JP2016199369A - Conveyance device and printer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a conveyance device and printer which can suppress deflection deformation of plural types of roll-shaped media different in lengths in the shaft direction.SOLUTION: A conveyance device comprises: a support shaft 41 which is inserted to a shaft hole 27 provided in a core material 26 of a roll-shaped medium 21; and a holding part 22 which holds both ends of the support shaft 41 rotatably. The support shaft 41 includes protrusion parts 45 which can protrude in a direction intersecting the shaft direction on both a base end region where the first end of the roll-shaped medium 21 is arranged and a tip region where the second end of the roll-shaped medium 21 is arranged, and the number of the protrusion parts 45 provided in the tip region is larger than the number of the protrusion parts 45 provided in the base end region.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a transport apparatus and a printing apparatus that can hold a roll-shaped medium.

In a printer which is an example of a printing apparatus, in order to prevent the paper tube which is the core material of the roll paper from being bent by its own weight, the rod-shaped paper tube holding through shaft is provided in the hollow portion of the paper tube. Through
There is one that supports a paper tube from the inside by bending a leaf spring attached to the paper tube holding through shaft (for example, Patent Document 1).

JP 2007-320756 A

The bending of the paper tube as described above occurs in such a manner that when the roll paper is attached to the printer with the axial direction horizontal, the vicinity of the center in the axial direction hangs down. Therefore, it is necessary to change the arrangement of the leaf springs of the paper tube holding through shaft according to the size of the roll paper (length in the axial direction) so that the vicinity of the axial center can be supported. When the roll paper having a different length in the axial direction is used in the printer, there is a problem that it is necessary to prepare a paper tube holding through shaft for each size of the roll paper.

Such a problem is not limited to the roll paper used in the printer, but is generally common when holding a roll-shaped medium in which a medium such as paper is wound in a cylindrical shape.
The present invention has been made in view of such circumstances, and an object of the present invention is to provide a transport device and a printing device that can suppress bending deformation of a plurality of types of roll-shaped media having different lengths in the axial direction. It is in.

Hereinafter, means for solving the above-described problems and the effects thereof will be described.
A transport device that solves the above problems includes a support shaft that is inserted into a shaft hole of a core material of a roll-shaped medium, and a holding unit that rotatably holds both ends of the support shaft. In the axial direction, the base end region where the first end of the roll-shaped medium is disposed and the second end of the roll-shaped medium.
In both regions of the distal end region where the end is disposed, there are projecting portions that can project in a direction intersecting the axial direction, and the number of the projecting portions provided in the distal end region is provided in the proximal end region. More than the number of protrusions.

According to this configuration, with the support shaft inserted into the shaft hole of the core material, the core member is made to protrude in the direction intersecting the axial direction by projecting portions provided in the base region and the tip region in the axial direction. Can be supported from the inside, and bending deformation of the roll-shaped medium can be suppressed. In addition, since the number of protrusions arranged in the distal end region is larger than that in the proximal end region, when holding a roll-shaped medium having a different length in the axial direction, the roll-shaped medium is brought closer to the proximal end side of the support shaft. If the protruding portion is protruded in the state, the end on the leading end side of the roll-shaped medium can be supported by any of the plurality of protruding portions arranged in the leading end region. Therefore, by causing the plurality of protruding portions arranged in the axial direction to protrude, it is possible to suppress bending deformation of a plurality of types of roll-shaped media having different lengths in the axial direction.

In the transport apparatus, the support shaft has the protrusion in an intermediate region between the base region and the tip region in the axial direction, and the number of the protrusions provided in the tip region is More than the number of the protrusions provided in the end region and the intermediate region.

