JP2017081620A - Packaging device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a packaging device that suppresses clogging of a film accompanying conveyance of a pedestal.SOLUTION: A packaging device 1 is a device for packaging a pedestal 2, on which an article 3 is placed, with a film 24. The packaging device 1 comprises a first heating unit 445 and a second heating unit 495. The first heating unit 445 and the second heating unit 495 are arranged in order from the upstream side on the lower side of a conveying path 103 of the pedestal 2 and can weld the film 24 wrapped around an undersurface of the pedestal 2. The first heating unit 445 welds the film 24 to the undersurface of the pedestal 2. Then, the second heating unit 495 welds the film 24 wrapped around the undersurface of the pedestal 2 at a second time to the film 24 wrapped around the undersurface of the pedestal 2 at the first time.SELECTED DRAWING: Figure 9

Description

  The present invention relates to a packaging device that covers a pedestal on which an article is placed with a film.

  A packaging device that covers a pedestal on which an article is placed with a film is known. For example, in the packaging device disclosed in Patent Document 1, the pedestal is conveyed from the upstream side of the film roll in a state where the leading end of the film fed out from the film roll is sandwiched between the pedestal guide roller and the holding roller. The pedestal is conveyed downstream while pushing the film. A packaging apparatus welds the downstream edge part and film of a base with a heater. The first welding of the pedestal and the film is performed. Thereafter, the packaging device moves the holding roller to release the film leading end, and then conveys the pedestal further downstream. The remaining film moves downstream along with the pedestal. The remaining film is a portion on the tip side of the portion where the first welding is performed in the film. Thereafter, the packaging device lowers the movable roller. The movable roller contacts the film from above and guides the film downward. After the movable roller descends to the lower side of the transport path, the packaging device transports the base to the upstream side in the transport direction (hereinafter, the transport distance of the base at this time is referred to as a first distance). A packaging apparatus welds the upstream edge part of a conveyance direction of a base, and a film with a heater. The second welding of the pedestal and the film is performed.

JP 2014-97838 A

  A packaging device is conceivable in which the first and second welding positions with respect to the pedestal are further brought closer to the center side in the conveying direction of the pedestal. In this case, the heater needs to be arranged at a position further away from the pedestal guide roller to the downstream side so that the pedestal conveyed upstream does not come into contact with the film extending between the film roll and the pedestal guide roller. is there. Therefore, the remaining film tends to be long. In addition, since the first and second weldings are performed by the same heater, the first distance is not easily shortened. Therefore, when the pedestal is transported to the upstream side in the transport direction, the remaining film may be bent in a bellows shape and the film may be clogged.

  The objective of this invention is providing the packaging apparatus which suppresses that a film is jammed with conveyance of a base.

  The packaging device according to the present invention supports a conveyance mechanism that conveys a pedestal on which an article is placed along a predetermined conveyance path, and a film roll on which a film is wound so as to be rotatable above the conveyance path. A supporting mechanism, a clamping state in which the film fed out from the film roll and below the transport path is sandwiched at a predetermined position in a transport direction in which the base is transported, and the film at the predetermined position is released. A crossing mechanism that has a holding mechanism that switches to a released state and a contact member that can contact from one side of the film fed from the film roll from above, and that is a position in the transport direction that is downstream from the predetermined position. A moving mechanism that moves the contact member from the upper side of the conveying path to the lower side of the conveying path along a moving path that intersects the conveying path at a position. A mechanism having a first heater, provided between the crossing position and the predetermined position in the transport direction and below the transport path, wherein the first heater is close to the transport path A first heating mechanism that is movable between a first proximity position that moves and a first separation position where the first heater is separated from the conveyance path, and a second heater, and the intersection position in the conveyance direction A mechanism provided between the first heating mechanism and below the transport path, wherein the second heater is close to the transport path, and the second heater is transported. A second heating mechanism movable between a second separation position separated from the path, a heater moving mechanism for moving the first heating mechanism and the second heating mechanism, the first heater and the second heater, respectively. Heating units for heating A cutting mechanism for cutting the film located between the intersecting position and the second heater in the conveying direction in a direction parallel to the conveying path and the moving path; the conveying mechanism; the clamping mechanism; A moving mechanism, the heater moving mechanism, the heating unit, and a control unit that controls the cutting mechanism, the control unit controlling the transport mechanism, and the clamping mechanism and the film roll in the clamping state A first transport process for transporting the pedestal upstream from the film to the position in the transport direction above the first heater, and after the execution of the first transport process, the heater moving mechanism And the heating unit, the first heater is moved from the first separation position to the first proximity position, and the first heater is moved to a first temperature at which the film can be dissolved. After performing the first heating process to be heated and the first heating process, the clamping mechanism and the heater moving mechanism are controlled to switch the clamping mechanism from the clamping state to the released state, and to the first heater Moving to the first separation position, after the execution of the moving process, a second transfer process for transferring the pedestal to a position in the transfer direction that is downstream of the intersection position, and the second After carrying out the transfer process, the moving mechanism is controlled to lower the contact member on the upper side of the transfer path to the lower side of the transfer path, and after the lowering process, the pedestal is A third transport process for transporting the film spanning between the support mechanism and the clamping mechanism to a position in the transport direction downstream and above the second heater; and after execution of the third transport process The above A cutting process for controlling the cutting mechanism to cut the film; and after the cutting process is executed, the heater moving mechanism and the heating unit are controlled to move the second heater from the second separation position to the second proximity position. And the second heater is heated to a second temperature at which the film can be dissolved.

