JPH0323407B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a film sheet packaging device for wrapping objects to be packaged, such as prefabricated refrigerators and building panels, with film sheets.

[Prior Art] Generally, when the above-mentioned manufactured panels are packaged, a method of folding them with cardboard liner paper is adopted. Furthermore, a method of sealing a film sheet by thermocompression bonding, called so-called shrink packaging, is also known.

Furthermore, there is also known an article packaging device that wraps the packaged object with a stretchable film (Japanese Patent Application Laid-Open No. 49-1999).
-Refer to Publication No. 44888). This packaging device welds and cuts both opening ends and both side edges of the film by wrapping the wrapped object with the film against the tension while holding the wrapped object in contact with a belt-shaped film under tension. be.

[Problems to be Solved by the Invention] However, in the packaging method of folding and packaging with cardboard or liner paper, it is necessary to prepare packaging paper of a special size in advance, and the packaging process takes a lot of time. This method has disadvantages in that it requires a lot of time and skill, and also requires a large amount of stock space and is expensive. In addition, the method of sealing film sheets by thermocompression bonding causes wrinkles and has problems in terms of sealing performance, and furthermore, a separate cutting means is required to remove unnecessary edges after sealing. The need arose. Furthermore, in a device for wrapping objects to be packaged with a stretchable film, a sealing device that welds and melts both side edges of the film connects a flat plate on which heating means such as nichrome wire is stretched, and both sides of this flat plate. Since the film is composed of a push plate that is slidably mounted on the film, the welding and fusing parts are thick, and since both edges of the film are held by the transfer tensioning device while the object is wrapped around the film, There was a problem in that the welding and fusing portions were sloped, making it impossible to reliably weld and fusing the film. Moreover, this packaging device has a structure in which a pair of rotating rods having spiral protrusions are rotated in opposite directions to tighten the film on both sides and transfer it.
There was also a fear that the film would be easily wrinkled, making it impossible to reliably weld and cut.

This invention was made with the intention of solving the above-mentioned problem, and it is possible to reliably weld and cut the end and both side edges of the film sheet wrapped around the object without wrinkles. It is an object of the present invention to provide a film sheet packaging device having the following characteristics.

[Means for Solving the Problems] As a means for solving the above-mentioned problems, the film sheet packaging apparatus of the present invention includes a conveyor for conveying the objects to be packaged and the packaging film sheet, and a conveyor that conveys the objects to be packaged and the film sheets for packaging, and a a film sheet supply means for supplying film sheets for upper and lower packaging; a pair of left and right heating means that abut on both sides of the conveyor to seal both edges of the film sheet; and a film sheet for upper and lower packaging in the width direction. The heating means is composed of a conical metal rod which is heated by the heater and has a welded/fused part at the tip having at least a ridgeline downward. Below the heating means, the metal rod is in contact with the metal rod in the tangential direction, and the ridgeline at the tip is located at the bottom of the V.
It is made up of a pivoting support roller with a shaped insertion groove,
The conveyor includes a main conveyor that conveys the objects to be packaged and packaging film sheets, and a pair of upper and lower and left and right film sheets that are positioned on both sides of the heating means and convey the upper and lower packaging film sheets while holding the upper and lower parts of the packaging film sheets. and an outward tension roller located on the pre-processing side of the heating means to pinch the edge of the film sheet and apply an outward tension.

In the present invention, the heating means may be fixed, but it is preferably mounted so that it can be adjusted vertically and/or horizontally.

[Effect] The above technical means works as follows.

Packaging film sheets are supplied from above and below the object to be packaged to be sent to the conveyor, and after the object to be packaged is surrounded by the film sheet, the heating means comes into contact with the edge of the film sheet to melt the film sheet. While doing so, both film sheets are successively fused in a straight line and cut by melting. At this time, the edge of the film sheet to be fused is sent to the heating means with tension applied outward by the outward tension roller of the conveyor, so the unnecessary edge of the film sheet is discharged to the outside by itself. Only the packaged object can be taken out.

