JP7656192B2 - Filling and packaging machine - Google Patents

Description

The present invention relates to a filling and packaging machine that fills articles from above into a web that is folded in half and transported.

As a filling and packaging machine that fills articles into a web that is conveyed folded in half, for example, a device that fills an inner bag with articles and then fills an outer bag with the inner bag is known (Patent Document 1). In this device, the front and back of the inner bag web folded in half that is supplied to the rotating body of the inner bag packaging machine are side-sealed to form pockets, and articles are filled into each pocket from the upper opening using a hopper, and the upper opening is top-sealed to seal it. In the outer bag packaging machine downstream of the inner bag packaging machine, the rotating body to which the outer bag web folded in half is supplied side-seals the front and back of the outer bag web to form pockets, and the inner bag web supplied from the inner bag packaging machine is separated into bags, and the inner bags are inserted from above into the pockets of each outer bag web that are divided by side seals.

JP 2019-199283 A

With such filling and packaging machines, a trial run is required before production begins to make adjustments to the sealing units that supply each web. Specifically, the inner bag web is set in the inner bag packaging machine and the outer bag packaging machine, and the outer bag web is set in the outer bag packaging machine and adjustments are then made. However, if, for example, it takes longer to adjust the inner bag web than the outer bag web, the outer bag packaging machine must also be operated, resulting in the outer bags being wasted. The same is true if an abnormality occurs during production and adjustments are required for either machine.

The objective of the present invention is to provide a filling and packaging machine that can reduce waste of bag web during adjustment work.

A filling and packaging machine according to a first aspect of the present invention includes a rotating body to which a bag web folded in half is supplied, a plurality of sealing units provided on the outer periphery of the rotating body, the sealing units being wrapped around the bag web folded in half and sealing the bag web folded in half at predetermined intervals in a conveying direction to form bags, a filling unit provided above the sealing unit on the rotating body and capable of lifting and lowering to fill bags with supplied articles, and lifting means for lifting and lowering the filling unit. The rotating body is a filling and packaging machine having a sealing unit disposed on the sealing unit. The filling unit is arranged in a vertical direction and a vertical direction of the filling passage is arranged in a vertical direction, and the filling unit is arranged in a vertical direction. The filling unit is arranged in a vertical direction and a vertical direction of the filling passage is arranged in a vertical direction. The filling unit is arranged in a vertical direction and a vertical direction. The filling unit is arranged in a vertical direction and a vertical direction. The filling unit is arranged in a vertical direction and a vertical direction .

The present invention provides a filling and packaging machine that can reduce waste of materials during preparation work.

1 is a perspective view of a filling and packaging system according to one embodiment of the present invention; FIG. 2 is a plan view of the filling and packaging system of FIG. 1. FIG. 2 is a partial cross-sectional side view of the product filling machine. This is a development view of the operation of the section from the side sealing section of the inner bag filling machine to the first half of the input section, viewed radially outward. FIG. 5 is an enlarged view of section A3 (see FIG. 2) of FIG. 4; FIG. 2 is a partial cross-sectional side view of the inner bag filling machine. FIG. 2 is a block diagram showing the relationship between a servo motor and a control device. 5 is a development view of a cam groove illustrating the configuration of the cam track changing mechanism in a first operation mode. FIG. 13 is a development view of a cam groove illustrating the configuration of the cam track changing mechanism in the second operation mode. FIG.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of a filling and packaging system according to one embodiment of the present invention, and FIG. 2 is a plan view.

The filling and packaging system 10 of this embodiment includes an inner bag packaging device 12 and an outer bag packaging device (filling and packaging machine) 14. In the inner bag packaging device 12, a long strip-shaped inner bag web S1 is unwound from an inner bag unwinding section 16 and supplied to a product filling machine 18. The inner bag web S1 is unwound from a raw material roll 16A installed in the inner bag unwinding section 16, made horizontal by a guide roller 16B, folded upward in half along the longitudinal direction, and supplied to the product filling machine 18.

