JP6108506B1 - Warpage prevention member and method of manufacturing warpage prevention member - Google Patents

Abstract

An object of the present invention is to provide a novel warpage preventing member excellent in handleability and a method for producing the warpage preventing member. A first base material having adhesiveness to the surface of a member or a product and a first base material 10 are laminated, and a plurality of reinforcing fibers are arranged in the same or substantially the same direction to form a flat shape as a whole. The reinforcing fiber group 11A to be exhibited and the second base material 12 laminated on the reinforcing fiber group 11A are provided, and the reinforcing fiber group 11A is impregnated with the adhesive 11B, and the first base material 10 is impregnated with the adhesive 11B. The second substrate 12 and the reinforcing fiber group 11A are integrally bonded. [Selection] Figure 2

Description

  The present invention relates to a sheet-like warpage preventing member for preventing warpage of a member or product that may be warped, and a method for manufacturing the warpage preventing member.

  Conventionally, doors such as a front door (sliding door) and a sliding door are installed at the boundary between two spaces having different environmental conditions, so that warping may occur due to a difference in environmental conditions such as humidity and temperature. It is necessary to prevent the door from warping because it causes trouble in opening and closing when the door warps. Moreover, when a top plate such as a table is placed on the top plate, the top plate may be warped (bent). If the top plate is warped, the functionality of the top plate is lowered, so it is necessary to prevent the top plate from warping.

  Therefore, for example, a sheet-like carbon fiber reinforced plastic having a thickness of about 0.7 mm to 1.2 mm is made of a wooden core material that constitutes a door or a top plate so that the fiber direction of the carbon fiber is along the warping direction. Affixing to the upper and lower surfaces of the cross section prevented the core material from warping.

  Affixing carbon fiber reinforced plastic to the core material is done in the manufacturing process of doors and tables, but before attaching, it is necessary to cut the carbon fiber reinforced plastic into the desired shape and dimensions according to the location of the application. There is. However, due to the difference between carbon fiber reinforced plastic and wooden core material, tools for cutting carbon fiber reinforced plastic and tools for molding / cutting core materials were different, and cutting work was time consuming. In addition, the sheet-like carbon fiber reinforced plastic is thin and very soft, so that it is difficult to handle in the pasting operation.

  The present invention has been made in view of the above circumstances. That is, the place made into the subject is providing the manufacturing method of the novel warpage prevention member excellent in the handleability, and the warpage prevention member.

The configuration of the present invention made to solve the above problems will be described below.
(1) A warpage preventing member according to the present invention is a warp-preventing member that is bonded to the surface of a member or product that may be warped, and has a first base material having adhesion to the surface of the member or product. A reinforcing fiber group that is laminated on the first base material, and a plurality of reinforcing fibers are arranged in the same or substantially the same direction to form a flat shape as a whole, and a second base material that is laminated on the reinforcing fiber group The reinforcing fiber group is impregnated with an adhesive, and the first base material, the second base material, and the reinforcing fiber group are integrally bonded by the adhesive. Features. The warpage preventing member of the present invention has a sheet shape as a whole. However, the “sheet shape” is not limited to the word “sheet shape” itself, but “band shape”, “cloth shape”. , “Tape-like” and “elongated”, etc. In addition, the term “warp” includes general terms such as “deflection” and “bending” which mean that a vertical load is applied to the member or product and the member or product is bent in a bow. In addition, “warping” means that a slender rod-like or flat plate bends in one direction along a bow, but also bends in a wavy shape, or a flat plate is twisted and bends in multiple directions. Also means.

(2) About the curvature prevention member described in (1), a said 1st base material and a said 2nd base material can be comprised with wood.
(3) About the curvature prevention member described in (1) or (2), the some reinforcement fiber which comprises the said reinforcement fiber group can be comprised with carbon fiber.
(4) About the curvature prevention member described in (3), the fiber direction of the said carbon fiber and the grain of the wood which comprises the said 1st base material and the said 2nd base material can be made substantially parallel.

  (5) Moreover, the manufacturing method of the curvature prevention member which concerns on this invention is a manufacturing method of the sheet-like curvature prevention member adhere | attached on the surface of the member or product which a curvature may produce, and several reinforcement fiber is the same or The reinforcing fiber group, which is arranged in substantially the same direction and has a flat shape as a whole, is impregnated with an adhesive, and the reinforcing fiber group is bonded to the surface of the member or product before the adhesive is cured. A first step of sandwiching the first base material and the second base material, and applying a compressive load in a direction in which the reinforcing fiber group is sandwiched from the surface side of the first base material and the second base material And a second step of curing the adhesive to integrally bond the first base material, the second base material, and the reinforcing fiber group.

According to the warpage preventing member according to the present invention, the first base material, the second base material, and the reinforcing fiber group having adhesiveness to the surface of the member or product are integrally bonded by the adhesive, so that the warpage prevention is achieved. It is possible to prevent the warpage of the member or the product by simply bonding the member to the surface of the member or the product as it is from the surface side of the first base material. Therefore, the handleability of the warpage preventing member is improved.
Further, according to the method for manufacturing a warpage preventing member according to the present invention, the adhesive is cured while the reinforcing fiber group is impregnated with the adhesive, and the first base material, the second base material, and the reinforcing fiber group are obtained. Since they are integrally coupled, the manufacturing process of the warp preventing member can be shortened. And it is possible to prevent the warpage of the member or the product by simply bonding the warp prevention member thus manufactured to the surface of the member or the product as it is from the surface side of the first base material. is there. Therefore, the handleability of the warpage preventing member is improved.

