JPH0363644A - Protective sheet for transportation and storage of rolled material and method for preventing telescoping - Google Patents

Abstract

PURPOSE:To prevent telescoping and to maintain a normal winding style by providing a specified lancing along the outer peripheral surface at the bottom end of a rolled material to be imposed atop a protective sheet. CONSTITUTION:The lancing 21 is provided annularly on the protective sheet 20 so as to comply with the outer peripheral edge of the rolled material 1 to comply with the outer peripheral edge of the rolled material 1 to be transported. The protective sheet 20 is buckled uniformly by the load of the rolled material 1 in such a manner and, therefore, the telescoping is prevented. The normal winding style is thus maintained and the generation of the pressure fogging during the transportation and storage of a photographic sensitive material, etc., is prevented.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a protective sheet used when transporting or storing roll-shaped objects such as photographic materials such as color paper master rolls, and a method for preventing telescoping phenomenon. Regarding.

(Prior Art) Conventionally, when transporting or storing (hereinafter abbreviated as "transportation") roll-shaped materials such as photographic materials, packaging as shown in FIG. 3 has been used.

That is, 1 is a roll-shaped article to be transported, 2 is a protective sheet, and 3 is a wooden pallet. The outer surface is covered with a wooden frame, boat, etc., as shown in phantom lines.

The materials used to construct the protective sheet 2 include feather core, cardboard sheet, polyethylene foam, polyurethane foam, air cap foam rubber, and vinyl chloride foam. The thickness of the protective sheet 2 varies depending on the material, but in the case of a cardboard sheet, it is approximately 20 mm to 25 cm.
Thicknesses of about m are used.

(Problems to be Solved by the Invention) According to the conventional packaging as described above, a telescope phenomenon may occur at the upper outer edge of the roll-shaped object during transportation, as shown in FIG. This phenomenon occurs when the roll material is heavy (for example, Color Vapor Master Roll manufactured by Konica Corporation; Konica SR Vapor Master Roll has a size of 1500 ml IIX).
3500mm, weight 1350Kg, feather core specification), the protective sheet is compressed and deformed by the weight of the sheet-like object, and a step is created at the periphery of the lower surface of the sheet-like object (No. 4). (see figure).

In particular, when the sheet-like material is a photographic light-sensitive material, there is a risk of pressure fogging occurring in the photographic emulsion layer, so it is impossible to apply more winding tension than necessary, which tends to cause telescoping phenomenon. In this case, an extra external force is applied to that part, resulting in a large amount of damage to the expensive product, such as bending of the edges and generation of pressure fog.

In view of the above, the present invention prevents the occurrence of the telescoping phenomenon even when transporting roll-shaped materials that may be subject to pressure fog, such as photographic materials for which winding tension cannot be increased. The main purpose of this invention is to clarify a protective sheet that can maintain a normal rolled shape and a method for preventing the telescope phenomenon.Other objects and benefits of the present invention are as described below and the attached drawings. This becomes clear from the following.

(Means for Solving the Problems) A feature of the protective sheet of the present invention that solves the above problems is that when a roll-shaped object such as a photographic light-sensitive material is conveyed or stored in a cylindrical shape, the lower part of the roll-shaped object In the protective sheet that is laid down, a notch of a certain depth is provided on the upper surface of the protective sheet along the outer periphery of the lower end of the roll-shaped object to be placed.

Further, the method for preventing the telescoping phenomenon of a roll-shaped object according to the present invention is such that when a roll-shaped object such as a photographic light-sensitive material is conveyed or stored in a cylindrical shape, the telescoping phenomenon is prevented from being placed at the bottom of the roll-shaped object. A protective sheet with a cut of a certain depth along the outer periphery of the lower end of the roll is laid down to prevent buckling inside the cut of the protective sheet from extending to the outside of the cut. It is characterized by preventing the telescoping phenomenon of the upper outer periphery of an object.