The product filling machine 18 is equipped with a rotor 18A that rotates around a vertical axis, and the inner bag web S1 folded in half runs in synchronization with the rotation of the rotor 18A along the outer periphery of the rotor 18A. The inner bag web S1 folded in half and wrapped around the rotor 18A is sealed vertically at regular intervals along the longitudinal direction (side seal) in the upstream section (side seal section) A1, and is formed into a bag shape with an opening at the top.

A hopper 18B is disposed above the outer circumference of the rotor 18A, corresponding to each inner bag B1 of the inner bag web S1 formed by the side seal. The hoppers 18B are sequentially inserted between the inner bag web S1 that has been folded in half from above further upstream of the upstream section A1. The hoppers 18B are then side-sealed in the upstream section A1, and the contents to be filled into the inner bag B1 are poured into each inner bag B1 from above in the downstream section (filling section) A2. When filling is complete, the hopper 18B is raised, and the inner bag web S1, which has been divided into multiple inner bags B1 in the longitudinal direction by the side seals and into which the contents have been poured, is released from the rotor 18A and sent toward the outer bag packaging device 14 via the guide roller 20.

The inner bag web S1 is sent out linearly via the guide rollers 20 toward the outer bag packaging device 14, and the upper edge of the folded inner bag web S1, i.e., the part where the opening of each inner bag B1 is formed, is preheated along the longitudinal direction through the preheating device 22 and top sealing device 24, and the opening is completely sealed in the top sealing device 24. As a result, the contents placed in each inner bag B1 formed on the inner bag web S1 are sealed within the inner bag B1.

A cutter 26 is disposed at the downstream end of the inner bag web S1, adjacent to the outer bag packaging device 14. Each inner bag B1 of the inner bag web S1, filled and sealed with the contents, is cut at the downstream end by the cutter 26 at the side seal position and separated into individual inner bags B1. Each inner bag B1 separated from the inner bag web S1 is held by a mechanism provided in the outer bag packaging device 14, as described below, and is inserted into each outer bag B2.

In the outer bag packaging device 14, a long strip-shaped outer bag web S2 is unwound from the outer bag unwinding section 28 and supplied to the inner bag filling machine 30. The outer bag web S2 is unwound from a raw roll 28A installed in the outer bag unwinding section 28, made horizontal by a guide roller 28B, folded in half upward along the longitudinal direction, and supplied to the inner bag filling machine 30.

The inner bag filling machine 30 is equipped with a rotor 30A that rotates around a vertical axis, and the outer bag web S2, which is folded in half, runs in synchronization with the rotation of the rotor 30A along the outer periphery of the rotor 30A. The outer bag web S2, which is folded in half and wrapped around the rotor 30A, is sealed vertically at regular intervals along the longitudinal direction (side seal) in the upstream section (side seal section) A3, and is formed into a bag shape with an opening at the top.

The inner bag web S1, which is sent out linearly by the guide roller 20 toward the outer bag packaging device 14, is positioned so that it nearly coincides with one of the outer circumferential tangents of the rotating body 30A of the inner bag filling machine 30. The cutter 26 is positioned so that it cuts the inner bag web S1 at a position that nearly corresponds to the contact point P with the rotating body 30A. Above the outer periphery of the rotating body 30A, there are arranged, corresponding to each outer bag B2, a hopper 30B that is inserted into the outer bag B2 to guide the inner bag B1 into the outer bag B2, and an inner bag holding device 32 (see Figures 4 and 6) that holds the cut inner bag B1 and inserts it into the corresponding hopper 30B, each of which can be raised and lowered.