It is an exploded view of the example in which the curvature prevention member concerning a 1st embodiment of the present invention is used for a wooden door. It is explanatory drawing of the structural example of a curvature prevention member. It is a perspective view of the structural material of a curvature prevention member. It is explanatory drawing of the manufacturing method of a curvature prevention member. It is explanatory drawing of the manufacturing method of a curvature prevention member. It is explanatory drawing of the structural example of the curvature prevention member which concerns on other embodiment of this invention.

(First embodiment)
First, an example in which the warp preventing members 1 and 2 according to the first embodiment of the present invention are used for a rectangular wooden door D will be described. FIG. 1 is an exploded view of a wooden door D in which warpage is prevented by the warp prevention members 1 and 2. As shown in FIG. 1, warpage preventing members 1 and 2 are bonded to both surfaces (cross-sectional upper and lower surfaces) of a core material D1 serving as a framework of a wooden door D with a predetermined woodworking adhesive. On the surfaces of the warp preventing members 1 and 2, a face material D2 having a thickness of about 6 mm is bonded with a predetermined woodworking adhesive.

  The core material D1 is a long side direction of the wooden door D between the two vertical axis members D11 arranged at a predetermined interval in the short side direction of the wooden door D and the two vertical axis members D11. And seven horizontal shaft members D12 arranged at predetermined intervals. The horizontal shaft members D12 are arranged at equal intervals from both ends of the two vertical shaft members D11 toward the center.

  In addition, the vertical axis | shaft material D11 is a columnar body of a rectangular cross section, and is shape | molded by length = 2000mm, width = 100mm, and thickness = 50mm. On the other hand, the horizontal shaft member D12 is a columnar body having a rectangular cross section, and is formed to have a length = 800 mm, a width = 70 mm, and a thickness = 50 mm.

  The warpage preventing member 1 has a rectangular strip shape as a whole, is formed to have a length = 2000 mm, a width = 100 mm, and a thickness = about 2 mm, and is bonded to both surfaces of each vertical axis member D11. On the other hand, the warpage preventing member 2 also has a rectangular strip shape as a whole, and is formed to have a length = 800 mm, a width = 70 mm, and a thickness = about 2 mm, and the horizontal shaft material D12 disposed at both ends and the middle. Bonded to both surfaces. Although the warpage prevention member 1 and the warpage prevention member 2 are different in length and width, since other configurations such as the type and structure of the constituent materials constituting each are the same, the warpage prevention member 1 will be described below. To explain.

  2A is a perspective view of the warpage preventing member 1, FIG. 2B is an AA end view, and FIG. 2C is a BB end view. The warpage preventing member 1 includes a strip-shaped first base material 10, a strip-shaped reinforcing material 11 stacked on the first base material 10, and a strip-shaped second base material 12 stacked on the reinforcing material 11. It has a strip shape as a whole.

  The reinforcing material 11 is made of carbon fiber reinforced plastic, and a plurality of PAN-based carbon fibers are arranged in the same direction or substantially in the same direction to form a reinforcing fiber group 11A having a strip shape (flat shape) as a whole, and a reinforcing fiber group And an adhesive 11B impregnated in 11A. The adhesive 11B impregnated in the reinforcing fiber group 11A penetrates the entire interface between the first base material 10 and the reinforcing fiber group 11A and the entire interface between the second base material 12 and the reinforcing fiber group 11A. The first base material 10, the second base material 12, and the reinforcing fiber group 11A are bonded and integrally joined by the adhesive 11B.

  FIG. 3A shows a perspective view of the first base material 10. The first base material 10 is composed of a single plate (for example, cedar), and has a width (short side direction length) L1a = 100 mm, a length (long side direction length) L1b = 2000 mm, and a thickness t1 = 1 mm. It is formed into a rectangular cross section. The first base material 10 is molded so that the grain direction (the fiber direction of the wood) is substantially parallel to the long side direction. In addition, since the fiber direction of wood is not necessarily linear, the fiber direction of the wood constituting the first base material 10 is generally parallel to the long side direction as a whole. " The second base material 12 is the same as the first base material 10 in terms of material, shape, and dimensions (the second base material 12 is constituted by a single plate, and the single plate constituting the second base material 12; Since it is the same as the single plate which comprises the 1st base material 10, the description about the 2nd base material 12 is abbreviate | omitted.

  FIG. 3B shows a perspective view in which a portion of the reinforcing material 11 is extracted. Here, “extraction” means that the reinforcing material 11 is composed of a carbon fiber reinforced plastic consisting of a reinforcing fiber group 11A and an adhesive 11B impregnated in the reinforcing fiber group 11A. Instead of “the reinforcing material 11 is an independent part from the beginning and the first base material 10 and the second base material 12 are attached to the reinforcing material 11”, as will be described later, the uncured adhesive 11 </ b> B. In a state where the reinforcing fiber group 11A impregnated with is sandwiched between the first base material 10 and the second base material 12, the adhesive 11B is cured, and the first base material 10, the second base material 12, and the reinforcing fiber group 11A are cured. It is because it is manufactured by integrating. In other words, the reinforcing material 11 is not a part that has been completed independently from the beginning, but is generated in the manufacturing process of the warpage preventing member 1.

  The reinforcing material 11 has a strip shape of a substantially rectangular cross section with a width (length in the short side) L2a = 100 mm, a length (length in the long side direction) L2b = 2000 mm, and a thickness t2 = 0.07 mm. The reinforcing fiber group 11A constituting the reinforcing material 11 is opened, and the reinforcing fiber group 11A as a whole has the shape and dimensions (width (length in the short side direction) L2a = 100 mm, length (length) of the reinforcing material 11. (Long side direction length) L2b = 2000 mm, and thickness t2 = 0.07 mm. That is, a plurality of carbon fibers having a length of 2000 mm are arranged in an open state in a substantially rectangular cross section having a width of 100 mm and a height of 0.07 mm.

