JP2017081626A - Packaging device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a packaging device which can suppress variation of a length of a film which is fed from a film roll after the film is cut.SOLUTION: A CPU of a packaging device acquires a rotation amount of a winding shaft based on rotation of the winding shaft which is detected by an encoder. The CPU holds a film by a depression roller and a grip roller when an article is packaged with the film (S71). The CPU cuts the film by a cutting part after the film is held (S75). The CPU controls rotation drive of a motor after the film is cut (S84, S85). The CPU controls rotation drive of the motor according to a rotation amount in any period of periods since the film is held in the processing of S71, until a period before the rotation drive of the motor is controlled in the processing of S84, out of acquired rotation amounts of the winding shaft, in processing of S84, S85 (S48, S85).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.

  A packaging device that wraps a pedestal and an article by covering a part of the article with a film while the article is placed on a plate-like pedestal has been proposed. For example, the packaging device described in Patent Document 1 packages a base and an article with a film as follows. The packaging device conveys the pedestal on which the article is placed from the upstream side to the downstream side along the conveyance path toward the film. The packaging device is in a state where tension can be applied to the film fed from the film roll by the torque adjustment mechanism. The packaging apparatus moves the guide roller located upstream of the pedestal on which the article is placed and above the film to the lower side of the conveyance path. As a result, the film is guided below the pedestal. The packaging device conveys the pedestal on which the article is placed from the downstream side toward the upstream side. In this case, since the film is unwound from the film roll as the pedestal moves, the torque adjustment mechanism applies tension to the film. As described above, the film is pressed against the article with a strength corresponding to the tension and is in close contact with the article. A packaging apparatus cut | disconnects the part which contact | adhered to the base and articles | goods among films from a film roll by cut | disconnecting a film by a cutting part.

Japanese Patent Laying-Open No. 2015-30525

  In the packaging device, in order to perform the next packaging operation, it is preferable that the length of the film fed from the film roll is constant after the film is cut. However, for example, in the packaging apparatus described above, the film is cut in a tensioned state. For this reason, when the film is cut and released from the applied tension, the film roll may rotate or the stretched film may return to its original state. In this case, after the film is cut, there is a variation in the length of the portion of the film that is fed from the film roll, and the next packaging operation cannot be performed smoothly. In addition, for example, a user may accidentally rotate the film roll before the film is cut. Also in this case, the film is wound or fed out of the film roll, and the same problem as described above occurs.

  The objective of this invention is providing the packaging apparatus which can suppress the dispersion | variation in the length of the film currently drawn | fed out from the film roll after the cutting | disconnection of a film.

  The packaging apparatus according to the present invention includes a mounting portion on which a film roll having a rotatable winding shaft and a film wound around the winding shaft can be mounted, and is fed out from the film roll mounted on the mounting portion. A packaging device for packaging an article with the film, the holding mechanism holding a part different from the part in which the article is packaged out of the film fed from the film roll attached to the attachment part; Of the film fed from the film roll mounted on the mounting portion, the cutting mechanism that cuts the film roll side portion of the film that is held by the holding mechanism, and the mounting by rotating the film roll Detecting the rotation of the winding shaft and the driving unit for winding or unwinding the film with respect to the film roll mounted on the unit A detection unit; a first acquisition unit configured to acquire a rotation amount of the winding shaft based on the rotation of the winding shaft detected by the detection unit; and the holding mechanism when the article is wrapped by the film. Holding means for holding the film, cutting means for cutting the film by the cutting mechanism after the film is held by the holding means, and the drive unit after the film is cut by the cutting means A rotation control means for controlling the rotation drive of the film, wherein the rotation control means is at least when the film is held by the holding means out of the amount of rotation of the winding shaft obtained by the first obtaining means. To the specific rotation amount before the rotation drive of the drive unit is controlled by the rotation control means. Rolling to control the drive.

  According to the above aspect, the amount of rotation of the winding shaft is acquired based on the rotation of the winding shaft detected by the detection unit. When the article is packaged with a film, a portion of the film that is different from the portion where the article is packaged is held by the holding mechanism. A portion of the film that is closer to the film roll than a portion held by the holding mechanism is cut by the cutting mechanism. The rotation control of the drive unit that winds or unwinds the film with respect to the film roll mounted on the mounting unit is controlled by the rotation control means. Here, the rotation control means controls the rotational drive of the drive unit in accordance with at least the specific rotation amount of the acquired rotation amount of the winding shaft. The specific rotation amount is a rotation amount in any period from when the film is held by the holding unit to before the drive unit is driven to rotate by the rotation control unit. Thereby, the length of the film drawn out from the film roll can be adjusted according to at least the specific rotation amount. Therefore, the packaging device can suppress variations in the length of the film being fed out from the film roll after the film is cut.

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). 3 is a perspective view of a transport mechanism 50. FIG. 4 is a perspective view of the vicinity of the upper ends of side plate members 111 and 112. FIG. It is a perspective view of the film roll 22 periphery. 4 is a perspective view of a pressing mechanism 39. FIG. 4 is a perspective view of a pressing mechanism 39. FIG. 4 is a right side view of a pressing mechanism 39. FIG. 5 is a perspective view of a pedestal guide member 71, a holding member 72, and a rotation suppression mechanism 80. FIG. 4 is a perspective view of a pedestal guide member 71, a rotation suppression mechanism 80, and a film moving mechanism 25. FIG. 4 is a perspective view of a rotation suppression mechanism 80. FIG. 4 is a perspective view of a pressing mechanism 39, a rotation suppression mechanism 80, and a film moving mechanism 25. FIG. 4 is a right side view of the pressing mechanism 39, the rotation suppressing mechanism 80, and the film moving mechanism 25. FIG. It is the right view which expanded the pressing roller 30 and the grip roller 81 vicinity. 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 flowchart of the packaging process which shows the continuation of FIG. It is a flowchart of a monitoring process. It is a figure which shows the packaging process by 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 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 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 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 a packaging process. It is a figure which shows the state of the film 24 in a packaging process. It is a figure which shows the state of the film 24 in a packaging process. It is a flowchart of the packaging process in a modification.

  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 belt-like film 24 and fixing the article 3 to the base 2. 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 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 conveyed on the receiving surfaces 12A and 13A is referred to as a “conveyance path 103” (FIG. 19).

  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.

<Transport mechanism 50>
As shown in FIG. 3, 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 belt 511 is bridged between a pair of pulleys 52A and 52B. The pulley 52 </ b> A is rotatably provided on the upstream side of the right side surface of the cradle 12. The pulley 52 </ b> B is rotatably provided on the downstream side of the right side surface of the cradle 13. The pulleys 52A and 52B are in contact with the inside of the belt 511, and support the belt 511 in a rotatable manner. The belt 512 is stretched over a pair of pulleys 53A and 53B. The pulley 53 </ b> A is rotatably provided on the upstream side of the left side surface of the cradle 12. The pulley 53B is rotatably provided on the downstream side of the left side surface of the cradle 13. The pulleys 53A and 53B are in contact with the inside of the belt 512 and support the belt 512 rotatably.

  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 conveying unit 60 is provided on each outer surface of the belts 511 and 512. The conveyance unit 60 includes a right conveyance unit 61 provided on the belt 511 and a left conveyance unit 62 provided on 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. In the transport unit 60, the right transport unit 61 and the left transport unit 62 face each other in the left-right direction.

  The right transport unit 61 includes a first transport unit 61A and a second transport unit 61B. The first transport unit 61A and the second transport unit 61B are separated in the transport direction. In the first conveyance unit 61A, a portion of the upstream side surface that is close to the belt 511 is recessed downstream. The left transport unit 62 includes a first transport unit 62A and a second transport unit 62B. The first transport unit 62A and the second transport unit 62B are separated in the transport direction. In the first conveyance unit 62A, a portion of the upstream side surface close to the belt 512 is recessed downstream. The first transport units 61A and 62A hold a pedestal 2 described later from above. The 2nd conveyance parts 61B and 62B push the base 2 to the upstream or downstream.

  The motor 222 (see FIG. 15) rotates the pulleys 52B and 53B. When the motor 222 rotates the pulleys 52B and 53B in the counterclockwise direction when viewed from the right side, the belts 511 and 512 rotate in the counterclockwise direction. Accordingly, the transport unit 60 transports the base 2 from the upstream side to the downstream side, as will be described later. On the other hand, when the motor 222 rotates the pulleys 52B and 53B in the clockwise direction as viewed from the right side, the belts 511 and 512 rotate in the clockwise direction. Accordingly, the transport unit 60 transports the base 2 from the downstream side to the upstream side, as will be described later. Hereinafter, the rotation direction of the motor 222 and the belts 511 and 512 when the pedestal 2 is conveyed from the upstream side to the downstream side is referred to as “forward direction”, and the rotation direction opposite to the forward direction is referred to as “reverse direction”. The belts 511 and 512, the conveyance unit 60, and the motor 222 are collectively referred to as “conveyance mechanism 50”. In addition, the description of the rotation direction (clockwise or counterclockwise) in the following shall show the direction when the packaging apparatus 1 is seen from the right side, unless there is particular limitation.

<Mounting members 141 and 142>
As shown in FIG. 4, a mounting member 141 is provided on the left side surface of the upper end portion of the side plate member 111, and a mounting member 142 is provided on the right side surface of the upper end portion of the side plate member 112. The shapes of the mounting members 141 and 142 are bilaterally symmetric. The mounting member 141 includes a plate-shaped member 141 </ b> A that is separated to the left with respect to the side plate member 111. A concave portion 141D that is recessed downward is provided at the upper end of the plate-shaped member 141A. The mounting member 142 includes a plate-like portion 142 </ b> A that is separated from the side plate member 112 on the right side. A concave portion 142D that is recessed downward is provided at the upper end of the plate-like portion 142A. A construction plate 117 </ b> A is constructed between the side plate members 111 and 112. The shape of the erection plate 117A is a plate shape. The erection plate 117A extends horizontally. The construction plate 117 </ b> A is connected to the side plate member 111 below the mounting member 141, and is connected to the side plate member 112 below the mounting member 142. A film roll 22 (see FIG. 5 and the like) described later is detachably mounted on the upper side of the construction plate 117A.

  The erection plate 117B is provided upstream of the upstream end of the erection plate 117A. The erection plate 117 </ b> B is erected between the side plate members 111 and 112. The construction plate 117C extends upward from the downstream end of the construction plate 117A. The strip-shaped film 24 fed out from the film roll 22 mounted on the mounting members 141 and 142 passes through the gap between the upstream end of the mounting plate 117A and the mounting plate 117B, and the housing 800 (see FIG. 1). It is discharged downward to the interior space. The pedestal 2 on which the article 3 is placed is packaged by the film 24 when the interior space of the housing 800 is conveyed from the upstream side toward the downstream side.

  FIG. 5 shows the film roll 22 mounted on the mounting members 141 and 142. A connection gear 651 is disposed on the downstream side of the recess 141D. Connection gear 651 includes a plurality of gears that mesh with each other. A plate-like member 16 </ b> A is provided on the right side of the connection gear 651. The connection gear 651 is rotatably supported between the plate-like members 141A and 16A.

  A connection gear 652 is disposed below the connection gear 651. Connection gear 652 includes a plurality of gears that mesh with each other. A plate-like member 16B is provided on the right side of the connection gear 652. The connection gear 652 is rotatably supported by the plate-like member 141A. A plunger (not shown) of a solenoid 16C (see FIG. 15) is connected to the plate member 16B. The connecting gear 652 can be moved between a winding position and a feeding position by a solenoid 16C.

  A first pulley (not shown) is provided on the upstream side of the connection gear 652, and a second pulley (not shown) is provided on the further upstream side of the first pulley. A transmission belt 653 is bridged between the first pulley and the second pulley. The first and second pulleys and the transmission belt 653 rotate in conjunction with each other. Rollers 654A and 654B (see FIG. 4) are provided on the upstream side of the film roll 22 mounted on the mounting members 141 and 142. The lengths of the rollers 654A and 654B in the left-right direction are substantially the same as the width of the film 24. Roller 654B connects to the second pulley. The roller 654A is provided on the upstream side of the roller 654B, and contacts the roller 654B from the upstream side. In the present embodiment, the rollers 654A and 654B are provided independently of the winding shaft 23. Accordingly, the rollers 654A and 654B do not rotate in conjunction with the winding shaft 23 unless the film 24 is interposed.

