Filling and packaging machines

Abstract

To provide a filling and packaging machine that can suppress the waste of bag webs in the adjustment process.SOLUTION: In a filling and packaging machine of the present invention, a double-folded outer bag web is supplied to a lower rotating body 302A of an inner bag filling machine 30, and is hung around a side seal sections 304 provided on the outer periphery of the lower rotating body 302A and side-sealed at predetermined intervals in the conveyance direction to form an outer bag. A vertically movable gripper 32A is arranged above the side seal portion 304 of the lower rotating body 302A to insert the inner bag into the outer bag. The lower rotating body 302A and an upper rotating body 302B can be independently driven using servo motors 303M and 305M, respectively.SELECTED DRAWING: Figure 6

Description

[Technical field]

[0001] The present invention relates to a filling and packaging machine that fills articles from above into a web that is conveyed while folded in half. [Background technology]

[0002] As a filling 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 rear 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 rear 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 the side seals. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2019-199283 A Summary of the Invention [Problem to be solved by the invention]

[0004] In such a filling and packaging machine, a test run is required before the start of production to adjust the sealing unit that supplies 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 the adjustment time for the inner bag web is longer than the adjustment time for the outer bag web, the outer bag packaging machine must also be operated, resulting in the outer bags being wasted. The same applies if an abnormality occurs during production and adjustment is required for either machine.

[0005] An object of the present invention is to provide a filling and packaging machine that can reduce waste of bag webs during adjustment work. [Means for solving the problem]

[0006] 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 arranged to wrap the bag web folded in half and seal 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 being raised and lowered to fill bags with supplied articles, and a lifting means for lifting and lowering the filling unit, teeth The seal unit is disposed Ta The apparatus includes a lower rotating body and an upper rotating body in which the filling unit is disposed, and the lower rotating body and the upper rotating body are independently driven by a driving means. rotate It is possible Furthermore, the lifting means is capable of switching 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. It is characterized by the following. Effect of the Invention

[0009] According to the present invention, it is possible to provide a filling and packaging machine that can reduce waste of materials during adjustment work. [Brief description of the drawings]

[0010] [Figure 1] 1 is a perspective view of a filling and packaging system according to one embodiment of the present invention; [Diagram 2] FIG. 2 is a plan view of the filling and packaging system of FIG. 1. [Diagram 3] FIG. 2 is a partial cross-sectional side view of the product filling machine. [Figure 4] 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. [Diagram 5] 5 is an enlarged view of section A3 (see FIG. 2) in FIG. 4. [Figure 6] FIG. 2 is a partial cross-sectional side view of the inner bag filling machine. [Figure 7] FIG. 2 is a block diagram showing the relationship between a servo motor and a control device. [Figure 8] 4 is a development view of a cam groove illustrating the configuration of the cam track changing mechanism in a first operation mode. FIG. [Figure 9] 11 is a development view of a cam groove illustrating the configuration of the cam track changing mechanism in a second operation mode. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 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 an embodiment of the present invention, and Fig. 2 is a plan view.

[0012] 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 paid out from an inner bag payout section 16 and supplied to a product filling machine 18. The inner bag web S1 is paid out from an original roll 16A installed in the inner bag payout section 16, made horizontal by guide rollers 16B, and is also folded in half upward along the longitudinal direction before being supplied to the product filling machine 18.

[0013] The product filling machine 18 includes a rotor 18A that rotates about a vertical axis, and the inner bag web S1 folded in half travels in synchronization with the rotation of the rotor 18A along the outer periphery of the rotor 18A. In the upstream section (side seal section) A1, the inner bag web S1 folded in half and wrapped around the rotor 18A is sealed in the vertical direction at regular intervals along the longitudinal direction (side seal), forming it into a bag shape with an opening at the top.

[0014] Hoppers 18B are 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 on the further upstream side of the upstream section A1. Thereafter, the sides between the hoppers 18B are sealed in the upstream section A1, and in the downstream section (filling section) A2, the contents to be filled in the inner bag B1 are poured into each inner bag B1 from above. When filling is completed, the hopper 18B is raised, and the inner bag web S1 that has been divided into a number of inner bags B1 in the longitudinal direction by the side seal 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.

