JP5565107B2 - Recording device - Google Patents

Description

  The present invention relates to a recording head that forms dots on the recording surface of a recording material, a transport device that transports the recording material in a predetermined transport direction along a predetermined transport path, and recording in an area where dots can be formed by the recording head. The present invention relates to a recording apparatus including a support member that contacts a back surface of the surface and supports a recording material.

  In a recording apparatus such as a so-called ink jet printer or dot impact printer, when a recording material to be recorded is deformed, a part of the recording material is originally transported during recording due to the deformation. May cause a so-called paper jam in which the recording of the recording material is normally terminated and cannot be discharged. In addition, a part of the deformed recording material may come into contact with a recording head that should not come into contact during recording, and so-called head rubbing may occur. Such deformation of the recording material that causes paper jam or head rubbing may occur, for example, when the recording material wets with ink ejected from the recording head during recording. Further, the recording material before recording may be deformed due to ambient temperature and humidity fluctuations.

  As a conventional technique aimed at reducing paper jam and head rubbing due to such deformation of the recording material, for example, a plurality of suction holes are provided in a support member, and the suction holes are sucked by a suction device such as a fan. A recording apparatus having a structure in which pressure is generated and a recording material is adsorbed to a supporting member with the negative pressure is known. According to the related art, since the deformation of the recording material is corrected by the force of attracting the recording material to the support member, paper jam and head rubbing due to the deformation of the recording material can be reduced (for example, (See Patent Document 1 or 2).

  As another conventional technique, for example, a recording apparatus using a carriage as a pressing member for a recording material is known. According to the related art, since the recording material is pressed against the support member (platen or the like) by the carriage to correct the deformation of the recording material, it is possible to reduce a paper jam caused by the deformation of the recording material. (For example, refer to Patent Document 2).

  As another conventional technique, for example, a guide member is provided that guides the leading end in the conveyance direction of the recording material that has passed through an area where dots can be formed by the recording head to a recording material discharge mechanism (for example, a discharge roller). Such recording devices are known. According to the related art, even if the leading end of the recording material in the transport direction is transported in a position deviating from the original transport path, the leading end of the recording material is guided to the original transport path by the guide member. It is possible to enter the discharge mechanism. Thereby, paper jam caused by deformation of the recording material can be reduced (for example, see Patent Document 3).

JP 2006-231557 A JP 2007-160551 A JP 2007-224304 A

  However, in a recording apparatus having a structure in which a recording material is adsorbed to a support member, there is a possibility that the recording apparatus may be increased in size and cost greatly by providing a suction device such as a fan. Furthermore, in particular, the conventional technique often does not provide a sufficient effect with respect to the warp of the recording material having a concave recording surface.

  Further, in the above-described prior art using the carriage as a pressing member for the recording material, the range in which the deformation of the recording material can be corrected is limited to the range where the carriage is in contact with the recording material. Therefore, in the related art, there is a possibility that paper jam occurs due to deformation of a portion other than the portion where the pressing force is applied to the recording material by the carriage.

  In addition, the guide member that guides the recording material conveyance direction front end to the recording material discharge mechanism is effective for a paper jam caused by deformation occurring on the front end side of the recording material conveyance direction. It is not possible to reduce head rubbing due to deformation occurring on the rear end side in the conveyance direction of the recording material.

  The present invention has been made in view of such circumstances, and an object of the present invention is to reduce paper jams caused by deformation of a recording material without causing an increase in the size of a recording apparatus and a significant increase in cost. It is also possible to reduce head rubbing due to deformation of the recording material.

<First Aspect of the Present Invention>
According to a first aspect of the present invention, a recording head that forms dots on a recording surface of a recording material, a transport device that transports the recording material in a predetermined transport direction along a predetermined transport path, and a dot formed by the recording head are used. A support member that supports the recording material in contact with the back surface of the recording surface in a formable region, and the transport device causes a transport force to act on the recording material upstream of the support member in the transport direction. A first transport mechanism; a second transport mechanism that applies a transport force to the recording material downstream of the support member in the transport direction; and a downstream side of the transport direction from a region where dots can be formed by the recording head; A guide member provided in contact with the recording surface of the recording material on the upstream side in the transport direction from the region where the transport force acts by the second transport mechanism so as to be able to guide the recording material to the transport path; The support surface of the support member is The generally forms a horizontal surface toward the from the first transport mechanism second conveying mechanism, the guide member, the guide slope interval gradually narrows between the transport path toward the downstream side from the upstream side in the transport direction , and has a first guide portion and the second guide portion from the downstream end along the conveying path is formed by the regulating surface which extends in the conveying direction of the conveying direction of the inclined guide surfaces, the first The guide part is arranged in parallel in the direction intersecting the transport direction so that the guide part is located at the center position in the direction intersecting the transport direction and the second guide part is located at the end position in the direction intersecting the transport direction. The first guide section has a gap between the upstream end of the guide slope in the transport direction and the transport path that is wider than the second guide section, and the second guide section is in the transport direction of the restriction surface. Upstream end of the first guide part Is upstream in the transport direction, it is a recording apparatus wherein.

