JP6376104B2 - Packaging equipment - Google Patents

Description

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

  There has been proposed a packaging apparatus that covers and wraps a part of an article with a film in a state where the article is placed on a plate-like pedestal. For example, the packaging apparatus described in Patent Document 1 holds a film roll around which a film is wound above a conveyance surface through which a pedestal passes during conveyance. The film drawn out from the film roll is disposed at a position that intersects the transport surface. The end of the drawn film is held below the transport surface. The article and the pedestal are transported toward the film from the upstream side in the transport direction. The film is pulled downstream in contact with the pedestal and the article. Next, a guide roller that guides the film guides the film upstream of the pedestal and the article. Next, the motor which rotates a film roll winds up a film with the torque which the user set. Next, the base and the article are conveyed toward the upstream side. The film contacts the upstream end of the pedestal and is pulled upstream by the pedestal. The guide roller guides the film to the lower part of the pedestal. Further, the tension according to the motor torque acts on the film, and the film adheres to the article. Next, the edge part of a film is welded to the lower surface of a base. As described above, the article placed on the pedestal is packaged with the film.

JP2015-30524A

  The outer diameter of the film roll changes depending on the remaining amount of the film. Therefore, the packaging apparatus needs to perform complicated motor drive control in accordance with the remaining amount of the film in order to maintain the torque at which the motor winds the film at the torque set by the user. Further, the packaging device has to manage the remaining amount of film.

  An object of this invention is to provide the packaging apparatus which can perform by carrying out simple packaging which provides a film with the tension | tensile_strength appropriate for packaging of articles | goods, and performs packaging.

The packaging apparatus according to the present invention is a packaging apparatus that wraps a pedestal and an article placed on the pedestal with a film, a conveyance mechanism that conveys the pedestal on which the article is placed, and the conveyance mechanism. Provided above the transport path of the pedestal that is transported by the mounting unit, the mounting unit capable of mounting a film roll around which the film is wound, and the film fed out from the film roll mounted on the mounting unit A restraining mechanism that has a possible contact portion and suppresses movement of the film in a feeding direction that is a moving direction of the film when the film is fed out from the film roll, and an upper position above the transport path Pressing down the film that has been unwound from the film roll downward from above by moving from the lower position to the lower position The upstream end of the pedestal arranged upstream in the transport direction of the pedestal with respect to the crossing position at which the roller, the transport path, and the movement path of the pressing roller intersect, The first moving means for moving the pedestal to the downstream side by the transfer mechanism until the pedestal is moved by the first moving means until the pedestal is moved downstream of the pedestal in the transfer direction, A second moving means for moving the pressing roller from the upper position to the lower position along a moving path; and after the pressing roller is moved by the second moving means, the upstream end of the pedestal A third moving means for moving the pedestal until the pedestal is disposed upstream of the pressing roller, and at least a part of the period for moving the pedestal by the third moving means. First load means that contacts the film with the film and suppresses movement of the film in the feeding direction according to the movement of the pedestal by applying a first load in a direction opposite to the feeding direction. And after the movement of the pedestal by the third moving means is finished, the cutting means for cutting the film by a cutting mechanism and cutting off the part of the film covering the article from the film roll, and the width of the film a first acquisition unit configured to acquire, the first load means, characterized in that the action has been a large load greater the width of the film obtained by the first obtaining means to said film.

The packaging device covers the periphery of the article with the film by moving the pedestal and the article to the downstream side, and guiding the film to the upper side of the article by a pressing roller. Next, the packaging apparatus brings the film into close contact with the article by moving the base and the article upstream. Here, the packaging device brings the contact portion of the suppression mechanism into contact with the film for at least a part of the period in which the pedestal and the article are moved upstream. The feeding of the film from the film roll due to the movement of the pedestal and the article to the upstream side is suppressed by the first load acting in the opposite direction acting on the film. In this case, since the feeding of the film from the film roll, which is necessary when the pedestal and the article move upstream, is restricted, the film has a stronger tension than when the first load does not act. Works. For this reason, the packaging device can wrap the film in close contact with the article. Even when the load acting on the film is common, the tension applied to the film varies depending on the width of the film. Specifically, the greater the film width, the smaller the tension applied to the film. On the other hand, a packaging apparatus enlarges the load made to act on a film by a suppression mechanism, so that the width | variety of a film is large. Thereby, even when the width of the film changes, a constant tension can be applied to the film.

  Moreover, in the above, a packaging apparatus suppresses the movement to the drawing | feeding-out direction of a film, and makes a 1st load act on a film by making the contact part of a suppression mechanism contact the film drawn | fed out from the film roll. For this reason, the packaging device can apply the first load to the film regardless of the remaining amount of the film remaining on the film roll. Therefore, the packaging device does not need to perform complicated motor control according to the remaining amount of film. For this reason, the packaging device can execute packaging by applying a tension appropriate for packaging of the article to the film and performing packaging.

  In this invention, the said suppression mechanism may make the said contact part contact the side opposite to the said film roll side rather than the part cut | disconnected by the said cutting mechanism among the said films. In this case, the suppression mechanism can apply a load to the film separated from the film roll by the cutting mechanism. Therefore, the packaging device can maintain a state in which tension is applied to the film covering the article when the film is cut by the cutting mechanism.

  In the present invention, when the film is cut by the cutting means, the contact portion of the suppression mechanism is brought into contact with the film, and the film moves in the feeding direction according to the movement of the pedestal. The film is cut out of the film in a state in which the second load is applied to the film in the opposite direction by the second load means and the second load means that suppresses the second load by applying the second load in the opposite direction. The second load may be larger than the first load. In this case, the packaging apparatus can suppress the movement of the film in the feeding direction after the film is separated from the film roll by the cutting mechanism and before the film is welded to the pedestal. For this reason, the packaging device can weld the film to the pedestal in a state where tension is applied to the film that covers the article, and wrap the article with the film. Moreover, the movement to the drawing | feeding-out direction of a film can be suppressed appropriately by making 2nd load larger than 1st load.

  According to the present invention, the second acquisition unit that acquires the film type, the film type, and the parameter that can specify the load are associated with each other and acquired by the second acquisition unit based on information stored in the storage unit. Determining means for determining a load corresponding to the type of the determined load, wherein the first load means may cause the load determined by the determining means to act on the film. Even when the load acting on the film is common, the tension applied to the film varies depending on the type of film. On the other hand, the packaging device determines the load according to the type of film based on the information stored in the storage unit. Thereby, even when the kind of film changes, a fixed tension can be applied to the film.

  In this invention, the said contact part of the said suppression mechanism has a grip roller which can pinch | interpose the said film between the said pressing rollers in the said lower position, The said suppression mechanism is rotation of the said grip roller. By suppressing, movement of the film in the feeding direction may be suppressed. In this case, the packaging device can suppress the movement of the film with respect to the pressing roller and the grip roller by restricting the rotation of the grip roller. For this reason, the packaging apparatus can apply the load of the opposite direction to a film according to a base and goods moving to an upstream.

  In the present invention, the suppression mechanism may include an electromagnetic brake capable of adjusting a rotational torque of the grip roller. In this case, the suppression mechanism can suppress the movement of the film in the feeding direction by adjusting the rotational torque of the grip roller. Further, the suppression mechanism can change the magnitude of the load acting on the film by adjusting the rotational torque of the grip roller. Furthermore, the suppression mechanism can easily adjust the rotational torque of the grip roller by an electromagnetic brake.

