JPS621836B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a printing device that prints on printing paper such as regular paper such as slips and bankbooks, or long paper, and in particular, the invention relates to a printing device that prints on printing paper such as regular paper such as slips and passbooks, or long paper. This invention relates to a printing device that can be easily inserted.

For example, when inserting a standard size paper such as a slip or a bankbook between the print head and the platen, it is necessary to keep a wide gap between the two. Further, if a paper guide is interposed between the printing head and the platen, the printing paper to be printed can be inserted along the paper guide, making it easier to insert the paper. However, printing cannot be performed with the paper guide inserted between the print head and platen, so after inserting the paper, the paper guide is removed from between the print head and platen. There must be.

An object of the present invention is to provide a printing device that can satisfy these requirements with a simple configuration.

The following will explain the embodiments shown in the drawings. FIG. 1 is a cross-sectional view of the printing device as seen from the side, and numeral 1 in the figure indicates a pair of fixed frames (only one of which is shown) placed on both sides of the device. A guide shaft 3 is fixed to a V-shaped groove 2 formed on the upper edge of the fixed frame 1, and a motor 6 for driving a print head 5 is attached to a carrier 4 that reciprocates along this guide shaft 3. There is. The printing head 5 has a large number of arms 5a extending radially from a boss fixed to the motor shaft, and a type 5b is attached to the end of each arm 5a. A printing hammer 8 for striking the type 5b in the direction of the platen 7 is attached. The platen 7 is rotatably supported by a platen support 9 attached to the fixed frame 1. That is,
A recess 10 is provided at the upper edge of the platen support 9, and the platen shaft 7a is fitted into the recess 10 from above to assemble the platen 7 into the support 9. The platen support 9 is attached to the fixed frame 1 as follows. In other words, the guide pin 1 is attached to the fixed frame 1.
1 and 11 are provided protrudingly, and each guide pin 1 is provided on the support body 9.
1 is inserted into the support body 9.
is attached to the fixed frame 1 so that it can move forward and backward in the left and right directions in the figure. As the support body 9 moves back and forth, the gap between the platen 7 and the print head 5 facing thereto changes. Further, a movable body 13 is attached to the platen support 9 so as to be movable back and forth in the same direction as the movement direction of the support 9 (horizontal direction in the figure). That is,
The platen support 9 is provided with guide pins 14, 14 protruding, and the movable body 13 is provided with elongated holes 15, 15 into which the guide pins 14 are inserted, so that the movable body 13 can move forward and backward with respect to the platen support 9. It is becoming. A pair of U-shaped recesses 16 and 17 are formed at the upper edge of the movable body 13 and open upward. A first eccentric cam 18 is fitted into one of the recesses 16, and a second eccentric cam 19 is fitted into the other recess 17. Each of the eccentric cams 18, 19 has a disk shape, and a cam shaft 18a, 19a is fixed at each eccentric position. It is in contact with the left and right inner surfaces of. and one camshaft 1
The camshaft 8a is rotatably supported by a V-shaped groove 20 formed on the upper edge of the fixed frame 1, and the other camshaft 19a is rotatably supported by the platen support 9. Therefore, one camshaft 1
When 8a is rotated, the outer circumference of the eccentric cam 18 is moved into the recess 1.
6, the movable body 13 moves forward and backward in the left and right directions in the drawing. The maximum amount of movement of the movable body 13 at this time corresponds to twice the amount of eccentricity A of the eccentric cam 18. When the eccentric cam 18 rotates, the movable body 13 and the platen support 9 move integrally with respect to the fixed frame 1, so by rotating the eccentric cam 18, the gap between the print head 5 and the platen 7 is reduced. Can be adjusted, and its maximum adjustment amount is 2A
It is. Furthermore, when the other camshaft 19a is rotated, the outer periphery of the eccentric cam 19 comes into sliding contact with the inner surface of the recess 17, and the movable body 13 attempts to move relative to the platen support 9; 18
Since it will not move unless a is rotated, the platen support 9 will eventually move forward and backward relative to the fixed frame 1. The maximum amount of movement of the platen support 9 at this time corresponds to twice the amount of eccentricity B of the eccentric cam 19. In other words, the cam mechanism constituted by the recess 17 and the eccentric cam 19 serves as a fine adjustment means for moving the platen support 9 relative to the movable body 13. By rotating the eccentric cam 19, the gap between the print head 5 and the platen 7 can be adjusted, and the maximum amount of adjustment is 2B. Therefore, if the eccentricity B of the other eccentric cam 19 is set to be sufficiently smaller than the eccentricity A of one eccentric cam 18, the printing head 5 and platen 7 can be moved by rotating the operating lever 19b. The interval between them can be finely adjusted as appropriate.

An inserter 22 for inserting a standard size paper 21 such as a slip or passbook between the print head 5 and the platen 7 is arranged above the platen 7. This inserter 22 is inserted into the regular paper 21 from above.
It has a guide part 22a into which the paper is inserted, and a pair of paper feed rollers 22b which sandwich the standard paper 21 at a position below the guide part and feed the paper by a fixed amount. (It may be a part of the fixed frame 1).

A paper fixing guide 23 for long paper is further attached to the platen support 9. This guide 2
3 is for guiding the printing paper along the outer periphery of the platen 7 when printing on a long printing paper (not shown), and is arranged below and close to the platen 7. ing. Also, 24 in the figure
is a rotating member having one end pivotally connected to the platen support 9, and the center portion of a V-shaped roller support 25 is pivotally attached to the rotating end of the rotating member 24. The roller support body 25 rotatably supports paper feed rollers 26 and 27 at both ends, and both rollers 26 and 27 are elastically pressed against the platen 7 through the paper guide 23. Note that this pressing force is provided by a spring 28 stretched between the rotating member 24 and the platen support 9. In the figure, reference numeral 29 denotes an operating lever as a paper insertion preparation means for rotating the rotating member 24 against the spring 28.
is pivotally supported by the platen support 9, and acts to push down the rotating member 24 at one end near the pivot. Then, the rotating member 24 is moved to the operating lever 29.
When pushed down by the rotation of the two paper feed rollers 2
6 and 27 are separated from the platen 7, and a long sheet of paper can be easily inserted between the paper guide 23 and the platen 7.

The fixed frame 1 is further provided with a movable paper guide 30 as shown in FIG. This paper guide 30 is pivotally connected to one end of a support member 32 that rotates around a fixed shaft 31 with a pin 33. One end of an engaging member 35 pivotally mounted is engaged. Note that this engagement member 35
is always biased counterclockwise by a spring 36 stretched between it and the support member 32, and is held in the position shown in FIG. 2 by a stopper 37. A long hole 38 is provided at the other end of the support member 32 . Further, an engagement pin 39 is provided protruding from the end of the rotating member 24, and the movable paper guide 30
is interposed between the print head 5 and the platen 7, the engagement pin 39 is located near the other end of the engagement member 35, and when the rotation member 24 rotates counterclockwise, the engagement pin 39 is The dowel pin 39 pushes the engaging member 35 clockwise against the spring 36.

Further, in FIG. 2, reference numeral 40 denotes a cam interlocking plate having a substantially V-shape, and the central corner of this interlocking plate 40 is rotatably connected to the fixed frame 1 with a pin 41. Cam rollers 42 are mounted on both ends of the interlocking plate 40, and each cam roller 42 contacts the eccentric cam 18 from the left and right sides in the figure. Further, a tongue piece 40 protruding laterally of the interlocking plate 40
A drive pin 43 that is inserted into the elongated hole 38 of the support member 32 is provided at a.

With the above configuration, when it is desired to print on standard paper 21 such as a slip or passbook, the inserter 22 is mounted above the platen 7, and the cam shaft 18a is rotated approximately (for example, counterclockwise). Turn half a turn, move the movable body 13 and the platen support 9 together to the right to widen the gap between the print head and the platen 7, and in this state insert the regular paper 21 into the guide section 22a of the inserter 22. Just insert it. Then, due to the half rotation of the eccentric cam 18, the cam interlocking plate 40 rotates from the imaginary line position to the solid line position in FIG. Print head 5 from position
and platen 7. The standard paper 21 in the inserter 22 is fed by a pair of paper feed rollers 2.
2b and sent downward. When the regular paper 21 is guided by the movable paper guide 30 and interposed between the print head 5 and the platen 7 in this manner, the camshaft 18a is rotated approximately half a turn in a fixed direction again. As a result, the platen 7 approaches the print head 5, and the movable paper guide 30 separates from between the print head 5 and the platen 7 and descends to the position shown by the imaginary line in FIG. 2, thereby starting the printing operation. can do.

