JP7401900B2 - Film feeding device and bag making and packaging machine equipped with film feeding device - Google Patents

Description

FIELD OF THE INVENTION The present invention relates to a film feeding device, and more particularly to a film feeding device having a connecting portion between the film of a used film roll and the film of a replacement film roll. The present invention also relates to a bag making and packaging machine equipped with this film supply device.

Conventionally, as in Patent Document 1 (Japanese Unexamined Patent Publication No. 2008-127092), a connection part that automatically connects the film of a used film roll and the film of a replacement film roll is provided, and continuous film supply is possible. A film feeding device is known. A film supply device equipped with such a film connection part can reduce the work required to replace film rolls, and also shorten the time required to replace film rolls.

In the film supply device disclosed in Patent Document 1 (Japanese Unexamined Patent Publication No. 2008-127092), automatic film connection is performed in the following flow.

First, the film of the used film roll (hereinafter referred to as the first film) is cut at predetermined locations. Next, a predetermined location of the first film and a predetermined location of the film of the replacement film roll (hereinafter referred to as a second film) whose starting end is being held are connected. Thereafter, the vicinity of the end of the first film and the vicinity of the start end of the second film are connected. After the connection, the film is supplied to the film supply destination.

In the film supply device disclosed in Patent Document 1 (Japanese Unexamined Patent Application Publication No. 2008-127092), the film supplied to the film supply destination has a connection point between the starting end of the second film and the connection point of the second film with the first film. The part in between remains as unnecessary part. Particularly, when the starting end of the second film and the connection point of the second film to the first film are far apart, a long unnecessary portion remains in the supplied film. The unnecessary portion of the film, especially if the unnecessary portion is long, may cause problems in film transport such as the unnecessary portion getting entangled with parts within the film supply device or at the film supply destination.

An object of the present invention is to provide a film supply device that includes a connecting portion between the film of a used film roll and the film of a replacement film roll, and is capable of reducing the length of an unnecessary portion of the film after the connection.

A film supply device according to a first aspect of the present invention includes a first holding section, a second holding section, a connecting section, and a cutting section. The first holding section rotatably holds the first film roll in which the first film is wound. The second holding section rotatably holds a second film roll, in which a second film is wound, for replacement with the first film roll. The connecting portion connects the first portion of the first film and the second portion of the second film. The cutting section includes a first predetermined location of the first film between the end of the first film and the first portion of the first film, and a second predetermined location between the starting end of the second film and the second portion of the second film. The second predetermined portion of the film is then cut together. The connecting portion and the cutting portion are fixedly arranged apart from each other.

In the film supply device of the first aspect, after the first film of the used film roll and the second film of the replacement film roll are connected, the first film is cut between the end thereof and the connection point with the second film. The second film is then cut between its starting end and the connection point with the first film. Therefore, in this film supply device, it is possible to reduce the length of the unnecessary portion of the second film that remains on the film sent to the film supply destination and may cause problems in film transport.

In addition, in the film supply device of the first aspect, since the cutting section cuts the first film and the second film together, compared to the case where the cutting section is provided independently for each of the first film and the second film, the cutting section cuts the first film and the second film together. The manufacturing cost of the device can be suppressed.

A film supply device according to a second aspect of the present invention is the film supply device according to the first aspect, and further includes a transport section. The conveyance unit conveys the connection film. The connecting film is the first film and the second film after being connected by the connecting portion. The conveyance unit moves the connecting film to the first portion so that the first portion of the first film and the second portion of the second film are brought closer to the cutting portion than when the first film and the second film are connected by the connecting portion. transport to position. The cutting unit cuts the first predetermined location of the first film and the second predetermined location of the second film together after the connection film is transported to the first position by the transport unit.

In the film supply device according to the second aspect, after the first film and the second film are connected, the connection point between the first film and the second film is brought close to the cutting part. Therefore, even if the connection part and the cutting part are arranged apart from each other, the length of the unnecessary part of the second film remaining on the connection film sent to the film supply destination can be reduced. Furthermore, with this film supply device, the length of the unnecessary portion of the first film remaining on the connection film sent to the film supply destination (the length between the first predetermined location and the first portion) can also be reduced.

A film supply device according to a third aspect of the present invention is the film supply device according to the second aspect, and further includes a film storage mechanism. The film storage mechanism includes a movable roller around which the first film is wound.

The film supply device according to the third aspect is provided with a film storage mechanism so that the connection point between the first film and the second film of the connection film approaches the cutting portion even if the device to which the film is supplied is stopped. It is easy to do.

The film supply device according to the fourth aspect of the present invention is the film supply device according to the first aspect, which connects the first film and the second film by the connecting portion, and connects the first film and the second film by the cutting portion. The cutting is done at the same time.

In the film supply device according to the fourth aspect, since the film is connected and cut at the same time, switching between a used film roll and a replacement film roll can be realized in a short time.

A film feeding device according to a fifth aspect of the present invention is the film feeding device according to any one of the first to fourth aspects, in which the connecting portion is connected to the first portion of the first film and the second portion of the second film. and heat weld. The film supply device further includes a cooling section. The cooling unit cools the first portion of the first film and the second portion of the second film that are connected by the connecting portion.

In the film supply device according to the fifth aspect, by cooling the connection point between the first film and the second film, the first film and the second film can be firmly fixed in a relatively short time. Therefore, even if a long waiting time is not provided after the connection, problems such as the first film and the second film becoming disconnected during transport of the film are less likely to occur.

A bag making and packaging machine according to a sixth aspect of the present invention includes the film supply device according to any one of the first to fifth aspects, and a bag making device. The bag-making device forms the film supplied by the film supply device into a cylindrical shape, and seals the film laterally to form a bag.

In the bag making and packaging machine according to the sixth aspect, it is possible to suppress the occurrence of film conveyance problems such as unnecessary portions of the second film becoming entangled with parts of the film supply device or the bag making device.

In the film supply device according to the present invention, it is possible to reduce the length of an unnecessary portion of the second film that remains on the film sent to the film supply destination and may cause problems in film transport.

1 is a schematic perspective view of a weighing bag-making and packaging system including a bag-making and packaging machine equipped with a film supply device according to an embodiment of the present invention. 2 is a schematic configuration diagram of the bag making and packaging machine shown in FIG. 1. FIG. 3 is a control block diagram of the bag making and packaging machine of FIG. 2. FIG. 3 is a diagram showing an example of a film used in the bag making and packaging machine of FIG. 2. FIG. 3 is a schematic perspective view of a film supply device of the bag making and packaging machine of FIG. 2. FIG. 6 is a perspective view of the holding mechanism support frame and its surroundings of the film supply device of FIG. 5. FIG. 7 is a cross-sectional perspective view showing the internal structure of a frame shaft that rotatably supports the holding mechanism support frame of FIG. 6. FIG. FIG. 6 is a side view of the main parts of the film feeding device of FIG. 5 with the second holding mechanism disposed at the film roll setting position. FIG. 6 is an enlarged side view of the main parts of the film supply device of FIG. 5 with the second holding mechanism disposed at the film roll standby position. FIG. 6 is a schematic plan view of the area around the frame shaft of the film supply device of FIG. 5 for explaining driving force transmission to the frame shaft, the first shaft, and the second shaft. 7 is a diagram for explaining the attitude detection mechanism of the holding mechanism support frame of FIG. 6. FIG. 7 is a diagram for explaining another example of the attitude detection mechanism of the holding mechanism support frame of FIG. 6. FIG. It is a drawing for explaining an example of the operation of the film supply device when switching the film roll to be used. It is a drawing for explaining an example of the operation of the film supply device when switching the film roll to be used. It is a drawing for explaining an example of the operation of the film supply device when switching the film roll to be used. It is a drawing for explaining an example of the operation of the film supply device when switching the film roll to be used. It is a drawing for explaining an example of the operation of the film supply device when switching the film roll to be used. It is a drawing for explaining an example of the operation of the film supply device when switching the film roll to be used. It is a flow chart for explaining an example of the operation of the film supply device when switching the film roll to be used. It is a flowchart for explaining another example of the operation of the film supply device when switching the film roll to be used.

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a film supply device of the present invention and an embodiment of a bag making and packaging machine equipped with the film supply device will be described with reference to the drawings. Note that the following embodiments are merely specific examples of the present invention, and do not limit the technical scope of the present invention. It will be understood that various changes may be made in form and detail without departing from the spirit and scope of the invention as claimed.

In addition, in the following explanation, expressions such as vertical, orthogonal, horizontal, vertical, etc. may be used to explain directions and positional relationships, but these are strictly vertical, orthogonal, horizontal, vertical, etc. It also includes cases where it is substantially perpendicular, perpendicular, horizontal, perpendicular, etc.

In addition, in the following explanation, expressions such as "front (front)", "rear (rear)", "top", "bottom", "left", "right", etc. are used to express directions etc. There is. Unless otherwise specified, "front", "rear", "top", "bottom", "left", and "right" here follow the directions of arrows attached to the drawings.

(1) Overall configuration A film supplying device 100 according to an embodiment of the film supplying device of the present invention, and a bag making and packaging machine 1000 according to an embodiment of the bag making and packaging machine of the present invention equipped with the film supplying device 100. The weighing bag making and packaging system 1 will be described with reference to FIGS. 1 to 5. FIG. 1 is a schematic perspective view of a measuring bag making and packaging system 1. FIG. 2 is a schematic configuration diagram of the bag making and packaging machine 1000. FIG. 3 is a control block diagram of the bag making and packaging machine 1000. FIG. 4 is a diagram showing an example of a film used in the bag making and packaging machine 1000. FIG. 5 is a schematic perspective view of the film supply device 100.

The weighing bag making and packaging system 1 mainly includes a combination weighing device 2000 and a bag making and packaging machine 1000 (see FIG. 1).

The bag making and packaging machine 1000 makes a bag-like packaging material from a sheet-like film F, and makes a bag B in which an article C is accommodated (see FIG. 2). The film F used here includes a printed surface Fa (see FIG. 4) that is disposed on the outer side when formed into the bag B, and a non-printed surface Fb on the back side of the printed surface Fa. Printing P is applied to the printing surface Fa as shown in FIG. No printing is performed on the non-printing surface Fb. The printing P is characters, figures, photographs, etc. printed for advertising and sales promotion of the article C as a product and for providing information regarding the article C. On the printing surface Fa, as shown in FIG. 4, in addition to the printing P, a registration mark M used for detecting the position of the film F is also printed. The article C is, for example, potato chips. However, the type of article C is not limited to potato chips, and may be other foods or foods other than foods. Article C is supplied from a combination weighing device 2000 installed above the bag making and packaging machine 1000 (see FIG. 2).

The bag making and packaging machine 1000 mainly includes a bag making device 200, a film supply device 100, and a control device 300 (see FIGS. 2 and 3). The control device 300 controls the operations of various devices of the bag making device 200 and the film supply device 100. The film supply device 100 holds a film roll FR around which a sheet-like film F is wound, and supplies the film F unwound from the film roll FR to the bag making device 200. The bag making device 200 forms the film F supplied by the film supply device 100 into a cylindrical shape, and laterally seals the cylindrically formed film F (cylindrical film Ft) to form a bag.

The film supply device 100 mainly includes a first holding mechanism 110a, a second holding mechanism 110b, a film feeding mechanism 116, and a tension adjustment mechanism 180 as mechanisms related to feeding the film F (see FIGS. 2 and 5). ). Each of the holding mechanisms 110a and 110b holds a film roll FR around which a sheet-like film F is wound (see FIG. 2). Specifically, the first holding mechanism 110a has a shaft 111a that rotatably holds the attached film roll FR, as shown in FIG. The second holding mechanism 110b has a shaft 111b that rotatably holds the attached film roll FR, as shown in FIG.

The film roll FR is obtained by winding a sheet-like film F as shown in FIG. 4 around a winding core (not shown). The end of the film F wound around the film roll FR on the core side is connected (fixed) to the core by, for example, being attached to the core with a tape (not shown) or bonded to the core with an adhesive. has been done.

The film feeding mechanism 116 rotates the respective shafts 111a and 111b of the plurality of holding mechanisms 110a and 110b independently of each other, and feeds out the film F from the film roll FR attached to the shafts 111a and 111b of each holding mechanism 110a and 110b. . The film feeding mechanism 116 includes a first holding mechanism motor 114a and a second holding mechanism motor 114b. The first holding mechanism motor 114a rotates the shaft 111a to feed out the film F from the film roll FR attached to the shaft 111a. The second holding mechanism motor 114b rotates the shaft 111b to feed out the film F from the film roll FR attached to the shaft 111b.

The bag making apparatus 200 mainly includes a former unit 210, a film conveyance belt 220, a vertical sealing mechanism 230, and a horizontal sealing mechanism 240 (see FIG. 2).

The bag making and packaging machine 1000 controls the operation of various components of the bag making apparatus 200 and the film supplying apparatus 100 by the control device 300, and thus makes a bag B containing an article C in the following flow. Manufacture. This will be explained with reference to FIGS. 2 and 5.

