EP4335996A1 - Closing assembly for a door and door with closing assembly - Google Patents

Abstract

Locking assembly for a door of a temperature control room, in particular for the door of a cold room, with an actuating handle arranged on a cold room door so as to be rotatable about an axis of rotation, and with a base of the actuating handle, which projects axially relative to the door leaf and from which a handle part which is axially spaced from the door leaf arises radially, whereby the locking assembly experiences a torque for locking and unlocking the door and tensile and compressive forces act on the handle part to swing the door open and closed, characterized in that the handle part is interchangeably fixed to the base.

Description

The invention relates to a locking assembly for a door of a temperature control room, in particular for the door of a cold room, which has an actuating handle arranged on a cold room door so as to be rotatable about an axis of rotation and with a base of the actuating handle which projects axially relative to the door leaf and which extends radially axially from the door leaf spaced handle part originates, wherein the locking assembly experiences a torque for locking and unlocking the door and tensile and compressive forces act on the handle part to swing the door open and closed

For temperature control rooms that maintain a constant temperature in their interior compared to the outside environment, for example cold rooms, there are essentially two types of locking assemblies.

The first locking assembly, which is less relevant to this invention, has a pull handle on the outside and a push handle on the inside. A bolt connecting both handles is usually mounted in the door leaf, which can use a further mechanism to pull a spring-loaded latch back into the door leaf, which in the extended state engages behind a strike plate to keep the door closed.

The second type of locking assembly is commonly referred to as a twist-press lock. On the inside of the door and on the outside of the door there is a rotatably mounted handle bar, with both handle bars being connected to one another via a bolt passing through the door leaf. A locking bolt is coupled to the rotary handle on the inside. In a closed position, this engages behind a striking plate and is moved into an open position by turning the door handle and the axis of rotation defined by the connecting bolt.

When locking the door by turning the handle bar, the locking bolt is moved behind the striking plate, whereby the door leaf is pressed against a seal. The handle bars are therefore exposed to comparatively high torques when opening the door, but especially when closing it. In addition, the handle bars experience a tensile or compressive force in order to pivot the temperature control room door into the open or closed position. Generic locking assemblies are, for example, in DE 10 2020 133 557 A1 or the DE 10 2021 102 245 A1 disclosed. Twist-press closures have proven themselves in every respect for temperature control rooms and have been used widely for decades.

However, there is an increasing need to make generic locking assemblies adaptable both in terms of different technical requirements and in terms of external design.

The task is initially solved by a locking assembly with the features of claim 1, in particular with its characterizing features, according to which the handle part is attached to the base in an interchangeable manner.

The interchangeable handle part on the base offers a whole range of advantages. From a technical point of view, it is now possible for the first time to use handle parts of different lengths and thus change the effective lever length. For example, the appropriate handle part can be selected depending on the contact pressure required when closing the door. For example, you can imagine using the same base for large refrigerator doors but also for smaller oven doors, by choosing handle parts of different lengths to increase the force to be applied by the user but to unify. In bakeries, for example, this has the great advantage that the operators there can not only use a uniform locking system for cold rooms and ovens, but also the opening and closing forces for cold rooms and ovens are identical. The application of too much or too little force and the resulting incorrect operation are thus reliably avoided.

Furthermore, the locking assembly can now be individualized for the customer by replacing the handle part, so that instead of a uniform locking assembly for all users, user-specific variants can be produced by customizing the handle part.

A preferred embodiment is characterized in that a radially directed mandrel arises from the base and that the handle part forms a receptacle for the mandrel, in which the mandrel is mounted in a form-fitting manner.

The positive connection between the mandrel and the handle part proposed here is particularly suitable for transferring the forces that arise when the handle part is moved and are required for the function of the locking assembly to the base part and thus ultimately to a locking element.

In an alternative embodiment, however, it is entirely conceivable that the base has a recess or recess which positively accommodates an end portion of the handle part near the base.

In order to transmit tensile and compressive forces when the door is swung open and closed, the mandrel is provided with an axially pointing support bar connected to the base.

The mandrel has greater stability in relation to the torques to be transmitted if the mandrel has support webs in the circumferential direction of the base that are connected to the base.

The tensile forces that prevail when the door is swiveled open apply a certain tilting moment to the handle and the mandrel, which can be absorbed, for example, by providing the base with a radially pointing support surface, which is opposite a counter-support surface of the handle part, in particular the end surface of the handle part near the base ,
In order to avoid damage, particularly in the case of a handle part made of plastic in conjunction with a base made of plastic, it is provided that an elastomer is arranged between the support surface and the counter-support surface.

The object of the invention is also achieved by a locking assembly with the features of independent claim 7, in particular with its characterizing part, according to which the anchor section of the locking bolt in the base can assume different mounting positions and the radial projection of the locking section relative to the base depending on the mounting position of the anchor section varies.

The locking bolt designed according to the invention can be changed in terms of its projection relative to the base in the radial direction, i.e. reduced or lengthened, after the locking assembly has been mounted on the door leaf. In this way, the position of the locking bolt can be adjusted relative to the striker plate located on the door frame and any dimensional, manufacturing and assembly tolerances with regard to the distance between the locking assembly and the striker plate can be corrected. A This ensures that the locking bolt on the striking plate can be securely gripped behind in any case.

Changing the assembly position is particularly easy if the anchor section is provided with radially pointing elongated holes, through which fastening means pass through for arranging the anchor section in the base and along which the anchor section is mounted in the base so as to be displaceable in the radial direction in order to assume different assembly positions.

In addition to a stepless change in the mounting position with a non-positive fixation of the locking bolt in the base, it is also conceivable that the anchor section and the base have mutually corresponding positive locking elements that mesh with one another in the respective mounting position. A positive fastening has the significant advantage that an unintentional change in position of the locking bolt, for example due to collision with objects when entering or leaving the temperature control room, is reliably avoided.

Particularly preferred is an embodiment in which the radially outer end of the locking section is provided with a spring-loaded latch.

Such a spring-loaded latch has the significant advantage that a refrigerator door can also be closed by slamming it shut when the locking assembly is in its closed position. During the closing process, the latch is first pushed through the striking plate into the locking bolt and, after passing through the striking plate, is extended again by a spring element.

Of course, it can also be provided for a locking assembly with the features of independent claim 7 that the handle part is interchangeably attached to the base. The connection between the handle part and the base can be designed analogously to the embodiments of claim 1.

Finally, the invention also relates to a temperature control room door with a door leaf pivotably mounted in a door frame of a temperature control room, in particular a cooling room, with a door rebate and a corresponding frame rebate, a door seal being arranged in the door rebate and/or the frame rebate, with a striking plate arranged on the door frame , characterized in that a locking assembly according to one of claims 1 to 6 is arranged on the outside of the door and a locking assembly according to one of claims 7 to 11 is arranged on the inside of the door.

Figur 1

eine erste Explosionsansicht der Schließbaugruppe mit dem Betrachter zugewandter Innenbasis,

Figur 2

eine zweite Explosionsdarstellung der erfindungsgemäßen Schließbaugruppe mit dem Betrachter zugewandten Außenbasis,

Figur 3

eine Rückansicht der Außenbasis mit aufgesetztem Griffteil,

Figur 4

eine Frontansicht der Außenbasis mit aufgesetztem Griffteil,

Figur 5

eine Explosionsansicht auf den innenliegenden Teil der erfindungsgemäßen Schließbaugruppe auf die Frontseite,

Figur 6

die Explosionsdarstellung gemäß Figur 5 in rückwärtiger Ansicht.

Further advantages of the invention and a better understanding of it result from the following description of an exemplary embodiment. Show it:

Figure 1

a first exploded view of the locking assembly with the inner base facing the viewer,

Figure 2

a second exploded view of the locking assembly according to the invention with the outer base facing the viewer,

Figure 3

a rear view of the outer base with attached handle part,

Figure 4

a front view of the outer base with attached handle part,

Figure 5

an exploded view of the internal part of the locking assembly according to the invention on the front,

Figure 6

the exploded view according to Figure 5 in rear view.

In the figures, a locking assembly is provided with the reference number 10 as a whole. The ones in the Figures 1 and 2 Locking assembly 10, shown in different exploded views, is constructed in two parts. It initially comprises a first base 11, which is also referred to as an outer base. This sits with its back 12 on a door surface, preferably on the outside of the door. It is mounted there so that it can rotate about a geometric axis of rotation D and protrudes from the door surface in the axial direction of the axis of rotation D.

