Bag making apparatus and bag making and packaging machine including the same

Abstract

To provide a bag-making apparatus which dispenses with a rotary drive device for rotating a roller even when changing the direction of a film, can dry the roller and the film by a simple drying mechanism, and can convey even a highly adhesive film, and to provide a bag-making and packaging machine equipped with the bag-making apparatus.SOLUTION: The bag-making device S includes a film conveying mechanism 30 having a film feeder 31,32 for feeding and conveying a film f wound in a roll shape, a molding means 50 for folding the film f, and a sealing means 60 for sealing an end of the film f folded by the molding means 50, wherein the film conveying mechanism 30 has a roller 33,34,35,36,37 configured to blow air from an outer peripheral surface 45. The roller 33,34,35,36,37 is configured to be able to convey the film f by the film feeder 31,32 in non-contact with the film f while blowing air from the outer peripheral surface 45.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a bag making device that continuously produces packaging bags from a film wound in a roll shape, and a bag making and packaging machine equipped with the same. [Background technology]

[0002] Various bag making devices or form-fill-seal machines equipped with bag making devices that continuously produce packaging bags from rolled film have been proposed in the past, including a form-fill-seal machine previously proposed by the applicant of the present application (Japanese Patent Application Laid-Open No. 2012-25413).

[0003] Conventional bag-making machines required a rotation drive mechanism to rotate the rollers so that the film could be brought into contact with the rollers and conveyed while being transformed in the required direction. Furthermore, a drying mechanism was required because the printing surface, printed by a printing device (e.g., an inkjet printer), would be distorted if it came into contact with the rollers while still wet. Furthermore, a drying mechanism was also required to dry any liquid adhering to the rollers or film after cleaning. Furthermore, there was the problem that highly adhesive films were difficult to convey. [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, the object of the present invention is to provide a bag making device and a bag making and packaging machine equipped with the same that does not require a rotary drive mechanism to rotate the rollers even when changing the direction of the film, can dry the rollers and film with a simple drying mechanism, and can transport even highly adhesive films. [Means for solving the problem]

[0006] The above problem is solved by a bag making device that includes a film conveying mechanism with a film feed that unwinds and conveys a rolled-up film, a forming means that folds the film, and a sealing means that seals the ends of the film that has been folded by the forming means, wherein the film conveying mechanism has a roller that is configured to be able to blow air from its outer peripheral surface, and the roller is configured to be able to convey the film by the film feed without coming into contact with the film while blowing air from its outer peripheral surface (Claim 1).

[0007] It is preferable that at least the outer periphery of the roller is made of a porous material (Claim 2). It is preferable that the bag making device has a printer, and that the roller is provided downstream of the printer at a position separated from the film being transported (Claim 3). The rollers may be provided on both sides of the film being transported at a position separated from the film being transported (Claim 4). The rollers may be configured to be able to suck the film from the outer periphery (Claim 5).

[0008] Also, what solves the above problem is a bag making device having a film transport mechanism with a film feed that unwinds and transports a rolled film, a forming means that folds the film, and a sealing means that seals the end of the film that has been folded by the forming means, wherein the film transport mechanism has a roller configured to be able to blow air from its outer circumferential surface, and the bag making device is configured so that the roller can transport the film by the film feed without coming into contact with the film while blowing air from its outer circumferential surface, and a bag making and packaging machine equipped with the bag making device, characterized in that it has a packaging unit that is provided downstream of the bag making device and fills and seals the packaging bag made by the bag making device with the packaged item (Claim 6). [Effects of the Invention]

[0009] According to the bag making device described in claim 1, a rotation drive mechanism for rotating the rollers is not required even when changing the direction of the film, and the rollers and film can be dried using a simple drying mechanism, making it possible to transport even highly adhesive films. According to the bag making device of claim 2, a large number of pores are formed on the outer peripheral surface of the roll, which allows air to be blown out evenly from the outer peripheral surface, enabling stable non-contact transport of the film. According to the bag making device of claim 3, the printed surface of the film can be dried with a simple drying mechanism. According to the bag making device of claim 4, the film can be dried from both sides with a simple drying mechanism. According to the bag making device of claim 5, the film can also be conveyed in contact with the rollers. According to a bag making and packaging machine equipped with the bag making device described in claim 6, a rotary drive mechanism for rotating the rollers is not required even when changing the direction of the film, and the rollers and film can be dried using a simple drying mechanism, making it possible to transport even highly adhesive films. [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] 2 is a vertical cross-sectional view illustrating a roller of the bag making apparatus shown in FIG. 1. FIG. [Figure 3] 2 is an explanatory view (front view) for explaining the action of rollers in the bag making apparatus shown in FIG. 1. FIG. [Figure 4] 2 is an explanatory view (front view) for explaining the action of rollers in the bag making apparatus shown in FIG. 1. FIG. [Figure 5] 2 is an explanatory view (front view) for explaining the action of rollers in the bag making apparatus shown in FIG. 1. FIG. [Figure 6] 2 is an explanatory view (front view) for explaining the action of rollers in the bag making apparatus shown in FIG. 1. FIG. [Figure 7]2 is an explanatory diagram (plan view) for explaining the action of rollers in the bag making apparatus shown in FIG. 1. FIG. [Figure 8] 1 is a plan view of an embodiment of a bag-making and packaging machine equipped with a bag-making device of the present invention. [Figure 9] 9 is a front view of a bag-making and packaging machine equipped with the bag-making device shown in FIG. 8. [Figure 10] 9 is an explanatory diagram for explaining bag-making and packaging steps (1) to (5) of a bag-making and packaging machine equipped with the bag-making device shown in FIG. 8. FIG. [Figure 11] 9 is an explanatory diagram for explaining bag-making and packaging steps (6) to (12) of a bag-making and packaging machine equipped with the bag-making device shown in FIG. 8. FIG. [Figure 12] 9 is an explanatory diagram for explaining bag-making and packaging steps (13) to (18) of a bag-making and packaging machine equipped with the bag-making device shown in FIG. 8. FIG. [Figure 13] 9 is an explanatory diagram for explaining bag-making and packaging steps (19) to (23) of a bag-making and packaging machine equipped with the bag-making device shown in FIG. 8. FIG. [Figure 14] 10 is an explanatory view (plan view) for explaining the action of rollers in another embodiment of the bag making apparatus of the present invention. FIG. [Figure 15] 10 is an explanatory view (plan view) for explaining the action of rollers in another embodiment of the bag making apparatus of the present invention. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0011] The present invention provides a bag making device having a film conveying mechanism 30 equipped with film feeds 31, 32 that pay out and convey a rolled-up film f, a forming means 50 that folds the film f, and a sealing means 60 that seals the end of the film f that has been folded by the forming means 50, and the film conveying mechanism 30 has rollers 33, 34, 35, 36, 37 that are configured to be able to blow air from their outer peripheral surface 45, and the rollers 33, 34, 35, 36, 37 are configured to be able to convey the film f by film feeds 31, 32 without coming into contact with the film f while blowing air from their outer peripheral surface 45. This eliminates the need for a rotary drive mechanism to rotate the rollers even when changing the direction of the film, and enables the rollers and film to be dried with a simple drying mechanism, resulting in a bag making device S and a bag making and packaging machine P equipped with the same that are capable of conveying even highly adhesive films. [Example]

[0012] A bag-making and packaging machine equipped with a bag-making device of the present invention will be described using one embodiment shown in FIGS. 1 to 13. FIG. The bag-making packaging machine P of this embodiment is a bag-making packaging machine equipped with a bag-making device S having a film transport mechanism 30 having film feeds 31, 32 that unwind and transport a rolled-up film f, a forming means 50 that folds the film f, and a sealing means 60 that seals the end of the film f that has been folded by the forming means 50. The film transport mechanism 30 has rollers 33, 34, 35, 36, 37 that are configured to be able to blow air from their outer peripheral surface 45, and the bag-making device S is configured so that the rollers 33, 34, 35, 36, 37 can transport the film f by the film feeds 31, 32 without coming into contact with the film f while blowing air from their outer peripheral surface 45, and a packaging section T that is located downstream of the bag-making device S and fills and seals the packaging bag a made by the bag-making device S with the packaged item.

[0013] The bag-making and packaging machine P of this embodiment is composed 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 step and each component of packaging items into packaging bags a made by the bag-making device S will be explained in order.

[0014] 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.

[0015] Specifically, as shown in Figures 1, 8, 9, 10(1) and 10(3), the upstream film feed 31 has a pair of feed rollers 31a, 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.

[0016] 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, 8, 9, and 11 (12), and is configured to clamp the film f and feed and convey it toward the packaging section T.

