JP2000057226A - Network system and maintenance method for technical service - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a network system and maintenance method for technical service which enables customer engineers to share maintenance information and then can improve and homogenize the capabilities of the customer engineers. SOLUTION: The network system for technical service consists of a portable terminal 1 that a customer engineer carries, a computer 2 for maintenance information which stores information on actual results of maintenance and provides the information for the portable terminal 1, and an input terminal 3 for inputting the actual results of maintenance to the computer 2 for maintenance information. The computer 2 for maintenance information receives the actual results of maintenance from the input terminal 3 and an information request signal from the portable terminal 1, stores the information on the actual results of maintenance, and specifies requested information according to the information request signal, thereby taking the information out of a host storage means. Then the taken-out information is transmitted to the portable terminal 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a technical service network system and a maintenance method. More specifically, multiple customer engineers can share maintenance information,
As a result, it is an object of the present invention to provide a technical service network system and a maintenance method capable of measuring the sophistication and homogeneity of the capabilities of customer engineers.

[0002]

2. Description of the Related Art Conventionally, maintenance work has been carried out in which customer engineers are installed at a plurality of points and contracted for maintenance of a large number of various devices over a wide area nationwide.

[0003]

However, although a plurality of customer engineers accumulate know-how individually through work, they rarely disclose their know-how. Therefore, even if one customer engineer has already experienced a failure of another device of the same type, if the other customer engineer responds, it may be difficult to respond because the customer engineer has not acquired the know-how. Was.

[0004] In addition, the same customer engineer rarely maintains one device consistently. If the customer engineer for a specific device changes, the maintenance history and know-how of the device up to that point are sufficiently taken over. There was something that could not be done. And even when such handovers are taking place, it is virtually impossible to carry all the information at all times, so that unplanned equipment needs urgent maintenance, and the customer engineer on the go In the case of suddenly heading for maintenance, there was a case where the maintenance history and know-how of the equipment were not at hand and sufficient maintenance could not be performed.

[0005] Each customer engineer is located at sales offices all over the country. In addition, customer engineers at sales offices in major cities, where there are many similar types of equipment to be maintained, can obtain a great deal of information on maintenance performance through ordinary operations. Since the number of types of equipment to be used is small and many types, it is not possible to obtain information on a large number of maintenance results in ordinary work, and there is a case where the ability of maintenance varies depending on the region.

[0006] On the other hand, information sharing systems for sharing know-how have existed, but these information sharing systems require input, update, and maintenance of the information.
Personnel costs are incurred because specialized information update personnel were involved. Therefore, when the target device storing the maintenance information becomes old, it has become a burden to retain information update personnel. On the other hand, if the number of information updating personnel is reduced, the frequency of updating the information is reduced, and the accumulated information becomes obsolete rapidly, so that the information sharing system is no longer used.

The present invention solves such a problem. A plurality of customer engineers can share maintenance information.
An object of the present invention is to provide a technical service network system and a maintenance method capable of achieving homogenization.

[0008]

According to the first aspect of the present invention,
A mobile terminal carried by the customer engineer, a maintenance information computer for storing information on the maintenance results and providing necessary information to the mobile terminal, and an input terminal for inputting the information on the maintenance results to the maintenance information computer Wherein the maintenance information computer receives the maintenance result information from the input terminal and an information request signal from the mobile terminal directly or via another device. A host receiving unit, a host storage unit for storing the received maintenance result information, and information required based on the information request signal is specified; Host search means for retrieving requested information; and information retrieved by the host search means from the host storage means directly or through another device. A host transmission unit for transmitting to the serial portable terminal, a technical service network system comprising: a.

Here, the "maintenance record information" is information on the contents of maintenance work performed by the customer engineer in the past, and includes, for example, the date and time of maintenance, the name of the customer engineer, the client name, and the maintenance. It contains the name of the model that was performed, the error code, the content of the defect, the content of the treatment, and the like. The "customer engineer" is a person who performs maintenance of the device. In the present invention, the portable terminal may also serve as the input terminal.

The invention according to claim 2 is the technical service network system according to claim 1, wherein the portable terminal is a terminal input means for inputting information to be transmitted as the information request signal; Terminal transmitting means for transmitting the information request signal including the information input through the input means to the maintenance information computer, terminal receiving means for receiving information from the maintenance information computer, and displaying the received information Terminal display means.