  According to the above configuration, the base on which the article is placed is transported while the control unit executes the first transport process while pushing the film that spans the support mechanism and the clamping mechanism to the downstream side. The film is unwound from the film roll as the pedestal is conveyed, and covers the pedestal and the article from the lower side and the downstream side. When the control unit executes the first heat treatment, the first welding of the film to the pedestal is executed. The control unit sequentially performs the movement process and the second conveyance process, so that the pedestal is conveyed while pushing the film further downstream. Of the film, the remaining film, which is a portion on the tip side of the portion where the first welding is performed, is conveyed downstream together with the pedestal. The film is unwound from the film roll with the execution of the second transport process, and covers the pedestal and the article from above. When the control unit executes the lowering process, the contact member descends while pushing down the film. The film is unwound from the film roll as it is pushed down by the contact member, and covers the base and the article from the upstream side. The pedestal is transported upstream by the control unit executing the third transport process. The film is unwound from the film roll as it is conveyed upstream of the pedestal, and covers the pedestal and the article from below. The controller performs the cutting process and the second heating process in order, so that the second welding of the film to the pedestal is performed. Thereby, a base and an article are packaged with a film. In the above wrapping operation, the first welding is performed by the first heater located on the predetermined position side of the second heater. Therefore, the remaining film is unlikely to be long. Further, the second welding is performed by the second heater that is separated from the predetermined position downstream of the first heater. Accordingly, the transport distance of the pedestal accompanying the execution of the third transport process is unlikely to be long. Therefore, even if the pedestal is transported to the upstream side with the execution of the third transport process, the packaging device can suppress the remaining film from being bent due to contact with other members. Therefore, the packaging apparatus can suppress film clogging associated with the packaging operation.

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 pressing mechanism 39. FIG. 7 is a perspective view of a heating mechanism 86. FIG. 5 is a perspective view of a first heater moving mechanism 430. FIG. 4 is a perspective view of a rotation suppression mechanism 80. FIG. 2 is a block diagram showing an electrical configuration of the packaging device 1. FIG. It is a flowchart of a packaging process. It is a figure which shows the packaging process by a packaging process. It is a figure which shows the packaging process by the packaging process following FIG. It is a figure which shows the packaging process by the packaging process following FIG. It is a graph which shows the temperature change of the 1st heater 861A. It is a figure which shows the packaging process by the packaging process following FIG. It is a figure which shows the packaging process by the packaging process following FIG. It is a figure which shows the packaging process by the packaging process following FIG. It is a figure which shows the packaging process by the packaging process following FIG. It is a figure which shows the packaging process by the packaging process following FIG. It is a figure which shows the packaging process by the packaging process following FIG. It is a figure which shows the packaging process by the packaging process following FIG. It is a figure which shows the packaging process by the packaging process following FIG. It is a conceptual diagram in the side view of the base 2 which packaging completed. It is a conceptual diagram in the planar view of the base 2 which packaging completed.

  Embodiments of the present invention will be described below with reference to the drawings. The packaging device 1 wraps the article 3 by covering the article 3 placed on the base 2 such as a mount with a film 24 and fixing the article 3 to the base 2. 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 an upstream side and a downstream side 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 FIG. 9). The conveyance path 103 is parallel to the left-right direction. 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 the motor 222 (see FIG. 7) via pulleys (not shown), shaft members (not shown), gears (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. 9) 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.

<Pressing mechanism 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 a “pressing mechanism 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 pressing mechanism 39 can move in the vertical direction. FIG. 9 shows a state in which the pressing mechanism 39 is disposed at the top. 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 pressing mechanism 39 is disposed at the lowest position (see FIG. 15), the pair of support members 34 are disposed on both the left and right sides with respect to the conveyance path 103, and the pressing rollers 30 to 32 are disposed below the conveyance path 103. The pressing roller 33 is disposed above 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. 9). 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. The position where the transport path 103 and the movement path 104 intersect is called “intersection position 105” (see FIG. 9). The intersection position 105 is located on the downstream side of the second heating unit 495 (see FIG. 9).

<Holding mechanism 70 (pedestal guide roller 71, holding member 72)>
As shown in FIG. 9, 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. 7). By the rotation of the pair of support members, the holding member 72 is located closer to the pedestal guide roller 71 from the downstream side (see FIG. 9), and the holding member 72 is moved downstream and lower than the pedestal guide roller 71. It rotates between positions that are separated (see FIG. 13). 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 “clamping state” (see FIG. 9). 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” (see FIG. 13). 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. 4 and 5. The heating mechanism 86 includes a first heater moving mechanism 430. 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 below the conveyance path 103 (see FIG. 9). The first heater moving mechanism 430 is provided on the downstream side of the predetermined position 106. The first heater moving mechanism 430 includes a left fixed plate 402, a right fixed 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 base part 421 includes a connecting wall part 421A and a supporting wall part 421B. The connecting wall portion 421A has a substantially rectangular shape that is long in the left-right direction when viewed from the downstream side. The support wall portion 421B protrudes toward the upstream side from the upper end portion of the connection wall portion 421A. 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 (not shown) is provided on the right surface of the cylindrical portion 423. The detected portion is a plate 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 above. Each of the first upper sensor 411 and the first lower sensor 412 is a transmissive sensor that can detect a detected portion (not shown) of the cylindrical portion 423. The first upper sensor 411 detects the detected part of the base part 421 at the upper end position of the movable range. The first lower sensor 412 detects the detected part of the base part 421 at the lower end position of the movable range.

  The first mounting member 427 is supported on the support wall portion 421B of the pedestal portion 421. The first mounting member 427 has a box shape that is long in the left-right direction and opens upward. The first replacement unit 440 is detachably mounted inside the first mounting member 427.

  The first replacement unit 440 includes a first holding unit 442 and five first heating units 445. The first holding portion 442 is a plate-like member that is attached to the first attachment member 427. The five first heating units 445 are held by the first holding unit 442 and are arranged at equal intervals along the left-right direction. Each first heating unit 445 has a substantially rectangular parallelepiped shape that is long in the left-right direction. Each first heating unit 445 includes a first heater 861A (see FIG. 7). The first heater 861A is a plate member made of iron chrome, and is a resistance heating type heater that generates heat when energized. The five first heaters 861A are connected in series with each other, and are switched between an energized state and a non-energized state by the first relay 861B (see FIG. 7). The temperature of each first heater 861A is detected by a first thermistor 413 (see FIG. 7).

  The first heating unit 445 can move between a first proximity position (see FIG. 11) and a first separation position (see FIG. 9) 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 first heating unit 445 located at the first proximity position approaches the transport path 103 from below. 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 to 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 rotation axis of the second heater moving mechanism 460 corresponds to the rotation shaft 431 (see FIG. 5), the motor 224 corresponds to the motor 223, and the pedestal portion 481 corresponds to the pedestal portion 421. On the left surface of the right fixing plate 464, a second upper sensor 451 (see FIG. 7) and a second lower sensor 452 (see FIG. 7) are sequentially fixed 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. The 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 replacement unit 490 includes a second holding unit 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. 7). The second heater 862A corresponds to the first heater 861A. The five second heaters 862A are connected in series with each other, and are switched between an energized state and a non-energized state by the second relay 862B (see FIG. 7). The temperature of each second heater 862A is detected by a second thermistor 453 (see FIG. 7).

  As the pedestal 481 moves up and down as the motor 224 is driven, the second heating unit 495 can move between the second proximity position (see FIG. 19) and the second separation position (see FIG. 9). is there. The second heating unit 495 in the second proximity position approaches the transport path 103 from below. The second heating unit 495 at the second separation position is separated downward with respect to the transport path 103 as compared to the case at the second proximity position.

<Rotation suppression mechanism 80>
The rotation suppression mechanism 80 shown in FIG. 4 is provided on the downstream side of the second heating unit 495 and below the conveyance path 103 (see FIG. 9). 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 pressing mechanism 39 (see FIG. 9). The length in the left-right direction of the grip roller 81 is substantially equal to the length in the left-right direction of the pressing roller 30 (see FIG. 3) of the pressing mechanism 39. 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. 9, 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 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 (see FIG. 8) 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). Each of the first upper sensor 411 and the first lower sensor 412 outputs 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 and the second heater 862A, 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 heaters 861A and five second heaters 862A. In FIG. 8, only one of the six members is shown.

  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.

<Packaging processing>
With reference to FIGS. 8-22, the packaging process performed by CPU201 of the packaging apparatus 1 is demonstrated. The user operates the operation unit 206 to turn on the packaging device 1. The CPU 201 starts the packaging process by reading and executing the program stored in the flash ROM 202. 9 to 11 and FIGS. 13 to 20 all show sectional views taken along the line AA in FIG.

  As shown in FIG. 9, the CPU 201 initializes the state of the packaging device 1 (S1). Specifically, it is as follows. The CPU 201 controls the driving unit 211 to drive the motor 221 and arranges the pressing mechanism 39 at the top (see FIG. 9). 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. Thereby, the grip roller 81 becomes rotatable. The CPU 201 controls the first relay 861B and the second relay 862B to stop energization of the first heater 861A and the second heater 862A.

  The user manually unwinds the film 24 from the film roll 22 and sandwiches the film 24 from both sides in the transport direction with the rollers 654A and 654B. The user further manually unwinds the film 24 from the film roll 22 and places the film 24 on the upstream side of the pressing roller 33. The user further manually unwinds the film 24 from the film roll 22, and places the lower end portion (that is, the front end portion) of the film 24 below the transport path 103 (see FIG. 9) and downstream of the pedestal guide roller 71. Arrange. The user places the first plate-like portion 905 of the base 2 on the receiving surface 12A of the receiving base 12 (see FIG. 1). The base 2 is positioned by attaching the first plate-like portion 905 to the transport portion 60 (see FIG. 1). The positioned base 2 comes into contact with the base sensor 410. The pedestal sensor 410 outputs an ON signal to the CPU 201.

  The CPU 201 determines whether a start instruction input operation for instructing the start of packaging has been detected via the operation unit 206 (S3). When the CPU 201 determines that an input operation of a start instruction is not detected (S3: NO), the process returns to S3. If the CPU 201 determines that an input operation of a start instruction has been detected (S3: YES), the process proceeds to S5.

  The CPU 201 controls the drive unit 216 to drive the motor 226, and switches the holding mechanism 70 from the released state to the sandwiched state (S5). The holding member 72 rotates to a position close to the pedestal guide roller 71 from the downstream side. Accordingly, the holding mechanism 70 sandwiches the leading end portion of the film 24 between the holding member 72 and the pedestal guide roller 71. The film 24 spans between the film roll support portion 11A (see FIG. 1) and the holding mechanism 70 in an extended posture (see FIG. 9).

  The CPU 201 controls the drive unit 217 to rotate the motor 227 and starts to rotate the film roll 22 in the feeding direction (arrow 171 in FIG. 9) (S7). The feeding direction is the rotation direction of the film 24 that feeds the film 24, and is clockwise in this example. As shown in FIG. 9, the film 24 stretched between the film roll support portion 11A and the holding mechanism 70 changes from an extended posture to a relaxed posture.

