JP4851845B2 - Double door lock - Google Patents

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.

  However, even though this double door lock is referred to as a “lock”, its substance is a child door latch device.

  The present applicant has previously proposed a novel automatic door locking device (double door lock: latch device) of a double door with the following Patent Document 1.

This double door lock consists of a case body attached to the end of the free side edge of the child door of the double door and a front plate of the case body that is substantially flush with the free side edge of the child door. A follower that is supported so as to be able to move in and interferes with the free side edge when the main 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 in the case body. A dead rod guided so as to be movable in the length direction and biased in a direction to be pulled into the case body, and a follower disposed between the inner end of the dead rod and the follower, and when the main door is closed Actuation force deflection mechanism that transmits the movement of the dead rod to the dead rod and pushes it outward from the case body along the length direction, and a horizontal support shaft parallel to the door surface at the outer end of the dead rod The tip is constrained to be rotatable only in the closing direction of the child door and The engagement shoe biased in the direction of the door and the restraint position where the outer end comes into contact with the engagement shoe from the closing direction of the child door, and the engagement shoe is pulled into the case body and engaged with the engagement shoe. A backup cage that is guided so as to be movable relative to the dead cage and between the release position where it disappears, and is urged in a direction to protrude out of the case body, and the backup cage is positioned relative to the dead cage. Closed, 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. In an initial stage of opening the main doors of the both open doors, there is provided a release mechanism that releases the restraint by the locking mechanism and moves the backup rod to the release position.
Japanese Patent Application No. 2005-370131

  The so-called double doors described above are installed at emergency exits of theaters and office buildings, for example, and when people rush to the emergency exits to escape to the outdoors due to fires, earthquakes, etc. The tip of the dead bolt of the lock is strongly pressed against the opening edge of the strike hole, and due to the frictional resistance generated at this contact portion, even if the main door opens, the child door does not open and the emergency exit remains narrow. It has a purpose to eliminate.

  In the invention described in Patent Document 1, in the initial stage of opening the main door, the back-up hook is pulled into the case body using the reverse latch, and the engagement shoe is freely used using the movement. Therefore, the child door is smoothly opened by eliminating the dead bolt and the strike hole, but there is still room for improvement such as the movement of the backup rod is not always smooth.

  Then, this invention aims at providing the double door lock which can cancel | release a latch apparatus only by pushing a child door to an open direction.

  In order to achieve the above object, a latch device for locking the child doors of both doors to the floor and / or the ceiling, which is attached to the lower end and / or the upper end of the free side edge of the child door. The main body and the projected shape on the horizontal plane are substantially fan-shaped, and the main part of the case body can be rotated around the front plate of the case body which is substantially flush with the free side edge of the child door, and from the front plate. A main latch that is supported so that it can appear and retract and interferes with a strike attached to the free side edge of the main door when the main door is closed, and is connected to the main latch above or below the main latch. A sub-latch, a dead rod that extends in a direction parallel to the free side edge of the child door in the case body, is guided so as to be movable in its length direction, and is biased in a direction to be drawn into the case body, The inner end of this dead bag and the above A first operating force deflection mechanism that is disposed between the in-latches and transmits the movement of the main latch when the main door is closed to the dead rod and drives it to be pushed out of the case body along the length direction. And at the outer end of the dead rod, it is pivotally supported around a horizontal spindle that is parallel to the door surface, and its tip is constrained to be pivotable only in the closing direction of the child door and is biased in the opposite direction. And an inclined end formed integrally with the inner end of the engagement shoe, and at least an outer end extending in a direction parallel to the free side end of the child door in the case body. And an actuating rod having an engaging pin which is guided so as to be movable in the longitudinal direction in a manner that overlaps with the dead rod and is urged to elastically contact the inclined end edge of the engaging shoe on the outer end. It is arranged between the inner end of the bag and the sub-latch, and the sub-latch when the main door is closed A second actuating force deflection mechanism that drives the actuator to move outwardly from the case body along the length direction. When the main door is closed, the main and sub latches are simultaneously When activated, the dead rod and operating rod are integrally pushed out, and the engagement shoe of the dead rod is inserted into the strike hole provided on the floor and / or ceiling, while the child door is pushed in the opening direction. The dead hook is temporarily locked to the strike hole by the frictional engagement generated between the engagement shoe and the opening edge of the strike hole, and the wedge between the engagement pin and the engagement pin generated by the rotation of the engagement shoe. By the action, the operating rod is pushed into the case body, whereby the engagement pin and the engagement shoe are engaged to release the engagement shoe.

