JP2016079644A - Electronic lock system, unlocking method, and terminal device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electronic lock system capable of temporarily granting a right to perform unlocking to a third person, using a simple method without causing a problem on security.SOLUTION: Lock identification information is transmitted from a lock opening/closing device 4 to a terminal device 3 (step S1) and is received by the terminal device 3 (step S2). Terminal identification information and the lock identification information are transmitted as identification information from the terminal device 3 (step S3) and are received by a server device 1 (step S4). It is determined whether or not the identification information has a right to perform unlocking (step S5). Unlocking information for permitting unlocking is transmitted (step S6) when it is determined that the identification information has the right, and is received by the terminal device 3 (step S7). When the unlocking information is transmitted (step S8) and is received by the lock opening/closing device 4 (step S9), unlocking is performed (step S10).SELECTED DRAWING: Figure 4

Description

  The present invention relates to an electronic lock system, an unlocking method, and a terminal device used in the electronic lock system.

  In recent years, without having to point the key in the keyhole, keyless entry that can unlock the key installed on the door etc. just by pressing the button, or putting the key in a pocket or bag, and pressing the button to the door without pressing the button Technology has been developed for electronic lock systems that can be unlocked just by approaching. These systems are convenient for users because they can be unlocked without pointing the key to the keyhole, even if you have luggage in both hands, and are widely used in the doors of apartments and cars. .

  By the way, the need for housekeeping services is increasing due to the recent increase in two-way work. When receiving a housekeeping service, there is a need to temporarily enter the client's house and perform necessary work even when the client is absent. Moreover, there is a similar need even when receiving a babysitter or home helper dispatch service. In such a case, it is conceivable to pass a matching key to a housekeeping agent staff or the like, but there is a security problem such as further duplication of the matching key, which is not preferable.

  The present invention is for solving such problems, and there is no security problem, and an electronic lock capable of temporarily granting an authority to open a key to a third party by a simple method. The purpose is to provide a system.

  The present invention relates to an electronic lock system having a server device, a terminal device that can be connected to the server device by communication, and a key opening / closing device that can communicate with the terminal device and that automatically opens and closes a key. The apparatus includes key identification information storage means for storing key identification information for identifying the key opening / closing apparatus, and key identification information transmission means for transmitting the stored key identification information to the terminal apparatus, and the terminal apparatus identifies the terminal. When terminal identification information storage means for storing terminal identification information, key identification information reception means for receiving key identification information from the key opening / closing device, and key identification information received by the key identification information reception means, it is stored in the terminal identification information storage means. And an identification information transmitting means for transmitting the received terminal identification information and the received key identification information to the server apparatus as identification information, and the server apparatus stores authority information relating to the authority to unlock the key. The identification information receiving means for receiving the identification information from the terminal device, the identification information received by the identification information receiving means and the authority information stored in the authority storage means are collated to determine whether the terminal apparatus has authority An authority determining means, and a first unlocking information transmitting means for transmitting to the terminal device unlocking information for allowing unlocking when it is determined by the authority determining means that the terminal device has authority. A first unlocking information receiving means for receiving the unlocking information from the server device; and a second unlocking information transmitting means for transmitting the received unlocking information to the key opening and closing device, the key opening and closing device further comprising: The present invention relates to an electronic lock system including a second unlocking information receiving unit that receives unlocking information from a terminal device, and an unlocking unit that opens a key when the unlocking information is received by the second unlocking information receiving unit.

  It is preferable that a validity period is set for the authority.

  The communication between the terminal device and the key opening / closing device is preferably communication by Bluetooth (registered trademark).

  The server device can communicate with other server devices, and the authority information stored in the authority storage means may be information acquired from other server devices through communication or information generated by the information. preferable.

  It is preferable that the authority information stored in the authority storage means can be set from another terminal device.

  When the strength of the signal of the key identification information received by the key identification information receiving unit is equal to or higher than a predetermined strength, the identification information transmitting unit preferably transmits the identification information to the server device.

