JP2016190290A - Cutting device and printing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cutting device and a printing device capable of performing half cut and full cut with a simple configuration.SOLUTION: A cutting mechanism 500 includes a cutting blade, a receiving base 180, a DC motor 104, a cutting blade moving mechanism 200, and a receiving base swing mechanism 520. A contact surface 183 of the receiving base 180 includes a first contact surface 181 provided with a retracting groove 187 and a second contact surface 182 formed in a planar shape. In each case where the DC motor 104 rotates in a forward direction and a reverse direction, a cutting blade moving mechanism 200 moves the cutting blade between a position away from the contact surface 183 and a position in contact with the contact surface 183. In a case where the DC motor 104 rotates in the forward direction, the receiving base swing mechanism 520 stops the receiving base 180 at a position where the first contact surface 181 faces the cutting blade. On the other hand, in a case where the DC motor 104 rotates in the reverse direction, the receiving base swing mechanism 520 swings the receiving base 180 to a position where the second contact surface 182 faces the cutting blade.SELECTED DRAWING: Figure 16

Description

  The present invention relates to a cutting device and a printing device including the cutting device.

  2. Description of the Related Art Conventionally, a cutting apparatus that performs full cut and half cut on an object to be cut is known. A full cut is an operation of cutting an object to be cut into two or more. Half-cut is an operation of cutting the object to be cut leaving a part thereof. For example, the cutting device described in Patent Literature 1 includes a cutter receiver and a cutter blade. The cutter receiver is switched between a first state in which the plane faces the cutter blade and a second state in which the surfaces provided with projections on the upper and lower sides face the cutter blade.

JP 2005-324404 A

  It is conceivable that the cutting device includes a motor that moves the cutter blade and a motor that switches the cutter receiver to the first state and the second state. In this case, the mechanism of the cutting device may be complicated.

  An object of the present invention is to provide a cutting apparatus and a printing apparatus that can perform a half cut and a full cut with a simple configuration.

  The cutting device according to the first aspect of the present invention is a cutting blade having a blade portion and a cradle having a contact surface with which the blade portion can contact, the contact surface being in contact with the blade portion. A cradle including a first contact surface in which the parts are arranged across the recess, and a second contact surface in which the part in contact with the blade part is continuous, a motor that rotates in the forward and reverse directions, and the cutting blade is moved A mechanism for supporting the cutting blade, wherein the cutting blade is separated from the contact surface in conjunction with the rotation of the motor when the motor rotates in the forward direction and the reverse direction, respectively. A cutting blade moving mechanism that moves between a separating position where the blade portion contacts the contact surface, a support portion that supports the cradle, and a first portion that swingably supports the support portion. And the first fulcrum part as a fulcrum in conjunction with the rotation of the motor. When the support portion swings, the first contact surface is moved from the first facing position where one of the first contact surface and the second contact surface faces the blade portion. And the second contact surface is a mechanism that causes the other surface to swing to a second facing position facing the blade portion, and when the motor rotates in the positive direction, the driving force of the motor is Transmission to the cradle is restricted, and the driving force is transmitted to the cradle when the cradle maintains the state of stopping at the first facing position while the motor rotates in the reverse direction. A cradle swinging mechanism that swings the cradle from the first facing position to the second facing position by allowing the support portion to swing around the first fulcrum portion as a fulcrum. It is provided with.

  According to the first aspect, the cutting device rotates the motor in the forward direction to sandwich and cut the object to be cut between the cradle at the first facing position and the blade portion. On the other hand, the cutting device rotates the motor in the reverse direction to sandwich and cut the object to be cut between the cradle at the second facing position and the blade portion. Thereby, the cutting device can perform a half cut and a full cut. The cutting device can perform half-cutting and full-cutting only by having a cutting blade, a cradle, and a motor, respectively. Therefore, the cutting device can perform a half cut and a full cut with a simple configuration.

  A printing apparatus according to a second aspect of the present invention includes the cutting apparatus, a printing unit that prints a cutting object, and a supply unit that supplies the cutting object printed by the printing unit to the cutting apparatus. It is characterized by that. According to the 2nd aspect, there can exist an effect similar to a 1st aspect.

1 is a perspective view of a printing apparatus 1. FIG. 2 is a plan view of the inside of a main body case 11. FIG. It is the perspective view which looked at the cutting mechanism 100 from the left front. It is the perspective view which looked at the cutting mechanism 100 from the right front. 3 is a cross-sectional perspective view of an intermittent gear 136 and a rotating member 106. FIG. It is a perspective view of the cradle support part 150 in which the cradle 180 exists in a 1st opposing position. 5 is a perspective view of a cam member 158. FIG. 5 is a cross-sectional perspective view of a support member 168. FIG. It is a left view of the cutting mechanism 100 in an initial state. It is a left view of the cutting | disconnection mechanism 100 at the time of completion | finish of a half cut. It is explanatory drawing which shows the flow in which the large diameter tube 9A is half-cut. It is explanatory drawing which shows the flow by which the small diameter tube 9B is half cut. It is a perspective view of the cradle support part 150 in which the cradle 180 exists in a 2nd opposing position. It is a left view of the cutting | disconnection mechanism 100 at the time of completion | finish of a full cut. It is explanatory drawing which shows the flow in which the large diameter tube 9A is fully cut. It is the perspective view which looked at the cutting mechanism 500 from the left front. It is the perspective view which looked at the cutting mechanism 500 from the right front. It is the perspective view which looked at the rotation member 106 from the right side. 4 is a right side view of the rotating member 106. FIG. It is a front view of the receiving stand 180 in a 1st opposing position. It is a front view of the receiving stand 180 in a 2nd opposing position. It is a left view which shows the rotation aspect of the link member 220 and the cam part 215 when the DC motor 104 rotates to a normal direction. It is a left view which shows the rotation aspect of the link member 220 and the cam part 215 when the DC motor 104 rotates in the reverse direction. FIG. 24 is a left side view illustrating a rotation mode of the link member 220 and the cam portion 215 when the DC motor 104 further rotates in the reverse direction from FIG. 23. It is a rear view which shows the rocking | fluctuation aspect of the receiving stand 180 by the support part 580 provided with the 2nd fulcrum part 600. FIG.

<1. Overview of Printing Apparatus 1>
A printing apparatus 1 as an example of an embodiment of the present invention will be described with reference to the drawings. Hereinafter, the upper, lower, lower right, upper left, upper right, and lower left in FIG. 1 will be defined as the upper, lower, front, rear, right, and left directions of the printing apparatus 1, respectively.

  The printing apparatus 1 shown in FIG.1 and FIG.2 is an apparatus which can print the tube 9 which is a cylindrical printing medium, and can cut | disconnect the tube 9 after printing. The printing apparatus 1 performs a half cut or a full cut on the tube 9 after printing. The full cut in this example is an operation of cutting the tube 9 in the circumferential direction and cutting the tube 9 into two or more. The half cut in this example is an operation of cutting the tube 9 while leaving a part in the circumferential direction. Hereinafter, the half cut and the full cut may be collectively referred to as a cutting operation.

  The tube 9 of this example includes a large-diameter tube 9A (see FIG. 11) and a small-diameter tube 9B (see FIG. 12). The large diameter tube 9A is a tube having an outer diameter of 7.5 mm and an inner diameter of 6.5 mm. The small diameter tube 9B is a tube having an outer diameter of 4.5 mm and an inner diameter of 4 mm.

  As shown in FIG. 1, the printing apparatus 1 includes a housing 10 including a main body case 11 and a cover 12. The main body case 11 is a rectangular parallelepiped box-shaped member that is long in the left-right direction. The cover 12 is a plate-like member disposed on the upper side of the main body case 11. The rear end portion of the cover 12 is rotatably supported on the upper rear end portion of the main body case 11. The lock mechanism 13 is provided on the upper side of the front end portion of the main body case 11. The lock mechanism 13 locks the front end portion of the cover 12 that is closed with respect to the main body case 11 to restrict the opening of the cover 12.

  When the cover 12 is closed with respect to the main body case 11 (see FIG. 1), the cover 12 covers the mounting surface 11A (see FIG. 2). The mounting surface 11 </ b> A is an upper surface of the main body case 11. When the user opens the cover 12, the user operates the lock mechanism 13 to release the lock of the cover 12, and rotates the cover 12 upward from the lock mechanism 13. When the cover 12 is opened with respect to the main body case 11, the mounting surface 11A is exposed upward (see FIG. 2).

  An operation unit 17, a tube insertion port 15 (see FIG. 2), and a tube discharge port 16 are provided on the side surface of the housing 10. The operation unit 17 is a plurality of operation buttons including a power button and a start button. The operation unit 17 is provided on the upper right side of the front surface of the main body case 11. The tube insertion port 15 is an opening for guiding the tube 9 into the housing 10. The tube insertion port 15 has a rectangular shape that is provided at the upper part on the rear side of the right surface of the main body case 11 and is slightly longer in the vertical direction. The tube discharge port 16 is an opening for discharging the tube 9 to the outside of the housing 10. The tube discharge port 16 is provided in the upper part on the rear side of the left surface of the main body case 11 and has a rectangular shape that is slightly longer in the vertical direction. The tube discharge port 16 is slightly in front of the tube insertion port 15.

  As shown in FIG. 2, the mounting surface 11A is provided with a ribbon mounting portion 30, a tube mounting portion 40, and the like. The ribbon mounting part 30 is a part where the ribbon cassette 90 can be attached and detached. The ribbon mounting portion 30 is a concave portion that opens upward and is formed in an opening shape substantially corresponding to the ribbon cassette 90 in plan view. The ribbon mounting portion 30 of this example is provided on the left side of the mounting surface 11 </ b> A and on the front side of the tube mounting portion 40.

  The tube mounting part 40 is a part where the tube 9 can be attached and detached. The tube mounting portion 40 is a groove portion that extends upward from the tube insertion port 15 to the vicinity of the right side of the tube discharge port 16 and opens upward. Since the tube discharge port 16 is slightly in front of the tube insertion port 15, the tube mounting portion 40 is slightly inclined to the left front side and extends in the substantially left-right direction. A direction in which the tube mounting portion 40 extends from the tube insertion port 15 toward the tube discharge port 16 is referred to as a tube conveyance direction. The tube conveying direction is parallel to the left-right direction and the front-rear direction, and is orthogonal to the up-down direction. The opening cross section of the tube mounting portion 40 orthogonal to the tube conveying direction is a cross section orthogonal to the extending direction of the tube 9 (that is, the tube 9 of the tube 9 except the portion where the tube mounting portion 40 and the ribbon mounting portion 30 are spatially connected). Slightly larger than (cross section). The user attaches the tube 9 to the tube attachment portion 40 along the tube conveyance direction so that the tube 9 extends from the tube insertion port 15 to the tube discharge port 16.

  With reference to FIG. 2, the control board 19, the power supply unit (not shown), the tube printing mechanism 60, and the ribbon cassette 90 will be described. The control board 19 is a board provided with a CPU, ROM, RAM, etc. (not shown) (see FIG. 16), and controls various operations of the printing apparatus 1. For example, the control board 19 controls the printing operation of the tube printing mechanism 60. The control board 19 of this example is provided in the right rear part inside the main body case 11 (see FIG. 3), and extends in the vertical direction and the horizontal direction. The power supply unit is connected to a battery (not shown) mounted in the main body case 11 or connected to an external power supply (not shown) via a cord to supply power to the printing apparatus 1. The power supply unit of this example is provided on the front side of the control board 19.

  The ribbon cassette 90 is a box-shaped body that can accommodate the ink ribbon 93. The ribbon roll 91 and the ribbon take-up spool 92 are rotatably supported in the ribbon cassette 90, respectively. The ribbon roll 91 is an unused ink ribbon 93 wound around a spool (not shown). The ribbon take-up spool 92 is a spool around which the used ink ribbon 93 is wound.

  The tube printing mechanism 60 includes a print head 61, a movable conveyance roller 62, a ribbon take-up shaft 63, a drive motor (not shown), and the like. The print head 61 and the ribbon take-up shaft 63 are each erected upward from the bottom surface of the ribbon mounting portion 30. The print head 61 is a thermal head provided with a heating element (not shown) provided at the rear part of the ribbon mounting part 30. The ribbon take-up shaft 63 is a shaft that can rotate the ribbon take-up spool 92.

  The movable conveyance roller 62 is a roller that can rotate relative to the print head 61. The movable conveying roller 62 is disposed on the rear side of the ribbon mounting portion 30 and can be displaced between an operating position and a retracted position as the cover 12 (see FIG. 1) is opened and closed. When the movable conveyance roller 62 is in the operating position, the movable conveyance roller 62 is disposed inside the tube mounting portion 40 and is close to the print head 61. When the movable conveyance roller 62 is in the retracted position, the movable conveyance roller 62 is disposed on the rear side of the tube mounting portion 40 and is separated from the print head 61. The drive motor (not shown) is a motor that rotationally drives the movable conveyance roller 62 and the ribbon take-up shaft 63.

  When the cover 12 is opened, the movable conveyance roller 62 is displaced to the retracted position. When the ribbon cassette 90 is mounted on the ribbon mounting portion 30, the ribbon winding shaft 63 is inserted into the ribbon winding spool 92. Thereafter, when the cover 12 is bound, the movable conveyance roller 62 is displaced to the operating position. The movable conveyance roller 62 urges the tube 9 in the tube mounting portion 40 and the unused ink ribbon 93 to overlap the print head 61. At this time, the tube 9 is elastically deformed by the urging force of the movable conveyance roller 62 and comes into surface contact with the print head 61 via the ink ribbon 93.

  The tube printing mechanism 60 executes the following printing operation under the control of the control board 19. The drive motor of the tube printing mechanism 60 rotates the movable conveyance roller 62 and the ribbon take-up shaft 63. As the movable conveyance roller 62 rotates, the tube 9 in the tube mounting portion 40 is conveyed downstream in the tube conveyance direction. At this time, the tube 9 before printing outside the housing 10 is drawn into the tube mounting portion 40 from the right surface of the main body case 11 through the tube insertion port 15. As the ribbon take-up spool 92 rotates as the ribbon take-up shaft 63 rotates, the ink ribbon 93 is pulled out from the ribbon roll 91.

