EP2578134B1 - Door lock, in particular for commercial cleaning and disinfection machines - Google Patents

Description

The invention relates to a door lock for particular commercial cleaning and / or disinfection machines, arranged with a pivotably designed on a car door block and a cooperating with the block Klobenfalle, the Klobenfalle einendseitig a rack is arranged, and with a motor, by means of which the rack is movable by motor, wherein between the motor and the rack, a slip clutch is arranged.

The invention further relates to a cleaning and / or disinfecting machine equipped with such a door lock with a washing container, the Spülbehälteröffnung is closed by means of a pivotable trained automatic door.

Cleaning and / or disinfection machines of the type mentioned are well known as well as door locks of the type mentioned in the prior art, which is why it does not require a separate documentary evidence at this point. It is therefore only exemplary on the DE 10 2005 028 448 B4 referenced, which discloses a generic door lock and a generic machine.

Cleaning and / or disinfection machines of the type mentioned above have a washing container. This washing container serves to receive items to be cleaned and / or to be disinfected. About a Spülbehälteröffnung the washing is accessible. In the case of cleaning and / or disinfecting, the rinsing container opening is closed in a fluid-tight manner by means of an automatic door. The automatic door is designed to be pivotable and can be pivoted on the user side from an open position into a closed position and vice versa.

For the purpose of closing the automatic door is a door lock. This one on the one hand and a Klobenfalle on the other hand ready. The block is arranged on the automatic door, and the cooperating Klobenfalle is located on the washing container. In domestic dishwashers, it is known that the door lock is designed to be motor-actuated, for which purpose an electric motor is provided.

This cooperates with a rack, which is designed to be movable by means of the motor. With her the automatic door facing end of the rack carries the Klobenfalle.

To protect against overloading a slip clutch is arranged between the engine and the rack, which can slip in the case of abusive forces in the closing direction.

An intended for domestic dishwasher door lock of the type described above essentially fulfills two main functions. On the one hand, it serves, after a user-side closing of the automatic door, to use it for the purpose of fluid-tight closing of the flushing chamber to the seal provided for this purpose. On the other hand, after a proper execution of a cleaning program, an automatic gap-type opening of the door is made possible, which supports a drying process connected downstream of the actual cleaning process. Steam swells still present in the flushing room can be released into the ambient air via the opening gap. After such a swath escape, an automatic return of the automatic door can then take place in their Veschlussposition.

Although the above-described door lock and a dishwasher equipped therewith have proven their worth in everyday use, there is a need for improvement in particular for use in automatic cleaning and / or disinfecting machines. Thus, it has proven particularly disadvantageous that in case of failure of the engine, for example, in the de-energized case, a manual opening of the automatic door is not readily possible. It is therefore an object of the invention to further develop a door lock of the type mentioned in that a manual unlocking, that is opening the automatic door is possible even in the de-energized case.

To solve this problem, a door lock of the type mentioned is proposed with the invention, which is characterized by a cooperating with the slip clutch release mechanism, by means of which the slip clutch is manually transferred to a free-running position with the automatic door closed.

The door closure according to the invention has a release mechanism. This release mechanism allows emergency release even in de-energized and / or defective engine. This is even with a complete failure of the electromotive components of the door lock the same unlocking and thus allows the opening of the automatic door.

It is inventively provided that the release mechanism cooperates with the arranged between the engine and rack friction clutch. In the case of operation, the slip clutch is disconnected manually, so that a power decoupling of the engine on the one hand and rack on the other hand takes place. As a result of this power decoupling, the rack can be moved freely, which in turn allows the automatic door to be transferred from the closed position to an open position. In the open position, a free access to the one end of the rack worn Klobenfalle is possible, so that a manual decoupling of Kloben and Klobenfalle is possible, which allows a complete opening of the automatic door after successful decoupling.

By means of the release mechanism, the slip clutch can be transferred to a free-running position when the automatic door is closed, specifically by purely manual action. This can be accomplished even with the door closed and complete failure of all electromotive components of the door lock an opening of the door. In contrast to the prior art, an emergency unlocking of the automatic door is thus possible, so that the relevant standard in this respect DIN EN ISO 15883 is satisfied in an advantageous manner.