  The guide slope of the guide member is a slope whose distance from the transport path becomes narrower from the upstream side to the downstream side in the transport direction. As a result, the guide slope is moved away from the conveyance path in a direction away from the support member with respect to the recording material before the leading end in the conveyance direction reaches the region where the conveyance force is applied by the second conveyance mechanism. The tip in the material conveyance direction can be guided to the region where the conveyance force acts by the second conveyance mechanism. Further, the wider the gap between the upstream end in the transport direction and the transport path, the more the guide slope becomes the paper jam without the leading end of the recording material in the transport direction entering the region where the transport force acts by the second transport mechanism. It is possible to reduce the risk of occurrence of

  On the other hand, the regulating surface of the guide member extends from the downstream end in the transport direction of the guide slope in the transport direction along the transport path. As a result, the regulating surface is moved away from the conveyance path in a direction away from the support member with respect to the recording material after the rear end in the conveyance direction passes through the region where the conveyance force is applied by the first conveyance mechanism. It is possible to restrict the recording material from being separated from the support member in contact with the recording surface of the recording material. Further, the more the upstream end in the transport direction is the upstream end in the transport direction, the closer the contact surface is to the recording material at a position where dots can be formed by the recording head. It is possible to regulate the separation from the distance. That is, the higher the upstream end of the regulating surface in the transport direction, the lower the risk of head rubbing caused by the recording material being separated (lifted) from the support member. it can.

  Here, for example, when the distance between the upstream end of the guide slope in the transport direction and the transport path is increased while the angle of the guide slope with respect to the transport path and the distance between the regulation surface and the transport path are maintained constant, Therefore, the upstream end of the regulation surface in the transport direction inevitably shifts to the downstream side in the transport direction. In other words, if the upstream end of the regulation surface in the transport direction is shifted to the upstream side of the transport direction, the distance between the upstream end of the guide slope in the transport direction and the transport path is inevitably narrow. It will become. In addition, for example, when the upstream end position in the transport direction of the regulation surface and the distance between the regulation surface and the transport path are maintained constant, the distance between the upstream end in the transport direction of the guide slope and the transport path is increased. This time, the angle of the guide slope with respect to the transport path inevitably approaches a right angle. For this reason, the leading end of the recording material in the transport direction is easily caught on the guide slope, and there is an increased possibility that a paper jam will occur.

  That is, the guide slope and the regulation surface of the guide member are disposed downstream of the region where dots can be formed by the recording head in the transport direction and upstream of the region where the transport force acts by the second transport mechanism. It can be said that there is a contradictory relationship in improving the effects exhibited by each.

  Therefore, in the guide member according to the present invention, the first guide part and the second guide part formed by the guide slope and the regulation surface are arranged side by side in a direction intersecting the transport direction. The distance between the upstream end of the guide slope in the transport direction and the transport path is wider than that of the second guide portion. In other words, the first guide unit moves the recording material in the region where the conveying force is applied by the second conveying mechanism, compared to the recording material before the tip in the conveying direction reaches the region where the conveying force is applied by the second conveying mechanism. It has a shape that prioritizes reducing the possibility of paper jams without entering the leading end in the transport direction. On the other hand, the second guide part has an upstream end of the regulation surface in the transport direction on the upstream side of the first guide part in the transport direction. In other words, the second guide portion is a head caused by the recording material being separated from the support member with respect to the recording material after the rear end in the conveyance direction has passed through the region where the conveyance force is applied by the first conveyance mechanism. The shape gives priority to reducing the possibility of rubbing.

  That is, the guide member according to the present invention includes a first guide portion having a shape mainly intended to reduce the possibility of paper jam in the vicinity of the leading end side in the conveyance direction of the recording material, and a rear direction in the conveyance direction of the recording material. A second guide portion having a shape mainly intended to reduce the possibility of head rubbing in the vicinity of the end side is provided side by side in a direction crossing the recording material conveyance direction. As a result, the recording apparatus according to the present invention can reduce paper jam caused by deformation of the recording material, and can reduce head rubbing caused by deformation of the recording material.

  As a result, according to the first aspect of the present invention, the paper jam caused by the deformation of the recording material can be reduced and the recording material can be deformed without causing an increase in the size of the recording apparatus and a significant increase in cost. The effect of reducing the rubbed head can also be obtained.

<Second Aspect of the Present Invention>
According to a second aspect of the present invention, in the recording apparatus according to the first aspect described above, the first guide portion is an end portion in a direction intersecting the conveyance direction of the recording material conveyed along the conveyance path. The recording apparatus is provided in a portion corresponding to the above.

