JP2005087909A - Applying tool and applying method using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an applying method by which there is no abnormal application situation and working efficiency can be remarkably raised in the applying method of an interstice part such as water proofing finish of a beam end. <P>SOLUTION: The applying tool is constituted by installing a plurality of applying parts, each of which is composed of an applying roller and a supporting bar for supporting the applying roller, at one stationary part. The applying parts are combined so that size of a space formed by the applying parts can be changed by changing their relative positions. Preferably, the applying tool has two applying parts and their supporting bars are combined by a spring so that a distance between two applying rollers can be changed. More preferably, a coating material is sent to two rollers to perform applying work continuously. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

The present invention relates to a girder-end waterproofing of a concrete bridge, and more particularly to a waterproofing material application method for a gap portion where a telescopic device is suspended.

It is well known that concrete bridges are prone to deterioration at the ends of the girders and abutments due to water leakage from the telescopic device. In particular, it is a place where salt damage due to water including snow melting material spread in winter is likely to occur, and preventive measures using waterproofing materials are strongly demanded.

Even in existing bridges, attempts have been made to perform girder end waterproofing when repairing the cross-section of the girder end and abutment. However, conventionally used girder end waterproofing of concrete bridges is commonly used air or airless. A spray coating method using a spraying machine or a coating method using a roller is adopted.

Regarding the method of waterproofing girder edges when repairing cross sections of girder edges and abutments, Japan Highway Public Corporation has established a performance check standard for girder edge waterproofing of concrete bridges in its waterproof system design and construction manual (draft). We are starting to deal specifically with bridges as the main target.

In the range where the girder end waterproofing method is required, the gap between the expansion and contraction device that is difficult to apply waterproof material, for example, in the case of a two-lane bridge, is 2 to 3 m high, about 10 m deep, and 100 mm wide. Before and after are common places.

In particular, there are many bridges with a width of 50 mm or less in the gap between existing bridges, and it is difficult to uniformly apply a predetermined waterproof film beyond the narrow area, resulting in many variations in the performance of the applied waterproof layer. There was a point.

As described above, as a construction method for girder end waterproofing, a spray coating method using air and an airless spray machine and a coating method using a roller are used.

The spray coating method is efficient, but besides the basic problem that the coating material scatters and easily contaminates the surrounding area, it is not possible to provide a sufficient distance between the spray nozzle and the spray surface in a narrow gap. Therefore, there are problems that coating spots and pinholes are easily generated and the coating film thickness is difficult to manage.

On the other hand, since the roller coating method is performed by attaching a 3 to 4 m joint pattern, it is difficult to adhere to the coating surface because there is no force applied to the coating roller when coating the back of the gap part. The required amount (film thickness) of waterproof material cannot be applied without pinholes. In addition, there is a problem that the work efficiency is poor because it is an operation of handling a roller with a long handle.

The present invention has been made in view of the above-mentioned prior art, and there is no abnormal application situation with respect to the application method of the canyon part including the construction of the girder end waterproofing, and the work efficiency is remarkably increased. It aims at providing the coating method which can be performed.

The present invention is a coating jig in which a plurality of application portions each including a coating roller and a support rod for supporting the coating roller are provided on one fixed portion, and the coating portions are relative to each other. The application jig is preferably combined so that the size of the space formed by the application part can be changed by changing the position of the application part, preferably two application parts and two application rollers. The above-mentioned application jig is characterized in that both support rods are coupled by a spring so that the distance between them can be changed, and more preferably, the application material is fed to two rollers. The application jig is capable of continuous application operation.

In addition, the present invention uses the above-described application jig to reduce the distance between the two rollers when inserting the gap between the canals, and widens the interval between the two rollers when inserted into the application location. A method for applying the inter-gorge part, wherein the inter-gorge part is a girder end portion of the bridge, and the material to be applied is a waterproof material. Is the method.

Since the application jig of the present invention is coupled so that the position of a plurality of application parts can be changed relative to each other to change the size of the space formed by the application parts, Since it is easy to easily follow a complex-shaped application surface, it is difficult to form an abnormality such as smears or pinholes on the complex-shaped surface. In a preferred embodiment, two applications are applied. Since the support rods of the two are joined by a spring so that the distance between the two coating rollers can be changed, when inserting into the canyon, it can be adjusted to the size of the canyon Since the distance between the rollers changes, the opposite surfaces of the canyon can be applied with almost no smears or pinholes. Furthermore, the coating jig of the present invention is preferably configured so that the coating material is fed to two rollers and can be continuously applied. It has the feature that it can be made continuous with almost no generation of holes or the like.

