JPS5938916B2 - printing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a printing device that cuts roll paper into ticket size pieces and prints on them using a thermal head.

2. Description of the Related Art In recent years, when issuing tickets such as commuter passes and tickets in railway operations, instead of printing using printing plates, printing using thermal heads, which can easily handle changes in printing patterns, has been used for printing tickets.

Since the above-mentioned thermal head is a printing method that changes the color of the ticket by heat generation, a platen roller for pressing the ticket is provided opposite to the heat generation line.

When the platen roller described above is directly exposed to the heat generated by the thermal head, it deteriorates significantly, and when it deteriorates, unevenness occurs in the pressure on the ticket, resulting in printing defects. SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a printing device that can detect as a ticket abnormality when the ticket is not positioned between the thermal head and the platen roller in order to prevent the platen roller from being directly heated by the thermal head.

According to the present invention, the first roller detects the complete position of the feeding roller that feeds out the roll paper for forming the ticket.
If the detector does not detect this position, it indicates that the roll paper for one ticket has not been fed out, and also indicates the cutting completion position of the cutter that cuts the roll paper into the length of one ticket. When the second detector does not detect that position, it indicates that the roll paper is not fed out due to obstruction by the cutter, and the third detector, which detects the cutting position side of the cut ticket, detects this. If the ticket is not waiting, it indicates that there is no ticket or at least it is not waiting in the fixed position. Therefore, these detectors can detect an abnormality in the ticket, and the thermal head can be activated based on this ticket abnormality detection. By prohibiting heating, the platen roller is not directly heated, and deterioration of the platen roller due to heating can be reliably prevented.

An embodiment of the present invention having such characteristics will be described in detail below with reference to the drawings.

The drawing shows the printing section of a ticket issuing machine used in railway operations. Tickets are issued by cutting the roll paper that makes up the ticket into ticket-sized pieces, printing information on one side of the cut ticket, and printing information on the other side. This is done by magnetic recording.

1 and 2 show roll paper 1 cut by cutter 2,
The part where information is printed by the thermal head 3 is shown.

The roll paper 1 described above reaches the cutter 2 through a passage 6 formed by upper and lower guide plates 4 and 5.

A feeding pressure roller 7 and a feeding roller 8 are provided oppositely above and below the above-mentioned passage 6. The above-mentioned feeding roller 8 is fixed to a shaft 11 installed between the fixed running wall 9 and the auxiliary wall 10, and a pulley 12 is fixed to the back side of the fixed wall 9 of this shaft 11. Power is transmitted from an output pulley 14 of a pulse motor 15 via a timing belt 13.

The above-mentioned feeding roller 8 is provided so as to feed out the roll paper 1 as long as one ticket by controlling its rotation by %.

Furthermore, a first cam 1 is provided on the surface side of the auxiliary wall 10 of the shaft 11.
6 is fixed, this first cam 16 has two detecting parts 17, 174 formed at 180 degree positions, and the first switch 18 is provided so that the detectors 17, 17 are set to 0FF. ing.

The above-mentioned first cam 16 is arranged so that the first switch 18 is set to 0FF every time the feed roller 8 feeds out the roll paper 1 by a length equivalent to one ticket. 1st when abnormally feeding out over or under the length.
The above-mentioned feeding pressure roller 7, which is positioned so that the switch 18 turns ON and outputs an abnormal signal, is supported by a support shaft 19, and a vertical shaft 20 is connected to the support shaft 19. It is supported by a holder 21 so as to be able to slide underground, and a spring 22 is interposed between the holder 21 and the support shaft 19.
Due to the pressure of this spring 22, the pressure roller 7 is fed out.
The feed roller 8 feeds out the roll paper 1.

The cutter 2 cuts the roll paper 1 as soon as the above-mentioned feed roller 8 feeds out the roll paper 1 with a length equal to one ticket. The movable cutter 25 is connected to one end of an operating rod 27 via a connecting rod 26.

The other end of the working rod 27 is pivotally connected to the fixed wall 9, and the working rod 27
A roller 28 is provided in the middle of the shaft 2.
9 and is in contact with the second cam 30 fixed to the operating rod 27
is urged upward by a spring 31. A one-turn clutch 32 is attached to the back side of the fixed wall 9 of the shaft 29, and power is transmitted to an input cup 33 of the clutch 32 from an output pulley 35 of a motor 34 via a belt 36.

Therefore, when the motor 34 is driven and the one-turn clutch 32 is controlled one rotation, the operating rod 27 moves up and down once by the operation of the second cam 30, and the movable cutter 25 moves in conjunction with this. Cut the paper 1 to form the ticket 37.

