JPS61188291A - Anchor for ship - Google Patents

Abstract

PURPOSE:To improve stability and anchoring force by protruding arm sections from both sides of a pawl section that is mounted on a shank so as to freely oscillate, to form a stabilizer slanting surface, and forming a scraping pawl consisting of a bending section making a right angle in the right and left directions and a backward inclined section at the shank oscillating shaft section of a pawl plate. CONSTITUTION:A pawl section 1 is provided and a pawl plate comprising a crown 2 allows arm sections 3 to be protruded from both-side ends, then stabilizer slanting surfaces 4 are formed. Support side plates 5 connected to the pawl plate hold a hinge pin 7 that axially racks a shank 6 to a crown section from both sides. The side plate of this bearing section 8 vertically protrudes the end of the crown section and forms a tip section 9 so as to make a right angle in the right and left directions and be slanted backward, thereby obtaining an auxiliary scratching pawl to the soil, that is, a scratching plate. The inclination of an anchor body is always corrected horizontally by this auxiliary scratching pawl and the anchor body with anchoring force and stability can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a relatively lightweight vessel for use in ships.
This relates to the improvement of anchors for the purpose of high anchoring force and stability.

Conventionally, anchors have been used on ships to grip the seabed as a means of holding the ship in its position while the ship is sailing and when it is not anchored to a quay, and the development of an anchor that more effectively holds this. Under these conditions, emphasis was placed on the need to constantly pierce the seabed soil with the claws, stand perpendicular to the stomach, and behave to maintain the most effective posture.

The horizontal support mechanism using the anchor stock, which led to the current stockless type in which the anchor is housed directly in the bell mouth, is a technology that has been practiced since ancient times. has continued to have problems with its stability.

In recent years, models have been developed in which a stabilizer integrated into the complex instead of the stock is installed on the outer edge of the soil where the claws apply the force, increasing the stabilizing effect, such as the AC14 type and the stockless model. In particular, the stabilizer is tilted backwards and extended to the outside of the nail.

Further, Patent No. 1127762, a stockless type two-clawed anchor for ships, has slopes on the top and bottom, and the core and anchor body are assembled in a delta shape to improve functionality. One side of the stabilizer on the deep side receives a strong pressing force from the opposite side, which is on the shallow side and naturally has lower soil pressure, and the side slope tilting backwards creates an acting force that constantly pushes the crown toward the shallow side, resulting in the pot body It has a structure that corrects the inclination in the horizontal direction, and further moves the toe toward the shank side,
The moment that causes the frame to rotate laterally is also reduced, and thus, along with the effect of the stabilizer slope, the anchor position is maintained horizontally. In addition, in the 9-piece configuration, when the posture is horizontal on the lower slope of the stabilizer, there is no elevation angle in front of the vertical axis, and the pot body is measured horizontally without creating lift in the -F direction at the core, which improves the stopping force and stability. Obtaining favorable performance.

The present invention aims to develop a relatively low-volume anchor by improving this basic technology.
FIG. 2 shows an overall perspective view of this marine anchor.

As shown in the diagram, the flat nail plate that is extended integrally with the crown 2 and constitutes the crown 2 has an overhanging elbow part 6 at its end, and a vertically symmetrical plate is folded into this. Bend and install.

A stabilizer 4 is configured. The support side plate 5 connected to the claw plate holds a sink pin 7, which supports the shank 6 on the crown part, from both sides, and this bearing part 8 presses the side plate inward to create a gap, so that rotation of the shaft is not hindered. . Furthermore, this side plate is made so that the end of the crown part protrudes vertically, and the tip part 9 is made to be perpendicular to the left and right, and tilted backward with respect to the front of the vertical axis.

This is configured as a scratch plate, that is, an auxiliary scratching claw for the soil. For the crown part, a block 10 is placed in the center of both side plates, and bolts 11 are inserted through this from both sides.
It is tightened and fixed with a nut 12.

