JPH01127482A - Boat anchor - Google Patents

Abstract

PURPOSE:To make it possible to rapidly rake an anchor by using a double hinge which can be moved in longitudinal and lateral directions so that the anchor may behavior in any attitude. CONSTITUTION:A shank 3 is connected to a saddle 2 and is also connected to a pawl 3 through the intermediary of the saddle 2, and the center axis of a hinge A is directed in the direction of the forward end of the pawl 3, as indicated by the chain line 4 and bears the shank side longitudinally thereof. A hinge B is born laterally by the pawl 3 side through the intermediary of the saddle as indicated by the chain line 5, and this pawl 3 allows the shank to rake in both vertical and lateral direction with respect to the shank on the sea bottom. The pawl 3 is provided thereto with a fin 7 which may enhance the directivity of the anchor.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the development of a relatively lightweight anchor mainly used for anchoring small watercraft, which does not require a stock that is troublesome and inconvenient to handle; We have improved the structure of the single-claw anchor, which is the simplest, and have a high level of performance by being able to handle a variety of complex seabeds.
We also aimed for ease of storage and handling.

Based on the stock anchors traditionally equipped on sailing ships, anchors have been branched into many types depending on their purpose, such as ship anchoring and port work, but among these, there are also various types for boats. There are a variety of types, and structurally they are roughly divided into forged steel frames and welded steel plates.

Figure 1 shows a conventional basic stock anchor, in which a long stock (2) is attached to the front part of the shank (1), and a fluke (3) is attached to the rear end at a position crisscrossing the stock. Both ends of this will become claws (4).

In this configuration, the stock lies horizontally when operating on the seabed,
One of the claws is scratched downward, and the other side is raised upwards, but one claw is always used in anticipation of biting into either side, so it can be said that it is practically unnecessary.

As time progressed, with the development of power boats, stockless anchors, which were convenient for storage, were used mainly for large and external floating boats.
Most of these have a hinge at the end of the shank, and
The inconvenience of having both flukes and claws branching out on the left and right scraping the ocean floor at the same time and only one claw being effective has been eliminated.

In small ships, there are nine different types of anchors used, ranging from old models to new ones, but if you limit it to boats and yachts, the majority of anchors around the world are of the dunn hose type, which is also a two-thousand-sided anchor. The claw is made of a thin plate, and the shin at the end of the shank penetrates the stock from the side and is configured to support the frame. There are other types of this type, such as the LWT type, but there are also the CQR type shown in Figure 2 and the Bruce type shown in Figure 3, both of which have advantages and disadvantages in terms of performance and handling. We would like to see improvements to fulfill its original purpose as an anchor.

This is because anchors for boats and yachts are as compact and high-performance as possible due to boat capacity issues, are highly responsive at anchorages, are immediately effective at the point of insertion, have a strong anchoring force, and can be easily fixed due to wind deflection. All of the above-mentioned anchors still leave some unsatisfaction with these conditions, such as good response to the swinging and movement of the ship's hull.

-For example, the CQR type and the Bruce type both behave as if digging up the soil with their claws from the side, and in order to obtain sufficient fixing force, they must be towed a considerable distance from the bottom position.
There is also a defect that the claws cannot be scratched unless the length of the mooring cable is paid out with sufficient margin for the depth of the water.

In the present invention, these points have been improved to improve quick response and fixed strength,
We also tried to improve the wind direction and accommodation surface, and achieved great results in terms of performance and handling.

There are two types of small anchors: one is a type where the deck of the boat is narrow and there is no storage space, so it is always stored in a hatch, and the other is a type that has a storage roller and metal fittings on the side, mainly the bow, and is stored in this.The former is called a hatch anchor.

The latter is called a side anchor and is used in conjunction with a winch on relatively large boats.

Figure 4 is an overall perspective view of the anchor of the present invention, showing the shank (1
) is connected to the saddle (2) and, via this, to the pawl (3), and the axis of the hinge A is directed toward the tip of the pawl as shown by the dotted line (4), and the shank side is pivoted from the vertical direction. On the other hand, the hinge B is also supported on a shaft from the lateral direction shown by the dotted line (5) on the claw side through the saddle, and this claw is in a position to scratch the shank from any direction on the seabed, up and down and left and right. made possible.

Furthermore, a protrusion (6) is provided on the saddle portion as a stopper to properly determine the rotation angle of the shank.