  As a form of deformation that occurs in the recording material before or during recording, the recording material is often warped so that the recording surface is concave. In a state where the recording material in which such deformation has occurred is supported by the support member, the recording material is most separated from the support member in the vicinity of the end portion. That is, paper jam and head rubbing due to deformation of the recording material often occur near the end of the deformed recording material. Therefore, by providing the first guide portion of the guide member at the portion corresponding to the end portion in the direction intersecting the conveyance direction of the recording material conveyed along the conveyance path, a paper jam caused by the deformation of the recording material occurs. The fear can be reduced more effectively.

<Third Aspect of the Present Invention>
According to a third aspect of the present invention, in the recording apparatus according to the first aspect or the second aspect described above, the recording head is mounted so as to be capable of reciprocating in a reciprocating direction that intersects the transport direction. A carriage, and a control device that controls movement of the carriage and conveyance of the recording material by the conveyance device, and the carriage has the support member at a portion facing the recording material supported by the support member. A third guide portion is provided that contacts the recording material that is about to be separated from the conveyance path in a direction away from the conveyance path, and is capable of guiding the recording material to the conveyance path. The leading end of the recording material in the transport direction is transported by the guide member in a state where the carriage is at a position where the range where the second guide portion is provided and the third guide portion correspond in the transport direction. Having means for entering the guidable region to, it is a recording apparatus wherein.

  As described above, the second guide portion of the guide member separates the recording material from the support member with respect to the recording material after the rear end in the transport direction passes through the region where the transport force is applied by the first transport mechanism. In this shape, priority is given to reducing the possibility of head rubbing due to the occurrence of head rubbing. For this reason, the second guide unit moves the recording material in the region where the conveying force is applied by the second conveying mechanism to the recording material before the leading end in the conveying direction reaches the region where the conveying force is applied by the second conveying mechanism. It is inferior to the first guide part in that the front end in the transport direction is guided. That is, when the first guide portion and the second guide portion of the guide member are compared, the second guide portion is relatively more likely than the first guide portion to cause paper jam in the vicinity of the leading end of the recording material. There is a weak point.

  Therefore, when the leading end of the recording material in the conveyance direction enters the area where the guide member can guide the conveyance path, the range in which the second guide portion of the guide member is provided and the third guide portion of the carriage are A corresponding positional relationship is assumed in the transport direction. In this state, the leading end in the transport direction of the recording material that is about to move away from the transport path in the direction away from the support member enters the second guide portion of the guide member while being guided to the transport path by the third guide portion of the carriage. Will do. In other words, the weakness of the second guide part, which is inferior to the first guide part, is reduced by the third guide part of the carriage in that the possibility of paper jam occurring near the front end of the recording material is reduced. Accordingly, it is possible to further reduce the possibility of paper jam occurring in the second guide portion of the guide member when the leading end of the recording material in the transport direction is guided to the transport path by the guide member. It is possible to further reduce the possibility of paper jam caused by the occurrence of paper jam.

<Fourth aspect of the present invention>
According to a fourth aspect of the present invention, in the recording apparatus according to any one of the first to third aspects described above, the guide member includes the guide between the first guide portion and the second guide portion. The recording apparatus is characterized in that the shape of the slope and the regulating surface is continuously changed.
According to such a feature, it is possible to reduce the possibility that a paper jam occurs due to the leading end of the recording material being caught in the boundary portion between the first guide portion and the second guide portion.

The principal part side view of an inkjet printer. The principal part top view of an inkjet printer. 1 is a schematic block diagram of an inkjet printer. The principal part side view of an inkjet printer. The principal part side sectional view which illustrated the vicinity of the discharge driven roller holder (1st Example). The front view of a discharge driven roller holder (1st Example). The bottom view of the discharge driven roller holder (first embodiment). The principal part side sectional view which illustrated the vicinity of the discharge driven roller holder (2nd Example). The front view of a discharge driven roller holder (2nd Example). The bottom view of the discharge driven roller holder (second embodiment). The perspective view seen from the bottom part side of a carriage (3rd Example). Front view of the carriage (third embodiment). Flowchart of carriage control and recording paper conveyance control (third embodiment).

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
The present invention is not limited to the embodiments described below, and various modifications are possible within the scope of the invention described in the claims, and these are also included in the scope of the present invention. Needless to say.

<Schematic configuration of inkjet printer 1>
A schematic configuration of the inkjet printer 1 will be described with reference to FIGS.