Further, the reinforcing fiber group 11A has more gap portions (void portions) than a so-called “raw yarn” in which thousands to tens of thousands of carbon fibers are arranged in a bundle having a substantially circular cross section. This is for improving the impregnation efficiency of the adhesive 11B in the reinforcing fiber group 11A, as will be described later. The weight per square meter of the reinforcing fiber group 11A is about 100 g / m ² . The weight per square meter of the reinforcing fiber group 11A is not limited to this and can be set as appropriate. Here, in order to improve the impregnation efficiency of the adhesive 11B, it is desirable that the weight per square meter is low. However, as the tensile strength of the reinforcing fiber group 11A decreases as it decreases, the necessary reinforcing fiber group 11A. It is desirable to set appropriately according to the balance between the tensile strength (design strength) and the impregnation efficiency of the adhesive 11B. For example, the weight per square meter of reinforcing fiber group 11A is ^{preferably 30g / m 2 ~200g / m 2} , ^{further, 30g / m 2 ~60g / m} 2 is preferred. Further, the reinforcing fiber group 11A does not necessarily need to be in an open state, and as a result, a plurality of carbon fibers are arranged substantially uniformly so as to have an appropriate thickness, number, and weight per square meter. What is necessary is just to be a state where the gap portion is formed sparsely as a whole.

  The adhesive 11B is composed of an adhesive for woodworking. Here, the adhesive 11B is “for woodworking” because the reinforcing fiber group 11A is impregnated with the adhesive 11B, and the wooden first base material 10 and the wooden second base material 12 are bonded by the adhesive 11B. This is to ensure adhesion.

  The reinforcing fiber group 11A in the reinforcing material 11 is impregnated with an adhesive 11B, and the gap between the carbon fibers constituting the reinforcing fiber group 11A is filled with the adhesive 11B. The first base material 10, the reinforcing fiber group 11A, and the second base material 12 are bonded to each other by the adhesive 11B impregnated in the reinforcing fiber group 11A. The two base materials 12 are integrally coupled. That is, the reinforcing material 11 made of carbon fiber reinforced plastic is laminated between the first base material 10 and the second base material 12. Although not shown, a mesh-like film (length = 2000 mm, width = 100 mm: the shape in plan view is the same as or substantially the same as that of the reinforcing fiber group 11A) is arranged at the center of the cross section of the reinforcing fiber group 11A. ing. This is because when the reinforcing fiber group 11A is impregnated with the adhesive 11B, the opened state of the opened reinforcing fiber group 11A is maintained, and the adhesive 11B is infiltrated into the entire reinforcing fiber group 11A. This is for impregnation. In addition, what is arranged in the cross-sectional approximate center of 11 A of reinforced fiber groups may not be a mesh-like film but the film in which the hole was carried out in the grid | lattice form. In addition, the thickness of the film is very thin compared to the reinforcing fiber group 11A.

  In such a warp preventing member 1, the axial direction of the longitudinal axis material D11, the carbon fiber direction of the reinforcing fiber group 11A, and the grain direction (fiber direction) of the first base material 10 and the second base material 12 are parallel. In this manner, the same adhesive for woodworking as the adhesive 11B is attached to both surfaces (upper and lower surfaces of the vertical axis member D11). When the wooden door D including the vertical axis material D11 is installed at the boundary between two spaces having different environmental conditions such as a front door, the wooden door D may be, for example, the difference in environmental conditions such as humidity and temperature between indoors and outdoors. Attempts to deform in the direction of the long side (extended on the outdoor side and contract on the indoor side). However, since extension and contraction in the axial direction of the surface of the longitudinal axis material D11 are mainly constrained by the tensile strength and compression strength of the reinforcing fiber group 11A in the warp preventing member 1, the longitudinal direction of the wooden door D extends along the long side direction. Warping is prevented.

  Similarly, the warp preventing member 2 is also made of the same woodworking adhesive as the adhesive 11B so that the carbon fiber direction and the grain direction (fiber direction) are parallel to the axial direction of the horizontal shaft material D12. Since it is affixed on both surfaces of D12 and restrains the expansion | extension and shrinkage | contraction with respect to the axial direction of the surface of the horizontal shaft material D12, the curvature along the short side direction of the wooden door D is prevented.

  Further, the total weight of the warp preventing member 1 is about 85 g, which is very light, light and easy to carry (good transportability), and the warp preventing member 1 is attached to the vertical axis material D11 of the wooden door D to be warped. The warp along the long side direction of the longitudinal axis material D11 can be prevented only by sticking with the same woodworking adhesive as 11B. Besides, when the wooden door D is manufactured as a new product, for example, after installing the wooden door D on which the warp preventing members 1 and 2 are not attached and the warp preventing measures are not applied, the face material The warp of the wooden door D can be easily made by simply sticking the warp preventing members 1 and 2 to the portions corresponding to the vertical axis D11 and the horizontal axis D12 on both surfaces of D2 with the same adhesive for woodworking as the adhesive 11B. Can be prevented. That is, the versatility of the warp preventing members 1 and 2 is high (useful).

  Here, although the reinforcing material 11 contains the adhesive 11B, it is very thin and the reinforcing material 11 has a very low (soft) cross-sectional rigidity, so it is vulnerable to bending and twisting. Therefore, since the reinforcing material 11 alone has low independence and is easily deformed, it takes time to apply the work to the vertical axis material D11. In addition, the reinforcing material 11 alone includes a plurality of carbon fibers and is very thin, so that it is difficult to cut it into a desired shape / dimension with a saw or an electric saw. Therefore, basically, the reinforcing material 11 (particularly, the portion of the reinforcing fiber group 11A) plays a role of preventing the warp of the vertical axis material D11, but the reinforcing material 11 alone is not easy to handle. Therefore, the longitudinal axis material D11 is handled by integrally treating the reinforcing material 11 as the warpage preventing member 1 in a state where the reinforcing material 11 is sandwiched between the first base material 10 and the second base material 12 having a higher cross-sectional rigidity than the reinforcing material 11. Affixing work and cutting work are easy, and handling is improved as compared with the case of only the reinforcing material 11. That is, in the usage state of the warpage preventing member 1, the first base material 10 and the second base material 12 function as holding members for holding the shape of the reinforcing material 11 and preventing the deformation of the reinforcing material 11. And since the 1st base material 10 and the 2nd base material 12 are comprised by the single board (wood), the core which comprises the wooden door D which is the sticking object (warp prevention object) of the warp prevention members 1 and 2 When cutting the material D1, the face material D2, and the like, the warp preventing members 1 and 2 can be cut into a desired shape and size using the same saw and electric saw.

  The thicknesses of the first base material 10 and the second base material 12 are not particularly limited, and the thickness may be thicker or thinner than 1 mm, but the total thickness of the vertical axis material D11 and the warpage preventing member 1 is not limited. In a certain range, it is desirable that the thicknesses of the first base material 10 and the second base material 12 be thin to some extent. This is because the warpage prevention member 1 exerts a warpage prevention function by being affixed to the surface of a warpage prevention target member such as the vertical axis member D11, but from the neutral axis of the warpage prevention target member to the reinforcing material 11. This is because as the distance increases, the cross-sectional secondary moment of the reinforcing member 11 increases, and a higher restraining effect on warping can be obtained. However, if the thickness of the first base material 10 and the second base material 12 becomes too thin, the warp preventing members 1 and 2 may become fragile as a whole and the handling property may be lowered. For example, the thickness of 10 and the second substrate 12 is preferably 0.25 mm to 15 mm, and more preferably 1 mm to 3 mm.

  Moreover, in 1st Embodiment, although the 1st base material 10 and the 2nd base material 12 are comprised by the single plate whose thickness is 1 mm, you may be comprised by a still thinner single plate. In addition, either the first base material 10 and the second base material 12 or one of the first base material 10 and the second base material 12 is configured by a veneer having a thickness of 0.3 mm, for example. May be. Further, the thicknesses of the first base material 10 and the second base material 12 may be determined by comprehensively considering the economics such as the price of the material used as the base material of the first base material 10. . For example, when the plywood (plywood) is cheaper than the veneer, either the first base material 10 and the second base material 12 or either the first base material 10 or the second base material 12 May be formed of a 3 mm thick plywood (plywood) or the like.

In addition, the first base material 10, the reinforcing fiber group 11A, and the second base material 12 are bonded to each other by the adhesive 11B impregnated in the reinforcing fiber group 11A. The two base materials 12 are integrally coupled. Here, the thickness of the reinforcing fiber group 11A is 0.07 mm and very thin, and the weight per square meter is 100 g / m ² , and an appropriate gap portion is formed between the carbon fibers, Furthermore, since the first base material 10 and the second base material 12 are made of wood, the adhesive 11B surely impregnates the reinforcing fiber group 11A, and the first base material 10 and the second base material by capillarity. It penetrates into the substrate 12. Therefore, the adhesiveness between the first base material 10, the second base material 12, and the reinforcing fiber group 11A is improved, and the first and second base materials 10 and 12 made of wood, and the reinforcing fiber group 11A made of carbon fiber, Can be reliably performed, and further, delamination of the warp preventing members 1 and 2 can be prevented.

  The thickness of the reinforcing fiber group 11A is not limited to 0.07 mm and can be set as appropriate. In order to improve the impregnation efficiency of the adhesive 11B, it is desirable that the thickness of the reinforcing fiber group 11A is thin. However, since the tensile strength of the reinforcing fiber group 11A decreases as the thickness decreases, the reinforcing fiber group 11A is required. It is desirable to set appropriately according to the balance between the tensile strength (design strength) and the impregnation efficiency of the adhesive 11B. For example, the thickness of the reinforcing fiber group 11A is preferably 0.05 mm to 0.25 mm, and more preferably 0.05 mm to 0.1 mm.

  Next, the manufacturing method of the curvature prevention member 1 which concerns on 1st Embodiment of this invention is demonstrated.

  First, as shown in FIG. 4A, a predetermined tool such as an adhesive application roller R is applied to the entire surface of the sheet-like first base sheet 10S that is the base of the first base 10 for woodworking. An adhesive 11B made of an adhesive is applied (first adhesive application step). The first base sheet 10S is made of a single plate having the same thickness as the first base 10 and is formed in a rectangular shape in plan view with a short side direction length L3a = 300 mm and a long side direction L3b = 3000 mm. .

  Next, as shown in FIG. 4B, the reinforcing fiber group 11A is the same as the first base sheet 10S in plan view (short side direction length L4a = 300 mm, long side direction L4b = 3000 mm plane) The reinforcing fiber sheet 11AS molded in a rectangular shape is placed on the surface of the first base sheet 10S on which the adhesive 11B is applied so that the outer periphery thereof coincides, and the entire surface of the reinforcing fiber sheet 11AS is adhesively applied. The adhesive 11B is impregnated from the lower side of the reinforcing fiber sheet 11AS (pushing the adhesive 11B from the reinforcing fiber sheet 11AS) by being pushed by a predetermined tool such as a roller R for use (first adhesive impregnation step). The reinforcing fiber sheet 11AS is composed of a carbon fiber spread sheet that has been subjected to a predetermined spread process. Here, the reinforcing fiber sheet 11AS is composed of a spread sheet, and the film contained in the reinforcing fiber sheet 11AS is in a mesh shape, so that the reinforcing fiber sheet 11AS is smoothly impregnated with the adhesive 11B.

  Next, as illustrated in FIG. 4C, the adhesive 11 </ b> B is applied from the surface side of the reinforcing fiber sheet 11 </ b> AS placed on the first base sheet 10 </ b> S with a predetermined tool such as the adhesive application roller R. Thus, the adhesive 11B is impregnated from the upper side of the reinforcing fiber sheet 11AS (the adhesive 11B is rubbed into the reinforcing fiber sheet 11AS) (second adhesive impregnation step). In the second adhesive impregnation step, the reinforcing fiber sheet 11AS is completely impregnated with the adhesive 11B, and the adhesive 11B is applied to the entire surface of the reinforcing fiber sheet 11AS.

  Next, as shown in FIG. 4 (d), the adhesive is applied to the entire surface of the second base material sheet 12S that is the source of the second base material 12 and has the same material, shape, and dimensions as the first base material sheet 10S. The adhesive 11 </ b> B made of an adhesive for woodworking is applied with a predetermined tool such as a roller R (second adhesive application step).

  Next, as shown to Fig.5 (a), the 2nd base material sheet 12S in which the 2nd adhesive agent application process was performed is outer periphery from the surface side in which the adhesive agent 11B was applied to the surface of the reinforced fiber sheet 11AS. Are placed so as to coincide with each other, and the reinforcing material sheet 11S serving as the base of the reinforcing material 11 is sandwiched between the first base material sheet 10S and the second base material sheet 12S (a sandwiching step).

  Thus, the “first base sheet 10S and the first base sheet 10S generated by performing the first adhesive application step, the first adhesive impregnation step, the second adhesive impregnation step, the second adhesive application step, and the sandwiching step” “A sandwich of the reinforcing fiber sheet 11AS (reinforcing material sheet 11S) impregnated with the uncured adhesive 11B by the second base sheet 12S” is a source of the warp preventing member 1, and is described below. Is referred to as "warp prevention sheet 1S".

  Then, the first adhesive application step, the first adhesive impregnation step, the second adhesive impregnation step, the second adhesive application step, and the sandwiching step are performed a predetermined number of times (for example, 10 times), and a predetermined number (for example, 10) warpage prevention sheets 1S are generated, and as shown in FIG. 5B, in a state where a predetermined number of warpage prevention sheets 1S are aligned and stacked, a predetermined number of warpage prevention sheets 1S are laminated in the whole direction ( A compression load is applied to the first base sheet 10S and the second base sheet 12S (the direction in which the reinforcing material sheet 11S is sandwiched) (compression process).

  In addition, as a method of applying a compressive load in the compression step, a method in which a predetermined number of warp prevention sheets 1S are laminated on a flat surface such as a floor and compressed by, for example, a predetermined compression device from above. There is. Further, as a method of applying a compressive load in the compression step, there is a method of placing a weight in a lattice shape on a predetermined number of stacked warp prevention sheets 1S. Furthermore, as a method for applying a compressive load in the compression step, there is a method in which the four corners of a predetermined number of stacked warp prevention sheets 1S are clamped with a C-type vise. When applying a compressive load to the predetermined number of warp prevention sheets 1S, it is desirable to distribute the compressive load evenly so as not to cause a bias in a portion to which the compressive load is applied in plan view. This is because the reinforcing fiber sheet 11AS of each warpage preventing sheet 1S is impregnated uniformly and reliably with the adhesive 11B.

  Next, in a state where a compression load is applied to the predetermined number of warp prevention sheets 1S, the adhesive 11B is cured for a predetermined period (for example, 5 hours) until it is completely cured (curing process). In the compression step and the curing step, the reinforcing fiber sheet 11AS in which the opened state is maintained is impregnated with the adhesive 11B, and the adhesive 11B includes the first base sheet 10S, the second base sheet 12S, and the reinforcing fiber sheet 11AS. Are bonded together. In addition, when the curing process is completed, the adhesive 11B of the warp prevention sheet 1S is cured.

  Finally, by using a cutting tool such as a saw or a cutting device such as an electric saw (not shown), as shown in FIG. 5C, the warp preventing sheet 1S is formed in a desired shape and size (for example, length in the short side direction = When it is cut so as to have a length of 100 mm and a length in the long side direction = 2000 mm (the broken line in FIG. 5C represents an example of the cut position), as shown in FIG. The warpage preventing member 1 is completed (cutting process). In addition, about the manufacturing method of the curvature prevention member 2, when it is the manufacturing method of the curvature prevention member 1, a 1st adhesive agent application process, a 1st adhesive agent impregnation process, a 2nd adhesive agent impregnation process, a 2nd adhesive agent application process Then, the pinching step, the compression step, and the curing step are performed, and in the cutting step, the warp preventing sheet 1S is cut so as to have the size and shape of the warp preventing member 2.

  In the cutting process, attention is paid to the cutting direction (cutting position) in relation to the grain. For example, in the case of forming in a belt shape like the warp preventing member 1, the long side direction is made parallel to the direction along the warp of the warp preventing object, so that the long side direction and the grain direction are substantially parallel. It is desirable to cut so that

  In addition, when shipped in the state of the warp prevention sheet 1S, it is desirable to make the warp prevention sheet 1S compact (small) by winding the warp prevention sheet 1S into a roll after the curing process is completed (miniaturization). Process). Thus, since the warpage prevention sheet 1S is made compact by winding the warpage prevention sheet 1S in a roll in the miniaturization step, the transportability (ease of carrying) of the warpage prevention sheet 1S is improved.

  On the other hand, when shipping in the state of the warp preventing member 1, the miniaturization process can be omitted, and the cutting process can be performed after the compression process. Even when the warp preventing member 1 is shipped, the period from the end of the curing process to the cutting process is long, and when the warp preventing sheet 1S is stored in a predetermined place, the size is reduced after the compressing process. A process can also be performed.

  Thus, the first adhesive application step, the first adhesive impregnation step, the second adhesive impregnation step, the second adhesive application step, the sandwiching step, the compression step, the curing step, the miniaturization step, and the cutting step are performed. Thus, the warp preventing member 1 is manufactured. According to this manufacturing method, the first base material is made while the reinforcing fiber group 11A (the reinforcing fiber sheet 11AS) and the adhesive 11B are combined by impregnating the reinforcing fiber group 11A (the reinforcing fiber sheet 11AS) with the adhesive 11B. 10, the reinforcing fiber group 11 </ b> A, and the second base material 12 (the first base material sheet 10 </ b> S, the reinforcing fiber sheet 11 </ b> AS, and the second base material sheet 12 </ b> S) can be bonded together with the adhesive 11 </ b> B and integrally bonded. Further, the manufacturing process of the warp preventing member 1 (warp preventing sheet 1S) is shortened, and the manufacturing efficiency of the warp preventing member 1 (warp preventing sheet 1S) can be improved.

  Further, in the manufacture of the warp preventing member 1 (warp preventing sheet 1S), the first base material 10 and the second base material 12 (first base material sheet 10S and second base material sheet 12S) are made of reinforcing fiber group 11A (reinforced). It functions as a mold for impregnating the fiber sheet 11AS) with the adhesive 11B, but retains the shape of the entire warpage prevention member 1 (warpage prevention sheet 1S) (because it does not deform even when lightly touched by a person). Also functions as a material. That is, the 1st base material 10 and the 2nd base material 12 (1st base material sheet 10S and 2nd base material sheet 12S) as a formwork can be left as a discard frame. Therefore, the manufacturing process of the warpage prevention member 1 (warpage prevention sheet 1S) is shortened, and the production efficiency of the warpage prevention member 1 (warpage prevention sheet 1S) can be improved.

  In the first embodiment, the second adhesive application step is performed after the second adhesive impregnation step, but the second adhesive application step is performed after the first adhesive application step, and then, You may perform a 1st adhesive agent impregnation process and a 2nd adhesive agent impregnation process. First, the first adhesive application step and the second adhesive application step may be performed together. In this case, the first base sheet 10S or the second base sheet 12S may be placed on the reinforcing fiber sheet 11AS first.

  The first adhesive application step, the first adhesive impregnation step, the second adhesive impregnation step, the second adhesive application step, and the sandwiching step constitute the first step of the present invention, and the compression step and the curing step are performed. This constitutes the second step of the present invention.

(Other embodiments)
Below, other embodiment of the curvature prevention member of this invention is described.

  In the first embodiment, the reinforcing fiber group 11A in the warp preventing members 1 and 2 is a PAN-based carbon fiber, but is not limited to this, and other carbon fibers such as a pitch-based carbon fiber or other fibers such as a glass fiber. Resin fibers can be used as appropriate. Furthermore, the reinforcing fiber group 11A is not configured by a single resin fiber, but may be configured by combining two or more types of resin fibers such as carbon fiber and glass fiber.

  Further, in the first embodiment, the reinforcing fiber group 11A is composed of only a plurality of carbon fibers along the axial direction of the vertical axis material D11 and the horizontal axis material D12 to be attached, but along this axial direction. In addition, a plurality of carbon fibers in another arrangement direction may be included in the reinforcing fiber group 11A, such as a plurality of carbon fibers and a plurality of carbon fibers whose fiber directions are orthogonal to the axial direction. By including a plurality of carbon fibers in other arrangement directions, it is possible to reinforce the perforation of the warp preventing members 1 and 2 by so-called “doubling”. Moreover, the curvature along the direction orthogonal to the axial direction of the vertical axis | shaft material D11 and the horizontal axis | shaft material D12 of the curvature prevention members 1 and 2 can be prevented.

  Further, in the first embodiment, the reinforcing fiber group 11A in which a plurality of carbon fibers are arranged has a substantially rectangular cross-sectional shape having a width L2a = 100 mm and a thickness t2 = 0.07 mm as a whole. The cross-sectional shape and dimensions of the reinforcing fiber group 11A, in other words, the total cross-sectional area of the carbon fibers constituting the reinforcing fiber group 11A (or the number of carbon fibers) is not limited to this, and design strength such as desired tensile strength and It can set suitably according to the impregnation efficiency of an adhesive agent.

  Further, for example, when a carbon fiber twice as large as the total cross-sectional area (number) of carbon fibers constituting the reinforcing fiber group 11A is necessary (when tensile strength twice as much as the reinforcing fiber group 11A is required), the reinforcing fiber is simply used. Instead of doubling the thickness of the group 11A, another warp preventing member 1 is adhered to the surface of the second base 12 of the warp preventing member 1 with an adhesive 11B, and the warp preventing member 1 is stacked in two stages. It can also be.

  Further, when a carbon fiber twice as large as the total cross-sectional area of the carbon fibers constituting the reinforcing fiber group 11A is required (when a tensile strength twice as high as the reinforcing fiber group 11A is required), for example, as shown in FIG. The warpage preventing member 3 can also be used. 6A is a perspective view of the warpage preventing member 3, FIG. 3B is a CC end view, and FIG. 6C is a DD end view. The warp preventing member 3 is further laminated on the warp preventing member 1 with a reinforcing material 13 made of the same carbon fiber reinforced plastic as the reinforcing material 11, and the reinforcing material 13 is made of the same single plate as the first base material 10. A third base material 14 is laminated. Specifically, in the state where the reinforcing fiber group 13A composed of the same plurality of carbon fibers as the reinforcing fiber group 11A is sandwiched between the second base material 12 (warp prevention member 1) and the third base material 14, the adhesive The reinforcing fiber group 13A is impregnated with an adhesive 13B made of the same woodworking adhesive as 11B, and the second base material 12 (warp prevention member 1), the reinforcing fiber group 13A, and the third base material 14 are bonded together. And are connected together.

  Here, as an example of the manufacturing method of the warpage preventing member 3, first, the first adhesive application step, the first adhesive impregnation step, the second adhesive impregnation step, the second adhesive application step, and the sandwiching are performed first. The warpage preventing sheet 1S is generated by performing the process. Next, similar to the first adhesive application step, the adhesive 13B is applied to the entire surface of the second base sheet 12S. Next, as in the first adhesive impregnation step, the same reinforcing fiber sheet 13AS as the reinforcing fiber sheet 11AS is placed on the surface of the applied second base sheet 12S, and the entire surface of the reinforcing fiber sheet 13AS is further placed. The reinforcing fiber sheet 13AS is impregnated with the adhesive 13B by being pushed by the adhesive application roller R. Next, similarly to the second adhesive impregnation step, the adhesive 13B is applied from the surface side of the reinforcing fiber sheet 13AS, and the reinforcing fiber sheet 13AS is reliably applied and impregnated with the adhesive application roller R. . Then, similar to the second adhesive application process, the adhesive 13B is applied to the entire surface of the third base sheet 14S made of the same single plate as the second base sheet 12S, and the bonding is performed in the same manner as the sandwiching process. The third base sheet 14S coated with the agent 13B is placed on the reinforcing fiber sheet 13AS. Thereafter, similarly to the manufacturing method of the warp preventing members 1 and 2, after a predetermined number of warp preventing sheets 3S are generated, the warping preventing member 3 is subjected to a compression step, a curing step, and a (miniaturization step) cutting step. Manufacturing. In addition, the manufacturing method of this curvature prevention member 3 is an example, Comprising: It does not restrict to this.

  In the warpage preventing member 3, the first base material 10, the second base material 12, and the third base material 14 are made of the same single plate, and the grain direction of the single plate is substantially parallel to the long side direction. , Any one of the first base material 10, the second base material 12, and the third base material 14 (for example, the second base material 12) or two (for example, the first base material 10 and the third base material). The material 14) can be made of a single plate whose grain direction is substantially parallel to the short side direction of the warpage preventing member 3. Thus, by including the single plate in the grain direction substantially parallel to the short side direction of the warp preventing member 3, it is possible to prevent the warp preventing member 3 from warping along the short side direction.

  In the first embodiment, the warp preventing member 1 and the warp preventing member 2 are different in the tensile strength because they are different in the width of the reinforcing fiber group 11A. And the warp prevention member 1 is affixed on the vertical axis | shaft material D11, and the warp prevention member 2 is affixed on the horizontal axis | shaft material D12. As described above, when the warp preventing member of the present invention is pasted to two or more places on one warp preventing object, warp preventing members having different tensile strengths can be pasted depending on the pasting location. A warpage preventing member having the same tensile strength can be attached regardless of the location.

  Moreover, in 1st Embodiment, although the curvature prevention member of this invention is affixed on the wooden door D and the curvature of the wooden door D is prevented, other woodens, such as a sliding door, a fence, a window frame, or a floor, It can also be used to prevent these warpages by attaching it to a joiner with a woodworking adhesive or the like. Furthermore, the warp preventing member of the present invention is used for wooden furniture such as table tops, chair seats and backs (such as headboards and backboards), bookshelves, TV boards, chests or cupboards, and wooden It is also possible to prevent these warpages by attaching them to members constituting the house such as beams, girders and pillars with an adhesive for woodworking. In this case, it is desirable to affix the warp preventing member to the warp preventing object so that the fiber direction of the fibers constituting the warp preventing member is parallel to the direction of warping to be prevented. Moreover, in 1st Embodiment, although the warpage prevention member of this invention is affixed on the vertical axis | shaft material D11 and the horizontal axis | shaft material D12 as the components in the manufacturing process of the wooden door D as a product, When parts such as the material D11 and the horizontal shaft material D12 are shipped as one product, they may already be attached.

  In the first embodiment, the first base material 10 and the second base material 12 have the same thickness. For example, the first base material 10 is thicker than the second base material 12. The thicknesses of the first base material 10 and the second base material 12 can be different. In addition, the thicknesses of the first base material 10, the second base material 12, and the third base material 14 in the warpage preventing member 3 are all the same, or any two of them are the same. It may be different. Further, although the thickness of the reinforcing material 11 and the thickness of the reinforcing material 13 are the same, the thickness of the reinforcing material 11 and the reinforcing material 13 is, for example, greater than the thickness of the reinforcing material 13. It can be different.

  In the first embodiment, the material of the first base material 10 and the second base material 12 is cedar, but other wood such as beech and spruce (imported material) may be used. Furthermore, the wood type of one of the first base material 10 and the second base material 12 may be different from the type of the other wood. In addition, either or both of the first base material 10 and the second base material 12 can be made of another material (for example, plastic or paper) different from wood. In this case, the types of the adhesive constituting the adhesive 11B are the first base 10 and the second base in order to prevent a decrease in the adhesive strength between the first base 10, the reinforcing fiber group 11A, and the second base 12. It can be appropriately set according to the material of the material 12. For example, when the first base material 10 and the second base material 12 are made of plastic, the adhesive 11B is a plastic base material 10 and a second base material 12 such as an adhesive for plastic. It is desirable to use an adhesive having a strong adhesive force (suitable for bonding the first base material 10 and the second base material 12 made of plastic). Similarly, the warpage preventing member 3 may be any one of the first base material 10, the second base material 12, and the third base material 14, or any one wood type. In addition, any of the first base material 10, the second base material 12, and the third base material 14, or any one or two of the materials, is made of another material different from wood (for example, plastic or paper). You can also. In this case, the types of the adhesive constituting the adhesive 11B and the adhesive 13B may be the same or different.

  The warpage preventing member of the present invention is not limited to wooden furniture and joinery, but also furniture and joinery made of other materials such as plastic and paper, and various other products such as automobiles and bicycles. Can be used. For example, if the object of warpage prevention by the warp preventing member of the present invention is made of plastic, the first base material 10 made of plastic can be used, and if made of paper, the first base material 10 made of paper can be used. can do. In addition, even if the object of warpage prevention by the warp preventing member of the present invention is made of plastic or paper, the first substrate 10 made of wood can be used.

  Further, the shape and size of the cross section of the warp preventing members 1, 2, and 3 and the shape and size in plan view are not limited to the above examples, and can be set as appropriate. In addition, the cross-sectional shape and dimensions of the first base material 10, the reinforcing material 11, the second base material 12, the reinforcing material 13, and the third base material 14 are not limited to the above examples, and are appropriately Can be set. Furthermore, the configuration of the warp preventing members 1, 2, and 3 is not limited to the above-described example, and can be set as appropriate. Moreover, it is desirable that the warpage preventing member of the present invention is thin and lightweight as a whole and has flexibility.

  Moreover, although the adhesive for woodworking is used as the adhesive agent 11B of the warp preventing members 1 and 2, a two-component adhesive agent such as an epoxy resin can also be used. In this case, most of the surface of the adhesive 11B is covered with the first base material 10 and the second base material 12, and the contact surface of the adhesive 11B with the air is limited, so that the adhesive 11B is cured. Time can be shortened.

  In the first embodiment, in the compression process and the curing process, a predetermined number of warp prevention sheets 1S are compressed in a normal indoor environment, and then a predetermined number of warp prevention sheets 1S in a compressed state are compressed in the normal indoor environment. Although it is cured, instead of the compression step and the curing step, a predetermined number of warp prevention sheets 1S may be compressed and cured while being evacuated. Thereby, the air contained in the adhesive 11B can be reduced, and the deterioration of the quality of the warpage prevention sheet 1S (warpage prevention member 1) can be prevented.

1, 2 and 3 ... Warpage prevention member 1S, 3S ... Warpage prevention sheet 10 ... First base material 10S ... First base material sheet 11 ... Reinforcement material 11A ... Reinforcement fiber group 11AS ... Reinforcement fiber sheet 11B ... Adhesive 12 ... First 2 base material 12S ... 2nd base material sheet 13 ... reinforcing material 13A ... reinforcing fiber group 13AS ... reinforcing fiber sheet 13B ... adhesive 14 ... 3rd base material 14S ... 3rd base material sheet D ... wooden door D1 ... core material D11 ... vertical axis material D12 ... horizontal axis material D2 ... face material

Claims (4)

A sheet-like warpage prevention member that is bonded to the surface of a member or product that may be warped,
A first substrate having adhesiveness to the surface of the member or product;
Reinforced fiber group laminated on the first base material, and a plurality of reinforcing fibers arranged in the same or substantially the same direction and exhibiting a flat shape as a whole,
A second base material laminated on the reinforcing fiber group,
The reinforcing fiber group is impregnated with an adhesive, and the first base material, the second base material, and the reinforcing fiber group are integrally bonded by the adhesive ,
The warp preventing member, wherein the first base material and the second base material are made of wood . In the warpage prevention member according to claim 1 ,
The warp preventing member, wherein the plurality of reinforcing fibers constituting the reinforcing fiber group are made of carbon fibers. In the warpage prevention member according to claim 2 ,
A warpage preventing member, wherein a fiber direction of the carbon fiber and a grain of wood constituting the first base material and the second base material are substantially parallel. A method for producing a warpage-preventing member that is bonded to the surface of a member or product that may be warped,
A plurality of reinforcing fibers are arranged in the same or substantially the same direction and impregnated with an adhesive to a reinforcing fiber group that is flat as a whole, and the reinforcing fiber group is possess adhesion to the surface of the product, a first step of sandwiching between the first substrate and the second substrate made of wood,
While applying a compressive load in the direction in which the reinforcing fiber group is sandwiched from the surface side of the first base material and the second base material, the adhesive is cured, and the first base material and the second base material And a second step of integrally bonding the base material and the reinforcing fiber group together.

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