JPH0624087A - Serial device - Google Patents

Abstract

(57) [Summary] [Purpose] To move the carriage and convey the sheet by the same drive source, and to convey the sheet in both forward and backward directions. [Structure] A carriage 2 that is movable by mounting a working unit for reading or recording, and a sheet conveying unit 7 that applies a conveying force to a sheet are provided, and a driving force from the same driving source 8 is applied to a carriage moving unit 9. Further, the sheet conveying means 7 is provided with a switching means 10 capable of switching transmission, and the sheet 6 can be conveyed in the forward and reverse directions according to the forward and reverse rotations of the drive source 8. [Effect] The number of parts is reduced, and in the case of a recording device, high-level recording is possible.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a serial device which scans a carriage to perform recording and reading operations. More specifically, the movement of the carriage and the conveyance of sheets such as recording materials and originals are carried out by the same drive source. It relates to a serial device adapted to do.

[0002]

2. Description of the Related Art Today, in recording devices such as word processors and printers, serial recording devices are often used because they can be easily downsized. In this serial device, a recording unit is mounted on a carriage, the carriage is scanned to record one line, and then a recording sheet is conveyed by one line by the sheet conveying unit, and the recording of the next line and the like is similarly performed. .

Further, in recent years, in addition to the recording device, a reading device in which a reading means such as a CCD is mounted on a carriage has been developed. The document is conveyed by the sheet conveying means line by line, and the carriage is scanned to describe the original. Some serial readers read information line by line.

[0004]

However, in the conventional serial device, since the carriage motor for scanning the carriage and the carrying motor for driving the sheet carrying means are respectively provided, the number of parts is reduced. However, there are problems such as increase in manufacturing cost, increase in manufacturing cost, and increase in size of the apparatus.

The object of the present invention is to solve the above-mentioned conventional problems,
An object of the present invention is to provide a serial device in which the carriage is moved and the sheet conveying means is driven by the same driving original and the sheet can be conveyed in both forward and backward directions by the sheet conveying means.

[0006]

A typical means according to the present invention for solving the above-mentioned problems is to mount a working means, a movable carriage, and a sheet conveying means for conveying a sheet member, The switching means includes a carriage moving means for moving the carriage and a switching means for selectively switching and transmitting a driving force from the same driving source to the carriage moving means and the sheet conveying means. The driving force is transmitted to the sheet conveying means so that the sheet member can be conveyed in both forward and backward directions.

[0007]

In the above means, since the carriage is moved and the sheet is conveyed by one driving source, and the sheet can be conveyed in both forward and backward directions, the recording means is used as the working means, for example. In that case, since the sheet conveyance is not limited to one direction, various recordings can be performed.

[0008]

【Example】

[First Embodiment] Next, as one embodiment of the present invention, a serial apparatus for performing a recording operation will be specifically described with reference to FIGS. 1 is a perspective explanatory view of the entire apparatus, and FIG.
3 is a schematic side view and a schematic front view of the switching means, and FIG.
6 to 6 are explanatory views of the meshing state of the switching means.

(Overall Structure) First, the overall structure of the apparatus will be described. An ink ribbon cassette 1 is detachably mounted on a carriage 2, and a recording means 3 is mounted on this carriage 2 as a working means. Also, the carriage 2
The guide sheet 4 and the one end surface 5a of the main body frame 5 are configured to be movable in the direction of arrow a in FIG. 1. The carriage 2 is moved to a desired position and the recording means 3 is driven, so that the recording sheet 6 is formed. The recording sheet 6 on which one line has been recorded is conveyed by the sheet conveying means 7 in the direction of arrow b.

The carriage 2 is constructed so as to be movable by a carriage moving means 9 which is connected to a motor 8 which is a driving source through a gear. Further, the sheet conveying means 7
The driving force of the motor 8 is switched and transmitted by the switching means 10 to the platen roller 7a constituting the.

