JPH0245992B2 - - 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 a printing surface.

In conventional printing machines, the type wheel is always positioned at a distance from the printing paper (for example, at the top) so that the printing surface of the printing paper inserted into the printing machine can be visually observed. The ring is pressed and rotated (dropped) toward the printing paper using a magnet or motor.
Alternatively, printing is performed by striking a printing hammer against the type wheel with a magnet, but in the case of the type wheel rotation method using a magnet and the printing hammer striking method, the space between the type wheel and the printing paper is wide. Due to the unique structure of the printing machines used in the printing presses, the magnets need to be strong, and both methods produce large impact noises during printing, severe abrasion of type due to impact, and frequent failures of various parts of the equipment. There was a problem.

The present invention was developed in order to improve the above-mentioned problems, and its purpose is to reduce impact during printing, reduce printing noise, provide good print clarity, and print a large number of sheets at once. An object of the present invention is to provide a printing device for an open mouse type printing machine that is devised so that printing can be performed and the printing position can be easily confirmed from the outside. , the type wheel is configured to rotate toward the print paper by a toggle mechanism using a motor as a drive source, and the print roller is moved using the motor as a drive source, with the print paper interposed between them. The printing wheel is configured to elastically press and roll onto the printing surface of the rotating printing wheel to print.

Next, a preferred embodiment of the above-described printing device according to the present invention will be described in detail with reference to the accompanying drawings.

Among the attached drawings, FIGS. 1 to 4 show a time stamp which is an embodiment of the printing device according to the present invention, and in these drawings, 1.
0 is a lower case, 11 is an upper case attached to the lower case 10 in an open state, 12 and 12 are left and right seat side plates attached to the lower case 10, and 13 is a bottom plate of the lower case 10. Above left and right seat boards 12,1
Support plates 12a, 12a protruding into the upper case 11 in an inverted L-shape are connected to each rear end of 2, and a type support arm is attached to a support shaft 14 installed between these support plates 12a, 12a. 15 is rotatably attached. 16 is this type support arm 15
A type shaft installed at the tip of the type shaft 16. A plurality of type wheels 17 of various types, such as minutes, hours, dates, days of the week, etc., are attached to the type shaft 16 so that the digits can be moved freely. The entire type support arm 15, including the rings 17, is constantly pulled and rotated to the raised position shown in FIG. 1 by a traction spring 15a. Reference numeral 18 denotes an interlocking arm that is rotatably pivoted at a substantially right angle with a connecting shaft 19 at the rear end of the type support arm 15. Both ends are movably inserted and supported into guide elongated holes 21, 21 bored at the respective rear end sides of the left and right seat side plates 12, 12.

As detailed in FIG. 6, each of the guide elongated holes 21 is a crank hole in which upper and lower horizontal portions 21b and 21c are connected to each other at the upper and lower ends of an inclined hole 21a. 20 is in the lower horizontal part 21c, the type support arm 15 is pulled by the interlocking arm 18 and moves the tip type ring 17 around the support shaft 14.
The printing paper (not shown) is rotated so that its side is housed in the upper case 11 as shown in FIG. 1, and is inserted in the direction of the arrow X in FIG. ) is opened wide so that the printed surface of the inserted printing paper can be fully visually confirmed from diagonally above. Further, the above-mentioned operating shaft 20 passes through the inclined hole 21a to the upper horizontal section 21.
When moved to position b, the type support arm 15 is pushed by the interlocking arm 18 and prints around the support shaft 14 with the tip type ring 17 facing downward as shown in FIG. 4 while stretching the traction spring 15a. It is designed to move.

Next, the operating shaft 20 is inserted into the guide elongated holes 21, 21.
A toggle mechanism (reduction gear mechanism) that moves up and down along the figure will be explained with reference to the drawings.

In Figures 1 to 4 and Figure 7, 3
Reference numeral 0 denotes a mount mounted on the bottom plate 13 in the lower case 10 with a vertical interval therebetween, and 31 is a motor serving as a drive source for the toggle mechanism installed on the mount 30. 32 is a bevel gear shaft erected on the mounting base 30, and an interlocking bevel gear 33 attached to this shaft 32 meshes with the drive bevel gear 31a of the motor 31. Reference numeral 34 denotes a drive small-diameter gear integrally formed with the interlocking bevel gear 33. A first reduction large-diameter gear 36 attached to a mounting shaft 35 on the mounting base 30 meshes with this small-diameter gear 34, and the upper surface of this large-diameter gear 36 The small diameter gear 37 integrally formed with the mounting base 30
The second reduction large diameter gear 40 attached to the upper mounting shaft 38
are meshing. Reference numeral 42 designates a rotating arm that is horizontally rotatably attached to a support shaft 41 erected on the bottom plate 13, and a guide protrusion 43 that projects upward at the tip of the rotating arm 42 has a roller 43a that rotates. The roller 43a is freely attached to the grooved cam 4 recessed in the bottom surface of the second reduction large diameter gear 40.
The operating shaft 20 is fitted into a concave rotation groove 44a of a rotation plate 44 which is fitted into the rotation arm 42 and protrudes from the side of the rotation arm 42 in a substantially L-shape. According to the rotation of the second reduction large diameter gear 40, the grooved cam 40a
When the rotating arm 42 is laterally rotated about the support shaft 41, the rotating plate 44 guides the operating shaft 20 from the lower horizontal portion 21c to the upper horizontal portion 21b of the elongated hole 21.
The printing wheel 17 is rotated (lowered) and returned (raised) by moving it from the upper horizontal section 21b to the lower horizontal section 21c.

