JPS62260611A - Method and device for packaging tube - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention mainly relates to a tube packaging method and apparatus for polyethylene laminated semi-foldable bags.

(Prior Art and its Problems) Packaging of articles using endless polyethylene tubes has been practiced for a long time, and the methods can be roughly divided into the so-called Kangal pack method and the clamp method.

The former method involves making an incision in the width direction of one side of an endless tube and inserting the item 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 then the product is held in this state with an opening claw while being introduced. Since the opening is performed by blowing air, delicate control of the nozzle angle and air pressure is required, and the film material is selected for ironing to open the perforations, so the film must be selected in accordance with the temperature conditions. Moreover, it is necessary to take measures against wear of the ironing member.As a result, there is a drawback that the packaging operation lacks stability and reliability, and furthermore, the size of the apparatus increases.

The latter clamping method is described in Japanese Patent Publication No. 5:3-2375,
This is shown in Japanese Patent Publication No. 55-4603, Japanese Patent Publication No. 55-3207, etc., and uses a clamper to grasp the edge of the tube and pull it up a certain length to insert articles, cut the tube, and seal it. . This method is less unstable than the air-blowing opening method, but since the clamp claw is raised and lowered over a long stroke, the device becomes large and complicated, and it is difficult to wrap the package tightly, especially when the packaged items are stiff. In the case of polyethylene laminated half-fold bags, which have a weak structure, they tend to be packaged in a dogleg shape.

From the above points, there is currently no practical tube packaging method for packaging polyethylene laminated semi-foldable bags.Therefore, in general, a single bag is made with one side sealed in advance, and then the above-mentioned bags are wrapped manually. The method used was to insert the film and seal it, or to fold the film in half while moving it, and to place the package on it at the same time, which was a complicated and time-consuming method.

(Means for Solving the Problems) The present invention was devised through research in view of the above-mentioned circumstances, and its purpose is to solve the problem of laminated half-foldable bags made of polyethylene, which are weak and slippery. Another object of the present invention is to provide a novel packaging method that can reliably, stably and tightly package tubes.Another object of the present invention is to provide a novel packaging method that is suitable for carrying out the above method and has a simple and compact structure. An object of the present invention is to provide a tube packaging device.

In order to achieve this object, the present invention includes a step of connecting an open-mouthed core to the tip opening of a cylindrical caser. A step of cutting the tube at the core side part and sealing one side, a step of inserting the packaged object through the opening at the rear end of the cylindrical caser, and a step of extracting the tube together with the packaged object from the cylindrical caser. The process of sealing the remaining one side is repeated in sequence.

Further, the present invention provides a swingable cylindrical casing having means for accelerating and feeding a desired packaged object such as laminated and half-folded bags, and a widening opening communicating with the conveying means at the rear end. and a retracting roller belt which pinches the upper and lower surfaces of the cylindrical caser and forwards the tube, and which is disposed so as to be able to come into contact with and separate from this at the swinging position of the cylindrical caser, and which has a tip opening (!: equivalent An open core having the above cross-sectional area, tube feeding means disposed above and below the open core, and perforation providing means provided between the tube forward feeding and the open core. and a sealing means disposed near the cylindrical caser at the lower limit position.

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

Figures 1 (a) to (d) schematically show the tube packaging method according to the present invention, where ■ is a cylindrical caser, which has a cross-sectional shape and dimensions that correspond to the laminated half-fold bags to be wrapped. Equipped with. 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.If the tube width is smaller, tighter packaging can be achieved. becomes possible. The rear end opening 10 of the cylindrical caser 1 is expanded into a trumpet-like or funnel-like shape to facilitate loading. Then, this cylindrical caser 1 is moved Ff by the swinging arm body 6 of the soil support 61.
It is old and can swing at a rotation angle of tT.

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) II of the cylindrical caser 1, and has a convex portion 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 open-mouthed core 2 can be moved toward and away from the cylindrical case 1.

Reference numeral 3.3 denotes upper and lower feed-in roller belts that are arranged to sandwich the -F lower surface of the cylindrical caser 1, and are designed to rotate synchronously with a feed-out roller (to be described later). In the illustrated embodiment, the upper feeding roller belt 3 is fixed in position, and the lower feeding roller belt 3 is configured to interlock (swing) with the cylindrical caser 1.

4.4 is [ ] a feeding roller ( ) that pinches the upper and lower surfaces of the opening core 2
The same applies hereafter, including the combination of mouth and belt), and LT
It is moved linearly in conjunction with the opening core 2.

