , convertible. In the known height adjustment device, the pawl is automatically held by means of a prestressed spring element in the locking position. By the operation of a cable attached to the pawl, the user can move the pawl from the locking position and against the spring force of the spring means in the unlocking position, then manually adjust the altitude of the known hood while maintaining the tension of the cable. Once the cooker hood is at the desired height, the user relaxes the cable and the pawl is automatically transferred back into the locking position due to the spring force of the spring means.

The invention thus provides the problem of providing a height adjustment for a ceiling-mounted hood, in which the height adjustment is facilitated.

According to the invention, this problem is solved by a height adjustment device having the features of patent claim 1. Advantageous embodiments and further developments of the invention will become apparent from the following subclaims.

The achievable with the invention advantages are in addition to a relief of height adjustment in particular in a reduced effort of the user in the height adjustment. Further, the user does not have to simultaneously tension a cable and support the hood against their weight or even move in the direction opposite to the weight force.

BESTÄTIGUNGSKOPΛE An advantageous development of the teaching according to the invention provides that the guide rail has a parallel to the longitudinal axis extending slot in which the pawl is guided in the mounted state of the height adjustment, wherein a longitudinal wall of the slot has detents and the opposite longitudinal wall of the slot substantially smooth is trained. As a result, the two functions of the guide rail, namely to guide the pawl in the height adjustment of the hood and to form in the locking position of the pawl with this a latching connection, solved simultaneously and in a structurally simple manner. In addition, the user is protected by the arrangement of the notches in the interior of a slot in the height adjustment against injury to the possibly sharp-edged notches.

An advantageous development of the aforementioned embodiment provides that substantially the entire longitudinal wall is provided with directly adjacent notches. In this way, a height adjustment with small step intervals is possible.

A particularly advantageous development of the aforementioned embodiments provides that the pawl is pivotally mounted about an in the mounted state of the height adjustment substantially perpendicular to the plane defined by the slot spanned plane pivot axis and that both longitudinal walls of the slot each having a ramp-like portion as actuating means. As a result, the height adjustment device according to the invention is realized in a structurally simple manner and robust.

A further advantageous embodiment of the aforementioned embodiment provides that the Umschnappmittel has an eccentrically arranged on the pawl and spaced from the pivot axis mass. In this way, the Umschnappmittel is particularly simple and robust realized.

Another advantageous development of the aforementioned embodiments provides that the Umschnappmittel has a spring means. As a result, a lightweight and material-saving design of the pawl is possible.

Basically, the design of the detents on the type, material and arrangement can be selected within wide suitable limits. Conveniently, the detents are sawtooth-like.

An advantageous development of the teaching according to the invention provides that the height adjustment device has a securing means with which the relative position of the guide rail to the pawl can be fixed. This ensures that the Height of the hood after a first setting is securely preserved and protected against undesired adjustments.

Another problem of the invention is to provide an extractor hood with a height adjustment device according to the invention.

This problem is solved by an extractor hood according to claim 9.

In principle, the arrangement of the height adjustment device according to the invention on the extractor hood according to the invention within wide suitable limits selectable. Conveniently, the guide rail is mounted in the mounted state of the height adjustment on a fan housing and the pawl to a Kamingehäuse the hood or vice versa.

An advantageous development of the extractor hood according to the invention provides that the height adjustment device in the mounted state has two diagonally opposite and spaced-apart guide rails, which are each with a pawl into engagement. As a result, the longitudinal guidance of the height adjustment relative to each other moving parts of the hood is improved, so that the risk of tilting in the height adjustment is reduced.

An embodiment of the invention is shown purely schematically in the drawings and will be described in more detail below. It shows

FIG. 1 shows a perspective view of an extractor hood according to the invention, the ceiling-mounted extractor hood being shown in the lowermost position, FIG. 2 shows the extractor hood from FIG. 1 with the outer panel housing pushed up and in the same view as in FIG.

3 shows a detail of the extractor hood from FIG. 2 in an enlarged view, FIG.

Figure 4 shows the hood of FIG. 2 without Außenkamingehäuse and in the same

View as in FIG. 2,

5 shows the Innenkamingehäuse of FIG. 4 in partial and enlarged view,

6 shows a height adjustment device according to the invention from FIG. 4 in partial

Representation, with the pawl in the unlocking position and in an enlarged front view, Figure 7, the height adjustment of the invention of FIG. 6 with the pawl in the locking position and in the same representation as in Fig. 6, Figure 8, the hood in a similar representation as in Fig. 4, wherein the

Extractor hood is shown in the topmost position, 9 shows the height adjustment device according to the invention in a hood of FIG. 8 assigned position, with the pawl in the locking position and in the same representation as in Fig. 6 and

10 shows the height adjustment device according to the invention from FIG. 9 with the pawl in the unlocking position and in the same representation as in FIG. 9.

