JP2005170513A - Sheet material and winding method of the sheet material and tubular material and forming method of the tubular material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sheet material which can be readily wound on and fixed to an article to be packed. <P>SOLUTION: The sheet material 1 comprises a sheet-like part 2 and a plurality of raised sections 4 provided on the part 2 and the plurality of raised sections 4 compose a raised section line 3, by forming plurality of hollow raised sections 4 in one line, in the longitudinal direction of the part 2 at a predetermined space and the raised section line 3 is provided in two or more lines in the width direction of the part 2. The sheet material 1 is wound spirally on the periphery of the article to be packed 7, facing each raised section 4 outside and the edge parts of adjacent parts 2 are piled to each other and the raise sections 4 of the raised section line 3 on the lower side located in the piled section are engaged in the recess parts 5 of the raised section lines 3 on the upper side to each other to fix the sheet material 1, in a wound state on the periphery of the article to be packed 7. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a sheet-like material, a method for forming a sheet-like material, a tubular material, and a method for forming a tubular material, and in particular, various uses such as cushioning materials, transporting equipment such as packing materials, interior materials for vehicles and buildings, and the like. In particular, the present invention relates to a sheet-shaped material, a method for forming the sheet-shaped material, a tubular material, and a method for forming the tubular material.

  As an example of a sheet-like material formed from a synthetic resin or the like, a sheet-like material in which an outer sheet is provided on both surfaces of an intermediate sheet having a plurality of hollow convex portions to form a honeycomb structure is known (for example, (See Patent Document 1 and Patent Document 2.)

  As another example of a sheet-like material, a thin plate having a plurality of hollow convex portions and a thin plate having a plurality of hollow convex portions are closely attached so that the tips of the hollow convex portions are in contact with each other. There is known a sheet-like material in which an intermediate sheet is formed and an outer sheet is provided on one or both surfaces of the intermediate sheet to form a honeycomb structure (see, for example, Patent Document 3).

Since the sheet-like material having such a configuration has excellent characteristics such as shock-absorbing property, sound-absorbing property, heat-insulating property, etc., such as transportation materials such as shock-absorbing materials and packing materials, interior materials for vehicles and buildings, etc. Thus, it can be widely used for various applications.
Japanese Utility Model Publication No. 7-37629 JP-A-10-156985 JP 2000-326430 A

  By the way, in the sheet-like material having the above-described configuration, there is no particular problem when used in the form of a sheet. It must be fixed to the state by a fixing means such as a band or a tape, which takes time and effort. In addition, when a sheet-like material is curved and formed into a tubular shape, the ends must be joined together by a joining means such as an adhesive or heat fusion and fixed to the tubular shape. In fact, it takes time and effort.

  The present invention has been made in view of the above-described conventional problems, and even when used by wrapping around the peripheral surface of the enveloping body, it is not necessary to use a fixing means or the like and it is easily wound. Of a sheet-like material and a sheet-like material that can be easily fixed in a tubular state without the need for using a joining means even when used in a tubular shape. An object of the present invention is to provide a winding method, a tubular product, and a method for forming a tubular product.

In order to solve the above problems, the present invention employs the following means.
That is, the present invention has a sheet shape, a plurality of hollow convex portions that protrude from one surface are provided in a row at predetermined intervals, and at least two convex portion rows are provided. A concave portion that opens to the other surface is provided on the inner surface side of the portion, and each convex portion is configured to be fitted to each concave portion.

  According to the sheet-like material according to the present invention, the sheet-like material is curved into a desired shape, the end portions of the sheet-like material are polymerized, and the convex portion and the upper portion of the lower convex row located in the polymerized portion The sheet-like object can be held in a desired shape by fitting the concave portions of the convex portion row with each other.

  In the sheet-like object, the outer surface of each convex portion is formed in a tapered surface whose diameter gradually increases from the tip to the root, and the inner surface of each concave portion gradually increases in diameter from the tip to the root, It is formed in the taper surface of the same angle as the taper surface of each convex part.

  According to the sheet-like material according to the present invention, the sheet-like material is curved into a desired shape, the end portions of the sheet-like material are polymerized, and the convex portion and the upper portion of the lower convex row located in the polymerized portion The sheet-like object can be held in a desired shape by fitting the concave portions of the convex portion row with each other. In this case, the outer surface of each convex portion is formed into a tapered surface, and the inner surface of each concave portion is formed into a tapered surface having the same angle as the tapered surface of the outer surface of each convex portion. Can be easily and reliably fitted.

  Each of the convex portions is formed in a cone shape or a truncated cone shape in which the diameter gradually increases from the tip to the base, and each of the concave portions gradually increases in diameter from the tip to the root. It is characterized by being formed in a conical or frustoconical space that can be fitted to each convex part.