FIG. 1 is a side view of an essential part of the ink jet printer 1. FIG. 2 is a plan view of a main part of the ink jet printer 1.
The ink jet printer 1 as a “recording device” has a transport driving roller 11, a transport driven roller 12, a support member 13, a discharge drive roller 14, and a discharge driven as means for executing recording on the recording paper P as a “recording material”. A roller 15, a carriage 16, a recording head 17, and a discharge driven roller holder 23 are provided. Among these, the conveyance drive roller 11, the conveyance driven roller 12, the discharge drive roller 14, the discharge driven roller 15, and the discharge driven roller holder 23 feed the recording paper P supported by the support member 13 in the sub-scanning direction Y along a predetermined conveyance path. A “conveying device” for conveying is configured.

  The transport driving roller 11 is formed by applying a high friction coating on the outer peripheral surface of the metal shaft, and rotates by receiving the rotational driving force of the PF motor 31 (FIG. 3). The transport driven roller 12 is pivotally supported so as to be driven to rotate in a state of being biased in a direction in contact with the transport drive roller 11. The transport driving roller 11 and the transport driven roller 12 are a “first transport mechanism” that applies a transport force to the recording paper P on the upstream side in the sub-scanning direction Y from the support member 13 (hereinafter simply referred to as “upstream side”). Configure.

  The support member 13 is an area in which dots can be formed on the recording surface of the recording paper P by the recording head 17 (the surface on which recording is performed; the same applies hereinafter) (hereinafter referred to as “dot-formable region”). A member that supports the recording paper P in contact with the back surface.

  A plurality of discharge driving rollers 14 are provided on a roller shaft having a length exceeding the width of the recording paper P in the main scanning direction X, and the rotation driving force of the PF motor 31 (FIG. 3) is transmitted to rotate. The main scanning direction X is a direction that intersects the sub-scanning direction Y along the recording surface of the recording paper P supported by the support member 13. A plurality of discharge driven rollers 15 are arranged at positions corresponding to the discharge drive rollers 14, and are urged in a direction in contact with the discharge drive rollers 14. The discharge driving roller 14 and the discharge driven roller 15 are a “second transport mechanism” that applies a transport force to the recording paper P on the downstream side in the sub-scanning direction Y from the support member 13 (hereinafter simply referred to as “downstream side”). Configure. The discharge driven roller holder 23 as a “guide member” is a member that pivotally supports the plurality of discharge driven rollers 15, and has a lateral width (length in the main scanning direction X) that exceeds the width of the recording paper P in the main scanning direction X. Have.

  The carriage 16 is supported so as to be able to reciprocate in the main scanning direction X by a carriage support frame 19 with which a carriage guide shaft 18 inserted into the bearing portion 161 and a supported portion 162 abut. The carriage guide shaft 18 and the carriage support frame 19 are disposed along the main scanning direction X. The carriage 16 is connected to an endless belt (not shown) that rotates in both directions by the rotational driving force of the CR motor 32 (FIG. 3). The endless belt is hung on a driving pulley and a driven pulley (not shown) of the CR motor 32, and is disposed substantially parallel to the carriage guide shaft 18 and the carriage support frame 19. The carriage 16 can be reciprocated in the main scanning direction X by bidirectionally rotating the endless belt with the driving force of the CR motor 32.

  The recording head 17 is mounted on the bottom of the carriage 16 so as to face the recording surface of the recording paper P supported by the support member 13. The head surface of the recording head 17 is provided with a plurality of ejection nozzles (not shown) for ejecting ink onto the recording surface of the recording paper P to form dots. Ink is supplied to the recording head 17 from an ink tank (not shown) provided in the main body of the inkjet printer 1 via an ink tube (not shown).

  In the inkjet printer 1, a PE sensor 35 is disposed on the upstream side of the transport driving roller 11 and the transport driven roller 12. The PE sensor 35 is a so-called reflection type sensor, and is upstream of the transport driving roller 11 and the transport driven roller 12, and the leading end of the recording paper P in the sub-scanning direction Y (hereinafter simply referred to as “the leading end of the recording paper P”). .) Or a sensor capable of detecting the rear end without contact.

  In the inkjet printer 1 having the above-described configuration, the recording paper P is supported by the support member 13 and ink is ejected from the head surface of the recording head 17 that reciprocates in the main scanning direction X to form dots on the recording surface. Recording is executed on the recording surface by repeating the operation and the operation of transporting in the sub-scanning direction Y by a predetermined transport amount. A series of these recording controls are executed by the control device 100 having a known microcomputer control circuit.

FIG. 3 is a schematic block diagram of the ink jet printer 1.
The control device 100 includes a ROM 101, a RAM 102, an ASIC (Application Specific Integrated Circuit) 103, a CPU (Central Processing Unit) 104, a nonvolatile memory 105, a PF motor driver 106, a CR motor driver 107 and a head driver 108.

