JPH07315308A - Packing method of hollow article, device therefor, outside sealing device, and inside sealing device - Google Patents

Abstract

PURPOSE:To dispense with a highly contractive film and eliminate restriction of materials and reduce the material cost of film and readily and rapidly pack articles and further, prevent the trace of film from leaving on packed articles even when they are stacked and hence, keep the packed shape in a good condition. CONSTITUTION:This packing method is composed of a process in which articles 7 having a hollow part 7a are fed by turns into an opening 14 formed between a pair of long thermocontractive packing materials, a process in which both packing materials are stuck and cut between the front and behind articles 7 so as to cut off both breadthwise (b) ends of the packing material, by connection of a pair of sealing materials 28, 23, a process in which both packing materials covering the article 7 are stuck and cut off so as to be positioned along the inside peripheral face of the hollow part 7a of the article 7, and a process in which both packing materials are contracted with heat.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and apparatus for packaging a hollow packaged object formed by winding a long body such as a metal filament and a cord wire into a coil, and an outer sealing device and the like. Inner seal device.

[0002]

2. Description of the Related Art Conventionally, for example, long articles such as metal filaments and cords are wound into a coil for convenient handling and then wrapped with a film as a packaging material. The current situation is that they are transported and stored in that state.

A means for wrapping a packaged object having this hollow portion with a film is, for example, as shown in FIG.
A means for mounting the tubular heat-shrinkable film 93 covering the 91 by heat-shrinking is adopted.

That is, in order to wrap the packaged object 91, first,
A uniaxially stretched film 93 is wound around the outer periphery of the packaged object 91 to form a tubular shape and then heat-shrinked ((a) to (c) in the figure)
reference). Further, a jig or the like is pushed into the hollow portion of the packaged object 91 to cover the inner peripheral surface of the packaged object 91 while the film 93 immediately after being heated and shrunk still has residual heat (the same figure (d)). And (e)).

[0005]

In the conventional wrapping means described above, after the film wound on the package 91 is heat-shrinked, a jig or the like is attached to the package 91 while the film 93 still has residual heat. Since it had to be pushed into the hollow part, the shrinking work was troublesome and complicated. Further, since the inner peripheral surface of the packaged object 91 is covered with the film wound in a tubular shape, a uniaxially stretched highly shrinkable film is required. Further, since the uniaxially stretched film has poor strength balance, a thick film is preferable. It tends to be necessary, limited in terms of material, and high in material cost. Moreover, since the joint portions 94 of the film 93 are located on both sides of the packaged object 91 as shown in FIG.
In the case of stacking a plurality of layers, there is a drawback in that the joint portion 94 is pressed against the article to be packaged 91 and a trace thereof remains, and the stacked state is not stable.

[0006] Therefore, as a packaging means for solving the above-mentioned material cost and the problem of leaving a film joining portion mark on the packaged object, the packaged object is supplied with a space between the two folded films, It is conceivable that both film pieces of the film will be heat-shrinked after being fused and sealed by a so-called L-type sealing device, but in this case, since the packaged body has a hollow portion, how the inner circumference of the hollow portion is The issue is how to pack along the surface.

In addition, since the conventional L-type sealing device melts and seals both film pieces linearly in the width direction, the shape of both film pieces covering the package is rectangular in plan view. Therefore, for example, when the object to be packaged has a circular shape in plan view, the contraction of the corner portion of the film piece becomes incomplete,
There is a drawback that the packaging form becomes poor.

The present invention has been made in view of the above-mentioned problems of the prior art. It does not require a highly shrinkable film and is not limited in terms of material. The material cost of the film can be reduced, and the packaging work can be performed easily and quickly. It is an object of the present invention to improve the packaging form without leaving traces of films on the packaged objects even when the packaged objects are stacked.

