JPH0257513A - Method for packaging with wrap film and packaging apparatus using same - Google Patents

Abstract

PURPOSE:To contrive the prevention of direct exertion of heat and pressure on an article to be packaged by enclosing the article moving in the horizontal direction from above and below by a folded wrap film provided in the upstream conveying position and fusing and cutting the upper and lower edges of the wrap film in the rearward direction. CONSTITUTION:A chain 2 is encircled clockwise, a wrapping roller 5 is moved to the left side while retaining a wrap film 11 at its central part and a wrapping bar 7 is projected toward the inside of the wrap film from the outside. When a gear 8 is rockably moved to the left side, the left end of a wrapping arm 1 is raised and the central part of the wrap film 11 is hung over the wrapping bar 7 and tensioned by the wrapping roller 5. When the chain 2 is encircled counterclockwise and the wrapping roller 5 is moved to the right side, an article 19 to be wrapped is enclosed with the wrap film 11 from above and below. The gear 8 is then rockably moved to the right side and a sealer 3 is moved upward by a lifting machine 20 into contact with a seal base 9, whereby the wrap film 11 is seal cut.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a method of automatically packaging foods and other items with a wrap film, and a packaging machine used in the method.

[Conventional technology] Conventional equipment for packaging foods, etc. using wrap film is
A known method is to use an elevator to push up and wrap the wrapped object from the lower side of the stretched wrap film, and then heat the lower part of the wrapped object to press the wrap film.

[Problems to be Solved by the Invention] Since the above-mentioned conventional device moves the enclosed object not only horizontally but also vertically, the device as a whole is large and heavy, so there are restrictions on where it can be installed. However, it was not something that could be easily installed at retail stores.

In addition, since the package is heated and crimped from below, the heat is applied directly to the contents, creating problems when packaging fresh foods.Additionally, the top of the package also needs to be pressed for crimping, which can cause soft foods. It is unsuitable for packaging such as products, and furthermore, it is not possible to seal completely by heat and pressure bonding, so there is a problem that it cannot be completely sealed.

The present invention solves these problems and provides a packaging method using a wrap film that does not apply direct heat or pressure to the packaged item during packaging, and is extremely lightweight and compact compared to the prior art. It is an object of the present invention to provide a packaging machine that overcomes the drawbacks.

[Means for solving the problem] The means for solving the problem is located between the wrap film supply roller and the take-up roller, as set forth in claims 1 and 2. The wrapping means is
a process in which the wrapping film is moved forward while holding the middle part of the wrap film to fit the wrapped item between the top and bottom of the wrap film; a process in which the middle part of the wrap film is held in the front; and a process in which the wrapping means moves upward and backward. A method for wrapping with a wrap film, which comprises a step of moving to wrap an object from above and below with the wrap film, and a step of welding and cutting the wrap film at the rear, a wrap film supply roller, a take-up roller, A wrapping means for holding an intermediate portion of the wrap film stretched between the two rollers, a means for moving the wrapping means in a front-back direction, a means for moving the wrapping means in an up-down direction, and a wrap film stacked vertically. A packaging machine having a means for welding and cutting the wrap film, and as described in claims 3 and 4, a roller is brought close to both sides of the wrap film that sandwiches the packaged item from above and below, and the wrap film is attached to the rollers. A wrapping method using a wrap film, which includes a step of bringing the wrap film into contact with the wrap film, a step of rotating the roller to extend the wrap film outward from the wrap film, and a step of welding the ends of the wrap film; A pair of rollers provided near both sides of the wrap film to be sandwiched from above and below, means for moving the rollers in the vertical direction, means for bringing the wrap film into contact with the rollers, and a means for rotating the rollers to This packaging machine has means for stretching the wrap film outwardly from the wrapped article and means for welding the ends of the wrap film.

[Operations] In the invention described in claims 1 and 2, the wrap film folded in the front in the moving direction wraps the wrapped object from above and below while moving the wrapped object in the horizontal direction, and wraps the wrapped object from above and below, Weld the top and bottom of the wrap film that wrapped the object with the tape and cut it.

In the invention as set forth in claims 3 and 4, the unwelded ends of the wrap film that wraps the wrapped object from above and below are welded while the roller pulls the wrapped object outward. Seal.

[Example] Figures 1 to 4 are side views showing an example of an apparatus used for carrying out the invention of claims 1 and 2, in which 1 is a wrapping arm, 2 is a chain, and 3 is a sheet. , 4 is a supply roller,
5 is a wrapping roller, 6 is a take-up roller, 7 is a rubbing bar, 8 is a gear, 9 is a seal base, 10 is a fulcrum of the wrapping arm, 11 is a wrapping film, 12.13.
14 is a roller, 15 and 16 are belts, 17 is a support arm, and 19 is an enclosure.

In FIG. 1, the wrap film is stretched from a supply roller 4 to a take-up roller 6 via a plurality of rollers. The middle part of the wrapping film is wrapped by a wrapping roller 5.
is held by.

The roughing roller 5 is fixed to the cheno 2 together with the seal base 9, and the cheno 2 can rotate around the roughing arm 1, so the lapping roller 5 moves around the cheno 2 as the chino 2 rotates. Move left/right in the figure.

A gear 8 is attached to the right end of the roughing arm 1, and when the gear 8 is swung leftward in the figure by a driving means (not shown), the left end of the roughing arm 1 rises around the fulcrum lO. It is configured.

Now, when the wrapped object 19 is placed in the position shown in FIG. 1, the sensor works and the belts 15 and 16 send the wrapped object 19 forward (to the left in the figure). At the same time, the chain 2 rotates clockwise, and the wrapping roller 5 moves to the left in the figure while holding the middle portion of the wrapping film 11. This moved state is shown in FIG. As shown in FIG. 2, when the wrapped item is sandwiched between the wrap film 11 from above and below, the wrapping bar 7 projects from the outside toward the inside of the wrap film. In this example, two roughing bars 7 are provided at symmetrical positions on both sides of the device, and when not in operation, they are retracted on both sides, and when in operation, the bars of appropriate length face toward the inside of the wrapping film. It has come to stand out. Subsequently, when the gear 8 swings to the left in the figure, the left end of the luffing arm (2) rises upward, resulting in the state shown in FIG. 3. At this time, the middle portion of the wrapping film 11 is hung on the roughing bar 7 and stretched through the wrapping roller 5 at the position shown in FIG. Subsequently, the cinch 2 rotates counterclockwise and the wrapping roller 5 moves to the position shown in FIG. 3B, so that the article 19 is almost wrapped from above and below by the wrapping film 11. Next, when the dea 8 swings to the right and the left end of the wrapping arm l descends, the sealer 3 is raised by the elevator 20 and comes into contact with the seal base 9, welding and cutting the wrapping film 11, as shown in FIG. At the same time, the wrapping bar 7 retracts to the outside of the wrapping film, so that the article 19 is wrapped on all sides. At this time, the wrap film 11 is also welded and connected on the right side of the figure, so the wrap film 11
The middle part of is held again by the rubbing roller 5.

5 to 9 are front views showing examples of devices used for carrying out the invention of claims 3 to 5, in which 31 is a stretch roller, 32 is a stretch roller lift, and 33 is a moving device. belt, 34 is a belt roller, 35 is a claw plate, 3
6 is an elevator, 37 is a stretch roller groove, 38 is a sealer, 41 is a wrapping film, and 49 is an enveloping material.

As shown in FIG. 5, when the wrapper 49 sandwiched between the wrap film 41 at the top and bottom is carried by the belt 33 and reaches a predetermined position, the elevator 32 moves the stretch roller 31 as shown in FIG. , and lowered to a position where it touches the end of the wrap film 41. Subsequently, as shown in FIG. 7, the elevator 36 raises the sealer 38 and the claw plate 35. Nail plate 3
5 and the stretch roller 31 are as shown in detail in FIG.
5 is a wrap film 41 between the stretch roller 31
is inserted into the groove 37 of the stretch roller 31, and the stretch roller 31 is rotated in the direction of the arrow in FIG. In this way, the stretch roller 31 stretches both ends of the wrap film 41 to the outside of the wrapped item 49, removes wrinkles and slack from the wrap film 41, and
Wrap the object 49 tightly. Next, when the sealer 38 rises to the position shown in FIG.
The wrap film 41 is welded and cut by the cutter 40. The wrap film 41 that has been stretched by the stretch roller 31 returns due to its elasticity.
Wrap it so that it tightly adheres to the object to be wrapped 49.