The print head 61 uses the drawn ink ribbon 93 to print the character on the transported tube 9. The print head 61 of this example prints a normal image of the character on the front surface of the tube 9 via the rear side. Therefore, the front surface of the tube 9 is the printing surface of the tube 9. The used ink ribbon 93 is taken up by a ribbon take-up spool 92. The tube 9 after printing is conveyed from the movable conveyance roller 62 to the downstream side in the tube conveyance direction.
The tube 9 is discharged from the main body case 11 via the left end portion of the tube mounting portion 40 and the tube discharge port 16.

<2. Outline of Structure and Operation of Cutting Mechanism 100>
As shown in FIG. 2, a cutting mechanism 100 is provided between the left end portion of the tube mounting portion 40 and the tube discharge port 16. The cutting mechanism 100 is a mechanism that performs a cutting operation on the tube 9 after printing. The outline of the cutting mechanism 100 is as follows. The cutting mechanism 100 includes a cutting blade 275 (see FIG. 11) and a cradle 180. The cutting blade 275 and the cradle 180 are disposed to face each other with the tube conveyance path 9C (see FIG. 3) interposed therebetween. The tube conveyance path 9C is a path through which the tube 9 is conveyed from the left end of the tube mounting portion 40 to the tube discharge port 16, and extends in the left-right direction. The cutting mechanism 100 moves the cutting blade 275 toward the cradle 180 after the tube 9 is disposed on the cradle 180. The cutting blade 275 sandwiches the tube 9 with the cradle 180. The cutting operation with respect to the tube 9 is performed by the cutting blade 275 pressing the tube 9 toward the cradle 180. The cutting mechanism 100 switches the cutting operation on the tube 9 to half cut or full cut by switching the position of the cradle 180 in the left-right direction.

  As shown in FIG. 3, the cutting mechanism 100 includes a positioning unit 190 (see FIG. 2), a drive unit 110, a cradle moving mechanism 120, and a cutting blade moving mechanism 200. The positioning unit 190 positions the tube 9 after printing in the vertical direction and guides it toward the cradle 180. The drive unit 110 drives the cradle moving mechanism 120 and the cutting blade moving mechanism 200. The cradle moving mechanism 120 is a mechanism that supports the cradle 180 so as to be linearly movable in the left-right direction. The cutting blade moving mechanism 200 is a mechanism that supports the cutting blade 275 (see FIG. 11) so as to be movable in the front-rear direction.

<2-1. Positioning unit 190>
As shown in FIG. 2, the positioning portion 190 is disposed on the downstream side in the tube transport direction from the left end portion of the tube mounting portion 40. The positioning part 190 includes a bottom wall part 192, a rear wall part 194, and a front wall part 196. The bottom wall portion 192 is a wall portion disposed at substantially the same height as the bottom portion of the tube mounting portion 40. The shape of the bottom wall portion 192 is substantially rectangular in plan view. The bottom wall portion 192 contacts the tube 9 from the lower side and restricts the movement of the tube 9 to the lower side. Thereby, the bottom wall portion 192 can position the vertical position of the tube 9 supplied to the cutting mechanism 100. Hereinafter, the vertical position of the lower end of the tube 9 positioned by the bottom wall portion 192 is referred to as a reference position P (see FIG. 11).

  The rear wall portion 194 and the front wall portion 196 are wall portions erected upward from the rear end portion and the front end portion of the bottom wall portion 192, respectively. The rear wall portion 194 and the front wall portion 196 face each other with the tube conveyance path 9C interposed therebetween. The facing distance between the rear wall portion 194 and the front wall portion 196 is slightly longer than the outer diameter of the large diameter tube 9A.

<2-2. Drive unit 110>
As shown in FIGS. 3 and 4, the drive unit 110 is provided below the tube conveyance path 9 </ b> C. The drive unit 110 includes a support plate unit 102, a DC motor 104, and a gear group 105 (see FIG. 5). The support plate portion 102 includes a first plate portion 102A, a second plate portion 102B, and a third plate portion 102C (see FIG. 4). The first plate portion 102A is a plate-like body that extends in the vertical direction and the front-rear direction. The second plate portion 102B is a plate-like body that extends rightward from the upper end portion of the first plate portion 102A. A plate body 99 (see FIG. 9) extending in the left-right direction and the front-rear direction is attached to the upper surface of the second plate portion 102B. The third plate portion 102C (see FIG. 4) is a plate-like body that extends downward from the rear portion of the right end portion of the second plate portion 102B. An opening 102D (see FIG. 4) penetrating in the vertical direction is provided at the rear portion of the second plate portion 102B.

  The DC motor 104 is fixed to the front portion of the right surface of the first plate portion 102A. The output shaft of the DC motor 104 passes through the first plate portion 102A. A motor gear 104 </ b> A is provided at the tip of the output shaft of the DC motor 104.

  The gear group 105 (see FIG. 5) includes a plurality of gears. Each of the plurality of gears includes a plurality of gears rotatably provided on shaft portions extending leftward from the left surface of the first plate portion 102A. In FIG. 3, illustration of some of the plurality of gears is omitted (the same applies to FIG. 5).

  As shown in FIG. 5, the gear group 105 connects the motor gear 104A and the first gear portion 109 to each other. The first gear portion 109 is annular when viewed from the right side. The first gear portion 109 is integrally formed on the right portion of the rotating member 106 that is a disc-shaped member having a thickness in the left-right direction. The rotating member 106 is rotatably supported by a rotating shaft portion 103 that extends in the left-right direction. The rotation shaft portion 103 is fixed to the rear portion of the left surface of the first plate portion 102A. When the driving force of the DC motor 104 is transmitted through the motor gear 104 </ b> A and the gear group 105, the first gear portion 109 rotates around the rotation shaft portion 103.

  The rotating member 106 includes a second gear portion 101. The second gear portion 101 is formed inside the first gear portion 109 in the right portion of the rotating member 106. The second gear portion 101 rotates with the first gear portion 109 around the rotation shaft portion 103.

<2-3. Receiving base moving mechanism 120>
The cradle moving mechanism 120 will be described with reference to FIGS. The cradle moving mechanism 120 includes a drive transmission unit 130 and a cradle support unit 150. The drive transmission unit 130 is connected to the DC motor 104. The cradle support unit 150 moves the cradle 180 in the left-right direction by the driving force transmitted by the drive transmission unit 130.

  In FIG. 3, a holding member 152, a cam drive gear 156, and a cam member 158 described later in the drive transmission unit 130 are omitted. In FIG. 4, the support shaft 132, the gear 134, and the intermittent gear 136, which will be described later, are omitted from the drive transmission unit 130.

<2-3-1. Drive transmission unit 130>
4 and 5, the drive transmission unit 130 includes a support shaft 132, a gear 134 (see FIG. 5), an intermittent gear 136, a holding member 152 (see FIG. 4), and a first shaft portion 154 (see FIG. 4). ), A cam drive gear 156 (see FIG. 4), and a cam member 158 (see FIG. 6). The support shaft 132 is a shaft portion that extends in the left-right direction and is rotatably supported by the first plate portion 102A and the third plate portion 102C. The support shaft 132 extends to the left side of the first plate portion 102A.

  The gear 134 is supported by the support shaft 132 on the left side of the first plate portion 102A. The gear 134 meshes with the second gear portion 101. Therefore, when the first gear portion 109 described above rotates with the rotation of the DC motor 104, the second gear portion 101 rotates the support shaft 132.

  The intermittent gear 136 is supported by the support shaft 132 between the first plate portion 102A and the third plate portion 102C. A part of the peripheral surface of the intermittent gear 136 is exposed upward from the opening 102D of the second plate portion 102B.

  The intermittent gear 136 can rotate together with the support shaft 132. Hereinafter, of the rotation directions around the support shaft 132 of the intermittent gear 136, the counterclockwise direction in the right side view is referred to as a first rotation direction, and the opposite direction to the first rotation direction is referred to as a second rotation direction. The first rotation direction is the direction in which the arrow A1 shown in FIG. 4 faces. The second rotation direction is the direction in which the arrow A2 shown in FIG. 4 is directed. When the DC motor 104 rotates in the forward direction, the intermittent gear 136 rotates in the first rotation direction. When the DC motor 104 rotates in the reverse direction that is opposite to the normal direction, the intermittent gear 136 rotates in the second rotation direction.

  As shown in FIG. 4, the intermittent gear 136 is provided with a first tooth portion 136 </ b> A in a part of the circumferential surface in the rotation direction. The first tooth portion 136A extends along the rotation direction of the intermittent gear 136. The first tooth portion 136A includes an end portion 136B and an end portion 136C. The end portion 136B is an end portion of the first tooth portion 136A in the second rotational direction (arrow A2 direction). The end portion 136C is an end portion of the first tooth portion 136A in the first rotation direction (arrow A1 direction).

  The tooth portion forming angle of the intermittent gear 136 of this example is 76 °. A tooth | gear part formation angle is a rotation angle which reaches along the 1st rotation direction from the edge part 136B to the edge part 136C. The tooth portion forming angle is an angle α shown in FIG. On the other hand, the tooth part non-formation angle of the intermittent gear 136 of this example is 284 degrees as an example. The tooth non-forming angle is a rotation angle that extends along the second rotation direction from the end 136B to the end 136C. The tooth portion non-forming angle is an angle β shown in FIG.

  As shown in FIGS. 4 and 6, the holding member 152 is disposed on the upper left side with respect to the intermittent gear 136 and is provided on the upper surface of the plate body 99 (see FIG. 9). The holding member 152 includes a left plate 152A, a right plate 152B, and a lower plate 152C. The left plate 152A and the right plate 152B face each other with a gap along the left-right direction. Both the left plate 152A and the right plate 152B are L-shaped plate-like bodies having a thickness in the left-right direction as viewed from the left side. The inner corners of the left plate 152A and the right plate 152B are close to the tube conveyance path 9C (see FIG. 3).

  The lower plate 152C connects the lower ends of the left plate 152A and the right plate 152B. The shape of the lower plate 152C is a plate-like body having a substantially rectangular shape in plan view. The lower plate 152C extends from the rear side to the front side of the tube conveyance path 9C.

  As shown in FIG. 6, the first shaft portion 154 is a shaft portion that extends in the left-right direction and is rotatably supported by the lower portions of the left plate 152A and the right plate 152B. The first shaft portion 154 extends to the right side of the right plate 152B.

  The cam drive gear 156 is supported by the right end portion of the first shaft portion 154. The cam drive gear 156 can rotate around the first shaft portion 154. The cam drive gear 156 is located on the rear side of the rear wall portion 194 (see FIG. 2). A second tooth portion 156 </ b> A is provided on the peripheral surface of the cam drive gear 156. The second tooth portion 156 </ b> A extends over the rotational direction of the cam drive gear 156. The second tooth portion 156A can mesh with the first tooth portion 136A of the intermittent gear 136.

  When the second tooth portion 156A meshes with the first tooth portion 136A (see FIG. 4), the cam drive gear 156 is rotated by the intermittent gear 136. When the intermittent gear 136 rotates in the second rotation direction (arrow A2 direction in FIG. 4), the cam drive gear 156 rotates in the third rotation direction. The third rotation direction is the direction in which the arrow A3 shown in FIG. 6 is directed. When the intermittent gear 136 rotates in the first rotation direction (the arrow A1 direction in FIG. 4), the cam drive gear 156 rotates in the fourth rotation direction. The fourth rotation direction is a direction in which an arrow A4 shown in FIG. 6 is directed.

  The cam member 158 is supported by the first shaft portion 154 between the left plate 152A and the right plate 152B. The cam member 158 includes a cylindrical portion 159. The cylindrical portion 159 extends in the left-right direction. The first shaft portion 154 is inserted into the cylindrical hole of the cylindrical portion 159 (see FIG. 7). As a result, the cam member 158 rotates around the first shaft portion 154 in conjunction with the rotation of the cam drive gear 156. The rotation direction of the cam member 158 and the rotation direction of the cam drive gear 156 coincide with each other.

  As shown in FIG. 7, a cam portion 160 is formed on the right portion of the outer peripheral surface of the cylindrical portion 159. The cam portion 160 can rotate together with the cylindrical portion 159. The cam portion 160 is formed so as to surround the right portion of the outer peripheral surface of the cylindrical portion 159 in the rotational direction. A part of the left part of the cam part 160 is notched toward the right.

  The cam portion 160 includes a cam surface 162. The cam surface 162 is formed on the surface of the cam portion 160 at a portion facing left and a portion facing the fourth rotation direction (arrow A4 direction). The cam surface 162 includes a first cam surface 162A, a second cam surface 162B, and a third cam surface 162C.

  The first cam surface 162A extends to the left side along the fourth rotational direction. The formation angle of the first cam surface 162A around the first shaft portion 154 is 82 °. The second cam surface 162B is connected to the right end portion of the first cam surface 162A. The second cam surface 162B is a surface that extends in the direction away from the first shaft portion 154 (see FIG. 6) and in the left-right direction. The length in the left-right direction of the first cam surface 162A and the length in the left-right direction of the second cam surface 162B are equal to each other and correspond to the distance L shown in FIG. The third cam surface 162C connects the end portion of the first cam surface 162A in the fourth rotation direction and the left end portion of the second cam surface 162B. The third cam surface 162C is parallel to the third rotation direction and the fourth rotation direction.

  A specific cam surface 164 is formed on the outer peripheral surface of the cam portion 160. The specific cam surface 164 is disposed on the right side of the third cam surface 162C. The specific cam surface 164 extends in the third rotational direction from the end of the second cam surface 162B in the direction away from the first shaft portion 154.

