KR100694756B1 - Paper core for a paper tube and paper tube assembly having the paper core - Google Patents

Abstract

A paper core for a paper pipe and a paper pipe assembly with the same are provided to mass-produce uniform-sized paper cores by stacking a plurality of disc-shaped papers. A paper core(30) is inserted into and fixed in a circular paper pipe(21) to reinforce the circular paper pipe. The core has an predetermined outer diameter. A plurality of disc-shaped paper plates(31) are stacked. A through-hole(31a) is formed at a central portion of the core. At least one of the stacked paper plates is a corrugated board. Some portions of the outer peripheral surfaces of the stacked paper plates are removed. The adjacent paper plates are fixed and attached by an adhesive. The paper core includes a reinforcing paper pipe inserted into the through-holes of the central portions of the stacked paper plates.

Description

Paper core for paper tube and paper tube assembly provided with the paper core {Paper core for a paper tube and paper tube assembling HAPAING THE PAPER CORE}

1 is a perspective view of a paper tube assembly having a paper core for paper tubes of one embodiment according to the present invention;

Figure 2 is an exploded perspective view of Figure 1

3 is a side view of FIG. 1

Figure 4 is an exploded perspective view of another embodiment of a paper tube assembly having a paper core for a paper sheet of another embodiment according to the present invention

Figure 5 is an exploded perspective view of a branch tube assembly having another branch paper core according to the present invention;

6 is a perspective view of one embodiment of a branch tube assembly with a conventional core;

7 (a) and 7 (b) are side views of another embodiment of a branch tube assembly with a conventional core.

FIG. 8 is a side view illustrating a state in which a film is wound around the branch pipe assembly illustrated in FIG. 6.

<Short description of drawing symbols>

100,200,300 Branch Pipe Assembly 21 Branch Pipe

21a through hole 30 paper core

31 paper board 31a through hole

31b Outer circumference 41 Reinforcement pipe

41a through hole 50 film

The present invention relates to a paper core for a paper tube and a paper tube assembly having the paper core, and more particularly, is inserted into the paper tube for winding a film or paper to prevent the paper tube from being deformed or damaged by an external force. It relates to a paper core and a paper tube assembly having the core for reinforcing.

Referring to FIG. 6, the conventional paper tube assembly 10 for winding a film, paper, or fabric may have a hollow circular paper tube 10, and prevent the paper tube from being damaged when an external force is applied to the wound film or paper. And a core 14 inserted therein. The core 14 is composed of a first reinforcing member 12 and a second reinforcing member 13. The reinforcing members 12 and 13 of the embodiment shown in FIG. 6 are made of wood having a greater strength than the branch pipe, and a reinforcing member made of urethane may be used. The first reinforcing member 12 is plural, and a constant distance in the circumferential direction between the second reinforcing member 13 having the rectangular through hole 13a formed in the longitudinal direction and the inner circumferential surface of the through hole 11a of the branch pipe 11. Is inserted. The reinforcing members 12 and 13 are inserted such that both ends and ends of the branch pipe 11 in the longitudinal direction coincide with each other, and when the external force acts on the film, fabric or paper wound on the outer circumferential surface of the branch pipe 11, Prevent damage.

In the conventional core for the core pipe 14 as described above, the first reinforcing member 12 does not contact the entire inner circumferential surface of the branch pipe 11 to support the branch pipe, but rather contacts the part of the inner circumferential surface of the branch pipe to support the branch pipe. In this case, as shown in FIG. 8, a portion of the branch pipe 11 that is not supported by the first reinforcing member 12 is deformed or damaged by an external force.

In order to solve this problem, as shown in FIG. 7 (a), the core 14, in which the plurality of reinforcing members 15a and 15b are woven from wood, supports the entire inner circumferential surface of the branch pipe 11, but FIG. As shown in (b), the wood 16 and the urethane foam 17 are used so that the core 14 supports the entire inner circumferential surface of the branch pipe 11. However, the core shown in Figure 7 (a) is expensive to use a lot of wood, heavy and inconvenient to handle, the core shown in Figure 7 (b) using a urethane foam (17) to pollute the environment There is a problem.

