Bag-making apparatus or packaging machine

Abstract

To provide a bag-making apparatus or a packaging machine which does not require a film guide for conveying a film along an appropriate position, does not cause a bag-making failure due to the contact of the film with the film guide, conveys the film along the appropriate position, prevents the occurrence of a defective product, and can appropriately make or package a bag.SOLUTION: The packaging machine P includes a film conveying mechanism 30 for delivering and conveying a film f, and a film holding roller 55,56 configured to suck or adsorb the film f on an outer peripheral surface 45 is arranged in a film conveying passage 57 of the film conveying mechanism 30.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a bag making device that continuously pays out a film to make a bag, or a packaging machine that packages an item to be packaged. [Background technology]

[0002] Various bag making devices that continuously pay out film to make bags or packaging machines that package items have been proposed. For example, the applicant of the present application has previously proposed a packaging machine equipped with a bag making device (JP 2012-25413 A: bag making and packaging machine).

[0003] This type of bag-making device or packaging machine equipped with a bag-making device has a film transport path for transporting the film, but if the film is not transported along the appropriate position, the bag or packaging will not be performed properly, resulting in defective products. Also, a film guide may be provided to transport the film along the appropriate position, but the film may come into contact with the film guide, resulting in defective bags. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2012-25413 Summary of the Invention [Problem to be solved by the invention]

[0005] Therefore, an object of the present invention is to provide a bag making device or packaging machine that does not require the installation of a film guide to transport the film along an appropriate position, does not cause the film to come into contact with the film guide and result in defective bag making, and can transport the film along an appropriate position, preventing the production of defective products and allowing for appropriate bag making or packaging. [Means for solving the problem]

[0006] The above problem is solved by a bag making device equipped with a film conveying mechanism that unwinds and conveys film, characterized in that a film holding roller configured to be able to suck or adsorb the film on its outer surface is arranged in the film conveying path of the film conveying mechanism (Claim 1).

[0007] Furthermore, what solves the above problem is a packaging machine equipped with a film conveying mechanism that unwinds and conveys film, characterized in that a film holding roller configured to be able to suck or adsorb the film on its outer circumferential surface is arranged in the film conveying path of the film conveying mechanism (Claim 2).

[0008] It is preferable that at least the outer periphery of the film holding roller is made of a porous material (claim 3). It is preferable that the film transport path of the film transport mechanism has a horizontal transport path that transports the film horizontally, and that the film holding roller is disposed in the horizontal transport path (claim 4). It is preferable that the film holding rollers are provided at least on the upstream and downstream sides of the film transport path (claim 5). The film holding rollers may be provided on both sides of the film being transported (claim 6). The film holding roller may be provided on one side of the film being transported (claim 7). The film transport mechanism has a direction changing roller, and the direction changing roller may be the film holding roller (claim 8). The film transport mechanism has a direction changing roller, and the direction changing roller is configured to be able to blow air from its outer periphery, and the film transport mechanism may be configured so that the direction changing roller can transport the film without contacting the film while blowing air from its outer periphery (claim 9). [Effects of the Invention]

[0009] According to the bag making device described in claim 1, there is no need to provide a film guide to transport the film along the appropriate position, and the film will not come into contact with the film guide, causing defective bag making.The film can be transported along the appropriate position, preventing the production of defective products and allowing for appropriate bag making or packaging. According to the packaging machine of claim 2, there is no need to provide a film guide to transport the film along the appropriate position, and the film will not come into contact with the film guide, causing defective bag production.The film can be transported along the appropriate position, preventing the production of defective products and allowing for appropriate bag production or packaging. According to the packaging machine of claim 3, a large number of pores are formed on the outer peripheral surface of the film holding roller, which allows for uniform suction or adsorption on the outer peripheral surface, thereby enabling the film to be held stably. According to the packaging machine described in claim 4, the film is transported while being sucked or adsorbed on the outer surface of the film holding roller, so that the film does not sag downward, making a film lower guide unnecessary and preventing the film from coming into contact with the film lower guide, thereby eliminating defective bag production. According to the packaging machine of claim 5, the film can be held more reliably, the film can be conveyed along a more appropriate position, the occurrence of defective products can be prevented, and bags or packaging can be performed more appropriately. According to the packaging machine of claim 6, the film can be held more reliably, the film can be conveyed along a more appropriate position, the occurrence of defective products can be prevented, and bags or packaging can be performed more appropriately. According to the packaging machine of claim 7, there is no need to provide a film guide to transport the film along the appropriate position, and the film does not come into contact with the film guide, resulting in defective bag production.The film can be transported along the appropriate position, preventing the production of defective products and allowing for appropriate bag production or packaging. According to the packaging machine of claim 8, the direction-changing rollers can suck or adsorb the film, so there is no need for a rotation drive mechanism for rotating the direction-changing rollers. According to the packaging machine described in claim 9, the film can be transported without contacting the direction-changing roller, and even when changing the direction of the film, a rotation drive mechanism for rotating the direction-changing roller is not required. Therefore, even highly adhesive films can be transported and static electricity can be prevented. [Brief explanation of the drawings]

