EP3075934A1 - Sliding door drive device - Google Patents
Sliding door drive device Download PDFInfo
- Publication number
- EP3075934A1 EP3075934A1 EP15425028.6A EP15425028A EP3075934A1 EP 3075934 A1 EP3075934 A1 EP 3075934A1 EP 15425028 A EP15425028 A EP 15425028A EP 3075934 A1 EP3075934 A1 EP 3075934A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- door
- trolley
- sliding
- orthogonal
- vertex
- 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
Links
- 238000007789 sealing Methods 0.000 claims description 6
- 238000004659 sterilization and disinfection Methods 0.000 claims description 3
- 238000005406 washing Methods 0.000 claims description 3
- 230000003213 activating effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 230000004913 activation Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05D—HINGES OR SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS
- E05D15/00—Suspension arrangements for wings
- E05D15/16—Suspension arrangements for wings for wings sliding vertically more or less in their own plane
- E05D15/20—Suspension arrangements for wings for wings sliding vertically more or less in their own plane movable out of one plane into a second parallel plane
-
- 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
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
- E05F15/00—Power-operated mechanisms for wings
- E05F15/60—Power-operated mechanisms for wings using electrical actuators
- E05F15/603—Power-operated mechanisms for wings using electrical actuators using rotary electromotors
- E05F15/665—Power-operated mechanisms for wings using electrical actuators using rotary electromotors for vertically-sliding wings
-
- 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
- A47L15/42—Details
- A47L15/4251—Details of the casing
- A47L15/4257—Details of the loading door
- A47L15/4261—Connections of the door to the casing, e.g. door hinges
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05D—HINGES OR SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS
- E05D13/00—Accessories for sliding or lifting wings, e.g. pulleys, safety catches
- E05D13/10—Counterbalance devices
- E05D13/12—Counterbalance devices with springs
- E05D13/1207—Counterbalance devices with springs with tension springs
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05D—HINGES OR SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS
- E05D15/00—Suspension arrangements for wings
- E05D15/40—Suspension arrangements for wings supported on arms movable in vertical planes
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
- E05F15/00—Power-operated mechanisms for wings
- E05F15/40—Safety devices, e.g. detection of obstructions or end positions
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
- E05F15/00—Power-operated mechanisms for wings
- E05F15/60—Power-operated mechanisms for wings using electrical actuators
- E05F15/603—Power-operated mechanisms for wings using electrical actuators using rotary electromotors
- E05F15/665—Power-operated mechanisms for wings using electrical actuators using rotary electromotors for vertically-sliding wings
- E05F15/668—Power-operated mechanisms for wings using electrical actuators using rotary electromotors for vertically-sliding wings for overhead wings
- E05F15/681—Power-operated mechanisms for wings using electrical actuators using rotary electromotors for vertically-sliding wings for overhead wings operated by flexible elongated pulling elements, e.g. belts
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05Y—INDEXING SCHEME RELATING TO HINGES OR OTHER SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS AND DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION, CHECKS FOR WINGS AND WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
- E05Y2201/00—Constructional elements; Accessories therefore
- E05Y2201/40—Motors; Magnets; Springs; Weights; Accessories therefore
- E05Y2201/47—Springs; Spring tensioners
- E05Y2201/488—Traction springs
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05Y—INDEXING SCHEME RELATING TO HINGES OR OTHER SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS AND DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION, CHECKS FOR WINGS AND WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
- E05Y2400/00—Electronic control; Power supply; Power or signal transmission; User interfaces
- E05Y2400/10—Electronic control
- E05Y2400/52—Safety arrangements
- E05Y2400/53—Wing impact prevention or reduction
- E05Y2400/54—Obstruction or resistance detection
- E05Y2400/55—Obstruction or resistance detection by using load sensors
- E05Y2400/552—Switches
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05Y—INDEXING SCHEME RELATING TO HINGES OR OTHER SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS AND DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION, CHECKS FOR WINGS AND WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
- E05Y2900/00—Application of doors, windows, wings or fittings thereof
- E05Y2900/30—Application of doors, windows, wings or fittings thereof for domestic appliances
- E05Y2900/304—Application of doors, windows, wings or fittings thereof for domestic appliances for dishwashers
Definitions
- the present invention relates to a device for the movement of a sliding door, comprising a safety control and a shift in a direction orthogonal to the sliding plane.
