JPS6315917B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION TECHNICAL FIELD The present invention relates to a printing device in which a carriage having a printing head reciprocates along the platen to print on printing paper on the platen.

Purpose of the Invention An object of the present invention is to enable the printed side of the printing paper to be easily and automatically separated from the unprinted side after printing is completed, and to separate the front end of the unprinted side after separation. It can be set smoothly into the printing position without getting caught on components around the printing part, and after separation, the printed side is automatically ejected and the unprinted side is sent to the printing position automatically. An object of the present invention is to provide a paper feeding device that can perform the following operations.

Embodiment Hereinafter, an embodiment embodying the present invention will be described based on the drawings. A platen 2 is arranged and fixed on the frame 1 of the printer, and a printing surface 2 is placed in front of it.
a is formed. A carriage 3 is arranged in front of the printing surface 2a, and a printing head 4 having a built-in printing wire (not shown) is placed and fixed on its upper surface. During the printing operation, the carriage 3 reciprocates within the printable area A along the printing lines on the printing surface 2a as shown by two-dot chain lines on both the left and right sides of FIG. Dot matrix printing is performed on the printing paper 5 on the printing surface 2a by the printing wire of the printing head 4.

Further, when printing is stopped, it is moved to a home position on the left side outside the printable area A shown by the solid line in FIG.

A solenoid 6 as a biasing means is fixed on the platen 2 side of the carriage 3, and a cutting blade 7 as a paper cutting member is provided on its armature. The cutting blade 7 is located outside, not facing the printing paper 5, when the carriage 3 is located at the home position and at the right end of the movement range. As shown in FIG. 1, when the solenoid 6 is demagnetized, the armature is retracted and the cutting blade 7 is separated from the printing paper 5. or,
As shown in FIG. 4, when the solenoid 6 is energized, the armature protrudes and the cutting blade 7 moves toward the printing surface 2.
In this state, the carriage 3 moves to the right to cut the printing paper 5 at the upper surface position of the platen 2, and cut the printing paper 5 vertically. A cutting blade guide 8 is fixed to the upper surface of the platen 2 to guide the horizontal movement of the protruding cutting blade 7 and to catch the printing paper 5 so that it does not escape backwards during cutting.

As shown in FIG. 1, a permanent magnet 9 is provided on the front left side of the carriage 3. Further, an operating roller 10 is rotatably supported on the rear left side of the carriage 3.

A reed switch 11 is arranged on the left side of the frame 1, and when the carriage 3 is located at the home position, the permanent magnet 9 faces this reed switch 11, and a detection signal is output by its magnetic force. Ru. This permanent magnet 9 and reed switch 11 constitute a detection device. The detection signal is input to a control circuit 12 as a control means shown in FIG. (hereinafter simply referred to as the operation key) 26), the solenoid 6 is energized and the carriage 3 is controlled to move from the home position to the right, and when the operation key 26 is operated, the above-mentioned detection is performed. If no signal is input, the carriage 3 is automatically returned to the home position, and then the paper cutting operation is started. Therefore, cutting of the printing paper 5 starts from the left end.

As shown in FIG. 2, a pair of left and right pin tractors 13 as paper feeding devices are arranged below the platen 2, and the pin tractors 13 are inserted into small holes (not shown) on both sides of the printing paper 5. When engaged, the printing paper 5 is delivered into the printable area A on the printing surface 2a. A paper guide plate 1 is provided between the platen 2 and the pin tractor 13.
4 and 15 are provided. Above the platen 2 is a pair of pull-out rollers 1 as a paper take-out device.
6 and 17 are arranged, and those rollers 1
By the cooperation of 6 and 17, the printing paper 5 can be drawn upward. The pin tractor 13 and both pull-out rollers 16 and 17 are rotated by a predetermined amount each time the print head 4 finishes printing one print line, and feed the printing paper 5 by one print line. It's becoming like that. Further, the drawing speed of both drawing rollers 16 and 17 is set to be slightly faster than the feeding speed of the pin tractor 13, thereby tensioning the printing paper 5 and causing the drawing rollers 16 and 17 to be connected to the printing paper 5. A slip occurs in between.

