JP2002220871A - Support installing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a support installing method capable of facilitating filling of a fixative in a gap in injecting the fixative (adhesive) after inserting a handrail support in a previously provided support fitting hole, facilitating an execution method for it, and attaining enough fixing (adhesive) strength. SOLUTION: This support installing method for fixing the handrail support or the like to a base by the fixative includes a first process of providing a support fitting hole opened to the upper side in the surface of the base, and inserting the support in the hole, and a second process of providing a passage communicated extending from the vicinity of the bottom of a gap 1 formed by the support and the support fitting hole to the surface part, and filling the gap 1 with aggregate 4, wherein the fixative 5 is injected from the surface part of the gap filled with the aggregate 4 to be filled while the air in the gap is discharged through the passage, and the injected and filled fixative 5 is solidified or hardened.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention mainly relates to a method of attaching handrails installed on the periphery of a building roof or an outer edge of a veranda, and a method of attaching a support for fixing various machines to a concrete substrate. The present invention relates to a method of mounting a support when mounting the support.

[0002]

2. Description of the Related Art As a conventional method of mounting a support such as a handrail, a support mounting hole is provided to a depth at which a reinforcing bar inside concrete can be seen, and the handrail support is directly welded to the reinforcing bar or mounted. There has been adopted a construction method in which a base plate is welded in advance, and thereafter, a column is fixed to a mounting plate, and then a mortar is filled in a gap between the column and the mounting hole. The mortar used here is usually cement mortar or resin mortar, but recently, two-component reactive epoxy resin mortar or polyester resin mortar, which has been divided into small amounts in advance to reduce the required filling time from the shortening of construction, is measured at the construction site, There is also a construction example of mixing and filling.

Also, as disclosed in Japanese Patent Application Laid-Open No. Hei 7-11748, after a column is inserted into a cylindrical mounting hole, a liquid curable filler flows into the column from above and fills the inside of the column and the mounting hole and cures. Alternatively, as disclosed in Japanese Patent Application Laid-Open No. 9-25694, there is a method in which an uneven portion is formed in advance at the lower end portion of a support column, a mounting hole is formed by a drill, and then the support column is inserted into the mounting hole and filled with a filler. There is also a method in which an anchor bolt is driven into a concrete surface and a support is fixed to the anchor bolt in order to eliminate the need for machining the mounting hole. Furthermore, Japanese Patent Publication No. 56-4
In 4216, as a method of fixing the mounting column at the time of installing the machine, after inserting the column into the mounting hole, the gap between the mounting hole and the column is filled with ceramic beads having a particle size of about 2 to 6 mm, and the positioning is performed. A method of pouring a liquid epoxy resin has also been proposed.

[0004]

As described above, various construction methods have been proposed. Among them, a method of inserting a mortar into a gap after inserting a support mounting hole provided with a support in advance, and fixing the mortar into the gap. However, since the mortar can be injected only from the upper part of the gap, the air inside the gap cannot be sufficiently exhausted to the outside, leaving a gap, and an unfilled portion of the mortar is formed, thereby lowering the fixing strength. For this reason, as in Japanese Patent Publication No. Sho 56-44216, a method of first filling the gap with a filler serving as an aggregate, and subsequently injecting and filling a liquid synthetic resin to solidify, is also used. It was difficult to discharge the air in the gap.

Therefore, in the present invention, when the fixing agent (adhesive) is injected after inserting the support mounting hole provided with the handrail support in advance, the gap of the fixing agent can be easily filled. It is an object of the present invention to provide a method of mounting a support pillar that can be performed, is easy to perform, and has sufficient fixing (adhesion) strength.

[0006]

According to a first aspect of the present invention, there is provided a method of attaching a support such as a handrail to a base using a fixing agent. A first step of providing a column mounting hole with an open top and inserting the column into the hole, and (2) forming a gap formed between the column and the column mounting hole from near the bottom of the gap to the surface portion. A second step of filling the gap with the aggregate, and (3) injecting a fixing agent from the gap surface filled with the aggregate to remove the air inside the gap. The filling agent was filled while being discharged through the passage, and the injected filling agent was solidified or cured.

Further, in the second invention, (1) a first step of providing a column mounting hole having an open top on the surface of the base, and inserting and disposing the column in the hole; (2) a column and column mounting A second step of providing a passage communicating from the vicinity of the bottom of the gap to the surface of the gap formed with the hole, and then filling the gap with the aggregate; and (3) near the bottom of the gap through the passage. The fixing agent is press-filled upward from above, and the filled fixing agent is solidified or cured.

Hereinafter, each element of the present invention will be described in detail. Examples of the fixing agent that can be used in the present invention include an inorganic cement and an organic synthetic resin.However, in consideration of workability at the time of filling into a gap, filling efficiency, and quick curing property, an organic synthetic resin is used. Resins are preferred. Specific examples of organic synthetic resins include reactive resins such as urethane resins, phenolic resins, epoxy resins, polyester resins, acrylic resins, silicone resins, and curable resins such as modified silicone resins. Reacting curing agents and other additives (fillers, pigments, dyes, leveling agents, defoamers,
Those containing a polymerization catalyst, an adhesion promoter, a stabilizer and the like can be used. Since it is preferable that these reactive resins rapidly react and cure at room temperature, it is desirable to use a reactive resin composed of two or more components. When these multi-component reactive resins are used, it is necessary to complete the pouring and filling work between the mixing of each component at the work site and the occurrence of gelation (pot life). It is desirable that the resin be a reactive resin whose life can be easily adjusted. The adjustment of the pot life depends on the type of the reactive resin, but is generally adjusted by the type and the amount of the curing agent and the reaction accelerator, or by adjusting the viscosity of the main agent, or by heating the resin. This can be achieved by cooling.

The lower the viscosity of the above-mentioned fixing agent at the time of pouring and filling, the more efficient the pouring and filling. However, when the base such as concrete has cracks or cracks, it has an appropriate viscosity. Also, it is effective to impart thixotropic properties. Further, it is preferable to add a filler as much as possible in consideration of shrinkage (thinning) of the cured product to prevent this.
The viscosity of the fixing agent in the present invention is approximately 20,000 mPa · S
It is desirable that: More preferably 0.1 to
20000 mPa · S.

In particular, when a radical reactive resin such as an acrylic resin or a polyester resin is used as the multi-component reactive resin, a catalyst (reaction accelerator) for curing the resin to the aggregate. Is contained (adhered to or impregnated on the surface of the aggregate), so that the work can be performed more efficiently without worrying about the pot life of the reactive resin. In addition, since these radically polymerizable resins have high reactivity and have sufficient immediate curing properties even at low temperatures, they can be applied in a short time even in winter.

The radically-reactive resins such as the above-mentioned acrylic resins and polyester resins include styrol having a reactive vinyl group and unsaturated polyester resins mainly composed of unsaturated polyester resins, and acrylic acid ester blends. . Examples of unsaturated polyester resins include α, β unsaturated dibasic acids such as maleic anhydride and phthalic acid, and if necessary, a part thereof is a saturated dibasic acid component such as phthalic anhydride, isophthalic acid and terephthalic acid. And an unsaturated polyester obtained by polycondensing a glycol such as ethylene glycol, propylene glycol, diethylene glycol, dipropylene glycol or hydrogenated bisphenol A at a molar ratio of about 1: 1 with styrene, vinyltoluene, It is obtained by dissolving in a crosslinking unsaturated monomer such as chlorostyrene, divinylbenzene, diarylphthalate, acrylates and methacrylates, and adding a polymerization inhibitor such as hydroquinone.

[0012] In the acrylate compound, a compound having at least one polymerizable double bond at the terminal or side chain of the molecule is, for example, a compound having (meth) acryloyl at the terminal or side chain of the molecule. As a typical example, a compound having a group can be used a conventionally known compound. Representative examples of these compounds include 2-ethylhexyl (meth) acrylate, 2-hydroxyethyl (meth) acrylate, dimethylaminoethyl (meth) acrylate, epoxidized bisphenol A type di (meth) acrylate, 1.3 butanediol Di (meth) acrylate,
There are compounds such as ethylene glycol di (meth) acrylate, neopentyl di (meth) acrylate, and polyurethane polyfunctional (meth) acrylate obtained by reacting diisocyanate with glycol and hydroxyalkyl (meth) acrylate.

