JPH03226410A - Sealing and packing of seat material - Google Patents

Abstract

PURPOSE:To decrease area necessary for film packing material by putting a seat material with the front end edge and interior edge in intimate contact with the film packing material and adhering the film packing material outside the rear end edge and exterior side edge to seal and pack the seat material. CONSTITUTION:Packing material 10 is placed with a bending edge 12 in contact with a guide member 50 and sent forwards while being held by a belt conveyor 30, and a front end adhering part 16 is formed. A vacuum sucking pad 40 suck and lifts up the upper surface side piece of the material 10 so as to insert a seat material S between the upper and lower surface side pieces. The front end edge of the seat material S is brought into contact with the inside of the front end adhering part 16 of the material 10, while the interior side edge of the seat material S is brought into contact with the inner surface of a bending edge 12. The material 10 is sent on a belt conveyor 70 and cut off after a rear end adhering part 17 is formed by a sealing and cutting mechanism 60. On the belt conveyor 70, the bending edge 12 is brought into contact with a guide member 52, a sealing mechanism 65 is pressed on the upper surface of the exterior side of the material 10 and adhered by melting method to form an exterior side adhering part 18.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a seal packaging method for sheet materials, and more specifically, after wrapping a rectangular sheet-shaped material to be packaged in a film-shaped packaging material, this film The present invention relates to a method of sealing and packaging a sheet material in a film packaging material by joining the opening portion of the packaging material by heat sealing or the like.

[Conventional technology]

Conventionally, in order to seal-pack sheet materials with film packaging materials, two sheets of film packaging materials are placed on both the top and bottom surfaces of the sheet material, and then the top and bottom film packaging materials are joined together on the outside of the four sides of the sheet material. The sheet material is enclosed and packaged. As a means for joining film packaging materials, a so-called heat sealing method is generally employed, in which a heating member is pressed against the film packaging material from above to heat and weld the upper and lower film packaging materials together.

Alternatively, there is a method in which the film packaging material is folded in half, a sheet material is inserted into the gap, and the film packaging material is joined only on the outside of the three sides of the sheet material. In this method, since one side of the sheet material is covered by the folded side of the film packaging material, part of the work of joining the film packaging material can be omitted.

[Problems to be Solved by the Invention] However, the conventional seal packaging method described above requires a film packaging material that is considerably larger than the sheet material, resulting in wasted film packaging material and is bulky in the packaged state. There was a problem.

In other words, with the sheet material wrapped in a film packaging material,
When joining film packaging materials by heat sealing on the outside of the four or three sides of the sheet material, for example, if the heating member for heat sealing comes into contact with the sheet material, there is a risk that the sheet material will be adversely affected by heat or pressure. Because of this, heat-sealing was performed at a position quite far away from the outer shape of the sheet material. In particular, when mechanizing or automating packaging work, it is necessary to take into account dimensional errors in the sheet material and operating errors of the machine. It was set to the same state. Specifically, the outer dimensions of the film packaging material are usually 3 to 4 cm relative to the outer dimensions of the sheet material, with sufficient space between the outer periphery of the four sides of the sheet material and each joint. It was set to be large. As a result, the area required for the film packaging material is considerably larger than the area of the sheet material, resulting in waste of film packaging material, and the need to transport and store sheet materials wrapped in such a large film packaging material. This requires a large amount of space and increases the labor involved in handling it. In addition, if there is a large gap between the sheet material and the film packaging material, the sheet material can move freely inside the film packaging material, and the position of the sheet material within the film packaging material will vary, making it difficult to handle. There is also a high possibility that the sheet material will be damaged or deformed as it moves inside.

Therefore, as described above, an object of the present invention is to reduce the gap between the outer shape of the sheet material and the joint part of the film packaging material in a method of seal packaging a sheet material with a film packaging material. The objective is to provide a method that can reduce the amount of space required.

