EP0377372B1 - Adjustable striker to be mounted on a frame, and lock provided therewith - Google Patents

Description

The invention relates to a keeper intended to be applied on the surface, on a door frame edge, of the type according to the preamble of claim 1.

US-A-1,793,115 shows a keeper of this type in which the bolt housing is provided in a plate fixed to the door frame. The movable stop consists of a movable plate under the action of a screw, the head of which is trapped between two fixed supports. The embodiment shown by this document, especially for fixed supports, needs to be improved from the point of view of mechanical strength. In addition, the imprisonment of the screw head between two bearing surfaces does not make it easy to drive the screw in rotation, and therefore the adjustment and, in practice, a play will exist between the screw head and the supports, game which will be found between the bolt and the neighboring edge of the strike housing.

US-A-1 463 384 shows a keeper arranged substantially in the thickness of the door frame and not on the side of the door. The strike is adjusted in the plane of the door and not perpendicular to it. The adjustment provided for in this document is intended to compensate for the play in the door rebates but does not make it possible to reduce, between the strike and the bolt, the play in a direction perpendicular to the mean plane of the door when it is closed, in order improve the efficiency of the lock.

The object of the invention is, above all, to provide a keeper of the type defined above which allows an easy and rigid adjustment of the keeper stop, in a direction perpendicular to the mean plane of the door, in order to pressurize this stop against the corresponding bolt in the closed position. We further wishes that the closure provided with such a keeper has high mechanical strength and that the keeper remains simple and economical to manufacture.

The invention relates more particularly, because it is in this case that its application seems to be of most interest, but not exclusively, a strike at several points, intended to be used with a lock with several bolts.

In the case of a lock with several bolts, correct installation requires that all the bolts, in the closed position, be simultaneously in contact with the corresponding supports of the strike.

According to the invention, a keeper intended to be applied as a wall light, of the type defined above, is characterized in that each housing for a bolt is formed in an external trunk suitable for being fixed on the frame; that this trunk has, at each housing, a cross section having a wall capable of being substantially parallel to the door when it is closed, and that the means for adjusting the stop comprise traction means bearing on said wall and capable of exerting traction from the stopper towards the wall, and thrust means, also bearing on the wall, capable of withstanding an opening force which would be transmitted to the bolt.

Generally, the keeper has several points corresponding to horizontal and / or vertical bolts, and each housing of the keeper corresponding to a bolt is equipped with the movable stop and means for adjusting this stop.

Advantageously, the trunk of the strike has a substantially U-shaped cross section, constant over its entire length.

The above traction means can comprise a screw passing through an opening in the wall of the trunk, and engaged in a tapped hole provided in the stop, this screw comprising a head located outside the trunk, this head being able to bear against the wall.

The pushing means advantageously comprise a screw entirely located inside the trunk, this screw cooperating with another tapped hole provided in the stop, while an opening is provided in the wall of the trunk, in alignment with the screw, this opening having a diameter less than the diameter of the head of the screw, but allowing the introduction of a tool for controlling this internal screw so as to bring its head into abutment against the internal face of the wall of the housing.

Preferably, a pulling screw and a pushing screw are provided on either side of the bolt.

The stop is advantageously constituted by a block comprising a recess forming a housing for the bolt while the parts situated on either side of this recess include the tapped holes for the aforementioned screws.

Advantageously, the pushing screws are of the cylindrical head type with hexagon socket; the push screws are of high mechanical strength.

The invention also relates to a lock equipped with such a strike.

• La figure 1, de ce dessin, est une vue partielle, en élévation, d'une gâche à plusieurs points, conforme à l'invention, posée sur l'encadrement d'une porte, munie d'une serrure à plusieurs pênes.
• La figure 2 est une section horizontale à plus grande échelle de la gâche au niveau d'une butée non réglée, suivant la ligne II-II, figure 1.
• La figure 3 est une section semblable à la figure 2, mais avec la butée réglée.
• La figure 4, enfin, est une coupe suivant la ligne IV-IV, figure 3.

The invention consists, apart from the arrangements set out above, of a certain number of other arrangements which will be more explicitly discussed below in connection with a particular embodiment described with reference to the attached drawing, but which is in no way limiting.

• FIG. 1, of this drawing, is a partial view, in elevation, of a striker at several points, according to the invention, placed on the frame of a door, provided with a lock with several bolts.
• Figure 2 is a horizontal section on a larger scale of the keeper at an unadjusted stop, along line II-II, Figure 1.
• Figure 3 is a section similar to Figure 2, but with the stop set.
• Figure 4, finally, is a section along the line IV-IV, Figure 3.

Referring to Figure 1 we can see a striker 1 at several points placed on a frame 2 on a door 3. This door is hinged on hinges of vertical axis (not shown) provided along the vertical side of the frame opposite to that provided with the strike. The door 3 is provided on its edge coming in the vicinity of the keeper 1, when the door is closed, of the lock 4 with several bolts; two horizontal bolts 5, 6 and a high vertical bolt 7 have been shown. Other horizontal bolts and a low vertical bolt can be provided.

