Bag making machine

Abstract

A bag making machine capable of efficiently manufacturing a bag having a gusset is provided. A first body member and a second body member are fed in a lengthwise direction while overlapping each other. A side panel is temporarily fixed to the second body member, and a pair of opening edges are formed by a dividing device. The opening edges are aligned with a line of weakness of the first body member while the first body member and the second body member overlap each other. The side panel is temporarily sealed to the first body member and the second body member by a temporary sealing device to form a temporary sealing portion. The first body member is guided, divided along the line of weakness, and folded at a divided edge side thereof. The side panel is unfolded at a position of the opening edges to form an unfolded surface by the guiding of the body members and the temporary sealing portion. Then, a gusset member is arranged to overlap the folded portion of the body members and the unfolded surface of the side panel.

Description

TECHNICAL FIELD

[0001] The present application relates to a bag making machine and a bag making method for making a bag having a face end portion. BACKGROUND

[0002] A bag such as a plastic bag includes a body portion, a side wall portion, and a face end portion. The face end portion sometimes becomes a bottom portion, more specifically, a bottom wall portion. Such a bag is called a gusset bag. Patent Literature 1 and Patent Literature 2 disclose bag making machines for such a bag.

[0003] In the bag making machine, for example, two continuous body pieces are overlapped with each other and fed in the length direction thereof. In the bag making machine, a side wall piece and a face end piece (a bottom wall piece) are assembled to the body pieces. In the bag making machine, the body pieces, the side wall pieces, and the face end pieces are heat-sealed. In the bag making machine, the body pieces, the side wall pieces, and the face end pieces are crosscut in the width direction of the body pieces, and a bag is manufactured. In the bag making machine, the body portion is formed by the body pieces, the side wall portion is formed by the side wall pieces, and the face end portion is formed by the face end pieces.

[0004] Patent Literature 1 discloses two kinds of bag making machines. In one of the bag making machines, one bag is manufactured every time crosscutting is performed. In the other of the bag making machines, two bags are manufactured every time crosscutting is performed. The former is called single-row bag making, and the latter is called double-row bag making. Double-row bag making is attracting attention from the viewpoint of manufacturing efficiency.

[0005] In the latter bag making machine, two side wall pieces are arranged between the upper and lower body pieces, and the side wall pieces are temporarily sealed to the upper and lower body pieces. Further, the bag making machine divides the upper body piece into two parts in the length direction thereof, and supplies the face end piece to the lower body piece through a gap of the divided upper body piece and temporarily fixes the face end piece. Further, the bag making machine bends the upper body piece on one pair of division edges and forms a spread surface by spreading the two side wall pieces using the bending and the temporary sealing.

[0006] In order to achieve the process, the arrangement of the side wall pieces needs to be such that one side wall piece is located on one side with respect to a division line of the upper body piece, the other side wall piece is located on the other side with respect to the division line, and the two side wall pieces are arranged in one row in the width direction of the body pieces. That is, two supply operations of the side wall pieces must be performed. This is one of the reasons for reducing the manufacturing efficiency.

[0007] An object of the present application is to provide a bag making machine and a bag making method capable of efficiently manufacturing a bag having a face end portion.

[0008] PRIOR ART DOCUMENTS

[0009] PATENT LITERATURE

[0010] Patent Literature 1: International Publication No. WO2009 / 131214

[0011] Patent Literature 2: Japanese Patent No. 3655627 SUMMARY

[0012] According to an aspect of the present application, there is provided a bag making machine including:

[0013] a body member feeding device that causes a continuous first body member and a continuous second body member to overlap each other and to be fed in a length direction of the first body member and the second body member; and

[0014] a side member supplying device that, before the first body member and the second body member overlap each other, arranges a side member in the second body member in a width direction of the side member, and causes the side member to be located between the first body member and the second body member when the first body member and the second body member overlap each other, and the side member is folded in two on both sides with respect to a center line in a length direction of the side member,

[0015] the bag making machine further includes:

[0016] a temporary fixing device that temporarily fixes the side member to the second body member before the first body member and the second body member overlap each other; and

[0017] a dividing device that, after the side member is temporarily fixed and before the first body member and the second body member overlap each other, divides the side member to form an opening edge, causes the opening edge to align with a first frangible line of the first body member when the first body member and the second body member overlap each other, and the opening edge extends in the width direction of the side member, the first frangible line extending in the length direction of the first body member,

[0018] the bag making machine further includes:

[0019] a temporary sealing device that, after the first body member and the second body member overlap each other, seals the side member to the first body member and the second body member to form a temporary sealing portion; and

[0020] a first guide device that guides the first body member as the first body member and the second body member are fed, divides the first body member along the first frangible line, and bends the first body member along a bending line on a side of a divided edge of the first body member, the side member being unfolded at a position of the opening edge by the guidance of the first body member by the first guide device and the temporary sealing portion to form an unfolded surface, the bending line extending in the length direction of the first body member,

[0021] the bag making machine further includes:

[0022] The end face member supply device configures a continuous end face member to the first body member in a length direction of the first body member and overlaps the end face member with a bent portion of the first body member and the development surface as the first body member and the second body member are fed,

[0023] The body portion of the bag is formed by the first body member and the second body member, the side wall portion of the bag is formed by the side wall member, and the end face portion of the bag is formed by the end face member.

[0024] The second fragile line can be formed in the side wall member so as to extend in a width direction of the side wall member. The dividing device can divide the side wall member along the second fragile line.

[0025] The dividing device can include:

[0026] a suction chuck for sucking the side wall member; and

[0027] a moving mechanism that moves the suction chuck away from the side wall member while sucking the side wall member, thereby tearing the side wall member along the second fragile line.

[0028] The temporary fixing device can temporarily fix both sides of the side wall member with respect to the second fragile line to the second body member, thereby forming an unattached region in which a portion of the side wall member including the second fragile line is not attached to the second body member.

[0029] The dividing device can include a blade and a moving mechanism that moves the blade to a position in which the blade enters between the side wall member and the second body member at the unattached region as the second body member is fed. The moving mechanism can move the blade away from the second body member while the blade passes between the side wall member and the second body member, thereby tearing the side wall member along the second fragile line.

[0030] The dividing device can include a blade. The blade can be configured so that a front end of the blade enters between the side wall member and the second body member at the unattached region as the second body member is fed. The blade can have an inclined edge that extends obliquely away from the second body member toward a feeding direction of the second body member. The side wall member can jump over the inclined edge as the side wall member is fed with the second body member, thereby being torn along the second fragile line by the inclined edge.

[0031] The dividing device can include a wire and a support member that supports the wire to pass between the side wall and the second body member in the unattached region when the side wall is temporarily fixed to the second body member. The wire can have a portion that enters a feed path of the side wall downstream of the temporary fixing device. The side wall can be torn by the wire along the second fragile line as it is fed with the second body member.

[0032] The dividing device can further include a pressing member that is provided to press the side wall on both sides with respect to the wire when the side wall is torn by the wire along the second fragile line.

[0033] The dividing device can include a slitting member that is used to slit the side wall as the first body member and the second body member are fed.

[0034] The bag making machine can further include:

[0035] An unfolding face sealing device that, after the end face member is disposed, heat seals the side wall to the first body member and the second body member and the end face member in a width direction of the first body member and the second body member to form an auxiliary seal portion in at least diagonals of the unfolding face;

[0036] A second guide device that, after the auxiliary seal portion is formed, further guides the first body member as the first body member and the second body member are fed, folds the first body member along the bending line, and folds the end face member by folding of the first body member; and

[0037] A longitudinal heat sealing device that, after the first body member is folded, heat seals the end face member to the first body member and the second body member in a length direction of the first body member and the second body member along the dividing rim to form a longitudinal seal portion.

[0038] The bag making machine can further include:

[0039] A transverse heat sealing device that, after the end face member is disposed, heat seals the side wall to the first body member and the second body member and the end face member in a width direction of the first body member and the second body member to form a transverse seal portion in at least a range of a length of the side wall as a whole;

[0040] A slitting device that, after the transverse seal portion is formed, slits the first body member and the second body member, the side wall, and the end face member in a length direction of the first body member and the second body member along the dividing rim; and

[0041] A cross-cutting device cuts the first body piece and the second body piece, the side wall piece, and the end face piece at a position of the transverse seal portion in a width direction of the first body piece and the second body piece after slitting by the slitting device, thereby manufacturing the bag.

