JP2009161957A - Locking device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a locking device which allows emergency unlocking by turning a locking lever for restricting a latch to a locking state, wherein the locking device comprises a simplified mechanism for turning the locking lever upon turning of a cylinder lock. <P>SOLUTION: According to the structure of the locking device, a cam plate 15 is mounted on a plunger 4a of the cylinder lock 4, and a turnable arm 16 is turnably mounted on a spindle 11C. Then a sliding portion 15a at a lower edge of the cam plate 15 is abutted on a cam receiving plate 16b of the turnable arm 16, and an abutting portion 16a at a lower edge of the turnable arm 16 is abutted on a driven projection 12a of the locking lever 12. Further the cam plate 15 is turned by the cylinder lock 4, and the turnable arm 16 is turned counterclockwise by pressing the cam receiving plate 16b, followed by pressing the driven projection 12a by the abutting portion 16a, to thereby unlock the locking device. In an initial turnable range of the cylinder lock 4 (cam plate 15), a stopper portion 15b of the cam plate 15 is opposed to a stopper abutting portion 16c of the turnable arm 16, and therefore turning of the turnable arm 16 is restricted. Herein the cam plate 15 and the turnable arm 16 are formed of pressed members. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a locking device that is electrically locked and unlocked by a solenoid, and more particularly, to a locking device that can be emergency unlocked by rotating a cylinder lock with a key.

  Conventionally, as this type of locking device, for example, there is one disclosed in Japanese Patent No. 3443212 (Patent Document 1). In this conventional locking device, a cylinder lock is provided on the front surface of the lock case, and a latch is rotatably provided in the lock case. The latch is configured to lock and unlock the engagement rod provided on the door at the locking angle and the unlocking angle. The lock case is provided with a rotatable locking lever and a drive lever, and the drive lever is rotated by a solenoid. The locking lever has a locking step, and the latch has an engaging end that engages with the locking step. The locking lever rotates together with the drive lever by rotating the drive lever with a solenoid, and engages the locking step with the engagement step of the latch when the latch is at the locking angle. By doing so, the locking device enters a locked state (locked state).

For emergency unlocking, the cylinder lock is rotated with the key, the columnar cam attached to the cylinder lock is rotated to move the slider, and the locking lever is moved by the drive protrusion at the tip of the slider. The latch is rotated by removing the locking step from the engagement end of the latch.
Japanese Patent No. 3443212

  However, in the conventional locking device, the mechanism for rotating the locking lever at the time of emergency unlocking is composed of a cylindrical cam and a slider that advances and retreats following this cam, and the cam and slider are processed. However, there is a problem that it is expensive.

  An object of the present invention is to enable a locking lever to be rotated with a simple structure in a locking device that rotates a cylinder lock with a key to release an engagement state between a locking lever and a latch and performs emergency unlocking. And

  The locking device according to claim 1 is a cylinder lock provided on the front surface of the lock case, and is rotatably provided in the lock case to lock and release the engagement rod of the door at the locking angle and the unlocking angle. A latch, a lock lever provided rotatably in the lock case, and engaging the lock step with the engagement step of the latch when the latch is at a lock angle; and the lock lever in the lock case; And a drive lever that is driven by a solenoid to rotate the locking lever, and the locking lever is biased by a spring in a direction to engage the latch. When the emergency unlocking is performed from the locked state in which the locking lever is engaged with the latch, the key inserted in the key hole of the cylinder lock is rotated so that the locking lever is attached to the spring. Against power In the locking device which is rotated so that the locking end portion of the locking lever is separated from the engagement step portion of the latch so that the engagement rod of the door can be released from the latch. A cam plate which is attached to the rotor and rotates together with the rotor; and a rotation arm which is provided so as to be rotatable around an axis orthogonal to the rotation axis of the rotor, the rotation arm including the locking lever And a cam receiving plate that extends in a direction away from the rotating shaft of the rotating arm and forms a plane parallel to the rotating shaft. And a stopper abutting portion provided on the opposite side of the abutting portion across the rotation axis of the rotating arm, and the cam plate is a rotating arm of the cam plate. A sliding contact portion for slidingly contacting the cam receiving plate during movement and pushing the cam receiving plate; and the cam plate A cam plate provided on the opposite side of the sliding contact portion across the rotation shaft and integrally formed with a stopper portion facing the stopper contact portion, and the rotation of the cylinder by the rotation of the key In a predetermined initial rotation range from the start position, the sliding contact portion of the cam plate is separated from the cam receiving plate, and the stopper portion is opposed to the stopper contact portion of the rotation arm. When the initial rotation range is exceeded, the sliding contact portion of the cam plate pushes the cam receiving plate, and the stopper portion is disengaged from the stopper contact portion of the rotation arm, and the rotation The contact portion of the moving plate is in contact with the locking lever, and the locking lever is rotated against the urging force of the spring to release the engagement rod by the latch. Features.

