JPH0441658B2 - - Google Patents

Description

TECHNICAL FIELD The present invention relates to a ribbon cassette mounting device that is convenient for mounting a ribbon cassette containing an ink ribbon in a carriage of a printing device.

Prior Art Conventionally, a ribbon cassette mounted on a carriage was simply mounted on the upper surface of the carriage. However, the ribbon (exposed portion of the ribbon) in the ribbon cassette mounted on the carriage must be placed between the platen 2 and the wheel cassette 3 containing the type wheel, for example, like the ribbon 1 shown in FIG. Must be.

For this reason, in a normal ribbon cassette 4, in order for the ribbon 1 to be guided to the position shown in the figure, the guide rollers 5 and 6 of the ribbon 1 are provided closest to the platen 2, and the guide rollers 5 and 6 are placed between the guide rollers 5 and 6. The stretched ribbon 1 must be set in the above position as it is. Therefore, the ribbon cassette 4 has a shape large enough to hold the guide rollers 5 and 6. Note that the reference numerals 7 and 7 indicate clamps on the carriage (not shown) side.
8 is a printing hammer, and 9 is a card holder.

On the other hand, the wheel cassette 3 attached to the carriage must be removed from the carriage when the type wheel is replaced. Therefore, ribbon cassette 4 or wheel cassette 3
A space 10 is provided that allows attachment and detachment of the.

However, if a space 10 is provided in the ribbon cassette 4 to allow attachment and detachment of the wheel cassette 3,
Providing the guide rollers 5 and 6 close to the platen 2 inevitably increases the size of the ribbon cassette 4 itself. This results in an increase in the size and weight of the ribbon cassette 4, and also occupies a large area of the upper surface of the carriage.

Further, the ribbon cassette 4 is configured to be adapted to a single-row type wheel and a double-row type wheel, and a ribbon cassette made to be adapted to a double-row type wheel has its guide. The roller position is before the position of the guide rollers 5 and 6 of the ribbon cassette 4 for the single-row type wheel shown in the figure (behind the cassette 3 of the same wheel).
It has a dimensional relationship located in .

Therefore, ribbon cassettes adapted for use with double-row type wheels have the problem of being inapplicable to cartridges for single-row type wheels, which have large outer dimensions.

Purpose: In view of the above-mentioned problems, the present invention aims to reduce the size and weight of a ribbon cassette mounted on a carriage, and to provide a ribbon cassette for a double-row type wheel with small outer dimensions (mainly length dimensions). We have developed a ribbon cassette mounting device that can also be used as a carriage (printing device) for ribbon cassettes for single-row type wheels with large outer dimensions, thereby improving the procurement management of ribbon cassettes. be.

Configuration Next, an apparatus according to the present invention will be described based on an embodiment shown in the drawings.

FIG. 1 is a plan view of the carriage 13 showing a state in which the setter shaft 11 connected to the type wheel (not shown) is retracted and the wheel cassette 12 is removed from the cassette holder (not shown). Note that the reference numeral 14 indicates a card holder along the platen 15, and the reference numeral 16 indicates a printing hammer.

The carriage 13 has clamps 18, 18 at both left and right ends for holding a ribbon cassette (for example, a ribbon cassette for a double-row type wheel, see FIG. 2) 17 mounted thereon, and a ribbon cassette holder 13a. At the bottom of the ribbon extension mechanism A
is placed. Then, a ribbon cassette (see FIGS. 2 and 3) 1 is placed in a part of the holder 13a.
A pusher portion 19 is provided that protrudes and descends when the device 7 is loaded.

Push section 19 in ribbon extension mechanism A
As is clear from FIG. 3, it has a pad 19a made of an elastic body at its upper end, and is pushed upward by the elasticity of a reset spring 20 provided at the bottom of the pedestal 13a. It is connected to the stud 22 of the bell crank 21.

The bell crank 21 is supported by a shaft 23 fixed to a pedestal 13a, and the upper end 21a of the bell crank 21 is supported by a pivot 24 fixed to the pedestal 13a, and is attached to a reset lever 2 which rotates in the horizontal direction.
It engages with the lever portion 25a of No. 5.