  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 by the strike of the main door via the engagement between the inclined end edge integral with the engagement shoe and the engagement pin, the operating rod, the second operating force deflection mechanism and the sub latch.

  When the child door is pushed in the opening direction with a side pressure applied to the engagement shoe, dead wrinkles are temporarily engaged with the strike hole due to frictional engagement between the engagement shoe and the opening edge of the strike hole. Since the operating rod is pushed into the case body by the wedge action generated between the inclined edge integrated with the engaging shoe and the engaging pin by further pushing of the child door, the engaging shoe and the operating rod Is disengaged, the engagement shoe is released and the child door is released.

  For this reason, the engagement shoe rotates to eliminate frictional engagement with the strike hole, and the dead rod is pulled out of the strike hole of the floor surface or the upper frame by the urging force of the dead rod, and thus the child door can be easily made. There is an expected effect of opening.

  An engagement shoe is pivotally provided from the end of the free side edge of the door to the floor of the floor or the tip of the dead rod inserted into the strike hole of the upper frame, and the engagement shoe is restrained to open the child door. Since the problem was solved at the initial stage, the inconvenience due to the lateral pressure applied to the tip of the dead cage of the child door could be solved.

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 the case body 1 is attached to the upper end and / or the lower end of the free side edge portion of the child door, for example, in an embedded manner.

  The case body 1 shown in FIGS. 1 and 2 is attached to the lower end portion of the child door, and a dead rod described later is inserted into a strike hole provided on the floor surface to lock the child door to the floor surface. To do.

  Incidentally, another case body (not shown) is usually mounted on the upper end of the child door symmetrically with the case body 1, while a strike hole is formed at the free side edge of the child door between the pair of case bodies. And a dead bolt of a lock box (not shown) mounted on the main door side is inserted into the strike hole to lock both doors.

  As shown in FIGS. 1 and 3, a main latch 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 main latch 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 a first support shaft 4 that vertically penetrates the main part. It is pivotally supported so that it can rotate.

  As shown in FIG. 3, the main latch 3 has a strike plate 5 (not shown) attached to a 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 against the door. 5) is relatively close to the child door in FIG. 3, in other words, when the strike plate 5 is lowered in FIG. 3, the strike plate is driven to rotate counterclockwise in FIG. An operating force deflection mechanism described later is driven.

  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 child 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.

  As shown in FIGS. 1 and 2, the second support shaft 7 is a short cylindrical body that is caulked to the upper end portion of the dead rod 6, and a small-diameter portion formed at the right end in FIG. It is slidably engaged with a vertically long first guide hole 9 (see FIG. 1) formed on the side surface.

  The third support shaft 8 is slidably engaged with a vertically long second guide hole 11 (see FIG. 1) formed in an operating rod described later, and also serves as a guide portion for the operating rod. .

  Furthermore, as shown in FIG. 1, the guide rod 12 planted on the inner bottom surface of the case body 1 is opened to a horizontal guide plate 13 integrally formed on the side edge of the dead rod 6 (not shown). Due to the elastic force of the first urging spring 14 as a compression coil spring wound around the guide rod 12 between the guide plate 13 and the bottom surface of the case body 1, it is slidably fitted to the guide hole. The heel 6 is biased upward, in other words, in a direction to be drawn into the case body.

  On the other hand, as shown in FIG. 1, a swing lever 15 as an operating force deflection mechanism is disposed between the upper end portion of the dead rod 6 and the main latch 3.

  The swing lever 15 is a member formed by bending a plate material into a U-shaped cross-section and forming the projection onto the side plate of the case body 1 into a substantially fan shape. The shaft 16 is pivotally supported so as to be swingable.

  Further, one end portion of the swing lever 15 close to the main latch 3 is in contact with the main latch 3 via the roller 17, and the horizontal first engagement pin 18 carried on the other end portion is shown in FIG. As shown, it is slidably engaged with an engagement hole which is an unnumbered horizontal slot opened at the upper end of the dead rod 6.

  With the configuration described above, when the main door approaches the closed position, the main latch 3 is pushed into the case body 1 by the strike plate 5, and the swing lever 15 is interlocked with the rotation of the main latch 3 as shown in FIG. As a result, as shown in FIG. 4, the dead rod 6 descends against the elasticity of the first biasing spring 14.

