JPH0447044Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to an instrument for forming a continuous strip-shaped film into a cylindrical shape while feeding it out.

[Conventional technology]

For example, it has been conventional practice to wrap several containers A called pack containers containing liquid foods such as juice with shrink film and combine them into one package.

In this case, a method is adopted in which a continuous strip-shaped film is sequentially unrolled and passed through a former, and the former is used to form the film into a cylindrical shape and cover the object to be packaged. Both ends of the cylindrical film strip are sealed in the next step, and the front and back of the cylindrical film are also sealed in the width direction.

As a device used in this case, one is known that has a bottom plate extending horizontally from the lower end of the left and right side plates toward the center (for example,
-1115 Publication).

[Problem that the invention attempts to solve]

In this case, the bottom plate is at the same height on both sides, so it can be applied to ordinary heat seal welding of both ends of a cylindrical film, but it is not applicable when welding with electrostatic sealing. Can not. This is because, in the case of welding using electrostatic sealing, both ends of the cylindrical film must at least overlap vertically.

[Means for solving problems]

Therefore, in the present invention, two left and right side plates 1, 1'
The bottom plate 2 is arranged horizontally so that a gap C is formed between the lower end of one side plate 1 and the inner surface of the other side plate 1', and from the lower end of the other side plate 1' to the center. Another bottom plate 2' extends horizontally at a predetermined interval so as to be positioned below the bottom plate 2, and the two bottom plates 2,
Along the inner surface of the side plate 1' facing the side edge of the bottom plate 2 located on the inner side of 2', the packaged object A in the former protrudes from the inner bottom plate 2 and falls within the range of the above-mentioned distance C. A guide bar 3 is provided with a width sufficient to bring the article to be packaged A toward the side plate 1 to the extent that the article A is not intruded into the side plate 1.

[Effect]

This type of former D has a flat top plate 4, and flat side plates 1, 1' are hung from both sides. The entrance side (left side in Fig. 1) of both side plates 1, 1' is formed with an inclined edge 5 downward from the top plate 4, and one strip-shaped film B is pulled forward (right side in Fig. 1) along the entrance end of the top plate 4 and this inclined edge 5 as shown in Fig. 3. Since the width of the film B is wider than the width of the former D, when the packaged item A sent to the entrance of the former D enters under the top plate 4, the film B is molded into a cylindrical shape along the inner surfaces of both side plates 1, 1' and the top plate 4 as shown in Fig. 3. However, as shown in Fig. 4, the ends b, b' of the strip-shaped film B are inserted into the inside of the inner bottom plate 2 and between the inner bottom plate 2 and the outer bottom plate 2' before the film is pulled out, and this state is maintained while the film is pulled in sequence. Thus, the left and right ends of the cylindrically formed belt-like film B are positioned inside and outside the bottom plate 2, sandwiched between the inner and outer bottom plates 2, 2', and overlap when they exit the former D.

On the other hand, the inner width of the former D is wider than that of the packaged object A in order to make it easier for the film B to pass through.
Further, the distance C (FIG. 2) between the side edge of the inner bottom plate 2 and the inner surface of the opposing side plate 1' cannot be made narrower than necessary. If this interval C is narrowed,
This is because the band-shaped film B may break or wrinkle in the vicinity of the circle in FIG. 2. Looking at this from another perspective, it means that the width of the inner side plate 2 cannot be made too wide. In this way, even though the inner width of the former D is wider than the packaged object A, if the width of the inner bottom plate 2 cannot be increased too much, the packaged object A being conveyed will sway laterally within the former D. If the guide bar 3 is not inside the side plate 1' and the guide bar 3 is not on the inside of the side plate 1', it may come off the bottom plate 2 and tilt, or the film B may shift and cause the packaged item A to
Not only will it not be possible to wrap the packaged item normally, but the continuous film will also make it impossible to send the packaged item A forward. However, in the present invention, the side plate 1' facing the inner bottom plate 2 is
Just move the packaged item A in the former toward the side plate 1 along the inner surface of the former to the extent that the packaged item A in the former does not protrude from the inner bottom plate 2 and enter the range of the above-mentioned interval C. guide bar 3 having a width of
is provided, so that the packaged article A in the former D is moved to the left side in FIG. 2 by the guide bar 3, and can be prevented from protruding from the inner bottom plate 2. The guide bar 3 protruding from the inner surface of the side plate 1' reduces the resistance generated between the packaged item A and the side plate 1' when it moves within the former, and the packaged item A passes through the strip film B. Since the side surfaces of the package A are in contact with the guide bar 3, the packaged article A can be moved smoothly within the former. Therefore, even when a plurality of items A to be packaged are packaged together in a band-shaped film, there may be gaps between the front and back of the plurality of items A and A' in the band-shaped film. do not have. In addition, some containers A, which are the objects to be packaged, have a straw or other attachment a attached to them, and the guide bar 3 allows the object A to be wrapped within the former D by the thickness of the attachment a. This prevents it from protruding easily from the inner bottom plate 2 as it approaches the right side in FIG. The guide bar 3 also serves to reduce the resistance generated between the strip film B and the side plate 1' when the film strip B is pulled.

