JPH0546624Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field] The present invention mainly relates to a storage box for storing room keys and the like.

[Background Art] This type of storage box has traditionally been known as a so-called key box, but conventional key boxes cannot receive external signals that can be obtained in emergencies such as when a fire breaks out, there is an intruder, or when a device malfunction occurs. When received, the door will open automatically. Therefore, after the emergency situation has passed and the external signal has stopped, the door must be closed manually, and even if the keys in the keybox are not actually being used, they must be inspected one by one and the door closed. I have to go around closing the door, and I often forget to close it.

[Purpose of the invention] The present invention was made in view of the above points, and its purpose is to enable the door to be opened when an external signal is generated, and to open the door when the external signal stops. To provide a storage box whose door is automatically returned to its original locked state if the door is not opened.

[Disclosure of the invention] (Structure) The storage box according to the invention includes a main box having an opening on the front, a door that is pivotally attached to one edge of the opening of the main box to open and close the opening, and a door. It is attached to the other end and can be moved between a locked position where the tip protrudes outward from the periphery of the opening when the door closes the opening, and an unlocked position where the door is located inside the periphery of the opening. The lock is equipped with a dead bolt that is rotatable around an axis that is approximately parallel to the opening surface of the main box, and when the door closes the opening, the dead bolt engages in the locked position and is in the unlocked position. Here, a lock member is provided with an engagement groove that releases the engagement, a first position that engages with the lock member and prohibits rotation of the lock member, and a lock member that is disengaged from the lock member and rotates the lock member. a latch member that is movable between the first position and the second position; a solenoid that moves the latch member between the first position and the second position; and a door switch that detects whether the door is open or closed. It consists of a control circuit that drives a solenoid according to an external signal generated in an emergency and the open/closed state of the door switch. A notch is formed that allows the dead bolt to be inserted and removed when the door is opened and closed, and the engagement groove is formed in a partially open shape, and the latch member is in the second position and the dead bolt is in the locked position. When the door is opened, the tip of the deadbolt presses the inner edge of the engagement groove, causing the locking member to rotate, allowing the deadbolt to escape from the engagement groove, and when the door is closed, the tip of the deadbolt pushes the inner edge of the engagement groove. When the inner peripheral edge of the latch member is pressed and the lock member rotates, the dead bolt is introduced into the engagement groove, and the latch member
When the dead bolt is in the locked position, the dead bolt is engaged with the engagement groove to inhibit the door from opening, and the control circuit locks the door by driving the solenoid when an external signal is generated. When the member is set from the first position to the second position, and the external signal stops with the door closed, the latch member is returned to the first position, and the external signal stops with the door open. In some cases, the latch member is returned to the first position after the door switch detects that the door is closed, and under normal conditions, the items stored in the main box are opened and closed by opening and closing the lock. Stored items can be safely stored by taking them out, and in an emergency such as a fire, the lock can be used by driving a solenoid with an external signal to release the locked state of the lock member by the latch member. This makes it possible to open the door without any trouble. Moreover, when the fire is extinguished or the external signal is just a false alarm and the door is restored, if the door was closed when the external signal stopped, the lock member is bound by the latch member and automatically returned to its previous state. If the door is open at that time, wait until the door is closed, then bind the lock member with the latch member and check what is stored in the main box with the door open. The device can be returned to its previous state simply by closing the door.

(Example) As shown in Figures 1 to 3, the main box 1
is formed by mounting an inner box 12 with an open front inside an outer box 11 with an open front, and an inner door frame 13 is fixed to the edge of the opening of the inner box 12. This inner door frame 13 is fixed to a mounting piece 15 extending on the front surface of the outer box 11 using mounting screws 16.
A door 2 is pivotally attached to one side edge of the door 3 (the right side edge in FIG. 3) via a hinge 21. An outer door frame 14 is fixed to the inner door frame 13, and when the door 2 comes into contact with the periphery of the inner door frame 13 and the opening of the inner box 12 is closed, the front surface of the outer door frame 14 and the door 2 The front surface is positioned on the same plane.

