JP2007332648A - Earthquake resistant locking mechanism - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an earthquake resistant locking mechanism which is resistant against unlocking even if an exciting force is applied thereto due to an earthquake, mechanical vibration, or the like. <P>SOLUTION: There is provided a hotel lock which can be released by moving a rack 12 in a right direction that is an unlocking direction, with a sector gear 11 turnable counterclockwise by turning a duplicate key in the unlocking direction, and slightly turning a locking lever clockwise with a control pin 16 engaged with a cam groove 8 formed in the locking lever 7. Herein the hotel lock has a hammer lever arranged in the vicinity of a driving plate 13, and in normal times, i.e. in a state where no vibration is applied to a lock box, a protector pin 25 implanted at an edge of the hammer lever is brought into elastic contact with an inclined edge formed at a rear edge corner of the driving plate. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an anti-seismic locking mechanism for an electric lock or a so-called hotel lock, and more particularly to an anti-seismic locking mechanism that does not cause a problem even if it receives an excitation force from an earthquake or mechanical vibration.

  In the locking mechanism having a locking bolt that includes a latch bolt that also serves as a dead bolt and has a latch lever that is biased to engage the tip of the stepped portion of the latch head. An anti-seismic locking mechanism that does not unlock due to earthquake or vibration was proposed.

  The anti-seismic locking mechanism according to claim 1 of Patent Document 1 is guided so as to be movable in the front-rear direction perpendicular to the front plate in the lock box, and is urged forward in the direction protruding from the front plate. A latch bolt having a latch head formed with a slanted surface, and in the vicinity of the latch bolt, in a lock box near the front plate, and around the first support shaft in a plane parallel to the side plate of the lock box. A locking lever that is pivotally supported and whose front end is biased in a direction to engage with a stepped portion of the latch head, in the vicinity of the first supporting shaft, A second support shaft is provided on the opposite side, and the brake lever is supported on the second support shaft so as to be rotatable in a plane parallel to the side plate of the lock box, and its front end is attached in a direction away from the latch bolt. On the other hand, the center of gravity of the brake lever Set the shape and dimensions of the brake lever so that it is positioned, and reverse the movement of the front end of the lock lever when an excitation force is applied to the lock box, and the latch on the front end of the lock lever. The movement of the head in the direction away from the stepped portion is suppressed by the movement of the front end portion of the brake lever.

Further, the anti-seismic locking mechanism according to claim 2 of Patent Document 1 is guided to be movable in the front-rear direction perpendicular to the front plate in the lock box, and is urged forward in the direction protruding from the front plate. A latch bolt mounted with a latch head having a bevel at the front end, and disposed in a lock box near the front plate in the vicinity of the latch bolt, and in a plane parallel to the side plate of the lock box. A locking lever that is supported so as to be rotatable about its front end and that is biased in a direction in which its front end engages with a stepped portion of the latch head, is latched with respect to the first supporting shaft in the vicinity of the first supporting shaft. A second support shaft is provided on the opposite side of the bolt, and a brake lever that is not biased by a spring is supported on the second support shaft so as to be rotatable in a plane parallel to the side plate of the lock box. The position is arranged behind the second spindle and its tip is It is characterized in that as elastic contact with the front end portion of the stop lever.
JP 2006-097456

  However, in the anti-seismic locking mechanism according to claim 1 of the above-mentioned Patent Document 1, the tip of the braking lever 21 is separated from the locking lever 8 in a normal state where no excitation force is applied. There is still room for improvement, such as the possibility of delays in operation.

  In the anti-seismic locking mechanism according to claim 2 of Patent Document 1, the tip of the brake lever 21 is in elastic contact with the lock lever 8 in a normal state where no excitation force is applied. Since it is estimated that the coefficient of restitution with the locking lever is not large, there is still room for improvement, such as not being able to expect a sufficient anti-seismic function.

  Then, this invention aims at providing the anti-seismic locking mechanism which can improve the anti-seismic locking mechanism described in the said patent document 1, and can operate | move reliably.

