JPH0216832B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a plurality of rooms or rental rooms arranged inside a room that can be entered and exited only from a specific entrance, such as a safe deposit box in a hospital, research institute, or bank. The first one attached to each door plate of the safe space.
The present invention relates to a lock device that can unlock both a second lock and a second lock that controls entry and exit to the safe deposit box of the hospital, research institute, etc. or bank with a single magnetic card.

Traditionally, hospitals, research institutes, etc. (hereinafter referred to as "places") have multiple rooms that must be locked, and the door plates of each entrance to these rooms usually have a
Mechanical locks such as tumbler locks are installed, and entry is controlled by allowing specific persons authorized to enter and exit the room to lock and unlock the room using their own keys. However, with this method, if one specific person loses the key, the keys owned by each of the other specific persons and the door plate lock itself must be replaced to prevent misuse by a third party. There were flaws. Further, in the case of a specific person who is permitted to enter and exit multiple rooms, the user must possess and manage multiple keys, and selecting a key is also troublesome.

For this reason, entry control is also carried out in which keys are managed by a manager such as a guard, and a specific person is verified and identified by requesting the presentation of an identification card, etc. However, with this method, when the number of rooms to be managed increases, the number of people in charge This method has the disadvantage of requiring an increase in staff, and also has the disadvantage that it takes time to check on people entering the room, making it impossible to smoothly manage entry.

Therefore, an entry control device was developed that allows only specific persons to enter the control room using an electronic unlocking device that uses a personal card.
Publication No. 118168, Japanese Patent Publication No. 118168, Japanese Patent Publication No. 118168-
It is disclosed in Publication No. 50264. However, all of these conventional technologies are devices that manage entry into a plurality of rooms arranged inside a place, but do not manage entrances and exits to the place itself. The lock provided on the door has the drawback that it requires a lot of time and effort, as a security guard or other manager must verify the identity of the person before unlocking the door.

On the other hand, in a safe deposit box at a bank, if a customer wishes to use a safe deposit box for which they have a contract, they will inform the safe deposit box management person at the bank at the reception department, who will confirm their identity and use the safe deposit box. The customer unlocks the lock placed on the door plate of the entrance/exit of the room and enters the safe deposit box with the customer. Both parties then accompany each other to the contracted safe deposit box, and after the manager unlocks the bank lock on the door plate of the safe deposit box, the customer unlocks the customer lock next to it using the customer's key. This required an extremely complicated procedure and collaborative effort to open the door plate of the safe deposit box.

For this reason, the bank was burdened with the labor burden of having to send a person in charge every time a large number of customers requested the use of a safe deposit box, which greatly affected management costs. Therefore, as an improvement on this, a centralized management system was developed in which the bank's reception department uses a computer to lock and unlock the bank locks required each time a customer uses the safe deposit box, but the wiring In addition to requiring a large amount of money and time, in the case of existing safety deposit boxes, it is often difficult to modify them, making it difficult to apply them to the large number of facilities already in use.

The present invention has been made in order to solve the above-mentioned problems.The present invention has been made in order to solve the above-mentioned problems. To provide a lock device capable of unlocking both a lock and a second lock disposed on a door plate of the entrance/exit door with a single magnetic card.

Hereinafter, the present invention will be explained in detail with reference to the accompanying drawings.

FIGS. 1 to 5 show a first embodiment in which the present invention is applied to a plurality of rooms arranged in a place and a place.

FIG. 1 is a plan view showing one side of a place suitable for carrying out the invention. In the figure, room A has only one entrance and exit a, and is surrounded on all four sides by walls b. Inside the room, there are many rooms B, which are locked by a first lock, which will be described later. Therefore,
It is so designed that no one can enter or exit from Room B without passing through the only entrance/exit (a). Entrance/exit a is double-installed with a stirrup door 11a and an automatic door 12a.The stirrup door 11a remains open during office working hours, but the automatic door 12a is normally closed and the A second lock 31a is provided which can be opened for a certain period of time only by an opening signal from an entrance reader 21a provided on the outer wall or an exit reader 22a provided on the inner wall.

