EP2868236B1 - Abdeckung für Kühlschränke - Google Patents

Abdeckung für Kühlschränke Download PDF

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Publication number
EP2868236B1
EP2868236B1 EP14186742.4A EP14186742A EP2868236B1 EP 2868236 B1 EP2868236 B1 EP 2868236B1 EP 14186742 A EP14186742 A EP 14186742A EP 2868236 B1 EP2868236 B1 EP 2868236B1
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EP
European Patent Office
Prior art keywords
winding roller
transmission belts
draw bar
flexible screen
fixed
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP14186742.4A
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English (en)
French (fr)
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EP2868236A2 (de
EP2868236A3 (de
Inventor
Fabrizio Rami
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Officine Rami Srl
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Officine Rami Srl
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Priority to PL14186742T priority Critical patent/PL2868236T3/pl
Publication of EP2868236A2 publication Critical patent/EP2868236A2/de
Publication of EP2868236A3 publication Critical patent/EP2868236A3/de
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Publication of EP2868236B1 publication Critical patent/EP2868236B1/de
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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47F—SPECIAL FURNITURE, FITTINGS, OR ACCESSORIES FOR SHOPS, STOREHOUSES, BARS, RESTAURANTS OR THE LIKE; PAYING COUNTERS
    • A47F3/00—Show cases or show cabinets
    • A47F3/04—Show cases or show cabinets air-conditioned, refrigerated
    • A47F3/0439—Cases or cabinets of the open type
    • A47F3/0469—Details, e.g. night covers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D23/00—General constructional features
    • F25D23/02—Doors; Covers
    • F25D23/026—Doors; Covers for open-top cabinets