As described above, the core made of wood has a drawback in that, in addition to the drawback of heavy weight, the bonding force between the surface of the wood and the wood contacting each other is poor. In addition, it is difficult to process the wood used for the core uniformly, there is a fear that the gap is formed between the wood and the inner circumferential surface of the branch pipe to cause deformation of the branch pipe. It is also possible that wood will deform if it absorbs moisture after processing and will not evenly support the inner circumferential surface of the branch pipe. In particular, when the moisture contained in the wood is transferred to the paper pipe through the contact surface between the paper pipe and the wood significantly reduces the strength of the paper pipe, there is a problem causing deformation of the paper pipe. In addition, after using the paper pipe assembly, there is also a hassle to separate the wood or urethane foam inserted into the paper pipe to recycle the paper pipe.

The present invention is to solve the above problems with the conventional core for core pipe. A first object of the present invention is to provide a core for a paper tube that is light, easy to handle, and recyclable. It is a second object of the present invention to provide a branch tube assembly having such a core.

The core for a branch pipe for reinforcing the branch pipe by being inserted into and fixed in the hollow of the circular branch pipe according to the present invention is formed by stacking a plurality of disk-shaped paper plates having an outer diameter of a predetermined size and a through hole formed in the center thereof. Each neighboring paper sheet is adhesively fixed by an adhesive. In order to reduce the weight of the core, it is preferable to use a cardboard sheet of cardboard. In order to further reduce the weight of the core, it is more preferable that a part of the outer circumferential surface of the disc-shaped paper plate is removed at regular intervals. In order to evenly stack the outer circumferential surfaces of the plurality of stacked paper sheets, it is more preferable to insert the reinforcing paper tubes into the through-holes formed in the center of the paper sheet to stack the paper sheets. The reinforcing paper pipe should be a polygonal shape so that the cross section is easy to handle when winding the paper pipe, and the shape of the through hole formed in the paper plate fitted to the reinforcing paper pipe has the same shape as that of the cross section of the reinforcing paper pipe. Use branch pipe.

The paper tube assembly for winding a film, paper, or the like according to the present invention is formed by laminating a circular paper tube and a plurality of disc-shaped paper plates having a through diameter at a central portion having a constant outer diameter, and formed in a hollow of the circular paper tube. It includes an inserted and fixed core. In order to reduce the weight of the branch pipe assembly, at least one sheet of paper of the core is preferably made of cardboard. In order to make the outer peripheral surface of the core and the circular branch pipe more firmly fix the inner circumferential surface, it is preferable that the outer diameter of each paper plate of the core is slightly larger than the inner diameter of the branch pipe so that the core is forcibly fitted to the inner circumferential surface of the branch pipe. In addition, in order to more firmly fix the core and the branch pipe, it is more preferable to apply adhesive to the outer circumferential surface of the core so as to be adhesively fixed to the inner circumferential surface of the round tube.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the present invention.

1 is a perspective view of a paper tube assembly having a paper core for paper tubes of one embodiment according to the present invention, FIG. 2 is an exploded perspective view of FIG. 1, and FIG. 3 is a side view of FIG. 1.

The branch pipe assembly 100 of the present embodiment is composed of a circular branch pipe 21 and a core 30 made of a paper inserted and fixed in the hollow 21a of the branch pipe 21. The branch pipe assembly 100 is used when winding both ends of the polyester base film 50, a metal thin plate, vinyl, etc. on the outer circumferential surface of the branch pipe 21 while rotating by mounting the winding machine.

