JPH06320825A - Recording apparatus - Google Patents

Abstract

PURPOSE:To provide a recording apparatus not stopping recording function by allowing the tooth-lacked gear provided on the driving side of a feed means intermittently feeding a recording medium to interfere with the tooth tips of a follower gear (feed roller gear) to lock the follower gear. CONSTITUTION:In the tooth lacked gear 60 integrally formed to a main gear, a part 36a of the tooth-lacked part of the tooth-lacked gear 60 is floated from the main gear to be formed into an arm shape and the toothed part 36 of the tooth-lacked gear 60 is provided to the leading end of the arm part 36a to be elastically supported in the center direction of the tooth-lacked gear 60. When the tooth-lacked gear 60 s rotated in the direction shown by an arrow R, even if the tooth tip of a feed roller gear 8a is present at the Z-position of a drawing (B) and interferes with the tooth tip of the toothed part 36 of the tooth-lacked gear 60, the arm part 36a is bent as shown by a drawing (C) and the toothed part 36 escapes in the center direction of the tooth-lacked gear 60 and, therefore, the tooth-lacked gear 60 and the roller gear 8 are mutually meshed to become a normal state as shown by a drawing (D) and driving is normally performed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording apparatus, and more particularly to intermittent conveyance of a recording medium.

[0002]

2. Description of the Related Art Conventionally, in a small serial type recording apparatus for recording by reciprocating a recording head in parallel with a recording medium, a recording head reciprocating operation and a recording medium conveying operation are performed by the same motor. As a recording medium conveying method, it is generally practiced to intermittently transmit power to a feed roller gear mounted integrally with a recording medium conveying member at a predetermined cycle by a paper feed toothless gear.
This also applies to a parallel type printing apparatus in which the printing operation on the printing medium and the conveying operation of the printing medium are performed by the same motor.

[0003]

However, since the feed roller gear is in the rotation free state when it is not meshed with the toothed portion of the paper feed missing gear, the feed roller gear is rotated by the paper feed missing gear. When the paper is rotated by an angle for some reason other than being caused, the tooth tips of the toothed portion of the paper feed missing tooth gear and the tooth tips of the feed roller gear may interfere with each other and become locked.

FIG. 19 shows a paper feed missing tooth gear 1 in a conventional example.
The structure of 60 is shown. In the figure, 136 and 137 are toothed portions of the paper feed missing tooth gear 160, each having two teeth and formed integrally with the base material 111 and the pedestal portion 136a.

FIG. 20 shows a state in which the conventional paper feed missing tooth gear 160 and the feed roller gear 138a are normally engaged with each other. The rotation of the toothed portion 136 of the paper feed missing tooth gear 160 in the R direction is normally transmitted to the feed roller gear 138a in the R'direction. However, if the feed roller gear 138a is in the position of FIG.
The tooth tip of the toothed portion 136 of 60 and the tooth tip of the feed roller gear 138a interfere with each other and become locked at the Z portion in the drawing,
The rotation of the paper feed missing tooth gear 160 is forcibly stopped,
The function of the recording device may stop.

The present invention has been made to solve this problem, and the toothless gear on the drive side of the transporting means for intermittently transporting the recording medium and its driven gear interfere with each other to be in a locked state and stop functioning. It is an object of the present invention to provide a recording device that does not have such a problem.

[0007]

In order to achieve the above-mentioned object, the present invention provides a recording apparatus as follows (1), (2), (3),
It is configured as in (4) and (5).

(1) A recording apparatus using a toothless gear on a driving side of a transporting means for intermittently transporting a recording medium, wherein the toothless gear has at least a part of its toothed portion. A recording device that is elastically supported in the direction of the center of the.

(2) In the toothless gear, a member for elastically supporting at least a part of the toothed portion in the center direction and at least a part of the toothed portion are integrally formed. ) The recording device described.

(3) In the toothless gear, at least a part of the toothed portion is formed separately from the toothless portion of the toothless gear and is supported by an elastic member having elasticity in the central direction. The recording apparatus according to (1) above.

(4) The recording apparatus according to (1), wherein recording is performed on a recording medium by an ink jet recording head equipped with an electrothermal converter for generating thermal energy for ejecting ink as recording means.

(5) The recording apparatus according to (4), wherein the recording means ejects the ink from the ejection port by utilizing the film boiling generated in the ink by the thermal energy applied by the electrothermal converter.