  As shown in FIG. 8, the CPU 201 controls the driving unit 212 to drive the motor 222, and conveys the base 2 to a position where the central portion 905 </ b> A (see FIG. 1) is above the first heating unit 445. (S9). Details are as follows. As shown in FIGS. 9 and 10, the CPU 201 drives the motor 222 to rotate the belts 511 and 512 counterclockwise. The transport unit 60 (see FIG. 2) in the mounting position transports the base 2 to the downstream side (arrow 182 in FIG. 10). The downstream end of the first plate-like portion 905 of the pedestal 2 passes over the pedestal guide roller 71 after contacting the film 24. The 1st plate-shaped part 905 of the base 2 pushes the film 24 downstream. Since the leading end portion of the film 24 is sandwiched between the pedestal guide roller 71 and the holding member 72, the film 24 wraps around the lower surface of the first plate-like portion 905 of the pedestal 2 being conveyed. Thereby, the packaging device 1 executes the first round of the film 24 with respect to the lower surface of the first plate-like portion 905.

  With the execution of S9 by the CPU 201, the transport unit 60 transports the base 2 to the downstream side of the base sensor 410 (see FIG. 2). The pedestal sensor 410 outputs an OFF signal to the CPU 201 instead of the ON signal. The CPU 201 specifies the length of the base 2 in the transport direction based on the time from when the transport of the base 2 is started until the base sensor 410 outputs an OFF signal and the transport speed of the base 2. In addition, the conveyance speed of the base 2 is specified from the pulse signal output from the encoder 232. The CPU 201 specifies the first transport distance of the base 2 based on the length of the base 2 and the transport speed of the base 2. The first transport distance is a transport distance necessary for transporting the central portion 905A of the first plate-like portion 905 to a position above the first heating unit 445. The first transport distance is indicated by the dimension S in FIG. In accordance with the pulse signal output from the encoder 232, the CPU 201 specifies the number of rotations of the motor 222 after starting the conveyance of the base 2. The CPU 201 determines whether or not the pedestal 2 has been transported for the first transport distance based on the identified number of rotations of the motor 222. When the CPU 201 determines that the pedestal 2 has been transported by the first transport distance, the CPU 201 stops driving the motor 222 (S9). The pedestal 2 stops at a position in the transport direction in which the central portion 905A is above the first heating unit 445 (see FIG. 9). In this example, the pedestal 2 stops at a position upstream of the intersection position 105.

  As illustrated in FIG. 8, the CPU 201 controls the driving unit 213 to drive the motor 223, and raises the five first heating units 445 from the first separation position to the first proximity position (S11). When the first upper sensor 411 (see FIG. 5) outputs an ON signal instead of the OFF signal, the CPU 201 stops driving the motor 223. In this example, the first heating units 445 that have risen to the first proximity position each sandwich the film 24 with the lower surface of the first plate-like portion 905 (see FIG. 11).

  The CPU 201 controls the first relay 861B, energizes the first heater 861A, and heats the first heater 861A to the first temperature (t1 shown in FIG. 12) (S13). The first temperature is higher than 130 degrees, which is the melting point of the film 24, and specifically 160 degrees. The CPU 201 controls the temperature of the first heater 861A by PID control while monitoring the temperature detected by the first thermistor 413. Specifically, the CPU 201 controls the first relay 861B according to the difference between the first temperature and the temperature detected by the first thermistor 413, and a state in which the first heater 861A is energized and a state in which the first heater 861A is not energized. Switch to repeatedly. Further, when the CPU 201 switches to the state in which the first heater 861A is energized, the CPU 201 increases or decreases the energization amount (current value) for energizing the first heater 861A. As shown in FIG. 12, the temperature of the first heater 861A repeatedly changes to a temperature above the first temperature and a temperature below the first temperature, and the difference between the temperature of the first heater 861A and the first temperature is , Get smaller over time. Thereafter, the temperature of the first heater 861A becomes the first temperature.

  When the CPU 201 executes S <b> 13, the first heater 861 </ b> A heats a portion that is closer to the film roll 22 than the front end of the film 24 in the extending direction of the film 24. The film 24 is dissolved by being heated. The melted film 24 is welded to the lower surface of the first plate-like portion 905. As a result, the CPU 201 executes the first welding. Hereinafter, the portion of the film 24 where the first welding has been performed is referred to as a “first welding portion 24A” (see FIG. 13), and the portion located on the tip side of the first welding portion 24A is referred to as a “residual film 24B”. (See FIG. 13). The CPU 201 controls the first relay 861B after a predetermined time has elapsed from the start of heating of the first heater 861A, stops energization of the first heater 861A, and stops heating of the first heater 861A.

  The CPU 201 controls the driving unit 213 to drive the motor 223, and lowers the five first heating units 445 from the first proximity position to the first separation position (S15). When the first lower sensor 412 (see FIG. 5) outputs an ON signal instead of the OFF signal, the CPU 201 stops driving the motor 223. As shown in FIG. 13, the five first heating units 445 are respectively separated downward from the transport path 103.

  As illustrated in FIG. 8, the CPU 201 controls the driving unit 216 to drive the motor 226 to switch the holding mechanism 70 from the sandwiched state to the released state (S17). The holding mechanism 70 releases the front end portion of the sandwiched film 24 (see FIG. 13).

  CPU201 controls actuator 212, drives motor 222, and conveys pedestal 2 to the lower stream side of a conveyance direction (S19). As shown in FIG. 14, the pedestal 2 passes through the intersection position 105 while pushing the film 24 to the downstream side. The pedestal 2 moves further downstream. The motor 227 continues to rotate the film roll 22 in the feeding direction (arrow 171), and the film 24 is fed from the film roll 22. The film 24 fed out from the film roll 22 is bent at a portion in contact with the upstream side of the pressing roller 33 and extends downstream, and reaches the first plate-like portion 905 of the base 2 and the downstream side of the article 3. The film 24 is disposed at a position covering the first plate-like portion 905 of the base 2 and the upper side of the article 3. That is, the film 24 covers the base 2 and the article 3 from the downstream side and the upper side. The pressing rollers 30 to 32 are arranged above the film 24 extending above the base 2 and the article 3.

