JP2013070179A - Drawing management server and drawing management program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform an electronic authorization of drawing data at any given timing using actual seal impression data and provide the authorized drawing data with a high degree of evidentiality.SOLUTION: A terminal 3 requests a drawing management server 2 for drawing-data and displays, on a screen, design drawing data 4 overlapped with actual seal impression data that is already stamped, the seal impression data contained in design-drawing attribute information 6. A stamper specifies a stamping position on the screen to authorize the drawing data by means of electronic stamping. As authorization is carried out, the actual seal impression data is obtained to be added to additional attribute information 61 on the drawing management server 2. Then, post-addition design-drawing attribute information 6 and the design drawing data 4 are paired and signed, and further, a time stamp is given by requesting a time stamp server 8. The electronic signature and the time stamp are handled as signature information to update the additional attribute information 61.

Description

  The present invention relates to a drawing management server and a drawing management program. For example, the present invention relates to a method for digitizing drawings such as architectural design drawings and storing and managing them after approval by electronic seals of related parties.

For example, in a construction / construction business, when a design drawing is generally completed, it is printed on a paper medium, sequentially confirmed by a predetermined approver, and then approved and stored. .
On the other hand, there is a case where the drawing is digitized and stored. In this case as well, in order to obtain confirmation by the approver, an electronic stamping action is required for the digitized drawing.
For example, Patent Document 1 proposes a document management system having a document management server and an image input / output device connected to each other via a network. An approver presses an approval mark on a paper document, and then the paper document Is read by the image forming apparatus, and the imprint image of the approval position obtained by the reading is transmitted to the authentication information management server to confirm the approval.

However, in the technology described in Patent Document 1, there is no guarantee against electronic tampering with respect to the scanned seal imprint or the document to which the seal imprint is added.
On the other hand, workflows for settlement and approval of digitized documents according to a predetermined decision route have become widespread, but imprints cannot be displayed and the order of settlement is determined, so any Approval tailored to the actual situation, such as sometimes approving, could not be performed.

JP 2011-39613 A

  An object of the present invention is to electronically approve drawing data at an arbitrary timing using seal imprint actual data, and to give high evidence to the approved drawing data.

(1) According to the first aspect of the present invention, the drawing data storage means for storing the drawing data composed of the drawing data and the attribute information thereof, and the imprint memory for storing the approver's imprint actual data for the drawing data. Means, drawing data transmitting means for transmitting designated drawing data in response to a request from the terminal, approval information receiving means for receiving approval information for the transmitted drawing data from the terminal, and the received approval information The seal stamp acquisition means for acquiring the seal stamp actual data of the approver corresponding to the seal stamp storage section, the seal stamp information including the acquired seal stamp actual data and the display position in the figure, and the attribute information of the approved drawing data. Attribute adding means for adding to the attribute information, electronic signature creating means for creating an electronic signature for the drawing data in which the seal stamp information is added to the attribute information, and the creation A time stamp acquisition means for acquiring a time stamp for the electronic signature from a time stamp server; and a drawing data update means for updating the drawing data by adding the electronic signature and the time stamp to the attribute information. A drawing management server is provided.
(2) In the invention according to claim 2, the imprint storage means stores the approver's personal information for the imprint actual data, the personal information and the hash value of the imprint actual data, and the imprint acquisition means further includes: 2. The drawing according to claim 1, wherein a hash value corresponding to the seal imprint actual data is acquired, and the attribute adding unit includes the acquired hash value in the seal stamp information and adds the hash value to the attribute information. Provide a management server.
(3) The invention according to claim 3 provides the drawing management server according to claim 1 or 2, wherein the data of the figure is in a PDF format or a TIFF format.
(4) In the invention according to claim 4, the attribute information is in an XML format, and the drawing management server according to claim 1, 2, or 3 is provided.
(5) The invention according to claim 5, further comprising a correction acquisition unit that corrects the drawing data from a terminal that has transmitted the drawing data, and acquires correction information created separately from the drawing data. 5. The drawing management server according to claim 1, wherein the acquired correction information is added to the attribute information of the transmitted drawing data. provide.
(6) The invention described in claim 6 is characterized by comprising notifying means for notifying the approver of the updated drawing data that the drawing data has been updated by the drawing data updating means. A drawing management server according to any one of claims 1 to 5 is provided.
(7) In the invention described in claim 7, in response to a request from the terminal, the designated drawing data is acquired from the drawing data storage means for storing drawing data composed of the drawing data and its attribute information. A drawing data transmission function for transmitting the approval data, an approval information receiving function for receiving approval information for the transmitted drawing data from the terminal, and an approver actual data corresponding to the received approval information for the approval of the drawing data. An imprint acquisition function acquired from the imprint storage means for storing a person's imprint actual data, and the imprint information including the acquired imprint actual data and the display position in the figure is added to the attribute information of the approved drawing data An attribute adding function, an electronic signature creating function for creating an electronic signature for the drawing data in which the seal stamp information is added to the attribute information, and the created electronic signature A computer implements a time stamp acquisition function for acquiring a time stamp for a signature from a time stamp server, and a drawing data update function for updating the drawing data by adding the electronic signature and the time stamp to the attribute information. A drawing management program is provided.

