JP2000225648A - Fiber-reinforced connecting member and method of manufacturing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fiber-reinforced connecting member characterized in that a center of a previously continuous fiber strand bundle is a cured product of a fiber-reinforced composite material, and both ends are fibers not impregnated with resin. In addition, at the time of reinforcing the fiber sheet through the wall, the resin-unimpregnated fiber portions at both ends are simultaneously formed, and the fiber-reinforced connecting member can be easily formed without a decrease in strength. SOLUTION: A method for manufacturing a fiber-reinforced connecting member, characterized in that a matrix resin material is impregnated only in the center in the fiber direction of a sheet in which continuous fiber strands are arranged in one direction, and is wound up to a required thickness. A fiber-reinforced connecting member, wherein the center of the fiber strand bundle is a cured product of a fiber-reinforced composite material, and both ends are fibers not impregnated with a resin. [Effect] It is possible to make a small hole in a wall, pass a connecting member through the hole, and attach an end of the connecting member to a reinforcing sheet.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the field of building materials and sheet reinforcement in which the demand for light weight, high strength and high elasticity is increasing, such as columns with sleeve walls, columns with waist walls and columns with hanging walls. The present invention relates to a fiber-reinforced connecting member effective for exhibiting a fiber reinforcing effect through a sleeve wall, a waist wall, and the like of a pillar, and a method of manufacturing the same.

[0002]

2. Description of the Related Art In recent years, as a measure for repairing and reinforcing extremely strong vibrations and impacts such as earthquakes, reinforcing piers and columns of structures such as bridges and elevated roads with fiber-reinforced composite materials has been increasing. This is because it has been recognized in the world that fiber-reinforced composite materials are very strong in terms of strength, lightweight, and easy to carry out reinforcement work.

As means for reinforcing a member to be reinforced such as a pier or a pillar of a structure by using such a fiber reinforced composite material, a cured fiber reinforced composite material is directly adhered to a member to be reinforced with an appropriate adhesive and reinforced. And a prepreg, which is a molding material (precursor) of a fiber-reinforced composite material, is attached to a member to be reinforced and thermoset. Above all, a room-temperature-curable matrix resin is impregnated into the reinforcing fibers of a one-way aligned reinforcing fiber sheet provided with reinforcing fibers arranged in one direction on a support sheet, and the fiber sheet is attached to a member to be reinforced. Thereafter, a technique for curing the matrix resin (JP-A-3-224901) is used in the field of sheet reinforcement.

[0004] However, the method described in the above publication is
When reinforcing the inside of an independent pillar or tunnel, the fiber sheet can be completely (continuously) wound around the independent pillar or tunnel as a member to be reinforced, so that the fiber reinforcing effect can be effectively exhibited. In the case of reinforcing columns with single-sleeve walls having walls or the like, the fiber sheet cannot be completely (continuously) wound around these columns, so that the reinforcing effect has been weakened.

[0005]

However, in order to reinforce a column with a one-sided wall having a wall or the like in the middle, a large hole is made in such a wall, and the fiber sheet is completely (continuously).
Attempts have been made to wrap it, but it is not effective to reinforce and weaken the wall body extremely. Therefore, FIG.
As shown in the figure, small holes (about 20 mm in diameter) are made at regular intervals in the column of the wall with the wall, and several tens to several hundreds of fiber threads (such as fiber strands) such as carbon fibers are formed in the holes. Pass the bundled fiber reinforced connecting member, spread both ends (bunches) of the connecting member in a fan shape, and attach it to a fiber sheet (reinforcement sheet) stretched on both sides of the pillar sandwiching the wall with epoxy resin etc. (adhesion・ Fixing method (Japanese Patent Application No. 9-25119)
No. 3, Japanese Patent Application No. 9-251195) has been proposed.
Thereby, the end of the fiber sheet can be fixed to a pillar or a wall.

[0006] As proposed above, a fiber-reinforced connecting member is simply inserted into a small hole while leaving the fiber strand bundle as it is, and then a resin-impregnated fiber strand bundle is impregnated. The method of passing uncured through the hole has a large negative effect in terms of securing resin impregnation into the fiber strand (fiber strand bundle) in the small hole, securing the tension of the fiber strand (fiber strand bundle), and preventing damage. The factor occurs. That is, since the fiber strand bundle of the portion installed in the small hole portion of the wall does not develop strength after construction unless it is impregnated with resin and cured, as in the method proposed above, the fiber strand bundle remains in the hole as it is. When the fiber strand bundle is passed through the hole, the fibers constituting each fiber strand are so thin that the fiber strands are twisted, so that the fiber strands do not get inside easily and must be forced (pressed in). As a result, the fibers are rubbed in the hole (the fibers are weak when pressed laterally), and the fibers are damaged, and the resin does not easily enter, so that it is impossible to secure the impregnation property or the tension. Further, in the method of impregnating and passing a resin through a fiber strand bundle, impregnating and passing the resin in situ has problems such as deterioration of the resin and sagging if it is not cured, and it is also very difficult to control the resin.
In addition, it is very difficult to wind a tape or the like tightly around a fiber strand bundle impregnated with a resin, and it is very difficult to remove the tape or the like in the hole in the wall. is not.

Accordingly, an object of the present invention is to reinforce a column with a single-sleeve wall or the like which cannot be completely (continuously) wound with a fiber sheet (reinforcing sheet) due to a wall or the like in the middle.
Pass through the hole made in the wall without extremely weakening the strength of the wall body, and stick both ends (bunches) to the fiber sheet (reinforcement sheet) stretched on both sides of the pillar (spreading in a fan shape) on both sides of the pillar (Adhesion / fixation), the fiber reinforced connecting member (that is, Japanese Patent Application No. 9-251193, Japanese Patent Application No. No. 9-251195), to ensure the impregnation of the matrix material (resin) of the connecting member in a hole formed in the wall, the securing of the tension of the connecting member, and the prevention of damage. It is intended to provide a fiber-reinforced connecting member which is excellent in terms of surface and a method for manufacturing the same.

[0008] In addition, there is a possibility that the fiber-reinforced connecting member may be bent at the boundary between a wall and a pillar sandwiching the wall during the construction, depending on the construction. In such a case, the bent portion causes stress concentration and significantly lowers the fiber strength. Therefore, another object of the present invention, in addition to the above objects,
An object of the present invention is to provide a fiber-reinforced connecting member having a structure that does not significantly reduce the strength reduction even in the bent portion, and a method for manufacturing the same.

[0009]

The objects of the present invention are as follows: (1) A fiber-reinforced joint, wherein a central portion of a continuous fiber strand bundle is formed into a fiber-reinforced composite material by a matrix material. This is achieved by members.

[0010] Another object of the present invention is to provide: (2) a fiber reinforced composite material having a central portion formed of a fiber reinforced composite material with a hard matrix material; And a portion formed into a fiber-reinforced composite material by a material, which is achieved by the fiber-reinforced connecting member according to the above (1).

Further, another object of the present invention is to provide (3) a method in which continuous fiber strands are arranged in a sheet in one direction, and a central portion of the fiber strands arranged in the sheet is impregnated with a matrix material to form a sheet. The sheet material is wound into a continuous fiber strand bundle having the matrix material, and the matrix material of the fiber strand bundle is cured to form a fiber-reinforced composite material at the center of the fiber strand bundle. This is achieved by the method for manufacturing a fiber-reinforced connecting member described above.

Another object of the present invention is to provide (4) a step of impregnating the central portion of the fiber strand with a matrix material to form a sheet, wherein the matrix material is attached to the central portion of the sheet-like fiber strand. Thereafter, the central portion is subjected to a heat treatment under pressure, which is also achieved by the method for producing a fiber-reinforced linking member according to the above (3).

Further, another object of the present invention is to provide (5) a method in which, when the matrix material is cured, a detachable form holder is provided around the center of the fiber strand bundle. This is also achieved by the method for producing a fiber-reinforced connecting member according to 3) or 4).

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail.

The fiber-reinforced connecting member of the present invention is characterized in that a central portion of a continuous fiber strand bundle is formed into a fiber-reinforced composite material by a matrix material. More specifically, in the continuous fiber strand bundle, the central portion is formed into a fiber-reinforced composite material by a matrix material (that is, a cured product of the fiber-reinforced composite material obtained by curing the matrix material), and both ends are formed by a matrix material. The material is a virgin / unimpregnated fiber (that is, it remains in a fiber strand bundle).
As a result, there is a walled pillar (a pillar with a sleeve wall, a pillar with a waist wall, a pillar with a hanging wall, etc.) that cannot be completely (continuously) wound with a fiber sheet (reinforcement sheet) in the middle. 5) (similar in appearance to the prior application), as shown in FIG. 5, a small space at regular intervals near the pillar 59 of the wall 55 without substantially weakening the strength of the wall 55 body. A central portion (not shown in FIG. 5, not shown in FIG. 4) made of a fiber-reinforced composite material is inserted into the hole 57, and the tufts of the both end portions 53 as the fiber strand bundle are spread in a fan shape to sandwich the wall 55. Pillar 59
By attaching (adhering and fixing) a suitable matrix material (for example, epoxy resin material) to a fiber sheet 61 (reinforcement sheet) stretched on both sides of the fiber sheet 61, the end portion 63 of the fiber sheet 61
Can be fixed to the pillar 59 so as to have a sufficient reinforcing strength. Further, the connecting member in the hole drilled in the wall,
Since the fiber reinforced composite material is used before construction, the impregnating property of the matrix material can be sufficiently secured, and since the strength is integrated with the matrix material, sufficient tension can be secured. Since it appears, it is also excellent in terms of damage prevention.

The type of fiber used in the continuous fiber strand (hereinafter, also simply referred to as reinforcing fiber) in the present invention is a property (seismic strength) required by combination with a matrix material (formation of fiber reinforced composite material). , Rigidity, etc.), specifically, inorganic fibers such as carbon fibers, organic fibers such as aramid fibers,
Any of non-metallic fibers such as glass fiber, metal fiber, and sialon fiber may be used, and these may be used alone or in combination of two or more. In particular, a sheet reinforcing material (for example, a fiber-reinforced composite material such as a carbon fiber sheet) attached to both sides of a pillar sandwiching a wall, and a fiber-reinforced connecting member of the present invention integrated and fixed with the sheet reinforcing material. Considering the elongation of the sheet, it is more preferable to use the same type of fiber as the carbon fiber or the like constituting the reinforcing fiber used for the sheet reinforcing material.

The length of the fiber strand varies depending on the dimensions of the column to be reinforced, the number of sheet reinforcing materials to be wound, the interval between holes, and the like, and cannot be uniquely defined. The length should be determined as appropriate according to the length, but as for the length, "the length corresponding to the thickness of the wall on which the hole is to be made (the length may be determined by the size of each wall) +50"
~ 300mm (the length of the end to be attached to the fiber sheet) x 2 ", the same characteristics as the case where the sheet reinforcing material is completely wound around independent columns etc. (seismic strength , Rigidity, etc.).

Similarly, the number of the fiber strands constituting the fiber strand bundle of the present invention also varies depending on the strength characteristics of the fibers (and the fiber strands), the dimensions of the columns to be reinforced, the number of sheet reinforcing materials to be wound, the intervals between holes, and the like. It cannot be unambiguously defined and should be appropriately determined according to individual cases. Usually, considering the hole in the wall, etc., the thickness of the central part of the connecting member is 5-30 mm in diameter.
Is desirable. When the thickness of the central part of the connecting member is less than 5 mm in diameter, the strength is weak and many holes need to be made. When the thickness of the central part of the connecting member exceeds 30 mm in diameter, Strength decreases.

Further, the term "continuous" means that each fiber strand constituting the fiber strand bundle is a single continuous linear material (reinforced fiber). It is specified for the purpose. The term “fiber strand” refers to a bundle (= fiber bundle) of fibers (filaments) in which a plurality of fibers are bundled together or not.

The matrix material used in the present invention includes (1) a hard matrix material (used at a portion to be inserted into a hole formed in a wall, and impregnated into the fiber strand bundle to improve the strength. And (2) a flexible matrix material (used when bent at the boundary between walls and pillars sandwiching the wall), and is used at the bent portion to impregnate the fiber strand bundle to impart flexibility. Stress concentration is reduced and strength is improved). Among these, as the hard matrix material of the above (1), a conventionally known matrix resin material used for fiber-reinforced composite material (the resin mentioned here includes rubber and elastomer, and the matrix resin material includes a catalyst , Accelerators,
Various additives known in the art, such as a reaction initiator such as a curing agent, and suitable auxiliary materials may be included), and the like can be widely used. It is preferable to use a resin material.
Further, as the soft matrix material of the above (2),
A flexible matrix resin material (herein, the resin includes rubber and elastomer, and the matrix resin material includes various conventionally known additives such as a catalyst, an accelerator, a reaction initiator such as a curing agent, and an appropriate And the like), which can be widely applied, but at least one selected from the group consisting of a silicone resin material, a rubber material, and a urethane resin material which are generally excellent in flexibility. It is preferred to use one.

Further, it is desirable that the amount of the matrix material with respect to the reinforcing fibers in the central portion of the fiber-reinforced composite material is adjusted so that the fiber content is 40 to 70% by volume. If the fiber content is less than 40% by volume, the diameter of the central part of the fiber reinforced connecting member for obtaining the required strength becomes large, the hole made in the wall etc. becomes large, and the decrease in the strength of the wall body is minimized. The effect peculiar to the present invention that it can be performed is reduced. When the fiber content exceeds 70% by volume, the strength for restraining between the reinforcing fibers is weakened, and the strength at the center of the fiber-reinforced connecting member is reduced. Here, the term “fiber-reinforced composite material” is used in such a manner that the entire fiber-reinforced connecting member is not a fiber-reinforced composite material, and only a part thereof is processed from a fiber strand (reinforced fiber) to a fiber-reinforced composite material. Since the state changed, it was made into a fiber-reinforced composite material.

As described above, in the fiber-reinforced connecting member, the central portion of the continuous fiber strand bundle is formed by a matrix material into a fiber-reinforced composite material.
It is desirable that the configuration of the central portion made of the fiber-reinforced composite material be appropriately changed depending on how to attach the wall of the walled column to be reinforced. For example, in the case of a column with a wall as shown in FIG. 6, it is only necessary to form a fiber-reinforced composite material with a hard matrix material in accordance with the thickness of the wall. In the case of a column with a wall as shown in FIG. Is provided with a portion made of a fiber-reinforced composite material with a hard matrix material in accordance with the thickness of the wall (simply called a hard portion), and only one side of the boundary between the wall and the column sandwiching the wall is bent. Because of the necessity, it is desirable to provide a portion (also simply referred to as a soft portion) made of a fiber-reinforced composite material with a soft matrix material adjacent to the hard portion only on the bent side. In the case of a pillar with a wall as shown in (1), it is desirable to provide a hard portion in accordance with the thickness of the wall, and to provide a soft portion in a bent portion on both sides so as to be adjacent to the hard portion.

