JP2002192711A - Ink jet recorder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an ink jet recorder which can stably transfer a plurality of kinds of media including relatively unbending ones to be recorded. SOLUTION: Guide plates 7, 8, 9, 10, 43 and 13 form a first transfer route having a U shape seen from sideways and passing a lower part, one side face part and an upper part of the ink jet recorder 1. An ink supply means 47 is arranged in a space surrounded by the first transfer route. The first transfer route is made relatively long in an up-down direction, resulting in enabling a radius of curvature of curve routes 7a and 9b to be made relatively large. A transfer resistance applied at the transfer route to a recording paper 2 can be restricted to be small, and therefore even relatively unbending media to be recorded can be transferred stably and favorably.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ink jet recording apparatus for recording on a recording medium by an ink jet recording method while conveying the recording medium.

[0002]

2. Description of the Related Art FIG. 6 is a schematic sectional view of a conventional ink jet recording apparatus.

In this ink jet recording apparatus 100,
The stacked unused recording papers 101 are placed on a paper feed tray 116 arranged at the lower left of FIG.
02 and is set. A separation roller 103 is provided at the upper right end of the paper feed tray 116. The recording paper 101 set on the paper feed tray 116 is
2 rises and the separation roller 103 makes one rotation counterclockwise in a state where the recording paper 101 is in contact with the separation roller 103, whereby the uppermost sheet is separated and fed out by a predetermined amount to the right.

A pair of transport rollers 113 is provided on the right side of the separation roller 103. 1 recording sheet 101 fed out by the separation roller 103, the conveying roller 11
After being inserted between the rollers 3, the conveyance roller 113 is driven to rotate, thereby being further conveyed rightward.

At the exit of the transport roller 113, the recording paper 10
A guide plate 104 forming one transport path is arranged. The guide plate 104 includes a substantially semicircular curved path portion 104 a for changing the traveling direction of the recording paper 101 conveyed rightward by the conveying roller 113 by 180 degrees, and a curved path portion 1.
Continuously provided in 04a, it is made from a straight path portion 104b for guiding the 180-degree course change recording sheets 101 to the left.

At the exit of the guide plate 104, a guide plate 10
The recording sheet 101 guided by 4, two pairs of sub-scanning rollers intermittently conveyed by a predetermined amount in the left direction during recording 10
6,108 are provided. Sub scanning roller 106, 1
Between 08, an ink jet recording head 110 and a platen plate 112 are arranged.

The ink jet recording head 110 is mounted on a carriage (not shown). The carriage can be moved in a direction substantially perpendicular to the direction in which the recording paper 101 is conveyed (a direction perpendicular to the plane of FIG. 6) by a carriage guide (not shown) arranged substantially parallel to the rotation axes of the sub-scan rollers 106 and 108. Is held. The carriage is a sub-scanning roller 1
06, 108 when the intermittent conveyance is stopped. At this time, the recording paper 10 guided on the platen plate 112 is moved.
Ink is ejected from the inkjet recording head 110 to perform recording. A discharge tray 115 is provided at the exit of the sub-scanning roller 108, and the recording paper 101 discharged from the sub-scanning roller 108 after the recording is completed is placed thereon.

The ink jet recording head 110 is connected to an on-carriage tank 111 for storing ink supplied thereto.
10 together with the carriage. Further, a plurality of ink tanks 117 containing ink to be supplied to the on-carriage tank 111 are provided on both sides of the paper feed tray 116 when viewed from the front A of the apparatus. The ink tank 117 is detachable from the ink jet recording apparatus 100.

FIG. 6 is a side view of the apparatus of the prior art having the above-described structure.
To access the device from

In a conventional ink jet recording apparatus, various recording media can be used. For example, plain paper, glossy paper, a transparent sheet for OHP, glossy film, postcard, envelope,
Seal paper or the like is used. Conventionally, in order to properly use such various recording media, when a recording medium other than plain paper that is normally used is used, a manual paper feed port for inserting such a recording medium is provided. It is provided on the front of the apparatus, and the recording medium is manually positioned one by one on an unused recording paper 101 by a guide (not shown) and set.

[0011]

However, the configuration of the conventional ink jet recording apparatus has the following problems.

[0012] Conventional ink jet recording apparatus, the front of the apparatus A side apparatus the recording sheet conveyed (FIG. 6 left) back B
By passing through the curved path portion 104a having a relatively small radius of curvature on the side (right side in FIG. 6), the transport direction is reversed while bending the recording medium, and the recording medium is discharged to the front A of the apparatus.
In such a configuration, when a relatively thick recording medium such as glossy paper, a glossy film, or a postcard is conveyed or a recording medium having a relatively high elastic coefficient is conveyed, resistance generated by bending the recording medium increases. Therefore, often the resistance force is excessive in comparison with the conveying force, the failure of such a conveyance failure or jamming was prone configuration.

This will be described with reference to FIGS. First, the ink jet recording apparatus 1 shown in FIG.
00, the motion of the recording paper 101 conveyed in the guide plate 104 is considered. At this time, the recording paper 101 is guided along the surface of the guide plate 104, therefore, the recording paper 10
Considering the movement of the arbitrary point with a 1, this point can be regarded as moving along a continuous curve trajectory of the guide plate to a plane perpendicular to the central axis of the curved surface 104. FIG.
FIG. 3 is a diagram showing a motion of an arbitrary point on the recording paper 101 as such a motion model.

This point corresponds to the short time dt shown in FIG.
As shown in the figure, a small distance ds from the point A along the movement path
Consider a movement that moves to a point A ′ which is only a distance away. This movement can be regarded as a movement of a small angle dθ along a circular arc trajectory with a radius of curvature ρ around the center of curvature O at the point A between the small distances ds.

[0015]

(Equation 1) It can be expressed as. Change during this period of the velocity vector of this point, as shown in FIG. 7 (b), divided into a tangential component dv _t orbit, the normal component dv _n toward the point A to the center of curvature O of this point Thinking,

[0016]

(Equation 2) It can be expressed as. Further, the acceleration vector of this point in time this also, as shown in FIG. 7 (c), the tangential component da _t orbit, the catch is divided into the normal direction da _n

[0017]

(Equation 3) It can be expressed as. From now on, the centripetal force P _{1 of} this exercise
It can be expressed as P ₁ = ma _n, is inversely proportional to the radius of curvature [rho.