1 shows a ceiling-mounted extractor hood according to the invention with a height adjustment device according to the invention. The extractor hood explained here is a circulating air hood. The following explanations are also valid for exhaust hoods. For ease of illustration, the ceiling to which the cooker hood is attached in a manner known to those skilled in the art, has not been shown. In Fig. 1, the hood with view is shown obliquely from above. The extractor hood has a Innenkamingehäuse 2, a Außenkamingehäuse 4 and a suction 6. All housings 2, 4 and 6 are made of sheet metal parts. The Außenkamingehäuse 4 is guided in the assembled state of the hood parallel to a symbolized by a dash-dotted line 8 vertical axis on the Innenkamingehäuses 2 slidably.

In Fig. 2 the extractor hood is shown in the same view as in Fig. 1. In contrast to FIG. 1, the extractor hood is shown here with the outer housing 2 pushed upwards along the inner housing 2. At the Innenkamingehäuse 2 a not shown in Fig. 2 and designed as a locking spring locking means is arranged to fix the Außenkamingehäuse 4 in the uppermost position shown here.

FIG. 3 shows a detail of the extractor hood in FIG. 2 in the area of the blocking means 10. The detent spring 10 has a ramp tapering downwards in the image plane, which makes it possible for the outer-shell housing 4 to be operated with little force and against the spring force of the detent spring 10 to move up in the image plane. Once the Außenkamingehäuse 4 has been transferred to the top position shown in Fig. 3, the detent spring 10 jumps back into the relaxation position shown in Fig. 3. The weight of the Außenkamingehäuses 4 is transmitted from the detent spring 10 on the Innenkamingehäuse 2, via which the entire extractor hood is held on the ceiling, not shown.

In Fig. 4, the extractor hood according to the invention is shown analogous to FIG. For better clarity, the Außenkamingehäuse 4 was not shown and the Innenkamingehäuse 2 shown broken in the front of the image plane area. As is clear from FIG. 4, a fan housing 12 and a flow channel 14 designed as a foldable exhaust air duct are arranged in the inner shell housing 2. The flow channel 14 connects in a manner known to those skilled in the blower outlet opening, not shown with the formed in the Innenkamingehäuse 2 blow-out 16. The example extracted via a cooktop, not shown extract air is returned in the aforementioned hood by slot-like openings 18 back into the same room.

FIG. 5 shows the inner shell housing 2 which has broken out in the front area in the image plane. The present extractor hood has a total of four angle rails 20 guided in the corner regions of the inner fireplace housing 2 along the vertical axis 8. The angle rails 20 are attached to the blower housing 12 shown in Fig. 4 and have at their free ends, which are shown in the image plane below, each plate angle 22 and 23. In the assembled state of the hood the Außenkamingehäuse 4 rests on the sheet metal angles 22. The suction housing 6 is held by means not shown screws on the sheet metal angle 23 and the angle rails 20 on the Innenkamingehäuse 2.

Two diagonally opposite and spaced-apart angle rails 20 are formed as guide rails 24. The guide rails 24 and the other angle rails 20 are made of sheet metal angles. In addition, the angle rails 20 and thus also the guide rails 24 each have a row of holes 25, whose function will be explained below. The guide rails 24 each have a parallel to the longitudinal axis extending slot 24.1, wherein the one longitudinal wall 24.2 of the slot 24.1 almost over its entire length directly adjacent and sawtooth-shaped notches 24.3 carries, while the other longitudinal wall 24.4 of the elongated hole 24.1 formed substantially smooth is. In the slots 24.1 of the guide rails 24 2 fixed pawls 26 are guided on the Innenkamingehäuse, which are explained in more detail below.

The following explanations based on a guide rail 24 and a pawl 26 apply to both pairings of guide rail 24 and pawl 26 mentioned above.