  At this time, when an engagement shoe, which will be described later, is inserted into a strike hole 21 (not shown) (see FIG. 4) opened on the floor surface or ceiling surface (upper frame of the door frame) and side pressure is applied to the child door, FIG. The right side surface of the engagement shoe 19 is pressed against the opening edge of the strike hole 21.

  As described above, the lower end portion of the dead rod 6 is formed in a U-shaped cross section, but the lower end portion of the operating rod 22 (see FIGS. 1 and 2) described below is also bent in a U-shaped cross section.

  And as shown in FIG. 2, the cross-sectional U-shaped part of the lower end part of the dead rod 6 and the operating rod 22 is superposed | polymerized in the nested form.

  On the other hand, as shown in FIG. 2, the engaging shoe 19 can be rotated by a support shaft 23 parallel to the door surface at the outer end of the dead rod 6 overlapped with the operating rod 22 as described above. It is supported by.

  As shown in FIG. 2, an inclined end edge 24 is integrally formed at the inner end portion of the engagement shoe 19.

  Further, although the engagement shoe 19 is biased counterclockwise in FIG. 2 by the elasticity of the torsion coil spring whose numbering is omitted for the sake of clarity, a normal state in which no external force acts on the engagement shoe 19. In this case, the inclined edge 24 is elastically brought into contact with the engaging pin 25 planted at the lower end portion of the actuating rod 22 and kept in the illustrated angular position.

  That is, the engagement shoe 19 is carried by the strike of the main door via the engagement of the inclined end edge 24 and the engagement pin 25 integrated therewith, the operating rod 22, the second operating force deflection mechanism and the sub latch described later. The

  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.

  On the other hand, as shown in FIGS. 1 and 2, the operating rod 22 extends in the vertical direction so as to overlap with the dead rod 6, and is long due to the engagement between the second support shaft 8 and the dead rod 6. It is guided to be movable in the vertical direction.

  Further, as shown in FIGS. 1 and 2, a compression coil spring 26 is elastically disposed between the operating rod 22 and the dead rod 6, and the engagement of the operating rod is caused by the elasticity of the compression coil spring 26. The mating pin 25 is biased in a direction in which it is elastically contacted with the inclined end edge 24 of the engagement shoe, and normally, the dead rod 6 and the operating rod 7 are configured to move integrally.

  On the other hand, as shown in FIG. 1, a sub-latch 27 having the same structure is disposed below the main latch 3, and the swinging motion is between the sub-latch 27 and the inner end of the operating rod 22. A swing lever 15 having the same structure as the lever 15 (see FIG. 1) is provided.

  The swing lever 15 constitutes the second operating force deflection mechanism for connecting the sub latch 27 and the operating rod 22 to each other, and one end of the swing lever 15 is in contact with the sub latch 27 via the roller 17.

  In addition, a first engagement pin not numbered is carried on the other end portion for clarity of illustration, and this first engagement pin is attached to the upper end portion of the operating rod 22 as shown in FIG. It is slidably engaged with an engagement hole that is a horizontal long hole that does not turn.

  1 to 3, reference numeral 28 denotes a compensation spring as a compression coil spring. The compensation spring 28 is, for example, when the double door lock according to the present invention is mounted above the child door, that is, the case body 1 is attached. This is intended to remove the influence of gravity acting on the dead rod 6 and the operating rod 22 when mounted upside down, and is not an essential component of the present invention. Therefore, the illustration is omitted in FIGS. .

  In the double door lock according to one embodiment of the present invention configured as described above, when the double door is open, the dead rod 6 and the operating rod 22 are energized as shown in FIGS. It is drawn into the case body 1 by the elasticity of the spring 14, and the child door is free.

  At this time, as shown in FIG. 3, the main and sub latches 3 and 27 protrude from the front plate 2.

  In this state, the child door is moved. For example, after the child door is placed at the closing angle position by hitting the door, the strike 5 is moved from the upper side of FIG. , 27 and rotate them.

  Then, as shown in FIG. 4, the dead rod 6 and the operating rod 22 are integrally pushed out of the case body, and the engagement shoe 19 attached to the outer end of the dead rod is, for example, a strike hole 21 provided on the floor surface. The child door is locked to the floor surface.

  Thereafter, the lock of the main door is operated, and a dead bolt (not shown) is inserted into the strike hole formed at the free side edge of the child door from the main door side, thus locking the double doors.

  To open both doors, the lock of the main door is first unlocked, the engagement between the main door and the child door is released, and then the child door is opened (upward in FIG. 3 and in the direction of the paper in FIG. 4). Push to the other side.

