JP2014218293A - Film cassette and cassette case - Google Patents

Abstract

A film cassette and a cassette case for preventing a film roll from rotating in reverse after the film is cut are provided. A film cassette includes a film roll, a case, a flange, and an elastic member. The film roll 22 is formed by winding a packaging film 24 around a paper tube 221. The film roll 22 extends in the axial direction. The case 25 accommodates the film roll 22 inside. The flange 27 is attached to the end of the film roll 22 in the axial direction, and rotates integrally with the film roll 22. The elastic member 28 has an elastic force. The elastic member 28 is fixed to the case 25 and abuts on the flange 27. [Selection] Figure 10

Description

  The present invention relates to a film cassette and a cassette case containing a packaging film for packaging a packaging object.

  Conventionally, a packaging apparatus for packaging a product is known. For example, the packaging machine of patent document 1 conveys a product with a conveyor, and overlaps a product with a plastic film in the conveyance process. And a packaging machine heats a plastic film with a heat seal member etc., and wraps a product with a plastic film. The plastic film is drawn out from a film roll around which the plastic film is wound, and is conveyed while being positioned by a roller on a conveyance path, and used for packaging. The plastic film is cut after packaging the product.

JP-A-1-111604

  However, when the plastic film that has been in tension is cut, the film roll that has applied tension to the plastic film may rotate in reverse. In this case, the plastic film is rewound, and setting for the next packaging may take time.

  The objective of this invention is providing the film cassette and cassette case which prevent that a film roll reversely rotates after the cutting | disconnection of a film.

  The film cassette which concerns on the 1st aspect of this invention is a film roll extended in the axial direction by which the film for packaging was wound, the storage member which accommodates the said film roll inside, The said axial direction of the said film roll A mounting member that is mounted on the end and rotates integrally with the film roll; and an elastic member that is fixed to one of the storage member and the mounting member and has elasticity that contacts the other. In this case, even if the film is cut and changed from a state in which the film is tensioned to a state in which no tension is applied, the film is caused by the frictional force between the elastic member and the mounting member or storage member with which the elastic member abuts. It is possible to prevent the roll from rotating backward. Therefore, the film is not rewound and the setting for the next packaging can be performed smoothly.

  In the film cassette, the film roll includes a cylindrical member around which the film is wound, and the elastic member is the axial direction side of the outer periphery of the cylindrical member, or the axis line on the inner side of the outer periphery. It may be located on the direction side. In this case, since the elastic member is located on the axial direction side of the outer periphery of the cylindrical member or on the axial direction side of the outer periphery, the mounting member can be held by the cylindrical member. Therefore, it can prevent that the frictional force between a mounting member or a storage member, and an elastic member falls. Therefore, it can prevent more reliably that a film roll reversely rotates.

  In the film cassette, the elastic member is in contact with the first member having elasticity fixed to the one of the mounting member and the storage member, and the other of the mounting member and the storage member, and the first member You may provide the 2nd member with smaller elastic force. In this case, the second member that contacts the mounting member or the storage member has a smaller elastic force than the first member. That is, the second member is harder than the first member. For this reason, compared with the case where a 1st member contact | abuts to a mounting member or a storage member, when ambient environments, such as temperature and humidity, change, it is between the mounting member or storage member and elastic member which an elastic member contacts. Small change in friction force. Therefore, even if the surrounding environment changes, the frictional force between the mounting member or the storage member and the elastic member can be maintained, and the reverse rotation of the film roll can be prevented.

  In the film cassette, at least a pair of the elastic members may be provided and may face each other in the axial direction with the film roll interposed therebetween. In this case, the pair of elastic members can sandwich the film roll from both ends in the axial direction of the film roll via the mounting member. Therefore, compared with the case where the elastic member is provided only on one side in the axial direction of the film roll, the frictional force between the mounting member or the storage member with which the elastic member abuts and the elastic member is stabilized. Therefore, it can prevent more reliably that a film roll reversely rotates.

  The cassette case which concerns on the 2nd aspect of this invention can be mounted | worn with the storage member which can accommodate the film roll extended in the axial direction around which the film for packaging was wound, and the end of the said axial direction of the said film roll And a mounting member that can rotate integrally with the film roll, and an elastic member that is fixed to one of the storage member and the mounting member and has elasticity that can contact the other. In this case, when a film cassette provided with a film roll is created using a cassette case, the elastic member is not cut even if the film is cut and the film is tensioned to no tension. It is possible to prevent the film roll from rotating backward due to the frictional force between the mounting member or the storage member that comes into contact with the elastic member. Therefore, the film is not rewound and the setting for the next packaging can be performed smoothly.

FIG. 3 is a perspective view of the packaging device 1 with a housing 800 attached. It is a perspective view of packaging device 1 in the state where case 800 was removed. It is a figure which shows the packaging process by a packaging process. 4 is a perspective view of the vicinity of the upper end of the side plate portion 11. FIG. 4 is a right side view of a configuration around a lever 47. FIG. It is a perspective view of the film cassette 2. FIG. It is a perspective view of the film cassette 2 in the state where the upper case 251 is removed. It is a perspective view of the film roll 22 with which the flange 27 was mounted | worn. 4 is a right side view of the film cassette 2. FIG. FIG. 10 is a cross-sectional view taken along line AA in FIG. 9. 3 is an enlarged view of an elastic member 28. FIG. 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.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. The packaging device 1 wraps the article 3 by covering the upper side of the article 3 placed on the base 9 such as a mount with a film 24 and fixing the article 3 to the base 9. The packaging apparatus 1 conveys the pedestal 9 on which the article 3 is placed from the lower right side of FIG. 1 toward the upper left side, and wraps the pedestal 9 and the article 3. The upper side, the lower side, the left diagonally 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 in FIG. 1 is referred to as the upstream side in the transport direction. The upper left side in FIG. 1 is referred to as the downstream side in the transport direction.

  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 shape of the lower housing 803 is a substantially rectangular parallelepiped with the left-right direction as the longitudinal direction. The upper housing 801 includes two standing portions 802A and a erection portion 802B. The two standing portions 802A extend upward from the left and right ends of the lower housing 803, respectively. The erection part 802B is erected between the upper ends of the two erection parts 802A. Each of the two standing portions 802A covers the side plate portion 11 (see FIG. 2, described later) from the outside in the left-right direction. The erection part 802B covers the film cassette 2 (see FIG. 2, described later) from above. An opening 805 surrounded by the lower housing 803, the two standing portions 802A, and the erection portion 802B is formed on each of the upstream side surface and the downstream side surface of the housing 800.