[0009]

The present invention has been made as a method and apparatus for packaging a hollow packaged object in order to solve the above problems. The features of the method for packaging a hollow packaged object are as follows: A pair of elongate heat-shrinkable packaging materials 3a,
By sequentially supplying the packaged body 7 having the hollow portion 7a to the opening 14 formed between the 3b and joining the pair of sealing members 28 and 23, the packaged material is provided between the packaged bodies 7 that are in front of and behind the packaged material. Both packaging materials 3a, 3b so that both ends of the width direction b are cut out.
a step of adhering and cutting a and 3b, a step of adhering and cutting both wrapping materials 3a and 3b covering the packaged object 7 so as to be substantially along the inner peripheral surface of the hollow portion 7a of the packaged object 7, and , Both packaging materials 3
and a step of heat-shrinking a and 3b.

Further, a step of sequentially supplying a packaged object 7 having a hollow portion 7a to an opening 14 formed between a pair of elongated heat-shrinkable packaging materials 3a and 3b, and a pair of sealing members. 2
A step of adhering and cutting both packaging materials 3a and 3b by joining 8 and 23 so as to cut out both end portions of the packaging materials 3a and 3b in the width direction b between the front and rear packaged objects 7, and Having a step of heat-shrinking both packaging materials 3a, 3b, and a step of adhering and cutting the heat-shrinkable both packaging materials 3a, 3b so as to be substantially along the inner peripheral surface of the hollow portion 7a of the packaged object 7. It is in.

The feature of the hollow packaged object as a packaging device is that the packaged article 7 having a hollow portion 7a in an opening 14 formed between a pair of heat-shrinkable long packaging materials 3a, 3b. Are sequentially supplied, and a pair of seal members 2 are provided for adhering and cutting between the packaged objects 7 before and after the packaging materials 3a, 3b and in the width direction b.
8 and 23 are provided so as to be able to come into contact with and separate from each other, and at least one of the heated sealing members 28 is inclined to the packaged body 7 front side with respect to the width direction b of the packaging materials 3a and 3b.
And a rear seal portion 28c inclined to the rear side of the packaged object 7 and further covering the packaged object 7 at a position downstream of both seal members 28, 23 in the packaged object transfer direction a. In order to bond and cut both the packaging materials 3a and 3b along the inner peripheral surface of the hollow portion 7b of the packaged body 7, a pair of inner seal members 50 and 44 are formed.
And are provided so that they can come into contact with and separate from each other.

Further, the feature of the outer sealing device is that the packaged body 7 having the hollow portion 7a is sequentially supplied to the opening 14 formed between the pair of elongated packaging materials 3a, 3b having heat shrinkability. In the outer sealing device that bonds and cuts the pair of outer sealing members 28, 23 between the packaged objects 7 of the two packaging materials 3a, 3b and in the width direction b, the sealing members 28, 23 are joined together. Has a front seal portion 28b inclined forward to the packaged object 7 side with respect to the width direction b of the packaging materials 3a, 3b, and a rear seal portion 28c inclined rearward to the packaged object 7 side. It is in.

A feature of the inner sealing device is that the inner sealing device is for packaging the hollow portion 7a of the packaged object 7 having the hollow portion 7a covered with the pair of packaging materials 3a and 3b. A pair of seal members 50 and 44, which are provided on the packaged object 7 and are inserted into the hollow portion 7a from both sides to bond and cut both the packaging materials 3a and 3b substantially along the inner peripheral surface of the hollow portion 7a, are provided. It is to be provided so that it can be moved in and out of contact.

[0014]

In the above invention, the pair of seal members 28, 23
The outer peripheral edges of the two film pieces 3a and 3b are bonded and cut by joining the film pieces 3a and 3b together. It is possible to reduce the extra corners of 3b. In addition, the portions of the packaging materials 3a and 3b that cover the packaged object 7 corresponding to the hollow portion 7a of the packaged object 7 are fused and sealed substantially along the hollow portion 7a.

Therefore, when the packaging materials 3a and 3b are heat-shrinked, the excess portions of the packaging materials 3a and 3b are reduced in shrinking, and therefore the packaging materials 3a and 3b are not limited to those made of a highly shrinkable material. Heat shrinks in a state of being in close contact with the object to be packaged 7.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 1 to 4, reference numeral 1 denotes a packaging device for packaging a packaged object 7 having a circular shape in a plan view, which is formed by winding a long body such as a metal filament and a cord wire in a coil shape. It is provided with a supply section A for feeding out the heat-shrinkable film 3 as a folded packaging material and supplying the packaged object 7 transferred by the conveyor 8 into the film 3. In this supply unit A, a conveyor 8 for transferring the packaged object 7 and a pair of upper and lower opening guide plates 10a, 10b provided in a plan view and provided in a predetermined space are capable of feeding the film 3 freely. It is provided on the machine base 5 which is supported by.

Therefore, the upper film piece 3a of the film 3
Is folded inside the upper opening guide plate 10a by the oblique side edge 12a of the upper opening guide plate 10a, and the lower film piece 3b is
The lower opening guide plate 10b positioned below the conveyor 8 is folded inside the lower opening guide plate 10b by the oblique side edge 12b, and the packaged body 7 is placed between the upper and lower film pieces 3a and 3b.
The opening 14 is formed so that

As shown in FIGS. 1 and 3, reference numeral 15 is a film piece 3a, 3b formed by heating the open ends of the upper and lower film pieces 3a, 3b.
Side sealer for fusing and sealing along the longitudinal direction of the scrap, scraps cut from the upper and lower film pieces 3a, 3b
The winding device 17 is wound by a winding device (not shown).

A film outer fusing seal portion B is provided at a position downstream of the supply portion A, and an outer sealing device 20 for fusing and sealing the film 3 covering the packaged object 7 is provided. The outer seal device 20 can be lifted and lowered by a cylinder (not shown) so that it can be lifted and lowered by a seal receiving base 23 (sealing member) and a cylinder 26 attached to a gate-shaped frame 25 so as to come into contact with and separate from the seal receiving base 23. Further, it comprises a seal bar 28 (seal member) having a heater built therein.

As shown in FIG. 5, the seal bar 28 has a horizontal seal portion 28a in a direction (widthwise direction of the film 3) b orthogonal to the transfer direction a of the package 7 and both ends of the horizontal seal portion 28a. Is provided with a front seal portion 28b and a rear seal portion 28c that open in a forked direction from the front to the rear, and these seal portions 28a, 28b,
28c each have a linear shape, and the inclination angle α of both the front and rear seal portions 28b and 28c with respect to the horizontal seal portion 28a is approximately 45.
It is set to °. On the other hand, the seal stand 23 also has a seal bar.
28 corresponding to the horizontal seal portion 23a and the front and rear seal portion 23.
b, 23c, and the seal bar 28 and the seal pedestal 23 form a pair of seal members. Therefore, both sides of the film 3 in the width direction b are notched in a triangular shape for sealing, The film 3 covering the package 7 can be fused and sealed into a substantially octagonal shape in plan view.

Further, a film inner fusing seal portion C is provided at a position downstream of the film outer fusing seal portion B, and an inner sealing device 30 for fusing and sealing the hollow portion 7a of the packaged body 7 in the film 3 is provided. Is equipped with. As shown in FIG. 6, in the inner seal device 30, a lifting cylinder 37 is supported by a screw portion 34 of a handle 33 that is rotatably supported by a support portion 31 attached to a lower position of the machine base 5. The mounting body 36 is screwed.

An elevating plate 41, to which a plurality of guide rods 40 are connected, is fixed to the upper end of the rod 38 of the elevating cylinder 37, and each guide rod 40 is vertically slidable on a support body 43 of the machine base 5. Has been inserted into. A circular and annular seal receiving base 44 is horizontally attached to the upper end of each guide rod 40.
The seal receiving stand 44 is the packaged object 7 held by the conveyor 8.
7, which can be freely inserted into and removed from the hollow portion 7a, and a plurality of needles 46 for forming air vent holes 45 in the upper and lower film pieces 3a, 3b are arranged at intervals in the circumferential direction thereof, as shown in FIG. Each of the needles 46 is connected to a rod 47 of the cylinder and is inserted through the seal receiving base 44 so as to be vertically retractable.

