JP3405436B2 - Film folding device in packaging equipment - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is designed to load a product to be packaged, spread the film drawn from a film roll, form the film into a tubular shape, and cover the product to be packaged. The bottom of the package is overlapped and sealed at the bottom, the tubular film is cut with a cutter between the objects to be packaged, and the front and rear parts of the tubular film cut by the cutter are packaged. The present invention relates to a film folding device that folds along the bottom surface of a film.

[0002]

2. Description of the Related Art Conventionally, a film drawn from a film roll is stretched and formed into a tubular shape to cover an article to be packaged, and both end edges of the film are superposed on the bottom of the packaged article to seal the bottom, A film fold that cuts a tubular film between the objects to be packaged with a cutter and folds the excess film at the front and rear of the tubular film cut by the cutter along the bottom surface of the object to be packaged. The device is, for example, Japanese Utility Model Publication No. 1-168403 or Japanese Utility Model Publication No. 2-318.
No. 01 publication and the like are proposed.

The folding device in these packaging devices cuts a tubular film between the objects to be packaged by a cutter, and cuts excess film portions at the front and rear of the cut tubular film. The suction mechanism provided below the object to be packaged conveys the object to be packaged while pulling the front and rear parts of the tubular film downwards, so that the film is folded at the bottom of the object to be packaged. Then
In the front film, the front film is folded along the bottom of the front part of the film in a manner that naturally follows by conveying the packaged product as it is, and in the rear film, it is faster than the transfer speed of the packaged product. Is also folded along the lower side of the article to be wrapped while entwining the rear film with a chain roller that rotates at high speed.

[0004]

As described above, in the folding device of the conventional packaging device, since a large suction mechanism is provided for folding the excess film, the problem of noise of this suction mechanism and There is a problem that the front and rear ends of the film are not reliably sucked. There is also a problem that the cost required for the suction mechanism and the chain roller having a complicated structure is too high.

Further, since the front and rear films are folded by the pulling force of the film by the suction mechanism, the extension tension of the film is weak and wrinkles may occur on the film on the surface of the package, and especially the stretch film is stretched. In the case of a package formed by this type of packaging device using a film, the unsightly appearance of the packaging reduces the willingness to consume, and the packaging device is required to have good finished quality. Is becoming.

Therefore, the present invention has a simple structure without providing a large-scale suction mechanism or a complicated chain roller structure, enables reliable film folding, and has a clean finish on the surface of the packaging device. Is intended to provide.

[0007]

In order to achieve the above object, the present invention has a carrying-in mechanism for carrying in an object to be packaged and a film feeding mechanism for transferring a film drawn from a film roll in the same direction as the object to be packaged. And a bag-making mechanism that guides both edges of the film to the lower side of the object to be packaged to form a film in a tubular shape, and a bottom sealing mechanism that seals both edge edges of the film by overlapping at the bottom of the object to be packaged, A cutter mechanism that cuts a tubular film between the objects to be packaged, and a pair of pairs of front and rear portions of the tubular film that are provided before and after the cutter mechanism and cut by the cutter mechanism. A film sandwiching body composed of rollers, and front and rear portions of the film are inserted into and guided by the film sandwiching body provided in front of and behind the cutter mechanism corresponding to the film sandwiching body. The pushing plate, and the front and rear portions of the film inserted into the film holding body by the pushing plate, the folding operation of the film and pulling the film holding body toward the lower side of the package together with the folding operation of the film. A rotation mechanism for rotating the roller is provided.

Further, a carrying-in mechanism for carrying in the article to be packaged, a film feeding mechanism for transporting the film pulled out from the film roll in the same direction as the article to be packaged, and both end edges of the film to the lower side of the article to be packaged. A bag-making mechanism for guiding and forming a tubular film, a bottom sealing mechanism for overlapping and sealing both end edges of the film at the bottom of an article to be packaged, and a tubular film formed between the articles to be packaged. A front part composed of a cutter mechanism for cutting and a pair of rollers for sandwiching the front part of the tubular film provided on the front side of the cutter mechanism with respect to the transfer direction of the packaged object and cut by the cutter mechanism.
And the film holding member of, push plate for guiding insertion of the front portion of the film in Huy <br/> Lum holding member of the front disposed in front of the cutter mechanism in response to the film holding member of said front And a front portion of the film inserted into the front film sandwiching body by the pushing plate so as to pull and drive the front portion of the film toward the lower side of the package while transferring the package. the rollers of the front of the film holding member is provided with a rotating mechanism for rotating.

