JPH11348913A - Bag group packaging method, and its device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a packaging method and its device to market, wherein an external bag is sealed at the side of a bag group when the bag group for which a plurality of bags are stacked, is to be packaged with the external bag, and the bag group stays tidy in the external bag, a packaging body with a favorable appearance is obtained, and a film using amount for the external bag is reduced as much as possible to reduce generation of refuge. SOLUTION: On a receiving table 10, a slidable receiving plate which can reciprocate in the longitudinal direction of a bag group, is provided in advance. On the slidable receiving plate 40, the bag group B is placed, and when a tip end seal is formed, at the same time or immediately after the sealing, the slidable receiving plate 40, on which the bag group B is being mounted, is moved to the receiving table 10 and the external bag, and the tip end of the bag group B is brought into contact with the tip end sealed part, or brought as close as possible. A packaging body B1 is pulled out in the direction of the tip end from the receiving table and the slidable receiving plate, and the rear end part of the bag group packaging body B1 is heat-sealed at the side of the rear end of the bag group B, and the rear end seal is formed by this method, and its device.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for packing a group of a plurality of bags in an outer bag as small as possible.

[0002]

2. Description of the Related Art Conventional methods and apparatuses of this type include:
As shown in FIGS. 9 to 12, in the vicinity of a shallow trough-shaped cradle 10 for receiving the stacked bag groups B, a film band supply device 15 for winding a thermoplastic wrap film band W around the cradle 10. And a vertical heat sealer 25 having a pair of upper and lower vertical seal jaws 26 for welding and fusing the wrapped film wrap W together, and a receiving end on the receiving base 10. A transport device 30 that grips the tip of the package on the table from above and below and transports the tip to the tip;
A transverse heat sealer having a pair of upper and lower transverse seal jaws 28 for vertically clamping a wrap film portion W1 protruding in the front-rear direction of the package B1 from the top and bottom at the front end of the cradle 10. 27, after a plurality of bag groups B are supplied to the receiving table 10, the film band supply device 15 is operated, and the receiving table 10 and the bag group B are both wrapped by a wrap film band W to form a tube. The seam is welded and melted by the longitudinal heat sealer 25, and the tube-shaped wrap film protruding from the cradle 10 to the tip side is transversely heat-sealed. The bag group package B1, which is welded at 27 and is opened in a tube shape only at the rear end from above the receiving table by the transfer device 30, is opened and opened in the tube shape of the bag group package B1. Wrap film portion W2 Wrap film portion W2 of the bag group package B1 opened in the shape of a tube is again heated by the transverse heat sealer 27 again. A device for sealing and a method using the same are known.

However, in this known apparatus and method, after the thermoplastic wrap film band W is wound around the bag group B, the tube-shaped wrap film portion W1 protruding in the front end direction is heat-sealed. Sometimes, we want to heat seal the inner bag group B as much as possible. However, when the bag group is too close, the inner bag group B will be pinched and welding will be incomplete. The film W may be thermally damaged (see FIG. 11). Therefore, in general, a portion of the bag group B which is separated from the inner bag group B by 15 to 20 mm is a heat seal.
Group, packed bag group B
However, when moving in the outer bag or displaying at the store as a bag group package B2, the loaded bag group package B2 looks bad, and when stacked, the bag group package B2 collapses. easy. After opening, the outer bag is discarded as garbage, so it is better to use as little film material as possible.

[0004]

Therefore, according to the present invention, the heat seal position of the outer bag can be set as much as possible so that the inner bag group B can be sealed, thereby saving the material of the outer bag. This is because the group is not disturbed in the outer bag, and the appearance of the bag group package B2 is not degraded at the store, the product value does not decrease, and the amount of garbage is reduced to obtain the bag group package B2. .

[0005]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, according to the present invention, a plurality of bag groups are stacked on a shallow trough-shaped pedestal, and the pedestal group and the pedestal are thermoplastically combined. Chu with open front and back of the cradle with wrap film
Wrap the wrap film together with a heat seal.
To form a complete tube, and heat-sealing the wrapped film portion protruding from the cradle at the end of the complete tube to form a distal seal portion. Then, a wrap film is formed by wrapping a bag group with an outer bag having an open rear end only, and in this state, the wrap film is pulled out from the cradle in the front end direction, and protrudes into the rear end of the wrapped body. Heat seal the opening of the outer bag to seal the rear end.
In the method of forming a complete bag group package, a slide capable of reciprocating in the front-back direction of the bag group on the cradle when a plurality of bag groups are placed on the cradle. A receiving plate is provided in advance, and the bag group is placed on the receiving plate, and at the same time or immediately after forming the tip seal, the slide receiving plate is placed on the receiving table with the bag group placed thereon. And the tip of the group of bags is brought into contact with or very close to the tip seal part by moving the tip of the bag group with respect to the tip seal part with respect to the outer bag. Pulling out from the slide receiving plate toward the front end, and heat sealing the rear end of the bag group at the opening of the outer bag at the rear end of the bag group package to form a rear end seal. And a bag group packaging method characterized by the following.

