JPH0547449B2 - - Google Patents

Description

[Detailed Description of the Invention] <<Industrial Application Field>> This invention relates to a four-sided seal packaging device, and more specifically, to a packaging device for producing a package whose side edges are melt-sealed. This invention relates to improvements in side seal means.

<<Prior Art>> Conventionally, as shown in FIG. 10, for example, there is a package a whose left and right end portions are melt-sealed (there is no seal width). In such a package a,
Normally, a thin rod-shaped article such as a sharp pencil or ballpoint pen is inserted as the packaged item b, and
A transparent film is used to make the packaged item b visible from the outside.

In order to manufacture this type of package, first, a large number of bags are manufactured using a bag-making apparatus, with both side end portions being melt-sealed and the top end being open. On the other hand, the item to be packaged is manufactured in a separate manufacturing process from that of the bag. After a predetermined amount of the article to be packaged is manually inserted into the bag manufactured above, the upper opening of the bag is sealed to form the package a.
is manufactured.

In addition, when manufacturing the above-mentioned bag with an open top, the fusing sealing of both ends is performed, for example, in
This is carried out using an impulse sealer or the like used in JP-A-60-217911, etc.

<<Problem to be solved by the invention>> As mentioned above, in the conventional packaging apparatus, the work of inserting the packaged object b into the bag was performed manually, which resulted in poor manufacturing efficiency and the inability to perform mass production. Ta.

In addition, since the impulse sealer was used for fusing sealing, its structure required that the sealer be cooled for a certain period of time after it was heated to fuse the film, and as a result, the sealing process was inevitably delayed. This resulted in intermittent drive, which affected productivity.

In order to solve this problem, for example,
It is possible to use a pair of upper and lower rotary sealers with a very narrow width, which is used as the side seal device of a normal four-sided seal device (the side seal part consists of a band shape of a predetermined width) shown in No. 152069 etc. It is possible, but simply narrowing the width will
Again, continuous fusing sealing is not possible for the reasons described below.

That is, in order to fuse and seal, both rotary sealers are at a high temperature (compared to normal heat sealing), and when the strip film is cut, both films are completely melted and the upper and lower rotary sealers are cut. His face was covered in tears. Therefore,
When the rotary sealer is continuously driven to rotate, the fused film strip must pass through it before being completely cooled and solidified, and as it passes, the upper film strip passes through the upper rotary sealer and the lower The film strip tries to stick to the rotating sealer below. In other words, the film strip as a whole tries to move forward, but when passing through the side sealing device, the upper and lower film strips are subjected to a force that tries to move them up and down and away from the rotating sealer they are in contact with as they rotate. The force creates stress on the joint surfaces of both films that tend to separate them, making it impossible to reliably and cleanly fuse the films, and in the worst case, there is a risk that an unsealed portion may occur.

This invention was made in view of the above-mentioned problems, and its purpose is to be able to automatically manufacture a package whose side edges are reliably melt-sealed, thereby improving productivity. An object of the present invention is to provide a four-sided seal packaging device that can improve the performance.

<<Means for Solving the Problems>> In order to achieve the above-mentioned object, in the four-side seal packaging device according to the present invention, the side sealing means includes a pair of side sealing means capable of sandwiching the overlapping ends of the strip film from above and below and sealing them by melting. A disc-shaped fusing sealer was provided, and one of the pair of fusing sealers was set to have a higher film heating temperature than the other. Then, a peeling plate is placed near the discharge side of the one fusing sealer set at the high temperature and at a position where it can come into contact with the surface of the strip film on the side of the one fusing sealer set to the high temperature. Established.

<<Operation>> The side edges of the two superposed film strips are sandwiched from above and below by a pair of fusing sealers. When the strip-shaped film passes through the pair of sealers, it is heated and cut by the sealers.

Here, when paying attention to the time of fusing, the pair of fusing sealers have a height difference in temperature, so of the two band-shaped films that are fused and integrated, the band on the side of the fusing sealer, which is at a relatively low temperature, Since the bonding strength of the film with other strip-shaped films is stronger (because of the high temperature), the film easily and smoothly separates from the fusing sealer.

On the other hand, the band-shaped film on the side of the fusing sealer set at a high temperature tries to stick to the fusing sealer for the reason mentioned above, but its surface comes into contact with the peeling plate, and it is guided by the peeling plate and is easily fused. Separate from Sheila.