The keeper 1 has a vertical part 1 a at several points, fixed on the vertical edge of the frame 2, for horizontal bolts such as 5, 6 and at least one horizontal part such as 1 b provided on the upper edge of the frame for the vertical bolt 7 high. A similar horizontal part would be provided for a low vertical bolt.

Parts 1 a and 1 b are arranged in the same way, at the level of the housings intended to receive the bolt, so that the description which follows will only concern part 1 a for horizontal bolts, but the same explanations are valid for a part such as 1 b associated with a vertical bolt.

The strike 1 includes, at each bolt, for example the bolt 5, a housing such as 8 intended to receive this bolt; an opening 9 is provided in the side wall of the keeper 1 to allow the bolt to enter the housing 8.

This housing 8 is formed in a trunk 10̸ advantageously constituted by a part with a U-shaped cross section whose wings 11 and 12 are vertical and orthogonal to the mean plane of the door 3 when this door is closed.

The wing 11 furthest from the door 3 bears by its edge 13 against the frame 2. The wing 12 has a width greater than that of the wing 11 so as to have a part 14 suitable for being fixed against the face of the frame 2 which is opposite the edge of the door 3 when the latter is closed.

The wings 11 and 12 are connected, at their end remote from the frame 2, by a wall 15 substantially parallel to the door 3 when it is closed. Fixing screws (not shown) pass through this wall 15 in an orthogonal direction and are screwed into the frame 2.

The strike includes, at each housing such as 8 for a bolt, a stop 16 provided inside the housing and mounted so as to be able to be moved, in a direction substantially orthogonal to the mean plane of the door 3 when it is closed, using adjustment means R which can be actuated from outside the trunk 10̸.

The adjustment means R comprise traction means T bearing on the wall 15 and suitable for exerting traction from the stop 16 towards said wall 15, and pushing means P also bearing on the wall 15, suitable for resisting an opening effort which would be transmitted to the bolt 5.

The traction means T comprise, for each stop 16, screws 17 for example the number of two located on either side of the bolt 5 and whose axes are located in a plane orthogonal to the axis of the bolt 5. These screws 17 pass through an opening 18 provided in the wall 15, and comprise a head 19 having a diameter greater than that of the opening 18 so as to be able to bear against the external zone of the wall 15 surrounding this opening 18. The screw 17, inside the housing 8, is engaged over part of its length in a hole threaded 20̸ provided in the stop 16.

The pushing means P comprise, for each stop 16, screws 21, with high mechanical strength, for example two in number, located on either side of the bolt 5 and substantially orthogonal to the mean plane of the door 3 when it's closed. The axes of the screws 21 are located in the same plane orthogonal to the axis of the bolt 5 in the closed position. The plane of the axes of the screws 21 in the embodiment shown in the drawing is parallel to the plane of the axes of the screws 17. As a variant, these two planes could be merged in which case the screws 21 would preferably be located between the screws 17.

The screws 21 are of the cylindrical head type 22 with hexagon socket. Each screw 21 is engaged in a tapped hole 23 of the stop 16. An opening 24 is provided in the wall 15 so as to be opposite the hexagon socket of the head 22. The diameter of this opening 24 is smaller to that of the head 22, but sufficient to allow the passage of a hexagon wrench to maneuver, from the outside, the screw 21. The head 22 can thus bear against the zone of the interior surface of the wall 15 surrounding the opening 24.

A recess 25 may be provided in the stop 16 at the outlet of the tapped hole 23 on the side of the wall 15, to receive the base of the head 22.

The stop 16 is constituted by a kind of metal block substantially in the shape of a rectangular parallelepiped, which has a recess 26 open in the direction of the frame 2 and whose wall 27, opposite this opening, has a shape which substantially matches that of the bolt 5 when it is in this recess.

That said, the use and adjustment of a keeper according to the invention are as follows.

The keeper 1 is mounted on the frame 2 of the door with the stops 16, associated with each housing 8, in their most remote position shown in FIG. 2.

The screw 21 is screwed as far as possible into the stop 16 so that the base of the head 22 is in abutment against the bottom of the housing 25. The existence of this housing 25 makes it possible to reduce the projection of the head 22 relative to the face of the stop 16 by a distance equal to the depth of said housing 25. The screws 17 are also screwed as much as possible into the stop 16 so as to apply the head 22 against the inner face of the wall 15.

The lock 4 having been installed on the door 3, this door is closed and the lock 4 is acted on so as to put it in the closed position so that the various bolts such as 5, 6 and 7 enter the corresponding housings 8 of the keeper and the recesses 26 of the associated stops 16.

