JPH10167209A - Widely opening device of packaging film end - Google Patents

Abstract

PROBLEM TO BE SOLVED: To carry out a widening and flattening work of the extended end of a wound-up packaging body in a transfer process of the body and reduce the lead time of a packaging work and carry out the packaging work at a high speed. SOLUTION: Winding drive mechanisms 20 are provided at both sides or a conveyor 10 transferring a wound-up packaging body 100. And first and second chains 22, 23 are moved parallelly to the transfer way of the wound-up packaging body 100. The first opening/closing means 30 is equipped to be openable and closable in the first chain 22 and the second opening/closing means 31 is equipped to be openable and closable in the second chain 23. These first and second opening/closing means 30, 31 are fitted to the first and second opening/closing guide means having a cam face and opened or closed in accordance with the cam shape of the means. The first and second opening/closing means 30, 31 open widely the extended end of the packaging body 100 in accordance with the opening motion thereof.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wrapping film edge expanding device incorporated in a wrapping device for automatically wrapping an outer surface of an article by using a wrapping film. While being rolled, the seam of the rolled packaging film is heat-sealed to be formed into a cylindrical shape, and the packaging film is extended in a rolled package in which both ends of the packaging film extend from both ends of the article. The present invention relates to a packaging film end expanding device for expanding and flattening a projecting end.

[0002]

2. Description of the Related Art A packaging device generally called an overwrapping machine includes:
Conventionally, a packaging film is wound around the outer surface of an article to form a body-wound package, and as shown in FIG.
0a is folded, and the folded extended end portion 100a is thermally fused. However, in the conventional overwrapping form in which the extended end portion 100a of the body-wrapped package is folded and then heat-sealed, when the reaction force from the article side is not sufficiently obtained in the folded portion, the overlapping portion of the packaging film is heated. Due to the fusion, it is difficult to completely seal, and there is a defect that the sealing property is lacking.

Therefore, in recent years, as shown in FIG.
After forming the body-wrapped package 100 (FIG. 1A) by winding the packaging film 102 on the outer surface of No. 01, the extended end portion 100a is expanded and flattened (FIG. 2B). There has been proposed a packaging apparatus that employs a packaging form in which the flattened extended end portions 100a are each heat-sealed and sealed. The extension end 100a of the heat-fused body-wound package 100
May be further folded and heat-sealed (FIG. 3C).

Japanese Patent Publication No. 7-110651 discloses a packaging apparatus for realizing automatic packaging of articles in this type of packaging. The packaging device disclosed in the publication is shown in FIG.
As shown in (1), the rolled package 100 in which the packaging film is rolled on the outer surface of the article is transported by the conveyor 201, and the forming device 202, the sealing device 203, and the side bending device 204 are arranged on the transport route. Then, the transfer of the body-wrapped package is stopped at the location where each of these devices is provided, and the required work is executed.

[0005]

SUMMARY OF THE INVENTION Among these, the molding apparatus 20
2 is a process of expanding and extending the extended end portion 100a of the body-wrapped package 100 to the left and right (a process of forming the form shown in FIG. 9B), and a process of expanding and flattening the body-wrapped package 100. And compressing the extension end portion 100a. Then, while these steps are completed, the transfer of the body-wrapped package 100 by the conveyor 201 remains stopped, so that the lead time until a series of packaging operations is completed becomes longer.

The present invention has been made in view of such circumstances, and particularly, an operation of expanding and flattening an extended end portion of a body-wound package in a process of transporting the package. It is an object of the present invention to provide a packaging film edge widening device capable of shortening a packaging work lead time and realizing a high-speed packaging operation.

[0007]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention relates to a method of manufacturing a wrapping film, comprising: forming an outer surface of an article; A packaging film end expanding device for expanding the extending end portion of the packaging film and flattening the extending end portion of the packaging film, wherein both ends of the packaging film extend from both ends of the article. It is characterized by having the following configuration.

Means for transporting the body-wrapped package The moving means that moves substantially parallel to the transport path of the body in synchronization with the transport means, and is mounted on the movement means so as to be openable and closable and moves in parallel with the body-wrapped package that has been transported. And first and second opening / closing means which are paired with each other and extend the extending end portions of the body-wrapped package from inside, and are provided along the movement path of the first opening / closing means, and the first opening / closing means for opening / closing the opening / closing means Opening / closing guide means Second opening / closing guide means provided along the movement path of the second opening / closing means to open / close the opening / closing means.

