JP2023135889A - Conveying device and printing device - Google Patents

Abstract

To provide a conveying device and a printing device which can improve accuracy in detecting vibrations of a squeegee.SOLUTION: A conveying device comprises a conveying belt 21, a removing part 44 and a detecting part 60. The conveying belt 21 has an adhesive layer 25 to which a medium can be attached, which can convey the medium attached to the adhesive layer 25 in a conveying direction Y. The removing part 44 has a squeegee 43 that contacts a surface 25A of the adhesive layer 25 to remove an attached object attaching to the surface 25A. The detecting part 60, mounted on the removing part 44, detects vibrations of the squeegee 43 that are caused when the conveying belt 21 moves in the conveying direction Y.SELECTED DRAWING: Figure 6

Description

TECHNICAL FIELD The present invention relates to a conveyance device and a printing device that are equipped with a conveyor belt that conveys a medium.

As an example of this type of printing apparatus, Patent Document 1 discloses an inkjet recording apparatus that prints by ejecting liquid such as ink onto a medium such as a recording medium. This recording apparatus includes a conveyance device having a conveyance belt that conveys a recording medium, and a recording head (an example of a printing unit) that discharges ink onto the recording medium to record.

The conveying device described in Patent Document 1 includes a removing member for removing cleaning liquid adhering to the surface of a conveying belt coated with an adhesive, and a pressure variable mechanism that varies the pressure with which the removing member is brought into contact with the conveying belt. , and a vibration detection sensor for detecting vibration of the removal member.

When the transport belt starts rotating, the removal member vibrates significantly due to a change in the frictional force between the transport belt and the removal member. This vibration of the removing member causes a small amount of cleaning liquid to remain on the conveying belt even if the removing member performs a removing operation to remove the cleaning liquid on the conveying belt.

Therefore, when vibration of the conveyor belt is detected by the vibration detection sensor, the pressure of the pressure variable mechanism is set lower than the first pressure when removing the cleaning liquid attached to the surface of the conveyor belt until the conveyor belt speed reaches a constant speed. Control to a high second pressure. Then, when the speed of the conveyor belt reaches a constant speed, control is performed to return the pressure of the pressure variable mechanism to the first pressure for removing the cleaning liquid adhering to the surface of the conveyor belt. In this way, by increasing the pressure when the removal member removes the cleaning liquid adhering to the conveyance belt based on the detection result of the vibration of the conveyance belt, a trace amount of the cleaning liquid is suppressed from remaining.

JP 2021-134071 Publication

However, depending on the location where the vibration detection sensor is provided, it may not be possible to accurately detect the magnitude of the vibration of the removal member. In the conveyance device described in Patent Document 1, there is no particular limitation on the location where the vibration detection sensor is provided, and there is room to improve the accuracy of detecting the vibration of the removal member.

A conveyance device that solves the above problem includes a conveyor belt that has an adhesive layer to which a medium can be attached, a conveyor belt that can convey the medium attached to the adhesive layer in the conveyance direction, and a conveyor belt that is in contact with the surface of the adhesive layer. The present invention includes a removing section having a squeegee that removes deposits attached to the surface, and a detecting section that is attached to the removing section and detects vibrations of the squeegee that occur when the conveying belt moves in the conveying direction.

A printing device that solves the above problems includes a conveyor belt that has an adhesive layer to which a medium can be attached, and that can convey the medium attached to the adhesive layer in a conveyance direction, and the medium that is conveyed by the conveyor belt. a printing unit that performs printing, a removing unit that has a squeegee that comes into contact with the surface of the adhesive layer to remove deposits attached to the surface, and is attached to the removing unit, and the conveyor belt moves in the conveyance direction. and a detection unit that detects vibrations of the squeegee that occur at the time.

FIG. 1 is a front view showing a printing device including a conveying device according to a first embodiment. FIG. 2 is a schematic side sectional view showing the printing device. FIG. 2 is a schematic side view showing a transport device, a cleaning section, and the like. FIG. 3 is a perspective view showing a cleaning section and a conveyor belt. FIG. 3 is a perspective view showing a part of the cleaning section. 6 is a cross-sectional view of the removed portion taken along the 6-6 break line in FIG. 5. FIG. It is a schematic sectional view showing the attachment structure of the detection part attached to the removal part. FIG. 8 is a schematic cross-sectional view showing a mounting structure of a detection section different from that in FIG. 7; FIG. 9 is a schematic cross-sectional view showing a mounting structure of a detection section different from that in FIG. 8; FIG. 10 is a schematic cross-sectional view showing a mounting structure of a detection section different from that in FIG. 9 . FIG. 2 is a block diagram showing the electrical configuration of a printing device. It is a graph showing the vibration detection result of the squeegee for one rotation of the conveyor belt. It is a graph showing the relationship between the average vibration intensity of a squeegee and time. It is a schematic diagram which shows the deterioration information of the adhesive layer displayed on a display part. It is a flowchart which shows adhesion layer inspection processing. It is a schematic front view which shows the removal part in 2nd Embodiment. It is a schematic front view which shows the removal part when a squeegee is in a state of partial contact. It is a flowchart which shows adhesion layer inspection processing. It is a schematic diagram which shows the adhesive layer deterioration information displayed on a display part. FIG. 20 is a schematic diagram showing adhesive layer deterioration information different from that shown in FIG. 19 displayed on the display unit.

(First embodiment)
Hereinafter, a first embodiment of the printing device 11 will be described with reference to the drawings. In the drawings, the printing device 11 is placed on a horizontal plane, and the direction of gravity is indicated by the Z axis, and the directions along the horizontal plane are indicated by the X and Y axes. The X-axis, Y-axis, and Z-axis are orthogonal to each other. In the following description, the direction along the X axis is also referred to as the width direction X, the direction along the Y axis as the transport direction Y, and the direction along the Z axis as the vertical direction Z. The X-axis is an imaginary axis parallel to the width direction X of the conveyor belt, which will be described later, and the Y-axis is an imaginary axis parallel to the conveyance direction Y of the medium M on the conveyor belt 21. Note that the direction in which the conveyor belt 21 rotates is also referred to as a rotation direction CD.

<About the configuration of the printing device 11>
As shown in FIG. 1, the printing device 11 includes a conveying device 20 and a printing section 30. The transport device 20 includes a transport belt 21 that transports the medium M. The conveyor belt 21 supports and conveys a medium M such as cloth or paper on an outer peripheral surface 24 .

The printing device 11 has a casing 12 having a column-beam structure. The printing device 11 includes an operation section 13. The operation unit 13 is configured by, for example, an operation panel having a display unit 14. The printing device 11 includes a display unit 14 as an example of a notification unit for notifying information. The display unit 14 is realized by, for example, a touch panel type display device. The operation unit 13 is capable of giving instructions to the printing device 11 by a user operating the screen of the display unit 14 . Note that the operation unit 13 may be realized by an operation button or the like. In this case, the printing device 11 may include a display section 14 separately from the operation section 13.

The printing device 11 also includes an ink supply source 15 that supplies ink used when the printing unit 30 prints on the medium M. The ink supply sources 15 each contain one color of ink among the plurality of color inks. Ink colors include, for example, cyan, magenta, yellow, and black. The printing unit 30 prints an image or the like on the medium M by ejecting ink supplied from the ink supply source 15 toward the medium M, for example. Note that the ink supply source 15 may be an ink cartridge or an ink tank.

As shown in FIG. 2, the printing device 11 includes a housing 12, a conveying device 20 supported by the housing 12, a printing section 30 that prints on a medium M conveyed by a conveying belt 21, a printing section 30, etc. A cover 16 that covers the. The printing device 11 also includes a control section 100 that controls the conveyance device 20 and the printing section 30.

The housing 12 has a column-beam structure including a bottom frame 12a, a column frame 12b, and an upper frame 12c. The cover 16 is an exterior member that covers each part of the printing apparatus 11.
The printing section 30 includes a discharge section 31 that discharges liquid such as ink. The printing section 30 performs a printing operation of printing an image or the like on the medium M by discharging liquid such as ink from the discharging section 31 toward the medium M supported by the conveyor belt 21 .

The conveyance device 20 includes a conveyance unit 22 rotatably equipped with a conveyance belt 21 , a first heating section 33 as an example of a heating section that heats the conveyance belt 21 , and a pressurizer that presses the medium M and attaches it to the conveyance belt 21 . 34. The first heating section 33 includes a heater 33A serving as a heat source. The pressing section 34 includes a pressing roller 35 that rotates while pressing the medium M, and a second heating section 36 that heats the pressing roller 35 (see FIG. 11). The conveying device 20 also includes a cleaning section 40 that cleans the conveying belt 21, a removing section 44 that removes deposits including cleaning liquid etc. from the conveying belt 21, and a drying section 37 that dries the conveying belt 21 after cleaning. Be prepared.

As shown in FIG. 2, the conveyance unit 22 is provided at the upper part of the housing 12, and includes a drive roller 23A, a driven roller 23B, and a conveyance belt 21. The transport unit 22 can transport the medium M in the +Y direction as the transport belt 21 moves due to the rotation of the drive roller 23A. The drive roller 23A and the driven roller 23B both have rotation axes along the X direction. The printing device 11 includes a feeding section 18 (see FIG. 6) that feeds the medium M attached to the conveyor belt 21. Note that the printing device 11 is used as a set with a winding device (not shown) that winds up the printed medium M while peeling it off from the conveyor belt 21.

The conveyor belt 21 is an endless elastic belt. It is wound around the outer periphery of the conveyor belt 21, the drive roller 23A, and the driven roller 23B. The conveyance unit 22 rotates the endless conveyance belt 21 along a predetermined circumferential path by rotationally driving the drive roller 23A.

