JP2019172392A - Transport device and printer - Google Patents

Abstract

To reduce a transport load while suppressing decrease in foreign matter removal accuracy.SOLUTION: A transport device 20 comprising a conveyance belt 5 which transports a medium M in a transportation direction A by supporting a medium M on a support face 5a and rotating the medium, and a blade part 11 which removes a foreign matter adhered to the support face 5a. When a rotation direction of the conveyance belt 5 when transporting the medium M in the transportation direction A is so made as to be a normal rotation direction C1, the blade part 11 has a first blade 11a which contacts the support face 5a, and a second blade 11b which is located on a downstream side in the normal rotation direction C1 with respect to the first blade 11a, and contacts the support face 5b. The second blade 11b has an inclined part which is gradually inclined to a downstream side in the rotation direction C1 as approaching to the other side from one side in a width direction B of the conveyance belt 5, and a contact load thereof to the conveyance belt 5 becomes smaller than a contact load of the first blade 11a to the conveyance belt 5.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a transport apparatus and a printing apparatus.

Conventionally, various conveying devices including a conveying belt for conveying a medium have been disclosed. Among these, there is a conveyance device including a blade that removes foreign matters adhering to the conveyance belt.
For example, Patent Document 1 discloses an image forming apparatus (conveyance apparatus) that includes a conveyance belt that conveys a recording medium and a blade that contacts the conveyance belt and cleans the conveyance belt.

JP 2004-136533 A

  However, in a conventional conveyance device including a conveyance belt and a blade, if the contact load of the blade to the conveyance belt is high, rotation of the conveyance belt is hindered (conveyance load increases), and conveyance accuracy may be reduced. . On the other hand, when the contact load of the blade to the conveyor belt is lowered, the foreign matter removal accuracy may be lowered. Therefore, in the configuration in which the foreign matter on the conveyor belt is removed by the blade, it has been difficult to reduce the conveyance load while suppressing a decrease in the accuracy of removing the foreign matter.

  In view of the above, an object of the present invention is to reduce the conveyance load while suppressing a decrease in the accuracy of removing foreign substances.

  The conveying apparatus according to the first aspect of the present invention for solving the above-described problem is attached to the support surface and a support belt for transporting the medium in the transport direction by supporting and rotating the medium on the support surface. A first blade that contacts the support surface when the rotation direction of the transport belt when transporting the medium in the transport direction is a positive rotation direction. And a second blade disposed downstream of the first blade in the forward rotation direction and in contact with the support surface, the second blade from one side in the width direction of the transport belt It has an inclined portion that inclines toward the downstream side in the forward rotation direction toward the other side, and the contact load on the transport belt is smaller than the contact load on the transport belt of the first blade. Characterized in that it is configured so that.

  According to this aspect, since the second blade can cause the foreign matter to flow along the inclined portion, the foreign matter can be prevented from accumulating at a specific portion of the second blade, and the foreign matter can be easily removed. Therefore, even if the contact load of the second blade with respect to the conveyor belt is relatively lowered, sufficient foreign matter removal accuracy can be maintained. And the conveyance load in the whole braid | blade part can be reduced by reducing the contact load with respect to the conveyance belt of a 2nd blade. Therefore, in the configuration in which the foreign matter on the conveyor belt is removed by the blade portion, it is possible to reduce the conveyance load while suppressing a decrease in the accuracy of removing the foreign matter.

  The conveying device according to a second aspect of the present invention is the conveying device according to the first aspect, wherein the amount of biting of the second blade into the conveying belt is smaller than the amount of biting of the first blade into the conveying belt. The contact load of the second blade with respect to the conveyor belt is configured to be smaller than the contact load of the first blade with respect to the conveyor belt.

  According to this aspect, the amount of biting of the second blade into the transport belt is smaller than the amount of biting of the first blade into the transport belt. That is, by reducing the amount of biting of the second blade with respect to the conveyor belt, it is possible to reduce the conveyance load due to the second blade and reduce the conveyance load on the entire blade portion.

  In the conveying device according to the third aspect of the present invention, in the first or second aspect, a contact angle of the second blade with respect to the conveying belt is smaller than a contact angle of the first blade with respect to the conveying belt. Thus, the contact load of the second blade with respect to the conveyor belt is configured to be smaller than the contact load of the first blade with respect to the conveyor belt.

  According to this aspect, the contact angle of the second blade with respect to the transport belt is smaller than the contact angle of the first blade with respect to the transport belt. That is, by reducing the contact angle of the second blade with respect to the conveyance belt, the conveyance load due to the second blade can be reduced, and the conveyance load on the entire blade portion can be reduced.

  In the transport device according to a fourth aspect of the present invention, in any one of the first to third aspects, the second blade is configured more flexibly than the first blade, so that the second The contact load of the blade with respect to the transport belt is configured to be smaller than the contact load of the first blade with respect to the transport belt.

  According to this aspect, since the second blade is configured to be more flexible than the first blade, the contact load of the second blade with respect to the transport belt is smaller than the contact load of the first blade with respect to the transport belt. That is, by configuring the second blade flexibly, the conveyance load due to the second blade can be reduced, and the conveyance load on the entire blade portion can be reduced.