  As shown in FIG. 4, the motor 227 is provided on the left side of the plate-like member 141A of the mounting member 141 and on the upstream side of the installation plate 117C. The rotation shaft of the motor 227 extends horizontally to the right and is inserted into a hole provided in the plate-shaped member 141A. As shown in FIG. 5, a motor gear 670 is fixed to the right end of the rotating shaft. Motor gear 670 meshes with connection gear 652.

  When the connection gear 652 is moved to the winding position by the solenoid 16C, the connection gear 652 is connected to the connection gear 651. In this case, the rotational driving force of the motor 227 is transmitted to the connection gear 651 via the motor gear 670 and the connection gear 652. On the other hand, when the connection gear 652 is moved to the extended position by the solenoid 16C, the connection gear 652 is connected to the first pulley. In this case, the rotational driving force of the motor 227 is transmitted to the roller 654B via the motor gear 670, the connection gear 652, the first pulley, the transmission belt 653, and the second pulley.

<Encoder 40>
As shown in FIG. 5, an encoder 40 is provided on the right side of the plate-like member 16A. The encoder 40 is a known incremental type rotary encoder. The encoder 40 includes a rotatable disk 41 and an optical sensor 42. The axis of the disk 41 is coaxial with the axis of the connection gear 651. As a result, the disk 41 rotates together with the connecting gear 651. The disc 41 has a plurality of through-holes 41A provided at equal intervals in a radial pattern. The sensor 42 emits light toward the disk 41. When the irradiated light hits a portion different from the through hole 41A of the disk 41, the sensor 42 detects the reflected light. On the other hand, when the irradiated light passes through the through hole 41A of the disk 41, the sensor 42 does not detect the reflected light. The sensor 42 outputs a number of pulse signals corresponding to the rotation of the connection gear 651 based on the presence or absence of reflected light. In this way, the encoder 40 detects the rotation of the winding shaft 23 via the connecting gear 651 and the film gear 23B.

<Film roll 22>
The film roll 22 has a film 24 and a winding shaft 23. The film 24 has a strip shape and is wound around the winding shaft 23. The winding shaft 23 is a substantially cylindrical body and extends in the left-right direction. The length of the winding shaft 23 in the left-right direction is substantially equal to the length of the film 24 in the left-right direction. The winding shaft 23 includes a right convex portion 23A that protrudes rightward from the right side surface. In a state in which the film roll 22 is mounted on the mounting members 141 and 142, the right convex portion 23A contacts the concave portion 141D of the mounting member 141. Although not illustrated, the winding shaft 23 includes a left convex portion having the same shape as the right convex portion 23A on the left side surface. The left convex portion is in contact with the concave portion 142D (see FIG. 4) of the mounting member 142 in a state where the film roll 22 is mounted on the mounting members 141 and 142. The winding shaft 23 is rotatably supported by the mounting members 141 and 142. A film gear 23B is provided on the right side surface of the right convex portion 23A. 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.

  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 mounting members 141 and 142. With the connecting gear 652 moved to the winding position, the rotational driving force of the motor 227 (see FIG. 4) is transmitted to the film gear 23B via the motor gear 670 and the connecting gears 651 and 652. In response to the rotation of the motor 227, the film gear 23B rotates counterclockwise. When the film gear 23 </ b> B rotates counterclockwise, the film 24 is wound around the film roll 22 by rotating the winding shaft 23.

  On the other hand, the rotational driving force of the motor 227 is transmitted to the roller 654B in a state where the connecting gear 652 is moved to the extended position. In accordance with the rotation of the motor 227, the roller 654B rotates clockwise. When the roller 654B rotates clockwise, the roller 654B unwinds the film 24 sandwiched between the roller 654A from the film roll 22.

<Pressing mechanism 39>
As shown in FIG. 2, a carriage 349 that is driven by the rotation of the motor 221 is provided on the right side surface of the side plate member 111. The carriage 349 is connected to a support member 341 (see FIG. 6). A carriage 350 is provided on the left side surface of the side plate member 112. The carriage 350 is connected to the support member 342.

  As shown in FIGS. 6 to 8, 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 length in the left-right direction of the support members 341, 342 is slightly shorter than the length in the left-right direction of the cradle 12, 13 (see FIG. 2). Hereinafter, the support member 341 will be described, and the description of the support member 342 will be omitted. The support member 341 includes a base portion 341A, a first extension portion 341B, a second extension portion 341C, and a third extension portion 341D. The base portion 341A, the first extending portion 341B, the second extending portion 341C, and the third extending portion 341D are plate-shaped. The respective planes of the base portion 341A, the first extending portion 341B, the second extending portion 341C, and the third extending portion 341D face the left-right direction.

  The shape of the base portion 341A is substantially rectangular in a side view. Two holes are formed in the base portion 341A so as to be aligned in the vertical direction in the upstream portion. The first extending portion 341B extends horizontally from the lower portion of the downstream end of the base portion 341A toward the downstream side. The shape of the first extending portion 341B is substantially rectangular in a side view. The upper end and the lower end of the first extending portion 341B extend horizontally toward the downstream side. An extending portion 3415 extending downward is provided at the downstream end of the first extending portion 341B. A recessed portion 3412 that is recessed upward is provided in a portion of the lower end of the first extending portion 341B on the upstream side of the extending portion 3415. The second extending portion 341C extends horizontally from the upper portion of the downstream end of the base portion 341A toward the downstream side. The shape of the second extending portion 341C is substantially rectangular in a side view. The downstream end portion of the second extending portion 341C is disposed on the downstream side of the downstream end portion of the first extending portion 341B. The upper end and the lower end of the second extending portion 341C extend horizontally toward the downstream side. The upper end of the first extending portion 341B and the lower end of the second extending portion 341C are spaced apart in the vertical direction to form a gap 3414 extending in the transport direction. The gap 3414 extends with the same width from the base portion 341A toward the downstream side. The third extending portion 341D extends vertically upward from a portion on the upstream side of the upper end of the base portion 341A. The shape of the third extending portion 341D is substantially rectangular in a side view. The third extending portion 341D has three holes arranged in the vertical direction. Note that screws for connecting the support member 341 to the carriage 349 (see FIG. 2) are inserted through the plurality of holes of the base portion 341A and the third extending portion 341D.

  As shown in FIGS. 6 and 7, the base portion 342A, the first extending portion 342B, the second extending portion 342C, and the third extending portion 342D of the support member 342 are respectively the base portion 341A of the support member 341, This corresponds to the first extending portion 341B, the second extending portion 341C, and the third extending portion 341D. The recess 3422 (see FIG. 7) and the extension 3425 (see FIG. 7) of the first extension 342B correspond to the recess 3412 and the extension 3415 of the first extension 341B, respectively. A gap 3424 between the first extending part 342B and the second extending part 342C corresponds to a gap 3414 between the first extending part 341B and the second extending part 341C. Screws for connecting the support member 342 to the carriage 350 (see FIG. 2) are inserted through the plurality of holes of the base portion 342A and the third extending portion 342D. Hereinafter, the support members 341 and 342 are collectively referred to as “a pair of support members 34”. The bases 341A and 342A are collectively referred to as “a pair of bases 34A”. The first extending portions 341B and 342B are collectively referred to as “a pair of first extending portions 34B”. The second extending portions 341C and 342C are collectively referred to as “a pair of second extending portions 34C”.

  The pressing rollers 30, 31, and 32 are disposed between the downstream portions of the pair of first extending portions 34B. The right ends of the pressing rollers 30 to 32 are supported by the first extending portion 341B. The left ends of the pressing rollers 30 to 32 are supported by the first extending portion 342B. The pressing roller 33 is disposed between the pair of base portions 34A. The right end of the pressing roller 33 is supported by the base 341A. The left end of the pressing roller 33 is supported by the base 342A. The erection member 35 is disposed in the upstream portion of the pair of second extending portions 34C. The left end of the erection member 35 is supported by the second extending portion 341C. The left end of the erection member 35 is supported by the second extending portion 342C.

  As shown in FIG. 7, the pressing roller 30 includes divided rollers 301, 302, 303, 304, 305, 306, 307, 308, and a shaft member 30C. Each of the divided rollers 301 to 308 is a gear extending in the left-right direction. The lengths of the divided rollers 301 to 308 in the left-right direction are substantially the same, and are approximately 1/8 of the length between the pair of first extending portions 34B (see FIG. 7). The division rollers 301 to 308 are arranged in the left-right direction. As shown in FIG. 8, a plurality of convex portions 30 </ b> A projecting outward are provided on the peripheral side surfaces of the divided rollers 301 to 308. Each of the plurality of convex portions 30A forms a plurality of concave portions 30B between each of the other adjacent plurality of convex portions 30A. The plurality of convex portions 30A and the plurality of concave portions 30B extend in the left-right direction. Hereinafter, as shown in FIGS. 7 and 8, a virtual line extending in the left-right direction along the rotation center of the pressing roller 30 is referred to as a central axis 301 </ b> C.

  Each of the divided rollers 301 to 308 has a hole that penetrates along the central axis 301C. The shaft member 30C penetrates the hole and extends in the left-right direction along the central axis 301C. The right end of the shaft member 30C is fitted into a hole provided in a portion upstream of the extending portion 3415 of the first extending portion 341B and downstream of the recessed portion 3412. Although not shown, the left end of the shaft member 30C is fitted into a hole provided in a portion on the upstream side of the extending portion 3425 of the first extending portion 342B and on the downstream side of the recessed portion 3422. The split rollers 301 to 308 are connected to each other with play.

  As shown in FIGS. 6 and 7, the pressing roller 31 includes divided rollers 311, 312, 313, and 314 and a shaft member 31 </ b> C. Each of the divided rollers 311 to 314 is a cylindrical body extending in the left-right direction. The division rollers 311 to 314 are arranged in the left-right direction. Each of the divided rollers 311 to 314 has a hole that penetrates along the axis. The shaft member 31C extends in the left-right direction through the hole. The right end of the shaft member 31C is fitted into a hole provided in the upper portion of the recess 3412 of the first extending portion 341B. The left end of the shaft member 31C is fitted into a hole provided in the upper portion of the concave portion 3422 of the first extending portion 342B. Each of the divided rollers 311 to 314 can rotate independently of the shaft member 31C.

  The pressing roller 32 includes a roller 32A and a shaft member 32C. The roller 32A is a cylindrical body that extends in the left-right direction. The roller 32A has a hole that penetrates along the axis. The shaft member 32C extends in the left-right direction through the hole. The right end of the shaft member 32C is fitted into a hole provided in a portion on the upstream side of the concave portion 3412 of the first extending portion 341B. The left end of the shaft member 32C is fitted into a hole provided in a portion on the upstream side of the concave portion 3422 of the first extending portion 342B. The roller 32A is rotatable with respect to the shaft member 32C.

  The pressing roller 33 includes divided rollers 331, 332, 333, 334, and a shaft member 33C. Each of the dividing rollers 331 to 334 is a cylindrical body extending in the left-right direction. The division rollers 331 to 334 are arranged in the left-right direction. Each of the dividing rollers 331 to 334 has a hole that penetrates along the axis. The shaft member 33C extends in the left-right direction through the hole. The right end of the shaft member 33C is fitted into a hole provided in the base portion 341A. The left end of the shaft member 33C is fitted into a hole provided in the base portion 342A. Each of the split rollers 331 to 334 can rotate independently with respect to the shaft member 33C.

  The erection member 35 extends between the upstream end portion of the second extending portion 341C and the upstream end portion of the second extending portion 342C. As shown in FIGS. 6 and 8, the erection member 35 includes plate-like members 35 </ b> A and 35 </ b> B and a bending member 35 </ b> C. The plate-like members 35A and 35B are spaced apart from each other in the vertical direction. The bending member 35C is provided between the downstream end portions of the two plate-like members 35A and 35B. The bending member 35C is curved in a convex shape on the downstream side.

  As shown in FIG. 8, the pressing rollers 30 and 32 are arranged horizontally. The lower ends of the pressing rollers 30 and 32 slightly protrude downward from the lower end of the first extending portion 341B. The pressing roller 31 is disposed above the pressing rollers 30 and 32. The upper end of the pressing roller 31 slightly protrudes above the upper end of the first extending portion 341B. The pressing roller 33 is disposed above the pressing roller 31. Hereinafter, the pair of support members 34, the pressing rollers 30 to 33, and the erection member 35 are referred to as a “pressing mechanism 39”.

  As shown in FIG. 2, the motor 221 can move the pressing mechanism 39 in the vertical direction via carriages 349 and 350. FIG. 19 shows a state in which the pressing mechanism 39 is disposed at the top. In this state, of the support members 342 of the pair of support members 34, the third extending portion 342 </ b> D is disposed in the vicinity of the upstream side and the lower side of the film roll 22. The first extending portion 342 </ b> B and the second extending portion 342 </ b> C are disposed below the film roll 22. The pressing rollers 30 to 33 and the erection member 35 are disposed below the film roll 22. FIG. 23 shows a state in which the pressing mechanism 39 is disposed at the lowest position. In this state, the first extending portion 342 </ b> B of the support members 342 of the pair of support members 34 is disposed below the transport path 103. The pressing rollers 30 to 32 supported by the pair of first extending portions 34 </ b> B are disposed below the conveyance path 103. The second extending portion 342C is disposed on the upper side of the first extending portion 342B with the conveyance path 103 interposed therebetween. The pressing roller 33 and the erection member 35 are disposed above the conveyance path 103. The gap 3424 (see FIGS. 6 and 7) is arranged along the transport 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”. The movement path 104 is orthogonal to the transport path 103 and extends along the vertical direction. A position where the conveyance path 103 and the movement path 104 intersect is referred to as an “intersection position 105”.

<Base guide member 71, holding member 72>
As shown in FIGS. 9 and 10, a pedestal guide member 71 is provided on the upstream side of the portion sandwiched between the side plate members 111 and 112 (see FIG. 2) and on the lower side of the conveyance path 103 (see FIG. 19). The pedestal guide member 71 has a flat surface portion 71A that is in contact with the transport path 103 from below. The flat surface portion 71 </ b> A supports the pedestal 2 transported from the upstream side to the downstream side along the transport path 103 from below between the cradles 12 and 13, and guides the cradle 12 from the cradle 12 to the cradle 13. A plurality of concavo-convex portions (see FIG. 12) extending downstream are provided at the upper end portion on the downstream side of the pedestal guide member 71. The plurality of uneven portions extend in the left-right direction. Hereinafter, of the pedestal guide member 71, the downstream upper end portion provided with a plurality of convex portions is referred to as a “holding portion 71B”. The pedestal guide member 71 has a support portion 70 below the flat portion 71A. The support part 70 is box-shaped. The support part 70 supports the flat part 71A from below.

  As shown in FIG. 10, a pair of support members 78 are provided outside the left and right side surfaces of the support portion 70. The pair of support members 78 can rotate with a projecting portion 70 </ b> D projecting from the left and right side surfaces of the support portion 70 of the base guide member 71 to the left and right sides as a fulcrum. A holding member 72 is provided on the opposite side of the pair of support members 78 from the side supported by the protrusion 70D. The shape of the holding member 72 is a substantially quadrangular prism extending in the left-right direction. The left and right end portions of the holding member 72 are supported by a pair of support members 78. The holding member 72 has a plurality of uneven portions. The plurality of uneven portions extend in the left-right direction.

  The pair of support members 78 are rotated by a motor 226 (see FIG. 15). With the rotation of the pair of support members 78, the holding member 72 moves below the conveyance path 103 and is close to the holding portion 71 </ b> B of the pedestal guide member 71 (see FIGS. 9 and 10), and the pedestal guide member 71. It switches to the state (refer FIG. 12, FIG. 13) spaced apart from the holding | maintenance part 71B below. When the holding member 72 comes close to the holding portion 71B of the pedestal guide member 71, the uneven portion of the holding member 72 and the uneven portion of the holding portion 71B are fitted. At this time, the film 24 supplied from the film roll 22 is sandwiched between the plurality of projections and recesses, and is held below the conveyance path 103.

  Hereinafter, the position of the pair of support members 78 (see FIGS. 9 and 10) when the holding member 72 approaches the holding portion 71B of the pedestal guide member 71 is referred to as “proximity position”. The position of the pair of support members 78 (see FIGS. 12 and 13) when the holding member 72 is separated from the holding portion 71B of the base guide member 71 is referred to as a “separated position”.

<Heating mechanism 86>
As shown in FIG. 10, a heating mechanism 86 is provided on the downstream side of the support portion 70 of the pedestal guide member 71. The heating mechanism 86 includes five heating units 861, a heater 861A, a support member 862, and a relay 861B (see FIG. 15). The five heating units 861 have a substantially rectangular parallelepiped shape. The five heating units 861 have heaters 861A (see FIG. 15) on the upper surface. The heater 861A is a resistance heating type heater that heats by passing an electric current. The relay 861B heats the heater 861A by controlling energization to the heater 861A. The support member 862 supports the five heating units 861 from below. The support member 862 has a rack gear 862A at the right end of the downstream side surface. The rack gear 862A extends in the vertical direction with the teeth facing downstream. A motor 223 (see FIG. 15) is provided on the downstream side of the support member 862. A pinion gear connected to the rotation shaft of the motor 223 meshes with the rack gear 862A. As the motor 223 rotates, the support member 862 moves up and down. As a result, the five heating units 861 also move in the vertical direction. When the five heating units 861 are arranged at the lowest position, the heaters 861A on the respective upper surfaces are separated downward from the transport path 103 (see FIG. 19). On the other hand, when the five heating units 861 are arranged at the uppermost position, the heaters 861 </ b> A on the respective upper surfaces are arranged slightly above the conveyance path 103.

  The lid member 87 is provided on the downstream side of the support portion 70 of the pedestal guide member 71. The lid member 87 is a substantially rectangular plate member. The longitudinal direction of the lid member 87 extends in the left-right direction. The lid member 87 is rotatably supported on the downstream side surface of the support portion 70. The flat surface of the lid member 87 extends substantially horizontally with the five heating units 861 disposed at the lowest position. The lid member 87 covers the upper heater 861A of each of the five heating units 861 from above. On the other hand, the five heating units 861 come into contact with the lid member 87 from below in the process of moving from the lowest level toward the highest level. The five heating units 861 push up the lid member 87 upward. The lid member 87 rotates. In a state where the five heating units 861 are arranged at the uppermost position, the lid member 87 does not cover the upper heater 861A of each of the five heating units 861 from above.

  Note that a device that controls energization of the heater 861A is not limited to the relay 861B. For example, a transistor that controls energization of the heater 861A may be provided instead of the relay 861B.

<Rotation suppression mechanism 80>
The rotation suppression mechanism 80 is provided on the downstream side of the heating mechanism 86. As shown in FIG. 11, the rotation suppression mechanism 80 includes a grip roller 81, a shaft member 81 </ b> C, 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 conveyance path 103 (see FIG. 19). 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. 7) of the pressing mechanism 39. On the peripheral side surface of the grip roller 81, a plurality of convex portions 81A projecting outward are provided. Each of the plurality of convex portions 81A forms a plurality of concave portions 81B between each of the other adjacent plurality of convex portions 81A. The plurality of convex portions 81A and the plurality of concave portions 81B extend in the left-right direction. Hereinafter, an imaginary line extending in the left-right direction along the rotation center of the grip roller 81 is referred to as a center axis 811C.

  The grip roller 81 has a hole that penetrates along the central axis 811C. The shaft member 81C passes through the hole and extends in the left-right direction along the central axis 811C. The length of the shaft member 81 </ b> C in the left-right direction is longer than the length of the grip roller 81 in the left-right direction. The grip roller 81 is fixed in a left-right position with respect to the shaft member 81C by collars 81D arranged at both left and right ends. The shaft member 81C is D-cut across the entire left and right. Both left and right end portions of the shaft member 81C are rotatably supported by the plate member 83. The grip roller 81 rotates in conjunction with the shaft member 81C when the shaft member 81C rotates.

  The electromagnetic brake 82 is provided on the right side of the right end of the shaft member 81C. The electromagnetic brake 82 is a well-known electromagnetic brake capable of controlling the rotation of the shaft member 81C by an electromagnetic force. The shaft member 81C is connected to the shaft member 81C via a connection gear 821. The electromagnetic brake 82 regulates the rotation of the shaft member 81C 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 81C in a state where the energization is stopped. In this case, the grip roller 81 can rotate.

  12 to 14 show a state when the pressing mechanism 39 moves to the lowest position. As illustrated in FIGS. 12 and 13, the shaft member 81 </ b> C is disposed below the first extending portion 341 </ b> B of the support member 341 disposed in the lowest position. As shown in FIG. 12, the extended portion 3415 of the first extended portion 341B of the support member 341 and the extended portion 3425 of the first extended portion 341B of the support member 342 are arranged on the downstream side of the shaft member 81C. Is done. The lower end of the first extending portion 341 </ b> B and the upstream end portion of the extending portion 3415 are in contact with the collar 81 </ b> D on the right side of the grip roller 81. Although not shown, the lower end of the first extending portion 342B and the upstream end of the extending portion 3425 are in contact with the collar 81D on the left side of the grip roller 81.

  As shown in FIGS. 13 and 14, the grip roller 81 is disposed obliquely downward on the downstream side with respect to the pressing roller 30 of the pressing mechanism 39 in the state of being disposed at the lowest position. Details are as follows. As illustrated in FIG. 14, a virtual plane P <b> 1 including a central axis 301 </ b> C of the pressing roller 30 and a central axis 811 </ b> C of the grip roller 81 is defined. A virtual plane P2 that includes the center axis 301C of the pressing roller 30 and extends along the movement path 104 (see FIG. 19) is defined. A virtual plane P3 including the central axis 301C of the pressing roller 30 and extending horizontally is defined. In this case, the virtual plane P1 intersects with both the virtual planes P2 and P3. The acute angle formed by the virtual planes P1 and P2 is 26 degrees. The acute angle formed by the virtual planes P1 and P2 is not limited to 26 degrees, and may be other angles.

  The grip roller 81 is close to the pressing roller 30 of the pressing mechanism 39 arranged at the lowest position. The plurality of convex portions 81 </ b> A of the grip roller 81 are fitted with the plurality of concave portions 30 </ b> B of the pressing roller 30. For example, in this state, when the rotation of the grip roller 81 is restricted by the electromagnetic brake 82 (see FIG. 11), the rotation of the pressing roller 30 is also restricted.

<Cutting part 77>
As shown in FIGS. 9 and 10, a guide rail 74 extending in the left-right direction is provided on the upstream side of the grip roller 81 and on the lower side of the conveyance path 103. The cutting part 77 has a hole penetrating in the left-right direction. As shown in FIG. 10, the cutting portion 77 is movable in the left-right direction along the guide rail 74. A motor 225 is provided on the left side of the left end of the guide rail 74. The motor 225 is connected to the cutting part 77 via a connecting gear 772 and a belt (not shown). The motor 225 can move the cutting portion 77 in the left-right direction along the guide rail 74.

  As shown in FIGS. 13 and 14, the cutting portion 77 includes a blade portion 771 that protrudes upward and extends in the left-right direction. When the pressing mechanism 39 is disposed at the lowest position, the blade portion 771 of the cutting unit 77 is disposed between the pressing rollers 30 and 32 and below the pressing roller 31. Further, the blade portion 771 is disposed inside the concave portion 3412 of the first extending portion 341B as viewed from the side. For this reason, when the cutting part 77 moves in the left-right direction, the blade part 771 does not contact the first extending part 341B.