In the packaging film end opening apparatus of the present invention having such a configuration, the first and second opening / closing means move in parallel with the body-wrapped package transported by the transporting means.
When the first and second opening / closing means are opened by the first and second opening / closing guide means, the first and second opening / closing means expand the extending end portion of the body-wrapped package from the inside, and are flat. And Since this spreading operation is performed while the body-wrapped package is being conveyed, the apparatus can be operated continuously, which can contribute to speeding up of the packaging operation.

Here, the moving means can be constituted by an endless winding body such as a chain wound between at least two rotating bodies. Further, the first opening / closing guide means can be configured to have a cam surface that opens the first opening / closing means at a predetermined position on a movement path parallel to the body-wrapped package and closes it at another predetermined position. Similarly, the second opening / closing guide means can be configured to have a cam surface that opens the second opening / closing means at a predetermined position on a movement path parallel to the body-wrapped package and closes it at another predetermined position.

The first opening / closing means includes a first rotating member rotatably mounted on the endless wrapping member, and an extended end portion of the body-wrapped package provided at one end of the first rotating member. It is possible to adopt a configuration having a first expanding member that expands from the inside and a first engaging member that is provided at the other end of the first rotating member and engages with the cam surface of the first opening / closing guide unit. Further, the second opening / closing means includes a second rotating member rotatably mounted on the endless wrapping member, and an extending end provided at one end of the second rotating member and extending from the inside of the body-wrapped package. It can be configured to have a second expanding member that opens, and a second engaging member that is provided at the other end of the second rotating member and engages with the cam surface of the second opening / closing guide unit.

In such a configuration, the first and second opening / closing means move integrally with the endless winding body, and in the course of the movement, the cam surfaces of the first and second opening / closing guide means and the first and second opening / closing guide means. The first and second expanding members are opened and closed by engagement with the second engaging member, so that the extending end of the body-wrapped package being conveyed in parallel can be expanded from the inside.

Further, the endless winding body is constituted by first and second endless winding bodies which are wound around the common rotating body while being shifted in position, and the first rotating member of the first opening / closing means is provided. It is mounted on the first endless winding body, while the second rotating member of the second opening / closing means is mounted on the second endless winding body, and the first and second expanding means in the first and second opening / closing means are provided. By arranging the opening member to open and close on substantially the same plane, it is possible to prevent interference between the first and second rotating members.

The moving means, the first and second opening / closing means, and the first and second opening / closing guide means having the above-mentioned construction are provided at respective ends formed on both ends of the body-wrapped package conveyed by the conveying means. It is preferable to provide each corresponding to the protruding end.

[0015] The downstream end of the moving means is preferably arranged near a sealing device for heat-sealing the extending end of the body-wound package. With this arrangement, the package can be easily transported to the sealing device while maintaining the extended state of the extended end of the body-wrapped package. Further, along the transport path of the body-wrapped package whose extended end is expanded by the first and second opening / closing means,
By providing flat holding means having a continuous gap for holding a flat state across the extended end of the body-wrapped package, the expanded state of the extended end of the body-wrapped package is more reliably held. be able to.

[0016]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing an outline of a packaging system incorporating a packaging film end expanding device according to an embodiment of the present invention. First, an outline of a packaging system incorporating a packaging film end opening device according to this embodiment will be described with reference to FIG.

The upstream side of the packaging film end expanding device 1 (FIG. 1)
(Lower right direction), a body winding device (not shown) is installed. The article to be packaged is a cylindrical body-wound package 10 in which a packaging film is body-wound on the outer surface by the body winding device and a seam of the packaging film is heat-sealed.
0 (see FIG. 9 (a)) in the form of a package film end opening device. As described above, the body-wrapped package 100
Are extended from both ends of the article, and the packaging film end expanding device 1 has a function of expanding and flattening the extended end 100a (see FIG. 9B). doing.

On the downstream side (upper left direction in FIG. 1) of the wrapping film end expanding device 1, there is provided a sealing device 2 for heat-sealing the extended end portion 100a of the body-wrapped package 100. On the downstream side of the device 2, a folding device 3 and a folding portion sealing device 4 are arranged in order.

