JPH0767928B2 - Device for folding the ears of packaging bags - Google Patents

Description

TECHNICAL FIELD The present invention relates to an ear portion formed at the front and rear ends of a packaging bag,
The present invention relates to a folding device having a simple structure capable of surely bending along the lower surface of the bag body.

BACKGROUND ART A packing bag body packaged by a bag-making filling and packaging machine has ears with a predetermined length formed at the front and rear ends, and both ears are folded along the bottom surface of the packaging bag body. Are known.
As a device for bending the ears of the packaging bag in this manner, there is, for example, a device "bag-making ears bending device" according to Japanese Utility Model Publication No. 57-58085. This device is configured such that a pair of conveyors are arranged so as to be able to continuously run above and below a package manufactured by a horizontal bag-making filling and packaging machine, and the package is transported while being sandwiched by both conveyors. . Spaces are formed in the lower conveyor at predetermined intervals in the traveling direction, and at the timing when the rear ear of the package reaches the space, the push-down member descends to bend the rear ear downward. It is like this. The lower conveyor is set so as to travel at a higher speed than the upper conveyor, so that the rear ear portion facing the space is folded into the bottom surface of the package as the lower conveyor travels. Further, a bite device is arranged on the downstream side of the lower conveyor, and this bite device is tilted upward from the movement track of the front ear before the arrival of the package.
It is configured to tilt downward when the ear reaches the lower side of the bite device. Therefore, the front ear portion is bent downward, and the upper conveyor conveys the package to the bottom of the package.

Similarly, as a device for bending the ears of a packaging bag, there is a device described in the microfilm of Japanese Utility Model Application No. 52-122911 (Japanese Utility Model Application No. 54-52463). The "front and rear edge bending device" according to the present invention includes a push-up member 9 that is raised and lowered from below the endless conveyor 1, and the push-up member 9 has protruding members 10 and 10 on both sides. A structure is employed in which a pair of ear bending guide members 8, 8 are arranged at a predetermined interval above the push-up member 9 facing each other.
When the apparatus is operated, the package 28 conveyed by the endless conveyor 1 is vertically pushed upward by the push-up member 9 at a required timing, and both side projecting members 10 and 10 of the push-up member 9 and the upward direction. The front and rear end ears are bent downward under the cooperation of the ears bending guide members 8 and 8 that face each other. In this device, as a means for folding the rear ear portion of the package 28, a rear ear folding plate 26 that reciprocates horizontally on the ear folding guide members 8 and 8 is provided, and a means for paying out the package 28 is provided. As equipped with a pusher 27. At this time, since the wrapping body 28 has to be paid out after the wrapping body 28 is folded in at the rear ear portion, the rear ear portion folding plate extending horizontally as shown in FIG.
26 is configured so as to project more forward than the pusher 27.

Problems to be Solved by the Invention In the "bag-making ear bending device" according to Japanese Utility Model Publication No. 57-58085 described above, since the package is transferred while being sandwiched by the upper and lower conveyors, the package is filled. When the object to be packaged is a sweet such as a fresh confection, there is a defect that the object to be packaged is deformed or crushed during transportation. Further, since the lower conveyor travels at a higher speed than the upper conveyor, it is pointed out that the lower conveyor moves while rubbing the bottom surface of the package to damage the package. Furthermore, in the case of a spherical object or an unstable product with a small bottom area, even if it is sandwiched by the upper and lower conveyors, the traveling speed of both conveyors is different, and It was often the case that the posture changed and reliable ear folding was not achieved. Further, since the front and rear ears are folded during the transfer of the package, the mechanism is complicated and the manufacturing cost is increased.

In addition, the "front and rear edge folding device" described in Japanese Patent Application No. 52-122911 requires a folding plate that horizontally reciprocates in order to fold the rear ear of the package as described above. A pusher is also provided as a means for paying out the package. However, since these folding plates and pushers perform horizontal reciprocating motion, a time lag is generated by the amount that both members move backward, and there is a demand to operate the bag making filling packaging machine at high speed. It has serious drawbacks that cannot be met.