  In the present invention, there is provided third acquisition means for acquiring a parameter indicating the tension of the film, and the first load means suppresses movement of the film during movement of the pedestal and the article by the third movement means. You may change the timing to start according to the said parameter acquired by the said 3rd acquisition means. The amount of the film fed out from the film roll in response to the movement of the pedestal and the article changes in accordance with the timing at which the suppression of the movement of the film is started. The magnitude of the tension applied to the film changes according to the amount of film fed out from the film roll. Therefore, the packaging apparatus can apply the tension according to the acquired parameter to the film by controlling the timing at which the suppression of the movement of the film is started.

  In the present invention, a rotation mechanism that rotates the film roll in a winding direction in which the film is wound on the film roll, a first state in which a rotational driving force of the rotation mechanism is transmitted to the film roll, and the rotation A switching mechanism capable of switching to a second state in which driving force is not transmitted to the film roll, and the movement of the pedestal by the third moving means is started after the movement of the pressing roller by the second moving means is completed. Until the end of the rotation, the switching mechanism is switched to the first state, the winding mechanism rotates the film roll in the winding direction, and the film roll is rotated by the winding means. Switching means for switching the switching mechanism to the second state, and the third moving means includes the switching mechanism. In a state in which instead mechanism is switched to the second state, it may move the pedestal. In this case, the feeding of the film from the film roll in response to the movement of the pedestal and the article upstream can be prevented from being hindered by the rotation mechanism.

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 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 suppression mechanism 80. FIG. 4 is a perspective view of a pedestal guide member 71, a suppression mechanism 80, and a film moving mechanism 25. FIG. 4 is a perspective view of a pressing mechanism 39, a suppression mechanism 80, and a film moving mechanism 25. FIG. 4 is a right side view of a pressing mechanism 39, a suppression mechanism 80, and a film moving mechanism 25. FIG. 2 is a block diagram showing an electrical configuration of the packaging device 1. FIG. It is a figure which shows the table 202A. It is a flowchart of a packaging process. It is a figure which shows the packaging process by a packaging process. It is a figure which shows the packaging process by 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 table 202B in a modification. 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 apparatus 1 wraps the article 3 by covering the article 3 (see FIG. 15 and the like) 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 diagonal lower side, and the right diagonal upper side in FIG. 1 are referred to as the upper side, the lower side, the right side, and the left side of the packaging device 1, respectively. 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” (see FIG. 15).

  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 second transport units 61B and 62B push the pedestal 2 upstream or downstream.

  The motor 222 (see FIG. 12) drives the pulleys 52B and 53B to rotate. 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. 12) 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 connecting 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. Feed 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 length in the left-right direction of the feeding rollers 654A and 654B is substantially the same as the width of the film 24. The feeding roller 654B is connected to the second pulley. The feeding roller 654A is provided on the upstream side of the feeding roller 654B, and can contact the feeding roller 654B from the upstream side.

  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 feeding roller 654B via the motor gear 670, the connection gear 652, the first pulley, the transmission belt 653, and the second pulley. When the connection gear 652 moves to the winding position, the rotational driving force of the motor 227 is not transmitted to the feeding roller 654B. Further, when the connection gear 652 moves to the extended position, the rotational driving force of the motor 227 is not transmitted to the connection gear 651.

<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 feeding 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 23B rotates counterclockwise, the film roll 22 rotates in the direction in which the film 24 is wound around the film roll 22.

  On the other hand, the rotational driving force of the motor 227 is transmitted to the feeding roller 654B in a state where the connecting gear 652 is moved to the feeding position. In accordance with the rotation of the motor 227, the feeding roller 654B rotates clockwise. When the feeding roller 654B rotates clockwise, the feeding roller 654B feeds the film 24 sandwiched between the feeding 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 and 7, 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. Each surface of the base portion 341A, the first extending portion 341B, the second extending portion 341C, and the third extending portion 341D faces 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. 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 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 FIG. 6, the base part 342A, the first extension part 342B, the second extension part 342C, and the third extension part 342D of the support member 342 are respectively the base part 341A and the first extension of the support member 341. This corresponds to the installation portion 341B, the second extension portion 341C, and the third extension portion 341D. 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 FIGS. 6 and 7, the pressing roller 30 is a gear that extends in the left-right direction. The pressing roller 30 has a hole that penetrates in the left-right direction. The shaft member 30C extends in the left-right direction through the hole. The right end of the shaft member 30C is fitted into a hole provided in the vicinity of the downstream end of the first extending portion 341B. Although not shown, the left end of the shaft member 30C fits into a hole provided in the vicinity of the downstream end of the first extending portion 342B. The pressing roller 30 is rotatable with respect to the shaft member 30C. The pressing roller 31 is a cylindrical body that extends in the left-right direction. The pressing roller 31 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 on the upstream side and the upper side of the hole in which the shaft member 30C is fitted in the first extending portion 341B. The left end of the shaft member 31C is fitted into a hole provided on the upstream side and the upper side of the hole in which the shaft member 30C is fitted in the first extending portion 342B. The pressing roller 31 is rotatable with respect to the shaft member 30C. The pressing roller 32 is a cylindrical body that extends in the left-right direction. The pressing roller 32 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 on the upstream side and the lower side with respect to the hole in which the shaft member 31C is fitted in the first extending portion 341B. The left end of the shaft member 32C is fitted into a hole provided on the upstream side and the lower side with respect to the hole in which the shaft member 31C is fitted in the first extending portion 342B. The pressing roller 32 is rotatable with respect to the shaft member 32C. The pressing roller 33 is a cylindrical body that extends in the left-right direction. The pressing roller 33 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. The pressing roller 33 is rotatable 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 FIG. 7, 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 and upstream from the pressing rollers 30 to 32. 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. 15 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 34B (342B and the second extending portion 34C (342C) are disposed below the film roll 22. The pressing rollers 30 to 32 are disposed below the film roll 22. The roller 33 is disposed below the feed roller 654 B. The pressing roller 33 and the feed roller 654 B are arranged in the vertical direction, and the film 24 fed from the film roll 22 passes between the feed rollers 654 A and 654 B. , And contact the upstream portion of the pressing roller 33 and extend further downward, with the delivery rollers 654A and 654B sandwiching the film 24, the film 24 is provided on the downstream portion of the peripheral wall of the delivery roller 654A and the delivery roller 654A. The film 24 contacts the upstream portion of the peripheral wall of the roller 654B, and the film 24 Contacting the upstream portion of the.

  FIG. 19 shows a state in which the pressing mechanism 39 is disposed at the lowest position. In this state, the first extending portion 34 </ b> B (342 </ b> B) of the support members 342 of the pair of support members 34 is disposed below the conveyance 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 34B (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 gaps 3414 and 3424 (see FIGS. 6 and 7) are 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”. 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. 8 and 9, 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 below the conveyance path 103 (see FIG. 15). 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 extending downstream are provided at the downstream upper end 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. 9, 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. 12). 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. 8 and 9), and the pedestal guide member 71. It switches to the state (refer FIG. 10, FIG. 11) 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. 8 and 9) 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. 10 and 11) when the holding member 72 is separated from the holding portion 71B of the pedestal guide member 71 is referred to as a “separated position”.

