JPS5856355B2 - Type gripping device in the type bar of a Japanese typewriter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a type gripping device for a type bar of a Japanese typewriter.

In a conventional Japanese typewriter type bar type printing device, as the rod starts moving forward, the piece slides in the opposite direction to the rod, and as a result, the tip of the piece hits the type and the type bar The rotation was increasing and printing was being performed.

However, in this printing device, if the rotation angle of the type bar is θ, the gripping force of the type is COS θ times the tensile force of the rod.

Due to this relationship, 1 at the start of the rise of the type bar
With respect to the biting force of 0.001%, the closer the rotation is to the platen (as θ approaches 90°), the closer the biting force becomes to 0.

As a result, the gripping force of the type at the time of printing is lost, resulting in defects such as variations in line thickness and double printing.

The purpose of this invention is to use a cam to further push out the piece when the type bar approaches the platen, thereby firmly gripping the type, and thereby eliminating variations in line thickness or double printing. The purpose of the present invention is to provide a type occlusion device.

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.

4 is a type support cylinder provided at the tip of the type bar 3;
This support cylinder 4 is provided with a through window 5 through which the outer periphery and the inner periphery communicate within the range from the rear surface to both side surfaces.

Reference numeral 6 denotes a piece provided on one side of the type bar 3 so as to be slidable along the longitudinal direction of the type bar 3, and the tip of the piece 6 fits into the through hole 5 on the rear surface of the support tube 4. ing.

Further, at the tip of the piece 6, the base of a leaf spring 7 that presses the type A toward the reference surface in the support cylinder 4 is rotatably attached.

8 is the front side of pin 2, and pin 9 is the lower part on the side of type bar 3.
The lower end of the swing piece 8 is fitted into a through hole 10 provided at the end of the piece 2.

Furthermore, a rotating body 11 is provided which rotates together with the type bar 3 using the pin 2 as a fulcrum during the upward rotation of the type bar 3. A side plate 13 connected from the edge and pivotally supported at the end by a pin 2, and a connecting plate 1 placed directly above the type bar 3.
2, and a buffer member 15 made of rubber or the like fitted onto the protrusion 14.

Further, a cam piece 1 is attached to the side surface of the rotating body 11 by a pin 16.
7 is pivoted.

A spring 18 is stretched between the rearward end of the cam piece 17 and the plate 1, and as the rotating body 11 rotates, the spring 18 is tensed and the cam piece 17 rotates, and the cam piece 17 rotates. The protrusion of the piece 17 is directed forward.

Furthermore, a cam piece is attached to the upper edge of the plate 1 just before printing.
A stopper 2 that contacts the trochanter 19 provided at the end of the
0 is provided, just before printing, the projecting edge of the cam piece 1γ faces forward, and the piece 6 is pushed out by a trochanter 23 provided on the piece 6 so as to be in contact with the projecting edge of the cam piece 17.

Therefore, the tip of the extruded piece 6 can press the type A toward the reference surface in the support cylinder 4.

Further, the tip of a reciprocating rod 21 is connected to the upper end of the swinging piece 8 by a pin 22.

In the figure, 24 is a spring for returning the type bar 3, and 25 is a spring for returning the rotating body 11.

Note that instead of the trochanter 19, a protrusion such as a protrusion may be brought into contact with the cam piece.

The use of the type gripping device according to the present invention will be explained based on the above-mentioned configuration. When the type bar 3 is returned to its original position by descending and rotating, , the rotary body 11 returns by downward rotation, and the cam piece 17
The tip of the ridge is directed downward.

Also, since the rod 21 has moved backward in the right direction in Figure 1,
The swinging piece 8 rotates clockwise in FIG.

Therefore, the piece 6 moves backward, and the tip of the piece 6 and the leaf spring 7 escape from the support cylinder 4.

Thus, the type A is fitted into the support cylinder 4, and the rod 2
When the piece 1 moves forward, the piece 6 is first moved by the rotation of the swinging piece 8.
moves forward.

Therefore, the type A in the support cylinder 4 is held by the tip of the piece 6 and the leaf spring 7, and the plate spring 7 presses the type A into one surface of the L shape in the support cylinder 4. .

Next, as the swing piece 8 continues to rotate, the type bar 3 starts to rotate upward.

At this time, the trochanter 23 faces the tip edge of the cam piece 17, and the type bar 3 comes into contact with the lower surface of the buffer member 15.

Therefore, the rotating body 11 rotates upward together with the type bar 3.

At this time, the cam piece 17 rotates due to the tension of the spring 18, and the lower portion of the protruding edge of the cam piece 17 comes into contact with the trochanter 23.

Immediately before the above-mentioned type A is printed on the platen B, the trochanter 19 comes into contact with the stopper 20, and the cam piece 1 moves counterclockwise in FIG.
Rotate 7.

Therefore, the trochanter 23, which is in contact with the lower part of the tip edge of the cam piece 17, faces the most edge edge and pushes out the piece 6.
At the tip of this piece 6, type A is placed on the remaining reference surface inside the support tube 4.
Press firmly and then print.

When the type bar 3 rotates back after the above-mentioned printing, the trochanter 23 comes off from the stopper 20 and the cam piece 17 rotates back.

As described above, according to the gripping device of the present invention, the support rotating body of the cam piece is rotated as the type bar is rotated upward, and the cam piece is rotated by the stopper immediately before printing. Since the piece is pushed out further, the type in the support cylinder can be firmly gripped.

For this reason, it is possible to prevent printing blurring and eliminate variations in line thickness and double images, unlike in the past.

[Brief explanation of the drawing]

The drawings show an example of the implementation of the present invention, in which Fig. 1 is a side view showing the state before the type bar is rotated, Fig. 2 is a plan view of the same,
FIG. 3 is an enlarged side view showing the main parts of the same as above, FIG. 4 is a side view during printing, and FIG. 5 is an enlarged cross-sectional plan view of the support cylinder. A...Print, 1...Plate, 2...
...Pin, 3...Type bar 4...
...Support tube, 5...Through window, 6...Piece, 7...Spring, 8...Rocking piece, 9...
...Pin, 10...Through hole, 11...
...Rotating body, 12...Connecting plate, 13...
- Side plate, 14... Protruding piece, 15... Buffer member.

Claims (1)

[Claims] 1. In a type bar that pushes out a leaf spring that engages the type fitted in the support tube of the type bar and a piece integrated with this leaf spring before the type bar starts to rotate upward by sliding the rod, the type bar To support the type bar, the terminal of a rotating body that rotates together with the type bar is pivoted from the middle of the rising rotation, and a cam piece is pivoted on this rotating body, and just before the type bar is rotated, it is in contact with the terminal of the cam and the terminal of the cam is A type bar for a Japanese typewriter, characterized in that a stopper is provided to direct the most projecting edge toward the support cylinder, and the piece is provided with a protrusion such as a trochanter that contacts the projecting edge of the cam piece and pushes out the piece. Type occlusion device.