To solve the above object, the invention also proposes a cleaning and / or disinfecting machine with the features of claim 11. This embodiment effects the advantages already described above.

Advantageous embodiments of the invention are specified in the subclaims. In this case, in particular the embodiment of an advantage, according to which a load switch is provided, which serves the switching on and off of a circulation pump of the cleaning and / or disinfection machine.

So it may happen that despite a complete failure of the electromotive components of the door lock the cleaning and / or disinfection machine incidentally is still functional. It must therefore be ensured that in the case of a manual opening of the automatic door by means of the emergency release provided according to the invention, under some circumstances still hot rinsing liquor does not escape through an opening gap arising when the automatic door is opened. Adversely, it could otherwise come in the worst case burns to the user.

Therefore, a load switch is provided according to the invention. This load switch preferably cooperates with the rack, which has switching means for this purpose. In the case of a manual opening of the automatic door by means of the emergency release provided according to the invention, a method of the rack occurs in the already described manner. As a result, the switching means provided by the rack are brought into contact with the load switch, whereby an operation thereof takes place. The load switch is in turn coupled to the circulation pump of the cleaning and / or disinfection machine, so that takes place via an operation of the circuit breaker on or off the circulation pump. In the case of emergency unlocking takes place by means of the circuit breaker emergency shutdown of the circulation pump, so that in the washing compartment of the machine may still located rinsing water is not circulated, so that an accidental leakage of rinsing water is prevented from an opening in the event of opening gap. A risk to the user by uncontrolled leaking rinsing water is avoided.

Figur 1

in einer schematisch perspektivischen Ansicht einen Spülbehälter eines Reinigungs- und/oder Desinfektionsautomaten;

Figur 2

in einer schematischen Seitenansicht den erfindungsgemäßen Türverschluss;

Figur 3

in einer schematischen Draufsicht von oben den erfindungsgemäßen Türverschluss;

Figur 4

in einer schematischen Seitenansicht den erfindungsgemäßen Türverschluss bei einer spaltweise geöffneten Automatentür;

Figur 5

in einer schematischen Seitenansicht den erfindungsgemäßen Türverschluss bei verschlossener Automatentür;

Figur 6

in einer schematischen Vorderansicht den Türverschluss in einer Ausschnittsdarstellung;

Figur 7

in einer schematischen Seitenansicht den erfindungsgemäßen Türverschluss bei geschlossener Klobenfalle;

Figur 8

in einer schematischen Seitenansicht den erfindungsgemäßen Türverschluss bei geöffneter Klobenfalle;

Figur 9

in schematischer Draufsicht von oben den erfindungsgemäßen Türverschluss bei geschlossener Automatentür;

Figur 10

in schematischer Draufsicht von oben den erfindungsgemäßen Türverschluss bei geschlossener Automatentür und eingeführtem Auslöseelement zur Betätigung der Notentriegelung;

Figur 11

in schematischer Draufsicht von oben den erfindungsgemäßen Türverschluss bei geschlossener Automatentür und betätigter Notentriegelung;

Figur 12

in einer schematischen Schnittdarstellung die Antriebs- und Abtriebswelle des erfindungsgemäßen Türverschlusses in einer ersten Stellung;

Figur 13

in einer schematischen Schnittdarstellung die Antriebs- und Abtriebswelle des erfindungsgemäßen Türverschlusses in einer zweiten Stellung;

Figur 14

in einer schematischen Draufsicht von oben den erfindungsgemäßen Türverschluss gemäß einer zweiten Ausführungsform;

Figur 15

in einer schematischen Draufsicht von oben den Türverschluss nach Figur 14 bei betätigter Notentriegelung und

Figur 16

in einer schematisch perspektivischen Darstellung den Türverschluss nach Figur 15.

