JPS583467Y2 - Jig for pulling out underwater piles - Google Patents

Description

[Detailed description of the invention] This invention relates to a jig for pulling out underwater piles.
In particular, the present invention relates to a jig that is most suitable for pulling out props for glue farming nets.

Conventionally, bamboo has been used for the supports for glue aquaculture nets (hereinafter referred to as glue supports), but bamboo supports are prone to corrosion and have knots, making it difficult to work when raising and lowering the glue nets according to the tide level. Furthermore, there was a drawback that one with a uniform shape was not available.

However, in recent years, glue supports made of plastic or FRP have been used to overcome all of the drawbacks of these bamboo supports.

Generally, seaweed farms are used as fishing grounds outside of the cultivation season, so it is necessary to remove the seaweed supports outside of the cultivation season.

However, the length of the glue pole is 4 to 10 m, and the lower end is buried in the seabed to a depth of 1 to 2 m to prevent it from falling off or falling due to swaying by tides or wind. The soil on the ocean floor has solidified because it has been left alone for several months.

Therefore, when pulling out this fish outside of the cultivation season, 300
A tensile force of ~500 kg is required.

Transferring such tensile forces to the glue post is a requirement for the extraction jig.

Normally, the work of pulling out glue struts is carried out from a swaying work boat, so the pulling jig can be easily attached to and detached from the glue struts.Also, since it is pulled in several steps over a length of 1 to 2 m, the tensile strength When you are not standing upright, you need to instantly slide down to the base of the support post.

In addition, depending on the tidal conditions, the jig must have a simple mechanism so that work can be done even in low light at night, and it must be safe even after pulling out hundreds to thousands of times. is required.

The conventional gluing post pull-out jig j is shown in Figs. 1 to 7.
As shown in the figure, a metal chain 1 with a metal split ring 2 welded to the end was used.

FIG. 2 is an enlarged view of the chain 1 shown in FIG.

When pulling out the glue post P using this jig j, use the third
As shown in Fig. 4, the chain 1 of the jig j is wrapped around the glue support P once or twice, and with the chain 1 hooked around the half-split ring 2 at the end, as shown in Fig. 5, chain 1
When pulled upward by a chain winch 4 fixed to the work boat 3, the chain tightens and tightens the glue support in the radial direction, and the frictional force between the chain 1 and the glue support P transmits the force to pull the glue support upward. It is.

In the figure, 5 indicates seawater and 6 indicates the ocean floor.

In addition, the length of the chain 1 of the pulling jig j is around 1 m from the point of view of workability. For example, when pulling out the glue prop P buried 2 m in the seabed, due to the shaking of the ship 3, as mentioned above, , Move the extraction jig up and down several times to work.

However, the disadvantage of tightening the chain is that the force can cause the struts to break.

In other words, if the glue support is made of bamboo, when it is new, it will stop at the nodes of the bamboo, and the nodes are strong, so there will be no problem, but if it has been used several times, barnacles etc. will stick to it and it will cause friction with the chain 1. The force increases and the chain is fixed even at the joints.

However, areas other than the joints are weak against radial force, and
Bamboo that has been used several times loses oil and becomes brittle, so it often breaks.

Also, unlike bamboo, plastic glue posts do not have knots, so the surface is covered with a relatively soft material such as thermoplastic resin or rubber to ensure that the chain will hang securely.
Chains are easily damaged and may break depending on the conditions of pulling them out.

As shown in Fig. 2, the chain 1 used as a conventional gluing post pulling jig j has a ring a, a ring with a major diameter of about 45 to 55 mm,
l), c, d... are alternately connected at an angle of 90°.

Therefore, when pulling out the glue support P using the conventional jig j, each ring a, l), c, d...
...The contact with the support column P is as shown in Fig. 7.

That is, the diameter of the glue support P is usually 30 to 60 mm,
Since each ring a, l), c, d, etc. of the chain 1 are connected at an angle of <90° as described above, when a tensile force is applied to each ring of the chain 1, There are only 2 to 4 contact points S1 to S between the chain 1 and the glue post P, and when the chain 1 is tightened in the radial direction to the glue post P, the force is concentrated only at those contact points, so the glue post P may be destroyed. There were drawbacks.

The jig for pulling out underwater piles according to the present invention solves the drawbacks of the conventional ones.Since the jig and the pile or glue support are in surface contact rather than point contact, the tightening force can be evenly distributed. It is a jig that does not break the stakes or glue supports, does not break even if plastic items are used, and of course does not cause scratches on the support surface. A description will be given of FIGS. 1 to 16.

The jig J of the present invention is composed of half-split cylindrical bodies 11 and 11', and each half-split cylindrical body is joined by a hinge-shaped joining body 12, and each cylindrical body 11, 11' can be opened and closed. is free.

A ring-shaped body 13 is fixed along the axial direction to the upper part of the half-split cylindrical body 11, and a chain 1 as a string-shaped body is attached to the lower end.
4 is fixed.

Further, a hook 15 is fixed at right angle to the axial direction in the middle of the cylindrical body 11' in the axial direction.

In order to pull out the glue support P using this jig J, as shown in FIG. ．．
11' is opened and placed over the glue post P, and the string-like body 14 is hooked onto the hook 15 as shown in FIG.

Next, as shown in FIG. 14, when the string-shaped body 14 is lifted upward, the two half-split cylindrical bodies 11 and 11' tighten the glue support P.

At that time, tightening is done by applying force to the glue post due to the frictional force between the pull-out jig and the glue post, and when the string-like body is pulled up a certain length, the glue post can be pulled up by that length.

