JP7271816B1 - Water stoppage treatment method for handrail and handrail structure - Google Patents

Abstract

A handrail water stoppage treatment method and a handrail structure that can prevent water from entering or moving inside a handrail column and can be easily constructed. A handrail 10 in which a plurality of cylindrical metal pillars 11 are erected at intervals and fixed to a concrete structure 12 at the lower end side, and a coping 13 is fixed to the upper end of the plurality of pillars 11. In this water stoppage treatment method, a foaming liquid 22a is injected into the hollow portion 21 from the upper end side of the support 11 to foam and harden, so that the foam 22 impervious to water is adhered to the inner surface of the support 11. The hollow portion 21 is filled from the bottom to the upper end side to prevent water from entering the column. [Selection drawing] Fig. 6

Description

TECHNICAL FIELD The present invention relates to a handrail waterproof treatment method and a handrail structure.

Handrails installed in various buildings consist of a plurality of cylindrical metal pillars erected at intervals, fixed to a concrete structure at the lower end, and a top rail fixed to the upper end of the pillars. structure. Many handrails use extruded aluminum with an anodized outer surface as the posts, which are reinforced by steel reinforcements that are fixed to the concrete structure and inserted inside the posts.

In recent years, water that has entered from handrail joints and water that has formed due to condensation accumulates inside the pillars of the handrail, corroding the stanchions and reinforcing materials from the inside, and the accumulated water penetrates into the concrete structures that secure the stanchions. It has become clear that the concrete deteriorates as a result. Therefore, a repair method for draining the water accumulated inside the column has been proposed.

For example, in Patent Literatures 1 and 2, water drainage holes are provided in the root portion of the pillar or in the concrete structure to remove accumulated water, and the root portion of the pillar is filled with a hardening resin or cement material. there is
In Patent Document 3, drainage and filling are performed simultaneously by providing a water discharge hole at the bottom of a column and an air hole at the top, and injecting a filler having a higher specific gravity than water into the bottom of the column.

Japanese Patent No. 3743721 Japanese Patent No. 3929386 Japanese Patent No. 4811684

In order to solve the above-mentioned problems, the handrail water stopping treatment method of the present invention comprises a plurality of cylindrical metal pillars erected at intervals and fixed to a concrete structure on the lower end side, and the plurality of pillars. A water stopping treatment method for a handrail with a coping fixed to the upper end, in which an upper through-hole is provided on the upper end side of the support, and a two-liquid resin that foams and hardens by mixing has a viscosity of 100 mPa after mixing and before foaming.・A foaming liquid having a cream time of 1 minute or more and 10 minutes or less is used, and the foaming liquid is injected into the hollow part from the upper through-hole of the support and allowed to reach the bottom part. The foaming liquid is foamed from the bottom to reach the upper through-hole and hardened, so that the hollow part is filled from the bottom to the upper end while the water-impermeable foam is adhered to the inner surface of the support. Characterized by

In the handrail water stoppage treatment method of the present invention , in the case of a handrail that has already been used for a long time, a lower through hole is provided at the lower end side of the column, and the water accumulated in the hollow part is discharged from the lower through hole. After blocking the through-hole, it is preferable to inject the foaming liquid from the upper through-hole to foam.

In the handrail water stoppage treatment method of the present invention, when water stoppage treatment is applied to a new or existing handrail, an upper through hole is provided on the upper end side of the pillar, and a foaming liquid is injected from the upper through hole to reach the bottom. , the foamable liquid is foamed from the bottom to reach the upper through-hole.
In the case of handrails that have been in use for a long time, a lower through-hole is provided at the lower end of the post, and after the water accumulated in the hollow part is discharged from the lower through-hole and the lower through-hole is closed, foaming is performed from the upper through-hole. It is preferable to inject and foam the liquid.

In the water stoppage treatment method for handrails of the present invention, it is more preferable that the rise time of the foamable two-liquid type resin is 10 minutes or more and 30 minutes or less. The foaming ratio of the foaming liquid may be adjusted to 5 to 10 times.

