JPS61173943A - Daisy serial printer - Google Patents

Abstract

PURPOSE:To enhance operability by preventing the complicatedness in the replacement operation of a printing wheel, by integrating a carriage to revolve the same around a guide shaft and enabling the upward oscillation of said carriage while making the printing wheel revolvable to a wheel replacement position by switch operation. CONSTITUTION:When the replacement of a printing wheel 22 is performed, the wheel replacement switch 42a in a switch 42 is pushed to automatically revolve a carriage A to a wheel replacement position and a locating projection 23b is brought to the uppermost position to be stopped to open a cover 39. A revolving lever 36 is detached from a rear stay 21 and the carriage A and a card wheel 28 are revolved to replace the printing wheel 22. Because the locating projection 23b is present at the uppermost position easy to look from above, the printing wheel 22 can be easily replaced even if the revolving angle of the carriage A is small. By enabling the movement of the carriage to the replacement position by switch operation as mentioned above, the movement of the carriage by manual operation becomes unnecessary and the operability at the time of replacement can be enhanced.

Description

DETAILED DESCRIPTION OF THE INVENTION This invention is characterized in that while a carriage is guided by a guide shaft and moved along a platen, a print wheel mounted on the carriage is rotated to sequentially print desired characters. The present invention relates to a digital serial printer that selects printed characters and hits the selected characters with a printing hammer to sequentially print on sheets of paper set on a platen.

Follow the rice course Conventionally, in this type of digital serial printer.

As shown in Figure 5, the carriage (a) is connected to the truck part (b).
and a rotating part (c). And 1 bogie part (
b) a guide shaft (2) parallel to the platen (1);
and is guided by the guide shaft (2) to move along the platen (1). Reference numeral (3) in the figure is a card holder held by the cart (b), which guides the inserted paper (4). On the other hand, the rotating part (C) is a printing wheel that is rotatably supported on the carriage part (b) around the mounting shaft (5) and has a plurality of characters (6a) on the outer periphery. (6)・Selection motor (7) that rotates its print wheel (6) to select the desired type (6a)
)・Printing hammer (8) that hits the selected type (6a)
Equipped with etc.

In this way, since the carriage (a) is composed of the trolley part (b) and the rotating part (c), the position of the mounting shaft (5) can be set relatively arbitrarily. carriage(
No matter where a) is, the rotating part (c) can be rotated about its mounting shaft (5) as a fulcrum, and can always be raised greatly as shown by the dashed line in the figure.

Therefore, when replacing the printing wheel (6) with a different type, for example with another font or other characters, or when replacing the printing wheel with a new one due to damage, it is necessary to use it once regardless of the position of the carriage (a). The moving part (c) was raised and the printing wheel (6) was being replaced.

However, in this type of conventional digital serial printer, the carriage (a) is composed of a dolly part (b) and a rotating part (C), so the weight of the carriage is low. This has the disadvantage of hindering the miniaturization of the space motor and reducing the printing speed.It also has the disadvantage of increasing the number of parts.

Therefore, for this type of digital serial printer,
It is conceivable to integrate the carriage (a) to reduce the weight of the carriage, reduce the number of parts, and reduce costs. In this case, it is preferable that the carriage (a) rotates around the guide shaft (2) so that the print wheel (6) can be replaced.

However, the carriage (a) is driven by a space motor (11) via a traction member (10) such as a belt or wire, as shown in FIG. Therefore, the carriage (,
) and guide shaft (2) when changing wheels.
If the carriage (a) is rotated around , the traction member (10) fixed to the carriage (a) will be twisted as the carriage (a) rotates. For this reason, the carriage (A) is attached to the left and right pulleys (12
)・(13), the corresponding carriage (A)
cannot be rotated significantly. For example, as shown by the dashed line in Fig. 6, the carriage (A) is
), the rotation angle of the carriage (a) is limited and the printing wheel (6) cannot be replaced. Therefore, the carriage (a) is connected to the left and right pulleys (12).
・When it is near (13), there is the trouble of having to manually move the carriage (a) to the central position shown by the solid line in Figure 6, where it can be rotated widely. Ta.

