JP2017206292A - Opening device of pouch - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an opening device of a pouch, which removes close adhesion of an opening of the pouch formed by welding and cutting front-side and back-side films.SOLUTION: An opening device (9) of a pouch, which removes close adhesion of an opening (101a) of the pouch (101) formed by welding and cutting front-side and back-side films, includes a carrier part (20) for carrying the pouch (101), and a bent part (30) that is opened by bending the opening (101a) of the pouch (101) on the downstream side of the carrier part (20).SELECTED DRAWING: Figure 2

Description

  The present invention relates to an opening device for a pouch that removes adhesion of an opening of a pouch formed by welding and cutting a front film and a back film.

  Pouches are widely used as containers for soups, liquid seasonings and the like. The pouch is formed into a bag by thermally welding and cutting the front side film and the back side film. For example, the pouch shown in FIGS. 5A and 5B is known.

  In FIG. 5A, the pouch 100, although not shown in the figure, conveys the front side long film and the back side long film, which are respectively unwound from the roll of raw material wound in a roll shape, and the bottom seal bar. And a predetermined seal | sticker site | part is heat-welded with a side seal bar, and it manufactures with the bag making apparatus which performs the cutting | disconnection by a leather cutter and a shear cutter (refer patent document 1). Further, the opening portion 100a and the bottom seal portion 100b are formed in the film conveyance direction by the leather cutter, and the side seal portions 100c1 and 100c2 are formed in the direction orthogonal to the film conveyance direction by the shear cutter.

  On the other hand, the pouch 101 of FIG. 5B similarly conveys the front side long film and the back side long film, which are respectively unwound from the raw roll in which the film is wound in a roll shape, and conveys the bottom seal bar. And a predetermined sealing part is heat-welded with a side seal bar, and it manufactures with the bag making apparatus which performs the cutting | disconnection by a leather cutter and a shear cutter. Although not shown, side seal portions 101c1 and 101c2 are formed in the film transport direction by a leather cutter, and an opening 101a and a bottom seal portion 101b are formed in a direction orthogonal to the film transport direction.

  In order to easily tear the pouch from the notches 100d and 101d, for example, a straight-cutting nylon film may be used as such a pouch 100 or 101 film. When using this film, it is necessary to align the opening direction of the pouch with the direction of film transport during bag making. There is.

  The pouch 100 shown in FIG. 5A is a pouch that is filled and sealed with the opening 100a on the short side, and is torn and opened along the short side direction from the notch 100d on the long side. In the film transport direction, the side seal portions 100c1 and 100c2 are arranged in the vertical direction facing the direction orthogonal to the transport direction.

  On the other hand, the pouch 101 shown in FIG. 5B is a pouch that is filled and sealed with the opening 101a on the short side, and is torn along the long side direction from the notch 101d on the short side to enlarge the opening and open. In manufacturing such a pouch 101, as shown in FIG. 5B, the opening 101a is arranged in the direction perpendicular to the film conveyance direction, and the side seal parts 101c1 and 101c2 are arranged in the horizontal direction.

JP 2012-224030 A

  When manufacturing the above-described pouches 100 and 101, generally, the cutting process in the film transport direction is a fixed blade such as a leather blade, and the cutting in the direction perpendicular to the film transport direction is performed with a push cutting blade such as a shear cutter that moves up and down. Each done. In the cutting process of the pouch 100, the opening 100a and the bottom seal portion 100b are cut with a fixed blade, and the side seal portions 100c1 and 100c2 are cut with a push blade. For this reason, as for the opening part 100a of the pouch 100, the films of the cut end surface do not adhere.

  On the other hand, in the cutting process of the pouch 101, the side seal portions 101c1 and 101c2 are cut by a fixed blade such as a leather blade, and the opening 101a and the bottom seal portion 101b are cut by a push cutting blade such as a push shear cutter. For this reason, the films on the cut end face of the opening 101a of the pouch 101 are in close contact with each other, and the opening property is lowered when the opening 101a of the pouch 101 is opened when the contents are filled. In particular, when the film used for the pouch 101 becomes thick, the films in the opening 101a are in close contact with each other, the opening property of the opening 101a is lowered, and an opening defect occurs. For this reason, it is necessary to remove the close contact of the opening 101a of the pouch 101 generated by a push cutting blade such as a push shear cutter manually or by using other means, resulting in a great deal of labor and cost. It was.

  Accordingly, an object of the present invention is to provide a pouch opening device that removes the adhesion of the opening portion of the pouch formed by welding and cutting the front film and the back film.

  In order to solve the above-mentioned problems, a pouch opening device according to the present invention is a pouch opening device that removes adhesion of a pouch opening formed by welding and cutting a front film and a back film. It is the structure which has the conveyance part to convey, and the bending bending part which bends and bends the opening part of the said pouch in the downstream of the said conveyance part.