[0015] The inner bag web S1 is fed linearly via the guide rollers 20 toward the outer bag packaging device 14, and passes through a preheating device 22 and a top sealing device 24 where the upper side of the inner bag web S1 folded in half, i.e., the portion where the opening of each inner bag B1 is formed, is preheated along the longitudinal direction, 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.

[0016] 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 at a side seal position by the cutter 26, and separated into individual inner bags B1. As described below, each inner bag B1 separated from the inner bag web S1 is held by a mechanism provided in the outer bag packaging device 14, and is inserted into each outer bag B2.

[0017] In the outer bag packaging device 14, a long strip-shaped outer bag web S2 is paid out from the outer bag pay-out section 28 and supplied to the inner bag filling machine 30. The outer bag web S2 is paid out from an original roll 28A installed in the outer bag pay-out section 28, made horizontal by guide rollers 28B, and is folded upward in half along the longitudinal direction before being supplied to the inner bag filling machine 30.

[0018] The inner bag filling machine 30 includes a rotor 30A that rotates about a vertical axis, and the outer bag web S2 folded in half travels in synchronization with the rotation of the rotor 30A along the outer peripheral edge of the rotor 30A. The outer bag web S2 folded in half and wrapped around the rotor 30A is sealed in the vertical direction at regular intervals along the longitudinal direction (side seal) in the upstream section (side seal section) A3, and formed into a bag shape with an opening at the top.

[0019] The inner bag web S1, which is sent out linearly by the guide rollers 20 toward the outer bag packaging device 14, is positioned so as to substantially coincide with one outer peripheral tangent of the rotating body 30A of the inner bag filling machine 30. The cutter 26 is positioned so as to cut the inner bag web S1 at a position substantially corresponding 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 which 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) which holds the cut inner bag B1 and throws it into the corresponding hopper 30B, each of which can be raised and lowered.

[0020] 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 removed from the outer bag B2, and the orientation of the outer bag web S2 is changed via the guide roller 34, and like the inner bag web S1, its upper opening is sealed via the preheating section 36 and the top seal device 38, and the inner bags B1 are each sealed within the outer bag B2. The outer bag web S2 which has been sealed is cut at the side seal position by the cutter 40, completing the individual packaging of the inner bags B1 with the outer bags B2.

[0021] Next, with reference to the cross-sectional side view of product filling machine 18 in FIG. 3, the construction of product filling machine 18 will be described in more detail.

[0022] The rotating body 18A of the product filling machine 18 includes 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 plurality of side seal portions 184 are arranged around the periphery of the base plate 180 at regular intervals, around which the inner bag web S1 folded in half along the outer periphery is hung.

[0023] The side seal portion 184 comprises a fixed seal bar 184A standing upright upward from the base plate 180, and a swinging seal bar 184B positioned outside the fixed seal bar 184A and having its base end journalled on the outer periphery of the base plate 180. The swinging seal bar 184B is swingable 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 swinging seal bar 184B's rotation about its base end is controlled by the engagement of a cam follower 184D provided at the tip of a rotating lever 184E for rotating the swinging seal bar 184B with a cam groove 184C.

[0024] The inner bag web S1 runs while being pressed against the fixed seal bar 184A, and when the oscillating seal bar 184B stands up and is pressed against the fixed seal bar 184A with the inner bag web S1 sandwiched between it, the inner bag web S1 folded in half and overlapped is sandwiched between the fixed seal bar 184A and the oscillating seal bar 184B and welded to provide a side seal. In Fig. 3, the oscillating seal bar 184B in a lying state is shown on the left, and the oscillating seal bar 184B in an upright state is shown on the right.

[0025] 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 at the upper ends of lifting shafts 186A extending in the vertical direction of the hopper lifting mechanisms 186. The lifting shafts 186A are supported so as to be movable up and down relative to the base plate 180, and are raised and lowered by engagement between a cam follower 186B provided at the lower end of the lifting shafts 186A and a cam 186C. 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.

[0026] A tank 188 for storing the contents to be filled into the inner bag B1 is disposed above the rotor 18A, and a filling nozzle 188A for guiding the contents in the tank 188 to the hoppers 18B is provided above each hopper 18B. In the filling section A2, the contents in the tank 188 drop through the filling nozzle 188A and the hoppers 18B, and are poured into the inner bag B1.

[0027] 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 is a plan view showing 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 inserting section (downstream section) A4 as viewed radially outward, and Figure 5 is an enlarged view of section A3 in Figure 4.