[Means to solve the problem]

A seal packaging method for a sheet material according to the present invention that solves the above problems is a method of wrapping a sheet material in a film packaging material, joining the opening of the film packaging material, and enclosing the packaging material. are joined in a direction perpendicular to the folded sides to form a front end joint, and then a rectangular sheet material is inserted into the gap between the film packaging materials, and the front end side of the sheet material is attached to the front end joint of the film packaging material. At the same time, the sheet material is positioned by contacting the folded side of the film packaging material positioned by the guide member with the back side of the sheet material, and then on the outside of the 1 & end sides of the sheet material,
The film packaging material is joined in a direction perpendicular to the folded side to form a rear end joint, and further, with the guide member in contact with the folded side of the film packaging material, the outer side of the front side of the sheet material is The film packaging material is joined in a direction parallel to the folded side.

The sheet material to be packaged by the method of the present invention can be applied to materials to be packaged made of resin, metal, ceramic, glass, or any other arbitrary material. The shape of the sheet material is usually rectangular or rectangular, including a square, and is flat with a constant thickness. It does not matter if the sheet material has uneven or curved parts, protrusions on the surface, or changes in thickness.The thickness of the sheet material can be set arbitrarily, but for example, the thickness of the sheet material can be set to about 1 to 8 pieces. It can be used.

As film packaging materials, film packaging materials made of various synthetic resins that are used in the ordinary packaging field can be used freely, depending on the type of sheet material to be wrapped and the usage environment after packaging. , select and use appropriate materials.

In addition, depending on the joining means of the film packaging material, for example,
If heat sealing is required, a heat-fusible film is used, or if adhesive or adhesive is used, a film with good adhesiveness or adhesiveness is used. As a film packaging material, it is also possible to use a film on which an adhesive layer or a pressure-sensitive adhesive layer is laminated in advance.

The film packaging material is used by folding one flat film packaging material in two and stacking them on top of each other. The film packaging material may be folded into two in a process separate from the packaging process, such as by folding a long film in advance and winding it into a roll, or it may be folded in two in a process separate from the packaging process, or it can be folded in two in a process separate from the packaging process. In this case, the flat film packaging material may be folded in half and then the sheet material may be wrapped.

The film packaging material folded in half is fed to the packaging process using a conventional conveyance means such as a held conveyor. At this time, if a suction held conveyor is used to transport the film packaging material while holding the surface thereof by suction, the film packaging material can be fed reliably and the film packaging material can be accurately positioned in the packaging process.

As a means of forming a front end joint in a film packaging material,
Various joining means employed in ordinary seal packaging methods can be used. Specifically, the most common method is heat sealing, in which a heating member is pressed against the film packaging material folded in half to thermally weld the packaging material, but it is also possible to join the film packaging material by adhesion or adhesive.

To insert a sheet material into the gap between folded film packaging materials, you can simply push the sheet material, but if you widen the gap between the film packaging materials in advance and then insert the sheet material, it will be easier to insert the sheet material. It's easy. As a means of widening the gap between the film packaging materials, it is sufficient to hold one or both pieces of the stacked film packaging materials with a suitable support and widen them. The material handling mechanism can be used. For example, if the surface of the film packaging material is held by suction with a vacuum suction band, and the vacuum suction band is moved to pull one piece of the film packaging material apart to widen the gap between it and the other piece,
You can reliably widen the gap without damaging the film packaging material.It is easier to perform the wrapping work by inserting the sheet material so that the long sides of the sheet material are in contact with the two folded sides of the film packaging material. It is also possible to insert it so as to abut the front end joint of the packaging material.

The guide member for positioning the folded side of the film packaging material may have a shape that allows it to abut linearly along the folded side. If the guide member is provided so as to be movable in the direction orthogonal to the folded side, the guide member can be brought into contact with or separated from the folded side as necessary, and the set position of the folded part can be changed. You can also do that. The guide member can be moved using a normal operating mechanism such as an electromagnetic cylinder.

The joining means for forming the rear end joint of the film packaging material can be the same as the joining means for the front end joint. For example, after forming a front end joint on a film wrapping material using a joining mechanism installed in a fixed position, if the film wrapping material and sheet material are advanced a certain distance and then the same joining mechanism is activated, the sheet material A trailing edge joint can be formed on the outside of the trailing edge. At this time, the distance between the front end joint and the rear end joint formed on the film packaging material is set based on the moving distance of the film packaging material and the sheet material. It is preferable to set the gap between the rear end side of the sheet material and the rear end joint part as little as possible while the front end side of the sheet material is in contact with the front end joint part. However, if the packaging work is mechanized or automated, the minimum necessary gap should be left in consideration of dimensional errors in the sheet material, operating errors in each mechanism, etc. Specifically, a gap of about 151 at most is sufficient. In addition, it is also possible to provide separate joining mechanisms for joining the front end joint and rear end joint of the film packaging material, and set the installation interval of each joining mechanism according to the length of the sheet material. . In this case, the sheet material and film wrapping material do not need to be moved.

If the film packaging material is a long piece, after the rear end joint is formed, the film packaging material can be separated into individual sheets by cutting the long film packaging material outside the rear end joint. be able to. As a means of cutting film packaging materials,
An ordinary cutting blade can be used. If the heating member serving as the joining means is equipped with a heat cutter that cuts the film packaging material with heat/85, the long J-shaped film can be cut at the same time as the rear end joint is formed. The packaging material can be cut and separated. However, before cutting and separating the long film packaging material, it is also possible to arrange multiple sheet materials in a row, each individually sealed. . centre.

A cutting mechanism is not necessary if a material that has been cut into the fifth length of one sheet is used as the lume packaging material.

Among the film packaging materials, the means 2 for joining the outside of the front side C of the sheet material in a direction parallel to the folded side has the same structure as the joining means of the front end joining part and the rear end joining part. is used. At this time, the guide member that comes into contact with the folded side of the film packaging material is the same as the guide member used in the above-described sheet material insertion step CJ. If the film packaging material and the sheet material are moved to join the rear end joint portion, guide members may be provided separately at the C position. The guide member may be moved along with the movement of the film packaging material and the sheet material. The same guide member can be used if the film wrapping material and sheet material are not moved.

[For production]

After forming a front edge joint in a direction perpendicular to the folded side of the film packaging material folded in half, inserting a rectangular sheet material into the gap between the film packaging materials allows the front edge of the sheet material to be aligned with the front edge of the film packaging material. It can be placed in close contact with the joint without any gaps. Furthermore, the back side of the sheet material can be placed in close contact with the folded side of the film packaging material positioned by the guide member without any gaps.

Next, if the film packaging material is joined in a direction perpendicular to the folded side on the outside of the rear end of the sheet material to form a rear end joint, the film packaging material can be joined on the outside of the front and rear ends of the sheet material. Can be joined. At this time, there is a certain amount of gap between the rear end joint and the rear edge of the sheet material, but there is almost no gap between the front end joint and the front edge of the notebook material. , the difference between the total length of the sheet material and the distance between the rear end joints is small. In other words, in the conventional method, a sufficient margin is set for both the front end of the sheet material and the front end joint of the film packaging material, and the rear end of the sheet material and the rear end joint of the film packaging material. However, with the method of the present invention, the gap on at least one side is eliminated, so only half the gap is required. Therefore, the length of the film packaging material required to wrap the sheet material is
The length can be shortened by the length corresponding to the gap on one side.

In addition, when the sheet material is in perfect contact with the front end joint of the film packaging material and is positioned accurately, the trailing edge of the sheet material will naturally also be accurately positioned, so the film packaging material When forming the rear end joint of
It is no longer necessary to set a large gap in consideration of positional errors on the trailing edge of the sheet material, and the gap between the trailing edge of the sheet material and the trailing end joint can also be shortened.

