EP3933156A1 - Sliding door arrangement for a deep freeze furniture item - Google Patents

Abstract

The invention relates to a sliding door arrangement for a freezer cabinet, comprising - a door frame (1), - at least one sliding door (2), the sliding door (2) being movable between an open position and a closed position along the plane of the frame, and - a guide device (3) , wherein the guide device (2)• comprises roller assemblies (4), each with a first roller axis (5) and• at least one guide element (6) determining the movement of the sliding door (2), characterized in that the guide device (3) is designed in this way that the sliding door (2) moves transversely to the frame plane during a movement from the open position to the closed position, for which purpose the guide element (6) has a parallel section (7) and a closing section (8) and- the roller assemblies (4) each have at least one further roller axis (9).

Description

The present invention relates to a sliding door arrangement for a freezer cabinet, comprising a door frame, the door frame defining a frame plane which is in particular vertically aligned, at least one sliding door, the sliding door being movable between an open position and a closed position along the frame plane, and a guide device for Guiding the sliding door between the open position and the closed position, the guide device comprising roller arrangements each having a first roller axis and at least one guide element guiding the movement of the sliding door.

Such sliding door arrangements are known for refrigeration units in which a temperature in the low positive single-digit range is to be maintained in the refrigeration unit. It has been found that the known sliding door arrangements are not suitable for freezer units in which temperatures in the range of -20 ° C. are generated. This is because it has been shown that the known sliding door arrangements do not close sufficiently tightly so that ambient air penetrates into the freezer, which results in undesired ice formation in the freezer.

The object of the present invention is therefore to eliminate the disadvantages described with reference to the prior art and, in particular, to specify a sliding door arrangement which ensures sufficient sealing for freezer units from the environment.

The object is achieved by a sliding door arrangement with the features of the independent claim. Advantageous further developments of the sliding door arrangement are specified in the dependent claims and in the description, with individual features of the advantageous further developments being able to be combined with one another in a technically meaningful manner.

The object is achieved in particular by a sliding door arrangement with the features mentioned at the beginning, in which the guide device is designed such that the sliding door moves transversely to the frame plane when it moves from the open position to the closed position, for which the guide element is arranged parallel to the frame plane Has a parallel section and a closing section arranged transversely to the parallel section and for which the roller assemblies each have a further, in particular exactly one second roller axis, so that the roller assemblies can accommodate a movement component parallel to the parallel section as well as transversely to it when moving along the guide element.

The basic idea of the invention provides that the sliding door is moved transversely to the frame plane and thus towards the door frame when moving from the open position into the closed position at the end of the closing movement, whereby a pressing force of the sliding door on the door frame increases and thus also the tightness of a seal arranged between the door frame and the sliding door can be increased, whereas that Moving the sliding door along the frame plane can be done without great effort, since there is little or no friction between the sliding door and the door frame.

In order to enable the sliding door to move transversely to the frame plane, it is now proposed that the one or more guide elements have a parallel section optionally consisting of several components and an end section optionally consisting of several components. The parallel section or its components is / are arranged in such a way that a movement of the sliding door is guided parallel to the frame plane. The end section or its components, however, is / are designed so that the sliding door is moved transversely (obliquely) to the frame plane at least shortly before reaching the closed position, whereby the sliding door is moved towards the door frame. When the sliding door is opened, the end section ensures that the sliding door is initially moved away from the door frame, so that the sliding door can then simply be moved into an open position.

In addition, each roller arrangement has a second roller axis, which means that when the closing movement is to take place on the door frame, a movement / alignment of the roller arrangement that absorbs this closing movement takes place. It has been found that when using a roller with exactly one axis of rotation (which is also referred to as a fixed roller, for example), no sufficient pressing force to ensure sufficient tightness can be achieved.

In particular, the roller arrangement is arranged on the sliding door, while the guide element is stationarily connected to the door frame in a suitable manner or is formed / arranged on it.

In particular, at least two roller arrangements are assigned to each sliding door, and each roller arrangement can in turn be assigned its own guide element. However, it can also be provided that only exactly one guide element is assigned to the multiple roller arrangements of a sliding door. The sliding door comprises at least one (insulating) pane of glass so that a customer can look inside the freezer cabinet. The glass pane is inserted in a sliding door frame which also has the elements of the guide device and in particular the roller arrangements.