FIG. 2 is a partial front view showing an example of a large number of rooms B arranged inside the room. In the figure, a door plate 11b is attached to the opening serving as the entrance/exit of each room to close the opening. Door plate 11b
At one end of the back side, there is a lock on the opening frame 13b side,
As shown in FIGS. 3 and 4, the locking bolt 14b
A room lock 20b which is unlocked and unlocked by moving laterally is provided, and its keyhole 21b is electrically connected to the front surface of the door plate 11b. The room lock 20b can be unlocked with a different lock for each room, and the key for each room lock is
A specific person who is allowed access to each room owns it. A first lock 3b is attached to the front surface of the door plate 11b of the room B so that the keyhole 21b of the room lock 20b is normally covered, and only when the first lock 31b is unlocked. The keyhole 21b can be exposed.

3 and 4 show the keyhole 2 of the room lock 20b.
1b are a perspective view and a plan sectional view showing an example of a first lock 31b that covers 1b. In the figure, a main body 31 of a first lock 31b is fixed to a portion including a keyhole 21b provided on the front surface of the door plate 11b. This main body 31 is a horizontally elongated hollow rectangular body formed by bending a metal plate, and the part that covers the keyhole 21b is formed thinner than the main body thick part 34, and a window 33 is provided in the front surface thereof. This window 33 is normally covered by a part of a sliding member 36 provided inside the main body 31, which will be described later, and when the window 33 is opened by the sliding operation of the sliding member 36, the keyhole 21b is opened. is exposed so that the room lock 20b can be unlocked. Further, in the side surface 32 of the thick part of the main body adjacent to the window 33, an insertion hole 35 for receiving the magnetic card C is provided.
is provided.

The magnetic card C is issued to the users of each room by the person in charge of managing each room, and has the required dimensions corresponding to the insertion hole 35 on the side surface 32 of the main body thick part, and A magnetized portion is provided at each coordinate position of a predetermined matrix on the surface. This magnetized section encodes the user's registration number, room number, etc., and sends the code to an encoder D as shown in Figure 5.
By inputting , each coordinate position of the matrix can be magnetized to N pole or S pole. Furthermore, the magnetic force is both strong and persistent. The encoder D has soft iron rods each having a cross-sectional area corresponding to the area of one element of the magnetized portion at each coordinate position of the matrix corresponding to the position of the magnetized portion provided on the magnetic card C, A magnetic coil is wound around each of these soft iron bars. A driving DC power source equipped with a changeover switch is connected to the tip of the magnet coil, and by reversing the changeover switch, the direction of the current flowing through the magnet coil is changed, and the polarity of the tip of each soft iron rod is changed. This is to magnetize the magnet to either the north pole or the south pole. Since the magnetized PIN code is a code that specifies each room, the lock device in a specific room can be unlocked, but the lock device in other rooms cannot be unlocked.

In FIG. 4, the sliding member 36 that covers the keyhole 21b of the room lock 20b is a rectangular plate stepped in accordance with the cross-sectional shape of the main body 31, and is fitted into the main body 31 so that the keyhole 21b is Door plate 1 in the direction of exposure
It is designed to be able to slide parallel to the plate surface of 1b. The length on the side of the window from the stepped portion is sufficient to cover the window 33 when the sliding member 36 slides in the direction of closing the window 33, and the length on the side of the thick part of the main body from the stepped portion The length is such that there is sufficient room inside the main body 31 when the sliding member 36 slides in the direction of opening the window 33. Inside the main body thick portion 34, a plate-shaped locking member 3 is provided on the door plate 11b side of the sliding member 36.
7 is fixed. A required number of magnet pins 38 are loosely fitted into each coordinate position of the matrix corresponding to the magnetized portion of the magnetic card C on the plate surface of the locking member 37, and extend and retract in a direction perpendicular to the plate surface. That is, one end of the magnet pin 38 is supported on the inner surface of the main body 31 via a spring 39, and the other end is pressed in the direction of the sliding member 36 by the slight pressure of the spring 39.
The sliding member 36 has one side thereof at a position corresponding to each of the magnetic pins 38 in a state where the window 33 is completely covered, that is, at each coordinate position of the matrix corresponding to the magnetized portion of the magnetic card C. An engagement hole 40 is bored. and,
The tip of the magnetic pin 38 is connected to this sliding member 3.
6 and locks the movement of the sliding member 36. This is the locked state of the first lock 31b, and the N-S polarity of the magnetic pin 38 at each coordinate position of the matrix constitutes a different password for each room, and the sliding member 36 and each magnetic pin 38 are connected to each other. constitutes an identification means for the inserted magnetic card C.