A sheet-like film F is supplied to the bag making apparatus 200 from a film roll FR held by one of the two holding mechanisms 110a and 110b of the film supply apparatus 100. When the sheet-like film F is supplied from the film roll FR attached to the first shaft 111a of the first holding mechanism 110a, the film F is fed out by the first holding mechanism motor 114a. When the sheet-like film F is supplied from the film roll FR attached to the second shaft 111b of the holding mechanism 110b, the film F is fed out by the second holding mechanism motor 114b. The sheet-like film F pulled out from the film roll FR is conveyed by the film conveyance belt 220 of the bag making device 200. The sheet-like film F transported to the bag making device 200 is guided by a plurality of rollers 170 including a movable roller 185 and a fixed roller 182 of a tension adjustment mechanism 180, which will be described later, and is transported to the former unit 210. In the tension adjustment mechanism 180, the movable roller 185 applies force to the film F to adjust the tension of the film F being conveyed. In the former unit 210, the sheet-like film F is formed into a cylindrical shape to become a cylindrical film Ft. The cylindrical film Ft is transported downward by a film transport belt 220, and the overlapping portions of the cylindrical film Ft are vertically sealed by a vertical sealing mechanism 230 arranged below the former unit 210. The cylindrical film Ft that has been sealed in the vertical direction (film transport direction) by the vertical sealing mechanism 230 is further transported downward by the film transport belt 220, and then transported by the horizontal sealing mechanism 240 disposed below the vertical sealing mechanism 230. It is sealed in a direction perpendicular to the transport direction of the cylindrical film Ft. Further, in the horizontal sealing mechanism 240, the horizontal sealing portion of the tubular film Ft is cut in the horizontal direction in the middle, and a bag B with the upper and lower ends sealed is produced. Note that the article C supplied by the combination weighing device 2000 is placed inside the cylindrical film Ft serving as the bag B before the upper end of the cylindrical film Ft is sealed by the horizontal sealing mechanism 240. The bag B containing the article C produced by the bag making and packaging machine 1000 is conveyed to a downstream process by, for example, a conveyor (not shown) disposed below the horizontal sealing mechanism 240.

(2) Detailed configuration of bag making and packaging machine The bag making device 200, film supply device 100, and control device 300 of the bag making and packaging machine 1000 will be described in detail.

(2-1) Bag-making device The former unit 210, film conveyance belt 220, vertical sealing mechanism 230, and horizontal sealing mechanism 240 of the bag-making device 200 will be explained.

(2-1-1) Former unit The former unit 210 mainly includes a former main body 212 and a tube 214 (see FIG. 2).

The former main body 212 is arranged so as to surround the cylindrical tube 214. The former main body 212 bends the sheet-like film F conveyed to the former main body 212 so that the left end and the right end of the film F overlap to form it into a cylindrical shape. The formed cylindrical film Ft is guided so as to wrap around the lower outer peripheral surface of the cylindrical tube 214, and is conveyed downward while being wrapped around the tube 214.

The tube 214 is a cylindrical member that extends vertically and has open upper and lower ends. The tube 214 receives the falling article C through its upper opening (see FIG. 2). The article C introduced from the upper opening of the tube 214 passes through the inside of the tube 214 and is supplied to the inside of the cylindrical film Ft from the lower opening of the tube 214.

(2-1-2) Film Conveyance Belt The bag making device 200 has a pair of film conveyance belts 220. A pair of film transport belts 220 are arranged below the former unit 210 (see FIG. 2). A pair of film transport belts 220 are arranged on the left and right sides of the tube 214 around which the cylindrical film Ft is wound, respectively. In FIG. 2, only the film transport belt 220 on the right side is depicted.

A pair of film transport belts 220 transport the film F pulled out from the film roll FR to the former main body 212. Further, the film conveyance belt 220 conveys the cylindrical film Ft formed by the former body 212 to the horizontal sealing mechanism 240. The film conveyance belt 220 attracts the cylindrical film Ft and conveys it downward.

Each film transport belt 220 has a drive roller 222, a driven roller 224, and a belt 226, as shown in FIG. The belt 226 has an adsorption function. The belt 226 is wound around the drive roller 222 and the driven roller 224. The drive roller 222 is connected to a motor (not shown) and driven by the motor. When the drive roller 222 is driven with the belt 226 adsorbing the film, the cylindrical film Ft is conveyed downward.

(2-1-3) Vertical sealing mechanism The vertical sealing mechanism 230 vertically seals the overlapping portion of the cylindrical film Ft wound around the tube 214 (seals in the vertical direction).

The vertical sealing mechanism 230 includes a heater, a heater belt that contacts the overlapping portion of the cylindrical film Ft, and a drive mechanism that drives the heater belt (not shown). The heater heats the heater belt. The drive mechanism drives the heater belt in the front-back direction so as to approach the tube 214 or move away from the tube 214. When the heat belt is driven close to the tube 214 by the drive mechanism, the overlapping portion of the cylindrical film Ft wound around the tube 214 is sandwiched between the heater belt and the tube 214. The vertical sealing mechanism 230 heat-seals the overlapping portion of the cylindrical film Ft in the vertical direction by pressing the overlapping portion of the cylindrical film Ft against the tube 214 with a heated heater belt.

(2-1-4) Horizontal sealing mechanism The horizontal sealing mechanism 240 is arranged below the film conveying belt 220 and the vertical sealing mechanism 230 (see FIG. 2). The horizontal sealing mechanism 240 horizontally seals the vertically sealed cylindrical film Ft that is conveyed downward by the film conveying belt 220. In other words, the horizontal sealing mechanism 240 seals the cylindrical film Ft in a direction perpendicular to the transport direction of the cylindrical film Ft.

The lateral sealing mechanism 240 includes a pair of rotating bodies 242 arranged at the front and rear of the cylindrical film Ft (see FIG. 2). Seal jaws 244a and seal jaws 244b each having a built-in heater are attached to each rotating body 242 (see FIG. 2). The sealing jaws 244a of both rotating bodies 242 function as a pair when horizontally sealing the cylindrical film Ft. Moreover, the sealing jaws 244b of both rotating bodies 242 function as a pair when horizontally sealing the cylindrical film Ft. The pair of sealing jaws 244a and the pair of sealing jaws 244b alternately horizontally seal the cylindrical film Ft being conveyed.

The horizontal sealing of the cylindrical film Ft by the sealing jaws 244a will be explained. When a drive mechanism (not shown) is driven and the pair of rotating bodies 242 rotate, the seal jaws 244a attached to each rotating body 242 rotate while drawing mutually symmetrical trajectories in side view. The pair of rotating seal jaws 244a sandwich the cylindrical film Ft while pressing against each other, and apply pressure and heat to the upper and lower ends of the bag B of the cylindrical film Ft to horizontally seal them. A cutter (not shown) is built into one side of the seal jaw 244a. The cutter cuts the horizontally sealed portion of the cylindrical film Ft at an intermediate position in the transport direction of the cylindrical film Ft, and separates the bag B from the subsequent cylindrical film Ft.

The lateral sealing of the cylindrical film Ft by the sealing jaws 244b is the same as the lateral sealing of the cylindrical film Ft by the sealing jaws 244a, so a description thereof will be omitted.

(2-2) Film Supply Device The film supply device 100 will be described with reference mainly to FIGS. 2 to 12.

FIG. 6 is a perspective view of the holding mechanism support frame 120 and its surroundings of the film supply device 100. FIG. 7 is a cross-sectional perspective view showing the internal structure of the frame shaft 130 that rotatably supports the holding mechanism support frame 120. FIG. 8 is a side view of the main parts of the film supply device 100 in a state where the second holding mechanism 110b is placed at the film roll set position A1. FIG. 9 is an enlarged side view of the main parts of the film supply device 100 in a state where the second holding mechanism 110b is placed at the film roll standby position A3. FIG. 10 is a schematic plan view of the area around the frame shaft 130 of the film supply device 100 for explaining the transmission of driving force to the frame shaft 130, the first shaft 111a, and the second shaft 111b. FIG. 11A is a diagram illustrating a posture detection mechanism 400 for detecting the posture of the holding mechanism support frame 120. FIG. 11B is a diagram for explaining another example of the posture detection mechanism 400 for detecting the posture of the holding mechanism support frame 120. 12A to 12F are diagrams for explaining an example of the operation of the film supply device 100 when switching the film roll FR to be used. 12A to 12F show the operation of the film supply device 100 in chronological order.

The film supply device 100 supplies the film F wound around the film roll FR to the bag making device 200. In the film supply device 100, the film F fed out from the film roll FR is guided to the bag making device 200 by a plurality of rollers 170 arranged along the transport path of the film F. The plurality of rollers 170 include a fixed roller 182 and a movable roller 185 of the tension adjustment mechanism 180.

As shown in FIGS. 5 and 6, the film supply device 100 includes a first holding mechanism 110a, a second holding mechanism 110b, a holding mechanism support frame 120, a frame shaft 130, a moving mechanism 139, and a film feeding mechanism. 116. The film supply device 100 also includes a position adjustment mechanism 140 for the first holding mechanism 110a and a position adjustment mechanism 140 for the second holding mechanism 110b, as shown in FIGS. 8 and 9. The illustration of the position adjustment mechanism 140 for the first holding mechanism 110a is omitted. Further, the film supply device 100 has a film connection mechanism 160, as shown in FIGS. 8 and 9.

As shown in FIGS. 8 and 9, each position adjustment mechanism 140 mainly includes a first position adjustment sensor 142, a film temporary placement section 143, a temporary holding mechanism 144, and a position adjustment air nozzle 146. . The position adjustment mechanism 140 for the first holding mechanism 110a is configured to adjust the position of the film F wound around the film roll FR (replacement film roll FR) when the replacement film roll FR is attached to the first holding mechanism 110a. It is mainly used to adjust the position of the connecting part and the starting end of the film F. The position adjustment mechanism 140 for the second holding mechanism 110b is configured to adjust the position of the film F wound around the film roll FR (replacement film roll FR) when the replacement film roll FR is attached to the second holding mechanism 110b. It is mainly used to adjust the position of the connecting part and the starting end of the film F.

Here, for convenience of explanation below, the starting end, ending end, and connecting portion of the film F will be defined.

First, in the definition, when the film F of the film roll FR held by one of the first holding mechanisms 110a, 110b (hereinafter referred to as used film roll FR for convenience of explanation) is used up, the other holding mechanism 110a, 110b is used up. The case where the film F of the film roll FR to be held (hereinafter referred to as replacement film roll FR for convenience of explanation) is connected to the film F of the used film roll FR by a connection section 162 of the film connection mechanism 160, which will be described later. Suppose.

At this time, the portion of the film F of the replacement film roll FR that is connected to the film F of the used film roll FR by the connection portion 162 is referred to as the connection portion of the film F of the replacement film roll FR. Further, the portion of the film F of the used film roll FR that is connected to the connection portion of the film F of the replacement film roll FR by the connection portion 162 is referred to as the connection portion of the film F of the used film roll FR. The terminal end of the film F means the end of the film F wound around the film roll FR on the side connected to a winding core (not shown). Further, the starting end of the film F means the end of the film F wound around the film roll FR on the pull-out side (the side opposite to the side connected to the winding core).

For example, if FIG. 8 and FIG. 9 are taken as an example, the part indicated by the symbol F2L is the starting end of the film F of the replacement film roll FR. Taking FIG. 9 as an example, a portion indicated by the symbol F1T is the end of the film F of the used film roll FR. Moreover, if FIG. 9 is taken as an example, the part shown by the code|symbol F11 is the connection part of the film F of the used film roll FR. Moreover, if FIG.8 and FIG.9 is taken as an example, the part shown by the code|symbol F21 is the connection part of the film F of the replacement film roll FR.

The film connection mechanism 160 mainly includes a connection part 162, a first clamp 163, a second clamp 164, a knife 166, a pinch roller 168, a second position adjustment sensor 152, a third position adjustment sensor 154, and a cooling part 161. include. The film connecting mechanism 160 adjusts the connecting portion of the film F of the used film roll FR to an appropriate position when the film F of the film roll FR held by one of the holding mechanisms 110a and 110b is used up, and , 110a is mainly used to connect to the connecting portion of the film F of the replacement film roll FR held by the other one of the two.

Note that the position adjustment of the connection part of the film F of the replacement film roll FR by the position adjustment mechanism 140 and the position adjustment of the connection part of the film F of the used film roll FR by the film connection mechanism 160 are performed on the replacement film roll FR. This is done in order to prevent the printing P of the film F from being misaligned when the film F of the used film roll FR and the film F of the used film roll FR are connected by the connecting portion 162.

Each device, mechanism, and member of the film supply device 100 will be explained below.

Note that the film rolls FR held by the holding mechanisms 110a and 110b are the same type of film rolls in which the same type of sheet-like film F is wound. However, in the following, for convenience of explanation, the film roll held by the first holding mechanism 110a will be referred to as a first film roll FR1 around which the sheet-like first film F1 is wound, and the film roll held by the second holding mechanism 110b will be referred to as a first film roll FR1 around which the sheet-like first film F1 is wound. The FR may be called a second film roll FR2 around which the second film F2 is wound.

