Patent Application
20070158951
a) Field of the Invention
The invention is directed to a fastener for multiple locking of doors or wall portions in housings or cabinets, particularly for outdoor use, by means of a lockable actuation member such as a handle lever, comprising a drive toothed wheel which is connected to the actuation member that is supported in the door so as to be rigid against rotation and which engages with a lock rod which is supported in the door so as to be displaceable axially and which has teeth on at least one side, and with one or more lock elements which is/are held in the door so as to be rotatable or swivelable and which is/are coupled with the lock rod.
b) Description of the Related Art
U.S. Pat. No. 4,631,937 discloses a fastener arrangement for a cabinet door in which the locking process is carried out by means of a lockable actuation member such as a handle lever and which comprises a drive toothed wheel which is connected to the actuation member supported in the door so as to be rigid against rotation and which engages with a lock rod which is supported in the door so as to be displaceable axially and which has teeth on at least one side. However, the appearance of the lock elements which are to be actuated by the rod is not disclosed.
U.S. Pat. No. 4,747,628 discloses a locking arrangement for a strong box (safe) in which a locking rod having teeth on both sides is driven on one side by a toothed wheel that is actuated by a handwheel, while the other toothing drives a plurality of gear-shaped lock elements. Since the toothed wheel itself forms the lock element, its diameter must be very large. Neither a stop bevel nor a pull-in movement is provided. Consequently, the construction of this safe fastener is not suitable for cabinets with sealing strips. Therefore, it is not intended for outdoor use.
Also known to the present applicant is a construction in which a toothed locking rod that is driven by a toothed wheel of an actuation member drives lever-shaped lock elements which are articulated at the rod and which are held in the door so as to be swivelable. The space required for the lever articulation is disadvantageous.
It is the primary object of the invention to improve a fastener of the type mentioned above in such a way that it can be accommodated in a space-saving manner, enables a tightening or pull-in movement of the door and, therefore, sealing, and can be safeguarded against unwanted opening in a particularly reliable manner.
The above-stated object is met in that, for each lock element, a drive toothed wheel which is connected to the lock element so as to be rigid against rotation and which engages with the toothing of the lock rod is held on the door in a rotatable manner in order to couple the lock rod with the lock element or lock elements.
In this way, doors or lids having a plurality of lock elements enabling a pull-in movement can be closed, and the lock elements can be actuated in a space-saving manner by means of a central, lockable operating element. In particular, this type of fastener can be applied wherever high closing force must be overcome or long closing paths must be implemented when using corresponding sealing systems for protecting against weather, water and dust and/or electromagnetic shielding and wherever it is very important to prevent attempts at unauthorized opening.
In particular, a construction is made possible which is substantially narrower and better protected than is the case in a lever-type drive for the lock element.
In order to further economize on space it is advantageous, according to a further development of the invention, when the lock rod which is supported so as to be displaceable axially is guided in one or more separate metal guide parts or plastic guide parts. This offers the additional advantage that the arrangement operates more smoothly. This can also be achieved or enhanced by coating the guide parts with sliding agents.
It is particularly advantageous according to another construction of the invention when the lock rod which is supported so as to be displaceable axially is guided in an elongated metal profile or plastic profile. This provides excellent protection against external influences.
The compactness of the system is also benefited in an embodiment form of the invention in which a fastener lock is arranged on the toothed wheel (the driven toothed wheel and, optionally, the drive toothed wheel) so as to be rigid against rotation.
The fastener lock can comprise a bent and/or shaped sheet-metal lug which can be swiveled in behind a housing contour or cabinet frame contour by rotation.
In an even more advantageous manner, the fastener lock can also comprise a shaped or injection-molded plastic lug or metal lug which can be swiveled in behind a housing contour or cabinet frame contour by rotation.
It is also particularly advantageous when the fastener lock comprises a metal carrier part such as bent and/or shaped sheet-metal lugs or injection-molded plastic lugs or metal lugs on which a shaped part made of plastic or another material with favorable sliding properties is arranged and which can be swiveled in behind a housing contour or cabinet frame contour by rotation.
It has proven particularly favorable when the metal profile or plastic profile has a substantially U-shaped cross section which encloses the lock rod and toothed wheel and which increases protection against weather and tampering.
The U-shaped profile can be closed by a cover that can be arranged thereon, which further increases protection against dust, weather and attempts at tampering.
The actuation member advantageously comprises a swivel lever that can be folded into a trough arranged on the door.
For improved security against unauthorized attempts at opening, the trough advantageously comprises saw-proofing protection.
This saw-proofing protection can also be retrofitted into the inner contour of the trough. The saw-proofing protection is further improved in that the part that can be fitted subsequently is rotatably mounted.
It is advantageous when the trough comprises a lettering surface for displaying the rotating direction or other writing and/or symbols such as company logos. This type of lettering can be made particularly weatherproof.
For security reasons it is also advantageous when the trough has shallow sloping outer side walls that are difficult to grasp with gripping tools.
The invention will be explained more fully in the following with reference to embodiment examples shown in the drawings.
The teeth 24 of the toothed rod 20 can be whole or, as is shown in
By its lifting movement, the toothed lock rod 20 transmits the rotational movement of the drive toothed wheel 18 to the toothed wheels 26 of the driven side which are connected to the lock elements 22 in a positive engagement and/or frictional engagement. The guide of the toothed rod 24 can be held in an extruded profile 30 by separate guide parts made of metal (e.g., diecast zinc) or plastic (injection molded part) or by a shaped out portion 35.
The toothed wheel 18 driven by the hand lever 16 can also carry a lock element 22 at the same time, but it is simpler to spatially separate the drive and the driven toothed wheel 26—see the end of the driveshaft which lies below the driven part (opening 45) and is designated by reference number 41 in
Therefore, the arrangement in its entirety is very narrow so that the door leaf is substantially available for other purposes, e.g., for ventilation openings required for temperature control.
The lock element 22 can comprise a bent and/or shaped sheet-metal lug which can be swiveled in behind the housing contour or cabinet frame contour 36 by rotation. Alternatively, the lock element can also be made from a shaped or injection-molded plastic lug or metal lug 38 as is shown in
The metal profile or plastic profile 30, which also supports the toothed rod 20, can be a substantially shaped sheet-metal part with a substantially U-shaped cross section 42. This cross section encloses not only the lock rod but also the toothed wheel 18 or toothed wheels 26. This U-shaped profile can advantageously be closed by a cover 44 that can be placed thereon to ensure that it is tight against dust, for example. The driven toothed wheels and drive toothed wheels advantageously have the same shape and have, for example, a center square opening 46 which makes possible a rotatable bearing support on a round mandrel 48 of the bearing part 28 on the one hand, but is also suitable on the other hand as a receptacle for a square for connecting to a hand lever 16 so as to be rigid against rotation.
The toothed wheel 26 and lug 38, which are connected in a positive engagement by projections 34 of the lug 38 which can be received in recesses 32 of the toothed wheel 26, are held axially by means of a cap screw 50 which can be received in a threaded bore hole 49 formed by the mandrel 48.
Friction is reduced and the risk of damage to the counterbearing or bearing part 28 of the lock element 22 is eliminated by using a shaped part which is made of plastic or other materials having good sliding properties and which is attached to the metal carrier part of the fastener lock. In contrast, the use of a bent, shaped sheet-metal lug that can be swiveled in behind the housing contour by rotation until it covers the latter to the maximum extent (rotated by 90°) often has the disadvantage that it causes extensive friction resistance on the one hand and on the other hand enables only small pull-in paths and is accordingly less suited for doors having thick sealing strips 52.
Given suitable material properties, the fastener lock 22 can also be manufactured entirely from plastic or another suitable material.
Accordingly, the long stop curvature of the shaped part 40 according to
A swivel lever 16 which can be folded into a trough 54 arranged on the door serves as actuation member (see
The swivel lever 16 is supported on a driveshaft 56 so as to be swivelable around an axis 58 extending perpendicular to the driveshaft axis. The driveshaft 56 forms, or carries at its end facing inward, a square on which the drive toothed wheel 18 that is provided with a square hole 46 can be arranged in a positive engagement so that the drive toothed wheel 18 can be rotated, e.g., by 90° or more when rotating the swiveled out lever 16 around the axis of the driveshaft 56. In this way, the rod 20 is displaced and at the same time drives driven toothed wheels 26 in such a way that the latter rotate in turn, e.g., by 90°, and a tongue fastener 38 which is arranged on the driven toothed wheels 26 is rotated out of a release position parallel to the rod into a position, perpendicular to the rod at 90°, in which it engages behind the frame contour 36 of the cabinet.
In many applications it is desirable to indicate to the user the rotating direction of the actuation lever 16 that the user must select in order to open and close the fastener. A lettering area 60 indicated in
In many applications, particularly outdoors, unauthorized persons should be prevented from opening the cabinet. Therefore, it is usually useful to make the hand lever 16 lockable, for example, by means of a cylinder lock 62 which is arranged at the end of the hand lever 16 and whose cam engages behind a portion of the trough when the cylinder lock is in the locked position. The keyway may be protected by a cover 64. Additional security can be achieved by means of a padlock which can be inserted through an opening 66 of a lug 68. The lug extends through the hand lever 16 proceeding from the trough part and prevents the hand lever 16 from being folded out of the swiveled in position when the padlock is fitted through it. Saw-proofing protection 70 is provided in order to prevent this safeguard from being bypassed by sawing through the lever between the lug 68 and the hinge 58. This saw-proofing protection 70 comprises a pipe or the like which is made of a hard material and which can be glued into or rotatably supported in the reverse-trough-shaped cross section 72 of the hand lever 16, possibly also subsequently. In order to make it more difficult to grip the trough with pliers or the like, this trough has flat angles in its side walls 74 which makes it difficult to apply pliers because the jaws of the pliers would slip off.
The cover 44 of the U-shaped profile 30 has holes 45 to allow the base part 39 of the lug 38 to pass through (see
The cover 24 can be fixed in the U-shaped profile 42 by screws 43, 143. A protuberance 37 on the toothed wheel 18, 26 can serve to limit the rotational path, and a stop for the protuberance can project into a circular groove 29 formed by the bearing 28.
For the sake of compactness and strength, the toothed rack is supported (e.g., in the U-shaped profile) in such a way that it comes to rest between the door edge and the toothed wheel axis. Accordingly, the toothed rod is also particularly protected by the door bevel and the housing contacting the latter.
The invention is commercially applicable in switch cabinet construction.
While the foregoing description and drawings represent the present invention, it will be obvious to those skilled in the art that various changes may be made therein without departing from the true spirit and scope of the present invention.
| Number | Date | Country | Kind |
|---|---|---|---|
| 20319136.6 | Dec 2003 | DE | national |
This application claims priority of International Application No. PCT/EP2004/013694, filed Dec. 2, 2004 and German Application No. 203 19 136.6, filed Dec. 10, 2003, the complete disclosures of which are hereby incorporated by reference.
| Filing Document | Filing Date | Country | Kind | 371c Date |
|---|---|---|---|---|
| PCT/EP04/13694 | 12/10/2004 | WO | 6/8/2006 |