Further features and advantages of the invention will become apparent from the following description with reference to FIGS. Show

FIG. 1

in a schematic perspective view of a washing container of a cleaning and / or disinfecting machine;

FIG. 2

in a schematic side view of the door lock according to the invention;

FIG. 3

in a schematic plan view from above the door lock according to the invention;

FIG. 4

in a schematic side view of the door lock according to the invention in a slot-wise opened automatic door;

FIG. 5

in a schematic side view of the door lock according to the invention with a closed automatic door;

FIG. 6

in a schematic front view of the door lock in a sectional view;

FIG. 7

in a schematic side view of the door lock according to the invention in closed Klobenfalle;

FIG. 8

in a schematic side view of the door lock according to the invention with open Klobenfalle;

FIG. 9

in a schematic plan view from above the door lock according to the invention with the door closed;

FIG. 10

in a schematic plan view from above the door lock according to the invention with the door closed and inserted trigger element for actuating the emergency release;

FIG. 11

in a schematic plan view from above the door lock according to the invention with the door closed and operated emergency release;

FIG. 12

in a schematic sectional view of the drive and output shaft of the door lock according to the invention in a first position;

FIG. 13

in a schematic sectional view of the drive and output shaft of the door lock according to the invention in a second position;

FIG. 14

in a schematic plan view from above the door lock according to the invention according to a second embodiment;

FIG. 15

in a schematic plan view from above the door lock after FIG. 14 with emergency release and

FIG. 16

in a schematic perspective view of the door lock after FIG. 15 ,

FIG. 1 can be seen in a schematic perspective view of a washing 1 a better overview of otherwise not shown cleaning and / or disinfection machine. The rinsing container 1 provides a rinsing room which is accessible via a rinsing chamber opening which can be closed by means of an automatic door 2.

As the representation after FIG. 1 can be seen, the automatic door 2 is pivotally mounted on the washing 1. The automatic door 2 carries Spülflut side a clamp 3. This acts with a in FIG. 1 not shown in detail Klobenfalle 4 together, which is part of a door closure 9, which is arranged on the upper side of the washing compartment 1. Here, the door lock 9 between a in FIG. 1 not shown cover 22 and the washing container 1 mounted. This factual context arises in particular from the presentation below FIG. 2 ,

FIG. 2 lets the door latch 9 schematically recognize in a partially sectioned side view. As can be seen in particular from this illustration, the door lock 9 is arranged between the washing container 1 and a cover 22 arranged in the final mounted state on the washing container 1. In the closed state of the automatic door 2 arranged pivotably on the washing container 1, a gap 23 remains between the lid 22 and the automatic door 2. As will be described in more detail below, this gap 23 serves to introduce a tool 42, which is a manual emergency unlocking of the door closure 9 allowed with the door closed 2.

Like that Figures 2 and 3 can be seen, the door lock 9 has an electric motor 6 which drives a toothed rack 5 via a multi-stage gear 24, which is a multi-stage toothing 20 (comparative FIG. 5 ) is in engagement with an output shaft 11. The gear 24 is self-locking. By means of corresponding lateral clearances 31, signal switches 32 and a load switch 29 are actuated, the load switch 29 switching on or off a circulating pump, not further shown in the figures, of the automatic irrigator.

To the gear 24, a drive shaft 10 is flanged. This drive shaft 10 is connected to the output shaft 11 via a friction clutch 7 in the closing direction of the automatic door 2 frictionally or non-positively, so that the slip clutch 7 can slip in the case of abusive forces in the closing direction and protects the entire unit of the door lock 9 from damage. In the opening direction of the automatic door 2, the drive shaft 10, however, by means of the slip clutch 7 positively coupled to the output shaft 11.

The slip clutch 7 has two clutch discs 12 and 13, wherein the drive shaft 10 opens into the clutch disc 12 and the output shaft 11 in the clutch disc 13.

