JP3405785B2 - Safe door lock - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lock for opening and closing a safe door having a bar member and a mechanism for locking the bar member. 2. Description of the Related Art Conventionally, as disclosed in Japanese Patent Application Laid-Open No. 4-353180, for example, a bar member which can move linearly between a locking position and an unlocking position, and 2. Description of the Related Art A safe door opening / closing lock device including a mechanism for moving a bar member and a lock mechanism for switching between a locked state and an unlocked state for preventing movement of the bar member to an unlocked position is known. . In the device disclosed in the above publication, the lock mechanism has a lock member that is interlocked with the bar member during normal operation, and a plunger that is driven by a solenoid and is disengaged from the lock member. Drive member. When the plunger is engaged with the lock member in a state where the bar member is in the lock position, the lock member is prevented from moving and enters the locked state. In addition, when the solenoid is driven by input of a recitation number or the like by a keyboard, the plunger is released from the lock member, whereby the movement of the lock member is allowed and the lock member is unlocked. The bar member can be moved to the unlock position. In the device disclosed in the above publication, the plunger of the lock driving member is disposed so as to be vertically movable, and is urged upward by a spring (urging means). Then, the urging force engages with the lock member in a state of projecting upward, and when the solenoid is energized, the plunger is retracted downward. However, according to the arrangement of the plunger, since the weight of the plunger is added in the plunger retreating direction, the plunger normally protrudes to maintain the locked state in which the plunger is engaged with the locking member. It is necessary to use a high-strength spring for biasing
It is necessary to increase the strength of the portion supporting the spring, which tends to increase the size and cost of the lock driving member. Further, when the spring force of the spring decreases due to a change with time, the plunger may unexpectedly enter and the lock may be uncertain. [0006] In view of the above circumstances, the present invention can satisfy the functionality of the locking driving member and enhance the reliability even if the urging force on the plunger is relatively small. Another object of the present invention is to provide a safe door opening / closing lock device that can secure a lock function even when the safe is overturned. In order to achieve the above object, the present invention provides a bar member which can be linearly moved between a locked position and an unlocked position on a safe door, and And a lock member that can be switched between a locked state and an unlocked state in which the bar member is prevented from moving to the unlocking position in accordance with the driving of the locking driving member. In the provided safe opening / closing lock device for a safe, the lock driving member has a plunger which is actuated by a solenoid to engage and disengage with the lock member, and the plunger is arranged in a substantially horizontal direction. On the other hand, a stopper engaging portion is provided on the lock member, and a stopper member corresponding to the stopper engaging portion rotates on the door via a horizontal axis perpendicular to the plunger. When the safe is in a normal state, the stopper member is detached from the stopper engaging portion, and the plunger is oriented vertically. When the safe is overturned, it is arranged to engage with the stopper engaging portion. According to the above construction, since the plunger is disposed substantially horizontally, the weight of the plunger does not increase in the plunger retraction direction, and the plunger is engaged with the lock member. Even if the urging force of the spring or the like for making the spring relatively small is used, the plunger does not accidentally come off the lock member. Also, when the urging force is reduced as described above, there is a concern that the plunger may unexpectedly come off the lock member when the safe falls down in a state where the plunger is oriented vertically. The locked state is ensured by the stopper member automatically engaging with the stopper engaging portion. An embodiment of the present invention will be described with reference to the drawings.
FIG. 1 shows a schematic view of the entire safe in which the device of the present invention is incorporated. A door 2 is attached to the front opening of the safe main body 1 so as to be openable and closable. An operating section 4 for operating a bar member is provided. The operation unit 4 is provided with a handle 5 that is rotatable within a certain rotation angle (approximately 90 °) for an unlocking operation in a normal state, and when the user forgets the recitation number, A cylinder lock 6 into which an emergency key (not shown) is inserted for an emergency unlocking operation in the event of an electrical system failure or the like. 2 to 4 show a specific structure of a door opening / closing lock device according to an embodiment of the present invention. In these figures,
In the frame 2a on the back side of the door 2, a bar member 10, a lock member 12, and a rotating member 1 for linking the bar member 10 and the lock member 12 with the bar member operating operation section 4 are provided.
4, a lock driving member 20, and a stopper member 25 are assembled. The bar member 10 is formed of a plate such as a metal plate, and is disposed in the frame portion 2a.
0a is inserted into the notch hole 11 on one side of the door 2, one end 10a protrudes to one side of the door 2 and engages with an engaging portion (not shown) of the safe main body and the locking position. It is supported by a support (not shown) so that it can move linearly in the left-right direction over the unlocked position where it is released from the joint. The lock member 12 is made of a plate such as a metal plate and has a vertical wall 12a and a horizontal wall 12b bent forward from the upper end thereof.
It is supported by a support (not shown) so as to be able to move linearly in the left-right direction while being positioned behind and partially overlapping with 0. The rotating member 14 is located in front of the bar member 10, and has a radially outwardly protruding portion 1 on a part of the disk.
