JPS59223669A - Winding core made of paper tube and method of manufacturing the core - Google Patents

Abstract

PURPOSE:To provide a winding core comprising an inner surface layer formed by winding an inner surface material round the outer periphery of a body and a surface layer formed by winding a surface material, which can obtain an outer peripheral surface without a difference in level by forming a longitudinally extended concave portion on one side edge portion of the inner surface material and positioning the side edge portion of the surface material in the concave portion. CONSTITUTION:A winding core includes an inner surface layer 3 formed by spirally winding an inner surface material, an inner surface tape 2 made of fine paper about 0.4mm. in thickness round the outer periphery of a main body layer 1 formed by winding thick paper to be a laminate of about 15mm.. A surface material, a surface tape 4 about 0.1mm. in thickness is spirally wound round the outer periphery of the inner surface layer 3 to form a surface layer 3. At this time, a longitudinally extended concave portion 7 is formed on one side edge portion of the inner surface tape 2. On the other hand, one side edge portion 8 of the surface tape 4 is turned up inward to be doubled, and the doubled edge portion 8 is fitted and adhered to the interior of the concave portion 7 where the other side edge portion is accommodated to fix the surface tape 4.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a winding core made of a thin tube made of thread, synthetic resin, etc., and a method for manufacturing the same.

As for the winding core for winding thread, film, etc.

Various improvements have been made to ensure the quality of kimonos.One of the improvements is to flatten the outer surface of the Rikei. :t
In addition, when wrapping material is wrapped around the outer periphery of the part, wrinkles may not be formed on the member.

In conventional winding cores made of thin tubes, when the surface layer forming the surface layer is rolled up to the outside l1Td of the main body of the paper tube, the longitudinal edges of the opposing radial surfaces are overlapped. As a result of adhering C, a step was created on the outer circumferential surface of the winding core due to the overlapping part. Therefore, fr f of the winding core of the spiral paper tube shown in Fig. 9.
jIl As shown in the enlarged notch diagram, the cardboard etc. is rolled up (
On the outer periphery of the main body layer (41), which is formed by cutting the inner surface tape (421), the inner surface tape (421) is wound in a spiral shape at regular intervals. (4
A surface layer (46
), facing surface tapes 1451 f4
One of the longitudinal edges of 51 (471) is bent to form the concave groove (
44: Position the surface tape (45) inside and bend the other +471' of the longitudinal edge of the surface tape (45). There are many requests for a winding core made of paper tube. Here, in order to make the outer peripheral surface of the member smooth, it is necessary to make the thickness of the inner surface tape (42) and the thickness of the surface tape (45) the same.
.

On the other hand, in today's winding cores, various improvements have been made to prevent wrinkles from forming on the winding surface +rii. , there are those that use A2 quality paper stock. In such cases, it is difficult to make the thickness of the inner layer and the surface of the surface layer the same, and on the other hand, if the thicknesses of both are made the same, the effect of the above-mentioned improvement will not be sufficiently achieved. It had become a problem.

Regarding the surface layer, a material as thin as 0.02 M, such as Cranan paper, may be used for the surface layer. It is necessary to make the inner layer the same thickness as the surface layer when making a cow.(7) However, it is difficult to produce thin paper stock, and care must be taken when handling it, which reduces production time and cost. Therefore, it is desirable to avoid the use of thin paper stock, and the inner layer is required to have a scale that can be changed freely in consideration of cost, handling, etc.

The present invention has been made to meet these demands, and includes a winding core made of paper tube. +71 flat? In order to make it smooth, the surface layer should be bonded smoothly and the inner surface H.
It is an object of the present invention to provide a paper roll made of paper which can freely change its length; and a method for manufacturing the same.

That is, the present invention is made of a four-paper box having at least a main body layer, an inner layer formed by wrapping an inner layer around the outer periphery of the main body layer, and a surface layer formed by turning the outer periphery of the inner layer with a surface layer. 7 rolls,
41gel 1,1' K hey □. □ Benefits 1. A paper tube made of paper having four parts extending continuously in the longitudinal direction, and one or both of the opposing longitudinal edges of the surface and the ribs being located within the recesses. Further, in the present invention, in manufacturing this winding core, four parts are formed continuously in the longitudinal direction on the surface of the inner layer; Fold around the outer periphery of the main body layer, and place one or both of the opposing longitudinal edges of the surface layer within the above four parts. The present invention provides a manufacturing method comprising a step of wrapping the cloth once in the evening.

The present invention will be described in detail with reference to the drawings.

Fig. 1 is a partially cutaway front view of the winding core made of paper metal of the present invention, Fig. 2 (・→ is an enlarged view of the main part thereof,
A) and (B) explain the manufacturing process β).

