JPS60105580A - Printing ribbon feeder of typewriter - Google Patents

Abstract

PURPOSE:To permit simplification of construction and to make the quantity of a ribbon to be fed reliably uniform by connecting the motor shaft of a stepping motor, the shaft of a ribbon feeder roller and the shaft of a reel for winding the ribbon by a rotation transmission device. CONSTITUTION:When a printing is done, a stepping motor 34 is actuated and according to the pulse numbers the shaft 34a of the motor turns as much as predetermined angle and a power is transmitted to a rubber roll through pulleys 42, 46 and a shaft 32a via a belt 45; through pulleys 47, 48 and a reel shaft 30a via belt 49. Thus, a ribbon is being fed and at the same time it is wound by a ribbon winding reel. When it is necessary to suspend ribbon feeding, for example, in case of changing type to a larger one, a switch is pushed to send a certain pulse to the stepping motor 34 and the rubber roll is turned in a above stated manner, winding the ribbon corresponding to the size of the type to be used. Thus, the transmission mechanism may be constituted with belts and pulleys alone, resulting in simplification of the construction and a reliably uniform quantity of ribbon feeding.

Description

DETAILED DESCRIPTION OF THE INVENTION FIELD OF INDUSTRIAL APPLICATION The present invention relates to a printing ribbon feeding device for typewriters that feeds printing ribbons for typewriters under constant suspension.

Conventional Technique Cup 1 As shown in FIG. 1, the ribbon supply reel 1 and the ribbon winding reel 2 on which the printing ribbon 1 is wound have a ribbon through hole 3. Bong guide 41 A plurality of rotatable guide rollers 5 and rubber rollers 6. Each time a character is typed, a certain amount of glue ribbon T is automatically wound up by the ribbon winding reel 2 and then connected to another unprinted ribbon. The following characters are printed in the T section.

As shown in FIGS. 2, 3, and 4, a conventional typewriter ribbon feeding device for printing has a long arc-shaped notch 9 in a part of a substrate 8 constituting the base body. A reel shaft 10 fitted into the notch 9 is provided on the upper surface 8a side.
Ribbon take-up reel 2 fitted with ribbon for printing -
A plurality of rotatable guide rollers 11 for guiding the ribbon T to the ribbon take-up reel 2, and rubber rollers 1 pressed against each other to maintain and feed the ribbon T without loosening it.
2 and 13, a device 15 for adjusting the ribbon feed amount of the solenoid 14, which is a driving device for rotating the ribbon take-up reel 2 by a certain amount, is disposed at a predetermined position, respectively; On the lower surface 8b side, a ratchet Yamanaka 16 and a first pulley 19 are installed integrally with the shaft 13a of the solenoid 14 and the rubber 11-R 13. Said Raji], Tsu:~
A pawl 16a that fits into the gear 16 and a pawl holding piece 18 that holds the stopper 17 are rotatably fixed to the shaft. A 21st pulley 21 connected to the first pulley 19 is integrally attached to the reel shaft 10 via a spring belt 20, and the solenoid 14 and the electric image top piece 18 are connected to the shaft 22.
They are connected by a long rod 22 that can rotate around a.
Every time a character is typed on a typewriter, the driving device Tsurenote 14 is operated, and the operating rod 22 and the electric image 1 are activated.
The ratchet gear 16 rotates through an angle of 51° 118, and the first pulley 19, which is integral with the respective legs 13a, also rotates.
1-921 rotates, and the reel shaft 1 of the 21st-reel 21 rotates.
The ribbon take-up reel 2, which rotates integrally with the ribbon T, also rotates by a certain amount, and the ribbon T is wound up. The adjusting device 15 for adjusting the ribbon feeding is operated by rotating an adjusting screw 24 integrated with an adjusting knob 23. Also, when it is necessary to feed the ribbon idly, the hook part 25 is turned. The operating rod 26 is rotated around the shaft 26a by operating the operating rod 26 with a finger, and the hook portion 25 moves the ribbon winding reel 2 to the vicinity of the entrance of the notch 9, and the ribbon winding is performed directly by hand. Taking reel 2 was rotating.

Therefore, the structure is complex and requires many parts.
The feeding amount of the ribbon T also varied widely.

OBJECTS OF THE INVENTION It is an object of the present invention to provide a typewriter printing ribbon winding device which eliminates the above-mentioned drawbacks, has a simple #iX structure, reduces the number of parts, and has a constant ribbon feed amount. .

