JPH0418217A - Ear-folding device of packing bag - Google Patents

Abstract

PURPOSE:To securely fold the ear part without deforming of articles to be packed, by folding the font side ear of a packing bag along the lower face of the bag body through the folding guide of the ear at the front side of transfer direction on the way transferred by attachments. CONSTITUTION:The ears 16a, 16b at the front and back of a packing bag 16 supported and lifted up by an upholding base 26 contact a couple of ear-folding guides 55, 55 at the upper face to the prevented from upward moving. And since the front edge of the ear-folding member 34 contacts the lower face between the ears 16a, 16b and the shell, the ears 16a, 16b are bent vertically downward along a folding crease. The packing bag 16 bent at the ears 16a, 16b is raised further to be adsorbed and kept at the upper face by an adsorber 57. At this time, the ears 16a, 16b of the packing bag 16 contact the corresponding folding guide 55 at the near position of the lower edge to prevent from recovering the original form.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] This invention relates to ear parts formed at the front and rear ends of a packaging bag.
The present invention relates to a folding device having a simple configuration that can reliably fold the bag along the lower surface thereof.

The front and rear ends of a packaging bag packaged using a conventional form-fill-seal machine are formed with ears of a predetermined length, and both ears are folded in along the bottom of the packaging bag. Are known.

As a device for folding the ears of a packaging bag in this way, for example, the device "!ll
! There is a bag-edge bending device.

The device is configured such that a pair of conveyors are disposed so as to be able to run continuously above and below a package manufactured by a horizontal form-fill-seal machine, and the package is transferred while being held between both conveyors. . In addition, spaces are formed in the lower conveyor at predetermined intervals in the running direction, and at the timing when the rear ear of the package reaches the space, the push-down member descends and bends the rear ear downward. It looks like this. The lower conveyor is set to run at a higher speed than the upper conveyor, so that the rear ears facing the space are folded into the bottom surface of the package as the lower conveyor runs.

Furthermore, a gripping device is disposed downstream of the lower conveyor, and this gripping device is tilted upward from the movement trajectory of the front ear before the package arrives, so that the gripping device It is configured to tilt downward at the timing when it reaches the lower side. Therefore, the front ears are bent downward and folded into the bottom surface of the package as the package is continuously transported by the upper conveyor.

Problems to be Solved by the Invention In the above-described folding device, the package is conveyed while being held between the upper and lower conveyors. There are drawbacks such as the packaged items being deformed or crushed during transportation. Furthermore, since the lower conveyor runs faster than the upper conveyor, the lower conveyor rubs the bottom surface of the package as it moves.

The disadvantage of damaging the package is also pointed out.

Furthermore, if the packaged item is a spherical item or an unstable product with a small base area, even if the item is held between the upper and lower conveyors, the traveling speed of both conveyors is different, so the packaging may be unstable during transport. It was often the case that a reliable ear fold could not be achieved due to changes in posture. Furthermore, since the front and rear ears are folded in during transport of the package, problems such as a complicated mechanism and increased manufacturing costs have been pointed out.

Purpose of the Invention The present invention has been proposed in view of the drawbacks inherent in the above-mentioned ear folding device, and has been proposed to suitably solve this problem, and is particularly suitable for wrapping easily deformable items such as fresh sweets. It is an object of the present invention to provide a means with a simple structure that can reliably bend the ears without deforming the packaged object.

Means for Solving Problem A1 In order to overcome the above-mentioned problems and achieve the intended purpose, the present invention provides an apparatus for folding the front and rear edges of a packaging bag body that is made, filled and packaged. A conveyor that introduces the packaging bags supplied from the machine; and a holding table that is movable up and down downstream of the introduction conveyor and on which the bodies of the packaging bags supplied by the conveyor are placed is moved upward as required. a lifter disposed at the front and rear ends of the holding stand, protruding from the upper surface of the holding stand by a predetermined height, and lifting the packaging bag placed on the holding stand by a predetermined dimension inside from the front and rear ends; A pair of ear folding members that support the lower surface of the ear.