[0042] According to still another aspect of the present application, there is provided a bag manufacturing method,

[0043] The bag manufacturing method includes:

[0044] overlapping a continuous first body piece and a continuous second body piece with each other and feeding in a length direction of the first body piece and the second body piece,

[0045] arranging a side wall piece to the second body piece in a width direction of the second body piece before overlapping the first body piece and the second body piece, and positioning the side wall piece between the first body piece and the second body piece when overlapping the first body piece and the second body piece with each other,

[0046] the side wall piece is folded in two in a width direction of the side wall piece with respect to a center line in a length direction of the side wall piece,

[0047] The bag manufacturing method can further include:

[0048] temporarily fixing the side wall piece to the second body piece before overlapping the first body piece and the second body piece,

[0049] dividing the side wall piece to form an opening edge after temporarily fixing the side wall piece and before overlapping the first body piece and the second body piece, aligning the opening edge with a first fragile line of the first body piece when overlapping the first body piece and the second body piece with each other, and extending the opening edge in a width direction of the side wall piece, the first fragile line extending in a length direction of the first body piece,

[0050] The bag manufacturing method can further include:

[0051] sealing the side wall piece to the first body piece and the second body piece to form a temporary seal portion after overlapping the first body piece and the second body piece,

[0052] guiding the first body piece as the first body piece and the second body piece are fed after forming the temporary seal portion, dividing the first body piece along the first fragile line, and bending in a bending line on a side of a divided edge of the first body piece, the bending line extending in a length direction of the first body piece,

[0053] The bag manufacturing method can further include:

[0054] The side wall member is unfolded at the position of the opening edge by the guide of the first body member and the temporary seal portion to form an unfolded surface,

[0055] With the feeding of the first body member and the second body member, a continuous end surface member is arranged in the length direction of the first body member with respect to the first body member, and the end surface member is overlapped with the bent portion of the first body member and the unfolded surface of the side wall member,

[0056] The first body member and the second body member form a body portion of the bag, the side wall member forms a side wall portion of the bag, and the end surface member forms an end surface portion of the bag.

[0057] A second weak line can be formed in the side wall member in a manner extending in the width direction of the side wall member. In the bag making method, the side wall member is divided along the second weak line to form the opening edge.

[0058] The bag making method can further include:

[0059] After the end surface member is arranged, the side wall member is heat-sealed to the first body member and the second body member and the end surface member in the width direction of the first body member and the second body member to form an auxiliary seal portion in at least the diagonal of the unfolded surface,

[0060] After the auxiliary seal portion is formed, the first body member is further guided with the feeding of the first body member and the second body member, the first body member is folded back along the bending line, the unfolded surface is closed by the folding back of the first body member, and the end surface member is folded in half,

[0061] After the first body member is folded back, the end surface member is heat-sealed to the first body member and the second body member in the length direction of the first body member and the second body member along the division edge to form a longitudinal seal portion,

[0062] After the end surface member is arranged, the side wall member is heat-sealed to the first body member and the second body member and the end surface member in the width direction of the first body member and the second body member to form a transverse seal portion in at least the entire length of the side wall member,

[0063] After the transverse seal portion is formed, the first body member and the second body member, the side wall member, and the end surface member are cut along the division edge of the first body member in the length direction of the first body member and the second body member,

[0064] After slitting, the first and second body pieces, the side wall piece, and the end face piece are cut in the width direction of the first and second body pieces at the position of the transverse seal portion, thereby manufacturing the bag. BRIEF DESCRIPTION OF DRAWINGS

[0065] FIG. 1A is a plan view schematically showing an upstream portion of a bag making machine of an embodiment, FIG. 1B is FIG. 1A a schematic side view.

[0066] FIG. 2 is a plan view schematically showing FIG. 1A a downstream portion of the bag making machine of

[0067] FIG. 3 illustrates a bag.

[0068] FIG. 4A is a sectional view of a side wall piece, FIG. 4B a temporary fixing of a side wall piece is described, FIG. 4C shows a pinhole for a side wall piece, FIG. 4D a division of a side wall piece is described, FIG. 4E a formation of an auxiliary seal portion is described.

[0069] FIG. 5A , FIG. 5B shows a pinhole cutter for a side wall piece.

[0070] FIG. 6A shows an example of a division device, FIG. 6B shows a side view thereof.

[0071] FIG. 7A shows an example of a division device, FIG. 7B a temporary fixing is described.

[0072] FIG. 8A-FIG. 8C a division of a side wall piece is described.

[0073] FIG. 9A-FIG. 9C a division of a side wall piece is described.

[0074] FIG. 10A-FIG. 10C shows an example of a division device and a division of a side wall piece is described.

[0075] FIG. 11A-FIG. 11C shows an example of a division device.

[0076] FIG. 12A shows FIG. 11B a modification example thereof, FIG. 12B-FIG. 12D is FIG. 11B or FIG. 12A a Q-Q line sectional view of or a pressing member is illustrated, respectively.

[0077] FIG. 13A indicates an example of a partitioning device, FIG. 13B FIG. 13A FIG. 13C indicates a side view of FIG. 13A

[0078] FIG. 14

[0079] FIG. 15A FIG. 14 FIG. 15B FIG. 14

[0080] FIG. 16A FIG. 16B FIG. 16A FIG. 16C

[0081] FIG. 17A FIG. 17B

[0082] FIG. 18

[0083] FIG. 19

[0084] FIG. 20A FIG. 20B FIG. 20A FIG. 20C

[0085] FIG. 21

[0086] FIG. 22

[0087] [Explanation of symbols]

[0088] 1, 2: body member

[0089] 3: side member

[0090] 4: end face member

[0091] 5: bag ​​​​​​​​​​​​​​​​​​​​​​

[0092] 6: Body part

[0093] 7: Side panel

[0094] 8: End face

[0095] 15: Body component feeding device

[0096] 19: Side panel supply device

[0097] 20: Temporary fixing device

[0098] 21: Temporary fixing part (attachment area)

[0099] 21a: Unattached area

[0100] 22: Vulnerable lines (pin holes) of the main component

[0101] 23: Fragile Line Formation Device

[0102] 24: Pinhole cutting tool

[0103] 241: Rotating shaft of pin hole tool

[0104] 25: Vulnerable lines (pin holes) in the side panel.

[0105] 251: Long fine hole

[0106] 252: Short fine pores

[0107] 27: Temporary sealing section

[0108] 28: Temporary sealing device

[0109] 29: Dividing edge

[0110] 30: Bend line

[0111] 31: Opening edge

[0112] 32: Unfolded surface

[0113] 33: Guiding device

[0114] 34: Bending section

[0115] 35: End face component supply device

[0116] 37: Surface sealing device

[0117] 38: Guiding device

[0118] 39: Longitudinal sealing section

[0119] 40: Longitudinal sealing device

[0120] 41: Lateral sealing part

[0121] 42: transverse sealing device

[0122] 43: slitting device

[0123] 44: cross-cut device

[0124] 48: auxiliary sealing portion

[0125] 60: dividing device

[0126] 600: suction pad

[0127] 601: moving mechanism

[0128] 610: blade

[0129] 611: moving mechanism

[0130] 613: inclined edge

[0131] 620: wire

[0132] 623: pressing member

[0133] 630: slitting member

[0134] X1: feeding direction of body member

[0135] Y: width direction of body member (length direction of side member) DETAILED DESCRIPTION

[0136] Hereinafter, a bag making machine and a bag making method according to an embodiment will be described with reference to the drawings.

[0137] A bag making machine according to an embodiment is shown in FIG. 1A , FIG. 1B and FIG. 2 . The bag making machine makes a bag 5 of FIG. 3 using a first body member 1, a second body member 2, a side member 3 and an end face member 4. In each of the embodiments below, the bag 5 is a square bottom bag, and is a plastic bag, and the first body member 1, the second body member 2, the side member 3 and the end face member 4 are plastic films. These members 1 to 4 can also be composed of, for example, a base of paper and a film or a resin material which is partially or entirely laminated to the base, instead of plastic films.

[0138] The bag 5 includes two body portions 6, two side portions 7 and an end face portion 8. The two body portions 6 face each other and have two side edges 9 and two end edges 10 and 11. One end edge is a bottom edge 10, and the other end edge is a top edge 11.

[0139] Two side panels 7 are paired. A pair of side panels 7 extend along the two side edges 9 and fold between the two main body parts 6, and are folded in half. One end of the side panel 7 is folded between the two layers of the side panel 7 and folded in half, thereby forming an auxiliary panel 12. In addition, the other end of the side panel 7 is folded towards the outer surface of the side panel 3 in the folded state, thereby forming a triangular wing 45.

[0140] The end portion 8 extends along the bottom edge 10 and folds between the two main body portions 6 and the auxiliary enclosure portion 12, and is then folded in half. Therefore, the end portion 8 functions as the bottom enclosure portion.

[0141] The side enclosure 7 is heat-sealed to the two body portions 6 along both side edges 9. Furthermore, the end portion 8 is heat-sealed to the auxiliary enclosure 12 along both side edges 9. Thus, a first sealing portion 13 is formed along both side edges 9. The end portion 8 is heat-sealed to the two body portions 6 along the bottom edge 10. Thus, a second sealing portion 14 is formed along the bottom edge 10. The top edge 11 is open.

[0142] The bag 5 can be expanded using the side circumference 7, thereby increasing its capacity. When the bag 5 is expanded, the end face 8 (bottom circumference) forms a flat bottom base, allowing the bag 5 to stand upright.

[0143] like FIG. 1A , FIG. 1B As shown, the bag-making machine includes a body component feeding device 15. The body component feeding device 15 is configured to feed consecutive first body components 1 and consecutive second body components 2, which overlap each other. Its feeding direction X1 is the length direction of body components 1 and 2. In this embodiment, body component 1 is the upper body component, and body component 2 is the lower body component. Body components 1 and 2 are fed intermittently; that is, body components 1 and 2 repeatedly feed and stop.

[0144] The body component feeding device 15 includes a guide roller 16 and a feed roller pair 17. FIG. 2 Body 1 and body 2 are drawn from their respective blank rolls. Alternatively, a wide sheet (e.g., a film containing plastic) can be drawn from one blank roll and cut into two body parts 1 and 2. Body 1 is guided by guide roller 16, and body parts 1 and 2 overlap each other. FIG. 2 Only one of the feed rollers 17 is shown. The feed rollers 17 are driven by a motor and rotate intermittently, feeding the body 1 and body 2 intermittently in direction X1.

[0145] The bag making machine also includes a side panel feeding device 19 ( FIG. 1A). The side wall member supply device 19 is configured to supply the side wall member 3 to the body member 2 before the body members 1, 2 are overlapped with each other, and to arrange the side wall member 3 on the body member 2 in the width direction of the body members 1, 2. The side wall member 3 is positioned between the body members 1, 2 when the body members 1, 2 are overlapped with each other.

[0146] The side wall member 3 is folded in two at both sides with respect to the length direction center line 3a thereof. Therefore, as shown in FIG. 2, the side wall member 3 has a flat cylindrical shape. The side wall member 3 is somewhat wider than twice the width of the side wall portion 7, and somewhat longer than twice the length of the side wall portion 7. As shown in FIG. 3, the corners of both ends of the side wall member 3 are folded at an angle of 45°, and a delta wing 46 is formed at both ends of the side wall member 3. FIG. 4A FIG. 1A

[0147] The side wall member supply device 19 supplies the side wall member 3 to the body member 2 and arranges the side wall member 3 on the upper surface of the body member 2 in the width direction of the body members 1, 2 every time the intermittent feeding of the body members 1, 2 is performed. Therefore, the side wall member 3 is positioned between the body members 1, 2 when the body members 1, 2 are overlapped with each other by the body member feeding device 15. The side wall member supply device 19 employs a well-known structure.

[0148] The bag making machine further includes a temporary fixing device 20 FIG. 1B ). The temporary fixing device 20 is configured to temporarily fix the side wall member 3 to the body member 2 to form a temporary fixing portion 21 (attachment region) FIG. 4B ). The temporary fixing device 20 is, for example, an ultrasonic device. The temporary fixing device 20 temporarily fixes the side wall member 3 to the body member 2 in the form of, for example, ultrasonic sealing or heat sealing to form the temporary fixing portion 21 on the length direction center line 3a of the side wall member 3 every time the intermittent feeding of the body members 1, 2 is performed. The side wall member supply device 19 arranges the side wall member 3 on the body member 2 during the stop of the body members 1, 2, and the temporary fixing device 20 temporarily fixes the side wall member 3 to the body member 2 immediately thereafter.

[0149] The bag making machine further includes a fragile line forming device 23 FIG. 1B ). The fragile line forming device 23 is configured to form a first fragile line 22 FIG. 1A ) on the body member 1 before the body members 1, 2 are overlapped. The first fragile line 22 extends in the length direction of the first body member 1. The first fragile line 22 is a pinhole in the embodiment. The pinhole 22 includes a plurality of holes arranged in series.

[0150] ​​The line of weakness forming device 23 includes a pinhole cutter 24 disposed upstream of the position where the body piece 1 and the body piece 2 are overlaid with each other in the embodiment. The pinhole cutter 24 includes a plurality of blades in the entire range of the circumference thereof, at least one of which engages with the body piece 1. The pinhole cutter 24 is rotated with the feeding of the body piece 1, and forms the pinhole 22 in the body piece 1 by the pinhole cutter 24.

[0151] The bag making machine further includes an additional line of weakness forming device in the embodiment. The additional line of weakness forming device is configured to form a second line of weakness 25 extending in the width direction of the side piece 3 in the side piece 3 before the side piece 3 is disposed to the body piece 2. FIG. 1A ) The line of weakness 25 of the embodiment is also a pinhole. As shown in FIG. 4C The pinhole 25 includes a first hole 251 and a plurality of second holes 252. The first hole 251 is located at the central portion in the width direction of the side piece 3. The second holes 252 are located at both sides of the first hole 251. The length of the first hole 251 in the width direction of the side piece 3 is longer than the length of each of the second holes 252 in the width direction of the side piece 3. This is to facilitate the division of the side piece 3 described later.

[0152] Another line of weakness forming device includes another pinhole cutter 26 as shown in FIG. 5A for example. The pinhole cutter 26 has blades corresponding to the shape of the pinhole 25. The device punches the side piece 3 with the pinhole cutter 26 to form the pinhole 25 in the side piece 3. Further, the side piece supply device 19 supplies the side piece 3 with the pinhole 25 to be disposed to the body piece 2.

[0153] The bag making machine further includes a division device 60. The division device 60 is configured to divide the side piece 3 to form a pair of opening edges 31 FIG. 4D after the side piece 3 is temporarily fixed and before the body piece 1 and the body piece 2 are overlaid with each other, the pair of opening edges 31 being aligned with the first line of weakness (pinhole) 22 when the body piece 1 and the body piece 2 are overlaid with each other by the body piece feeding device 15. The division device 60 divides the side piece 3 at each time of the intermittent feeding. In the embodiment, the side piece 3 is divided into two parts.

[0154] FIG. 6A 、 FIG. 6B An example of the division device 60 is shown. FIG. 6BThe symbol Y indicates the width direction of the body piece 2 (and the length direction of the side piece 3, respectively). In the embodiment, the dividing device 60 includes two suction pads 600 positioned downstream of the temporary fixing device 20 and upstream of the position at which the body piece 1 and the body piece 2 overlap each other in order to suck the side piece 3, and a moving mechanism 601 configured to move the suction pads 600, respectively. The moving mechanism 601 may, for example, include an arm provided for each suction pad 600 to move the corresponding suction pad 600.

[0155] The moving mechanism 601, in the stop of the body piece 1 and the body piece 2, sucks one layer (upper layer) of the side piece 3 on both sides with respect to the pinhole 25 (second fragile line) by the suction pads 600. FIG. 6B Then, in the stop of the body piece 1 and the body piece 2, the moving mechanism 601 moves the suction pads 600 in the direction away from the side piece 3 as indicated by the dotted arrows. FIG. 6B Since the other layer (lower layer) of the side piece 3 is temporarily fixed to the body piece 2 on the length direction center line 3a, the upper layer of the side piece 3 is pulled up by the suction pads 600 on both sides with respect to the pinhole 25 and is torn along the pinhole 25. Thus, the side piece 3 is divided along the pinhole 25 to form a pair of opening edges 31. This is repeated at each intermittent feeding.

[0156] The dividing device 60 can also divide the side piece 3 using the suction pads 600 and a pressing member (not shown). The dividing device 60 presses the side piece 3 on one side with respect to the pinhole 25 by the pressing member and sucks the side piece 3 on the other side with respect to the pinhole 25 by the suction pads 600. Then, the dividing device 60 can move the suction pads 600 to tear the side piece 3 along the pinhole 25.

[0157] As shown in Figs. 4 and 5, FIG. 1A , FIG. 1B The bag making machine further includes a temporary sealing device 28. The temporary sealing device 28 is configured to seal the side piece 3 to the body piece 1 and the body piece 2 to form a temporary sealing portion 27 after the body piece 1 and the body piece 2 are overlapped. FIG. 1A The temporary sealing portion 27 is used to form a development surface described later. Each time the intermittent feeding of the body piece 1 and the body piece 2 is performed, the temporary sealing device 28 seals one layer of the side piece 3 to the body piece 1 and seals the other layer of the side piece 3 to the body piece 2. Thus, a pair of temporary sealing portions 27 are formed, one of which is located on one side with respect to the opening edge 31 (and the pinhole 22 aligned therewith, respectively) and the other of which is located on the other side with respect to the opening edge 31. The temporary sealing device 28 may, for example, seal the side piece 3 to the body piece 1 and the body piece 2 in the form of heat sealing or ultrasonic sealing.

[0158] The bag making machine further includes a first guide device 33. The first guide device 33 is configured to guide the body piece 1 along with the feeding of the body piece 1, the body piece 2, to divide the body piece 1 into two portions along the tacking hole 22, and to bend the body piece 1 along the bend line 30 on the side of the two divided edges 29 after the temporary seal portion 27 is formed. Further, the first guide device 33 is configured to spread the side wall piece 3 at the position of the pair of opening edges 31 to form the two spread surfaces 32 using the guidance of the body piece 1 and the temporary seal portion 27. FIG. 1A , FIG. 4E ).

[0159] The first guide device 33 includes guide members such as guide rollers, plates, pinch rollers, and the like as in Patent Document 1. The body piece 1 is divided into two portions along the tacking hole 22 using the guide members along with the feeding of the body piece 1, the body piece 2. The pair of divided edges 29 is generated by the division of the body piece 1. Further, the body piece 1 is bent along the pair of bend lines 30 on the side of the divided edges 29 by the first guide device 33 along with the feeding of the body piece 1, the body piece 2. Thus, the pair of bent portions 34 is formed using the body piece 1. The bend lines 30 extend in the length direction of the body piece 1, the body piece 2.

[0160] The temporary seal portion 27 causes the layer on the upper side of the side wall piece 3 to adhere to the body piece 1, and causes the layer on the lower side of the side wall piece 3 to adhere to the body piece 2. Therefore, the layer on the upper side of the side wall piece 3 is pulled up by the temporary seal portion 27 when the body piece 1 is bent (lifted). By the pulling up, the side wall piece 3 is spread at the position of the opening edge 31 to form the pair of spread surfaces 32. The spread surfaces 32 each have a substantially rhombus shape.

[0161] The bag making machine further includes an end face piece supply device 35. The end face piece supply device 35 is configured to supply a continuous end face piece 4 to the body piece 1 along with the feeding of the body piece 1, the body piece 2, and to arrange the end face piece 4 in the length direction of the body piece 1 (the bent portion 34 thereof) so as to overlap the pair of bent portions 34 and the pair of spread surfaces 32. The end face piece 4 is somewhat wider than twice the width of the end face portion 8 of the bag 5.

[0162] The end face piece supply device 35 includes a guide roller 36. The end face piece 4 is drawn out from a blank roll. The end face piece 4 is guided by the guide roller 36 to be supplied to the body piece 1 and arranged in the length direction of the body piece 1, the body piece 2 so as to overlap the pair of bent portions 34 and the pair of spread surfaces 32 along with the feeding of the body piece 1, the body piece 2. Further, a wide web (for example, a film containing plastic) can be drawn out from a blank roll and cut in the length direction thereof to be divided into the end face piece 4 and the body piece 1 or the body piece 2 as in Japanese Patent No. 6381169.

[0163] The bag making machine further includes a developing face sealing device 37. The developing face sealing device 37 is configured to seal the side wall 3 to the body 1, the body 2 and the end face 4 in the width direction of the body 1, the body 2 after the supply of the end face 4, to form an auxiliary seal portion 48 (only in the FIG. 4E width direction of the body 1, the body 2 is shown in the middle).

[0164] The developing face sealing device 37 includes, for example, a heat sealing bar. The developing face sealing device 37 heat seals the side wall 3 to the body 1, the body 2 and the end face 4 in the width direction of the body 1, the body 2 along the diagonal line of the pair of developing faces 32 using the heat sealing bar every time the intermittent feeding of the body 1, the body 2 is performed. Thus, the auxiliary seal portion 48 is formed in at least the diagonal line of the developing face 32. The end face 4 is attached to the pair of developing faces 32 through the auxiliary seal portion 48.

[0165] The bag making machine further includes a second guide device 38. The second guide device 38 is configured to guide the body 1 as the body 1, the body 2 is fed after the formation of the auxiliary seal portion 48, and to fold the body 1 back along the bending line 30, and to close the developing face 32 to form the auxiliary wall 18 and to fold the end face 4 by the folding of the body 1 back.

[0166] The second guide device 38 includes a guide member such as a guide roller, a plate, a pinch roller, and the like. The body 1 is guided by the guide member as the body 1, the body 2 is fed, and the body 1 is folded back along the pair of bending lines 30. By the folding of the body 1 back, the pair of developing faces 32 is closed to form two auxiliary walls 18 from the developing faces 32. Further, by the folding of the body 1 back, the end face 4 is folded on both sides with respect to the center line in the length direction (parallel to the length direction of the body 1, the body 2) of the end face 4. As a result, the folded end face 4 is disposed between the body 1 and the body 2, and further, between the respective auxiliary walls 18 formed from the developing faces 32. In addition, the pair of dividing edges 29 are aligned with each other.

[0167] As shown in FIG. 2 the bag making machine further includes a longitudinal seal device 40. The longitudinal seal device 40 is configured to heat seal the end face 4 to the body 1, the body 2 along the dividing edge 29 in the length direction of the body 1, the body 2 to form a longitudinal seal portion 39 along the dividing edge 29 after the body 1 is folded back. The longitudinal seal device 40 includes a pair of heat sealing bars, and heat sealing is performed using the heat sealing bars every time the intermittent feeding of the body 1, the body 2 is performed to form the longitudinal seal portion 39.

[0168] The bag making machine further includes a transverse sealing device 42. The transverse sealing device 42 is configured to heat seal the side panels 3 to the body panels 1, 2 and the end panels 4 in the width direction of the body panels 1, 2 after the end panels 4 are arranged to the body panels 1, and to form the transverse seal portions 41 in at least the entire length of the side panels (preferably in the entire width of the body panels 1, 2).

[0169] The transverse sealing device 42 includes two sets of a pair of heat sealing bars, and heat seals using the heat sealing bars to form the transverse seal portions 41 each time the intermittent feeding of the body panels 1, 2 is performed. The auxiliary seal portions 48 are included in the transverse seal portions 41 and integrated therewith. In the embodiment, the transverse heat sealing is performed after the body panels 1 are folded back. The position of the heat sealing is the position of the lengthwise center line 3a of the side panels 3. Therefore, the transverse seal portions 41 extend along the center line 3a. The end panels 4 are arranged between the auxiliary side panels 18 of the side panels 3, and therefore are heat sealed to the side panels 3 at the positions of the auxiliary side panels 18.

[0170] The bag making machine further includes a slitting device 43. The slitting device 43 is configured to slit the body panels 1, 2, the side panels 3 and the end panels 4 in the length direction of the body panels 1, 2 as the body panels 1, 2 are fed. The position of the slitting is the position of the pair of split lines 29 aligned with each other, and therefore is the position of the longitudinal seal portions 39 in the embodiment. Thus, the body panels 2 and the end panels 4 are also split.

[0171] The slitting device 43 includes a pair of slitting members arranged at intervals in the width direction of the body panels 1, 2 as in the patent document 1. The body panels 1, 2, the side panels 3 and the end panels 4 are slit by the slitting members along the split lines 29 as the body panels 1, 2 are fed. Although a margin is generated between the slitting members, the body panels 1, 2 are hoisted by a known hoist as in the patent document 1 and separated from the body panels 1, 2 as dregs.

[0172] The bag making machine further includes a cross cutting device 44. The cross cutting device 44 is configured to cross cut the body panels 1, 2, the side panels 3 and the end panels 4 in the width direction of the body panels 1, 2 after the slitting is performed, and thereby to manufacture the bags 5. The position of the cross cutting is the position of the transverse seal portions 41.

[0173] The cross cutting device 44 of the bag making machine includes a cutter. The cross cutting device 44 cross cuts the body panels 1, 2, the side panels 3 and the end panels 4 in the width direction of the body panels 1, 2 at the position of the transverse seal portions 41 using the cutter each time the intermittent feeding of the body panels 1, 2 is performed. Thus, two bags 5 are manufactured each time the cross cutting is performed in the embodiment.

[0174] Therefore, the body portion 6 of the bag 5 is formed using body member 1 and body member 2, the side portion 7 is formed using side member 3, and the end portion 8 is formed using end member 4. More specifically, the auxiliary portion 12 is formed using auxiliary member 18. The second sealing portion 14 is formed using longitudinal sealing portion 39. The first sealing portion 13 is formed using transverse sealing portion 41. In addition, the triangular wing portion 45 is formed using triangular wing 46.

[0175] The opposing surfaces of the body parts 1 and 2 are formed with a sealant such as polyethylene or polypropylene, while their opposite surfaces are formed with a substrate such as nylon or polyethylene terephthalate (PET). The outer surface of the folded side panel 3 is formed with a sealant, while its inner surface is formed with a substrate. The opposing surface of the end face 4, which faces the body parts 1 and 2, is formed with a sealant, while its opposite surface is formed with a substrate. Heat sealing of the films is achieved through the sealant. These are the same as in Patent Documents 1 and 2.

[0176] The bag making machine may include a filling device for filling the contents of the bag 5 from the top edge 11, and an additional sealing device for heat-sealing the two body parts 6 together along the top edge 11 after the filling process.

[0177] FIG. 7A This illustrates another example of a dividing device 60. The dividing device 60 includes: a blade 610 located downstream of the temporary fixing device 20 and upstream of the body members 1 and 2, where they overlap; and a moving mechanism 611 that brings the blade 610 closer to and separates it relative to the body member 2. The blade 610 includes an R-shaped front end (upstream end) to avoid damaging the side member 3. The blade 610 and the pinhole 25 of the side member 3, which is temporarily fixed to the body member 2 by the temporary fixing device 20, are aligned in the feed direction X1. The moving mechanism 611 may include an actuator, such as a cylinder, to move the blade 610 up and down.

[0178] like FIG. 7B As shown, the temporary fixing device 20 temporarily fixes the side panel 3 to the body member 2 on both sides relative to the pin hole 25, forming an unattached area 21a of the side panel 3, including the portion with pin hole 25, that is not attached to the body member 2. That is, the temporary fixing device 20 forms two temporary fixing portions 21 (attachment areas) spaced apart in the Y direction on both sides relative to the pin hole 25, and the unattached area 21a is formed between the temporary sealing portions 21 (attachment areas).

[0179] like FIG. 8AAs shown, the blade 610 is positioned close to the body 2 via the moving mechanism 611. When the blade 610 is in this position, as the body 1 and body 2 are fed, the blade 610 enters from its front end in the unattached area 21a between the side panel 3 and the body 2, and passes between them. (Ref) FIG. 8A-FIG. 8C ).

[0180] Then, as FIG. 9A-FIG. 9C As shown, while the main body 1 and main body 2 are stationary, the moving mechanism 611 moves the blade 610 away from the main body 2 (i.e., upwards), tearing the side panel 3 open along the pin hole 25 (see reference). FIG. 9A-FIG. 9C Therefore, the side panel 3 is divided along the pinhole 25 to form a pair of opening edges 31. FIG. 4D Then, the moving mechanism 611 returns the blade 610 to its original position. FIG. 8A The position is shown. Each time the body part 1 and body part 2 are intermittently fed, the side panel 3 is repeatedly divided.

[0181] In addition, such as FIG. 9A-FIG. 9C As shown, the limiting member 612 can also be arranged at intervals in the Y direction on both sides relative to the blade 610, pressing the side panel 3 when it is torn open by the blade 610. Thus, when the side panel 3 is torn open by the blade 610, the side panel 3 is prevented from peeling off from the body member 2 in the attachment area 21.

[0182] FIG. 10A-FIG. 10C Another example of using blade 610 is shown. The dividing device 60 does not include the moving mechanism 611. FIG. 7A The blade 610 is supported by a frame (not shown) and is positioned such that, as the body 1 and body 2 are fed, the tip of the blade 610 enters the unattached area 21a between the side member 3 and the body 2. The blade 610 has an R-shaped tip. The height of the blade 610 gradually increases toward the feed direction X1. Therefore, the blade 610 has an inclined edge 613 (upper edge) that extends obliquely toward the body 2 in the feed direction X1 toward the body 1 and body 2.

[0183] As the side panel 3 is fed together with the body 2, the tip of the blade 610 enters between the body 2 and the side panel 3 in the unattached area 21a. At this time, the side panel 3 jumps onto the inclined edge 613, thereby being gradually torn open along the pin hole 25 by means of the inclined edge 613. Thus, the side panel 3 is divided along the pin hole 25, forming a pair of open edges 31. The division of the side panel 3 is repeated with each intermittent feed of the body 1 and body 2.

[0184] In the example described, a limiting member 612 may also be provided to prevent the side panel 3 from peeling off from the body panel 2 in the attachment area 21 when the side panel 3 is separated.

[0185] Furthermore, when using blade 610, once the side panel 3 is torn open at its downstream side edge, it will subsequently be torn open smoothly. Therefore, the pinhole 25, for example... FIG. 5B As shown, the cutting edge at the end can be formed by a wide pinhole tool 26.

[0186] FIG. 11A-FIG. 11C Another example of the dividing device 60 is shown. FIG. 11B yes FIG. 11A A magnified view of region P. FIG. 11C yes FIG. 11B The arrow R points towards the view.

[0187] The dividing device 60 includes a wire 620; and two support members 621 that support the wire 620 so that it passes through the temporary fixing device 20 in the feed direction X1, at the side panel supply device 19. FIG. 1A When the side panel 3 is placed on the body 2, the wire 620 is aligned with the pin hole 25 between the side panel 3 and the body 2. Therefore, the wire 620 is supported by the support member 621 so that when the temporary fixing device 20 temporarily fixes the side panel 3 to the body 2, it passes between the side panel 3 and the body 2 in the unattached area 21a.

[0188] Wire 620 has a certain degree of rigidity. For example, its diameter can be approximately 1.5 mm. FIG. 11B As shown, the wire 620 has a portion 622 that enters the feed path 3b of the side panel 3 downstream of the temporary fixing device 20. The entry portion 622 is formed by a portion of the wire 620 that bends upward from a horizontal position.

[0189] like FIG. 11B , FIG. 11C As shown, the splitting device 60 may further include at least one pressing member 623 disposed downstream of the temporary fixing device 20. In an embodiment, two plate-shaped pressing members 623 are disposed at a distance in the Y direction from both sides of the wire 620.

[0190] When the side panel 3 is fed together with the main body 2, the pressing member 623 presses against the main body 2, encountering the wire 620 (entry portion 622). As the side panel 3 is further fed from this point, it is torn apart by the wire 620 along the pin hole 25. As a result, the side panel 3 is divided along the pin hole 25, forming a pair of opening edges 31. The division of the side panel 3 is repeated with each intermittent feeding of the main body 1 and the main body 2.

[0191] FIG. 11A-FIG. 11CThe wire 620 has a circular cross-section, but instead, it can also have a wedge-shaped cross-section that narrows towards the upstream side. This makes the side panel 3 easier to tear. The wire 620 can also have a polygonal cross-section, such as a quadrilateral shape, and be arranged with one corner facing upstream. This also makes the side panel 3 easier to tear.

[0192] like FIG. 12A As shown, the entry portion 622 of the wire 620 can also be composed of an inclined portion forming an angle θ1 relative to the body 2. Furthermore, FIG. 12B-FIG. 12D yes FIG. 11B or FIG. 12A The QQ line cross-section illustrates other pressing members 623. Only one pressing member 623 may be provided, for example, it may include a hole 624 allowing wire 620 (entry portion 622) to pass through. FIG. 12B ) or cut 625 ( FIG. 12C or FIG. 12D ). FIG. 12D The cut 625 widens towards the downstream at an angle θ2. Alternatively, the entry portion 622 of the wire 620 may also be formed into a downwardly protruding curved shape.

[0193] In use FIG. 12A Wire 620 and FIG. 12D When the pressing member 623 is in use, the stress used to tear the side panel 3 can be adjusted by adjusting the tilt angles θ1 and θ2. That is, when the wire 620 and FIG. 12D When the pressing member 623 stretches and tears the side panel 3 in the direction Y, if the tensile force (F) is evenly distributed in the direction X1, it is not easy to apply the maximum tensile force to the downstream edge of the side panel 3, and therefore it is not easy to tear it. If θ1 is small and θ2 is large, the tendency is strong. Conversely, if θ1 is large and θ2 is small, it is easy to apply the maximum tensile force to the downstream edge of the side panel 3. However, if θ1 is too large, close to 90 degrees, deformation such as wrinkles is likely to occur before the downstream edge is torn. Therefore, by selecting the combination of θ1 and θ2, the distribution of the tensile force (F) in the direction X1 can be made into an appropriate distribution in which the tensile force (F) is maximized at the downstream edge. θ1 is preferably in the range of 10 degrees to 40 degrees, and θ2 is preferably in the range of 0 degrees to 30 degrees.

[0194] FIG. 13A , FIG. 13BA further example of the dividing device 60 is shown. The dividing device 60 includes a slitting member 630 for the side wall member, which is disposed upstream of the position where the body member 1 and the body member 2 overlap each other, downstream of the temporary fixing device 20. The slitting member 630 is supported by a support member 631 in a clamped manner, with the front end thereof positioned at the position where the body member 2 is caught. The side wall member 3, which is temporarily fixed to the body member 2, is slit by the slitting member 630 along the tacking hole 25 as the body member 1 and the body member 2 are fed. As a result, the side wall member 3 is divided along the tacking hole 25, forming a pair of open edges 31. The division of the side wall member 3 is repeated each time the body member 1 and the body member 2 are intermittently fed.