  It is preferable that the key opening / closing device is installed with respect to the facility to which the key is attached, and the unlocking means opens the key.

  The present invention relates to an unlocking system executed in an electronic lock system having a server device, a terminal device that can be connected to the server device by communication, and a key opening and closing device that can communicate with the terminal device and automatically opens and closes a key. A method for executing a step of transmitting, to a terminal device, key identification information for identifying the key opening / closing device stored in the first storage means to the terminal device. A step of receiving from the switchgear, and a step of receiving the key identification information and transmitting the terminal identification information for identifying the terminal stored in the second storage means and the received key identification information to the server device as identification information. Executing the step of receiving identification information from the terminal device in the server device, collating the received identification information with the authority information relating to the authority to unlock the key stored in the third storage means, and the terminal device Right of And a step of transmitting unlocking information for allowing unlocking to the terminal device when it is determined to have authority, and the unlocking information is further transmitted to the server device by the terminal device. Receiving the unlocking information, and transmitting the received unlocking information to the key opening / closing device, and further receiving the unlocking information at the key opening / closing device, further receiving the unlocking information from the terminal device. And an unlocking method for executing the unlocking step.

  The present invention is a terminal device that can be connected by communication with a server device and a key opening / closing device that automatically opens and closes a key, and includes terminal identification information storage means for storing terminal identification information for identifying a terminal, and key identification information. When receiving the key identification information from the key opening / closing device and the key identification information receiving means, the server uses the terminal identification information stored in the terminal identification information storage means and the received key identification information as identification information. Sent when the identification information transmitting means for transmitting to the apparatus and the server apparatus collate the received identification information with the authority information stored in the server apparatus and determine that the authority to unlock the key is determined. The present invention relates to a terminal device including unlock information receiving means for receiving unlock information from a server device and unlock information transmitting means for transmitting the received unlock information to a key opening / closing device.

  According to the present invention, there is no security problem, and a right to open a key can be given to a third party by a simple method.

It is a block diagram which shows the structure of the electronic lock system which concerns on embodiment of this invention. It is a block diagram which shows the structure of the server apparatus which concerns on embodiment of this invention. It is a block diagram which shows the structure of the terminal device which concerns on embodiment of this invention, and a key opening / closing apparatus. It is a figure which shows the flowchart of the unlocking process which concerns on embodiment of this invention. It is a figure showing the authority information table which concerns on embodiment of this invention. It is a figure which shows the flowchart of the automatic starting process of the exclusive application which concerns on embodiment of this invention. It is a block diagram which shows the structure of the authorization system concerning embodiment of this invention. It is a figure which shows the flowchart of the authority provision process concerning embodiment of this invention.

  Embodiments of the present invention will be described below with reference to the drawings. The order of the processes constituting the flowchart described below is in no particular order as long as no contradiction or inconsistency occurs in the process contents.

  FIG. 1 is a block diagram showing a configuration of an electronic lock system according to an embodiment of the present invention. As illustrated, the electronic lock system includes a server device 1, a terminal device 3, a key opening / closing device 4, and a communication network 2. The server device 1 and the terminal device 3 are connected to the server device 1 via the communication network 2. The terminal device 3 does not have to be always connected to the server device 1 and may be connected if necessary. The terminal device 3 can communicate with the key opening / closing device 4 when approaching within a predetermined distance.

  FIG. 2 is a block diagram showing the configuration of the server device according to the embodiment of the present invention. The server device 1 includes a control unit 11, a RAM 12, a storage area 13, and a communication interface 14, each connected by an internal bus. The control unit 11 includes a CPU and a ROM, executes a program stored in a storage area 13 such as an HDD or an SSD, and controls the server device 1. Moreover, the control part 11 is provided with the internal timer which time-measures. The RAM 12 is a work area for the control unit 11.