[Effect]

Limit point at which the load of a roll-shaped object is applied to the protective sheet 1. In other words, since notches are provided on the top surface of the protective sheet along the outer periphery of the roll-shaped object, the protective sheet buckles uniformly in this area, and the load limit point is not diagonal as in conventional protective sheets. Since the packaging does not deform and create a step, the telecopy phenomenon that occurs in conventional packaging does not occur.

〔Example〕

FIG. 1 is a perspective view of one embodiment of the present invention, in which reference numeral 20 is a protective sheet and 21 is a notch.

As shown in FIG. 2, the cut 21 is provided, for example, in an annular shape along the outer periphery of the roll-shaped object 1 to be transported.

The width and depth of the notch 21 is approximately 2 cm wide and approximately 15III11 when the thickness of the protective sheet 20 is approximately 20 mm.
depth. This dimension varies slightly depending on the type of material forming the protective sheet 20.

In the case of a regular roll-shaped product, the notch 21 may be provided in advance on the protective sheet 20, or the cut 21 may be cut with a cutter or the like after the protective sheet 20 is spread on a pallet and the roll-shaped product 20 is placed. , a notch 21 may be provided.

The size of the protective sheet 20 may be slightly larger than the notch 21, and the overall planar shape is not critical.

The protective sheet shown in Figure 1 (feather thickness 23+*m)
Use core, width of cut 2 am, depth 15ss±2
), using the photosensitive material format manufactured by Konica Corporation, Konica SR
Paper master roll (1500m weight x 3500■
, weight 1: 150 kg) We conducted a comparative experiment with conventional packaging (see Figure 3) using 10 bottles, applying the same load as when transported by sea from Japan to the United States.

As a result, with the conventional packaging method, 8 out of 10 pieces of wood were bent at the edges due to the telescoping phenomenon, whereas with packaging using the protective sheet of the present invention, none of the 10 pieces were bent at the edges. There wasn't.

Issei Kasa Neiichi Using a protective sheet made of the material used in the above experimental example, cut it out along the notch 21 shown in Figure 1 and lay it on the bottom surface of the roll-shaped object 1, and transport it by ship at the same time as the above experimental example. When we conducted a preliminary experiment, we found that the deformation of the protective sheet was not uniform for all 10 pieces.

Edge breakage occurred in 5 out of 10 pieces.

Therefore, according to the protective sheet of the present invention, the notches 21 of a certain depth cause the protective sheet 20 (feather core) to uniformly buckle under the load of the roll-shaped object l, thereby preventing the occurrence of the telescope phenomenon. It turns out that it can be prevented.

(Effects of the Invention) According to the present invention, as a result of uniformly buckling the protective sheet at the portions where the load of the roll-shaped object is applied, it is possible to prevent the telecoup phenomenon that occurs in conventional packaging methods. The above issues will be resolved. In particular, when the object to be transported or stored is a photographic material, pressure fog can be prevented from occurring.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing one embodiment of the present invention, Fig. 2 is a sectional view of the same main part, Fig. 3 is a perspective view showing conventional packaging, and Fig. 4 is a sectional view showing the telecoop phenomenon. . In the figure, each symbol indicates the following. 1: Roll-shaped object 2: Protective sheet 3: Pallet 20: Protective sheet 21: Notch Figure 1 Figure 2

Claims (1)

[Claims] 1. In a protective sheet laid under the roll when a roll of photographic material or the like is conveyed or stored in a cylindrical manner, on the top surface of the protective sheet, A protective sheet for transporting or storing a roll-shaped object, characterized in that a cut is provided at a constant depth along the outer periphery of the lower end of the roll-shaped object to be placed. 2. When transporting or storing a roll-shaped object such as a photographic material in a cylindrical shape, a certain depth is placed at the bottom of the roll-shaped object along the outer periphery of the lower end of the roll-shaped object to be placed. A protective sheet provided with notches is laid down, and buckling inside the notches of the protective sheet is prevented from extending to the outside of the notches, thereby preventing the telescoping phenomenon of the upper outer periphery of the roll-shaped object. Telescoping phenomenon prevention method.