JP2005088594A - Manufacturing process of hollow main body constituting hollow member - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a manufacturing process of a hollow main body constituting a hollow member so as to save weight, improve stiffness, make abrasion proof, smooth a surface and lower a coefficient of thermal expansion. <P>SOLUTION: The manufacturing process of a hollow main body 10 comprises the following steps: (1) a step to temporary fix a honeycomb sheet 13 made of paper or a sheet metal such as aluminum, on a shaping core bar 11 except a part designed to be a thick wall section 10a; (2) a step to wind a yarn, which comprises an inorganic fiber of glass, carbon, etc. or a synthetic fiber such as nylon, and is expected to make a plurality of winding layers, with a predetermined angle of gradient on the shaping core bar 11 and the honeycomb sheet 13; (3) a step to extract the shaping core bar 11 and the honeycomb sheet 13 from an opening 10c formed in the center of the thick wall section 10a; and (4) a step to apply a finishing work on a cured surface of the member or the like. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention is used for winding up a relatively thin material such as a pillar, a supporting beam, a structural material for supporting and supporting a ship mast, or a flexible material such as a raw film, paper, or sheet. The present invention relates to a method for manufacturing a hollow material body constituting a hollow material.

  Structural materials that support and support pillars, support beams, and ship masts are necessary for everything. For example, those that support railway overhead lines as shown in FIG. 1 or those that support the pillars themselves. Needless to say, it is necessary. Such a structural material is required not only to have sufficient strength and rigidity but also to be light in weight. In order to support the overhead wire shown in FIG. 1, such an installation work must be performed, and it is important that the structural material is light in improving the workability in the installation work.

  In addition, in the structural material such as the support beam for the overhead wire as shown in FIG. 1, the wind pressure is suddenly applied when the train passes, so that it can sufficiently withstand this sudden force fluctuation. It must be. In other words, structural materials such as support columns and support beams do not need to have such a complicated structure, but they are not only light and strong, but also exposed to wind and rain and ultraviolet rays. However, excellent durability that does not change much is also required. The same applies to the mast of the ship, the pillar that supports the antenna, and the like.

  On the other hand, flexible materials such as raw film, paper or sheet are formed as very long materials, and in order to make these flexible materials into a certain product, they are wound up once. Is customary. In order to wind up a relatively thin material of a flexible material such as a raw film, paper, or sheet, a tubular hollow material is usually used. That is, the hollow material is fixed to an end of a flexible material such as a long original film, paper, or sheet, and then the hollow material is rotated to rotate the original film, paper, or sheet. It is used for the work of winding the flexible material, and plays an important role in winding and protecting the raw film. And flexible materials, such as this original fabric film, paper, or a sheet | seat, are conveyed to a predetermined | prescribed process process with the state wound up by the said hollow material.

  However, the flexible material such as the original film, paper, or sheet is very thin as in recent years (According to the latest technology, 0.5 μm film can be produced in the factory). And for magnetic tapes such as cassette tapes and video tapes that require a fairly high degree of homogeneity and high quality, wrinkles are generated when they are wound around a hollow material before commercialization. Considerable attention has been required for prevention and tear prevention. Moreover, in the winding operation for the hollow material, the hollow material is considerably high-speed (several thousand rpm, or in some cases, several tens of thousands rpm) in order to improve efficiency. There is a situation that must be rotated.

  In the winding operation, particularly in each of the manufacturing processes of the flexible material such as the original film, paper, or sheet, the flexible material such as the original film, paper, or sheet has been described above. When it becomes so delicate, it becomes a close-up that there was almost no problem in the past. The properties required for the hollow material, including some of them, are listed as follows.

(1) Although this hollow material is rotated at a high speed as described above, in order to improve the followability to the raw film at the time of winding, it is better that the moment of inertia when rotating is small, Therefore, the weight of the hollow material should be light. (Lightweight)
(2) Since a large amount of a flexible material such as a film, paper, or sheet is wound on this hollow material, the overall weight after the winding is completed is considerable. In doing so, the hollow material is used. In addition, when commercializing a raw film or sheet as a tape or the like, the hollow material is rotated around another machine, and the transportation and installation work is also performed using the hollow material. Therefore, a considerable strength is required for the hollow material itself. (Strength)
(3) “Wrinkles” should not occur in the middle of winding of the flexible material such as a raw film, paper, or sheet on the hollow material. When “wrinkles” occur, not only does this “wrinkle” itself reduce the product value, but also the portion that is wound up next to the flexible material such as the raw film, paper, or sheet is damaged. There is. This is particularly noticeable when the flexible material such as a raw film, paper, or sheet is thin. Therefore, in order to prevent such “wrinkles” from occurring, the surface of the hollow material has complete smoothness, and the hollow material itself bends during rotation. Must not. (Smoothness)
(4) The temperature of the hollow material may change considerably during the period from the beginning to the end of winding of the flexible material such as a raw film, paper, or sheet. This may be because the transported raw film or the like is heated or generates heat due to mechanical conditions such as high-speed rotation. However, as described above, “wrinkles” should not occur in the raw film or the like, but if the hollow material expands or contracts due to heat, this also causes the generation of the “wrinkles”. If this heat cannot be avoided, the hollow material needs to be one that does not expand and contract by heat, that is, one that has a low coefficient of thermal expansion. (Non-thermal expansion)
As this type of conventional hollow material made of reinforced plastic, there is one proposed in Patent Document 1, for example. The metal roll proposed in Patent Document 1 is
“A roll body in which a carbon fiber reinforced resin layer is bonded to an inner peripheral surface of a metal roll shell in a state where the arrangement direction of the carbon fibers and the axial direction of the metal roll shell coincide with each other, and the roll body A metal roll comprising a metal header that is fitted to the end of the metal and is engaged with the rotation support shaft "
It is.

  However, in this metal roll, a carbon resin fiber layer must be formed on the inner peripheral surface of the metal roll shell, but simply considering another member, another member is fixed to the inner peripheral surface of the pipe. This is extremely difficult. In addition, although this metal roll uses an extremely thin aluminum tube as its metal roll shell, it is considered that the strength cannot be secured so much when an aluminum tube is used as a base material. Furthermore, this metal roll must form a carbon resin fiber layer on the inner peripheral surface of the metal roll shell, but when heat is applied to the metal roll, stress is internally applied due to the difference between the materials of the two. This can cause the metal roll itself to bend. In such a case, the winding of the raw film or the like cannot be performed satisfactorily because “wrinkles” or the like occur. Therefore, in this metal roll, considerable consideration must be given to the material of the metal roll shell and the carbon resin fiber layer formed on the inner peripheral surface thereof.

Patent Document 2 shows a method for producing a pipe made of carbon fiber reinforced plastics.
“With respect to the method of manufacturing a thick carbon fiber reinforced plastic pipe having a structure including 50% or more of low angle winding of 30 degrees or less with respect to the axial direction of the pipe, the carbon fiber in which the amount of resin impregnated is controlled to 20 to 35% by weight Is wound with a desired composition ratio, and then wrapped with a heat-shrink tape on the surface and heat-cured to produce a carbon fiber reinforced plastic pipe manufacturing method "
It is.

  In this carbon fiber reinforced plastic pipe, it is necessary to wrap a heat shrink tape on the surface of the pipe and heat cure it. When the heat shrink tape wrapped is heat cured There is no guarantee that the surface is completely smooth. Therefore, what is shown in the above (3) is not considered at all in this method.

Therefore, for example, in Patent Document 3,
“A hollow material comprising a concentrically arranged inner cylinder having a circular cross section and an outer cylinder having a circular cross section, and a rib connecting the inner cylinder and the outer cylinder, the reinforcing continuous fibers Are arranged in the longitudinal direction of the hollow material, and the content is 50 to 75% by volume, and is composed of continuous fiber reinforced fiber reinforced plastics, and the outer diameter of the outer cylinder is 100 to 200 mm, A hollow material for glass fiber cloth, characterized in that at least the cross-winding part has the same cross-sectional shape "
Has been proposed. This hollow material is a glass fiber cloth that is the object of winding, and can secure sufficient strength to wind this, and it can reduce the overall weight because it is hollow It is thought that.

  However, in the hollow material shown in Patent Document 3, as described in the fourth column of the same Document 3, the eighth row and the following, “a plurality of radial ribs connecting the inner cylinder 2 and the outer cylinder 3”. 4 and the rib 4 extends in parallel to the axis of the hollow material 1 ”, so that the hollow material is like a raw film for video tape as described above. When trying to wind a very thin object in large quantities, the following problems arise. That is, if the rib 4 extends in parallel to the axis of the hollow material 1, the portion of the outer cylinder 3 that is not supported by the rib 4 is likely to be deformed. This is because, as a whole, the hollow material 1 is manufactured by using “pultrusion molding using continuous fibers” with a fiber reinforced plastic as a material (the fourth column, the 28th line and below of the same document 3). ), “Because the continuous fibers for reinforcement are arranged in the longitudinal direction of the hollow material 1”, the hollow material 1 is weak against the force applied in the radial direction by winding the raw film. Because.

In short, in the conventional technology for this kind of hollow material, when the original film or the like is the object of winding, a solution that has solved all the problems (1) to (4) described above is still proposed. It was not done.
Japanese Examined Patent Publication No.59-45843 JP 60-63137 A Japanese Utility Model Publication No. 5-15499

  The present invention has been made in view of the above circumstances, and the problem to be solved is a raw material for making a structural material such as a support beam light weight and high strength, or a material to be wound. As a roll of film, paper, sheet or the like, the conventional hollow material of this type has not yet coped with improvement in quality such as thinning and refinement of these flexible materials.

  The object of the present invention is to reduce the weight, hardness, wear resistance, smoothness of the surface of the hollow material, and reduce the coefficient of thermal expansion of the hollow material body constituting the hollow material. It is to provide a manufacturing method.

Before describing the manufacturing method according to the present invention for solving the above-described problems, first, a specific example of the hollow material 100 to be manufactured by the manufacturing method of the present invention will be described with reference to the best mode described later. It is as follows when the code | symbol used inside is attached | subjected and it enumerates.
(Specific example 1)
“A hollow material 100 used as a structural material,
The hollow material main body 10 constituting the hollow material 100 is positioned at both ends thereof, and a thick portion 10a to which the hollow material 100 is attached, and the hollow material main body 10 on the entire inside of the thick portion 10a. And having a thin portion 10b for weight reduction of 10,
The hollow material body 10 is composed of a plurality of winding layers 14 and 15 in which fibers formed of inorganic fibers such as glass and carbon or synthetic fibers such as nylon are wound at a predetermined inclination angle. Hollow material 100 used as "
(Specific example 2)
“A hollow material 100 used as a structural material,
The hollow material main body 10 constituting the hollow material 100 is positioned at both ends thereof, and a thick portion 10a to which the hollow material 100 is attached, and the hollow material main body 10 on the entire inside of the thick portion 10a. And having a thin portion 10b for weight reduction of 10,
The hollow material body 10 is formed by winding a prepreg-made glass cloth or carbon cloth or the like and a base layer 12 and fibers formed of inorganic fibers such as glass and carbon or synthetic fibers such as nylon with a predetermined inclination. Hollow material 100 used as a structural material comprising a plurality of winding layers 14 and 15 wound at an angle ”
as well as,
(Specific example 3)
“A hollow material 100 used for winding a flexible material such as an original film, paper, sheet, etc.
The hollow material main body 10 constituting the hollow material 100 is positioned at both ends of the hollow material main body 10 so that the outer shape is cylindrical, and the thick portions 10a for chucking the hollow material 100, and these thick portions 10a. And a thin-walled portion 10b that reduces the weight of the hollow material main body 10 on the entire inner side of
The hollow material body 10 is constituted by a plurality of winding layers 14 and 15 in which fibers formed of inorganic fibers such as glass and carbon or synthetic fibers such as nylon are wound at a predetermined inclination angle. Hollow material 100 for flexible materials such as films "
(Specific example 4)
“A hollow material 100 used for winding a flexible material such as an original film, paper, sheet, etc.
The hollow material main body 10 constituting the hollow material 100 is positioned at both ends of the hollow material main body 10 so that the outer shape is cylindrical, and the thick portions 10a for chucking the hollow material 100, and these thick portions 10a. And a thin-walled portion 10b that reduces the weight of the hollow material main body 10 on the entire inner side of
The hollow material body 10 is formed by winding a prepreg-made glass cloth or carbon cloth or the like and a base layer 12 and fibers formed of inorganic fibers such as glass and carbon or synthetic fibers such as nylon with a predetermined inclination. Hollow material 100 for a flexible material such as a raw film characterized by comprising a plurality of winding layers 14 and 15 wound at an angle ”
It is.

Here, the difference between each of the specific examples 1, 2, 3 and 4 is simply shown as follows.
Specific Example 1 is a hollow material 100 used as a structural material and has no base material layer 12 Specific Example 2 is a hollow material 100 used as a structural material and has a base material layer 12 Specific Example 3; A hollow material 100 that winds a flexible material and does not have a base material layer 12 Example 4: A hollow material 100 that winds a flexible material and has a base material layer 12

  The hollow material 100 according to the specific example 1, the specific example 2, the specific example 3 and the specific example 4 should have the above-described configuration to be a “structural material” or a so-called “core”. The hollow material 100 has the following functions or functions. First, the hollow member 100 has a very simple structure because the entire hollow member 100 is made of a hollow member body 10 made of fiber and resin made of glass, carbon, or the like. Has a thick portion 10a formed of fiber and resin made of glass or carbon. That is, the thick portion 10a is used when the entire hollow material 100 is supported by chucking of a rotating device (not shown), and the strength of the entire hollow material 100 is sufficient for the force during high-speed rotation. It is supposed to be endurable. Therefore, the hollow material 100 has sufficient strength due to the presence of the thick portions 10a at both ends even if the hollow portion 100 is thinned by the thin portions 10b. It is. (Ensuring strength)

  In addition, since a predetermined space by the thin portion 10b exists in the hollow material main body 10 constituting the hollow material 100, the entire weight thereof is determined by using only a conventional metal or a resin or the like. Even if it is formed, it is lighter than that having the same thickness in all parts. Of course, the thin-walled portion 10b can reduce the amount of material compared to the thin-walled portion 10b having the same thickness in all portions, and this material can be a resin that needs to be thermoset. For example, this means that the solvent treatment at the time of curing can be omitted by the thin portion 10b, and both the safety of the working environment and the protection of the natural environment are possible.

  In particular, in the hollow material 100, the hollow material body 10 constituting the hollow material 100 sequentially winds glass or carbon fiber or the like around the upper surface of the base material layer 12, and the first winding layer 14 and the second winding layer 15 Since the winding angle is changed, the gap between each of the first winding layer 14 and the second winding layer 15 is completely filled, and the outermost second winding layer 15 or the second winding layer 15 is formed. Since the surface of the coating layer 16 made of resin is a polished surface, its outer shape is close to a perfect circle. Therefore, since this hollow material 100 has a uniform mass as a whole, even if it is rotated at a high speed, no “blur” occurs. (Securing roundness)

  Moreover, since the hollow material main body 10 constituting the hollow material 100 is mainly composed of the first winding layer 14 and the second winding layer 15 formed of fibers made of glass or carbon, etc., these The first winding layer 14 and the second winding layer 15 have high strength as a whole. Moreover, if the base material layer 12 formed of prepregized carbon cloth or the like or glass cloth exists under the first winding layer 14 and the second winding layer 15, the strength thereof is further increased. Needless to say. In addition, carbon cloth or glass cloth, fibers made of glass or carbon, and resins for adhering them are low in thermal expansion coefficient, so that the thermal expansion coefficient in each layer of the hollow material body 10 is lowered. Therefore, even if heat is applied or a temperature difference is severe, no stress is generated in the interior. (Ensuring strength)

  As described above, since the hollow material 100 according to the specific example 1, the specific example 2, the specific example 3 and the specific example 4 is excellent in strength, it can be rotated at a high speed (tens of thousands of rpm). However, there is no wrinkle on the surface of the original film to be wound on the surface, or on the contrary, it is partially stretched or even damaged. In particular, when a raw film or the like is wound at a high speed, a so-called “clamping force” is applied to the hollow material 100, but the hollow material body 10 is made of a material having high strength and rigidity as described above. Since it is formed, the hollow material 100 is not deformed or bent at all.

  In the hollow body 10, the resin surface of the outermost second winding layer 15 and the surface of the coating layer 16 formed on the second winding layer 15 are polished with a surface roughness of 1 to 1.5. As a surface, the smoothness of the surface of the hollow material main body 10 can be further improved. When the resin surface of the second winding layer 15 and the surface of the coating layer 16 are polished to form a polished surface, the resin surface of the second winding layer 15 and the coating layer 16 have a sufficient thickness. Therefore, the internal second winding layer 15 and the like can be prevented from being exposed on the surface. (Smoothness)

  If the hollow material 100 is used many times, the resin surface and the coating layer 16 of the second winding layer 15 of the hollow material body 10 are stained and scratched. The surface of 16 is polished and regenerated, but the hollow material 100 having the above-described configuration is sufficiently rigid against the force applied during the polishing operation of the resin surface of the second winding layer 15 and the coating layer 16. Therefore, a sufficient polishing operation can be performed. In other words, the hollow material 100 is highly recyclable by polishing the resin surface of the second winding layer 15 and the coating layer 16.

  Accordingly, the hollow material 100 according to the specific example 1, the specific example 2, the specific example 3 or the specific example 4 has the thick portions 10a at both ends, and the thin portions 10b inside the thick portions 10a. Since it has been actively formed, sufficient strength and light weight necessary for high-speed rotation can be ensured, and wear resistance by resin, smoothing of the surface and reduction of thermal expansion coefficient can be achieved. It can be easily manufactured.

  Moreover, the hollow material 100 of the said specific example 1 or the specific example 2 forms the opening part 10c in the thick part 10a, and forms the engagement recess 10d for attachment in this opening part 10c. Also made. On the other hand, the hollow material 100 of the specific example 3 or the specific example 4 has an opening 10c formed in the thick portion 10a, and an engagement recess 10d for chucking is formed in the opening 10c. Things are also done.

  That is, in such a hollow material 100, as shown in FIGS. 2 and 7, the engagement recess 10 d in which the above-described attachment is performed or the chucking of the rotating device is locked is provided inside the thick portion 10 a. In this engagement recess 10d, another member corresponding to the engagement recess 10d is integrated on the upper surface of the molding core 11 described later in a state where a release agent for the thick portion 10a is applied. Therefore, it can be easily formed.

  Therefore, the hollow material 100 configured as described above exhibits the same function or action as the above-described specific example 1, specific example 2, specific example 3 or specific example 4, and easily locks the rotating device against chucking. It can be done.

Furthermore, when another specific example of the hollow material 100 that is an object to be manufactured by the manufacturing method according to the present invention is listed with the reference numerals used in the description of the best mode described below, Street.
(Specific example 5)
“A hollow material 100 used for winding a flexible material such as an original film, paper, sheet, etc.
The hollow material main body 10 constituting the hollow material 100 is positioned at both ends of the hollow material main body 10 so that the outer shape is cylindrical, and the thick portions 10a for chucking the hollow material 100, and these thick portions 10a. And a thin-walled portion 10b that reduces the weight of the hollow material main body 10 on the entire inner side of
A connecting plate 30 having an opening 31 is connected to each thick portion 10 a, and a cylindrical core member 20 having the same axis as the rotation axis of the hollow material 100 is integrated into each opening 31 of the connecting plate 30. Turn into
The hollow material main body 10 and the core material 20 are constituted by a plurality of winding layers 14 and 15 in which fibers formed of inorganic fibers such as glass and carbon or synthetic fibers such as nylon are wound at a predetermined inclination angle. Hollow material 100 for flexible material such as raw film "
Or
(Specific example 6)
“A hollow material 100 used for winding a flexible material such as an original film, paper, sheet, etc.
The hollow material main body 10 constituting the hollow material 100 is positioned at both ends of the hollow material main body 10 so that the outer shape is cylindrical, and the thick portions 10a for chucking the hollow material 100, and these thick portions 10a. And a thin-walled portion 10b that reduces the weight of the hollow material main body 10 on the entire inner side of
A connecting plate 30 having an opening 31 is connected to each thick portion 10 a, and a cylindrical core member 20 having the same axis as the rotation axis of the hollow material 100 is integrated into each opening 31 of the connecting plate 30. Turn into
Fiber formed by base material layer 12 formed by winding hollow material main body 10 and core material 20 by prepregized glass cloth or carbon cloth and the like, and inorganic fibers such as glass and carbon, or synthetic fibers such as nylon Is formed of a plurality of winding layers 14 and 15 wound at a predetermined inclination angle.
It is.

  That is, the hollow material 100 according to the specific example 5 or the specific example 6 is different from the hollow material 100 of the specific example 1, the specific example 2, the specific example 3 or the specific example 4 as shown in FIGS. Further, the hollow material main body 10 which is the outermost layer and the core material 20 accommodated therein via a predetermined space by the thin portion 10b on the hollow material main body 10 side are integrally connected by connecting plates 30 located at both ends. It is a thing. Of course, the structure itself of the hollow material main body 10 is the same as the hollow material main body 10 of Specific Example 3 or Specific Example 4 described above.

  In the hollow material 100 according to the specific example 5 or the specific example 6, the core material 20 constituting the hollow material 100 is formed by the same method as the hollow material main body 10 described above. That is, as shown in FIG. 5, the core material 20 is formed by sequentially winding glass or carbon fiber on the upper surface of the base material layer 22, and the winding angle between the first winding layer 24 and the second winding layer 25 is set. Since the change is made, the gap between each of the first winding layer 24 and the second winding layer 25 is completely filled, and its outer shape and inner shape are close to a perfect circle. Therefore, since this hollow material 100 has a uniform mass as a whole, even if it is rotated at a high speed, no “blur” occurs.

Now, in order to produce the hollow material 100 as the “structural material” or the hollow material main body 10 of the hollow material 100 as the “winding core”, claim 1, claim 2, claim 3, and claim 3. The measures taken by the invention according to No. 4 are as follows:
(Claim 1)
“A hollow having a hollow material 100 used as a structural material and having a thick portion 10a located at both ends and a thin portion 10b located integrally in the entire inside of the thick portion 10a. A method of manufacturing the material body 10 including the following steps.
(1) A step of temporarily fixing the honeycomb sheet 13 made of a thin metal plate such as paper or aluminum to the surface of the formed core bar 11 except for the portion that becomes the thick portion 10a;
(2) Winding fibers formed of glass, carbon or other inorganic fibers such as nylon, or synthetic fibers such as nylon on the cored bar 11 and honeycomb sheet 13 with a predetermined inclination angle. The step of:
(3) A step of extracting the cored bar 11 after curing the fiber and pulling out the honeycomb sheet 13 from the opening 10c formed at the center of the thick part 10a;
(4) Process of finishing the surface of the cured member "
(Claim 2)
“A hollow having a hollow material 100 used as a structural material and having a thick portion 10a located at both ends and a thin portion 10b located integrally in the entire inside of the thick portion 10a. A method of manufacturing the material body 10 including the following steps.
(1) A step of temporarily fixing the honeycomb sheet 13 made of a thin metal plate such as paper or aluminum to the surface of the formed core bar 11 except for the portion that becomes the thick portion 10a;
(2) A prepregized glass cloth or carbon cloth or the like serving as the base material layer 12 is wound on the formed core metal 11 and the honeycomb sheet 13, and the glass to be a plurality of winding layers 14 and 15 is formed thereon. Winding a fiber formed of an inorganic fiber such as carbon or a synthetic fiber such as nylon at a predetermined inclination angle;
(3) A step of drawing the honeycomb sheet 13 from the opening 10c formed at the center of the thick portion 10a after removing the formed core metal 11 after curing the prepreg cloth and fibers;
(4) Process of finishing the surface of the cured member "
(Claim 3)
“The hollow material 100 used to wind up a flexible material such as a raw film, paper, sheet, etc., and the outer shape is cylindrical, the thick portions 10a located at both ends, and the thickness A method of manufacturing a hollow material main body 10 having a thin-walled portion 10b located integrally with the entire inside of the portion 10a including the following steps.
(1) A step of temporarily fixing the honeycomb sheet 13 made of a thin metal plate such as paper or aluminum to the surface of the formed core bar 11 except for the portion that becomes the thick portion 10a;
(2) Winding fibers formed of glass, carbon or other inorganic fibers such as nylon, or synthetic fibers such as nylon on the cored bar 11 and honeycomb sheet 13 with a predetermined inclination angle. The step of:
(3) A step of extracting the cored bar 11 after curing the fiber and pulling out the honeycomb sheet 13 from the opening 10c formed at the center of the thick part 10a;
(4) Step of finishing the surface of the cured member "
as well as,
(Claim 4)
“The hollow material 100 used to wind up a flexible material such as a raw film, paper, sheet, etc., and the outer shape is cylindrical, the thick portions 10a located at both ends, and the thickness A method of manufacturing a hollow material main body 10 having a thin-walled portion 10b located integrally with the entire inside of the portion 10a including the following steps.
(1) A step of temporarily fixing the honeycomb sheet 13 made of a thin metal plate such as paper or aluminum to the surface of the formed core bar 11 except for the portion that becomes the thick portion 10a;
(2) A prepregized glass cloth or carbon cloth or the like serving as the base material layer 12 is wound on the formed core metal 11 and the honeycomb sheet 13, and the glass to be the plurality of winding layers 14 and 15 is formed thereon. Winding a fiber formed of an inorganic fiber such as carbon or a synthetic fiber such as nylon at a predetermined inclination angle;
(3) The step of drawing out the honeycomb sheet 13 from the opening 10c formed at the center of the thick portion 10a by removing the molding core 11 after curing the prepreg cloth and fibers;
(4) Step of finishing the surface of the cured member "
It is.

Here, the difference between the above claims 1 to 4 is simply shown as follows.
A method for producing the hollow material 10 as a structural material without the base material layer 12 A method for producing the hollow material 10 as a structural material with the base material layer 12 3: Method for producing hollow material 10 for flexible material without base layer 12 Claim 4: Method for producing hollow material 10 for flexible material with base material layer 12

  In other words, each of the manufacturing methods of the first to fourth aspects described above is used for winding the hollow material 100 as a “structural material” or a flexible material such as a raw film, paper, or sheet. The hollow material 100 according to each specific example is configured, the outer shape is cylindrical, and the thick portions 10a located at both ends, and the thin wall located integrally with the entire inside of these thick portions 10a A hollow material main body 10 having a portion 10b is manufactured. First, as shown in FIG. 3, a honeycomb sheet 13 made of a thin metal plate such as paper or aluminum is formed on the surface of a formed core metal 11 with a thickness. Temporarily fixing except for the part corresponding to the part 10a. The temporary fixing is performed by covering a predetermined portion of the surface of the wound honeycomb sheet 13 with a release material 17 that also serves as a release agent such as a vinyl tape.

  As the mold release material 17, in addition to the vinyl tape as described above (naturally, the back surface has adhesiveness), in short, as long as temporary fixing to the forming core 11 of the honeycomb sheet 13 can be performed, Various things such as so-called gum tape and cloth tape can be adopted.

  Now, the first winding layer 14 and the second winding are formed on the honeycomb sheet 13 temporarily fixed on the forming core 11 by the release material 17 as described above and on the forming core 11 where the honeycomb sheet 13 does not exist. A fiber formed of inorganic fibers such as glass and carbon or synthetic fibers such as nylon to be the layer 15 is directly wound at a predetermined inclination angle. Alternatively, as shown in FIG. 5, a prepreg serving as a base layer 12 is formed on the honeycomb sheet 13 temporarily fixed on the molding core 11 by the release material 17 and on the molding core 11 on which the honeycomb sheet 13 does not exist. Winded glass cloth or carbon cloth is wound on the base material layer 12 with glass, carbon or other inorganic fibers such as nylon, or synthetic fibers such as nylon, which are to become the first winding layer 14 and the second winding layer 15. The formed fiber is further wound at a predetermined inclination angle.

  After the winding as described above is completed, each material is inserted into a heating kettle or the like together with the molded core 11 to cure the prepreg cloth or fiber. When the curing of each material is completed, the cored bar 11 is pulled out from this. And as shown in FIG. 6, the honeycomb sheet | seat 13 is pulled out from the opening part 10c formed in the center of the thick part 10a. As described above, the release of the honeycomb sheet 13 from the cured body is performed by applying a release agent to the prepreg, so that if the operator puts his hand through the opening 10c formed in the thick portion 10a. Easy to do. In addition, the honeycomb sheet 13 is preferably literally a continuous “sheet” shape so that the honeycomb sheet 13 can be continuously peeled off.

  The surface of the member cured as described above is the outermost surface, and the surface of the second winding layer 15 is the surface of the hollow material body 10 that requires smoothness. If the coating layer 16 is formed on the surface of the second winding layer 15, it is necessary to polish the coating layer 16.

In order to solve the above problems, the means taken by the invention according to claim 5 is the manufacturing method according to any one of claims 1 to 4,
“After forming the inclined surfaces 13a toward the portions where the thick portions 10a of the hollow material main body 10 are formed at both ends of the honeycomb sheet 13 on the cored bar 11, the winding step (2) is performed. What I did "
It is.

  That is, when the honeycomb sheet 13 is temporarily fixed on the cored bar 11, the inclined surface 13 a is formed on each of both ends of the honeycomb sheet 13 as shown in FIG. 4. When the fibers or yarns constituting the first winding layer 14 and the second winding layer 15 are wound, the inclined surface 13a is wound from the top of the forming core 11 to the highest portion of the honeycomb sheet 13, or In the opposite direction, it can be performed stably.

  Therefore, according to the manufacturing method of claim 5, the fibers and yarns inclined at a predetermined angle can be stably wound, and the hollow material body 10 can be manufactured reliably and easily.

As described above in detail, in the inventions according to claims 1, 2, 3 and 4,
(Claim 1)
“A hollow having a hollow material 100 used as a structural material and having a thick portion 10a located at both ends and a thin portion 10b located integrally in the entire inside of the thick portion 10a. A method of manufacturing the material body 10 including the following steps.
(1) A step of temporarily fixing the honeycomb sheet 13 made of a thin metal plate such as paper or aluminum to the surface of the formed core bar 11 except for the portion that becomes the thick portion 10a;
(2) Winding fibers formed of glass, carbon or other inorganic fibers such as nylon, or synthetic fibers such as nylon on the cored bar 11 and honeycomb sheet 13 with a predetermined inclination angle. The step of:
(3) A step of extracting the cored bar 11 after curing the fiber and pulling out the honeycomb sheet 13 from the opening 10c formed at the center of the thick part 10a;
(4) Process of finishing the surface of the cured member "
as well as,
(Claim 2)
“A hollow having a hollow material 100 used as a structural material and having a thick portion 10a located at both ends and a thin portion 10b located integrally in the entire inside of the thick portion 10a. A method of manufacturing the material body 10 including the following steps.
(1) A step of temporarily fixing the honeycomb sheet 13 made of a thin metal plate such as paper or aluminum to the surface of the formed core bar 11 except for the portion that becomes the thick portion 10a;
(2) A prepregized glass cloth or carbon cloth or the like serving as the base material layer 12 is wound on the formed core metal 11 and the honeycomb sheet 13, and the glass to be a plurality of winding layers 14 and 15 is formed thereon. Winding a fiber formed of an inorganic fiber such as carbon or a synthetic fiber such as nylon at a predetermined inclination angle;
(3) A step of drawing the honeycomb sheet 13 from the opening 10c formed at the center of the thick portion 10a after removing the formed core metal 11 after curing the prepreg cloth and fibers;
(4) Process of finishing the surface of the cured member "
(Claim 3)
“The hollow material 100 used to wind up a flexible material such as a raw film, paper, sheet, etc., and the outer shape is cylindrical, the thick portions 10a located at both ends, and the thickness A method of manufacturing a hollow material main body 10 having a thin-walled portion 10b located integrally with the entire inside of the portion 10a including the following steps.
(1) A step of temporarily fixing the honeycomb sheet 13 made of a thin metal plate such as paper or aluminum to the surface of the formed core bar 11 except for the portion that becomes the thick portion 10a;
(2) Winding fibers formed of glass, carbon or other inorganic fibers such as nylon, or synthetic fibers such as nylon on the cored bar 11 and honeycomb sheet 13 with a predetermined inclination angle. The step of:
(3) A step of extracting the cored bar 11 after curing the fiber and pulling out the honeycomb sheet 13 from the opening 10c formed at the center of the thick part 10a;
(4) Step of finishing the surface of the cured member "
as well as,
(Claim 4)
“The hollow material 100 used to wind up a flexible material such as a raw film, paper, sheet, etc., and the outer shape is cylindrical, the thick portions 10a located at both ends, and the thickness A method of manufacturing a hollow material main body 10 having a thin-walled portion 10b located integrally with the entire inside of the portion 10a including the following steps.
(1) A step of temporarily fixing the honeycomb sheet 13 made of a thin metal plate such as paper or aluminum to the surface of the formed core bar 11 except for the portion that becomes the thick portion 10a;
(2) A prepregized glass cloth or carbon cloth or the like serving as the base material layer 12 is wound on the formed core metal 11 and the honeycomb sheet 13, and the glass to be a plurality of winding layers 14 and 15 is formed thereon. Winding a fiber formed of an inorganic fiber such as carbon or a synthetic fiber such as nylon at a predetermined inclination angle;
(3) The step of drawing out the honeycomb sheet 13 from the opening 10c formed at the center of the thick portion 10a by removing the molding core 11 after curing the prepreg cloth and fibers;
(4) Step of finishing the surface of the cured member "
There is a feature in the structure, and by this, the manufacturing of the hollow material main body 10 for constituting the hollow material 100 described above can be reliably and easily performed.

Moreover, according to the invention which concerns on Claim 5, about the manufacturing method in any one of the said Claims 1-4,
“After forming the inclined surfaces 13a toward the portions where the thick portions 10a of the hollow material main body 10 are formed at both ends of the honeycomb sheet 13 on the cored bar 11, the winding step (2) is performed. What I did "
There is a characteristic in the structure, and by this, the fibers and yarns inclined at a predetermined angle can be stably wound, and the hollow material body 10 can be manufactured reliably and easily.

  Next, the invention according to each claim configured as described above will be sequentially described with respect to the hollow material 100 shown in the drawings. Needless to say, the hollow material 100 is manufactured by each of the above inventions. .

  FIG. 1 shows a state in which a hollow material 100 manufactured by the manufacturing method of the present invention is used as a “structural material” supporting a railway overhead wire. The cross section is as shown in FIG. The hollow material 100 is also used as a “core” as shown in FIG. 7 or FIG. 8, and the hollow material 100 used as these “structural material” or “core” is These are manufactured by a manufacturing method as shown in FIGS.

  As shown in FIGS. 2 and 7, these hollow members 100 are configured by a hollow member body 10 whose outer shape is a cylindrical shape. As shown in FIG. 2, the hollow material main body 10 is positioned at both ends thereof, and the thick portions 10 a for chucking the hollow material 100, and the inner portions of the thick portions 10 a It has a thin portion 10b for reducing the weight of the hollow material body 10.

  The hollow material main body 10 including these thick portions 10a is manufactured by a method as shown in FIG. 5, and as a result, the hollow material main body 10 is entirely formed of fiber and resin made of glass or carbon. In other words, there is a predetermined space in the hollow material main body 10 due to the thin wall portion 10b, and the entire weight of the hollow material main body 10 is not limited to those using only conventional metals or resins. It is lighter than that having the same thickness. Moreover, even if the hollow material 100 is thin in the center portion by the thin portion 10b, the hollow member 100 has sufficient strength due to the presence of the thick portion 10a at both ends. .

