JP2008169590A - Fraudulent unlocking prevention mechanism - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a new fraudulent unlocking prevention mechanism which can close a hole, not having been completely closed, of a shake-out opening of a front plate, in such a type of locking mechanism that a locking lever is shaken out from or recedes into the front plate. <P>SOLUTION: A closing plate 26 is provided along an inside lateral surface of a locking lever 6; a base end of the closing plate 26 is rotatably supported on a closing plate shaft 27 parallel with a locking lever shaft; a leading end thereof is urged in the direction of getting close to an inside edge of the locking lever; a bent portion, which is bent in the direction of getting away from the locking lever, is formed at the leading end of the closing plate; a position of the bent portion is set to be engaged with an inside opening edge of the shake-out opening when the locking lever is shaken out; and an engaging step portion 29, which is engaged with the base end of the closing plate from the inside when the locking lever is put into a locked state by being completely shaken out from the shake-out opening, is formed on the inside lateral surface of the locking lever. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a mechanism for preventing unauthorized unlocking, and in particular, is not a type in which a lock lever is protruded and retracted from a front plate of a lock box, and the lock lever is moved to the front by a rotation shaft that penetrates the lock box in the thickness direction. The present invention relates to a mechanism for preventing unauthorized unlocking of a novel locking mechanism that swings out and retracts from a plate.

The present applicant has previously proposed a novel locking mechanism with Patent Document 1 described later.
This locking mechanism is rotatably supported at the center by a locking lever shaft extending in the thickness direction through the lock box, and swings from one end of the lock box to the strike hole. Put it in and lock it.
Japanese Patent Application No. 2006-353394

  The new locking mechanism of the type described above has a plate-shaped locking lever whose width is short compared to its length, so in the locked state where the locking lever is fully extended, a part of the above-mentioned swinging opening is locked. It is not completely closed by the lever and is in a so-called perforated state.

  For this reason, in the narrow door lock described in the above-mentioned Patent Document 1, it is very difficult to operate the internal mechanism through a wire or the like from the hole where the swing opening has not been closed, and to unlock it illegally. There is still room for improvement, such as not possible.

  In view of this, the present invention provides a novel unlocking / unlocking prevention mechanism capable of closing a hole that has not been closed in the swing-out opening of the front plate in a lock mechanism of a type in which the lock lever is swung out or retracted from the front plate. The purpose is to eliminate the above-mentioned disadvantages.

  In order to achieve the above object, the present invention has a locking lever that is rotatably supported at the center by a locking lever shaft extending in the thickness direction of the lock box. A lock plate is provided along the inner edge of the lock lever, and the base end of the lock lever is locked. With a closing plate shaft parallel to the lever shaft, it is rotatably supported in the vicinity of the side edge on the inner side of the locking lever, and its tip is biased in the direction close to the inner side surface of the locking lever, On the other hand, a bent portion that is bent in a direction away from the locking lever is formed at the tip of the closing plate, and the position of the bent portion is set to the inner opening edge of the above-mentioned swinging opening when the locking lever is swung out. Set to engage, while the locking lever swings out When it becomes locked state from the opening completely swung out is in, characterized in that the formation of the engaging step portion which engages the proximal end of the closure plate to the locking lever.

  In the invention according to claim 1 configured as described above, when the locking lever is swung out from the swing-out opening for locking, the bent portion at the tip of the closing plate is in the middle of the inner opening edge of the swing-out opening. Since only the locking lever is swung out from the lock box while leaving the lock plate in the form of closing the swinging opening and closing the opening, the swinging opening can be completely closed together with the locking lever. Therefore, it has the expected effect of eliminating illegal unlocking.

  A blocking plate is provided along the inner edge of the locking lever that is swung out from the swinging opening, and its tip is biased in the direction close to the locking lever, and at the time of locking, the bent part at the tip of the locking plate is swung out. The swinging opening is closed by hooking on the opening edge of the opening and automatically pulling it away from the locking lever. On the other hand, it automatically overlaps the locking lever when unlocked by the biasing force. .

An embodiment of the present invention will be described below with reference to the drawings.
The biasing / unlocking prevention mechanism of the present invention can be applied to all types of locking mechanisms in which the locking lever is swung out from the swing-out opening. However, in the following embodiments, it is described in Patent Document 1. The case where it is applied to a narrow door lock is shown.

  1 and 2, reference numeral 1 denotes a lock box of a narrow door lock, and this lock box 1 is attached to the lower end of an electric sliding door called an engine door, for example.

  First and second drive gears 2 and 3 each having a serpentine shape are rotatably guided in the lock box 1 and are connected to each other via an idle gear 4 disposed at the center thereof.

  One of the lock cylinder and the thumb turn cylinder or another lock cylinder is linked to the first drive gear 2 and the other is linked to the second drive gear 3 so that the first drive gear 2 rotates in conjunction with the key lock or thumb turn operation. It is configured.

  Since the manner of linkage between the cylinder lock or thumb turn of the narrow door lock and the driving gears 2 and 3 is well known, further detailed description is omitted here.

  1 and 2, reference numeral 5 denotes a thought spring, which gives the snap action to the operation of the key lock or thumb turn.

  1 and 2, reference numeral 6 denotes a locking lever. The locking lever 6 in the illustrated embodiment is a thick plate having a substantially rectangular shape, and the lock box 1 is moved in the thickness direction (FIGS. 1 and 2). The central portion is supported rotatably by a locking lever shaft 7 penetrating in the paper direction.

  In the unlocked state shown in FIG. 1, the entire lock lever 6 is completely retracted into the lock box 1. However, when the lock lever 6 starts to rotate slightly in the locking direction as shown in FIG. It is swung out from the swing-out opening 8 of the lock box, and engages in a strike hole (not shown) in the locked state shown in FIG.

  On the other hand, a slider 9 is guided at the upper right corner of the lock box 1 shown in FIG. 1 and FIG. 1 in such a manner that it partially overlaps with the other end of the lock lever so as to be movable in the horizontal direction (left and right in the figure). ing.

  A first engagement pin 11 implanted in a third drive gear 13 constituting the transmission mechanism 12 is slidably engaged in a first elongated engagement hole 11 opened at the left end of the slider 9 in the figure. Match.

  Since the third drive gear 13 is engaged with the second drive gear 3, the third drive gear 13 is also rotated by the operation of the key lock or thumb turn, and the slider 9 is driven in the horizontal direction.

  Further, a second engaging hole 14 having a substantially dharma shape is opened at the other end portion of the locking lever 6. One end of the second engaging hole 14 passes through the slider 9 in the thickness direction. A second engagement pin 17 that engages with a horizontal guide hole 16 (see FIG. 1) opened in the side plate of the lock box is loosely fitted.

  With the configuration described above, the second engagement pin 17 drives the locking lever as the slider 9 moves to the left, and the locking lever 6 starts to rotate counterclockwise (locking direction). 2 The slider 9 is guided by the engagement between the engagement pin 17 and the guide hole 16 so as to be movable in the horizontal direction.

  In FIG. 1, reference numeral 10 denotes a torsion coil spring, and this torsion coil spring 10 is coiled on a pin (numbering is omitted for clarity) in the other end of the locking lever 6. The one end is elastically contacted with the second engaging pin 17 and the other end is engaged with a groove (not shown) formed on the surface of the locking lever.

  The torsion coil spring 10 gives a snap action to the movement of the slider 9.

  On the other hand, in the illustrated embodiment, a sector gear 19 (see FIG. 2) is rotatably supported coaxially with the rotation shaft 18 of the third drive gear 13, and the sector gear 19 is formed on the slider 9. Is engaged with the rack 21 (see FIG. 2).

  The meshing between the sector gear 19 and the rack 21 constitutes a part of the guide mechanism of the slider 9.

  Furthermore, a portion of the sector gear 19 at a predetermined angular position extends in the radial direction to form a control lever 22.

