JPH073291Y2 - Recorder carriage device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention is a recorder equipped with recording means for performing dot printing or printing on recording paper by color coding according to data, and recording in the width direction of the recording paper. The present invention relates to a carriage device used for moving means.

[Prior Art] In a carriage device of a recorder, the carriage moves along a support shaft extending in the width direction of the recording paper, and the recording means is operated by the rotation of the support shaft to perform dot printing or printing on the recording paper. A groove is formed in the support shaft in the axial direction, and the carriage supports a rotation transmitter having a key that rotates coaxially with the support shaft and slides in the groove.

[Problems to be solved by the invention] By the way, in the carriage device having such a configuration, originally, the key is loosely fitted in the groove so that the carriage can be easily moved in the axial direction with respect to the support shaft. However, the inner wall of the groove actually presses the key by the rotation of the support shaft to rotate the rotation transmitter, and the inner wall of the groove and the key are in contact with each other even after the recording means is operated. When the carriage moves along the support shaft in this state, the reciprocating motion of the carriage with respect to the support shaft is rapid and the acceleration / deceleration is large, so the contact frictional resistance generated between the inner wall of the groove and the key increases the movement load of the carriage. The carriage could not be stopped at the correct position. In addition, if it is used for a long period of time, the wear and damage at this portion is further deteriorated, the durability is lowered, and precise carriage movement control cannot be performed.

Therefore, the present invention has been made in view of the above-mentioned problems, and its purpose is to focus on the clearance in the rotation direction of the support shaft between the key and the groove, and to make the backlash work within this clearance range. It is an object of the present invention to provide a carriage device of a recorder which can release the contact between the key and the inner wall of the groove and smoothly move the carriage in the axial direction after recording.

[Means for Solving the Problems] In order to achieve the above-mentioned object, a carriage device of a recorder according to the present invention has a support shaft or a rotation transmitter until the carriage after recording moves on the support shaft. In addition, backlash means for providing backlash within the clearance between the groove and the engaging portion such as the key is provided, and the contact of the engaging portion is released.

This backlash means is specifically constituted by a cam mechanism provided on the rotation transmitter side or a reverse rotation control means provided on the support shaft side.

[Operation] When the carriage moves axially on the support shaft, the backlash means releases the state in which the groove inner wall and the engaging portion such as the key are in contact with each other. The contact frictional resistance is extremely small, which allows smooth movement and improves durability.

[Embodiment] An embodiment of the present invention will be specifically described below with reference to the drawings.

In FIG. 1 and FIG. 2, reference numeral 1 is a carriage 1 equipped with a hitting means 2 and a printing means 3, and is made of a metallic support shaft 4,5.
It is supported by and can move in the axial direction. The carriage 1 is provided with metal bearings 6 and 7 on both side walls 1a and 1a, and the metal bearings 6 and 7 are supported together with the synthetic resin rotation transmitters 8 and 9 having shaft holes 8a and 9a. It is supported by the insertion of 4,5, by this, the carriage 1 supports the spindle 4,
It can be moved in the direction of the axis 5.

Further, the support shafts 4 and 5 are formed with engaging portions of grooves 4a and 5a extending in the axial direction, and the keys 10 and 11 are provided in the grooves 4a and 5a with a slight clearance C in the rotational direction. The engaging part of is inserted. These keys 10 and 11 are the shaft holes 8a and 9a of the rotation transmitters 8 and 9
It is made of synthetic resin material integrally with it, and the rotation transmitters 8 and 9 engage with the support shafts 4 and 5 to rotate coaxially.

The carriage 1 can move in the axial directions of the support shafts 4 and 5,
Any structure may be used as long as it is coaxially rotated with the rotation transmitters 8 and 9 on a one-to-one basis. For example, the support shafts 4 and 5 are semi-circular shafts and hexagonal prism shafts. The inner diameters of the rotation transmitters 8 and 9 may be engaged with each other to have the same function.

The hitting means 2 is provided with a support bracket 22 pivotally supported on the carriage by a pin 21 oriented in a direction parallel to the support shafts 4 and 5, and the support bracket 22 has a transmission shaft 23 extending in the moving direction of the recording paper. It is pivotally supported. At the tip of the transmission shaft 23, a disc-shaped dot rod 2 is provided with dot protrusions 24a on the circumferential surface at equal pitches.
4 is attached, and the pin gear 25 is attached to the rear end thereof. The pin 25a of the pin gear 25 is attached to the rotation transmitter 8 by the spiral cam 8b provided on the rotation transmitter 8.
One pitch is sent for each revolution of the pin gear 25
Is rotating.

