JPH087490Y2 - Time recorder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial application field) The present invention relates to a printing error prevention technique in a time recorder.

(Prior Art) A time recorder rotates a type wheel according to the date and time by a motor that is driven in synchronization with a clock signal from a clock circuit, while a card detector that detects insertion of a card detects a print hammer by a signal. It activates and prints the current date and time on the card.

By the way, when a card is inserted and printing is performed while the type wheel is driven by the clock signal and the type wheel is moving, there is a problem in that the characters printed on the card are displaced. In order to solve such a problem, for example, as disclosed in Japanese Utility Model Publication No. 51-51288, measures are taken to detect the movement of the type wheel and prohibit printing during the movement of the type wheel.

On the other hand, before the card reaches the print reference position, there is a slight error between the card position where the card detector detects the insertion of the card and outputs a signal and the print reference position of the type ring. In addition, there is a problem in that a signal is output from the card detector and the print hammer operates, causing print misalignment.

In order to solve such a problem, for example, Japanese Patent Publication No. 55-489
As seen in Japanese Patent Publication No. 93, in the field of printing, a paper sheet detector that detects the insertion of a paper sheet and outputs a signal, and a paper sheet detection signal are required for the paper sheet to reach the printing unit. It is also known that a delay circuit for delaying by time is provided and printing is performed by a signal from the delay circuit.

If such a technique is applied, it may be possible to correct the error between the card position where the card detector detects the card and outputs a signal, and the print reference position of the card. In this case, since the user needs to pull back and take out the card after printing is finished, there is an operation mistake that the card is mistakenly inserted again in the printing direction during drawing.

In such a case, since the signal is again output from the card detector, printing may be performed again at the position printed immediately before, and the characters may not be readable.

(Problems to be Solved by the Invention) The invention of the present application has been made in view of such a problem, and its purpose is to make sure that the card is correctly set at the reference position and the type ring is stationary. By providing a new time recorder that can prevent the printing deviation by printing the date and time data in the state that it is in the state, and can surely prevent the double hitting of the date and time data due to the card drawing error after printing is completed. is there.

(Means for Solving the Problem) In order to solve such a problem, in the present invention,
A type wheel for printing the time, a drive circuit that drives the type wheel by a carry signal from a clock circuit, a card detector that outputs a signal when a card is inserted, and a signal from the card detector that is delayed. A delay circuit, a pulse generation circuit that receives a signal from the delay circuit to generate a pulse having a constant time width, a drive signal generation circuit that generates a drive signal according to the leading edge of the pulse, and a drive signal generation circuit When the drive hammer and the carry signal overlap with each other, the output of the signal from the drive circuit is prohibited, and the drive circuit causes the printing wheel to operate after the drive signal ends. Drive
Further, when the carry signal and the signal from the delay circuit are generated in duplicate, the control circuit prohibits the operation of the print hammer by the drive signal and operates the print hammer after the movement of the type wheel is completed. Prepare

(Operation) When the carry signal is duplicated during the generation of the drive signal, the output of the signal from the drive circuit is prohibited, and the type circuit is operated by the drive circuit after the stop of the drive signal,
Also, when the carry signal and the signal from the delay circuit overlap, the operation of the print hammer by the drive signal is prohibited, and the print hammer is operated after the end of the movement of the printing wheel to prevent printing during the movement of the printing wheel. Block.

In addition, the signal from the delay circuit is converted into a pulse signal of a constant time width by the pulse generation circuit, and the drive signal generation circuit is operated by the leading edge of this pulse, so the following The output of the pulse signal becomes impossible, the drive signal generating circuit does not operate, and thus the double striking due to an error in pulling out the card after completion of printing is prevented.

(Embodiment) Therefore, the details of the present invention will be described below based on an illustrated embodiment.

