EP3090660A1 - Door assembly for refrigerated display case - Google Patents

Abstract

Showcase with means for cooling or keeping perishable foodstuffs, consisting of a bottom element (19) and a goods compartment (1) arranged above it, preferably made of glass surfaces, which contains at least one opening area, wherein at least one vertical or opposite to the vertical by a maximum of 45 ° inclined opening portion three mutually flatly arranged offset sliding door elements (2,3) containing a width of 1/3 to max. Have 1/2 the width of the area to be opened and each have at least one pair of rollers (5) via which the sliding door elements (2,3) on associated tracks (6) can be moved.

Description

The invention relates to a refrigerated display case for the presentation of goods, in particular refrigerated food. However, the invention is equally applicable to other showcases, e.g. Warming showcases applicable.

Such refrigerated display cases are used in railway stations, gas stations, refectories, coffee shops, bakeries, restaurants and other shops for the sale of chilled foods such as. Bakery and confectionery, snacks, and the like used.

Such a refrigerated display cabinet includes a generally viewable sales room with at least one goods receiving device, a cooling element and possibly a lighting device. The cooling element may be arranged in an insulated tub below the sales room so that air cooled by fans is passed over the goods receiving devices. The cooling element is usually connected to a refrigeration unit.

However, there are also cooling showcases known in which the cooling device is arranged laterally or above the sales room.

The sales area, preferably consisting of glass surfaces, included removal or loading areas in the form of doors, flaps or open sections. Refrigerated display cases in sales counters are usually designed in such a way that revolving doors or sliding doors are available on one of the operating pages for the loading of goods. In self-service showcases, removal flaps or open removal areas are also available on the customer side.

Since food trays or trays in Gastro-NormMaß (325 mm x 530 mm) or with bakery pies (400 mm x 600 mm) are often used in the food industry, the useful widths of the showcases are usually designed as accurately as possible to a multiple of these standard dimensions , The useful width should not be unnecessarily greater, since the then unpopulated areas are unattractive in the assortment of goods.

Such refrigerators are for example from the DE 20 2012 012 505 U1 , from the DE 10 2012 022 422 A1 and from the DE 100 48 612 A1 known.

In the DE 20 2012 012 505 U1 is a self-service refrigerated display case with rounded glass structure and several Warenauflageflächen shown. The refrigerated display case has a control side with revolving doors and a customer side with removal flaps. For small showcases with a usable width for two goods sheets, as shown here, usually hinged doors provided on the operating side. Sliding doors are hardly used in small showcase widths, as the maximum overlap width is always less than half the cabinet width and thus can not be found horizontally, especially in a size for two standard sheets, the standard plates by the necessary overlap of the two door elements and the handle area. Here, it would of course be possible to make the refrigerated display according to the opening loss by the overlap of the sliding doors and the loss of opening by the operating handle wider, so that the clear opening width corresponds to a standard sheet. As a result, the goods room is then no longer completely filled with goods, which on the one hand looks ugly and on the other hand reduces the floor space of the sales counter.

As usually the operating area behind the sales counter is usually very narrow with regard to a good space utilization, the open revolving doors protrude into this space.

In particular, when several sellers work behind the counter, disturbs the standing in the room door. Also can not be properly used by the door a storage space in front of the showcase, since when opening the doors here no plates o.ä. may be parked.

The in the DE 10 2012 022 422 A1 showcase is also equipped with hinged doors and therefore has the same problem.

The DE 100 48 612 A1 represents a refrigerated display case with oblique glass structure and several superimposed goods support surfaces. For removal of goods for each goods support surface on the operating side, a removal flap is present. The flap has the advantage that one level is accessible after opening the flap in full width. Here, even with short showcases always a simple assembly with standard plates is possible. Since the flap height is much lower than the height of the showcase, the disability is also much lower. However, even with this solution, a worktop in front of the showcase can not be used.

For self-service showcases with additional removal flaps on the customer side, however, this is a good solution.

In showcases, which are open on the sampling side or closed on the customer side service showcases, such a solution has disadvantages. Here it has been shown in practice that for different goods heights different distances of the intermediate floors are necessary for optimal utilization of the showcase. As a result, intermediate levels are generally height-adjustable for customer-open or customer-closed refrigerated display cases. For such refrigerated display cases, the goods with a flap after the DE 100 48 612 A1 not possible because the flap always has a fixed dimension.

In addition, here too is a work surface in front of the showcase, on which e.g. the plates could stand for the cake, not usable.