The sealing device 2 is provided with a pair of seal blocks 210 and 211 that are driven up and down at both sides (only one side is shown in FIG. 1) of the conveyed body-wrapped package 100, respectively. With these seal blocks 210 and 211, both extended end portions 10 of the body-wrapped package 100 are
Oa (expanded flat) is sandwiched, heat-sealed and sealed.

The folding device 3 is an elevator 3 that lifts the body-wound package 100 conveyed from the sealing device 2.
10 and a lower folded plate 311 and a lateral folded plate 312 disposed on both sides of the elevator 310, respectively. The lower folded plate 311 is provided so as to slightly protrude outward below the horizontal folded plate 312. Thus, a slight gap 313a is formed between the upper edge of the lower folding plate 311 and the lower edge of the horizontal folding plate 312 when viewed from a plane. Further, the horizontal folding plate 312 has a twist of 180 °.

In the process of being lifted by the elevator 310, the body-wrapped package 100 (both extending end portions 100a are flattened and heat-sealed) conveyed to the elevator 310 first has both extending end portions. Part 100a
Is engaged with the lower folding plate 311 and the same end portion 100a is bent downward. After that, both extension ends 100a are
13a, it engages with the horizontal folded plate 312, and is bent inward along the twisted shape of the plate 312.

The folding part sealing device 4 includes a seal belt 410 that supports and transports both side surfaces of the body-wrapped package 100 conveyed from the folding device 3. Package 1
Then, the folded ears are heat-sealed on both sides of 00.

Next, the structure of the packaging film end expanding device will be described in detail. As shown in FIG. 1, a conveyor 10 that constitutes a transport unit of the body-wrapped package 100 is provided at a central portion of the packaging film end expanding device 1. This conveyor 10
Are mounted on the drive chain 11 at regular intervals.
Is attached, and the body wound package 100 sent from the body winding device (not shown) is held by the transport claws 12 and is continuously transported at a constant speed. Here, the body-wrapped package 100 is held by the transport claws 12 in a posture in which both extension ends 100a extend sideways, respectively.

On both sides of the conveyor 10, winding drive mechanisms 20 are provided, respectively. FIG. 2 is a configuration diagram of the packaging film end expanding device according to this embodiment as viewed from the front. As shown in the figure, each winding drive mechanism 20 has a structure in which two endless winding bodies 22 and 23 are wound between two rotating bodies 21. In this embodiment, the rotating body 2
1 and 2 which are mounted on the same shaft 24 as one rotating shaft 24.
The first and second chains 22, 23 are used as two endless winding bodies while being constituted by sprockets 25, 26.

The first and second sprockets 22 and 23 are mounted so as to be shifted vertically with respect to the rotating shaft 24.
The first chain 22 is wound around first sprockets 25, 25 mounted on the rotating shafts 24, 24, respectively. Similarly, the second chain 23 is wound on the second sprockets 26, 25.
It is wound around 26.

The first and second chains 22 and 23 wound in this manner extend in parallel at a certain distance in the vertical direction, and are connected to one of the rotating shafts 24 and 24 by a driving source ( (Not shown).
Here, the first and second chains 22 and 23 correspond to the conveyor 1
The movement path is adjusted so as to move in parallel with the body-wrapped package 100 conveyed by zero.

The first chain 22 includes a body-wrapped package 100
A plurality of first opening / closing means 30 for expanding the extended end portion 100a from the inside are mounted at a fixed interval, while the second chain 23 is paired with the first opening / closing means 30. A plurality of second opening / closing means 31 for expanding the extending end portion 100a of the body-wrapped package 100 from the inside are mounted at regular intervals. The first and second opening / closing means 30, 3 are divided into the two chains 22, 23 having different heights as described above.
The reason why 1 is mounted is to prevent the opening / closing means 30 and 31 from interfering with each other during the opening / closing operation.

Although FIG. 1 shows the first and second opening / closing means 30 and 31 only for the wrapping drive mechanism 20 provided on one side of the conveyor 10, the wrapping mechanism provided on the other side is shown. Similarly, the first and second opening / closing means 30 and 31
Is installed.

