JPH0445081Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a power outage countermeasure technique for a time recorder that uses electricity as its operating source.

(Prior art) A time recorder that uses an electronic clock as a timekeeping mechanism drives a printing wheel in time with the rotation of a step motor via a wheel train or a ratchet mechanism, and also performs the printing operation using a hammer driven by a solenoid. Due to the nature of the operation, a large amount of electric power is required during operation, so commercial power sources are used as the operating energy source.

Therefore, if the supply of commercial power is unexpectedly cut off due to a power outage or the power plug falling off, the rotating gear train and ratchet mechanism may stop midway, resulting in a shift in the starting point when commercial power is restored. There was a problem in that the printing wheel and card feeding mechanism stopped at a location other than the correct position, causing printing errors.

(Problems to be solved by the invention) In view of these problems, the present invention supplies power to the motor from an auxiliary power source when the supply of commercial power is cut off while the gear train or ratchet mechanism is rotating. After completing one cycle to the proper engagement position, the drive function of the printing mechanism is stopped, and only the electronic circuit related to timing is backed up using the auxiliary power supply, so that printing can be performed normally even after power is restored. The purpose is to provide a time clock that can be used.

(Example) Therefore, the details of the present invention will be explained below based on the illustrated example.

FIG. 3 shows the central part of the time recorder according to the present invention, and this mechanism is roughly divided into a clutch mechanism 10 driven by a step motor 19, and a type wheel driven by this clutch mechanism 10. group 20 and a mechanism 30 that transmits rotation to the hands 37 and 38 via the minute reduction wheel 17.
(Fig. 4), a conveying mechanism 40 that receives driving force from the date printing wheel 24 and operates to advance the card, and a printing mechanism 50 that prints the date and time on the inserted card c. has been done.

Next, to explain the detailed mechanism of each of these parts, a clutch axle 11 supported between the front side plate 1 and the rear side plate 2 has a clutch wheel 12 that meshes with a pinion 19a fixed to the shaft of a step motor 19.
is loosely fitted onto the clutch axle 11, and a minute clutch wheel 13 and a day clutch wheel 15 are biased in the axial direction by coil springs 14, 14 interposed between the front side plate 1 and the rear side plate 2, respectively. are loosely fitted so as to sandwich the clutch wheel 12.

FIG. 5 shows an exploded view of this clutch mechanism 10. On both sides of the clutch wheel 12, a minute feed cylinder 12a and a date feed cylinder 12b, each having oppositely oriented clutch teeth on their end faces, protrude integrally. The minute clutch wheel 13 and the date clutch wheel 15 have a minute feed cylinder 13a and a date feed cylinder 15b protruding from their inner ends, respectively, and the clutch teeth provided on each end face of the clutch wheel 12 are formed in a protruding manner. By engaging each clutch tooth of the clutch wheel 1 every minute,
2 rotates once in the clockwise direction in the figure, the minute clutch wheel 13 engaged with the minute feed barrel 12a shifts to the minute reducer wheel 1.
7 (FIG. 3) to 1.
When the clutch wheel 12 rotates counterclockwise in the figure at midnight every morning, the date cylinder 12
The date clutch wheel 15 engaged with the date clutch wheel 15 is configured to rotate a date type wheel 24, which will be described later, by one frame via the date reduction wheel 18.

Returning again to Fig. 3, the type ring group 20 for printing the date and time at the required locations on the time record card c has the same diameter with numbers 1 to 60, 1 to 24, and 1 to 31 protruding from its circumference. It is composed of a minute type wheel 22, an hour type wheel 23, and a day type wheel 24. Of these, the day type wheel 24, which engages with the date clutch wheel 15 via the date speed reduction wheel 18, is connected to the hour type wheel 23 as well as the day type wheel 24. The minute wheel 22, which is loosely fitted onto the wheel shaft 21 and meshes with the minute clutch wheel 13 via the minute reduction wheel 17, is connected to the hour wheel 2.
They are arranged adjacent to each other in a loosely fitted state on the boss portions 23a of No. 3.

The reference numeral 25 in the figure is a ratchet wheel for driving the time type wheel 23, which is connected to the end of the boss portion 23a so as to rotate integrally with the time type wheel 23.As seen in FIG. The 24 ratchet teeth provided on the circumferential surface of 25 have a reverse stopper pawl 26.
and the feed claw 27 are engaged with each other. This feed claw 27
is pivotally supported on the arm end 28b of the feed lever 28 which is pivotally supported on the fixed shaft 29, and the feed lever 28
By sliding the cam follower 28a at the other end on the circumferential surface of the maggot-shaped cam 22a integrated with the printing wheel 22 and swinging it, the ratchet wheel 28a is rotated once every hour.
5 is moved with a claw, and the time type wheel 23 integrated therewith is moved by one frame in the clockwise direction in the figure.

