JP3673814B2 - Paper reel and its manufacturing method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a paper reel made of a corrugated cardboard sheet and a method for manufacturing the same.
[0002]
[Prior art]
As a paper reel, one disclosed in Japanese Patent Application Laid-Open No. 2001-2324 is known, and FIGS. 5 to 8 attached to this application show an apparatus described in this publication.
As shown in FIG. 5, a paper cylinder a is provided between a pair of flanges 1 and 2 made of corrugated cardboard to constitute a paper reel. When the paper tube a is unfolded, it becomes a belt shape shown in FIG. 6, and the belt body 3 is made of a single-sided cardboard sheet in which corrugated paper 3b is bonded to one surface of the flat paper 3a.
[0003]
The paper tube a is constructed by adhering both ends of the belt-shaped body 3 as described above. The following procedure is used to bond these both ends. That is, as shown in FIG. 7, the flat paper 3 a and the corrugated paper 3 b are peeled off at the bonding h at one end of the strip 3. The other end of the strip 3 is sandwiched between the peeled flat paper 3a and the corrugated paper 3b, and the flat paper 3a is bonded to each other. Further, the corrugated paper 3b on the one end side peeled off is superposed on the corrugated paper 3b on the other end side, and the two are bonded together.
[0004]
Further, insertion protrusions 4a to 4d and 5a to 5d are formed at equal intervals on both sides in the longitudinal direction of the belt-like body 3. In this embodiment, portions 4f and 5f overlapping the insertion protrusions 4d and 5d on the other end side are formed on one end side of the belt-like body 3. The bonding margin h secured at both ends of the belt-like body 3 is bonded as described above to form the paper tube a shown in FIG. 8, and a plurality of insertion protrusions 4a to 4d are formed at both ends of the paper tube a. 5a-5d protrudes.
[0005]
On the other hand, in the flanges 1 and 2, four arc holes 6a to 6d and 7a to 7d are formed on a virtual circle with which the paper tube a contacts. Note that the arc holes 6a to 6d on the one flange 1 side are not directly illustrated. The arc holes 6a to 6d and 7a to 7d as described above are formed on a virtual circle with which the paper tube a comes into contact, but actually, on the line obtained by equally dividing the virtual circle by 1/8. The arc holes 6a to 6d or 7a to 7d and the non-hole forming portions 8a to 8d or 9a to 9d are alternately provided. Note that the non-hole forming portions 8a to 8d on the one flange 1 side are not shown directly.
[0006]
As a matter of course, the formation intervals of the insertion protrusions 4a to 4d and 5a to 5d are the same as the arc holes 6a to 6d and 7a to 7d. The reason why the lengths of the four arc holes 6a to 6d and 7a to 7d and the four non-hole forming portions 8a to 8d and 9a to 9d are equal to each other is as long as possible. Because. If the length of the arc hole is sufficiently secured and the length of the insertion protrusion is also equal to the arc hole, the insertion protrusion inserted into the arc hole is regulated by the arc hole to draw an accurate arc. It will be. If the insertion protrusion is fixed to the flange while drawing an accurate arc, the roundness of the paper tube a is also maintained.
[0007]
[Problems to be solved by the invention]
The paper cylinder a of the conventional paper reel has a limit in strength because the paper cylinder a is formed by only one cardboard sheet on one side.
Since the strength is limited in this way, the paper tube a may be deformed when winding a continuous body such as a heavy hose or when winding a long continuous body having a large overall weight. .
[0008]
Further, when the continuous body is wound up, if it is caught, a very large force acts on the paper tube a, but if the paper tube a is not strong enough, it may be deformed. It was.
In addition, there are many cases in which a plurality of paper reels wound with a continuous body are stacked and transported. At that time, the weight of each continuous body is increased, so that the lower reel may be deformed. .
[0009]
In any case, when the paper tube a is deformed, various problems occur. For example, when the paper tube a is deformed in a state where the continuous body is wound, the wound continuous body may be broken. Further, if the paper tube a is deformed during the winding process, the continuous body cannot be wound well.