Next, with the guide member in contact with the folded side of the film packaging material, if the film packaging material is joined on the outside of the front side of the sheet material in a direction parallel to the folded side, this front side joint and The sheet material can be enclosed and packaged by surrounding the three sides of the front and rear end joints and the folded part. At this time, the guide member forms the front side joint part with the back side of the sheet material in perfect contact with the folded part of the film packaging material without any gaps, so that even in the width direction of the sheet material, As in the case of the length direction, the gap on at least one side can be reduced, and the width of the film packaging material can be reduced as a result of the accurate positioning of the sheet material and the need for an extra gap between it and the front joint. It's short enough.

As described above, with this invention, it is possible to significantly reduce the gap between the edge of the sheet material and the joint in both the length direction and width direction of the sheet material, and the required area of the film packaging material is greatly reduced. be done.

〔Example〕

Next, embodiments of the present invention will be described in detail below with reference to the drawings.

1 and 2 show the overall structure of a packaging device used in the present invention.

A long film packaging material 10 made of synthetic resin such as polyethylene is wound and held on a roll-shaped winding section 11. The film packaging material IO is folded in half in the width direction, and is either on the opening side or on the front side in Figure 2 (lower side in Figure 1).
It faces either the folded side or the back side in Figure 2 (upper side in Figure 1). Folded film packaging material 1
The width of 0 is set to be slightly thicker than the width of the sheet material S to be packaged.

The film packaging material 1O pulled out from the winding section 11 passes between the pair of upper and lower feed rolls 20.20, and is fed onto the suction heater 730. The suction held conhair 30 has a belt that runs in a fixed direction like a normal conhair, and has a vacuum suction mechanism on the surface of the heddle, so that the articles on the belt are conveyed while being suctioned and held.

A vacuum suction pad 40 that can be raised and lowered is provided above the suction healt converter hair 30.

The vacuum suction pad 40 moves up and down from the upper surface of the film packaging material 10, and is capable of suctioning only the upper surface side piece of the film packaging material IO.

A guide member 50 is provided on the back side of the suction heald conveyor 30 along the running direction. Guide member 5
Both ends in the longitudinal direction of 0 are bent diagonally outward so that they can be smoothly abutted against the folded side 12 of the film packaging material 10 for positioning.

A seal cutting mechanism 60 is provided in front of the suction belt conveyor 30 in the running direction.

The seal cut mechanism 60 is connected to the suction belt conveyor 3.
A pair of upper and lower heating members 61 and 62 perpendicular to the running direction of 0
The upper heating member 62 is movable up and down, and the film packaging material 10 is placed between the upper and lower heating members 61 and 62.
In addition to being able to join by heat welding by sandwiching the film packaging material 10, it is also possible to melt and cut the film packaging material 10. Seal cutting machine +! 60 has a wider width than the film packaging material 10.

In front of the sole force mechanism 60, a belt conveyor 70 is provided.
is provided. This held converter hair 70 is not equipped with a suction mechanism like the suction held converter hair 30 described above.

A guide member 52 is provided on the back side of the belt conveyor 70. This guide member 52 is similar to the guide member 5
0, but the guide member 52 is provided with a cylinder mechanism 54 on the back side, and can freely move back and forth from the back side to the front side in a direction perpendicular to the held controller 70. Belt conveyor 70 facing guide member 52
A sealing mechanism 65 is provided on the front side of the belt conveyor 70 in parallel with the running direction of the belt conveyor 70. This seal mechanism 6
Similar to the seal cut mechanism 60, the seal cut mechanism 5 is pressed against the film packaging material 10 to perform welding and joining. Seal machine T! 6
The length of 5 is set according to the total length of the sheet material S to be packaged.

A seal packaging method for sheet materials using the above-mentioned apparatus will be explained.

