JPH0447046Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention mainly relates to a tube packaging device for polyethylene laminated semi-foldable bags.

[Conventional technology and its problems]

BACKGROUND OF THE INVENTION It has been conventionally practiced to package articles using endless tubes made of polyethylene, and the methods can be roughly divided into the so-called kangaroo pack method and the clamp method.

The former method involves making an incision in the width direction of one side of the endless tube and inserting the article through the incision.A typical method is to make perforations on both sides in the first stage, squeeze only the perforations on one side, and then cut. There is a method in which air is blown into the cut area to expand it, and the blade is held in this state with an opening claw while being inserted.

However, this method has the disadvantage that it is difficult to obtain a tight and tightly packaged state for the article, and since the opening of the tube is performed by blowing air, delicate control of the nozzle angle and air pressure is required, and the perforation Since the material of the film is selected for ironing, it is necessary to select a film according to each temperature condition, and measures against wear of the ironing member are also necessary. For these reasons, there is a drawback that the packaging operation lacks stability and reliability, and the apparatus becomes large in size.

The latter clamping method is shown in Japanese Patent Publication No. 52-64385, Japanese Patent Publication No. 2375-1975, Japanese Patent Publication No. 4603-1983, Japanese Patent Publication No. 3207-1987, etc.
The clamper grips the mouth edge of the tube and pulls it up a certain length to insert items, cut the tube, and seal it. This method is less unstable than the air-blowing opening method, but because the clamp claw is raised and lowered over a long stroke, the device is large and
It is complicated, and it is difficult to make the package tight. Especially when the packaged item is a weak polyethylene laminated half-fold bag, the problem of being packaged while being bent in a dogleg shape tends to occur.

From the above points, there is currently no practical tube packaging method for packaging polyethylene laminated half-fold bags, so generally a single bag is made with one side sealed in advance, and then the above bags are wrapped manually. A complicated and time-consuming method has been adopted, in which the film is inserted and sealed, or the film is moved and folded in half, and the item to be packaged is placed on the film at the same time.

[Means for solving problems]

The present invention is an attempt to solve the above-mentioned problems, and its purpose is to reliably, stably, and tightly package laminated half-fold bags made of polyethylene, which are weak and slippery, in tubes. To provide a tube packaging device which is simple and compact in structure.

To achieve this purpose, the present invention provides a feed belt on one side of the machine frame that accelerates and feeds weak laminated plastic film products, such as laminated and half-folded bags, diagonally downward. In the vicinity of the belt, a cylindrical caser with a flat cross-section having an enlarged opening communicating with the feed belt at the rear end, and a lower feeding roller belt in contact with the lower surface of the cylindrical caser are held, and the cylindrical caser A tilting frame is installed to change the lower feeding roller belt between a downwardly tilted position that coincides with the axis of the feeding belt and a horizontal position. In addition to providing a means for providing eyes,
Downstream of the perforation forming means, on the axis of the horizontal posture of the cylindrical caser, there is an open core having a cross-sectional area equal to or larger than the opening at the tip of the cylindrical caser, and the open core is inserted from above and below. A holding frame is provided which includes a tube feeding roller that pinches the tube and moves the rollers back and forth with respect to the cylindrical caser in a horizontal position, and a holding frame is provided between the holding frame and the feeding belt when the cylindrical caser is swung in a horizontal position. An upper feed-in roller belt is provided in contact with the upper surface of the holding frame, and a lower frame for moving the caser discharge upper roller and the seal cylinder back and forth is provided below the holding frame.
In the vicinity of the cylindrical caser in the downwardly tilted position, there is a sealing tube that pairs with the seal cylinder, an enveloping tube that pairs with the caser discharge upper roller, and a laminated plastic film product charged therein. A lower caser discharge roller is provided for extracting and discharging the caser from inside and outside, and a stopper for adjusting the position of the inlet seal and a tiltable discharge shutter having a discharge roller are provided downstream from the seal hole.

〔Example〕

Embodiments of the present invention will be described below with reference to the accompanying drawings.