An actuating plate 18 is arranged on the left side of the frame 1, and the actuating plate 18 is supported by a pair of guide pins 20 fixed to the upper surface of the platen 2 in a guide hole 19 formed therethrough so as to be movable back and forth. There is. The operating roller 10 is attached to the front edge of the operating plate 18.
An oblique cam surface 18a is formed opposite to the cam surface 18a, and when the carriage 3 moves to the home position, the actuating roller 10 moves to the cam surface 18a.
8a, and its cam action causes the actuating plate 18 to
is now being moved backwards.

Behind the actuation plate 18, a pair of left and right support levers 22, 23 are supported by a pair of support shafts 21 on both left and right sides of the frame 1 so as to be integrally rotatable.
As shown in FIGS. 2 and 3, an abutment portion 22a is formed at the rear end of one of the support levers 22 and faces a bent portion 18b formed at the rear end of the actuation plate 18. As shown in FIGS. A guide plate 24 is fixed between the tips of both support levers 22 and 23. The guide member 25 is
is configured.

The guide member 25 is normally placed in its original position in the inclined state shown in FIG. It has been moved and placed. In this state, the guide plate 24 is located below the platen 2, outside the feeding range of the printing paper 5 and outside the movement range of the carriage 3, so as not to obstruct the horizontal movement of the carriage 3. or,
As shown in FIG. 3, when the actuating plate 18 is moved rearward, the bent portion 18b and the contact portion 2
The guide member 25 is rotated clockwise from the state shown in FIG. 2 through the engagement portion with the printing surface 2a, and the guide plate 24 is placed in an operating position extending from in front of the printing surface 2a to below it. For this purpose, the printing paper 5 fed from the pin tractor 13 is passed along the guide plate 24 through the printing position between the printing surface 2a and the printing head 4, and then passed between the drawing rollers 16 and 17. I can guide you.

In this way, the actuating roller 10 and the actuating plate 18 constitute an actuating means for moving the guide member 25 from the original position to the actuating position based on the movement of the carriage 3 to the home position.

As shown in FIGS. 2 and 3, a limit switch 27 is disposed near one of the support levers 22, and the actuation plate 18 is moved to the rear position, and the guide member 25 is placed in the actuation position. When,
It is designed to be turned on via the support lever 22, and its signal is input to the control circuit 12. After the paper cutting operation described above has been executed, the carriage 3 is returned to the home position again.
Both the detection signal from the reed switch 11 and the signal from this limit switch 27 are sent to the control circuit 1.
2, the pull-out rollers 16, 17 and the pin tractor 13 are continuously rotated for a certain period of time based on the output signal from the control circuit 12, and as a result, both the pull-out rollers 16, 17 move the cut paper 5. While ejecting the printed part to the top and outward,
A pin tractor 13 sends the unprinted side portion through the printing position and between pull-out rollers 16 and 17. This limit switch 27, the detection device, the control circuit 12, and the actuation means constitute a control device.

Next, the operation of the printing device configured as described above will be explained. Now, when the printing operation is completed, the printing paper 5 is given a paper feed of one printing line, the last printing line is moved above the platen 2, and the carriage 3 is moved to the left home position. Ru.

When the carriage 3 is moved to the home position, the actuating roller 10 is moved to the cam surface 1 of the actuating plate 18.
8a and its actuating plate 18 is moved rearward. For this purpose, the guide member 25 is placed in the operating position shown in FIG. Further, the permanent magnet 9 faces the reed switch 11, and the first detection signal after printing is completed is output.

When the operation key 26 is operated in this state, the solenoid 6 is energized and the cutting blade 7 projects toward the platen 2, and then the carriage 3 moves from the home position to the right. Therefore, the printing paper 5 is cut from the side of the upper surface of the platen 2 below the final printing line, and the printed side portion and the unprinted side portion are separated.