[0028] 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 rear edge side seal L of the hopper 30B inserted immediately before. Thereafter, the rear 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 the side seal L.

[0029] Hopper 30B is inserted, and above outer bag web S2 which has been divided into individual outer bags B2 by side seals L, 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 inner bag filling machine 30. The upper part of each inner bag B1 of inner bag web S1 is gripped by gripper (holding portion) 32A of inner bag holding device (filling unit) 32 in sequence just before contact point P where the outer periphery of inner bag filling machine 30 and the linear trajectory of inner bag web S1 meet, and the inner bag B1 at the tip is cut off from inner bag web S1 by cutter 26 near contact point P. At this time, gripper 32A is protruded radially outward from the outer periphery of inner bag filling machine 30 by a link mechanism, and rotated so as to be parallel to the tangential direction in order to hold each inner bag B1 which moves along the tangential direction just before contact point P.

[0030] Furthermore, from the time when the inner bag B1 is held until the inner bag B1 is cut, the pitch of each gripper 32A is set to match the pitch D1 of the inner bag B1 formed on the inner bag web S1, but after cutting, the pitch 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. Thereafter, each gripper 32A is retracted radially inward and rotated in a direction along the outer periphery of the inner bag filling machine 30 to return 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.

[0031] Each gripper 32A that has started to move 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 then releases it. This causes the inner bag B1 to drop through the hopper 30B and be inserted into the outer bag B2 into which the hopper 30B has been inserted.

[0032] 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 extracted from the outer bag B2 before the outer bag web S2 reaches the guide roller 34. Thereafter, the hopper 30B and the gripper 32A are moved along the outer periphery of the inner bag filling machine 30, and when they reach just before the above-mentioned contact point P, the same operation is repeated.

[0033] 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 rotor 30A that rotates around the fixed shaft 300A via a bearing 301. The rotor 30A is composed of a lower rotor 302A and an upper rotor 302B.

[0034] The lower rotating body 302A includes a base plate 308 on which a side seal portion (seal unit) 304 and a hopper lifting mechanism 306 for holding the hopper 30B are arranged along the outer periphery. The lower rotating portion 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.

[0035] The outer bag web S2, folded in half, is wrapped around a plurality of side seal portions 304 arranged at regular intervals along the outer periphery of the base plate 308. The side seal portions 304 include a fixed seal bar 304A that stands upright upward from the base plate 308, and a swiveling seal bar 304B that is positioned outside the fixed seal bar 304A and has its base end journalled on the outer periphery of the base plate 308.

[0036] 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 swinging seal bar 304B rotates about its base end by engagement between a cam follower 304D and a cam 300B provided on the fixed part 300 below the swinging seal bar 304B.

[0037] The outer bag web S2 runs while being 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 therebetween, the outer bag web S2 folded in half and overlapped is sandwiched between the fixed seal bar 304A and the oscillating seal bar 304B and welded to form a side seal. In Fig. 6, the oscillating seal bar 304B in a lying state is shown by a dotted line, and the oscillating seal bar 304B in an upright state 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.

[0038] A hopper 30B is disposed above the side seal portions 304 and between the two side seal portions 304. The hoppers 30B are each supported by a hopper lifting mechanism 306. The hopper 30B is supported at the upper end of a lifting shaft 306A extending in the vertical direction of the hopper lifting mechanism 306. The lifting shaft 306A is supported so as to be able to rise and fall freely with respect to a base plate 308, and rises and falls due to engagement between a cam follower 306B provided at the lower end of the lifting shaft 306A and a cam 306C.

[0039] In addition, 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.

[0040] On the other hand, the upper rotating body 302B supports a plurality of 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 is capable of rotating in synchronization with the conveying speed of the outer bag web S2.

[0041] The inner bag holding devices 32 are disposed above the respective hoppers 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 is movable up and down relative to a block 324, which incorporates a link mechanism (pitch expansion mechanism) (not shown) and is supported by a link 326 held by the holding device support section 310. The link mechanism (pitch expansion mechanism) is driven by engagement between three cam followers 42A, 42B, 42C connected to the link mechanism (pitch expansion mechanism) and 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.

