JPS6013762Y2 - Film side seal device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a side sealing device that continuously seals the side edges of a strip-shaped packaging film in the longitudinal direction.

Four-side seal packaging is performed by a packaging device as shown in Fig. 1. To explain the outline, 1 is a packaging film, and this packaging film 1 is fed out from material rolls 2 provided above and below by a roller. 3 and 4, and is top-sealed in the width direction of the film by horizontal sealers 5 and 6 at positions where the leading ends 1A of each film 1 come into contact with each other.

The horizontal sealers 5 and 6 move up and down as shown by the arrows, and repeatedly approach and move away from the film 1.

Four-sided seal packaging is usually used when multiple items are packaged in one package, and the objects to be packaged 8 are grouped together by a supply belt 9 and the film 1 has already been top-sealed at the leading end. Pushed inside.

When the top seal 7 is completed, the horizontal sealer 5.6 separates vertically, and both the film 1 and the packaged object 8 move in the direction of the arrow.

Then, the both side edges IC and ID of the film 1 are pinched by the upper and lower feed belts 10.11 and 30.31, so the film 1 is transferred while being held by these feed belts, and during this transfer, side seal device 12,
13, side edges of the packaging film 1 are side-sealed 14 and 15 in the longitudinal direction.

Furthermore, if the rear end IB of the film is end-sealed 16 with the horizontal sealers 5 and 6 and cut with the built-in cutter, all four sides of the film will be sealed as shown in FIG. ,14,1
5 and 16, the packaged object 8 is completely sealed on all four sides.

The present invention provides a side sealing device for a packaging film, which is particularly aimed at ensuring reliable and complete side sealing when carrying out such four-sided seal packaging.

In this invention, when the packaging film is side-sealed by the side sealing device while it is being transported while being held between the upper and lower feed belts guided by the belt groove of the drive roller, the contact part of the upper and lower sealing rollers is To provide a side sealing device for a film, characterized in that the film transported by a feeding belt is side-sealed in a mountain-shaped state by being shifted upward with respect to a contact portion of the belt.

An embodiment of the present invention will be explained based on the drawings. Fig. 3 is a front view showing a side sealing device for a film of the present invention, in which both side edges IC and ID of the packaging film 1 are provided with 8 Book feeding belt 10A, IOB and IIA,
IIB and 30At30B and 31A, 31B, and four upper belts IOA, IOB and 30A, 3
0B are upper drive rollers 21, 22 and 25, 26, and four lower belts IIA, IIB and 31A, 31B.
indicates that the film 1 is moved in the direction of the arrow by being driven by the lower drive rollers 23, 24 and 27, 28.

The upper feed belts IOA and IOB, which hold one side edge IC of the film 1, are stretched by two belt grooves 29 provided in the upper drive roller 21 and 22, and the lower feed belt 11A .

11B is stretched by two belt grooves 29 provided on the lower drive rollers 23 and 24, so when the upper and lower drive rollers rotate, the upper and lower feed belts IOA and IOB
, and IIA and IIB are rotating in a circular manner as shown by the arrows.

Furthermore, the upper feed belts 30A and 30B that hold the other side edge ID of the film are connected to the upper drive rollers 25 and 2.
The lower feed belts 31A and 31B are stretched by two belt grooves 29 provided in the lower drive roller 27.
, 2B, and when the upper and lower drive rollers rotate, the film 1 is moved in the direction of the arrow in synchronization with the above-mentioned feed belt.

Since these feed belts are affected by the heat generated by the side seal rollers, it is preferable to use spring belts with excellent heat resistance.

The film 1 is transported in the direction of the arrow, and both edges IC and ID of the film are connected to the upper and lower feed belts 10A and 11A, IOB and IIB, and 30A and 31A at the contact points X between drive rollers 21 and 23 and 25 and 27. and 30B and 31
B, and the seal rollers 12, 13 and 3
The side seals 14, 15 are formed at the contact point Y between 2 and 33, and released from the belt 10, 11 at the contact point 2 between the drive rollers 22 and 24 and 26 and 28.