- a device for the movement of a sliding door comprising a safety control and a shift in a direction orthogonal to the sliding plane.
- Specific reference will be made in the following to such a device applied to a machine for washing and disinfection, typically of articles used in the medical field, but it is clear that the device can be applied to other types of machines comprising the same type of door (e.g. dishwashers, sterilizers, refrigerators, ovens, etc.).
- a machine for washing and disinfection usually includes a wash tank provided with a front opening surrounded by a sealing gasket and closed by a door sliding vertically upwards to give access to the tank, this sliding movement being conferred to the door by a drive device.
- a drive device generally consists of two belt drives, one on each side of the door, each drive comprising a belt mounted on a pair of pulleys one of which is driven by a motor (which can also be only one for both drives).
- the device also comprises a safety system that in the phase of descent of the door controls the stopping or the reversal of the rotation of the motor(s), and thus the reopening of the door, if it detects an obstacle on the closure path.
- This safety system is required to prevent the door, in combination with the lower edge of the opening of the wash tank, from having a "scissor effect" on an object or an operator should it/him be found on its path.
- the presence of the obstacle can be detected from the increase in the drive torque required to move the door or, more preferably, by a micro-switch that is activated by the door itself that moves towards the tank in a direction orthogonal to the sliding plane as a consequence of the contact with the obstacle.
- EP 1949843 describes a device of this type in which the belt drive is not connected to the door directly but through a mechanical contrivance that comprises a trolley on which the door is mounted so as to be able to make said orthogonal shift. More specifically, the door is carried by the trolley through horizontal pins that engage substantially vertical eyelets the upper end of which is closer to the tank with respect to the lower end. In this way, in the normal downward movement the door pins rest on the lower ends of the eyelets, but when the door encounters an obstacle (which can also be the end-of-travel stop) the pins rise along the eyelets due to the relative movement of the trolley which continues to descend and the door shifts perpendicularly towards the tank activating the switch. Note that in the case in which the shift is caused by the end-of-travel stop this must also include a second switch that turns off the first switch, otherwise the motor would stop or reverse the movement of the door that could not close the tank by going to press the sealing gasket.
- the device described in EP 1949843 further comprises a spring arranged between the trolley and the door in a substantially vertical position, so as to exert a force in the direction opposite to the gravity force exerted on the door.
- This spring serves to reduce the impact of the door on the obstacle prior to the intervention of the safety system, since a part of the weight of the door is compensated by the spring force.
- the object of the present invention is therefore to provide a sliding door drive device that is free from said drawbacks.
- This object is achieved by means of a device of the type described above in which the door is mounted on each trolley through at least one articulated parallelogram whose outermost vertex is rotatably fixed on the trolley and whose innermost vertex is rotatably fixed on the door and engages a V-shaped profile formed on the trolley with a symmetrical arrangement with respect to the direction orthogonal to the sliding plane, the device further comprising elastic means that pull outwards said innermost vertex (note that outermost/innermost is defined with respect to the wash tank).
- a first important advantage of the present device is to provide the safety control and the orthogonal shift of the door with a smoother movement, which guarantees a lower wear of the components and a higher speed of operation of the safety system.
- a second significant advantage of this device is that it can be applied on a machine which provides for the closure of the door in any direction and not only downwards, even if the sliding plane is inclined with respect to the vertical.
- Still another advantage of the subject device in its preferred embodiment, is to do without the second switch since the safety switch which controls the stopping/reversal of the motor is not affected by the orthogonal shift of the door when the latter reaches the end-of-travel stop.
- a drive device can be applied both on a machine which provides for the opening of door 1 downwards ( Fig.1 ) and on a machine with the conventional opening of door 1 upwards ( Fig.2 ), as indicated by the representation in broken lines of the door in the open position.
- the vertical dimension of the machine is reduced since door 1 does not protrude upwards in the open position, so that the machine can also be placed in a more limited space.
- the device comprises two belt drives with the relative mounting contrivances of the door, one on each side of the door, but for the sake of simplicity figures 3a to 7 show only the unit on the left side of the machine, the unit on the right side being equal and symmetrical to it.
- Each unit conventionally includes a trolley 2, on which door 1 is mounted, attached to a belt 3 which extends between a drive pulley 4 and a return pulley 5.
- the size and layout of door 1 and belt 3 are such that in the open position of Fig.3a the front opening of tank W, surrounded by a sealing gasket G, is freely accessible.
- the device also comprises at least one micro-switch 7 operatively connected to a control unit (not shown) for controlling the stopping/rotation reversal of motor 8 which drives the drive pulley 4, as better explained in the following.
- each trolley 2 which in the first embodiment illustrated in figures 3a-3c includes a pair of articulated parallelograms 9, one near the top and one near the base of trolley 2, whose outermost vertex 9a is rotatably fixed on trolley 2 and whose innermost vertex 9b is rotatably fixed on door 1.
- Each innermost vertex 9b engages a V-shaped profile 10 which is formed on trolley 2 with a symmetrical arrangement with respect to the X direction orthogonal to the sliding plane.
- the force of spring 11 is sufficient to overcome the gravity force exerted on door 1 which tends to drag vertices 9b towards the lower ends of profiles 10, so that door 1 remains spaced from switch 7 and the sealing gasket G.
- the closing movement of door 1 is started by activating motor 8 which rotates the drive pulley 4 (in the counter-clockwise direction in the illustrated example) which drives belt 3 that lifts trolley 2 integral therewith which drags door 1 upwards through parallelograms 9. Thanks to the force of spring 11 that keeps the innermost vertices 9b engaged in the tip of the V shape of profiles 10, door 1 does not make contact during the ascent movement with gasket G nor with the safety switch 7.
- door 1 stops when an internal bracket 12 integral therewith abuts against an end-of-travel stop 13 secured to the frame of the machine, while the trolley 2 continues to rise until the innermost vertices 9b arrive into abutment with the lower end of profiles 10 ( Fig.3c ). Since the ascent of door 1 is blocked by stop 13, in this final portion of the closing travel the V-shaped profiles 10 push the innermost vertices 9b of parallelograms 9 towards tank W, overcoming the resistance of spring 11 and rotating parallelograms 9 counter-clockwise around the outermost vertices 9a. As a consequence, door 1 shifts in the X direction orthogonally to the sliding plane so as to press the sealing gasket G and to achieve the hermetic closure of tank W.
- FIGS. 4a and 4b respectively show the cases of contact with an obstacle B during the ascent and the descent of door 1, in the first case the operation of the device being entirely similar to that described above for the normal closing movement of door 1, only that it is obstacle B that blocks the ascent of door 1 instead of the end-of-travel stop 13.
- the operation is completely symmetrical to that described above, i.e. the innermost vertices 9b arrive at the upper end of profiles 10 and parallelograms 9 rotate clockwise, but in both cases the orthogonal shift of door 1 towards tank W causes the activation of the safety switch 7 that stops or reverses the rotation of motor 8.
- micro-switch 7 and the end-of-travel elements 12, 13 above tank W it is sufficient to move micro-switch 7 and the end-of-travel elements 12, 13 above tank W to apply a device similar to that described above to the machine of Fig.2 in which the closing movement takes place downwards.
- the device operates in the same way both with the closing movement upwards and downwards and in both cases it provides a safety control during both the opening and closing of door 1.
- Figures 5 to 7 similar to Fig.3b , show three other embodiments which differ from the first embodiment in terms of number and/or arrangement of the connection parallelograms 9 and/or of the elastic means which tend to compress them horizontally. More specifically, in the second embodiment of Fig.5 the single horizontal spring 11 arranged centrally between door 1 and trolley 2 is replaced by two horizontal springs 11 arranged directly between vertices 9a and 9b of the upper and lower parallelogram 9 respectively, while in the third embodiment of Fig.6 it is replaced by a vertical spring 11' arranged between the adjacent free vertices 9c, 9d of the two parallelograms 9 (i.e. the upper vertex 9c of the lower parallelogram 9 and the lower vertex 9d of the upper parallelogram 9) .