[0017] 1 or 2, film transport mechanism 30 has rollers 33, 34, 35, 36, and 37 and mating rollers 53 and 54 configured to be able to blow air from outer peripheral surface 45. Rollers 33, 34, and 36 are guide rollers for changing direction, roller 35 is a dancer roller that moves up and down, and roller 37 is a drying roller for drying the printed surface printed by printing device 42. Note that while Fig. 2 is a vertical cross-sectional view of roller 33, rollers 34, 35, 36, and 37 and mating rollers 53 and 54 are configured in the same way.

[0018] 2, roller 33 has a rotating shaft 46 and a cylindrical body 47 that is rotatable around rotating shaft 46, and an outer circumferential portion 48 of cylindrical body 47 is made of a porous material. Also, a hollow portion 49 inside cylindrical body 47 communicates with a gas control device (e.g., a pump) 39, and is configured to be able to blow air evenly from outer circumferential surface 45 (a large number of pores formed in the porous material of outer circumferential portion 48).

[0019] 3, 4, 5, 6, or 10(2), rollers 33, 34, 35, and 36 are configured to blow air from their outer circumferential surfaces 45, thereby enabling the film f to change direction without contacting the film, and the film f is transported via film feeds 31 and 32. This eliminates the need for a rotation drive mechanism to rotate rollers 33, 34, 35, and 36 when changing the direction of the film f, and allows for contactless transport, making it possible to transport even highly adhesive films and preventing the generation of static electricity. Furthermore, rollers 33, 34, 35, 36, and 37 and the film f can be dried.

[0020] In this embodiment, the outer peripheral portion 48 of the cylindrical portion 47 is made of a porous body (cylindrical body), which forms a large number of pores on the outer peripheral surface 45 of the rollers 33, 34, 35, 36, and 37, making it possible to blow air evenly from the outer peripheral surface 45 and enabling stable non-contact transport of the film f, which is preferable, but is not limited to a porous body, and the outer peripheral portion may be made of any material or structure as long as it is possible to blow air from the outer peripheral surface 45 and enable non-contact transport.

[0021] In this embodiment, rollers 33, 34, 35, 36, 37 and laminating rollers 53, 54 are configured to be able to suck film f from outer peripheral surface 45. This allows film f to be adsorbed to rollers 33, 34, 35, 36, 37 and laminating roller 53, allowing contact conveyance. In addition, in a make-and-seal machine P equipped with bag making device S shown in Figure 8 or 9, a vacuum pump can be connected to roller 37 and laminating rollers 53, 54 while conveying film f, so that film f is conveyed while being sucked, preventing film f from sagging downward, eliminating the need for a lower film guide, and preventing defective bag making because film f does not come into contact with the lower film guide.

[0022] 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.

[0023] The forming means 50 for folding the film f is for folding the unwound film f in half to form the bottom portion, and as shown in Figure 10 (4), it is configured so that it folds the film f in half in the longitudinal direction with both side edges facing upward using a triangular forming plate 51, then folds it in half using a spatula (folding means) 52 provided at the apex of the forming plate 51 to form a mountain fold at the bottom portion c, and then it is overlapped by a pair of alignment rollers 53, 54 provided upright near the apex position.

[0024] 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.

[0025] First, as shown in Figure 10(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 Figure 11(6).

[0026] Next, as shown in Figure 11(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 11(8).

[0027] As shown in FIG. 11(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).

[0028] Thereafter, the printed surface printed by the printing device 42 is dried by a roller (drying roller) 37, as shown in Figure 7 or Figure 11 (10). Specifically, the roller (drying roller) 37 is disposed at a position spaced apart from the film f, and the roller 37 blows air from its outer peripheral surface 45 to dry the printed surface printed by the printing device 42. In this way, the bag making apparatus S of this embodiment is configured so that the film f can be dried with a simple drying mechanism (roller 37).

[0029] 11(11) or 11(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 film feed 31 described above.

[0030] As shown in FIG. 12(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.

[0031] 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.

[0032] The packaging section T in this embodiment is configured as a rotary type as shown in Figure 8 or Figure 9, and the main body 70 has a large 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 9, 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.

[0033] Specifically, at the bag making and transferring station (14), as shown in Figure 12 (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.

[0034] At the zipper opening station (15), as shown in Figure 12 (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.

[0035] At the bag inflation station (16), compressed air is blown into the bag from a nozzle 74, as shown in FIG. 12 (16), to expand the bottom portion.

[0036] In the bag opening station (17), as shown in FIG. 12 (17), the bag opening b is opened by the suction action of a pair of suction cups 75a, 75b.

