JPH0420608A - Replacing method for metallic door stop - Google Patents

Abstract

PURPOSE:To facilitate work by fusing a metallic door stop to a specified dimension, to peel it off a concrete gate column in order, and by grinding the peeled- off surface of the gate column, to fill up a gap between a renewed fitted door stop the column gate, with liquid-like adhesives. CONSTITUTION:A ready-set metallic door stop is fused to a specified dimension, and is peeled off a concrete gate column 20. After that, the peeled-off surface of the gate column 20 is ground, and a renewed metallic door stop 10n is fitted on the gate column 20, and except the upper partial section of the door stop 10n, the side surface and bottom surface are sealed with joint sealing agent 50. After that, a gap 40 between the renewed metallic door stop 10n and the gate column 20 is filled up with liquid-like adhesives for injection through the upper partial section, and is sealed. As a result, the safety of work can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a method for replacing a metal door stop embedded in a concrete gate post.

[Prior Art] In a concrete gatepost as illustrated in Fig. 5,
In order to guide the gate G and maintain high watertightness, a metal door stop M is buried in the door stop. This metal door stop M is subject to severe corrosion due to its harsh environment in terms of humidity, temperature, etc., and construction work is required to replace the existing metal door stop M with a new metal door stop.

The conventional method of replacing a metal doorstop is as shown in Figure 5, by grinding down the existing concrete gate post around which the metal doorstop M is buried, taking out the metal doorstop, and applying secondary concrete to the ground part. We are pouring concrete and installing new metal doorstops.

In addition, in Figure 5 above, the concrete gatepost is simply illustrated to make the content of the grinding work clear, but in reality, as shown in Figure 6, all four sides that come into contact with the gate G are A metal door stop M of a predetermined shape is embedded in the concrete to improve watertightness. When replacing any of the metal doorstops M on the four sides, as described above, a considerable portion of the concrete in which the metal doorstops M are buried is polished and secondary concrete is poured. has been adopted.

[Problems to be Solved by the Invention] It is also possible to replace the existing metal door stop M with a new metal door stop using the conventional metal door stop replacement method. However, the method of replacing the metal doorstops was difficult and involved many problems, as follows: First, the process of sharpening the existing concrete gateposts was as dangerous as normal sawing work. In addition, it is difficult to dispose of the waste concrete pieces that are discharged from the cutting work, and furthermore, water becomes a hindrance to the work, so it is necessary to use a large number of sandbags to stop the water.

In addition, in the so-called secondary concrete joining process, which replenishes the concrete parts removed by grinding, it takes time and effort to create formwork, and it is difficult to obtain the small amount of concrete needed for distribution. There are problems such as the fact that it is difficult due to actual circumstances.

Moreover, even if the replacement of the metal door stop is completed, the grinding work places an excessive burden on the frame of the concrete gatepost, making it weaker. As a result, the connection with the secondary concrete may be incomplete, cracks may occur, and sufficient strength may not be obtained.The present invention was made to solve the above problems, and is a safe and simple method. A new method for replacing metal door stops that is economical, labor-saving, and strong, that allows metal door stops to be replaced by work, and that maintains high retention strength after replacement. is intended to provide.

[Means for Solving the Problems] In order to solve the above problems, the present invention provides a method for replacing a metal door stop embedded in a concrete gate post, which includes: Cut it to a predetermined size and peel it off from the concrete gatepost one by one, polish the peeled surface of the concrete gatepost, attach a new metal doorstop to the concrete gatepost, and replace the side and bottom surfaces with concrete except for a part of the top. A metal door, characterized in that: a liquid adhesive is injected into the gap between the new metal doorstop and the concrete gatepost from a part of the upper part, and the part of the upper part is sealed. The gist is how to replace the hit.

[Function] According to the metal door stop replacement method of the present invention, the existing metal door stop is melt-cut to a predetermined size and sequentially peeled off from the concrete gatepost, so no grinding work is required. For this reason, work safety is high, and no stress is placed on the frame of the concrete gatepost.

Note that thermal melting using a gouging torch and carbon in combination with a near compressor and an engine welder is suitable for melting the metal doorstop and not giving a thermal shock to the concrete frame. Further, the predetermined size for fusing is determined by the material and wall thickness of the metal doorstop to be peeled off so that the work of separating the metal doorstop shredded by fusing by ≠1 becomes easy.

Next, the peeled surface of the metal door stop of the concrete gatepost is polished, and only the peeled surface is cleaned and a new surface with sufficient mechanical strength is scraped.

Then, a new metal doorstop is attached to the concrete gatepost, and the sides and bottom of the concrete gatepost and the metal doorstop are sealed except for the upper part. The reason why a part of the upper part is removed is to secure an inlet for liquid adhesive, which will be described later. In addition, sealing both members at the side and bottom surfaces is
This is to prevent the liquid adhesive from flowing out and being wasted.

After that, liquid adhesive is injected into the gap between the new metal doorstop and the concrete gatepost from the part of the top that was not sealed, and the part of the top that was used as the injection port is sealed. Complete the winning exchange.

This allows the new metal door stop to become completely integrated with the concrete gate post. The liquid adhesive also has the effect of infiltrating minute cracks in concrete gateposts and reinforcing them.

EXAMPLES Hereinafter, in order to more specifically explain the metal door stop replacement method of the present invention, examples will be given and described in detail.

[Example] FIGS. 1 to 4 are explanatory diagrams for explaining the implementation process of a method for replacing a metal door stop, which is an example of the present invention.

First, if there is excess water at the beginning of the work, use the required number of sandbags to prevent water from entering only the part necessary for the work, that is, the part where the metal door stopper 10° is buried (see Figure 1). .

Next, using carbon with a gouging torch, the metal door stopper 10o is fused to a predetermined size.

At this time, if compressed air is sprayed onto the stripping work surface using a near compressor, the concrete gate post 20 can be further protected from thermal shock.

The material of the metal door stop 10o in this example is JIS standard 5
Since it is S41 and its wall thickness is 6 mm to 9 mm,
An efficient method is to melt the metal door stopper 10° vertically and horizontally at intervals of several hundred mm and peel it off using a chisel or the like.

FIG. 2 is an enlarged plan view of the buried portion of the metal door stop 10o, in which the peeled-off portion of the metal door stop 10o is shaded. As shown in the figure, in this embodiment, only the portion of the upper metal door stop 10o that requires replacement is peeled off.

After the peeling of the metal doorstop 100 is completed in this way, the peeled surface of the concrete gatepost 20 is polished, but in this example, a well-known hole-in anchor 30 is used for temporary fixing of the new metal doorstop Ion, which will be described later. . In addition, in this example, JIS standard 5uS3 is used as the hole-in anchor.
Use 04. Therefore, prior to polishing the peeled surface, the hole-in anchor 30 is set in a predetermined position on the peeled surface (see FIG. 3), and then the peeled surface is polished.

Here, the purpose of polishing is to clean the peeled surface of the concrete and to maintain the strength of adhesion and bonding, which will be described later, so it is sufficient to polish a few mm to a few mm from the surface. Therefore,
It can be easily carried out using an air chipper, etc., and the polishing process is completed by drying after chipping and cleaning.

Next, as shown in Figures 3 and 4, the new metal doorstop Ion is attached to the hole-in anchor 30 that has been cast in advance, and temporarily fixed with a certain gap 40 between it and the polished surface of the concrete gatepost. . For temporary fixing, after temporarily tightening the metal door stop Ion with a known installation jig, the centering position is determined, and then the gap between the metal door stop Ion and the hole-in anchor 30 is fixed as shown in Fig. 3. Complete by welding 40.

Subsequently, as shown in FIG. 4, the joints between the side and bottom surfaces of the temporarily fixed metal doorstop and the concrete gate post 20 are sealed with a joint sealant 50.

In this way, after preventing leakage of the liquid adhesive when it is injected into the gap 40, the liquid adhesive is injected into the gap 40 from the upper end of the metal door stopper 10n, and as the adhesive hardens, the metal The installation of the doorstop Ion is completed.

Finally, the protruding part of the hole-in anchor 30 protruding from the metal doorstop Ion (the shaded part in Fig. 3) and the welding part 60 (see Fig. 3) are finished with a smooth surface, and as necessary. Accordingly, we will reliably repair joints and other areas where there is a risk of water leakage using filler, and complete the replacement of the metal door stop.

According to the method for replacing a metal door stop according to the present embodiment, which is performed according to the above steps, the following effects are obvious.

First, compared to conventional construction methods, there is no need for grinding work or secondary concrete pouring.

Therefore, the replacement work can be carried out safely, the formwork work associated with pouring secondary concrete becomes unnecessary, and the work can be completed easily and quickly. Moreover, large amounts of concrete pieces, which are industrial waste, are not generated, and the work can be carried out by simply changing the direction of water flow using a few sandbags. Additionally, work can be carried out safely and reliably even on aged concrete gateposts.

Furthermore, in order to inject and fill the gap 40 between the concrete gatepost 20 and the new metal doorstop Ion with liquid adhesive,
Even if there are cracks or other gaps in the existing concrete, this agent can flow in and strengthen the existing concrete.

In addition, in the above embodiment, explanation has been given regarding the replacement of the metal door stop erected on the concrete gate post 20, but the above embodiment can also be used to replace the metal door stop on any of the four sides as shown in FIG. It is clear that similar methods can be applied and produce similar effects.

[Effects of the Invention] As described in detail with examples, the metal door stop replacement method of the present invention involves cutting an existing metal door stop to a predetermined size and peeling it off from the concrete gate post, and replacing it with a new metal door stop. This is a method of attaching doorstops using liquid adhesive.

Therefore, the work can be completed safely and easily.

Moreover, since no mechanical stress is placed on the existing concrete, the metal doorstop has high retention strength after replacement, and can be further reinforced with liquid adhesive. This makes it possible to replace the metal door stop economically, quickly, and reliably.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of the external appearance of a concrete gate post to which an embodiment of the present invention is applied, Fig. 2 is an explanatory diagram of the peeled part of the metal doorstop that peels off in the embodiment, and Figs. 3 and 4 are explanatory diagrams of the peeled part of the metal FIG. 5 is an explanatory diagram of a state in which a manufactured door stop is temporarily fixed, FIG. 5 is an explanatory diagram of a conventional method for replacing a metal door stop, and FIG. 6 is an explanatory diagram of a buried location of a metal door stop. ]00... Existing metal doorstop Ion... New metal doorstop 20... Concrete gatepost 30... Hole-in anchor 40... Gap 50... Joint sealant

Claims (1)

[Scope of Claims] 1. A metal door stop replacement method for replacing a metal door stop buried in a concrete gate post, comprising: cutting the metal door stop to a predetermined size and sequentially peeling it from the concrete gate post; Polish the peeled surface of the gate post, attach a new metal door stop to the concrete gate post, seal the sides and bottom to the concrete gate post except for the upper part, and install the new metal door from the upper part. A method for replacing a metal door stop, which comprises injecting and filling a liquid adhesive into the gap between the stop and the concrete gate post to seal a portion of the upper part.