The first base 11 carries a first handle part 13, also referred to as an external handle, and distances this from a door leaf, not shown. For this purpose, the first handle part 13 is fixed in the area of the front side of the first base 11 facing away from the rear.

The first handle part 13 is detachably arranged on the first base 11. For this purpose, the first base 11 has a radially directed mandrel 14, which is received by a mandrel receptacle 15 of the first handle part 13 with a complementary shape. Fastening means 16, in the form of screws, serve to fasten the first handle part 13 to the mandrel 14 of the first base 11. The complementary shape of the mandrel 14 in the mandrel holder 15 ensures secure torque transmission from the first handle part 13 to the first base 11.

The first mandrel 14 has a first support bar 17. This support bar 17 originates from the first mandrel 14 axially in the direction of the back 12 of the first base 11 and is supported on the outer circumference of the first base 11. Compressive forces applied to the first handle part 13 in Direction of the door leaf, not shown, or in the direction of the plane spanned by the back 12 of the first base 11 are intercepted by the first support bar 17 and safely transmitted to the first base 11. In this way it is ensured that the door (not shown) can be closed without causing damage by exerting pressure on the first handle part 13.

Finally, the base 11 forms a first, radially pointing support surface 18, which corresponds to a first counter-support surface 19 arranged at the end of the handle part 13 near the base. When the door (not shown) is swiveled open, a tensile force is applied to the first handle part 13 away from the plane foamed by the back 12 of the first base 11, which, among other things, is absorbed by the pairing of the first support surface 18 and the first counter-support surface 19 and via the first Base 11 is transferred to the door.

A first elastomer member 20 is arranged in a gap between the first support surfaces 18 and 19, at least in one embodiment of the first handle part 13 and the first base 11 made of plastic. In this way, dimensional tolerances can initially be compensated for, but in particular damage to the base 11 and/or handle part 13 under the load of tensile forces in the area of the surface pairing of the support surfaces 18 and 19 is avoided.

The locking assembly 10 shown also includes a second base 41 with a second handle part 43, an inner handle, which is designed essentially analogously to the component arrangement described above.

Here too, the second base 41 is arranged with its back 42 so that it can rotate on a door leaf, not shown, so that it can rotate about the geometric axis of rotation D. The second base 41 will also be used later Inner base 41 designated. A second handle part 43, the inner handle, is fixed to the second base 41. For this purpose, a second mandrel 44 also arises from the second inner base 41, which sits in a second mandrel receptacle 45 of the second handle part 43 and is fixed to the second handle part 43 via fastening means 46 in the form of screws. The second mandrel 44 also forms an axially directed second support bar 47, which corresponds to the first support bar 17 in design and function.

A second support surface 48 on the second base 41 corresponds to a second counter-support surface 49 of the second handle part 43 in the manner already described for the first handle part 13, whereby a second elastomer member can also be inserted here in the case of a plastic version.

For the implementation of the invention, it is irrelevant whether the locking assembly includes both the components 11 - 20 just described and the components 41 - 50 described or is only formed by the components 11 - 20 or the components 41 - 50.

In addition, an embodiment of the invention with a plastic base 11/41 and plastic handle part 13/43 is shown. If other materials are used, for example at least one base made of metal, with appropriate stability z. B. the support bar 17/47 can be dispensed with.

At first in the Figures 1 and 2 In the illustrated embodiment of the locking assembly 10, the door leaf, not shown, is penetrated by a driving pin, which forms the physical axis of rotation of the bases 11 and 41 and couples the bases 11 and 41 to one another in a rotationally fixed manner.

The second base 41 is provided with a radially accessible channel 51 or blind hole 51, in which a locking bolt 52 is accommodated. This special design of the second base 41 will be discussed in detail later.

The Figures 3 and 4 show a representation of base 11/41 and handle part 13/43 mounted together. Like the view on the back 12/42 of the base 11/41 in Figure 3 shows, the mandrel receptacle 15/45 of the handle part 13/43 receives the mandrel 14/44 in a form-fitting manner, so that a closed, rear surface of the handle part 13/43 is formed.

The one showing the front view of the unit consisting of base 11/41 and handle part 13/43 Figure 4 shows the internal structure of the handle part 13/43. The handle part 13/43 is not solid in the present exemplary embodiment, but rather as a hollow body that is provided with various stiffening webs to dissipate force. These form node points axially in front of the mandrel 14/44, through which the fastening means 16/46, not shown here, are passed in order to fasten the handle part 13/43 to the mandrel 14/44.