Further, a carrying-in mechanism for carrying in the article to be packaged, a film feeding mechanism for transporting the film pulled out from the film roll in the same direction as the article to be packaged, and both end edges of the film to the lower side of the article to be packaged. A bag-making mechanism for guiding and forming a tubular film, a bottom sealing mechanism for overlapping and sealing both end edges of the film at the bottom of an article to be packaged, and a tubular film formed between the articles to be packaged. A rear part including a cutter mechanism for cutting and a pair of rollers for sandwiching the rear part of the tubular film provided on the transfer side of the cutter mechanism with respect to the transfer direction of the packaged object and cut by the cutter mechanism.
And the film holding member of the push plate to the rear of the insertion guide of the film in Huy <br/> Lum holding member of said rear provided corresponding to the film holding member of the rear in the transport side of the cutter mechanism, wherein Rotation for rotationally driving the roller of the rear film sandwiching body so as to pull and drive the rear portion of the film inserted into the film sandwiching body by the pushing plate toward the lower side of the package with the folding operation of the film. It has a mechanism.

Further , one provided on the film holding body.
A pair of rollers are pressed elastically via springs
It is arranged in .

Further, the pressure contact force between the rollers is adjusted to
Adjustable by selecting the elastic force of the ring.
It is provided .

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION A carry-in mechanism for carrying in an object to be packaged in which contents such as foods are stored in a tray, and a left and right side for transferring a film drawn out from a film roll in the same direction as the object to be packaged. A film feeding mechanism consisting of a pair of endless belts, a bag-making mechanism for guiding both end edges of the film to the lower side of the article to be packaged to form the film into a tubular shape, and both end edges of the film at the bottom of the article to be packaged. A bottom sealing mechanism for overlapping and sealing, a guillotine-like cutter mechanism for cutting a tubular film between the objects to be packaged, and a tubular shape provided before and after the cutter mechanism and cut by the cutter mechanism. And a film holding body which is provided in front of and behind the cutter mechanism corresponding to the film holding body and which holds the front and rear portions of the film. A pushing plate that inserts and guides the front portion and the rear portion of the film, and the front portion and the rear portion of the film that are inserted into the film holding body by the pushing plate are transferred to the lower side of the package together with the transfer of the package. Since the rotation mechanism that rotationally drives the roller of the film holding body is driven so as to pull the film toward the front, the front and rear portions of the film are moved downward by the rollers of the front and rear film holding bodies. Since the folding is performed while pulling with a predetermined force, the package can be formed without causing wrinkles of the film on the surface of the package.

Also, when the film is folded,
Pull the excess film part toward the lower side of the package
So as to move the pair of rollers of the film holding body.
A rotation mechanism that drives rotation is provided, and a pair of rollers
They are elastically pressed together by springs with a predetermined pressing force.
To maintain the film in the downward direction
Since the folding is performed while pulling with a predetermined force, the packaging
Form a package without generating film wrinkles on the surface
can do.

Further, the pressure contact force of the rollers is
Adjustable by selecting the elastic force of the ring.
By being provided, for example, food etc. can be placed on a tray.
In the packaged items that are stored, the material of the tray and the stored
Depending on the type of contents or the type of film,
You can adjust and set the tension of the rum,
The film can be folded well.

[0015]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 14 show an embodiment of the present invention.

In the packaging apparatus of the present invention, generally, a tray T is provided with a loading mechanism 2 for loading a packaged object 1 containing contents W such as food, and a film F made of a stretch film pulled out from a film roll R. A film feeding mechanism 3 for moving in the same direction as the object to be packaged 1, and a film F.
A bag-making mechanism 4 that guides both edges of the film F to the lower side of the article to be packaged 1 to form a film F into a tubular shape, and a bottom sealing mechanism 5 that seals both edge edges of the film F by superimposing them on the bottom of the article to be packaged 1.
And a guillotine-like cutter mechanism 6 for cutting the tubular film F between the objects to be packaged 1, and a front part of the tubular film F provided before and after the cutter mechanism 6 and cut by the cutter mechanism 6. The folding mechanism 7 is configured to fold the F1 and the rear portion F2 along the bottom surface of the object to be packaged 1, and the unloading mechanism 8 to unload the packaged object B into which the object to be packaged 1 is film-wrapped.

The carry-in mechanism 2 is an endless chain conveyor 9
The convex conveyors 10 that can stand and tilt at a predetermined interval are provided, and the chain conveyor 9 is rotated to sequentially feed the objects to be packaged 1 toward the film feeding mechanism 3 at equal intervals. The transport convex portion 10 is in an upright state when the transport convex portion 10 is located on the transport surface, and is in a state in which the object to be packaged 1 can be transported. When it is located on the opposite side of the plane, it is tilted so as to be continuously rotated.

The film feeding mechanism 3 spreads the film F drawn from the film roll R supported on the upper part of the packaging apparatus and spreads the film F at a substantially same speed in the same direction as the object 1 to be packed which is carried in by the carry-in mechanism 2. The film feeding mechanism 3 is provided with an endless belt body 11 whose both ends are supported by rotating rolls, and the endless belt body 11 is placed by vertically stacking the belts to each other. Which are provided in contact with each other are respectively provided on the left and right with respect to the traveling direction of the article to be packaged 1. The endless belt body 11 is installed so as to be inclined downward in the traveling direction of the article to be packaged 1. The film F is sandwiched between the overlapping belt surfaces of the left and right endless belt members 11 at both end edges in the width direction, and is conveyed in the traveling direction of the object to be packaged 1 and conveyed. The film F is gradually covered from above.

On the transfer direction side of the carry-in mechanism 2, there are provided side belt conveyors 12 which rotate in opposite directions and nip and carry the side surface of the article to be packaged 1.
The side belt conveyor 12 conveys the article to be packaged 1 and the tubular film F from the rear end to the front of the unloading mechanism 8.

The bag making mechanism 4 guides and conveys both left and right edges of the film F conveyed by the film feeding mechanism 3 toward the center of the bottom of the article to be packaged 1, and the side belt conveyor 12 The film guide rod 13 is attached to the carry-in side.

The film guide bar 13 has a vertical portion 13A from the upper side to the lower side on the carry-in side, is bent at a position slightly lower than the carrying surface of the article to be packaged 1, and is horizontal from the carry-in side to the carry side. The left and right endless belt members 11 of the film feeding mechanism 3 described above are formed on the left and right sides in a shape having the portion 13B from both side edges having the film opening portions toward the central portion having the bottom sealing mechanism 5. The width is gradually narrowed so as to squeeze F. This film guide bar 1
The left and right edges of the film F with respect to the article to be packaged 1 are guided toward the center of the bottom of the article to be packaged 1 by the bag-making device 4 including 3 to form the film F into a tubular shape.

The bottom sealing mechanism 5 is for overlapping and sealing the both edges of the film F guided to the center of the bottom of the article to be packaged 1 by the bag making mechanism 4, and the left and right arranged in contact with each other. It is composed of a pair of seal rolls 14. The bottom of the film F is sealed by sandwiching and transporting the film F in which both edges of the film F are superposed between the seal rolls 14. Especially, when the material of the film F is self-compressible. It is not necessary to have a heater function, but in some cases the seal roll 14
It may be configured to have a heater function to improve the adhesion.