The grooved cam 40a is attached to the roller 43a of the rotary arm 42 at the point 40a1 shown in FIG.
is positioned, that is, in the state shown in FIG. 2, is the stop time. At this time, the rotary plate 44 grips the operating shaft 20 in the lower horizontal portion 21c of the guide slot 21,
The type wheel 17 is kept stationary at the upper position shown in FIG. Further, when the second reduction large-diameter gear 40 starts rotating via the reduction gear mechanism described above by starting the motor 31, the grooved cam 40a moves between the points 40a1 and 40a2 shown in FIG.
a gradually to the radius (outside) and turn the rotating arm 4.
2 in the clockwise direction in the drawing, the rotating plate 44 pushes the operating shaft 20 from the lower horizontal portion 21c of the guide elongated hole 21 toward the inclined hole 21a, thereby pulling the type wheel 17. It is gradually lowered against the spring 15a. The roller 43a is the grooved cam 40a
According to the rotation of the point 40a2 shown in FIG.
to 40a3, the rotary plate 44 pushes the operating shaft 20 into the upper horizontal portion 21b of the guide elongated hole 21, and moves the type ring 17 to the printable position shown in FIG. The printing surface descends to a position where it presses the top surface of the inserted printing paper, and while it is descending, it receives pressure from a printing roller, which will be described later, to perform printing. Between the points 40a3 and 40a1 shown, the type wheel 17 is gradually raised to the starting position shown in FIG. 1 by the traction spring 15a, and one printing is completed in one rotation. In FIGS. 1, 3, and 4, reference numeral 45 denotes an actuator that starts the motor 31 by being pushed by the inserted printing paper.

Next, the operating mechanism of the above-mentioned printing roller will be explained with reference to the drawings.

In FIGS. 1 to 4 and 7, the reference numeral 50 indicates a printing roller slide base that is installed on the inner bottom of the lower case 10 so as to be horizontally slidable. is divided into a rear base 50b that slides in contact with the top surface of the bottom plate 13 by a stepped portion 50a in the center, and a front base 50c that slides apart from the bottom plate 13, and the rear base 50b is attached to the mounting base 30. It is inserted on the bottom side of the. Further, at the four corners of the slide base 50 having the above configuration, left and right seat side plates 12,
Guide rollers 51 for moving the slide base 50 in parallel along the rear base 50b are respectively attached, and a rack 52 is formed upright on one side edge of the rear base 50b. This rack 52 is configured to be able to freely mesh with an intermittent gear portion 53a of a feed gear 53 that is integrally formed on the upper surface of the second reduction large diameter gear 40.
While the grooved cam 40a mentioned above is lowering the type wheel 17 to the printable position shown in FIG. The entire base 50 is moved and slid to the left in the drawing against the traction spring 54.

The above-described intermittent gear portion 53a rotates at point 4 of the grooved cam 40a as the second reduction large-diameter gear 40 rotates.
Immediately after the roller 43a reaches 0a2, that is, immediately after the type wheel 17 descends to the printable position, it engages with the rack 52 and begins to slide on the slide base 50. The feed gear 53 is selectively formed on the circumferential surface of the feed gear 53 so that the movement continues immediately after passing the point 40a3 of the point 40a, that is, until the point when the type wheel 17 starts to rise.
3a is removed from the rack 52, the entire slide base 50 is pulled by the spring 54 and slid back to the starting position shown in FIGS. 1 and 2.

The printing roller 60 is rotatably attached to a roller shaft 60A installed between support arms 50d, 50d raised on both sides of the front base 50c. 60a, 60a are rolling rollers coaxially attached to both the left and right sides of the printing roller 60, and 61 is a printing roller stand. The entire roller stand 61 is supported by support brackets 61A, 6 provided on the left and right sides of the bottom plate 13.
1A so as to be movable up and down, and the lower ends of the coiled springs 64, 64 housed in the left and right spring chambers 63, 63 recessed in the bottom side are brought into elastic contact with the bottom plate 13, so that the entire structure is Guide portions 61B, 61B placed under the action of springs 64, 64 and acting upwardly and protruding from the left and right upper surfaces thereof are elastically pressed against the respective bottom surfaces of the rolling rollers 60a, 60a. In the figure, reference numerals 62 and 62 are support shafts that guide the vertical movement of the roller stand 61. slide base 50
guide portions 61B provided on the left and right upper surfaces of the roller stand 61, on which the rolling rollers 60a, 60a provided on the left and right sides of the printing roller 60 roll according to the slide of the printing roller 60;
61B is formed in a convex shape with a high central portion 61B1, and when rolling, the rolling roller 60a receives the strongest elastic force of the coiled springs 64, 64 at this central portion 61B1, and the printing roller 60 It rolls while strongly pressing the upper surface against the type surface side of the type wheel 17 that has been lowered to the printable position, thereby making it possible to print by pressing the printing paper against the type surface coated with ink. be.

Also, at this time, the type wheel 17 includes a gear reduction mechanism using a motor 31 as a driving source, an operating shaft 20 that moves within the guide elongated hole 21 toward the upper horizontal portion 21b by a grooved cam 40a, and movement of this operating shaft 20. The lowering state is controlled by a toggle mechanism consisting of an interlocking arm 18 that rotates the type support arm 15 around the support shaft 14 and lowers the type wheel 17 to the printable position. Due to the strongly held relationship,
It is possible to reliably receive the strong pressure rolling of the printing roller 60 and perform clear printing, and
By intervening carbon or using non-carbon paper, it has become possible to print clearly on many sheets at once.

Since the printing device according to the present invention is as described above, the printing device according to the present invention is capable of printing using the powerful printing rotation of the type wheel by the toggle mechanism and the elastic pressing and rolling movement of the printing roller against the rotated type wheel. It solves the problem of printing sound and print clarity, which are the biggest drawbacks of printing machines, and allows printing many sheets at once with low printing noise and clearly printing, and also allows the type ring to be kept at all times. Because it is configured in an open mouth type configuration located at the top, it has the advantage that the printing paper insertion opening is wide and the printing part of the inserted paper can be visually confirmed from diagonally above. It is also economical in that the movement of the roller can be accomplished with one small motor, and is suitable for use in various types of printing machines, including the illustrated time stamp.

[Brief explanation of drawings]

FIG. 1 is a side sectional view of a time stamp that is an embodiment of the present invention, FIG. 2 is a plan view of the main part thereof, and FIG.
The figures are a sectional view taken along line A-A in Figure 1, Figure 4 is a side sectional view showing the state during printing, Figure 5 is a plan view explaining the relationship between the grooved cam and the rotating arm, and Figure 6 is A side sectional view illustrating the relationship between the guide elongated hole and the operating shaft, and FIG. 7 is a perspective view of the mounting base and the slide base. 10...Lower case, 11...Upper case, 12...
...Side plate, 15... Type support arm, 15a... Traction spring, 17... Type ring, 18... Arm, 20... Operating shaft, 21... Guide slot, 31
... Motor, 36, 40 ... Reduction large diameter gear, 40
a...Groove cam, 42...Rotating arm, 43a...
Roller, 44... Rotating plate, 50... Slide base, 52... Rack, 53... Feed gear, 60...
...Print roller, 60a...Rolling roller, 61...
Print roller stand, 61B...Guide surface section, 61B1
...Central part made into a convex shape, 64...spring.

Claims (1)

[Scope of Claims] 1. A type support frame with a type ring attached to its tip is attached to the upper case, which is attached with the insertion port wide open to the lower case, so as to be movable up and down,
The type ring side of this type support frame is constantly pulled upward by a traction spring so that the printing surface of the printing paper inserted from the insertion slot can be visually seen, and is connected to the root end of the type support arm. An operating shaft that can move up and down diagonally along the guide slot bored in the side plate of the lower case is attached to the interlocking arm, and this operating shaft is used as a toggle to reduce and transmit the rotation of the motor using a reduction gear. The mechanism is configured to push the type support arm diagonally upward, thereby rotating the type support arm and pressing the type ring against the printing surface of the inserted printing paper. Inside, a slide base that is slid by the toggle mechanism according to the press operation of the type wheel, and a printing roller stand that has a guide surface provided on the top surface with a convex central portion are installed. The entire print roller stand is placed under the action of a spring that always springs upward, while the slide base has the bottom side of the print paper pressed by the type ring pressed by the print roller when the slide moves. A printing device characterized by being equipped with a printing roller that presses and rolls while being guided by a guide surface of a stand.