Furthermore, in a handrail in which a plurality of cylindrical metal pillars are erected at intervals and fixed to a concrete structure at the lower end side and a coping is fixed to the upper ends of the plurality of pillars, the hollow part of the pillars A handrail structure in which a reinforcing member protruding downward through the bottom of the support is provided, and the lower part of the reinforcing member is embedded in the concrete structure,
An upper through-hole for injecting a foaming liquid is provided on the upper end side of the support, and the foaming liquid is filled and cured from the upper through-hole into the hollow part on the upper end side from the bottom of the support, and the upper through-hole is sealed. As a result, the hollow part of the column is formed as a solid body so as to prevent water from entering the inside of the column.

According to the handrail water stoppage treatment method of the present invention, by injecting foaming liquid into the hollow part of the pillar and causing it to foam and harden, the hollow part is formed in a state where the water-impermeable foam is adhered to the inner surface of the pillar. Since the column is filled from the bottom to the top, water does not enter or stay inside the column. Therefore, water does not intrude into the hollow portion of the pillar, and it is possible to reliably prevent the handrail and the concrete structure from deteriorating due to the infiltrated or accumulated water. In addition, it is possible to prevent effluent from the pillars and water scale from adhering to the surface of the concrete structure.

In addition, the foaming liquid is injected from the upper end side of the pillar to foam and harden, thereby filling the inside of the pillar with the foam over substantially the entire length of the pillar, which facilitates construction. In addition, since the handrail is lightweight because it is made of foam, the increase in weight of the handrail can be kept to a minimum, and no reinforcing work is required.
Therefore, according to the present invention, it is possible to provide a waterproof treatment method for a handrail that can prevent water from entering the inside of the support of the handrail and can be easily constructed.

In the handrail water stoppage treatment method of the present invention, an upper through hole is provided on the upper end side of the pillar, the foaming liquid is injected from the upper through hole to reach the bottom, and the foaming liquid is foamed from the bottom to the upper through hole. , the foamable liquid can be easily and reliably foamed in the range from the bottom to the upper end of the column.
Furthermore, if a lower through-hole is provided at the lower end of the column, the water accumulated in the hollow part is discharged from the lower through-hole, the lower through-hole is closed, and foaming liquid is injected from the upper through-hole to cause foaming. In addition, water inside the existing handrail can be drained when the existing handrail is subjected to water stopping treatment, and progress of deterioration of the existing handrail can be prevented.

Further, in the handrail water stoppage treatment method of the present invention, the support has a cylindrical support main body and a cylindrical reinforcing material inserted into the hollow part of the support main body, and the gap between the reinforcing material and the support main body is If the foaming liquid is allowed to reach the bottom of the support and the bottom of the inner part of the reinforcing material to foam, even if the cylindrical reinforcing material is inserted in the hollow part, a space where water will accumulate will not be formed in the support. Therefore, it is possible to reliably prevent water from entering from the outside.

Further, in the handrail water stoppage treatment method of the present invention, a plurality of streak-like projections continuous in the longitudinal direction are provided on the inner surface of the column, and foaming is performed so as to be continuous in the gaps between the streak-like projections and in the hollow portion. If the liquid is foamed and the foam is integrally and continuously filled, the foam can reliably prevent water from entering and moving into the support even if a continuous gap is provided in the longitudinal direction. Moreover, the continuous streak-like projections can increase the surface area of the inner surface of the strut and increase the adhesive force between the inner surface of the strut and the foam, so that the inner surface of the strut and the foam can be bonded more firmly. It is possible to prevent the intrusion and movement of water.

In the handrail water stoppage treatment method of the present invention, a two-liquid resin that foams and hardens when mixed is used as the foaming liquid, and the viscosity after mixing and before foaming is set to 100 mPa s or more and 2,000 mPa s or less. If the cream time is adjusted to 1 minute or more and 10 minutes or less, when the foaming liquid is injected into the support and foamed, it is easy to foam after reaching the bottom of the support, and the foam is filled over substantially the entire length of the inside of the support. I can In this case, if the rise time of the two-liquid type resin is 10 minutes or more and 30 minutes or less, it is easy to fill every corner of the inside of the support with the foam, and the waterproofness is improved. Further, in the handrail water stopping treatment method of the present invention, by adjusting the foaming ratio of the foaming liquid to 5 to 10 times, a sufficient water stopping effect can be obtained while suppressing an increase in the weight of the handrail.

1 is a front view showing a handrail structure to which water stopping treatment according to an embodiment of the invention is applied; FIG. It is a longitudinal cross-sectional view which expands and shows a part of support|pillar to which the waterproofing process which concerns on the said embodiment is applied. FIG. 4 is a cross-sectional view showing a post of a handrail to which water stopping treatment according to the embodiment is applied; It is a figure explaining the procedure of the waterproofing process which concerns on the said embodiment, and shows the state which provided the upper through-hole and the lower through-hole. It is a figure explaining the procedure of the waterproofing process which concerns on the said embodiment, and shows the state which inject|pours foaming liquid into a support|pillar. It is a figure explaining the procedure of the water stoppage process which concerns on the said embodiment, and shows the state with which the support|pillar was filled with the foam.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
The objects to be water-stopped are handrails used in verandas, balconies, corridors, stairs, landings, etc. of various buildings. As shown in FIG. 1, the handrail 10 of the present embodiment has a concrete structure 12 with a plurality of cylindrical metal pillars 11 spaced apart from each other. 13 are fixed, and a double coping 14, a lower chord member 15, a lattice member 16 and the like are installed between the pillars 11.

As shown in FIG. 2, the pillar 11 is fixed to the concrete structure 12 at the lower end side. The column 11 has a reinforcing member 17 that is fixed and erected to the concrete structure 12 and a column body 18 that is connected to the reinforcing member 17 and erected. The reinforcing member 17 is made of steel, and has an anchor portion 17a fixed to a reinforcing bar or the like in the concrete structure 12, and a tubular reinforcing core member 17b projecting upward from the anchor portion 17a. The lower end side of the reinforcing core material 17b is embedded in the concrete structure 12 together with the anchor portion 17a, and the upper end side thereof is arranged so as to protrude upward from the concrete structure 12. As shown in FIG.

As shown in FIG. 3, the column main body 18 is made of a tubular extruded material made of aluminum. In this embodiment, the outer peripheral cross-sectional shape has a substantially rectangular shape, and the outer surface is subjected to alumite treatment.
The inner surface of the column body 18 is provided with a plurality of streak-like projections 18a that extend continuously over the entire length in the longitudinal direction. In this embodiment, a pair of streak-like projections 18a for forming screw holes are provided at a plurality of positions protruding over the entire length. Since the gaps 18b between the streak-like projections 18a are open inward over the entire length, the inner hollow portion 21 and the gap 18b are continuous over the entire length.

A reinforcing core member 17b of the reinforcing member 17 is inserted into the hollow portion 21 inside the plurality of streak-like projections 18a of the column main body 18 and fixed with a screw (not shown). The lower end of the support body 18 is embedded in the concrete structure 12 in this state. Further, the upper end of the column main body 18 is screwed to the top rail receiving member 13a so as to block the hollow portion 21, and the top rail 13 is fixed to the top rail receiving member 13a.

In order to apply water stoppage treatment to the inside of the support 11 according to the present embodiment, the handrail 10 is installed on the concrete structure 12 . The handrail 10 may be one that has just been installed, or it may be an existing one that has already been in use for a long period of time, but this embodiment will be described using the latter example.

The water stopping treatment is performed by filling the hollow portion 21 of the support 11 with the foam 22 . Since the handrail 10 is in the existing state, both the upper end side and the lower end side of the hollow portion 21 of the post 11, that is, the inside of the post main body 18 and the reinforcing member 17 are closed. Therefore, the filling of the foam 22 is performed by injecting a predetermined foaming liquid 22a into the hollow portion 21 to foam and harden it. As the foamable liquid 22a, a highly fluid liquid containing a polyurethane resin composition can be used. In the present embodiment, a two-liquid type resin that foams and hardens by mixing two liquids is used.

As the foamable liquid 22a, a first liquid containing a polyol component, which is a compound having two or more hydroxyl groups, and a second liquid containing a hydrophobic isocyanate component can be used. Polyether-based polyols, polyester-based polyols, diene-based polyols, polyhydric alcohols, castor oil polyols, castor oil-modified polyols, hydroxyl group-containing diethylene-based polymers, and the like can be used as polyol components.