OBJECT OF THE INVENTION In view of the above-mentioned drawbacks inherent in the above-described ear bending device, the present invention has been proposed to preferably solve this problem, and in particular, it is an easily packaged object such as fresh confectionery. Even if the object to be packaged is not deformed and the high-speed operation of the bag-making filling and packaging machine is not impaired, it is an object of the invention to provide a means having a simple structure capable of surely bending the ears.

Means for Solving the Problems In order to overcome the above-mentioned problems and achieve an intended object, the present invention is capable of moving up and down on the downstream side of a conveyor for introducing a packaging bag body supplied from a bag-making filling and packaging machine. A lifter which is provided and pushes up a holding table on which the body of the packaging bag is placed to a required upper position, and a lifter which is provided at the front and rear ends of the holding table and protrudes by a predetermined height, and is placed on the holding table. A pair of ear-folding members that support the lower surfaces of the front and rear ears of the packaging bag, and the front-and-back ears of the packaging bag that are arranged in parallel above the lifter and are pushed up by the lifter are the ear-folding members. In a device for bending the front and rear ears of a packaging bag body, which is provided with a pair of ears bending guides that fold downwardly in cooperation with, a device disposed above the ears bending guide and pushed up by the lifter. Folded ears An adsorbing device for adsorbing and holding the draped packaging bag in a suspended state, and a plurality of cords arranged so as to circulate horizontally over the lifter at predetermined intervals, and having a vertical portion and a horizontal portion. The packaging bag body is formed in a letter shape, and travels above the ear portion bending guide and below the suction device toward the downstream side, and the tip of the horizontal portion is sucked and held by the suction device. It is characterized in that the rear ear portion is made to contact with the rear ear portion, the rear ear portion is folded along the lower surface of the bag body, and the bag body is scooped and transferred to the downstream side.

Examples Next, the ear-folding device for a packaging bag according to the present invention will be described below with reference to the accompanying drawings with reference to preferred examples. For convenience of description, "front and rear" refers to the front and rear in the transfer direction of the packaging bag. Figure 1 shows
FIG. 1 is a schematic view showing an overall configuration of a folding device 10 according to an embodiment, for example, a horizontal bag-making filling and packaging machine (not shown) is provided with an introduction conveyor 14 downstream of a discharge conveyor 12 and manufactured by a packaging machine. The packaging bag 16 that has been
Is delivered to the introduction conveyor 14. Then, the packaging bag body 16 is supplied to the lifter 18 arranged on the downstream side of the introduction conveyor 14. The wrapping bag body 16 is pre-creased between the body and the front and rear ears 16a and 16b by the folding tools 22 and 22 arranged in the end seal device 20 of the packaging machine.

As shown in FIG. 3 (a), the end seal device 20 includes a pair of vertically facing end sealers 24, 24, and folding tools 22 are provided on both front and rear sides of each end sealer 24. On the facing surface of the folding tool 22,22 facing up and down,
The concave portion 22a and the convex portion 22b are formed correspondingly, and the concave portion
The ears 16a (16b) are fitted with the ears 22a and the protrusions 22b with the ears 16a (16b) of the packaging bag body 16 sandwiched therebetween. As a result, the ears 16a, 16b can be bent surely and neatly along the folding habit. A lifter 18 that pushes up the packaging bag body 16 by a predetermined height is disposed on the downstream side of the introduction conveyor 14, and the packaging bag body 16 is placed on the lifter 18.
Are supplied with the ears 16a, 16b aligned in the front and rear of the transfer direction (see FIG. 3 (b)). This lifter 18
Is basically composed of a support base 26 on which the packaging bag body 16 is placed, an elevating bar 28 vertically provided on the bottom of the support base 26, and an elevating mechanism 30 connected to the elevating bar 28. The support base 26 is a holding base on which the body of the packaging bag 16 is placed, as shown in FIG.
32, and a pair of ear-folding members 34, 34 arranged at both front and rear ends of the holding base 32, and the dimension of the holding base 32 in the direction intersecting the transfer direction is set shorter than the dimension of the folding member 34. Has been done. Further, the upper end of the ear part folding member 34 protrudes above the mounting surface of the holding base 32, and the upper end of the folding member 34 in a state where the body part of the packaging bag body 16 is mounted on the holding base 32. It is configured to come into contact with the lower surface between the body and the ear 16a (16b) (see FIG. 3 (c)).

Below the support table 26, a lifting bar 28 is mounted on a base frame (not shown).
A support plate 36 that extends in parallel with the support plate 36 is provided, and a pair of guide rollers that sandwich the elevating bar 28 in a left-right relationship are provided on the support plate 36.
Two sets of 38, 38 are vertically arranged at a predetermined distance from each other, and the elevating bar 28 is vertically moved by being guided by four guide rollers 38. As shown in FIG. 2, long grooves 28a are formed along the longitudinal direction on both side surfaces of the elevating bar 28 facing the guide rollers 38, and the guide rollers 38 are slidably fitted in the long grooves 28a. I am fit. Near the lower end of the lifting bar 28,
As shown in FIG. 1, the upper end of a rod 40 that constitutes the lifting mechanism 30 is rotatably supported. Further, below the support plate 36, an arm 44, which is rotatably supported at one end in the longitudinal direction by a pin 42 projecting from the base frame, is provided, and the other end of the arm 44 is provided with an arm 44. The lower end is rotatably supported.
The rod 40 is composed of a turnbuckle whose length can be varied, and is configured so that the height of the support base 26 can be adjusted appropriately.

As shown in FIG. 1, a front cam 46 is rotatably disposed in the vicinity of the arm 44, and a cam groove of the illustrated shape provided on the cam 46 is provided.
A cam follower 48 pivotally supported by the arm 44 slidably faces 46a. The front cam 46 is connected to a drive motor 51 via a connecting means 50 such as a chain-sprocket. Therefore, by rotationally driving the drive motor 51 in a predetermined direction, the arm 44 engaging with the front cam 46 swings, whereby the support base 26 moves up and down (FIG. 3 (c),
(See (d)). A servomotor is preferably used as the drive motor 51, and a product detection sensor 52 described later is used.
It is driven intermittently by a control command based on the product detection of.

At the position where the lifter 18 is arranged, as shown in FIG.
A pair of mounting bases 53, 53 having a shape are arranged to face each other in a direction intersecting the transfer direction with the support base 26 interposed therebetween. The upper surface level of the horizontal portion 53a of the mounting table 53 is set to substantially match the upper end level of the ear folding member 34. In addition, both mounting tables 53, 53 are the support table 26 (holding table 3
They are arranged apart from each other by a length that allows the lifting and lowering of 2). That is, as shown in FIG. 3 (b), the packaging bag 16 transferred by the introduction conveyor 14 is first placed on the loading table 5 as shown in FIG.
It is mounted on 3,53 and is configured to wait for the lifter 18 to push it up. Then, when the lifter 18 rises, as shown in FIG. 3 (c), the body of the packaging bag 16 is placed on the holding table 32 of the supporting table 26, and the upper ends of the binaural folding members 34, 34 are lifted. , So as to contact the lower surfaces of the corresponding ears 16a, 16b.

Stopper at a position sandwiching the introduction conveyor 14 and the lifter 18
54 is provided, and the stopper 54 functions so that the front end of the front ear portion 16a of the packaging bag 16 transferred by the introduction conveyor 14 is brought into contact with the stopper 54 to stop and position the packaging bag 16. As shown in FIG. 1, the stopper 54 is provided with a product detection sensor 52 formed of, for example, a photoelectric tube, and the sensor 52 is configured to detect the front ear portion 16a of the packaging bag body 16. Then, the drive motor 51 is started based on the product detection of the detection sensor 52.

