JPH037283Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention is directed to the use of stretchable plastic films such as polyvinylidene chloride, which can be used to wrap packaged objects, especially foodstuffs and other products placed in trays or other containers. This invention relates to an unloading device for a packaging machine that wraps with film.

[Conventional technology]

In general, a packaging machine using stretch film is used to press the packaged item against the film by pushing up the packaged item supplied to the pedestal towards the film that is supplied to the packaging section and stretched. It has been proposed to wrap the film by folding the film under the packaged object using a folding tool while keeping it in a tensioned state, and then transporting the packaged object.

By the way, in this kind of packaging machine,
As disclosed in Japanese Patent No. 56-13308, a carry-out device is equipped with transfer rollers on the carry-out side of a carry-out belt having a heater, and the film folded under the package is brought into close contact with the package while being transferred on the carry-out belt. After that, it is sent by a transport roller.

[The problem that the idea aims to solve]

In the above-mentioned prior art, as shown in FIG. 5, the end of the film b supplied to the packaging section position is located at the lower part of the carry-out belt a having a heater, and during the folding operation of the film b,
The end of the film b moves along the lower surface of the carry-out belt a and is folded into the lower face of the package c, but in this case, the end of the film b comes into close contact with the lower face of the carry-out belt a and is wound around the carry-out belt a; This has caused a problem in that the film cannot be folded.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a delivery device for a packaging machine that can prevent the end of the film from coming into close contact with the delivery belt.

[Means to solve the problem]

The present invention includes a film feeding device that feeds out a roll of stretch film and transports it to a packaging section position;
A packaged article supply device that transfers the packaged article onto a pedestal; a pedestal lifting device that allows the pedestal to move up and down at a position below the packaging section; In the packaging machine, the packaging machine includes a film folding device for folding the film into the package, and a package delivery device; A carry-out belt that folds the end of the film onto the underside of the object to be packaged during the carry-out operation and brings the folded film into close contact with the underside of the object to be packaged, and is disposed between the fed end of the film and the carry-out belt. The conveyor belt is equipped with a cover for the conveyor belt.

[Effect]

With the above configuration, when the end of the film is folded into the front edge of the packaged object during the unloading operation, the end of the film is protected from contacting the unloading belt partitioned by the cover.

〔Example〕

2 and 3 show an overview of the overall configuration of a stretch film wrapping machine, in which the front side of the main body frame 1 is provided with objects to be packaged up to the lower part of the packaging section 2, which is approximately the middle part of the main body frame 1. A packaged article supply device A is provided with a conveyor 4 for conveying the packaged articles 3.

At the supply side end of the conveyor 4, there is provided a pedestal 5 on which the articles 3 to be packaged are fed and placed by the conveyor 4, and this pedestal 5 is connected to a lift 6 which is moved up and down by a drive section as appropriate. , and forms a pedestal lifting device B that stretches and holds the stretch film when the pedestal 5 is raised.

A roll body 8 in which a stretch film 7 is wound into a roll shape is rotatably held on the rear side of the main body frame 1, and both ends of the stretch film 7 pulled out from the roll body 8 are connected to a pair of upper and lower ends. A film feeding device C is disposed on both sides of the upper part of the main body frame 1 in the front-rear direction for transporting the film to the packaging section 2 by sandwiching it between the endless belts 9. At the end of the endless belt 9 on the side where the stretch film 7 is inserted, there is a cutter 10 for making perforations in the width direction of the stretch film 7, and a film holder 11 provided on both sides of the cutter 10. A device D is provided.

A rear folding body 12 that reciprocates along the length direction of the film 7 and left and right folding bodies 13 that can be mutually opened and closed along the width direction of the film 7 are provided on the packaging section 2 side of the main body frame 1. A film folding device E is provided which cuts the film 7 from the perforation position as the bodies 12 and 13 move and folds the film onto the bottom surface of the packaged object 3 pushed up by the pedestal lifting device B. .

On the upper side of the main body frame 1, there is a carry-out member 14 that moves forward in contact with the top surface of the package 3a, and a heater 15A that tightly contacts the film 7 at the bottom of the package 3a while placing and carrying out the package 3a. A carry-out device F is provided which includes a carry-out belt 15 with a conveyor belt 15 and a transfer conveyor 16.

The packaged items 3, such as trays containing products, are shown in Figure 4A~
As shown in FIG. 3B, the conveyor 4 of the packaged article supply device A transports the packaged articles from the front side of the main body frame 1 to the lower part of the packaging section 2, which is approximately in the middle, and is supplied and placed on the pedestal 5. At the same time as the object to be packaged 3 is transferred, the stretch film 7 pulled out from the roll body 8 by the film supply device C is directed from the rear side of the main body frame 1 to the packaging section 2 position, and a pair of upper and lower endless belts 9
The perforation 17 is cut by the cutter 10 of the film cutting device D during the transfer.
A series of stretch films 7 having perforations 17 formed therein as shown in FIGS. 4A to 4B are further transported to the packaging section 2 position. In this case, the end of the film 7 is connected to a pair of stopper members 1 at a lower position of the carry-out belt 15.
It is fixed by 8,18A.