In order to cure the radically reactive resin such as the above-mentioned acrylic resin or polyester resin,
For example, peroxides such as peroxides, hydroperoxides, peresters and peramides (preferably peroxides, more preferably diacyl peroxide) and, for example, ethylenethiourea, 4,4′-tetramethyldiaminodiphenylmethane, 2-mercapto The redox system is formed by combining with a metal complex compound such as benzimidazole, benzisoylhydrazine, L-ascorbic acid, dimethylaniline, dimethyl-P-toluidine, O-sulfobenzoimide, mercaptoethanol or thioglycol, or ferrocene. The curing agent system that forms is suitable. In this curing agent system, radicals are easily generated by contact between the two, and the curing ratio is sufficiently cured even when the mixing ratio is relatively rough. Therefore, either one of the components is contained in the aggregate previously filled in the gap. By placing it, you can work without worrying about the pot life described above, and because there is no need for accurate mixing work on site unlike other multi-component reactive resins, extremely workability is excellent and mixing is insufficient Also, there is no occurrence of poor curing due to an incorrect mixing ratio.

As the aggregate used in the present invention, various types of conventionally used aggregates can be used. Specifically, silica sand, fly ash, quartz sand, spherical glass, fibers such as glass fiber, and hollow fillers can be used,
Preferably it is silica sand. Further, the particle size of these aggregates depends on the size of the gap formed between the support and the hole for receiving the support, but is preferably approximately 0.1 to 5 mm. As a method of including one of the components of the curing agent system of the radical-reactive resin such as the acrylic resin or the polyester-based resin described above in the aggregate, in addition to the method of simply mixing the aggregate as it is, an appropriate solvent for the catalyst is used. The aggregate may be mixed with the solution dispersed or dissolved therein, or may be attached to the surface of the aggregate by spraying the solution onto the surface of the aggregate and then drying.

[0015] In addition to the above-mentioned aggregates, various additives can be used in the radically reactive resin such as the acrylic resin and the polyester resin described above. Specific examples thereof include adding an antifoaming agent for the purpose of removing bubbles during the impregnation, and alkoxysilanes such as trimethylmethoxysilane, dimethyldimethoxysilane, and methyltrimethoxysilane for the purpose of improving the adhesion to the concrete of the foundation. Methoxysilane, tetramethoxysilane, trimethylethoxysilane, dimethyldiethoxysilane, dimethylvinylmethoxysilane, methylvinyldimethoxysilane, diphenyldimethoxysilane, γ-chloropropylmethyldimethoxysilane, γ-aminopropyltriethoxysilane,
A base adhesion improver such as a coupling agent such as N- (β-aminoethyl) -γ-aminopropyltrimethoxysilane, γ-glycidoxypropyltrimethoxysilane, γ-methacryloxypropyltrimethoxysilane, etc. In addition, it is also effective to use a method in which the composition is applied to the surface of excavated concrete or applied as a primer.

Further, pigments and toners such as titanium oxide and zinc white added for the purpose of aesthetics, and a fungicide, a flameproofing agent, and a rust preventive for the purpose of preventing the aesthetics and deterioration after construction can be added.
It is also useful to add a polymerization inhibitor such as hydroquinone for the purpose of suppressing the reactivity, and to blend a curing accelerator with the aggregate or the main agent for the purpose of improving the reactivity.
Further, it is also useful to disperse or dissolve a thermoplastic resin such as an acrylic copolymer resin or a vinyl acetate resin in the present resin for the purpose of improving the resin strength. Mixing a thermoplastic or thermosetting solid filler with the aggregate is also useful for the purpose of suppressing shrinkage of the cured product and increasing the impregnation.