FIG. 4 shows a central portion of a time recorder to which the present invention is applied. This mechanism is roughly classified into a clutch mechanism 10 driven by a step motor 19 and a type wheel driven by the clutch mechanism 10. The day back mechanism 30 that transmits rotation to the hands 37 and 38 via the group 20 and the minute reduction gear 13 (the fifth
8) and a printing mechanism 50 that prints the date and time on the inserted card c, as shown in FIG. It is composed of and.

Next, the detailed mechanism of each of these parts will be explained.
On the clutch axle 11 supported between the front side plate 1 and the rear side plate 2, a clutch wheel 12 meshing with a pinion 19a fixed to the shaft of a step motor 19 is loosely fitted, and the clutch axle is
A clutch clutch wheel 13 axially biased by coil springs 14, 14 interposed between the front side plate 1 and the rear side plate 2 and a date clutch wheel 15 are loosely fitted into the clutch 11 so as to sandwich the clutch wheel 12. Has been done.

FIG. 6 is an exploded view of the clutch mechanism 10 described above. On both sides of the clutch wheel 12, there are integrally provided a minute feed cylinder 12a and a date feed cylinder 12b, each having end faces with mutually opposite clutch teeth. The minute clutch wheel 13 and the date clutch wheel 15 are formed so as to project.
When the clutch wheel 12 is formed to project, and the clutch teeth provided on each of these end faces are meshed with each clutch tooth of the clutch wheel 12, when the clutch wheel 12 makes one rotation in the clockwise direction in the figure, , The minute clutch wheel 13 meshed with the minute feed cylinder 12a rotates one minute dividing wheel 22 to be described later through the minute reduction wheel 17 (FIG. 4), and the clutch wheel 12 at midnight in the figure. When rotated in the counterclockwise direction, the date clutch wheel 15 meshed with the date feeding cylinder 12b moves the date dial wheel 24, which will be described later, through the date reduction wheel 18.
It is configured to rotate by a frame.

Returning to FIG. 4 again, the type wheel group 20 for printing the date and time on the required position of the time card C is from 0 to 59, 1 to 1 on the circumferential surface.
Numbered ring 2 of the same diameter with the numbers 24 and 1 to 31 protruding.
2, the hour print wheel 23, the day print wheel 24, among these, the day print wheel 24 that meshes with the date clutch wheel 15 via the date reduction wheel 18 moves on the print wheel axis 21 together with the time print wheel 23. The divided character wheels 22 that are fitted and mesh with the minute clutch wheel 13 via the minute reduction wheel 17 are arranged adjacent to each other while being loosely fitted on the boss portion 23a of the hour character wheel 23.

Reference numeral 25 in the drawing is a ratchet wheel for driving the time-character wheel, which is joined to the end of the boss portion 23a so as to rotate integrally with the time-character wheel 23. As shown in FIGS. The reverse rotation stop claw 26 and the feed claw 27 are engaged with 24 ratchet teeth provided on the peripheral surface of the ratchet wheel 25. The feed claw 27 is an arm end 28b of a feed lever 28 pivotally supported by a fixed shaft 29.
The cam follower 28a at the other end of the feed lever 28 is pivotally supported on the ratchet-shaped cam 22a which is integral with the dividing wheel 22 and is swung so that the ratchet rattles once an hour. The wheel 25 is claw-fed and the hour wheel 23, which is integral with the claw-wheel 25, is moved in the clockwise direction in the figure by one frame.

On the other hand, in FIG. 4, a plane parallel to the plane of the drawing, that is, a plane orthogonal to the front side plate 1 and the rear side plate 2, is provided with a watch upper plate 31.
Is provided. Fig. 4 shows the mechanism behind the sun on the upper plate 31.
30 is shown, and between the dial 32, which is provided on the front face of the upper plate 31 with a space therebetween, an hour hand wheel 33 and a minute hand pinion are provided.
The back car 35 of the day that meshes with 34 is arranged, and the back car of this day
35 is configured to be coupled via a pinion 36a with an intermediate transmission wheel 36 that meshes with a crown gear 17a that is integral with the minute reduction gear 17, thereby transmitting rotation to the hour hand 37 and the minute hand 38 at a ratio of 1:12. ing.