According to a third aspect of the present invention, there is provided the technical service network system according to the first or second aspect,
The portable terminal has a terminal receiving means capable of receiving an incoming call from outside. According to a fourth aspect of the present invention, there is provided the network system for technical service according to the third aspect, wherein the portable terminal includes a terminal incoming notification unit that emits a voice when an external incoming call is received.

According to a fifth aspect of the present invention, there is provided the technical service network system according to any one of the first to fourth aspects, wherein the portable terminal includes a terminal sounding means capable of emitting a voice, and an electric sound generating means. A terminal microphone capable of converting the signal into a signal, and making a call through a telephone line.

The invention according to claim 6 is the technical service network system according to any one of claims 1 to 5, wherein the portable terminal includes mobile communication means capable of performing mobile communication. Transmission of the information request signal to the maintenance information computer and transmission of information from the maintenance information computer to the portable terminal are performed using a mobile communication network.

Here, "mobile communication" is communication between moving vehicles, ships, people, and the like. The “mobile communication network” is a network system that realizes mobile communication. As systems for “mobile communication”, for example, so-called “mobile phones”, “mobile phones”,
“Simplified mobile phones (so-called PHS, Personal)
Handyphone system) "
The “mobile communication” here is not limited to these. Hereinafter, the same applies. This "mobile communication means"
It can also serve as “terminal receiving means”, “terminal receiving means” and “terminal transmitting means”.

According to a seventh aspect of the present invention, there is provided a portable terminal carried by a customer engineer, and a maintenance information computer for storing maintenance manual information of equipment maintained by the customer engineer and providing information to the portable terminal. , A network system for technical services comprising:
The maintenance information computer includes a host storage unit that stores the maintenance manual information, a host reception unit that receives an information request signal from the mobile terminal directly or via another device, A host search unit for extracting the requested information from the maintenance manual information stored in the host storage unit; and directly extracting the information retrieved from the host storage unit by the host search unit. Or a host transmitting means for transmitting to the portable terminal via another device.

Here, the "maintenance manual information" is information on the contents of the maintenance manual of each device to be maintained, and includes, for example, information such as a fault tree and an error code table of each device.

The invention according to claim 8 is the network system for technical service according to claim 7, wherein the portable terminal is a terminal input means for inputting information to be transmitted as the information request signal; Terminal transmitting means for transmitting the information request signal including the information input through the input means to the maintenance information computer, terminal receiving means for receiving information from the maintenance information computer, and displaying the received information Terminal display means.

The invention according to claim 9 is the technical service network system according to claim 7 or 8,
The mobile terminal includes mobile communication means capable of performing mobile communication, and transmits the information request signal to the maintenance information computer and transmits information from the maintenance information computer to the mobile terminal. The transmission is performed using a mobile communication network.

According to a tenth aspect of the present invention, a customer engineer carries a portable terminal, and the customer engineer
After the maintenance work, the maintenance result information is input to the maintenance information computer through the input terminal, and the maintenance information computer accumulates the maintenance result information and notifies the customer engineer or another customer engineer of new maintenance information. Prior to the operation or during a new maintenance operation, the mobile terminal extracts and uses the required information from the past maintenance results information stored in the maintenance information computer from the maintenance information computer by the mobile terminal. The maintenance method is characterized by the following.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. Embodiment 1 (1) Configuration of Technical Service Network System As shown in FIG. 1, this technical service network system has mobile terminals 1a, 1b, 1c,. , Collectively referred to as "mobile terminal 1"), a maintenance information computer 2 installed at the head office, storing maintenance information and transmitting necessary information to the mobile terminal 1, and installed at the head office and branch offices. An input terminal 3a for inputting maintenance information to the maintenance information computer 2,
3b,... (Hereinafter, collectively referred to as “input terminal 3”).

As shown in FIG. 2, the maintenance information computer 2 has a CPU (Central Pr
processing Unit, central processing unit) 21;
A hard disk 22 for recording information and a CRT display (Cathode Ray Tube) for displaying information
e display monitor) 23 and a keyboard 24 for a user to input information. Then, the maintenance information computer 2
Is an ISDN (Integrated Service)
TA (Term) for performing communication through Digital Network (Total Service / Digital Network)
internal Adapter) 25, DSU (Digit)
al Service Unit / line connection device) 26
It also has.

The maintenance information computer 2 stores maintenance manual information of each device to be maintained in the hard disk 22.
It is recorded in. Then, from the mobile terminal 1, a public network,
When receiving the information request signal through the DSU 26 and the TA 25, the CPU 21 searches the maintenance manual information for the requested information from the information in the hard disk 22, and
It transmits to the outside through TA25 and DSU26. The maintenance manual information can be searched by the equipment to be maintained, the parts of those equipment, the details of the failure, etc.
In addition, the information is accumulated so that it can be searched by an error code generated by the device to be maintained. When updating such information, an update operation is performed by the keyboard 24 or other input means.

The computer for maintenance information 2 also records information on the results of maintenance performed in the past on the hard disk 22. When receiving a signal requesting information from outside through the DSU 26 and the TA 25, the CPU 21
The requested information is searched for from the information in the hard disk 22 among the information of the maintenance results, and TA25, DSU
26 to the outside. Maintenance information can also be searched according to the equipment to be maintained, the parts of those equipment, the details of the failure, etc. Also, the name of the model that performed maintenance, the error code issued by the equipment to be maintained, It is stored so that it can be searched by the contents, the corresponding contents, and the like, or by the name of the client or the maintenance person in which those devices are installed.

On the other hand, as shown in FIG.
CPU 11 for performing arithmetic processing, hard disk 12 for recording information, and liquid crystal display 13 for displaying information
A keyboard 14 for a user to input information;
It is a portable computer provided with.

The portable terminal 1 has voice communication using PHS and PIAFS (PHS Internet A).
A mobile communication unit 15 capable of performing data communication by using a cccess forum standard is provided. The mobile communication means 15 includes not only a device for performing information communication, but also a microphone for performing a call,
Speakers are also provided. In addition, the portable terminal 1 has an incoming notification sound source 16 that emits a voice for attracting the user's attention.
It has. The incoming notification sound source 16 is transmitted from the mobile terminal 1 to the maintenance information computer 2 through the mobile communication means 15.
Speaks when receiving information from.

Each customer engineer carries these portable terminals 1a, 1b, 1c,... When necessary, for example, before or during maintenance of the equipment. The portable terminal 1 is operated by the keyboard 14, and maintenance manual information and information on past maintenance results are extracted from the maintenance information computer 2 through the mobile communication means 15. The information is fetched from the mobile communication means 15 through the public line network, stored in the hard disk 12, and displayed on the liquid crystal display 13.
The CPU 11 controls and processes the flow of the information. In addition, each customer engineer has a mobile terminal 1a, 1
b, 1c,…, 24 hours, 365 days
Regardless of where you are, you can retrieve maintenance manual information and past maintenance performance information.

The maintenance information computer 2 also manages the mail of the customer engineer. These mails are exchanged through a public line network, and are taken into the maintenance information computer 2 through the DSU 26 and the TA 25. When receiving the e-mail addressed to the customer engineer, the maintenance information computer 2 receives the TA25, DS
The user accesses the portable terminal 1 carried by the customer engineer via U26 and the public line network, and transmits the mail. The mobile terminal 1 that has received the mail emits a sound by the incoming notification sound source 16 to call attention of the customer engineer.

On the other hand, the maintenance manual information and the maintenance result information to the maintenance information computer 2 are input to the input terminal 3a,
3b,. The input terminal 3 includes a CPU for performing arithmetic processing, a hard disk for recording information,
A computer including a CRT display for displaying information and a keyboard for a user to input information. The input terminal 3 also has TAs and DSUs for performing communication by ISDN.

The maintenance manual information and the maintenance result information are input to the input terminal 3 through the keyboard, temporarily stored in the hard disk, and then transmitted to the maintenance information computer 2 through the TA and DSU. The maintenance manual information includes a fault tree of a maintenance device, an error code table, and the like. In addition, information on maintenance performance includes:
The date and time of maintenance, the name of the customer engineer, the name of the client, the name of the model that performed maintenance, an error code, a problem, and a measure are included. Further, the information on the maintenance record can be input to the maintenance information computer 2 by the mobile terminal 1 as in the case of the input terminal 3.

(2) Example of Operation of Network System for Technical Service An example of operation of the network system for technical service will be described below. The customer engineer accesses the computer 2 for maintenance information at the head office from the terminal of the branch office at the office on the day before the day of scheduled maintenance of the predetermined equipment, and browses the latest maintenance work contents of the equipment to be maintained. If the user wants to know more details, he / she can send an e-mail to the person in charge of the maintenance indicated in the browse information to have the information sent.
In addition, when the latest version of the firmware and the program of the device to be maintained is created, it can be downloaded from the maintenance information computer 2.

Since the customer engineer carries the portable terminal 1 even when he is away from the office, he can obtain the above information through the portable terminal 1 when he needs it. In addition, the mobile terminal 1 can browse the e-mail replying to the inquiry.

Further, even when the customer engineer is at the site where the equipment to be maintained is installed, if the customer needs urgent maintenance at another place, the customer engineer manager at the branch office can send a mail. Can call a customer engineer at the site. The portable terminal 1 carried by the customer engineer is provided with an incoming notification sound source 16, and when a mail is received, the incoming notification sound source 16 sounds a sound and the customer engineer carrying the portable terminal 1. Inform When the incoming notification sound source 16 sounds, the customer engineer can read the e-mail, and then contact the administrator by e-mail or by PHS call to maintain other equipment that needs urgent maintenance. You can also head.

Then, the customer engineer who goes to the maintenance of the unscheduled equipment urgently requiring the maintenance accesses the maintenance information computer 2 at the head office through the portable terminal 1, and obtains the maintenance manual and the maintenance manual of the equipment to be maintained. Information on recent maintenance results can be viewed. Therefore, even if the customer engineer has not been in charge of the model or has never experienced the problem, the customer engineer can respond based on the obtained information.

After the work is completed, the customer engineer creates a business report at the branch office, transmits the content to the maintenance information computer 2 at the head office through the input terminal 3 and the portable terminal 1 in the branch office as business performance information, and inputs it. . Mobile terminal
1 has a keyboard, so customer engineers
It is also possible to create and send a business report by using the mobile terminal 1 while on the go. The business performance information transmitted and input to the maintenance information computer 2 includes the date and time of maintenance, the name of the customer engineer, the name of the client, the name of the model that performed maintenance, the error code, the content of the defect, and the content of the response. include. The work result information is stored in the maintenance information computer 2 and can be browsed by subsequent access from the mobile terminal 1 or a terminal in a branch office.

The equipment to be maintained includes a station service system, a financial system, a distribution system, an ATM (cash dispenser), an ECR (electronic cash register), a P system / par system (parking lot system), and a traffic control system. Although a system and the like are mentioned, any device may be used.

(3) Effects of the present embodiment According to the technical service network system of the present embodiment, all customer engineers can access the know-how equally, and the know-how can be shared over time and distance. Become. Further, since the customer engineers in each region can access the know-how equally, it is possible to eliminate the difference in accumulated know-how depending on the region, and it is not necessary to gather the customer engineers in the region and perform maintenance training. In addition, since information unique to each maintenance device can be obtained prior to maintenance, by efficiently allocating customer engineers with high levels of universal maintenance skills, a small number of customer engineers can perform various types of maintenance. A wide range of devices can be supported.

Further, in the network system for technical service of this embodiment, the customer engineer inputs the contents of the maintenance work into the maintenance information computer 2 and updates the information, so that there is no need for specialized information update personnel. In addition, the maintenance information can always be kept up to date. And
In the network system for technical service of the present embodiment,
Since the person who inputs information to the maintenance information computer 2 is also a person who uses the information, the style of the information to be input becomes naturally easy to use.

Further, not only a customer engineer but also a maintenance equipment design person accesses the maintenance information computer 2 through a terminal and browses information on the maintenance results of each maintenance equipment, so that the contents of the defect can be determined for the next equipment. It can be reflected in the design. Then, not only the design department, but also the quality assurance department and the sales department, each department is organically integrated by feeding back the field data accumulated in the technical service. Further, even when exporting the equipment to be maintained abroad, if the manual and the information on the contents of the maintenance work stored in the maintenance information computer 2 are to be translated into the language of the country of the export destination and used. It is possible to employ customer engineers locally and have those customer engineers use the maintenance know-how they have obtained up to that point.

(4) Others The present invention is not limited to the embodiment described above, but may be variously modified within the scope of the present invention depending on the purpose and application. For example, the mobile terminal is not limited to a device having a keyboard or a hard disk, but may be a device having another input device such as a touch panel instead of the keyboard, and another storage device such as a flash memory instead of the hard disk. Can be provided.

Further, the maintenance information computer 2 may be a distributed processing system, and as shown in FIG. 4, may be composed of a plurality of computers respectively arranged at a central laboratory, a production factory, and a maintenance service headquarters. . The mobile terminal 1 and the input terminal 3 may access the maintenance information computer 2 through various lines as shown in FIG.