  2. The locking device according to claim 1, wherein when the cylinder lock is rotated, the cam plate attached to the rotor rotates, and the sliding contact portion of the cam plate pushes the cam receiving plate of the rotating arm to rotate the rotating arm. Rotate. And the contact part of a rotation arm contacts the locking step part side of a locking lever, this locking lever is rotated, and a locking device is unlocked. At this time, in the predetermined initial rotation range from the rotation start position of the cylinder lock, the sliding contact portion of the cam plate is separated from the cam receiving plate, and the stopper portion is in contact with the stopper contact portion of the rotation arm. Since they face each other, the locking arm does not rotate in this initial rotation range. When the initial rotation range is exceeded, the locking arm is rotated.

  According to the lock device of the first aspect, the mechanism for rotating the locking lever is constituted by the cam plate and the rotation arm, and the cam plate includes the stopper protruding to the rotation arm side, and the rotation arm. Has a configuration including a cam receiving plate, a contact portion and a stopper contact portion. Therefore, the cam plate and the rotating arm can be configured as, for example, a pressed part of sheet metal, so that a simple structure can be achieved.

  Next, specific examples of embodiments of the present invention will be described with reference to the drawings. 1A is a side view of the locking device of the embodiment, FIG. 1B is a top view of the locking device, FIG. 2A is a side view of a locking portion showing a locking state of the locking device, FIG. (B) is a side view of the locking part showing an emergency unlocking state of the locking device. In addition, although the locking device of this embodiment is used for a rental locker device, it can be applied to other devices.

  In this lock device, a lock case is constituted by a metal substrate 1, a central case 2 molded from a synthetic resin material, and a metal support plate 3. The support shafts 11A and 11B are fixed to the substrate 1 and the central case 2, and a locking lever 12 and a drive lever 13 are pivotally attached to the support shaft 11A so as to be rotatable coaxially. A latch 14 is pivotally attached to the support shaft 11B. On the side surfaces of the substrate 1 and the central case 2, there are formed recesses 1a, 2a that do not hinder insertion of a U-shaped engagement rod R (see FIG. 2) provided on a rocker door (not shown).

  A solenoid 4 is attached to the rear part of the substrate 1, and a pin 4b is provided at the tip of the plunger 4a of the solenoid 4. The pin 4b is engaged with an engagement notch 13a of the drive lever 13, and the plunger 4a and the drive lever One end of 13 is connected. Thus, when the solenoid 4 is driven, the drive lever 13 is rotated about the support shaft 11A.

  The locking lever 12 has a lower end pivotally attached to the support shaft 11A. The locking lever 12 includes a driven wall 12a (see FIG. 2) standing upright from the left side surface, and a driven projection 12b standing up bent from the upper end. And a locking step 12c is formed at the upper end of the driven wall 12a. Further, one end 5 a of the spring 5 wound around the support shaft 11 </ b> A is locked to the drive lever 13, and the other end 5 b is locked to the locking lever 12. Therefore, the locking lever 12 is urged counterclockwise in FIGS. 2 and 1 with respect to the drive lever 13 with the support shaft 11A as a fulcrum. As shown in FIG. 2, the drive lever 13 has a drive protrusion 13 b on a part opposite to the engagement notch 13 a, and the drive protrusion 13 b can come into contact with the driven wall 12 a of the locking lever 12. ing.

  The latch 14 has an engagement notch 14a that opens to the outer peripheral surface, and an engagement step portion 14b that is formed on the outer peripheral surface. One end 6 a of the spring 6 is locked in the small hole 14 c of the latch 14, and the other end 6 b of the spring 6 is locked in the small hole 1 b provided in the substrate 1. Accordingly, the latch 14 is biased to the locking position shown in FIG. 2A and the unlocking position shown in FIG. 2B, and the opening of the engagement notch 14a is stabilized at the angle at which the recesses 1a and 2a are positioned.