The conveyor belt 21 has an adhesive layer 25 to which the medium M can be attached. Specifically, the conveyor belt 21 includes an endless belt base material 21B and an adhesive layer 25 formed on the outer peripheral surface of the belt base material 21B. The medium M is attached to the surface 25A of the adhesive layer 25. The conveyance belt 21 is capable of conveying the medium M attached to the adhesive layer 25 in the conveyance direction Y. The adhesive layer 25 has adhesive properties that allow it to be temporarily adhered to other members and to be able to be peeled off from the adhesive state. Here, the adhesive layer 25 includes a heat-sensitive type and a pressure-sensitive type. The heat-sensitive adhesive layer 25 has a property that its adhesive strength increases as the temperature increases. The pressure-sensitive adhesive layer 25 has a property that its adhesive strength increases when pressure is applied. The adhesive layer 25 in this example is of a heat-sensitive type. Therefore, the conveyance device 20 includes heating units 33 and 36 that heat the adhesive layer 25.

The outer peripheral surface 24 of the conveyor belt 21 is divided into a plurality of parts depending on its position and shape. That is, the outer peripheral surface 24 is divided into an upper surface portion 24a, a downstream curved surface portion 24b, a lower surface portion 24c, and an upstream curved surface portion 24d. The upper surface portion 24a is a flat surface portion located in the +Z direction from the center of the drive roller 23A and along the XY plane. The upper surface portion 24a is a portion on which the conveyor belt 21 supports the medium M. The curved surface portion 24b is the outer peripheral surface of the portion of the conveyor belt 21 wound around the drive roller 23A. The medium M attached to the adhesive layer 25 is peeled off in the middle of the curved surface portion 24b. Further, the lower surface portion 24c is a flat surface portion located in the −Z direction from the center of the drive roller 23A and along the XY plane. Further, the curved surface portion 24d is the surface of the portion of the conveyor belt 21 wound around the driven roller 23B.

The conveyance device 20 has a conveyance motor 26 that is a drive source for a drive roller 23A. By driving the transport motor 26 by the control unit 100, driving and stopping of the transport belt 21 and the transport speed during driving are controlled.

As shown in FIG. 2, the first heating section 33 heats the adhesive layer 25. Specifically, the first heating unit 33 heats the adhesive layer 25 at a position upstream in the circumferential direction CD from the attachment start position AP where attachment of the medium M to the adhesive layer 25 is started. The first heating unit 33 heats the adhesive layer 25 of the conveyor belt 21 at a predetermined position within a section of the cleaned conveyor belt 21 up to the attachment start position AP where the medium M is attached.

The pressing unit 34 is a mechanism that presses the medium M against the adhesive layer 25 in order to adhere the medium M to the adhesive layer 25. The pressing unit 34 transfers the medium M onto the adhesive layer by moving the pressure roller 35 back and forth in the +Y direction and the -Y direction within a predetermined range in the Y-axis direction while pressing the medium M sent onto the conveyor belt 21. Paste it on the surface 25A of 25. The pressure roller 35 is heated by the second heating unit 36 and presses the medium M onto the adhesive layer 25 while heating the adhesive layer 25 from above the medium M. When the conveyance belt 21 is pressurized by the pressure roller 35, it is supported by a support base 17 located on the opposite side of the pressure roller 35 with the conveyance belt 21 in between.

As shown in FIG. 2, the printing unit 30 is located in the +Z direction of the transport device 20. The printing unit 30 is configured to be able to print on the medium M that is transported in the +Y direction. The printing unit 30 may use a serial printing method or a line printing method. In the case of a serial printing method, the printing section 30 includes a discharge section 31 and a carriage 32 that supports the discharge section 31 so as to be able to reciprocate along the X direction. The ejection unit 31 is arranged in the +Z direction with respect to the medium M, and prints on the medium M by ejecting ink, which is an example of a liquid, onto the printing surface of the medium M. The discharge section 31 is controlled by the control section 100. After printing, the medium M is peeled off from the curved surface portion 24b of the conveyor belt 21 by the force of a winding device (not shown) winding the medium M into a roll.

As shown in FIG. 2, the cleaning unit 40 cleans the conveyor belt 21 at the lower surface portion 24c. The cleaning section 40 is arranged in the −Z direction with respect to the +Y direction end of the lower surface portion 24c. The cleaning unit 40 cleans the adhesive layer 25 by applying a cleaning liquid, which is an example of a liquid, to the surface 25A of the adhesive layer 25. Note that the details of the cleaning section 40 will be described later.

The cleaning section 40 is controlled by the control section 100.
The drying section 37 dries the conveyor belt 21 after cleaning. The drying section 37 is arranged at a position on the downstream side of the cleaning section 40 in the circumferential direction CD. In the example shown in FIG. 2, the drying section 37 is arranged at a position adjacent to the cleaning section 40 in the -Y direction. The drying section 37 blows air toward the outer circumferential surface 24, for example. The drying section 37 dries the outer circumferential surface 24 (surface 25A) by, for example, blowing warm air.

The transport device 20 includes a lifting mechanism 45 that lifts and lowers the cleaning section 40 . The cleaning unit 40 is configured to be movable up and down in the Z-axis direction with respect to the conveyor belt 21 by a lifting mechanism 45. The elevating mechanism 45 includes, for example, one or more (in the example of FIG. 2, a plurality of) cylinders 46 as a driving source. A piston rod of the cylinder 46 is fixed to a frame 47 of the cleaning section 40. The lifting mechanism 45 places the cleaning unit 40 in a retracted position where the brush 42 and squeegee 43 are spaced from the surface 25A in the -Z direction when not in use, and in a cleaning position where the brush 42 and squeegee 43 are in contact with the surface 25A when in use. Deploy.

The direction in which the squeegee 43 moves away from the adhesive layer 25 is referred to as a first direction DS1, and the direction in which the squeegee 43 approaches the adhesive layer 25, which is the opposite direction to the first direction DS1, is referred to as a second direction DS2. The first direction DS1 and the second direction DS2 are directions that intersect with the surface of the lower surface portion 24c. The elevating mechanism 45 is configured to be able to move the squeegee 43 in the first direction DS1 and the second direction DS2 with respect to the surface 25A. When the cleaning section 40 is not in use, the brush 42 and the squeegee 43 are placed in a retracted position where they are spaced downward from the surface 25A, and when in use, the cleaning section 40 is placed in a cleaning position where the brush 42 and the squeegee 43 are in contact with the surface 25A. In the example shown in FIG. 2, the drying section 37 is also configured to be movable up and down together with the cleaning section 40 by an elevating mechanism 45.

The control unit 100 includes a CPU (Central Processing Unit) and memory (not shown). A CPU is an arithmetic processing unit. Memory is a storage device that secures an area or work area for storing programs of the CPU, and includes memory elements such as RAM (Random Access Memory) and EEPROM (Electrically Erasable Programmable Read-Only Memory), storage, and the like. The CPU controls the operation of each part of the printing apparatus 11 according to a program stored in the memory. That is, the control section 100 controls the transport unit 22, the first heating section 33, the pressing section 34, the printing section 30, the cleaning section 40, the drying section 37, and the like.

Next, the detailed configuration of the cleaning section 40 will be explained with reference to FIG. 3. As shown in FIG. 3, the cleaning section 40 includes a storage tank 41 that stores the cleaning liquid Q, a brush 42, and a removal section 44 that has a squeegee 43 (blade). The brush 42 performs a cleaning operation of contacting the surface 25A and brushing the surface 25A using the cleaning liquid Q. The removal unit 44 includes a squeegee 43 that comes into contact with the surface 25A of the adhesive layer 25 to remove deposits attached to the surface 25A. The squeegee 43 is an example of a contact member that contacts the surface 25A of the adhesive layer 25. The squeegee 43 comes into contact with the surface 25A of the adhesive layer 25 and removes the cleaning liquid adhering to the surface 25A.

As the discharge unit 31 prints on the medium M, liquid may adhere to the outer circumferential surface 24 of the conveyor belt 21 . For example, when the medium M is a fabric, liquid such as ink that has bleed through may adhere to the outer circumferential surface 24 . Furthermore, when the medium M is peeled off from the outer circumferential surface 24, thread waste of the fabric may remain on the outer circumferential surface 24. Liquid such as ink adhering to the outer circumferential surface 24 causes staining of the medium M, and lint remaining on the outer circumferential surface 24 causes a decrease in the adhesion of the medium M to the outer circumferential surface 24. In the cleaning section 40 , the outer circumferential surface 24 of the conveyor belt 21 is cleaned by a brush 42 in order to remove the liquid adhering to the outer circumferential surface 24 and dust caused by the medium base material.

The storage tank 41 is arranged in the −Z direction with respect to the drive roller 23A and the conveyor belt 21. The storage tank 41 has a box shape with an open top. A cleaning liquid Q for cleaning the outer peripheral surface 24 is stored in the storage tank 41 . The cleaning liquid Q stored in the storage tank 41 is supplied to a brush 42 that performs a cleaning operation.

The brush 42 has a cylindrical shaft body 42A and a brush portion 42B that extends radially from the outer peripheral surface of the shaft body 42A. The shaft body 42A extends along the width direction X, and has a pair of shaft portions 42C (only one of which is shown in FIG. 4) that protrudes outward at both ends in the width direction X. It is rotatably supported by a part of the side wall 41B of the storage tank 41. The lower part of the brush portion 42B is immersed in the cleaning liquid Q.

The brush portion 42B is configured to be able to come into contact with the lower surface portion 24c of the conveyor belt 21. The brush 42 is rotated by a motor (not shown) and uses the cleaning liquid Q stored in the storage tank 41 to clean liquid such as ink and lint generated from the medium M attached to the surface 25A of the conveyor belt 21. Perform cleaning operations to remove dust. The liquid and lint removed from the conveyor belt 21 by the brush 42 are collected in the cleaning liquid Q in the storage tank 41. In this way, the cleaning liquid Q in the storage tank 41 has the function of supplying the cleaning liquid Q necessary for the cleaning operation to the brush 42, and the function of washing away liquid such as ink and dust such as lint that has adhered to the brush 42 during the cleaning operation. and has.

As shown in FIG. 3, the removing section 44 having the squeegee 43 is attached to a part of the storage tank 41 at a position downstream of the brush 42 in the circumferential direction CD. The squeegee 43 wipes off cleaning liquid Q and the like remaining on the surface 25A after cleaning with the brush 42 from the surface 25A. The squeegee 43 is supported by the bracket 54 in an attitude tilted backward in the -Y direction at a predetermined angle with respect to the Z-axis direction, and can suitably wipe off the cleaning liquid Q and the like remaining on the surface 25A.