Therefore, no unreasonable force (stress) is applied to both strip-like films when they pass through the side sealing means, and the films pass through in a cleanly fused state. The fused portion after passing through is cooled and solidified during subsequent transportation to become a strong seal.

<<Example>> Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

FIG. 1 and FIG. 2 show an embodiment of the packaging device according to the present invention, and to explain its schematic configuration, a supply conveyor device that conveys a thin rod-shaped packaged object 1 such as a ballpoint pen at predetermined intervals. 2, a film transport device 3 disposed substantially on the same line on the discharge end side of the supply conveyor device 2, and a film transport device 3 disposed on the discharge end side of the supply conveyor device 2.
and a film feeding device 4 capable of continuously feeding two strip-shaped films.

Next, each part will be described in detail. The supply conveyor device 2 forwardly transports a plurality of (three in this embodiment) packages 1 in a horizontal row at a predetermined distance apart. The article to be packaged 1 is conveyed from behind by pushing fingers 7 arranged at predetermined intervals on an endless chain 6 extending between a pair of front and rear sprockets 5. Guide plates 8, 8 each having a tapered tip are arranged on both sides near the discharge end side, and guide plates 8, 8 with tapered ends are arranged to guide the parallel packages 1 conveyed on the supply conveyor device 2 from side to side. After the two are brought into contact with each other, the film is transferred to the film transport device 3 side.

Furthermore, in this embodiment, an attitude alignment device 10 shown in FIG. 3 is connected to the rear side of the supply conveyor device 2 in the direction of movement. This posture alignment device 10 is for aligning a clip portion 1a (see FIG. 4) made of synthetic resin or the like disposed on a ballpoint pen, which is an object to be packaged 1, in a certain direction. It is composed of a belt conveyor 11 that moves in a direction perpendicular to the conveyance direction of the packaged object, and a guide member 12 having a substantially trapezoidal cross section and disposed near the upper part of the belt conveyor 11 along the direction of movement of the packaged object 1. ing. A magnet 12a is embedded in the slope side of this guide member 12. That is, when the packaged object 1 passes on the belt conveyor 11,
As shown in FIG. 5, a counterclockwise rotational force is applied, and the packaged object 1 is rotated by this force. Then, the clip portion 1a of the article to be packaged 1 is attached to the inclined surface of the guide member 12 (or the belt conveyor 11
The rotation is stopped by contacting the belt surface), and the clip portion 1a is thereby oriented in a fixed direction. The reason why the magnet 12a is provided on the inclined surface of the guide member 12 as described above is because when the clip portion 1a is made of metal as shown in FIG. 4B, the wall thickness thereof is usually thin. Since the rotation is not restricted only by contact with the member 12, etc., the clip portion 1a is attracted by the magnetic force of the magnet 12a as shown in the figure, thereby aligning the posture.

In addition, the reference numeral 14 in FIG. 3 indicates the belt conveyor 1.
This is a driving means for forwardly transporting the packaged object 1 located on the packaged article 1 .

On the other hand, the film supply device 3 supplies a raw film 15 disposed above the discharge end of the supply conveyor device 2.
and a plurality of rollers 1 that continuously pull out a relatively wide strip film 16 from the original film 15.
7, and a cutting blade 18 disposed in the middle of drawing out the strip film 16. And cutting blade 1
At step 8, the strip-shaped film 16 is cut into two pieces from its center, and one of the cut pieces moves directly onto the film conveying device 3 and becomes the upper film 20. The other film once moves downward, and its course is changed to a predetermined direction via a direction changing device having a substantially triangular film direction changing plate member 21 disposed below, so that it overlaps with the upper film 20. The lower film 22 then moves along the film transport device 3. and,
The article to be packaged 1 conveyed by the above-mentioned supply conveyor device 2 is placed between the above-mentioned upper and lower films 20 and 22.
They are arranged to be inserted at predetermined intervals between them. Note that the direction changing device specifically has a structure shown in FIG. 6.