[0013]

[Operation] The above (1), (2), (3), (4), (5)
With this configuration, even if the toothed portion of the tooth-missing gear and the tooth tips of the gears driven by the toothless portion interfere with each other, the toothed portion does not escape into the central direction and become locked.

[0014]

EXAMPLE The present invention will be described in detail with reference to Example 1 below.

(Embodiment 1) FIG. 1 is an operation explanatory view of a paper feed toothless gear which is an essential part of a "recording apparatus" which is an embodiment 1. First, recording necessary for understanding this essential part. The configuration and operation of the device will be described.

(Overall Structure) FIG. 2 is a plan view showing a part of the present embodiment in a broken manner, FIG. 3 is a right side view showing a state in which the right side plate 10 is removed, and FIG. 4 is a left side view. 5 is a left side view showing a state in which the left side plate 16 is removed, and FIG. 6 is a front view.

In each drawing, reference numeral 1 is a base frame forming the main body of the apparatus, and a carriage 3 having a recording head 2 constituting a recording means is mounted on the frame 1.
It is attached so as to be movable in the directions of arrows P and Q. The recording head 2 in the present embodiment uses an inkjet recording method in which energy is applied in accordance with a recording signal to eject ink from an ink ejection port. Among them, ink is ejected to generate thermal energy as energy. A means (for example, an electrothermal converter or a laser beam) is provided, and a system that causes a change in the state of the ink by this thermal energy is used. This is because according to this method, high density recording and high definition recording can be achieved.

Reference numeral 4 is a hole 3a provided in the carriage 3.
Is a set lever which is rotatably attached about the center of the recording head 2. This is a member for pressing and fixing the recording head 2 to a flexible cable 6 for connecting to a drive circuit board (not shown).

The carriage 3 is a base frame 1
2 is supported by two sliding shafts 5a and 5b fixed to
It is configured to be slidable in the directions of arrows P and Q. Then, the carriage 3 enters a single groove 13b (see FIG. 7) formed in the screw 13, which is a rotating body to be described later, and the rotational movement of the screw 13 is performed as shown in FIG.
The protruding pin 22 (see FIG. 3) for converting into a linear movement in the directions of arrows P and Q is fixed.

Reference numeral 7 is a platen, which also has a function as a guide for a recording sheet which is a recording medium. A feed roller 8 for feeding the recording sheet is rotatably supported by the base frame 1 and the right side plate 10, and a gear portion 8a is formed at a predetermined position. A rubber ring 9 is attached to the center of the feed roller 8, and a pinch roller 23 is provided below each rubber ring 9 so as to face each other.
Pressure is applied to the rubber ring 9 via 3. The recording sheet is inserted between the rubber ring 9 and the pinch roller 23, and is conveyed according to the rotation amount of the feed roller 8.

In FIG. 3, 11 is a main gear,
This is fixed to the shaft 12, and the shaft 12 is rotatably supported by the base frame 1.

Reference numeral 14 denotes a reversing gear, which is the base frame 1
It is rotatably supported by a shaft protruding from the shaft. Thirteen
Is a screw, and a gear portion 13a is integrally formed at the right end portion thereof.

The reversing gear 14 and the screw gear 13a are always in mesh with each other, but the main gear 11 and the reversing gear 14 are in mesh with each other.
Alternatively, the power transmission is intermittently transmitted to the screw gear 13a by a mechanism described later.

In FIGS. 4 and 5, reference numeral 15 is a DC motor which is a drive source, and a worm gear 21 is press-fitted and fixed to the motor shaft. A disc-shaped encoder slit 21a is integrally formed at the tip of the worm gear 21, and is inserted into the concave groove of the ejection signal detector 19 (see FIG. 7). Reference numeral 17 denotes a wheel gear, which is similarly fixed to the shaft 12 for fixing the main gear 11 and is always in mesh with the wall gear 21.

The ejection signal detector 19 is a transmissive photo detector and is provided on the PCB 18. At the same time, a recording start signal detector 24 (see FIG. 7, transmissive photo detector) described later is provided on the PCB 18. ) Is also provided. 20
Is a flat cable that connects the PCB 18 and a drive circuit (not shown).

