JP3226688B2 - Time recorder with time tampering check function - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used in the technical field of a time clock for managing employment (time management) based on the date and time of an internal clock. It relates to a time recorder with a time tampering check function that is devised so that when time data is changed and entered at a different time from the original time, the fact of this time tampering can be accurately checked and recorded in the record. is there.

[0002]

2. Description of the Related Art In a conventional time recorder, a key switch (key hole) for mode switching is provided on an airframe as disclosed in, for example, Japanese Patent Application Laid-Open No. 4-10093, and a special key is inserted into this key switch. When the internal clock is set to the time setting mode, the internal clock can be set and operated.Therefore, only the administrator with a dedicated key can change the date and time of the internal clock, and cannot be changed by ordinary people. ing.

For those who have forgotten to enter the time required for attendance management, a key switch for mode switching is provided in the same manner as the above-mentioned time recorder, as seen in Japanese Utility Model Application Laid-Open No. 63-155573. It is configured such that the administrator can input the correction data without changing the time of the internal clock by inputting the time of entering and leaving the work with numerical keys in accordance with the data correction operation mode using a dedicated key. .

[0004] However, the problem is that a general person steals a special key possessed by an administrator to create a key, changes the time of an internal clock arbitrarily when inputting daily attendance data, and incorrectly inputs a time card. In addition, for those who have been fraudulent by the administrator himself, for example, who are late and did not intentionally enter a work time, the time of the internal clock is not delayed without using the data correction operation mode. After that, there was also a case where a person's time card was inserted and the work time was incorrectly entered.

[0005] As disclosed in Japanese Patent Application Laid-Open No. 1-150993, it is conceivable to prevent the key from being illegally used by changing the time of an internal clock only after inputting a password. However, if the security code is not provided to the manager, the correction of the error of the internal clock cannot be left to the manager, which is troublesome for the manager and significantly increases the burden. If this password is given to the administrator, unauthorized input by the administrator described above is expected. In any case, it is impossible to completely prevent unauthorized correction of the internal clock. Was desired.

Accordingly, the present applicant has filed a Japanese Patent Application No. 5-238.
According to the application of No. 865, the difference between the current date and time of the internal clock and the absolute date and time is stored in the data memory as the date and time difference.
When the date and time of the internal clock is changed, an absolute date and time is obtained from the date and time before the change and the date and time stored in the data memory, and the difference between the date and time after the change and this absolute date and time is calculated as a new date and time difference. And stored in the above data memory as
Each time attendance data is input, the date and time difference stored in the data memory is checked, and if the absolute value of the date and time difference is equal to or greater than a preset reference time, a record of time tampering is recorded. A time management device with a time tampering check function has been developed.

[0007]

However, the time management device with a time falsification check function according to the above-mentioned application has a configuration in which time falsification is considered only when the absolute value of the date and time difference is equal to or greater than a preset reference time. Therefore, time tampering less than the reference time (for example, less than 5 minutes) cannot be detected.

Therefore, for example, when detecting time tampering with a time difference of two minutes, it is necessary to set the reference time to two minutes. However, the smaller the reference time is set, the more difficult it is to distinguish the error correction of the internal clock from the error correction of the internal clock. Was.

[0009] On the other hand, considering work management using a time clock, if you do not come to work by the start time,
Even one minute late is treated as late. This is not a matter of how long the late is, but the important point is whether or not it is late. The same is true for early retirement.

In the case of overtime, overtime pay is generally paid every unit time (for example, every 30 minutes) according to work rules. Therefore, for example, the closing time is 17: 0
0: 17:29 in case of overtime permission in 30 minute units
The difference between leaving at 17:30 and leaving at 30:30 is a large difference between overtime and non-overtime benefits, even if the time difference is 1 minute. It is.

Further, when considering the employment management of hourly-paid employees such as part-timers, this wage system does not have to be late or leave early, so it is acceptable to go to and from work at any time. The system is such that wages are increased and paid each time the working hours reach a certain unit time (for example, one hour unit). As in the case of overtime, the working hours are reduced to the unit time. Depending on whether or not it is reached, the paid wages will change.

[0012] Therefore, it can be said that it is necessary to detect even a minute time tampering of several minutes with respect to a time clock that supports employment management. However, other time management devices, such as a parking fee payment machine and a game hall usage fee payment machine, do not have the above-described problem. In other words, there is a grace time (grace time) function, even if you park or use the game for a few minutes to several tens of minutes, even if it is time to originally pay an additional fee, if it is within the grace time, The system is operated in such a way that no extra charge is taken, so that even if the time is falsified for a few minutes, there is no profit for the fraudster and no loss for the manager.

In summary, the technical problems of the present invention are:
It is an object of the present invention to provide a time recorder capable of accurately checking minute time tampering of a few minutes in employment management and recording it in a record.

