JPS5938354Y2 - Thin plastic carrier bag core plate - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a core plate that adjusts the shape of the bottom of a thin-walled plastic carrier bag.

Generally, thin plastic carrying bags are made by cutting a material tube to an appropriate length, bending both sides 1 and 1' inward to create pleats 2 and 2', and heat-welding one end 3. Then, the opening at the other end 3' is folded inward to form the bottom part 4, and the handle 5 is fixed with screws (in some cases, the handle 5 is directly welded to the opening).

When using the strained and thus obtained handbag main body A, the bottom part 4 is expanded into a box shape as shown in the second figure, and a piece of cardboard of the same shape and size or slightly smaller than the inner bottom surface is laid as a core plate 6. The shape of the bottom part is adjusted, and the core plate 6 swings if it is simply laid down, making it inconvenient to handle, so it is usually fixed by gluing, but this increases the gluing process and increases the cost. Not only was the height high, but there was also a problem that there was no way to fix the core plate if it was misaligned and the glue layer was applied.Recently, a cut of 1.7' has been made in the center of both ends of the core plate 6 as shown in the third figure. A bag has been developed in which both ends of the core plate 6 can be inserted under a triangular part 8 formed when the bottom part 4 of the bag is expanded into a box shape.

However, this method was troublesome because the core plate 6 had to be bent into an arched shape as a whole in order to fix the core plate 6, and if one was not very careful, the core plate 6 could be folded in half during the bending process. There was a risk that the strength of the core plate 6 would be reduced.

Also, regardless of when the difference in length between the end face and the side face of the box-shaped bottom part 4 is large, when this difference becomes small, the inner ends 7a and 7a' of the notches 1 and 7' move closer to the center of the core plate 6, and the width increases. There are various problems in that it becomes easy to fold in two in the direction, and in the case of a square bag in which the end and side surfaces of the bottom part 4 are of the same size, the bag cannot be used as a core plate at all.

This idea was created to solve the above-mentioned problems with the non-glue layer type core plate. It can be easily inserted into the triangular part created when the bottom of the C1 bag is expanded into a box shape. The object of the present invention is to provide a core plate for a new thin-walled plastic carrier bag that can also be applied to a square bag in which the end and side surfaces are of the same size.

Next, this invention will be explained with reference to embodiments shown in the drawings from FIG. 4 onwards.

Note that the same parts are indicated by the same symbols.

As shown in the fourth diagram, the core plate 6 of this invention has opposite sides c, c of a cardboard B that is the same shape and size as the inner bottom surface of the main body A, or is slightly smaller.
It is characterized by providing L-shaped incisions io and io' in '.

In other words, these L-shaped notches 10 and 10' are the triangular parts 8 and 8 formed when the bottom part 4 of the main body A of the handbag is expanded into a box shape.
An insertion piece 11.11' that can be inserted laterally is formed on the lower surface of the hem side 8a, 8a'.

It is desirable for the above-mentioned cross-shaped cuts 10 and 10' to be in opposite directions (in the same direction with respect to the edge of the cardboard) from the viewpoint of fixing work of the core plate 6, stability after fixing, balance, etc.

Furthermore, even if the L-shaped cuts io and io' have the same thickness as the vertical line a and the horizontal line as shown in Figure 5 I, the vertical line a is thicker and the horizontal line is thinner, as shown in ■. It may be something or something else.

Further, the L-shaped cuts 10 and 10' do not always have to be perpendicular to the vertical line a, but may be made obliquely at an acute or obtuse angle.

Furthermore, the L-shaped cut 10.10' is formed in the insertion piece 1.
1.11', the length of the vertical line a can be determined by considering the strength of the insertion piece 11.11'. Opposite side c of B
', c' may be offset from the center.

Incidentally, it goes without saying that the cuts 10 and 10' may be inverted, and in some cases, the cuts 10 and 10' may be inverted, and in some cases, the cuts 10 and 10' may be made in the form of a common vertical line a.
It is also conceivable to form two insertion pieces by placing the character shape and the reverse character shape back to back.

This invention is constructed as described above, and the bottom part 4 of the main body A of the handbag is expanded into a box shape, and triangular parts 8 are formed on both sides of the bottom part 4.
If the insertion pieces 11 and 11' formed by the L-shaped cuts 1υ and 10' made on the opposite sides c and c' of the cardboard B at 8' are pushed laterally into the base sides of the triangular parts 8 and 8', The core plate 6 can be easily fixed as shown in the sixth figure.

Moreover, if this fixing work is done by deforming the flexible bag A,
There is no need to bend the insertion piece 11°11', and the insertion piece 1
Since there is no fold line at 1°11', there is no risk of reducing the strength, and the workability is extremely good and the cost of the bag can be reduced.

In addition, L-shaped notches 1 made on opposite sides c and c' of the cardboard
Since 0.10' can be shifted from the center of the opposing sides as shown in Figure 7, it also reduces the strength of the core plate installed in a bag with a square bottom whose end face and side face are the same size. It has various excellent effects, such as being able to be applied without any problems.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway perspective view of the main body of the handbag in a flat state, Fig. 2 is a partially cutaway perspective view of the main body of the handbag when the bottom is expanded into a box shape, and Fig. 3 is a plan view of the conventional core plate. Figure 4 is a perspective view of the core plate of this invention, Figure 5 is an enlarged view of one end of the core plate, Figure 6 is a plan view showing the fixed state of the core plate, and Figure 1 is the same. FIG. 3 is a plan view of a core plate applied to a bag whose bottom part expands into a square. A... Handbag main body, 8, 8'... Triangular part, 8 a * 8 a'... Bottom side of triangular part, B...・Thick paper, c, c'...
・Opposite sides, 10, 10'... L-shaped notch,
11, 11'... Insertion piece.

Claims (1)

[Scope of utility model registration request] An L-shaped cut is made on the opposite side of a piece of cardboard that is the same shape, same size, or slightly smaller than the inner bottom surface of the handbag main body, and the hem side of the triangular part created by the cut on both sides of the inner bottom surface of the handbag main body. A core plate of a thin plastic carrier bag formed with an insertion piece that can be inserted laterally into a flat surface.