According to this configuration, by projecting the protrusion provided in the intermediate region of the support shaft, it is possible to suppress bending deformation near the center due to the weight of the roll-shaped medium when the axial direction is horizontal. In addition, when a roll-shaped medium having a different length in the axial direction is positioned close to the base end side of the support shaft, the central portion of the roll-shaped medium has a leading end of the roll-shaped medium even if the length of the roll-shaped medium is different. Less misalignment. Therefore, even if the number of protrusions provided in the base region and the intermediate region is smaller than that of the tip region, the central part of the roll-shaped medium having a different length in the axial direction can be supported by the protrusions in the intermediate region. . And, by supporting the central portion of the roll-shaped medium having different lengths in the axial direction with a common protrusion, it is possible to suppress an increase in the number of protrusions provided on the support shaft and simplify the configuration of the support shaft. it can.

In the transport apparatus, the support shaft has a handle that protrudes the protrusion by rotation at an end in the axial direction.
According to this configuration, since the handle that protrudes the protrusion by rotation is located at the end of the support shaft in the axial direction, the handle can be easily rotated even when the support shaft is inserted into the shaft hole of the core member. Can do.

In the transport apparatus, the handle is rotatable in a state where the support shaft is held by the holding portion.
According to this configuration, since the protruding portion can be protruded in a state where the support shaft is attached to the holding portion and the roll-shaped medium is in a posture in which the roll-shaped medium is bent, whether or not the bending of the roll-shaped medium is corrected by the protruding portion. The handle can be rotated while checking.

A printing apparatus that solves the above problem includes the transport device and a printing unit that performs printing on a medium transported by the transport device.
According to this configuration, it is possible to suppress a decrease in printing accuracy by suppressing the bending of the roll-shaped medium by the action of the transport device.

Sectional drawing which shows typically one Embodiment of a conveying apparatus and a printing apparatus. The perspective view which looked at the printing apparatus and the roll-shaped medium from the back. The perspective view of a support shaft. Sectional drawing which cut the support shaft with the cut surface orthogonal to an axial direction. Sectional drawing which shows the edge part of the support shaft in which the protrusion part does not protrude. Sectional drawing which shows the edge part of the support shaft from which the protrusion part protrudes. The rear view of the holding part holding the long roll-shaped medium. The rear view of the holding | maintenance part holding the short roll-shaped medium.

Hereinafter, embodiments of a printing apparatus and a conveyance apparatus will be described with reference to the drawings. The conveyance device can roll the rolled medium by holding the rolled medium wound in a roll and rotating the rolled medium. The printing apparatus is a large format printer that performs printing (recording) on a medium conveyed by the conveyance apparatus.

As illustrated in FIG. 1, the printing apparatus 11 includes a casing 12, a leg 13 that supports the casing 12, a support 14 that supports the medium M, and a direction in which the medium M is indicated by an arrow in FIG. 1. Conveying device 1
0 and a printing unit 15 that prints on the medium M in the housing unit 12.

In the following description, one direction along the width direction of the medium M (the direction orthogonal to the paper surface in FIG. 1) is defined as the scanning direction X, and the direction in which the medium M is conveyed at the position where the printing unit 15 performs printing is defined as the conveyance direction Y.
And In the present embodiment, the scanning direction X and the transport direction Y intersect with each other (preferably orthogonal), and both intersect with the gravity direction Z (preferably orthogonal).

The printing unit 15 includes a guide shaft 16 extending in the scanning direction X, a carriage 17 supported by the guide shaft 16, and a liquid ejecting unit 18 that ejects ink, which is an example of a liquid, to the medium M. The carriage 17 reciprocates in the scanning direction X along the guide shaft 16. Liquid injection unit 1
8 is supported by the carriage 17 so as to face the support portion 14. The printing unit 15 prints characters and images on the medium M by ejecting ink from the liquid ejecting unit 18 onto the medium M supported by the support unit 14 when the carriage 17 moves along the scanning direction X. Perform the action.

Next, the configuration of the transport apparatus 10 will be described in detail.
The transport apparatus 10 includes a transport roller pair 19 disposed in the housing unit 12, a feeding unit 20 that feeds the medium M toward the housing unit 12, and the medium M transported by the transport roller pair 19. And a winding unit 30 that winds outside the housing unit 12. In the printing apparatus 11, the downstream side in the transport direction Y in which the winding unit 30 is provided is referred to as the front side with the housing unit 12 as a reference, and the feeding unit 2.
The upstream side in the transport direction Y where 0 is provided is referred to as the rear side.

The feeding unit 20 is supported by a support arm 13a protruding rearward from the leg unit 13,
Arranged upstream of the casing 12 in the transport direction Y. The winding unit 30 is arranged on the downstream side of the housing unit 12 in the transport direction Y in a mode supported by a support frame 13 b extending at the lower end portion of the leg unit 13.

The winding unit 30 is a pair of guide shafts 35 installed on a pair of support frames 13b, and a pair of holding units that rotatably hold a roll-shaped medium 31 that has been rolled up by winding a printed medium M. And a placement portion 34 for temporarily placing the roll-shaped medium 31 when the roll-shaped medium 31 is attached to and detached from the holding portion 32. The holding part 32 is supported by the guide shaft part 35 in such a manner that it can move in the axial direction of the roll-shaped medium 31. In the present embodiment, the axial direction of the roll-shaped medium 31 is a direction along the scanning direction X.

As shown in FIG. 2, the feeding unit 20 is capable of rotating a pair of guide shafts 25 installed on a pair of support arms 13a and a roll-shaped medium 21 in which an unused medium M is rolled up. A pair of holding portions 22 (22A, 22B) to be held by the holder, and a pair of placement portions 24 for temporarily placing the roll-shaped medium 21 when the roll-shaped medium 21 is attached to and detached from the holding portion 22. The holding part 22 is supported by the guide shaft part 25 in such a manner that it can move in the axial direction of the roll-shaped medium 21. In the present embodiment, the axial direction of the roll-shaped medium 21 is a direction along the scanning direction X.

The holding unit 22 includes two types of roll-shaped media 21 having different lengths in the scanning direction X (axial direction).
(21L, 21S) can be held. The holding unit 22 holds the both ends of the roll-shaped medium 21 with the movement in the axial direction. In addition, the roll-shaped media 21L and 21S having different lengths in the axial direction are sandwiched by the holding unit 22 in a state of being brought close to one end side in the axial direction (the side where the holding unit 22A is provided in FIG. 2). In the following description, the roll-shaped medium 2
One end in the axial direction serving as a reference for alignment in 1L and 21S is referred to as a first end, and the other end on the opposite side is referred to as a second end.

The roll-shaped medium 21 is configured by winding a medium M around a cylindrical core material 26. The core material 26 is not necessarily separated from the medium M. For example, the medium M may be wound in a cylindrical shape, and the medium M on the inner peripheral side may be cured with an adhesive or the like to be a core material.

The transport device 10 includes a support shaft 4 that is inserted into a shaft hole 27 included in the core material 26 of the roll-shaped medium 21.
1 is provided. In the support shaft 41, when inserted into the roll-shaped medium 21, the end on the side where the first end of the roll-shaped medium 21 is disposed is the base end, and the second end of the roll-shaped medium 21 is disposed. The end on the side is called the tip. The pair of holding portions 22 (22 </ b> A, 22 </ b> B) includes a bearing portion 29 that rotatably holds both ends of the support shaft 41 and transmits a rotational force to the support shaft 41.

The support shaft 41 inserted through the core material 26 of the roll-shaped medium 21 is held by the holding unit 22 in a state where both ends thereof are rotatable. As the bearing portion 29 rotates, the roll medium 21 rotates with the support shaft 41, whereby the medium M wound around the core member 26 is unwound.