  As shown in FIG. 8, when the rear end portion of the base 2 is conveyed to a position downstream of the intersection position 105, the CPU 201 controls the driving unit 212 to stop the motor 222 (S21). Details of the execution of S21 by the CPU 201 are as follows. The CPU 201 specifies the second transport distance of the base 2. The second transport distance is a transport distance necessary for the base 2 transported by the first transport distance to be transported downstream from the intersection position 105. For example, the CPU 201 conveys the pedestal 2 that has been identified as the distance necessary for the upstream end of the pedestal 2 that has been conveyed by the first conveyance distance to move downstream from the intersection position 105 when executing S9. Identifies based on length. Thereby, CPU201 specifies the 2nd conveyance distance. The CPU 201 starts transporting the pedestal 2 to the downstream side in the process of S 19, and then monitors the pulse signal output from the encoder 232, thereby transporting the pedestal 2 by the second transport distance, The driving is stopped (S21). In this example, CPU201 performs S19 and S21, and the base 2 passes the upper direction of the 2nd heating unit 495, and the crossing position 105 in order (refer FIG. 14). The pedestal 2 stops when transported to a position where it is placed on the receiving surface 13A of the cradle 13 (see FIG. 14). Even after the pedestal 2 is conveyed to the cradle 13, the motor 227 continues to rotate the film roll 22 in the feeding direction.

  The CPU 201 controls the drive unit 211 to drive the motor 221 to move the pressing mechanism 39 from the highest level to the lowest level (S23). As shown in FIG. 15, the pressing roller 30 moves from the highest position to the lowest position along the movement path 104 (see FIG. 14). In the process of movement, the pressing rollers 30 and 32 come into contact with one surface of the film 24 in a state of being disposed below from the upper side, and push the film 24 downward. The film 24 covers the first plate-like portion 905 of the base 2 and the downstream side, the upper side, and the upstream side of the article 3. With the pressing mechanism 39 disposed at the lowest position, the pressing roller 30 meshes with the grip roller 81. The film 24 is sandwiched between the grip roller 81 and the pressing roller 30. The pressing roller 31 contacts the conveyance path 103 from below.

  As shown in FIG. 8, the CPU 201 controls the drive unit 217 to drive the motor 227, and starts to rotate the film roll 22 in the winding direction (S25). In the initialization process of S1, energization to the electromagnetic brake 82 is stopped. For this reason, the grip roller 81 and the pressing roller 30 are in a rotatable state. Therefore, as shown in FIG. 16, the film 24 is wound around the film roll 22 in accordance with the rotation of the motor 227 (arrow 172). Tension acts on the film 24. Due to the tension acting on the film 24, the film 24 adheres to the base 2 and the article 3.

  As shown in FIG. 8, the CPU 201 controls the drive unit 212 to drive the motor 222, and moves the pedestal 2 upstream to a position where the central portion 905 </ b> A (see FIG. 1) is above the second heating unit 495. (S27). CPU201 specifies the 3rd conveyance distance. The third transport distance is a transport distance necessary for transporting the central portion 905A transported to the downstream side of the intersection position 105 by the process of S21 to a position above the second heating unit 495. The third transport distance corresponds to the dimension N shown in FIG. The method by which the CPU 201 specifies the third transport distance and the method by which the CPU 201 transports the base 2 by the third transport distance are the same as S9, S19, and S21.

  As shown in FIG. 17, when the CPU 201 executes S27, the base 2 placed on the receiving surface 13A is transported upstream. The upstream end of the first plate-like portion 905 of the pedestal 2 contacts the film 24 and pushes it upstream. The first plate-like portion 905 of the pedestal 2 enters from the downstream side between the pair of support members 34 of the push-down mechanism 39 after passing over the intersection position 105. The pressing roller 31 of the pressing mechanism 39 contacts the lower surface of the base 2 and guides the base 2 to the upstream side. The upstream end portion of the first plate-like portion 905 of the pedestal 2 passes above the five second heating units 495 and moves upstream. The surplus film 24B and the first welded portion 24A sequentially pass through the intersection position 105. The film 24 contacts the upstream end of the first plate-like portion 905 of the base 2 and bends downstream. As the pedestal 2 moves to the upstream side, the pressing roller 30 and the grip roller 81 rotate, and the film 24 is pulled out. The film 24 drawn to the upstream side from between the pressing roller 30 and the grip roller 81 wraps around the lower surface of the first plate-like portion 905 and covers the first welded portion 24A and the surplus film 24B from the lower side. Thereby, the packaging device 1 executes the second wraparound of the film 24 with respect to the lower surface of the first plate-like portion 905. The upstream end of the base 2 passes through a predetermined position 106. When the pedestal 2 is transported to a position where the central portion 905A of the first plate-like portion 905 is above the second heating unit 495, the CPU 201 controls the driving of the driving unit 212 and stops driving the motor 222. (S27). At this time, the base 2 is located on the downstream side of the film 24 that spans between the film roll 22 and the holding mechanism 70. Further, the first welded portion 24 </ b> A and the remaining film 24 </ b> B are located on the upstream side of the second heating unit 495.

