Land vehicles: bodies and tops – Bodies – Seats with body modifications
Reexamination Certificate
2000-02-23
2001-05-22
Pedder, Dennis H. (Department: 3612)
Land vehicles: bodies and tops
Bodies
Seats with body modifications
C296S065010, C248S503100
Reexamination Certificate
active
06234552
ABSTRACT:
FIELD AND BACKGROUND OF THE INVENTION
The invention relates to a fastening device for seats, seat benches or the like on the floor of a motor vehicle or the like, with a floor-mounted locking dog with a blocking projection spaced apart from the floor and with a fastener, having a blocking slide with a capture opening for the locking dog, which blocking slide can be displaced, in a manner controlled by means of a trigger, out of an open position into a fastening position, in which it engages under the blocking projection by means of the opening edge.
A fastening device of the above-mentioned type forms the subject matter of a patent application 197 53 538.0, which is not a prior publication, a locking member being provided which holds the blocking slide in the release position during decoupling by positive interengagement. The locking dog, for its part, is provided with a mushroom head which interacts with the blocking slide in the manner of a bayonet-type joint, more specifically by means of actuation of the locking member by a projection on the vehicle floor.
SUMMARY OF THE INVENTION
The subject matter of the invention is based on the object of configuring a fastening device of the introductory-mentioned type in such a way that installation tolerances are compensated for by a large-dimensioned capture opening in the blocking slide and that firm, rattle-free interconnected engagement between the locking dog and the blocking slide is nevertheless achieved.
This object is achieved first of all and essentially in a fastening device of the introductory-mentioned type wherein a clamping member is provided which, in the fastening position, enters the displaced capture opening and wedges against the locking dog.
The significant advantage of the configuration according to the invention is that larger installation tolerances can be compensated for and a stable connection between the fastener on the seat and the locking dog on the vehicle floor can nevertheless be achieved. As soon as the locking dog has passed through the capture opening in the blocking slide, the said opening being larger in relation to the outline of the said dog, the blocking slide returns under spring loading into its blocking position. The clamping member is concomitantly released, moving into a wedging clamping position relative to the locking dog. Here, the clamping member can be supported on that rim edge of the capture opening which lies opposite the opening edge, the blocking slide being held in a clamping position relative to the locking dog, which also excludes return displacement of the blocking slide into its release position. In detail, the clamping member is constructed in such a way that it forms a wedging surface by means of which it acts on a likewise wedge-shaped mating surface of the locking dog. The wedging surface and the mating wedging surface preferably slope at the same angle. Stable fixing of the seat in the second dimension is achieved by virtue of the fact that the wedging portion of the clamping member is plastic-coated and the mating surface of the locking dog forms toothing extending in the direction of displacement. When the wedging surface and the mating wedging surface move up against one another, digging in accordingly occurs, bringing about interconnected engagement transversely to the direction of displacement of the blocking slide. Provision is made for the clamping member to enter the capture opening under spring loading after corresponding displacement of the blocking slide. The clamping member is provided with a stand-by position by being supported on the broad face of the blocking slide in the open position. As soon as the blocking slide is displaced into its blocking position when the locking dog enters the capture opening, the clamping member is deprived of support on the broad face after a corresponding displacement distance, allowing it to enter the capture opening under spring loading and receive support on the mating surface of the locking dog with its wedging surface. To enable the vehicle-mounted fastener to be released from the locking dog, the clamping member can be dragged along out of its clamping position by a pivotable opening lever, the pivoting of which effects displacement of the blocking slide back into the open position. It should furthermore be emphasized that the clamping member is constructed as a clamping slide. The guide for the latter is situated on the fastener housing. Provision is then made for a trigger to sense the end face of the locking dog. After a corresponding entry distance of the locking dog into the fastener, the trigger brings about release of the blocking slide, which moves under spring action into its position of engagement behind the locking dog. To obtain anchoring between the locking dog and the fastener in the third dimension as well, another clamping member is provided and, in the fastening position, this moves up against the end and wedges between the fastener housing and the end of the locking dog. This clamping member is configured as a rotary wedge. The rotary wedge concerned is displaced back out of the clamping position with the clamping slide during opening actuation. This is accomplished by means of a driver pin of the clamping slide, which driver pin projects with clearance through a driver opening in the rotary wedge and is taken along by the opening lever during the opening actuation. The latter accordingly performs a dual function, serving, on the one hand, to displace the blocking slide back and, on the other hand, to take the clamping slide along. To enable this to be accomplished, the blocking slide can be displaced into its open position by a lever arm of the opening lever. The blocking slide is held in this position by means of the trigger in its latching position. The trigger can be configured as a feeler. However, it is also possible to construct the trigger as a pivoted lever. In the latter version, it is advantageous in terms of control that the trigger holds the blocking slide in the open position by engagement in the capture opening. When the seat is placed on the vehicle floor, the locking dog moves the trigger out of the region of the capture opening, after which the blocking slide is released for its displacement into the position in which it engages behind. Finally, an advantageous feature consists in the trigger tensioning the blocking-slide displacement spring during its displacement under the action of the end face of the locking dog.
Another version is characterized by the fact that the blocking slide is displaced into the blocking position by the entry movement of the locking dog into the capture opening. This ensures at all times that the blocking slide enters into engagement with the locking dog, even in the event of stiffness, which can arise, for example, due to soiling etc. In detail, the situation here is such that the forcible displacement of the trigger, which passes through a free travel, is controlled. This means that the displacement of the blocking slide into its locking position takes place only when the trigger has passed through the corresponding free travel. The blocking slide can thus not attempt to move into its blocking position too early. The forcible control is achieved in a simple manner by virtue of the fact that the trigger, which is constructed as a pivoted lever, travels freely in the same direction as the entry movement and, in the process, its spindle is guided in a rotation-inhibited manner in a housing slot which, at the end, forms a pivoting clearance, with the result that a driving arm of the pivoted lever displaces the blocking slide into its blocking position. Only when the spindle has traversed the housing slot and is at the level of the pivoting clearance can the pivoted-lever trigger pivot under the control of the locking dog, simultaneously taking along the blocking slide into its blocking position. For this purpose, the driving arm has a pin which engages in a driver slot extending transversely to the direction of displacement of the blocking slide. The pin/slo
Farber Martin A.
Murray Mickki D.
Pedder Dennis H.
Witte-Velbert GmbH & Co. KG
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