As shown in FIG. 3, an inner frame 19 is provided on the inner side (+Z direction side) of the portion of the conveyor belt 21 that the tip of the squeegee 43 comes into contact with. The inner frame 19 is installed in the housing 12 so as to extend in the X-axis direction, and supports the conveyor belt 21 from inside. This allows the conveyor belt 21 to resist the pressing force from the squeegee 43.

As shown in FIG. 3, the storage tank 41 has a rear wall 41A that extends in the +Z direction with its base end fixed to the outer wall surface in the -Y direction. The spray type drying section 37 is supported by the rear wall 41A. That is, the drying section 37 is supported by the cleaning section 40. The drying section 37 blows heated air supplied through the hose 38 onto the surface 25A of the adhesive layer 25, for example. Note that the position where the brush 42 cleans the surface 25A of the conveyor belt 21 is the brushing position BP. The position where the squeegee 43 contacts the surface 25A is the wiping position WP.

As shown in FIG. 4, the brush 42 and the squeegee 43 are provided across the width direction X of the conveyor belt 21. The length of the brush 42 in the X direction is slightly longer than the width of the area of the surface 25A of the conveyor belt 21 to which the medium M having the maximum width in the X direction is attached. Therefore, the entire region of the surface 25A of the conveyor belt 21 to which the medium M is attached is cleaned by the brush 42. The length of the squeegee 43 in the width direction X is slightly longer than the length of the brush 42 in the width direction X. As a result, the squeegee 43 wipes a wider area of the surface 25A of the conveyor belt 21 in the width direction X than the area where the brush 42 performs the cleaning operation. The squeegee 43 can reliably wipe off the cleaning liquid Q and the like remaining after the brush 42 has cleaned, and can prevent the cleaning liquid Q from wiping away. The side plate 48 fixed to the outside of the side wall 41B in the width direction X extends in the −Y direction beyond the rear wall 41A when viewed from the X direction. A drying section 37 shown in FIG. 3 is supported on a portion of the side plate 48 extending in the -Y direction.

As shown in FIG. 5, the removal unit 44 includes a squeegee holder 51 that supports the squeegee 43, holding members 52 and 53 that hold the squeegee 43 in a positioned state relative to the squeegee holder 51, and a bracket that supports the squeegee holder 51. 54. The bracket 54 is fixed to a plate member 49 extending in the +Z direction from a part of the base end side of the rear wall 41A. The center of the bracket 54 is inclined backward in the -Y direction at a predetermined angle. Due to the backwardly inclined angle of the bracket 54, the squeegee 43 can suitably scrape off the cleaning liquid Q and the like remaining on the lower surface portion 24c (see FIG. 2) after cleaning with the brush 42.

Next, details of the configuration for supporting the squeegee 43 will be described with reference to FIG. 6.
In the drawings, the direction along the joint surface between the squeegee holder 51 and the bracket 54 is indicated by the α axis and the β axis, and the axis perpendicular to the α-β plane is indicated by the γ axis. The α, β, and γ axes are orthogonal to each other. Further, the α axis and the X axis are substantially parallel. In the following explanation, the direction along the α axis is the width direction α, the direction along the β axis is also the extension direction of the squeegee 43, so the extension direction β, and the direction along the γ axis is perpendicular to the above-mentioned joint surface. Since this direction is also called the vertical direction γ.

As shown in FIG. 6, the bracket 54 has a first portion 55 and a second portion 56 formed by bending a plate material. The first portion 55 is provided along the plate member 49 (see FIG. 5). The second portion 56 is inclined backward in the −Y direction with respect to the first portion 55. The squeegee holder 51 constituting the removal section 44 is fixed to the second portion 56 of the bracket 54 with screws 57. The squeegee holder 51 is made of a square cylindrical pipe member, and the inside thereof is hollow.

A first holding member 52 and a second holding member 53 that hold the squeegee 43 are fixed to the tip of the squeegee holder 51 by screws 58 and 59, respectively. The squeegee 43 has a base portion 43A extending in the vertical direction γ and a blade portion 43B extending in the extending direction β from the center of the base portion 43A in FIG. 6 viewed from the X-axis direction. The squeegee 43 is placed on the squeegee holder 51 with the bottom surface of the base 43A in contact with the surface of the squeegee holder 51 on the extending direction β side. The distal end of the first holding member 52 comes into contact with the base 43A of the squeegee 43, thereby suppressing the displacement of the squeegee 43 in the extending direction β. The second holding member 53 suppresses displacement of the squeegee 43 in the vertical direction γ (particularly in the -γ direction) by having its tip abut against the side surface of the squeegee 43 closer to the base 43A. That is, the second holding member 53 suppresses displacement of the squeegee 43 due to the force that the squeegee 43 receives from the adhesive layer 25 when the conveyor belt 21 rotates in the circumferential direction CD. In this way, the squeegee 43 is held in an attitude tilted backward at a predetermined angle, with deviations in the extension directions β and -γ directions being suppressed.

The conveyance device 20 of this embodiment includes a detection unit 60 shown in FIG. 6 that detects vibrations of the squeegee 43. The detection unit 60 detects vibrations of the squeegee 43 that occur when the conveyance belt 21 moves in the conveyance direction Y. That is, the detection unit 60 detects the vibration of the squeegee 43 that is generated in the squeegee 43 that comes into contact with the adhesive layer 25 when the conveyance belt 21 rotates in the circumferential direction CD in which the medium M is conveyed in the conveyance direction Y.

As shown in FIG. 6, the detection section 60 is attached to the removal section 44 having a squeegee 43. By providing the detection unit 60 in the removal unit 44 having the squeegee 43, it is possible to detect the vibration of the squeegee 43 at a position where it is not significantly attenuated. In the example shown in FIG. 6, the detection unit 60 is attached to the squeegee holder 51. The squeegee holder 51 is a cylindrical plate material on which the squeegee 43 is directly placed. Therefore, the detection unit 60 attached to the squeegee holder 51 can detect vibrations of the squeegee 43 with high sensitivity.

Next, an example of a mounting structure for the detection section 60 attached to the removal section 44 will be described with reference to FIGS. 7 to 10. Some examples of attachment structures in which the detection section 60 is attached to the removal section 44 are illustrated below.

In the example shown in FIG. 7, the detection unit 60 is provided inside a squeegee holder 51 to which the squeegee 43 is fixed. The squeegee holder 51 provided with the detection section 60 is a member in which vibrations of the squeegee 43 are difficult to damp. Further, the detection section 60 is provided inside the squeegee holder 51, so that the squeegee holder 51 functions as a cover to prevent foreign matter such as dust from adhering to the detection section 60. In particular, in this example, since the squeegee 43 has a function of wiping off the liquid such as the cleaning liquid Q that has adhered to the surface 25A of the adhesive layer 25, the squeegee holder 51 removes the liquid such as the cleaning liquid Q that has passed through the squeegee 43 from the detection unit 60. It has the function of protecting

In the example shown in FIGS. 8 and 9, the removal section 44 has a mounting section 70 to which the detection section 60 is attached. In the example shown in FIGS. 8 and 9 , the mounting portion 70 is configured to have lower rigidity (for example, shear rigidity) than the peripheral portion 80 of the mounting portion 70 . By making the attachment part 70 more susceptible to distortion, the attachment part 70 becomes more likely to vibrate with a large amplitude. This improves the detection accuracy when the detection unit 60 detects vibrations of the squeegee 43.

In the example shown in FIG. 8, the removal part 44 has a mounting part 71 extending from the upper corner part 81 of the squeegee holder 51 in the extending direction β. The thickness of the mounting portion 71 is approximately the same as or thinner than the thickness of the upper corner portion 81, which is the peripheral portion 80 of the mounting portion 71. The mounting portion 71 is configured to have lower rigidity than the upper corner portion 81 that is the peripheral portion 80 of the mounting portion 70 . The length that the attachment portion 71 extends is sufficiently longer than the thickness of the plate. The attachment part 71 has a cantilevered structure, and the detection part 60 is attached to the free end that is the tip. Since the tip portion to which the detection unit 60 is attached can be freely displaced, it is likely to vibrate relatively largely.

Further, in the example shown in FIG. 9, the squeegee holder 51 that constitutes the removal section 44 has an attachment section 70. The attachment part 70 is an attachment part 72 in which a part of the squeegee holder 51 is thinner than a peripheral part 80 of the part. The thickness of the mounting portion 72 is formed to be thinner than the thickness of the upper wall portion 82 that is the peripheral portion 80 thereof. Therefore, the attachment part 72 is more easily distorted than the upper wall part 82 and can vibrate with a large amplitude when the vibration of the squeegee 43 propagates.

In the example shown in FIG. 10, similarly to FIG. 7, the detection unit 60 is provided inside the squeegee holder 51 to which the squeegee 43 is fixed. The squeegee holder 51 provided with the detection section 60 is a member in which vibrations of the squeegee 43 are difficult to damp. Further, the detection section 60 is provided inside the squeegee holder 51, so that the squeegee holder 51 functions as a cover to prevent foreign matter such as dust from adhering to the detection section 60. In particular, in this example, since the squeegee 43 has a function of wiping off the liquid such as the cleaning liquid Q that has adhered to the surface 25A of the adhesive layer 25, the squeegee holder 51 removes the liquid such as the cleaning liquid Q that has passed through the squeegee 43 from the detection unit 60. It has the function of protecting

In the example shown in FIG. 10, a squeegee holder 51 in which a detection part 60 is attached has a mounting part 70 configured to have lower rigidity than a peripheral part 80. The detection section 60 is attached to a mounting section 70 inside the squeegee holder 51. The attachment portion 70 is an attachment portion 72 in which a portion of the squeegee holder 51 is thinner than a peripheral portion 80 of the portion, as in FIG. 9 . The thickness of the mounting portion 72 is formed to be thinner than the thickness of the upper wall portion 82 that is the peripheral portion 80 thereof. The detection section 60 is attached to the attachment section 72 at a position inside the squeegee holder 51.