As can be seen in particular from the presentation FIG. 2 results, the output shaft 11 carries a pinion 21. This is engaged with the toothing 20 provided by the rack 20th

As a result of an actuation of the electric motor 6, there is a rotational movement of the output shaft 11, wherein the rotational movement via the gear 24, the drive shaft 10 and provided between the drive shaft 10 and output shaft 11 slipping clutch 7 is introduced into the output shaft 11. As a result of this twisting movement, there is a translational movement of the rack 5, in the transverse direction 28. This is because the driven by the output shaft 11 pinion 21 with respect to the drawing plane to FIG. 2 underside of the rack 5 formed teeth 20 is engaged. Depending on the direction of rotation of the electric motor 6, this takes place with reference to the plane of the drawing FIG. 2 either a method of the rack 5 to the right or to the left. During a movement of the rack 5 with respect to the plane of the drawing FIG. 2 to the right, it comes to a closing movement. A movement of the rack 5 in the other direction represents an opening movement.

For transmitting power to the drive shaft 10 may be provided between the gear 24 and the drive shaft 10, a gear assembly 25, as is the embodiment according to FIG. 3 shows.

The above-described structural components of the door closure 9 are preferably housed within a housing 40. This results in an advantageous manner in assembly or disassembly easy to handle unit. This unit can, as in particular the illustration after FIG. 1 can be seen, the top of the washing compartment 1 are mounted in a simple manner.

The operation of the door closure 9 results in particular from a synopsis of FIGS. 4 to 8 , which show the door latch 1 in each case partially in different positions.

The automatic door 2 carries the door lock side a clamp 3. About this block 3, the automatic door 2 can be tightened, opened and held. By means of a Hall sensor 35 (comparative) FIG. 5 ) can be sensed whether the block is taken from the scavenging container side carried Klobenfalle 4 or not.

In the normal operating state of the machine, the automatic door 2 in the locked state, that is without an operation of a corresponding control knob, the automatic door 2 is not open (cf. FIGS. 6 and 7 ). In this position, the door closure 9 is pulled over the Klobenfalle 4 a biased by a leaf spring 46 locking sleeve 26. A release of the block 3 by pivoting the wing 34 of the clove trap 4 is thus prevented.

The Klobenfalle 4 is connected via a rotary joint 36 with the rack 5 (cf. FIG. 5 ). When the automatic door 2 is closed, that is, when the automatic door is pivoted counter to the direction of the arrow 33 (cf. FIG. 4 ), the block 3 is first held frictionally by the Klobenfalle 4 and thus by the rack 5. The actual positive locking of the clamp 3 and thus the automatic door 2 is realized via two laterally located on the Klobenfalle 4 wings 34, which can auffedern after a defined travel from the locking sleeve 26 down freely (cf. FIG. 8 ), but after a retraction into the locking sleeve 26 are positively prevented from jumping on (cf. FIG. 7 ), whereby the block 3 is positively and non-positively held by the Klobenfalle 4.

To open the automatic door 2 during a wash program, that is, during a proper use of the machine, the user of the dishwasher has a control button to operate, resulting in a motorized movement of the rack 5, wherein the rack 5 as a result of this movement as far forward, that is in the direction of the automatic door 2 is moved until the Klobenfalle 4 is moved out of the locking sleeve 26, so that the wings 34 of the Klobenfalle 4 auffedern free again and can release the clamp 3. As soon as the Klobenfalle 4 is moved so far in the direction of the automatic door 2, that the wings 34 can auffedern to release the block 3 down, the door lock 9 is a so-called "zipper", that is, the machine door 2 can be opened on the user side. FIG. 8 makes the movement of the individual components of the door closure 9 with the arrows 37, 38 and 39 clearly visible.

An opening of the door closure 9 and thus the automatic door 2 requires the proper functioning of the electric motor 6. If this defect and / or the entire automatic machine is de-energized, opening the door closure 9 is not possible.

Therefore, according to the invention, the door lock 9 has an emergency release that can be operated from the outside when the automatic door 2 is closed.

