JP2007170071A - Lock for double doors - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lock for double doors, in which an engaging shoe, rotatably mounted at the leading end of a dead rod, is backed up by a leading end of a backup rod, and which makes the engaging shoe free by slightly shifting the backup rod in the opening of the master door. <P>SOLUTION: The slave door is placed in a closed position, and the master door is closed, so that the dead rod 6 can be charged into the strike hole of a floor surface and/or a head via a follower 3 and a swing lever 18 by the movement of its strike. In this case, a reversing latch 32 is pushed into a latch case 38 by engaging the strike hole of a strike plate, which is mounted at the free side edge of the master door, with the reversing latch 32; an operating lever 37 is counterclockwise turned by the above motion; and the backup rod 17 is pushed up by an operating pin 41 at its leading end. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an automatic locking device (hereinafter simply referred to as a double door lock) for a double door called a double door, and more particularly to a strike hole and a dead bolt formed on a floor surface or a ceiling surface. It is related with the double door lock which can open | release smoothly even if it is a case where a side pressure acts between.

  The present applicant has previously proposed a novel automatic door locking device (double door lock) with a double door as described below.

  This double door lock is made by placing the child door 1 shown in FIG. 1 of Patent Document 1 on the door stop in a closed position, and then by using a human hand or closer to the child door locked on the door stop. Close the main door.

  Then, the follower is pushed into the lock box by engagement between the free side edge of the main door and the follower 7 protruding from the front plate of the child door (reference numeral 7 in FIG. 2 of Patent Document 1). Using the movement of the child 7, dead bolts (operating rods in Patent Document 1) are introduced from the upper and lower edges of the child door into strike holes opened in the upper frame or floor surface, and both the parent and child doors are closed.

When opening both doors, unlocking the main door and opening it will cause the follower to protrude from the front plate with the force of the spring, so the dead bolt will automatically be pulled into the lock box and linked to the main door. The child door also opens.
JP-A-4-38385

  The so-called double doors with the above-described configuration are installed in emergency exits of, for example, theaters and office buildings. However, when a person rushes into an emergency exit due to, for example, a fire or an earthquake, a person usually presses the child door The tip of the dead bolt of both door locks is strongly pressed against the opening edge of the strike hole, and due to the frictional resistance generated at this contact portion, the child door does not open even if the main door opens, and the emergency exit remains narrow Inconvenience occurs.

  An object of the present invention is to provide a novel double door lock that eliminates the twisting of dead bolts and strike holes in the initial stage of opening of the main door, thereby eliminating the above-mentioned disadvantages.

  In order to achieve the above object, the invention described in claim 1 includes a case body attached to an end of a free side edge of a child door of both doors, a free side edge of the child door, A follower that is supported by the front plate of the case body, which is almost flush with the front panel, and interferes with the free side edge when the main door is closed, and is pushed into the case body, and the free side end of the child door in the case body A dead rod that extends in a direction parallel to the edge and is movably guided in the length direction thereof and is biased in a direction of being pulled into the case body, and an inner end of the dead rod and the follower An actuating force deflection mechanism that is arranged to transmit the movement of the follower when the main door is closed to the dead rod and to drive it out of the case body along the length direction, and the outside of the dead rod At the end, it is pivotally supported around a horizontal spindle that is parallel to the door surface, and the tip closes the child door. An engagement shoe that is constrained to rotate only in the direction and biased in the same direction, and a restraining position in which the outer end contacts the engagement shoe from the closing direction of the child door in a manner overlapping with the dead rod, A backup rod which is guided to be movable relative to the dead rod between the release position where it is drawn into the case body and is no longer engaged with the engagement shoe, and is urged in a direction to protrude out of the case body. A locking mechanism that locks the backup cage in the restrained position relative to the dead cage, and a strike that is urged in the direction protruding from the front plate and formed on the free side edge of the main door when both doors are closed A reversing latch that is inserted into the hole, and a release mechanism that releases the restraint by the locking mechanism and moves the backup bag to the release position in the initial stage of opening the main doors of both closed doors. Features.

  In the double door lock according to the invention described in claim 1 configured as described above, in the closed state of the double door, the lateral pressure for pushing the child door in the opening direction is attached to the outer end of the dead bag. It is carried on the case body via the engagement shoe and the backup rod.

  When the main door was opened with the side pressure applied, the reverse latch of the case body released the restraint of the backup bag by the locking mechanism at the initial stage, so the backup bag was pulled into the case body and was restrained at its tip The engagement shoe becomes free.

  Therefore, the engagement shoe rotates in the closing direction and the dead rod becomes easy to move, and the dead rod is pulled out from the floor surface or the strike hole of the upper frame by the urging force of the dead rod, thus making the child door easy It has the expected effect of opening up.