In order to achieve the above object, the heat sealing method of this bag group packing method is an impulse method of instantaneously heating a heating wire embedded in a seal jaw. Is preferred.

In order to achieve the above-mentioned object, a related device invention is provided with a film for wrapping a thermoplastic wrap film band around a pedestal near a shallow trough-shaped pedestal for receiving a stack of bags. A band feeder, a vertical heat sealer having a pair of upper and lower jaws for fusing and fusing the joined portion of the wrapped film, and a package on the pedestal at the tip end of the pedestal. A transport device for gripping the leading end from above and below and transporting it to the leading end; and a pair of upper and lower transverse seals for vertically holding the wrap film projecting from above and below in the front-rear direction of the package at the leading end of the cradle. After a plurality of bag groups are supplied to the receiving table, the film band supplying device is operated, and the receiving table and the bag group are shared by a plurality of heat sealers having jaws. Wrap it in a It said joint longitudinal heat - tosylate - welded blown La, Chu protrudes from the pedestal to the tip side - Bed shaped wrap film transverse heat - tosylate - welded La,
The carrying device unloads the bag-group package opening only in the rear end from the top of the receiving table in a tube shape, and removes the wrap film portion of the bag-group package opening in the tube shape, It is located at the position of the transverse heat sealer, and again the transverse heat sealer is used to heat the wrap film portion of the bag group package opened in a tube shape.
In the apparatus, a slide receiving plate slightly smaller than the receiving plate is provided on the receiving table so as to be slidable in the front-rear direction with respect to the receiving table. The slide receiving plate is connected to an operating portion of a longitudinal driving means mounted on a table, and the slide receiving plate is at a retracted position before the bag group is supplied onto the slide receiving plate and the receiving stand, After the lap operation of
While the seal jaws of the first transverse heat sealer are closed or shortly thereafter, the slide receiving plate is moved by the front-rear drive means so that the bags on the slide receiving plate are moved in the transverse direction. It advances forward until it comes into contact with the heat seal portion formed by the jaws of the sealer or the heat sealer in the transverse direction, and returns to its original position before the next bag group supply. A bag group packaging apparatus characterized in that:

[0008] In order to achieve the above-mentioned object, the bag group packaging apparatus has an air cylinder device,
It is preferably one of a combination of a solenoid, a linear motor, a combination of a reversible rotating motor and a feed screw, and a combination of a reversible rotating motor and an endless chain mechanism.

In order to achieve the above-mentioned object, all the heat sealers of the bag group packaging apparatus are of an impulse type which instantaneously heats a heating wire embedded in a seal jaw. It is preferable that

In the method according to the first aspect of the present invention, since the method is as described above, the tube group is wrapped in a tube shape by a wrap film and then protrudes to the distal end side. When heat-sealing the wrapped film in the transverse direction, the inner bag group is slightly away from the heat seal, so that the inner bag group is sandwiched during the heat sealing. Damage to the
It functions not to make the seal incomplete (see FIG. 5). Further, after the heat seal portion is formed, the bag group inside is moved forward together with the slide receiving plate, so that the bag group can be advanced to the heat seal portion (see FIG. 6). The heat seal at the rear end is also pulled out of the package with only the rear end opened according to the size of the internal bag group, and then heat-sealed again. There is little room for back and forth, and the bag group acts to be wrapped (see FIGS. 7 and 8).

According to a second aspect of the present invention, in addition to the operation of the first aspect of the present invention, the heat sealing method comprises the steps of using a heating wire embedded in a seal jaw. Since it is an impulse method of heating instantaneously, even if the slide receiving plate advances while the seal jaw is closed, and the bags on this contact the seal jaw via the wrap film,
Since the seal jaw itself is not heated, the bag group advancing step and the heat sealing step can be performed simultaneously without damaging the wrap film or the bag group.