(2-2-1) Holding mechanism The first holding mechanism 110a rotatably holds the first film roll FR1 around which the sheet-like first film F1 is wound (see FIG. 8). The second holding mechanism 110b rotatably holds the second film roll FR2 around which the sheet-like second film F2 is wound (see FIG. 8).

The second holding mechanism 110b has a second shaft 111b (see FIG. 6). A second film roll FR2 is attached to the second shaft 111b. The second shaft 111b rotatably holds the attached second film roll FR2. The second shaft 111b is a cantilevered shaft with one end supported on the holding mechanism support frame 120 side. When the second shaft 111b is rotated by the second holding mechanism motor 114b, the second film roll FR2 rotates together with the second shaft 111b.

The second holding mechanism 110b includes a guide member 119 (see FIG. 5). The guide member 119 is configured to guide the second film F2 when the second film roll FR2 is attached to the second shaft 111b and the position of the connecting portion of the second film F2 wound around the second film roll FR2 is adjusted. The second film F2 is guided so that it is arranged along a predetermined path (see FIG. 8).

Further, the second holding mechanism 110b includes a film pressing mechanism 117 as shown in FIG. The film pressing mechanism 117 holds the second film F2 in position when the second film roll FR2 is attached to the second shaft 111b and the connecting portion of the second film F2 wound around the second film roll FR2 is aligned. The second film F2 is held down until the first film F1 and the second film F2 are connected to each other so that they do not shift. The film pressing mechanism 117 mainly includes a fixed roller 112 and a first air cylinder 118a having a movable roller 118 attached to the tip of a rod (see FIG. 8). When the first air cylinder 118a is driven and the movable roller 118 is pressed against the fixed roller 112, the first film F1 disposed between the movable roller 118 and the fixed roller 112 is It is held in between. In particular, the first film F1 is pressed between the movable roller 118 and the fixed roller 112a arranged at the center in the state depicted in FIG. 8 among the three fixed rollers 112 arranged side by side. Note that the mechanism for moving the movable roller 118 is not limited to an air cylinder, but may be a hydraulic cylinder or a motor.

The guide member 119, fixed roller 112, and first air cylinder 118a are attached to an arm 122b extending from the holding mechanism support frame 120 (see FIG. 8).

The first holding mechanism 110a has a first shaft 111a (see FIG. 6). The first film roll FR1 is attached to the first shaft 111a. The first shaft 111a rotatably holds the attached first film roll FR1. The first shaft 111a is a cantilevered shaft with one end supported on the holding mechanism support frame 120 side. When the first shaft 111a is rotated by the first holding mechanism motor 114a, the first film roll FR1 rotates together with the first shaft 111a. In addition, although detailed explanation is omitted to avoid duplication of explanation, the first holding mechanism 110a also has a guide member 119 and a guide member 119 having the same structure and function as the guide member 119 and film pressing mechanism 117 of the second holding mechanism 110b. It has a film pressing mechanism 117 (not shown).

Note that when the film roll FR held by the holding mechanisms 110a and 110b is used in the bag making apparatus 200 (when the holding mechanisms 110a and 110b are arranged at film supply positions A2 and A4, which will be described later), the film roll FR is The unwound film F is transported by the film transport belt 220 of the bag making device 200. The film F pulled out from the film roll FR is guided by a plurality of rollers 170 including the movable roller 185 and the fixed roller 182 of the tension adjustment mechanism 180, and is conveyed to the former unit 210 of the bag making apparatus 200 (see FIG. 2). ).

(2-2-2) Tension Adjustment Mechanism The tension adjustment mechanism 180 adjusts the magnitude of tension acting on the film F being transported. The tension adjustment mechanism 180 mainly includes a fixed roller 182, a movable roller mechanism 184, a shaft 184a, a third air cylinder 187, and an encoder 188 (see FIGS. 3 and 8). The movable roller mechanism 184 includes a movable roller 185 and a pair of arms 186 (see FIG. 8). Arm 186 is a member that supports movable roller 185. The pair of arms 186 are arranged on the left and right sides of the movable roller 185 so as to sandwich the movable roller 185 extending in the left-right direction, and support the left and right ends of the movable roller 185. Each arm 186 is rotatably supported by a shaft 184a extending in the left-right direction. The tip of the rod (not shown) of the third air cylinder 187 is connected to an arm (not shown) extending radially from the shaft 184a. By driving the third air cylinder 187, a force that rotates the shaft 184a acts on the shaft 184a.

The fixed roller 182 and the movable roller 185 are arranged on the conveyance path of the film F that is fed out from the film roll FR. The fixed roller 182 and the movable roller 185 are arranged between the film roll FR and the former main body 212 in the transport direction of the film F during normal operation of the bag making and packaging machine 1000 (see FIG. 2). Fixed roller 182 and movable roller 185 are both rotatable. Fixed roller 182 and movable roller 185 both extend in the left-right direction. The fixed roller 182 is fixed to a frame (not shown) of the bag making and packaging machine 1000, and its position is immovable. On the other hand, the movable roller 185 is fixed to the arm 186 which is rotatable around the axis of the shaft 184a as described above, and its position changes (that is, it is movable) by the movement of the arm 186.

The fixed roller 182 and the movable roller 185 contact the film F conveyed from the film roll FR and guide the film F. The film F is fixed so that it comes into contact with the film F in the order of the fixed roller 182, the movable roller 185, the fixed roller 182, the movable roller 185, and the fixed roller 182 from the upstream side when the film F is conveyed from the film roll FR to the bag making apparatus 200. It is wound around a roller 182 and a movable roller 185 (see FIG. 8). The fixed roller 182 contacts the lower surface (printing surface Fa) of the film F being transported, and the movable roller 185 contacts the upper surface (non-printing surface Fb) of the film F being transported. and is wound around a movable roller 185 (see FIG. 8).

Note that when the arm 186 rotates and the position of the movable roller 185 changes, the length of the transport path of the film F in the tension adjustment mechanism 180 changes. Specifically, when the arm 186 rotates downward and the movable roller 185 moves downward, the length of the conveyance path of the film F in the tension adjustment mechanism 180 becomes longer. As a result, in the tension adjustment mechanism 180, the film F can be stored by moving the movable roller 185 downward. In other words, the tension adjustment mechanism 180 functions as a film storage mechanism.

The movable roller 185 in contact with the upper surface of the film F pushes the film F downward by the resultant force of the weight of the movable roller mechanism 184 and the force generated by the third air cylinder 187 to rotate the shaft 184a. As a result, the movable roller 185 applies tension to the film F. In the tension adjustment mechanism 180, the force with which the movable roller 185 pushes the film F downward changes by controlling the operation of the third air cylinder 187, and the tension acting on the film F changes.

Note that an encoder 188 (see FIG. 3) for detecting the rotation angle of the shaft 184a is attached to one end of the shaft 184a. The detection result of the encoder 188 is used by the control device 300 to control the position of the movable roller 185. Further, the detection result of the encoder 188 can also be used to detect the end of the film roll FR. Note that detection of the end of the film roll FR means detection of a state in which all the films F of the film roll FR used for bag making are unwound. Furthermore, the detection result of the encoder 188 can also be used to calculate the transport distance of the film F.

When the film F is conveyed during operation of the bag making and packaging machine 1000, the control device 300 controls the shafts 111a of the holding mechanisms 110a and 110b that hold the film roll FR from which the film F is fed out based on the detection result of the encoder 188. , 111b to control the position of the movable roller 185 that guides the film F to a predetermined position. For example, if the film roll FR from which the film F is fed out is the first film roll FR1, the control device 300 adjusts the rotational speed of the shaft 111a of the first holding mechanism 110a that holds the first film roll FR1. The position of the movable roller 185 that guides the first film F1 is controlled to a predetermined position.

(2-2-3) Holding Mechanism Support Frame In this embodiment, the holding mechanism support frame 120 supports the first holding mechanism 110a and the second holding mechanism 110b.

An arm 122a and an arm 122b extend from the holding mechanism support frame 120. A guide member 119, a fixed roller 112 of the film pressing mechanism 117, and a first air cylinder 118a are attached to the arm 122b. Similarly to the arm 122b, the arm 122a is also attached with a guide member 119, the fixed roller 112 of the film pressing mechanism 117, and the first air cylinder 118a (not shown).

(2-2-4) Frame Shaft The frame shaft 130 rotatably supports the holding mechanism support frame 120.

As the holding mechanism support frame 120 rotates around the central axis of the frame shaft 130, the first shaft 111a of the first holding mechanism 110a and the second shaft 111b of the second holding mechanism 110b rotate around the central axis of the frame shaft 130. Rotate. Furthermore, as the holding mechanism support frame 120 rotates around the central axis of the frame shaft 130, the arms 122a and 122b of the holding mechanism support frame 120 also rotate around the central axis of the frame shaft 130. Note that even if the holding mechanism support frame 120 rotates around the central axis of the frame shaft 130, the relative positional relationship between the first shaft 111a of the first holding mechanism 110a and the arm 122a of the holding mechanism support frame 120 changes. do not. Furthermore, even if the holding mechanism support frame 120 rotates around the central axis of the frame shaft 130, the relative positional relationship between the second shaft 111b of the second holding mechanism 110b and the arm 122b of the holding mechanism support frame 120 changes. do not.

The frame shaft 130 has a three-layer shaft structure. The frame shaft 130 has a first layer shaft 132 with the largest diameter disposed on the outermost layer, a third layer shaft 136 with the smallest diameter disposed on the innermost layer, the first layer shaft 132 and the third layer shaft 136. and a second layer shaft 134 disposed between them (see FIG. 7). The first layer shaft 132, the second layer shaft 134, and the third layer shaft 136 are each independently rotatable.

The first layer shaft 132 is a shaft for rotating the holding mechanism support frame 120. One end of the first layer shaft 132 is fixed to the holding mechanism support frame 120. When the first layer shaft 132 is rotated by the moving mechanism 139, the holding mechanism support frame 120 rotates.

The second layer shaft 134 is a shaft for rotating the second shaft 111b of the second holding mechanism 110b. When the second layer shaft 134 is rotated by the film feeding mechanism 116, the second shaft 111b of the second holding mechanism 110b rotates. Specifically, when the second layer shaft 134 is rotated by the second holding mechanism motor 114b of the film feeding mechanism 116, the second shaft 111b of the second holding mechanism 110b rotates.

The third layer shaft 136 is a shaft for rotating the first shaft 111a of the first holding mechanism 110a. When the third layer shaft 136 is rotated by the film feeding mechanism 116, the first shaft 111a of the first holding mechanism 110a rotates. Specifically, when the third layer shaft 136 is rotated by the first holding mechanism motor 114a of the film feeding mechanism 116, the first shaft 111a of the first holding mechanism 110a rotates.

(2-2-5) Moving mechanism The moving mechanism 139 moves the first holding mechanism 110a and the second holding mechanism 110b between the film roll set position A1 and the film supply position A2 by rotating the holding mechanism support frame 120. move between. Furthermore, the moving mechanism 139 rotates the holding mechanism support frame 120 to move one of the first holding mechanism 110a and the second holding mechanism 110b to the film roll standby position A3, and moves the first holding mechanism 110a and the second holding mechanism 110b is moved to the film supply position A4. Note that the film roll set position A1 is the position where the second holding mechanism 110b is located in FIG. The film supply position A2 is the position where the first holding mechanism 110a is located in FIG. The film roll standby position A3 is the position where the second holding mechanism 110b is located in FIGS. 2 and 9. Film supply position A4 is the position where the first holding mechanism 110a is located in FIG. The film roll standby position A3 is a position rotated by a predetermined angle (for example, 45°) counterclockwise around the central axis of the frame shaft 130 from the film roll set position A1 when viewed from the right side. The film supply position A2 is a position rotated by a predetermined angle (for example, 135°) counterclockwise around the central axis of the frame shaft 130 from the film roll standby position A3 when viewed from the right side. Further, the film supply position A4 is a position rotated by a predetermined angle (for example, 45°) counterclockwise around the central axis of the frame shaft 130 from the film supply position A2 when viewed from the right side.

The film roll set position A1 is a position where the film roll FR is mounted on the shafts 111a and 111b of the holding mechanisms 110a and 110b. In the present bag making and packaging machine 1000, the film roll FR is mounted on shafts 111a and 111b arranged at the same position for both the first holding mechanism 110a and the second holding mechanism 110b.

The film supply positions A2 and A4 are positions where the film F supplied to the bag making device 200 is fed out from the film roll FR mounted on the shafts 111a and 111b during normal operation of the bag making and packaging machine 1000.

The film roll standby position A3 is a position where the first holding mechanism 110a to which the first film roll FR1 is attached at the film roll set position A1 waits until the second film F2 of the second film roll FR2 is used up. Further, the film roll standby position A3 is a position where the second holding mechanism 110b to which the second film roll FR2 is attached at the film roll set position A1 waits until the first film F1 of the first film roll FR1 is used up. .