  An engagement shoe is rotatably provided from the edge of the free edge of the door to the end of the dead rod inserted into the floor surface or the strike hole of the upper frame, and the restraint by the backup rod is used to open the main door. The problem was solved by the side pressure applied to the tip of the dead rod of the child door because it was solved at the expected time.

An embodiment of the present invention will be described below with reference to the drawings.
1 and 2, reference numeral 1 denotes a case body, and this case body 1 is mounted, for example, in an embedded manner on the upper end and / or the lower end of the free side end performance of the child door (see FIG. 1 of Patent Document 1). reference).

  As shown in FIGS. 1 and 3, a follower 3 is provided in the vicinity of the front plate 2 that is substantially flush with the free side edge of the child door of the case body 1.

  As shown in FIG. 3, the follower 3 in the illustrated embodiment is a block body having a fan-shaped projection on the floor surface (horizontal plane), and in the horizontal plane by the first support shaft 4 that vertically penetrates the main part. It is pivotally supported so that it can rotate.

  The follower 3 has a striking plate 5 attached to the free side edge of the main door (not shown) when the main door is closed with respect to the case body 1 in the closed position shown in FIG. 3, in other words, when the strike plate 5 is lowered in FIG. 3, it is driven by the strike plate and rotates counterclockwise in FIG. 3 to drive an operating force deflection mechanism described later.

  The follower 3 is not a rotating block body as in the illustrated embodiment, but has a slope at the tip as described in Patent Document 1 and can move in a direction perpendicular to the strike plate. Of course, it may be the one guided by.

  On the other hand, in FIG. 1 and FIG. 2, reference numeral 6 denotes a dead rod, and the dead rod 6 in the illustrated embodiment is an elongated plate-like body whose lower portion is bent into a U-shaped cross section to increase the rigidity. It extends in a direction (vertical direction) parallel to the free side edge of the door.

  The dead rod 6 is supported and guided by the second and third support shafts 7 and 8 so as to be movable in the vertical direction.

  Further, as shown in FIG. 1, a guide rod 9 planted on the inner bottom surface of the case body 1 is opened to a horizontal guide plate 11 integrally formed on the side edge of the dead rod, and is not shown. Due to the elasticity of the first urging spring 12 as a compression coil spring wound around the guide rod 9 between the guide plate 11 and the bottom surface of the case body 1, the dead rod 6 is urged upward, in other words, in a direction to be pulled into the case body.

  On the other hand, as shown in FIG. 1, a swing lever 13 as an operating force deflection mechanism is disposed between the upper end portion of the dead rod 6 and the follower 3.

  The swing lever 13 is a member formed by bending a plate material into a U-shaped cross section and forming the projection shape onto the side plate of the case body 1 into a fan shape, and is a horizontal fourth support shaft penetrating through the essential part. 14 is pivotally supported so as to be swingable.

  Further, one end of the swing lever close to the follower 3 is in contact with the follower 3 via the roller 15, and the horizontal first engagement pin 16 carried on the other end is shown in FIGS. As shown in FIG. 3, it is slidably engaged with an engagement hole which is an unnumbered horizontal long hole opened at the upper end of the dead rod 6.

  With the above-described configuration, when the main door comes close to the closed position, the follower 3 is pushed into the case body 1 by the strike plate 5, and the swing lever 13 is interlocked with the rotation of the follower in FIG. As shown in FIG. 4, the dead rod 6 descends against the elastic force of the first urging spring 12.

  At this time, when the engagement shoe 19 (described later) is inserted into a strike hole (not shown) opened on the floor surface or the upper frame and a side pressure is applied to the child door, the right side surface of the engagement shoe 19 in FIG. Pressed against the opening edge.

  As described above, the lower end portion of the dead rod 6 is formed in a U-shaped cross section as described above, but the lower end portion of the backup rod 17 (see FIGS. 1 and 2) described below is also U-shaped in cross section. It is bent to.

  Then, as shown in FIG. 2, the U-shaped openings at the lower ends of the dead cage 6 and the backup cage 17 are opposed to each other, and the small U-shape of the backup cage 17 is formed on the large U-shaped portion of the dead cage 6. Both U-shaped portions are polymerized in a manner of entering.

  On the other hand, as shown in FIG. 2, the engagement shoe 19 is rotatably disposed on the outer end overlapped with the backup rod as described above by a horizontal support shaft 18 parallel to the door surface. Yes.

  Further, the engagement shoe 19 is biased counterclockwise by the elastic force of the torsion coil spring whose number is omitted for the sake of clarity, but in a normal state where no external force acts on the engagement shoe 19, Its upper end elastically contacts the inner bottom surface of the U-shaped portion of the backup rod 17 to maintain the illustrated angular position.

  Therefore, the engagement shoe 19 is constrained so that it cannot further rotate counterclockwise (the tip of the engagement shoe is in the right direction) from the angular position shown in FIG.

