JPS6017690Y2 - Ink application device for multi-point recorder - Google Patents

Description

[Detailed description of the invention] This invention relates to a multi-point recorder that records various types of data on the same recording paper as a series of color-coded dots according to the data. This invention relates to an ink application device that applies ink to the marking points or printed portions of the printer.

This type of ink applicator applies ink by bringing a drum-shaped ink pad into contact with a so-called dot printing wheel, which is generally a wheel-shaped recording wheel with printing or dot points formed on its outer periphery. It has a structure that encourages

By the way, as a conventional device of this kind,
There is a device described in Publication No. 083, but in this conventional device, the ink pad is rotatably supported at a fixed position above the recording wheel, and the central axis of rotation of the ink pad is not coincident with the central axis of rotation of the recording wheel. are set in orthogonal directions.

For this reason, when the recording wheel is in its raised position, ink is applied by pressing the application surface, which is the rotating end surface of the bottom surface of the ink pad and which is always set on the same plane.

In such conventional devices, the area of the ink application surface on the bottom of the ink pad is inevitably narrow, and since the application surface is always opened downward, ink drips when a large amount of ink is replenished. Not only is there a risk of this, but also there is a problem that, after long-term use, the coated surface is always struck from below at approximately the same depth by the recording wheel, which tends to cause concave deformation on the coated surface.

In view of the above points, this idea was developed by supporting the ink pad so that it can freely rotate in the vertical direction, and by using the outer circumferential surface of the ink pad as the ink application surface, the ink application surface is sufficiently wide and the amount of ink replenishment is increased. It is an object of the present invention to improve the above-mentioned conventional device by making it possible to obtain the desired results and to escape upward when the ink pad is struck from below by a recording wheel.

Next, an embodiment of the ink applicator according to this invention will be described with reference to the drawings. FIG. 1 is a perspective view of a dot printing carriage having an ink applicator, FIG. 2 is a bottom view of the same, and
4 is a sectional view taken along line 2--2 in FIG. 2, FIG. 5 is a sectional view taken along line 2--2 in FIG. 2, and FIG. 6 is an explanatory diagram of the operation of the ink application device.

In the figure, reference numeral 1 denotes a carriage that is moved in a direction perpendicular to the running direction of the recording paper 2 according to input values. A marking wheel 3 and a printing wheel 4 are provided as recording wheels to be closed.

The marking wheel 3 and the printing wheel 4 are pivotally connected to opposite ends of a marking lever 5 and a printing lever 6, which are lift levers that are pivotally mounted in the carriage 1, respectively. A support arm 8 supporting a drum-shaped ink pad 7 is pivotally attached to the pivot portion.

This ink pad 7 is positioned above the dot printing wheels 3 and 4, and a cam mechanism inside the carriage 1 allows the ink pad 7 and the dot printing wheels 3 and 4 to be connected during dot printing and rotation. Configured to be in contact with the exception.

In detail, the outer periphery of the marking wheel 3 is marked with ・ and ○.
A total of 24 marking points 3a, 12 each for displaying points.
1 to 24 are formed on the outer periphery of the printing wheel 4.
Printed characters 4a with numbers are formed.

The dot lever 5 and the print lever 6, which separately pivot the dot print wheels 3 and 4, have a symmetrical structure.
, 4 are pivotally connected, and a gear train mechanism for rotating the mark printing wheels 3 and 4 is installed between these plates. It is set up.

Further, the mark printing levers 5 and 6 are pivoted through the fulcrum shaft 10 at equal distances from their respective tips, and the outer plates 5a and 6a of the respective levers 5 and 6 are attached to the fulcrum shaft 10 at equal distances from their tips. Operating arms 11 and 12 extend rearward in a straight line.

The operating arms 11, 12 are engaged and disengaged by an external mechanism, and include a printing wheel 4 or a dot printing wheel;
4 is prevented from falling in a timely manner.

The inner plates 5b and 6b of the mark printing levers 5 and 6 are bent downward from the fulcrum shaft 10, and this bent portion serves as a cam receiving lever 13.14. A bearing wheel 15 is attached to the lower end of the cam receiver lever 13.14.
．． 16 are provided.

The support α shaft 10 has an intermediate portion that is connected to the carriage frame 1.
The carriage frame 17 is fixedly supported by a support arm 18 which is formed to protrude from the carriage frame 7, and the carriage frame 17 is formed into a plate shape bent into a substantially inverted U-shape.