  According to the present invention, the drawing data is composed of the drawing data and the attribute information thereof, the approval information is added to the attribute information every time the drawing is approved, and the electronic signature and the time of the drawing data to which the attribute information is added. Since the drawing data is updated by further adding a stamp to the attribute information, the approved drawing data can have high evidence.

It is a figure for demonstrating the structure of an electronic stamping system. It is the figure which showed the structure of the drawing management server. It is the figure which showed the structure of the drawing data memorize | stored in drawing DB. It is the figure which showed the structure of the imprint information memorize | stored in imprint information DB. It is the figure which showed the structure of the terminal. It is the flowchart which showed the procedure of the stamping of drawing by an electronic stamping system. It is a figure showing the display state of the design drawing displayed on the display device of a terminal.

(1) Outline of Embodiment As shown in FIG. 1, the drawing management system 1 stores and manages a document such as a drawing to be electronically stamped in a predetermined format (for example, PDF / A format, TIFF format). The drawing management server 2 and the terminals 3A, 3B, 3C... For acquiring, displaying the drawing to be stamped from the drawing management server 2 and displaying them and executing the stamping process by the approver (hereinafter, unless each terminal is particularly distinguished, It is simply referred to as a terminal 3. The same applies to other reference numerals), and a time stamp server 8 for giving a time stamp in response to a request from the drawing management server 2.

The drawing management server 2 functions as a drawing data storage unit and includes a drawing DB (database) 272 that stores drawing data to be approved by stamping. Further, the drawing management server 2 functions as an imprint storage unit, and stores imprint actual data (imprint image) of each stamper (approver), information on the stamper, and their hash values for each stamper. An information DB 273 is provided.
The drawing data is composed of blueprint data 4 (xxx.pdf format) and blueprint attribute information 6 (.xml format). The blueprint attribute information 6 includes basic attribute information 60 and seal stamp actual data of the stamper. It includes additional attribute information 61A, 61B,... Added each time it is stamped.
Here, the design drawing data 4 functions as diagram data, and the design drawing attribute information 6 functions as attribute information.

  The terminal 3 requests drawing data from the drawing management server 2 and displays the design drawing data 4 and the stamped actual data included in the drawing drawing attribute information 6 on the screen. For example, when the stamper A has already been stamped, the seal imprint data of the stamper A is displayed on the design drawing data 4 on the screen of the terminal 3B. In this state, the stamper B of the terminal 3B designates the stamping position on the screen and approves the drawing data by electronic stamping.

In the drawing management server 2, when the approval of the drawing data is performed by each terminal 3, the imprint actual data is acquired from the imprint information DB 273 for each approval, and additional attribute information for each terminal 3 is created and added. Then, the design drawing attribute information 6 and the design drawing data 4 after the addition are signed as a set, and the time stamp server 8 is requested to give a time stamp. The electronic signature and time stamp are included in the additional attribute information 61 as signature information to update the drawing data.
Further, the terminal 3 can correct the design drawing data 4 on a screen displaying the drawing data. The correction is not correction of the design drawing data 4 itself, but correction information indicating the contents of addition and correction is created and transmitted to the drawing management server 2. At this time, the terminal 3 also performs an electronic seal for approving the correction. The drawing management server 2 includes the correction information in the additional attribute information 61 and updates the design drawing attribute information 6.

By providing the design drawing data 4 and the design drawing attribute information 6 as a set and giving an electronic signature and a time stamp, it is possible to prevent tampering and obtain stamper information that cannot be obtained only by the imprint image.
In addition, the personality can be improved by hashing the imprint actual data and the stamper information.