In addition, since the coating method of the present invention uses the coating jig having the above-described characteristics, a necessary and sufficient pressing force is applied to the coating roller by the action of the spring during coating, so that the unevenness of the coating surface is applied. It can be applied while following the roller to the part, and can be applied to the canyon part with almost no abnormalities such as smears and pinholes, and when using the application jig with the above characteristics It is possible to work with less labor, and it is easy to work even at high places, so it can be greatly improved in terms of work efficiency, so it is suitable as a coating method for the canyon part of the bridge end of the bridge .

The coating jig of the present invention will be described based on the drawings. As shown in FIGS. 1 and 2, the application jig of the present invention has an application part comprising an application roller 2 and a support bar 3 for supporting the application roller on one fixed part 1. A plurality of coating jigs are provided, which are coupled so that the positions of the application portions can be relatively changed to change the size of the space formed by the application portions. 1 and 2 show the case where the number of the application portions is two, three or more may be provided. Since a plurality of application portions whose positions can be changed with each other are provided in one fixed portion 1, it is possible to easily apply uneven surfaces by operating the fixed portion 1. At this time, since the application portions are coupled to each other at the support rod 3, the application portions are connected to each other and operated when inserted in a narrow place, which is suitable for application to the canyon portion.

FIGS. 1 and 2 also show that there are two application portions, and the support rods of the two application portions are coupled by a spring so that the distance between the application rollers of the two application portions can be changed. Illustrated. In FIG. 1, two application rollers are respectively supported at both ends by a support bar, and in FIG. 2, two application rollers are respectively supported by one end by a support bar. In FIG. 2, the two coating rollers are supported by the support rods from different directions, but may be from the same direction.

The arrangement of the two rollers is not particularly limited, and there is no problem if the application rollers are arranged at substantially the same position or slightly shifted as shown in FIGS. The coating roller illustrated in FIG. 1 is preferable for painting a relatively wide gap portion, and the coating roller illustrated in FIG. 2 is preferably used for painting a relatively narrow gap portion.

In the present invention, the type of the spring acting between the support rods of the two application rollers is not limited. In addition, a leaf spring, a coiled spring, a cylinder operated by air pressure, or the like can be used.

The material of the support rod of the coating roller is not particularly limited, but a stainless support rod is preferable because it is washed with an organic solvent at the end of the operation.

Further, in the present invention, although not shown, it is preferable to carry out through a support bar when the coating material is continuously supplied to the coating roller.

The coating method of the present invention is characterized in that the above-mentioned coating jig is used, and further, when inserted into the canyon part, the distance between the two coating rollers is shortened and inserted at the coating location. It is characterized by widening the distance between the individual rollers and bringing them into close contact with the canyon.

In the coating jig of the present invention, since the two coating portions are connected by a spring, the interval between the two coating rollers is temporarily reduced using a lock jig or the like and inserted into a narrow gap portion. When operating with a fixed part so that each of the two painting rollers is in contact with the opposite surface of the gap portion, the painting roller is pressed against the opposite surface by the force of the spring, so that smears, pinholes, etc. It has a feature that can be applied without any abnormalities.

Furthermore, the coating method of the present invention can be greatly improved in terms of work efficiency, such as being able to work with less labor when using the above-mentioned coating jig having the characteristics, and facilitating work even at high places. It is characterized in that it is suitable as a coating method for the inter-strait part of the bridge end portion of the bridge.

Since the application method of the present invention uses the above-described application jig, it is effective when applied to a canyon part that is difficult to work, such as a high place and a mountainous part, and is more difficult to work, It can be used for various purposes other than coating waterproof materials on the canyons at the bridge end of the bridge. Examples of this include application of a rust inhibitor to a steel bridge, application of an impregnating agent to a concrete structure, and the like.

Prepare two L-shaped retaining walls with a width of 2m and a height of 1.8m. After marking the horizontal line at the position of 1m and 1.5m from the bottom of the vertical surface, set them facing each other so that the width becomes 100mm. And prepared a simulated play section.

Next, a small roller C12 (6 inches) manufactured by Otsuka Brush Manufacturing Co., Ltd. was prepared by attaching a 1.5 m long joint pattern, and this was used as a primer. "DKK550-003" was applied in an amount of 0.2 kg / m ² on the simulated gap.

After leaving for about 30 minutes and confirming that “DKK550-003” is sufficiently impregnated, add it to 1 kg of A agent of girder-end waterproofing material “Keta Coat 1” manufactured by Denki Kagaku Kogyo Co., Ltd. in an amount ratio of 20 g of B agent. Stir well until the color is uniform.