In a gap between the handle part 13/43 and the base 11/41 between the support surfaces 18/48 and 19/49, an elastomer member 20/50 is arranged, which absorbs and supports the tilting moments of the handle part 13/43 when opening a door (not shown). the base 11/41 transmits.

The Figures 5 and 6 show an exploded view of the inner base 41 and the inner handle 43 in view of the front side ( Figure 5 or back Figure 6 ).

It can first be seen from both illustrations that - as already mentioned - the inner handle 43 can be detachably arranged on the inner base 41 via fastening means 46.

However, the focus here should be on the channel 51 and the locking bolt 52 in order to explain its advantageous design in more detail in the sense of the invention.

How from particular Figure 5 As can be seen, the locking bolt 52 has two elongated holes 53 arranged one behind the other in the radial direction, which are arranged in its anchor section 54. These anchor sections 54 are intended to be immersed in the channel 51. The anchor section 54 is fixed there via two fastening bolts 55. The anchor section 54 can be fixed in different assembly positions with regard to its radial immersion depth, with the elongated holes 53 defining the maximum immersion depth or the maximum extension position of the anchor section 54 in the channel 51 via their unspecified end stops.

The radial projection of the locking section 56 of the locking bolt 52 can be defined by the radial displaceability of the anchor section 54 within the channel 51. In this way it can be ensured that the locking section 56 securely locks behind the striking plate, not shown, regardless of material and assembly tolerances.

In a preferred embodiment, the locking bolt 52 can be provided with a spring-loaded latch at its free end facing away from the inner base 41 in order to be able to reach behind the striking plate even in the closed position when a door is slammed or closed. The locking bolt shown here in illustrations 1 and 2 as well as 5 and 6 has a latch receiving space 57 at its free end, which has a closure plug 58 (see Figures 1 and 2 ) is closed if a trap is not used. However, if a latch is to be arranged on the locking bolt 52, this can be done These are inserted into the trap receiving space 57 instead of the closure plug, so that one and the same locking bolt 52 can be used both with and without a trap.

The Figure 6 It can then be seen that the locking bolt 52 has a positive locking contour 59 in the area of its anchor section 54, which has a plurality of positive locking elements of ribs aligned parallel to one another. Within the channel 51 there is a counter contour into which the positive locking contour 59 of the locking bolt 52 engages in order to create a positive connection when fastening the locking bolt 52 in the selected mounting position in the channel 51 and to prevent the locking bolt 52 from being pushed inadvertently into the channel 51. In this way it is ensured that the selected mounting position of the locking bolt 52, in particular the radial projection of the locking section 56, is secured with respect to the striking plate after the adjustment has been made and the locking function is guaranteed.

Finally, it should be noted that the front side of the handle parts 13/43 of the locking assembly 10, which are shown open throughout, is provided with an attachable cover after attachment to the mandrel 14/44 of the base 11/41 in order to create a continuously closed front surface offer.

The lock assembly 10 is used to be placed on a refrigerator door. By means of the locking assembly 10, the refrigerator door can be locked and unlocked and opened and closed. For this purpose, the outer base 11 is fixed on the outside of the door and the inner base 41 is fixed on the inside of the door. Both bases 11/41 are rotationally connected to one another by a driver pin, so that a rotational movement of the outer base 11 results in a rotational movement of the inner base 41 and vice versa. In this way you can see from the outside move the locking bolt 52 between its open position and its closed position.

The invention first shows in a highly advantageous manner the possibility of being able to provide a base 11/41 with different handle parts 13/43 both in terms of technical requirements and in terms of individual design requirements, in which the handle parts 13/43 can be detachably attached to the base 11/ 41 can be arranged.

In addition, the invention shows how the locking bolt 52 of the inner base 41 can be fixed in a variable position in order to be able to compensate for manufacturing and assembly tolerances relative to the striking plate. Finally, it was shown that one and the same locking bolt 52 can be used to enable latched and latched closure. It is of course also conceivable that different locking bolts 52 can be accommodated by the inner base 41.

All in all, a modular locking assembly 10 adapted to individual needs and individual assembly and operating situations was revealed.