Reference numeral 50 denotes a heater provided above the seal receiving base 44, which is composed of an annular heater portion 51 which can be moved up and down by a cylinder 52, and a film retainer 53 which surrounds the outside of the heater portion 51. . That is, the annular heater portion 51
The seal portion 51a formed at the lower end presses the receiving surface 44a of the seal receiving base 44 inside the needle 46, and the film 3 can be fused and sealed along the inner peripheral surface of the hollow portion 7a of the packaged object 7. It is like this.

The film retainer 53 is composed of inner and outer double cylindrical retainers 55 and 56. As shown in FIG.
The lower ends of 55 and 56 are located below the lower end of the heater section 51, and the lower end of the inner pressing body 55 is located below the lower end of the outer pressing body 56. In addition, both pressers 55, 56
Are provided so as to be vertically movable relative to each other with respect to the annular heater portion 51, and are normally provided with springs 57a,
It is biased downward by 57b. The spring 57a of the inner pressing body 55 is set to be weaker than the spring 57b of the outer pressing body 56.
When 56 is pressed, the inner presser 55 can be easily
The heater unit 51 can be stopped by moving relative to the unit 51.

Reference numeral 58 designates a central film holder having a circular shape in plan view, which is vertically movable by a cylinder as shown in FIG.
It is provided in the inner diameter 44c of the seal receiving base 44 so as to be freely inserted and removed,
On the lower surface of the central film retainer 58, upper and lower film pieces 3 are provided to expel air in the film 3 covering the packaged object 7.
A cutter 59 for cutting a part of a and 3b is provided.

As shown in FIG. 1, reference numeral 63 designates the package 7 covered with the film 3 at a predetermined position, that is, the seal receiving base 44.
A stopper for positioning the packaged object 7 at a position where the center of the packaged object 7 and the center of the packaged object 7 coincide with each other, which can move in the up and down direction and come in contact with and separate from each other according to the diameter of the packaged object 7. The spacing is adjustable. Reference numeral 65 denotes a shrink device for heat-shrinking the film 3 covering the package 7 and is provided at a position downstream of the film inner fusing seal portion C.

The apparatus according to this embodiment has the above-mentioned structure. Next, a case where the apparatus 7 is used to wrap the packaged article 7 will be described. First, the upper film piece 3a of the roll-shaped film 3 set on the machine base 5 is moved to the upper opening guide plate 10a.
And the lower film piece 3a passes above the lower opening guide 10b below the conveyer 8 to form an opening 14 between the upper and lower film pieces 3a and 3b.

Next, the seal bar 28 is lowered to the seal receiving base 23 of the outer sealing device 20, and the leading ends of the film 3 are closed to form a fusing and welding portion at the leading ends. Furthermore, the seal bar
After the package 7 is transferred by the conveyor 8 after the rise of 28, the package 7 is moved from the opening 14 to the upper and lower film pieces 3.
The film 3 is fed into the a and 3b, and the film 3 is unwound with the movement of the packaged object 7 (see FIG. 9 (a)), and the scrap 17 cut by fusing and welding in the longitudinal direction of the film 3 by the side sealer 15 is cut. Is wound up.

When the package 7 covered with the film 3 passes through the outer sealing device 20, the seal bar 28 descends again and the seal pedestal 23 rises to an intermediate height of the package 7 and The upper and lower film pieces 3a and 3b between the wrapping body 7 and the rear wrapping body 7 are fused and sealed at a substantially central position of the wrapping body 7 (see FIGS. 9B and 9C). Both sides 61 in the width direction b of 3 are cut out in a triangular shape,
The packaged body 7 is covered with the film 3 formed in an octagon.

An air bleeding needle 67 is provided integrally with the seal bar 28 at the front and rear positions of the seal bar 28. When the seal bar 28 descends, the needle 67 covers the upper film piece 3a. An air vent hole 68 for shrinking is formed on the outer side of the package 7 (see FIG. 9D).

Further, when the package 7 is transferred to the film inner fusing seal portion C, first, the seal receiving base 44 of the inner sealing device 30 has its receiving surface 44a positioned at the center of the package 7. As it rises, the central film holder 58 descends and the cutter 59 cuts a part of the upper and lower film pieces 3a, 3b (see FIG. 10A). Furthermore, central film holder 58
When the temperature rises and the heater 50 descends, first, the lower end of the inner pressing body 55 contacts the receiving surface 44a of the seal receiving base 44, and the inner pressing body 55 moves relatively to the descending annular heater portion 51.

Next, the lower end of the outer presser 56 is attached to the seal holder 44.
The outer pressing body 56 moves relative to the annular heater portion 51 by contacting the upper surface of the. Further, after the film 3 is pressed by the inner and outer pressing members 55, 56, the annular heater portion 51 melts and seals the upper and lower film pieces 3a, 3b, and the needle 46 is raised and pressed by the inner and outer pressing members 55, 56. The air vent holes 45 are surely formed in the upper and lower film pieces 3a and 3b in the state (Fig. 10).
(See (b)).

As described above, the film 3 is fused and sealed along the inner peripheral surface of the hollow portion 7a of the packaged body 7, and the central film presser 58 is lowered again to cut the upper and lower film pieces 3a, 3b. The circular center portion 3c of the can be discharged downward (see FIG. 11 (a)). When the inner peripheral portion of the packaged object 7 is welded, the upper and lower film pieces 3a and 3b are preliminarily cut by a cutter 59 provided in the central film holder 58 so that the air in the film 3 can be discharged. Therefore, when the film 3 is pressed by the inner and outer pressing members 55 and 56, or when the film 3 is fused and sealed by the heater, the upper and lower film pieces 3a and 3b can be surely pressed to the receiving surface 44a of the seal receiving base 44. It becomes possible and the fusing seal of the film 3 becomes reliable.

Further, when the central film retainer 58 rises and the seal receiving stand 44 descends, the packaged object 7 covered with the film 3 is transferred and transferred to the shrink device 65 for thermal contraction ( See Fig. 11 (b) and (c)),
Since the upper and lower film pieces 3a, 3b are formed in an octagonal shape so as to substantially follow the outer shape of the packaged object 7, there are few unnecessary corner portions of the film 3, and the film 3 can prevent the packaged object 7 from being packaged. An annular seal can be made along the inner peripheral surface of the hollow portion 7a, and the heat shrinkage becomes good. In addition, since the seal portions 3d of the upper and lower film pieces 3a and 3b are located on the outer peripheral surface and the inner peripheral surface of the packaged object 7, even if the packaged objects 7 are stacked in a plurality of stages, the marks of the seal sections are left. Does not remain on the packaged object 7, and can be stably stacked. Further, since the biaxially stretched heat-shrinkable film 3 having a good strength balance can be used, a package having a stable strength can be obtained even if a thin film is used.

The present invention is not limited to the above-described embodiment. For example, as shown in FIG.
Is fastened and fixed to the side surface of the annular heater portion 51 of the heater 50. Reference numeral 71 is an elongated hole formed in the inner and outer double cylindrical pressing members 55 and 56 of the film pressing 53 to allow the bolt 70 to escape.

FIG. 13 shows still another embodiment of the present invention, in which the film 50 is melt-sealed by the heater 50 in the inner sealing device 30 in each of the above-mentioned embodiments, whereas in this embodiment, The heater part 51a has inner and outer bifurcated adhesive parts 74, and a circular cutter 73 having a saw-tooth cutting part 72 at the upper end as shown in FIG. 14 between the adhesive parts 74.
However, it is provided so as to be able to move up and down by a rod 75 of the cylinder. Therefore, in this embodiment, the film 3 can be bonded at the bonding portion 74, and the circular cutter 73 can move up to cut the sealed film 3. It should be noted that the outer sealing device 20 is not limited to the fusing seal and may be configured to be heat-sealed and then cut.

In the embodiment shown in FIG. 15, the heater 51a having the inner and outer bifurcated adhesive portions 74 shown in FIGS. 13 and 14 and the circular cutter 73 are provided, and the circular cutter 73 is moved up and down. The needle 46 is mounted upward on the rod 75 of the cylinder. In this way, the needle 46
By installing on the rod 75 side of the cylinder, not on the side,
The needle 46 can be prevented from being heated, and the needle 46 can be safely attached and detached and adjusted.