[0042] A cam follower 322A is provided, for example, near the upper end of the slide shaft 322. The cam follower 322A is engaged with a gripper lifting cam groove 47 formed along the outer surface of a cam member 46 formed in a cylindrical shape around the axis of the fixed shaft 300A (lifting means). That is, 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 unit lifting means).

[0043] Further, the slide shaft 322 has a hollow structure, through which an elevation shaft 328 for opening and closing the gripper 32A is inserted. A cam follower 328A is provided at the upper end of the elevation shaft 328, and the cam follower 328A is engaged 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 is rotated 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 performed by the up and down movement of the elevation shaft 328.

[0044] 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 transmits drive commands to each of them to control them independently. In a first operation mode described below, the lower rotating body 302A and the upper rotating body 302B rotate integrally, and in a second operation mode, the lower rotating body 302A and the upper rotating body 302B rotate independently. For example, in the second operation mode, only the lower rotating body 302A or only the upper rotating body 302B can be rotated.

[0045] Next, the first and second operation modes of this embodiment will be described with reference to Figures 7, 8, and 9. The first operation mode is a normal operation during product production in which an inner bag (article) B1 is packed into an outer bag B2. Therefore, in the first operation 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 above-mentioned manner is separated into individual bags in the outer bag packaging device 14 and enclosed in the outer bag B2.

[0046] On the other hand, the second operation mode is an operation mode used in adjustment work such as during a trial run. For example, if the adjustment time of 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. Therefore, in the second operation 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.

[0047] 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 or the outer bag packaging device 14 is stopped and the other is operated, the gripper 32A will interfere with the outer bag web S2. 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.

[0048] That is, the outer bag packaging device 14 of this embodiment is provided with a cam trajectory changing 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 changing mechanism. FIGS. 8 and 9 are developments of the cam member 46 in the vicinity of section A4 viewed radially outward, with FIG. 8 showing the first operation mode and FIG. 9 showing the second operation 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 operation mode.

[0049] In the cam member 46, in the sections other than the section A4, one each of a gripper lifting / lowering cam groove 47 and a gripper opening / closing cam groove 48 is formed, and the cam followers 322A, 328A run in the single cam grooves 47, 48. That is, in the sections other than the section A4, the gripper 32A is always operated in the same manner regardless of the selected operation mode.

[0050] On the other hand, in section A4, the cam trajectory changing mechanism can switch the gripper lifting / lowering cam groove 47 between the gripper lifting / lowering cam groove 47A for the first operation mode and the gripper lifting / lowering cam groove 47B for the second operation mode, and the gripper opening / closing cam groove 48 can 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.

[0051] The cam trajectory changing mechanism comprises a pair of lifting cams 50, 52 on both ends of the cam member 46 (hatched areas in Figs. 8 and 9). The lifting cams 50, 52 are block members that constitute 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.

[0052] In the section of cam member 46 between lifting cam 50 and lifting cam 52, gripper lifting cam groove 47A for the first operation mode, gripper opening / closing cam groove 48A for the first operation mode, gripper lifting cam groove 47B for the second operation mode, and gripper opening / closing cam groove 48B for the second operation mode are formed. Gripper lifting cam groove 47A for the first operation mode and gripper opening / closing cam groove 48A for the first operation mode are V-shaped and lower gripper 32A to a minimum height at which inner bag B1 is inserted into outer bag B2, and then raise it again to the maximum height, and gripper 32A is opened when gripper 32A is lowered and closed when gripper 32A is raised. On the other hand, the second operation mode gripper lifting / lowering 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, 48, and when the second operation mode gripper lifting / lowering cam groove 47B and the second operation mode gripper opening / closing cam groove 48B are used, the gripper 32A is not lowered or opened. Note that 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 to the outside of the system.

[0053] The lifting cams 50, 52 are provided with gripper lifting and lowering connection grooves 50A, 52A for the first operation mode for connecting 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 for connecting the cam groove 48 to the gripper opening and closing cam groove 48A for the first operation mode.In addition, gripper lifting and lowering connection grooves 50C, 52C for the second operation mode for connecting 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 for connecting to the gripper opening and closing cam groove 48B for the second operation mode are provided.

[0054] As shown in Fig. 8, when the first operation mode is selected, the lifting cams 50, 52 are lifted 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.

[0055] 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 the bag web 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. [Explanation of symbols]

[0056] 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 Rotor 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

[Claim 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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