JPH0358413B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a connection mechanism for a split anti-corrosion cover used to coat and protect existing steel pipes such as pier supports.

[Prior art]

It is known that steel pipes such as pier supports found in ports and harbors are subject to intensive corrosion in their tidal and splash areas due to the action of macro batteries. In order to prevent this corrosion, a conventional practice has been to cover the steel pipe with a corrosion-resistant cover such as F.R.P., and to inject and harden a filling material such as mortar or concrete between the steel pipe and the cover.

However, in the case of an existing steel pipe, concrete has already been constructed above the steel pipe, so the cylindrical cover cannot be inserted into the steel pipe. As a solution to this problem, a structure is often used in which the anti-corrosion cover is divided into a pair of halves, a flange extending in the longitudinal direction is formed on each end edge, and the flanges are connected by facing each cover half from the outside of the steel pipe. ing. but,
This structure not only requires a large number of bolts to be tightened when connecting the flanges, but also allows floating objects and waves to act on the flanges that protrude from the cover.

On the other hand, attempts have been made to eliminate the flanges of the anti-corrosion cover and overlap the edges of the covers, but this makes tightening bolts extremely difficult during connection.

[Purpose of the invention]

The present invention has been made in view of the above circumstances, and its purpose is to connect split anti-corrosion covers so that a worker can easily connect the cover edges on site without the need for flanges or bolt tightening. The goal is to provide a mechanism.

[Summary of the invention]

In order to achieve the above object, the present invention is configured such that a male member is fixed to one end edge of the cover and a female member is fixed to the other end edge of the cover so that they are elastically engaged simply by butting both end edges together.

A plurality of interlocking teeth are formed on the male member and the female member, and each tooth is inclined in a direction that prevents both members from falling out.

[Embodiments of the invention]

FIG. 1 shows an anti-corrosion cover 10 that employs the coupling mechanism of the present invention.

The anti-corrosion cover 10 is made of a corrosion-resistant material such as F.R.P, and is composed of a pair of semicircular cover halves 10a and 10b, as can be seen from FIG. The longitudinal dimension of each cover half 10a, 10b is set so that the ebb and flow area and the splash area of the steel pipe 12 can be sufficiently covered.

Hanging fittings 14 are connected to the upper inner surfaces of the cover halves 10a, 10b, and by welding each hanging fitting 14 to the steel pipe 12, the anticorrosive cover 10 is supported in a predetermined position. Although not shown, steel pipe 1
2, install a pedestal in the underwater part and install the anti-corrosion cover 10.
It may be structured to support the lower end of. Concrete 16 is constructed above the steel pipe 12, forming one pier as a whole.

As shown in FIGS. 2 and 4, a male member 20 is connected to the edge 18a of the cover half 10, and a female member 22 is connected to the edge 19a. The proximal end of the male member 20 is forked and has a cover edge 18.
a, and a plurality of teeth 24 are formed on the distal end side. On the other hand, the female member 22 has a bifurcated proximal end and fits into the cover edge 19a, and has a groove 2 on the distal end.
8 (FIG. 4) and a plurality of internal teeth 26 are carved on the exit side of the groove 28.

Furthermore, a similar male member 20 is also provided on the edge 18b of the cover half 10b, and a female member 20 is provided on the edge 19b.
2 is fixed. Therefore, as can be seen from the figure, the male member 20 and the female member 22 face each other, and when they are engaged, the cover halves 10a, 10
b consists of a cylindrical anti-corrosion cover. Further, with this configuration, it is possible to mass-produce cover halves having exactly the same shape.

Teeth 24 of male member 20 and internal teeth 2 of female member 22
6 is provided at an angle, so once both teeth are in occlusion, there is no need to pull them out. Since the internal teeth 26 of the female member 22 are provided on the opening side of the grooves 28, the grooves 28 are easily deformed and expanded when they engage with the teeth 24.

Male member 20 and female member 22 are preferably constructed from a material having a certain strength and flexibility, such as glass fiber strength nylon 6. The longitudinal dimension of the male member 20 and the female member 22 is approximately equal to the vertical dimension of the anti-corrosion cover 10, and the groove 28
is also formed over the entire length of the female member 22.
It is desirable to make the bonding surfaces between each cover edge 18a, 19a, 18b, 19b and the male member 20 and female member 22 as wide as possible to increase the adhesion force between each member.

The anti-corrosion cover 10 of this embodiment is constructed in the following order. First, the steel pipe 12 is covered with the cover halves 10a and 10b facing each other, and the male member 20 and the female member 22 are engaged to connect the cover edges 18a, 19b, 18b, and 19a.
Next, the vertical position of the anti-corrosion cover 10 is adjusted so as to completely cover the ebb and flow area and the splash area of the steel pipe 12, and then the hanging fitting 14 above the cover is welded to the steel pipe 12. Finally, a filler 30 such as mortar is injected between the anti-corrosion cover 10 and the steel pipe 12 and solidified.

Although not shown, since a predetermined annular seal is provided between the bottom of the anti-corrosion cover 10 and the steel pipe 12, there is no fear that the filler 30 will leak from under the anti-corrosion cover 10.

FIG. 3 shows an example in which the coupling mechanism of the present invention is applied to a cylindrical anti-corrosion cover 10 that is split at only one place. In this case, only one male member 20 and one female member 22 are required, and the other configurations are substantially the same as in the previous embodiment. Moreover, this type of anti-corrosion cover 10 is
Once the cover edges 18 and 19 are pushed open, the steel pipe 12
The installation will be carried out. The rest of the construction order is the same as in the previous example.

〔Effect of the invention〕

As explained above, according to the connection mechanism of the present invention, it is possible to connect split type anti-corrosion covers without requiring work such as bolt tightening, and since the flange of the anti-corrosion cover is omitted, even if the cover is split type, it can be completely connected. A cylindrical cover is obtained.

[Brief explanation of drawings]

Fig. 1 is a side view showing the installation state of a split anti-corrosion cover that employs the coupling mechanism of the present invention, Fig. 2 is a sectional view taken along the line shown in Fig. 1, and Fig. 3 shows a different type of anti-corrosion cover. FIG. 2 is a sectional view similar to FIG. 2, and FIG. 4 is an enlarged sectional view showing a connecting portion of the anti-corrosion cover. 10... Corrosion protection cover, 10a, 10b... Cover half, 12... Steel pipe, 18, 18a, 18b,
19, 19a, 19b...Cover edge, 20...
Male member, 22...Female member, 24...Teeth, 26
...internal teeth.

Claims (1)

[Scope of Claims] 1. In a connection mechanism for a split type anti-corrosion cover that is used to cover the ebb and flow area and splash area of an existing steel pipe from the outside and does not have a connection flange, a male member is attached to one end edge of the cover. A connecting mechanism for a split anti-corrosion cover, characterized in that a female member is fixed to the other edge so that both cover edges can be elastically engaged. 2. The connection mechanism for a split anti-corrosion cover according to claim 1, wherein the male member and the female member are provided with interlocking teeth that prevent the cover from falling off after the end edges of the cover are joined.