JP4651009B2 - Anti-seismic locking mechanism - Google Patents

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.

  The applicant of the present invention has previously described a lock by a lock lever (first lock lever 39 in Patent Document 1) urged so as to engage the tip of the step portion of the latch head 7a with Patent Document 1 described later. A stopping mechanism was proposed.

This locking mechanism is automatically locked when the latch bolt, which also functions as a dead bolt, protrudes from the front plate of the lock box by its urging force, and is not the gist of the invention when the retractor or the solenoid of the electric lock is activated. The locking mechanism is omitted from the movement locus of the latch head 7a, and the locking lever engages with the step portion of the latch head and is automatically locked.
Japanese Utility Model Publication No. 61-150965

  It is well known in the so-called lock industry that there are many other locking mechanisms of this type, each being used for many years.

  Since the locking mechanism described in Patent Document 1 or the so-called hotel lock illustrated in the embodiments described later hangs the rooftop, the locking lever engaged with the stepped portion of the latch head is used. It does not incorporate a stable mechanism.

  Therefore, it cannot be said that there is no possibility that an earthquake will occur in the locked state, or there is a vibration source such as road construction or machinery, and the drive system for locking will not resonate with this. There is a possibility that the locking lever rides on the upper or lower surface of the latch head and the locking mechanism is unlocked.

  The latch bolt or the lock lever has an inertia or a moment of inertia, respectively, and is urged in a predetermined direction to form a vibration system. When the lock lever is retracted from the movement trajectory of the latch head due to vibration, the latch head happens to be pulled into the lock box against the urging force, and the latch bolt cannot protrude due to dust caught in the guide mechanism. Such a phenomenon can occur.

  Of course, such an inconvenience did not actually occur, but the present inventors confirmed that such a tendency was found as a result of experiments using a vibrator.

  In view of this, an object of the present invention is to provide a locking mechanism that locks and unlocks by engaging and disengaging the locking lever with the stepped portion of the latch head. An object of the present invention is to provide a locking mechanism and further improve the safety of the lock without the above-mentioned concerns.

  In order to achieve the above object, the invention according to claim 1 is guided so as to be movable in the front-rear direction perpendicular to the front plate in the lock box, and urged forward in the direction protruding from the front plate, Latch bolt with a latch head with a bevel at the front end, and 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 Having a locking lever urged in a direction in which the front end engages with a stepped portion of the latch head, the latch bolt with respect to the first support shaft in the vicinity of the first support shaft. A second support shaft is provided on the opposite side to the second support shaft, 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 separated 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 located at the rear end, and reverse the movement of the front end of the lock lever when an excitation force is applied to the lock box and that of the brake lever. The movement of the front end of the brake head in the direction away from the stepped portion of the latch head is suppressed by the movement of the front end of the brake lever.

  Further, the invention according to claim 2 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 fitted with a latch head, and in the vicinity of the latch bolt, in a lock box close to the front plate, and rotatably supported around the first support shaft in a plane parallel to the side plate of the lock box. And having a locking lever biased in a direction in which the front end is engaged with the stepped portion of the latch head, in the vicinity of the first support shaft, on the opposite side of the first support shaft from the latch bolt. Two support shafts are provided, and a brake lever that is not urged 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. Arranged at the rear, the front end of the locking lever Characterized in that as elastic contact.

  In the anti-seismic locking mechanism according to the first aspect of the present invention configured as described above, when an excitation force is applied to the lock box due to an earthquake or vibration, the locking lever and the brake lever are caused by the excitation force. Acceleration is applied to the center of gravity of both.

  Since the forces acting on the front ends of the locking lever and the braking lever are opposite to each other, when the front end of the locking lever is released from the stepped portion of the latch head and revolves out of its movement restriction, The front end of the brake lever rotates in the direction approaching the latch bolt, and the front end of the locking lever is prevented from coming off from the step portion of the latch head.

