JP2017081621A - Packaging device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a packaging device capable of replacing a heating unit while holding the heating unit at a replacement position even when a power source is turned off.SOLUTION: A first lock mechanism 530 is provided at the center of a base part 520 in a left-right direction. A second lock mechanism 560 is provided at the center of a base part 550 in the left-right direction. The first lock mechanism 530 is provided with a connection member 531, and the second lock mechanism 560 is provided with a connection member 561. The connection member 531 connects the base part 520 and a fixing part 472 to lock a vertical motion of the fixing part 472 at a position where a first heating unit 445 is raised to a first proximity position. Further, the connection member 561 connects the base part 550 and the fixing part 472 to lock the vertical motion of the fixing part 472 at a position where a second heating unit 495 is raised to a second proximity position.SELECTED DRAWING: Figure 17

Description

  The present invention relates to a packaging device that covers at least a part of an article with a film.

  There has been proposed a packaging apparatus that covers and wraps a part of an article with a film while the article is placed on a plate-like pedestal. For example, in the case of the packaging apparatus described in Patent Document 1, a heating unit is provided that can move between a position separated from the conveyance path of the pedestal and a position close thereto. The heating unit includes a heater and a biasing unit that biases the heater upward toward the transport path. The heating unit moves from a position separated from the conveyance path to a position close to the heating path, thereby sandwiching the film between the heating unit and the base. The film is melted by the heater of the heating unit and welded to the pedestal. After the film is welded to the pedestal, the heating unit moves to a position away from a position close to the conveyance path. By performing the above steps on the upstream side and the downstream side in the conveyance direction of the pedestal, films are welded to the upstream side and the downstream side of the pedestal, respectively. Thereby, the article on the pedestal is packaged by the film.

JP 2014-97838 A

  In the invention described in Patent Document 1, when the packaging device is used repeatedly, the heater of the heating unit may be deteriorated. For example, foreign matter may adhere to the contact surface of the heater with the film, which may reduce the accuracy of film welding. Therefore, it may be necessary to replace the heating unit. When replacing the heating unit, it is necessary to raise the heating unit to the replacement position. When the heater of the heating unit is energized, the heater is in a heated state, so it is necessary to turn off the power of the packaging device. When the power of the packaging device is turned off, the driving force of the motor that moves the heating unit up and down is cut off, so that the heating unit cannot be held at the replacement position.

  Moreover, in the invention described in Patent Document 1, the heating unit is biased in the pedestal direction by a spring and is pressed against the pedestal via the film to weld the film to the pedestal. The heating unit can swing in the direction orthogonal to the transport direction of the pedestal with respect to the holding unit of the heating unit, but cannot swing in the transport direction of the pedestal. Due to the tension of the film, the front end and the rear end in the conveying direction may be lifted upward and deformed. In this case, there is a problem that the heating unit cannot follow the deformation of the pedestal and the film cannot be welded to the pedestal.

  A first object of the present invention is to provide a packaging device that can replace a heating unit by holding the heating unit at an exchange position even when the power is turned off. A second object is to provide a packaging device in which a heating unit follows the deformation of a pedestal and can reliably weld a film as a heated object to the pedestal.

  The packaging device according to the present invention is a packaging device that wraps a pedestal and an article placed on the pedestal with a film, a transport mechanism that transports the pedestal on which the article is placed, and the film. A guiding member that is movable along a moving path that intersects a conveying path through which the pedestal conveyed by the conveying mechanism passes and extends in a vertical direction; and a lower side of the pedestal by the guiding member An exchange unit provided with a heating unit for heating the film guided to the surface, a fixing part to which the exchange unit is detachably fixed, a heating position for heating the film by the heating unit, and an escape from the heating position. A moving mechanism that moves the replacement unit to and from the retracted position, and the moving mechanism fixes the replacement unit to a replaceable position where the replacement unit can be replaced. In a state but which it is moved, characterized by comprising a lock mechanism for locking the fixing unit.

  According to the present invention, in the packaging device, the locking mechanism locks the fixing portion when the fixing portion is moved to the replacement position where the heating unit can be replaced. Therefore, even when the power of the packaging device is turned off, the fixing unit is fixed and the heating unit can be easily replaced without lowering the heating unit. Moreover, it is not necessary to replace the heating unit that is energized and heated.

  The moving mechanism may include a base portion that supports the fixed portion so as to be movable, and the locking mechanism may include a connecting member that connects the base portion and the fixing portion. In this case, since the base portion and the fixing portion are connected by the connecting member of the lock mechanism, the replacement unit can be fixed with a simple structure. Further, the fixing portion can be fixed even when the power is turned off.

  And a control device for controlling the packaging device, wherein the control device determines whether or not a maintenance mode in which the replacement unit can be replaced is selected, and determines that the maintenance mode is selected. May move the replacement unit to the replacement position by the moving mechanism to turn off the power of the packaging device. In this case, when the maintenance mode is selected, the control device moves the replacement unit to the replacement position by the moving mechanism. Thereafter, if the fixing part is fixed by the lock mechanism, even if the power of the packaging device is turned off, the fixing part is fixed and the replacement unit can be easily replaced without lowering.

  The packaging device includes at least one of a first position sensor that detects a position of the replacement unit and a second position sensor that detects a position of the lock mechanism, and a display device that displays various types of information. When the power of the apparatus is turned on, the control device enables the replacement unit to move to the retracted position by the moving mechanism, and the replacement unit has moved to the retracted position by the first position sensor. When the change unit is not detected, and when the second position sensor does not detect that the position of the lock mechanism is not at the position for fixing the fixing portion, the replacement unit is moved to the retracted position. It may be determined that the error state has not been moved to, and an error may be displayed on the display device. In this case, when the replacement unit is replaced and the packaging device is powered on, the control device moves the replacement unit to the retracted position. In this case, the first position sensor does not detect that the replacement unit has moved to the retracted position, and the second position sensor does not detect that the position of the lock mechanism is not at the position for locking the fixing portion. In at least one of the cases, the fixing portion may remain fixed by the lock mechanism, so that an error can be displayed on the display device and a warning can be given to the operator.

  Further, the replacement unit includes a holding unit that holds the heating unit, and between the holding unit and the heating unit, the heating unit is urged toward the conveyance path along which the pedestal is conveyed. A biasing member is provided, and the heating unit includes a first outer surface formed in an intersecting direction intersecting the transport path and a second outer surface facing the first outer surface, and the first outer surface is in the intersecting direction. The second outer surface is provided with a third protrusion and a fourth protrusion with a predetermined interval in the intersecting direction, and the holding part is A first support plate facing the first outer surface and a second support plate facing the second outer surface are provided, and the first support plate moves the first protrusion and the second protrusion in the vertical direction. A first guide hole and a second guide hole are provided to guide each possible. , Wherein the second support plate, the third guide hole and the fourth guide hole for each movably guided the third protrusion and the fourth protrusion in the vertical direction is provided. In this case, the heating unit includes a first protrusion and a second protrusion on the first outer surface, a third protrusion and a fourth protrusion on the second outer surface, and the first support plate of the holding portion includes The first guide hole and the second guide hole are provided, and the second support plate is provided with the third guide hole and the fourth guide hole. It can swing in any direction. Therefore, it is possible to follow the deformation of the base in any direction.

  Further, a gap between the first guide hole and the first protrusion in a direction intersecting a guide direction in which the first guide hole guides the first protrusion is defined as a first gap, and the second guide hole is A guide direction in which the gap between the second guide hole and the second projection in a direction intersecting the guide direction for guiding the second projection is defined as a second gap, and the third guide hole guides the third projection. The fourth guide in the direction intersecting the guide direction in which the fourth guide hole guides the fourth protrusion is defined as a third gap. When the gap between the hole and the fourth protrusion is the fourth gap, any one of the first to fourth gaps is narrower than the other three gaps, and constitutes the one gap. A guide hole may regulate the position of the heating unit. In this case, in order to regulate the position of the heating unit, the accuracy of the gap between at least one guide hole and one protrusion is sufficient, and the degree of freedom in the accuracy of the gap between other guide holes and the protrusion is not limited. Rise.

It is a perspective view of packaging device 1 (state where case 800 was equipped). It is a perspective view of packaging device 1 (state which removed case 800). 4 is a perspective view of a guide member 39. FIG. 7 is a perspective view of a heating mechanism 86. FIG. It is a perspective view of the 1st heater movement mechanism 430 in a 1st separation position. It is a perspective view of the 1st heater moving mechanism 430 in a 1st proximity position. It is a perspective view of the 1st exchange unit 440 seen from the downstream. It is a perspective view of the 1st exchange unit 440 seen from the upstream. It is a perspective view of the 1st heating unit 445 seen from the downstream side. It is a perspective view of the 1st heating unit 445 seen from the upper left. It is a perspective view of heating mechanism 86 showing the state where the 1st exchange unit 440 and the 2nd exchange unit 490 are not locked. 5 is a perspective view of a connecting member 531. FIG. FIG. 6 is a perspective view of a connecting member 561. 6 is a plan view of a heating mechanism 86. FIG. It is sectional drawing of the base 520 seen in the arrow direction in the CC line | wire shown in FIG. It is sectional drawing of the base 550 seen in the arrow direction in the BB line shown in FIG. It is a perspective view of heating mechanism 86 showing the state where the 1st exchange unit 440 and the 2nd exchange unit 490 are locked. 4 is a perspective view of a rotation suppression mechanism 80. FIG. It is a figure which shows the packaging process by a packaging process. 2 is a block diagram showing an electrical configuration of the packaging device 1. FIG. It is a flowchart of a maintenance process. It is a flowchart of a power-on process. It is a figure explaining the deformation | transformation of the conveyance direction of the base. It is a figure explaining the deformation | transformation of the left-right direction of the base.

  Embodiments of the present invention will be described below with reference to the drawings. As shown in FIG. 1, the packaging apparatus 1 covers the article 3 placed on a base 2 such as a mount with a film 24 and fixes the article 3 to the base 2 to wrap the article 3. Hereinafter, packaging the article 3 in this manner is referred to as “packing the base 2 and the article 3”. The packaging device 1 conveys the pedestal 2 on which the article 3 is placed from the lower right side of FIG. 1 toward the upper left side, and wraps the pedestal 2 and the article 3. The upper side, the lower side, the left diagonally lower side, and the right diagonal upper side in FIG. The diagonally lower right side and the diagonally upper left side in FIG. 1 are referred to as upstream and downstream in the transport direction, respectively.

<Case 800>
As shown in FIG. 1, the packaging device 1 includes a housing 800. The shape of the housing 800 is a substantially rectangular parallelepiped whose longitudinal direction is the vertical direction. The housing 800 includes an upper housing 801 and a lower housing 803. The upper housing 801 includes two standing portions 802A and a erection portion 802B. The two standing portions 802A extend upward from both left and right end portions of the lower housing 803, respectively. The erection part 802B is erected between the upper ends of the two erection parts 802A. A display unit 207 capable of displaying various types of information is provided on the right standing unit 802A.

  The two standing portions 802A cover side plate members 111 and 112 (see FIG. 2) described later from the right side and the left side, respectively. The erection part 802B covers a film roll 22 (see FIG. 2) described later from above. A portion surrounded by the lower housing 803, the two standing portions 802A, and the erection portion 802B forms an internal space of the housing 800. The internal space of the housing 800 communicates with the outside of the housing 800 through openings 805 formed on the upstream side and the downstream side of the housing 800. The shape of the lower housing 803 is a substantially rectangular parallelepiped with the left-right direction as the longitudinal direction. An operation unit 206 for the user to instruct the packaging apparatus 1 to start or stop the packaging operation is provided in the lower casing 803.

<Receivers 12, 13>
The cradle 12 extends in the horizontal direction from the upper end of the upstream side surface of the lower housing 803 toward the upstream side. The cradle 13 extends in the horizontal direction from the upper end of the downstream side surface of the lower housing 803 toward the downstream side. The shapes of the cradles 12 and 13 are box-like shapes that are substantially rectangular in plan view with the conveying direction as the longitudinal direction. The cradle 12 receives the pedestal 2 conveyed toward the opening 805 on the upper surface. The cradle 13 receives the pedestal 2 and the article 3 whose packaging has been completed on the upper surface. The leg portions 121 and 131 support the cradle 12 and 13 from below.

  The upper surface of the cradle 12 is referred to as “receiving surface 12A”, and the upper surface of the cradle 13 is referred to as “receiving surface 13A”. The receiving surfaces 12A and 13A are horizontal and form substantially the same plane. Therefore, the receiving surfaces 12A and 13A are flat surfaces that can smoothly convey the base 2. A portion where the pedestal 2 is transported on the receiving surfaces 12A and 13A is referred to as a “transport path 103” (see FIGS. 2 and 19). The conveyance path 103 is parallel to the downstream direction from the upstream. A pedestal sensor 410 (see FIG. 2) capable of detecting the pedestal 2 is provided on the downstream side and the left side of the receiving surface 12A in the transport direction. The pedestal sensor 410 is a contact type sensor that can contact the pedestal 2.

  As shown in FIG. 2, the packaging device 1 includes a bottom 10 and side plate members 111 and 112. The shape of the bottom 10 is a rectangular shape in plan view. The side plate member 111 extends in the upward vertical direction from the right end portion of the bottom portion 10. The side plate member 112 extends in the upward vertical direction from the left end portion of the bottom portion 10. Each shape of the side plate members 111 and 112 is a substantially rectangular plate shape whose longitudinal direction is the vertical direction. The inner surfaces of the side plate members 111 and 112 face each other. The cradle 12 is supported by end portions on the upstream side of the side plate members 111 and 112. The cradle 13 is supported by the downstream ends of the side plate members 111 and 112.

  As shown in FIG. 2, endless belts 511 and 512 are provided at the right end and the left end of the cradles 12 and 13, respectively. Each of the belts 511 and 512 has teeth on the inner surface. The belts 511 and 512 are connected to a motor 222 (see FIG. 20) via a pulley (not shown), a shaft member (not shown), a gear (not shown), and the like. The motor 222 is a stepping motor provided inside the cradle 13. When the motor 222 is driven, the belts 511 and 512 integrally rotate counterclockwise or clockwise as viewed from the right side. Hereinafter, unless there is a special limitation, clockwise and counterclockwise indicate the rotation direction in the right side view of the packaging device 1.

  Portions of the outer surfaces of the belts 511 and 512 facing upward are exposed to the receiving surfaces 12A and 13A and extend in the transport direction. A right transport unit 61 is provided on the outer surface of the belt 511, and a left transport unit 62 is provided on the outer surface of the belt 512. The right transport unit 61 protrudes in the vertical direction and the outward direction with respect to the outer surface of the belt 511. The left conveyance unit 62 protrudes in the vertical direction and the outward direction with respect to the outer surface of the belt 512. The right transport unit 61 and the left transport unit 62 face each other in the left-right direction. The pedestal 2 is attached to the right transport unit 61 and the left transport unit 62 (see FIG. 1). Hereinafter, the right conveyance unit 61 and the left conveyance unit 62 are collectively referred to as a “conveyance unit 60”. When the motor 222 rotates the belts 511 and 512 in the counterclockwise direction, the right transport unit 61 and the left transport unit 62 transport the pedestal 2 from the upstream side to the downstream side. On the other hand, when the motor 222 rotates the belts 511 and 512 in the clockwise direction, the base 2 is conveyed from the downstream side to the upstream side.