  The storage area 13 stores authority information regarding the authority to unlock the key. The control unit 11 collates the identification information received from the terminal device 3 through the communication interface 14 and the authority information stored in the storage area 13 to determine whether the terminal device 3 has authority. When it is determined that the terminal device 3 has the authority, the communication interface 14 transmits unlocking information that permits unlocking by the key opening / closing device 4 to the terminal device 3.

  FIG. 3 is a block diagram showing configurations of the terminal device and the key opening / closing device according to the embodiment of the present invention. The terminal device 3 is a terminal device possessed by an agent who is temporarily authorized to unlock the key, and examples thereof include a mobile phone and a smartphone. The terminal device 3 includes a control unit 31, a RAM 32, a display unit 33, a storage 35, an input unit 36, and a communication interface 37, which are connected by an internal bus.

  The control unit 31 includes a CPU and a ROM. The control unit 31 executes a program stored in the storage 35 and controls the client device 3. In addition, the control unit 31 includes an internal timer that measures time. The RAM 32 is a work area for the control unit 31. The storage 35 is a storage area for storing programs and data. The control unit 31 reads a program and data necessary for unlocking the key opening / closing device 4 from the RAM 32 and performs processing.

  The display device 33 has a display screen 34. The control unit 31 outputs a drawing command and outputs a video signal for displaying an image on the display screen 34. The input unit 36 includes, for example, buttons and a touch panel display screen. Information input by the user from the input unit 36 is stored in the RAM 32, and the control unit 31 executes various arithmetic processes based on the input information. The communication interface 37 includes a Bluetooth (registered trademark) 37a, a communication antenna 37b, and a GPS 37c.

  The terminal device 3 can be connected to the communication network 2 via the communication antenna 37 b and transmits / receives information to / from the server device 1. For example, terminal identification information for identifying the terminal device 3 and key identification information received from the key opening / closing device 4 are transmitted to the server device 1, and unlocking information is received from the server device 1. Further, the terminal device 3 receives the key identification information from the key opening / closing device 4 by the Bluetooth (registered trademark) 37 a and transmits the unlocking information received from the server device 1 to the key opening / closing device 4. By adopting Bluetooth (registered trademark) as a communication method between the terminal device 3 and the key opening / closing device 4, the key opening / closing device 4 suppresses power consumption compared to the case where other communication methods are adopted, and the battery is installed. Can last longer. Therefore, the frequency of maintenance such as battery replacement can be reduced. Further, the position of the terminal device 3 can be specified by the GPS 37c.

  The key opening / closing device 4 may be installed on the door as the door key mechanism itself, or may be installed externally on a normal door with a key. Since the key opening / closing device 4 is not attached as a key of a new door but can be installed on an existing door to which a key is attached, the electronic lock system of the present invention can be introduced at a lower cost. it can. The key opening / closing device 4 is provided with key identification information that can be identified for each device.

  The key opening / closing device 4 includes a control device 41, a communication interface 42, a battery 43, and a key opening / closing unit 44, which are connected to each other by an internal bus. The control device 41 controls the key opening / closing by the key opening / closing unit 44, and outputs an unlocking execution request to the key opening / closing unit 44 by receiving the unlocking information from the terminal device 3. The communication interface 42 transmits key identification information for identifying the key opening / closing device 4 to the terminal device 3 and receives unlocking information from the terminal device 3. The battery 43 supplies power to the control device 41, the communication interface 42, and the key opening / closing unit 44. The key opening / closing unit 44 has a function of opening / closing a key.

  Next, the unlocking process in the electronic lock system of this invention is demonstrated. FIG. 4 is a diagram showing a flowchart of the unlocking process according to the embodiment of the present invention. An agent who is temporarily authorized to unlock the key possesses a terminal device that has been registered in advance as being the agent's terminal device, and communication with the key opening / closing device 4 and Bluetooth (registered trademark) is performed. The unlocking process is started by approaching the possible distance. Here, the communication between the terminal device 3 and the key opening / closing device 4 is performed by Bluetooth (registered trademark). However, the communication method is not limited to this, and can be selected as appropriate.

