JPH0248924Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a media processing device that has a mechanism for sucking in, transporting, and discharging a medium, and performs processing such as printing or reading on the medium.

(Prior Art) Conventionally, in a device that has a mechanism for sucking, transporting, and discharging a medium of varying length and performs processing such as printing or reading, the medium is transferred to the suction port after printing or reading is completed. It was configured so that the exhaust was always carried out through the inlet.

When a medium is inserted through the suction port, the medium is detected by a sensor, the upper and lower surfaces of the medium are clamped by rollers, and the medium is transported and processed by the rollers. When the processing is completed, the medium is conveyed by rollers to the same position in the suction port as when it was inserted, and the clamps of the upper and lower rollers are removed.

(Problem to be solved by the invention) Conventionally, in a media processing device configured such that media is always ejected at the media suction port, media that is sufficiently longer than the length of the device body, such as continuous paper, are When discharging from a state where the media is being conveyed to the
The disadvantages are that the time required for discharging the medium is long and jams and skews are likely to occur when discharging the medium.

(Means for Solving the Problems) The present invention provides a means for detecting the leading edge of the medium in a device that has a mechanism for sucking, transporting, and ejecting a medium of arbitrary length, and performs processing such as printing or reading. and,
A means for clamping the medium on the conveying means, a means for detecting the current position of the conveyed medium, a medium inlet at the front of the device, and a medium outlet at the rear of the device,
and a means for storing the medium position when the medium can be pulled out from the ejection port (ejectable position), and compares the medium position at the end of processing with the ejectable position to determine the medium position at the end of processing. If the position exceeds the possible position, the medium clamp is removed, and if the medium position has not reached the dischargeable position, the medium is conveyed to the suction port and then the medium clamp is removed.

(Function) According to the present invention, when the conveyed medium comes out from the rear discharge port of the device main body, the clamp to the medium is only removed without conveying the medium toward the suction port. The medium can be pulled out by grasping and pulling the tip of the medium coming out of the discharge port. Further, when the medium comes out from both the outlet and the suction port, it is possible to draw it out from either depending on the length of the medium coming out.

(Embodiment) FIG. 1 is a side sectional view of a printer mechanism showing an embodiment of the present invention.

In FIG. 1, 1 is a printer body, 2 is a medium, 3 is an inlet for the medium 2, and 4 is an outlet for the medium 2. 5 is a sensor for detecting the leading and trailing ends of the inserted medium 2. 6 is a roller for conveying the medium 2, 7 is a clamp roller for clamping the medium 2 between the roller 6, and both the roller 6 and the clamp roller 7 are rotatably supported by a frame (not shown). There is. Further, the clamp roller 7 is connected to a clamp magnet 17, which will be described later, and is configured such that the clamp roller 7 clamps the medium 2 by operating the clamp magnet 17. Further, 8 is a stepping motor, and belts 9a and 9b are stretched between the stepping motor 8 and a gear (not shown) fixed to the roller 6, and the rotational power of the stepping motor 8 is transferred to the roller 6. It is structured to convey the following information. 10 is a print head, 11 is a platen, 12
is a lamp that blinks to indicate the completion of the medium ejection operation.

FIG. 2 shows a hardware block diagram of the printer controller.

In FIG. 2, 13 is a memory, which stores programs related to medium position detection, conveyance, printing, etc., and data such as a counter Y indicating the leading edge position of the medium. 14 is a central processing unit (hereinafter referred to as CPU) that controls conveyance of the medium, printing, etc. according to programs and data stored in the memory 13.
The CPU 14 also sends and receives signals from the sensor 5 through an input/output port (hereinafter referred to as I/O port) 15, and further sends a drive signal and an excitation phase command signal to a control circuit 16 that operates the stepping motor 8. A drive signal to a driver 18 that operates the clamp magnet 17, a print command to a print control circuit 20 connected to a print section 19, and print data are sent and received through an I/O port 21. Here, the memory 13 and I/O ports 15 and 21 are connected to the CPU 14 via a common bus 22.

Next, operations during medium suction and printing in the embodiment of the present invention will be described.

FIG. 3 is a flowchart showing the operation of the embodiment of the present invention.