On the other hand, in FIG. 3, a watch top plate 31 is provided on a plane parallel to the plane of the paper, that is, a plane perpendicular to the front side plate 1 and the rear side plate 2. FIG. 4 shows the sun back mechanism 30 on this upper plate 31.
A date wheel 35 that engages with an hour hand wheel 33 and a minute hand pinion 34 is disposed between a dial 32 provided at a distance in front of the upper plate 31. Reference numeral 35 denotes an intermediate transmission wheel 36 that meshes with the crown gear 17a integrated with the minute reduction wheel 17 (FIG. 4).
is coupled to the pinion 36a through a pinion 36a, thereby transmitting rotation to the hour hand 37 and minute hand 38 at a ratio of 1:12.

Next, the step-up mechanism 40 that operates by obtaining driving force from the daily printing type wheel 24 will be explained. By engaging the tip of a cantilever-shaped pawl piece 41a attached adjacent to the cantilever-shaped claw piece 41a punched out on its surface with the internal ratchet tooth 24a provided on the side surface of the daily printing wheel 24, Each time the type wheel 24 rotates in the direction of the arrow in the figure, it is configured to move stepwise in the same direction.

By the way, FIG. 7 shows a printing mechanism 50 provided at the rear inside of the device main body 4.
0, there is a guide groove 2b in the rear side plate 2 so that a card guide 49 that guides the card c inserted from above the device main body 4 can move in the axial direction along the circumferential surface of the type ring group 20. is installed on. A hammer 51, which rotates around a pin 51a as a fulcrum, is disposed on the back side of the hammer 51 with its tip located near the contact area between the peripheral surface of the type ring group 20 and the card c, and is connected to a plunger 52a. It is configured to be driven by a solenoid 52 operated by a card detection switch 47 via a swinging lever 53.

FIG. 1 shows an embodiment of a drive circuit for controlling the operation of the same device, and is designated by the reference numeral 61 in the figure.
is a power supply unit that converts the commercial power supply into DC and supplies it to the solenoid driver 71, the control unit 62, the motor driver 70, the display driver 72, and the pulse generation circuit 74 via the secondary battery 61a that is charged in a floating state. configured to supply. The control unit 62 includes a clock circuit 6 that generates a reference clock signal.
2a, a CPU 62b, a ROM 62c that stores a control program that manages its operation, and a RAM 62d that stores the time at the start of a power outage, and a card detection switch 48 and a power outage detection circuit 6.
3, and is configured to output a clock signal to a display driver 72 and a motor driver 70, and output a print command signal to a solenoid driver 71. 74 is a pulse train generation circuit which outputs the number of drive pulse trains necessary to rotate the pulse motor once in synchronization with the signal output from the clock circuit 62a every minute, and has a low repetition rate when changing the date; In addition, the drive pulse train is configured to output a drive pulse train having an opposite phase.

Next, the operation of the apparatus configured as described above will be explained based on the timing chart shown in FIG.

When the commercial power supply is connected to the power supply section 61, the power failure detection circuit 63 outputs an L level signal, so that each section is supplied with power from the commercial power supply. When a minute-by-minute signal is input from the clock circuit 62a to the pulse train generating circuit 74, the pulse train generating circuit 74 outputs the number of pulses to rotate the pulse motor 19 once. As a result, the clutch wheel 12, which rotates clockwise in the figure via the pinion 19a, rotates the dividing type wheel 22 by one character through the minute clutch wheel 13c and the minute speed reduction wheel 17, and rotates the dividing type wheel 22 by one character. During the next rotation when the letters on the stepped part of the type ring 22 show "59," the cam follower 28a is dropped from the circumferential surface of the cam 22a that rotates integrally with the cam follower 28a, and the feed lever is swung, causing the tip of the cam follower 28a to be rotated. The pawl 27 advances the ratchet wheel 25 by one tooth, and when it rotates integrally with the ratchet wheel 25, the type wheel 23 is moved by one tooth.
Rotate for hours.

On the other hand, the crown gear 17 of the minute clutch wheel 13c
The transmission wheel 36 that meshes with the wheel a transfers this rotation to the sun wheel 3.
5 to advance the minute hand 38 and hour hand 37 by a minute corresponding to one minute.

In this way, when the time reaches 12:00 a.m., the clock circuit 62a outputs a signal immediately after the above operation is completed, and the pulse train generation circuit 74 drives the pulse train with an opposite phase and a lower repetition frequency than the positive phase. Outputs pulses.