Next, the structure of each of the above parts will be described. (Carriage) The carriage 2 has the recording means 3 mounted thereon and the ink ribbon cassette 1 is loaded and moved. A hook 2b rotatable about an axis 2a is provided on both sides of the carriage 2, and the hook 2b is biased by a tension spring 2c to lock the positioning boss 1a of the ink ribbon cassette 1 to the hook 2b. Then, the ink ribbon cassette 1 is pressed against and fixed to the upright wall 2d of the carriage 2, and the ink ribbon 1c exposed from the cassette recess 1b at this time is a type wheel 3 described later.
It is arranged so as to be located between a and the recording sheet 6.

The winding shaft 2 is provided at a predetermined position of the carriage 2.
When the ink ribbon cassette 1 is loaded on the carriage 2, the drive transmission roller 1d moves the take-up shaft 2e.
Is configured to be fitted and locked. This winding shaft 2e
Is connected to a ribbon motor (not shown), and the ink ribbon 1c is wound on the take-up spool by driving the motor.

The carriage 2 is slidably fitted to a guide shaft 4 attached to the body frame 5, and the guide shaft 4
And is attached so as to be movable along the frame end 5a.

(Recording Means) In this embodiment, the recording means 3 for performing recording work is used as the working means. This recording means 3 uses a daisy type element in this embodiment, and a hammer 3c operated by a type wheel 3a and a solenoid 3b (not shown) is mounted on the carriage 2.

The type wheel 3a is formed by arranging the type characters in a radial pattern around the rotation axis, and is configured to rotate when a wheel motor 3d connected to the rotation axis is driven. Therefore, by rotating the type wheel 3a to make the desired type face the hammer 3c and driving the hammer 3c to strike the ink ribbon 1c with the desired type, the recording sheet 6 having the back surface supported by the platen roller 7a. To be printed on.

(Sheet Conveying Means) As shown in FIG. 1, the sheet conveying means 7 is located at a position opposite to the operation axis of the hammer 3c and in the moving area of the carriage 2 the platen roller 7 is provided.
a is provided, and the platen roller 7 a is configured to rotate by the driving force from the carriage motor 8. A guide plate 7b is attached around the platen roller 7a, and the roller 7a
A number of pinch rollers 7c are attached to the and so as to come into pressure contact with each other.

Therefore, when the platen roller 7a is driven and rotated, the recording sheet 6 is guided by the guide plate 7b in cooperation with the pinch roller 7c, and passes through between the platen roller 7a and the ink ribbon 1c, and the arrow b in FIG. Is conveyed in the direction.

A manual knob 7e is attached to one side of the shaft 7d of the platen roller 7a, and a platen gear 7f is attached to the other side of the shaft 7d. A detent mechanism is provided on the gear 7f. In this detent mechanism, a detent portion is formed on the platen gear 7f, and a detent lever 7h biased by a tension spring 7g is engaged with a valley portion of the detent portion. As a result, the platen roller 7a rotates in the unit of the tooth spacing of the detent portion. That is, the transport unit of the recording sheet 6 is determined by the detent unit. Further, the detent mechanism prevents the platen roller 7a from rotating unnecessarily even if the clutch described later is disengaged and the platen roller 7a becomes rotatable.

(Carriage moving means) The carriage moving means 9 moves the carriage 2 along the guide shaft 4. In this embodiment, a timing belt 9c is stretched between a drive pulley 9a and a driven pulley 9b. The belt 9c is connected to the carriage 2. A gear 9e is attached to the pulley shaft 9d of the drive pulley 9a, and the gear 8a of the motor 8 meshes with the gear 9e. As a result, the carriage 2 reciprocates along the guide shaft 4.

(Switching Means) This switching means 10, as shown in FIGS. 1 to 4, has a bevel gear 10a attached to a pulley shaft 9d, and a bevel gear 10b supported by a frame 5 meshes with the gear 10a. It is configured to transmit the driving force of the motor 8 in the perpendicular direction. Further, a clutch is attached to the gear shaft 10c of the bevel gear 10b. This clutch has a structure in which the serration gear 10 is attached to the gear shaft 10c.
and the clutch gear 10e is fixed to the gear shaft 10c.
Is mounted so as to be slidable in the axial direction and rotatable with respect to the rotation direction, and both gears 10d and 10e are urged by a pressing spring 10f provided therebetween.

