JP2009127191A - Automatic flush bolt - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a double swing door lock, capable of engagingly locking a sub-door to a floor surface by putting an engagement shoe installed to a tip of a dead lever in a rotatable manner into a strike hole, and releasing the locking engagement only by pushing the sub-door in an opening direction. <P>SOLUTION: The sub-door is located at a closing position, a main latch 3 is operated by closing a main door, and the dead lever 6 and an acting lever 22 are lowered in an integrated manner to put the engagement shoe 19 to the strike hole 21 at a bottom end of the dead lever 6. When the sub-door is opened, the engagement shoe 19 is elastically pressed to the strike hole 21, by pushing a case body 1 to the side toward the paper surface, to temporarily moor the former to the latter, and an engagement pin 25 of the acting lever 22 is also relatively pushed up by an inclined end edge 24 formed at an inner end portion of the engagement shoe 19, whereby the engagement of the dead lever 6 with the acting lever 22 is released. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an automatic locking device (hereinafter simply referred to as an automatic flash bolt) of a double door called a so-called double door, in particular, a strike hole and a dead bolt formed on a floor surface or a ceiling surface. The present invention relates to an automatic flash bolt that can be smoothly opened even when a side pressure is applied between the two.

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

This automatic flash bolt is a latch device for locking the child doors of both doors to the floor and / or the ceiling, and is attached to the lower end and / or the upper end of the free side edge of the child door The projection shape of the body and the horizontal plane is generally fan-shaped, and the main part can be rotated around the front plate of the case body, which is almost flush with the free side edge of the child door, and can protrude from the front plate. The main latch that interferes with the strike attached to the free side edge of the main door when the main door is closed and is pushed into the case body, 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, and this dead The inner edge and top of the heel A first operating force deflection that is arranged between the main 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. At the outer end of the mechanism and the dead rod, it is pivotally supported around a horizontal support shaft parallel to the door surface, and its tip is constrained to rotate only in the closing direction of the child door and attached in the opposite direction. A biased engagement shoe, an inclined edge formed integrally with the inner end of the engagement shoe, and a parallel to the free side edge of the child door in the case body, and at least the outer end An operating rod having an engaging pin that is guided so as to be movable in the longitudinal direction in a manner in which the portion overlaps with the dead rod and is urged to elastically contact the inclined end edge of the engaging shoe at the outer end portion, It is arranged between the inner end of the operating rod and the above sub-latch, and the sub A second actuating force deflection mechanism that transmits the movement of the hose to the actuating rod and drives it to be pushed out of the case body along the length direction. When the main door is closed, the main and sub latches are At the same time, the dead rod and working rod are integrally pushed outward, the dead shoe's engagement shoe is inserted into the strike hole provided on the floor and / or ceiling surface, while the child door is pushed in the opening direction. When moving, the dead hook is temporarily locked to the strike hole by frictional engagement generated between the engagement shoe and the opening edge of the strike hole, and between the engagement pin generated by the rotation of the engagement shoe. By the wedge 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.
Japanese Patent Application No. 2006-148380

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

  The invention described in Patent Document 1 utilizes the fact that the operating rod 22 is freed by the operation of the engagement shoe 19 in the initial stage of opening of the main door, and the main lever via the swing lever 15 is used. The latch 3 and the sub-latch 27 are projected from the front plate 2 to the standby position.

  However, as is clear from FIG. 5 of Patent Document 1, the horizontal distance between the contact point of the latch 3 (27) and the roller 17 (see FIG. 1 of Patent Document 1) and the support shaft 4 of the latch 3 (27). (The vertical distance in FIG. 5) is short, so even if the roller 17 pushes the latch to the left in FIG. 5, a sufficient rotational moment cannot be applied to the latch, and the latch is caught. There is still room for improvement, such as being difficult to protrude to the standby position.

  In this case, the force that pushes the latch to the left in FIG. 5 is the elasticity of the first urging spring 14 (see FIG. 1). If this elasticity is increased, the force that activates the dead rod will be increased. It must be large, and it requires extra force when closing the door, so the operation is not smooth.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide an automatic flash bolt that can release a latch device only by pushing a child door in an opening direction, and the return rotation of the latch is smooth.