- the mounting of door 1 on trolley 2 provides a single parallelogram 9 and a single profile 10 arranged in a central position, with a pair of vertical springs 11", respectively arranged between trolley 2 and the free vertices 9c, 9d (which are free in that they are not bound to door 1 or trolley 2 as the other two vertices 9a, 9b).
- first and second embodiments may be combined by arranging horizontal springs 11 both between door 1 and trolley 2 and between vertices 9a and 9b, so as to obtain the force required for supporting door 1 through a greater number of smaller springs that offer greater reliability.
- the front view of Figure 8 shows how in the third embodiment the mounting contrivance on each side of door 1 comprises a vertical spring 11' arranged outside of parallelograms 9, but this spring may also be arranged inside of parallelograms 9 (or between these and trolley 2) or the contrivance could include two springs 11' respectively arranged inside and outside of parallelograms 9.
- parallelograms 9 inside of trolley 2, i.e. between the latter and door 1, provided that the pins that constitute vertices 9b extend outwards up to engagement with profiles 10 formed in trolley 2.
- the belt drive may be replaced by another type of transmission (e.g. rack) and springs 11, 11', 11" may be replaced by other equivalent elastic means.
- springs 11, 11', 11" may be replaced by other equivalent elastic means.
- the illustrated device provides a vertical up/down movement it could be used for a horizontal left/right movement through a simple rotation of 90° in the vertical plane, whereby any reference to the vertical arrangement of the above-described elements can be understood as horizontal in the case of horizontal movement and vice versa (therefore also the definitions upper/lower or top/bottom can be understood as right/left).
Abstract
Description
- The present invention relates to a device for the movement of a sliding door, comprising a safety control and a shift in a direction orthogonal to the sliding plane. Specific reference will be made in the following to such a device applied to a machine for washing and disinfection, typically of articles used in the medical field, but it is clear that the device can be applied to other types of machines comprising the same type of door (e.g. dishwashers, sterilizers, refrigerators, ovens, etc.).
- It is known that a machine for washing and disinfection usually includes a wash tank provided with a front opening surrounded by a sealing gasket and closed by a door sliding vertically upwards to give access to the tank, this sliding movement being conferred to the door by a drive device. Such a device generally consists of two belt drives, one on each side of the door, each drive comprising a belt mounted on a pair of pulleys one of which is driven by a motor (which can also be only one for both drives). The device also comprises a safety system that in the phase of descent of the door controls the stopping or the reversal of the rotation of the motor(s), and thus the reopening of the door, if it detects an obstacle on the closure path.
- This safety system is required to prevent the door, in combination with the lower edge of the opening of the wash tank, from having a "scissor effect" on an object or an operator should it/him be found on its path. To this purpose, the presence of the obstacle can be detected from the increase in the drive torque required to move the door or, more preferably, by a micro-switch that is activated by the door itself that moves towards the tank in a direction orthogonal to the sliding plane as a consequence of the contact with the obstacle.
-
EP 1949843 describes a device of this type in which the belt drive is not connected to the door directly but through a mechanical contrivance that comprises a trolley on which the door is mounted so as to be able to make said orthogonal shift. More specifically, the door is carried by the trolley through horizontal pins that engage substantially vertical eyelets the upper end of which is closer to the tank with respect to the lower end. In this way, in the normal downward movement the door pins rest on the lower ends of the eyelets, but when the door encounters an obstacle (which can also be the end-of-travel stop) the pins rise along the eyelets due to the relative movement of the trolley which continues to descend and the door shifts perpendicularly towards the tank activating the switch. Note that in the case in which the shift is caused by the end-of-travel stop this must also include a second switch that turns off the first switch, otherwise the motor would stop or reverse the movement of the door that could not close the tank by going to press the sealing gasket. - The device described in
EP 1949843 further comprises a spring arranged between the trolley and the door in a substantially vertical position, so as to exert a force in the direction opposite to the gravity force exerted on the door. This spring serves to reduce the impact of the door on the obstacle prior to the intervention of the safety system, since a part of the weight of the door is compensated by the spring force. - This known solution, although quite effective, still has some drawbacks the first of which is the ability to operate only with a downward closing movement but not in the case of closure upwards or sidewards (left or right). Furthermore, since the weight of the door is concentrated on the pins that slide in the eyelets the movement is not quite smooth and the eyelets have wear problems, in fact the document itself states that the eyelets are preferably made of a material with high wear resistance.