In order to link the imprint image information (imprint imprint data) and the personal information of the stamper (authorizer) (stamper information such as title, date of birth, name, company name, etc.) It is possible to improve the identity by including the hash value after including the hash value and using the hash value as the seal stamp information.
In addition, by adding a seal image and a hash value as attribute information to the approved drawing data, and adding an electronic signature and a time stamp, evidence can be ensured by preventing falsification.

(2) Details of Embodiment FIG. 2 is a diagram showing the configuration of the drawing management server 2.
The drawing management server 2 includes a CPU 21, ROM 22, RAM 23, communication device 24, display device 25, input device 26, and storage device 27.
The CPU 21 is a central processing unit that performs information processing according to various programs such as the drawing management program 271 stored in the storage device 27 and controls each part of the drawing management server 2.
The ROM 22 is a read-only memory that stores basic programs and parameters for operating the drawing management server 2.
The RAM 23 is a readable / writable memory that provides a working memory when the CPU 21 performs a drawing management process or the like.

The communication device 24 is an interface that connects the drawing management server 2 to a network such as the Internet.
The drawing management server 2 transmits, to the terminal 3, drawing data that is a required stamping target (approval target) via the communication device 24, and receives approval information and drawing correction information from the terminal 3. To do.
The drawing management server 2 is connected to the time stamp server 8 via the communication device 24, and issues and acquires a time stamp for the set of the design drawing data 4 and the design drawing attribute information 6 after the signature.

The display device 25 includes a display device such as a liquid crystal display, for example, and displays a design drawing obtained by superimposing seal imprint data from the drawing data.
The input device 26 includes an input device such as a keyboard and a mouse, for example, and receives an operation from an operator.

The storage device 27 is composed of a large-capacity storage medium such as a hard disk, and stores drawing data including a drawing management program 271 for managing and updating drawing data, design drawing data 4 and design drawing attribute information 6. A drawing DB (database) 272 to be stored, an imprint information DB 273 for storing information on the stamper and imprint actual data, and the like are stored.
The drawing management program 271 is a program that is executed by the CPU 21 to perform processing such as saving drawing data, updating design drawing attribute information 6 by stamping, signing, and adding a time stamp.

FIG. 3 is a diagram for explaining the configuration of drawing data stored in the drawing DB 272 of the drawing management server 2. The drawing DB 272 stores a plurality of drawing data having different drawing contents.
The drawing data of this embodiment will be described for various design drawings such as design drawings of houses and apartment buildings, high-rise building designs, and plant construction design drawings. The present invention can be widely applied to various drawings such as drawings and assembly drawings of machines.

The drawing data is composed of blueprint data 4 and blueprint attribute information 6.
The design drawing data 4 is stored and managed by a drawing file name (drawing number) and an extension A. The design drawing data 4 of the present embodiment is stored in the PDF format, and the extension is “.pdf”.
The design drawing attribute information 6 includes basic attribute information 60 and additional attribute information 61 that is sequentially added and updated based on information transmitted from the terminal 3 by approval or correction of drawing data.
The blueprint attribute information 6 is stored and managed by the same file name as the blueprint data 4 related to the blueprint attribute information 6 and an extension B different from the blueprint data 4. In the design drawing attribute information 6 of the present embodiment, the attribute information is stored in an XML format in which attribute information can be sequentially added, and the extension is “.xml”.

As described above, the design drawing data 4 and the design drawing attribute information 6 are associated with each other by giving the same file name, and the two are distinguished by the extension.
Note that this is an example, and it is not necessary for the file names of the design drawing data 4 and the design drawing attribute information 6 to be the same, as long as they are associated with each other by some method.

The design drawing data 4 is obtained by importing a design drawing including a drawing frame and an imprint display frame created by drawing software such as CAD as PDF data, and has logical contents that can be handled by so-called CAD. Absent.
That is, when only the design drawing data 4 is displayed on the screen, as shown in FIG. 7 (a), the design drawing 41, the drawing frame 42, the title column 43 in which the creator, the creation date, etc. are displayed, the stamp display frame 44 is displayed. The blueprint data 4 itself is not changed or updated as the original drawing, and subsequent approval or correction is added to the blueprint attribute information 6.