The construction and operation of the emergency release according to the invention results in particular from the illustration according to the FIGS. 9 to 16 ,

The emergency release has a release mechanism 8. This release mechanism 8 cooperates with the slip clutch 7, which allows it to manually transfer the slip clutch 7 in a freewheeling position with the automatic door closed, that is, the drive train 5 driving the toothed rack by separating the two clutch plates 12th and 13 to interrupt. As a consequence, the rack 5 can be moved freely in the transverse direction 28, since the output shaft 11, which carries the pinion 21 meshing with the toothing 20 of the rack 5, can rotate freely when the slip clutch 7 is separate. As a consequence, the automatic door 2 can be transferred to an open position without the need for current supply to the electric motor 6.

As can be seen in particular from the Figures 12 and 13 results, the output shaft 11 is designed as a hollow shaft and provides a running in the longitudinal direction 19 guide channel 18 ready. The drive shaft 10 has output shaft side via a shaft 17 which is received in the final assembled state of the guide channel 18 of the output shaft 11. In this case, the shaft 17 exceeds the guide channel 18 in the longitudinal direction 19 and forms a protruding from the guide channel 18 extension 47.

This extension 47 carries a spring element 27 in the form of a compression spring, by means of which the drive shaft 10 is supported relative to the output shaft 11. As a consequence, in the normal position of drive shaft 10 and output shaft 11, the clutch discs 12 and 13 of the slip clutch 7 are engaged, as shown in FIG FIG. 12 is shown.

The intended for the purpose of emergency release release mechanism 8 has a pivoting element 14, which in the embodiment shown in the FIGS. 9 to 11 is designed as a lever. This lever is designed to pivot about the axis of rotation 15 and acts in Verschwenkungsfall on the drive shaft 10 a.

During a pivoting movement of the pivoting element 14, the drive shaft 10 is opposite to the force acting by the spring element 27 spring force 16 with respect to the plane of the drawing after the FIGS. 9 to 13 moved to the left. As a result of this Displacement movement of the drive shaft 10, there is a decoupling of the clutch plates 12 and 13 and thus to a separation of the slip clutch 7, which allows the already above-described free movement of the rack 5. This release order is in the Figures 11 and 13 shown.

A pivoting movement of the pivoting element 14 is on the other side by means of a tool 42 to accomplish. This tool 42, which can also be referred to as a trigger element, is in the case of use through the gap 23 between the machine door 2 and the washing container 1 on the top side covered lid 22 to lead (compare FIG. 2 ). The tool 42 may, as in the FIGS. 10 to 11 shown to be formed as a flat material. It actually carries a bevel 43 which cooperates with an inclined surface 41 of the pivot member 14. Upon insertion of the tool 42 in the direction of the arrow 48, the chamfer 43 of the tool 42 comes into contact with the surface 41 of the pivoting element 14. In this case, the tool 42 is based with respect to the plane of the drawing after the Figures 10 and 11 on the right side on the housing 40 of the door closure 9. As a consequence, a further movement of the tool 42 in the direction of the arrow 48 results in a pivoting movement of the pivoting element 14, which leads to a movement of the drive shaft 10 in the direction of the arrow 44 (cf. FIG. 13 ), so that there is a separation of the clutch plates 12 and 13 in the manner already described above.

The Figures 14 . 15 and 16 show with respect to the pivot member 14 an alternative embodiment. The pivoting element shown here has a triangular base body, which is formed pivotable about a rotation axis 15. The pivoting element 14 is equipped with a bolt 45 which cooperates with the tool 42 in Notentriegelungsfall. The operation is otherwise identical to the previously described.

The rack 5 has on its longitudinal sides over clearances 31, such as from the Figures 9 . 10 and 11 results. The outlet or inlet slopes of these clearances 31 interact with actuators 30 of the load switch 29 and the signal switch 32 together. This ensures that both during a motorized movement of the rack 5 and during a movement of the rack 5 via the release mechanism 8 in an emergency release an operation in particular of the load switch 29 takes place. The load switch 29 is coupled to the circulation pump of the machine, so that it comes with a corresponding actuation of the rack 5 to a switching on and off of the circulation pump. In the case of an emergency unlocking the circulating pump is effected in this way.