Definitions

  • the present invention relates to a screening device for refrigerator cabinets, in particular for refrigerator cabinets commonly used for displaying and conserving perishable goods internally of supermarkets or other commercial enterprises.
  • a refrigerator cabinet generally comprises an external casing, substantially conformed as a tub, which is rested on a floor surface and delimits internally thereof a refrigerator compartment able to contain the products to be conserved.
  • the top of this external casing is provided with a large opening having a horizontal lie, through which the potential buyers can see and collect the products from the refrigerator compartment.
  • This opening is typically not provided with any closing element and is therefore the cause of a high thermal exchange between the refrigerator compartment and the external environment, which leads to a high energy cost for lowering and maintaining the temperature of the refrigerator compartment to the levels required for conserving the products.
  • One way of responding to this request is to use rigid closing panels, preferably made of a transparent material which can slide on one another in such a way as to enable a partial opening of the various zones of the refrigerator cabinet.
  • a further possibility for enabling closure of a refrigerator cabinet is using a rollable heat-insulating screen, similar to those already used in some vertically-opening refrigerator cabinets.
  • the heat-insulating screen is in fact a flexible cloth which generally exhibits an end edge fixed to a winding roller and an opposite free edge fixed to a bar-handle.
  • the winding roller is installed horizontally above the opening to be screen where it can be made to rotate about the central axis thereof, manually or motorized, causing the unwinding or the re-winding of the heat-insulating screen. Thanks to the weight of the bar-handle, the insulating screen is maintained vertical at all times and can therefore be lowered so as to screen the opening or raised to make it newly accessible.
  • Such screening devices are disclosed for example in DE 3128286 A1 and US5287908 .
  • An aim of the present invention is therefore to provide a movement system which enables unwinding and re-winding a flexible screen from/onto a winding roller, even in a case in which it is to be used for screening horizontally-lying openings.
  • a further aim of the present invention is to attain the above-mentioned objective with a solution that is simple, rational and as inexpensive as possible.
  • an embodiment of the present invention discloses a screening device for refrigerator cabinets comprising a winding roller able to rotate on itself about a central axis thereof and a flexible screen having a free and an opposite end fixed to the winding roller, two transmission belts, each of which is wound about at least a first pulley and a second pulley in such a way as to develop in a closed pathway which comprises a straight operating portion which is parallel to an operating portion of the other transmission belt, a draw bar fixed to the free end of the flexible screen and having ends thereof fixed to the two transmission belts at respective operating portions, and activating means for simultaneously rotating the pulleys of both the transmission belts.
  • the draw bar located at the free end of the flexible screen is not engaged to slide by gravitational effect like the chain-bars of the prior art, but is engaged to slide actively by the transmission belts.
  • This active movement of the draw bar can therefore guide the flexible screen to slide on any predetermined plane, even on a horizontal plane of a refrigerator cabinet.
  • the activating means of the pulleys can be manual or motorized.
  • the activating means can preferably comprise at least an electric motor.
  • the electric motor can preferably be connected to and commanded by a proximity sensor, in such a way that the system is completely automatic with no need for buttons.
  • first and the second pulleys of the transmission belts are coaxial to one another.
  • the first pulleys of the transmission belts are kinematically connected by a transmission shaft.
  • the transmission shaft is the winding roller.
  • the activating of the transmission belts causes not only the translation of the draw bar but also the activation in rotation of the winding roller, i.e. the unwinding or winding of the flexible screen.
  • the first pulleys of the transmission belts can be coaxially splined directly on opposite ends of the winding roller.
  • This solution has the advantage of considerably simplifying the kinematics of the system and containing dimensions and costs to a minimum.
  • the free end of the screen is fixed to the draw bar by means of a second winding roller, which second winding roller is rotatably coupled to the draw bar and is associated to spring means able to rotate the second winding roller about a central axis thereof.
  • This second winding roller has the advantage of maintaining the flexible screen constantly stretched, thus compensating for any small differences between the linear displacement of the draw bar and the linear quantity of flexible screen which unwinds or rewinds from/onto the first winding roller.
