JPH05193238A - Ink ribbon and base cloth therefor - Google Patents

Abstract

PURPOSE:To prevent the movement of an ink ribbon in the ribbon width direction of a running route by infiltrating ink in the base cloth for the ink ribbon having a plain weave structure wherein S twist yarns and Z twist yarns same in twist number are contained in a plurality of warp yarns. CONSTITUTION:Each of yarns 3 constituting base cloth 10 for an ink ribbon is constituted of S twist yarn 1 with a denier of about 30-70 formed by gathering single yarns 1a, 2a with a denier of about 1 such as polyester filament yarns to twist them in a right direction and Z twist yarn 2 with a denier of about 30-70 formed by gathering single yarns to twist them in a left direction in the almost same number as the S twist yarn 1. The S twist yarns 1 and the Z twist yarns 2 are arranged so as to be alternately positioned at every one yarn in the lateral direction of the ribbon. The base cloth 10 for the ink ribbon is cut in a specified width so that the direction of warp yarns 3 becomes the longitudinal direction of the ribbon and the both ends of the cut base cloth are thermally welded and ink is infiltrated in the base cloth to form an endless ink ribbon. Since this ink ribbon is hard to move in the lateral direction of the ribbon during running, the running resistance thereof can be reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ink ribbon base cloth having a plain weave design in which a plurality of warp yarns along the traveling direction and weft yarns intersecting with the traveling direction intersect with each other. The present invention relates to an ink ribbon that is held between a driving rotating body and a driven rotating body and runs by the driving rotation of the driving rotating body.

[0002]

2. Description of the Related Art Ink ribbons, for example, are formed by cutting a wide base cloth for an ink ribbon along a warp direction according to a required width to form a ribbon, and the cut portions are heat-melted to form an ear portion. At the same time, both ends are heat-melt-bonded to form an endless structure, and the endless structure is impregnated with the ink. Conventionally, this kind of endless ink ribbon has a base cloth 10 for the ink ribbon.
However, as shown in FIG. 4, it has a plain weave structure in which warp threads 3 along the running direction and weft threads 4 along the direction intersecting the running direction are crossed, and the strength as a cloth and the impregnation property of ink are In order to raise it, the warp threads 3 are twisted in a certain direction.

[0003]

An endless ink ribbon produced by using the above-described conventional ink ribbon base fabric has the warp threads twisted in the same direction, so that the ink ribbon can be held. When the driving rotating body and the sandwiching rotating body apply a running force to the ink ribbon, if the driving rotating body slips slightly with respect to the ink ribbon, the warp of the ink ribbon (running direction) is caused by the twist direction. Then, a component force for moving the ink ribbon in the ribbon width direction is generated, and the ink ribbon itself tends to relatively move with respect to the drive rotating body and the sandwiching rotating body.
In other words, due to the phenomenon in which the drive rotor around which the ink ribbon is wound slips slightly with respect to the ink ribbon while the ink ribbon is traveling, the traveling speed of the ink ribbon is faster than the rotational peripheral speed of the drive rotor. If it is slightly delayed, the ink ribbon will move relative to the peripheral surface of the drive rotor to the upper side in the ribbon traveling direction, but the warp of the warp of the ink ribbon will be in the ribbon traveling direction relative to the peripheral surface of the drive rotor. When the ink ribbon is in contact with the side closer to the bottom surface of the ribbon traveling path, the ink ribbon is in contact with the peripheral surface of the drive rotor in a direction in which contact resistance with the peripheral surface of the drive rotor decreases. This is because the ink ribbon relatively moves while trying to escape in the longitudinal direction of the existing thread, and the ink ribbon is guided in the direction of floating from the bottom side of the traveling path. In addition, when the yarns forming the warp yarns of the ink ribbon are in contact with the peripheral surface of the drive rotor along the direction closer to the bottom face of the ribbon traveling path toward the ribbon traveling direction, the ink ribbon is driven to rotate. In the direction that the contact resistance to the body surface decreases
That is, this is because the yarn that is in contact with the peripheral surface of the driving rotating body moves relatively while trying to escape in the longitudinal direction, and the ink ribbon is guided in a direction in which it makes sliding contact with the bottom surface side of the traveling path. Therefore, in any case, the running resistance of the ink ribbon increases and the driving load thereof increases, and the upper edge or the lower edge of the ink ribbon strongly contacts the ceiling surface or the bottom surface of the ribbon running path and is damaged early. In addition, the ink ribbon is not folded into a predetermined posture, which causes the ribbon clogging. The present invention has been made in view of the above circumstances, and by devising the arrangement configuration of the warp threads of the ink ribbon base fabric, the running ink ribbon can be moved in the ribbon width direction of the running path. An object is to provide a base fabric for an ink ribbon that can be suppressed.

[0004]

According to a first characteristic configuration of the present invention for solving the above-mentioned object, a plurality of warp yarns along the traveling direction and weft yarns intersecting the traveling direction intersect with each other. An ink ribbon which is impregnated with ink into a base fabric for an ink ribbon configured to have a plain weave structure, is held between a driving rotating body and a driven rotating body, and is driven by the driving rotation of the driving rotating body. The plurality of warp yarns include S twist yarns and Z twist yarns having the same or substantially the same number of twists, and the S twist yarns and the Z twist yarns are arranged in a state of being evenly or substantially evenly distributed in the ribbon width direction. The second characteristic configuration of the present invention for solving the above object is a plain weave design in which a plurality of warp yarns along the traveling direction and weft yarns intersecting the traveling direction intersect with each other. For configured ink ribbon In the cloth, the plurality of warp threads include S twist threads and Z twist threads having the same or substantially the same number of twists, and the S twist threads and the Z twist threads are evenly or substantially evenly distributed in the ribbon width direction. The point is that they are arranged in the state of being.

[0005]

Since the warp yarns forming the base fabric for the ink ribbon include the S twist yarns and the Z twist yarns having the same or substantially the same number, the yarns forming the S twist yarns and the Z twist yarns are formed. The contact direction of the yarns with the peripheral surface of the driving rotor is symmetrical to each other with respect to the line segment along the ribbon traveling direction, and the S twist yarn and the Z twist yarn are even or uniform in the ribbon width direction. Even if the drive rotor slightly slips on the ink ribbon, the ink ribbons generated due to the contact direction move in the ribbon width direction because they are arranged in a substantially even distribution. The component forces that try to force them are offset and balanced.

[0006]

Therefore, the endless ink ribbon using this ink ribbon base cloth is difficult to move in the ribbon width direction during traveling, and the bottom surface of the ribbon traveling path of the cassette case is
Abnormal contact with the ceiling surface is prevented in advance, running resistance is reduced, and its drive load can be reduced, and its upper edge or lower edge is less likely to be damaged early,
A predetermined folding force is correctly applied to the ink ribbon, and ribbon clogging is less likely to occur.

[0007]

EXAMPLES Hereinafter, examples will be described based on the present invention. [First Embodiment] FIG. 3 shows an ink ribbon cassette used in a printer (not shown) provided in a computer, a word processor, and the like, in which a box-shaped case 5a made of synthetic resin having an upper opening and an upper opening thereof are shown. An ink ribbon R is loaded in a cassette case 5 formed by combining a lid case 5b made of synthetic resin to be closed. In the cassette case 5, along the ribbon traveling path,
A ribbon storage portion 6 for storing the ink ribbon R in a folded state, a printing portion 7 for a print surface, and a ribbon storage portion that is in sliding contact with the ink ribbon R and passes through the printing portion 7 from the outlet of the ribbon storage portion 6. 6, an ink ribbon traveling direction guide portion 8 that reaches the entrance of the ink jet printer 6, and a ribbon drive portion 9 that makes the ink ribbon R travel around the ribbon storage portion 6 and the printing portion 7.
And are provided. The ribbon drive unit 9 is provided with a feed roll 11 as a drive rotary member that is driven and rotated by power from the printer side, and a sandwiching roll 12 as a driven rotary member that is driven by the printer, at the entrance of the ribbon storage unit 6. The ink ribbon R wound around the feed roll 11 is sandwiched by the sandwiching roll 12, and the drive roll of the feed roll 11 causes the ink ribbon R to be pulled out from the outlet of the ribbon storage portion 6 and guided to the guide portion 8. While being driven and driven substantially horizontally, the ink ribbon R that has passed through the printing unit 7 is stored in the ribbon storage unit 6 in a folded state while being pushed in from the entrance of the ribbon storage unit 6. The feed roll 11 is integrally provided with a rotary operation knob 13 protruding outward from the cassette case 5. By rotating the knob 13 by hand, the slack generated in the ink ribbon R can be removed. ..

The guide portion 8 is composed of a plurality of guide surfaces provided on the pair of left and right ribbon guide arms 5c and 5d so as to be in sliding contact with the ink ribbon R, and between the pair of ribbon guide arms 5c and 5d. However, the impact dot head (
(Not shown) is configured in the printing unit 7 for printing, and the ink ribbon R is sandwiched by one of the guide surfaces 8 by the leaf spring 14 to apply tension to the running ink ribbon R. Configured. FIG. 1 shows an ink ribbon base fabric 10 for forming the ink ribbon R,
The warp yarns 3 are made up of nylon multifilament yarns and polyester multifilament yarns.
S-thread 1 made from 0-70 denier and this S to the left
It is composed of Z twist yarn 2 which is approximately 30 to 70 denier by twisting approximately the same number of twists as the twist yarn 1, and in a state where the S twist yarn 1 and the Z twist yarn 2 are alternately positioned in the ribbon width direction. It is arranged. Furthermore, this ink ribbon base fabric 1
An endless ink ribbon R is produced by cutting the warp thread 3 in a predetermined width so that the direction of the warp thread 3 becomes the longitudinal direction of the ribbon, heat-melt-bonding both ends of the cut ink ribbon base fabric 10, and further impregnating the ink. It Then, as shown in FIG. 2, in the cassette case 5, the feed roll 11 holding the ink ribbon R is driven to give a running force to the ink ribbon R, and the feed roll 1
When 1 slips slightly with respect to the ink ribbon R, the ink ribbon R is in a direction in which the contact resistance at the contact portion of the warp yarn single yarns 1a and 2a with respect to the drive roll 11 with respect to the feed roll 11 decreases, that is, Thread 1a,
2a, the ink ribbon R is arranged in such a manner that the warp yarns 3 are arranged in such a manner that the warp yarns 3 and the twist yarns 1 and 2 are alternately and evenly distributed in the ribbon width direction. Therefore, the moving force of the ink ribbon R due to the yarn 1 to the ceiling surface side of the ribbon traveling route due to the S twist and the moving force of the ink ribbon R to the bottom face side of the ribbon traveling route due to the Z twist yarn 2 are It is offset by the mutual movement power.

Therefore, since the ink ribbon R using the above-mentioned ink ribbon base cloth does not easily move in the ribbon width direction during traveling, it is possible to suppress sliding contact with the bottom surface and the ceiling surface inside the cassette case 5. Therefore, the running resistance of the ink ribbon R can be reduced to reduce the driving load, and
The upper edge or the lower edge of the ink ribbon R is less likely to be damaged early, and in particular, a predetermined folding force is correctly applied to the ink ribbon R and the ribbon clogging is unlikely to occur.

[Second Embodiment] In the first embodiment, the ink ribbon base fabric 10 is woven in such a manner that the warp yarns 3 are the S yarns 1 and the Z yarns 2 are alternately arranged. It may be formed by weaving in the state of alternately arranging a plurality of the same number every two or three.

[Third Embodiment] The ink ribbon base fabric 10 is not limited to a state in which warp threads 3 and S threads 2 are arranged alternately in the same number.
Twisted yarn 1 is 2, 3, 5 yarns each, Z twisted yarn 2 is 5,
It may be formed by weaving it in a state of alternately arranging it by repeating three or two yarns. Furthermore, two groups of Z twist yarns are provided in the upper half portion of the ribbon width direction, and S twist yarns 1 in the lower half portion. It may be formed by weaving in a state of being arranged in each group.
That is, it is sufficient that the yarn 1 is twisted from the S yarn and the yarn 2 is twisted from the Z yarn in the ribbon width direction in a uniform or substantially even state.

Other Embodiments a. The weft thread 4 may use the Z twist thread 2, or the weft thread 4 and the warp thread 3 may be woven in a state in which the S twist thread 1 and the Z twist thread 2 are alternately arranged. I. The warp yarns 3 which are not twisted may be mixed in the plurality of warp yarns 3. C. The ink ribbon cassette 5 may have the ink tank 10.

It should be noted that reference numerals are given in the claims for convenience of comparison with the drawings, but the present invention is not limited to the configuration of the accompanying drawings by the entry.

[Brief description of drawings]

FIG. 1 is a partially enlarged view of a base fabric for an ink ribbon.

FIG. 2 is a conceptual diagram during running of the ink ribbon.

FIG. 3 is a plan view showing the inside of an ink ribbon cassette.

FIG. 4 is a partially enlarged view of a conventional ink ribbon base fabric.

[Explanation of symbols]

 1 S Twist Thread 2 Z Twist Thread 3 Warp Thread 4 Weft Thread 10 Ink Ribbon Base Fabric 11 Drive Rotating Body 12 Driven Rotating Body

Claims (2)

[Claims] 1. A base fabric (10) for an ink ribbon having a plain weave design, wherein a plurality of warp yarns (3) along a running direction and weft yarns (4) along a direction intersecting the running direction are crossed. An ink ribbon impregnated with ink, held between a drive rotating body (11) and a driven rotating body (12), and run by the drive rotation of the drive rotating body (11). The warp yarn (3) includes the S twist yarn (1) and the Z twist yarn (2) having the same or substantially the same number of twists, and the S twist yarn (1) and the Z twist yarn (2) are even in the ribbon width direction. Or, the ink ribbons are arranged in a substantially even distribution. 2. A base fabric (10) for an ink ribbon having a plain weave design in which a plurality of warp yarns (3) along a running direction and weft yarns (4) along a direction intersecting the running direction intersect with each other. The plurality of warp threads (3) have the same or substantially the same number of twists as the S twist thread (1) and the Z twist thread (2).
And the S twist yarn (1) and the Z twist yarn (2)
A base fabric for an ink ribbon, in which and are evenly or substantially evenly distributed in the ribbon width direction.