Overall, it follows that only a flat tool 42 is necessary to trigger the emergency release, which has a rounding or bevel 43 on the front side. By the front-side insertion of the tool 42 between the cover 22 and the automatic door 2, the pivot member 14 is deflected about the bearing 15, whereby a sliding movement of the drive shaft 10 is effected, as a result of which the slip clutch 7 is disengaged, thus creating a freewheel for the rack 5 becomes. In this state, the automatic door 2 can be opened and pulled forward together with the rack 5, wherein the rack 5 cooperates with the load switch 29 for automatic shutdown of the circulating pump.

LIST OF REFERENCE NUMBERS

1

rinse tank

2

automatic door

3

Kloben

4

Klobenfalle

5

rack

6

electric motor

7

slip clutch

8th

release mechanism

9

door lock

10

drive shaft

11

output shaft

12

clutch disc

13

clutch disc

14

pivoting element

15

axis of rotation

16

spring force

17

shaft

18

guide channel

19

longitudinal direction

20

gearing

21

pinion

22

cover

23

gap

24

transmission

25

gearing

26

locking sleeve

27

spring element

28

transversely

29

Circuit Breakers

30

actuator

31

franking

32

signal switches

33

arrow

34

wing

35

Hall sensor

36

swivel

37

arrow

38

arrow

39

arrow

40

casing

41

area

42

Tool (trigger element)

43

chamfer

44

arrow

45

bolt

46

leaf spring

47

extension

48

arrow

Claims (13)

1. Door lock, in particular for commercial cleaning and/or disinfection machines, comprising a clamp (3) that is arranged on a machine door (2) which is designed such that it can pivot, and a clamp catch (4) which cooperates with the clamp (3), the clamp catch (4) being arranged at one end of a gear rack (5), and comprising a motor (6), by means of which the gear rack (5) can be moved in a motorised manner, a slip clutch (7) being arranged between the motor (6) and the gear rack (5),
   characterised by
   an unlocking mechanism (8) which cooperates with the slip clutch (7) and by means of which the slip clutch (7) can be manually transferred into a free-running position when the machine door (2) is closed.
2. Door lock according to claim 1, characterised in that
   the slip clutch (7) is formed between a drive shaft (10) on the motor side and a driven shaft (11) on the gear rack side.
3. Door lock according to claim 2, characterised in that
   the drive shaft (10) is designed to be longitudinally movable relative to the driven shaft (11).
4. Door lock according to either claim 2 or claim 3, characterised in that the drive shaft (10) is guided by means of a pin (17) such that it can move longitudinally in a guide channel (18) provided by the driven shaft (11).
5. Door lock according to any of the preceding claims 2 to 4, characterised by a spring element (16) by means of which the drive shaft (10) is biased relative to the driven shaft (11).
6. Door lock according to any of the preceding claims, characterised in that
   the unlocking mechanism (8) comprises a pivotally mounted pivot element (14) which cooperates with the drive shaft (10) counter to the spring force (16) produced by the spring element (27).
7. Door lock according to claim 6, characterised in that
   the pivot element (14) cooperates with a release element (42) which can be actuated manually from outside the cleaning and/or disinfection machine.
8. Door lock according to any of the preceding claims, characterised by a load switch (29) which is used to switch a circulating pump of the cleaning and/or disinfection machine on and off.
9. Door lock according to claim 8, characterised in that
   the load switch (29) cooperates with the gear rack (5) which comprises switching means for actuating the load switch (29).
10. Door lock according to claim 9, characterised in that
    the switching means are apertures (31) and/or cams.
11. Cleaning and/or disinfection machine comprising a washing container (1) of which the washing container opening can be closed by means of a pivotally formed machine door (2), and comprising a door lock according to any of the preceding claims.
12. Machine according to claim 11, characterised in that
    the unlocking mechanism (8) is part of the door lock which is arranged on the top of the washing container (1).
13. Machine according to either claim 11 or claim 12, characterised in that
    the unlocking mechanism (8) is accessible via a gap (23) between the washing container (1) and a lid (22) supported by the washing container (1).

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