  With the above configuration, when the slider 9 moves to the left, that is, in the locking direction, the sector gear 19 linked to the slider 9 via the rack 21 rotates counterclockwise, and the control lever 22 integrated with the sector gear 19 is provided. Also rotate counterclockwise.

  At this time, as shown in FIGS. 1 to 8, the tip of the control lever 22 rotates counterclockwise so as to give up the locking lever 6 that is swung out from the swinging opening 8.

  On the other hand, as shown in FIGS. 1 and 2, one end (the right end in the figure) is pivotally supported on the side of the lock box further to the right than the slider 9 at the upper right corner of the lock box, and A lock lever 23 whose free end is urged clockwise is disposed.

  As shown in FIG. 4, the front end (free end) of the lock lever 23 is an impact step portion 24 (see FIG. 2) formed at the other end of the lock lever 6 that is swung out to the locking angle position. Engage with and stop this.

  In other words, an external force that attempts to rotate the locking lever 6 in the unlocking direction (clockwise) acts in the length direction of the lock lever 23 and is carried by the rotating shaft.

Further, as shown in FIG. 2, a release lever 25 is provided.
The release lever 25 in the illustrated embodiment has a generally rectangular shape as a whole, and is supported on the other end portion of the locking lever 6 so that the convex portion faces outward and the central portion is pivotable.

  The size and shape of the release lever 25 is such that the tip of the control lever 22 is positioned at an angular position before the locking-completed angular position of the control lever 22 as shown in FIG. 4 or at an initial angular position of rotation in the unlocking direction. In other words, the other end jumps counterclockwise so that the engagement between the tip of the lock lever 23 and the stop step 24 of the lock lever can be released. Is set to

  As a result, at the initial stage of rotating the key lock or thumb turn in the unlocking direction, the lock lever 23 is unlocked by the lock lever 23, and the unlocking operation can be started smoothly.

  The drive mechanism of the above-described locking lever is an objective configuration of the unauthorized unlocking prevention mechanism according to the present invention. Next, the unauthorized unlocking prevention mechanism that is the gist of the present invention will be described.

  2 and 3, reference numeral 26 denotes a closing plate, which is a plate-like body having a width substantially the same as the width of the swing opening 8 and extends along the inner edge of the locking lever 8. At the same time, the base end portion is pivotally supported in the vicinity of the inner end edge portion of the locking lever 8 by a closing plate shaft 27 parallel to the locking lever shaft 7.

  Further, the closing plate 26 is urged in the direction in which the tip thereof is close to the inner side surface of the locking lever by the elasticity of the closing plate spring 28 as a torsion coil spring wound around the closing plate shaft 27.

  In the illustrated embodiment, one end of the closing plate spring 28 is fitted in a spring groove (not shown) formed on one surface of the locking lever 6, and the other end is hooked on the base end portion of the closing plate ( Not shown).

  On the other hand, a bent portion (not numbered for the sake of clarity) is formed at the tip of the closing plate 26, which is bent in a direction away from the locking lever 6.

  The position of the bent portion is set so as to engage with the inner opening edge of the swing opening 8 when the locking lever 6 is swinged (see FIG. 2).

  On the other hand, as shown in FIG. 3, when the locking lever 6 is completely swung out from the swing opening at the inner edge of the locking lever 6 (see FIG. 4), the base end of the closing plate An engagement step portion 29 is formed to be engaged with the inside from the inside.

  As for the locking mechanism of the narrow door lock and the unauthorized unlocking prevention mechanism configured as described above, the change of the state from FIG. 1 to FIG. 4 explains the locking, and conversely from FIG. 4 to FIG. The change explains unlocking.

  In the process of these changes, the unauthorized unlocking prevention mechanism according to the present invention configured as described above has a closing plate 26 when the locking lever 6 is swung out from the swinging opening for locking as shown in FIG. Only the locking lever 6 is swung out in such a manner that the bent portion at the tip of the engaging portion engages with the opening edge inside the swinging opening, and the closing plate is left in the swinging opening 8 together with the locking lever. In the locked state as shown in FIG. 4, the base end of the closing plate 26 engages with the engagement step portion 29 from the outside.