  On the other hand, when the front end of the locking lever rotates in a direction close to the latch bolt, the front end of the braking lever rotates in a direction away from the latch bolt and is also separated from the locking lever. There is no problem because the locking action of is stronger.

  In the invention described in claim 2, when the excitation force is large, the tip of the locking lever collides with the braking lever, and the locking lever transmits most of its kinetic energy to the braking lever by a repulsive action. The lock lever is left in the engagement angle position with the stepped portion of the latch head, and only the brake lever is rotated.

  In this way, even if the tip of the locking lever moves in a direction away from the stepped portion of the latch head due to an earthquake, vibration, etc., the movement is blocked by the left side of the braking lever, and the locking is released. There is an effect that there is no.

  Since the brake lever that extends in the front-rear direction on the side opposite to the latch bolt is rotatably provided with respect to the lock lever, and its center of gravity is arranged at the rear end, the excitation force due to vibration is exerted on the lock lever and The direction of the force exerted on the front end of the braking lever can be reversed, and such a simple mechanism can effectively prevent the locking mechanism from being unlocked by vibration.

  Embodiments of the present invention will be described below with reference to the drawings. In the first embodiment, an embodiment of the invention described in claim 1 will be described.

  1 to 3 are side views showing the lock box with the cover plate removed, and in these drawings, reference numeral 1 denotes a latch bolt that also serves as a dead bolt.

  The latch bolt 1 is guided in a lock box 2 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 4a is mounted at the front end.

  The latch bolt 1 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 board 6 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 7 is implanted in the lock box side plate 2a below the latch bolt 1, and a lock lever 8 is rotatably supported on the first support shaft 7. Has been.

  As shown in FIG. 4, the locking lever 8 is a plate material in which a projection shape with respect to a horizontal plane is bent into an elongated U-shape, and is reinforced by a bridge plate 8 a.

  As shown in FIGS. 1 to 3 and 4, the locking lever 8 is normally designed such that its center of gravity is positioned forward of the first support shaft 7.

  The locking lever 8 is wound in the clockwise direction in FIG. 1, in other words, the stepped portion of the latch head 4 by a torsion coil spring wound around the first support shaft 7 and not numbered for the sake of clarity. It is urged in the direction to engage.

  In the illustrated embodiment, the front end of the locking lever 8 is arranged to engage the end of the latch board 6 from the rear.

  The control mechanism of the locking lever 8, 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 9 denotes a sector gear connected to a cylinder lock (not shown). The sector gear 9 is guided in the front-rear direction in the lock box and meshes with the rack 11 biased forward.

  On the other hand, a bent portion 14 is formed at a free lower end portion of the control lever 13 that is rotatably supported at one end by the control lever shaft 12, and the bent portion 14 is engaged with the engaging end 8b ( (See FIG. 5).

  As shown in FIG. 3, an engagement protrusion 15 is integrally formed on the rack 11, and the engagement protrusion 15 is engaged with a shallow recess 16 formed on the control lever.

  With the configuration described above, when a key is inserted into a key hole of a cylinder lock (not shown) and rotated in the unlocking direction described above, the rack engaging protrusion 16 is moved from the shallow recess 16 at the initial stage of the rotation. In order to come out, the engaging protrusion 16 rotates the control lever 13 clockwise, so that the bent portion 14 pushes the engaging end 8b of the locking lever forward, and the front end of the locking lever 8 is the latch head. Retreat out of the movement trajectory 4.

  Thereafter, if the key is further rotated, the rack 11 moves rearward together with the latch bolt 1, and the latch head 4 is pulled into the lock box, so that the door can be opened.

  Incidentally, FIG. 3 does not show the case where the lock lever 8 is rotated in the unlocking direction by the key combination, but the lock lever is rotated in the unlocking direction because the trigger bolt 17 protrudes out of the lock box when the door is opened. Shows the case.