1A to 1D schematically show a tube packaging device according to the present invention, in which 1 is a cylindrical caser, which has a cross-sectional shape and dimensions corresponding to the laminated half-fold bags to be wrapped. Although the illustrated shape is rectangular, it is not limited to this; for example, it may be in the shape of an inverted triangle or a split circle inscribed in the rectangular outline.This reduces the tube width and allows for tighter packaging. becomes possible. The rear end opening 10 of the cylindrical caser 1 is widened in a trumpet-like or funnel-like shape to facilitate loading. This cylindrical caser 1 can be swung at a required rotation angle by the swiveling arm body 6 of the upper fulcrum 61.

Reference numeral 2 denotes an open-mouthed core, which preferably has a cross-sectional area slightly larger than the cross-sectional area of the tip opening (outlet) 11 of the cylindrical caser 1, and has a convexity on its tip surface that fits into the tip opening 11 of the cylindrical caser 1. 20, and a tapered guide surface 21 for opening the tube is formed at the rear end. This opening core 2 is a cylindrical caser 1
It can be freely moved towards and away from the target.

3 and 3' are upper and lower feed-in roller belts arranged to sandwich the upper and lower surfaces of the cylindrical caser 1, and are designed to rotate synchronously with a feed-out roller, which will be described later. In the illustrated embodiment, the upper feed-in roller belt 3 is fixed in position, and the lower feed-in roller belt 3' is configured to interlock (swing) with the cylindrical caser 1.

Reference numerals 4 and 4' designate feed-out rollers (the same applies hereinafter, including a combination of a roller and a belt) that sandwich the upper and lower surfaces of the open core 2, and are moved linearly in conjunction with the open core 2.

5 and 5' are feed shooters 5 for laminated semi-folded bags A.
This is an upper and lower feed belt provided between the caser 0 and the cylindrical caser 1.

Figures 2 and 3 show the details of the tube packaging device according to the present invention. 7 is a machine frame, and 8 is an endless tube supply mechanism attached to the upper part of the machine frame 7, which applies a certain tension when the tube is drawn out. A dancer roller 81 is provided for feeding.

The cylindrical caser 1 is connected and fixed via a leaf spring or a hinge 9 to a swinging arm body 6 having a substantially inverted L-shaped side surface that descends from a swinging shaft 61 supported on the machine frame 7, and has at least a rear end opening. 10 and the inner surfaces of the tip opening 11 are smooth surfaces with a small coefficient of friction. The rear end opening 10 is connected to the feed belts 5, 5' as shown in FIG.
It is intricately divided in the width direction so that it fits between the two.

A lower feed-in roller belt 3' is in contact with the lower surface of the cylindrical caser 1, and a rotating shaft of this roller belt 3' is supported by a tilting frame 18 that is integrally connected to the swing arm body 6. , the tilting frame 18 is connected to a swing cylinder 19 installed below the machine frame 7, whereby the cylindrical caser 1 and the lower feed roller belt 3' are connected to the swing shaft 6.
1 as a fulcrum, the upper surface of the cylindrical caser 1 rises until it comes into contact with the upper feed-in roller belt 3'.

The upper and lower feeding roller belts 3, 3' are constructed by suspending an endless strip made of urethane or the like between left and right rubber rollers.

On the other hand, the opening core 2 and the feeding rollers 4, 4' that sandwich the upper and lower surfaces thereof are mounted on a holding frame 12 arranged in the machine frame 7, and are moved by a moving cylinder 13 fixed to one end of the machine frame 7. It is designed to be moved back and forth to a position where it connects with the tip opening 11 of the cylindrical caser 1 located at the upper limit position. A film tensioner frame 16 including a guide roller 14 of an endless tube A and a perforation cylinder 15 is provided above the holding frame 12.

Furthermore, a lower frame 17 is attached to the lower side of the holding frame 12 and is slid by a lower moving cylinder 22. The lower frame 17 has a caser discharge upper roller 23 at its front end, and a seal cylinder 24 at the rear thereof. Each is provided.