[0014]

Means taken by the present invention to solve the above-mentioned technical problems are as follows.

While the difference between the current date and time of the internal clock and the absolute date and time is stored in the data memory as a date and time difference, when the date and time of the internal clock is changed, the date and time before the change and the date and time stored in the data memory are stored. Find the absolute date and time from the time difference, and
The difference between the changed date and time and this absolute date and time is stored in the above data memory as a new date and time difference, and the time difference stored in this data memory is checked each time the attendance data is input, and the date and time difference is checked. In the case of a time recorder configured to leave a record of time tampering when the absolute value of

(1) Reference time setting means for automatically resetting the reference time according to a reference time table stored in a memory in accordance with the estimated cumulative error of the internal clock, and changing the time of the internal clock Every time the change is made, the last date of the change stored in the data memory is rewritten to the absolute date and time at that time. A correction corresponding date rewriting means for rewriting the correction corresponding date also stored in the data memory to the change final date at that time each time the data is corrected, and the last date of these changes stored in the data memory The absolute value of the date and time difference is less than the reference time set by the reference time setting means, and The date difference between the end date and the current absolute date is equal to or greater than a predetermined number of days, and the absolute value of the accumulated error of the internal clock is equal to or greater than the number of days expected to be equal to or greater than one minute, and the date has already elapsed from the correction corresponding date. Only if
Date and time difference correction means for correcting the date and time difference stored in the data memory to zero.

(2) When the absolute value of the date and time difference stored in the data memory is equal to or greater than the reference time set by the reference time setting means, the date and time difference correction means may be used for a predetermined period of time. Hold the time difference data, then
To have a correction function to correct

(3) Each time the attendance data is input, the date and time difference stored in the data memory is checked, and if the date and time difference is not 0 but less than the reference time, the date and time of the attendance data and the absolute date and time are determined. If the absolute value of the new date and time difference is less than the reference time when the date and time of the internal clock is changed again, the new date and time difference is temporarily stored. Is compared with the date and time difference between the input date and time and the absolute date and time, if the polarity of the time difference between these two date and time differences is different from each other, or the new date and time difference is absolutely different with respect to the absolute value of the time difference. Only in the case of small, falsification suspicion history list storage means for filing the above input date and time and the absolute date and time temporarily stored in the data memory as falsification data in the data memory,
It is necessary to print out or display the history list of alleged tampering, or to have a tampering history list output means for transmitting to the host computer.

While the difference between the current date and time of the internal clock and the absolute date and time is stored in the data memory as the date and time difference, when the date and time of the internal clock is changed, the date and time before the change and the date stored in the data memory are stored. Find the absolute date and time from the time difference, and
In a time recorder having a function of storing the difference between the changed date and time and the absolute date and time as a new date and time difference in the data memory,

(4) Each time the attendance data is input, the date and time difference stored in the data memory is checked. If the date and time difference is not zero, the input and output date and time and the absolute date and time of the attendance data are stored in the data memory. When the date and time of the internal clock is changed again, when the date difference portion of the new date and time difference is 0, the new date and time and the input date and time temporarily stored in the data memory are used. The date and time difference between the absolute date and time is checked, and the first condition is that the date difference part of the latter date and time difference is not 0. The date difference part of the latter date and time difference is 0, and these two date and time differences The second condition is that the + and-polarities are different from each other with respect to the time difference portion of the above, or that the new date and time difference is smaller with respect to the absolute value of the time difference portion. If one is satisfied As long as the input date and time and the absolute date and time temporarily stored in the data memory are falsified as falsification data, the falsification suspected history list storage means, and a history list of these suspected falsifications are printed out or displayed, Alternatively, it is provided with a falsification history list output means for transmitting to the host computer.

Here, the absolute date and time means a date and time according to the world date and time, and the present invention has an internal clock indicating the absolute date and time separately from the internal clock for data input. Instead of the current date and time of the internal clock for entering time data and the date and time difference stored in the data memory (date and time difference = current date and time of the internal clock−absolute date and time). Therefore, the current absolute date and absolute time are calculated by the following equations. Absolute date = current date of internal clock-date difference of date and time difference Absolute time = current time of internal clock-time difference of date and time difference

[0022]

The above means operates as follows.

According to the means described in the above (1), the reference time for time tampering detection is automatically changed, for example, in minutes in accordance with the estimated cumulative error of the internal clock. If there is, it is possible to determine with higher accuracy whether the error is correction of the accumulated error or time falsification.

Further, according to the means described in the above (1), even if minute time tampering is performed for several minutes and the time of the internal clock is not returned to the original correct time, the time is not changed. A grace period is provided so that the incorrect date and time difference of the minute is not immediately corrected to 0 and reflected on the absolute date and time. That is, unless a predetermined number of days (for example, three days) has elapsed since the last time the internal clock time was changed, zero correction of the date and time difference is not performed. If the user notices a time skew of a few minutes and prompts the administrator to return to the correct time, the erroneous date and time difference of the few minutes will not be corrected to zero, and therefore the absolute date and time will be correct. Secured.

In addition, according to the means described in the above (1), the date and time difference is not corrected to 0 until the estimated cumulative error of the internal clock becomes 1 minute or more, and a minute time tampering is performed for several minutes. Even if there is an error, there is no danger of erroneously recognizing it as an error correction of the internal clock and correcting the date and time difference to zero, so that a correct absolute date and time is secured.

According to the means described in the above (2), when the time clock is assembled and the date and time of the internal clock is set for the first time, an incorrect date and time is incorrectly set and then changed to the correct date and time. In this case, even if the date and time difference exceeds the reference time, the date and time difference is corrected to 0 after a predetermined time (for example, 18 hours) elapses. Will work.

According to the means described in (3) above, time tampering with a time difference smaller than the reference time can be detected. However, in this case, since it is very delicate to judge whether the internal clock error is corrected or the time has been tampered with, this time recorder only records the history and prints or displays a list of suspected tampering history. Or by sending it to the host computer and confirming it on the host side, and entrusts the decision to the manager.

Further, the operation of the means described in the above (3) will be described in detail. In most cases, the above-described time falsification is performed according to a series of procedures described below. That is, (tampering of the internal clock) → (input of attendance data) → (change to the correct time)

Considering the date and time difference in the above procedure, the time difference part of the date and time difference at the time of falsification and the time difference part of the date and time difference when the time is changed to the correct time are different in polarity. Alternatively, the latter should have a smaller absolute value.

For example, assuming that the estimated cumulative error is ± 3 minutes, if a delay of 3 minutes actually occurs, it is correct to advance the time by 3 minutes, but the act of delaying the time by 3 minutes is altered. is there. Therefore, when the reference time is set to 4 minutes, the state (3 minutes) after the time falsification with the time difference of −3 minutes
If the attendance data is input in a state of being delayed by one minute, it is necessary to detect it. Then the fraudster himself,
Alternatively, if the administrator changes the internal clock that is 6 minutes behind the world time (actual delay 3 minutes + falsification delay 3 minutes) to the correct time, the date and time difference becomes +3 minutes,
The polarity of the time difference part of the date and time difference is inverted.

For example, if the estimated cumulative error is ± 3 minutes and only a delay of one minute actually occurs, it is correct to advance the time by one minute, but the act of advancing the time by three minutes is It has been tampered with. Therefore, when the reference time is set to 4 minutes, if the attendance data is input in the state of the date and time difference after time falsification + 3 minutes (in a state advanced by 3 minutes), it is necessary to detect that as well. Then, if the internal clock, which is 2 minutes ahead of the time of the world (3 minutes due to tampering-1 minute actual delay) by the fraudster or the administrator, is changed to the correct time, the date and time difference becomes +1 minute. , The absolute value of the date and time difference becomes smaller.

Focusing on the above, if the polarity of the time difference part of the date and time difference is different or the absolute value becomes small, the input date and time of the attendance data input during that time The absolute date and time are stored in the data memory as suspected falsification data, and even if the time is less than the reference time, the management will later determine whether or not the time has been falsified.

Then, the manager considers the attendance of the general person while taking into account the time such as the late / early departure / overtime break / early departure break as described in the section of “Problems to be Solved by the Invention”. By checking data (for example, a time card), it can be determined whether or not the time has been tampered with.

According to the means described in the above (4), the reference time is not used unlike the means described in the above (3).
Suspicion of time tampering can be checked without being affected by the accumulated error of the internal clock. Also, according to this means, it is impossible to print the time tampering mark on the time card, but if you look at the history list, you can check the time tampering based on the list regardless of the time width of the date change can do.

As described above, the above-mentioned technical problems can be solved by the above-described means, and the problems of the conventional technology can be solved.

[0036]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the above-described time recorder with a time falsification check function according to the present invention will be described below in detail with reference to the accompanying drawings.

FIG. 1 is a view for explaining the principle of a time recorder with a time falsification check function according to the present invention, and FIG. 2 is a perspective view showing the appearance of the time recorder according to the present invention. Numeral denotes an electronic time clock, 1a denotes a card pocket in which a time card TC as shown in FIG. 10 is freely inserted, 2 denotes a display for displaying the current date and time, etc., and numeral 3 denotes a numeric keypad as a whole. 3a and the work key 3b that is turned on when going to work
Key 3c and key hole 3d dedicated to mode switching
When a special key (not shown) is inserted into the key hole 3d to switch to the time setting mode,
The date and time of the internal clock 8 shown in FIG. 3 can be freely adjusted. Reference numerals 4a and 4b denote display lamps provided on the attending key 3b and the leaving key 3c.