(Power Transmission System for Driving Carriage) Next, a power transmission system for reciprocating the carriage 3 will be described. FIG. 7 is a perspective view schematically showing a power transmission system relating to the reciprocating drive of the carriage, and the DC motor 15 always rotates in one direction when energized. As a result, the wheel gear 17 always rotates in the arrow J direction via the worm gear 21, and the main gear 11 also rotates in the J direction via the shaft 12.

As described above, when the power of the main gear 11, which is constantly driven to rotate in the J direction, is directly transmitted from the main gear 11 by the mechanism described later, the screw 13 moves in the direction of arrow K. The carriage 3 rotates, and at this time, the carriage 3 moves in the arrow P direction.

On the other hand, when power is transmitted from the main gear 11 to the screw gear 13a via the reversing gear 14,
Since the reversing gear 14 and the screw gear 13a are always meshed with each other, the reversing gear 14 rotates in the direction of the arrow L and consequently the screw gear 13a rotates in the direction of the arrow M. At this time, the carriage 3 moves in the direction of the arrow Q. Move to.

Next, the shapes of the main gear 11, the reversing gear 14, and the screw gear 13a will be specifically described with reference to FIGS.

FIG. 8 is an explanatory view of the main gear 11. The main gear 11 is provided at three facing portions, namely, a facing portion with the reversing gear 14, a facing portion with the screw gear 13a, and a facing portion with the feed roller gear 8a. Be divided.

First, the portion facing the screw gear 13a is
The gear portion 31 and the cam portions 30 and 32 at both ends thereof are provided. The number of teeth of the gear portion 31 is set to 18 teeth in this embodiment, but this value is set to the reversing gear 14 and the screw gear 13.
It is determined by the number of teeth of a and how many times the screw 13 is driven to rotate.

Next, the portion facing the reversing gear 14 is similarly composed of a gear portion 34 and cam portions 33 and 35 at both ends thereof,
It is set to have the same shape as the portion facing the screw gear 13a, and the difference is that the cams 33 and 35 are provided at each end, that is, the reversing gear 14 to be described later.
It is provided at a position facing the toothless portion (40 in FIG. 9, 42 in FIG. 10) of the screw gear 13a.

The portion facing the feed roller gear 8a will be described later.

9 (A) and 9 (B) are explanatory views of the reversing gear 14, in which a full-circumferential tooth portion 38 having full-circumferential teeth, a partially toothless portion (three teeth) 40, and a toothed portion 39 are shown. It is composed of As described above, the toothless portion 40 is formed by the cam portions 33 and 35 of the main gear 11.
And in the opposite position.

The teeth of the full-circumferential tooth portion 38 and the toothed portion 39 are set so as to be out of phase with each other by half a tooth α in the rotational direction.

FIGS. 10A and 10B show the screw gear 1
It is explanatory drawing of 3a. Note that FIG.
It is an AA sectional view of (A). Like the reversing gear 14, it is configured by a partially toothless portion (three teeth) 42 and a toothed portion 41. The toothless portion 42 is the cam portion 32 of the main gear 11,
It is provided at a position facing 30.

Next, a specific operation will be described with reference to FIG. 11A to 11D, in order to facilitate understanding of the operation, the reverse gear facing portion of the main gear 11 and the reverse gear 1 are illustrated.
11 (A) shows a state in which the cam portion 35 of the main gear 11 has entered the toothless portion 40 of the reversing gear 14, and at this time the revolving gear 14 still has no rotational force. Even if the main gear 11 is not transmitted and the main gear 11 rotates in the arrow J direction, the reversing gear 14 is stopped. Next is the main gear 11
11 further rotates in the direction of arrow J, the tooth portion 34a provided on the main gear 11 meshes with the tooth portion 14a of the reversing gear 14 as shown in FIG. 11B, and the reversing gear 14 moves in the direction of arrow L in the figure. It is driven to rotate.

In FIG. 11C, the reversing gear 14 is still rotationally driven in the arrow L direction. Then, as described above, when the teeth of the main gear 11 are set so that the tooth portions 34b mesh with each other, as shown in FIG. 11 (D), the reversing gear 14 makes one revolution, and then the cam portion 33 enters the toothless portion 40 to invert. Gear 1
4. Stop the rotation of 4 and lock it. The same operation is performed in the mutual transmission operation between the screw gear facing portion of the main gear 11 and the screw gear 13a.