<Heating mechanism 86>
As shown in FIG. 9, 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 and a support member 862. Each heating unit 861 has a substantially rectangular parallelepiped shape. Each heating unit 861 has a heater 861A (see FIG. 12) on its upper surface. The heater 861A is a resistance heating type heater that heats by passing an electric current. 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. 12) 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 conveyance path 103 (see FIG. 15). 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 heating unit 861 from above. On the other hand, each heating unit 861 contacts the lid member 87 from below in the process of moving from the lowest position toward the highest position. Each heating unit 861 pushes 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 heater 861A on the upper side of each heating unit 861 from above.

<Suppression mechanism 80>
The suppression mechanism 80 is provided on the downstream side of the heating mechanism 86. The suppression mechanism 80 includes a grip roller 81, a shaft member 81C, and an electromagnetic brake 82 (see FIG. 10). 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. 15). 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.

  The grip roller 81 has a hole that penetrates in the left-right direction along the center of rotation. The shaft member 81C extends in the left-right direction through the hole. 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. The grip roller 81 rotates in conjunction with the shaft member 81C when the shaft member 81C rotates.

  The electromagnetic brake 82 can apply a force that suppresses the rotation of the shaft member 81C and the grip roller 81 to the shaft member 81C. That is, the electromagnetic brake 82 can adjust the rotational torque of the shaft member 81C and the grip roller 81. The driving method of the electromagnetic brake 82 is a friction plate type. The electromagnetic brake 82 can adjust the rotational torque of the shaft member 81C and the grip roller 81 in accordance with the energized current. Needless to say, the drive system of the electromagnetic brake 82 is not limited to the friction plate system, and may be another drive system. For example, other driving methods that can be taken as the electromagnetic brake 82 include a meshing type, a gap type (powder type, hysteresis type, induction type) and the like.

  10 and 11 show a state when the pressing mechanism 39 moves to the lowest position. 81 C of shaft members are arrange | positioned below the 1st extension part 341B of the support member 341 of the state arrange | positioned at the lowest position. The grip roller 81 is close to the pressing roller 30 of the pressing mechanism 39 in the state of being disposed at the lowest position. In this state, the gear of the grip roller 81 and the gear of the pressing roller 30 are fitted. For example, when the electromagnetic brake 82 is energized in this state, rotational torque having a magnitude corresponding to the energized current value acts on the grip roller 81 and the pressing roller 30.

<Cutting part 77>
As shown in FIGS. 8 and 9, 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. 9, 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 FIG. 11, 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.

<Film moving mechanism 25>
As shown in FIG. 9, 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. Each surface 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 suppression mechanism 80. The motor 224 fixed to the support plate 29 is coupled 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 coupling gear 28. The connection gear 28 can rotate the holding members 261 and 262 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 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. Movement between the end of the second part 261B opposite to the side to which the first part 261A is connected and the end of the second part 262B opposite to the side to which the first part 262A is connected A member 27 is installed. The moving member 27 has an elongated rod shape. Hereinafter, the holding members 261 and 262 are collectively referred to as “holding member 26”.

  8 and 9 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 from the upper ends of the first portions 261A and 262A to the upstream side through the grip roller 81, the guide rail 74, and 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. 8 and 9 is referred to as “position before retraction”.

  10 and 11 show a state in which the holding member 26 is rotated counterclockwise in accordance with 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. 10 and 11 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. 8 and 9) to the post-retraction position (see FIGS. 10 and 11). 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. 12) 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 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, sensors 58 and 205, an operation unit 206, a display unit 207, an electromagnetic brake 82, 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 a program for various processes to be described later executed by the CPU 201, a table 202A (see FIG. 13) to be described later, and the like.

  The packaging device 1 includes drive units 211 to 217, motors 221 to 227, and an encoder 232. 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 CPU 201 is electrically connected to the flash memory 202, RAM 203, sensors 58 and 205, operation unit 206, display unit 207, electromagnetic brake 82, solenoid 16 </ b> C, heater 861 </ b> A, driving units 211 to 217, and encoder 232. Drive units 211 to 217 are electrically connected to motors 221 to 227, respectively.

<Table 202A>
The table 202A will be described with reference to FIG. The table 202A stores coefficients necessary for calculating loads (first load and second load) applied to the film 24 by the grip roller 81. The coefficient corresponding to the first load (hereinafter referred to as “first coefficient”) is the type of film 24 (“Type-A” and “Type-B”) and the width of the film 24 (“W1”, “W2”, “W3”). )) And the tension (“p1”, “p2”, “p3”, “p4”, “p5”) of the film 24 (“AW1p1”, “AW1p2”...). In FIG. 13, the widths W1 to W3 of the film 24 satisfy the relationship of W1>W2> W3. The tensions p1 to p5 of the film 24 satisfy the relationship of p1 <p2 <p3 <p4 <p5. As a coefficient corresponding to the second load (hereinafter referred to as “second coefficient”), “k” is stored regardless of the type, width, and tension of the film 24.

  The coefficients stored in the table 202A are applied to a predetermined first calculation formula that can calculate the load. The CPU 201 calculates the first load corresponding to the type, width, and tension of the film 24 by applying the first coefficient of the table 202A to the first calculation formula. The CPU 201 calculates the second load by applying the second coefficient of the table 202A to the first calculation formula.

  When the first load is calculated based on the coefficients stored in the table 202A, the larger the film 24, the greater the load. Specifically, for example, the first calculated based on the type “Type-A” of the film 24 and the first coefficients “AW1p1”, “AW2p1”, and “AW3p1” associated with the tension “p1” of the film 24. The loads are expressed as N (AW1p1), N (AW2p1), and N (AW3p1), respectively. In this case, a relationship of N (AW1p1)> N (AW2p1)> N (AW3p1) is established. As described above, when the type of the film 24 and the tension of the film 24 are common, the magnitude of the first load calculated based on the first coefficient of the table 202A increases as the width of the film 24 increases.

  The second load calculated based on the second coefficient stored in the table 202A is always calculated based on the first coefficient even when the type, width, and tension of the film 24 change. It becomes larger than 1 load.

<Packaging processing>
With reference to FIGS. 14-23, the packaging process (refer FIG. 14) performed by CPU201 of the packaging apparatus 1 is demonstrated. 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. 15 to 23 are sectional views taken along the line AA in FIG.

  As shown in FIG. 14, the CPU 201 initializes the state of the packaging device 1 (S1). 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. 15). The CPU 201 drives the motor 222 by controlling the drive unit 212 to rotate the belts 511 and 512 (see FIG. 15) of the transport mechanism 50. When the sensor 205 (see FIG. 12) detects the reflecting plate, the CPU 201 controls the driving unit 212 to stop driving the motor 222. As a result, the conveying unit 60 protrudes upward from the receiving surface 12A (see FIG. 3) of the cradle 12 (see FIG. 15). 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. The heater 861A of each heating unit 861 is separated downward from the conveyance path 103 (see FIG. 15). 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. 15). 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 spaced downward with respect to the holding portion 71 </ b> B 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 stops energization to heater 861A.