FIG. 3 is a plan view of the packaging film end opening device according to this embodiment as viewed from the top. FIGS. 4 and 5 show the construction and operation of the first and second opening / closing means in an enlarged manner. FIG. 6 is a side sectional view of the first and second opening / closing means and the peripheral structure thereof as viewed from the left in FIG.

The first opening / closing means 30 includes a first rotating member 32, a first expanding member 33, and a first engaging member 34 as shown in FIGS. The first rotating member 32 has a “<” shape, and a substantially central portion is rotatably mounted on the first chain 22 via a support rod 35. here,
The first rotation member 32 is fixed to the tip of the support rod 35 as shown in FIG. 6, and is configured to rotate integrally with the support rod 35. A coil spring 37 is attached to the base end of the support rod 35 as shown in FIG. 6, and the first rotating member 32 and the support rod 35 are moved by the coil spring 37 in the opposite directions of FIGS. It is constantly biased clockwise and is always trying to open in the direction of arrow A in FIG.

In this embodiment, the first rotating member 3
2, the base end of the first auxiliary member 38 is connected to the connecting pin 3.
9 is attached to the first chain 22 rotatably.
Then, the tip of the first rotating member 32 and the first auxiliary member 38
Are pivotally connected to the base end of the first expanding member 33 by connecting pins 40 and 41, respectively.
Thus, the first rotating member 32, the first auxiliary member 38, and the first expanding member 33 form a parallel link mechanism, and can be moved horizontally while holding the first expanding member 33 in a fixed direction. It has a configuration that can be used.

The first expanding member 33 has a thin plate shape bent as shown in FIG. 6, and a portion from the center bent portion to the tip contacts the extended end portion 100 a of the body-wrapped package 100. An open piece 33a is formed. This expanding piece 33a
Are positioned so as to be arranged substantially on the same plane as the center of the body-wrapped package 100 conveyed in parallel.

The first engaging member 34 has a roller shape, and is rotatably mounted on the base end of the first rotating member 32. The first engagement member 34 has a function as a cam roller that engages with a cam surface of a first opening / closing guide unit 60 described later.

On the other hand, the second opening / closing means 31 corresponds to FIGS.
, The second rotating member 42, the second expanding member 43,
A second engaging member 44 is provided. The second rotating member 42 has a “<” shape that is symmetrical to the first rotating member 32, and the substantially central portion thereof is supported by the second chain 23 via the support rod 45.
Is mounted to be rotatable. Here, the second rotating member 4
2 is fixed to the tip of the support rod 45 as shown in FIG.
It is configured to rotate integrally with the support rod 45. As shown in FIG. 6, a coil spring 46 is mounted on the base end of the support rod 45, and the second rotating member 42 and the support rod 45 are rotated by the coil spring 46 in the timepiece shown in FIGS. In the direction of arrow B in FIG.

In this embodiment, the second rotating member 4
2, the base end of the second auxiliary member 47 is connected to the connecting pin 4.
8, it is rotatably mounted on the second chain 23.
Then, the tip of the second rotating member 42 and the second auxiliary member 47
Are rotatably connected to the base end of the second expanding member 43 by connecting pins 49 and 50, respectively.
Thus, the second rotating member 42, the second auxiliary member 47, and the second expanding member 43 form a parallel link mechanism, and can move horizontally while holding the second expanding member 43 in a fixed direction. It has a configuration that can be used.

The second expanding member 43 has a bent thin plate shape as shown in FIG. 6, and a portion extending from the center bent portion to the tip comes into contact with the extended end portion 100a of the body-wrapped package 100. An open piece 43a is formed. This expanding piece 43a
Are positioned so as to be arranged substantially on the same plane as the center of the body-wrapped package 100 conveyed in parallel. That is, the expanding piece 43a of the second expanding member 43 and the expanding piece 33a of the first expanding member 33 are both arranged on the same plane.

The second engaging member 44 has a roller shape and is rotatably mounted on the base end of the second rotating member 42. The second engaging member 44 has a function as a cam roller that engages with a cam surface of a second opening / closing guide unit 61 described later.

The first opening / closing means 30 and the second opening / closing means 31 have a symmetrical structure, and the extended end portion 100a of the body-wrapped package 100 is expanded in pairs with each other. The distance between the first opening / closing means 30 and the second opening / closing means 31 is determined by the first or second opening / closing of the first or second chains 22 and 23 depending on the width of the conveyed body package 100. By changing the mounting position of the means 30, 31, it is possible to adjust as appropriate.

