JPH018369Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a vertical feed device for a Japanese typewriter, and in particular, in addition to a predetermined feed pitch, a feed pitch smaller than this predetermined feed pitch can be arbitrarily predetermined. The present invention relates to a vertical feed device that allows easy selection of small feed pitches.

Conventionally, in the vertical feed device of a Japanese typewriter, typing is performed by arbitrarily selecting a feed pitch from among predetermined feed pitches that are an integral multiple of the minimum pitch. During typing, for example, print by setting the feed pitch to half the previous pitch and printing with a space of half the feed pitch of one character between words. When you want to type, you must operate the feed pitch selection knob to switch to a scale that is half the pitch of the previous feed pitch, and then return the knob to its original position after typing. The operation was complicated.

Also, some conventional Japanese typewriters automatically set the feed pitch to be half the feed pitch at the same time as the feed pitch is set, but for example, the feed pitch may be set to one-third of the previous value or other settings. When switching to an arbitrary feed pitch, the feed pitch operation knob must be switched, which is cumbersome to operate.

In addition to the predetermined feed pitch, there were also machines that allowed you to set an arbitrary feed pitch that was smaller than the predetermined feed pitch, but when changing this small feed pitch, it was necessary to replace parts, etc. As a result, operation during typing was extremely difficult.

This invention was made in order to eliminate the drawbacks of the conventional vertical feed device of Japanese typewriters as mentioned above. To provide a vertical feed device for a Japanese typewriter which allows the feed pitch to be arbitrarily and easily selected.

This invention will be explained below based on embodiments shown in the drawings.

FIG. 1 is a configuration diagram showing the main parts of the vertical feeding mechanism of the platen, in which a main gear 2 is connected to a support plate (not shown in FIG.
is rotatably attached to the shaft 1, and a rotating frame 4 integral with a gear 3 is pivotably supported on the shaft 1. A feed pawl 5 is attached to the tip of the rotating frame 4 so that its base end can swing freely, and the feed pawl 5 is pushed in the direction of meshing with the main gear 2 by a spring (not shown). At the same time, when it is rotated in the direction of arrow A from the samurai position shown by the solid line in Figure 1, the meshing with main gear 2 is released and it is rotated in the opposite direction to arrow A. In some cases, it meshes with the main gear 2 to rotate the main gear 2 by the amount of rotation of the rotation frame 4.

A gear 6 which is pivotally supported on the support plate is engaged with the gear 3 of the rotating frame 4, and a lever 8 is formed on the tip edge of the lever 8 which is arranged to be swingable about a shaft 7. Sector gear 9 is meshed. A push-up lever 10 that interlocks with a type bar (not shown) is connected to the other end of the lever 8. When the push-up lever 10 is pushed up by the operation of the type bar, the lever 8 rotates in the direction of arrow B. The rotating frame 4 is rotated in the direction of arrow A via the gear 6. Also, the lever 8 is moved by the arrow B by the spring 11.
is biased in the opposite direction.

Further, the operating frame rod 12 (operating frame rod 12 in FIG. 3), which will be explained after being pivotally supported on the support plate, has a rotating piece 1.
3 is pivoted so that it is coaxial with the rotating frame 4, and in the standby position shown by the solid line in FIG.
The tip end comes into contact with a stopper 12b formed on the bent portion 12a of the operating frame rod 12, and is prevented from rotating in the direction opposite to arrow A. The pawl 16 meshes with the main gear 2. It is biased in the direction of arrow A by a spring 17.

In FIG. 2, a feed pitch adjuster 18 (see FIG. 6) is pivotally supported coaxially with the main gear 2 on a support plate (not shown) (support plate 21 in FIG. 3), and an adjustment knob (not shown) The adjustment knob 70) shown in FIG. 6 is adapted to swing around the shaft 1 through a gear device (not shown), and the abutment surface 19 formed at one end of this adjuster 18 is rotated as shown in FIG. It engages with the rotating piece 13 that has been rotated in the direction of arrow A against the spring 17, and the amount of rotation of the rotating piece 13 is regulated between this abutment surface 19 and the stopper 12b. ing.

In FIG. 3, an operating frame rod 12 is pivotally supported on a support plate 21 by a shaft 22, and a roller 14 and a stop pawl 15 are attached to an upper bent portion 12a of the operating frame rod 12.
is installed. The operating frame rod 12 is urged in the direction of arrow C by a spring (not shown), and the stop pawl 15 is spaced apart from the main gear 2 at the standby position shown, and is pivotally supported by the operating frame rod 12. The auxiliary pawl 16 of the rotating piece 13 meshes with the main gear 2.

Further, on the support plate 31 fixed to the operating frame rod 12, an undulating plate 32 is pivotally supported by a shaft 33 and is biased in the direction of arrow D by a spring 34. It is locked with a stopper 35.

In FIG. 4, a conductive plate 42 is pivotally supported on the undulating plate 32 by a shaft 41, and is biased in the direction of arrow E in the figure by a spring (not shown). Conductive plate 4
One end of a link 43 is pivotally supported at one end of 2,
The other end of the link 43 is pivotally supported by one end of an adjustment plate 44 that is pivotally supported by the undulation plate 32 at a position coaxial with the axis of the main gear 2 . The other end of the conductive plate 42 is pressed by a spring to an adjustment pin 69 formed at one end of a small pitch feed lever (a small pitch feed lever 63 in FIG. 7), which will be described later. Furthermore, an adjustment piece 45 for regulating the rotation of the rotation piece 13 is formed at the tip of the adjustment plate 44 .

In FIG. 5, a rotary lever 51 is pivotally supported on the support plate 12 coaxially with the main gear 2.
A cam protruding piece 52 is fixed to the tip of 1.
Furthermore, the other end of a link 53 whose one end is pivotally supported by the lever 8 is pivotally supported at the other end of the rotating lever 51.
When the push-up rod 10 is pushed up and the lever 8 is rotated in the direction of arrow B, the pivot lever 51 is rotated in the opposite direction to arrow A in the figure via the link 53, and the cam protrusion 52 is activated. By coming into contact with the roller 14 attached to the frame rod 12 and pressing the roller 14 with the cam surface 54, the operating frame rod 12 is moved in the direction indicated by the arrow C in FIG.
It is designed to rotate in the opposite direction.

In FIG. 6 or 7, the arm 61 fixed to the support plate 21 includes a pitch adjustment lever support arm 6.
2 is fixed at its proximal end, and this support arm 62
The pitch adjustment lever 63 has its base end attached to the shaft 64.
It is supported by Pitch adjustment lever 63
An elastic piece 65 has one end fixed to the side surface of the knob, and an engaging protrusion 66 formed on the elastic piece 65
is engaged with a groove 68 of a positioning plate 67 attached to the support arm 62, thereby positioning the pitch adjustment lever 63. An engagement pin 69 is protruded from the end opposite to the knob side of the pitch adjustment lever 63, and this engagement pin 69 is brought into contact with the side surface of the distal end of the conduction plate 42. The conduction plate 42 is pressed against the engagement pin 69 by the spring.
is adapted to swing about the shaft 41 as the pitch adjustment lever 63 swings.

In FIG. 8, a stop plate 72 is pivotally supported on the arm 61 by a shaft 71, and is rotatable in a plane parallel to the main gear 2, and further supported by a spring (not shown) in the direction of arrow F in the figure. is energized by An undulation plate control piece 73 is formed at the tip of the stop plate 72, and when the stop plate 72 is rotated in the direction opposite to the arrow F, it engages with the side surface of one end of the undulation plate 32, and the operating frame rod 12 is activated. When rotating in the direction opposite to arrow C (see FIG. 3), the undulating plate 32 is prevented from rotating together with the operating frame rod 12. The other end of the stop plate 72 is engaged with an actuation piece 74 connected to a small pitch feed lever (not shown), and when the small pitch feed lever is actuated, the actuation piece 74 rotates in the direction of arrow G in the figure. As a result, the stop plate 72 is rotated in the direction opposite to the arrow F.

Next, the operation of the vertical feed device of the Japanese typewriter will be explained.

In FIG. 1, when the push-up rod 10 connected to the type bar is pushed up due to the operation of the type bar (not shown), the rotating frame 4 moves through the bar 8, the sector gear 9, the gear 6, and the gear 3 as shown in the arrow. The feed pawl 5 is rotated in the direction of A, and the feed pawl 5 is rotated without rotation of the main gear 2, and rides on the stopper 20 disposed near the outer periphery of the main gear, resulting in a state of meshing with the main gear 2. will be canceled.

At the same time, in FIG. 5, as the lever 8 rotates, the cam protrusion 52 is rotated in the direction opposite to the arrow A through the link 53 and the rotary lever 51, and the cam surface 54 causes the roller 14 to be rotated. By moving the operating frame rod 12 in the direction opposite to the arrow C in FIG. 3, the operating frame rod 12 is moved from the standby state shown in FIG.
Rotate it in the opposite direction. As a result, as shown in FIG. 9, the auxiliary pawl 16 and the main gear 2 become out of mesh.
At the same time, the stop pawl 15 meshes with the main gear 2. When the secondary pawl 16 and the main gear 2 are out of mesh, the rotating piece 1
3 is rotated in the direction of arrow A by the biasing force of the spring 17 until it collides with the abutment piece 19 of the adjuster 18, as shown in FIG.

When the push-up lever 10 is lowered by releasing the type bar, the lever 8 is rotated in the direction opposite to the arrow B in FIG. It is rotated and returns to its original position. During this backward movement of the rotation frame 4, the feed pawl 5 meshes with the main gear 2 to rotate the main gear 2,
The platen is vertically fed by a predetermined pitch via a gear device (not shown) that meshes with the main gear 2.

At this time, as the lever 8 moves back, the rotating lever 51
rotates in the direction of arrow A (see FIG. 5), the cam protrusion 52 and roller 14 are separated, and the operating frame rod 12 rotates in the direction of arrow C (see FIG. 3), causing the stop claw 15 to rotate.
At the same time as the auxiliary pawl 16 separates from the main gear 2, it meshes with the main gear 2, and is rotated as the main gear 2 rotates until it engages with the stopper 12b.
By preventing further rotation of the rotation piece 13, further rotation of the main gear 2 is restricted.

Next, to explain the case of adjusting the feed pitch with reference to FIGS. 2 and 6, if the adjustment knob 70 is turned to match the predetermined feed pitch scale, the adjuster 18 will be centered around the shaft 1 via a gear device (not shown). The feeding pitch is set by regulating the amount of rotation of the rotating piece 13 between the abutting piece 19 and the stopper 12b.

Next, when setting the small feed pitch, rotate the pitch adjustment lever 63 around the shaft 64 (the seventh
), the engaging protrusion 66 is inserted into the groove 6 of the positioning plate 67.
8 and set it at any position. At this time, the conductive plate 42 pressed by the engagement pin 69 is rotated about the shaft 41 as the pitch adjustment lever 63 is rotated, and the rotation of the conductive plate 42 causes the link 4
The adjustment plate 44 is rotated about the shaft 64 via the shaft 3 .

When typing normally using the type bar,
As shown in FIG. 9, the undulating plate 32 is biased by a spring and rotated together with the operating frame rod 12 in the direction opposite to the arrow C while being engaged with the stopper 35, and as a result, the adjusting plate 44 is moved in the opposite direction to the arrow C. When the adjusting piece 45 is rotated in the direction shown in FIG. Therefore, as described above, as the rotating frame 4 moves back, the adjuster 18
The main gear 2 is rotated by the feed pitch set by .

Next, when performing a small feed of the platen, when the small pitch feed lever is activated, the push-up rod 10 connected to the small pitch feed lever is activated, similar to normal typing.
is pushed up, and the operating frame rod 12 is rotated in the direction opposite to arrow C. At this time, the actuating piece 74
Rotate in the direction opposite to arrow F, and lift the undulation plate control piece 7.
3 engages with the undulating plate 32 to prevent the undulating plate 32 from rotating together with the operating frame rod 12. Therefore, the 10th
As shown in the figure, the adjustment plate 44 is held in the standby position, and as a result, the adjustment piece 45 enters the rotation area of the rotation piece 13, and the amount of rotation of the rotation piece 13 is controlled by the adjustment piece 45.
and the stopper 12b. Then, when the small pitch feed lever is released, the operating frame rod 12 rotates in the direction of arrow C and returns to its original position.
6 meshes with the main gear 2 at the engagement position with the adjustment piece 45, and the return movement of the rotation frame 13 causes the main gear 2 to rotate by the amount of rotation of the rotation piece 13 between the adjustment piece 45 and the stopper 12b. The platen is then rotated to feed the platen.

For example, if the feed pitch is set to 10 pitches using the knob 20, and the small feed pitch is set to 5 pitches using the pitch adjustment lever 63, the feed pitch can be adjusted by operating the small pitch feed lever during so-called separation writing. Half-feeding can be done easily.

As described above, this device allows the selection of the small feed pitch to be performed independently of the selection of the feed pitch, and the small feed pitch can be selected by operating the small pitch adjustment lever. Since you can easily select the pitch, you can easily change the small feed pitch during typing work. You can type smoothly without the trouble of resetting the feed pitch, and you can also set the small feed pitch in advance without having to replace parts like in the past. It has various excellent effects and is hassle-free.

[Brief explanation of the drawing]

Figure 1 is a configuration diagram showing the main parts of the platen vertical feed mechanism, Figure 2 is an explanatory diagram showing the configuration of the feed pitch adjuster, Figure 3 is a front view of the vertical feed mechanism, and Figure 4 is the small feed pitch. Fig. 5 is a block diagram showing the mechanism for operating the cam protrusion, Fig. 6 is a top view of the vertical feed mechanism, Fig. 7 is a block diagram showing the mechanism for setting the cam protrusion.
The figure is a block diagram showing a mechanism for setting a small feed pitch, FIG. 8 is a block diagram showing a mechanism for operating a small feed pitch mechanism, and FIG. 9 is an explanatory diagram showing a state in the case of normal feed. FIG. 10 is an explanatory diagram showing the state in the case of small feed. 2... Main gear, 12b... Stopper, 13...
Rotating piece, 16... subclaw, 18... feed pitch adjuster, 19... abutment piece, 42... conduction plate, 43...
Link, 44...Adjustment plate, 45...Adjustment piece, 63
...Pitch adjustment lever, 69...Engagement pin.

Claims (1)

[Scope of utility model registration request] The rotary piece is supported almost coaxially with the central axis of the main gear and has a pawl, and an adjusting member for adjusting the feed pitch. When the pawl rotates while being separated from the main gear between the mating surface and the vertical feed lever is released, the pawl engages with the main gear and the rotating piece rotates between the mating surface of the adjustment member and the stopper. By rotating the main gear together with the main gear, the main gear rotates by the set feed pitch, and during operation, the rotating piece is rotated by the rotating small pitch with the pawl separated from the main gear. It comprises a feed lever, and an adjustment plate that is coaxially supported with the central axis of the main gear and has an adjustment piece, and when the small pitch feed lever is operated, the adjustment piece contacts the stopper and the abutment surface of the adjustment member. The rotary piece enters a rotation area of the rotary piece between the stopper and the adjustment piece, and the rotary piece rotates between the stopper and the adjustment piece with the pawl separated from the main gear,
When the small pitch feed lever is released, the pawl engages with the main gear and the rotating piece rotates between the adjustment piece and the stopper together with the main gear, causing the main gear to rotate by the set small feed pitch. In the vertical feed device of a Japanese typewriter, the intermediate portion is coaxially supported with the adjusting plate 44, and can be positioned at any position. A pitch adjustment lever 63 on which a matching pin 69 is erected is pivoted at the middle part, one end engages with the engagement pin 69, and the other end is connected to the adjustment plate 44 via a link 43. A conductive plate 42,
Japanese type, characterized in that by rotating the pitch adjustment lever 63, the conduction plate 42 is rotated via the engagement pin 69, and the adjustment plate 44 is rotated via the link 43. Vertical feed device for lighter.