The blueprint attribute information 6 is created when the blueprint data 4 is imported as PDF format data from a blueprint created by drawing software or the like.
As shown in FIG. 3, the blueprint attribute information 6 includes basic attribute information 60 created when the blueprint data 4 is taken in, and each subsequent drawing data approval from each terminal 3. Additional attribute information 61A, 61B, 61C,. Hereinafter, when the additional attribute information is not particularly distinguished, it is simply referred to as additional attribute information 61.
The additional attribute information 61 is composed of seal stamp information, correction information, and signature information.
The seal imprint information includes a stamp date and time, a stamp position, ID information, seal stamp actual data, and a hash value. The stamp date and time, the stamp position, and the ID information are acquired from the approval information transmitted from the terminal 3 by the stamp by the stamper. On the other hand, the seal stamp actual data and the hash value are acquired from the seal stamp information DB 273 (described later) based on the ID information included in the approval information.
The date and time of stamping is the time when the stamper confirmed the stamping at the terminal 3.
The stamp position is coordinate information indicating the display position of the seal imprint data on the design drawing (original drawing) displayed on the screen of the terminal 3.
The ID information is identification information of the stamper. This ID information is linking information for knowing information (name, job title, etc.) on the stamper (authorizer), seal stamp actual data, and the like.

The correction information of the additional attribute information 61 is not information for changing the design drawing data 4 itself, but is correction content for displaying the design drawing data 4 so as to overlap it. For example, a line drawing (bits) input by handwriting on the display screen Map data, GIF data, JPEG data, etc.).
When only the approval by the stamp is performed and the design drawing correction process is not performed, only the imprint information is added to the additional attribute information 61, and the correction information is not added. In addition, any modification of the blueprints may be performed by any holder who has the qualification to stamp, but only those who have the authority to perform a specific correction among those who have the qualification to seal. It may be possible to make corrections in a limited manner.

The signature information is composed of an electronic signature and a time stamp.
Specifically, the drawing management server 2 holds the blueprint data 4 and the blueprint attribute information 6 to which approval information or correction information (including a seal) transmitted from the terminal 3 is added. It is composed of an electronic signature performed with its own private key stored in the storage device 27 and a time stamp issued to the electronic signature by requesting the time stamp server 8.
The signature information is included in the additional attribute information 61 in which the corresponding seal stamp information is stored, so that the content of the new design drawing attribute information 6 is finally determined and updated.

FIG. 4 is a diagram for explaining the configuration of the seal stamp information stored in the seal stamp information DB 273.
As shown in FIG. 4, the seal imprint information includes a number (No), ID information, name, title, actual seal data, and hash value, and is created for each stamp qualification holder.
The number is a management number.
The ID information is identification information of the stamper and is a storage target in the additional attribute information 61 of the design drawing attribute information 6.
The name and title are the name of the stamper and the title at the time of stamping. The position will be changed as appropriate in accordance with the change of the person's position.
The seal imprint data is an imprint image obtained by converting the seal stamp of the stamper into data. For example, the seal imprint is scanned with a scanner or photographed with a digital camera in the form of bitmap data, GIF data, JPEG data, or the like. Saved. The seal imprint data of this embodiment is saved in JPEG format (.jpg), but can be saved in other formats.
The hash value is a fixed length value generated from the ID information, name, post, and seal imprint data by a hash function (one-way function).

FIG. 5 is a diagram showing the configuration of the terminal 3.
The terminal 3 includes a CPU 31, a ROM 32, a RAM 33, a communication device 34, a display device 35, an input device 36, a storage device 37, a clock (not shown) that measures the stamp date and time, and the like.
If the terminal 3 has the configuration of the CPU 31 or the like, it can be a notebook personal computer 3A, a personal computer 3B, a tablet PC 3C (see FIG. 1), a mobile phone, a smartphone (multifunctional mobile phone), or the like. Either can be used.

The CPU 31 is a central processing unit that performs information processing according to various programs and controls each unit of the terminal 3.
The ROM 32 is a read-only memory that stores basic programs and parameters for operating the terminal 3.
For example, the RAM 33 is a readable / writable memory that provides a working memory when the CPU 31 displays drawing data, accepts a stamping process, or accepts a change of drawing data by handwriting.

The communication device 34 is an interface that connects the terminal 3 to a network such as the Internet.
The terminal 3 can receive drawing data to be approved from the drawing management server 2 via the communication device 34, and can send approval information and correction information by stamping to the drawing management server 2.

The display device 35 includes a display device such as a liquid crystal display, for example, and displays the design drawing data 4 and the seal imprint actual data based on the design drawing attribute information 6 superimposed on the drawing data, or by handwritten by the operator. Displays handwriting and operation icons.
The input device 36 includes a touch panel and accepts handwritten input from an operator.
The touch panel and the display screen are associated with each other by coordinate axes, and the terminal 3 designates a stamped part based on the seal imprint actual data or drives a pixel set to a coordinate value of a part touched on the touch panel in the correction process. To display handwritten handwriting.
An operator can specify a stamped part, input a handwriting, or operate the terminal 3 by touching the touch panel with a fingertip or a stylus pen.

  The storage device 37 includes, for example, a large-capacity storage medium such as a hard disk or an EEPROM (Electrically Erasable Programmable ROM), displays drawing data, displays a seal imprint, and accepts correction by handwriting. For example, a drawing approval program is stored.

Next, the time stamp server 8 (not shown) will be described.
The time stamp server 8 is a server that performs date and time certification for digital data.
The time stamp server 8 has a clock device whose time is accurately adjusted and its own secret key.
Upon receiving the administrator's electronic signature from the drawing management server 2, the time stamp server 8 generates a time stamp by giving the date and time of the clock device and signing it with a private key, and transmits it to the drawing management server 2. To do.
Since the time stamp can be decrypted only with the public key corresponding to the private key of the time stamp server 8, by verifying the time stamp with the public key, it can be confirmed that the date / time is not falsified. By not being falsified, it can be proved that the target (electronic signature) of the time stamp surely existed at the date and time.

Next, a process of electronic stamping of a drawing by the drawing management system 1 configured as described above will be described.
FIG. 6 is a flowchart for explaining the procedure of drawing stamping by the drawing management system 1.
FIG. 7 shows the display state of the design drawing displayed on the display device 35 of the terminal 3.
The following processing is performed for each terminal 3 by the CPU 31 of the terminal 3 according to the drawing approval program, and for the drawing management server 2 by the CPU 21 according to the drawing management program.

First, when a stamper (approver) starts a drawing approval program of the terminal 3, the terminal 3 accesses the drawing management server 2 via the communication device 34 and receives authentication from the drawing management server 2. This authentication is performed using ID information and a password, and the drawing management server 2 authenticates and specifies the approver depending on whether the ID information and password transmitted from the terminal 3 match those already registered. If the authentication is successful, the drawing management server 2 accepts access from the terminal 3.
When the terminal 3 requests a design drawing to be approved by designating a drawing file name (drawing number) (step 10), the drawing management server 2 draws the drawing data of the designated drawing file name. (Design drawing data 4 and design drawing attribute information 6) are read from the drawing DB 272 and transmitted to the terminal 3 (step 11: drawing data transmitting means).

  In addition, instead of the approver specifying and requesting the drawing data from the terminal 3, the drawing management server 2 uses the ID information of the authenticated approver to obtain the drawing data that needs to be approved (unapproved drawing data). If there is unapproved drawing data, it may be transmitted to the terminal 3. In this case, if there is no unapproved drawing data, a message such as “There is no drawing to be approved” is transmitted to the terminal 3.

When the drawing data is transmitted from the drawing management server 2, the terminal 3 displays the design drawing included in the received drawing data on the display device 35 (step 12).
That is, the terminal 3 superimposes the design drawing data 4 as the original drawing from the drawing data and the imprint actual data of the imprint information if there is each additional attribute information 61 (see FIG. 3) of the design drawing attribute information 6. indicate. The seal stamp actual data is displayed at the stamp position specified by the seal stamp information.
When there is no additional attribute information 61, that is, in a state where no one has yet approved (imprinted), the display device 35 of the terminal 3 has, as shown in FIG. A design drawing 41 is displayed and, for example, a drawing frame 42, a title column 43, and an imprint display frame 44 are displayed. Existence (display) other than the design drawing 41 differs depending on the state of the original drawing when the design drawing data 4 is taken.

On the other hand, when the seal by the approver A has been completed and the additional attribute information 61A exists in the design drawing attribute information 6, the terminal 3 reads the seal stamp actual data and the stamp position from the stamp information and superimposes them on the design drawing data 4 The actual seal data is displayed at the designated stamp position.
As a result, as shown in FIG. 7B, the seal imprint data of the approver A is displayed on the imprint display frame 44 of the design drawing data 4 on the screen of the display device 35.