The centripetal P _1, the guide plate 104 is a pushing force in a direction perpendicular to this point on the contact surface, i.e. a drag,
Therefore, between the recording paper 101 this point, when the friction coefficient is mu, working friction .mu.P _1, but this is the resistance of the conveyor. As described above, since P ₁ is inversely proportional to the radius of curvature ρ, the smaller the radius of curvature, the greater the resistance.

Further, the drag acting on the recording paper 101 is not only the drag P ₁ due to the movement of the recording paper 1, but also the drag P ₂ generated by the restoring force caused by the recording paper 101 being bent from a flat state. Is added.

When this drag P ₂ is approximated by the bending characteristic of the arcuate cantilever spring, as shown in FIG. 8, the recording paper 1 bent in an arc shape from the clamping portion by the transport roller 113 is used.
01, between the reaction force P ₂ applied at the point of the central angle (deflection angle) θ from the holding portion and the amount of deflection δ,

[0021]

(Equation 4) There is a relationship. From now on, the drag P ₂ will be

[0022]

(Equation 5) Can be expressed as From this equation, the drag P ₂ is the amount of deflection δ, the recording paper 1
It can be seen that the larger the thickness h, the width b, and the elastic modulus E of No. 01 are, the larger the value becomes. In this specification, such a thickness, a width,
Large elastic modulus, the recording sheet drag P ₂ is greater by a restoring force, called the waist strong paper.

When the recording paper 101 is conveyed, a certain point of the recording paper is changed to a guide plate 104 forming a curved conveyance path.
Drag P receiving from a drag P ₁ due to the motion, the sum of the drag P ₂ by the restoring force. Therefore, the resistance μP applied to the recording paper 101 is μP = μ (P ₁ + P ₂ ). Further, the resistance applied to the entire recording paper 101 is:
The resistance μP at each point is integrated for all points in contact with the guide plate 104. Therefore, when the guide plate 104 has a continuous curved path, the larger the bending angle of the curved path, the larger the recording paper 10
1 increases.

[0024] From the above, the recording sheet 101 has a strong its stiffness, small curvature radius of the bend of the conveying path, also susceptible to resistance the larger bending angle.

The conventional ink jet recording apparatus 10
In the case of 0, when a failure such as a conveyance failure or a jam occurs, the recording paper 101 is removed by the operator from the direction of the back surface B of the apparatus, so that the workability is very poor. That device front operator who was operating the inkjet recording apparatus 100 from the direction of A, it is necessary to access goes around toward the rear of the unit B in order to get rid of it when a failure as described above occurs Was. In particular, in recent years, there has been a tendency to increase the size of recording paper. For example, in the case where recording paper of A3 size or the like is used, the recording device becomes large and the distance from the front A to the back B becomes long. The workability of the fault handling to be performed is further deteriorated.

In the case where an ink jet recording apparatus is provided with a substantially straight conveyance path with a small curved portion in order to reduce the resistance, a paper feed having a length substantially equal to the length of the recording paper is provided. This requires a copy unit, a paper discharge unit, and a recording transport unit, which results in a device that requires a long installation place and is difficult to install. In particular, when an apparatus that performs recording on a large-size recording paper is configured in this way, for example, if an A3-size recording paper is used, a depth dimension of about 1 m is required. The accessibility of the person also deteriorates.

The conventional ink jet recording apparatus 10
In the case of 0, since the ink tanks 117 are arranged on both sides of the paper feed tray 116, the width of the recording apparatus becomes large.

The present invention has been made in view of the above conventional example, and an object of the present invention is to stably convey a plurality of types of recording media including those having relatively strong stiffness, and An object of the present invention is to provide an ink jet recording apparatus which is small and has good workability during maintenance.

[0029]

In order to achieve the above object, an ink jet recording apparatus of the present invention comprises a conveying means for conveying a recording medium to a recording section where recording is performed by an ink jet recording head; An ink tank that holds the ink to be supplied, an ink tank holding unit that holds the ink tank, and an ink supply unit that includes an ink transport unit that circulates the ink, and has a restoring force that attempts to return straight when curved. Is an inkjet recording apparatus in which a plurality of types of recording media different from each other are used, wherein the conveying means is viewed from the front of the apparatus.
It has a first U-shaped transport path in the horizontal direction passing through the lower part, the upper part, and the vicinity of one side face of the apparatus, and the ink supply means is disposed in a space surrounded by the first transport path. It is characterized by the following.

As described above, by disposing the ink supply means in the space surrounded by the horizontal U-shaped first transport path, the first transport path becomes relatively long in the height direction. The radius of curvature of the curved path portion of the path can be relatively large, and the transport resistance can be reduced. Further, a straight path portion extending substantially straight in the height direction can be provided in a portion of the first transport path passing through the side surface of the apparatus. The path can be changed by 180 degrees to form a conveyance path that changes the path of the recording medium by about 180 degrees as a whole, and the conveyance resistance in the first conveyance path is substantially continuous as in the conventional example. It can be made much smaller than the case where the course is changed by about 180 ° at the section.

As described above, since the transport resistance can be reduced,
An ink jet recording apparatus which can satisfactorily convey even a recording medium having a strong stiffness and can satisfactorily convey and record on a plurality of types of recording media having different stiffnesses can be provided.

Further, since the first transport path is arranged so as to form a horizontal U-shape when viewed from the front of the apparatus,
It is possible to easily access the inside of the transport path from the front or side of the apparatus without going around the back of the apparatus, thereby facilitating the handling of faults such as poor transport and jams.

As the plurality of types of recording media, those having different stiffnesses due to different elastic coefficients can be used. According to the present invention, in particular, even when a film of a resin base material having a relatively large elastic coefficient is used as a recording medium, it can be favorably conveyed and recorded.

Further, even when the thickness and width of the recording medium are different, the stiffness is different. In the ink jet recording apparatus of the present invention, since the sizes are different from each other, a plurality of stiffnesses are different from each other. It is possible to satisfactorily convey and record the kind of recording medium.

As a more specific configuration of an ink jet recording apparatus using a plurality of types of recording media having different stiffness, an ink jet recording apparatus using two types of recording media may be arranged in the middle of the first transport path. A second transport path that joins, a first paper feed tray that holds a recording medium that is introduced into the first transport path, and a second paper tray that holds a recording medium that is introduced into the second transport path. Paper feed tray and the first
The paper feed tray and relatively lower back for a strong recording medium, the second
Of paper feed trays for recording media having relatively low stiffness. As described above, by adopting a configuration in which the recording medium having a relatively strong stiffness and in which the conveyance resistance is likely to be generated is conveyed through the first conveyance path which can have a relatively large radius of curvature, such a recording medium is used. the can also be carried out satisfactorily conveyed and recorded.