Further, in the film roll standby position A3, the connecting portion F21 of the second film F2 of the replacement second film roll FR2 held by the second holding mechanism 110b is connected to the connecting portion F21 of the second film F2 held by the first holding mechanism 110a. This is the position where the second holding mechanism 110b is placed when it is connected to the first film F1 of the completed first film roll FR1. That is, when the second holding mechanism 110b is moved to the film roll standby position A3, the connecting portion F21 of the second film F2 of the replacement second film roll FR2 is connected to the first film F1 by the connecting portion 162. position (connection position). Further, at the film roll standby position A3, the connection portion (not shown) of the first film F1 of the replacement first film roll FR1 held by the first shaft 111a of the first holding mechanism 110a is connected to the connection portion 162. This is the position where the first holding mechanism 110a is placed when connected to the second film F2 of the used second film roll FR2 held by the second holding mechanism 110b. That is, when the first holding mechanism 110a is moved to the film roll standby position A3, the connecting portion of the first film roll FR1 for replacement is at a position where it is connected to the second film F2 by the connecting portion 162. (connected position).

The structure of the moving mechanism 139 will be explained. The moving mechanism 139 mainly includes a frame rotation motor 138 and a frame rotation transmission mechanism 137, as shown in FIGS. 3 and 5. The frame rotation motor 138 rotates the holding mechanism support frame 120. The frame rotation transmission mechanism 137 transmits the driving force of the frame rotation motor 138 to the first layer shaft 132 of the frame shaft 130.

As shown in FIG. 10, the frame rotation transmission mechanism 137 includes a belt 137a, a driving roller 137b, and a driven roller 137c. The belt 137a is wound around a driving roller 137b and a driven roller 137c. The drive roller 137b is connected to and driven by the frame rotation motor 138. The driven roller 137c is connected to one end of the first layer shaft 132 of the frame shaft 130 (the end of the first layer shaft 132 on the side that is not connected to the holding mechanism support frame 120). When the frame rotation motor 138 is driven, the drive roller 137b rotates, the driven roller 137c rotates via the belt 137a, and as a result, the first layer shaft 132 rotates. As a result of the rotation of the first layer shaft 132, the holding mechanism support frame 120 is rotated, and the first holding mechanism 110a and the second holding mechanism 110b are moved around the frame shaft 130.

Note that detection of the posture of the holding mechanism support frame 120 rotated by the moving mechanism 139 can be realized at low cost, for example, by the following posture detection mechanism 400.

As shown in FIG. 11A, the posture detection mechanism 400 includes a first member 402 and a second member 404 fixed to the end of the first layer shaft 132, and two photoelectric sensors 408A and 408B. The first member 402 and the second member 404 rotate with the first layer shaft 132. When the end of the first layer shaft 132 to which the first member 402 is attached is viewed in the axial direction, the first member 402 has a semicircular shape with a radius R1 centered on the rotation axis O of the first layer shaft 132. is formed. When the end of the first layer shaft 132 to which the second member 404 is attached is viewed in the axial direction, the second member 404 has a radius R2 (> R1), the inner peripheral side is surrounded by an arc of radius R1 centered on the rotation axis O of the first layer shaft 132, and these arcs are two straight lines extending longitudinally with respect to the rotation axis O. It has a shape as shown in FIG. 11A, which is connected by . In other words, the second member 404 has a semicircle with a radius R1 centered on the rotational axis O of the first layer shaft 132 removed from a semicircle with a radius R2 centered on the rotational axis O of the first layer shaft 132. It is the shape. The second member 404 and the first member 402 are fixed to the end of the first layer shaft 132 with a 90° phase shift around the rotation axis O.

The photoelectric sensor 408A is located at a distance K1 (K1<R1) from the rotation axis O when the end of the first layer shaft 132 to which the first member 402 is attached is viewed from the side. Detect presence. When the end of the first layer shaft 132 to which the second member 404 is attached is viewed from the side, the photoelectric sensor 408B is arranged on a straight line connecting the rotation axis O and the photoelectric sensor 408A, and is The presence of the second member 404 is detected at a position separated by a distance K2 (R1<K2<R2). The positions of the two photoelectric sensors 408A and 408B do not change due to the rotation of the first layer shaft 132.

When the first member 402 and the second member 404 detect the members 402 and 404 using the two photoelectric sensors 408A and 408B as shown in FIG. 11A, the rotation angle of the first layer shaft 132 causes the photoelectric sensor 408A to , 408B, a state where both photoelectric sensors 408A, 408B detect a member, and a state where both photoelectric sensors 408A, 408B do not detect a member. arranged to occur. Then, by using a combination of the detection results of the photoelectric sensors 408A and 408B, it is possible to detect the rough rotation angle of the first layer shaft 132, in other words, the attitude of the holding mechanism support frame 120. Note that the number of photoelectric sensors included in the posture detection mechanism 400 and the number of members detected by the photoelectric sensor is not limited to two, and if the number of photoelectric sensors and the number of members detected by the photoelectric sensor is increased, the holding mechanism can be detected with higher accuracy. The attitude of the support frame 120 can be detected.

Note that when detecting the attitude of the holding mechanism support frame 120 using the attitude detection mechanism 400 as shown in FIG. 11A, one of the photoelectric sensors 408A and 408B may fail. If the detection results of the malfunctioning photoelectric sensors 408A and 408B are used to detect the attitude of the holding mechanism support frame 120, the attitude of the holding mechanism support frame 120 may be erroneously detected. If the posture of the holding mechanism support frame 120 is erroneously detected, there is a risk that the holding mechanism support frame 120 will be rotated excessively and problems such as the film F being wound around the holding mechanism support frame 120 or the like may occur. Therefore, when the control device 300, which will be described later, detects the attitude of the holding mechanism support frame 120 using the detection results of the photoelectric sensors 408A and 408B, it detects a failure of the photoelectric sensors 408A and 408B using the following method.

In the attitude detection mechanism 400, the photoelectric sensor 408A changes from the state shown in FIG. When the sensor rotates 180° counterclockwise, it switches to a non-detection state. Further, in the attitude detection mechanism 400, the photoelectric sensor 408B changes from the state shown in FIG. When the shaft 132 rotates 180° counterclockwise, the sensing state is switched. Therefore, if both the photoelectric sensors 408A and 408B are normal, the photoelectric sensor 408A will switch from the non-detection state to the detection state once while the photoelectric sensor 408B changes from the non-detection state to the detection state and returns to the non-detection state. Change. Furthermore, if both the photoelectric sensors 408A and 408B are normal, the photoelectric sensor 408B switches from the non-detection state to the detection state once while the photoelectric sensor 408A changes from the detection state to the non-detection state and returns to the detection state. . Therefore, the control device 300 can understand that the photoelectric sensor 408A and the photoelectric sensor 408B are normal based on the detection results of the photoelectric sensors 408A and 408B. If this detection method is used, the control device 300 can detect an abnormality in the photoelectric sensors 408A, 408B while the first layer shaft 132 is turned half a rotation at maximum, such as when the film F is wrapped around the other film roll FR. The occurrence of defects can be suppressed. Note that if the control device 300 determines that one of the photoelectric sensors 408A and 408B is not normal, the control device 300 stops the film supply device 100, for example.

Note that to detect the attitude of the holding mechanism support frame 120 rotated by the moving mechanism 139, the attitude detection mechanism 400 in which the first member 402 is divided into two parts and arranged as shown in FIG. 11B may be used, for example. . The same attitude detection principle as described above can be used to detect the attitude of the holding mechanism support frame 120. Furthermore, the same failure detection principle as described above can be used to detect failures of the photoelectric sensors 408A and 408B.

(2-2-6) Film feeding mechanism The film feeding mechanism 116 rotates the respective shafts 111a and 111b of the plurality of holding mechanisms 110a and 110b to remove the film from the film roll FR attached to the shafts of the plurality of holding mechanisms. The film F is fed out independently. The film feeding mechanism 116 is configured to be able to change the feeding speed of the film F from the film roll FR during the bag making and packaging operation in the bag making apparatus 200.

The film feeding mechanism 116 includes a first holding mechanism motor 114a, a second holding mechanism motor 114b, a first transmission mechanism 115a, a second transmission mechanism 115b, a third transmission mechanism 115c, and a fourth transmission mechanism 115d. and, including.

The first holding mechanism motor 114a rotates the first shaft 111a of the first holding mechanism 110a. The first holding mechanism motor 114a is preferably a servo motor. The first transmission mechanism 115a transmits the driving force of the first holding mechanism motor 114a to the third layer shaft 136 of the frame shaft 130. The second transmission mechanism 115b transmits the driving force transmitted to the third layer shaft 136 of the frame shaft 130 to the first shaft 111a.

Note that the first transmission mechanism 115a includes a belt 115a1, a driving roller 115a2, and a driven roller 115a3. The belt 115a1 is wound around a driving roller 115a2 and a driven roller 115a3. The drive roller 115a2 is connected to the first holding mechanism motor 114a and is driven by the first holding mechanism motor 114a. The driven roller 115a3 is connected to one end of the third layer shaft 136 of the frame shaft 130. When the first holding mechanism motor 114a is driven, the drive roller 115a2 rotates, the driven roller 115a3 rotates via the belt 115a1, and the third layer shaft 136 rotates.

The second transmission mechanism 115b includes a belt 115b1, a driving roller 115b2, and a driven roller 115b3. The belt 115b1 is wound around a driving roller 115b2 and a driven roller 115b3. The drive roller 115b2 is connected to one end of the third layer shaft 136 of the frame shaft 130 (the end opposite to the side to which the driven roller 115a3 is connected), and when the third layer shaft 136 rotates, the drive roller 115b2 It also rotates. The driven roller 115b3 is connected to one end (the end supported by the holding mechanism support frame 120) of the first shaft 111a of the first holding mechanism 110a. When the third layer shaft 136 rotates, the drive roller 115b2 rotates, the driven roller 115b3 rotates via the belt 115b1, and the first shaft 111a rotates. As a result, the first film F1 is unwound from the first film roll FR1 attached to the first shaft 111a.

The second holding mechanism motor 114b rotates the second shaft 111b of the second holding mechanism 110b. The second holding mechanism motor 114b is preferably a servo motor. The third transmission mechanism 115c transmits the driving force of the second holding mechanism motor 114b to the second layer shaft 134 of the frame shaft 130. The fourth transmission mechanism 115d transmits the driving force transmitted to the second layer shaft 134 of the frame shaft 130 to the second shaft 111b.

Note that the third transmission mechanism 115c includes a belt 115c1, a driving roller 115c2, and a driven roller 115c3. The belt 115c1 is wound around a driving roller 115c2 and a driven roller 115c3. The drive roller 115c2 is connected to the second holding mechanism motor 114b and is driven by the second holding mechanism motor 114b. The driven roller 115c3 is connected to one end of the second layer shaft 134 of the frame shaft 130. When the second holding mechanism motor 114b is driven, the drive roller 115c2 rotates, the driven roller 115c3 rotates via the belt 115c1, and the second layer shaft 134 rotates.

The fourth transmission mechanism 115d includes a belt 115d1, a driving roller 115d2, and a driven roller 115d3. The belt 115d1 is wound around a driving roller 115d2 and a driven roller 115d3. The drive roller 115d2 is connected to one end of the second layer shaft 134 of the frame shaft 130 (the end opposite to the side to which the driven roller 115c3 is connected), and when the second layer shaft 134 rotates, the drive roller 115d2 It also rotates. The driven roller 115d3 is connected to one end (the end supported by the holding mechanism support frame 120) of the second shaft 111b of the second holding mechanism 110b. When the second layer shaft 134 rotates, the drive roller 115d2 rotates, the driven roller 115d3 rotates via the belt 115d1, and the second shaft 111b rotates. As a result, the second film F2 is fed out from the second film roll FR2 attached to the second shaft 111b.

(2-2-7) Connection part The connection part 162 connects the first film F1 wound around the first film roll FR1 held by the first holding mechanism 110a and the second film roll held by the second holding mechanism 110b. This is a mechanism that connects the second film F2 wound around the FR2. The connecting portion 162 sandwiches the first film F1 and the second film F2 with the guide member 119, heats the first film F1 and the second film F2 under pressure with a heater (not shown), and thermally welds the first film F1 and the second film F2. It is a mechanism. However, the connection method using the connecting portion 162 is not limited to thermal welding, and the first film F1 and the second film F2 may be connected by ultrasonic welding.

Note that when the first film F1 of the first film roll FR1 is used up, the connecting portion 162 connects with the connecting portion F11 of the first film F1 wound around the first film roll FR1 held by the first holding mechanism 110a. , and the connecting portion F21 of the second film F2 wound around the second film roll FR2 held by the second holding mechanism 110b. Further, when the second film F2 of the second film roll FR2 is used up, the connecting portion 162 is connected to the connecting portion of the second film F2 wound around the second film roll FR2 held by the second holding mechanism 110b (see FIG. (not shown) and a connecting portion (not shown) of the first film F1 wound around the first film roll FR1 held by the first holding mechanism 110a.

(2-2-8) Connection position adjustment mechanism The position adjustment mechanism 140 is used to adjust the connection position when the replacement film roll FR is attached to the first holding mechanism 110a or the second holding mechanism 110b. This mechanism is mainly used to adjust the position of the connecting portion of the film F and the vicinity of the starting end of the film F. The position adjustment mechanism 140 includes a first position adjustment sensor 142, a temporary film placement section 143, a temporary holding mechanism 144, and a position adjustment air nozzle 146 (see FIG. 8).