Further, in the axial direction of the seal cylinder 24 in the forward position of the lower frame 17, an impulse seal element 25 is disposed at a level slightly higher than the upper surface level of the lower feed-in roller belt 3'. The caser upper discharge roller 23 is disposed between the feeding roller belt 3'.
A caser discharge lower roller 23' paired with the caser discharge lower roller 23' is provided so as to be movable up and down by an elevating cylinder 26.

Furthermore, on the discharge side of the impulse seal 25, a discharge shuttler 27 is supported at one end by a pivot shaft 29 and is provided so as to be able to be raised and lowered by an elevating cylinder 28. A stopper 30 is disposed so as to be adjustable in position, and a lower discharge roller 31' is provided at a position below the discharge shutter 27 in the thickness direction, and a lower discharge roller 31' is provided at a position in which the discharge shutter 27 is raised.
An upper discharge roller 31 is arranged to form a pair with 1'.

Although it is preferable to use the device of the present invention by placing it on the exit side of the folding machine, it can of course also be used as a stand-alone device, and the half-folding bag can be used not only for garbage bags but also for bags with handles. It can also be used to package various laminated films other than half-fold bags.

[Effect of the embodiment]

Next, the operation of the device of the present invention will be explained.

The cylindrical caser 1 is connected to the lower feeding roller belt 3'
At the same time, it is raised by the swinging cylinder 19 using the upper fulcrum 61 as a swinging fulcrum, and the upper feeding roller belt 3 comes into contact with the upper surface of the cylindrical caser 1 . Next, by the operation of the moving cylinder 13, the holding frame 12 moves forward from the state shown by the solid line in FIG. The portion 20 is the cylindrical caser 1
The opening core 2 and the cylindrical caser 1 are integrated in series.

On the other hand, the endless tube B is supplied from the supply body 8 to the film tensioner frame 16, perforated by the perforation cylinder 15, sent to the open-mouth core 2, and guided by the taper rollers 4 and 4'. It is fed out onto the outer surface of the open-mouthed core 2 while being opened at the surface 21, and is further fed a predetermined length while enclosing the cylindrical caser 1 by the upper and lower feeding roller belts 3, 3'. The perforations are located slightly in front of the feed rollers 4, 4'.
Using an open core and a cylindrical caser that are aligned in series,
Since the cross section of the cylindrical caser is slightly smaller than that of the opening core, even films that tend to stick together due to static electricity can be opened easily and reliably.

When the endless tube B is fed by a predetermined length, the opening core 2 and the feeding rollers 4, 4' are moved to the holding frame 1 by the backward movement of the moving cylinder 13.
2, the endless tube B is retracted by this action, and a forcible tensile force is applied to the endless tube B back and forth, and the endless tube B is cut from the perforation. This creates an encapsulated tube B' of a predetermined length.

After the backward movement of the holding frame 12 is completed, the cylindrical caser 1 is lowered together with the lower feed-in roller belt 3' due to the retraction of the swing cylinder 11, and as a result, the rear end (perforation cut part) of the enveloped tube B' is opened. It slips out of the core 2 and descends, and the rear end rests on the impulse seal 25 protruding from the inclined line by a height approximately half the thickness of the envelope tube, and then stops.

After lowering the cylindrical caser 1 and the envelope tube B',
By the operation of the lower moving cylinder 22, the seal cylinder 24 is moved to a position facing the impulse seal part 25, and at the same time as the movement is completed, the impulse seal part 25 is energized and the seal cylinder 24 is lowered. As a result, the rear end of the encased tube B' is sealed at approximately the center of the tube thickness (caser thickness) as shown in Figure 3, forming a bottom seal part c that has a good appearance and is suitable for packaging. be done. After the time-up, the seal cylinder 24 rises and waits for the stacked half-folded bags A to be introduced.

When the laminated half-folded bags A slide out from the shooter 50, the feed belts 5, 5' accelerate and advance the laminated half-folded bags A. In front of this, an expanded rear end opening 10 of a downwardly inclined cylindrical caser 1 opens.
Therefore, the laminated half-folded bags A smoothly pass through the cylindrical caser 1, and stop when the tip abuts the bottom seal portion c of the envelope tube B'. The laminated half-folded bags A are squeezed from above and below by the feed belts 5 and 5', and held in this state inside the thin cylindrical caser 1, so that tight packaging can be performed without bending.

Loading of laminated half-folded bags is carried out using feed belts 5 and 5'.
Detected by placing phototubes above and below,
A signal is sent to the lifting cylinder 26 via the timer, so that the lower caser discharge roller 23' is raised, and the caser discharge upper roller 23 attached to the lower moving frame 17 moves up and down the envelope tube.
Insert B′. As the caser discharge lower roller 23' rises, the envelope tube B' is pushed up.
The leaf spring or hinge fixing the cylindrical caser 1 is slightly warped as shown in FIG.
lifted from the contact surface.

In this state, the caser discharge upper roller 23 and the caser discharge lower roller 23' simultaneously rotate in the discharge direction, so that the enveloped tube B' and the laminated half-folded bags A loaded therein are simultaneously removed from the cylindrical caser 1. It is extracted and discharged from the inside and outside.

Enclosed tube with laminated half-fold bags inside
B' slides on the discharge shooter 27, which is at a level lower than half its thickness, and comes to a stop when it hits a stopper 30 for adjusting the position of the inlet seal facing the front end.

As a result, the cylindrical caser 1 of the enveloped tube B'
The tube opening that surrounds the distal end of the tube passes between the caser 1 discharge upper roller 23' and the caser discharge lower roller 23', and stops at a sealing position on the upper surface of the impulse sealing hole 25. When the stopper 30 collides with the stopper 30, a signal is sent from the detection device 32 to the swing cylinder 11, and as a result of this operation, the cylindrical caser 1 rises with the swing shaft 61 as a fulcrum together with the lower feed roller belt 3', and the cylindrical The upper feed roller belt 3 is in contact with the upper surface of the caser 1 in preparation for the next cycle. At the same time, a perforation is made by the perforation cylinder 15 at the next predetermined cutting location.

At the same time, by re-energizing the impulse seal 25 and lowering the seal cylinder 24, the inlet opening of the enveloped tube B' is sealed with the edges aligned at approximately the center of its height, and the inlet seal portion
C' is formed and becomes the target envelope C.

In this process, the laminated half-folded bags A are still in a packaged state as they hit one end (bottom seal part) of the envelope tube B', so the inlet opening of the envelope tube B' is closed. There is plenty of room for the cut,
Moreover, laminated half-folded bags A are impulse-sealed 25
Because it stops in a lower position at a higher level, there is no risk of the stacked half-fold bags A being accidentally sealed together with the inlet opening of the envelope tube B'.

After seal time-up, seal cylinder 24
is retracted, and then the lower moving cylinder 22 is activated, so that the lower frame 17 equipped with the seal cylinder 24 is retracted to the standby position.

The envelope bag C thus obtained is then lifted from the downwardly inclined state to a horizontal position by the elevating cylinder 28, so that it is sandwiched from above and below by the ejecting rollers 31, 31', and by the rotation of the ejecting rollers 31, 31'. The products are discharged to the fixed shooter 33 and boxed appropriately, and the entire process is completed.The above steps are then repeated to automatically perform packaging.

In the case of the present invention, the cylindrical caser 1 does not function as a simple loading member, but also as a means for shaping the tube B' into a state that closely approximates the dimensions of the packaged object in cooperation with the open-mouthed core 2. , and function as a means for holding the packaged articles in a tightly stacked state without losing their shape, and further function as a means for simultaneously discharging the packaged tube B' and the packaged articles.
Therefore, a collection of weak films can be tightly packaged in a bag of the minimum required size.

[Effect of idea]

According to the present invention as described above, the cylindrical caser 1 is pulled upward and downward in a horizontal position by the upward movement of the tilting frame 18 and the forward movement of the holding frame 12, and is held between the roller belts 3 and 3', and has an opening at the rear end. The cores 2 are integrated in series, and the perforated tube B' can be easily fed out by the feeding rollers 4, 4' and the upper and lower roller belts 3, 3', and a flat cylindrical caser is formed. The envelope tube B' of a predetermined length can be automatically created by retracting the holding frame 12. Then, due to the downward movement of the tilting frame 18, the cylindrical caser 1 and the roller belt 3' come into alignment with the axes of the feed belts 5 and 5', and the rear end of the enveloped tube B' comes out of the open core 2. The bottom seal c is smoothly and reliably created by standing on the sealing plate 25, operating the lower frame 17, and operating the seal cylinder 24. In this state, laminated plastic film product A
is inserted into the cylindrical caser 1 while being squeezed and flattened by the feed belts 5, 5', and stops when the tip hits the bottom seal c, and is driven by the upper and lower caser discharge rollers 23, 23'. While being held in place, the encapsulated tube B' with a bottom and the laminated plastic film product A are pulled out diagonally downward from the inside and outside of the cylindrical caser 1, and are stopped when they hit the stopper 30 for adjusting the position of the inlet seal, and the encapsulated tube is removed. tube
The opening of B' is located in the sealing hole 25 and is sealed at the entrance by the sealing cylinder 24. Because packaging is carried out in this process, even though the packaged items are made of weak laminated plastic film products and the tubes are made of thin, stiff film, it is possible to avoid applying force to them and bending them. It has the excellent effect of being able to reliably pack tightly into a bag of the minimum necessary size without having to do this, and to automatically pack the packaging film neatly without making any scratches, holes, or local stretching. can get.

[Brief explanation of the drawing]

Figures 1 a to d are explanatory diagrams showing step-by-step an embodiment of a tube packaging device according to the present invention, Figure 2 is a longitudinal cross-sectional side view showing an embodiment of the present invention, and Figure 3 is a FIG. 3 is a perspective view showing the connection between the cylindrical caser and the feed belt. 1...Tubular caser, 2...Open-mouth core, 3,
3'...Feeding roller belt, 4,4'...Feeding roller, 5,5'...Feeding belt, 7...Machine frame, 8...Endless tube supply mechanism, 10...
... Expanded opening, 12... Holding frame, 15...
...Perforation cylinder, 17...Lower frame, 1
8...Tilt frame, 23, 23'...Caser discharge roller, 25...Seal plate, 27...Discharge shutter, 30...Stopper for adjusting the position of the inlet seal, 31...Discharge roller.

Claims (1)

[Scope of claim for utility model registration] Feed belts 5 and 5' are provided on one side of the machine frame to accelerate and feed weak laminated plastic film products, such as laminated and half-folded bags, diagonally downward. In the vicinity of the feed belts 5, 5', there is a cylindrical caser 1 with a flat cross-section having an expanded opening 10 communicating with the belts 5, 5' to be fed to the rear end, and a cylindrical caser 1 that is in contact with the lower surface of the cylindrical caser 1. a tilting frame that holds the lower feed roller belt 3' and changes the cylindrical caser 1 and the lower feed roller belt 3' between a downwardly inclined position coinciding with the axis of the feed belts 5, 5' and a horizontal position; 18, and on the other side of the machine frame, a means for applying perforations to the tube fed out from the endless tube supply mechanism 8 is provided, and downstream of the perforation applying means, a horizontal line of the cylindrical caser 1 is provided. It is equipped with an open-mouth core 2 having a cross-sectional area equal to or larger than the tip opening of the cylindrical caser 1 and tube feeding rollers 4, 4' that sandwich the open-mouth core 2 from above and below on the axis of the posture. A holding frame 12 is provided to move these back and forth with respect to the cylindrical caser 1 in a horizontal position, and the holding frame 12 and feeding belts 5, 5'
An upper feed-in roller belt 3 is provided between the cylindrical caser 1 and the caser 1 discharging upper roller 23 and a seal cylinder on the lower side of the holding frame 12. A lower frame 17 is provided to move the seal cylinder 24 back and forth, and a seal cylinder 2 is provided near the cylindrical caser 1 in a downwardly inclined position.
a sealing blade 25 paired with the upper caser discharge roller 23, and a lower caser discharge roller which extracts and discharges the encased tube B' and the laminated plastic film product loaded therein from the inside and outside of the cylindrical caser. 23', and a tiltable discharge shutter 27 having a stopper 30 for adjusting the entrance seal position and a discharge roller 31 downstream of the seal blade 25.