[0010] [Figure 1] 1 is a front schematic view of an embodiment of a bag making apparatus of the present invention. [Figure 2] FIG. 2 is a vertical cross-sectional view illustrating a film holding roller in the bag making apparatus or packaging machine of the present invention. [Figure 3] 1 is a plan view of an embodiment of a packaging machine of the present invention. [Figure 4] FIG. 4 is a front view of the packaging machine shown in FIG. 3. [Figure 5] 4 is an explanatory diagram for explaining other effects of the packaging machine shown in FIG. 3.

[0023] FIG. [Figure 6] FIG. 4 is an explanatory diagram for explaining bag-making and packaging steps (1) to (5) of the packaging machine shown in FIG. [Figure 7] FIG. 4 is an explanatory diagram for explaining bag-making and packaging steps (6) to (12) of the packaging machine shown in FIG. [Figure 8] FIG. 4 is an explanatory diagram for explaining bag-making and packaging steps (13) to (18) of the packaging machine shown in FIG. [Figure 9] FIG. 4 is an explanatory diagram for explaining bag-making and packaging steps (19) to (23) of the packaging machine shown in FIG. DETAILED DESCRIPTION OF THE INVENTION

[0011] The present invention provides a bag making device or packaging machine equipped with a film conveying mechanism 30 that unwinds and conveys film f, and film holding rollers 55, 56 configured to be able to suck or adsorb film f on their outer peripheral surfaces 45 are arranged in the film conveying path 57 of the film conveying mechanism 30. This eliminates the need to provide a film guide to convey the film along the appropriate position, and prevents the film from coming into contact with the film guide, resulting in defective bag making. This allows the film to be conveyed along the appropriate position, preventing the production of defective products and enabling appropriate bag making or packaging. [Example]

[0012] The packaging machine of the present invention will be described with reference to an embodiment shown in FIGS. The packaging machine P of this embodiment is a packaging machine equipped with a film conveying mechanism 30 having a film conveying path 57 for unwinding and conveying the film f, and is characterized in that the film conveying path 57 of the film conveying mechanism 30 is provided with film holding rollers 55, 56 configured to be able to suck or adsorb the film f on their outer peripheral surfaces 45.

[0013] In this embodiment, the packaging machine P is a rotary-type bag-making and packaging machine equipped with a bag making device S, but the packaging machine of the present invention is not limited to this, and packaging machines in which a film holding roller configured to be able to suck or adsorb the film on its outer peripheral surface is arranged in the film transport path of a film transport mechanism are broadly included. For example, packaging machines in which a film holding roller configured to be able to suck or adsorb the film (continuous packaging bag) on ​​its outer peripheral surface is arranged in the film transport path of a pillow packaging machine (horizontal pillow packaging machine or vertical pillow packaging machine), or a bag feeding and packaging machine (for example, Patent Application No. 2021-153801) equipped with a bag feeding device having a packaging bag continuum feed mechanism (equivalent to a film conveying mechanism) for feeding the packaging bag continuum (equivalent to a film), a cutting mechanism for cutting the packaging bag continuum fed by the packaging bag continuum feed mechanism into individual packaging bags, and a packaging bag delivery mechanism for delivering the packaging bags cut by the cutting mechanism to the packaging section, are also broadly included in the category of packaging machines of the present invention.

[0014] 3 or 4, the packaging machine P of this embodiment is a packaging machine equipped with a film transport mechanism 30 having film feeds 31, 32 that unwind and transport film f from a rolled film roll R, a forming means 50 that folds the film f, and a bag making device S that has sealing means 60 that seals the end of the film f folded by the forming means 50, and the film transport path 57 of the film transport mechanism 30 is equipped with the bag making device S in which film holding rollers 55, 56 that are configured to be able to suck or adsorb the film f on their outer peripheral surfaces 45 are arranged, and a packaging unit T that fills and seals the packaging bag a made by the bag making device S with the packaged item. Each component will be described in detail below.

[0015] The packaging machine P of this embodiment is comprised of a bag making device S and a rotary type packaging section T, and is configured to automatically perform a series of operations from bag making to packaging, with a packaging capacity of 30 to 120 bags per minute. Here, each process and each component will be explained in order of the process of making bags in the bag making device S and the process of packaging the packaged items into the made packaging bags a.

[0016] The film conveying mechanism 30 is used to unwind the rolled film f and convey it to the packaging section T. As shown in FIG. 1, the film conveying mechanism 30 has a film feed 31 arranged on the upstream side and a film feed 32 arranged on the downstream side, and is configured to convey the film f.

[0017] Specifically, as shown in Figures 1, 3, 4, 6(1) or 6(3), the upstream film feed 31 has a pair of feed rollers 31a and 31b that are rotationally driven and controlled by a servo motor (not shown), and is configured to pay out film f from a film roll R that is rotatably mounted on a support part 38a of a setting table 38 and transport it downstream. Note that film f uses a film material that can be heat-sealed only on the inner side when it is made into packaging bag a.

[0018] On the other hand, the downstream film feed 32 has a pair of conveying rollers 32a, 32b that are rotationally driven and controlled by a servo motor (not shown), as shown in Figures 1, 3, 4 or 7 (12), and is configured to clamp the film f and feed and convey it toward the packaging section T.

[0019] 1, 3, or 4, film holding rollers 55, 56 configured to be able to suck or adsorb the film f on their outer peripheral surfaces 45 are arranged in the film conveying path 57 of the film conveying mechanism 30. This eliminates the need to provide a film guide to convey the film f along the appropriate position, and prevents the film f from coming into contact with the film guide, resulting in defective bag production. The film f is conveyed along the appropriate position, preventing the production of defective products and enabling appropriate bag production or packaging. Note that the film holding rollers in the present invention broadly encompass those configured to be able to suck or adsorb the film on their outer peripheral surfaces, and include those positioned in contact with the film as well as those positioned slightly apart from the film. Furthermore, in this embodiment, the film holding rollers 55, 56 are arranged so that the axial direction of the film holding rollers 55, 56 extends in a direction perpendicular to the transport direction of the film f, but they may be arranged in any direction as long as it is possible to transport the film f along an appropriate position by sucking or adsorbing the film f; for example, the film holding rollers 55, 56 may be arranged so that the axial direction of the film holding rollers 55, 56 extends in a direction parallel to the transport direction of the film f.

[0020] 1, 3, or 4, the film transport path 57 of the film transport mechanism 30 in the bag making device S has a horizontal transport path 57a that transports the film f horizontally, and film holding rollers 55, 56 are arranged on the horizontal transport path 57a. As a result, the film f is transported while being maintained at a predetermined horizontal level while being sucked or adsorbed by the outer circumferential surfaces 45 of the film holding rollers 55, 56, preventing the film f from dropping downward. This eliminates the need for a lower film guide and prevents the film from coming into contact with the lower film guide, thereby eliminating bag making defects. However, the film transport path of the film transport mechanism of the present invention is not limited to one having a horizontal transport path; for example, a film transport path of the film transport mechanism arranged vertically is also included in the scope of the present invention.

[0021] As in this embodiment, film holding rollers 55, 56 are preferably provided at least on the upstream and downstream sides of film transport path 57. This allows film f to be held more reliably, allowing film f to be transported along a more appropriate position, preventing the occurrence of defective products and enabling more appropriate bag making or packaging. However, the film holding rollers of the present invention are not limited to those provided on the upstream and downstream sides of the film transport path; for example, those provided with only one roller or those provided with two or more rollers are also broadly included within the scope of the present invention.

[0022] Film holding rollers 55, 56 are provided on both sides of the film f being conveyed. This allows the film f to be held more securely, allowing the film f to be conveyed along a more appropriate position, preventing the occurrence of defective products and enabling more appropriate bag making or packaging. In this embodiment, as shown in Figure 3, pairs of film holding rollers 55 (55a, 55b) and 56 (56a, 56b) are provided on both sides of the film f being conveyed, respectively. However, the scope of the present invention also broadly encompasses configurations in which film holding rollers are provided on both sides of the film f in a staggered (alternate) pattern along the film conveyance path, or in which film holding rollers are provided on one side of the film being conveyed.

[0023] The film transport mechanism 30 has direction-changing rollers 33, 34, 35, and 36, which may be configured as film-holding rollers (rollers configured to be able to suck or adsorb the film on their outer circumferential surfaces). In this way, as shown in Figure 6 (2), the direction-changing rollers 33, 34, 35, and 36 can suck or adsorb the film f, eliminating the need for a rotation drive mechanism to rotate the direction-changing rollers 33, 34, 35, and 36.

[0024] 5 (although FIG. 5 is a diagram of direction changing roller 33, the same applies to direction changing rollers 34, 35, 36), and direction changing rollers 33, 34, 35, 36 are configured to be able to blow air from outer circumferential surface 45, so that direction changing rollers 33, 34, 35, 36 are able to convey film f without contact with film f while blowing air from outer circumferential surface 45. This allows the film to be conveyed without contact with direction changing rollers 33, 34, 35, 36, and even when changing the direction of film f, no rotation drive mechanism is required to rotate direction changing rollers 33, 34, 35, 36, and conveying can be done without contact, which makes it possible to convey even highly adhesive films and prevents static electricity from being generated.

[0025] Note that, although the film holding rollers 55, 56 in this embodiment are configured to be able to suck or adsorb the film f from the outer peripheral surface 45, the film holding rollers 55, 56 may also be configured to be able to blow air from the outer peripheral surface 45, thereby allowing the film holding rollers 55, 56 themselves and the film f to be dried by the air blown from the outer peripheral surface 45. That is, in this embodiment, the film holding rollers 55, 56, the direction changing rollers 33, 34, 35, 36, 37, and the laminating rollers 53, 54 are all configured to be able to suck or adsorb the film f on the outer peripheral surface 45, and are also configured to be able to blow air from the outer peripheral surface 45.

[0026] The structure shown in FIG. 2 realizes the configuration in which the outer peripheral surface 45 is capable of sucking or adsorbing the film f and blowing air from the outer peripheral surface 45. For example, as shown in FIG. 2, the direction changing roller 33 has a rotating shaft 46 and a cylindrical portion 47 rotatably mounted around the rotating shaft 46, with the outer peripheral portion 48 of the cylindrical portion 47 being made of a porous material. The hollow portion 49 within the cylindrical portion 47 is connected to a gas control device (e.g., a pump) 39, and is configured to enable sucking or adsorption at the outer peripheral surface 45 (the numerous pores formed in the porous material of the outer peripheral portion 48) and to enable air to be blown evenly from the outer peripheral surface 45. The film holding rollers 55, 56, the direction changing rollers 34, 35, 36, 37, and the laminating rollers 53, 54 are all configured similarly to the direction changing roller 33, and are configured to enable sucking or adsorbing the film f at the outer peripheral surface 45 and to enable air to be blown from the outer peripheral surface 45.

[0027] The direction-changing rollers 33, 34, and 36 are guide rollers for changing direction, and the direction-changing roller 35 is a dancer roller that moves up and down.

[0028] In this embodiment, outer periphery 48 of cylindrical portion 47 is made of a porous body (cylinder), which forms a large number of pores on outer periphery 45 of film holding rollers 55, 56, direction changing rollers 34, 35, 36, 37, and laminating rollers 53, 54, making it possible to uniformly suck or adsorb on outer periphery 45 and to uniformly blow out air. However, the outer periphery of the cylindrical portion is not limited to a porous body, and the outer periphery may be made of any material or structure as long as it is possible to suck or adsorb on the outer periphery and to blow out air.

[0029] Any porous body may be used, but for example, a ceramic porous body can be suitably used, and suitable materials for the porous body include, for example, aluminum oxide, silicon oxide, zirconium oxide, silicon nitride, silicon carbide, titanium carbide, and tungsten carbide.

