JPH0734691Y2 - Ink roll support mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to an ink roll in which a cover is rotatably held by an ink sponge impregnated with ink in a printer or the like, and in particular, replacement of the ink roll. The present invention relates to an ink roll support mechanism that can easily perform the above.

[Conventional technology]

FIG. 3 shows a general microprinter for two-color printing, in which an output shaft of a motor 2 attached to a resin frame 1 on the printer body side is provided with a transmission mechanism (not shown) in the middle. The drive pulley 3 is connected.
The drive pulley 3 faces one side of the frame 1, and the driven pulley 4 faces the other side of the frame 1. Around the drive pulley 3 and the driven pulley 4, there is wound an endless type belt 6 in which a large number of type bodies 5, 5, ...

A flat platen platen 7 is disposed on the frame 1 so as to face the type belt 6, and a type belt facing the platen 7 is provided between the drive pulley 3 and the driven pulley 4. 6 desired plate 5 to platen 7
A carriage 8 on which a hammer member for pressing the carriage is mounted is reciprocally movable in the lateral direction by a mechanism (not shown). The carriage 8 is returned to the home position in a free state by a spring member (not shown).

A rubber paper feed roller (not shown) is rotatably supported on the lower portion of the frame 1, and a pinch roller 9 is provided above the paper feed roller by a spring to feed the paper. The paper is inserted between the paper feed roller and the pinch roller 9, and the paper is conveyed between the platen 7 and the typeface 5 by rotationally driving the paper feed roller. It is supposed to do.

Further, in the vicinity of the drive pulley 3 and the driven pulley 4, the post shafts 10A protruding above the frame 1,
10B are projected integrally, and each of these post shafts 10A, 1
At 0B, as shown in detail in FIGS. 4 and 5 by omitting the reference numerals A and B, the ink rolls 11 for applying different color inks to the respective type bodies 5 of the type belt 6 are rotated. It is freely pivoted. Each of the post shafts 10 is configured such that a cylindrical small diameter portion 10b also extends above the large diameter cylindrical seating portion 10a. Each of the ink rolls 11 has a bearing hole 13 formed at one end thereof into which the small diameter portion 10b of the post shaft 10 is inserted, and a cover 12 detachably attached to the post shaft 10 inserted into the bearing hole 13. Have each cover
Ink sponge 14 of each color is provided in 12 as a pair of ink bobbins 1
It is rotatably held by 5,15. Each ink sponge 14 projects outward from the side of the cover 12.
Then, for example, the ink sponge 14 of the ink roll 11 mounted on the post shaft 10 on the driving pulley 3 side is impregnated with red ink, and is mounted on the post shaft 10 on the driven pulley 4 side. The ink sponge 14 of the ink roll 11 is impregnated with black ink.

As shown in detail in FIG. 4, support pins 16 projecting upward from the frame 1 are provided on the frame 1 in the vicinity of the ink rolls 11, and each support pin 16 has the cover 12 thereon. A wire spring 17 that presses the ink sponge 14 against the type belt 6 is supported. The cover 12
A first protrusion 18 having an inclined surface 19 for pressing the wire spring 17 when the ink roll 11 is mounted is provided on the lower surface of the first projection 18. Further, in order to prevent the ink roll 11 from accidentally falling off from the post shaft 10, the cover 12 of the ink roll 11 has a second rectangular parallelepiped shape protruding outward in the horizontal direction at a position separated from the post shaft 10. The protrusion 20 is provided so as to project. On the other hand, the frame 1 is provided with substantially L-shaped stoppers 21. The locking portions 22 of the respective stoppers 21 extending in the horizontal direction are such that the ink sponge 14 is pressed against the type belt 6. In the state in which the second projection 20 is present, the second projection 20 is closely faced. The locking portion 22 of the stopper 21
When the ink roll 11 is mounted on the upper surface of the second protrusion 20
An inclined guide surface 23 for guiding the is formed. When the inclination angle of the guide surface 23 is steep to some extent, the ink roll 11 can be inserted easily. Furthermore, the cover
A U-shaped handle 24 is projectingly provided on the upper portion of the 12, and the handle 24 is used for gripping with a finger when the ink roll 11 is replaced.