  According to the sheet-like material according to the present invention, the sheet-like material is curved into a desired shape, the end portions of the sheet-like material are polymerized, and the convex portion and the upper portion of the lower convex row located in the polymerized portion The sheet-like object can be held in a desired shape by fitting the concave portions of the convex portion row with each other. In this case, each convex portion is formed in a conical shape or a truncated cone shape, and the inner surface of each concave portion is formed in a conical or truncated cone shaped space that can be fitted to each convex portion. A convex part and each recessed part can be fitted easily and reliably.

  In the sheet-like object, each of the convex portions has a truncated cone portion formed with a tapered surface whose diameter decreases toward the distal end side, and protrudes from the truncated cone portion toward the distal end side, and the tapered portion of the truncated cone portion. And a projecting portion configured to include a tapered surface whose diameter decreases toward the tip side at an angle different from the surface, and each of the concave portions has a shape of the convex portion so as to be fitted to the convex portion. It may be formed in a corresponding shape.

  Here, as the protruding portion, for example, a truncated cone shape including a tapered surface having an angle different from the tapered surface of the truncated cone portion, or a protrusion protruding vertically from the truncated cone toward the tip side, that is, in a cylindrical shape. A tapered surface having an angle different from the tapered surface of the truncated cone portion may be formed on the tip side of the cylinder.

  According to such a configuration, the convex portion is formed with a tapered surface having at least two kinds of angles, and the concave portion is formed in a shape corresponding to the shape of the convex portion so as to be fitted to the convex portion. For example, when the seal-like material is rolled up to form a tubular shape by fitting the convex portion and the concave portion, the contact area between the convex portion and the concave portion is increased and the frictional force between the convex portion and the concave portion is increased. Therefore, the sheet-like material can be maintained in a tubular state.

  In the sheet-like material, a groove extending from the tip of the convex portion to the root is formed in each convex portion, and each concave portion is formed in the convex portion so as to be fitted to the convex portion. A protrusion that fits into the groove may be formed. In this case, a plurality of the groove portions may be formed on the respective convex portions, and these groove portions may be formed at positions that are symmetrical to each other when the respective convex portions are viewed from the tip side. The groove may have a substantially triangular shape or a substantially quadrangular cross-sectional shape when cut along a plane substantially perpendicular to the protruding direction of each convex portion.

  According to such a configuration, since the groove portion is formed in the convex portion and the protruding portion corresponding to the groove portion of the convex portion is formed in the concave portion, for example, the seal-like material is rounded to form the convex portion and the concave portion. Is formed into a tubular shape by fitting the groove portion and the protruding portion, the contact area between the convex portion and the concave portion increases, and the frictional force between the convex portion and the concave portion increases. Thus, the sheet-like material can be maintained in a tubular state.

  In the present invention, the sheet-like material is used, and the sheet-like material is wound around the peripheral surface of the enveloping body in a spiral or parallel manner with each convex portion facing outward, and the edges or ends adjacent to each other in the longitudinal direction. The portions are overlapped with each other, and the respective convex portions of the lower convex portion row and the concave portions of the upper convex portion row located in the overlapping portion are fitted to each other, and the sheet-like material is placed on the peripheral surface of the enveloping body. It is fixed.

  According to the winding method of the sheet-like material according to the present invention, the sheet-like material is wound spirally or in parallel on the peripheral surface of the enveloping body with each convex portion facing outward, and the adjacent edges in the longitudinal direction are connected to each other. By superimposing each other and fitting each convex part row of the lower convex part row and each concave part of the upper convex part row to each other, the sheet-like material is fixed around the surrounding surface of the envelope. be able to.

  Here, in the present invention (Claim 8 or below), “overlapping / fitting of edges adjacent in the longitudinal direction” means “one row when the number of rows of convex portions of the sheet-like material is (n)”. As described above, it means that bonding is performed at (n-1) columns or less. For example, when the convex part of a sheet-like object is 5 rows, 1 to 4 rows can be superposed and fitted.

  In the present invention (Claim 8 or below), it is preferable that the “winding amount (number)” in which the sheet-like materials wound spirally or in parallel overlap is in the range of 1 to 5 windings. When it is wound in a range of 1 turn or less, the fit is weak and the ends are easily peeled off. In addition, a highly rigid tubular product can be obtained by winding a plurality of times, but a high external pressure is required at the time of fitting for winding more than 6 times, and the circumference diameter of the innermost layer and the outermost layer As a result of the difference in the diameter of the circumference, the positions of the convex portions to be superposed do not match, making fitting difficult.

  The present invention is a tubular product made of the sheet-like material, wherein the sheet-like material is curved in a spiral or parallel manner with each convex portion facing outward, and edges adjacent in the longitudinal direction are overlapped with each other The convex portions of the lower convex row and the concave portions of the upper convex row located in the overlapping portion are fitted to each other.

  According to the tubular product of the present invention, the sheet-like material is curved in a spiral or parallel manner with each convex portion facing outward, and the adjacent edges in the longitudinal direction are superposed on each other, and positioned in the superposed portion. A tubular object can be formed by fitting each convex part of the lower convex part row and each concave part of the upper convex part row to each other.