As shown in FIG. 2, the first opening / closing guide means 60 for opening / closing the first opening / closing means 30 and the second opening / closing guide means 60 are provided at an intermediate height between the first and second chains 22 and 23. Second opening / closing guide means 6 for opening / closing opening / closing means 31
1 is provided. FIG. 7 is a perspective view showing the shapes of the first and second opening / closing guide means.

As shown in FIG.
Consists of a first fixed cam plate 62 and a first movable cam plate 63. The first movable cam plate 63 is superimposed on the first fixed cam plate 62, and each of the cam plates 62, 63 is fastened by a fastener 64 such as a bolt.
Is integrated. A long hole 65 is formed in the fastening portion of the first movable cam plate 63 in the longitudinal direction. By loosening the fastener 64 and sliding the first movable cam plate 63 along the long hole 65, the first The fixed position of the first movable cam plate 63 with respect to the fixed cam plate 62 can be appropriately adjusted. As shown in FIG. 2, the first fixed cam plate 62 is fixed to a main body (not shown) of the packaging film end expanding device between the rotation shafts 24.

The second opening / closing guide means 61 is constituted by a second fixed cam plate, and is fixed to the main body (not shown) of the wrapping film end expanding device between the rotating shafts 24. The second opening / closing guide means 61 (hereinafter, also referred to as a second fixed cam plate 61) includes a first fixed cam plate 62 and a first movable cam plate 63.
The first opening / closing guide means 60 is disposed below and in parallel with the first opening / closing guide means 60.

The outer peripheral surface of each of the cam plates 61, 62, 63 forms a cam surface for opening and closing the first and second opening / closing means 30, 31 respectively, and the first fixed cam plate 62 or the first movable plate. The first engaging member 34 engages with the cam surface of the cam plate 63 as shown in FIG. 6, while the cam surface of the second fixed cam plate 61
The second engagement member 44 is engaged.

The cam surface of the first fixed cam plate 62 has a concave area 62a over a wide area on the side facing the conveying path of the body-wrapped package 100, and the cam surface and the movement of the first chain 22 in the concave area 62a. The distance from the route is long. Except for the concave region 62a, the distance between the cam surface and the movement path of the first chain 22 is kept short and constant.

A similar concave area 63a is formed on the cam surface of the first movable cam plate 63 on the side opposite to the conveying path of the body-wound package 100. It is smaller than the concave region 62a.

The cam surface of the second fixed cam plate 61 also has a recessed area 61a on the side facing the transport path of the body-wound package 100.
Is formed. In the concave area 61a, the cam surface and the second
The distance between the chain 23 and the moving path is long. Except for the concave area 61a, the distance between the cam surface and the movement path of the second chain 23 is kept short and constant.

As will be described later, the first expanding member 33 is in an open state while the first engaging member 34 moves in the concave area 63a of the first movable cam plate 63. On the other hand, while the second engaging member 44 moves in the concave area 61a of the second fixed cam plate 61, the second expanding member 43 is in an open state.

In this embodiment, the concave region 63a of the first movable cam plate 63 and the concave region 61 of the second fixed cam plate 61
a is set to the same length. Then, the fixing position of the first movable cam plate 63 with respect to the first fixed cam plate 62 is adjusted according to the distance between the first opening / closing means 30 and the second opening / closing means 31, so that the first engagement member 34 and the second engagement It is set so that the member 44 always performs the same operation. Thereby, the same opening / closing operation can be performed by the first expanding member 33 and the second expanding member 43 in a pair relationship.

The wrapping film end widening device of this embodiment has an extended end 100
Upper and lower guide plates (flat holding means) 70 and 71 for holding the expanded state of a are provided (see FIGS. 2 and 6).
Between these upper and lower guide plates 70 and 71, a gap 72 slightly larger than the thickness of the extended end 100a of the expanded body wound package 100 is formed.

The upper and lower guide plates 70 and 71 are
The upstream end is disposed at an arbitrary position within a section in which the second opening / closing means 30, 31 expands and moves the extension end 100a of the body-wrapped package 100. Along with the sealing device 2.