FIG. 3 is a block diagram illustrating the electrical configuration of the time clock 1 described above. The bus BUS connected to the CPU 5 which forms the center of the control unit stores a system program and the reference time table shown in FIG. RO stored
M6, a data memory RAM 7 for storing a date / time difference and a time falsification record to be described later, an internal clock 8, a timer device 9, and an interface circuit 10 are connected. In addition to the keyboard 3 and the keyboard 3, the key lamp 4 including the display lamps 4a, 4a, a printing device 11 for printing employment data, a time falsification mark, or a falsification history, and various precautions as necessary. A sound generating device 12 for generating a communication item or the like is connected, and each of the
The control operation is performed according to the system program stored in the OM 6.

As shown in FIG. 1, the time clock 1 constructed as described above has a date / time difference storage means for storing the difference between the current date / time of the internal clock 8 and the absolute date / time as a date / time difference in the data memory RAM 7; 8 is changed, an absolute date and time is obtained from the difference between the date and time before the change and the date and time stored in the data memory RAM 7, and the difference between the date and time after the change and this absolute date and time is set as a new date and time difference. The date / time difference rewriting means stored in the memory RAM 7 and the date / time difference stored in the data memory are checked each time the attendance data is input, and if the absolute value of the date / time difference is equal to or greater than a preset reference time, the time is altered. Falsification recording means for keeping a record of the time, reference time setting means for automatically resetting the reference time according to the estimated cumulative error of the internal clock 8, and time of the internal clock 8. Data memory RA every time you want to change
A change execution final date rewriting means for rewriting the change execution final date stored in M7 to the absolute date and time at that time; and a data memory RAM7 each time the date and time difference is corrected to 0
And a modification corresponding date rewriting means for rewriting the modification corresponding date stored in the data memory to the last date of the change implementation at that time, and checking the last date of the modification, the corresponding modification date and the date and time difference stored in the data memory RAM7. The absolute value of the date and time difference is less than the reference time set by the reference time setting means, and the date difference between the last date of the change and the current absolute date and time is not less than a predetermined number of days; The date and time difference for correcting the date and time difference stored in the data memory RAM 7 to 0 only when the absolute value of the accumulated error of the clock 8 is equal to or more than the number of days expected to be 1 minute or more and has already passed from the correction corresponding date. When the internal clock 8 is suspected of tampering, the input date and time and the absolute date and time are stored in the data memory RAM 7 as suspected tampering data. And alteration alleged history list storing means for Airu, either printed or displayed outputs this list, or, tampering alleged history list output means for sending to the host computer are provided.

FIG. 4 shows the relationship between the accumulated error of the internal clock 8 after the time change and the number of days in which the error is expected to occur, and the relationship between the elapsed days after the time change and the corresponding reference time ( A reference time table is shown in the form of a table, and these programs X are stored in advance in the ROM 6 shown in FIG. 3 and used. However, the times and days shown in the drawings are merely examples of the embodiment. Of course.

FIG. 5 is a diagram showing the timing of the time change, the occurrence of the date and time difference, and the timing of the zero correction of the date and time difference. According to this figure, the first time change is the first time after the time recorder 1 is assembled. Setting, at this time the data memory R
Since the check word of AM7 is incorrect, the date and time difference is corrected to zero.

After that, if the time is changed by −1 minute, the time change corresponding to the previous time difference 0 correction (the first time) is not performed immediately even after the three days of the grace period have elapsed. ), The date and time difference is corrected to 0 after waiting until the number of days (30 days) in which the absolute value of the accumulated error is predicted to be 1 minute or more has elapsed.

The reference time in the above case is 2 minutes (see FIG. 4).
Therefore, the time tampering mark M is the time card TC
(See FIG. 10). And the time difference -1
Starting from the day at which the minute is changed, coordinates of the number of elapsed days are newly obtained, and the operation described below is continued.

That is, when 105 days or more have passed since then and the estimated cumulative error is ± 4 minutes in reference to the description in FIG. 4 and the set reference time is 5 minutes, the date and time difference is −4 minutes. Even if the time is changed, since this is within the range of the reference time, no falsification mark is printed on the time card TC. Then, if the time is changed again within three days from this point and the date and time difference becomes -66 seconds, the date and time difference becomes 0 three days after the time and date change of -66 seconds. Will be modified.

In this case, the number of days (30 days) for which the absolute value of the accumulated error is predicted to be 1 minute or more from the time change corresponding to the previous correction of the date and time difference 0 (time change of the date and time difference minus one minute)
Since the above has already passed, zero correction may be made three days later. .