  Then, the engagement shoe 19 that floats in the strike hole 21 moves to the side facing in FIG. 4, and at the same time, the case body 1 moves downward in FIG.

  Eventually, the stop surface (right side surface in FIG. 2) of the engagement shoe 19 comes into contact with the opening edge of the strike hole 21, and the engagement shoe 19 is stopped, but the child door is further pushed in the opening direction. Then, the engagement shoe 19 turns clockwise around the support shaft 23 (see FIG. 2).

  Then, due to the wedge action generated between the inclined end edge 24 formed at the inner end of the engagement shoe and the engagement pin 25, the former pushes the latter upward.

  In this state, strong frictional engagement occurs between the stop surface of the engagement shoe and the opening edge of the strike hole, so that the engagement shoe 19 temporarily becomes the opening edge of the strike hole 21 by the frictional force. Temporarily locked.

  Therefore, in the illustrated embodiment, the operating rod 22 rises relatively with respect to the dead rod 6, and finally, as shown in FIG. 6, the inclined end edge 24 pushes up the engagement pin 25 and releases these engagements. It matches.

  Then, as shown in FIG. 6, the engagement shoe 19 can freely rotate, the engagement between the dead rod 6 and the strike is released, and the child door is opened.

  Until the state shown in FIG. 6 is reached, the engagement shoe 19 rotates while keeping in contact with the opening edge of the strike hole 21, so that the case body 1 also gradually moves in the opening direction and temporarily. As shown in FIGS. 7 and 8, the main latch 3 is retracted and only the sub-latch 27 protrudes.

  However, the state shown in FIG. 7 is a temporary state, and when the engagement of the engagement shoe 19 and the engagement pin 25 is completely released as shown in FIG. The state shown in FIG.

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 plan view. FIG. 3 is a partially sectional rear view of the double door similar to FIG. 2, showing a state in which the engagement shoe is inclined. It is a partial cross section side view of the double door lock similar to FIG. 1, and shows the state where only the sub-latch protrudes. 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. The plan view.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Case body 2 Front board 3 Main latch 5 Strike 6 Dead rod 15 Oscillating lever 17 Roller 19 Engagement shoe 21 Strike hole 22 Actuation rod 23 Support shaft 24 Inclined edge 25 Engagement pin 26 Compression coil spring 27 Sub latch

Claims (1)

  A latch device for locking a child door of both doors to a floor and / or a ceiling, a case body mounted on a lower end portion and / or an upper end portion of a free side edge portion of the child door, and projection onto a horizontal plane The shape of the fan is approximately fan-shaped, and the main part of the main door is supported so that it can rotate around the front plate of the case body, which is almost flush with the free edge of the child door, and can move in and out of the front plate. When the door is closed, a main latch that interferes with a strike attached to the free side edge of the main door and is pushed into the case body, a sub-latch connected to the main latch above or below the main latch, A dead rod that extends in a direction parallel to the free side edge of the child door, is guided to be movable in the length direction thereof, and is biased in a direction of being pulled into the case body, and an inner end portion of the dead rod and Between the main latches. At the outer end of the dead rod, there is a first operating force deflection mechanism that transmits the movement of the main latch when the main door is closed to the dead rod and drives it to be pushed out of the case body along the length direction. An engagement shoe that is pivotally supported around a horizontal support shaft parallel to the door surface and whose tip is constrained to rotate only in the closing direction of the child door and is biased in the opposite direction. In an aspect in which the inclined end edge formed integrally with the inner end portion of the engagement shoe and the case body extends in a direction parallel to the free side edge of the child door, and at least the outer end portion overlaps with the dead end. An operating rod having an engaging pin guided movably in the length direction and biased to elastically contact the inclined end edge of the engaging shoe at the outer end, and the inner end of the operating rod and the sub-latch The movement of the sub-latch when the main door is closed is transmitted to the operating rod, And a second actuation force deflection mechanism that drives it to push it out of the case body along the length direction. When pushing out the dead shoe into the strike hole provided on the floor and / or the ceiling surface while pushing the child door in the opening direction, the engagement shoe and the strike hole are pushed out integrally. The dead rod is temporarily locked in the strike hole by frictional engagement with the opening edge of the opening, and the operating rod is brought into the case body by the wedge action with the engagement pin generated by the rotation of the engagement shoe. A double door lock characterized in that the engagement shoe is released by pushing and engaging the engagement pin and the engagement shoe.

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