JPH0349979A - Typewriter possible to mount correction ribbon - Google Patents

Abstract

PURPOSE:To simply mount a correction ribbon by mounting an arm member supporting one of the mounting parts of the supply and taking-up spools of the correction ribbon at a spool replacing position above the setting position near to a platen in a revolvable manner. CONSTITUTION:The supply spool 34 of a correction ribbon 32 is supported by a ribbon holder 26 through an arm member 38 and the arm member 38 is supported at one end part thereof so as to be revolvable in the direction vertical to the ribbon holder 26 by the shaft 40 parallel to a platen 2. A supply spool mounting part 42 is formed to the free end of the arm member 38 and the correction ribbon supply spool 34 is mounted to the spool mounting shaft 44 of said mounting part 42. When the correction ribbon 32 is replaced, the arm member 38 is sprung up to a spool replacing position and the supply spool 34 is fitted in the mounting part 42 from the oblique rear and the drawn-out correction ribbon 32 is passed through the ribbon guide part 46 of the leading end of the arm member. By this method, the platen 2 does not become an obstacle when the supply spool 34 is mounted and the ribbon is turned and the spool can be easily replaced.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a typewriter in which a printing ribbon and a correction ribbon are mounted on a carriage that is moved along a platen, and in particular a typewriter in which a correction ribbon spool is mounted. The present invention relates to an improvement in the structure of a spool mounting part for use in a vehicle.

[Prior Art] In the above-mentioned typewriter, when a mistake occurs in printing using a printing ribbon, it is possible to erase the mistake using a correction ribbon and correct the incorrect printing. The print ribbon is generally housed in a print ribbon cassette and mounted on the carriage. In addition, the correcting ribbon is generally equipped with a supply spool and a take-up spool mounted on a carriage so that they can rotate around one axis. For example, Utsukai Sho 62-70957
As described in the publication, the carriage is provided with a ribbon holder that can rotate in the vertical direction, a printing ribbon cassette is attached to this, and correction ribbon is supplied and taken up on both sides of the ribbon holder. each spool is attached, and the path of the printing ribbon on the platen side is positioned below the printing line, and when printing, the ribbon holder rotates to the printing position and the printing ribbon faces the platen, making corrections. During operation, the ribbon holder is rotated further upward to the correction position to place the correction ribbon opposite the platen.

By the way, when attaching the correction ribbon supply spool and take-up spool to the carriage side, the correction ribbon is wound around the supply spool, and the end of the correction ribbon pulled out from this is fixed to the take-up spool. However, it is necessary to route both such spools along the platen and attach them to each other.

[Problem to be Solved by the Invention] When attaching the supply spool and take-up spool of the correction ribbon, since the correction ribbon path is close to the platen, it is necessary to attach the correction ribbon while passing it through a ribbon guide near the platen. In some cases, the platen becomes an obstacle that makes installation difficult. For example, in recent typewriters, in addition to the printing head (first printing section),
There is a typewriter that is equipped with a dot matrix pattern print head (second printing section) and is capable of printing characters that are not found in type, as well as graphics and the like.

In this type of typewriter, a second printing part such as a dot head is provided on the carriage at a certain distance from the first printing part of type. The installation process becomes more complicated because the supply or take-up spool must be installed, and the installation location is typically close to the platen.

An object of the present invention is to make it easier to attach a correction ribbon.

[Means for Solving the Problems] In order to solve the above problems, the typewriter according to this research has: ■ a carriage on which a printing ribbon and a correction ribbon are attached and is moved along a platen; A ribbon holder is provided and is movable to a correction position where the correction ribbon faces the platen, and a correction ribbon supply spool around which the correction ribbon is wound and a correction ribbon take-up spool which winds up the correction ribbon after use are respectively installed. a typewriter including a spool attachment part, which is provided in the ribbon holder, and rotates at least one of the two spool attachment parts around a uniaxial line between a set position close to the platen side and a spool replacement position above the set position. It is characterized in that it includes an arm member that supports the device movably.

Here, for example, when the above-mentioned dot head is provided as a second printing section on the side of the correction ribbon supply spool,
A configuration can be adopted in which only the supply spool is rotatably supported by the arm member, and if the positional relationship with the second printing section is reversed, only the take-up spool can be rotatably supported by the arm member. It is possible to take a configuration that supports this. Furthermore, in the case where both the supply and take-up spools must be mounted close to the platen, a configuration may be adopted in which both spools are rotatable by respective arm members.