  In order to achieve the above object, the present invention is guided so as to be movable in the front-rear direction perpendicular to the front plate in the lock box, and is urged forward in the direction protruding from the front plate to form a slope at the front end. A latch bolt that also serves as a dead bolt equipped with a latch head, and is arranged in the lock box near the front plate in the vicinity of the latch bolt, and around the first support shaft in a plane parallel to the side plate of the lock box. A locking lever that is rotatably supported and whose front end is urged in a direction to engage with the stepped portion of the latch head, and extends in the front-rear direction in the vicinity of the locking lever, and is guided to be movable in the same direction. And having a drive plate that controls the rotation of the locking lever in conjunction with the movement in the front-rear direction, one end of which is rotatably supported by the second support shaft, and the center of gravity at the other end. Hammer lever set On the other hand, an inclined edge is formed at the rear end corner of the drive plate, and on the other hand, a protector pin is implanted at one end of the hammer lever, and the front end of the locking lever engages with the stepped portion of the latch head. When stopping, the hammer lever is urged so that the protector pin elastically contacts the inclined edge of the drive plate, and when the drive plate is vibrated so as to move in the unlocking direction, the rotation moment applied to the hammer lever The protector pin is brought into contact with the inclined edge of the drive plate to prevent the drive plate from moving in the unlocking direction.

  In the invention according to claim 1 configured as described above, when an excitation force is applied to the lock box due to an earthquake or vibration, an acceleration is applied to the center of gravity of the hammer lever due to the excitation force.

  As a result, the hammer lever rotates in the direction in which the protector pin abuts against the inclined edge of the drive plate, and as a result, a component force is generated that pushes the drive plate forward, so that the drive plate is prevented from moving backward. Thus, it is possible to prevent the locking mechanism from being unlocked due to an earthquake or vibration.

  In addition, the protector pin of the hammer lever is always in elastic contact with the inclined edge formed at the corner of the rear end of the drive plate, so that the drive plate moves backward at the moment when the excitation force is applied to the lock box. There is no delay in the control because it prevents it.

  On the other hand, in a normal state where no excitation force is applied to the lock box, when the drive plate is moved backward by the locking / unlocking mechanism, the protector pin is removed from the drive plate by the wedge action generated between the inclined edge and the protector pin of the hammer lever. In other words, the hammer lever moves only in the direction opposite to the urging direction, and thus has various effects such as not causing any trouble in the operation of the lock box.

  An angled edge is formed at the rear end corner of the drive plate that controls the locking lever, and a hammer lever is provided with one end pivotally supported by the second support shaft and the center of gravity set at the other end. Install a protector pin on one end of the hammer lever, and attach the hammer lever so that the protector pin elastically contacts the inclined edge of the drive plate when the front end of the lock lever engages the stepped portion of the latch head. When the actuator is vibrated, the protector pin is brought into contact with the inclined edge of the drive plate by the rotational moment applied to the hammer lever, and the drive plate is prevented from moving in the unlocking direction. An anti-seismic locking mechanism that does not cause problems even when subjected to an excitation force from mechanical vibrations, etc. could be constructed.

An embodiment of the present invention will be described below with reference to the drawings.
In FIG. 1, reference numeral 1 denotes a lock box, and reference numeral 2 denotes a latch bolt that also serves as a dead bolt.

  The latch bolt 2 is guided in the lock box 1 so as to be movable in the front-rear direction (left-right direction in the figure) perpendicular to the front plate 3, and a latch head 4 having a slope 4 a is attached to the front end.

  The latch bolt 2 is biased forward, that is, leftward in the figure, by the elasticity of the latch bolt spring 5 as a compression coil spring.

  In addition, the protrusion position at the time of locking of the illustrated latch bolt is determined by the engagement between a part of the latch bolt 2 and an opening through which an unnumbered latch head of the front plate 3 enters and exits.

  On the other hand, as shown in FIG. 1, a first support shaft 6 is implanted in the lock box side plate 1a below the latch bolt 2, and a lock lever 7 is rotatably supported on the first support shaft 6. Has been.