<Film roll 22>
The film roll 22 is detachably and rotatably supported inside the upper ends of the side plate members 111 and 112, respectively. Hereinafter, the part inside each upper end part of the side plate members 111 and 112 and to which the film roll 22 is attached is referred to as “film roll support part 11A”. The film roll 22 has a film 24 and a substantially cylindrical winding shaft (not shown). The film 24 is wound around a winding shaft. A film gear 23B is provided on the right side surface of the winding shaft. The film gear 23B meshes with the connecting gear 651 from the upstream side in a state where the film roll 22 is mounted on the film roll support portion 11A. The connection gear 651 is connected to the motor 227. The film roll 22 can rotate in conjunction with the rotation of the motor 227. Even if the motor 227 does not rotate, the film roll 22 can rotate.

  Rollers 654A and 654B (see FIG. 19) are provided on the upstream side of the film roll support portion 11A. The rollers 654A and 654B are columnar members that extend between the side plate members 111 and 112 in the left-right direction. The roller 654B is disposed on the downstream side with respect to the roller 654A. The rollers 654A and 654B are rotatably supported by the side plate members 111 and 112 on both sides in the left-right direction. The film 24 fed out from the film roll 22 is sandwiched from both sides in the transport direction by the rollers 654A and 654B.

<Induction member 39>
As shown in FIG. 2, a carriage (not shown) is provided on the upstream portion of the right side surface of the side plate member 111. The carriage moves up and down by the rotation of the motor 221 provided on the side plate member 111. The carriage provided on the side plate member 111 is connected to a support member 341 (see FIG. 3). A carriage (not shown) is provided on the left side surface of the side plate member 112. The carriage provided on the side plate member 112 is connected to the support member 342.

  As shown in FIG. 3, the support members 341 and 342 are plate-like members having a thickness in the left-right direction. The supporting members 341 and 342 extend downward from above and bend further toward the downstream side. The shapes of the support members 341 and 342 are symmetrical. Support members 341 and 342 are spaced apart in the left-right direction. The separation distance in the left-right direction of the support members 341, 342 is slightly longer than the length in the left-right direction of the cradle 12, 13 (see FIG. 2). The upstream end of the support member 341 is connected to a carriage (not shown) provided on the side plate member 111, and the upstream end of the support member 342 is connected to a carriage (not shown) provided on the side plate member 112. To do. Hereinafter, the support members 341 and 342 are collectively referred to as “a pair of support members 34”.

  The pair of support members 34 support the pressing rollers 30 to 33. The pressing rollers 30 to 33 have a substantially cylindrical shape extending in the left-right direction between the pair of support members 34. Each of the pressing rollers 30 to 33 is rotatable about an axis extending in the left-right direction. The pressing roller 30 is a gear whose outer peripheral surface is formed in an uneven shape over the rotational direction. The pressing roller 31 is arranged with a gap upstream and above the pressing roller 30. The pressing roller 32 is arranged with a gap on the upstream side and the lower side with respect to the pressing roller 31. The height of the pressing roller 32 is substantially the same as the height of the pressing roller 30. The pressing rollers 30 and 32 are arranged horizontally. The pressing roller 33 is spaced apart from the pressing rollers 30 to 32 on the upstream side. The height of the pressing roller 33 is slightly higher than the height of the pressing roller 31. Hereinafter, the pair of support members 34 and the pressing rollers 30 to 33 are collectively referred to as “guidance members 39”.

  When the motor 221 (see FIG. 2) moves the carriage provided on each of the side plate members 111 and 112 in the vertical direction, the guide member 39 can move in the vertical direction. FIG. 19 shows a state in which the guide member 39 is disposed at the uppermost position. In this case, the pair of support members 34 are located between the film roll 22 and the transport path 103. In a state where the guide member 39 is disposed at the lowest position (not shown), the pair of support members 34 are disposed on both the left and right sides with respect to the transport path 103, and the pressing rollers 30 to 32 are disposed on the lower side of the transport path 103. Then, the pressing roller 33 is disposed on the upper side of the conveyance path 103. Hereinafter, the movement path of the pressing roller 30 accompanying the movement of the pair of support members 34 is referred to as “movement path 104” (see FIG. 19). The movement path 104 is orthogonal to the transport path 103 and extends along the vertical direction. The movement path 104 is parallel to the left-right direction. A position where the transport path 103 and the movement path 104 intersect is referred to as an “intersection position 105” (see FIG. 19). The intersection position 105 is located on the downstream side of the second heating unit 495 (see FIG. 19).

<Holding mechanism 70 (pedestal guide roller 71, holding member 72)>
As shown in FIG. 19, a pedestal guide roller 71 extending in the left-right direction is provided on the upstream side of the portion sandwiched between the side plate members 111 and 112 (see FIG. 2) and below the conveyance path 103. The pedestal guide roller 71 guides the pedestal 2 conveyed from the upstream side to the downstream side along the conveyance path 103 to the downstream side.

  A holding member 72 extending in the left-right direction is provided on the downstream side of the pedestal guide roller 71. The holding member 72 is supported by a pair of support members (not shown). The pair of support members are provided on both the left and right sides of the holding member 72, respectively. The pair of support members can rotate around an axis (not shown) extending in the left-right direction substantially below the pedestal guide roller 71. The pair of support members are rotated by a motor 226 (see FIG. 20). Due to the rotation of the pair of support members, the holding member 72 moves closer to the pedestal guide roller 71 from the downstream side (see FIG. 19), and the holding member 72 moves downstream and lower than the pedestal guide roller 71. Rotates between the separated positions (not shown). Hereinafter, the pedestal guide roller 71, the holding member 72, and the pair of support members are collectively referred to as “holding mechanism 70”. The state of the holding mechanism 70 in which the holding member 72 is close to the downstream side of the pedestal guide roller 71 is referred to as a “clamping state” (see FIG. 19). The state of the holding mechanism 70 in which the holding member 72 is separated from the pedestal guide roller 71 is referred to as a “released state” (not shown). The position in the transport direction of the holding member 72 in the sandwiched state is referred to as “predetermined position 106”.

  The holding mechanism 70 in the holding state can hold the lower end portion of the film 24 fed out from the film roll 22 between the holding member 72 and the pedestal guide roller 71. On the other hand, when the holding mechanism 70 is in the released state, for example, as shown in FIG. 13, the lower end portion of the film 24 fed out from the film roll 22 is released from the holding member 72 and the pedestal guide roller 71.

<Heating mechanism 86>
The heating mechanism 86 will be described with reference to FIGS. The heating mechanism 86 includes a first heater moving mechanism 430 and a second heater moving mechanism 460. The first heater moving mechanism 430 is provided on the upstream side of the space formed between the side plate members 111 and 112 (see FIG. 2) and on the lower side of the transport path 103 (see FIG. 2). The first heater moving mechanism 430 is provided on the downstream side of the predetermined position 106 (see FIG. 19). The first heater moving mechanism 430 includes a left fixing plate 402, a right fixing plate 404, a rotating shaft 431, a motor 223, and a pedestal portion 421. Each of the left fixing plate 402 and the right fixing plate 404 is rectangular in a side view. The left fixing plate 402 and the right fixing plate 404 are fixed at a position with a gap left and right. The rotation shaft 431 is a shaft member that extends in the left-right direction, and is rotatably supported by the left fixing plate 402 and the right fixing plate 404. A left pinion 431A is fixed to the left end portion of the rotation shaft 431, and a right pinion 431B is fixed to the right end portion of the rotation shaft 431.

  The motor 223 is a stepping motor that is fixed to the right surface of the left fixed plate 402 at a position above the rotation shaft 431. A gear 223A fixed to the output shaft of the motor 223 is connected to the left pinion 431A via a multistage gear 432 provided on the left fixed plate 402.