In the ink jet recording apparatus of the present invention, if the ink supply means is integrally connectable and detachable with respect to the apparatus main body, assembling work at the time of manufacturing is facilitated and workability at the time of maintenance is improved. Can be done. That is, at the time of manufacture after assembling the other parts of the ink supply means and the ink jet recording apparatus separately, it is possible to attach the ink supply unit easily to the last ink-jet recording apparatus. Further, during maintenance, by removing the ink supply means, access to other parts of the ink supply means and the ink jet recording means is facilitated, thereby improving the workability.

Further, by providing a structure in which the ink supply means and the electric parts in the apparatus are separated, it is possible to prevent the ink from contacting the electric parts when the ink leaks from the ink supply means. Accordingly, it is possible to prevent the occurrence of a short circuit or the like due to the contact of the electrical component with the ink, and to improve the reliability of the electrical operation of the electrical component.

[0038]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below in detail with reference to the drawings.

(First Embodiment) FIGS. 1 to 3 show an ink jet recording apparatus 1 according to a first embodiment of the present invention. 1 is a front sectional view, FIG. 2 is a plan sectional view, FIG.
FIG. 3 is a perspective view partially showing through. In the following embodiments, the recording medium will be described as recording papers 2 and 24. However, the recording papers 2 and 24 are not limited to ordinary recording paper, but may be a resin sheet such as OHP or a film of a resin base material. , or is intended to include various recording sheets having been subjected to special coating.

The ink jet recording apparatus 1 of the present embodiment
Has a recording paper transport unit, a recording unit 46, an ink supply unit 47, and the like, and these are housed in an apparatus case forming the outer periphery of the inkjet recording apparatus 1. The ink-jet recording apparatus 1 is for conveying the recording sheet 2,24 by the conveying means, for recording an image by depositing ink is ejected by the recording unit 46 with respect thereto, in the recording unit 46 Is ink supply means 4
7 Thus the ink is supplied.

Next, first, the ink jet recording apparatus 1
The configuration of the recording paper conveying means will be described. This transport means includes a first transport path for transporting the recording paper 2 from a paper feed cassette (first paper tray) 3 disposed at the lower left to a recording unit 46 at an upper part, and a manual feed path for recording paper 24 at an upper right. And a second transport path for transporting the sheet from the pressure plate 23 constituting the paper tray (second paper feed tray) to the recording unit 46. These transport paths are formed between two opposing guide plates.

A paper feed cassette 3 in which unused recording papers 2 to be introduced into the first transport path are stacked and stored is removably mounted near the bottom of the apparatus. Paper cassette 3
A suction cup 4 is provided above the right end of the suction cup. This sucker 4
Is vertically movable by a suction cup moving mechanism (not shown) housed in the separation unit 44, and is capable of adsorbing the recording paper 2 by a suction mechanism.

[0043] from the vicinity of this sucker 4, guide plates 7 and 8,
The recording unit 46 provided on the upper part according to 9, 10, 13
Is formed. Guide plate 7,
Numeral 8 extends rightward from the vicinity of the suction cup 4, bends upward near the side of the apparatus (curved path section 7a), and extends upward along the side surface of the apparatus case (linear path section 7b). The guide plates 9 and 10 extend slightly upward from the upper ends of the guide plates 7 and 8 along the side surface of the apparatus case so as to be continuous therewith (a straight path portion 9a), and the guide plate 10 is formed in the middle of the guide plate. 43. And the guide plates 9 and 1
Numerals 0 and 43 are bent leftward at the upper part of the apparatus case (curved path portion 9b). And the guide plate 13 is a guide plate 9,
43, a slight gap is left from the left end, and extends substantially horizontally toward the recording portion at the upper part of the apparatus case so as to be continuous therewith (the straight path portion 13a).

Conveying rollers 5 and 6 are provided at portions where the recording paper 2 is introduced from the suction cups 4 to the guide plates 7 and 8, and convey rollers 41 are provided at gaps between the guide plates 7 and 8 and the guide plates 9 and 10.
However, transport rollers 11 are provided in gaps between the guide plates 9 and 10 and the guide plate 13, respectively. The side surface of the apparatus casing, openable jam cover 35 is provided to rotate around the supporting point 36. Guide plates 8, 10
Is fixed to the jam cover 35, and when the jam cover 35 is opened, the side transport path is opened.

The pressure plate 23 on which the unrecorded recording paper 24 to be introduced into the second conveyance path is placed is provided on the upper right side of the apparatus case so that the placement surface of the recording paper 24 rises obliquely upward to the right. Have been. The bottom left above the pressure plate 23 separating roller 25 is provided. The second transport path is formed by a guide plate 26 provided from the vicinity of the separation roller 25 to the inside of the apparatus case, and the guide plate 13 shared with the first transport path. The guide plate 26 bends obliquely downward from the left to the horizontal direction, and the lower guide plate is a guide plate 4 that forms a first transport path at an end.
3 to be connected.

Next, the configuration of the recording section 46 provided on the upper part of the apparatus case will be described. The sub-scanning rollers 15 and 17 for intermittent conveyance of the recording papers 2 and 24 are provided in the recording unit 46.
It is provided near an inlet and an outlet near the recording unit 46. Between the two sub-scanning rollers, a platen plate 21 for regulating the position of the recording sheets 2 and 24 to an appropriate position during intermittent feeding.
Is provided. These transport the recording papers 2 and 24 in the recording section 46. At the exit of the recording unit 46, there is provided a paper discharge tray 22 on which the recording papers 2, 24 discharged by the sub-scanning roller 17 after the recording is completed are placed. A first transport path and the second transport path,
Recording sheet conveying path 40 formed by a conveying portion of the recording portion 46, when viewed from above, as shown in FIG. 2, extend across the ink-jet recording apparatus 1 from right to left.

An on-carriage tank 20 for holding ink is connected above the platen plate 21, and a recording head 19 mounted on a carriage 49 is arranged therewith. The required number of on-carriage tanks 20 is provided according to the type of ink. The carriage 49 is held by a carriage guide 42 disposed substantially parallel to the rotation axes of the sub-scanning roller 15 and the sub-scanning roller 17, and is arranged in a direction substantially perpendicular to the recording paper conveyance direction (in the plane of FIG. 1). It can move in a vertical direction (up and down direction in FIG. 2). The carriage 49 is movable between a point g on the back G side and a point e on the front F side of the printing apparatus.