In the apparatus according to the third aspect of the present invention, when the apparatus is operated and the wrap film and the bag group are supplied as described above, the method according to the first aspect of the present invention can be carried out, and a package having the same form as that of the first aspect can be implemented. Acts to form

According to a fourth aspect of the present invention, in addition to the function of the third aspect of the present invention, the front-rear direction driving means includes an air cylinder device, a solenoid, a linear motor, and the rotary motor. The structure is simple because it is one of a combination with a screw or a combination of a reversible rotary motor and an endless chain mechanism. In particular, in the case of an air cylinder device, the size can be reduced and the control can be facilitated.

According to the fifth aspect of the present invention, in addition to the functions of the third and fourth aspects, the method of the second aspect can be carried out, and the heat seal and the bag group are simultaneously advanced. Can be done.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 An embodiment of the invention described in claims 3 to 5, which is shown in FIGS. 1 to 7. As a device which is a prerequisite of this device, it is as described in the section of the prior art, and the same components are the same components or components and have the same functions and effects. Will not be described again.

The above-described wrap film band supply device 15 is composed of a material support device 16 for supporting a wrap film material made of a thermoplastic synthetic resin wound in a roll shape, and a wrap film band W connected thereto. A take-up shaft 17 for taking up as many times as necessary for a single wrap is provided in the front-rear direction near one side of the cradle 10, and the take-up shaft 17 is cantilevered at a position on the unloading side from the cradle. The cantilever support portion 18 is provided so as to be able to reciprocate to the opposite side of the cradle 10 beyond the cradle width with respect to the machine frame 50, and the support portion 18 is configured to reciprocate the cradle 10 in the width direction. It is configured in connection with the means 19. An example of the reciprocating drive means 19 is formed by an endless chain mechanism 20 whose parallel portion is horizontal and provided in the transverse direction of the cradle 10, and a reversible rotating motor 21 connected to a sprocket gear shaft on which the mechanism is engaged. It is. . Also, as a part of the wrap film band supply device 15, the rear end of the receiving table 10 is so arranged that the winding shaft 17 can wrap the bag group B together with the receiving table 10 as the winding shaft 17 reciprocates. Is vertical driving means 2
2, the moving dimension is such that the take-up shaft 17 around which the wrap film band W is wound does not hit the receiving table 10.

As an example of the vertical driving means 22, an air cylinder device 22 supported by a machine frame 50 is used, and its piston 23 is fixed to the rear end of the cradle 10 (FIG. 1). reference).

After a large number of the stacked bag groups B are supplied to the receiving table 10, the winding shaft 17 is rotated by a reversible rotating motor 21.
With the rotation of the endless chain mechanism 20, the wrapping film band W is unwound in the
Through the upper side (or lower side) of the cradle 10 to the opposite side of the cradle 10.

Next, the pedestal 10 is a vertical air cylinder.
With the device 22, the trajectory of the cradle 10 is moved,
The winding shaft 17 is moved downward (or upward), and then the winding shaft 17 is returned to the original position by unwinding the wrap film band W in the transverse direction of the cradle 10 together with the endless chain mechanism 20 by the reverse rotation of the reversible rotating motor 21. Return.

The relationship between the operation of the receiving table 10 and the take-up shaft 17 is that the receiving table 10 does not move up and down at all,
Only makes a round around the cradle 10, that is, the second vertical air cylinder is mounted on the support portion 18 of the winding shaft 17.
The endless chain mechanism 20 is connected via a device (see FIG. 9) 22.
When the take-up shaft 17 moves to the opposite side of the pedestal 10, the height of the take-up shaft 17 is changed by the second vertical air cylinder device 22, and the take-up shaft 17 is moved.
Is also a prerequisite device of the present invention.

In the present invention, a slide receiving plate 40 is mounted on the upper surface of the above-mentioned shallow trough-shaped receiving base 10 so as to be slidable in the front-rear direction of the receiving base 10. Is connected to a piston 42 which is a movable member of a third air cylinder device 41 which is an example of third driving means mounted on the rear end or the machine frame 50, and has a length of 10 to 30 m.
The slide receiving plate 40 can move back and forth within the range of m (see FIGS. 1 to 6). The timing at which the slide receiving plate 40 is moved from the retracted position to the advanced position by the third air cylinder device 41, which is a kind of longitudinal driving means, is determined by the vertical heat sealer 25 and the transverse heat seal. -During or immediately after the closing of the roller 27. The size of the stroke of the slide receiving plate 40 itself has no restrictive meaning.