As shown in FIG. 1, above the lifter 18, a pair of ear bending guides 55, 55 are arranged in parallel with each other at a distance that allows the support table 26 to pass in the transfer direction of the packaging bag body 16. It is set up. As shown in FIGS. 3 (c) and 3 (d), the folding guides 55, 55 cooperate with the ear folding members 34, 34 of the lifter 18 so that the front and rear ears of the packaging bag body 16 can be prevented. It functions to bend 16a, 16b downward. Also,
The folding guide 55 located on the front side of the attachment 56 in the transfer direction also has a function of folding the front ear portion 16a of the packaging bag body 16 along the bottom surface. As shown in FIG. 2, the ear bending guide 55 has notches at the upper portions in the vicinity of both ends in the longitudinal direction over a predetermined length, and the notches 55 a allow the attachment 56 to pass upward. Function.

A suction device 57 having a suction surface directed downward is disposed above the ear bending guides 55, 55, and the packaging bag body pushed up by the lifter 18 as shown in FIG. 3 (d).
It is configured to hold the upper surface of 16 by suction. The suction force of the suction device 57 is the same as that of the packaging bag even if the lifter 18 is lowered.
Although the 16 is held without dropping, the transfer of the packaging bag body 16 by the attachment 56 is set to an allowable value.

A transfer conveyor 58 for the packaging bag body 16 is disposed above the edge bending guide 55. This transfer conveyor 58
Is a pair of sprockets 59, 59 arranged at a predetermined interval in a direction parallel to the traveling direction of the introduction conveyor 14, and an endless chain 60 wound between both sprockets 59, 59,
It is composed of attachments 56 arranged at predetermined intervals in the traveling direction of the endless chain 60. The transfer conveyor 58
Another sprocket 61 is coaxially arranged on the upstream side sprocket 59 in the above so as to be integrally rotatable. A sprocket 63 connected to the front cam 46 via a power transmission means 62 such as a gear is rotatably disposed adjacent to the front cam 46, and the sprocket 63 and the sprocket 61 are connected to each other. A chain 64 is wound between them. That is, the transfer conveyor 58 is driven by the drive motor 51 that drives the lifter 18 up and down. Although the attachment 56 is moved by a sprocket-chain in the embodiment, it may be moved by, for example, a pulley and a belt or a wire.

As shown in FIG. 2, the attachment 56 is formed in an L-shape on the side surface, and has a substantially central cutout in an L-shape so that it can move above the ear bending guide 55 without interfering with it. It is configured to do. Further, the cutout portion 56a functions to allow the label 65 to be attached to the bottom surface of the packaging bag body 16 when the label 65 to be described later is attached. As shown in the drawing, the attachment 56
On the rear surface side of the vertical portion 56b, a connecting rod 66 extending in a direction intersecting the transfer direction is arranged, and a projecting end portion of the connecting rod 66 is connected to the endless chain 60. That is, the attachment 56 can be moved below the suction device 57 without the endless chain 60 interfering with the suction device 56. As shown in FIG. 3 (e), the attachment 56 has the suction device 57 on the horizontal portion 56c thereof.
In a state where the packaging bag body 16 suction-held by the above is scooped, the packaging bag body 16 is transferred to a discharge conveyor 67 described later and the horizontal portion 56c
The front end of the bag contacts the rear ear portion 16b of the packaging bag body 16 and functions to fold it along the bottom surface of the bag body 16.