At this time, the tail ring 13 is assembled at the end, the anchor ring 14 is attached to the tip of the shank, and the whole is assembled.

In the anchor described here, the frame is composed of a single plate that also serves as a claw plate, and a small plate folded in two is attached to the extended end, which is used as a stabilizer to obtain stability. The ridgeline of the side slope and the angle R closely affect the loquat holding force. Experimentally, if the angle is too small, excessive penetration into the pot body is allowed, and although it is deeply immersed in the soil layer, no effect can be expected and loquat The parking force is low, and if the angle is too large, a lift force will be generated on the bottom surface of the stabilizer, which will offset the scraping force and at the same time make it difficult to enter due to the resistance of the enlarged ridge surface. At this angle, the anchor can be raised without any problem, and a structure that satisfies the parking power and stability of the anchor can be obtained.

FIG. 2 explains the relationship between the angle of the stabilizer ridge line, the claw and the shank in the anchor of the present invention, and shows this from the side in a behavioral attitude on the seabed.

The shank 1 is parallel to the seabed surface due to the tensile force in the direction of the arrow, the claw opens according to this rotation angle O, and has an approach angle to the soil, and at this time, the lower slope of the stabilizer is directed to be parallel to the shank. It constitutes a rearward relief angle P with respect to line A-A and does not generate lift. The gist of this structure is introduced in Patent No. 1127762, which can be cited in the main text, but 1
This structure also has the same function, and we aim to achieve this even more simply.The most common ship anchor is made of cast steel, but here we have made it lighter by taking advantage of the advantage of using a steel plate. , realizing the practical use of stockless anchors for small and medium-sized vessels.

FIG. 6 also shows the behavior of the scratch plate of the anchor of the present invention on the seabed, and shows that when the pot body 2 is placed on the bottom of the upper layer 1 of the stratum in a horizontal position, Before the tensile force is applied, the plate 4 bites into the soil due to the anchor's own weight, and at the same time as the pulling force acts, the toes are moved downward in the direction of the arrow to compensate for the position of entering the bed layer.

Figure 4, which prevents the claw from slipping on the upper soil layer, shows that the claw enters the soil layer and assumes a behavioral posture. The extension line is configured to be parallel to this vertical axis direction at the upper limit rotation angle O of the shank, reducing the influence on other parts at the core.Furthermore, this lower side is on the scraping side when pulling up the anchor. Face the soil with the back side 1 and resist the shank being pulled in the direction of the arrow.

Together with the back surface of the stabilizer plate, it serves as the starting point for this effective lifting action, making it easier to pull up.

Thus, for large anchors for ships, emphasis is placed on functional performance due to the shape of the pot body, as well as on weight and strength considerations, whereas with lightweight small anchors, it is possible to insert them directly by hand, without relying on mechanical force such as a windlass. For lifting anchor, 1. Functional improvements are desired, and holding power and stability are required while maintaining strength within the required range.

Here we provide a marine anchor that can satisfy these requirements.

[Brief explanation of the drawing]

FIG. 1 is a perspective explanatory view of two ship anchors of the present invention. Figure 2 shows the engagement of the stabilizer with the claw and shank of the anchor. FIG. 6 also explains the seabed behavior of the anchor and illustrates the effect of the scratch plate along with the tooth 4 diagram.

Claims (1)

[Claims] Branched from the crown, plate-shaped claws are provided on the left and right sides, the tips of the claws are brought to the side of the shank that rests on the axis in the center, the whole is assembled in a delta shape, the claw plates are extended to the crown, and the claws are tilted backwards at both ends. The elbow part is extended, and a plate is provided on the part that is bent to form a stabilizer slope on the top and bottom, and the end of the support side plate that is integrated with the nail plate and supports the shank from both sides is extended vertically, and both of these protruding parts are A marine anchor that is installed at right angles to the left and right and tilted backwards in the vertical direction, and has a scratching claw.