Each inner bag B1 cut by the cutter 26 and held by the inner bag holding device 32 of the inner bag filling machine 30 is fed through the hopper 30B into each of the outer bags B2 formed in the upstream section (side seal section) A3 in the downstream section (feed section) A4, as described below. After the inner bags B1 are fed, the hopper 30B is raised and retreats from the outer bag B2, and the outer bag web S2 has its orientation changed via the guide roller 34, and like the inner bag web S1, its upper opening is sealed via the preheating section 36 and top seal device 38, and the inner bag B1 is sealed within each outer bag B2. The outer bag web S2, which has been sealed, is cut at the side seal position by the cutter 40, and the individual packaging of the inner bag B1 with the outer bag B2 is completed.

Next, the configuration of the product filling machine 18 will be described in more detail with reference to the side cross-sectional view of the product filling machine 18 in Figure 3.

The rotating body 18A of the product filling machine 18 has a disk-shaped base plate 180, and is rotatably attached around a fixed shaft 182 via a bearing 181. The base plate 180 is rotated in synchronization with the conveying speed of the inner bag web S1 by a drive mechanism (not shown). A number of side seal parts 184 are arranged around the periphery of the base plate 180 at regular intervals, around which the inner bag web S1 folded in half is hung.

The side seal section 184 comprises a fixed seal bar 184A that stands upright upward from the base plate 180, and a swinging seal bar 184B that is positioned outside the fixed seal bar 184A and has its base end journaled on the outer periphery of the base plate 180. The swinging seal bar 184B can swing between a lying state in which its tip faces radially outward, and an upright state in which it stands upright upward and is pressed against the fixed seal bar 184A. The rotation of the swinging seal bar 184B around its base end is controlled by the engagement of a cam follower 184D provided at the tip of a pivot lever 184E for rotating the swinging seal bar 184B with a cam groove 184C.

The inner bag web S1 runs while pressed against the fixed seal bar 184A, and when the oscillating seal bar 184B stands up and presses against the fixed seal bar 184A with the inner bag web S1 sandwiched between it, the inner bag web S1, which has been folded in half, is sandwiched between the fixed seal bar 184A and the oscillating seal bar 184B and welded together, forming a side seal. In Figure 3, the oscillating seal bar 184B in a lying position is shown on the left, and the oscillating seal bar 184B in an upright position is shown on the right.

A hopper 18B is disposed above the side seal portions 184 and between the two side seal portions 184. The hoppers 18B are supported by hopper lifting mechanisms 186. The hoppers 18B are supported by the upper ends of lifting shafts 186A extending vertically of the hopper lifting mechanisms 186. The lifting shafts 186A are supported so as to be freely raised and lowered relative to the base plate 180, and are raised and lowered by engagement between a cam follower 186B and a cam 186C provided at the lower end of the lifting shafts 186A. In FIG. 3, the left side shows the hopper 18B in a raised state, and the right side shows the hopper 18B in a lowered state with its tip inserted into the inner bag B1 of the inner bag web S1 formed by the side seals.

A tank 188 is disposed above the rotor 18A to store the contents to be filled into the inner bag B1, and a filling nozzle 188A is provided above each hopper 18B to guide the contents in the tank 188 to the hopper 18B. In the filling section A2, the contents in the tank 188 drop through the filling nozzle 188A and the hopper 18B and are poured into the inner bag B1.

Next, the operation of inserting the inner bag B1 into the outer bag B2 in the inner bag filling machine 30 will be described with reference to Figures 4 and 5. Figure 4 shows the operation of the section from the side seal section (upstream section) A3 of the inner bag filling machine 30 to the first half of the insertion section (downstream section) A4, viewed radially outward, in a plan view, and Figure 5 is an enlarged view of section A3 in Figure 4.

As shown in FIG. 4, the hoppers 30B are successively inserted from above between the outer bag web S2 that has been folded in half. In the side seal section (upstream section) A3, the hoppers 30B are inserted from above between the outer bag web S2 along the trailing edge side seal L of the hopper 30B inserted immediately before. Thereafter, the trailing edge side of the newly inserted hopper 30B is side sealed, and the next hopper 30B is similarly inserted between the outer bag web S2 along this side seal L.

