EP0578862A1 - A safety device for a dishwasher for canteens - Google Patents
A safety device for a dishwasher for canteens Download PDFInfo
- Publication number
- EP0578862A1 EP0578862A1 EP19920112275 EP92112275A EP0578862A1 EP 0578862 A1 EP0578862 A1 EP 0578862A1 EP 19920112275 EP19920112275 EP 19920112275 EP 92112275 A EP92112275 A EP 92112275A EP 0578862 A1 EP0578862 A1 EP 0578862A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- rod
- tank
- vertical
- spring
- protective cover
- 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.)
- Granted
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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
Abstract
Description
- The present invention relates to a safety device for a dishwasher, in particular for canteens, provided with a vertically sliding cover having a spring balance system, said device being coupled with the cover for preventing it from dropping undesirably when moved into its raised position in case of accidental breakdowns of the spring system.
- Dishwashers, in particular dishwashers for canteens, are known which comprise a large-capacity washing tank in which the spray arms and all the mechanical and electric components of the dish washing system are mounted, the tank being provided at the back with two vertical columns extending upward beyond the upper outer edge of the tank, and also comprising a protective cover fitting on the tank and provided at the back with two elongate vertical runners extending downward from the lower outer edge of the cover, the runners sliding vertically along the vertical columns of the tank so as to be able to move the protective cover from a lowered working position in which the cover rests on the tank so as to cover it, thus permitting the washing of the dishes introduced into the tank, to a raised idle position in which the cover is raised vertically from the tank to permit access to the inside of the tank for removing the dishes already washed and introducing others to be washed.
- To permit the protective cover to be raised from and lowered onto the tank, every dishwasher of this type is furthermore provided with a spring balance system comprising at least one pull spring engaged at each end with a bracket fixed to the back of the tank along one of its vertical columns, and with a rigid rod jointed along the same column in which the bracket is fixed, in a position below the bracket, the rod being connected via an elongate tie rod with a horizontal crosspiece fixed at the back against the vertical runners of the protective cover. This balance system is dimensioned in such a way that when the protective cover is moved into its lowered working position the cover is maintained in this position under the action of its weight, and when the cover is moved into its raised idle position it is maintained in this position by the force of the pull spring that exceeds the action of the weight of the cover.
- Although it ensures efficient operation the spring balance system in question does not meet absolute safety conditions, particularly when the protective cover is moved into its raised position, since if the spring breaks accidentally or the system functions deficiently the contrast action adapted to keep the protective cover raised is lacking, so that the cover can drop undesirably and therefore endanger the users of these dishwashers.
- The present invention is based on the problem of eliminating these disadvantages by means of a safety device coupled with the protective cover of the machine that permits the cover to be raised and lowered and prevents it from dropping from its raised position in case of accidental breakage or deficient operation of the above-described spring balance system.
- This safety device is realized with the constructional features substantially described, with particular reference to the adjoined claims of the patent.
- The invention will be better understood from the following description, intended to be merely exemplary and nonrestrictive, and with reference to the adjoined drawings in which:
- Fig. 1 shows a perspective view of a dishwasher provided with the safety device according to the invention;
- Figs. 2 and 3 show a lateral sectional view of the part of the machine of Fig. 1 in which the abovementioned safety device is mounted, said device being moved into two different operating positions.