Showcases with a width of more than 2 standard sheets can be equipped with a sliding door, since in this case the opening width is greater than the width of the goods sheets. Solutions for sliding doors for this are eg from the DE 20 2011 052 121 U1 , of the US 6,745,813 B2 , of the US 5,301,468 and the GB 2 162 225 A known in different versions. Unfortunately, the problem can be solved with a refrigerated display case for a Nutzbereite of 2 mounting plates with none of these inventions.

The object of the invention is to make the opening area in a largely vertical plane of a refrigerated display case so that the opening area has a clear opening width of at least half the showcase width or half of an inner width of the goods space, in which no disturbing element in the open state Operating room protrudes, which is as simple as possible, easy and fast to open and which is as robust as possible in view of a high opening frequency for commercial use.

According to the invention, the opening region comprises three sliding door elements (2, 3) offset from one another in area, each having a width of 1/3 to a maximum of 1/2 of a clear width of the opening area and each having at least one pair of rollers (5) over which the Sliding door elements (2,3) on associated tracks (6) can be moved.

Hereby, the extensive task can be solved surprisingly easy. For opening, the three sliding door elements (2, 3), which are offset from each other in two areas, can be moved to one side, so that all three sliding door elements (2, 3) are arranged one behind the other. The clear opening width thus corresponds to at least half the showcase width or half the width of the goods space, whereby the standard sheets can be easily inserted or removed.

Conveniently, the sliding door elements are coupled together, wherein when moving one of the outer sliding doors, the middle sliding door element is moved.

It is easier to open and close the sliding door elements (2,3), if only the outer sliding door elements (2) have a handle (18) and the middle sliding door element (3) according to claim 2 is so coupled to the outer sliding door elements (2) or Interaction is that it is at least partially moved when moving an outer sliding door element (2). When opening this could e.g. a simple mechanical driver, wherein in the open state via a static friction or a magnetic force, the middle door is coupled to the outer door, so that when closing the outer door, the middle door to an end stop, which is arranged on each of the other outer sliding door is, is carried.

If the rollers (5) of the sliding door elements (2, 3) according to claim 3 are arranged in the upper area of the sliding door elements (2, 3), impurities such as e.g. Crumbs, do not block the rollers.

Particularly comfortable is the movement sequence when opening, if according to claim 4 in the upper region of the middle sliding door element (3) two deflecting elements (7) are arranged around which a flexible tension element (8) is annularly guided, wherein the outer sliding door elements (2) on opposite Positions of the annular tension element (8) with the tension element (8) are connected.

As a result, relative to the middle sliding door element (3), the two outer sliding doors (2) are always displaced synchronously relative to one another. However, since the force to open on one of the outer sliding doors (2) acts in the direction of the other sliding door (2), ultimately results in a uniform movement of the middle sliding door (3) in synchronism with the moving outer sliding door (2). There are no more shocks or blows, as would occur in a solution with a mechanical driver.

Particularly advantageously, the deflection elements (7) can be formed as rollers. The annular flexible tension member (8) may be formed as an annular wire rope or endlessly guided chain. Such a tension element is smooth and the production is relatively inexpensive.
A particularly compact design can be achieved according to claim 6, ie by arranging the guideways (6) for the outer sliding door element (2) at the upper portion of the showcase, wherein the middle sliding door element (3) runs on guideways (6), which on the two outer sliding door elements (2) are arranged.

As a result, a space is created now above the middle sliding door element (3) between the sliding door and showcase top, in which the flexible tension element (8) according to claim 4 or 5 can be mounted.

The sliding door elements have a better stability with respect to transverse forces, if at least one sliding door element (2,3) according to claim 7 in the lower region a guide element (9) which supports the sliding door element perpendicular to the surface of the sliding door elements (2,3).

If the rollers (5) of the sliding door elements (2,3) are too smooth, it is not possible to quickly close the sliding door elements (2,3), since the other outer sliding door element (2) then opened over the annular tension element (8) becomes. This can be according to claim 8, i. by a retaining element (10) which holds the outer sliding door element (2) in the closed position and is released by a force acting on the sliding door element (2) in the opening direction.

The retaining element (10) may e.g. according to claim 9 by a latching element which acts between an outer sliding door (2) and the showcase are formed.

Wear-free, the holding element (10) by a magnetic force acting between the outer sliding door (2) and the showcase, run. So it's just possible, for example

Magnet to be arranged on a lateral outer spar of the showcase and the counter-magnet on the associated outer sliding door element (2).

The guideways (6) for the sliding door elements (2,3) can be formed according to claim 10 by recessed elongated areas in which rollers (5) at least one sliding door element (2,3) are performed. As a result, the sliding door elements (2,3) are supported in the region of the rollers (5) with respect to forces acting transversely to the direction of movement.