Note that the detection section 60 may be attached to the bracket 54 (see FIG. 6) that constitutes a part of the removal section 44. Alternatively, the bracket 54 may be provided with an attachment portion 70 having lower rigidity than the surrounding portion, and the detection portion 60 may be attached to the attachment portion 70.

<Electrical configuration of printing device 11>
Next, the electrical configuration of the printing device 11 will be described with reference to FIG. 11.
As shown in FIG. 11, the components of the printing section 30, the feeding section 18, and the conveyance device 20 are electrically connected to the control section 100. The components of the transport device 20 are, as shown in FIG. 11, a transport unit 22, a pressing section 34, a cleaning section 40, a first heating section 33, and a second heating section 36. The objects to be controlled that are electrically connected to the control unit 100 are as follows.

The objects to be controlled are a feeding motor (not shown) that is a driving source for the ejection section 31 and the feeding section 18 that constitute the printing section 30 . When the printing unit 30 uses a serial printing method, a carriage motor (not shown), which is a drive source for the carriage 32, is also controlled.

The objects to be controlled include the transport motor 26 that is the drive source of the transport unit 22, the drive source (for example, a motor) of the pressing section 34, the motor that is the drive source of the brush 42 that constitutes the cleaning section 40, and the first heating section. 33 and a heater that constitutes the second heating section 36.

Furthermore, the control section 100 is electrically connected to an operation section 13 and a display section 14 . The display section 14 in this example is a touch panel, and its operation function may also serve as the operation section 13. The control unit 100 receives an operation signal from the operation unit 13 operated by the user. Furthermore, the display unit 14 has a notification function to notify information by display. The control unit 100 causes the display unit 14 to display the notification content. The control unit 100 also causes the display unit 14 to display information such as a menu screen and printing progress status.

An encoder 27 that detects the rotation of the transport motor 26 or the drive roller 23A is electrically connected to the control unit 100. The encoder 27 outputs a detection signal containing a number of pulses proportional to the amount of rotation of the transport motor 26 or the drive roller 23A.

Further, a detection unit 60 provided in the removal unit 44 is electrically connected to the control unit 100. The detection unit 60 is, for example, an acceleration sensor or a gyro sensor (angular velocity sensor). Here, the acceleration sensor may be of any frequency change type, piezoelectric type, piezoresistive type, or capacitance type. Further, the gyro sensor may be, for example, a vibration gyro sensor. The vibration gyro sensor may use either a piezoelectric vibrator or a crystal vibrator.

The control unit 100 includes a computer 110. Computer 110 includes a position measurement section 111 and a storage section 112. The position measurement unit 111 measures the belt rotation position, which is the position during one rotation of the conveyor belt 21. When a predetermined position during one rotation of the conveyor belt 21 is set as a reference position, the belt rotation position indicating which position on the conveyor belt 21 passing through the reference position is during one rotation is measured. . In this example, the reference position is the position when the detection unit 60 starts a vibration detection operation for detecting the vibration of the squeegee 43. Therefore, the position measurement unit 111 measures the belt rotational position, which is the position on the conveyor belt 21 while the conveyor belt 21 rotates once, with the reference position, which is the position when the detection unit 60 starts the vibration detection operation, as the origin. do.

Specifically, the position measurement unit 111 is configured with a counter that counts, for example, the number of pulse edges of the detection signal input from the encoder 27. The control unit 100 resets the count value of the position measurement unit 111 when the detection unit 60 starts a vibration detection operation in which the vibration of the squeegee 43 is detected. Then, the control unit 100 causes the position measuring unit 111 to start counting a count value indicating the belt rotational position on the conveyor belt 21 at the wiping position WP where it contacts the squeegee 43. The control unit 100 acquires the vibration detection result of the squeegee 43 detected by the detection unit 60 during a period in which the conveyor belt 21 rotates once. That is, the control unit 100 acquires the vibration detection results of the squeegee 43 for one revolution of the conveyor belt 21 so that the deterioration state of the adhesive layer 25 for one revolution of the conveyor belt 21 can be inspected.

As shown in FIG. 11, the storage unit 112 stores a program PR. The program PR includes at least the program shown in the flowchart of FIG. The computer 110 in the control unit 100 executes the adhesive layer inspection process shown in FIG. 15 by executing the program PR. The storage unit 112 stores threshold data SD used by the control unit 100 to determine whether the adhesive layer 25 has deteriorated in the adhesive layer inspection process. In the threshold data SD, a plurality of threshold values SD1, SD2, ..., SDN are set for each heating temperature at which the first heating unit 33 heats the adhesive layer 25, and is associated with each heating temperature. The control unit 100 calculates the vibration intensity based on the vibration detection result obtained by the detection unit 60 detecting the vibration of the squeegee 43. Then, the control unit 100 determines whether the adhesive layer 25 has deteriorated by comparing the vibration intensity with a threshold value SD corresponding to the heating temperature at that time. In this way, the control unit 100 makes a determination regarding the deterioration of the adhesive layer 25 based on the detection result of the detection unit 60. Note that the vibration intensity is not limited to the amplitude, but is a physical quantity that can be used to determine the deterioration of the adhesive layer 25 and can be calculated from the detection result of the detection unit 60. Appropriate physical quantities may be employed depending on the type of detection unit 60.

<About vibration measurement>
Vibration measurement will be explained using an example in which an acceleration sensor is used as the detection unit 60. The acceleration sensor detects the acceleration of vibration and outputs a detection signal with a voltage value corresponding to the detected acceleration value. The control unit 100 measures the vibration acceleration during one rotation of the conveyor belt 21 based on the detection signal input from the detection unit 60 .

FIG. 12 is a graph schematically showing the vibration acceleration of the conveyor belt 21 measured while the conveyor belt 21 rotates once. The horizontal axis is the belt rotation position y, and the vertical axis is the vibration intensity. In this example in which an acceleration sensor is used as the detection unit 60, the vibration intensity is vibration acceleration. As can be seen from the graph of FIG. 12, many large vibration intensities occur during one rotation of the conveyor belt 21. The larger the frictional force between the squeegee 43 and the adhesive layer 25, the larger the peak of vibration acceleration tends to be. When the adhesive layer 25 is new, its adhesive strength is high, so the frictional force with the squeegee 43 is large. The adhesive force of the adhesive layer 25 gradually decreases as time passes after the adhesive layer 25 is replaced (for example, after the adhesive is applied). When the adhesive force of the adhesive layer 25 is large, the squeegee 43 is pulled in the circumferential direction CD by the adhesive force of the adhesive layer 25, and the amount of displacement Δy in which the squeegee 43 is displaced in the circumferential direction CD until it is peeled off from the adhesive layer 25 is There will be more. When the pulled squeegee 43 is peeled off from the adhesive layer 25, vibrations of the squeegee 43 are generated. The greater the displacement Δy until the squeegee 43 is peeled off from the adhesive layer 25, the greater the restoring force Fb of the squeegee 43 becomes. In other words, the greater the displacement Δy until the squeegee 43 is peeled off from the adhesive layer 25, the greater the absolute value |Av| of the vibration acceleration Av. Note that "||" is a symbol indicating an absolute value.

When the control unit 100 acquires the measurement data VI of the vibration acceleration for one revolution as the vibration intensity for one revolution of the conveyor belt 21, the control unit 100 calculates the average vibration acceleration |Ava| which is the average of the vibration acceleration for one revolution. . The control unit 100 determines whether the adhesive layer 25 has deteriorated by comparing the average vibration acceleration |Ava| and the threshold value data SD. Note that both positive and negative accelerations are always generated during vibration, so when calculating the average value of vibration acceleration, the absolute value of vibration acceleration is used so that positive vibration acceleration and negative vibration acceleration do not cancel each other out.

As an example of a method for determining deterioration of the adhesive layer 25, a method using the average vibration acceleration |Ava| has been shown, but the present invention is not limited to this, and any appropriate determination method can be adopted. For example, it may be determined whether or not the adhesive layer 25 has deteriorated using power spectral density (hereinafter also referred to as PSD). Alternatively, it may be determined whether or not the adhesive layer 25 has deteriorated using acceleration spectral density (hereinafter also referred to as ASD). Furthermore, power spectrum (PS), energy spectral density (ESD), or the like may be used. Further, when the detection unit 60 is a gyro sensor, similarly, a determination method that can evaluate the angular velocity ω, the average angular velocity, and other vibrations can be appropriately employed.

When the control unit 100 determines that the adhesive layer 25 has deteriorated, it notifies the user of this by displaying information indicating that the adhesive layer 25 has deteriorated on the display unit 14, which is an example of a notification unit.

FIG. 13 is a graph showing how the adhesive layer 25 deteriorates over time. The horizontal axis represents the elapsed time t since the time of replacing the adhesive layer 25, and the vertical axis represents the average vibration intensity. In examples where the vibration intensity is vibration acceleration, the average vibration intensity is the average vibration acceleration. Here, the initial average vibration intensity A0 when the adhesive layer 25 is replaced is sufficiently higher than the threshold value SD based on the threshold value data SD. A curve DC is drawn in which the average vibration intensity Aav gradually decreases as time t elapses after printing is performed by the printing device 11. Then, the control unit 100 determines that the adhesive layer 25 has deteriorated when the average vibration intensity Aav becomes less than the threshold value SD. In addition, the threshold data SD includes a plurality of threshold values SD1, SD2, ..., SDN according to the heating temperature, and one threshold value SDk according to the heating temperature at that time (however, k is N or less). natural numbers) are selected and used.

<Action of the embodiment>
Next, the functions of the conveying device 20 and the printing device 11 of this embodiment will be explained.
The user operates the operation unit 13 to cause the adhesive layer 25 of the conveyor belt 21 to be inspected. Alternatively, the control unit 100 may inspect the adhesive layer 25 at a predetermined time after the printing device 11 is powered on. This inspection may be performed before or after setting the medium M on the conveyor belt 21. The inspection may be performed before the conveyor belt 21 is heated by the heating units 33 and 36, during heating, or after the conveyor belt 21 is heated to the target temperature.