  The side pressure received by the engagement shoe 19 acts so as to push the tip of the backup rod 17 to the left in FIG. 2 via the roller 22, but on the left side of the tip of the backup rod 17 is a needle roller 30. Is provided to facilitate the subsequent rise of the backup rod 17.

  On the other hand, as shown in FIGS. 1 and 2, the backup rod 17 extends in the vertical direction in such a manner that it overlaps with the dead rod 6, and the second and third support shafts 7, 8 are the same as the dead rod 6. Is guided so as to be movable in the length direction.

  Further, although not shown in FIG. 1 for clarity of illustration, the backup rod 17 is provided with a compression coil spring 23 as shown in FIG. 13, and the backup rod 17 is provided by the elasticity of the compression coil spring. Is urged in a direction projecting out of the case body 1, and in the normal state shown in FIGS.

  Furthermore, a roller 22 is pivotally supported at the lower end of the backup rod 17 by a horizontal fifth support shaft 21, and this roller 22 is left to the engagement shoe 19 at the illustrated restraint position. From the direction of the door (the closing direction of the child door).

  As described above, the relative restraining position of the roller 22 (backup rod 17) with respect to the dead rod 6 is determined by the locking mechanism 24 described below.

  As shown in FIGS. 1 and 5, the locking mechanism 24 is a link formed by first and second levers 25 and 26.

  One ends of these first and second levers are link-coupled by connecting pins 27 so as to be able to bend and extend, and the other ends of the first levers 25 are rotatably supported by the dead rod 6.

  Also, as shown in FIG. 1, one end of the second engagement pin 28 planted so as to penetrate the other end of the second lever is slid into a longitudinal guide groove 29 opened at the upper end of the dead rod 6. While being movably engaged, the other end is rotatably fitted in an unnumbered fitting hole opened at the upper end (inner end) of the backup rod.

  The second lever 26 is wound counterclockwise by the elasticity of the torsion coil spring 31 wound around the other end of the second lever 26 and having a larger elasticity than the compression coil spring 23. The second engagement pin 28 of the lever 25 is seated on the lower end of the guide groove 29 by the elasticity of the torsion coil spring 31, and the relative position of the backup rod 17 to the dead rod 6 is determined as shown in FIG. Yes.

  This backup rod 17 is kept in the restraining position, and this restraining position is kept even when the child door shown in FIG. 4 is closed.

  In order to release the restraint of the backup rod 17 by the locking mechanism 24, a release mechanism by an inversion latch 32 shown in FIG. 5 is provided.

  As shown in FIG. 5, the inversion latch 32 is a reversal supported so as to be rotatable around a vertical axis by a sixth support shaft 33 whose horizontal projection forms a part of a parallelogram and passes through the intersection of the diagonal lines. The latch 32 is biased in a direction protruding from the front plate 2 of the case body 1 via the latch board 35 by the elasticity of the latch spring 34 as a compression coil spring.

  As described above, the reverse latch 32 is carried on the latch board 35, and as shown in FIG. 5, the locking mechanism 24 is provided in a space adjacent to the space in which the latch spring 34 is accommodated. It is stored.

  Then, due to the action as the reverse latch, at the beginning of the closing of the main door, the reverse latch rotates and falls as shown in FIG. 5, and when the main door closes further, the reverse latch as shown in FIG. The reversing latch is pushed into the case body 1 by a wedge action that occurs between the engaging surface of the contact hole and the opening edge of the strike hole.

  When the main door is completely closed, as shown in FIG. 7, the reversing latch 32 is turned into the strike hole while turning, and the inclined surface up to that time becomes the locking surface.

  Incidentally, the strike plate 5 shown in FIGS. 8 and 9 is attached to the free side edge of the main door (not shown), and the strike hole 40 is provided at the portion facing the reversing latch 32 when both doors are closed. 3 are provided with follower strike projections 37, respectively.

  The strike protrusion 37 can adjust the amount of protrusion from the strike plate 5, but the configuration thereof is not the gist of the present invention, so a more detailed description is omitted.

  Returning to the explanation of the release mechanism, when the main door is opened with the side pressure applied to the sub door, the strike plate 5 of the main door moves upward relative to the case body 1 as shown in FIG. .

  At this time, the dead bag 6 and the backup bag 17 are lowered as shown in FIG.

  Then, the reverse latch is pushed into the case body 1 by a wedge action generated between the inclined surface of the reverse latch 32 and the opening edge of the strike hole, and the driving roller 36 attached to the inner end thereof is moved to the locking mechanism 24. Push the connecting part of the link inward in the horizontal direction.

  Therefore, the rectangular link of the locking mechanism 24 extends, and the second engagement pin 28 provided at the upper end pulls up the backup rod 17 with respect to the lower end around which the torsion coil spring 31 is wound. At this point, the backup bag 17 rises.