[0030] The forming means 50 for folding the film f folds the unwound film f in half to form the bottom. As shown in FIG. 6(4), a triangular forming plate 51 folds the film f in half in the longitudinal direction with both side edges facing upward, then a spatula (folding means) 52 provided at the apex of the forming plate 51 folds the film f in half to form a folded portion c at the bottom. The film f is then folded by a pair of alignment rollers 53, 54 provided upright near the apex. A pair of film holding rollers 55 (film holding roller 55a, film holding roller 55b) are provided downstream of the pair of alignment rollers 53, 54 (one on each side of the film f) to maintain the vertical level of the film f being conveyed upstream of the horizontal conveyance path 57a. In this embodiment, the film holding roller 55 provided upstream of the film conveyance path 57 is provided downstream of the pair of alignment rollers 53, 54, but the pair of alignment rollers 53, 54 may also serve as film holding rollers.

[0031] The sealing means 60 is used to seal the end of the film f folded over by the forming means 50, and the end of the film f is heat-sealed as follows.

[0032] First, as shown in Fig. 6(5), a bottom seal is applied to the bottom portion e of the folded film f by bottom sealing means 61. This bottom sealing means 61 has a pair of heat sealing bars 61a, 61b, and is configured so that the height of the sealing position can be adjusted to match the length of the packaging bag to be produced. After that, the area where the bottom seal was applied is immediately cooled by the pressure contact action of cooling bars 62a, 62b, as shown in Fig. 7(6).

[0033] Next, as shown in Figure 7(7), the folded film f is vertically sealed by vertical sealing means 63, 64. The vertical sealing means 63, 64 has two pairs of heat sealing bars 63a, 63b and 64a, 64b arranged in parallel, and is configured to completely seal the side edges of each bag width by two heat treatments according to the bag size to be manufactured. The heat-sealed areas are immediately cooled by the pressure action of cooling bars 65a, 65b, as shown in Figure 7(8).

[0034] As shown in FIG. 7(9), the film f with the vertical seal has the date of manufacture, expiration date, etc. printed on it by a printing device (an inkjet printer in this embodiment).

[0035] As shown in Figure 7 (10), a pair of film holding rollers 56 (film holding roller 56a, film holding roller 56b) are provided downstream of the printing device 42 (one on each side of the film f), which maintain the vertical level of the film f being transported downstream of the horizontal transport path 57a.

[0036] Furthermore, as shown in Figure 7 (11) or 7 (12), after mark misalignment is confirmed by mark sensor 43, downstream film feed 32 (having a pair of feed rollers 32a, 32b whose rotation is controlled by a servo motor (not shown)) clamps and conveys film f. Specifically, marks provided on film f at regular intervals to match the bag width are detected by mark sensor 43, and the servo motor drives and rotates the pair of feed rollers 32a, 32b, adjusting the rotation speed and stopping the rollers, thereby feeding film f downstream in synchronization with the film feed 31 described above.

[0037] As shown in FIG. 8(13), the printed film f is cut by a cutter 44 at the center of the vertical seal of the uncut continuous bag body, and the packaging bags a are produced one by one.

[0038] The packaging bag a made by the bag making device S is filled with the packaged item in a packaging section T provided downstream of the bag making device S and sealed.

[0039] The packaging section T in this embodiment is configured as a rotary type as shown in Figure 3 or Figure 4, and the main body 70 has a number of grip pairs 71 that support the packaging bags a in a hanging state, protruding in the radial direction of a rotor 72, as shown in Figure 4, and each grip pair 71 is intermittently rotated and moved to each of ten stations, namely, a bag making and transferring station (14), a zipper opening station (15), a bag inflation station (16), a bag opening station (17), a packaged product filling station (18), packaged product vibration and blowing stations (19), (20), a jam detection station (21), a top sealing station (22), and a seal cooling and product removal station (23), to automatically perform the packaging process.

[0040] Specifically, in the bag making and transferring station (14), as shown in Figure 8 (14), the packaging bag a is transferred to a pair of grips 71 that are sequentially sent by the bag transferring device 40. Thereafter, the packaging bag a is gripped in a hanging manner and rotated intermittently.

