JPS6132775A - Recording apparatus - Google Patents

Abstract

PURPOSE:To reduce the cost of a recording apparatus by simplifying a structure and enhancing operability, by allowing one paper feed switch to have paper setting, one-line feed and continuous feed functions. CONSTITUTION:When a paper detector 38 detects such a state that no printing paper 46 is set to a platen 1, the paper 46 is inserted in a paper pan 35 to push a paper feed switchs 42. Whereupon, paper 46 is sent to a printing start position to be set automaically. When the paper detector 38 detects such a state that the paper 46 is set to the platen 1, the paper feed switch 42 is intermittently pushed to feed paper by one line at every one time and continuously pushed to continuously feed paper.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field C] The present invention relates to a recording apparatus, and more particularly to a serial type recording apparatus in which recording is performed by moving a recording head left and right.

[Prior art 1 A schematic structure of a conventional device of this type is shown in FIG.

In FIG. 5, the reference numeral 1 indicates a platen, and a recording plate 2 is disposed opposite the platen.

A paper pressing roller 3 rotatably supported by a shaft 4 is in contact with the platen l.

The shaft 4 is provided at the upper end of an arm 5 for holding paper, and is pressed toward the platen 1 by a spring (not shown).

A paper pan 6 is arranged below the platen 1, and a pinch roller 7 rotatably supported on a shaft 8 is arranged below the paper pan 6.
It can be pressed against and separated from.

A paper edge setting lever 10 fixed to a shaft 11 is disposed alongside the pinch roller 7, and its tip is inserted into the paper pan 6 and engages the tip of the recording paper 14, so that the edge of the paper is placed on the platen l. Set parallel to the axial direction.

- What is indicated by the square symbol 12 is a solenoid, and the other end of the lever 13a connected to the rod 13 is connected to the shaft 9 that supports the lower end of the arm 5. When the rod 13 is attracted, the arm 5 As shown in FIG. 5, the paper pressing roller 3 is rotated in one direction and separated from the platen 1.

This shaft 9 also serves as a guide shaft for the carriage on which the recording head 2 is mounted.

To set the recording paper 14 in the configuration described above, first press the flying switch on the keyboard (not shown) to place the device offline, and then press the paper set lever (not shown). Operate to separate the pinch roller 7 from the platen-1.

At this time, the paper end set lever 1O is brought into pressure contact with the platen 1.

In this state, the recording paper 14 is inserted between the paper pan 6 and the platen l, and its leading edge is brought into contact with the paper edge set lever 1O so that its edge becomes parallel to the platen l.

After that, when the pinch roller 7 is pressed against the platen 1 by operating the heher set lever, the recording paper 14 is moved to the platen 1.
At the same time, the paper edge set lever 10 separates from the platen 1.

After that, when the paper set key provided on the keyboard is pressed, the solenoid 12 is energized, the rod 13 is attracted, the arm 5 is rotated clockwise in FIG. 5 via the lever 13a, and the paper holding roller 3 moves away from platen l.

At the same time, the platen 1 is rotated counterclockwise in FIG. 5, and the recording paper 14 is fed by a predetermined amount.

After the recording paper 14 has been fed by a predetermined amount, the solenoid 12 is de-energized, the paper pressing roller 3 comes into close contact with the platen 1, and the recording paper setting is completed.

By the way, if we take out only the operating procedures from the operations mentioned above, (1) press the offline switch, (2)
) Operate the paper set lever, (3) Insert the recording paper, (4) Operate the paper set lever, (5
) The procedure is to press the paper set key, and the mechanism as a whole is complicated, expensive, and has poor operability, so there is room for improvement.

[Eleventh point] The present invention has been made to eliminate the above-mentioned drawbacks of the conventional printer.It is an object of the present invention to provide a printer that is simple in structure, reduces the number of parts, is inexpensive, and has excellent operability. It is an object.

[Example] Hereinafter, the present invention will be described in detail based on the example shown in the drawings.

1 to 4 explain one embodiment of the present invention, and FIG. 1 shows the overall structure schematically.

In FIG. 1, the reference numeral 21 indicates a grating plate, which is rotatably supported between side plates of an apparatus (not shown), and a pulse motor 22 for paper feeding is connected to one end thereof.

A paper pressing roller 23 is in contact with the platen 21.

The paper pressing roller 23 is rotatably and slidably fitted onto the shaft 24.

The upper ends of arms 25 , 26 are connected to both ends of the shaft 24 , and the lower ends of each arm 25 , 26 are connected to both ends of the carriage guide shaft 27 .

A protrusion 25a is provided at the lower end of one arm 25. ' On the other hand, the symbol 28 is a recording head, and the carriage 2
9, and this carriage 29 is slidably attached to the first carriage guide shaft 27 and another carriage guide shaft 30 arranged parallel thereto. A cam 29a is provided protruding from the edge of the carriage 29 on the arm 25 side. This cam 29a engages with a protrusion 2ja protruding from the lower end of the arm 25, thereby rotating the arm 25, 26 clockwise in FIG.

Note that the left and right arms 25 and 26 are given a rotational force by a spring S in a direction in which the paper pressing roller 23 comes into contact with the platen 21.

On the other hand, the reference numeral 31 indicates a timing belt, which is stretched between a flow pulley 32 and a drive pulley 33, and the drive pulley 33 is fixed to the output shaft of a pulse motor 34.

As shown in FIG. 2, the timing belt 31 is connected to the carriage 29 via a clamp 29b protruding from the lower surface of the carriage 29, and the carriage 29 can move left and right as the timing belt 31 runs.

Also, the reference numeral 35 indicates a paper pan, which is pressed down between the left and right side plates of the device (not shown), and which is placed between the platen 2.
The recording paper is arranged so as to guide the recording paper with a predetermined gap between the recording paper and the lower surface of the recording paper.

A pinch roller 36 is rotatably supported via a shaft 37 below the paper pan 35 and at a position closer to the side where the recording paper is inserted.

The shaft 37 is connected to the platen 21 by a spring (not shown).
The pinch roller 36 is pulled to the side and the paper pan 3
It is configured so that it can fit into the opening formed in the platen 5 and come into contact with the platen 21.

On the other hand, a support stand 39 is located below the platen 21 and at a position corresponding to the opening 35a formed in the paper pan 35.
A paper/sprocket hole detector 38 is disposed through the hole. Further, this opening 35a is located at a position opposite to the sprocket hole when fan-hold paper is used, so the detector 38 can detect the spout hole.

The paper/sprocket hole detector 38 uses, for example, a reflective photointerrupter, and can detect the paper edge, trailing edge, and presence/absence of the recording paper. Moreover, this detector 38 is
When using fan-hold paper, it also has a function to count the number of sprocket holes in this paper.

On the other hand, what is indicated by the reference numeral 41 is an operation panel, which is arranged in a part of the recording apparatus.

This panel 41 has a paper feed switch 42 which serves both paper feed and paper setting. Perform data transfer.

Online switch 43 for instructing to stop. Lamp 44 that displays online status. A power lamp 45 is attached.

Further, the reference numeral 46 indicates recording paper, and the reference numeral 47 indicates a paper pressing plate.

FIG. 6 shows a block circuit of this embodiment, and 50 is an arithmetic storage control unit (hereinafter C
(referred to as PU). The CPU 50 has a rewritable random access memory (RAM) and a non-rewritable read only memory (ROM) area.The RAM area stores recording data, etc., while the ROM area stores recording control procedures. remembered. A carriage motor driver 51 drives the carriage motor 34 in accordance with a command from the CPU 50 to reciprocate the carriage. 5
2 is a reversible counter for detecting the position of the carriage, and counts the same number of pulses as applied to the carriage motor 34.

Here, when the pulse is a positive pulse that moves the carriage in the forward direction, this is added, while when it is a negative pulse that moves the carriage in the backward direction, this is subtracted, and in this way, the position of the carriage is always detected. Reference numeral 53 denotes a paper feed motor driver, which drives the paper feed step motor 22 in response to a command from the CPU, rotates the platen, and feeds the paper by an arbitrary amount.

At this time, the number of pulses applied to the step motor 22 is counted by a paper feed line counter (LC) 54 to detect whether or not line separation feed is currently being performed. Reference numeral 55 is a head driver, which drives the recording head 2 to record on paper according to instructions from the CPU 50. Reference numeral 41 is the operation panel described above, and reference numeral 42 is a control panel for feeding the paper one line, continuously feeding, and setting the paper as described above. There is a paper feed switch for this purpose, and its function is changed by the output of the paper/sprocket hole detector. In addition, if the paper used is fan-hold paper, it also serves as a switch for performing the function of finding the top of the page.

56 is a sprocket hole counter that counts the sprockets detected by the paper/sprocket hole detector 38 when fan-hold paper is used; Each time you count the predetermined number of sprocket holes drilled per
is set to

The contents of the paper feed line counter 54 are corrected by the output of the feed hole count 56.

Next, the operation of the recording apparatus according to the present invention constructed as described above will be explained with reference to the flowchart of FIG.

First, when the power is turned on, if the recording paper 46 is not set, the paper/sprocket hole detector 38 will detect this when the recording paper runs out during recording, and the CPU 50 will put the device in an offline state and issue a paper out warning. For example, an alarm is issued from a buzzer (not shown) or the like, and the online lamp 44 is made to blink.

This state is a state in which the automatic setting of the recording paper 46 is in a standby state.

This situation is shown in FIG. 3(A).

At this time, when the paper feed switch 42 is pressed, the press of the switch 42 is confirmed in step St, and it is further determined in step S2 whether or not the detector 38 has detected paper, but in this case, it is not detected, so step S3 is performed. The carriage driving pulse motor 34 is rotated to move the carriage 29 in the direction of arrow A in FIG. 1 to a paper set position further outside the home position.

Then, the cam 29a moves to the protrusion 25 at the lower end of the arm 25.
a, and in order to push it, the arm 25 rotates clockwise in the figure as shown by arrow C in FIG. 3(B) against the tensile force of spring S as shown in FIG. 3(B). be done.

At this time, the other arm 26 is also rotated in the same direction via the shaft 24.

As a result, the paper pressing roller 23 separates from the platen 21. At this time, in step S4, a timer TI (inside the CPU 50) is set to prevent unnecessary paper feeding operations and starts counting.

Next, in step S5, the platen 21 is rotated by one line in the paper feeding direction by the pulse motor 22, and in step S6
It is determined whether the paper has arrived at the position of the detector 38. Further, in step S7, the value of the timer T1 is compared with a predetermined value T1max (for example, 15 seconds, etc.),
If the value of the timer TI is greater than Tlmaz, the process directly proceeds to step 10 and the carriage is moved to the home position. This is because if no paper is detected after a predetermined period of time has elapsed, it is determined that no paper is loaded and the paper feeding operation is stopped, thereby preventing unnecessary operations from prolonging.

When the operator inserts the recording paper 46 between the platen 21 and the heparpan 35 in this state, the platen 21 and the pinch roller 36 are rotating while being pressed together, so the leading edge of the recording paper 46 is stuck between them. It begins to be sent.

On the other hand, when paper is detected in step S6, the paper feed motor 22 is rotated by a predetermined amount in order to bring the print start line to the front of the head 2 in step S8, and the paper feed line counter LC is set to 0 in step S9. Reset to .

This state is the state shown in FIG. 3(B).

When the rotation of the platen 21 is completed, the carriage 29 returns to the home position, so in step 510 it moves in the direction indicated by arrow B in FIG. 1 and stops.

When the contact between the cam 29a and the protrusion 25a is released, the arms 25 and 26 return to their original positions due to the force of the spring S, and as shown in FIG.
contact with the recording paper 46 in between.

This state is the state in which the recording paper has been set completely.

Next, when the one-sheet feed switch 42 is pressed while recording paper is set, a timer T2 (located in the CPU 50) for page feeding is set to 0 in step 11, and a count is started. After this, the paper is fed and the count value of the paper feed line counter (LC) 54 is incremented by one. Here, this line counter (LC) 54
It is assumed that the value of is memorized as the correct feeding position of the set recording paper.