FIG. 6 shows an internal clock 8 executed according to a program stored in the ROM 6 by inserting a special key into the key hole 3d and switching to the time setting mode.
It is a flowchart illustrating the procedure of the setting process,
When the date and time to be corrected in the first step S1 is entered using the numeric keypad 3a, the flow advances to step S2 to set the current date and time, that is, the date and time when the correction is made, to the "date before change" and "before change". At the RAM 7 ”. Next, the process proceeds to step S3, where the date and time of the key input in step S1 is set in the internal clock 8, and in the next step S4, it is determined whether the check word in the data memory RAM 7 is correct, and the correct check word is recorded. If so, the process proceeds to step S5, where the absolute date and the absolute time are obtained from the date and time before the change and the date and time differences (the difference between the internal clock 8 and the absolute date and time) stored in the data memory RAM7. Then, the process proceeds to the next step S6, in which the last date of the change that has changed the internal clock 8 is rewritten to the absolute date at this time, and then, the process proceeds to step S7, where the current date and time and the absolute date obtained in steps S5 and S6. A new date difference and a time difference are obtained from the data and the time, and the date difference and the time difference in the data memory RAM 7 are written in the new date difference and the time difference. Erareru.

In the next step S8, it is determined whether or not the absolute value of the new date difference and time difference obtained in step S7 is greater than or less than a preset reference time.
If the time is equal to or longer than the reference time, the process proceeds to step S9, and the timer device 9 is started to correct the date and time difference to 0 after 18 hours, for example, and the process is ended.

On the other hand, if it is determined in step S8 that the absolute value of the date and time difference is less than the reference time, the process proceeds to step S16 shown in FIG. Is determined, and if the data is present, the process proceeds to the next step S17 to determine the time difference between the previous input and the input time of the time data suspected of being falsified and the absolute time at the time of input. The process proceeds to the next step S18.

In step S18, step S1 is performed.
It is determined whether the previous time difference obtained in step 7 is 0 or a positive number or a negative number. If the time difference is a positive number, the process proceeds to step S19. In this case, the process proceeds to step S20, and these steps S19 and S20 are performed.
Then, the previous time difference is compared with the new current time difference after the time change, and if it is determined that the polarity is inverted, the process directly proceeds to step S22, and the input date and time stored in the temporary storage area are compared with the input date and time. After writing the absolute date and time and the leaving section in the falsification history file of the data memory RAM7, and then clearing the temporary storage area in step S23,
Proceeding to step S24 shown in FIG. 6, the timer device 9 described above is stopped.
9 is initialized and the process is terminated.

If it is determined in steps S19 and S20 that the + and-polarities are not inverted, the process proceeds to step S21, where the absolute value of the time difference between the previous time and the current time is compared. Is smaller than the absolute value of the previous time difference, or if they are the same, the process proceeds to step S22 described above to write the suspected tampering history file, but in step S21 the absolute value of the current time difference is When the value is larger than the absolute value, the above-described step S18
If it is determined that the previous time difference is 0, the process proceeds directly to step S24 in FIG. 6 described above without writing the falsification history record.

On the other hand, if it is determined in step S4 that the correct check word is not recorded in the data memory RAM 7, the process proceeds to step S10, where the correct check word is automatically written in the data memory RAM 7, and Proceeding to S11 and S12, the data memory R
The last date of the change stored in AM7 is rewritten to the absolute date (current date) at that time, and the date and time difference is 0.
After the temporary storage area is cleared in the next step S13, the process proceeds to step S14, where the correction corresponding date stored in the data memory RAM 7 is changed to the final date of the change, and then the step S14 is performed. S
In step 15, the timer device 9 is initialized and the process is completed. Note that at the first time, such as when the time recorder 1 is assembled,
Since no check word has been written in the data memory RAM 7, a correct check word is written in step S10.

FIG. 8 is a flow chart for explaining the contents of the background processing started every minute in accordance with the system program stored in the ROM 6. The date and time difference newly rewritten in the data memory RAM 7 in the first step S30 is shown in FIG. It is determined whether or not the absolute value of is greater than or equal to the reference time. If the absolute value is greater than or equal to the reference time, the process proceeds to step S31, where it is determined whether or not the timer device 9 has timed out. The process proceeds to correct the date and time difference to 0, then proceeds to step S33 to clear the temporary storage area, and proceeds to step S34 to rewrite the correction corresponding date to the last date of the change, and then proceeds to step S35. To initialize the timer device 9 and end the process, but determine in step S31 that the timeout has not occurred. If you are, finish the process.

