JPS595437B2 - Japanese typewriter feed pitch adjustment device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a vertical or horizontal feed device for Japanese typewriters that, during printing at a certain feed pitch, feeds at a pitch smaller than the feed pitch, for example, 1 to 2 pitches of the pitch of the main drive gear. When you want to print, move the movable stopper to the required position and print while limiting the feed. When printing is finished, the movable stopper automatically returns to the original position and prints at the determined feed pitch. This relates to the adjustment position of the feed pitch for the purpose of making it possible to continue.

The embodiment shows a case where the adjustment device of the present invention is applied to the vertical feed device of a Japanese typewriter, and the gist of the present invention can be applied to the horizontal feed device as is with simple changes. be.

In the drawing, 1 is a support plate, 2 is a main drive gear loosely attached to a main shaft 7 provided on the support plate, and 3 is a fan-shaped sub-claw for determining the feed pitch. collides with the fixed stopper 4 and meshes with the main drive gear 2 to stop.

5 is a spring for rotating the sub pawl, and 6 is a main shaft 7 provided with a main drive gear 2.
A lever 8 is fixed to one side of the lever, 8 is a feed pawl pivotally connected to one side of the lever 6, 9 is a spring that presses the feed pawl 8 against the tooth surface of the main drive gear 2, 10 is a spring for reciprocating the lever 6, By this backward motion, the feed pawl 8 engages with the main drive gear 2, causing the main drive gear 2 to rotate.

Reference numeral 11 denotes an operating rod whose upper end is connected to the lever 6, and whose lower end is linked to a frame rod 12 that is swung by a well-known key lever or a vertical feed rod (none of which is shown).

Reference numeral 13 denotes a movable stopper, and normally a gear 1 is freely supported on the other surface of the support plate 1 about the shaft 14 of the sub-claw 3.
When the sub-claw 3 is opened, the sub-claw 3 is rotated by the spring 5 and the other side of the sub-claw 3 is brought into contact with the other side of the sub-claw 3. When the printing is completed, the sub pawl 3 meshes with the main drive gear 2 at that position, and is moved back by the spring 10 until the sub pawl 3 abuts against the fixed stopper 4 and stops. The main drive gear 2 is rotated together with the feed pawl 8 of the lever 6.

The amount of rotation of the main drive gear 2 during this period becomes the feed pitch, and the gear 15 is provided with a stop pawl 16, and the main shaft T
A lever 17 is provided with the lever 17 at the center, and one piece of the lever 17 is connected to the shaft of the movable stopper 13 by a connecting rod 18. One side of the lever 17 is made to protrude to the outside and is provided with a knob and a finger piece, and with the finger piece,
The feed pitch number set on the scale plate 19 is indicated, and the lever 17 and the connecting rod 18, which are rotated by the knob, rotate the movable stopper 13, so that the feed pitch corresponding to the indicated scale can be obtained. ing. (However, in the embodiment of the present invention shown in the drawings, the movable stopper is not provided on the gear 15, but in the explanation of the conventional example above, the reference numeral ``13'' was given for convenience.) 20 is , support plate 1
A cam piece 21 is fixed to the main shaft 7 so as to co-move with the lever 6 on the opposite side to where the main drive gear 2 is provided. Reference numeral 21 is a lever that is moved up and down by the cam piece 20, and the other end of this lever 21 is connected to the sub pawl. 3
The cam piece 20 is actuated by the operation of the lever 6, and the mounting shaft 14 is moved forward and backward to perform the meshing and disengaging action between the secondary pawl 3 and the main drive gear 2. Let it happen. 22 is a plurality of intermediate gears interlocked with the main drive gear 2, the final gear 23 of which meshes with the platen gear 24,
The platen is vertically fed, and by sliding a required intermediate gear 22, the platen can be made free or rotated in the opposite direction.

The above configuration is shown in, for example, Japanese Utility Model Publication No. 45-14414 and is well known. In such a vertical feed device or other types of vertical feed devices, in the present invention, a rotary plate 26 having the same shape as the gear 15 for adjusting the feed repitch is loosely provided on the mounting shaft 14 of the sub-claw 3, and its rotation is adjusted. The plate 26 is provided with a movable stopper 13 corresponding to the connection position a of the connection rod 18 connected to the gear 15, and the gear 15 is provided with a movable stopper 13.
An arcuate groove 27 centered on the mounting shaft 14 is provided so as to open on the side opposite to where the rotation plate 26 is provided. The movable stopper 13 is provided protrudingly on the opposite side.

