JPH03101946A - Ink jet recorder - Google Patents

Abstract

PURPOSE:To use a cover for the inside of a device as a paper discharge tray functioning as a stacker for recording paper to be discharged by a method wherein the upper end of the tray is disposed in the vicinity of a straight line in a paper discharge direction, the lower end thereof is disposed below a paper discharge port, and the length of the tray is shorter than that of recording paper to be discharged. CONSTITUTION:In the case of normal recording paper fed by an autofeeder 200, an upper cover 102 can be used as a stacker for discharged recording paper. At this time, the discharged recording paper is fed in the air by some distance by its own nerviness and firstly brought into contact with the upper cover 102 or stacked recording paper at a position in the vicinity of an upper end 102A of the upper cover 102. In this manner, the recording paper to be discharged can be avoided from slinding on the stacked recording paper, whereby the stain on the recording paper with an unfixed ink can be prevented. It is required that the upper end 102A should be disposed to be almost flush with a common tangent line of a paper feed roller 36 and a paper discharge roller 60 and a lower end 102B should be disposed to be lower than the common tangent line. To meet the requirement, the length of the upper cover 102 in paper discharge direction is pref. 70-80% of the recording paper length.

Description

[Detailed description of the invention]

[Industrial Field of Application] The present invention relates to an inkjet recording device. [Prior Art] This type of apparatus includes, in addition to the configuration related to direct recording, a configuration specific to a method of recording by ejecting ink. In other words, depending on the recorded data, if a certain ejection port does not eject for a long time, or if the device itself is not used for a long period of time, the ink in the ejection port or the ink chamber communicating with the ejection port may increase due to water evaporation. This may cause viscosity and non-ejection, and ink droplets may form on the ejection orifice surface where the ejection orifice is installed. Water droplets, dust, etc. may adhere to the ink, and the ejected ink droplets may be pulled by these adhering substances, causing the ejection direction to be deflected. For this reason, inkjet recording devices
In order to prevent ejection failure or deflection of the ejection direction, various configurations are provided as a so-called ejection recovery system. These ejection recovery systems include a preliminary ejection system for ejecting ink onto a predetermined ink-receiving medium and eliminating additional ink, etc., to prevent ejection failures. Ink suction for sucking ink from the ejection port or ink chamber to remove the above.
Furthermore, there are capping configurations for sealing the ejection port surface and preventing ink moisture from evaporating from the ejection port. Further, as a structure for preventing deflection of the ejection direction, there is a structure in which the ejection port surface is wiped to remove dust, ink droplets, etc. adhering to the vicinity of the ejection port. Furthermore, in recent years, it has become common for inkjet recording apparatuses to be able to record on various recording media such as plain paper envelopes, and are designed to accommodate the particular thickness of these recording media. That is, a mechanism is provided that adjusts the distance between the recording head and the recording medium so that the distance between the recording head and the recording medium is appropriate during recording, depending on the recording medium used. On the other hand, in recent years, inkjet recording devices, especially recording heads, have been manufactured using semiconductor film-forming processes and microfabrication techniques, and smaller and cheaper recording heads are being realized. This results in
For example, a disposable type recording head with an integrated ink tank has also been proposed. Along with this, there is a demand for an inkjet recording device that is compact and inexpensive, and that is easier for users to use. [Problems to be Solved by the Invention] However, miniaturization of such a device requires that the space for the arrangement or operation of the members constituting the device is limited, and that the members themselves are made smaller. As a result, each of the above-mentioned configurations, as well as other configurations of the device and related mechanisms between these configurations, need to be different from those of relatively large devices. From the above point of view, it should be considered that the members or mechanisms constituting the device are configured to serve other functions as well. The present invention has been made mainly based on this point of view, and its object is to use the lid that covers the inside of the recording device as a paper ejection tray when the recording device is not in use, and to reduce the length and length of the lid. An object of the present invention is to provide an inkjet recording device that can function as a stacker that stacks ejected recording sheets in an orderly manner by appropriately determining the arrangement and the like. [Means for Solving the Problems] For this purpose, in the present invention, in an inkjet recording apparatus equipped with a tray for receiving discharged recording paper, the upper end of the tray is located near a straight line forming the direction of paper discharge. The tray has a lower end located below the paper ejection port, and the length of the tray is shorter than the length of the recording paper to be ejected. More preferably, the tray comprises a lid member for covering the device. [Function] According to the above configuration, the discharged recording paper is conveyed through the air and first comes into contact with the upper end of the tray, and the upper end is rubbed. Thereafter, when the trailing edge of the recording paper is discharged from the paper ejection port, the sliding blade stops and the trailing edge of the recording paper drops downward. [Example] Hereinafter, an example of the present invention will be described in detail with reference to the drawings. FIG. 1 is an external perspective view of an inkjet recording apparatus according to a practical example of the present invention, FIG. 2 is a perspective view of the main parts of the apparatus shown in FIG. 1 excluding the case, etc., and FIG. Figures (A) and (B) are also diagrams mainly showing the paper ejection system of the apparatus shown in Figure 1. In FIG. 1, reference numeral 100 indicates an inkjet recording device, and this device 100 is used when placed as shown in the figure, and when used vertically as described later.
It is used in some cases and is relatively small. 101 is a device case, 102 is an outer lid, and 103 is an inner lid. When not in use, the outer M102 is superimposed on the inner, IIL03, making the device 100 compact. This allows the user to carry the recording device, for example, by putting it in a dedicated storage bag. In addition, the outer M102 can also be used as a paper guide for the recording paper 40 as shown in the figure, and in this case,
06 is the paper feed port. Furthermore, the outer lid 102 can also be used as an IJ} paper tray, as will be described later. '' In either case, 107 in the figure is the paper discharge port. 105 is a hook for fixing the position of the upper lid 102, and 104 is an operation key, a display section, etc. Next, the configuration of the main parts of the apparatus will be explained with reference to FIG. In the figure, I is a chassis, and a left side plate 1a and a right side plate 1b, which also serve as guides for recording media such as paper, are erected on the rear side. Further, the chassis 1 is provided with a motor mounting hole for rotatably supporting a carrier motor, which will be described later, but is not shown. 1h is a lead arm that supports a lead screw, which will be described later, in the axial and radial directions, and includes a bearing part (not shown).
It is pivoted on. 2 is a lead screw, and lead grooves 23 are formed in the range 21 at a predetermined pitch. Also,
On the carrier home position side of the lead screw 2, a position 3b for setting a cap and a position for discharge recovery is formed along a cross section perpendicular to the screw axis. Furthermore, is the lead groove 28 and position m3b introduced? It continues smoothly with M3c. A shaft 2g is provided on the right end of the lead screw 2, and a glaze is provided on the left end side, which are fitted into bearings provided on the front plate 1c and the lead arm lb, respectively.