Therefore, it is an object of the present invention to integrate a carriage in a digital serial printer, prevent the wheel replacement operation from becoming complicated, and improve operability.

. Therefore, the present invention integrates a carriage (A) and a guide shaft (2) in a digital serial printer.
A print wheel (22) that rotates around 0) and is capable of raising its neck, and is equipped with the integrated carriage (A).
The wheel can be rotated to the wheel exchange position by operating a switch.

However, in the digital serial printer according to the present invention, the print wheel (22) is automatically moved to the wheel exchange position by operating the wheel exchange switch (42a) or by opening the cover (39). Rotate to. Then, it rotates around the guide shaft (20) to raise the carriage and print wheel (20).
2) can be exchanged. After replacement, the carriage (A) is returned to its original position and the cover (39) is closed to complete the replacement of the print wheel (22).

This invention will be described in detail below along with an embodiment shown in the drawings.

In FIGS. 1 to 3, reference numeral (A) in FIG. 0, which indicates a carriage portion of a digital serial printer according to the present invention, is an integral carriage.

The integral carriage (A) has a dolly part and a rotating part integrated into one carriage body (B) supported by a guide shaft (20) and a Yasuchi (21), and a printing wheel (
22)・Selection motor (23)・Printing hammer (2)
4) etc. are all installed.

Now, the carriage body CB) consists of a bearing part (25), an upright plate part (26), and a frame plate part (27).
A guide shaft (20) is inserted through 25), and the carriage (A) is guided by the guide shaft (20) so that it can move left and right along the platen (28). The bearing part (
25), the lower end of the standing plate part (26) is fixed.

A selection motor (23) is fixed to the vertical plate part (26) at a central position on the front (front) side. The drive shaft (23a) of the selection motor (23) passes through the upright plate portion (26) and projects forward. Then, the printing wheel (
22) is attached and rotated by a selection motor (23) to enable selection of desired characters among the printed characters (22a) on the outer periphery. Further, a printing hammer (24) is fixed to the upright plate portion (26) at the upper front position. The printing hammer (24) then presses the selected type (22).
Make it possible to hit a). By the way, this standing board part (2
6), a ribbon guide (28) is further attached to the upper position. The ribbon guide (28) is connected to the printing hammer (24).
) is rotatably supported by support shafts (29) located at left and right positions.

At normal times, tension springs (30) and (31) are used to provide a counterclockwise rotational behavior in the figure, and the protrusion (28a) is moved from the upright part (26) as shown in Figures 1 and 2. Both shoulders (26
Stop by hitting a). However, as shown by the arrow (A) in FIG.
8) in the clockwise direction in the figure to the state shown in FIG. is the standing board part (2
6) and comes to a stop. In the illustrated embodiment, a card holder (
32) Attach.

Then, a frame plate part (27) is attached to the upper part of the standing plate part (26) five places in front. Both side plates (27) of the frame plate part (27)
a) and (27b) have locking pins (33) on the inner surfaces, respectively.
(34) and the tension springs (30) and (31) mentioned above.
Hang the other end.

Further, a mounting plate (35) extending one direction toward the front is fixed to the side tilting plate (27a). This mounting plate (35) has
The rotary lever (36) is rotatably attached by holding its knob (36a). When the rotating lever (36) extends straight toward the front as shown in FIGS. 1 and 2, it is placed on the rear stay (21) and supports the carriage (A). When the rotating lever (36) is rotated with the knob (36a), it is disengaged from the rear stay (21), and the carriage (A) is rotated around the guide shaft (20) as shown by the arrow (b) in Figure i3. can be rotated clockwise in the figure.

In the digital serial printer shown in FIGS. 1 to 3, as shown in FIG. 6, a traction member (lO) such as a wire belt is fixed to the carriage (A), and the traction member (10) is passed between left and right pulleys (12) and (13), and one pulley (13) is driven by a space motor (11) to move the carriage (A). The carriage (A) is guided by a guide shaft (20) and moves along the platen (28). at the same time,
Drives the selection motor (23) and prints the print wheel (
22) to sequentially select desired characters (22a). Then, apply the selected type (22a) with the printing hammer (
24) and set the paper (3) on the platen (28).
7) are sequentially printed.

Now, the digital serial printer described above is housed in a case (38) shown in FIG. Figure 4 Neutral number (39
) is the cover, (40) and (41) are the platen knobs.

(42) are various switches.

When replacing the print wheel (22) in this type of digital serial printer, press the wheel replacement switch (42a) among the various switches (42), and then the print wheel (22) will be replaced. It automatically rotates to the wheel exchange position and stops with the positioning protrusion (23b) at the uppermost position as shown in FIG.

After that, as shown by the dashed line in Fig. 4, cover (39)
open it. Here, pressing the wheel exchange switch (42a) and opening the cover (39) may be reversed, so that the wheel exchange switch (42a) described above is pressed after opening the cover (39). Then, turn the rotation lever (36) to remove it from the rear stay (21), rotate the carriage (A), and rotate the card holder (28).
) is also rotated to bring it into the state shown in FIG. 3, thereby making it possible to replace the printing wheel (22).

As mentioned above, since the positioning protrusion (23b) is at the top position where it can be easily seen from above, the carriage (
Even if the rotation angle of A) is small, the printing wheel (22) can be easily replaced. After the wheel is replaced, the carriage (A) and card holder (28) are returned to their original positions, and the rotary lever (36) is engaged with the rear stay (21) to return to the state shown in FIGS. 1 and 2.

Then close the cover (39) and press the print wheel (22).
end the exchange.

By the way, in the embodiment described above, opening and closing of the cover (39) and turning on and off of the wheel exchange switch (42a) are performed by separate operations. However, the wheel exchange switch may be turned on and off by automatically operating the switch, for example, by opening and closing the cover.

Furthermore, in the embodiment described above, when the switch is operated, the printing wheel (22) is rotated to the wheel exchange position. However, at this time, the carriage (A) may also be moved to a position where wheel replacement is easy, such as a central position between both pulleys (12) and (13).

By the way, in the embodiment described above, the print wheel replacement position was also set at the position where the positioning protrusion (23b) was at the uppermost position. However, the wheel replacement position may be any position where the print wheel can be replaced most easily, and is not limited to the uppermost position.

As mentioned above, in the digital serial printer according to the present invention, the carriage is integrated, and when changing the wheel, the printing wheel is moved to the wheel changing position by operating a switch, and then rotated around the guide shaft to raise the head. . therefore.

According to this invention, the carriage is integrated.

Reduce the weight of the carriage and downsize the space motor.
In addition, it is possible to increase printing speed, reduce the number of parts, and reduce costs. In addition, since the printing wheel can be moved to the wheel replacement position by operating a switch, the printing wheel can be replaced without having to manually move the carriage to the printing wheel replacement position when replacing the wheel. can improve sexual performance.

[Brief explanation of the drawing]

1 to 3 show the carriage portion of the digital serial printer according to the present invention, FIG. 1 is a perspective view of the printing state, FIG. 2 is a side view of the printing state, and FIG. 3 is the carriage when replacing the printing wheel. FIG. 3 is a side view with the head raised. FIG. 4 is an external perspective view of the printer shown in FIGS. 1 to 3. FIG. FIG. 5 is a side view of a carriage portion of a conventional digital serial printer. FIG. 6 is a schematic diagram of a spacing mechanism showing the carriage feeding of the printer of the present invention and the conventional printer described above.

Claims (1)

[Claims] A digital serial printer with an integrated carriage that can be raised around a guide shaft, and a printing wheel mounted on the integrated carriage that can be rotated to a wheel exchange position by operating a switch.