In this way, when the carriage 3 moves to the right end position and the cutting blade 7 is positioned to the right from the position of the printing paper 5, the solenoid 6 is demagnetized and the cutting blade 7 is retracted to a position where it does not come into contact with the printing paper 5. At the same time, the carriage 3 returns to the left in this state.

Then, when the carriage 3 is located at the home position again, the guide member 25 is placed in the operating position and the limit switch 27 is turned on in the same manner as described above, and the second detection signal after printing is completed is output. Based on this second detection signal and the signal from the limit switch 27, the pull-out rollers 16, 17 and the pin tractor 13 are rotated. Therefore, the printed side portion of the separated printing paper 5 is ejected upwardly and outwardly by the pull-out rollers 16 and 17, and the front end of the unprinted side portion is not caught on components around the platen 2. The front end surface of the non-printed portion is guided by the guide plate 24 along the printed surface 2a and sent upward by the pin tractor 13.
It is held between 17. In this state, pull out roller 1
6, 17 and pin tractor 13 are stopped.

Note that after the above-mentioned separation and cutting, the front end of the non-printed portion may fall forward away from the printing surface 2a, but this is because the guide member 2 in its original position
5, and then the carriage 3, 2
As the guide member 25 moves to the operating position along with the second movement to the home position, the fallen portion is erected along the printing surface 2a. Furthermore, since the drawing speed of the drawing rollers 16 and 17 is faster than the feeding speed of the pin tractor 13, the front end of the non-printed side portion does not reach between the drawing rollers 16 and 17 before the printed side portion is discharged. , the printed side and the unprinted side do not overlap.

In this way, after printing is completed, press the operation key 26.
When operated, the printing paper 5 is automatically separated into a printed side portion and an unprinted side portion, the printed side portion is ejected, and the unprinted side portion is moved by the guide member 25 onto the printing surface 2a. It is set in a position where it can be printed while being smoothly guided along the paper.

When setting a new printing paper 5, the guide member 25 placed in the operating position as the carriage 3 moves to the home position moves the front end of the printing paper upward along the printing surface 2a. The front edge of the printing paper will not get caught on components around the printing position.

Furthermore, the present invention is not limited to the above embodiments, but may be embodied in the following embodiments.

(b) If perforations for cutting and cutting are formed at equal intervals on the printing paper, the paper cutting member provided on the carriage may be a roller that rolls while pressing the perforations or a roller that rolls while pressing the perforations. Use sliding contact members that move in sliding contact.

(b) Use a laser device that burns out printed paper with a laser beam as a paper cutting member.

(c) Use optical detection means, such as a combination of a phototransistor and a light emitting diode, as a detection device between the carriage and the frame.

(d) Similarly, as a detection device, use a mechanical detection means such as a limit switch that is provided on one side of the carriage or frame and is in operative contact with the other.

(E) As a means for moving the guide member 25 between the original position and the operating position, as shown in FIG. 6, it is operated by a signal input from a control circuit based on a detection signal from a detection device. Use a solenoid or motor with

(f) The home positions of the carriage 3 are provided on both sides of the printable movement area A, and the detection devices are provided at both home positions. In this way, there is no need to move the carriage back to the home position on the other side after printing is completed. In other words, the paper cutting member is energized based on the detection signal when the carriage 3 that has finished printing is located at either the left or right home position, and the carriage is subsequently moved to the other home position, either the left or right. The paper feeding device and the paper ejecting device may be operated based on a detection signal when the printing paper is cut by the printer and the carriage is positioned at the other home position.

Further, as an embodiment similar to the present invention, it is conceivable that the paper cutting member is manually switched between a cutting position and a position where it is withdrawn from the cutting position. In this case, provide a cover that covers the entire printing area.
A hole is provided on one side of the cover so that the paper cutting member can be operated only when the carriage is in the home position, and the paper cutting member cannot be operated when the carriage is in the intermediate position. desirable.

Effects of the Invention As detailed above, the present invention includes a biasing means for biasing the paper cutting member, a setting operation key for starting the paper cutting operation, and a setting operation key for starting the paper cutting operation when the carriage moves out of the printable area. a detection device that detects and outputs a detection signal, a paper feeding device that feeds the unprinted side of the printing paper to the printing position, and a paper takeout device that pulls out the printed side of the printing paper from the printing position. and a guide member movable between an original position that does not interfere with the reciprocating movement of the carriage and an operating position for guiding the front end of the printing paper sent out from the paper delivery device to the paper take-out device; actuating means for moving the guide member from the original position to the operating position when the carriage moves out of the printable area; and biasing means when the setting operation key is operated and a signal is output from the detection device. energizes the paper cutting member, and
Moving the carriage along the platen to perform the cutting operation, then moving the carriage out of the printable area, moving the guide member to the operating position by the actuating means, and actuating the paper take-out device and the feeding device; By including a control circuit that pulls out the printed side part from the printing position and places the unprinted side part in the stamp position, when the setting operation key is operated and a signal is output from the detection device, Based on this, the printed side can always be easily, automatically, and reliably separated from the edge of the unprinted printing paper. Then, the unprinted side part after separation can be smoothly set in the paper position without getting caught on components around the printing part, and moreover, the printed side part can be ejected after separation and the unprinted side part can be easily set. The printing side portion can be automatically sent to the printing position, and the next printing operation can be immediately started, which has an excellent effect that printing work can be carried out efficiently.

[Brief explanation of the drawing]

Figures 1 to 5 show an embodiment embodying the present invention, in which Figure 1 is a partially cutaway plan view of the printing device, and Figure 2 shows the guide member placed in its original position. FIG. 3 is a partial side sectional view of the guide member in the operating position; FIG. 4 is a partial side sectional view of the paper cutting member;
FIG. 5 is a block diagram showing the electrical configuration of the embodiment device, and FIG. 6 is a block diagram showing another embodiment. Platen...2, Carriage...3, Printing head...4, Printing paper...5, Cutting blade...7, Permanent magnet...9, Operating roller...10, Reed switch...11, Control circuit... 12. Pin tractor...
13. Pull-out roller... 16, 17. Operating plate...
18, Guide member...25, Limit switch...
27.

Claims (1)

[Claims] 1. A print head 4 is mounted on a carriage 3 that is reciprocated along a platen 2 on which a print paper 5 is mounted.
and a paper cutting member 7, etc. are provided, and the paper cutting member 7, etc. is biased as necessary to automatically cut the printing paper 5 as the carriage 3 moves along the platen 2. In the printing device, there are provided a biasing means 6 for biasing the paper cutting member 7, etc., a setting operation key 26 for starting the paper cutting operation, and a device for detecting that the carriage 3 has moved out of the printable area A. Detection devices 9 and 1 that detect and output detection signals
1, a paper feeding device 13 for feeding the unprinted side of the printing paper 5 to the printing position, paper take-out devices 16 and 17 for pulling out the printed side of the printing paper 5 from the printing position, and a carriage. a guide member provided movably between an original position that does not obstruct the reciprocating movement of the printing paper 3 and an operating position for guiding the front end of the printing paper 5 sent out from the paper delivery device to the paper take-out devices 16 and 17; 25, and an actuating means 18 for moving the guide member 25 from the original position to the operating position when the carriage 3 moves outside the printable area A, and when the setting operation key 26 is operated, the detection device 9 , 11, etc., the paper cutting member 7, etc. is urged by the urging means 6, etc., and the carriage 3 is moved along the platen to perform the cutting operation, and then the carriage 3 is moved to the printable area. A, move the guide member 25 to the operating position by the actuating means 18, etc., and actuate the paper taking out devices 16, 17 and the feeding device 13,
A control circuit 1 that pulls out the printed side portion from the printing position and places the unprinted side portion at the stamp position.
2. A paper feeding device for a printing device, comprising: