JPH0214199B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a printing device that prints by pressing and rolling a printing roller onto the printing surface of a printing wheel.

In conventional printing devices that print by lowering and rotating the type wheel towards the inserted printing paper, the type ring is lowered (dropped) and rotated towards the printing paper using a magnet or motor, and then the type ring is rotated downward (falling) towards the printing paper and then the type is placed on the printing stand. Alternatively, by using a magnet, a printing hammer is struck toward the type wheel for stamping, or by rotating the platen toward the type wheel for pressure printing. However, in the case of the type wheel rotation method and printing hammer striking method using magnets, it is necessary to make the magnet larger and stronger due to the unique configuration of printing machines in which the space between the type wheel and printing paper is wide. However, both methods have problems such as high impact noise during printing, wear of type due to impact, and failure of various parts of the device. There is enough between
There was a problem where the printing paper could not be inserted smoothly due to lack of time.

Therefore, the applicant and others have developed a new printing method.
First, a type wheel is lowered and rotated toward the inserted printing paper, and then a printing roller is pressed and rolled against the lowered and rotated type wheel with the printing paper interposed in between, thereby printing. This pressurized printing device was developed, but while it produces less impact during printing, produces less printing noise, and has good print clarity, it also has a unique operation that operates the type wheel and printing roller. In addition to requiring a mechanism, the resistance when pressurizing the printing roller is large and a large driving force is required to move the printing roller, so the overall structure of the operating mechanism becomes large and complicated, and the number of parts increases. , manufacturing and assembly become complicated and manufacturing costs increase.
Various problems arose, including the difficulty in synchronizing the downward rotation of the type wheel and the pressing and rolling operation of the printing roller.

The present invention was developed in view of the above-mentioned problems, and its purpose is to efficiently operate the downward rotation of the type wheel and the pressing and rolling motion of the printing roller by a single drive mechanism. This makes it possible to simplify the overall configuration, increase operational reliability, and reduce manufacturing costs.The printing device also allows easy adjustment of the operating timing of the type wheel and printing roller, making it easy to use. In order to achieve the above-mentioned object, the present invention provides a motor which rotates the descending rotation of the type wheel and the pressing and rolling motion of the printing roller by a motor that is driven when printing paper is inserted. It is configured to be connected to two rotating disks.

DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of a printing device according to the present invention will be described in detail below with reference to the accompanying drawings.

The drawing shows a time stamp which is an embodiment of the printing device according to the present invention, and in the drawing, 1
2 is a lower case, 2 is an upper case attached to the lower case 1 with its mouth open, 3 and 3 are seat plates provided on the left and right sides of the lower case 1, and 4 is a bottom plate of the lower case 1. At the rear end portions of the left and right seat plates 3, 3, supporting plates 3a, 3a which protrude upward into the upper case 2 in an inverted L-shape are connected.
An intermediate portion of a type support arm 6 is rotatably attached to a support shaft 5 that is horizontally suspended between 3a. 7 is a type shaft horizontally suspended between the ends of the type support arm 6;
A plurality of various types of type wheels 8 having, for example, number type characters, symbol type characters, etc. formed on the circumferential surface are attached to the type shaft 7 so as to be able to move freely, and a type support arm 6 containing each of these type wheels 8... The entire body is always kept at the raised position shown in FIG. 1 by the pulling force of the traction spring 9.

Reference numeral 10 denotes a substantially U-shaped interlocking arm rotatably connected to the rear end of the type support arm 6 via a shaft 11. At the lower end of this interlocking arm 10, guide rollers 12a, 12a are provided at both left and right ends. The attached roller shaft 12 is horizontally installed so as to be rotatable. Also, 1
Reference numeral 3 denotes a guide plate attached to the upper surface of the rear end of the bottom plate 4, and this guide plate 13 has the bottom tips 13b of the upright plates 13a, 13a connected to the left and right abutting the top surface of the bottom plate 4, and It is supported by screwing the upper end of the print spacing adjustment screw 16 rotatably inserted into the bottom plate 4 into the screw hole of the bracket 13c protruding from the left and right sides, respectively, and is further connected to the rear end of the guide plate 13. In the provided box 17, the upper end is in contact with the ceiling surface of the box 17, and the lower end is in contact with the adjustment plate 18a.
A compression spring 19 is interposed, which abuts on. Reference numeral 18 denotes a printing pressure adjustment screw attached to the rear end portion 4a of the bottom plate 4 so as to be able to freely screw up and down, and a nut 18b attached to this screw 18 supports the adjustment plate 18a.

As described above, the upright plates 13a, 13a of the guide plate 13 attached to the bottom plate 4 are cut out with oblique elongated holes 14, 14 into which the left and right guide rollers 12a, 12a are movably fitted, respectively, as shown in FIG. In the normal case where the guide roller 12a is located within the lower end 14a of the inclined elongated hole 14 as shown in FIG. The tip type wheel 8 side is rotated upward, and the insertion port PT for the printing paper P is opened wide. Further, during printing when the guide roller 12a is moved toward the upper end 14b of the oblique elongated hole 14, the type support arm 6 is pushed up by the interlocking arm 10 as shown in FIG. 2, and the traction spring 9 is expanded. while rotating counterclockwise in the drawing with the support shaft 5 as a fulcrum, and the tip type ring 8 side is rotated downward toward the printing paper P inserted along the upper guide plate 15 of the lower case 1. It is completed.

Further, 20 and 21 are guide shafts that are horizontally suspended in parallel between the left and right seat plates 3 and 3 so as to be orthogonal to the insertion direction of the printing paper P, and 22 is a guide shaft that moves to both guide shafts 20 and 21. The roller box 22 is shown freely attached, and bearing grooves 22a and 22b recessed in both the front and rear walls of the roller box 22 have both ends 2 of a roller shaft 24 with a printing roller 23 attached in the center.
4a and 24b are rotatably fitted into each other, and further,
Both guide shafts 20,
The upper surfaces of 21 are fitted, and the roller shaft 24 is supported by both guide shafts 20 and 21, and the roller shaft 24 is supported by both guide shafts 20 and 21.
It is designed to roll on 21.

The printing roller 23, which is attached to the middle part of the roller shaft 24 which is supported by the guide shafts 20 and 21 and rotates in a rolling manner in this way, is normally stopped at the center part on the bottom side of the passage into which the printing paper P is inserted. However, the type ring 8
When the downward rotation begins, it first moves initially to the left (downward in FIG. 3) with respect to the insertion direction of the printing paper P (arrow X direction in FIG. 1), and then,
When the type wheels 8 have completely finished descending and pressed the upper surface of the inserted printing paper P, the printing moves to the right (upward in FIG. 3), and each of the lowered type wheels 8 The bottom printing surface is pressed and rolled in order from the edge to perform predetermined printing in a predetermined printing field of the printing paper P interposed between them, and after printing is completed, it returns to the original center position as the printing wheel 8 rises. It is designed to move back and stop, but next, the printing roller 2
The operating mechanism that governs the reciprocating movement of the printing wheel 3 and the vertical movement of the printing wheel 8 will be explained with reference to the drawings.

In the figure, 30 is a main shaft installed in the center of the bottom plate 4,
Reference numeral 31 indicates a rotary disk rotatably attached to the main shaft 30. 32 is a worm gear formed on the circumferential surface of the rotating disk 31, and a worm 34 provided on a rotating shaft 33a of a motor 33 installed in the lower case 1 meshes with this gear 32, as shown in FIG.
When the motor 33 is driven by the engagement between the worm 34 and the worm gear 32, the rotary disk 31 rotates counterclockwise around the main shaft 30 as indicated by the arrow Y in FIGS. It is designed to rotate once per printing.

Further, on the bottom surface of the rotary disk 31, there is a cam groove 3 formed in a generally heart shape as shown by the dotted line in FIG.
5 is recessed, and an operating roller 37 attached to the upper surface of the slide plate 36 near the tip is movably fitted into the cam groove 35. Guide elongated holes 36a and 36b are provided at the tip and middle portions of the slide plate 36, respectively.
The root end 30a of the main shaft 30 is loosely inserted into the distal guide elongated hole 36a, and the bottom plate 4 is also inserted into the intermediate guide elongated hole 36b.
Root end 40a of the crank fulcrum shaft 40 erected above
is loosely inserted, and the slide plate 36 is connected to both the shafts 3.
0,40 in the longitudinal direction of the lower case 1,
That is, it is configured to be slidable in the direction in which the printing paper P is inserted and removed. Reference numeral 38 denotes an actuating plate that stands upright at the root end of the slide plate 36. The roller shafts 12 of the guide rollers 12a, 12a described above are fitted into the actuating groove 38a cut out in the actuating plate 38, and the slide plate 36 The guide roller 12a is configured to move within the inclined elongated hole 14 by sliding in the longitudinal direction.

As the rotary disk 31 rotates counterclockwise, the operating roller 37 is moved and the slide plate 36 is moved.
The cam groove 35 that slides the
When printing is rejected, the operating roller 37 is positioned at point A closest to the main shaft 30 shown in FIG.
6 in the state shown in FIG.
By locating the type wheel 8 on the lower end opening 14a side of the oblique elongated hole 14, the type wheel 8 is held in the raised position as shown in the figure. When rotated, the above A
The actuating roller 37 is gradually moved in the radial direction of the rotary disk 31 from point B to point B, and the slide plate 36 is slid rightward in the drawing to move the guide roller 12a to an inclined length as shown in FIG. It moves to the upper end 14b of the hole 14, and rotates the type wheel 8 down to the state shown in the figure. Furthermore, the above cam groove 35 is connected to the above type ring 8.
The descending state is maintained as the rotary disk 31 rotates from point B to point C in FIG. 4, and after passing point C, the slide plate 36 is gradually slid to the left in the drawing. , move the guide roller 12a back to its original position to raise the type ring 8,
The rotation of the rotary disk 31 is stopped when the operating roller 37 reaches the original point A, and one printing operation is completed. Although not shown in the drawings, in order to determine the stopping position of the actuating roller 37, the cam groove 35 at point A is actually made to have a slightly recessed configuration.

Next, 41 is the cam groove 35 and the slide plate 36
This is a crank plate that causes the printing roller 23 mentioned above to roll for printing in conjunction with the lowering and upward rotation of the type wheel 8 carried out by the crank plate 41. It can be installed freely. Numerals 42 and 43 are elongated crank holes formed in the tip and middle portions of the crank plate 41, respectively.In the elongated crank hole 42 on the tip side, which is formed relatively short, is a driven roller vertically disposed on the bottom surface of the roller box 22. 25 is loosely fitted therein, and a crank roller 44 attached to the upper surface of the rotary disk 31 is loosely fitted into the elongated central crank elongated hole 43.

When the rotary disk 31 is not rotating and is not printing, the crank roller 44 is located on the extension line connecting the crank fulcrum shaft 40 and the main shaft 30, and therefore the crank plate 41 is also used to insert the printing paper P. The roller box 22, that is, the printing roller 23 is located at the center of the lower case 1 while standing still linearly along the direction. When the rotary disk 31 starts rotating in the direction of the arrow Y from this state, the crank roller 44 moves in the left lateral direction with respect to the insertion direction of the printing paper P as shown in FIG. The printing roller 23 is initially moved leftward along the guide shafts 20 and 21. This initial movement is stopped when the rotary disk 31 rotates 90 degrees, and at this point the slide plate 3
The downward rotation of the type wheel 8 due to the slide 6 has been completed. Crank plate 41 after initial movement
is now fan-shaped in the opposite direction (upward in FIG. 3) by the crank roller 44 of the rotating disk 31, which continues to rotate, and in conjunction with this, the printing roller 23 is also moved for printing. A plurality of type wheels 8 arranged side by side with the printing paper P interposed therebetween are rolled while being pressed in order from the end, thereby making it possible to perform predetermined printing on the printing paper P. The position of the crank plate 41 shown in FIG. 3 is during the above-mentioned printing movement, and during the printing movement, the rotary disk 31 rotates 180 degrees from the end point of the initial movement, and the roller box 22 is moved as shown by the imaginary line in FIG. 3. This continues until the guide shafts 20 and 21 are moved to the right end position.

At the end of the printing movement of the printing roller 23,
The return slide of the slide plate 36 causes the type wheel 8 to rise, and the crank roller 44 rotates the remaining 90 degrees to return the print roller 23 to the central stopping point, completing one cycle.

In FIGS. 1 and 2, reference numeral 50 denotes an actuator that adjusts the insertion amount of the printing paper P and starts the motor 33 in response to the insertion.

Since the printing device according to the present invention is as described above, when the printing paper is inserted and the motor is started, the type wheel lowers and rotates, and the printing roller holds the printing paper between them. Since the lowered type wheel is pressed and rolled in order, it is possible to print many sheets at once with a small printing sound and clearly. The rotation and the movement of the printing roller are skillfully constructed by rotating one rotary disk using one motor, and linking the type support frame and the printing roller to each other in conjunction with this rotation. Therefore, the structure of the operating mechanism is greatly simplified and the number of parts is small, making it easy to manufacture and assemble, reducing manufacturing costs and reducing the occurrence of failures, and making adjustments difficult. It has the advantage that the operating timing of the printing roller and type wheel can be easily adjusted because the driving source is common, and it is suitable for use in various printing devices such as time stamps. It is.

[Brief explanation of drawings]

The drawings show a time stamp which is an embodiment of the present invention. FIG. 1 is a side sectional view showing the normal state, FIG. 2 is a side sectional view showing the printing state, and FIG. 3 is a plan view thereof, and FIG. 4 is a plan view of the rotating disk. P... Printing paper, 1... Lower case, 2... Upper case, 6... Type support frame, 8... Type ring,
10... Interlocking arm, 12... Roller shaft, 12a
...Guide roller, 14...Slanted long hole, 20,2
1... Guide shaft, 22... Roller boxes, 23
...Print roller, 31...Rotating disk, 33...Motor, 35...Cam groove, 36...Slide plate, 3
7... Operating roller, 41... Crank plate, 43...
...Crank long hole, 44...Crank roller.

Claims (1)

[Claims] 1. A grooved cam 35 having a generally heart shape as a whole is provided on the bottom surface of the rotating disk 31 which is rotated by the motor 33 which is driven when the printing paper X is inserted. Working roller 3
7 is inserted into the slide plate 36 so that it can freely slide back and forth in the longitudinal direction as the rotating disk 31 rotates.
An interlocking arm 10 is provided which rotates downward to press the type wheel 8 onto the upper surface of the inserted printing paper X.
Further, a crank roller 44 is attached to the upper surface of the rotating disk 31, which engages in the crank elongated hole 43 of the crank plate 41 and rotates the crank plate 41 laterally in a fan shape as the rotating disk 31 rotates. ,and,
The crank plate 41 is connected with a printing roller 23 that presses and rolls a roller surface against the type wheel 8 side that rotates downward in conjunction with the rotation of the crank plate 41 to print on the printing paper X. A printing device featuring: