JP2012206271A - Cylindrical material, and method for manufacturing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cylindrical material which enables wood to be processed into a cylinder more simply at a low cost without using a specifically high and complicated high-cost treatment method, and is capable of being replaced even with a plastic material.SOLUTION: The cylindrical material 10 is formed into a cylindrical shape by bending a wood board and the grain direction of the wood board is the same as the axial direction of the cylindrical material 10. In a manufacturing process, a masking tape 5 for holding a structure is bonded to the wood board in a grain traversing direction before finally be formed. The concrete specifications or bonding methods of the masking tape 5 are not specifically restricted.

Description

  The present invention relates to a cylindrical material and a manufacturing method thereof, and more particularly to a wooden cylindrical material and a manufacturing method thereof that can provide a new use of wood.

  Conventionally, plastic materials have been frequently used for cylindrical portions of household electrical appliances (home appliances) such as a wind tunnel inside a domestic air cleaner. In other words, according to the plastic material, it is possible to directly mold the final form, which is not only advantageous in terms of manufacturing cost, but also excellent in various properties such as strength, durability and light weight. This is because home appliances and other products having advantages can be provided.

  However, on the other hand, plastic materials are made from fossil fuels, such as petroleum, which are expected to be depleted in the future, and they can generate toxic gases for the environment and human beings by combustion. In addition, the biodegradability is low and it is difficult to dispose of waste. In other words, durability is rather an environmental burden.

  On the other hand, for the prevention of global warming, the sound development and maintenance of forests is also important, and the regeneration and promotion of forestry and timber processing is an essential component in the healthy development and maintenance of such forests. In other words, from the perspective of creating a sustainable society and protecting ecosystems and the environment, the use and expansion of use of wood can be said to be an important technical issue.

  Under such circumstances, there has been a technical effort to replace a molded product, a member, or the like, which has been conventionally manufactured from a plastic material, with wood. A wood processing method by chemical treatment or the like has also been proposed, but as a technology for further reducing the environmental load, for example, the technology disclosed in the following non-patent literature is a highly advanced wood compression molding method using high-pressure steam. It is softened by a simple process and processed into a cylindrical shape.

MATERIAL STAGE Vol. 9, no. 9 2009, Mitsuhiko Tanahashi “~ Bending wood? ~ Development of rubber-elastic wood and three-dimensional deep drawing of wood”

  However, the processing of wood generally has a problem in that there are many parts that are difficult to process and the handmade elements are strong, resulting in high costs. In addition, conventional techniques such as softening processing and chemical processing by compression molding of wood using high-pressure steam require high-level, complicated and high-cost processing. There is a need for a technique that can process wood into a cylindrical shape by a simpler and lower cost method.

  Therefore, the problem to be solved by the present invention is based on the problems of the prior art, and it is possible to perform a cylindrical process on wood more easily and at a low cost without using a specially sophisticated, complicated and expensive processing method. It is possible to provide a tubular material that can be replaced by a plastic material and a manufacturing method thereof.

  As a result of earnestly working on the above problems, the present inventor has come up with the idea that the problem can be solved by a combination of simple methods of considering the directionality of a single plate and using a masking tape for retaining the structure. The present invention has been reached. That is, the invention claimed in the present application, or at least the disclosed invention, as means for solving the above-described problems is as follows.

[1] A cylindrical member formed by bending a wood board into a cylindrical shape, wherein the wood grain direction of the wood board is the same as the axial direction of the tubular material, and the structure is maintained in the cross-grain direction in the manufacturing process A cylindrical material to which a masking tape is attached.
[2] The cylindrical material according to [1], wherein the masking tape is attached to at least both ends.
[3] A cylindrical material manufacturing method for obtaining a cylindrical material by bending a timber board, in which a masking tape for holding a structure is stuck in the cross-grain direction, and then the timber board is bent in the cross-grain direction. A method for producing a cylindrical material, in which the masking tape is removed after the cylindrical shape is formed.
[4] The cylindrical material manufacturing method according to [3], wherein the masking tape is attached to at least both ends.
That is, this invention is a wooden cylindrical material comprised by the combination of simple processing methods, such as directionality of a single plate, and a masking tape, and its manufacturing method.

  Since the tubular material of the present invention and the manufacturing method thereof are configured as described above, according to this, a particularly high-level, complicated and high-cost processing method such as a compression molding method or chemical processing of wood using high-pressure steam is performed. Without using, it is possible to apply cylindrical processing to wood at an extremely simple and low cost. Since the present invention can be replaced with a plastic material having a high environmental load, for example, as a cylindrical material such as a wind tunnel portion of home appliances, an environment-friendly product can be developed.

It is explanatory drawing which shows this invention cylindrical material and its manufacturing method. It is explanatory drawing which shows this invention cylindrical material and its manufacturing method. It is explanatory drawing which put together the difference in the characteristic by the grain direction etc. of a timber board (single board).

Hereinafter, the present invention will be described in detail with reference to the drawings.
Drawing 1A and Drawing 1B are explanatory views showing this invention cylindrical material and its manufacturing method in order. As shown in these figures, the tubular member 10 is formed in a tubular shape by bending a wood plate (single plate) 2, and the direction of the grain 3 of the wood plate 2 is the tubular member 10. The main structure is that the structure holding masking tape 5 is attached in the transverse direction of the grain 3 in the manufacturing process and finally formed.

  Masking tape is generally known as a tape used for curing purposes in painting, but in short, it is a low-adhesive tape that can be easily peeled off even after being applied, and the remaining adhesive remains. There are so few that there is practically no problem. There are many applications such as curing in painting, plating and etching, and identification and protection of materials in printed circuit board manufacturing and handling.

  In the present invention, the function performed by the masking tape 5 is to prevent breakage of the lip portion, that is, to maintain the structure when the wood board 2 is formed into a cylindrical shape. As long as such a function can be sufficiently realized, the type of masking tape, adhesive strength, and other specific characteristics and specifications are not limited at all, and any of them can be used in the present invention. In order to sufficiently realize such a function, the masking tape 5 may be stuck in a direction crossing the wood grain 3 of the timber board, more preferably in a substantially orthogonal direction as shown in the figure.

  In the present invention, the term “substantially orthogonal” refers to a range that can be grasped in the same manner as orthogonal when the masking tape 5 is actually attached, even if it is not strictly orthogonal at an angle of 90 °.

  In order to maintain the structure, that is, to prevent cracking of the lip portion, it is desirable that the masking tape 5 is attached at least at two places in the timber board 2, that is, at both lip portions. This is because the masking tape 5 protects both the end portions and can effectively prevent breakage. In addition, as shown in the figure, the masking tape 5 at the both ends of the mouth may be attached in contact with the end of the end of the end, that is, the end of the end, but as long as the crack of the end of the end can be effectively prevented, It is good also as sticking inside.

  Of course, in addition to these two locations, one or more masking tapes 5 may be attached as illustrated in the figure. By increasing the number of sticking, the structure of the wood board 2 is made solid everywhere, and the occurrence of distortion, deformation and breakage (breakage) at both ends of the wood board 2 when forming the wood board 2 into a cylindrical shape, This is because it can be further reduced and prevented.

  The tree species of the wood board 2 for constituting the tubular member 10 is not limited at all as long as it has a grain, and any tree can be used. For example, Japanese conifers such as cedar, red pine, black pine, hiba, larch, spruce, sawara, yew, koyamaki, dogwood, hinoki, tsuga, himekomatsu, fir, todomatsu, juniper, kayak, ginkgo, togasawara, beech, mizunara, zelkova, There are no particular limitations on domestic hardwoods such as sakura, wig, camphor, tochinoki, chestnut, firewood, alder, and birch, and other foreign tree species.

  In addition, specific manufacturing conditions such as a bonding method, an adhesive used, and a bonding method when the wood board 2 is formed in a cylindrical shape to fix the form are not particularly limited in the present invention and meet the requirements of the present invention. As long as it is, any conventionally known method can be used.

  FIG. 2 is an explanatory diagram summarizing differences in characteristics depending on the grain direction and the like of a wood board (single board). In the figure, what is shown at the top is a method of bending a veneer in the direction of the grain to make it cylindrical. In this case, the end portion is difficult to break, but bending to form a tubular shape is not easy. Further, what is shown in the middle is a method of bending a single plate in a direction transverse to the grain direction or in a direction substantially orthogonal to form a cylinder. In this case, it is easy to bend the tube to form a clean shape, but it is not possible to prevent the end of the end from being easily broken.

  On the other hand, what is shown in the lower part is the present invention. The grain direction is the same as that shown in the middle, but masking tape is attached to both ends. By such a method, bending to form a tubular shape neatly is easy, cracking of the end of the neck can be prevented, and a high-quality wooden tubular material can be formed.

  As shown in FIGS. 1A and 1B, the tubular member 10 of the present invention has a masking tape 5 for holding the structure (for preventing cracking of the lip portion) appropriately pasted in the cross direction of the wood grain 3 of the wood board 2. It can be obtained by a manufacturing method in which the wood plate 2 is bent in the transverse direction of the grain 3 to form a cylinder, and the masking tape 5 is removed after the cylinder is formed.

  The specific specifications and characteristics of the masking tape 5 to be used are not particularly limited, as described above, but the time for applying the masking tape 5, the temperature at the time of processing and other various conditions are also set appropriately, and the structure The holding effect can be further enhanced. In addition, for the purpose of preventing breakage at both ends, it is desirable that the masking tape 5 is attached to at least both ends.

Examples of the present invention will be described below, but the present invention is not limited thereto.
Example A wind tunnel part of an air cleaner A beech material having a thickness of 1.6 mm and a width of 70 mm was prepared so that the grain direction was the width direction using a beech material. A masking tape for coating was wound and pasted in the longitudinal direction of the strip. There are two places on the top and both edges and the center. The strip with the tape attached was curved as designed and arranged into a generally cylindrical shape with an open portion for exhaust.

  Then, an upper bottom surface, that is, a “lid” member was placed on the upper edge of the belt-shaped material, and this was fixed to the belt-shaped material with an adhesive and a nail. After leaving for 24 hours, the masking tape was peeled off to complete the wind tunnel of the air cleaner. All of the above steps could be performed smoothly, and the wind tunnel portion of the manufactured air cleaner had no trace of masking tape attached, and the substantially cylindrical shape was firmly fixed and stable.

  According to the cylindrical material and the manufacturing method thereof of the present invention, it is possible to perform cylindrical processing on wood at an extremely simple and low cost without using a conventional high-level, complicated and high-cost processing method, and environmental load. High plastic material can be substituted. Furthermore, the present invention also leads to effective utilization of unused resources such as thinned wood, leads to the development of new uses of wood, and can contribute to the promotion of forestry and wood processing industries. Therefore, it is an invention with high industrial applicability not only in forestry and wood processing industries but also in related industrial fields.

2 ... Wood board (single board)
3 ... grain 5 ... masking tape 10 ... cylindrical material

Claims (4)

A cylindrical material formed into a cylindrical shape by bending a wood board, and the wood grain direction of the wood board is the same as the axial direction of the cylindrical material, and masking for structure retention in the cross-grain direction in the manufacturing process A tubular material to which tape is attached. The tubular material according to claim 1, wherein the masking tape is attached to at least both ends. A cylindrical material manufacturing method for obtaining a cylindrical material by bending a wood board, wherein a masking tape for holding a structure is stuck in a cross-grain direction, and then the wooden board is bent in a cross-grain direction to form a cylindrical shape. A method for manufacturing a cylindrical material, wherein the masking tape is removed after the treatment and the cylindrical shape is formed. The cylindrical material manufacturing method according to claim 3, wherein the masking tape is attached to at least both ends.

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