JPS62135108A - Stretch packaging method - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] <Industrial Applications> The present invention provides a stretch packing method that is effective for packing objects that have sharp corners on the outer periphery when loaded, such as plate glass or thin steel plates. It is related to.

<Prior art and its problems> In recent years, stretch packing methods have begun to spread and are used for various materials.

・Retch packaging refers to non-adhesive films such as polyethylene or adhesive films such as vinyl chloride.
It is wrapped around the item to be packed under a certain tensile force, and compared to the conventional stringing method or carton case method, the material is more stable, the contents can be seen through, and packaging can be completed in a shorter time. It has many advantages.

However, if the item to be packed has sharp corners, such as plate glass, the film used is so thin that it will be cut at the corners and cannot be packed. There was a drawback that a corner member had to be prepared separately.

<Means for Solving the Problems> The present invention aims to solve the above-mentioned drawbacks and provide a method that enables packaging even parts with sharp corners without using any corner parts. The gist is that when packing an object that has a corner on its outer periphery with a ridgeline running vertically using a film to which tensile force is applied, first place the object at a position slightly away from the object along the corner ridgeline. After arranging a rod-shaped body and wrapping a film from the outer periphery of the rod-shaped body, the rod-shaped body is moved to a part other than the corner of the object to be packed, and then the rod-shaped body is handled. This storage method is characterized by the following.

<Operation> The present invention will be described in detail by taking as an example a case where the object to be packaged (1) is a rectangular parallelepiped-shaped object made of a commercial material such as plate glass stacked thereon.

That is, along the ridgeline of the vertical corner (2) of the rectangular parallelepiped-shaped material to be packed (1) as shown in FIG. 1 in a plan view,
As shown in the plan view of Fig. 2, a rod-shaped body (3) (either a rod or a tube can be used) is placed at a position slightly away from the ridgeline, and a film (4) is wrapped over it. .

The rod-shaped body (3) of Otsu has a sharp corner (2) where the film (4)
This is to prevent the film from coming into direct contact with and being cut, so at least the surface that the film (4) comes into contact with, i.e. its outer surface, should be a smooth surface, usually circular. It is preferable to use a material that has as little liquid property as possible between it and the film (4), and to further process the first surface thereof, such as giving it a rough surface such as blanking.

After wrapping the film (4) as shown in Figure 2, the rod-shaped body (3) can be attached to the wrapped object (1) other than the corner, i.e., to the center of the side as shown in Figure 3. Move as quickly as possible.

As the rod-shaped body (3) moves, the film (4) comes into direct contact with the corner of the item to be packaged (1), but in these cases, the film (4) is not likely to be cut. do not have. This is because when the film is directly wound as in the past, tensile force is applied to the film, and the film is cut when it comes into contact with the corner of the packaged object in the shearing direction of the film. However, in the case of the present invention, the film is brought into contact instantaneously in a direction perpendicular to the ridgeline of the corner, so there is no room for shearing force to occur there.

After moving the rod-shaped body (3) to the center as shown in Part B, pull out the rod-shaped body and remove it, leaving it in the state shown in Figure 4, and then if it is necessary to wrap the film again. Wrap it to the required thickness.

In other words, the method of the present invention is a method for preventing the film from being cut at the beginning of winding.Depending on the type of item to be packed, it may be preferable to wrap the film in multiple layers. In such cases, this shall be done after the rod is pulled out.

Although the case where the object to be packed has a rectangular cross section has been described above, the same applies to cases where the cross section is triangular or other rectangular shapes.

In carrying out the present invention, the initial position of the rod-like body (3) is determined using a suitable position sensor. For example, a device is used in which a rod (3) is brought close to a corner (2) of an object (1) to be packaged from the outer circumferential direction, brought into contact with the corner, and then separated by a predetermined distance. Furthermore, in order to make it easier to move the rod-like body (3), methods such as making the rod-like body itself into a roll form to reduce the resistance between it and the film (4) during movement are adopted. There are some things.

<Example> Examples of the present invention will be described below.

As shown in Figure 5, there is a vertically movable film feeding mechanism (6) placed next to a rotatable turntable (5), and a top that is also vertically movable above the turntable (5). An apparatus having four rod-like bodies (3) suspended from a platen (7) was used.

The rod-shaped body (3) suspended from the top platen (7) is configured so that it can move freely within the plane of the gobrate. Using such a device, the object to be packaged (1) made of stacked plate glass is placed on the turntable (5), and the I.
Lower the knob platen (7), place the four rod-like bodies (3) at positions 10 mm outward from the corners of the object to be packaged (1), and place a polyethylene film (30I1m thick)
4) and rotate the turntable (5) to remove about 50% odor from the outer periphery of the rod (3).
Wrapped in a spiral manner. Then the rod (3
) was brought to the center and then pulled upward. The film used in this case was fully wrapped around the item to be packaged without being cut in any way.

<Effects of the Invention> As described above, according to the method of the present invention, even if the object to be packed has sharp corners in stretch packaging using a thin film, the film used can be cut. You can carry out continuous packing as usual without any problems. Therefore, there is an effect that even products such as plate glass materials and thin steel sheets, which are difficult to package, can be easily packaged in 1+P packaging.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing an example of an object to be packaged which is a target object of the method of the present invention, Figs. 2 to 4 are explanatory diagrams of each step of the method of the present invention, and Fig. 5 is an explanation of an embodiment of the present invention. figure. In the figure: (1) Item to be packaged (2) Corner (3) Rod-shaped body (4) Film Patent applicant Ryozo Matsumoto (and one other person) Agent Noriharu Ariyoshi Figure 1 Figure 3 Figure 2 4 prisoners figure 5

Claims (1)

[Claims] 1. When packing an object with a film to which tensile force is applied to an object that has a corner on its outer periphery where the ridgeline runs vertically, first place the object along the corner ridgeline at a position slightly away from the object. After arranging a rod-shaped body in the container and wrapping a film around the outer circumference of the rod-shaped body, moving the rod-shaped body to a part other than the corner of the object to be packaged, and then pulling out the rod-shaped body. A stretch packing method featuring: