JP2017081098A - Apparatus and method for manufacturing packaging bag - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent poor seal and poor appearance of a back-lining part due to a clearance between a vertical seal device and a film plane.SOLUTION: A device for manufacturing a packaging bag has a vertical seal device 120 which forms a back-lining part 3 which extends along a vertical direction and in which a pair of side edges of a film constituting a bag, which laterally face each other, are bonded in a principal rafter shape. The vertical seal device 120 comprises: a seal head part 121 which forms a vertical seal part 31 on an outer edge side of the back-lining part 3; and a guide head part 122 which is located on an inner edge side of the back-lining part 3 with respect to the seal head part 121 and which guides a non-seal part 32 formed on the inner edge side of the back-lining part 3.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an apparatus and a method for manufacturing a packaging bag, and more particularly to an apparatus and a process for forming a back pasting portion of a bag.

  In general, a packaging bag including a back pasting portion extending in the vertical direction and horizontal seal portions formed at both ends in the vertical direction is known. For example, in the pillow package described in Patent Document 1 below, the non-seal part 4 is provided on the inner edge side of the back seal part 1, the seal part 5 is formed on the outer edge side, and the lateral seal part 2 is formed on the side seal part 2. By forming a notch 7 at the end edge of a certain back seal portion 1, a structure is provided in which the back seal portion 1 is opened by tearing vertically from the notch 7.

  Further, in the packaging bag described in Patent Document 2 below, an opening / closing means 6 such as a zipper is attached to the inside of the open end forming portion 4 as a center seal portion, and the outer edge side of the opening / closing means 6 is sealed. By forming the stopper 9 and forming the notch 4a at the edge of the opening end forming portion 4, opening the opening end forming portion 4 from the notch 4a forms an opening that can be opened and closed by the opening / closing means 6. It is configured to be.

Japanese Utility Model Publication No. 63-123479 JP-A-11-124150

  By the way, in the said conventional packaging bag 1, as shown in FIG. 7, while forming the vertical seal part 31 in the outer edge side in the back sticking part 3, the non-seal part 32 is formed in the inner edge side. Thus, in order to form the non-seal part 32, in the bag making machine and pillow packaging machine which have the normal vertical seal apparatus for forming the back sticking part 3, the lower end part of the said vertical seal apparatus is made non-seal It is necessary to set the part 32 apart from the bag body 2 by the width of the part 32 (the distance between the inner edge 30b of the back pasting part 3 and the boundary line 30c of the vertical seal part 31 and the non-seal part 32). However, in order to provide a gap between the bag body 2 and the lower end of the vertical seal device, it is necessary to finely adjust the vertical seal device each time the width of the back pasting portion 3 or the width of the non-seal portion 32 changes. Therefore, the setting work becomes complicated, and if the above-mentioned interval is generated, it is difficult to guide the bag body smoothly in the flow direction, and wrinkles are generated in the back pasting portion 3 and its periphery, or a seal failure is generated. There is a problem.

  Further, when forming the lateral seal portions 4 and 5, as shown in FIG. 8, when the portion having the non-seal portion 32 is sealed by the lateral seal device, the non-seal portion 32 remains open, for example, When the lateral seal portion 4 is formed at the end edge of the bag body as shown in the figure, the end seal opening 32op remains between the end edges 32ed of the non-seal portion 32, and sealing is performed. For this reason, the opening edges 2a and 2b on the back pasting part 3 side and the opening edge 2c on the opposite side are not aligned, and the opening edges 2a and 2b on both sides of the end edge 32ed of the non-sealing part 32 4y is generated, or a positional deviation ΔL is generated between the opening edges 2a and 2b and the opening edge 2c, which causes a problem in that the sealing failure occurs in the lateral seal portion 4 or the appearance deteriorates. There is.

  Therefore, the present invention solves the above-mentioned problems, and its object is to prevent a sealing failure and an appearance failure of the back-pasted portion due to the distance between the vertical sealing device and the film surface. It is another object of the present invention to prevent poor sealing and poor appearance that occur in the lateral sealing portion due to the presence of the non-sealing portion.

  In view of such a situation, the packaging bag manufacturing apparatus (100, 200, 300) according to the present invention has a pair of side edges (2s1, 2s2) facing the lateral direction of the film (2) constituting the bag (1). ) Have a vertical sealing device (120, 220, 320) that forms a back pasting portion (3) that is attached in the shape of a palm and extends along the vertical direction, and the vertical sealing device (120, 220, 320). ) For the seal head part (121, 221 and 321) which forms the vertical seal part (31) on the outer edge side of the back pasting part (3), and the seal head part (121, 221 and 321). A guide head portion (122, 222, 322) disposed on the inner edge side of the back pasting portion (3) and guiding a non-seal portion (32) formed on the inner edge side of the back pasting portion (3). It is characterized by that.

  In the present invention, it is preferable that the guide head part (122, 222, 322) has a pair of guide surfaces (122s) that contact or approach the non-seal part (32) from both lateral sides. However, in the present invention, the guide surface (122s) of the guide head part (122, 222, 322) is configured to abut or approach the non-seal part (32) only from one side in the lateral direction. It may be. In addition, at least one of the seal head part (121, 221, 321) and the guide head part (122, 222, 322) can be moved toward and away from the back pasting part (3) independently of the other. Preferably, it is configured.

  In the present invention, the seal head portion (121, 221 and 321) is a heating head that heats the film (2) to form the vertical seal portion (31) in the back pasting portion (3). preferable. In this case, at least one of the seal head portions (121, 221 and 321) is a heating surface, and has a pair of pressing surfaces (121s) for pressing the back pasting portion (3) from both lateral sides. It is desirable.

  In the present invention, the guide head portion (122, 222, 322) is the same as the seal head portion (121, 221, 321) when the seal head portion (121, 221, 321) is the heating head. It is preferable that they are separated. In this case, there is a gap (123) between the seal head portion (121, 221, 321) and the guide head portion (122, 222, 322), or a heat insulating layer having a higher heat insulating property than both head portions. It is desirable to interpose (124). Further, it is preferable that a means (122a) for cooling the guide head portion (122, 222, 322) is provided. Furthermore, it is preferable that the guide head part (122, 222, 322) is made of a material having a lower thermal conductivity than the seal head part (121, 221, 321).

  In the present invention, it has transfer means (110) for moving the film (2) relative to the vertical direction (relative to the vertical seal device and the horizontal seal device), and the vertical seal device (120, 220). , 320), it is preferable to have a lateral seal device (130) for sealing the film (2) along the lateral direction on the downstream side along the longitudinal direction.

  In this case, the non-seal portion (32) of the back pasting portion (3) is disposed along the vertical direction between the vertical seal device (120, 220, 320) and the horizontal seal device (130). Desirably, a guiding means (140) for guiding is provided. The guide means (140) preferably has a pair of guide members (141, 142) that are in contact with or close to the back pasting portion (3) from both sides in the lateral direction. In this case, it is preferable that the guide means (140) is provided integrally with the guide head portion (122, 222, 322). Further, it is desirable that the guiding means (140) guides the non-seal portion (32) so that the back pasting portion (3) is gradually inclined in the lateral direction along the longitudinal direction. In particular, it is more desirable to guide the back pasting portion (3) so as to lie down on the surface of the film (2) before the lateral sealing position of the lateral sealing device (130).

  In the present invention, at least a part of the non-sealing portion (32) of the back pasting portion (3) is placed between the vertical sealing device (120, 220, 320) and the horizontal sealing device (130). It is preferable to provide a shape-retaining seal device (150) that seals at a lateral seal region of the seal device (130) or at a position adjacent thereto. In particular, it is desirable that the shape-retaining seal device (150) seals the inside of the lateral seal region of the lateral seal device (130).

  In the above case, the lateral sealing device (130 ′) seals the edge portions (33, 34) of the non-sealing portion (32) of the back pasting portion (3) from both sides in the lateral direction. Between the pair of seal head portions (131A, 131B) and the other seal head portion (131C) that laterally seals the film (2) along the lateral direction between the pair of seal head portions (131A, 131B). ).

  Next, in the method for manufacturing a packaging bag according to the present invention, a pair of side edges (2s1, 2s2) opposed to each other in the lateral direction of the film (2) constituting the bag (1) are attached in the shape of a palm. And a vertical sealing step in which a back pasting portion (3) extending along the vertical direction is formed. In the vertical sealing step, a portion on the outer edge side of the back pasting portion (3) is sealed and the vertical sealing portion ( In parallel with the formation of 31), a portion on the inner edge side of the back pasting portion (3) becomes a non-seal portion (32) in a state of being guided in the longitudinal direction.

  In the present invention, in the vertical sealing step, the non-seal portion (32) is guided by a pair of guide surfaces (122s) that are in contact with or close to the non-seal portion (32) from both lateral sides. Is preferred.

  In the present invention, in the vertical sealing step, the vertical sealing portion (31) is preferably formed by heat sealing. In this case, it is preferable that the non-seal portion (32) is guided by a guide surface (122s) which is insulated or cooled by means for heat insulation or a heat insulation layer (124) or means for cooling (122a).

  In this invention, it is preferable to have the horizontal sealing process of sealing the said film (2) along the said horizontal direction after the said vertical sealing process. In this case, it is desirable that the non-seal part (32) of the back pasting part (3) is guided along the vertical direction between the vertical sealing process and the horizontal sealing process.

  Further, between the vertical sealing step and the horizontal sealing step, the non-seal portion (32) is guided so that the back pasting portion (3) is gradually inclined to one side along the vertical direction. Is preferred. In particular, it is desirable that the back pasting portion (3) is laid down on the surface of the film (2) before the start of the lateral sealing step.

  In the present invention, between the vertical sealing step and the horizontal sealing step, at least a part of the non-seal portion (32) of the back pasting portion (3) is a horizontal sealing region of the horizontal sealing step or its adjacent position. It is desirable to have a shape-retaining seal process that is sealed with In this shape-retaining sealing step, it is desirable to seal inside the horizontal sealing region of the horizontal sealing step.

  In the above case, in the lateral sealing step, the edge portions (33, 34) of the non-sealed portion (32) of the back pasting portion (3) are clamped from both sides in the lateral direction from both sides in the lateral direction. It is desirable that the film (2) is laterally sealed in the region along the lateral direction.

  In the present invention, a boundary line between the vertical seal portion (31) and the non-seal portion (32) of the back pasting portion (3) is formed on the one end portion (33, 34) of the back pasting portion (3). It is preferable to further include an opening portion forming step in which an opening start structure (33a, 33b) extending toward (30c) is formed. This unsealed portion forming step needs to be after the vertical sealing step. In this case, it is preferable that the opening portion forming step is performed before the lateral sealing step. In particular, it is effective that the opening portion forming step is performed simultaneously with the shape-retaining sealing step or continuously before and after that.

  In the present invention, the shape-retaining sealing step includes a pair of seal heads (151) for narrowing the back adhesive portion (3) from both sides in the lateral direction, and the pair of seal heads (151) is used in the lateral direction. It is preferable to carry out in a pressurized state sandwiched from both sides. Further, as a sealing method at various places, although it depends on the material of the film (2), it may be based on adhesion using an adhesive, or may be based on heat sealing (thermocompression bonding). In the present specification, “seal” does not mean only heat seal, but also includes adhesion using an adhesive, and as a result, the films (2) are fixed in a stacked state, Or it shall say the state which adhered.

  According to the present invention, by providing the guide head (122) and the guide surface (122s) for guiding and supporting the non-seal portion (32), the back sticking portion caused by the distance between the vertical seal device (120) and the film surface is provided. (3) Seal failure and appearance failure can be prevented. Further, by providing the guide means (140) and the shape-retaining seal device (150), it is possible to prevent the sealing failure and the appearance failure caused in the lateral sealing portion (4, 5) due to the presence of the non-sealing portion (32). Can do.

It is explanatory drawing (a)-(c) which shows typically the mode of the vertical sealing process in 1st Embodiment (bag making machine, bag making method) of the manufacturing apparatus and manufacturing method of the packaging bag which concerns on this invention. It is the top view (a) and side view (b) of the bag making machine of 1st Embodiment. It is sectional drawing (a)-(c) which shows the structure of the vertical seal | sticker apparatus of 1st Embodiment typically. It is process sectional drawing (a)-(d) which shows the guidance process of the back sticking part by the guidance means of 2nd Embodiment. It is process sectional drawing (a)-(e) which shows the mode of the process by the shape retention seal process (shape retention seal apparatus) and a horizontal seal process (horizontal seal apparatus) of 3rd Embodiment. It is the longitudinal cross-sectional view (a) which shows the structural example of a horizontal pillow packaging machine, and the cross-sectional view (b) which shows the structural example of a vertical pillow packaging machine. It is a figure which shows the external appearance of the packaging bag manufactured by the manufacturing apparatus and manufacturing method which concern on this invention. It is explanatory explanatory drawing which shows the cause of the aspect which arises at the time of the horizontal seal | sticker of the packaging bag.

  Next, embodiments of the present invention will be described in detail with reference to the accompanying drawings. Initially, with reference to FIG. 7, the packaging bag 1 manufactured by embodiment which concerns on this invention is demonstrated. FIG. 7 is a perspective view of such a packaging bag 1.

  The film 2 constituting the packaging bag 1 is not particularly limited, but generally, one side (inner surface) obtained by laminating a sealant layer having a good sealing property on the inner surface of the base material layer selected according to the packaging application. A synthetic resin film having sealing properties is used. In the packaging bag 1, the back pasting portion 3 in which a pair of side edges 2 s 1 and 2 s 2 facing each other in the lateral direction (left-right direction in the figure) of the film 2 are bonded together by heat sealing or the like in a palm-like manner with the inner surfaces facing each other. Is formed in the center of the figure. On the outer edge side of the back pasting portion 3, a vertical seal portion 31 extending along the vertical direction (the vertical direction in the figure) is formed. An outer edge of the vertical seal portion 31 is an outer edge 30 a of the back pasting portion 3. A non-seal portion 32 extending along the vertical direction is formed on the inner edge side of the back pasting portion 3. The base part of the non-seal part 32 (boundary position with the main body part that stores the contents) serves as the inner edge 30 b of the back pasting part 3.

  Both the bag end portions 1A and 1B in the longitudinal direction of the packaging bag 1 are the horizontal seal portions 4 and 5 sealed by heat sealing or the like. These horizontal seal portions 4 and 5 are formed as follows, for example. First, one bag end 1 </ b> A serves as an opening that can be opened, and the other bag end 1 </ b> B serves as a lateral seal portion 5 to be sealed beforehand. Thereafter, the contents (not shown) are accommodated inside the bag, and then the other bag end 1 </ b> B is used as the horizontal seal portion 4 to be sealed. Further, edge seal portions 33 and 34 are formed at the edge portions of the back pasting portion 3 disposed on the horizontal seal portions 4 and 5. The edge seal portions 33, 34 are respectively adjacent to the outer seal end portions adjacent to both sides of the vertical seal portion 31 in the vertical direction (the vertical direction in the figure) and the inner sides adjacent to both sides of the non-seal portion 32 in the vertical direction. It is comprised so that it may be in the state by which the seal | sticker edge part was integrally sealed. The edge seal portions 33 and 34 are continuous with both the horizontal seal portions 4 and 5 and the vertical seal portion 31, so that the inside of the non-seal portion 32 is located inside the bag and the outside of the bag. And sealed. The lengths of the edge seal portions 33 and 34 in the vertical direction are the same as the widths of the horizontal seal portions 4 and 5 in the vertical direction. This is because the edge seal portions 33 and 34 are formed simultaneously with the lateral seal portions 4 and 5 as described later, but the manufacturing method of the present invention is not limited to such a structure.

  In the back pasting portion 3, the boundary line 30c between the vertical seal portion 31 and the non-seal portion 32 is formed to extend linearly along the vertical direction. Further, opening start structures 33a and 34a are provided at the edge portions of the edge seal portions 33 and 34, respectively. This opening opening structure is a notch having a V-shaped tip shape in FIG. In the illustrated example, both the edge seal portions 33 and 34 are provided with an opening start structure. However, among the edge seal portions 33 and 34, at least one edge seal portion in the vertical direction is provided with an opening start structure. Just do it. Further, the opening start structure 33a provided in the edge seal portion 33 and the opening start structure 34a provided in the edge seal portion 34 may be different from each other, but basically adopt the same configuration. obtain.

  In the present embodiment, an unsealing start structure 33a is formed which includes a notch configured in a notch shape from the edge of one edge seal 33. The opening start structure 33a has a V-shaped tip shape, and the apex of the tip is an opening start end that is an inner end. A more specific position of the opening start end 33p is not in the outer seal end on the vertical side (the right side in the figure) of the vertical seal portion 31, but in the inner seal end on the vertical side of the non-seal portion 32. It is. However, the position of the opening start structure 33a and the opening start end thereof is not limited to the illustrated example, and may be in the vicinity of the boundary between the outer seal end portion and the inner seal end portion. As a result, the edge seal portion 33 is cut off. It is only necessary that the film 2 is torn later along the boundary line 30c and the two films 2 that overlap at the non-seal portion 32 are separated so that the film 2 can be opened.

  However, the opening start structure of the present invention may be a notch having another shape, or may be a linear cut, or may be a non-linear refractive cut. Further, the present invention is not limited to the above notches and notches (slits), and may be various types of tear lines including perforations, half-cut lines, rows of minute holes, and the like. If the direction and the position of the opening start end thereof can be conceived and, as a result, it has an easy opening action in the vertical direction, it can be used as the opening start structure.

  As shown in FIG. 7, the packaging bag 1 according to the present invention is not a sealed bag that already contains items, and one of the lateral seal portions 4 and 5 is not sealed, and FIG. It may be opened as shown. For example, the bag making machine 100 shown in FIGS. 1 and 2 is an apparatus for manufacturing a packaging bag 1 ′ (see FIG. 2) having such an opening 2op. Such a bag shown in FIG. 2 then becomes a packaging bag 1 shown in FIG. 7 by forming a transverse seal portion 4 after accommodating an object.

(First embodiment)
First, the structure of the bag making machine 100 corresponding to the manufacturing apparatus according to the first embodiment of the present invention shown in FIGS. 1 and 2 and the bag making process by the bag making machine 100 will be described. In this embodiment, as described above, a packaging bag 1 ′ having an opening 2op at one end before the object is stored in the packaging bag 1 shown in FIG. 7 is manufactured. The bag making machine 100 is provided with a well-known transfer means 110 (not shown) including a transport mechanism such as a belt conveyor and a mechanism for pulling the film 2 (tubular body 2t). The transfer means 110 transfers the film 2 to the bag making machine 100. The surface 111 is moved in the vertical direction (from the right side to the left side in FIG. 2). On the upstream side in the conveyance direction on the right side in the figure, the lateral side edges 2s1 and 2s2 of the flat film 2 are bent upward by a guide mechanism (not shown), and the side edges 2s1 and 2s2 are held by the guide mechanisms 112 and 113 at the top. Superimposed. Thereby, the film 2 is made into the cylindrical body 2t. The transfer means 110 has a transport roller shaft that is rotationally driven in a state of being pressed against the film 2 and a head portion that has a suction force for the film 2, and is vertically pressed while being pressed against the film 2 periodically. A box motion mechanism that intermittently drives in the direction can also be used.

  In the present embodiment, since only the packaging bag 1 ′ is manufactured, the cylindrical body 2t is folded in the vertical direction on the transport body 111 by the transfer means 110 and directed in the vertical direction (the left side in the drawing). To be moved. At this time, the overlapping portion 3 ′, which is overlapped in the above-mentioned palm shape and becomes the back pasting portion 3, is held by the holding mechanisms 112, 113 so as to stand up almost vertically.

  Next, the cylindrical body 2t passes through the vertical sealing device 120. The vertical seal device 120 includes a pair of seal head portions 121 provided facing each other so as to sandwich the overlapping portion 3 ′ from both sides in the horizontal direction (vertical direction in FIG. 2A), and the seal head. A pair of guide head portions 122 disposed on the inner edge side of the overlapping portion 3 'with respect to the portion 121 and provided to face each other so as to sandwich the base of the overlapping portion 3' from both sides in the lateral direction. Have. The vertical seal device 120 has a drive unit 126 that holds and drives the seal head unit 121 and the guide head unit 122, and the drive unit 126 includes the pair of seal head units 121 and the pair of guide head units 122. It is configured to be movable in a manner of approaching or moving away in the lateral direction. As a drive structure of the drive unit 126, for example, a ball screw mechanism or a feed screw mechanism having a screw shaft having a pair of screw parts rotating in the opposite directions and a pair of nuts screwed into the screw parts, respectively. be able to. The pair of seal head portions 121 and the pair of guide head portions 122 are attached to a pair of nuts that are respectively screwed into the pair of screw portions, so that when the screw shaft is rotated by a motor or the like, they move in opposite directions. To do. As a result, the pair of seal head portions 121 and the pair of guide head portions 122 can sandwich the overlapping portion 3 ′ from both sides, or can be separated from the overlapping portion 3 ′ to both sides.

  It should be noted that the pair of seal heads 121 and the pair of guide heads 122 may be configured to perform the same operation by a common drive system so that different operations can be performed by different drive systems. It may be configured. If it is the latter, the sealing function of the seal head part 121 and the guide function of the guide head part 122 (function to hold the overlapping part 3 ′ in the raised state) can be optimized separately. That is, it is preferable that at least one of the seal head portion 121 and the guide head portion 122 is configured to be able to approach and separate from the overlapping portion 3 ′ and the back pasting portion 3 independently of the other. In particular, it is of course desirable that both the seal head portion 121 and the guide head portion 122 are configured to be able to approach and separate from the overlapping portion 3 ′ independently of the other.

  In this embodiment, as shown in FIG. 1A, when the overlapping portion 3 ′ held in the shape of a palm by the guide mechanisms 112 and 113 is introduced into the vertical seal device 120, it is shown in FIG. As described above, the outer edge side portion of the overlapped portion 3 ′ is heat-sealed by being heated and pressed by the heating surfaces 121 s of the pair of seal head portions 121. Further, at this time, the inner edge side portion of the overlapped portion 3 ′ is held between the guide surfaces 122 s of the pair of guide head portions 122 and is maintained in a palm-like shape (vertical sealing step). At this time, the holding surface 122t, which is the lower surface of the guide head portion 122 shown in the figure and is the bottom surface facing the bag body (the portion excluding the portion 3 ′ or the back pasting portion 3 of the cylindrical body 2t), It is in sliding contact with the surface of the film 2 of the bag body. However, as shown by the dotted line in FIG. 1B, the guide function of the inner edge side of the non-seal portion 32 of the guide surface 122s ′ is secured and the sliding resistance between the bottom surface of the guide head portion 122 and the film 2 is reduced. For this purpose, the bottom corner 122t 'on the guide surface 122s' side of the guide head 122' protrudes downward, and the bottom of the guide head 122 'other than the bottom corner 122t' is in contact with the surface of the film 2. It is preferable to be configured so as to have an interval between them. This further improves the function of guiding the cylindrical body 2t in the vertical direction. As described above, as shown in FIG. 1C, the outer edge side portion of the overlapping portion 3 ′ is heat sealed to form the vertical seal portion 31, and the overlapped portion guided by the guide head portion 122. A portion on the inner edge side of the mating portion 3 ′ is not heated and becomes a non-seal portion 32.

  Here, when the transfer means 110 performs intermittent driving, when the transfer means 110 stops, the pair of seal head portions 121 sandwich the outer edge side portion of the overlapped portion 3 'and heat and press the heat. Seal. At this time, the pair of guide head portions 122 also sandwich the portion on the inner edge side of the overlapped portion 3 'in the same manner as described above, and maintain the holding state of the overlapping shape of the overlapped portion 3'.

  On the other hand, when the transfer means 110 is continuously driven, the vertical seal device 120 itself is driven by a box motion mechanism, or the pair of seal head portions 121 and the pair of guide head portions 122 are respectively rotated in the vertical direction. It can be configured in a possible disk shape, and can be configured to heat seal while rotating or to guide while rotating as the overlapped portion 3 ′ moves in the vertical direction. Further, the pair of seal head portions 121 heat-seal with the portion 3 ′ sandwiched between them so that the overlap portion 3 ′ can slide between the pair of seal head portions 121. The pair of guide head portions 122 may be guided in a state in which the overlapping portion 3 ′ is clamped to such an extent that the portion 3 ′ can slide between the pair of guide head portions 122. In this case, as indicated by a dotted line in FIG. 2, in the vertical sealing device 120, a pair of pressure-bonding rollers 129 having a knurled outer peripheral surface is provided on the downstream side of the seal head 121, and the seal head 121. It is preferable to complete the heat seal by pressurizing the outer edge side portion of the overlapped portion 3 'heated in step (1).

  FIG. 3 is an enlarged cross-sectional explanatory view showing the positional relationship between the seal head part 121 and the guide head part 122 in the vertical seal device 120 of the present embodiment. FIG. 3A shows an example in which a gap 123 is provided between the seal head part 121 and the guide head part 122 arranged below the seal head part 121. In this example, the seal head part 121 and the guide head part 122 are not in direct contact with each other via the drive part 126, but a gap 123 is provided therebetween. As a result, the heat generated in the seal head part 121 is not directly transmitted to the guide head part 122, and therefore when the outer edge side of the overlapped portion 3 'is heat sealed by being narrowed by the pair of seal head parts 121. The inner edge side of the overlapping portion 3 ′ guided by the pair of guide head portions 122 can be prevented from being sealed by receiving heat. In the example in which the gap 123 is provided between the seal head part 121 and the guide head part 122 as shown in FIG. 3A, the seal head part 121 and the guide head part 122 can be driven separately. A mode in which the contact state of the seal head portion 121 with respect to the outer edge side portion of the overlapping portion 3 ′ and the contact state or proximity state of the guide head portion 122 with respect to the inner edge side portion of the overlapping portion 3 ′ are different from each other. It is also possible to make contact or approach at different timings. For example, the guide head portion 122 may be fixed at a fixed position close to the inner edge portion of the overlapping portion 3 ′ without moving the guide head portion 122 in the lateral direction. When viewed from the functional aspect, the guide surface 122s of the guide head portion 122 may be disposed only on one side in the lateral direction of the non-seal portion 32 and may be configured to guide only from one side.

  In the example shown in FIG. 3B, the seal head part 121 and the guide head part 122 are arranged on both sides with a heat insulating layer 124 having a higher heat insulating property than any of these. In this case, the seal head portion 121 and the guide head portion 122 may be fixed to each other with the heat insulating layer 124 interposed therebetween, or in a direction along the heat insulating layer 124 with the heat insulating layer 124 interposed therebetween. It may be configured to be movable. In this example, it is possible to prevent the non-sealed portion 32 from being heated by the heat insulating effect by the heat insulating layer 124 as described above. As shown in FIGS. 3A and 3B, in the process of transferring the cylindrical body 2t to the upstream end of the guide head portions 122 and 122 ′, It is preferable to form a tapered surface 122ti for smoothly guiding the surface to the bottom surface (holding surface 122t) of the guide head portions 122 and 122 'or the corner portion of the guide surface 122s'.

  In the example shown in FIG. 3C, a state in which the cooling means 122a is provided in the guide head portion 122 is shown. A heater 121 a such as an electric heater is built in the seal head part 121, and heat sealing is performed via a heating surface 122 s that abuts on the overlapping portion 3 ′ of the seal head part 121. On the other hand, since the guide head part 122 is adjacent to the seal head part 121, the guide head part 122 receives radiant heat from the seal head part 121. In this example, however, the guide head part 122 includes a cooling structure 122a having a passage through which a cooling medium flows. The amount of heating applied to the inner edge side portion of the overlapped portion 3 'can be reduced through the guide surface 122s in contact with or close to the overlapped portion 3' of the guide head portion 122. Therefore, the sealing property of the vertical seal portion 31 can be ensured by sufficient heating, and the non-seal portion 32 can be reliably formed. In addition, the cooling means 122a of this guide head part 122 is applicable also to the example which provided the heat insulation layer 124 shown in FIG.3 (b).

  As described above, not only heat sealing but also the case where the vertical seal portion 31 is formed by various sealing methods, the seal head portion 121 is an optimum seal for the seal for forming the vertical seal portion 31. The portion on the outer edge side of the overlapped portion 3 ′ is sealed in a state (for example, an optimal pressurization state or pressurization time), and the guide head portion 122 maintains the shape retaining state of the non-seal portion 32, thereby It is possible to support and guide the portion on the inner edge side of the overlapped portion 3 ′ in an optimum guiding state (for example, optimum contact pressure or contact time) for forming the back pasting portion 3. In addition, when heat sealing is performed, the vertical seal portion 31 and the non-seal portion 32 can be reliably formed by providing the gap 123, the heat insulating layer 124, the cooling means 122a and the like as described above. Further, the effects obtained by providing the guide head portions 122 and 122 ′ are not only the above-described guide effect and shape retention effect of the non-seal portion 32, but also between the seal head portion 121 and the bag body film 2. The heat shielding effect due to the presence of the guide head portions 122 and 122 ′ can be mentioned. Therefore, it is preferable that the guide head portions 122 and 122 ′ are made of a material having lower thermal conductivity than the seal head portion 121. According to this, it becomes difficult to raise the temperature of the guide head portions 122 and 122 ′ themselves, and the above heat shielding effect can be enhanced.