A lock 3 is provided at the end of the door 2 opposite to the hinge 21. The lock 3 has a keyway 31 on the outside of the door 2.
A dead bolt 32 disposed inside the door 2 can be rotated by a key inserted into the key groove 31. The dead bolt 32 is shown in Fig. 1a.
The position facing upward is the unlocked position, and the position facing left is the locked position. A notch 17 is formed in the inner door frame 13 at a portion corresponding to the lock 3, and the dead bolt 32 is inserted into this notch 17 in the locked position. Notch 1
A locking device 4 cooperating with a dead bolt 32 is located within the lock 7.

The main parts of the locking device 4 are disposed in the space between the outer box 11 and the inner box 12, and include a locking member 41, a latch member 42, a solenoid 4
3, a door switch 44, and an operation confirmation switch 45. A lock member 41, a latch member 42, and a solenoid 43 are connected to a frame 4 fixed to the inner box 12.
The lock member 41 and the latch member 42 are attached to a shaft 47, which is attached to a frame 46, respectively.
It is rotatable around 48. As shown in FIG. 4, the lock member 41 has an upwardly opening engagement groove 41a at its front end, into which the dead bolt 32 of the lock 3 is engaged. Further, when the locking member 41 is rotated forward by a predetermined amount around the shaft 47, the dead bolt 3 is removed from the engagement groove 41.
2 is coming off. A step 41b is formed at the upper end of the locking member 41, and this step 41b can be engaged with an engaging step 42a formed at the lower edge of the latch member 42. The engagement step 42a is formed at the rear of the shaft 48, and the latch member 42 connects the screw 43 to the plunger 43a of the solenoid 43 further behind the engagement step 42a.
It is connected using b. When the solenoid 43 is energized, it pulls the plunger 43a upward, but when it is not energized, a return spring 43c is provided so that the plunger 43a protrudes downward.
In the position where the plunger 43a protrudes downward, the latch member 42 is set in the first position,
The engagement step 42a is engaged with the step 41b of the locking member 41 to restrict forward rotation of the locking member 41, and when the plunger 43a is pulled upward, the latch member 42 is set at the second position. Then, the engaging step portion 42a is disengaged from the step portion 41b of the locking member 41, and the locking member 41 can now rotate forward. The door switch 44 is a micro switch, and is a button 44 protruding from the front of the inner door frame 13.
When a moves forward or backward as door 2 opens or closes, button 44
It is designed to open and close as a moves forward and backward.
That is, the door switch 44 detects whether the door 2 is closed. Further, the operation confirmation switch 45 is in contact with the latch member 42, and is opened and closed when one end of the latch member 42 moves up and down. That is, the operation confirmation switch 45 detects whether the latch member 42 is set at the first position or the second position.

With the above configuration, when the plunger 43a is pulled upward and force is applied in the direction to open the door 2 even when the dead bolt 32 is engaged with the engagement groove 41a, the lock member 41 is rotated forward. The engagement between the dead bolt 32 and the lock member 41 can be released, and the door 2 can be opened.

The solenoid 43 is connected to a control circuit 5 along with a door switch 44 and an operation confirmation switch 45, and the control circuit 5 operates as shown in FIG. That is, in an emergency such as a fire, an intruder, or an abnormality in equipment, when an external signal is input from a sensor that detects such an emergency, the solenoid 43 is driven and the plunger is activated. 43a upward, the dead bolt 32 remains engaged with the engagement groove 41a, but the locking member 41 can now be rotated forward, so the door 2 remains closed but is effectively opened. The door 2 becomes locked, and the door 2 can be opened as needed. Now, if door 2 is opened,
When the cause of the external signal is eliminated and the external signal is stopped while the door 2 is open, the latch member 42 is restored to the first position and locked when the door 2 is closed. Furthermore, if the external signal stops while the door 2 is not open, the latch member 42 is moved to the first position.
It is then restored to its original position and locked. In this way, the doors 2 that are not open can be immediately locked as before, so there is no need to sequentially close the doors 2 after restoration. Here, the external signal is not necessarily limited to one generated in an emergency, and may of course be a simple locking signal or unlocking signal.