For example, after the printing device 11 is powered on and before printing starts, the conveyance belt 21 may be rotated to inspect the deterioration of the adhesive layer 25. Further, if there is no next printing after printing is completed, the conveyor belt 21 may be rotated once and an inspection regarding deterioration of the adhesive layer 25 may be performed. Furthermore, an inspection regarding deterioration of the adhesive layer 25 may be performed during printing. In this case, the inspection may be performed constantly during printing, or periodically or irregularly.

In the following, an example will be described in which inspection is performed at least during printing. Note that in the case of a heat-sensitive adhesive layer 25, it is important whether the necessary adhesive force can be obtained under heating conditions. Further, the adhesive force of the thermosensitive adhesive layer 25 changes depending on the heating temperature. Therefore, if the inspection is to be carried out at a time other than during printing, the inspection may be carried out at a constant heating temperature regardless of the type of medium M. On the other hand, during printing, the heating temperature varies depending on the type of medium M, so the adhesive layer 25 is heated at a heating temperature that corresponds to the type of medium M during printing.

In consideration of the difference in the adhesive force of the adhesive layer 25 due to the difference in heating temperature depending on the type of medium M, in this embodiment, threshold data SD is prepared for each heating temperature. That is, the control unit 100 determines the heating temperature at which the adhesive layer 25 is heated by the heating units 33 and 36 based on information about the type of medium M to be printed at that time. Further, this heating temperature may be changed by operating the operation unit 13 by the user. When performing an inspection, the control unit 100 reads out the threshold value SD from the storage unit 112 and uses it in accordance with the heating temperature actually employed.

When the control unit 100 receives a printing instruction or when the user operates the operation unit 13 and receives an inspection instruction, the control unit 100 executes the adhesive layer inspection process shown in FIG. 15 . The adhesive layer inspection process will be described below with reference to FIGS. 12 to 15. When performing the adhesive layer inspection process, for example, the adhesive layer 25 is heated to a predetermined temperature by the heating units 33 and 36, and the conveyor belt 21 is rotated in the circumferential direction CD.

When the temperature of the adhesive layer 25 rises to the target heating temperature, the control unit 100 executes the adhesive layer inspection process shown in FIG. 15 .
First, in step S11, the control unit 100 detects the vibration of the squeegee 43 while the conveyor belt 21 rotates once. Specifically, the control unit 100 causes the position measurement unit 111 to measure the belt rotational position, which is the position on the conveyor belt 21, by counting the number of pulse edges of the detection signal from the encoder 27. The control unit 100 causes the detection unit 60 to detect the vibration of the squeegee 43 until the conveyance belt 21 completes one rotation based on the belt rotational position measured by the position measurement unit 111. In this way, the control unit 100 obtains the vibration detection result of the squeegee 43 for one rotation of the conveyor belt.

In the next step S12, the control unit 100 acquires the vibration intensity based on the squeegee vibration detection result for one rotation of the conveyor belt. When the detection unit 60 is an acceleration sensor, the average vibration acceleration |Ava| may be calculated as the vibration intensity during one rotation of the conveyor belt 21. For example, the control unit 100 causes the detection unit 60 to detect the total value of the absolute value |Av| of the vibration acceleration detected by the detection unit 60 while the conveyance belt 21 rotates once. The average vibration acceleration |Ava| is calculated by dividing by the number of detected points. Furthermore, the average amplitude of the vibration of the squeegee 43 during one rotation of the conveyor belt 21 may be calculated from the vibration acceleration that is the detection result of the detection unit 60. Further, when the detection unit 60 is a gyro sensor, the average vibration angular velocity or the average vibration angular acceleration may be calculated as the vibration intensity during one rotation of the conveyor belt 21. From the detection result of the detection unit 60, the average amplitude of vibration of the squeegee 43 during one rotation of the conveyor belt 21 may be calculated. In this step S12, the control unit 100 calculates the value of a parameter that can evaluate the vibration intensity used to determine the deterioration of the adhesive layer 25, based on the detection result detected by the detection unit 60 during one rotation of the conveyor belt 21. However, the parameters may be any as long as they can evaluate vibration. For example, it may be power spectral density (PSD), acceleration spectral density (ASD), power spectral density (PS) or energy spectral density (ESD).

In step S13, the control unit 100 determines whether the adhesive layer 25 has deteriorated. Specifically, the control unit 100 determines whether the vibration intensity is less than the threshold SD by comparing the vibration intensity with the threshold SD read from the storage unit 112. If the vibration intensity is equal to or greater than the threshold SD, the control unit 100 determines that the adhesive layer 25 has not deteriorated. On the other hand, if the vibration intensity is less than the threshold SD, the control unit 100 determines that the adhesive layer 25 has deteriorated. If the control unit 100 determines that the adhesive layer 25 has not deteriorated, it ends the routine, and if it determines that the adhesive layer 25 has deteriorated, it proceeds to step S14.

In step S14, the control unit 100 notifies that the adhesive layer 25 has deteriorated. The control unit 100 notifies the display unit 14 that the adhesive layer 25 has deteriorated, as shown in FIG. 14, for example. In the example shown in FIG. 14, the control unit 100 displays on the display unit 14 information that the adhesive layer 25 has deteriorated and information that prompts the operator to replace the adhesive layer 25.

In step S15, the control unit 100 adjusts the heating temperature of the adhesive layer 25. Specifically, the control unit 100 adjusts the heating temperature of at least one of the first heating unit 33 and the second heating unit 36 in order to increase the adhesive force of the adhesive layer 25. Since the adhesive layer 25 in this example is of a heat-sensitive type, the control unit 100 increases the temperature of the adhesive layer 25 by increasing the heating temperature of at least one of the first heating unit 33 and the second heating unit 36. . This rise in temperature of the adhesive layer 25 increases the adhesive strength of the thermosensitive adhesive layer 25. Therefore, even when the adhesive layer 25 is deteriorated, the medium M can be attached to the surface 25A of the adhesive layer 25 with the necessary adhesive force.

In this way, the user who sees the message etc. on the display unit 14 that includes the information that the adhesive layer 25 has deteriorated and the information that urges the replacement of the adhesive layer 25 stops the operation of the printing device 11 or stops printing. The adhesive layer 25 is replaced with a new one at the timing when the operation of the printing device 11 is stopped. For example, the user replaces the adhesive layer 25 by removing the old adhesive layer 25 from the conveyor belt 21 and applying a new adhesive to the surface of the belt base material 21B. Furthermore, if the adhesive layer 25 is an adhesive film, adhesive tape, or the like, the user replaces the adhesive film, adhesive tape, or the like.

<Effects of embodiment>
According to the embodiment, the following effects can be obtained.
(1) The conveying device 20 has an adhesive layer 25 to which the medium M can be attached, and a conveyor belt 21 capable of conveying the medium M attached to the adhesive layer 25 in the conveying direction Y, and a surface of the adhesive layer 25. A removing section 44 having a squeegee 43 that comes into contact with the squeegee 43 to remove deposits attached to the surface, and a detecting section 60 that is attached to the removing section 44 and detects vibrations of the squeegee 43 that occur when the conveying belt 21 moves in the conveying direction Y. Equipped with.

Depending on the location where the detection unit 60 is provided, there is a possibility that the detection accuracy will differ. For example, as an example of a configuration for detecting the vibration of the squeegee 43, a detection unit 60 is provided at a predetermined location on the conveyor belt 21, and the detection unit 60 detects the vibration of the squeegee 43 based on the detection of the vibration of the conveyor belt 21. A detection configuration is possible. However, the conveyor belt 21 is affected by vibrations generated when the drive roller 23A rotates, and vibrations generated when the brush 42 performs a cleaning operation to remove dust attached to the surface 25A of the conveyor belt 21 by a motor (not shown). , are affected by vibrations generated by a drive system separate from the squeegee 43. Since the detection unit 60 is affected by vibrations (noise) generated by another drive system, there is a possibility that the detection accuracy of the vibration of the squeegee 43 by the detection unit 60 will be reduced.

In this embodiment, the detection section 60 is attached to the removal section 44 having the squeegee 43. According to this configuration, the removal section 44 having the squeegee 43 is less susceptible to vibrations (noise) generated by another drive system. Since the detection unit 60 can detect the vibration of the squeegee 43 in a place that is not easily affected by noise, the detection accuracy of the vibration of the squeegee 43 is improved.

(2) The removal section 44 has a mounting section 70 to which the detection section 60 is attached. The mounting portion 70 is configured to have lower (shear) rigidity than the peripheral portion 80 of the mounting portion 70 . According to this configuration, the accuracy in detecting vibrations of the squeegee 43 is improved by making the attachment portion 70 easily distorted.

(3) The removing section 44 has a squeegee holder 51 to which the squeegee 43 is fixed. The detection unit 60 is provided inside the squeegee holder 51. According to this configuration, the detection unit 60 is provided in the squeegee holder 51 where vibrations of the squeegee 43 are difficult to damp. That is, since the detection unit 60 can be provided in a portion where vibrations are difficult to damp, the accuracy of detecting deterioration of the adhesive layer 25 is improved. Further, the detection unit 60 is provided inside the squeegee holder 51. That is, the squeegee holder 51 functions as a cover to prevent foreign matter such as dust from adhering to the detection section 60. It is possible to suppress the occurrence of failures and malfunctions of the detection section 60 due to foreign matter such as dust adhering to the detection section 60.

(4) It includes a control unit 100 that makes a determination regarding deterioration of the adhesive layer 25 based on the detection result of the detection unit 60, and a display unit 14 that notifies information. When the control unit 100 determines that the adhesive layer 25 has deteriorated, the control unit 100 causes the display unit 14 to notify information indicating that the adhesive layer 25 has deteriorated. According to this configuration, the user can perceive the deterioration of the adhesive layer 25.

(5) Heating sections 33 and 36 that heat the adhesive layer 25 are provided. The adhesive layer 25 includes an adhesive layer whose adhesive force increases as the temperature increases. The control unit 100 adjusts the temperature of the adhesive layer 25 using the heating units 33 and 36 depending on whether the adhesive layer 25 has deteriorated. According to this configuration, by increasing the temperature of the adhesive layer 25, the adhesive force of the deteriorated adhesive layer 25 can be temporarily increased.