  Therefore, in the locked state, as shown in FIG. 4, the closing plate 26 together with the locking lever 6 completely closes the swing opening 8, thereby preventing the tool for unauthorized unlocking into the lock box.

  On the other hand, if the closing plate 26 is forcibly pushed into the lock box, the external force is stopped by the engagement between the base end portion of the closing plate and the engagement step portion 29.

  In the illustrated embodiment, as shown in FIG. 4, a locking piece 31 is integrally coupled to the base end portion of the closing plate 26 so that the overall shape is substantially U-shaped, while the locking lever 6 is formed with a concave portion 32 having a substantially fan-like shape as a whole, and the locking piece 31 is engaged with the concave portion 32.

  In the locked state shown in FIG. 4, the locking piece 31 engages with another engagement step portion 29 that is the inner surface of the recessed portion 32.

  That is, the engagement step portion 29 in the present invention refers to one or both of the one formed on the inner edge of the locking lever 6 and the inner surface of the recessed portion 32.

  Contrary to the illustrated embodiment, the third drive gear 13 may be provided with an engagement hole (not shown) along the radius and an engagement pin on the slider (see FIGS. 1 and 2). .

  Further, as to the driving mechanism of the locking lever, contrary to the illustrated embodiment, an engaging pin may be provided on the locking lever 6 and an engaging hole may be provided on the slider.

  Furthermore, the overall mechanism is not limited to the narrow door lock as shown in the illustrated embodiment in the future, but a system for systematically managing the lock by a computer is conceivable. In this case, for example, the lock lever is a geared motor, The unauthorized unlocking prevention mechanism according to the present invention can also be applied to a system in which the control lever is controlled by a solenoid.

The side view of the narrow door lock having the unauthorized unlocking prevention mechanism according to one embodiment of the present invention is shown in a side view, showing the unlocked state. FIG. 2 is a side view showing a narrow door lock having a fraud prevention mechanism according to an embodiment of the present invention with a side plate removed, showing a state where the locking lever is slightly swung and locking is started. FIG. 5 is a side view showing the narrow door lock having the unauthorized unlocking prevention mechanism according to an embodiment of the present invention, with the side plate removed and showing a state where the locking lever is further swung out from FIG. 2. FIG. 3 is a side view showing the narrow door lock having the unauthorized unlocking prevention mechanism according to one embodiment of the present invention, with the locking lever being almost completely swung out.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Lock box 2 1st drive gear 3 2nd drive gear 4 Idle gear 6 Lock lever 7 Lock lever shaft 8 Swing opening 9 Slider 11 1st engagement hole 12 Transmission mechanism 13 3rd drive gear 14 1st engagement pin DESCRIPTION OF SYMBOLS 15 2nd engagement hole 16 Guide hole 17 2nd engagement pin 18 Rotating shaft 19 Sector gear 21 Rack 22 Control lever 23 Lock lever 24 Stopping step part 25 Release lever 26 Closure plate 27 Blocking plate shaft 28 Blocking leaf spring 29 Engagement step 31 Locking piece 32 Recessed part

Claims (1)

  It has a lock lever that is pivotally supported in the center by a lock lever shaft that penetrates the lock box in the thickness direction, and from the swing opening that opens on the front plate of the lock box when locked In order to swing out the tip of the lock and engage it with the strike hole, a blocking plate is provided along the inner edge of the locking lever, and its base end is locked by a blocking plate shaft parallel to the locking lever shaft. The lever is rotatably supported near the inner edge of the lever, and its tip is urged in the direction close to the inner side of the locking lever, while the tip of the closing plate is separated from the locking lever. A bent portion is formed, and the position of the bent portion is set to engage with the inner opening edge of the swing opening when the lock lever is swung, while the lock lever is Fully swung out from the swing opening and locked When, incorrect unlocking prevention mechanism the engaging step portion which engages the proximal end of the closure plate, characterized in that formed on the locking lever.

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