JP2018100547A - Support post reinforcement method and heating system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a support post reinforcement method capable of effectively curing resin impregnated in reinforced fibers by uniformly heating an outer periphery portion of the support post when reinforcing a support post which has obstacles such as ribs, and a heating system.SOLUTION: The support post reinforcement method includes: a reinforcement fiber arrangement step (S2); a heating member attachment step (S4); a heat equalizing plate arrangement step (S4); and a curing process (S6,S7). In the reinforcement fiber arrangement step S2, reinforcement fibers 20 impregnated with uncured matrix resin are arranged over the outer periphery face 51a of the support post 50. In the heating member attachment step, the a band heater 13 is attached by winding the same on the outer periphery face of the reinforcement fibers 20. In the heat equalizing plate arrangement step, a heat equalizing plate 14 with heat conductivity is 200 Wm*K or more is disposed between the outer periphery face of the reinforcement fiber 20 and the inner peripheral surface of the band heater 13 so as to protrude from the edge of the band heater 13 according to a shape of the rib 52. In the cure step, a heating system 10 is driven to drive the band heater 13 to give heat via the heat equalizing plate 14 to cure a matrix resin impregnated in the reinforcement fibers 20.SELECTED DRAWING: Figure 10

Description

  The present invention relates to a reinforcing method and a heating system that reinforce a column including an obstacle such as a rib.

In recent years, the necessity of countermeasures against the aging of lighting pillars and sign pillars, which are road accessories, has been advocated.
Some of these metal tube pillars are embedded in the foundation concrete and others are bolted to the foundation concrete by a base plate structure.

  For example, in Patent Document 1, as a reinforcing method for performing rust prevention treatment and anticorrosion treatment of a support, an on-site cured soft carbon fiber reinforced prepreg and a carbon fiber reinforced plastic plate in which a fiber reinforced prepreg is wound around a support and the resin is cured are used. A structure strengthening method is disclosed.

JP-A-1-197532 JP 2000-18473 A

  However, the conventional strut reinforcement method has the following problems.

  That is, in the reinforcing method of the support column disclosed in the above publication, no consideration is given to obstacles such as ribs provided on the outer peripheral surface of the support column.

  Therefore, in order to cure the resin contained in the affixed carbon fiber reinforced prepreg, heat is transferred to the bottom of the column, the iron rib, or the ground when heated using a normal band heater or hot air generator, and the resin However, the resin cannot be uniformly heated, and the resin may be poorly cured.

  In particular, it is difficult to efficiently transfer heat around the obstacles such as ribs to cure the resin.

  An object of the present invention is to provide a strut capable of effectively curing a resin impregnated in a reinforcing fiber by uniformly heating the outer peripheral portion of the strut when reinforcing a strut including an obstacle such as a rib. It is to provide a reinforcing method and a heating system.

  A strut reinforcement method according to a first aspect of the present invention is a method of reinforcing an outer peripheral portion including an obstacle in a strut using a reinforcing fiber, including a reinforcing fiber arranging step, a heating member attaching step, and a soaking plate arrangement. A process and a curing process. In the reinforcing fiber arrangement step, the reinforcing fibers impregnated with uncured resin are arranged on the outer peripheral portion of the support column. A heating member attachment process attaches in the state which wound the strip | belt-shaped heating member around the outer peripheral surface of the reinforcing fiber. The soaking plate arrangement step has a thermal conductivity of 200 W / m · m so that it protrudes from the end of the heating member in accordance with the shape of the obstacle between the outer peripheral surface of the reinforcing fiber and the inner peripheral surface of the heating member. A heat equalizing plate that is not less than K and transmits heat applied from the heating member to the reinforcing fibers is disposed. In the curing step, a heating system that drives the heating member is driven, and heat is applied to the resin impregnated in the reinforcing fibers via a soaking plate to be cured.

  Here, for example, when reinforcing the resin impregnated in the reinforcing fiber to harden the resin impregnated in the reinforcing fiber in order to reinforce the outer peripheral part of the column in which obstacles such as ribs are arranged on the outer peripheral surface, the outer peripheral surface of the reinforcing fiber And a soaking plate that is provided between the reinforcing fiber and the heating member and transfers heat applied from the heating member to the resin. And the soaking | uniform-heating board is arrange | positioned so that it may protrude from the edge part of a heating member according to shapes, such as an obstruction provided in the support | pillar.

  Here, as a support | pillar used as reinforcement object, support | pillars, such as an illuminating lamp installed at the edge of a road, a traffic signal, are contained, for example. And as an obstacle in a support | pillar, the part etc. which protruded from the outer peripheral surface of the support | pillar, such as the rib provided in the lower end part of the support | pillar, the box-shaped part provided in the middle, are included.

  Moreover, as a heating member, the strip | belt-shaped band heater etc. which contain a nichrome wire (electric heating wire) inside can be used, for example.

  Moreover, as a reinforcing fiber used for reinforcement of a support | pillar, glass fiber, carbon fiber, an acrylic fiber etc. can be used, for example.

  Furthermore, as the resin impregnated in the reinforcing fiber, for example, a resin such as an epoxy resin, an acrylic resin, or an unsaturated polyester can be used.

  The soaking plate inserted between the outer peripheral surface of the reinforcing fiber and the inner peripheral surface of the heating member is, for example, a metal having a thermal conductivity of 200 W / m · K or more, such as copper or aluminum. The plate material can be used.

  As a result, heat is applied almost uniformly to the reinforcing fibers arranged on the outer peripheral surface of the column including obstacles such as ribs via the heat equalizing plate arranged so as to protrude from the end of the heating member. Thus, the resin impregnated in the reinforcing fiber can be cured.

  In other words, heat from the heating member is applied almost uniformly to the resin placed around the obstacle by a heat equalizing plate arranged so as to protrude from the end of the heating member according to the shape of the obstacle. can do.

  As a result, when reinforcing the struts containing obstacles such as ribs, the outer periphery of the struts is heated uniformly, effectively curing the resin impregnated in the reinforcing fibers, and causing problems such as poor curing. Can be suppressed.

  A strut reinforcement method according to a second invention is a strut reinforcement method according to the first invention, wherein in the heating member mounting step, the heating member is temporarily fixed using a temporary fixing tool, and then a fastening tool is used. The heating member is tightened in a state where the outer peripheral surface of the reinforcing fiber is wound.

  Here, when the heating member is attached to the outer peripheral surface of the reinforcing fiber attached to the reinforcing portion of the support column, the heating member is temporarily fixed using the temporary fixing tool, and then the heating member is tightened by the fastening tool.

  Here, as a temporary fixing tool, it has what is called an engagement part containing the lever member by which a ring-shaped member is rotatably supported, and a to-be-engaged part to which a ring-shaped member is latched, for example. Patchon tablets and the like can be used.

  Moreover, as a fastening tool, the screw etc. which can adjust the fastening force which fastens the outer peripheral surface of the reinforcement fiber by a heating member can be used, for example.

  Thus, in the heating member attaching step, the heating member is temporarily fixed to loosen the tightening force, so that in the heat equalizing plate arranging step, a predetermined gap between the outer peripheral surface of the reinforcing fiber and the inner peripheral surface of the heating member is obtained. A soaking plate can be inserted in the position.

  Therefore, according to the shape of the obstacle, the soaking plate is arranged at a desired position, and the heat applied from the heating member is effectively transmitted to the resin impregnated in the reinforcing fiber and cured. Can do.

  A strut reinforcement method according to a third aspect of the invention is a strut reinforcement method according to the second aspect of the present invention, wherein in the soaking plate arranging step, the soaking is provided between the outer peripheral surface of the reinforcing fiber and the inner peripheral surface of the heating member. After inserting the hot plate, the heating member is tightened toward the outer peripheral surface of the reinforcing fiber using a fastener.

  Here, in the soaking plate arranging step, after the soaking plate is inserted between the outer peripheral surface of the reinforcing fiber and the inner circumferential surface of the heating member, the tightening force is increased by the tightening tool.

  Thereby, after arrange | positioning a soaking | uniform-heating board according to the obstruction of a support | pillar, a heating member can be clamped with a clamp. Therefore, the heating member can be fastened and fixed in a state where the soaking plate is disposed at a desired position.

  A strut reinforcement method according to a fourth aspect of the present invention is the strut reinforcement method according to any one of the first to third aspects of the invention, wherein the strut outer peripheral surface or the reinforcing fiber is provided before the reinforcing fiber placement step. Is further provided with an adhesive application step of applying an adhesive to the inner peripheral surface.

  Here, an adhesive for adhering the outer peripheral surface of the support and the inner peripheral surface of the reinforcing fiber is applied as a pre-stage of arranging the reinforcing fiber on the outer peripheral surface of the support.

  Here, as the adhesive to be applied, for example, a resin such as epoxy having a viscosity that does not sag in the reinforcing fiber arranging step can be used.

  In addition, although the adhesive agent applied should just be applied to the shift | offset | difference of the outer peripheral surface of a support | pillar, and the internal peripheral surface of a reinforcement fiber, you may apply | coat to both surfaces.

  Thereby, when sticking a reinforcement fiber on the outer peripheral surface of a support | pillar, the adhesive force of an adhesive agent can be utilized.

  A strut reinforcement method according to a fifth invention is a strut reinforcement method according to any one of the first to fourth inventions, wherein the soaking plate has a larger area than the heating member. .

Here, a plate material having a larger area than the heating member is used as the soaking plate.
Here, the area of the soaking plate and the heating member means an area that abuts against the outer peripheral surface of the reinforcing fiber.

  Thereby, heat can be evenly transmitted to the surroundings of obstacles such as ribs that are difficult to apply heat evenly only by the heating member via the heat equalizing plate.

  A strut reinforcement method according to a sixth invention is a strut reinforcement method according to any one of the first to fifth inventions, wherein the heat equalizing plate is from a portion corresponding to a heat generating portion in the heating member. It extends even to a portion that does not correspond to the heat generation portion.

  Here, not only the position corresponding to the heat generation part in the heating member but also the soaking plate extended to the position not corresponding to the heat generation part is arranged.

  Here, the heat generation part in the heating member includes, for example, a part where a nichrome wire or the like built in the belt-like heating member is disposed.

  Thereby, heat can be evenly transmitted to the surroundings of obstacles such as ribs that are difficult to apply heat evenly only by the heating member via the heat equalizing plate.

  A strut reinforcement method according to a seventh invention is a strut reinforcement method according to any one of the first to sixth inventions, wherein the heat equalizing plate is adapted to the shape of the obstacle included in the strut. It has a notch formed.

  Here, the heat equalizing plate is provided with one or a plurality of notches formed in accordance with an obstacle such as a rib.

  Here, the notch means a processed portion of the heat equalizing plate formed along the shape of an obstacle such as a rib.

  Thereby, heat can be evenly transmitted to the surroundings of obstacles such as ribs that are difficult to apply heat evenly only by the heating member via the heat equalizing plate in which the cutout portions are formed.

  A strut reinforcement method according to an eighth invention is a strut reinforcement method according to any one of the first to seventh inventions, wherein the heating member is configured in a state that can be divided into a plurality of parts.

  Here, as the belt-shaped heating member, for example, a split structure that can be split when attached to a support column is adopted.

  Here, the heating member is wound around the outer peripheral surface of the reinforcing fiber in order to apply heat from the outer peripheral surface side of the reinforcing fiber disposed on the outer peripheral surface of the support column.

  At this time, when the belt-shaped heating member is configured as a single component, it may be difficult to wind the belt-shaped heating member around the outer peripheral surface of the reinforcing fiber.

  Thereby, a heating member can be easily mounted | worn with respect to the outer peripheral surface of a reinforcement fiber by employ | adopting the structure divided | segmented into plurality as a heating member.