  The ROM 101 stores a recording control program (firmware) and the like necessary for the control of the ink jet printer 1 by the CPU 104. The RAM 102 is used as a work area for the CPU 104 and a data storage area. The ASIC 103 has a control circuit for performing speed control of the PF motor 31 and CR motor 32 that are DC motors and nozzle drive control of the recording head 17. The ASIC 103 sends the control signal of the PF motor 31 to the PF motor driver 106, the control signal of the CR motor 32 to the CR motor driver 107, and the control signal of the recording head 17 to the head driver 108, respectively. Further, the ASIC 103 has an interface function with the personal computer 200. The CPU 104 executes a control program for the inkjet printer 1. The nonvolatile memory 105 stores various data necessary for processing of the recording control program.

  Furthermore, the ink jet printer 1 includes a known linear encoder 33 for detecting the position and moving speed of the carriage 16 and a known rotary encoder 34 for detecting the rotation amount of the transport driving roller 11 and the like. . Output signals from the linear encoder 33, the rotary encoder 34 and the PE sensor 35 are input to the CPU 104 via the ASIC 103.

<First embodiment>
A first embodiment of the present invention will be described with reference to FIGS.
FIG. 4 is a side view of a main part of the ink jet printer 1. FIG. 5 is a side sectional view of the discharge driven roller holder 23 of the first embodiment. FIG. 6 is a front view of the discharge driven roller holder 23 of the first embodiment. FIG. 7 is a bottom view of the discharge driven roller holder 23 of the first embodiment.
In FIGS. 6 and 7, the discharge driven roller 15 is not shown for easier viewing of the drawings.

  The discharge driven roller holder 23 is in contact with the recording paper P on the downstream side of the dot-formable region and on the upstream side of the portion where the discharge driving roller 14 and the discharge driven roller 15 are in contact (region where the conveyance force acts on the recording paper P). The recording paper P can be guided to the transport path Pr. More specifically, a guide slope 231 and a regulation surface 232 are formed on a portion (a portion indicated by a symbol D) facing the transport path Pr in the sub-scanning direction Y of the discharge driven roller holder 23. The area where the guide slope 231 and the regulation surface 232 are formed is an area where the leading edge of the recording paper P can be guided to the transport path Pr by the discharge driven roller holder 23 (hereinafter referred to as “guide area D”).

  As shown in the figure, the guide slope 231 is a slope having a shape in which the distance from the transport path Pr becomes narrower from the upstream side toward the downstream side. The guide slope 231 is provided to guide the recording sheet P before the leading end in the sub-scanning direction Y reaches the portion where the discharge driving roller 14 and the discharge driven roller 15 come into contact with each other to the transport path Pr. More specifically, the guide slope 231 guides the leading edge of the recording paper P that is about to be separated from the transport path Pr in a direction away from the support member 13 to a portion where the discharge driving roller 14 and the discharge driven roller 15 abut. .

  The restriction surface 232 extends from the downstream end of the guide slope 231 in the sub-scanning direction Y along the transport path Pr. The regulation surface 232 is provided to guide the recording paper P after the rear end of the sub-scanning direction Y passes through the portion where the transport driving roller 11 and the transport driven roller 12 are in contact with each other to the transport path Pr. More specifically, the regulation surface 232 restricts the recording paper P from being separated from the support member 13 in contact with the recording paper P that is about to be separated from the transport path Pr in a direction away from the support member 13.

  The guide slope 231 and the restriction surface 232 are formed so as to have different shapes in the main scanning direction X. As a result, the discharge driven roller holder 23 includes a first guide portion 23A and a second guide portion 23B having different shapes in parallel in the main scanning direction X. The first guide portion 23A and the second guide portion 23B may be arranged in any manner in the main scanning direction X. Further, the number of the first guide parts 23A and the number of the second guide parts 23B are not particularly limited to a specific number, and may be provided one by one or may be provided alternately.

  More specifically, in the discharge driven roller holder 23 of the first embodiment, the width of the guide inclined surface 231 (the length in the sub-scanning direction Y) continuously increases from one end side in the main scanning direction X to the other end side. In addition, the width of the restriction surface 232 (the length in the sub-scanning direction Y) continuously narrows from one end side to the other end side in the main scanning direction X (FIG. 6). And FIG. 7). In other words, the first guide portion 23A and the second guide portion 23B of the discharge driven roller holder 23 are formed by continuously changing the shapes of the guide slope 231 and the regulation surface 232 in the main scanning direction X. . Although this is not an essential element of the present invention, it is possible to reduce the possibility that the leading edge of the recording paper P is caught at the boundary portion between the first guide portion 23A and the second guide portion 23B and a paper jam occurs.

5A is a cross-sectional view taken along the line AA of the discharge driven roller holder 23 according to the first embodiment (FIG. 2), and FIG. 5B is a cross-sectional view taken along the line BB of the discharge driven roller holder 23 according to the first embodiment. FIG. 2) and FIG. 5C show the CC cross section (FIG. 2) of the discharge driven roller holder 23 of the first embodiment.
Hereinafter, the shape of the first guide part 23A and the shape of the second guide part 23B will be described in detail.