On the other hand, when the paper tube a is deformed as described above, another problem that the paper tube a is easily peeled off from the flanges 1 and 2 occurs. For example, when the paper tube a is deformed, an external force may be concentrated on the deformed portion, and the concentrated external force acts as a strong peeling force on the bonded portion with the flange. When the peeling force acts on the adhesion between the flanges 1 and 2 and the paper tube a locally as described above, the paper tube a is easily peeled off from the flanges 1 and 2. When the flanges 1 and 2 are peeled off from the paper tube a, there is a problem that the wound continuous body comes off from the reel.
[0010]
An object of the present invention is to provide a paper reel in which a paper tube is not easily deformed or peeled off from a flange.
[0011]
[Means for Solving the Problems]
The first invention is a paper reel having a cylindrical portion between cardboard pair of flanges, the tubular portion is made of an outer tube, an inner strip which is provided inside the outer tube, the outer The cylinder is formed by rounding an outer band made of a band-shaped cardboard sheet and connecting both ends, and the inner band is formed of a cardboard sheet having substantially the same width as the outer cylinder and is inserted inside the outer cylinder. inner strip that is in contact with the inside of the outer cylinder spread by its own restoring force, characterized in that to adhere the edge of the outer tube and the inner strip to the flange.
[0012]
Outside the second invention, the outer tube is at one end side, forms a convex portion fitting, in the other end, forming a recess fitting the shape corresponding closely with the protrusions fitting the consists strip, characterized by being constituted by paste it an adhesive sheet to the portion mating was in a cylindrical shape fitted to the concave fitting with the convex portion fitting above.
[0013]
According to a third aspect of the present invention, an outer cylinder is formed of an outer band-shaped body made of a strip-shaped corrugated cardboard sheet, and the outer band is formed by rounding an inner band- shaped body composed of the cardboard sheet and having substantially the same width as the outer corrugated cardboard sheet When the inner cylindrical body spreads by the restoring force of self-confidence and is along the inner side of the outer cylinder, the edges of the outer cylinder and the inner belt body are matched to each other, and the edges of the outer cylinder and the inner belt body are aligned. the after Ke with the glue, characterized in that adhering the edges of the edge and the inner strip of the outer tube to the flange.
However, matching the edges of the outer cylinder and the inner strip does not require exact matching. That is, it is sufficient that the edge of the outer cylinder and the edge of the inner belt-like body are in contact with the flange.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
1 to 4 show an embodiment of the present invention. In this embodiment, flanges are provided on both sides of the cylindrical portion 10 shown in FIG. 1, but the flanges are the same as in the conventional example. Therefore, the cylindrical part 10 is provided between the flanges 1 and 2 as shown in FIG.
[0015]
FIG. 2 shows an outer band 13 made of a single-sided cardboard sheet that forms the outer cylinder 11. A fitting convex portion 14 is formed on one end side of the outer band 13 and a fitting concave portion 15 is formed on the other end side. The fitting convex portion 14 and the fitting concave portion 15 are formed by fitting them together. The shape is exactly the same.
By fitting the fitting convex portion 14 and the concave portion 15 to each other, the outer belt-like body 13 continues in a cylindrical shape, but the outer cylinder 11 is formed by bonding the fitting portion with the adhesive paper 16. .
[0016]
As described above, since the convex portion 14 and the concave portion 15 have a shape that exactly matches, there is no step at the fitting portion when they are fitted. In addition, since only the adhesive paper 16 needs to be attached to the fitting portion, there is almost no step even in the entire outer cylinder 11.
Moreover, if the front end side of the convex part 14 is made into an enlarged shape and the opening part of the recessed part 15 is made into a reduced shape like the embodiment of illustration, it will become difficult to pull out with respect to a pulling direction when they are fitted. .
In addition, it is the same as that of the prior art that the insertion protrusions 4a-4d and 5a-5d are formed at equal intervals on both longitudinal sides of the outer band 13.
[0017]
Moreover, since the outer cylinder 11 can be formed simply by fitting the fitting convex portion 14 and the fitting concave portion 15 and sticking the adhesive paper 16, the outer cylinder 11 can be formed easily. For example, in the conventional case, the flat paper and the corrugated paper at one end of the strip are peeled off, and the other end is sandwiched between the peeled flat paper and the corrugated paper. Bonding work was complicated because they were bonded together. However, this embodiment does not require such a complicated operation.