  As shown in FIG. 1, the locking lever 7 in the illustrated embodiment is an elongated thick plate body, and its front end (left end) faces the stepped portion of the latch head 4 so as to be engageable, Is formed with a substantially U-shaped cam groove 8 opened obliquely upward.

  Further, the locking lever 7 is biased by a torsion coil spring 9 wound around the first support shaft 6 in a counterclockwise direction in FIG. 1, in other words, in a direction to engage with a step portion of the latch head 4. Has been.

  In the illustrated embodiment, the front end of the locking lever 7 is arranged to engage with the stepped portion of the latch head 6 from the rear.

  The control mechanism of the locking lever 7, in other words, the locking / unlocking mechanism of the hotel lock in the illustrated embodiment is not the gist of the present invention, but the anti-seismic locking mechanism according to the present invention does not interfere with the locking / unlocking mechanism. In order to show this, the hotel locking / unlocking mechanism will be briefly described below.

  That is, in FIG. 1, reference numeral 11 denotes a sector gear connected to a cylinder lock (not shown). The sector gear 11 is guided in the front-rear direction in the lock box and meshes with the rack 12 biased forward.

A drive plate 13 is inserted between the rack 12 and the locking lever 7.
As shown in FIGS. 2 and 3, the drive plate 13 is a plate material whose projection shape onto the lock box side plate is substantially L-shaped (see FIG. 3), and locks the guide pins 14 and 14 implanted on one surface thereof. Each of the guides is slidably engaged with a horizontal guide hole (not numbered in FIG. 1 for the sake of clarity) formed in the side plate of the box so as to be movable in the horizontal direction.

  As shown in FIGS. 2 and 3, the front plate edge and the rear plate edge of the drive plate 13 are bent to the front side to form guide pieces 15, 15. 1 is in sliding contact with the inner surface of the side plate of the front lock box in FIG. 1 to prevent the drive plate 13 from falling.

  Further, a control pin 16 projecting toward the front side is planted in an L-shaped bent portion of the drive plate 13, and a tip portion thereof is engaged with the cam groove 8 of the locking lever 7.

  Furthermore, rack guide pins 17 are planted at the rear end corners of the drive plate 03, and these rack guide pins 17 project downward at the rear end of the lower end of the rack 12, as shown in FIG. It faces the engaging piece 18 provided so that it can be engaged from behind.

  In addition, as shown in FIGS. 2 and 3, a bifurcated engagement portion 19 is formed at the rear end portion of the lower end of the drive bolt 13 on the latch bolt 2 side by bending a pair of projecting pieces toward the front side. An engaging pin 21 protruding from the rear end portion of the latch bolt 2 is engaged with the engaging portion 19.

  With the above configuration, when a key is inserted into a key hole of a cylinder lock (not shown) and rotated in the unlocking direction (counterclockwise in FIG. 1), the rack 12 moves to the right in FIG. The engagement piece 18 abuts on the rack guide pin 17 of the drive plate and pushes it backward.

  Then, the drive plate 13 starts to move rearward following the rack 12, and the control pin 16 (see FIGS. 2 and 3) is projected into the cam groove 8 when the drive plate 13 starts to move. And the locking lever 7 is rotated in the clockwise direction. As a result, the front end of the locking lever is retracted out of the movement path of the latch head 4 and the hotel lock is unlocked.

  Thereafter, if the key is further rotated, the rack 12 moves rearward together with the latch bolt 2, and the latch head 4 is pulled into the lock box, so that the door can be opened.

  When the door is closed again after opening the door, the front end of the locking lever 7 rides on the top surface of the latch head 4, so that it can be automatically latched by releasing your hand or removing the key from the keyhole. The head is inserted into the strike hole, and the locked state shown in FIG. 1 is obtained.

  The above-described locking mechanism is a purposeful mechanism as a locking mechanism for a hotel lock. In the present invention, a hammer lever 22 is added in addition to the locking mechanism for a hotel lock described above.

  As shown in FIG. 4, the hammer lever 22 has, for example, an inverted L-shape as a whole, and one end (left end in FIG. 4) is planted on the lock box side plate on the lower side (facing side) of the rack 7 shown in FIG. For example, a second support shaft (not shown) is supported so as to be rotatable around a rotation center 23 shown in FIG.