By the way, the reason why the guide bar 3 is provided on the inner surface of the side plate 1' facing the inner bottom plate 2 along the inner surface of the side plate 1' causes no problem with the strip film B in the area circled in FIG. The spacing C near the side edge of the bottom plate 2 does not change at all whether the guide bar 3 is provided or not, and the spacing C is such that the strip film B does not break or wrinkle in the area circled in FIG. 2. Not only that, but also when the strip film B is pulled, the resistance generated between it and the side plate 1' is smaller than when there is no guide bar 3. The part located above the side plate 1' along the side plate 1', and the part located in a relatively narrow area near the side edge of the bottom plate 2 and the side plate 1' (i.e., the area circled in FIG. 2). , there is almost no difference in the amount of tension (traveling distance) and the resistance generated at that time, and the strip-shaped film B connected in a relatively narrow area near the circle in Fig. 2 and in other areas is even and smooth. This is because it will be pulled by Therefore, it is possible to prevent the band-shaped film B from being cut or wrinkled in the vicinity of the circle in FIG. 2.

〔Example〕

Embodiments of the present invention will be described based on the accompanying drawings.

The former D has a flat top plate 4, and flat plate-shaped side plates 1, 1' are hung from both sides thereof.
On the entrance side (left side in FIG. 1) of both side plates 1 and 1', an inclined edge 5 is formed downward from the upper plate 4.
Further, a wing plate 6 is moved diagonally upward from this inclined edge 5.
are attached to each. Due to the presence of both wing plates 6, 6, the band-shaped film B is smoothly drawn into the former D, which has a narrower width.

On the exit side in front of the terminal end of the inclined edge 5, the bottom plate 2 is horizontal from the lower end of one of the left and right side plates 1, 1' toward the center, and the other side plate 1' is Another bottom plate 2' extends horizontally from the lower end toward the center and is positioned below the bottom plate 2 at a predetermined interval. The inner (upper) bottom plate 2 and the outer (lower) bottom plate 2' are the third
As shown in the figure, both of them gradually protrude as they approach the exit side of the former D, and thereafter have a trapezoidal shape with a constant width.

On the inner surface of the side plate 1' facing the side edge of the bottom plate 2 located inside (upper side) of the two bottom plates 2 and 2',
A guide bar 3 is attached along this.

Former D having such a structure has the first
As shown in the figure, one strip-shaped film B is placed on the conveyance path E of the article to be packaged A, and as shown in FIG. 6
It is pulled forward (to the right in Figure 1) along the inside of the former D along with the packaged object A, and is formed into a cylindrical shape along the inner surfaces of the side plates 1, 1' and the upper plate 4. . As shown in Fig. 4, the left and right ends b and b' of the film strip B are
is inserted into the inside of the inner bottom plate 2, and b' is inserted between the inner bottom plate 2 and the outer bottom plate 2', and this state is maintained as they are sequentially pulled. Therefore, the left and right ends of the cylindrical film band B are located on the inside and outside of the bottom plate 2 between the two bottom plates 2 and 2', and overlap each other when exiting the former D. The state seen from the bottom side is shown in FIG. 5, and the two inner and outer films b and b' are overlapped on the bottom side of the packaged object A.

Then, when the strip-shaped film B is further pulled and passed over the electrostatic sealing device F (Fig. 1), as shown in Fig. 5.
The part indicated by “b” is sealed continuously, and the packaged item A
This results in a series of cylindrical packages along the outer periphery of the tube.

In this way, the strip-shaped film B is formed into a cylindrical shape while passing through the former D together with the article to be packaged. It is placed on the left side. Therefore, it is possible to prevent the packaged object A from protruding from the inner bottom plate 2. In particular, when the bottom area of the packaged item A is small, the resistance when pulling the strip film B is small, so the packaged item A tends to move in the left and right direction inside the former D. It can also be prevented. The guide bar 3 also serves to reduce the resistance generated between the strip film B and the side plate 1' when the strip film B is pulled.

[Effect of idea]

According to the present invention, the article A to be packaged is moved to the left side in FIG. The packaged item A can be prevented from coming off from the nearby seams, the packaged item A can be wrapped tightly with the film, and it can be made to look very good. In addition, a series of strip-shaped films B
Not only can the resistance generated between the film B and the side plate 1' be reduced when the former is pulled, but the continuous strip-shaped film B can also be used in a relatively narrow area within the former near the circle in Figure 2 and in other areas. Since the film is pulled out evenly and smoothly, troubles such as the film being cut or wrinkled can be avoided.

[Brief explanation of the drawing]

The attached drawings show an embodiment of the former according to the present invention, and FIG. 1 is a side view showing the former installed on a conveyance path for packaged items, and FIG. 2 is an enlarged view of FIG. 3 is a perspective view showing the state in which the film strip is drawn into this former, and FIG. 4 is an enlarged sectional view showing the state where the film strip is formed into a cylindrical shape by this former together with the packaged object. FIG. 5 is a perspective view showing an object to be packaged wrapped in a series of belt-shaped films formed into a cylindrical shape, upside down. 1, 1'... Side plate, 2, 2'... Bottom plate, 3... Guide bar, A... Item to be packaged, B... Band-shaped film, D... Former.

Claims (1)

[Scope of utility model registration request] Of the two left and right side plates 1 and 1', the bottom plate 2 is placed horizontally so that a gap C is formed between the lower end of one side plate 1 and the inner surface of the other side plate 1' toward the center. Another bottom plate 2' extends horizontally from the lower end of one side plate 1' toward the center at a predetermined interval so as to be located below the bottom plate 2, and the two bottom plates 2, 2' On the inner surface of the side plate 1' facing the side edge of the bottom plate 2 located on the inside,
Along this line, create a width that is sufficient to move the packaged item A toward the side plate 1 to the extent that the packaged item A in the former does not protrude from the inner bottom plate 2 and enter the range of the above-mentioned interval C. 1. A former for forming a strip-shaped film into a cylindrical shape, characterized in that a guide bar 3 is provided.