Next, the configuration of the support shaft 41 will be described in detail.
The support shaft 41 includes a shaft portion 42 disposed in the shaft hole 27 when the roll-shaped medium 21 is supported, a flange portion 43 provided at the proximal end of the shaft portion 42, and a shaft of the shaft portion 42 together with the flange portion 43. And a plurality of projecting portions 45 that can project from the shaft portion 42 in a direction intersecting the axial direction by rotation of the handle 44. The roll-shaped medium 21 is aligned closer to the base end so that the first end is in contact with the flange portion 43 when the support shaft 41 is inserted.

The outer diameter of the shaft portion 42 is smaller than the inner diameter of the core material 26 of the roll-shaped medium 21, and the protruding amount of the protruding portion 45 is an amount corresponding to the difference between the outer diameter of the shaft portion 42 and the inner diameter of the core material 26. is there. That is, the shaft part 4
2 has an outer diameter smaller than the inner diameter of the core material 26 so as to be inserted into the roll-shaped medium 21, but after being inserted into the roll-shaped medium 21, the protrusion 45 is protruded from the shaft portion 42 and the core is formed. Material 26
Pressure contact. Thereby, the relative movement with respect to the axial part 42 of the roll-shaped medium 21 is controlled,
The roll-shaped medium 21 can rotate integrally with the support shaft 41.

As shown in FIG. 3, the protrusions 45 (45 </ b> A, 45 </ b> B, 45 </ b> C, 45 </ b> D) are arranged at a predetermined interval in the axial direction of the shaft part 42. For example, the projecting portion 45 </ b> A is disposed at the proximal end portion near the flange portion 43 in the axial direction of the shaft portion 42, and the projecting portion 45 </ b> D is disposed at the distal end portion of the shaft portion 42. The protrusion 45B is arranged near the center in the axial direction of the shaft part 42 (a position slightly closer to the base end than the center), and the protrusion 45C is located between the protrusion 45B and the protrusion 45D in the axial direction of the shaft part 42. It is between and is located at a position closer to the protrusion 45D than the protrusion 45B.

As shown in FIG. 4, in the support shaft 41, the shaft portion 42 has a cylindrical shape, and the projecting portions 45 (45 </ b> A, 45 </ b> B, 45 </ b> C, 45 </ b> D) aligned in the axial direction extend along the circumferential direction of the shaft portion 42. A plurality (three in this embodiment) are provided. Although the number of the protrusions 45 arranged in the circumferential direction can be changed, these protrusions 45 are directions that intersect the axial direction through the protrusion holes 46 formed in the shaft part 42 and are different from each other. Protrusively.

As shown in FIG. 5, the protruding portion 45 is cantilevered by an elastically deformable elastic portion 42 a joined to the inner peripheral surface of the shaft portion 42. Further, the support shaft 41 has a cylindrical moving body 47 accommodated in the shaft portion 42 so as to be coaxial with the shaft portion 42.

The handle 44 has an engaging protrusion 44 a that passes through the flange portion 43 and is inserted into the shaft portion 42. The engagement protrusion 44 a has an outer diameter smaller than the inner diameter of the moving body 47, and the tip (right end in FIG. 5) is inserted into the moving body 47. Further, in the handle 44, a male screw portion 44b extending in the axial direction (rightward in FIG. 5) in the moving body 47 protrudes from the tip of the engaging protrusion 44a.

The moving body 47 is provided with a female thread portion 48 that protrudes to the inner peripheral side and is screwed with the male screw portion 44b. When the handle 44 is turned, the moving body 47 is axially moved together with the female screw portion 48 that is screwed with the male screw portion 44b. Moving. The handle 44 can be rotated in a state where the support shaft 41 is held by the holding portion 22. Further, on the outer peripheral side of the moving body 47, a pressing protrusion 49 is provided at a position corresponding to the protruding portion 45 so as to press the protruding portion 45 as the moving body 47 moves in the axial direction.

