JP2507099Y2 - Pontoon joint Water-stop packing - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a joint water-stop packing for a pontoon that constitutes a floating structure, and more specifically, a joint water-stop used for a joint surface joint part of a pontoon. It is related to packing.

[Conventional technology]

Conventionally, various floating bodies that float above the sea have been used as artificial grounds for offshore structures.

As this floating body, a plurality of pontoons are generally joined and used. There are cases where the pontoons are joined in advance by using a fastening means such as a rivet on land or at sea.

[Problems to be solved by the invention]

However, when joining pontoons on land, various equipment and places are required, and there is a problem in that after the floating body is constructed, it must be transported to the sea.

On the other hand, as shown in FIG. 3, when joining the pontoon 1 at sea W, the joining surface joint portion 2 of the pontoon 1 may be located on the water surface, but the joining surface joint portion 2 using the fastening bolts is preferable. In the case of a large pontoon 1 located in the sea, as shown in FIGS. 4 and 5, water may be generated from the bolt hole portion of the joint surface joint portion 2 to make the bolt fastening work difficult, or When the fastening bolt 6 is inserted into the rubber packing 5 provided through the pressing plate 3 and the washer 4 in the bolt hole for tightening and fixing, the rubber packing 5 is cracked.
There was a problem that seawater invaded from this cracked portion.

As another conventional example, when joining pontoons,
Work is performed by pulling each pontoon, but at this time, a recess is formed in the joint surface joint part of the pontoon, and a sealing material made of a cylindrical elastic body is interposed in this recess and tightened by fastening bolts. That is, when pulling each pontoon as described above, the tubular sealing material is compressed and deformed, the pontoon is apt to laterally shift, and the sealing material buckles due to sideways falling, making it difficult to insert the fastening bolt. However, there was a problem that it became difficult to join the pontoons.

[Purpose of device]

This invention has been devised in view of such conventional problems, facilitates the connection work of the pontoon at sea, and effectively prevents water from entering the pontoon from the bolt insertion portion, It is another object of the present invention to provide a water seal for a pontoon joint in which water can be effectively stopped without causing cracks or the like in the rubber packing when the fastening bolt is inserted.

[Means for solving the problem]

In order to achieve the above object, this invention forms a portion corresponding to a bolt insertion portion of a rubber packing that covers the bolt insertion hole into a thin portion that can withstand water pressure, and changes the diameter of the thin portion to the outside of the fastening bolt. The gist is to set the diameter approximately the same as the diameter.

[Function of device]

This invention is configured as described above, when pulling a pontoon at sea and connecting and joining it, when inserting the fastening bolt from the inside of the pontoon into the bolt insertion hole, the thin portion of the rubber packing is torn by the tip of the fastening bolt. By making the thin-walled portion of the torn rubber packing closely adhere to the outer peripheral surface of the fastening bolt, it is possible to effectively prevent water from entering the pontoon through the bolt insertion hole.

[Example of device]

Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.

The same components as those in the conventional example are designated by the same reference numerals and the description thereof will be omitted.

FIG. 1 is a sectional view of a joint surface joint portion 2 of a pontoon 1 according to the present invention, and FIG. 2 is a sectional view of a rubber packing 7 through which a fastening bolt 8 is passed. As shown in FIG. 1, the plate-like rubber packing 7 having a predetermined plate thickness t ₁ is formed by covering the side surface of the joint surface joint portion 2 with the bolt insertion hole 9 having a predetermined hole diameter D _1. It is water-tightly fixed via a pressing member 10 and a plurality of bolts 11.

Further, the rubber packing 7 is formed in a thin portion 12 having a plate thickness t ₂ capable of withstanding water pressure at a central portion corresponding to the bolt insertion hole 9. The diameter D ₃ of the thin portion 12 is the outer diameter D of the fastening bolt 8. The diameter is set to be approximately the same as or smaller than ₂ .

Further, the plate thickness t ₁ of the rubber packing 7 is preferably half or less of the difference between the hole diameter D ₁ of the bolt insertion hole 9 and the outer diameter D ₂ of the fastening bolt 8. That is, if the plate thickness t ₁ of the rubber packing 7 is too thick, the workability of inserting the fastening bolt 8 becomes extremely poor. Further, the plate thickness t ₂ of the thin portion 12 is a thickness that does not easily break due to water pressure or the like, that is,
It is preferable that the thickness of the rubber packing 7 is 1 mm or more and the thickness t ₁ or less of the rubber packing 7.