[Examples] Examples of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a schematic side view showing the structure of a film sheet packaging device according to the present invention.
0, a pair of left and right heating means 20 that abut to seal both edges of the film sheet 2 at both ends of the conveyor 10; The main parts are composed of a receiving roller 23 which cooperates with the means 20 to control welding and fusing, and an end treatment heater 30 which is movable up and down and which crosses the upper and lower packaging film sheets 2 in the width direction.

As shown in FIGS. 1 and 2, the conveyor 10 includes a main conveyor 12, which is composed of a belt conveyor or the like that conveys the object to be packaged 1 and the packaging film sheet 2, and a main conveyor 12, which conveys the object to be packaged 1 and the packaging film sheet 2.
A conveyor belt 16 for vertically and horizontally symmetrical film sheets 2 which is conveyed while holding the upper and lower parts of both side edges of the film sheet 2, and an outer conveyor belt 16 which is located on the pre-processing side of each of the heating means 20 and which holds the edges of the film sheet 2 and conveys the film sheets 2 A pair of upper and lower outward tension rollers 18 that apply tension to the
It is made up of. In this case, the vertically opposing outer belt conveyors 50 and 60 constituting the film sheet transport belt conveyor 16 include two pulleys 52 and 62, respectively, and a V-belt 54 that is stretched around these pulleys 52 and 62, respectively.
64, and a conveyor belt 1
Inner belt conveyors 56, 66 that constitute 6
The three pulleys 5 are arranged coaxially with the pulleys 52 and 62 at the post-processing side position and the pre-processing side position of the outer belt conveyors 50 and 60 and in front of them.
8 and 68, and V-belts 59 and 69 that are stretched around these pulleys 58 and 68. Therefore, the inner and outer belt conveyors 50, 56, 6
0 and 66, the film sheet 2 is conveyed while sandwiching the upper and lower parts of the side edges of the film sheet 2 while facing each other at the portion spanned between the two outer pulleys 52 and 62 or the inner pulleys 58 and 68. The seal portions on both sides of 2 can be brought into close contact horizontally (see FIG. 4).
The outer periphery of the outward tension roller 18 is made of a flexible material such as rubber, and as shown in FIG. The belt conveyors 50 and 60 are rotated via a transmission belt 70 that is stretched between the pulleys 52 of the outer belt conveyors 50 and 60.

The rotation of the outer belt conveyors 50, 60, the inner belt conveyors 56, 66, and the outward tension roller 18 constituting the conveyor belt 16 is performed by a single motor 80. In this case, as shown in FIG. 7, the drive mechanism includes a drive sprocket 84 attached to a drive shaft 82 of a motor 80, and post-processing pulleys 52, 58, 6 of the conveyor belt 16.
2, 68 and the driven sprockets 86, 88 mounted coaxially with the tension sprocket 8.
The rotation of the motor 80 is transmitted to the upper and lower parts of the conveyor belt 16 in opposite directions.

On the other hand, the heating means 20 has a similar structure to a soldering iron, as shown in FIG. - It is made up of a metal rod 24 with good thermal conductivity such as copper having a fusing part 26, and below this heating means 20, the metal rod 24 is in contact with the tangential direction and the ridgeline of the tip thereof is A receiving roller 23 having a V-shaped insertion groove 21 located at the bottom thereof is supported by a rotating shaft 25 (see FIG. 5). In this case, the V-shaped insertion groove 21 is located between the outer belt conveyor 50, 60 and the inner belt conveyor 56, 66. Therefore, the film sheet 2 is welded between the tip side of the welding/fusion section 26 of the metal rod 24 and the bottom side of the V-shaped insertion groove 21 of the receiving roller 23, and at the same time, the welding/fusion section 26 is welded. Tip and V-shaped insertion groove 21
The film sheet 2 can be reliably cut by fusing with the bottom pointed end of the cutter.

Note that the receiving roller 23 is connected to the V-belts 64 and 69.
It is rotated by the upper side of the . Furthermore, heating means 2
It is also possible to provide a cutter 14 on the post-processing side of the film sheet 2 for reliably removing unnecessary edges of the film sheet 2.