  As shown in FIG. 8, the CPU 201 starts energizing the electromagnetic brake 82 and restricts the rotation of the grip roller 81 (S29). As a result, the portion of the film 24 that is sandwiched between the grip roller 81 and the pressing roller 30 cannot be moved. The CPU 201 controls the drive unit 217 to stop the rotation of the motor 227 (S31). The winding of the film 24 onto the film roll 22 is stopped. The tension applied to the film 24 by the winding of the film 24 is maintained.

  The CPU 201 controls the drive unit 215 to drive the motor 225 and cuts the film 24 in the left-right direction (S33). When the motor 225 is driven, the cutting portion 77 (see FIG. 17) moves from the left side to the right side along the guide rail 74. As shown in FIG. 17, the film 24 is a portion that extends between the pressing roller 30 and the pressing roller 30, and the blade portion 771, at a portion extending between the pressing roller 30 and the pressing roller 30 than the portion sandwiched between the grip roller 81 and the pressing roller 30. Disconnected. The cutting part 77 cuts off the part of the film 24 that covers the first plate-like part 905 and the article 3 of the base 2 from the film roll 22 side.

  After the film 24 is cut, the portion of the film 24 cut off from the film roll 22 side tends to come off from the portion sandwiched between the grip roller 81 and the pressing roller 30 due to the tension acting on the film 24. However, since the grip roller 81 and the pressing roller 30 are fitted and the film 24 is sandwiched therebetween, the film 24 cannot be removed from the portion sandwiched between the grip roller 81 and the pressing roller 30. On the other hand, the cut end of the film 24 extending from the film roll 22 is on the downstream side of the pedestal guide roller 71.

  As shown in FIG. 8, the CPU 201 controls the drive unit 217 to drive the motor 227, thereby rotating the film roll 22 in the winding direction by a predetermined rotation amount (S35). As shown in FIG. 18, when the film roll 22 rotates in the winding direction by a predetermined rotation amount, the film roll 22 is wound by a predetermined amount. Thereby, the front-end | tip part of the film 24 extended from the film roll 22 is wound up to the position which hangs down from the base guide roller 71. FIG.

  As shown in FIG. 8, 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 to the second proximity position (S37). When the second upper sensor 451 (see FIG. 7) outputs an ON signal instead of the OFF signal, the CPU 201 stops driving the motor 224. As shown in FIG. 19, the second heating unit 495 rises from the second separation position to the second proximity position. The five second heating units 495 that have moved up to the second proximity position include a film 24 that covers the lower surface of the first plate-shaped portion 905 for the first time, and a film 24 that covers the lower surface of the first plate-shaped portion 905 for the second time. Are sandwiched between the first plate-shaped portion 905.

  As shown in FIG. 8, the CPU 201 controls the second relay 862B, energizes the second heater 862A, and heats the second heater 862A to the second temperature (S39). The second temperature is lower than the first temperature, specifically 130 degrees which is the melting point of the film 24. The CPU 201 controls the temperature of the second heater 862A by PID control while monitoring the temperature detected by the second thermistor 453. The specific control method is the same as S13. The heated second heater 862A welds the film 24 that covers the lower surface of the first plate-shaped portion 905 for the second time to the film 24 that covers the lower surface of the first plate-shaped portion 905 for the first time. That is, the films 24 are welded together. Thereby, the second welding with respect to the film 24 is performed.

  The second temperature is lower than the temperature (first temperature) of the first heater 861A when the film 24 is welded to the base 2. Therefore, when the second welding is performed, the film 24 is not welded to the lower surface of the first plate-shaped portion 905. The CPU 201 controls the second relay 862B, stops energization of the second heater 862A, and stops the heating of the second heater 862A after a predetermined time has elapsed from the start of heating of the second heater 862A. Hereinafter, the portion of the film 24 where the second welding has been performed is referred to as a “second welding portion 24C” (see FIG. 21). The second welded portion 24C is located on the downstream side with respect to the first welded portion 24A (see FIG. 21).

  The CPU 201 controls the driving unit 214 to drive the motor 224, and lowers the second heating unit 495 from the second proximity position to the second separation position (S41). The second heating unit is separated downward from the conveyance path 103 (see FIG. 20). The CPU 201 controls the driving unit 216 to drive the motor 226 to switch the holding mechanism 70 from the released state to the sandwiched state. As shown in FIG. 20, the holding mechanism 70 holds the leading end portion of the film 24 drawn from the film roll 22 between the pedestal guide roller 71 and the holding member 72.

  As shown in FIG. 8, the CPU 201 stops energization of the electromagnetic brake 82 and makes the grip roller 81 rotatable (S45). The CPU 201 controls the drive unit 212 to drive the motor 222 and conveys the pedestal 2 whose packaging has been completed to the receiving table 13 (S47). The grip roller 81 rotates to guide the base 2 to the downstream side. The CPU 201 monitors the pulse signal output by the encoder 232, and stops driving the motor 222 when the pedestal 2 is transported to the receiving surface 12A of the cradle 13 (S47). The CPU 201 stops the packaging process, and the pedestal 2 and the article 3 whose packaging is completed are placed on the receiving surface 13A. The user can take out the pedestal 2 and the article 3 whose packaging has been completed from the packaging device 1 by removing the pedestal 2 from the transport unit 60 (see FIG. 2).

  As shown in FIGS. 21 and 22, the film 24 is packaged by winding the pedestal 2 and the article 3 one or more times around the belt-like film 24. The article 3 is placed on the first plate-shaped portion 905 including the central portion 905A, and the first welded portion 24A is welded to the lower surface of the central portion 905A of the first plate-shaped portion 905. That is, the first welded portion 24 </ b> A is formed below the article 3.

<Main effects of the above embodiment>
As described above, the CPU 201 executes the packaging process. Accordingly, the packaging device 1 performs the welding twice on the lower side of the central portion 905A of the first plate-like portion 905 by the first heating unit 445 and the second heating unit 495, and the base 2 and the article 3 Can be wrapped with a film 24. For example, the case where the packaging apparatus 1 wraps the base 2 only by the first heating unit 445 can be considered. However, even if the CPU 201 executes the process corresponding to S27, the pedestal 2 comes into contact with the film 24 extending between the film roll 22 and the holding mechanism 70, so that the packaging operation is hindered. Moreover, the case where the packaging apparatus 1 packages the base 2 only by the 2nd heating unit 495 can be considered. However, when the CPU 201 executes the process corresponding to S9, the base 2 needs to move to a position above the second heating unit 495. For this reason, both the 1st conveyance distance and the surplus film 24B become longer than the said embodiment. In other words, the packaging device 1 performs the welding twice by the first heating unit 445 and the second heating unit 495, so that the packaging device 1 is appropriately twice under the central portion 905A of the first plate-like portion 905. Can perform welding. In addition, the packaging device 1 performs the first welding by the first heating unit 445 located on the upstream side of the second heating unit 495. Accordingly, the first transport distance (dimension S in FIG. 10) is shortened, so that the remaining film 24B is unlikely to be long. In addition, the packaging device 1 performs the second welding by the second heating unit 495 that is downstream of the first heating unit 445. Therefore, the third transport distance (dimension N in FIG. 17) is unlikely to be long. Therefore, even when the packaging device 1 conveys the pedestal 2 upstream (S27), the packaging device 1 can suppress the remaining film 24B from contacting other members and bending into a bellows shape. Therefore, the packaging apparatus 1 can suppress clogging of the film 24 accompanying the packaging operation.

  The first welded portion 24A is formed below the first plate-like portion 905. The article 3 is easily placed on the first plate-like portion 905. Therefore, even if the pedestal 2 and the article 3 that have been packaged fall from the cradle 13 and a sudden force is applied to the pedestal 2 and the article 3, the film 24 remains on the pedestal 2. It is hard to slip.

  After winding up the cut film 24 connected to the film roll 22 (S35), the CPU 201 raises the second heating unit 495 to the second proximity position (S37), and sets the temperature of the second heater 862A to the second temperature. Heat to temperature (S39). Therefore, the packaging device 1 can suppress the film 24 connected to the film roll 22 from being heated as the temperature of the second heater 862A increases.

  The CPU 201 controls the temperature of the first heater 861A and the second heater 862A by PID control. Accordingly, the packaging device 1 can cause the temperatures of the first heater 861A and the second heater 862A to reach the predetermined temperatures in a short time.

<Modification>
The present invention is not limited to the above embodiment, and various modifications are possible. After lowering the first heating unit 445 from the first proximity position to the first separation position (S15), the CPU 201 switches the holding mechanism 70 from the sandwiched state to the released state (S17). Instead, the CPU 201 may lower the first heating unit 445 to the first separation position after switching the holding mechanism 70 to the released state.

  The CPU 201 raises the temperature of the first heater 861A to the first temperature after raising the first heating unit 445 from the first separation position to the first proximity position (S11) (S13). Instead of this, the CPU 201 may raise the temperature of the first heater 861A to the first temperature and then raise the first heating unit 445 to the first proximity position. Similarly, the CPU 201 may raise the temperature of the second heater 862A to the second temperature and then raise the second heating unit 495 from the second separation position to the second proximity position.

  CPU201 specifies the length of the conveyance direction of base 2 based on the detection result of base sensor 410, and specifies the 1st conveyance distance (S9). Instead of this, the first transport distance is a predetermined transport distance, and may be written in a program for executing the packaging process. For example, when the base 2 has a predetermined shape, the CPU 201 does not need to specify the length of the base 2 in the transport direction. The CPU 201 can stably perform the first welding of the film 24 on the lower surface of the central portion 905A of the first plate-like portion 905. In this case, a mark by printing or the like may be formed on the upper surface of the first plate-like portion 905 of the base 2 in a portion corresponding to the central portion 905A. The user can more easily place the article 3 on the central portion 905A. Therefore, the film 24 is not easily displaced with respect to the pedestal 2 even when a sudden force due to dropping or the like acts on the pedestal 2 and the article 3 for which packaging has been completed.

  The CPU 201 performs the PID control in each case of heating the first heater 861A to the first temperature (S13) and heating the second heater 862A to the second temperature (S39). P control may be executed or PI control may be executed. Even in this case, the temperatures of the first heater 861A and the second heater 862A can reach the target temperatures in a short time.

<Others>
The belts 511 and 512, the transport unit 60, and the motor 222 are examples of the “transport mechanism” of the present invention. 11 A of film roll support parts are examples of the "support mechanism" of this invention. The holding mechanism 70 is an example of the “clamping mechanism” in the present invention. The pressing roller 30 is an example of the “contact member” in the present invention. The pressing mechanism 39 and the motor 221 are examples of the “moving mechanism” in the present invention. The first heating unit 445 is an example of the “first heating mechanism” in the present invention. The second heating unit 495 is an example of the “second heating mechanism” in the present invention. The first heater moving mechanism 430 and the second heater moving mechanism 460 are examples of the “heater moving mechanism” in the present invention. The first relay 861B and the second relay 862B are examples of the “heating unit” in the present invention. The cutting unit 77 is an example of the “cutting mechanism” in the present invention. The motor 227 is an example of the “driving means” in the present invention. The first thermistor 413 and the second thermistor 453 are examples of the “thermistor” of the present invention. The CPU 201 is an example of the “control unit” in the present invention. The central portion 905A is an example of the “contact portion” in the present invention.