Referring to Fig. 2, the paper core 30 of this embodiment is formed by stacking a plurality of disk-shaped paper plates 31 having a through hole 31a formed at the center thereof. The paper core 30 is inserted into and fixed in the through-hole 21a of the branch tube 21 to prevent the branch tube 21 from being deformed or damaged by an external force, and also to roll the film around the outer circumferential surface of the branch tube 21. In order to rotate 21, the rotary shaft of the winder is inserted into the through hole 31a. It is preferable that the paper core 30 has the same length as the branch pipe 31. In the present embodiment, the paper plate 31 used double-sided corrugated cardboard to reduce the weight of the paper core 30. When corrugated cardboard is used as the paper sheet 31, it is possible to further improve the strength of the paper core 30 by arranging the valleys of neighboring paper plates so as to cross each other. The paper plate 31 is adhere | attached with the adhesive agent and the side surface of the paper plate 31 which the side surface adjoins. An adhesive was also applied to the outer circumferential surface 31b of the paper plate to be firmly fixed to the inner circumferential surface of the circular paper tube 21. The paper core 30 is inserted and fixed in the hollow of the circular paper tube 21 to prevent the paper tube 21 from being deformed by an external force. The through hole 31a formed at the center of each paper plate 31 has a quadrangular shape, and is formed so as to be easy when the paper tube assembly 100 is installed on a winding machine and wound up. In addition, in order to more firmly secure the insertion of the paper tube 21 and the paper core 30, the core 30 of the present embodiment of the core 30 is more secure than the outer peripheral surface of the core 30 and the paper tube 21 to fix the inner peripheral surface. In order to be firm, the outer diameter of each paper plate 31 of the paper core 30 was slightly larger than the inner diameter of the paper tube so that the paper core 30 was forcibly fitted to the inner circumferential surface of the paper tube 21.

The paper tube assembly 200 of the embodiment shown in FIG. 4 has a paper core 30 different from the paper core 30 shown in FIG. 2. The paper core 30 shown in FIG. 4 further includes a reinforcing paper tube 41 inserted into the through hole 31a, unlike the paper core 30 shown in FIG. The reinforcement paper tube 41 may reinforce the strength of the paper core 30, but when the paper core 30 is manufactured by stacking the through-hole 31a formed in the paper plate 31 by inserting it into the reinforcement paper tube 41. The paper core 30 can be manufactured easily. In addition, when the outer diameter of the paper plate 31 and the position and size of the through hole 31a are uniformly formed, the outer circumferential surface of the core 30 stacked by the reinforcing paper pipe 41 can be evenly formed. In addition, the reinforcement paper tube 41 protects the paper core 30 when the paper tube assembly 200 is installed and rotated in the winder.

2 and 4, the through hole 31a formed in the paper plate 31 may be in the shape of a quadrangle, a polygon such as a hexagon or an octagon, and the reinforcing paper tube 41 is used. It is preferable that the shape of the cross section is the same as the shape of the through hole 31a formed in the paper plate 31.

The paper tube assembly 300 of the embodiment shown in FIG. 5 is a paper tube illustrated in FIG. 4 except that the paper plate 31 of which the disk-shaped outer circumferential surface of the paper core 30 is partially removed is used to reduce the weight. Same as assembly 200.

There are two ways to manufacture the branch tube assembly. One method is to apply an adhesive to the outer circumferential surface of the paper core formed by stacking a plurality of paper plates, and then insert and fix the adhesive into the inside of the paper tube at one time. When manufacturing the branch pipe assembly 200 of the embodiment shown in FIG. 4 by this method, an adhesive is first applied to the outer circumferential surface of the paper core 30. Next, the paper core 30 is pushed into the through-hole 21a of the branch pipe 21. When the diameter of the through hole 21a of the branch pipe 21 is equal to the diameter of the paper core 30, it may be pushed into the through hole 21a with a slight force, and the diameter of the paper core 30 is the branch pipe 21. If the diameter is slightly larger than the diameter of the through hole 21a, the paper core 30 is pushed strongly.

Another method is to insert a sheet of adhesive coated paper sheet one by one into the paper tube and laminated. The paper tube assembly may be manufactured using any method, but in order to fix the paper tube and the paper core more firmly, a paper sheet having a diameter slightly larger than the inner diameter of the paper tube may be inserted one by one. When manufacturing the branch pipe assembly 200 of the embodiment shown in FIG. 4 by this method, the paper plate 31 coated with adhesive on one side and the outer circumferential surface is pushed one by one into the through-hole 21a of the branch pipe 21. Put it in. In this case, large force is not required for the insertion of the paper plate 31. The paper plate 31 to be pushed in later is attached to and fixed to the outer circumferential surface 31b and the inner circumferential surface of the paper plate 31 and the paper tube 21 pushed first by applying an adhesive to the side surface.

According to this invention, the paper core for paper tubes manufactured using paper instead of wood is provided. Paper cores for paper tubes are lighter in weight than wood cores, making them easier to handle and recycling to protect the environment. Moreover, since it is made of the same material as the branch pipe, it is easy to fix and fix the branch pipe. In addition, since a plurality of disk-shaped papers are laminated and manufactured, a paper core of a uniform size can be mass-produced.

According to the present invention, there is also provided a film winding circular paper assembly comprising a paper core. Circular paper tube assembly including a paper core is a paper core formed by stacking the paper core is bonded to the inner circumferential surface of the paper tube and firmly reinforcement, it is possible to use a paper tube having a thinner thickness than when using a wooden core. In addition, since the core made of paper is used, the core can be recycled without using a separate core after the assembly.

Further, according to the present invention, a paper tube assembly is provided in which a paper core is inserted into an inner circumferential surface of the paper tube, thereby preventing the paper tube from being locally deformed by an external force. Therefore, by deforming or breaking the paper tube by an external impact during transportation and use, the film wound on the outer circumferential surface of the paper tube assembly can be prevented from being deformed.

An embodiment of the present invention described above and illustrated in the drawings should not be construed as limiting the technical spirit of the present invention. The protection scope of the present invention is limited only by the matters described in the claims, and those skilled in the art can change and change the technical idea of the present invention in various forms. Therefore, such improvements and modifications will fall within the protection scope of the present invention, as will be apparent to those skilled in the art.

Claims (9)

delete In the core for inserting the inside of the circular branch pipe to reinforce the circular branch pipe, The core is formed by laminating a plurality of disk-shaped paper plates having an outer diameter of a predetermined size and a through hole formed in the center thereof. At least one of the laminated plurality of paper plates is cardboard paper core, characterized in that made of cardboard. The method of claim 2, The laminated plurality of paper plates is a paper core for paper tubes, characterized in that a portion of the outer peripheral surface is removed. The method according to claim 2 or 3, Each of the neighboring paper sheet is a paper core for paper tubes, characterized in that the side is fixed by an adhesive. The method according to claim 2 or 3, The paper core for a paper pipe further comprises a reinforcing paper pipe inserted into a through hole at the center of said plurality of stacked paper sheets. The method of claim 5, The shape of the through-holes formed in the respective paper plates is polygonal, and the cross-sectional shape of the reinforcing paper tube inserted into the through-holes of the plurality of stacked paper sheets is also polygonal. Circular branch tubes, A paper tube assembly comprising the paper core for paper tubes according to any one of claims 2 to 5, which is inserted and fixed in the hollow of the circular paper tube. The method of claim 7, wherein The outer circumferential surface of the laminated paper core inserted into the circular branch pipe is adhesively fixed to the inner circumferential surface of the branch pipe by an adhesive. The method according to claim 7 or 8, The outer diameter of each paper plate of the core is slightly larger than the inner diameter of the circular branch pipe, the paper tube assembly, characterized in that the interference fit to the inner peripheral surface of the branch pipe.

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