An annular shaft 19 and a cam shaft 20 are inserted between the left and right frames 17a of the carriage frame 17, and extend within the annular shaft 19 in a direction perpendicular to the running direction of the recording paper 2. The drive shaft 21 is inserted and fitted, and this drive shaft 21
and the annular shaft 19 are slidable in the axial direction and are integrated in the direction of rotation.

A gear 22 is formed on the outer periphery of the central portion of the annular shaft 19, and meshes with the gear 23 formed on the camshaft 20 at the same number of teeth ratio.

This camshaft 20 has a marking cam 24 with the gear 23 sandwiched therebetween.
and a printing cam 25 are formed, and further this cam 24.25
Geneva active gears 26, 26 are formed on the outside of each.

The marking cam 24 and the printing cam 25 have a shape in which a part of the outer periphery is shaved and a part of the outer periphery on the side substantially opposite to this scraped part is raised.
The shaved portions of the print cam 4 and the printing cam 25 are set at locations that coincide with each other, and the raised portions are set at locations that are offset from each other by about 30 degrees.

Further, the marking cam 24 and the printing cam 25 are respectively engaged with the bearing wheels 15.16 of the cam receiving lever 13.14, so that the marking printing levers 5, 6 can move up and down with the fulcrum shaft 10 as a fulcrum. It is made to sway.

On the other hand, the Geneva active gears 26, 26 are meshed with a Geneva passive gear 27.27 which is loosely inserted into the fulcrum shaft 10 at a tooth ratio of 1:6.
Gears 28 and 28, which are formed integrally with 27 and loosely inserted into the fulcrum shaft 10, are connected to the large diameter portion 29 of the reduction gear 29 and 30, respectively.
a, 29 meshed with a.

The small diameter portions 29b, 29b of this reduction gear 29.29 are meshed with a wheel coaxial gear 30.30, which is connected to a wheel shaft 31.31 integral with the marking wheels 3, 4. It is fixed.

Incidentally, the reduction gear 29. is smaller than the Geneva passive gear 27.27.
29 to the wheel coaxial gear 30.30 is set to 1:4, and as a result, the mark printing wheels 3 and 4 rotate intermittently by 1124 rotations for every rotation of the drive shaft 21. It will be done.

On the other hand, the support arm 8 is pivotally attached to the fulcrum shaft 10, and a cam bearing shaft 32 is formed at the lower end of the support arm 8 as a part of the extension, and a shaft 32 is formed at the upper end of the support arm 8. A drum-shaped ink pad 7 is pivotally mounted.

This ink pad 7 has partition plates 33 formed at equal intervals radially from the center.
A felt 34 is stuffed between each of the felts 34, and each felt 34 is moistened with one drop of ink.

Further, the ink pad 7 is attached to the pivot portion of the ink pad 7.
A gear 35 is formed integrally with the support arm 8, and this gear 35 meshes with the gear 28 of the fulcrum shaft 10 at a tooth ratio of 2=1 via transmission gears 36, 36 provided at the intermediate portion of the support arm 8. There is.

As a result, every time the dot printing wheels 3 and 4 rotate 1 to 24 times, the ink pad 7 is rotated intermittently for 1 rotation at the same timing.

Further, the cam bearing shaft 32 formed at the lower end of the support arm 8 is engaged with a pad-side cam 37 as an engagement portion formed integrally with the Geneva active gear 26.
Marking point, when the printing wheel 3°4 falls, and when the same wheel 3,
4 and the ink pad 7 when the ink pad 7 rotates.
is set so that it can be lifted upward and backward using a fulcrum shaft 10 as a fulcrum.

Next, the effects of the configuration described above will be explained.

First, the carriage 1 is moved to a position corresponding to the axial direction of the drive shaft 21 in response to an input signal.

Next, by rotation of the drive shaft 21, the mark printing cam 24, 25
When the shaved portion of the cam receiver engages with the bearing wheel 15.16 of the lever 13.14, the marking wheel 3.4 rotates around the fulcrum shaft 10, as shown in I in FIG. and is caused to fall onto the recording paper 2.

In this way, marks are printed on the recording paper 2 by the marks located at the lowest ends of the wheels 3 and 4.

At this time, the shaft 32 and cam 37 of the cam receiver of the ink pad 7 are engaged with each other, so that the ink pad 7 is held upward apart from the wheels 3 and 4.

Therefore, the dots are printed on the recording paper 2 at accurate positions without being affected by the ink pad 7.

Next, the driving force of the drive shaft 21 rotates the wheel 3.4 by 1724 rotations via the Geneva gears 26 and 27, and rotates the ink pad 7 by 1 rotation.

