JP2016179422A - Resin-impregnated roller device, and maintenance and reinforcement method of structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a resin-impregnated roller device which can be applied to an object having a small curvature radius, and can be applied as well to an object of which the curvature radius differs relatively significantly, and provide a maintenance and reinforcement method of a structure using the same device.SOLUTION: A resin-impregnated roller device 1 includes a plurality of roller bodies 3 which can be arranged side by side, a flexible strip body 4 which extends by passing through radial center parts of the plurality of roller bodies 3 and rotatably supports the plurality of roller bodies 3, a holding tool 5 which can hold both side parts of a support part of the flexible strip body 4 for the plurality of roller bodies 3, a holding body 6 which can fix the holding tool 5, and a handle 7 connected to the holding body 6. A maintenance and reinforcement method of a structure uses the same device.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a resin impregnated roller device used in a method of repairing and reinforcing a concrete structure or a steel structure having deteriorated or surface defects using a resin and a fiber sheet, and repair of a structure using the device. -Reinforcing method.

  After applying a resin such as epoxy resin to a concrete structure or steel structure that has deteriorated or surface defects, affixed with a fiber sheet made of continuous reinforcing fibers, etc., and then pressed it with a resin impregnated roller. A construction method is known in which a composite material form in which a fiber sheet is impregnated with a resin is formed to repair or reinforce a deteriorated part or a defective part. As a resin impregnated roller device used for such repair / reinforcement method, for example, a device disclosed in Patent Document 1 is known.

  In Patent Document 1, when a continuous fiber sheet is attached to an object to be repaired or reinforced, in order to uniformly and efficiently impregnate the resin even when the surface of the object has a curved surface or an uneven surface, There is provided a resin-impregnated roller in which an outer peripheral portion of a roller body portion is made of an elastic material having a static shear modulus in a predetermined range.

JP 2002-66437 A

  However, the apparatus disclosed in Patent Document 1 may not exhibit a sufficient resin impregnation effect on a curved surface having a small radius of curvature due to its form. In particular, it has been difficult to apply to an object such as a steel pipe member whose radius of curvature is in a relatively small range of 50 mm to 500 mm. In addition, since the outer peripheral part of the roller body part is made of an elastic material, the outer shape of the roller body, in particular, the outer shape of the roller body in the axial direction of the roller, although it can follow small irregularities on the surface of the object. As for the (roller body generatrix), it is basically used in its initial shape, so it is difficult to use the same resin-impregnated roller device when the radius of curvature of the object changes relatively large. Met. In other words, when the curvature radius of the object changes greatly, it is necessary to use another resin-impregnated roller device having a different initial shape, and the degree of freedom in use of each resin-impregnated roller device is small. The problem remained.

  Therefore, the object of the present invention is applicable to an object having a small radius of curvature, focusing on the problems in the conventional apparatus as described above, and the same for an object having a relatively large curvature radius. It is an object of the present invention to provide a resin-impregnated roller device that can be applied to the apparatus and has a high degree of freedom in use of the apparatus and is extremely convenient for use in construction, and a structure repair / reinforcement method using the apparatus.

  In order to solve the above problems, a resin-impregnated roller device according to the present invention includes a plurality of roller bodies that can be arranged side by side and extending through the radial center of the plurality of roller bodies. A flexible strip that is rotatably supported; a holder that can hold both side portions of the support portions of the plurality of roller bodies of the flexible strip; a holder that can fix the holder; And a handle connected to the holding body.

  In such a resin-impregnated roller device according to the present invention, the plurality of roller bodies are rotatably supported by the flexible strips in a state of being arranged in parallel. A portion of the flexible strip that supports the plurality of roller bodies by holding both sides of the portion supporting the plurality of roller bodies by the holder and fixing both holders to the holder. The extended shape of the flexible strip, in particular, the curved shape (in other words, the radius of curvature) is determined as a desired shape. Accordingly, the radius of curvature of the flexible strip can be determined substantially freely according to the radius of curvature of the resin-impregnated object, and the flexible strip is disposed along the extending direction. The curvature radii of the outer envelopes of the plurality of roller bodies are set to a desired size substantially freely. As a result, it can be applied as an optimum resin-impregnated roller device even for an object having a small curvature radius. Further, if the fixing position of the holder to the holding body is changed, the curvature radius of the flexible strip portion supporting the plurality of roller bodies between the fixing positions can be easily changed. It is possible to easily cope with relatively different objects by simply changing the fixing position of the holder to the holding body with the same device, and the degree of freedom in using the device is increased. , Convenience in use is improved. The resin impregnated roller device, which can be applied to an object with a small curvature radius and can cope with a change in the curvature radius of the object, operates a handle connected to a holding body. By being moved along the shape of the object, the resin is impregnated on the object.

In the resin impregnated roller device according to the present invention, it is preferable that the flexible strip has a bending rigidity of 100 to 500 kN · mm ² with respect to its own deformation. That is, in the resin-impregnated roller device according to the present invention, the flexible strip has a predetermined softness so that the plurality of roller bodies can follow the outer surface shape of the object to be repaired or reinforced having a curvature. Since it is a feature, the elastic recovery rate of the flexible strip is important. As a method for specifying the elastic recovery rate, the product of the elastic modulus of the material and the moment of inertia of the cross section is defined as bending stiffness (EI), and this bending stiffness is preferably in the range of 100 to 500 kN · mm ^2. is there. For example, when steel is used in the conventional apparatus, EI = 10000 kN · mm ² or more, and since it hardly deforms during the impregnation operation, the outer shape of the object can only be used on a flat surface. In the present invention, since the flexural rigidity of the flexible strip is within the above range, the outer envelopes of the plurality of roller bodies arranged along the extending direction of the flexible strip are easily substantially real. Therefore, even when the outer surface shape of the object has a large or small curvature radius, it is possible to easily realize a resin-impregnated roller device having an optimum shape.

  As a specific form of the flexible strip, for example, the flexible strip is a string or wire strip made of a material having elastic restoring force, or a coil spring in which adjacent coils are in contact with each other. The form formed by can be adopted.

  Further, in the resin impregnated roller device according to the present invention, when the radius of curvature when the flexible strip itself is curved or the outer envelope of the plurality of roller bodies supported by the flexible strip is curved. The curvature radius is preferably configured to be 1000 mm or less, and more preferably configured to be 500 mm or less. If comprised in this way, it will become easy to apply to the target object in which the curvature radius of steel pipe members etc. is comparatively small range of 50 mm to 500 mm which was difficult with the above-mentioned conventional device.

  Moreover, in the resin impregnated roller device according to the present invention, it is preferable that the holder is provided so that its position can be adjusted along the extending direction of the holder. Since the holder holds both side portions of the support portions of the plurality of roller bodies of the flexible strip, the flexible strip located between the holding positions can be adjusted by adjusting the holding position by adjusting the position of the holder. The bending allowance of the body can be adjusted, whereby the radius of curvature of the outer envelope of the plurality of roller bodies supported by the flexible strip can be adjusted. Therefore, by adjusting the position of this holder, it can be used for objects with different radii of curvature in the same device, greatly improving the degree of freedom in use of the device, and convenience in use during construction. Is improved.

  In this case, a long hole extending in a direction along the extending direction is formed in the holding body, and the holding tool is provided so as to be movable along the long hole and fixed after the movement. It is possible to easily and more accurately perform the position adjustment and the fixing after the adjustment.

  In the resin impregnated roller device according to the present invention, the shape and the like of the holding body are not particularly limited, but it is preferably extended so as to open on both sides of the connection position with the handle. In such a configuration, the holding body is positioned so as to cover an object having a certain radius of curvature with a portion extending so as to open on both sides of a connection position with the handle and a portion therebetween. Therefore, the apparatus can be more easily positioned with respect to the repair / reinforcement part of the object more easily, and the ease and convenience of work can be improved.

  In addition, a configuration in which the holding body is configured to be able to adjust the opening angle on both sides of the connecting position with the handle, or is configured to be exchangeable with a holding body having a different opening angle is preferable. In such a configuration, it is possible to easily cope with a change in the radius of curvature of the object as necessary.

  In the resin impregnated roller device according to the present invention, the structure of the roller body is not particularly limited, but the roller body includes an outer ring portion having a convex cross-sectional shape toward the outer side in the outer diameter direction. Preferably it is. In such a structure, at the time of construction, each roller body can be efficiently pressed toward the object.

  In this case, the outer ring portion preferably has at least one shape selected from, for example, an abacus ball shape, a screw shape, a number of groove shapes, and a drum shape. By adopting such a shape, it is possible to improve the adhesion in pressing to the object, improve the followability to the unevenness of the object surface, further improve the workability of the roller body itself, etc. it can.

  Further, in this case, regarding the structure of the roller body, any form in which each roller body has one outer ring part or a form in which a plurality of outer ring parts are connected can be adopted. .

  In the resin impregnated roller device according to the present invention, the connection structure between the holding body and the handle is not particularly limited, but it is preferable that the connection angle of the handle to the holding body is adjustable. In such a configuration, it is possible to adjust the connection angle of the handle that is easy to work according to the object, the surrounding environment, the construction site condition, and the like, so that workability can be improved.

