JP2011136506A - Printer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a delivering roller part which can appropriately move by making the delivering roller part movable and preventing inconvenience caused by movement of the delivering roller part. <P>SOLUTION: A printer includes: a paper feeding part 1 for holding a recording medium Pa; and the delivering roller part 8 for delivering the recording medium held in the paper feeding part to a head part. The delivering roller part is constituted so that it pinches the recording medium in the paper feeding part and can move from a specified position po1 of an origin of movement to a specified position po2 of a destination of movement. When the delivering roller part is at the specified position of the origin of movement, a detour means 9 of the recording medium between the delivering roller part and the paper feeding part is provided. When a delivering distance for stretching the recording medium from the delivering roller part at the specified position of the origin of movement to the paper feeding part is R1, and accompanied with movement of the delivering roller part 8, a change in the delivering distance of the recording medium caused by winding on the paper feeding part is a delivery changing distance R3, and a delivering distance for stretching the recording medium from the delivering roller part at the specified position of the destination of movement to the paper feeding part is R2, the detour distance α1 is set so as to be (R1-R3)≈R2. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a printer including a feeding roller unit for feeding a wound printing medium held by a supply unit, and more particularly to a new printer configured to appropriately move the feeding roller unit.

  As an example of a printer, a thermal printer includes a paper feeding unit that holds a recording medium such as a sheet that is a printing medium in a state where it can be supplied to a head unit that performs printing, and a recording that is held by the paper feeding unit. Conveying means for conveying the medium to the head unit, supplying the recording medium to the head unit through the conveying unit, and transferring the dye or pigment to the recording medium through heating of the head unit, or detecting heat This is a printing apparatus that prints on a recording medium by heating a recording medium such as thermal paper whose color changes by a head unit.

  As a conventional thermal printer, for example, in Patent Document 1, a paper feeding unit such as a paper cassette that holds a recording medium such as a rolled paper roll, and a recording medium set in the paper feeding unit is transported toward a head unit. There is disclosed a printer including a delivery roller unit that feeds out a path. In a printer using such a wound recording medium, when performing maintenance such as replenishment of the recording medium to the paper feeding unit, the recording medium is set in the paper feeding unit, and then the recording held in the paper feeding unit It is necessary to perform preparation work for setting the leading end of the medium to the delivery roller unit.

JP 2001-88385 A

  By the way, for the purpose of improving the maintainability, for example, by simplifying the preparation work for attaching / detaching the recording medium to / from the delivery roller unit, the delivery roller unit is configured to be movable between a plurality of predetermined positions. Although this is considered as an effective means, a configuration in which the feed roller portion is movable is not disclosed in other documents as well as the above-mentioned Patent Document 1.

  Therefore, the feed roller unit is configured to be movable, and the feed roller unit is moved in a state where the wound recording medium is held by the paper feed unit so as not to rotate. In some cases, the medium may fall off, or after the movement, the recording medium may relax between the feeding roller unit and the paper feeding unit and may contact a peripheral mechanism or the like to cause a conveyance failure.

  Specifically, as shown in FIG. 10A, when the feeding roller unit 1008 is moved from the movement source predetermined position po1 to the movement destination predetermined position po2 while the recording medium Pa is held between a pair of rollers 1081 and 1081. The feeding distance necessary to make the recording medium Pa stretched from the feeding roller unit 1008 at the movement source predetermined position po1 to the paper feeding unit 1001 is a first distance R1, and as the feeding roller unit 1008 moves. A change in the feeding distance of the recording medium Pa caused by being wound around the paper feeding unit 1001 is set as a feeding change distance R3, and the recording medium Pa is stretched from the feeding roller unit 1008 at the movement destination predetermined position po2 to the paper feeding unit 1001. When the feeding distance necessary for this is the second distance R2, the result of subtracting the feeding change distance R3 to the first distance R1 is If shorter than the second distance R2, there is a case where the recording medium Pa is falls off from the feeding roller unit 1008.

  On the contrary, as shown in FIG. 10B, when the result of subtracting the feeding change distance R6 from the first distance R4 is longer than the second distance R5, the gap between the feeding roller unit 1008 and the paper feeding unit 1001 is obtained. As a result, the recording medium Pa may be relaxed.

  In the above example, the feeding distance is changed by winding the recording medium Pa around the paper feeding unit 1001 in accordance with the movement of the feeding roller unit 1008, but in addition to this, the feeding roller unit 1008 is moved. Along with this, the feeding distance may change due to the recording medium Pa being peeled off from the paper feeding unit 1001. In the above description, the paper supply unit that holds a recording medium such as paper is described as an example. However, the present invention is not limited to this, and the same applies to a supply unit that holds a recording medium such as paper or a printing medium including an ink ribbon. I can say that. In addition, the above-described problems do not always occur when trying to improve maintainability. For example, the printing medium held in the supply unit such as feeding out the printing medium at a plurality of predetermined positions may be used. The same can happen when trying to realize a new supply.

  The present invention has been made on the basis of such new knowledge, and its purpose is to prevent the occurrence of problems caused by the movement of the sending roller portion when the sending roller portion is configured to be movable. It is an object of the present invention to provide a printer that contributes to the realization of a feed roller unit that can be moved appropriately, and consequently, the improvement of maintainability and the new supply of a printing medium held in the supply unit.

  In order to achieve this object, the present invention takes the following measures.

  That is, the printer of the present invention includes a supply unit that holds the wound printing medium, and a feed roller unit that feeds one end side of the printing medium held by the supply unit to a head unit that performs printing. The feed roller unit is configured to be movable from a predetermined position of the movement source to a predetermined position of the movement destination while sandwiching the printing medium held by the supply unit, and the feed roller unit is configured to move the movement source A detour means for detouring the printing medium from the feed roller section to the supply section when at least one of the predetermined position and the predetermined position of the movement destination is provided, and the feed roller section at the predetermined position of the movement source The feeding distance necessary to make the printing medium stretched from the supply part to the supply part is the first distance, and is wound around the supply part or detached from the supply part as the feed roller part moves. A change in the feeding distance of the printing medium is defined as a feeding change distance, and the feeding distance necessary to make the printing medium stretched from the feeding roller unit at the predetermined position to the supply unit is the second distance. In this case, the distance of the printing medium to be bypassed by the bypass means is set so that the result of adding or subtracting the feeding change distance to the first distance substantially matches the second distance. It is characterized by.

  The printing medium is supplied to a head unit that performs printing and used for printing. Examples of the printing medium include a recording medium such as roll paper, and an ink ribbon. The “substantially coincidence” means not only a complete coincidence but also a range in which the following effects can be substantially obtained. The feeding distance refers to the length of the part of the printing medium held in the supply unit that is peeled off from the wound state.

  According to this configuration, when the feeding roller unit is at least one of the movement source predetermined position and the movement destination predetermined position, the printing medium from the feeding roller unit to the supply unit is detoured by the detouring means, and the first distance is set. Since the distance of the print medium to be detoured by the detour means is set so that the result of adding or subtracting the feeding change distance substantially matches the second distance, the feeding change distance is added to the first distance or It is possible to prevent the occurrence of problems caused by the difference between the reduced result and the second distance, and it is possible to provide a feed roller unit that can move appropriately. In addition, it is possible to contribute to the realization of the improvement of maintainability and the new supply of the printing medium held in the supply unit by configuring the feed roller unit to be appropriately movable.

  In order to effectively prevent a problem that the printing medium drops off from the feed roller unit as the feed roller unit moves, the result of adding or subtracting the feeding change distance to the first distance is the second distance. The bypass unit preferably bypasses the printing medium at least when the delivery roller unit is at the predetermined position of the movement source.

  In order to improve maintainability when the printing medium is attached to and detached from the sending roller unit, in addition to the above configuration, the sending roller unit is used for printing with respect to the sending roller unit when it is in the predetermined position of the movement source. It is preferable that the medium can be attached and detached.

  In order to appropriately feed the printing medium to the head unit by the feeding roller unit, the feeding roller unit feeds the printing medium to the head unit when the feeding roller unit is at the predetermined position of the movement destination. The bypass means bypasses the printing medium from the delivery roller unit to the supply unit at the movement source predetermined position and bypasses the printing medium as the delivery roller unit moves to the movement destination predetermined position. Is preferably reduced to zero.

  In order to prevent the printing medium from being loosened after the movement of the feed roller unit and causing problems such as conveyance failure, the result of adding or subtracting the feeding change distance to the first distance is the second distance. It is preferable that the bypass means bypass the printing medium when the delivery roller portion is at least at the predetermined position of the movement destination.

  In order to realize a new supply of the printing medium held in the supply unit, the supply roller has a plurality of conveyance paths for conveying the printing medium supplied from the supply unit to the head unit, and the delivery roller The transport unit may be configured such that a transport path that is a feeding destination of the printing medium when it is at the predetermined position of the movement source is different from a transport path that is a feeding destination of the printing medium when the position is at the predetermined position of the movement destination. It is preferable to be configured.