Further, in the embodiment shown in FIG. 16, the shrink device 65 is provided between the film outer fusing seal portion B and the film inner fusing seal portion C. Therefore, after the film 3 covering the packaged object 7 is appropriately heat-shrinked,
While the film 3 is still softened by the heat at the time of heat shrinkage, or by being heated again, the film is softened and pushed into the hollow portion, and is fused and sealed so as to follow the hollow portion 7a of the packaged body 7. You can

Further, in each of the above embodiments, the packaged body 7 is wrapped with the film 3 folded in half, but the upper and lower separate films 3 are provided so as to be freely drawn out.
The side sealers 15 may be arranged on both sides of each of the elongated upper and lower film pieces to seal both ends of the upper and lower film pieces.

Further, the shapes of the seal receiving base 23 and the seal bar 28 are such that the front and rear seal portions 28b and 28 are formed as shown in FIG.
c may be formed in an arc shape, or may be bent in a dogleg shape as shown in FIG. 7B, and its shape is arbitrarily designed according to the shape of the packaged object 7. It can be changed. Further, in the case of the thick film 3, it is preferable that a heater is also attached to the seal pedestals 23 and 44 so that the seal pedestals 23 and 44 can be heated.

[0041]

INDUSTRIAL APPLICABILITY As described above, according to the present invention, the excess corner portions of the film piece that covers the packaged object are removed by cutting out the excess portions at both widthwise ends of the film that covers the packaged object. It is possible to reduce the number. Furthermore, the part corresponding to the hollow part of the packaged object in the film covering the packaged object is bonded and cut substantially along the hollow part,
Even if the film does not have a high heat shrinkability, the shrinkage can be improved, and the film is not limited to the one made of a highly shrinkable material, and there is an advantage that the material cost can be reduced.

Moreover, unlike the conventional method, it is not necessary to push a jig or the like into the hollow portion of the packaged object while the film has residual heat,
Shrink work can be done easily and quickly. Further, even when the objects to be packaged are stacked, since a pair of film pieces can be sealed at the side peripheral surface of the object to be packaged, traces of the sealing portion of the film may remain on the object to be packaged. Instead, stable stacking is possible.

Further, in the packaging device for the hollow article to be packaged, the above series of articles can be automatically packaged,
It is possible to improve work efficiency.

[Brief description of drawings]

FIG. 1 is an overall plan view including a partially cutaway showing an embodiment of the present invention.

FIG. 2 is a front view including the same portion broken.

FIG. 3 is a plan view of the entire device.

FIG. 4 is a front view of the same.

FIG. 5 is a perspective view of an outer seal device.

FIG. 6 is a cross-sectional side view of the inner sealing device.

FIG. 7 is a cross-sectional view showing the main part.

FIG. 8 is a sectional view showing the main part.

FIG. 9 shows a state in which a film is fused and sealed by an outer sealing device, (a) is a cross-sectional view before the film is fused and sealed by a seal bar and a seal pedestal, and (b) is a state in which the film is fused and sealed. A cross-sectional view, (C) is a plan view of the same fused seal, and (D) is a plan view of a packaged object covered with a film.

FIG. 10 shows a state in which a film is fused and sealed by an inner sealing device, (a) is a cross-sectional view of a state where the film is pressed by a central film presser, and (b) is a cross-sectional view of a state where the film is fused and sealed by a heater. .

FIG. 11 shows a state in which a film is fused and sealed by an inner sealing device, (a) is a cross-sectional view of a state in which a heater is raised, and (b) is a cross-sectional view of a state in which a packaged object is covered with the film, (C) is a cross-sectional view of a state in which the film covering the packaged object is heat-shrinked.

FIG. 12 is a cross-sectional view of essential parts of an inner sealing device showing another embodiment of the present invention.

FIG. 13 is a cross-sectional view of a main part of an inner sealing device according to another embodiment of the present invention.

FIG. 14 is a perspective view including the same portion broken.

FIG. 15 is a cross-sectional view of a main part of an inner sealing device according to another embodiment of the present invention.

FIG. 16 is a front view including a partially cutaway view showing another embodiment of the present invention.

FIG. 17 shows another embodiment of the present invention, in which (a) and (b) are plan views of the seal bar.

FIG. 18 shows a conventional example, and (a) to (e) are cross-sectional views showing the steps of wrapping a packaged object with a film,
(F) is a perspective view of a packaged object wrapped with a film.

[Explanation of symbols]

3 ... Film, 3a, 3b ... Film piece, 7 ... Packaged object, 7a
... Hollow part, 23 ... Seal pedestal, 28 ... Seal bar, 28b ... Front seal part, 28c ... Rear seal part, 44 ... Seal pedestal, 50
... Heater, a ... Transfer direction of packaged object, b ... Film width direction

Claims (5)

[Claims] 1. An object to be packaged (7) having a hollow portion (7a) in an opening (14) formed between a pair of elongated heat-shrinkable packaging materials (3a), (3b). A step of sequentially supplying,
By joining the pair of seal members (28) and (23), the space between the front and rear objects to be packaged (7) and the packaging material (3a),
A step of adhering and cutting both packaging materials (3a) and (3b) so that both ends of the width direction (b) of (3b) are cut out, and both packaging materials (3a) covering the packaged object (7), A step of adhering and cutting (3b) so as to substantially follow the inner peripheral surface of the hollow part (7a) of the article to be packaged (7), and a step of heat-shrinking both packaging materials (3a), (3b) A method for packaging a hollow article to be packaged, comprising: 2. An object to be packaged (7) having a hollow portion (7a) in an opening (14) formed between a pair of elongated heat-shrinkable packaging materials (3a), (3b). A step of sequentially supplying,
By joining the pair of seal members (28) and (23), the space between the front and rear objects to be packaged (7) and the packaging material (3a),
A step of adhering and cutting both packaging materials (3a) and (3b) so as to cut out both ends in the width direction (b) of (3b), and further heat shrinking both packaging materials (3a) and (3b) And a step of adhering and cutting the heat-shrinkable packaging materials (3a) and (3b) so as to be substantially along the inner peripheral surface of the hollow part (7a) of the packaged object (7). The method for packaging a hollow packaged article. 3. An object to be packaged (7) having a hollow portion (7a) in an opening (14) formed between a pair of heat-shrinkable long packaging materials (3a), (3b). A pair of outer seal members (28) and (23) are sequentially supplied to bond and cut between the packaged objects (7) before and after the packaging materials (3a) and (3b) and in the width direction (b). At least one of the heated sealing members (28) provided so as to be able to come into contact with and separate from each other is a packaging material (3a),
A front seal part (28b) inclined forward to the packaged object (7) side with respect to the width direction (b) of (3b) and a rear seal part (28c) inclined rearward to the packaged object (7) side. In addition, both packaging materials (3a), (which cover the article to be packaged (7)) are provided at a position downstream of the seal members (28) and (23) in the transport direction (a) of the article to be packaged. A pair of inner seal members (50) and (44) are provided so as to be freely contactable and separable in order to bond and cut 3b) along the inner peripheral surface of the hollow part (7b) of the packaged body (7). A packaging device for a hollow article to be packaged. 4. An object to be packaged (7) having a hollow portion (7a) in an opening (14) formed between a pair of heat-shrinkable long packaging materials (3a), (3b). By successively supplying and joining the pair of seal members (28) and (23), the two packaging materials (3a) and (3b) are bonded between the articles to be packaged (7) and in the width direction (b). In the outer sealing device for cutting, the sealing members (28) and (23) are packaging materials (3a),
A front seal part (28b) inclined to the front side of the packaged object (7) with respect to the width direction (b) of (3b) and a rear seal part (28c) inclined to the rear side of the packaged object (7). An outer seal device comprising: 5. A hollow part (7a) of a packaged object (7) having a hollow part (7a) covered with a pair of packaging materials (3a), (3b).
An inner side sealing device for wrapping, wherein both packaging materials (3a) and (3b) are inserted into the hollow part (7a) provided on the body to be packaged (7) from both sides and the hollow part (7a) is inserted. A pair of seal members (5
An inner seal device characterized in that 0) and (44) are provided so as to be able to come into contact with and separate from each other.