  • the device can further comprise two straight guides that are parallel to the operating portions of the transmission belts, a skate being slidably coupled to each transmission belt, which skate is fixed to the draw bar.
  • skates might be replaced by carriages provided with wheels able to run on the guides.
  • the device can further comprise a covering frame conformed substantially as a border, which is able to cover the transmission belts and the winding roller, defining an opening in which the draw bar and the flexible screen slide.
  • the covering frame can be applied on the external side of the refrigerator cabinet or any other refrigerator compartment to be screened, hiding the mechanism of the device and thus improving both the aesthetic appeal and the safety of the whole system.
  • the flexible screen can be a perforated screen made of a plastic material.
  • the flexible screen can represent an effective thermal barrier between the refrigerator compartment and the external environment, and can further guarantee a certain ventilation which prevents formation of condensation.
  • the figures illustrate a screening device 100 conceived to be applied to a refrigerator cabinet (not illustrated), but which might be advantageously applied also to other refrigerator compartments, among which for example vertically-opening refrigerator cabinets or also to some masonry refrigerator cells in which a temperature to be maintained is not excessively low (for example comprised between 0°C and 7°C).
  • This screening device 100 comprises a winding roller 105 the opposite ends of which are rotatably coupled to respective supports 110 and 115, such that the winding roller 105 can rotate on itself about the central axis X thereof.
  • the screening device 100 further comprises two transmission belts 120 and 125, which are positioned on opposite sides with respect to the winding roller 105.
  • the transmission belt 120 is wound about a first pulley 130 and a second pulley 135, such as to develop in a closed pathway which substantially comprises two straight portions, of which a rear portion 140 and a front portion 145 ( figures 2 and 3 ).
  • the pulley 130 is coaxially splined directly to an end of the winding roller 105, while the pulley 135 is rotatably coupled to a distal support 150, which is positioned in such a way that the pulley 135 is aligned to the first pulley 130 along a substantially perpendicular direction to the central axis X of the winding roller 105.
  • the transmission belt 125 is wound about a first pulley 155 and a second pulley 160, so as to develop in a closed pathway which substantially comprises two straight portions, of which a rear portion 165 and a front portion 170 (see figures 4 and 5 ).
  • the pulley 155 is coaxially splined directly to the end of the winding roller 105, opposite with respect to the pulley 130, while the pulley 160 is rotatably coupled to a distal support 175, which is positioned in such a way that the pulley 160 is coaxial to the pulley 135 and perfectly aligned to the pulley 155 along a substantially perpendicular direction to the central axis X of the winding roller 105.
  • the pulleys 130, 135, 155 and 160 all have the same diameter, so that the rear portions 140 and 165 of the two transmission belts 120 and 125 are perfectly parallel and coplanar to one another.
  • the same result might be obtained using pulleys 135 and 160 with an equal diameter to one another but different to the diameter of the pulleys 130 and 155.
  • the screening device 100 can also comprise two belt-presser wheels 180 and 185, which are rotatably mounted idle on respective supports 190 and 195, and are able to rotate while pressing in contact respectively with the front portion 145 of the belt 120 and the front portion 170 of the belt 125.
  • the screening device 100 further comprises a draw bar 200, which is orientated parallel to the winding roller 105 and exhibits the opposite ends solidly fixed with respect to the rear portion 140 of the transmission belt 120 and the rear portion 165 of the transmission belt 125.
  • each of the ends can be obtained by vice-clamping the lower portion of the respective transmission belt between two metal straps, of which a first metal strap is fixed to the draw bar 200 while the second metal strap is fixed to the first metal strap for example by means of screws.
  • skates 210 and 215 are also fixed to the opposite ends of the draw bar 200, each of which skates 210 and 215 is slidably housed in a respective straight guide 220 and 225 with which it substantially realises a sliding coupling with a single degree of freedom.
  • the straight guides 220 and 225 are borne by respective support brackets 230 and 235, in such a way as to be substantially parallel to the rear portions 140 and 16 of the transmission belts 120 and 125.
  • skates 210 and 215 might be replaced by carriages provided with wheels able to roll along the straight guides 220 and 225.
  • the screening device 100 further comprises a flexible screen 240, which is able to function as a heat-insulating barrier between the refrigerated compartment of the refrigerator cabinet and the external environment.
  • the flexible screen 240 is substantially conformed as a rectangular canvas having two pairs of opposite edges, of which a pair of lateral edges which, in the illustrated example, correspond to the longer sides of the canvas, and a pair of end edges which, once more in the illustrated example, correspond to the shorter sides.
  • a first of these end edges of the flexible screen 240 is fixed in a longitudinal direction to the draw bar 200 while the second opposite edge is fixed longitudinally to the winding roller 105, in such a way that the flexible screen 240 can be wound and unwound onto/from the winding roller 105 following the rotation thereof about the central axis X thereof in a direction or in the opposite direction.
  • the flexible screen 240 can be made of a plastic material, for example PVC, can be transparent and can further be perforated, so as to enable an adequate ventilation able to prevent formation of condensation.
  • a plastic material for example PVC
  • the screening device 100 lastly comprises an electric motor 245, for example a step motor, the drive shaft whereof is coaxial to and directly splined on an end of the winding roller 105.
  • an electric motor 245 for example a step motor
  • the electric motor can be connected to and commanded by a proximity sensor, so that it is not necessary to include any type of activating button, making the system completely automatic.
  • the winding roller 105 can be set in rotation in the unwinding direction of the flexible screen 240.
  • the activation also sets the transmission belts 120 and 125 in movement, which engage the draw bar 200 to translate parallel to itself distancingly from the winding roller 105, also guided by the skates 210 and 215 which slide in the straight guides 220 and 225. In this way, the flexible screen 240 which unwinds from the winding roller 105 is progressively stretched along the translation plane of the draw bar 200.
  • the winding roller 105 can be set in rotation in the winding direction of the flexible screen 240.
  • This activation also inverts the movement of the transmission belts 120 and 125, which engage the draw bar 200 to translate parallel to itself nearingly from the winding roller 105, still guided also by the skates 210 and 215 which slide in the straight guides 220 and 225.
  • the flexible screen 240 retreats on the translation plane of the draw bar 200 and winds progressively on the winding roller 105.
  • the flexible screen 240 preferably remains always stretched on the translation plane of the draw bar 200.
  • the diameter of the pulleys 130 and 155 is chosen to be substantially identical to the diameter of the winding roller 105, in such a way that the linear velocity of the transmission belts 120 and 125, i.e. of the draw bar 200, is substantially identical to the winding or unwinding velocity of the flexible screen 240.
  • the draw bar 200 might be equipped with a second winding roller 250 and first end of the flexible screen 240 might be directly fixed longitudinally to the second winding roller 250 (see figure 8 ).
  • This second winding roller 250 is parallel to the first winding roller 105 and is rotatably mounted on the draw bar 200, so as to be constrained to translate solidly therewith following the movement of the transmission belts 120 and 125 but also to be able to rotate freely about the central axis thereof.
  • the second winding roller 250 is further provided with appropriate pre-loaded spring means (not illustrated as of known type to the expert in the sector), which tend to rotate the second winding roller 250 in a predetermined direction and therefore wind the flexible screen 240 thereon.
  • the screening device 100 can lastly be provided with a covering frame, denoted in its entirety by 255, which is destined to be always positioned on the external side of the refrigerating cabinet, so as to hide the mechanical parts of the device.
  • the covering frame 255 can for example be realised by means of four profiled sheet steel elements, which are fixed to one another in such a way as to realize a substantially rectangular frame, which covers the winding roller 105, the transmission belts 120 and 125 with the relative pulleys, as well as the straight guides 220 and 225.
  • the covering frame 255 also defines a central opening in which the draw bar 200 slides and which is thus opened and closed by the flexible screen 240.
  • Perimeter brushes 260 can also be fixed to the covering frame 255, which brushes 260 are arranged along the sides of the central opening, so as to be able to remain substantially in contact with the flexible screen 240 in the closed position, mainly so as to protect the various mechanical parts from dust.
  • the covering frame 255 also functions as a support structure to which all the single supports for the winding roller 105, the pulleys of the transmission belts 120 and 125 and the straight guides 220 and 225 are also fixed.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Refrigerator Housings (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)

Claims (7)

  1. Abschirmvorrichtung (100) für Kühlfächer, eine Wickelwalze (105) umfassend, die in der Lage ist, sich selbst um ihre Mittelachse (X) zu drehen, und eine flexible Abschirmung (240), die ein freies und ein entgegengesetztes, an der Wickelwalze (105) befestigtes Ende aufweist, zwei Treibriemen (120, 125), von denen jeder derart über mindestens eine erste Rolle (130, 155) und eine zweite Rolle (135, 160) läuft, dass eine geschlossene Bahn entsteht, die einen gerade verlaufenden Betriebsabschnitt (140, 165) umfasst, der parallel zu einem Betriebsabschnitt des anderen Treibriemens liegt, und eine Zugstange (200), die am freien Ende der flexiblen Abschirmung (240) befestigt ist und zwei Enden aufweist, die an den zwei Treibriemen (120, 125) an entsprechenden Betriebsabschnitten (140, 165) befestigt sind, und Betätigungsmittel (245) zum gleichzeitigen Drehen der Rollen beider Treibriemen (120, 125), wobei die ersten Rollen (130, 155) der Treibriemen (120, 125) durch die Wickelwalze (105) kinematisch verbunden sind, dadurch gekennzeichnet, dass das freie Ende der flexiblen Abschirmung (240) mit Hilfe einer zweiten Wickelwalze (250) an der Zugstange (200) befestigt ist, wobei die zweite Wickelwalze (250) drehbar mit der Zugstange (200) gekoppelt und einem Federmittel zugeordnet ist, das in der Lage ist, die zweite Wickelwalze (250) um deren Mittelachse zu drehen.
  2. Vorrichtung (100) nach Anspruch 1, dadurch gekennzeichnet, dass die Betätigungsmittel mindestens einen Elektromotor (245) umfassen.
  3. Vorrichtung (100) nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die ersten Rollen (130, 155) und die zweiten Rollen (135, 160) der Treibriemen (120, 125) koaxial zueinander liegen.
  4. Vorrichtung (100) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die ersten Rollen (130, 155) der Treibriemen (120, 125) an entgegengesetzten Enden der Wickelwalze (105) direkt koaxial kerbverzahnt sind.
  5. Vorrichtung (100) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass sie zwei gerade Führungen (220, 225) umfasst, die parallel zu den Betriebsabschnitten (140, 165) der Treibriemen (120, 125) liegen, wobei ein Gleitstück gleitfähig an jeden Treibriemen (120, 125) gekoppelt ist, wobei das Gleitstück (210, 215) an der Zugstange (200) befestigt ist.
  6. Vorrichtung (100) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass sie einen Rahmen (255) umfasst, der im Wesentlichen als eine Begrenzung gebildet und in der Lage ist, die Treibriemen (120, 125) und die Wickelrolle (105) zu bedecken, und eine Öffnung definiert, in welcher die Zugstange (200) und die flexible Abschirmung (240) gleiten.
  7. Vorrichtung (100) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die flexible Abschirmung (240) eine perforierte Abschirmung ist, die aus einem Kunststoff besteht.
EP14186742.4A 2013-10-01 2014-09-29 Abdeckung für Kühlschränke Active EP2868236B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL14186742T PL2868236T3 (pl) 2013-10-01 2014-09-29 Osłona dla szaf chłodniczych

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT000071A ITRE20130071A1 (it) 2013-10-01 2013-10-01 Dispositivo di schermatura per vani refrigerati

Publications (3)

Publication Number Publication Date
EP2868236A2 EP2868236A2 (de) 2015-05-06
EP2868236A3 EP2868236A3 (de) 2015-07-01
EP2868236B1 true EP2868236B1 (de) 2016-11-02

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP14186742.4A Active EP2868236B1 (de) 2013-10-01 2014-09-29 Abdeckung für Kühlschränke

Country Status (4)

Country Link
EP (1) EP2868236B1 (de)
ES (1) ES2612546T3 (de)
IT (1) ITRE20130071A1 (de)
PL (1) PL2868236T3 (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108937386A (zh) * 2018-07-27 2018-12-07 黄山豪泰塑胶有限公司 Pvc装饰材料膜展架
CN111387765A (zh) * 2020-03-28 2020-07-10 席宏榕 一种物流货物放置装置
CN111880691B (zh) * 2020-06-19 2022-05-17 维沃移动通信有限公司 屏幕显示方法、装置和电子设备

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3128286A1 (de) * 1981-07-17 1983-02-03 Jörg 7344 Gingen Tesmer Nachtabdeckung fuer eine kuehlinsel
DE9013749U1 (de) * 1990-10-03 1992-04-16 Geta Gesellschaft Fuer Energietechnik Und -Anwendung Mbh, 5342 Rheinbreitbach, De
US5287908A (en) * 1991-12-19 1994-02-22 Hunter Douglas Inc. Window covering assembly
DE102004006101A1 (de) * 2004-02-06 2005-09-01 Linde Kältetechnik GmbH & Co. KG Kühlmöbel mit Nachtabdeckung

Also Published As

Publication number Publication date
PL2868236T3 (pl) 2017-04-28
ITRE20130071A1 (it) 2015-04-02
EP2868236A2 (de) 2015-05-06
EP2868236A3 (de) 2015-07-01
ES2612546T3 (es) 2017-05-17

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