  In the transport device according to a fifth aspect of the present invention, in any one of the first to fourth aspects, the second blade is arcuate when viewed from a direction intersecting the support surface. .

  According to this aspect, since the second blade is formed in an arc shape when viewed from the direction intersecting the support surface, accumulation of foreign matters on the second blade can be suppressed, and reduction in foreign matter removal accuracy can be suppressed.

  In a transport device according to a sixth aspect of the present invention, in any one of the first to fourth aspects, the second blade is configured by arranging a plurality of blades while changing positions in the width direction. The blade located at the center in the width direction among the plurality of blades constituting the second blade is arranged along the width direction.

  According to this aspect, by arranging the blade located at the center in the width direction along the width direction, the position of the plurality of blades in the width direction is changed while suppressing the transfer load from being biased to one side in the width direction. By arranging them, it is possible to suppress the accumulation of foreign matters and to suppress the reduction of foreign matter removal accuracy.

  In a transport device according to a seventh aspect of the present invention, in any one of the first to sixth aspects, the second blade has a protruding portion that protrudes toward the upstream side in the positive rotation direction. It is characterized by being.

  According to this aspect, since the 2nd blade has the protrusion part which protruded toward the upstream of the normal rotation direction, it can capture | acquire a foreign material using this protrusion part.

  In the conveying device according to an eighth aspect of the present invention, in any one of the first to seventh aspects, the second blade has a recessed portion that is recessed toward the downstream side in the forward rotation direction. It is characterized by being.

  According to this aspect, since the 2nd blade has the hollow part hollowed toward the downstream of the normal rotation direction, a foreign material can be captured using this hollow part.

  The conveying device according to a ninth aspect of the present invention is the conveying device according to any one of the first to eighth aspects, wherein the first blade is downstream in the forward rotation direction from one side to the other side in the width direction. It has the inclination part which inclines to the side, It is characterized by the above-mentioned.

  According to this aspect, similarly to the second blade, the first blade also has an inclined portion that inclines toward the downstream side in the forward rotation direction from one side in the width direction toward the other side. For this reason, it is possible to reduce the transport load while effectively suppressing a decrease in the foreign matter removal accuracy.

  In the transport device according to a tenth aspect of the present invention, in any one of the first to ninth aspects, the blade portion is disposed downstream of the second blade in the forward rotation direction, and the support A third blade in contact with the surface, the third blade has an inclined portion inclined toward the downstream side in the positive rotation direction from one side to the other side in the width direction, and The contact load with respect to the conveyance belt is configured to be smaller than the contact load with respect to the conveyance belt of the second blade.

  According to this aspect, it further has an inclined portion that inclines toward the downstream side in the rotational direction as it goes from one side to the other side in the width direction, and the contact load on the conveyor belt is the conveyor belt of the second blade. The third blade is configured to be smaller than the contact load with respect to. For this reason, it is possible to reduce the transport load while effectively suppressing a decrease in the foreign matter removal accuracy.

  A printing apparatus according to an eleventh aspect of the present invention includes the conveyance apparatus according to any one of the first to tenth aspects, and a printing unit that performs printing on the medium supported by the support surface. It is characterized by that.

  According to this aspect, foreign matter can be effectively removed from the transport belt, and printing can be performed on a medium that is transported in a transport state in which the transport load is reduced.

1 is a schematic side view of a printing apparatus according to Embodiment 1 of the present invention. FIG. 3 is a schematic bottom view of the transport device in the printing apparatus according to the first embodiment of the present invention. FIG. 2 is a schematic side view of a transport device in the printing apparatus according to the first embodiment of the present invention. FIG. 2 is an enlarged schematic bottom view of the main part of the transport device in the printing apparatus according to the first embodiment of the present invention. FIG. 6 is a schematic enlarged bottom view of a main part of a transport device in a printing apparatus according to Embodiment 2 of the present invention. FIG. 6 is a schematic bottom view of a transport device in a printing apparatus according to Embodiment 3 of the present invention. FIG. 10 is a schematic bottom view of a transport device in a printing apparatus according to Embodiment 4 of the present invention. FIG. 10 is a schematic bottom view of a transport device in a printing apparatus according to Embodiment 5 of the present invention.

Hereinafter, a printing apparatus according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.
[Example 1] (See FIGS. 1 to 4)
Initially, the outline | summary of the printing apparatus 1 which concerns on Example 1 of this invention is demonstrated.
FIG. 1 is a schematic diagram of a printing apparatus 1 according to the present embodiment.

  As shown in FIG. 1, the printing apparatus 1 of the present embodiment includes a setting unit 2 that sets a roll-shaped medium M. Further, the printing apparatus 1 includes a transport device 20 (a transport device 20a) that can transport the medium M sent from the setting unit 2 in the transport direction A. The transport device 20a includes a driven roller 3 positioned on the upstream side in the transport direction A, a drive roller 4 positioned on the downstream side in the transport direction A, and an endless belt spanned between the driven roller 3 and the drive roller 4. And a cleaning unit 9 for cleaning the transport belt 5 and a drying unit (heating unit 12 and blower unit 13) for drying the transport belt 5.