  The present invention uses the sheet-like material, the sheet-like material is curved in a spiral or parallel manner with each convex portion facing outward, and the adjacent edges in the longitudinal direction are polymerized with each other to form a polymerized portion. The convex portions in the lower convex row and the concave portions in the upper convex row that are located in the upper portion are fitted to each other, thereby forming a tubular shape.

  According to the method for forming a tubular article according to the present invention, the sheet-like article is curved in a spiral or parallel manner with each convex portion facing outward, and the adjacent edges in the longitudinal direction are polymerized to each other, and polymerization is performed. A tubular object can be formed by fitting each convex part of the lower convex part row | line | column located in a part with each recessed part of an upper convex part row | line | column.

  As described above, according to the sheet-like material, the method for winding the sheet-like material, and the tubular material and the method for forming the tubular material according to the present invention, the sheet-like material is encapsulated with each convex portion facing outward. A spiral row or a parallel winding around the circumferential surface of each of the adjacent edges or ends are overlapped with each other, and each convex part row of the convex part row located in the lower part of the superposition part and the convex part row located in the upper part By fitting the respective recesses with each other, it is possible to fix the sheet-like material around the peripheral surface of the envelope. Accordingly, when the sheet-like object is wound around the enveloping body, a fixing means for fixing the sheet-like object to the enveloping body is not necessary, so that the winding operation of the sheet-like object around the encapsulating body is easy. Therefore, it can be effectively used for various applications in which a sheet is wound.

  Further, when forming a tubular material from a sheet material, the sheet material is curved spirally or in parallel, the adjacent edges in the longitudinal direction are polymerized with each other, and a convex portion located below the polymerization portion By fitting each convex part of a row | line | column and each recessed part of the convex part row | line | column located in a high rank mutually, a sheet-like thing can be fixed to a tubular shape and a tubular tubular thing can be formed. Therefore, when forming a tubular material from a sheet-like material, it is not necessary to join the end portions of the sheet-like material by a joining means such as an adhesive, so that the formation of the tubular material is facilitated, and the sheet-like material is formed into a tubular shape. It can be effectively used for various applications formed and used.

  In addition, after winding the sheet-like material, the edges adjacent to each other in the longitudinal direction or the ends may be fitted together, and may be bonded using an auxiliary agent, or mechanical fixing means may be assisted. May be used together for bundling.

Hereinafter, embodiments of the present invention shown in the drawings will be described.
1 to 4 show an embodiment of a sheet-like material and a method for winding the sheet-like material according to the present invention. FIG. 1 is a perspective view showing one surface (front surface) side of the sheet-like material. 2 is a perspective view showing the other surface (back surface) side of the sheet-like material, FIG. 3 is a perspective view showing a state in the middle of winding the sheet-like material around the enveloping body, and FIG. FIG.

  That is, as shown in FIGS. 1 and 2, the sheet-like material 1 is made of a sheet-like material made of a synthetic resin, and a predetermined shape is obtained by using a known molding machine (roll molding machine or the like) using this material. The sheet-shaped main body 2 and a plurality of convex portions 4 regularly provided on one surface of the main body 2 are provided.

  The material of the sheet-like material 1 is not particularly limited, and various thermoplastic resins can be used, but polypropylene is preferable in consideration of the balance with cost, moldability, physical properties, and other characteristics. When transparency is important, polycarbonate is preferable.

  In order to increase the rigidity of the sheet-like material 1, a filler may be added as a secondary material. The auxiliary material is not particularly limited, but talc, calcium carbonate, and the like are preferable in consideration of the balance with cost, formability, handleability, and the like. Increasing the amount of filler added leads to higher costs and increased specific gravity, so considering these balances, the amount added is about 5% by weight for talc and about 20% by weight for calcium carbonate relative to the total weight. The following is preferable.

  The plurality of convex portions 4 form a hollow shape regularly provided on one surface (surface) of the main body portion 2, and in this embodiment, a predetermined length along the longitudinal direction of the main body portion 2 is determined. The convex portions 4 are provided in a row for each interval to constitute the convex portion row 3, and such convex portion rows 3 are provided in a plurality of rows at predetermined intervals in the width direction of the main body portion 2.

  Each convex portion 4 has a hollow shape having a concave portion 5 that opens on the other surface (back surface) of the main body portion 2 on the inner surface side, and the outer peripheral surface has a tapered surface whose diameter gradually increases from the tip to the root. It is formed in a conical shape. Each convex part 4 is formed in the same shape and size.

  Each recess 5 is formed in a conical space with a tapered surface whose inner surface gradually increases in diameter from the tip (deepest part) to the root (opening end). Each recess 5 is formed in the same shape and size.