<2-3-2. Receiving Support Unit 150>
As shown in FIGS. 6 and 8, the cradle support unit 150 includes support rods 161 and 163, a sliding member 172, and a cradle 180. The support bars 161 and 163 extend in the left-right direction above the cam member 158, respectively. The support bars 161 and 163 are arranged in order from the upper side. Both left and right ends of the support bars 161 and 163 are fixed to the left plate 152A and the right plate 152B, respectively.

  The support member 168 is supported between the left plate 152A and the right plate 152B by the support rods 161 and 163 so as to be linearly movable in the left-right direction. The support member 168 is located above the cam member 158. The shape of the support member 168 is a box shape in which the lower side and the rear side are opened.

  The support member 168 includes a left wall portion 168A and a right wall portion 168B. The left wall portion 168A and the right wall portion 168B face each other with a gap along the left-right direction. Two holes 169 through which the support rods 161 and 163 are inserted are provided in the left wall portion 168A and the right wall portion 168B, respectively.

  Of the two hole portions 169 of the left wall portion 168A, a contact wall portion (not shown) is provided inside the hole portion 169 on the upper side. The contact wall portion is a plate-like body having a thickness in the left-right direction, and a circular hole (not shown) concentric with the hole portion 169 is provided. The support rod 163 is inserted through the circular hole.

  The left end position of the movable range of the support member 168 is a left-right position where the left wall portion 168A contacts the left plate 152A (see FIG. 13). The right end position of the movable range of the support member 168 is a left-right position where the right wall portion 168B contacts the right plate 152B (see FIGS. 3, 4, 6, etc.).

  As shown in FIG. 8, the sliding member 172 is rotatably supported by the support bar 163 between the left wall portion 168A (see FIG. 6) and the right wall portion 168B. The sliding member 172 has a substantially rectangular parallelepiped shape. The length of the upper part of the sliding member 172 in the left-right direction is slightly shorter than the facing distance between the right wall portion 168B and the left wall portion 168A. The sliding member 172 includes a sliding portion 172A. The sliding portion 172A protrudes downward from the support member 168. The lower end portion of the sliding portion 172A is curved in an arc shape toward the lower side. The sliding portion 172A is slidable with respect to the cam surface 162 or the specific cam surface 164.

  The sliding member 172 can rotate between the first rotation position and the second rotation position around the support rod 163. The first rotation position is a rotation position of the sliding member 172 where the sliding portion 172A slides with respect to the cam surface 162. When the sliding member 172 is in the first rotation position, the sliding portion 172A protrudes downward from the support member 168. The second rotation position is a rotation position of the sliding member 172 where the sliding portion 172A slides with respect to the specific cam surface 164. The second rotation position is a position slightly rotated in the clockwise direction in the left side view with respect to the first rotation position. In FIG. 8, the sliding member 172 in the first rotation position is illustrated by a solid line, and the sliding member 172 in the second rotation position is illustrated by a two-dot chain line.

  A restricting portion 168D is provided on the front side of the sliding member 172 in the first rotation position. The restricting portion 168D protrudes leftward from the front lower portion of the left surface of the right wall portion 168B. The restricting portion 168D comes into contact with the sliding member 172 at the first rotation position from the front side.

  As shown in FIG. 6, coil springs 171 and 173 are inserted through the support rods 161 and 163, respectively. The coil spring 171 enters the hole 169 and urges the contact wall (not shown) to the right. The coil spring 173 passes through the inside of the hole 169 and biases the sliding member 172 to the right. As a result, the sliding member 172 is biased to the right. When the slidable member 172 to be urged is in the first rotation position, the cam surface 162 is restricted from moving rightward. When the slidable member 172 to be urged is in the second rotational position, movement to the right is restricted by the left surface of the right wall portion 168B.

  As shown in FIG. 3, the cradle 180 is provided at the front end of the support member 168. The cradle 180 is located to the left of the rear wall 194 (see FIG. 2). That is, the cradle 180 is provided on the downstream side of the positioning unit 190 in the tube conveyance direction. The shape of the cradle 180 is a substantially rectangular parallelepiped shape. The front end surface of the cradle 180 is a contact surface 183 with which the cutting blade 275 can contact. The tube 9 can be disposed on the contact surface 183. The contact surface 183 extends from the upper side to the lower side of the reference position P in the vertical direction (see FIGS. 11 and 15).

  The contact surface 183 includes a first contact surface 181 and a second contact surface 182. The first contact surface 181 is provided on the left side of the second contact surface 182. A retreat groove 187 into which a part in the circumferential direction of the tube 9 can enter is provided at the center of the first contact surface 181 in the vertical direction. The retreat groove 187 is provided in a portion of the first contact surface 181 that includes the reference position P in the vertical direction (see FIG. 11). In the first contact surface 181, the portions above and below the retracting groove 187 are contact planes 181 </ b> A formed in a planar shape. The two contact planes 181A extend in the left-right direction and the up-down direction. The two contact planes 181A are on the same plane.

  As shown in FIG. 11, the retreat groove 187 is a recess that is recessed rearward. The shape of the retracting groove 187 is substantially rectangular in a front view. The length of the retracting groove 187 in the front-rear direction is the depth of the retracting groove 187. The retreat groove 187 includes a first surface 187A, a second surface 187B, and a third surface 187C. The first surface 187A is a plane extending rearward from the lower end of the contact plane 181A on the upper side of the two contact planes 181A. The second surface 187B is a plane extending backward from the upper end of the contact plane 181A on the lower side of the two contact planes 181A. The length of the second surface 187B in the front-rear direction is longer than the length of the first surface 187A in the front-rear direction. The third surface 187C is a plane that connects the rear ends of the first surface 187A and the second surface 187B. The third surface 187C forms the groove bottom of the retracting groove 187. The third surface 187 </ b> C is inclined in a direction toward the front and extends linearly as it goes upward. That is, a portion of the third surface 187C that is on the upper side of the reference position P extends upward toward the contact plane 181A. The maximum groove depth of the retracting groove 187 in this example is less than 0.5 mm. The maximum groove depth in this example is a separation distance in the left-right direction between the lower end of the third surface 187C and the contact plane 181A.

  As shown in FIG. 4, the second contact surface 182 is a plane that extends in the vertical direction and the horizontal direction. The second contact surface 182 is on the same plane as the two contact planes 181A.

  Since the cradle 180 is provided on the support member 168, it can move linearly in the left-right direction. The cradle 180 is linearly movable between the first facing position and the second facing position. The first facing position is the right end position of the movable range of the cradle 180. In this example, when the cradle 180 is in the first facing position, the first contact surface 181 faces the cutting blade 275. The second facing position is the left end position of the movable range of the cradle 180. In this example, when the cradle 180 is in the second facing position, the second contact surface 182 faces the cutting blade 275.

<2-3-3. Positional relationship of various members when cradle moving mechanism 120 is in initial state>
The positional relationship among the intermittent gear 136, the cam member 158, the sliding member 172, the support member 168, and the cradle 180 when the cradle moving mechanism 120 having the above structure is in the initial state will be described. The initial state of the cradle moving mechanism 120 is a state of the cradle moving mechanism 120 before the cutting mechanism 100 starts the cutting operation.

  When the cradle moving mechanism 120 is in the initial state, the intermittent gear 136 is in the start rotation position (see FIG. 4). The start rotation position is a rotation position of the intermittent gear 136 that has slightly rotated in the first rotation direction from the rotation position at which the end 136B meshes with the second tooth portion 156A. The intermittent gear 136 at the start rotation position does not mesh with the cam drive gear 156. That is, transmission of the driving force of the DC motor 104 to the cam driving gear 156 is restricted.

  When the cradle moving mechanism 120 is in the initial state, the cam member 158 is in a rotational position where the second cam surface 162B is disposed substantially above the first shaft portion 154 (see FIG. 6). When the cradle moving mechanism 120 is in the initial state, the sliding member 172 is in the first rotation position (see FIG. 8). The sliding portion 172A of the sliding member 172 is pressed against the right end portion of the first cam surface 162A by the biasing force of the coil spring 173 (see FIG. 6). At this time, the upper part of the sliding member 172 contacts the left surface of the right wall part 168B. The support member 168 is biased by the coil spring 171 at the right end position of the movable range. The support member 168 is restricted from moving rightward by the right plate 152B. At this time, the cradle 180 is in the first facing position (see FIG. 3).

<2-3-4. Outline of operation of cradle moving mechanism 120>
If the DC motor 104 rotates in the forward direction when the cradle moving mechanism 120 is in the initial state, the intermittent gear 136 (see FIG. 4) rotates in the first rotation direction (arrow A1 direction). Therefore, the intermittent gear 136 idles without meshing with the cam drive gear 156. Accordingly, the cradle moving mechanism 120 restricts the driving force of the DC motor 104 from being transmitted to the cam driving gear 156.

  On the other hand, when the cradle moving mechanism 120 is in the initial state, when the DC motor 104 rotates in the reverse direction, the intermittent gear 136 (see FIG. 4) rotates in the second rotation direction (arrow A2 direction). Immediately after the intermittent gear 136 starts to rotate in the second rotation direction, the end portion 136B of the first tooth portion 136A meshes with the second tooth portion 156A. The cradle moving mechanism 120 allows the driving force of the DC motor 104 to be transmitted to the cam driving gear 156. As the intermittent gear 136 continues to rotate in the second rotation direction, the cam drive gear 156 is rotated in the third rotation direction (the direction of arrow A3 in FIG. 6). The cam drive gear 156 rotates the first shaft portion 154 (see FIG. 6) in the third rotation direction. As a result, the cam member 158 rotates in the third rotation direction. The first cam surface 162A rotating in the third rotation direction slides with the sliding portion 172A. As a result, the sliding member 172 moves to the left against the urging force of the coil spring 173. The sliding member 172 moves to the left in a state where the rotation in the counterclockwise direction in the left side view is restricted by the restriction portion 168D (see FIG. 8). The sliding member 172 that moves to the left biases the support member 168 to the left. The support member 168 moves to the left against the urging force of the coil spring 171 from the right end position of the movable range. The cradle 180 moves to the left from the first facing position.

<2-4. Cutting blade moving mechanism 200>
The cutting blade moving mechanism 200 will be described with reference to FIGS. 3 and 9. The cutting blade moving mechanism 200 includes a rotation driving unit 210 and a cutting blade moving unit 270. The rotation drive unit 210 is driven to rotate in conjunction with the rotation of the DC motor 104. The cutting blade moving unit 270 moves the cutting blade 275 in the front-rear direction as the rotation driving unit 210 rotates.

<2-4-1. Rotation Drive Unit 210>
The rotation drive unit 210 includes a cam unit 215, an initial position sensor 241, an intermediate position sensor 242, and a link member 220. The cam part 215 is a part formed in the left part of the rotation member 106 (refer FIG. 5) mentioned above. The shape of the cam part 215 is circular when viewed from the left side. The cam portion 215 can rotate around the rotation shaft portion 103 together with the first gear portion 109 (see FIG. 5). Hereinafter, the counterclockwise direction in the left side view with the rotation shaft 103 as the center is referred to as a first direction, and the opposite direction to the first direction is referred to as a second direction. The first direction is the direction in which the arrow B1 shown in FIG. 9 faces. The second direction is the direction in which the arrow B2 shown in FIG. 9 faces. When the DC motor 104 rotates in the forward direction, the cam portion 215 rotates in the first direction, and when the DC motor 104 rotates in the reverse direction, the cam portion 215 rotates in the second direction.

  The cam portion 215 includes a right protruding portion 211 and a left protruding portion 212. Each of the right protrusion 211 and the left protrusion 212 is a plate-like body that protrudes radially outward from the circumferential surface of the cam portion 215.

  The right protruding portion 211 is provided on the right side of the circumferential surface of the cam portion 215 with respect to the center in the left-right direction (that is, the back side of the paper surface in FIG. 9). The right protruding portion 211 is provided on a part of the circumferential direction of the cam portion 215 in the rotation direction around the rotation shaft portion 103. The formation angle of the right protrusion 211 in this example is 90 ° or more. The formation angle of the right protrusion 211 is a rotation angle that extends along the first direction from the end of the right protrusion 211 in the second direction to the end of the right protrusion 211 in the first direction. The end surface in the second direction of the right protruding portion 211 is inclined in a direction away from the rotation shaft portion 103 as it goes in the first direction.

  The left protruding portion 212 is provided on the left side of the circumferential surface of the cam portion 215 with respect to the center in the left-right direction (that is, on the front side in the drawing of FIG. 9). That is, the left protrusion 212 is disposed on the left side of the right protrusion 211. The left protrusion 212 is provided on a part of the circumferential surface of the cam portion 215 in the rotation direction around the rotation shaft portion 103. The formation angle of the left protrusion 212 in this example is smaller than the formation angle of the right protrusion 211. The formation angle of the left protrusion 212 is a rotation angle that extends along the first direction from the end of the left protrusion 212 in the second direction to the end of the left protrusion 212 in the first direction. The end surface in the second direction of the left protrusion 212 is inclined in a direction away from the rotation shaft 103 as it goes in the first direction. The end surface in the first direction of the left protrusion 212 is inclined in a direction away from the rotary shaft 103 as it goes in the second direction. The end surface in the second direction of the left protrusion 212 is closer to the first direction than the end surface in the second direction of the right protrusion 211.

  A pressing pin 215 </ b> A is provided on the left surface of the cam portion 215. The pressing pin 215 </ b> A is a cylindrical body that protrudes leftward from the cam portion 215. The pressing pin 215 </ b> A is disposed at a position rotated by approximately 90 ° in the second direction with respect to the end surface in the second direction of the right protruding portion 211.

  The cam portion 215 shown in FIGS. 3 and 9 is in the initial rotation position. When the cam portion 215 is at the initial rotation position, the pressing pin 215A is at a rotation position slightly rotated in the first direction from the rotation position directly above the rotation shaft portion 103.

  As shown in FIG. 9, the initial position sensor 241 is provided on the rear lower portion of the left surface of the first plate portion 102A. The initial position sensor 241 includes a first rotating shaft (not shown), a movable portion 241A, and a first spring (not shown). The first rotation shaft extends in the left-right direction at the upper rear side inside the initial position sensor 241. The movable portion 241A is rotatably provided on the first rotation shaft. The movable portion 241A extends from the first rotation shaft to the lower front side. The tip of the movable portion 241 </ b> A that is the end opposite to the first rotation axis is curved on an arc toward the rotation shaft 103. The first spring urges the movable portion 241A in the counterclockwise direction as viewed from the left side about the first rotation axis.

  The rotating right protruding portion 211 contacts and separates from the movable portion 241A. The movable portion 241A is in a steady position when it is separated from the right protruding portion 211. When the movable portion 241A is in the steady position, the distal end portion of the movable portion 241A enters the movement path of the right protruding portion 211. In this case, the initial position sensor 241 outputs an OFF signal. When the movable portion 241 </ b> A comes into contact with the right protruding portion 211, the movable portion 241 </ b> A is on the clockwise direction side in the left side view from the steady position. In this case, the initial position sensor 241 outputs an ON signal. When the cam portion 215 is in the initial rotation position, the end surface in the second direction of the right protruding portion 211 is slightly separated in the first direction with respect to the tip portion of the movable portion 241A. Accordingly, when the cam portion 215 is at the initial rotation position, the initial position sensor 241 outputs an OFF signal.

The intermediate position sensor 242 is provided on the rear upper part of the left surface of the first plate portion 102A. The intermediate position sensor 242 is at a position rotated by approximately 90 ° in the second direction from the initial position sensor 241.
The intermediate position sensor 242 is disposed on the left side of the initial position sensor 241. The intermediate position sensor 242 includes a second rotating shaft (not shown), a movable portion 242A, and a second spring (not shown). The second rotation shaft extends in the left-right direction at the lower rear side inside the intermediate position sensor 242. The movable portion 242A is rotatably provided on the second rotation shaft. The movable portion 242A extends from the second rotation shaft to the upper front side. Of the movable portion 242 </ b> A, a tip portion that is an end portion on the opposite side to the second rotation shaft is curved on an arc toward the rotation shaft portion 103. The second spring urges the movable portion 242A in the clockwise direction as viewed from the left side about the second rotation axis.

  The rotating left protrusion 212 is in contact with and away from the movable part 242A. The movable portion 242A is in a steady position when it is separated from the left protruding portion 212. When the movable portion 242A is in the steady position, the distal end portion of the movable portion 242A enters the movement path of the left protruding portion 212. In this case, the intermediate position sensor 242 outputs an OFF signal. When the movable portion 242A is in contact with the left protruding portion 212, the movable portion 242A is on the counterclockwise direction side in the left side view from the steady position. In this case, the intermediate position sensor 242 outputs an ON signal. When the cam portion 215 is in the initial rotation position, the end surface in the second direction of the left protruding portion 212 is separated at a position rotated by 90 ° or more in the first direction with respect to the tip portion of the movable portion 242A. The end surface of the left protrusion 212 in the first direction is separated at a position rotated 90 ° or more in the second direction with respect to the tip of the movable portion 242A. Therefore, when the cam portion 215 is at the initial rotation position, the intermediate position sensor 242 outputs an OFF signal.

  The link member 220 is a substantially L-shaped plate member when viewed from the right side. The link member 220 is provided on the left side of the gear group 105 and the cam portion 215. The link member 220 is rotatable around a link shaft portion 223 extending in the left-right direction. The right end portion of the link shaft portion 223 is fixed to the left surface of the first plate portion 102A. Hereinafter, the counterclockwise direction in the left side view centering on the link shaft portion 223 is referred to as a third direction, and the direction opposite to the third direction is referred to as a fourth direction. The third direction is the direction in which the arrow B3 shown in FIG. 9 is directed. The fourth direction is the direction in which the arrow B4 shown in FIG. 9 faces.

  As shown in FIG. 9, the link member 220 includes a first plate-like portion 221 and a second plate-like portion 222. The first plate-like portion 221 is a plate-like portion extending substantially in the front-rear direction below the tube conveyance path 9C. The second plate-like portion 222 is a plate-like portion extending from the front end portion of the first plate-like portion 221 to the upper side with an inclination of approximately 90 ° with respect to the first plate-like portion 221. The upper end portion of the second plate-like portion 222 is disposed on the front side with respect to the tube conveyance path 9C. The rear lower part of the second plate-like part 222 is connected to the left end part of the link shaft part 223.

  The link member 220 urges the link shaft portion 223 in the fourth direction by a spring 220 </ b> A provided on the link shaft portion 223. The link member 220 to be biased is restricted from rotating in the fourth direction at a position where the link protrusion 224 contacts the plate body 99 described above. The link protrusion 224 is a protrusion that protrudes obliquely upward and rearward from the front part of the upper surface of the first plate-like part 221. Hereinafter, the rotation position of the link member 220 where the link protrusion 224 contacts the plate body 99 is referred to as a separation rotation position. The link member 220 shown in FIGS. 3, 4, and 9 is in the separated rotation position.

  The first plate portion 221 is provided with a spring shaft portion 226, locking pieces 225 and 227, and an escape groove 228. The spring shaft portion 226 protrudes leftward from the left surface of the first plate-like portion 221. The spring shaft portion 226 is disposed below the link protrusion 224.

  Each of the locking pieces 225 and 227 protrudes forward from the first plate-shaped portion 221. The locking piece 225 is provided at the rear end portion of the upper surface of the first plate-like portion 221. The locking piece 225 is disposed behind the spring shaft portion 226. The locking piece 227 is provided on the rear side of the lower surface of the first plate-like portion 221 with respect to the front-rear direction center. The position of the locking piece 227 in the front-rear direction is between the locking piece 225 and the spring shaft portion 226. The relief groove 228 is a groove portion that is provided in a portion between the locking piece 225 and the link protrusion 224 on the upper surface of the first plate-like portion 221 and is curved and recessed downward. The center part in the front-rear direction of the escape groove 228 is formed below the locking piece 225.

  The first plate-like portion 221 is provided with a torsion spring 235 elastically deformed. The torsion spring 235 includes a coil part 233, a first arm part 231, and a second arm part 232. The axis of the coil part 233 extends in the left-right direction. The coil part 233 is inserted through the spring shaft part 226.

  The first arm portion 231 extends rearward from the right end portion of the coil portion 233. The tip of the first arm portion 231 is locked to the locking piece 225 by urging the locking piece 225 from below. The first arm portion 231 is disposed below the pressing pin 215A of the cam portion 215. The distal end portion of the rotating pressing pin 215A comes in contact with and separates from the first arm portion 231. The second arm portion 232 extends rearward from the left end portion of the coil portion 233. The second arm part 232 is disposed below the first arm part 231. The tip of the second arm portion 232 is locked to the locking piece 227 by urging the locking piece 227 from above.

  A protruding pin 238 is provided on the second plate-like portion 222. The protruding pin 238 protrudes rightward from the upper end portion of the second plate-shaped portion 222. When the link member 220 is in the separated rotation position, the protruding pin 238 is positioned at the front end position of the movable range.

<2-4-2. Cutting blade moving part 270>
As shown in FIGS. 3, 4, and 9, the cutting blade moving unit 270 includes a housing member 272, a rail member 274, a cutting blade 275 (see FIG. 11), and an arm member 277. The housing member 272 is placed on the front portion of the lower plate 152C of the holding member 152, and faces the cradle 180 from the front side. That is, the housing member 272 is located downstream of the positioning portion 190 (see FIG. 2) in the tube conveyance direction. The housing member 272 is a box-shaped member that opens on the rear side. The housing member 272 is movable in the front-rear direction. A through hole 272 </ b> A is provided in the upper portion of the front wall portion of the housing member 272.

  The rail member 274 is a cylindrical body that extends through the lower portion of the housing member 272 in the front-rear direction. The rail member 274 is provided below the tube conveyance path 9C. The rail member 274 guides the accommodation member 272 moving in the front-rear direction.

  The cutting blade 275 (see FIG. 11) is housed inside the housing member 272. The cutting blade 275 is a plate-like body having a thickness in the left-right direction. A blade portion 275A (see FIG. 11) extending linearly in the vertical direction is formed at the rear end portion of the cutting blade 275. The cutting blade 275 is biased forward by a mounting spring (not shown) provided inside the housing member 272. The cutting blade 275 can move in the front-rear direction relative to the housing member 272, and the blade portion 275 </ b> A can protrude rearward from the housing member 272.

  The arm member 277 extends in the front-rear direction. The arm member 277 is inserted into the through hole 272A. The rear end portion of the arm member 277 is connected to the cutting blade 275. A cylindrical portion 277 </ b> A is formed at the front end portion of the arm member 277. The cylindrical portion 277A has an oval shape that is long in the vertical direction when viewed from the right side. The protruding pin 238 of the link member 220 is inserted from the left side into the cylindrical hole 277B of the cylindrical portion 277A. Thereby, when the link member 220 rotates around the link shaft portion 223, the arm member 277 is movable in the left-right direction.

<2-4-3. Positional relationship of various members when cutting blade moving mechanism 200 is in the initial state>
The positional relationship among the cam portion 160, the link member 220, the housing member 272, and the cutting blade 275 when the cutting blade moving mechanism 200 having the above structure is in the initial state will be described. The initial state of the cutting blade moving mechanism 200 is the state of the cutting blade moving mechanism 200 before the cutting mechanism 100 starts the cutting operation.

  When the cutting blade moving mechanism 200 is in the initial state, the cam portion 160 is in the initial rotation position, and the link member 220 is in the separated rotation position. In this case, the front end portion of the pressing pin 215A of the cam portion 215 is in contact with the first arm portion 231 of the torsion spring 235 from above. Since the link member 220 is in the separated rotation position, the protruding pin 238 is in the front end position of the movable range. The arm member 277 and the accommodation member 272 are each at the front end position of the movable range. The arrangement position of the cutting blade 275 when the housing member 272 is at the front end position of the movable range is referred to as a separated position. The separation position is the front end position of the movable range of the cutting blade 275. When the cutting blade 275 is in the separated position, the cutting blade 275 is separated from the contact surface 183 of the cradle 180 and is housed inside the housing member 272.

<2-4-4. Outline of Operation of Cutting Blade Moving Mechanism 200>
As shown in FIG. 9, when the cutting blade moving mechanism 200 is in the initial state, when the DC motor 104 rotates in the forward direction, the cam portion 215 rotates in the first direction (arrow B1 direction). As the cam portion 215 rotates in the first direction, the pressing pin 215A presses the first arm portion 231 counterclockwise as viewed from the left side. The link member 220 rotates in the third direction (arrow B3 direction). The protruding pin 238 of the link member 220 moves the arm member 277 backward. The arm member 277 moves the cutting blade 275 backward. Accordingly, the housing member 272 moves rearward from the front end position of the movable range.

  On the other hand, when the cutting blade moving mechanism 200 is in the initial state, when the DC motor 104 rotates in the reverse direction, the cam portion 215 rotates in the second direction (the arrow B2 direction in FIG. 9). The link member 220 maintains a state in which the link member 220 is located at the separated rotation position.

  As the cam portion 215 rotates in the second direction, the pressing pin 215A is separated from the first arm portion 231 and rotates in the second direction. The cam part 215 rotates to a specific rotation position. In FIG. 9, the pressing pin 215 </ b> A rotated to the specific rotation position is illustrated by a two-dot chain line. The specific rotation position is a position that is substantially symmetrical with respect to the virtual plane T from the initial rotation position. The virtual plane T is a virtual plane that includes the axis of the rotation shaft portion 103 and extends in the left-right direction and the up-down direction. When the cam portion 215 rotates to the specific rotation position, the pressing pin 215A comes into contact with the first arm portion 231 again. The position where the pressing pin 215A contacts the first arm portion 231 is closer to the coil portion 233 than when the DC motor 104 rotates in the forward direction.

  When the DC motor 104 continues to rotate in the reverse direction, the cam portion 215 further rotates in the second direction from the specific rotation position. The pressing pin 215A presses the first arm portion 231 counterclockwise when viewed from the left side. The link member 220 rotates in the third direction, and moves the housing member 272 backward from the front end position of the movable range.

<3. Cutting operation of cutting mechanism 100>
Hereinafter, the cutting operation of the cutting mechanism 100 will be described separately for the half-cut operation of the tube 9 and the full-cut operation of the tube 9. The cutting mechanism 100 before starting the cutting operation is in an initial state. When the cutting mechanism 100 is in the initial state, the cradle moving mechanism 120 is in the initial state, and the cutting blade moving mechanism 200 is in the initial state. The initial position sensor 241 and the intermediate position sensor 242 output an OFF signal. When the cutting mechanism 100 is in the initial state, the tube 9 is positioned on the bottom wall portion 192 of the positioning portion 190 by the user. That is, the tube 9 is disposed on the contact surface 183 with the lower end positioned at the reference position P (see FIG. 3).

<3-1. Half-cut operation of cutting mechanism 100>
The operation of the cutting mechanism 100 for half-cutting the large-diameter tube 9A will be described with reference to FIGS. In addition, in FIG. 11, sectional drawing seen from the left side of the receiving stand 180, the cutting blade 275, and the tube 9 is shown typically, and hatching of the rear-end part of the cutting blade 275 is abbreviate | omitted. (The same applies to FIGS. 12 and 15)

  The outline of the half-cut operation for the large-diameter tube 9A is as follows. The cutting mechanism 100 maintains the state in which the cradle 180 stops at the first facing position, and sandwiches the large-diameter tube 9A between the first contact surface 181 and the cutting blade 275. When the cutting blade 275 presses the large-diameter tube 9A toward the first contact surface 181, the large-diameter tube 9A is half-cut. In accordance with the CPU drive control of the control board 19 (see FIG. 2), the DC motor 104 is driven as follows.

  With the cutting mechanism 100 in the initial state, the DC motor 104 at the start rotation position rotates in the positive direction. The intermittent gear 136 idles in the first rotation direction (the direction of arrow A1 in FIG. 4) without meshing with the cam drive gear 156. As shown in FIG. 6, the support member 168 maintains a state where it is stopped at the right end position of the movable range while being biased to the left by the coil springs 171 and 173. Accordingly, the cradle 180 maintains a state of stopping at the first facing position.

  As shown in FIGS. 9 and 10, the cam portion 215 rotates in the first direction (arrow B1 direction) simultaneously with the intermittent gear 136 in the start rotation position rotating in the first rotation direction. The housing member 272 moves backward from the front end position of the movable range. The cutting blade 275 moves rearward from the separation position (see FIG. 11A).

  Although not shown, the housing member 272 moving rearward contacts the large-diameter tube 9A from the front before the cutting blade 275. The accommodation member 272 is restricted from moving backward. When the DC motor 104 continues to rotate in the forward direction, the arm member 277 biases the cutting blade 275 (see FIG. 11) backward. The cutting blade 275 moves rearward relative to the housing member 272 against the urging force of a mounting spring (not shown).

  As shown in FIGS. 10 and 11, the blade portion 275A moves to the clamping position (see FIG. 11B). The clamping position in this example is an arrangement position of the cutting blade 275 in which the blade portion 275A sandwiches the large-diameter tube 9A with the contact surface 183. When the half-cut operation is performed, the cutting blade 275 in the clamping position sandwiches the large-diameter tube 9A with the first contact surface 181. A portion of the large-diameter tube 9A located between the blade portion 275A and the first contact surface 181 is elastically deformed and has a substantially oval shape that is long in the vertical direction when viewed from the left side.

  The rotation position of the link member 220 that has moved the cutting blade 275 to the clamping position is the clamping rotation position. When the half-cut operation is performed, the rotation position of the cam portion 215 that has rotated the link member 220 to the clamping rotation position is the first intermediate rotation position. In FIG. 10, the link member 220 at the clamping rotation position and the cam portion 215 at the first intermediate rotation position are illustrated by two-dot chain lines, respectively.

  When the cam portion 215 rotating in the first direction rotates from the initial rotation position to the first intermediate rotation position, the end surface of the left protrusion 212 in the first direction contacts the movable portion 242A of the intermediate position sensor 242. The intermediate position sensor 242 outputs an ON signal instead of the OFF signal. Thereby, CPU of the control board 19 (refer FIG. 2) can judge that the cam part 215 rotated to the 1st intermediate rotation position.

  As the DC motor 104 further continues to rotate in the positive direction for a predetermined time, the cam portion 215 rotates toward the first direction side from the first intermediate rotation position. The pressing pin 215A presses the first arm portion 231 counterclockwise when viewed from the left side. The first arm portion 231 is slightly separated downward from the locking piece 225, and the amount of elastic deformation of the torsion spring 235 increases. The torsion spring 235 biases the link member 220 in the third direction via the second arm portion 232 and the locking piece 227. Therefore, the cutting blade 275 is urged backward.

  Note that when the amount of elastic deformation of the torsion spring 235 increases during half-cutting, the pressing angle of the pressing pin 215A with respect to the first arm portion 231 is an acute angle. The pressing angle is a tangential direction (arrow D direction) of the pressing pin 215A with respect to a direction (arrow C direction) approaching the coil part 233 in the extending direction of the first arm part 231. The pressing angle when the half-cut operation is performed corresponds to the angle θ1 in FIG.

  The cutting blade 275 that is biased moves to the contact position (see FIG. 11C) while tearing the large-diameter tube 9A. The contact position is an arrangement position of the cutting blade 275 where the blade portion 275A contacts the contact surface 183. The contact position is the rear end position of the movable range of the cutting blade 275. When the half-cut operation is performed, the blade portion 275A that has moved to the contact position contacts each of the two contact planes 181A. The large-diameter tube 9A is half cut, leaving a portion that has entered the retreat groove 187 and retreated from the blade portion 275A. The blade portion 275A that has moved to the contact position faces the third surface 187C.

  The rotation position of the link member 220 that has moved the cutting blade 275 to the contact position is the contact rotation position. When the half-cut operation is performed, the rotation position of the cam portion 215 that has rotated the link member 220 to the contact rotation position is the first end rotation position. In FIG. 10, the link member 220 at the contact rotation position and the cam portion 215 at the first end rotation position are illustrated by solid lines. When the cam portion 215 rotates from the initial rotation position to the first end rotation position, the DC motor 104 stops rotating in the positive direction. When the cam portion 215 is at the first end rotation position, the left protruding portion 212 is in contact with the movable portion 242A.

  When the DC motor 104 stops rotating in the forward direction, the intermittent gear 136 stops rotating in the first rotating direction. When the half-cut operation is performed, the intermittent gear 136 rotates in the first rotation direction by the first predetermined rotation angle while the cutting blade 275 moves from the separated position to the contact position. The first predetermined rotation angle is smaller than the tooth portion non-forming angle. The first predetermined rotation angle in this example is 190 °. That is, while the cutting blade 275 moves from the separated position to the contact position, the intermittent gear 136 is idled without meshing with the cam drive gear 156.

  Note that while the cutting blade 275 moves from the separated position to the contact position, the right protrusion 211 rotates in the first direction without contacting the movable portion 241A of the initial position sensor 241. Accordingly, the initial position sensor 241 outputs an OFF signal while the cutting blade 275 moves from the separated position to the contact position.

  After completing the rotation in the forward direction, the DC motor 104 switches the rotation direction and rotates in the reverse direction. The cam portion 215 rotates in the second direction (the direction of arrow B2 in FIG. 10). The link member 220 rotates in the fourth direction (the direction of arrow B4 in FIG. 10) from the contact rotation position. The intermittent gear 136 rotates in the second rotation direction (arrow A2 direction in FIG. 4).

  When the cam portion 215 rotates to the initial rotation position (see FIG. 9) via the first intermediate rotation position, the link member 220 rotates to the separation rotation position via the clamping rotation position. The cutting blade 275 moves to the separation position (see FIG. 11A) via the clamping position (see FIG. 11B).

  The DC motor 104 continues to rotate in the reverse direction. With the link member 220 positioned at the separated position, the cam portion 215 rotates slightly in the second direction from the initial rotation position. The end surface in the second direction of the right protruding portion 211 is in contact with the movable portion 241A of the initial position sensor 241. The initial position sensor 241 outputs an ON signal instead of the OFF signal. The DC motor 104 switches the rotation direction and rotates again in the forward direction. When the cam portion 215 returns to the initial position, the right protruding portion 211 is separated from the movable portion 241A. The initial position sensor 241 outputs an OFF signal instead of the ON signal. Thereby, the CPU (not shown) of the control board 19 determines that the cam portion 215 has returned to the initial rotation position, and stops the rotation of the DC motor 104. At this time, the intermittent gear 136 returns to the start rotation position. With the above operation, the cutting mechanism 100 returns to the initial state after half-cutting the large-diameter tube 9A.

  The operation of the cutting mechanism 100 for half-cutting the small-diameter tube 9B will be described with reference to FIGS. The operation of half-cutting the small-diameter tube 9B is the same as the half-cut operation of the large-diameter tube 9A. Hereinafter, the description overlapping the half-cut operation of the large-diameter tube 9A will be simplified.

  With the cutting mechanism 100 in the initial state, the DC motor 104 rotates in the forward direction. The cradle 180 maintains a stopped state at the first facing position. When the cam portion 215 rotates from the initial rotation position to the first intermediate rotation position, the intermediate position sensor 242 outputs an ON signal instead of the OFF signal. At this time, the link member 220 rotates from the separation rotation position to the clamping rotation position, and the cutting blade 275 moves from the separation position (see FIG. 12A) to the clamping position (see FIG. 12B). The small diameter tube 9B is smaller than the large diameter tube 9A. Accordingly, the small-diameter tube 9B between the cutting blade 275 and the first contact surface 181 in the clamping position is only slightly elastically deformed.

  After the intermediate position sensor 242 outputs an ON signal, the DC motor 104 further rotates in the positive direction for a predetermined time. The cam portion 215 further rotates in the first direction from the first intermediate rotation position. The link member 220 further rotates in the third direction from the clamping rotation position, and biases the cutting blade 275 toward the first contact surface 181. The cutting blade 275 further presses the small diameter tube 9 </ b> B toward the first contact surface 181. The cutting blade 275 moves from the clamping position to the contact position while tearing the small diameter tube 9B. The small-diameter tube 9B is half-cut leaving a portion that has entered the retreat groove 187.

  After the cutting blade 275 moves to the contact position, the DC motor 104 stops rotating in the positive direction. Thereafter, the DC motor 104 rotates in the reverse direction by switching the rotation direction. The DC motor 104 performs the same rotation operation as that when the large-diameter tube 9A is half-cut. The cutting mechanism 100 returns to the initial state.

<3-2. Full cut operation of cutting mechanism 100>
The operation in which the cutting mechanism 100 fully cuts the large-diameter tube 9A will be described with reference to FIGS. 3, 4, 6 to 9, and 13 to 15. The outline of the full cut operation for the large-diameter tube 9A is as follows. The cutting mechanism 100 moves the cradle 180 from the first facing position to the second facing position, and sandwiches the large-diameter tube 9A between the second contact surface 182 and the cutting blade 275. When the cutting blade 275 presses the large-diameter tube 9A toward the second contact surface 182, the large-diameter tube 9A is fully cut. The DC motor 104 is driven as follows according to the drive control of the CPU (not shown) of the control board 19 (see FIG. 2).

  With the cutting mechanism 100 in the initial state, the DC motor 104 rotates in the reverse direction. The intermittent gear 136 at the start rotation position rotates in the second rotation direction (the direction of arrow A2 in FIG. 4). An end portion 136B of the first tooth portion 136A meshes with the second tooth portion 156A. The cam drive gear 156 is rotated in the third rotation direction (arrow A3 direction) by the intermittent gear 136.

  As shown in FIGS. 6 and 13, the cam member 158 is rotated in the third rotation direction by the cam drive gear 156. The sliding portion 172A that slides with the first cam surface 162A moves to the left against the urging force of the coil spring 173 while being positioned at the first rotational position. The support member 168 moves to the left against the urging force of the coil springs 171 and 173. The cradle 180 at the first facing position moves to the left.

  When the cam drive gear 156 is rotated by the second predetermined rotation angle by the intermittent gear 136, the sliding portion 172A is positioned at the first rotation position and the left end portion from the right end portion of the first cam surface 162A. Move up. The sliding member 172 moves by a distance L to the left end position of the movable range. Thereby, the support member 168 moves by the distance L to the left end position of the movable range. The cradle 180 moves by a distance L and moves to the second facing position. At this time, the first tooth portion 136A meshes with the second tooth portion 156A.

  The above-mentioned second predetermined rotation angle of the cam drive gear 156 is equal to the formation angle of the first cam surface 162A, and is 82 ° as an example. The intermittent gear 136 rotates the cam drive gear 156 by the second predetermined rotation angle by rotating by the third predetermined rotation angle. The third predetermined rotation angle is 48 ° as an example. That is, the tooth portion forming angle is larger than the third predetermined rotation angle.

  After the cradle 180 moves to the second facing position, the DC motor 104 continues to rotate in the reverse direction. The intermittent gear 136 further rotates in the second rotation direction, and the cam member 158 further rotates in the third rotation direction. The sliding portion 172A slides with the third cam surface 162C after moving to the right end portion of the first cam surface 162A relative to the cam member 158. The third cam surface 162C extends in parallel with the fourth rotation direction. Accordingly, the sliding portion 172A does not move to the left. In other words, the sliding portion 172A biased by the coil spring 173 is restricted from moving rightward by the third cam surface 162C. Therefore, the receiving stand 180 maintains the state located in a 2nd opposing position.

  As shown in FIG. 9, while the sliding portion 172A slides on the third cam surface 162C, the cam portion 215 rotates in the second direction (arrow B2 direction) from the initial rotation position to the specific rotation position. Immediately after the cam portion 215 starts to rotate in the second direction, the end surface of the right protruding portion 211 in the second direction comes into contact with the movable portion 241A. The initial position sensor 241 outputs an ON signal instead of the OFF signal. The DC motor 104 continues to rotate in the reverse direction, and the pressing pin 215A of the cam portion 215 urges the second arm portion 232 counterclockwise when viewed from the left side.

  The link member 220 rotates in the third direction from the separated rotation position. The housing member 272 moves backward. Although the cutting blade 275 moves backward from the separated position (see FIG. 15A), the housing member 272 moving backward contacts the large-diameter tube 9A from the front before the cutting blade 275. The accommodation member 272 is restricted from moving backward. When the DC motor 104 continues to rotate in the reverse direction, the arm member 277 biases the cutting blade 275 (see FIG. 15) backward. The cutting blade 275 moves rearward relative to the housing member 272 against the urging force of a mounting spring (not shown).

  As shown in FIGS. 14 and 15, the blade portion 275A moves to the clamping position (see FIG. 15B). When the full cut operation is performed, the cutting blade 275 in the clamping position sandwiches the large-diameter tube 9A with the second contact surface 182. A portion of the large-diameter tube 9A between the blade portion 275A and the second contact surface 182 is elastically deformed and becomes a substantially oval shape that is long in the vertical direction when viewed from the left side.

  The rotation position of the link member 220 that has moved the cutting blade 275 to the clamping position is the clamping rotation position described above. When the full cut operation is performed, the rotation position of the cam portion 215 that has moved the link member 220 to the clamping rotation position is the second intermediate rotation position. In FIG. 14, the link member 220 at the clamping rotation position and the cam portion 215 at the second intermediate rotation position are illustrated by two-dot chain lines, respectively.

  When the cam portion 215 rotating in the second direction rotates from the initial rotation position to the second intermediate rotation position, the end surface in the second direction of the left protruding portion 212 contacts the movable portion 242A of the intermediate position sensor 242. The intermediate position sensor 242 outputs an ON signal instead of the OFF signal. Thereby, CPU (not shown) of the control board 19 (refer FIG. 2) can judge that the cam part 215 rotated to the 2nd intermediate rotation position.

  When the DC motor 104 further rotates in the reverse direction for a predetermined time, the cam portion 215 rotates to the second direction side from the second intermediate rotation position. The pressing pin 215A presses the first arm portion 231 counterclockwise when viewed from the left side. The first arm portion 231 is slightly separated downward from the locking piece 225, and the amount of elastic deformation of the torsion spring 235 increases.

  When the amount of elastic deformation of the torsion spring 235 increases during the full cut operation, the pressing angle of the pressing pin 215A with respect to the first arm portion 231 is an obtuse angle. The pressing angle when the full cut operation is performed corresponds to the angle θ2 in FIG.

  The cutting blade 275 to be biased moves to the contact position (see FIG. 15C) while tearing the large diameter tube 9A. When the full cut operation is performed, the blade portion 275 </ b> A that has moved to the contact position contacts the second contact surface 182. The large diameter tube 9A is fully cut.

  The rotation position of the link member 220 that has moved the cutting blade 275 to the contact position is the contact rotation position described above. When the full cut operation is performed, the rotation position of the cam portion 215 that has moved the link member 220 to the contact rotation position is the second end rotation position. In FIG. 14, the link member 220 at the contact rotation position and the cam portion 215 at the second end rotation position are illustrated by solid lines. When the cam portion 215 is at the second end rotation position, the left protruding portion 212 is in contact with the movable portion 242A, and the right protruding portion 211 is in contact with the movable portion 241A. That is, the initial position sensor 241 and the intermediate position sensor 242 each output an ON signal.

  When the full cut operation is performed, the intermittent gear 136 rotates in the second rotation direction by the fourth predetermined rotation angle while the cutting blade 275 moves from the separated position to the contact position. The fourth predetermined rotation angle is smaller than the tooth formation angle. That is, even if the cutting blade 275 moves from the separated position to the contact position, the first tooth portion 136A and the second tooth portion 156A are kept engaged with each other. The fourth predetermined rotation angle in this example is 190 °.

  As shown in FIGS. 6 and 13, after the cam portion 215 (see FIG. 14) rotates to the second end rotation position, the DC motor 104 continues to rotate in the reverse direction. The sliding portion 172A slides with the second cam surface 162B after sliding with the end portion of the third cam surface 162C in the fourth rotation direction.

  When the sliding portion 172A slides with the second cam surface 162B, the sliding member 172 is biased by the coil spring 173 and moves to the right. The support member 168 moves to the right together with the sliding member 172. Thereby, the cradle 180 moves rightward from the second facing position.

  The sliding portion 172A that moves to the right contacts the right end portion of the first cam surface 162A after sliding with the second cam surface 162B. The sliding member 172 moves to the right by the distance L and moves to the right end position of the movable range. The support member 168 moves to the right by the distance L and moves to the right end position of the movable range. Thereby, the receiving stand 180 moves from the second facing position to the first facing position. The DC motor 104 stops rotating in the reverse direction. At this time, the first tooth portion 136A and the second tooth portion 156A are kept engaged with each other. The DC motor 104 switches the rotation direction and starts rotating in the forward direction.

  As shown in FIG. 8, when the DC motor 104 starts to rotate in the forward direction, the cam member 158 rotates in the fourth rotation direction. The second cam surface 162B rotating in the fourth rotation direction urges the sliding portion 172A in the clockwise direction when viewed from the left side. After the second cam surface 162B, the end portion of the specific cam surface 164 in the fourth rotational direction comes into contact with the sliding portion 172A. The sliding member 172 rotates to the second rotation position.

  While the specific cam surface 164 rotating in the fourth rotation direction slides on the sliding portion 172A, the support member 168 is restricted from moving rightward by the right plate 152B, and the slide member 172 is the right wall of the support member 168. Movement to the right is restricted by the portion 168B. Therefore, while the sliding portion 172A slides on the specific cam surface 164, the receiving stand 180 maintains a state of stopping at the first facing position.

  As shown in FIGS. 9 and 14, while the sliding portion 172A slides in the order of the second cam surface 162B and the specific cam surface 164, the cam portion 215 rotates in the first rotation direction from the second contact rotation position. To do. The cam portion 215 rotates from the second contact rotation position to the initial rotation position through the second intermediate rotation position and the specific rotation position in order. The link member 220 rotates from the contact rotation position to the separation rotation position via the clamping rotation position. The cutting blade 275 moves from the contact position to the separation position via the clamping position.

  When the right protruding portion 211 moves to the initial rotation position, the right protruding portion 211 moves away from the movable portion 242A. The initial position sensor 241 outputs an OFF signal instead of the ON signal. Thereby, the CPU (not shown) of the control board 19 can determine that the cam portion 215 has rotated to the initial rotation position. The DC motor 104 stops rotating in the positive direction. The cutting blade moving mechanism 200 returns to the initial state.

  As shown in FIG. 6, at the same time that the cam portion 215 returns to the initial rotation position, the sliding portion 172A moves from the end in the third rotation direction of the specific cam surface 164 to the right end of the first cam surface 162A. Move relative to 158. The cradle moving mechanism 120 returns to the initial state. By the above operation, the cutting mechanism 100 returns to the initial state after fully cutting the large-diameter tube 9A.

  In addition, since the operation | movement which carries out the full cut with respect to the small diameter tube 9B of the cutting mechanism 100 is the same as the full cut operation with respect to the large diameter tube 9A, description is abbreviate | omitted.

<4. Outline of Structure and Operation of Cutting Mechanism 500 as Modification>
With reference to FIGS. 16-24, the cutting mechanism 500 which is a modification of the cutting mechanism 100 is demonstrated. In the following description, members having the same functions as those in the above embodiment are denoted by the same reference numerals and description thereof is omitted. 20 illustrates a cross section of the cam portion 215 and the like cut by a virtual plane that passes through the axis of the rotation shaft portion 103 and extends in the left-right direction and the up-down direction in the cutting mechanism 500 (the same applies to FIG. 21). FIG. 22 shows the cam portion 215 in the initial rotation position and the link member 220 in the separated rotation position by a solid line, and shows the cam portion 215 in the first end rotation position and the link member 220 in the contact rotation position by a broken line. Yes. In FIG. 23, the cam portion 215 in the initial rotation position and the link member 220 in the separated rotation position are indicated by solid lines, and the cam portion 215 in the specific rotation position is indicated by broken lines. FIG. 24 shows the cam portion 215 at the specific rotation position and the link member 220 at the separated rotation position by a solid line, and shows the cam portion 215 at the second end rotation position and the link member 220 at the contact rotation position by a broken line. Yes.

  The printing apparatus 1 includes a cutting mechanism 500 instead of the cutting mechanism 100. The cutting mechanism 500 is provided between the left end of the tube mounting portion 40 (see FIG. 2) and the tube discharge port 16 (see FIG. 2). The cutting mechanism 500 is a mechanism that performs a cutting operation on the tube 9 after printing (see FIG. 16).

  As shown in FIGS. 16 and 17, the cutting mechanism 500 includes a positioning unit 190 (see FIG. 2), a drive unit 510, a cradle swinging mechanism 520 (see FIG. 17), and a cutting blade moving mechanism 200. That is, the cutting mechanism 500 is different from the cutting mechanism 100 in that it includes a drive unit 510 instead of the drive unit 110 and a cradle swinging mechanism 520 instead of the cradle moving mechanism 120. Therefore, the drive unit 510 and the cradle swing mechanism 520 will be described below. The drive unit 510 drives the cradle swing mechanism 520 and the cutting blade moving mechanism 200. The cradle swinging mechanism 520 is a mechanism that supports the cradle 180 so as to be swingable in the left-right direction around an axis extending in the front-rear direction. The link member 220 moves the cutting blade 275 between the separation position and the contact position by rotating the link shaft portion 223 about the rotation axis by a predetermined angle θ3.

<4-1. Drive unit 510>
The drive unit 510 will be described with reference to FIGS. 16 and 17. The drive unit 510 is provided below the tube conveyance path 9C. The drive unit 510 includes a support plate unit 502, a DC motor 104, and a gear group 105 (see FIG. 16). The drive unit 510 is different from the drive unit 110 in that it includes a support plate unit 502 instead of the support plate unit 102. The support plate portion 502 includes a first plate portion 502A and a second plate portion 502B. The first plate portion 502A is a plate-like body extending in the up-down direction and the front-rear direction. A first recess 502C (see FIG. 17) is formed in the first plate portion 502A. The first recessed portion 502C is recessed downward from the upper end portion of the first plate portion 502A and slightly rearward from the center portion in the front-rear direction. The first recess 502C penetrates the first plate portion 502A in the left-right direction. The second plate portion 502B is a plate-like body that extends rightward from the upper end portion of the first plate portion 502A. A plate body 99 (see FIG. 9) extending in the left-right direction and the front-rear direction is attached to the upper surface of the second plate portion 502B. A second recess 502D (see FIG. 17) is formed in the second plate portion 502B. The second recessed portion 502D is recessed rightward from the same position as the first recessed portion 502C in the left end portion of the second plate portion 502B and in the front-rear direction. The second recess 502D penetrates the second plate portion 502B in the vertical direction. Accordingly, the first recess 502C and the second recess 502D are formed in a row.

  The DC motor 104 is fixed to the front portion of the right surface of the first plate portion 502A. The output shaft of the DC motor 104 passes through the first plate portion 502A.

  Each of the gear groups 105 includes a plurality of gears rotatably provided on shaft portions extending leftward from the left surface of the first plate portion 502A. 16 and 17, some of the plurality of gears are not shown.

<4-2. Base swing mechanism 520>
The cradle swinging mechanism 520 will be described with reference to FIGS. 16 to 19 and FIGS. 22 to 24. As shown in FIGS. 16 and 17, the cradle swing mechanism 520 includes a cam surface 550 (see FIG. 17), auxiliary members 530 and 540, a rail member 590, a support portion 580, and a cradle 180. The cutting mechanism 500 includes auxiliary members 530 and 540 instead of the holding member 152. The cutting mechanism 500 includes a rail member 590 instead of the rail member 274 of the cutting mechanism 100.

<4-2-1. Cam surface 550>
As shown in FIG. 18, the cam surface 550 is a surface formed on the right surface of the rotating member 106 described above. The shape of the cam surface 550 is circular when viewed from the right side. The cam surface 550 can rotate around the rotation shaft portion 103 together with the first gear portion 109. The cam surface 550 includes a first surface 561, a second surface 562, a third surface 563, a first cam surface 551, a second cam surface 552, and a third cam surface 553. The first surface 561 is a surface extending in a direction perpendicular to the rotation shaft portion 103. The first surface 561 is annular when viewed from the right side, and has a predetermined width along a direction away from the vicinity of the rotation shaft portion 103 (hereinafter referred to as “separation direction”). The second surface 562 extends leftward from a part of the end portion in the separating direction of the first surface 561. The third surface 563 is provided at a position in the separation direction from the second surface 562. The third surface 563 is opposed to the second surface 562 across the gap in the rotational direction of the rotation shaft portion 103. The right end portion of the third surface 563 is connected to the right end portion of the first gear portion 109 in the direction opposite to the separating direction.

  The first cam surface 551 partially extends in the first direction (arrow B <b> 1 direction) around the rotation shaft portion 103 and extends from the left end portion of the second surface 562 to the left end portion of the third surface 563. The first cam surface 551 has a first end portion 551A (see FIG. 19) which is an end portion in the second direction (arrow B2 direction) and a second end portion 551B which is an end portion in the first direction.

  The second cam surface 552 extends from the second end portion 551 </ b> B to the right along the first direction in the periphery of the rotation shaft portion 103 while being inclined with respect to the first direction, and the left end portion of the second surface 562. To the left end of the third surface 563. The second cam surface 552 has a third end 552A that is an end in the second direction and a fourth end 552B that is an end in the first direction. The third end 552A is connected to the second end 551B.

  The third cam surface 553 extends in the first direction from the fourth end portion 552B to the upper portion of the first end portion 551A in the periphery of the rotation shaft portion 103, and among the end portions in the separation direction of the first surface 561, It extends from the end not connected to the second surface 562 to the left end of the third surface 563. The third cam surface 553 has a fifth end portion 553A that is an end portion in the second direction and a sixth end portion 553B that is an end portion in the first direction. The fifth end 553A is connected to the fourth end 552B. The sixth end 553B is connected to the first end 551A via a surface extending from the sixth end 553B to the first end 551A.

  The formation angles of the first cam surface 551, the second cam surface 552, and the third cam surface 553 will be described with reference to FIG. In the present modification, the first cam angle X1 that is the formation angle of the first cam surface 551 is 170 °. The first cam angle X1 is an angle extending along the first direction (arrow B1 direction) from the first end 551A to the second end 551B. The first cam angle X1 is not less than the first rotation angle X2. As shown in FIG. 22, the first rotation angle X2 is a rotation angle when the DC motor 104 rotates in the forward direction and the cam portion 215 rotates in the first direction from the initial rotation position to the first end rotation position. is there. In the present modification, the first rotation angle X2 is 150 °.

  In the present modification, the second cam angle Y1 that is the formation angle of the second cam surface 552 is 110 °. The second cam angle Y1 is an angle extending along the first direction from the third end 552A to the fourth end 552B. The second cam angle Y1 is equal to or smaller than the second rotation angle Y2. As shown in FIG. 23, the second rotation angle Y2 is obtained when the DC motor 104 rotates in the reverse direction and the cam unit 215 rotates in the second direction (arrow B2 direction) from the initial rotation position to the specific rotation position. The rotation angle. In the present modification, the second rotation angle Y2 is 120 °.