To mount the post shaft 10 on the ink roll 11 with the above-described configuration, the bearing hole 13 of the ink roll 11 is fitted to the upper portion of the small diameter portion 10b of the post shaft 10 and is engaged with the cover 12 of the ink roll 11. The second protrusion 20 is seated on the upper surface of the stopper 21, and then the ink roll 11 is rotated counterclockwise in FIG. 4 so that the second protrusion 20 follows the inclined guide surface 23. To do. Then, the second projection 20 abuts on the lower position of the guide surface 23 in the vertical direction, so that the bearing hole 13 gradually increases the fitting length of the post shaft 10 to the small diameter portion 10b. At this time, the first protrusion 18 protruding from the lower surface of the ink roll 11 pushes the wire spring 17 against its elastic force. Then, when the second protrusion 20 is disengaged from the end of the guide surface 23, the outer circumference of the bearing hole 13 of the ink roll 11 is pushed down by pushing the ink roll 11 downward.
Since it sits on the seat portion 10a of the
4 together with the elastic force of the wire spring 17 is rotated clockwise in FIG. 4 to stop the second protrusion 20 as a stopper as shown in FIG.
The ink roll is made to face directly under the locking portion 22 of 21.
Installation of 11 is completed.

Next, in order to perform printing, the drive pulley 3 is rotated by the rotation of the motor 2, and the driven pulley 4 is rotated and the type belt 6 is run accordingly. Then, after the rotation of the drive pulley 3 is stopped to stop the desired character 5 at a position facing the carriage 8, the carriage 8 is stopped.
By driving the hammer member therein, and pressing the typeface 5 against the sheet facing the front of the platen 7, the ink applied to the typeface 5 is transferred to the sheet and printing is performed. Then, the ink is applied to the type body 5 by causing the ink sponge 14 of each of the ink rolls 11 to the type body 5 for the color of the type belt 6 and the elasticity of the wire spring 17 when the type belt 6 is rotated. By selectively pressing.

[Problems to be solved by the device]

By the way, when the ink roll 11 is replaced, in order to remove the ink roll 11 from the post shaft 10,
In the figure, rotate counterclockwise to stop the second protrusion 20.
Ink roll 11 after being released from just below the locking part 22 of 21
It is necessary to perform a two-step operation of pulling the ink upward, which makes the replacement work of the ink roll 11 complicated.

An object of the present invention is to provide an ink roll support mechanism that overcomes the problems of the conventional ones and can easily remove the ink roll from the post shaft.

[Means for Solving the Problems]

In order to achieve the above-mentioned object, the present invention rotatably pivots an ink roll cover, which holds an ink sponge rotatably, on a post shaft projecting from a printer body, and the ink roll is printed on the cover by a typeface. The first protrusion having an inclined surface for pressing the wire spring biasing in the downward direction is projected downward, and the second protrusion for preventing the ink roll from falling off the post shaft is projected. In the ink roll support mechanism, the printer main body is provided with a stopper having a guide surface for guiding the second protrusion when the ink roll is mounted, and a cover of the ink roll is attached to the post shaft of the ink roll. It is characterized in that a guide member having an inclined surface for allowing the ink roll to float along with the rotation around the center is provided so as to project near the stopper. There.

[Action]

According to the present invention having the above-described structure, in order to remove the ink roll from the post shaft, the ink roll is rotated in the direction of approaching the guide member against the elastic force of the wire spring. Then, as the lower corner of the cover rides on the inclined surface of the guide member, the ink roll gradually floats up, and in the middle of this, the wire spring comes into pressure contact with the inclined surface of the protrusion, and thus the elastic force of the wire spring in the vertical component force. This makes it possible to further raise the ink roll. As a result, the ink roll can be removed from the post shaft by simply rotating the ink roll.

