JPH06345119A - Protector for hollow roller end - Google Patents

Abstract

PURPOSE:To protect the end face and the peripheral end of a protector on transferring a roll and prevent the protector from buckling, by forming a ring- shaped groove at the outer periphery of the bottom disk, in the protector in which a cylindrical protrusion is formed at the center of the bottom disk and a side wall is formed at the peripheral edge. CONSTITUTION:A roll 20 is provided with film wound up on the hollow core and packed as a whole on transferring. The packed roll 20 is covered with a protective member 25 like cardboard at the periphery and the endfaces are covered with a protector 10 to which a fixing cap 15 is attached. In the protector 10, a cylindrical protrusion 2 is formed at the center of the bottom disk 1 and a side wall 3 is formed at the peripheral edge respectively. In this case, a ring-shaped groove 7 is formed at the outer periphery of the bottom disk 1. The ring-shaped groove 7 is formed in the range of 3-30mm in width from the side wall and 1-10mm in depth. The ring-shaped groove 7 is formed at 5-90 from the inner peripheral upper end against the upper face of the bottom disk 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an end protector for a hollow roll-shaped body, and more specifically, protects the end face and the peripheral end portion of a roll-shaped body wound with a film, paper or the like when being transported. The present invention relates to an end protector for a hollow roll-shaped body that can prevent deformation.

[0002]

2. Description of the Related Art A roll-shaped body is a film on a hollow core,
A roll of paper or the like is wound, and the whole roll is wrapped with a wrapping material so that the roll is not damaged during transfer. As shown in the exploded perspective view of FIG. Two
The peripheral surface of 0 is covered with a protective material 25 such as a corrugated cardboard, the protective tool 10 is attached to the end surface, and a fixing cap 15 is attached and fixed to the opening of the protective plate projection. . Although the protector 10 is attached to one side in this figure, it is usually attached to both ends. As shown in the perspective view of FIG. 4, this end protector has a disc-shaped bottom portion 1 having a cylindrical protrusion 2 at the center and a side wall 3 at the peripheral edge of the disc-shaped bottom portion 1. .

[0003]

However, when the roll-shaped body to which the end protector having the above-described structure is attached is tilted and supported by the wall as shown in the side view of FIG.
The weight of the roll-shaped body is concentrated on the supporting portion P of the end protector 10 with the floor. As a result, the film,
A roll of paper or the like is displaced toward the support portion P and moves. However, since the end protector 10 does not have a space in which the wound material is displaced, the buckling 30 occurs near the end surface of the wound material as shown in the schematic view of FIG. Due to this buckling, the end face and the peripheral edge of the roll-shaped roll are deformed, and if this cannot be restored, it causes a problem in the quality of the roll-shaped roll product. An object of the present invention is to solve the above problems and to provide an end protector for a hollow roll-shaped body that can prevent buckling of the roll when the roll-shaped body is transferred.

[0004]

Means for Solving the Problems As a result of intensive studies to solve the above-mentioned problems, the present inventor has formed an annular groove in the corner portion between the disk-shaped bottom portion and the side wall of the end protector, and The inventors have found that the object can be achieved and completed the present invention. That is, the end protector for a hollow roll-shaped body of the present invention is a disk-shaped bottom having a cylindrical protrusion at the center and a side end protection for a hollow roll-shaped body having a side wall at the peripheral edge of the disc-shaped bottom. A tool, wherein an annular groove whose outer periphery is a side wall or near the side wall is formed on the disc-shaped bottom portion.

[0005]

When the roll-shaped body having the end protector attached to the end face is laid on a wall and left as it is, the weight of the roll-shaped body is concentrated on the supporting portion of the end protector with the floor. Like Therefore, the roll of film, paper or the like shifts toward the support portion due to its own weight. In the present invention, since the annular groove is formed in the corner portion between the disk-shaped bottom portion and the side wall of the end protector, the offset roll-shaped wound product can be moved into the annular groove.
As a result, the load is dispersed and so-called escape is started. Therefore, a large load is prevented from being applied to one point of the peripheral end portion of the roll-shaped wound material, and buckling of the roll-shaped wound material is significantly suppressed. Further, since the load applied to the roll-shaped wound material can be dispersed as described above, the load applied to the end protector is reduced, and thus the end protector can be thinly formed.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in more detail below with reference to the drawings. FIG. 1 is a perspective view showing an embodiment of an end protector for a hollow roll-shaped body. The same parts as those of the conventional end protector shown in FIG. 4 are designated by the same reference numerals, and detailed description thereof will be omitted. In the figure, the difference from FIG. 4 is that an annular groove 7 whose outer periphery is a side wall 3 is formed in the disc-shaped bottom portion 1.

As shown in the partially enlarged sectional view of FIG. 2, the annular groove 7 has a width x of 3 to 30 mm from the side wall, preferably 9 mm.
To 12 mm, and the depth y is 1 to 1 from the top surface of the disc-shaped bottom.
It is formed to have a thickness of 0 mm, preferably 2 to 4 mm. If the width of the annular groove is less than 3 mm or more than 30 mm, the buckling prevention effect is small, which is not preferable. Also,
If the depth of the annular groove is less than 1 mm, the load is not sufficiently dispersed and the buckling prevention effect is reduced, while if it exceeds 10 mm, the roll-shaped material is displaced, which is not preferable.

Further, the annular groove 7 is 5 to 90 °, preferably 1 from the upper end of the inner peripheral portion with respect to the upper surface of the disc-shaped bottom portion.
It is formed with an angle of 0 to 50 °, particularly preferably 15 to 20 °. If this angle is less than 5 ° or more than 90 °, buckling cannot be avoided, which is not preferable.

As described above, the end protector for a hollow roll-shaped body of the present invention has the annular groove whose outer periphery is the side wall or the vicinity of the side wall in the disc-shaped bottom part. Even if the wound roll-shaped film, paper, or the like is displaced due to its own weight, the rolled substance is displaced into the annular groove. Therefore, it becomes possible to prevent buckling that occurs in the roll-shaped material.
Alternatively, even if buckling occurs, it is possible to limit the buckling to a slight degree of restoration. Further, in the present invention, when the annular groove having the inclined portion extending from the upper portion of the inner peripheral portion to the bottom portion of the outer peripheral portion is formed, the shift movement of the roll-shaped winding material can be easily performed by the load applied to the peripheral end portion of the roll-shaped winding material. This is preferable because the load can be effectively dispersed.

In the present invention, the width, depth and angle of the annular groove 7 can be arbitrarily combined within the above range. Therefore, when the angle of the annular groove is shallow, as shown in FIG. 2A, a groove having an inclined portion extending from the upper portion of the inner peripheral portion to the bottom portion of the outer peripheral portion is formed. When the angle of the annular groove is deep, as shown in FIG. 2B, a groove having an inclined portion that does not extend from the upper portion of the inner peripheral portion to the bottom portion of the outer peripheral portion is formed. Further, when the angle of the annular groove is 90 °, as shown in FIG.
As shown in (c), the cross section is a groove having no inclined portion.

The end protector for the hollow roll-shaped body is manufactured by press-molding or injection-molding one kind or a mixture of two or more kinds of materials such as ABS resin, polypropylene and nylon.

Further, the annular groove is integrally formed at the time of molding the protector, or after the protector is molded,
It is formed by a method such as machining.

The end protector for hollow roll-shaped articles of the present invention comprises:
Open the packaging material that covers the core hollow part of the end surface of the rolled body, which is entirely wrapped, with a cutter, insert the cylindrical protrusion into this opening, and remove the peripheral edge of the roll-shaped body. It is housed in the side wall and attached, and then a fixing cap is attached to the cylindrical protrusion or is fixed by passing a band over the protrusion opening, the hollow core of the roll and the peripheral surface of the roll.

If the end protector of the present invention is attached to both end faces of the roll-shaped body, a roll-shaped product without a grip can be obtained.
Even when using the end face to handle the load, the load applied to the end of the peripheral surface of the wound material is dispersed, and the end or end face deformation due to buckling during transportation is prevented or It will be suppressed. Therefore, damage to the wound material during transportation of the roll-shaped body is prevented, and the yield during use is improved.

Further, according to the end protector of the present invention, the load applied to the wound product of the roll-shaped body can be dispersed, so that even if the end protector is formed thinner than before, it can withstand the load. You can Therefore, the manufacturing cost of the end protector can be reduced.

[0016]

[Experimental example] A cylindrical protrusion having an outer diameter of 7.8 cm and an inner diameter of 6.1 cm is formed at the center of a polypropylene disc-shaped body having a diameter of 38 cm and a thickness of 0.6 cm. An end protector having a structure shown in FIG. 1 in which a side wall having a thickness of 0.6 cm and a height of 3.3 cm was extended to the peripheral edge was produced. An annular groove shown in FIG. 2 is formed at a corner portion between the disk body and the side wall of the end protector. The annular groove has a width of 0.9 cm and a depth of 0.3 cm, and three types of ends are formed on the protrusion side of the annular groove with angles of 18 °, 45 ° and 90 ° with respect to the upper surface of the disc body. A part protector was produced.

A paper core having an outer diameter of 9.2 cmφ and an inner diameter of 7.6 cmφ wound with a stretched polypropylene film and having a weight of 50.
The entire roll of Kg is wrapped with a low-density polyester film of 30 μm, the polyester film covering the hollow part of the core is cut with a cutter to open, and the cylindrical shape of the end protector produced above is opened in this opening. While inserting the protrusion, store the peripheral end of the roll-shaped roll in the side wall,
The above-mentioned three kinds of end protectors were attached to both end faces of the roll-shaped body. Further, a polypropylene band is hung and tied around the opening of the attached end protector, the hollow portion of the roll-shaped paper core and the outer peripheral surface of the roll-shaped roll, and the end-protector is rolled. It was fixed to both sides of the body. For comparison, the end protectors were fixed to both end faces of the roll in the same manner except that the conventional end protector without the annular groove shown in FIG. 5 was used.

As shown in FIG. 6, each roll-shaped body to which the above-mentioned end protector is fixed is placed on a wall at an angle of 60 ° to the floor and left for 2 hours to cause buckling and end protection. When the appearance change of the ingredient was observed, it was as shown in Table 1.

[0019]

[Table 1]

As is clear from Table 1, the occurrence of buckling is greater in the case of using the end protector having the annular groove than in the case of using the end protector having no annular groove. The buckling that occurred was shallow, and the depth of buckling was small, and it was recoverable.

Further, the end protector is rolled in the same manner as above except that the angle of the annular groove formed in the end protector is 90 ° and the width and depth are changed as shown in Table 2. After fixing to both end faces, placing it on the wall in the same manner as above and observing the appearance of buckling and the end protector,
The results are shown in Table 2.

[0022]

[Table 2]

As is apparent from Table 2 above, the width is 10
The one using the end protector having the annular groove having a depth of 20 mm and a depth of 3 to 4 mm is capable of suppressing the occurrence of buckling, and having a shallow depth of buckling, which allows restoration. It was

[0024]

As described above, according to the end protector for a hollow roll-shaped body of the present invention, the occurrence of buckling during transportation of the roll-shaped body is significantly suppressed. Further, even if buckling occurs, the buckling is mild and can be restored. Therefore, it is possible to suppress the occurrence of buckling, prevent deformation and damage of the end surface of the rolled material of the roll-shaped body, and prevent occurrence of quality problems in transporting the roll-shaped body. Also,
Since the load of the roll-shaped body is dispersed, it is possible to withstand the load of the roll-shaped body even if the thickness of the end protector is thinner than in the conventional case, and the production cost can be reduced.

[Brief description of drawings]

FIG. 1 is a perspective view showing a configuration of an end protector according to an embodiment of the present invention.

FIG. 2 is a partially enlarged cross-sectional view showing an example of an annular groove of an end protector, where (a) is a shallow angle θ and (b) is an angle θ.
Is deep and (c) shows the case where the angle θ is 90 °.

FIG. 3 is an exploded perspective view showing a packaging form when a roll-shaped body is transferred.

FIG. 4 is a perspective view showing a configuration of a conventional end protector.

FIG. 5 is a perspective view showing a method of a buckling occurrence evaluation test of a roll-shaped body.

FIG. 6 is a side view showing buckling of a roll-shaped body.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Disc-shaped bottom part 2 Cylindrical protrusion part 3 Side wall 7 Annular groove 10 End protector for hollow roll-shaped body

Claims (3)

[Claims] 1. An end protector for a hollow roll-shaped body having a disk-shaped bottom portion having a cylindrical protrusion at its center and a side wall at the peripheral edge of the disk-shaped bottom portion. An end protector for a hollow roll-shaped body, in which an annular groove whose outer periphery is at or near the side wall is formed. 2. The end protector for a hollow roll-shaped body according to claim 1, wherein the annular groove is formed with a width of 3 to 30 mm and a depth of 1 to 10 mm from the side wall. 3. The hollow roll-shaped body according to claim 1, wherein the annular groove is formed at an angle of 5 to 90 ° from the upper end of the inner peripheral portion with respect to the upper surface of the disc-shaped bottom portion. Edge protection.