  In order to achieve the above object, the invention according to claim 1 is a latch device for locking the child doors of both open doors to the floor surface and / or the ceiling, and the lower end of the free side edge portion of the child doors. The case body mounted on the top and / or the upper end and the projected shape on the horizontal plane are substantially fan-shaped, and the essential part is located near the front plate of the case body that is substantially flush with the free side edge of the child door. A latch that is pivotably supported by the front plate so that it can be moved in and out and interferes with a strike attached to the free side edge of the main door when the main door is closed. It is guided so as to be movable in a direction perpendicular to the front plate, biased outward, and engaged with the free end of the latch that has been pushed into the case body to push the latch in a direction protruding from the front plate. Extruded block with moving inclined surface and case 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, and is biased in a direction of being pulled into the case body, and an inner end of the dead rod Actuating force deflection mechanism that is disposed between the main body and the latch and transmits the movement of the latch when the main door is closed to the dead rod and drives it to be pushed outward from 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. Is guided to be movable in the length direction in a manner that overlaps with dead ridges, and is engaged with the outer end. And an operating rod having an engaging pin biased so as to elastically contact the inclined edge of the shoe, and when the main door is closed, the latch is operated to integrally push the dead rod and the operating rod outward. When the dead shoe engagement shoe is inserted into the strike hole provided on the floor and / or ceiling, while the child door is pushed in the opening direction, it is between the engagement shoe and the opening edge of the strike hole. Due to the frictional engagement that occurs, the dead rod is temporarily locked in the strike hole and the operating rod is pushed into the case body by the wedge action with the engagement pin generated by the rotation of the engagement shoe, thereby engaging with the engagement pin. The engagement shoe is released by releasing the engagement with the joint shoe.

  In the automatic flash bolt according to the first aspect of the present invention configured as described above, in the closed state of the two open doors, the side pressure that pushes the child door in the opening direction is attached to the outer end of the dead rod. It is carried by the strike of the main door via the engagement of the inclined end edge integral with the mating shoe and the engaging pin, the operating rod, the operating force deflection mechanism and the 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 from the strike hole of the floor surface or the upper frame by the urging force of the dead rod.

  At this time, as a result of the wedge projecting between the inclined surface of the push block and the free end of the latch, the latch protrudes from the front plate, so that the dead rod that has been held by the latch can be easily pulled out from the strike hole. It has the expected effect of becoming.

  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. In the initial stage, the inconvenience due to the side pressure applied to the tip of the dead coffin of the child door can be eliminated, and the push block has made the latch easy to protrude outward from the front plate. The dead hole that had been pressed down was smoothly pulled out from the strike hole.

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 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 latch 3 in the illustrated embodiment is a block body having a fan-shaped projection on the floor surface (horizontal plane), and is rotated in the horizontal plane by a first support shaft 4 that vertically penetrates the main part. It is pivotally supported.

  As shown in FIG. 3, the latch 3 is a strike plate 5 (see FIG. 3) 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 against the door. 4) 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. The actuating force deflection mechanism 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 a second support shaft 7 (see FIG. 1) and a third support shaft 8 so as to be movable in the vertical direction.

  As shown in FIG. 1, 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 vertically long shape in which a small diameter portion formed at one end is formed on the side surface of the case body 1. The first guide hole 9 (see FIG. 1) is slidably engaged.

  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, a 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 and is not shown. Due to the elasticity of the first biasing 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, 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 15 as an operating force deflection mechanism is disposed between the upper end portion of the dead rod 6 and the 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 latch 3 is in contact with the latch 3 via the guide block 17, and the horizontal first engagement pin 18 carried on the other end portion is shown in FIG. Thus, it engages slidably with the engagement hole which is a horizontal long hole which is not numbered and opened at the upper end of the dead rod 6.

  Incidentally, the guide block 17 is made of a low friction material such as an oil-impregnated alloy or a polyacetate resin, for example. In the illustrated embodiment, the projected shape on the side of the lock box is a triangle, so that the drawing is clear. It is pivotally supported by a non-numbered horizontal spindle.

  Then, as will be described later, when the latch 3 is pushed into the lock box, the outer surface of the guide block 17 descends along the inner end of the latch 3 and rotates around the unnumbered horizontal support shaft. Thus, the movement of the latch is efficiently transmitted to the dead cage.

  The configuration described above is almost the same as the configuration of the invention described in Patent Document 1, but the characteristic configuration of the present invention is an extruded block described below.

  As shown in FIGS. 1 and 3, the push block 10 is a flat block body that is held in an unnumbered support frame provided on the inside of the latch 3 and above the swing lever 15. 2 is guided so as to be movable in the front-rear direction perpendicular to 2, and is urged forward (outward) by a compression coil spring not numbered.

  In the normal state in which an inclined surface 10a is formed on the outer surface of the extrusion block 10 and both doors are open and the latch protrudes from the strike plate 5, as shown in FIG. Although not in contact, when the latch 3 is pushed into the lock box as shown in FIG. 6, the inclined surface 10a urges the latch 3 to rotate clockwise, and the dead bag moves. The latch 3 protrudes from the front plate to facilitate the operation of the automatic flash bolt.