- Fig. 1 illustrates schematically a dishwasher 4 for canteens incorporating
safety device 5 according to the invention. - As apparent from this figure, the machine substantially comprises a large-
capacity tank 6 for containing the dishes to be washed and in which the spray arms, the recirculating pump and the pump for draining the washing liquid as well as all the mechanical and electric components of the washing system of the machine (that are not represented in the figure) are mounted, the tank being provided on the bottom with fourfeet 7 for supporting it on the floor. The machine furthermore comprises aprotective cover 8 disposed so as to fit ontank 6. In particular,tank 6 is provided at the back with twovertical columns 9 formed by corresponding L-shaped sections that are applied laterally to the tank and extend upward by the same height beyond upperouter edge 10 of the tank. - In its turn,
protective cover 8 is provided at the back with twovertical runners 11 formed by corresponding L-shaped sections that are applied laterally to the cover and extend downward by the same length beyond lowerouter edge 12 of the cover. The runners are joined together via ahorizontal crosspiece 13 fixed to the back thereof and fit correspondingvertical columns 9 of the tank. - Thus, when
protective cover 8 is mounted ontank 6vertical runners 11 of the cover engagevertical columns 9 of the tank, thus permitting the cover to slide vertically from a lowered working position, in which it rests ontank 6 so as to cover it during the washing of the dishes introduced into the tank, to a raised idle position, shown in Fig. 1, in which the cover is raised vertically from the tank to permit access to its interior for removing the dishes already washed and introducing others to be washed. - As usual, the dishwasher is provided with a
spring balance system 14 forprotective cover 8 adapted to permit the cover to be raised from and lowered onto the tank and substantially comprising at least onespring 15, preferably a pull spring, a straightrigid rod 16 and astraight tie rod 17. - In particular,
pull spring 15 respectively engages with its hook-shaped ends 18 and 19 ahook 20 provided with a verticalelongate rod 21 supported by arigid bracket 22 fixed against the inside surface of one ofvertical columns 9 oftank 6, and ahook 23 protruding from the central zone ofrigid rod 16. In its turn the rigid rod is pivoted with itsend 24 against the inside surface of thesame column 9 in whichbracket 22 is fixed, in a position below the bracket, and jointed with its other,free end 25 withlower end part 26 oftie rod 17. - This
tie rod 17 is furthermore connected in jointed fashion with itsupper end part 27 with the outer back surface ofhorizontal crosspiece 13. - Thus, with expedient dimensioning of the tension of
spring 15 and the moments generated by the lever system consisting ofstraight rod 16 andstraight tie rod 17, it is possible to balance the weight ofprotective cover 8 when it is moved into its lowered working position and maintained in this position under the action of its weight, and it is furthermore possible to move this protective cover toward its raised idle position, maintaining it in this position with a force exceeding that exerted by the weight of the cover. Referring now to Figs. 2 and 3, one sees the safety device according to the invention substantially comprising anelongate rod 28 adapted to slide horizontally and inserted through abush 29 inserted into a throughhole 30 formed inlateral wall 31 of the section constitutingvertical column 9 in correspondence with the position in whichbracket 22 is fixed, the elongate rod being provided with a hook-shaped end 32 that engageselongate rod 21 ofhook 20, and with afree end 33 that can be inserted within corresponding throughholes 34 formed in the vertical direction alonglateral wall 35 ofvertical runner 11 of the protective cover, which is disposed adjacentvertical column 9 under consideration. In its turn,elongate rod 21 is threaded on the outside to permit threenuts Nut 36 is applied on the upper part of verticalelongate rod 21 and furthermore rests on planeupper surface 39 ofbracket 22, thus acting as a support for thisvertical rod 21 and permitting it to oscillate to a limited degree through an arc along a vertical plane, in the way described below.Nuts hook 32, thus limiting any lateral excursions of this hook and of connectedelongate rod 28 with respect to its horizontal sliding plane, wherenut 37 is furthermore applied close to the plane lower surface (not indicated in the figure) ofbracket 22 opposite abovementionedupper surface 39 and serves to limit any vertical raising ofrod 21 during operation of the machine since it hits against the plane lower surface. - The present safety device furthermore comprises at least one
spring 40, preferably a compression spring, whose hook-shaped ends 41 and 42 are respectively connected withhook 20 ofvertical rod 21 and with acorresponding seat 43 formed along the inside surface ofvertical column 9 in whichbracket 22 is fixed, in a position belowhorizontal rod 28 previously described. - In particular, this
spring 40 is loaded so as to urgevertical rod 21 to move in the direction indicated by arrow A, along an arc in a vertical plane, in which state this vertical rod urgeshook 32 and connectedhorizontal rod 28 to move in direction B, identical to A, thus maintainingfree end 33 of the horizontal rod in light contact with the opposite inside surface oflateral wall 35 ofvertical runner 11 ofprotective cover 8. Still examining Fig. 2, one can see that whenprotective cover 8 is raised fromtank 6,end 33 of the horizontal rod is always kept away from corresponding throughhole 34 inlateral wall 35 formed in a position opposite this end, thanks to the action ofspring balance system 14 that exceeds that ofspring 40. Conversely, Fig. 3 represents the state assumed by the components in the case of accidental breakage ofspring 15 or deficient operation ofbalance system 14. In this state lacking the contrast action ofspring 15,horizontal rod 28 is driven byspring 40 such that itsend 33 penetrates one ofholes 34, thus locking togethervertical column 9 oftank 6 and correspondingvertical runner 11 ofprotective cover 8 and preventing any mutual displacement so thatprotective cover 8 cannot drop from this raised position. To releasehorizontal rod 28 fromvertical runner 11 in order to moveprotective cover 8 into another operating position, it is sufficient to move this horizontal rod manually so as to disengage it from corresponding throughhole 34 and returnprotective cover 8 to the lowered working position. - It is therefore evident that the safety device according to the invention is realized and functions in a simple way and reliably prevents the protective cover from dropping from its raised position if the above-described functional difficulties should occur, thus excluding any danger for the users of these dishwashers.
Claims (4)
- A safety device for a dishwasher, in particular for canteens, comprising a tank for washing the dishes provided with spray arms and the various mechanical and electric components of the dish washing system and also having a protective cover fitting on the tank and adapted to move vertically from a lowered working position to a raised idle position in which the protective cover rests on and is raised from the tank, respectively, the tank being provided at the back and laterally with two vertical columns extending upward by the same height beyond the upper outer edge of the tank, and the protective cover being provided at the back and laterally with two vertical runners extending downward by the same length beyond the lower outer edge of the cover, the runners slidingly engaging the corresponding columns when the protective cover is mounted on the tank, the machine furthermore comprising a spring balance system for the protective cover adapted to permit the cover to be raised from and lowered onto the tank and substantially comprising at least one spring, a rigid rod and a straight tie rod, the spring respectively engaging with its ends a hook provided with a vertical elongate rod supported by a rigid bracket fixed against one of the columns, and the central zone of the rigid rod, and the rigid rod being respectively pivoted with its ends with the vertical column in a position below the bracket, and with the lower end part of the tie rod, its upper end part being jointed with a crosspiece fixed to the back of the protective cover, characterized in that it comprises at least one sliding element (28) cooperating with the vertical rod (21) and urged by at least one spring (40) or similar elastic means so as to engage the vertical column (9) and the corresponding vertical runner (11) only when the protective cover (8) is raised from the tank (6) in case of accidental breakage of the spring (15) or deficient functioning of the spring balance system (14).
- The safety device of claim 1, characterized in that the sliding element comprises a horizontally sliding elongate rod (28) inserted through a bush (29) or the like inserted into a through hole (30) in the lateral wall (31) of the vertical column (9), in correspondence with the position in which the bracket (22) is fixed, the horizontal rod (28) being provided with a hook-shaped end (32) engaging the vertical rod (21) and with a free end (33) insertable through corresponding through holes (34) formed in the vertical direction along the lateral wall (35) of the relevant vertical runner (11).
- The safety device of claim 2, characterized in that the spring (40) is preferably embodied by a compression spring provided with hook-shaped ends (41, 42) respectively connected with the hook (20) of the vertical rod (21) and with a corresponding seat (43) of the vertical column (9) in a position below the horizontal rod (28), the spring (40) being adapted to urge continuously, via the vertical rod (21), the end (33) of the horizontal rod (28) toward the through holes (34).
- The safety device of the above claims, characterized in that the vertical rod (21) is provided with a first, a second and a third nut (36, 37, 38) disposed close together along the rod, the first nut (36) being applied on the upper part of the rod (21) and resting on the plane upper surface (39) of the bracket (22) so as to support the vertical rod (21) in oscillating fashion, and the second and third nuts (37, 38) being applied on each side of the hook (32) of the horizontal rod (28) to limit any lateral excursions thereof relative to the horizontal sliding plane thereof.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP19920112275 EP0578862B1 (en) | 1992-07-17 | 1992-07-17 | A safety device for a dishwasher for canteens |
ES92112275T ES2065733T3 (en) | 1992-07-17 | 1992-07-17 | A SAFETY DEVICE FOR A DISHWASHER MACHINE FOR BARS. |
DE1992601057 DE69201057T2 (en) | 1992-07-17 | 1992-07-17 | Safety device for a dishwasher for canteens. |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP19920112275 EP0578862B1 (en) | 1992-07-17 | 1992-07-17 | A safety device for a dishwasher for canteens |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0578862A1 true EP0578862A1 (en) | 1994-01-19 |
EP0578862B1 EP0578862B1 (en) | 1994-12-28 |
Family
ID=8209819
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19920112275 Expired - Lifetime EP0578862B1 (en) | 1992-07-17 | 1992-07-17 | A safety device for a dishwasher for canteens |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0578862B1 (en) |
DE (1) | DE69201057T2 (en) |
ES (1) | ES2065733T3 (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10054392A1 (en) * | 2000-11-02 | 2002-05-08 | Winterhalter Gastronom Gmbh | driving device |
US7568487B2 (en) | 2006-04-20 | 2009-08-04 | Maytag Corporation | Lid mechanism for a drawer-type dishwasher |
US7607444B2 (en) | 2005-11-29 | 2009-10-27 | Maytag Corporation | Latching and sealing mechanism for a drawer-type dishwasher |
US7731804B2 (en) | 2006-08-09 | 2010-06-08 | Maytag Corporation | Lid operating mechanism for a drawer-type dishwasher |
ITTO20120044A1 (en) * | 2012-01-20 | 2013-07-21 | Premark Feg Llc | TYPE DISHWASHER MACHINE WITH MOBILE HOOD, EQUIPPED WITH A PERFECTED SLIDING SYSTEM AND HOOD GUIDE |
CN106361232A (en) * | 2015-07-23 | 2017-02-01 | 朱玉根 | Mop |
CN108392141A (en) * | 2018-01-31 | 2018-08-14 | 杨秋霞 | A kind of sanitary ware cleaning device |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2063746A (en) * | 1930-11-03 | 1936-12-08 | Hobart Mfg Co | Washing machine |
US3486782A (en) * | 1966-09-03 | 1969-12-30 | Zanussi A Spa Industrie | Hydraulically actuated,delayed-opening,door-locking mechanism preferably applicable to household dishwashing and clothes washing machines |
US3949772A (en) * | 1974-12-13 | 1976-04-13 | General Electric Company | Door type dishwasher |
FR2352527A1 (en) * | 1976-05-24 | 1977-12-23 | Thirode Roger | Manually operated elevator-lid for commercial dishwasher - slides in subframe grooves and is counterbalanced by sprung levers |
US4088145A (en) * | 1976-10-18 | 1978-05-09 | Noren Tore H | Tandem rack dishwashing machine |
-
1992
- 1992-07-17 ES ES92112275T patent/ES2065733T3/en not_active Expired - Lifetime
- 1992-07-17 DE DE1992601057 patent/DE69201057T2/en not_active Expired - Lifetime
- 1992-07-17 EP EP19920112275 patent/EP0578862B1/en not_active Expired - Lifetime
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2063746A (en) * | 1930-11-03 | 1936-12-08 | Hobart Mfg Co | Washing machine |
US3486782A (en) * | 1966-09-03 | 1969-12-30 | Zanussi A Spa Industrie | Hydraulically actuated,delayed-opening,door-locking mechanism preferably applicable to household dishwashing and clothes washing machines |
US3949772A (en) * | 1974-12-13 | 1976-04-13 | General Electric Company | Door type dishwasher |
FR2352527A1 (en) * | 1976-05-24 | 1977-12-23 | Thirode Roger | Manually operated elevator-lid for commercial dishwasher - slides in subframe grooves and is counterbalanced by sprung levers |
US4088145A (en) * | 1976-10-18 | 1978-05-09 | Noren Tore H | Tandem rack dishwashing machine |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10054392A1 (en) * | 2000-11-02 | 2002-05-08 | Winterhalter Gastronom Gmbh | driving device |
US7607444B2 (en) | 2005-11-29 | 2009-10-27 | Maytag Corporation | Latching and sealing mechanism for a drawer-type dishwasher |
US7568487B2 (en) | 2006-04-20 | 2009-08-04 | Maytag Corporation | Lid mechanism for a drawer-type dishwasher |
US7731804B2 (en) | 2006-08-09 | 2010-06-08 | Maytag Corporation | Lid operating mechanism for a drawer-type dishwasher |
ITTO20120044A1 (en) * | 2012-01-20 | 2013-07-21 | Premark Feg Llc | TYPE DISHWASHER MACHINE WITH MOBILE HOOD, EQUIPPED WITH A PERFECTED SLIDING SYSTEM AND HOOD GUIDE |
WO2013109845A1 (en) * | 2012-01-20 | 2013-07-25 | Premark Feg L.L.C. | Dishwashing machine of the movable hood type, provided with an improved sliding and guiding system for the hood |
CN106361232A (en) * | 2015-07-23 | 2017-02-01 | 朱玉根 | Mop |
CN108392141A (en) * | 2018-01-31 | 2018-08-14 | 杨秋霞 | A kind of sanitary ware cleaning device |
CN108392141B (en) * | 2018-01-31 | 2020-11-17 | 嘉兴昱天工业设计有限公司 | Sanitary ware cleaning device |
Also Published As
Publication number | Publication date |
---|---|
EP0578862B1 (en) | 1994-12-28 |
DE69201057T2 (en) | 1995-05-11 |
DE69201057D1 (en) | 1995-02-09 |
ES2065733T3 (en) | 1995-02-16 |
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