JPS59145169A - Printer - Google Patents

Abstract

PURPOSE:To enable to reduce the size and weight of a type drum, by a method wherein a plurality of type bars each of which comprises projected form types provided at arbitrary intervals on the outside periphery of a frame polygonal or circular in cross-sectional shape are provided at the outside periphery of a type drum, in a Japanese-character typewriter or the like. CONSTITUTION:A typewriting paper 103 is moved to a printing position by providing a plante 101, while the type drum 104 is moved to a predetermined printing position, an arbitrary one of the type bars 109 is selected by rotating the type drum 104, and an arbitrary type face is selected by rotating the bar 109, whereby a predetermined type 110 is fed to a printing position. On the other hand, an ink ribbon 160 is taken up by a predetermined amount, a printing hammer is operated by a solenoid 145 to move the type bar 109 upwards, thereby printing. At the peripheral surface of the type drum 104, a plurality of type bars 109 each of which is polygonal or circular in cross-sectional shape and comprises the types 110 integrally or detachably fitted to type faces thereof are provided so that they can be protruded and retracted through return springs. Accordingly, the type drum is made to be compact, whereby the moment of inertia is reduced, and it is enabled to print at a higher speed.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a printing device such as a Japanese typewriter using type, and particularly to a printing device having a compact type portion.

Conventional Structure B Problems Generally speaking, a Japanese typewriter using metal type is well known as a printer using type.

Although Japanese typewriters have good printing quality, they have the disadvantage of slow printing speed. Particularly recently, Japanese word processors have become popular, and wire tod printers are often used as printers for terminals. However, since the printing quality is poor, there is a demand for improvement, and various methods have been proposed.

An example of this is the type drum system, which will be described in detail below with reference to FIGS. 1, 2, and 3. In the figure, reference numeral 1 denotes a platen, which is rotated in the direction of arrow θ by a platen driving motor 2. As shown in FIG. The platen 1 is supported by a platen support frame 3, and includes a rack gear 4, a pinion gear 5,
The platen slides in the direction of arrow Z by the motor 6 for sliding the platen.

7 is a type paper attached to the platen 1. 8 is a rotatable type drum to which type 20 is attached.

The type drum 8 is rotated in the direction of arrow Y by a drum drive motor 9. 1o is a drum support frame and type drum 8
is supported and slid in the direction of arrow X by a belt 11, pulley 12, and drum sliding motor 13. A solenoid 14 is arranged within the type drum 8 and fixed to a solenoid support frame 15. An ink ribbon 16 is wound by reels 17, 18 and a ribbon winding motor 19.

Next, its operation will be explained. The type paper 7 is moved in the direction of arrow θ by the platen drive motor 2 or by the platen sliding motor 6.
is sent in the direction of arrow Z. At the same time, the type drum 8 is rotated in the direction of arrow Y by the drum drive motor 9.
The drum is slid in the direction of arrow X by the drum sliding motor 13 to select a predetermined type 20 and is sent to a predetermined printing position. Furthermore, a new ink surface is prepared for the ink ribbon 16 as well. Then, the plunger 21 of the solenoid 14 moves in the direction of arrow P to print the type 20 on the type paper 7 via the ink ribbon 16. The size of the type drum 8 is determined by the number of type characters, but generally in the case of Japanese, JIS
3418 characters up to the first level.

Up to the second level, there are 6,802 characters, which is a large number of characters. Therefore, Japanese tights writers accommodate 22o3 characters as standard, and process the other characters as non-standard characters. Also, the percentage of type used in newspapers is 10'O○ characters, which accounts for approximately 90%.

Approximately 98.8% for 2000 characters, approximately 99.8 for 3000 characters
It is said to be a person in charge, but in general document creation, it is 200
It is sufficient to accommodate 0 to 3000 characters.

However, if 2000-3000 characters are attached to the outer periphery of a type drum, the size becomes quite large. For example, reducing the diameter of the type drum increases the length in the longitudinal direction and increases the width of the product. Also, if the longitudinal direction is made smaller, the diameter becomes larger and the moment of inertia increases significantly, causing problems in terms of positioning accuracy and time required.1. The drive system and control system will also become larger. Furthermore, it is troublesome to attach individual type characters, and the cost is also high. As mentioned above, the type drum system has various problems.

OBJECTS OF THE INVENTION The present invention eliminates these conventional drawbacks and provides a printing device in which the construction of the type drum is lightweight and compact, and the printing speed is further improved.

Structure of the Invention In the printing device of the present invention, a type bar having convex type characters formed at arbitrary intervals on the outer periphery of a frame having a polygonal or circular cross section is arranged on the outer periphery of a type drum, and the type bar and the type drum are rotated respectively. means for printing the selected type;
A means for driving the type drum in the X-Y direction, a platen section,
To obtain a printing device with improved printing speed by providing a lightweight and compact type drum constituted by an ink ribbon section.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG. 4 and subsequent drawings. 101 is a platen and is driven by a motor 102 with an arrow θ.
Rotate in the direction. 103 is type paper attached to the platen 101. Reference numeral 104 denotes a type drum, and as shown in FIG. 6, which is a sectional view taken along line B-B/ in FIG. 4, ribs 104a are provided at both ends.

1'04b is provided, 1'l-J, rib 104a,
Notches 104a' and 104 are provided on the outer periphery of 104b, respectively.
b'. A cover 105 is attached to one end of the type drum 104. A return arm 106 is attached to the cover 10-5 and is urged in the direction of the top mark A by a shaft 1.07 and a return spring 108. 109 is a type bar with a polygonal cross section, and convex type type 110 is placed on its outer periphery.
are formed integrally or detachably. Furthermore, a plurality of characters 110 are arranged at appropriate intervals in the longitudinal direction of the character bar 109. In the case of an even number of polygons (four sides, hexagons, etc.), recesses 111 for positioning are formed on the type faces at both ends of the type bar 109. Further, a shaft 112 is integrally or fixed to both ends of the type bar 109. A gear 113 is attached to one end of a shaft 112 of the type bar 109, and the tip thereof has a groove 114. The type bar 109 configured as described above is connected to the ribs 104a and 104b of the type drum 104.
Attach the cover 105 to the side opposite to the gear 113. A bearing 1 is attached to one end of the type drum 104 and the gear 116.
15 is slidably fitted and attached by a retaining ring 115'.

A drive pulley 117 is fixed to one end of the bearing 116. The gear 116 meshes with the gear 113 of the type bar 109, and the spring 11 is connected to the groove 114 provided at the tip of the shaft 112 of the gear 113 and the pin 118 attached to the gear 116.
9 is installed. Type drum 104 rep 1.0
4a and 104b each have one hole 10 on the longitudinal line.
4c is opened and a drive bar 120 without type is attached. A gear 12 is provided at one end of the drive bar 120.
1 and a driven pulley 122 are attached.

The driven pulley 122 is connected to the drive pulley 117 by a belt 123. 124 is a frame to which a bearing 125 is attached, and a hollow shaft 126 having a gear portion 126a at one end and a fitting portion 126b at the other end is rotatably attached to the bearing 126. Opening 1 of type drum 104
04d is fitted with the hollow shaft 126 having a sampling means for transmitting the rotation of the hollow shaft 126 to the type drum 104. A gear 126a of the hollow shaft 126 is connected to a pinion gear 129 of a motor 128 fixed to the p frame 124 by a screw 127.
They are biting each other. Further, the motor 13 is attached to the frame 124.
1 is fixed with a screw 130, and the shaft 132 of the motor 131 is supported by a bearing 134 press-fitted into a frame 133 and a bearing 138 press-fitted into a frame 137 attached with a screw 136 via a spacer 135. A pinion gear 139 is fixed in the middle. The pinion gear 139 is connected to a shaft 142 supported by bearings 140, 141 which are also press-fitted into the frames 133, 137.
It meshes with a gear 143 fixed to. Shaft 142 passes through bearing 141 and then into bearing 115. Bearing 11
5 is attached by a threaded portion 142' at the tip of a shaft 142 and a nut 144.

Inside the type drum, a solenoid 14 is mounted on a frame 124.
5 is attached, and a printing hammer 146 is attached to the top of it.
is fixed. Printing/・Imma 146 and solenoid 1
45, a spacer 147 is attached between the two. A spring 148 is connected to a plunger 149 at the bottom of the solenoid 145.
is biased downward.

Reference numeral 160 denotes a table, and a driving boo 9151 and a driven pulley 152 are attached to the side of the table, and a belt 153 is attached thereto. The drive pulley 151 slides on the spline shaft 154 and is rotated by a motor 165. A part of the belt 153 is fixed to the frame 124, and a part of the belt 153 is fixed to the frame 124.
4 is supported by the table 150 via sliding means. Therefore, as the belt 153 moves, it moves in the direction of arrow Y. On another side of the table 150, a drive pulley 156
, a belt 158 attached to a driven pulley 157 is fixed.

, the drive pulley 156 is driven by a motor 159, and the table 150 slides in the direction of arrow X.

160 (I'i ink ribbon with reels 161 and 162
It is wound up by the motor 163.

Next, the operation of this embodiment will be explained. Type paper 1C13 is
It is sent by the motor 102 in the direction of arrow θ to a predetermined printing position. At the same time, the type drum 104 is moved in the direction of arrow Y by motor 156 and in the direction of arrow X by motor 159 to a predetermined printing position. Further, the motor 128 is connected to the hollow shaft 12 with a gear portion 126a by a pinion gear 129.
6 to rotate the type drum 104 in the direction of arrow Z. Thereby, any type bar 109 on the circumference of type drum 104 is selected.

When the motor 131 operates, the pinion gear 139 and the gear 143 rotate, and the driving pulley 117 and the driven pulley 122 also rotate, which rotates the gear 116 that meshes with the gear 121 and rotates the gear 113 of the type bar 109, thereby rotating the type. An arbitrary type surface on the outer periphery of the buff 109 is selected and a predetermined type is sent to the printing position.

The ink ribbon 160 is also wound by a predetermined amount by the motor 163 to prepare a new ink surface.

After that, solenoid 145 prints) and mark 146 as arrow P.
When the protrusion 146a of the printing hammer 146 is stopped in the recess 111 of the printing bar 109, the printing bar 10 is moved in the direction shown in FIG.
9 upward to move the type 110 onto the ink ribbon 160.
It prints on the type paper 103 via the . Type bar 109
moves upwards - returns to the embankment 1. It is urged downward by arm 106 and spring 119, and after printing is completed, the repulsive force is applied to return character bar 109 to a predetermined position, completing printing.

Effects of the Invention As described above, in the present invention, the type bar having a plurality of type surfaces is arranged around the outer periphery of the type drum, so that the entire type drum can be made very compact. Therefore, the moment of inertia due to the rotation of the type drum can be reduced, so that the printing speed of the printing device can be significantly improved.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing a conventional example, Fig. 2 is a partial sectional view showing a conventional example, Fig. 3 is a perspective view of a conventional type type, and Fig. 4 is a perspective view showing an embodiment of the present invention. , FIG. 5 is a perspective view of the type drum of the embodiment, FIG. 6 is a main sectional view of the type drum of the embodiment, FIG. 7 is a side view of the type drum, and FIGS. 8 to 11.
The figure is a sectional view of the printing section. 101...Platen, 1Q3...Type paper, 104...Type drum, 1o9...
・Print bar, 124...Frame, 145...
...Printing solenoid, 146...Printing hammer,
16o... Ink ribbon. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 2 Figure 2 - Figure 3 2θ Figure 4 Figure 5 lad Figure 6 /? 4 Figure 7 13

Claims (1)

[Claims] A type bar formed by forming convex type characters at arbitrary intervals on the outer surface of a rigid rod-shaped body having a polygonal or circular cross section, a tram with the type bars arranged on the outer periphery, and the type bar and the drum. means for rotating each, a frame for supporting the drum, a means for driving the frame in the X-Y direction, a means for printing the type bar, a platen section for attaching type paper, and an ink ribbon section. Printing device configured 0