[Function] According to the typewriter in which the arm member is rotatably attached to the ribbon holder in this manner, when the correction ribbon supply spool and/or take-up spool are attached to the ribbon holder, the arm member is not attached to the ribbon holder in a normal manner. By rotating the spool from the set position to the upper spool replacement position, the spool mounting portion moves away from the platen. Therefore, the platen does not become an obstacle when attaching or handling the correction ribbon spool.
The correction ribbon spool can be attached easily and quickly.

[Example] Embodiments of the present invention will be described below based on the drawings.

FIGS. 1 and 2 show a printing mechanism of a typewriter according to an embodiment of the present invention. In the figure, 2 is a platen, which can be rotated by an arbitrary angle in both forward and reverse directions by a platen drive motor (not shown). A carriage 8 is provided to reciprocate along this platen 2 by a carriage drive motor (not shown), and its movement is guided by two guide bars 10.12. The carriage 8 is provided with a petal-shaped type wheel 14 having a large number of type elements on its outer periphery in close proximity to the platen 12, and a type selection motor 16 at its center.
The motor shaft 18 is connected to the motor shaft 18 of the motor. This type wheel 1
Hammer 2 is located behind 4 and is driven by a solenoid.
0 is set. The hammer 20 strikes the back side of the type selected by the type selection motor 16, and a print ribbon 22 positioned between the type and the paper P performs predetermined printing on the paper P.

Note that a dot matrix type print head (hereinafter referred to as dot head) 24 that performs printing using wire dots is provided as a second print section adjacent to the first printing section composed of the type wheel 14, hammer 20, etc. ing. The dot head 24 is fixed to the carriage 8 at one side end of the carriage 8 at a fixed distance from the hammer 20 along the length of the platen 2. A dedicated printing ribbon (not shown) is used for this dot head 24.

A ribbon holder 26 is supported on the carriage 8 so as to be rotatable around a shaft 28 parallel to the platen 2 . A printing ribbon cassette 30 is mounted on the ribbon holder 26, and the printing ribbon 2 is placed inside this cassette 30.
Two take-up and two supply spools are accommodated. Further, a supply spool 34 and a take-up spool 36 for a correction ribbon 32, which will be described later, are each attached to the ribbon holder 26 so as to be rotatable around the -@ line. Here, platen 2
On the side opposite the printing ribbon 22, the correction ribbon 3
Located above 2.

The ribbon lift mechanism that rotates the ribbon holder 26 around the shaft 28 is well known and will not be illustrated or explained in detail, but it is a mechanism that attaches a lift cam having a spiral cam groove and the ribbon holder 26 upward. The lift cam has a rest position in which the printing ribbon 22 is lowered downward from the printing line, a printing position in which the printing ribbon 22 faces the printing line, and a correction ribbon 32 in the correction position facing the printing line. The ribbon holder 26 can be rotated to three positions.

Next, a structure for attaching the supply spool 34 and take-up spool 36 of the correction ribbon 32 to the ribbon holder 26 will be described.

The supply spool 34 is supported by the ribbon holder 26 via an arm member 38. As is clear from FIG. 1, the arm member 38 is supported at one end by a shaft 40 parallel to the platen 2 so as to be rotatable in the vertical direction relative to the ribbon holder 26. A supply spool mounting portion 42 is formed on the free end side of this arm member 38, and a spool mounting shaft 44 is provided on this spool mounting portion 42, on which 8 Jt of correction ribbon supply spools 34 are mounted. A ribbon guide portion 46 (a groove with a rectangular cross section) that guides the correction ribbon 32 pulled out from the supply spool 34 is formed at the tip of the arm member 38 . - On the other hand, a first stopper part 48 and a second stopper part 50 are provided at the base end of the arm member 38.
is formed integrally with the arm body. The first stopper portion 48 is formed with a rear protrusion 52 in which the arm member 38 extends further rearward than the shaft 40 , and this rear protrusion 52 engages with the leaf spring 54 . The base end of the leaf spring 54 is fixed to the ribbon holder 26, and is in contact with the rear protrusion 52 of the arm member 38 while being elastically deformed downward.