Then, when the pressing protrusion 49 presses the protruding portion 45 as the moving body 47 moves in the axial direction (leftward in FIG. 3) from the position shown in FIG. 5, as shown in FIG. 42 a is elastically deformed and the projecting portion 45 projects outside the shaft portion 42 through the projecting hole 46. That is, the support shaft 4
One moving body 47 moves in the axial direction by the rotation of the handle 44, and the protrusion 45 is pressed by the moving body 47 moving in the axial direction and displaced in a direction intersecting the axial direction.

Next, an operation for attaching the roll-shaped medium 21 to the printing apparatus 11 will be described.
As shown in FIG. 2, when the roll-shaped medium 21 is attached to the printing apparatus 11, first, the shaft portion 42 of the support shaft 41 is inserted into the shaft hole 27 of the core material 26 of the roll-shaped medium 21. And the support shaft 4
After temporarily placing the roll-shaped medium 21 passed through 1 on the mounting portion 24, the support shaft 41 is lifted together with the roll-shaped medium 21, the holding portion 22 is moved, and both ends of the support shaft 41 are sandwiched between the bearing portions 29. The roll-shaped medium 21 is attached to the holding unit 22 via the support shaft 41.

Next, the first end of the roll-shaped medium 21 is brought closer to the base end side of the support shaft 41 so as to contact the flange portion 43 of the support shaft 41 sandwiched between the bearing portions 29. Subsequently, in this state, the handle 44 is turned to cause the protruding portion 45 to protrude and press-contact with the core member 26, thereby restricting relative movement of the roll-shaped medium 21 with respect to the shaft portion 42. Thereafter, the leading end of the medium M is unwound from the roll-shaped medium 21 and the support unit 1
4 is inserted into the housing 12 and the medium M is set on the transport path on the support 14.

Next, the operation of the transport device 10 and the printing device 11 configured as described above will be described.
As shown in FIGS. 7 and 8, a region where the first end (the left end in FIGS. 7 and 8) of the roll-shaped medium 21 is disposed in the shaft portion 42 of the support shaft 41 held at both ends by the holding portion 22. Is the proximal region S1, the region where the second end of the roll-shaped medium 21 is disposed is the distal region S3, and the region between the proximal region S1 and the distal region S3 is the intermediate region S2. In this case, the protrusion 45A is disposed in the base end region S1, the protrusion 45B is disposed in the intermediate region S2, and the protrusions 45C and 45D are disposed in the distal end region S3. That is, the support shaft 41 has a protruding portion 45 in each of the proximal end region S1, the intermediate region S2, and the distal end region S3 in the axial direction, and the number of the protruding portions 45 provided in the distal end region S3 is equal to the proximal end region S3. More than the number of protrusions 45 provided in the region S1 and the intermediate region S2.

Here, when both ends of the support shaft 41 are held by the holding unit 22 in a posture in which the axial direction is horizontal, the vicinity of the center in the axial direction together with the roll-shaped medium 21 due to the weight of the roll-shaped medium 21 is shown in FIGS. 8 may bend down as indicated by a two-dot chain line. Thus, the roll-shaped medium 2
When the medium M is fed while rotating in a state where 1 is bent, the tension of the medium M is changed between the both ends and the center, or the center is rotated while being swung in the circumferential direction like a jump rope. The feeding amount of the medium M may become uneven. If the feeding accuracy of the medium M is lowered in this way, the print quality may be lowered.

In that regard, as shown in FIG. 7, when the holding portion 22 holds both ends of the support shaft 41 inserted through the roll-shaped medium 21L having a long length in the axial direction, the protrusion 45A is the first of the roll-shaped medium 21L. Since the protrusion 45D supports the second end of the roll-shaped medium 21L and the protrusion 45B supports the center of the roll-shaped medium 21L, the bending of the roll-shaped medium 21L is suppressed.

Further, as shown in FIG. 8, when the holding part 22 holds both ends of the support shaft 41 inserted through the roll-shaped medium 21S having a short length in the axial direction, the protrusion 45A is the first end of the roll-shaped medium 21S. The protrusion 45C is the second end of the roll medium 21S, and the protrusion 45B is the roll medium 2.
Since each of the centers of 1S is supported, the bending of the roll-shaped medium 21S is suppressed.