Here, the magnetic card C is inserted into a predetermined position from the insertion hole 35 on the side surface of the thick part of the main body, and the position point and polarity of the magnetic card C are correctly magnetized. If the card side pole of the magnetic pin 38 is N,
The polarity of the magnetic card C at that position is N, and if the pin is S, the cards are also S, and they repel each other.The repulsive force overcomes the slight pressure of the spring 39, and the magnetic pin 38 is attached to the door plate. pushed to the side,
It escapes from the engagement hole 40 of the sliding member 36. That is, the sliding member 36 becomes movable and the window 33
It is also possible to unlock the room by opening the door, and the first lock 31b is now unlocked. if,
If the magnetized position or polarity of the magnetic card C given by the encoder is wrong, or if the user operates a lock in another room, the magnetic pin 38 will engage the sliding member 36. remains,
The first lock 31b is not unlocked.

Next, FIGS. 6 to 12 show a second embodiment in which the present invention is applied to a plurality of safe deposit boxes arranged in a safe deposit box and indoors in a financial institution. In the figure, the door plate 11 of each safe deposit box
A door lock 121b as a customer lock and an outer lock 131b as a bank lock are attached to 1b, and the outer lock 13
The horizontally elongated lid body 1b covers the keyhole of the door lock 121b and the base of the outer lock itself adjacent to the keyhole.
The lid body is fitted onto the base body so as to be slidable in the longitudinal direction, and is designed to have dimensions such that the keyhole is exposed when the lid body is slid toward the side far from the keyhole. The lid body in this embodiment is provided with an insertion slot for the magnetic card C on the side surface far from the keyhole, but the position of the insertion slot depends on the layout of the room and the structure of the door or door lock, and this does not limit the present invention. It's not something you do.

The magnetic card C is the same as the magnetic card used in the first embodiment, and is made of barium ferrite.

7 and 8 are cross-sectional views of the first lock,
The above-mentioned magnetic card C is shown inserted. In the figure, the first lock, that is, the outer lock, is the door plate 11.
A substrate 101 fixed to 1b and its base 101
The cover body 102 is slidably fitted into the cover body 102. The base body 101 of the outer lock occupies a horizontally elongated part of the surface of the door plate including the keyhole 121b' of the door lock 121b, but a window 11 of a size that sufficiently exposes the keyhole 121b' is opened. The base 101 includes
A storage plate surface 112 for holding the magnetic card C is fixed parallel to the door plate surface, and a magnet pin 113 is loosely fitted approximately perpendicular to the plate surface. The N-S polarity of the magnetic pin 113 and the coordinate position on the storage plate surface are different authentication codes for each safe square.
13 constitutes an identification means for the stored magnetic card. Magnet pin 113 is spring 11
4 on the storage surface 112, and is lightly pressed against the first member 115 by the slight pressure of the spring 114. The first member 115 includes an inner plate 115a that contacts the storage plate surface 112 and a lid 1.
The inner plate 115 is a sliding lever that is integrally formed with a U-shaped cross section by making the outer plate 115b that comes into contact with the outer plate 115b parallel to the outer plate 115b and connecting the ends in the same direction with a connecting plate 115c.
An engagement hole 115d is bored at the coordinate position corresponding to the magnet pin 113 in a, and when the sliding lever 115 reaches a predetermined locking position, one end of the magnet pin 113 engages with this engagement hole 115d. However, the operation of the sliding lever 115 is locked. When the magnetic card C is inserted and the polarity and coordinate position of the magnetic card assigned by the encoder in the reception department match the authentication number of the safe deposit box, the magnet pin 113 is engaged by the magnetic force of barium ferrite. It is pulled out from the mating hole 115d, and the sliding lever 115 is unlocked. The unlocked sliding lever 115, ie, the first member, can be moved from the locked position to the unlocked position.

Further, a pair of support columns 117 are planted in the base body 101, and a shaft 118 is provided between the ends of the support columns 117.
is constructed, and a rotating lever 116 that rotates around this shaft 118 is attached. The rotary lever, that is, the second member 116 is integrally formed with a pair of arms 116a attached to the shaft 118 and an engagement plate 116b spanning between the ends thereof, and is suspended between the shaft 118 and the engagement plate 116b. spring 119
The engagement plate 116b is always urged in a rotating direction so as to press into contact with the lid body 102.
At the same time, the slope portion 116b' of the engagement plate 116b is in sliding contact with the slope portion 115b' of the outer plate 115b of the sliding lever 115, and when the sliding lever 115 moves from the locking position to the unlocking position. Interlockingly, it rotates in the direction of detaching from the lid body 102 against the force of the spring.