  As shown in FIG. 1, 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 portion of the side surface on the downstream side 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. Leg portions 121 and 131 are provided below the cradles 12 and 13, respectively. The leg portions 121 and 131 support the cradle 12 and 13 from below, respectively. The cradle 12 receives the pedestal 9 conveyed toward the opening 805 on the upper surface. The cradle 13 receives the pedestal 9 and the article 3 whose packaging has been completed on the upper surface. Hereinafter, the upper surface of the cradle 12 is referred to as a “receiving surface 12A”, and the upper surface of the cradle 13 is referred to as a “receiving surface 13A”. With the cradles 12 and 13 extending in the horizontal direction, the receiving surfaces 12A and 13A are horizontal and form the same plane. Hereinafter, a path portion of the pedestal 9 which is a plane formed by the receiving surfaces 12A and 13A and is transported is referred to as a “transport path 103”.

  Although not shown in the figure, the user can manually swing the cradles 12 and 13 to switch the receiving surfaces 12A and 13A to be vertical. In this case, the cradle 12, 13 closes the opening 805 (see FIG. 1).

  As shown in FIG. 2, the packaging device 1 includes a bottom portion 10 and side plate portions 111 and 112. The shape of the bottom 10 is a rectangular shape in plan view. The side plate portion 111 extends in the upward vertical direction from the right end portion of the bottom portion 10. The side plate portion 112 extends in the upward vertical direction from the left end portion of the bottom portion 10. Hereinafter, the side plate portions 111 and 112 may be collectively referred to as “side plate portion 11”. The shape of the side plate portion 11 is a substantially rectangular plate shape whose longitudinal direction is the vertical direction.

  As shown in FIG. 2, a belt 511 is provided at the right end of the cradle 12, 13, and a belt 512 is provided at the left end of the cradle 12, 13. Each of the belts 511 and 512 is an endless belt having teeth on the inner surface side. Hereinafter, the belts 511 and 512 may be collectively referred to as “belt 51”. The belt 51 is a composite material such as fiber and urethane rubber, and is elastically deformable. The belt 51 is installed between the main pulley and the pulley, and extends from the upstream end of the cradle 12 to the downstream end of the cradle 13.

  As shown in FIG. 3, a main pulley 524 is arranged at the approximate center in the transport direction on the left side surface of the side plate portion 111 (see FIG. 2). The axial center of the main pulley 524 faces in the left-right direction. The main pulley 524 contacts the inside of the belt 512. The main pulley 524 has teeth on the outer surface and engages with the teeth on the inner side of the belt 512. The main pulley 524 is connected to a second motor (not shown) via a plurality of gears. As the second motor rotates, the main pulley 524 rotates and the belt 12 rotates. Although not shown in the drawing, the belt 511 is engaged with a main driving pulley (not shown) similarly to the belt 512, and rotates with the rotation of the main driving pulley.

  As shown in FIG. 2, a conveyance unit 60 is provided on the outer side surface of each of the belts 511 and 512. The conveyance unit 60 engages with the base 9. The conveyance unit 60 conveys the pedestal 9 from the upstream side to the downstream side by moving from the cradle 12 to the cradle 13 as the belt 51 rotates.

  As shown in FIG. 4, a plate-like installation plate 117 is installed between the upper ends of the side plate units 111 and 112. The erection plate 117 includes a horizontal portion 117A extending horizontally, a vertical portion 117B extending vertically upward from an upstream end of the horizontal portion 117A, and a vertical portion extending vertically upward from a downstream end of the horizontal portion 117A. 117C. The film cassette 2 (see FIGS. 2 and 6) is placed on the upper side of the horizontal portion 117 </ b> A, so that the film cassette 2 is attached to the packaging device 1. A torque adjustment mechanism 40 is provided on the upper side of the horizontal portion 117 </ b> A and on the right side surface of the side plate portion 112. The torque adjustment mechanism 40 is supported on the left side of the support plate 19 that extends upward from the horizontal portion 117 </ b> A and parallel to the side plate portion 112. A wall plate 18 that covers the upstream side, the downstream side, and the right side of the torque adjustment mechanism 40 is provided above the horizontal portion 117A. A recessed portion 18 </ b> A that is recessed downward is provided at the upper end of the portion of the wall plate 18 that covers the right side of the torque adjustment mechanism 40.

  The torque adjustment mechanism 40 will be described with reference to FIGS. 4 and 5. In FIG. 5, the near side of the paper surface is the right side, and the depth side of the paper surface is the left side. In FIG. 5, the film gear 273 (see FIGS. 5 and 7) of the film cassette 2 is illustrated. Although not shown in FIG. 5, the film cassette 2 extends to the right side. As shown in FIG. 5, the torque adjustment mechanism 40 includes a first gear 41, a second gear 42, a third gear 43, a fourth gear 44, a first load (not shown), a second load (not shown), a lever. 47, a fixing portion 48, and the like. The first gear 41 to the fourth gear 44 are spur gears. The first load and the second load are clutch springs.

  The lever 47 includes a main body 471. The main body 471 is the lower end of the lever 47 and is disposed on the left side of the support plate 19 (see FIG. 4). The lever 47 can swing between a state in which the lever 47 is inclined rearward with respect to the vertical direction and a state in which the lever 47 is directed upward in the vertical direction with the swing shaft 476 as the center. A rotating shaft 477 extending in the right horizontal direction (front side in FIG. 5) is provided above the lower end of the main body 471. The rotation shaft 477 rotatably supports the second gear 42 on the right side of the support plate 19.

  A fixing portion 48 is provided above the main body portion 471 of the lever 47. The fixing portion 48 is a bent plate shape and is supported on the left side of the support plate 19. A through hole 481 (see FIGS. 2 and 4) is provided in a portion of the fixed portion 48 that extends obliquely downward. The lever 47 is inserted into the through hole 481. The through hole 481 has a shape in which three round holes are connected. The lever 47 can swing along the through hole 481 and is locked in one of the three round holes.

