JPH028759Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a type body attaching/detaching device for attaching or detaching a type wheel in a serial type printer having a petal type type wheel.

Conventionally, in a printer having a petal type type wheel, for example, as shown in FIG. A support hole 11a into which the tip of the drive shaft m can be fitted is formed in the portion 11c, and a positioning hole 11b into which the pin 10a is fitted is formed at a distance outward from the axis of the support hole 11a. The wheel 11 was supported by the drive shaft m, but as shown in FIG. 1, the space between the tip of the drive shaft m of the motor M and the platen 1 was narrow, making it difficult to attach and detach the type wheel 11. Therefore, it is necessary to mount the type wheel 11 after the motor M is erected as shown in FIG. This has the drawback of reducing the efficiency of the operations for attaching and detaching the type wheel 11.

The object of this invention is to solve the above-mentioned drawbacks and to provide a type body attaching/detaching device which has a simple structure and allows a type wheel to be attached and detached with a single touch.

Hereinafter, an embodiment of this invention will be described with reference to the drawings.A carriage 2 supported on a machine frame so as to be movable in parallel to a platen 1 is provided with a pair of substantially Z-shaped supports 3, 3 arranged upwardly and parallelly. The parts 3a, 3a are parallel to each other in the direction intersecting the direction of movement of the carriage 2 (directions of arrows A and B), and the parallel parts 3a, 3a are spaced apart from each other in the direction of movement of the carriage 2 and are parallel to each other downward. The parts 3b, 3b are fixed. A substantially U-shaped frame 4 has a rearward-opening fitting that is slidably fitted and supported in the directions of arrows A and B, respectively, on the upper parallel portions 3a, 3a of both supports 3, 3. Groove 4
b and 4b are formed on both sides 4a and 4a, and a drive shaft m is provided in the middle part of the frame 4 so that the axis of the drive shaft m whose tip is a free end and whose tip m is tapered coincides with the direction of arrows A and B. A stepping motor (hereinafter referred to as a motor) M is fixed to the motor, and the intermediate part of the drive shaft m is
A disk-shaped flange 12 having a cutout groove 12a formed on its outer circumferential surface is fixed. The type wheel 14 is
It is a petal-shaped type body with spokes in which a plurality of different types 14a are arranged radially around a disk-shaped support portion 14b, and the tip m1 of the drive shaft of the motor M is fitted onto the center axis of the support portion 14b. A notch groove 1 of the flange 12 is provided, which is spaced apart in the radial direction from the fitting hole 14c, and is located at an operating position and a separated position of the motor M, which will be described later.
A protrusion 14d that protrudes in the axial direction is formed so as to be able to engage with the protrusion 2a. As shown in FIG. 6, a groove m2 is formed along the circumferential direction on the base side in the axial direction of the distal end, and both sides of the support part 14b protrude into the fitting hole 14c to engage with the groove m2 of the drive shaft m. possible (7th
A flexible U-shaped pin 15 is embedded,
The type wheel 14 is formed by this groove m2 and the pin 15.
The projection 14d and the notch groove 12a constitute a means for attaching and detaching the type wheel 14 and the drive shaft m in the axial direction (second attaching and detaching means). Configure. An upwardly opening opening 13a is provided on the carriage 2 between the motor M and the platen 1.
A flat, hollow, substantially square case 13 into which a drive shaft 4 can be inserted is fixed so as to be orthogonal to the axis of the drive shaft m. A type wheel 14 is provided on the upper edge of the case 13.
A notch 13b is formed in a V-shape so that the type 14a can be stamped with a hammer (not shown) with the flange 12 inserted in the axial direction. A circular window portion 13d (FIG. 5) is provided to enable fitting and separation, and a guide groove 13c is provided so that the notch portion 13b and the window portion 13d communicate with each other so that the protrusion 14d of the type wheel 14 can be guided. establish.

A spring 9 is stretched between the frame body 4 and the carriage 2, and the drive shaft m of the motor M is always connected to the type wheel 1.
The lever 7 is held at a position apart from the fitting hole 14a of the frame 4, and a lever 7 provided with a hook portion 7a below is supported on one side 4a of the frame 4 so as to be rotatable about one axis. The lever 7 is always subjected to a counterclockwise rotational force (see FIGS. 8 and 9) by a spring 8, and its rotation in the counterclockwise direction is restricted by a protrusion 4c provided on the side 4a of the frame 4. This lever 7 and a locking body 6 that is fixed to the carriage 2 and stands upwardly so as to be able to engage and detach from the hook 7a of the lever 7 cause the motor M to move against the spring 8 and drive the drive shaft m. A locking means is configured to stop the type wheel 11 at an operating position where it fits into the fitting hole 14a of the type wheel 11.

Although not shown in the drawings, the printer of this embodiment has a configuration in which the drive shaft m of the motor M is stopped so that the notch groove 12a faces upward when printing is completed, using a rotation angle detection means and an electric control means of the motor M. shall have it.

This invention has the above configuration, and its operation will be explained next.

