JP2585040B2 - Time clock - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a time recorder having a digital display unit and an analog display unit.

[Prior art] A time clock using an electronic timepiece as a timepiece mechanism drives a printing wheel in synchronization with a time via a wheel train or a ratchet mechanism by rotating a stepping motor, and performs a printing operation by a hammer driven by a solenoid. Because of its operation, a large amount of electric power is required for the operation, and a commercial power source is required as an operation energy source. For this reason, if the supply of commercial power is suddenly interrupted due to a power failure or the power plug is dropped, the power recovery is detected when the power is turned on, that is, when the power is restored, and the drive is driven to the reference printing stage. Calculates the number of steps from the current printing step to the printing step position that should be at the time of power recovery and performs step-up driving to automatically correct the printing step position, and adjusts the current time, the rotation position of the printing wheel, and the printing step position. (Eg, Japanese Patent Application No. 60-210622).

[Problem to be Solved] With the above configuration, even if there is an instantaneous power failure, the printing stage position of the time card is automatically corrected, so that, for example, the power supply voltage becomes close to the power failure detection voltage of the time recorder. If the power supply voltage drops, the power supply voltage drops due to abrupt power consumption operations such as printing and printing step driving, and if a power failure occurs momentarily, the step position is automatically corrected immediately. In this case, since an instantaneous power failure appears due to the operation of the time clock itself, automatic correction is repeated, and printing is disabled. Performing the automatic correction operation at such an instantaneous power failure is not only annoying and noisy, but also reduces the useful life of the time recorder and increases power consumption.

Therefore, an object of the present invention is to prevent automatic correction from being activated in an instantaneous power failure, eliminate complexity, enable use near a power failure detection voltage, reduce power consumption, and increase the service life of the time clock. is there.

[Means for Solving the Problems] The feature of the present invention includes an auxiliary power supply for supplying power to a digital display unit and a control circuit at the time of a power failure, and a power failure time measuring circuit for measuring a power failure time. The power is supplied from the auxiliary power source, the current time is displayed on the digital display, the time is continued by the control circuit, and the analog display and the time printing mechanism are stopped. And the power failure time measured by the power failure time measurement circuit is
The automatic correction of the printing stage position is performed only when the power is restored for a predetermined time or longer.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

The time clock of the present invention has an analog section and a digital section, and the phase of the analog section is adjusted to the setting contents set in the digital section. The analog part is the second
An analog display section 1 as shown, a time printing mechanism section B including print wheels 27, 28, 29 and a printing hammer 30, a time card
47 and a card stage positioning device C for determining the position of the stage to be printed. The digital section includes an electronic clock circuit 6 serving as a basic clock and a digital display section 4 for digitally displaying the contents of the clock of the clock circuit, and further includes display means 2 and 3 for displaying a surface of the time card to be printed. In.

FIG. 2 shows an analog display section 1 including an hour hand 26 and a minute hand 25;
The display means 2 and 3 on the front and back of the time card are shown.
The printing surface display means 2 is indicated by a numeral at one corner of the digital display unit 4, where "1" indicates a front and "2" indicates a back. Further, the printing surface display means 3 comprises a lamp 3a for displaying the front and a lamp 3b for displaying the back on the upper part of the analog display section 1. As the lamp, a light emitting diode or the like is used, and a color lamp or the like according to the front and back colors of the time card is also used.

FIG. 1 shows an example of a circuit for driving the time clock. The control circuit 5 includes an electronic clock circuit 6, a CPU 7,
It comprises a ROM 8 storing a control program for managing the operation of the CPU, and a RAM 9 storing the time at the start of power failure and the like. A motor driving signal S1 for driving the analog display section 1 and the type wheels 27, 28, 29 of the time printing mechanism section B from the control circuit 5, a printing command signal S2 for driving the printing hammer 30 of the time printing mechanism section, Front / back determination signal to determine front / back
It is configured to output S3, S3a, S3b and a step-up signal S4 for determining the position of the card of the time card 47.

Therefore, the configuration will be described below sequentially from the analog section.