(2-2-8-1) First position adjustment sensor The first position adjustment sensor 142 connects the replacement film roll to the shafts 111a and 111b of the holding mechanisms 110a and 110b arranged at the film roll set position A1. This sensor detects that the connecting portion of the film F is located at the normal position when the FR is attached and the connecting portion of the film F wound around the film roll FR is set at the normal position. Note that the normal position of the connecting portion of the film F means that when the holding mechanisms 110a and 110b in which the film roll FR is set are moved to the film roll standby position A3 by the moving mechanism 139, the connecting portion of the film F is in the connecting portion. 162. The first position adjustment sensor 142 may directly detect that the connecting portion of the film F is located at the normal position, or the first position adjustment sensor 142 may directly detect that the connecting portion of the film F is located at the target position (portions other than the connecting portion). It may be detected that the connecting portion of the film F is located at a normal position when a predetermined position of the film F is present at that position.

The first position adjustment sensor 142 is, for example, a registration mark sensor that detects a registration mark M printed on the printing surface Fa of the film F. Here, the first position adjustment sensor 142 detects that the registration mark M is located at the target position (the detection position of the first position adjustment sensor 142), and based on the detection result, the first position adjustment sensor 142 detects the connection portion of the film F. detects that it is located at the normal position.

Note that the type of the first position adjustment sensor 142 is not limited to a registration mark sensor, and may be a sensor using a camera, for example. For example, the connection portion position adjustment sensor may detect that the connection portion of the film F is located at a normal position based on the position of the print P on the print surface Fa of the film F that is imaged by a camera.

(2-2-8-2) Film temporary storage unit The film temporary storage unit 143 is used when the operator of the bag making and packaging machine 1000 attaches a replacement film roll FR to the shafts 111a and 111b of the holding mechanisms 110a and 110b. In this case, the vicinity of the connecting portion of the film F pulled out from the replacement film roll FR is a member temporarily placed manually. The film temporary storage section 143 has a temporary storage surface 143a on which the film F is temporarily placed.

Taking as an example the setting work of the film F (second film F2) performed by the operator of the bag making and packaging machine 1000 when attaching the replacement film roll FR (second film roll FR2) to the second holding mechanism 110b, the film temporary The contents related to the storage section 143 will be further explained. Note that the setting work of the film F (first film F1) performed when attaching the replacement film roll FR (first film roll FR1) to the first holding mechanism 110a is the same as the setting work of the second film F2. Therefore, the explanation will be omitted.

After installing the replacement second film roll FR2 on the second holding mechanism 110b, the operator of the bag making and packaging machine 1000 moves the second film F2 so that the second film F2 of the second film roll FR2 passes through a predetermined path. to guide you. Specifically, after the operator attaches the second film roll FR2 to the second shaft 111b, the second film F2 pulled out from the second film roll FR2 extends along the upper surface of the guide member 119, and the film pressing mechanism The second film F2 is guided so as to pass between the fixed roller 112 of 117 and the movable roller 118. Further, the operator manually temporarily places the film F pulled out from the film roll FR near the connecting portion on the temporary placement surface 143a of the film temporary placement section 143. For example, the operator sets the registration mark M printed on the printing surface F2a of the second film F2 near the starting end F2L of the second film F2 so that it is placed within a predetermined position range of the film temporary storage section 143. 2 film F2 is temporarily placed on the temporary placement surface 143a of the temporary film placement section 143. The position of the film temporary storage section 143 is such that, for example, when attaching the second film roll FR2 to the second holding mechanism 110b, the registration mark M printed on the printing surface F2a of the second film F2 is placed in the film temporary storage section 143. If the second film F2 is temporarily placed within a predetermined position range, the connecting portion F21 of the second film F2 will be located upstream of the normal position and within the normal position on the transport path along which the second film F2 is transported by the second holding mechanism motor 114b. It is designed to be placed within a predetermined position range with respect to the position.

In addition, as shown in FIG. 8, the film F pulled out from the film roll FR of the holding mechanisms 110a and 110b arranged at the film roll set position A1 has a non-printing surface Fb (in FIG. 8, the non-printing surface Fb of the second film F2). The film is temporarily placed in the film temporary placement section 143 with the surface F2b) facing the temporary placement surface 143a of the film temporary placement section 143. In other words, in this embodiment, the printed surface Fa of the film F pulled out from the film roll FR placed at the film roll set position A1 faces upward (the side visible to the operator), as shown in FIG. In this state, the film is temporarily placed in the temporary film storage section 143. Therefore, it is easy for the operator to temporarily place the registration mark M at a predetermined position in the film temporary storage section 143.

Note that if the length of the film F extending backward from the film temporary storage section 143 is too long when the film F is temporarily placed, in order to prevent the film F from getting tangled with equipment in the film supply device 100, A part of the film F on the rear side of the film temporary storage section 143 may be cut manually or automatically.

(2-2-8-3) Temporary holding mechanism The temporary holding mechanism 144 is arranged near the film temporary holding section 143. The temporary holding mechanism 144 is a mechanism that temporarily holds the film F in order to prevent the film F from shifting when the film F is temporarily placed on the film temporary holding section 143. Note that the temporary holding mechanism 144 temporarily holds the film F with a force sufficient to transport the film F when the film F is transported by the holding mechanism motors 114a and 114b as described later. Although not limited to this, the temporary holding mechanism 144 temporarily holds the film F using the force of an elastic member such as a spring. The temporary holding mechanism 144 may be operated manually, or may be driven to automatically hold temporarily by operating a button or the like.

(2-2-8-4) Position adjustment air nozzle The position adjustment air nozzle 146 is used when moving the holding mechanisms 110a and 110b from the film roll set position A1 to the film roll standby position A3. When moving the connecting portion of the film F to the connecting position by the connecting portion 162, air is blown near the starting end of the film F of the replacement film roll FR to adjust the position of the portion near the starting end of the film F. The blowing of air from the position adjustment air nozzle 146 is controlled by a position adjustment air solenoid valve 146a (see FIG. 3).

For example, positional adjustment near the starting end of the film F by the position adjusting air nozzle 146 will be explained using the positional adjustment near the starting end of the second film F2 as an example.

In order to move the second holding mechanism 110b from the film roll set position A1 to the film roll standby position A3, the moving mechanism 139 rotates the holding mechanism support frame 120 counterclockwise by a predetermined angle in the right side view. The adjustment air nozzle 146 blows air forward onto the printing surface F2a (rear side surface) near the starting end F2L of the second film F2. As a result, the position of the second film F2 is adjusted so that it hangs downward from the film pressing mechanism 117 without being wrapped around the fixed roller 112 or the first film F1 used for bag making (see FIG. 9). ).

(2-2-9) Film connection mechanism The film connection mechanism 160 includes a connection portion 162, a first clamp 163, a second clamp 164, a knife 166, a pinch roller 168, a second position adjustment sensor 152, and a third position adjustment sensor 152. It includes a sensor 154 and a cooling unit 161 (see FIGS. 3 and 9).

(2-2-9-1) Connection portion The connection portion 162 is fixed to a frame (not shown) of the bag making and packaging machine 1000. As described above, the connecting portion 162 connects the connecting portion of the film F wound around the film roll FR attached to one of the shafts 111a, 111b of the holding mechanisms 110a, 110b, and the shaft of the other holding mechanism 110b, 110a. This is a mechanism for connecting the connection portion of the film F wound around the film roll FR mounted on the film rolls 111b and 111a. As described above, the connecting portion 162 is a mechanism for thermally welding the film F using a heater (not shown) as a heat source. However, the method of connecting the films F is not limited to thermal welding, and the films F may be connected by, for example, ultrasonic welding.

The operation of the connecting section 162 will be explained with reference to FIG. 9. The connecting portion 162 connects the connecting portion F11 of the first film F1 wound around the first film roll FR1 (used film roll FR) attached to the first shaft 111a of the first holding mechanism 110a, and the second holding mechanism A guide member fixed to the arm 122b with a sealing member 162a connects the connecting portion F21 of the second film F2 wound around the second film roll FR2 (replacement film roll FR) mounted on the second shaft 111b of the second shaft 110b. Press 119. The connecting portion 162 is constructed by utilizing heat from a heater (not shown) while sandwiching the connecting portion F11 of the first film F1 and the connecting portion F21 of the second film F2 between the sealing member 162a and the guide member 119. Films F1 and F2 are thermally welded.

(2-2-9-2) First clamp and second clamp The first clamp 163 and the second clamp 164 are arranged along the transport path of the film F when supplying the film F to the bag making device 200. be done. The first clamp 163 and the second clamp 164 suppress the displacement of the film F of the used film roll FR after adjusting the position of the connection part of the film F of the used film roll FR to the position where the connection part 162 connects. This is a member that sandwiches and fixes the film F. The operation of the first clamp 163 and the second clamp 164 (pinch/release of the film F) is controlled by the operation/stopping of the first clamp drive mechanism 163a and the second clamp drive mechanism 164a, respectively. Note that the first clamp drive mechanism 163a and the second clamp drive mechanism 164a may use air pressure as a drive source, or may use a motor as a drive source.

(2-2-9-3) Knife The knife 166 is an example of a cutting section. The knife 166 and the connecting portion 162 are fixedly arranged at separate positions on the transport path of the film F. Note that the expression that the knife 166 and the connecting portion 162 are fixedly arranged means that the distance between the knife 166 and the connecting portion 162 does not change in the transport direction of the film F. It is difficult to arrange the knife 166 and the connecting portion 162 close to each other because there is a mechanism for driving them. The knife 166 and the connecting portion 162 are placed apart from each other by a distance L1 on the transport path of the film F. Although not limited to this, the distance L1 is, for example, 50 mm or more. In the present embodiment, the knife 166 is arranged on the upstream side of the connecting portion 162 (on the film roll FR side) in the transport direction of the film F when the film F is supplied to the bag making device 200, as shown in FIG. has been done.

The knife 166 is a member that cuts together a first predetermined location of the film F of the used film roll FR and a second predetermined location of the film F of the replacement film roll FR. Note that the first predetermined location is located between the terminal end of the film F of the used film roll FR and the connection portion of the film F of the used film roll FR. The second predetermined location is located between the starting end of the film F of the replacement film roll FR and the connection portion of the film F of the replacement film roll FR.

Execution/stop of cutting of films F1, F2 by knife 166 is controlled by operation/stop of knife drive mechanism 166a. The knife drive mechanism 166a may use air pressure as a drive source, or may use a motor as a drive source.

Note that the film supply device 100 includes a knife operation detection sensor 166b for detecting operation of the knife 166 (see FIG. 3). The knife motion detection sensor 166b may be disposed on the same side as the knife 166 (in this embodiment, on the upper side where the film connection mechanism 160 and the like are disposed), or may be disposed on the guide member 119 side. The knife motion detection sensor 166b is, for example, a photoelectric sensor. However, the knife motion detection sensor 166b may be any type of sensor that can detect the movement of the knife 166, and may be an inductive or capacitive proximity sensor, for example.

(2-2-9-4) Pinch Roller The pinch roller 168 pinches the film F between itself and other rollers, and conveys the film F by rotating in this state.

For example, the pinch roller 168 is arranged so that the connecting portion of the film F of the used film roll FR is directed toward the film connecting position where the connecting portion 162 connects the connecting portion of the film F of the replacement film roll FR. The film F of the finished film roll FR is conveyed in the first direction D1 (see FIG. 9). The pinch roller 168 is a mechanism that can change the conveyance speed of the film F.

The operation of the pinch roller 168 will be described in detail with reference to FIG. 9, taking as an example the case where the first film F1 is the film F of the used film roll FR and the second film F2 is the film F of the replacement film roll FR. do.

The pinch roller 168 moves the fixed roller 112 (in FIG. 9, three fixed Among the rollers 112, it is pressed toward the fixed roller 112b arranged at the uppermost position. As a result, the first film F1 is sandwiched between the pinch roller 168 and the fixed roller 112b. In this state, the pinch roller 168 is rotated clockwise in the right side view by the pinch roller drive mechanism 168b (see arrow in FIG. 9). The pinch roller drive mechanism 168b is, for example, a servo motor. When the pinch roller 168 is rotated by the pinch roller drive mechanism 168b, the first film F1 is conveyed in the first direction D1 (in the opposite direction to the bag-making and packaging operation) toward the first film roll FR1. . The pinch roller 168 moves the first film F1 of the first film roll FR1 until it reaches a film connection position where the connection part F11 of the first film F1 of the second film roll FR2 is connected to the connection part F21 of the second film F2 of the second film roll FR2. The first film F1 of one film roll FR1 is conveyed in the first direction D1. The mode of drive control of the pinch roller 168 by the pinch roller drive mechanism 168b when adjusting the position of the connection portion of the film F of the used film roll FR will be described in detail later.

The pinch roller 168 also connects the film F of the used film roll FR after the connection part of the film F of the used film roll FR and the connection part of the film F of the replacement film roll FR are connected by the connection part 162. It also functions as a transport section for the film F of the replacement film roll FR. In addition, below, in order to avoid complicating the explanation, the film F of the connected used film roll FR and the film F of the replacement film roll FR may be referred to as a connection film. The pinch roller 168 conveys the connecting film to a predetermined position after the connecting portion 162 connects the connecting portion of the film F of the used film roll FR to the connecting portion of the film F of the replacement film roll FR. In addition, in the connection film placed at a predetermined position, the connection part of the film F of the used film roll FR and the connection part of the film F of the replacement film roll FR are exchanged with the film F of the used film roll FR by the connection part 162. The knife 166 is located closer to the knife 166 than when the film roll FR is connected to the film F.

An example in which the first film F1 is the film F of the used film roll FR and the second film F2 is the film F of the replacement film roll FR will be described with reference to FIGS. 9 and 12A to 12F.

The pinch roller 168 conveys the connecting film FJ to the first position Po1 after the connecting portion 162 connects the connecting portion F11 of the film F1 and the connecting portion F21 of the second film F2. Specifically, the pinch roller 168 conveys the connecting film FJ in the first direction D1 (in the opposite direction to the bag-making and packaging operation) to the first position Po1, as shown in FIGS. 12C and 12D. Here, the knife 166 is disposed downstream of the connecting portion 162 in the first direction D1. Therefore, the connection portion F11 of the film F1 and the connection portion F21 of the second film F2 by the connection portion 162 are conveyed toward the knife 166. Note that the pinch roller 168 moves the connecting film FJ by a distance smaller than the distance L1 in the first direction D1 after the connecting portion 162 connects the connecting portion F11 of the film F1 and the connecting portion F21 of the second film F2. The distance L1 is the distance between the knife 166 and the connecting portion 162 on the transport path of the film F (see FIG. 12D). As a result, the connection portion F11 of the film F1 of the connection film FJ and the connection portion F21 of the second film F2 are arranged between the connection portion 162 and the knife 166 in the transport path of the film F. For example, but not limited to, in the conveying path of the connecting film FJ by the pinch roller 168, the connecting portion F11 of the film F1 and the connecting portion F21 of the second film F2 in the connecting film FJ conveyed to the first position Po1. , and the knife 166 is in the range of 10 mm to 20 mm.

In this embodiment, the knife 166 cuts the films F1 and F2 together after the pinch roller 168 transports the connecting film FJ to the first position Po1. Therefore, in the film supply device 100 of the present embodiment, it is possible to suppress the amount of unnecessary portions remaining on the connection film FJ, which may cause problems in conveyance of the film F. Note that the unnecessary parts remaining on the connection film FJ are the film between the connection part of the film F of the used film roll FR and the connection part of the film F of the replacement film roll FR by the knife 166, and the part of the film F of the replacement film roll FR. Refers to the film between the connecting part and the connecting part by the knife 166. The amount of unnecessary portion remaining on the connection film FJ is the length of the unnecessary portion remaining on the connection film FJ.

(2-2-9-5) Second position adjustment sensor and third position adjustment sensor The second position adjustment sensor 152 and the third position adjustment sensor 154 are attached to the film F of the used film roll FR. This sensor detects registration marks M for position adjustment while the film F is being conveyed.

The second position adjustment sensor 152 and the third position adjustment sensor 154 are arranged along the conveyance path of the film F by the pinch roller 168. In particular, the second position adjustment sensor 152 and the third position adjustment sensor 154 are arranged along the transport path of the film F on the printing surface Fa side of the film F transported by the pinch roller 168. The third position adjustment sensor 154 is a registration mark for position adjustment attached to the film F downstream of the second position adjustment sensor 152 in the conveyance direction (first direction D1) of the film F by the pinch roller 168. Detect M.

The second position adjustment sensor 152 and the third position adjustment sensor 154 are, for example, registration mark sensors. However, the types of the second position adjustment sensor 152 and the third position adjustment sensor 154 are not limited to registration mark sensors, and may be sensors using cameras, for example. For example, the second position adjustment sensor and the third position adjustment sensor each image the printed surface Fa of the film F being conveyed with a camera, and use the registration mark M or print P on the printed surface Fa of the film F for position adjustment. It may also be detected as a mark.

A mode of drive control of the pinch roller 168 by the pinch roller drive mechanism 168b using the second position adjustment sensor 152 and the third position adjustment sensor 154 will be described later.

(2-2-9-6) Cooling unit The cooling unit 161 has a connection part of the film F of the used film roll FR connected by the connection part 162 and a connection part of the film F of the replacement film roll FR (connection film FJ). connection points).

The cooling unit 161 includes a cooling air solenoid valve 161a and an air outlet 161b. The air outlet 161b is arranged near the connection part 162. The cooling air solenoid valve 161a controls execution/stop of air blowing from the air outlet 161b. The air blown out from the air outlet 161b cools the connection portion of the connection film FJ.

(2-3) Control Device The control device 300 controls the operation of each part of the bag making and packaging machine 1000 (various configurations of the bag making device 200 and the film supply device 100).

Control device 300 includes a computer including a CPU and memory such as ROM and RAM. In the control device 300, the CPU controls the operation of each part of the bag making and packaging machine 1000 by reading and executing a program stored in the memory.

Note that the controller may realize the same functions as those exhibited by the control device 300 of the present embodiment using hardware such as a logic circuit, or may realize the same functions as those performed by the control device 300 of this embodiment, or may realize them by a combination of hardware and software.

The control device 300 is electrically connected to each part of the bag making and packaging machine 1000, for example, the film conveying belt 220, the vertical sealing mechanism 230, and the horizontal sealing mechanism 240 of the bag making device 200. The control device 300 also controls the frame rotation motor 138, the first holding mechanism motor 114a, the second holding mechanism motor 114b, the first air cylinder 118a, the first position adjustment sensor 142, and the position adjustment sensor 142 of the film supply device 100. Adjustment air solenoid valve 146a, connection part 162, first clamp drive mechanism 163a, second clamp drive mechanism 164a, knife drive mechanism 166a, second air cylinder 168a, pinch roller drive mechanism 168b, second position adjustment sensor 152, It is electrically connected to the third position adjustment sensor 154, the cooling air solenoid valve 161a, the third air cylinder 187, and the encoder 188.

The control device 300 receives the detection results of the first position adjustment sensor 142, the second position adjustment sensor 152, and the third position adjustment sensor 154. The control device 300 also receives the detection result of the encoder 188 (rotation angle of the shaft 184a connected to the fixed arm 186 of the movable roller 185). Control device 300 controls the position of movable roller 185 based on the detection result of encoder 188. Further, the control device 300 may detect the end of the film roll FR based on the detection result of the encoder 188. Further, the control device 300 may calculate the transport distance of the film F based on the detection result of the encoder 188.

(3) Controlling the operation of the bag making and packaging machine by the control device Next, the control of the operation of the bag making and packaging machine 1000 by the control device 300 will be explained.

(3-1) Normal Operation During normal operation in which the bag making device 200 performs bag making and packaging operations, the control device 300 controls each part of the bag making and packaging machine 1000, such as the motors 114a and 114b for the holding mechanism of the film feeding mechanism 116 ( A motor that drives the shafts 111a and 111b of the holding mechanisms 110a and 110b that hold the film roll FR in use), a third air cylinder 187 of the tension adjustment mechanism 180, a film conveyance belt 220, and a vertical sealing mechanism 230. The operation with the horizontal seal mechanism 240 is controlled as follows.

The control device 300 controls the film conveyance belt 220 so that the sheet-shaped film F pulled out from the film roll FR is conveyed at a predetermined speed using the holding mechanism motors 114a and 114b. The operation method of the bag making and packaging machine 1000 includes a continuous operation in which the film F (cylindrical film Ft) is continuously conveyed at a constant speed, and a continuous operation in which the film F (cylindrical film Ft) is alternately conveyed/stopped. There is intermittent operation. The operation method of the bag making and packaging machine 1000 is appropriately selected depending on the operating conditions.

The control device 300 starts/stops the holding mechanism motors 114a and 114b of the film feeding mechanism 116 and controls the movement of the film roll FR by the holding mechanism motors 114a and 114b based on the conveyance state of the film F and the detection results of the encoder 188. Control the rotation speed. That is, the control device 300 controls the film feeding mechanism 116 to change the feeding speed of the film F during the bag making and packaging operation in the bag making device 200.

For example, the control device 300 starts/stops the holding mechanism motors 114a and 114b, which feed out the film F, in synchronization with the start/stop timing of the film conveyance belt 220. In other words, the control device 300 changes the feeding speed of the film F by the holding mechanism motors 114a and 114b based on the conveying speed of the film conveying belt 220 during the bag making and packaging operation in the bag making device 200.

Further, the control device 300 controls the rotational speed of the shafts 111a and 111b that hold the film roll FR by the holding mechanism motors 114a and 114b of the film feeding mechanism 116, based on the detection result of the encoder 188.

Furthermore, the control device 300 controls the third air cylinder 187 so that the movable roller 185 applies a constant force to the film F being conveyed.

The control device 300 also controls the vertical sealing mechanism 230 so that the vertical sealing mechanism 230 vertically seals the cylindrical film Ft at a predetermined timing, and the horizontal sealing mechanism 240 performs lateral sealing of the cylindrical film Ft at a predetermined timing. and controls the operation of the horizontal seal mechanism 240.

(3-2) Connection operation of the film of the film roll The following describes the connection operation (automatic splicing operation) of the film F of the film roll FR of the bag making and packaging machine 1000.

(3-2-1) Setting the replacement film roll The operator's work and the operation of the bag making and packaging machine 1000 when setting the replacement film roll FR on the holding mechanisms 110a and 110b will be described.

Here, the operator's work and the operation of the bag making and packaging machine 1000 when setting the replacement second film roll FR2 on the second holding mechanism 110b will be described as an example. The operation when setting the first film roll FR1 on the first holding mechanism 110a is the same as the operation when setting the second film roll FR2 on the second holding mechanism 110b, so a description thereof will be omitted here.

First, the operator attaches the second film roll FR2 to the second shaft 111b of the second holding mechanism 110b located at the film roll set position A1. Next, the operator pulls out the second film F2 from the second film roll FR2, aligns it along the upper surface of the guide member 119, and then pulls out the second film F2 so that it passes between the fixed roller 112 and the movable roller 118 of the film pressing mechanism 117. invite. Further, the operator manually temporarily places the film F pulled out from the film roll FR near the connecting portion on the temporary placement surface 143a of the film temporary placement section 143. Specifically, the operator makes sure that the registration mark M printed on the printing surface F2a of the second film F2 near the starting end F2L of the second film F2 is placed within a predetermined position range of the film temporary storage section 143. Then, the second film F2 is temporarily placed on the temporary placement surface 143a of the temporary film placement section 143. Next, the operator operates the temporary holding mechanism 144 to temporarily hold the second film F2 temporarily placed on the temporary holding surface 143a of the temporary film holding section 143. Thereafter, the operator operates the switch 102 (see FIG. 5) provided on the back side of the film supply device 100 to instruct the control device 300 to align the connection portion F21 of the second film F2.

The control device 300 drives the first air cylinder 118a to press the movable roller 118 against the fixed roller 112 in response to the instruction to align the connection portion F21 of the second film F2, and fixes the second film F2 to the movable roller 118. The second film F2 is held between the rollers 112 and the second film F2. As a result, displacement of the second film F2 is suppressed. Note that even when the movable roller 118 is holding down the second film F2, the second holding mechanism motor 114b can transport the second film F2. Next, the control device 300 rotates the second holding mechanism motor 114b of the film feeding mechanism 116, and rotates the second shaft 111b counterclockwise when viewed from the right side. As a result, the second film F2 is wound onto the second film roll FR2, and the starting end F2L of the second film F2 is conveyed to the first position adjustment sensor 142 side. When the first position adjustment sensor 142 detects the registration mark M attached to the second film F2 being conveyed (the registration mark M existing near the starting end F2L of the second film F2), the control device 300 detects the registration mark M attached to the second film F2 being transported. Conveyance of the second film F2 by the holding mechanism motor 114b is stopped. In this state, the connecting portion F21 of the second film F2 is placed at the normal position. Note that the displacement of the second film F2 after the connecting portion F21 of the second film F2 is adjusted to the normal position is suppressed because the movable roller 118 presses the second film F2. To summarize the above, the control device 300 drives the second holding mechanism motor 114b to rotate the second film roll FR2 after the second film F2 near the connecting portion F21 is temporarily placed in the film temporary placement section 143. In this way, the second film F2 is transported along a predetermined transport path. The control device 300 conveys the second film F2 along a predetermined conveyance path until the first position adjustment sensor 142 detects that the connecting portion F21 of the second film F2 is located at the normal position. With this, the control device 300 completes the alignment of the connection portion F21 of the second film F2.