In step S15, the value of timer T2 is compared with T2max, which is a threshold value for determining whether to perform page forwarding or continuous page forwarding, and if the value of timer T2 exceeds T2wax, it is determined in step 316 whether a perforation hole has been detected or not. It is determined whether or not fan hold paper is set as recording paper. If the paper is fan hold paper, the process advances to step S17 to execute page turning. This page feeding is an operation that automatically feeds the sheet of fan-hold paper from the print unit sheet currently being printed to the print start line of the next print unit sheet. After the paper is fed by one line in step S17, the value of the line counter (LC) 56 is increased by one, and in step S19, the value of the line counter (LC) 56 is increased by one.
The value of 54 is compared with the predetermined number of print lines (L Cmax) corresponding to the recording paper used, and the paper is fed until the value of LC becomes L Cwax.
The value of +++ax is set to the maximum number of lines that can be printed on one unit sheet of fan-hold paper to be used, excluding margins added at the top and bottom to avoid perforations. When the value of the line counter (LC) 54 reaches LCmax, in step 320, the fan-hold paper is page-fed to the printing start position for the next unit sheet. When page feeding is executed, the line counter (LC) 54 is reset to 0 in step 321, and in this way the perforation is skipped and the next printing state is started.

As mentioned above, when recording paper is set, the paper feed switch 42 performs the paper feed function, and if pressed intermittently,
Each press feeds the paper one line at a time, and if you press it continuously, it will continue to feed the paper by that amount.If you press it continuously, if you press it continuously, it will automatically move to the printing start position beyond the next perforation. It is possible to feed the recording paper automatically, and one paper feed switch is sufficient.

Furthermore, since the paper detector 38 is placed at a position corresponding to the sprocket hole of the fan-hold paper and counts the number of spout holes, the folding paper sewing machine can be used without using a paper feed means such as a bin feeder or a tractor. [Since the position of 1 is known, it is possible to compensate for the accumulation of paper feed errors caused only by frictional force.

Since this embodiment is configured as described above, the following effects can be obtained.

(1) Since the arm supporting the paper press roller can be released using the movement of the reciprocating carriage, a mechanism for releasing the paper press arm with a simple structure can be obtained without the need for extra parts. .

(2) By placing the paper detector between the pinch roller and the paper holding roller, the leading edge of the recording paper can be detected, increasing the reliability of paper setting, and eliminating the need for a mechanism for positioning the leading edge of the recording paper as in the past. becomes.

Of course, it is also possible to detect the end of the recording paper and the presence or absence of the recording paper.

(3) In addition, the paper feed switch can be used in three ways: feeding the paper set one line, and continuous feeding (searching the beginning of the page), which reduces the number of switches and makes the structure simpler and cheaper. Since it functions as a paper set key, operability is further improved.

(4) It is also possible to count the sprocket holes by placing the paper detector opposite the sprocket holes of the fan hold paper, and it is possible to use recording paper with sprocket holes even if the paper is fed only by frictional force. Become.

[Effects] As is clear from the above description, according to the present invention, one paper feed switch is used to operate the paper set switch and the paper set switch.
Since the configuration is such that it can function as a switch for single-line feed and continuous feed, a recording device with a simple structure, excellent operation, and low cost can be obtained.

[Brief explanation of the drawing]

Figures 1 to 4 are for explaining one embodiment of the present invention, Figure 1 is a perspective view, Figure 2 is a side view, and Figures 3 (A) to (C) are recording paper setting methods. 4 is a plan view of the operation panel, FIG. 5 is a side view illustrating the conventional structure, FIG. 6 is a block circuit diagram, and FIG. 7 is a flow chart. 21...Platen 22.34...Pulse motor 23...Paper press roller 24...Shaft 25.2B...Arm 27
．． 30... Guide shaft 28... Recording head 29... Carriage 29a
...Cam 31...Timing belt 35.
・Paper turn

Claims (2)

[Claims] (1) In a recording device configured to perform recording by moving a carriage equipped with a recording head in the direction of the print digit, and to set the leading edge of the recording paper at a predetermined position by feeding the recording paper a predetermined amount, 1. A recording apparatus characterized in that the paper feed switch is configured to function as a switch for setting the recording paper at a predetermined position when no recording paper is loaded. (2) The paper feed switch functions as a paper feed switch when recording paper is installed, and when this switch is operated intermittently, it advances the recording paper one line at a time for a certain period of time or a certain number of lines or more. 2. The recording apparatus according to claim 1, wherein the recording apparatus is configured to function as a switch for locating the beginning of a page of recording paper when operated.