The hopper 30B is inserted, and above the outer bag web S2, which has been divided into individual outer bags B2 by the side seal L, the inner bag web S1, which has been divided into inner bags B1 and sealed, is conveyed from the tangential direction of the outer periphery of the inner bag filling machine 30. The upper part of each inner bag B1 of the inner bag web S1 is gripped by the gripper (holding part) 32A of the inner bag holding device (filling unit) 32 in sequence just before the contact point P where the outer periphery of the inner bag filling machine 30 and the linear trajectory of the inner bag web S1 meet, and the inner bag B1 at the tip is cut off from the inner bag web S1 by the cutter 26 near the contact point P. At this time, the gripper 32A is protruded radially outward from the outer periphery of the inner bag filling machine 30 by the link mechanism, and rotated so as to be parallel to the tangential direction in order to hold each inner bag B1 moving along the tangential direction just before the contact point P.

In addition, from the time when the inner bag B1 is held until the inner bag B1 is cut, each gripper 32A is set to a pitch that matches the pitch D1 of the inner bag B1 formed on the inner bag web S1, but after cutting, it is matched to the pitch D2 of the outer bag B2 formed on the outer bag web S2, i.e., the pitch of the hopper 30B. Then, each gripper 32A is retracted radially inward and rotated in a direction along the outer periphery of the inner bag filling machine 30, and returned to its original position and orientation. In other words, each gripper 32A moves along the outer periphery of the inner bag filling machine 30 together with the hopper 30B, i.e., the outer bag B2.

Each gripper 32A that starts moving along the outer periphery of the inner bag filling machine 30 is lowered and inserts at least a portion of the inner bag B1 it is holding into the hopper 30B located directly below and releases it. This causes the inner bag B1 to fall through the hopper 30B and be inserted into the outer bag B2 into which the hopper 30B has been inserted.

Each hopper 30B is provided with a tube 30C, which injects nitrogen gas into the outer bag B2 while the hopper 30B is inserted into the outer bag B2. The hopper 30B is raised and removed from the outer bag B2 before the outer bag web S2 reaches the guide roller 34. The hopper 30B and gripper 32A are then moved along the outer periphery of the inner bag filling machine 30, and repeat the same operation when they reach just before the contact point P mentioned above.

Figure 6 is a partial cross-sectional side view of the inner bag filling machine 30 of this embodiment. The inner bag filling machine 30 includes a fixed part 300 including a fixed shaft 300A, and a rotating body 30A that rotates around the fixed shaft 300A via a bearing 301. The rotating body 30A is composed of a lower rotating body 302A and an upper rotating body 302B.

The lower rotating body 302A has a base plate 308 on which a side seal section (seal unit) 304 and a hopper lifting mechanism 306 that holds the hopper 30B are arranged along the outer periphery. The lower rotating section 302A is connected to a servo motor 303M via a gear 303 and can rotate in synchronization with the conveying speed of the outer bag web S2.

The outer bag web S2, folded in half, is wrapped around a number of side seal sections 304 arranged at regular intervals along the outer periphery of the base plate 308. The side seal sections 304 are equipped with a fixed seal bar 304A that stands upright upward from the base plate 308, and a swinging seal bar 304B that is positioned outside the fixed seal bar 304A and has its base end journaled on the outer periphery of the base plate 308.

The oscillating seal bar 304B can swing between a lying state in which its tip faces radially outward and an upright state in which it faces upward and is pressed against the fixed seal bar 304A. The oscillating seal bar 304B rotates about its base end by engaging a cam follower 304D with a cam 300B provided on the fixed part 300 below the oscillating seal bar 304B.

The outer bag web S2 runs while pressed against the fixed seal bar 304A, and when the oscillating seal bar 304B stands up and is pressed against the fixed seal bar 304A with the outer bag web S2 sandwiched between them, the outer bag web S2, which has been folded in half, is sandwiched between the fixed seal bar 304A and the oscillating seal bar 304B and welded together to form a side seal. In FIG. 6, the oscillating seal bar 304B in a lying position is shown by a dotted line, and the oscillating seal bar 304B in an upright position is shown by a solid line. Note that in FIG. 6, only the right side of the side seal portion 304 is shown, and the left side is omitted.