Composition of the Invention The printing ribbon feeding device for a typewriter of the present invention includes a ribbon feeding roller on a base body, a ribbon winding reel capable of rotating D1 at a time for winding printing glue, and the ribbon feeding Ll- A drive tool that rotates a part of the ribbon winder and ribbon winder.
? step motors, and the motor shafts of the step motors and the reel shafts of the ribbon feeder and ribbon take-up reel are connected by a rotation transmission device. It is something that you have.

Embodiments Hereinafter, embodiments of the present invention will be explained in detail based on the drawings. In FIGS. 5, 6 and 7, 27 is a metal flat plate, J is a substrate constituting 84 bodies. A long arc-shaped notch 28 is provided on the - side, and a lower surface 2 is provided on the other side.
71) A bent portion 29 is provided which is bent one degree at right angles to the side. On the upper surface 27a side, there is a J which rotates integrally with the reel shaft 30a located at the end of the notch 2B.
, a ribbon winding reel 30 for winding up the fitted printing glue ribbon T, a plurality of rotatable guide rollers 31Fl, 3'll+ that guide and cover the ribbon 1',
31'c, 31d 1. Two rubber rollers 32 and 33 that serve as ribbon feeding rollers that come into pressure contact with each other, a step motor 34 that is a drive device for rotating the storage ribbon take-up reel 3o at a constant angle, and a roller under the ribbon. Switches 35 for idle feeding are provided at predetermined positions.

36 is a support rod for the rubber roller 33, one end of which is connected to a branch of the board 27 via a spring 37, and the part near the other end is a guide roller 31a attached to the board 27.
The rubber roller 33 is mounted near the center in the longitudinal direction, and the rubber roller 33 is pressed against the rubber roller 32 by the spring 37. The other end is a suppressing part 36a, and by pressing this suppressing part 36a with a finger, the support rod 36 rotates against the spring 37, and the rubber rollers 32 and 33 are rotated.
Separate from.

Reference numeral 38 denotes a tension arm, one end of which is rotatably attached to the upper surface 27a side of the substrate 27 by a screw shaft 39, and the other end of which is a guide roller 31 that holds the ribbon T in tension.
b is provided, and a spring 40 urges the front i++4 position arm 38 to rotate in four directions counterclockwise about the screw shaft 39.

41 is a removable plate to which the part 34 is attached;
It is mounted on the downward 27b side of the board 27 with screws, etc., and has a round hole 41a in the medium heat, and an Of which protrudes from the round hole 41a.
fff Desp motor 34 - 1. on the motor shaft 34a. An 11th L 42 is attached integrally to the L.

43 is a reel shaft mounting plate to the right of the guide hole/13a;
One end is attached to a shaft 32a coaxial with the rubber roller 32,
The reel shaft 30a of the ribbon winding reel 3o is at the other end S!
The reel shaft 30a is attached to the reel shaft holder (J-root 43), and the reel shaft 30a is attached to the reel shaft holder (J-root 43).

44b, and the guide hole 43a is guided by a locking screw so that the reel 3o for loading the reel moves along the C notch 28 with the center of the shaft 32a as an axis. The reel shaft holding plate 43 is rotatable.

/15 is a first bell I for transmission, which is attached to the first pulley 42 and the shaft 32a, is mounted between the second pulley 46, and is connected to a third pulley 47 which is integral with the second pulley 46. A second belt 49 is mounted on a fourth pulley 48 that is integrally fixed to the shaft 30a.

Reference numeral 50 denotes a holding plate, which is fitted onto the tip of the reel shaft 30a on the lower surface 27b side and screwed to the base plate 27 via a spacer.

Reference numeral 51 designates an operating rod, one end of which is pulled toward the lower surface 27b of the board 27 by a coil spring 52, is attached to the board 27 by a shaft 51a, and is provided with an engaging portion 53 with the portion 51c as the base end. Near the center is the reel shaft 30
A contact portion 54 that contacts the operating rod 51a is provided, and the operating rod 51a
By operating the other end with a finger, the engaging portion 53 is provided so that the triangular plate 44 is attached so that it engages with the bolt 44a and the ribbon take-up reel 30 moves along the arc-shaped notch 28. There is.

To explain the operation of this embodiment of the present invention, when characters are printed by a typewriter, the two-tube motor 34, which is a drive device, operates, and the shaft 34a partially rotates by a certain angle in accordance with the number of pulses. The motor'full 34
The first bell 1- for transmission from the 17th-ri 42 integrated with a.
45, the second pulley 46 rotates, and the third pulley 47, which is attached to the shaft 32a integral with the second pulley 46, similarly rotates, and the fourth pulley 48 rotates via the second belt 49.
The rotation of the motor shaft 34a is transmitted to the 41st
The reel shaft 30a rotates together with the reel shaft 8. Therefore, the rubber [1-ru 32 rotates at a certain angle to feed the ribbon of equivalent h1]'' which is integrated with the shaft 32a, and at the same time, the ribbon take-up reel 30 winds up the ribbon - held between the guide wheels 32 and 33;
- La 3 lb is placed in a tensioned state and is reliably guided along with the other guides 31a, 31c, 31cl.

Then, when it becomes necessary to feed the ribbon ``-'' in order to make the type larger in the middle, etc., by pressing the switch 35 and sending a constant pulse to the step motor 34, the same operation as described above can be performed.
The motor shaft 34a rotates, and the first pulley 42. 1st bell 1
~45. Second pulley 46° shaft 32a, third pulley 47.
2nd belt 49. The rubber roll 32 and the take-up reel 30 are rotated by the fourth pulley 48, reel shaft 308, etc., and the ribbon T corresponding to the large type is wound up.

The amount of winding of the ribbon T can be easily determined by changing the number of pulses applied to the step motor 34.

In the embodiment described above, the rotation transmission device includes the first pulley 42. First belt 45. 2nd pulley 46, 31st pulley 47. Although the second belt 49 and fourth pulley 48 are used, it goes without saying that other transmission devices can be used.

Effects of the Invention As described above, according to the present invention, compared to the conventional printing ribbon feeding device that uses a solenoid as the ribbon winding drive device, the transmission I side can only be a pulley and a belt. Therefore, the structure is simple and the number of parts can be reduced, and since the step motor reliably rotates at a constant angle, the ribbon feeding and hanging 411 can be done at a constant rate.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing the entire printing ribbon device of a typewriter, Fig. 2 is a plan view of the entire conventional printing ribbon feeding device, Fig. 3 is a front view of the same, and Fig. 4 The figure is the same”:
5 is a plan view of the entire printing ribbon feeding device according to the embodiment of the present invention, FIG. 6 is a front view of the same, and FIG. 7 is a bottom view of the same. 1... Ribbon supply reel, 2... Ribbon take-up reel, 3... Ribbon thread Ll, 4... Ribbon guide, 5... Guide 1.1-L, 6, 7...Rubber roller, 8...Substrate, 8a...''-face, 8b...Bottom surface, 9...Notch, 10...Reel shaft, 11...Guide roller, 12° 13...Rubber roller, 13a.
...Shaft, 14...Solenoid, 1ri...Adjustment device bY
f, 16...Gear, 16a...Claw, 17...Stopper-118...Connection piece, 19...11th-ri, 2
0...Spring belt, 21...21st-ri, 2
2... 1 is attached, 22a... Shaft, 23... Adjustment knob, 24... Adjustment screw, 25... Hook is part, 26...
...Operation rod, 27... Board, 27a... Top surface, 27
b... Lower surface, 28... Notch, 29... Bent portion, 30... Ribbon winding reel, 30 a... Reel shaft, 31a, 31b. 31C, 31d...Guide roller, 32.33...
Rubber roller, 32a... shaft, 34, step motor, 34a... motor shaft, 35... switch, 36...
...Support rod, 36a...Press portion, 37...Spring, 38...Tension arm, 39...Screw shaft,
40... Spring, 41... Mounting plate, 41a... Round hole, 42... First pulley, 43... Reel shaft mounting plate,
43a... Guide hole, 44... Triangular plate, 44a, 4
4b...Mounting with bolts, 45...First belt, 46
...Second pulley, 47...31st pulley, 48...
4th pulley, 49...2nd belt, 50...presser plate, 51...operating rod, 51a...shaft, 52...coil spring, 53...engaging portion, 54...・Abutment part,
■...Ribbon.

Claims (1)

[Claims] The base includes one ribbon feeder, one ribbon winder, etc.
In the printing ribbon feeding device for a typewriter, which is equipped with the ribbon feeding roller and the driving device for rotating the ribbon take-up reel, a C-1 tube motor is used as the driving device, and the steps described above are partially performed. [-A ribbon feeding device for printing on a typewriter, characterized in that the reel shaft of the ribbon feeding roller and the ribbon winding reel is connected to a rotation transmission device.