The distance between the upstream end of the guide slope 231 and the transport path Pr is the distance H3 (FIG. 5C) of the first guide part 23A rather than the distance H1 of the second guide part 23B (FIG. 5A). Is getting wider. The wider the distance between the upstream end of the guide slope 231 and the transport path Pr, the wider the range in which the leading edge of the recording paper P can be guided to the portion where the discharge driving roller 14 and the discharge driven roller 15 abut. Will spread. That is, the first guide portion 23A has a shape in which priority is given to reducing the possibility that a paper jam will occur without the leading edge of the recording paper P entering the portion where the discharge driving roller 14 and the discharge driven roller 15 abut. Yes.
Further, the inclination angle of the guide slope 231 with respect to the transport path Pr is a constant angle over the entire width in the main scanning direction X in the present embodiment, but is not particularly limited to such an aspect. For example, the inclination angle of the guide slope 231 with respect to the transport path Pr may be nonuniform in the main scanning direction X, and may be different between the first guide portion 23A and the second guide portion 23B. The inclination angle of the guide slope 231 with respect to the transport path Pr is preferably as small as possible. As a result, it is possible to reduce the possibility that the leading edge of the recording paper P will deviate outside the transport path Pr and the possibility that a paper jam will occur due to the leading edge of the recording paper P being caught on the guide slope 231.

  On the other hand, the distance between the downstream end Y1 of the recording head 17 and the upstream end Y2 of the regulating surface 232 is less than the distance L3 of the first guide 23A (FIG. 5C) than the distance L1 of the second guide 23B. The direction (FIG. 5A) is narrow. In other words, the upstream end Y2 of the regulation surface 232 is located on the upstream side of the second guide portion 23B rather than the first guide portion 23A. Then, the upstream end of the regulation surface 232 is in contact with the recording paper P at a position closer to the dot formable region and the separation of the recording paper P from the support member 13 is restricted as the upstream side is closer to the upstream side. be able to. That is, the second guide portion 23 </ b> B is configured such that the recording paper P is separated from the support member 13 with respect to the recording paper P after the rear end of the sub-scanning direction Y passes through the portion where the transport driving roller 11 and the transport driven roller 12 abut. The shape gives priority to reducing the possibility of head rubbing due to separation.

  In the substantially intermediate portion between the first guide portion 23A and the second guide portion 23B, the distance H2 (FIG. 5B) between the upstream end of the guide inclined surface 231 and the transport path Pr is the first guide portion 23A. It is narrower than the interval H3 and wider than the interval H1 of the second guide portion 23B. Further, an interval L2 (FIG. 5B) between the downstream end Y1 of the recording head 17 and the upstream end Y2 of the regulating surface 232 is narrower than the interval L3 of the first guide portion 23A, and the interval L1 of the second guide portion 23B. Wider.

  As described above, the discharge driven roller holder 23 according to the present invention has the first guide portion 23A having a shape mainly intended to reduce the possibility of paper jam occurring in the vicinity of the front end side of the recording paper P, and the recording paper. A second guide portion 23B having a shape mainly intended to reduce the possibility of head rubbing in the vicinity of the rear end side of the P sub-scanning direction Y is juxtaposed in the main scanning direction X. As a result, the ink jet printer 1 according to the present invention can reduce the paper jam caused by the deformation of the recording paper P without causing an increase in size and a significant cost, and the deformation due to the deformation of the recording paper P. Head rubbing can also be reduced.

  Further, the discharge driven roller holder 23 of the first embodiment is provided with a first guide portion 23A at a portion corresponding to the end portion in the main scanning direction X of the recording paper P conveyed on the conveyance path Pr. This is not an essential element of the present invention, but by adopting such an aspect, it is possible to more effectively reduce the possibility of a paper jam caused by deformation of the recording paper P.

<Second embodiment>
A second embodiment of the present invention will be described with reference to FIGS.
FIG. 8 is a sectional side view of a main part of the discharge driven roller holder 23 of the second embodiment. 8A is a cross-sectional view taken along the line AA of the discharge driven roller holder 23 of the second embodiment (FIG. 2), and FIG. 8B is a cross-sectional view taken along the line BB of the discharge driven roller holder 23 of the second embodiment ( FIG. 2) and FIG. 8C show the CC cross section (FIG. 2) of the discharge driven roller holder 23 of the second embodiment. FIG. 9 is a front view of the discharge driven roller holder 23 of the second embodiment. FIG. 10 is a bottom view of the discharge driven roller holder 23 of the second embodiment.
In FIGS. 9 and 10, the discharge driven roller 15 is not shown for easier viewing of the drawings.