  With the above-described configuration, when the main door is close to the closed position, the 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 latch 3 in FIG. As a result, the dead rod 6 descends against the elastic force of the first biasing spring 14 as shown in FIG.

  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 between the inclined end edge 24 and the engagement pin 25 integrated therewith, the operating rod 22, the operating force deflection mechanism, and the latch.

  Therefore, the engagement shoe 19 is constrained so that it cannot be further rotated clockwise (the tip of the engagement shoe is leftward) 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.

  1 and 2, reference numeral 28 denotes a compensation spring as a compression coil spring. This compensation spring 28 is, for example, when the automatic flash bolt according to the present invention is mounted above the child door, that is, the case body 1 is moved up and down. When mounted in the opposite direction, the influence of gravity acting on the dead rod 6 and the operating rod 22 is removed, and this is not an essential configuration of the present invention.

  As shown in FIGS. 1 and 2, the automatic flash bolt according to the embodiment of the present invention constructed as described above is configured such that the dead rod 6 and the operating rod 22 are biased springs as shown in FIGS. It is retracted into the case body 1 by the elasticity of 14, and the child door is free.

  At this time, the latch 3 protrudes from the front plate 2 as shown in FIG.

  In this state, the child door is moved. For example, when the child door is placed at the closing angle position by hitting the door, the strike 5 approaches the latch 3 from above in FIG. 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 (the 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.

  Accordingly, in the illustrated embodiment, the operating rod 22 rises relative to the dead rod 6, and finally, as shown in FIG. 7, the inclined end edge 24 pushes up the engagement pin 25 to release these engagements. It matches.

  Then, as shown in FIG. 7, 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.

  When the child door is opened, the swing lever that has been pressed against the latch 3 until then becomes free. As a result, the dead rod 6 rises while pushing the latch 3 outward by the elasticity of the first biasing spring 14. 1 and the standby position shown in FIG.

  At this time, the pushing block 10 operates to smoothly push the latch 3 outward.

1 is a partial cross-sectional side view of an automatic flash bolt according to an embodiment of the present invention. FIG. The partial cross-sectional top view. FIG. 2 is a partial cross-sectional side view similar to FIG. 1, showing both doors closed. FIG. FIG. 4 is a partial cross-sectional plan view similar to FIG. 3, showing a state in which the double door is closed when the latch is pushed into the lock box. FIG. 6 is a partially sectional rear view of the automatic flash bolt similar to FIG. 5, showing a state in which the engagement shoe is inclined.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Case body 2 Front plate 3 Latch 5 Strike 6 Dead rod 10 Extrusion block 10a Inclined surface 14 First biasing spring 15 Swing lever 19 Engagement shoe 21 Strike hole 22 Actuation rod 23 Support shaft 24 Inclined edge 25 Engagement pin 26 Compression coil spring

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 latch that interferes with a strike attached to the free side edge of the main door and is pushed into the case body, is guided inside the latch so as to be movable in a direction perpendicular to the front plate, and is attached to the outside. And an extrusion block that forms an inclined surface that engages with the free end of the latch that is pushed into the case body and pushes the latch in a direction that protrudes from the front plate, and a child door in the case body. Extending in the direction parallel to the free edge The dead rod that is guided to be movable in the longitudinal direction of the case and biased in the direction of being pulled into the case body, and is disposed between the inner end of the dead rod and the latch, and the latch when the main door is closed Actuation force deflection mechanism that transmits the movement to the dead cage and pushes it out of 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 An engagement shoe that is pivotally supported so as to be pivotable, the tip of which is constrained to be pivotable only in the closing direction of the child door, and biased in the opposite direction, and an inner end of the engagement shoe are integrated with each other In the case body, it extends in a direction parallel to the free side edge of the child door, and at least the outer end portion is guided so as to be movable in the length direction in such a manner that it overlaps with a dead bag. The engagement pin biased to elastically contact the inclined end edge of the engagement shoe at the outer end. When the main door is closed, the latch is operated to push out the dead rod and the operating rod integrally outward, and the engagement shoe of the dead rod is provided on the floor surface and / or the ceiling surface. When it is inserted into the strike hole and the child door is pushed in the opening direction, the dead rod is temporarily locked in the strike hole by the frictional engagement generated between the engagement shoe and the opening edge of the strike hole. The operating rod is pushed into the case body by the wedge action between the engagement shoe and the engagement pin, and the engagement shoe is released by releasing the engagement between the engagement pin and the engagement shoe. A double door lock characterized by that.

Images