EP0606938A1 - Security diverter for multi point lock system - Google Patents

Abstract

A deflector (diverter) for controlling a door lock, in which a plate (19) may be displaced within a housing (1-4) in an orthogonal direction with respect to a slot (5) in the housing, which plate is connected to a control rod and includes an inclinded slot (21), and a bolt (7) may be displaced in a longitudinal direction with respect to the housing, which bolt includes one end (8) projecting from the housing to engage the case of the door and it is provided with a peg (15) engaged in the two slots (5) of the housing and (21) of the displaceable plate. The bolt (7) includes a body and a sleeve, which are coupled together so that they can rotate but cannot be displaced with respect to each other in an axial direction; the end (8) of the bolt which is intended to engage the case of the door is secured to the body (7) of the bolt and it has a widened non-circular cross-section, and the peg (15) engaged in the slots of the housing and of the plate is mounted on the sleeve of the bolt; in addition, the body of the bolt (7) has a groove having a helical part extending around the bolt over an angle of close to 90@, in which groove there engages a peg (6) secured to the housing. In this way the bolt, during its closure travel, makes a rotation by means of which its widened non-circular end (8) positively engages the case of the door. <IMAGE>

Description

The present invention relates to a diverter for lock systems having several closing points, especially for armored doors.

In doors, and especially in armored doors, lock systems are often installed which, by means of transmission rods, carry out a lock closing not only in the immediate vicinity of the lock itself, but also at distant points of the lock, on the periphery of the door, so as to provide greater security against the forcing of the door. In these systems deviators must be used whenever the locks extend in a direction orthogonal to the direction of movement of the rods which drive them. These deflecting devices comprise a movable plate, connected to the corresponding control rod, provided with an inclined rectilinear slot in which engages a dowel secured to a lock movable in a direction orthogonal to the direction of movement of the movable plate. Due to the inclination of the slot of the movable plate, the displacement of the latter in a direction under the action of the control rod gives rise, as is necessary, to a displacement of the latch in an orthogonal direction by compared to the previous one. The locks of the locks, as well as the locks driven by these deflecting devices, in the known forms have a uniform active section, most often circular, and therefore they oppose the opening of the door as long as they are engaged in the sleeping frame of the door, but they cannot oppose a forcing or unhinging action carried out so as to distance the door and its sleeping frame from each other; in fact, in the presence of such an action, the bolt disengages from the sleeping frame and its action ceases.

One of the aims of the present invention is to improve the known deflection devices for the indicated application, so that the lock controlled by means of a deflector, when it is in the engagement position, is also capable to oppose any action tending to distance the sleeping frame and the door from each other, while remaining positively engaged in the sleeping frame, in such a case, instead of disengaging from it. This adds a considerable degree of security to the system.

This object is achieved, according to the present invention, in a deflector device for controlling a lock by means of a control rod orthogonal to the lock, this deflector comprising a box intended to be fixed to a door and comprising a slot s' extending in a predetermined direction, a plate which can be moved in said box in a direction orthogonal to said direction of the box slot and which is intended to be connected to a corresponding control rod, said plate comprising a slot inclined by relative to said direction of the slot of the box as well as relative to its own direction of movement, and a lock which can be moved in said box in the direction of said slot of the box, this lock having an end intended to protrude relative to said box for engaging the door frame, and being provided with a pin engaged either in said slot of the box, that is to say in the said inclined slot of the movable plate, by the fact: that said lock comprises a first part and a second part, coupled together so as to be able to rotate but not to be able to move l 'one relative to the other in the axial direction; that said end of the lock which is intended to engage the door frame is integral with said first part of the lock and it has an enlarged non-circular section; that said pin engaged in the respective slots of the box and the movable plate is mounted on said second part of the lock; that said first part of the lock has a groove having a substantially helical portion extending around the latch at an angle close to 90 °; and that said box has a fixed pin engaged in said groove of the first part of the lock.

Because of these characteristics, when the displacement of the control rod to which the movable plate is connected gives rise to the displacement of the plate itself, the engagement of the pin of the second part of the lock in the respective slots of the box and the movable plate gives rise to an axial displacement of said second part of the lock, and therefore also of the first part of the lock, which is coupled with said second part so as to be able to rotate but not to be able to move axially by report to the second part; the axial displacement of the first part of the latch, due to the engagement of said dowel of the box in the groove of the first part of the latch, which comprises a helical part, gives rise to a rotation of about 90 ° of said first part of the bolt, and therefore of the enlarged non-circular end which engages the door frame. Consequently, the enlarged end of the lock, after passing through a corresponding opening in the door frame, also performs a rotary movement beyond this opening. Or the fact that said end has a non-circular shape, by providing in the door frame of the door an opening of non-circular shape complementary to the shape of said enlarged end of the lock, there is produced between the lock and the door frame positive coupling, which cannot be released by a simple distance between the fixed frame and the door, but only by the displacement of the lock relative to its box, comprising a rotation of the first part of the lock. An additional retaining action is thus produced, which is capable of opposing forcing or unfolding actions of a type to which the known locks, which are simply inserted into a corresponding opening in the frame, cannot be oppose.