In Fig. 6, only the guide rail 24 and the pawl 26 and a mounting plate 28 is shown for the sake of clarity. The pawl 26 is fastened in the assembled state of the extractor hood by means of the mounting plate 28 on the inner wall of the inner fireplace housing 2. In the present exemplary embodiment, the pawl 26 is pivotable about an axis which is substantially perpendicular to the guide rail 24 in the mounted state of the height adjustment device pivotally mounted on the mounting plate 28. The pivot axis 30 extends in FIGS. 6, 7, 9 and 10 each perpendicular to the image plane. On the pawl 26, a not shown Umschnappmittel is arranged. The Umschnappmittel has in the present embodiment, designed as a prestressed coil spring spring means, which is held with its two ends to the pawl 26 and the mounting plate 28. The bias of the spring means causes the pawl 26 to be moved by the spring force in a manner known to those skilled in the art either into an unlatching position as shown in FIGS. 6 and 10 or into a locking position as shown in FIGS. 7 and 9.

The design of the guide rail 24 has already been explained with reference to FIG. 5 and is shown here in an enlarged view. In the unlocking position shown in FIG. 6, the pawl 26 is pressed due to the spring force, as explained above, against the substantially smooth longitudinal wall 24.4 of the elongated hole 24.1. In this position, the unlocking position, a movement of the pawl 26 along the longitudinal axis of the guide rail 24 is possible, in both directions. The pawl 26 is almost in the uppermost position relative to the guide rail 24, which means that the mounted on the ceiling hood is almost in the lowest position shown in Fig. 1, 2 and 4. In this position, the pawl 26 is located on a ramp-like and formed as an actuating means section 24.5 of the longitudinal wall 24.4. In the further transfer of the hood in the direction of the bottom layer, the pawl 26 would move relative to the guide rail 24 continues upwards. Here, the pawl 26 is pivoted due to the actuating means 24.5 and against the spring force of the spring means in the image plane in the clockwise direction about the pivot axis 30 in the locking position, which is shown in Fig. 7. In FIGS. 6, 7, 9 and 10, the rows of holes 25 are each indicated only by the uppermost hole in the image plane.

Fig. 7 shows the pawl 26 in the locking position in which the pawl 26 rests on the detents 24.3 supporting longitudinal wall 24.2 of the slot 24.1 and is latched with respect to the image plane uppermost catch. In this position, in the locking position, a movement of the pawl 26 along the longitudinal axis of the guide rail 24 in the direction of the arrow 32 is prevented and in the direction of the arrow 34 allows. If the extractor hood is transferred from the lowest position shown in FIGS. 1, 2 and 4 into the uppermost position shown in FIG. 8, the pawl 26 moves in the direction of the arrow 34, that is to say downwards in relation to the image plane in FIG ,

Once the pawl 26 has assumed the position shown in Fig. 9 when moving in the direction of arrow 34, the pawl 26 is located relative to the guide rail 24 almost in the lowest position. In this position, the pawl 26 is located on a ramp-like and formed as an actuating means section 24.6 of the longitudinal wall 24.2. In the further transfer of the hood in the direction of the uppermost layer, the pawl 26 would move relative to the guide rail 24 further down. In this case, the pawl 26 would be due to the actuating means 24.6 and pivoted against the spring force of the spring means of the Umschnappmittels in the image plane in the counterclockwise direction about the pivot axis 30 in the unlocking position, which is shown in Fig. 10. The pawl 26 is again movable in both directions along the longitudinal axis of the guide rail 24, so that the pawl 26 can be moved in the direction of the arrow 32 again, which means that the hood can be moved back into the lowest position.

The mode of operation of the height adjustment device according to the invention and of the extractor hood according to the invention is explained in more detail below with reference to FIG.

The hood is mounted on the ceiling and is located in the altitude of FIG. 1 and 7. In a height adjustment the Außenkamingehäuse 4 is moved over the Innenkamingehäuse 2 so far up until the detent spring 10 is released from the Außenkamingehäuse 4 and the can assume a relaxation position shown in Fig. 3. The Außenkamingehäuse 4 is held by the detent spring 10 in the uppermost position. The extractor hood turns now as shown in Fig. 2 is shown. The blower housing 12 with the attached thereto angle rails 20 and guide rails 24 is connected by means screwed into the rows of holes 25 and in the Innenkamingehäuse 2, not shown screws releasably connected to the Innenkamingehäuse 2. The aforementioned screw connection forms a securing means with which the relative position of the guide rails 24 to the pawls 26 can be fixed. In order to make a height adjustment, the screws must be loosened so that the blower housing 12 and the suction 6 are held for the period of height adjustment alone on the positive connection between the guide rails 24 and the pawls 26 on the Innenkamingehäuse 2.

After the screw connections are released, the hood is manually transferred from the bottom layer to the desired position between the lowermost and the uppermost layer. In this case, the pawl 26 located in the locking position, as already explained above with reference to FIGS. 7 and 9, moves in the direction of the arrow 34 from the detent 24.3 to the detent 24.3. Once the desired altitude of the hood is reached, the aforementioned screw is restored and lowered the Außenkamingehäuse 4 again on the Innenkamingehäuse 2 down until it on the mounting brackets 22nd rests. If the height adjustment is to be made again, the above steps are repeated. Since the pawl 26 located in the locking position can not be moved in the direction of the arrow 32 in the latter position and thus the extractor hood can not be lowered down again, it is necessary to completely convert the extractor hood in the uppermost position, which in the Fig. 8 and 10 is shown. In this case, the pawl 26 passes through the above explained with reference to FIGS. 9 and 10 transfer from the locking position into the unlocking position. The pawl 26 is in the unlocking position, so that the extractor hood can now be fully lowered again to the lowest position. The pawl 26 passes through the explained with reference to FIGS. 6 and 7 transfer from the unlocking position into the locking position. The Höhen¬ adjustment can be made again in accordance with the above.

The teaching of the invention is not limited to the above-described embodiment. For example, other known and suitable joining techniques and materials are conceivable. In addition, the Umschnappmittel is also executable as an eccentrically arranged on the pawl 26 and spaced from the pivot axis 30 mass, without alternatively or additionally to use a spring means. Notwithstanding the above embodiment, the height adjustment device according to the invention is also applicable to cooker hoods with external wall fan. In this case, then the angle rails 20 and the guide rails 24 would be attached directly to the suction 6, for example.

Claims

claims

1. height adjustment for a ceiling-mounted hood, wherein the height adjustment at least one guide rail with detents and a pawl which are mounted in the mounted state of the height adjustment to two relatively movable parts of a hood and wherein the pawl of a Entriegelungslage in which a movement the pawl along the longitudinal axis of the guide rail is made possible, in a locking position in which the pawl with the detents of the guide rail locked so that a movement of the pawl along the longitudinal axis of the guide rail is prevented, is transferable, characterized in that the pawl (26 ) is latched in the locking position such that a movement of the pawl (26) along the longitudinal axis of the guide rail (24) in one direction (32) prevented and in the opposite direction (34) is enabled and that at the Sperrkl inke (26) a Umschnappmittel is arranged and the guide rail (24) in the region of the front ends each having an actuating means (24.5, 24.6), wherein the pawl (26) in the mounted state of the height adjustment device during a movement along the longitudinal axis of the guide rail (24) in a direction (32) by means of the interaction of the latching means with the one actuating means (24.5) automatically from the unlocking position into the locking position and moving in the opposite direction (34) by the cooperation of the interlocking means with the other Actuating means (24.6) can be automatically transferred from the locking position into the unlocking position.

2. height adjustment device according to claim 1, characterized in that the guide rail (24) has a parallel to the longitudinal axis extending slot (24.1), in which the pawl (26) is guided device in the mounted state of Höhenverstell¬, wherein a longitudinal wall ( 24.2) of the slot (24.1) has notches (24.3) and the opposite longitudinal wall (24.4) of the slot (24.1) is substantially smooth.

3. height adjustment device according to claim 2, characterized in that substantially the one entire longitudinal wall (24.2) is provided with directly adjacent notches (24.3).

4. height adjustment device according to one of claims 2 or 3, characterized in that the pawl (26) is pivotably mounted about a pivot axis (30) extending substantially perpendicularly to the plane defined by the oblong hole (24.1) in the assembled state of the height adjustment device, and in that both longitudinal walls (24.2, 24.4) of the oblong hole (24.1) respectively a ramp-like portion (24.6, 24.5) as an actuating means.

5. height adjustment device according to claim 4, characterized in that the Umschnappmittel on the pawl (26) eccentrically arranged and spaced from the pivot axis mass.

6. height adjustment device according to claim 4 or 5, characterized in that the Umschnappmittel comprises a spring means.

7. height adjustment device according to at least one of claims 1 to 6, characterized in that the notches (24.3) are formed like a sawtooth.

8. height adjustment device according to at least one of claims 1 to 7, characterized in that the height adjustment device has a securing means with which the relative position of the guide rail (24) to the pawl (26) is fixable.

9. Extractor hood with a height adjustment device according to at least one of claims 1 to 8, characterized in that the guide rail (24) in the mounted state of the height adjustment on a fan housing (12) and the pawl (26) on a Kamingehäuse (2) of the hood is attached or vice versa.

10. Extractor hood according to claim 9, characterized in that the height adjustment device in the assembled state has two diagonally opposite and spaced-apart guide rails (24) which are each with a pawl (26) into engagement.