  First, key identification information that can uniquely identify the key opening / closing device 4 is transmitted from the key opening / closing device 4 to the terminal device 3 (step S1). When the key identification information is received by the terminal device 3 (step S2), the terminal identification information that can uniquely identify the terminal device 3 and the received key identification information are transmitted to the server device 1 as identification information. (Step S3).

  When the server device 1 receives the identification information (step S4), the authority information table set in the storage area 13 of the server device 1 is referred to, and the received terminal identification information and key identification information unlock the key. It is determined whether or not the user has the authority (step S5).

  FIG. 5 shows an authority information table according to the embodiment of the present invention. If the owner of the key temporarily allows the agent to unlock, the authority to allow the agent to be unlocked is granted by registering in advance to grant the authority. . The authority information table 50 stores the contents of authority granted to the agent.

  The authority information table 50 stores a key identification ID 52, a terminal ID 53, a start time 54, and an end time 55 in association with each authority number 51. The key identification ID 52 corresponds to the key identification information and can uniquely identify the key opening / closing device 4. The terminal ID 53 corresponds to the terminal identification information and can uniquely identify the terminal device 3. The start time 54 specifies the time when the effective period of the authority starts, and the end time 55 specifies the time when the effective period of the authority ends. For example, in the authority number “00001”, for the key opening / closing device 4 having “ABC001” as the key identification information, the terminal device 3 having “X01” as the terminal identification information is changed from 10 o'clock on October 1, 2014 to October 2014. We have the authority to unlock until 16:00 a day.

  In the determination in step S <b> 5, when both the key identification information and the terminal identification information received from the terminal device 3 match the key identification ID 52 and the terminal ID 53 with the same authority number 51, it is determined that the user has authority. If either the key identification information or the terminal identification information received from the terminal device 3 does not match the key identification ID 52 or the terminal ID 53, it is determined that the user does not have authority. Even when the terminal identification information and the key identification information received from the terminal device 3 match the key identification ID 52 and the terminal ID 53 of the same authority number 51, the time when the server device 1 received the identification information. Only when it is from the start time 54 to the end time 55, it is determined that the user has authority. When the server apparatus 1 receives the identification information before the start time 54 or after the end time 55, it is determined that the server apparatus 1 is not authorized. Thus, since the effective period can be set for the authority, it is only within the effective period that the authorized person can unlock the key, which is preferable from the viewpoint of security.

  If it is determined that the identification information received by server device 1 does not have the authority to unlock (NO in step S5), the process ends without being unlocked. On the other hand, when it is determined that the identification information received by the server device 1 has the authority for unlocking (YES in step S5), the unlocking information that permits unlocking by the key opening / closing device 4 Is transmitted to the terminal device 3 (step S6).

  When the unlock information transmitted from the server device 1 is received by the terminal device 3 (step S7), the unlock information is transmitted to the key opening / closing device 4 (step S8). When the unlocking information is received by the key opening / closing device 4 (step S9), the key opening / closing unit 44 opens the key (step S10).

  The key opening / closing device 4 can be installed on the indoor side of an existing door with a key. A thumb turn that opens and closes the lock is installed inside the door. By turning the thumb turn knob, the door can be locked and unlocked. A fixing tool that rotates in conjunction with a motor provided in the key opening / closing portion 44 is fixed to the thumb turn knob. When the key opening / closing device 4 receives the unlocking information in step S9, the motor is driven, and the rotation shaft of the motor rotates at a predetermined angle. In conjunction with the rotation of the rotation shaft, the fixing tool fixed to the thumb turn knob rotates, and as a result, the thumb turn knob rotates to unlock.