It is supported so that it can rotate freely. , 3 is the groove 3
b, 3c, and is a dowel provided on the shaft of the lead screw 2, and a boule 3a is provided at the end thereof. A driving force is transmitted from the motor 1l to the pulley 3a via the timing belt l3. Further, the shaft 2g on the right end side of the lead screw 2 is slidably engaged with the groove of the guide plate 1c connected to the chassis right side plate 1b and the chassis 1, and is rotated in the thrust direction by the holding part IQa of the leaf spring IO. While being pressed, the shaft 2g is further engaged with a cam of a cam groove plate 50a rotatably supported by a shaft provided on the guide plate 1c. Cam groove plate 50
Interlocking teeth are formed around a, and this and the leaf spring l
By engaging with the ratchet portion 10c of O, the cam groove plate 50a can be latched at a desired rotational position. As a result, the position of the shaft 2g that engages with the cam groove is determined in the groove of the guide plate 1c, and therefore the position of the lead screw 2 at the right end of the device is determined. This configuration is used for adjusting the gap between the recording head and the platen, which will be described later. Reference numeral 4 denotes a clutch gear, which is slidably supported in the axial direction with respect to the lead pulley 3, and is engaged in the rotational direction by a key provided on the lead pulley 3, which will be described later in FIG. The rotational force of the lead screw 2 is transmitted. A clutch spring 5 is a compression spring that biases the clutch gear 4 in the direction of the lead groove. A regulating member is formed between the clutch gear 4 and the lead boot 3 to prevent the clutch gear 4 from moving within a predetermined range in the sleeve direction. A carrier 6 is slidably attached to the lead screw 2. Reference numeral 6a is a suppressing portion for pressing the edge of the clutch gear 4, and is integrally formed on the left side of the carrier. 7 is a lead bin, and lead screw 2
The lead? A2a, and its pressing direction is guided by a guide hole (not shown) in the carrier 6. 8
is a lead pin spring, one end of which is attached to the carrier 6, and the other end pressing the lead pin 7. Reference numeral 9 denotes a recording head mounted on the carrier 6, and in the example shown in FIG. It is a disposable type that can be replaced when the ink is consumed. Note that an electrothermal transducer or an electromechanical transducer is used as the ejection energy generating element disposed in the head element 9a to apply ejection energy to the ink, but it is possible to implement high-density mounting of ink ejection ports, etc. Something. The former is preferably used because the manufacturing process is simple. 6c is a hook, which is fixed to a part of the carrier 6, and as will be described later (when the rear 6 is moved, the recording head 9
A used to stably stop at the cap position, etc.
! It is a 1 structure. A carrier guide shaft 51 is slidably engaged with a guide pin 6b provided at the rear end of the carrier 6. The guide shaft 51 is an eccentric shaft 5 as described later in FIG.
1a, and these shafts 51a are rotatably supported by side plates 5lb and 51c provided at the ends of the chassis l. Furthermore, the end of the shaft 51a, which is supported by the side plate 51c, is fixed to a positioning knob 51d, and the shaft 51 is rotated by engaging a protrusion provided on the knob 51d with a hole 51e provided on the side plate 51c. The location is determined. As shown in FIGS. 4(A) and 4(B), the above-described configuration allows the distance between the recording surface of the recording paper 40 and the ejection port of the head element 9a to be set appropriately depending on the type of the recording paper 40. It is for the purpose of That is, by manually rotating the knob 51d. "lqh 5 l is set at the position where the distance between the shaft 51a and the bottle 6b is the minimum as shown in Figure 4 (A), and at the position where the distance between the shaft 51a and the bottle 6b is the maximum as shown in Figure 4 (B). Accordingly, the recording head 9 rotates about the lead screw 2 as a rotation axis, and the recording paper 40 is moved to a position corresponding to relatively thin plain paper (fourth position).
4(A)), or at a position with a large interval (FIG. 4(B)) corresponding to relatively thick recording paper such as an envelope. However, the configuration described above is compatible with the recording paper used during recording. That is, during the ejection recovery process, the recording head 9 is moved to the position of the recovery process system shown at the left end in FIG. At this time, the recording head 9 and the recovery system must always be in a predetermined positional relationship. Therefore, Figure 4 (A
) or (B), the recording head 9 needs to take a fixed position during the ejection recovery process. The configuration for this purpose is shown in FIGS. 5(^) and (B). FIGS. 5(^) and (B) show diagrams corresponding to FIGS. 4(A) and (n), respectively. ``In the case of f35 diagram (8), !FIfl5 1 and pin 6b
IIIth5la and pin 6b can be engaged without changing the height of the engagement position. At this time, in order to maintain the height of the locked position, the parallel surface of the trapezoidal cam 51g is also engaged with the pin 6b. In the case of FIG. 5(B), the recording head 9 moves and the bin 6b
When the pin 6b attempts to engage @51a, the height of the locked position of the bottle 6b changes. Therefore, the shaft 5l has a tapered portion 51.
Accordingly, the trapezoidal cam 5 [g is provided with a tapered surface. As a result, as the height of the engagement position of the bottle 6b with the shaft 51 (tapered portion 51f, shaft 51a) changes, the height is maintained. With the above configuration, when the recording head 9 reaches the position of the ejection recovery system, it is possible to always maintain a predetermined height and therefore a predetermined positional relationship with the recovery system. Note that the rotationally fixed position of the recording head 9 is 2 as described above.
However, it is possible to fix it at an intermediate position and make it compatible with recording paper of various thicknesses. In this case, the protrusion of the knob 51d and the hole 51e of the side plate 51c
All you have to do is increase the number of engagement positions. Furthermore, the rotation of the knob 51 (I) is not limited to manual operation; for example, the knob 51d can also be rotated using the driving force of a paper feed motor or the like in accordance with the key manual power corresponding to the recording paper used. Again, FIG. Referring to 11, reference numeral 11 is a carrier motor made of, for example, a pulse motor, and rotary pins lla are provided in alignment at the lower part of the front and rear surfaces of the carrier motor. (not shown) is rotatably attached to a motor attachment hole provided in a recovery system base 50 that is movable on the chassis 1.Of course, a rotating bottle is provided in the recovery system base 50 and the attachment hole is The carrier motor 1l may be attached to the motor side.The carrier motor 1l is attached so as to be rotatable around the rotation pin lla.llb is a spring receiver and is integrally formed with the carrier motor 1l, It stands parallel to the motor shaft to receive a motor spring 14, which will be described later.A cylindrical protrusion is formed on the spring receiving portion, and portions e and 7a of the coiled motor spring 14 are fixed thereto. 12 is a 101 taboo and is fixed to the motor shaft of the carrier motor 1l. 13 is a timing belt,
It is stretched between the motor pulley I2 and a pulley 3a provided on the shaft of the lead screw 2. The motor spring l4 is a compression spring in the configuration shown in the wooden example, and is attached between one end of the lead arm Ih and the spring receiver Ilb of the carrier motor l1. force, tie belt

[Tension is applied to 3. Reference numeral 15 denotes a set shaft, which is erected on a side plate (not shown) fixed to the base 5o, to which a means for improving the discharge port shape, a cap, and a so-called recovery system mechanism related to discharge recovery are attached. By the way, as mentioned above, the positional relationship between this recovery system mechanism and the recording head 9 is important. To give an example, the positional relationship with the ejection orifice surface is important for the plate to perform its function of wiping the ejection orifice surface of the recording head 9 well, and also for improving the capping function of the ejection orifice surface. The distance between the cap and the discharge port surface is important. Therefore, it is desirable that the positional relationship between these recovery system mechanisms and the recording head 9 is always kept constant. On the other hand, the recording head 9 is driven by the lead screw 2 as the driving force is transmitted through the lead screw 2.