[0041]

According to the network system for technical service according to the first aspect and the maintenance method according to the tenth aspect,
The maintenance information computer accumulates information on the maintenance results, and the customer engineer can extract necessary information from the mobile terminal. For this reason, even if the customer engineer in charge of a specific maintenance device changes, the maintenance history and know-how of the device up to that time can be effectively inherited based on the information on the maintenance results.

Further, by bringing the portable terminal to the customer engineer of each sales office, the customer engineers of each sales office can share the history and know-how of the maintenance, so that the maintenance information available to each customer engineer can be used. Quality and uniformity. And
Since all customer engineers can share the history and know-how of maintenance of the equipment and use it from a remote location using a mobile terminal, it is necessary to have the responsibility for maintaining the equipment in order to respond to a sudden failure Even when a customer engineer does not perform maintenance, the customer engineer can obtain necessary information and refer to the maintenance.

Further, if the customer engineer inputs the information of the maintenance result to the maintenance information computer from the input terminal as in the maintenance method according to the tenth aspect of the present invention, a specialized information update staff is required to update the maintenance information. The information is always kept up-to-date without having to secure a large amount of information. Further, for example, if the mobile terminal also serves as the input terminal, the customer engineer can input the information of the maintenance result from a location, and the information can be updated more flexibly.

In the technical service network system according to the second aspect, since the portable terminal includes the terminal input means and the terminal transmitting means, the person carrying the portable terminal needs what kind of maintenance record information. Information is input by the terminal input means, and an information request signal including the information is
The information can be transmitted from the terminal transmitting means to the computer for maintenance information. Since the portable terminal includes the terminal receiving means and the terminal display means, the information on the maintenance record transmitted from the maintenance information computer is received by the terminal receiving means, and the information is displayed on the terminal display means. it can.

In the network system for technical service according to the third aspect, the portable terminal is provided with terminal receiving means capable of receiving an incoming call from outside, so that the person carrying the portable terminal can use the portable terminal for maintenance information. It is possible to receive information from the maintenance information computer not only when the computer is accessed but also in a steady state.

In the technical service network system according to the fourth aspect, the portable terminal is provided with terminal incoming notification means for emitting a voice when an external incoming call is received. , You can access that information quickly.

According to a fifth aspect of the present invention, there is provided an emergency service network system, wherein the portable terminal includes a terminal sounding means capable of emitting a voice and a terminal microphone capable of converting the voice into an electric signal. In some cases, a portable terminal can make a call through a telephone line.

Since the technical service network system according to the sixth aspect utilizes a mobile communication network, a wired connection is not required for exchanging information, and an information request signal can be transmitted to a maintenance information computer and transmitted. When and where to send information from the maintenance information computer to the mobile terminal. Therefore, the customer engineer can obtain the required maintenance information at the required location at the required time, and the equipment can be quickly maintained. In addition, existing mobile communication facilities can be used, and system construction is easy.

According to the technical service network system of the present invention, the customer engineer can obtain necessary information from the maintenance manual information from the maintenance information computer by using the portable terminal. For this reason, even if a customer engineer who has not been in charge of the maintenance of the equipment or a customer engineer who has not dealt with the type of failure performs the maintenance, the customer engineer carries the manual. Necessary information can be obtained in a similar environment and can be used as a reference for maintenance.

In the technical service network system according to the present invention, since the portable terminal includes the terminal input means and the terminal transmitting means, the person carrying the portable terminal needs what kind of maintenance manual information. The information on whether or not to do so can be input by the terminal input means, and an information request signal including the information can be transmitted from the terminal transmitting means to the computer for maintenance information. Since the mobile terminal includes the terminal receiving means and the terminal display means, the maintenance manual information transmitted from the maintenance information computer can be received by the terminal receiving means, and can be displayed by the terminal display means. .

Since the technical service network system according to the ninth aspect utilizes a mobile communication network, a wired connection is not required for exchanging information, and an information request signal can be transmitted to the maintenance information computer and transmitted. When and where to send information from the maintenance information computer to the mobile terminal. Therefore, the customer engineer can obtain necessary maintenance manual information at a required place at a required time, and quick maintenance of the equipment is possible. In addition, existing mobile communication facilities can be used, and system construction is easy.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of a technical service network system.

FIG. 2 is an explanatory diagram of a maintenance information computer.