Next, a description will be given of the step-up mechanism 40 that operates by receiving the driving force from the date type wheel 24 (Fig. 8). The type wheel shaft 21 has the first step-up wheel 41 that constitutes the step-up mechanism 40. By being attached adjacent to the Nikka ring 24, the tip of the cantilevered claw piece 41a punched on the surface is engaged with the ratchet internal teeth 24a provided on the side surface of the Ni ring 24, Each time the daily printing wheel 24 rotates in the direction of the arrow in the figure, it is configured to make a step movement in the same direction.

By the way, FIG. 8 shows the printing mechanism 50 provided in the rear of the inside of the apparatus main body 4, and in the vicinity of the rear face of the type wheel group 20,
A card guide 49 for guiding the card c inserted from above the device body 4 is mounted in the guide groove 2b of the rear side plate 2 so as to be movable in the axial direction along the peripheral surface of the type wheel group 20.
A hammer 51, which pivots about a pin 51a as a fulcrum, is arranged on the rear surface thereof with its tip positioned in the vicinity of the contact portion between the peripheral surface of the type wheel group 20 and the card c, and the plunger 52a.
It is configured to be driven by a solenoid 52 that operates based on a signal from a card detection switch 47 that is operated by the movement of a switch lever 48, via a swing lever 53 that is coupled with.

FIG. 1 shows an embodiment of the present invention, in which reference numeral 60 is an oscillator circuit for outputting a clock signal, and 61 is an oscillator circuit.
A frequency divider circuit that divides a clock signal to generate a clock signal, a correction pulse signal, and a pulse motor driving pulse, 62 receives a clock signal input, and outputs a minute signal every 1 minute and every 24 hours, A clock circuit that outputs a day signal, that is, a shift signal. 63 is a pulse train generation circuit, the time correction pulse output from the input control circuit 66 based on the operation of the hour / minute feed switch 64 and the date feed switch 65, the minute signal and the date signal from the clock circuit 62 are terminals Tm, The signal is input to the terminal Td, the motor drive signal is output corresponding to these signals, and the motor drive signal is output while the solenoid drive signal from the solenoid control circuit 67 described later is being output. It is configured to pause. 67 is the aforementioned solenoid control circuit, which outputs a solenoid drive signal to the solenoid driver 68 at the time when the card detection switch 47 is actuated and a signal is output from the erroneous printing prevention circuit 80 described later, while the pulse train generation circuit 63 While the motor driving signal is being output, the solenoid driving signal is temporarily stopped from being output for the time required to feed the type wheel group by one frame.

80 is a card detection switch 47 and a solenoid control circuit 67
In printing prevention circuit erroneously connected between, made a series circuit of delay circuits 80a and the one-shot multi-80b as shown in FIG. 2, a predetermined time T ₁ card detection switch 47 becomes the operative state has elapsed At this time point, the one-shot multi 80b is activated to output a continuous pulse signal of time T ₂ .

In the figure, reference numeral 69 denotes a motor driver, and 81 to 83 denote waveform shaping circuits.

Next, the operation of the apparatus thus configured will be described based on the timing chart of FIG.

When the minute signal from the clock circuit 62 is input to the pulse train generating circuit 63, the number of pulses for rotating the step motor 19 once is output. As a result, the clutch wheel 12 rotating clockwise in the figure via the pinion 19a, the minute clutch wheel 13c,
The character division wheel 22 is rotated by one character pattern via the minute reduction wheel 17, and the character type of the step portion of the character division wheel 22 facing the tip of the hammer 51 is "5".
At the next one rotation shown by 9 ", the cam follower 28a is dropped from the peripheral surface of the cam 22a which rotates integrally with the cam 22a to swing the feed lever, and the feed pawl 27 at the tip thereof moves the ratchet wheel 25 to one tooth. Minute type feed, time type ring that rotates integrally with this
Rotate 23 for 1 hour.