Because the stop 16 occupies its most remote position, there is a clearance j (FIG. 2) between the bottom of the recess 26 and the associated bolt such as 5. To adjust the stop 16, associated with this bolt 5, we start by sufficiently unscrewing the screw 17 so as to move its head 19 away from the wall 15, as shown in phantom in FIG. 2.

Then, using a key introduced to through the opening 24, one acts on the screw 21, in the direction of unscrewing, so as to move the stop 16 from the wall 15 until the clearance j is completely caught up and the bolt 5 is set in pressure against the bottom 27, the head 22 being in abutment against the inner face of the wall 15.

The screw 17 is then tightened again until the head 19 comes to bear against the external face of the wall 15 as shown in FIG. 3.

We operate in this way for all the screws 21 and 17 associated with a stop 16.

When these operations are completed, the adjustment of the stop 16 is made. In the closed position, the bolt 5 bears against the bottom 27 of the stop 16.

When the bolt 5 is removed from the housing, the stop 16 remains in its adjustment position since it cannot move away from the wall 15 due to the restraint exerted by the screws 17, nor approach this wall 15 of the makes the action of the screws 21.

When these operations were carried out at all 16 stops associated with the various bolts, both parts 1 only 1 b of the striker 1, the setting is completed.

As appears from the foregoing explanations, the adjustment is made with the door closed, without taking any measures, and in an extremely rapid manner, without having to dismantle a part.

The solution of the invention can be suitable for all types of surface mounted strikes, even single point. The high mechanical strength screws 21 allow the forces likely to be exerted on the bolt to be cashed during an attempt to break into the door 3.

The adjustment stroke of the stop 16 is chosen so as to be sufficient for the most more unfavorable. It is estimated that an adjustment stroke (distance between the most distant position shown in FIG. 2 and the most advanced position) of approximately 12 mm makes it possible to satisfy practically all the situations likely to be encountered at the time of fitting the lock and strike.

The solution of the invention is particularly advantageous for doors with overlap, or in the case of offsets between door and frame. This solution also makes it possible to compensate for the collapse of a seal, in the event that such a seal is provided on the door.

Claims (9)

1. Strike plate adapted to be surface mounted on the edge of a door-frame, having at least one housing (8) adapted to receive a bolt of a lock mounted on the door (3), and, at each housing (8) provided for a bolt (5), having a stop (16) movably mounted in the interior of the housing with the aid of adjustment means (R) which can be actuated from the outside, the stop (16) being mounted so that it can be displaced in a direction substantially perpendicular to the median plane of the door (3) when it is closed, these adjustment means (R) being adapted in such a manner that, by actuation from the outside of the door, the stop (16) can be pressed against the corresponding bolt (5) in the closed position, and the stop can be locked in this position against an opening stress applied to the door (3) which would be transmitted to the bolt, characterised in that each housing (8) is formed in an external case (10) capable of being fixed to the frame, that, at each housing (8), the case (10) has a transverse section having a wall (15) which can be situated substantially parallel to the door (3) when it is closed, and that the adjustment means (R) of the stop comprise traction means (T) resting against the said wall (15) and capable of driving the stop (16) towards the wall (15), and thrust means (P), also resting against the wall (15) and capable of supporting an opening stress that would be transmitted to the bolt

2. Strike plate according to claim 1, characterised in that the traction means (T) comprise a screw (17) traversing an opening (18) in the wall (15) of the case, and engaged in a tapped hole (20) provided in the stop (16), this screw (17) having a head (19) situated to the exterior of the case (10), this head being capable of resting against the wall (15).

3. Strike plate according to claim 1 or claim 2, characterised in that the thrust means (P) comprise a screw (21) situated entirely in the interior of the case (10), this screw (21) cooperating with another tapped hole (23) provided in the stop (16), while an opening (24) is provided in the wall (15) of the case, aligned with the screw (21), this opening (24) having a smaller diameter than the diameter of the head (22) of the screw, but allowing for the insertion of a tool in order to control this inner screw (21) so as to bring its head (22) to rest against the inner face of the wall (15) of the housing.

4. Strike plate according to claims 3 and 4 in their entirety, characterised in that a traction screw (17) and a thrust screw (21) are provided on either side of the bolt (5).

5. Strike plate according to claim 3 or claim 4, characterised in that the thrust screws (21) are hexagon socket head (22) cap type screws.

6. Strike plate according to any one of claims 3 to 5, characterised in that the thrust screws (21) have high mechanical resistance

7. Strike plate having a plurality of points corresponding to horizontal bolts (5, 6) and or vertical bolts (7) according to any one of the preceding claims, in which each housing (8) of the strike plate is provided with a movable stop (16) and adjustment means (R) for this stop (16).

8. Strike plate according to any one of the preceding claims, characterised in that the case (10) has a substantially U-shaped transverse section, constant over its entire length.

9. Lock, characterised in that it is provided with a strike plate according to any one of the preceding claims.

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