(6) A pressing portion 34 that presses the adhesive layer 25 is provided. The adhesive layer 25 includes an adhesive layer 25 whose adhesive force increases as pressure increases. The control unit 100 adjusts the pressure of the pressing unit 34 on the adhesive layer 25 depending on whether the adhesive layer 25 has deteriorated. According to this configuration, by increasing the pressure on the adhesive layer 25, the adhesive force of the deteriorated adhesive layer 25 can be temporarily increased.

(7) The printing device 11 includes a conveyor belt 21, a printing section 30, a squeegee 43, and a detection section 60. The conveyance belt 21 has an adhesive layer 25 to which the medium M can be attached, and can convey the medium M attached to the adhesive layer 25 in the conveyance direction Y. The printing unit 30 prints on the medium M conveyed by the conveyor belt 21. The detection unit 60 is attached to the squeegee 43, and when it comes into contact with the surface of the adhesive layer 25, detects vibrations of the squeegee 43 that occur when the conveyance belt 21 moves in the conveyance direction Y. According to this configuration, the vibration of the squeegee 43 can be detected in a location that is not susceptible to the influence of noise and the like, so the detection accuracy of the vibration of the squeegee 43 is improved.

(Second embodiment)
Next, a second embodiment will be described with reference to FIGS. 16 to 20. The basic configuration of the printing device 11 is the same as that of the first embodiment. This embodiment differs from the first embodiment in that the transport device 20 includes a plurality of detection units 60 that detect vibrations of the squeegee 43.

<Configuration of removal unit 44 and detection unit 60>
FIG. 16 shows a cross section of the removal section 44 viewed from the transport direction Y. As shown by the two-dot chain line in FIG. 16, the adhesive layer 25 constituting the conveyance belt 21 is divided into a plurality of areas BA1 to BAN in the width direction X that intersects the conveyance direction Y. In the example shown in FIG. 16, the adhesive layer 25 is divided in the width direction X into N areas BA1 to BAN (N is a natural number of 2 or more). The removal unit 44 is provided with a plurality of detection units 60 that detect vibrations of the squeegee 43 in each of the plurality of areas BA1 to BAN at positions corresponding to each of the plurality of areas BA1 to BAN. That is, the removal unit 44 is provided with N detection units 60 that detect vibrations of the squeegee 43 in each of N areas BA1 to BAN. A plurality of (N) detection units 60 are provided including a first detection unit 61 and a second detection unit 62 different from the first detection unit 61. When there are N detection units 60, the N detection units 60 include a first detection unit 61, a second detection unit 62, . . . , an N-th detection unit 6N.

The control unit 100 causes the display unit 14, which is an example of a notification unit, to display information indicating the area where the adhesive layer 25 has deteriorated based on the detection results in each of the plurality of areas BA1 to BAN by the plurality of detection units 60. This will notify the user.

On the squeegee 43, different marks 90 are provided at portions corresponding to each of the plurality of areas BA1 to BAN. The control unit 100, as an example of a notification unit, marks 90 on the squeegee 43 corresponding to the area where the adhesive layer 25 has deteriorated based on the detection results in each of the plurality of areas BA1 to BAN by the plurality of detection units 61 to 6N. The operator is notified by displaying it on a certain display unit 14. The user can identify the deteriorated area of the adhesive layer 25 from the information regarding the mark 90 displayed on the display unit 14.

For example, as shown in FIG. 17, if the squeegee 43 is attached in an inclined position in the width direction Occur. If this kind of uneven contact occurs, the area of the adhesive layer 25 that is hit too strongly by the squeegee 43 will deteriorate early. In this example, deterioration can be detected for each of the plurality of areas BA1 to BAN in the adhesive layer 25. Therefore, the control unit 100 detects that the squeegee 43 is unevenly touching the adhesive layer 25 based on detecting deterioration in some of the regions BA1 to BAN.

Note that it is too late to detect the uneven contact of the squeegee 43 after the adhesive layer 25 has deteriorated, so in this example, apart from the deterioration of the adhesive layer 25, each area BA1 to BAN of the adhesive layer 25 reaches a deteriorated state. The previous degree of deterioration is detected for each area BA1 to BAN. The control unit 100 determines whether the degree of deterioration in some of the plurality of areas BA1 to BAN is higher than the degree of deterioration in other areas by exceeding an allowable range. Then, if the degree of deterioration in some areas is higher than the degree of deterioration in other areas by exceeding an allowable range, the control unit 100 determines that there is uneven contact of the squeegee 43. When the control unit 100 determines that there is a partial hit based on the degree of deterioration in each of the areas BA1 to BAN, the control unit 100 notifies the user of this by displaying information to the effect that there is a partial hit on the display unit 14, which is an example of a notification unit. do.

Similarly to the first embodiment, when the temperature of the adhesive layer 25 rises to the target heating temperature, the control unit 100 executes the adhesive layer inspection process shown in FIG. 18.
First, in step S21, the control unit 100 detects the vibration of the squeegee 43 during one rotation of the conveyor belt 21 for each region BA1 to BAN obtained by dividing the adhesive layer 25 in the width direction X. Specifically, the control unit 100 detects vibrations in the areas BA1 to BAN of the adhesive layer 25 using the plurality of detection units 61 to 6N until the conveyor belt 21 completes one rotation based on the belt rotational position measured by the position measurement unit 111. to be detected. The control unit 100 obtains vibration detection results for each of the areas BA1 to BAN of the squeegee 43 for one rotation of the conveyor belt.

In the next step S22, the control unit 100 obtains the vibration intensity for each area BA1 to BAN of the squeegee 43 based on the vibration detection results of the plurality of detection units 61 to 6N. When the detection units 61 to 6N are acceleration sensors, the average vibration acceleration |Ava| may be calculated as the vibration intensity during one rotation of the conveyor belt 21. Furthermore, the average amplitude for each of the areas BA1 to BAN may be calculated from the vibration acceleration that is the detection result of the detection units 61 to 6N. Further, when the detection unit 60 is a gyro sensor, the average vibration angular velocity or the average vibration angular acceleration may be calculated as the vibration intensity during one rotation of the conveyor belt 21. Furthermore, the average amplitude for each of the areas BA1 to BAN may be calculated from the vibration angular velocities that are the detection results of the detection units 61 to 6N. Further, a parameter that can evaluate the vibration intensity used to determine the deterioration of the adhesive layer 25, which is calculated based on the detection results detected by the detection units 61 to 6N during one rotation of the conveyor belt 21, is, for example, the power spectral density ( PSD), acceleration spectral density (ASD), power spectrum (PS) or energy spectral density (ESD).

In step S23, the control unit 100 determines whether the adhesive layer 25 has deteriorated. Specifically, the control unit 100 reads the threshold SD corresponding to the heating temperature of the adhesive layer 25 at that time from the storage unit 112, and determines whether there is an area among the plurality of areas BA1 to BAN where the vibration intensity is less than the threshold SD. Determine whether or not. The control unit 100 determines that the adhesive layer 25 has not deteriorated if the vibration intensities for each of the areas BA1 to BAN are all equal to or greater than the threshold value SD. On the other hand, the control unit 100 determines that the adhesive layer 25 has deteriorated if there is one region or a predetermined plurality of regions where the vibration intensity of each region BA1 to BAN is less than the threshold SD. If the control unit 100 determines that the adhesive layer 25 has not deteriorated, the process proceeds to step S24. On the other hand, if the control unit 100 determines that the adhesive layer 25 has deteriorated, the process proceeds to step S26.

In step S24, the control unit 100 determines whether there is a difference in the degree of deterioration of the adhesive layer 25 between the areas BA1 to BAN. If there is a difference in the degree of deterioration of the adhesive layer 25 between the areas BA1 to BAN that exceeds the allowable range, the control unit 100 proceeds to step S25. On the other hand, if there is no difference in the degree of deterioration of the adhesive layer 25 between the areas BA1 to BAN that exceeds the allowable range, the control unit 100 ends the routine. Here, in this example, the average vibration intensity shown in FIG. 13 is used as the degree of deterioration. Further, the degree of deterioration can be expressed as the strength of the squeegee 43 hitting the adhesive layer 25. In that case, this step S24 is also a process in which the control unit 100 determines whether there is a difference in the contact strength of the squeegee 43 against the adhesive layer 25 between the areas BA1 to BAN that exceeds an allowable range. If there is a difference in the contact strength of the squeegee 43 against the adhesive layer 25 between the areas BA1 to BAN that exceeds the allowable range, the process advances to step S25.

Note that the squeegee 43 of this embodiment is composed of one member extending in the width direction X of the adhesive layer 25. Therefore, when the squeegee 43 is attached in an attitude tilted in the width direction X, the uneven contact state shown in FIG. 17 occurs. On the other hand, the squeegee 43 may be constituted by a plurality of squeegee members lined up in the width direction X of the adhesive layer 25. In this case, the difference in contact strength against the adhesive layer 25 may be determined for each squeegee member constituting the squeegee 43. In this way, it is possible to determine whether or not there is variation not only in the uneven contact of the squeegee 43 but also in the contact strength of the plurality of squeegee members against the adhesive layer 25. The control unit 100 may determine for each squeegee member whether the contact strength of the plurality of squeegee members forming the squeegee 43 against the adhesive layer 25 falls outside of an appropriate allowable range. In this case, if there is a squeegee member whose contact strength against the adhesive layer 25 is out of the appropriate allowable range, the control unit 100 sends information on the mark 90 corresponding to the relevant squeegee member and information prompting adjustment of the contact strength. It may be displayed on the display unit 14. Further, in the example of such a squeegee 43, a plurality of areas BA1 to BAN dividing the adhesive layer 25 in the width direction X may be set in association with a plurality of squeegee members.

In step S25, the control unit 100 notifies that the squeegee 43 is hitting one side. For example, as shown in FIG. 19, the control unit 100 causes the display unit 14 to display information indicating that the squeegee is hitting one side abnormally and information indicating the area in which the squeegee 43 should be adjusted. In the example shown in FIG. 19, a message is displayed on the display unit 14, including information that the squeegee 43 is hitting one side, and information that urges adjustment of areas No. 1 and No. 2. .

