JP2000015727A - Reinforcing fiber sheet and its production - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make a reinforcing sheet easy to handle by preventing the fray of reinforcing fibers and to obtain good workability and sufficient reinforcing effect when the reinforcing fiber sheet is used in a concrete structure or a molded product. SOLUTION: A reinforcing fiber sheet has a fiber layer 1 formed into a strip-like shape by arranging reinforcing fibers longitudinally and the backing members 3, 4 provided on both upper and rear surfaces of the fiber layer 1 and the backing members 3, 4 have protruding parts 3a, 3b, 4a, 4b protruded on both sides in the lateral direction of the fiber layer 1 and both backing members 3, 4 are bonded by these protruding parts. A holding means for continuously running reinforcing fibers in a strip-like state and for holding a restraint material is provided, and the restraint material held by the holding means is bonded to reinforcing fibers during running in the direction traversing the fibers.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reinforcing fiber sheet used to increase the strength of a concrete structure such as a bridge pier or a bridge girder, or to increase the strength of a molded product.

[0002]

2. Description of the Related Art As the above-mentioned reinforcing fiber sheet, for example, a carbon sheet in which carbon fibers are aligned in the longitudinal direction to form a strip is known. This carbon sheet does not woven carbon fibers, but only aligns them in the same direction for the following reasons. If we weave this carbon fiber, each fiber will undulate like a wave. However, the undulation of carbon fiber causes its tensile strength to decrease. Therefore, when used as a reinforcing fiber sheet, they are arranged straight in the same direction without intentionally weaving them.

However, if the carbon fibers are merely aligned in the same direction, they tend to be loose and disjointed. If they are separated, they cannot be handled as one sheet, and the workability when pasting the sheets will be extremely deteriorated. In order to solve such a problem, a sheet in which carbon fibers are arranged in the same direction is backed with a mesh sheet made of glass fibers. However, since the mesh sheet made of glass fiber cannot be directly adhered to the carbon sheet, an adhesive is applied to one entire surface of the carbon sheet, and the mesh sheet is adhered to the adhesive.

The strength of a concrete structure is increased by attaching such a reinforcing fiber sheet to a concrete surface, but the reinforcing fiber sheet is attached to the concrete surface as follows. That is, when attaching the reinforcing fiber sheet to concrete, a liquid matrix resin is applied in advance to the concrete surface, and the reinforcing fiber sheet is attached thereon. When the reinforcing fiber sheet is pasted on the liquid matrix resin, the matrix resin permeates the reinforcing fiber sheet, and the two are integrated, and the reinforcing fiber sheet is bonded to the concrete surface. By bonding the reinforcing fiber sheet to the concrete surface in this way, the strength of the concrete is dramatically increased by the tensile strength of the carbon fiber and the like.

However, the reinforcing fiber sheet as described above has poor air permeability because the entire surface of the carbon sheet is covered with an adhesive. Such poor air permeability makes it difficult for the liquid matrix resin to permeate the carbon sheet. If the matrix resin does not soak, the adhesive strength between the reinforcing fiber sheet and the concrete will be extremely reduced. If the adhesive strength is not sufficient and the reinforcing fiber sheet is detached from the concrete surface, even partially, the reinforcing effect is reduced by half.

[0006] In order to solve the above problems, a reinforced fiber sheet in which an adhesive is not applied to the carbon sheet surface has been considered. This is shown in FIGS.
As shown in FIGS. 27 and 28, this reinforcing fiber sheet
Carbon sheets 1 into two mesh sheets 21 and 2
It is sandwiched between 1. The carbon sheet 1 is exactly the same as that described above, but the mesh sheet 21 is different from the above. That is, as shown in FIG. 25, the mesh sheet 21 shown in FIG.
And a thermoplastic resin thread 23 orthogonal to the glass fiber 22 to form a mesh.

[0007] Such two mesh sheets 21, 2
Between the two, the carbon sheet 1 is sandwiched and pressurized while applying heat. In this case, the portion of the thermoplastic resin yarn 23 adheres to the carbon sheet 1, and the two mesh sheets 21 adhere to both surfaces of the carbon sheet 1 (FIG. 27,
See FIG. 28). As described above, the mesh sheet 21 can be bonded to the carbon sheet 1 via the thermoplastic resin thread 23 without applying an adhesive to the carbon sheet 1. Since the carbon sheet 1 and the mesh sheet 21 are bonded only by the thermoplastic resin yarn 23, the other parts of the carbon sheet 1 have air permeability. Therefore, when attaching this reinforced fiber sheet to concrete,
The matrix resin applied to the concrete surface penetrates into the reinforcing fiber sheet, and the reinforcing fiber sheet can be firmly bonded to the concrete surface.

The reason why the glass fibers 22 of the mesh sheet 21 are made perpendicular to the length direction of the carbon fiber 2 is to hold down the carb sheet 1 so as not to spread in the width direction. If the thermoplastic resin yarn 23 is provided in a direction orthogonal to the length direction of the carbon fiber 2 and the thermoplastic resin yarn 23 is stretched, the carbon fiber 2 is separated. Therefore, the non-stretched glass fiber 22 is made perpendicular to the length direction of the carbon fiber 2. In addition, there are various types of the above-mentioned reinforcing fiber sheet in which physical properties such as tensile strength and elastic modulus are changed according to the purpose of use. However, since the varieties are difficult to distinguish with the naked eye, the mesh sheet lining the carbon sheet 1 is colored and distinguished.

[0009]

In the conventional reinforcing fiber sheet shown in FIGS. 25 to 28, the glass fibers 22 of the mesh sheet 21 do not adhere to the carbon sheet 1, and only the thermoplastic resin yarns 23 adhere to the carbon sheet 1. Glue. Therefore, only the carbon fibers 2 are arranged between the resin yarns 23 and 23, and are not bonded to anything. Therefore, between the thermoplastic resin yarns 23 and 23, the carbon fibers 2 tend to be separated. In particular, at both end portions of the glass fiber 22, that is, at the end portion 1a in the width direction of the carbon sheet 1, the carbon fiber 2 spreads outward and tends to be frayed and separated.