Further, the heating means 20 is attached to a movable frame 40 which is mounted on a fixed frame 41 of the apparatus with vertical screws 43 or the like so as to be movable in the horizontal direction.
4, and is fixed with two U bolts 45 to the upper surface of a support plate 42 which is rotatably mounted in the vertical direction, and is pressed toward an abutment plate 46 that hangs down from the lower surface of the support plate 42. The pressing plunger 48 of the cylinder 47 is in contact with it, and the pressing operation of the pressing cylinder 48 causes the contact plate 46 to rotate clockwise in FIG. 1 or 2, so that the heating means 20 can be moved upward and adjusted. It's becoming like that. Therefore, the heating means 20 can be adjusted vertically and/or horizontally as required, and can be kept raised when not in use.

As shown in FIG. 1, the upper and lower packaging film sheets 2 supplied to the transport conveyor 10 are arranged in upper and lower parts, respectively, with respect to the packaged object supply section 3 on the front-process side of the transport conveyor 10. The film sheet 2 is wound around a film sheet roller 4 and a lower film sheet roller 5, and the film sheet 2 wound around each roller 4, 5 is passed through a guide roller 6 to the supply side of the conveyor 10. being guided. In this case,
Two sets of upper and lower film sheet rollers 4 and 5 are arranged, and when the film sheet 2 of one roller is used up, the other roller is used. .

On the other hand, as shown in FIG. 8, the end treatment heater 30 includes an elevating air cylinder 32 vertically disposed on the front side of the heating means, and an elevating air cylinder 32 that protrudes downward from the air cylinder 32. It is composed of a U-shaped crimp plate 34 attached to the lower end of the plunger 31 and a heater wire 36 such as a nichrome wire stretched over the opening at the lower end of the crimp plate 34. guide plate 38
The crimp plate 3 is slidably disposed along the
A protrusion 33 protruding from the guide plate 38 is guided through a long hole 35 formed in a guide plate 38.
Note that one of the guide rollers 6 constituting the packaged object supply section 3 is attached to the protrusion 33 of the pressure bonding plate 34 so that a tensile force is applied to the upper film sheet 2 as the heater 30 moves up and down. It's summery. A pedestal 37 made of a heat-resistant material is installed below the heater 30.

In the packaging apparatus of the present invention configured as described above, in order to wrap a panel, which is the object to be packaged 1, first, the upper and lower film sheet rollers 4,
After supplying the film sheet 2 wrapped around the film sheet 5 to the lower part of the edge processing heater 30 and melting and crimping the ends of both film sheets 2, the panel 1 is sent to the packaged object supply section 3 and The panel 1 is inserted between the film sheets 2 and transported by a transport conveyor 10. Next, when the transport conveyor 10 is driven to move the packaged object 1 and the film sheet 2, the side edges of the film sheet 2 are pulled outward while being held by the outward tension rollers 18, and are pulled onto the transport conveyor 16. Supplied. Then, the inner and outer belt conveyors 50, 5 are attached to the side edges of the film sheet 2.
6, 60, and 66 while being moved and supplied between the heating means 20 and the receiving roller 23. At this time, the metal rod 24 constituting the heating means 20
Since the ridgeline of the welding/fusion-cutting portion 26 contacts the receiving roller 23 in a tangential direction and is located at the bottom of the V-shaped insertion groove 21, the edge of the film sheet 2 is welded and simultaneously fused and cut. Furthermore, when the panel 1 and the film sheet 2 are conveyed, the unnecessary edges of the cut film sheet 2 are sent to the post-processing side by the feeding belt conveyor 16 and then discharged to the outside. After the panel 1 is conveyed to the rear end in this manner, the film sheet 2 attached to the rear end of the panel 1 is fused and cut by the edge treatment heater 30, and the packaging operation is completed.