[0041] At the zipper opening station (15), as shown in Figure 8 (15), the zipper opening device 73 grips the bag near the opening on the front and back sides and opens them outward, thereby opening the zipper.

[0042] At the bag inflation station (16), compressed air is blown into the bag from a nozzle 74, as shown in FIG. 8 (16), to expand the bottom portion.

[0043] In the bag opening station (17), as shown in FIG. 8 (17), the bag opening b is opened by the suction action of a pair of suction cups 75a, 75b.

[0044] At the product filling station (18), as shown in Figure 8 (18), a predetermined amount of product such as powdered seasoning, sugar, salt, seeds, etc. is poured into the filling funnel 76 and filled into the packaging bag a.

[0045] In the packaged item vibration and blowing stations (19), (20), as shown in Figure 9 (19), (20), the bottom of the packaging bag a is vibrated by a vibrating element 77 to level the packaged items, and the vicinity of the bag opening is cleaned by spraying compressed air from a nozzle 74 inserted into the bag opening.

[0046] In the jam detection station (21), as shown in FIG. 9 (21), the jam detection unit 78 detects whether or not the packaged item is jammed near the bag opening.

[0047] In the top sealing station (22), as shown in FIG. 9 (22), a pair of sealing bars 79a, 79b seal the opening of the bag.

[0048] In the seal cooling / product removal station (23), as shown in Figure 9 (23), the sealed area is cooled by a pair of cooling bars 80a, 80b, and then the product is discharged outside the machine via a chute 81. [Explanation of symbols]

[0049] S bag making equipment T packaging department P packaging machine R film roll f film a packaging bag b Bag opening c Folded part e bottom 30 Film transport mechanism 31 Film advance 31a, 31b Feed rollers 32 Film advance 32a, 32b Feed rollers 33, 34, 35, 36 Direction change rollers 38 sets 38a Support part 39 Gas control device 40 Bag transfer device 41 Roller 42 Printing device 43 Mark Sensor 44 Cutter 45 Outer surface 46 Rotating shaft 47 Cylindrical body 48 Outer periphery 49 Cavity 50 Forming means 51 Molded plate 52 Spatula (folding means) 53,54 Alignment roller 55,56 Film holding roller 57 Transport path 60 Sealing means 61 Bottom sealing means 61a, 61b Heat sealing bar 62a, 62b Cooling bar 63,64 Vertical sealing means 63a, 63b, 64a, 64b Heat sealing bar 65a, 65b Cooling bar 70 Main body 71 Grip Pair 72 Rotating Body 73 Zipper opening device 74 nozzles 75a,75b sucker 76 Filling funnel 77 Vibration piece 78 Biting detection unit 79a, 79b Seal bar 80a, 80b Cooling bar 81 shots 90,91 Roller

Claims

1. A bag making device equipped with a film transport mechanism that unwinds and transports a film, characterized in that a film holding roller configured to be able to suck or adsorb the film on its outer circumferential surface is arranged in the film transport path of the film transport mechanism.

2. A packaging machine equipped with a film transport mechanism that unwinds and transports a film, characterized in that a film holding roller configured to be able to suck or adsorb the film on its outer circumferential surface is arranged in the film transport path of the film transport mechanism.

3. 3. The packaging machine according to claim 2, wherein at least the outer periphery of the film holding roller is made of a porous material.

4. 3. The packaging machine according to claim 2, wherein the film transport path of the film transport mechanism includes a horizontal transport path that transports the film horizontally, and the film holding roller is disposed on the horizontal transport path.

5. 3. The packaging machine according to claim 2, wherein the film holding rollers are provided at least on the upstream side and downstream side of the film transport path.

6. 3. The packaging machine according to claim 2, wherein the film holding rollers are provided on both sides of the film being conveyed.

7. 3. The packaging machine according to claim 2, wherein the film holding roller is provided on one side of the film being transported.

8. 3. The packaging machine according to claim 2, wherein the film transport mechanism has a direction changing roller, and the direction changing roller is the film holding roller.

9. 3. The packaging machine according to claim 2, wherein the film transport mechanism has a direction-changing roller, the direction-changing roller being configured to be able to blow air from its outer peripheral surface, and the film transport mechanism is configured so that the direction-changing roller can transport the film without contacting the film while blowing air from its outer peripheral surface.

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