Reference numeral 5.5 denotes a feed belt located one floor below, which is provided between the feed chute 50 and the cylindrical caser 1 of the laminated semi-folded bags A.

When packaging the required number of stacked and half-folded bags A, the present invention is designed to move the cylindrical case → J-I from the downwardly inclined position to the outer position from the swinging arm 61 as shown in FIG. 1 (al). Then, the open-mouth core 2 is moved forward and connected to the cylindrical caser 1 via the convex portion 20. On the other hand, the endless tube B is perforated, and in this state, the open-mouth core 2ζ is send out.

The fed-out endless tube B is fed out by the feeding roller 4.
It is forcibly spread by the tapered guide surface 21 of the open-mouthed core 2 by being continuously advanced by A, and is further fed in until it covers the outer surface of the cylindrical caser 1 by the feeding roller belts 3 and 3'. . This retraction operation is performed at the perforation,
Predetermined position of the opening core 2 (position in front of the feeding belt)
The feed roller 4. This is achieved by adjusting the drive amount of the roller belt 3.3 and the feed roller belt 3.3.

When the perforations have stopped at the predetermined positions in this manner, the opening core 2 is moved back as shown in FIG. 1 (1). In this way, the endless tube B is clamped from above and below by the feeding roller belts 3, 3 on the cylindrical caser side and the feeding rollers 4, 4 on the open core side, so that the open core 2 By the backward movement of the tube, the tube is forcibly cut from the perforation, and the envelope tube B of the required length is thus made.

Next, as shown in FIG. 1 (cl), the cylindrical caser 1 is swung to the lower limit position by the oscillating arm body 6, and the perforation portion is sealed by the sealing mechanism provided at this position, forming the bottom seal portion C. Subsequently, the laminated half-folded bags A are sent from the feed chute 50, and are transferred to the feed belt 5.5.
Press from above and below with . Since the rear end opening 10 of the cylindrical caser 1 is expanded, the feed belt 5,
The laminated half-folded bags A accelerated in step 5 slides into the downwardly inclined cylindrical caser 1 without stopping, and as shown in FIG.
), the front end passes through the tip opening 10 and is fed in at once until it comes into contact with the bottom seal part C.

Next, the upper and lower discharge rollers 23, 23 located between the sealing mechanism and the tip of the cylindrical caser -1 rotate, and the vicinity of the bottom seal of the enveloped tube 100 is clamped in the thickness direction by the discharge rollers 23, 23. Therefore, the laminated half-folded bags A that are reliably extracted from the cylindrical caser 1 and housed in the cylindrical caser 1 are also clamped by the discharge rollers 23 and 23, so that the cylindrical caser 1 is not tilted. It is pulled out together with the enveloping tube d.

Then, at the position where the wrapped Tupro has been ejected for the length of the bag, seal the remaining entrance side using the previous sealing mechanism to complete the wrapping, and then discharge the wrapped material by an appropriate means. One cycle ends.

Figures 2 and 3 show a tube packaging device according to the present invention, where 1 is a machine frame, and 8 is an endless tube forward feeder attached to the upper part of the machine frame 7, which provides a constant tension when drawing out the tube. A dancer roller 81 is provided for this purpose.

The cylindrical caser 1 has a swing shaft 61 supported on the machine frame 7.
It is connected and fixed via a leaf spring or hinge 9 to a swinging arm body 6 whose side surface is substantially inverted, which descends from the base, and at least the inner surfaces of the rear end opening 10 and the tip opening 11 are smooth surfaces with a small coefficient of friction. . As shown in FIG. 3, the rear end opening 10 is divided into a plurality of parts in the width direction so as to fit between the feed belts 5 and 5'.

A lower feed-in roller belt 3' is in contact with the lower surface of the front Rr' 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 swinging cylinder 19 installed below the machine frame 7, so that the cylindrical caser 1 and the lower feeding roller peltoy rotate around the swinging shaft 61 as a fulcrum. It is designed to rise until the upper surface touches 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 I2 arranged in the machine frame 7, and a moving cylinder 13 fixed to one end of the machine frame 1
As a result, the tip opening 11 of the cylindrical caser 1 at the upper limit position
It is designed to move forward and backward until it connects with the robot. A film tensioner frame 16 including a guide roller 14 of the endless tube A and a perforation cylinder 15 is installed above the holding frame 12.

Further, a lower frame 17 that is slid by a lower moving cylinder 22 is attached to the lower side of the holding frame 12, and a caser discharge upper roller 23 is attached to the front end of the lower frame 17.
However, seal cylinders 24 are provided at the rear of these.