With respect to the contact portion Y of the side seal, the contact portions X and Z of the drive roller (contact portions of the upper and lower feed belts) are shifted upward by a distance a.

Thereafter, the end seal 16 is also performed to complete the four-way seal, and the product is discharged as a product 18 by the product feed belt 17.

FIG. 5 is a side view showing the positional relationship between the contact portion of the film feed belt and the contact portion of the side seal roller in the side seal device, showing the seal roller 12, 13 that side seals one side edge IC of the film 1; contact portion 40 and contact portion 41 with film feed belt 10.11, and contact portion 42 with seal roller 32.33 side sealing the other film side edge ID and contact portion with film feed belt 30.31. The positional relationship of 43 is shown.

Film feed belt IOA, IIA and 10B, IIB
Also, the contact portions 41.43 where 3OA, 31A and 30B, 31B are in contact are provided on the same horizontal line, whereas the side seal rollers 12, 13 and 32, 33 are in contact with each other.
The contact portions 40, 42 of are offset above the contact portions 41, 43 of the film transport belt by an amount a.

Therefore, as shown in the figure, the film 1 is formed into a mountain shape when it is sealed.In other words, the film 1 is sealed in a stretched state, so that an extremely good seal can be achieved.

A heater 19 is built into the upper sealing rollers 12 and 32, and the temperature of this heater 19 is controlled to an optimum sealing temperature depending on the material of the film 1.

Since the lower sealing rollers 13 and 33 are in pressure contact with the upper sealing roller and rotating, the film side edge IC is sealed 14 by the sealing rollers 12 and 13, and the other film side edge ID is sealed by the sealing roller 32. , 33 to seal 15.

The present invention is a side sealing device having the above-mentioned configuration, and when performing four-side seal packaging, when the side edges of the film are continuously sealed in the longitudinal direction, the side edges of the film are attached to the upper and lower feed belts. A good, uniform and beautiful seal can now be obtained by guiding and feeding the film to the side sealing device while holding it in place, and forcibly forming the film into a mountain shape during sealing.

[Brief explanation of the drawing]

Figure 1 is a front view schematically showing a four-sided seal packaging device;
The figure is a plan view showing the form of four-sided seal packaging, Figure 3 is a front view of the film feeding device of the present invention, Figure 4 is a side view of the same, and Figure 5 is a diagram showing the side seal roller and film feeding belt of the present invention. FIG. 3 is a side view showing related positions. In the drawings, 1 is a packaging film, 1C9ID is a side edge of the film, 8 is an object to be packaged, 10, 11.30 and 3
1 is the film feed belt, 12.13, 32 and 33
is the side seal roller, 14.15 is the side seal, 2
1.22 is the upper drive roller, 23 and 24 are the lower end drive rollers, 29 is the belt i of the drive roller, 40.42 is the contact portion of the seal roller, and 41.43 is the contact portion of the feed belt.

Claims (1)

[Scope of utility model registration request] In a side sealing device that continuously seals the side edges IC and ID of a packaging film 1 in the longitudinal direction, sealing rollers 12 and 32 having a built-in heater 19 and a seal that is in pressure contact with the sealing rollers 12 and 32 are used. Roller 13.33
a side sealing device that is combined with a side sealing device, and four upper feed belts 10A, 10B, and 30A that guide and supply the side edge portions IC and ID of the packaging film to this side sealing device.
, 30B, and four lower feeding belts IIA, 11B and 31A, 31B, and the upper feeding belt IOA,
IOB, 30A, 30B are driven while being guided by belt grooves 29 of drive rollers 21, 22, 25, 26, and lower feed belts IIA, IIB, 31A, 31B are driven by belts of drive rollers 23, 24, 27, 28. Groove 29
A seal roller is disposed in the middle of the upper and lower drive rollers, and a seal roller is provided at the contact portion 41, 43 of the upper and lower feed belts stretched between the upper and lower drive rollers. On the other hand, the contact portion 40 of the seal roller.
A film side sealing device characterized in that 42 is disposed offset upward.