4a. The central portion of the rotating member 14 is connected to a rotating shaft 15, which is rotated by operating the handle 5 of the operating member 4 for operating the bar member or operating the cylinder lock 6 with an emergency key. It has become so. A pin 16 projecting rearward is connected to the projecting portion 14a of the rotating member 14, and the pin 16 and the vertical wall 1 of the locking member 12 are
2a are provided with pin engagement holes 17 and 18, respectively, and the pin 16 is inserted through both pin engagement holes 17 and 18. The pin engaging hole 17 of the bar member 10 is a long hole of a vertically long linear lock. In addition, the lock member 12
The upper half portion of the pin engaging hole 18 has a vertically long linear shape, and the lower half portion has an arc shape having a position corresponding to the rotation center of the rotating member 14 as a center of curvature. And
At the time of locking, as shown in FIG. 2, the protruding portion 14a of the rotating member 14 is directed to the side (left side in FIG. 2).
The pin 16 is located at an intermediate portion between the engagement holes 17 and 18, and when unlocking by operating the handle 5, the rotating member 1
The rotation range of the rotation member 14 by the handle 5 is set so that the rotation of the rotation member 4 in the counterclockwise direction (arrow a) in FIG. 2 causes the protruding portion 14a to face upward. In addition,
When the emergency key is inserted into the cylinder lock 6 and operated, the rotating member 14 can be rotated clockwise (arrow b) from the state shown in FIG. It has become. The side of the bar member 10 (the left side in FIG. 2).
In front of the lock member 12 at
0 is arranged. The lock driving member 20 has a plunger 22 which is actuated by a solenoid 21 and is engaged with and disengaged from the lock member 12. That is, the plunger 22 is provided in the solenoid 21 so as to be able to protrude and retract, and the plunger 22 is urged in the protruding direction by a spring (not shown). The plunger 22 is arranged substantially horizontally. Specifically, the solenoid 21 is attached to the frame 2a in such a state that the plunger 22 is movable in the front-back direction. On the other hand, a plunger engagement hole 23 is provided in the vertical wall 12 a of the lock member 12. When the power supply to the solenoid 21 is stopped in a state where the lock member 12 is at a predetermined position (the position where the engagement hole 23 corresponds to the plunger 22), the plunger 22 is biased by a spring. When the solenoid 21 is energized, the plunger 22 is retracted and disengaged from the engagement hole 23 by projecting and engaging the plunger engagement hole 23 to prevent the lock member 12 from moving. The lock member 12 is configured to be in an unlocked state that allows the movement of the lock member 12. The solenoid 21 is energized when a recitation number or the like is input from the keyboard 3. A notch-shaped stopper engaging portion 24 is provided on the horizontal wall 12b at the upper end of the lock member 12, and a stopper member 25 is disposed below the notch-shaped stopper engaging portion 24. The stopper member 25 is formed in a substantially semicircular plate shape, and is provided with a bracket 2 provided on the frame 2a of the door 2.
6 is rotatably mounted via a horizontal shaft 27 so as to be suspended from the horizontal shaft 27 by its own weight. When the safe is in the normal state, the stopper member 25 is located below the horizontal wall 12b of the lock member 12 and is disengaged from the stopper engaging portion 24 as shown in FIG. As shown in FIG. 8, the stopper engages with the stopper engaging portion 24 when the safe is turned over as shown in FIG. That is, when the stopper member 25 is relatively displaced relative to the safe in the rotation direction about the horizontal axis, if the rotation angle exceeds, for example, about 60 °, the stopper member 25 and the stopper engagement portion 24 are engaged. The positional relationship between the two is set so as to ensure engagement at least at a rotation angle of 90 °. The operation of the apparatus of this embodiment will be described below. In the locked state, as described above,
When the pin 16 of the rotating member 14 is located on the side of the rotating shaft 15, the pin engaging hole 17 of the
18, the bar member 10 is in a locked position protruding to the side of the door 2, and the lock member 12 is locked by a plunger 22 of a lock drive member 20 (FIG. 2). In this state, the bar operating member 4
When the handle 5 is operated to rotate the rotary member 14 in the counterclockwise direction in this figure, since the movement of the lock member 12 is prevented, the rotation of the rotary member 14 and the release of the bar member 10 are prevented. Movement to the locking position is prevented, and the locked state is maintained. As a normal unlocking operation from this state,
First, by inputting the recitation number by operating the keyboard 3, the solenoid 21 of the lock driving member 20 is energized, the plunger 22 is retracted and disengaged from the plunger engaging hole 23, and the lock member 12 is unlocked. Become. Then, the handle 5 is operated to rotate the rotating member 14.
Is rotated in the counterclockwise direction (arrow a) in FIG. 2 so that the pin 16 of the rotating member 14
The lock member 12 and the bar member 10 move upward while being engaged with the pin engagement holes 17 and 18 of the lock member 12 and the lock member 12. Then, as shown in FIGS. 5 and 6, when the protruding portion 14a of the rotating member 14 reaches a state in which it faces upward, the bar member 10 moves to the unlocking position, and the door 2 can be opened. In an emergency unlocking operation in the event of forgetting the recitation number or failure of the electric system, an emergency key is used, and the emergency key is used for the cylinder lock 6 of the bar member operating operation unit 4.
2 and rotated in a direction opposite to the direction of unlocking by the handle 5, thereby rotating the rotating member 14 in the clockwise direction (arrow b) in FIG. In this case, the lower half side of the pin engagement hole 18 of the lock member 12 is formed in an arc shape, and the arc portion and the moving direction of the pin 16 of the rotating member 14 match. For this reason, as shown in FIG. 7, the pin 16 is
On the other hand, since the engagement hole 17 of the bar member 10 is also formed linearly on the lower half side, the bar member 10 moves to the unlocking position with the movement of the pin 16. Therefore, in this case, the lock can be released even if the lock member 12 is not in the unlocked state. Incidentally, the lock driving member 20 is
By arranging the plunger 22 in the horizontal direction, even if the urging force of the spring for urging the plunger 22 in the protruding direction is relatively small, this state is reliably maintained in the locked state. You. That is,
In the conventional device shown in the above-mentioned publication, the weight of the plunger acts in the immersion direction.
Since the weight is not added in the immersion direction when the two are arranged in the horizontal direction, the plunger 22 does not unexpectedly enter even if the urging force is relatively small.
The state of engagement with the plunger engagement hole 24 of the lock member 12 is ensured. When the urging force on the plunger 22 is reduced as described above, the safe is turned over by 90 ° from the normal state as shown in FIG.
When the plunger faces up and down, plunger 2
Although there is a concern that the locking member 2 may be unexpectedly immersed, the locking state in this case is ensured by providing the above-described stopper member 25 separately from the locking driving member 20. That is, when the safe is overturned as shown in FIG. 8, the stopper member 25 is always moved by the horizontal axis 2 under its own weight.
7, it is rotated by 90 ° relative to the safe, and the relative displacement causes the stopper member 25 to automatically engage with the stopper engaging portion 24 of the lock member 12. For this reason, the lock driving member 2
Even if the plunger 22 is retracted, the stopper member 25 prevents the lock member 12 from moving,
The locked state is surely maintained. In the above embodiment, the handle 5 is provided in the bar operating member 4 for normal unlocking operation. However, as shown in the above publication, the normal key is used for the normal operation. An unlocking operation may be performed. The structure of the other parts may be changed in design without departing from the spirit of the present invention. As described above, according to the present invention, in a safe door opening / closing lock device in which a bar member is provided with a bar member, a bar member operating operation section, a lock member and a lock drive member, The locking drive member has a plunger that is actuated by a solenoid and engages and disengages from the lock member. Since the plunger is disposed in a substantially horizontal direction, power is supplied to the solenoid. Even if the urging force of the spring or the like for urging the plunger to maintain the locked state when not in use is relatively small, the plunger does not accidentally come off the lock member and the locked state is maintained. Can be reliably maintained. Therefore, it is possible to reduce the size and cost of the lock driving member, and it is possible to enhance the functionality and reliability. Further, a stopper engaging portion is provided on the lock member, and a stopper member corresponding to the stopper engaging portion is rotatably supported on the door via a horizontal axis in a direction orthogonal to the plunger. Since the stopper member is configured to automatically engage with the stopper engaging portion when the safe is overturned in a state where the plunger is oriented vertically, when the safe is overturned as described above. Thus, the locked state can be reliably maintained, and the security can be enhanced.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic front view showing an example of an entire safe incorporating the device of the present invention. FIG. 2 is a view of the apparatus according to the embodiment of the present invention as viewed from the back side of the door. FIG. 3 is a sectional view taken along the line III-III in FIG. 2; FIG. 4 is a sectional view taken along the line IV-IV in FIG. 2; FIG. 5 is a view of a main part of the device in a state where the device is unlocked by a normal unlocking operation, as viewed from the back side of the door. FIG. 6 is a sectional view in the same state. FIG. 7 is a view of a main part of the device in a state where the device is unlocked by an unlocking operation using an emergency key, as viewed from the back side of the door. FIG. 8 is a sectional view of a main part in a state where the safe is overturned. [Description of Signs] 1 Safe body 2 Door 4 Operating section for bar member operation 10 Bar member 12 Lock member 20 Lock driving member 21 Solenoid 22 Plunger 24 Stopper engaging part 25 Stopper member 27 Horizontal axis

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Claims (1)

(57) [Claims 1] A bar member which can be linearly moved between a locked position and an unlocked position on a safe door, and a bar member operating operation for moving the bar member And a lock member that can be switched between a locked state and an unlocked state that prevents the bar member from moving to the unlocked position in response to the driving of the locking drive member. The locking driving member has a plunger which is actuated by a solenoid and is engaged with and disengaged from the locking member. The plunger is disposed substantially in a horizontal direction, while a stopper is engaged with the locking member. And a stopper member corresponding to the stopper engagement portion is rotatably supported on the door via a horizontal axis in a direction orthogonal to the plunger, and the stopper member has its own weight. Maintain the state of hanging from the shaft, and when the safe is in the normal state, it is disengaged from the stopper engaging part, and when the safe falls down so that the plunger faces up and down, it engages with the stopper engaging part. A lock device for opening and closing a door of a safe, characterized in that the device is arranged so as to be closed.