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

On the discharge side of the impulse seal blade 25, a discharge chute 27 is supported at one end by a pivot shaft 29 and is provided so as to be movable up and down by an elevating cylinder 28, and a front end area of the discharge chute 27 is provided independently from the chute. stopper 3
0 is arranged so that its position can be adjusted, and a lower discharge roller 31' is provided at a position below the discharge chute 27 in the thickness direction.
The lower discharge roller 3 is located at the raised position of the discharge chute 27.
An upper discharge roller 31 that is paired with 1 is disposed.

It is preferable to use the device of the present invention by placing it on the exit side of the folding machine, but of course it can also be used as a stand-alone device. In addition, it can also be used for packaging various laminated films other than those made by half-folding.Next, the operating conditions and functions of the device of the present invention will be explained.

The cylindrical caser 1 is raised by the swing cylinder 19 together with the lower feed-in roller belt 3' using the upper support point 6I as a swing fulcrum, and the upper feed-in roller belt 3 comes into contact with the upper surface of the cylindrical caser 1. Next, the holding frame 12 moves forward from the solid line state in FIG. 2 as shown in the imaginary line by the operation SaC of the moving cylinder 13, and as a result, the open-mouthed core 2 held by the feeding rollers 4 and A moves forward, and the convex tip of the core 2 moves forward. The portion 20 fits into the tip opening 11 of the cylindrical caser iris, and the open-mouthed 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, and the perforation cylinder 1
5, perforations are made and sent to the opening core 2,
Driven by the feeding rollers 4, 4, the tapered guide surface 21 opens the core 2 and feeds it out onto the outer surface of the open-mouthed core 2. Further, the upper and lower feeding roller belts 3.3 enclose the cylindrical caser 1 in a predetermined position. The length will be sent. The perforation is the feed roller 4. It is located slightly in front of A. Using an open-mouthed core and a cylindrical caser that are aligned in series, and because the cross section of the cylindrical caser is slightly smaller than that of the open-mouthed 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,
Due to the backward movement of the movable cylinder 13, the opening core 2 and the feeding rollers 4, 4 are moved backward by the holding frame 12, and due to this movement, a forced tensile force is applied to the endless tube B in the front and rear directions, and the endless tube B is cut from the perforation. .

This creates a predetermined length of encapsulated tube.

After the holding frame 12 has completed its backward movement, the cylindrical caser 1 moves back to the lower retracting roller belt 3' due to the retraction of the swing cylinder 11.
As a result, the rear end (perforation cut part) of the enveloped tube B is pulled out from the open core 2 and lowered.
The rear end rests on an impulse seal blade 25 that protrudes from the slope line by a height approximately half the thickness of the envelope tube.

After the cylindrical caser 1 and the envelope tube B are lowered, the seal cylinder 24 is moved to a position facing the impulse seal blade 25 by the operation of the lower moving cylinder 22, and at the same time as the movement is completed, the seal cylinder 24 is inserted through the impulse seal blade 25, Seal cylinder 24 is lowered. As a result, the rear end of the enveloped tube i is sealed at approximately the center of the tube (thickness of the tube (thickness of the caser)) as shown in Fig. 3, and a bottom seal portion C with a good appearance suitable for packaging is formed. . After the time has elapsed, the seal cylinder 24 rises and waits for the stacked half-folded product A to be introduced.

When the laminated half-folded product A slides out from the chute 50, the feed belts 5, 5 accelerate and advance the laminated half-folded product A. In front of this, an enlarged rear end opening 10 of the downwardly inclined cylindrical caser 1 opens, so that the laminated half-folded product A smoothly passes through the cylindrical caser 1, and the tip is encapsulated. It hits the bottom seal part 0 of tube d and stops. The laminated half-folded bag is squeezed from above and below by a feeding belt 5°5' and held in this state inside a thin cylindrical caser 1, so that tight packaging can be performed without bending.

The introduction of laminated folded bags is detected by placing phototubes above and below the feed belt 5゜5', and a signal is sent to the lifting cylinder 26 via a timer, which causes the caser discharge lower roller 23 to rise. and lower moving frame 1
The envelope tube d is sandwiched between the caser discharge upper roller 28 attached to the caser 7 and the caser discharge upper roller 28 attached to the caser 7. Caser discharge lower roller 2
As the envelope tube B is pushed up by the rise of 3',
The leaf spring or hinge 9 fixing the cylindrical caser 1 is slightly warped as shown in FIG.

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 envelope tube d and the laminated half-folded product A charged therein are simultaneously moved inside and outside the cylindrical caser 1. It is extracted and discharged.