In this way, as shown in FIG. 4B, the article to be packaged 3 is supplied onto the pedestal 5, and a series of stretch films 7 with perforations 17 are supplied to the packaging section 2, and the ends of the stretch films 7 are placed at the stopper. In the state fixed by the members 18 and 18A, the pedestal 5 is raised by the lift 6 of the pedestal lifting device B, as shown in FIGS. 4C to D, and the film 7 supplied to the packaging section 2 is pushed up from below. Then, the rear folding body 12 and the left and right folding bodies 13 slide along the bottom surface of the pushed-up object 3 to be separated from the perforation 17, and
Fold in the edges of film 7 from three sides. Thereafter, the end of the film 7 is released from the stopper members 18, 18A and is sent by the delivery member 14 onto the delivery belt 15 heated by the heater 15A. The end portion of the tray 9 is folded into the lower surface of the tray 9, and then the tray 9 is carried out while being closely attached by the heat of the carry-out belt 15, and transferred by the transfer conveyor 16. Note that the carry-out belt 15 is equipped with a heater 15.
Although a sheathed heater is shown that is formed so as to surround a heating plate with a built-in heating plate A, a sheathed heater may be built in the delivery 15 itself, and the heating means thereof may be selected as appropriate.

In this embodiment, as shown in FIGS. 1 to 3, the carry-in side of the carry-out belt 15 is
An auxiliary belt 20 is provided which is driven integrally with the
The end of the film 7 supplied to the packaging section 2 position at the lower position of the delivery belt 15 is held at the stopper member 1.
A cover 21 of the carry-out belt 15 is interposed between the end of the film 7 and the carry-out belt 15, and both ends of the cover 21 are fixed to the frame of the carry-out belt 15. 22 with screws 23. Then, as shown in FIG. 1A, a series of stretch films 7 with perforations 17 are supplied to the packaging section 2, and with the ends fixed by stopper members 18 and 18A, the stretch film 7 is placed on the pedestal 5. After the film 7 is raised and folded in three directions, the film 7 is removed from the stopper members 18, 18A as shown in FIG. 1B.
When the end of the film 7 is released and moved so as to be folded from the rear end of the auxiliary belt 20 into the front edge of the tray 19 as the tray 19 is transferred, the end of the film 7 is held by the cover 21. They are protected from coming into contact with the partitioned delivery belt 15. This prevents the problem of the end of the film 7 coming into close contact with the heated delivery belt 15 and getting caught in the delivery belt 15 from between the delivery belt 15 and the auxiliary belt 20, as shown in FIG. Packaging operation becomes possible.

Note that the present invention is not limited to the above-mentioned embodiments, and various modifications can be made within the scope of the gist of the present invention. For example, although the cover is shown as a flat plate, its width and shape may be selected as appropriate, and the cover may be constructed from a plurality of rods. Further, the means for attaching the cover may be selected as appropriate. In addition, the overall configuration of the packaging machine is shown in Figures 1 and 2.
An example is shown in the figure, but it can be modified as appropriate, such as a device that clamps and feeds the film as in Japanese Patent Publication No. 56-35578, or a film folding device as in Japanese Utility Model Publication No. 55-47992 and Japanese Patent Publication No. 56-34484. It is.

[Effect of idea]

The present invention includes a film feeding device that feeds out a roll of stretch film and transports it to a packaging section position;
A packaged article supply device that transfers the packaged article onto a pedestal; a pedestal lifting device that allows the pedestal to move up and down at a position below the packaging section; In the packaging machine, the packaging machine includes a film folding device for folding the film into the package, and a package delivery device; A carry-out belt that folds the end of the film onto the underside of the object to be packaged during the carry-out operation and brings the folded film into close contact with the underside of the object to be packaged, and is disposed between the fed end of the film and the carry-out belt. By providing a cover for the carrying-out belt, it is possible to provide a carrying-out device for a packaging machine that can prevent the film end from coming into close contact with the carrying-out belt during film folding by the cover and can operate smoothly.

[Brief explanation of the drawing]

Figures 1A and B are cross-sectional views showing one embodiment of the present invention in its working state, Figure 2 is a longitudinal cross-sectional view of the entire packaging machine, Figure 3 is a plan view of the same, and Figures 4 A to D are in the packaging state. FIG. 5 is a sectional view showing a conventional example. 2...Packaging department, 3...Packaged item, 3a...Packaged item, 7...Stretch film, 12, 13...
... Folding body, 15 ... Carrying out belt, 15A ... Heater, 21 ... Cover, A ... Packaged object supply device, B ... Pedestal lifting device, C ... Film supply device, D ... Film cutting Device, E... Film folding device, F... Unloading device.

Claims (1)

[Scope of utility model registration request] A film supply device that feeds out a roll of stretch film and transfers it to a packaging section position, a packaged object supply device that transfers the packaged item onto a pedestal, and the pedestal is movable up and down at a position below the packaging section. In the packaging machine, the packaging machine is equipped with a pedestal elevating device, a film folding device that folds the stretch film under the packaged object, and a package delivery device, wherein the delivery device supplies the material to the packaging section position. It is arranged so as to be located above the folded film edge, has a heater, and folds the above-mentioned film edge side to the lower side of the packaged object by the unloading operation, and also brings the folded film tightly to the lower side of the packaged object. A carry-out device for a packaging machine, comprising a carry-out belt and a cover for the carry-out belt disposed between the edge of the supplied film and the carry-out belt.