The winding core is made by winding the cardboard in the usual manner, and the inner layer (21), which is the inner layer made of two-quality paper with a thickness of about 04 Ayu, is attached to the outer periphery of the 15-layer lamination and the outer periphery of the main body layer (1). It consists of an inner layer (3) that is wound spirally, and a surface layer (5) that is formed by winding a surface tape (4), which is a surface layer with a thickness of about 0.1 mm, around the outer periphery of the inner layer (3). . Each layer is bonded by a conventional method as necessary.

The upper corner of one of the opposing longitudinal edges (6) of the internal tape +2]f2] is shaved off with a tarinder or pressed with a press, and the four parts (7) continuously extending in the longitudinal direction are ) is formed. This fourth part (7) is the other longitudinal edge (6) of the inner tape (2).
)' to form a groove on the inner surface layer (3). The depth of this fourth part (7) is twice the thickness of the surface tape (4). One longitudinal edge of the facing surface tape (41f41 (8r) is newly created with a step, and the fourth part ( 7).The other longitudinal edge (8) is folded inward to make it double.This folded edge (8) is glued to the bottom of the inner part (7). Edges glued to the bottom (
8) Glued on top. This allows the inner surface tape (41
The four parts (7) formed on the top are filled with both edges (8) (8γ, and the surface tape is joined thereto, and the edges (8)
1tsr is located within quadrant (7).

Note that the adhesive may be applied to all of the joints of each tape.

As shown in Figure 2 (a) to (→), this winding is manufactured in the following branches and areas. Using a spiral twisting machine for paper tube manufacturing, I'F Wrap with paper, main body layer (1)
) is twisted.

This main body layer (previously the core shaft (1) was added to the core 411I holder (12) of the spiral twisting machine by the usual method) is attached (see Fig. 3).

Next, the inner tape (2) is rolled up on the outer periphery of this main body layer.
four parts (7) extending continuously on one longitudinal edge (6) of the
) is formed by the tarinder (13). When cutting with this grinder (13), a roller (14) is provided at the -yi-1t-Y portion, and the inner tape (2) is made to pass between them (see FIG. 4). This grinder (
13) is movable to the left and right, and the inner surface tape (2
) and the depth of the fourth part (7). Also, to change the width of the gate and section (7), the grounder (1
3) You can replace it with one of another size. Furthermore, instead of the grinder (13), a press may be used to press the tape to form four parts. In addition, Tarainder (I3) is L, if mouth (11) Sat, Zl
That is, if it is located on the dashed line FAi, the roller (I4
) becomes unnecessary. Adhesive is applied to the back side of the inner surface tape (2) using an applicator roller (15). Figure 2 (
As shown in a), the inner tape (2) with four parts (7) formed on the upper part of one longitudinal edge (6) is wrapped around the outer circumference of the main body layer (the moon). A spiral groove is formed on the inner surface layer (3) along with the longitudinal edge (6r) facing the phase j of the inner surface cheep □.

Next, the surface tape +41 is rolled over the inner layer (3) (=I
I get kicked. Opposite surface tape (one longitudinal edge of 41f41 (BF is bent 41r to a cross section -rll size,
Glued to the bottom within the fourth part (7). This longitudinal edge (
8) There is no need to mechanically bend the fold, but it can be rolled up in a conventional manner, and the fold is placed in the portal and glued (see Figure 2). b) Reference 1 [q)
. On this upper surface, facing surface tape 11+
The other edge (8) of 41 is folded inward and bonded in a double layer (see Figure 2 →). This folding is done by passing the edge (8) through a passage in a folding machine (16). It is sufficient to use a conventional folding machine (16). Then, before rolling it up, use the applicator roller (17
1, the adhesive is applied. Due to the peeling, the surface tape (4+) is adhered to the outer periphery of the inner layer, and the paper tube force is completed.By cutting this using a conventional method, it is made into a paper tube winding core. For example, the adhesive applied to the tape may be activated by heat before the tape is rolled up, and the wrapping is done afterward to ensure complete adhesion. Figure 5 shows another embodiment, in which after the main body layer (21) is wrapped, the inner tape (22) is rolled around the outer periphery of the main layer (21). This inner tape (22) is formed with a grinder or a press at approximately the center thereof to a depth approximately equal to the thickness of the surface tape (22). A cloth tape is rolled around the outer periphery of this inner tape (22). One longitudinal edge (25) of the opposing surface tape strips (proboscis) is glued into the groove and folded in a stepped manner. The inside of the other longitudinal edge is not bent, and the inner edge of the other longitudinal edge (251
glued on top. The J warp of the inner tape (on the inside tape) is 05 section, and the thickness of the surface tape (24) is 005. By adding a radius to 31), it is possible to change the cross-sectional shape of the four parts (between the four parts) formed on the inner tape in accordance with the radius of the new song part. As a result, it is possible to eliminate the space (26) that occurs between the bent surface tape (24-) and the four parts (between the four parts). Therefore, in another embodiment of the surface toward the space 载), a similar KA2 [ is riJ function.

At that time, grind one edge, part (6), (13)
In addition to grinding with a grinder, the other edge (6)' may also be chamfered with a grinder (32) (see Figure 8 IF, I).
).

D, it is preferable to use 7977 paper, wrapping paper, and a smooth, high-density paper stock for the surface stripping in the present invention, and the inner layer is made of a paper stock that is at least twice as thick as the surface layer. Just use it.

It is also possible to use a multi-layered structure of paper tape, synthetic resin, metal, or other special tape.

This is done to improve moisture resistance, etc., and various features can be adopted for that purpose. At this time, the width of the special tape placed on the outer surface of the paper tape may be made wider than the width of the paper tape, and only the edges of the special tape may be bent and placed within the recess of the inner tape. good. Alternatively, both of the opposing longitudinal edges of the surface layer may be double-folded inwardly, and both edges may be positioned within the recessed portion of the inner surface layer.

In the embodiment, a spiral paper tube was used as an example, but the same structure can be adopted even if a flat paper tube is used.

As described above, according to the present invention, the thickness and grain quality of the inner surface layer can be determined independently of the thickness and grain quality of the surface layer.

Therefore, it has become possible to freely select and use the surface layer and inner layer having a thickness of 4 g, which are most effective for various purposes of the tube for preventing wrinkles on the surface. It is no longer necessary to use a thin material for the inner layer of paper during paper cutting, and it has become possible to use a relatively thick paper stock that is easy to handle and inexpensive.

Furthermore, the depth and depth of the recesses in the inner layer can be adjusted simply by changing the position of the roller of the grinder or press machine.
It can be easily changed, with one grinder,
By replacing the rollers, four parts of various shapes and sizes can be freely formed on the inner layer. Therefore, in the conventional continuous manufacturing of winding cores, when changing the surface layer to a 17-inch paper, the inner layer was also changed to 71-inch paper at the same time.
However, in the present invention, only one surface layer is changed to a different paper stock, and the inner layer is the same. It was reduced to 1 so that it would be enough to adjust 1 gram for 1 gram, 1 gram, etc. using paper stock.

Furthermore, as in the second embodiment, when the four parts are formed at the center of the inner layer, the shape and size of the four parts, especially the width, are determined only by cutting with a grinder or pressing with a press. Therefore, there is no fear that the width of the four parts will change depending on the skill of rolling the inner layer, and it is possible to more completely position the longitudinal edge of the surface tape within the recess.
Therefore, the present invention provides a winding I& made of thread tube, which can be freely selected and used from paper made to suit various purposes. It is also possible to perform further modifications such as impregnating this winding core with a resin, cutting it with a grinder, and then molding it.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway side view of the paper tube winding core of the present invention, and FIG. 2 11) to → show the first embodiment along with its manufacturing process. Fig. 5d is an enlarged view of the main parts; Fig. 5d is a plan view of a device capable of implementing the process of the present invention; FIGS. 6 and 7 are enlarged views of essential parts showing examples, and FIGS. 6 and 7 are line front views showing the shape of the edges of the grinder or press roller used in carrying out the present invention. FIG. 8 is a diagram showing each longitudinal direction of the inner tape. An explanatory diagram showing processing means for the directional edge,
FIG. 9 is an enlarged sectional view of the main part of the paper tube winding core of the previous application. (Month [211+41...Body layer, +21 [221i
Trouble...Inner tape, +3) +41...Inner layer, +
41 (24+ +451... surface tape, +51 (
4E...Surface layer, +7) +2311431...Four parts, +81 +81' is (: En'+471 +471'
...Longitudinal edge of surface tape.

Claims (1)

[Scope of Claims] 1. A winding core made of a thin tube having at least a main body layer, an inner surface layer formed by winding an inner surface layer around the outer periphery of the main body layer, and a surface layer formed by winding a surface layer around the outer periphery of the inner surface layer. Four parts are formed on the layer that extend continuously in the longitudinal direction thereof, and one or both of the opposing longitudinal edges of the dragon-faced Io are positioned within these gate parts. Winding core made of thin tube. 2. When manufacturing a capillary roll made by wrapping an inner layer around the outer periphery of the main body layer and wrapping an outer moon around the outer periphery, four parts continuously extending in the longitudinal direction are formed on the surface of the inner layer. This inner layer is then wrapped around the outer periphery of the main body layer so that one or both of the opposing longitudinal edges of the surface 44 are located within the L routing portion. A method for manufacturing a thin tube winding core characterized by winding a layer around the outer periphery of an inner layer.