As described above, when the holding unit 22 holds a plurality of types (two types in this embodiment) of roll media 21L and 21S having different lengths in the axial direction in a replaceable manner, the support shaft 41 has a predetermined axial direction. The plurality of protrusions 45 arranged at intervals support the core member 26 from the inside, so that bending due to the weight of the roll-shaped media 21L and 21S is suppressed. In addition, each protrusion part 45 arranged in an axial direction
Are provided in a plurality in the circumferential direction, so that the roll-shaped medium is formed by the protrusion 45 disposed relatively vertically above regardless of the orientation of the support shaft 41 when the support shaft 41 is held by the holding portion 22. 21 can be supported.

Further, the roll-shaped media 21L and 21S are positioned close to the base end of the support shaft 41, and the projecting portions 45C and 45D are projected at positions where the second ends of the roll-shaped media 21L and 21S are arranged, respectively. The roll-shaped media 21L and 21S having different lengths in the directions can be attached to the printing apparatus 11 by using one support shaft 41.

According to the above embodiment, the following effects can be obtained.
(1) The base region S in the axial direction with the support shaft 41 inserted into the shaft hole 27 of the core member 26
By projecting the projecting portions 45 provided in 1 and the tip region S3 in a direction crossing the axial direction, the core member 26 can be supported from the inside, and the bending deformation of the roll-shaped medium 21 can be suppressed.
In addition, since the number of the protrusions 45 arranged in the distal end region S3 is larger than that in the proximal end region S1, when the roll-shaped medium 21 having a different length in the axial direction is held, the roll-shaped medium 21 is supported on the support shaft 41. If the projecting portion 45 is projected in a state of being close to the base end side, the end portion on the distal end side of the roll-shaped medium 21 can be supported by any of the plurality of projecting portions 45 disposed in the distal end region S3. Therefore, by causing the plurality of protruding portions 45 arranged in the axial direction to protrude, it is possible to suppress the bending deformation of the plurality of types of roll-shaped media 21 having different lengths in the axial direction. Moreover, the fall of printing accuracy can be suppressed by suppressing the bending of the roll-shaped medium 21 by the effect | action of a conveying apparatus.

(2) By projecting the projecting portion 45 provided in the intermediate region S2 of the support shaft 41, it is possible to suppress bending deformation near the center due to the weight of the roll-shaped medium 21 when the axial direction is horizontal. . Further, when positioning the roll-shaped medium 21 having different lengths in the axial direction toward the proximal end side of the support shaft 41, the central portion of the roll-shaped medium 21 may be a roll even if the length of the roll-shaped medium 21 is different. The positional deviation is smaller than that of the tip of the medium 21. Therefore, even if the number of protrusions 45 provided in the base region S1 and the intermediate region S2 is smaller than that in the tip region S3, the roll-shaped medium 21L, the axial length of which differs depending on the protrusion 45B in the intermediate region S2,
The central part of 21S can be supported. And by supporting the center part of the roll-shaped medium 21 in which the length in an axial direction differs by the common protrusion part 45, the increase in the number of the protrusion parts 45 provided in the support shaft 41 is suppressed, and the structure of the support shaft 41 is comprised. It can be simplified.

(3) Since the handle 44 for projecting the projecting portion 45 by rotation is at the end of the support shaft 41 in the axial direction, the handle 44 can be rotated even when the support shaft 41 is inserted into the shaft hole 27 of the core member 26. It can be done easily.

(4) Since the protruding portion 45 can be protruded in a state where the support shaft 41 is attached to the holding portion 22 and the roll-shaped medium 21 is in a posture in which bending occurs, the roll-shaped medium 2 is allowed to protrude by the protruding portion 45.
The rotation operation of the handle 44 can be performed while confirming whether or not the bending of 1 is corrected.