  According to the opening device of the pouch of the present invention, the pouch formed by welding and cutting the front side film and the back side film is conveyed, and the opening portion of the pouch is bent and bent at the bending bending portion. It is possible to remove the adhesion of the opening by causing the back film to be displaced and opening. Thereby, at the time of filling the contents in the pouch, it is possible to prevent a decrease in the opening property of the opening and the occurrence of an opening defect. In addition, it is possible to eliminate a great amount of labor and cost for preventing a decrease in the opening property of the opening portion of the pouch and the occurrence of a defective opening.

It is a schematic perspective view which shows a part of bag making apparatus provided with the opening apparatus of the pouch which concerns on embodiment of this invention. It is a reference perspective view of a pouch opening device according to an embodiment of the present invention. It is a reference top view of the opening device of the pouch which concerns on embodiment of this invention. It is explanatory drawing which shows the bending bending state of the opening part of the pouch by the upper conveyance roller and the lower conveyance roller in the opening apparatus of the pouch which concerns on embodiment of this invention. It is a front view of the pouch which opens from the notch of a long side, and tears along a short side direction. It is a front view of the pouch which opens from the notch of a short side, and tears along a long side direction.

  Embodiments of the present invention will be described with reference to the drawings.

  As shown in FIG. 1, a pouch opening device 9 according to the present embodiment is a bag making apparatus 1 that manufactures a pouch 101 (see FIG. 5B) by thermally welding and cutting a front-side long film 11 and a back-side long film 12. 1 is used as a device for removing the close contact of the opening 101a of the pouch 101.

  The bag making apparatus 1 includes a raw roll (not shown) for supplying a front long film 11 (corresponding to the front film 101e of the pouch 101) and a back long film 12 (corresponding to the back film 101f of the pouch 101), respectively. A pair of upper and lower nipping / conveying rollers 2 that convey the front-side long film 11 and the back-side long film 12 supplied from the original roll, and the front-side long film that is conveyed by being nipped and conveyed by the nipping / conveying roller 2. 11 and the back side long film 12 have four pairs of side seal bars 3 and two pairs of bottom seal bars 4 for forming a long film welded body 13 by heat welding. Furthermore, the bag making apparatus 1 includes a transport roller 5 that supports and transports the long film welded body 13 formed by heat welding, and a leather cutter that cuts the long film welded body 13 in the transport direction to form a belt-like body 14. 6, a nipping and conveying roller (pinch roller) 7 for nipping and conveying the belt-like body 14, and a shear cutter 8 (three pouches 101 for each pouch 101) that cuts the belt-like body 14 in a direction perpendicular to the carrying direction. Manufacturing), a pouch opening device 9 that conveys the pouch 101 and removes the close contact of the opening 101a of the pouch 101 formed by cutting the shear cutter 8, and an unloading unit 10 that unloads each pouch 101. . The shear cutter 8 described above is cut so as to be conveyed to the opening device 9 of the pouch with the bottom seal portion 100b of the pouch 101 in front and the opening portion 100a in the back. By conveying the pouch 101 to the pouch opening device 9 in this way, air does not flow into the pouch 101, and the wrinkle when the opening 100 a is bent and bent by the opening device 9, and when the pouch 101 is packed. I will be prevented.

  The above-described opening device 9 for the pouch is opened by causing individual pouches 101 formed by cutting with the shear cutter 8 to bend and bend while being conveyed into the device, thereby causing the front film 101e and the back film 101f of the pouch 101 to be displaced. Then, the close contact of the opening 101a of the pouch generated by cutting the shear cutter 8 is removed.

  The pouch opening device 9 will be described with reference to FIGS. FIG. 2 is a reference perspective view of the pouch opening device 9 as viewed from the shear cutter 8 side. The pouch opening device 9 is configured to open the individual pouch 101 formed by cutting with the shear cutter 8 by placing and conveying the pouch 101 and the pouch 101 conveyed by the conveyance unit 20 by nipping and conveying the upper and lower rollers. In the opening width direction of the portion 101a (the direction from one end to the other end of the opening 101a), the bending portion 30 bends in the vertical direction.

  The conveyance unit 20 extends in a direction orthogonal to the conveyance direction (arrow direction 10A) of the pouch 101, and is mounted on the upstream shaft 21 and the downstream shaft 22 that are arranged in parallel to the shafts 21 and 22 at equal intervals. The two endless belts that transport the pouch 101 to the downstream bending portion 30 between the plurality of transport rollers 23, 24, the transport roller 23 of the upstream shaft 21, and the transport roller 24 of the downstream shaft 22. The conveyor belt 25 is mounted, and has a drive unit (not shown) that drives the shafts 21 and 22 to rotate.

  The transport rollers 23 and 24 are appropriately mounted at predetermined positions of the upstream shaft 21 and the downstream shaft 22, but can be moved to other positions. Thereby, the conveyance rollers 23 and 24 can be moved to a predetermined position suitable for conveyance according to the size of the pouch.

  The bending and bending portion 30 on the downstream side of the conveying portion 20 extends in a direction orthogonal to the conveying direction of the pouch 101, and is arranged in an up-and-down parallel manner with an upper shaft 31, a lower shaft 32, and an upper conveying roller mounted on the upper shaft 31. 33, a lower conveyance roller 34 mounted on the lower shaft 32, and a drive unit (not shown) that drives the shafts 31 and 32 to rotate in conjunction with each other.