As a result, the step motor 19 rotates at a low speed in the opposite direction, and the date clutch wheel 14, which had been stationary, is sent to the clutch teeth provided on the date feed barrel 12a of the clutch wheel 13 and rotates, causing the date to slow down. car 1
8, the daily printing wheel 24 is advanced by one day. On the other hand,
When the daily type wheel 24 rotates, the first stage raising wheel 41 rotates via the claw piece 41a that engages with the ratchet internal teeth 24a, and the second stage raising wheel 42 meshes with this.
The rack feed gear 42a moves the rack rod 42 to 1.
Starts the lifting operation. Incidentally, as the rack rod 43 is pulled up, a large load is placed on the step motor 19. However, since the pulse motor 19 is operated by driving pulses with a low repetition frequency as described above, its output torque is high, and the step motor 19 has a high output torque. To pull up a rack rod 43 without causing tension.

In this way, when the day switching operation is completed, the pulse train generation circuit 74 outputs a drive pulse with a positive phase in response to a minute-by-minute signal from the clock circuit, and the pulse motor 19 rotates in the forward direction (Fig. 2 I). .

By the way, while the pulse motor 19 starts rotating in response to a minute-by-minute signal from the clock circuit 62a and moves the minute print wheel 22 toward the next print character,
When the supply of commercial power is cut off due to a power outage, etc., the output signal from the power outage detection circuit 63 is reversed from L level to H level, which causes the solenoid driver 71 to become inactive and the control unit 62 and motor driver to be inactive. 70, the display driver 72, and the pulse generation circuit 74 are supplied with power from the auxiliary power supply 61. The motor driver 70 continues to power-amplify the drive signal from the pulse train generation circuit using the power of the auxiliary power supply 61a and supplies it to the pulse motor 19, and the number of motor drivers 70 corresponds to the signal output every minute by taking over the drive signal just before the power outage. The drive pulse is outputted to rotate the pulse motor 19 and feed the type wheel group 20 by one frame. The CPU 62b prevents the auxiliary power source 61a from being consumed by keeping the motor driver 70 inactive until the power supply is restored when one frame has been completely fed. By driving the type wheel 22 by the auxiliary power source 61a, the type is completely fed to the proper position facing the printing hammer 51, so when the commercial power is restored and a drive signal is received from the motor driver 70, , the type wheel 22 is rotated from its normal position in synchronization with the drive signal. (Figure 2 II).

On the other hand, circuit elements with low power consumption, such as a control unit and a display driver, receive power from the auxiliary power supply to maintain their operating state and continue clocking during a power outage period.

In this embodiment, the type wheel has been described, but it goes without saying that other drive mechanisms such as the step raising mechanism are also fully fed while waiting for the power outage to be restored.

(Effects) As described above, according to the present invention, when the supply of commercial power is cut off while the motor that drives the wheel train or ratchet mechanism is rotating, the power is switched to the auxiliary power.
Since the cycle is completed continuously,
The transmission mechanism connected to the motor can be stopped in a meshed state, and when the drive signal is restarted, there is no misalignment with the printing wheel, making accurate printing possible.

[Brief explanation of drawings]

Fig. 1 is a block diagram of a device showing an embodiment of the present invention, Fig. 2 is a timing diagram showing the operation of the same device, Fig. 3 is a sectional view showing the main parts of the time recorder according to the present invention, and Fig. 4 5 is an exploded perspective view showing this clutch mechanism, and 6
The figure is a plan view of a ratchet wheel drive wheel, No. 7.
The figure is a side view of the printing mechanism. 10...Clutch mechanism, 12...Clutch vehicle,
13...minute clutch car, 15...day clutch car,
17, 18... Deceleration car, 20... Type ring group, 25
. . . Clutch wheel for time type wheel drive, 40 . . . Step raising mechanism, 41 . . . 1st stage lifting wheel, 42 . hammer.

Claims (1)

[Scope of utility model registration request] A time marking mechanism including a type wheel driven via a transmission mechanism from a motor that rotates based on a clock signal, a motor drive circuit that is normally operated by commercial power, a clock circuit that generates a clock signal, and a power outage. When a power outage of the commercial power supply is detected while the motor is rotating, the power supply to the motor drive circuit is switched to the auxiliary power supply and the rotation operation by the commercial power supply is taken over. Continue to feed until the cycle is completed, and use the auxiliary power supply to feed 1
A time recorder equipped with a control circuit that disconnects the auxiliary power supply and the motor drive circuit when the cycle is completed.