But more advantageous is an embodiment according to claim 11, i. the guideway (6) contains a raised elongate region, on which the rollers (5) of a sliding door element (2, 3), which have a smaller diameter in the middle region than in the outer region, are guided. Abrasion of the rollers, dust and other impurities can not be deposited in the guideways.

In order to prevent that the sliding door element (2) can be torn from the guideway on the handle (18) of a sliding door element (2), it is advantageous to provide support elements (11) in the upper area of the sliding door elements (2, 3) according to claim 12, which act upwards.

The manufacturing tolerances can be greater if the support elements (11) according to claim 13 are adjustable in height.

Very inexpensively, the height adjustment of the support elements (11) can be produced when the support elements (11) according to claim 14, a bore (12) with internal thread (13), in which a largely cylindrical member (14) is screwed with external thread.

The opening area can be well prefabricated and set, if according to claim 15 a largely U-shaped profile element (20) with downwardly pointing legs on the downwardly pointing legs, the guideways (6) for the outer sliding door elements (2). Since the guideways (6) for the middle sliding door element (3) on the outer Sliding door elements (2) are arranged, the flexible ring element (8) above the middle sliding door element (3) is arranged and the support elements (11) can support against the inner surface of the U-profile (20), the opening area can be largely pre-assembled.

The drawings illustrate an embodiment particularly suitable for installation in counters.

Fig. 1:

Kühlvitrine mit geschlossenen Schiebetürelementen

Fig. 2:

Kühlvitrine mit nach links geschobenen Schiebetürelementen

Fig. 3:

Kühlvitrine mit nach rechts geschobenen Schiebetürelementen

Fig. 4:

Draufsicht auf die Schiebetürelemente

Fig. 5:

Schnitt durch die Führungen

Fig. 6:

Mittleres Schiebetürelement

Fig. 7:

Detail mittleres Schiebetürelement

Show it:

Fig. 1:

Refrigerated display case with closed sliding door elements

Fig. 2:

Refrigerated display case with sliding door elements pushed to the left

3:

Refrigerated display case with sliding door elements pushed to the right

4:

Top view of the sliding door elements

Fig. 5:

Cut through the guides

Fig. 6:

Middle sliding door element

Fig. 7:

Detail middle sliding door element

Fig. 1 shows the refrigerated display case with closed sliding door elements. The refrigerated display case consists of the cooling element (19) with the lower goods floor (4) and with the constructed goods space (1). The goods space (1) contains the intermediate floor (15) and the lighting device (16). Below the cooling element (19) the temperature control (17) is mounted. The cooling element is connected to a refrigeration unit, which is not shown here.

The area to be opened is closed by the two outer sliding door elements (2) and the middle sliding door element (3). The outer sliding door elements (2) are each provided with an actuating handle (18). Below, the outer sliding doors (2) comprise a guide element (9), via which the force acting on a perpendicular to the sliding door surface is absorbed.

Fig. 2 shows the same refrigerated display case with sliding to the left sliding door elements (2,3). All three sliding door elements are arranged one behind the other on the left side.

Fig. 3 shows the same refrigerated display cabinet with pushed to the right sliding door elements (2,3). All three sliding door elements are arranged one behind the other on the right side.

Fig. 4 shows the three sliding door elements (2,3) from above. The guides for the outer sliding door elements (2a, 2b) are not shown here. The middle sliding door element (3) contains above the deflecting elements (7a, 7b), which are designed as rollers. To these two rollers (7a, 7b), the flexible tension element (7), which consists of an annular wire rope, out.

The middle sliding door element has two rollers at the top (5c, 5d). The rear roller (5c) rides on a guideway fixed to the left outer sliding door member (2a), the front roller (5d) rides on a guideway fixed to the right rear sliding door member (2b).

Fig. 5 shows an enlarged section of the guideways. So that it does not become too confusing, the support elements (11) are not shown here.

The largely U-shaped element (20) contains the guide track (6a) for the front outer sliding door element (2a) and the guide track (6b) for the rear outer sliding door element (2b).

The middle sliding door member (3) hangs with the roller (5c) on the guide track (6c) which is fixed to the front outer sliding door member (2a).

With the roller (5d), the middle sliding door hangs on the guide track (6d) which is fixed to the rear outer sliding door member (2b).

At the middle sliding door element (3) above the deflecting elements (7) are attached. To the deflection elements (7), the flexible tension element (8) is guided.