In the above embodiment, the film sheet 2 is made of polyethylene (thickness: 60 μm, melting point: 105
~115°C), and the heater 22 of the heating means 20 is 24V, 10A, and further,
Adjust the feed speed of the conveyor 10 to 4.5 to 5.0 m/min.
Good results were obtained when the

[Effects of the Invention] As explained above, since the packaging device of the present invention is configured as described above, the following effects can be obtained.

(1) The film sheets on the front and rear sides of the packaged object are maintained horizontally by edge processing heaters, and both sides are tensioned by outward tension rolls and a pair of top, bottom, and left and right film sheet conveyor belt conveyors. In this state, they are fused in a straight line by the metal rod of the heating means, and the unnecessary edges on both sides are simultaneously fused and cut by the metal rod and the receiving roller, so it is necessary to provide a separate cutting means on the post-process side. It can be shipped to trucks immediately after packaging.

(2) Since the upper and lower film sheets are reliably fused together in a straight line, they can be sealed without wrinkles, and the quality of the packaged object can be maintained during the distribution process.

(3) Since the structure of the device is simple, it is easy to assemble into a production line, and a film sheet packaging device can be realized at low cost.

In addition, in the above example, the case where the object to be packaged is a panel for a building was explained, but it is not necessarily limited to a panel, and it goes without saying that other products can also be packaged in the same way. It is.

[Brief explanation of drawings]

FIG. 1 is a schematic side view of the packaging device of the present invention, FIG. 2 is a side view showing the main parts of the packaging device of the present invention,
Figure 3 is a plan view of Figure 2, Figure 4 is a -
A sectional view, FIG. 5 is an enlarged sectional view of the V section in FIG. 4,
FIG. 6 is a sectional view of the main part of the packaging device of the present invention, FIG. 7 is an explanatory diagram showing the drive mechanism of the conveyor belt conveyor of the invention, and FIG. 8 is a sectional view of the main part of the edge processing heater of the invention. It is a diagram. Code explanation, 2... Packaging film sheet, 10
...Conveyor conveyor, 12...Main conveyor, 18...
... outward tension roller, 20 ... heating means, 2
1...V-shaped insertion groove, 22...Heater, 23...
Receiving roller, 24...Metal rod, 26...Welding/
Fusing part, 30... Heater for end treatment, 32...
Air cylinder for lifting, 36...heater wire,
40...Movable frame, 41...Fixed frame,
43... Vertical screw, 44... Hinge, 46... Contact plate, 47... Pressing air cylinder, 50, 60
...Outer belt conveyor, 56, 66...Inner belt conveyor.

Claims (1)

[Claims] 1. A conveyor 10 that conveys the object to be packaged and the packaging film sheet 2, and this conveyor 10.
a film sheet supplying means for supplying film sheets 2 for upper and lower packaging from upper and lower positions relative to each other; a pair of left and right heating means 20 that abut on both sides of the conveyor to seal both edges of the film sheet 2; and the upper and lower packaging. film sheet 2
The heating means 20 consists of a metal heater 30 for end treatment that is movable up and down in the width direction, and the heating means 20 is heated by the heater 22, and the welded/fused part at the tip has a conical shape with at least a ridgeline downward. The heating means 20 is composed of a rod 24, and below the heating means 20, the metal rod 24 contacts in a tangential direction, and a receiving roller 23 having a V-shaped insertion groove 21 with a ridgeline at its tip located at the bottom is pivotally supported. , the conveyor 10 includes a main conveyor 12 for conveying the objects to be packaged and the packaging film sheet 2, and a heating means 20.
A pair of upper and lower and left and right film sheet conveyor belt conveyors 5 are located on both sides of the film sheet 2 and convey the upper and lower packaging film sheets 2 while holding the upper and lower parts thereof.
0, 56, 60, 66, and an outward tension roller 18 located on the pre-processing side of the heating means 20 and pinching the edge of the film sheet 2 and applying tension outward. A film sheet packaging device characterized by: 2. The film sheet packaging apparatus according to claim 1, wherein the heating means 20 is mounted so as to be adjustable in the vertical and/or horizontal directions.