A hopper 30B is disposed above the side seal portions 304 and between the two side seal portions 304. The hoppers 30B are supported by hopper lifting mechanisms 306. The hoppers 30B are supported at the upper end of lifting shafts 306A that extend vertically of the hopper lifting mechanisms 306. The lifting shafts 306A are supported so as to be freely raised and lowered relative to the base plate 308, and are raised and lowered by the engagement of cam followers 306B and cams 306C provided at the lower end of the lifting shafts 306A.

The tubes 30C attached to each hopper 30B are connected to a gas supply pipe 30E laid inside the fixed shaft 300A via a rotary valve 30D provided between the fixed shaft 300A and the base plate 308, and are connected to a gas supply source 30F.

On the other hand, the upper rotating body 302B supports multiple inner bag holding devices 32 along the circumferential direction. The upper rotating body 302B is connected to a servo motor 305M via a gear 305 and can rotate in synchronization with the conveying speed of the outer bag web S2.

The inner bag holding devices 32 are disposed above each hopper 30B and supported by the holding device support section 310. The inner bag holding device 32 includes a gripper opening/closing mechanism 320 that opens and closes the gripper 32A, and the gripper opening/closing mechanism 320 is attached to the lower end of a vertically extending slide shaft 322. The slide shaft 322 can be raised and lowered relative to the block 324, which is supported by a link 326 held by the holding device support section 310 and incorporates a link mechanism (pitch expansion mechanism) (not shown). The link mechanism (pitch expansion mechanism) is driven by the engagement of three cam followers 42A, 42B, and 42C connected to the link mechanism (pitch expansion mechanism) with three cam grooves provided above the fixed shaft 300A and near the outer periphery of the upper rotating body 302B, thereby controlling the position and orientation of the block 324, i.e., the slide shaft 322.

The slide shaft 322 is provided with a cam follower 322A, for example, near its upper end. The cam follower 322A engages with a gripper lifting cam groove 47 formed along the outer surface of a cam member 46 formed in a cylindrical shape centered on the axis of the fixed shaft 300A (lifting means). In other words, the slide shaft 322 is lifted and lowered relative to the block 324 by the upper rotating body 302B being rotated and the cam follower 322A moving along the gripper lifting cam groove 47 (holding part lifting means).

The slide shaft 322 is hollow, and an elevation shaft 328 that opens and closes the gripper 32A is inserted therein. A cam follower 328A is provided at the upper end of the elevation shaft 328, and the cam follower 328A engages with a gripper opening and closing cam groove 48 formed above the gripper elevation cam groove 47 along the outer surface of the cam member 46. That is, the elevation shaft 328 moves up and down within the slide shaft 322 as the upper rotating body 302B rotates and the cam follower 328A moves along the gripper opening and closing cam groove 48. The lower end of the elevation shaft 328 is connected to the gripper opening and closing mechanism 320, and the opening and closing of the gripper 32A is controlled by the up and down movement of the elevation shaft 328.

As shown in the block diagram of FIG. 7, the drive of the servo motors 303M and 305M is controlled by the control device 44. The control device 44 receives rotation signals from the servo motors 303M and 305M and can control each of them independently by sending drive commands to each of them. In a first operating mode described below, the lower rotating body 302A and the upper rotating body 302B rotate integrally, and in a second operating mode, the lower rotating body 302A and the upper rotating body 302B rotate independently. For example, in the second operating mode, only the lower rotating body 302A or only the upper rotating body 302B can be rotated.