When the abutting pin 28 is at the bottom of the arcuate groove 27, the axis a of the movable stopper 13 is aligned with the connecting position a of the connecting rod 18, and it is returned to the rotating plate 26 so as to maintain that position. Apply spring 36. In other words, this return spring 36
is for urging the rotary plate 26 to return to its original position relative to the gear 15. One end of an actuating piece 29 is loosely supported on the main shaft 7 on which the main drive gear 2 is provided, the other end of this swingable actuating piece 29 is opposed to the abutting pin 28, and the lower part of the actuating piece 29 is a mountain. It is formed in such a shape that it stops when it abuts against the mounting rod 31 of the support piece 30 of the main shaft 7 and other stoppers. The actuating piece 29 is actuated by an operating rod 34 that is pivotally connected to a side frame or other fixed member that supports the platen.

The operating rod 34 is connected to the actuating piece 29 via, for example, a supporting rod 33 and a connecting rod 32 fixed thereto. The supporting rod 33 and the lower end of the connecting rod 32 and the upper end of the connecting rod 32 and the operating piece 29 are pivotally connected by pins. The operating rod 34 is also connected to the frame rod 12 at its tip so that the operating rod 11 can be operated, and is independent of the well-known key lever and vertical feed rod (none of which are shown). The frame rod 12 is actuated in this manner. Therefore, when the operating rod 34 is lowered, the supporting rod 33
The connecting rod 32 is moved upward through the abutting pin 28, causing the operating piece 29 to rotate counterclockwise in FIG. 2, and the rotating plate 26 to rotate clockwise in FIG.

By this operation, the movable stopper 13 on the rotary plate 26 changes the position where it meets the sub pawl 3 to a position where the main drive gear 2 is fed at a small pitch that is less than the normal feed pitch. become. When the operating rod 34 is released from being depressed, both the connecting rod 32 and the rotary plate 26 move back, and the movable stopper 13 also returns to its original position. Note that a restriction pin 35 provided on a suitable fixing member is used to determine the normal position of the operating rod 34 and the lower limit position when it is pressed down. Furthermore, when the knob of the lever 17 is moved according to the scale of the scale plate 19, the gear 15 is rotated together with the rotating plate 26, and the movable stopper 13 is moved to a position that determines the feed pitch corresponding to the scale.

First, the case of printing at a normal feed pitch will be explained. When a well-known key lever (not shown) is pushed down, the frame rod 12 and the operating rod 11 are moved upward, and the lever 6 and the cam piece 2 are moved upward.
0 in the direction of the arrow against the spring 10, and lever 6
The feed pawl 8 is rotated by sliding on the teeth of the main drive gear 2, and rides on the relief piece 25, and the cam piece 20 operates the lever 21 to advance the mounting shaft 14 of the sub pawl 3 to move the sub pawl 3. It is disengaged from the main drive gear 2, is made free and rotated in the direction of the arrow by the spring 5, and stops when its side surface abuts against the movable stopper 13. During this time, the printing mechanism is activated, and the type bar acts on the desired characters to print on the paper wrapped around the platen. When the key lever is released after printing, the lever 21 moves back due to the retraction of the cam piece 20, so the mounting shaft 14 retracts, and the sub-claw 3 engages the main drive gear 2 at that position.
mesh with. At the same time, the lever 6 is rotated in the opposite direction by the spring 10, so the feed pawl 8 separates from the relief piece 25 and engages between the teeth of the main drive gear 2, and the sub pawl 3 collides with the fixed stopper 4. The main drive gear 2 is rotated until it stops. This rotation of the main drive gear 2 rotates the platen gear 24 via the intermediate gears 22 and 23, and provides longitudinal feed to the platen. The amount of rotation of the main drive gear 2 corresponding to the movement of the sub pawl 3 is indicated on a scale, and the feed pitch corresponds to the scale that indicates this, and by repeating the operation by operating this key lever,
Printing is performed at the required feed pitch. In addition, idle feeding is performed in the same manner as described above by operation of a well-known vertical feed rod (not shown). The characters to be printed often include period marks, other symbols, small foreign characters, etc., and if these characters are printed at the same feed pitch, the time between prints will lengthen and become unsightly. , lever 17 for adjusting the feed repitch
Although it is possible to move the movable stopper 13 by operating the movable stopper 13 or to print with the platen free, this method requires a lot of adjustment and reduces printing efficiency.