As shown in FIGS. 1 and 2, the film packaging material 10 fed onto the suction belt conveyor 30 is held by suction belt 30 with the folded side 12 in contact with the guide member 50. The leading end portion of the film packaging material 10 is placed between the seal cutting mechanisms 60. The seal cut mechanism 60 operates, and the overlapped film packaging material 10 is folded on the folded side 12.
The front end joint portion 16 is formed by welding and joining in a direction perpendicular to the front end joint portion 16 .

Next, as shown in FIG. 4, the vacuum suction pad 40 is lowered to suction and hold only the top side piece of the film packaging material 10. In this state, when the vacuum suction pad 40 is raised, the upper side piece of the film packaging material 10 is lifted, leaving a large gap between it and the lower side piece, as shown in FIG.

As shown in FIGS. 2 and 3, the sheet material S is inserted into the gap between the film packaging materials IO. The front end side of the sheet material S is brought into contact with the inside of the front end joint portion 16 of the film packaging material 10 at its short side. Further, the back side, which is the long side of the sheet material S, is brought into contact with the inner surface of the folded side 12 of the film packaging material 10 positioned by the guide member 50.

The front end joint 16 and the folded side 12 of the film packaging material 10 are positioned and fixed on the suction belt converter 3o, so that when the sheet material S is pushed into the film packaging material 10, the front end joint 16 and the folded side 12 are securely fixed. 16 and the folded side 12.

Next, as shown in FIG. 4, the suction held conveyor 30 is operated to feed the film packaging material IO onto the belt conveyor 70, and among the film packaging materials 10,
The part where the sheet material S is inserted is the seal cut mechanism 60
so that it can be sent to the front of the At the stage when the rear edge of the sheet material S has moved to the front of the sealing force mechanism 60,
The movement of the film packaging material 10 is stopped, the seal cut mechanism 60 is activated, and the film packaging material 1o is again welded and joined in the direction orthogonal to the folded side 12 to form the rear end joint portion 17. At this time, it is sufficient to leave a minimum necessary gap between the rear end joint portion 17 and the rear end side of the sheet material S.

The seal cutting mechanism 60 cuts and separates the film packaging material 10 at the rear end of the rear end joint 17 at the same time as forming the rear end joint 17 . Further, in the seal cutting mechanism 60, a front end joint portion 16 for another sheet material S to be packaged in the next packaging cycle is welded and formed. That is, in this step, the seal cutting mechanism 60 forms the rear end joint 17, cuts and separates the film packaging material IO, and cuts the next front end joint 16.
Three types of work are carried out at the same time: the formation of To do this, the heating members 62 and 61 may be formed to have a width that is the sum of the rear end joint portion 17 and the front end joint portion 16, and a cutting blade portion may be provided at the center of the width.

As shown in FIG. 1, the film packaging material 10 on which the rear end joint portion 17 is formed is positioned in the depth direction on the heldcon head 0 with the folded side 12 in contact with the guide member 52. In this state, press the sealing mechanism 65 against the upper surface of the film packaging material 10 on the near side.1. Once the front side joint portion 18 is formed in a direction parallel to the folded side 12 by welding and joining, the sealed packaging of the sheet material S is completed. By repeating these steps sequentially, a long film packaging material 1
The sheet materials S can be enclosed and packaged one after another.

In the above embodiment, the sheet materials S can be wrapped one after another while continuously feeding the long film packaging material IO, so this is a preferred method for mechanizing and automating the packaging process. It is possible to improve the efficiency of work.

As shown in FIGS. 5 and 6, the sheet material S wrapped in the separated film packaging material 14 has its front end side (the left side in FIG. 5) connected to the front end joint 16 of the film packaging material 14 without any gap. They are in contact with each other, and there is only a slight gap between the rear end side (the right side in FIG. 5) and the rear end joint portion 17.