Next, the terminal 3 determines whether or not there is a request for correction processing for the design drawing (step 13). Whether there is a request for correction processing is determined by, for example, whether or not a subroutine for correction is called (for example, selection of a function key for correction).
If there is a request for correction processing (step 13; Y), the terminal 3 starts a correction subroutine (step 14). Then, when the approver writes the correction portion on the design drawing data 4 displayed by the input device 36 such as a fingertip, a stylus pen, or a mouse pointer, the terminal 3 displays the handwriting (trajectory) on the screen. .
For example, a window frame is described on the display screen shown in FIG. 7B so that a window is added to the design drawing of the house. Then, the terminal 3 displays the corrected handwriting 611B corresponding to the handwriting such as the mouse pointer on the screen as shown in FIG. 7D.
When the end of drawing correction by the approver is input by the above operation, the terminal 3 stores the handwriting information and the correction end date and time in the RAM 33 as correction information, and ends the correction process.

After the correction process is completed or when there is no request for the correction process (step 13; N), the terminal 3 performs a stamp process (step 15).
That is, the terminal 3 displays the seal imprint data of the approver on the screen on which the design drawing is displayed.
This display position is an initially set stamp position when no stamping process has been performed from the terminal 3, and stores the previously stamped position when the stamping process has already been performed. It is stored in the device 37 and the seal is displayed at the storage position.

The approver confirms the display position of the displayed imprint, and if it is different, grabs (clicks) the displayed imprint with a mouse cursor or the like and moves (drags) the imprint to the desired position. The position where the mouse button is released becomes the stamp position.
For example, FIG. 7 (c) or FIG. 7 (d) shows a state in which the design drawing is displayed in step 12 and the approver B moves the seal stamp to determine the stamp position from the state of FIG. 7 (b). That is, the approver B has moved his / her own imprint 610B displayed on the screen to the imprint display frame 44 adjacent to the imprint 610A already stamped by the approver A.
FIG. 7D shows the screen after the approver B has moved and confirmed the seal after the correct handwriting 611B of the window frame has been added and corrected by the correction process, as described above.

In addition, the terminal 3 performs a display (for example, OK and cancellation display) for confirming to the approver whether or not the seal position is acceptable. If it is acceptable, the terminal 3 is confirmed at the seal position and is not good. For example, it is possible to monitor the movement of the imprint again.
When the stamp position is confirmed, the terminal 3 stores the stamp position and the stamp date / time (the stamp position date / time) in the RAM 33 as approval information.
Further, the terminal 3 sends the approval information stored in the RAM 33 or, if correction is made, the approval information and the correction information to the drawing management server 2 and ends the stamping process (step 15).
In addition, when transmitting the approval information and the correction information to the drawing management server 2, the ID information of the approver may be sent together. Further, in the same manner as in step 10, the authorizer may be authenticated again.

Note that the imprint displayed in this stamping process (step 15) may be the same as the imprint actual data added to the additional attribute information 61 of the design drawing attribute information 6 or a different imprint. Good.
For example, when displaying the same imprint, the drawing management server 2 transmits the imprint actual data together with the drawing data in step 11, whereby the terminal 3 acquires the imprint actual data and displays it as the imprint. The acquired seal stamp actual data is stored in the storage device 37 in association with the approver's ID information and / or password. Then, when there is no seal imprint data that matches the ID information and / or password input at the time of the authentication performed in step 10, it is requested to the drawing management server 2, and if present, it is saved without request. Use the completed seal imprint data. However, it may be obtained from the drawing management server 2 every time in step 11 without saving the seal imprint actual data.

Further, when using a different seal, a temporary seal may be stored for each approver (for each ID information) and the temporary seal may be used.
Furthermore, a seal-type icon as seal information common to all users may be stored in advance, and this seal-type icon may be displayed as a seal.

When the stamping process at the terminal 3 is completed (step 15) and the approval information is transmitted, the drawing management server 2 receives the approval information (approval information receiving means) and identifies the ID information of the approver (identified in step 11). ) Is acquired (see FIG. 3) (imprint acquisition means), and additional attribute information 61 is created (attribute addition means) (step 16).
That is, the drawing management server 2 reads the seal stamp actual data and the hash value corresponding to the ID information from the seal stamp information DB 273. Then, the stamp position and the stamp date / time included in the approval information, the ID information, the seal stamp actual data, and the hash value are added to the design drawing attribute information 6 as additional attribute information 61.
When the correction information is transmitted together with the approval information from the terminal 3, the drawing management server 2 further adds additional attribute information 61 to which the correction information is added to the design drawing attribute information 6.

