JP2008120136A - Anchor for small vessel with snag release mechanism - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an inexpensive anchor with a snag release mechanism with a simple structure and high safety and reliability. <P>SOLUTION: This anchor 100 with a snag release mechanism comprises an anchor body 10 having right and left blade-like flakes 13, 13, a shank support arm 31 journalled to the anchor body 10 rotatable within a constant range, a shank 30 whose tip is longer than the shank support arm 31, whose base end is journalled coaxially with the support arm 31, whose rotary range is larger than that of the shank support arm 31, and which is constituted rotatable to a standing direction to about 90 degrees or more relative to a horizontal position of the flake 13, and a broken pin 40 connecting a tip end of the shank support arm 31 and an intermediate part of the shank 30, and constituted to be broken by a load generated by a standing action of the shank 30 due to separation of the shank support arm 31. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  TECHNICAL FIELD The present invention relates to an anchor for a small vessel, and more particularly, to an anchor having a root release mechanism that can easily lift the anchor even when it is rooted on a reef during lifting. .

  Conventionally, anchoring using anchors has been widely performed when anchoring a ship at sea. Anchoring means mooring a ship by dropping anchors into the sea and submerging deeply into the seabed or hanging on rocks.

  Anchors come in various shapes depending on the seafloor environment such as sand, mud, reef, etc., and the size of the ship to be used. However, when used for small ships such as pleasure boats, Many called anchors are used.

  The conventional Danforth anchor is located between two support substrates, two support substrates disposed at intervals, a posture regulating rod disposed so as to penetrate the two support substrates, and the two support substrates. It is composed of a shank pivotally supported by a posture regulating rod and wing-shaped left and right flakes projecting horizontally on the outer surfaces of the two support substrates. In addition, a connecting chain for connecting to the anchor rope extending from the ship is attached to the tip of the shank, and the flakes stabilize when the anchor settles on the seabed. A dive guide plate that can dive is installed.

  In such an anchor, the shank is freely rotatable in a range until it abuts on the submergence guide plate, and the rotation range is about 30 degrees with respect to the horizontal plane of the flakes.

  The Danforth anchor with such a structure has a structure that obtains a fixing force to anchor the ship by flakes submerging in the sea floor, so it is very effective when the sea floor is sand or mud. Although it functions, in the case of reefs, the flakes may dig deeply into the cracks of the rock, and may not be able to be lifted easily during dredging (hereinafter this state is referred to as “rooting”) ).

  When such rooting occurs, the rotational range of the shank of the conventional Danforth anchor is regulated to about 30 degrees, so that the lifting stress from the ship is caused by the lifting point from the base point near the support shaft through the shank. Acts in the upward lifting direction. For this reason, rocks and the like existing above the flakes become obstacles, making it difficult to lift. Therefore, it takes a lot of time and labor to lift, and if it is impossible to lift, the anchor rope must be cut from the ship and the anchor and the connecting chain must be left on the seabed. This is not only an economic problem but also affects the natural environment, and this problem is not limited to Danforth type anchors, but is the same problem for other types of anchors.

  In order to solve this problem, various inventions are currently being made. For example, an anchor according to the invention described in [Patent Document 1] includes a rooting release device at the tip of a chain extending from a hull, and the device is hit by a weight that is dropped from the hull into the sea through the chain. A hook to be opened is provided, the hook and the tip of the shank are connected by a normal chain, and the proximal end side of the shank and the root release device are connected by a root auxiliary chain.

  According to this anchor, when using a normal anchor, the anchor is anchored by a chain for normal use, while at the time of rooting, the hook is opened by dropping the weight from the ship and colliding with the root release device. The time rope is released. As a result, the anchor is lifted from the proximal end side of the shank by the auxiliary chain for rooting, so that the rooting can be eliminated.

In addition, in the anchors described in [Patent Document 2] to [Patent Document 3], the shank has a rotation range exceeding 90 degrees with respect to the horizontal plane direction of the flake, and is in the vicinity of the pivot shaft of the shank. It has a free rotation range of about 30 degrees regulated by the arranged breaking pin, and the breaking pin is broken when a turning force exceeding the limit support force is applied to the shank. ing. Therefore, when the anchor is used, when the normal anchor is used, the pivot range of the shank is regulated by the breaking pin, so that the anchoring force for anchoring can be demonstrated. By rupturing the breaking pin, the rotation range extends to 90 degrees or more, and the root can be eliminated. In the anchor described in [Patent Document 2], the breaking pin is disposed so as to cross between the two support substrates. In the anchor described in [Patent Document 3], the shank is The both ends of the breaking pin are fixed by two disk-shaped members formed on the pivot shaft.
JP-A-63-315395 JP-A-11-263285 Japanese Patent No. 3362214

  However, the anchor according to the invention described in [Patent Document 1] is relatively expensive because the structure of the root release device is complicated and an auxiliary chain for rooting is required. There is a problem that it is difficult to handle.

  Further, in the anchors according to the inventions described in [Patent Document 2] to [Patent Document 3], since the breaking pin is disposed in the vicinity of the pivot shaft of the shank, the moment force is applied to the breaking pin. As a result, a force several times as large as the lifting stress is applied, so that the rupture pin breaks at the time of normal pull-up other than the time of urgent rooting. That is, because the difference between the lifting stress and the force actually applied to the breaking pin is large, the anchor is very difficult to adjust the lifting stress, and it is not rooted when the ship is affected by wind or waves etc. Nevertheless, there is a risk that the rupture pin may break, and there is a problem in safety. With regard to this point, this problem can be solved by using a rupture pin with a thick cross section, but when such a rupture pin is used, even if a lifting stress is applied, the root release mechanism operates without breaking. If not, it can happen.