  The taper angle of the outer peripheral surface of each convex portion 4 and the taper angle of the inner peripheral surface of each concave portion 5 are formed to be the same. Thereby, when the sheet-like material 1 is curved and the edges are overlapped, the overlapping portion The convex part 4 of the convex part row | line | column 3 located in the low order of this and the recessed part 5 of the convex part row | line | column 3 located in the high order can mutually be fitted, and it can fix to the fitted state. .

  The taper angle of each convex portion 4 and the taper angle of each concave portion 5 are in the range of 46 to 80 °, and preferably in the range of 60 to 72 °. When the taper angle is less than 60 °, when the sheet-like object 1 is fixed in a state of being wrapped around the enveloping body 7 or when the sheet-like object 1 is fixed in a tubular state, the protrusions fitted to each other It is because 4 and the recessed part 5 become easy to detach | leave. Further, if the taper angle is 73 ° or more, in the above case, the number of the convex portion row 3 on the outer periphery (upper) and the convex portion 4 (recess portion 5) of the inner peripheral (lower) convex portion row 3 do not match. This is because it becomes difficult to fit all the convex portions 4 and the concave portions 5 of the both convex portion rows 3 and 3 located in the overlapping portion.

  The diameter of each convex part 4 is 4 to 10 mm, the pitch between the convex parts 4 and 4 of each convex part row 3 is 1 to 10 mm, and the pitch between adjacent convex part rows 3 and 3 is 7 mm or more. When the pitch between the adjacent convex portion rows 3 and 3 is 6 mm or less, in the above case, the convex portion row 3 of the outer peripheral (upper) convex portion row 3 and the convex portion 4 (recessed portion) of the inner peripheral (lower) convex portion row 3 are formed. This is because the numbers do not match and it is difficult to fit all the convex portions 4 and the concave portions 5 of the two convex portion rows 3 and 3 located in the overlapping portion to each other.

  As for the thickness of the main-body part 2, 0.1-1 mm is preferable. When the thickness of the main body portion 2 is less than 0.1 mm, when the plurality of convex portions 4 are formed by molding with a molding machine, each convex portion 4 is in an extremely thin film state, and thus is located in the overlapping portion. This is because when the convex portions 4 of the lower convex portion row 3 and the concave portions 5 of the upper convex portion row 3 are fitted to each other, sufficient fitting strength, rigidity and the like cannot be obtained.

  And in order to implement the winding method of the sheet-like material by this invention using the sheet-like material 1 comprised as mentioned above, as shown in FIG. As shown in FIG. 4, the edge portions in the width direction of the main body portion 2 of the sheet-like object 1 adjacent to the longitudinal direction of the enveloping body 7 are overlapped with each other, as shown in FIG. The convex portions 4 of the lower convex portion row 3 and the concave portions 5 of the upper convex portion row 3 are fitted to each other. In this way, the sheet-like object 1 can be fixed to the surrounding surface of the enveloping body 7 in a state where it is wound a predetermined number of times.

  In the sheet-like material and the method for winding the sheet-like material according to this embodiment configured as described above, when the sheet-like material 1 is used by being wrapped around the peripheral surface of the envelope 7, the sheet-like material 1 is used. Is not required to be fixed to the peripheral surface of the enveloping body 7 by a fixing means such as a band or a tape, so that the winding work of the sheet-like material 1 around the encapsulating body 7 becomes easy. Therefore, the sheet-like object 1 can be effectively used for various uses in which the sheet-like object 1 is wound around the peripheral surface of the envelope 7.

  FIG. 5 shows an embodiment of a tubular object and a method for forming a tubular object according to the present invention. That is, this tubular object 6 is formed using the sheet-like object 1 shown in FIG. 1 and FIG. 2, and the sheet-like object 1 is curved in a spiral shape so that each convex part 4 faces outward ( 3), the edges in the width direction of the main body 2 adjacent to each other in the longitudinal direction are superposed on each other, and each of the convex portions 4 of the lower convex row 3 and the upper convex row 3 located in the superposed portion. The recess 5 is formed into a tubular shape by fitting with each other.

  In the tubular product according to this embodiment configured as described above and the method for forming the tubular product, when the sheet-like product 1 is used to form a tubular shape, an adhesive is provided between the ends of the sheet-like product 1. Since it is not necessary to join by joining means, such as heat sealing | fusion, the formation of the tubular article 6 becomes easy. Therefore, it can be effectively used for various uses in which the sheet-like material 1 is formed in a tubular shape.

  In the above-described embodiment, an example in which one sheet-like object 1 is formed into a tubular object 6 or wound around the enveloping body 7 is shown. However, a plurality of sheet-like objects 1 are fitted and connected. Thus, an arbitrary diameter or length can be produced, so that it is possible to form a large-diameter or long tubular object 6 just by preparing one or a few kinds of sheet-like materials. Or it can wind around the elongate package 7. In this case, the plurality of sheet-like objects 1 may be ones in which other sheet-like objects are previously fitted and fixed to the end in the longitudinal direction or the edge in the width direction. Another sheet-like material can be fitted and fixed in order to the end of the sheet-like material that has been wound around the body 7.