First, the configuration for driving the analog display section 1 will be described. As shown in FIGS. 3 to 5, the output of the motor drive signal S1 from the control circuit 5 causes the drive motor 11 to operate via the motor drive circuit 10. . Motor wheel 11a of motor 11
Has a motor pinion 12 secured thereto, and the clutch wheel 13 is engaged with this pinion. On both sides of the clutch wheel 13, a minute feed projection 13a and a date feed projection 13b are provided, and an engagement projection 14a of the minute clutch wheel 14 and an engagement projection 15a of the date clutch wheel 15 are provided.
Are engaged with each other. The above three clutch vehicles 13 ~
Both ends of the clutch axle 16 penetrating through 15 are left and right side plates 17a, 17
The minute and date clutch wheels 14 and 15 are elastically engaged with the clutch wheels 13 via respective projections by being supported by b and receiving the spring force of the coil springs 18a and 18b.

The meshing state between the minute feeding projection 13a and the engaging projection 14a and the meshing state between the date feeding projection 13b and the engaging projection 15a will be described. When the clutch wheel 13 rotates in the forward direction, the rotation is applied to the minute clutch wheel 14. It is transmitted to date clutch car 15 and not transmitted. When the clutch wheel 13 rotates in the reverse direction, the rotation is transmitted to the date clutch wheel 15 and not transmitted to the minute clutch wheel 14.

The rotation of the minute clutch wheel 14 is transmitted to the analog display unit 1 via the transmission mechanism A. Regarding the transmission mechanism A, the minute reduction gear 19 is engaged with the pinion 14b of the minute clutch wheel 14. The minute reduction gear 19 is rotatably supported by a reduction axle 20, and a crown gear 19a is provided on one side thereof. The first transmission wheel 21 meshes with the crown gear 19a. The minute wheel 22 and minute hand pinion 23 are sequentially meshed with the first transmission wheel 21a, and the hour wheel 24 is meshed with the minute wheel 22a. The minute hand 25 and the hour hand 26 are attached to the minute hand pipe 23a and the hour hand pipe 24a, respectively, and the minute hand 25 and the hour hand 26 are sent by the supply of the motor drive signal S1 to display the current time in analog.

Next, the time printing mechanism B for printing the date and time on the inserted time card 47 will be described with reference to FIGS. The time printing mechanism B has a type ring 27 with numbers “1” to “60” protruding on the outer peripheral surface, and a type ring 28 with numbers “1” to “24” protruding on the outer peripheral surface. It includes a date print ring 29 protruding from "" to "31" and a print hammer 30 having a hammer rubber 30a crossing these three print rings 27-29. The time print wheel 28 is rotatably supported by the print wheel 31, the split print wheel 27 is rotatably supported by the boss of the time print wheel 28, and the date print wheel 29 is freely rotatable by the print shaft 31. It is pivoted. The drive of the minute and hour type wheels 27 and 28 will be described. The transmission pinion 19b is provided on the other side of the minute reduction gear 19 in the transmission mechanism A to the analog display unit 1 driven by the supply of the motor drive signal S1. The transmission pinion 19b is meshed with the gear 27a of the letter-shaping ring 27, and is driven to rotate once per hour in conjunction with the analog display unit. In order to transmit the rotation of the character ring 27 to the time character ring 28, a cam portion 27b is formed at the center of the character ring 27 as shown in FIG. 6, and 24 ratchets are provided at the right end of the character shaft 31. The feed ratchet wheel 32 is fixed when it has teeth. An L-shaped feed lever 34 is pivotally supported on a fixed shaft 33 projecting from the right side plate 17a so as to be swingable. The protrusion 34a formed at the tip of one arm of the feed lever slides on the cam surface of the cam 27b,
The feed lever 34 is swung once each time b rotates once per hour. An hour feed claw 35 is swingably connected to the tip of the other arm of the feed lever 34 by a feed claw 35a, and this feed claw 35 is engaged with the hour feed ratchet wheel 32. The spring force of the feed lever 34 and the hour feed claw 35 is biased toward the normal cam portion 27b and the hour feed ratchet wheel 32 by the force of a spring 36. Therefore, while the projection 34a slides on the cam surface for one hour, the hour feed pawl 35 is retracted by one tooth of the hour feed ratchet wheel 32 and engages with the next tooth, and
When the roller 34a falls down the step on the cam surface, the hour feed ratchet wheel 32 is instantaneously rotated by one tooth by the spring force of the spring 36, and the hour type wheel 28 is rotationally driven via the type shaft 31. Numeral 37 denotes a reverse stop claw of the hour feeding ratchet wheel 32. The driving force of the date type wheel 29 is given from the date clutch car 15. That is, as shown in FIG. 3, the date reduction vehicle 38 is attached to the pinion 15b of the date clutch vehicle 15.
And the gear 29a of the date type wheel 29 meshes with the date reduction pinion 38a, and the rotation is sequentially transmitted. As described above, since the rotation of the date clutch car 15 is transmitted when the clutch car 13 rotates in the reverse direction, the motor drive signal S1 such that the drive motor 11 reversely rotates once every 24 hours is output from the motor drive signal S1. This is supplied to the circuit 10. Further, the print hammer 30 is driven by supplying a print command signal S2 from the control circuit 5 to the print solenoid 40 via the print solenoid drive circuit 39. That is, as shown in FIG. 7, one arm of a hammer drive lever 43 pivotally supported by a shaft 42 is attached to a plunger 41 of a print solenoid 40 by a spring pin 44.
Are connected via Recessed in hammer drive lever 43
43a is provided, and the swing center axis 45 of the print hammer 30 is located at a gap in the concave position, and regulates the swing angle of the hammer drive lever 43. The hammer drive lever 43 resiliently contacts the back of the print lever 30 by a return spring 46, and swings by the operation of the print solenoid 40 to move the print hammer 30 to the print wheels 27 to 29.
And print out on the time card 47,
After printing, it is returned to the original position by the return spring 46.