The receiving table 10 and the slide receiving plate 40
Notches 12 and 45 are formed in the center of the leading edges 11 and 44 of the gripper 3 of the transfer device 30.
1 allows the package B1 to be clamped from above and below. The transport device 30 is for moving the package B1, which is opened only at the rear end by the grip 31, in the forward direction, and passing it out through the welding jaws 28 of the heat sealer 27 in the transverse direction. The moving dimension of the grip 31 is the length of the internal bag group B plus a slight dimension, and the plus dimension is adjusted beforehand to a dimension slightly more than twice the thickness of the bag group. As the driving means of the grip 31 in the front-back direction,
The same mechanism as the horizontal driving means of the winding shaft 17 is illustrated. 32 is an endless chain mechanism, and 33 is a second reversible rotating motor, which is connected to the sprocket gear shaft of the endless chain mechanism 32.

Although the vertical heat sealer 25 and the transverse heat sealer 27 are separately described as known examples,
Even if the upper side and the lower side of each seal jaw are L-shaped or T-shaped when viewed in an interconnected plane, they are devices for implementing the method of the precondition of the present invention. (See FIGS. 2, 4 and 10).

The longitudinal heat sealer 25 and the transverse heat sealer 27 have a heating wire 29 embedded or attached to the welding surface of the seal jaws 26 and 28, respectively. When the upper and lower seal jaws 26 and 28 are closed, it is preferable to use an impulse type heat sealer that instantaneously passes current and heats. In the case where the vertical heat sealer 25 and the transverse heat sealer 27 are of the always-heating type hot plate type, the slide receiving plate is moved forward at the heat-sealing timing.
After the seals 25, 27 are sealed, the upper and lower seal jaws 26, 2
Good after 8 opens.

The operation of the first embodiment is different from that of the known device in that the slide receiving plate 40
Is a standby position, which is a retreat position. In this state, the bag group B is placed on the slide receiving plate 40, and the heat sealers 25, 27
While the shutter is closed or immediately after it is opened, the slide receiving plate advances, and the bag group B placed thereon is heated by the heat sealer 2.
In steps 5 and 27, the sealing member is brought close to the seal portion during or immediately after formation.

[0026]

The method according to the first aspect of the present invention is constructed and operates as described above. For example, a stack of bags such as 10, 20, or 50 sheets is supplied to a receiving table, and the method is performed as described above. Each time the sheet is wrapped with the wrap film band and the slide receiving plate moves forward after the heat seal with the vertical heat sealer and the transverse heat sealer, the heat seal is performed. In other words, the internal bag groups are remote from the heat seal position, the seal is secure, and the seal is advanced while the jaws are closed or shortly thereafter. The groups are almost in contact with each other, and if the moving dimension of the package having only the rear end opened is optimized, the bag group will be packed in an outer bag with almost no margin. Therefore, the bag group does not move unnecessarily in the outer bag of the package after packaging, and the collapse of the package hardly occurs even when the packages are stacked, and the outer bag after opening is discarded as garbage, but the known outer bag. Rather, it is possible to provide a bag group package that can reduce the amount of dust generated by at least about 2 to 5%.

According to the second aspect of the present invention, in addition to the effect of the first aspect of the present invention, since the heat sealer is of an impulse type, when the seal jaw is closed, the inside of the inner part is closed. The bag group can be brought closer to the seal jaws, so that the work process can be shortened and the packaging cost can be reduced.

According to a third aspect of the present invention, the method of the first aspect can be performed by operating the apparatus.
The same processing as the described invention can be performed.

The device invention according to a fourth aspect of the present invention has a simple structure, and the operation control thereof is also known, in addition to the effects of the third aspect of the invention, since the longitudinal driving means for the slide receiving plate is as described above. It has the effect that can be easily done by the method.

[0030] In addition to the effects of the third or fourth aspect of the present invention, the apparatus according to the fifth aspect of the present invention is capable of moving the bag group forward by moving the slide receiving plate while the seal jaws are closed. There is no danger of damaging the bags or the internal bags, and the cycle time of packaging can be reduced.

[Brief description of the drawings]

FIG. 1 is a side view showing a principle mechanism of a typical embodiment of the present invention.

FIG. 2 is a plan view of FIG.

FIG. 3 is a front view taken along line 3-3 of FIG. 2;

FIG. 4 is a perspective view of a receiving base and a slide receiving plate portion.

FIG. 5 is a longitudinal sectional side view immediately before the bag group is wrapped and the front end is sealed.

FIG. 6 is a vertical sectional side view showing a state in which a front end portion is sealed and a bag group is advanced together with a slide receiving plate.

FIG. 7 is a vertical cross-sectional side view of the package body in a state where the package body with only the rear end opened has been advanced by the conveying means.

FIG. 8 is a longitudinal side view of a complete package.

FIG. 9 is a front view of a known device.

FIG. 10 is a plan view of FIG. 9;

FIG. 11 is a partially cutaway perspective view showing a bag group being wrapped.

FIG. 12 is a partially cutaway perspective view of a known package.

Claims (5)

[Claims] 1. A tube in which a plurality of bag groups are placed on a shallow trough-shaped cradle, and the cradle group is opened together with the cradle by a thermoplastic wrap film band. And wrap the wrapped film strip with a heat seal.
To form a complete tube, and heat-sealing the wrapped film portion protruding from the cradle at the end of the complete tube to heat the tip seal portion. A wrap formed and packed in a bag group with an outer bag opened only at the rear end, and in this state, the wrap is pulled out from the cradle toward the front end, and wrapped over the rear end of the package. Heat seal the opening of the outer bag of the film to seal the rear end.
Forming a complete bag group package, wherein when the plurality of bag groups are placed on the cradle, the slide is reciprocally movable in the front-rear direction of the bag groups on the cradle. A receiving plate is provided in advance, and the bag group is placed on the receiving plate, and at the same time or immediately after forming the tip seal, the slide receiving plate is placed on the receiving table with the bag group placed thereon. And the tip of the group of bags is brought into contact with or very close to the tip seal part by moving the tip of the bag group with respect to the tip seal part with respect to the outer bag. Pulled out from the slide receiving plate toward the front end, and heat-sealed the rear end of the bag group at the opening of the outer bag at the rear end of the bag group package.
And forming a rear end seal. 2. The bag group packaging method according to claim 1, wherein said heat sealing method is an impulse method of instantly heating a heating wire embedded in a seal jaw. 3. A film band supply device for winding a thermoplastic wrap film band around said pedestal in the vicinity of a shallow trough-shaped cradle for receiving a group of stacked bags. A vertical heat sealer having a pair of upper and lower jaws for fusing and fusing the parts, and a transport for gripping the tip of the package on the receptacle from above and below at the tip of the receptacle and transporting the tip to the tip. And a transverse heat sealer having a pair of upper and lower transverse seal jaws for holding the wrap film projecting from above and below in the front-rear direction of the package from the top and bottom on the tip side of the cradle. After a plurality of bag groups are supplied to the cradle, the film band supply device is operated, and the cradle and the bag groups are shared.
And wrap it in the shape of a vertical
A tube-shaped wrap film that is welded and blown off by a stirrer and that protrudes from the pedestal to the front end side is welded by a transverse heat sealer, and only the rear end of the tubing from the top of the pedestal is transported by the transfer device.
The bag group packaging body opening in a tube shape is carried out, and the wrap film portion of the bag group packaging body opening in a tube shape is
It is located at the position of the transverse heat sealer, and again the transverse heat sealer is used to heat the wrap film portion of the bag group package opened in a tube shape. In the above apparatus, a slide receiving plate slightly smaller than the receiving plate is provided on the receiving table surface so as to be slidable in the front-rear direction with respect to the receiving table. The slide receiving plate is connected to an operating portion of a longitudinal driving means mounted on a table, and the slide receiving plate is at a retracted position before the bag group is supplied onto the slide receiving plate and the receiving stand, After the lap operation is completed, while the seal jaws of the first transverse heat sealer are closed or immediately thereafter, the slide receiving plate is moved by the front-rearward driving means to the bag on the slide receiver plate. Group of heat sealers in the transverse direction Characterized in that it moves forward until it comes into contact with the heat seal portion formed by the jaw or the crosswise direction of the heat sealer jaw, and returns to its original position by the time of the next bag group supply. Bag group packaging equipment. 4. The longitudinal driving means is one of an air cylinder device, a solenoid, a linear motor, a combination of a reversible rotating motor and a feed screw, and a combination of a reversible rotating motor and an endless chain mechanism. 4. The bag group packaging device according to claim 3, wherein: 5. The bag group packaging apparatus according to claim 3, wherein all the heat sealers are of an impulse type for instantly heating a heating wire embedded in a seal jaw.