  The first gear 41 is rotatably supported on the swing shaft 476. The first gear 41 is supported by a portion extending in the right direction (front side in FIG. 5) of the swing shaft 476 extending horizontally from the support plate 19 (see FIG. 4) to both sides in the left-right direction. The first gear 41 does not swing even when the lever 47 swings about the swing shaft 476. The second gear 42 is rotatably supported on the rotation shaft 477. The second gear 42 swings as the lever 47 swings about the swing shaft 476. The first gear 41 and the second gear mesh. The first gear 41 is exposed adjacent to the recess 18A (see FIG. 4). The first gear 41 is fitted to the film gear 273 exposed from the hole 255 provided on the front surface of the protruding portion 253 (see FIG. 6) in a state where the film cassette 2 is mounted on the packaging device 1. The first gear 41 rotates when the film gear 273 rotates as the film 24 is unwound from the film roll 22. The second gear 42 rotates as the first gear 41 rotates.

  A third gear 43 is provided on the downstream side of the first gear 41. A fourth gear 44 is provided below the film gear 273 when the film cassette 2 is mounted on the packaging device 1. The rotation shaft of the third gear 43 extends horizontally to the left through a hole provided in the support plate 19. A first load (not shown) is connected to the left end (depth side in FIG. 5) of the rotation shaft of the third gear 43. The first load is fixed to the support plate 19 with screws. The rotation shaft of the fourth gear 44 extends horizontally to the left through a hole provided in the support plate 19. A second load (not shown) is connected to the left end of the rotation shaft of the fourth gear 44. The second load is fixed to the support plate 19 with screws. The first load and the second load apply torque to the third gear 43 and the fourth gear 44, respectively. The strength of the torque that the second load applies to the fourth gear 44 is greater than the strength of the torque that the first load applies to the third gear 43.

  As shown in FIG. 5, in the state where the lever 47 swings from the vertically extended state to slightly tilted upstream (hereinafter referred to as “first state”), the second gear 42 is in the third state. It does not mesh with any of the gear 43 and the fourth gear 44. Torque applied by the first load to the third gear 43 and torque applied by the second load to the fourth gear 44 are not transmitted to the film gear 273. Therefore, the tension acting on the film 24 fed out from the film roll 22 is the smallest.

  When the lever 47 changes from the state shown in FIG. 5 to a state where the lever 47 is swung clockwise (in the direction of the arrow 861) in the right side view (hereinafter referred to as “second state”), the second gear 42 is moved. It moves clockwise (in the direction of arrow 862) and meshes with the third gear 43. The fourth gear 44 does not mesh with the second gear 42. Torque applied to the third gear 43 by the first load is transmitted to the first gear 41 via the second gear 42. Accordingly, when a small torque is applied to the film gear 273 via the first gear 41, the tension acting on the film 24 fed out from the film roll 22 becomes larger than that in the first state.

  When the lever 47 swings counterclockwise (in the direction of arrow 863) as viewed from the right side in the first state, the second gear 42 moves counterclockwise (in the direction of arrow 864), and the fourth Engage with the gear 44. At this time, the lever 47 extends in the vertical direction. The third gear 43 does not mesh with the second gear 42. Torque applied by the second load to the fourth gear 44 is transmitted to the first gear 41 via the second gear 42. Therefore, when a large torque is applied to the film gear 273 via the first gear 41, the tension acting on the film 24 fed out from the film roll 22 becomes larger than that in the second state. In addition, the sensor which is not shown in figure is provided in the packaging apparatus 1, and it can detect whether it is a 1st state, a 2nd state, and a 3rd state.

  As shown in FIGS. 2 and 4, support portions 34 are provided on the left side of the side plate portion 111 and the right side of the side plate portion 112, respectively. As shown in FIG. 3, the support portion 34 is a plate-like member having a substantially inverted L shape when viewed from the right side. As shown in FIG. 3, the two support portions 34 support the left and right end portions of the guide roller 31, the first auxiliary roller 32, and the second auxiliary roller 33. The diameter of the guide roller 31 is larger than the diameter of each of the first auxiliary roller 32 and the second auxiliary roller 33. The guide roller 31, the first auxiliary roller 32, and the second auxiliary roller 33 are arranged in order from the downstream side to the upstream side. The vertical positions of the lower ends of the guide roller 31 and the first auxiliary roller 32 are substantially the same. The vertical position of the lower end of the second auxiliary roller 33 is above the vertical position of the upper ends of the guide roller 31 and the first auxiliary roller 32. Hereinafter, the guide roller 31, the first auxiliary roller 32, and the second auxiliary roller 33 may be collectively referred to as “movable roller 30”. The support roller 34 moves up and down between the uppermost position (see FIG. 3) and the lowermost position (see FIG. 14) via a carriage (not shown) by driving a first motor (not shown), so that the movable roller 30 moves up and down.

  Hereinafter, the path of the guide roller 31 that moves up and down by the movement of the support portion 34 is referred to as a “movement path 104”. When the guide roller 31 moves to the lowest position along the movement path 104 (see FIG. 14), the guide roller 31 is positioned below the conveyance path 103. The conveyance path 103 and the movement path 104 intersect. A position where the conveyance path 103 and the movement path 104 intersect is referred to as an “intersection position 105” (see FIG. 3).

  As shown in FIG. 3, a cutting portion 77 is provided on the lower side of the conveyance path 103 in a portion sandwiched between the side plate portions 111 and 112 (see FIG. 2). The cutting part 77 includes a blade part 771 that protrudes upward from the upper surface (see FIG. 15). The blade portion 771 extends in the left-right direction. The cutting part 77 is connected to a carriage (not shown). When the carriage is driven by a fifth motor (not shown), the cutting portion 77 moves in the left-right direction along the guide rail 74 (see FIG. 15), and the blade portion 771 cuts the film 24 in the width direction.

  As shown in FIGS. 2 and 3, a pedestal guide roller 71 is provided on the upstream side of the portion sandwiched between the side plate portions 111 and 112 and below the conveyance path 103 (see FIG. 3). As shown in FIG. 2, the pedestal guide roller 71 includes a shaft portion 711 and a plurality of roller portions 712. The shaft portion 711 extends in the left-right direction. The plurality of roller portions 712 are provided at equal intervals in the axial direction of the shaft portion 711. The pedestal guide roller 71 supports the pedestal 9 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.

  As shown in FIGS. 2 and 3, a holding roller 72 is provided on the downstream side of the pedestal guide roller 71. The holding roller 72 extends in the left-right direction. As shown in FIG. 3, the left and right end portions of the holding roller 72 are rotatably supported by the holding portion 78. The holding part 78 is swung by a sixth motor (not shown). When the holding portion 78 swings, the holding roller 72 is disposed close to the downstream side of the pedestal guide roller 71 (see FIG. 3), and the holding roller 72 is separated downward from the pedestal guide roller 71 ( (See FIG. 13). As shown in FIG. 3, when the holding roller 72 is arranged close to the downstream side of the pedestal guide roller 71, the film 24 discharged from the film cassette 2 can be sandwiched and supported between the pedestal guide roller 71.