This feed pitch matches the pitch of the dot projections 24a on the dot 24. Bevel gear 24b on the back of the dot 24
Are integrally formed with each other, and this bevel gear 24b is meshed with a bevel gear 26 axially supported on the support bracket 22 by a vertical axis. On the shaft of the bevel gear 26, an ink drum 27 having a plurality of color ink pads corresponding to the number of the dot projections 24a in the circumferential direction is attached, and each time the dot 24 is rotated, it is sent to the upper side and the dot projections are provided. The ink is supplied by bringing 24a into contact with the corresponding ink pad.

The support bracket 22 is always urged downward by a spring (not shown), and a cam follower 28 extending rearward from one side of the bracket 22 abuts on a circumferential cam 8c provided on the rotation transmitting element 8. As shown in FIG. 3 (b), it is held forward as shown in FIG. 3 (a) except that it leans forward at a required timing. At the time of this forward lean, the hitting element 24 approaches the recording paper and hits with the hitting projection 24a located on the lower side.

The printing unit 3 includes a guide pin 31 extending in the moving direction of the recording paper on the lower portion of the carriage 1, and a printing operator 32 that slides along the guide pin 31. The printing operator 32 is provided with a roller type cam follower 32a at the rear end, and the cam follower 32a is in contact with the peripheral surface of the pushing cam 9b formed on the rotation transmitter 9. This contact force is obtained by the compression coil spring wound around the guide pin 31.

A support bracket 34 is pivotally supported by a pin 33 on the print operator 32, and a print head 36 to which a plotter pen 35 is attached is provided at the tip of the support bracket 34.
The support bracket 34 is supported by a guide rod 37 extending in the width direction of the recording paper, and when the guide rod 37 is moved up and down by a cam means (not shown), it operates so as to lower the tip of the print head 36. .

In the figure, reference numeral 41 is a guide roller provided on the carriage 1, and a guide rail 4 extending parallel to the support shafts 4 and 5 is sandwiched between the guide rollers.

By the way, the rotation transmitters 8 and 9 are provided with cams 51 and 61 as backlash means, respectively.

First, the cam 51 of the rotation transmitter 8 that controls the movement of the hitting element 24 in the hitting means 2 will be described.

On the outer periphery of the cam 51, the support shaft 4 takes the fourth position with the cam 51.
When rotating in the direction of arrow A in Figure (a), the cam follow
A recess 51a is formed so that the dot 52 can be dropped and the dot 24 can be tilted forward to hit the recording paper. Also, the recess 5
A downward slope 51b is formed near 1a. As shown in FIG. 4B, the cam follower 52 is located on the descending slope 51b during the waiting period until the recording by the hitting means 2 is completed and the recording is moved to the next recording position. And due to a slight backlash on the slope of the descending slope 51b,
As shown in FIG. 2B, the contact between the groove 4a of the support shaft 4 and the key 10 of the rotation transmitter 8 is released.

Next, the outer circumference of the cam 61 of the rotation transmitting element 9 that controls the movement of the print head 36 in the printing means 3 changes so that the diameter from the center position gradually increases. The movement of the support shaft 5 is controlled by the bidirectional rotation of the support shaft 5 in the direction indicated by the arrow B in FIG.
As the cam follower 62 reciprocates within a predetermined range in accordance with the rotation of the print head 36, the print head 36 is moved in the front-back direction of the feeding of the recording paper. Further, the same downward slope 61b as the cam 51 of the hitting means 2 is formed on the outer periphery of the portion of the cam 61 which does not overlap the above-described predetermined range in which the diameter from the center is short. As shown in FIG. 5B, the cam follower 62 is positioned on the descending slope 61b during the waiting period until the print head 36 finishes printing and moves to the next recording position. Then, due to a slight backlash on the inclined surface of the descending slope 61b, the contact between the groove 5a of the support shaft 5 and the key 11 of the rotation transmitting element 9 is released as shown in FIG.

Therefore, during the waiting period until the next recording is performed after the recording by the hitting means 2 or the printing means 3, the cam is performed.
Since the contact between the keys 10 and 11 and the grooves 4a and 5a is released by the backlash of the descending slopes 51b and 61b in 51 and 61, the contact friction resistance is extremely small compared to the conventional one, and the carriage 1 is supported by the support shafts 4, 5, 4. Can be moved smoothly. Also,
In addition to this, the keys 10 and 11 are integrally molded in the shaft holes 8a and 9a of the rotation transmitters 8 and 9 with a synthetic resin material, so that the contact friction resistance can be further reduced, and long-term use It is also possible to improve the durability.

