JPS5912199Y2 - printing device - Google Patents

Description

[Detailed description of the invention] This invention is a printing device in which a motor that drives a type wheel is rotatably attached to a carriage, and the type wheel, which is directly connected to the motor's rotation axis, can be easily attached and detached. Regarding.

2. Description of the Related Art A printing device has been developed in which a type wheel having a large number of type characters arranged radially is directly connected to a rotating shaft of a motor, and a predetermined type facing a platen is struck from behind to perform printing.

In this type of printing device, since the type wheel is located close to the platen, the entire carriage or the motor for driving the type wheel must be removed for installation or removal, which is troublesome.

This idea was devised in light of these circumstances, and its purpose was to directly connect a type wheel with a large number of type letters arranged in a radial manner to the rotating shaft of the motor, and to connect it to the platen.
In a printing device that performs printing by hitting a predetermined type facing toward the rear from behind, the motor is rotatably attached to a carriage, the motor is rotated at appropriate times to raise the rotating shaft, and in this state, The purpose is to allow the type ring to be easily attached and detached.

An embodiment of this invention will be described below with reference to the drawings.

FIG. 1 is a side view of the carriage 1 of the printing device. As shown in this figure, the carriage 1 is arranged parallel to the axis of the platen 2, and the brackets 3 are connected to each other. It is supported by two shafts 4 and 5 that are connected through the shaft.

That is, the pair of left and right frames 6 of the carriage 1 are
Three rollers rolling along a shaft 4 are pivotally supported at one end near the platen 1, and two rollers 8 rolling along a shaft 5 are pivotally supported at the other end. The entire body is moved parallel to the axis of the platen 2.

An ink ribbon cassette 9 is set at the upper ends of both frames 6, and a motor case 10 is rotatably pivoted between the two frames along a plane perpendicular to the axis of the platen 2 via a support shaft 11. It is worn.

The motor case 10 has a motor 1 for driving the type wheel inside.
The rotary shaft 14 of the motor 13 is led out to the outside through a through hole 13 formed in the front surface of the motor 2.

A type wheel 16 in which a large number of type letters 15 are arranged radially is directly connected to the rotating shaft 14 in a removable manner.

A printing hammer 17 is located at the upper end of the motor case 10, and
Paper pressers 18 are attached to the front of the type wheels 16, respectively.

A hook 19 is provided at the center of the lower front end of the motor case 10.
is rotatably pivoted by a pin 20.

This hook 19 has an arm portion 21 extending laterally, and a square hole 22 is formed at the tip of the arm portion 21.

An L-shaped release lever 23 is pivotally attached to one side of the motor case 10 at its bent portion via a pin 24 so as to be rotatable within a certain range.

One end of the release lever 23 extends upward, and the other end is inserted into the square hole 22 of the hook 19.

Also, the vicinity of the pivot joint of this lever 23 and the motor case 1
Spring hooks 25 and 26 are provided protruding from the sides of the release lever 2, respectively, and a toggle spring 27 is hung between the spring hooks 25 and 26, thereby releasing the release lever 2.
3 rotates articulately and is selectively and stably held at both end positions of the rotation range.

Note that 28 in the figure is a stopper pin of the release lever 23 that is protruded from the motor case 10.

On the other hand, a support base 29 is provided below the motor case 10 to support the rotating end of the motor case 10.

This support stand 29 is fixed to the frame 6, and an elastic member 30 such as rubber or foamed resin is mounted on the upper surface of the support stand 29.
is attached, and a locking pin 31 is provided protruding from the front surface thereof.

In the printing device configured as described above, when printing, the motor case 10 is rotated downward and its lower surface is placed on the upper surface of the support base 29, and the hook 19 is attached to the locking pin 31. Hang it up.

In this state, the rotation shaft 14 of the motor 12 is oriented horizontally, the type 15 located at the upper end of the type wheel 16 faces the front surface of the platen 2, and the paper presser 18
and the platen 2.

Note that the paper presser 18 has an opening corresponding to the printing position.

The ink ribbon in the ink ribbon cassette 9 is stretched between a pair of ribbon guides (not shown) provided on both sides of the type ring 16.

Therefore, when a predetermined printing signal is given and the motor 12 rotates so that a predetermined type 15 faces the platen 2, the printing hammer 17 is actuated by a striking mechanism (not shown) to strike the type 15 from the rear and hit the platen 2. Predetermined printing is performed on the printing paper wrapped in the paper.

In this printing device, when replacing the type wheel 16, the release lever 23 is rotated in the direction of arrow A, the hook 19 is removed from the locking pin 31, and the motor case 10 is
When the type wheel 16 and the paper presser foot 18 are rotated upward by about 90 degrees, the type ring 16 and paper presser foot 18 move to the positions shown in phantom lines in FIG.

Therefore, in this state, the type wheel 16 can be easily replaced by simply removing the paper presser 18.

Therefore, according to the above embodiment, since the motor case 10 is rotatably mounted, the type ring 16, which is directly connected to the rotating shaft 14 of the motor 12 in the case 10, can be easily attached and detached. Unlike the conventional method, there is no need to remove the entire carriage or motor in order to attach or detach the type wheel, and work efficiency can be improved.

Furthermore, the motor case 10 can be easily held in a fixed position by the hook 19.

"Since the front center position is locked, a stable locking condition can be obtained.

Furthermore, since the release lever 23 is pivotally attached to the side surface of the motor 10, even though the hook 19 is located in a location where it is difficult to engage and disengage, the hook 19 can be removed very easily by rotating the release lever 23. Can be engaged and disengaged.

Furthermore, a toggle spring 27 is interposed between the release lever and the motor case 10 so that the lever 23 can be rotated articulately. 23 and hook 19
and can be held in a locked position or a released position.

Furthermore, since an elastic member 30 such as rubber or foamed resin is attached to the upper surface of the support base 29 on which the rotating end of the motor case 10 is placed, the impact force when lowering the motor case 10 downward is applied. Also, the elastic member 30 can absorb vibrations of the motor 12 while the motor case 10 is locked in a fixed position.

Note that this invention is not limited to the above embodiments,
For example, the semi-motor case 10 may be omitted and the support shaft 11 may be directly attached to the motor.

As described in detail above, according to this invention, the motor for driving the type wheel is rotatably mounted on the canopy along a plane perpendicular to the axis of the platen, and the motor is mounted at a fixed position. By providing a hook that engages with the motor and a release lever that releases the hook, it is possible to provide a printing device in which the type wheel directly connected to the rotating shaft of the motor can be easily attached, detached, and replaced.

[Brief explanation of the drawing]

FIG. 1 is a side view showing an embodiment of this invention, and FIG. 2 is an exploded perspective view showing only the main parts of the embodiment. 1... Carriage, 2... Platen,
10... Motor case, 12... Motor, 14... Rotating shaft, 15... Type,
16... Type wheel, 17... Printing hammer, 19... Hook, 23... Release lever, 31... Locking pin.

Claims (1)

[Scope of utility model registration request] A printing device in which a type wheel with a large number of type characters arranged in a radial pattern is removably directly connected to the rotating shaft of a motor, and a predetermined type facing a platen is struck from behind to perform printing.
a carriage that is movable parallel to the axis of the platen and pivots the motor so as to be rotatable along a plane perpendicular to the axis, and rotates the motor to enable attachment and detachment of the type wheel;
A hook is attached to the case of the motor so as to lock the motor in the loading position at the front central position of the carriage, and one end of the hook is pivotally attached to the side surface of the motor case so as to be rotatable within a certain range. and a toggle spring that selectively and stably holds the release lever at both end positions of a rotation range. printing device.