  A heating system according to a ninth aspect of the present invention is a heating system that heats and cures an uncured resin impregnated in the reinforcing fiber when reinforcing the outer peripheral portion including the obstacle in the support using the reinforcing fiber. In addition, a heating member, a fixing portion, and a soaking plate are provided. The heating member generates heat. The fixing portion is fixed in a state where the heating member is wound around the outer peripheral surface of the support column. The soaking plate is disposed between the outer peripheral surface of the reinforcing fiber and the inner peripheral surface of the heating member, protrudes from the end of the heating member in accordance with the shape of the obstacle, and has a thermal conductivity of 200 W / m · K. The heat applied from the heating member is transmitted to the reinforcing fiber.

  Here, for example, in order to reinforce the outer peripheral portion of the support column in which obstacles such as ribs are arranged on the outer peripheral surface, in a heating system used for applying heat to the resin impregnated in the reinforcing fiber and curing it, A heating member wound around the outer peripheral surface of the reinforcing fiber, and a soaking plate provided between the reinforcing fiber and the heating member and transmitting heat applied from the heating member to the resin are used. And the soaking | uniform-heating board is arrange | positioned so that it may protrude from the edge part of a heating member according to shapes, such as an obstruction provided in the support | pillar.

  Here, as a support | pillar used as reinforcement object, support | pillars, such as an illuminating lamp installed at the edge of a road, a traffic signal, are contained, for example. And as an obstacle in a support | pillar, the part etc. which protruded from the outer peripheral surface of the support | pillar, such as the rib provided in the lower end part of the support | pillar, the box-shaped part provided in the middle, are included.

  Moreover, as a heating member, the strip | belt-shaped band heater etc. which contain a nichrome wire inside can be used, for example.

  Moreover, as a reinforcing fiber used for reinforcement of a support | pillar, glass fiber, carbon fiber, an acrylic fiber etc. can be used, for example.

  Furthermore, as the resin impregnated in the reinforcing fiber, for example, a resin such as an epoxy resin, an acrylic resin, or an unsaturated polyester can be used.

  The soaking plate inserted between the outer peripheral surface of the reinforcing fiber and the inner peripheral surface of the heating member is, for example, a metal having a thermal conductivity of 200 W / m · K or more, such as copper or aluminum. The plate material can be used.

  As a result, heat is applied almost uniformly to the reinforcing fibers arranged on the outer peripheral surface of the column including obstacles such as ribs via the heat equalizing plate arranged so as to protrude from the end of the heating member. Thus, the resin impregnated in the reinforcing fiber can be cured.

  In other words, heat from the heating member is applied almost uniformly to the resin placed around the obstacle by a heat equalizing plate arranged so as to protrude from the end of the heating member according to the shape of the obstacle. can do.

  As a result, when reinforcing the struts containing obstacles such as ribs, the outer periphery of the struts is heated uniformly, effectively curing the resin impregnated in the reinforcing fibers, and causing problems such as poor curing. Can be suppressed.

  A heating system according to a tenth invention is the heating system according to the ninth invention, wherein the soaking plate has a larger area than the heating member.

Here, a plate material having a larger area than the heating member is used as the soaking plate.
Here, the area of the soaking plate and the heating member means an area that abuts against the outer peripheral surface of the reinforcing fiber.

  Thereby, heat can be evenly transmitted to the surroundings of obstacles such as ribs that are difficult to apply heat evenly only by the heating member via the heat equalizing plate.

  A heating system according to an eleventh aspect of the invention is the heating system according to the ninth or tenth aspect of the invention, wherein the soaking plate is changed from a part corresponding to the heat generation part in the heating member to a part not corresponding to the heat generation part. It is extended to.

  Here, not only the position corresponding to the heat generation part in the heating member but also the soaking plate extended to the position not corresponding to the heat generation part is arranged.

  Here, the heat generation part in the heating member includes, for example, a part where a nichrome wire or the like built in the belt-like heating member is disposed.

  Thereby, heat can be evenly transmitted to the surroundings of obstacles such as ribs that are difficult to apply heat evenly only by the heating member via the heat equalizing plate.

  A heating system according to a twelfth aspect of the present invention is the heating system according to any one of the ninth to eleventh aspects of the present invention, wherein the heat equalizing plate is formed in accordance with the shape of the obstacle included in the support column. Has a notch.

  Here, the heat equalizing plate is provided with one or a plurality of notches formed in accordance with an obstacle such as a rib.

  Here, the notch means a processed portion of the heat equalizing plate formed along the shape of an obstacle such as a rib.

  Thereby, heat can be evenly transmitted to the surroundings of obstacles such as ribs that are difficult to apply heat evenly only by the heating member via the heat equalizing plate in which the cutout portions are formed.

  A heating system according to a thirteenth aspect of the present invention is the heating system according to any one of the ninth to twelfth aspects of the present invention, wherein the heating member is configured to be divided into a plurality of parts.

  Here, as the belt-shaped heating member, for example, a split structure that can be split when attached to a support column is adopted.

  Here, the heating member is wound around the outer peripheral surface of the reinforcing fiber in order to apply heat from the outer peripheral surface side of the reinforcing fiber disposed on the outer peripheral surface of the support column.

  At this time, when the belt-shaped heating member is configured as a single component, it may be difficult to wind the belt-shaped heating member around the outer peripheral surface of the reinforcing fiber.

  Thereby, a heating member can be easily mounted | worn with respect to the outer peripheral surface of a reinforcement fiber by employ | adopting the structure divided | segmented into plurality as a heating member.

  A heating system according to a fourteenth aspect of the present invention is the heating system according to any one of the ninth to thirteenth aspects of the present invention, wherein the fixing part is a temporary fixing tool that temporarily fixes the heating member on the outer peripheral surface of the reinforcing fiber. And a fastening tool for fastening the heating member temporarily fixed by the temporary fixing tool toward the outer peripheral surface of the reinforcing fiber.

  Here, as a fixing part for attaching the heating member in a state of being wound around the outer peripheral surface of the reinforcing fiber, a temporary fixing tool for temporarily fixing the heating member, and a fastening tool for fastening the temporarily fixed heating member to the inner diameter side; Is used.

  Here, as a temporary fixing tool, it has what is called an engagement part containing the lever member by which a ring-shaped member is rotatably supported, and a to-be-engaged part to which a ring-shaped member is latched, for example. Patchon tablets and the like can be used.