  In the present modification, the third cam angle Z1 that is the formation angle of the third cam surface 553 is 80 °. The third cam angle Z1 is an angle extending along the first direction from the fifth end 553A to the sixth end 553B. The third cam angle Z1 is equal to or greater than the third rotation angle Z2. As shown in FIG. 24, the third rotation angle Z2 is a rotation angle when the DC motor 104 rotates in the reverse direction and the cam portion 215 rotates in the second direction from the specific rotation position to the second end rotation position. is there. In the present modification, the third rotation angle Z2 is 77 °.

In this modification, the following formula (1) is established.
Second cam angle Y1 + third cam angle Z1 ≧ second rotation angle Y2 + third rotation angle Z2 (1)

<4-2-2. Auxiliary members 530, 540>
As shown in FIGS. 16 and 17, the auxiliary member 530 is provided between the link member 220 and the first plate portion 502A and above the second plate portion 502B, and is fixed to the plate body 99 (see FIG. 9). Is done. The auxiliary member 530 includes a lower plate portion 531, a front plate portion 532, a right plate portion 533 (see FIG. 17), and a left plate portion 534 (see FIG. 16).

  The lower plate portion 531 is a plate-like body having a substantially rectangular shape in plan view with the front-rear direction being the longitudinal direction. The front plate portion 532 is a plate-like body having a substantially rectangular shape in front view that extends upward from the front end portion of the lower plate portion 531. A hole 532 </ b> A is formed in a substantially central portion of the front plate portion 532. The right plate portion 533 extends upward from a right end portion of the lower plate portion 531 and a portion from the rear end portion to a slightly forward side from the center portion in the front-rear direction. The right plate portion 533 is a plate-like body having a rectangular shape in the right side view with the longitudinal direction being the front-rear direction. The left plate portion 534 extends upward from a left end portion of the lower plate portion 531 and a portion from the rear end portion to a substantially central portion in the front-rear direction. The left plate portion 534 is a substantially rectangular plate-like body in the left side view with the front-rear direction as the longitudinal direction.

  The auxiliary member 540 is provided on the rear side of the cradle 180 and is fixed to the plate 99 (see FIG. 9). The auxiliary member 540 includes a first plate portion 541, a second plate portion 542, and a third plate portion 543. The first plate portion 541 is a plate-like body that is substantially rectangular in front view with the vertical direction as the longitudinal direction. The first plate portion 541 extends from the upper end portion of the cradle 180 to a lower side than the lower end portion. In the first plate portion 541, a hole portion 541A (see FIG. 16) is formed in a portion below the lower end portion of the cradle 180. The second plate portion 542 and the third plate portion 543 are plate-like bodies that are substantially rectangular in a front view and extend rearward from the upper end portion and the lower end portion of the first plate portion 541, respectively.

<4-2-3. Rail member 590>
Rail member 590 is a cylindrical body extending in the front-rear direction. Rail member 590 is supported by holes 532A and 541A. Note that the housing member 272 is supported on the front portion of the rail member 590 so as to be movable in the front-rear direction.

<4-2-4. Support 580>
As shown in FIG. 17, the support portion 580 is supported by a rail member 590 so as to be swingable between the auxiliary member 530 and the auxiliary member 540 in the front-rear direction. In this modification, the support portion 580 is a plate-like body that supports the cradle 180. The support part 580 includes a loose insertion part 583, an upper extension part 581, and a lower extension part 582. The loose insertion portion 583 has a substantially rectangular frame shape with an opening on the right side in plan view. The loose insertion portion 583 has a pair of wall portions facing each other with a gap in the front-rear direction. A hole 583 </ b> A is formed in the front wall portion of the pair of wall portions of the loose insertion portion 583. A hole 583 </ b> B is formed in the rear wall portion of the pair of wall portions of the loose insertion portion 583. The rail member 590 is inserted through the holes 583A and 583B. The diameters of the holes 583A and 583B are slightly larger than the diameter of the rail member 590. Therefore, the support portion 580 can swing around the rail member 590 as a fulcrum.

  The upper extension portion 581 extends upward from the upper end of the rear portion of the loose insertion portion 583 and has a substantially rectangular shape in front view with the vertical direction as the longitudinal direction. The upper extension portion 581 has a cradle 180 fixed to the upper end portion.

  The lower extending portion 582 extends from the front lower end of the loose insertion portion 583 to the lower right and further extends downward. The lower extending portion 582 has a substantially rectangular shape in front view with the vertical direction as the longitudinal direction. The vertical length of the lower extension portion 582 is substantially equal to the distance from the lower end portion of the upper extension portion 581 to the upper end portion of the cradle 180. The lower extending portion 582 is inserted into the first recess 502C and the second recess 502D.

  A sliding portion 584 that protrudes to the left is provided at the lower end of the lower extending portion 582. That is, the sliding portion 584 is provided on the side of the support portion 580 opposite to the cradle 180 with respect to the rail member 590. The sliding portion 584 rotates with respect to the first cam surface 551 (see FIG. 18), the second cam surface 552 (see FIG. 18), and the third cam surface 553 (see FIG. 18) as the rotating member 106 rotates. Slide. The sliding portion 584 is biased leftward by a spring (not shown) provided in the hole 583A.

  According to the above configuration, when the sliding portion 584 slides with respect to the first cam surface 551, the cradle 180 is located at the first facing position. When the sliding portion 584 slides with respect to the third cam surface 553, the cradle 180 is located at the second facing position. The support portion 580 supports the receiving stand 180 so as to be swingable with respect to the positioning portion 190 on the downstream side in the tube conveyance direction with the rail member 590 as a fulcrum.

<4-2-5. Positional relationship of various members when cradle swinging mechanism 520 is in initial state>
The positional relationship among the cam surface 550, the support portion 580, the rail member 590, and the cradle 180 when the cradle swinging mechanism 520 having the above structure is in the initial state will be described with reference to FIGS. . When the cradle swinging mechanism 520 is in the initial state, the sliding portion 584 abuts on the first cam surface 551 in the vicinity of the second end portion 551B. At this time, as shown in FIG. 20, the imaginary line connecting the sliding portion 584, the rail member 590, and the cradle 180 substantially matches the vertical direction. Therefore, in the initial state, the cradle 180 is located at the first facing position.

<4-2-6. Outline of operation of cradle swing mechanism 520>
An outline of the operation of the cradle swing mechanism 520 will be described with reference to FIGS. 18, 20, and 21. In the cradle swing mechanism 520, the support portion 580 swings around the rail member 590 as the slide portion 584 slides with respect to the cam surface 550. Accordingly, the cradle swing mechanism 520 supports the cradle 180 so as to be swingable between the first facing position and the second facing position.

  When the cradle swinging mechanism 520 is in the initial state, when the DC motor 104 rotates in the forward direction, the cam surface 550 rotates in the first direction (the direction of the arrow B1). In this case, the sliding portion 584 slides with respect to the first cam surface 551 from the vicinity of the second end portion 551B to the vicinity of the first end portion 551A. Therefore, since the position of the sliding portion 584 in the left-right direction is not displaced, the support portion 580 does not swing with the rail member 590 as a fulcrum. That is, in this case, the cradle swinging mechanism 520 restricts the driving force of the DC motor 104 from being transmitted to the cradle 180, and maintains the state where the cradle 180 stops at the first facing position (see FIG. 20). .

  When the cradle swing mechanism 520 is in the initial state, when the DC motor 104 rotates in the reverse direction, the cam surface 550 rotates in the second direction (arrow B2 direction). In this case, the sliding portion 584 slides from the vicinity of the second end portion 551B to the sixth end portion 553B in the order of the first cam surface 551, the second cam surface 552, and the third cam surface 553. Therefore, the position of the sliding portion 584 in the left-right direction gradually shifts to the right. Along with this, the support portion 580 swings the cradle 180 leftward with the rail member 590 as a fulcrum. That is, in this case, the cradle swing mechanism 520 allows the driving force of the DC motor 104 to be transmitted to the cradle 180, and the cradle 180 is moved from the first facing position (see FIG. 20) to the second facing position (see FIG. 20). 21).

<5. Cutting operation of cutting mechanism 500>
Hereinafter, the cutting operation of the cutting mechanism 500 will be described separately for the half-cut operation of the tube 9 and the full-cut operation of the tube 9. Note that the movement of the cutting blade 275 by the cutting blade moving mechanism 200 is the same as that in the above embodiment, so it is simplified.

  The cutting mechanism 500 before starting the cutting operation is in an initial state. When the cutting mechanism 500 is in the initial state, the cradle swinging mechanism 520 is in the initial state, and the cutting blade moving mechanism 200 is in the initial state. When the cutting mechanism 500 is in the initial state, the tube 9 is positioned on the bottom wall portion 192 of the positioning portion 190 by the user.

<5-1. Half-cut operation of cutting mechanism 100>
A half-cut operation for the tube 9 will be described. With the cutting mechanism 500 in the initial state, the DC motor 104 rotates in the positive direction. Thereby, the rotation member 106 rotates in the first direction (arrow B1 direction). As the rotation member 106 rotates in the first direction, the cam surface 550 and the cam portion 215 rotate in the first direction.

  As the cam surface 550 rotates in the first direction, the sliding portion 584 slides with respect to the first cam surface 551. Therefore, since the position of the sliding part 584 in the left-right direction is not displaced, the support part 580 maintains the state where the receiving stand 180 is stopped at the first facing position.

  On the other hand, the cam portion 215 rotates from the initial rotation position to the first end rotation position via the first intermediate rotation position by rotating in the first direction. Thereby, the cutting blade 275 moves to the contact position (see FIG. 11C) and half-cuts the tube 9.

  Note that the first cam angle X1 is equal to or greater than the first rotation angle X2, and the sliding portion 584 contacts the vicinity of the second end portion 551B of the first cam surface 551 in the initial state. Therefore, while the sliding portion 584 slides on the first cam surface 551, the cam portion 215 can rotate from the initial rotation position to the first end rotation position via the first intermediate rotation position. That is, the link member 220 can move the cutting blade 275 from the separated position to the contact position while the sliding portion 584 slides on the first cam surface 551.

  As described above, the cutting mechanism 500 performs the half-cut operation of the tube 9 by moving the cutting blade 275 to the contact position while maintaining the state where the cradle 180 is stopped at the first facing position. After the half-cut operation is completed, the DC motor 104 rotates in the reverse direction, so that the cutting mechanism 500 returns to the initial state.

<5-2. Full cut operation of cutting mechanism 500>
A full cut operation for the tube 9 will be described. With the cutting mechanism 500 in the initial state, the DC motor 104 rotates in the reverse direction. Thereby, the rotating member 106 rotates in the second direction (arrow B2 direction). As the rotating member 106 rotates in the second direction, the cam surface 550 and the cam portion 215 rotate in the second direction.

  As the cam surface 550 rotates in the second direction, the sliding portion 584 slides from the first cam surface 551 to the third cam surface 553 via the second cam surface 552. Therefore, the position of the sliding portion 584 in the left-right direction is displaced to the right. Along with this, the support portion 580 swings the cradle 180 leftward with the rail member 590 as a fulcrum, and swings from the first facing position to the second facing position.

  On the other hand, the cam portion 215 rotates from the initial rotation position to the specific rotation position by rotating in the second direction. In this case, since the pressing pin 215A is separated from the second arm portion 232, the link member 220 does not rotate.

  Note that the second cam angle Y1 is equal to or smaller than the second rotation angle Y2, and the sliding portion 584 contacts the vicinity of the second end portion 551B of the first cam surface 551 in the initial state. Therefore, while the cam portion 215 rotates from the initial rotation position to the specific rotation position, the sliding portion 584 slides from the first cam surface 551 to the third cam surface 553 via the second cam surface 552. That is, the cradle 180 swings from the first facing position to the second facing position while the cam portion 215 rotates from the initial rotation position to the specific rotation position. Specifically, when the cam portion 215 is at the specific rotation position, the sliding portion 584 comes into contact with the third cam surface 553 in the vicinity of the fifth end portion 553A.

  The cam portion 215 at the specific rotation position further rotates in the second direction, thereby rotating from the specific rotation position to the second end rotation position via the second intermediate rotation position. Thereby, the cutting blade 275 moves to the contact position and cuts the tube 9.

  Note that when the third cam angle Z1 is equal to or greater than the third rotation angle Z2 and the cam portion 215 is at the specific rotation position, the sliding portion 584 has the fifth end portion 553A of the third cam surface 553. Abuts in the vicinity. Therefore, while the sliding portion 584 slides on the third cam surface 553, the cam portion 215 can rotate from the specific rotation position to the second end rotation position via the second intermediate rotation position. That is, the link member 220 can move the cutting blade 275 from the separated position to the contact position while the sliding portion 584 slides on the third cam surface 553.

  As described above, the cutting mechanism 500 swings the cradle 180 from the first facing position to the second facing position, and then keeps the cutting blade 275 in the contact position while maintaining the second facing position. 9 full cut operation is performed. After the full cut operation is completed, the DC motor 104 rotates in the forward direction, so that the cutting mechanism 500 returns to the initial state.

<6. Example of effects of the present disclosure>
As described above, when the DC motor 104 rotates in the forward direction while the cutting mechanism 500 is in the initial state, the blade portion 275 </ b> A sandwiches the tube 9 between the first contact surface 181. Thereby, the cutting mechanism 500 half-cuts the tube 9. On the other hand, when the DC motor 104 rotates in the reverse direction while the cutting mechanism 500 is in the initial state, the blade portion 275A sandwiches the tube 9 with the second contact surface 182. Thereby, the cutting mechanism 500 fully cuts the tube 9. The cutting mechanism 500 can switch the cutting operation on the tube 9 to half cut or full cut only by switching the rotation direction of the DC motor 104. The cutting mechanism 500 can be half-cut and full-cut only by having the cutting blade 275, the cradle 180, and the DC motor 104 that is a drive source. Therefore, the cutting mechanism 500 can perform a half cut and a full cut with a simple configuration. In other words, the printing apparatus 1 includes the cutting mechanism 500, so that half-cutting and full-cutting can be performed with a simple configuration.