  As shown in FIG. 3, a heating unit 86 is provided in the vicinity of the downstream side of the holding roller 72. The heating unit 86 includes a heater (not shown) on the upper surface. The heater is a resistance heating type heater that heats by passing an electric current. The heater contacts the film 24 to heat the film 24 and adheres the film 24 to the base 9. The heating unit 86 moves in the vertical direction as the third motor (not shown) rotates. The upper surface of the heater of the heating unit 86 arranged at the lowest position is covered with a lid portion 86A.

  A rotation suppression unit 80 is provided on the downstream side of the heating unit 86. A stopper 81 is provided at the upstream end of the rotation suppression unit 80. The shape of the stopper 81 is a square bar having a cross-sectional shape and extends in the left-right direction. The stopper 81 includes a rubber 811 on the upstream side surface (see FIG. 15). The stopper 81 moves in the transport direction as the fourth motor (not shown) is driven. When the stopper 81 moves to the upstream side, the rubber 811 of the stopper 81 is pressed against the guide roller 31 side (see FIG. 16). The rotation of the guide roller 31 is prohibited by the frictional force between the rubber 811 and the guide roller 31.

  The pedestal 9 will be described. As shown in FIG. 1, the pedestal 9 is produced by bending a substantially rectangular plate-shaped member upward at left and right bent portions 911 and 912. An example of the base 9 is a cardboard board. In the following description, a portion forming the bottom surface of the base 9 is referred to as a plate-like portion 905. In addition, the downstream end of the plate-like portion 905 in a state where the pedestal 9 is disposed in the packaging device 1 is referred to as a side 901, and the upstream end is referred to as a side 902.

  The film cassette 2 will be described with reference to FIGS. The upper right side, lower left side, upper left side, lower right side, upper side, and lower side in FIG. 6 will be described as the front side, the rear side, the right side, the left side, the upper side, and the lower side of the film cassette 2, respectively. In the following description, the left-right direction in which the cassette case 21 and the film roll 22 extend may be referred to as an axial direction. When the film cassette 2 is placed on the horizontal portion 117 </ b> A (see FIG. 4) of the packaging device 1, the rear side of the film cassette 2 is placed facing the upstream side of the packaging device 1.

  As shown in FIGS. 6 to 10, the film cassette 2 includes a cassette case 21 and a film roll 22 (see FIGS. 7 and 8). The cassette case 21 includes a case 25, a flange 27 (see FIGS. 8 and 10), and an elastic member 28. The case 25 extends in the axial direction. The case 25 accommodates the film roll 22 inside and supports the film roll 22 in a rotatable manner.

  The case 25 includes an upper case 251 that forms the upper half of the case 25 and a lower case 252 that forms the lower half. The case 25 is rounded in a side view, and the front surface of the lower case 252 extends in the vertical direction (see FIG. 9). A protrusion 261 is provided at the front end of the upper case 251, and a protrusion 263 is provided at the rear end. A protrusion 262 is provided at the front end of the lower case 252, and a protrusion 264 is provided at the rear end. The protrusion 261 and the protrusion 262 have a width in the axial direction and protrude forward. The protrusions 263 and 264 have a width in the axial direction and protrude rearward. The protruding portion 261 and the protruding portion 262 are fixed by the three fixing members 265, and the protruding portion 263 and the protruding portion 264 are fixed by the three fixing members 265, so that the upper case 251 and the lower case 252 are connected. ing. The fixing member 265 is made of a screw. When the film cassette 2 is placed on the horizontal portion 117A (see FIG. 4) of the packaging device 1, the protruding portions 262 and 264 are supported by the vertical portions 117B and 117C, respectively.

  The left and right side walls in the axial direction of the case 25 are referred to as side walls 266. As shown in FIG. 6, a protrusion 253 that protrudes toward the left in the axial direction is provided at the center of the left side wall 266 of the case 25. As shown in FIG. 10, a protruding portion 254 that protrudes toward the right in the axial direction is provided at the center of the right side wall 266 in the axial direction of the case 25. As shown in FIGS. 6 and 7, a hole 255 is provided on the front surface of the protrusion 253. Similarly, a hole 255 is provided on the front surface of the protruding portion 254, but the illustration is omitted. The left and right hole portions 255 expose the left and right film gears 273 (see FIG. 10, which will be described later) disposed in the protrusions 253 and 254 to the outside. When the film cassette 2 is placed on the horizontal portion 117 </ b> A (see FIG. 4) of the packaging device 1, the left protrusion 253 fits into the recess 18 </ b> A (see FIG. 4) of the wall plate 18. At this time, the left film gear 273 meshes with the first gear 41 through the hole 255 (see FIG. 5). A recess is provided on the side plate 111 as well as the recess 18A, and the right protrusion 253 is fitted in the recess. Accordingly, a gear that meshes with the film gear 273 on the right side may be provided in the packaging device 1 so that torque is applied to the film roll 22.

  As shown in FIGS. 6, 7, and 9, a film discharge port 26 that opens downward in the axial direction is provided at a lower portion of the rear end portion of the case 25. The film 24 drawn out from the film roll 22 is drawn out of the case 25 downward from the film discharge port 26. As shown in FIG. 6, an opening 258 is provided in the upper right part of the upper case 251. The user can check the remaining amount of the film 24 of the film roll 22 accommodated in the case 25 through the opening 258.

  As shown in FIG. 7, the film roll 22 accommodated in the case 25 extends in the axial direction. As shown in FIG. 10, the film roll 22 includes a paper tube 221 and a packaging film 24. The paper tube 221 is cylindrical and extends in the axial direction. The film 24 is wound around the paper tube 221.

  As shown in FIGS. 8 and 10, flanges 27 are attached to both ends of the film roll 22 in the axial direction. The flange 27 includes a wall portion 271, a cylindrical portion 272 (see FIG. 10), and a film gear 273. The wall portion 271 has a circular plate shape in a side view, and is disposed at the left and right ends of the film roll 22.

  The cylindrical portion 272 protrudes in a cylindrical shape from the wall portion 271 toward the inner side in the axial direction of the film roll 22. The cylindrical portion 272 has a diameter along the inner periphery of the paper tube 221 of the film roll 22. The flange 27 is fixed to the film roll 22 by fitting the tube portion 272 inside the paper tube 221. The film gear 273 protrudes outward in the axial direction of the film roll 22. As shown in FIG. 10, the film gear 273 is fixed by a plurality of screws 274 that protrude outward in the axial direction at the center portion of the wall portion 271. As shown in FIGS. 7 and 10, the film gears 273 of the left and right flanges 27 are located inside the left and right protrusions 253 and 254 of the case 25. When the film roll 22 is rotated by pulling out the film 24, the flange 27 is rotated. For this reason, the film gear 273 rotates.

  As shown in FIG. 10, an elastic member 28 is provided between the inner surface 267 of the case 25 in the left and right side walls 266 and the wall portion 271 of the flange 27. In the following description, the left elastic member 28 may be referred to as an elastic member 281, and the right elastic member 28 may be referred to as an elastic member 282. As shown in FIG. 9, the elastic member 28 has a rectangular shape in side view. The pair of elastic members 281 and 282 are positioned below the protrusions 253 and 254 in the vertical direction, and are positioned on the axial direction side on the outer periphery of the paper tube 221 and on the axial direction side on the inner side of the outer periphery. The pair of elastic members 281 and 282 are opposed to each other in the axial direction with the film roll 22 interposed therebetween.

  As shown in FIGS. 10 and 11, the elastic member 28 includes a first member 283 and a second member 284. The first member 283 and the second member 284 are overlapped in the axial direction. The first member 283 is formed of an elastic member such as rubber or felt, for example. The second member 284 is, for example, a synthetic resin plate and has a smaller elastic force than the first member 283. The elastic member 28 is fixed by sticking the first member 283 to the inner surface 267 of the side wall 266 with, for example, an adhesive or a double-sided adhesive tape. As shown in FIG. 10, the second member 284 is in contact with the wall portion 271 of the flange 27. The flange 27 is slidable with respect to the second member 284. The elastic member 28 is disposed between the inner surface 267 of the side wall 266 and the flange 27 in a compressed state. For this reason, the elastic member 28 presses the flange 27 toward the film roll 22 side. The rotation of the film roll 22 is restricted by the pressing force of the elastic member 28. 11 shows a state in which the elastic member 281 shown in FIG. 11 is fixed to the side wall 266 in the process of assembling the film cassette 2, and shows a state before being brought into contact with the flange 27. For this reason, the elastic member 281 is not compressed.

  With reference to FIGS. 3 and 12 to 17, a packaging process executed by a CPU (not shown; hereinafter simply referred to as “CPU”) of the packaging apparatus 1 will be described. The user turns on the power of the packaging device 1 when performing the work of packaging the base 9 and the article 3 with the film 24 using the packaging device 1. When the packaging apparatus 1 is powered on, the CPU reads and executes the program stored in the storage device, thereby executing the following packaging process.

  The CPU initializes the state of the packaging device 1. Specifically, it is as follows. As shown in FIG. 3, the CPU drives a first motor (not shown) to raise the support portion 34 and arrange it at the highest position. Accordingly, the movable roller 30 (the guide roller 31, the first auxiliary roller 32, and the second auxiliary roller 33) supported by the support portion 34 is disposed at the uppermost position. The CPU drives a second motor (not shown), rotates the belt 51, and causes the transport unit 60 (see FIG. 1) to protrude upward from the receiving surface 12A of the cradle 12. The packaging device 1 is in a state in which the user can set the pedestal 9 on the receiving surface 12A of the cradle 12.

  The CPU drives a third motor (not shown) to lower the heating unit 86 and arrange it at the lowest position. Accordingly, the heater on the upper surface of the heating unit 86 is separated from the conveyance path 103. The CPU drives a fourth motor (not shown) to move the stopper 81 downstream. The CPU drives a fifth motor (not shown) to move the cutting unit 77 to the left side. The CPU drives a sixth motor (not shown) to swing the holding portion 78. The holding roller 72 is in a state of being separated downward with respect to the base guide roller 71. Although not shown in FIG. 3, when the holding roller 72 is separated downward with respect to the pedestal guide roller 71, the position is the same as that of the holding roller 72 shown in FIG. 14. Initialization is executed as described above.

  The user places the film cassette 2 on the packaging device 1. The user manually pulls out the film 24 discharged from the film discharge port of the film cassette 2 downward through the upstream side of the second auxiliary roller 33. When the film 24 is pulled out, the film roll 22 rotates clockwise in a right side view. The film 24 is guided slightly upstream by contacting the upstream side of the second auxiliary roller 33. The user pulls the leading end of the film 24 drawn downward to the lower side of the conveyance path 103 and arranges it on the downstream side of the pedestal guide roller 71.

  The user performs an input operation for notifying the packaging apparatus 1 that the film 24 is ready via the input unit 205 (see FIG. 1). The CPU drives the sixth motor and swings the holding portion 78. As shown in FIG. 3, when the holding portion 78 swings, the holding roller 72 is disposed in the vicinity of the downstream side of the pedestal guide roller 71. The leading edge of the film 24 discharged from the film cassette 2 is sandwiched from both sides in the transport direction by the pedestal guide roller 71 and the holding roller 72. The film 24 and the transport path 103 intersect in the vicinity of the front end of the film 24.

  The user sets the lever 47 of the torque adjustment mechanism 40 (see FIGS. 2 and 5) to any one of the first state, the second state, and the third state according to the type of the article 3 to be packaged. Torque is applied to the film roll 22 by the torque adjusting mechanism 40. A tension according to the state of the lever 47 acts on the film 24. The film 24 is in a state of extending straight in the vertical direction between the upstream side of the second auxiliary roller 33 and the portion sandwiched between the pedestal guide roller 71 and the holding roller 72. In addition, since the rotation of the film roll 22 is regulated by the elastic member 28, torque associated with the regulation by the elastic member 28 is also applied to the film roll 22 in the first to third states.

  The user places the base 9 on the cradle 12 (see FIG. 1). The pedestal 9 is in a state that can be transported downstream by the transport unit 60. The user places the article 3 on the plate-like portion 905 of the pedestal 9 placed on the cradle 12. The user inputs an instruction to start packaging the base 9 and the article 3 with the film 24 via the input unit 205.

  When a packaging start instruction is input, the CPU drives the second motor to rotate the main driving pulley 524 and the like, thereby rotating the belt 51. As the belt 51 rotates, the transport unit 60 transports the pedestal 9 from the upstream side to the downstream side along the transport path 103. Hereinafter, the rotation direction of the second motor and the belt 51 when the pedestal 9 is transported 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 downstream end of the pedestal 9 gradually approaches the film 24 extending in the vertical direction. The downstream end (side 901) of the plate-like portion 905 of the pedestal 9 contacts the film 24 and then passes over the holding roller 72. As the base 9 moves downstream (arrow 142 in FIG. 3), the side 901 of the plate-like portion 905 of the base 9 pushes the film 24 downstream. The pedestal 9 moves further downstream.

  The side 901 of the plate-like portion 905 of the pedestal 9 passes above the heating unit 86. The leading end of the film 24 is sandwiched between the pedestal guide roller 71 and the holding roller 72. When the film 24 is pushed downstream by the side 901 of the plate-like portion 905 of the pedestal 9, the front end of the film 24 goes around the lower surface of the plate-like portion 905 of the pedestal 9.

  The CPU determines that the side 901 of the plate-like portion 905 of the pedestal 9 has moved to the downstream side by a predetermined distance with respect to the upper position of the heating unit 86, and the second after the conveyance to the downstream side of the pedestal 9 is started. Detection is based on the number of rotations of the motor. When the side 901 of the plate-like portion 905 of the pedestal 9 moves a predetermined distance downstream from the position above the heating unit 86, the CPU stops the conveyance of the pedestal 9 to the downstream side (see FIG. 12).

  As shown in FIG. 12, the CPU drives the third motor and raises the heating unit 86. When the heating unit 86 rises to the uppermost position (arrow 143), the upper surface of the heating unit 86 is close to the transport path 103 from below. The side 901 of the plate-like portion 905 of the pedestal 9 is moved downstream by a predetermined distance from the upper position of the heating portion 86, and the film 24 wraps around the lower surface of the plate-like portion 905 of the pedestal 9. . Accordingly, the film 24 is sandwiched between the upper surface of the heating part 86 and the lower surface of the plate-like part 905 of the pedestal 9 in a state where the heating part 86 is disposed at the uppermost position.

  The CPU heats the heater of the heating unit 86. The heater heats the tip of the film 24 and melts the tip of the film 24. The front end of the melted film 24 adheres to the vicinity of the side 901 in the lower surface of the plate-like portion 905 of the base 9. The CPU stops the heating of the heater after a predetermined time has elapsed since the heating of the heater was started. The predetermined time is a time required for heating the temperature of the film 24 to the melting point by the heater. The CPU drives the third motor to lower the heating unit 86 (arrow 144 in FIG. 13). The upper surface of the heating unit 86 is spaced downward from the conveyance path 103.

  The CPU drives the sixth motor to swing the holding portion 78 in the counterclockwise direction (see arrow 145 in FIG. 13) when viewed from the right side. As the holding portion 78 swings in the direction of the arrow 145, the holding roller 72 is separated from the pedestal guide roller 71 downward. The pedestal guide roller 71 and the holding roller 72 release the front end of the sandwiched film 24. The leading end of the film 24 is melted by a heated heater and adhered to the lower surface of the pedestal 9. The CPU drives the second motor, rotates the belt 51 in the forward direction, and conveys the base 9 to the downstream side (arrow 146 in FIG. 13). The leading end of the film 24 is released from the pedestal guide roller 71 and the holding roller 72. The leading end of the film 24 is moved downstream as the pedestal 9 moves while being adhered to the lower surface of the pedestal 9.

  As the pedestal 9 moves downstream, the side 901 of the plate-like portion 905 of the pedestal 9 and the downstream end of the article 3 are pressed against the film 24. The film 24 bends at the side 901 of the plate-like portion 905 of the base 9 and the contact portion with the article 3. The film 24 is fed out from the film roll 22 little by little. The film 24 is pressed against the base 9 and the article 3 by the torque applied to the film roll 22 from the torque adjusting mechanism 40 and the elastic member 28. The film 24 is in close contact with the base 9 and the article 3 at a position covering the plate-like portion 905 of the base 9 and the downstream side of the article 3. As illustrated in FIG. 13, when the side 902 of the plate-like portion 905 of the pedestal 9 moves to the downstream side of the intersection position 105, the CPU stops driving the second motor and stops the conveyance of the pedestal 9.

  As shown in FIG. 14, the CPU drives the first motor to lower the support portion 34 (arrow 147). The movable roller 30 supported by the support part 34 moves from the highest level to the lowest level. The guide roller 31 descends from the uppermost side to the lowermost side along the movement path 104. The guide roller 31 comes into contact with the film 24 arranged below from above, and guides the film 24 downward along the movement path 104.

  The guide roller 31 is in contact with the conveyance path 103 from below at the lowest position. The film 24 is disposed at a position covering the plate-like portion 905 of the base 9 and the upstream side of the article 3. The film 24 extends from the portion that contacts the side 902 of the plate-like portion 905 of the base 9 toward the guide roller 31, contacts the downstream side and the lower side of the guide roller 31, and extends upstream, and the first auxiliary roller 32. It contacts the lower side and extends further upstream, and contacts the lower side and upstream side of the second auxiliary roller 33 to reach the film roll 22.

  The CPU drives the second motor to rotate the belt 51 in the reverse direction. The conveyance unit 60 moves from the downstream side to the upstream side, and conveys the base 9 along the conveyance path 103 to the upstream side. The pedestal 9 is conveyed in the reverse direction (the direction from the downstream side to the upstream side, see arrow 148).

  As the pedestal 9 moves from the downstream side to the upstream side, the side 902 of the plate-like portion 905 of the pedestal 9 crosses the intersection position 105 from the downstream side toward the upstream side. The side 902 of the plate-like portion 905 of the pedestal 9 passes above the heating unit 86 and moves upstream. The guide roller 31 relatively moves toward the downstream side from the side 902 in a state where the guide roller 31 is in contact with the lower surface of the plate-like portion 905 of the base 9 from below. The film 24 is sandwiched between the lower surface of the plate-like portion 905 of the base 9 and the guide roller 31.

  As shown in FIG. 15, the film 24 extends downstream from the portion that contacts the side 902 of the plate-like portion 905 of the pedestal 9 along the lower surface of the plate-like portion 905 and winds around the guide roller 31 from above. The direction of the guide roller 31 extends from the lower side to the upstream side, contacts the lower side of the first auxiliary roller 32, further extends to the upstream side, and contacts the lower side and the upstream side of the second auxiliary roller 33. The film roll 22 is reached. When the side 902 of the plate-like portion 905 of the pedestal 9 moves a predetermined distance upstream from the upper position of the heating unit 86, the CPU stops the conveyance of the pedestal 9.