  In particular, the hollow material body 10 constituting the hollow material 100 is mainly composed of a first winding layer 14, a second winding layer 15, and a base material layer 12 as required, as shown in FIG. Further, the coating layer 16 is formed as necessary. FIG. 5 shows a state in which the cored bar 11 is still inserted for the sake of explanation. The molded cored bar 11 is removed after the hollow material body 10 is completed. It is not a component of the hollow material 100 manufactured by this manufacturing method.

  The hollow material body 10 is manufactured as follows. In order to manufacture the hollow material main body 10, first, as shown in FIG. 3, the honeycomb sheet 13 made of a thin metal plate such as paper or aluminum corresponds to the thick portion 10 a on the surface of the forming core 11. Temporarily fix except the part that becomes. This temporary fixing is performed on the surface of the wound honeycomb sheet 13 with a release material 17 that also serves as a release agent such as a vinyl tape.

  When the honeycomb sheet 13 is temporarily fixed on the cored bar 11, an inclined surface 13 a is formed for each of both ends as shown in FIG. 4. When the fibers or yarns constituting the first winding layer 14 and the second winding layer 15 are wound, the inclined surface 13a is wound from the top of the forming core 11 to the highest portion of the honeycomb sheet 13, or In the opposite direction, it can be performed stably. Of course, it is not necessary to form the inclined surface 13a if the fibers and yarns can be wound on the end of the honeycomb sheet 13 which is vertically cut from the cored bar 11. If the inclined surface 13a is formed, the operation becomes very easy.

  The honeycomb sheet 13 is configured by partially connecting paper and metal strips to each other. When the honeycomb sheet 13 is expanded, the hexagonal column-shaped space as shown in FIG. 3 is continuously formed. It can be formed, and is temporarily fixed while being wound around the surface of the molded core 11. Note that a release agent may be applied to the back side of the honeycomb sheet 13 so that the cored bar 11 can be easily pulled out.

  As shown in FIG. 5, glass, carbon, etc. to be the first winding layer 14 and the second winding layer 15 are provided on the temporarily fixed honeycomb sheet 13 and the formed cored bar 11 on which the honeycomb sheet 13 does not exist. Basically, a fiber formed of an inorganic fiber or a synthetic fiber such as nylon is wound at a predetermined inclination angle. Further, on the temporarily fixed honeycomb sheet 13 and on the forming core 11 where the honeycomb sheet 13 does not exist, as shown in FIG. Wrap. Further, on the base material layer 12, a fiber formed of an inorganic fiber such as glass, carbon, or a synthetic fiber such as nylon to be the first winding layer 14 and the second winding layer 15 is further wound at a predetermined inclination angle. It is also done.

  As this base material layer 12, the thing of various aspects can be employ | adopted, a big cloth-like thing may be sufficient, a tape-like thing may be sufficient, and also it may be a nonwoven fabric-like thing. In short, any form may be used as long as it can be impregnated with a thermosetting resin and can be made into a prepreg. Various materials can be used as the material constituting the base material layer 12, but any material such as natural fiber, inorganic fiber, and organic fiber may be used.

  That is, the tape, woven fabric, or nonwoven fabric constituting the base material layer 12 is not particularly limited as long as it has flexibility and high strength. For example, a known fiber such as a natural fiber, an inorganic fiber, an organic fiber, or the like made of a belt-like material obtained by impregnating a resin, a woven fabric woven using the fiber as a warp or a weft, the fiber used And those made of non-woven fabric formed by Examples of inorganic fibers include carbon fibers, glass fibers, alumina fibers, and silicon nitride fibers. Examples of organic fibers include polyolefin fibers such as aramid fibers, polyamide fibers, and polyethylene fibers, polyester fibers, and polyphenylsulfone fibers. In this embodiment, a reinforcing tape and fiber made of glass fiber are used.

  In addition, the reinforcing tape may be formed by arranging a plurality of continuous reinforcing fibers in one direction and impregnating the reinforcing fibers with a resin. The reinforcing fiber may be any one selected from the various fibers described above, or may be a hybrid type in which a plurality of the fibers are mixed. As the resin to be impregnated, a resin containing a thermosetting resin such as a room temperature curable epoxy resin or a thermosetting epoxy resin or a polyester resin can be used.

  After the winding as described above is completed, each material is inserted into a heating kettle or the like together with the molded core 11 to cure the prepreg cloth or fiber. When the curing of each material is completed, the molding core 11 is removed from this. And as shown in FIG. 6, the honeycomb sheet | seat 13 is pulled out from the opening part 10c formed in the center of the thick part 10a. As described above, the release of the honeycomb sheet 13 from the cured body is performed by applying a release agent to the prepreg, so that if the operator puts his hand through the opening 10c formed in the thick portion 10a. Easy to do. In addition, the honeycomb sheet 13 is preferably literally a continuous “sheet” shape so that the honeycomb sheet 13 can be continuously peeled off.

  The surface of the member cured as described above is the outermost surface, and the second winding layer 15 is the surface in order to obtain the hollow material body 10 that requires smoothness. If the coating layer 16 is formed on the surface of the second winding layer 15 and the surface of the second winding layer 15, it is necessary to polish the coating layer 16.

  The base material layer 12 is formed by winding a prepreg-made glass cloth or carbon cloth in two layers around a cored core 11 that is a central object. This is for smoothing the inner surface of the hollow material body 10 after completion and increasing the accuracy of the inner diameter. In this case, the cored bar 11 is of course close to a perfect circle, and a release agent is applied to the surface as necessary. The reason for applying the release agent is to facilitate the operation when the molded core 11 is removed from the hollow material body 10 after completion.

  In addition, in order to wind the base material layer 12 around the cored bar 11, the base material layer 12 is arranged so that the cloth is inclined with respect to the cored bar 11. The reason for this is to prevent the base material layer 12 from being loosened during the winding when the first winding layer 14 described later is wound on the base material layer 12.

  Further, in this embodiment, the number of turns of the base material layer 12 is two, but the number of turns is not limited to this, and may be one or three or more as described below. The base material layer 12 facilitates and ensures the subsequent winding operation of the first winding layer 14 and the second winding layer 15 rather than ensuring the strength after the hollow material body 10 is completed. Yes, for example, when the diameter of the hollow material body 10 itself is small, it may be performed once. On the other hand, when the diameter of the hollow material body 10 is large, it may be wound three or more times. The hollow material body 10 is manufactured to have a final diameter of 25 mm to 400 mm or more and a length of about 300 mm to 6000 mm or more.

  The first winding layer 14 is formed by winding (winding) fibers sequentially on the upper surface of the base material layer 12 that is rotated together with the molded core 11. The fibers forming the first winding layer 14 are made of inorganic fibers such as glass and carbon, or synthetic fibers such as nylon, and are prepreg before being wound. Of course, this winding is performed in a state where a predetermined tension is applied to each fiber. The inclination angle of the fibers forming the first winding layer 14 with respect to the axis of the core 11 is 45 degrees in this embodiment. Winding is performed at a predetermined gap from one end side to the other end side of the forming core 11 at this inclination angle, and when it hits the other end, similar winding operations are sequentially performed at an opposite inclination angle (135 degrees). To go. The layers formed by such winding (one turn of the fiber as one layer) were 6 layers in this example. Since the first winding layer 14 is a main part that gives out the strength and the like of the hollow material 100, the number of layers formed of fibers may be larger.