Next, the first and second operating modes of this embodiment will be described with reference to Figures 7, 8, and 9. The first operating mode is the normal operation during product production in which an inner bag (item) B1 is packed into an outer bag B2. Therefore, in the first operating mode, the lower rotating body 302A and the upper rotating body 302B are rotated integrally by the servo motors 303M and 305M, and the inner bag B1 manufactured by the inner bag packaging device 12 in the manner described above is separated into individual bags in the outer bag packaging device 14 and sealed into the outer bag B2.

On the other hand, the second operating mode is an operating mode used for adjustment work such as during a trial run. For example, if the adjustment time for either the inner bag web S1 or the outer bag web S2 takes longer than the other, it is necessary to operate only one of the bag packaging machines in order to perform the adjustment work without wasting the bag web. For this reason, in the second operating mode of this embodiment, the rotating body of the inner bag filling machine 30 of the outer bag packaging device 14 is separated into a lower rotating body 302A and an upper rotating body 302B that wrap around the outer bag web S2, and each can be operated independently as described above.

However, in the configuration of the inner bag filling machine 30, the gripper 32A is lowered to a height at which the inner bag B1 is inserted into the outer bag B2, so if the operation of one of the inner bag packaging device 12 and the outer bag packaging device 14 is stopped and the other is operated, the gripper 32A and the outer bag web S2 will interfere with each other. For this reason, the outer bag packaging device 14 of this embodiment is provided with a mechanism that stops the lifting and lowering of the gripper 32A in the second operating mode.

That is, the outer bag packaging device 14 of this embodiment is provided with a cam trajectory change mechanism in section A4 (see FIG. 2) that changes the trajectories of the gripper lifting/lowering cam groove 47 and the gripper opening/closing cam groove 48 and stops the lifting/lowering of the gripper 32A. FIGS. 8 and 9 are schematic diagrams showing the configuration of the cam trajectory change mechanism. FIGS. 8 and 9 are views of the cam member 46 in the vicinity of section A4 viewed radially outward, with FIG. 8 showing the first operating mode and FIG. 9 showing the second operating mode. Note that FIGS. 8 and 9 show multiple schematic positions of the cam followers 322A and 328A that move from the right side to the left side in each operating mode.

In the cam member 46, one gripper lifting cam groove 47 and one gripper opening/closing cam groove 48 are formed in each section except section A4, and the cam followers 322A and 328A each travel within a single cam groove 47 and 48. In other words, in sections except section A4, the gripper 32A is always operated in the same manner regardless of the selected operating mode.

Meanwhile, in section A4, the cam trajectory change mechanism allows the gripper lifting cam groove 47 to be switched between the gripper lifting cam groove 47A for the first operation mode and the gripper lifting cam groove 47B for the second operation mode, and the gripper opening/closing cam groove 48 to be switched between the gripper opening/closing cam groove 48A for the first operation mode and the gripper opening/closing cam groove 48B for the second operation mode. That is, in section A4, the gripper 32A is operated according to the selected operation mode.

The cam trajectory change mechanism has a pair of lifting cams 50, 52 on both ends of the cam member 46 (hatched areas in Figures 8 and 9). The lifting cams 50, 52 are block members that form part of the outer circumferential surface of the cam member 46, and are slidably fitted into a pair of lifting grooves formed along the generatrix of the outer circumferential surface of the cam member 46. The upper ends of the lifting cams 50, 52 are held by air cylinders 54, 56 supported by the cam member 46, and the lifting cams 50, 52 can be raised and lowered along the grooves.

In the section between the lifting cam 50 and the lifting cam 52 in the cam member 46, the gripper lifting cam groove 47A for the first operation mode, the gripper opening/closing cam groove 48A for the first operation mode, the gripper lifting cam groove 47B for the second operation mode, and the gripper opening/closing cam groove 48B for the second operation mode are formed. The gripper lifting cam groove 47A for the first operation mode and the gripper opening/closing cam groove 48A for the first operation mode are V-shaped, and the gripper 32A is lowered to the minimum height at which the inner bag B1 is inserted into the outer bag B2, and then raised to the maximum height again, and the gripper 32A is opened when the gripper 32A is lowered and closed when the gripper 32A is raised. On the other hand, the second operation mode gripper lifting cam groove 47B and the second operation mode gripper opening/closing cam groove 48B are substantially horizontal grooves formed at a height substantially corresponding to the cam grooves 47 and 48, and when the second operation mode gripper lifting cam groove 47B and the second operation mode gripper opening/closing cam groove 48B are used, the gripper 32A is not lowered and is not opened. In the second operation mode, the gripper 32A is not lowered, but may be opened in a predetermined section to discharge the inner bag B1 outside the system.

The lifting cams 50, 52 are provided with gripper lifting and lowering connection grooves 50A, 52A for the first operation mode to connect the cam grooves 47 formed in the cam members 46 on both sides of section A4 to the gripper lifting and lowering cam groove 47A for the first operation mode, and gripper opening and closing connection grooves 50B, 52B for the first operation mode to connect the cam grooves 48 to the gripper opening and closing cam groove 48A for the first operation mode. Gripper lifting and lowering connection grooves 50C, 52C for the second operation mode to connect to the gripper lifting and lowering cam groove 47B for the second operation mode, and gripper opening and closing connection grooves 50D, 52D for the second operation mode to connect to the gripper opening and closing cam groove 48B for the second operation mode are also provided.

As shown in FIG. 8, when the first operation mode is selected, the lifting cams 50, 52 are raised using the air cylinders 54, 56, and the cam grooves 47, 48 are connected to the first operation mode cam grooves 47A, 48A via the first operation mode gripper lifting communication grooves 50A, 52A and the first operation mode gripper opening/closing communication grooves 50B, 52B, respectively. On the other hand, when the second operation mode is selected, as shown in FIG. 9, the lifting cams 50, 52 are lowered using the air cylinders 54, 56, and the cam grooves 47, 48 are connected to the second operation mode cam grooves 47B, 48B via the second operation mode gripper lifting communication grooves 50C, 52C and the second operation mode gripper opening/closing communication grooves 50D, 52D, respectively.

As described above, in the filling and packaging machine of this embodiment, the lower rotating body around which the outer bag web is wrapped and the upper rotating body to which the inner bag is supplied are capable of rotating independently, so that one rotating part can be stopped while performing adjustment work by rotating the other rotating part, thereby reducing waste of materials such as bag webs during adjustment work. Also, in this embodiment, the lifting and lowering of the gripper can be stopped by switching the operating mode, so interference between the gripper and the bag can be prevented during any adjustment work.

10 Filling and packaging system 14 Outer bag packaging device (filling and packaging machine)
32 Bag holding device (filling unit)
47 Gripper lifting cam groove (lifting means)
302A Lower rotating body 302B Upper rotating body 303M, 305M Servo motor (driving means)
304 Side seal part (seal unit)
322A Cam follower (lifting means)
S2 Outer bag web (bag web)

Claims (1)

a rotating body to which the folded bag web is supplied;
a sealing unit provided on an outer periphery of the rotating body, around which the bag web folded in half is wound and which seals the bag web folded in half at predetermined intervals in a conveying direction to form bags;
a filling unit that is provided above the sealing unit of the rotating body and that can be raised and lowered to fill bags with the supplied articles;
a lifting means for lifting and lowering the filling unit,
The rotating body is
a lower rotating body in which the seal unit is disposed ;
An upper rotating body in which the filling unit is arranged,
the lower rotating body and the upper rotating body are each independently rotatable by a driving means ;
Furthermore, the lifting means can switch between a first operation mode in which the filling unit is lifted and lowered by switching a cam, and a second operation mode in which the filling unit is not lifted and lowered, and in the first operation mode, the lower rotating body and the upper rotating body are rotated integrally, and in the second operation mode, the lower rotating body and the upper rotating body are rotated independently.
A filling and packaging machine characterized by the above.

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