First, when installing the type wheel 14,
Move the frame 4 to which the motor M is fixed to a remote position (Fig. 8)
, and then move the type wheel 14 to the projection 1
4d faces the motor M side and the fitting hole 14c is vertically below the protrusion 14d.
Insert it from above. At this time, the protrusion 14d is guided by the guide groove 13c, so it does not collide with the case 13, and the flange 12 facing vertically upward
It engages with the notch groove 12a of. When the frame 4 is then pushed in the direction A against the force of the spring 9, the lower end of the lever 7 comes into contact with the locking body 6, and the lever 7 is pushed clockwise against the force of the spring 8. An acting force is applied. When the frame body 4 is further pushed in the direction A, the frame body 4 reaches the operating position shown in FIG.
However, since the pin 15 is flexible, it passes over the tapered surface of the tip m1 and enters the groove m2 of the drive shaft m.
The type wheel 14 is thereby connected to the drive shaft m, and the hook portion 7 of the lever 7
a engages with the front end (left end in FIG. 9) of the locking body 6, so the frame body 4 is held in the state shown in FIG. 9 by the acting force of the spring 8.

To remove the type wheel 14 from the drive shaft m, contrary to the above, pull the upper end of the lever 7 in the direction of arrow B against the force of the spring 8 to release the hook 7a from the locking body 6. The frame body 4 is moved to B by the force of the spring 9.
Start moving in the direction. Since the pin 15 (see Fig. 7) fitted into the groove m2 of the drive shaft m is flexible, it is bent by the action of the spring 9, thereby preventing the pin 15 from fitting into the groove m2. Once removed, the drive shaft m escapes from the fitting hole 14a, and the frame body 4 is placed in the separated position (FIG. 8). After that, when the type wheel 14 is pulled upward, the protrusion 14d of the type wheel 14 is inserted into the notch groove 12a of the flange 12 and the guide groove 13c of the case 13 (FIG. 5) since the notch groove 12a faces upward. The type wheel 14 can be removed from the case 13 by moving along.

As described above, according to this invention, the motor M for type selection is placed at an operating position where the tip of the drive shaft is close to the platen 1 along the direction intersecting with the moving direction of the carriage 2; The carriage 2 is movable to a remote position away from the platen 1.
supported by the carriage 2, parallel to the moving direction of the carriage 2, and fixed to the carriage in close opposition to the platen 1;
An opening 13a that opens upward and allows the type wheel to move in and out vertically; a window 13d that penetrates and opens in a direction intersecting the carriage movement path; and a guide groove 13c that communicates the opening 13a and the window 13d. A case 13 is formed, and a working position where the tip of the drive shaft m, which faces the platen with the case in between and extends in a direction intersecting with the movement path of the carriage, is inserted into the window of the case, and a tip spaced apart in the axial direction from the operating position. a motor M supported on a carriage so as to be movable to a remote position where it is removed from a window of the case, and a type wheel removably locked in the radial direction of the drive shaft of the motor in the operating position and the remote position; First attachment/detachment means 12a and 14d are provided on both the type wheel and the drive shaft so as to pass through the guide groove 13c of the case 13 and connect the type wheel and the drive shaft in the direction of rotation, and the type wheel and the drive shaft are connected to each other by elastic force at the operating position of the motor. a second attachment/detachment means (m) connected to the drive shaft in the axial direction, and provided on both sides so as to separate the type wheel and the drive shaft in the axial direction at a remote position of the motor;
2, 14c, and 15, the type wheel 14 can be connected to the drive shaft m of the motor M by simply inserting the type wheel 14 into the case 13 and moving the motor M to the operating position, which eliminates complicated positioning operations. Since the type wheel 14 is not required, the mounting operation of the type wheel 14 can be made extremely easy.

In addition, as a means for stopping the motor M so that the notch groove 12a of the flange 12 faces upward, this operation can be performed manually without providing the rotation angle detection means and the electric control means as described above. You can also do this.

[Brief explanation of the drawing]

Figure 1 is a diagram showing a state in which the typeface and platen face each other in a conventional printer, Figure 2 is a diagram showing a conventional printer in which the motor is erected to attach and remove the typeface, and Figure 3 is a diagram showing the conventional printer. Figures 4 and 5 are perspective views of the type attachment/removal device of the present invention, and Figure 6 shows the arrangement of the positioning means between the motor drive shaft and the type in a printer. A perspective view of the attachment/detachment means, FIG. 7 is a sectional view showing the fitted state of the drive shaft and the fitting hole of the type body, FIG. 8 is a view of the frame (motor) in a separated position, and FIG. 9 is the frame FIG. 3 is a diagram of the operating position of the motor.

Claims (1)

[Scope of Claim for Utility Model Registration] A platen 1 fixed to the machine frame, a carriage 2 supported on the machine frame so as to be movable along the platen 1, and a petal-shaped type wheel 14 with a plurality of different types arranged radially from the center. and an opening 1 which is parallel to the moving path of the carriage 2, is fixed to the carriage in close opposition to the platen 1, and opens upward to allow the type wheel to enter and exit vertically.
A case 13c is formed with a window 13d that penetrates and opens in a direction crossing the movement path of the carriage 3a and the carriage movement path, and a guide groove 13c that communicates the opening 13a and the window 13d. , the drive shaft m along the direction intersecting the movement path of the carriage can be moved between an operating position where the tip fits into the window of the case and a remote position where it is spaced apart in the axial direction and the tip is removed from the window of the case. A motor M is supported on a carriage, and the type wheel is removably locked in the radial direction of the drive shaft of the motor at the working position and the remote position, and the type wheel and the drive shaft are connected to each other by passing through the guide groove 13c of the case 13. and first attachment/detachment means 12a, 14 provided on both sides so as to connect the two in the rotation direction.
d, and a second portion provided on both sides so as to connect the type wheel and the drive shaft in the axial direction by elastic force at the motor operating position, and to separate the type wheel and the drive shaft in the axial direction at the remote position of the motor. A typeface attachment/detachment device for a printer, comprising attachment/detachment means m2, 14c, 15.