- The object of the present invention is therefore to provide a sliding door drive device that is free from said drawbacks. This object is achieved by means of a device of the type described above in which the door is mounted on each trolley through at least one articulated parallelogram whose outermost vertex is rotatably fixed on the trolley and whose innermost vertex is rotatably fixed on the door and engages a V-shaped profile formed on the trolley with a symmetrical arrangement with respect to the direction orthogonal to the sliding plane, the device further comprising elastic means that pull outwards said innermost vertex (note that outermost/innermost is defined with respect to the wash tank).
- A first important advantage of the present device is to provide the safety control and the orthogonal shift of the door with a smoother movement, which guarantees a lower wear of the components and a higher speed of operation of the safety system.
- A second significant advantage of this device is that it can be applied on a machine which provides for the closure of the door in any direction and not only downwards, even if the sliding plane is inclined with respect to the vertical.
- Still another advantage of the subject device, in its preferred embodiment, is to do without the second switch since the safety switch which controls the stopping/reversal of the motor is not affected by the orthogonal shift of the door when the latter reaches the end-of-travel stop.
- Further advantages and characteristics of the device according to the present invention will become apparent to those skilled in the art from the following detailed description of some embodiments thereof with reference to the accompanying drawings, in which:
-
Figs.1 and 2 are schematic front views of two machines to which the present device can be applied; - Fisg.3a-3c are schematic side views showing the closing movement of a first embodiment of the device applied to the machine of
Fig.1 ; -
Figs.4a-4b are schematic side views showing the operation of the first embodiment of the device in case of encounter with an obstacle during the ascent or descent of the door, respectively; -
Figs.5-7 are schematic side views showing three other embodiments of the device; and -
Fig.8 is a schematic front view of the embodiment ofFig.6 . - Referring to
figures 1 and 2 , there is seen that a drive device according to the invention can be applied both on a machine which provides for the opening ofdoor 1 downwards (Fig.1 ) and on a machine with the conventional opening ofdoor 1 upwards (Fig.2 ), as indicated by the representation in broken lines of the door in the open position. In the first case the vertical dimension of the machine is reduced sincedoor 1 does not protrude upwards in the open position, so that the machine can also be placed in a more limited space. - As previously mentioned, the device comprises two belt drives with the relative mounting contrivances of the door, one on each side of the door, but for the sake of simplicity
figures 3a to 7 show only the unit on the left side of the machine, the unit on the right side being equal and symmetrical to it. Each unit conventionally includes atrolley 2, on whichdoor 1 is mounted, attached to abelt 3 which extends between adrive pulley 4 and areturn pulley 5. The size and layout ofdoor 1 andbelt 3 are such that in the open position ofFig.3a the front opening of tank W, surrounded by a sealing gasket G, is freely accessible. The device also comprises at least one micro-switch 7 operatively connected to a control unit (not shown) for controlling the stopping/rotation reversal ofmotor 8 which drives thedrive pulley 4, as better explained in the following. - The novel aspect of this device, as mentioned above, resides in the mode of mounting
door 1 on eachtrolley 2, which in the first embodiment illustrated infigures 3a-3c includes a pair of articulatedparallelograms 9, one near the top and one near the base oftrolley 2, whoseoutermost vertex 9a is rotatably fixed ontrolley 2 and whoseinnermost vertex 9b is rotatably fixed ondoor 1. Eachinnermost vertex 9b engages a V-shaped profile 10 which is formed ontrolley 2 with a symmetrical arrangement with respect to the X direction orthogonal to the sliding plane. - A
horizontal spring 11 arranged betweendoor 1 andtrolley 2, in a central position betweenprofiles 10, pulls outwards theinnermost vertex 9b of eachparallelogram 9 so that it engages the tip of the V shape of therespective profile 10. The force ofspring 11 is sufficient to overcome the gravity force exerted ondoor 1 which tends to dragvertices 9b towards the lower ends ofprofiles 10, so thatdoor 1 remains spaced fromswitch 7 and the sealing gasket G. - In the light of this description, the simple and effective operation of the device according to the present invention is readily understood with the aid of
