JPH04109159U - ink roller - Google Patents

Abstract

(57) [Summary] [Purpose] The present invention relates to an ink roller for supplying ink to the type wheel of a printer, and provides an inexpensive and long-life ink roller. [Structure] The roller fixing locking portion 1a of the roller shaft A1 and the roller fixing locking portion 3a of the roller shaft B3 compress the outer circumferential side of the roller 2 to reduce the porosity of the outer circumferential side of the roller 2.
The ink impregnated inside the roller 2 is transferred to the roller 2 by capillary action.
Move it to the outer periphery.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention is applied to printer ink rollers that supply ink to type and transfer it to recording paper. related.

0002

[Conventional technology]

Conventionally, this type of technology was developed in Utility Model Publication No. 57-9090 and Utility Model Application Publication No. 49-52605. The configuration was as shown.

0003 However, in the ink roller of Utility Model Publication No. 57-9090, the inner diameter side and outer diameter side of the roller Since the porosity is the same, even if the ink on the outer diameter side becomes low after long periods of use, the inner The ink on the radial side was difficult to move to the outer radial side, and there was a lot of ink that was not used. or, Even if the outer diameter of the ink roll is increased to extend the life of the ink roll, the ink that is not used The problem was that it was difficult to efficiently extend the lifespan just by increasing the amount of water. In addition, an ink roll made of a continuous porous material was published in 1972-52605. Discloses an ink roller with a double structure in which the porosity of the center part and the porosity of the outer part are different. However, the roll manufacturing process is difficult and it is extremely difficult to use as a consumable ink roller. The problem was that it became expensive.

0004

[Problem that the idea aims to solve]

This invention was made to solve such problems, and the purpose of this invention is is an inexpensive ink roller that increases the utilization rate of the ink impregnated in the ink roller and has a long life. The aim is to provide the following.

[0005]

[Means to solve the problem]

The ink roller of this invention includes a roller impregnated with ink and a roller that holds the roller. In an ink roller equipped with a roller shaft, the inner distance between the roller shafts is smaller than the center. It is characterized by having a pair of roller fixing supports that are narrow on the outer diameter side.

[0006]

[Effect]

According to the above structure of the present invention, the outer diameter part of the roller fixing retainer branch is narrower than the center part. Therefore, the porosity of the roller made of continuous porous material is smaller at the outer diameter side than at the center, ☆ The ink in the center comes out to the outer diameter side of the roller due to capillary action.

[0007]

【Example】

An embodiment of the present invention will be described below based on the drawings.

[0008] In this embodiment, the roller shaft has a two-piece structure of roller shaft A and roller shaft B.

[0009] FIG. 1 is a sectional view of an ink roller. In the figure, 1 is the roller axis A; 1 is formed with a roller fixing member branch 1a. Roller of roller fixing locking part 1a 2, the outer diameter portion 1e of the inner wall 1d is in the direction of the roller 2 compared to the center portion 1f of the shaft diameter D1. It is shaped like a fallen figure. 2 is manufactured from materials such as rubber and plastic. , a flexible roller made of continuous porous material with ink soaked in it. be.

0010 The roller 2 has a substantially uniform porosity before being assembled. What is porosity here? It is the ratio of the volume occupied by voids to the total volume including voids of a continuous porous body. 3 is The roller shaft B forms a roller fixing support portion 3a. Roller lock of roller shaft B3 Similarly to the inner wall 1d of the roller shaft 1, the inner wall 3d of the constant locking portion 3a with the roller 2 has an outer diameter portion. 3e is formed in a shape that is tilted toward the roller 2 compared to the center portion 3f with the shaft diameter D1. There is.

[0011] This roller shaft A1 has a hole with approximately the same length as the shaft length L1, and a hole with approximately the same diameter as the shaft diameter D1. A recess 1 formed in the roller shaft A1 incorporates the roller 2 impregnated with ink. c, press-fit the convex portion 3b formed on the ink roll shaft 2 into the ink roll shaft B. Incorporate 3.

0012 As a result of this incorporation, the rollers formed on the roller shaft A1 and the roller shaft B3 are The distance on the roller side between the fixing member branch 1a and the roller fixing member branch 3a is the distance from the outer peripheral side of the roller As the distance becomes shorter, the outer peripheral side of the roller 2 is compressed. Therefore, outside The porosity on the circumferential side is different between the inside and the outer circumference of the roller 2, and the porosity on the outer circumference of the roller 2 is different. The porosity becomes smaller. As a result, the ink impregnated inside the roller 2 is transferred to the outer periphery. When the ink on the side becomes low, it moves to the outer periphery of roller 2 due to capillary action and the outer periphery is Once filled, it can be used until there is no more ink inside. As a result, ink Improves the utilization rate of the ink impregnated in the ink roller of the printer, extending the life of the ink roller. Become.

[0013] In addition, the porosity of the outer periphery of the ink roll 2 has a specified range in order to obtain good printing quality. It's under control. If the porosity is large, a large amount of ink will be included, resulting in printing (not shown). ), a large amount of ink is transferred to the recording paper, and the transferred characters are Bleeding occurs and the print quality is not clear. Also, it is applied when the porosity is small. When the amount of ink is low, the characters become thin and, in some cases, the phenomenon of missing characters occurs. this Depending on the type material of the printer installed, transfer time, ink viscosity, etc. The range of positive porosity is regulated.

[0014] The ink roller of this invention has an appropriate porosity on the outer periphery, but the porosity on the inner periphery is increased. Because it is larger, it can impregnate more ink than conventional ink rollers. Furthermore, the life of the ink roller can be extended.

[0015] In Fig. 1, 2a is a gap on the outer periphery of the roller, 2b is a gap inside the roller, and 2c is a gap in the roller. It is la wood. It can be seen from the figure that the gap around the outer circumference of the roller is small.

[0016] In addition, the outer periphery of the roller fixing branch has a shape with an interval shorter than the length of the roller. This prevents the roller from moving laterally and further compresses the outer circumference of the ink roll. Therefore, idle rotation can be further prevented than by compressing the inner circumference.

[0017] FIG. 2 is a sectional view of an ink roller showing another embodiment of the present invention. In the diagram 4 is a roller shaft A4, and a roller fixing portion 4a is formed on the roller shaft A4. The inner wall 4d of the roller fixing locking part 4a and the roller 5 is formed in a shape that is tilted in the direction of the roller 5. It is shaped. 5 is manufactured from materials such as rubber or plastic, and is a continuous porous body. It is a flexible roller with ink soaked in it.

[0018] The difference from the previous example is that the outer periphery of the ink roller is compressed only on one side to reduce the porosity. Although it is made smaller, the same effect as the above-mentioned embodiment can be obtained.

[0019] FIG. 3 is a sectional view of an ink roller showing still another embodiment of the present invention. In the figure 7 is a roller shaft A, and a roller fixing portion 7a is formed on the roller shaft A4. . Reference numeral 9 denotes a roller shaft B, and a roller fixing support portion 9a is formed therein.

[0020] The roller fixing part 7a and the roller fixing part 9a are located near the outer periphery of the ink roller 8. It has a convex shape so as to compress the ink roller 8. The porosity is smaller than that inside the roller 8, and the same effect as in the above-mentioned embodiment can be obtained. Ru.

[0021] In this way, the outer peripheral side of the roller is compressed by the roller fixing part, and the porosity of the roller is The shape of the anchoring part changes and the capillarity is promoted, e.g. in the axial direction of the roller shaft. It can also be star-shaped, rectangular, or wave-shaped with a cutout in part when viewed from above. , so that the outer circumference of the roller is compressed, so that the outer circumference of the roller fixing part is the same as the length of the roller. A shorter interval would not depart from the spirit of the present invention.

[0022]

[Effect of the idea]

As described above, according to the present invention, the roller impregnated with ink and the roller In an ink roller equipped with a roller shaft to hold the roller shaft, the inner distance between the roller shafts is medium. By having a pair of roller fixing parts that are narrower on the outer diameter side than the core, the roller The roller fixed locking part compresses the outer circumferential side of the roller, and the porosity on the outer circumferential side of the roller is smaller than that on the inner side. The porosity also becomes smaller. This allows the ink impregnated inside the roller to be removed from the outside. When the ink on the periphery becomes low, it moves to the outer periphery of the roller due to capillary action and the outer periphery is It can be used until there is no more ink left inside the ink roll. The operating rate of the ink impregnated into the roller is increased and the life of the ink roller is extended.

[0023] Also, the porosity on the inner periphery is larger than the regulated porosity on the outer periphery of the ink roll. Since the ink roller is impregnated with more ink than a conventional ink roller, it is even more ink-filled. We were able to extend the life of the crawler.

[0024] Furthermore, a pair of roller fixing parts on the roller shaft can easily compress the outer circumferential side of the roller. This configuration makes it possible to make the porosity on the outer circumference of the roller smaller than on the inner side. The rolls themselves can have the same porosity and can be manufactured easily and at low cost. We were able to provide ink rolls at a low unit price.

[Brief explanation of 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]

1 Roller axis A 1a Roller fixing locking part 2 roller 3 Roller shaft B 3a Roller fixing locking part

Claims (1)

[Scope of utility model registration request] 1. An ink roller comprising a roller impregnated with ink and a roller shaft for holding the roller, wherein the roller shaft is a pair of rollers with an inner distance narrower on the outer diameter side than on the center portion. An ink roller characterized by having a fixing branch.