  Here, the conveyance belt 5 is an adhesive belt in which an adhesive is applied to the support surface 5a (outer surface). As shown in FIG. 1, the medium M is supported and transported by the transport belt 5 in a state where the medium M is attached to the support surface 5 a coated with an adhesive. That is, the transport belt 5 is a support portion for the medium M. The support area of the medium M on the transport belt 5 is an upper area bridged by the driven roller 3 and the drive roller 4. Further, the driving roller 4 is a roller that is rotated by a driving force of a motor (not shown), and the driven roller 3 is a roller that is rotated by being driven by the rotation of the conveying belt 5 accompanying the rotation of the driving roller 4.

  The printing apparatus 1 includes a carriage 7 and a head 8 attached to the carriage 7. The head 8 functions as a printing unit that can print an image on the medium M transported in the transport direction A. The head 8 is provided at a position facing the support area of the medium M on the transport belt 5 and can eject ink. At this time, it can be said that the support region of the medium M on the transport belt 5 is a facing region facing the head 8. The printing apparatus 1 of this embodiment prints an image by ejecting ink from the head 8 onto the medium M being conveyed while reciprocating the carriage 7 in the width direction B of the conveyance belt 5 intersecting the conveyance direction A. Is possible. By including the carriage 7 having such a configuration, the printing apparatus 1 according to the present embodiment causes the medium M to be transported in the transport direction A by a predetermined transport amount, and the carriage 7 is stopped in a state where the medium M is stopped. A desired image can be formed on the medium M by repeating the ejection of ink while moving in the width direction B.

  Note that the printing apparatus 1 according to the present embodiment is a so-called serial printer that performs printing by alternately repeating a predetermined amount of conveyance of the medium M and scanning (reciprocating movement) of the carriage 7, but along the width direction of the medium M. A so-called line printer that continuously prints while continuously conveying the medium M using a line head in which nozzles are formed in a line shape may be used. Furthermore, the printing apparatus may include a recording unit having a configuration different from a so-called inkjet recording unit that discharges and records ink.

  Further, a medium attaching portion 6 is formed at a position facing the conveying belt 5 on the upstream side in the conveying direction A from the carriage 7. When the medium pasting unit 6 presses the medium M against the transport belt 5 in the width direction B, the medium M is pasted to the transport belt 5 in a state where generation of wrinkles is suppressed.

  When the medium M on which the image is formed is discharged from the printing apparatus 1 according to the present embodiment, the drying apparatus (the component of the ink discharged onto the medium M is volatilized after the printing apparatus 1 according to the present embodiment). Device), a winding device (a device for winding the medium M on which an image is formed), and the like.

  Here, as the medium M, a material to be printed can be preferably used. The material to be printed refers to fabrics, clothes, and other clothing products to be printed. Examples of the fabric include natural fibers such as cotton, silk, and wool, chemical fibers such as nylon, and woven fabrics, knitted fabrics, and nonwoven fabrics made by mixing these. In addition, clothes and other clothing products include post-sewing T-shirts, handkerchiefs, scarves, towels, handbags, fabric bags, curtains, sheets, bed covers, furniture, and other parts before sewing. Also included are fabrics before and after cutting.

  Further, as the medium M, in addition to the above-mentioned printing material, plain paper, high-quality paper, exclusive paper for ink jet recording such as glossy paper, and the like can be used. Examples of the medium M include, for example, a plastic film that is not surface-treated for ink jet printing, that is, a plastic film that is not formed with an ink absorbing layer, and a substrate on which a plastic is coated such as paper, or a plastic A film to which a film is bonded can also be used. The plastic is not particularly limited, and examples thereof include polyvinyl chloride, polyethylene terephthalate, polycarbonate, polystyrene, polyurethane, polyethylene, and polypropylene.

  When a material to be printed is used as the medium M, since the ink easily passes through the material to be printed (a phenomenon in which the ink ejected onto the medium M bleeds up to the surface on the back side), the transport belt 5 may be stained with ink. Therefore, the printing apparatus 1 (conveying apparatus 20a) according to the present embodiment includes a cleaning unit 9 for cleaning ink that has fallen through and adhered to the conveying belt 5. The cleaning unit 9 according to the present embodiment includes three cleaning brushes 10 (cleaning brush 10a, cleaning brush 10b, and cleaning brush 10c: see FIG. 2) in which the cleaning liquid is immersed and comes into contact with the transport belt 5, and the cleaning brush 10 on the transport belt. 5 has three blades (first blade 11a, second blade 11b, and third blade 11c: see FIGS. 2 and 3) for wiping (removing) the cleaning liquid (foreign matter) adhering to the conveyor belt 5 by contacting the belt 5. A blade portion 11. And the washing | cleaning part 9 of a present Example is a structure which can also move to the direction away from the conveyance belt 5. As shown in FIG. Details of the blade unit 11 that is a main part of the printing apparatus 1 according to the present embodiment will be described later.

  Furthermore, the transport apparatus 20a of the present embodiment includes a drying unit that can dry the cleaning liquid that could not be wiped by the blade unit 11. The drying unit includes a heating unit 12 that heats the conveyance belt 5 and a blower unit 13 that sends air to the conveyance belt 5.