The extended end portion 10 of the body-wrapped package 100 which has been expanded and flattened by the first and second opening / closing means 30 and 31.
Oa is conveyed to the sealing device 2 by being sandwiched by the gap 72 between the upper and lower guide plates 70, 71, so that even if the first and second opening / closing means 30, 31 are detached, the seal is maintained in a flat state. The device 2 can be reached.

Next, the operation of the above-described packaging film opening apparatus will be described. The first and second chains 22 and 23 rotate continuously at a speed synchronized with the conveyor 10 (see FIG. 1). When the body-wrapped package 100 is conveyed at a constant interval by the conveyor 10, the expanding pieces 33a, 43a provided in the first and second opening / closing means 30, 31 are provided.
Are closed in a mutually closed state (see FIG. 5).
0 into the extension end 100a of the body-wound package 10
It moves in parallel with 0 (see FIGS. 1 and 3).

The first and second engaging members 34 and 44 provided on the first and second opening / closing means 30 and 31 respectively correspond to the first movable cam plate 63 and the second fixed cam plate 61 in the concave region 6.
3a and 61a, the coil springs 37 and 37 shown in FIG.
With the urging force of 46, the first and second opening / closing means 30, 31 open in the directions of arrows A and B in FIG.
The expansion pieces 33a and 43a of the above-mentioned form expand the extending end 100a of the body-wound package 100 in a planar manner to have a flat shape (see FIGS. 1 and 3).

While the first and second engaging members 34 and 44 are moving while engaging with the recessed areas 63a and 61a of the first movable cam plate 63 and the second fixed cam plate 61, respectively, And the second opening / closing means 30 and 31 keep the extended end portion 100a of the body-wrapped package 100 extended, while the extended end portion 100a of the body-wrapped package 100 is
It enters the gap 72 between 0 and 71 (see FIG. 6). Therefore, the extended end portion 100a of the body-wrapped package 100 is conveyed to the sealing device 2 while being held in the expanded state by being sandwiched between the upper and lower guide plates 70 and 71.

The first and second engaging members 34 and 44 provided on the first and second opening / closing means 30 and 31 are connected to the body-wrapped package 10.
After moving a fixed distance in parallel with the first movable cam plate 63, the concave regions 63a, 63a,
Exit from 61a. When the first and second engaging members 34 and 44 move by engaging with cam surfaces other than the recessed areas 63a and 61a, as shown in FIG.
Reference numerals 0 and 31 indicate that the expanding pieces 33a and 43a are closed from each other.

When the first and second opening / closing means 30 and 31 rotate along the first and second sprockets 25 and 26 provided on the downstream side to change the moving direction, each of the expanding pieces 3 of the same means is rotated.
3a and 43a are extended ends 100a of the body-wound package 100.
And move up again.

The present invention is not limited to the above embodiment. For example, as the endless wrapping body constituting the moving means, various mechanical elements that can constitute the wrapping drive mechanism, such as a belt and a rope, can be used other than the chain. In addition, the rotating body supporting the endless winding body can be provided not only at both ends of the winding driving mechanism but also at an intermediate part thereof.

In the above-described embodiment, each of the expanding pieces 33a, 43a provided in the first and second opening / closing means 30, 31 is used.
Are arranged on the same plane with each other.
43a may be slightly displaced vertically so that they can be overlapped with each other in a closed state. By doing so, each of the expanded pieces 33a, 43a in the closed state
Can be made smaller, and each of the expanded pieces 33a, 4 is also provided in the extended end portion 100a of the narrow body-wrapped package 100.
3a can be inserted.

[0058]

As described above, by incorporating the packaging film end expanding device of the present invention into a packaging device, the extending end of the package can be extended without stopping the transport operation of the body-wrapped package. The work of opening and flattening can be performed, and the lead time of the packaging work can be shortened and the speed of the packaging work can be increased.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an outline of a packaging system incorporating a packaging film end opening device according to an embodiment of the present invention.

FIG. 2 is a configuration diagram of the packaging film end opening device as viewed from the front.

FIG. 3 is a configuration diagram of the packaging film end opening device as viewed from above.

FIG. 4 is an enlarged plan view showing a configuration of the packaging film end opening device in a state where first and second opening / closing means are opened.

FIG. 5 is an enlarged plan view showing a configuration of the packaging film end opening device in a state where first and second opening / closing means are closed.