figures 3b to 4b . - Starting from the open position of
Fig.3a , the closing movement ofdoor 1 is started by activatingmotor 8 which rotates the drive pulley 4 (in the counter-clockwise direction in the illustrated example) which drivesbelt 3 that liftstrolley 2 integral therewith which dragsdoor 1 upwards throughparallelograms 9. Thanks to the force ofspring 11 that keeps theinnermost vertices 9b engaged in the tip of the V shape ofprofiles 10,door 1 does not make contact during the ascent movement with gasket G nor with thesafety switch 7. - The upward movement of
door 1 stops when aninternal bracket 12 integral therewith abuts against an end-of-travel stop 13 secured to the frame of the machine, while thetrolley 2 continues to rise until theinnermost vertices 9b arrive into abutment with the lower end of profiles 10 (Fig.3c ). Since the ascent ofdoor 1 is blocked bystop 13, in this final portion of the closing travel the V-shaped profiles 10 push theinnermost vertices 9b ofparallelograms 9 towards tank W, overcoming the resistance ofspring 11 and rotatingparallelograms 9 counter-clockwise around theoutermost vertices 9a. As a consequence,door 1 shifts in the X direction orthogonally to the sliding plane so as to press the sealing gasket G and to achieve the hermetic closure of tank W. - Note that when the top of
door 1 comes flush with the upper edge of the front opening of tank W (Fig.3b ), i.e. when the risk of the "scissors effect" terminates, the bottom ofdoor 1 comes flush withswitch 7. In this way, whendoor 1 shifts orthogonally in the final portion of the closing travel it is no longer overlapped to switch 7 which therefore is not activated. Thus it is not necessary to provide a second switch on the end-of-travel stop 13 as in the above-described prior art device, since thesafety switch 7 is not activated in the normal closing movement ofdoor 1 in the end-of-travel position but only in case of contact with an actual obstacle. - This latter occurrence is illustrated in
figures 4a and 4b which respectively show the cases of contact with an obstacle B during the ascent and the descent ofdoor 1, in the first case the operation of the device being entirely similar to that described above for the normal closing movement ofdoor 1, only that it is obstacle B that blocks the ascent ofdoor 1 instead of the end-of-travel stop 13. In the second case the operation is completely symmetrical to that described above, i.e. theinnermost vertices 9b arrive at the upper end ofprofiles 10 andparallelograms 9 rotate clockwise, but in both cases the orthogonal shift ofdoor 1 towards tank W causes the activation of thesafety switch 7 that stops or reverses the rotation ofmotor 8. - Note that it is sufficient to move micro-switch 7 and the end-of-
travel elements Fig.2 in which the closing movement takes place downwards. In other words, the device operates in the same way both with the closing movement upwards and downwards and in both cases it provides a safety control during both the opening and closing ofdoor 1. -
Figures 5 to 7 , similar toFig.3b , show three other embodiments which differ from the first embodiment in terms of number and/or arrangement of theconnection parallelograms 9 and/or of the elastic means which tend to compress them horizontally. More specifically, in the second embodiment ofFig.5 the singlehorizontal spring 11 arranged centrally betweendoor 1 andtrolley 2 is replaced by twohorizontal springs 11 arranged directly betweenvertices lower parallelogram 9 respectively, while in the third embodiment ofFig.6 it is replaced by a vertical spring 11' arranged between the adjacentfree vertices upper vertex 9c of thelower parallelogram 9 and thelower vertex 9d of the upper parallelogram 9) . - Finally, in the fourth embodiment of
Fig.7 the mounting ofdoor 1 ontrolley 2 provides asingle parallelogram 9 and asingle profile 10 arranged in a central position, with a pair ofvertical springs 11", respectively arranged betweentrolley 2 and thefree vertices door 1 ortrolley 2 as the other twovertices - Note that further embodiments not illustrated in the figures may be easily obtained by combining the above-described embodiments in case of specific constructional requirements such as cost, size, strength, redundancy, etc. For example, the first and second embodiments may be combined by arranging
horizontal springs 11 both betweendoor 1 andtrolley 2 and betweenvertices door 1 through a greater number of smaller springs that offer greater reliability. - The same applies to the possible doubling and/or different positioning of the springs or other components illustrated in the figures where this is possible and desirable. For example, the front view of
Figure 8 shows how in the third embodiment the mounting contrivance on each side ofdoor 1 comprises a vertical spring 11' arranged outside ofparallelograms 9, but this spring may also be arranged inside of parallelograms 9 (or between these and trolley 2) or the contrivance could include two springs 11' respectively arranged inside and outside ofparallelograms 9. Furthermore, it would also be possible to arrangeparallelograms 9 inside oftrolley 2, i.e. between the latter anddoor 1, provided that the pins that constitutevertices 9b extend outwards up to engagement withprofiles 10 formed introlley 2. - It is therefore clear that the above-described and illustrated embodiments of the device according to the invention are just examples susceptible of various modifications in addition to those already mentioned above. In particular, the belt drive may be replaced by another type of transmission (e.g. rack) and
springs parallelogram 9 all sides have the same length and thatvertices door 1 is open, although preferable, is not strictly necessary. - Moreover, as mentioned earlier, although the illustrated device provides a vertical up/down movement it could be used for a horizontal left/right movement through a simple rotation of 90° in the vertical plane, whereby any reference to the vertical arrangement of the above-described elements can be understood as horizontal in the case of horizontal movement and vice versa (therefore also the definitions upper/lower or top/bottom can be understood as right/left).
Claims (10)
- Drive device for a door (1) sliding on a machine frame between an open position and a closed position in which it seals an opening of a compartment (W) of said machine, the sliding movement of said door (1) being provided by a pair of drives arranged on opposite sides of the door (1) parallel to the sliding direction, the door (1) being connected to said drives via a pair of respective mounting contrivances which allow it also a shift in the direction (X) orthogonal to its sliding plane between an outer position normally maintained during its sliding movement between said open and closed positions and an inner position in which the door (1) presses on a sealing gasket (G) arranged around the opening of said compartment (W), each mounting contrivance comprising a trolley (2) integral with a mobile drive element of the respective drive, characterized in that the door (1) is mounted on each trolley (2) through at least one articulated parallelogram (9) whose outermost vertex (9a) is rotatably fixed on the trolley (2) and whose innermost vertex (9b) is rotatably fixed on the door (1) and engages a V-shaped profile (10) formed on the trolley (2) with a symmetrical arrangement with respect to said direction (X) orthogonal to the sliding plane, the device further comprising elastic means which pull outwards said innermost vertex (9b).
- Device according to claim 1, characterized in that the elastic means comprise one or more horizontal springs (11) arranged between the door (1) and the trolley (2).
- Device according to claim 1 or 2, characterized in that the door (1) is mounted on each trolley (2) through two articulated parallelograms (9) arranged respectively near the ends of the trolley (2).
- Device according to claim 3, characterized in that the elastic means comprise one or more vertical springs (11') arranged between the adjacent free vertices (9c, 9d) of the two articulated parallelograms (9).
- Device according to any of the preceding claims, characterized in that the elastic means comprise two or more vertical springs (11") arranged respectively between the free vertices (9c, 9d) of an articulated parallelogram (9) and the trolley (2).
- Device according to any of claims 2 to 5, characterized in that the springs (11; 11'; 11") are arranged outside of the articulated parallelograms (9).
- Device according to any of the preceding claims, characterized in that the articulated parallelograms (9) are arranged outside of the trolleys (2).
- Device according to any of the preceding claims, characterized in that each articulated parallelogram (9) has equal sides and the outermost (9a) and innermost (9b) vertices which are aligned in the direction (X) orthogonal to the sliding plane when the door(1) is open.
- Device according to any of the preceding claims, characterized in that it further comprises at least one micro-switch (7) operatively connected to a control unit to control the stopping/reversal of the sliding movement of the door (1), said at least one micro-switch (7) being positioned so as to be activated by the door (1) only when the latter shifts towards the compartment (W) in the direction (X) orthogonal to its sliding plane without being in its end-of-travel closing position.