  The printing apparatus 1 of the present embodiment can transport the medium M in the transport direction A by rotating the driving roller 4 in the rotation direction C1. Since the rotation direction C1 is a rotation direction when the medium M is conveyed in the conveyance direction A, it can be said that the rotation direction C1 is a normal rotation direction. Further, the printing apparatus 1 can also reversely transport the medium M in the direction opposite to the transport direction A by rotating the driving roller 4 in the rotational direction C2 that is opposite to the rotational direction C1. Since the rotation direction C2 is a rotation direction used when the medium M is reversely conveyed, it can be said that the rotation direction C2 is a reverse rotation direction. Note that the printing apparatus 1 of the present embodiment can not only rotate the driving roller 4 in the rotation direction C1 and the rotation direction C2 in a state where the medium M is supported on the conveyance belt 5, but also the medium M on the conveyance belt 5. The drive roller 4 can be rotated in the rotation direction C1 and the rotation direction C2 even in a state where it is not supported.

Next, the blade part 11 which is the principal part of the printing apparatus 1 of the present embodiment will be described.
Here, FIG. 2 is a schematic bottom view of the transport device 20 in the printing apparatus 1 of the present embodiment. FIG. 3 is a schematic side view of the transport device 20 in the printing apparatus 1 of the present embodiment. FIG. 4 is an enlarged schematic bottom view of the blade portion 11 that is a main part of the transport device 20 in the printing apparatus 1 of the present embodiment.

As illustrated in FIGS. 2 and 3, the blade unit 11 according to the present exemplary embodiment rotates the conveyance belt 5 in the rotation direction C <b> 1 that is the rotation direction (forward rotation direction) when the medium M is conveyed in the conveyance direction A. A first blade 11a, a second blade 11b, and a third blade 11c are provided in this order from the upstream side. The conveyance device 20a of the present embodiment improves the removal accuracy of the cleaning liquid by removing the cleaning liquid adhering to the conveyance belt 5 with a plurality of blades (first blade 11a, second blade 11b, and third blade 11c). Is able to.
As shown in FIG. 2, the first blade 11a, the second blade 11b, and the third blade 11c are all viewed from the bottom (as viewed from the direction intersecting the support surface 5a of the conveyor belt 5). In addition, it is not extended in the direction perpendicular to the rotation direction C1, but is inclined with respect to the rotation direction C1.

  In the blade portion 11 of the present embodiment, the first blade 11a, the second blade 11b, and the third blade 11c are all made of the same material (silicon rubber), but as shown in FIG. In addition, the contact angles of the first blade 11a, the second blade 11b, and the third blade 11c with respect to the transport belt 5 are different. Here, the contact angle of each blade with respect to the conveyor belt 5 refers to the angle (Θa, Θb, and Θc in FIG. 3) between the tip portion of each blade and the support surface 5a of the conveyor belt 5. . More specifically, the contact angle Θb of the second blade 11b with respect to the conveyor belt 5 is smaller than the contact angle Θa of the first blade 11a with respect to the conveyor belt 5, and the third blade 11c with respect to the conveyor belt 5 is described in detail. The contact angle Θc is smaller than the contact angle Θb of the second blade 11b with respect to the conveyance belt 5. Since the contact angle of the blade unit 11 with respect to the conveyor belt 5 is configured as described above, in the blade unit 11 of this embodiment, the contact load with respect to the conveyor belt 5 is the first blade 11a, the second blade 11b, It becomes smaller as it becomes 3 blades 11c. In other words, the contact angle of each blade of the blade unit 11 with respect to the conveyance belt 5 decreases from the upstream side to the downstream side in the rotation direction C1, so that the conveyance belt 5 in each blade of the blade unit 11 is reduced. The contact load with respect to becomes smaller from the upstream side to the downstream side in the rotation direction C1.

Once summarized here, as described above, the transport device 20 (transport device 20a) of the present embodiment transports the medium M in the transport direction A by rotating the medium M supported by the support surface 5a. A belt 5 and a blade portion 11 for removing a cleaning liquid (foreign matter) adhering to the support surface 5a are provided. At this time, the rotation direction (rotation direction C1) of the transport belt 5 when transporting the medium M in the transport direction A is defined as the forward rotation direction. When attention is paid to the first blade 11a and the second blade 11b, the blade portion 11 of the present embodiment has a first blade 11a in contact with the support surface 5a and a forward rotation direction (rotation direction C1) with respect to the first blade 11a. It can be said that it has the 2nd braid | blade 11b which is arrange | positioned in the downstream of this and contacts the support surface 5a. Further, focusing attention on the second blade 11b, the second blade 11b is inclined with respect to the rotation direction C1 in a bottom view. In other words, the second blade 11b has an inclined portion that inclines toward the downstream side in the forward rotation direction from one side to the other side in the width direction B of the transport belt 5. Further, the second blade 11b is configured such that the contact load on the transport belt 5 is smaller than the contact load on the transport belt 5 of the first blade 11a.
Since the second blade 11b can flow foreign matter along the inclined portion, it is possible to suppress the accumulation of foreign matter at a specific location of the second blade 11b, and it is easy to remove the foreign matter. Therefore, even if the contact load of the second blade 11b on the conveyor belt 5 is relatively low, sufficient removal accuracy of foreign matters can be maintained. And the conveyance load in the blade part 11 whole can be reduced by reducing the contact load with respect to the conveyance belt 5 of the 2nd braid | blade 11b. Therefore, according to the configuration as described above, in the configuration in which the blade unit 11 removes foreign matter from the transport belt 5, it is possible to reduce the transport load while suppressing a reduction in the precision of removing the foreign matter.