  When the door is closed again after the door is opened, the door cannot be closed if the locking lever 8 is in the locked state. Therefore, as shown in FIGS. Yes.

  Corresponding to this, a trigger arm 19 made of, for example, a synthetic resin with good slippage is provided so as to be superposed on the locking lever 8.

  As shown in FIG. 6, the trigger arm 19 has a receiving hole 19a fitted to the first support shaft 7 (see FIG. 1) at the base end (right end in FIG. 6), a slope 19b at the tip, and a central portion. The lever bodies are formed with inverted trapezoidal engagement protrusions 19c on the front side.

  The trigger arm 19 is integrally coupled to the opposite side in FIG. 1 (upper side in FIG. 4) of the locking lever 8 with the engagement protrusion 19c fitted in the dovetail groove 7c shown in FIG. Yes.

  The trigger arm 19 configured as described above rotates about the first support shaft 7 integrally with the locking lever 8, but the door opens and the trigger bolt 17 protrudes forward as shown in FIG. In this case, the unlock pin 18 engages with the slope 19b (see FIG. 6) of the trigger arm and pushes down the lock lever 8, so that the lock mechanism is unlocked.

  The above-described locking mechanism is a purposeful mechanism as a locking mechanism for a hotel lock. In the present invention, a braking lever 21 is added in addition to the locking mechanism for a hotel lock described above.

  That is, as shown in FIGS. 1 to 3, in the vicinity of the first support shaft 7 implanted in the side plate 2 a of the lock box, the second support shaft 22 on the opposite side of the first support shaft 7 from the latch bolt 1. Has been planted.

  A brake lever spring 23 as a torsion coil spring wound around the second support shaft 22 is supported on the second support shaft 22 so that the central portion of the brake lever 21 having a substantially L-shape as a whole can be rotated. Due to the elasticity of (see FIG. 1), the front end is applied in the counterclockwise direction in FIG.

  As shown in FIGS. 1 to 3 and FIG. 7, the brake lever 21 is a lever body that is formed by bending a plate material, and its rear end portion is made heavy by folding the plate material. As a result, the brake lever 21 is bent. The brake lever is shaped and dimensioned so that its center of gravity is located at the rear end, in other words, behind the second support shaft 22.

  In FIG. 1, reference numeral 24 denotes a strike plate mounted on the door frame.

  In the anti-seismic locking mechanism according to one embodiment of the invention described in claim 1 configured as described above, in a normal state where no excitation force is applied to the lock box, as shown in FIG. Since it is separated from the locking lever 8, it does not interfere with the function as a hotel lock.

  On the other hand, when an excitation force is applied to the lock box due to an earthquake or mechanical vibration, the front end portion of the lock lever 8 and that of the brake lever 21 rotate in the opposite directions, as shown in FIG. In addition, the locking lever 8 that is about to come off from the stepped portion of the latch head is pushed back in the locking direction by the front end portion of the braking lever 21, and as a result, the front end of the locking lever 8 is prevented from coming off the stepped portion of the latch head 4 This is as described above.

  7 shows an anti-seismic locking mechanism according to an embodiment of the invention described in claim 2, and differs from the invention described in claim 1 shown in FIG. 1 in that the brake lever spring 23 (see FIG. 1) of the brake lever 21 is different. The weight 25 is attached to the rear end of the brake lever 21 instead.

  As a result, the brake lever 21 is urged clockwise, and the front end of the brake lever 21 comes into contact with the front end of the locking lever 8.

  According to the second aspect of the invention configured as described above, when the front end of the locking lever 8 receives an excitation force in a direction away from the stepped portion of the latch head 4, the front end of the locking lever 8 is It collides with the front end of the brake lever 21.

  As a result, the brake lever 21 is kicked at its front end by the locking lever 8 and rotated counterclockwise. On the other hand, the locking lever loses its kinetic energy due to the collision, and the latch head 4 shown in FIG. It remains in the engagement angle position.