As shown in FIG. 2, the attachment 56 is provided on the downstream side in the transfer direction from the position where the ear bending guides 55, 55 are arranged.
A pair of side guide members 68, 68 for regulating the position of both side surfaces (both side surfaces in the direction intersecting the transfer direction) of the packaging bag body 16 transferred by the above are arranged at a predetermined interval. Further, a bottom guide member 69 is disposed at a position corresponding to the notch 56a of the attachment 56 in the middle of the both side guide members 68, 68, and is folded into the bottom guide member 69 on the bottom surface side of the packaging bag body 16. The separated front ear portion 16a is configured to be in sliding contact. Both guide members 68, 69 are arranged parallel to the transfer conveyor 58 up to the vicinity of the discharge conveyor 67 described later. As shown in FIG. 1, the attachment 56 is provided above the bottom guide member 69.
The upper guide member 79 for preventing the packaging bag body 16 transferred by the above from floating upward extends in parallel with the bottom guide member 69.

A packaging bag body is provided at an appropriate position on the downstream side of the bottom guide member 69.
A label sticking device 70 for sticking the label 65 to the bottom surface of the 16 is provided. That is, as shown in FIG. 1, a roll body 72 formed by winding a long strip 71 with a predetermined diameter is rotatably arranged below the bottom guide member 69. Labels 65 for attaching the ears 16a, 16b to the bag body 16 are detachably attached at predetermined intervals. Further, the strip 71 pulled out from the roll body 72 is wound around the winding roller 74 via the plurality of guide rollers 73. The strip 71 guided by the guide roller 73 is a packaging bag that is transferred by the attachment 56 while the strip 71 is being pulled out.
The label 65 peeled off from the band 71 so as to face the movement trajectory of the bottom surface of the packaging body 16 is attached to the bottom surface of the packaging bag body 16. The bottom guide member 69 is not provided at the label sticking position so that sticking of the label 65 is not hindered.

Also, the packaging bag body to be transferred to the downstream side of the label sticking position.
A sticking roller 75 that comes into contact with the bottom surface of 16 is rotatably arranged. Further, a pressing device 77 having an elastic belt 76 made of, for example, sponge movably arranged is arranged above the label attaching position. That is, when attaching the label 65 to the packaging bag body 16, as shown in FIG.
Is clamped by the pressing device 77 and the sticking roller 75,
A reliable application of the label 65 can be achieved.

As shown in FIG. 1, a discharge conveyor 67 and a discharge chute 78 are arranged further downstream of the sticking roller 75. Then, the packaging bag body 16 as shown in FIG. 4, which is transported by the attachment 56, and in which the ears 16a, 16b are bent and the label 65 is attached during the transportation, has the discharge conveyor 67 and the discharge chute 78. It is configured to be passed to a subsequent process via

Operation of Embodiment Next, the operation of the folding device according to the above-described embodiment will be described. The packaging bag body 16 in which the objects to be packaged are filled by the horizontal bag-making filling and packaging machine is the third bag when the end seal is applied.
As shown in FIG. 7A, a folding crease is attached between the body and the ears 16a, 16b via folding crease tools 22, 22 arranged in the end seal device 20. The packaging bag body 16 is transferred to the introduction conveyor 14 via the discharge conveyor 12 of the packaging machine, and is further supplied to the lifter 18 by the introduction conveyor 14. As shown in FIG. 3B, the packaging bag 16 supplied by the introduction conveyor 14 is transferred to the mounting tables 53, 53, and the tip of the front side ear portion 16a thereof contacts the stopper 54. Stop is positioned. At this time, the product detection sensor 52 provided on the stopper 54 detects the arrival of the packaging bag body 16 at the appropriate position of the lifter 18.

Upon detection of the product by the product detection sensor 52, the drive motor 51 starts operation and rotates the front cam 46.
The rotation of the front cam 46 causes the arm 44, which is engaged via the cam follower 48, to swing about the pin 42 as a fulcrum, whereby the elevating bar 28 rises while being guided by the plurality of guide rollers 38. At this time, the body portion of the packaging bag body 16 is placed and supported on the holding base 32 of the support base 28, and the pair of ear portion folding members 34, 3 are provided.
The tip of 4 contacts the front and rear ears 16a, 16b of the packaging bag body 16 from the lower surface.

Then, the front and rear ears 16a, 16b of the packaging bag body 16 supported and pushed up by the support base 26 have their upper surfaces on the pair of ears bending guides 55, 55 as shown in FIG. 3 (c). It abuts and is prevented from moving upward. Also, the ear 16a (1
Since the tip of the ear-folding member 34 is in contact with the lower surface between the body portion of 6b), the ear 16a (16b) is bent vertically downward along the crease.

As described above, the packaging bag body 1 in which both ears 16a and 16b are bent
6 is further pushed upward, and the upper surface is suction-held by the suction device 57 as shown in FIG. 3 (d). At this time, the ears 16a, 16b of the packaging bag body 16 are restricted from returning to their original positions by contacting the vicinity of their lower ends with the corresponding bending guides 55. Next, the attachment 56 of the transfer conveyor 58, which is intermittently driven by the same drive motor 51 as the lifter 18, is timed at the timing at which the support base 26 descends, as shown in FIG. 3 (e). The body 16 reaches the drooping position.

As described above, since the attachment 56 is L-shaped, the tip of the horizontal portion 56c contacts the bent rear ear portion 16b of the packaging bag body 16 and is folded along the bottom surface of the bag body 16. . Further, the packaging bag body 16 sucked and held by the suction device 57 is transferred while being scooped by the horizontal portion 56c of the attachment 56. At this time, as shown in FIG. 3 (e), the front side ear portion 16a of the packaging bag body 16 has the ear portion bending guide 5
Since the forward movement is blocked by 5, attachment 56
The front ear portion 16a is folded along the bottom surface of the bag body 16 with the movement of the.

The packaging bag body 16 in which the both ears 16a, 16b are folded is a side guide member 68, 6 disposed on the downstream side of the ear bending guide 55.
8, and is guided and guided by the bottom guide member 69 and the upper guide member 79. Then, when the packaging bag body 16 arrives above the arrangement position of the label sticking device 70, the label 65 peeled off from the band body 71 as shown in FIG.
The front and rear ears 16a, 16 folded into the bottom of the packaging bag body 16.
Commonly attached to b. At this time, the packaging bag 16
Moves while being held by the pressing device 77 and the sticking roller 75, so that the label 65 can be surely stuck to the bottom surface of the packaging bag body 16. The label 65 is adapted to be attached to the bottom surface of the bag body corresponding to the cutout portion 56a formed in the attachment 56.

As shown in FIG. 4, the packaging bag body 16 in which both ears 16a and 16b are attached to the bottom surface via the label 65 has the discharging conveyor 67 and the discharging chute as shown in FIG. 3 (g). 78
After that, it is discharged toward the next process.

EFFECTS OF THE INVENTION As described above, according to the ears bending device for a packaging bag according to the present invention, the ears are bent while the packaging bag is suction-held by the suction device. Even if it is easily deformed, the object to be packaged is not deformed or crushed. Moreover, in order to fold the rear ear of the packaging bag, the tip of the horizontal portion of the attachment that continuously runs in the feeding direction of the bag is brought into contact with the folded rear ear of the packaging bag sucked and held by the suction device. The attachment is also performed by bringing them into contact with each other, and the transfer of the bag body to the downstream side is also performed by the attachment. Therefore, as compared with the conventional device that horizontally reciprocates the folding plate and the pusher, there is no time lag in which both members return to the rear, and there is a great advantage that the bag making and filling machine can achieve high-speed operation. ing.

Further, by providing the end seal device of the packaging machine with a folding tool and preliminarily folding the ears of the packaging bag with the tool, the ears can be bent surely and neatly along the folding habit. Further, since the label sticking device for sticking a label to the lower surface of the packaging bag body is provided while the packaging bag body is being transferred by the attachment, it is stable when both ears are folded into the lower surface of the bag body. Labeling can be achieved. Moreover, since the label sticking device is disposed in the middle of the attachment transfer path, the installation space can be effectively used. In addition, since the lifter and the rope are driven intermittently by the servomotor, there is a beneficial effect such that accurate start / stop control is possible even at high speed.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of an ear-folding device for a packaging bag according to an embodiment, FIG. 2 is a schematic perspective view of main parts showing a disposition portion of a lifter and an ear-folding guide, and FIG. ) ~
(G) is explanatory drawing which shows the process of bending the ear | edge part of a packaging bag body by the ear | folding apparatus over time, FIG. 4 is a bottom view of the packaging bag body by which the ear | folder was bent by the folding apparatus which concerns on an Example. It is a schematic perspective view observed from the side. 10 …… Bending device, 14 …… Introduction conveyor 16 …… Packing bag, 16a …… Front ears 16b …… Rear ears, 18 …… Lifter 22 …… Folding tool 32 …… Holder 34 …… Ears Part folding member 55 …… Ear bending guide 56 …… Attachment, 57 …… Suction device 60 …… Cable (endless chain) 65 …… Label, 70 …… Labeling device

Continuation of the front page (56) References JP-A-52-128782 (JP, A) Actually opened 54-52463 (JP, U) Actually opened 57-58085 (JP, Y2)

Claims (5)

[Claims] 1. A packaging bag body (16) supplied from a bag-making filling and packaging machine is arranged downstream of a conveyor (14) into which the packaging bag body (16) is introduced so that the packaging bag body (16) can be moved up and down. Lifter (18) that pushes up the holding table (32) to be placed to the required upper position
And the lower surfaces of the front and rear ears (16a, 16b) of the packaging bag body (16) disposed on the front and rear ends of the holding table (32) and projecting by a predetermined height. The pair of ear-folding members (34, 34) for supporting and the front and rear ears of the packaging bag body (16) arranged in parallel above the lifter (18) and pushed up by the lifter (18) are described above. Ear folding member (3
A device for folding the front and rear ears of a packaging bag body (16), which comprises a pair of ears folding guides (55, 55) that fold downwardly in cooperation with the ears folding guide (55). , 55),
It is pushed up by the lifter (18) so that both ears (16a,
A suction device (57) for adsorbing and holding the packaging bag body (16) in which the 16b) is bent is held in a hanging state, and a rope body (60) arranged so as to horizontally circulate above the lifter (18). Many are provided at intervals,
It is formed in an L-shape having a vertical portion (56b) and a horizontal portion (56c), and travels above the selvage bending guides (55, 55) and below the suction device (57) toward the downstream side. , The front end of the horizontal portion (56c) is brought into contact with the folded rear ear portion (16b) of the packaging bag body (16) sucked and held by the suction device (57), whereby the rear ear portion (16b) ) Is folded along the lower surface of the bag body and an attachment for transporting the bag body (16) to the downstream side while scooping the bag body (16) is provided. 2. A front ear portion (16a) of the packaging bag body (16).
Is in contact with one of the ear bending guides (55) while the bag body (16) is adsorbed and held by the adsorbing device (57), and is accompanied by running of the attachment (56) to the downstream side. 2. The device for bending an ear portion of a packaging bag body according to claim 1, wherein the front ear portion (16a) is folded along the lower surface of the bag body. 3. The packaging bag body (16) through a folding tool (22, 22) arranged in an end seal device (20) of the packaging machine.
The device for bending an ear portion of a packaging bag body according to claim 1, wherein a crease is preliminarily provided between the body portion and the ear portion (16a, 16b). 4. The label (6) is attached to both ears (16a, 16b) bent to the lower surface of the packaging bag (16) while the packaging bag (16) is being transferred by the attachment (56).
The device for folding the ears of a packaging bag according to claim 1, further comprising a label sticking device (70) for sticking 5) in common. 5. The lifter (18) and the rope (60) are configured to be intermittently driven by a servomotor (51), and the servomotor (51) is placed at a predetermined position of the lifter (18) in a packaging bag body ( The device for bending an ear portion of a packaging bag body according to claim 1, which is operation-controlled by a detection means (52) for detecting the arrival of 16).