  As shown in FIG. 1, the support plate 3 is provided with a cylinder lock fixing wall 31 that is bent at a right angle from the left end in FIG. 1, and the cylinder lock 7 and the display lamp 10 are placed on the cylinder lock fixing wall 31. A built-in cylinder lock case 20 is fixed, and a cam plate 15 is attached to the rotor 7 a of the cylinder lock 7. Thereby, the cam plate 15 rotates together with the rotor 7a. The lower end of the cam plate 15 is a slidable contact portion 15a, and the upper end of the cam plate 15, that is, the side opposite to the slidable contact portion 15a across the rotation shaft (axis of the rotor 7a) is parallel to the rotation shaft. It has a stopper portion 15b that extends. These parts and the cam plate 15 are integrally formed by pressing a sheet metal.

  A fixed seat 21 is fixed to the upper part of the substrate 1. A support shaft 11C is fixed to the fixed seat 21 on the rear extension of the rotation shaft of the rotor 7a of the cylinder lock 7. The support shaft 11c is a rotation shaft of the rotor 7 (that is, the rotation of the cam plate 15). The rotation arm 16 is pivotally attached to the support shaft 11C. Further, one end of the spring 8 wound around the support shaft 11C is locked to the projecting piece 21a of the t seat 21, and the other end (not shown) is locked to the rotating arm 16, and the rotating arm 16 is supported. The shaft 11C is urged in the clockwise direction in FIG.

  The rotating arm 16 includes a contact portion 16a provided so as to be able to contact the driven projection 12b of the locking lever 12, and a cam receiving plate 16b extending in a direction away from the support shaft 11C (rotating shaft). And a stopper contact portion 16b provided on the opposite side of the contact portion 16a across the support shaft 11C. These parts and the rotating arm 16 are integrally formed by pressing a sheet metal. Note that the fact that the abutting portion 16a can abut on the driven projection 12b means that the abutting portion 16a can abut on the locking step portion 12c side of the locking lever 12.

  FIG. 3 is a diagram for explaining the operation of the cam plate and the rotating arm, and the operation of the lock device of the embodiment will be described with reference to FIGS. In the normal state where the emergency unlocking operation is not performed, the cylinder lock 7 is locked and the rotor 7a is at the locking angle, and the cam plate 15 is in the position shown in FIG. 2 (A1), FIG. 2 (A2) and FIG. is there. The slider 53 is at the left moving end in FIG. 3, and the driving protrusion 56 of the slider 53 is separated from the driven protrusion 34 of the locking lever 32.

  When the locking device is locked, the plunger 4a of the solenoid 4 moves to the immersive side, the drive lever 13 rotates counterclockwise about the support shaft 11A, and the lock lever 12 The locking step portion 12 c is engaged with the engagement step portion 14 b of the latch 14 in a state of being in contact with the drive protrusion 13 b. Therefore, the latch 4 is restrained by the locking angle in a state in which the latch 4 cannot rotate while the engagement rod R is engaged in the engagement notch 14a. (See Figure 2 (A)).

  When unlocked from the locked state by the control of the control unit or the like, the plunger 4a of the solenoid 4 moves in the protruding direction, and the drive lever 13 rotates clockwise about the support shaft 11A as shown in FIG. ) Is the position indicated by the dashed line. By the rotation of the drive lever 13, the drive protrusion 13b of the drive lever 13 pushes the driven wall 12a of the lock lever 12, and the lock lever 12 rotates in the clockwise direction, so that the lock step 12c and the latch 14 The engagement with the engagement step portion 14b is released (see FIG. 2B). When the latch 14 released from the engagement can be turned and a person manually opens the door, the latch 14 is rotated clockwise around the support shaft 11B by the urging force of the spring 6, and the engagement notch The engagement rod R is removed from 14a, and the door can be opened.

  Next, when the unlocking becomes impossible due to a power failure or some failure of the electric system, a key owned by an administrator or the like is inserted into the cylinder lock 7 and emergency unlocking is performed. When the cylinder lock 7 is rotated, the cam plate 15 moves from the position shown in FIGS. 3 (A1) and 3 (A2) to the position shown in FIGS. 3 (B1) and 3 (B2). And it rotates to the position of FIG. 3 (C2). The rotation range from the position shown in FIGS. 3A1 and 3A2 to the position shown in FIGS. 3B1 and 3B2 is an “initial rotation range”.

  In this initial rotation range, the sliding contact portion 15 a of the cam plate 15 is in a state of being separated from the cam receiving plate 16 b of the rotation arm 16. Further, the stopper portion 15b of the cam plate 15 faces the stopper contact portion 16c of the rotating arm 16 (see FIG. 3 (A2)). At the end of this initial rotation range, as shown in FIGS. 3 (B1) and 3 (B2), the sliding contact portion 15a of the cam plate 15 contacts the cam receiving plate 16b of the rotation arm 16, and The stopper part 15b comes off the position of the stopper contact part 16c. Thereafter, the sliding portion 15a pushes the cam receiving plate 16b, and the rotating arm 16 rotates about the support shaft 11C as shown in FIG. 3 (C1). 16a pushes the driven projection 12b while contacting the driven projection 12b of the locking lever 12, and the locking lever 12 rotates to the position shown in FIG. Accordingly, the latch 14 can be rotated in the same manner as when unlocked by the solenoid 4, and the locking device is unlocked (emergency unlocked).

  Since the stopper portion 15b of the cam plate 15 faces the stopper contact portion 16c of the rotating arm 16 within the initial rotation range, the rotating arm 16 does not rotate in the locked state. The locked state can be reliably maintained.

It is the side view and top view of a locking device of an embodiment of the present invention. It is a side view of the locking part which shows the locking state and emergency unlocking state of the locking device of embodiment. It is a figure explaining the effect | action of the cam board and rotation arm in the locking device of embodiment.

Explanation of symbols

4 Solenoid 7 Cylinder lock 12 Locking lever 13 Drive lever 14 Latch 15 Cam plate 15a Sliding contact portion 15b Stopper portion 16 Rotating arm 16a Contact portion 16b Cam receiving plate 16c Stopper contact portion

Claims (1)

A cylinder lock provided on the front surface of the lock case, a latch that is rotatably provided in the lock case and locks and unlocks the engagement rod of the door at the locking angle and the unlocking angle, and rotates in the lock case. A locking lever that engages the locking step with the engaging step of the latch when the latch is at a locking angle, and is provided rotatably in the lock case coaxially with the locking lever. A driving lever that is driven by a solenoid to rotate the locking lever, and the locking lever is urged by a spring in a direction to engage the latch with respect to the driving lever, and the locking lever is applied to the latch. When emergency unlocking is performed from the engaged locked state, the key inserted into the key hole of the cylinder lock is rotated, so that the locking lever is rotated against the urging force of the spring. The lock Spaced apart the locking end portion of the over from the engaging step portion of said latch, in the lock device in which the engaging rod of the door to allow unlocking from the latch,
A cam plate that is attached to the rotor of the cylinder lock and that rotates together with the rotor, and a rotation arm that is rotatably provided around an axis orthogonal to the rotation axis of the rotor;
The pivot arm extends in a direction away from the pivot shaft of the pivot arm and a contact portion provided to be able to abut on the locking step portion side of the locking lever. A rotating arm in which a cam receiving plate that forms a plane parallel to the rotating arm and a stopper abutting portion provided on the opposite side of the abutting portion across the rotation axis of the rotating arm are integrally formed,
The cam plate is in sliding contact with the cam receiving plate when the cam plate is rotated to push the cam receiving plate, and on the opposite side of the sliding contact portion with the rotating shaft of the cam plate interposed therebetween. Is a cam plate formed integrally with a stopper portion facing the stopper contact portion,
The sliding contact portion of the cam plate is separated from the cam receiving plate in the predetermined initial rotation range from the rotation start position of the cylinder by the rotation of the key, and the stopper portion is rotated. It is in a state facing the stopper contact portion of the arm,
When the initial rotation range is exceeded, the sliding contact portion of the cam plate pushes the cam receiving plate, and the stopper portion is disengaged from the stopper contact portion of the rotation arm, and the rotation plate The abutment portion abuts on the locking lever, and the locking lever is rotated against the urging force of the spring to release the engagement rod by the latch. Locking device.

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