  In the discharge driven roller holder 23 of the second embodiment, the width of the guide slope 231 (the length in the sub-scanning direction Y) is the narrowest at a position that is substantially the center in the main scanning direction X, and from there to one end side in the main scanning direction X Further, the width of the guide slope 231 (the length in the sub-scanning direction Y) continuously increases toward the other end side. Further, in the discharge driven roller holder 23 of the second embodiment, the width of the regulating surface 232 (the length in the sub-scanning direction Y) is the widest at a position that is substantially the center in the main scanning direction X, and from there, one end in the main scanning direction X The width of the restricting surface 232 (the length in the sub-scanning direction Y) is continuously narrowed toward the side and the other end side.

  That is, the discharge driven roller holder 23 of the second embodiment is provided with the second guide portion 23B at a position that is substantially the center in the main scanning direction X, and the first guide portion 23A is provided near both ends in the main scanning direction X. It has been. Even in such an embodiment, the present invention can be implemented, the paper jam caused by the deformation of the recording paper P can be reduced without increasing the size and the cost of the ink jet printer 1, and the recording paper. Head rubbing due to deformation of P can also be reduced.

<Third embodiment>
A third embodiment of the present invention will be described with reference to FIGS.
First, the configuration of the carriage 16 of the ink jet printer 1 according to the third embodiment will be described with reference to FIGS.
The configuration of the ink jet printer 1 is the same as that of the first embodiment except for the carriage 16, and the description thereof is omitted.

  FIG. 11 is a perspective view seen from the bottom side of the carriage 16 of the third embodiment. FIG. 12 is a front view of the carriage 16 of the third embodiment.

  In the carriage 16 of the third embodiment, a first paper pressing portion 21 and a second paper pressing portion 22 as “third guide portions” are provided on both outer sides of the recording head 17 in the main scanning direction X. The first paper pressing unit 21 and the second paper pressing unit 22 are in contact with the recording paper P that is going to deviate from the path (conveyance path) where the recording paper P should be originally conveyed in the direction away from the support member 13. The recording paper P is provided so as to be guided to the conveyance path.

  More specifically, the first paper pressing portion 21 is provided at a position adjacent to the left side of the recording head 17 as viewed from the front. The second paper pressing unit 22 is provided at a position adjacent to the right side of the recording head 17 as viewed from the front. In addition, the positional relationship between the lower end surfaces of the first paper pressing portion 21 and the second paper pressing portion 22 (the end surface facing the recording paper P supported by the support member 13) and the head surface 171 of the recording head 17 is related to the present embodiment. Then, the head surface 171 of the recording head 17 slightly protrudes, but may be substantially flush, for example, or the lower end surface of the first paper pressing portion 21 and the second paper pressing portion 22. May protrude slightly.

  Further, the first paper pressing portion 21 is formed with an inclined surface 211 that is inclined downward from the end side in the main scanning direction X of the carriage 16 toward the center side and inclined upward toward the downstream side in the downstream portion. Yes. This is not an essential element of the present invention, but by providing such an inclined surface 211, the side edge (main scanning direction X) of the recording paper P that tends to deviate from the conveyance path in the direction close to the bottom of the carriage 16 is provided. ) Can be reduced from being caught by the first paper pressing portion 21.

  FIG. 13 is a flowchart illustrating a procedure of carriage 16 movement control and recording paper P conveyance control executed by the control device 100.

  In the third embodiment of the present invention, in addition to the first guide portion 23A and the second guide portion 23B of the discharge driven roller holder 23, the first paper pressing portion 21 and the second paper pressing portion 22 of the carriage 16 are also used. Is. Hereinafter, a more specific description will be given with reference to the flowchart of FIG. The procedure illustrated in the flowchart of FIG. 13 is a procedure that is executed every time before performing an operation of conveying the recording paper P in the sub-scanning direction Y (hereinafter referred to as “sub-scanning operation”).

  First, it is determined whether or not the leading edge of the recording paper P enters the guide area D (FIG. 4) in the current sub-scanning operation (step S1). This compares, for example, the total transport amount of recording paper P accumulated from when the leading edge of the recording paper P is detected by the PE sensor 35 with the distance from the PE sensor 35 to the upstream end of the discharge driven roller holder 23. Can be specified. If the leading edge of the recording paper P does not enter the guide area D in the current sub-scanning operation (No in step S1), the current sub-scanning operation is executed as it is (step S3).