A third cam 38 is fixed to the surface side of the auxiliary wall 10 of the aforementioned shaft 29, a detection section 39 is formed on this cam, and the second switch 40 is provided so as to be turned off by this detection section 39. .

The third cam 38 is arranged so that the second switch 40 is turned OFF every time the cutter 2 completes cutting the roll paper 1, that is, when the cutter 2 finishes cutting the roll paper 1 incompletely. The position is set so that the second switch 40 turns ON and outputs an abnormal signal.

The thermal head 3 has a planar shape and is attached to the lower surface of the heat sink 41.

The heat sink 41 is fixed to the fixed wall 9 via a member 42. A platen roller 43 faces the heat generating line of the thermal head 3 described above, and the shaft 45 of the platen roller 43 is supported by a member 44, and is urged toward the thermal head 3 by a built-in spring 46. .

The heating line of the thermal head 3 (the contact position of the platen roller 43) and the cutting position of the cutter 2 described above are separated by the length of one ticket, and when the cutter 2 cuts the ticket 37,
The rear end of the ticket 37 is at the cutting position of the cutter 2, and its tip is sandwiched between the thermal head 3 and the platen roller 43.

A first feed roller 47 is located on the lower surface side of the thermal head 3 between the cutter 2 and the platen roller 43, and this feed roller 47 has a heat sink 41. A first pressing roller 48 is provided oppositely through the thermal head 3 .

The above-mentioned first feed roller 47 has a shaft 4 bearing on the fixed wall 9.
9, and a pulley 50 is fixed to the back side of the fixed wall 9 of this shaft 49.

The first pressing roller 48 described above is pivotally supported by one end of the rod 51,
The rod 51 is pivotally connected to the member 42 via a pin 52 at its intermediate portion, and is biased by a spring 53.

Note that 54 is a stopper. Furthermore, the platen roller 43
A second feed roller 55 is located at the rear stage of the feed on the opposite side of the first feed roller 47, and a second pressure roller 56 is provided oppositely to the upper surface of the feed roller 55. The aforementioned second feed roller 55 is provided slightly shorter than the length of one ticket from the aforementioned first feed roller 47, and is provided so that the ticket 37 can be delivered.

Further, the second feed roller 55 has a shaft 57 bearing on the fixed wall 9.
A pulley 5 is mounted on the back side of the fixed wall 9 of this shaft 57.
8 is fixed.

Power is transmitted to the above-mentioned pulley 58 and the above-mentioned pulley 50 of the first feed roller 47 from an output pulley 60 of the pulse motor 15 via a second timing belt 59.

These power transmissions are provided so that the feeding speed of the above-mentioned feeding roller 8 and the feeding speed of the first and second feeding rollers 47 and 55 are linked at a constant speed.

The aforementioned second pressing roller 56 is rotatably supported by a rotary shaft 61 that is supported by a fixed wall 9 and a fixed lever 62, and the second pressing roller 56 is normally attached to the second feeding roller 55 by a spring 63. Forced.

A third pressing roller 64 is pivotally supported at the rear end of the above-mentioned lever 62, and this roller 64 is attached to the lower transfer belt 6 which is displaced from the inner position of the upper and lower transfer belts 65 and 66 provided at the latter stage of transfer.
The third pressing roller 64 and the platen roller 43, which are located on the upper surface of the platen roller 6 and are normally provided with a gap so that no conveying force is applied, are provided with a gap slightly shorter than the length of one ticket. The contact points of the upper and lower transfer belts 65 and 66 are slightly longer than the length of one ticket than the platen roller 43 described above.

1 The aforementioned rotation shaft 61 is rotatably operated by an appropriate rotary solenoid (not shown), and is provided so that contact with the second pressing roller 56 can be switched to contact with the third pressing roller 64. .

A photoelectric detector 69 formed by a light emitter 67 and a light receiver 68 is provided for detecting the rear end of the ticket 37 cut with the cutter 2 in between.Printing configured as described above In the initial printing state of the device, the roll paper 1 is cut into the length of one ticket, the tip of which is at the cutter 2, and the tip of the cut ticket is placed in the thermal head 3 facing the platen roller 43. The rear end is located at the cutter 2 position.

When the pulse motor 15 is driven and controlled based on the printing command, the feeding roller 8 and the first and second feeding rollers 47 and 55
are driven at a constant transport speed. By driving the first and second feed rollers 47 and 55, the ticket 37 positioned on the thermal head 3 is transported for printing. .

The thermal head 3 prints information on the ticket 37, and when the printing is finished and the rear end of the ticket 37 leaves the platen roller 43, the pulse motor 15 stops and the first and second feed rollers 47, 55 The transfer of the ticket 37 is also stopped.

Note that the feed roller 8 is the first and second feed roller 4 described above.
Since the rolled paper 1 is fed out at a constant speed of 7 and 55, when the previous ticket 37 leaves the platen roller 43, the leading edge of the fed rolled paper 1 has reached the platen roller 43.

The cutter 2 then cuts this and waits for the next ticket 37 to be issued. On the other hand, the tip of the ticket 37 that has been printed has already passed the third pressure roller 64, and following the stop of the pulse motor 15 mentioned above, the rotary solenoid (not shown) is operated, and the lever 62 is switched to the second pressure roller 64. The pressure roller 56 moves upward and separates from the second feed roller 55, and the third pressure roller 6
4 moves downward and comes into contact with the lower transfer belt 66. The above-mentioned upper and lower transport belts 65, 66 are driven in the transport direction and are on standby when a printing command is issued, and transport the ticket 37 by the downward movement of the third pressing roller 64 mentioned above.

After that, the ticket 37 is transferred to the magnetic recording section, information is magnetically recorded on the magnetic part, and the ticket is issued. Figure 3 shows a control circuit for detecting an abnormality in the ticket. , the photoelectric detectors 69 are respectively connected to corresponding AND gates A1 to A3, and these AND gates A1 to A3 are connected to an OR gate 0R,
A timer circuit 70 is connected to each AND gate A1 to A3.

The above-mentioned timer circuit 70 has a time set from when the printing command is output until the printing of the ticket 37 is completed, and when this time elapses, it produces an output, and each of the AND gates A1 to A
Control the opening of gate 3. As explained above with respect to the ticket 37 in FIGS. 1 and 2, when the ticket 37 is normally fed out, cut, and printed, the first switch 18 and the second
The switch 40 and the photoelectric detector 69 become OFF-+0N-+0FF within the set printing end time, and since no output is generated from the timer circuit 70 during 0N, each AND gate A1 to A3 closes and the signal is No output. but,
When the above-mentioned timer circuit 70 measures the time from the print command to the end of printing, an output is generated, so each switch 18,
40 and the photoelectric detector 69 are in the following state in which they do not detect the set conditions, an abnormality detection signal is output.

For example, if the first switch 18 continues to output even after the printing end time, this indicates that the length of one ticket has not been fed out, so the AND gate A1 generates an output and the OR gate 0R detects an abnormality. A signal is output.

In this case, the amount of feed of the roll paper 1 may be longer or shorter than the length of one ticket, but if it is shorter, it means that the tip of the cut ticket 37 has not reached the platen roller 43, so the length of the paper roll 1 may be longer or shorter than the length of one ticket. If the thermal head 3 is driven in this state, the platen roller 43 will be directly heated.

Furthermore, if the second switch 40 continues to output even after the printing end time, this indicates that the cutter 2 has not completed the cutting operation, so the AND gate A2 generates an output.
An abnormality detection signal is output from the OR gate 0R.

In this case, the next time the roll paper 1 is fed out, it may get caught in the cutter 2 or may jam, and if jamming occurs, the ticket 37 will not be fed to the thermal head 3.

Furthermore, if the photoelectric detector 69 continues to output even after the printing end time, this indicates that the trailing edge of the ticket 37 has not been detected, so an output is generated from the AND gate A3.
An abnormality detection signal is output from the OR gate 0R.

In this case, the ticket 37 is not supplied to the thermal head 3.

If driving of the thermal head 3 is prohibited based on the abnormality detection signal from the OR gate 0R, direct heating of the platen roller 43 can be prevented.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which Fig. 1 is a front view of the printing section of the ticket issuing machine, Fig. 2 is a cross-sectional side view of the feeding part,
FIG. 3 is a control circuit block diagram for abnormality detection. 1...Roll paper, 2...Katsuta, 3.
...Thermal head, 8... Feeding roller, 18... First switch, 40...
Second switch, 69...Photoelectric detector.

Claims (1)

[Claims] 1. A feed roller that feeds out a roll of paper the length of one ticket, a cutter that cuts the fed roll paper into the size of a ticket,
A printing device that has a thermal head that prints information on the cut ticket, opens a length of one ticket between the heating line of the thermal head and the cutter, and waits the cut ticket at the cutting position. a first detector for detecting a position at which the feed roller has completed feeding out one ticket; a second detector for detecting a position at which the cutter has completed cutting; and a second detector for detecting the cutting position side of the note. 3, a timer circuit that measures the completion of printing set after a print command is output, and a ticket abnormality is determined when each of the above-mentioned detectors does not detect the set conditions after the timer circuit has timed the time. and a determination circuit that outputs a ticket abnormality signal.