If the carbon fibers 2 are frayed at the end 1a, it becomes difficult to adhere the reinforcing fiber sheet to the concrete surface while pulling the end of the reinforcing fiber sheet. Further, if the end is frayed, the whole shape of the reinforcing fiber sheet also changes. However, if the whole shape changes in this way, it cannot be stuck to a place where the sheet should be stuck. In addition, reinforced fiber sheet,
When rolled for transport or storage, if the ends of the rolls become frayed, the frayed parts will be caught by the surrounding objects, making it impossible to carry or fraying more severely. There was also.

As described above, the carbon fiber 2 at the end is
If a reinforced fiber sheet is used, the frayed end portion is difficult to adhere to the concrete surface, and may not be properly adhered. In particular, at the joint where reinforcing fiber sheets are adjacent to each other, the frayed parts overlap,
Unbonded parts are easy to form. Thus, if there is a portion on the concrete surface where the reinforcing fiber sheet is not bonded, the portion will not be reinforced with the reinforcing fiber sheet. Then, if there is a portion where the reinforcing fiber sheet is not in close contact with the concrete surface, the strength of that portion will be reduced even if another reinforcing fiber sheet is further laminated thereon. As a result, strength unevenness occurs and the strength as a whole becomes insufficient. FIG. 25
Also, in the reinforced fiber sheet shown in FIG.
Can be prevented from fraying. But,
This makes it difficult to perform work on site, and reduces workability.

Further, such a reinforcing fiber sheet is sometimes used for reinforcing a resin molded product such as a boat. In this case, first, a release agent is applied to the inner surface of the mold. Then, a matrix resin is applied thereon, and a reinforcing fiber sheet is laminated on the matrix resin to form a resin molded product reinforced with reinforcing fibers. In this case, the matrix resin penetrates into the reinforcing fiber sheet to be integrated, thereby increasing the strength of the molded product. However, as with concrete structures, if the ends of the reinforcing fiber sheet become frayed,
Not only is workability poor, but sufficient strength may not be obtained.

Further, in the process of manufacturing such a reinforced fiber sheet, a dedicated line is not always provided for each product type. In the case of manufacturing different types of reinforcing fiber sheets with different characteristics on one line, the following setup change work is required when switching types. First, bobbins of different types of carbon fibers are set in order to form a carbon sheet suitable for the type. Furthermore, mesh sheets of different colors must be overlaid on the carbon sheet surface, so when changing types,
Along with changing the carbon fiber bobbins, the mesh sheet rolls must also be replaced.

[0014] As described above, when switching between varieties, it is necessary to perform the work of replacing the rolls of the mesh sheet, which is not directly related to the quality of the reinforcing fiber sheet, so that extra time and labor must be used accordingly. Was. In particular, since the rolls are heavy, the rolls are actually replaced using a forklift or the like. In addition, since the roll of the mesh sheet must be set at a predetermined position with respect to the carbon sheet, it takes time to change the setup. In addition, rolls of mesh sheets of different colors must be prepared for the number of varieties, which has been expensive.

An object of the present invention is to prevent the reinforcing fibers from fraying and to facilitate handling of the reinforcing fiber sheet. In addition, when the reinforcing fiber sheet is used for a concrete structure or a molded product, the workability is good and a sufficient reinforcing effect can be obtained. further,
Another object is to eliminate the necessity of mesh sheets of various colors for identifying a product type and to simplify a setup change operation at the time of product type switching.

[0016]

According to a first aspect of the present invention, there is provided a fiber layer in which reinforcing fibers are aligned in a longitudinal direction to form a strip, and a backing member provided on both front and back sides of the fiber layer.
The present invention is characterized in that the two backing members are provided with protrusions protruding on both sides in the width direction of the fiber layer, and the backing members are joined to each other at the protrusions. Examples of the backing member include a member in which several yarns are arranged in a horizontal direction, and a member in which the yarns are arranged in a matrix shape by arranging the yarns in a matrix. Further, these yarns may be tape-shaped with a wide width. The second invention is characterized in that one or both of the backing members is a mesh sheet. The third invention is such that an adhesive member made of a thermoplastic resin is interposed between the protruding portions of both backing members along the length direction of the fiber layer,
It is characterized in that the protruding portions of both backing members are joined via this adhesive member. The adhesive member may be a thermoplastic resin tape or thread.

According to a fourth aspect of the present invention, the protrusions of both backing members are aligned on the same plane, and the adhesive members are placed on the aligned protrusions along the length direction of the fiber layer. It is characterized in that the protruding portions of both backing members are joined through the intermediary. The fifth invention is characterized in that the backing member and the protruding portion include a thermoplastic resin thread, and the thermoplastic resin thread included in the protruding portion is thermally bonded. The sixth invention is characterized in that the backing member includes a thermoplastic resin yarn, and the backing member is bonded to the fiber layer surface by thermal bonding of the thermoplastic resin yarn. The seventh invention is characterized in that the adhesive members are color-coded for each product type. The eighth invention is characterized in that an identification color member for identifying a type is provided between both backing members. In the ninth invention,
The method for producing a reinforcing fiber sheet is provided with a holding means for holding the restraining material while continuously running the reinforcing fibers in a belt shape, and the restraining material held by the holding means is applied to the running reinforcing fiber with respect to the running reinforcing fiber. Is characterized in that it adheres in a direction crossing it.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment shown in FIGS.
This is a reinforced fiber sheet in which two mesh sheets 3 and 4 are provided on both sides of a carbon sheet 1 which is a fiber layer of the present invention. FIG. 1 shows the entire reinforcing fiber sheet, while FIG. 2 shows only the mesh sheet. However, the carbon sheet 1 is the same as the conventional example. Further, the two mesh sheets 3 and 4 are completely the same, and as shown in FIG. 2, the glass fiber 5 is positioned in the width direction orthogonal to the length direction of the carbon fiber 2, The thermoplastic resin yarn 6 is positioned in the direction. The carbon sheet 1 is sandwiched between the mesh sheets 3 and 4. In the first embodiment, the mesh sheets 3 and 4 constitute a backing member of the present invention. Further, in FIG. 1, another mesh sheet 4 is not visible, but this mesh sheet 4 is located on the back side of the carbon sheet 1 similarly to the mesh sheet 3. And
The glass fibers 5, 7 of both mesh sheets 3, 4 are
The positions in the length direction are matched and overlap.

Each of the mesh sheets 3 and 4 is wound in a roller shape, and is wider than the carbon sheet 1 sandwiched between the mesh sheets 3 and 4. The widened portions of the mesh sheet 3 are formed as protrusions 3a and 3b, and both sides of the mesh sheet 4 are similarly provided with protrusions 4a and 4b. Between the upper and lower protruding portions 3a and 4a on both sides and between the protruding portions 3b and 4b, a resin tape 9 of a thermoplastic resin, which is an adhesive member of the present invention, is sandwiched. The glass fibers 5 and 7 of the upper and lower mesh sheets 3 and 4 are bonded by thermal bonding of the resin tapes 9. Further, the thermoplastic resin yarns 6 and 8 in the length direction are also thermally bonded to the carbon sheet 1. The resin tape 9 is colored to identify the type of the reinforcing fiber sheet.

The reinforcing fiber sheet as described above is manufactured as follows. First, the carbon sheet 1 and the resin tape 9 on both sides thereof are placed on one mesh sheet 4 pulled out from the roller. Further, another mesh sheet 3 is stacked thereon. As described above, when the carbon sheet 1 and the resin tape 9 are sandwiched between the two mesh sheets 3 and 4 and pressurized while heating, the mesh sheets 3 and 4 can be placed on both sides of the carbon sheet 1. And the protruding portions 3 of the mesh sheets 3 and 4
a and 4a and 3b and 4b adhere to each other (see FIGS. 3 and 4).

In such a reinforcing fiber sheet, the carbon sheet 1 is sandwiched between two mesh sheets 3 and 4 so that the carbon fibers 2 do not fall apart. In particular, the protruding portions 3a and 4a on both sides and between 3b and 4b
Since the gap is closed, the carbon fibers 2 located at both ends of the carbon sheet 1 are not frayed apart. Also, in the length direction of this reinforcing fiber sheet,
The thermoplastic resin yarns 6 and 8 adhere to the carbon sheet 1. Moreover, since the thermoplastic resin yarns 6 and 8 are provided at regular intervals, the number of bonding points between the carbon sheet 1 and the mesh sheets 3 and 4 is increased as a whole. The greater the number of bonding points, the easier it is to maintain the overall sheet shape.

In order to maintain the overall shape as described above,
Although the thermoplastic resin yarns 6 and 8 are provided in the length direction of the mesh sheet, the thermoplastic resin yarns 6 and 8 need not always be provided. That is, the mesh sheets 3 and 4 may be constituted only by the glass fibers 5 and 7. However, when the mesh sheets 3 and 4 are formed only of glass fibers, there are no adhesion points between the carbon sheet 1 and the mesh sheets 3 and 4. However, since the protruding portions at both ends of the mesh sheets 3 and 4 can be joined, the carbon sheet 1 is wrapped by the two mesh sheets 3 and 4. By itself, the shape of the carbon sheet 1 can be maintained to some extent. In addition, the width direction of the mesh sheet may be not only glass fiber but also resin thread. However, it is desirable that the material used in the width direction does not easily stretch. This is because if the material in the width direction easily expands, as explained in the conventional example, the carbon fiber 2
This is because they will be separated.

As described above, the reinforcing fiber sheet of the first embodiment is very easy to handle because the carbon fibers 2 of the carbon sheet 1 do not fray or come off. Moreover, since the carbon sheet 1 is wrapped with the two mesh sheets 3 and 4 to maintain the overall shape, the carbon sheet 1 itself also maintains air permeability. If the air permeability is maintained in this manner, the matrix resin easily permeates as described in the conventional example.
Therefore, the reinforcing fiber sheet of this embodiment has good adhesiveness to a concrete surface, and a structure using the same can obtain sufficient strength.

The type of the reinforced fiber sheet is indicated by the color of the resin tape 9 for joining the mesh sheets 3 and 4. Therefore, when the type is changed, only the resin tape 9 needs to be replaced. good. Therefore, as compared with the conventional case where the mesh sheet is replaced together with the roll, the setup change operation at the time of changing the type is simplified and the time can be shortened. As described above, since the type can be identified only by the resin tape 9, unlike the conventional case where the type is identified on the entire mesh sheet, there is no need to prepare several types of mesh sheets having different colors.

In the second embodiment shown in FIGS. 5 to 7, the method of bonding both ends of the mesh sheets 3, 4 as the backing member is the first.
The third embodiment is different from the first embodiment, and the others are the same as the first embodiment. Therefore, here, only the differences from the first embodiment will be described. That is, in the second embodiment, the position of the mesh sheet 3 in the first embodiment is shifted in the length direction with respect to the mesh sheet 4. Therefore, the relative positions of the glass fibers 5 and 7 of the mesh sheets 3 and 4 are shifted. If the relative positions are shifted in this way, the protruding portions 3a, 3b, and 4a of both mesh sheets 3, 4
4b is also shifted. The protruding portions whose relative positions have been shifted in this manner are aligned on the same plane, and the resin tapes 9 are placed along the length direction of the protruding portions aligned on the plane. Glued.

In FIG. 5, the left protruding portion 3a,
Only the resin tape 9 on the 4a side is shown, and the other protruding portion 3 is shown.
The resin tapes on the b and 4b sides are omitted. The reason for omitting the resin tape 9 on the other side is to make it possible to identify the positions of the glass fibers 5 and 7 on the other side. Therefore, in practice, the resin tape 9 is placed on both the left and right protruding portions. As in the first embodiment, thermal bonding is performed in this overlapping state, and FIGS. 6 and 7 show this bonding state. The reinforcing fiber sheet of the second embodiment also wraps the carbon sheet 1 by bonding both ends of the two mesh sheets 3 and 4 in the width direction, so that the carbon fiber 2 Does not fray or come off. Therefore, the handling is simplified and the working efficiency is improved.

In the third embodiment shown in FIGS. 8 and 9, the carbon sheet 1 is made of two mesh sheets 1 as backing members.
This is a reinforcing fiber sheet sandwiched between 0 and 14. The two mesh sheets 10 and 14 have exactly the same configuration, but differ from the first and second embodiments in that the two mesh sheets 11 and 15 and the thermoplastic resin threads 12 and 16 are arranged in the width direction. The type is used. The glass fibers 11 and the thermoplastic resin threads 12 of the mesh sheet 10 and the glass fibers 15 and the thermoplastic resin threads 16 of the mesh sheet 14 are alternately arranged at equal intervals. In the length direction, as in the other examples, only the thermoplastic resin yarns 13 and 17 are used. Then, the protruding portions 10a of the upper and lower mesh sheets 10, 14 sandwiching the carbon sheet 1 are provided.
, 14a, 10b and 14b, the glass fabbers 11 and 15 and the thermoplastic resin threads 12 and 16 overlap.

The protruding portion 1 of the mesh sheet 10
An identification color member 18 indicating the quality of the reinforced fiber sheet is provided along the carbon sheet 1 on the edge on the 0a side. When the carbon sheet 1 is formed, the identification color members 18 are arranged along with the carbon fibers 2. When heat is applied and pressurized in this state, as shown in FIG. 9, the upper and lower thermoplastic resin yarns 12 and 16 of the protruding portions 10a and 10b are thermally bonded to join the mesh sheets 10 and 14. I do. On the carbon sheet 1, the thermoplastic resin yarns 12, 13 and 16, 17
Adhere to each surface of the carbon sheet 1. However, at the protruding portions 10a, 10b, 14a, and 14b, the glass fibers 11 and 15 overlap but are not bonded. This reinforced fiber sheet also has resin yarns 12, 13, 1
The portions other than 6 and 17 have good penetration of the matrix resin and can be firmly adhered to the concrete surface.

As in the third embodiment, the protruding portions 10a, 10b, 14a, 14 of the mesh sheets 10, 14 are provided.
b, the thermoplastic resin yarns 12 and 16 are protruded, and the upper and lower mesh sheets 10 and 14 are aligned with each other.
The thermoplastic resin yarns 12 and 16 can be directly thermally bonded. Therefore, there is no need to separately prepare an adhesive member. Further, in the reinforced fiber sheet of this embodiment, the thermoplastic resin yarns 12, 13 and 16, 17 are bonded to both sides of the carbon sheet 1 vertically and horizontally, so that the shape retaining property is further improved. In the third embodiment, the mesh sheet 1
Glass fibers 11, 15 and resin threads 12, 16 are alternately arranged at equal intervals in the width direction of 0, 14, but these glass fibers 11, 15 and resin threads 12, 16 are not used alternately. The intervals may be different or the intervals may not be equal. Further, the ratio of the number of glass fibers and the number of resin yarns may be different.

As described above, the resin yarn 12 used in the width direction
Although the spacing and number of 16 are free, in the width direction, it is better to use more glass fibers 11 and 15 with less elongation.
The width of the carbon sheet 1 can be easily maintained. On the other hand, resin yarn 1
The narrower the interval between 2, 16 is, the more adhesive parts
It is more effective to prevent the carbon fiber 2 from scattering. However, if the distance between the glass fiber and the resin yarn is too narrow, the flexibility of the reinforcing fiber sheet is impaired, and it becomes difficult to handle the sheet at the site. If the reinforcing fiber sheet does not have flexibility, for example, when the concrete surface has irregularities, it is difficult to make the reinforcing fiber sheet adhere to the surface. In consideration of the above-described characteristics, the spacing between the resin yarns 12 and 16 and the roughness of the entire mesh can be determined, and a mesh sheet suitable for the intended use can be used.

In the third embodiment, the glass fibers 11 of one mesh sheet 10 and the glass fibers 15 of the other mesh sheet 14 are overlapped so as to coincide with each other. If the 11 and the other thermoplastic resin yarn 16 are overlapped so as to coincide with each other, the glass fiber 11 and the thermoplastic resin yarn 16 can be thermally bonded. By doing so, the mesh sheets 10 on both sides of the carbon sheet 1
Since the number of joints of the fourteenth embodiment increases, from the third embodiment,
The effect of preventing fraying increases. Further, since the identification color member 18 of the third embodiment does not need to be a medium for thermal bonding, any material may be used. For example, any color, such as tape, string, fiber bundle, or the like made of cotton or hemp, may be used. Then, when the type is changed, if the identification color member is replaced, the mesh sheet does not need to be replaced, so that the setup change operation is simplified.

As described above, the identification color member of the quality indication may be made of any material, and may be provided anywhere between the two mesh sheets. For example, FIG.
In the fourth embodiment shown in FIG. 0, a tape-shaped identification color member 19 having a color indicating a product type is provided at the center of the carbon sheet 1. This identification color member 19 is made of carbon fiber 2
And sandwiched between the same mesh sheets 3 and 4 as in the first embodiment. The protruding portions 3a and 4a, 3b and 4b of the mesh sheets 3 and 4 are thermally bonded by a thermoplastic resin tape 9. However, in this embodiment, the resin tape 9 does not have to be colored to indicate the type. If the resin tape 9 is not colored with a type identification color, the resin tape 9 can be used in common for all types.

The fifth embodiment shown in FIG. 11 is a reinforced fiber sheet similar to the fourth embodiment, except that an identification color member 20 made of a colored sheet piece is provided. As described above, the identification color members 20 are intermittently arranged in the length direction of the reinforcing fiber sheet to display the type. When forming the carbon sheet 1, the identification color member 20 is also placed thereon and fixed by the mesh sheet 3. As described above, since the identification color member 20 is a small piece, the cost is not increased, and the color change at the time of changing the type is easy.

The sixth embodiment shown in FIGS. 12 and 13 is different from the first embodiment in that the backing member is composed of only the weft. That is, in the sixth embodiment, one backing member in which the glass fiber 24 and the resin yarn 25 as the weft are alternately arranged, the glass fiber 26 and the resin yarn 2 as the weft are also arranged.
7 are alternately arranged and the other backing member.
One backing member extends along the surface of the carbon sheet 1, and the other backing member extends along the back surface. Also,
Each weft of both backing members protrudes on both sides in the width direction of the carbon sheet 1. A thermoplastic resin tape 9 is interposed between the upper and lower weft yarns 24 and 26 and 25 and 27, and the above-mentioned weft yarn is bonded via the resin tape 9.

As shown in FIG.
It is wound as a weft thread roll 28 in a state of being bonded to a release sheet 29. When the backing member wound on the roll is actually used, the following is performed. First,
The release sheet 29 is fed out from the roll 28, and the both sides of the carbon sheet 1 are covered with the release sheet 29, and the carbon sheet 1 is sandwiched between both backing members. After the carbon sheet 1 is sandwiched between the two backing members, a resin tape 9 is interposed between the backing members, and the two backing members are bonded via the resin tape 9. The weft yarn as the backing member is attached to the resin tape 9.
Then, the release sheet 29 is peeled off.

[0036] The reinforcing fiber sheet thus obtained is also used as a backing member for the carbon sheet 1 as in the other embodiments.
Can be wrapped around to prevent fraying of the edges. In addition,
In FIG. 12 showing the sixth embodiment, the respective weft yarns of the two backing members are vertically stacked, but they may be staggered and adhered to the resin tape 9. At this time, the resin tape 9 may be interposed between the weft threads, or the weft thread may be bonded to any one surface of the resin tape 9.

In the sixth embodiment, the resin tape 9
Although the two backing members are adhered by using, the backing members may be directly adhered to each other. However, in this case, the glass fiber and the resin yarn of the weft must be bonded. This is because unless the glass fiber is bonded to the resin thread, there is no means for fixing it. Further, all of the weft yarns used for the backing member can be resin yarns. In this case, the resin yarn can be bonded to the carbon sheet, or the resin yarns can be bonded to each other.

As described above, all of the reinforcing fiber sheets of the first to sixth embodiments prevent the carbon sheet 1 from being frayed, are easy to handle, and improve workability on site. In addition, when used in concrete structures and molded articles, the matrix resin easily penetrates, and a sufficient reinforcing effect can be obtained. Further, since it is not necessary to replace the mesh sheet when changing the product type, there is no need to prepare mesh sheets of different colors, and the labor and time for the setup change operation can be reduced. Note that, in each of the above embodiments, the case where carbon fiber is used as the reinforcing fiber has been described. However, depending on the physical properties, metal, resin fiber such as glass fiber or aramid may be used.

Further, the mesh sheet may be formed by using other resin in addition to the glass fiber and the thermoplastic resin yarn. However, in order to prevent the reinforcing fibers such as carbon fibers from fraying, it is better to use a material which has a small elongation in the width direction of the sheet. On the other hand, unlike the above embodiments, one of the front and back surfaces may be a mesh sheet and the other may be a weft yarn. However, providing a mesh sheet can also provide an adhesive portion in the length direction of the carbon sheet 1 rather than backing both sides with weft yarns, and the shape retention of the carbon sheet 1 is increased.

Seventh Embodiment to First Embodiment shown in FIGS.
Example 6 shows a method for producing a reinforcing fiber sheet.
The embodiments described above relate to completely different manufacturing methods. The seventh embodiment shown in FIG. 14 shows a method of manufacturing a reinforced fiber sheet in which a linear resin member 30 is adhered to a position on the carbon sheet 1 across the width direction. In the seventh embodiment, the transfer roller 31 and the transfer roller 3
And a hopper 32 that supplies the resin member 30 onto the first hopper 1. The transfer roller 31 rotates while being in contact with the carbon sheet 1. That is, the transfer roller 31 contacts the surface of the carbon sheet 1 conveyed in the direction of arrow A and rotates in the direction of arrow B. The hopper 32 is provided with a heating means (not shown) and holds the thermoplastic resin 30a in a molten state. Further, a slit is formed in the bottom of the hopper 32, and the molten resin 30a is transferred from the slit to the transfer roller 31.
I put it on the surface. And this hopper 3
2, the linear resin member 30 is intermittently supplied, and the resin member 30 is placed on the surface of the transfer roller 31 at a predetermined interval.

The resin member 30 placed on the transfer roller 31
Is transferred in the molten state by the rotation of the transfer roller 31, and is transferred onto the carbon sheet 1. The resin member 30 placed on the carbon sheet 1 is
By being pressed in step 1, it penetrates into the carbon fiber. With the resin member 30 soaked, the carbon sheet 1 moves in the direction of arrow A. Carbon sheet 1
Moves in the direction of arrow A, the resin member 30 on the carbon sheet 1 cools and hardens. As described above, when the resin member 30 penetrates into the carbon sheet 1 and cures, the resin member 30 binds and restrains a large number of carbon fibers constituting the carbon sheet 1. Therefore, a reinforcing fiber sheet in which the end of the carbon sheet 1 is not frayed is obtained. In the seventh embodiment, the resin 30a and the resin member 30 correspond to the restraint member of the present invention, and the hopper 32 and the transfer roller 31
These form a holding means for the restraining material.

In the seventh embodiment, as in the first to sixth embodiments, it is possible to manufacture a reinforcing fiber sheet in which reinforcing fibers are not frayed without using a sheet-like backing member such as a mesh sheet. Therefore, a step of forming a resin thread, glass fiber, or the like into a mesh shape becomes unnecessary. Of course, there is no need to purchase a mesh sheet from outside. Therefore, the cost can be reduced accordingly.

When the mesh sheet is used, a roll of the mesh sheet is necessary as is apparent from the above-described embodiment. Since the mesh sheet needs the same or larger area as the reinforcing fiber sheet to be manufactured, the roll of the mesh sheet becomes very large. In addition, when backing both sides, two large rolls must be prepared. However, according to the manufacturing method of the seventh embodiment, a large roll for the backing member is not required. Therefore, the space of the production line can be saved.

The eighth embodiment shown in FIG.
The third embodiment is different from the seventh embodiment in that a resin rod 30b obtained by curing a resin 30a is inserted therein. The hopper 32 discharges the resin rods 30 b in the hopper 32 one by one and puts them on the transfer roller 33.
The transfer roller 33 has a heating function (not shown), and can melt the resin member 30b placed on the surface.

A method of manufacturing a reinforced fiber sheet using the resin rod 30b and the transfer roller 33 as described above will be described below. While the carbon sheet 1 is running in the direction of arrow A, one resin rod 30 b is placed on the transfer roller 33 from the hopper 32. The transfer roller 33 rotates in the direction of arrow B, and heats the resin rod 30b while transporting the resin rod 30b on the surface to the surface of the carbon sheet 1. The resin rod 30 b heated by the transfer roller 33 is sufficiently melted before reaching the carbon sheet 1. Therefore, when the resin rod 30b is transferred onto the carbon sheet 1 and pressed by the transfer roller 33, the resin rod 30b bites between the carbon fibers,
In this state, the vehicle travels together with the carbon sheet 1. During traveling on the carbon sheet 1, the resin rod 30b cools down and cures again.

Thus, similarly to the seventh embodiment, it is possible to manufacture a reinforced fiber sheet in which both ends are not frayed without using a sheet-like backing member. That is, in the eighth embodiment, the resin rod 30b is the restraining member of the present invention. Note that also in the eighth embodiment, the hopper 32 and the transfer roller 33 constitute a restraining member holding unit. Since the transfer rollers 31 and 33 of the seventh and eighth embodiments press the carbon sheet 1 and rotate, the transfer rollers 31 and 33 can also be used as a feed roller for running the carbon sheet 1.

The ninth embodiment shown in FIG. 16 is different from the ninth embodiment shown in FIG. 14 in that the hopper 34 having the resin 30a in the molten state is moved up and down so that the resin member 30 is placed directly on the carbon sheet 1. Different from the seventh embodiment. The above hopper 34
Is provided with a heating means for keeping the resin 30a in a molten state. The hopper 34 moves up and down in a predetermined cycle, linearly extrudes the molten resin 30a from a slit formed in the lower portion of the hopper 34, and presses the linear resin member 30 against the surface of the carbon sheet 1. Has become.

On the other hand, the carbon sheet 1 is traveling at a constant speed in the direction of arrow A. Therefore, the resin member 30 in the molten state is provided on the carbon sheet 1 at regular intervals.
Will be imposed. The resin member 30 placed on the carbon sheet 1 is initially in a molten state, but is cooled and hardened while traveling with the carbon sheet 1. Since the resin member 30 is impregnated between the carbon fibers when in the molten state, it can be restrained by curing. That is, in the ninth embodiment, the resin member 30 is the restraining member of the present invention, and the hopper 34 is the holding means of the restraining member.

The tenth embodiment shown in FIG.
This is a method in which the molten resin 30a put into the carbon sheet 1 is transferred and adhered to the carbon sheet 1 running in the direction of arrow A by the transfer bar 36. First, the transfer bar 36 is immersed in the resin 30a in the bat 35, and the resin 30a is attached to the transfer bar 36. Next, the transfer bar 36 is pressed onto the carbon sheet 1 so that the resin member 3 is placed on the carbon sheet 1.
Transfer 0. In this way, the transfer bar 36 is reciprocated between the inside of the bat 35 and the carbon sheet 1 repeatedly by a mechanism not shown. In this way, the resin member 30 placed on the carbon sheet 1 at a predetermined interval cools and hardens while the carbon sheet 1 is running. The first
In the embodiment, the resin member 30 is a restraining member, and the butt 35 and the transfer bar 36 are holding means.

The eleventh embodiment shown in FIG. 18 is a method of manufacturing a reinforced fiber sheet by placing a resin member 30 on a carbon sheet 1 using a screen printing technique. A screen 37 is overlaid on the carbon sheet 1, and a molten resin is applied on the screen 37. A pattern of the resin member 30 is formed on the screen 37. When the molten resin is applied, the resin member 30 according to the pattern is printed on the carbon sheet 1.
At this time, the resin member 30 is in a molten state and seeping into the carbon fibers is the same as in the seventh to ninth embodiments.

On the other hand, the running of the carbon sheet 1 is stopped while the screen 37 is overlapped and the molten resin is applied. Then, when the resin member 30 is printed, it moves in the direction of the arrow A by the length of the screen 37. As described above, when the printing and the movement are repeated and the resin member 30 on the carbon sheet 1 is cured, the reinforced fiber sheet is completed. In the tenth embodiment, the molten resin and the resin member 30 are restraining members, and a hopper (not shown) containing the molten resin is holding means for the restraining members.

In the seventh to tenth embodiments, the molten resin member 30 or the molten resin rod 30b is placed on the carbon sheet 1 and then cured so that the carbon fibers are not frayed. This is a method for producing a reinforced fiber sheet. The method of placing the resin in a molten state on the carbon sheet 1 is not limited to the method of the above embodiment, but various methods can be used. For example, in the twelfth embodiment shown in FIG. 19, the tube 38 containing the resin 30a in the molten state is squeezed to put the resin member 30 in the molten state on the carbon sheet 1. And
The tube 38 is a means for holding the restraining member of the present invention.

The thirteenth embodiment shown in FIG. 20 is a method in which the resin member 30 is put on the roller 39 which is the holding means of the body member of the present invention. The roller 39 has a concave portion 39a on the roller surface, and a nozzle 40 for supplying the molten resin 30a to the concave portion 39a above the roller 39. When the resin 30a is supplied to the concave portion 39a, the roller 39 is caused to run in the width direction of the carbon sheet 1, and the resin member 30 is put thereon. After forming one resin member 30 in this way, each time the carbon sheet 1 is moved in the direction of arrow A by the pitch of the resin member 30, the molten resin member 30 is impregnated into the carbon sheet 1. Can be lined up. Thereafter, the resin member 30 is cured to produce a non-raveled reinforcing fiber sheet.

As in the fourteenth embodiment shown in FIG.
Using No. 1, it is also possible to draw a line with a resin in a molten state. Also in this case, the carbon sheet 1 is caused to travel in the direction of arrow A at a predetermined pitch while drawing the resin member 30, and the resin is cured during the travel to complete the reinforced fiber sheet.

The fifteenth embodiment shown in FIG.
The molten resin 30a stored in 2 is dropped from the bottom surface,
This is a method for forming the resin member 30. Hopper 42
It is fixed at a predetermined position and has a mechanism for periodically dropping a required amount of the resin 30a. Then, the carbon sheet 1 is moved in the direction of the arrow A at a required pitch in accordance with the drop timing of the resin 30a, and the resin member 30 is placed at a predetermined interval. As described above, in order to drop the resin 30a, it is preferable to sufficiently melt the resin 30a and reduce the viscosity as much as possible.

The method of curing the resin member 30 in the molten state is not limited to natural cooling, as in the seventh to fifteenth embodiments. . Further, the type of the resin is not limited to the thermoplastic resin, and a thermosetting resin, an ultraviolet curable resin, or the like can be used. However, when a thermosetting resin is used, a heating step is required as a curing step, and when an ultraviolet curable resin is used, an ultraviolet irradiation step must be provided. In addition, when any resin is used, it must be melted when placed on the surface of the carbon sheet 1. This is because the resin member 30 has to permeate the carbon sheet 1.

In the sixteenth embodiment shown in FIGS. 23 and 24, one end of a resin thread 30c made of a thermoplastic resin is
In this method, the shuttle 43 is moved to put the resin thread 30c on the carbon sheet 1. The shuttle 43 is a carbon sheet 1 traveling in the direction of arrow A.
Is reciprocated in a direction crossing the carbon sheet 1.
By reciprocating the shuttle 43, the resin yarns 30c are put on the carbon sheet 1 as a plurality of wefts.

After the resin thread 30c is placed on the carbon sheet 1, the resin thread 30c is melted, and the molten resin member 30c is impregnated into the carbon sheet 1. FIG. 24 shows a process of melting the resin member 30c placed on the carbon sheet 1 and impregnating the resin into the carbon sheet 1. As shown in FIG.
The carbon sheet 1 with 0c runs in the direction of arrow A, and passes through the heating device 44. The inside of the heating device 44 is maintained at a temperature sufficient to melt the resin member 30c. Therefore, at first, the resin yarn 30c simply placed on the carbon sheet 1 is heated in the heating device 44 to be in a molten state. When the resin yarn 30c is melted, it penetrates into the carbon sheet 1. In this state, the carbon sheet 1
However, when the resin yarn 30c exits from the heating device 44, the resin yarn 30c is cooled and hardened by the outside air, and a reinforced fiber sheet with no frayed ends is formed.

The means for melting the resin thread 30c is not limited to the heating device 44. For example, the resin thread 30c can be melted while being pressed by a heating roller or an iron. On the contrary, if the heating device 44 shown in FIG. 24 is used, the resin rod 30 can be moved from the hopper 32 of the eighth embodiment.
b may be placed directly on the carbon sheet 1. In this case, a means for melting the resin rod 30b may be a heating roller, an iron, or the like. In short, as long as the resin rod 30b placed on the carbon sheet 1 can be melted, the heating means may have any configuration.

As described above, according to the manufacturing methods of the seventh to seventeenth embodiments, it is possible to manufacture a reinforced fiber sheet having no frayed ends without using a sheet-like backing member. Although the seventh to sixteenth embodiments have been described using carbon fibers as the reinforcing fibers, metal, glass fibers, resin fibers, and the like may be used.

In the seventh to sixteenth embodiments, the restraining material is adhered to the surface of the carbon sheet 1. However, the transfer rollers 31, 33 and the like of the seventh and eighth embodiments are placed under the carbon sheet 1. Side, and a restraining material may be attached to the back surface of the carbon sheet 1. Further, a restraining material can be attached to both front and back surfaces of the carbon sheet 1. In this case, after the constraining material is attached to one surface, the carbon sheet 1 may be turned over, and the constraining material may be attached to the other surface. Alternatively, the transfer rollers of the seventh and eighth embodiments may be used. ,
A restraining material may be simultaneously attached to both surfaces. In the case where the restricting material is attached to both surfaces of the carbon sheet 1 as described above, the positions of the restricting materials in the longitudinal direction on both the front and back surfaces may be shifted instead of matching.

[0062]

According to the first invention, the backing member sandwiching the fiber layer is joined at both ends in the width direction,
The fiber layer can be wrapped to prevent the reinforcing fibers from fraying. Therefore, this reinforced fiber sheet is easy to handle and workability is improved. Also, the fiber layer itself
Since the air permeability is maintained, the matrix resin easily permeates when used for a concrete structure or molded article, and a sufficient reinforcing effect can be obtained. According to the second invention,
Since the backing member is provided along both the vertical and horizontal directions of the fiber layer, it is easy to maintain the shape of the fiber layer. According to the third aspect, the backing member made of any material can be easily bonded by thermal bonding via the bonding member.

According to the fourth aspect, even when the positions of the two backing members do not coincide with each other in the upper and lower directions, the two members can be connected via the adhesive member. According to the fifth aspect, the protruding portions of the backing member can be directly heat-bonded without using an adhesive member. According to the sixth aspect, the backing member is also adhered to the fiber layer surface, and the shape of the reinforcing fiber sheet can be maintained. According to the seventh and eighth aspects, it is not necessary to replace the backing member at the time of changing the product type, so that the work and time for the setup change operation can be reduced. Further, since a backing member of a different color is unnecessary, the cost can be saved. In particular, in the seventh aspect, the number of members can be reduced because the adhesive member can also serve as the identification color member.

According to the ninth aspect, it is possible to manufacture a reinforcing fiber sheet in which reinforcing fibers are not frayed without using a sheet-like backing member. Therefore, the manufacturing cost can be reduced because the sheet-shaped backing member is not required. In addition, since no roll of the backing member is required, the space for the manufacturing process can be saved.

[Brief description of the drawings]

FIG. 1 is a plan view of a first embodiment.

FIG. 2 is a plan view of the mesh sheet of the first embodiment.

FIG. 3 is a sectional view taken along line III-III of FIG. 1;

FIG. 4 is a partially enlarged view of FIG. 3;

FIG. 5 is a plan view of the second embodiment.

FIG. 6 is a sectional view taken along line VI-VI of FIG. 5;

FIG. 7 is a sectional view taken along the line VII-VII of FIG. 5;

FIG. 8 is a plan view of a third embodiment.

9 is a sectional view taken along line IX-IX in FIG.

FIG. 10 is a plan view of a fourth embodiment.

FIG. 11 is a plan view of a fifth embodiment.

FIG. 12 is a plan view of a sixth embodiment.

FIG. 13 is a perspective view of a weft thread roll according to a sixth embodiment.

FIG. 14 shows a manufacturing process of the seventh embodiment.

FIG. 15 shows a manufacturing process of the eighth embodiment.

FIG. 16 shows a manufacturing process of the ninth embodiment.

FIG. 17 shows a manufacturing process of the tenth embodiment.

FIG. 18 shows a manufacturing process of the eleventh embodiment.

FIG. 19 shows a manufacturing step of the twelfth embodiment.

FIG. 20 shows a manufacturing process of the thirteenth embodiment.

FIG. 21 shows a manufacturing process of the fourteenth embodiment.

FIG. 22 shows a manufacturing process of the fifteenth embodiment.

FIG. 23 shows a manufacturing step of the sixteenth embodiment.

FIG. 24 shows a step of melting the resin of the sixteenth embodiment.

FIG. 25 is a plan view of a conventional example.

FIG. 26 is a plan view of a conventional mesh sheet.

FIG. 27 is a sectional view taken along line XXVII-XXVII in FIG. 25.

FIG. 28 is a partially enlarged view of FIG. 27;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Carbon sheet 2 Carbon fiber 3, 4 Mesh sheet 3a, 3b Extruded part 4a, 4b Extruded part 9 Resin tape 10, 14 Mesh sheet 10a, 10b Extruded part 14a, 14b Extruded part 12, 16 Resin thread 18, 19, 20 Identification Color member 24, 26 Glass fiber 25, 27 Resin thread 30 Resin member 30a Resin 30b Resin rod 30c Resin thread 31, 33 Transfer roller 32, 34, 42 Hopper 35 Butt 36 Transfer bar 37 Screen 38 Tube 39 Roller 41 Brush 43 Shuttle

Claims (9)

[Claims] 1. A fiber layer in which reinforcing fibers are arranged in a belt shape with the longitudinal direction thereof aligned, and backing members provided on both front and back surfaces of the fiber layer, wherein the both backing members protrude on both sides in the width direction of the fiber layer. A reinforcing fiber sheet comprising a protruding portion, wherein the backing members are joined to each other at the protruding portion. 2. The reinforcing fiber sheet according to claim 1, wherein one or both of the backing members is a mesh sheet. 3. An adhesive member made of a thermoplastic resin is interposed between the protruding portions of both backing members along the length direction of the fiber layer, and the protruding portions of both backing members are joined via the adhesive member. The reinforcing fiber sheet according to claim 1 or 2, wherein 4. The protrusions of both backing members are aligned on the same plane, and an adhesive member is placed on the aligned protrusions along the length direction of the fiber layer. The reinforcing fiber sheet according to claim 1 or 2, wherein the protruding portions of the members are joined. 5. The reinforced fiber sheet according to claim 1, wherein the backing member and the protruding portion include a thermoplastic resin yarn, and the thermoplastic resin yarn included in the protruding portion is thermally bonded. 6. The backing member according to claim 1, wherein the backing member includes a thermoplastic resin yarn, and the backing member is adhered to the fiber layer surface by thermal bonding of the thermoplastic resin yarn. Reinforced fiber sheet. 7. The reinforcing fiber sheet according to claim 3, wherein the adhesive member is color-coded for each product type. 8. The reinforcing fiber sheet according to claim 1, wherein an identification color member for identifying a variety is provided between both backing members. 9. A reinforcing device comprising a holding means for holding a restraining material while continuously running the reinforcing fibers in a belt shape, and applying the restraining material held by the holding means to the running reinforcing fiber. A method for producing a reinforcing fiber sheet that adheres in the transverse direction.