Further, the leaf spring 54 includes a portion A that is flat with respect to the rear protrusion 52 and a portion B that is bent in a concave shape. Then, when the portion A of the leaf spring 54 urges the rear protrusion 52 upward and the first stopper portion 48 is in contact with the lower surface of the ribbon holder 26, the supply spool attachment portion 42 of the arm member 38 is placed on the side of the platen 2. is held in a set position close to . On the other hand, C
Rotate clockwise (upward) so that the rear protrusion 52 of the arm member 38 is aligned with the B of the leaf spring 54 as shown in FIG. 3(b).
When the second stopper section 50 is pressed against the back surface of the ribbon holder 26, the supply spool attachment section 42 of the arm member 38 is maintained at the spool replacement position above the aforementioned set position. It has become. This rotational movement of the arm member 38 causes the supply spool mounting portion 42 to move away from the platen 2 by a certain distance.

Note that the supply spool mounting portion 42 of the arm member 38 is provided with appropriate slack prevention means such as a friction imparting mechanism or a moderation mechanism for the supply spool 34 in order to prevent slack from occurring in the drawn-out correction ribbon 32. . Further, the ribbon guide portion 46 of the arm member 38 is provided with a grip portion 60 for rotating the arm member 38 .

On the other hand, as is clear from FIG. 2, the correction ribbon 32 pulled out along the platen 2 from the supply spool 34 is
Ribbon holder 2 on the side opposite to ribbon guide section 46
The correction ribbon is rotated by 90 degrees by the ribbon guide section 56 provided at 6, and is wound onto the correction ribbon take-up spool 36 in a 90 degree twisted state. In other words, the supply spool 34
The take-up spool 36 is mounted with its center line substantially perpendicular to the platen 2, whereas the take-up spool 36 is mounted with its center line perpendicular to the take-up spool mounting portion 58 provided on the opposite side of the ribbon holder 26. It is mounted in a position parallel to the platen 2. The reason why the supply spool 34 is installed from above is that the presence of the dot head 24 makes it difficult to install it from the side.

Since the take-up spool mounting portion 58 has the same structure as the conventional one, detailed illustrations and explanations will not be given, but the structure of the shaft portion that holds the take-up spool 36 is, for example, as follows. The movement of the ribbon holder 26 when it descends from the maximum lifted correction position to the lower printing position is converted into the movement of the drive rod, and this drive rod moves the take-up spool 36.
is intermittently rotated by a constant angle in the winding direction, and rotation in the opposite direction is prevented by a ratchet structure or the like.

Now, when the correction ribbon 32 is used up and it becomes necessary to replace it with a new one, the arm member 38 can be replaced as shown in FIG.
) from the setting position shown in FIG. 3(b) to the spool replacement position shown in FIG. By passing the ribbon through the ribbon guide portion 46 at the tip, the platen 2 will not become an obstacle when attaching the supply spool 34 and handling the ribbon, and the spool can be changed easily. Note that the correction ribbon take-up spool 36 may be attached from the side as in the conventional case.

In the above embodiment, the printing ribbon is located at the rest position except during printing and correction, but the printing ribbon always prints at the printing position facing the printing line, and during correction The correction ribbon may be configured to be lifted from the bottom to the top so as to be located between the paper and the print ribbon.

Furthermore, it is not essential that the center lines of the ridges of the supply spool and take-up spool of the correction ribbon be approximately at right angles, but a configuration in which the center lines of the ridges are parallel, for example, both spools may be attached from the side. .

It goes without saying that the present invention can be implemented with various modifications based on the knowledge of those skilled in the art.

[Brief explanation of drawings]

FIG. 1 is a side sectional view of the printing mechanism of a typewriter that is an embodiment of the present invention (the main body of the carriage etc. are simplified), FIG. 2 is a perspective view of the printing mechanism, and FIG. FIG. 3(a) is a side view showing the arm member at the set position, and FIG. 3(b) is a side view showing the arm member rotated to the spool replacement position.

Claims (1)

[Scope of Claims] A carriage to which a printing ribbon and a correction ribbon are attached and moved along a platen, a ribbon holder provided on the carriage and capable of moving the correction ribbon to a correction position opposite to the platen, and a ribbon holder for moving the correction ribbon to a correction position facing the platen; A typewriter comprising: a spool mounting section to which a wound correction ribbon supply spool and a correction ribbon take-up spool for winding a used correction ribbon are respectively mounted; A typewriter to which a correction ribbon can be attached, characterized in that an arm member is provided, one of which is rotatably supported about one axis at a setting position close to the platen side and a spool replacement position above the setting position.