  The user pulls the film 24 downward from the film roll 22. The user sandwiches the film 24 from both sides in the transport direction with the feeding rollers 654A and 654B. The user passes the film 24 on the upstream side of the pressing roller 33. The user places the leading end of the film 24 below the transport path 103 (see FIG. 15) and downstream of the holding portion 71B of the pedestal guide member 71 (see FIG. 15). The user places the pedestal 2 on the cradle 12 (see FIG. 15). 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. 15).

  The user performs an input operation for selecting the type (“Type-A” or “Type-B”) of the film 24 on the operation unit 206. The CPU 201 acquires the selected type based on the input operation on the operation unit 206 (S3). The user performs an input operation for selecting the width of the film 24 (any one of “W1”, “W2”, and “W3”) on the operation unit 206. The CPU 201 acquires the selected width based on the input operation on the operation unit 206 (S5). The user performs an input operation for selecting the tension of the film 24 (any one of “p1” to “p5”) on the operation unit 206. The CPU 201 acquires the selected tension based on the input operation on the operation unit 206 (S7). The CPU 201 specifies a first coefficient associated with the acquired type, width, and tension in the table 202A (see FIG. 13). The CPU 201 determines the first load by applying the specified first coefficient to the first calculation formula. In addition, the CPU 201 determines the second load by applying the second coefficient of the table 202A to the first calculation formula (S9). The CPU 201 stores the determined first load and second load in the RAM 203. CPU201 advances processing to S9.

  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. 15). 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. The film 24 and the transport path 103 intersect at the front end portion of the film 24. The film 24 extends in the vertical direction.

  The CPU 201 determines whether an instruction to start packaging has been input (S11). CPU201 returns a process to S11, when the instruction | indication of a packaging start is not input (S11: NO). When the user inputs a packaging start instruction via the operation unit 206, the CPU 201 determines that a packaging start instruction is input (S11: YES). The CPU 201 drives the solenoid 16C to move the connecting gear 652 (see FIG. 5) to the extended position (S13). The CPU 201 controls the drive unit 217 to rotate the motor 227. The feeding roller 654B rotates according to the rotation of the motor 227. The film 24 is forcibly fed from the film roll 22 by the feeding rollers 654A and 654B (see FIG. 5) (S15, arrow 171 and FIG. 15). The CPU 201 continuously feeds the film 24 by the feeding rollers 654A and 654B until the connecting gear 652 is moved to the winding position by the process of S37 described later. For this reason, the film 24 is loosened.

  The CPU 201 controls the drive unit 212. The CPU 201 rotates the motor 222 in the forward direction. The belts 511 and 512 rotate in the forward direction (the direction of the arrow 181 in FIG. 15). The transport unit 60 transports the base 2 from the upstream side to the downstream side along the transport path 103 (S17). 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. 16). The side 901 of the first plate-like portion 905 of the base 2 pushes the film 24 to the downstream side. The side 901 of the first plate-like portion 905 of the base 2 approaches the moving path 104 from the upstream side and passes above the five heating units 861 (see FIG. 16). 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. 17, the film 24 extending from the film roll 22 is bent by the pressing roller 33 and extends downstream, and 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. 14, the CPU 201 starts transporting the pedestal 2 to the downstream side in the process of S <b> 17, and then starts transporting the pedestal 2 in accordance with the pulse signal output from the encoder 232. The number of rotations of the motor 222 is specified. The CPU 201 determines whether or not the side 901 of the first plate-like portion 905 of the pedestal 2 has moved to the downstream side by a predetermined distance with respect to the upper position of the five heating units 861 in the state of being arranged at the top. Judgment is made based on the identified rotational speed of the motor 222. When the CPU 201 determines that the side 901 of the first plate-like portion 905 of the pedestal 2 has moved a predetermined distance downstream from the upper position of the five heating units 861, the CPU 201 controls the driving portion 212 to control the motor 222. The drive is stopped and the conveyance to the downstream side of the base 2 is stopped (S19).

  CPU201 controls actuator 213, drives motor 223, and raises five heating units 861 (S21). 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. 17, when the five heating units 861 rise to the uppermost position (arrow 183), the upper sides of the five heating units 861 are close to the transport path 103 from below and are slightly lower than the transport path 103. Is placed on the upper side. The side 901 of the first plate-like portion 905 of the pedestal 2 has moved a predetermined distance downstream from the upper position of the five heating units 861, and a film is placed on the lower surface of the first plate-like portion 905 of the pedestal 2. 24 wraps around. Therefore, with the five heating units 861 disposed at the top, the upper side of the five heating units 861 is in a state of sandwiching the film 24 between the lower surface of the first plate-like portion 905 of the base 2.

  As shown in FIG. 14, the CPU 201 heats the heater 861A (S23). The heater 861A heats and melts the leading end portion of the film 24. The front end portion of the melted film 24 is welded to the pedestal 2 (S23). The CPU 201 stops the heating of the heater 861A after a predetermined time has elapsed since the heating of the heater 861A was started.

  The CPU 201 controls the drive unit 213 to drive the motor 223 to lower the five heating units 861 (S25, arrow 184 (see FIG. 18)). The upper side of each heating unit 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 and stop the lowering of the five heating units 861.

  CPU201 controls actuator 216, drives motor 226, and moves a pair of support members 78 to a separation position (S27). As shown in FIG. 18, when the pair of support members 78 rotate in the direction of the arrow 185, the holding member 72 is separated downward from the holding portion 71 </ b> B 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 of the film 24 in a sandwiched state.

  As shown in FIG. 14, the CPU 201 controls the drive unit 212 to drive the motor 222. The CPU 201 rotates the motor 222 in the forward direction so that the belts 511 and 512 rotate in the forward direction. The pedestal 2 is conveyed downstream (S29, arrow 186 (see FIG. 18)). The leading end portion of the film 24 is in a state of being bonded to the base 2 by the process of S23. For this reason, according to the movement to the downstream side of the base 2, the front-end | tip part of the film 24 moves to a 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 of the film 24 from below. For this reason, when the leading end portion of the film 24 moves along with the movement of the pedestal 2, the leading end portion of the film 24 extends to the downstream side along the conveyance path 103.

  As shown in FIG. 18, the transport unit 60 moves onto the cradle 13, and the downstream side of the base 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.

  The CPU 201 specifies the number of rotations of the motor 222 after starting the conveyance of the pedestal 2 according to the pulse signal output from the encoder 232 after starting the conveyance to the downstream side of the pedestal 2 by the process of S29. To do. The CPU 201 determines whether or not the side 902 of the first plate-like portion 905 of the pedestal 2 has moved downstream by a predetermined distance with respect to the intersection position 105 based on the identified number of rotations of the motor 222. When the CPU 201 determines that the side 902 of the first plate-like portion 905 of the base 2 has moved downstream by a predetermined distance with respect to the intersection position 105, the CPU 201 controls the driving unit 212 to stop driving the motor 222. Then, the conveyance to the downstream side of the base 2 is stopped (S31).

  The CPU 201 controls the driving unit 214 to drive the motor 224 to move the film moving mechanism 25 from the pre-retraction position to the post-retraction position (S33). The moving member 27 of the film moving mechanism 25 temporarily moves from the lower side of the holding portion 71B 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 and FIG. 18). The moving member 27 moves the leading end portion of the film 24 to the lower side of the conveying path 103 and the downstream side of the moving path 104 in the process of moving from the upper side to the lower side of the conveying path 103.