Polyether-based polyols include ethylene glycol, diethylene glycol, polyethylene glycol, propylene glycol, dipropylene glycol, polypropylene glycol, polytetramethylene glycol, 1,4-butanediol, neopentyl glycol, bisphenol A, bisphenol F, or these Bifunctional polyol, trimethylolpropane, hexanetriol, glycerin, etc., obtained by addition polymerization of one or more kinds of alkylene oxide, or trifunctional polyol, pentaerythritol, sorbitol, or alkylene oxide added to these. Examples include addition-polymerized polyfunctional polyols, products obtained by addition-polymerizing alkylene oxide to aniline, and products obtained by addition-polymerizing alkylene oxide to alkanolamine.

Various polyfunctional aliphatic, alicyclic and aromatic isocyanates can be used as the isocyanate component. For example, hexamethylene diisocyanate (HDI), isophorone diisocyanate (IPDI), 4,4-dicyclohexylmethane diisocyanate (HMDI), 2,4-tolylene diisocyanate (2,4-TDI), 2,6-tolylene diisocyanate (2. 6-TDI), 4,4-diphenylmethane diisocyanate (MDI), orthotoluidine diisocyanate (TODI), naphthalene diisocyanate (NDI), xylylene diisocyanate (XDI), lysine diisocyanate (LDI) and isocyanate-containing prepolymers using these isocyanates. polymers and the like. As polyisocyanates, NCO contents of 5 to 40%, preferably 20 to 30%, are preferred.

A catalyst component, a foaming agent component, a foam stabilizer component, and the like can be appropriately contained in the first liquid or the second liquid. As catalyst components, N,N,N',N'-tetramethylethylenediamine, N,N,N',N'-tetramethylpropane-1,3-diamine, N,N,N',N'-tetra methylhexene-1,6-diamine, N,N,N',N'',N''-pentamethyldiethylenetriamine, N,N-dicyclohexylmethylamine, bis(N,N-dimethylaminoethylpiperazyl)ethane, N, Tertiary amines such as N',N''-tris(diethylaminopropyl)hexahydrotriazine, dibutyltin dilaurate, dibutyltin diacetate and the like.

Examples of foaming agent components include water, fluorinated hydrocarbons, methylene chloride, pentane, cyclopentane, acetone, methyl ethyl ketone, methyl acetate, ethyl acetate, and other low-boiling solvents. Examples of the foam stabilizer component include surfactants such as polyoxyalkylene type such as polyoxyalkylene alkyl ether and silicone type such as organopolysiloxane.

Such a foaming liquid 22a is used by uniformly mixing the first liquid and the second liquid immediately before application. After mixing the two liquids and before foaming, the foamable liquid 22a is injected into the upper end side of the column 11 as described later, so that the foamable liquid 22a has such a low viscosity that it can flow down the inside of the column 11 and reach the lower end of the column 11. is desirable.
The viscosity may be adjusted using, for example, a phthalate plasticizer, a trimellitate plasticizer, a sebacate plasticizer, a sulfonate plasticizer, or the like. Although not particularly limited, in the present embodiment, the viscosity of the foamable liquid 22a after mixing and before foaming is preferably 100 mPa·s or more and 2,000 mPa·s or less.

Since the foamable liquid 22a of the present embodiment is filled as urethane foam by utilizing the competitive reaction between foaming and gelation, it is necessary to adjust the start time of foaming and the start time of gelation. It is desirable to adjust so that the gelation reaction starts at the same time as the starts. This adjustment can be made by adjusting the catalyst, the combination of catalyst species and the amounts of these catalysts.

It is desirable that the foaming liquid 22a has a moderately slow rate of foaming and curing. These may be adjusted by, for example, the catalyst, the prepolymerization rate of the isocyanate and the molecular weight of the polyol.
The time during which urethane foam can remain liquid is called cream time, and is an indicator of pot life. In this embodiment, it is preferable to set the cream time to 1 minute or more and 10 minutes or less in order to ensure pourability. If the foaming is excessively fast, the foaming progresses before the foaming liquid injected into the upper end side of the column 11 reaches the bottom, making it difficult to fill the bottom with the foam. On the other hand, excessively slow foaming results in poor workability.

On the other hand, the time required for urethane foam to complete foaming is called rise time, which is an index of curing time. In the present embodiment, the rise time is preferably 10 minutes or more and 30 minutes or less in order to ensure short-time curability for tact-free operation. In this case, a difference of 9 minutes or more from the tact time may be provided. By setting the rise time within this range, the foamable liquid 22a during foaming can be filled to every corner of the interior of the column 11, and streak-like projections such as screw holes continuing from the wide hollow portion 21 inside the column 11 can be formed. The gap 18b of 18a can also be continuously filled with air bubbles.