  Since the present invention has the above-described configuration, the print medium is detoured by the detouring means when at least one of the predetermined position of the movement source and the predetermined position of the movement destination is detoured, and the feeding medium is changed to the first distance. Since the result obtained by adding or subtracting the distance is substantially the same as the second distance, it is possible to prevent the occurrence of problems caused by the mismatch between the two and to provide a feed roller unit that can be moved appropriately. It becomes. In addition, it is possible to contribute to the realization of the improvement of maintainability and the new supply of the printing medium held in the supply unit by configuring the feed roller unit to be appropriately movable.

1 is a configuration diagram schematically showing a thermal printer according to an embodiment of the present invention. FIG. 3 is a perspective view schematically showing reversing means for rotating a paper feed unit that holds a recording medium. FIG. 3 is a configuration diagram schematically illustrating a configuration in which a recording medium is communicated between a paper feeding unit and a branching unit. FIG. 3 is a configuration diagram schematically illustrating a configuration in which a recording medium is communicated between a paper feeding unit and a branching unit. FIG. 3 is a partial sectional view taken along line AA in FIG. The figure corresponding to FIG. 5 which shows the description regarding a movement of a sending roller part typically. The figure corresponding to FIG. 6 which shows typically the thermal printer which concerns on other embodiment of this invention. The figure corresponding to FIG. 6 which shows typically the thermal printer which concerns on other embodiment of this invention. The figure corresponding to FIG. 6 which shows typically the thermal printer which concerns on embodiment other than the above of this invention. Explanatory drawing regarding the malfunction of the improvement plan which made the sending roller part movable.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In the present embodiment, the printing medium is described as a recording medium such as roll paper, and the supply unit is described as a paper feeding unit that holds the recording medium.

  As shown in FIG. 1, the thermal printer according to the present embodiment includes a paper feed unit 1 that holds a recording medium Pa such as a wound roll paper, and a plurality of head units 2 and 3 that perform printing on the recording medium Pa. The main path Li0 that transports the recording medium Pa supplied from the paper feeding section 1, the delivery roller section 8 that feeds out the recording medium Pa held in the paper feeding section 1 with respect to the main path Li0, and the main path Li0. Conveying the recording medium Pa in the branch paths Li1 and Li2 while holding the recording medium Pa between the branch paths Li1 and Li2 connected via the section 63 and having the head sections 2 and 3 respectively and the pair of rollers 61 and 62 A recording medium having a roller unit 6 and a control unit 5 that controls the conveyance of the recording medium Pa and the printing control of the head units 2 and 3, and is held by the paper feeding unit 1 through the sending roller unit 8 and the conveyance roller unit 6. Pa to head 2 and 3 Printing is performed on the recording medium Pa while feeding.

  As shown in FIG. 1, the paper feeding unit 1 rotatably holds a recording medium Pa wound in a roll shape, and the recording medium Pa is centered on a roll axis C <b> 1 by a power unit such as a motor (not shown). The recording medium Pa is fed out and rewound by rotating forward and backward.

  The delivery roller unit 8 includes a pair of rollers 81 and 81, and supplies the recording medium Pa held by the sheet feeding unit 1 toward the head units 2 and 3 while sandwiching one end of the recording medium Pa between the pair of rollers 81 and 81. To do.

  As shown in FIGS. 1, 3, and 4, the conveyance roller unit 6 is disposed downstream of the sheet feeding unit 1 along the branch paths Li <b> 1 and Li <b> 2 and feeds a recording medium Pa held by the sheet feeding unit 1. The recording medium Pa is conveyed by rotating the feed roller 61 through a power unit such as a motor (not shown) while being sandwiched between the roller 61 and the pinch roller 62. Note that upstream means the paper feed unit 1 side in the transport path in which the recording medium Pa is transported, and downstream means the direction away from the paper feed unit 1 in the transport path. In the present embodiment, examples of the conveyance path include a trunk path Li0, branch paths Li1, and Li2.

  As shown in FIG. 1, the head units 2 and 3 perform printing on the recording medium Pa supplied from the sheet feeding unit 1 via the trunk path Li0 and the branch path Li1 or the branch path Li2. Specifically, thermal heads 21 and 31 are provided downstream of the conveying roller unit 6 and heating resistors are arranged, and printing is performed by transferring the ink to the recording medium Pa by heating the thermal heads 21 and 31.

