JP2008019622A - Sickle lock - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sickle lock without being locked, even if a sliding door is forcibly closed. <P>SOLUTION: This sickle lock has a dead bolt 3 movably guided in the longitudinal direction vertical to a front plate 2 in a lock box 1 and forming a driven cutout 6 in a rear end part, a dead cam 8 having an operation arm 7 engaging with the driven cutout 6 and linked with an inner cylinder and/or a thumb-turn of a cylinder lock, and a sickle 5 link4ed with the dead bolt 3, shaken outside by interlocking with its advance and locked on an opening edge inner surface of a strike hole. A change spring 23 for switching the 3energizing direction between a locking angle position of the operation end and an unlocking angle position, is elastically installed between the operation end 19 for elastically installing a spring member 17 for energizing the dead bolt backward in the lock box and formed in a symmetrical angle position with the operation arm on its rotational center in the dead cam and a spring hooking column 22 implanted in a side plate of the lock box. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a lock for a sliding door called a so-called kama lock, and more particularly to a kama lock that does not enter a locked state even when the sliding door is closed without completely pulling the kama into the lock box.

  As shown in FIGS. 4 to 6, the lock for a certain kind of sliding door includes a dead bolt 3 guided so as to be movable in the front-rear direction (left-right direction in the figure) perpendicular to the front plate 2 in the lock box 1. ing.

  On the other hand, in the lock box 1, a support shaft 4 is implanted at a position close to both the front plate 2 and the dead bolt 3. It is connected to the dead bolt 3, and when the dead bolt 3 moves forward (to the left in the figure), the hook 5 swings outward and is locked to the inner surface of the opening edge of the strike hole of the strike plate (not shown). ing.

Similar to a normal dead bolt, a driven notch 6 is formed at the rear end portion of the dead bolt 3. By rotating a dead cam 8 that engages with the driven notch 6, FIGS. The deadbolt 3 is driven forward in the order shown in FIG. 6 and the hook 5 is shaken out as described above to lock the sliding door to the door frame.
JP-A-9-279919

  For example, as shown in FIG. 5, the above-described kama lock opens the sliding door in a state where the dead bolt 3 protrudes slightly from the front plate, in other words, before it is completely unlocked, and closes the sliding door vigorously after entering the room. Then, there arises a disadvantage that the deadbolt 3 and the hook 5 protrude forward due to inertia and lock the sliding door.

  In this case, for example, in a room such as a warehouse where there is only an unlocking / unlocking means, there is a risk that a person entering the room will be trapped.

  In the illustrated Kama lock, the click lever 9 is elastically contacted with a mountain-shaped click member 11 formed integrally with the dead cam in order to stably maintain the locked state (FIG. 6) and the unlocked state (FIG. 4) of the Kama lock. However, the locking force of about the level of the illustrated brake mechanism cannot suppress the protrusion of the dead bolt 3 and the hook 5 due to impact.

  Therefore, the present applicant previously proposed a click mechanism having a large locking force using the above-mentioned Patent Document 1, but there is still room for improvement, such as the click mechanism having a slightly complicated structure and high cost.

  Accordingly, an object of the present invention is to provide a hook lock provided with a click mechanism of a simple mechanism in which the hook does not protrude from the front plate even when the sliding door is closed with a sharp.

  In order to achieve the above-mentioned object, the invention described in claim 1 is a dead bolt which is guided so as to be movable in the front-rear direction perpendicular to the front plate in the lock box, and which has a driven notch formed on the rear end, A dead cam linked to the inner cylinder and / or thumb turn of the cylinder lock, and an operating arm that engages with the driven notch, linked to the dead bolt, and swung outward in conjunction with its advancement to open the strike hole A spring member that urges the dead bolt backward in the lock box, and has an angular position symmetrical to the operating arm with respect to the center of rotation of the dead cam. Between the operating end formed on the side of the lock box and the spring-loaded support post planted on the side plate of the lock box, a spring is mounted that switches the biasing direction between the locking angle position and the unlocking angle position of the operation end. What you did And butterflies.

  The Kama lock according to the first aspect of the present invention configured as described above is a conventional kama tablet because, in the locked state, the elasticity of the spring member and that of the thought spring are combined to push the dead bolt backward. For example, a halfway position as shown in FIG. 5 is not taken.

  For the same reason, even if the sliding door closes vigorously and the dead bolt tries to protrude forward due to the inertial force, if the sum of the elasticity of the spring member and the thought spring is set larger than the inertial force, the hook lock will close. Can be effectively prevented.

  In addition, since the structure of both the spring member and the thought spring is simple, the configuration of the hook lock can be simplified and the weight can be reduced.

  Eliminates the conventional click lock lever of the Kama lock and replaces it with a spring member and a thought spring instead, enabling the Kama lock to be automatically locked when the sliding door is closed with force. I was able to prevent it.

An embodiment of the present invention will be described below with reference to FIGS.
In FIG. 1, reference numeral 3 denotes a dead bolt, which is a frame material obtained by folding a plate material into a U-shape, and is formed at the rear end portion thereof, similar to that of the conventional kama lock shown in FIGS. The horizontal guide hole 12 and the guide pin 13 planted in the lock box side plate are engaged with each other, and the unnumbered dead bolt opening opened in the front plate 2 is engaged in the horizontal direction in the lock box 1. It is guided to be movable.

  Further, a hook 5 is provided in the vicinity of the dead bolt 3 so as to be able to swing. The hook 5 is housed in a manner of being fitted into a U-shaped gap of the dead bolt 3 and has a slot formed in the hook. 14 and an engagement pin 13 provided on the dead bolt 3 side, and linked to the dead bolt 3.

  Then, as the deadbolt 3 moves forward, that is, as the deadbolt 3 moves to the left in FIG. 1, as shown in FIG. 2 and FIG. In this way, the Kama tablet is locked in the same manner as the conventional Kama tablet.

  Further, as shown in FIGS. 1 and 3, the dead cam 8 is rotated by the engagement of the driven notch 6 formed at the rear end portion of the dead bolt 3 and the operating arm 7 of the dead cam 8. The dead bolt 3 is driven in the front-rear direction as in the conventional kama lock.

  On the other hand, as shown in FIG. 2, the first spring-loaded support column 16 is disposed on the side plate of the lock box, and one end of a spring member 17 as a torsion coil spring wound around this is provided on the dead bolt 3 side. The first spring hook pin 18 is in elastic contact with the front.

  On the other hand, as shown in FIG. 3, an operating end 19 is formed at an angular position symmetrical to the operating arm 7 with respect to the rotational center of the dead cam 8, and a second spring hook pin 21 is planted on the operating end 19. It is installed.

  Further, the side plate of the lock box 1 is provided with a second spring hanging post 22, and the second spring hanging post 22 and the second spring hanging pin 21 are each considered to have a substantially U shape as a whole. The end of the spring 23 is wound around.

  As is apparent from FIGS. 1 to 3, the biasing direction of the elasticity of the thought spring 23 is switched back and forth at an angular position between the locking angle position and the unlocking angle position of the operation end 19.

  In the kama lock according to one embodiment of the present invention configured as described above, the elastic force of the spring member 17 and the thought spring 23 is superimposed and applied to the dead bolt at the dead bolt locking position.

  For this reason, as described above, the dead bolt is not seated at a halfway position as shown in FIG.

  Further, if the sum of the elasticity of the spring member 17 and the thought spring 23 is appropriately set, the dead bolt 3 and the hook 5 can be prevented from protruding even when the sliding door is closed with force.

In the partial cross-sectional side view of the kama tablet by one Example of this invention, a locked state is shown. In the partial cross section side view of the Kama tablet by one Example of this invention, the intermediate state which transfers to a unlocked state from a locked state is shown. In the partial cross section side view of the kama tablet by one Example of this invention, an unlocked state is shown. A partial cross-sectional side view of a conventional kama tablet shows a locked state. In the partial cross section side view of the conventional kama tablet, the intermediate state which transfers to a unlocked state from a locked state is shown. An unlocked state is shown in a partial cross-sectional side view of a conventional kama tablet.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Lock box 2 Front plate 3 Dead bolt 4 Support shaft 5 Cama 6 Driven notch 7 Actuating arm 8 Dead cam 17 Spring member 19 Operation end 23 Thought spring

Claims (1)

  A dead bolt having a driven notch that is guided to move in the front-rear direction perpendicular to the front plate in the lock box, and an operating arm that engages with the driven notch, an inner cylinder of the cylinder lock, and / or Or having a dead cam linked to the thumb turn and a hook linked to the dead bolt and swinging outward in conjunction with its advancement and locked to the inner surface of the opening edge of the strike hole. And a spring member for urging the dead bolt rearward, an operating end formed at an angular position symmetrical to the operating arm with respect to the center of rotation of the dead cam, and a spring hook implanted in the side plate of the lock box A kama lock, characterized in that a thought spring, in which a biasing direction is switched between a locking angle position and an unlocking angle position of an operation end, is mounted between a pin and a pin.

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