  S9 is an example of the “first transport process” in the present invention. S11 and S13 are examples of the “first heat treatment” in the present invention. S15 and S17 are examples of the “movement process” in the present invention. S19 and S21 are examples of the “second transport process” in the present invention. S23 is an example of the “down process” in the present invention. S27 is an example of the “third conveyance process” in the present invention. S33 is an example of the “cutting process” in the present invention. S35 is an example of the “winding process” in the present invention. S37 and S39 are examples of the “second heat treatment” in the present invention. The pedestal sensor 410 is an example of the “detecting means” in the present invention.

DESCRIPTION OF SYMBOLS 1 Packaging apparatus 2 Base 3 Article 11A Film roll support part 22 Film roll 30 Pressing roller 39 Pressing mechanism 70 Holding mechanism 77 Cutting part 103 Transfer path 104 Moving path 105 Crossing position 106 Predetermined position 201 CPU
221, 227 Motor 410 Pedestal sensor 413 First thermistor 430 First heater moving mechanism 445 First heating unit 453 Second thermistor 460 Second heater moving mechanism 495 Second heating unit 511, 512 Belt 861A First heater 861B First relay 862A 2nd heater 862B 2nd relay

Claims (5)

A transport mechanism for transporting a pedestal on which an article is placed along a predetermined transport path;
A support mechanism that rotatably supports a film roll on which a film is wound, above the transport path;
A sandwiching state in which the film that is fed out from the film roll and under the transport path is sandwiched at a predetermined position in a transport direction in which the pedestal is transported, and a release state in which the film in the predetermined position is released A clamping mechanism that switches to
A movement member that has a contact member that can be contacted from above on one side of the film fed from the film roll and intersects the conveyance path at an intersection position that is a position in the conveyance direction that is downstream of the predetermined position. A moving mechanism for moving the contact member along the path from the upper side of the transfer path to the lower side of the transfer path;
A mechanism having a first heater, provided between the intersection position and the predetermined position in the transport direction and below the transport path, wherein the first heater is close to the transport path; A first heating mechanism capable of moving between a first proximity position and a first separation position at which the first heater is separated from the transport path;
A mechanism provided between the crossing position and the first heating mechanism in the transport direction and below the transport path, wherein the second heater is disposed in the transport path. A second heating mechanism capable of moving between a close second proximity position and a second separation position where the second heater is separated from the transport path;
A heater moving mechanism for respectively moving the first heating mechanism and the second heating mechanism;
Heating sections for heating the first heater and the second heater, respectively;
A cutting mechanism that cuts the film between the intersecting position and the second heater in the transport direction in a direction parallel to the transport path and the movement path;
A controller that controls the transport mechanism, the clamping mechanism, the moving mechanism, the heater moving mechanism, the heating unit, and the cutting mechanism;
The controller is
The pedestal on the upstream side of the film that controls the conveyance mechanism and spans the clamping mechanism and the film roll in the clamping state is conveyed to a position in the conveyance direction that is above the first heater. A first conveying process to be performed;
After the execution of the first transport process, the heater moving mechanism and the heating unit are controlled, the first heater is moved from the first separation position to the first proximity position, and the first heater is moved, A first heat treatment for heating the film to a first temperature at which the film can be dissolved;
After execution of the first heat treatment, the clamping mechanism and the heater moving mechanism are controlled, the clamping mechanism is switched from the clamping state to the released state, and the first heater is moved to the first separation position. Move processing to
A second transport process for transporting the pedestal to a position in the transport direction that is downstream of the crossing position after execution of the movement process;
After the execution of the second transport process, the lowering process for controlling the moving mechanism and lowering the contact member on the upper side of the transport path to the lower side of the transport path;
After the lowering process is performed, the pedestal is transported to a position in the transport direction that is downstream of the film that spans between the support mechanism and the clamping mechanism and is above the second heater. Conveyance processing,
After the execution of the third conveyance process, a cutting process for controlling the cutting mechanism and cutting the film;
After executing the cutting process, the heater moving mechanism and the heating unit are controlled to move the second heater from the second separation position to the second proximity position, and the second heater is moved to the film. And a second heat treatment for heating to a meltable second temperature. A detecting means for detecting a length of the pedestal to be conveyed in the conveying direction;
The controller is
In the first transport process, among the three parts of the pedestal divided in three along the transport direction, the central part is transported to the position in the transport direction above the first heater,
2. The packaging device according to claim 1, wherein in the third transport process, the center portion is transported to a position in the transport direction, which is above the second heater. The controller is
In the first transport process, the portion of the pedestal that is in contact with the article is transported to the position in the transport direction that is above the first heater,
3. The packaging device according to claim 2, wherein, in the third transport process, the pedestal is transported to a position in the transport direction in which the contacting portion is located above the second heater. The support mechanism includes a driving unit that rotates the film roll in a winding direction that is a direction in which the film is wound.
The said control part controls the said drive means after execution of the said cutting process, and before execution of the said 2nd heat processing, rotates the said film roll in the said winding direction, and the said film connected with the said film roll The packaging apparatus according to any one of claims 1 to 3, wherein a winding process for moving the tip of the sheet to the predetermined position is performed. A thermistor for detecting the temperature of each of the first heater and the second heater;
The controller is
In the first heat treatment, while monitoring the detection result of the thermistor, the first heater is heated to the first temperature by P control, PI control, or PID control,
5. The heat treatment according to claim 1, wherein, in the second heat treatment, the second heater is heated to the second temperature by P control, PI control, or PID control while monitoring a detection result of the thermistor. The packaging device according to any one of the above.

Images