When the claw is in the raking position from the back side, it maintains the best angle of entry into the soil.
Supplements the clawing action on the left and right rear of the end of the claw, increasing stability and preventing the anchor from tipping over when it is towed by the mooring line and turning when the boat turns in the direction of the wind. It is equipped with a fin (7) that enhances directivity when changing direction depending on the posture, and has an attachment hole (8) for the tether at the tip of the shank, and an opening for the butt rope (9) at the upper end of the rear part of the claw. ing.

Figure 5 explains the behavior of the anchor of the present invention on the seabed. Generally, when the anchor lands on the bottom, the claw always faces the soil side, and the anchor is set in a raking position so that it can enter. Both the two claws of the traditional stock anchor fixed at both ends and the claws placed on the left and right sides of the stockless anchor, which is rotated by a hinge mechanism, are designed to meet this purpose. be.

However, stock anchors have a long stock that is inconvenient to handle, stockless anchors are heavy even though they can be conveniently stored directly in the bell mouth, and older models have low performance and are not suitable for small ships, so it is easier to handle them. The CQR type and Bruce type described above are examples of this type. Many attempts have been made in this type of model for a long time, but those that are integrated without moving parts are structurally strong and durable, but
In terms of important performance, it seems impossible. Returning to the diagram,
An anchor suspended from the ship.

They do not immediately dig their claws into the upper layer of the bottom sediment, but only begin to behave after being subjected to a tensile force from the ship.

Therefore, ideally, it is necessary to be in the most stable position when landing on the bottom, so that the claws can dig in immediately.

When the anchor shown in Figure A touches the bottom of the ocean floor, the structurally last fin touches the ground first, and the left and right overhangs support the anchor in the lateral direction.Secondly, the anchor's body is supported by the weight of the claws as shown in Figure B. Since the center of gravity is at the front, the hinge B, which is pivoted from the side of the saddle, falls forward, and the whole body is in a horizontal, stable and low position, and the weight of the shank is placed on the claw, causing the tip of the claw to touch the soil. Make it bite. Eventually, the mooring ropes are stretched together by tension, and the connected anchor moves forward while pointing in the direction of the boat as shown in Figure 0, and digs into the soil, creating a fixing force and functioning.

Figure 6 shows a case where the anchor does not fall forward due to severe undulations on the ocean floor or is pushed by a strong current, but instead lies backwards. In this position, the claw rests on the shank, making it extremely unstable. In this state, the claw rotates due to its own weight by the action of hinge A, which pivots the saddle from the vertical direction, and when it turns with the tip of the claw sticking up on either the left or right side, it assumes the position shown in Figure B, which corresponds to The lateral scratching angle of the shank and claw at this position is limited by the protrusion. Furthermore, the anchor is towed 0
In the figure, it turns from the supine position in the direction of the arrow, enters the soil, opens the hinge B, stands upright downwards while maintaining the claw angle, and returns to the normal position using the button.

The present invention has a configuration as explained above, and has a U-lateral direction (
The double hinge that works allows the anchor to behave from any position, and in particular, the claw part of the body quickly returns to the normal raking position due to the action of the tip and fins placed on the left and right. In many movements from the front, the horizontal axis of the hinge responds immediately and has the characteristic of rapidly biting the claw, making it possible to quickly shoot down, and unlike the conventional vertical axis pointing to the tip of the claw or fixed auxiliary claw. If you use a horizontal position to scrape the anchor with your nails, it is impossible to respond from the front horizontal position, which is the most responsive position, and it is not possible to quickly and accurately scrape at the anchor point. This is a function that sets it apart from these.

Incidentally, the claw slope of the anchor, which is configured in an inverted V shape, concentrates the soil acting force on the claw surface and can obtain a strong fixing force, which is already known as Patent No. 1151518, and this case was developed as a related technology. It was done.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a stock anchor. Figure 2 shows CQII
, type, Figure 3 shows the Bruce type. FIG. 4 is a perspective explanatory view of the anchor of the present invention. Figure 5 ABC is an explanatory diagram of seabed behavior Part 1. Figure 6 is also Part 2. Patent applicant Nakamura
Sojibe

Claims (1)

[Claims] The shank is supported by a vertical shaft whose axis is oriented toward the tip of the claw, and rotates from side to side, and the shank is connected to the bottom of this shank from the horizontal direction through a saddle that forms a double hinge that moves vertically and horizontally. An anchor for boats that features raking behavior from any direction.