JP2002070324A - Resin-impregnated roller and structural body reinforcing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an excellent resin-impregnated roller and a structural body reinforcing method using it having a function of uniformly and efficiently impregnating a fiber sheet stuck to a flat, curved, or rugged wavy face with resin. SOLUTION: This resin-impregnated roller is constituted of a roller main body, a holding shaft for the roller main body, a bearing, and a handle. The outer circumference part of the roller main body is formed of an elastic material having a tension modulus ranging 100-250 GPa in measurement based on JISZ 2241 and a wire diameter of 0.5-5 mm and consisting of a coil spring with a coil effective diameter of 10-50 mm. In this structural body reinforcing method, the fiber sheet is stuck to the structural body after application of the resin, and the fiber sheet is pressed from the upper side by means of the resin- impregnated roller.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a resin-impregnated roller used when a fiber sheet is attached and constructed, and a method of reinforcing a structure using the roller.

[0002]

2. Description of the Related Art Conventionally, there has been known a method in which a resin sheet impregnated with a resin impregnated roller is used to press a fiber sheet together with an impregnated adhesive resin in order to promote resin impregnation when the fiber sheet is applied.

[0003]

In such a resin impregnated roller, when the sticking surface is an ideal flat surface, the generatrix of the cylindrical virtual outer peripheral surface of the roller body abuts the fiber sheet almost uniformly. If the surface is curved or has uneven undulations, the bus bar does not uniformly contact the fiber sheet, but only partially, so that the resin impregnation becomes uneven and the work efficiency decreases. I do. In addition, the bus part 2 mentioned here
Is, for example, as shown in FIG. 2, an intersection line between an arbitrary virtual plane including the rotation center axis of the virtual outer peripheral surface of the roller main body and the virtual outer peripheral surface of the roller main body. Is a straight line, and the imaginary outer peripheral surface of the cylinder is a portion that can make line contact with a plane. Also, the case where the virtual outer peripheral surface portion is in the shape of a drum or a barrel is defined in the same way, and the bus bar portion 2 at that time is a curve.

In order to solve this problem, the shape of the imaginary outer peripheral surface of the roller body may be changed from a cylindrical shape to a drum-shaped or barrel-shaped one in which the radius of curvature of the sticking surface and the generatrix are matched. In each case, a resin-impregnated roller having the same radius of curvature as that of the application surface must be manufactured, and the resin-impregnated roller must be used separately for the flat surface and the curved surface for the application surface where the flat surface and the curved surface coexist. Needed. In addition,
The radius of curvature referred to here includes the rotation center axis in a state where the roller body is in contact with the application surface in such a manner that the rotation center axis is substantially horizontal to the application surface, and is substantially perpendicular to the application surface. If a virtual plane is assumed, the intersection of the virtual outer peripheral surface of the roller body and the virtual plane, that is, the radius of curvature of the generatrix of the roller body is defined as the radius of curvature of the virtual outer peripheral surface of the roller body. Let the radius of curvature of the intersection line be the radius of curvature of the attachment surface. Furthermore, the actual attachment surface has almost no ideal flat surface or curved surface, and generally has irregularities or undulations, and it is almost impossible to cope with these.

The present invention has been made in view of the background of the prior art.
A roller excellent in the function of impregnating a resin into a fiber sheet attached to a flat surface and a curved surface or a surface having irregular undulations, and can uniformly and efficiently impregnate the resin into the fiber sheet. An object of the present invention is to provide an excellent resin-impregnated roller and a method of reinforcing a structure using the same.

[0006]

The present invention employs the following means in order to solve the above-mentioned problems. That is, in the resin-impregnated roller of the present invention, in the resin-impregnated roller composed of the roller body and the holding shaft of the roller body, a bearing and a handle, the outer peripheral portion of the roller body is measured based on JIS Z 2241. Tensile modulus is 10
It is in the range of 0 to 250 GPa and the wire diameter is 0.5 to 5 mm
Wherein the coil has an effective diameter of 10 to 50 mm and is made of an elastic material made of a coil spring. Further, the method of reinforcing a structure according to the present invention is characterized in that a fiber sheet is attached after applying a resin to the structure, and the structure is pressed using the resin impregnated roller described above.

[0007]

DETAILED DESCRIPTION OF THE INVENTION The present invention is directed to a roller excellent in the function of impregnating a resin into a fiber sheet attached to a flat surface, a curved surface, or a surface having irregular undulations. In addition, the present inventors have intensively studied excellent resin-impregnated rollers capable of efficiently impregnating the fiber sheet with a resin, and solved such problems at once by providing a coil spring portion on an outer peripheral portion of the resin-impregnated roller. Is what we can do.

As shown in FIG. 1, the oil impregnated roller of the present invention comprises a roller body A, a holding shaft B, a bearing C and a handle D, all of which are made of a solid material. Further, FIG.
As shown in FIG. 2, the outer peripheral portion of the roller body is generally composed of a thread-like projection 3, a plurality of abacus ball projections 4, and a plurality of needle-like projections 5, as shown in FIG. The imaginary outer peripheral surface portion 1 composed of the protruding tip portions has a substantially cylindrical shape. Here, the virtual outer peripheral surface portion 1 is a substantially cylindrical curved surface that smoothly contacts almost all of the protrusion tip portions.

Generally, a fiber sheet is composed of a large number of single fibers each having a diameter of several microns to several tens of microns, and the tip of the protrusion of the roller body is impregnated with resin by cutting into the sheet in which the fibers are accumulated. Is promoted.

That is, according to the present invention, the bus bar of the virtual outer peripheral surface of the resin impregnated roller body is uniformly and efficiently brought into contact with the application surface in accordance with the shape of the fiber sheet application surface.
By providing the coil spring on the outer peripheral portion of the roller main body, the virtual outer peripheral surface portion of the roller main body is flexibly deformed as a whole. That is, the coil spring has a function of flexibly deforming according to the shape of the fiber sheet surface when the generatrix portion of the roller main body is pressed against the application surface, and evenly contacting the fiber sheet surface. It is.

According to the present invention, an outer peripheral portion of a roller body of a flexible resin impregnated roller composed of a roller body and a holding shaft, a bearing and a handle of the roller body is provided in a range of 100 to 250.
An elastic material with a tensile modulus in the range of GPa and a wire diameter of 0.3
The coil spring has a diameter of 5 to 5 mm and an effective diameter of the coil of 10 to 50 mm.

Incidentally, the tensile modulus in the present invention is defined by JIS
It is a value obtained from the stress and strain data in the elastic region among the stress and strain data obtained by the tensile test of the elastic material, which is measured based on the “metal material tensile test method” of Z 2241. The elastic material of the present invention is not limited to a metal material.

Such a coil spring can be made of at least one kind of material selected from metal materials and the like.
For example, at least one type of protrusions selected from the group consisting of a screw, an abacus, and a needle formed of at least one type selected from a solid material and an elastic resin on the outer peripheral portion of the coil of a coil spring made of a metal material. Can be used in a direction substantially perpendicular to the roller body, and a coil spring that forms the surface of the elastic material at the end can be used.

What is important in these coil springs is that the imaginary outer peripheral surface of the roller body has elasticity such that it can be appropriately deformed by an appropriate force. When mounted in a cylindrical shape, the coil spring has a tensile modulus of 100 to 250 GPa,
Wire diameter is 0.5-5mm, effective coil diameter is 10-50mm
Are preferably used.

As a specific example of the roller body of the present invention,
For example, as a structure in which a screw-shaped projection is coupled to a coil spring, there is a structure in which a coil is spirally formed in the same manner as a screw, and a peak-shaped projection is formed on the outer peripheral side of the coil of the coil spring wire along the wire. More specifically, there is a wire made of a wire having a cross-sectional shape obtained by projecting a part of a circle so as to be a coil spring such that the protrusion is located on the outer peripheral side of the coil.

[0016] When the resin-impregnated roller composed of the roller body having the above-mentioned structure presses the fiber sheet attachment surface having irregularities, the coil spring wires that have come into contact with the attachment surface are successively deformed by one pitch adjacent to the wire material. As the screw-shaped protrusions connected to the outer periphery of the coil spring are continuously displaced, the screw-shaped protrusions uniformly contact the irregularities on the attaching surface. Further, if the shape of the roller body composed of the coil spring is made to be a barrel shape with a bulging center or a drum shape with a central part constricted according to the range of the radius of curvature of the uneven adhesion surface, the generatrix of the roller body and the fiber It is possible to further increase the amount of contact (the amount of contact) with the surface to which the sheet is attached. In addition, as another form of the roller main body, there is a method in which a plurality of needle-like projections are connected to a coil spring. Specifically, there is a structure in which many small holes are formed in the surface of the coil spring wire on the outer peripheral side of the coil, and needle-like projections are protruded therefrom.

When the roller body having the outer peripheral portion made of such a coil spring presses the attaching surface of the fiber sheet,
The generatrix of the virtual outer peripheral surface of the roller main body formed by the plurality of protrusion tip portions is deformed so as to conform to the shape of the fiber sheet sticking surface so as to conform to the shape, and the protrusion tip portions are evenly and efficiently. , Which can be brought into contact with the attachment surface.

The resin impregnated roller of the present invention will be further described with reference to the drawings. The resin-impregnated roller of the present invention includes a roller body A, a holding shaft B, a bearing C, and a handle D, as shown in the cross-sectional view of FIG.
And a plurality of abacus ball projections 4 or a plurality of needle-shaped projections 5. The roller body of the conventional type is all made of a solid material, but in the present invention, the base 6 of the roller body is a coil spring, and the screw-like projections 3, the abacus ball projections 4 or the plurality of needle-like projections 5 are provided on the surface thereof. It has a structure. Since each projection is supported by a coil spring, when the roller body is pressed against the fiber sheet attachment surface, each projection is flexibly displaced according to its shape, and is evenly distributed on the fiber sheet surface. Has the function of contacting

FIG. 2 is a perspective view of the resin-impregnated roller, showing a virtual outer peripheral surface portion 1 composed of a tip end portion of the projection of the roller body and a bus bar portion 2 that comes into contact with the sticking surface. The virtual outer peripheral surface portion has a cylindrical shape, a drum shape, and a barrel shape, and each of the bus portions 2 has a radius of curvature. However, in the case of a cylindrical shape, the radius of curvature is considered to be infinite (∞).

FIG. 3 shows one of the embodiments, in which a fiber sheet is stuck on a convex sticking surface and the effect of resin impregnation with a cylindrical resin impregnated roller is to be quantitatively measured. Things. That is, after the impregnated resin 8 is applied to the semicylindrical convex-shaped attaching surface 7 having the curvature radius E, the fiber sheet 9
The roller body is rolled in the longitudinal direction of the top while pressing the cylindrical resin impregnated roller with a constant force on the roller body, and reciprocates at the same position.
If the resin impregnates sufficiently, the resin will seep out onto the fiber sheet. Therefore, by measuring the impregnation width 10, it is possible to quantitatively determine the suitability of the resin impregnating roller to the shape of the application surface.

When the roller of the present invention is used to reinforce a structure such as a pier or a chimney of a road bridge using a carbon fiber sheet impregnated with a resin, the base material may have some irregularities. Also, the resin can be efficiently spread between the carbon fibers. Further, in addition to the above columns, the present invention can be suitably used for repairing and reinforcing various structures such as various floor slabs, inner walls of tunnels, and wall surfaces of concrete structures.

Hereinafter, a case where a concrete pier of a road bridge is repaired or reinforced is specifically described as an example.

First, the base of the target column is ground by sanding or the like, and the base is processed. This treatment has the purpose of smoothing the surface and exposing the clean concrete surface, thereby facilitating the subsequent treatment. In addition, cleaning and chamfering of corners may be performed as necessary.

Next, the concrete surface is reinforced by uniformly applying and impregnating a primer such as an epoxy resin. When the coating is performed, it can be performed using a brush or a roller brush, but of course, the roller of the present invention may be used. As the primer used in this step, for example, the viscosity at 23 ° C. is 300 to 600 mPa ·
It is preferable to use an epoxy resin in the range of S because it easily penetrates into concrete. It is preferable to apply the primer in an amount of 0.2 to 0.4 kg / m ² . After finishing this process, 6-24
It is preferable to cure for a time.

Next, an epoxy resin or the like as a putty is filled into the step of the mold or a defect portion on the surface so as to make the surface smooth. In this processing, for example,
When correcting the step of the formwork, the height should be within 1 mm and the gradient should be 1/10 or less. In addition, it is preferable to perform R finishing at the protruding corner and the entering corner. In this case, the radius of the R processing is 20
It is preferably within the range of 40 mm. After the completion of this treatment, it is preferable to cure for 6 to 24 hours.

Next, in a state where the primer is dry to the touch (the finger is not sticky), an adhesive resin is evenly applied to the fiber sheet sticking position with a brush, a roller brush, a rubber spatula or the like, and an undercoating process is performed. Do. As the adhesive resin used, it is preferable to use an epoxy resin having a viscosity of 3,000 mPa · S or less at 20 ° C. It is preferable to apply the coating so that the basis weight is in the range of 100 to 500 g / m ² . Coating may be performed at once, or 400 g
/ M ² or more, the coating may be performed in two or more applications.

Next, a reinforcing fiber sheet such as a carbon fiber sheet or a glass fiber sheet is wound around the pillar and attached.
As a reinforcing fiber sheet to be used, for example, when a carbon fiber sheet is used, a plain-woven fiber sheet is preferable. This may be a one-way weave or a two-way weave. In addition, when wound around a pillar, it may be performed while overlapping little by little in a spiral shape, or may be cut and pasted to an appropriate length or size. in this case,
It is preferable to attach the fiber so that the direction of the fiber is perpendicular to the axial direction of the column because the reinforcing effect is enhanced. In the case where a cell page exists at the end of the fiber sheet, the reinforcing effect can be further enhanced when the cell sheet is attached such that the direction of the cell page is perpendicular or substantially perpendicular to the axial direction of the pillar. Of course, the cell page may be cut and pasted.

After the fiber sheet is attached, the fiber sheet is pressed by using the roller of the present invention and squeezed to spread the adhesive resin and expel air in the fiber to remove bubbles. In this case, the effect is enhanced by moving the roller in the fiber direction or in the direction perpendicular thereto. After this treatment, further, as the top coat, the same resin as the resin used in the undercoat is applied, and the defoaming treatment is similarly performed by pressing using a roller. The basis weight is preferably the same as in the case of the undercoat.

The above operation is performed when one layer of the fiber sheet is attached. However, when two or more layers are applied, the operation after the undercoating process may be repeated. In that case,
It is preferable that the fiber directions of the fiber sheets to be attached are different because the reinforcing effect is further enhanced.

After completion of each of the above-mentioned treatments, if necessary, the resin is cured with a vinyl sheet or the like so that rain does not adhere to the resin in order to harden the resin to develop a predetermined strength.
The curing period may be at least two weeks if the average temperature is about 10 ° C, and one week or more if the average temperature is about 20 ° C.

After curing, a paint or a protective material or the like is applied or sprayed as necessary to finish. When flame retardancy or fire resistance is required, it is preferable to arrange by finishing with mortar, non-combustible board, or the like.

[0032]

The present invention will be described in more detail with reference to the following examples. Example 1 As a resin-impregnated roller, the roller body is a solid type in which the roller body is entirely a solid material as before, and the flexible type in which the outer peripheral portion of the roller body of the present invention is a coil spring, and the roller body shape is cylindrical. Was prepared.

The flexible-type roller main body is made of a wire having a tensile elasticity of about 210 GPa and a cross-sectional shape obtained by protruding a part of a circular shape having a cross-sectional shape of 2 mm so that the protruding portion is located outside the coil. By forming the coil into a cylindrical shape having an effective diameter of 20 mm, the coil spring structure was provided with screw-shaped projections.

Further, as a fiber sheet sticking surface, a semi-cylindrical convex surface having a curvature radius of 0.5 m was prepared, and the following experiment and evaluation were performed.

That is, an appropriate amount of resin is applied to the surface on which the convex-shaped convex fiber sheet having a radius of curvature of 0.5 m is adhered, and the fiber sheet is adhered thereon. The top of the convex shape is rolled in the longitudinal direction of the top of the semi-cylindrical convex surface three times while being pressed by a solid-type and flexible-type resin impregnated roller with a force of 1 kg each. At that time, the impregnation promoting effect of each resin impregnation roller was evaluated by measuring the width of the fiber sheet impregnated with the resin.

As an example, FIG. 3 shows an example in which a resin is pre-coated on the semi-cylindrical convex sticking surface, a fiber sheet is stuck, and the roller body is impregnated with a resin by a cylindrical resin impregnating roller.

As a result, the impregnation width when using the solid-type resin impregnated roller is 3 cm, whereas the impregnation width when using the flexible-type resin-impregnated roller is 8 cm. It was confirmed that the impregnated roller could contact the fiber sheet attachment surface with a wider width.

Further, when a construction test was carried out with both types of resin-impregnated rollers using a real structure having a semicylindrical convex surface having a radius of curvature of 0.5 m, the flexible-type resin-impregnated rollers were significantly larger than the solid-type resin-impregnated rollers. The work efficiency was good and the effectiveness of the flexible resin impregnated roller was confirmed. Example 2 As the resin-impregnated roller, the roller body was a solid type in which the entire roller body was a solid material as before, and the roller type of the present invention was a flexible type in which the outer peripheral portion of the roller body was formed of an elastic material. A 1.5 m drum-shaped thing was prepared.

The flexible-type roller main body is made of a wire having a tensile elasticity of about 210 GPa and a cross-sectional shape obtained by protruding a part of a circular shape having a cross-sectional shape of 2 mm, so that the protruding portion is outside the coil, and By coiling into a drum shape with a minimum effective diameter of the coil of 20 mm and an outer shape of 1.5 m radius of curvature,
A coil spring structure having a screw-like projection was used.

As a fiber sheet sticking surface, a convex surface having a radius of curvature of 0.5 m was prepared, and the following experiment and evaluation were performed.

That is, an appropriate amount of resin is undercoated on the surface on which the convex-shaped fiber sheet having a curvature radius of 0.5 m is adhered, and the fiber sheet is adhered thereon. The top of the convex shape is rolled in the longitudinal direction of the top of the semi-cylindrical convex surface three times while being pressed by a solid-type and flexible-type resin impregnated roller with a force of 1 kg each. At that time, the impregnation promoting effect of each resin impregnation roller was evaluated by measuring the width of the fiber sheet impregnated with the resin.

As a result, the impregnation width when the solid-type resin impregnated roller is used is 5 cm, whereas the impregnation width when the flexible-type resin-impregnated roller is 9 cm. It was confirmed that the impregnated roller could contact the fiber sheet attachment surface with a wider width.

Further, when a construction test was carried out using both types of resin-impregnated rollers using a real structure having a semi-cylindrical convex surface having a radius of curvature of 0.5 m, the flexible-type resin-impregnated rollers were significantly larger than the solid-type resin-impregnated rollers. The work efficiency was good and the effectiveness of the flexible resin impregnated roller was confirmed. Example 3 As the resin-impregnated roller, the roller body is a solid type in which the roller body is entirely a solid material as in the past, and the flexible type in which the outer periphery of the roller body of the present invention is a coil spring. Shaped, barrel-shaped thing was prepared. In addition, about a drum shape and a barrel shape, the curvature radius was set to two types, 0.5 m and 1.5 m, respectively.

The flexible-type roller body is made of a wire having a tensile modulus of about 210 GPa and a cross-sectional shape obtained by protruding a part of a circular shape having a cross-sectional shape of 2 mm so that the protruding portion is located outside the coil. The coil spring structure was provided with screw-shaped protrusions by forming the coil into a cylindrical shape with an effective diameter of the coil of 20 mm or a drum shape or a barrel shape with a minimum effective diameter of the coil of 20 mm and an outer peripheral shape of 1.5 m in radius of curvature.

In addition, four types of fiber sheet attachment surfaces having a convex shape having a radius of curvature of 0.5 m and 1.5 m and a concave shape having an atomoid shape having a radius of curvature of 0.5 m and a flat surface having a total of five types were prepared. The following experiments and evaluations were performed.

That is, an appropriate amount of resin is applied to the surface of the fiber sheet having five types of curvature radii including a flat surface, and the fiber sheet is bonded thereon. The solid type and the flexible type are each impregnated with 5 types of resin impregnated rollers.
While being pressed by the force described above, the roller is rolled in the longitudinal direction of the crest in the case of the semi-cylindrical convex surface, and is rolled in the longitudinal direction of the groove in the case of the rain-tooth-like concave surface, and is reciprocated three times at the same position. At that time, the impregnation promoting effect of each resin impregnation roller was evaluated by measuring the width of the fiber sheet impregnated with the resin.

From the above experimental results, data as shown in Table 1 were obtained. However, the combination of cylindrical solid and flexible resin impregnated rollers and a convex convex surface with a radius of curvature of 0.5 m, and the combination of drum-shaped solid and flexible resin impregnated rollers with a convex convex surface with a radius of curvature of 0.5 m are implemented. The data of Examples 1 and 2 were diverted.

[0048]

[Table 1]

(Note 1) The roller has a total length of 10 cm.

(Note 2) The + symbol indicates that the fiber sheet is in contact with both ends of the roller body due to the difference in the radius of curvature between the sticking surface and the generatrix of the virtual outer peripheral surface of the roller body, and the impregnation points are divided into two places.

As is apparent from Table 1, when the resin-impregnated roller body is of a solid type in which all of the solid material is formed of a solid material, the curvature radius of the virtual outer peripheral surface of the roller body and the curvature radius of the fiber sheet attachment surface coincide with each other. Although the entire generatrix of the roller main body hits the affixing surface to obtain an impregnation width that is the full width of the roller, if the curvature radii do not match, the impregnation width becomes extremely small. A typical roller of a conventional type has a roller body entirely made of a solid material and has a cylindrical shape. However, when the sticking surface is other than a flat surface, the impregnation width is small. On the other hand, in the case of a flexible type in which the outer peripheral portion of the resin-impregnated roller main body, which is an improved type, is configured by a coil spring, the generatrix of the virtual outer peripheral surface portion of the roller main body is deformed according to the irregularities of the fiber sheet sticking surface. A wide impregnation width was obtained even for the application surface having a different curvature from that of the above, and the effectiveness of the flexible resin impregnation roller was confirmed.

It should be noted that these effects of the flexible type were almost the same in any of the abacus ball projection type and the acicular projection type.

[0053]

According to the present invention, it is possible to uniformly and efficiently carry out resin impregnation on a flat or curved surface or a surface having uneven undulations on the surface to which the fiber sheet is attached. For example, repair of structures such as pillars such as piers and chimneys of road bridges, various types of floor slabs, inner walls of tunnels, and walls of concrete structures can be greatly improved. And reinforcement can be suitably and efficiently performed.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an example of a flexible resin impregnated roller of the present invention.

FIG. 2 is a perspective view showing an example of a resin impregnated roller.

FIG. 3 is a perspective view showing an embodiment of the present invention.

[Explanation of symbols]

 A: Roller body B: Holding shaft C: Bearing D: Handle E: Radius of curvature 1: Virtual peripheral surface 2: Busbar 3: Screw-shaped projection 4: Abacus ball projection 5: Needle-shaped projection 6: Base 7: Kamaboko convex sticking surface 8: Impregnated resin 9: Fiber sheet 10: Impregnated width

Claims (6)

[Claims] A resin-impregnated roller comprising a roller body and a holding shaft, a bearing and a handle of the roller body,
The outer peripheral portion of the roller body has a tensile modulus of elasticity measured based on JIS Z 2241 in the range of 100 to 250 GPa, a wire diameter of 0.5 to 5 mm, and an effective diameter of the coil of 10 to 5 GPa.
A resin-impregnated roller made of an elastic material made of a coil spring in a range of 0 mm. 2. The resin-impregnated roller according to claim 1, wherein the holding shaft of the roller body also serves as a bearing. 3. The roller material according to claim 1, wherein at least one type of protrusion selected from the group consisting of a screw, an abacus ball and a needle is provided on the outer periphery of the coil spring. The resin-impregnated roller according to claim 1 or 2, wherein the resin-impregnated roller has a structure in which a plurality of members are gathered in a vertical direction, and a surface of the elastic material is formed at a tip portion. 4. The resin-impregnated roller according to claim 1, wherein the protrusion is at least one selected from wood, metal, mineral and plastic. 5. Reinforcement of a structure, characterized in that a fiber sheet is attached after applying a resin to the structure, and the fiber sheet is pressed from above using the resin impregnated roller according to any one of claims 1 to 4. Method. 6. A structure reinforced by the reinforcing method according to claim 5.