JPH0541833U - Ink ribbon cassette - Google Patents

Abstract

(57) [Summary] [Object] To correct the imbalance in the drawing operation of the ink ribbon when the ink ribbon is drawn from the storage unit in the ink ribbon cassette, and prevent the occurrence of multiple drawing of the ink ribbon. [Structure] Three or more weirs 9 each having a length are arranged in parallel on the outlet side of a storage portion 2 for an ink ribbon 3 at intervals.
A plurality of ink ribbon passages 11 partitioned by 0 were formed.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an ink ribbon cassette containing an endless ink ribbon used in printers, typewriters, and the like.

[0002]

[Prior Art]

 The endless ink ribbon is nipped by the rotation of the drive wheel and the driven wheel to be sent to the ink ribbon storage section, and the ink ribbon cassette is drawn out from the storage section by the both wheels and circulates. It is well known that in such an ink ribbon cassette, in order to prevent the occurrence of multiple withdrawal from the ink ribbon storage section and the occurrence of imbalance in the ink ribbon withdrawal operation, etc. JP-B-57-9954 discloses an ink ribbon cassette in which a plurality of conical or cylindrical projections are provided at equal intervals in the vicinity of the outlet opening.

[0003]

[Problems to be solved by the device]

 It is recognized that the ink ribbon cassette with the conical or columnar protrusions provided at equal intervals near the outlet opening of the ink ribbon storage portion contributes to correcting the imbalance of the ink ribbon withdrawal operation. It was confirmed that it is difficult to say that the prevention of multiple drawing out of the ink ribbon is perfect. The occurrence of multiple withdrawal of the ink ribbon occurs when the ink ribbon is sandwiched between the drive wheel and the driven wheel and is sent to the ink ribbon storage section, and is stored in the ink ribbon storage section in a folded state. It seems that it is not possible to artificially change the folded state of the ink ribbon in the ink ribbon storage section when one of the drive wheel and the driven wheel is a gear. It is necessary to provide an ink ribbon cassette that prevents the ink ribbon from being jammed and stuck due to multiple withdrawal regardless of the folded state of the ink ribbon. Therefore, it is an object of the present invention to provide an ink ribbon cassette that does not cause imbalance in the drawing operation of the ink ribbon when the ink ribbon is pulled out from the ink ribbon storage portion and does not cause multiple drawing. .

[0004]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, this invention sandwiches an endless ink ribbon by a rotation of a driving wheel and a driven wheel and feeds it to the ink ribbon, and at the same time, the ink ribbon is pulled out from a storage portion and circulated by the both wheels. In the ink ribbon cassette, a plurality of weirs each having a length are arranged side by side on the ink ribbon outlet side of the ink ribbon storage portion at intervals of three or more to form a plurality of ink ribbon passages partitioned by weir walls. It is an ink ribbon cassette.

In the present invention, the weir having the length provided is preferably provided at the bottom of the ink ribbon cassette, but it may be provided at both the lid and the bottom of the ink ribbon cassette.

When the weir having the length provided in the present invention is provided at both the bottom and the lid of the ink ribbon cassette, the weir having the length provided at the bottom is located directly above the weir as shown in FIG. , It may be provided so that there is a weir having the length provided on the lid, or as shown in FIG. 5, the weir provided at the position not directly above the weir having the length provided on the bottom It may be provided that there is a weir having a length.

The weir having a length provided in the present invention has a shape shown in FIG. 2 as a plane and as a side view in FIG. 3 as an example, and the weir having this length accommodates a cassette. In this section, the higher height is on the inside of the storage part, that is, the drive wheels and driven wheels, and the lower height is on the outlet side of the storage part. There is no problem if the shape of is not a shape having a difference in height.

The driving wheel and the driven wheel for feeding and pulling out the ink ribbon used in the present invention are not limited to those having smooth surfaces for holding the ink ribbon, and the driving toothed wheel and the driven wheel meshing with the driving toothed wheel. It may be configured with a gear.

[0009]

【Example】

 FIG. 1 is a plan view of an ink ribbon cassette without a lid showing an embodiment of the present invention, FIG. 2 is a plan view showing an example of a weir having a length used in the present invention, and FIG. 3 of FIG. FIGS. 4 and 5 are longitudinal side views of the ink ribbon cassette showing an example of the installation of the weir when the weir having a length is provided on both the lid and the bottom. Reference numeral 1 is an ink ribbon cassette body, 2 is a storage portion of the ink ribbon 3 in the ink ribbon cassette body 1, 4 is an ink ribbon inlet of the ink ribbon cassette body 1, 5 is an ink ribbon outlet of the ink ribbon cassette body 1, and 6 Is a drive wheel provided on the ink ribbon inlet 4 side of the storage section 2, and 7 is a driven wheel which contacts the drive wheel 6 and is rotated by the rotation of the drive wheel 6. And the driven wheel 7 sandwich the ink ribbon 3 and feed the ink ribbon 3 from the ink ribbon inlet 4 into the storage section 2. The fed ink ribbon 3 is complicatedly folded immediately after being fed, and is randomly meandered and packed in the storage portion 2.

On the other hand, the feeding of the ink ribbon 3 by the drive wheel 6 and the driven wheel 7 also serves as the pulling-out of the ink ribbon 3 packed in the storage section 2. The ink ribbon 3 is stored in the storage section 2-ink ribbon outlet 5 -Ink ribbon inlet 4-Driving wheel 6, driven wheel 7-Storing section 2 circulates. Reference numeral 8 denotes a guide roll provided at a desired position on the traveling path of the ink ribbon 3. These things are similar to the conventional ribbon cassette, but in this invention, weirs 9 having a length are arranged side by side on the outlet side of the ink ribbon 3 of the storage section 2 at intervals of 3 or more. It is characterized in that a plurality of ink ribbon passages 11 and 11 'partitioned by the above are formed. The weir 9 having this length has such a shape that its flat surface is shown in FIG. 2 and its side surface is shown in FIG. 3. As shown in FIG. 1, the taller one is located inside the storage part 2. In addition, three or more are arranged side by side at the exit side of the storage section 2 with a space therebetween such that the lower one is on the side of the ink ribbon exit 5 and are partitioned by the weir wall 10. The ink ribbon passage 11 is formed. In FIG. 1, five weirs 9 each having a length are arranged side by side, and four ink ribbon passages 11 are formed. Although 12 is an outlet opening, this may or may not be provided.

Although FIG. 1 shows the case where the weir 9 having a length is provided on the bottom 13 of the ink ribbon cassette body 1, it may be provided on both the bottom 13 and the lid 14, and in this case, FIG. As shown, the weir 9 having the length provided on the lid 14 may be provided directly above the weir 9 having the length provided on the bottom 13, or as shown in FIG. In addition, the weir 9 having the length provided in the lid 14 may be provided at a position not directly above the weir 9 having the length provided in the bottom 13.

[0012]

[Effect of the device]

 Since the present invention is configured as described in detail above, the tip of the weir 9 having a length provided in parallel at an interval of 3 or more in the storage portion is complicatedly folded in the storage portion. The entanglement of ink ribbons that are rarely entangled with each other is unraveled, loosened, and smoothly linearized, so that the ink ribbon withdrawal operation is performed evenly. The ink ribbon drawn through the passage is blocked by the weir wall and extends to the adjacent ink ribbon passage even if there is an ink ribbon extending to the adjacent ink ribbon passage. There is no need to do so-called multiple withdrawal by entwining together. The conventional ink ribbon cassette, which has a plurality of pillar-shaped projections at the outlet of the storage unit to temporarily stop the flow of the ink ribbon, is a pillar-shaped projection when the ink ribbon is pulled out. Therefore, the ink ribbon that is pulled out from between the pillars is in a state where it can freely come into contact with the ink ribbon that extends between other pillars when there is one. Although it was unavoidable that the so-called multiple draw-out was caused by being entangled with the extended ink ribbon, this invention did not cause such multiple draw-out.

[Brief description of drawings]

FIG. 1 is a plan view of an ink ribbon cassette without a lid, showing an embodiment of the present invention.

FIG. 2 is a plan view showing an example of a weir having a length used in the present invention.

FIG. 3 is a side view of the one shown in FIG.

FIG. 4 is a vertical cross-sectional view of an ink ribbon cassette showing an example of an arrangement of weirs when a weir having a length is provided on both a lid and a bottom.

FIG. 5 is a vertical cross-sectional view of an ink ribbon cassette showing another example of the arrangement of weirs when a weir having a length is provided on both the lid and the bottom.

[Explanation of symbols]

 1 Ink Ribbon Cassette Main Body 2 Storage Section 3 Ink Ribbon 4 Ink Ribbon Inlet 5 Ink Ribbon Outlet 6 Drive Wheel 7 Driven Wheel 8 Guide Roll 9 Weir with Length 10 Weir Wall 11 Ink Ribbon Passage 12 Outlet Opening

Claims (1)

[Scope of utility model registration request] 1. An ink ribbon cassette in which an endless ink ribbon is sandwiched by a drive wheel and a driven wheel and is sent to an ink ribbon storage portion, and the ink ribbon is pulled out from the storage portion and circulated by the both wheels. An ink ribbon cassette characterized in that a plurality of weirs each having a length are juxtaposed on the ink ribbon outlet side of the storage portion at intervals of three or more to form a plurality of ink ribbon passages partitioned by weir walls.