- A machine for washing and disinfection, characterized by comprising a drive device for a sliding door (1) according to any of the preceding claims.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP15425028.6A EP3075934B1 (en) | 2015-03-31 | 2015-03-31 | Sliding door drive device |
PL15425028T PL3075934T3 (en) | 2015-03-31 | 2015-03-31 | Sliding door drive device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP15425028.6A EP3075934B1 (en) | 2015-03-31 | 2015-03-31 | Sliding door drive device |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3075934A1 true EP3075934A1 (en) | 2016-10-05 |
EP3075934B1 EP3075934B1 (en) | 2017-05-10 |
Family
ID=53189766
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP15425028.6A Active EP3075934B1 (en) | 2015-03-31 | 2015-03-31 | Sliding door drive device |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP3075934B1 (en) |
PL (1) | PL3075934T3 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108784584A (en) * | 2018-05-23 | 2018-11-13 | 佛山市顺德区美的洗涤电器制造有限公司 | Gate control method, device and the computer readable storage medium of dish-washing machine |
EP3409824A1 (en) | 2017-05-30 | 2018-12-05 | Bonferraro S.p.A. | Washing apparatus with sliding door provided with a device for collecting and draining water dripping from the door |
CN109186169A (en) * | 2018-08-29 | 2019-01-11 | 南京创维家用电器有限公司 | A kind of anti-cold draining sealing structure of refrigerator hermatic door |
CN112302467A (en) * | 2019-08-01 | 2021-02-02 | 天津物网科技有限公司 | Opening and closing door of goods storage cabinet of vending machine |
EP4193900A1 (en) * | 2021-12-07 | 2023-06-14 | Getinge Disinfection AB | A medical washer/disinfector |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19514303A1 (en) * | 1995-04-25 | 1996-10-31 | Miele & Cie | Washing machine for laboratory or hospital use |
EP1949843A1 (en) | 2007-01-29 | 2008-07-30 | International Steel Co. SpA | Safety device for a closing element of a washing, thermal-disinfection, sterilization, preservation, refrigeration, heating machine, or suchlike |
-
2015
- 2015-03-31 EP EP15425028.6A patent/EP3075934B1/en active Active
- 2015-03-31 PL PL15425028T patent/PL3075934T3/en unknown
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19514303A1 (en) * | 1995-04-25 | 1996-10-31 | Miele & Cie | Washing machine for laboratory or hospital use |
EP1949843A1 (en) | 2007-01-29 | 2008-07-30 | International Steel Co. SpA | Safety device for a closing element of a washing, thermal-disinfection, sterilization, preservation, refrigeration, heating machine, or suchlike |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3409824A1 (en) | 2017-05-30 | 2018-12-05 | Bonferraro S.p.A. | Washing apparatus with sliding door provided with a device for collecting and draining water dripping from the door |
CN108784584A (en) * | 2018-05-23 | 2018-11-13 | 佛山市顺德区美的洗涤电器制造有限公司 | Gate control method, device and the computer readable storage medium of dish-washing machine |
CN109186169A (en) * | 2018-08-29 | 2019-01-11 | 南京创维家用电器有限公司 | A kind of anti-cold draining sealing structure of refrigerator hermatic door |
CN109186169B (en) * | 2018-08-29 | 2021-03-02 | 南京创维家用电器有限公司 | Cold seal structure of leak protection of refrigerator sealing door |
CN112302467A (en) * | 2019-08-01 | 2021-02-02 | 天津物网科技有限公司 | Opening and closing door of goods storage cabinet of vending machine |
EP4193900A1 (en) * | 2021-12-07 | 2023-06-14 | Getinge Disinfection AB | A medical washer/disinfector |
WO2023104427A1 (en) * | 2021-12-07 | 2023-06-15 | Getinge Disinfection Ab | A medical washer/disinfector |
Also Published As
Publication number | Publication date |
---|---|
EP3075934B1 (en) | 2017-05-10 |
PL3075934T3 (en) | 2017-10-31 |
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