  Even after the unlocking is performed, the signal is transmitted from the key opening / closing device 4, and when the terminal device 3 receives the signal, the signal is transmitted from the terminal device 3 to the key opening / closing device 4. However, when the user enters the room and the strength of the signal received by the terminal device 3 becomes weaker than a predetermined strength due to the distance between the key opening / closing device 4 and the terminal device 3, the terminal The device 3 does not send a signal back to the key opening / closing device 4. When the key opening / closing device 4 does not detect a signal from the terminal device 3, the key opening / closing unit 44 locks the signal.

  When the unlocking information is transmitted from the terminal device 3 to the key opening / closing device 4, the transmission history can be managed as the unlocking history by the key opening / closing unit 44. From this unlocking history, it is possible to grasp the entry / exit history. When unlocking information is transmitted from the terminal device 3 to the key opening / closing device 4, the transmission history is transmitted to the server device 1 and managed by the server device 1.

  By the way, by using a dedicated application (hereinafter also referred to as a dedicated application) in the terminal device 3, after receiving the key identification information from the key opening / closing device 4 in step S2, the identification information is sent to the server device 1 in step S3. Is automatically executed after the unlocking information is received from the server device 1 in step S7 and until the unlocking information is transmitted to the key opening / closing device 4 in step S8. It becomes possible. The dedicated application is automatically activated when key identification information is received from the key opening / closing device 4. Therefore, unlocking can be performed without operating the terminal device 3.

  Next, a dedicated application automatic activation process in the terminal device 3 will be described. Whether or not to apply the automatic start processing of the dedicated application in the electronic lock system of the present invention is a matter that can be selected as appropriate, and the electronic lock system of the present invention can be designed without applying the automatic start processing. Is possible. FIG. 6 is a diagram showing a flowchart of automatic start processing of a dedicated application according to the embodiment of the present invention. First, key identification information is transmitted from the key opening / closing device 4 to the terminal device 3 (step S1), and the key identification information is received by the terminal device 3 (step S2). The transmission of the key identification information in step S1 is performed by periodically transmitting the key identification information at a frequency of, for example, once every few seconds, regardless of whether or not the terminal device 3 exists nearby. Since the transmission distance of the key identification information is limited, the transmitted key identification information is detected by the terminal device 3 when the terminal device 3 comes within a predetermined distance from the key opening / closing device 4, and the terminal device 3 The identification information is received.

  When the key identification information is received in step S2, it is determined whether or not the signal received as the key identification information has a predetermined strength or higher (step S21). If the signal strength is weaker than the predetermined strength (NO in step S21), the process ends without starting the dedicated application. The strength of the signal received as the key identification information is weaker than the predetermined strength because the distance between the key opening / closing device 4 and the terminal device 3 is large. Therefore, when the signal strength is weaker than the predetermined strength, the dedicated application is not activated and the identification information is not transmitted, so that the user having the terminal device 3 is not near the door. , Can prevent the key from opening.

  If the strength of the received signal is equal to or higher than the predetermined strength (YES in step S21), the special application is activated without any particular operation (step S22), the terminal identification information of terminal device 3 and the received key The identification information is transmitted as identification information to the server device 1 (step S3). After step S3, the processing from step S4 shown in FIG. 4 is continued. The terminal identification information can be registered in advance in a dedicated application.

  Next, in the electronic lock system of the present invention, the authority granting system when the client who is the key owner grants the authority to unlock the key to the agent who owns the terminal device 3 will be described. . In the authorization system, the operator who operates the electronic lock system cooperates with, for example, a housekeeping agency staff, an operator who dispatches babysitters and home helpers, etc., and the requester through a website operated by these dispatching operators In addition, the authority for unlocking the key can be given to a service provider (agent) such as a housekeeping agent.

  FIG. 7 is a block diagram showing the configuration of the authorization system according to the embodiment of the present invention. The authorization system includes a server device 1, a terminal device 3, a key opening / closing device 4, a requesting terminal device 6, and a requesting server device 7. The request terminal device 6 is connected to the request server device 7 via the communication network 2. The request server device 7 is connected to the server device 1 via a communication network. The request server device 7 does not need to be always connected to the request terminal device 6 and the server device 1, and may be connected as necessary.