Record while moving along the At this time, recording paper 4
It is clear that it is desirable that the distance between 0 and the ejection opening of the recording head 9 be the same at any position of movement. Therefore, by adjusting the distance of the recording head 9 to the recording paper,
An adjustment mechanism may be provided that allows the recording head to move parallel to the recording paper, but this adjustment may impair the fixed positional relationship with the recovery system. Therefore, in this embodiment, a recovery system base 50 provided with a carrier motor l and a recovery system mechanism to be described in detail later is made movable with respect to the chassis l. By this movement of the head 50 and the adjustment by the cam plate 50a described above, the position of the lead screw 2 is adjusted at both ends, so that the recording head 9 moves parallel to the recording paper 40. The details of the mechanism in the base 50 for this purpose are shown in FIG. FIG. 6 is a perspective view of the recovery system base 50 from the opposite direction from FIG. 2, and is shown in a partially cutaway view. In the figure, 50e is a guide groove member fixed to the side surface of a groove provided on the back side of the base 50, and this member 50e
groove, and a key-shaped guide member 1k fixed to the chassis 1.
By engaging with the guide portion, the moving direction of the base 50 is regulated, and the base 50 can be prevented from floating up from the chassis 1. In the above mechanism, as the details are shown in FIG. Press one side while making contact with the other side. At this time, the base 50 moves in the direction guided by the member 5 (le) and the member 1k due to the reaction force of the pressing force. The cam plate may be rotated around a predetermined rotation by operating the engaging shaft. With this movement, the carrier motor 1l attached to the base 50 and the drive system for driving the motor 1l , that is, the timing belt 13, the pulleys 3, 12, the lead screw 2, etc., and the recovery system mechanism similarly attached to the base 50 move together while the lead screw 2
The position of one end of is adjusted. On the other hand, the position of the other end of the lead screw 2 is adjusted by rotating the cam groove plate 50a. With the above adjustment, the lead screw 2 can be made parallel to the recording paper, so that the recording head can move parallel to the recording paper. j (Oh, this adjustment is performed by an assembly robot during the light manufacturing process of the recording device, but this adjustment may also be performed on the user side, for example, after using the device for a long period of time, etc.) Next, means for improving the discharge port forming surface, which is one of the recovery system mechanisms, will be explained with reference to FIG. 2 and FIGS. 7(A) to 7(C). It is a blade lever (see Fig. 7 (A)), and a boss portion 16a is attached to the set @ 15 so as to be rotatable. 16b is an arm portion, and 16c is a hook portion. 17 is for wiping the surface on which the discharge port is formed. The blade can be made of an elastic material such as silicone rubber or chloroprene (CR) rubber.l8 is the blade shaft;
7 is clamped at the center parallel to the rotation axis, and is rotatably attached to the blade lever 16. Further, 18a is a rotating piece, which is formed integrally with the blade shaft 18. , 19 is an ink carrier, which is made of a hydrophilic porous material (plastic sintered body, urethane foam, etc.), and is fixed to the plate lever 16. Incidentally, the plate I7 and the ink carrier I9 are arranged at a position J2 so as to overlap with a cap, which will be described later. 20 is a set lever, which is rotatably attached to the set shaft l5. 20a and 20b are stop teeth provided on the set lever 20, 20C is a start tooth, and 20d
are also rotating teeth, and the thickness of the start tooth 20c is approximately half that of the other teeth. Reference numeral 20e denotes an arm part, and by cutting a part of it in the thickness direction, a set surface 20f and a reset surface 20g are formed, and the blade lever 1
The rotating piece 18a of the blade shaft 18 attached to the blade shaft 6 is fitted and combined to drive the rotating piece 18a. 2l is a timing gear, which is rotatably attached to the base 50 by a support member (not shown). As shown in FIG. 7(B), the timing gear 2l has stop teeth 20a, 2 of the set lever 20 described above on a part of its outer periphery.
A stop cam 21a is provided for engagement with 0b. In addition, three types of drive 1#2lb+.
2lb2. 21b3 is formed, and a cap cam 21c for swinging a cap lever, which will be described later, is formed at a predetermined position. In addition, a piston set cam 21f for pressing the piston of the pump described later
A piston reset cam 21g is integrally formed at a predetermined interval in correspondence with the piston set cam 21f. Reference numeral 22 denotes an ink absorption spring, which is fixed at a predetermined position on the base 50, and as shown in FIG.
2b. , 23 is an ink absorber, which is made of a hydrophilic porous material like the ink carrier 19 described above. This ink absorber 23 is formed with a wiping portion 23a on which the blade 17 mentioned above comes into contact, and furthermore, an absorption surface 23b is formed on the lower part with which the above-mentioned ink carrier 19 comes into contact and transfers ink. . The absorber holding portion of the ink absorber spring 22 is biased upward with some elastic force, and is locked in a predetermined position by a stopper (not shown). Therefore,
When the ink carrier 19 mentioned above comes into contact with the ink absorber 23, the ink absorber spring 22 is bent and the ink absorber 23 is displaced downward, thereby ensuring the contact state. Next, the recovery system unit, which is one of the recovery system mechanisms, will be described mainly with reference to FIGS. 8 and 9. In FIGS. 8 and 9, 24 is a cylinder;
It has a cylindrical cylinder part 24a and a guide part 24b that guides a piston shaft, which will be described later.
b has an ink flow path 24 by cutting out a part in the axial direction.
c is formed. 24d is a cap lever receiver, and is shaped so that a lever seal, which will be described later, is fitted therein. Further, 24e is an ink flow path, and the cylinder portion 2
It opens at a predetermined position within 4a. Reference numeral 24f denotes a rotating lever, which is formed integrally with the cylinder 24 and is provided with a rotating force by the spring portion 2.2b of the ink absorber spring 22 described above. A waste ink pipe 24g is formed integrally with the cylinder 24, and its tip is cut into an acute angle so that it can be easily inserted into a waste ink absorber to be described later. 24b is an ink canal formed within the waste ink pipe 248. 25 is a cylinder cap, which is pressed onto the end of the cylinder 24. 25a is a lever guide, which is arranged at a position facing the cap lever receiver 24d of the cylinder 24 mentioned above. A piston seal 26 is fitted into the cylinder 24, and its inner diameter is made slightly smaller so as to obtain a predetermined pressure contact with the piston shaft, which will be described later. Further, the sliding force of the piston shaft may be reduced by applying a lubricating coating to the surface. 27 is a screw shaft, and the operation @ 2 7 a, piston holder 27 b. Piston receiver 27C, connection shaft 27d
．． A fi 27f serving as an ink flow path is formed along the connecting shaft 27d and the guide shaft 27g. 27g is a rotation stopper, which is formed as a groove in the operating shaft 27a. Further, a bearing portion 27h is provided at the end of the operating shaft 27a. 28 is a piston, and the main body forming the inner layer when viewed from the cylinder sliding part side is formed of an elastic porous material. These include foams with single pores (such as sponges) and porous bodies with continuous pores such as continuous microporous materials, but continuous microporous materials, such as open-cell foamed urethane foam, are preferable. It can be formed by Further, a plurality of continuous pores may exist in a direction crossing the direction of elastic deformation. The outer diameter thereof is formed to be larger than the inner diameter of the cylinder 24 by a predetermined amount, and when inserted into the cylinder 24, it is in an appropriately compressed state. Also, the outer peripheral surface 28a and the end surface 28b of the piston shaft 27 that comes into contact with the piston presser 27b.