  The present invention also provides a method for repairing / reinforcing a structure, in which a fiber sheet is pasted after applying a resin to the structure and then pressed using the resin impregnated roller device as described above. To do. As the fiber sheet, for example, a reinforcing fiber sheet can be used. As the reinforcing fiber sheet, for example, a fiber sheet made of continuous reinforcing fibers such as carbon fibers, glass fibers, aramid fibers, and phenol fibers can be used. For example, an epoxy resin can be used as the resin to be applied.

  In such a repair / reinforcement method for a structure according to the present invention, the resin impregnated roller device which can be applied to an object having a small curvature radius as described above and which can cope with a change in the curvature radius of the object. Since the resin impregnation work by pressing is performed using the, the work for the desired repair / reinforcement is easily and efficiently performed for the range to be repaired / reinforced.

  Thus, according to the resin impregnated roller device according to the present invention, the same device can be used for an object having a small radius of curvature and also for an object having a different radius of curvature. It is possible to provide an extremely convenient resin impregnated roller device that can greatly improve the degree of freedom of the resin. By performing a resin impregnation operation using this resin impregnation roller device, it is possible to easily and efficiently perform a desired repair and reinforcement operation.

It is a schematic front view of the resin impregnation roller apparatus which concerns on one embodiment of this invention. It is a schematic block diagram of the measuring apparatus which shows the measurement / calculation method of the bending rigidity of the flexible strip in the resin impregnation roller apparatus based on this invention. It is a schematic front view which shows one example of the roller body in the resin impregnation roller apparatus which concerns on this invention. It is a schematic front view which shows another example of a roller body in the resin impregnation roller apparatus which concerns on this invention. It is a schematic front view which shows another example ((A), (B)) of the roller body in the resin impregnation roller apparatus which concerns on this invention. It is a schematic front view which shows another example of a roller body in the resin impregnation roller apparatus which concerns on this invention. It is a schematic front view which shows one example of the holding body and handle in the resin impregnation roller apparatus which concerns on this invention. It is a schematic side view of the form of FIG. It is a schematic side view which shows another example of a holding body and a handle in the resin impregnation roller apparatus which concerns on this invention. It is a schematic side view which shows another example of a holding body and a handle in the resin impregnation roller apparatus which concerns on this invention.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 shows a resin impregnated roller device 1 according to an embodiment of the present invention, and illustrates a steel pipe 2 to be repaired and reinforced as a structure to be repaired and reinforced. The resin impregnated roller device 1 shown in FIG. 1 extends through a plurality of roller bodies 3 arranged side by side and the radial center of the plurality of roller bodies 3, and rotatably supports the plurality of roller bodies 3. And 5 holding fixtures 5 for holding both side portions of the support portions of the plurality of roller bodies 3 in the extending direction of the flexible strip 4 (two in each side portion in the illustrated example) A holder 5), a holder 6 to which the holder 5 can be fixed, and a handle 7 connected to the holder 6.

  The flexible strip 4 is configured to rotatably support the plurality of roller bodies 3 and is formed of a strip that is curved with a curvature radius that can be changed with respect to its extending direction, and has a target curvature radius. After being curved, the curved shape is fixed via a holder 5 fixed to the holder 6. In this embodiment, each holding tool 5 is provided so that position adjustment is possible along the extending direction of the holding body 6, and the long hole formed in the holding body 6 so that it may extend in the direction along the extending direction. It is provided so as to be movable along (not shown), and after being moved and adjusted in position, it is fixed to a predetermined position of the holding body 6.

As described above, in the present invention, since the flexible strip 4 has a predetermined softness, the plurality of roller bodies 3 can follow a reinforcement object having a curvature. The elastic recovery rate of the body 4 is important, and as a method for specifying the elastic recovery rate, the product of the elastic modulus of the material and the moment of inertia of the cross section is defined as the bending stiffness, and this bending stiffness is preferably 100 to 500 kN · mm ^2. . Examples of the material of the flexible strip 4 satisfying such conditions include metals (SS400, SUS304, etc.) and various plastics, and a material that can ensure bending rigidity in the above range by applying a certain amount of tension. (For example, piano wire). Examples of the form include a string-like or wire-like strip made of a material having elastic restoring force, or a coil spring (contact spring) in which adjacent coils are in contact with each other. As a specific example of using such a coil spring, for example, wire diameter: φ1.8 mm (range: φ0.5-2.5 mm), coil outer diameter: 6.5 mm (range: , About 1.0 to 10 mm), coil spring length: 250 mm (as a range, 100 mm to 1000 mm).

Moreover, regarding the measurement of the bending rigidity of the flexible strip 4 described above, the following method shown in FIG. 2 was used in the present invention. That is, as shown in FIG. 2, the flexible strip 4 is fixed on the measuring table 11 using the fixture 12 (fixed length = 50 mm), taken out into the air with a length of 200 mm, A weight 13 of 100 g is placed, and the amount of flexure of the flexible strip 4 (flexure length (displacement): δ mm) is measured. The bending rigidity EI is calculated from the result (deflection amount) using the following equation.
δ = PL ³ / 3EI
P: Weight of weight (100g)
L: Take-out length (200mm)
EI: Flexural rigidity

As a result of the measurement of the bending rigidity, with the above method, two types of outer diameters of 6 mm and 8 mm (test specimens) were used for a flexible strip formed of a spiral coil spring (adhesion spring) which is an embodiment of the present invention. Names No. 1 and No. 2) and the results of measuring the bending stiffness are shown in Table 1. In Table 1, as a comparison, the bending rigidity when using a conventionally used SS400 round steel is also described (test bodies No. 3 and No. 4). In addition, the test body No. 3, no. About 4, it shows as a calculated value at the time of using SS400 whose elastic modulus E is 208 kN / mm < ² >.

  As the above-mentioned roller body 3, it is calculated | required that it is the shape excellent in impregnating resin, for example in a continuous fiber sheet. Therefore, it is preferable that the surface has a convex cross-sectional shape of 0.1 mm to 5 mm, and in order to form the convex shape, for example, an abacus ball shape, a screw as shown in FIGS. Examples include shapes, groove shapes, and drum shapes. The size of the roller body is preferably, for example, a radius of 1 mm to 50 mm and a length of 1 mm to 200 mm in order to have a function of following a curved surface. It is preferable to use 2 to 20 roller bodies in one resin-impregnated roller device because the work efficiency can be increased by contacting a plurality of roller bodies with the object to be repaired or reinforced. As a material, any of metal (SS400, SUS304, etc.) and plastic (especially acetal resin or polyethylene resin which does not react with epoxy resin is desirable) can be used.

3 to 6 show examples of the shape of the roller body 3.
FIG. 3 shows an example of the roller body 3a formed in an abacus ball shape. In this way, because the outer ring portion of each roller body is convex when formed into an abacus ball shape, the outer shape of the entire array of roller bodies has a high degree of freedom and a small curvature radius Can also be used easily.

  FIG. 4 shows an example of a roller body 3b formed in a screw shape (a groove between each screw thread is not on a plane perpendicular to the flexible strip 4 (rotating shaft)). When formed into a screw shape in this way, the number of roller bodies can be reduced as compared with the abacus ball shape, so that the manufacture is facilitated. Moreover, there exists an advantage that it is easy to cut at the time of roller body preparation by using screw shape.

  FIGS. 5A and 5B show examples of roller bodies 3c1 and 3c2 formed in a number of groove shapes. When formed in such a groove shape, for example, the fibers of the fiber sheet and the protrusions of the roller body can be made parallel to each other, and there is an advantage that the fibers are hardly damaged.

  FIG. 6 shows an example of a roller body 3d formed in a drum shape. When the drum shape is formed in this manner, the roller body itself can have a curvature, and the degree of adhesion can be further improved.

  7 and 8 show an example of one form of the holding body 6 and the handle 7, which is substantially the same as the form shown in FIG. The holding body 6 may be configured to be more rigid than the flexible strip 4 and difficult to be deformed. As a material, any of metal (SS400, SUS304, etc.) and plastic can be used. The holding body 6 is preferably extended so as to open on both sides of the connection position with the handle 7, and the opening angle θ <b> 1 can be adjusted as necessary. In the form shown in FIG. 7, it is preferable that the holding body 6 bends at least twice, and the angle of the bent portion (bending angle θ2) is in the range of 5 to 90 °. This bending angle θ2 can be freely changed and set.

  The handle 7 is preferably about 25 mm in diameter and 150 mm in length considering the ease of work. As a material, any of metal (SS400, SUS304, etc.), plastic, and wood can be used.

Various structures can be adopted for the connection structure of the handle 7 to the holding body 6.
For example, as shown in FIG. 8, it can be set as the form which is screwed so that the handle 7 may stand upright on the plane of the holding body 6 via the connecting screw 21. Such a configuration has the advantage that it is easy to manufacture and has good hand rigging.

  In addition, as shown in FIG. 9, the metal fitting 22 may be attached to the plane of the holding body 6 and the handle 7 may be fixed (for example, screwed) so as to be parallel to the plane of the holding body 6. In such a form, it becomes easy to move a roller body in parallel with a desired direction, and it is hard to damage the fiber of a fiber sheet.

  Further, as shown in FIG. 10, a pair of (2 sets) resin impregnated roller device holders 6 are connected by a handle 7 via a metal fitting 22 so as to be parallel, and a pair of resin impregnated roller devices. Can be configured to move in the same direction. That is, depending on the angle at which the roller body and the object to be repaired / reinforced, the convex portion of the roller body may not be parallel to the fibers of the fiber sheet, and the fibers may be damaged. Therefore, as shown in FIG. 10, a pair of resin-impregnated roller devices are connected by a handle 7 and a metal fitting 22 so as to be parallel to each other. In such a form, by attaching one pair in parallel, the angle formed by the holding body 6 and the object to be repaired / reinforced can always be maintained at a right angle, so that there is an advantage that the fibers of the fiber sheet are hardly damaged.

  In addition, about the holder 5 (FIG. 1), it can respond to the change of the diameter of the steel pipe 2 as a repair and reinforcement object by changing a fixing position to the extending direction of the holding body 6. FIG. As the material of the holder 5, either metal (SS400, SUS304, etc.) or plastic can be used.

  Thus, according to the resin impregnated roller device 1 according to the present invention as described above, it can be used easily and appropriately even on an object having a small radius of curvature, and the degree of freedom in use is great. Convenient usage can be realized. By performing the resin impregnation operation using the resin impregnation roller device 1, a desired repair / reinforcing operation can be easily and efficiently performed.

  The resin impregnated roller apparatus according to the present invention can be applied to repair and reinforcement work for virtually any structure using a fiber sheet and a resin.

DESCRIPTION OF SYMBOLS 1 Resin impregnation roller apparatus 2 Steel pipe 3, 3a, 3b, 3c1, 3c2, 3d object to be repaired / reinforced Roller body 4 Flexible strip 5 Holder 6 Holder 7 Handle 11 Measuring base 12 Fixing tool 13 Weight 21 Connecting screw 22 Metal fittings

Claims (14)

  A plurality of roller bodies that can be arranged side by side, a flexible strip that extends through the radial center of the plurality of roller bodies and rotatably supports the plurality of roller bodies, and the flexible strip A resin impregnation comprising: a holder capable of holding both side portions of the support portions of the plurality of roller bodies; a holder capable of fixing the holder; and a handle connected to the holder. Roller device. The resin-impregnated roller device according to claim 1, wherein the flexible strip has a bending rigidity of 100 to 500 kN · mm ² with respect to its deformation.   The flexible strip is formed of a string-like or wire-like strip made of a material having elastic restoring force, or a coil spring in which adjacent coils are in contact with each other. Resin impregnation roller device.   1000mm or less can be achieved as the radius of curvature when the flexible strip itself is curved or the radius of curvature when the outer envelopes of the plurality of roller bodies supported by the flexible strip are curved The resin impregnated roller device according to any one of claims 1 to 3, wherein   The resin impregnated roller device according to any one of claims 1 to 4, wherein the holder is provided so that the position of the holder can be adjusted along the extending direction of the holder.   6. A long hole extending in a direction along the extending direction is formed in the holding body, and the holding tool is provided so as to be movable along the long hole and fixed after being moved. Resin impregnated roller device.   The resin impregnated roller device according to any one of claims 1 to 6, wherein the holding body is extended so as to open on both sides of a connection position with the handle.   The said holding body is comprised so that adjustment of the opening angle in the both sides of the connection position with the said handle is possible, or it is provided so that replacement | exchange is possible for the holding body from which this opening angle differs. The resin impregnated roller device according to any one of the above.   The resin impregnated roller device according to any one of claims 1 to 8, wherein the roller body includes an outer ring portion having a convex cross-sectional shape toward the outer side in the outer diameter direction.   The resin-impregnated roller device according to claim 9, wherein the outer ring portion has at least one shape selected from an abacus ball shape, a screw shape, a number of groove shapes, and a drum shape.   11. The resin-impregnated roller device according to claim 9, wherein each of the roller bodies has one outer ring portion or a structure in which a plurality of the outer ring portions are connected.   The resin impregnated roller device according to claim 1, wherein a connection angle of the handle to the holding body is adjustable.   A method for repairing / reinforcing a structure, comprising: applying a resin sheet to a structure, attaching a fiber sheet, and pressing the fiber sheet using the resin-impregnated roller device according to claim 1. .   The method for repairing / reinforcing a structure according to claim 13, wherein the fiber sheet is a reinforcing fiber sheet.

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