The recording section 46 occupies a portion indicated by oblique lines in FIGS. 1 and 2, and this portion is substantially isolated from other portions in the apparatus by the partition wall 45 and the platen plate 21. The partition wall 45 and the platen plate 21 are made of a heat insulating member. Therefore, the recording section 46 is spatially isolated from other portions and also thermally isolated.

Next, the ink supply means 47 will be described. The ink supply means includes an ink tank 29 for holding ink to be supplied to the on-carriage tank 20, an ink tank storage unit (ink tank holding means) 28 for holding the ink tank 29, and a supply from the ink tank 29 to the on-carriage tank 20. A sub-tank 33 for temporarily storing the ink to be discharged, and a pump section (ink conveying means) 32 for flowing out and flowing the ink from each tank. The ink supply unit 47 is disposed in a space surrounded by the first transport path of the above-described transport unit.

The ink tank 29 is detachable from the recording apparatus 1. When the ink runs out, the ink tank 29 is taken out of the apparatus, and another ink tank 29 containing new ink is loaded. Replenishment of ink can be performed. In the present embodiment, six ink tanks 29 containing different types of ink are accommodated in the apparatus.

The number of ink tanks 29 is not limited to six, and the type of ink may be any of color ink, color light and dark ink, and monochrome light and dark ink. or the like liquid to enhance the water resistance by. Or it may be provided plural in accordance with the consumption of the ink tank 29 for storing the ink of the same color.

The sub tank 33 is provided with the ink tank 29.
The ink is temporarily stored, and is supplied to the on-carriage tank 20 on the recording head 19 from here. The sub tank 33 is the ink tank 29
The required number is provided in accordance with the number of ink types.

A recovery system unit 34 is attached to the ink supply means. This recovery unit 34
A protective cap for protecting and cleaning the recording head 19 when not in use; a protective cap for covering the nozzle portion of the recording head 19 except for recording; a suction cap for sucking ink adsorbed on the nozzle portion; And wiping means for wiping.

Below the ink supply means 47 and the recovery system unit 34, there is provided an ink receiver 37 which receives the ink leaked from them and guides the received ink to a waste ink tank or a waste ink absorber (not shown). . The ink receiver 37 has a dish-like shape that covers the lower part of the recovery system unit 34 and the ink supply means 47, and has a structure in which ink leaked from these portions flows into the ink receiver 37. Therefore, even when the ink leaks inside the ink jet recording apparatus 1, it is possible to prevent the ink from flowing out of the apparatus.

There is also a tube (not shown) for supplying ink from the sub tank 33 to the on-carriage tank 20, but this tube is also located above the ink receiver 37, and the tube is supplied from the sub tank 33. even leaking ink in the process leading to the on-carriage tank 20 through, leaked ink is recovered in the ink receiving 37, it is guided to the waste ink tank or the waste ink absorber.
Therefore, even in the event the leakage of ink, the leakage of the ink to the outside of the device can be prevented.

The ink receiver 37 is a base for the ink supply means 47 and the recovery system unit 34. That is, the ink supply means 47 including the tank storage section 28, the sub tank 33, and the pump section 32, and the recovery system unit 3
At least a part of the base 4 is integrally connected to the ink receiver 37 as a base. The ink supply means 47 and the recovery system unit 34 are detachably attached to the inkjet recording apparatus 1 in a state where they are integrally connected.

The ink supply means 47, the recovery system unit 34, and the ink receiver 37 are all arranged in a space surrounded by the transport path. Therefore, compared with the conventional example in which the ink tank 29 on both sides of the paper feed tray 3 is arranged, by increasing the height of the ink jet recording apparatus 1 can reduce the width, reduce the installation area of the apparatus can do.

As shown in FIG. 2, a power supply case 38 and an electrical case 3 are provided inside the ink jet recording apparatus 1.
9 are provided. The power supply case 38 accommodates a power supply 44 for supplying electric power for performing the operation of each unit of the ink jet recording apparatus 1. The electric case 39 includes a control unit for controlling each unit and a signal for processing image signals. An electric circuit 48 such as a processing unit is accommodated. In both cases, the radiation and penetration of the electromagnetic wave can be suppressed, and the penetration of the ink can be reduced when ink leakage occurs. Further, the power supply case 38 and the electrical case 39 are arranged at positions shifted from the ink supply means 47 and the ink receiver 37 so as not to overlap in plan. Therefore, even if ink leaks from the ink supply means 47 or the ink receiver 37, the possibility of ink being applied to the power supply case 38 or the electrical case 39 is small. Electric circuit 4
There is almost no risk that ink will adhere to electrical components such as 8 to cause a short circuit. Although not shown,
Driving sources such as a conveying roller and a carriage are also arranged behind the recording apparatus shown in FIG. 2i at a position which does not overlap the ink supply means and the ink receiver in a plan view.

In addition, the recording section 46 performs intake and exhaust from outside independently of the other portions. A dust filter is provided in the intake section to prevent dust from entering from outside. The recording unit 46
As described above, other parts inside the apparatus are spatially separated from each other, and have a dustproof structure for preventing intrusion of dust from the inside. Therefore, the periphery of the recording head is in a favorable environment with less dust.

The dustproof structure will be described in detail with reference to FIG. 3. An intake fan motor 51 is provided at the end of the recording unit 46 on the front side F of the apparatus and the end on the rear side G of the apparatus. . The intake fan motor 51 is exposed to the outside and is used for intake from outside. An intake filter 52 is provided at an air intake port of the intake fan motor 51, and the intake fan motor 51 is connected to the intake duct 5.
3 is connected. The intake duct 53 has a connection portion 53b with the intake fan motor 51, a pipe portion 53c for guiding the sucked air into the recording portion 46, and an opening 53a for ejecting the guided air obliquely downward. are doing.

Therefore, when the outside cool air is sucked from the air suction port by the suction fan motor 51, first, dust entering from the outside is filtered by the suction filter 52.
Captured by Then, the sucked air passes through the intake duct 53 and is ejected obliquely downward from an opening 53 a located near the upper portion of the sub-scanning roller 15.

These suction members are arranged substantially symmetrically at the front and rear portions of the ink jet recording apparatus 1, and are arranged within the moving range of the recording head, particularly the recording paper transport path 4.
The air flow can be created evenly in the vicinity of the platen plate 21 where the recording is performed because the zero passes.

The exhaust fan motor 55 provided on the back surface G side of the ink jet recording apparatus 1 is used to exhaust the internal high-temperature air. Exhaust fan motor 55
Is connected to an exhaust duct 57, and an exhaust filter 56 is provided at the air exhaust port. Exhaust duct 57
Sucks the internal air from the upper left near the sub-scan roller 17 as viewed from the front F of the ink jet recording apparatus 1. The exhaust duct 57 has an opening 57 for sucking air inside.
a, a pipe portion 57 c for guiding the sucked air to the exhaust fan motor 55, and a connection portion 5 between the exhaust fan motor 55 and the pipe portion 57 c.
7b. When the air inside the recording unit 46 is sucked by the exhaust fan motor 55, fine ink particles generated during recording and floating without reaching the recording paper 2 are captured by the exhaust filter 56. Then, the air passing through the exhaust duct 57 and passing through the exhaust filter 56 is discharged to the outside from the air discharge port.

With these configurations, high-temperature air inside the recording unit 46 can be discharged, and cool air can be taken in from the outside, so that a rise in temperature due to heat generation inside the recording unit 46 can be suppressed.

Generally, when the temperature inside the recording section 46 rises to a certain degree, the ejection accuracy of the recording head 19 tends to deteriorate, and the service life tends to be shortened.
Recording head 1 with high accuracy by keeping the inside of 6 at the optimum temperature for recording
9 can be operated, and the life of the recording head 19 can be maximized. Further, by capturing dust from the outside by the intake filter 52 and capturing fine ink particles floating inside the recording unit 46 by the exhaust filter 56, the inside of the recording unit 46 can be kept clean. Thereby, the recording head 19
It is possible to prevent the ejection position of the ink ejected from the nozzle from being shifted due to the adhesion of dust to the recording head, and to prevent the ejection failure due to the clogging of the recording head 19, thereby improving the reliability of the operation of the recording head 19. Thus, high-quality recording can be achieved.

Next, an outline of the operation of the ink jet recording apparatus 1 according to the first embodiment of the present invention having the above configuration will be described below.

First, the conveyance and recording operation of the recording sheets 2 and 24 will be described.

First, the case where the recording paper 2 stored in the paper feed tray 3 below the ink jet recording apparatus 1 is selected for recording will be described. In the initial state, the suction cup 4 is located at the position a and the transport roller 6 is located at the position d. When recording start is instructed, the suction cup 4 is moved from the position a to the position b by a suction cup moving mechanism (not shown) so that the suction cup 4 hits the uppermost sheet of the recording paper 2 stacked on the paper feed tray 3. It is contact. Next, the uppermost recording paper 2 is sucked to the suction cup 4 by a suction mechanism (not shown). Then, after the suction cup 4 is moved to the position above the a by the suction cup moving mechanism, conveying roller 6, which have been saved to the position of d is moved to the position of c, by the conveying rollers 5 and 6, the suction suckers 4 The leading end of one recording sheet 2 is clamped. Here, the suction by the suction cup 4 is released, and the recording paper 2 is released. The transport rollers 5 and 6 are driven to rotate by a transport motor (not shown).

The recording paper 2 fed by the rotation of the conveying rollers 5 and 6 advances along the curved path portion 7a formed by the guide plates 7 and 8 from the right to the upper direction.
The state at this time is shown in FIG. In this embodiment,
The first transport path can be lengthened in the height direction by an amount corresponding to the arrangement of the ink supply means 47 in a portion surrounded by the first transport path. Therefore, the radius of curvature ρ ′ of the curved path section 7a can be made larger than the radius of curvature ρ of the conventional curved path section 104a shown in FIG. Therefore, the drag P ₂ ′ acting on the recording paper 2 by the restoring force can be made smaller than the drag P ₂ acting on the recording paper 101 in the conventional example. Also,
Whereas the bending angle of the conventional curved path portion 104a is about 180 °, the bending angle of the curved path portion 7a is as small as approximately 90 °. For these reasons, the resistance of the recording paper 2 at the curved path portion 7a can be significantly reduced as compared with the conventional example.

Here, the drag acting on the recording paper 2 increases as the elastic modulus, thickness, width and the like of the recording paper 2 increase and the stiffness increases. Therefore, it is desirable that the radius of curvature of the curved path portion 7a be set larger as the recording paper 2 is conveyed more strongly, so that the drag is strong and the conveyance resistance is not excessively increased. Thus to suppress the conveyance resistance by, it can prevent the occurrence of conveyance failure.

The recording paper 2 whose course has been changed in this way
Is further fed by the transport rollers 5 and 6, and the leading end thereof is sandwiched by the transport rollers 41. The transport roller 41 is also rotated by a transport motor (not shown) in the same manner as the transport rollers 5 and 6, so that the recording paper 2 is guided by the guide plates 9 and 10 and the guide plates 43.
And the recording paper 2 reaches the transport roller 11. The transport roller 11 is also rotated by a transport motor (not shown), like the transport rollers 5 and 6, and advances the recording paper 2 in the transport path formed by the guide plate 13 to the left in the figure.

At this time, the recording paper 2 is conveyed while the traveling direction is changed from the upper direction to the left direction in the curved path section 9b.
The state at this time is shown in FIG. At this time, the drag exerted on the recording paper 2 by the restoring force can be made relatively small because the radius of curvature ρ ′ of the curved path portion 9b can be made larger than that of the conventional example, and is equivalent to the drag P ₂ ′ at the curved path portion 7a. Of the size. In addition, since the bending angle is about 90 °, which is smaller than that of the conventional example, the resistance of the recording paper 2 at the curved path portion 9b is much smaller than that of the conventional example.

In particular, after the recording paper 2 is nipped by the transport roller 11, the force of pressing the recording paper 2 against the outer guide plates 10 and 43 by the restoring force is reduced by gravity. And especially, the recording paper 2
When the stiffness of the recording paper 2 is not so strong, after the trailing end of the recording paper 2 has left the conveying roller 41, the trailing end of the recording paper 2 hangs down, and rather comes into contact with the inner guide plate 9 and Resistance occurs between the two. In this case, the restoring force of the recording paper 2 is applied in a direction to reduce the drag P ₂ ″ from the guide plate 9. The drag P ₂ ″ at this time is much smaller than the drag P ₂ in the conventional example, and the recording paper 2 hardly generates any resistance.

In this way, the recording paper 2 sent to the left by the conveying roller 11 is nipped by the sub-scanning roller 15, and is intermittently conveyed by a predetermined amount by the intermittent rotation of the sub-scanning roller 15. In synchronization with this, while the carriage is stopped, the recording head 19 is driven according to the image data to be recorded while the carriage 49 moves in a direction substantially orthogonal to the direction of the conveyance. When driven, ink is ejected from the recording head 19 and an image is recorded on the recording paper 2. Thus the leading edge of the recording sheet 2 on which an image has been recorded reaches the second subscanning roller 17, the recording paper 2 is conveyed by the rotation of the two sub-scan rollers 15, 17.

At this time, in the conventional ink jet recording apparatus 100, even when the recording paper 101 is intermittently conveyed by the sub-scanning rollers 106 and 108, the recording paper 101 is bent at the curved path portion 104a, and particularly when the recording paper 101 is strong. Is pressed against the outer guide plate 104 by the restoring force, and the drag P ₂
Is transported in a state in which the transport resistance is generated.
When the recording paper 101 is transported in such a pressed state, the exit of the paper feed tray 116 and the transport rollers 11
Immediately after the recording paper 101 has passed through, or at a portion where a step such as a seam of the guide plate 104 occurs, an impact load may be applied to the recording paper 101. If such an impact load is applied, the conveyance resistance of the recording paper 101, conveying the load varies, which may affect up to transport speed occurs. Sub scanning rollers 106 and 108
Intermittent transport of the recording by the, there is for determining the recording position in the conveying direction, a certain amount of conveyance at a constant speed are performed. If the conveyance speed of the constant speed conveyance changes, the recording position may be disturbed and the recording image quality may be degraded.

On the other hand, in the ink jet recording apparatus 1 of the present embodiment, the recording section 46 controls the sub-scanning rollers 15, 1.
7, when the intermittent conveyance is performed, the conveyance resistance is generated only in the curved path portion 9b having a larger radius of curvature and a smaller bending angle than the conventional example, and as described above, the drag P ₂ ′,
And the resulting transport resistance is kept low. Also, during intermittent conveyance, the rear of the recording paper 2 is held by the conveyance rollers 11, and as described above, the conveyance resistance is reduced by gravity, and especially when the recording paper 2 is not very strong, resistance does not occur. From these facts, according to the present embodiment, the recording paper 2 at the time of recording is
, The accuracy of constant-speed conveyance can be improved, and highly accurate recording can be performed with high reliability.

As described above, the transport resistance generated at the time of recording may affect the recording operation, and the radius of curvature of the curved path portion 9b is adjusted according to the stiffness of the recording paper 2 so that the adverse effect does not occur. It is desirable that the larger the stiffer, the larger it is. By doing so, it is possible to reduce the frequency of occurrence of conveyance failure and to maintain high accuracy of constant-speed conveyance.

The recording on the recording paper 2 is performed in this manner, and after the trailing end is separated from the first sub-scanning roller 15, the recording paper 2 is conveyed only by the rotation of the second sub-scanning roller 17. Done. The recording paper 2 on which recording has been completed is discharged to the discharge tray 22 by further rotation of the second sub-scanning roller 17.

Next, the second platen set on the upper pressure plate 23
The case where the recording paper 24 is selected to perform recording will be described.

First, the pressure plate 23 is moved upward in response to the recording start command, and the recording paper 24 laminated on the pressure plate 23 is pressed by the separation roller 25. When the separation roller 25 rotates clockwise, the uppermost sheet of the recording paper 24 is sent out to the second conveyance path formed by the guide plate 26. The leading end of the recording paper 24 sent out in this manner is conveyed by the rotation of the conveying roller 11. Subsequent operations are the same as those in the case of recording on the recording paper 2 from the paper feed cassette 3 described above.

In the second transport path, the recording paper 24 sent obliquely to the lower left by the separation roller 25 from the pressure plate 23 provided to extend diagonally upward to the right near the upper right end of the ink jet recording apparatus 1 is recorded. Guided to the straight path portion 13a extending substantially horizontally toward the portion 46,
At this time, it is slightly bent. As described above, the second transport path is a substantially straight transport path with little bending. However, since the pressure plate 23 is provided obliquely upward and right along the apparatus case, the It does not protrude very much outside. Therefore, the installation area of the inkjet recording apparatus 1 does not become too large.

Here, when comparing the first transport route and the second transport route, the radius of curvature of the curved route portions 7a and 9b is set to be relatively large in the first transport route in the vertical direction. Can be taken relatively large without difficulty. Further, since the transport path is relatively long, even when a relatively large recording medium is used as the recording paper 2, the recording paper
Is far from the paper feeding unit, the portion where the recording paper 2 comes into contact with the stepped portion is relatively small, and load fluctuation during recording hardly occurs.

Therefore, when two types of recording media having different stiffness are used as the recording papers 2 and 24, the paper feeding cassette 3 for setting the recording paper 2 to be introduced into the first transport path is relatively used. waist and a strong recording medium, it is desirable to relatively lower back pressure plate 23 to set the recording paper 24 to be introduced into the second transport path and for weak recording medium. That is, for example, when two types of recording media having different elastic coefficients are used, the pressure plate 23 is used for a recording medium having a relatively small elastic modulus such as plain paper, and the paper feed cassette 3 is formed of a resin-based film. For a recording medium having a relatively large elasticity coefficient. When two types of recording media having different sizes are used, the sheet cassette 3 is used for a relatively large recording medium, and the pressure plate 23 is used for a relatively small recording medium.

In this manner, two types of recording media having different stiffnesses can be conveyed as well as a recording medium having a strong stiffness as well as a recording medium having a weak stiffness, and good recording can be performed thereon. It can be carried out.

[0085] Next will be outlined the operation of the ink supply system.

As described above, the recording on the recording papers 2 and 24 is performed, and when it is detected that one of the inks in the sub-tank 33 has been consumed and the ink amount has become less than the specified amount, the pump unit 32 operates. Then, a required type of ink is pumped from the ink tank 29 loaded in the ink jet recording apparatus 1 and supplied to the sub tank 33. Thereafter, the sub-tank 3 is similarly operated by the operation of the pump unit 32.
3, ink is supplied to the on-carriage tank 20,
Ink is fed to the recording head 19 therefrom.