  The CPU 201 controls the drive unit 211 to drive the motor 221 to move the pressing mechanism 39 to the lowest position (S35). The pressing roller 30 moves from the highest level to the lowest level along the movement path 104. In the process of movement, the pressing rollers 30 and 32 come into contact with the film 24 disposed below from the upper side and push the film 24 downward (see arrow 188, FIG. 19). 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. 19, the gear of the grip roller 81 is engaged with the gear of the pressing roller 30 in a state where the pressing mechanism 39 is disposed at the lowest position. 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. 14, the CPU 201 drives the solenoid 16C to move the connecting gear 652 (see FIG. 5) to the winding position. In the initialization process of S1, energization to the electromagnetic brake 82 is stopped. For this reason, the grip roller 81 and the pressing roller 30 are in a rotatable state. For this reason, according to rotation of the motor 227, the film 24 is wound up on the film roll 22 (S37, arrow 172, refer FIG. 19). 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. After a predetermined time, the CPU 201 controls the driving unit 217 to stop the rotation of the motor 227. Thereby, the winding of the film 24 onto the film roll 22 is stopped (S39). The CPU 201 drives the solenoid 16C to move the connecting gear 652 (see FIG. 5) to the extended position (S41). As a result, the motor 227 is connected to the feeding roller 654B via the motor gear 670, the connection gear 652, the first pulley, the transmission belt 653, and the second pulley. In other words, the rotational driving force of the motor 227 can be transmitted to the connecting gear 651. On the other hand, the motor 227 and the connection gear 651 are not connected. That is, the rotational driving force of the motor 227 is not transmitted to the feeding roller 654B.

  The CPU 201 reads the first load determined by the process of S9 from the RAM 203. The CPU 201 specifies the current value of the current to be supplied to the electromagnetic brake 82 by applying the first load read in the predetermined second calculation formula. Hereinafter, the current value specified based on the first load is referred to as a “first current value”. The CPU 201 energizes the electromagnetic brake 82 with the current having the specified first current value. In this case, rotational torque (hereinafter referred to as “first rotational torque”) corresponding to the first current value acts on the grip roller 81 connected to the electromagnetic brake 82 (S43).

  The CPU 201 rotates the motor 222 in the reverse direction so that the belts 511 and 512 rotate in the reverse direction (S45). The pedestal 2 moves from the downstream side to the upstream side (see arrow 189, FIG. 20). 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 sides of the side 902 of the first plate-like portion 905 of the pedestal 2 are gaps 3414 and 3424 between the first extending portion 34B (342B) and the second extending portion 34C (342C) of the pressing mechanism 39. (See FIG. 6 etc.) from the downstream side. The second extending portion 34C (342C) presses the first plate-like portion 905 of the pedestal 2 from the upper side 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. The side 902 of the first plate-like portion 905 of the pedestal 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 gaps 3414 and 3424 between the first extending portion 34B (342B) and the second extending portion 34C (342C) (see FIG. 6 and the like). The pedestal 2 is guided upstream along the line. 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 pedestal 2 passes above the five heating units 861 and moves upstream.

  In the process in which the pedestal 2 moves to the upstream side, the film 24 wraps around the lower portion of the upstream side of the first plate-like portion 905 of the pedestal 2. The film 24 that wraps around the lower side of the base 2 is insufficient. For this reason, in order to make up for the shortage of the film 24, the film 24 will move in the moving direction (the direction of the arrow 173 (see FIG. 21) when it is unwound from the film roll 22; hereinafter referred to as the “feeding direction”). And However, the film 24 is sandwiched between the grip roller 81 and the pressing roller 30. Further, the first rotational torque is applied to the grip roller 81 by the process of S43. For this reason, the movement of the film 24 in the feeding direction is suppressed by the grip roller 81 and the pressing roller 30. Further, the first load acts on the film 24 from the grip roller 81 in the direction opposite to the feeding direction (the direction of the arrow 174 (see FIGS. 20 and 21), hereinafter referred to as “opposite direction”). To do. As a result, tension is applied to the film 24, and the film 24 adheres to the article 3 (see FIG. 20).

  In accordance with the pulse signal output from the encoder 232, the CPU 201 specifies the number of rotations of the motor 222 after starting the conveyance to the upstream side of the base 2 by the process of S45. The CPU 201 determines whether or not the pedestal 2 has moved upstream by a predetermined distance with respect to the upper positions of the five heating units 861 based on the identified rotational speed. When the CPU 201 determines that the pedestal 2 has moved a predetermined distance 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 and stop the conveyance of the pedestal 2. (S47).

  The CPU 201 reads out the second load determined by the process of S9 from the RAM 203. The CPU 201 specifies the current value of the current to be supplied to the electromagnetic brake 82 by applying the second load read in the second calculation formula. Hereinafter, the current value specified based on the second load is referred to as a “second current value”. The CPU 201 energizes the electromagnetic brake 82 with the current having the specified second current value. In this case, a rotational torque corresponding to the second current value (hereinafter referred to as “second rotational torque”) acts on the grip roller 81 connected to the electromagnetic brake 82 (S49). The second rotational torque is larger than the first rotational torque that is the rotational torque when the current having the first current value is energized to the electromagnetic brake 82. A second load acts on the film 24 from the grip roller 81 in the opposite direction. That is, the load in the opposite direction acting on the film 24 is changed from the first load to the second load. Since the second load is larger than the first load, the movement of the film 24 in the feeding direction is suppressed more strongly than the state where the first load is acting on the film 24. The film 24 cannot move with respect to the grip roller 81 and the pressing roller 30.

  The CPU 201 controls the driving 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. 10). 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 gear of the grip roller 81 and the gear of the pressing roller 30 and between the pressing rollers 30 and 32. Is cut by the blade portion 771 (S51). The cutting part 77 cuts off the part of the film 24 that covers the first plate-like part 905 and the article 3 of the base 2 from the film roll 22 side.

  After the film 24 is cut, the portion of the film 24 cut off from the film roll 22 side tends to come off from the portion sandwiched between the grip roller 81 and the pressing roller 30 due to the tension acting on the film 24. However, the gear of the grip roller 81 and the gear of the pressing roller 30 are fitted to sandwich the film 24 therebetween. The electromagnetic brake 82 applies a second rotational torque, which is greater than the first rotational torque, to the grip roller 81. For this reason, the film 24 does not come off from the portion sandwiched between the grip roller 81 and the pressing roller 30.

  On the other hand, the cut end of the film 24 extending from the film roll 22 hangs downstream of the pedestal guide member 71. 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 (S53). As shown in FIG. 22, the pair of support members 78 swings in the direction of the arrow 190. The holding member 72 comes close to the holding portion 71 </ b> B of the pedestal guide member 71. An end portion of the film 24 cut by the cutting portion 77 is sandwiched between the holding portion 71 </ b> B and the holding member 72 of the base guide member 71.

  As shown in FIG. 14, the CPU 201 controls the drive unit 213 to drive the motor 223 and raise the five heating units 861 (S55). 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. 22, the top surfaces of the five heating units 861 approach the transport path 103 from below in a state where the five heating units 861 are raised to the top (arrow 191). By arranging the five heating units 861 at the uppermost position, a portion of the film 24 that is close to the welded portion by the process of S13 (hereinafter referred to as a “first portion”) and a cut portion of the process of S37 are close to each other. A portion to be performed (hereinafter referred to as “second portion”) is sandwiched between the base 2 and the five heating units 861.

