JPS6234625B2 - - Google Patents

Description

[Detailed description of the invention]

(Industrial Application Field) The present invention relates to a packing band used in an automatic packing machine. (Prior art) Packaging bands made of thermoplastic synthetic resin have been provided for a long time, but recently, with the development of automatic packaging machines and the systemization and automation of packaging work, it has become possible to pack bands continuously and in large quantities. is becoming more and more common. (Problems to be Solved by the Invention) However, when the conventional packing bands are used in automatic packing machines, there is a problem in that they lack elasticity, causing problems with the packing machines. (Means for Solving the Problems) The present invention aims to provide a packing band for an automatic packing machine that reduces troubles in the packing machine, and is made of a thermoplastic synthetic resin with a grain pattern formed on the whole. is a band-shaped body in which the grain pattern is composed of lattice ribs and vertical ribs, the vertical ribs are formed parallel to the longitudinal direction of the band, and the grain pitch P is 2.5 mm to 2.5 mm.
6 mm, the grain angle θ is 20° to 45°, and the rib volume V ₁ and recess volume V ₂ in the grain pattern are
It is characterized in that the ratio V ₂ /V ₁ is 1 to 3.5. (Function) Forming a grain pattern with vertical ribs strengthens the waist and improves suitability for packaging machines. (Example) Hereinafter, an example of the present invention will be described based on the drawings. A packing band according to the present invention is shown in FIG. 1, and the packing band 1 is particularly suitable for automatic packing machines, and is made of a thermoplastic synthetic resin band, and has uneven textures on both the front and back sides. Pattern 2 is formed. The grain pattern 2 is as shown in FIGS. 2 and 3,
It is composed of lattice ribs 3 and vertical ribs 4.
The lattice ribs 3 are formed of right inclined ribs 3a which are inclined to the right with respect to the longitudinal direction (band longitudinal direction) A of the packing band 1, and left inclined ribs 3b which are inclined to the left. Further, the vertical ribs 4 extend parallel to the band longitudinal direction A, and are formed by one diagonal line of each lattice of the lattice ribs 3, that is, adjacent right inclined ribs 3a, 3a and left inclined ribs 3b, 3b. It is formed along a diagonal line parallel to the longitudinal direction of the band in a rectangular shape. These ribs 3a, 3b, 4... have a trapezoidal cross-sectional shape as shown in Fig. 3, and the design conditions of the grain pattern 2 formed by these are as follows (see Fig. 2). ). Grain pitch P: 2.5 mm to 6 mm Grain angle θ: 20° to 45° Ratio of rib volume V ₁ to recess volume V ₂ : 1≦V ₂ /V ₁ ≦3.5 Here, the grain pitch P is the left and right sides in the band longitudinal direction A. This is the dimension between the intersection points O and O of the inclined ribs 3a and 3b, and the grain angle θ is the inclination angle of the left and right inclined ribs 3a and 3b with respect to the band longitudinal direction A, that is, the vertical rib 4. In addition, the rib volume V ₁ is the total volume of the ribs 3 and 4 in one section within the triangular frame B indicated by the two-dot chain line in Fig. 2 (X and Y in Fig. 3).
On the other hand, the recess volume V ₂ is the volume of the recess 5 in the same section (the volume of the part C in FIG. ), and the ratio V ₂ /V ₁ is determined by the following formula, and the larger this value is, the more securely the ribs 3 and 4 will be raised. In addition, the height of the lattice rib is h ₁ and the height of the vertical rib is h ₂
The cases of h ₁ = h ₂ , h ₁ > h ₂ , and h ₁ < h ₂ are shown separately. (i) When h ₁ = h ₂ (see Figure 3) (ii) When h ₁ > h ₂ (see Figure 4) Push volume/rib volume = A+B/3h ₁ P ² −(A+
B) However, A and B are the following values A=h ₂ {(P-n ₁ /sin θ-m ₂ /tan θ) ² + (P-n ₁ /sin θ-m ₂ /tan θ) (P-l ₁ /
sinθ-l ₂ /tan θ) + (P-l ₁ /sin θ-l ₂ /tan θ) ² } B=(h ₁ - h ₂ ) {(P-m ₁ /sin θ) ² + (P-m ₁ /sin θ) )(P-n ₁ /sin θ)+(P-n ₁ /
sin θ) ² } (iii) When h ₁ < h ₂ (see Figure 5) Push volume/rib volume = A'+B'/3h ₂ P ² -(
A'+B') However, A' and B' are the following values A'=h ₁ {(P-m ₁ /sinθ-n ₂ /tanθ) ² + (P-m ₁ /sinθ-n ₂ /tanθ )(P-l ₁
/sinθ-l ₂ /tanθ) + (P-l ₁ /sinθ-l ₂ /tanθ) ² } B'=(h ₂ -h ₁ ) {(P-m ₂ /tanθ) ² + (P-m ₂ /tanθ)(P- _n2 /tanθ)+(P- _n2
/tanθ) ² } Next, Tables 1 and 2 show the test results regarding the physical properties of the packaging band 1 according to the present invention (product of the present invention) and the conventional packaging band (conventional product). Shown in the table.

【table】

[Table] From the above test results, as shown in Table 2, the product of the present invention is superior to the conventional product in all physical properties, and is especially strong due to its small curvature.
It was found that it has excellent suitability for packing machines. When we actually used it in various automatic packaging machines,
As shown in Table 3, in the case of the conventional product, there were 6 defects in 300 packagings, whereas in the case of the product of the present invention, there were no defects at all, and the defective rate was zero. It was hot.

[Table] (Effects of the Invention) As detailed above, since the present invention has a grained pattern with vertical ribs formed throughout, the band itself is strong and has excellent suitability for packing machines, and is suitable for automatic packing machines. Arch feeding is performed smoothly and well.

[Brief explanation of the drawing]

The drawings illustrate embodiments of the present invention; FIG. 1 is a plan view showing a packing band, FIG. 2 is a plan view showing an enlarged grain pattern of the band, and FIG. FIG. 4 is a cross-sectional view taken along line - in FIG. 2 of another embodiment;
FIG. 5 shows still another embodiment in FIG. 2.
It is a sectional view along a line. 2...Grain pattern, 3...Lattice rib, 4...Vertical rib, P
...Grain pitch, θ...Grain angle.

Claims (1)

[Claims] 1 A band made of thermoplastic synthetic resin on which a grain pattern is formed on the whole, the grain pattern is composed of lattice ribs and vertical ribs, the vertical ribs are formed parallel to the longitudinal direction of the band, and the grain pitch P is 2.5mm~6mm
The grain angle θ is 20° to 45°, and the ratio of the rib volume V ₁ to the recess volume V ₂ in the grain pattern is
A packing band characterized in that V ₂ /V ₁ is 1 to 3.5.