EP3804602B1 - Hood-type industrial dishwasher with a device for balancing the movement of the hood - Google Patents

Hood-type industrial dishwasher with a device for balancing the movement of the hood Download PDF

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Publication number
EP3804602B1
EP3804602B1 EP19425072.6A EP19425072A EP3804602B1 EP 3804602 B1 EP3804602 B1 EP 3804602B1 EP 19425072 A EP19425072 A EP 19425072A EP 3804602 B1 EP3804602 B1 EP 3804602B1
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EP
European Patent Office
Prior art keywords
hood
pins
type industrial
lever
dishwasher according
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
EP19425072.6A
Other languages
German (de)
English (en)
French (fr)
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EP3804602A1 (en
Inventor
Andrea Ambrosi
Andrea Zinetti
Eros Pinaroli
Mauro Tosi
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.)
Bonferraro SpA
Original Assignee
Bonferraro SpA
Priority date (The priority date 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 date listed.)
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Publication date
Application filed by Bonferraro SpA filed Critical Bonferraro SpA
Priority to PL19425072.6T priority Critical patent/PL3804602T3/pl
Priority to EP19425072.6A priority patent/EP3804602B1/en
Publication of EP3804602A1 publication Critical patent/EP3804602A1/en
Application granted granted Critical
Publication of EP3804602B1 publication Critical patent/EP3804602B1/en
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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/0076—Washing or rinsing machines for crockery or tableware of non-domestic use type, e.g. commercial dishwashers for bars, hotels, restaurants, canteens or hospitals
    • A47L15/0081—Washing or rinsing machines for crockery or tableware of non-domestic use type, e.g. commercial dishwashers for bars, hotels, restaurants, canteens or hospitals with vertical sliding closing doors, e.g. hood-type dishwashers

Definitions

  • This invention concerns hood-type industrial dishwashers, and in particular a dishwasher equipped with a device for "balancing the movement” of the hood both during opening (lifting) and closing (lowering).
  • a hood-type industrial dishwasher essentially consists of a fixed base with a rear wall extending upwards and on which a hood is mounted through a handle and two side rods, so that the hood is vertically movable between a closed position where it rests on the base (during the operating cycle) and an open position where it is raised with respect to the base (for the loading/unloading of the dishes). Since an industrial dishwasher is used to wash many dishes, the hood is lifted and lowered by the operator many times during the day so it is important to have a "balanced" movement, typically obtained with levers and springs to counterbalance the weight of the hood, in order to reduce the effort required by the operator.
  • the handle is hinged on brackets fixed to the rear wall of the fixed base and is provided with rear levers inclined upwards to which the upper ends of balancing springs are attached, which at the lower ends are attached to the fixed base, the traction of the springs thus being greater the lower the hood is.
  • the balancing moment is given by the product of the force of the springs by their arm, i.e.
  • the purpose of this invention is therefore to provide a hood-type dishwasher that is free from said drawback.
  • This purpose is achieved by means of a hood-type dishwasher including connecting plates arranged between the springs and the levers and equipped with shaped slots, the levers being equipped with a plurality of pins that engage alternatively said shaped slots in a more forward or backward position on the connecting plates depending on the position of the hood, so as to obtain a hinge with variable arm.
  • the main advantage of this dishwasher is that it is able to achieve an optimal balancing of the hood throughout its stroke, both when opening and closing the hood, thus reducing the effort required by the operator.
  • the fact that it is possible to decide on the position of the pins and the shape of the slots allows to balance the weight of the hood at will, so not only perfectly balancing the weight of the hood but also being able to select a different balance in different stretches of the stroke. For example, it is possible to reduce the effect of the springs in the final stretch where the hood approaches the closure so that it closes autonomously by gravity, or to increase the effect of the springs when the hood approaches the complete opening to make it rise faster in the last stretch.
  • a second notable advantage of this dishwasher is the simple structure of the balancing device, which is economical to produce and install and requires no maintenance, since compared to the traditional solution it only requires the addition of pins on the levers and of connecting plates with one or more shaped slots.
  • Still another advantage stems from the fact that the force of each spring is transmitted through a plurality of pins and not just one pin or hook as in the traditional solution, improving the reliability of the dishwasher because even in the event of a breakage of one of the pins there is at least another one that can transmit the balancing moment.
  • a hood-type dishwasher traditionally includes a fixed base 1 with a rear wall la extending upwards and on which a hood 2 is mounted through a handle 3 and two side rods 14, so that hood 2 is vertically movable between a closed position where it rests on base 1 ( Fig.1A ) and an open position where it is raised with respect to base 1 ( Fig.1C ).
  • handle 3 rotates around a horizontal axis 4, being rotatably mounted on two brackets 5 fixed to the rear wall 1a, and it is provided with two rear levers 6 inclined upwards to which are connected the upper ends of two pulling springs 7 which at the lower end are attached to the fixed base 1. Consequently, the force F exerted by each spring 7 is all the greater the lower hood 2 is (i.e. F1>F2>F3).
  • the innovative aspect of this dishwasher lies in the fact that in the balancing device the connection between a lever 6 and the corresponding spring 7 is not direct, being made through a connecting plate 8 equipped with two shaped slots 9, 10 which are engaged by three pins 11, 12, 13 arranged on lever 6.
  • the backward first slot 9 extends downwards with an arcuate profile facing handle 3 and receives the backward first pin 11, which in the position of Fig.1A / 2A is abutting against the upper end 9a of slot 9, while the forward second slot 10 is shaped to have two top seats 10a, 10b where the intermediate second pin 12 ( Fig.1B / 2B ) and the forward third pin 13 ( Fig.1C / 2C ) respectively abut.
  • the first pin 11 is in abutment on the upper end 9a of the first slot 9 and acts as connection pin to transmit the force F1 of spring 7 to lever 6, and therefore to handle 3. Thanks to the backward position of said first pin 11, arm B1 of force F1 exerted by spring 7 is greater than in a prior art hinge, and therefore the balancing moment transmitted to handle 3 allows to reduce the effort of the operator in the initial phase of lifting hood 2 from the closed position. Note that in this position the other two pins 12, 13 are at the bottom of slot 10 and therefore do not transmit any force.
  • the second pin 12 remains in abutment on the first top seat 10a of the second slot 10 until the position shown in figure 2C is reached, when the rotation of lever 6 has brought the third pin 13 in abutment on the second top seat 10b.
  • the function of transmitting force F3 of spring 7 is performed by pin 13, which acts with a shorter arm B3 than pin 12, which moves away from the first top seat 10a of the second slot 10.
  • each lever 6 is preferably double being formed by two parallel parts, with pins 11, 12, 13 mounted between the two parts of the double lever passing through slots 9, 10 of the connecting plate 8.
  • pins 11, 12, 13 mounted between the two parts of the double lever passing through slots 9, 10 of the connecting plate 8.
  • these pins could also be cantilevered on one or both sides of a single lever 6 as shown below.
  • the connecting plate 8 instead of being monolithic, is made in two parts pivoted one to the other so that they can carry out a relative rotation in a vertical plane, namely an upper part 8a in which slots 9, 10 are formed and a lower part 8b to which the balancing spring 7 is connected. In this way, it is even possible to compensate for the slight bending of spring 7 that occurs when passing from the engagement of pin 12, which is aligned with the axis of spring 7, to the engagement of pin 11 or 13 ( Figs. 1A and 1C respectively).
  • a further variant of the connecting plate 8 consists in the fact that it is made up of three parts pivoted to each other, i.e. two identical upper parts 8a in which slots 9, 10 are formed and a lower part 8b to which the balancing spring 7 is connected.
  • lever 6 can be realized as a single lever with pins 11, 12, 13 arranged cantilevered on both sides of lever 6, as mentioned above.
  • the illustrated example shows two slots 9, 10 respectively engaged by a pin 11 and two pins 12, 13 there could be one slot for each pin or a single shaped slot with three seats for all pins, depending on the distances between the pins and the size of the cross-section of plate 8 (or its parts 8a, 8b). This also applies, of course, to the case where the number of pins is greater or smaller than the three pins shown in the example, with consequent adjustment of the number of slots.

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  • Washing And Drying Of Tableware (AREA)
EP19425072.6A 2019-10-10 2019-10-10 Hood-type industrial dishwasher with a device for balancing the movement of the hood Active EP3804602B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PL19425072.6T PL3804602T3 (pl) 2019-10-10 2019-10-10 Przemysłowa zmywarka typu kapturowego z urządzeniem do wyważania ruchu kaptura
EP19425072.6A EP3804602B1 (en) 2019-10-10 2019-10-10 Hood-type industrial dishwasher with a device for balancing the movement of the hood

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19425072.6A EP3804602B1 (en) 2019-10-10 2019-10-10 Hood-type industrial dishwasher with a device for balancing the movement of the hood

Publications (2)

Publication Number Publication Date
EP3804602A1 EP3804602A1 (en) 2021-04-14
EP3804602B1 true EP3804602B1 (en) 2022-06-08

Family

ID=69063669

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19425072.6A Active EP3804602B1 (en) 2019-10-10 2019-10-10 Hood-type industrial dishwasher with a device for balancing the movement of the hood

Country Status (2)

Country Link
EP (1) EP3804602B1 (pl)
PL (1) PL3804602T3 (pl)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006075385A1 (ja) * 2005-01-14 2006-07-20 Hoshizaki Denki Kabushiki Kaisha 食器洗浄機
KR101229032B1 (ko) * 2005-04-27 2013-02-04 호시자키 덴키 가부시키가이샤 식기 세척기

Also Published As

Publication number Publication date
PL3804602T3 (pl) 2022-10-10
EP3804602A1 (en) 2021-04-14

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