Next, in the method for producing a fiber-reinforced connecting member according to the present invention, a continuous fiber strand is arranged in a sheet in one direction, and a central portion of the fiber strand arranged in the sheet is impregnated with a matrix material. To form a continuous fiber strand bundle having the matrix material by winding the sheet material, and curing the matrix material of the fiber strand bundle to form a fiber-reinforced composite material at the center of the fiber strand bundle. It is characterized by doing. However, the method for producing the fiber-reinforced connecting member according to the present invention is not particularly limited, and can be produced by appropriately combining conventionally known production techniques for fiber-reinforced composite materials. Therefore, the following description using drawings is one of the specific embodiments.

That is, as one embodiment of the method of manufacturing the fiber-reinforced connecting member of the present invention, first, a coated paper in which a hard matrix resin material is applied to the center of one side of the release paper according to the thickness of the wall. Prepare Next, as shown in FIG.
Continuous fiber strands (reinforced fibers) having the same length are uniformly arranged in a sheet shape at equal intervals in one direction such that the central portion thereof corresponds to the application portion of the matrix resin material on the application paper. A coated paper on which a hard matrix resin material has been similarly coated is placed thereon. As a result, as shown in FIG. 1, the matrix resin material impregnated portion 11 is formed at the central portion, and the fiber portions 12 without the matrix resin material are formed at both ends of the matrix resin material impregnated portion 11. In this state, the matrix fibers are impregnated with the reinforcing fibers by a pressurizing and heating means such as a roll. At this time, the amount of the matrix resin material with respect to the reinforcing fibers is adjusted so that the fiber content at the central portion of the fiber reinforced composite material at the time of final curing is 40 to 70% by volume. . 40% fiber content
If it is less than the required diameter, the diameter of the central portion for providing the required strength becomes large, the hole formed in the wall or the like becomes large, and the effects specific to the present invention are reduced. If the fiber content exceeds 70% by volume, the strength for restraining the reinforcing fibers is weakened, and the strength at the center of the fiber-reinforced composite material is reduced.
The impregnating conditions such as heating temperature, pressure, and application time at this time are set so that the purpose of impregnating the matrix fibers with the matrix resin material is achieved. It should be appropriately determined depending on the diameter, the type of the matrix material, the amount used, and the like, and is not uniquely defined. In particular, the heating during the preparation of the sheet-like material is performed to temporarily increase the fluidity of the low-fluidity matrix resin material, and to efficiently enter (penetrate) into each fiber strand (fiber bundle). (It can be said that it is making a kind of prepreg). Therefore, it is necessary to heat the matrix resin material at a relatively low temperature at which the matrix resin material does not cure. On the other hand, the use of a matrix resin material having low fluidity is advantageous because the obtained sheet-like material can be rolled neatly (with a circular cross section) when the obtained sheet material is rolled, and the matrix resin material flows during curing. is there.

Next, the sheet-like material in which the matrix resin material is impregnated into the reinforcing fibers is adjusted to a required strength and the winding amount is determined, and the release paper attached to the upper and lower sides of the sheet-like material is removed. As shown in FIG. 2, rounding is performed around an axis perpendicular to the longitudinal direction of the matrix resin material impregnated portion 21 (see FIG. 1; an axis parallel to the fiber direction 13 of the reinforcing fibers) until a predetermined winding length is reached. To form a continuous fiber strand bundle having the matrix resin material (see FIG. 2). When a predetermined winding length is reached, a release tape is wound thereon, and then a heat-shrinkable tape is wound around only the central portion of the matrix resin material impregnated (matrix resin material impregnated portion 21) (at both ends). These tapes may or may not be wound on the squeezed fiber portion 23 where the fiber portion 22 without the matrix resin material is wound). Heating is performed to completely cure the matrix resin material of the fiber strand bundle, and the central portion of the fiber strand bundle is converted into a fiber-reinforced composite material (FIG. 4).
(See FIG. 4), it is possible to manufacture a fiber-reinforced connecting member having high strength (see FIG. 4).

In the manufacturing method of the present invention, as described above, when the thermosetting matrix resin material is cured, the detachable form holder is provided around the center of the fiber strand bundle. Is desirable. The detachable form holder includes, for example, a combination of a release tape and a heat-shrinkable tape (heat-shrinkable tube) as described above, but is not limited thereto. Here, the use of the release tape prevents the heat-shrinkable tape from sticking to the connecting member by heating in the curing furnace,
The heat-shrinkable tape is used to make it detachable. The heat-shrinkable tape is used without any special resin or mold. The tape shrinks by applying heat, and the heat-shrinkable tape has a uniform and clean shape (joint member). It is because it can manufacture. By doing so, it is easier to pass through the hole made in the wall.

As another embodiment of the method of manufacturing the fiber-reinforced connecting member according to the present invention, as shown in FIG. A hard matrix resin material is applied according to the thickness of the wall (hard matrix resin material impregnated portion 31), and a portion of the hard matrix resin material that is bent at both ends at the boundary between the wall and the column sandwiching the wall is formed. Using a coated paper formed by applying a flexible matrix resin material (preferably, a resin material of silicone resin, rubber, and urethane resin) having flexibility according to the length (the soft matrix resin material impregnated portion 33), If it is manufactured in the same manner as in the above manufacturing method, a fiber-reinforced connecting member (see FIG. 4) having high strength can be manufactured by alleviating stress concentration even in a bent portion.

When the fiber-reinforced connecting member of the present invention is applied to a column or the like on which a reinforcing sheet cannot be wound all around by a wall or the like, a small hole (approximately several mm in diameter of the connecting member to be used) is appropriately formed in the wall in advance. Leave at intervals (intervals determined by the strength of the reinforcing sheet and the connecting member)
When the reinforcing sheet is wound around a pillar, the fiber reinforced connecting member is passed through the hole so that the central portion is in the hole at the same time,
A matrix material (for example, epoxy resin material) is applied to the tufts at both ends of the fiber strand bundle without the matrix material, spread in a fan shape, and pasted on a reinforcing sheet wound on both sides of the pillar sandwiching the wall, By simultaneously setting and curing the reinforcing sheet, the reinforcing sheet and the fiber-reinforced connecting member can be integrally fixed to the pillar with the wall.

[0029]

The present invention will be described more specifically below with reference to examples.

Example 1 ^Two sheets of a release sheet having a width of 500 mm and a length of 1100 mm were prepared by applying an epoxy resin material having a basis weight of 45 g / m ^{2 to} the center 500 mm in the longitudinal direction. PA fixed to a fixed length on the epoxy resin material coated surface of one release sheet
One hundred N-type carbon fibers T700S-12K (a continuous fiber strand in which 12,000 T700PAN-based carbon fibers were bundled) were arranged vertically at a pitch of 5 mm in the sheet width direction such that the center part was located. A release sheet on which the other epoxy resin material was applied was placed on the arranged ones. The sheet-like material thus superimposed is placed on a roll having a release sheet thickness × 2 + 0.16 mm and a roll heating temperature of 8 mm.
The carbon fiber was impregnated with the epoxy resin material by being sandwiched between heating rolls adjusted to 0 ° C. and pressed.

After peeling off the release sheets on both sides of the obtained sheet, the sheet is rolled in the width direction and wound (see FIG. 2). A continuous fiber strand bundle impregnated with the resin material (fiber-reinforced connecting member precursor) was obtained. Wrap a release tape only in the area where the precursor epoxy resin material is impregnated,
After wrapping a heat shrink tape thereon, the precursor was placed in a curing furnace and cured at 120 ° C. for 1 hour. After cooling to room temperature, the tapes were removed, and the center part of the fiber-reinforced composite material made of epoxy resin material had a length of 500.
mm, the diameter is 10.2 mm, and the reinforcing fiber content (volume%) of the central portion; Vf is 54%, and both ends of the carbon fiber strand bundle without the epoxy resin material are each 300 mm in length. A fiber reinforced tie member was created.