  The second winding layer 15 is basically formed by the same method as that for forming the first winding layer 14, but differs in the inclination angle and the number of windings with respect to the molded core 11. That is, the inclination angle of the fibers forming the second winding layer 15 is 75 degrees in this embodiment, and the number of turns is three. At this inclination angle, similarly to the case of the first winding layer 14 described above, the molded cored bar 11 is wound with a predetermined gap from one end side to the other end side. The same winding operation is sequentially performed at an angle (105 degrees). As described above, the reason why the inclination angle of the fiber is changed as compared with the case of the first winding layer 14 is that it is necessary to fill each gap of the fibers forming the first winding layer 14. That is, even if there is a gap at any part other than the crossing part of the fibers forming the first winding layer 14, the fibers having different inclination angles are wound from above. This is because the gap can be completely filled.

  Further, the number of windings of the second winding layer 15 is set to three, and the number of turns of the second winding layer 15 is less than that of the first winding layer 14. This second winding layer 15 does not guarantee the strength as the hollow material 100, and is Therefore, if the surface of the hollow member 100 is made smooth by the second winding layer 15, the number of times is smaller than that in the present embodiment. It may be.

  The material constituting the first winding layer 14 and the second winding layer 15 can basically be any of natural fibers, organic fibers, and inorganic fibers including metal fibers. The typical examples of each fiber are listed as follows.

Organic fiber: aramid fiber, polyamide fiber such as nylon, polyolefin fiber such as polyethylene fiber, polyester fiber, polyphenylsulfone fiber Inorganic fiber: glass fiber, alumina fiber, silicon nitride fiber, carbon fiber and hollow according to the present invention In the material 100, the coating layer 16 by an epoxy resin was given to the outermost layer, and the thickness was 0.3-0.4. Further, the surface of the coating layer 16 was mechanically polished to finish a surface of 1 to 1.5 to obtain a polished surface.

  The hollow material main body 10 configured as described above has a center circularity of 6/100, which is more accurate than the conventional core circularity of 15/100, and its Young's modulus is 1800 kgf / mm. It was. In addition, in the hollow material 100 formed as described above, the molded core 11 is extracted before finishing the surface thereof, that is, after each layer and each film are cured. The extraction of the molded core 11 can be performed even better if a mold release agent is applied to the molded core 11 and the end of each layer is locked to the locking member. The molding core 11 is forcibly pulled out by a machine. Thereafter, the hollow material main body 10 is subjected to surface finishing, and unnecessary end portions of the hollow material main body 10 are cut into finished products.

  Further, as shown in FIG. 7, the hollow material main body 10 constituting the hollow material 100 is formed with an opening 10c in the thick portion 10a, and in the opening 10c for chucking. The engagement recess 10d may be formed. This engagement recess 10d is formed by integrating another member corresponding to this on the upper surface of the above-described molding core 11 in a state where a release agent for the thick portion 10a is applied. . If such an engagement recess 10d is formed, the rotation device can be easily locked against chucking.

  8 and 9, the hollow material 100 according to the specific example 5 or 6 is shown. The hollow material 100 has the connecting plates 30 attached to both ends of the hollow material main body 10 described above. In the opening 31 formed at the center of the connecting plate 30, the core member 20 in a state of being aligned with the axial center of the hollow material main body 10 is supported. The core material 20 further improves the rigidity of the hollow material 100, and can improve drainage in washing the hollow material 100 after completion, and can easily remove dust adhered electrostatically. In order to achieve this, a cylindrical body that is completely opened at both left and right ends is used.

  The core material 20 is formed by the same method as the hollow material body 10 described above. As shown in FIG. 5, glass or carbon fiber 23 or the like is sequentially wound around the upper surface of the base material layer 22. Since the winding angle is changed between the first winding layer 24 and the second winding layer 25, the gap between each of the first winding layer 24 and the second winding layer 25 is completely filled, and its outer shape is a perfect circle. It is close.

  The core material 20 must be fixed and integrated with the hollow material main body 10, but this is performed by a connecting plate 30 formed in a donut-shaped disk shape. As shown, the fixed core member 20 is positioned at the axial center of the hollow member main body 10. That is, the core member 20 serves as a rotating shaft when the hollow member 100 is rotated, and has rigidity necessary for the rotating shaft.

  Various types of integration of the core material 20 to the hollow material main body 10 by the connecting plate 30 are adopted, and a flange portion that contacts the end surface of the hollow material main body 10 is formed on the outer periphery of the connecting plate 30. The hollow material body 10 and the core material 20 may be integrated while covering the end surface of the hollow material body 10 with this flange portion. Further, for example, a screw is cut in a portion of the connecting plate 30 where the hollow material body 10 and the core material 20 are fitted, and a screw corresponding to this is formed in a corresponding part of the hollow material body 10 and the core material 20. Alternatively, the connection plate 30 may be screwed to the hollow material body 10 and the core material 20. Furthermore, the outer diameter of the fitting part of the connecting plate 30 is made the same as that of the corresponding part of the hollow material main body 10 and the core material 20, and it is integrated by applying an adhesive and forcibly fitting. May be. Of course, the above screw and adhesive may be used in combination.

  In any of the hollow materials 100 described above, as shown in FIG. 8, a mark 18 is formed at a predetermined position of the hollow material body 10, and this mark 18 is thereby formed by chucking of a rotating device or the like. The chucking position is clearly indicated. The weight of the hollow material 100 wound with the raw film or the like is considerable, and when this is hung on a rotating device, a supporting device or a rewinding device, the position of the hollow material 100 is changed from the beginning of the work. In many cases, it is necessary to decide to some extent, and in this case, the mark 18 is quite useful.

In the hollow material 100 according to the specific examples 1, 2, 3, and 4 detailed above,
“A hollow material 100 used as a structural material,
The hollow material main body 10 constituting the hollow material 100 is positioned at both ends thereof, and a thick portion 10a to which the hollow material 100 is attached, and the hollow material main body 10 on the entire inside of the thick portion 10a. And having a thin portion 10b for weight reduction of 10,
The hollow material body 10 is composed of a plurality of winding layers 14 and 15 in which fibers formed of inorganic fibers such as glass and carbon or synthetic fibers such as nylon are wound at a predetermined inclination angle.
as well as,
“A hollow material 100 used for winding a flexible material such as an original film, paper, sheet, etc.
The hollow material main body 10 constituting the hollow material 100 is positioned at both ends of the hollow material main body 10 so that the outer shape is cylindrical, and the thick portions 10a for chucking the hollow material 100, and these thick portions 10a. And a thin-walled portion 10b that reduces the weight of the hollow material main body 10 on the entire inner side of
The hollow material body 10 is composed of a plurality of winding layers 14 and 15 in which fibers formed of inorganic fibers such as glass and carbon or synthetic fibers such as nylon are wound at a predetermined inclination angle.
The main feature of the structure is that it can be easily manufactured by reducing weight, hardness, wear resistance, smoothing the surface and reducing the coefficient of thermal expansion. It is a material 100.

  That is, according to the hollow material 100, since the thin-walled portion 10d is positively formed in the hollow material main body 10, the weight can be reduced even if it has a very large diameter. Yes (achieving light weight). Moreover, by having comprised as mentioned above, the rigidity of this hollow material 100 will become sufficient irrespective of being lightweight, and also the intensity | strength which can fully oppose the winding force of an original film is high. (Ensuring strength). Furthermore, the hollow material main body 10 on which the original film is directly wound does not always bend or deform partially, and thus “wrinkles” are generated in the wound original film or the like. There is nothing (ensuring smoothness).

  Furthermore, according to this hollow material 100, since the hollow material body 10 on which the raw film or the like is directly wound is formed of a material having a small thermal expansion coefficient, it greatly expands against mechanical heat generated during winding. This is because there is no occurrence of “wrinkles” in the raw film or the like to be wound around the surface of the hollow material body 10 (ensuring non-thermal expansion).

  Since the hollow material 100 is mainly composed of the hollow material main body 10, the hollow material 100 can be used even when the surface of the hollow material main body 10 or scratches or stains generated on the coating layer 16 are removed by polishing or grinding. Therefore, a perfect circular state can be secured in all portions of the hollow member 100, and the hollow member 100 can be sufficiently reused.

  For each of the hollow members 100, if an opening 10c is formed in the thick portion 10a, and an engagement recess 10d for attachment or chucking is formed in the opening 10c, The same effect as that of the hollow material 100 described above can be exhibited, and the hollow material 100 with improved workability when applied to a rotating device or the like can be obtained.

Furthermore, in the hollow material 100 according to the specific example 5 or 6, similarly,
“A hollow material 100 used for winding a flexible material such as an original film, paper, sheet, etc.
The hollow material main body 10 constituting the hollow material 100 is positioned at both ends of the hollow material main body 10 so that the outer shape is cylindrical, and the thick portions 10a for chucking the hollow material 100, and these thick portions 10a. And a thin-walled portion 10b that reduces the weight of the hollow material main body 10 on the entire inner side of
A connecting plate 30 having an opening 31 is connected to each thick portion 10 a, and a cylindrical core member 20 having the same axis as the rotation axis of the hollow material 100 is integrated into each opening 31 of the connecting plate 30. Turn into
The hollow material body 10 and the core material 20 are composed of a plurality of winding layers 14 and 15 in which fibers formed of inorganic fibers such as glass and carbon or synthetic fibers such as nylon are wound at a predetermined inclination angle.
The main features of the structure are that, in addition to achieving weight reduction, it is possible to achieve further hardness, wear resistance, surface smoothing and thermal expansion coefficient. It can be set as the hollow material 100 which can achieve reduction.

It is a front view which shows the use condition of the hollow material which is a manufacturing object of this invention. It is sectional drawing of the hollow material. It is a front view which shows roughly the process of temporarily fixing the honeycomb sheet | seat on the surface of a shaping | molding metal core in the method based on this invention which forms the hollow material main body which comprises the same hollow material. FIG. 4 is a partially enlarged sectional view of FIG. 3. It is the fragmentary perspective view which showed schematically the process of forming the hollow material main body or core material which comprises the hollow material. It is sectional drawing which shows the process of removing the honeycomb sheet | seat from the hollow material main body in order to form the hollow material. It is a fragmentary perspective view of the hollow material manufactured by the manufacturing method of this invention. It is a fragmentary perspective view of the hollow material which concerns on invention of the specific example 5 and the specific example 6. FIG. It is sectional drawing of the hollow material.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Hollow material 10 Hollow material main body 10a Thick part 10b Thin part 10c Opening part 10d Engaging recess 11 Molding metal core 12 Base material layer 13 Honeycomb sheet 13a Inclined surface 14 First winding layer 15 Second winding layer 16 Coating layer 17 Mold release material 18 Mark 20 Core material 30 Connecting plate 31 Opening

Claims (5)

A hollow material body comprising a hollow material used as a structural material, and having a thick portion located at both ends and a thin portion located integrally with the entire inside of these thick portions, The method of manufacturing including each process of.
(1) A step of temporarily fixing a honeycomb sheet made of a thin metal plate such as paper or aluminum on the surface of the formed core bar except for the portion to be the thick part;
(2) A step of winding fibers formed of inorganic fibers such as glass, carbon, or synthetic fibers such as nylon on the formed core metal and honeycomb sheet at a predetermined inclination angle;
(3) The step of drawing out the honeycomb sheet from the opening formed at the center of the thick part after extracting the cored bar after curing the fiber;
(4) A step of finishing the surface of the cured member. A hollow material body comprising a hollow material used as a structural material, and having a thick portion located at both ends and a thin portion located integrally with the entire inside of these thick portions, The method of manufacturing including each process of.
(1) A step of temporarily fixing a honeycomb sheet made of a thin metal plate such as paper or aluminum on the surface of the formed core bar except for the portion to be the thick part;
(2) A prepregized glass cloth or carbon cloth or the like serving as a base material layer is wound on the formed core metal and the honeycomb sheet, and a plurality of inorganic fibers such as glass and carbon to be used as a plurality of winding layers thereon Alternatively, a step of winding a fiber formed of a synthetic fiber such as nylon at a predetermined inclination angle;
(3) A step of drawing out the honeycomb sheet from an opening formed at the center of the thick portion after removing the formed core bar after curing the prepreg cloth and fibers;
(4) A step of finishing the surface of the cured member. It constitutes a hollow material used for winding flexible materials such as raw film, paper, sheet, etc., and the outer shape is cylindrical, and the thick parts located at both ends, and the thick parts The hollow material main body which has the thin part located integrally in the whole direction is manufactured including the following each process.
(1) A step of temporarily fixing a honeycomb sheet made of a thin metal plate such as paper or aluminum on the surface of the formed core bar except for the portion to be the thick part;
(2) A step of winding fibers formed of inorganic fibers such as glass, carbon, or synthetic fibers such as nylon on the formed core metal and honeycomb sheet at a predetermined inclination angle;
(3) The step of drawing out the honeycomb sheet from the opening formed at the center of the thick part after extracting the cored bar after curing the fiber;
(4) A step of finishing the surface of the cured member. It constitutes a hollow material used for winding flexible materials such as raw film, paper, sheet, etc., and the outer shape is cylindrical, and the thick parts located at both ends, and the thick parts The hollow material main body which has the thin part located integrally in the whole direction is manufactured including the following each process.
(1) A step of temporarily fixing a honeycomb sheet made of a thin metal plate such as paper or aluminum on the surface of the formed core bar except for the portion to be the thick part;
(2) A prepregized glass cloth or carbon cloth or the like serving as a base material layer is wound on the formed core metal and the honeycomb sheet, and a plurality of inorganic fibers such as glass and carbon to be used as a plurality of winding layers thereon Alternatively, a step of winding a fiber formed of a synthetic fiber such as nylon at a predetermined inclination angle;
(3) A step of drawing out the honeycomb sheet from an opening formed at the center of the thick portion after removing the formed core bar after curing the prepreg cloth and fibers;
(4) A step of finishing the surface of the cured member. After forming the inclined surfaces toward the portions where the thick portions of the hollow material main body are formed at both ends of the honeycomb sheet on the core metal, the winding step (2) is performed. The method for producing a hollow material main body according to any one of claims 1 to 4, wherein:

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