FIG. 10 is a diagram showing an example in which the device 51 of the embodiment of the invention of claim 2 and the device 52 of the embodiment of the invention of claim 4 are combined. can be sealed from all directions.

[Effects of the Invention] As is clear from the detailed explanation above, according to the present invention, since the article is packaged by moving it only in the horizontal direction over a short distance, the entire apparatus becomes compact.
There are no restrictions on where it can be installed, and it can be easily installed in stores, etc.

In addition, the wrap film is not heated at the location where heat is applied directly to the wrapped item, and is always welded on the sides, so no heat is transferred to the contents, making it suitable for packaging fresh foods, etc. Since the upper side of the packaged item is not pressed due to crimping, it is also suitable for packaging soft foods. Furthermore, the welded part of the wrap film can be heated sufficiently to completely weld, so the packaged item can be completely sealed, completely preventing leakage of contents and dirt from the outside. There are big advantages.

[Brief explanation of the drawing]

1 to 4 are side views showing an example of an apparatus used for carrying out the invention of claims 1 and 2, and FIGS. FIG. 10, a front view showing an example of an apparatus used for carrying out the invention, shows an apparatus 51 according to an embodiment of the invention according to claim 2 and an apparatus 5 according to an embodiment of the invention according to claim 4.
2 is a diagram illustrating an example of a combination of 2. 1...Wrapping arm, 2...Cheno, 3...
Sealer, 4... Supply roller, 5... Wrapping roller, 6... Winding roller, 7... Wrapping bar, 8
... Gear, 9 ... Seal base, 10 ... Fulcrum of roughing arm, 11 ... Wrap film, 12.
13.14...Roller, 15.16...Belt, 1
7... Support arm, 19... Wrapped object, 31... Stretch roller, 32... Elevator, 33... Belt, 34... Belt roller, 35... Claw plate, 36...・
・Elevator, 37... Stretch roller groove, 38...
・Sheila, 41... Wrap film, 49... Attorney representing the package Takao Yoshizawa No. 3 Figure 4 Figure = 104- Figure Figure Figure Figure Figure

Claims (1)

[Claims] 1. A wrapping means located between a wrap film supply roller and a take-up roller moves forward while holding the middle part of the wrap film to fit the wrapped item between the upper and lower parts of the wrap film. a step of holding an intermediate portion of the wrap film in front; a step of the wrapping means moving upward and backward to wrap the article from above and below with the wrap film; and a step of welding the wrap film at the rear. A wrap film wrapping method 2 comprising a cutting step, a wrap film supply roller, a take-up roller, a wrapping means for holding an intermediate portion of the wrap film stretched between the two rollers, and a wrapping method for moving the wrapping film forward and backward. A packaging machine 3 having a means for moving the wrapping device in the vertical direction, a means for moving the wrapping device in the vertical direction, and a means for welding and cutting the wrap films stacked above and below, and the vicinity of both sides of the wrap film that sandwich the wrapped item from above and below. a process of bringing a roller close to the roller and bringing the wrap film into contact with the roller, a process of rotating the roller to stretch the wrap film outward from the envelope, and a process of welding the ends of the wrap film. 4, a wrapping method using a wrap film comprising: a pair of rollers positioned near both sides of a wrap film that sandwich the packaged item from above and below; a means for moving the rollers in the vertical direction; and a means for moving the wrap film onto the rollers. A packaging machine 5 having a means for bringing the roller into contact, a means for rotating the roller to extend the wrap film outwardly of the wrapped object, and a means for welding the ends of the wrap film, the roller having a regular cross-sectional shape. The packaging machine according to claim 4, which has a rectangular shape.