  Further, when the DC motor 104 rotates in the forward direction from the state in which the cutting mechanism 500 is in the initial state, the sliding portion 584 moves to the first cam surface 551 in conjunction with the rotation of the cam portion 215 in the first direction. Continue to slide against. That is, the horizontal position of the sliding portion 584 is not displaced. Thereby, the cradle swinging mechanism 520 restricts the driving force of the DC motor 104 from being transmitted to the cradle 180, and maintains the state where the cradle 180 stops at the first facing position. In this case, the link member 220 is rotated by a predetermined angle θ3 by the cam portion 215 to move the cutting blade 275 from the separated position to the contact position.

  Note that the first cam angle X1 is equal to or greater than the first rotation angle X2, and the sliding portion 584 contacts the vicinity of the second end portion 551B of the first cam surface 551 in the initial state. Therefore, while the sliding portion 584 slides on the first cam surface 551, the cam portion 215 can rotate from the initial rotation position to the first end rotation position via the first intermediate rotation position. That is, the link member 220 can move the cutting blade 275 from the separated position to the contact position while the sliding portion 584 slides on the first cam surface 551. Thereby, the cutting | disconnection mechanism 500 can perform a half cut operation | movement stably.

  On the other hand, when the DC motor 104 rotates in the reverse direction from the state in which the cutting mechanism 500 is in the initial state, the sliding portion 584 is coupled to the first cam surface 551 in conjunction with the rotation of the cam portion 215 in the second direction. The second cam surface 552 and the third cam surface 553 slide in this order. That is, the sliding part 584 moves to the right. In this case, the cradle swing mechanism 520 allows the driving force of the DC motor 104 to be transmitted to the cradle 180, and the support portion 580 swings with the rail member 590 as a fulcrum, thereby Swing from the first facing position to the second facing position. When the sliding portion 584 slides with respect to the second cam surface 552, the pressing pin 215 </ b> A is separated from the link member 220. For this reason, the link member 220 does not move the cutting blade 275.

  Note that the second cam angle Y1 is equal to or smaller than the second rotation angle Y2, and the sliding portion 584 contacts the vicinity of the second end portion 551B of the first cam surface 551 in the initial state. Therefore, while the cam portion 215 rotates from the initial rotation position to the specific rotation position, the sliding portion 584 slides from the first cam surface 551 to the third cam surface 553 via the second cam surface 552. That is, the cradle 180 can swing from the first facing position to the second facing position while the cam portion 215 rotates from the initial rotation position to the specific rotation position.

  The link member 220 is rotated by a predetermined angle θ3 by the cam portion 215 after the sliding portion 584 slides with respect to the third cam surface 553 and the cradle 180 swings to the second facing position. Thereby, the link member 220 moves the cutting blade 275 from the separated position to the contact position.

  Note that when the third cam angle Z1 is equal to or greater than the third rotation angle Z2 and the cam portion 215 is at the specific rotation position, the sliding portion 584 has the fifth end portion 553A of the third cam surface 553. Abuts in the vicinity. Therefore, while the sliding portion 584 slides on the third cam surface 553, the cam portion 215 can rotate from the specific rotation position to the second end rotation position via the second intermediate rotation position. That is, the link member 220 can move the cutting blade 275 from the separated position to the contact position while the sliding portion 584 slides on the third cam surface 553. Thereby, the cutting | disconnection mechanism 500 can perform a full cut stably.

  In this modification, the formula (1) is established. That is, the rotation angle (second rotation angle Y2 + third rotation angle Z2) at which the cam portion 215 rotates from the initial rotation position to the second end rotation position is the second direction from the third end portion 552A to the sixth end portion 553B. It is smaller than the formation angle (second cam angle Y1 + third cam angle Z1) that extends along. Therefore, when the DC motor 104 rotates in the reverse direction from the state where the cutting mechanism 500 is in the initial state, the link member 220 is surely received while the sliding portion 584 is sliding with respect to the third cam surface 553. Can move the cutting blade 275 from the separated position to the contact position.

  Further, the cradle 180 and the cutting blade 275 are moved by a DC motor 104, which is a driving source, a link member 220, and a cam portion 215 provided with a cam surface 550, respectively. That is, the driving force of the DC motor 104 is transmitted to the cradle 180 and the cutting blade 275 via the cam portion 215 provided with the cam surface 550 as one member. Therefore, since the cradle swinging mechanism 520 and the cutting blade moving mechanism 200 are easily synchronized, the cutting mechanism 500 can stably switch between the half cut and the full cut.

  Further, the support portion 580 supports the cradle 180 on the downstream side in the tube conveyance direction with respect to the positioning portion 190 so as to be swingable with the rail member 590 as a fulcrum. Therefore, the cutting mechanism 500 can suppress the cradle 180 from interfering with the positioning unit 190.

  Further, when the DC motor 104 rotates in the forward direction, the cutting mechanism 500 maintains the state where the cradle 180 stops at the first facing position, and the cradle 180 at the first facing position and the blade portion 275A. The tube 9 is sandwiched between them and cut. Therefore, when half-cutting, since the cradle 180 does not move with respect to the blade portion 275A, the cutting mechanism 500 can stably perform the half-cut operation.

  Further, when the cutting blade 275 moves between the separation position and the contact position, the rail member 590 guides the movement of the storage member 272 in the front-rear direction and supports the support portion 580 so as to be swingable. Therefore, the rail member 590 which is one member can guide the movement of the cutting blade 275 and support the support portion 580. Therefore, the cutting mechanism 500 can be reduced in size with fewer parts. Further, since the swing fulcrum of the support portion 580 is located on the extension line of the moving shaft of the housing member 272, the position of the cutting blade 275 housed in the housing member 272 is less likely to shift.

<7. Other>
In the above modification, the cutting mechanism 500 is an example of the “cutting device” of the present invention. The retreat groove 187 is an example of the “concave portion” in the present invention. The DC motor 104 is an example of the “motor” in the present invention. The tube 9 is an example of the “cutting object” in the present invention. The rail member 590 is an example of the “first fulcrum portion” in the present invention. The link member 220 is an example of the “first rotating member” in the present invention. The pressing pin 215A is an example of the “pressing portion” in the present invention. The initial rotational position is an example of the “initial position” in the present invention. The first end rotation position is an example of the “first end position” in the present invention. The specific rotation position is an example of the “intermediate position” in the present invention. The second end rotation position is an example of the “second end position” in the present invention. The first direction is an example of the “first rotation direction” in the present invention. The second direction is an example of the “second rotational direction” in the present invention. The cam portion 215 is an example of the “second rotating member” in the present invention. The right direction is an example of the “predetermined direction” in the present invention. The first cam surface 551 is an example of the “first cam surface” in the present invention. The second cam surface 552 is an example of the “second cam surface” in the present invention. The third cam surface 553 is an example of the “third cam surface” in the present invention. The cam surface 550 is an example of the “cam surface” in the present invention. The sliding portion 584 is an example of the “sliding portion” in the present invention. The tube conveyance direction is an example of the “specific direction” in the present invention. The positioning unit 190 is an example of the “guide unit” in the present invention. The print head 61 is an example of the “printing unit” in the present invention. The movable conveyance roller 62 is an example of the “supplying unit” in the present invention.

  The cutting mechanism 500 is not limited to the above modification. For example, the cutting mechanism 500 may include a support portion 580 having the second fulcrum portion 600. As shown in FIG. 25, the support portion 580 includes a second fulcrum portion 600 at the end of the upper extension portion 581 opposite to the side supported by the rail member 590. Note that FIG. 25 shows the cradle 180, the rail member 590, and the support member 580 in the first opposing position with the solid line, and the cradle 180, the rail member 590, and The upper extending portion 581 of the support portion 580 is indicated by a two-dot chain line. The support portion 580 supports the cradle 180 in a swingable manner above the center of gravity G of the cradle 180. Thus, when the support 180 swings between the first facing position and the second facing position with the rail member 590 as a fulcrum by the support portion 580, the cradle 180 swings by its own weight with the second fulcrum portion 600 as a fulcrum. Therefore, the cradle 180 tends to maintain the same angle with respect to the horizontal plane. As a result, the blade portion 275A easily contacts the contact surface 183 at the same angle regardless of whether the cradle 180 is in the first facing position or the second facing position. Therefore, the cutting mechanism 500 can stably perform a half cut and a full cut on the tube 9.

  When the cradle 180 is in the first facing position, the second contact surface 182 may face the blade portion 175A, and when the cradle 180 is in the second facing position, the first contact surface 181 may face the blade portion 175A. In this case, when performing the full cut operation, the cutting mechanism 500 moves the cutting blade 275 from the separated position to the contact position while maintaining the state where the cradle 180 is stopped at the first facing position. Therefore, the cutting mechanism 500 can stably perform a full cut operation.

  The driving source of the cutting blade moving mechanism 200 and the cradle swing mechanism 520 is not limited to the DC motor 104, and may be a stepping motor, for example.

DESCRIPTION OF SYMBOLS 1 Printing apparatus 9 Tube 61 Print head 62 Movable conveyance roller 104 DC motor 160 Cam part 180 Base 183 Contact surface 190 Positioning part 215 Cam part 215A Press pin 220 Link member 275 Cutting blade 500 Cutting mechanism 520 Base swing mechanism 550 Cam Surface 580 Support portion 584 Sliding portion 590 Rail member 600 Second fulcrum portion G Center of gravity X1 First cam angle X2 First rotation angle Y1 Second cam angle Y2 Second rotation angle Z1 Third cam angle Z2 Third rotation angle θ3 Predetermined angle

Claims (6)

A cutting blade having a blade portion;
A cradle having a contact surface with which the blade part can come into contact, wherein the contact surface has a first contact surface in which two parts contacting the blade part are arranged across a recess, and a part contacting the blade part A cradle including a continuous second contact surface;
A motor rotating in the forward and reverse directions;
A mechanism for movably supporting the cutting blade, wherein in each case the motor rotates in the forward direction and the reverse direction, the cutting blade is connected to the blade in conjunction with the rotation of the motor. A cutting blade moving mechanism that moves between a separation position that is separated from the contact surface and a contact position at which the blade portion contacts the contact surface;
A support portion that supports the cradle and a first fulcrum portion that supports the support portion in a swingable manner, and the support portion swings with the first fulcrum portion as a fulcrum in conjunction with rotation of the motor; By moving, the first contact surface and the second contact are moved from the first facing position where one of the first contact surface and the second contact surface faces the blade portion. The mechanism is a mechanism that swings to the second facing position where the other of the faces faces the blade portion, and when the motor rotates in the forward direction, the driving force of the motor is transmitted to the cradle. While maintaining the state where the cradle stops at the first facing position, the driving force is allowed to be transmitted to the cradle when the motor rotates in the reverse direction. The support portion swings around the first fulcrum portion as a fulcrum, Serial cutting device being characterized in that a cradle swing mechanism for swinging to the second opposed position from the first opposed position. The cutting blade moving mechanism is
A first rotating member that moves the cutting blade between the separation position and the contact position by rotating a predetermined angle in each case where the motor rotates in the forward direction and the reverse direction;
A pressing portion capable of rotating the first rotating member by pressing the first rotating member, and in conjunction with the rotation of the motor, an initial position, a first end position, an intermediate position, and a first A member that is rotatable to a second end position, and in conjunction with the rotation of the motor in the positive direction, while rotating the first rotation angle in the first rotation direction from the initial position to the first end position, The first rotation member is rotated by the predetermined angle by pressing the first rotation member with a portion, and the first rotation direction from the initial position to the intermediate position is interlocked with the rotation of the motor in the reverse direction. When the second rotation angle is rotated in the second rotation direction opposite to the first rotation member, the pressing portion is separated from the first rotation member, and in conjunction with the rotation of the motor in the reverse direction, The second rotation method to the end position While rotating the third rotating angle, and a second rotary member for said predetermined angle of said first rotary member by pressing said first rotary member by the pressing portion,
The cradle swing mechanism is
Of the second rotating member, a cam surface formed on a surface intersecting with a predetermined direction in which a shaft portion serving as a rotation center extends, and extending in the first rotating direction, and a first end portion in the second rotating direction. And a first cam surface having a second end portion in the first rotation direction, and extending from the second end portion in the predetermined direction along the first rotation direction so as to be inclined with respect to the first rotation direction. A second cam surface having a third end in the second rotational direction and a fourth end in the first rotational direction, extending from the fourth end in the first rotational direction, and extending in the second rotational direction. A cam surface including a fifth end portion and a third cam surface having a sixth end portion in the first rotational direction;
A portion of the support portion that is provided on a side opposite to the cradle with respect to the first fulcrum portion and that slides with respect to the cam surface, and that slides with respect to the first cam surface. A sliding portion for positioning the cradle at the first opposing position when moving and locating the cradle at the second opposing position when sliding relative to the third cam surface; With
A first cam angle that is a formation angle extending from the first end portion to the second end portion along the first rotation direction is equal to or greater than the first rotation angle,
A second cam angle, which is a formation angle extending along the first rotation direction from the third end portion to the fourth end portion, is equal to or less than the second rotation angle;
The third cam angle, which is a formation angle extending along the first rotation direction from the fifth end portion to the sixth end portion, is equal to or greater than the third rotation angle. Cutting device. A guide unit for guiding a cutting object in a specific direction with respect to the cradle;
The cutting blade in the separated position sandwiches the cutting object guided by the guide portion between the contact surface,
The cutting device according to claim 1, wherein the support portion supports the cradle on the specific direction side of the guide portion. The one surface is the first contact surface;
The cutting device according to any one of claims 1 to 3, wherein the other surface is the second contact surface.   5. The cutting according to claim 1, wherein the support portion includes a second fulcrum portion that supports the cradle so as to be swingable above a position of the center of gravity of the cradle. apparatus. A cutting device according to any of claims 1 to 5,
Printing means for printing the object to be cut;
A printing apparatus comprising: a supply unit that supplies the cutting object printed by the printing unit to the cutting device.

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