In the above-described insertion operation of the standard paper 21, the print head 5 is inserted by half a rotation of the camshaft 18a.
Since the space between the printing head 5 and the platen 7 is widened by a maximum of 2A, and the movable paper guide 30 is interposed between the printing head 5 and the platen 7, paper can be inserted through the inserter 22 very easily.

In addition, if the standard size paper 21 is thick, if you want to print on multiple sheets of paper 21 one on top of the other, or if you want to adjust the printing pressure, rotate the control lever 19b to move the paper between the print head 5 and platen 7. By finely adjusting the gap, the desired purpose can be achieved.

Next, if you want to print on a long paper such as a rolled receipt paper, for example, there is no need to install the inserter 22, and the camshaft 18a is rotated to print between the platen 7 and the print head 5. The movable paper guide 30 may be interposed between the two by widening them, and the paper feed rollers 26 and 27 may be separated from the platen 7 by rotating the operating lever 29 counterclockwise. When the operating lever 29 is rotated counterclockwise, the rotating member 24 rotates and both paper feed rollers 26 and 27 are separated from the platen 7, but at the same time, the engaging pin 39 of the rotating member 24 is moved to the engaging member 35. is pushed around against the spring 36, and the movable paper guide 30 is rotated via this engaging member 35 as shown in FIG. As a result, the movable paper guide 30 is inclined along the platen 7, and the lower end (discharge side end) of the movable paper guide 30 is connected to one end of the fixed paper guide 23, so that both guides 30 and 23 are connected. If you insert a long piece of paper from the upper end of the movable paper guide 30, the paper will be inserted into the movable paper guide 30.
The fixed paper guide 23 is guided through the paper guide 23. Therefore, the camshaft 18a is rotated half a turn in a certain direction to bring the platen 7 closer to the print head 5, and the movable paper guide 30 is removed from between the print head 5 and the platen 7, and then the operating lever 29 is moved counterclockwise. When returned, both paper feed rollers 26 and 27
comes into contact with the platen 7 again through the paper. Therefore, by rotating the platen 7, paper can be fed, and by operating the print head 5 and print hammer 8, a predetermined printing operation can be performed. In addition,
In this case as well, the gap between the print head 5 and the platen 7 can be finely adjusted by rotating the operating lever 19b, and adjustments can be made according to the printing pressure, paper thickness, number of sheets, etc. I can do it.

Further, when inserting the printing paper from the rear of the platen 7, the printing paper can be easily inserted by simply rotating the operating lever 29 counterclockwise to disengage the paper feed rollers 26, 27 from the platen 7.

As described above, the printing device of the present invention has the platen 7
When the paper moves away from the print head 5, a movable paper guide 30 is inserted between the print head 5 and the platen 7.
is inserted, and the lower end of the movable paper guide 30 is close to one end of the fixed paper guide 23 disposed close to the bottom of the platen 7, and both paper guides 30 and 23 are connected, so the structure is simple. Printed paper can be easily inserted.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view showing one embodiment of the present invention, and FIG.
3 and 3 are side views illustrating the operation of the movable paper guide portion in the same embodiment. 1...Fixed frame, 5...Print head, 7...
... platen, 9 ... platen support, 16 ... U-shaped recess, 18 ... eccentric cam, 30 ... movable paper guide.

Claims (1)

[Claims] 1 a print head, a platen support provided to be movable forward and backward with respect to the print head, a platen rotatably supported by the platen support opposite to the print head, and a platen adjacent to the bottom of the platen. A fixed paper guide arranged, a paper feed roller that feeds the printing paper inserted between the fixed paper guide and the platen by pressing it against the outer peripheral surface of the platen, and a paper feed roller having one end disposed behind the platen. a support member that is rotatably supported on a fixed shaft and rotates in conjunction with the forward and backward movement of the platen support;
The center portion of the support member is rotatably supported at the other end of the support member, and when the platen support moves in a direction away from the print head, the support member moves from a lower position of the platen due to the rotational movement of the support member, and the print is printed. a movable paper guide interposed between the head and the platen;
Only when the platen support moves away from the print head, the movable paper guide is moved so that its lower end is close to one end of the fixed paper guide on the print head side in conjunction with the separation operation of the paper feed roller from the platen. 1. A printing device comprising: paper insertion preparation means for rotating both paper guides so that they are connected.