The envelope tube B containing the laminated half-folded product slides on the discharge chute 27 at a level lowered by half its thickness and reaches the stopper 30 for adjusting the position of the inlet seal facing the front end. It hits and stops.

As a result, the tube opening that had been surrounding the distal end of the cylindrical caser 1 of the enveloped tube layer passes between the caser discharge upper roller 23 and the caser discharge lower roller 23', and the upper surface of the impulse seal blade 25 Stops at the seal position. Upon hitting the stopper 30, the detection device 32
A signal is sent to the swinging cylinder 11, and its operation causes the cylindrical caser 1 to rise together with the lower feeding roller peltoy about the swinging shaft 61, and the upper feeding roller belt 3 comes into contact with the top surface of the cylindrical caser 1. , prepare 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, the impulse seal blade 25 is energized again and the seal cylinder 24 is lowered, so that the inlet opening of the envelope tube i is sealed with the cut edges evenly aligned at approximately the center of its height, and an artificial seal portion d is formed. The purpose of packaging is C.

In this process, the laminated half-folded bags A hit one end (bottom seal part) of the enveloped tube B and remains packaged, so the cut of the entrance opening of the enveloped tube B Moreover, since the laminated half-folded bags A stops at a lower level than the impulse seal blade 25, the laminated half-folded bags A may be accidentally sealed together with the entrance opening of the envelope tube B. There is no danger of being exposed.

After the seal time-up, the 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 thus obtained packaged C is then passed through the discharge chute 27.
is raised from a downwardly inclined state to a horizontal state by the elevating cylinder 28, and is sandwiched from above and below by the ejection rollers 31 and 31'ζ, and the fixed shooter 38 is rotated by this.
The products are discharged to a container and boxed appropriately, and the entire process is completed, and the packaging is automatically performed by repeating each of the above steps.

In the case of the present invention, the cylindrical caser 1 not only functions as a simple loading member, but also works together with the open-mouthed core 2 as a means for shaping the envelope tube into a state that closely approximates the dimensions of the packaged object. It also functions as a means for holding the packaged items in a tightly laminated state without losing their shape, and also functions as a means for simultaneously discharging the wrapped tube and the packaged items at the same time. Therefore, a collection of weak films can be tightly packaged in a bag of the minimum required size.

(Effects of the Invention) According to the first aspect of the present invention described above, an endless tube is used to efficiently and reliably transport slippery and weak articles such as polyethylene laminated half-fold bags.
The folding device according to the second invention is capable of stable and tight packaging, and has a simple and compact mechanism, making it suitable for placement on the exit side of an automatic folding machine or for being integrated with the automatic folding machine. An excellent effect can be obtained in that the device can be provided.

[Brief explanation of drawings]

FIGS. 1(a) to (d) are explanatory diagrams showing step-by-step an embodiment of the tube packaging method according to the present invention, and FIG. 2 is a longitudinal sectional side view showing an embodiment of the tube packaging apparatus according to the present invention. Third
This figure is a perspective view showing the connection between the cylindrical caser and the feed belt in FIG. 2. 1... Cylindrical caser 12... Center-open core, 3゜3'
... Feeding roller label 1-14, 4... Feeding roller (bell l-), 10... Expanded opening, 11...
Tip opening, 15... Perforated cylinder, 25... Impulse seal blade.

Claims (2)

[Claims] (1) The process of connecting the open-mouthed core to the tip opening of the cylindrical caser, and feeding out the endless tube through the open-mouthed core until it covers the outer surface of the cylindrical caser, and cutting the tube on the open-mouthed core side. The process of making a bottom seal, the process of inserting the packaged items through the rear end opening of the cylindrical caser, and the process of removing the tube with the bottom seal along with the packaged items from the cylindrical caser and sealing the remaining one side are performed in sequence. A tube packaging method characterized by repeating. (2) A swingable cylindrical caser having a means for accelerating and feeding a desired packaged object such as laminated and half-folded bags, and a widening opening communicating with the conveying means at the rear end; It is equipped with a retracting roller belt that pinches the upper and lower surfaces of the cylindrical caser and forwards the tube, and has a cross-sectional area equal to or larger than the tip opening of the cylindrical caser, and is arranged so as to be able to come into contact with and separate from this at the oscillating position of the cylindrical caser. a cylindrical caser, a tube forward feeding means disposed above and below the open core, a perforation providing means provided between the tube supply mechanism and the open core, and a cylindrical caser. and a sealing means disposed near the lowered position of the tube packaging device.