The “contact load of the blade with respect to the conveyor belt 5” refers to a resistance force that is generated when the blade contacts the conveyor belt 5 when the conveyor belt 5 is rotated. For example, the contact load of the first blade 11a with respect to the conveyor belt 5 is the minimum motor torque required to rotate the conveyor belt 5 in a state where only the first blade 11a of each blade is in contact with the conveyor belt 5. Can be determined by measuring The “motor” is a motor that drives the drive roller 4. The contact load on the conveyor belt 5 can be grasped in the same manner for other blades.
The “transport load” is a load that prevents the transport of the medium M by the transport belt 5 (that is, the rotation of the transport belt 5). In the present embodiment, the total contact load of each blade of the blade unit 11 with respect to the transport belt 5 is the transport load.

  Further, from the viewpoint of the printing apparatus 1, the printing apparatus 1 according to the present embodiment includes the transport device 20 a and the head 8 as a printing unit that performs printing on the medium M supported by the support surface 5 a. ing. For this reason, the printing apparatus 1 of this embodiment can perform printing on the medium M that is transported in a transport state in which the cleaning liquid is effectively removed from the transport belt 5 and the transport load is reduced.

  Further, in the transport device 20a of the present embodiment, the first blade 11a is also inclined with respect to the rotation direction C1 in the bottom view, like the second blade 11b. In other words, the first blade 11a has an inclined portion that inclines toward the downstream side in the forward rotation direction (rotation direction C1) from one side in the width direction B toward the other side. For this reason, the conveyance apparatus 20a of a present Example has the structure which can reduce a conveyance load, suppressing the fall of the removal precision of a cleaning liquid effectively.

  Further, as described above, the blade portion 11 of the present embodiment includes the third blade 11c that is disposed downstream of the second blade 11b in the forward rotation direction (rotation direction C1) and contacts the support surface 5a. ing. Similarly to the second blade 11b, the third blade 11c is also inclined with respect to the rotational direction C1 in a bottom view. In other words, the third blade 11c has an inclined portion that inclines toward the downstream side in the normal rotation direction (rotation direction C1) from one side in the width direction B toward the other side. Further, the third blade 11c is configured such that the contact load on the transport belt 5 is smaller than the contact load on the transport belt 5 of the second blade 11b. For this reason, the conveyance apparatus 20a of a present Example has the structure which can reduce a conveyance load, suppressing the fall of the removal precision of a cleaning liquid effectively.

  In addition, as described above, the conveyance device 20a of the present embodiment is configured such that the contact angle Θb of the second blade 11b with respect to the conveyance belt 5 is smaller than the contact angle Θa of the first blade 11a with respect to the conveyance belt 5. The contact load of the blade 11b with respect to the conveyor belt 5 is configured to be smaller than the contact load of the first blade 11a with respect to the conveyor belt 5 (see FIG. 3). At this time, if the contact angle with respect to the conveyor belt 5 decreases, the load on the conveyor belt 5 decreases. If the contact angle with respect to the conveyor belt 5 increases, the load on the conveyor belt 5 increases. Therefore, the conveyance device 20a of the present embodiment reduces the conveyance load due to the second blade 11b by reducing the contact angle Θb of the second blade 11b with respect to the conveyance belt 5, thereby reducing the conveyance load on the entire blade unit 11. ing.

Specifically, in the first blade 11a on the most upstream side in the forward rotation direction (rotation direction C1), the contact angle Θa is increased to surely remove the cleaning liquid, and further to the downstream side in the forward rotation direction than the first blade 11a. In the second blade 11b arranged as an auxiliary for cleaning liquid removal, the contact angle Θb is reduced to suppress an increase in the conveyance load, and the cleaning blade removal finish is arranged downstream of the second blade 11b in the forward rotation direction. In the third blade 11c, the contact angle Θc is further reduced to suppress an increase in the transport load.
However, the method for reducing the transport load by the blade on the downstream side in the normal rotation direction (rotation direction C1) is not limited to such a configuration.

For example, the amount of biting of the second blade 11b into the conveyor belt 5 is made smaller than the amount of biting of the first blade 11a into the conveyor belt 5, thereby reducing the contact load of the second blade 11b with respect to the conveyor belt 5 to the first blade 11a. The contact load on the conveyor belt 5 may be smaller. That is, by reducing the amount of biting of the second blade 11b into the transport belt 5, the transport load by the second blade 11b may be reduced, and the transport load on the entire blade unit 11 may be reduced.
Here, “the amount of biting into the conveyor belt 5” can be determined from, for example, a pressing force that presses the conveyor belt 5, and if the pressing force is large, it can be determined that the amount of biting is large.
In addition, when it has the 3rd blade 11c, it is preferable to make the amount of biting with respect to the conveyance belt 5 of the 3rd blade 11c smaller than the amount of biting with respect to the conveyance belt 5 of the 2nd blade 11b.