  The server apparatus 1 is managed by a business operator who operates the electronic lock system, and executes authority management and authority assignment to the terminal apparatus 3 possessed by the agent. The requesting terminal device 6 is operated by a client who is the key owner. The request server device 7 is operated by, for example, a business operator dispatching a housekeeping agency staff, etc., and the requester requests from the request terminal device 6 via a website operated by these business operators. The server device 7 can be accessed.

  On the website, referring to age, gender, career, qualifications, etc., select the desired housekeeping agency staff etc. and enter the validity period etc. of the authority to unlock the key. Authority information for granting authority based on information input by the client (key identification ID of the key opening / closing device 4 owned by the client, terminal ID of the terminal device 3 owned by the selected agent, The validity period of the authority is transmitted from the requesting terminal device 7 to the server device 1. When the server device 1 receives the authority information, it is registered in the authority management table 50 of the server apparatus 1.

  In this example, the request server device 7 that receives a request for granting authority from the requester and the server device 1 that grants authority and manages authority are described as different server devices. It is also possible to adopt a configuration in which a request for granting authority from a person is accepted, the function of granting authority and managing authority is executed by one server device.

  Next, the authority grant process will be described. FIG. 8 is a diagram showing a flowchart of the authority grant processing according to the embodiment of the present invention. The requesting terminal device 6 transmits a request for agent information to the requesting server device 7 in order to select a desired agent such as a housekeeping agent staff (step S31). When the request server device 7 receives the agent information request (step S32), the agent information is transmitted to the request terminal device 6 (step S33). The agent information includes information such as name, gender, age, career, qualification, etc. for a plurality of agents.

  When the proxy information is received by the requesting terminal device 6 (step S34), the proxy is selected by the input operation of the requester (step S35). Next, input of authority information such as selection of the key opening / closing device 4 to which authority is given and input of the validity period of authority is input by the requester's input operation (step S36). Authority information such as the selected agent, the key opening / closing device to which authority is granted, and the validity period of the authority is transmitted from the requesting terminal apparatus 6 to the requesting server apparatus 7 (step S37). When the request server apparatus 7 receives the authority information (step S38), the request server apparatus 7 transmits the authority information to the server apparatus 1 (step S39).

  When the authority information is received by the server device 1 (step S40), the received authority information is registered in the authority information table 50 (step S41). When registering in the authority information table 50, an authority number 51 is newly added, and a key identification ID 52, a terminal ID 53, a start time 54, and an end time 55 are registered in association with the added authority number 51. . The terminal identification information of the terminal device 3 owned by the agent selected in step S35 is input as the terminal ID 53, and the key identification information of the key opening / closing device 4 selected in step S36 is input as the key identification ID 52 in step S36. The validity period of the authority thus registered is registered in the authority information table 50 as a start time 54 and an end time 55.

  The electronic lock system of the present invention can be used without being limited to its use as long as it is a door or door on which a key is installed. For example, the present invention can be applied to doors of condominiums, detached houses, commercial buildings, safe doors, and the like.

1 server device 11 control unit 12 RAM
DESCRIPTION OF SYMBOLS 13 Storage area 14 Communication interface 2 Communication network 3 Terminal device 31 Control part 32 RAM
DESCRIPTION OF SYMBOLS 33 Display part 34 Display screen 35 Storage 36 Input part 37 Communication interface 4 Key opening / closing apparatus 41 Control apparatus 42 Communication interface 43 Battery 44 Key opening / closing part 50 Authority information table 6 Request terminal apparatus 7 Request server apparatus

Claims (9)