The cutter mechanism 6 cuts the tubular film F, which is formed by sealing the film F at the bottom by the bottom sealing mechanism 5, before and after the object to be packaged 1, and is provided on the conveying surface of the object to be packaged 1. It is a guillotine type in which a saw-shaped cutting blade 15 is provided above and the cutting blade 15 is provided so as to be movable up and down.

A receiving plate is installed below the conveying surface at the position corresponding to the cutting blade 15 so as to be slightly offset from the position corresponding to the cutting blade 15 back and forth, and moves up and down in response to the vertical movement of the cutting blade 15. 16 are provided. That is, when cutting, the lower receiving plate 16 is raised in response to the lowering of the cutting blade 15, and when the cutting blade 15 is raised after cutting, the receiving plate 16 is raised.
Is configured to descend and retract. By doing so, at the time of cutting, the cutting blade 15 and the receiving plate 16 approach toward the tubular film F, and then the cutting blade 15 and the receiving plate 16 overlap each other in the vertical direction, and the tubular film located between them. Since F is cut, good and reliable cutting can be performed.

The folding mechanism of the present invention 7, the front part of the film clamping member 18 and the rear portion of the film, each for holding the excess film of the front F1 and rear F1 cut composed of a pair of rollers 17 by the cutter mechanism 6 From the holding body 19 and the push-in plate 20 provided in front of and behind the cutter mechanism 6 and corresponding to the front film holding body 18 and the rear film holding body 19 and inserting and guiding the front portion F1 and the rear portion F2 of the film. It is composed.

For the sake of explanation, with respect to the tubular film F containing the article to be packaged 1 that has been cut by the cutter mechanism 6, the transfer direction side of the article to be packaged 1 is the front part F1, and the front side in the transfer direction is the rear part F.
2 will be defined, and the following description will be made in a unified manner.

The pushing plate 20 is attached integrally with the cutting blade 15 of the cutter mechanism 6, the cutting plate member extending downward in response to the position of the front of the film clamping member 18 and the rear of the film clamping member 19 The cutting blades 1 are attached to the front and rear of the blade 15 at a predetermined interval, and are used for cutting the film F.
The lower part F moves together with the lowering operation of 5, and the front part F1 and the rear part F2 of the cut film F are inserted and guided toward the film holding bodies 18 and 19.

Front and rear film holding members 18, 19
Has a similar configuration, a pair of rollers 17 are provided in an opposed state, the shaft center of one roller 17 is fixed to the holding frame 21,
To the holding frame 21 on the axis of the other roller 17 is rotatably supported by the separable movable moving frame 22, the and the holding frame 21 and the moving frame 22 by hooking the spring S to each other is supported on the moving frame 22 The roller 17 of the holding frame 21
It is configured so as to be elastically pressed against, and the end of the front portion F1 or the rear portion F2 of the film F is pinched between the rollers 17 together with the pushing plate 20, and then only the pushing plate 20 of the cutting blade 15 The front portion F1 of the film F that has left the space between the rollers 17 and has come out of the rollers 17 with the rise
And the rear part F2. But fill-<br/> arm holding member 18 and the rear of the film clamping member 19 is the roller 17 the upper end of this front portion, which is arranged substantially equal, or slightly below the bottom surface of the packaged articles 1 (conveying surface) is there.

The front portion of the <br/> film clamping member 18 upon folding of the front F1 of the film F, while clamping the front F1 of the film F to the front of the film clamping member 18 without particularly providing the moving mechanism The front portion F1 of the film F is naturally bent along the bottom surface of the article to be packaged 1 by conveying only the article to be packaged 1.

[0030] Then, in this front portion of the film clamping member 18, the packaged front F1 of the film F which the plugged by pushing plate 20 to the front of the film clamping member 18 together with the transport of the package 1 The roller 1 of the film holding body 18 at the front portion is driven so as to be pulled and driven toward the lower side of the article 1.
A rotating mechanism 23 for rotating 7 is provided.

