JPH0732075Y2 - Ink roll mounting structure - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention is an ink in which an ink roll, which is rotatably held by a cover of an ink sponge impregnated with ink in a printer or the like, is mounted on the main body side of the printer or the like. The present invention relates to a roll mounting structure, and particularly to an ink roll mounting structure when printing is performed using two or more colors of ink.

[Conventional technology]

FIG. 7 shows a conventional micro printer. A drive pulley 3 is connected to an output shaft of a motor 2 mounted on a frame 1 on the printer body side via a transmission mechanism (not shown). The drive pulley 3 faces one side of the frame 1, and the driven pulley 4 faces the other side of the frame 1. The drive pulley 3 and the driven pulley 4 have a large number of type bodies 5, 5, ...
Are wound around the type belt 6 protruding from each other at intervals.

A flat platen platen 7 is disposed in the frame 1 so as to face the type belt 6, and a desired type belt 6 on the platen 7 side is provided between the drive pulley 3 and the driven pulley 4. A carriage 8 having a hammer member that presses the typeface 5 against the platen 7 is disposed so as to be reciprocally movable laterally by a mechanism (not shown). The carriage 8 is arranged so as to be capable of reciprocating laterally 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 part of the frame 1, and a pinch roller 9 is provided above the paper feed roller by a spring. It is arranged so as to come into pressure contact with. Then, the paper is inserted between the paper feed roller and the pinch roller 9, and the paper is conveyed between the platen and the typeface 5 by the rotational driving of the paper feed roller.

Further, in the vicinity of the drive pulley 3 and the driven pulley 4, holding shafts 10A, 10 projecting above the frame 1 are respectively provided.
B is fixed, and ink rolls 11A and 11B for applying different color inks to the character bodies 5 of the character belt 6 are attached to the respective holding shafts 10A and 10B. Each of these ink rolls 11A, 11B is configured to rotatably hold the ink sponges 13A, 13B of the respective colors on the covers 12A, 12B by the ink bobbins 14A, 14A, 14B, 14B, and the ink sponges 13A, 13B. Are projected to the outside from the sides of the covers 12A and 12B. Then, for example, the holding shaft 10A on the drive pulley 3 side
The ink sponge 13A of the ink roll 11A attached to the ink roller is impregnated with red ink, and the ink sponge 13B of the ink roll 11B attached to the holding shaft 10B on the driven pulley 4 side has black ink. Is soaked in.

According to the above-mentioned structure, 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 along with the rotation of the drive pulley 3. Then, the rotation of the drive pulley 3 is stopped to stop the desired type body 5 at a position facing the carriage 8, and then a hammer member in the carriage 8 is driven to face the type body 5 in front of the platen 7. By pressing against, the ink applied to the typeface 5 is transferred to the paper and printing is performed. Then, at the time of printing, when the type belt 6 is rotated,
The ink sponges 13A and 13B of the ink rolls 11A and 11B are selectively brought into pressure contact with the type body 5 for the color of the type belt 6 so that a desired color can be printed.

[Problems to be solved by the device]

However, in the printer described above, both fitting holes 15A, 15B and both holding holes formed in the covers 12A, 12B of the ink rolls 11A, 11B for mounting the respective ink rolls 11A, 11B on the holding shafts 10A, 10B Since the shafts 10A and 10B have the same shape, the red holding shaft 10A is equipped with the black ink roll 11B, and the black holding shaft 10B is fitted with the red ink roll 11A. Therefore, the ink rolls 11A and 11B of different colors may be mistakenly attached to the holding shafts 10A and 10B. Then, the ink sponges 13A, 13B of the ink rolls 11A, 11B are applied to each of the character bodies 5 of the character belt 6 that is originally applied only with a single color ink. There is a risk that the color inks are applied, the colors of the inks are mixed, and the printing becomes very dirty.

The present invention provides an ink roll mounting structure that solves the above-mentioned problems of the conventional ones, prevents accidental mounting of ink rolls of different colors, and reliably prevents ink color mixing. The purpose is to do.

[Means for Solving the Problems]

In order to achieve the above-mentioned object, the ink roll mounting structure according to the present invention has a plurality of ink rolls, each of which has an ink sponge impregnated with an ink of a different color and is rotatably held on the cover. In an ink roll mounting structure in which a holding shaft for each ink roll protruding from the printer main body side is inserted and held in a fitting hole, the holding shafts are formed in mutually different shapes and The hole is formed in a shape in which only the holding shaft of the corresponding ink roll can be completely inserted.

[Action]

According to the present invention having the above-described structure, the holding shafts of the respective ink rolls are formed in different shapes, and the fitting holes are formed in such a shape that only the holding shafts of the corresponding ink rolls can be completely inserted. Therefore, even if an ink roll that does not correspond to a certain holding shaft is to be mounted, the holding shaft and the shape of the fitting hole of the ink roll cannot match, and therefore, an ink roll that does not correspond cannot be mounted. As a result, it is possible to reliably prevent erroneous mounting of the ink rolls, it is possible to prevent color mixture of inks of different colors caused by erroneous mounting of the ink rolls, and it is possible to perform clean multi-color printing.

〔Example〕

 Hereinafter, the present invention will be described with reference to the embodiments shown in the drawings.

FIG. 1A shows a holding shaft 10A for red as an example, which is provided on the frame 1 on the printer body side so as to project upward. A base portion 16A is formed at the lower end of the holding shaft 10A, and a large diameter shaft portion 18 is formed at the upper end of the base portion 16A via an annular step portion 17A. Further, a small-diameter shaft portion 20 is formed on the upper end of the large-diameter shaft portion 18 via an annular step portion 19.
On the other hand, the red ink roll 1 mounted on this holding shaft 10A
1A has a fitting hole 15A formed in its cover 12A, and a large-diameter shaft portion 18 of a holding shaft 10A is relatively densely formed in a lower portion of the fitting hole 15A as shown in FIG. 1B. Large diameter part 21 that can be inserted
A small diameter portion 23 into which the small diameter shaft portion 20 of the holding shaft 10A can be inserted relatively densely is formed above the large diameter portion 21 via an annular step portion 22.

In addition, the black holding shaft 10B is, as shown in FIG. 2B,
Like the holding shaft 10A, it is provided on the frame 1 of the printer so as to project upward, but its shape is different from the holding shaft 10A. That is, a base portion 16B is formed at the lower end of the holding shaft 10B, and a total of the large-diameter shaft portion 18 and the small-diameter shaft portion 20 of the holding shaft 10A is provided at the upper end of the base portion 16B via an annular step portion 17. A shaft portion 24 having a length substantially equal to the length is formed.
On the other hand, the black ink roll 1 mounted on the holding shaft 10B
The cover 12B of the 1B has a fitting hole 15B formed therein, and the fitting hole 15B is composed of a cylindrical portion 25 into which the shaft portion 24 of the holding shaft 10B can be inserted relatively densely.

Further, in the present invention, particularly, the outer diameter of the large diameter shaft portion 18 of the holding shaft 10A and the large diameter portion of the fitting hole 15A of the ink roll 11A.
The inside diameter of 21 is a, the outside diameter of the small diameter shaft portion 20 of the holding shaft 10A and the inside diameter of the small diameter portion 23 of the fitting hole 15A of the ink roll 11A are b, the outside diameter of the shaft portion 24 of the holding shaft 10B and the ink roll, respectively. If the inner diameter of the fitting hole 15B of 11B is c, then a>
The relationship of c> b is satisfied.

In addition, in FIG. 1B and FIG. 2B, the covers 12A, 12
B is the same as the conventional ink sponge 13A, 13B is rotatably supported by the ink bobbins 14A, 14A, 14B, 14B, of which the ink sponge 13A is impregnated with red ink, In addition, the ink sponge 13B,
Black ink is infiltrated. Further, knobs 26A and 26B are formed on the covers 12A and 12B of the ink rolls 11A and 11B, respectively.

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

First, as shown in FIG. 3, when a red ink roll 11A is also attached to the red holding shaft 10A, the holding shaft 10A
The large-diameter portion 21 of the fitting hole 15A is relatively tightly fitted to the large-diameter shaft portion 18 of, and the small-diameter portion 23 of the fitting hole 15A is relatively tightly fitted to the small-diameter shaft portion 20 of the holding shaft 10A. Do Ink Roll 11
A is stably attached to the holding shaft 10A. Similarly, as shown in FIG. 4, when the black ink roll 11B is also attached to the black holding shaft 10B, the cylindrical portion 25 of the fitting hole 15B is compared with the shaft portion 24 of the holding shaft 10B. The ink roll 11B is stably mounted on the holding shaft 10B so as to be closely fitted.

On the other hand, as shown in FIG. 5, when a black ink roll 11B is adhered to the red holding shaft 10A, the outer diameter b of the small diameter shaft portion 20 of the holding shaft 10A is a fitting hole for the black ink roll 11B. Since it is smaller than the inner diameter c of 15B, it is possible to insert up to the small diameter shaft portion 20 on the tip side of the step portion 19 of the holding shaft 10A, but the outer diameter a of the large diameter shaft portion 18 of the holding shaft 10A is black. Since the inner diameter c of the fitting hole 15B of the ink roll 11B is larger, the holding shaft 10A cannot be inserted into the fitting hole 15B. On the contrary, as shown in FIG. 6, when the red ink roll 11A is attached to the black holding shaft 10B, the red ink roll 11A
Holding shaft 10B for which inner diameter a of large-diameter shaft portion 18 of fitting hole 15A is black
Since the shaft portion 24 can be inserted up to the annular step 22 of the fitting hole 15A of the red ink roll 11B, the smaller diameter portion of the fitting hole 15A of the red ink roll 11A can be inserted. twenty three
Since the inner diameter b of the holding shaft 10B is smaller than the diameter c of the black holding shaft 10B, the holding shaft 10B cannot be inserted into the fitting hole 15A any more.

As described above, according to this embodiment, the holding shafts 10A, 10 of different colors are
B has a shape different from each other, and the fitting holes 15A, 15B of the ink rolls 11A, 11B into which the respective holding shafts 10A, 10B are inserted are also different shapes according to the corresponding holding shafts 10A, 10B. Therefore, the ink rolls 11A and 11B of different colors cannot be mounted on the holding shafts 10B and 10A. Therefore, the ink roll 11
It is possible to reliably prevent erroneous mounting of A and 11B, and as a result, it is possible to prevent a situation in which the ink is mixed and the printing is stained due to erroneous mounting of the ink rolls 11A and 11B.

In the above-described embodiment, two ink rolls are used.
Although the mounting of 11A and 11B has been described, it goes without saying that the present invention can be applied to mounting of three or more ink rolls. Further, the present invention can be modified in other ways as necessary.

[Effect of device]

As described above, according to the ink roll mounting structure of the present invention, even if an ink roll that does not correspond to the holding shaft is mounted, the shape of the fitting hole of the ink roll of the holding shaft is different and the ink roll is mounted. Because I can't
It is possible to reliably prevent erroneous mounting of the ink rolls, and as a result, it is possible to prevent color mixture of inks and perform beautiful multi-color printing.

[Brief description of drawings]

1 to 7 show an embodiment of an ink roll mounting structure according to the present invention. FIG. 1A is a front view of a holding shaft for red, and FIG. 1B is one of a red ink roll. Partial sectional front view, FIG. 2A is a front view of a holding shaft for black, and FIG. 2B.
Is a partial cross-sectional front view of a black ink roll, FIG. 3 is a partial cross-sectional front view of a state where a red ink roll is attached to a red holding shaft, and FIG. 4 is a black ink on a black holding shaft. Partial cross-sectional front view with the roll mounted, Fig. 5 is a partial cross-sectional front view with the black ink roll trying to mount the red ink holding shaft, and Fig. 6 is red with the black holding shaft. Partial sectional front view of the state where you tried to install the ink roll of
FIG. 7 is a plan view showing a conventional micro printer. 1 ... Frame, 5 ... Typeface, 6 ... Type belt, 10A, 10B
... holding shaft, 11A, 11B ... ink roll, 12A, 12B ... cover,
13A, 13B ... Ink sponge, 15A, 15B ... Fitting hole, 18 ... Large diameter shaft portion, 20 ... Small diameter shaft portion, 21 ... Large diameter portion, 23 ... Small diameter portion, 24 ... Shaft portion, 25 ... Cylindrical portion.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-58-33488 (JP, A) JP-A-63-39556 (JP, A) Actually open Sho-53-103308 (JP, U) Actual-open Sho-57- 41758 (JP, U) Actual opening 56-168361 (JP, U) Actual opening 55-148963 (JP, U)

Claims (1)

[Scope of utility model registration request] 1. A plurality of ink rolls, each of which has an ink sponge impregnated with an ink of a different color and which is rotatably held by a cover, are provided in a fitting hole formed in each cover so as to protrude toward the printer body. In an ink roll mounting structure in which a holding shaft for each ink roll is inserted and held, each holding shaft is formed in a shape different from each other, and only the holding shaft of the ink roll corresponding to each fitting hole is completely formed. An ink roll mounting structure characterized in that it is formed into a shape that can be inserted into.