  In the above-described embodiment, the sheet-like material is spirally wound around the peripheral surface of the enveloping body with each convex portion facing outward, and the edges adjacent in the longitudinal direction are polymerized with each other. The sheet-like material is wound in parallel around the enveloping body without shifting the row of pins (so-called “coil winding”), and the end portions adjacent to each other in the longitudinal direction are overlapped with each other to form a lower protrusion located in the overlapping portion. It is also possible to fix the sheet-like object to the peripheral surface of the enveloping body by fitting each convex portion of the partial row and each concave portion of the upper convex portion row.

== Production equipment ==
FIG. 6 shows the overall configuration of an apparatus for producing a sheet-like material according to the present invention. In the figure, a T die 102 is provided at each end of the extruder 101, and a sheet-like material 103 extruded from the T die 102 is formed with a convex portion by a convex portion forming device 104. Then, the product is sequentially cut by a cutting machine (not shown) to complete the product.

  As shown in FIGS. 7 to 9, the molding apparatus 104 includes a decompression chamber 110, an embossing roller 111 that is supported by bearings in the decompression chamber 110, and whose peripheral surface faces the opening 110 a side that opens in the decompression chamber 110. The sheet introduction part plate 112 disposed inside the opening part 110a and inclined toward the tangential direction on the peripheral surface of the embossing roller 111, and a plurality of ear parts rotatably supported on both inner sides of the decompression chamber 110 A pair of ear roller receivers that are arranged opposite to the roller 115 and the ear roller 115 with a slight gap and are arranged on both sides of the embossing roller 111 to semi-seal both sides of the embossing roller 115 in the decompression chamber 110. The quasi-sealing member 114 and a rear plate 116 that is horizontally disposed toward the tangential direction on the back surface of the embossing roller 112 and continues toward the rear opening 110b of the decompression chamber 110 are provided.

  A decompression suction port 110c is opened in the decompression chamber 110. This decompression suction port 110c is connected to a vacuum pump (not shown) through a hose (not shown), and the vacuum chamber 110 is suctioned under reduced pressure, whereby the surface on the embossing roller 111 side is in a reduced pressure state. The surface of the embossing roller 111 is sucked and stuck to the surface.

  As shown in FIG. 10, the embossing roller 111 has a large number of pins 111b projecting regularly and vertically on the surface of a steel or aluminum die cast roller 111a. The shaft 111c of the roller 111a is on the outer surface of the decompression chamber 110, and is connected by a gear or a timing pulley to rotate in the transfer direction of the sheet 103. It is rotated by a motor that does not. This motor rotates the embossing roller 11 at a speed synchronized with the take-up speed of the take-up machine 107.

  Further, the embossing roller 111 has a diameter of, for example, about 2 mm in a trough portion (a flat portion other than the pin 111b) of the roller 111a in order to prevent air from being trapped between the sheet-like material 103 and the embossing roller 11. 1-5 mm is preferable) (not shown). This hole is in open communication with the decompression chamber 10. As a result, there is no difference in the degree of decompression between the decompression chamber 110 and the embossing roller 111, and the sheet-like material 103 can be sucked evenly onto the embossing roller 111. Therefore, the embossing roller 111 can be made hollow inside. In addition, a hole can provide the pin 111b in the ratio of one for every 1.5-2 pieces, for example, can also be provided in all the troughs formed with the pin 111b, or 1 about several troughs. It can also be provided at a rate of one.

  The introduction part plate 112 has a function of minimizing the gap between the opening part 110a and the sheet-like material 103 introduced here, and maintaining the decompression inside the decompression chamber 110.

  The ear roller receiving and semi-sealing member 114 maintains the state where the sheet material 103 is pressed against the embossing roller 111 by rotating the both sides of the sheet material 103 in the width direction between the ear roller 115. It has a function to send it later.

  In the above, the sheet-like material 103 in a semi-molten state extruded from the T-die 102 comes into contact with the embossing roller 111 while being sucked under reduced pressure in the forming device 104, and is adsorbed to the embossed roller 111. Accordingly, a large number of hollow convex portions 106a are formed. Thereafter, the resin sheet is removed from the pin 111b, guided to the rear plate 116, and further cooled, and led out from the rear opening 110b of the decompression chamber.

  The degree of vacuum in the vacuum chamber 110 is 300 to 1000 mmH2O, preferably 400 to 600 mmH2O, and vacuum molding can be easily performed.

  Further, the gap between the plates 112 and 116 and the embossing roller 111 should be as small as possible in order to maintain a reduced pressure, and may be set to 1 mm or less, preferably about 0.2 mm. However, this numerical value is set for the purpose of preventing the plates 112 and 116 from contacting the embossing roller 111 and securing the degree of decompression as much as possible, so the gap can be further reduced according to the machine accuracy.

In addition, this invention is not limited to the said embodiment. The present invention includes, for example, a case where the convex portions of the sheet-like material are formed as follows.
FIG. 11 is an enlarged view of a plurality of convex portions of the sheet-like material according to the first modification of the present invention, (A) is a plan view thereof, and (B) is a side view thereof. As shown in FIG. 11, two grooves 210 are formed in the convex portion 200 on the tapered surface of the convex portion 4 (FIG. 1). As shown in FIG. 11A, these groove portions 210 are arranged at positions symmetrical to each other when the convex portion 200 is viewed from the front end side, and are cut along a plane substantially perpendicular to the protruding direction of the convex portion 200. In this case, the cross section is substantially triangular. As shown in FIG. 11B, each groove portion 210 is formed so as to extend from the tip to the root. Moreover, the recessed part formed in the inner surface side of the convex part 200 of a sheet-like material is formed in the shape corresponding to the shape of the convex part 200. FIG. That is, a protrusion 220 corresponding to the groove 210 of the protrusion 200 is provided in the recess, and the protrusion 200 and the recess are fitted by fitting the protrusion 220 into the groove 210.

  By forming such a groove portion 210, when the convex portion 200 and the concave portion are fitted, the groove portion 210 and the protruding portion 220 are fitted to increase the contact area. The frictional force between the recesses increases. For this reason, the convex part 200 and the said recessed part become difficult to remove | deviate, and when the sheet-like thing is formed in the tubular shape, the shape can be maintained.

  Moreover, FIG. 12 has expanded and shown the some convex part of the sheet-like material which concerns on the 2nd modification of this invention, (A) is the top view, (B) is the side view. is there. As shown in FIG. 12, the convex portion 300 is formed such that two groove portions 210 are further added to the tapered surface of the convex portion 200 according to the first modified example, and a total of four groove portions 210 are formed. Yes. As shown in FIG. 12A, these groove portions 210 are formed at positions symmetrical to each other when the convex portion 300 is viewed from the front end side. As shown in FIG. 12B, each groove portion 210 is formed so as to extend from the tip to the root. Further, the concave portion of the sheet-like material is formed in a shape corresponding to the shape of the convex portion 300 and can be fitted to the convex portion 300. According to such a convex part 300, since the contact area of the convex part 300 and the said recessed part further increases, the convex part 300 and the said recessed part can be fixed reliably.

  Moreover, FIG. 13 has expanded and shown the some convex part of the sheet-like material which concerns on the 3rd modification of this invention, (A) is the top view, (B) is the side view. is there. As shown in FIG. 13, the convex portion 400 is different from the convex portion 300 according to the second modified example in that each cross-sectional shape of the four groove portions is different. That is, in the convex portion 400, four groove portions 410 are formed at positions that are symmetrical when the convex portion 400 is viewed from the front end side, and the cross section of each groove portion 410 is a quadrangular shape. As shown in FIG. 13B, each groove 410 is formed to extend from the tip to the root. Further, the concave portion of the sheet-like material is formed in a shape corresponding to the shape of the convex portion 400 and can be fitted to the convex portion 400. Also in such a convex part 400, since the contact area of the convex part 400 and the said recessed part increases further, the convex part 400 and the said recessed part can be fixed reliably.

  Moreover, FIG. 14 has expanded and shown several convex part of the sheet-like material which concerns on the 4th modification of this invention, (A) is the top view, (B) is the side view. is there. As shown in FIG. 14, the convex portion 500 includes a truncated cone portion 510 having a tapered surface whose diameter decreases toward the tip side (upward in FIG. 14B), and an upper surface 511 of the truncated cone portion 510. And a projecting portion 520 projecting from the distal end side. The protruding portion 520 includes a cylindrical portion 521 having a diameter smaller than that of the upper surface 511 of the truncated cone portion 510, and a truncated cone having a tapered surface whose diameter decreases from the cylindrical portion 521 toward the distal end side. And a tip 522 having a shape. The taper angle of the truncated cone part 510 is different from the taper angle of the tip part. Further, the concave portion of the sheet-like material is formed in a shape corresponding to the shape of the convex portion 500. That is, a two-step tapered surface is formed in the concave portion as well as the convex portion 500, and the tapered surface of each step is equal to the taper angle of each tapered surface of the convex portion 500. Thereby, the recessed part and the convex part 500 can be fitted.

  As described above, since the taper angle of the truncated cone part 510 and the taper angle included in the protruding part 520 are formed at different angles, the contact area increases when the convex part 500 and the concave part are fitted. The frictional force between the convex part 500 and the concave part can be increased. For this reason, the convex part 500 and the said recessed part become difficult to remove | deviate, and when the sheet-like thing is formed in the tubular shape, the shape can be maintained.

  FIG. 15 is an enlarged view of a plurality of convex portions of a sheet-like material according to the fifth modification of the present invention, (A) is a plan view thereof, and (B) is a side view thereof. is there. As shown in FIG. 14, the convex portion 600 includes a truncated cone portion 610 having a tapered surface whose diameter decreases toward the tip side (upward in FIG. 16B), and an upper end of the truncated cone portion 610. In addition to projecting toward the distal end side, a truncated cone-shaped projection 620 formed at an angle different from the taper angle of the truncated cone 610 is provided. Further, the concave portion of the sheet-like material is formed in a shape corresponding to the shape of the convex portion 600 and can be fitted to the convex portion 600. Thus, since the taper angle of the frustum part 610 and the taper angle of the protrusion part 620 are made different, when the convex part 600 and the concave part are fitted, the contact area increases, and the convex part 600 And the frictional force between the concave portion and the concave portion can be increased. For this reason, the convex part 600 and the said recessed part become difficult to remove | deviate, and when the sheet-like object is formed in the tubular shape, the shape can be maintained.

The raw materials used in this example are as follows.
・ Thermoplastic resin; (EA9, homopolypropylene made by Nippon Polychem)
・ Filler: MAX2070T (Takehara Chemical Industries, Talc Masterbatch, Talc content 70wt%)
-Dry blended at a ratio of 95 wt% thermoplastic resin and 5 wt% filler, and used as the main raw material.
・ Structure of cylindrical projections (convex parts): taper angle 72 °, lower bottom diameter 6 mm, spacing 2 mm, projection pitch 8 mm, height 6 mm
・ Structure structure: 500g / m2 per unit area, 0.5mm thickness, 117mm width (17 rows), 1000mm length
The molten resin sheet is vacuum-adsorbed on the peripheral surface of the embossing roller that is rotatably arranged in the vacuum chamber, and the embossing roller is rotated, so that it is regularly arranged on the resin sheet according to the pin shape protruding from the embossing roller. A structural plate having a large number of cylindrical protrusions was obtained.

== Example 1 ==
A cylindrical structure having an inner diameter of about 154 mm was obtained by winding it in a circumferential shape.

== Example 2 ==
By fitting both ends (1st row and 17th row) and winding them in a spiral shape, a cylindrical structure with an inner circumference of about 73 mm in diameter and a short length of about 400 mm was obtained. .

== Example 3 ==
A cylindrical structure with an inner diameter of about 73 mm and a short length of about 840 mm, which is self-supported by fitting a structural plate of the same size in Example 2 in the range of about 40 mm and winding it in the same manner Got.

  The sheet-like material, the sheet-like material winding method, the tubular material, and the method for forming the tubular material of the present invention can be expected to be used for various applications as described below.

== Sheet ==
Overlays such as pallets, underlays, seats in car trunks, gap sheets, anti-slip sheets, metal / resin molded parts, protection / fixing materials, cutting shades, summer ski sheets , Igniting agent, chemical bottle protective material, bottle / can protective material, floor covering of nursing home, bed covering of nursing home, nursing home bathroom flooring, wire drum protection material, fluorescent light protection material, for emergency disaster Flexible sheet, flexible sheet for exhibition, air cushion cushioning material, soft ground curing material, insulator, filter, horticultural / building surface greening support, wall surface cover, bio / chemical experiment sample holder, for cooking・ Oil and drainage sheets for lunch boxes, etc., general removal of liquid content from liquid-containing solids, sieves, partitioning materials, scaffolding materials, antifouling applications, protective materials for weight and valuables, cocoons Packaging of furniture, such as construction curing (walls, pillars), drum packaging, building underground drainage pit, animal-harm insect repellent, housing inner wall ventilation layer

== Applications suitable for spiral winding ==
Prevention of freezing of pipes and ducts such as water pipes, protection from cold damage of trees, protection of mooring posts for ships, prevention and protection of poles such as utility poles, temporary duct pipes, anti-slip sheets for handrails, electric wires and tubes Wiring (piping) separation, health equipment such as foot pot mat, indoor lighting cover, cat nail sharpening sheet, work material, infant toy, curing sheet, beast harm prevention device, water retention sheet, support material, box (single unit) Or a sheet material bonded to another sheet by heat fusion or the like can be made without using an adhesive, a screw, a clasp, etc.), a decorative material, a buffer for a moving body such as a vehicle Equipment, underground cable protection materials, simple water storage pools and columns, ducts, water pipes, cylindrical formwork materials, simple sleepers, drainage materials, industrial fasteners, concrete application rollers, moving objects, etc. Collision mitigation, fastener , Concrete type 押材, civil raising material

== Applications where parallel winding is suitable ==
Wire bundle protection, various packing materials, binding materials, tourniquet, gibbs, PP band core

It is the perspective view of the one side (surface) side which showed one Embodiment of the sheet-like material by this invention. It is a perspective view by the side of the other surface (back surface) of the sheet-like material shown in FIG. It is the perspective view which showed one Embodiment of the winding method of the sheet-like material by this invention, Comprising: It is the perspective view which showed the state in the middle of winding. It is the perspective view which showed one Embodiment of the winding method of the sheet-like material by this invention, Comprising: It is the perspective view which showed the state of winding completion. It is the perspective view which showed one Embodiment of the formation method of the tubular article and tubular article by this invention. It is explanatory drawing which shows the whole structure of the apparatus to which this invention method is applied. (A) is side sectional explanatory drawing of the shaping | molding apparatus, (b) is sectional drawing explanatory drawing in the AA of FIG. FIG. 8 is a cross-sectional explanatory view taken along line BB in FIG. 7. It is the C section enlarged view of FIG. It is a perspective view of an embossing roller. The some convex part of the sheet-like material which concerns on the 1st modification of this invention is expanded and shown, (A) is the top view, (B) is the side view. The some convex part of the sheet-like material which concerns on the 2nd modification of this invention is expanded and shown, (A) is the top view, (B) is the side view. The some convex part of the sheet-like material which concerns on the 3rd modification of this invention is expanded and shown, (A) is the top view, (B) is the side view. The several convex part of the sheet-like material which concerns on the 4th modification of this invention is expanded and shown, (A) is the top view, (B) is the side view. The several convex part of the sheet-like material which concerns on the 5th modification of this invention is expanded and shown, (A) is the top view, (B) is the side view.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Sheet-like object 2 Main-body part 3 Convex part row | line | column 4 Convex part 5 Concave part 6 Tubular object 7 200,300,400,500,600 Convex part 210,410 Groove part 510,610 Frustum part 520,620 Protrusion part 521 Cylindrical part 522 Tip

Claims (10)

  At least two rows of convex portions in which a plurality of hollow convex portions protruding from one surface are provided in a row at a predetermined interval are provided, and the other is provided on the inner surface side of each convex portion. A sheet-like material, wherein a concave portion that is open on the surface of the sheet is provided, and each convex portion can be fitted into each concave portion.   The outer surface of each convex portion is formed into a tapered surface whose diameter gradually increases from the tip to the base, and the inner surface of each concave portion is the same as the tapered surface of each convex portion while the diameter gradually increases from the tip to the root. The sheet-like object according to claim 1, wherein the sheet-like object is formed on a tapered surface having an angle.   Each convex part is formed in a cone shape or a truncated cone shape whose diameter gradually increases from the tip to the base, and each concave part gradually increases in diameter from the tip to the base and is fitted to each convex part. The sheet-like object according to claim 1, wherein the sheet-like object is formed in a conical or frustoconical space. Each of the convex portions protrudes from the truncated cone portion to the distal end side with a tapered surface having a diameter decreasing toward the distal end side, and at a different angle from the tapered surface of the truncated cone portion. A projecting portion configured to include a tapered surface whose diameter decreases toward the tip side,
The sheet-like object according to claim 1, wherein each of the concave portions is formed in a shape corresponding to the shape of the convex portion so that the concave portion can be fitted to the convex portion. Each of the protrusions is formed with a groove extending from the tip of the protrusion to the root,
Each said recessed part is formed with the protrusion part which fits into the groove part formed in the said convex part so that it can fit with the said convex part, The Claim 1 characterized by the above-mentioned. Sheet material. A plurality of the groove portions are formed on each of the convex portions,
The sheet-like object according to claim 5, wherein the groove portions are formed at positions symmetrical to each other when the convex portions are viewed from the front end side.   The sheet shape according to claim 5 or 6, wherein a cross-sectional shape of the groove portion when cut along a plane substantially perpendicular to a protruding direction of the convex portions is a substantially triangular shape or a substantially rectangular shape. Stuff.   The sheet-like material according to any one of claims 1 to 7, wherein the sheet-like material is wound spirally or in parallel on the peripheral surface of the enveloping body with each convex portion facing outward, and adjacent in the longitudinal direction. Edge portions or end portions to be overlapped with each other, and each convex portion of the lower convex portion row and each concave portion of the upper convex portion row located in the overlapping portion are fitted to each other to cover the sheet-like material. A method for winding a sheet-like material, wherein the method is fixed to a peripheral surface of a package.   A tubular object comprising the sheet-like material according to any one of claims 1 to 7, wherein the sheet-like material is curved in a spiral shape or in parallel with each convex portion facing outward, and is adjacent in the longitudinal direction. A tubular product characterized in that the edges are superposed on each other, and the convex portions of the lower convex row and the concave portions of the upper convex row located in the overlapping portion are fitted to each other.   Using the sheet-like material according to any one of claims 1 to 7, the sheet-like material is curved in a spiral or parallel manner with each convex portion facing outward, and adjacent edges in the longitudinal direction are mutually connected. A method for forming a tubular article, characterized in that the respective convex portions of the lower convex row and the concave portions of the upper convex row, which are superposed on each other, are fitted to each other, thereby forming a tubular shape. .

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