1 to 3, when the operator horizontally inserts the medium 2 into the suction port 3 in the line feed direction, the sensor 5 detects the suction of the medium. CPU14
This transfers a drive signal to the driver 18 and causes the clamp roller 7 to clamp the medium 2 by activating the clamp magnet 17. At this time, the position counter Y of the memory 13 is set to an initial value _y0 .

After the medium 2 is clamped, a drive signal and an excitation phase command signal are sent from the CPU 14 to the control circuit 16, and the stepping motor 8 rotates the roller 6 to transport the medium 2 to a predetermined printing position, and then performs a line feed. Here, the print control circuit 20 is
The printing unit 19 receives printing commands and printing data from the printer 14, operates the printing unit 19, and prints by the printing head 10.

The value y of the position counter Y in the memory 13 is
Each time the CPU 14 sends a drive command that causes the medium 2 to have a one-line feed (hereinafter referred to as a feed), it is increased by 1, and each time the CPU 14 sends a command that causes a one-line feed in the opposite direction (hereinafter referred to as a back feed), it is decremented by 1. . This position counter Y allows the current leading edge position of the medium to be known at all times.

Next, the sensor 5 detects that the trailing edge position of the medium 2 has reached the non-printable position and sends a signal to the CPU 14, or printing is interrupted when the print data ends.

If the value y indicating the position of the leading edge of the medium at the time of printing interruption exceeds the value y _n indicating the position where ejection is possible, which will be described later,
A signal is sent to the driver 18 to unclamp the clamp roller 7. Furthermore, the CPU 14
After receiving a blinking signal from the I/O port 21, the lamp 12 is confirmed to blink, and the medium 2
The medium 2 is pulled and taken out from the longer port depending on the length of the portion protruding from the suction port 3 or the discharge port 4.

If the medium leading edge position y does not exceed the ejectable position y _n , the excitation phase command signal is sent to the control circuit 16 to backfeed the medium until the value of y reaches the initial value y ₀ , and then the clamp Remove the clamp on roller 7. After confirming that the lamp 12 is blinking, the medium 2 is taken out from the suction port 3.

Here, the media ejectable position y _n is set at the leading edge position of the medium 2 where the leading edge of the medium 2 fully protrudes from the discharge port 4 and the operator can grasp the medium, and is the position where the leading edge of the medium 2 is sufficiently protruded from the discharge port 4 so that the operator can grasp the medium. It is determined by the size, running performance of the medium, etc.

In this embodiment, an example in which the present invention is implemented in a printer has been described, but the present invention can also be implemented in other media processing devices such as a reading device, and similar effects and effects can be expected. .

(Effects of the invention) As explained in detail above, the leading edge position of the medium is always detected, the leading edge position when the medium is transported comes out from the rear of the device body, and the medium can be pulled out from the leading direction. In this case, the medium is only unclamped without being conveyed toward the medium suction port, so that the medium can be pulled out from the tip direction. Therefore, it does not take a long time to convey the medium toward the suction port, and since the medium does not have to travel a long distance with rollers, problems such as jamming of the medium, etc. are eliminated, and long media is expelled from the device more quickly,
Since the next medium can be inserted quickly, processing efficiency is improved.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of the side of the printer mechanism showing an embodiment of the present invention, Fig. 2 is a hardware block diagram of the printer controller in Fig. 1, and Fig. 3 is a flowchart showing the operation in Fig. 1. . 2... Medium, 3... Inlet, 4... Outlet, 5
...Sensor, 8...Stepping motor, 13...
...Memory, 14...CPU, 16...Control circuit,
18...driver, 20...print control circuit.

Claims (1)

[Scope of utility model registration request] In a device that has a mechanism for sucking, transporting, and ejecting media of arbitrary length, and performs processing such as printing or reading, a media intake port is provided at the front of the device, a media outlet is provided at the rear of the device, and the leading edge of the media is means for detecting the medium, means for clamping the medium on the conveying means, means for detecting the current position of the conveyed medium, and storing the medium position (ejectable position) when the medium can be pulled out from the ejection port. Compare the medium position at the end of the process with the ejectable position, and if the medium position at the end of the process exceeds the ejectable position, remove the clamp of the medium and set the medium position to the ejectable position. A medium processing device comprising a medium clamp control means for transporting the medium to the suction port and then unclamping the medium if the medium has not reached the position.