[0031] In this case, the rotation mechanism 23 of the front portion of the film clamping member 18, the fixed side and a holding frame 21 side roller 17
The driven pulley portion 24 is provided at the end of the
An endless cord-shaped belt 27 is stretched over the drive pulley 26 provided on the. The power shaft 25 rotates along with the transfer of the article to be packaged 1 by the side belt conveyor 12 to rotate the drive pulley 26. The rotation of the drive pulley 26 causes the driven pulley portion via the string belt 27. 24 is rotated, and the roller 17 coaxial with the driven pulley portion 24 is rotated,
The front portion F1 of the film F is transported by the predetermined tensile force by the frictional force between the front surface F1 of the film F sandwiched between the rollers 17 that are rotationally driven to face each other. The folding is performed while pulling toward the lower side of 1. Therefore, the pulling force causes the front portion F1 of the film F to be folded while exerting the spreading tension, and thus the packaging body B having a good appearance quality can be formed without causing the wrinkles of the film F on the surface of the packaging body B. You can

On the other hand, when folding the rear F2 of the film F is different from the simple folding of the front F1 of the film F, the rear portion of the film sandwiching member 19 for the rear F2 folding the film F
Need to be moved to the transfer direction side of the article to be packaged 1.

[0033] In the present embodiment is provided with a horizontal moving mechanism 28 that moves independently of the rear portion of the film sandwiching member 19 in the transport direction of the articles to be packaged 1.

The horizontal movement mechanism 28 is provided with a slide shaft 29 provided in parallel with the conveying direction of the article to be packaged 1, and is penetrated by the slide shaft 29 so as to be slidable along the slide shaft 29. A slide body 30 is provided, the rear- side film holding body 19 is attached to the slide body 30, one end is connected to the slide body 30, and the other end is elastically attached to the circumferential surface of the rotating cam plate 31. Is provided, and an actuating rod 32 having a central portion as a fulcrum of rotation is provided, and a cam plate 31 rotating with the raising and lowering motions of the cutting blade 15 causes the film holding body 19 at the rear portion to move in the horizontal direction via the actuating rod 32. That is, it is provided so as to be movable in parallel with the transfer direction of the article to be packaged 1.

[0035] Specifically, the cutting blade 15 and the push plate 20 is lowered in the cutter mechanism 6, the front F1 and rear F2 of the cut film F, the front portion of the film sandwiching member 18 and the rear portion of the film sandwiching member Plug 19 is guided is sandwiched front of <br/> film clamping member 18 and the rear portion of the film sandwiching member 19, after the push plate 20 and the cutting blade 15 is raised, the rear of the film clamping member 19 in the conveying direction The shape of the cam plate 31 is set so as to move horizontally.

[0036] At this time the packaged object 1 is in the stop state, the only the rear portion of the film sandwiching member 19 which sandwiches rear F2 of the film F is moved to the transfer direction of the package 1, the rear portion F2 of the film F is to be It will be folded along the bottom surface of the package 1.

[0037] In this case, in the present invention apparatus, the rear portion of <br/> film clamping member 19, with the movement of the rear part of <br/> film clamping member 19 by the horizontal moving mechanism 28, the rear portion of the fill- A rotating mechanism 33 for rotating and driving the roller 17 of the gripping body 19.
Is provided.

The rotating mechanism 33 of the roller 17 of the rear part of the film clamping member 19 is meshed with the gear 34 and the gear 34 provided on an end portion of the holding frame 21 side of the roller 17 is stationary, the packaging device A rack body 36 is provided on the machine base 35 so as to have a predetermined length substantially parallel to the transport direction of the article to be packaged 1. It is necessary to fold the operation of the rear F2 of the film F by way rear of the film clamping body 1
With the horizontal movement of the article to be packaged 9 in the transfer direction, the gear 34 of the roller 17 rotates while meshing with the rack body 36,
The roller 17 is rotated, and the rear portion F2 of the film F is held at a predetermined tensile force by a frictional force between the roller 17 and the surface of the rear portion F2 of the film F sandwiched between the rollers 17 that are arranged to rotate. The folding will be performed while pulling downward.

Thus, the rear portion F2 of the film F can be easily folded, and the rear portion F2 of the film F can be folded while pulling the rear portion F2 of the film F downward with a predetermined force. The package B can be formed without causing wrinkles.