  As shown in FIG. 14, the CPU 201 heats the heater 861A (S57). The heater 861A heats and melts the second portion of the film 24. The second part of the melted film 24 is welded to the first part of the film 24. The CPU 201 stops the heating of the heater 861A after a predetermined time has elapsed since the heating of the heater 861A was started. The CPU 201 controls the drive unit 213 to drive the motor 223 and lower the five heating units 861 (S59, arrow 192 (see FIG. 23)). The upper surface of each heating unit 861 is separated from the conveyance path 103. The CPU 201 controls the driving unit 213 to stop the rotation of the motor 223.

  The CPU 201 stops energization of the electromagnetic brake 82. As a result, the grip roller 81 becomes rotatable (S61). The CPU 201 controls the driving unit 212 to drive the motor 222. The CPU 201 rotates the motor 222 in the forward direction so that the belts 511 and 512 rotate in the forward direction. The pedestal 2 is conveyed downstream (S63, arrow 193 (see FIG. 23)). The pedestal 2 and the article 3 that have been packaged are conveyed downstream. 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 (S65). The pressing roller 30 moves from the lowest position to the highest position along the movement path 104. 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 pre-retraction position (S67). The CPU 201 ends the packaging process.

<Main functions and effects of this embodiment>
As described above, the CPU 201 of the packaging device 1 moves the base 2 and the article 3 to the downstream side (S17, S29), and guides the film 24 to the upper side of the article 3 by the pressing roller 30 (S35). The periphery of the article 3 is covered with the film 24. Next, the CPU 201 brings the film 24 into close contact with the article 3 by moving the pedestal 2 and the article 3 to the upstream side (S45). Here, the CPU 201 sandwiches the film 24 between the grip roller 81 and the pressing roller 30 of the suppression mechanism 80 during the period in which the pedestal 2 and the article 3 are moved upstream, and the electromagnetic brake 82 first rotates the grip roller 81. Apply torque. Thereby, the first load acts on the film 24 in the opposite direction, and the film 24 is suppressed from moving in the feeding direction when the pedestal 2 moves upstream. In this case, when the base 2 and the article 3 move to the upstream side, the supply of the film 24 that is insufficient from the film roll 22 is limited, so that the first load does not act on the film 24. A stronger tension is applied. For this reason, the CPU 201 can wrap the film 24 in close contact with the article 3.

  In the above, the CPU 201 suppresses the movement of the film 24 in the feeding direction by bringing the grip roller 81 of the suppression mechanism 80 into contact with the film 24 fed out from the film roll 22. In this case, the packaging device 1 can apply the first load to the film 24 regardless of the remaining amount of the film 24 remaining on the film roll 22. On the other hand, when a load is applied to the film 24 by rotating the film roll 22 as in the prior art, the relationship between the rotational torque of the film roll 22 and the load applied to the film 24 depends on the diameter of the film roll 22. Change. In this case, even when a constant rotational torque is applied to the film roll 22, the load applied to the film 24 changes, so that a constant tension cannot be continuously applied to the film 24. On the other hand, in the packaging device 1, the relationship between the rotational torque of the grip roller 81 and the load acting on the film 24 is constant regardless of the diameter of the film roll 22. For this reason, the CPU 201 does not need to perform complicated motor control according to the remaining amount of the film 24. Therefore, the packaging device 1 can execute the packaging by applying a tension appropriate to the packaging of the article 3 to the film 24 and performing the packaging.

  The suppression mechanism 80 brings the grip roller 81 into contact with the side opposite to the film roll 22 side of the portion of the film 24 that is cut by the blade portion 771 of the cutting portion 77, and suppresses movement of the film 24 in the feeding direction. In this case, the suppressing mechanism 80 can apply a load in the opposite direction to the film 24 cut from the film roll 22 by the cutting portion 77. Therefore, when the film 24 is cut by the cutting unit 77, the packaging device 1 can maintain a state in which tension is applied to the film 24 that covers the article 3.

  The CPU 201 energizes the electromagnetic brake 82 of the suppression mechanism 80 with the second current value before the film 24 is cut by the cutting unit 77 (S43). Accordingly, when the film 24 is cut, the second load in the opposite direction is applied to the film 24, and the movement of the film 24 in the feeding direction is prohibited. CPU201 welds the cut | disconnected edge part among the films 24 in the state which the 2nd load of the opposite direction acted on the film 24 (S57). Thus, the CPU 201 moves the film 24 in the feeding direction with respect to the grip roller 81 after the film 24 is separated from the film roll 22 by the cutting unit 77 and before the film 24 is welded to the base 2. Can be prohibited. For this reason, the packaging apparatus 1 can weld the film 24 in a state where tension is applied to the film 24 in a state of covering the article 3, and wrap the article 3 with the film 24.

  Even when the load acting on the film 24 is common, the tension applied to the film 24 varies depending on the type and width of the film. As an example, even when the load acting on the film 24 is common, the greater the width of the film 24, the smaller the tension applied to the film. In contrast, the CPU 201 acquires the type, width, and tension of the film 24 selected by the user (S3, S5, S7). CPU201 specifies the 1st coefficient according to the acquired kind, width, and tension based on table 202A, and determines the 1st load (S9). In the process of transporting the base 2 to the upstream side, the CPU 201 causes the first load torque to act on the grip roller 81 by applying a first rotational torque corresponding to the first load to the film 24. Here, when the first coefficient is specified based on the table 202A, the larger the load of the film 24, the larger the first load is determined. For this reason, the CPU 201 can apply a constant tension to the film 24 even when the width of the film 24 changes. Similarly, since the CPU 201 can specify the first coefficient in accordance with the type of the film 24, even when the type of the film 24 changes, a constant tension can be applied to the film. Further, the CPU 201 can specify the first coefficient according to the selected tension. For this reason, CPU201 can change the tension given to film 24 according to the selected tension by applying the 1st load according to the selected tension to film 24.

  The suppression mechanism 80 includes a grip roller 81 and an electromagnetic brake 82. The grip roller 81 sandwiches the film 24 between the pressing roller 30 and the grip roller 81 moved to the lower position. The electromagnetic brake 82 causes rotational torque to act on the grip roller 81. For this reason, the packaging device 1 causes the first load in the opposite direction to act on the film 24 by suppressing the movement of the film 24 in the feeding direction by the grip roller 81 when the base 2 and the article 3 move upstream. Can be made. The electromagnetic brake 82 can easily change the magnitude of the load applied to the film 24 by adjusting the rotational torque of the grip roller 81.

  The motor 227 is connected to the film roll 22 via the connection gear 651 and the film gear 23B in a state where the connection gear 652 is disposed at the winding position. In this state, when the film roll 22 rotates in the direction in which the film 24 is unwound from the film roll 22, the motor 227 rotates in the direction opposite to the excitation direction. For this reason, the motor 227 may obstruct the rotation of the film roll 22 even if it tries to unwind the film 24 from the film roll 22 in order to make up for the film 24 that is insufficient in response to the pedestal 2 being conveyed upstream. . Further, when the motor 227 rotates in the direction opposite to the excitation direction, the motor 227 may generate heat. For this reason, when the film 24 is unwound from the film roll 22 in response to the pedestal 2 being conveyed upstream, it is preferable that the connecting gear 652 is not disposed at the winding position.

