JPS5910915B2 - Pad device for Japanese typewriters - Google Patents

Description

[Detailed Description of the Invention] This invention prevents the type pushed up to fit into the support tube of the type bar of a Japanese typewriter from jumping up beyond the position where the groove of the type and the piece match. The present invention relates to a pad device that can be pressed down.

In the conventional pad device, when the type bar rotates upward as the rod advances (pulls) 5, the link mechanism is operated so that the pad escapes due to the rotational movement of the type bar.

In this case, the tensile force of the rod causes the rotation of the type bar and rotation link mechanism of the pad to act, so that an unreasonable force acts on the tension of the rod and the rotation of the type bar, and the printing strength is kept constant and stable. There was a drawback that I couldn't do it.

In order to keep the tensile force of the rod constant and the printing strength constant, the movement of the type bar and the movement of the 15 pad are separated, and by pulling the rod, only the type bar moves upward and prints. The pad may be rotated in a direction in which the pad is released by another rod so as not to come into contact with the type bar when the type bar is rotated upward.

20 However, the time for the type bar to rise, print, and fall may be longer or shorter depending on the strength of the tensile force of the rod, that is, the strength of the printing strength.

Therefore, it becomes necessary to return the pad in accordance with the timing of the rise, printing, and fall of the type bar25. That is,
Ideally, the pad should return the moment the type bar returns to the type bar holder.

The purpose of this invention is to move the type bar and pad using separate rods, and because the time for the type bar to return is not constant, the purpose of this invention is to set the time for the type bar to return as early as possible so that the return of the pad is never delayed. To provide a pad device which returns the pad at the same time and prevents the pad from returning before the type bar even if the type bar returns late.

Embodiments of the present invention will be described below with reference to the accompanying drawings.

In the figure, reference numeral 1 denotes a plate, on which the end of a type bar 3 is rotatably supported via a pin 2.

Further, a piece 6 is provided on one side of the type bar 3. When the type bar 3 is rotated in the upward direction by the tension of the rod 4, the piece 6 moves forward to engage the type A in the support cylinder 5.

The rotation of the type bar 3 by the rod 4 and the sliding of the piece 6 are achieved through a through hole 7 provided at the end of the piece 6 so that its upper and lower surfaces pass through, and at the end of the type bar 3, the lower end is inserted into the through hole 7. It is composed of a rocking plate 9 whose lower part is pivotally supported by a pin 8 so as to fit into it, and a pin 10 connecting the upper end of the rocking plate 9 and the tip of the rod 4.

A spring 11 for lowering and returning rotation is tensioned on the type bar 3.

Further, on the upper edge side of the tip of the plate 1, the upper part of the rotating plate 13 is pivotally supported by a pin 12.

At the lower end of this rotary plate 13, there is a type A fitted into the support tube 5.
A pad 14 that comes into contact with is pivotally supported. Above pad 1
A stopper 15 is provided on the plate 1 so as to come into contact with the rear edge of the lower end of the rotary plate 13 so that the letter A stops directly above the type A fitted into the support cylinder 5. Furthermore, the rotary plate 13 is rotated so that the pad 14 escapes from the ascending and descending track of the support cylinder 5, but this rotation is caused by the rotation of the shaft 16 rotatably supported on the plate 1 and the shaft 16. An inverted L-shaped crank 17 with a corner fixed to one end, a link 18 connecting the upper end of the crank 17 and the upper end of the rotating plate 13, and a shaft 1
A tilting plate 19 whose upper portion is fixed to the other end of the tilting plate 1
This is done by a rod 20 whose tip is connected to the lower end of the rod 9.

Further, the tip of the slide plate 21 is connected to the lower end of the crank 17 with a pin 22.

Furthermore, a cam 23 is provided at the end of the type bar 3, which rotates together with the type bar 3 and whose protrusion crosses the slide plate 21 even from the start of upward rotation of the type bar 3 to the time of printing.

Furthermore, at the end of the slide plate 21, there is a rotor 24 which is detached from the rim of the cam 23 only when the type bar 3 stops descending, and which comes into contact with the rim of the cam 23 even when the type is finished biting.
is provided. In the figure, 25 is a spring stretched between the plate 1 and the upper end of the tilting plate 19 so that the rod 20 slides back, 26 is a pin that pivots the end of the link 18, and 2
Reference numeral 7 denotes a long hole provided along the sliding direction at the end of the slide plate 21, and a pin 28 supported by the plate 1 is passed through the long hole 27 to guide the slide of the slide plate 21.

The pad device according to the present invention has the above configuration, and
To explain its action, when the type bar 3 is stopped falling, the rotor 24 comes off from the flange of the cam 23 as shown in FIG. 1, and the slide plate 21 is returned by the spring 25. While sliding, the rotary plate 13 is rotated back so that the pad 14 is lowered to the home position from the crank 17 via the link 18.

Next, after fitting the type A into the support cylinder 5, by pulling the rod 4, the piece 6 is pushed out by the rotation of the rocking plate 9, and the type A is held by the piece 6.

Further, since the rod 20 is also pulled at the same time as the rod 4 is pulled, the rotation of the tilting plate 19 is transmitted to the rotating plate 13 via the link 18.

Therefore, after the inset type A is positioned, it rises in the direction of escape.

After the type A is gripped by the piece 6, the type bar 3 is rotated upward by the rod 4, and the type is printed on the platen B.

Further, due to the tension of the rod 20, the slide plate 21 moves forward in the left direction in FIG. )It is in.

Therefore, there is no collision between the cam 23, which rotates together with the type bar 3, and the rotor 24. Next, the type bar 3 descends and rotates after printing, but at this time, the tension on the rod 20 is released (after printing), so the spring 25 causes the tilting plate to move downward.
It is assumed that the slide plate 21 does not return to its original position via 9.

At this time, since the rotor 24 is riding on the rim of the cam 23, the return rotation of the rotating plate 13 is prevented, and the pad 14 is stopped at a position off the descending track of the support tube 5. There is. When the type bar 3 has returned to its normal position, the rotor 24 is removed from the cam 23.

Therefore, at the same time that the restraint of the slide plate 21 is released and the slide plate 21 returns, the rotating plate 13 is rotated back via the link 17 from the crank 17 which is the same as the tilting plate 19, and is rotated directly above the support cylinder 5. Patsudo 14 will be there.

In addition, both rods 4 and 20 are moved forward by cams, and
The return of the rods 4 and 20 is carried out in such a way that the rotor comes off the rim of the cam (not shown).

As described above, according to the pad device according to the present invention, the pad is released by the forward movement of both rods as the printing starts, and
In addition, the type bar is rotated upward after the type is gripped, and the trochanter of the slide plate is placed on the rim of the cam that is the same as the type bar so that the pad will not return when the tension on both rods is released after printing. Once the type bar has returned to its normal position, the trochanter is removed from the cam and the pad returns to its normal position.

Therefore, the tensile force of the rod of the type bar can be kept constant, and the printing strength can be kept constant and stable.

Further, a constant printing pressure can be obtained, and the pad can be reliably returned after the return of the type bar is completed, regardless of the return speed of the type bar.

[Brief explanation of drawings]

The drawings show an example of the implementation of the present invention, in which Fig. 1 is a side view, Fig. 2 is a partially cutaway plan view of the same as above, Fig. 3 is a side view at the time of printing, and Fig. 4 is a return of the type bar. FIG. 5 is a side view of the same, and FIG. 5 is a perspective view showing the main parts of the same. A...Print, 1...Plate, 2...
...Pin, 3...Type bar, 4...
...Rod, 5...Support tube, 6...Piece, 7...Through hole, 8...Pin, 9...
...Rocking plate, 10...Pin.

Claims (1)

[Claims] 1 In a device in which the rod is pulled and driven by pressing down on the print key and the type bar is rotated in the printing direction via a rocking plate connected to the rod, printing is performed separately from the rod of the type bar. A rotary plate is provided so that the tip thereof is rotated upward via a crank and a link by the tension of the rod, which is later released from tension. a pad supported to perform stop positioning; a slide plate provided to move forward in conjunction with the upward rotation of the pad;
A cam that is the same as the type bar described above, and whose protruding edge crosses the slide plate as the type bar rotates upward; A pad device for a Japanese typewriter, consisting of a rotor installed so as to be mounted on it.