Further, the roller of the rear of the film clamping member 19 with the horizontal movement of the rear of the film clamping member 19 17
Since but rotates rear F2 of the film F to pull towards the lower the packaged articles 1, that produce rotational driving of the roller 17 of the rear portion of the film sandwiched body 19 by a single driving source for the horizontal movement This also makes it possible to simplify the structure.

The operation of the device of the present invention will be described below with reference to FIGS. 8 to 14. The film F into which the object to be packaged 1 is loaded and transferred in the same direction as the object to be packaged 1.
The film F containing the article 1 to be packaged, which is formed into a cylindrical shape and has a bottom seal, is carried to the position of the cutter mechanism 6 which is a cutting position, and when the film F is transferred between the articles 1, the side belt conveyor 12 Is stopped and the cutter mechanism 6 is activated. The film F loaded at this time is in a state in which the front side F1 of the film F of the object to be packaged 1 in front is already folded.

When the cutting blade 15 and the pushing plate 20 are lowered integrally, the cutting blade 15 first comes into contact with the film F, the film F is cut, and then the pushing plate 20 at the front and rear is brought into contact with the film F by further lowering. contact, roller 17 of the front F1 and rear F2 is front of the film clamping member 18 and the rear portion of the film sandwiching member 19 of the cut film F
It is guided toward between and pushed in against the pressure contact force of the spring S (see FIGS. 8 and 9).

[0043] Then, the cutting blade 15 and the front and rear of the push plate 20 is homolog to rise, only the front F1 and rear F2 of the film F is the front of the film clamping member 18, sandwiched rear portion of the film sandwiching member 19 The state remains (see FIG. 10).

Next, with respect to the article to be packaged 1 which is in a stopped state due to the operation of the horizontal moving mechanism 28, the film holding body 1 at the rear part is provided.
Only 9 moves in the transport direction. The rotating mechanism 33 described above provided in the rear portion of the film sandwiching member 19 at this time,
The rear F2 of the film F rotates roller 17 with the movement of the rear of the film clamping member 19 along a bottom surface of the packaged object 1 while pulling toward the lower packed material 1 performs fold (Figure 11, (See FIG. 12). In this way, the rear portion F2 of the film F can be easily folded, and the rear portion F2 of the film F is folded while pulling the rear portion F2 of the film F downward with a predetermined force, so that the wrinkle of the film F is formed on the surface of the package B. The package B can be formed without causing it.

[0045] Then the side belt conveyor 12 drives the packaged articles 1 conveyed along with the film F, subsequent to the front of <br/> film clamping member 18 in a state sandwiching the front F1 of the film F of the packaged articles 1 are transported, a front F1 of the film F so packaged articles 1 are transported relative to fixedly front of the film clamping member 18 provided is naturally the packaged object 1 Fold along the bottom. The rotation mechanism 23 described above this time provided on the front of the full <br/> Ilm clamping member 18, to be packaged front F1 of the film F rotates roller 17 in association with the transport of the packaged articles 1 1 Folding is performed along the bottom surface of the article to be packaged 1 while pulling downward.
Further, the front article to be packaged 1 is transferred toward the unloading mechanism 8 as a completed package B in which the front portion F1 and the rear portion F2 of the film F are folded (see FIGS. 13 and 14). In this way, the front portion F1 of the film F is folded while pulling it downward with a predetermined force, so that the package B can be formed on the surface of the package B without wrinkling of the film F. it can.

In this embodiment, the cutter mechanism 6 is constructed by providing the cutting blade 15 and the pushing plate 20 on the upper portion and the receiving plate 16 at the lower position corresponding to the cutting blade 15. The receiving plate may be provided on the upper part and the cutting blade may be provided on the lower position corresponding to the position of the receiving plate, or the receiving plate may be provided both before and after the cutting blade.