As shown in FIG. 8, the time card 47 used in the time clock of the present invention is of a double-sided recording type and has a front surface 47a.
There are provided 15 print columns 47c on the back side 47b and 16 print columns 47c on the back side 47b, so that printing for 31 days is possible. The numbers 1 to 31 on the left line do not indicate the date, but indicate the number of days from the deadline. As shown in FIG. 7, this time card 47 is a card guide that opens in the upper plate of the frame 48.
From 49, the minute, hour and date described above are inserted between the print ring 27, 28, 29 and the print lever 30. The lower end of the time card 47 is configured to be received by a card receiving portion 50a provided on the switch lever 50 as shown in FIG. The switch lever 50 is swingably supported by the switch lever 51,
The switch lever spring 52 applies a spring force to push the card receiving portion 50a upward. The card detection switch 53 is turned on / off by the operation piece 50b of the switch lever 50. When the signal of the card detection switch 53 is supplied to the control circuit 5, the print command signal S2 is supplied to the print solenoid drive circuit 39.

The switch lever true 51 and the card detection switch 53 are
It is attached to the step-up rack 54 of the card step positioning device C. Therefore, the card stage positioning device C will be described below with reference to FIGS. Card stage positioning device C
Is composed of a lever mechanism C1, a feed claw 65, a ratchet gear 67a, and a step-up mechanism C2. Lever mechanism C1 is
As shown in FIG. 10, when the step-up signal S4 from the control circuit 5 is supplied to the step-up solenoid driving circuit 55 (first illustration), the step-up solenoid 56 is operated. Step-up solenoid
One arm of a first set lever 59 pivotally supported by a swing center shaft 58 is provided on an engagement pin 59 of the plunger 57.
linked by a. A second set lever 62 and a third set lever 63 are pivotally supported by the swing center shafts 60 and 61, respectively. The first set lever 59, the second set lever 62, and the second set lever 62 Third set lever 63
Are connected by pins 59b and 63a to form a lever mechanism. A return spring 64 is provided on the operation portion 59c of the first set lever 59.
Is hung. At the tip of the third set lever 63, a step-up gear feed pawl 65 is swingably connected by a feed pawl stem 65a, and the pawl is engaged with a ratchet gear 67a of a first step-up gear 67 by a spring 66. Elastic force is applied as described above. The first raising wheel 67 is rotatably supported on the type shaft 31, and cannot be rotated in the reverse direction by the engagement of the anti-reverse pawl 68 with the ratchet gear 67a. For this purpose, the step signal S4
Is input, the step-up solenoid 56 operates, and the feed pawl 65
When the step-up signal S4 is cut off after the tooth has been retracted and engaged with the next tooth, the spring returns from the return spring 64 to return to the original position. At this time, the ratchet gear 67a is advanced by the feed pawl 65. The number of teeth of the ratchet gear 67a is 32.
The gear wheel 67 has 64 teeth. As shown in FIG.
The 64 tooth profiles have thick teeth 67b, 67b at positions 180 degrees apart,
With two missing teeth in the counterclockwise direction from this thick tooth 67b, 2
There are eight thin teeth 67c and one missing tooth. The intermittent rotation of the first step-up gear 67 due to the above-described intermittent stepping of the ratchet gear 67a is transmitted to the rack and pinion type step-up mechanism C2, and the second gear meshing with the first step-up gear 67. Step up car
68 is rotatably provided on the support shaft 69. 2nd lift car
The rack feed gear 68a is integrally formed with the rack feed gear 68, and the rack feed gear has 17 teeth, one of which is a toothless portion. The number of teeth of the second gear wheel 68 is 34, and one thin tooth 67c is formed in the counterclockwise direction from the thick tooth 68b meshing with the thick tooth 67b of the first gear wheel. 28c teeth 68c meshing with
And four missing teeth. The rack teeth 54a of the step-up rack 54 are meshed with the rack feed gear 68a. The step-up rack 54 is movable up and down along a rack guide shaft 70. In FIGS. 7 and 10, reference numeral 71 denotes a rack stopper provided on the left side plate 17b, which regulates the position of the lowest stage of the step-up rack 54. This lowermost position of the raising rack 54 is an initial position for calculating the number of raisings, and an initial position detection switch is provided.
Activating the limit switch 72 generates a detection signal of the initial position. The toothless portions formed in the first gear-raising gear 67, the second gear-raising gear 68, and the rack feed gear 68a are provided to drop the gear-raising rack 54 to the lowermost gear after being raised to the uppermost gear. It was done.