Next, the moving mechanism 139 moves the second holding mechanism 110b from the film roll set position A1 to the film roll standby position A3. The film roll standby position A3 is a position rotated by a predetermined angle around the frame shaft 130 from the film roll set position A1. Specifically, the control device 300 controls the frame rotation motor 138 to rotate the holding mechanism support frame 120 by a predetermined angle, and moves the second holding mechanism 110b from the film roll set position A1 to the film roll standby position A3. By doing so, the connecting portion F21 of the second film F2 is arranged at the connecting portion with the first film F1 by the connecting portion 162. The second holding mechanism 110b, which has been moved to the film roll standby position A3, waits without particularly operating until the end of the first film F1 of the first film roll FR1 of the first holding mechanism 110a is detected.

Note that when the second holding mechanism 110b is moved by the moving mechanism 139 from the film roll set position A1 to the film roll standby position A3, the second holding mechanism 110b is moved from the film supply position A2 to the film supply position A4. The control device 300 prevents malfunctions such as loosening of the second film F2 or deviation of the tension acting on the film F2 from an appropriate value due to the movement of the second holding mechanism 110b to the film supply position A4 by controlling the second holding mechanism 110b. This is suppressed by controlling the motor 114b and the like. Specifically, the control device 300 detects a change in the position of the movable roller 185 detected by the encoder 188, and controls the second holding mechanism of the film feeding mechanism 116 based on the detection result to suppress the detected malfunction. The mechanism motor 114b and the like are controlled.

In addition, when moving the second holding mechanism 110b from the film roll set position A1 to the film roll standby position A3, the control device 300 controls the position adjustment air solenoid valve 146a to remove the air from the position adjustment air nozzle 146. The position of the second film F2 near the starting end F2L is adjusted by blowing air near the starting end F2L of the second film F2.

Further, when the second holding mechanism 110b rotates by a predetermined angle from the film roll set position A1 and moves to the film roll standby position A3, the control device 300 controls the film feeding mechanism 116 to control the second holding mechanism 110b. The second shaft 111b of the second holding mechanism 110b is rotated by an angle corresponding to a predetermined angle (for example, the same angle as the predetermined angle) in the same direction as the rotation direction of the second holding mechanism 110b. By performing such control, the second holding shaft 111b and the second layer shaft 134 of the frame shaft 130 are connected via the belt 115d1 of the fourth transmission mechanism 115d. It is possible to suppress loosening of the second film F2 that occurs when the mechanism 110b rotates. By suppressing the loosening of the second film F2, for example, it is possible to suppress the occurrence of problems such as misalignment of the connecting portion F21 of the second film F2.

(3-2-2) Switching of the film roll to be used The operation of the bag making and packaging machine 1000 regarding switching of the film roll FR to be used will be further explained with reference to the flowchart of FIG. 13.

Here, explanation will be given using an example in which the first film roll FR1 is a used film roll (a film roll that has been used for bag making and packaging) and the second film roll FR2 is a replacement film roll. In other words, here, the first film, the first part of the first film, the first film roll, the second film, the second part of the second film, the second film roll, the first holding part, and The second holding section includes a first film F1, a connecting portion F11 of the first film F1, a first film roll FR1, a second film F2, a connecting portion F21 of the second film F2, a second film roll FR2, a first The case of the holding mechanism 110a and the second holding mechanism 110b will be explained as an example. Note that even when the second film roll FR2 is a used film roll and the first film roll FR1 is a replacement film roll, the first film roll FR1 is a used film roll and the second film roll FR2 is a replacement film roll. Even in the case of a roll, the operation when the film F of the used film roll FR is connected to the film F of the replacement film roll FR is the same. Here, in order to simplify the specification, a description of the case where the second film roll FR2 is a used film roll and the first film roll FR1 is a replacement film roll will be omitted.

FIG. 13 shows the film supply device 100 when switching the film roll FR to be used by connecting the first film F1 of the used first film roll FR1 to the second film F2 of the replacement second film roll FR2. 3 is a flowchart for explaining an example of the operation.

Switching of the film roll FR to be used is performed using detection of the end of the film roll FR in use as a trigger (step S1 in FIG. 13).

For example, the control device 300 detects the end of the first film roll FR1 based on the detection result of the encoder 188. In other words, the control device 300 detects, based on the detection result of the encoder 188, that the second film F2 has been completely pulled out from the second film roll FR2. The control device 300 detects the end of the first film roll FR1 based on a physical quantity related to the position of the movable roller 185 detected by the encoder 188, for example, the rotation angle of the shaft 184a to which the fixed arm 186 of the movable roller 185 is connected. .

During normal operation of the bag making and packaging machine 1000, which will be specifically explained, the position of the movable roller 185 is controlled to a predetermined position (predetermined area). However, in a state where the entire film F has been pulled out from the film roll FR, the film F cannot be pulled out any further from the film roll FR. Therefore, even if the control device 300 controls the operation of each part of the bag making and packaging machine 1000, the movable roller 185 is lifted by the film F and moves upward beyond the predetermined area. Therefore, the control device 300 determines whether the rotation angle of the shaft 184a detected by the encoder 188 exceeds a predetermined threshold (whether the arm 186 has rotated to a position that cannot be taken during normal operation). . Then, the control device 300 detects the end of the film roll FR when the rotation angle of the shaft 184a exceeds a predetermined threshold value.

In addition, in this embodiment, the end of the film roll FR is detected using the encoder 188 as a sensor, but it is not limited to such an aspect. For example, in another embodiment, a photoelectric sensor 190 (see FIG. 2) placed near the film supply position A4 detects an end mark (not shown) attached to the film F indicating the end of the film roll FR. The end of the film roll FR may be detected by this (the photoelectric sensor 190 is omitted in FIG. 3). Further, for example, the end of the film roll FR may be detected by detecting the film F using a camera or sensor (not shown) placed near the film supply position A4.

When the sensor such as the encoder 188 or the photoelectric sensor 190 detects the end of the first film roll FR1, the control device 300 interrupts the normal operation of the bag making and packaging machine 1000 (step S2 in FIG. 13). Specifically, the control device 300 stops the operations of the film conveyance belt 220, the vertical seal mechanism 230, and the horizontal seal mechanism 240. Further, when the control device 300 detects the end of the first film roll FR1, the control device 300 stops the operation of the first holding mechanism motor 114a of the film feeding mechanism 116.

Further, the control device 300 adjusts the position of the first film F1 when a sensor such as the encoder 188 or the photoelectric sensor 190 detects the end of the film roll FR (step S3 in FIG. 13). Specifically, the control device 300 drives the second air cylinder 168a to press the pinch roller 168 toward the fixed roller 112b of the first holding mechanism 110a, and pushes the second film F2 between the pinch roller 168 and the fixed roller. 112b. Then, the control device 300 drives the pinch roller drive mechanism 168b to rotate the pinch roller 168 clockwise as shown in FIG. (in the opposite direction to the direction in which film F is transported). Among the fixed rollers 112 of the first holding mechanism 110a, the fixed roller 112c disposed at the lowermost and frontmost position in the state depicted in FIG. 9 is used as a guide when the first film F1 is conveyed by the pinch roller 168. Ru.

At this time, the control device 300 moves the second film F2 in the first direction D1 at the conveyance speed V1 until the second position adjustment sensor 152 detects the registration mark M printed on the printing surface F1a of the first film F1. The pinch roller drive mechanism 168b is controlled to convey the . After the second position adjustment sensor 152 detects the registration mark M, the control device 300 transports the second film F2 in the first direction D1 at a transport speed V2. When the third position adjustment sensor 154 detects the registration mark M, the control device 300 determines that the connecting portion F11 of the first film F1 has reached the position where it is connected to the second film F2 by the connecting portion 162. . Then, the control device 300 controls the pinch roller drive mechanism 168b to stop in order to stop the conveyance of the second film F2 by the pinch roller 168. Note that there is a relationship between the above-mentioned transport speed V1 and transport speed V2: transport speed V1>transport speed V2. That is, in the present embodiment, the control device 300 determines that the transport speed V1 of the second film F2 by the pinch roller 168 before the second position adjustment sensor 152 detects the registration mark M is determined by the second position adjustment sensor 152. The pinch roller drive mechanism 168b is controlled so as to be faster than the conveyance speed V2 of the second film F2 by the pinch roller 168 after the detection of the registration mark M. When the third position adjustment sensor 154 detects the registration mark M and the conveyance of the first film F1 by the pinch roller 168 is stopped based on this, the connecting portion F11 of the first film F1 is It has been moved to the connection position.

Next, the film supply device 100 connects the first film F1 and the second film F2 (step S4 in FIG. 13). Specifically, the control device 300 first drives the first clamp drive mechanism 163a and presses the first film F1 with the first clamp 163 in order to suppress the displacement of the connecting portion F11 of the first film F1. In addition, in order to suppress the positional shift of the connecting portion F11 of the first film F1, the control device 300 drives the second clamp drive mechanism 164a and presses the first film F1 and the second film F2 with the second clamp 164 ( (see FIG. 12A). Then, the control device 300 controls the connecting portion 162 to connect the connecting portion F11 of the first film F1 and the connecting portion F21 of the second film F2. Specifically, the control device 300 sandwiches the connecting portion F11 of the first film F1 and the connecting portion F21 of the second film F2 between the sealing member 162a of the connecting portion 162 and the guide member 119, and The connecting portion F11 of F1 and the connecting portion F21 of the second film F2 are thermally welded (see FIG. 12B). For example, the control device 300 drives the first clamp drive mechanism 163a and the second clamp drive mechanism 164a, and connects the connection portion F11 of the first film F1 and the connection portion F21 of the second film F2 by the connection portion 162. , are executed at approximately the same timing.

Note that, after the connection portion F11 of the first film F1 and the connection portion F21 of the second film F2 are thermally welded, the control device 300 controls the cooling air solenoid valve 161a to blow air from the air outlet 161b to the connection film FJ. It is preferable to blow out air to cool the connecting portion F11 of the first film F1 and the connecting portion F21 of the second film F2.

Next, the film supply device 100 transports the connection film FJ to the above-mentioned first position Po1 in order to adjust the position of the first film F1 and second film F2 after connection by the connection unit 162 (see FIG. 12). Step S5). Specifically, the control device 300 controls the first clamp drive mechanism 163a and the second clamp drive mechanism 164a to cause the first clamp 163 and the second clamp 164 to hold down the first film F1 and the second film F2. (See FIG. 12C). Then, the control device 300 drives the pinch roller drive mechanism 168b, rotates the pinch roller 168 clockwise as shown in FIG. 9 when viewed from the right side, and moves the first film F1 in the first direction D1. Convey to position Po1. At this time, the control device 300 operates the second holding mechanism motor 114b in conjunction with the pinch roller drive mechanism 168b so that the second film F2 is fed out from the second film roll FR2. As a result, it is suppressed that the second film F2 is pulled and excessive force is applied to the connection film FJ during conveyance of the connection film FJ. Regarding the first film F1 side of the connection film FJ, the movement of the movable roller 185 causes the first film F1 to be fed out from the tension adjustment mechanism 180 as a film storage mechanism. This prevents excessive force from being applied to the connection film FJ due to the film F1 being stretched.

Next, the film supply device 100 cuts the first film F1 and the second film F2 together in order to cut off unnecessary parts of the connection film FJ (step S6 in FIG. 13).

Specifically, in order to suppress the displacement of the connection film FJ, the control device 300 drives the second clamp drive mechanism 164a and presses the connection film FJ with the second clamp 164 (see FIG. 12E). Further, the control device 300 drives the knife drive mechanism 166a to cut the first film F1 and the second film F2 together with the knife 166 (see FIGS. 12E and 12F). The knife 166 cuts the first film F1 between the terminal end F1T of the first film F1 and the connecting portion F11 of the first film F1. Further, the knife 166 cuts the second film F2 between the starting end F2L of the second film F2 and the connecting portion F21 of the second film F2.

Next, the bag making and packaging machine 1000 resumes normal operation (step S7 in FIG. 13). Specifically, the control device 300 controls the second clamp drive mechanism 164a to release the second clamp 164 from holding the connection film FJ. Further, the control device 300 controls the second air cylinder 168a to move the pinch roller 168 away from the fixed roller 112b, thereby releasing the pinch roller 168 from holding down the film F. Thereafter, the control device 300 moves the second holding mechanism 110b located at the film roll standby position A3 to the film supply position A2 by the moving mechanism 139, while moving the film conveying belt 220, the vertical sealing mechanism 230, and the horizontal sealing mechanism 240. to return to normal operation.

Note that the bag making and packaging machine 1000 may include a connection point detection sensor 192 in order to grasp the position of the connection point between the connection portion F11 of the first film F1 and the connection portion F21 of the second film F2 in the connection film FJ. preferable. The connection point detection sensor 192 is arranged adjacent to the transport path of the film F (connection film FJ), as shown in FIG. By grasping the position of the connection point between the connection part F11 of the first film F1 and the connection part F21 of the second film F2 in the connection film FJ, the connection between the first film F1 and the second film F2 that is not suitable for bag making can be avoided. It is possible to prevent the location from being used for manufacturing bag B. Note that in FIG. 2, the connection point detection sensor 192 is drawn adjacent to the upstream side of the tension adjustment mechanism 180, but FIG. 2 does not limit the installation location of the connection point detection sensor 192. The installation location of the connection point detection sensor 192 may be designed as appropriate. For example, a retroreflective photoelectric sensor is used as the connection point detection sensor 192.