Fig. 6 shows the middle sliding door element (3) again in detail. At the top of the sliding door a C-shaped sheet metal profile is mounted, which contains the rollers (7a, 7b) on the legs. To these roles, the wire rope (8) is guided in a ring. At the outermost points of the C-shaped sheet metal profile, the support elements (11a, 11b) are mounted on the legs. These consist of a hollow profile with an internal thread and a screwed there screw (14), which can be adjusted from below through the bore of the support element so that between the set screw (14) the U-shaped profile (20) only about 0.5 mm Air is. As a result, the sliding door element can not be accidentally lifted out of the guideway.

Fig. 7 shows how an outer sliding door element (2b) is connected to the wire rope (7) of the middle sliding door element (3). On the wire (8) for each outer sliding door element two sleeves are pressed at a distance of about 2 mm. The outer sliding door elements (2) each have a fold at the top with a slot through which the wire rope (8) is guided, wherein in each case via the two sleeves, the outer sliding door elements are coupled to the wire rope (8).
Since the outer right sliding door member (2b) is connected to the front side of the flexible pulling member (8) and the outer left sliding door member (2a) is connected to the rear side of the flexible pulling member (8), the two outer sliding door members (2) move. always opposite to the middle sliding door element (3).

LIST OF REFERENCE NUMBERS

1

goods space

2

outer sliding door elements

3

middle sliding door element

4

were ground

5

castors

6

guideway

7

deflecting

8th

flexible tension element

9

guide element

10

holding member

11

supporting

12

drilling

13

inner thread

14

Cylindrical component

15

mezzanine

16

lighting

17

control

18

Handle

19

cooling element

20

U-shaped profile

21

Connection tension element

Claims (15)

Showcase with means for cooling or keeping perishable foodstuffs, comprising a floor element (19) and a goods compartment (1) arranged above it, preferably made of glass surfaces, which contains at least one opening area, characterized in that at least one vertical or opposite to the vertical order a maximum of 45 ° inclined opening area three mutually flat offset arranged sliding door elements (2,3) containing a width of 1/3 to max. Have 1/2 a clear width of the opening portion and each have at least one pair of rollers (5), via which the sliding door elements (2,3) on associated tracks (6) can be moved. Showcase according to claim 1, characterized in that the sliding door elements (2,3) interact and when moving one of the outer sliding doors (2) the middle sliding door element (3) is at least partially moved along. Showcase according to one of the preceding claims, characterized in that the rollers (5) of the sliding door elements (2,3) in the upper region of the sliding door elements (2,3) are arranged. Showcase according to one of the preceding claims, characterized in that in the upper region of the middle sliding door element (3) at least two deflecting elements (7) are arranged, around which a flexible tension element (8) is annularly guided, wherein the outer sliding door elements (2) on opposite Positions of the annular tension element (8) with the tension element (8) are connected. Showcase according to claim 4, characterized in that the deflection elements (7) are designed as rollers, wherein the flexible tension element (8) may be formed as an annular wire rope or endlessly circulating guided chain. Showcase according to one of the preceding claims, characterized in that the guideways (6) for the outer sliding door elements (2) are arranged at the upper area of the showcase and that the middle sliding door element (3) contains two associated guideways (6) which are connected to the two outer sliding door elements (2) are arranged. Showcases according to one of the preceding claims, characterized in that at least one sliding door element (2,3) in the lower region includes a guide element (9) which supports the sliding door element (2,3) perpendicular to the surface of the sliding door element (2,3). Showcase according to one of the preceding claims, characterized in that the outer sliding door elements (2) in the closed position via a holding element (10) are held, wherein the holding element (10) by acting in an opening direction of the sliding door elements (2,3) Power is released. Showcase according to claim 8, characterized in that the holding element (10) by a latching element which acts between an outer sliding door (2) and the showcase, is formed. Showcase according to one of the preceding claims, characterized in that at least one guide track (6) is formed by recessed elongated areas in which rollers (5) at least one sliding door element (2,3) are guided. Showcases according to one of the preceding claims, characterized in that at least one guide track (6) includes a raised elongated area on which the rollers (6) of a sliding door element (2,3), which have a smaller diameter in the central region than in the outer region be guided. Showcase according to claim 10 or 11, characterized in that at least one sliding door element (2,3) in the upper region upwardly acting support elements (11). Showcase according to claim 12, characterized in that the support elements (11) are adjustable in height. Showcase according to claim 12 or 13, characterized in that the support elements (11) have at least one bore (12) with internal thread (13) and a screw-in largely cylindrical component (14) with external thread. Showcase according to one of the preceding claims, characterized in that a largely U-shaped profile element (20) with downwardly pointing legs on the downwardly pointing legs, the guideways (6) for the outer sliding door elements (2).

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