JP2543328Y2 - Ink roller - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ink roller of a printer for supplying ink to print and transferring it to recording paper.

[0002]

2. Description of the Related Art Conventionally, this kind of technology is disclosed in Japanese Utility Model Publication No. 57-90.
90, and the construction shown in Japanese Utility Model Laid-Open No. 49-52605.

However, in the ink roller of Japanese Utility Model Publication No. 57-9090, since the porosity on the inner diameter side and the outer diameter side of the roller are the same, even when the ink on the outer diameter side becomes less when used for a long time, the ink on the inner diameter side becomes less. There were many inks that were difficult to move to the outer diameter side and were not used. Further, even if the outer diameter of the roll is increased to increase the life of the ink roll, there is a problem that it is difficult to efficiently extend the life only by increasing the amount of unused ink. In addition, public utility Showa 49-526
05 discloses an ink roller having a dual structure in which the porosity of the central portion and the porosity of the outer portion are different from each other, but the roll manufacturing process is difficult, and the ink roller as a consumable ink roller is disclosed. There was a problem that it would be unsuitable and very expensive.

[0004]

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and an object of the present invention is to increase the operating rate of the ink impregnated in the ink roller at a low cost and increase the life of the ink roller. An object of the present invention is to provide an ink roller.

[0005]

The ink roller according to the present invention is a circle formed of a porous material and impregnated with transfer ink.
A cylindrical roller and the roller are mounted on the shaft, and one side of the roller
Roller shaft provided with a roller fixing and locking portion A for regulating the portion
A and a fixed roller lock that regulates the other side surface of the roller
Part B, and the roller is held together with the roller shaft A.
And a roller shaft B.
Or the outer peripheral part is more hollow than the hollow part
It is characterized by being greatly compressed .

[0006]

According to the above configuration of the present invention, the roller is located at the center.
Since the outer peripheral part is compressed more, the porous body
The porosity of the roller is smaller on the outer diameter side than on the center,
The part of the ink comes out to the outer peripheral side due to the capillary phenomenon.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings.

In this embodiment, the roller shaft has a two-body structure of a roller shaft A and a roller shaft B.

FIG. 1 is a sectional view of an ink roller. In the figure, reference numeral 1 denotes a roller shaft A, on which a roller fixing support portion 1a is formed. The inner wall 1d of the roller fixing and locking portion 1a with the roller 2 is formed such that the outer diameter portion 1e is inclined in the direction of the roller 2 as compared with the center portion 1f of the shaft diameter D1. 2 is manufactured from rubber, plastic, etc.
This roller is made of a continuous porous material, has flexibility, and is impregnated with ink.

The roller 2 has a substantially uniform porosity before being assembled. Here, the porosity is the ratio of the volume occupied by the voids to the total volume including the voids of the continuous porous body. Reference numeral 3 denotes a roller shaft B on which a roller fixing support portion 3a is formed. Like the inner wall 1d of the roller shaft 1, the inner wall 3d of the roller fixed locking portion 3a of the roller shaft B3 with the roller 2 has the outer diameter portion 3e inclined in the direction of the roller 2 as compared with the center portion 3f of the shaft diameter D1. It is molded in a shape.

A roller 2 having a length substantially equal to the shaft length L1 and impregnated with ink having a hole diameter substantially equal to the shaft diameter D1 is incorporated into the roller shaft A1, and the ink is inserted into the concave portion 1c formed on the roller shaft A1. The protrusion 3b formed on the roll shaft 2 is press-fitted, and the ink roll shaft B3 is incorporated.

A roller fixing supporting portion 1a formed on the roller shaft A1 and the roller shaft B3 by this assembling;
The outer circumferential side of the roller 2 is compressed because the distance of the roller fixing supporting portion 3a on the roller side is shorter as it is closer to the outer circumferential side of the roller. Therefore, the porosity on the outer peripheral side is
There is a difference between the inside and the outside of the roller 2, and the porosity is small on the outside of the roller 2. As a result, the ink impregnated inside the roller 2 moves to the outer peripheral side of the roller 2 by capillary action when the amount of ink on the outer peripheral side decreases, and can be sufficiently used until the outer peripheral side is filled and no ink is left inside. As a result, the operating rate of the ink impregnated in the ink roller of the ink roll is increased, and the life of the ink roller is prolonged.

The porosity of the outer periphery of the ink roll 2 is as follows:
The range is regulated to obtain good print quality. If the porosity is large, a large amount of ink is applied to the printed characters (not shown) due to the large amount of ink contained, and a large amount of ink is transferred to the recording paper, and the transferred characters are blurred and do not have clear print quality. . On the other hand, if the porosity is small, the amount of ink to be applied is small, and the character becomes thin. The range of the appropriate porosity is regulated by the type material, transfer time, ink viscosity and the like of the printer mounted in this way.