<Film moving mechanism 25>
As shown in FIG. 10, the film moving mechanism 25 includes holding members 261 and 262 and a moving member 27. The shapes of the holding members 261 and 262 are symmetrical. Hereinafter, the holding member 261 will be described, and the description of the holding member 262 will be omitted. The shape of the holding member 261 is an elongated plate. The plane of the holding member 261 faces in the left-right direction. The holding member 261 has a first portion 261A and a second portion 261B. The first portion 261A extends linearly. The second portion 261B extends from the one end portion of the first portion 261A so as to be curved in a substantially arc shape. Of the first portion 261A, the end opposite to the end connected to the second portion 261B is rotatably supported by the support plate 29 below the rotation suppression mechanism 80. The motor 224 fixed to the support plate 29 is connected to the end portion of the first portion 261A of the holding member 261 opposite to the end portion to which the second portion 261B is connected via the connecting gear 28. The connection gear 28 can rotate the holding member 261 by transmitting the rotational driving force of the motor 224 to the holding member 261.

  The holding member 262 has a first portion 262A and a second portion 262B. The first portion 262A and the second portion 262B correspond to the first portion 261A and the second portion 261B of the holding member 261, respectively. Of the first portion 262A, the end opposite to the end connected to the second portion 262B is rotatably supported by a support plate below the rotation suppression mechanism 80. The holding members 261 and 262 are separated in the left-right direction by substantially the same length as the length of the grip roller 81 in the left-right direction. The moving member 27 is disposed between an end of the second portion 261B opposite to the side to which the first portion 261A is connected and an end of the second portion 262B opposite to the side to which the first portion 262A is connected. Is built. The moving member 27 has an elongated rod shape. Hereinafter, the holding members 261 and 262 are collectively referred to as “holding member 26”.

  9 and 10 show a state in which the holding member 26 is rotated clockwise according to the rotation of the motor 224. In this state, the first portions 261 </ b> A and 262 </ b> A of the holding member 26 extend from the lower side of the grip roller 81 to the downstream side of the grip roller 81 in the diagonally upward direction on the downstream side. The second portions 261B and 262B extend upstream from the upper ends of the first portions 261A and 262A through the grip roller 81, the guide rail 74, and the upper side of the heating mechanism 86. The moving member 27 is disposed below the holding portion 71 </ b> B of the pedestal guide member 71. Hereinafter, the position of the film moving mechanism 25 in FIGS. 9 and 10 is referred to as “position before retraction”.

  12 and 13 show a state in which the holding member 26 rotates counterclockwise according to the rotation of the motor 224. In this state, the first portions 261 </ b> A and 262 </ b> A of the holding member 26 extend obliquely downward on the downstream side from below the grip roller 81. The second portions 261B and 262B extend upward from the lower ends of the first portions 261A and 262A. The moving member 27 is disposed downstream and below the grip roller 81. Hereinafter, the position of the film moving mechanism 25 in FIGS. 12 and 13 is referred to as a “post-retraction position”. The moving member 27 is disposed below the conveyance path 103 in the process in which the film moving mechanism 25 moves from the pre-retraction position (see FIGS. 9 and 10) to the post-retraction position (see FIGS. 12 and 13). To temporarily move upward in the conveyance path 103. Thereafter, the moving member 27 moves again to the lower side of the conveyance path 103.

<Sensor 205>
The sensor 205 (see FIG. 15) is provided in the internal space of the cradle 13. The sensor 205 is a non-contact sensor (reflective sensor) provided below the belt 512. The sensor 205 can detect a reflector provided on the belt 512.

<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 between the bent portions 911 and 912 of the plate-like portion 90 is referred to as a “first plate-like portion 905”. 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 the bent portions 911 and 912. The plurality of holes 927 formed in the bent portion 911 are aligned in the left-right direction with any of the plurality of holes 927 formed in the bent portion 912, respectively.

  The conveyance part 60 can be attached to each of the plurality of holes 927. Specifically, as shown in FIG. 1, when the operator places the pedestal 2 on the receiving base 12, each of the plurality of holes 927 has a pair of holes 927 on the downstream side in the transport direction, and the transport unit 60. Install. 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 memory 202, a RAM 203, a sensor 205, a sensor 58, an operation unit 206, a display unit 207, an electromagnetic brake 82, a relay 861B, a heater 861A, and a solenoid 16C. The CPU 201 controls the entire packaging device 1. The CPU 201 executes a program stored in the flash memory 202 to execute a process of packaging the article 3 placed on the pedestal 2 with the film 24. The flash memory 202 stores programs and the like for various processes to be described later executed by the CPU 201. Relay 861B is electrically connected to heater 861A.

  The packaging device 1 includes drive units 211 to 217, motors 221 to 227, an encoder 232, and an encoder 40. The drive units 211 to 217 drive the motors 221 to 227 by outputting pulse signals to the motors 221 to 227, respectively. The motors 221 to 227 are DC motors. The encoder 232 outputs a number of pulse signals corresponding to the rotation of the motor 222. The encoder 40 outputs a number of pulse signals corresponding to the rotation of the winding shaft 23. The CPU 201 includes a flash memory 202, a RAM 203, a sensor 205, a sensor 58, an operation unit 206, a display unit 207, an electromagnetic brake 82, a relay 861B, a solenoid 16C, a heater 861A, driving units 211 to 217, an encoder 232, and an encoder 40. Connect electrically. Drive units 211 to 217 are electrically connected to motors 221 to 227, respectively.

<Packaging processing, monitoring processing>
A packaging process (see FIGS. 16 and 17) and a monitoring process (see FIG. 18) executed by the CPU 201 of the packaging apparatus 1 will be described with reference to FIGS. It is assumed that the film roll 22 (see FIG. 5) is attached to the attachment members 141 and 142 (see FIG. 4) before the packaging device 1 is turned on. When the packaging apparatus 1 is powered on, the CPU 201 starts the packaging process by reading and executing the program stored in the flash memory 202. 19 to 27 show sectional views taken along the line AA in FIG.

  As shown in FIG. 16, the CPU 201 initializes the state of the packaging device 1 (S11). Specifically, it is as follows. The CPU 201 drives the motor 221 by controlling the drive unit 211 and raises the push-down mechanism 39 to be arranged at the top. The pressing rollers 30 to 33 supported by the pair of support members 34 are arranged at the uppermost position (see FIG. 19). The CPU 201 drives the motor 222 by controlling the drive unit 212 to rotate the belts 511 and 512 (see FIG. 19) of the transport mechanism 50. When the sensor 205 (see FIG. 15) detects the reflecting plate, the CPU 201 controls the driving unit 212 to stop driving the motor 222. As a result, the transport unit 60 protrudes upward from the receiving surface 12A (see FIG. 3) of the cradle 12 (see FIG. 19). The packaging device 1 is in a state in which the user can set the pedestal 2 on the receiving surface 12A of the cradle 12. The CPU 201 controls the driving unit 213 to drive the motor 223, and lowers the five heating units 861 and arranges them at the lowest position. Each heater 861A of the five heating units 861 is separated downward from the conveyance path 103 (see FIG. 19). The CPU 201 controls the driving unit 214 to drive the motor 224 and rotate the film moving mechanism 25 clockwise. As a result, the film moving mechanism 25 is disposed at the position before retraction (see FIG. 19). The CPU 201 controls the driving unit 215 to drive the motor 225 and move the cutting unit 77 to the left side. The CPU 201 controls the drive unit 216 to drive the motor 226 to move the pair of support members 78 to the separation position. The holding member 72 is in a state of being separated downward with respect to the holding portion 71B of the pedestal guide member 71. The CPU 201 stops energization of the electromagnetic brake 82. As a result, the grip roller 81 can be freely rotated. CPU201 controls relay 861B and stops energization to heater 861A.

  The user pulls the film 24 downward 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 pulls the film 24 further downward and places it on the upstream side of the pressing roller 33. The user further pulls out the film 24 and arranges the leading end of the film 24 below the conveyance path 103 (see FIG. 19) and downstream of the holding portion 71B of the pedestal guide member 71 (see FIG. 19). The user places the pedestal 2 on the cradle 12 (see FIG. 19). The pedestal 2 is positioned by the transport unit 60. The side 901 of the first plate-like portion 905 of the base 2 is disposed on the downstream side, and the side 902 is disposed on the upstream side. The article 3 is placed on the first plate-like portion 905 of the base 2 (see FIG. 19).

  The user performs an input operation for notifying the packaging apparatus 1 that preparation has been completed via the operation unit 206. The CPU 201 controls the driving unit 216 to drive the motor 226 to move the pair of support members 78 to the close positions. The holding member 72 is close to the downstream side of the holding portion 71B of the base guide member 71 (see FIG. 19). The leading end of the film 24 drawn out from the film roll 22 is sandwiched between the holding direction 71B and the holding member 72 of the base guide member 71 from both sides in the transport direction. Hereinafter, a portion of the film 24 in the vicinity of the tip including the position sandwiched between the holding portion 71B and the holding member 72 of the base guide member 71 is referred to as “tip portion 24A” (see FIG. 28A). The film 24 and the transport path 103 intersect at the leading end portion 24 </ b> A of the film 24. The film 24 extends in the vertical direction between the upstream side of the pressing roller 33 and a portion sandwiched between the holding portion 71 </ b> B and the holding member 72 of the pedestal guide member 71.

  The CPU 201 displays on the display unit 207 a screen for inputting the film remaining amount that is the amount of the film 24 wound around the winding shaft 23. The user performs an input operation of the remaining film amount of the used film roll 22 via the operation unit 206. In the present embodiment, the user inputs the diameter of the film roll 22 (hereinafter referred to as “roll diameter”) indicating the remaining film amount. When the CPU 201 detects an input operation of the roll diameter (film remaining amount) via the operation unit 206, the CPU 201 acquires the input roll diameter (S12). The CPU 201 stores the acquired roll diameter in the RAM 203.

  The CPU 201 determines whether an instruction to start the packaging operation has been input (S13). When the packaging operation start instruction is not input (S13: NO), the CPU 201 repeats the process of S13 until the packaging operation start instruction is input. When the user inputs a packaging operation start instruction via the operation unit 206, the CPU 201 determines that a packaging start instruction has been input (S13: YES). The CPU 201 drives the solenoid 16C to move the connecting gear 652 (see FIG. 5) to the extended position (S14). Thereby, the packaging device 1 is in a state where the rotational driving force of the motor 227 can be transmitted to the roller 654B. The CPU 201 starts the monitoring process by reading and executing the program stored in the flash memory 202 (S21). The CPU 201 executes the monitoring process in parallel with the packaging process.

  The monitoring process will be described with reference to FIG. The monitoring process is a process for monitoring the rotation amount of the winding shaft 23. The amount of rotation is a vector amount. When the amount of rotation is represented by a positive number, the amount of rotation is represented by a negative number. The monitoring process is executed in parallel with the packaging process while the connecting gear 652 is in the extended position and the motor 227 is driven in the packaging operation by the packaging device 1. That is, in the monitoring process, the rotation amount of the winding shaft 23 is monitored when the film 24 is being fed from the film roll 22.

  When the monitoring process is started, the CPU 201 executes an initialization process (S100). In the initialization process, the value stored in the RAM 203 in S101 described later is cleared. The CPU 201 acquires the amount of rotation of the winding shaft 23 within a predetermined time (for example, 0.6 seconds) based on the pulse signal output by the encoder 40 (S101). The CPU 201 stores a value obtained by accumulating the acquired value of the rotation amount of the winding shaft 23 and the acquired rotation amount of the winding shaft 23 in the RAM 203. Hereinafter, the accumulated rotation amount is referred to as “cumulative rotation amount”. The CPU 201 determines whether the winding shaft 23 is rotating based on the stored value of the rotation amount of the winding shaft 23 (S102).

  Here, when the connecting gear 652 is in the extended position and the motor 227 is driven, the rotational driving force of the motor 227 is transmitted to the roller 654B, so that the roller 654B is rotating clockwise. is there. When the film 24 of the film roll 22 is present, since the roller 654B rotates clockwise, the film 24 sandwiched between the roller 654A is fed out from the film roll 22. In this case, when the film 24 is unwound from the film roll 22, the winding shaft 23 rotates. As the winding shaft 23 rotates, the film gear 23B and the connecting gear 651 rotate, and the disk 41 rotates. As a result, the encoder 40 detects the rotation of the winding shaft 23 via the film gear 23B and the connecting gear 651. On the other hand, when the film 24 of the film roll 22 is not present, the winding shaft 23 does not rotate because there is no film 24 fed out from the film roll 22 even though the roller 654B rotates clockwise. In this case, since the connecting gear 651 does not rotate, the encoder 40 does not detect the rotation of the winding shaft 23.