[0037] At the product filling station (18), as shown in Figure 12 (18), a predetermined amount of powdered seasoning, sugar, salt, seeds, etc. is poured into the filling funnel 76 and filled into the packaging bag a.

[0038] In the packaged item vibration and blowing stations (19), (20), as shown in Figure 13 (19), (20), the bottom of the packaging bag a is vibrated by a vibrating element 77 to level the packaged items, and compressed air is sprayed from a nozzle 74 inserted into the bag opening to clean the area around the bag opening.

[0039] In the jam detection station (21), as shown in FIG. 13 (21), the jam detection unit 78 detects whether or not the packaged item is jammed near the bag opening.

[0040] In the top sealing station (22), as shown in FIG. 13 (22), a pair of sealing bars 79a, 79b seal the opening of the bag.

[0041] In the seal cooling / product removal station (23), as shown in Figure 13 (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.

[0042] It should be noted that the packaging machine equipped with the bag making device of the present invention is not limited to the rotary bag making and packaging machine P as in this embodiment, but rather broadly includes packaging machines equipped with a bag making device that uses rollers to make bags, and for example, pillow packaging machines are also included in the scope of the present invention.

[0043] Next, another embodiment of the bag making apparatus of the present invention shown in FIG. 14 will be described. The bag making apparatus S2 of this embodiment differs from the previously described bag making apparatus S in that the roller (drying roller) 37 of the previously described bag making apparatus S is positioned away from the film f, and as shown in FIG. 7, the roller 37 dries the printed surface of the film f, which is transported straight across the drawing, by blowing air from its outer circumferential surface 45, whereas the roller (drying roller) 41 of the bag making apparatus S2 dries the printed surface by blowing air from its outer circumferential surface 45 and also changes the direction of the film f without contacting it. The same components are designated by the same reference numerals and their descriptions are omitted. Thus, a bag making apparatus having a roller that dries the printed surface of the film f while also changing the direction of the film f without contacting it is also included in the scope of the present invention.

[0044] Next, another embodiment of the bag making apparatus of the present invention shown in FIG. 15 will be described. The bag making apparatus S3 of this embodiment differs from the bag making apparatus S described above only in that it has rollers (drying rollers) 90, 91 arranged on both sides of the film f, and the rest is the same. Identical components are given the same reference numerals and their explanations are omitted. In this way, the category of bag making apparatuses of the present invention also includes those in which rollers (drying rollers) are arranged on both sides of the film f to dry both sides (in cases where a process for washing the film f is included or where both sides of the film f have printed surfaces) and to change the direction of the film f without contact.

[0045] As described above, the bag making apparatus of the present invention and the bag making and packaging machine equipped with it broadly include those in which the film conveying mechanism has a roller configured to be able to blow air from its outer peripheral surface, or a roller configured to be able to adsorb a film on its outer peripheral surface, thereby making it possible to dry the roller itself or the film, to change the direction of the film without contact, or to adsorb a film on its outer peripheral surface and convey it by contact. [Explanation of symbols]

[0046] S bag making equipment T packaging department P Bag making and 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, 37 Roller 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 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 comprising a film transport mechanism with a film feed that unwinds and transports a rolled film, a forming means that folds the film, and a sealing means that seals the ends of the film that has been folded by the forming means, wherein the film transport mechanism has a roller that is configured to be able to blow air from its outer circumferential surface, and the roller is configured to be able to transport the film by the film feed without coming into contact with the film while blowing air from its outer circumferential surface.

2. 2. The bag making apparatus according to claim 1, wherein at least the outer periphery of the roller is made of a porous material.

3. 3. The bag making apparatus according to claim 1, further comprising a printer, and the roller is provided downstream of the printer at a position separated from the film being conveyed.

4. 2. The bag making apparatus according to claim 1, wherein the rollers are disposed on both sides of the film being conveyed and spaced apart from each other.

5. The bag making apparatus according to claim 1, wherein the roller is configured to be able to suck the film from the outer peripheral surface.

6. a bag making device having a film transport mechanism with a film feed that unwinds and transports a roll of film, a forming means that folds the film, and a sealing means that seals the end of the film that has been folded by the forming means, wherein the film transport mechanism has a roller that is configured to be able to blow air from its outer circumferential surface, and the bag making device is configured so that the roller can transport the film by the film feed without coming into contact with the film while blowing air from its outer circumferential surface; and a bag making and packaging machine equipped with a bag making device, characterized in that it also has a packaging unit that is located downstream of the bag making device and fills and seals packaging bags made by the bag making device with packaged items.

Images