The degree of inclination of the descending slopes 51b and 61b depends on the groove of the support shafts 4 and 5.
The keys 10 and 11 are set to stop at positions where they do not come into contact with the grooves 4a and 5a, depending on the clearance C between the keys 4 and 5a and the keys 10 and 11 of the rotation transmitters 8 and 9.

By the way, in the above-mentioned embodiment, the example in which the downward slopes 51b and 61b formed on the cams 51 and 61 are used as the backlash means has been described.
Reverse rotation control means for slightly reversing 4,5 may be used. Such control means may be mechanically incorporated in the power transmission system for driving the support shafts 4 and 5, but controls a motor (not shown) which is a direct drive source of the support shafts 4 and 5. It may be incorporated in an electrical control system.

FIG. 6 is a block diagram of a recorder equipped with the above-mentioned reverse rotation control means.

This recorder is a carriage control means 100 controlled based on a control signal from the outside (not shown), a drive motor 101 driven based on the output of the carriage control means 100,
A drive system 102 for transmitting the rotational power of the drive motor 101 to the carriage 1 provided with the dot forming means 2 and the printing means 3.

The carriage control means 100 includes a horizontal direction control circuit 100a, a forward direction rotation control circuit 100b, and a reverse direction rotation control circuit 100c. The horizontal direction control circuit 100a moves the carriage 1 to the recording position in the axial directions of the support shafts 4 and 5. In order to do so, a signal is output to the drive motor 101. Positive direction rotation control circuit 100b has spindles 4,5
Is rotated in the normal direction to output a signal for recording by the dot printing means 2 or the printing means 3. Reverse rotation control circuit
100c is a groove 4a, 5a of the spindles 4 and 5a, as shown in FIGS. 4 (b) and 5 (b), during a waiting period until the next recording is performed by the hitting means 2 or the printing means 3. And rotation transmitter 8,9
In order to release the contact with the keys 10 and 11, the signals for slightly rotating the support shafts 4 and 5 are output.

Therefore, in this recorder, when recording is completed by the dot printing means 2 or the printing means 3 due to the forward rotation of the support shafts 4 and 5 of the forward rotation control circuit 100b, the reverse rotation control is performed during the waiting period until the next recording. Circuit 100c causes spindles 4 and 5 to reverse slightly,
The contact between the grooves 4a, 5a of the support shafts 4, 5 and the keys 10, 11 of the rotation transmitters 8, 9 is released, and the carriage is controlled to move to the next recording position by the horizontal direction control circuit 100a.

By the way, in each of the above-mentioned embodiments, the recorder having the carriage 1 and the printing means 3 has been described, but the configuration of the carriage device of the present invention is applied to the recorder having only the printing means 2. You may.

[Advantages of the Invention] As described above, according to the carriage device of the present invention,
When the carriage moves relative to the support shaft after recording, the contact between the groove formed on the support shaft and the key provided on the rotation transmitting element of the recording means can be released. Can be reduced, and the carriage can be smoothly moved in the axial direction. Further, since the contact friction resistance is small, the durability can be improved.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an embodiment of a carriage device of a recorder according to the present invention, FIG. 2 is an exploded perspective view of the same device, and FIGS. 3 (a) and 3 (b) are 4A and 4B are side views showing the operation of the hitting means in the apparatus, FIGS. 4A and 4B are views showing the operation of the cam with respect to the spindle of the hitting means in the apparatus, and FIG. 5A and FIG.
FIG. 6B is a diagram showing the operation of the cam with respect to the support shaft of the printing means in the same device, and FIG. 6 is a block diagram showing another embodiment of the carriage device of the recorder according to the present invention. 1 ... carriage, 2 ... dotting means, 3 ... printing means,
4,5 …… Support shaft, 8,9 …… Rotation transmitter, 8a, 9a …… Shaft hole, 4a,
5a ... Groove, 10, 11 ... key, 100c ... Reverse rotation control circuit.

Claims (3)

[Scope of utility model registration request] 1. An engaging portion is formed in the support shaft in the axial direction in order to operate a recording means to record on a recording sheet in the process of moving the carriage along the support shaft. At the same time, in a carriage device of a recorder in which a rotation transmitter that rotates coaxially with the spindle is borne by the carriage, the carriage after recording moves on the spindle on the spindle or the rotation transmitter. A carriage device for a recording apparatus, comprising: a backlash means for providing backlash within a clearance with the engagement portion, and releasing contact with the engagement portion. 2. The carriage device for a recorder according to claim 1, wherein the backlash means is a cam mechanism provided on the rotation transmitter side. 3. The carriage device for a recorder according to claim 1, wherein the backlash means is a reverse rotation control means provided on the support shaft side.