JP3029814B2 - Rolls for winding paper - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a winding roll for papermaking and the like, and more particularly to a winding roll suitable for manufacturing tissue, toilet paper, polyethylene film and the like.

[0002]

2. Description of the Related Art In the production of paper or various films, the paper or film produced by a take-up roll installed at the final stage of a production machine is wound up, and after the production is completed, the paper or film is rewound and shipped as a product. I do. At the time of this rewinding, remaining paper (broken paper) that cannot be shipped as a product on the take-up roll
A residual film (hereinafter, referred to as “remaining paper”) remains. This residual paper is cut in the axial direction of the take-up roll with a cutter knife and removed from the take-up roll.

[0003]

As shown in FIG. 3, a conventional winding roll has a single rubber layer b around an iron core a.
This single-layer rubber layer is composed of (a) a relatively soft and highly elastic rubber (having a hardness of 80 to 80).
85 °) or (ii) relatively hard rubber (hardness 90-95 °). In the case of (a), the elasticity of the rubber layer b is high, so that the rubber layer b absorbs the tensile force irregularly generated in papermaking, and therefore, there is an advantage that the product is hardly wrinkled and the generation of residual paper is small. When the remaining paper is cut off with a cutter knife, the rubber of the rubber layer b is soft because the rubber of the rubber layer b is soft, so that the cutter knife cuts into the inside of the rubber layer b from the surface of the rubber layer b, causing a deep scratch c on the rubber layer b, Alternatively, a large piece of rubber d is spilled out as shown in FIG.
May be damaged.

In the case of (b), contrary to the case of (a), since the rubber of the rubber layer b is hard, a cut is not easily made by a cutter knife at the time of remaining paper processing, but it is irregular in papermaking. Since the rubber layer b hardly absorbs the tensile force generated in the above, the product is more likely to wrinkle and the generation of residual paper is large. As described above, each of the cases (a) and (b) has advantages and disadvantages.

SUMMARY OF THE INVENTION The present invention has been made in view of the problems of the above-mentioned conventional winding rolls for papermaking and the like, and it is difficult for a cutter knife used for removing remaining paper to be damaged, and a plurality of cuts by the cutter knife are required. An object of the present invention is to provide a winding roll for paper making, in which the rubber on the surface of the roll is hardly spilled even if it enters, and wrinkles of the product and remaining paper (broken paper) are hardly generated.

[0006]

In order to achieve the object of the present invention, a roll for winding paper or the like according to claim 1 is a roll for winding paper or the like having a rubber layer coated around an iron core. The rubber layer is constituted by a surface layer having a predetermined hardness and an inner surface layer disposed inside and having a lower hardness than the surface layer, and the rubber layer is formed in the surface layer or in the surface layer.
Prevents cuts and incisions between the inner layer and the cutter knife
To form an annular or helical member coaxial with the surface layer
It is characterized by being arranged .

According to the first aspect of the present invention, the rubber layer is constituted by the surface layer having a predetermined hardness and the inner surface layer having a lower hardness than the surface layer. In addition to making the cutter knife not easily cut the rubber layer by the cutter knife, the inner layer having relatively high elasticity absorbs the tensile force that occurs irregularly in papermaking, causing wrinkles in the product. It is difficult to reduce the generation of residual paper.

[0008] The papermaking take-up roll according to claim 2 is characterized in that the hardness of the surface layer of the rubber layer is 85 to 98 degrees according to JISA, and the hardness of the inner layer is 50 to 80 degrees according to JISA.

With this configuration, even if the cutter knife cuts into the surface layer, the cut is prevented by the annular or spiral member, and it is possible to prevent the cutter knife from making deep cuts in the rubber layer. ,
Even when a part of the rubber of the surface layer spills down due to the plurality of cuts, it can be kept as a relatively small rubber piece.

[0010]

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 is a perspective view showing one embodiment of a winding roll for papermaking or the like according to the present invention.
FIG. 2 is a sectional view taken along line AA in FIG.

The take-up roll 1 is formed by applying an adhesive around a columnar iron core 2 and vulcanizing and integrating a rubber layer 3. The shafts 4 for rotating the take-up roll 1 by a drive device not provided are fixed.

The rubber layer 3 has a surface layer 3a having a predetermined hardness.
And an inner surface layer 3b having a lower hardness than the surface layer 3a disposed inside.

The rubber used for the rubber layer 3 is preferably a material having high elasticity and high heat resistance.
BR, NBR, CR, EPDM, etc. are preferred. As the surface layer 3a, rubber of a material which is relatively hard and hard to be damaged is selected and used. The preferred range of the hardness of the rubber of the surface layer 3a is 85 to 98 degrees according to JISA, preferably JISA.
90-95 degrees. Here, the hardness of the rubber is measured according to JIS K6301 regarding “Vulcanized rubber physical test method”, and a spring type hardness test JI is used as a measuring device.
It uses the SA type.

When the hardness exceeds 98 degrees, the inner surface layer 3b prevents the tensile force generated irregularly in the papermaking from being absorbed, and the product is easily wrinkled. On the other hand, when the hardness is less than 85 degrees, a cutter knife is used in the remaining paper processing. The cut into the surface layer 3a becomes deep, which is not preferable.

The inner layer 3b is made of rubber having relatively high elasticity, and the preferable range of the hardness of the inner layer 3 is JIS.
A50-80 degrees, preferably JISA60-75 degrees. If the hardness exceeds 80 degrees, the elasticity required to absorb the tensile force that occurs irregularly in papermaking is insufficient, and the product tends to wrinkle, while if the hardness is less than 50 degrees, it is too soft and necessary on the contrary. No resilience is obtained.

At the boundary between the surface layer 3a and the inner layer 3b, a helical member 5 for preventing the occurrence of deep cuts caused by a cutter during the remaining paper processing is provided coaxially with the surface layer in the longitudinal direction of the surface layer. It is arranged to extend. In the illustrated embodiment, the spiral member 5 is arranged so as to wind the inner surface layer 3b, and the spiral member 5 is covered with the surface layer 3a. However, the position of the spiral member 5 is not limited to this. Instead, they may be disposed so as to be embedded in the surface layer 3a. In order to prevent the cutter knife blade from biting into the roll during the remaining paper processing, it is desirable that the position of the spiral member 5 be as close as possible to the outer surface of the surface layer 3a. In the illustrated embodiment, the thickness of the surface layer 3a is set to 3 mm in consideration of the ease of manufacture and the function of the rubber layer 3, so that the spiral shape is difficult. The member 5 is designed to be disposed at a depth of 3 mm from the outer surface of the rubber layer 3. The thickness of the inner surface layer 3b is 7 mm or more.
12 mm, the thickness of the entire rubber layer 3 is 10 mm
It is appropriate to set it to about 15 mm. As the spiral member 5, a wire or a spring steel wire or the like is suitable. As a material of the wire, aramid fiber or hard synthetic fiber can be used in addition to steel or alloy. The spiral pitch of the spiral member 5 is 1 cm.
About 2 to 4 pieces are suitable.

In this embodiment, the helical member 5 is used as a member for preventing the occurrence of cut scratches caused by the cutter knife. However, the present invention is not limited to this. The same function can be achieved by embedding the surface layer 3a in the longitudinal direction of the surface layer 3a coaxially with the surface layer 3a at predetermined regular intervals or by disposing the surface layer 3a between the surface layer 3a and the inner surface layer 3b. The surface layer 3a and the inner layer 3b are integrated by vulcanization adhesion.

Next, the operation of the winding roll will be described. In the final stage of the papermaking process, take-up roll 1
Is used to wind up the paper, and after the production is completed, the paper is shipped as a rewind product. At this time, the remaining paper that cannot be shipped as a product is cut and removed from the winding roll 1 by moving the cutter knife in the axial direction of the winding roll 1.

In this case, since hard rubber is provided as the surface layer 3a of the rubber layer 3, it is difficult to make cuts on the surface layer 3a by the cutter knife, and only a relatively shallow cut 6 remains. Therefore, the function of the winding roll is not hindered. If the cutter knife cuts deeply into the surface layer 3a, the cut of the cutter knife is prevented by the spiral member 5 and is not cut more than the burial depth of the outer end surface of the spiral member 5. No deep cuts are made in the rubber layer 3 by the cutter knife. Further, even when a part of the rubber of the surface layer 3a is spilled down by a plurality of cuts, the rubber can be kept in a relatively small rubber piece 7 as compared with the conventional winding roll, so that the function of the winding roll is substantially reduced. There is no possibility of causing any trouble.

On the other hand, since the tensile force generated irregularly in the papermaking is absorbed by the inner layer 3b having a large elasticity, the product is hardly wrinkled, and the generation of the remaining paper can be minimized.

The winding roll according to the present invention is particularly suitable as a winding roll for producing tissue, toilet paper, polyethylene film and the like. In the case of high-quality paper, newsprint, and medium-quality paper, it is relatively easy to remove the remaining paper, but the winding roll of the present invention can be used for winding these papers.

[0022]

As described above, according to the present invention, the rubber layer is constituted by the surface layer having a predetermined hardness and the inner surface layer having a lower hardness than the surface layer. The hard rubber is hardly cut into the rubber layer by the cutter knife, and the inner layer having relatively high elasticity absorbs the tensile force generated irregularly in the papermaking, so that the product is wrinkled. And the occurrence of residual paper can be reduced.

Further, according to the present invention, the cutter knife is cut into the surface layer by arranging an annular or helical member in the surface layer coaxially with the surface layer to prevent cutting damage by the cutter knife. Even if it cuts, this cut is stopped by an annular or spiral member, and it is possible to prevent a deep cut in the rubber layer with a cutter knife, and multiple cuts spill some of the rubber on the surface layer. Can be kept in a relatively small piece of rubber.

[Brief description of the drawings]

FIG. 1 is a perspective view showing one embodiment of a winding roll for papermaking or the like according to the present invention.

FIG. 2 is a sectional view taken along line AA in FIG.

FIG. 3 is a perspective view showing a conventional winding roll for papermaking or the like.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Winding roll 2 Iron core 3 Rubber layer 3a Surface layer 3b Inner layer 5 Spiral member 6 Cut wound

Continuation of the front page (56) References JP-A-1-214589 (JP, A) JP-A-3-31012 (JP, U) JP-A-59-165861 (JP, U) JP-A-62-155914 (JP) , U) JP-B-48-10494 (JP, B1) JP-B 13-3716 (JP, Y1) (58) Field surveyed (Int. Cl. ⁷ , DB name) B65H 75/00-75/50

Claims (2)

(57) [Claims] 1. A winding roll for papermaking or the like having a rubber layer coated around an iron core, wherein the rubber layer is disposed inside a surface layer having a predetermined hardness and has a lower hardness than the surface layer. Having an inner surface layer having
Cutting with a cutter knife between the surface layer and the inner surface layer
An annular or helical member to prevent scratches on the surface
A roll for winding paper or the like, which is disposed coaxially with the layer . 2. The hardness of the surface layer of the rubber layer is JIS 85
The winding roll for papermaking or the like according to claim 1, wherein the inner surface layer has a hardness of 50 to 80 degrees.