As described above, according to the present embodiment, the horizontal U-shaped first extending from the lower part to the upper part along the outer periphery of the ink jet recording apparatus 1 and changing the transport direction by about 180 ° as a whole. Regarding one transport path, the ink supply means 47 is provided in a space surrounded by the transport path.
Is arranged, the transport path becomes relatively long in the vertical direction, so that the radius of curvature of the curved path portion can be made relatively large, and the transport resistance can be reduced. Further, the straight path portions 7b and 9a extending substantially vertically along the side surface of the apparatus can be easily obtained, whereby the recording paper 2 can be changed in course by about 90 ° by the two curved path portions 7a and 9b. This makes it possible to change the course by about 180 ° as a whole, and the conveyance resistance in each curved path portion is greatly increased compared to the conventional case where the recording paper is changed by about 180 ° in a substantially continuous curved path section. Can be made smaller.

As described above, since the transport resistance can be reduced, the load on the drive source of the transport rollers 5, 6, 41, and 11 can be reduced. In addition, the value of the load fluctuation can be reduced accordingly, and high-precision constant-speed conveyance can be performed at the time of recording, and the recording image quality can be improved.

The ink jet recording apparatus 1 of the present embodiment
Thus, even when a recording medium having a large elastic coefficient or a recording medium having a relatively high rigidity, such as a thick recording medium, is used as the recording paper 2, it is possible to carry and record satisfactorily. It can be suitably used as a recording apparatus using a plurality of types of recording media including a recording medium. In this case, the paper feed cassette 3 in which the recording paper 2 to be introduced into the first transport path is set is used for a recording medium having relatively strong rigidity, and the recording paper 24 to be introduced into the second transport path is set. the pressure plate 23
Can be used relatively lower back as a weak recording medium.

The transport route in the present embodiment is arranged such that the straight route portions 7b and 9a of the transport route are located at the right end when viewed from the front side of the apparatus F. Operations on the transport path, for example, taking out jammed paper in the transport path, can be easily performed from the front side F of the apparatus without going around the back side G of the recording apparatus 1. There is no need to go around the back surface G of the recording device 1,
Can easily access any part of the transport path from the side of, even if the ink jet recording apparatus 1 is enlarged due to the enlargement of the recording paper 2, the operability of the jam processing is good.

Further, since the ink supply means 47 is disposed in a space surrounded by the first transport path, that is, disposed above the installation portion of the paper feed cassette 3, the height of the recording apparatus is reduced. Although relatively high, the installation area of the recording apparatus can be relatively small.

Further, the ink supply means 47 is configured so as to be isolated from the electrical parts in the apparatus, so that the possibility of ink entering the electrical parts at the time of ink leakage is reduced, and safety is enhanced. be able to.

The recording head 19 according to the present embodiment is
May include a plurality of heads each of which ejects a plurality of inks of different colors or densities. A plurality of on-carriage tanks 20 that hold ink supplied from the ink supply unit 47 via a tube (not shown) near the recording head 19 may be provided.

Further, the ink supply means 47 may be integrally connected to form an ink supply system unit, and may be integrally detachable from the recording apparatus 1. By doing this,
The assembling work at the time of manufacturing can be facilitated, and the workability at the time of maintenance can be improved. That is, at the time of manufacture, the ink supply system unit and the other parts of the ink jet recording apparatus 1 are separately assembled, and then the ink supply system unit can be easily and finally attached to the ink jet recording apparatus 1. Further, at the time of maintenance, by removing the ink supply system unit, access to the ink supply unit and other parts of the inkjet recording apparatus 1 becomes easy, and workability can be improved. (Second Embodiment) FIG. 5 is a schematic sectional view of a recording apparatus 61 according to a second embodiment of the present invention as viewed from the front. The same parts as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted.

[0095] The second embodiment of the invention with reference to FIG. 5, a description will be given only parts different from the first embodiment. In the present embodiment, six types of detachable main tanks 62 are mounted on the main body, and six main tanks 6 are provided.
2 are all stored in a common tank storage section 63.
A pump section 65 is disposed on the right side of the tank storage section 63, and a sub tank 66 is disposed on the upper side. Recovery system unit 67 is placed on top of the pump unit 65.

The tank storage section 63, the pump section 65,
The sub-tank 66 and the recovery system unit 67 are different from the first embodiment only in the arrangement. The ink tank storage section 28, the pump section 32, the sub-tank 33, and the sub-tank 33 of the first embodiment are respectively provided.
It is functionally the same as the recovery unit 34. The ink receiver 64 also has the same function as the ink receiver 37 in the first embodiment.

Further, similarly to the first embodiment, the recording section 46 has a structure separated from other parts inside the recording apparatus 61 by the partition wall 45 and the platen plate 21.

With such a configuration, the transport roller 11 and the guide plate 13 in the first embodiment can be omitted, and the transport path can be shortened. That is, the tank storage section 63
And the arrangement on the left side of the recording device 61, the space on the right side of the recording device 61 is larger than in the first embodiment. Therefore, the recovery unit 67
Are arranged on the right side of the first embodiment, and accordingly, the recording unit 46 is arranged on the right side of the first embodiment. This makes it possible to omit the transport path above the recording device 46. Further, the structure is simplified by integrating the main tank 62 into one.

The present invention is not limited to the embodiment described above, and various modifications can be considered within the scope of the present invention. For example, the first transport path may be a path that guides the recording paper 2 from the upper part to the lower part via the side end by exchanging the arrangement of the sheet cassette 3 and the sheet discharge tray 22. This makes it easier to load the recording paper 2 into the paper feed cassette 3 and also makes it easier to load a large amount of the recording paper 2 into the paper feed cassette 3.

The recording paper 2 in the lower paper cassette 3
May be a separation roller instead of a suction cup. Further, the second recording paper transport path for manual feed may be omitted.

[0101]

According to the present invention, the ink jet recording apparatus extends from the upper part to the lower part along the outer periphery, and as a whole about 1
With respect to the first transport path which changes the transport direction by 80 °, the ink supply means is arranged in a space surrounded by the transport path, so that the transport path becomes relatively long in the vertical direction. can take target large, it is possible to reduce the conveyance resistance. In addition, a straight path extending substantially vertically along the side surface of the apparatus can be easily taken, whereby the recording paper is turned by about 90 ° in the two curved paths so as to be about 180 ° as a whole. ° The path can be changed, and the transport resistance at each curved path can be reduced by about 180 in a conventional, substantially continuous curved path.
° It can be made much smaller than when changing course.

As described above, since the transport resistance can be reduced, the load on the drive source of the transport roller can be reduced. In addition, the value of the load fluctuation can be reduced accordingly, and high-precision constant-speed conveyance can be performed at the time of recording, and the recording image quality can be improved.