In FIG. 2, reference numerals 73 and 74 denote an outer front frame and a rear frame, respectively, and an operation panel 75 is provided on the front surface. control panel
75 can be opened and closed by swinging the front lid 76.

In FIGS. 1 and 2, the mode changeover switch 77 provided on the operation panel 75 has a digital terminal 77 a and an analog terminal 7.
7b and the lock terminal 77c can be selectively switched. 78 is a select switch, and 79 is a set switch.

The power supply circuit 80 shown in FIG. 1 converts the commercial power supply AC into direct current to supply drive power to the motor drive circuit 10 and the solenoid drive circuits 39 and 55, while charging the secondary battery 81 serving as an auxiliary battery in a floating state. It is configured to supply operating power to the control circuit 5 and the display drive circuit 82 of the digital display unit 4.

By the way, when the supply of the commercial power AC is cut off due to a power failure or the like from the energized state, the control circuit 5 receives the power supply from the backup auxiliary power supply 81 and continues the operation state. At the same time, power is also supplied from the auxiliary power supply 81 to the display drive circuit 82, so that the digital display unit 4 continues to display the current time as before the power failure. However, when the supply of the commercial power AC is stopped, the power failure detection circuit 83 inverts its output to the H level. CPU7 which received the H level signal,
The time of the clock circuit 6, that is, the time at the start of the power failure, is stored in the RAM 9, and the driving signal S is transmitted to the motor driving circuit 10, the printing solenoid driving circuit 39, and the step-up solenoid driving circuit 55.
Prevent output of 1, S2, S4. For this reason, the drive circuits 10, 39, and 55 of the parts requiring a large current are kept in an inoperative state, and unnecessary waste of the backup auxiliary power supply 81 is prevented. This power failure state is supplied from the power failure detection circuit 83 to the power failure time measuring circuit 84, and the measurement of the power failure time starts. That is, as shown in the flowchart of FIG. 11,
When the power failure state and the power failure clock measurement circuit 84 start,
It is determined whether or not the power has been restored, and if no (N), it is counted by the power failure time measuring circuit 84, and further, whether or not the power has been restored continues to be counted during the no.

In such a state, when the commercial power supply AC is supplied to the apparatus due to the restoration at the time of the power failure, the power failure detection circuit 83 inverts and outputs an L level signal to the control circuit 5 and determines whether or not the power has been restored. Becomes yes (Y), and the power failure time measurement circuit 84 stops measuring the power failure time. further
The CPU 7 releases the operation prohibition state of the motor drive circuit 10 and outputs a pulse signal having a higher repetition frequency to the motor drive circuit 10 as compared to the normal motor drive signal S1,
This pulse signal is regarded as the drive signal S1 and is added to the power failure start time stored in the RAM 9. The motor 11 receives the pulse signal having the high repetition frequency and fast-forwards the analog display unit 1, the type wheels 27, 28, and 29. Continue such operation,
The output of the fast-forward pulse signal is stopped when the sum of the power failure start time and the pulse signal matches the value of the clock circuit 6. As a result, the display time of the analog display unit 1 and the date, hour, and minute of the type wheel 27, 28, 29 are automatically corrected to the current time. At the same time, the CPU 7 releases the operation inhibition state of the solenoid drive circuits 39 and 55, and the automatic correction of the printing stage position starts. That is, after the power failure time measurement circuit 84 is stopped, it is determined whether or not the power failure time is 1 second or longer, and if no, it is further determined whether there is a carry during the power failure. Return to operation. If this is the case, the operation returns to the normal operation after the printing stage drive processing by one-stage carry is performed.

If it is determined that the power outage time is equal to or longer than one second and the answer is YES, the printing stage position is automatically corrected as shown in the flowchart of FIG. That is, if it is determined whether or not the limit switch 72 has been turned on,
The step is driven up. This is repeated to determine whether the limit switch 72 is on or not, and if yes, the necessary step-up number N is calculated and obtained. Next, if it is determined whether N = 0 or not, if the result is YES, the step-up driving is ended and the operation returns to the normal operation. If N = 0 is negative, N-1 is set as a new N, and the step-up driving is repeated. When N = 0 is reached by repeating this, the step-up driving is terminated and the operation returns to the normal operation.

In this embodiment, it is set to perform automatic correction of the step-up when there is a power failure of 1 second or more. However, the present invention is not limited to this time, and may be about 30 seconds. The purpose can be achieved by defining the range of the instantaneous power failure in advance. In addition, the time when the commercial power supply was cut off is stored in the RAM 9, but the total value of the time from the start of the power failure to the recovery from the power failure and the time required to correct the time, that is, from the time after the power failure, It is needless to say that the same operation can be achieved even if the time until the completion of the correction is adjusted and the number of pulse signals corresponding to this time is output.

[Effect] Since the present invention has the above configuration, the automatic correction does not operate at an instantaneous power outage, and the complexity and annoyance are eliminated. Further, it can be used even near the power failure detection voltage, and the appearance of the power failure state based on the operation of the time clock itself can be prevented. Further, power consumption can be reduced, and the service life of the time clock can be increased.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows an embodiment of the present invention. FIG. 1 is a block diagram of a circuit for driving a time clock according to the present invention.
FIG. 2 is an external perspective view of a time clock, FIG. 3 is a cross-sectional view of a main part of a drive mechanism, FIG. 4 is an exploded perspective view of a clutch mechanism, FIG. 5 is a cross-sectional view of a transmission mechanism to an analog display section, and FIG. 6 is a side view of a mechanism for driving a time character wheel, FIG. 7 is a side view of a time printing mechanism and a card step positioning device, FIG. 8 is a front view and a back view of a time card, and FIG. FIG. 10 is a front view of the detection switch mechanism, FIG. 10 is a side view of the step-up mechanism and the card step positioning mechanism, and FIGS. 11 and 12 are flowcharts for explaining operations at the time of power failure and power recovery. A: transmission mechanism, B: time printing mechanism, 1: analog display, 4: digital display, 5: control circuit, 10: motor drive circuit, 11: motor, 25: minute hand, 26: hour hand, 27, 28 , 29
... Type ring, 81 ... Auxiliary power supply, 83 ... Power failure detection circuit, 84 ... Power failure time measurement circuit.

Claims (1)

(57) [Claims] A digital display for displaying the current time based on a time signal, and a motor driven by a motor drive circuit which is normally operated by a commercial power supply based on the time signal is driven via a transmission mechanism. An analog display unit having hour and minute hands and a time printing mechanism including a character ring; a control circuit for controlling the digital display unit, the analog display unit and the time printing mechanism unit; An auxiliary power supply that supplies power to the control circuit, a power failure detection circuit that detects a power failure of the commercial power supply, and a power failure time measurement circuit that measures a power failure time,
A time recorder which stops the analog display unit and the time printing mechanism unit during a power failure and automatically corrects the printing stage position only when the power failure time is equal to or longer than a predetermined time.