On the other hand, the lid body 102 is a horizontally elongated hollow trapezoidal cube formed by bending a metal plate and has dimensions that cover all of the above-mentioned base bodies, and the bottom of the trapezoid is opened and the square is closed with the door plate surface instead. It is fitted into the base body 101 in such a manner that it can be slid freely in the longitudinal direction. A magnetic card insertion slot 120 is provided on the side. Two protuberances 122 and 123 are formed on the inside of the lid surface 121, which corresponds to the top surface of the trapezoid, on the opposite side from the door plate surface, and the lid body 102 is in a covering position or an exposed position with respect to the keyhole of the door plate. At times, it engages with the engagement plate 116b of the rotating lever 116 to stop the sliding movement of the lid 102. It is in the locked state when it is locked to the rotary lever in the concealed position, and it can be unlocked if the rotary lever is released and the lid body 102 can be moved to the keyhole exposed position.

Next, the unlocking operation of the device of the second embodiment will be explained.

The customer inserts the magnetic card C, which has been magnetized at the reception department of the bank, into the insertion slot of the outer lock of the safe deposit box with which the customer has contracted. In this state shown in FIGS. 7 and 8 above, the rotating lever 116 is pressed against the lid body 102, and the protrusion 122 is in contact with the rotating lever 102.
16, the lid 102 cannot be slid.

Now, when the polarity and coordinate position of the magnetic card C match those of the safe deposit box, the magnetic pin 113 is pulled out from the engagement hole 115d by magnetic force, and the sliding lever 15 is unlocked. Here, when the customer further pushes in the magnetic card C, the sliding lever 15 slides on the driving plate 115e as a pair, so the magnetic card C moves the sliding lever 115 to the unlocked position via the driving plate 115e. move it. FIG. 9 is a sectional view showing the bank lock of the present invention in this state. In the figure, sliding lever 1
15 is in the unlocked position, and the rotating lever 116 is pushed by the slope 115b' of the outer plate of the sliding lever, and the lid body 1
02 is disengaged from the protrusion 122.

The operation of the two levers will be explained in more detail with the aid of the figures. FIG. 10 is a perspective view showing an example of the first member and the second member. Beveled surface 115 of the outer plate of the first member or sliding lever 115
b' comes into sliding contact with the engagement slope 116b' of the second member, ie, the pivot lever 116. FIG. 11 is a sectional view showing the moving relationship between the two levers and the lid. FIG. 11A is a diagram in the already-described locked state, in which the engagement plate 116b engages the protuberance 122 of the lid. When the sliding lever 115 moves in the direction of the arrow from this state, the rotating lever rotates while slidingly contacting the slope, and the engagement plate 116b is separated from the protuberance 122. FIG. 11B is a diagram in that state, in which the sliding lever 1
15 has been moved to the unlocked position. Next, the customer lightly presses the magnetic card with one hand and pulls the lid away from the keyhole with the other hand. Since the lid is already unlocked, it will start sliding. . FIG. 11C is a diagram showing the state of each member after the sliding starts. Since the engagement plate 116b is in sliding contact with the protuberance 122, the lid continues to slide even when the customer releases the magnetic card and the sliding lever 115 returns to the locking position. Since the top surface of the protuberance 122 is a gentle slope that loses its protuberance height on the keyhole side, the engagement plate 116b rotates due to the spring force as the lid slides, and finally, another protuberance is formed. 12
3 to lock the lid. FIG. 11D is a diagram showing this final unlocked state, and at this time,
The lid body is in the exposed position, the keyhole of the door lock is exposed, and the customer can use the safe deposit box by unlocking the door lock, that is, the guest lock, with his or her own key.

FIG. 12 is a sectional view showing the bank lock of the present invention in an unlocked state, and corresponds to the state shown in the partial view of FIG. 11D. The important point to note here is that
Since the magnetic card C is completely inserted into the lid 102, the customer cannot take the magnetic card into his/her hand unless he/she locks the outer lock again. Therefore, when a magnetic card is required to leave a safe deposit box, or when a magnetic card is returned to the bank, it is necessary to confirm that the outer lock is locked, and the bank does not have to make any effort. This means that the bank lock has been fully managed. This is another effect of the present invention that is extremely valuable in terms of flood prevention.

Now, regarding the locking operation, the customer simply
02 in the opposite direction to the unlocking operation.
The pivot lever 116 slides over the gentle slope of the ridge 122, and when the lid 102 reaches the cover position,
It rotates under the force of the spring and engages with the protuberance 122 to hold the lid. The slide lever 115 returns to the engagement position, and when the customer removes the magnetic card C from the insertion slot, the magnetic pin engages with the engagement hole and locks the slide lever, completing the locking.

Note that depending on where the safe deposit box is placed in the room, the part of the door plate where the door lock is attached varies. Depending on each case, it is conceivable to move the arrangement of each member of the present invention to point symmetry, line symmetry, or plane symmetry, but any of these methods does not exempt from the scope of the present claims.

It goes without saying that when the unlocking device according to the present invention is attached to a door plate, the bank lock of the double-lock safe deposit box lock is used in an unlocked state.

Next, a second lock unlocking device using the above magnetic card will be explained.

FIG. 13 is a block diagram showing an example of an automatic entrance/exit door unlocking device embodying the present invention. In the figure, the unlocking device includes an encoder D, an automatic door 2a, an entrance reader 21a, and an exit reader 22.
a, and a magnetic card receiving means 23a. The encoder D is installed in a reception department where a local management person is stationed, and includes a keyboard 11d, a memory 12d, and an encoder solenoid 13d. When a user requests the use of a room to the management person, the management person confirms his/her identity, sets a magnetic card C in the encoder solenoid 13d, and inputs the user's registration number and room number using the keyboard 11d. Type in. keyboard 11d
The memory 12d, into which the registration number and room number have been input, reads out magnetic property information regarding the position and polarity of the magnet pin of the first lock in the room used by the user, using these addresses as addresses.
This magnetic characteristic information is magnetized to the magnetic card C by an encoder solenoid, and is also sent to the entrance reader 21a and the exit reader 22a, which are detection means, as an authentication code. The entrance reader 21a is placed outside the wall and includes a detection solenoid 21, a detection circuit 22, and an oscillator 23. The user who received the magnetic card C from the person in charge of the facility comes to the entrance of the facility and reads the entrance reader 2.
When the magnetic card C is inserted into 1a, the reaction of the detection solenoid 21 is read out by the detection circuit 22, and the magnetic characteristics of the magnetic card C are detected. The exclusive OR gate 24 confirms whether this magnetic property matches the magnetic property information sent from the memory 12d, and when the AND gate 25 integrates that they match for all magnet pins, a door closing signal is sent. Sent. A similar procedure is carried out at the exit reader 23a installed within the facility on the way back to the facility.
The door open signal will still be sent. When a door opening signal from either of them is sent to the automatic door 12a via the OR gate 26, the automatic door 12a is opened for a certain period of time. Note that the destination of the door opening signal does not have to be an automatic door.
It may be an unlocking part of an electronic lock provided on the door. In any case, according to the present invention, the second lock is unlocked using the magnetic characteristic information of the polarity and position magnetized on the magnetic plate surface of the magnetic card as an authentication code.

Now, after removing the magnetic card, the user entered the facility and went to the front of the room he was using.
The user inserts the magnetic card into the first lock and unlocks it as described above, and then uses his/her own key to unlock the room.

When the user finishes using the room, the user locks the room.
Remove the magnetic card and lock the room.
When leaving the room, use the exit reader 22 installed inside the facility.
Insert the magnetic card C into the entrance reader 2.
Following the same procedure as step 1a, if the magnetic property information of the magnetic card C matches the content sent from the memory 12d, a door open signal is issued, the automatic door 12a is opened for a certain period of time, and the user can leave the room. .