Furthermore, the film conveying device 3 forwardly transports the packaged object 1 with the upper and lower films 20 and 22 sandwiching it from above and below, and seals and cuts predetermined positions of both films 20 and 22 during the transport. The film transport device 3 is used to manufacture packaging bodies.
The upper and lower films 2 are placed near the loading end of the
A pair of upper and lower tension rollers 23 and 23 are disposed to sandwich both ends of the rollers 0 and 22 from above and below.
The tension rollers 23, 23 are arranged so as to slightly expand toward the front in the direction of travel, so that the upper and lower films 20, 22 can travel in a taut state. It's summery.

Further, in front of the tension rollers 23, 23 in the direction of movement, there is a fusing sealing device which is a side sealing means capable of continuously fusing and sealing both sides of both the films 20, 22, which is an essential part of the present invention. 2
4 (detailed configuration will be described later) are provided.

A pair of upper and lower guide rollers 25, 25 are provided in front of the fusing sealing device 24 in the traveling direction for removing both side edge portions of the upper and lower films 20, 22 cut by the fusing sealing device 24. Further, conveyor belts 27, 27 are disposed in front of the upper and lower films 20, 22 so as to sandwich the upper and lower films 20, 22 from above and below. By rotationally driving the conveyor belts 27, 27, the upper and lower films 20, 22 and the packaged object 1 inserted between the two films are transported forward.

Further, in front of the conveyor belt 27 in the traveling direction, there is a packaged object 1 of the upper and lower films 20 and 22.
An end seal device 28 for sealing and cutting the gaps in the lateral direction is provided, and the end seal device 2
The package 29 (specifically, see FIG. 10) cut at 8 and formed is further carried out by a carry-out conveyor device 30 disposed in front of the package 29 in the direction of movement.

Here, to explain the specific structure of the above-mentioned fusing seal device 24, as shown in enlarged form in FIG. 7 and FIG. are arranged vertically facing each other. The upper fusing sealer 31 is heated to a relatively high temperature, whereas the lower fusing sealer 32 is set at a lower temperature. Furthermore, both fusing sealers 3
1 and 32 are both movable in the vertical direction, and can be separated from each other when not performing sealing work.

Next, the drive mechanism for rotating and vertically moving these fusing sealers 31 and 32 will be described in detail.
First, two first rotating shafts 35 are vertically rotatably installed between a pair of main body frames 33, 33 which are arranged upright on the sides of the upper and lower films 20, 22. And those two first rotating shafts 35, 35
First gears 36, 36 are respectively fixed to the first gears 36, 36, and both the first gears 36, 36 are in mesh with each other. Further, a drive sprocket 37 connected to a drive source (not shown) is integrally attached to the lower first gear 36. That is, by operating the drive source (not shown), both first rotating shafts 35, 35 are rotated in synchronization with each other in a predetermined direction. On the other hand, each of the first rotating shafts 35, 35 has a substantially rectangular parallelepiped-shaped mounting body 4.
0, 40 is rotatably inserted, and a second
A gear 42 is fixed. The second gears 42 are arranged coaxially with the first rotating shaft 35, and both second gears 42 are in mesh with each other. Furthermore, the second gear 4 located on the lower side
One end of an elongated actuating rod 43 is pivotally attached to the side surface of the second gear, and by expanding and contracting a cylinder (not shown) connected to the other end of the actuating rod 43, the second gears 42, 42 and the mounting body 40, 40
is adapted to be oscillated about the first rotating shaft 35 as a fulcrum. Further, a second rotating shaft 44 is rotatably inserted into the tip portions of the mounting bodies 40. The above-described fusing sealers 31 and 32 are fixed to one end of the second rotating shaft 44, and a third gear 45 is fixed to the other end of the second rotating shaft 44.
is fixed, and the third gear 45
is meshed with the first gear 36 mentioned above. As a result, the rotational force transmitted to the drive sprocket 37 is transmitted to each of the fusing sealers 31 and 32 via the first gear 36, the third gear 45, and the second rotating shaft 44, and the sealers 31 and 32 are driven to rotate. Further, both fusing sealers 31 and 32 are configured to move in the vertical direction (move forward and backward relative to the upper and lower films 20 and 22) as the mounting bodies 40 and 40 attached thereto swing. It's summery.