  The pedestal portion 421 is provided on the upstream side of the left pinion 431A and the right pinion 431B. The pedestal portion 421 includes a connecting wall portion 421A, an upper wall surface 421B, a fixing portion 471, a fixing portion 472, and a fixing portion 473. The connecting wall portion 421A has a substantially rectangular shape that is long in the left-right direction when viewed from the downstream side, and includes an upper wall surface 421B. As shown in FIG. 6, a fixed portion 471, a fixed portion 472, and a fixed portion 473 are provided on the upper wall surface 421 </ b> B at regular intervals so as to protrude upward. The fixing portions 471, 472, and 473 each have an inverted U-shaped outer frame 471A, 472A, and 473A as viewed from the downstream side. Inner frames 471A, 472A, and 473A are provided with inner frames 471B, 472B, and 473B that intersect in the vertical and horizontal directions. Racks 422 are formed at the left and right ends of the downstream end face of the connecting wall 421A. The rack 422 on the left side meshes with the left pinion 431A, and the rack 422 on the right side meshes with the right pinion 431B. Two cylindrical portions 424 are provided on the left surface of the connecting wall portion 421A along the vertical direction. The two cylindrical portions 424 are along the vertical direction. A guide shaft 425 is inserted through the two cylindrical portions 424. A cylindrical portion 423 is provided at the lower portion of the right surface of the connecting wall portion 421A. A detected portion 415 is provided on the right surface of the cylindrical portion 423. The detected portion 415 has a plate shape having a thickness in the transport direction. A guide shaft 425 is inserted through the cylindrical portion 423.

  The driving force of the motor 223 is transmitted to the pedestal portion 421 via the gear 223A, the multistage gear 432, the left pinion 431A, the rotating shaft 431, the right pinion 431B, and the rack 422. Thereby, the pedestal portion 421 can move up and down along the two guide shafts 425.

  A first upper sensor 411 (see FIG. 5) and a first lower sensor 412 (see FIG. 5) are fixed to the left surface of the right fixing plate 404 in order from the top. The first upper sensor 411 and the first lower sensor 412 are both transmissive sensors that can detect the detected portion 415 of the cylindrical portion 423. The first upper sensor 411 detects the detected part 415 of the base part 421 at the upper end position of the movable range. The first lower sensor 412 detects the detected part 415 of the base part 421 at the lower end position of the movable range.

  A fixing plate 443E of a first mounting member 427 described later is fixed to the fixing portions 471, 472, and 473 of the base portion 421 by three fixing screws 428, and the first replacement unit 440 is detachably mounted. The second heater moving mechanism 460 also has the same structure as the first heater moving mechanism 430.

<First exchange unit 440>
As shown in FIGS. 5 to 8, the first replacement unit 440 includes a first mounting member 427, a first holding unit 442, and five first heating units 445. The first mounting member 427 has a box shape that is long in the left-right direction and opens upward, and includes a first side surface 427A (see FIG. 7) and a second side surface 427B (see FIG. 8). As shown in FIG. 7, a pair of left and right rectangular fixed protrusions 427C and 427C are provided on the upper end of the first side surface 427A. As shown in FIG. 8, a rectangular fixed protrusion 427D extending in the left-right direction is provided at the upper end of the second side surface 427B. A first holding part 442 is provided on the upper part of the first mounting member 427. The five first heating units 445 are held by the first holding part 442 and are arranged at equal intervals along the left-right direction. A drawer connector 450 is provided below the first mounting member 427, and power is supplied to each first heating unit 445.

<First heating unit 445>
The five first heating units 445 are electrically connected in series. As shown in FIGS. 9 and 10, each first heating unit 445 has a substantially rectangular parallelepiped shape that is long in the left-right direction, and includes an upper surface 445J and a bottom surface 445H. A first heater 861A (see FIG. 20) is provided on the upper surface 445J of the first heating unit 445. The first heating unit 445 includes a first outer surface 445 </ b> A and a second outer surface 445 </ b> B that extend in a direction intersecting the conveyance path (as an example, the left-right direction). The first outer surface 445A and the second outer surface 445B face each other.

  A first protrusion 445C and a second protrusion 445D are provided on the first outer surface 445A with a predetermined interval in a direction (left-right direction) intersecting the transport path. The first protrusion 445C and the second protrusion 445D are columnar protrusions extending in a direction orthogonal to the first outer surface 445A. Also on the second outer surface 445B, a third protrusion 445E and a fourth protrusion 445F are provided at regular intervals in the direction (left-right direction) intersecting the transport path. The third protrusion 445E and the fourth protrusion 445F are also columnar protrusions extending in a direction orthogonal to the second outer surface 445B. For example, the first protrusion 445C, the second protrusion 445D, the third protrusion 445E, and the fourth protrusion 445F have the same shape and the same size. The first protrusion 445C and the second protrusion 445D protrude in parallel with the upper surface 445J, and the third protrusion 445E and the fourth protrusion 445F also protrude in parallel with the upper surface 445J. The left and right ends of the first heating unit 445 are provided with electrode portions 445G to which the terminal fittings 449 are fixed by screws 447, respectively. A pair of springs 448 that urge the first heating unit 445 upward are provided on the bottom surface 445H of the first heating unit 445. Note that the lower end portion of the spring 448 abuts on the upper surface of a bottom surface portion 446 described later of the first holding portion 442 to urge the first heating unit 445 upward.

  The first heater 861A (see FIG. 20) of each first heating unit 445 is turned on and off by the first relay 861B (see FIG. 20). The first heater 861A is a plate-like member made of iron chrome, and is a resistance heating type heater that generates heat when energized. The first relay 861B switches between a state in which energization to the first heater 861A is permitted and a state in which energization is restricted. The temperature of each first heater 861A is detected by a first thermistor 413 (see FIG. 20).

<First holding portion 442>
As shown in FIG. 7, the first holding portion 442 includes a first support plate 443, a second support plate 444, and a bottom surface portion 446. The first support plate 443 is a rectangular plate material extending in the left-right direction, and faces the first outer surface 445A of the first heating unit 445. The first support plate 443 is provided with five sets of first guide holes 443A into which the first protrusions 445C of the first heating units 445 are inserted and second guide holes 443B into which the second protrusions 445D are inserted. Yes. The first guide hole 443A and the second guide hole 443B are elongated holes that are long in the vertical direction, and the upper part and the lower part have an arc shape. From the lower part of the first support plate 443, a pair of left and right flange portions 443C and 443C protrude horizontally in the downstream direction, and a pair of left and right flange portions 443D and 443D horizontally extend in the downstream direction between the flange portions 443C and 443C. Is protruding. A fixing plate 443E extending in the left-right direction is extended on the lower surfaces of the flange portions 443C and 443C and the flange portions 443D and 443D. The fixing plate 443E is provided with fixing screws 428 at three locations. Fixed protrusions 427C are positioned below the flange portions 443C and 443C, and the flange portions 443C and 443C are fixed to the fixed protrusions 427C by fixing screws 429A and 429A. Below the flange portions 443D and 443D, trapezoidal protruding wall portions 427E and 427F each including a wall portion protruding downstream are provided. In the state where the first replacement unit 440 is fixed to the pedestal portion 421, as shown in FIG. 5, the right protruding wall portion 427E is located between the fixed portion 471 and the fixed portion 472, and the fixed portion 472 and the fixed portion Between the 473, the left protruding wall portion 427F is located.

  The second support plate 444 is a rectangular plate material extending in the left-right direction and faces the second outer surface 445B of the first heating unit 445. The second support plate 444 is provided with five sets of third guide holes 444A into which the third protrusions 445E of the first heating units 445 are inserted and fourth guide holes 444B into which the fourth protrusions 445F are inserted. Yes. The third guide hole 444A and the fourth guide hole 444B are elongated holes that are long in the vertical direction, and the upper part is arcuate and the lower part is linear.

  As shown in FIG. 7, the gap between the first guide hole 443A and the first protrusion 445C in the direction (left-right direction) intersecting the guide direction (vertical direction) in which the first guide hole 443A guides the first protrusion 445C. Is the first gap 443F. A gap between the second guide hole 443B and the second protrusion 445D in the direction intersecting the guide direction (vertical direction) in which the second guide hole 443B guides the second protrusion 445D is defined as a second gap 443G. As shown in FIG. 8, the gap between the third guide hole 444A and the third protrusion 445E in the direction (left-right direction) intersecting the guide direction (vertical direction) in which the third guide hole 444A guides the third protrusion 445E. Is the third gap 444C. The gap between the fourth guide hole 444B and the fourth protrusion 445F in the direction (left-right direction) intersecting the guide direction (vertical direction) in which the fourth guide hole 444B guides the fourth protrusion 445F is defined as a fourth gap 444D. . In this case, any one of the first gap 443F to the fourth gap 444D is formed to be narrower than the other three gaps. As an example, the first gap 443F is narrower than the other three gaps. Therefore, in order to regulate the position of the first heating unit 445, the accuracy of the gap between at least one guide hole and one protrusion is sufficient, and the degree of freedom in the accuracy of the gap between other guide holes and the protrusion is not limited. Rise.

  The first heating unit 445 can move between the first proximity position (see FIG. 6) and the first separation position (see FIG. 5) as the pedestal portion 421 moves up and down. The first proximity position is the upper end position of the movable range of the first heating unit 445. When the base part 421 is located at the upper end position of the movable range, the first heating unit 445 is located at the first proximity position. The 1st heating unit 445 in a 1st proximity position approaches from the downward direction with respect to the conveyance path | route 103 (refer FIG. 2). The first separation position is the lower end position of the movable range of the first heating unit 445. When the base part 421 is located at the lower end position of the movable range, the first heating unit 445 is located at the first separation position. The first heating unit 445 at the first separation position is separated downward with respect to the transport path 103 as compared with the case at the first proximity position.

  As shown in FIG. 4, the heating mechanism 86 includes a second heater moving mechanism 460. The second heater moving mechanism 460 is provided on the downstream side with respect to the first heater moving mechanism 430. The second heater moving mechanism 460 has the same configuration as the first heater moving mechanism 430. The second heater moving mechanism 460 includes a left fixed plate 462, a right fixed plate 464, a rotation shaft (not shown), a motor 224, and a pedestal portion 481. The left fixing plate 462 corresponds to the left fixing plate 402, and the right fixing plate 464 corresponds to the right fixing plate 404. Similarly, the rotating shaft of the second heater moving mechanism 460 corresponds to the rotating shaft 431 (see FIG. 5), the motor 224 corresponds to the motor 223, and the pedestal portion 481 corresponds to the pedestal portion 421. A second upper sensor 451 (see FIG. 20) and a second lower sensor 452 (see FIG. 20) are fixed to the left surface of the right fixing plate 464 in order from above. The second upper sensor 451 corresponds to the first upper sensor 411, and the second lower sensor 452 corresponds to the first lower sensor 412. Both the second upper sensor 451 and the second lower sensor 452 can detect a detected portion (not shown) of the pedestal portion 481.

  A second mounting member 487 is supported on the pedestal portion 481. The second mounting member 487 has the same configuration as the first mounting member 427. A second replacement unit 490 is detachably mounted inside the second mounting member 487. The second exchange unit 490 has the same configuration as the first exchange unit 440. The second exchange unit 490 includes a second holding part 492 and five second heating units 495. The second holding unit 492 corresponds to the first holding unit 442, and the second heating unit 495 corresponds to the first heating unit 445. Each second heating unit 495 includes a second heater 862A (see FIG. 20) and a second relay 862B (see FIG. 20). The second heater 862A corresponds to the first heater 861A, and the second relay 862B corresponds to the first relay 861B. The temperature of each second heater 862A is detected by a second thermistor 453 (see FIG. 20).

  As the pedestal portion 481 moves up and down as the motor 224 is driven, the second heating unit 495 can move up and down in the same manner as the first heating unit 445.

<First Lock Mechanism 530 and Second Lock Mechanism 560>
Next, the structures of the first lock mechanism 530 and the second lock mechanism 560 will be described with reference to FIGS. The first lock mechanism 530 is a lock mechanism that locks the vertical movement of the fixing portion 472 to which the first replacement unit 440 of the heating mechanism 86 is detachably fixed, and the second lock mechanism 560 is the second lock mechanism 560. This is a locking mechanism that locks the vertical movement of the fixing portion 472 to which the replacement unit 490 is detachably fixed. As shown in FIGS. 11 and 17, a first lock mechanism 530 is provided at the center in the left-right direction of the base 520 that is held by the right fixing plate 404 and the left fixing plate 402 (see FIG. 4) and through which the base 2 passes. Is provided. A second lock mechanism 560 is provided at the center in the left-right direction of the base 550 that is held by the right fixing plate 464 and the left fixing plate 462 (see FIG. 4) and through which the base 2 passes. The first lock mechanism 530 is provided with a connecting member 531, and the second lock mechanism 560 is provided with a connecting member 561. As shown in FIG. 11, the connecting member 531 can lock the vertical movement of the fixing portion 472 by connecting the base portion 520 and the fixing portion 472 at the position where the first heating unit 445 is raised to the first proximity position. . The connecting member 561 can lock the vertical movement of the fixed portion 472 by connecting the base portion 550 and the fixed portion 472 at the position where the second heating unit 495 is moved up to the second proximity position.

<Connecting member 531>
As shown in FIG. 12, the connecting member 531 includes a knob portion 532 including a knob portion 532 and a main body portion 533, and has a locking portion 532A that protrudes upward and extends in the left-right direction. A main body 533 is provided below the knob 532. The main body 533 is a rectangular plate material, and a recess 533C is formed between the tip 533A and the tip 533B. The recess 533C has a semicircular shape when viewed from above. A strut portion 532B is connected between the knob portion 532 and the main body portion 533. A gap 532D is formed on the left side of the column part 532B, and a gap 532C is provided on the right side of the column part 532B. A protrusion 532E is formed on the main body 533 facing the gap 532C, and a space 532F is formed below the protrusion 532E. Accordingly, the protrusion 532E can be bent downward. The main body 533 facing the gap 532D has the same structure.

  As shown in FIGS. 14 and 15, the connecting member 531 is slidably fitted in a groove formed in the center in the left-right direction of the base 520. The wall portion 521 of the base portion 520 enters the gaps 532C and 532D, respectively. When the user pushes the knob portion 532 of the connecting member 531, the distal end portion 533A and the distal end portion 533B of the main body portion 533 protrude upstream. When the user pushes the knob portion 532 downstream, the distal end portion 533A and the distal end portion 533B of the main body portion 533 are retracted downstream. Due to the protrusion 532E (see FIG. 12), a click feeling is generated when the knob 532 is moved.

<Connection member 561>
As illustrated in FIG. 13, the connecting member 561 includes a knob portion 562, a main body portion 563, and an inclined portion 565. The knob portion 562 is rectangular when viewed from above, and includes a locking portion 562A that protrudes upward and extends in the left-right direction. A main body portion 563 is provided obliquely below the upstream side of the knob portion 562. The main body portion 563 is a rectangular plate material, the tip portions 564A, 564B side are one step lower, and a recess 564C is formed. The recess 533C has a rectangular notch shape when viewed from above. An inclined portion 565 is connected between the knob portion 562 and the main body portion 563. The column portion 562B is connected to the upper end portion of the inclined portion 565 and the knob portion 562. A gap 562D is formed on the left side of the column part 562B, and a gap 562C is provided on the right side of the column part 562B. A projection 562E is formed at the upper end of the inclined portion 565 facing the gap 562C, and a space 562F is formed below the projection 562E. Accordingly, the protrusion 562E can be bent downward. The upper end portion of the inclined portion 565 facing the gap 562D has the same structure.

