Patent Application
20140210221
This invention relates to lock strikes, and specifically to a lock strike which in incorporated into the sliding door of a vehicle.
Vehicles, especially vans and delivery trucks, include sliding side doors which enable access to the interior. These sliding doors have a lock set which includes a latch mounted to the sliding door itself and a strike or strike plate mounted to the stationary sidewall or door jamb of the vehicle. The latch typically includes a catch which contacts and grasps onto a portion of the strike.
Lock sets having pivoting catch tongues have proven to be better than those having rotary tongues, as the pivoting tongue rides upon or floats upon the strike rather than tightly capturing the strike. This floating motion reduces the wear due to frictional contact between the tongue and strike vehicle vibration.
Another problem associated with lock sets is that on occasion the door may accidently slide to an open position if the lock set is not properly set or if a large enough force is placed upon it. As such, recently government regulations have mandated that vehicle lock sets include two stage latching capabilities to restrict accidental full opening of the door.
Accordingly, it is seen that a need exists for lock set strikes for a vehicle that includes a two-stage latching. It is to the provision of such therefore that exemplary embodiments of the present invention are primarily directed.
A vehicle lock strike for a latch having a reciprocally moving latch bar having a pawl comprises a main plate including a locking wall having a select height, and a second plate positioned closely adjacent to the locking wall and having a select height greater than the select height of the locking wall. With this construction, the latch lockably abuts the locking wall in a first position and lockably abuts the second plate in a second position.
With reference to the drawings, there is shown a latch 10 for a vehicle sliding door and a lock strike 11 embodying principles of the invention in a preferred form. The latch 10 is mounted to the sliding door of the vehicle while the lock strike is mounted to the stationary door jamb portion of the vehicle. The latch 10 may be the same as that shown in U.S. Pat. No. 5,979,949 the entire contents of which are commonly owned and incorporated herein by reference. The latch may also be one of the models sold under the model designation 4000 series by Kason Industries, Inc. of Shenandoah, Ga. In particular, the latch 10 includes a housing 14, a rotatable handle 15, and a latch bar 16 operably coupled with the handle so that the actuation of the handle causes one side of the latch bar to pivot upwardly against the spring biasing force placed upon the latch bar. The latch bar 16 has two oppositely disposed notches or catches 17 each of which defines a pawl 19 having a rounded end surface 20, an inclined camming surface 21, a bottom surface 22, and an inwardly facing stop surface 23.
The lock strike 11 includes a main plate 31 having a mounting wall or portion 32 and a locking wall or portion 33 extending generally perpendicular to the mounting wall 32. The mounting wall 32 has a plurality of mounting holes 34 which enable the lock strike 11 to be mounted to the vehicle body or jamb with corresponding bolts. The locking wall 33 includes a L-shaped tang 35 which has an inwardly facing catch surface 36, a top surface 37, and an outwardly facing gap surface 38.
The lock strike 11 also includes an auxiliary or second plate 41 coupled to the locking wall 33 through two bolts 42 and nuts 43. Alternatively, the second plate 41 may be coupled in any conventional fashion such as with welding or forming a second tang from either the mounting wall 32 or locking wall 33. The second plate 41 includes a top camming surface 46, a top end surface 47, and an inwardly facing catch surface 48. The second plate 41 is configured and mounted so that a gap 50 is created between the tang 35 and the second plate 41, i.e., a gap 50 exists between the tang gap surface 38 and the second plate catch surface 48. The top of the second plate 41 is positioned higher than the top of the locking wall 33. The gap 50 is configured to receive a lower portion of the pawl 19, as describe in more detail hereinafter.
It should be noted that the lock strike 11 is symmetrical about a horizontally extending centerline so that the lock strike may be inverted for either right or left sliding vehicle doors. Also, the lock strike has two opposing catches so that it is not only mountable on either side of the vehicle, but that it is also utilized with a second strike to maintain the door in an open position, i.e., one lock catch is coupled to one strike in a door closed position and the other lock catch is coupled to the second strike in a door fully open position to prevent the door from sliding from the fully opened position. The following description will refer to the door being locked in a closed position, however, the same description also is utilized for a locked fully open door position.
In use, as the sliding door is moved to a locked position the pawl inclined camming surface 21 contacts the second plate top camming surface 46, as shown in
Should one wish to open the door the handle is rotated thereby pivotally raising one end of the latch bar 26 depending on which direction the handle is rotated, as shown in
However, should the door be accidentally moved from its first locked position in the open direction, shown toward the right in
It is believed that the similar results may be achieved by having the top of the second plate a height greater than the top of the locking wall 33, as shown in the preferred embodiment, without the need for a gap therebetween. However, while the present invention covers such an alternative, this is not preferred as it is believed that the presence of the gap 50 allows the pawl to drop between locking wall 33 and second plate 41, thereby increasing the contact surfaces therebetween and reducing the height difference necessary between locking wall 33 and second plate 41 to arrest accidental door movement. Additionally, the absence of the gap would require a greater height difference between the locking wall and second plate to sufficiently catch the pawl, and thus would require that the latch bar 16 be moved to a higher position during unlocking to clear the latch locking wall 33 and second plate 41.
It should be understood that while the preferred embodiment shows a pivotal latch bar, other types of reciprocally moving latch bars may be included in the present embodiment, such as a latch bar that it moved vertically.
It thus is seen that a lock strike is now provided which overcomes problems associated with lock strikes of the prior art. While this invention has been described in detail with particular reference to the preferred embodiment thereof, it should be understood that many modification, additions and deletions, may be made thereto without departure from the spirit and scope of the invention as set forth in the following claims.