Preferably said groove of the first part of the latch comprises a rectilinear end part and a part of helical shape. In a particular embodiment, said groove comprises two rectilinear end parts and a central part of helical shape. In this way, the parts of the travel of displacement of the bolt which correspond to the engagement of the fixed pin in rectilinear parts of the groove take place by simple translation, while, when said fixed pin corresponds to the helical part of the groove, the movement of movement of the bolt comprises a rotation of the bolt, which gives rise to its positive coupling with the standing frame of the door.

Preferably said first part of the lock forms the body of the lock, and said second part forms a sheath which is coupled with said body of the lock so as to be able to rotate but not to be able to move axially.

Preferably the rotating but not axially movable coupling between said sleeve and the body of the lock is produced by inserting the sleeve on a portion of reduced diameter of the body of the lock and fixing it in position, without axial tightening, with interposition of a washer, by means of a nut screwed onto the end of said portion of reduced diameter of the body of the lock.

• Fig. 1 montre en perspective un dispositif déviateur suivant l'invention, en position de repos, à savoir, avec le verrou retiré;
• Fig. 2 en est une vue similaire, mais en position active, à savoir, avec le verrou sortant;
• Fig. 3 montre une section longitudinale du dispositif déviateur, faite suivant la direction axiale du verrou, perpendiculairement à la plaque déplaçable;
• Fig. 4 est une vue du corps du verrou du dispositif dèviateur suivant la figure 3, isolé;
• Fig. 5 est une vue du corps du verrou suivant la figure 4, tourné de 90°; et
• Fig. 6 montre l'ouverture non circulaire complémentaire de la partie élargie du verrou, pratiquée dans le bâti dormant de la porte.

These characteristics and others, the advantages and other objects of the invention will emerge more clearly from the following description of an embodiment, having the character of a nonlimiting example, represented schematically in the accompanying drawings, wherein:

• Fig. 1 shows in perspective a diverter device according to the invention, in the rest position, namely, with the latch removed;
• Fig. 2 is a similar view, but in the active position, namely, with the protruding lock;
• Fig. 3 shows a longitudinal section of the deflector device, made in the axial direction of the latch, perpendicular to the movable plate;
• Fig. 4 is a view of the body of the lock of the diverting device according to FIG. 3, isolated;
• Fig. 5 is a view of the body of the lock according to FIG. 4, turned through 90 °; and
• Fig. 6 shows the complementary non-circular opening of the enlarged part of the lock, made in the door frame.

Referring to Figures 1 to 3, a diverter device according to the invention comprises a support box formed by a front wall 1, by side walls 2, from which flanges 3 extend for the application of the box to a door P (indicated in part by dashed lines in Figure 3) and end walls 4. The front wall 1 of the box has a slot 5 parallel to the longitudinal direction of the box, that is to say parallel of the intersections between the front wall 1 and the side walls 2. The end walls 4 of the box have openings to allow passage and to guide a lock inserted in the box with limited mobility.

The lock is formed above all by a body 7 of circular section, having an enlarged end 8, of non-circular section, and having a portion 9, opposite to said enlarged end, of reduced diameter and ending in a flange 10 and by a threaded part 11. Either the non-circular enlarged end 8 or the threaded part 11 protrude, in any position of the lock, relative to the end walls 4 of the support box. On the portion 9 of reduced diameter of the lock is mounted a sheath 14 retained by a washer 12 pressed against the flange 10, and by a nut 13 screwed onto the thread 11. This coupling is carried out so that the rotation between the body 7 of the latch and the sleeve 14 is substantially free, while an axial displacement between these two parts is prevented unless a small coupling play is necessary.

The sleeve 14 carries a dowel 15 which engages the slot 5 of the support box, so that it prevents rotation of the sleeve 14 relative to the box, while it allows axial movement thereof in the longitudinal direction of the box. within the limits permitted by the length of the slot 5. This same axial movement is therefore also allowed to the body 7 of the lock, which, on the other hand, can also rotate, due to its rotary coupling relative to the sheath.

The body 7 of the lock shows a groove which, in the embodiment shown, comprises a first longitudinal portion 16, a second portion 17 which extends helically around the body 7 at an angle close to 90 °, and a third portion 18 longitudinal. In this groove 16-18 is engaged the fixed pin 6 secured to the support box. In the support box 1-4 is also mounted a plate 19, movable in an orthogonal direction relative to the longitudinal direction of the box and its slot 5. The plate 19 has holes 20 or other means for its connection to a control rod T (indicated in part by dashed lines in Figure 1), and it is provided with a slot 21 in which is engaged the pin 15 of the latch 7-14, which is also engaged in the slot 5 of the support box.