  The control unit 5 is configured by a normal microcomputer unit having a CPU, a memory, and an interface like a known thermal printer, and necessary programs such as a conveyance control routine and a print control routine are written in the memory. The CPU calls and executes necessary programs as appropriate, thereby realizing the intended transport operation and printing operation in cooperation with peripheral hardware resources.

  In the present embodiment, the following configuration is further added to the above configuration.

  That is, in order to realize double-sided printing by each of the head units 2 and 3, as shown in FIG. 1, the paper feed unit 1 can be rotated around the rotation axis Cn, and the paper feed unit 1 is rotated by the first rotation. The recording medium Pa can be supplied while being stopped at the position ro1, and the sheet feeding unit 1 is stopped at the second rotation position ro2 rotated 180 degrees from the first rotation position ro1 (see FIG. 4). ), The reversing means 4 for reversing the front and back of the recording medium Pa facing the head portions 2 and 3 is provided. The rotation of the paper feeding unit 1 by the reversing unit 4 is controlled by the control unit 5. The reversing unit 4 is configured to be able to stop the sheet feeding unit 1 at a third rotation position Ro3 suitable for maintenance on the sheet feeding unit 1 such as attaching and detaching the recording medium Pa to the sheet feeding unit 1 (FIG. 5).

  Specifically, as illustrated in FIG. 2, the reversing unit 4 includes a paper feed unit 1 that holds the recording medium Pa so as to be able to be supplied, and a support unit that supports the paper feed unit 1 so as to be rotatable about the rotation axis Cn. 41, and is configured to rotate the paper feed unit 1 to stop at a predetermined rotational position.

  As shown in FIG. 2, the paper feed unit 1 is detachably supported on both sides in the width direction of the recording medium Pa so that the recording medium Pa wound in a roll shape can be rotated about the roll axis C1. Holding part 11, a plate-like turntable part 13 provided with the holding part 11 on the upper surface 13a, and a part of the holding part 11 provided on the upper surface 13a of the turntable part 13 and the recording held by the holding part 11. A fixed cover portion 12 that surrounds a part of the medium Pa and opens the other portion to the outside, and an interior and a fixed cover that are surrounded by the fixed cover portion 12 via a loading / unloading space SP1 including an opening space of the fixed cover portion 12 The recording medium Pa is detachably held between the recording medium Pa and the outside separated from the unit 12. The support unit 41 that supports the paper feeding unit 1 supports the turntable unit 13 of the paper feeding unit 1 so as to be rotatable about the rotation axis Cn.

  By the way, since the sheet feeding unit 1 is configured to rotate by the reversing means 4 as described above, the connection between the main path Li0 for transporting the recording medium Pa supplied from the sheet feeding unit 1 and the sheet feeding unit 1 is performed. The part needs to correspond to the rotation of the sheet feeding unit 1.

  For this purpose, as shown in FIGS. 3 and 4, the entrance of the trunk path Li <b> 0 is received by a guide mechanism 7 that receives the recording medium Pa that is sandwiched by the delivery roller unit 8 and has a free tip and guides it to the branching unit 63. It is configured. The guide mechanism 7 includes a first guide unit 71 that receives the recording medium Pa fed from the feed roller unit 8 and guides it to the branching unit 63 when the sheet feeding unit 1 is at the first rotation position ro1, and a sheet feeding unit. And a second guide portion 72 for receiving the recording medium Pa fed from the feed roller portion 8 and guiding it to the branch portion 63 when 1 is at the second rotational position ro2. The end portions of the first guide portion 71 and the second guide portion 72 on the sheet feeding portion side are formed so that the space between the guide surfaces is widened in a trumpet shape and smoothly receives the recording medium Pa with curled wrinkles. ing. Further, as shown in FIGS. 3 and 4, the branching unit 63 connected to the downstream side of the trunk road Li0 is rotated according to a switching command from the control unit 5 to rotate the recording medium Pa in the trunk road Li0. Is switched to one of the branch path Li1 and the branch path Li2.