[0018]
The outer cylinder 11 is formed by the outer band 13 as described above, and the inner band 12 obtained by rounding the band-shaped single-sided cardboard sheet into a cylinder is inserted inside the outer cylinder 11 formed in this way. . The inner strip 12 has a length in the longitudinal direction slightly shorter than the length of the outer strip 13 that forms the outer cylinder 11. The width H2 of the inner strip 12 is substantially equal to the width H1 of the outer cylinder 11. Here, the width H1 of the outer cylinder 11 refers to the distance from the root of the insertion protrusions 4a to 4d to the root of the insertion protrusions 5a to 5d, as shown in FIG.
When the inner strip 12 is inserted into the outer cylinder 11, the corrugated paper of the inner strip 12 is rolled into a cylinder so that the corrugated paper faces inward and the flat paper faces outward.
[0019]
Then, as shown in FIG. 3, the rolled inner band 12 is inserted into the outer cylinder 11. When the inner strip 12 is inserted inside the outer cylinder 11 in this way, the inner strip 12 expands to increase its diameter by its own restoring force. At this time, the inner strip 12 expands with the flat paper side being along the inner side of the outer cylinder 11.
In this way, the inner belt 12 can be brought into close contact with the inside of the outer cylinder 11 simply by rolling the inner belt 12 and inserting it inside the outer cylinder 11. In order to bring the inner strip 12 into contact, it is not necessary to strictly manage the dimensions of the inner strip 12.
[0020]
Further, when the inner band 12 is expanded as described above, the inner side of the inner band 12 can be expanded smoothly because the flat paper side of the inner band 12 is in contact with the inner side of the outer cylinder 11. If the positions of the flat paper and corrugated paper of the inner strip 12 are reversed so that the corrugated paper faces outward, the corrugated paper comes into contact with the inner side of the outer cylinder 11. When the corrugated paper of the inner strip 12 contacts the inside of the outer cylinder 11, the corrugated paper of the inner strip 12 is sandwiched between the corrugated paper of the outer cylinder 11, and the inner strip 12 does not spread well. However, as described above, the inner strip 12 can be smoothly expanded by bringing the paperboard of the inner strip 12 into contact with the inner side of the outer cylinder 11.
[0021]
Moreover, since the width H2 of the inner band 12 and the width H1 of the outer cylinder 11 are substantially the same, the inner band 12 that extends along the inner side of the outer cylinder 11 is as shown in FIG. The edge of the inner strip 12 matches the edge of the outer cylinder 11.
When the edges of the inner strip 12 and the outer cylinder 11 are aligned, the flanges 1 and 2 are fixed to both ends to complete a paper reel. At that time, as shown in FIG. 4, the inner strip 12 The outer cylinder 11 is immersed in the groove 18 of the groove container 17 with the inside attached. At this time, all of the insertion protrusions 4 a to 4 d and 5 a to 5 d of the outer cylinder 11 are immersed in the groove 18, but the other edge portions are touched to the groove 18. When the edge of the outer cylinder 11 is so immersed that it touches the groove 18, the edge of the inner strip 12 that matches the edge also touches the groove 18.
[0022]
Then, the insertion protrusion immersed in the groove 18 is inserted into the arc holes of the flanges 1 and 2 similar to the conventional one, and the edges of the outer cylinder 11 and the inner strip 12 are brought into contact with the flanges 1 and 2. The flanges 1 and 2 can be fixed to both ends of the outer cylinder 11.
In this way, when the flanges 1 and 2 are fixed to the outer cylinder 11, the edges of the inner band 12 are also fixed in contact with the flanges 1 and 2, so that the flanges 1 and 2, the outer cylinder 11 and the inner band 12 are fixed. Is more firmly bonded.
[0023]
Further, when the groove 18 touches the edges of the outer cylinder 11 and the inner band-shaped body 12, the groove 18 penetrates into the contact surface between the outer cylinder 11 and the inner band-shaped body 12 by capillary action. Since the groove 18 penetrates into the contact surface between the outer cylinder 11 and the inner band 12, the outer cylinder 11 and the inner band 12 can be firmly bonded. Therefore, the inner strip 12 is not easily detached from the outer cylinder 11.