Next, using the jig for painting shown in FIG. 1, which is equipped with two Otsuka Brush Manufacturing Co., Ltd. sand aggregate small rollers (extra fine) and attached with a 3.5 m joint pattern, a retaining wall A range where marking of the simulated gap portion was applied from a position 1.5 m away from the coating was applied. The film thickness was measured with a wet gauge, and the coating was repeated three times until the film thickness became 0.8 mm or more.

After being left overnight, the retaining wall was removed, and the presence or absence of pinholes and coating spots were visually confirmed. At the same time, the film thickness at five locations was measured with an ultrasonic film thickness meter positive detector 100 manufactured by Defresco. The results are shown in Table 1.

About the retaining wall used in Example 1, the waterproof material was removed by sandblasting, marking was performed in the same manner as in Example 1, and then set facing each other so as to be 50 mm in width to prepare a simulated play space.

Next, as in Example 1, hard rock 2 “DK550-003” was applied as a primer.

Set the two sand aggregate small rollers (extra fine) made by Otsuka Brush Manufacturing Co., Ltd., and prepare the application jig shown in FIG. The girder end waterproof material Ketacoat 1 was applied in the same procedure as in Example 1. In the same manner as in Example 1, after being left overnight and completely cured, the presence or absence of pinholes, the presence or absence of smears, and the film thickness measurement with an ultrasonic film thickness meter were performed.

A simulated play with a width of 20 mm was created in the same procedure as in Example 2, and after applying “DK550-003” as a primer, Ketacoat 1 manufactured by Denki Kagaku Kogyo Co., Ltd. was applied using the same application jig as in Example 2. The presence or absence of pinholes and the presence of coating spots were confirmed. Furthermore, the film thickness was measured with an ultrasonic film thickness meter.

In order to make it easy to insert the gap between the gaps as a coating jig, the two coating rollers shown in FIG. 2 were narrowed and locked, and a coating jig equipped with a device for releasing the lock by hand operation at a predetermined location was used. Except for this, a waterproof material was applied in the same manner as in Example 2 and evaluated.

(Comparative Example 1) In Example 1, the coating jig for applying the Ketacoat 1 manufactured by Denki Kagaku Kogyo Co., Ltd. used one Otsuka Brush Manufacturing Co., Ltd. sandbone small roller (very fine). The application and the evaluation after application were performed in the same procedure except that an application jig having a 5 m joint pattern was used.

(Comparative Example 2) As in Comparative Example 1, the coating was performed in the same manner as in Comparative Example 1 except that the roller for applying the digit coat 1 was one sandbone small roller (extra fine).

(Comparative Example 3) As in Comparative Examples 1 and 2, coating and evaluation were performed in the same manner as in Example 3 except that the roller was one sandbone small roller (extra fine).

The coating jig of the present invention easily follows a complex-shaped coating surface such as an uneven surface or a void portion, and when inserted into the canyon portion, the distance between the rollers changes according to the size of the canyon portion. Therefore, it is possible to apply the coating on the opposite faces of the canyon part with almost no occurrence of smears or pinholes, and further, it is possible to apply continuously by feeding the liquid to the roller. Therefore, the coating method of the present invention using the coating jig having the above-described features has a feature that it can be made continuous with almost no occurrence of smears or pinholes. In addition, it is possible to work with less labor, and it is easier to work even in high places. As applicable to many uses , It is very useful on the industry.

The figure which shows an example of the jig | tool for coating which concerns on Claim 2 of this application. The figure which shows another example of the jig | tool for coating which concerns on Claim 2 of this application.

Explanation of symbols

1 Application roller 2 Support rod 3 Spring 4 Fixed part

Claims (5)

A coating jig provided with a plurality of application parts each consisting of an application roller and a support rod for supporting the application roller on one fixed part, the application parts relatively changing position. The application jig is characterized by being coupled so that the size of the space formed by the application part can be changed. The coating treatment according to claim 1, wherein the coating rod has two coating portions and the support rods are coupled by a spring so that the distance between the two coating rollers can be changed. Ingredients. The coating jig according to claim 2, wherein the coating material is fed to two rollers and can be continuously coated. Using the application jig according to claim 2 or claim 3, when inserting the gap between the two rollers, the distance between the two rollers is reduced and the distance between the two rollers is increased when the gap is inserted into the application location. A method for applying the inter-gorge part, characterized in that it is in close contact with the inter-gorge part. 5. The coating method according to claim 4, wherein the canyon portion is a beam end portion of a bridge, and a material to be applied is a waterproof material.

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