  On the other hand, when the leading edge of the recording paper P enters the guide area D in this sub-scanning operation (Yes in step S1), the carriage 16 is moved to a predetermined position (step S2). This predetermined position includes a range in which the second guide portion 23B of the discharge driven roller holder 23 is provided and a first paper pressing portion 21 and a second paper pressing portion 22 provided on the bottom of the carriage 16 (FIGS. 11 and 12). ) Is a corresponding position in the sub-scanning direction Y. This is because, with respect to the discharge driven roller holder 23 of the first embodiment, the first paper pressing portion 21 and the second paper pressing portion 22 provided at the bottom of the carriage 16 are near one end side in the main scanning direction X (FIG. 2). That is, it is located in the vicinity of the A-A cross-section portion. Further, with respect to the discharge driven roller holder 23 of the second embodiment, the vicinity of the position where the first paper pressing portion 21 and the second paper pressing portion 22 provided at the bottom of the carriage 16 are substantially the center in the main scanning direction X. That is, it is in a state of being located in the vicinity of the BB cross section in FIG. In this state, the current sub-scanning operation is executed (step S3).

  By executing the sub-scanning operation in such a state, the leading edge of the recording paper P that is about to be separated from the transport path Pr in the direction away from the support member 13 is positioned at the first paper pressing portion 21 and the second paper of the carriage 16. The guide 22 enters the second guide portion 23B of the discharge driven roller holder 23 while being guided to the transport path Pr by the pressing portion 22. Therefore, the leading edge of the recording sheet P can be more reliably entered into the second guide portion 23B where the distance between the upstream end of the guide slope 231 and the transport path Pr is narrower than the first guide portion 23A. That is, the weakness of the second guide portion 23B, which is inferior to the first guide portion 23A in reducing the possibility of paper jam occurring in the vicinity of the leading edge of the recording paper P, is the first paper press portion 21 and the second paper press portion of the carriage 16. 22 can be complemented. Thereby, when the leading edge of the recording paper P is guided to the conveyance path Pr by the discharge driven roller holder 23, it is possible to further reduce the possibility of paper jam in the second guide portion 23B. It is possible to further reduce the possibility of causing the paper jam.

DESCRIPTION OF SYMBOLS 1 Inkjet printer, 11 Conveyance drive roller, 12 Conveyance driven roller, 13 Support member, 14 Discharge drive roller, 15 Discharge driven roller, 16 Carriage, 17 Recording head, 21 1st paper press part, 22 2nd paper press part, 23 Discharge driven roller holder, 23A 1st guide section, 23B 2nd guide section, 100 control device, 231 Discharge driven roller holder guide slope, 232 Discharge driven roller holder regulating surface, D guide area, P recording paper, Pr recording paper Transport path, X main scanning direction, Y sub-scanning direction, Y1 downstream end of recording head, Y2 upstream end of regulating surface

Claims (3)

A recording head for forming dots on the recording surface of the recording material; a transport device for transporting the recording material in a predetermined transport direction along a predetermined transport path; and a back surface of the recording surface in an area where dots can be formed by the recording head A support member that contacts the recording material and supports the recording material,
The transport device includes a first transport mechanism that applies a transport force to the recording material upstream of the support member in the transport direction;
A second transport mechanism that applies a transport force to the recording material downstream of the support member in the transport direction;
The recording target is in contact with the recording surface of the recording material on the downstream side in the transport direction from the area where dots can be formed by the recording head and on the upstream side in the transport direction from the area where the transport force is applied by the second transport mechanism. A guide member provided so as to be able to guide the material to the transport path,
The support surface of the support member forms a substantially horizontal surface from the first transport mechanism to the second transport mechanism,
The guide member has a guide slope whose distance from the transport path becomes narrower from the upstream side to the downstream side in the transport direction, and along the transport path from the downstream end of the guide slope in the transport direction. A first guide portion and a second guide portion formed by a restriction surface extending in the transport direction, wherein the first guide portion is located at a central position in a direction intersecting the transport direction; Are juxtaposed in the direction intersecting the transport direction so as to be located at the end position in the direction intersecting the transport direction,
The first guide part has a wider interval between the upstream end of the guide slope in the transport direction and the transport path than the second guide part,
The recording apparatus according to claim 1, wherein the second guide portion has an upstream end of the regulation surface in the transport direction upstream of the first guide portion in the transport direction. The recording apparatus according to claim 1, wherein the carriage is supported so as to be capable of reciprocating in a reciprocating direction that intersects the transport direction, and the recording head is mounted thereon.
A control device for controlling movement of the carriage and conveyance of the recording material by the conveyance device;
With
The carriage is in contact with a recording material that is about to be separated from the conveyance path in a direction away from the support member at a portion facing the recording material supported by the support member, and the recording medium is moved to the conveyance path. There is a third guide that can guide you to
The control device is configured to move the recording material in the transport direction in a state where the carriage is in a position where the second guide portion of the guide member and the third guide portion correspond to each other in the transport direction. A recording apparatus comprising: means for causing a leading end to enter a region that can be guided to a conveyance path by the guide member.   The recording apparatus according to claim 1, wherein the guide member has a shape in which the shape of the guide slope and the regulation surface is continuously changed between the first guide portion and the second guide portion. A recording apparatus characterized by being.

Images