  Moreover, as a fastening tool, the screw etc. which can adjust the fastening force which fastens the outer peripheral surface of the reinforcement fiber by a heating member can be used, for example.

  Thus, when the heating member is attached, the heating member is temporarily fixed to loosen the tightening force, so that in the step of arranging the heat equalizing plate, between the outer peripheral surface of the reinforcing fiber and the inner peripheral surface of the heating member. A soaking plate can be inserted at a predetermined position. And after inserting a soaking | uniform-heating board, a heating member can be fastened toward the outer peripheral surface of a reinforcement fiber using a fastener.

  Therefore, according to the shape of the obstacle, the soaking plate is arranged at a desired position, and the heat applied from the heating member is effectively transmitted to the resin impregnated in the reinforcing fiber and cured. Can do.

  According to the strut reinforcement method of the present invention, when reinforcing a strut including an obstacle such as a rib, the outer peripheral portion of the strut is uniformly heated to effectively cure the resin impregnated in the reinforcing fiber. be able to.

The perspective view which shows the structure of the support | pillar reinforced by the reinforcement method of the support | pillar which concerns on one Embodiment of this invention. The side view which shows the state in which the support | pillar of FIG. 1 was installed in the ground. The side view which shows the structure of the heating system attached to the support | pillar in order to heat the resin impregnated in the reinforcing fiber which reinforces the support | pillar of FIG. FIG. 4 is a plan view of the heating system of FIG. 3. FIG. 4 is a cross-sectional view taken along line AA showing the configuration of the heating system in FIG. 3. The side view which shows the heating system of FIG. The side view which shows the structure of the fixed band contained in the heating system of FIG. The side view which shows the structure of the heating member contained in the heating system of FIG. The side view which shows the structure of the heat equalizing plate contained in the heating system of FIG. The flowchart which shows the flow of the reinforcement method of the support | pillar which concerns on one Embodiment of this invention.

  A strut reinforcement method and a heating system 10 according to an embodiment of the present invention will be described below with reference to FIGS.

  The support | pillar reinforcement method which concerns on this embodiment is a method for reinforcing the predetermined location in the support | pillar 50 shown in FIG. 1, Comprising: It implements using the heating system 10 mentioned later.

(Structure of the column 50 to be reinforced)
The column 50 to be reinforced in the present embodiment is a tubular or columnar structure, such as a column structure such as an illumination column and a sign column. As shown in FIG. 1, the support column 50 includes a cylindrical tube column part 51, four ribs 52, and a base part 53. As shown in FIG. 2, the support column 50 is erected in a state where the lower end portion including the rib 52 and the base portion 53 is buried in soil or asphalt.

  In addition, the support | pillar 50 reinforced may be an existing thing, and may be newly provided. Further, when the reinforcement target is the existing support column 50, the outer peripheral surface or the like may have already deteriorated.

  When the existing support 50 is to be reinforced, the reinforcement process is performed by digging up soil or the like covering the lower portion of the support 50 embedded in the ground.

  Although it does not specifically limit as a material of the support | pillar 50, A metal, resin, mortar hardened | cured material, etc. are mentioned.

  The cross-sectional shape of the column 50 is not particularly limited, and includes, for example, any shape including a circle and a polygon. Further, the support column 50 may have a solid structure or a hollow structure.

  In the present embodiment, the reinforcing structure of the support column 50 is impregnated with a resin, which will be described later, on the entire periphery of the outer peripheral surface 51a of the tube column portion 51 in the vicinity of the lower end portion buried in the soil in the longitudinal direction of the support column 50. It is configured by being covered with the reinforcing fiber 20.

  As shown in FIG. 1, the tube column portion 51 is a cylindrical structure formed of metal or the like, and four ribs 52 are joined to the lower end portion of the outer peripheral surface 51a by welding. Moreover, the base part 53 is joined to the lower end of the pipe column part 51 by welding.

  Moreover, as shown in FIG. 2, the pipe column part 51 has the lower end part including the rib 52 and the base part 53 buried in the ground.

  As shown in FIG. 1, the four ribs 52 are provided at intervals of about 90 degrees in the circumferential direction so as to protrude along a direction substantially perpendicular to the outer peripheral surface 51 a of the tube column part 51. The four ribs 52 are joined to the base portion 53 and the outer peripheral surface 51a of the tube column portion 51 by welding.

  Here, these four ribs 52 become obstacles when affixing and fixing a reinforcing fiber 20 described later.

  Further, as shown in FIG. 2, the four ribs 52 are buried in the ground in a state where the support columns 50 are installed.

  In addition, about the number of ribs 52, an installation space | interval, etc., it is not limited to four and 90 degree | times intervals, For example, you may provide by six, 60 degree | times intervals, etc.

  As shown in FIG. 1, the base portion 53 is a base plate that supports the column 50 at the lower end portion thereof, and is arranged along a direction substantially perpendicular to the axial direction of the tube column portion 51.

  As shown in FIG. 2, the base portion 53 is embedded in the ground together with the ribs 52 in a state where the support column 50 is installed.

  And in the reinforcement method of the support | pillar 50 of this embodiment, the resin which wound the reinforcement fiber 20 around the part corresponding to the ground GL shown in FIG. The support 50 is reinforced by curing.

  In addition, since the periphery of the part corresponding to the ground GL of the outer peripheral surface 51a of the pipe column part 51 in the embedded state and the periphery of the rib 52 embedded in the ground are easily deteriorated, the following reinforcement method using the heating system 10 is used. Reinforced.

(Configuration of heating system 10)
The heating system 10 of the present embodiment is used in the reinforcing method of the main column 50 in order to reinforce a predetermined portion in the column 50, and is impregnated into the reinforcing fiber 20 wound around the outer peripheral surface 51a of the tube column part 51. The uncured matrix resin is heated and cured.

  More specifically, as shown in FIG. 3, the heating system 10 is a portion in which a rib 52 embedded in the ground is provided from a portion corresponding to the ground GL in the outer peripheral surface 51 a of the tube column portion 51 in the embedded state. The matrix resin impregnated in the reinforcing fiber 20 wound around is heated.