An electronic lock system having a server device, a terminal device that can be connected to the server device by communication, and a key opening and closing device that can communicate with the terminal device and that automatically opens and closes a key,
The key opening and closing device
Key identification information storage means for storing key identification information for identifying the key opening and closing device;
Key identification information transmitting means for transmitting the stored key identification information to the terminal device,
The terminal device
Terminal identification information storage means for storing terminal identification information for identifying a terminal;
Key identification information receiving means for receiving key identification information from the key opening and closing device;
When the key identification information is received by the key identification information receiving means, the terminal identification information stored in the terminal identification information storage means and the received key identification information as identification information are provided as identification information transmitting means,
Server device
Authority storage means for storing authority information relating to the authority to unlock the key;
Identification information receiving means for receiving identification information from the terminal device;
Authority determination means for comparing the identification information received by the identification information receiving means with the authority information stored in the authority storage means to determine the presence or absence of authority of the terminal device;
A first unlocking information transmitting means for transmitting unlocking information for allowing unlocking to the terminal device when it is determined by the authority determining means to have the authority,
The terminal device
First unlocking information receiving means for receiving unlocking information from the server device;
A second unlocking information transmitting means for transmitting the received unlocking information to the key opening and closing device,
The key opening and closing device
Second unlocking information receiving means for receiving unlocking information from the terminal device;
An electronic lock system comprising: unlocking means for unlocking when unlocking information is received by the second unlocking information receiving means. The electronic lock system according to claim 1, wherein a validity period is set for the authority. The electronic lock system according to claim 1 or 2, wherein the communication between the terminal device and the key opening / closing device is communication by Bluetooth (registered trademark). The server device can communicate with other server devices,
The electronic lock system according to any one of claims 1 to 3, wherein the authority information stored in the authority storage means is information acquired by communication from another server device or information generated by the information. The electronic lock system according to any one of claims 1 to 4, wherein the authority information stored in the authority storage means can be set from another terminal device. The identification information transmitting unit transmits the identification information to the server device when the strength of the signal of the key identification information received by the key identification information receiving unit is equal to or higher than a predetermined strength. Electronic lock system. The electronic lock system according to any one of claims 1 to 6, wherein the key opening / closing device is installed in a facility to which a key is attached, and the unlocking means opens the key. An unlocking method executed in an electronic lock system having a server device, a terminal device that can be connected to the server device by communication, and a key opening / closing device that can communicate with the terminal device and that automatically opens and closes a key. ,
At the key opening and closing device,
Executing a step of transmitting key identification information for identifying the key opening / closing device stored in the first storage means to the terminal device;
In the terminal device,
Receiving key identification information from the key opening and closing device; and
When receiving the key identification information, the terminal identification information for identifying the terminal stored in the second storage means and the received key identification information as identification information are transmitted to the server device,
On the server device,
Receiving identification information from the terminal device; and
Collating the received identification information with the authority information regarding the authority to unlock the key stored in the third storage means, and determining the presence or absence of the authority of the terminal device;
When it is determined that the user has authority, the step of transmitting unlocking information for allowing unlocking to the terminal device,
In the terminal device,
Receiving unlocking information from the server device;
Executing the step of transmitting the received unlocking information to the key opening and closing device;
In the key opening and closing device,
Receiving unlocking information from the terminal device;
An unlocking method for executing unlocking step upon receiving unlocking information. A terminal device that can be connected by communication with a server device and a key opening / closing device that automatically opens and closes a key,
Terminal identification information storage means for storing terminal identification information for identifying a terminal;
Key identification information receiving means for receiving key identification information from the key opening and closing device;
When the key identification information is received by the key identification information receiving means, the terminal identification information stored in the terminal identification information storage means and the received key identification information as identification information are sent to the server device as identification information,
In the server device, the received identification information and the authority information stored in the server device are collated, and the unlock information transmitted when it is determined that the server has the authority to unlock the key is received from the server device. Unlocking information receiving means;
A terminal device comprising: unlock information transmitting means for transmitting received unlock information to a key opening / closing device.

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