  The CPU drives the fourth motor and moves the stopper 81 of the rotation suppression unit 80 to the upstream side (arrow 149). On the upstream side of the stopper 81 of the rotation suppressing unit 80, the guide roller 31 arranged in the lowest position is located. When the stopper 81 moves upstream, the rubber 811 (see FIG. 15) of the stopper 81 comes close to the guide roller 31 and sandwiches the film 24 wound around the guide roller 31 between the guide roller 31. (See FIG. 16). When the rubber 811 of the stopper 81 pushes the guide roller 31 upstream through the film 24, the rotation of the guide roller 31 is prohibited. The film 24 is sandwiched between the guide roller 31 and the rubber 811 of the stopper 81.

  The CPU drives the fifth motor to move the cutting portion 77 from the left side to the right side along the guide rail 74 (see FIG. 15). The upper end of the blade portion 771 of the cutting portion 77 is located above the film 24 extending substantially horizontally between the lower side of the guide roller 31 and the lower side of the first auxiliary roller 32 (see FIG. 15). For this reason, when the cutting portion 77 moves to the right side, the film 24 is cut by the blade portion 771 at a portion extending between the guide roller 31 and the first auxiliary roller 32. The cutting part 77 separates the part of the film 24 that covers the plate-like part 905 of the base 9 and the article 3 from the part wound around the film roll 22.

  Here, when the blade portion 771 is moved in the right direction in a state of being in contact with the film 24 to cut the film 24, a force for guiding the film 24 to the right side acts. However, the rotation of the guide roller 31 is prohibited by the stopper 81. The stopper 81 sandwiches the film 24 between the guide roller 31 and the stopper 81. For this reason, since the position of the film 24 with respect to the guide roller 31 becomes fixed, the film 24 does not move to the right side by the blade portion 771. Therefore, the blade part 771 can cut the film 24 appropriately. Even after the film 24 is cut, the guide roller 31 and the stopper 81 maintain the state where the film 24 is sandwiched. Therefore, the film 24 is not displaced from the article 3 after being cut by the blade 771.

  As shown in FIG. 16, after the film 24 is cut, the cut end of the film 24 extending from the film roll 22 hangs down to the lower side of the pedestal guide roller 71. As shown in FIG. 17, the CPU drives the sixth motor to swing the holding portion 78 in the direction of the arrow 150. In this case, the holding roller 72 is disposed close to the downstream side of the pedestal guide roller 71. An end portion of the film 24 cut by the cutting portion 77 is sandwiched between the pedestal guide roller 71 and the holding roller 72.

  The CPU drives the third motor and raises the heating unit 86 (arrow 151). With the heating unit 86 raised to the uppermost position, the upper surface of the heating unit 86 is close to the conveyance path 103 from below and the film 24 is sandwiched between the base 9 and the film 24. The CPU heats the heater of the heating unit 86. The heater heats the end portion of the film 24 cut by the cutting portion 77 to melt the film 24. The melted film 24 is adhered to the vicinity of the side 902 of the plate-like portion 905 of the base 9. The film 24 cut from the film roll 22 is in a state of covering the base 9 and the article 3. The CPU stops the heating of the heater after a predetermined time has elapsed since the heating of the heater was started. The CPU drives the third motor to lower the heating unit 86 (arrow 152). The upper surface of the heating unit 86 is separated from the conveyance path 103.

  The CPU drives the fourth motor and moves the stopper 81 of the rotation suppression unit 80 to the downstream side. The stopper 81 moves downstream, and the rubber 811 provided on the stopper 81 is separated from the guide roller 31. The guide roller 31 is in a rotatable state. The CPU drives the second motor, rotates the belt 51 in the forward direction, and conveys the base 9 to the downstream side. The pedestal 9 and the article 3 that have been packaged are transported to the downstream side and placed on the cradle 13.

  Note that, by swinging the holding portion 78, the end portion of the film 24 cut by the cutting portion 77 is held between the pedestal guide roller 71 and the holding roller 72. For this reason, the user can continuously wrap the next pedestal 9 and the article 3 with the film 24 without pulling out the film 24 from the film cassette 2 and sandwiching the tip between the pedestal guide roller 71 and the holding roller 72. Is possible. When the user continuously performs the packaging operation, the CPU drives the second motor so that the belt 51 rotates in the reverse direction after the packaging process is completed. The CPU moves the transport unit 60 from the downstream side to the upstream side and arranges the transport unit 60 on the cradle 12. At the same time, the CPU brings the support part 34 and the cutting part 77 into a state immediately after initialization.

  As described above, the film cassette 2 of the present embodiment is used to execute the packaging process. In the present embodiment, even when the film 24 is cut (see FIGS. 15 and 16) and the film 24 is changed from a tensioned state to a state in which no tension is applied, the flange 27 with which the elastic member 28 abuts and the elasticity It is possible to prevent the film roll 22 from rotating backward (rotating counterclockwise when viewed from the right side) by the frictional force between the member 28 and the member 28. Therefore, the film 24 is not rewound. For this reason, as shown in FIG. 16, after the film 24 is cut, the cut end of the film 24 extending from the film roll 22 hangs down to the lower side of the pedestal guide roller 71. For this reason, as shown in FIG. 17, when the holding portion 78 is swung in the direction of the arrow 150, the cut end portion of the film 24 extending from the film roll 22 is caused by the pedestal guide roller 71 and the holding roller 72. It is pinched. The user does not need to manually pull out the film 24 from the film roll 22 and place it between the pedestal guide roller 71 and the holding roller 72 in order to perform settings for the next packaging. That is, since the film 24 is not rewound, setting for the next packaging can be performed smoothly.

  In the second state and the third state, torque is generated when the film 24 is pulled out by the first load and the second load that are clutch springs, but when the film roll 22 rotates in the reverse direction, the torque is increased. It is not always generated. For this reason, although the film roll 22 is easy to reversely rotate compared with the case where the torque by the 1st load and the 2nd load generate | occur | produces, since the reverse rotation is prevented by the elastic member 28, the film 24 is rewound. Can be prevented. In addition, for example, it is assumed that torque is generated even when the film roll 22 rotates in reverse by the first load and the second load. In this case, since the frictional force by the elastic member 28 is generated in addition to the torque due to the first load and the second load, the reverse rotation of the film roll 22 can be further reliably prevented.