[0032]

According to the fiber-reinforced connecting member of the present invention, the central portion of the continuous fiber strand bundle is formed into a fiber-reinforced composite material by a matrix material. The central part to be formed is composed of a part formed of a fiber-reinforced composite material by a hard matrix material and a part formed of a fiber-reinforced composite material by a soft matrix material. Therefore, in the fiber-reinforced reinforcing sheet construction method in which the entire periphery cannot be completely and continuously wound by a wall or the like, the above object of the present invention can be sufficiently achieved. Minimizing the decrease in strength by minimizing it, it is also possible to suppress the significant decrease in strength of the wall body, and since it is made of fiber reinforced composite material and the strength is increased, The work of inserting the connecting member into the hole can also be performed very easily (that is, in the case of a continuous long fiber bundle which is easy to separate and spread without a core portion as in the prior application) It is easy to receive big damage when inserting into a small hole, and even if all the parts passed through the hole can be wrapped with protective tape etc., it will be troublesome and time-consuming, and in the center part which will enter the hole It was not possible to wrap a protective tape etc. to impregnate the resin later, and it was not possible to avoid damage to this part, but in the present invention, the central part was previously made into a composite material, Of the ends that are easy to separate and spread easily, only the end on the side to be inserted (short distance is enough) is wrapped with a kind of protective tape in advance so that it can be inserted smoothly, and after insertion The te Since it by removing the flop), it is possible to improve the workability of the method dramatically.

[Brief description of the drawings]

FIG. 1 prepares a coated paper in which a hard matrix resin material is applied to the center of one side of a release paper according to the thickness of a wall,
Continuous fiber strands (reinforcement fibers) of the same length are uniformly arranged in a sheet at equal intervals in one direction such that the center of the fiber strands corresponds to the application portion of the matrix resin material on the application paper. Similarly, the coated paper coated with the hard matrix resin material was overlapped, so to say, the matrix resin material impregnated portion was formed at the center portion, and the fiber portions without the matrix resin material were formed at both ends of the matrix resin material impregnated portion. It is a manufacturing process schematic diagram showing a state.

FIG. 2 impregnates the reinforcing fibers into the matrix resin material by pressurizing and heating means such as roll heating in the state of superposition shown in FIG. 1, and forms a sheet material in which the matrix resin material is impregnated into the reinforcing fibers. , Determine the amount of winding according to the required strength,
After removing the release papers attached to the upper and lower sides of the sheet-like material, centering on an axis perpendicular to the longitudinal direction of the matrix resin material impregnated portion (the axis parallel to the fiber direction of the reinforcing fibers (see FIG. 1)), It is a manufacturing process schematic diagram which shows a state in the middle of rounding and winding down to a predetermined winding length.

FIG. 3 shows a method of applying a hard matrix resin material (hard matrix resin material impregnated portion) to the center of one side of a release paper according to the thickness of a wall, according to the form of a pillar with a wall to be used. A flexible matrix resin material is applied to both ends of a flexible matrix resin material at the boundary between the wall and the column sandwiching the wall so as to match the length of the portion to be bent (soft matrix resin material impregnated portion). Prepare coated paper, and prepare continuous fiber strands (reinforced fibers) of the same length,
A uniform matrix is arranged in one direction in a sheet so that the center part of the matrix resin material is coated on the coated paper, and a hard matrix resin material and a soft matrix resin are similarly coated thereon. The hard matrix resin material impregnated part is at the center, the soft matrix resin material impregnated part is at both ends thereof, and the fiber part without matrix resin material is at both ends of the soft matrix resin material impregnated part. It is a manufacturing process schematic diagram which shows the state formed.

FIG. 4 Wraps and squeezes as shown in FIG. 2 to form a continuous fiber strand bundle having the matrix resin material, and when a predetermined winding length is reached, a release tape is wound thereon, and then After winding the heat-shrinkable tape only around the central portion impregnated with the matrix resin material (the matrix resin material-impregnated portion), put it in a curing furnace and heat it under appropriate heating conditions to obtain the matrix resin of the fiber strand bundle. FIG. 6 is a schematic diagram showing a state in which a fiber-reinforced connecting member of the present invention having high strength is produced (completed) by completely curing the material and forming the central portion of the fiber strand bundle into a fiber-reinforced composite material. is there.

FIG. 5 is a single-walled pillar that cannot be completely (continuously) wound with a fiber sheet (reinforcement sheet) using a fiber-reinforced connecting member according to the present invention or the prior application and having a wall or the like in the middle thereof. It is a schematic diagram showing the situation of construction at the time of reinforcing.

FIG. 6 shows a fiber-reinforced connecting member of the present invention having a hard matrix resin material impregnated portion 51 formed into a fiber-reinforced composite material with a hard matrix material at the center in accordance with the thickness of the wall. It is a schematic diagram of a section showing a situation of construction at the time of reinforcing a column with one wall which cannot complete (continuously) wind a fiber sheet (reinforcement sheet).

FIG. 7 shows a portion (simply referred to as a hard portion; hard matrix resin material impregnated portion 51) formed of a fiber-reinforced composite material with a hard matrix material according to the thickness of the wall, and sandwiches the wall. Since it is necessary to bend only one side of the boundary with the pillar, only the bent side is made of a fiber-reinforced composite material made of a soft matrix material so as to be adjacent to the hard part (hereinafter, simply referred to as a soft part). A fiber sheet (reinforcement sheet) cannot be completely (continuously) wound using a fiber-reinforced connecting member of the present invention provided with a soft matrix resin material impregnated portion 53) and having a wall or the like in the middle thereof. It is a schematic diagram of a section showing a situation of construction at the time of reinforcing such a column with one wall.

FIG. 8 provides a hard portion (hard matrix resin material impregnated portion 51) in accordance with the thickness of the wall, and a soft portion (soft matrix resin material impregnated portion 53) in a bent portion on both sides so as to be adjacent to the hard portion. For reinforcing a column with a single wall that has a wall or the like and cannot completely (continuously) wind a fiber sheet (reinforcing sheet) by using the fiber-reinforced connecting member of the present invention. It is the schematic of the cross section showing the situation.

[Explanation of symbols]

11, 21, 31, 41, 51: Hard matrix resin material impregnated portion, 12, 22, 32, 42, 52: Fiber portion without matrix resin material, 13: Fiber direction, 23: Stretched fiber portion, 33, 53 ... soft matrix resin material impregnated part, 52 ... both ends of the fiber reinforced connecting member (the bunches at both ends are fan-shaped), 55 ... the wall of a column with one wall, 57 ... at regular intervals near the column of the wall Drilled small holes, 59 ... pillars with one wall, 61 ... fiber sheet.

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 4F205 AA39 AD16 AH47 AH48 HA08 HA29 HA33 HA37 HA43 HB02 HC02 HC17 HF01 HF23 HF24 HK02 HK03 HK04 HK05 HL17 HL25 HM04 HM06

Claims (4)

[Claims] 1. The central part of a continuous fiber strand bundle,
A fiber-reinforced connecting member characterized by being made into a fiber-reinforced composite material by a matrix material. 2. A part formed by a fiber reinforced composite material with a hard matrix material and a part formed by a soft matrix material with a fiber reinforced composite material. The fiber reinforced connecting member according to claim 1, wherein the connecting member is constituted by: 3. A continuous fiber strand is arranged in a sheet in one direction, and a central portion of the fiber strand arranged in the sheet is impregnated with a matrix material to form a sheet. The sheet is wound and the matrix is wound. A method of manufacturing a fiber-reinforced connecting member, comprising: forming a continuous fiber strand bundle having a material; and curing a matrix material of the fiber strand bundle to form a fiber-reinforced composite material at a central portion of the fiber strand bundle. 4. The fiber-reinforced splicing member according to claim 3, wherein a removable shape holder is provided around the center of the fiber strand bundle when the matrix material is cured. Method.