Further, by appropriately selecting the contact force of the rollers 17 of the film holding bodies 18, 19 between the holding frame 21 supporting the rollers 17 and the movable frame 22, the elastic force of the spring S is selected. Can be adjusted. By doing so, the pulling force of the film F at the time of folding can be adjusted, and the tension of the film F can be adjusted according to the material of the tray T and the type of the contents W to be stored.
That is, when it is desired to increase the pulling force of the film F to form a tight package B, the elastic force of the spring S is increased to increase the pressure contact force between the rollers 17 of the film holding bodies 18 and 19. The film F sandwiched between the rollers 17 is made less slippery, and the pulling force of the film F toward the lower side is strengthened for folding. On the contrary, when the contents W or the tray T to be packaged are weak and easily crushed, it is necessary to form the soft package B. In this case, the elastic force of the spring S is weakened to make the film sandwich 1
Roller 1 of 8 and 19 rollers 17
The film F sandwiched between 7 is made slippery so that the film F
The pulling force to the lower side of the is weakened to perform the folding.

Further, in this embodiment, both the front portion F1 and the rear portion F2 of the film F are provided with a pair of rollers 17 respectively.
An example is shown in which the front and rear film holding members 18 and 19 are used to fold the film F while pulling the film F downward by the roller 17 which is rotationally driven. The film may be folded by the film holding body, and the other may be folded by another folding method (for example, a conventional chain belt or a suction mechanism). In this case, the pushing plate may be provided only on the front side or the rear side of the cutter mechanism corresponding to the film holding body.

In the present embodiment, when the rear portion F2 of the film F is folded, the conveyance of the article to be packaged 1 is stopped,
Only the film holding body 19 at the rear part is horizontally moved in the conveying direction of the object to be packaged 1 so that the rear part F2 of the film F is folded along the bottom surface of the object to be packaged 1.
While conveying the, or is horizontally moved at a higher speed than the conveying speed of the rear Huy <br/> Lum clamping member 19 in the conveying direction of the packaging 1, or be temporarily reversed move the packaged object 1 Alternatively, the rear portion F2 of the film F may be folded.

The horizontal moving mechanism 28 is driven by the cam plate 31 and the operating rod 32, but a reciprocating mechanism such as a cylinder device may be used.

[0051]

As described above, according to the present invention, a packaging device having a simple structure without a large suction mechanism or a complicated chain roller and capable of reliable film folding and a clean finish of the packaging surface is provided. It is possible to provide the folding device.

[Brief description of drawings]

FIG. 1 is a side view showing the overall configuration of an embodiment of the present invention.

FIG. 2 is a plan view showing the overall configuration of an embodiment of the present invention.

FIG. 3 is a perspective view showing a film feeding mechanism of one embodiment of the present invention.

FIG. 4 is a front view showing a side belt conveyor and a cutter mechanism according to an embodiment of the present invention.

FIG. 5 is a side view showing a main part of one embodiment of the present invention.

6 is a plan view showing the front of the film holding member of the embodiment of the present invention.

7 is a plan view showing the rear of the film holding member of the embodiment of the present invention.

FIG. 8 is a diagram showing an operation in one embodiment of the present invention.

FIG. 9 is a diagram showing an operation in one embodiment of the present invention.

FIG. 10 is a diagram showing an operation in one embodiment of the present invention.

FIG. 11 is a diagram showing an operation in one embodiment of the present invention.

FIG. 12 is a diagram showing an operation in one embodiment of the present invention.

FIG. 13 is a diagram showing an operation in one embodiment of the present invention.

FIG. 14 is a diagram showing an operation in one embodiment of the present invention.