Further, the entire circumference tooth portion 38 of the reversing gear 14 (see FIG. 9).
Since the screw gear 13a and the screw gear 13a are always in mesh with each other, one rotation operation of the reversing gear 14
3a, the screw 13 makes one rotation.

Here, as shown in FIG. 8, the facing portion of the main gear 11 facing the reversing gear 14 and the facing portion of the screw gear 13a are set to have a phase substantially shifted by 180 ° (actually, Fig. 12 against 180 °
(The phase is further deviated by the angle θ between the position of the reversing gear 14 and the screw gear 13a to the center of the main gear 11 as shown in FIG. 11). In the state of FIG. The positional relationship with the screw gear 13a is in the state shown in FIG.

However, in FIG. 7, when the main gear 11 rotates 0 ° to 180 °, the reversing gear 14 makes one rotation in the direction of arrow L, and the screw gear 13a makes one rotation in the direction of arrow M via this reversing gear 14. To do.

When the main gear 11 rotates 180 ° to 360 °, the screw gear 13a makes one rotation in the direction of arrow K, and the reversing gear 14 makes one rotation in the direction of arrow N via this screw gear 13a.

When the state is switched to →, →, the cam portions 32 and 35 are accurately inserted into the toothless portions of the reversing gear 14 and the screw gear 13a, and the cam portions 30 and 33 are toothless. It goes into the part and fixes each gear.

(Recording Sheet Conveyance Transmission System) Next, the recording sheet conveyance transmission system will be described. In the recording sheet conveying operation, the toothed portions 36 and 37 of the toothless gear 60 integrally formed with the main gear 11 in FIG. 8 are accompanied by the rotation operation of the main gear 11, that is, the gear portion of the feed roller 8, that is, the feed roller gear 8a. It is made by intermittently rotating. The toothed portions 36 and 37 are out of phase with each other by 180 °, so that the carriage 13 is driven by the screw 13 in the vicinity of both sides of the apparatus and in a region that does not affect the recording operation of the recording head 2. Is set to.

(Description of Recording Operation) Next, the recording operation in this embodiment will be described. Note that FIG. 13 is a block diagram of the control system in this embodiment, which is composed of a CPU 50, a keyboard 51, a display 52, a power supply unit 53, a motor drive circuit 54, a recording head drive circuit 55, and a recording device 56. The signals input from the recording device 56 to the CPU 50 are the ejection position detection signal output from the ejection signal detector 19 (see FIG. 7) and the recording start signal detector 24.
2 of the ejection start position detection signal output from (see FIG. 7)
It is a kind.

When a voltage is applied to the DC motor 15 to start it, a discharge position detection signal is generated by the encoder slit disk 21a formed integrally with the worm gear 21. This signal is set to be generated in a one-to-one correspondence with each dot row in the dot matrix.

Next, the carriage 3 starts moving in the direction of arrow P from the right end position in FIG. 2, for example, by the mutual operation of the main gear 11, the reversing gear 14, and the screw gear 13a.

Next, referring to FIG. 7, the encoder plate 25 fixed to the end of the screw 13 rotates as the screw 13 rotates, and the slit 25 formed in the circumferential portion of the encoder plate 25 rotates.
a and 25b generate recording start position signals.

The CPU 50 receives the ejection start position detection signal and, at the same time, selectively outputs a recording signal in synchronization with the ejection position detection signal, thereby performing recording in the direction of arrow P in FIG. Then, when the recording in the P direction is completed, the CPU 50 counts the number of pulses of the ejection position detection signal, and turns off the energization of the DC motor 15 after N pulses. At this time, as described above, the recording sheet conveying operation has already been completed, and the carriage 3 stops at the left end portion in FIG. The above timing chart is shown in FIG.

Next, when the DC motor 15 is started again, the screw 13 is turned on by the reversing mechanism of the screw 13 described above.
Reversely rotates and the carriage 3 starts moving from the left end of FIG. 2 in the direction of arrow Q. A discharge position detection signal is also generated at the same time when the DC motor 15 is activated.

Further, the rotation of the encoder plate 25 again generates a discharge start position detection signal, and in synchronization with this, the C
By selectively outputting the recording signal from the PU 50,
Recording is performed in the direction of arrow Q in FIG.