Next, the drawing management server 2 performs an electronic signature on the set of the design drawing data 4 and the design drawing attribute information 6 to which the seal stamp information and the correction information are added by the approval using its own private key (step 17). : Electronic signature creation means).
Further, the drawing management server 2 requests the time stamp server to acquire a time stamp for the electronic signature (step 18: time stamp acquisition means).
Then, the drawing management server 2 adds the electronic signature and time stamp as signature information to the additional attribute information 61, thereby changing the final design drawing attribute information 6 (step 19: drawing data updating means).
Thereby, the drawing management server 2 completes the update of the drawing data (upgrading of the drawing data).

Then, the drawing management server 2 transmits a version change message notifying that the version has been changed by updating the drawing data to all concerned parties (step 20).
For example, the drawing management server 2 sends a message mail such as “The drawing version has changed. Please download the latest drawing” to the registered parties.
Here, the parties to whom the message is transmitted correspond to all persons to be approved (whether approved or not approved) for the drawing. It is also possible to register drawing creators and other drawing managers as related parties.
Further, it may be transmitted only to the approver who has already approved the drawing.
Further, only when the correction information is received, it may be transmitted to the parties concerned including the case of the modification.

  The terminal 3 that has received the version change message from the drawing management server 2 accesses the drawing management server 2 in the same manner as in step 10 by the operation of the approver, receives the changed drawing data, and displays it on the display device 35. Confirm and end the process.

As described above, according to the drawing management system 1 of the present embodiment, the following effects can be obtained.
(1) The drawing data is composed of the blueprint data 4 and blueprint attribute information 6, and when the correction is made by the stamp or when the drawing is corrected, the blueprint attribute information 6 is added by adding the additional attribute information 61. Therefore, it is possible to superimpose and display the seal imprint data by the approval without changing the design drawing data 4 as the original drawing.
(2) The drawing data updated by the approval or correction by the seal is attached to the set of the design drawing data 4 and the design drawing attribute information 6 every time it is updated, and each update is performed. It is possible to prevent falsification and secure evidence for each of the drawing data.
(3) Every time approval or correction by stamping is performed, additional attribute information 61 is created and signature information by electronic signature and time stamp is added each time. Can leave. Also, by designating the design date by designating the design date by designating the date and time and excluding the additional attribute information including the stamp date and time after the date and time, it is possible to confirm who has approved the date and time.
(4) The imprinting actual data can be handled by the bitmap method, and can be expressed with a more realistic quality of the imprinting level.
(5) In addition to the seal imprint data, the title, date of birth, name, company name, etc. can be recorded in the seal imprint information, so that it is possible to obtain stamper information that cannot be obtained only by the displayed seal image. It is possible to manage the application of seal imprint information with higher personality.
For example, when two seal imprint data with the same “Suzuki” are displayed, it is difficult to distinguish and specify both from the difference in the seal impression, but the blueprint attribute information corresponding to the seal imprint data By identifying the ID information from 6 and confirming with the drawing management server 2, it is possible to confirm the correct name and title of the approver.
(6) The identity can be improved by hashing the seal imprint data and including the hash value in the seal information. In the present embodiment, since not only the seal imprint actual data but also information including the name and job title is hashed, it is possible to avoid falsification including the personal information.
(7) On the paper drawing on which the design drawing is printed, the imprint actual data can be imprinted at an arbitrary position of the imprint display frame 44 with the same feeling as pushing a specific seal.
(8) Unlike workflows for settlement and approval of digitized documents according to a predetermined decision route, approval by stamping can be performed in any order.

Although the embodiment of the present invention has been described above, the present invention is not limited to this, and various modifications are possible.
For example, in the embodiment described above, the case where the design drawing data 4 is stored in the PDF format has been described, but other formats such as the TIFF format may be used.
In the “long-term storage method of digitized documents” JIS Z 6017 (2006), it is assumed that the document is stored in PDF (exactly PDF / A) or TIFF. Therefore, in this embodiment, it is preferable to handle these two types. .
For example, design drawing data (extension “.dwg” format, etc.) created by a CAD application is converted into PDF and taken into drawing data as design drawing data 4 in the present embodiment.
However, both the PDF format and the TIFF format are possible for the operation and storage of the drawing data. However, when the drawing data is stored for a long time, the multi-layer function is required, so the drawings that are operated and stored in the TIFF format. All data is stored in PDF format for a long time with a PDF header.