The front and rear ears of the packaging bag are arranged in parallel above the lifter with an interval that allows passage of the holding table in the front and back direction, and are pushed up by the lifter.

a pair of ear folding guides that are bent downward in cooperation with the ear folding member; and a packaging bag that is disposed above the ear folding guides and has both ears folded when pushed up by the lifter. A suction device that sucks and holds the body in a hanging state, and a suction device that is arranged at predetermined intervals on a cable that circulates above the lifter, and that attaches the rear ear part of the packaging bag held by the suction device to the cable that circulates above the lifter. an attachment that folds the packaging bag along the lower surface and transfers the packaging bag while scooping it up; It is characterized in that it is configured to be folded along the lower surface of the bag via a guide.

Embodiment Next, a preferred embodiment of the device for folding the edges of a packaging bag according to the present invention will be described below with reference to the accompanying drawings. For convenience of explanation, "after rii" refers to the front and rear of the packaging bag in the transport direction.

FIG. 1 shows a folding device according to an embodiment! 10 is a schematic diagram showing the overall configuration of a packaging bag body 16 manufactured by the packaging machine, in which an introduction conveyor 14 is disposed downstream of a discharge conveyor 12 in, for example, a horizontal bag-forming-fill-sealing machine (not shown).
Then, the feed is passed from the discharge conveyor 12 to the inlet conveyor 14. The packaging bag 16 is then supplied to a lifter 18 disposed downstream of the introduction conveyor 14. Note that the packaging bag body 16 is preliminarily applied with a folding force between the body and the front and rear ears 16a and 16b by a folding tool 22.22 disposed in the end sealing device 20 of the packaging machine. Can be attached.

That is, as shown in FIG. 3(a), the end seal device 20 includes a pair of end sealers 24, 24 facing each other vertically.
Folding tools 22 are provided on both the front and rear sides of each end sealer 24. Concave portions 22a and convex portions 22b are formed correspondingly on the opposing surfaces of the vertically opposing folding tools 22.22. By fitting the ear portions 16a (16b) with each other, the ear portions 16a (16b) are bent. Thereby, the ears 16a, 16b can be folded reliably and neatly along the folding curves.

A lifter 18 for pushing up the packaging bag 16 by a predetermined height is provided on the downstream side of the introduction conveyor 14, and the lifter 18 is provided with a lifter 18 that allows the packaging bag 16 to be moved forward and backward in the transport direction with ear portions 1.
6 a and l 6 b are aligned (see FIG. 3(b)).
It basically consists of a support base 26 on which is placed, a lift bar 28 vertically disposed at the bottom of the support base 26, and a lift mechanism 30 connected to the lift bar 28. The support stand 26 is the second
As shown in the figure, it consists of a holding stand 32 on which the body of the packaging bag 16 is placed, and a pair of ear folding members 34 and 34 disposed at both front and rear ends of the holding stand 32. The dimension in the direction intersecting the transport direction is set shorter than the dimension of the folding member 34. In addition, the ear folding member 3
The upper end of 4 protrudes above the mounting surface of the holding table 32,
With the body of the packaging bag 16 placed on the holding table 32, the upper end of the folding member 34 is placed between the body and the ears 16a (16
b) is configured to abut on the lower surface between
(See Figure CQ).

Below the support stand 26, a support plate 36 extending parallel to the lift bar 28 is disposed on a base frame (not shown). Two sets of guide rollers 38, 38 are arranged vertically and spaced apart by a predetermined distance, and the elevating bar 28 is guided by the four guide rollers 38 and vertically moves up and down. In addition, as shown in FIG. 2, long grooves 28a are formed along the longitudinal direction on both sides of the lifting bar 28 facing the guide rollers 38, and the guide rollers 38 can freely slide in these long grooves 28a. is fitted.

Near the lower end of the lift bar 28, as shown in FIG. 1, the upper end of a rod 40 constituting the lift mechanism 30 is rotatably supported. Further, an arm 44 is disposed below the support plate 36 and has one longitudinal end rotatably supported by a pin 42 protruding from the base frame. The lower end is rotatably supported. In addition, the rod 40 is comprised of a turnbuckle whose length dimension is variable, and is configured so that the height of the support base 26 can be adjusted as appropriate.

As shown in FIG.
A cam follower 4 pivotally supported on the arm 44 is rotatably disposed in the cam groove 46a of the illustrated shape provided in the cam 46.
8 is sliding freely.

This front cam 46 is connected to a drive motor 51 via a linking means 50 such as a chain sprocket. Therefore, by rotationally driving the drive motor 51 in a predetermined direction, the arm 44 that engages with the front cam 46 swings, thereby moving the support base 26 up and down (Fig. 3(c), (
d)), as the drive motor 51, a servo motor is preferably used, and the product detection sensor 5 described later
It is intermittently driven by a control command based on product detection in step 2.

As shown in FIG. 2, the lifter 18 is located at the location shown in FIG.
A pair of U-shaped mounting tables 53, 53 are disposed opposite to each other in a direction intersecting the transfer direction with the support table 26 in between. The upper surface level of the horizontal portion 53 a of the mounting table 53 is set to substantially match the upper end level of the ear folding member 34 . Further, the mounting tables 53, 53 are spaced apart by a length that allows the support table 26 (holding table 32) to move up and down. That is, the introduction conveyor 14
As shown in FIG. 3(b), the packaging bag 16 transferred by is first placed on both mounting tables 53, 53, and is configured to wait for being pushed up by the lifter 18. Then, when the lifter 18 rises.

As shown in FIG. 3(c), the body of the packaging bag 16 is placed on the holding base 32 of the support base 26, and the upper ends of both ear folding members 34 and 34 are attached to the corresponding ears 16a. , 16
It comes into contact with the lower surface of b.

A stopper 54 is disposed at a position sandwiching the introduction conveyor 14 and the lifter 18.

The tips of the front ears 16a of the packaging bag 16 transferred by the introduction conveyor 14 come into contact with each other, and the packaging bag 16
It functions to perform stop positioning. This stopper 54 has a first stopper as shown in FIG.

For example, a product detection sensor 52 made of a phototube is provided,
The sensor 52 is configured to detect the front ear portion 16a of the packaging bag 16. Then, based on the product detection by the detection sensor 52, the drive motor 51 is started.

Above the lifter 18, as shown in FIG. 1, a pair of ear bending guides 55, 55 are spaced apart by a distance that allows the support base 26 to pass in the transport direction of the packaging bag 16.
are arranged in parallel. This bending guide 55,5
5, as shown in FIGS. 3(Q) and (d), under the cooperative action of the ear folding members 34 and 34 of the lifter 18,
It functions to bend the front and rear ears 16a, 16b of the packaging bag 16 downward. Further, the bending guide 55 located on the front side in the transport direction of the attachment 56 described later also has the function of folding the front ear portion 16a of the packaging bag 16 along the bottom surface. As shown in FIG. 2, the ear bending guide 55 has a notch over a predetermined length at the upper part near both ends in the longitudinal direction, and the a notch 55a is designed to allow the attachment 56 to pass above. Function.

Above the ear bending guides 55.55, a suction device i57 with the suction surface directed downward is arranged, as shown in FIG.
cl), it is configured to suction and hold the upper surface of the packaging bag 16 pushed up by the lifter 18. In addition, the adsorption device! The adsorption force of 57 is the same as that of lifter 18.
Even if the attachment 56 is lowered, the packaging bag 16 is held without falling, but the attachment 56 is set to a value that allows the packaging bag 16 to be transferred.

Further, above the ear portion bending guide 55, a packaging bag body 16 is provided.
A transfer conveyor 58 is provided.