  The operation of the second aspect of the invention can be easily understood by referring to the repulsion mode of the steel ball shown in FIG.

  That is, it is assumed that the steel balls S1 to S3 are stationary in FIG. 9, and when the steel ball S4 is swung down in the direction of the arrow from the position shown by the chain line, it collides with the steel ball S3 at the angular position shown by the solid line, and the repulsion The force is transmitted to the steel ball S1 through the steel ball S2, and the steel ball S1 jumps up to a position indicated by a chain line.

  On the other hand, the steel ball S4 transmits all the kinetic energy to the steel ball S1 and stops at the position indicated by the chain line, and thereafter repeats this operation while switching the direction.

  The operation principle of the invention described in claim 2 is the same as that in which one of the steel balls S1 and S4 is replaced by the locking lever 8 and the other is replaced by the braking lever 21, and in this case, the intermediate steel balls S2 and S3 Is necessary for stopping the steel ball by inertia resistance, and is not necessary in the invention of claim 2.

1 is a partial cross-sectional side view of a lock box of a hotel lock equipped with an anti-seismic locking mechanism according to an embodiment of the present invention, and shows a normal state where no excitation force is applied. 1 is a partial cross-sectional side view of a lock box of a hotel lock equipped with an anti-seismic locking mechanism according to an embodiment of the present invention, and shows a state in which a braking lever is activated by applying an excitation force. It is a partial cross section side view of the lock box of the hotel lock similar to FIG. 1, and shows an open door state. The top view of a locking lever. The side view of a locking lever. The side view of a trigger arm. The top view of a brake lever. FIG. 5 is a partial cross-sectional side view of a hotel lock box equipped with an anti-seismic locking mechanism according to an embodiment of the present invention, and shows a normal state where no excitation force is applied. The diagram for demonstrating the operation | movement principle of invention of Claim 2.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Latch bolt 2 Lock box 3 Front plate 4 Latch head 6 Latch board 7 1st spindle 8 Locking lever 21 Brake lever 22 2nd spindle 23 Brake lever spring 25 Weight

Claims (2)

  A latch bolt that is guided so as to be movable in the front-rear direction perpendicular to the front plate in the lock box, is urged forward in a direction protruding from the front plate, and has a latch head that forms a slope at the front end, and the latch Located in the lock box near the front plate in the vicinity of the bolt, is supported so as to be rotatable around the first support shaft in a plane parallel to the side plate of the lock box, and the front end is engaged with the step portion of the latch head. And a locking lever that is biased in the mating direction, a second support shaft is provided on the opposite side of the first support shaft from the latch bolt in the vicinity of the first support shaft. The brake lever is pivotably supported in a plane parallel to the side plate of the lock box, and its front end is urged away from the latch bolt, while the center of gravity of the brake lever is located at the rear end. The shape and dimensions of the brake lever When the excitation force is applied to the lock box, the movement of the front end of the lock lever is opposite to that of the brake lever, and the front end of the lock lever moves away from the step of the latch head. The anti-seismic locking mechanism is characterized in that the movement is restrained by the movement of the front end of the brake lever.   A latch bolt that is guided so as to be movable in the front-rear direction perpendicular to the front plate in the lock box, is urged forward in a direction protruding from the front plate, and has a latch head that forms a slope at the front end, and the latch Located in the lock box near the front plate in the vicinity of the bolt, is supported so as to be rotatable around the first support shaft in a plane parallel to the side plate of the lock box, and the front end is engaged with the step portion of the latch head. And a locking lever that is biased in the mating direction, a second support shaft is provided on the opposite side of the first support shaft from the latch bolt in the vicinity of the first support shaft. In addition, a brake lever not urged by a spring is rotatably supported in a plane parallel to the side plate of the lock box, and the center of gravity of the brake lever is disposed behind the second support shaft, and its tip is locked. Characterized by elastic contact with the front end of the lever Tai Sin locking mechanism.

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