In addition, the back side (the top side in FIG. 5) of the sheet material S is in contact with the folded side 12 of the film packaging material 14, and the front side (the bottom side in FIG. 5) and the rear end joint 17 There is only a slight gap between them.Therefore, the difference between the external dimensions of the sheet material S and the internal dimensions of the film packaging material 14 is very small.

When the sheet material S was actually packaged using the method of the present invention under various conditions, the distance ΔL from the rear end of the sheet material S to the rear end of the film packaging material 14 in FIG. However, it does not exceed 15 m, and the distance Δ from the front side of the sheet material S to the front side edge of the film packaging material 14
The maximum W did not exceed 15 mm. In the conventional method of creating a gap between the entire circumference of the sheet material S and the joint part of the film packaging material IO, the above-mentioned ΔL and Δ
Compared to the case where W was required to be approximately 30 to 4 ONM, the present invention makes it possible to significantly reduce the gap between the sheet material S and the film packaging material 14, thereby reducing the overall area of the film packaging material 14. I see that it is possible.

〔Effect of the invention〕

According to the sill packaging method for sorting material according to the present invention described above, the front edge and rear edge of the sheet material are brought into close contact with the film packaging material without any gaps, and the remaining rear edge and The film packaging material is joined on the outside of the front side, and the sheet material is enclosed and packaged. As a result, like the traditional method,
Compared to the case where it is necessary to leave a large gap between all four sides of the sheet material and the joint of the film packaging material,
There is no gap on at least one side of the opposing sides, and the gap between the sheet material and the film packaging material can be reduced by that amount.

In addition, the remaining rear end joint and front joint are formed by bringing the front edge and back side of the sheet material into contact with the front end joint or the folded side of the film packaging material and positioning them accurately. Therefore, when forming these rear end joints and front joints, it is possible to form the joints directly (near) the rear edge or front side of the sheet material without taking into account excessive positional errors. , it is possible to shorten the gap between the rear end side and the front side of the film packaging material.

Due to the above two effects, the gap between the sheet material and the film packaging material becomes very short, the required area of the film packaging material becomes small, and the material cost can be reduced. Also,
Since the planar area in the packaged state becomes smaller, the space required for transportation and storage is also reduced, and transportation efficiency and storage efficiency are also improved.

Furthermore, there is little gap between the film packaging and the sheet material (
This prevents the sheet material from moving inside the film package during transportation or handling, making handling easier and eliminating the fear that the sheet material will move and be damaged within the package.

[Brief explanation of drawings]

Fig. 1 is a plan view of the entire packaging device showing an embodiment of the present invention, Fig. 2 is a front view, Fig. 3 is an enlarged cross-sectional view taken along the line ■■ in Fig. 2,
FIG. 4 is a front view of essential parts showing the operating process of the seal cut mechanism, FIG. 5 is a plan view of the film packaging material in which the sheet material is wrapped, and FIG. 6 is an enlarged sectional view. IO...Film packaging material 50.52...Guide member 60...Nurkanote mechanism 65...Seal mechanism 14...Film packaging material in wrapped state 16...Front end joint portion 17...Rear end Joint part 18... Front side joint part S... Sorting material

Claims (1)

[Claims] 1 In a method of wrapping a sheet material in a film packaging material and joining the opening of the film packaging material for enclosing packaging, the film packaging material folded in half is joined in a direction perpendicular to the folded side to form a front end joint. After that, a rectangular sheet material is inserted into the gap between the film packaging materials, and the front edge of the sheet material is brought into contact with the front end joint of the film packaging material, and the back side of the sheet material is positioned by the guide member. The sheet material is positioned by contacting the folded side of the packaging material, and then the film packaging material is joined on the outside of the trailing edge of the sheet material in a direction perpendicular to the folded side to form a trailing edge joint. Further, the sheet material is characterized in that the film packaging material is joined in a direction parallel to the folded side on the outside of the front side of the sheet material while the guide member is in contact with the folded side of the film packaging material. Seal packaging method.