  In the bending / bending portion 30, as shown in FIG. 4, the upper conveyance roller 33 attached to the upper shaft 31 and the lower conveyance roller 34 attached to the lower shaft 32 press the opening 101 a of the pouch 101. It is bent and bent in the vertical direction and conveyed. In addition, an elastic ring (annular pressing portion) 35 such as silicon rubber is attached to the center of the outer peripheral surface of the upper conveying roller 33, and an elastic ring (annular pressing) such as silicon rubber is provided at both ends of the outer peripheral surface of the lower conveying roller 34. Part) 35 is mounted. Further, when the upper transport roller 33 and the lower transport roller 34 are mounted on the shafts 31 and 32, the elastic ring 35 of the lower transport roller 34 is positioned below the elastic ring 35 of the adjacent upper transport roller 33. It is attached to. In this way, by arranging a plurality of elastic rings 35 of the lower conveying roller 34 between the elastic rings 35 of the upper conveying roller 33, it supports to reduce the impact on the pouch 101, and the opening 101a. Can be bent and bent stably.

  The upper transport roller 33 and the lower transport roller 34 are appropriately mounted at predetermined positions on the upper shaft 31 and the lower shaft 32, but can be moved to other positions. As a result, the transport rollers 33 and 34 can be moved to a predetermined position suitable for nipping and transporting the pouch 101 by bending the opening 101a of the pouch 101 in the vertical direction.

  Further, in this embodiment, the upper conveyance roller 33 and the lower conveyance roller 34 are disc-shaped rollers using an elastic material (annular pressing portion) on the outer peripheral surface, and the opening 101a of the pouch 101 is pressed and nipped and conveyed. You may bend and bend.

  Further, in this embodiment, the opening 101a of the pouch 101 is bent in the vertical direction by pressing, and the nipping and conveying of the pouch 101 is performed by three upper conveying rollers 33 and two lower conveying rollers as shown in FIGS. Although it is performed for three bags as the pouch opening device 9 by the conveyance roller 34, the number of the upper conveyance rollers 33 and the lower conveyance rollers 33 is the same as that of the pouch 101. The size can be appropriately changed according to the size (length in the direction orthogonal to the transport direction).

  As described above, according to the opening device 9 of the pouch according to the present embodiment, the pouch 101 is conveyed, the opening 101a of the pouch 101 is pressed, bent, bent, and conveyed, so that the front side film 101e of the pouch 101 is The back side film 101f can be displaced and opened to remove the close contact of the opening 101a of the pouch. For this reason, at the time of filling the contents in the pouch, it is possible to prevent the opening property of the opening 101a from being lowered and the occurrence of defective opening, and also the opening property of the opening 101a of the pouch 101 to be lowered and poor opening. It is possible to eliminate a great amount of labor and cost such as unraveling by manual work for preventing the occurrence or removing it using other means.

  As described above, according to the present invention, the front side of the opening part of the pouch is bent by pressing and bending the opening part of the pouch that is formed by conveying the pouch, welding and cutting the front side film and the back side film. Since the film and the back film are opened by causing a shift, and the close contact of the opening can be removed, it is useful as a pouch opening device for removing the close contact of the open portion of the pouch.

DESCRIPTION OF SYMBOLS 1 Bag making apparatus 6 Leather cutter 8 Shear cutter 9 Pouch opening apparatus 11 Front side long film 12 Back side long film 20 Conveying part 21, 22 Shaft 23, 24 Conveying roller 25 Conveying belt 30 Deflection part 31 Upper shaft 32 Lower shaft 33 Upper conveying roller 34 Lower conveying roller 35 Elastic ring (annular pressing portion)
101 pouch 101a opening 101d notch 101e front side film 101f back side film

Claims (4)

A pouch opening device that removes adhesion of the opening portion of the pouch formed by welding and cutting the front side film and the back side film,
A transport unit for transporting the pouch;
On the downstream side of the transport unit, a bent bending part that opens by bending the opening of the pouch, and
A pouch opening device having: The bent bending portion includes an upper transport roller and a lower transport roller,
The pouch opening device according to claim 1, wherein the pouch is bent and bent by an annular pressing portion of the upper conveying roller and an annular pressing portion of the lower conveying roller.   3. The pouch opening device according to claim 2, wherein the annular pressing portion is an elastic ring attached to outer peripheral surfaces of the upper transport roller and the lower transport roller.   The upper conveying roller is mounted on the upper shaft, the lower conveying roller is mounted on the lower shaft, and has an annular pressing portion at the center of the outer peripheral surface of the upper conveying roller, and an annular pressing portion at both ends of the outer peripheral surface of the lower conveying roller. The opening device for a pouch according to claim 2 or 3, wherein the annular pressing portion of the lower conveying roller is positioned below the annular pressing portion of the upper conveying roller.

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