When the recording in the direction of the arrow Q is completed as described above, the CPU 50 counts the number of pulses of the ejection position detection signal and turns off the energization of the DC motor 15 after M pulses. At this time, as described above, the recording sheet conveying operation has also been completed, and the carriage 3 stops at the right end portion in FIG. The above timing chart is shown in FIG.

By repeating the above operation,
Recording is performed on the recording sheet. Further, the CPU 50 needs to determine in advance whether the carriage 3 is located at the left end portion or the right end portion. As a method thereof, for example, when the system is powered on or a specific key (all clear key, etc.) is used. ) The DC motor 15 is energized when is pressed. Then, as shown in FIG. 14 or FIG. 15, the shape of the encoder plate 25 is set so that the ejection start position detection signals generate different signals in the arrow P direction and the Q direction. Then moving in P direction, Y
→ If it is Y type, the CPU 50 determines that it is moving in the Q direction.

The difference between the encoder pulses X and Y is that
By counting the number of pulses of the ejection position detection signal during that time, it is possible to accurately determine even if the rotation speed of the DC motor 15 is different.

Further, the number of pulses from the end of recording in the P direction and the Q direction until the driving of the DC motor 15 is stopped is N and M, respectively, but these pulse numbers are basically set to the same value. However, a slight difference may be made due to a difference in load or the like.

(Description of Paper Feed Missing Gear) In this embodiment,
As shown in FIG. 1 and FIG. 8 and the like, in the recording sheet conveyance transmission system described above, regarding the toothless gear 60 formed integrally with the main gear 11, the pedestal portions 36a and 37a of the toothed portions thereof are provided.
The arm is made to have springiness (elasticity) and is elastically movable in the direction of the center of the toothless gear 60, so that the main gear 11 (the toothless gear 60) and the gear portion of the feed roller 8 (feed roller gear). 8a and the teeth of the toothed portions 36 and 37 of the tooth-chipped gear 60 and the teeth of the gear portion 8a of the feed roller 8 do not mesh properly and interfere with each other, the tooth-chipped gear 6
It prevents the toothed portion 36 or 37 of 0 from moving elastically in the central direction and escaping to enter the locked state. 3
A fixed portion 6b is fixed to the main gear 11, and constitutes a toothless portion of the toothless gear together with a part of the arm portion.

This operation will be described in detail with reference to FIG.
(A) of the figure shows a paper feed missing tooth gear 60 and a feed roller gear 8a.
Shows that they are normally engaged. In this state, the rotation of the paper feed missing tooth gear 60 in the R direction in the figure is normally transmitted to the feed roller gear 8a in the R'direction.

However, when the tooth tip of the feed roller gear 8a is located at the Z portion shown in (B) for some reason, the first tooth that first bites with the feed roller gear 8a in the toothed portion 36 of the paper feed missing tooth gear 60. And the tip of the feed roller gear 8a interfere with each other. However, since the toothed portion 36 of the paper feed tooth-missing gear 60 is integrally formed with the arm portion 36a which has a spring property and is elastically movable in the X direction in the drawing,
As shown in (C), the toothed portion 36 of the paper feed missing tooth gear elastically moves in the X direction in the drawing. Therefore, the paper feed missing tooth gear 6
The interference between 0 and the tooth tip of the feed roller gear 8a is released, and after the release, the normal engagement state shown in (D) is restored by the spring force.

As described above, according to this embodiment, the toothless gear on the driving side of the conveying means for intermittently conveying the recording sheet (recording medium) and the feed roller gear interfere with each other to be locked. It is possible to prevent the recording function from stopping.

(Embodiment 2) FIG. 16 is an explanatory diagram of a partly toothless gear used in this embodiment.

In the first embodiment, the paper feed missing gear 60 has two gears.
An arm portion 36 having a tooth structure and having two springs.
a, 37a are integrally formed with the arm portions 36a, 36b.
The gear is integrally formed with the main gear 11, but the toothless gear of the present embodiment, as shown by 61 in FIG. 16, has only the first tooth of the two teeth that first meshes with the feed roller gear 8a. 36a and 37a are formed integrally with each other, and the other one tooth is provided on the adjacent fixing portions 36c and 37c. Also in this embodiment, it is possible to avoid the locked state due to the escape toward the center of the first tooth, and the same effect as that of the first embodiment can be obtained.
The same applies to Examples 3 and 4 described later.