[Effects of the invention] As described above, the present invention has a notch formed in the periphery of the opening of the main box at the part corresponding to the dead bolt that allows the dead bolt in the locked position to be moved in and out when the door is opened and closed. The engagement groove is formed in a partially open shape, and when the door is opened when the latch member is in the second position and the dead bolt is in the locked position, the tip of the dead bolt will open the engagement groove. The inner circumferential edge is pushed and the locking member rotates, allowing the dead bolt to escape from the engagement groove. When the door is closed, the tip of the deadbolt presses the inner circumferential edge of the engaging groove and the locking member rotates, thereby removing the deadbolt. When the latch member is in the first position and the deadbolt is in the locked position, the deadbolt and the deadbolt engage with the groove to prevent the door from opening, and the control circuit receives an external signal. sets the latch member from the first position to the second position by driving the solenoid when the door is closed, and returns the latch member to the first position when the external signal stops with the door closed; When the external signal stops while the door is open, the latch member returns to the first position after the door switch detects that the door is closed. Under normal conditions, the latch member returns to the first position by opening and closing the lock. The items stored in the box can be safely stored by taking them out, and in an emergency such as a fire, the locking state of the locking member by the latch member is controlled by driving a solenoid using an external signal. This has the advantage of allowing the door to be opened without using a lock. Moreover, when the fire is extinguished or the external signal is just a false alarm and the door is restored, if the door was closed when the external signal stopped, the lock member is bound by the latch member and automatically returned to its previous state. Since the door is locked, there is no need to close the door after the external signal stops, which has the advantage of preventing forgetting to close it.Furthermore, if the door is open when the external signal stops, the door can be closed. Since the lock member is tied with the latch member after waiting until the end of the lock, the previous state can be restored by simply closing the open door without using a lock. This has the advantage of making management easier.

[Brief description of the drawings]

Figures 1a, b, and c are a front view, a vertical cross-sectional view, and a horizontal cross-sectional view, respectively, showing an embodiment of the present invention. Figure 2 is an exploded perspective view of the main parts of the same, and Figure 3 is an exploded perspective view of the same. , FIG. 4 is a perspective view of the main parts of the same, FIG. 5 is a block diagram of the control system of the same, and FIG. 6 is a flowchart showing the operation of the control circuit used in the above. 1 is the box body, 2 is the door, 3 is the lock, 4 is the lock device, 5 is the control circuit, 32 is the dead bolt, 41 is the lock member, 41a is the engagement groove, 42 is the latch member, 43 is the solenoid, 44 is the door It's a switch.

Claims (1)

[Scope of utility model registration request] a main box having an opening on the front; a door pivotally attached to one edge of the opening of the main box to open and close the opening;
It is attached to the other end of the door and is located between the locked position where the tip protrudes outward from the periphery of the opening when the door closes the opening and the unlocked position where it is located inside the periphery of the opening. A lock with a movable dead bolt is rotatably arranged around an axis approximately parallel to the opening surface of the main box, and the dead bolt engages and disengages in the locked position when the door closes the opening. In the locked position, a lock member is provided with an engagement groove that releases the engagement, and in a first position that engages with the lock member and prohibits rotation of the lock member, and in which the lock member is released from the engagement with the lock member. a latch member that is movable between a second position and a second position, a solenoid that moves the latch member between the first position and the second position, and a door that detects whether the door is open or closed. It consists of a switch and a control circuit that drives a solenoid according to an external signal generated in an emergency and the opening/closing state of the door switch, and a locking position is located at the periphery of the opening of the main box, corresponding to the dead bolt. A notch is formed to allow the dead bolt to enter and exit when the door is opened and closed, and the engagement groove is formed in a partially open shape, so that the latch member is in the second position and the dead bolt is in the locked position. When the door is opened, the tip of the dead bolt presses the inner circumferential edge of the engagement groove and the locking member rotates, causing the dead bolt to escape from the engagement groove. When the door is closed, the tip of the dead bolt presses the inner edge of the engagement groove, causing the lock member to rotate. The dead bolt is introduced into the engaging groove by pushing the inner peripheral edge of the engaging groove and rotating the locking member, and when the latch member is in the first position and the dead bolt is in the locked position, the dead bolt and the engaging groove are connected. The engagement inhibits opening of the door, and the control circuit sets the latch member from the first position to the second position by actuating a solenoid when an external signal is generated to close the door. When the external signal stops with the door open, the latch member returns to the first position, and when the external signal stops with the door open, the latch member returns to the first position after the door switch detects that the door is closed. A storage box that is characterized by being able to return to its original position.