  Therefore, as shown in FIG. 12, the roller 22 integrated with the backup rod 17 moves upward, and the engagement shoe 19 constrained thereto can tilt in the child door closing direction as shown by the chain line.

  Therefore, the side pressure of the child door is released by the tilting of the engagement shoe 19, and the dead rod 6 and the backup rod 17 are integrally drawn into the case body, and the locking of the child door to the floor surface or the upper frame is released. It is burned.

  13 and 14 show another embodiment of the invention described in claim 1, and the difference between the child embodiment and the first embodiment is only the locking mechanism.

  That is, in FIG. 13 and FIG. 14, reference numeral 37 denotes an operating lever, and this operating lever 37 is a lever body whose projection shape with respect to the side plate of the latch case 38 is a substantially square shape, A six-support shaft 39 is rotatably supported.

  And the angular position shown in FIG. 13 is normally maintained by the stopper which is not illustrated.

  Further, the operating pin 41 implanted at one end of the operating lever 37 is engaged with a bent portion formed at the upper end of the backup rod 17 from below.

  Therefore, the backup rod 17 urged downward (outward) by the elastic force of the compression coil spring 23 is kept in a restrained position where the outer end abuts the engagement shoe from the closing direction.

  On the other hand, for the sake of clarity, a reversing latch 32 is shown in the vicinity of the actuating lever 37, omitting the latch spring 34 and the latch board 35. The strike hole 40 is engaged.

  In the double door lock configured as described above, when the main door is opened a little, the lower slope of the inversion latch 32 comes into contact with the opening edge of the strike hole (see FIG. 10), and when the main door is further opened. The inversion latch 32 moves inward, and the operation end 42 of the inversion latch pushes the other end of the operation lever 37.

  Then, the actuating lever rotates counterclockwise in FIG. 13 and the actuating pin 41 at the tip thereof lifts it against the urging force of the backup rod 17.

  Then, as described above, the backup rod 17 rises relative to the dead rod 6, and the engagement between the roller 22 and the engagement shoe 19 is as described above.

The partial cross section side view of the double door lock by one Example of this invention. FIG. The plan view. FIG. 2 is a partial cross-sectional side view similar to FIG. 1, showing both doors closed. The top view of the inversion latch part which shows the initial stage of closing operation | movement of a main door. FIG. 6 is a plan view of an inversion latch unit similar to FIG. 5, showing a state in which the inversion latch is pushed in a little. It is a top view of the inversion latch part similar to FIG. 5, and shows the time of closing both doors. The front view of a strike board. The partial cross section side view of a strike board. It is a side view of the reverse latch part similar to FIG. 5, The opening start of a main door is shown. FIG. 6 is a side view of the reverse latch portion similar to FIG. 5, showing a state in which the reverse latch releases the locking mechanism. The front view of the double door lock for demonstrating the action | operation of an engagement shoe. The partial cross section side view of the double door lock by the other Example of this invention. The top view of the inversion latch part.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Case body 2 Front plate 3 Follower 5 Strike plate 6 Dead rod 13 Swing lever 17 Backup rod 18 Support shaft 19 Engagement shoe 22 Roller 24 Locking mechanism 32 Reverse latch 34 Latch spring 35 Latch board 37 Actuation lever 38 Latch case 40 Strike hole 42 Working end

Claims (1)

  The case body that is mounted on the end of the free side edge of the child door of both doors and the front plate of the case body that is almost flush with the free side edge of the child door A follower that interferes with the free side edge when the door is closed and is pushed into the case body, and extends in a direction parallel to the free side edge of the child door within the case body and can move in its length direction. Guided and placed between the dead rod urged in the direction of being pulled into the case body and the inner end of the dead rod and the follower, the movement of the follower when the main door is closed is transmitted to the dead rod. And an actuating force deflection mechanism that drives it to be pushed out of the case body along the length direction, and can be rotated around a horizontal support shaft parallel to the door surface at the outer end of the dead rod. It was pivotally supported and its tip was constrained to rotate only in the closing direction of the child door and urged in the same direction Between the joint shoe and the restraint position where the outer end contacts the engagement shoe from the closing direction of the child door in a form overlapping with the dead bag, and the release position where it is drawn into the case body and is not engaged with the engagement shoe. A backup rod that is guided so as to be relatively movable with respect to the dead rod and is urged in a direction protruding from the case body, and a locking mechanism that locks the backup rod relative to the dead rod at a restraining position. And a reversing latch that is urged in a direction protruding from the front plate and is inserted into a strike hole formed in the free side edge of the main door when both doors are closed, and the main door of both doors that are closed A double door lock characterized by having a release mechanism for releasing the restraint by the locking mechanism and moving the backup rod to the release position in the initial stage of opening.

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