  As shown in FIGS. 14 and 16, a connecting member 561 is slidably fitted in a groove formed in the center in the left-right direction of the base 550. The wall portion 551 of the base portion 550 enters the gaps 562C and 562D, respectively. When the user pushes the knob portion 562 of the connecting member 561 upstream, the distal end portion 564A and the distal end portion 564B of the main body portion 563 project upstream. When the user pushes the knob portion 562 downstream, the distal end portion 563A and the distal end portion 563B of the main body portion 563 are retracted downstream. Due to the protrusion 562E (see FIG. 13), a click feeling is generated when the knob 532 is moved.

  The state of the heating mechanism 86 shown in FIG. 17 is a state in which the first lock mechanism 530 locks the vertical movement of the fixing portion 472 to which the first replacement unit 440 of the heating mechanism 86 is detachably fixed. Further, the second lock mechanism 560 locks the vertical movement of the fixing portion 472 to which the second replacement unit 490 of the heating mechanism 86 is detachably fixed.

<Rotation suppression mechanism 80>
The rotation suppression mechanism 80 shown in FIG. 18 is provided on the downstream side of the second heating unit 495 and below the conveyance path 103 (see FIG. 19). The rotation suppression mechanism 80 includes a grip roller 81, a shaft member 81A, a gear 81B, and an electromagnetic brake 82. The grip roller 81 is a gear that extends in the left-right direction. The grip roller 81 is disposed below the pressing roller 30 of the guide member 39 (see FIG. 19). The length of the grip roller 81 in the left-right direction is substantially equal to the length of the pressing roller 30 (see FIG. 3) of the guide member 39 in the left-right direction. The shaft member 81 </ b> A is a shaft member that extends in the left-right direction and supports the grip roller 81. A gear 81B is fixed to the right end portion of the shaft member 81A. The gear 81B, the shaft member 81A, and the grip roller 81 can rotate integrally.

  The electromagnetic brake 82 is provided on the downstream side of the right end of the shaft member 81A. The electromagnetic brake 82 is connected to the gear 81B. The electromagnetic brake 82 is a well-known electromagnetic brake capable of controlling the rotation of the shaft member 81A with an electromagnetic force. The electromagnetic brake 82 restricts the rotation of the shaft member 81A while being energized. In this case, the rotation of the grip roller 81 is restricted by the electromagnetic brake 82. On the other hand, the electromagnetic brake 82 does not restrict the rotation of the shaft member 81A in a state where the energization is stopped. In this case, the grip roller 81 can rotate.

<Cutting part 77>
As shown in FIG. 19, a guide rail 74 extending in the left-right direction is provided below the intersection position 105. The cutting part 77 has a hole penetrating in the left-right direction. The cutting part 77 is movable in the left-right direction along the guide rail 74. The cutting portion 77 includes a blade portion 771 that protrudes upward and extends in the left-right direction. The motor 225 (see FIG. 7) moves the cutting portion 77 in the left-right direction along the guide rail 74.

<Pedestal 2>
The pedestal 2 will be described with reference to FIG. The pedestal 2 is produced by bending a substantially rectangular plate-shaped portion 90 with bent portions 911 and 912. The bent portions 911 and 912 are folds extending in the transport direction and arranged at intervals in the left-right direction. A portion sandwiched between the bent portions 911 and 912 in the plate-like portion 90 is referred to as a “first plate-like portion 905”. In addition, among the portions obtained by virtually dividing the first plate-like portion 905 into three along the transport direction, the portion of the first plate-like portion 905 at the center is referred to as “center portion 905A”. A central portion 905A of the first plate-like portion 905 is a portion where the article 3 is easily placed by the user. A portion of the plate-like portion 90 that stands up from the bent portion 911 is referred to as a “second plate-like portion 906”. A portion of the plate-like portion 90 that stands up from the bent portion 912 is referred to as a “second plate-like portion 907”. The first plate-like portion 905 has a plurality of holes 927 formed at equal intervals along each of the bent portions 911 and 912. FIG. 1 illustrates only the plurality of holes 927 formed in the bent portion 911 among the plurality of holes 927 formed in each of the bent portions 911 and 912. The plurality of holes 927 formed in the bent portion 911 and the plurality of holes 927 formed in the bent portion 912 are arranged in the left-right direction.

  The conveyance part 60 can be attached to each of the plurality of holes 927. Specifically, as shown in FIG. 1, when the user places the pedestal 2 on the cradle 12, each of the plurality of holes 927 has a pair of holes 927 facing in the left-right direction on the downstream side in the transport direction. The conveyance part 60 is attached. Thereby, the conveyance part 60 attached to a pair of hole 927 can convey the base 2 to the downstream of a conveyance direction.

<Electrical configuration>
The electrical configuration of the packaging device 1 will be described with reference to FIG. The packaging device 1 includes a CPU 201, a flash ROM 202, a RAM 203, and an operation unit 206. The CPU 201 controls the entire packaging device 1. The CPU 201 is electrically connected to the flash ROM 202 and the RAM 203. The CPU 201 executes a packaging process for packaging the article 3 placed on the base 2 with the film 24 by executing a program stored in the flash ROM 202. The flash ROM 202 stores various processing programs executed by the CPU 201.

  The packaging device 1 includes a pedestal sensor 410, a first upper sensor 411, a first lower sensor 412, and a first thermistor 413. The pedestal sensor 410 outputs an ON signal to the CPU 201 when detecting the pedestal 2 (see FIG. 1). If the pedestal sensor 410 does not detect the pedestal 2, it outputs an OFF signal to the CPU 201. The first upper sensor 411 and the first lower sensor 412 each output an ON signal to the CPU 201 when detecting a detected portion (not shown) of the pedestal portion 421 (see FIG. 4). The first upper sensor 411 and the first lower sensor 412 each output an OFF signal to the CPU 201 when the detected portion of the pedestal portion 421 is not detected. The first thermistor 413 detects the temperature of the first heater 861A and outputs the detected temperature to the CPU 201.

  The packaging device 1 includes a second upper sensor 451, a second lower sensor 452, and a second thermistor 453. The second upper sensor 451 and the second lower sensor 452 each output an ON signal to the CPU 201 when detecting a detected part (not shown) of the pedestal part 481 (see FIG. 4). Each of the second upper sensor 451 and the second lower sensor 452 outputs an OFF signal to the CPU 201 when the detected part of the pedestal part 481 is not detected. The second thermistor 453 detects the temperature of the second heater 862A and outputs the detected temperature to the CPU 201.

  The packaging device 1 includes a display unit 207, an electromagnetic brake 82, a first relay 861B, a first heater 861A, a second relay 862B, and a second heater 862A. The display unit 207 displays various types of information according to signals output from the CPU 201. The electromagnetic brake 82 is electrically connected to the CPU 201. The first relay 861B and the second relay 862B are electrically connected to the CPU 201, respectively. The first relay 861B and the second relay 862B are electrically connected to the first heater 861A of the first heating unit 455 and the second heater 862A of the second heating unit 495, respectively. The CPU 201 controls energization of the first heater 861A and the second heater 862A via the first relay 861B and the second relay 862B.

  The packaging device 1 includes five first thermistors 413, second thermistors 453, first relays 861B, first heaters 861A, second relays 862B, and second heaters 862A. In FIG. 20, only one of each of the six types of members is illustrated.

  The packaging device 1 includes drive units 211 to 217, motors 221 to 227, and an encoder 232. The drive units 211 to 217 are electrically connected to the CPU 201. Drive units 211 to 217 are electrically connected to motors 221 to 227, respectively. The drive units 211 to 217 drive the motors 221 to 227 by outputting pulse signals to the motors 221 to 227 in accordance with signals output from the CPU 201, respectively. The encoder 232 outputs a number of pulse signals corresponding to the rotation of the motor 222.