As another example, the second blade 11b is configured to be more flexible than the first blade 11a, so that the contact load of the second blade 11b with respect to the conveyor belt 5 is greater than the contact load of the first blade 11a with respect to the conveyor belt 5. May be made smaller. That is, by configuring the second blade 11b flexibly, the conveyance load due to the second blade 11b may be reduced, and the conveyance load on the entire blade unit 11 may be reduced.
Here, “the second blade 11b is configured more flexibly than the first blade 11a” means, for example, the amount of deformation of the second blade 11b when the same load is applied to the first blade 11a and the second blade 11b. This is the case when it is larger. Examples of a configuration in which the second blade 11b is configured more flexibly than the first blade 11a include a configuration in which the second blade 11b is configured with a softer material (for example, a material having a low Mohs hardness) than the first blade 11a, For example, the two blades 11b may be thinner than the first blade 11a.
In addition, when it has the 3rd braid | blade 11c, it is preferable to comprise the 3rd braid | blade 11c more flexibly than the 2nd braid | blade 11b.

Further, each blade of the blade portion 11 of the present embodiment has a protruding portion 14 protruding toward the upstream side in the normal rotation direction (rotation direction C1) as shown in FIG. For this reason, the conveyance apparatus 20a of a present Example becomes a structure which can capture | acquire a washing | cleaning liquid using this protrusion part 14 (capturing a washing | cleaning liquid effectively between adjacent protrusion parts 14). .
Note that in the transport device 20a of the present embodiment, the first blade 11a, the second blade 11b, and the third blade 11c all have protruding portions 14 that protrude toward the upstream side in the normal rotation direction (rotation direction C1). Have.
However, each blade of the blade portion 11 may not have the protruding portion 14. However, it is preferable that at least the second blade 11 b has the protruding portion 14, and it is particularly preferable that both the second blade 11 b and the third blade 11 c have the protruding portion 14. This is because the protrusion 14 is provided on the blade having a relatively small contact load, so that even if the contact load is small, the cleaning liquid removal accuracy in the blade may be reduced.
Further, the shape of each blade of the blade portion 11 may be different from the shape of the present embodiment. Hereinafter, an example in which each blade shape of the blade portion 11 is different from each blade shape of the blade portion 11 of the present embodiment will be described.

[Example 2] (FIG. 5)
Next, the printing apparatus 1 (conveyance apparatus 20) of Example 2 will be described.
FIG. 5 is a schematic enlarged bottom view of the blade portion 11 which is a main part of the transport device 20 (transport device 20b) in the printing apparatus 1 of the present embodiment, and corresponds to FIG. 4 of the printing apparatus 1 of the first embodiment. is there. In addition, the structural member which is common in the said Example 1 is shown with the same code | symbol, and abbreviate | omits detailed description.
Here, the printing apparatus 1 of the present embodiment has the same configuration as the printing apparatus 1 of the first embodiment except for the blade shapes of the blade unit 11. Specifically, each blade of the blade portion 11 of the first embodiment has a configuration having the protruding portion 14, whereas each blade of the blade portion 11 of the present embodiment has a configuration having the recessed portion 15. .

As shown in FIG. 5, in the printing apparatus 1 (conveyance apparatus 20 b) of the present embodiment, each blade of the blade part 11 is a recessed part that is recessed toward the downstream side in the normal rotation direction (rotation direction C <b> 1). 15. For this reason, the conveying apparatus 20b of a present Example has the structure which can capture | acquire a washing | cleaning liquid using this hollow part 15. FIG.
In the transfer device 20b of the present embodiment, all of the first blade, the second blade, and the third blade have a recess 15 that protrudes toward the upstream side in the normal rotation direction (rotation direction C1). Yes.
However, each blade of the blade part 11 may not have the recess 15. However, it is preferable that at least the second blade 11 b has the recess 15, and it is particularly preferable that both the second blade 11 b and the third blade 11 c have the recess 15. This is because by providing the recess 15 in the blade having a relatively small contact load, even if the contact load is small, the cleaning liquid removal accuracy in the blade is reduced, this can be compensated.

[Example 3] (FIG. 6)
Next, the printing apparatus 1 (conveyance apparatus 20) of Example 3 will be described.
FIG. 6 is a schematic bottom view of the conveying device 20 (conveying device 20c) in the printing apparatus 1 of the present embodiment, and corresponds to FIG. 2 of the printing apparatus 1 of the first embodiment. In addition, the structural member which is common in the said Example 1 and 2 is shown with the same code | symbol, and abbreviate | omits detailed description.
Here, the printing apparatus 1 of the present embodiment has the same configuration as the printing apparatus 1 of the first embodiment except for the blade shapes of the blade unit 11. Specifically, each blade (the first blade 11a, the second blade 11b, and the third blade 11c) of the blade unit 11 of the first embodiment is configured by one blade, whereas in the present embodiment, Each blade (the first blade 11d, the second blade 11e, and the third blade 11f) of the blade unit 11 is composed of a plurality (two) of blades.

  As shown in FIG. 6, in the printing apparatus 1 (conveyance apparatus 20 c) of the present embodiment, all of the first blade 11 d, the second blade 11 e, and the third blade 11 f are near the center in the width direction B. It consists of two blades which incline toward the downstream side in the forward rotation direction (rotation direction C1) as going outward. That is, each blade is configured such that an inclined portion is formed by arranging two blades obliquely. By adopting such a configuration, an inclined portion can be suitably formed on each blade. Therefore, the transport device 20c of the present embodiment can effectively move (remove) the cleaning liquid attached to the support surface 5a from the vicinity of the center in the width direction B toward the outside.

  In the transport device 20c of the present embodiment, all of the first blade 11d, the second blade 11e, and the third blade 11f move in the forward rotation direction (rotation direction C1) as they go outward from the center in the width direction B. It is composed of two blades that are inclined toward the downstream side, which is a particularly preferable configuration. However, only some of the blades may be configured by two blades that are located downstream in the forward rotation direction (rotation direction C1) from the center in the width direction B toward the outside. .

Example 4 (FIG. 7)
Next, the printing apparatus 1 (conveyance apparatus 20) of Example 4 will be described.
FIG. 7 is a schematic bottom view of the conveying device 20 (conveying device 20d) in the printing apparatus 1 of the present embodiment, and corresponds to FIG. 2 of the printing apparatus 1 of the first embodiment. In addition, the structural member which is common in the said Examples 1-3 is shown with the same code | symbol, and abbreviate | omits detailed description.
Here, the printing apparatus 1 of the present embodiment has the same configuration as the printing apparatus 1 of the first embodiment except for the blade shapes of the blade unit 11. Specifically, each blade (the first blade 11a, the second blade 11b, and the third blade 11c) of the blade portion 11 of the first embodiment is configured by a straight blade, but this embodiment Each blade (the first blade 11g, the second blade 11h, and the third blade 11i) of the blade portion 11 is configured by a blade having an arc shape.

  As shown in FIG. 7, in the printing apparatus 1 (conveying apparatus 20d) of the present embodiment, the first blade 11g, the second blade 11h, and the third blade 11i, which are the blades of the blade unit 11, are all It is arcuate in bottom view (viewed from the direction intersecting the support surface 5a). In this case, an arc-shaped portion in each blade corresponds to an “inclined portion”. That is, each blade has a configuration in which an inclined portion is formed by using an arc-shaped blade. By setting it as such a structure, an inclined part can be suitably formed in each blade. The conveying device 20d of the present embodiment is configured such that the first blade 11g, the second blade 11h, and the third blade 11i are formed in an arc shape when viewed from the direction intersecting the support surface 5a. The accumulation of the cleaning liquid on each blade of the third blade 11i is suppressed, and the decrease in the foreign matter removal accuracy is suppressed.

  In the transport device 20d of the present embodiment, the first blade 11g, the second blade 11h, and the third blade 11i are all arcuate in a bottom view, and have a particularly preferable configuration. However, only some of the blades may be arcuate blades in bottom view.

[Example 5] (FIG. 8)
Next, the printing apparatus 1 (conveyance apparatus 20) of Example 5 will be described.
FIG. 8 is a schematic bottom view of the conveying device 20 (conveying device 20e) in the printing apparatus 1 of the present embodiment, and corresponds to FIG. 2 of the printing apparatus 1 of the first embodiment. In addition, the structural member which is common in the said Examples 1-4 is shown with the same code | symbol, and abbreviate | omits detailed description.
Here, the printing apparatus 1 of the present embodiment has the same configuration as the printing apparatus 1 of the first embodiment except for the blade shapes of the blade unit 11. Specifically, each blade (the first blade 11a, the second blade 11b, and the third blade 11c) of the blade unit 11 of the first embodiment is configured by one blade, whereas in the present embodiment, Each blade (the first blade 11j, the second blade 11k, and the third blade 11l) of the blade portion 11 is composed of a plurality of (five) blades.

  As shown in FIG. 8, in the printing apparatus 1 (conveying apparatus 20e) of the present embodiment, each of the first blade 11j, the second blade 11k, and the third blade 11l that are blades of the blade unit 11 is used. The plurality of blades are arranged by changing the positions in the width direction B. The blade 11T located at the center in the width direction B among the plurality of blades constituting each of the first blade 11j, the second blade 11k, and the third blade 11l is disposed along the width direction B. . In the transport device 20e of this embodiment, “along the width direction B” indicates a state substantially parallel to the width direction B. However, “along the width direction B” does not have to be completely parallel to the width direction B, but only needs to be substantially parallel to the width direction B. By arranging the blade 11T located at the center in the width direction B along the width direction B, while suppressing the transfer load from being biased to one side in the width direction B, the positions of the plurality of blades are changed in the width direction B. By arranging, the accumulation of the cleaning liquid is suppressed, and the deterioration of the cleaning liquid removal accuracy is suppressed.

  The transport device 20e of the present embodiment is configured by arranging the plurality of blades while changing the positions in the width direction B, and each of the first blade 11j, the second blade 11k, and the third blade 11l, and In each blade, the blade 11T located at the center in the width direction B is arranged along the width direction B, which is a particularly preferable configuration. However, only a part of each blade is arranged by arranging a plurality of blades while changing the positions in the width direction B, and the blade 11T located in the center of the width direction B is along the width direction B. It is good also as a structure arranged.