The foaming ratio of the foaming liquid 22a, which is a mixture of two liquids, is adjusted to, for example, 5 to 10 times. If the expansion ratio is excessively low, the weight of the foam 22 with which the struts 11 are filled becomes large, which is not preferable because the weight of the entire handrail increases. On the other hand, if the foaming ratio is excessively high, the foam 22 will be in a sparse state, making it difficult to block the flow of water, thus reducing the water stopping effect. In addition, it is preferable that the foam 22 obtained after foaming has more closed cells, and the closed cell ratio may be increased by adjusting a foam stabilizer, for example. It is desirable that the closed cell ratio be in a range where water cannot pass through.

Further, the foamable liquid 22a of the present embodiment preferably has adhesiveness or cohesiveness to the extent that it can prevent water infiltration at the boundary portion with the inner surface of the support 11 in the state of the foamed body 22 obtained after foaming. For example, the adhesiveness or tackiness may be adjusted by selecting or adding the polyol component of the first liquid, the isocyanate component of the second liquid, the catalyst component, or the like. In addition, it is desirable that the state of the foam 22 obtained after foaming is difficult to absorb water, and in this embodiment, the water absorption is reduced by selecting a hydrophobic component as the isocyanate component of the second liquid.

In order to fill the hollow portion 21 of the support 11 with the foam 22 using such a foaming liquid 22a to perform water stoppage treatment, as shown in FIG. An upper through hole 23 is provided at the position. Further, by providing a lower through-hole 24 on the lower end side of the support 11 , water accumulated in the hollow portion 21 of the support 11 is discharged from the lower through-hole 24 . The water accumulated below the lower through hole 24 can also be pumped out by a pump or the like.

The lower through-hole 24 is provided so as to penetrate to the lower end side of the reinforcing core member 17b of the reinforcing member 17 on the lower end side of the column main body 18 . As a result, water accumulated in both the gap 21a between the outer surface of the reinforcing member 17 and the inner surface of the column 11 and the inner side of the reinforcing core member 17b of the reinforcing member 17 can be discharged. After draining the collected water, as shown in FIG. 5, the lower through-hole 24 of the support body 18 is closed with a plug or the like while leaving the lower through-hole 24 of the reinforcing core 17b open.

Next, the first liquid and the second liquid are mixed to prepare a bubbling liquid 22a, and as shown in FIG. In the present embodiment, the bubbly liquid 22a injected from the upper through-hole 23 is allowed to flow down within the column 11, so that it can reach the bottom within the cream time period.
As shown in FIG. 5, the effervescent liquid 22a that has reached the bottom passes through the lower through-holes 24 provided in the reinforcing core 17b of the reinforcing member 17, the gap 21a between the reinforcing member 17 and the support 11, and the reinforcing material. The foamable liquid 22a can reach the bottom of both the gap 21a between the reinforcing member 17 and the support 11 and the inner space 21b of the reinforcing member 17 by appropriately flowing between the inner space 21b of the member 17 and the inner space 21b of the reinforcing member 17. .

The foamable liquid 22 a that has reached the bottom is foamed sequentially from the bottom and fills the hollow portion 21 of the column 11 . At this time, by foaming the foaming liquid 22a from the bottom of the gap 21a between the reinforcing material 17 and the support 11 and the bottom of the inner space 21b of the reinforcing material 17, the gap 21a between the reinforcing material 17 and the support 11 and the reinforcing material 17 It is possible to fill both the inner space 21b of and the foamed cells. As the foaming progresses further, the hollow portion 21 of the strut 11 above the reinforcing material 17 can also be continuously foamed, and the entire hollow portion 21 of the strut 11 can be continuously filled with air bubbles.

Then, when the entire hollow portion 21 of the column 11 is filled with air bubbles and the foam reaches the upper through-hole 23 , it overflows from the upper through-hole 23 . By sufficiently hardening the cells in this state, as shown in FIG. 6, the foam 22 can be continuously and integrally filled from the bottom to the upper end of the hollow portion 21 of the support 11 . Thereafter, the foam that overflows from the upper through-hole 23 and hardens is cut off, and the upper through-hole is closed with a plug or the like, thereby completing the waterproof treatment of the column 11 . As a result, the hollow portion 21 of the support 11 is filled with the dense foam 22 as a whole, including the gaps in the hollow portion 22, so that the entire support 11 is formed as a solid body.