The above-described technique of previously containing a catalyst for promoting the curing of the reactive resin in the aggregate is effective only for radically reactive resins such as acrylic resins and polyester resins. However, for example, by adding a curing agent or a curing accelerator such as a multi-component epoxy resin, a urethane resin, a silicone resin, a modified silicone resin, and a phenol resin to the aggregate, the curing of these resins can be performed. It is also possible to promote. As an appropriate combination, if the epoxy resin is an imidazole-based curing agent and the silicone-based resin is a dispersion or adhesion of a platinum catalyst to the aggregate, the curability is not as high as that of a radical-reactive resin. Similar effects can be obtained.

Next, the passage for discharging air or filling the fixing agent will be described. This passage is used for efficiently injecting and filling the fixing agent into the gap formed between the column and the column insertion hole, and specific examples thereof include a plastic tube such as a straw, a rubber hose, and a glass tube. Any shape may be used as long as it is a long tube-shaped molded body that can be inserted into the gap described above and has openings at both ends. In addition, a hollow portion may be provided inside the insertion portion of the column to be inserted, or a passage may be provided on the outer peripheral surface. In this passage, one of the openings at both ends is protruded near the deepest portion of the gap filled with the fixing agent, and the other opening is protruded near the upper portion of the gap or further out therefrom. Formed or installed and used. The size, shape, length, etc. of this passage are not specified, but
It is preferable that it is thin and has such a rigidity that the passage is not blocked by deformation due to filling of the aggregate. Also, when this passage is used for discharging air, a plurality of relatively small-diameter passages may be installed and formed. Must be considered. The passage may be removed after the filling and filling of the fixing agent, or may be left in the gap as it is.

[0019]

[Formulation Example 1]

Aggregate containing catalyst: No. 3 silica sand and No. 2 silica sand in a weight ratio of 1: 1
1 part by weight of ferrocene is mixed with 1000 parts by weight of the aggregate mixed in the above. For mixing, ferrocene was added while mixing and stirring silica sand, and mixed and stirred for about 30 minutes. This agent containing a curing agent (fixing agent): 100 parts by weight of bisphenol A-type acrylate (BPE-200: manufactured by Shin-Nakamura Chemical Co., Ltd.) and 1 part of BPO (Niper BW: manufactured by NOF Corporation) were used. The viscosity of this formulation is 60 at 25 ° C.
It was 0 mPa · S.

[Formulation Example 2] Aggregate containing catalyst: A solution of 1 part by weight of 4,4'-tetramethyldiaminodiphenylmethane (polymerization catalyst) dissolved in 50 parts by weight of toluene was prepared, and No. 4 silica sand and fly ash were prepared. While agitating 1000 parts by weight of the aggregate compounded at a weight ratio of 1: 0.5, the solution was spray-coated on the aggregate to attach a polymerization accelerator to the surface of the aggregate. Thereafter, excess toluene was removed while stirring was continued to obtain a catalyst-attached aggregate. This agent (fixing agent) containing a curing agent: TMPT (trimethylolpropane methacrylate B-3: manufactured by Shin-Nakamura Chemical Co., Ltd.)
1 part by weight of BPO (Nipper BMT-O: manufactured by NOF Corporation) in 100 parts by weight, KBM as a silane coupling agent
503 (manufactured by Shin-Etsu Chemical Co., Ltd.) and 0.5 part by weight of hydroquinone as a polymerization inhibitor were added to obtain a blend. The viscosity of this formulation at 25 ° C. was 60 mPa · S.

[0021]

Embodiment 1 As shown in FIG. 1, mounting holes (diameter 30 mm, depth 80
mm), a handrail support having a cylindrical support end 2 having a diameter of 19 mm is inserted and installed in the hole, and a straw 3 (4 mm in diameter) for bleeding air is inserted into the gap 1 between the support end 2 and the hole.
Into the vicinity of the deepest part. Next, the catalyzed aggregate 4 shown in Formulation Example 1 is charged and filled in the gap 1 to determine the mounting position. Thereafter, the main agent 5 (viscosity: 600 mPa · s) containing the curing agent of Formulation Example 1 was injected, and after confirming that the main agent 5 was filled to the top of the gap 1, the straw 3 was removed and the work was completed. did.

Thereafter, the concrete base A was cut after the above-mentioned agent was hardened, and the filling and hardening state of the resin of the present invention was confirmed. And the curing was almost complete.