The tip 8a of the fastening bolt 8 is formed in a conical shape so that the thin portion 12 can be easily torn when it is inserted into the rubber packing 7.

Since the embodiment according to the present invention is configured as described above, when pulling the pontoons 1 together at sea and connecting and joining the pontoons 1, the fastening bolts 8 are inserted from the inside of the pontoons 1.
2 is inserted into the bolt insertion hole 9, the thin-walled portion 12 of the rubber packing 7 is pushed and torn by the conical tip 8a of the fastening bolt 8, and the thin-walled seal portion 12a of the rubber packing 7 torn is shown in FIG. As described above, by closely contacting the outer peripheral surface of the fastening bolt 8 and by closely contacting the plate thickness t ₁ portion (portion not torn) of the rubber packing 7 with the outer peripheral surface of the fastening bolt 8,
Water can be effectively prevented from entering the pontoon 1 from the bolt insertion hole 9.

Further, even when the thin-walled portion 12 of the rubber packing 7 is torn by the conical tip 8a of the fastening bolt 8, the thin-walled portion 12 of the rubber packing 7 can be retained within the defined thin-walled portion 12, and thus the thin-walled portion that has been torn apart The seal portion 12a is curved along the outer peripheral surface of the fastening bolt 8 and is in close contact with the fastening bolt 8 while being able to effectively prevent intrusion of water from the outside.

Further, the thin portion 12 can withstand the water pressure when the fastening bolt 8 is inserted, but it can be easily broken by the insertion pressure of the fastening bolt 8, so that the pontoon 1 can be easily joined and joined.

[Effect of device]

In this invention, the portion corresponding to the bolt insertion portion of the rubber packing that covers the bolt insertion hole is formed as a thin portion that can withstand water pressure as described above, and the diameter of this thin portion is the outer diameter of the fastening bolt. Since the diameter is set to be substantially the same, the following excellent effects are exhibited.

(A). By making the thin-walled seal portion of the rubber packing closely adhere to the outer peripheral surface of the fastening bolt, it is possible to effectively prevent water from entering the pontoon through the bolt insertion hole.

(B). When the thin-walled part of the rubber packing is torn by the conical tip of the fastening bolt, it can be retained within the thin-walled part of the rubber packing, and the thin-walled seal part that is torn is curved along the outer peripheral surface of the fastening bolt. However, they are in close contact and can effectively prevent the ingress of water from the outside.

(C). Also, although it can withstand water pressure when inserting the fastening bolt, it can easily tear with the insertion pressure of the fastening bolt,
The pontoons can be connected and joined easily, and the workability can be improved.

(D). Since the rubber packing has a simple structure, it can be manufactured at low cost and can be easily maintained.

[Brief description of drawings]

FIG. 1 is a sectional view of a joint surface joint portion of a pontoon embodying the present invention, FIG. 2 is a sectional view of a rubber packing through a fastening bolt, and FIG. 3 is a perspective view of a conventional constructed pontoon. FIG. 1 is a side view of a joint surface joint portion of a conventional pontoon, and FIG. 5 is a sectional view of a joint surface joint portion of a conventional pontoon. 1 ... Pontoon, 2 ... Joining surface joint, 7 ... Rubber packing, 8 ... Fastening bolt, 9 ... Bolt insertion hole, 11 ...
… Bolts, 12… thin-walled parts.

Claims (1)

(57) [Scope of utility model registration request] Claim: What is claimed is: 1. A bolt insertion hole is formed in each joint surface joint portion of the pontoon, and a fastening bolt is inserted into the bolt insertion hole through a plate-like rubber packing made of a rubber-like elastic body so that the pontoons are mutually connected. In the pontoon joint watertight packing that is fixed by tightening, a portion corresponding to the bolt insertion portion of the rubber packing that covers the bolt insertion hole is formed into a thin portion that can withstand water pressure, and the diameter of this thin portion is A pontoon joint water-stop packing, which has a diameter substantially equal to the outer diameter of the fastening bolt.