In this invention, when printing a period or a symbol in the middle of printing at a certain feeding repitch, small pitch feeding corresponding to these can be performed by only operating the operating rod 34.

In other words, if you want to print a period or a symbol in the middle of printing, press down on the operating rod 34 and the connecting rod 3 will move through the support rod 33.
2 is moved upward, causing the actuating piece 29 to swing.

The abutting pin 28 is pushed up by the operation of the actuating piece 29,
The rotating plate 26 is rotated, thereby moving the movable stopper 13. Further, the operating rod 34 simultaneously operates the frame rod 12 and the operating rod 11, and operates the lever 6 and the cam piece 20 in the same manner as described above, so that the sub-claw 3 rotates and the movable stopper is moved. It collides with 13 and stops. When the operating rod 34 is released, the sub pawl 3 engages with the main drive gear 2 at that position, and the feed pawl 8 rotates the main drive gear 2 until the sub pawl 3 abuts the fixed stopper 4, and the rotation stops. The platen gear 24 is rotated to feed the platen, and at the same time, the supporting rod 33, the connecting rod 32, and the actuating piece 29 also move back, so the rotating plate 26 also moves back by the spring 36, and the pin 28 moves back into the arcuate groove 27. The movable stopper 13 then returns to its original position. In this way, it is possible to perform small pitch feeding by pressing down on the operating rod 34, or to continue printing at the original feeding pitch by pressing down on the key lever. As described above, in the present invention, when it is desired to feed at a small pitch in order to print period marks, symbols, etc. in the middle of printing, only the operation lever 34 is operated, and the unsightly printing of the period marks, symbols, etc. is prolonged. Moreover, it is designed to be able to reliably print in an attractive and efficient manner with simple operations.

[Brief explanation of the drawing]

The drawings show an embodiment in which the device according to the present invention is applied to a vertical feed device, in which Fig. 1 is a front view, Fig. 2 is a rear view, Fig. 3 is a cross-sectional view taken along Fig. 2-, and Fig. 4. , and FIG. 5 are perspective views showing a rotating plate and a gear for changing and adjusting the feed lip pitch, respectively. 1 is the base plate, 2 is the main drive gear, 3 is the sub pawl, 4 is the stopper, 5
6 is a lever for fixing the main drive gear 2 to one side of the main shaft 7, 8 is a feed pawl, 9 is a tension spring for the feed pawl 8, 10 is a spring for reciprocating the lever 6, 11 12 is a frame rod connected to the lever 6, 13 is a movable stopper, 14 is a mounting shaft for the sub-claw 3, 15
1 is a gear for adjusting the feed pitch, 16 is a stop claw thereof, 17 is a lever for adjusting the feed pitch change, 18 is a connecting rod connecting the lever 17 and the gear 16, 19 is a scale plate, 20 is a cam piece, 21 2 is a lever that operates the mounting shaft 14 of the sub-jaw 3;
2 is an intermediate gear, 23 is a terminal gear thereof, 24 is a platen gear, 25 is a relief piece, 26 is a rotating plate provided with a movable stopper 13, 27 is an arcuate groove provided in the gear 15, 2b is a rotating plate 2
6 is an abutment pin installed vertically and fitted into the arcuate groove 27; 29 is an actuating piece; 30 is a branch piece; 31 is a mounting rod thereof; 32 is a connecting rod whose upper end is connected to the actuating piece 29; The lower end of the support rod is connected to the operating rod 34, 35 is an operation limiting pin of the operating rod 34, and 36 is a spring.

Claims (1)

[Claims] 1. In a Japanese typewriter feeding device, the following A and B are provided.
A feed pitch adjustment device for a Japanese typewriter having the configuration requirements of , C, D and E. A. A rotary plate 26 provided with a movable stopper 13 that determines the feed pitch is rotatably attached to the gear 15 that changes and adjusts the feed pitch.B. C. A return spring 36 is provided which is biased to return to the position; C. A return spring 36 is provided that is swingable opposite the rotary plate 26 in order to contact the rotary plate 26 and rotate it. A piece 29 is provided. D. An operating rod 34 for small feed pitch is connected to the operating piece 29 via a connecting rod 32 in order to swing it. E. The operating rod 34 is a key lever. Or, it can be linked to the frame rod 12 independently of the operation of the feed rod.