(Embodiment 3) FIG. 17 is an explanatory diagram of a tooth-chipped gear used in this embodiment. In the first and second embodiments, the arm portions 36a and 37a have a cantilevered leaf spring shape, but in the toothless gear 62 of the present embodiment, as shown in FIG. 17, the arm portions 36d and 37d have both ends. It is shaped like a leaf spring.

(Embodiment 4) FIG. 18 is an explanatory view of a toothless gear used in this embodiment. The toothed portions 36 and 37 of the paper feed tooth-missing gear according to the first to third embodiments are integrally formed with the main gear 11 and the arm portion having a spring property, but in the present embodiment, as illustrated, Toothed portions 36 and 3 of the toothless gear 63
7 is formed separately from the main gear 11 and the arc-shaped toothless portion 64, and the toothed portion 3 is formed by a coil spring 65 which is a separate member.
6 and 37 are elastically supported in the X and Y directions in the drawing, respectively.

(Related Art of the Present Invention) The present invention is particularly effective in an ink jet type recording head and recording apparatus for recording by forming flying droplets by utilizing thermal energy among the ink jet recording systems. To bring.

Regarding its typical structure and principle, see, for example, US Pat. Nos. 4,723,129 and 4,740.
What is done using the basic principles disclosed in 796 is preferred. This method can be applied to both the so-called on-demand type and the continuous type, but especially in the case of the on-demand type, liquid (ink)
By applying at least one drive signal to the electrothermal converter arranged corresponding to the sheet or liquid path in which is stored, which corresponds to the recorded information and causes a rapid temperature rise exceeding nucleate boiling. , It is effective because it generates heat energy in the electrothermal converter, causes film boiling on the heat-acting surface of the recording head, and as a result, can form bubbles in the liquid (ink) that correspond one-to-one to this drive signal. Is. Liquid (ink) flows through the ejection openings due to the growth and contraction of these bubbles.
To form at least one drop. When this drive signal is pulsed, the growth and contraction of the bubbles are performed immediately and appropriately, so the liquid (ink) with excellent responsiveness is used.
It is more preferable that the discharge can be achieved.

As the pulse-shaped drive signal, those described in US Pat. Nos. 4,463,359 and 4,345,262 are suitable. If the conditions described in US Pat. No. 4,313,124 of the invention relating to the rate of temperature rise of the heat acting surface are adopted, more excellent recording can be performed.

As the constitution of the recording head, in addition to the combination constitution of the discharge port, the liquid passage, and the electrothermal converter (the linear liquid passage or the right-angled liquid passage) as disclosed in the above-mentioned specifications, The present invention also includes a configuration using US Pat. No. 4,558,333 and US Pat. No. 4,459,600, which disclose a configuration in which the heat acting portion is arranged in a bending region.

In addition, Japanese Patent Application Laid-Open No. 59-123670 discloses a structure in which a common slit is used as a discharge portion of the electrothermal converter for a plurality of electrothermal converters, and a pressure wave of thermal energy is absorbed. The present invention is also effective as a configuration based on Japanese Patent Application Laid-Open No. 59-138461, which discloses a configuration in which an opening corresponds to a discharge portion.

In addition, by being mounted on the apparatus main body, it can be electrically connected to the apparatus main body and can be supplied with ink from the apparatus main body by a replaceable chip type recording head or the recording head itself. The present invention is also effective when a cartridge-type recording head provided with an ink tank is used.

Further, it is preferable to add recovery means for the recording head, preliminary auxiliary means, etc., which are provided as a configuration of the recording apparatus of the present invention, because the effects of the present invention can be further stabilized. If you list these specifically,
Capping means, cleaning means, pressurizing or sucking means for the recording head, preheating means using an electrothermal converter or another heating element or a combination thereof, and a preliminary ejection mode for performing ejection other than recording It is also effective to perform stable recording.

Further, the recording mode of the recording apparatus is not limited to the recording mode only for the mainstream color such as black, but the recording head may be integrally formed or a plurality of combinations may be used. The present invention is also extremely effective for a device provided with at least one of full colors by color mixing.

In the embodiments of the present invention described above, the ink is described as a liquid, but it is an ink which solidifies at room temperature or lower and softens at room temperature, or a liquid, or the above-mentioned. In the inkjet method, the temperature of the ink itself is generally adjusted within a range of 30 ° C. or higher and 70 ° C. or lower to control the temperature of the ink so that the viscosity of the ink is within a stable ejection range. It may be in a liquid form.