REFERENCE SYMBOL LIST

10

Locking assembly

11

first base/outside base

12

Back of 11

13

Handle part / outside handle

14

first thorn

15

first thorn recording

16

Fasteners

17

first support bar

18

first support surface

19

first counter support surface

20

first elastomer member

D

Axis of rotation

41

second base/inside base

42

Back of 41

43

second handle part / inner handle

44

second thorn

45

second mandrel holder

46

Fasteners

47

second support bar

48

second support surface

49

second counter support surface

50

second elastomer member

51

Channel / blind hole

52

locking bolt

53

Long hole

54

Anchor section of 52

55

Fastening bolts

56

bar section

57

Trap recording room

58

Closing plug

59

Form-fitting contour

Claims (12)

Locking assembly (10) for a door of a temperature control room, in particular for the door of a cold room, - with an operating handle arranged on a refrigerator door so as to be rotatable about an axis of rotation (D), - with a base (11) of the operating handle, which projects axially relative to the door leaf and from which a handle part (13) axially spaced apart from the door leaf arises radially, the locking assembly (10) experiencing a torque for locking and unlocking the door and for opening it. and swinging the door closed, tensile and compressive forces act on the handle part (13), characterized in that the handle part (13) is attached to the base (11) in an interchangeable manner. Locking assembly (10) according to claim 1, characterized in that a radially directed mandrel (14) arises from the base (11) and that the handle part (13) forms a receptacle (15) for the mandrel (14), in which the mandrel ( 14) is mounted in a form-fitting manner. Locking assembly (10) according to claim 2, characterized in that the mandrel (14) is provided with an axially pointing support bar (17) connected to the base (11). Locking assembly (10) according to claim 2, characterized in that the mandrel (14) arises in the circumferential direction of the base (11) from support webs which are connected to the base (11). Locking assembly (10) according to one of the preceding claims, characterized in that the base (11) is provided with a radially pointing support surface (18) which has a counter-support surface (19) of the handle part (13), in particular the end surface near the base Handle part is opposite, the support surface (18) and counter-support surface (19) being supported against each other under the influence of tensile forces acting on the handle part (13). Locking assembly (10) according to claim 5, characterized in that an elastomer (20) is arranged between the support surface (18) and the counter-support surface (19). Locking assembly (10) for a door of a temperature control room, in particular for the door of a cold room, - with an operating handle arranged on a refrigerator door so as to be rotatable about an axis of rotation (D), - with a base (41) of the operating handle, which projects axially relative to the door leaf and from which a handle part (43) axially spaced apart from the door leaf arises radially, the locking assembly (10) experiencing a torque for locking and unlocking the door and for opening it. and swinging the door closed, tensile and compressive forces act on the handle part (43), - with a locking bolt (52) which is mounted in the base (41) with an anchor section (54) and which arises radially from the base (41) with a locking section (56) and is intended to grip behind a striking plate, characterized in that - the anchor section (54) of the locking bolt (52) can assume different assembly positions in the base (41), - The radial projection of the locking section (56) relative to the base (41) varies depending on the mounting position of the anchor section (54). Locking assembly (10) according to claim 7, characterized in that the anchor section (54) is provided with radially pointing elongated holes (53) through which fastening means (55) for Arrangement of the anchor section (54) in the base (41) and along which the anchor section (54) is mounted in the base (41) so as to be displaceable in the radial direction in order to take up different assembly positions. Locking assembly (10) according to claim 7 or 8, characterized in that the anchor section (54) and the base (41) have mutually corresponding positive locking elements which engage one another in the respective assembly position. Locking assembly (10) according to one of claims 7 to 10, characterized in that the radially outer end of the locking section (56) is provided with a spring-loaded latch. Locking assembly (10) according to one of claims 7 to 10, characterized in that the handle part (13/43) is attached to the base (11/41) in an exchangeable manner. Temperature control room door with a door leaf pivotably mounted in a door frame of a temperature control room, in particular a cooling room, with a door rebate and a corresponding frame rebate, a door seal being arranged in the door rebate and/or the frame rebate, with a striking plate arranged on the door frame, characterized in that a locking assembly (10) according to one of claims 1 to 6 is arranged on the outside of the door and a locking assembly (10) according to one of claims 7 to 11 is arranged on the inside of the door.

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