  Further, when the film 24 is consumed, the diameter of the film 24 wound around the paper tube 221 is reduced. For example, when the elastic member 28 is positioned on the axial direction side of the film 24 wound around the outer periphery of the paper tube 221, the film 24 is elastic in the axial direction by decreasing the diameter of the film 24. The members 28 may not line up. In this case, when the elastic member 28 comes into contact with the flange 27, the flange 27 that is to be bent inward in the axial direction by the contact pressure cannot be held by the film 24, and the flange 27 may be bent. As a result, the frictional force between the flange 27 and the elastic member 28 may be reduced. In the present invention, since the elastic member 28 is located on the axial direction side of the outer periphery of the paper tube 221 and on the axial direction side of the inner periphery of the paper tube 221, the flange 27 can be held by the paper tube 221. Therefore, it can prevent that the frictional force between the flange 27 and the elastic member 28 falls. Therefore, it can prevent more reliably that the film roll 22 reversely rotates.

  Further, the second member 284 that contacts the flange 27 has a smaller elastic force than the first member 283. That is, the second member 284 is harder than the first member 283. For this reason, compared with the case where the first member 283 contacts the flange 27, the frictional force between the flange 27 and the elastic member 28 with which the elastic member 28 contacts when the surrounding environment such as temperature and humidity changes is changed. Small change. Therefore, even if the surrounding environment changes, the frictional force between the flange 27 and the elastic member 28 can be maintained, and the film roll 22 can be prevented from rotating in the reverse direction.

  Further, the pair of elastic members 281 and 282 can sandwich the film roll 22 via the flange 27 from both ends in the axial direction of the film roll 22. Therefore, compared with the case where the elastic member 28 is provided only on one side of the film roll 22 in the axial direction, the frictional force between the flange 27 with which the elastic member 28 abuts and the elastic member 28 is stabilized. Therefore, it can prevent more reliably that the film roll 22 reversely rotates.

  In the above embodiment, the flange 27 is an example of the “mounting member” in the present invention. The case 25 is an example of the “housing member” in the present invention. The paper tube 221 is an example of the “tubular member” in the present invention.

  In addition, this invention is not limited to said embodiment, A various change is possible. For example, the film 24 is wound around the paper tube 221, but is not limited thereto. For example, the film 24 may be wound not on the paper tube 221 but on a synthetic resin cylindrical member such as plastic. Moreover, the film roll 22 should just be wound with the film 24 for packaging, and does not need to provide cores, such as a paper tube 221. FIG. Further, the film 24 may be wound around a cylindrical member instead of the cylindrical paper tube 221.

  The elastic member 28 is fixed to the case 25 and is in contact with the flange 27, but is not limited thereto. The elastic member 28 may be fixed to the flange 27 and abut on the surface 267 of the case 25. In this case, when the film roll 22 rotates, the elastic member rotates while coming into contact with the surface 267 as the flange 27 rotates. Even in this case, the same effect as that of the above-described embodiment can be obtained.

  Moreover, although the elastic member 28 was provided with the 1st member 283 and the 2nd member 284, it is not limited to this. The elastic member 28 only needs to have elasticity. For example, the elastic member 28 may be composed of only the first member 283.

  Further, although the pair of elastic members 281 and 282 face each other in the axial direction with the film roll 22 interposed therebetween, the present invention is not limited to this. For example, in addition to the pair of elastic members 281 and 282, a pair of elastic members 28 may be further provided so as to face each other in the axial direction across the film roll 22. Further, the elastic member 28 may be provided only on one side of the film roll 22 in the axial direction.

  Further, the elastic member 28 is located on the axial direction side of the outer periphery of the paper tube 221 and on the axial direction side of the inner periphery of the paper tube 221, but is not limited thereto. For example, you may be located in the axial direction inside the outer periphery of the paper tube 221. The portion of the flange 27 that is located on the inner axial side of the outer periphery of the paper tube 221 is held by the paper tube 221, so that the portion of the flange 27 is located on the outer axial side of the outer periphery of the paper tube 221. It is hard to bend than part. That is, the flange 27 pushed by the elastic member 28 can be supported by the paper tube 221. Therefore, it can prevent that the frictional force between the flange 27 and the elastic member 28 falls. Therefore, it can prevent that the film roll 22 reversely rotates. The elastic member 28 may be located on the outer side of the outer circumference of the paper tube 221 on the axial direction side.

  Further, when the film gear 273 is engaged with the torque adjusting mechanism 40 and the film 24 is pulled out, tension is applied to the film 24, but the present invention is not limited to this. For example, the film gear 273 may not be engaged with the torque adjustment mechanism 40. Even in this case, since the rotation of the film roll 22 is restricted by the frictional force of the elastic member 28, tension can be applied to the film 24 drawn from the film roll 22. Moreover, when the film 24 is cut | disconnected, it can prevent that the film roll 22 reversely rotates with the frictional force by the elastic member 28 similarly to the said embodiment. When the film gear 273 is not meshed with the torque adjusting mechanism 40, the film gear 273 may not be provided.

DESCRIPTION OF SYMBOLS 1 Packaging apparatus 2 Film cassette 21 Cassette case 22 Film roll 24 Film 25 Case 27 Flange 28,281,282 Elastic member 283 First member 284 Second member

Claims (5)

A film roll extending in the axial direction around which the packaging film is wound;
A storage member for storing the film roll therein;
A mounting member that is mounted on an end of the film roll in the axial direction and rotates integrally with the film roll;
A film cassette comprising: an elastic member fixed to one of the storage member and the mounting member and having elasticity contacting the other. The film roll includes a cylindrical member around which the film is wound,
The film cassette according to claim 1, wherein the elastic member is located on the axial direction side of the outer periphery of the cylindrical member or on the axial direction side of the outer periphery. The elastic member is
A first member having elasticity fixed to the one of the mounting member and the storage member;
The film cassette according to claim 1, further comprising a second member that abuts on the other of the mounting member and the storage member and has a smaller elastic force than the first member.   4. The film cassette according to claim 1, wherein at least a pair of the elastic members are provided and face each other in the axial direction across the film roll. A storage member capable of storing therein a film roll extending in an axial direction around which a packaging film is wound;
A mounting member that can be mounted on an end of the film roll in the axial direction and is rotatable integrally with the film roll;
A cassette case comprising: an elastic member fixed to one of the storage member and the mounting member and having elasticity capable of contacting the other.

Images