The sliding door arrangement preferably has exactly two sliding doors which are arranged on opposite sides of the door frame and each have a guide device.

The roller arrangement can be designed, for example, as a so-called all-side wheel, in which the running surface of the wheel itself consists of rollers. This omnidirectional wheel rotates parallel to the frame plane around the first (main) axis while the rollers forming the running surface are stationary. During the closing movement (transversely to the frame plane) towards the door frame, there is also a rotary movement of at least one of the rollers forming the running surface about a second roller axis (assigned to the respective roller).

However, an embodiment is preferred in which the first roller axis can be rotated about the second roller axis, so that the roller assemblies automatically align with both the parallel section and the final section when moving along the guide element. In this embodiment, each roller arrangement has exactly one roller, which rotates around the first, horizontally aligned roller axis during the movement between the open position and the closed position, while the roller rotates at a rotation / pivoting around the second, in particular vertically aligned roller axis can align according to the direction of movement of the sliding door. Such a roller arrangement is also known in particular as a steering roller. During the movement of the sliding door parallel to the frame plane, the first roller axis is aligned orthogonally to the frame plane, while the first roller axis due to a rotation / pivoting around the second roller axis during the movement towards the door frame (transversely to the frame plane) corresponding to the second roller axis is rotated / pivoted.

In both of the embodiments described above, the further, in particular precisely one second, roller axis is aligned parallel to the frame plane. In particular, the second roller axis is also aligned at a right angle to the first roller axis, the second roller axis (at least in a virtual extension) being able to intersect the first roller axis or being offset (skewed) from it.

In principle, it is conceivable that the guide device according to the invention is arranged on an upper side of the sliding door, so that the sliding door would be suspended by means of the guide device. However, it is preferred that the guide device and thus also the guide elements and the roller arrangements are arranged on an underside of the sliding door.

In particular when the guide device is arranged on an underside of the sliding door, it is preferred if the roller arrangements rest on at least one guide rail designed as a guide element. In this context, the parallel section is formed by a section of the guide rail aligned parallel to the plane of the frame, while the end section is formed by a section of the guide rail angled to the parallel section. Especially when in In this context, the roller arrangement is designed as a so-called steering roller, the roller can have a recess with which the roller rests on the guide rail, the roller having a projection formed by the recess on one, preferably on both sides, which laterally overlaps the guide rail so that the roller is aligned by rotating it around the second roller axis when the roller is transferred from the parallel section to the end section of the rail or back.

In order to prevent ice from forming on the guide element, in particular designed as a guide rail, it can be provided that the guide element or each guide element (in particular the guide rail) is provided with one or one heater in each case.

If the guide device according to the invention is arranged on an underside of the sliding door, it is advisable to enable the sliding door to be guided on its upper side with as little friction as possible. For this purpose, it is proposed that the sliding door has at least one upper roller in its upper area with an immovably mounted roller axis about which the upper roller rotates, the roller axis of the upper roller preferably being aligned parallel to the plane of the frame. The upper roller preferably rests against a contact element extending along the door frame, so that the upper roller rolls over the contact element.

So that the upper roller can follow the closing movement of the sliding door towards the door frame into the closed position, it can be provided, for example, that the contact element has a recess in which the upper roller is arranged in the closed position.

In order to seal the interior of the freezer unit equipped with the sliding door arrangement from the surroundings, a seal can be arranged between the door frame and the sliding door, the seal being attached either to the door frame or to the sliding door. The seal is in particular arranged circumferentially around the sliding door on the side facing the door frame, so that the sliding door is sealed on its periphery.

In order to further increase the seal against the environment, at least one magnetic element can be attached to the door frame and / or to the sliding door, by means of which the sliding door is held in the closed position. The magnetic element is in particular also attached in such a way that the sealing effect provided by the seal is ensured or increased. For this purpose, the magnetic element can also be arranged in the seal.

In one embodiment, the sliding door arrangement and in particular the guide device are designed in such a way that the sliding door automatically moves into the closed position from every open position. For this purpose, a force application device could be provided, for example, which biases the sliding door into the closed position.

However, it is preferred that the roller arrangement connected in particular to the sliding door arrangement rest on a support surface having a slope, so that the sliding door moves in the direction of the closed position due to gravity without any further action of force. In particular in the case of such an automatically closing sliding door, the invention represents a great advantage, since the forces required to reach the closed position are very low due to the second roller axis.

The door frame is formed in particular from a plastic material, wherein a heater can be arranged within a frame element formed from plastic, with which the sliding door can be prevented from freezing to the door frame in its closed position.

The invention relates in particular to freezer units which have a cooling unit for generating temperatures from below -15 ° C to -40 ° C, for example. In particular, it should be possible to generate temperatures of around -20 ° C. in the freezer unit without ambient air flowing into the freezer unit when the sliding doors are in the closed position.

Figur 1:

eine Schiebetüranordnung,

Figur 2:

eine Aufsicht auf eine Führungseinrichtung einer Schiebetür der Schiebetüranordnung in einer Öffnungsstellung der Schiebetür,

Figur 3:

die Ansicht gemäß Figur 2 in einer Schließstellung der Schiebetür,

Figur 4:

eine Aufsicht auf die Schiebetüranordnung im oberen Bereich der Schiebetüranordnung und

Figur 5:

eine Querschnittsansicht durch ein Element des Türrahmens und ein Teil der Schiebetüranordnung in der Schließstellung.

The invention and the technical environment are explained by way of example below with reference to the figures. It show schematically

Figure 1:

a sliding door assembly,

Figure 2:

a plan view of a guide device of a sliding door of the sliding door arrangement in an open position of the sliding door,

Figure 3:

the view according to Figure 2 in a closed position of the sliding door,

Figure 4:

a plan view of the sliding door assembly in the upper region of the sliding door assembly and

Figure 5:

a cross-sectional view through an element of the door frame and part of the sliding door arrangement in the closed position.

In the Figure 1 The illustrated sliding door arrangement comprises a door frame 1, on the front of which a first sliding door 2.1 and on the rear of which a second sliding door 2.2 is arranged. The door frame 1 defines a frame plane along which the sliding doors 2.1 and 2.2 can each be moved between an open position and a closed position. the Door frame 1 consists of frame elements 16 which are made of plastic.

The sliding door arrangement also has a guide device 3, each sliding door 2.1 and 2.2 having two roller arrangements 4 of the guide devices 3 on their respective underside. The roller arrangements 4 rest on guide elements 6 of the guide device 3. The guide device 3 is with reference to the Figures 3 and 4th explained in more detail below.

In addition, the sliding doors 2.1 and 2.2 each have two upper rollers 10 at their upper ends, the roller axes of which are aligned vertically. As from the Figure 4 As can be seen, the upper rollers 10 rest on a contact element 11 of the door frame 1, the upper rollers 10 being arranged in a recess 12 in the closed position of the associated sliding door.

The guide device 3 is in the Figures 2 and 3 shown in detail. The guide elements 6 are in this case designed as rails which have a parallel section 7 which runs parallel to the plane of the frame. In addition, the rails have a closing section 8 which is angled to the parallel section. The rail has a support surface 15 on its upper side.

The roller arrangement 4 attached to the sliding door 2 has a roller with a recess so that the recess area rests on the support surface 15 of the rail and the roller laterally overlaps the rail. During a movement along the rail, the roller rotates about a first roller axis 5. The roller is also rotatably mounted about a second roller axis 9. If the first sliding door 2.1 from the in Figure 2 open position shown in Figure 3 Transferred the closed position shown, the rotates Roll at any time around the first roll axis 5, whereby due to the rotatable mounting around the second roll axis 9, the roll aligns itself automatically at the transition from the parallel section 7 to the end section 8, so that the roller arrangement 9 does not increase resistance during the end movement on the end section 8 given is.

The support surface 15 is arranged with such an inclination that the sliding door 2 without further external forces due to gravity in the closed position according to FIG Figure 3 got.

Due to the angled alignment of the end section 8, the sliding door 2 is moved towards the door frame 1 shortly before reaching the closed position, whereby this closing movement is not hindered by the rollers due to the formation of the second roller axis 9, while a movement parallel (on the parallel section 8 ) to the frame level in the open position is possible without great effort.

How out Figure 5 As can be seen, a seal 13 is arranged between the sliding door 2 and a frame element 16 of the door frame 1. It can also be seen that a heater 17 is formed in the frame element 16, with which the sliding door 2 can be prevented from freezing to the door frame 1. In order to further increase the sealing, a magnetic element 14 is attached to the door frame 1, which magnet element pulls the sliding door 2 into the closed position, whereby the sealing effect of the seal 3 is increased.

List of reference symbols

1

Door frame

2.1, 2.2

sliding door

3

Guide device

4th

Roller arrangement

5

first roller axis

6th

Guide element

7th

Parallel section

8th

Final section

9

second roller axis

10

upper role

11th

Investment element

12th

deepening

13th

poetry

14th

Magnetic element

15th

Support surface

16

Frame element

17th

heater

Claims (15)

A sliding door assembly for a freezer cabinet, comprising - A door frame (1), the door frame (1) defining a frame plane, - At least one sliding door (2), the sliding door (2) being movable between an open position and a closed position along the plane of the frame, and - a guide device (3) for guiding the sliding door (2) between the open position and the closed position, the guide device (2) • Roller assemblies (4) each with a first roller axis (5) and • comprises at least one guide element (6) guiding the movement of the sliding door (2), characterized in that
the guide device (3) is designed in such a way that the sliding door (2) moves transversely to the frame plane when it moves from the open position into the closed position, for which purpose - The guide element (6) has a parallel section (7) arranged parallel to the plane of the frame and a final section (8) arranged transversely to the parallel section (7), and - The roller assemblies (4) each have at least one further roller axis (9) so that the roller assemblies (4) can accommodate a movement component both parallel to the parallel section (7) and transversely to it when moving along the guide element (6). Sliding door arrangement according to claim 1, wherein the first roller axis (5) is rotatable about the second roller axis (9) so that the roller arrangements (4) automatically move to the parallel section (7) and to the end section (8) when moving along the guide element (6) align. Sliding door arrangement according to claim 1 or 2, wherein the second roller axes (9) are aligned parallel to the frame plane. Sliding door arrangement according to one of the preceding claims, wherein the roller arrangements (4) are arranged on an underside of the sliding door (2). Sliding door arrangement according to Claim 4, the roller arrangements (4) resting on at least one guide rail designed as a guide element (6). Sliding door arrangement according to Claim 4 or 5, the sliding door (2) having at least one upper roller (10) with an immovably mounted roller axis in its upper region, the roller axis of the upper roller (10) being aligned in particular parallel to the plane of the frame. Sliding door arrangement according to claim 5 or 6, wherein the upper roller (10) rests against a contact element (11) during the movement between the open position and the closed position, the contact element having a recess (12) in which the upper roller (10) in the closed position is arranged. Sliding door arrangement according to one of the preceding claims, a seal (13) being arranged on the door frame (1) or the sliding door (2) which, in the closed position, seals the interior of the freezer from the environment. Sliding door arrangement according to one of the preceding claims, at least one magnetic element (14), by means of which the sliding door (2) is held in the closed position, is attached to the door frame (1) and / or to the sliding door (2). Sliding door arrangement according to Claims 8 and 9, the magnetic element (14) being arranged in such a way that the effect of the seal (13) is ensured or increased. Sliding door arrangement according to one of the preceding claims, wherein the guide device (3) is designed in such a way that the sliding door (2) automatically moves into the closed position from every open position. Sliding door arrangement according to claim 11, wherein the roller arrangements (4) rest on a support surface (15) having a slope, so that the sliding door (2) moves in the direction of the closed position without any further action of force due to gravity. Sliding door arrangement according to one of the preceding claims, wherein the door frame (2) has frame elements (16) made of plastic. Sliding door arrangement according to one of the preceding claims, wherein the door frame (2) comprises a heater (17). Freezer cabinet with a sliding door arrangement according to one of the preceding claims, wherein the freezer cabinet has a cooling unit for generating temperatures below minus 15 ° C.

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