Now, when the time card c is inserted at the time when the rotation of the type wheel group 20 is completed, the tip of the card c comes into contact with the switch lever 48 (FIG. 8) of the card detection switch 47 and the card detection switch 47 moves. It becomes the operating state and outputs the signal P ₁ .
This signal P ₁ is delayed by the time T ₁ by the delay circuit 80a of the erroneous printing prevention circuit 80.

During this time T ₁ , the card c moves further downward and pushes down the lever 48 of the detection switch 47 to the limit point, and is accurately positioned at this position. When time T ₁ elapses,
A pulse signal of time T ₂ is output from the one-shot multi 80b. The solenoid control circuit 67 operates at the leading edge of the pulse signal from the erroneous printing prevention circuit 80 and outputs a solenoid driving signal, and the printing hammer 51 prints the date / hour / minute at a specified position on the card c. . This prevents printed characters from being displaced in the vertical direction (I).

By the way, when printing is completed, if the card is accidentally pushed down in the middle of pulling up the card to remove the card c, the lower end of the card again contacts the switch lever 48 of the card detection switch 47 and the card detection switch 47 The signal P ₁ 'is output. However, during this period, the pulse signal of the time T ₂ is still output from the washout multi 80b, so the solenoid control circuit 67 cannot operate the printing hammer 51 in the inoperative state. When the next card is inserted after the time T ₂ required for one printing operation has elapsed, the signal from the erroneous printing prevention circuit 80 has disappeared at this point, so the solenoid control circuit 68
Ready to print. This gives the card c
It is prevented from hitting twice (II). Then, immediately before the card is inserted and the detection switch 48 is operated, a carry signal such as a minute signal or a day signal is output from the clock circuit 62,
When the motor drive signal is output from the pulse train generation circuit 63, the solenoid control circuit 67 deactivates the print hammer 51 even though the card detection switch 48 is activated due to the motor drive signal deactivating state. To do. In this way, when the type wheel group is cut off by the minute signal or minute signal corresponding to the hour signal and the motor drive signal from the pulse train generation circuit 63 stops, the solenoid control circuit 67 becomes operable and is changed now. Card c
Print the date, hour, and minute on.

Also, when the minute signal or the day signal is output from the clock circuit 62 at the moment when the card is inserted and the solenoid drive signal is output from the solenoid control circuit 67, the pulse train generation circuit
Reference numeral 63 keeps the step motor 19 in a stationary state by maintaining a non-operation state by inputting a solenoid driving signal. In this way, when the operation of the print hammer 51 is finished and the output of the solenoid drive signal is stopped, the pulse train generation circuit 63 outputs the motor drive signal corresponding to the minute signal or the date signal input previously to print the characters. The step motor 19 is rotated so that the wheel group 20 coincides with the time. While the step motor 19 is rotating, the solenoid control circuit 67 receives the motor drive signal as described above, so the printing operation is temporarily stopped.
After the correction, the print hammer 51 is driven to print the date and time.

On the other hand, when the time is 0:00 am, the clock circuit 62 outputs a day signal, and the pulse train generation circuit 63 outputs a motor driving signal having a phase opposite to that of the minute signal and having a low repetition frequency. As a result, the step motor 19 rotates at a low speed in the opposite direction to the previous one, so
14 is rotated by being sent to the clutch teeth provided on the date feeding cylinder 12a of the clutch wheel 13, and advances the day letter wheel by one day via the date reduction wheel 18. When the date wheel 24 rotates, the first step-up wheel 41 rotates via the pawl piece 41a that engages with the ratchet internal teeth 24a, and the rack feed gear 42a is engaged with the second step-up wheel 42 that meshes with the ratchet wheel 42a.
Then, the rack rod 42 is pulled up by one amount and the operation is started.

In this embodiment, the misprint prevention circuit is composed of the delay circuit 80a and the one-shot multi 80b,
In short, it is sufficient to adopt a configuration in which the signal is output after the time T _{1 has} elapsed from the time when the signal was input, but the new signal is not output during the time T 2 after the signal is output.

(Effect) As described above, according to the present invention, the type wheel for printing the time, the drive circuit for driving the type wheel by the carry signal from the clock circuit, and the card for outputting the signal by inserting the card. A detector, a delay circuit that delays the signal from the card detector, a drive signal generation circuit that generates a drive signal based on the signal from the delay circuit, a printing hammer that operates by the drive signal, a drive signal and a carry. When the signal overlaps with the signal, the output of the signal from the drive circuit is prohibited, the type wheel is driven after the drive signal is stopped, and when the carry signal and the signal from the delay circuit overlap, the printing is performed. Since it is equipped with a control circuit that prohibits the operation of the hammer and operates the print hammer after the movement of the type wheel is completed, the operation start position of the card detector It is possible to print at an accurate position regardless of the deviation between the card and the reference position of the card, and in a state where the printing wheel is stationary.

Also, the signal from the delay circuit is converted into a pulse signal with a constant time width by the pulse generation circuit, and the drive signal generation circuit is activated by the leading edge of this pulse, so it is caused by a card pulling error after printing is completed. It is possible to reliably prevent the double hitting.

[Brief description of drawings]

1 is a block diagram of an apparatus showing an embodiment of the present invention, FIG. 2 is a block diagram showing an embodiment of an erroneous printing prevention circuit, and FIG. 3 is a timing diagram showing the operation of the apparatus shown in FIG. FIG. 4 is a sectional view showing the main part of the time recorder according to the present invention, FIG. 5 is a sectional view of the sun-rear mechanism, FIG. 6 is an exploded perspective view showing this clutch mechanism, and FIG. A plan view of the ratchet wheel and FIG. 8 are side views of the printing mechanism. 10 …… Clutch mechanism, 12 …… Clutch car 13 …… Minute clutch car, 15 …… Day clutch car 17,18 …… Deceleration car, 20 …… Type wheel group 25 …… Hour type wheel drive clutch car 40… … Step-up car, 42 …… Second step-up car 43 …… Rack rod 47 …… Card detection switch 48 …… Switch lever, 49 …… Card guide 51 …… Hammer 80 …… Incorrect printing prevention circuit

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Tadashi Ishikawa, 934-13 Shikato, Yotsukaido, Chiba Prefecture, Seiko Optical Co., Ltd. Incorporated (72) Inventor Atsushi Takami 934-13 Shikato, Yotsukaido-shi, Chiba Seiko Optical Co., Ltd. (56) Reference JP 57-48178 (JP, A) JP 51-14405 (JP) , B1) Actual Public Sho 51-51288 (JP, Y1) Special Public Sho 55-48993 (JP, B2)

Claims (1)

[Scope of utility model registration request] 1. A type wheel for printing time, a drive circuit for driving the type wheel by a carry signal from a clock circuit, a card detector for outputting a signal when a card is inserted, and the card detector. A delay circuit for delaying the signal from the pulse generator, a pulse generation circuit for receiving a signal from the delay circuit and generating a pulse having a constant time width, a drive signal generation circuit for generating a drive signal according to the leading edge of the pulse, A print hammer which is operated by a drive signal from a drive signal generating circuit, and when the drive signal and the carry signal overlap, the output of the signal from the drive circuit is prohibited and the end of the drive signal is terminated. When the drive circuit drives the type wheel, and when the carry signal and the signal from the delay circuit are generated in an overlapping manner, the print handle by the drive signal is generated. And a control circuit for prohibiting the operation of the marking circle and for activating the printing hammer after the movement of the type wheel is completed.