In addition, the temperature rise due to thermal energy is positively prevented by using it as the energy for changing the state of the ink from the solid state to the liquid state, or the ink is solidified in the left state for the purpose of preventing evaporation of the ink. In some cases, such as ink that is liquefied by being applied with heat energy according to a recording signal and ejected as a liquid ink, or one that has already started to solidify when it reaches a recording medium. The use of an ink that has the property of being liquefied only by heat energy is also applicable to the present invention. In such a case, the ink is retained as a liquid or solid in the recesses or through holes of the porous sheet as described in JP-A-54-56847 or JP-A-60-71260. It may be configured to face the electrothermal converter. In the present invention, the most effective one for each of the above-mentioned inks is to execute the above-mentioned film boiling method.

In addition, as a form of the recording apparatus according to the present invention, in addition to a recording apparatus provided integrally or separately as an image output terminal of information processing equipment such as a word processor or a computer, a copying apparatus combined with a lead or the like, May take the form of a facsimile machine having a transmission / reception function.

[0075]

As described above, according to the present invention,
Even if the toothless gear on the drive side of the transporting means that intermittently transports the recording medium and the gear that follows this interfere, the toothed part of the toothless gear escapes toward the center of the toothless gear, so lock It is possible to prevent the recording function from being stopped in this state.

[Brief description of drawings]

FIG. 1 is an operation explanatory diagram of a paper feed missing tooth gear in the first embodiment.

FIG. 2 is a partially cutaway plan view of the first embodiment.

FIG. 3 is a right side view showing a state in which the right side plate of the first embodiment is removed.

FIG. 4 is a left side view of the first embodiment.

FIG. 5 is a left side view showing a state in which the left side plate of the first embodiment is removed.

FIG. 6 is a front view of the first embodiment.

FIG. 7 is a perspective view showing a power transmission system for reciprocating the carriage.

FIG. 8 is an explanatory diagram of a main gear

FIG. 9 is an explanatory diagram of a reversing gear.

FIG. 10 is an explanatory diagram of a screw gear.

FIG. 11 is an explanatory diagram of engagement and disengagement of the main gear and the reversing gear.

FIG. 12 is an explanatory diagram of a relationship between a main gear, a reversing gear, and a screw gear.

FIG. 13 is an explanatory diagram of a control system according to the first embodiment.

FIG. 14 is a timing chart when recording in the P direction.

FIG. 15 is a timing chart when recording in the Q direction.

FIG. 16 is an explanatory diagram of a paper feed missing tooth gear according to the second embodiment.

FIG. 17 is an explanatory diagram of a paper feed missing tooth gear according to the third embodiment.

FIG. 18 is an explanatory diagram of a paper feed missing tooth gear according to the fourth embodiment.

FIG. 19 is an explanatory diagram of a paper feed missing tooth gear in a conventional example.

FIG. 20 is a diagram showing a normal meshing state of a paper feed missing tooth gear and a feed roller gear in a conventional example.

FIG. 21 is a diagram showing a locked state of a paper feed missing tooth gear and a feed roller gear in a conventional example.

[Explanation of symbols]

 36, 37 Toothed part of paper feed missing gear 36a, 37a Arm part 60 Missing gear

Claims (5)

[Claims] 1. A recording apparatus using a toothless gear on a driving side of a transporting means for intermittently transporting a recording medium, wherein the toothless gear has at least a part of its toothed portion of the toothless gear. A recording device, which is elastically supported in the central direction. 2. The toothless gear is characterized in that a member elastically supporting at least a part of the toothed portion in the center direction and at least a part of the toothed portion are integrally formed. The recording device according to claim 1. 3. The toothless gear is such that at least a part of the toothed portion is formed separately from the toothless portion of the toothless gear and is supported by an elastic member having elasticity in the center direction. The recording apparatus according to claim 1, wherein: 4. The recording apparatus according to claim 1, wherein the recording medium is recorded by an ink jet recording head having an electrothermal converter for generating thermal energy for ejecting ink as recording means. 5. The recording apparatus according to claim 4, wherein the recording unit ejects the ink from the ejection port by utilizing the film boiling generated in the ink by the thermal energy applied by the electrothermal converter.