As shown in FIG. 4, the clutch gear 10e comprises a gear portion 10e1 and a collared disc portion 10e2, and four teeth 10e3 are provided on the inner circumference of the collar. Further, the serration gear 10d can be fitted into the disc portion 10e2, and at this time, the teeth 10d1 of the serration gear 10d and the teeth 10e3 of the clutch gear 10e mesh with each other.

Therefore, when the two gears 10d and 10e are separated from each other, even if the motor 8 is driven, the serration gear 10d only rotates and the driving force thereof is not transmitted to the clutch gear 10e. On the other hand, when the clutch gear 10e slides in the direction of arrow c in FIG. 4 and the teeth 10d1 and 10e3 of both gears 10d and 10e mesh with each other, the driving force of the motor 8 is transmitted from the serration gear 10d to the clutch gear 10e, and both gears 10d. , 10e rotate integrally.

An intermediate gear 10g meshes with the gear portion 10e1 of the clutch gear 10e, as shown in FIG.
The platen gear 7f fixed to the roller shaft 7d of the platen roller 7a meshes with g. Therefore, when the driving force of the motor 8 is transmitted to the clutch gear 10e, the platen roller 7a rotates, and when the driving force transmission is interrupted, the platen roller 7a does not rotate.

Switching of the clutch is performed by a solenoid. Specifically, as shown in FIGS. 5 and 6,
A solenoid 10h is attached to the body frame 5, and the solenoid lever is turned on / off by turning on / off the solenoid 10h.
10i rotates about the axis 10j. And solenoid 10h
When is off, as shown in Fig. 5, the spring 10
By pressing f, the clutch gear 10e becomes a serration gear.
Separated from 10d, teeth 10d1 and 10e3 do not mesh. on the other hand,
When the solenoid 10h is turned on, the solenoid 10h attracts the solenoid lever 10i as shown in FIG.
i presses the clutch gear 10e. As a result, the clutch gear 10e slides and the teeth 10e3 and the serration gear 10e3.
The 10d tooth 10d1 meshes.

When the motor 8 is driven with the solenoid 10h turned on, the platen roller 7a rotates to convey the recording sheet 6, but since the serration gear 10d and the clutch gear 10e are meshed with teeth 10d1 and 10e3. ,
The forward / reverse rotation of the motor 8 is reliably transmitted to the platen roller 7a via the serration gear 10d and the clutch gear 10e. Therefore, by driving the motor 8, the platen roller 7
It is possible to feed the recording sheet 6 in the reverse direction by rotating the platen roller 7a in the reverse direction, as well as feeding the recording sheet 6 in the forward direction by rotating a normally.

For example, as shown in FIG. 7, the engagement between the serration gear 10d and the clutch gear 10e can be changed as shown in FIG.
When the ratchet teeth are formed on the facing surfaces of d and 10e, the rotational force transmission from the serration gear 10d to the clutch gear 10e is limited to one direction, and the recording sheet 6 is also conveyed in the conveying direction. It is limited to one direction. Further, if the ratchet teeth are changed to chevron-shaped teeth to transmit the bidirectional rotation to the clutch gear 10e, the solenoid 10h must be upsized in order to maintain the meshed state, which increases the manufacturing cost.

On the other hand, in this embodiment, the teeth 10d1 provided on the outer circumference of the serration gear 10d and the clutch gear
Since the teeth 10e3 provided on the inner circumference of the flange of 10e mesh with each other, the platen roller 7a can be rotated in both forward and reverse directions by the motor 8 without increasing the size of the solenoid 10h.