[0023]

Example 2 A handrail post was attached to a concrete substrate in the same manner as in Example 1 except that the composition containing the aggregate with catalyst and the curing agent of the formulation 1 was changed to the composition shown in the formulation 2.
The diameters of holes and columns provided in the concrete substrate, straws for venting air, and the like were also measured in the same manner as in Example 1. Thereafter, the concrete base A was cut as in Example 1 to check the filling and hardening state of the agent. As a result, the acrylic agent was filled up to the deepest part of the mounting hole for the pillar, although the foam had slightly bubbles as in Example 1. And the cure was almost complete. In addition, since the viscosity of this agent was lower than that of Example 1, impregnation was quick and workability was good. In addition, when the viscosity of the present agent becomes high in a cold region or the like, the viscosity can be reduced by heating the agent to such an extent that the agent does not harden, thereby facilitating the filling and filling operation.

[0024]

Since the work of metering and mixing the resin mortar at the construction site becomes unnecessary, the construction time can be shortened and the workability is extremely good, and the generation of garbage during the construction, which becomes industrial waste, can be reduced. . In particular, since the fixing agent can be filled in the holes provided in the concrete base with almost no air bubbles, the handrail support can be firmly adhered and rainwater etc. can be prevented from entering from the outside, so the durability is greatly improved Is improved.

In particular, when an acrylic resin is used as a fixing agent, the catalyst contained in the aggregate reacts with the curing agent contained in the acrylic main agent to cause the acrylic resin to quickly and poorly cure. Since it can be cured without any problems, the workability at the time of on-site construction can be greatly improved.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a construction procedure of the present invention.

[Explanation of symbols]

 A concrete base 1 gap formed by perforations and column ends 2 column ends 3 straws 4 aggregate 5 fixing agent

Claims (10)

[Claims] 1. A method for mounting a support such as a handrail to a base using a fixing agent, comprising: (1) providing a support mounting hole having an open top on the surface of the base; And (2) providing a passage communicating with the gap formed between the column and the column mounting hole from near the bottom of the gap to the surface, and then putting aggregate in the gap. A second step of filling; and (3) a fixing agent is injected from the surface of the gap filled with the aggregate, and the inside of the gap is filled while being discharged through the passage, and the fixing agent is solidified or hardened. A method of mounting a support, comprising the third step. 2. The method according to claim 1, wherein the steps (1) to (3) further include a fourth step of removing an air discharge passage. 3. The mounting method according to claim 1, wherein the fixing agent is a reactive resin composition, and the aggregate contains a catalyst for reacting and curing the reactive resin composition. Method. 4. The reactive resin composition is at least one resin composition selected from a silicone resin, a polyester resin, an acrylic resin, an epoxy resin, and a urethane adhesive. The mounting method of the support described in. 5. The method according to claim 1, wherein said fixing agent has a viscosity of 0.2 at 25.degree.
The method for mounting a handrail support according to claim 1, wherein the pressure is 1 to 20000 mPa · S. 6. A method of attaching a support such as a handrail to a base using a fixing agent, comprising: (1) providing a support mounting hole having an open top on a surface of the base; And (2) providing a passage communicating with the gap formed by the strut and the strut mounting hole from near the bottom to the surface of the gap, and then putting aggregate in the gap. A second step of filling, and (3) a third step of press-fitting and filling the fixing agent upward from near the bottom of the gap through the passage and solidifying or hardening the injected filling agent.
A method of mounting a support, comprising the steps of: 7. The method according to claim 6, wherein the steps (1) to (3) further include a fourth step of removing an air discharge passage. 8. The mounting according to claim 6, wherein the fixing agent is a reactive resin composition, and the aggregate contains a catalyst for reacting and curing the reactive resin composition. Method. 9. The reactive resin composition is at least one resin composition selected from a silicone resin, a polyester resin, an acrylic resin, an epoxy resin, and a urethane adhesive. The mounting method of the support described in. 10. The method according to claim 6, wherein the viscosity of the fixing agent is 0.1 to 20,000 mPa · S at 25 ° C.