  On the other hand, the CPU 201 moves the connecting gear 652 to the extended position (S41) before conveying the base 2 to the upstream side (S45). When the connection gear 652 is disposed at the extended position, the motor 227 is not connected to the film roll 22. Thus, the packaging device 1 can prevent the motor 227 from inhibiting the feeding of the film 24 from the film roll 22 in response to the movement of the pedestal 2 to the upstream side. The motor 227 is connected to the supply roller 654B via the motor gear 670, the connection gear 652, the first pulley, the transmission belt 653, and the second pulley in a state where the connection gear 652 has moved to the supply position. When the film 24 is unwound from the film roll 22 as the pedestal 2 is conveyed upstream, the unwinding roller 654B rotates, and the motor 227 also rotates according to the rotation of the unwinding roller 654B. However, the rotation direction of the motor 227 coincides with the excitation direction. For this reason, the motor 227 does not hinder the rotation of the feeding roller 654B and does not generate heat. .

<Modification>
With reference to FIG. 24, the table 202B in the modification will be described. The difference between the table 202B and the table 202A is that the start timing t is stored instead of the first coefficient. The start timing indicates time. The start timing t becomes a shorter value as the tension increases. Specifically, for example, the start timing associated with the type “Type-A” of the film 24 and the width “W1” of the film 24 is tAW1p1 (tension: p1), tAW1p2 (tension: p2), tAW1p3 ( Tension: p3), tAW1p4 (tension: p4), tAW1p5 (tension: p5) (where p1 <p2 <p3 <p4 <p5) satisfies the relationship of tAW1p1>tAW1p2>tAW1p3>tAW1p4> tAW1p5.

  With reference to FIG. 25, the packaging process in a modification is demonstrated. The same processing as the packaging processing (see FIG. 14) in the above embodiment is denoted by the same reference numerals, and description thereof is omitted. The CPU 201 acquires the selected type, width, and tension based on the input operation on the operation unit 206 (S3, S5, S7). The CPU 201 specifies the start timing t associated with the acquired type, width, and tension in the table 202B (see FIG. 24). In addition, the CPU 201 determines the second load by applying the second coefficient of the table 202B to the first calculation formula (S9). The CPU 201 stores the start timing and the second load in the RAM 203.

  Unlike the above embodiment, the CPU 201 does not energize the electromagnetic brake 82 immediately after the connecting gear 652 is moved to the extended position by the process of S41. The CPU 201 rotates the motor 222 in the reverse direction so that the belts 511 and 512 rotate in the reverse direction (S45). Thereby, the base 2 moves from the downstream side to the upstream side. The CPU 201 reads the start timing and the second load from the RAM 203. CPU201 judges whether the elapsed time after starting conveyance to the upper stream side of base 2 by processing of S45 is larger than start timing (S461). When the CPU 201 determines that the elapsed time is equal to or less than the start timing (S461: NO), the CPU 201 returns the process to S461. If the CPU 201 determines that the elapsed time is greater than the start timing (S461: YES), the CPU 201 advances the process to S462.

  The CPU 201 specifies the second current value of the current to be supplied to the electromagnetic brake 82 by applying the read second load to the second calculation formula. The CPU 201 energizes the electromagnetic brake 82 with the current having the specified second current value (S462). A second load acts on the film 24 from the grip roller 81 in the opposite direction. Movement of the film 24 in the feeding direction is prohibited by the grip roller 81 and the pressing roller 30.

  When the CPU 201 determines that the pedestal 2 has moved upstream by a predetermined distance with respect to the upper position of the five heating units 861, the CPU 201 controls the driving unit 212 to stop driving the motor 222 and transport the pedestal 2. Stop (S47). The CPU 201 cuts the film roll 22 side with the blade portion 771 from the portion sandwiched between the gear of the grip roller 81 and the gear of the pressing roller 30 in the film 24 (S51). 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.

  As described above, in the modified example, the CPU 201 starts the movement of the pedestal 2 to the upstream side (S45), and then starts energizing the electromagnetic brake 82 to start suppressing the rotation of the grip roller 81 (S462). ) Is changed according to the type, width and tension of the input film 24 (S461). Note that the amount of the film 24 fed out from the film roll 22 in accordance with the movement of the pedestal 2 changes in accordance with the timing at which the movement of the film 24 by the grip roller 81 starts to be suppressed. The later the timing at which the movement of the film 24 starts to be suppressed, the smaller the amount of the film 24 that is fed out from the film roll 22. In addition, the magnitude | size of the tension | tensile_strength provided to the film 24 becomes large, so that the quantity of the film 24 drawn | fed out from the film roll 22 is small. Therefore, the CPU 201 can apply a tension corresponding to the type, width, and tension of the film 24 to the film 24 by controlling the timing for starting the suppression of the movement of the film 24.

  In the above modification, the user may perform only an input operation for selecting the tension of the film 24. The CPU 201 specifies the start timing t according to the preset type of the film 24 (for example, “Type-A”), the width of the film 24 (for example, “W1”), and the selected tension. May be. The CPU 201 may control the timing for starting energization of the electromagnetic brake 82 in accordance with the specified start timing t.

<Other variations>
The present invention is not limited to the above embodiment, and various modifications can be made. In the above, the grip roller 81 of the suppression mechanism 80 sandwiched the portion of the film 24 opposite to the film roll 22 side from the portion cut by the blade portion 771 of the cutting portion 77 between the pressing roller 30. . On the other hand, the suppression mechanism 80 contacts the film 24 on the film roll 22 side with respect to the portion cut by the blade portion 771 of the cutting portion 77, and the film 24 responds to the upstream movement of the base 2 and the article 3. A load may be applied to the. In this case, the packaging device 1 has a regulating unit that regulates the movement of the film 24 in the feeding direction when the film 24 is cut by the blade 771 of the cutting unit 77, separately from the suppression mechanism 80. May be. For example, the restricting unit may restrict the movement of the film 24 by sandwiching the film 24 with the pressing roller 30. In this case, it is not necessary to change the load from the first load to the second load by performing the process of S49 following the process of S43. That is, the CPU 201 only needs to apply the first load in the opposite direction by the process of S43, and the process of S49 may not be performed.

  The CPU 201 selects either “Type-A” or “Type-B” selected as the type of the film 24, “W1”, “W2”, “W3” selected as the width of the film 24, and the tension of the film 24. Any one of “p1” to “p5” selected as is acquired (S3, S5, S7). The CPU 201 specifies the first coefficient by referring to the table 202A based on the acquired type, width, and tension. The CPU 201 determines the first load by applying the identified first coefficient to the first calculation formula (S9). The CPU 201 specifies the first current value to be passed through the electromagnetic brake 82 by applying the determined first load to the second calculation formula. In contrast, the CPU 201 may acquire one or two of the type, width, and tension of the film 24 and calculate the first load based on the acquired parameters. For example, the user may input a specific value of at least one of the width of the film 24 and the tension via the operation unit 206. The CPU 201 may calculate the first load by applying a value input to a predetermined calculation formula. For example, the user may input a specific value of the first load via the operation unit 206. The CPU 201 may calculate the first current value by applying the input value to the second calculation formula. When the CPU 201 identifies the first coefficient based on the table 202A, the CPU 201 may directly calculate the first current value based on the identified first coefficient. In this case, the CPU 201 does not have to calculate the first load.

  The grip roller 81 and the pressing roller 30 may not be gears, and for example, both may be columnar members. Instead of the grip roller 81, a restraining member that can move between a position close to the pressing roller 30 disposed at the lower position and a position separated from the pressing roller 30 may be provided. The suppressing member may move the film 24 between the pressing roller 30 by moving to a position close to the pressing roller 30. In this state, the load in the opposite direction may be applied to the film 24 by transporting the base 2 to the upstream side. Moreover, the magnitude | size of the load made to act on the film 24 may be adjusted by adjusting the intensity | strength when a suppression member is pressed on the pressing roller 30 side.

  A mechanism for applying a load that suppresses rotation to the grip roller 81 is not limited to the electromagnetic brake 82. For example, a load that suppresses the rotation of the grip roller 81 may be applied to the shaft member 81C by a clutch that can be separated from the shaft member 81C. The CPU 201 starts the winding of the film 24 onto the film roll 22 by the process of S37, ends the winding of the film 24 by the process of S39, and then moves the connecting gear 652 to the feeding position by the process of S41. It was. On the other hand, the CPU 201 may maintain the connection gear 652 at the winding position.

<Others>
The grip roller 81 is an example of the “contact portion” in the present invention. The CPU 201 that performs the processes of S17 and S29 is an example of the “first moving unit” in the present invention. The CPU 201 that performs the process of S35 is an example of the “second moving unit” in the present invention. The CPU 201 that performs the process of S45 is an example of the “third moving unit” in the present invention. The CPU 201 that performs the processes of S43 and S45 is an example of the “first load means” in the present invention. The CPU 201 that performs the process of S51 is an example of the “cutting unit” in the present invention. The CPU 201 that performs the process of S49 is an example of the “second load means” in the present invention. The CPU 201 that performs the process of S57 is an example of the “welding means” in the present invention. The CPU 201 that performs the process of S5 is an example of the “first acquisition unit” in the present invention. The CPU 201 that performs the process of S3 is an example of the “second acquisition unit” in the present invention. The CPU 201 that performs the process of S7 is an example of the “third acquisition unit” in the present invention. The CPU 201 that performs the process of S9 is an example of the “determination unit” in the present invention. The connection gear 652 is an example of the “switching mechanism” in the present invention. The state where the connecting gear 652 has moved to the winding position is an example of the “first state” in the present invention. The state where the connecting gear 652 has moved to the extended position is an example of the “second state” in the present invention. The process of S37 is an example of the “winding unit” in the present invention. The CPU 201 that performs the process of S41 is an example of the “switching unit” in the present invention.

1: Packaging device 2: Pedestal 3: Article 22: Film roll 24: Film 39: Pressing mechanism 50: Conveying mechanism 77: Cutting unit 80: Suppression mechanism 81: Grip roller 82: Electromagnetic brake 103: Conveying path 104: Moving path 105 : Crossing positions 141 and 142: Mounting member 201: CPU

Claims (8)

A packaging device that wraps a pedestal and an article placed on the pedestal with a film,
A transport mechanism for transporting the pedestal on which the article is placed;
A mounting portion provided above a transport path of the pedestal transported by the transport mechanism and capable of mounting a film roll wound with the film;
The film has a contact portion capable of contacting the film fed from the film roll mounted on the mounting portion, and the film in a feeding direction which is a moving direction of the film when the film is fed from the film roll A suppression mechanism that suppresses movement of
A pressing roller that pushes the film in a state of being fed out of the film roll downward from above by moving from an upper position above the transport path to a lower position below;
The upstream end portion of the pedestal arranged on the upstream side in the conveyance direction of the pedestal with respect to the intersection position where the conveyance path and the movement path of the pressing roller intersect each other is more than the pedestal. First moving means for moving the pedestal to the downstream side by the transport mechanism until it is arranged downstream of the transport direction of
Second moving means for moving the pressing roller from the upper position to the lower position along the moving path after moving the pedestal by the first moving means;
Third moving means for moving the pedestal until the upstream end of the pedestal is arranged on the upstream side of the pressing roller after the pressing roller is moved by the second moving means;
The at least part of the period in which the pedestal is moved by the third moving means, the contact portion of the suppression mechanism is brought into contact with the film, and the film moves in the feeding direction according to the movement of the pedestal; First load means for applying and suppressing a first load in a direction opposite to the feeding direction;
After the movement of the pedestal by the third moving means is finished, the cutting means for cutting the film by a cutting mechanism and cutting off the part of the film that covers the article from the film roll;
First acquisition means for acquiring the width of the film ,
The packaging device according to claim 1, wherein the first loading means causes a larger load to act on the film as the width of the film obtained by the first obtaining means increases . The suppression mechanism is
The packaging device according to claim 1, wherein the contact portion is brought into contact with a side opposite to the film roll side of a portion of the film cut by the cutting mechanism. When the film is cut by the cutting means, the contact portion of the restraining mechanism is brought into contact with the film, and the movement of the film in the feeding direction is caused by applying a second load in the opposite direction. Second load means for suppressing,
Welding means for welding the cut end portion of the film in a state where the second load is applied in the opposite direction to the film by the second load means;
The packaging apparatus according to claim 2, wherein the second load is larger than the first load. Second acquisition means for acquiring the type of the film;
Determination means for determining a load corresponding to the type acquired by the second acquisition means based on information stored in a storage unit in association with a type of the film and a parameter capable of specifying the load; ,
The packaging apparatus according to any one of claims 1 to 3 , wherein the first loading means causes the load determined by the determining means to act on the film. The contact portion of the suppression mechanism has a grip roller capable of sandwiching the film between the pressing roller at the lower position,
The suppression mechanism is
By suppressing the rotation of the grip roller, packaging apparatus according to any one of claims 1 to 4, characterized in that to suppress the movement of the said feeding direction of said film. The packaging device according to claim 5 , wherein the suppression mechanism includes an electromagnetic brake capable of adjusting a rotational torque of the grip roller. A third acquisition means for acquiring a parameter indicating the tension of the film;
The first loading means changes a timing for starting suppression of movement of the film during movement of the pedestal and the article by the third moving means according to the parameter acquired by the third acquisition means. The packaging device according to claim 1. A rotation mechanism for rotating the film roll in a winding direction in which the film is wound on the film roll;
A switching mechanism capable of switching between a first state in which the rotational driving force of the rotating mechanism is transmitted to the film roll and a second state in which the rotational driving force is not transmitted to the film roll;
The switching mechanism is switched to the first state for a period from the end of the movement of the pressing roller by the second moving means to the start of the movement of the pedestal by the third moving means, and the rotating mechanism Winding means for rotating the film roll in the winding direction by:
Switching means for switching the switching mechanism to the second state after completion of rotation of the film roll by the winding means;
The packaging device according to any one of claims 1 to 7 , wherein the third moving unit moves the base in a state where the switching mechanism is switched to the second state.

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