The operation of the diverter device described is as follows. At rest, the device, applied to a door P provided with its dormant frame B (indicated in part by dashed lines in Figure 3), is in the position shown in Figures 1 and 3. In this position , the enlarged end 8 of the latch is substantially adjacent to an end wall 4 of the support box, and it does not engage in the standing frame B of the door P, which therefore can be opened and closed freely . If, from this condition, the door lock is actuated, which causes the displacement of a control rod T connected at 20 to the plate 19, this plate 19 is moved in the direction of the arrow X. As a result of the inclination of the slot 21 of the plate 19, the pin 15, which is engaged either in the inclined slot 21 of the plate 19, or in the longitudinal slot 5 of the box 1-4, is forced to move along arrow Y, in a direction orthogonal to the direction of arrow X, along which plate 19 moves. With pin 15 move in the direction of arrow Y the sleeve 14 and the body 7 of the lock. As a consequence of this movement, the lock enters a corresponding opening O of the fixed frame B of the door P, by blocking the latter. However, due to the fact that the pin 6 secured to the box 1-4 is engaged in the groove 16-18 of the body of the lock, during its movement the body 7 of the lock is also forced to perform a rotation of 90 °, when the helical portion 17 of the groove 16-18 is engaged by the fixed pin 6. Consequently, also the enlarged non-circular end 8 of the lock performs a rotation of 90 °. The device thus reaches the position shown in FIG. 2. Consequently, if the opening O through which the lock enters the dormant frame B of the door P has a shape complementary to that of the enlarged non-circular end 8 of the lock (as shown in Figure 6), after the rotation of the lock it is no more posible to disengage the lock from the door frame, without first turning the lock in the opposite direction. If a forcing or unhinging action is exerted in the direction of mutually separating the sleeping frame B and the door P, it cannot be verified - as in known systems - a disengagement of the latches of the sleeping frame from the door; on the contrary, the engagement of the latches with the standing frame cannot be released by this action. This provides security against forcing or undermining actions which cannot be prevented by known locks.

Of course, when the lock is actuated in the direction opposite to that which had previously caused the closure, the pin 15 is pulled in the direction opposite to the arrow Y, and during its movement the body 7 of the lock is forced to rotate by action of the fixed pin 6 engaged in the groove 16-18, and the non-circular enlarged end 8 can disengage from the opening O of the fixed frame B of the door P, by authorizing its opening again.

It should be understood that the embodiment shown may receive modifications with the aim of making it suitable for the different application requirements. The shape and dimensions of the box 1-4, the latch 7-18, the plate 19 and the enlarged end 8 can be changed considerably without modifying the operation of the deflector device. The rotary coupling between the part 7 of the bolt which carries the enlarged non-circular end 8 and the part 14 which carries the pin 15 engaged in the slots 5 of the box 1-4 and 21 of the control plate 19 can be produced in forms different from that shown. The groove 16-17 formed in the body 7 of the latch to co-operate with a pin 6 fixed to the support box could be devoid of the final longitudinal portion 18. In addition, the inclined slot 21 of the control plate 19 could present at least one of its ends with a hollow intended to make the displacement of the deflection device irreversible, according to the teaching of Italian patent No. 1,211,610.

Claims (5)

Diverter device for controlling a lock (7-14) by means of a control rod (T) orthogonal to the lock, this diverter comprising a box (1-4), intended to be fixed to a door (P) provided of a fixed frame (B), and comprising a slot (5) extending in a predetermined direction (Y), a plate (19) which can be moved in said box (1-4) in a direction (X) orthogonal by relative to said direction (Y) of the slot of the box and which is intended to be connected to a corresponding control rod (T), said plate (19) comprising a slot (21) inclined relative to said direction (Y) of the slot (5) of the box as well as with respect to its own direction of movement (X), and a latch (7-14) which can be moved in said box in the direction (Y) of said slot (5) of the box, this lock comprising an end (8) intended to project relative to said box to engage the standing frame (B ) of the door, and being provided with a pin (15) engaged either in said slot (5) of the box, or in said inclined slot (21) of the movable plate, characterized in that said lock comprises a first part (7-9) and a second part (14), said first and second parts being coupled together so as to be able to rotate but not to be able to move relative to each other in the axial direction ( Y); that said end (8) of the lock which is intended to engage the fixed frame (B) of the door is integral with said first part (7) of the lock and it has an enlarged non-circular section; that said pin (15) engaged in the respective slots (5) of the box and (21) of the movable plate is mounted on said second part (14) of the lock; that said first part (7) of the lock has a groove (16-18) having a part (17) substantially helical extending around the lock at an angle close to 90 °; and that said box (1-4) has a fixed pin (6) engaged in said groove (16-18) of the first part (7) of the lock. Diverting device according to claim 1, characterized in that said groove in the first part of the latch comprises an end part (16) rectilinear and a part (17) of helical shape. Diverter device according to claim 2, characterized in that said groove comprises two end portions (16,18) rectilinear and a central portion (17) of helical shape. Diverter device according to claim 1, characterized in that said first part (7) of the lock forms the body of the lock, and said second part (14) forms a sleeve which is coupled with said body (7) of the lock so as to be able turn but not be able to move axially. Diverter device according to claim 4, characterized in that said rotating but not axially displaceable coupling between said sheath (14) and the body (7) of the latch is produced by inserting the sheath (14) on a portion (9) of reduced diameter of the body (7) of the lock and fixing it in position, without axial tightening, with the interposition of a washer (12) pressing against a flange (10), by means of a nut (13) screwed on the end threaded (11) of said portion (9) of reduced diameter of the body (7) of the lock.

Images