[0195] In the case of using the slitting member 630, the tacking hole 25 can also not be formed in the side wall member 3. This is also the case in the following embodiments. Furthermore, as shown in FIG. 13B The dividing device 60 can also include elastic bodies 632, which are disposed at intervals in the direction Y on both sides with respect to the slitting member 630. Since the side wall member 3 has FIG. 4A such a cylindrical shape, poor slitting of the side wall member 3 can occur. Since the elastic bodies 632 press the side wall member 3 on both sides with respect to the slitting member 630 at the time of slitting, the side wall member 3 is reliably slit. The slitting member 630 can have a knife edge with an angle, as shown in FIG. 13A or a disc-shaped knife edge, as shown in FIG. 13C .

[0196] In the following, other embodiments are described. Identical or similar structures are denoted by identical reference numerals, and the description thereof is omitted. FIG. 14 , FIG. 15A , FIG. 15B A bag manufacturing machine of the other embodiments of the present application is shown in FIG. 16A . The bag 5 of the present application is manufactured. The auxiliary girth portion 12 of the bag 5 is formed at both ends of each side wall portion 7. Furthermore, two end face portions 8 are provided, one of which becomes a bottom face portion (which can be a bottom girth), and the other of which becomes a top face portion (which can be a top girth).

[0197] As shown in FIG. 14 , a side wall member 3, which does not have a triangular fin 46 FIG. 1A at both ends thereof, is fed to the body member 2. For example, the side wall member feeding device 19 feeds the continuous side wall member 3 as shown in FIG. 17A to the body member 2, and arranges the same in the width direction of the body member 1 and the body member 2, and cuts the side wall member 3 at a prescribed cutting position 50, for example, by means of shearing or the like, so that one side wall member 3 is positioned on the body member 2.

[0198] The dividing device 60 includes any of the structures of the foregoing examples. Depending on the structure of the dividing device 60, the tacking hole cutter 26 is used to divide the continuous side wall member 3 at prescribed intervals, as necessary, on the continuous side wall member 3,FIG. 5A or FIG. 5B ) The pinhole 25 is formed as a second fragile line in advance. Also, the dividing device 60 divides the side wall 3 temporarily fixed to the body piece 2 to form a pair of opening edges 31 at each time of intermittent feeding of the body pieces 1, 2. The pair of opening edges 31 is aligned with the pinhole 22 when the body pieces 1, 2 are overlapped with each other.

[0199] The temporary sealing device 28 seals the side wall 3 to the body pieces 1, 2 not only at both sides relative to the opening edges 31 but also at both ends of the side wall 3 to form temporary sealing portions 51 in addition to the temporary sealing portion 27.

[0200] The first guide device 33 guides the body piece 1 to spread the side wall 3 at the position of the opening edges 31 to form a spread surface 32 by the same method as in the previous embodiment. Further, the first guide device 33 guides the body piece 1 as the body pieces 1, 2 are fed and bends the body piece 1 at both side edges 52, 53 sides along an additional bending line 54. Also, the side wall 3 is spread by the bending of the body piece 1 and the temporary sealing portions 51 to form two spread surfaces 55 in addition to the spread surface 32. The bending line 54 extends in the longitudinal direction of the body pieces 1, 2.

[0201] The end surface piece supply device 35 supplies an additional continuous end surface piece 56 as the body pieces 1, 2 are fed and arranges the end surface piece 56 in the longitudinal direction of the body pieces 1, 2 to the body piece 1 (an additional bending portion 57 thereof) and overlaps the end surface piece 56 with the bending portion 57 and the spread surface 55 at the side edge 52 side.

[0202] The body piece 2 of the embodiment is wider than the body piece 1 and projects a constant distance from the side edge 53. The guide device 33 guides the body piece 2 and bends the body piece 2 at a side edge 58 side corresponding to the side edge 53 along a further bending line 59. The bending portion of the body piece 2 becomes a further continuous end surface piece 56 which overlaps the spread surface 55 at the side edge 53 and the bending portion 57 of the body piece 1. The bending line 59 extends in the longitudinal direction of the body pieces 1, 2. This is the same as in Patent Literature 2.

[0203] The spread surface sealing device 37 seals and adheres not only the end surface piece 4 to the spread surface 32 but also the end surface pieces 56 to the spread surfaces 55 which the end surface pieces 56 overlap, respectively.

[0204] The second guiding device 38 guides the body component 1 as it is fed in, and causes the body component 1 to fold back along the two bending lines 54. Furthermore, the folding back of the body component 1 folds the end face 56 in half. Then, the folding back of the body component 1 closes the unfolded surface 55, and auxiliary surrounds 18 are formed at both ends of the side surround 3.

[0205] On the side edge 52 side, the body member 2 may be bent in the same manner as on the side edge 53 side, and the bent portion may be supplied as the end face member 56. On the side edge 53 side, the end face member 56, which is separate from the body member 2, may be supplied by the end face member supply device 35 in the same manner as on the side edge 52 side.

[0206] like FIG. 15A As shown, during double-row bag making, the longitudinal sealing device 40 does not heat-seal the end face piece 4 along a pair of dividing edges 29. The longitudinal sealing device 40 includes two sets of a pair of heat-sealing rods. Each time the body piece 1 and body piece 2 are intermittently fed, the additional end face piece 56 is heat-sealed along the two side edges 52 and 53 of the body piece 1 in the length direction of the body piece 1 and body piece 2, thereby forming a longitudinal sealing part 39.

[0207] Each time the body parts 1 and 2 are intermittently fed, the transverse sealing device 42 heat-seals the side panel 3 onto the body parts 1 and 2 and the end face parts 4 and 56 in the width direction of the body parts 1 and 2, thus forming a transverse sealing part 41.

[0208] The slitting device 43, similar to the previous embodiment, uses a pair of slitting members to slit the body 1, body 2, side panel 3 and end face 4 along a pair of dividing edges 29, and uses a winch to separate the excess material generated at this time as slag from the body 1 and body 2.

[0209] During each intermittent feed of body parts 1 and 2, the transverse cutting device 44 uses a cutting tool to transversely cut body parts 1 and 2, side panels 3, end face parts 4 and 56 at the position of the transverse sealing portion 41 in the width direction of body parts 1 and 2, thereby manufacturing bag 5. Two end faces 8 are formed using end face parts 4 and 56; end face part 4 becomes the bottom / top face, and end face part 56 becomes the top / bottom face. The end face 8 formed by end face part 4 is not heat-sealed with body part 6, therefore either the bottom edge 10 or the top edge 11 is open. Here, when heat-sealing the unfolded surface 32 or 55 using the longitudinal sealing device 40, the appropriate choice can be made to open the edge depending on whether the unfolded surface is in an unfolded state or a closed state.

[0210] The bag 5 can be filled with contents in a subsequent process, and the end face part 8 formed by the end face member 4 and the body member 1 are heat-sealed to each other along the edge of the opening to form an additional second seal part 14. FIG. 16A The bag 5 having the additional second seal part 14 formed is shown.

[0211] FIG. 15B A modification example of the downstream portion of the bag making machine is illustrated. The longitudinal sealing device 40 heat-seals the end face member 4 along the pair of division edges 29 and heat-seals the end face member 56 along the two side edges 52, 53 of the body member 1 to form the longitudinal seal parts 39. Thus, in the embodiment, the longitudinal sealing device 40 includes three pairs of heat-sealing bars.

[0212] The slitting device 43 seals the body member 1, the body member 2, the side wall member 3 and the end face member 4 along the pair of division edges 29 (the central longitudinal seal part 39) and the body member 1, the body member 2 and the side wall member 3 between the mutually adjacent longitudinal seal parts 39. Thus, in the embodiment, the slitting device 43 includes slitting members at three slitting positions.

[0213] Thus, four bags 5 are manufactured each time the transverse cutting is performed by the transverse cutting device 44. That is, FIG. 15B A modification example of the three-column bag making provides four-column bag making. Each bag 5 does not have a top face part but has a bottom face part (a bottom wall part).

[0214] FIG. 18 A bag making machine partially showing the three-column bag making of the embodiment is illustrated. Two needle hole 22 as first fragile lines are formed on the body member 1 at intervals in the width direction thereof. Two needle hole 25 as second fragile lines are provided as needed depending on the structure of the division device 60 and are formed on the side wall member 3 at intervals in the length direction thereof.