  Further, a weight 24 is caulked to the other end portion of the hammer lever 22, so that the center of gravity of the hammer lever 22 is set to be placed at the other end portion.

  Furthermore, a protector pin 25 (see FIGS. 3 and 4) is implanted at one end of the hammer lever 22 on the front side in FIG.

  In addition, the hammer lever 22 is urged clockwise in FIG. 1 by a torsion coil spring wound around the second spindle (not shown), and the urging force does not apply an exciting force to the lock box. In a normal state, the protector pin 25 is in elastic contact with an inclined edge 26 (see FIG. 3) formed at the rear end corner of the drive plate 13 (see FIG. 1).

  In addition, the formation location of the inclined edge 26 of the drive plate and the projection location of the protector pin 25 of the hammer lever are set so that they are normally engaged with each other. In the locked state shown in FIG. As described above, 25 is in elastic contact with the inclined edge 26.

  The anti-seismic locking mechanism according to one embodiment of the present invention configured as described above is based on the wedge action generated between the inclined edge 26 and the protector pin 25 during the unlocking operation in a normal state where the lock box is not vibrated. As the inclined edge 26 moves rearward, the protector pin 25 rides on the upper edge of the drive plate 13, and as a result, the hammer lever 22 rotates only slightly in the clockwise direction. Absent.

  On the other hand, when the vibration due to an earthquake or other cause is applied to the lock box, the component of the excitation force toward the left in FIG. 1 accelerates the lock box in the same direction.

  Then, in the conventional lock box, while the drive plate 13 and the rack 12 try to stay at the current position due to inertia, the lock box is accelerated forward, so that it is as if the blade is retracted by hitting the head of the bag. Due to the phenomenon, the rack and the drive plate (as well as the conventional lock box) move relatively in the unlocking direction, and the lock is unlocked.

  However, in the anti-seismic locking mechanism according to the present invention, each time an impact that causes movement of the drive plate 13 in the unlocking direction occurs, the protector pin 25 of the hammer lever 23 does not insert a gap, and the drive plate Because it strikes against the slanted edge 26 in the locking direction, the lock is not unlocked by an earthquake or vibration.

The partial cross section side view of the lock box provided with the anti-seismic locking mechanism by one Example of this invention. The top view of a drive plate. The side view. The side view of a hammer lever. The rear view of a hammer lever.

Explanation of symbols

1 Lock box 2 Latch bolt that doubles as a dead bolt.
3 Front plate 4 Latch head 6 First support shaft 7 Locking lever 8 Cam groove 11 Sector gear 12 Rack 13 Drive plate 14 Guide pin 16 Control pin 17 Rack guide pin 18 Engagement piece 19 Engagement part 21 Engagement pin 22 Hammer Lever 24 Weight 25 Protector pin 26 Inclined edge

Claims (1)

  A latch bolt that is also guided inside the lock box so as to be movable in the front-rear direction perpendicular to the front plate, and is biased forward in the direction protruding from the front plate, and also serves as a dead bolt with a latch head having a slope formed at the front end. In the vicinity of the latch bolt, it is disposed in a lock box near the front plate, and is rotatably supported around the first support shaft in a plane parallel to the side plate of the lock box. A locking lever urged in a direction to engage with the stepped portion, and extends in the front-rear direction in the vicinity of the locking lever, is guided to be movable in the same direction, and interlocks with the movement in the front-rear direction. And a driving plate for controlling the rotation of the locking lever, and provided with a hammer lever having one end rotatably supported by a second support shaft and a center of gravity set at the other end. Tilt to the rear corner On the other hand, a protector pin is implanted at one end of the hammer lever, and when the front end of the locking lever engages with the stepped portion of the latch head, the protector pin is elastically applied to the inclined edge of the drive plate. When the hammer lever is urged to contact and the drive plate is vibrated to move in the unlocking direction, the protector pin is brought into contact with the inclined edge of the drive plate by the rotational moment applied to the hammer lever, Anti-seismic locking mechanism characterized in that the drive plate is prevented from moving in the unlocking direction.

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