Note that due to reasons such as unnecessary parts of the connection film FJ sticking to the connection point detection sensor 192, the connection point detection sensor 192 detects the connection point between the connection portion F11 of the first film F1 and the connection portion F21 of the second film F2. The location may not be detected. Therefore, the control device 300 calculates the feed amount of the connecting film FJ from, for example, the amount of rotation of the second shaft 111b, the operating time of the film conveying belt 220, etc., and determines the connection point between the first film F1 and the second film F2. If the connection point detection sensor 192 does not detect the connection point between the first film F1 and the second film F2 at the timing when the connection point detection sensor 192 passes the detection position, the control device 300 controls the bag making and packaging machine. 1000 is stopped due to an error. Note that the control device 300 determines the position where the connection point between the first film F1 and the second film F2 of the connection film FJ is arranged when the connection film FJ is at the first position Po1, and the connection point detection sensor on the conveyance path of the connection film FJ. The distance to the detection position by 192 is known in advance. Therefore, if the feed amount of the connection film FJ from the first position Po1 is known, the control device 300 can determine the timing when the connection point between the first film F1 and the second film F2 passes the detection position by the connection point detection sensor 192. Can be detected.

When the second holding mechanism 110b is moved to the film supply position A2, the first holding mechanism 110a is moved to the film roll setting position A1. Then, a new (replacement) first film roll FR1 is set in the first holding mechanism 110a.

(4) Features Below, the features of the film supply device 100 and the bag making and packaging machine 1000 will be explained.

Here, an example will be described in which the first film roll FR1 is a used film roll (a film roll that has been used for bag making and packaging) and the second film roll FR2 is a replacement film roll. Note that even when the second film roll FR2 is a used film roll and the first film roll FR1 is a replacement film roll, the film supply device 100 and the bag making and packaging machine 1000 have similar characteristics.

(4-1)
The film supply device 100 of the present embodiment includes a first holding mechanism 110a as an example of a first holding part, a second holding mechanism 110b as an example of a second holding part, a connecting part 162, and an example of a cutting part. knife 166. The first holding mechanism 110a rotatably holds the first film roll FR1 around which the first film F1 is wound. The second holding mechanism 110b rotatably holds a second film roll FR2, on which a second film F2 is wound, for replacement with the first film roll FR1. The connecting portion 162 connects the connecting portion F11 of the first film F1 and the connecting portion F21 of the second film F2. The knife 166 is attached to a first predetermined location of the first film F1 between a terminal end F1T of the first film F1 and a connecting portion F11 of the first film F1, and a connecting portion between the starting end F2L of the second film F2 and the second film F2. A second predetermined portion of the second film F2 between the film F21 and the film F21 is cut together. The connecting portion 162 and the knife 166 are fixedly arranged apart from each other.

In this film supply device 100, after the first film F1 of the used film roll and the second film F2 of the replacement film roll are connected, the first film F1 is cut between the terminal end F1T and the connecting part F11, and the first film F1 is cut between the terminal end F1T and the connecting part F11. 2 film F2 is cut between the starting end F2L and the connecting portion F21. Therefore, in the present film supply device 100, it is possible to reduce the length of the unnecessary portion of the second film F2 that remains on the connection film FJ sent to the bag making device 200 and may cause problems in film conveyance.

In addition, in the present film supply device 100, since the knife 166 cuts the first film F1 and the second film F2 together, when the knife 166 is provided independently for each of the first film F1 and the second film F2, In comparison, manufacturing costs for film supply equipment can be reduced.

(4-2)
The film supply device 100 of this embodiment includes a pinch roller 168 as an example of a conveying section. Pinch roller 168 conveys connection film FJ. The connection film FJ is the first film F1 and the second film F2 after being connected by the connection part 162. The pinch roller 168 moves the connecting portion F11 of the first film F1 and the connecting portion F21 of the second film F2 closer to the knife 166 than when the connecting portion 162 connects the first film F1 and the second film F2. , conveys the connection film to the first position Po1. After the connecting film FJ is conveyed to the first position Po1 by the pinch roller 168, the knife 166 cuts the first predetermined portion of the first film F1 and the second predetermined portion of the second film F2 together.

In this film supply device 100, after the first film F1 and the second film F2 are connected, the connection point between the first film F1 and the second film F2 is brought close to the knife 166. Therefore, even if the connecting portion 162 and the knife 166 are arranged apart, the length of the unnecessary portion of the second film F2 remaining on the connecting film FJ sent to the bag making device 200 can be reduced. Furthermore, in the present film supply device 100, the length of the unnecessary portion of the first film F1 remaining on the connection film FJ sent to the bag making device 200 can also be reduced.

Note that if a knife is built into the connecting portion 162, the length of the unnecessary portion remaining on the connecting film FJ can be reduced without having to transport the connecting film FJ after the films are connected. However, if such a complicated structure is adopted, the manufacturing cost of the film supply device 100 will increase. On the other hand, since the present film supply device 100 employs a relatively simple structure, an increase in the manufacturing cost of the film supply device 100 can be suppressed.

(4-3)
The film supply device 100 of this embodiment includes a tension adjustment mechanism 180 as an example of a film storage mechanism. The tension adjustment mechanism 180 includes a movable roller 185 around which the first film F1 is wound.

The film supply device 100 of this embodiment includes a film storage mechanism, so that even if the bag making device 200 is stopped, the connection point between the first film F1 and the second film F2 in the connection film FJ can be moved to the knife 166. Easy to approach.

(4-4)
In the film supply device 100 of this embodiment, the connecting portion 162 thermally welds the connecting portion F11 of the first film F1 and the connecting portion F21 of the second film F2. The film supply device 100 includes a cooling section 161. The cooling unit 161 cools the connecting portion F11 of the first film F1 and the connecting portion F21 of the second film F2, which are connected by the connecting portion 162.

In the present film supply device 100, by cooling the connection portion between the first film F1 and the second film F2, the first film F1 and the second film F2 can be firmly fixed in a relatively short time. Therefore, even if a long waiting time is not provided after the connection, problems such as the first film F1 and the second film F2 becoming disconnected during transport of the connection film FJ are less likely to occur.

(4-5)
The bag making and packaging machine 1000 of this embodiment includes a film supply device 100 and a bag making device 200. The bag-making device 200 forms the film F supplied by the film supply device 100 into a cylindrical shape, and seals the film horizontally to form a bag B.

In this bag making and packaging machine 1000, problems in transporting the film F occur, such as an unnecessary portion of the second film F2 in the connecting film FJ becoming entangled with parts such as the roller 170 of the film supply device 100 or the former main body 212 of the bag making device 200. can be suppressed.

(5) Modifications Modifications of this embodiment will be shown below. The modified examples may be combined as appropriate within a mutually consistent range.

(5-1) Modification A
In the embodiment described above, after the first film F1 and the second film F2 are connected, the connection film FJ is conveyed to the first position Po1. However, it is not limited to this embodiment. For example, the knife 166 cuts the first film F1 and the second film F2 together without moving the connecting film FJ from the time when the first film F1 and the second film F2 are connected by the connecting portion 162. Good too.

For example, when the first film F1 and the second film F2 are connected together by the connecting part 162, the first film F1 and the second film F2 are cut together with the knife 166 without moving the connecting film FJ, for example, as shown in FIG. As shown in the flowchart, the first film F1 and the second film F2 may be connected by the knife 166 at the same time as the first film F1 and the second film F2 are connected by the connecting portion 162. By operating the film supply device 100 in this manner, switching of the film roll FR to be used can be completed in a short time.

In addition, when cutting the first film F1 and the second film F2 together with the knife 166 without moving the connecting film FJ from the time when the first film F1 and the second film F2 are connected by the connecting part 162, immediately after cutting. When the film F is conveyed by the film conveyance belt 220, the film F may stick to the sealing member 162a of the connecting portion 162 or the guide member 119, and the connecting film FJ may not be conveyed properly. Therefore, after the first film F1 and the second film F2 are connected by the connecting portion 162, the bag making and packaging machine 1000 may resume normal operation through the following operations. An example will be explained in which the first film roll FR1 is a used film roll (a film roll that has been used for bag making and packaging) and the second film roll FR2 is a replacement film roll.

First, the control device 300 stores in a memory the rotation angle of the shaft 184a detected by the encoder 188 when the first film F1 and the second film F2 are connected by the connecting portion 162. Next, the control device 300 controls the operation of the second holding mechanism motor 114b to rotate the second film roll FR2 in the opposite direction to the normal operation. In other words, the control device 300 controls the operation of the second holding mechanism motor 114b to wind up the connection film FJ onto the second film roll FR2. Note that the control device 300 receives the rotation angle of the shaft 184a detected by the encoder 188, and uses this value and the rotation angle of the shaft 184a when the first film F1 and the second film F2 are connected by the connection portion 162 stored in the memory. The rotation angle is compared, and after the difference becomes equal to or greater than a predetermined value, normal operation of the bag making and packaging machine 1000 is resumed. By such an operation, it is possible to suppress the occurrence of transportation problems of the connection film FJ due to adhesion of the connection film FJ to the sealing member 162a and the like.

(5-2) Modification B
In the above embodiment, the bag making and packaging machine 1000 has two holding mechanisms 110a and 110b, but is not limited to this, and may have three or more holding mechanisms.

(5-3) Modification C
In the above embodiment, the pinch roller 168, which is an example of a conveyance unit, connects the first film F1 and the second film after the connection unit 162 connects the connection part F11 of the first film F1 and the connection part F21 of the second film F2. The connecting film FJ is conveyed in the first direction D1 (the opposite direction to the conveying direction of the film F during normal operation) so that the connection point with F2 approaches the knife 166. However, the present invention is not limited to this. For example, if the knife 166 is disposed downstream of the connecting portion 162 in the transport direction of the film F during normal operation, the pinch roller 168 The connection film FJ may be transported in the transport direction of the film F during normal operation so that the connection point between the first film FJ and the second film F2 approaches the knife 166. After the pinch roller 168 conveys the connection film FJ to a predetermined position, the knife 166 is moved to a first predetermined position of the first film F1 between the terminal end F1T of the first film F1 and the connection part F11 of the first film F1. and a second predetermined location of the second film F2 between the starting end F2L of the second film F2 and the connecting portion F21 of the second film F2 may be cut together.

(5-4) Modification D
In the embodiment described above, the pinch roller 168 functions as a transport section, but the invention is not limited to this. The first holding mechanism motor 114a and the second holding mechanism motor 114b function as a transport section that transports the connection film FJ. It may function as

INDUSTRIAL APPLICATION This invention is widely applicable and useful to the film supply device equipped with the connection part of the film of a used film roll, and the film of a replacement film roll, and a bag making packaging machine equipped with a film supply device.

100 Film supply device 110a First holding mechanism (first holding section)
110b Second holding mechanism (second holding part)
114a First holding mechanism motor (transport unit)
114b Second holding mechanism motor (transport unit)
161 Cooling section 162 Connection section 166 Knife (cutting section)
168 Pinch roller (conveyance section)
180 Tension adjustment mechanism (film storage mechanism)
185 Movable roller (transport unit)
200 Bag making device 1000 Bag making packaging machine F1 First film F11 Connection part (first part)
F2 Second film F21 Connection part (second part)
FJ Connection film F1T End end of first film F2L Start end of second film FR1 First film roll FR2 Second film roll Po1 First position

Japanese Patent Application Publication No. 2008-127092

Claims (6)

a first holding part that rotatably holds a first film roll on which a first film is wound;
a second holding part that rotatably holds a second film roll, in which a second film is wound, for replacement with the first film roll;
a connecting portion connecting a first portion of the first film and a second portion of the second film;
A first predetermined location of the first film between the end of the first film and the first portion of the first film, and between the starting end of the second film and the second portion of the second film. a second predetermined location of the second film, and a cutting section that cuts the second film together;
a conveyance unit that conveys a connecting film, which is the first film and the second film after being connected by the connecting unit;
Equipped with
The connecting portion and the cutting portion are fixedly arranged apart from each other,
The conveying unit moves the first part of the first film and the second part of the second film closer to the cutting part than when the first film and the second film are connected by the connecting part. transporting the connecting film to a first position so as to
Film feeding device. The cutting section cuts together the first predetermined location of the first film and the second predetermined location of the second film after the connection film is transported to the first position by the transport section. cut,
The film supply device according to claim 1. further comprising a film storage mechanism including a movable roller around which the first film is wound;
The film supply device according to claim 2. The connection of the first film and the second film by the connection part and the cutting of the first film and the second film by the cutting part are performed at the same time.
The film supply device according to claim 1. The connecting portion heat-welds the first portion of the first film and the second portion of the second film,
The film supply device further includes a cooling unit that cools the first portion of the first film and the second portion of the second film that are connected by the connection portion.
The film supply device according to any one of claims 1 to 4. The film supply device according to any one of claims 1 to 5,
a bag making device that forms the film supplied by the film feeding device into a cylindrical shape and laterally seals the film to make a bag;
A bag making and packaging machine equipped with

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