On the other hand, if it is determined in step S30 that the absolute value of the date and time difference is less than the reference time, the flow advances to step S36 to determine the current absolute date from the current date and the date difference. Proceeding to S37, this absolute date is compared with the above-mentioned last change date. If this last date of change is three days or more before the absolute date, the process goes to the next step S38 to correct the previous date / time difference to zero. It is determined whether or not more than the number of days (30 days) predicted that the absolute value of the accumulated error will be 1 minute or more has elapsed since the corresponding time change (correction correspondence date), and if more than 30 days have elapsed. Goes to step S39 and corrects the date and time difference to 0,
Next, the process proceeds to step S40 to clear the temporary storage area, and then proceeds to step S41 to rewrite the correction corresponding date to the last date of the change and end the process.

If it is determined in step S37 that three days or more have not passed, the process proceeds to step S3.
If it is determined in step 8 that 30 days have not elapsed, the process ends without correcting the date and time difference to zero.

FIG. 9 is a flow chart for explaining the processing operation of the time clock according to the present invention at the time of leaving / working. In the first step S50, whether the processing is time-out / work-out by turning on the working-time key 3b or the leaving key 3c. Is determined, and then in step S51, the time card TC
Is inserted into the time clock 1, the flow advances to step S52 to obtain the current time from the internal clock 8, and then to the next step S52.
At 53, the current time is set for the print data (work data or leaving data) to be printed, and the process proceeds to the next step S54.

In step S54, the absolute date and the absolute time at that time are obtained. Then, the process proceeds to step S55, where the absolute date and the data memory RA obtained in step S54 are obtained.
The number of days elapsed is calculated from the last date of the change stored in M7, and the reference time corresponding to the number of days elapsed is automatically obtained from the reference time table shown in FIG. 4 in step S56. Proceed to step S57.

In step S57, it is determined whether or not the absolute value of the current date and time difference is equal to or greater than the reference time obtained from the reference time table. If the absolute value is equal to or greater than the reference time, that is, if the internal clock 8 is incorrectly modified. Proceeds to step S58 to add a falsification mark M (see FIG. 10) to the print data of attendance or leaving work to be printed on the time card TC, and then proceeds to step S59 to similarly add the absolute time MH to the above print data. (See FIG. 10), and the process proceeds to the next step S60.

In step S60, the print column position of the inserted time card TC is determined. Then, the flow advances to step S61 to print the above-described print data in a predetermined print column of the time card TC as shown in FIG. Step S6
In step 2, the time card TC is discharged to the card pocket 1a, and the process is completed. Note that in the embodiment shown in FIG. 10, a “Δ” mark is printed as the falsification mark M, but this mark is an example of the embodiment, and its form is arbitrary.

On the other hand, when it is determined in step S57 that the absolute value of the date and time difference at the present time is less than the reference time, that is, when the internal clock 8 is input without unauthorized operation, If the date is later input to the original time, the process proceeds to step S63 to determine whether the date and time difference is 0. If not, the process proceeds to step S64 to set the current date and time to the input date. Then, the process proceeds to step S65 to determine whether or not there is data in the temporary storage area of the data memory RAM 7. If there is no data, the process proceeds to step S66 to enter the input date, the input time, the absolute date, and the absolute date. The time and the leaving section are written in the temporary storage area, and when there is data, these data are not written. When the capacity of the temporary storage area is increased to a plurality of data, it goes without saying that a plurality of data can be simultaneously stored.

After the processing in step S66 is completed, the flow proceeds to the next step S67, where the type of late, early retirement, or overtime is determined. In the next step S68, it is determined that it is one of late, early retirement, or overtime. If so, the process proceeds to step S69 to add the character of the determination result to the print data and proceeds to step S60 described above. If it is determined in step S68 that none of the late, early, or overtime work is performed, Then, the process directly proceeds to step S60 to print data on the time card TC.

FIG. 11 shows a time falsification suspicion history list output by setting the operation mode of the time recorder 1 to “falsification falsification history printing”. This list SH is written in the falsification falsification history file described above. The inserted leaving section Sa, the current date and time Sb, and the absolute date and time Sc are printed out.

FIG. 12 shows an example of time falsification in Table Y. The point (a) is a normal time when the internal clock 8 is not changed. The date and time are respectively 9:20:00 ", the date and time difference is" 0 ", and the fact that the time has been falsified is, of course, eliminated. However, if the internal clock 8 is changed to 8: 580" as shown in point (b), the absolute Since the date and time is 9:20:00 ", the date and time difference is -4 minutes. If only three days have elapsed since the last change, the reference time is determined to be 1 minute from the reference time table of FIG. 4 and the absolute value of the date and time difference is equal to or greater than the reference time. Regardless of tampering, the tampering mark M can be printed as date 14 in FIG. 10, but if this change is made after 105 days or more as shown in FIG. 5, for example, the reference time at that time Is 5 minutes according to the reference time table shown in FIG.
Even if the time card TC is inserted at the point (c) three seconds after the point (b), the date 11 shown in FIG.
Is not printed on the time card TC. Instead, at point (c), there is a possibility of tampering, so the input date / time, absolute date / time, and exit / withdrawal category are written in the temporary storage area.