  When the value of the amount of rotation of the winding shaft 23 within the predetermined time is not “0”, the CPU 201 determines that the winding shaft 23 is rotating (S102: YES). In this case, since it is determined that there is the film 24 of the film roll 22, the CPU 201 returns the process to S101 as it is, and repeatedly acquires the rotation amount of the winding shaft 23 within a predetermined time. When the rotation amount of the winding shaft 23 within a certain time is “0”, the CPU 201 determines that the winding shaft 23 is not rotating (S102: NO). In this case, since it is determined that the film 24 of the film roll 22 has run out, the CPU 201 controls the driving units 211 to 217 to stop the driving of the motors 221 to 227, respectively (S103). The CPU 201 notifies the user of an error by sounding an error sound or blinking an error lamp (not shown). CPU201 complete | finishes the packaging process currently performed in parallel (S104). The CPU 201 ends the monitoring process. Therefore, the packaging operation by the packaging apparatus 1 is stopped, and the user can grasp that the film 24 of the film roll 22 being used is gone.

  As shown in FIG. 16, after the monitoring process is started by the process of S21, the CPU 201 controls the drive unit 217 to start driving the motor 227 (S22). The roller 654B rotates according to the rotation of the motor 227. The film 24 is forced out of the film roll 22 by rollers 654A and 654B (see FIG. 5) (see arrow 171 and FIG. 19). For this reason, the film 24 is in a slack state.

  The CPU 201 controls the drive unit 212 to rotate the motor 222 in the forward direction (S23). The belts 511 and 512 rotate in the forward direction (the direction of the arrow 181 in FIG. 19). The transport unit 60 transports the pedestal 2 from the upstream side to the downstream side along the transport path 103. The downstream end (side 901) of the first plate-like portion 905 of the base 2 contacts the film 24 and then passes over the holding member 72 (arrow 182 in FIG. 20). The side 901 of the first plate-like portion 905 of the base 2 pushes the film 24 downstream. The side 901 of the first plate-like portion 905 of the base 2 approaches the movement path 104 from the upstream side and passes above the five heating units 861 (see FIG. 20). The leading end of the film 24 is sandwiched between the holding portion 71 </ b> B and the holding member 72 of the base guide member 71. When the film 24 is pushed downstream by the side 901 of the first plate-like portion 905 of the pedestal 2, the leading end of the film 24 goes around the lower surface of the first plate-like portion 905 of the pedestal 2.

  When the pedestal 2 is transported to the downstream side, the side 901 of the first plate-like portion 905 of the pedestal 2 crosses the intersection position 105 where the transport path 103 and the movement path 104 intersect from the upstream side toward the downstream side. . The pedestal 2 moves further downstream. As shown in FIG. 21, the film 24 extending from the film roll 22 contacts the upstream side of the pressing roller 33 and is slightly guided to the upstream side, bends at the portion in contact with the pressing roller 33 and extends downstream, It reaches the side 901 of 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. The pressing rollers 30 to 32 are placed above the film 24 extending above the base 2 and the article 3.

  As shown in FIG. 16, the CPU 201 starts transporting the pedestal 2 to the downstream side in the process of S <b> 23 and then starts transporting the pedestal 2 in accordance with the pulse signal output from the encoder 232. The rotation amount of the motor 222 is specified. The CPU 201 is downstream by a distance L1 (see FIG. 28A) with respect to the upper position of the five heating units 861 in a state where the side 901 of the first plate-like portion 905 of the pedestal 2 is disposed at the uppermost position. Is determined based on the identified amount of rotation of the motor 222. The distance L1 is slightly shorter than the length L0 between the sides 901 and 902 of the base 2 (see FIG. 28A). When the CPU 201 determines that the side 901 of the first plate-like portion 905 of the pedestal 2 has moved the distance L1 downstream from the upper position of the five heating units 861, the CPU 201 controls the driving unit 212 to control the motor 222. The drive is stopped (S24). The conveyance to the downstream side of the base 2 stops.

  The CPU 201 controls the driving unit 217 to stop driving the motor 227 (S25). The rotation of the roller 654B that has been rotated according to the rotation of the motor 227 stops. The feeding of the film 24 from the film roll 22 by the rollers 654A and 654B (see FIG. 5) stops. The CPU 201 ends the monitoring process (see FIG. 18) started by the process of S21 (S26).

  CPU201 controls actuator 213, drives motor 223, and raises five heating units 861 (S31). After the five heating units 861 are arranged at the uppermost position, the CPU 201 controls the drive unit 213 to stop driving the motor 223 and stop the five heating units 861 from rising. As shown in FIG. 21, when the heating mechanism 86 is raised to the top (arrow 183), the upper side of each of the five heating units 861 is close to the conveyance path 103 from below and slightly above the conveyance path 103. Will be placed in the state. As shown in FIG. 28A, the side 901 of the first plate-like portion 905 of the pedestal 2 has moved a distance L1 downstream from the upper position of the five heating units 861, and the first pedestal 2 The film 24 wraps around the lower surface of the plate-like portion 905. Therefore, with the five heating units 861 arranged at the top, the upper side of the five heating units 861 is in a state where the film 24 is sandwiched between the lower surface of the first plate-like portion 905 of the base 2. Hereinafter, in the case of FIG. 28A, the upper part of the five heating units 861 in the lower surface of the first plate-like portion 905 of the base 2 is referred to as “first base part 2A”. The first pedestal portion 2A faces the five heating units 861 with the film 24 interposed therebetween. A portion of the film 24 that is sandwiched between the first pedestal portion 2A and the five heating units 861 is referred to as a “first film portion 24B”.

  As shown in FIG. 16, the CPU 201 controls the relay 861B, energizes the heater 861A, and heats the heater 861A to the first temperature (S32). The first temperature is higher than 130 degrees, which is the melting point of the film 24, and specifically 160 degrees. The heater 861A heats and melts the first film portion 24B (see FIG. 28A) of the film 24. The melted first film portion 24B is welded to the first pedestal portion 2A (see FIG. 28A) of the pedestal 2. The CPU 201 controls the relay 861B and stops energization of the heater 861A after a predetermined time has elapsed since the heating of the heater 861A was started. Heating of the heater 861A is stopped.

  The CPU 201 controls the drive unit 213 to drive the motor 223 to lower the five heating units 861 (see S33, arrow 184, FIG. 22). The upper side of each of the five heating units 861 is separated from the conveyance path 103. After the five heating units 861 are arranged at the lowest position, the CPU 201 controls the driving unit 213 to stop driving the motor 223. The descent of the five heating units 861 stops.

  The CPU 201 controls the drive unit 216 to drive the motor 226 to move the pair of support members 78 to the separation position (S34). As shown in FIG. 22, the pair of support members 78 swings in the direction of the arrow 185. The holding member 72 is in a state of being separated downward with respect to the holding portion 71B of the pedestal guide member 71. The holding portion 71B and the holding member 72 of the pedestal guide member 71 release the leading end portion 24A of the sandwiched film 24 (see FIG. 28B).

  As illustrated in FIG. 16, the processes in S41 to S46 correspond to the processes in S21 to S26 described above, respectively, and thus the description thereof is partially omitted. In the process of S43, the pedestal 2 is conveyed downstream (see S43, arrow 186, FIG. 22). As shown in FIG. 28B, the first film portion 24B of the film 24 is in a state of being bonded to the first pedestal portion 2A of the pedestal 2 by the process of S32 (see FIG. 16). For this reason, according to the movement of the pedestal 2 to the downstream side, the tip portion 24A of the film 24 on the tip side of the first film portion 24B moves to the downstream side. In addition, the guide rail 74 for moving the cutting part 77 is arrange | positioned under the conveyance path | route 103, and contacts the front-end | tip part 24A of the film 24 from the lower side. For this reason, when the leading end portion 24 </ b> A of the film 24 moves along with the movement of the pedestal 2, the leading end portion 24 </ b> A extends downstream along the transport path 103.

  As shown in FIG. 22, the transport unit 60 moves onto the cradle 13, and the downstream side of the pedestal 2 is transported to the cradle 13. An upstream end (side 902) of the first plate-like portion 905 of the pedestal 2 passes over the pedestal guide member 71. The side 902 of the first plate-like portion 905 of the base 2 crosses the intersection position 105 from the upstream side to the downstream side.

  As shown in FIG. 16, the CPU 201 starts conveyance of the pedestal 2 downstream by the process of S <b> 43 and then starts conveying the pedestal 2 in accordance with the pulse signal output from the encoder 232. The rotation amount of the motor 222 is specified. The CPU 201 determines whether or not the side 902 of the first plate-like portion 905 of the base 2 has moved downstream by the distance L2 (see FIG. 28B) with respect to the intersection position 105. Judge based on quantity. The distance L <b> 2 is slightly longer than the distance between the downstream end of each first extending portion 34 </ b> B of the pair of support members 34 and the pressing roller 30. When the CPU 201 determines that the side 902 of the first plate-like portion 905 of the base 2 has moved to the downstream side by the distance L2 with respect to the intersection position 105, the CPU 201 controls the driving unit 212 to stop driving the motor 222. (S44). The conveyance to the downstream side of the base 2 stops.

  After the monitoring process is completed by the process of S46, the CPU 201 controls the drive unit 214 to drive the motor 224 to move the film moving mechanism 25 from the position before retraction to the position after retraction (S51). The moving member 27 of the film moving mechanism 25 temporarily moves from the lower side of the holding portion 71 </ b> B of the pedestal guide member 71 to the upper side of the transport path 103. Thereafter, the moving member 27 moves again below the transport path 103 and is disposed downstream of the grip roller 81 and below the transport path 103 (see arrow 187, FIG. 22). As shown in FIG. 28C, the moving member 27 moves the leading end portion 24 </ b> A of the film 24 from the lower side of the conveying path 103 and the moving path 104 in the process of moving from the upper side to the lower side of the conveying path 103. Is also moved downstream.

  As shown in FIG. 16, the CPU 201 starts a monitoring process (see FIG. 18) (S52). The CPU 201 executes the monitoring process in parallel with the packaging process. The CPU 201 controls the drive unit 217 to start driving the motor 227 (S53). The roller 654B rotates according to the rotation of the motor 227. The film 24 is forcibly fed from the film roll 22 by rollers 654A and 654B (see arrow 171 and FIG. 27).

  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 (S54). The pressing roller 30 moves from the highest level to the lowest level along the movement path 104. In the course of movement, the pressing rollers 30 and 32 come into contact with the film 24 disposed below from below, and push the film 24 downward (see arrow 188, FIG. 23). 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. As shown in FIG. 23, the plurality of convex portions 81A (see FIG. 14) of the grip roller 81 are formed into the plurality of concave portions 30B (see FIG. 14) of the pressing roller 30 in a state where the pressing mechanism 39 is disposed at the lowest position. Mating. 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. 16, the CPU 201 controls the drive unit 217 to stop driving the motor 227 (S55). The rotation of the roller 654B that has been rotated according to the rotation of the motor 227 stops. The feeding of the film 24 from the film roll 22 by the rollers 654A and 654B (see FIG. 5) stops. The CPU 201 ends the monitoring process (see FIG. 18) started by the process of S52 (S56).

  As shown in FIG. 17, the CPU 201 drives the solenoid 16C to move the connecting gear 652 (see FIG. 5) to the winding position (S61). Thereby, the packaging device 1 is in a state where the rotational driving force of the motor 227 can be transmitted to the winding shaft 23. The CPU 201 controls the drive unit 217 to start driving the motor 227 (S62). In the initialization process of S11, 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. Accordingly, the winding shaft 23 is rotated in accordance with the rotation of the motor 227, and the film 24 is wound on the film roll 22 (see the arrow 172 and FIG. 24). 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.

  The CPU 201 controls the drive unit 212 to rotate the motor 222 in the reverse direction so that the belts 511 and 512 rotate in the reverse direction (S63). The pedestal 2 moves from the downstream side to the upstream side (see arrow 189, FIG. 24). The side 902 of the first plate-like portion 905 of the pedestal 2 contacts the film 24 and pushes it upstream. The left and right side portions of the side 902 of the first plate-like portion 905 of the base 2 are downstream of a gap 3424 (see FIG. 6 and the like) between the first extending portion 342B and the second extending portion 342C of the pressing mechanism 39. Enter from the side. The second extending portion 342C presses the first plate-like portion 905 of the pedestal 2 from above, and suppresses the pedestal 2 from being lifted upward.

  The side 902 of the first plate-like portion 905 of the base 2 approaches the intersection position 105 from the downstream side. A side 902 of the first plate-like portion 905 of the base 2 crosses the intersection position 105 from the downstream side toward the upstream side. The pressing roller 31 of the pressing mechanism 39 contacts the lower surface of the pedestal 2 and moves the pedestal 2 upstream along a gap 3424 (see FIG. 6 and the like) between the first extending portion 342B and the second extending portion 342C. To guide. The side 902 of the first plate-like portion 905 of the pedestal 2 passes above the five heating units 861 and moves upstream. Furthermore, the base 2 moves to the upstream side. The first pedestal portion 2A (see FIG. 28) of the pedestal 2 passes above the five heating units 861 and moves upstream.

  In accordance with the pulse signal output from the encoder 232, the CPU 201 specifies the rotation amount of the motor 222 after starting the conveyance to the upstream side of the base 2 by the process of S63. The CPU 201 determines whether the first pedestal portion 2A of the pedestal 2 has moved upstream by a distance L3 (see FIG. 29D) with respect to the upper position of the five heating units 861 based on the specified rotation amount. . The distance L3 is longer than the width of the first pedestal portion 2A in the transport direction. The first pedestal portion 2A corresponds to a portion of the pedestal 2 where the first film portion 24B of the film 24 is welded by the heater 861A. For this reason, the width in the transport direction of the first pedestal portion 2A is slightly larger than the width in the transport direction of the heater 861A. When the CPU 201 determines that the first pedestal portion 2A of the pedestal 2 has moved the distance L3 upstream from the upper position of the five heating units 861, the CPU 201 controls the drive unit 212 to stop driving the motor 222. (S64). The conveyance of the pedestal 2 stops.

  As shown in FIG. 29 (D), a portion of the lower surface of the pedestal 2 that is upstream from the first pedestal portion 2A by a distance L3 (hereinafter referred to as “second pedestal portion 2B”) is at the top. It arrange | positions in the upper position of the five heating units 861 in the arrange | positioned state. The second pedestal portion 2B is disposed downstream of the first pedestal portion 2A. The second pedestal portion 2B faces the five heating units 861. The film 24 extends from the first film portion 24B welded to the first pedestal portion 2A to the downstream side through the lower side of the second pedestal portion 2B, and contacts the side 901 of the first plate-like portion 905 of the pedestal 2 Then bend upstream. Hereinafter, a portion of the film 24 that faces the second pedestal portion 2B is referred to as a “third film portion 24D”. The third film portion 24D is disposed on the downstream side with respect to the first film portion 24B.

  The film 24 contacts the downstream side, the upper side, and the downstream side of the article 3 and extends upstream, and contacts the side 902 of the first plate-like portion 905 of the base 2 and bends downstream. The film 24 covers the first film portion 24B from the opposite side (lower side) to the first pedestal portion 2A with respect to the first film portion 24B, and extends downstream. Hereinafter, a portion of the film 24 that covers the first film portion 24B from the lower side is referred to as a “fourth film portion 24E”. The first film portion 24 </ b> B is disposed between the first pedestal portion 2 </ b> A of the pedestal 2 and the fourth film portion 24 </ b> E of the film 24.

  The film 24 covers the third film portion 24D from the opposite side (lower side) to the second pedestal portion 2B with respect to the third film portion 24D, and further extends downstream. Hereinafter, a portion of the film 24 that faces the third film portion 24D is referred to as a “second film portion 24C”. The third film portion 24 </ b> D is disposed between the second pedestal portion 2 </ b> B of the pedestal 2 and the second film portion 24 </ b> C of the film 24. The film 24 bends upstream at a portion sandwiched between the grip roller 81 and the pressing roller 30 and extends toward the upstream side. The leading end portion 24A of the film 24 bends upstream in accordance with the upstream movement of the pedestal 2, and passes between the second film portion 24C and the third film portion 24D of the film 24 to the downstream side. Extend.

  As shown in FIG. 17, the CPU 201 starts energizing the electromagnetic brake 82 (S71). Thereby, rotation of the grip roller 81 is regulated. The film 24 sandwiched between the grip roller 81 and the pressing roller 30 is immovable at a portion sandwiched between the plurality of convex portions 81A of the grip roller 81 and the plurality of concave portions 30B of the pressing roller 30. It becomes possible. The length to the part cut | disconnected by the cutting part 77 among the films 24 drawn | fed out from the film roll 22 when the process of S71 is performed is length T0 (refer FIG. 24). The CPU 201 starts a monitoring process (see FIG. 18) (S72). The CPU 201 executes the monitoring process in parallel with the packaging process.

  The CPU 201 controls the drive unit 217 to stop driving the motor 227 (S73). The winding of the film 24 onto the film roll 22 is stopped. The tension acting on the film 24 is released by winding the film 24. Therefore, the film 24 is unwound from the film roll 22 as it is released from the applied tension (see arrow 173, FIG. 25). The film 24 is sandwiched and fixed between the gear of the grip roller 81 and the gear of the pressing roller 30. Thereby, the winding shaft 23 rotates and the connection gear 651 rotates. Here, since the monitoring process is executed by the process of S72, when there is sufficient film 24 of the film roll 22 being used, the rotation amount of the winding shaft 23 is repeatedly acquired by the process of S101 (see FIG. 18). Has been. Therefore, the amount of rotation and the cumulative amount of rotation of the winding shaft 23 rotated by the film 24 being unwound by releasing from the tension are stored in the RAM 203.

  The CPU 201 ends the monitoring process started by the process of S72 before the film 24 is cut by the process of S75, which will be described later, and after a specific time has elapsed after the driving of the motor 227 is stopped by the process of S73 (S74). ). The specific time is at least shorter than the time from when the process of S74 is executed until the process of S75 described later is executed. The specific time is longer than the time from when the driving of the motor 227 is stopped by the process of S73 until the rotation of the connecting gear 651 that rotates when the film 24 is unwound as it is released from the tension. It is preferable.

  The CPU 201 controls the drive unit 215 to drive the motor 225, and moves the cutting unit 77 from the left side to the right side along the guide rail 74 (see FIG. 12) (S75). When the cutting portion 77 moves to the right side, the film 24 is closer to the film roll 22 than the portion sandwiched between the plurality of convex portions 81A of the grip roller 81 and the plurality of concave portions 30B of the pressing roller 30, and The portion extending between the pressing rollers 30 and 32 is cut by the blade portion 771. 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. Of the film 24 fed out from the film roll 22 when the process of S75 is executed, the length to the end of the film 24 is the length T1 (see FIG. 25).

  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 plurality of convex portions 81A of the grip roller 81 and the plurality of concave portions 30B of the pressing roller 30 are fitted to sandwich the film 24, the film 24 is sandwiched between the grip roller 81 and the pressing roller 30. I can not escape from the part. On the other hand, the cut end of the film 24 extending from the film roll 22 hangs downstream of the pedestal guide member 71. Since the length of the film 24 drawn out by releasing the applied tension is not constant, the length of the film 24 depending on the downstream side of the base guide member 71 also varies. For example, when the cut end portion of the film 24 is above the holding portion 71B, the film 24 may not be appropriately held by the process of S86 described later. Furthermore, when the cut end of the film 24 is below the specific position, the film 24 may be caught by a member disposed below the conveyance path 103 such as the pair of support members 78. The specific position is a position at least below the holding portion 71 </ b> B, and is a height position at which the cut ends of the film 24 are not caught by members such as the pair of support members 78. In these cases, there is a possibility that the packaging apparatus 1 may not be able to smoothly perform the next packaging operation. Therefore, the packaging device 1 according to the present invention executes the following processing.

  The CPU 201 reads the value of the cumulative rotation amount of the winding shaft 23 stored in the RAM 203 by the process of S102 in the monitoring process started by the process of S72 (S81). Hereinafter, the cumulative rotation amount of the winding shaft 23 read out in the process of S81 is referred to as “specific rotation amount”. The specific rotation amount is the accumulated rotation amount of the winding shaft 23 stored in the monitoring process started by the processing of S72 and stopped by the processing of S74 among the accumulated rotation amounts of the winding shaft 23 stored in the processing of S101. It is. In the present embodiment, the process of S72 is executed when the film 24 cannot move between the gear of the grip roller 81 and the gear of the pressing roller 30 by the process of S71. The process of S74 is executed before the film 24 is cut by the process of S75. The specific rotation amount is, for example, the rotation amount of the winding shaft 23 when the film 24 is rotated by being fed out from the film roll 22 by releasing from the tension in the process of S73. The CPU 201 calculates a normal rotation amount by applying a predetermined calculation formula to the roll diameter (film remaining amount) acquired by the processing of S12 and stored in the RAM 203 (S82). The normal rotation amount is the rotation amount of the winding shaft 23 for winding or unwinding the film 24 from the film roll 22 by a predetermined length. In the present embodiment, the predetermined length is, for example, a length from a position where the film 24 is cut by the cutting portion 77 to a position near the lower side of the holding portion 71B, and is set in advance. The predetermined calculation formula is a formula that can calculate the normal rotation amount based on the roll diameter.

  The CPU 201 calculates an actual rotation amount that is the sum of the specific rotation amount specified by the process of S81 and the normal rotation amount calculated by the process of S82 (S83). The CPU 201 controls the drive unit 217 to start driving the motor 227 (S84). Since the connecting gear 651 is in the winding position by the process of S61, the film 24 is wound on the film roll 22 (see the arrow 192 and FIG. 26). The CPU 201 continues the control of winding the film 24 by controlling the drive unit 217 to drive the motor 227 until the process of S85 described later. The CPU 201 updates the cumulative rotation amount of the winding shaft 23 stored in the RAM 203 in accordance with the pulse signal output from the encoder 40 when the motor 227 rotates.

  Based on the accumulated amount of rotation of the winding shaft 23 stored in the RAM 203, the CPU 201 starts feeding the film 24 by the processing of S84 and then rotates the winding shaft 23 by the actual rotation amount calculated by the processing of S83. Determine if you did. When determining that the winding shaft 23 has rotated by the calculated actual rotation amount, the CPU 201 controls the driving unit 217 to stop the driving of the motor 227 (S85). Winding of the film 24 stops. Of the film 24 fed out from the film roll 22 when the process of S85 is executed, the length to the end of the film 24 is a length T2 (see FIG. 26).

  As described above, the film 24 is wound by a length corresponding to the actual rotation amount. The actual rotation amount is the sum of the specific rotation amount and the normal rotation amount. The length according to the specific rotation amount is the length of the difference between the length T1 and the length T0. The length (predetermined length) corresponding to the normal rotation amount is a difference length between the length T0 and the length T2. That is, the length according to the actual rotation amount is the length of the difference between the length T1 and the length T2. Therefore, when the film 24 is wound by a length corresponding to the actual rotation amount, the film 24 is wound until the end portion cut by the cutting portion 77 moves to a position near the lower side of the holding portion 71B. Thereby, when the film 24 is cut by the process of S75 and the driving of the motor 227 is stopped by the process of S85, the end part of the film 24 is in a position near the lower side of the holding part 71B.

  The CPU 201 controls the drive unit 216 to drive the motor 226 to move the pair of support members 78 to the close positions (S86). As shown in FIG. 26, the pair of support members 78 swings in the direction of the arrow 190. The holding member 72 is in a state of being close to the holding portion 71 </ b> B of the pedestal guide member 71. Since the end portion of the film 24 cut by the cutting portion 77 is in the vicinity of the lower side of the holding portion 71B by the above-described processing, the leading end portion 24A of the film 24 is connected to the holding portion 71B of the base guide member 71 and the holding member. 72. Thereby, the packaging apparatus 1 will be in the state which can perform the next packaging operation | movement smoothly.

  As shown in FIG. 16, the CPU 201 controls the drive unit 213 to drive the motor 223 and raise the five heating units 861 (S91). After the five heating units 861 are arranged at the uppermost position, the CPU 201 controls the drive unit 213 to stop driving the motor 223 and stop the five heating units 861 from rising. As shown in FIG. 26, when the five heating units 861 are raised to the top (arrow 191), the upper sides of the five heating units 861 approach the transport path 103 from below.

  As shown in FIG. 29 (E), the upper positions of the five heating units 861 are the second pedestal portion 2B of the pedestal 2, the second film portion 24C of the film 24, the third film portion 24D, and the tip portion 24A. Is placed. By arranging the five heating units 861 at the top, the second film portion 24C, the third film portion 24D, and the tip portion 24A of the film 24 are stacked in three layers, and the second film portion 24C of the base 2 is stacked. It is sandwiched between the base portion 2B and the five heating units 861.

  As shown in FIG. 16, the CPU 201 controls the relay 861B, energizes the heater 861A, and heats the heater 861A to the second temperature (S92). The second temperature is lower than the first temperature, specifically 130 degrees which is the melting point of the film. As shown in FIG. 29E, the heater 861A heats and melts the second film portion 24C, the third film portion 24D, and the tip portion 24A of the film 24. The melted films 24 are welded together. Since the second temperature is lower than the temperature (first temperature) of the heater 861A when the first film portion 24B of the film 24 is welded to the first pedestal portion 2A of the pedestal 2, the second pedestal portion of the pedestal 2 is used. The film 24 is not welded to 2B. The CPU 201 controls the relay 861B and stops energization of the heater 861A after a predetermined time has elapsed since the heating of the heater 861A was started. Heating of the heater 861A is stopped.

  As shown in FIG. 16, the CPU 201 controls the drive unit 213 to drive the motor 223 to lower the five heating units 861 (see S <b> 93, arrow 192, FIG. 27). The upper surfaces of the five heating units 861 are separated from the transport path 103. The CPU 201 controls the driving unit 213 to stop the rotation of the motor 223.

  As shown in FIG. 16, the CPU 201 stops energization of the electromagnetic brake 82 (S94). As a result, the grip roller 81 becomes rotatable. The CPU 201 controls the drive unit 212 to rotate the motor 222 in the forward direction so that the belts 511 and 512 rotate in the forward direction (S95). The pedestal 2 and the article 3 that have been packaged are conveyed downstream (see arrow 193 and FIG. 27). The CPU 201 controls the drive unit 211 to drive the motor 221 to move the pressing mechanism 39 from the lowest level to the highest level (S96). The pressing roller 30 moves from the lowest position to the highest position along the movement path 104. The CPU 201 controls the drive unit 214 to drive the motor 224 to move the film moving mechanism 25 from the post-retraction position to the pre-retraction position (S97). The CPU 201 ends the packaging process.

  FIG. 29F shows a package 93 packaged through the above steps. The pedestal 2 and the article 3 are packaged by being wound around the belt-like film 24 one or more times. The first film portion 24B of the film 24 and the first pedestal portion 2A of the pedestal 2 are welded. Here, three regions 905A, 905B, and 905C obtained by dividing the first plate-like portion 905 of the base 2 into three equal parts in the transport direction are defined. The regions 905A, 905B, and 905C are arranged in order from the downstream side along the transport direction. The direction in which the regions 905A, 905B, and 905C are arranged corresponds to the direction in which the film 24 is wound around the base 2. At this time, the first pedestal portion 2A is included in the region 905C.

  The second film portion 24C, the third film portion 24D, and the tip portion 24A of the film 24 are welded to each other at a position facing the second pedestal portion 2B of the pedestal 2 downward. The second pedestal portion 2B of the pedestal 2 is spaced downstream from the first pedestal portion 2A. The first film portion 24B of the film 24 is disposed between the first pedestal portion 2A of the pedestal 2 and the fourth film portion 24E of the film 24.

<Main effects of the above embodiment>
As described above, the rotation amount of the winding shaft 23 is acquired based on the rotation of the winding shaft 23 detected by the encoder 40 (S101). When the article 3 is packaged by the film 24, a portion of the film 24 different from the portion where the article 3 is packaged is held by the grip roller 81 and the pressing roller 30 (S71). The part of the film 24 closer to the film roll 22 than the part held by the grip roller 81 and the pressing roller 30 is cut by the cutting part 77 (S75). The rotational drive of the motor 227 that winds or unwinds the film 24 with respect to the film roll 22 mounted on the mounting members 141 and 142 is controlled (S22, S25, S42, S44, S53, S55, S62, S73, S84). , S85). Here, in any period from when the film 24 is held by the grip roller 81 and the pressing roller 30 by the process of S71 to before the rotational driving of the motor 227 is started by the process of S84, the film 24 is It may be wound or unwound. For example, when the film 24 is cut in a state where tension is applied, the film 24 may be wound around the film roll 22 by releasing from the tension. In some cases, the user rotates the film roll 22 and the film 24 is taken up or fed out. In accordance with the specific rotation amount acquired by the process of S101 executed in the monitoring process that is started by the process of S72 and finished by the process of S74, the CPU 201 executes the motor according to the rotation amount of the winding shaft 23 acquired. The rotational drive of 227 is controlled (S84, S85). Thereby, the length of the film 24 fed out from the film roll 22 can be adjusted at least by the specific rotation amount. Therefore, the packaging apparatus 1 can suppress variations in the length of the film 24 (length T1—length T0) that is fed from the film roll 22 after the film 24 is cut. Thereby, the packaging apparatus 1 can arrange | position the cut | disconnected edge part of the film 24 in a specific position, and can hold | maintain the front-end | tip part 24A of the film 24 appropriately with the holding | maintenance part 71B and the holding member 72, Therefore It can be done smoothly.

  For example, when the end of the cut film 24 is below the specific position, the film 24 may be caught by a member disposed below the conveyance path 103 such as the pair of support members 78. In this case, there arises a problem that the film 24 is not properly held by the holding portion 71B and the holding member 72. On the other hand, when the edge part of the film 24 after a cutting | disconnection exists above the holding | maintenance part 71B, the problem that the film 24 is not hold | maintained by the holding | maintenance part 71B and the holding member 72 arises. In this embodiment, the film remaining amount which is the amount of the film 24 wound around the winding shaft 23 is acquired (S12). Based on the acquired film remaining amount, a normal rotation amount is calculated (S82). The normal rotation amount is an amount by which the winding shaft 23 rotates to wind or feed the film 24 by a predetermined length with respect to the film roll 22 mounted on the mounting members 141 and 142. The CPU 201 controls the rotation drive of the motor 227 according to the calculated normal rotation amount in addition to the acquired specific rotation amount (S84, S85). Thereby, after the film 24 is cut, the packaging device 1 can adjust the length of the film 24 fed from the film roll 22 mounted on the mounting members 141 and 142 by a certain amount. Therefore, the packaging device 1 can appropriately hold the film 24 by the holding portion 71B and the holding member 72 after the film 24 is cut. Thereby, the packaging device 1 can smoothly perform the next packaging operation.

  The packaging device 1 includes an encoder 40 that can detect the rotation of the winding shaft 23. Therefore, the packaging device 1 can detect the rotation of the winding shaft 23 with an inexpensive and simple structure as compared with the case where another detection device (for example, an image recognition device) capable of detecting the rotation amount of the winding shaft 23 is provided.

  When the rotational driving force of the motor 227 is transmitted, the winding shaft 23 can be wound around the film roll 22 mounted on the mounting members 141 and 142 by rotating with the rotational driving of the motor 227. It is. The encoder 40 detects the amount of rotation of the winding shaft 23 based on the rotation of the winding shaft 23. The packaging device 1 includes rollers 654A and 654B provided independently of the winding shaft 23. The rollers 654A and 654B come into contact with the film 24 fed out from the film roll 22 mounted on the mounting members 141 and 142, respectively. When the rotational driving force of the motor 227 is transmitted, the rollers 654 </ b> A and 654 </ b> B can feed the film 24 from the film roll 22 mounted on the mounting members 141 and 142 by rotating with the rotational driving of the motor 227. It is. When the rollers 654A and 654B are rotating with the rotation of the motor 227, the transmission of the rotational driving force of the motor 227 to the winding shaft 23 is released. According to this configuration, when the film 24 is fed from the film roll 22 mounted on the mounting members 141 and 142, the winding shaft 23 rotates as the film 24 is fed. On the other hand, when there is no film 24 wound around the winding shaft 23, even if the rollers 654 </ b> A and 654 </ b> B rotate with the rotation of the motor 227, the film 24 is not fed out, so the winding shaft 23 does not rotate. Here, when the rollers 654A and 654B are rotating in accordance with the rotational drive of the motor 227 (S22 to S25, S42 to S44, S53 to S55, S62 to S73, S84 to S85), the acquisition is performed by the processing of S101. Based on the rotation amount of the wound winding shaft 23, it is determined whether the winding shaft 23 is rotating (S102). When it is determined that the winding shaft 23 is not rotating (S102: NO), at least the control of the rotational drive of the motor 227 by the CPU 201 is stopped (S103). Therefore, the packaging apparatus 1 can stop the packaging operation when the film 24 of the film roll 22 mounted on the mounting members 141 and 142 is used up.

  Before the film 24 is cut (S75), the solenoid 16C is driven to move the connecting gear 652 (see FIG. 5) to the winding position (S16), and the driving of the motor 227 is started (S62). Thereby, the film 24 is wound up and tension is applied. After the driving of the motor 227 is started (S62), before the film 24 is cut (S75), the driving of the motor 227 is stopped (S73). Thereby, the film 24 is cut in a state of being released from the applied tension. When the film 24 is released from the tension applied by the cutting, the film 24 is wound around the film roll 22 or the stretched film 24 rapidly returns to the original state, so that the cut portion is deformed. There is a case. In the packaging device 1, the film 24 is released from the applied tension before it is cut. Therefore, after the film 24 is cut, the film 24 is restrained from being wound around the film roll 22 as the tension is released. Furthermore, the change of the state of the film 24 before and after cutting is suppressed.

The monitoring process is started by the process of S72 and is ended by the process of S74. The process of S72 is executed when the film 24 is held by the process of S71. The process of S74 is executed after the elapse of a specific time after the driving of the motor 227 is stopped by the process of S73 and before the film 24 is cut by the process of S75. Therefore, the packaging device 1 can acquire the rotation amount of the winding shaft 23 while the monitoring process is executed after the film 24 is held by the process of S71. Furthermore, since the process of S74 is performed before the film 24 is cut by the process of S75, the packaging device 1 is configured to detect the winding shaft 23 acquired by the monitoring process after the film 24 is cut by the process of S75. Processing based on the rotation amount can be executed immediately. Thereby, the packaging apparatus 1 can shorten the time concerning a packaging process.

<Correspondence description>
The mounting members 141 and 142 correspond to the “mounting part” of the present invention. The grip roller 81 and the pressing roller 30 correspond to the “holding mechanism” of the present invention. The cutting part 77 corresponds to the “cutting mechanism” of the present invention. The drive unit 217 corresponds to the “drive unit” of the present invention. The encoder 40 corresponds to the “detection unit” and “encoder” of the present invention. The CPU 201 that executes the process of S101 in FIG. 18 corresponds to the “first acquisition unit” of the present invention. The CPU 201 that executes the process of S71 in FIG. 17 corresponds to the “holding unit” of the present invention. The CPU 201 that executes the process of S75 in FIG. 17 corresponds to the “cutting unit” of the present invention. The CPU 201 that executes the processes of S84 and S85 in FIG. 17 corresponds to the “rotation control means” of the present invention. The CPU 201 that executes the process of S12 in FIG. 16 corresponds to the “second acquisition unit” of the present invention. The CPU 201 that executes the process of S82 in FIG. 17 corresponds to the “calculation unit” of the present invention. The roller 654B corresponds to the “roller” of the present invention. The CPU 201 that executes the process of S14 in FIG. 16 corresponds to the “release means” of the present invention. The CPU 201 that executes the process of S102 in FIG. 18 corresponds to the “determination unit” of the present invention. The CPU 201 that executes the process of S103 in FIG. 18 corresponds to the “first stop control unit” of the present invention. The CPU 201 that executes the process of S62 in FIG. 17 corresponds to the “winding control means” of the present invention. The CPU 201 that executes the process of S73 in FIG. 17 corresponds to the “second stop control means” of the present invention. The RAM 203 corresponds to the “storage unit” of the present invention. The CPU 201 that executes the process of S101 of FIG. 18 in the monitoring process executed by the process of S72 of FIG. 17 corresponds to the “storage unit” of the present invention. The CPU 201 that executes the process of S81 in FIG. 17 corresponds to the “reading unit” of the present invention.

<Modification>
The present invention is not limited to the above embodiment, and various modifications can be made. For example, the CPU 201 of the packaging device 1 may execute S731 to 751 shown in FIG. 30 instead of S73 to S75. Hereinafter, with reference to FIG. 30, the packaging apparatus 1 of a modification is demonstrated. The description of the same steps as those in the above embodiment is omitted. Before S731 is executed, the film 24 is in a state in which tension is applied to the winding shaft 23 because a force rotating in the direction of winding the film 24 is applied to the winding shaft 23 by the processing of S61 and S62. After starting the monitoring process (see FIG. 18) by the process of S72, the CPU 201 cuts the film 24 (S731), controls the drive unit 217, and stops driving the motor 227 (S741). In this case, since tension is applied to the film 24, the packaging device 1 can easily cut the film 24. When the film 24 is cut in a state where the tension is applied, the film 24 is wound around the film roll 22 by the release from the tension and the driving force of the motor 227. Since the monitoring process is started by the process of S72, the rotation amount of the winding shaft 23 rotated by the release from the tension and the driving force of the motor 227 by the process of S101 is stored in the RAM 203 (S101). The CPU 201 ends the monitoring process (S751). In this case, the rotation amount of the winding shaft 23 rotated after the film 24 is cut can also be detected. Further, the process of S72 may be executed after the process of S731. In addition, although CPU201 winds up the film 24 in the process of S84, you may pay out. In this case, the CPU 201 may control the solenoid 16C and move the connecting gear 652 to the extended position before the process of S84. The CPU 201 may determine whether to wind or unwind the film 24 based on the rotation amount of the winding shaft 23.

  In the above embodiment, the monitoring process executed in the process of S72 is performed after the film 24 is sandwiched between the grip roller 81 and the pressing roller 30 by the process of S71 and before the film 24 is cut by the process of S75. It is running until. However, in the monitoring process, the film 24 is sandwiched between the grip roller 81 and the pressing roller 30 by the process of S71 and before the film 24 is sandwiched by the holding portion 71B and the holding member 72 by the process of S86. It may be executed for a predetermined period.

  In the above embodiment, the CPU 201 may move the connecting gear 652 to the extended position instead of controlling the driving unit 217 to stop driving the motor 227 in the process of S73. In this case, the film 24 is forcibly drawn out from the film roll 22. Since the drive of the motor 227 is controlled, the amount of the film 24 fed out from the film roll 22 is stabilized. Furthermore, since there is no release from tension, deformation of the film 24 is suppressed. In this case, the CPU 201 may stop the motor 227 by controlling the driving unit 217 when the film 24 having a specific length is fed out. The CPU 201 may execute the process of S74 after the motor 227 is stopped and before the film 24 is cut by the process of S75, and end the monitoring process. In this case, since the monitoring process is completed before the film 24 is cut by the process of S74, the packaging device 1 uses the winding shaft 23 acquired by the monitoring process after the film 24 is cut by the process of S74. It is possible to immediately execute processing based on the amount of rotation and the like. When winding the film 24 in the process of S84, the CPU 201 may control the solenoid 16C to move the connecting gear 652 to the winding position before the process of S84. In the process of S73, instead of controlling the drive unit 217 and stopping the driving of the motor 227, the CPU 201 that moves the connecting gear 652 to the extended position corresponds to the “advance control means” of the present invention.

  The encoder 40 is not limited to the above-described incremental metal type rotary encoder, and may be, for example, an absolute type. The packaging device 1 may include a member that can detect the rotation of the winding shaft 23 instead of the encoder 40. For example, the rotation of the winding shaft 23 may be detected using a known image recognition technique. In this case, the position where the image recognition camera is provided is not particularly limited. In the above embodiment, the encoder 40 is provided coaxially with the connection gear 651, but is not limited to this as long as it is provided at a position that rotates in synchronization with the winding shaft 23. For example, it may be provided coaxially with the winding shaft 23. In this case, since no other member (for example, the connection gear 651) is interposed, the packaging device 1 can acquire an accurate rotation amount of the winding shaft 23. The method of holding the film 24 by the process of S71 and the method of cutting the film 24 by the process of S75 are not limited to the above embodiments, respectively.

  In the above embodiment, the roller 654B and the connection gear 651 rotate by selectively transmitting the driving force of the motor 227 by controlling the solenoid 16C. On the other hand, the packaging device 1 may include two motors, a motor that rotates the roller 654B and a motor that rotates the connection gear 651. In the process of S73, the CPU 201 may stop driving the motor that rotates the connecting gear 651 instead of controlling the driving unit 217 to stop driving the motor 227. Further, at this time, the CPU 201 may start driving a motor that rotates the roller 654B.

  The packaging device 1 may not include the rollers 654A and 654B. In this case, for example, the CPU 201 may control winding and unwinding of the film 24 by performing control to rotate the motor 227 in one direction and the other. In this case, a member such as a timing belt may not be provided. The CPU 201 does not have to execute the processes of S102 and S103. In the process of S103, the CPU 201 stops the driving of the motors 221 to 227 and notifies an error. However, at least the driving of the motor 227 may be stopped, and the power supply of the packaging device 1 may be stopped.

  The CPU 201 may not execute the process of S62. In this case, since the motor 227 is not driven when executing the process of S73, the CPU 201 does not need to execute the process of S73. In the above embodiment, the CPU 201 acquires the film remaining amount (S12), and calculates the normal rotation amount based on the acquired film remaining amount (S82), but the processing of S12 and S82 may not be executed. . In this case, the film 24 is wound or unwound by the specific rotation amount by the processes of S83 and S85. The predetermined length corresponding to the normal rotation amount may be appropriately changed and set by the user. The predetermined length and the normal rotation amount may be “0”.

  In the above embodiment, the CPU 201 calculates the actual rotation amount (S83), and performs drive control of the motor 227 based on the actual rotation amount (S82, S83). On the other hand, the CPU 201 does not execute the process of S83, performs drive control of the motor 227 based on the specific rotation amount specified by the process of S81, and then performs a motor control based on the normal rotation amount calculated by the process of S82. The drive control of 227 may be performed.

  In the above embodiment, the CPU 201 acquires the roll diameter (film remaining amount) input by the user via the operation unit 206 (S12), but the method for acquiring the film remaining amount is not limited to this. The CPU 201 may acquire the film remaining amount by, for example, acquiring the weight of the film. The film roll 22 may include an ID chip or the like in which data indicating the remaining film amount is updated and stored. In this case, the packaging device 1 may acquire the film remaining amount by reading data indicating the film remaining amount from an ID chip or the like included in the film roll 22. In the above embodiment, the CPU 201 stores various values in the RAM 203, but may store them in the flash memory 202.

DESCRIPTION OF SYMBOLS 1 Packaging apparatus 2 Base 3 Goods 16C Solenoid 22 Film roll 23 Winding shaft 24 Film 30-32 Pressing roller 40 Encoder 77 Cutting part 81 Grip roller 141, 142 Mounting member 201 CPU
202 Flash memory 203 RAM
211-217 Driving part 221-227 Motor 654A, 654B Roller

Claims (8)

A mounting portion capable of mounting a film roll having a rotatable winding shaft and a film wound around the winding shaft is provided, and an article is packaged by the film fed from the film roll mounted on the mounting portion. A packaging device,
A holding mechanism for holding a portion different from a portion in which the article is packaged, of the film fed from the film roll attached to the attachment portion;
A cutting mechanism that cuts a part on the film roll side of a part of the film fed from the film roll attached to the attachment part rather than a part held by the holding mechanism;
A drive unit that winds or unwinds the film with respect to the film roll mounted on the mounting unit by being rotationally driven,
A detector for detecting rotation of the winding shaft;
First acquisition means for acquiring the amount of rotation of the winding shaft based on the rotation of the winding shaft detected by the detection unit;
Holding means for holding the film by the holding mechanism when the article is packaged by the film;
A cutting means for cutting the film by the cutting mechanism after the film is held by the holding means;
Rotation control means for controlling the rotational drive of the drive unit after the film is cut by the cutting means,
The rotation control means is configured to drive the rotation of the drive unit by the rotation control means from when the film is held by the holding means out of at least the amount of rotation of the winding shaft acquired by the first acquisition means. A packaging device, wherein the rotational drive of the drive unit is controlled in accordance with a specific rotational amount in any period before the time is controlled. Second acquisition means for acquiring a film remaining amount that is the amount of the film wound around the winding shaft;
Based on the film remaining amount acquired by the second acquisition means, rotation of the winding shaft for winding or unwinding the film by a predetermined length with respect to the film roll mounted on the mounting portion. Calculating means for calculating a normal rotation amount that is a quantity,
The rotation control unit controls the rotation drive of the drive unit according to the specific rotation amount acquired by the first acquisition unit and the normal rotation amount calculated by the calculation unit. The packaging device according to claim 1.   The packaging device according to claim 1, wherein the detection unit includes an encoder. When the rotational driving force of the driving unit is transmitted, the winding shaft can be wound around the film roll mounted on the mounting unit by rotating with the rotational driving of the driving unit. Because
The detection unit detects the amount of rotation of the winding shaft based on the rotation of the winding shaft,
The packaging device comprises:
A roller provided independently of the winding shaft,
Contacting the film fed out from the film roll mounted on the mounting portion;
When the rotational driving force of the driving unit is transmitted, by rotating with the rotational driving of the driving unit, a roller capable of feeding the film from the film roll mounted on the mounting unit;
A release means for releasing transmission of the rotational driving force of the driving unit to the winding shaft when the roller is rotating with the rotational driving of the driving unit;
Judgment of determining whether the winding shaft is rotating based on the amount of rotation of the winding shaft acquired by the first acquisition means when the roller is rotating in accordance with the rotational drive of the driving unit. Means,
And a first stop control unit that stops at least the rotation control of the drive unit by the rotation control unit when the determination unit determines that the winding shaft is not rotating. The packaging device according to any one of claims 1 to 3. The rotation control means includes
Before the film is cut by the cutting means, the rotational drive of the drive unit is controlled so as to rotate the winding shaft in a direction in which the film is wound around the film roll mounted on the mounting unit. Winding control means;
Before the film is cut by the cutting means, and after the rotation drive of the drive unit is controlled by the winding control means, second stop control means for stopping the rotation drive of the drive unit; The packaging apparatus according to claim 1, wherein the packaging apparatus is provided. The rotation control means includes
Before the film is cut by the cutting means, the rotational drive of the drive unit is controlled so as to rotate the winding shaft in a direction in which the film is wound around the film roll mounted on the mounting unit. Winding control means;
Before the film is cut by the cutting means, and after the rotation drive of the drive unit is controlled by the winding control means, the film is fed out from the film roll attached to the attachment part. The packaging apparatus according to any one of claims 1 to 4, further comprising: a feeding control unit that controls rotational driving of the driving unit so as to rotate the winding shaft in a direction. One of the periods is a period from the first timing to the second timing,
The first timing is when the film is held by the holding means,
The second timing is any timing between the time when the rotation of the driving unit is stopped by the second stop control unit and the time before the film is cut by the cutting unit. The packaging device according to claim 5. One of the periods is a period from the first timing to the second timing,
The first timing is when the film is held by the holding means,
The second timing is any timing between the end of the rotation control of the driving unit by the feeding control unit and the time before the film is cut by the cutting unit. The packaging device according to claim 6.

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