In the ink roller of the present invention, the outer peripheral side has an appropriate porosity, but the porosity on the inner peripheral side is further increased, so that more ink can be impregnated than the conventional ink roller. Life can be extended.

In FIG. 1, reference numeral 2a denotes a gap on the outer periphery of the roller;
b is a gap inside the roller, and 2c is a roller material. In the figure, it can be seen that the gap around the outer periphery of the roller is small.

Further, the outer periphery of the roller fixing support portion is formed to have an interval shorter than the length of the roller, so that the roller does not move laterally and further compresses the outer periphery of the ink roll. Idle rotation can be prevented more than the compression.

FIG. 2 is a sectional view of an ink roller showing another embodiment of the present invention. In the drawing, reference numeral 4 denotes a roller shaft A, on which a roller fixing support portion 4a is formed, and an inner wall 4d of the roller fixing and locking portion 4a with the roller 5 is formed so as to fall in the direction of the roller 5. I have. Reference numeral 5 denotes a roller made of rubber, plastic, or the like, made of a continuous porous body, having flexibility, and impregnated with ink.

The difference from the above-described embodiment is that the porosity is reduced by compressing the outer periphery of the ink roller only on one side, but the same effect as in the above-described embodiment can be obtained.

FIG. 3 is a cross-sectional view of an ink roller showing another embodiment of the present invention. In the figure, 7 is a roller shaft A
A roller fixing support 7a is formed on the roller shaft A4. Reference numeral 9 denotes a roller shaft B on which a roller fixing support 9a is formed.

The roller fixing supporting portion 7a and the roller fixing supporting portion 9a are convex so as to compress the vicinity of the outer periphery of the ink roller 8, so that the porosity on the outer peripheral side of the ink roller 8 is reduced. And an effect similar to that of the above-described embodiment can be obtained.

As described above, the outer peripheral side of the roller is compressed by the roller fixing support, the porosity of the roller is changed, and the shape of the fixing support which promotes the capillary phenomenon, for example, cut into a part when viewed from the axial direction of the roller shaft. It may be a star shape, a rectangle, or a wavy shape with a notch. If the outer periphery of the roller fixing support portion is shorter than the length of the roller so that the outer peripheral side of the roller is compressed, the gist of the present invention is Does not deviate.

[0022]

[Effect of the Invention] As described above, according to the present invention, the porous structure
Cylindrical roller that is made of a porous material and is impregnated with transfer ink.
Roller and roller, and regulates one side of the roller
A roller shaft A having a roller fixing / locking portion A
Roller fixing and locking portion B for regulating the other side portion of the roller.
A roller shaft for holding the provided roller jointly with the roller shaft A
B, and the roller is a roller fixing / locking portion A or a roller.
The outer peripheral part is larger than the hollow part by the
By being compressed, the porosity of the porous roller is
The outer diameter side is smaller than the center, and the ink in the center
It appears on the outer peripheral side due to the capillary effect. This allows the ink impregnated inside the roller to move to the outer peripheral side of the roller due to capillary action when the amount of ink on the outer peripheral side decreases and to fill the outer peripheral side so that the ink inside the roller can be sufficiently used until the ink inside runs out. The operating rate of the ink impregnated in the roller is increased, and the life of the ink roller is extended.

Further, the porosity on the inner peripheral side is larger than the porosity on the outer peripheral side of the regulated ink roll, so that more ink is impregnated than in the conventional ink roller, so that the life of the ink roller is further increased. Could be extended.

Further, a simple configuration in which the pair of roller fixing engaging portions of the roller shaft compress the outer peripheral side of the roller makes it possible to make the porosity on the outer peripheral side of the roller smaller than that on the inner side. Good porosity, easy to manufacture,
A low-cost roll can be used, and an inexpensive ink roll can be provided.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention.

FIG. 2 is a sectional view showing another embodiment of the present invention.

FIG. 3 is a sectional view showing another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Roller shaft A 1a Roller fixed locking part 2 Roller 3 Roller shaft B 3a Roller fixed locking part

Claims (1)

(57) [Scope of request for utility model registration] An ink for transfer which is formed of a porous material and which is impregnated with the ink.
Cylindrical roller and the roller are axially mounted, and one side of the roller is regulated.
A roller shaft A having a roller fixing / locking portion A to be fixed, and a roller fixing / locking portion for regulating the other side surface of the roller.
B with the roller shaft A in cooperation with the roller shaft A.
And a roller shaft B for holding the roller, wherein the roller is the roller fixing / locking portion A or a roller.
Peripheral part is compressed more than hollow part by fixed locking part B
Ink roller characterized in that it is.