Further, a strip-shaped peeling plate 47 that slopes upward is disposed near the front of the high-temperature upper welding sealer 31 in the direction of movement. This peeling plate 47 is
This serves to prevent the upper and lower films 20 and 22, which have been melted and have not yet been completely cooled and are in a molten state, from sticking to the upper melt sealer 31.

Next, the operation of the above-described embodiment will be described. The articles 1 to be packaged are conveyed on the supply conveyor device 2 at predetermined intervals, aligned in a predetermined direction. On the other hand, in the film supply device 4, the two upper and lower films 20 and 22 are stacked vertically at a position near the discharge end of the supply conveyor device 2. At this time, the object to be packaged 1 is transferred between the two films from the supply conveyor device 2 at the superposition point, and thereafter the lower film 22, the object to be packaged 1 and the upper film 2
The film is transported on the film transport device 3 while being stacked in the order of 0.

Then, during the transfer, both side edges of the upper and lower films 20 and 22 are continuously melt-sealed (side-sealed) by a melt-sealing device 24 to form a cylindrical film with no seal width. Note that at this time, the fused and cut film portion is discharged via a guide roller.

By the way, at the time of fusing sealing, the lower fusing sealer 3
Since the temperature of the lower film 22 is low, the bonding strength of the lower film 22 with the upper film 20 due to melting is stronger, so the lower film 22 is smoothly separated from the lower melt sealer 32, while the upper film 20 is The peeling plate 47 guides the upper film 20 in the vicinity of the upper fusing sealer 31, so that the upper film 20 also does not stick to the upper fusing sealer 31. Therefore, an unreasonable force is not applied to the film, and as shown in FIG. 9, a cleanly fused sealed end can be obtained.

Then, the cylindrical film formed in the above process is further transported forward, and the end sealing device 2
At step 8, the package 29 is cut while being sealed in the transverse direction at predetermined intervals.

In the above-mentioned embodiment, an example was explained in which a plurality of thin rod-shaped objects were used as the packaged object, but the present invention is not limited to this, and can be applied to various shapes and numbers (for example, flat rod-shaped objects, etc.). It can be applied to objects (such as one piece of paper).

<<Effects of the Invention>> As described above, in the four-side seal packaging device according to the present invention, the packaging body having a shape in which the sides of the bag are melt-sealed is manufactured by inserting the packaged object at the same time. Since the product is wrapped, the packaging work is automated and productivity is improved.

Furthermore, since the temperature of the upper and lower disc-shaped fusing sealers is changed and a peeling plate is provided on the high temperature side, the strip-shaped film that has been fusing by the pair of fusing sealers can be easily and smoothly separated from the fusing sealers when passing through. Therefore, reliable and clean fusing sealing can be performed continuously, and productivity can be further improved.

[Brief explanation of the drawing]

1 and 2 are views showing a preferred embodiment of a four-sided seal packaging device according to the present invention, FIG. 3 is a view showing a posture alignment device, and FIG. 4 is a view showing an example of an object to be packaged, FIG. 5 is a diagram explaining the action of the posture alignment device;
FIG. 6 is a perspective view showing the schematic configuration of the direction changing device;
Figures 7 and 8 are diagrams showing the fusing sealing device which is the main part of the present invention, Figure 9 is a partially enlarged view showing the state of the fused film, and Figure 10 is a plan view showing the package. be. 1... Item to be packaged, 2... Supply conveyor device, 3
. . . Film conveyance device, 4 . . . Film supply device, 20 . (high temperature side), 32...Fuse sealer (low temperature side), 47...Peeling plate.

Claims (1)

[Scope of Claims] 1. Means for supplying an object to be packaged at predetermined intervals between two upper and lower film strips that are continuously conveyed, and side seals that apply side seals to both overlapping ends of the film strips in the traveling direction. and a means disposed in front of the side sealing means in a traveling direction for sealing and cutting the strip-shaped film between each of the objects to be packaged in the transverse direction, wherein the side-sealing means It has a pair of disc-shaped fusing sealers capable of sandwiching and fusing-sealing the overlapping ends of the film from above and below, and one of the pair of fusing sealers is set to have a higher film heating temperature than the other. is,
Furthermore, the four-sided seal is characterized in that a peeling plate that can come into contact with the surface of the strip-shaped film on the one of the fusing sealers is provided at a position near the discharge side of the one fusing sealer that is set at a high temperature. packaging equipment.