[0103] In the ink jet recording apparatus of the present invention, even with relatively lower back strong recording medium such as elastic modulus is large recording medium and thick recording medium as the recording paper, be carried out satisfactorily conveyed and recording It can be suitably used as a recording apparatus using a plurality of types of recording media including such a recording medium.

When a plurality of types of recording media are used, a second transport path that joins in the middle of the first transport path is provided.
The first paper supply tray on which the recording paper to be introduced into the conveyance path is set for a relatively rigid recording medium, and the second paper supply tray on which the recording paper to be introduced into the second conveyance path is set Can be used for a recording medium having relatively low stiffness. By doing so, the relatively lower back is strong recording medium, favorably transported through the first transport path can be suppressed relatively small transport resistance can be performed satisfactorily recorded.

Further, by arranging the transport path at the side end when viewed from the front of the recording apparatus, access to the transport path when a failure such as a jam occurs can be easily performed from the front of the apparatus. In this configuration, access to a case where the size of the recording sheet is large recorder is large to be the conveying path is easy.

[0106] Further, by arranging the ink supply means in a space surrounded by the travel path of the recording medium, can be relatively small installation area of the recording apparatus. Also, the ink supply means is integrated into an ink supply system unit,
With detachable from the apparatus main body, it is possible to improve assemblability of the time of manufacture, workability in maintenance. Further, by making the ink supply means isolated from the electrical parts in the apparatus, it is possible to reduce the possibility of the ink entering the electrical parts when the ink leaks, and to enhance the safety.

As described above, according to the present invention, there is provided an ink jet recording apparatus which can stably convey a plurality of recording media including a relatively stiff one and has good workability in maintenance. Can be provided.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating a schematic configuration of an inkjet recording apparatus according to a first embodiment of the present invention, as viewed from the front.

FIG. 2 is a plan sectional view of the ink jet recording apparatus of FIG. 1 as viewed from above.

FIG. 3 is a perspective view showing a state of intake and exhaust of a recording unit of the ink jet recording apparatus of FIG. 1;

FIG. 4 is an explanatory diagram of a recording paper conveyance state in a curved path portion of the conveyance path of the inkjet recording apparatus of FIG. 1;

FIG. 5 is a cross-sectional view illustrating a schematic configuration of an inkjet recording apparatus according to a second embodiment of the present invention, as viewed from the front.

FIG. 6 is a cross-sectional view illustrating a schematic configuration of a conventional inkjet recording apparatus.

FIG. 7 is an explanatory diagram of a conveyance state of a recording sheet in a curved path portion of the conveyance path of the ink jet recording apparatus of FIG. 6, and shows a model of a movement of a point of the recording sheet being conveyed.

8 is an explanatory diagram of a conveyance state of a recording sheet in a curved path portion of the conveyance path of the ink jet recording apparatus of FIG. 6, showing a model for explaining a force generated by bending the recording sheet.

[Explanation of symbols]

 1, 61 ink jet recording apparatus 2,24 recording paper 3 sheet feed tray 4 suckers 5,6,11,41 conveying roller 7,8,9,10,13,26,43 guide plates 7a, 9b curved path portion 7b, 9a , 13a Linear path section 15, 17 Sub-scanning roller 19 Recording head 20 On-carriage tank 21 Platen plate 22 Paper discharge tray 23 Pressure plate 25 Separation roller 28 Ink tank storage section 29 Ink tank 32 Pump section 33 Sub-tank 34 Recovery system unit 35 Jam cover 36 fulcrum 37 ink receiver 38 power supply case 39 electrical case 40 recording paper transport path range 42 carriage guide 44 separation unit 45 partition 46 recording unit 47 ink supply means 48 electric circuit 49 carriage 51 intake fan motor 52 intake filter 53 intake duct 53 Opening 53b Connection 53c Pipe 55 Exhaust fan motor 56 Exhaust filter 57 Exhaust duct 57a Opening 57b Connection 57c Pipe 62 Main tank 63 Tank storage 64 Ink receiver 65 Pump 66 Subtank 67 Recovery unit 100 Inkjet recording device Reference Signs List 101 recording paper 102 pressure plate 103 separation roller 104 guide plate 104a curved path portion 104b linear path portion 106, 108 sub-scanning roller 110 inkjet recording head 111 on-carriage tank 112 platen plate 113 transport roller 115 discharge tray 116 paper feed tray 117 ink tank

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2C056 EA20 FB02 FC06 HA28 HA29 HA32 KB37 KC02 2C059 AA05 AA16 AA22 AA26 AB01 3F102 AA01 AB01 BA11 BB17 3F343 FA02 FA09 FB01 FC04 FC05 GA01 GA02 GB01 GC01 GD01 HA37 KB04 HC04

Claims (7)

[Claims] A transport unit that transports a recording medium to a recording unit where recording is performed by an inkjet recording head; an ink tank that retains ink to be supplied to the inkjet recording head; and an ink tank that retains the ink tank And an ink supply means comprising an ink transport means for flowing the ink, wherein the ink jet recording apparatus uses a plurality of types of the recording media having different restoring forces for returning straight when curved. The transporting means has a first U-shaped transporting path that passes through the lower part, the upper part, and the vicinity of one side of the apparatus when viewed from the front of the apparatus. An ink jet recording apparatus disposed in a space surrounded by a first transport path. 2. The ink jet recording apparatus according to claim 1, wherein the plurality of types of recording media have different restoring forces due to different elastic coefficients. 3. The ink jet recording apparatus according to claim 2, wherein the recording medium having a relatively large elastic modulus among the plural types of recording media includes a film of a resin base material. 4. The ink jet recording apparatus according to claim 1, wherein the restoring forces of the plurality of types of recording media are different due to different sizes. 5. A second conveyance path which joins in the middle of the first conveyance path, a first paper feed tray for holding a recording medium introduced into the first conveyance path, and A second paper feed tray for holding a recording medium to be introduced into the transport path of the first paper tray, wherein two types of recording media are used as the plurality of types of recording media, 5. The recording medium according to claim 1, wherein the second paper tray is for a recording medium having the relatively large restoring force, and the second paper feed tray is for a recording medium having the relatively small restoring force. 6. Ink jet recording device. 6. The ink jet recording apparatus according to claim 1, wherein said ink supply means is integrally connectable and detachable with respect to the apparatus main body. 7. The ink jet recording apparatus according to claim 1, wherein the ink supply unit and an electric component in the apparatus are separated.