<Maintenance processing>
With reference to the flowchart of FIG. 21, the maintenance process performed by CPU201 of the packaging apparatus 1 is demonstrated. When the packaging process by the packaging device 1 is repeated, deposits such as dust adhere to the first heater 861A of the first heating unit 455 and the second heater 862A of the second heating unit 495, and the first heater 861A and the second heater 861A. The heater 862A may deteriorate, and the accuracy of welding the film 24 to the base 2 may be reduced. In this case, the first replacement unit 440 or the second replacement unit 490 needs to be replaced. The user operates the operation unit 206 to select maintenance processing. When the CPU 201 detects that the maintenance process has been selected (S1: YES), it controls the drive unit 213 to drive the motor 223, and the first heating unit 445 is moved from the first separation position shown in FIG. The first proximity position shown is raised (S2). This first proximity position is an “exchange position” where the first exchange unit 440 can be exchanged.

  Next, the CPU 201 stops driving the motor 223 when the first upper sensor 411 (see FIG. 20) outputs an ON signal instead of the OFF signal. The first heating unit 445 rises from the first separation position shown in FIG. 4 to the first proximity position shown in FIG. Further, the CPU 201 controls the driving unit 214 to drive the motor 224 to raise the second heating unit 495 from the second separation position shown in FIG. 4 to the second proximity position shown in FIG. 11 (S2). This second proximity position is an “exchange position” where the second exchange unit 490 can be exchanged. When the second upper sensor 451 (see FIG. 20) outputs an ON signal instead of the OFF signal, the CPU 201 stops driving the motor 224.

  In this state, when the user pushes the knob portion 532 of the connecting member 531 to the upstream side, the distal end portion 533A and the distal end portion 533B of the main body portion 533 project upstream, and the outer frame 472A and the inner frame of the fixing portion 472 are projected. The distal end portion 533A and the distal end portion 533B are inserted into the space between 472B. Accordingly, the connecting member 531 connects the base portion 520 and the fixing portion 472 to lock the vertical movement of the fixing portion 472. Further, when the user pushes the knob portion 562 of the connecting member 561 upstream, the distal end portion 564A and the distal end portion 564B of the main body portion 563 protrude upstream, and the outer frame 472A and the inner frame 472B of the fixing portion 472 The tip portion 533A and the tip portion 533B are inserted into the space between the two. Accordingly, the connecting member 561 connects the base portion 550 and the fixing portion 472 at the position where the second heating unit 495 has moved up to the second proximity position, and locks the vertical movement of the fixing portion 472.

  Next, the user operates the operation unit 206 to instruct the CPU 201 to turn off the power. When the CPU 201 detects an instruction to turn off the power (S3: YES), the CPU 201 turns off the power of the packaging device 1 (S4). Since the connecting member 531 connects the base portion 520 and the fixing portion 472, the fixing portion 472 does not descend even when the power is turned off. Further, since the connecting member 561 connects the base portion 550 and the fixing portion 472, the fixing portion 472 does not descend even when the power is turned off. The user removes the three fixing screws 428 shown in FIG. 6 and replaces the first replacement unit 440. The second replacement unit 490 is replaced in the same manner. Therefore, it is not necessary to replace the first heating unit 455 and the second heating unit 495 while the first heater 861A of the first heating unit 455 and the second heater 862A of the second heating unit 495 are energized.

  Next, when the user pushes the knob portion 532 downstream, the distal end portion 533A and the distal end portion 533B of the main body portion 533 are retracted downstream, and the connection between the base portion 520 and the fixing portion 472 by the connecting member 531 is released. Is done. Similarly, when the user pushes the knob portion 562 to the downstream side, the distal end portion 563A and the distal end portion 563B of the main body portion 563 are retracted to the downstream side, and the connection between the base portion 550 and the fixing portion 472 by the connecting member 561 is performed. Canceled.

<Power-on processing>
Next, the power-on process executed by the CPU 201 of the packaging device 1 will be described with reference to the flowchart shown in FIG. When the packaging apparatus 1 is turned on, the CPU 201 reads out and executes the program stored in the flash ROM 202 to start the power-on process. CPU201 performs the initialization process which initializes the state of the packaging apparatus 1 (S11). An example is as follows. The CPU 201 controls the driving unit 211 to drive the motor 221 so that the guide member 39 is disposed at the top (see FIG. 19). The CPU 201 controls the drive unit 212 to drive the motor 222, and moves the transport unit 60 to the start position (see FIG. 1). The start position is a position at which the transport unit 60 starts transporting the base 2. In this example, when the transport unit 60 is in the start position, the transport unit 60 protrudes upward from the same position in the transport direction as the downstream end of the receiving surface 12A.

  CPU201 controls actuator 213, drives motor 223, and moves the 1st heating unit 445 to the 1st separation position. CPU201 controls actuator 214, drives motor 224, and moves the 2nd heating unit 495 to the 2nd separation position. CPU201 controls actuator 215, drives motor 225, and moves blade 771 to the left end position of a movable range. The CPU 201 controls the driving unit 216 to drive the motor 226, thereby bringing the holding mechanism 70 into a released state. The CPU 201 stops energization of the electromagnetic brake 82. As a result, the grip roller 81 becomes rotatable (S11).

  Next, the CPU 201 performs heating unit position error detection (S12). As an example, the CPU 201 detects the detected portion 415 of the pedestal portion 421 by the first upper sensor 411 (S12). If the first upper sensor 411 detects the detected part 415, it is an error detection (S13: YES). In this case, since the position of the first heating unit 445 remains at the first proximity position, the connection member 531 may be forgotten to be released. The CPU 201 displays an error message such as “Please release the connecting member 531” on the display unit 207 (S14). CPU201 returns processing to S13. Further, when the CPU 201 detects the detected portion 415 of the pedestal portion 421 by the first lower sensor 412 (S12), even when the first lower sensor 412 does not detect the detected portion 415 of the pedestal portion 421, Error detection (S13: YES). In this case as well, there is a risk of forgetting to release the connecting member 531. The CPU 201 displays an error message such as “Please release the connecting member 531” on the display unit 207 (S14). CPU201 returns processing to S13.

  The heating unit position error detection (S12) is similarly performed on the second heating unit 495 using the second upper sensor 451 and the second lower sensor 452. The heating unit position error detection (S12) is performed in the vicinity of the connecting member 531 and the connecting member 561 without using the first upper sensor 411, the first lower sensor 412, the second upper sensor 451, and the second lower sensor 452. The sensors for detecting the positions of the connecting member 531 and the connecting member 561 may be provided. If the error is not detected (S13: NO), the CPU 201 performs a normal packaging process (S15).

<Main effects of the above embodiment>
As described above, the first lock mechanism 530 locks the base portion 520 and the fixing portion 472 at the first proximity position, which is the replacement position where the first replacement unit 440 to which the first heating unit 445 is fixed can be replaced. . In addition, the second lock mechanism 560 locks the base 550 and the fixing portion 472 at a second proximity position that is an exchange position where the second exchange unit 490 to which the second heating unit 495 is fixed can be replaced. Accordingly, even when the packaging device 1 is turned off, the fixing unit 472 is locked and the first heating unit 445 and the second heating unit 495 are not lowered, so that the heating unit can be easily replaced. Moreover, it is not necessary to replace the heating unit that is energized and heated. Further, since the base portion 520 and the fixed portion 472 are connected by the connecting member 531, the first replacement unit 440 can be locked with a simple structure. Similarly, since the base portion 550 and the fixed portion 471 are connected by the connecting member 561, the second replacement unit 490 can be locked with a simple structure.

  When the CPU 201 determines that the maintenance mode has been selected (S1: YES), the first replacement unit 440 moves the first replacement unit 440 and the second replacement unit 490 to the first proximity position that is the replacement position. In addition, it is not necessary to input an instruction to raise the second replacement unit 490 to the replacement position. Further, if the fixing portion 472 is locked by the first lock mechanism 530 and the second lock mechanism 560, the first replacement unit 440 and the second replacement unit 490 are not lowered even if the packaging device 1 is turned off. The replacement unit 440 and the second replacement unit 490 can be easily replaced.