According to the water stoppage treatment method for the handrail 10 as described above, the foaming liquid 22a is injected into the hollow portion 21 of the post 11 to foam and harden, so that the foam 22 impervious to water is formed on the inner surface of the post 11. Since the hollow part 21 is filled from the bottom part to the upper end side in the adhered state, the inside of the column 11 can be completely water-stopped, and rainwater, condensed water, etc. will not enter or stay inside the column 11.例文帳に追加Therefore, it is possible to reliably prevent the inside of the handrail 10 from being deteriorated due to corrosion or the like due to water, and the deterioration of the strength of the handrail 10 is prevented. In addition to preventing water from entering the inside of the concrete structure 12 to which the pillars 11 are fixed, water does not flow out from the inside of the pillars 11 to the surface of the concrete structure 12. There is no deterioration of the appearance quality, no deterioration of the appearance quality, and no outflow from the inside of the column 11, water stains, etc. adhere to the surface.

Moreover, by injecting the foamable liquid 22a from the upper end side of the column 11 to foam and harden it, the foam 22 fills the entire interior of the column 11, so pretreatment such as sealing and bonding of each part is unnecessary. In addition, no special injection work is required, and construction is easy. In addition, since the support 11 is filled with the lightweight foam 22, the increase in weight of the handrail 10 can be suppressed as much as possible, and reinforcement or the like is unnecessary. Therefore, according to the water stoppage treatment method of this embodiment, it is possible to prevent water from entering or moving inside the column 11, and it is possible to realize a water stoppage treatment method that can be easily implemented.

In the above-described embodiment, the upper through-hole 23 is provided on the upper end side of the column 11 , the foaming liquid 22 a is injected from the upper through-hole 23 to reach the bottom, and the foaming liquid 22 a is foamed from the bottom to form the upper through-hole 23 . I am making it reach. Therefore, the foamable liquid 22a can be easily and reliably foamed in the range from the bottom to the upper end of the column 11. As shown in FIG.

A lower through-hole 24 is provided on the lower end side of the column 11, and after the water accumulated in the hollow portion 21 is discharged from the lower through-hole 24, the bubbling liquid 22a is injected from the upper through-hole 23 to cause foaming. . Therefore, when the existing handrail 10 in use is treated to stop water, the water already accumulated inside the support 11 can be discharged first, and the progress of deterioration of the existing handrail 10 can be prevented.

Further, in this embodiment, the support column 11 has a cylindrical support body 18 and a cylindrical reinforcing material 17 inserted into the hollow portion 21 of the support body 18, and between the reinforcing material 17 and the support body 18 The foaming liquid reaches the bottom of the gap 21a and the inner bottom of the reinforcing member 17 to foam. Therefore, even if the cylindrical reinforcing member 17 is inserted into the hollow portion 21 of the column main body 18, no space for water to accumulate is formed inside the column 11 as a whole, and the infiltration of water from the outside is reliably prevented. can be prevented.
In this embodiment, since the bubbling liquid 22a is injected into the reinforcing member 17 with the lower through-holes 24 open, the bubbling liquid 22a can move inside and outside through the lower through-holes 24. FIG. Therefore, the foaming liquid 22a can be foamed and hardened both in the gap 21a between the reinforcing member 17 and the support 11 and in the inner space 21b of the reinforcing member 17. FIG.

Further, in this embodiment, a plurality of continuous streak-like projections 18a are formed as ribs in the longitudinal direction on the inner surface of the strut body 18, and the gaps between the hollow portion 21 inside the strut body 18 and the plurality of streak-like projections 18a are formed. The foam 22 is continuously filled integrally so as to be continuous with 18b. Therefore, even if the gap 18b is continuously provided in the longitudinal direction, no gap or the like through which water can move is generated in the column main body 18, and the entire internal space of the column can be water-stopped. Moreover, if a plurality of streak-like projections 18a are provided on the inner surface of the strut body 18, the surface area of the inner surface of the strut 11 can be increased, and the adhesive force between the inner surface of the strut 11 and the foam 22 can be increased. The inner surface of 11 and the foam 22 can be firmly adhered, and it is possible to prevent water from entering and moving.

It should be noted that the above embodiment can be appropriately modified within the scope of the present invention.
In the above embodiment, an example was described in which the post 11 of the handrail 10, which had already been in use for a long time, was subjected to water stoppage treatment, but the present invention is not limited to this example. The present invention can also be applied to the post 11 of the handrail 10 of . In that case, in the above description, before the foaming liquid 22a is injected, the lower through-holes 24 are provided in the lower end side of the column main body 18 and the lower end side of the reinforcing core member 17b of the reinforcing member 17, and the liquid is accumulated in the hollow portion 21. Although the water is discharged, the lower through-hole 24 may not be provided in the case of the handrail 10 immediately after installation. However, when the foaming liquid 22a is injected from the upper end side of the column main body 18, the foaming liquid 22a fills both the gap 21a between the outer surface of the reinforcing member 17 and the inner surface of the column 11 and the inside of the reinforcing member 17. is not sufficiently injected, it is preferable to provide a lower through-hole 24 in the reinforcing member 17 . In the above-described embodiment, the upper end of the support 11 is provided with the upper through-hole 24 and the foaming liquid 22a is injected thereinto. It is also possible to inject the liquid 22a. In this case, it can be confirmed that the entire inside of the column 11 is filled with air bubbles by overflowing the air bubbles from the upper end.

In the above-described embodiment, an example of the column 11 in which the reinforcing member 17 and the column body 18 are joined has been described. The present invention can be similarly applied even if it is fixed to the structure 12 .
Furthermore, in the above description, an example in which each part of the handrail 10 including the strut 11 is formed of an extruded aluminum material has been described, but a part or the whole of the handrail 10 may be made of another metal.
In the above description, an example of using a liquid containing a polyurethane resin composition as the foaming liquid was described, but the present invention is not particularly limited, and any liquid having fluidity that can be foamed and cured can be used. can be used as appropriate.

10 Handrail 11 Column 12 Concrete structure 13 Top rail 13a Top rail support member 14 Double top rail 15 Lower chord member 16 Lattice member 17 Reinforcing member 17a Anchor portion 17b Reinforcing core member 18 Column body 18a Strip-like projection 18b Gap 21 Hollow portion 21a Gap 21b Inner space 22 Foam 22a Foaming liquid 23 Upper through-hole 24 Lower through-hole

Claims (6)

A handrail water stoppage treatment method in which a plurality of cylindrical metal pillars are erected at intervals and fixed to a concrete structure at the lower end side and a coping is fixed to the upper ends of the plurality of pillars,
An upper through hole is provided on the upper end side of the support,
A two-liquid resin that foams and hardens when mixed, and has a foaming property in which the viscosity after mixing and before foaming is 100 mPa·s or more and 2,000 mPa·s or less and the cream time is 1 minute or more and 10 minutes or less. using a liquid
The foaming liquid is injected into the hollow portion from the upper through-hole of the support to reach the bottom, and the foaming liquid is foamed from the bottom to reach the upper through-hole and hardened, thereby preventing water passage. 2. A water stoppage treatment method for a handrail, wherein the hollow portion is filled from the bottom to the upper end side in a state where the foam is adhered to the inner surface of the support. 2. The water stoppage treatment method for handrails according to claim 1 , wherein the rise time of said two-liquid type resin is 10 minutes or more and 30 minutes or less. A lower through-hole is provided at the lower end of the column, water accumulated in the hollow portion is discharged from the lower through-hole, the lower through-hole is closed, and then the bubbling liquid is injected from the upper through-hole. The water stoppage treatment method for handrails according to claim 1 , wherein the handrail is foamed. The support has a cylindrical support main body and a cylindrical reinforcing member inserted into a hollow portion of the support main body. 2. The water stoppage treatment method for handrails according to claim 1 , wherein the foaming liquid is caused to reach the . A plurality of streak-like projections continuous in the longitudinal direction are provided on the inner surface of the support, and the foamable liquid is foamed so as to be continuous in the gaps between the streak-like projections and in the hollow portion. 2. The water stoppage treatment method for handrails according to claim 1 , wherein the foam is continuously and integrally filled. 2. The water stoppage treatment method for handrails according to claim 1 , wherein the foaming ratio of the foaming liquid is adjusted to 5 to 10 times.

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