  Returning again to FIG. As described above, when the back sticking portion 3 including the vertical seal portion 31 and the non-seal portion 32 is formed by the vertical seal device 120, the back sticking portion 3 uses the tilting member 127 and the like on the downstream side in the vertical direction. After the back pasting portion 3 is tilted to one side in the horizontal direction, the horizontal sealing is performed by the horizontal sealing device 130 (horizontal sealing step). In the illustrated example, the horizontal seal device 130 is provided with a pair of seal head portions 131, and the heating surface 132 of these seal head portions 131 clamps and presses a predetermined portion of the cylindrical state 2t at a predetermined timing. Heat seal. Further, a cutter 133 is attached to the seal head portion 131 to form the lateral seal portion 5 by heat sealing, and at the same time, an opening 2op of the preceding packaging bag 1 'and a part of the next packaging bag 1' The space seal part 5 is cut. Note that the cutter 133 may be provided separately from the seal head 131.

  In this embodiment, the guide head part 122 is disposed on the cylindrical body 2t side (inner side) with respect to the seal head part 121, but may be disposed adjacent to a part of the seal head part 121 inside. Therefore, it does not have to be adjacent to the other part of the seal head part 121. Moreover, the guide head part 122 may be extended and formed so as to stick to the seal head part 121 on the upstream side or the downstream side in the vertical direction.

(Second Embodiment)
Next, a description will be given of a second embodiment in which the bag making machine 100 of the first embodiment is provided with guide means 140 for the back pasting portion 3. In the first embodiment, the back pasting portion 3 is tilted to one side in the horizontal direction by the tilting member 127. In the present embodiment, the back pasting portion 3 is formed so as to extend along the vertical direction. Guide means 140 for guiding the above is provided. FIG. 4 is a cross-sectional view (a) to (d) that sequentially shows the cross-sectional shape along the horizontal direction of the guide means 140 toward the downstream side in the vertical direction.

  In this embodiment, the guide means 140 includes a pair of guide members 141 and 142 that sandwich the back pasting portion 3 from both lateral sides. In the example of illustration, the example which guides the back sticking part 3 so that it may fall to the right side of the figure is shown. The guide member 141 disposed on the left side of the drawing has a guide surface 141s that comes into contact with or close to the non-seal portion 32 of the back pasting portion 3, and a holding surface 141t that comes into contact with or close to the surface of the film 2 of the bag body. . The guide surface 141s is inclined so as to gradually cover the right side of the figure in the horizontal direction as it goes downstream in the vertical direction, and pushes the non-seal part 32 of the back pasting part 3 to the right side of the figure. And finally, as shown in FIG.4 (d), it is preferable to stick out above the back pasting part 3, and to make the back pasting part 3 completely fall on the surface of the film 2. FIG.

  On the other hand, the guide member 142 is opposed to the guide member 141 and contacts or approaches the non-sealed portion 32 of the back pasting portion 3 from the opposite side, and on the surface of the film 2 of the bag body as described above. And a holding surface 142t that abuts or is close to. The guide surface 142s is inclined so as to be gradually retracted to the right side in the figure in the horizontal direction as it proceeds to the downstream side in the vertical direction, and is pushed out by the guide surface 141s, and the non-seal portion 32 of the inclined back pasting portion 3 is moved from the opposite side. To support. And finally, as shown in FIG.4 (d), it is preferable to retract | save completely from the back sticking part 3, and it is comprised so that the back sticking part 3 may be in a completely lying state.

  By providing the guide means 140 between the vertical sealing device 120 and the horizontal sealing device 130, the entire back sealing portion 3 including the non-sealing portion 32 is in a lying state in the horizontal sealing process by the horizontal sealing device 130. In an embodiment, a transverse seal can be applied. Therefore, as shown in FIG. 8, it is difficult for the edge opening 32op to occur in the non-seal portion 32, and it is possible to prevent poor sealing and poor appearance of the lateral seal portion. The guide members 141 and 142 of the guide means 140 are configured integrally with the guide head 122, such as the guide head portion 122 of the vertical seal device 120 is formed by extending it to the downstream side in the vertical direction. May be good.

(Third embodiment)
Next, a description will be given of a third embodiment in which a shape-retaining seal device 150 for forming a shape-retaining seal portion is formed in a predetermined portion of the non-seal portion 32 of the back pasting portion 3 in the bag making machine 100 of the first embodiment. To do. In this embodiment, a shape-retaining seal device 150 is provided between the vertical seal device 120 and the horizontal seal device 130 of the first embodiment. In the shape-retaining seal device 150, as shown in FIG. 5A, the pair of guide head portions 122 of the vertical seal device 120 holds the non-seal portion 32 of the back pasting portion 3 just formed from both sides in the lateral direction. (This may be a part where the seal head part 121 of the vertical seal device 120 is installed adjacent to the upper side, and the guide head part 122 may be provided downstream from the seal head part 121 in the vertical direction. A pair of seal head portions 151 are provided so as to be able to approach and separate at a shape-retaining seal position on the downstream side in the longitudinal direction.

  FIG. 5B is a cross-sectional view showing a state in which the seal head portion 151 sandwiches the non-seal portion 32 and performs heat sealing at the shape retaining seal position. Accordingly, at this shape-retaining seal position, at least a part of the non-seal portion 32 is sealed, and the part is configured such that the edge opening 32op shown in FIG. 8 does not occur (shape retention sealing step). The shape-retaining seal portions 33x and 34x to be sealed at the shape-retaining seal position are inside the region (region that becomes the horizontal seal portions 4 and 5) that is further horizontally sealed by the horizontal seal device 130 on the downstream side in the vertical direction. Alternatively, it is formed at a position adjacent to the region. Therefore, the shape-retaining seal device 150 operates at a predetermined timing so that the shape-retaining seal portions 33x and 34x are formed in the above-described region or at the above-described position. Note that the shape-retaining seal portions 33x and 34x may be formed not only in the non-sealed portion 32 or adjacent positions thereof as shown in the figure but also in a part of the region to be the horizontal seal portions 4 and 5. Good. Instead of the structure and method shown in FIG. 5B, another shape-retaining seal device 150 ′ (shape-retaining seal process) indicated by a dotted line in FIG. 2 may be used. This shape-retaining seal device 150 'forms shape-retaining seal portions 33x and 34x by heat-sealing the back pasting portion 3 tilted on the bag body in a spot shape at the tip of the seal head.

  In this embodiment, instead of the tilting member 127, as shown in FIG. 5C, the guide means 140 provided in the second embodiment is formed on the downstream side in the longitudinal direction of the shape retaining seal device 150. Also good. In any case, in the present embodiment, the lateral seal portion 5 is finally formed by the seal head 131 of the lateral seal device 130 as shown in FIG.

  As shown in FIG. 5 (e), in the horizontal sealing device 130 ′ (horizontal sealing step), the back sticking portion 3 is not placed in the horizontal position and the horizontal sealing is performed, but the back sticking portion is formed by the seal head portions 131A and 131B. 3 is clamped from both sides in the lateral direction to seal the portions that become the edge seal portions 33 and 34 of the non-seal portion 32, and the horizontal seal is formed between the seal head portions 131A and 131B and the other seal head portion 131C. It is also possible to form the horizontal seal portions 4 and 5 by performing the above. In this case, it is preferable to hold the back pasting portion 3 in an upright state by extending the guide head portion 122 to the front of the lateral seal device 130 ′. Further, the back-sealed portion 3 may be held upright by guiding the non-seal portion 32 by a guide means different from the guide head portion 122 until just before the lateral seal device 130 ′. This horizontal sealing device 130 'can also be used in the following embodiments.

(Fourth embodiment)
FIG. 6A is a vertical cross-sectional view schematically showing the vertical sealing device 220 of the horizontal pillow packaging machine 200. In the fourth embodiment, when the film 2 is formed into the cylindrical body 2t, the object OB is disposed inside the cylindrical body 2t. The structure of the vertical seal device 220 is basically the same as in the previous embodiments. Can be configured. In the illustrated example, a pair of seal head portions 221 are provided, and a pair of guide head portions 222 are disposed inside thereof. In the illustrated example, the guide head unit 222 includes a guide surface unit that includes a guide surface that guides the non-seal unit 32 and a support plate unit that supports the cylindrical body 2t and the object OB. You may comprise. In the horizontal pillow packaging machine 200, as in the previous embodiments, the same horizontal seal device, guide means, shape-retaining seal device, and the like can be provided along the vertical direction. In addition, although the example of illustration is a normal type (thing in which the back sticking part 3 is arrange | positioned below), it can be comprised similarly in the reverse type (what has the back sticking part 3 arrange | positioned upward) horizontal pillow packaging machine.

(Fifth embodiment)
FIG. 6B is a cross-sectional view schematically showing the vertical sealing device 320 of the vertical pillow packaging machine 300. In the fifth embodiment, the film 2 is formed into a cylindrical body 2t by the former and the cylinder 301, and the vertical sealing device 320 is cylindrical on the outer periphery of the cylinder 301 by the pair of seal head portions 321 and the pair of guide head portions 322. The back pasting part 3 of the body 2t is formed. In this vertical pillow packaging machine 300, as in the previous embodiments, the same horizontal sealing device, guiding means, shape retaining sealing device, and the like can be provided along the vertical direction.

  In addition, the packaging bag of this invention and its manufacturing method are not limited to the structure as described in the said embodiment, The various different aspect based on the meaning of this invention is included. For example, although heat sealing is used as the sealing method in the above-described embodiment, the present invention is not limited to such a mode, and an adhesive is used as long as a sealing state that achieves the purpose can be obtained as a result. Various methods such as a method may be used, and the vertical seal portion, the shape-retaining seal portion, and the horizontal seal portion may be sealed by different methods. Furthermore, in the said embodiment, although it presupposes what consists of a bag form which has the back sticking part 3 and the horizontal seal | sticker parts 4 and 5, in this invention, it is a bag which has the back sticking part 3 provided with the non-seal part 32. There is no limitation to the illustrated format (pillow packaging bag or a bag having the same structure as this). In addition, the packaging bag 1 containing the contents of the above embodiment is provided with the opening start structures 33a and 33b on the edge seal portions 33 and 34 of the back pasting portion 3 to open the back pasting portion 3 in the vertical direction. However, the present invention is not limited to the one having such an opening structure. For example, from the side edge adjacent to the lateral seal portion 4, the present invention opens in the direction intersecting with the back pasting portion 3. It doesn't matter.

DESCRIPTION OF SYMBOLS 1, 1 '... Packaging bag, 1A, 1B ... Bag edge part, 2 ... Film, 3 ... Back sticking part, 4, 5 ... Side seal part, 31
... Vertical seal part, 32 ... Non-seal part, 33, 34 ... Edge seal part, 33a, 33b ... Opening start structure, 100 ... Bag making machine, 110 ... Transfer means, 120 ... Vertical seal device, 121 ... Seal head part 121s ... heating surface, 122, 122 '... guide head portion, 122a ... cooling means, 122s ... guide surface, 122t ... holding surface, 123 ... gap, 124 ... heat insulating layer, 126 ... drive portion, 130 ... horizontal sealing device, 131 ... Seal head part, 132 ... Heating surface, 133 ... Cutter, 130 '... Horizontal seal device, 131A, 131B, 131C ... Seal head part, 140 ... Guide means, 141, 142 ... Guide member, 150, 150' ... Preservation Shape seal device, 151... Seal head

In view of such a situation, the packaging bag manufacturing apparatus (100, 200, 300) according to the present invention has a pair of side edges (2s1, 2s2) facing the lateral direction of the film (2) constituting the bag (1). ) Have a vertical sealing device (120, 220, 320) that forms a back pasting portion (3) that is attached in the shape of a palm and extends along the vertical direction, and the vertical sealing device (120, 220, 320). ) For the seal head part (121, 221 and 321) which forms the vertical seal part (31) on the outer edge side of the back pasting part (3), and the seal head part (121, 221 and 321). A guide head portion (122, 222, 322) arranged on the inner edge side of the back pasting portion (3) and guiding a non-seal portion (32) formed on the inner edge side of the back pasting portion (3), and the seal Head part (121, 221, 321) and the above-mentioned plan The head portion (122, 222, 322) is held and driven, and the seal head portion (121, 222, 321) and the guide head portion (122, 222, 322) are moved with respect to the back pasting portion (3). And a drive unit (126) configured to be movable in a manner of approaching and separating in the lateral direction .

In the present invention, it is preferable that the guide head part (122, 222, 322) has a pair of guide surfaces (122s) that contact or approach the non-seal part (32) from both lateral sides. However, in the present invention, the guide surface (122s) of the guide head part (122, 222, 322) is configured to abut or approach the non-seal part (32) only from one side in the lateral direction. It may be. In addition, at least one of the seal head part (121, 221, 321) and the guide head part (122, 222, 322) can be moved toward and away from the back pasting part (3) independently of the other. Preferably, it is configured. Further, the seal head portion (121, 221, 321) and the guide head portion (122, 222, 322) are configured to be able to approach and separate from the back pasting portion (3) independently of the other. It is desirable that

Claims (18)

A pair of side edges (2s1, 2s2) facing in the lateral direction of the film (2) constituting the bag (1) are pasted in the shape of a palm, and a back pasting part (3) extending along the longitudinal direction is formed. A vertical sealing device (120, 220, 320)
The vertical seal device (120, 220, 320) includes a seal head portion (121, 221, 321) that forms a vertical seal portion (31) on the outer edge side of the back pasting portion (3), and the seal head portion ( 121, 221 and 321) are arranged on the inner edge side of the back pasting portion (3) and guide head portions (32) for guiding a non-seal portion (32) formed on the inner edge side of the back pasting portion (3). 122, 222, 322),
An apparatus for manufacturing a packaging bag. The guide head part (122, 222, 322) has a pair of guide surfaces (122s) that come into contact with or close to the non-seal part (32) from both sides in the lateral direction.
The manufacturing apparatus of the packaging bag of Claim 1 characterized by the above-mentioned. The seal head portions (121, 221 and 321) are heating heads that heat the film (2) to form the vertical seal portion (31) in the back pasting portion (3).
The manufacturing apparatus of the packaging bag of Claim 1 or 2 characterized by the above-mentioned. At least one of the seal head part (121, 221, 321) and the guide head part (122, 222, 322) is configured to be able to approach and separate from the back pasting part (3) independently of the other. The
The manufacturing apparatus of the packaging bag as described in any one of Claims 1-3 characterized by the above-mentioned. Between the seal head part (121, 221, 321) and the guide head part (122, 222, 322), there is a gap (123) or a heat insulation layer (124) having higher heat insulation than both head parts. Intervening,
The manufacturing apparatus of the packaging bag as described in any one of Claims 1-4 characterized by the above-mentioned. The film (2) has transfer means (110) for relatively moving along the longitudinal direction, and the film is disposed downstream of the longitudinal seal device (120, 220, 320) along the longitudinal direction. A lateral seal device (130) for sealing (2) along the lateral direction;
The manufacturing apparatus of the packaging bag as described in any one of Claims 1-5 characterized by the above-mentioned. Guiding means for guiding the non-seal portion (32) of the back pasting portion (3) along the longitudinal direction between the longitudinal seal device (120, 220, 320) and the lateral seal device (130). (140) is provided,
The manufacturing apparatus of the packaging bag of Claim 6 characterized by the above-mentioned. The guiding means (140) guides the non-seal portion (32) so that the back pasting portion (3) is gradually inclined in the lateral direction along the longitudinal direction.
The manufacturing apparatus of the packaging bag of Claim 7 characterized by the above-mentioned.   The apparatus for manufacturing a packaging bag according to claim 7 or 8, wherein the guide means (140) is provided integrally with the guide head section (122, 222, 322). Between the vertical sealing device (120, 220, 320) and the horizontal sealing device (130), at least a part of the non-sealing portion (32) of the back pasting portion (3) is placed in the horizontal sealing device (130). ) Having a shape-retaining seal device (150) that seals at or next to the lateral seal region,
The manufacturing apparatus of the packaging bag as described in any one of Claims 6-9 characterized by the above-mentioned. The lateral seal device (130 ′) is a pair of seal heads that seals the end edge portions (33, 34) of the non-seal portion (32) of the back pasting portion (3) from both sides in the lateral direction. A portion (131A, 131B) and the other seal head portion (131C) that horizontally seals the film (2) along the lateral direction between the pair of seal head portions (131A, 131B).
The manufacturing apparatus of the packaging bag as described in any one of Claims 6-10 characterized by the above-mentioned. A pair of side edges (2s1, 2s2) opposite to each other in the lateral direction of the film (2) constituting the bag (1) are pasted in a palm shape, and a back pasting portion (3) extending along the longitudinal direction is formed. Having a vertical sealing process,
In the longitudinal sealing step, the portion on the inner edge side of the back pasting portion (3) is formed in parallel with the portion on the outer edge side of the back pasting portion (3) being sealed to form the vertical sealing portion (31). Is a non-seal part (32) in a state of being guided in the longitudinal direction. In the vertical sealing step, the non-seal portion (32) is guided by a pair of guide surfaces (122s) in contact with or close to the non-seal portion (32) from both sides in the lateral direction.
The manufacturing method of the packaging bag of Claim 12 characterized by the above-mentioned. In the vertical sealing step, the vertical sealing portion (31) is formed by heat sealing.
The method for producing a packaging bag according to claim 12 or 13, characterized in that After the vertical sealing step, it has a horizontal sealing step of sealing the film (2) along the horizontal direction.
The manufacturing method of the packaging bag as described in any one of Claims 12-14 characterized by the above-mentioned. Between the vertical sealing step and the horizontal sealing step, the non-seal portion (32) of the back pasting portion (3) is guided along the vertical direction.
The manufacturing method of the packaging bag of Claim 15 characterized by the above-mentioned. Between the vertical sealing step and the horizontal sealing step, the non-sealing portion (32) is guided so that the back pasting portion (3) is gradually inclined in one direction along the vertical direction.
The manufacturing method of the packaging bag of Claim 16 characterized by the above-mentioned. Between the vertical sealing step and the horizontal sealing step, at least a part of the non-sealing portion (32) of the back pasting portion (3) is sealed in the horizontal sealing region of the horizontal sealing step or its adjacent position. Having a shape-retaining seal process,
The manufacturing method of the packaging bag as described in any one of Claims 15-17 characterized by the above-mentioned.

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