  When the power of the packaging device 1 is turned on, the CPU 201 lowers the first replacement unit 440 to the first separation position that is the retracted position, and lowers the second replacement unit 490 to the second separation position that is the retracted position. Let In this case, when it is not detected by the first upper sensor 411 and the second lower sensor 452 that the first replacement unit 440 has been lowered to the retracted position, and by the second upper sensor 451 and the second lower sensor 452, In at least one case where it is not detected that the second replacement unit 490 has been lowered to the retracted position, the CPU 201 determines that an error has been detected (S13: YES). Since there is a possibility that the fixing part 472 remains fixed by the lock mechanism, an error can be displayed on the display part 207 to warn the operator.

  The first heating unit 445 includes a first protrusion 445C and a second protrusion 445D on the first outer surface 445A, a third protrusion 445E and a fourth protrusion 445F on the second outer surface 445B, and a first holding part 442. The first support plate 443 is provided with a first guide hole 443A and a second guide hole 443B which are vertically long slots, and the second support plate 444 has a third guide hole 444A and a fourth slot which are vertically long slots. A guide hole 444B is provided. The first protrusion 445C and the second protrusion 445D are respectively guided in the vertical direction by the first guide hole 443A and the second guide hole 443B, and the third protrusion 445E and the fourth protrusion 445F are the third guide hole 444A. And it guides in the up-and-down direction by the 4th guide hole 444B, respectively. Further, the first heating unit 445 is biased upward by a pair of springs 448. Accordingly, the first heating unit 445 can swing both in the intersecting direction (left-right direction) intersecting the transport path 103 and in the direction of the transport path 103. Accordingly, the first heating unit 445 also deforms in the direction of the conveyance path 103 of the pedestal 2 (arrow G direction) shown in FIG. Can follow the deformation of That is, the first heating unit 445 can reliably weld the film 24 to the lower surface of the pedestal 2 following the deformation of the pedestal 2 in any direction.

  In the first heating unit 445, the first gap 443F is narrower than the other three gaps. Therefore, in order to regulate the position of the first heating unit 445, the accuracy of the gap between at least one guide hole and one protrusion is sufficient, and the degree of freedom in the accuracy of the gap between other guide holes and the protrusion is not limited. Rise.

<Modification>
The present invention is not limited to the above embodiment, and various modifications can be made. For example, the first heating unit 445 held by the first replacement unit 440 is not limited to five, and may be any number such as three or four. Further, the position where the film 24 is welded to the lower surface of the pedestal 2 may be the end side in the conveying direction of the pedestal 2 or the center of the pedestal 2 as shown in FIG. Further, the replacement position of the first replacement unit 440 may not be the same as the first proximity position. Further, the replacement position of the second replacement unit 490 may not be the same as the second proximity position. For example, you may raise rather than a 1st proximity position or a 2nd proximity position.

<Others>
The belts 511 and 512, the transport unit 60, and the motor 222 are examples of the “transport mechanism” of the present invention. The first heater moving mechanism 430 and the second heater moving mechanism 460 are examples of the “moving mechanism” in the present invention. The first proximity position or the second proximity position is an example of the “heating position”. The first separation position or the second separation position is an example of the “retraction position”. The first proximity position or the second proximity position is an example of the “exchange position”. The first heater moving mechanism 430 and the second heater moving mechanism 460 are examples of the “moving mechanism”. The CPU 201 is an example of the “control device” in the present invention.
The first upper sensor 411, the first lower sensor 412, the second upper sensor 451, and the second lower sensor 452 are examples of the “first position sensor”.

DESCRIPTION OF SYMBOLS 1 Packaging apparatus 2 Base 3 Article 11A Film roll support part 22 Film roll 30 Pressing roller 39 Guide member 70 Holding mechanism 77 Cutting part 103 Conveyance path 104 Movement path 201 CPU
222 Motor 411 First upper sensor 412 First lower sensor 451 Second upper sensor 452 Second lower sensor 430 First heater moving mechanism 445 First heating unit 460 Second heater moving mechanism 472 Fixed portion 495 Second heating unit 520 Base 530 First lock mechanism 531 Connection member 550 Base 560 Second lock mechanism 561 Connection member

Claims (6)

A packaging device for packaging a pedestal and an article placed on the pedestal with a film,
A transport mechanism for transporting the pedestal on which the article is placed;
A member that guides the film, the guide member being movable along a movement path that extends in a vertical direction across a conveyance path through which the pedestal conveyed by the conveyance mechanism passes;
An exchange unit comprising a heating unit for heating the film guided to the lower side of the pedestal by the induction member;
A fixing part to which the exchange unit is detachably fixed;
A moving mechanism for moving the exchange unit between a heating position for heating the film by the heating unit, and a retracted position retracted from the heating position;
A packaging device, comprising: a locking mechanism that locks the fixing portion in a state where the fixing portion is moved to an exchange position where the exchange unit can be exchanged by the moving mechanism. The moving mechanism includes a base that movably supports the fixed part,
The packaging device according to claim 1, wherein the lock mechanism includes a connecting member that connects the base portion and the fixing portion. A control device for controlling the packaging device;
The controller is
Determining whether a maintenance mode in which the replacement unit can be replaced is selected;
When it is determined that the maintenance mode has been selected, the moving mechanism moves the replacement unit to the replacement position,
The packaging device according to claim 1, wherein the packaging device is turned off. The packaging apparatus includes at least one of a first position sensor that detects a position of the replacement unit and a second position sensor that detects a position of the lock mechanism, and a display device that displays various types of information.
When the packaging device is powered on,
The controller is
Enabling movement of the replacement unit to the retracted position by the moving mechanism;
When the first position sensor does not detect that the replacement unit has moved to the retracted position, and the second position sensor does not cause the position of the lock mechanism to be at a position for fixing the fixing portion. If at least one of the cases where it is not detected, it is determined that the replacement unit is in an error state in which it has not moved to the retracted position;
The packaging apparatus according to claim 3, wherein an error is displayed on the display device. The replacement unit includes a holding unit that holds the heating unit,
Between the holding part and the heating unit, an urging member that urges the heating unit toward a conveyance path through which the pedestal is conveyed is provided.
The heating unit includes a first outer surface formed in a crossing direction intersecting the transport path and a second outer surface facing the first outer surface,
The first outer surface includes a first protrusion and a second protrusion with a predetermined interval in the intersecting direction,
The second outer surface includes a third protrusion and a fourth protrusion with a predetermined interval in the intersecting direction,
The holding portion includes a first support plate facing the first outer surface and a second support plate facing the second outer surface,
The first support plate is provided with a first guide hole and a second guide hole that respectively guide the first protrusion and the second protrusion so as to be movable in the vertical direction.
The third support hole and the fourth guide hole are provided in the second support plate, respectively, for guiding the third protrusion and the fourth protrusion so as to be movable in the vertical direction. The packaging device according to any one of 1 to 4. A gap between the first guide hole and the first protrusion in a direction intersecting a guide direction in which the first guide hole guides the first protrusion is defined as a first gap.
A gap between the second guide hole and the second protrusion in a direction intersecting a guide direction in which the second guide hole guides the second protrusion is a second gap.
A gap between the third guide hole and the third protrusion in a direction intersecting a guide direction in which the third guide hole guides the third protrusion is defined as a third gap;
When the gap between the fourth guide hole and the fourth protrusion in the direction intersecting the guide direction in which the fourth guide hole guides the fourth protrusion is the fourth gap,
Any one of the first to fourth gaps is narrower than the other three gaps,
The packaging device according to claim 5, wherein a guide hole constituting the one gap regulates a position of the heating unit.

Images