  By the way, in the present embodiment, as described above, when the sheet feeding unit 1 is stopped at the third rotation position for maintenance and the recording medium Pa is attached to and detached from the sheet feeding unit 1, FIGS. As shown in a), the pair of rollers 81 and 81 constituting the delivery roller unit 8 is in the feeding position ku shown in FIG. 4A and provided at one end of one of the pair of rollers 81. The passive gear 81a and the gear 81b, which is a part of the mechanical part As that applies a driving force to the delivery roller unit 8, are engaged with each other so that the delivery roller unit 8 and the mechanical part As are associated with each other. This space is occupied by the mechanical component As, and it is difficult to perform the operation of attaching / detaching the recording medium Pa to / from the rollers 81. Further, in this case, the feeding roller unit 8 is in the loading / unloading space SP1, and the operation of attaching and detaching the recording medium Pa to / from the paper feeding unit 1 is hindered by the feeding roller unit 8.

  Therefore, in the present embodiment, the delivery roller unit 8 is configured as described below in order to solve such a problem.

  That is, as shown in FIG. 2, the feeding roller unit 8 is provided with a pair of rollers 81 and 81 for feeding out the recording medium while sandwiching the recording medium, and an opening / closing axis C2 provided on both ends of the pair of rollers 81 and 81. A feed roller support portion 83 that performs an opening / closing operation by turning around the center, and a contact / separation mechanism 82 that enables the pair of rollers 81 and 81 to be relatively contacted / separated. The contact / separation mechanism 82 includes a balance portion 82a provided on the feed roller support portion 83 so as to be rotatable about an axis C3 parallel to the axis of the roller 81, and an urging means 82b using a tension spring. Yes. One of the pair of rollers 81, 81 is rotatably supported by the feed roller support portion 83, and the other roller is located at a portion of the balance portion 82a displaced from the axis C3. Is provided. The urging means 82 b urges the roller 81 provided on the balance portion 82 a toward the other roller 81. Of course, the biasing means 82b is not limited to the tension spring as long as it biases in the direction in which the pair of rollers 81 and 81 approach each other. Further, the contact / separation mechanism 82 includes an eccentric cam 82c that contacts the balance 82a, a contact / separation mechanism gear 82e (see FIG. 2) that obtains power from a power unit such as a motor (not shown), and the eccentric cam 82c and contact / separation mechanism gear. It has a connecting shaft 82d for connecting to 82e, and is configured to be able to switch between a pair of rollers 81 between a pressure contact state and a separated state by rotating an eccentric cam 82c.

  In the above configuration, as shown in FIG. 5B, the delivery roller support portion 83 is rotated about the opening / closing axis C2, and the pair of rollers 81 and 81 constituting the delivery roller portion 8 are moved to a predetermined maintenance position mt. , The meshing between the passive gear 81a provided on the roller 81 and the gear 81b which is a part of the mechanism part As is lost, and the association between the delivery roller part 8 and the mechanism part As is broken, and the delivery roller part 8 The surrounding space is opened, and the opened space can be used when the recording medium Pa is attached to and detached from the rollers 81 and 81. Further, in this case, the sending roller unit 8 is retracted from the loading / unloading space SP1 and is outside the loading / unloading space SP1, and the loading / unloading space SP1 necessary for attaching / detaching the recording medium Pa to / from the sheet feeding unit 1 is secured without being occupied. The

  However, in the present embodiment, as described above, the feed roller unit 8 is configured to be movable between the maintenance position mt and the feeding position ku, as shown in FIG. In moving the delivery roller unit 8 from the maintenance position mt, which is the movement source predetermined position po1, to the feeding position ku, which is the movement destination predetermined position po2, with the recording medium Pa being sandwiched, the delivery roller unit at the movement source predetermined position po1. The shortest feeding distance necessary for setting the recording medium Pa from 8 to the sheet feeding unit 1 is a first distance R1, and the recording medium wound around the sheet feeding unit 1 as the feed roller unit 8 moves. Necessary for setting the recording medium Pa from the feed roller unit 8 to the paper feed unit 1 at the predetermined movement destination position po2 as the feed change distance R3, where the change in the feed distance of Pa is the feed change distance R3. When the shortest feeding distance is the second distance R2, when the result (R1-R3) obtained by subtracting the feeding change distance R3 from the first distance R1 is shorter than the second distance R2, the feeding roller unit 8 May cause the recording medium Pa to fall off. In addition, the operator has to set the recording medium Pa with a surplus that is sufficient to prevent the drop-out based on empirical rules and assumptions, and this causes a problem that the maintainability is significantly impaired.

  Therefore, in the present embodiment, the following configuration is added to solve such a problem.

  That is, as shown in FIG. 6B, there is provided a detour means 9 for detouring the recording medium Pa from the feed roller unit 8 to the paper feed unit 1 at the movement source predetermined position po1 by a distance α1. The detour means 9 has a rod shape that is arranged in parallel with the axis C1 and engages with the recording medium Pa, and the operator simply arranges the recording medium Pa from the feed roller section 8 to the paper feed section 1 via the detour means 9. In this case, the length of the printing medium peeled from the winding state in the recording medium Pa held by the paper feeding unit 1 is set to R1 + α1. The distance α1 at which the bypass unit 9 bypasses the recording medium Pa is set so that the relationship R1 + α1−R3 = R2 is established. Further, the detour means 9 is disposed at a position displaced from the shortest path E when the recording medium Pa is disposed in a stretched state from the feed roller unit 8 at the movement source predetermined position po1 to the sheet feeding unit 1, and The recording medium Pa is disposed at a position separated from the path F when the recording medium Pa is disposed in a stretched state from the delivery roller unit 8 to the sheet feeding unit 1 at the movement destination predetermined position po2.

  When the delivery roller unit 8 moves from the movement source predetermined position po1 to the movement destination predetermined position po2, the amount by which the detour means 9 and the recording medium Pa are released and the detour means 9 bypasses the recording medium Pa is determined. It becomes zero.

  In the present embodiment, the printing medium is the recording medium Pa and the supply unit that holds the printing medium is described as the paper feeding unit 1. However, the printing medium is supplied to the head unit that performs printing and printing is performed. As long as it is used for performing, it is not limited to this. For example, the printing medium includes a recording medium such as roll paper, an ink ribbon, and the like, and the supply unit includes a paper feeding unit 1 that holds the recording medium Pa, a ribbon supply unit that holds an ink ribbon, and the like.

  As described above, the printer according to this embodiment is a paper supply unit 1 that is a supply unit that holds the recording medium Pa that is a wound print medium, and a print medium that is held by the paper supply unit 1 that is a supply unit. One end side of the recording medium Pa is provided with a feeding roller unit 8 that feeds out to the head units 2 and 3 for printing, and the feeding roller unit 8 is a printing medium held in the paper feeding unit 1 as a supply unit. The recording medium Pa is configured to be movable from the movement source predetermined position po1 toward the movement destination predetermined position po2 while sandwiching the recording medium Pa, and when the feed roller unit 8 is at the movement source predetermined position po1, the feed roller unit 8 supplies the supply unit. A detour means 9 for detouring the recording medium Pa as a printing medium up to the paper section 1 is provided, and a recording medium as a printing medium from the feed roller section 8 at the movement source predetermined position po1 to the paper feeding section 1 as a supply section. Make Pa stretch The feeding distance necessary for this is the first distance R1, and the change in the feeding distance of the recording medium Pa as the printing medium caused by being wound around the paper feeding section 1 as the feeding section in accordance with the movement of the feeding roller section 8 changes the feeding distance. A distance R3 is set, and a feeding distance necessary to make the recording medium Pa as a printing medium stretched from the feed roller unit 8 at the movement destination predetermined position po2 to the paper feeding unit 1 as the supply unit is a second distance R2. In this case, the recording medium Pa, which is a printing medium that is detoured by the detouring unit 9 so that the result (R1-R3) obtained by subtracting the feeding change distance R3 from the first distance R1 substantially coincides with the second distance R2. A distance α1 is set.

  In this way, when the delivery roller unit 8 is at the movement source predetermined position po1, the recording medium Pa that is a printing medium from the delivery roller unit 8 to the paper feeding unit 1 that is the supply unit is bypassed by the bypass unit 9, and the first The distance α1 of the recording medium Pa, which is a printing medium to be detoured by the detour means 9, is set so that the result (R1-R3) obtained by subtracting the feeding change distance R3 from the distance R1 substantially coincides with the second distance R2. Therefore, it is possible to prevent the occurrence of problems caused by the difference between the result (R1-R3) obtained by subtracting the feeding change distance R3 from the first distance R1 and the second distance R2, and to appropriately move the feed roller unit. Can be provided. In addition, it is possible to contribute to the realization of the improvement of maintainability and the new supply of the printing medium held in the supply unit by configuring the feed roller unit to be appropriately movable.

  Furthermore, in this embodiment, since the result (R1-R3) obtained by subtracting the feeding change distance R3 from the first distance R1 is shorter than the second distance R2, the delivery roller unit 8 is moved from the movement source predetermined position po1 to the movement destination. When the recording medium Pa, which is a printing medium, drops off from the delivery roller unit 8 when the delivery roller unit 8 moves to the predetermined position po2, the detouring unit 9 detects that the delivery roller unit 8 is at the movement source predetermined position po1. Since the recording medium Pa, which is a printing medium, is bypassed, it is possible to effectively prevent the recording medium Pa, which is a printing medium, from dropping out from the sending roller unit 8 by giving an extra length to the recording medium Pa, which is a printing medium. It becomes. In this embodiment, the recording medium Pa is bypassed by the detour means 9 when the delivery roller unit 8 is at the movement source predetermined position po1, but the delivery roller unit 8 is moved to the movement source predetermined position po1 and the movement destination predetermined position. The recording medium Pa may be detoured by the detouring means when both are in po2.

  Furthermore, when the recording medium Pa, which is a printing medium, is attached to and detached from the sending roller unit 8 at the movement source predetermined position po1, the extent to which the operator can secure the extra length of the recording medium Pa is determined from the sending roller unit 8 to the recording medium. Although it is not known whether or not Pa can be prevented from falling off, in the present embodiment, the above-described configuration is applied to the recording medium Pa serving as a printing medium for the sending roller unit 8 when the sending roller unit 8 is at the movement source predetermined position po1. Since the present invention is applied to a detachable recording medium, an appropriate extra length of the recording medium Pa, which is a printing medium, is ensured only by diverting the recording medium Pa, which is a printing medium, to the bypass means 9, thereby improving maintainability. It becomes possible.

  In addition, in the present embodiment, the sending roller unit 8 feeds out the recording medium Pa as a printing medium to the head units 2 and 3 when the sending roller unit 8 is at the predetermined destination position po2. When the unit 8 is at the movement source predetermined position po1, the recording medium Pa as a printing medium from the sending roller unit 8 to the paper feeding unit 1 as the supply unit is detoured, and the sending roller unit 8 moves to the destination predetermined position po2. As a result, the amount of detouring the recording medium Pa, which is a printing medium, is set to zero, so that the detouring means 9 is used when the sending roller unit 8 feeds the recording medium Pa to the head units 2 and 3 at the movement destination predetermined position po2. Therefore, it is possible to realize appropriate conveyance without affecting the conveyance.

  As mentioned above, although embodiment of this invention was described based on drawing, it should be thought that a specific structure is not limited to these embodiment. The scope of the present invention is shown not only by the above description of the embodiments but also by the scope of claims for patent, and further includes all modifications within the meaning and scope equivalent to the scope of claims for patent.

  For example, in the present embodiment, the case where the recording medium Pa is wound around the paper feeding unit 1 as the sending roller unit 8 moves is described. However, the recording medium Pa is fed as the sending roller unit 8 moves. When the feeding distance of the recording medium changes due to peeling from the portion 1, the change in the feeding distance is defined as the feeding change distance, and the result of adding the feeding change distance to the first distance is substantially the second distance. What is necessary is just to set the distance of the recording medium detoured by a detour means so that it may correspond. When there is no change in the feeding distance of the recording medium Pa along with the movement of the feeding roller unit 8, the distance of the recording medium to be detoured by the detouring means is set so that the first distance and the second distance are substantially the same. That's fine.

  Furthermore, in the present embodiment, as shown in FIG. 6B, the delivery roller unit 8 feeds the recording medium Pa to the head units 2 and 3 when the transfer roller unit 8 is at the movement destination predetermined position po2, and detours. The means 9 bypasses the recording medium Pa from the sending roller unit 8 to the paper feeding unit 1 by the distance α1 when the sending roller unit 8 is at the movement source predetermined position po1, and the sending roller unit 8 is moved to the destination predetermined position po2. Although the amount of detouring the recording medium Pa as it moves is zero, as shown in FIG. 7, the detour unit 109 performs recording from the delivery roller unit 108 at the movement source predetermined position po1 to the sheet feeding unit 101. The medium Pa is configured to bypass the distance α3, and the recording medium Pa from the feeding roller unit 108 to the sheet feeding unit 101 at the predetermined destination position po2 is configured to bypass the distance α4 shorter than the distance α3. Te, the amount of bypassing the recording medium Pa in accordance with the movement of the feed roller 108 may be reduced. Even with this configuration, it is possible to reduce the influence of the detour unit 109 on the conveyance of the recording medium Pa and realize appropriate conveyance in the same manner as described above.

  Furthermore, as shown in FIG. 8, when the feeding roller unit 208 that holds the recording medium Pa between the pair of rollers 281 is moved from the movement source predetermined position po1 to the movement destination predetermined position po2, the recording medium Pa is relaxed. May end up. This is because the result (R4-R6) obtained by subtracting the feeding change distance R6 from the first distance R4 is longer than the second distance R5, and therefore, the delivery roller located at the destination predetermined position po2 by the detour means 209. The result of subtracting the distance α2 from the recording unit Pa to the sheet feeding unit 201 to establish the relationship R4−R6 = R5 + α2 and subtracting the feeding change distance R6 to the first distance R4 (R4−R6) For example, it may be configured to eliminate the difference from the second distance R5. If comprised in this way, it will become possible to prevent effectively that the printing medium is tensioned and the slack is eliminated to cause problems such as poor conveyance.

  In addition, as shown in FIG. 9, a plurality of conveyance paths for conveying the recording medium Pa supplied from the paper supply unit 301 to the head units 2 and 3 are provided, and the sending roller unit 308 has a movement source predetermined position po1. If the conveyance path that is the feeding destination of the recording medium Pa when the recording medium Pa is located and the conveyance path that is the feeding destination of the recording medium Pa when the recording medium Pa is at the movement destination predetermined position po2, the sheet feeding unit 301 is configured. It is possible to realize a new supply of the recording medium Pa held in the recording medium.

  In the present embodiment, the detour means 9 is formed in a rod shape, but the shape is not limited to this shape as long as the detour means 9 can be detoured by engaging with the recording medium Pa.

  In addition, in the present embodiment, the paper feeding unit 1 is rotated around the rotation axis Cn. However, the paper feeding unit 1 may be rotated around the y axis, the x axis, and the z axis that define an orthogonal coordinate system.

  Finally, the specific configuration of each part is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention.

1, 101, 201, 301... Supply unit (paper feed unit)
2, 3... Head portion 8, 108, 208, 308... Sending roller portion 9, 109, 209, 309 .. Detour means Pa .. Printing medium (recording medium)
po1 ... movement source predetermined position po2 ... movement destination predetermined positions R1, R4, R7 ... first distance R2, R5, R8 ... second distance R3, R6 ... feeding change distances α1, α2, α3, α4 ... by detour means The distance of the print media (recording media) to bypass

Claims (6)

A supply unit for holding the wound printing medium;
A feeding roller unit that feeds one end side of the printing medium held by the supply unit to a head unit that performs printing;
The delivery roller unit is configured to be movable from a predetermined position of movement source to a predetermined position of movement destination while sandwiching the printing medium held by the supply unit,
A detour means for detouring the printing medium from the feed roller unit to the supply unit when the feed roller unit is at least one of the movement source predetermined position and the movement destination predetermined position;
The feeding distance required to make the printing medium stretched from the feeding roller section at the predetermined position of the movement source to the feeding section is the first distance, and is wound around the feeding section as the feeding roller section moves. The change in the feeding distance of the printing medium due to peeling from the supply unit is defined as the feeding change distance, and the feeding required to make the printing medium stretched from the feeding roller unit at the predetermined position to the supply unit When the distance is the second distance, the print medium that is bypassed by the bypass means so that the result of adding or subtracting the feeding change distance to the first distance substantially matches the second distance. A printer characterized in that a distance is set. The result of adding or subtracting the feeding change distance to the first distance is shorter than the second distance,
The printer according to claim 1, wherein the bypass unit bypasses the printing medium when the delivery roller unit is at least at the predetermined position of the movement source.   The printer according to claim 2, wherein the sending roller unit is configured to allow the printing medium to be attached to and detached from the sending roller unit when the sending roller unit is at the predetermined position of the movement source. The delivery roller portion feeds a printing medium to the head portion when the destination roller is in a predetermined position.
The bypass means bypasses the printing medium from the delivery roller unit to the supply unit at the movement source predetermined position and bypasses the printing medium as the delivery roller unit moves to the movement destination predetermined position. The printer according to claim 1, wherein the printer is reduced to zero. The result of adding or subtracting the feeding change distance to the first distance is longer than the second distance,
The printer according to claim 1, wherein the bypass unit bypasses the print medium when the delivery roller unit is at least at the predetermined position of the movement destination. A plurality of conveyance paths for conveying the printing medium supplied from the supply unit to the head unit;
The delivery roller section includes a conveyance path that is a delivery destination of the printing medium when the delivery roller is at the predetermined position of the movement source, and a conveyance path that is a delivery destination of the printing medium when the position is the predetermined position of the movement destination. The printer according to claim 1, which is configured differently.

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