At this time, since the shaft 32 and cam 37 of the cam receiver are engaged, the ink pad 7 and the wheels 3 and 4 are separated from each other as shown in H in FIG. , can be rotated without being rubbed by f-le 3.4.

Next, the shaft 32 and cam 37 of the cam receiver were disengaged, and the protrusion of the printing cam 25 and the bearing wheel 16 of the printing lever 14 were engaged, and the printing wheel 4 came into contact with the ink pad 7. The printing wheel 4 is then lifted upward, and the printing wheel 4 is coated with ink as shown in (■) in FIG.

Next, the protruding portion of the marking cam 24 and the bearing wheel 16 of the marking lever 13 engage with each other, and the marking wheel 3 is coated with ink as shown in (■) in FIG. 6.

By repeating the above steps, ink application and dot printing are sequentially performed.

Further, when applying the ink, the ink pad 7 is struck from below by the wheels 3 and 4, and therefore the surface of the felt 34 is struck, and the fibers in that area become dense.

Therefore, since the ink is concentrated on the surface of the ink pad 7, ink is supplied to each wheel 3, 4 for a long time.

In addition, in the above embodiment, the support arm 8 of the ink pad 7
The proximal end extension of the cam 37 is abutted and engaged with the lower surface of the cam 37 from below, but instead of the cam 37, a locking pin as an engaging portion is provided protruding from an appropriate position on the carriage frame 17.
By abutting and engaging the locking pin and the support arm 8 in the same manner as described above, it is possible to prevent the wheel 3.4 from coming into contact with the ink pad 7 during marking and rotation.

As explained above, according to this invention, the ink pad is pushed upward by the recording wheel only when it makes contact with the rising wheel, so that the recording wheel hits the ink-applied surface of the ink pad. is relaxed,
Even after long-term use, the coated surface does not undergo concave deformation, and the contact time between the ink pad and the recording wheel is extended during the upward movement time, so that sufficient ink is always coated on the recording wheel. This has the effect of making it possible to obtain clear records.

In addition, according to this invention, since the ink pad's rotating outer peripheral surface is the ink application surface, by extending the axial length of the ink pad, the lateral area of the application surface can be reduced. Not only can it be formed to be wide and wide, making it possible to use a variety of recording wheels and supplying a large amount of ink, but also because the application surface is rotated up and down during operation, there is no ink dripping. This has the effect of reducing the risk of

[Brief explanation of drawings]

Figure 1 is a perspective view of a dot printing carriage having an ink applicator according to this invention, Figure 2 is a bottom view of the same, Figure 3 is a side view of the same, and Figure 4 is the line ■-■ of Figure 2. FIG. 5 is a cross-sectional view taken along line 1--2, and FIG. 6 is an explanatory diagram of the operation of the ink application device. 1... Carriage, 2... Recording paper, 3
・・・・・・Marking wheel as a recording wheel, 4.
...Print wheel as recording wheel, 5...
...Mark lever as a lifting lever, 6...
・Printing lever as a lifting lever, 7... Ink pad, 8... Support arm, 10...
・Fulcrum shaft, 24... Marking cam, 25...
- Printing cam, 32... The support arm is an extension of the shaft, 37... The pad side cam is the engaging part. Figure 3

Claims (1)

[Scope of utility model registration request] The carriage is provided with a carriage that is moved in a direction perpendicular to the running direction of the recording paper according to an input value, and at least inside this carriage, there is a carriage that moves up and down and also descends to form a predetermined mark point or print record on the recording paper. A multi-point recording system in which a recording wheel that applies ink sequentially and an ink pad that is provided above the recording wheel and that contacts and applies ink when the recording wheel rises are respectively provided so as to be able to rotate at predetermined timings. In the ink coating device, the recording wheel and the ink pad have their respective rotational center axes set in a direction parallel to the traveling direction of the carriage, and the rotating outer circumferential surface of the recording wheel is a recording surface, In addition, the rotating outer circumferential surface of the ink pad facing the ink pad is an ink application surface, and the base end of the recording wheel is attached to the tip of an elevating lever that is pivotably supported vertically relative to the carriage. The ink pad is pivotally supported at the distal end of a support arm whose proximal end side is pivotally supported to be vertically rotatable with respect to the carriage, and the ink pad's proximal end side is pivoted to the distal end of a support arm that is pivotably supported vertically relative to the carriage. An ink application device for a multi-point recorder, characterized in that an extension from the pivot point is supported from below in contact with a lower surface of an engaging portion provided on the carriage.