  In this embodiment, in particular, the matrix resin impregnated in the reinforcing fiber 20 provided to reinforce the portion provided with the obstacle such as the rib 52 on the outer peripheral surface 51a of the support column 50 is effectively heated and cured. In order to achieve this, the following configuration is provided.

  As the matrix resin impregnated in the reinforcing fiber 20, epoxy resin, dicyandiamide (DICY-7), 2-phenyl-4,5-dihydroxymethylimidazole 2PHZ-PW, polymethacrylate organic fine particles may be used. it can.

Further, the reinforcing fiber 20 includes glass fiber as a fiber material.
As shown in FIGS. 3 and 4, the heating system 10 includes a fixed band (fixed portion) 11, a square pipe 12, a band heater (heating member) 13, and a soaking plate 14.

(Fixed band 11)
The fixing band (fixing portion) 11 is a cylindrical fixing member and has a split structure that can be split into two parts. And the fixed band 11 is arrange | positioned at the outermost periphery side of the heating system 10, in order to fix the band heater 13 etc. which are arrange | positioned at the inner peripheral side. As shown in FIGS. 5 and 6, the fixing band 11 has a patch-on lock (temporary fastener) 11 a and a tightening screw (fastening tool) 11 b on the belt-shaped outer peripheral surface.

  As shown in FIG. 3, two patchon locks 11 a are provided along the longitudinal direction of the support column 50 in order to temporarily fix the fixing band 11 to the outer peripheral surface of the reinforcing fiber 20. The patch lock 11a includes an engaging portion including a lever member on which a ring-shaped member is rotatably supported, and an engaged portion on which the ring-shaped member is locked.

  Thereby, one end of the fixing band 11 divided into two can be easily connected by engaging the ring-shaped member with the engaged portion and rotating the lever member.

  Since the patch and lock 11a has a general structure, detailed description thereof is omitted here.

  As shown in FIGS. 3 and 7, two tightening screws 11 b are provided along the longitudinal direction of the support column 50 on the opposite side of the outer peripheral surface of the fixed band 11 from the patch-on lock 11 a. Then, the tightening screw 11b is rotated in a screwed state to adjust the clearance in the circumferential direction of the fixing band 11 divided into two in the circumferential direction.

  Thereby, the inner diameter of the fixed band 11 temporarily fixed by the patchon lock 11 a can be adjusted, and the band heater 13 can be tightened by the fixed band 11.

(Square pipe 12)
As shown in FIG. 4, the square pipe 12 is a substantially square hollow pipe in a sectional view, and is joined to the inner peripheral surface of the fixed band 11 by welding. The square pipe 12 is between the outer peripheral surface of the band heater 13 wound around the outer peripheral surface of the reinforcing fiber 20 attached to the reinforcing portion of the outer peripheral surface 51 a of the support column 50 and the inner peripheral surface of the fixed band 11. In order to avoid the ribs 52, four are provided at intervals of 90 degrees in the circumferential direction.

  As a result, when the tightening screw 11 b of the fixed band 11 is rotated and tightened, the band heater 13 is pressed from the four locations on the outer peripheral surface to the inner diameter side via the square pipe 12.

  As shown in FIGS. 3 and 6, the four square pipes 12 are longer in the longitudinal direction of the support column 50 than the fixed band 11 and have a length substantially equal to the length of the band heater 13. Have.

  Thereby, even if the length of the fixed band 11 in the longitudinal direction of the support column 50 is shorter than the length of the band heater 13 by tightening with the fixed band 11 from the outer peripheral side via the four square pipes 12, The fastening force of the fixing band 11 can be sufficiently transmitted to the lower part of the reinforcing fiber 20 while avoiding the portion.

  As a result, the band heater 13 can be entirely pressed from the outer peripheral surface side of the reinforcing fiber 20 toward the inner diameter side.

(Band heater 13)
The band heater (heating member) 13 is a belt-like member including a heat generating portion such as a nichrome wire inside, and is wound around the outer peripheral surface of the reinforcing fiber 20 as shown in FIG. The band heater 13 heats and cures the matrix resin impregnated in the reinforcing fibers 20 while being wound around the outer peripheral surface of the reinforcing fibers 20.

  The band heater 13 has a structure divided into two in the circumferential direction of the support column 50, and is attached so as to cover the reinforcing portion of the outer peripheral surface 51a of the support column 50 with an adhesive.

  Moreover, the band heater 13 has the protrusion part 13a, the notch part 13b, and the lead wire 13c, as shown in FIG.

  As shown in FIG. 3, the protruding portion 13a extends from the vicinity of the ground GL in the embedded state to the periphery of the connecting portion with the rib 52 on the outer peripheral surface 51a, avoiding the rib 52 portion. It is provided on both sides of the portion 13b. And the protrusion 13a has the same length as the rib 52 in the longitudinal direction of the column 50 in order to heat the reinforcing fiber 20 wound around the outer peripheral surface 51a of the column 50 corresponding to the length of the rib 52. have.

  As shown in FIG. 3, four notches 13 b are formed between the protruding portions 13 a so as to avoid the ribs 52 provided at the lower end of the support column 50. Moreover, the notch part 13b has the length equivalent to the rib 52 in the longitudinal direction of the support | pillar 50 similarly to the protrusion part 13a.

  As shown in FIGS. 5 and 6, the lead wire 13 c is connected to an electrode portion provided on the outer peripheral surface of the band heater 13 in order to supply a current to a heating portion such as a nichrome wire in the band heater 13. It is led out to the outside of the fixed band 11.

(Soaking plate 14)
The soaking plate 14 is formed using a copper plate material having a thickness t of 0.3 mm and a thermal conductivity of 372 W / m · K. The soaking plate 14 transmits the heat generated in the band heater 13 to the matrix resin impregnated in the reinforcing fibers 20, as shown in FIG. It is provided between the outer peripheral surfaces of the reinforcing fibers 20.

  Moreover, the soaking plate 14 has the protrusion part 14a and the notch part 14b, as shown in FIG.

  Similar to the protrusion 13a of the band heater 13, the protrusion 14a avoids the portion of the rib 52 from the vicinity of the ground GL in the embedded state, and is a portion of the connection portion with the rib 52 on the outer peripheral surface 51a. It is the part extended to the periphery, Comprising: It provided in the both sides of the notch part 14b. And the protrusion part 14a is the length equivalent to the rib 52 in the longitudinal direction of the support | pillar 50 in order to heat the reinforcement fiber 20 wound by the part of the outer peripheral surface 51a of the support | pillar 50 corresponded to the length of the rib 52. have.

  As with the notch 13b of the band heater 13, four notches 14b are provided between the protrusions 14a so as to avoid the rib 52 provided at the lower end of the support 50 as shown in FIG. Is formed. Moreover, the notch part 14b has the length equivalent to the rib 52 in the longitudinal direction of the support | pillar 50 similarly to the protrusion part 14a.

  As shown in FIGS. 3 and 6, the soaking plate 14 is larger in the longitudinal direction of the support column 50 than the band heater 13 on the outer peripheral surface of the reinforcing fiber 20 in a side view. Specifically, the soaking plate 14 is provided with a protruding portion 14 a so as to protrude about 10 mm from the end of the band heater 13 in the longitudinal direction of the support column 50.

  Furthermore, as shown in FIG. 4, the soaking plate 14 is larger in the circumferential direction than the band heater 13 around the rib 52 on the outer peripheral surface of the reinforcing fiber 20 in a top view. Specifically, the soaking plate 14 is provided with protruding portions 14a so as to protrude about 10 mm from both ends of the band heater 13 in the circumferential direction.

  That is, the soaking plate 14 is disposed from a portion of the band heater 13 that is disposed to face the heating portion to a portion that does not have the heating portion.

  Accordingly, as shown in FIG. 6, the soaking plate 14 protrudes from the both ends and the lower end in the circumferential direction by about 10 mm in the vicinity of the rib 52, and has a larger area than the band heater 13.

  Here, in order to apply heat to the reinforcing fibers 20 disposed in the vicinity of the ribs 52, it is also conceivable to dispose the band heater 13 in proximity to the ribs 52. However, such a configuration is not preferable because there is a risk that the band heater 52 directly contacts the rib 52.

  Therefore, in the present embodiment, the soaking plate 14 that protrudes to the vicinity of the rib 52 is used instead of the band heater 13.

  As a result, the heat equalizing plate having an area larger than that of the band heater 13 even in a region where the band heater 13 is not provided, such as in the vicinity of a connection portion with the rib 52 on the outer peripheral surface of the reinforcing fiber 20. 14 can be heated.

<Reinforcing method of support 50>
As described above, the method for reinforcing the support 50 according to the present embodiment is performed according to the flowchart shown in FIG. 10 in order to reinforce a predetermined portion of the support 50.

  Specifically, in the reinforcing method of the support column 50 of the present embodiment, heat is applied to the uncured matrix resin impregnated in the reinforcing fiber 20 wound around the outer peripheral surface 51a of the tube column part 51 to be cured. The strut 50 is reinforced.

  First, in step S1, adhesion for attaching the reinforcing fiber 20 to the outer peripheral surface 51a of the support column 50 on the inner peripheral surface side (the outer peripheral surface 51a side of the support column 50) of the reinforcing fiber 20 impregnated with the uncured matrix resin. The agent is applied.

Moreover, as an adhesive agent, a normal temperature hardening epoxy resin-type adhesive agent (Esdaine Joiner WG) can be used, for example. And the application quantity is 1,600 g / m < ² >, for example.

  Next, in step S <b> 2, the reinforcing fiber 20 to which the adhesive is applied is attached to the reinforcing portion on the outer peripheral surface 51 a of the support column 50.

  In this embodiment, the range including the joint portion with the four ribs 52 protruding from the outer peripheral surface 51a is reinforced from the portion corresponding to the ground GL (see FIG. 2) on the outer peripheral surface 51a of the support column 50. Therefore, the reinforcing fiber 20 is notched and processed according to the shape of the rib 52, and is disposed on the outer peripheral surface 51a.

  Next, in step S <b> 3, a silicon release sheet (not shown) is attached to the outer peripheral surface of the reinforcing fiber 20 wound around the outer peripheral surface 51 a of the support column 50.

  The release sheet is cured so that the outer peripheral surface of the reinforcing fiber 20 and the inner peripheral surface of the band heater 13 are not bonded after the matrix resin impregnated in the reinforcing fiber 20 is cured using the band heater 13 described later. Used to do.

  Next, in step S <b> 4, the band heater 13 is temporarily fixed to the outer peripheral surface of the reinforcing fiber 20 using the patch lock 11 a and the fastening screw 11 b provided on the fixing band 11 of the heating system 10.

  Specifically, the band heater 13 is placed in contact with the outer peripheral surface of the reinforcing fiber 20, and the square pipe 12 welded and bonded to four locations on the inner peripheral surface of the fixed band 11 is brought into contact with the outer peripheral surface side of the band heater 13. In this state, the fixing band 11 is temporarily fixed.

  When the fixing band 11 is temporarily fixed, the patching lock 11a is first locked and fixed in a state where the fixing band 11 is wound, and then the tightening screw 11b is loosely tightened.

  In the heating system 10 of the present embodiment, the band heater 13 is attached with a soaking plate 14 having an area larger than that of the band heater 13 on the inner peripheral surface side contacting the outer peripheral surface of the reinforcing fiber 20 via the release sheet. It has been.

  And the band heater 13 and the soaking | uniform-heating board 14 have the notch part 13b and the notch part 14b, respectively so that the part of the rib 52 provided in the support | pillar 50 may be avoided.

  Since the soaking plate 14 has a larger area than the band heater 13, it is provided between the outer peripheral surface of the reinforcing fiber 20 and the inner peripheral surface of the band heater 13 in a state of protruding from the end of the band heater 13.

  In the present embodiment, the band heater 13 is a two-piece heater in which a cylindrical member is divided into two, and as described above, the notch portion 13b is formed so as to avoid the rib 52 portion of the support column 50. Is formed.

  The soaking plate 14 is a copper plate member having a thickness t of 0.3 mm and a thermal conductivity of 372 W / m · K, and has a size that protrudes from the end of the band heater 13 by about 10 mm. doing.

  Next, in step S5, the fastening screw 11b of the fixed band 11 is tightened, and the band heater 13 is tightened toward the reinforcing fiber 20 arranged on the inner peripheral surface side. The tightening torque of the tightening screw is about 0.5 to 1.5 N · m.

  Next, in step S6, the band heater 13 is heated until it reaches a predetermined temperature. In the present embodiment, the band heater 13 is controlled to be heated so as to be maintained in the range of 150 to 180 ° C.

  At this time, the surface temperature of the reinforcing fiber 20 is measured and heated by the band heater 13 until the surface temperature of the reinforcing fiber 20 disposed in the vicinity of the rib 52 exceeds 130 ° C.

  Next, in step S7, after the band heater 13 is heated to a predetermined temperature, the heating is continued until a predetermined time elapses. In the present embodiment, the predetermined time is set to 10 minutes.

  Thereby, the reinforcing fiber 20 heated for a predetermined time is effectively heated in a state where the band heater 13 and the soaking plate 14 are arranged so as to avoid the rib 52 portion of the support column 50. For this reason, the reinforcing fiber 20 is cured by applying sufficient heat to the notch portion formed so as to avoid the rib 52.

  As a result, in the support column 50 having an obstacle such as the rib 52 on the outer peripheral surface 51a, it is possible to suppress the occurrence of poor curing of the matrix resin of the reinforcing fiber 20 provided in the vicinity of the rib 52.

  Next, in Step S8, after loosening the fastening screw 11b of the fixing band 11 and removing the fixing band 11, the band heater 13 and the release sheet are removed from the outer peripheral surface of the reinforcing fiber 20.

  According to the reinforcing method of the support column 50 of the present embodiment, the heat equalization disposed so as to protrude from the end of the band heater 13 with respect to the reinforcing fiber 20 disposed in the vicinity of the rib 52 so as to avoid the rib 52. Heat can be applied almost uniformly through the plate 14.

  Therefore, the entire matrix resin impregnated in the reinforcing fiber 20 can be effectively cured.

  In other words, the band heater 13 formed in accordance with the shape of the rib 52 and the heat equalizing plate 14 larger than the band heater 13 ensure that the matrix resin impregnated in the reinforcing fibers 20 arranged around the rib 52 is against the matrix resin. Heat can be applied to the.

  As a result, when reinforcing a portion including an obstacle such as the rib 52 in the support column 50, it is possible to suppress the occurrence of problems such as poor curing of the matrix resin impregnated in the reinforcing fiber 20 around the rib 52.

  Furthermore, according to the reinforcing method of the support column 50 of the present embodiment, the shape of the soaking plate 14 is changed to an obstacle such as the rib 52 without changing the shape of the band heater 13 at the site where the reinforcing work is performed. By forming according to the above, the above-mentioned effect can be obtained.

[Other Embodiments]
As mentioned above, although one Embodiment of this invention was described, this invention is not limited to the said embodiment, A various change is possible in the range which does not deviate from the summary of invention.

(A)
In the above-described embodiment, the example in which the band heater 13 in which the heat equalizing plate 14 has been attached to the inner peripheral surface side in advance in step S4 is temporarily fixed to the outer peripheral surface of the reinforcing fiber 20 has been described. However, the present invention is not limited to this.

  For example, after temporarily fixing the band heater (heating member) to the outer peripheral surface of the reinforcing fiber, a soaking plate may be inserted between the inner peripheral surface of the band heater and the outer peripheral surface of the reinforcing fiber.

  That is, the installation of the band heater and the installation of the soaking plate may be performed in separate steps.

  Even in this case, the same effect as described above can be obtained by heating the matrix resin impregnated in the reinforcing fibers through the heat equalizing plate protruding from the end of the band heater.

(B)
In the said embodiment, the band heater 13 was temporarily fixed to the outer peripheral surface of the reinforcing fiber 20, and the process to clamp | tighten was mentioned and demonstrated the example which implements using the Patchon lock 11a and the clamping screw 11b as a temporary fixing tool. However, the present invention is not limited to this.

  For example, the band heater may be fixed using other fixing members in addition to the combination of the patch and lock screw.

(C)
In the above embodiment, when the reinforcing fiber 20 is disposed on the outer peripheral surface 51a of the support 50, an adhesive is applied to the inner peripheral surface of the reinforcing fiber 20, and the reinforcing fiber 20 is attached to the support using the adhesive force of the adhesive. An example of fixing to 50 reinforcing points has been described. However, the present invention is not limited to this.

  For example, the reinforcing fiber may be fixed to the outer peripheral surface of the support column by curing the matrix resin impregnated in the reinforcing fiber without using an adhesive.

  Further, even when an adhesive is used, it may be applied to the outer peripheral surface side of the support column instead of the inner peripheral surface side of the reinforcing fiber. Or you may apply | coat an adhesive agent to both the internal peripheral surface of a reinforcement fiber, and the outer peripheral surface of a support | pillar.

(D)
In the above-described embodiment, an example in which a copper plate material is used as the soaking plate 14 has been described. However, the present invention is not limited to this.

  For example, as long as the metal has a high thermal conductivity of 200 W / m · K or more, a soaking plate formed of another metal such as aluminum may be used in addition to copper.

(E)
In the above embodiment, an example in which the band heater 13 is fastened using four square pipes 12 welded to the inner peripheral surface side of the fixed band 11 has been described. However, the present invention is not limited to this.

  For example, the number of square pipes provided on the inner peripheral surface side of the fixed band is not limited to four, and may be other numbers such as six or eight.

  In addition, the use of the square pipe is not essential in the present invention, and other members that can fasten the band heater near the obstacle such as a rib to the inside in the radial direction without using the square pipe may be used.

(F)
In the embodiment described above, an example in which four ribs 52 are provided as an obstacle during reinforcement on the outer peripheral surface 51a of the support column 50 has been described. However, the present invention is not limited to this.

  For example, the number of ribs provided on the outer peripheral surface of the support column is not limited to four, and may be other numbers such as five, six, eight, and the like.

  In this case, the band heater (heating member) and the notch portions of the heat equalizing plate may be formed according to the number of ribs.

  In addition to ribs, the present invention can also be applied to reinforcement of pillars provided with obstacles such as box-like parts provided in the middle of the pillars and parts protruding from the outer peripheral surface of the pillars. It is.

  Even in this case, the same effect as described above can be obtained by forming the band heater (heating member) and the notch portions of the heat equalizing plate in accordance with the shape and number of obstacles.

(G)
In the above embodiment, an example in which an epoxy resin is used as the matrix resin impregnated in the reinforcing fiber 20 has been described. However, the present invention is not limited to this.

  For example, other thermosetting resins such as unsaturated polyester, acrylic resin, vinyl ester resin, alkyd resin, amino resin, urethane resin, phenol resin, and silicon resin may be used.

(H)
In the said embodiment, the example which used glass fiber as the fiber raw material contained in the reinforcing fiber 20 was given and demonstrated. However, the present invention is not limited to this.

  For example, the fiber material included in the reinforcing fiber is not limited to glass fiber, for example, metal fiber and other inorganic fibers; carbon fiber, aramid fiber, polyvinyl alcohol fiber, vinyl chloride fiber, acrylic fiber, polyester fiber, Polyurethane fiber, polyethylene fiber, polypropylene fiber, polystyrene fiber, acetate fiber and other organic synthetic fibers; hemp and bamboo and other natural fibers; rayon and other regenerated fibers may be used.

  Moreover, as for the fiber material contained in the reinforcement fiber mentioned above, one type of fiber material may be used independently, and a plurality of types of fiber materials may be used in combination.

  The method of reinforcing a column according to the present invention can effectively cure the resin impregnated in the reinforcing fiber by uniformly heating the outer periphery of the column when reinforcing the column including an obstacle such as a rib. Therefore, the present invention can be widely applied to a method for reinforcing various pillars such as lighting pillars and sign pillars, which are road accessories.

10 Heating system 11 Fixed band (fixed part)
11a Patchon lock (temporary fastener)
11b Clamping screw (clamp)
12 square pipe 13 band heater (heating member)
13a Protruding part 13b Notch part 13c Lead wire 14 Heat equalizing plate 14a Protruding part 14b Notch part 20 Reinforcing fiber 50 Column 51 Pipe column part 51a Outer peripheral surface 52 Rib (obstacle)
53 Foundation GL Ground (ground level)
S step

Claims (14)

A method of reinforcing an outer peripheral portion including an obstacle in a support using a reinforcing fiber,
Reinforcing fiber placement step of placing reinforcing fibers impregnated with uncured resin on the outer peripheral portion of the struts;
A heating member attaching step for attaching the belt-shaped heating member in a state of being wound around the outer peripheral surface of the reinforcing fiber;
Between the outer peripheral surface of the reinforcing fiber and the inner peripheral surface of the heating member, the thermal conductivity is 200 W / m · K or more so as to protrude from the end of the heating member in accordance with the shape of the obstacle. A soaking plate placement step of placing a soaking plate that transmits heat applied from the heating member to the reinforcing fibers;
A curing step of driving a heating system that drives the heating member, and applying heat to the resin impregnated in the reinforcing fibers via the heat equalizing plate;
Reinforcing method of the strut equipped with. In the heating member mounting step, after temporarily fixing the heating member using a temporary fixing tool, the heating member is tightened in a state where the outer peripheral surface of the reinforcing fiber is wound using a fastener.
The strut reinforcement method according to claim 1. In the soaking plate arranging step, after inserting the soaking plate between the outer peripheral surface of the reinforcing fiber and the inner peripheral surface of the heating member, the heating member is placed on the outer periphery of the reinforcing fiber using the fastener. Tighten towards the surface,
The strut reinforcement method according to claim 2. Before the reinforcing fiber placement step, further comprising an adhesive application step of applying an adhesive to the outer peripheral surface of the support column or the inner peripheral surface of the reinforcing fiber,
The strut reinforcement method according to any one of claims 1 to 3. The soaking plate has a larger area than the heating member,
The strut reinforcement method according to any one of claims 1 to 4. The soaking plate extends from a portion corresponding to the heat generating portion in the heating member to a portion not corresponding to the heat generating portion.
The strut reinforcement method according to any one of claims 1 to 5. The soaking plate has a plurality of notches formed in accordance with the shape of the obstacle included in the support column,
The strut reinforcement method according to any one of claims 1 to 6. The heating member is configured in a state that can be divided into a plurality of parts,
The strut reinforcement method according to any one of claims 1 to 7. A heating system that heats and cures an uncured resin impregnated in the reinforcing fiber when reinforcing the outer peripheral portion including the obstacle in the support column with the reinforcing fiber,
A heating member that generates heat;
A fixing part for fixing the heating member in a state wound around the outer peripheral surface of the support;
It is arranged between the outer peripheral surface of the reinforcing fiber and the inner peripheral surface of the heating member, protrudes from the end of the heating member in accordance with the shape of the obstacle, and has a thermal conductivity of 200 W / m · K or more. And a heat equalizing plate for transferring heat applied from the heating member to the reinforcing fibers;
With heating system. The soaking plate has a larger area than the heating member,
The heating system according to claim 9. The soaking plate extends from a portion corresponding to the heat generating portion in the heating member to a portion not corresponding to the heat generating portion.
The heating system according to claim 9 or 10. The soaking plate has a plurality of notches formed in accordance with the shape of the obstacle included in the support column,
The heating system according to any one of claims 9 to 11. The heating member is configured in a state that can be divided into a plurality of parts,
The heating system according to any one of claims 9 to 12. The fixing portion tightens the heating member temporarily fixed on the outer peripheral surface of the reinforcing fiber and the heating member temporarily fixed by the temporary fixing member toward the outer peripheral surface of the reinforcing fiber. A fastening tool,
The heating system according to any one of claims 9 to 13.

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