〔Example〕

Hereinafter, the present invention will be described with reference to the embodiments shown in the drawings. The outline of the present invention is similar to that of FIG.
Only configurations different from those shown in FIGS. 1 and 2 are shown in FIGS.
A and B will be explained. Further, the same configurations as those of the conventional one described above are denoted by the same reference numerals in FIGS. 1 and 2A and 2B, and the description thereof will be omitted.

1 and 2A and 2B, a block-shaped guide member 30 is erected on the frame 1 near the support pin 16 that supports the wire spring 17. The guide member 30 is provided with an ascending slope 31 on the side facing the cover 12 of the ink roll 11, and the slope 31 is rotated around the post shaft 10 of the ink roll 11. Accordingly, the lower corner portion of the cover 12 can be slidably contacted. The ink roll
When the lower corner of 11 slidably contacts the inclined surface 31 of the guide member 30,
The second protrusion 20 of the ink roll 11 is released from immediately below the locking portion 22 of the stopper 21. The inclined surface 31 is formed so that the ink roll 11 can be floated at least until the wire spring 17 comes into pressure contact with the inclined surface 19 of the first protrusion 18.

Next, the operation of this embodiment having the above-described configuration will be described.

To remove the ink roll 11 from the post shaft 10,
In the drawing, the ink roll 11 is rotated in the counterclockwise direction (the direction of arrow A in FIG. 2A), that is, the direction in which the cover 12 approaches the guide member 30. Then, the ink roll 11 is rotated so that the wire spring 17 is hooked on the first protrusion 18, and the lower corner of the cover 12 is released at a position where the second protrusion 20 is released from immediately below the locking portion 22 of the stopper 21. The ink roll 11 rides on the inclined surface 31 of the guide member 30 and gradually floats from the seating portion 10a of the post shaft 10. Then, as shown in FIG. 2B, when the wire spring 17 is pressed against the inclined surface 19 of the first projection 18 provided on the lower surface of the cover 12 while the ink roll 11 is floating, the wire spring 17 is pressed. The ink roll 11 can be further floated by the vertical component of the elastic force of 17.

As described above, according to the present embodiment, the ink roll 11 can be removed from the post shaft 10 by simply rotating the ink roll 11 without pulling up the ink roll 11, so that the ink roll 11 can be easily replaced. You can do it again
Ink roll 11 floats naturally, so ink roll 11
An unreasonable force does not act on the post shaft 10 when it is levitated, and there is no possibility of breaking the post shaft 10.

It should be noted that the present invention is not limited to the above-described embodiments, and various modifications can be made as necessary.

[Effect of device]

As described above, according to the present invention, there is a practical effect that the ink roll can be easily removed from the post shaft.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of an ink roll support mechanism according to the present invention, FIGS. 2A and 2B are side views showing the operation of this embodiment, and FIG. 3 is a plan view of a general micro printer. Fourth
FIG. 5 and FIG. 5 are a plan view and a side view showing a conventional ink roll support mechanism. 1 ... Frame, 10 ... Post shaft, 11 ... Ink roll, 12 ... Cover, 14 ... Ink sponge, 17 ... Wire spring, 18 ... First protrusion, 19, 31 ... Inclined surface, 20 …… Second protrusion, 21 …… Stopper, 30 …… Guide member.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-59-114075 (JP, A) Actually open 59-7857 (JP, U) Actually open 60-8064 (JP, U) Actually open 60- 101166 (JP, U)

Claims (1)

[Scope of utility model registration request] 1. A line for rotatably pivoting a cover of an ink roll, which holds an ink sponge rotatably, on a post shaft protruding from a printer main body, and a line for urging the ink roll in the direction of a print type on the cover. A first protrusion having an inclined surface for pressing the spring downward is provided so as to project downward, and a second protrusion for preventing the ink roll from coming off from the post shaft is provided so as to be provided on the printer body. An ink roll support mechanism comprising a stopper provided with a guide surface for guiding the second protrusion when the ink roll is mounted,
A guide member having an inclined surface that floats the ink roll along the rotation of the cover of the ink roll about the post shaft of the ink roll is provided in the vicinity of the stopper. Characteristic ink roll support mechanism.