FIG. 3 is an explanatory diagram of a portable terminal.

FIG. 4 is an explanatory diagram of a maintenance information computer according to another aspect.

FIG. 5 is an explanatory diagram of a connection state according to another mode of the portable terminal and the input terminal.

[Explanation of symbols]

1, 1a, 1b, 1c; portable terminal, 11; CPU, 1
2; hard disk, 13; liquid crystal display, 14;
Keyboard, 15; mobile communication means, 16; incoming call notification sound source, 2; computer for maintenance information, 21; CPU, 2
2; hard disk, 23; CRT display, 2
4; keyboard; 25; TA, 26; DSU, 3, 3
a, 3b; input terminal.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) H04M 3/00 H04B 7/26 E 11/08 H04L 11/00 310B

Claims (10)

[Claims] 1. A portable terminal carried by a customer engineer, a maintenance information computer for accumulating maintenance result information and providing necessary information to the portable terminal, and the maintenance result information stored in the maintenance information computer. An input terminal for inputting the information, and the maintenance information computer, wherein the maintenance information computer receives the maintenance result information from the input terminal and an information request signal from the mobile terminal directly or by another device. Via a host receiving means, a host storage means for storing the received maintenance record information, and information required based on the information request signal, and the maintenance information stored in the host storage means. A host search unit that retrieves the requested information from the result information; and directly or other information that the host retrieval unit retrieves from the host storage unit. Network system for a technical service, characterized in that it comprises, a host transmission unit for transmitting to the mobile terminal via the device. 2. The maintenance information computer according to claim 1, wherein the portable terminal is a terminal input unit for inputting information to be transmitted as the information request signal, and the information request signal including the information input through the terminal input unit is transmitted to the maintenance information computer. 2. The technical service network system according to claim 1, further comprising: a terminal transmitting means for transmitting, a terminal receiving means for receiving information from the maintenance information computer, and a terminal display means for displaying the received information. 3. The technical service network system according to claim 1, wherein the portable terminal includes terminal receiving means capable of receiving an external incoming call. 4. The technical service network system according to claim 3, wherein said portable terminal includes terminal incoming notification means for emitting a voice when an external incoming call is received. 5. The mobile terminal according to claim 1, further comprising a terminal sounding means capable of emitting a voice, and a terminal microphone capable of converting the voice into an electric signal, and capable of making a call through a telephone line. 5. The technical service network system according to any one of claims 1 to 4. 6. The mobile terminal includes mobile communication means capable of performing mobile communication, transmitting the information request signal to the maintenance information computer and transmitting the information request signal from the maintenance information computer to the mobile terminal. 6. The technical service network system according to claim 1, wherein the transmission of the information is performed using a mobile communication network. 7. A technical service comprising a mobile terminal carried by a customer engineer and a maintenance information computer storing maintenance manual information of equipment maintained by the customer engineer and providing information to the mobile terminal. A network system, wherein the maintenance information computer is a host storage unit that stores the maintenance manual information, and a host reception unit that receives an information request signal from the mobile terminal directly or through another device, A host search unit for specifying information requested based on the information request signal and extracting the requested information from the maintenance manual information stored in the host storage unit; Host transmission means for transmitting the information extracted from the portable terminal to the portable terminal directly or via another device. Network system for a technical service, wherein Rukoto. 8. The maintenance terminal according to claim 1, wherein the portable terminal is a terminal input unit for inputting information to be transmitted as the information request signal, and the information request signal including the information input through the terminal input unit is transmitted to the maintenance information computer. 8. The technical service network system according to claim 7, further comprising: a terminal transmitting means for transmitting, a terminal receiving means for receiving information from the maintenance information computer, and a terminal display means for displaying the received information. 9. The mobile terminal includes mobile communication means capable of performing mobile communication, and transmits the information request signal to the maintenance information computer and transmits the mobile information from the maintenance information computer to the mobile terminal. 9. The technical service network system according to claim 7, wherein the transmission of the information to the terminal is performed using a mobile communication network. 10. The customer engineer carries a portable terminal, and after the maintenance work, causes the customer engineer to input the maintenance result information to a maintenance information computer through an input terminal. Accumulate the information of the customer engineer or other customer engineers,
Prior to a new maintenance operation or during a new maintenance operation, the mobile terminal causes the maintenance information computer to extract necessary information from the past maintenance performance information accumulated in the maintenance information computer. A maintenance method characterized by being used.