If it cannot be pulled out completely in one operation, removing the tensile force will eliminate the tightening force of the halved cylindrical body 11. The pull-out jig J instantly slides down toward the base of the glue post, and when a pulling force is applied again, the glue post is pulled up and the process can be repeated.

This operation is repeated several times, and when the glue support is separated from the seabed, the pulling force is removed and the string-like body 14 is removed from the hook 15, and the pulling jig J and the glue support P are separated.

Although not shown, if a spring is attached to the joined body 12 and its elastic force is constantly applied in the opening direction of each of the halved cylindrical bodies 11 and 11', the string-shaped body can be drawn out downward. case,
The pulling jig J can be instantly slid down to the base of the support column more easily.

The length of the halved cylindrical body 11.11' is preferably about 2.5 to 3.5 times the diameter of the glue support.
If it is less than double, when a tensile force is applied, the force will be applied in the axial direction of the glue support, and the glue support will become distorted.

Moreover, if it is 3.5 times or more, workability is poor.

The thickness must be at least m/m in the case of metal materials in order to have sufficient rigidity, and the inner diameter surface must be treated with anti-slip processing such as knurling to increase the frictional force with the glue support.
You will get even better results if you do this.

Further, it is preferable that the upper and lower ends are flared in a trumpet shape so that it can be easily moved along the glue support.

As shown in FIG. 8, the inner diameter d of the ring-shaped body 13 is desirably 35 m/m or more so that even a thick string-shaped body 14 such as a chain can be passed through.

The size of the ring is 13mm so that the string-like body can easily slip.
~18 m/m is desirable.

The opening l of the hook 15 is 35 to 45 m from the viewpoint of workability.
/m is desirable.

If it is less than 35m/m, the string-like object can be quickly hooked.<<If it is more than 45m/m, the string-like object 14 can be hooked onto the string-like object when setting the pulling jig J to the glue prop P and submerging it in the sea.
It comes off and cannot be pulled out.

Although the string-like body may be of any type and material, it is advantageous to use the chain block chain used in current pulling jigs because the current method can be used as is.

The overall weight of the extraction jig should be heavy so that it can be quickly sunk into the sea, but it should be 1.5 to 100 lbs. so that it can be held with one hand.
A range of 2.5 kg is good.

FIG. 15 is a plan view of the relationship between each component of the jig of the present invention and the gluing support when viewed from above, and shows the half-split cylindrical body 11.11'
When placed over the glue post P, a gap 17 is provided between the open and closed ends of the member 11.11'.

The purpose of this gap is to completely transmit the force to the support column P when the jig J is tightened.

Also, when the pulling jig J is set on the glue support P and the string-like body 14 is pulled upward, the cylindrical body 1 of the string-like body 14 is
1, 11' and the hook 15 of the string-like body 14
, the line connecting the contact point of the ring-shaped body 13 is the half-split cylindrical body 1
1. Must be outside of 11'.

Also, the function of the hook 15 is that by hooking the string-like body 14, the underwater pulling jig J is attached to the glue support P.
However, as shown in FIG. 16, the purpose of double tightening is to transmit the pulling force through the hook 15 using the pulley principle.

In other words, the purpose is to increase the frictional force and ensure the pulling operation.

In FIG. 16, 18 is an arrow indicating the pulling direction, and 19 is an arrow indicating the tightening direction.

As mentioned above, the pulling jig J according to the present invention is in surface contact with the glue support P, and therefore the tightening force can be evenly distributed, so it is possible to use a plastic support as the glue support. It has an excellent effect as it does not break and of course does not cause any scratches on the surface of the support.

[Brief explanation of the drawing]

Figures 1 to 7 show a conventional gluing post pull-out jig. Figure 1 is a plan view of the tip of the jig, Figure 2 is an enlarged view of the chain, and Figures 3 to 5. is an explanatory diagram showing the state in which the glue support is pulled out, Fig. 6 is a slope view of the winch for pulling up the jig, Fig. 7 is a plan view of the jig wound around the glue support, and Figs. 8 to 16 are This is a jig for pulling out piles or glue supports according to the present invention, and Fig. 8 is a slope view, Fig. 9 is a back view as seen from the direction of the joint, Fig. 10 is a back view with the jig opened, and Fig. 11. are also front views, Figures 12 to 14
The figure is an explanatory view of attaching the jig to the glue support, FIG. 15 is a plan view of the same, and FIG. 16 is an explanatory view of the tightening force of the jig of the present invention. 11.11'--Half cylindrical body, 12...
...Joint body, 13...Ring body, 14...
...String-like body, 15...Hook.

Claims (5)

[Scope of utility model registration request] (1) The half-split cylindrical bodies are integrated so that they can be opened and closed freely with a joint such as a hinge, the string-like body and the ring-shaped part are fixed to one half-split cylindrical body, and the other half-split cylindrical body is attached to the A jig for pulling out underwater piles, characterized by having a fixed hook for hanging a string-like body. (2) The jig for pulling out underwater piles according to claim 1, which is a registered utility model, characterized in that a non-slip portion for increasing frictional force is formed on the inner wall surface of the half-split cylindrical body. (3) The jig for pulling out underwater piles as set forth in claim 1, which is a registered utility model, characterized in that a spring is provided on the joined body such as a hinge to facilitate the opening movement of each half-tubular body. (4) Utility model registration claim 1, characterized in that the upper and lower parts of each half-tubular body expand outward in a trumpet shape.
A jig for pulling out underwater piles as described in . (5) A jig for pulling out underwater piles according to claim 1, which is characterized in that a chain for a chain block is used for the string-like body.