  In addition, this invention is not limited to the said Example, A various deformation | transformation is possible within the range of the invention described in the claim, and it cannot be overemphasized that they are also contained in the scope of the present invention. For example, the blade portion 11 of the above embodiment has the first blade, the second blade, and the third blade in order from the upstream side in the forward rotation direction (rotation direction C1). The configuration may be composed of only two blades, or may further include a fourth blade, a fifth blade,... On the downstream side in the forward rotation direction (rotation direction C1) with respect to the third blade. For example, the first blade does not necessarily have an inclined portion. The inclined portion is preferably provided at least on a blade having a relatively small contact load, such as the second blade or the third blade. This is because even if the contact load is small, the cleaning liquid removal accuracy in the blade is reduced, this can be compensated. On the other hand, the first blade with a relatively large contact load may be able to ensure the removal accuracy of the purified liquid even without an inclined portion. For example, when the first blade is not provided with the inclined portion and the other blades are provided with the inclined portion, the formation range in the rotational direction C of the blade portion 11 is larger than the configuration in which the inclined portions are provided on all the blades. Can be small. Therefore, the size of the cleaning unit 9 can be made compact.

DESCRIPTION OF SYMBOLS 1 ... Printing apparatus, 2 ... Set part, 3 ... Driven roller, 4 ... Drive roller,
5 ... Conveying belt, 5a ... Support surface, 6 ... Medium pasting part, 7 ... Carriage,
8 ... Head (printing unit), 9 ... Cleaning unit, 10 ... Cleaning brush, 10a ... Cleaning brush,
10b ... Cleaning brush, 10c ... Cleaning brush, 11 ... Blade part,
11a ... 1st blade, 11b ... 2nd blade, 11c ... 3rd blade,
11d ... 1st blade, 11e ... 2nd blade, 11f ... 3rd blade,
11g ... 1st blade, 11h ... 2nd blade, 11i ... 3rd blade,
11j ... 1st blade, 11k ... 2nd blade, 11l ... 3rd blade,
DESCRIPTION OF SYMBOLS 12 ... Heating part, 13 ... Blower part, 14 ... Protrusion part, 15 ... Depression part, 20 ... Conveying device,
20a ... conveying device, 20b ... conveying device, 20c ... conveying device, 20d ... conveying device,
20e ... conveying device, M ... medium

Claims (11)

A conveying belt that conveys the medium in the conveying direction by rotating while supporting the medium on a support surface;
A blade portion for removing foreign matter adhering to the support surface,
When the rotation direction of the transport belt when transporting the medium in the transport direction is a positive rotation direction,
The blade portion includes a first blade that contacts the support surface, and a second blade that is disposed downstream of the first blade in the forward rotation direction and contacts the support surface.
The second blade has an inclined portion that inclines toward the downstream side in the forward rotation direction from one side to the other side in the width direction of the conveyor belt, and the contact load on the conveyor belt is A conveying device configured to be smaller than a contact load of the first blade on the conveying belt. In the conveyance apparatus of Claim 1,
The amount of biting of the second blade with respect to the conveying belt is smaller than the amount of biting of the first blade with respect to the conveying belt, so that the contact load of the second blade with respect to the conveying belt causes the conveyance of the first blade to the conveying belt. A conveying device configured to be smaller than a contact load on the belt. In the conveyance apparatus of Claim 1 or 2,
When the contact angle of the second blade with respect to the transport belt is smaller than the contact angle of the first blade with respect to the transport belt, the contact load of the second blade with respect to the transport belt causes the transport of the first blade to the transport belt. A conveying device configured to be smaller than a contact load on the belt. In the conveyance apparatus of any one of Claim 1 to 3,
The second blade is configured to be more flexible than the first blade so that the contact load of the second blade on the transport belt is smaller than the contact load of the first blade on the transport belt. It is comprised in the conveying apparatus characterized by the above-mentioned. In the conveyance apparatus of any one of Claim 1 to 4,
The conveying device, wherein the second blade has an arc shape when viewed from a direction intersecting the support surface. In the conveyance apparatus of any one of Claim 1 to 4,
The second blade is configured by arranging a plurality of blades while changing the position in the width direction,
The blade located at the center in the width direction among the plurality of blades constituting the second blade is arranged along the width direction. In the conveyance apparatus of any one of Claim 1 to 6,
The conveying device, wherein the second blade has a protruding portion protruding toward the upstream side in the forward rotation direction. In the conveyance apparatus of any one of Claim 1 to 7,
The conveying device, wherein the second blade has a recessed portion that is recessed toward the downstream side in the forward rotation direction. In the conveyance apparatus of any one of Claim 1 to 8,
The conveying device according to claim 1, wherein the first blade has an inclined portion that inclines toward the downstream side in the forward rotation direction from one side to the other side in the width direction. In the conveyance apparatus of any one of Claim 1 to 9,
The blade portion has a third blade that is disposed downstream of the second blade in the forward rotation direction with respect to the second blade and is in contact with the support surface;
The third blade has an inclined portion that inclines toward the downstream side in the forward rotation direction from one side to the other side in the width direction, and the contact load on the transport belt is the second blade. A conveying device configured to be smaller than a contact load on the conveying belt. A transport device according to any one of claims 1 to 10,
And a printing unit that performs printing on the medium supported by the support surface.

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