  In the embodiment described above, as described with reference to FIG. 7A, the case where the drawing frame 42, the title column 43, and the seal impression display frame 44 are displayed by the design drawing data 4 has been described. Alternatively, any two or more may be defined in the basic attribute information 60 of the design drawing attribute information 6.

In the embodiment described above, the case where the approver designates the stamp position of the seal stamp has been described. However, the drawing management server 2 may determine the stamp position.
That is, since the drawing management server 2 identifies and recognizes who is the approver with the ID information by the authentication performed in step 10, the drawing management server 2 searches the imprint information DB 273 for the post of the approver corresponding to the ID information, You may make it determine in the stamp position predetermined according to the post.
In this way, the drawing management server 2 automatically determines the “stamp position” of the additional attribute information 61, so that even when a stamp by an approver that was not scheduled is required, Additional approval can be made by shifting (changing) the “seal position” of the additional attribute information 61.
For example, it is assumed that the imprint actual data approved by three persons a (plain employee), b (person in charge), and c (department manager) are displayed in the imprint display frame 44 in order from the right. In this state, when there is a sudden change in schedule and the approval of d (section manager) is required, the drawing management server 2 displays “seal” so that the display order of imprints is in the order of a → b → d → c from the right side. Change "Position".

1 Electronic seal system 2 Drawing management server 21 CPU
22 ROM
23 RAM
24 communication device 25 display device 26 input device 27 storage device 271 drawing management program 271 drawing DB
273 Imprint Information DB
3 Terminal 31 CPU
32 ROM
33 RAM
34 communication device 35 display device 36 input device 37 storage device 4 design drawing data 41 design drawing 42 drawing frame 43 title block 44 imprint display frame 6 design drawing attribute information 60 basic attribute information 61 additional attribute information 610A, 610B imprint actual data 611B correction Handwriting 8 Time stamp server

Claims (7)

Drawing data storage means for storing drawing data composed of drawing data and attribute information thereof;
Imprint storage means for storing imprint data of the approver for the drawing data;
Drawing data transmission means for transmitting designated drawing data in response to a request from the terminal;
Approval information receiving means for receiving approval information for the transmitted drawing data from the terminal;
Imprint acquisition means for acquiring the imprint actual data of the approver corresponding to the received approval information from the imprint storage means;
Attribute addition means for adding seal information including the acquired seal stamp actual data and the display position in the figure to the attribute information of the approved drawing data;
An electronic signature creating means for creating an electronic signature for the drawing data in which the seal stamp information is added to the attribute information;
Time stamp acquisition means for acquiring a time stamp for the created electronic signature from a time stamp server;
Drawing data update means for updating the drawing data by adding the electronic signature and time stamp to the attribute information;
A drawing management server comprising: The imprint storage means stores the personal information of the approver for the imprint actual data and the hash value of the personal information and imprint actual data;
The imprint acquisition means further acquires a hash value corresponding to the imprint actual data,
The attribute adding means includes the acquired hash value in seal information and adds it to the attribute information.
The drawing management server according to claim 1.   The drawing management server according to claim 1, wherein the data of the figure is in a PDF format or a TIFF format.   The drawing management server according to claim 1, wherein the attribute information is in an XML format. From the terminal that transmitted the drawing data, the drawing data is corrected, the correction acquisition means for acquiring correction information created separately from the drawing data,
The attribute adding means adds the acquired correction information to the attribute information of the transmitted drawing data.
The drawing management server according to any one of claims 1 to 4, wherein the drawing management server. Notifying means for notifying the approver of the updated drawing data that the drawing data has been updated by the drawing data updating means;
The drawing management server according to any one of claims 1 to 5, further comprising: In response to a request from the terminal, drawing data transmission function for acquiring and transmitting designated drawing data from drawing data storage means for storing drawing data composed of the drawing data and its attribute information;
An approval information receiving function for receiving approval information for the transmitted drawing data from the terminal;
Imprint acquisition function for acquiring the imprint actual data of the approver corresponding to the received approval information from the imprint storage means for storing the approver imprint actual data for the drawing data;
An attribute addition function for adding the acquired imprint actual data and the imprint information including the display position in the figure to the attribute information of the approved drawing data;
An electronic signature creating function for creating an electronic signature for the drawing data in which the seal stamp information is added to the attribute information;
A time stamp acquisition function for acquiring a time stamp for the created electronic signature from a time stamp server;
A drawing data update function for updating the drawing data by adding the electronic signature and the time stamp to the attribute information;
A drawing management program for realizing a computer.

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