FIG. 6 is a side sectional view of the first and second opening / closing means and the peripheral structure of the packaging film end expanding device as viewed from the left in FIG. 3;

FIG. 7 is a view showing the first and second parts of the wrapping film edge expanding device.
It is a perspective view which shows the shape of an opening / closing guide means.

FIG. 8 is a perspective view showing a conventional packaging form.

FIG. 9 is a perspective view showing another conventional packaging mode.

FIG. 10 is a schematic diagram showing a conventional packaging device for realizing the packaging form shown in FIG.

[Explanation of symbols]

 1: packaging film end opening device 2: sealing device 10: conveyor 20: winding drive mechanism 21: rotating body 22: first chain (endless winding body) 23: second chain (endless winding body) 24 : Rotating shaft 25: first sprocket 26: second sprocket 30: first opening / closing means 31: second opening / closing means 32: first rotating member 33: first expanding member 34: first engaging member 35: support rod 37: coil spring 38: first auxiliary member 42: second rotating member 43: second expanding member 44: second engaging member 45: support rod 46: coil spring 47: second auxiliary member 60: first opening and closing Guide means 61: second open / close guide means (second fixed cam plate) 62: first fixed cam plate 63: first movable cam plate 70, 71: vertical guide plate 72: gap

Claims (6)

[Claims] 1. A package film is wound around the outer surface of an article, and a seam of the wound package film is heat-sealed to be formed into a tubular shape, and both ends of the packaging film extend from both ends of the article. A packaging film end expanding device for expanding and flattening an extended end portion of the packaging film with respect to a body-wrapped package to be output, comprising: a conveyance unit for the body-wrapped package; A moving means that moves substantially parallel to the conveying path of the same means, and is attached to the moving means so as to be openable and closable, moves in parallel with the conveyed body winding package, and extends the body winding package. A plurality of pairs of first and
A second opening / closing means, a first opening / closing guide provided along a movement path of the first opening / closing means, and opening / closing the opening / closing means; a second opening / closing means provided along a movement path of the second opening / closing means; And a second opening / closing guide means for opening and closing the packaging film. 2. The packaging film end expanding device according to claim 1, wherein the moving means comprises an endless winding body wound between at least two rotating bodies, and wherein the first opening / closing guide means is provided. A cam surface that opens the first opening / closing means at a predetermined position on a movement path parallel to the body-wrapped package and closes the second opening / closing guide at another predetermined position; A cam surface that opens at a predetermined position on a movement path parallel to the body-wrapped package and has a cam surface that closes at another predetermined position, wherein the first opening / closing means is rotatably mounted on the endless winding body. A first rotating member, a first expanding member provided at one end of the first rotating member for expanding an extended end of the body-wrapped package from inside, and a first expanding member provided at the other end of the first rotating member. A first engaging member engaged with a cam surface of the first opening / closing guide means. The second opening / closing means includes a second rotating member rotatably mounted on the endless winding body, and an extended end provided on one end of the second rotating member, the extending end of the body-wrapped body being inward. And a second engaging member provided at the other end of the second rotating member and engaged with a cam surface of the second opening / closing guide means. Film edge spreader. 3. The packaging film end opening device according to claim 2, wherein the endless winding body is formed by first and second endless winding bodies wound around the common rotating body while being shifted in position. A first rotating member of the first opening / closing means is mounted on the first endless winding body, and a second rotating member of the second opening / closing means is mounted on the second endless winding body. A packaging film end expanding device, wherein the first and second expanding members in the first and second opening and closing means are arranged to be opened and closed on substantially the same plane. 4. The packaging film end expanding device according to claim 1, wherein the moving unit, the first and second opening / closing units, and the first and second units.
The opening / closing guide means is provided corresponding to each extended end formed at both ends of the body-wound package transported by the transporting means, respectively. 5. The wrapping film end expanding device according to claim 1, wherein the wrapping film end expanding device is disposed upstream of a sealing device for thermally fusing the extending end of the body-wrapped package. A packaging film end opening device, wherein a downstream end of the moving means is arranged near the sealing device. 6. The package film end expanding device according to claim 1, wherein the first and second opening / closing means extend the end portion of the body-wrapped package. Characterized in that a flat holding means having a continuous gap for holding a flat state across the extended end of the body-wrapped package is provided along the end of the packaging film.