The reset lever 25 has studs 28 and 29 that connect with links 26 and 27, and is provided with an engagement hole 30 for a reset spring 20 that serves to rotate the reset lever 25 clockwise in the drawing. Note that the other end of the spring is the holder 1.
It is received by the spring receiver 31 of 3a. The reset lever 25, links 26, 27, etc. constitute a transmission means, and the transmission means is activated when detected by the detection means.

The links 26 and 27 face each other left and right and extend forward (toward the platen 15 side), and are connected to the setter shaft 1.
In both areas of 1, links 34 and 3 are attached to the extending arms 32 and 33, which are arranged opposite to each other, at positions that do not interfere with the attachment and detachment of the wheel cassette 12.
5, and are connected to each other via 5.

The projecting arms 32 and 33 are connected to pivots 36 and 37.
It is pivotally attached to the pedestal 13a. The ribbon 1 of the ribbon cassette 17 mounted on the carriage 13 is attached to the tips of the projecting arms 32 and 33.
Guide rollers 38 and 39, which can extend toward the platen 15 side, are rotatably provided. The upper ends of the guide rollers 38 and 39 are shaped like bullets. And the overhanging arm 32,
33, guide rollers 38, 39, etc. constitute a ribbon extending means, and the ribbon extending guide means is expanded from the standby position to the ribbon extending position by the operation of the transmission means, and is led out from the ribbon cassette 17 on the carriage 13. The ribbon 17a which has been stretched out is stretched out toward the platen 15 side, and the ribbon is guided at the stretched position.

In the above, when the ribbon cassette 17 is not mounted on the carriage 13, the reset lever 25 is rotated clockwise in the figure due to no load on the push section 19 and the elasticity of the reset spring 20, and the guide rollers 38, 39 are rotated clockwise. It is located in the position shown in FIG. In addition, the push section 19 is 1 shown in FIG.
It has risen to the 9U position. In this case, the rising height of the pusher portion 19 is regulated by a stopper 42 that comes into contact with the bell crank 21. Further, in this state, the guide rollers 38 and 39 are positioned inside the attachment/detachment position of the wheel cassette 12 and are on standby, so that the wheel cassette can be freely attached and detached from the cassette holder. Note that the protrusions 32a provided on the projecting arms 32 and 33,
33a are in contact with the side walls of the carriage 13 and guide rollers 38, 39, respectively, when the projecting arms 32, 33 are rotated to the deployed position shown in FIG.
It serves as a stopper to restrict the movement position of the.

On the other hand, fixed guides 40 and 41 are provided at the distal ends of the carriage 13, respectively, in the expanded position of the projecting arms 32 and 33. The fixed guides 40 and 41 are interposed in the path of the ribbon 17a (the ribbon stretched between the ribbon guides 17b and 17b in the ribbon cassette 17 and located at the initial position B) stretched out by the guide rollers 38 and 39. However, as shown in FIG. 4, it serves to prevent the ribbon from coming into contact with the case of the ribbon cassette 17 and to add tension to the ribbon.

On the other hand, the pads 43, 43 arranged on the upper surface of the carriage 13 serve to receive the ribbon cassette 17, and the upper surfaces thereof are made of an elastic material.

Next, the operation will be explained.

As shown in Figures 2 and 3, the carriage 13
The ribbon cassette 17 mounted on the ribbon cassette 17 is held by clamps 18, 18. At this time, since the carriage 13 is provided with a ribbon stretching mechanism A that is operated by the operation of the pusher section 19 that descends when the ribbon cassette 17 is loaded, the pusher section 19 is
As the bell crank 21 descends as shown in the figure, it rotates clockwise in the figure. In conjunction with this, the reset lever 25 rotates counterclockwise in FIG. 2. Then, due to the rotation of the reset lever 25, the links 26 and 27 are each extended forward, and the extension arms 32 and 33 are each expanded outward.

On the other hand, the ribbon cassette 17 mounted on the carriage 13 has a built-in ribbon cassette 17.
The ribbon 17a at the initial position b is located at the standby position as shown in FIG. 4 when the ribbon cassette 17 is mounted on the carriage 13. It is positioned in front of the guide rollers 38 and 39 (on the platen 15 side). In the above description, it is assumed that when the ribbon cassette 17 is mounted on the carriage 13, the wheel cassette 12 is taken out from the carriage 13.