[0215] The division device 60 includes any of the illustrated structures at each position where the side wall member 3 is divided. Further, the division device 60 divides the side wall member 3 (along the two sets of needle hole 25) into three parts to form two sets of one pair of opening edges 31. The two sets of one pair of opening edges 31 are aligned with the needle hole 22 when the body member 1 and the body member 2 are overlapped with each other.

[0216] The first guide device 33 guides the body member 1 to be divided into three parts along the two sets of needle hole 22 and to be bent along the bend line 30 on the side of the two sets of one pair of division edges 29. The first guide device 33 spreads the side wall member 3 at the position of each opening edge 31 by the bending and the temporary seal part 27 of the body member 1 to form two sets of one pair of spread faces 32.

[0217] The end face member supply device 35 supplies two end face members 4 to the body member 1 along with the feeding of the body member 1 and the body member 2, arranges them in the length direction of the body member 1, and overlaps one of the end face members 4 with one pair of the bent portions 34 and one pair of the expanded faces 32, and overlaps the other end face member 4 with the other pair of the bent portions 34 and the other pair of the expanded faces 32. The second guide device 38 guides the body member 1 to be bent along each of the bent lines 30, and folds each of the end face members 4 on both sides with respect to the center line in the length direction thereof by the bending, and further closes each of the expanded faces 32 to form four auxiliary enclosing members 18.

[0218] The both ends of the side enclosing member 3 and the both side edges 52 and 53 of the body member 1 are not limited to the case where they are processed as exemplified in FIG. 18 the drawing, but can be processed arbitrarily according to the design of the bag 5 to be manufactured.

[0219] The subsequent processes are substantially the same as those of the embodiment and thus are omitted. Further, a longitudinal seal portion 39 is formed along either one of the division edge 29 and the both side edges 52 and 53 FIG. 2 FIG. 14 ), so that which edge is opened is arbitrary.

[0220] It is easily understood by those skilled in the art that a multi-row bag making of four or more rows can also be implemented according to the embodiment.

[0221] As is clear from the above, in each of the embodiments, when a multi-row bag making is performed, it is not necessary to supply the side enclosing member to the body member a plurality of times and arrange the plurality of side enclosing members in one row in the width direction of the body member. In this way, the time taken for the supply process of the side enclosing member is shortened, and the manufacturing efficiency of the bag having the end face portion is improved.

[0222] In the multi-row bag making, the formation of the expanded face 32 at the division edge 29 of the body member 1 poses a problem when one side enclosing member 3 is used. However, the embodiment solves the problem by dividing the side enclosing member 3 after temporary fixation and expanding the side enclosing member 3 at the position of the opening edge 31 by the guide to the body member 1 to form the expanded face 32. The body member 1 is not torn along the first fragile line 22 before being guided by the first guide device 33. In this way, the formation of the expanded face 32 is easy and reliable. As a result, the processing quality of the bag 5 to be manufactured is good.

[0223] ​The end face member 4 is supplied to the body member 1 after the formation of the expanded face 32, and overlaps the expanded face 32 of the side wall member 3. In the double row bag of Patent Document 1, the end face member (bottom wall member) is carried on the upper surface of the upper body member before the formation of the expanded face. In this case, at the time of formation of the expanded face, the end face member becomes a resistance, and can interfere with the formation of the expanded face. The embodiment also solves the problem of Patent Document 1.

[0224] In the embodiment, the first fragile line 22 and the second fragile line 25 are not limited to the pinhole, and for example, can be a plurality of micro-joints arranged at appropriate intervals, or a concave line in which the thickness of the material is thinner than the surrounding, and thus is easily torn.

[0225] In addition, the dividing device 60 can also insert a back pad between the body member 2 and the side wall member 3 in the range of the non-attached area 21a of the body member 1, and then irradiate a laser beam from above the side wall member 3 to melt the side wall member 3, thereby dividing the side wall member 3. The back pad is made of a material that does not allow the laser beam to pass through, and prevents the laser beam from reaching the body member 2, thereby preventing the body member 2 from being melted by the laser beam. FIG. 8C

[0226] Hereinafter, further description will be given of the additional modification or the additional structure.

[0227] The method of cutting the continuous side wall member 3 is not limited to shearing. For example, a pinhole can be formed at the cutting position 50, and the side wall member supply device 19 can hold the side wall member 3 on both sides with respect to the pinhole by two clamping members. Then, the side wall member 3 can be torn along the pinhole by separating at least one of the clamping members from the other. FIG. 17A

[0228] The side wall member supply device 19 can include a guide 70 extending in the width direction of the body member 1 and the body member 2, and a carrying unit 71 configured to be movable along the guide 70, as in FIG. 14 FIG. 18 FIG. 17B is a view of the carrying unit 71 as viewed from one side in the width direction of the body member 1 and the body member 2. The carrying unit 71 includes two claws 72, 73, and a slide 74 that holds the claws 72, 73 and is movable along the guide 70.

[0229] The carrying unit 71 can releasably hold the side wall member 3 by bringing the upper claw 72 closer to the lower claw 73, and separating the upper claw 72 from the lower claw 73. FIG. 17A ​​​​the continuous side wall member 3. The carrying unit 71 carries and arranges the side wall member 3 on the body member 2 by moving along the guide 70 while gripping the side wall member 3 with the claws 72, 73. When the carrying of the side wall member 3 is completed, the temporary fixing device 20 temporarily fixes the side wall member 3 to the body member 2 to form a temporary fixing portion 21. FIG. 4B

[0230] The claws 72, 73 can also apply tension from the upstream side of the side wall member 3 when gripping the side wall member 3 to carry the side wall member 3 onto the body member 2. Thereby, vibration of the side wall member 3 at the time of supply of the side wall member 3 is prevented, and the side wall member 3 can be arranged at an accurate position. Then, the carrying unit 71 returns to the standby position.

[0231] The carrying unit 71 moves in the width direction of the body member 1, 2 with respect to the body member 2 and the side wall member 3, and the body member 2 and the side wall member 3 move in the feeding direction Xl with respect to the carrying unit 71. Therefore, the carrying unit 71 can have a substantially spherical cap-shaped curved surface 75 in a downward convex shape at the lower end thereof. Thereby, the carrying unit 71 is prevented from being hooked on the body member 2 or the side wall member 3 or from damaging them.

[0232] As for the timing of the feeding of the body member 1, 2 and the supply of the side wall member 3, for example, the body member feeding start, the body member feeding stop, the side wall member supply, the temporary fixing, and the body member feeding resumption can be repeated. Alternatively, the body member feeding start, the side wall member supply, the body member feeding stop, the temporary fixing, and the body member feeding resumption can be repeated. The latter is advantageous in terms of high-speed bag making.

[0233] In the bag making machine, the body member 1, 2, the side wall member 3, and the end face member 4 (or 56) can be punched by a punch, a thomson knife, or the like (for example, refer to FIG. 20A FIG. 20B FIG. 20C ), and as shown in FIG. 16B FIG. 16C , the bag 5 is provided with a rounded corner portion 47 for preventing injury. The structure is well known.

[0234] The temporary sealing portion 27 (or 51) contributes to the formation of the unfolding face 32 (or 55) as described. The front end portion of the temporary sealing portion 27 can be a triangular shape including two oblique lines 270 and narrowing toward the front end, for example, as shown in FIG. 19 . When the unfolding face 32 is formed, a crease is formed along the two oblique lines 270, and as a result, the obtained unfolding face 32 has a beautiful finish quality. FIG. 16A The oblique line of the auxiliary girth portion 12 of the bag 5 is a crease formed along the oblique line 270.

[0235] FIG. 20A A procedure of cutting a corner is illustrated,​​​​FIG. 20B The area S including the portion cut at an angle is enlarged and shown. As FIG. 20A shown, even if the position 81 of the transverse cut is slightly shifted in the feed direction X1 from the boundary line 80 of the two bags adjacent in the feed direction X1, a sharp angle 83 which can become a cause of injury is generated in one of the bags. Therefore, as FIG. 20B shown, at the time of the transverse cutting by the transverse cutting device 44, a margin 84 extending in the width direction of the body piece 1, the body piece 2 should be generated, and the margin 84 is discarded as dross, and the generation of the angle 83 in the bag is prevented. Further, the margin between the two bags adjacent in the width direction of the body piece 1, the body piece 2 is generated at the time of the slitting by the slitting device 43 as described above, and is discarded as dross. FIG. 20C

[0236] FIG. 21 An example of a pair of temporary seal portions 27 in which the margin 84 is not generated is shown. When the actual division line 85 of the body piece 1 (the position at which the pinhole 22 is actually formed or will be formed) is shifted from the division line 86 in design due to the meandering of the body piece 1 or the like, the division line 85 is shifted from the leading end angle 272 of the temporary seal and crosses the leading end portion of one of the seal portions 27. As a result, it can not be possible to normally form the creases of the development face 32. FIG. 20B

[0237] Further, due to the meandering of the body piece 1, the longitudinal heat seal region 390 is shifted, and when any one of the angles 271 of the temporary seal portion 27 is located outside the longitudinal heat seal region 390, the seal shape is deformed. Likewise, when any one of the angles 271 is located outside the transverse heat seal region 410, the seal shape is also deformed.

[0238] FIG. 22 An example of a pair of temporary seal portions 27 for avoiding the problem is shown. The leading end portion of the temporary seal portion 27 is not a triangular shape but a trapezoidal shape, and is not included in the margin 87 extending in the feed direction X1 formed by the slitting device 43. Thereby, at the time of the formation of the development face 32, accurate creases are formed by the diagonal line 270. The trapezoidal shape leading end portion is completely included in both the longitudinal heat seal region 390 and the transverse heat seal region 410, thereby ensuring a proper seal shape. It is particularly preferable that the intersection of the outer sides of the longitudinal heat seal region 390 and the transverse heat seal region 410 is located on the extension line of the diagonal line 270. In this way, the quality of the bag 5 is improved, and the appearance, the processing quality is beautiful.

[0239] The size of the leading end portion of the temporary seal portion 27 is appropriately decided in accordance with the meandering of the body piece 1, the body piece 2, the precision of the intermittent feed, the width of the margin 84, the margin 87, and the like, so as to satisfy the necessary conditions.​​

Claims

1. A bag-making machine, characterized in that, include: The body component feeding device causes consecutive first body components and consecutive second body components to overlap each other and feed them along the length direction of the first body component and the second body component; as well as A side panel supply device, before the first body panel and the second body panel overlap, positions the side panel on the second body panel in the width direction of the second body panel. When the first body panel and the second body panel overlap, the side panel is positioned between the first body panel and the second body panel, and the side panel is folded in half on both sides relative to the center line of the side panel in the length direction. The bag-making machine also includes: A temporary fixing device that temporarily fixes the side panel to the second body component before the first body component overlaps with the second body component; and The dividing device, after the side panel is temporarily fixed and before the first body panel and the second body panel overlap, divides the side panel to form an opening edge. When the first body panel and the second body panel overlap, the opening edge is aligned with a first vulnerable line of the first body panel, and the opening edge extends in the width direction of the side panel, while the first vulnerable line extends in the length direction of the first body panel. The bag-making machine also includes: A temporary sealing device that, after the first body member and the second body member overlap, seals the side panel to the first body member and the second body member to form a temporary sealing portion; and A first guiding device guides the first body component as it is fed by the first and second body components, dividing the first body component along the first weak line and bending it along a bending line at the dividing edge. The side panel, guided by the first guiding device and the temporary sealing portion, is unfolded at the opening edge to form an unfolded surface. The bending line extends along the length of the first body component. The bag-making machine also includes: An end-face component supply device, as the first body component and the second body component are fed, arranges continuous end-face components on the first body component along the length direction of the first body component and the second body component, and makes the end-face components overlap with the bent portion and the unfolded surface of the first body component. The body portion of the bag is formed using the first body member and the second body member, the side portion of the bag is formed using the side member, and the end portion of the bag is formed using the end member. The temporary fixing device is configured to temporarily fix the side panel to the second body member on both sides relative to the second fragile line, wherein the portion of the side panel including the second fragile line is not attached to the unattached area of ​​the second body member, and the second fragile line is formed on the side panel in such a way that it extends in the width direction of the side panel. The segmentation device includes: Blade; and A moving mechanism moves the blade to a position where, as the second body component is fed, the blade enters the unattached area between the side panel and the second body component. As the blade passes between the side panel and the second body, the moving mechanism causes the blade to move away from the second body and tear the side panel along the second weak line.

2. A bag-making machine, characterized in that, include: The body component feeding device causes consecutive first body components and consecutive second body components to overlap each other and feed them along the length direction of the first body component and the second body component; as well as A side panel supply device, before the first body panel and the second body panel overlap, positions the side panel on the second body panel in the width direction of the second body panel. When the first body panel and the second body panel overlap, the side panel is positioned between the first body panel and the second body panel, and the side panel is folded in half on both sides relative to the center line of the side panel in the length direction. The bag-making machine also includes: A temporary fixing device that temporarily fixes the side panel to the second body component before the first body component overlaps with the second body component; and The dividing device, after the side panel is temporarily fixed and before the first body panel and the second body panel overlap, divides the side panel to form an opening edge. When the first body panel and the second body panel overlap, the opening edge is aligned with a first vulnerable line of the first body panel, and the opening edge extends in the width direction of the side panel, while the first vulnerable line extends in the length direction of the first body panel. The bag-making machine also includes: A temporary sealing device that, after the first body member and the second body member overlap, seals the side panel to the first body member and the second body member to form a temporary sealing portion; and A first guiding device guides the first body component as it is fed by the first and second body components, dividing the first body component along the first weak line and bending it along a bending line at the dividing edge. The side panel, guided by the first guiding device and the temporary sealing portion, is unfolded at the opening edge to form an unfolded surface. The bending line extends along the length of the first body component. The bag-making machine also includes: An end-face component supply device, as the first body component and the second body component are fed, arranges continuous end-face components on the first body component along the length direction of the first body component and the second body component, and makes the end-face components overlap with the bent portion and the unfolded surface of the first body component. The body portion of the bag is formed using the first body member and the second body member, the side portion of the bag is formed using the side member, and the end portion of the bag is formed using the end member. The temporary fixing device is configured to temporarily fix the side panel to the second body member on both sides relative to the second fragile line, wherein the portion of the side panel including the second fragile line is not attached to the unattached area of ​​the second body member, and the second fragile line is formed on the side panel in such a way that it extends in the width direction of the side panel. The cutting device includes blades. The blade is positioned such that its tip enters the unattached area between the side panel and the second body component as the second body component is fed forward. The blade has an inclined edge that extends obliquely away from the second body member in the feed direction. The side panel leaps onto the inclined edge as it is fed together with the second body member, thereby being torn along the second vulnerable line through the inclined edge.

3. A bag-making machine, characterized in that, include: The body component feeding device causes consecutive first body components and consecutive second body components to overlap each other and feed them along the length direction of the first body component and the second body component; as well as A side panel supply device, before the first body panel and the second body panel overlap, positions the side panel on the second body panel in the width direction of the second body panel. When the first body panel and the second body panel overlap, the side panel is positioned between the first body panel and the second body panel, and the side panel is folded in half on both sides relative to the center line of the side panel in the length direction. The bag-making machine also includes: A temporary fixing device that temporarily fixes the side panel to the second body component before the first body component overlaps with the second body component; and The dividing device, after the side panel is temporarily fixed and before the first body panel and the second body panel overlap, divides the side panel to form an opening edge. When the first body panel and the second body panel overlap, the opening edge is aligned with a first vulnerable line of the first body panel, and the opening edge extends in the width direction of the side panel, while the first vulnerable line extends in the length direction of the first body panel. The bag-making machine also includes: A temporary sealing device that, after the first body member and the second body member overlap, seals the side panel to the first body member and the second body member to form a temporary sealing portion; and A first guiding device guides the first body component as it is fed by the first and second body components, dividing the first body component along the first weak line and bending it along a bending line at the dividing edge. The side panel, guided by the first guiding device and the temporary sealing portion, is unfolded at the opening edge to form an unfolded surface. The bending line extends along the length of the first body component. The bag-making machine also includes: An end-face component supply device, as the first body component and the second body component are fed, arranges continuous end-face components on the first body component along the length direction of the first body component and the second body component, and makes the end-face components overlap with the bent portion and the unfolded surface of the first body component. The body portion of the bag is formed using the first body member and the second body member, the side portion of the bag is formed using the side member, and the end portion of the bag is formed using the end member. The temporary fixing device is configured to temporarily fix the side panel to the second body member on both sides relative to the second fragile line, wherein the portion of the side panel including the second fragile line is not attached to the unattached area of ​​the second body member, and the second fragile line is formed on the side panel in such a way that it extends in the width direction of the side panel. The segmentation device includes: Wires; and A support member supports the wire so that, when the side panel is temporarily fixed to the second body member, it passes between the side panel and the second body member in the unattached area. The wire has a portion that enters the feed path of the side panel downstream of the temporary fixing device. The side panel is fed together with the second body member and torn along the second weak line by the wire.

4. The bag-making machine according to claim 3, characterized in that, The segmentation device further includes: The pressing member is configured to press the side panel on both sides relative to the wire when the side panel is torn by the wire along the second weak line.

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