After that, at the point (d) six seconds after the point (b), the stamper advances the internal clock 8 to the point (e), that is, 9: 0100 ″ (returned to the original state). Case), the time difference from the absolute time at this point is -6.
Since the time difference is 6 seconds, and the new time difference is smaller in the time difference portion of the date and time difference, the input date and time, the absolute date and time, and the exit / withdrawal division written in the temporary storage area at point (c) are stored in the falsification history file. You. As described above, even if the time is tampered with four minutes smaller than the reference time of five minutes, it can be recorded in the record as a tampering suspicion history list as shown in FIG.

FIGS. 13 to 16 are flow charts for carrying out the invention described in claim 4 of the present application. Since the reference time is not used, time tampering is not affected by the accumulated error of the internal clock 8. In the present invention configured to detect the suspicion, the time tampering mark M cannot be printed on the time card TC, but the suspicion history list SH can be created as shown in FIG. By looking at this list SH, it is possible to confirm the fact of time falsification based on the list, regardless of the size of the time width of the date change.

FIGS. 13 and 14 are flow charts for explaining the processing procedure for setting the internal clock 8 in the same manner as the flow charts shown in FIGS. 6 and 7 described above. This is performed in the order of S92, and when compared with the processing procedure shown in FIGS. 6 and 7, in FIGS. 6 and 7, only when the absolute value of the date and time difference is less than the reference time, the temporarily stored data is deleted. Although the process of whether or not to copy the suspected falsification file is performed, in this embodiment, the process of whether or not to copy the temporarily stored data to the suspected falsification file when the date difference becomes 0 regardless of the reference time. It is a mechanism to perform.

FIG. 15 is a flow chart for explaining a processing procedure in the case of performing a clock-in / clock-out operation similar to the flow chart shown in FIG. 9 described above, and the processing is performed in the order of steps S100 to S114 shown in FIG. In comparison with the processing procedure shown in FIG. 9, in FIG. 9, the input date and time are written in the temporary storage area only when the absolute value of the date and time difference is less than the reference time. Is configured to write the input date and time into the temporary storage area when the date and time difference is not 0 irrespective of the reference time.

FIG. 16 is a flowchart for explaining the procedure of the background process started every minute, which is the same as the flowchart shown in FIG. 8 described above. The process is performed in the order of steps S120 to S125 shown in FIG. In comparison with the processing procedure shown in FIG. 8, in FIG. 8, the processing is performed for both the case where the absolute value of the date and time difference is equal to or more than the reference time and the case where the absolute value is less than the reference time. It is a mechanism that performs only the same processing as the processing in the case of less than the time.

[0068]

As described above, according to the time recorder with the time tampering check function according to the present invention, when the internal clock is illegally changed and the attendance data is input at a time different from the original time, the time is changed. Since fraud can be detected and recorded in the record as a list of alleged tampering history, it is possible to accurately grasp the improper input of time falsification by the stamper or administrator, and take appropriate measures for the fraud. However, according to the present invention, in particular, minute time tampering can be accurately checked for a few minutes, and as a result, time tampering can be prevented, and an advantage that can be used to correct employee discipline can be exhibited. is there.

[Brief description of the drawings]

FIG. 1 is a principle explanatory diagram for explaining a function of a time recorder with a time falsification check function according to the present invention.

FIG. 2 is a perspective view showing the appearance of a time recorder with a time tampering check function according to the present invention.

FIG. 3 is a block diagram showing an electrical configuration of the time clock shown in FIG. 2;

FIG. 4 is a diagram illustrating a relationship between a cumulative error after a time change, a predicted number of days, and a reference time table.

FIG. 5 is a diagram illustrating timings of time change, date and time difference, and zero correction of the date and time difference.

FIG. 6 is a flowchart illustrating a processing procedure when an internal clock is set.

FIG. 7 is a flowchart showing a continuation of the flowchart shown in FIG. 6;

FIG. 8 is a flowchart illustrating a procedure of a background process started every minute.

FIG. 9 is a flowchart illustrating a processing procedure for performing a clock-in / clock-out input operation using the time clock according to the present invention.

FIG. 10 is a partially cutaway front view of the time card printed according to the present invention.

FIG. 11 is a front view of an example of the time falsification suspected history list printed out by the time clock according to the present invention, partially cut away;

FIG. 12 is an explanatory diagram showing an example of time tampering in a table.

FIG. 13 is a flowchart illustrating a processing procedure for setting an internal clock according to another embodiment of the present invention.

FIG. 14 is a flowchart illustrating a continuation of the flowchart of FIG. 13;

FIG. 15 is a flowchart illustrating a processing procedure for performing a clock-in / clock-out operation according to another embodiment of the present invention.

FIG. 16 is a flowchart illustrating a procedure of a background process in another embodiment of the present invention.

FIG. 17 is a front view, partially cut away, of an example of a time falsification suspected history list printed by a time clock according to another embodiment of the present invention.

[Explanation of symbols]

 Reference Signs List 1 time recorder 3 keyboard 3d setting key hole 7 RAM (data memory) 8 internal clock TC time card Ra, Rb current time MH absolute date and time (time) M falsification mark SH time falsification history list

Continuation of front page (58) Fields investigated (Int. Cl. ⁷ , DB name) G07C 1/00 G06F 17/60 G07B 15/00 A63F 7/02 334 G06F 1/04 351

Claims (4)

(57) [Claims] The difference between the current date and time of the internal clock and the absolute date and time is stored in the data memory as the date and time difference. When the date and time of the internal clock is changed, the date and time before the change and the date and time are stored in the data memory. The absolute date and time is obtained from the date and time difference, and the difference between the date and time after the change and the absolute date and time is stored as a new date and time difference in the above data memory. In a time recorder configured to leave a record of time tampering when the absolute value of the date and time difference is equal to or longer than a preset reference time, the estimated accumulated time of the internal clock is checked. A reference time setting means for automatically setting the reference time according to a reference time table stored in a memory according to an error; and a data memory for each time the time of an internal clock is changed. A means for rewriting the last date of the internal clock for rewriting the stored last date of the change to the absolute date and time at that time, and a data for each time the date and time difference stored in the data memory is corrected to zero. A correction corresponding date rewriting means for rewriting the correction corresponding date stored in the memory to the change final date at that time; and a date and time difference between the change corresponding final date and the correction corresponding date stored in the data memory. Investigating, the absolute value of the date and time difference is less than the reference time set by the reference time setting means, and the date difference between the last date of the change and the current absolute date is not less than a predetermined number of days, Further, the absolute value of the accumulated error of the internal clock is 1
Date and time difference correction means for correcting the date and time difference stored in the data memory to 0 only when the correction corresponding date has passed since the correction corresponding date for the number of days expected to be more than minutes Time recorder with time tampering check function. 2. The method according to claim 1, wherein when the absolute value of the date and time difference stored in the data memory is equal to or longer than the reference time set by the reference time setting means, the date and time difference is corrected. 2. The data processing apparatus according to claim 1, further comprising a correction function of storing data and then correcting the data to zero.
A time recorder with the described time tampering check function. 3. A time difference stored in the data memory is checked each time the time data is input. If the time difference is not 0 but less than a reference time, the input time and absolute time of the time data are recorded. When the absolute value of the new date and time difference is smaller than the reference time when the date and time of the internal clock is changed again, the new date and time difference is temporarily stored. Compared with the date / time difference between the input date / time and the absolute date / time, whether the two date / time differences have different polarity in the time difference part or the new date / time difference is smaller with respect to the absolute value of the time difference part. Only in such a case, a suspicious tamper history list storage means for storing the above input date and time and the absolute date and time temporarily stored in the data memory as suspicious tamper data in the data memory; 2. The time recorder according to claim 1, further comprising a falsification history list output means for printing out or displaying the list or transmitting the list to a host computer. 4. The difference between the current date and time of the internal clock and the absolute date and time is stored in the data memory as a date and time difference, and when the date and time of the internal clock is changed, the date and time before the change and the date and time are stored in the data memory. In the time recorder having the function of obtaining the absolute date and time from the date and time difference and storing the difference between the changed date and time and this absolute date and time as a new date and time difference in the data memory, time data is input. Each time the date and time difference stored in the data memory is checked, and if the date and time difference is not 0, the input date and time and the absolute date and time of the attendance data are temporarily stored in the data memory. If the date difference part of the new date difference is 0 when the change is made, the new date difference and the date difference between the input date and the absolute date and time temporarily stored in the data memory are checked. The first condition is that the date difference part of the date and time difference is not 0, and whether the date difference part of the latter date and time difference is 0 and the +/- polarities of the two time difference parts are different from each other, Alternatively, the second condition is that the new date / time difference is smaller with respect to the absolute value of the time difference portion.
Suspected alteration history list storage means for filing the input date and time and the absolute date and time temporarily stored in the data memory as suspected alteration data in the data memory only when either one of the condition and the second condition is satisfied. A time tampering check function, which comprises: a tampering history list output means for printing out or displaying the tampering history list or transmitting the tampering history list to a host computer.