The solid layer (skin film) used during foam molding of the piston is positioned in the piston. Here, even if the member forming the piston body is foamed and communicated, the skin film does not communicate with liquid and maintains airtightness, so the piston 28 fulfills its function. In addition, as long as it does not have a skin film, a film for maintaining airtightness may be separately provided. 42 is a bomb chamber. 29 is a piston pressing roller, and the piston! Encyclical can be freely attached to the end of TOk27 C
spelled out. 30 is a piston return roller, which is similarly attached to the end of the piston fII 127 so as to be rotatable. 3l is the axis of these rollers. 32 is a cap lever, and a rotating shaft 32a, an ink guide 32b, and a lever guide 32c are formed. In addition, the tip has a convex spherical sealing surface 32d.
is formed. Further, an engaging portion 32e for engaging with a claw of a cap holder, which will be described later, is provided as a pair of upper and lower members. Further, the ink flow path 32f passes through the inside of the lever from the sealing surface 32d, bends at a right angle halfway, passes through the center of the ink guide 32b, and opens at the end surface thereof. Note that a cutout 32g is provided on the lower side of the ink guide 32b. Reference numeral 33 denotes a lever seal, into which the ink guide 32b is fitted and which is press-fitted into the cap lever receiver 24d. 33a is a communication hole, which communicates the notch 32g of the ink guide 32b with the ink flow path 24c. 34 is a cap holder, and a hook 34a that engages with the engaging portion 32e of the cap lever 32 is provided at an opposing position. 34b is an opening for attaching a cap, which will be described later. 35 is a cap, and a cap portion 35a is formed which serves as both a sealing cap for preventing normal ink from drying and a suction cap for sucking ink.A suction port 35b is formed in the cap 35a. cap 35
It opens toward the cap holder 34 through the center of the cap holder. 35c is a flange portion, which prevents the cap from coming off when attached to the cap holder 34. Further, a concave spherical cap seal portion 35d having the same curvature as the sealing surface 32d of the cap lever 32 is formed on the flange portion 35c, and only the central opening communicates when the cap lever 32 is pressed. Then the others are sealed. Furthermore, since the seal portions (32d, 35d) are spherical, the cap member has an excellent equalization function.
Even if there is a step on the discharge port forming surface, the step can be immediately absorbed and a stable sealed state can be maintained. Now, referring again to FIG. 2, 36 is a paper feed roller for conveying a recording medium such as paper, and is made by applying an elastic paint (urethane resin, acrylic resin, etc.) to the surface of, for example, a drawn aluminum tube. It can be formed by Also,
The roller 36 functions on its outer surface as a platen that regulates the recording surface of the recording medium, and its interior serves as a storage section for waste ink. Reference numeral 37 denotes a waste ink absorbing section provided inside the roller 36, which is constructed by filling a thin tube made of plastic such as vinyl chloride with an absorbing material such as polyester cotton so that it can absorb ink well in the axial direction. Note that the waste ink pipe 24g of the cylinder 24 is inserted into the waste ink absorbing portion 37, but even if the recovery system mechanism moves with the movement of the base 50, the inside of the absorbing portion 37 should be kept to an extent that does not impede the movement. Supported by Further, the fibers of the absorbent material themselves are preferably made of a non-liquid absorbing material such as resin or metal, but may be slightly absorbent. 38 is fluorocarbon resin. Carbon fiber f: (t? From Bijinba et al./, () is a paper holding plate, which is divided into four parts and attached to the chassis 1 as detailed in Fig. 3. Shaft 3 for releasing the pressing force of the presser plate 38
A gear 38B is fixed to one end of the shaft 8^, and the other end engages with a bearing 38C that supports the shaft 388. The bearing 38c is fixed to the chassis 1. Note that a gear portion of a release lever meshes with the gear 380, but is not shown here. Reference numeral 39 denotes a paper feed motor, which is connected to the paper feed roller 36 via a speed reduction mechanism with a predetermined ratio. 40 is a recording paper such as paper or film. Next, the operation of the above configuration will be explained. First, during normal recording operation, the rotation of the shaft of the carrier motor l1 rotates the lead screw 2 through the tie belt 13, so that it engages with the lead groove 28 and the carrier 6 is moved in the printing digit direction by the dowel 7. 40 sheets of recording paper
scanned along. Here, since the carrier motor 11 is biased by the motor spring l4, the timing belt l3 is always tensioned and good transmission is achieved. When moving the front and rear wheels 6, an inertial force acts upon starting and stopping, but since the weight of the carrier motor 11 absorbs this inertial force, the load on the motor spring l4 is reduced.
The load applied to the rotation of the motor can also be reduced. Furthermore, if an air damper, hydraulic damper, or the like is provided in conjunction with this spring, noise caused by vibration of the rotor of the motor 1l can be reduced when the carrier 6 is started or stopped. By appropriately selecting the weight of the motor, the weight of the carrier portion, and the coefficient of the motor spring damper, overshoot of the rotor can be reduced and noise can be reduced. Next, the operation of this embodiment during non-recording will be explained with reference to FIGS. 10 to 16. FIG. 10 is a timing chart showing the operation timing of each part, and the operation timing of each part as shown can be determined by the number of pulses applied to the motor 11. FIG. H is a perspective view showing the detailed structure of the clutch gear 4 and the timing gear 2l described above. It slides on the lead screw 2 and rotates together with it. Further, the clutch gear 4 is biased toward the carrier 6 by a spring 5, and is normally in a predetermined position by the groove 21 of the lead screw 2 during recording and rotates together with the lead screw 2. When the recording head 9 moves to the home position, the clutch gear 4 is pushed by the carrier 6 and starts to engage with the timing gear 2l. The clutch gear 4 has a start tooth 4c and a normal drive tooth 4.