This transfer conveyor 58 includes a pair of sprockets 59,59 and a pair of sprockets 59,591 arranged at a predetermined distance in a direction parallel to the running direction of the introduction conveyor 14.
It consists of an endless chino 60 wrapped around i[1, and attachments 56 arranged at predetermined intervals in the running direction of the endless chino 60.

Upstream sprocket 59 in the transfer conveyor 58
Another sprocket 61 is coaxially arranged so as to be rotatable therein. A sprocket 63 is rotatably provided adjacent to the front cam 46 and is connected to the front cam 46 via a power transmission means 62 such as a gear. A cheno 64 is wrapped between them. That is, the transfer conveyor 58 is driven by a drive motor 51 that drives the lifter 18 up and down.

In the embodiment, the attachment 56 is configured to be moved by a sprocket chain, but it may be moved by, for example, a pulley, 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 an L-shape notch at approximately the center, so that it can move above the ear bending guide 55 without interfering with it. It is configured so that it can be done.

Further, the notch 56a functions to allow the tii label 65 to be attached to the bottom surface of the packaging bag 16 when attaching the label 65, which will be described later. As shown in FIG. 1, a connecting rod 66 extending in a direction intersecting the transfer direction is provided on the rear side of the vertical portion 56b of the attachment 56, and the protruding end of this connecting rod 66 connects to the endless chino 60. is connected to. That is, the configuration is such that the attachment 56 can be moved below the suction device 57 without the endless chino 60 interfering with the suction device 56.

The attachment 56, as shown in FIG. 3(e),
The packaging bag 16 suctioned and held by the suction device 157 is scooped onto the horizontal portion 56c and transferred to a discharge conveyor 67, which will be described later.

The tip of the horizontal portion 56c is connected to the rear ear portion 16b of the packaging bag 16.
The bag body 16 functions to come into contact with the bag body 16 and fold it along the bottom surface of the bag body 16.

As shown in FIG. 2, on the downstream side in the transfer direction from the arrangement position of the ear portion bending guides 55, 55, both sides of the packaging bag 16 transferred by the attachment 56 (both sides in the direction intersecting the transfer direction) are provided. A pair of side guide members 68, 68 are arranged with a predetermined distance between them. In addition, a bottom guide member 69 is disposed between the two measuring part guide members 68, 68 at a position corresponding to the notch 56a of the attachment 56, and a bottom guide member 69 is provided on the bottom side of the packaging bag 16. The two guide members 68 and 69, which are configured so that the folded front ears 16a come into sliding contact with each other, are arranged parallel to the transfer conveyor 58 up to the vicinity of a discharge conveyor 67, which will be described later. Note that, as shown in FIG. 1, above the bottom guide member 69.

Packaging bag 16 transferred by the attachment 56
An upper guide member 79 that prevents the
It extends parallel to the bottom guide member 69.

A label sticking device f70 for sticking a label 65 on the bottom surface of the packaging bag 16 is disposed at an appropriate position on the downstream side of the bottom guide member 69. That is, as shown in FIG. 1, a roll body 72 in which a long band 71 is wound with a predetermined diameter is rotatably disposed below the bottom guide member 69.
Labels 65 for attaching the ears 16 a and l 6 b of the packaging bag 16 to the bag 16 are removably attached to the bag 1 at predetermined intervals.

Moreover, the band body 71 pulled out from the roll body 72 is as follows.

The paper is wound onto a winding roller 74 via a plurality of guide rollers 73. Then, the band 71 guided by the guide roller 73 faces the movement trajectory of the bottom surface of the packaging bag 16 transferred by the attachment 56 while being pulled out, and wraps the label 65 peeled from the band 71. It is configured to be attached to the bottom surface of the bag body 16. Note that the bottom guide member 69 is not provided at the label attachment position, so that it does not interfere with the attachment of the label 65.

Further, on the downstream side of the label sticking position, a sticking roller 75 that comes into contact with the bottom surface of the packaging bag 16 being transferred is rotatably disposed. Furthermore, above the label sticking position, a presser device 77 is disposed, in which an elastic belt 76 made of, for example, sponge is movably disposed. That is, when attaching the label 65 to the packaging bag 16, as shown in FIG. A good adhesion can be achieved.

Further downstream of the pasting roller 75, as shown in FIG. 1, a discharge conveyor 67 and a discharge chute 78 are provided. Then, the packaging bag 16 as shown in FIG. 4 is transferred by the attachment 56, and the ears 16a and 16b are bent and the label 65 is attached during the transfer. 78 to the subsequent process.

Function of the Embodiment Next, the function of the folding device according to the embodiment described above will be explained.

The packaging bag body 16 filled with the object to be packaged by the horizontal bag-forming-fill-sealing machine is subjected to an end seal as shown in FIG. 3(a).
As shown in FIG. 2, the body portion and the ears 16a, 16b are creased at the same time using a creasing tool 22.22 provided in the end sealing device 20. This packaging bag body 16 is transferred to the introduction conveyor 14 via the discharge conveyor 12 of the packaging machine, and further supplied to the lifter 18 by the introduction conveyor 14. Packaging bag 16 supplied by introduction conveyor 14
is transferred to the mounting table 53, 53 as shown in FIG. 3(b), and the tip of the front ear portion 16a abuts against the stopper 54 to be stopped and positioned. At this time, the product detection sensor 52 disposed on the stopper 54 detects that the lifter 1
The arrival of the packaging bag 16 at the appropriate position of 8 is detected.

When the product detection sensor 52 detects a product, the drive motor 51 starts operating and rotates the front cam 46 . As the front cam 46 rotates, the arm 44 engaged via the cam follower 48 swings about the bin 42 as a fulcrum, so that the lift bar 28 rises while being guided by the plurality of guide rollers 38 . At this time, the holding base 3 of the support base 2B
The body of the packaging bag 16 is placed and supported on the packaging bag 16, and the tips of the pair of ear folding members 34, 34 are placed on the packaging bag 16.
The front and rear ears 16 a and 16 b are brought into contact with each other from below.

The front and rear ears 16a and 16b of the packaging bag 16 that is supported by the support stand 26 and pushed up are shown in FIG.
), its upper surface abuts against the pair of ear bending guides 55, 55, preventing upward movement. Further, since the tip of the ear folding member 34 is in contact with the lower surface of the ear portion 16a (16b) between the body portion and the body portion, the ear portion 16a (16b) is vertically moved downward along the folding pattern. Can be bent.

The packaging bag 16 with both ear parts 16a and 16b bent as described above is further pushed upward.

As shown in FIG. 3(d), the upper surface is held by suction by the suction device 157. At this time, the ears 16a of the packaging bag 16
, 16b has a corresponding bending guide 55 near its lower end.
The lifter 18 is brought into contact with the timing of the lowering of the support base 26, which is prevented from returning to its original position.
The attachment 56 of the transfer conveyor 58 is intermittently driven by the same drive motor 51 as shown in FIG.
), the packaging bag 16 reaches the hanging position.

As described above, since the attachment 56 has an L-shape, the tip of the horizontal portion 56c contacts the bent rear ear portion 16b of the packaging bag 16, and the attachment 56
Fold along the bottom of the

Further, the packaging bag 16 sucked and held by the suction device 57 is transferred while being scooped up by the horizontal portion 56c of the attachment 56. At this time, as shown in FIG.
Attachment 5 is blocking forward movement due to attachment 5.
As the bag 6 moves, the front ear portion 16a is folded in along the bottom surface of the bag body 16.

The packaging bag 16 in which both the ears 16 a and 16 b are folded includes side guide members 68 , 68 disposed downstream of the ear folding guide 55 , a bottom guide member 69 , and an upper guide member 79 . It is transported while being guided by. and,
The packaging bag body 16 is the label sticking device! 70, as shown in FIG. 3(f), the label 65 peeled off from the band 71 is folded into the front and rear ears 16a, which are folded into the bottom surface of the packaging bag 16. 16 b. At this time, the packaging bag 16 moves while being held by the pressing device f77 and the sticking roller 75, so that the label 65 can be reliably pasted on the bottom surface of the packaging bag 16. Note that the label 65 is attached to the bottom surface of the bag corresponding to the notch 56a formed in the attachment 56.

And, as shown in FIG. 4, both ear parts 16a.

The packaging bag 16 with the label 16b attached to the bottom via the label 65 is discharged to the next process via the discharge conveyor 67 and the discharge chute 78, as shown in FIG. 3(g).

As described in detail, the device for folding the ears of a packaging bag according to the present invention bends the front and rear ears downward when lifting the packaging bag, and then bends the ears in the horizontal direction. Since both ears are folded into the bottom of the bag when being transported,
It is possible to reliably bend the ears with a simple configuration. In addition, since the ears are bent while the packaging bag is being held by suction by the suction device, even if the packaged item is easily deformed such as fresh sweets, the packaged item will not be deformed or crushed. .

Furthermore, by providing a folding tool in the end sealing device of the packaging machine and using the tool to form folds in advance on the edges of the packaging bag, the edges can be folded reliably and neatly along the folds. In addition, a label pasting device is provided to affix a label to the bottom surface of the packaging bag while the packaging bag is being transferred by the attachment, so it can be used stably with both ears folded into the bottom surface of the bag. Labeling can be achieved.

Moreover, since the label pasting device is disposed in the middle of the attachment transfer route, the installation space can be used effectively.

In addition, since the lifter and the cable are configured to be driven intermittently by a servo motor, accurate startup and
The first advantageous effect is that stop control becomes possible.

[Brief explanation of the drawing]

FIG. 1 is a schematic configuration diagram of a device for folding the edges of a packaging bag according to an embodiment, FIG. )~
(g) is an explanatory diagram showing the process of folding the ears of the packaging bag over time using the ear folding device, and FIG. It is a schematic perspective view observed from the side. 60...Mendless Cheno

Claims (1)

[Scope of Claims] [1] A device for folding the front and rear edges of a packaging bag that has been formed, filled and packaged, comprising: a conveyor for introducing the packaging bag supplied from a packaging machine; and a downstream side of the introduction conveyor. a lifter disposed on the side so as to be movable up and down, and for pushing up a holding table on which the body of the packaging bag supplied by the conveyor is placed to a required upper position; a pair of ear folding members protruding from the upper surface of the holding stand by a predetermined height and supporting the lower surface of the ears within a predetermined dimension from the front and rear ends of the packaging bag placed on the holding stand; a pair of ears that are arranged in parallel with an interval that allows passage of the holding table in the front-rear direction, and that fold down the front and rear ears of the packaging bag pushed up by the lifter in cooperation with the ear folding member; a bending guide; a suction device disposed above the ear bending guide for suctioning and holding the packaging bag with both ears bent after being pushed up by the lifter in a hanging state; and a suction device that circulates above the lifter. Attachments are disposed at predetermined intervals on the cables that fold the rear ears of the packaging bag held by the suction device along the lower surface of the bag, and transfer the packaging bag while scooping it up. The front ear part of the packaging bag is configured to be folded along the lower surface of the bag via the front ear bending guide in the transport direction while being transferred by the attachment. A device for bending the edges of packaging bags. [2] The packaging bag according to claim 1, wherein a crease is formed in advance between the trunk and the ear of the packaging bag by a crease tool provided in an end sealing device of a packaging machine. Ear bending device. [3] Claim 1 or 2, further comprising a label pasting device for commonly pasting a label on both ears bent on the bottom surface of the packaging bag while the packaging bag is being transferred by the attachment. The device for bending the ears of the packaging bag described above. [4] The lifter and the element body are configured to be driven intermittently by a servo motor, and the operation of the servo motor is controlled by a detection means that detects when the packaging bag has arrived at a predetermined position of the lifter. 4. The device for folding the edges of a packaging bag according to any one of 2 and 3.