Next, in this state, the ribbon cassette 1
7 pushes the pusher part 19, and the guide rollers 38, 39 located inside the ribbon 17a at the initial position B move the overhanging arms 32, 3
3, the ribbon 1 is moved to the extended position P shown in FIG. 2 with the movement shown in FIG. 4.
7a is extended.

Incidentally, the length of the stretched ribbon 17a that is insufficient to be stretched out is pulled out from the ribbon feeding side of the ribbon cassette 17.

Also, the ribbon 17a is stretched out to the stretched position P by the unfolding movement of the guide rollers 38 and 39.
are in contact with the fixed guides 40 and 41, respectively, in order to maintain proper ribbon delivery from the ribbon cassette 17. As a result, as is clear from FIG. 4, for example, the surface of the ribbon 17a pulled out from the ribbon cassette 17 is guided so as not to contact anything other than the guide portion, and
0 and 41, appropriate tension is applied to the ribbon 17a stretched out at the printing position.

In the above, the illustrated ribbon cassette 17
shows the case of a ribbon cassette for a double-row type wheel, and this ribbon cassette 17 has ribbon guides 17b, 17b located at the second position.
It is located in the position shown in the figure. On the other hand, in the case of the ribbon cassette for a single row type wheel, since its ribbon guide is arranged at the same position as the deployed position of the guide rollers 38 and 39 shown in FIG. As compared to a ribbon cassette (not shown) for a single-row type wheel, the outer dimensions in the longitudinal direction are smaller.

On the other hand, in the present invention, in the case of a ribbon cassette such as a ribbon cassette for a single row type wheel, which is large enough to allow the ribbon to be set as is on the front of the wheel cassette 12 using its own ribbon guide, Guide roller 3
8 and 39 are not required, the ribbon cassette in this case is provided with an escape to avoid being pressed by the pusher portion 19.

In the above, after loading the ribbon cassette 17 into the carriage 13, the wheel cassette 12 is inserted into the carriage 13.

Effects Since the device of the present invention is as described above, the ribbon cassette mounted on the carriage does not reach the front surface of the wheel cassette mounting position of the carriage, for example, when the outside dimension is small for a double-row type wheel. Even if the ribbon cassette has a large outer dimension, for example, the ribbon can be set in the printing device accurately for the carriage of the printing device using a ribbon cassette for a single row type wheel.

Therefore, according to the present invention, a ribbon cassette for a double-row type wheel can be applied as is to a printing device that uses a ribbon cassette for a single-row type wheel, and improvements in ribbon cassette procurement management can be achieved. .

Furthermore, by using a ribbon cassette with small outer dimensions, the space for attaching and detaching the ribbon cassette mounted on the carriage or the wheel cassette can be expanded, making handling operations thereof extremely easy.

[Brief explanation of the drawing]

FIG. 1 is an explanatory plan view of a carriage portion showing an embodiment of the present invention, FIG. 2 is an explanatory plan view showing a state in which a ribbon cassette with a small outer dimension is mounted on the same carriage, and FIG. FIG. 4 is an explanatory diagram of the ribbon extension operation, and FIG. 5 is an explanatory diagram of a conventional example in which a ribbon cassette with a large outer dimension is mounted on a carriage. . A... Ribbon extension mechanism, 13... Carriage, 15... Platen, 17... Ribbon cassette, 17a... Ribbon, 32, 33... Ribbon guide.

Claims (1)

[Claims] 1. In a ribbon cassette mounting device in which a ribbon cassette for storing ribbon is mounted on a carriage that reciprocates along a platen, when the ribbon cassette is mounted on the carriage, it is pushed down by the ribbon cassette and the mounting is carried out. a detecting means for detecting the ribbon; a transmitting means that operates when the detecting means detects the ribbon; and a transmitting means that operates when the detecting means detects the ribbon. A ribbon cassette attachment device comprising: a ribbon extending mechanism on the carriage; and a ribbon extending guide means extending toward the platen and guiding the ribbon at the extended position.