When leaving the room, the user may remove the magnetic card and return it to the person in charge of management, or may not remove it. When the magnetic card is left in the exit reader, as shown in FIG. It is taken into the storage section. FIG. 14 is a schematic diagram showing an example of the magnetic card loading means according to the present invention. In the figure, the magnetic card retrieval means is provided inside the exit reader 22a and includes a starting circuit 27, a solenoid 28, an iron core 29, and a storage section 30. When the magnetic card C is inserted into a predetermined position of the exit reader 22a, the magnetic card C is suspended by the iron core 29 above the storage section 30. Here, the magnetic characteristic information of the magnetic card C is read by the detection circuit 22, and if the determination circuit 24' (corresponding to 24 to 26 in FIG. 13) determines that the information matches the contents from the memory, the A door opening signal is issued and sent to the moving door, and at the same time, it is also sent to the activation circuit 27 of the magnetic card receiving means. When a current flows from the starting circuit 27 to the solenoid 28 and the iron core 29 is retracted, the magnetic card C, which has lost its fulcrum, falls and is stored in the storage section 30. The number of stored magnetic cards will be collected by the management staff as appropriate.
It is demagnetized by a degaussing device as a decoder and then used for the next time. In this way, the magnetic cards used in the present invention do not need to be created for the number of rooms that need to be managed, and only need to be issued for the number of rooms that need to be used, making card management easy, economical and versatile. rich in

Furthermore, as an application of this embodiment, by connecting a printer to the determination circuit, it is easy to make hard copies of information management records (room number, user name or registration number, usage time, leaving time, etc.). be.

As explained above, according to the lock device according to the present invention, it is possible to unlock and lock the first lock and the second lock, each of which has a different method, with a single small magnetic card. The magnetic property information given to the magnetic card is written by the person in charge of management each time the room is used, so it is necessary to manage the authentication of entry and exit within the facility and the unlocking of the first lock for each room. It can also be used as information. Moreover, by installing the lock device of the present invention in a state where the existing lock part is covered, an important room can be managed by a plurality of users. Furthermore, since a communication cable and a power cable are not required in the unlocking section, the lock device can be installed extremely easily. Therefore, even during a power outage, if a master card is issued in advance, each room can be used.

That is, the present invention provides security, labor-saving, economic efficiency, and has practically important effects in that it can be easily attached to conventional locking devices.

[Brief explanation of drawings]

FIG. 1 is a plan view showing an example of the inside of the facility; FIG. 2 is a partial front view showing an example of a room equipped with a first lock;
FIG. 3 is a perspective view of the first lock according to the present invention;
The figures are a sectional view showing an example of the structure of the first lock according to the present invention, Fig. 5 is a schematic diagram of an encoder, Fig. 6 is a perspective view showing a second embodiment of the invention, and Fig.
8 and 8 show a sectional view of the first lock in the second embodiment, FIG. 7 is a sectional view taken along line B-B in FIG. 8, FIG. 10 is a perspective view showing an example of the first member and the second member, and FIG. 11 is a sectional view showing the bank lock of the present invention.
A cross-sectional view showing the movement relationship between the two levers and the lid;
FIG. 12 is a cross-sectional view showing the bank lock of the present invention in an unlocked state, FIG. 13 is a block diagram showing an example of an unlocking device for an automatic entrance door according to the present invention, and FIG.
The figure is a schematic configuration diagram showing an example of a magnetic card taking-in means. A... Location, B... Room that needs to be locked, C...
...magnetic card, D...encoder, 12a...automatic door, 21a...reader for entrance, 22a...reader for exit, 23a...magnetic card retrieval means, 21
b... Room lock keyhole, 31b... First lock, 21...
...Detection solenoid, 22...Detection circuit, 23...
Oscillator, 31...Main body, 32...Step part, 33...
Window, 34... Thick part side of main body, 35... Insertion hole, 3
6...Sliding member, 37...Locking member, 38...Magnetic pin, 11d...Keyboard, 12d...
...Memory, 113...Magnetic pin, 115
...First member, 131b...Outer lock.

Claims (1)

[Claims] 1. A lock that is attached to the door plate of each of multiple rooms arranged inside a room with limited entrances and exits, and locks and unlocks the door plate by moving laterally to the lock receiver on the opening frame side of the room. a first lock comprising a bar, a sliding member, and a magnetic pin engaged with the sliding member;
a second lock disposed on a door plate of an entrance/exit of the room, including an entry reader and an exit reader, and a second lock having a magnetic material and having an unlocking function for the first lock and the second lock; an encoder that writes a password for unlocking the first lock and the second lock on the magnetic material as magnetic characteristic information; A magnetic card that decodes the magnetic property information of the magnetic card to issue an unlocking signal for the second lock, and that includes an activation circuit, a solenoid, an iron core, and a storage section provided inside a reader for leaving the room after the decoding when leaving the room. A lock device comprising: a detection means for instructing the retrieval means to retrieve a magnetic card.