[0024]
Further, when the fitting convex portion 14 and the fitting concave portion 15 of the outer cylinder 11 are fitted together, there is no step in the outer cylinder 11. Since there is no step in the outer cylinder 11, that portion is not caught. Furthermore, the fitting state can be firmly maintained by sticking the paper adhesive paper 16 to the fitting portion between the fitting convex portion 14 and the fitting concave portion 15 of the outer cylinder 11.
[0025]
According to the embodiment as described above, the cylindrical portion 10 is formed by the outer cylinder 11 and the inner belt-like body 12 provided on the inner side thereof, so that the strength of the cylindrical portion 10 is higher than that of the conventional one by the amount of the inner belt-like body. Becomes stronger. Moreover, since the inner strip 12 is in close contact with the inside of the outer cylinder 11, the strength of the cylinder portion 10 can be maintained. Therefore, even if a strong external force is applied to the cylindrical portion 10, it will not be deformed. Since the cylinder part 10 does not deform | transform, the continuous body wound up by this cylinder part 10 does not collapse. And since the cylinder part 10 does not deform | transform, a continuous body can be wound up well.
[0026]
Further, since the edges of the outer cylinder 11 and the inner strip 12 abut against the flanges 1 and 2 and are adhered at the abutting portions, the flanges 1 and 2 and the cylinder part 10 are more firmly adhered. Therefore, the cylinder part 10 is not peeled off from the flanges 1 and 2. Since the cylinder part 10 is not peeled off from the flanges 1 and 2, the wound continuous body does not come off from the reel.
[0027]
Further, the inner strip 12 is rolled and inserted into the outer cylinder 11 so that the inner strip 12 is in close contact with the inner side of the outer cylinder 11. Therefore, the dimensional management of the inner strip 12 is strictly controlled. There is no need. Thus, since it is not necessary to strictly control the dimensions, the cost can be reduced accordingly.
[0028]
Furthermore, since the length of the inner strip 12 extending along the inner side of the outer cylinder 11 is shorter than the length of the outer strip 13, the both ends of the inner strip 12 do not overlap. Since they do not overlap, there is no step. Therefore, for example, even when a second inner belt-like body is inserted inside the inner belt-like body 12 and the cylindrical portion 10 is to be reinforced, the second inner belt-like body becomes the first inner belt-like body. It spreads along the body.
[0029]
Furthermore, in the said embodiment, although it is supposed that the length is shorter than the length of the strip | belt-shaped body which forms an outer cylinder as the inner strip | belt-shaped body 12, if it makes it many times longer than the said strip | belt-shaped body, On the contrary, it can be used to maintain strength. For example, the length of the inner band-shaped body is set to be several times the length of the band-shaped body, which is rounded into a spiral shape and inserted into the outer cylinder. Thus, when a long inner strip is rolled up into a spiral shape and inserted into the outer cylinder, the inner strip expands in a number of circles. In this way, if the inner belt-like body is multi-layered, the strength of the cylindrical portion is increased accordingly.
Moreover, the greater the number of turns of the inner band 12, the greater the restoring force on the outside. Therefore, the outer surface of the inner band-shaped body comes into closer contact with the inner side of the outer cylinder.
[0030]
In this embodiment, a single-sided corrugated cardboard sheet is used as the corrugated cardboard sheet forming the outer cylinder or the inner strip, but a double-sided cardboard sheet may be used. By using the double-sided cardboard sheet, a stronger paper reel can be obtained. However, when the cardboard sheet is rolled up into a cylindrical shape, the single-sided cardboard sheet is easier to roll up, and the work for making the cylinder becomes easier.
[0031]
【The invention's effect】
According to the first invention, the cylindrical portion is constituted by an outer cylinder and an inner band-like body provided inside the outer cylinder, and the inner band-like body spreads by its own restoring force , Since the outer cylinder and the edge of the inner belt-like body are adhered to the flange in a state of being in contact with the inner side, the strength of the cylinder portion is increased. Therefore, even if a strong external force is applied to the cylindrical portion, it does not deform.
Further, since the cylindrical portion is not deformed, the cylindrical portion is not easily peeled off from the flange. And since both an outer cylinder and an inner side strip | belt body are adhere | attached with a flange, the adhesive force of a flange and a cylinder part becomes strong, and it becomes much more difficult for a cylinder part to peel from a flange.
[0032]
According to the second invention, the outer cylindrical body constituting the outer cylinder is formed with a fitting convex portion at one end side thereof, and is formed with a fitting concave portion at the other end side, and is fitted with the fitting convex portion. A tube was formed by meshing with the concave portion, and adhesive paper was affixed to this fitting portion. However, the fitting convex portion and the fitting concave portion have a shape that exactly matches, so there is a step in this fitting portion. Can not. In addition, since the adhesive paper is attached to the fitting portion between the fitting convex portion and the fitting concave portion, the fitting state can be maintained.
[0033]
According to the third aspect of the invention, the outer cylinder is formed by the outer belt-shaped body made of the belt-shaped cardboard sheet, and the inner belt-shaped body made of the cardboard sheet and having substantially the same width as the outer cylinder is inserted inside the outer cylinder. The inner belt is brought into contact with the inner side of the outer cylinder, the edges of the outer cylinder and the inner belt are made to coincide, the edge of the outer cylinder and the inner belt is attached to the groove, and the edge of the outer cylinder is attached to the flange. And the edge of the inner belt-like body are adhered to each other, so that the strength of the cylindrical portion can be increased. Therefore, even if a strong external force is applied to the cylindrical portion, it does not deform. Further, since the cylindrical portion is not deformed, the cylindrical portion is not easily peeled off from the flange. And since both an outer cylinder and an inner side strip | belt body are adhere | attached with a flange, the adhesive force of a flange and a cylinder part becomes strong, and it becomes much more difficult for a cylinder part to peel from a flange.
Furthermore, the inner band can be brought into contact with the inner side of the outer cylinder simply by inserting the inner band into the outer cylinder. Moreover, even if the dimensional management of the inner strip is not strict, the outer tube and the inner strip are in contact with each other, so that the cost can be reduced.
[Brief description of the drawings]
FIG. 1 is a perspective view when an inner belt-like body is inserted into an outer cylinder.
FIG. 2 is a development view of an outer cylinder.
FIG. 3 is an assembly view of an outer cylinder and an inner belt-like body.
FIG. 4 is a view showing a state in which a cylindrical portion is immersed in a groove.
FIG. 5 is a conventional general perspective view.
FIG. 6 is a development view of a paper tube.
FIG. 7 is an enlarged view of a state in which end portions of a belt-like body constituting a paper tube are bonded together.
FIG. 8 is a perspective view of a paper tube.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Flange 2 Flange 10 Cylinder part 11 Outer cylinder 12 Inner strip | belt-shaped object 14 Fitting convex part 15 Fitting concave part 16 Adhesive paper 18 Nori

Claims (3)

In paper reel having a cylindrical portion between cardboard pair of flanges, the tubular portion includes an outer tube made of an inner strip which is provided inside the outer tube, the outer tube is a strip-shaped cardboard An outer belt-shaped body made of a sheet is rolled and connected at both ends. The inner belt-shaped body is made of a corrugated cardboard sheet having substantially the same width as the outer cylinder, and the inner belt-shaped body inserted inside the outer cylinder is itself A paper reel in which the edges of the outer cylinder and the inner strip are bonded to the flange in a state where the outer cylinder and the inner band are in contact with each other while spreading due to the restoring force of the outer cylinder . The outer tube is at one end side, forms a convex portion fitting to the other end side and from the outer strip forming a recess fitting the shape corresponding closely with the protrusions fitting above, the paper reel according to claim 1, wherein constituted by paste it an adhesive sheet to the portion mating was in a cylindrical shape fitted to the concave fitting with the convex portion fitting. Forming an outer cylinder with an outer band-shaped body made of a strip-shaped corrugated cardboard sheet , consisting of a corrugated cardboard sheet, and rounding an inner band-shaped body having substantially the same width as the outer corrugated cardboard sheet into a cylindrical shape, and inserting it inside the outer cylinder, said inner cylindrical body, spread by the restoring force of confidence, when along the inside of the outer cylinder, to match the edges of the outer tube and the inner strip, and Ke with the edges of the outer cylinder and the inner strip to the glue The method for manufacturing a paper reel in which the edge of the outer cylinder and the edge of the inner strip are bonded to the flange.

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