c, and the start tooth 4c and the drive tooth 4c2 are formed at different positions in the width direction of the clutch gear. Further, the driving teeth 4c2 are not formed in the same manner all around the gear, and a portion thereof has a curved surface portion 4b. Furthermore, at the end of the clutch gear 4, over the entire circumference,
A collar 4a is formed. As shown in FIG. 7(B), the timing gear 2l has a start south 21b1 and two M4 type driving teeth 2lb2, 211]3 in different positions, and these teeth 2i
bl, 2lb2. 21b are formed at different positions in the width direction of the gear 2l. Figures 12 (8) to (C), and Figure 13 (A),
(B) is a diagram illustrating a state in which the hinge latch gear 4 and the timing gear 21 are engaged with each other. During normal recording, Figures 12 (A) and 13 (A)
) is in the engaged state as shown in . However, at this time,
In FIG. 13(A), the lead pin 7 is not in this position, and the blade 17 and the ink carrier 19 are located above the ink absorber 23, although not shown. At this time, the clutch gear 4 rotates as the lead screw 2 rotates, but the start teeth 4c and 21b1 are not in a positional relationship to engage (Fig. 13(^))
reference). Therefore, the timing gear 2l does not rotate, and moreover, the driving tooth 21b2 and the collar 21h at the left end of the timing gear 21 are in a positional relationship where they can come into contact with the collar 4a of the clutch gear 4 with a slight gap. The timing gear 2l cannot rotate in either direction of force. As a result, even if some rotational force or artificial force is applied to the timing gear 2l, it will not rotate unexpectedly, and errors in the operating position of the recovery system mechanism can be prevented. can. When the recording head 9 moves toward the home position and the carrier 6 pushes the clutch gear 4, the positional relationship between the clutch gear 4 and the tying gear 21 is finally as shown in FIG. 13(B).
It becomes as shown in . In this process, the start@4c+ and 2lb+ are in a positional relationship where they can be engaged (however, at this time, the lead bin 7 is not yet in this position). Next, as the lead bin 7 moves from the groove 3c to the fi3b, the clutch gear 4 rotates clockwise in FIG. )
The state changes sequentially to the states shown in . At this time, start tooth 4
Until cl and 2lb are engaged, the curved surface part 4b as a non-meshing part shown in FIG. moves and the other drive teeth do not engage each other first. As a result, the gear meshing between the tillage gear 4 and the timing gear 2l always starts with the start teeth, and therefore, the rotation of the timing gear 2l always starts from the correct position. As a result, the recovery system mechanism driven via the timing gear 21 operates accurately. Further, there are advantages such as there being no need to increase the mounting accuracy of the clutch gear 4 and the timing gear 2l so much. In addition, as shown in FIG. 7(B), the timing gear 2l
Of the drive teeth, the drive tooth 2lb3 whose position is different is the drive tooth that engages when the curved surface portion 4b again comes into contact with the timing gear 2l. That is, normal drive tooth 2
If these driving teeth are located at the same position as 1b2, the curved surface portion 4b
Since the drive teeth come into contact with each other, the drive teeth are moved to engage each other. Further, while the driving teeth are engaged and the timing gear 2l is rotating, the hook 6c attached to the carrier 6 slides on the side surface of the timing gear 2l. Thereby, it is possible to prevent the recording head 9 from being scraped from the home position due to, for example, the lead pin 7 leaving the full position 3b before predetermined teeth engage with each other. This is because the lead screw rotates twice when the recording head 9 is at the home position and performs a series of recovery processes, so the lead bin 7 may move to the groove 30. In addition, in the above example, the series of recovery processing is performed using the lead screw 2.
Although the rotation is performed in this embodiment, the rotation is not limited to this, and any rotation can be set, thereby increasing the degree of freedom in designing the clutch mechanism and the like. Figures 14 (8) to (D) are explanatory diagrams showing the sequential operating states of the mechanisms related to the blade 17, etc., and Figures 15 (^) to (C
) are explanatory diagrams showing the sequential operating states of the mechanism related to the cap 35, and FIGS. The operation will be described with reference to these figures and the above-mentioned FIGS. 12 and 13. First, the carrier 6 moves toward the home position (in the direction of arrow B). At this time, as shown in FIG. 13(8)C, the lead bin 7 is engaged with the lead groove 2a, and the ejection port 9C of the head element 9a faces the ink carrier 19 (see FIG. 14(A)). It is located in the same position. At this position, all of the ejection energy generating elements of the head element 9a are driven to perform an ejection operation (hereinafter referred to as preliminary ejection), and the slightly thickened ink is ejected with the ejection force.
This preliminary ejection recovery operation can be completed. Preliminary ejection is also performed at this position, which is periodically performed to prevent ink from increasing viscosity in unused ejection ports during normal printing. Furthermore, Fig. 14(A) is a side view of the surrounding area at the same position. Furthermore, as shown in FIG. 13(B), when the lead screw 2 is rotated and the carrier 6 is moved in the direction B,
The clutch gear 4 is pressed by the pressing part 6a, and the
direction, and the start IfI4cl reaches a position where it can engage with the start i2lb of the timing gear 2]. Thereafter, the clutch gear 4 rotates in synchronization with the lead screw 2, the start screw is engaged, and the timing gear 21 rotates in the D direction as shown in FIG. 14(B). On the other hand, since the lead bin 7 has entered the position groove 3b from the introduction groove 3c, the carrier 6 does not move even if the lead screw 2 rotates. When the timing gear 21 rotates in the D direction, the gear part and the gear part of the set lever 20 are engaged, so the set lever 20 starts to rotate in the E direction. Up until this point, the hook portion 16c of the blade lever 16 is engaged with the claw portion of the chassis, so only the set lever 20 rotates.