[Explanation of symbols]

1 to be packaged 2 carrying mechanism 3 film feeding mechanism 4 bag mechanism 5 bottom sealing mechanism 6 cutter mechanism 7 folding mechanism 17 roller 18 front film sandwiched body 19 of the rear portion of the film sandwiching member 20 pushing plate 23, 33 rotating mechanism 28 horizontally Moving mechanism 34 Gear 35 Machine stand 36 Rack body R Film roll F Film F1 Front part F2 Rear part

─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-63-178903 (JP, A) Actual Kaihei 1-168403 (JP, U) Actual Kaihei 2-31801 (JP, U) Actual Kaihei 3- 93405 (JP, U) Actual public 57-34961 (JP, Y2) Actual public 57-42802 (JP, Y2) Actual public 58-20498 (JP, Y2) (58) Fields investigated (Int.Cl. ⁷ , DB name) B65B 9/00-11/58

Claims (5)

(57) [Claims] 1. A loading mechanism for loading an article to be packaged, a film feeding mechanism for transporting a film pulled out from a film roll in the same direction as the article to be packaged, and both end edges of the film to the lower side of the article to be packaged. A bag-making mechanism for guiding and forming a tubular film, a bottom sealing mechanism for overlapping and sealing both end edges of the film at the bottom of an article to be packaged, and a tubular film formed between the articles to be packaged. A cutter mechanism for cutting, and a film holding body which is provided in front of and behind the cutter mechanism and which holds a front portion and a rear portion of a tubular film cut by the cutter mechanism, each of which includes a pair of rollers.
A push-in plate which is provided in front of and behind the cutter mechanism corresponding to the film sandwiching body and which guides the front and rear portions of the film into the film sandwiching body, and the film which is inserted into the film sandwiching body by the push-in plate. In the packaging apparatus, a rotation mechanism for rotationally driving the rollers of the film holding body is provided so as to pull and drive the front portion and the rear portion of the film toward the lower side of the object to be packaged together with the folding operation of the film. Film folding device. 2. A carrying-in mechanism for carrying in an object to be packaged, a film feeding mechanism for transferring a film pulled out from a film roll in the same direction as the object to be packaged, and both end edges of the film below the object to be packaged. A bag-making mechanism for guiding and forming a tubular film, a bottom sealing mechanism for overlapping and sealing both end edges of the film at the bottom of an article to be packaged, and a tubular film formed between the articles to be packaged. a cutter mechanism for cutting, the front portion of the off comprising a pair of rollers for pinching the front of the cutter mechanism in front provided in the cutter mechanism by the cut cylindrical toward the film with respect to the transport direction of the material to be packaged < br /> and Ilm holding member, and a push plate for the front of the insertion guide of the film to the film holding member of the front disposed in front of the cutter mechanism in response to the film holding member of said front, said Push Wherein the film holding member of the front to pull driven downward side of the articles to be packaged along with the transfer of the front of the objects to be packaged of said film plugged into a film holding member of the front by Inclusive plate A film folding device in a packaging device, which is provided with a rotation mechanism for rotationally driving a roller. 3. A carrying-in mechanism for carrying in an object to be packaged, a film feeding mechanism for transferring a film pulled out from a film roll in the same direction as the object to be packaged, and both end edges of the film below the object to be packaged. A bag-making mechanism for guiding and forming a tubular film, a bottom sealing mechanism for overlapping and sealing both end edges of the film at the bottom of an article to be packaged, and a tubular film formed between the articles to be packaged. a cutter mechanism for cutting, the rear of the off comprising a pair of rollers for pinching the rear part of the tubular film which has been cut by the cutter mechanism provided on the transfer side of the cutter mechanism relative to the transport direction of the articles to be packaged <br / > and Ilm holding member, and a push plate for the rear of the insertion guide of the film to the film holding member of said rear provided corresponding to the film holding member of the rear in the transport side of the cutter mechanism, the push Rotation for rotationally driving the roller of the film holding member of said rear to pull driven toward the lower side of the rear of the objects to be packaged with folding operation of the film of the film that is inserted into the film holding member by Inclusive plate A film folding device in a packaging device having a mechanism. Wherein said film claims from claim 1 to a pair of rollers between which is provided on the holding member via a spring, characterized by comprising disposed in repressive pressed state 3 Neu
The film folding device in the packaging device according to item 1 . 5. The pressure contact force between the rollers is set to the spring.
It can be adjusted freely by selecting the elastic force of
It is Te film folding device in the packaging device according to claim 4, characterized in.