In addition, you may change the said embodiment like the example of a change shown below. Moreover, the said embodiment and the following modified example can be combined arbitrarily.
In the proximal end region S1 and the distal end region S3, the position of the protrusion 45 in the axial direction may be shifted toward the center. In this case, as a result of the pair of protrusions 45 arranged in both the base region S1 and the tip region S3 being in pressure contact with the core member 26 of the roll-shaped medium 21, the roll-shaped medium 21 is bent by two protrusions. It occurs in the part between the parts 45.

If it does so, since the length in the axial direction of the part which generate | occur | produces bending becomes short rather than the whole roll-shaped medium 21, the bending of the roll-shaped medium 21 is suppressed. Therefore, in this case, the region where the first end of the roll-shaped medium 21 is disposed is the base region S1, and the region where the second end of the roll-shaped medium 21 is disposed is the distal region S3, and the intermediate region S2 and the intermediate region S2 Projection 45 disposed in region S2
B may not be provided.

In this case, a plurality of protrusions 45 having different positions in the axial direction are arranged in the tip region S3 so as to correspond to the roll-shaped medium 21 having different lengths. At this time, the support shaft 41 has protrusions 45 in both the proximal region S1 and the distal region S3 in the axial direction, and the number of the protrusions 45 provided in the distal region S3 is equal to the proximal region S1. More than the number of protrusions 45 provided. In this case, the axial lengths of the proximal region S1 and the distal region S3 may not be equal, and the distal region S3 may be longer than the proximal region S1.

-Three or more protrusions 45 arranged in the axial direction may be provided in the tip region S3, and the support shaft 41 may correspond to three or more types of roll-shaped media 21 having different lengths.
The lengths in the axial direction of the proximal region S1, the intermediate region S2, and the distal region S3 may not be equal.

-The number of the protrusion parts 45 arrange | positioned in intermediate | middle area | region S2 may be equal to the number of the protrusion parts 45 arrange | positioned in base end area | region S1.
In addition to the front end region S3, a protrusion 45 that supports the second end of the roll-shaped medium 21 may be disposed in the intermediate region S2. For example, when the difference in length between the three or more types of roll-shaped media 21 to which the support shaft 41 corresponds is large, the shortest roll-shaped media 21 is located near the protrusion 45B that supports the center of the longest roll-shaped media 21L. The second end may be arranged. In such a case,
You may arrange | position the protrusion part 45B which supports the center of the longest roll-shaped medium 21L, and the protrusion part 45 which supports the 2nd end of the shortest roll-shaped medium 21 in intermediate | middle area | region S2. In this case, the protrusion 45 that supports the center of the shortest roll-shaped medium 21 may not be provided.

The operation part for projecting the projecting part 45 on the support shaft 41 is not limited to the handle 44,
For example, the protruding portion 45 may be protruded by moving a lever that engages the moving body 47 in the axial direction or by pushing and pulling the moving body 47 protruding from the shaft portion 42 on the distal end side. Alternatively, a motor (drive source) that rotates the male screw portion 44b may be provided, and the moving body 47 may be moved by driving the motor.

The protruding portion 45 of the support shaft 41 inserted through the rolled medium 21 is protruded to roll the rolled medium 21.
The support shaft 41 may be attached to the holding portion 22 after restricting relative movement of the support shaft 41 to the holding portion 22. In this case, the handle 44 may not be able to be rotated while the support shaft 41 is held by the holding unit 22.

A lock mechanism for restricting the movement of the moving body 47 may be provided in a state where the protrusion 45 is protruded to restrict the movement of the roll-shaped medium 21. According to this configuration, when the roll-shaped medium 21 rotates while being held by the holding portion 22, the handle 44 rotates unintentionally and the protruding portion 45.
It is suppressed that the contact pressure to the core material 26 decreases.

The support shaft 41 of the above embodiment is also applied to the roll-shaped medium 31 on which the printed medium M is wound.
It may be supported by the holding part 32 via According to this configuration, the roll-shaped medium 3
It is possible to suppress deformation of the printed medium M due to 1 being bent by its own weight.

The printing unit 15 may be changed to a so-called full line type printing apparatus that does not include the carriage 17 but includes a long and fixed print head corresponding to the entire width of the medium M. In this case, the print head may be arranged such that a plurality of unit head portions in which nozzles are formed are arranged in parallel so that the print range extends over the entire width of the medium M, or the medium M is formed on a single long head. The printing range may extend over the entire width of the medium M by arranging a large number of nozzles over the entire width.

Recording materials used for printing include fluids other than ink (liquids, liquids in which particles of functional materials are dispersed or mixed, liquids such as gels, and solids that can be jetted as fluids. ). For example, recording is performed by ejecting a liquid material in which a material such as an electrode material or a color material (pixel material) used for manufacturing a liquid crystal display, an EL (electroluminescence) display, and a surface emitting display is dispersed or dissolved. It may be configured.

Further, the printing apparatus is a fluid ejecting apparatus that ejects a fluid such as a gel (for example, a physical gel),
It may be a powder injection device (for example, a toner jet recording device) that injects a solid such as toner (powder particles) as an example. In the present specification, the term “fluid” is a concept that does not include a fluid consisting only of gas. Examples of the fluid include liquids (inorganic solvents, organic solvents, solutions,
Liquid resin, liquid metal (including metal melt), etc., liquid, fluid, and powder (including particles and powder).

The printing apparatus 11 is not limited to a printer that performs recording by ejecting a fluid such as ink, and may be a non-impact printer such as a laser printer, an LED printer, a thermal transfer printer (including a sublimation printer), or a dot impact. An impact printer such as a printer may be used.

The medium is not limited to paper, but may be a fabric used for a plastic film or a textile printing apparatus. Further, the length of the medium in the axial direction is not necessarily the same as that of the core material 26,
For example, a roll medium may be formed by winding a chain, a tape, a ribbon, a string, a thread, or the like that is shorter in the axial direction than the core material 26 while shifting the position in the axial direction.

DESCRIPTION OF SYMBOLS 10 ... Conveyance apparatus, 11 ... Printing apparatus, 15 ... Printing part, 21, 21L, 21S ... Roll-shaped medium, 22, 22A, 22B ... Holding part, 26 ... Core material, 27 ... Shaft hole, 41 ... Support shaft, 45 , 4
5A, 45B, 45C, 45D ... protrusion, 44 ... handle, M ... medium, S1 ... proximal region,
S2 ... intermediate region, S3 ... tip region.

Claims (5)

A support shaft inserted into the shaft hole of the core material of the roll-shaped medium;
A holding portion for rotatably holding both ends of the support shaft;
With
In the axial direction, the support shaft intersects the axial direction in both the proximal end region where the first end of the roll-shaped medium is disposed and the distal end region where the second end of the roll-shaped medium is disposed. The conveying device has a protruding portion that can protrude in a direction in which the protruding portion is provided, and the number of the protruding portions provided in the distal end region is larger than the number of the protruding portions provided in the proximal end region. The support shaft has the protruding portion in an intermediate region between the proximal end region and the distal end region in the axial direction, and the number of the protruding portions provided in the distal end region includes the proximal end region and the intermediate portion. The transport device according to claim 1, wherein the number of the protrusions provided in the region is larger. The conveying device according to claim 1, wherein the support shaft has a handle that causes the protruding portion to protrude by rotation at an end portion in the axial direction. The transport apparatus according to claim 3, wherein the handle is rotatable in a state where the support shaft is held by the holding portion. The conveying apparatus as described in any one of Claims 1-4,
A printing unit that performs printing on a medium conveyed by the conveying device;
A printing apparatus comprising: