JPH0110678Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a paper feeding device for an electronic time recorder.

[Prior Art] A conventional stage feeding device for feeding the printing stages of a time recorder is, for example, as described in Japanese Utility Model Publication No. 10971/1983, where the date is rotated by a feeding claw operated by a solenoid. By meshing with the feed gear, the card receiving lever is moved one stage per day and the card receiving lever is moved at a constant pitch to determine the printing stage.

In advanced models, when a card detector detects the insertion of a card, the card feed motor is driven and the card feed roller moves the card along a guide path into a time recorder, as shown in Japanese Patent Application Laid-Open No. 60-24688. The card is fed into the card, and the printer prints employment data at a predetermined position on the card.

[Problems with the Prior Art] A motor such as a stepping motor whose rotation angle can be controlled is used to feed and feed the card.

However, using a stepping motor as a card feeding motor is expensive and cannot be used for low-priced products.

Furthermore, when an inexpensive DC motor is used as a card feeding motor, errors occur in the accuracy of the printing position on the card, and the printing position tends to shift vertically.

The disadvantage of using this inexpensive DC motor as a card feed motor is that the rotation angle cannot be controlled, making it difficult to control the motor's stopping position, and errors in the characteristics of the DC motor itself.
The problem is that speed fluctuations due to load fluctuations in the card feeding mechanism cannot be absorbed.

As a result, when the card is moved and stopped,
This method could not be adopted because it was difficult to adjust the printing position so that it was always constant.

[Problems to be Solved by the Invention] An object of the present invention is to solve the problems of the prior art and provide a paper feeding device for an electronic time recorder with good performance.

[Means for solving the problem] The means of the present invention utilizes a DC motor with a brake for card feeding, and links the motor with a device that converts the amount of rotation into a signal train and transmits it to the control unit.
The card is fed a certain number of signals before the print position that has already been set, and from this point to the print position, the card feed motor is decelerated and the card is fed for a short time several signals before the print position. A means for applying reverse power to the motor, and a control section that counts the signal string during this period, judges the signal width, and applies a brake to the card feed motor when the signal width reaches a certain width. It is.

[Operation] The signal train output from the encoder sensor 4 linked to the card feed DC motor with brake is transmitted to the reference position identification sensor 6 during card feed movement.
From the moment when the card detects the reference position of the card, the controller 1
1 and used as a means to confirm the position of the card, and also provides a mechanism to judge the signal width of the signal train, and reversely rotates the power supply of the card feed motor 2 with a pulse just before the timing to stop the card. Switch to connection (reverse connection). The card feeding device operates in the direction of sudden braking by connecting the card feeding motor 2 in reverse rotation, and the rotational speed of the counting disk 5 provided on the motor shaft is also reduced, and the signal detected by the encoder sensor 4 is , the signal width gradually becomes wider. When the signal width reaches a certain width, the reverse rotation connection of the card feed motor 2 is turned off and the circuit is opened.

[Example] Embodiments of the present invention will be described with reference to the drawings.

In FIG. 1, 1 is a side plate that supports a paper feed mechanism, etc., and 2 is a paper feed motor that operates the paper feed section of the paper feed mechanism 13. Reference numeral 3 denotes a paper insertion detection switch that transmits information to the control unit 11 shown in FIG. 5 in the figure is a counting disk that functions as an encoder in combination with the sensor 4;
6 is a reference position identification sensor that identifies a specific position on the paper and transmits the information to the control unit; 7 is a group of reduction gears that reduces the rotation speed of the paper feed motor 2 to a rotation speed suitable for feeding the paper; 8 is a reduction gear Directly connected to gear group 7,
The paper feeding roller 9 is a brake made of a coil spring wound around the shaft 8' of the roller 8, and the motor 2, reduction gear group 7, feeding roller 8, and brake 9 constitute a paper feeding mechanism 13. 10 is an insertion slot into which paper is inserted manually; 14
Reference numeral 12 indicates a printing mechanism, and in the circuit block diagram of FIG. 2, reference numeral 12 indicates a motor forward/reverse driver.

Figure 3 is a timing chart for paper feed, and Figure 4 is a flowchart for time recorder printing processing. To explain this, first, when paper is inserted, the [Y] paper feed motor rotates forward to feed the paper. I send it in, but if it doesn't get inserted [N]
Paper feed motor does not rotate.

When the next fed paper is detected by the paper reference position sensor, the [Y] paper feed amount calculation encoder sensor starts counting the number of signals, but if the paper has not been fed to the paper reference position sensor, [N] The paper feed motor continues to rotate forward.

Next, when the count of the number of signals reaches the print position K value (paper feed deceleration start position), the paper feed device is decelerated [Y], but if the K value has not been reached, the number of signals is counted until it reaches [N]. However, the paper feed motor continues to rotate forward.

Next, when the printing position is reached, [Y] the paper feed motor is connected to reverse rotation (switched to the power supply).
The paper feed device is braked, but when the print position has been reached, [N] deceleration paper feed continues.

Next, when the signal width of the encoder sensor becomes wide to a certain extent, [Y] paper stop brake processing is performed. Once stopped, print processing begins.

[Operation] When paper is inserted into the insertion slot 10 of the time recorder, the sensor 3 first detects the paper and the controller 1
transmit a signal to 1. Thus paper feed motor 2
When the paper first rotates, the paper feed mechanism 13 driven by this and a motor automatically moves the paper to a predetermined printing position. The rotation amount of the motor is transmitted to the control unit 11 by changing the signal from the encoder combined with the encoder sensor 4 and the counting disk 5 provided on the motor. After detecting a card with a reference position identification sensor 6 at a preset printing position, signals are counted, and the paper is fed until a certain number of signals are ahead. In order to prevent the paper from shifting (overshooting) from this position, the paper feed motor is decelerated and a few signals before the stop position, the power supply for the paper feed motor 2 is connected in reverse rotation to apply sudden braking.

As the speed of the paper feed motor 2 decreases, the signal width becomes wider, and when the signal width is determined and the determined signal width is reached, the power to the motor is turned off. When printing is completed, the power is turned on and the machine rotates in the opposite direction to feed the paper.

[Effects of the invention] According to the device of the invention, the counting disk 5,
The encoder sensor 4 sends a signal to the control unit 11
Once the paper has moved, the program in the control unit 11 performs continuous forward rotation → low-speed rotation (brake control) → forced control, making it possible to control the paper until it stops, reducing manufacturing costs. It is possible and has high practical value.

[Brief explanation of the drawing]

The drawings show an embodiment of the paper feeding device of the electronic time recorder according to the present invention, and FIG. 1A is a perspective view of the machine body, FIG. 1B is a perspective view of a part incorporating a printing device, FIG. 2 is a circuit block diagram, FIG. 3 is a timing chart during paper feeding, and FIG. 4 is a flow chart during printing processing of the time recorder.

Claims (1)

[Scope of utility model registration request] A sensor that detects when paper is inserted into an insertion slot, a paper feed motor that starts rotating in response to a signal detected by the sensor, and a mechanism that converts the amount of rotation of the paper feed motor into a signal train and transmits it to a control unit. , a paper feed device interlocked with the paper feed motor, an identification sensor for a card reference position moved by the paper feed device, and a card feed speed controlled to switch the paper feed motor to reverse rotation for a short time before reaching a stop position. A paper feed device for an electronic time recorder comprising means for applying an electric brake and controlling said time.