[Other Embodiments] In the above-described first embodiment, the recording sheet 6 is driven in both forward and reverse directions by driving the motor 8 by engaging the serration gear 10d and the clutch gear 10e, which are in the relationship of external teeth and internal teeth. Although an example in which the idle gear can be conveyed is shown in FIG. 8, a method using an idle gear is shown as another embodiment. 8 is a plan view of the clutch mechanism.

In this embodiment, a bevel gear 10b which receives a driving force from the motor 8 and a serration gear 11 on its shaft 10c.
Is stuck. A clutch gear 12 is rotatably fitted on the shaft 10c, and the gears 11 and 12 have the same number of teeth on their outer circumferences.

A rotatable idle gear 13 is provided on an axis parallel to the axis 10c. The idle gear 13 is driven by the motor 8 when the solenoid 14 is off.
In order not to be transmitted to the side, the spring 15 biases the clutch gear 12 so that it is in a position meshing only with the clutch gear 12. When the solenoid 14 is turned on, the solenoid lever
When the idle gear 16 engages with both the clutch gear 12 and the serration gear 11 by the suction of 16 in the direction of the arrow to rotate, and the serration gear 11 is rotated by the drive of the motor 8, the clutch gear is integrated with this. 12 also rotates.

Even when the power of the motor 8 is transmitted to the platen roller 7a as described above, the platen roller 7a can be rotated in both the forward and reverse directions by driving the motor 8 in the forward and reverse directions. Can be transported in both directions.

Further, in the above-mentioned first embodiment, the recording means for performing the recording work using the daisy wheel recording system has been exemplified as the working means, but the recording means is not limited to this, and for example, the wire dot recording system, the ink jet system. Other recording methods such as a recording method or a thermal recording method may be used.

Further, the working means may be a reading means composed of, for example, a CCD in addition to the means for performing the recording work, and can be applied to a reading device for reading the document description information line by line by carriage scanning. is there.

The sheet conveying means also conveys the sheet 6 by the platen roller 7a which also functions as a platen in the above-described embodiment, but it may be conveyed by a roller different from the platen, and further, in the form of a roller. The present invention is not limited to this, and the sheet 6 may be conveyed by, for example, a conveyor belt or the like.

[0035]

As described above, according to the present invention, the carriage is moved and the sheet is conveyed by the same driving source, and the sheet can be conveyed in both the forward and reverse directions. Therefore, the number of parts is reduced. Not only can the cost be reduced, but when used in a recording apparatus, the recording sheet can be conveyed in both forward and backward directions to perform high-level recording.

[Brief description of drawings]

FIG. 1 is a perspective explanatory view of an embodiment in which a serial device is applied to a daisy wheel recording device according to an embodiment of the present invention.

FIG. 2 is a schematic plan view of a clutch portion.

FIG. 3 is a schematic side view of a clutch portion.

FIG. 4 is an explanatory diagram of a meshing configuration of a serration gear and a clutch gear.

FIG. 5 is an explanatory view of a clutch in an off state.

FIG. 6 is an explanatory diagram showing a clutch in an on state.

FIG. 7 is an explanatory diagram when a ratchet is used to engage the serration gear and the clutch gear.

FIG. 8 is an explanatory diagram of an embodiment using an idle gear.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Ink ribbon cassette 2 ... Carriage 3 ... Recording means 4 ... Guide shaft 6 ... Recording sheet 7 ... Sheet conveying means 8 ... Motor 9 ... Carriage moving means 10 ... Switching means 10d ... Serration gear 10e ... Clutch gear 10f ... Press spring 10h ... Solenoid 10i ... Solenoid lever

Claims (2)

[Claims] 1. A carriage having a working means mounted thereon, which is movable, a sheet carrying means for carrying a sheet member, a carriage moving means for moving the carriage, and a driving force from the same driving source. A switching means for selectively switching and transmitting to the carriage moving means and the sheet conveying means, and the switching means transmits a driving force to the sheet conveying means so that the sheet member can be conveyed in both forward and backward directions. A serial device having the above-mentioned configuration. 2. The serial device according to claim 1, wherein the working unit is a recording unit for recording on a sheet member.