Further, the control unit 100 may cause the display unit 14 to display the display content shown in FIG. 20 instead of the display content shown in FIG. 19. The control unit 100 causes the display unit 14 to display a schematic diagram 91 of the removal unit 44, as shown in FIG. In the schematic diagram 91 of the removal unit 44 displayed on the display unit 14, an area that requires adjustment due to uneven contact of the squeegee 43 is highlighted.

As shown in FIGS. 16 and 17, marks 90 are attached to the squeegee 43 to allow individual identification of a plurality of areas BA1 to BAN. The mark 90 is, for example, a mark with different characters such as numbers or alphabets, a mark with a different shape, a mark differentiated by color, or a mark that can be identified by a combination of two or more of these. Therefore, the user can visually recognize the area to be adjusted by the squeegee 43 from the highlighted area in the schematic diagram 91 of the removal unit 44 displayed on the display unit 14 and the mark 90 attached to the highlighted area.

As shown in FIG. 17, an area is marked with the same mark 90 as the mark 90 of the area BAk to be adjusted displayed on the display unit 14 from among a plurality of marks 90 including numbers attached to the squeegee 43. The squeegee 43 can be adjusted using BAk. Therefore, the user can easily specify which area of the squeegee 43 should be adjusted from the mark 90 attached to the squeegee 43 and can adjust the uneven contact of the squeegee 43. In this manner, when the squeegee 43 makes uneven contact with the adhesive layer 25, the user is notified of the uneven contact before the adhesive layer 25 deteriorates due to the uneven contact. Therefore, the user can know at an early stage that the squeegee 43 is in the uneven contact state, and can adjust the squeegee 43 to a normal state without uneven contact.

In step S26, the control unit 100 notifies that the adhesive layer 25 has deteriorated. The control unit 100 causes the display unit 14 to display information indicating that the adhesive layer 25 has deteriorated, for example, similarly to FIG. 14 in the first embodiment. Note that when it is determined that the squeegee 43 has deteriorated, the control unit 100 also performs a determination process similar to the process in step S25, and when the deterioration of the squeegee 43 is caused by uneven hitting, it is determined that the uneven hitting is the cause. You may also notify that this is the case.

In step S27, the control unit 100 adjusts the heating temperature of the adhesive layer 25. Specifically, the control unit 100 adjusts the heating temperatures of the heating units 33 and 36 in a direction that increases the adhesive force of the adhesive layer 25. Since the adhesive layer 25 in this example is of a heat-sensitive type, the temperature of the adhesive layer 25 increases when the control unit 100 increases the heating temperature of the heating units 33 and 36. This rise in temperature of the adhesive layer 25 increases the adhesive strength of the thermosensitive adhesive layer 25. Therefore, even when the adhesive layer 25 is deteriorated, the medium M can be attached to the surface 25A of the adhesive layer 25 with the necessary adhesive force.

In this way, the user who sees the information about the deterioration of the adhesive layer 25 and the message prompting the replacement of the adhesive layer 25 displayed on the display unit 14 can either stop the operation of the printing device 11 or stop the printing device 11 by stopping printing. At the timing when the operation of 11 is stopped, the adhesive layer 25 is replaced with a new one.

According to this second embodiment, the following effects can be obtained.
(10) The detection unit 60 is used as the first detection unit 61, and the adhesive layer 25 is divided into a plurality of areas BA1 to BAN in the width direction X that intersects the conveyance direction Y. In the removal unit 44, a plurality of detection units 61 to 6N including a first detection unit 61 and a second detection unit 62 different from the first detection unit 61 detect vibrations of the squeegee 43 in a plurality of areas BA1 to BA1. It is provided at a position corresponding to each of the plurality of areas BA1 to BAN so as to detect each BAN. The control unit 100 causes the display unit 14 to notify information indicating the area where the adhesive layer 25 has deteriorated based on the detection results in each of the plurality of areas BA1 to BAN by the plurality of detection units 61 to 6N. According to this configuration, if a specific area (for example, one area in the width direction There is a high possibility that contact with the layer 25 will significantly reduce the life of the squeegee 43. The control unit 100 notifies the user of this abnormal area, allowing the user to perceive that the squeegee 43 is maladjusted.

(11) In the squeegee 43, different marks 90 are provided at portions corresponding to (contacting) each of the plurality of areas BA1 to BAN. The control unit 100 causes the display unit 14 to notify the mark 90 of the squeegee 43 corresponding to the area where the adhesive layer 25 has deteriorated, based on the detection results in each of the plurality of regions by the plurality of detection units 60. According to this configuration, the user can recognize the portion where the squeegee 43 is strongly in contact with the adhesive layer 25 by perceiving the mark 90 notified by the display unit 14.

Note that the above embodiment can also be modified into forms such as the following modification examples. Furthermore, a further modification may be made by appropriately combining the above embodiment and the modifications shown below, or a further modification may be made by appropriately combining the modifications shown below.

- In the first embodiment, the squeegee 43 included in the transport device 20 is used as the abutting member, but the abutting member is not limited to the squeegee 43. For example, a dedicated abutment member for detecting deterioration of the adhesive layer 25 may be provided in the conveying device. In this case, the contact member may have a structure in which it constantly contacts the conveyor belt 21, or may have a removable structure. In the case of a removable type, the user attaches the contact member to the conveyance device 20 when determining whether or not the adhesive layer 25 has deteriorated. Further, the abutting member is always attached to the conveying device 20, but when not in use it is placed in a retracted position away from the adhesive layer 25, and when in use the adhesive layer 25 is used to determine whether or not the adhesive layer 25 has deteriorated. It may be a movable type that is placed in an abutting position where it comes into contact with. In this way, when a dedicated abutting member is used, it is not limited to a material or shape suitable for wiping like the squeegee 43, but an appropriate abutting member that can generate vibrations that can easily determine the deterioration of the adhesive layer 25 can be used. You can choose the material and shape. In other words, it is possible to select the material and shape of the contact member that is likely to generate large vibrations when the conveyor belt 21 moves in the conveyance direction Y (circling direction CD) while in contact with the adhesive layer 25.

- In the case of a configuration using a dedicated abutting member, the detection section 60 may be provided on the dedicated abutting member itself. Further, the detection unit 60 may be provided in a holder that supports a dedicated contact member. In this case, the detection unit 60 may be placed inside the holder.

- In the case of a configuration using a dedicated abutting member, a plurality of detection portions 61 to 6N may be provided at intervals in the width direction X on the dedicated abutting member itself, instead of the configuration of the second embodiment. Further, a plurality of detection parts 61 to 6N may be provided at intervals in the width direction X on a holder that supports a dedicated contact member. In this case, a plurality of detection units 61 to 6N may be arranged inside the holder.

- When the detection section 60 is provided in a holder that supports a dedicated abutting member, the holder may be provided with an attachment section 70 whose rigidity is smaller than other parts, and the detection section 60 may be attached to this attachment section 70.

- In the embodiment, the vibration of the squeegee 43 during one rotation of the conveyor belt 21 is detected, but the conveyor belt 21 moves in the conveyance direction Y (circling direction CD) only in a part of the one rotation of the conveyor belt 21. ) may detect the vibration of the squeegee 43 when it rotates.

- The conveying device 20 may include a plurality of squeegees 43, and in this case, the detection sections 61 to 6N may be provided for each removal section 44 having a squeegee 43, or one of the plurality of removal sections 44 may be provided with a detection section 61 to 6N. One detecting section 60 may be provided only in the removing section 44. Further, a plurality of detection sections 61 to 6N may be provided at intervals in the width direction X for each of the plurality of removal sections 44, or only one of the plurality of removal sections 44 may be provided with A plurality of detection units 61 to 6N may be provided at intervals.

- The conveyor belt 21 may be a pressure-sensitive type, in which the adhesive layer 25 is sensitive to pressure and is imparted with adhesive force, instead of a heat-sensitive type in which the adhesive layer 25 is imparted with adhesive force in response to pressure. The adhesive layer 25 has a property that the adhesive strength increases as the pressure increases. The conveying device 20 in which the conveying belt 21 having the pressure-sensitive adhesive layer 25 is used includes a pressing section 34 that presses the adhesive layer 25. For example, in the first and second embodiments, the pressure roller 35 may also serve as the pressing section 34, or a pressing section may be provided separately from the pressure roller 35. When the controller 100 determines that the adhesive layer 25 has deteriorated based on the detection result of the vibration of the squeegee 43 detected by the detector 60, the controller 100 controls the pressing part depending on whether the adhesive layer 25 has deteriorated or not. The pressure on the adhesive layer 25 of 34 is adjusted. At this time, the control unit 100 performs control to increase the pressing force with which the pressure roller 35 presses the medium M when the adhesive layer 25 has deteriorated. When the control unit 100 determines that the adhesive layer 25 has deteriorated, the control unit 100 causes the display unit 14 to display information indicating that the adhesive layer 25 has deteriorated and information urging replacement of the adhesive layer 25. According to this configuration, by increasing the pressure with which the adhesive layer 25 is pressed, the adhesive force of the deteriorated adhesive layer 25 can be temporarily increased. Therefore, high-quality printing can be continuously performed from the time when information indicating that the adhesive layer 25 has deteriorated until the adhesive layer 25 is actually replaced. Therefore, even when the adhesive layer 25 is deteriorated, the medium M can be attached to the surface 25A of the adhesive layer 25 with the necessary adhesive force.

- The determination regarding the deterioration of the adhesive layer 25 performed by the control unit 100 based on the detection result of the detection unit 60 is not limited to determining whether the adhesive layer 25 has deteriorated, but is configured to determine the degree of deterioration of the adhesive layer 25. But that's fine. Further, the control unit 100 may both determine whether the adhesive layer 25 has deteriorated and determine the degree of deterioration.

- The notification unit is not limited to the display unit 14, and may be one that provides notification by voice or sound. The notification unit is, for example, a speaker, and may notify information that the adhesive layer 25 has deteriorated by, for example, audio guidance from the speaker.

- The printing device 11 is not limited to a textile printing device that prints on a medium M such as cloth, but may be an inkjet printer that prints on a medium M such as cut paper or roll paper. Further, the printing device 11 may be a multifunction device including a belt-type conveying device 20.

- The printing device 11 is not limited to a serial printer or a line printer, but may be a lateral printer in which the discharge section 31 is movable in two directions, the cross direction X and the transport direction Y.
- When the printing device 11 is a textile printing device, it may also include a dyeing section that dyes the medium M by immersing the medium M in a liquid such as ink. Further, the ejection unit 31 is not limited to an inkjet type ejection head, but may be a dispenser or the like that ejects liquid. Alternatively, the printing device 11 may have both the ejection section 31 and a dyeing section that drops liquid such as ink onto the medium M.

- The conveying device 20 may be installed in a printing device other than the inkjet printing device 11. For example, it may be a conveyor device having a conveyor belt that is installed in a printer equipped with a dot impact print head. Alternatively, the present invention may be a conveyance device having a conveyance belt, which is installed in a printer equipped with a print head of a thermal transfer printing method.

Hereinafter, the technical ideas understood from the embodiments and modified examples will be described together with their effects.
(A) The conveying device has an adhesive layer to which a medium can be attached, a conveyor belt capable of conveying the medium attached to the adhesive layer in the conveying direction, and a conveyor belt that is in contact with the surface of the adhesive layer to The apparatus includes a removing section having a squeegee for removing deposits attached to the object, and a detecting section attached to the removing section to detect vibrations of the squeegee that occur when the conveying belt moves in the conveying direction.

According to this configuration, the vibration of the squeegee can be detected in a location that is not easily affected by noise, so the detection accuracy of the vibration of the squeegee is improved.
(B) In the above-mentioned conveyance device, the removal section may include a mounting section to which the detection section is attached, and the mounting section may be configured to have lower rigidity than a peripheral portion of the mounting section.

According to this configuration, the accuracy of detecting the vibration of the squeegee is improved by making the attachment part easily distorted.
(C) In the above conveyance device, the removal section may include a squeegee holder to which the squeegee is fixed, and the detection section may be provided inside the squeegee holder.

According to this configuration, the detection section is provided in the squeegee holder where vibrations of the squeegee are difficult to damp. That is, since the detection section can be provided in a portion where vibrations are difficult to damp, the accuracy of detecting deterioration of the adhesive layer is improved. Further, the detection section is provided inside the squeegee holder. That is, the squeegee holder functions as a cover to prevent foreign matter such as dust from adhering to the detection section. It is possible to suppress the occurrence of malfunctions and malfunctions in the detection section due to foreign matter such as dust adhering to the detection section.

(D) The conveyance device includes a control unit that makes a determination regarding deterioration of the adhesive layer based on the detection result of the detection unit, and a notification unit that notifies information, and the control unit is configured to control the adhesive layer. If it is determined that the layer has deteriorated, the notification unit may notify information indicating that the adhesive layer has deteriorated.

According to this configuration, the user can perceive the deterioration of the adhesive layer.
(E) In the conveying device, when the detecting section is a first detecting section and the adhesive layer is divided into a plurality of regions in a width direction intersecting the conveying direction, the removing section includes the first detecting section. and a second detection section different from the first detection section, the plurality of detection sections correspond to each of the plurality of regions so as to detect the vibration of the squeegee for each of the plurality of regions. The control section causes the notification section to notify information indicating an area where the adhesive layer has deteriorated based on the detection results in each of the plurality of regions by the plurality of detection sections.

According to this configuration, if a specific area (for example, one side area in the width direction) out of multiple areas has deteriorated, only a part of the squeegee will come into strong contact with the adhesive layer due to maladjustment of the squeegee. , there is a high possibility that the condition will significantly shorten the life of the squeegee. The control unit notifies the user of this abnormal area, allowing the user to perceive maladjustment of the squeegee.

(F) In the conveying device, in the squeegee, different marks are provided in portions corresponding to the respective regions of the plurality of regions, and the control section is configured to detect each region of the plurality of regions by the detection section. The notifying unit may be made to notify the mark on the squeegee that corresponds to the area where the adhesive layer has deteriorated based on the detection result in .

According to this configuration, the user can recognize the portion where the squeegee is strongly in contact with the adhesive layer by perceiving the mark notified by the notification section.
(G) The conveying device includes a heating unit that heats the adhesive layer, the adhesive layer includes an adhesive layer whose adhesive strength increases as the temperature increases, and the controller determines whether the adhesive layer has deteriorated. Depending on whether or not the heating unit is used, the temperature of the adhesive layer may be adjusted by the heating unit.

According to this configuration, by raising the temperature of the adhesive layer, the adhesive force of the deteriorated adhesive layer can be temporarily increased.
(H) The conveyance device includes a pressing unit that presses the adhesive layer, the adhesive layer includes an adhesive layer whose adhesive strength increases as pressure increases, and the control unit determines whether the adhesive layer has deteriorated. Depending on whether or not the pressure is applied to the adhesive layer, the pressure of the pressing section may be adjusted.

According to this configuration, by increasing the pressure on the adhesive layer, the adhesive force of the deteriorated adhesive layer can be temporarily increased.
(I) The printing device includes a conveyor belt that has an adhesive layer to which a medium can be attached, and that can convey the medium attached to the adhesive layer in a conveyance direction, and prints on the medium conveyed by the conveyor belt. a removing section having a squeegee that comes into contact with the surface of the adhesive layer to remove deposits attached to the surface; and a removing section that is attached to the removing section and is attached to the removing section when the conveying belt moves in the conveying direction. and a detection unit that detects vibrations of the squeegee that occur.

According to this configuration, since the detection result obtained by detecting the vibration of the squeegee in contact with the adhesive layer is used for determination, deterioration of the adhesive layer can be detected with a relatively simple configuration.

DESCRIPTION OF SYMBOLS 11...Printing device, 12...Housing, 13...Operation unit, 14...Display unit as an example of a notification unit, 15...Liquid supply source, 16...Cover, 17...Support stand, 19...Inner frame, 20...Transporting device , 21... Conveyance belt, 21B... Belt base material, 22... Conveyance unit, 23A... Drive roller, 23B... Followed roller, 24... Outer circumferential surface, 24a... Upper surface part, 24b... Curved surface part, 24c... Lower surface part, 24d... Curved surface Part, 25...adhesive layer, 25A...surface, 26...transport motor, 27...encoder, 30...printing part, 31...discharge part, 32...carriage, 33...first heating part which is an example of heating part, 33A...heater , 34...Press section, 35...Pressure roller, 36...Second heating section, 37...Drying section, 38...Hose, 40...Washing section, 41...Cleaning tank, 41A...Rear wall, 41B...Side wall, 42...Brush , 43... Squeegee, 43A... Base, 43B... Blade part, 44... Removal part, 45... Lifting mechanism, 46... Cylinder, 47... Frame, 48... Side plate, 49... Plate member, 51... Squeegee holder, 52... First Holding member, 53...Second holding member, 54...Bracket, 55...First portion, 56...Second portion, 57-59...Screw, 60...Detection section, 61...First detection section, 62...Second detection section M ... Medium, Q... Cleaning liquid as an example of liquid, AP... Pasting start position, BP... Brushing position, WP... Wiping position, BA1... First area, BA2... Second area, BAN... Nth area, X... Width direction , Y...conveying direction, Z...vertical direction, CD...circling direction, α...width direction, β...extending direction, γ...vertical direction.

Claims (9)

a conveyor belt having an adhesive layer to which a medium can be attached, and capable of conveying the medium attached to the adhesive layer in a conveying direction;
a removal unit having a squeegee that comes into contact with the surface of the adhesive layer to remove deposits attached to the surface;
a detection unit that is attached to the removal unit and detects vibrations of the squeegee that occur when the conveyance belt moves in the conveyance direction;
A conveyance device comprising: The removal section has a mounting section to which the detection section is attached,
2. The conveying device according to claim 1, wherein the mounting portion has lower rigidity than a peripheral portion of the mounting portion. The removal unit includes a squeegee holder to which the squeegee is fixed,
The conveyance device according to claim 1 or 2, wherein the detection section is provided inside the squeegee holder. a control unit that makes a determination regarding deterioration of the adhesive layer based on the detection result of the detection unit;
a notification department for reporting information;
Equipped with
4. The control unit, when determining that the adhesive layer has deteriorated, causes the notification unit to notify information indicating that the adhesive layer has deteriorated. conveyance device. When the detection section is a first detection section and the adhesive layer is divided into a plurality of regions in a width direction intersecting the conveyance direction,
The removal unit includes a plurality of detection units including the first detection unit and a second detection unit different from the first detection unit, which detect the vibration of the squeegee in each of the plurality of regions. is provided at a position corresponding to each area of the plurality of areas, as shown in FIG.
4. The control section causes the notification section to notify information indicating an area where the adhesive layer has deteriorated, based on the detection results in each of the plurality of regions by the plurality of detection sections. The conveying device described in . In the squeegee, different marks are provided in portions corresponding to each region of the plurality of regions,
The control unit may cause the notification unit to notify the mark on the squeegee corresponding to the area where the adhesive layer has deteriorated, based on the detection results in each of the plurality of areas by the plurality of detection units. The conveying device according to claim 5. comprising a heating section that heats the adhesive layer,
The adhesive layer includes an adhesive layer whose adhesive strength increases as the temperature increases,
The conveying device according to any one of claims 4 to 6, wherein the control unit adjusts the temperature of the adhesive layer using the heating unit depending on whether the adhesive layer has deteriorated. . comprising a pressing part that presses the adhesive layer,
The adhesive layer includes an adhesive layer whose adhesive strength increases as pressure increases,
The conveying device according to any one of claims 4 to 7, wherein the control unit adjusts the pressure of the pressing unit against the adhesive layer depending on whether or not the adhesive layer has deteriorated. . a conveyor belt having an adhesive layer to which a medium can be attached, and capable of conveying the medium attached to the adhesive layer in a conveying direction;
a printing unit that prints on the medium conveyed by the conveyor belt;
a removal unit having a squeegee that comes into contact with the surface of the adhesive layer to remove deposits attached to the surface;
a detection unit that is attached to the removal unit and detects vibrations of the squeegee that occur when the conveyance belt moves in the conveyance direction;
A printing device comprising:

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