Although the blade lever 16 is stopped, the set surface 2Of of the set lever 20 will eventually rotate in the F direction while pushing down the rotating piece 18a of the blade shaft l8, so the blade 17 will rotate in the G direction and discharge. Set into engagement with the exit surface. When the timing gear 2l further rotates in the D direction, the hook portion 16 of the plate lever 16 is disengaged from the pawl of the chassis, and the set lever 20 and blade lever 16 also rotate roughly, causing the blade l7 to rotate as shown in FIG. 14(C). The ejection port surface of the head 9 is wiped with the cleaning method. At this time, the ink liquid etc. removed by wiping the plate l7 is removed only in one direction, that is, only downward in this case, and the removed ink liquid etc. is absorbed or retained in the upper part of the ink xeria l9. Also, at this time, the ink carrier 19 begins to come into contact with the ink absorber 23. When the set lever 20 further rotates, as shown in FIG. 14(D),
Since the ink carrier 19 and the blade l7 slide on the surface of the wiping part 23a of the ink absorber 23, the ink received by the ink carrier l9 during preliminary ejection and the dust wiped by the blade 17 from the ejection orifice forming surface are removed. The ink droplets adhering to the ejection port surface are also absorbed by the wiping portion 23a. As a result, ink carrier l9
The ink absorbing ability of can retain its ability for long IVJ. Further, the timing gear 21 rotates in the D direction, but since the stops i20a, 20b of the set lever 20 and the stop cam 21a of the timing gear 21 face each other and contact each other, rotation of the set lever 20 is restricted. At the same time, since the driving teeth of the timing gear 21 are missing teeth, no rotation force is applied. As mentioned above, since the blade and the absorber that holds the ink liquid etc. removed by the blade are the same as the ink receiver during preliminary ejection, the device can be made smaller and the time required for these recovery operations can be shortened. can. When the timing gear 21 rotates further, the cap cam 21c of the timing gear 2l initially regulates the rotating shaft 32a of the cap lever 32c shown in FIG. 35 is stopped at a position away from the discharge port surface of the head element 9a. Next, when the timing gear 21 roughly rotates in the D direction, it comes off from the cap cam 21c, and the regulating state is released, so as shown in FIG. The cylinder 24 is urged by the spring portion 22b of the absorber spring 22 to rotate in the F direction, and the cap portion 35a of the cap 35 comes into pressure contact with the discharge port surface, completing the capping operation. (0
) shows a top view at this time. At this time, the seal member 32d and the cap seal portion 35d are also tightly sealed due to the pressing force of the cap. Now, the above is the cleaning and capping operation of the nozzle surface, and normally the nozzle surface is cleaned and the cap operation is stopped here, and the above operation is performed in reverse according to the human power of the next recording signal, and then the recording operation is started. Next, a suction recovery operation that is performed when the ejection condition is not improved even after preliminary ejection will be described. When starting this, the timing gear 21 is further rotated from the cap position, and the cap lever 32 is pressed by the cap cam 21f, so that the cap 35 is moved slightly one chamber away from the discharge port forming surface as shown in FIG. 15(C). let When the timing gear 2l further rotates in the D direction, it comes off the cap cam 21f again, so the cap portion 35a
comes into pressure contact with the discharge port surface. Now, regarding the bombing operation, when the recovery operation is started after the above-mentioned sealing cap is completed, the suction operation is started. At this time, first, the piston set cam 21g pushes the piston pressing roller 29 attached to the piston shaft 27 due to the rotation of the timing gear 2I, so the piston shaft 27
moves in the H direction as shown in FIG. 16(A). The piston 28 is then moved in the H direction by being pressed by the piston holder 27b, and the bomb chamber 42 is brought into a negative pressure state. Since there is a skin layer on the outer periphery of the piston 28 and the contact surface with the piston holder 27b, ink will not leak through the communication hole of the foam material. Further, the ink flow path 24e of the cylinder 24 is connected to the piston 28.
, the piston 28 is in a movable state only by increasing the negative pressure in the bomb chamber 42. on the other hand,
As shown in FIG. 16 (8) after the above-mentioned recapping, the ink flow path 24c is opened, so that the ink in the head 9 is sucked through the suction port 35b of the cap 35. The sucked ink passes through the ink flow path 32f formed inside the cap lever 32, passes through the communication hole of the lever seal 33,
The ink further flows into the bomb chamber 42 through the ink flow path 24e of the cylinder 24. When the timing gear 2l further rotates, the cap 35 is moved slightly away from the discharge port surface by the cap cam 21h again, and due to the residual negative pressure in the bomb chamber, the discharge port surface and the cap portion 35
The ink inside a is suctioned to eliminate any remaining ink in these areas. Next, when the timing gear 21 is rotated in the opposite direction (the direction indicated by the arrow I in FIG. 14(D)), the piston reset cam 21i pulls the piston return roller 30, and the first
Move the vist shaft 27 in the direction of arrow J as shown in Figure 6 (B). At this time, the piston 28 is connected to the piston shaft 27
Since the piston receiver 27c moves after they come into contact with each other, a gap Δ° C. is created between the end surface 28b of the piston 28 and the piston retainer 27b. The waste ink sucked into the bib chamber 42 by the movement of the piston shaft 27 and the piston 28 passes through the above-mentioned gap ΔL, passes through the groove 27f of the piston shaft,
The ink passes through the ink flow path 24c of the cylinder 24, and further passes through the waste ink pipe 24g, and is discharged near the center of the waste ink absorber 37. At this time, since the ink flow path 24e of the cylinder 24 is closed by the piston 28 at the beginning of the operation of the piston 28, waste ink does not flow back toward the cap. FIG. 17 collectively shows the sequence of the preliminary ejection or suction recovery described above. However, in the diagram, blade 1
7 is in a state where wiping is possible (set state. Fig. 14 (B
)), and after wiping, the blade l7 is tilted with respect to the absorber 23 (reset state. Fig. 14 (
^)), and then immediately before the set lever 20 returns to its original position, the blade l7 is brought into a set state in which wiping is possible. Next, with reference to FIGS. 3(A) and 3(B), the recording paper transport mechanism from recording to paper ejection of the wooden embodiment will be explained. This is a paper press plate made of a material mixed with resin, carbon fiber, etc., and applies a pressing force to the fed recording paper so that there is a predetermined distance between the ejection port surface of the recording head 9 and the recording paper. The pressing force of the paper press plate 38 is based on the elastic force of the spring plate 38D. The details of this mechanism are shown in Figure 18 (^) and (
8). FIG. 18 (8) is a diagram showing a state in which the paper pressing plate 38 is applying a pressing force to the paper feed roller. In this case, the spring plate 38 has a D-shape in which a part of the circumference is linearly cut out, and the notch part of the shaft 38^ that can be slid in the rotational direction with the paper press plate 38 is connected to the spring plate 38.
At this time, the end 38E of the paper press plate receives a biasing force upward in the figure from the spring plate 380 km. As a result, the paper press plate 38 is moved to the shaft 38.
The paper feed roller 36 attempts to rotate clockwise around ＾.
Apply pressing force to. On the other hand, FIG. 18(B) shows a state in which the pressing force exerted by the paper pressing plate 38 is released. In this case, IriIll3
88 rotates, and the arc portion of M 3 a A presses the end portion 38F. At this time, the entire spring plate 38D is pushed down in the figure. As a result, the end portion 38E
Does not receive biasing force from 8D. When this biasing force is released, @388 and the paper presser plate 38 are engaged with each other with a certain amount of frictional force, so that the paper presser plate 38 does not change its rotational position significantly. As a result, even when it becomes necessary to release the pressing force of the paper presser plate 38, the paper presser plate does not interfere with the movement of the recording head. Further, the paper pressing mechanism described above is a mechanism that can apply a pressing force that does not prevent the paper feed roller 36 from properly conveying the recording paper within a limited space. In other words, without using an elastic member in the paper press plate itself,
The pressing force is normally applied to the bottom chassis of the device, which is a dead space.
Since the force is generated by a leaf spring arranged along the top, the degree of freedom in setting the suppressing force is increased by adjusting the length of the leaf spring, and the paper pressing member can be made smaller. Note that the leaf spring 38D is attached to the chassis 1 by a fixing member (not shown). Referring again to Figure 3 (8) and ([I), 60
is a paper ejection roller for ejecting recorded recording paper, 6l
is a spur for applying a pressing force to the recording paper conveyed by the paper discharge roller 60, regulating the discharge direction of the recording paper, and generating a conveyance force. Reference numeral 62 denotes a transmission roller that is disposed at an intermediate portion between the paper ejection roller 60 and the paper feed roller 36 and transmits the rotation of the paper feed roller 36 to the paper ejection roller 60. These rotations are transmitted by frictional force caused by mutual contact. The paper ejection roller 60 has a cylindrical shape with different radii at both ends and a middle part, and the transmission roller 62 contacts the middle part of the paper ejection roller 60 with a smaller diameter. Therefore, both ends of the recording paper with the larger diameter, which carry the recording paper, rotate at a slightly higher circumferential speed than the circumferential speed of the paper feed roller 36. As a result,
When the recording paper is ejected, the recording paper is conveyed with tension, so that a good recording surface can be formed.6 Note that the rotation shafts of the transmission roller 62 and the spur 6I each have an appropriate elastic modulus. Uses a coil spring. The details of the mechanism will be explained with reference to FIG. 19, taking the case of the spur 6l as an example. In Fig. 19, 6l^ is a coil spring and the spur 6
Pass through the center of 1 and both ff! 11, and is rotatably engaged with the spur 6l. Reference numeral 103B is a shaft supporting member that pivotally supports both ends of the rotating shaft 61A, and is formed as a part of the inner M103 shown in FIG. The shaft support member 103B supports the shaft 61A slidably in the axial direction thereof. 103C is a regulating member for regulating the movement of the spur 6l in the direction of the rotation axis and in a direction perpendicular thereto;
provided on both sides of l. Regulation member io3c is also shaft support member 1
Like 03B, it is formed as part of inner M103. With the above configuration, the shaft 61A supports the spur 6l, and uses its bending elastic force to obtain a pressing force of the spur 6l against the paper ejection roller 60. The inner lid 103 has a spring member 103A at its rear end, as shown in FIG. Due to the interaction of this pressing force and the elastic force of the rotation 4i+h 6 1 8, the bar wheel 6l applies an appropriate pressing force to the paper ejection roller 60. In addition, when the inner Nto:+ receives the above pressing force,
As shown in FIG. 3 (^), the fixing member 103 of the inner lid 103
The engagement between D and the rotating shaft 60C of the paper ejection roller 60 is ensured. As a result, the positional relationship between the spur 61 and the paper discharge roller 60 is always kept constant. Alternatively, by fixing the rotary shaft 60C against a member for hanging, etc., a precise relationship can be maintained regardless of the precision of the inner cover. In the transmission roller 62, the rotary shaft 62A made of a coil spring has the same function, and the elastic force of the shaft 62^ provides a contact force to the paper feed roller 36 and the paper discharge roller 60. As described above, the paper discharge roller 60 has a shape in which the diameter of the middle portion is smaller than that of both ends. The details of this configuration are explained in the 20th
As shown in the figure. In FIG. 20, 60A is a cover member made of a rubber material, and 60D is a cylindrical core member with a diameter smaller at the middle than at both ends. The paper discharge roller 60 is formed by covering the core member 600 with a pipe-shaped cover member 608. As a result, it is not necessary to integrally mold such a shape with a rubber member or the like, and the paper ejection roller can be obtained relatively easily and at low cost. Note that the groove portion 60B that is continuously provided at one end of the paper ejection roller 60 can catch the terminal end of the recording paper when it is ejected by the paper ejection roller 60, and prevents the recording paper from being misaligned. This makes it possible to ensure that the paper is ejected reliably. Note that the shape of the core member 600 is not limited to the above-mentioned shape, and for example, it may be a shape that is an extension of the shape of the groove portion 60B with a smaller intermediate portion, or a cylindrical shape may be obtained by covering with a rubber material. Next, the case where the wood-based inkjet recording apparatus is used in an upright position will be explained with reference to FIGS. 21 and 22. When the apparatus is used in an upright position, there are cases in which it is used together with an auto feeder 200 as shown in these figures, and cases in which thick paper such as envelopes is fed from a paper feed port on the back side of the apparatus. In the case of ordinary recording paper that uses an all-feeder,
The upper lid 102 can be used as a stacker for ejected recording paper. At this time, as shown in the %x figure, the upper lid l0
2 is fixed at a different angle than when used as a paper guide for feeding paper. The conditions for using the upper M102 as a stacker are as follows. That is, the ejected recording paper is conveyed through the air to some extent by its own straining strength, and the position where it first contacts the upper i102 or the already stacked recording paper is located at the upper end 102 of the upper cover 102.
It should be near A. This allows the ejected recording paper to slide over the already stacked recording paper, etc., only at the leading edge of the recording paper, thereby avoiding sliding as much as possible, and preventing stains on the recording paper from unfixed ink. It can be prevented. The configuration for this purpose requires that the upper end 102A be located near the common tangent line of the paper feed roller 36 and the paper ejection roller 60 in the paper ejection direction, that is, in the case of a wooden example, and that the lower end 102B be lowered. Become. Further, when the trailing edge of the recording paper stopped on the upper end portion 102A is completely discharged, it is lowered at that position and stacked without sliding. The configuration for this includes the length of the upper ii l Q 2 in the paper ejection direction (the length from the upper end 102A to the lower end 102B).
is the requirement, and if commonly used recording paper is used and the paper is ejected almost horizontally like a wooden example, the length should be 60% to 90% of the length of the recording paper, more preferably 70% to 80% of the length of the recording paper.
%. Note that if the configuration of the recording apparatus or usage conditions are different and the paper ejection direction is different from the above, the length of the stacker may be determined while taking into account the first requirement. In addition, 108° shown in FIGS. 21 and 22 is
This is a piece to prevent entanglement, and the recording paper to be stacked is placed in the paper feed port 106.
can be prevented from entering. (Others) The present invention brings about excellent effects particularly in a bubble jet type recording head and recording apparatus among inkjet recording types. This is because such a system can achieve higher recording density and higher definition, and it is expected that the fixing speed will be even slower depending on the recording pattern. For its typical configuration and principle, see, for example, US Pat. No. 4,723,129. It is preferable to use the basic principle disclosed in the specification of the same No. 4740796. This method can be applied to both the so-called on-demand type and continuous type, but especially in the case of the on-demand type, it is necessary to arrange the liquid (ink) in accordance with the sheet and liquid path that hold it. The electrothermal converter that is
Generating thermal energy in the electrothermal transducer and producing film boiling on the thermally active surface of the recording head by applying at least one drive signal that corresponds to recorded information and provides a rapid temperature rise above nucleate boiling. As a result, bubbles in the liquid (ink) can be formed in one-to-one correspondence with this drive signal, which is effective. The growth and contraction of the bubble causes liquid (ink) to be ejected through the ejection opening to form at least one droplet. It is more preferable to use this drive signal in a pulse form, since the growth and contraction of bubbles can be carried out immediately and appropriately, making it possible to eject liquid (ink) with particularly excellent responsiveness. As this pulse-shaped drive signal, those described in US Pat. No. 4,463,359 and US Pat. No. 4,345,262 are suitable. Furthermore, if the conditions described in US Pat. No. 4,313,124 concerning the invention regarding the temperature increase rate of the heat acting surface are adopted, even more excellent recording can be performed. The configuration of the recording head includes ejection ports as disclosed in the above-mentioned specifications. Liquid path. US Pat. No. 4,558,333 discloses a combination configuration of electrothermal converters (straight liquid flow path or right angle liquid flow path) as well as a configuration in which a heat acting part is arranged in a bending region. The structure using the specification of US Pat. No. 4,459,600 is also included in the tree invention. In addition, Japanese Patent Application Laid-Open No. 1989-5 discloses a configuration in which a common slit is used as a discharge part of a plurality of electrothermal converters.
No. 9-123670 and Japanese Patent Application Laid-Open No. 59/1989 which discloses a configuration in which a discharge portion is made to correspond to an opening that absorbs pressure waves of thermal energy.
- The effects of the present invention are also effective even with a configuration based on Publication No. 138461. In other words, regardless of the form of the recording head, recording can be performed reliably and efficiently. Furthermore, the present invention can also be applied to a full-line type recording head having a length corresponding to the maximum width of a recording medium that can be recorded by a recording apparatus. Such a recording head may have either a configuration in which the length is satisfied by a combination of a plurality of recording heads, or a configuration as a single recording head formed integrally. In addition, even serial type recording heads such as the one mentioned above are replaceable chip-type recording heads that can be attached to the main body of the device to enable electrical connection to the main body of the device and supply of ink from the main body of the device. Alternatively, the present invention is also effective in case C where a cartridge type recording head is used which is integrally provided with the recording head itself. In addition, regarding the type and number of recording heads installed, for example, in addition to one type that corresponds to single-color ink, there is also a plurality of recording heads that correspond to multiple inks with different recording colors and densities. It may be something that can be done. In addition, the inkjet recording apparatus of the present invention can be used as an image output terminal for information processing equipment such as a computer, or as a copying apparatus combined with a reader or the like, or as a facsimile apparatus having a transmitting and receiving function. It is also possible to adopt the following. [Effects of the Invention] As is clear from the above description, according to the present invention, the discharged recording paper is conveyed in the air and first comes into contact with the upper end of the tray, and then slides on this upper end. Thereafter, when the trailing edge of the recording paper is discharged from the paper ejection port, the sliding stops and the trailing edge of the recording paper continues to fall downward. As a result, the ejected recording paper is stacked with the tray or the already stacked recording paper with the sliding part minimized, and the sliding part is where the previously recorded ink has been fixed. Since it is a part, it is possible to prevent ink stains caused by sliding. Furthermore, since the recording sheets are stacked at the rear by falling through the air, there is no sliding during the stacking operation, and ink stains and the like can be similarly prevented.

[Brief explanation of drawings]

1 is an external perspective view showing an embodiment of an inkjet recording apparatus according to the present invention; FIG. 2 is a perspective view showing the main parts of the apparatus shown in FIG. 1 with the cover removed; Figure 3 (8) is a perspective view mainly showing the paper ejection system of the apparatus shown in Figure 1, Figure 3 CB) is a side view of the figure shown in Figure 3 (^), and Figure 4 ( ^) and (B) are side views showing one embodiment of the recording head corresponding to the recording paper, respectively, and Figures 5 (^) and (B) are side views of the recording head at the home position corresponding to the recording paper, respectively. FIG. 6 is a partially cutaway perspective view showing an embodiment in which the base equipped with a recovery system mechanism is engaged with the chassis; FIGS. 7 (^) to (C) are records. FIGS. 8 and 9 are an exploded perspective view and a cross-sectional view, respectively, showing an example of a suction recovery system for the recording head. FIG. FIG. 11 is a timing chart showing the operation timing of each part according to the embodiment; FIG. 11 is a perspective view showing an embodiment of the clutch mechanism for transmitting driving force to the recovery system mechanism; FIGS.
C) is a side view showing the engagement state of the clutch gear, hook, and timing gear in the clutch mechanism shown in FIG. 11, and FIGS. 13(^) and (B) are front views similar to FIG. 12. , FIGS. 14(A) to 14(D) are side views for explaining the sequential operations of the blade and the ink carrier section, and FIG. 15(
8) to (C) are side views for explaining the sequential operations of the cap section, and FIGS. 16 (^) and (B) are side sectional views for explaining the operations of the bomb section for performing suction recovery. , FIG. 17 is a timing chart explaining the sequence during preliminary ejection or suction recovery processing according to this example (some other embodiments), and FIGS. 18 (A) and (B) are press operations of the paper presser plate. 19 is a side view showing an embodiment of the mechanism; FIG. 19 is a perspective view showing an embodiment of the supported state of the spur in the paper ejection system; FIG.
22 is a perspective view showing another example of the usage state of the wood example device, and FIG. 22 is a side sectional view of the state shown in FIG. 21. DESCRIPTION OF SYMBOLS 1...Chassis, 2...Lead screw 2a...Lead groove, 3a...Lead pulley, 3b...Position groove, 3C...Introduction groove, 4...Clutch gear, 5...・Clutch spring, 6...Carrier, 6C...Hook, 7...Lead bin, 9...Recording head, 9a---Head chip (discharge element) 9b...
Ink tank portion, 9c...Discharge port, 9d...Discharge port forming surface, 1L...Carrier motor, l3...Timing belt, 15...Set shaft, l6...Blade lever 17... - Blade, 19... Ink carrier, 20... Set lever 2l... Timing gear, 22... Ink absorber spring, 23... Ink absorber, 24... Cylinder, 27... Piston shaft, 28... Piston, 29... Piston pressing roller, 32... Cap lever 34... Cap holder, 35... Cap, 35a... Cap part, 38... Paper feed roller , 37... Waste ink absorber section, 38... Paper press plate, 40... Recording paper, 50... Base, 5l... Guide shaft, 80... Paper ejection roller, 6l... - Spur, 62...Transmission roller, 100...Inkjet recording device, 102...Upper lid, 103...Inner lid. Figure 3 (B) Figure 4 Figure 5 Figure 6 Figure 210 Figure 13 22a 90 Figure 15 Figure 18

Claims (1)

[Scope of Claims] 1) In an inkjet recording apparatus equipped with a tray for receiving discharged recording paper, the upper end of the tray is
An inkjet recording apparatus characterized in that the tray is located near a straight line forming a direction of paper discharge, a lower end thereof is located below a paper discharge port, and the length of the tray is shorter than the length of recording paper to be discharged. 2) The inkjet recording apparatus according to claim 1, wherein the tray comprises a lid member for covering the inside of the apparatus. 3) The inkjet recording apparatus according to claim 2, wherein a paper feed port is provided near the lower end of the tray, and a recording paper entrainment prevention piece is provided to block the paper feed port. 4) The length of the tray is 70% to 8% of the length of the recording paper.
The inkjet recording apparatus according to any one of claims 1 to 3, wherein the inkjet recording apparatus is 0%. 5) The inkjet recording device according to claim 1, wherein the recording head of the inkjet recording device ejects ink droplets using heat generated by an electrothermal transducer.