  The present invention has been created in view of such problems, and an object thereof is to provide an anchor having a simple and easy-to-handle structure, inexpensive, safe and reliable root release mechanism. It is.

  In order to achieve the above-mentioned object, the present invention has two support substrates that are gradually narrowed forward, and are erected in parallel in the left-right direction at regular intervals, and the upper edges of the wide bases of the two support substrates and Upper and lower dive guide plates each covering the lower edges, a posture regulating rod penetrating and fixing near the base of the two support substrates, and wing-shaped left and right flakes projecting horizontally on the outer surfaces of the two support substrates And a shank support arm pivotally supported as much as possible within a certain range at the base of the two support substrates, a tip longer than the shank support arm, and a base end pivoted coaxially with the arm. The pivot range is larger than that of the support arm, and the shank is configured to be able to rotate in an upright direction of approximately 90 degrees or more with respect to the horizontal position of the flake, and the tip portion of the shank support arm is connected to the middle portion of the shank. And shank branch In the configuration to become more roots Gakari release mechanism anchored and fracture pins in order to break the load caused by separating the standing operation of the shank due from the arm.

  According to the present invention, when the normal anchor is used, the shank and the shank support arm are integrated by the breaking pin, so that the turning range of the shank is restricted to the range in which the shank support arm can turn. Thus, the anchor fixing force sufficient to anchor the ship can be exhibited. On the other hand, when rooting occurs, a force exceeding the limit is applied to the breaking pin and the breaking pin breaks, and the shank is separated and independent from the shank support arm, the restriction of the rotation range is released, and the flake It will rotate to the standing direction of about 90 degrees or more with respect to the horizontal position. If the anchor is pulled from the ship through the shank at such a shank position, the lifting stress acts as a force in the direction of retracting the anchor, so that the anchor is lifted in the root release direction even if it is rooted. Can be jealous.

  Further, according to the present invention, since the breaking pin is disposed in the vicinity of the tip of the shank, compared with the case where the breaking pin is disposed in the vicinity of the pivot shaft, the force for lifting the anchor from the ship is The difference from the shear force acting on the breaking pin is reduced. Furthermore, since the shearing force does not act on the breaking pin unless the shank is lifted upward, the shearing force hardly acts on the breaking pin when using a normal anchor. Therefore, it is possible to avoid a situation in which the break pin is broken carelessly, and anchoring can be performed safely.

  In addition, since the shearing force acting on the breaking pin is small as described above, a member having a thin cross section such as a wire can be used as the breaking pin. By using such a member having a thin cross section, the breaking pin can be used. Can be easily attached and replaced. Furthermore, it is possible to adjust the lifting force by changing the size of the breaking pin.

  Further, according to the present invention, since a complicated device and an auxiliary chain are not required, an anchor with a root release mechanism can be provided that is easy to handle, inexpensive, and that reliably operates the root release mechanism.

  An embodiment of the present invention will be described below with reference to the drawings.

  1 to 4 show an outline of an anchor with a root release mechanism (hereinafter simply referred to as “anchor”) as one embodiment of the present invention. FIG. 1 is a perspective view of the anchor. FIG. 2 is an exploded perspective view of the anchor. FIG. 3 is a plan view of the anchor. FIG. 4 is a sectional view of the anchor.

  In the following, the right direction in FIG. 3 is the front, the left direction is the rear, and the vertical direction is the left-right direction.

  As shown in FIGS. 1 and 2, the anchor 100 of the present invention includes an anchor body 10 that is a portion submerged in the seabed and a posture regulating rod 20 that is disposed so as to penetrate the base portion of the body 10 in the left-right direction. A shank 30 coaxially supported by the anchor body 10 by the same attitude regulating rod 20, a shank support arm 31 disposed so as to sandwich the shank 30, a shank 30 and the shank support arm 31, And a breaking pin 40 configured to be broken by a lifting stress during lifting.

  The anchor body 10 is erected in parallel in the left-right direction at regular intervals, and has two substantially triangular support substrates 11 and 11 that are gradually narrowed toward the front, and the width of each support substrate 11 and 11 is wide. From upper and lower subsidence guide plates 12 and 12 respectively covering the upper end edges and lower end edges of the base, and airfoil left and right flakes 13 and 13 projecting horizontally on the outer surfaces of the two support substrates 11 and 11. Thus, when the anchor body 10 is landed on the seabed, the left and right flakes 13 and 13 are deeply submerged in the seabed to obtain a fixing force for anchoring the ship.

  The anchor body 10 further has a reinforcing plate 14 for maintaining the strength of the anchor body 10 at the rear end portions of the two support substrates 11 and 11.

  The upper and lower subsidence guide plates 12 and 12 are provided with substantially U-shaped members in a plan view at regular intervals, and the guide plates 12 and 12 have substantially U-shaped central grooves 15 and 15 respectively. The width of the shank 30 is wider than the width of the shank support arm 31 and narrower than the width of the shank support arm 31 in the same direction. At the same time, the tip of the left and right flakes 13 and 13 is provided so as to be stably submerged on the seabed when the anchor 100 reaches the bottom.

  In addition, on each inner surface side of the upper and lower dive guide plates 12 and 12, along the left and right edges of the central grooves 15 and 15, a substantially triangular angle so as to contact the inner surfaces of the two support substrates 11 and 11. The restriction members 16, 16, 16, and 16 are welded, and the angle restriction member 16 restricts the rotation range of the shank support arm 31 that rotates around a posture restriction rod 20 described later.

  As described above, the distance between the left and right angles of the angle restricting members 16, 16 is wider than the width of the left and right of the shank 30 in the same direction as the width of the groove 15 formed in the submerged guide plate 12. The width is narrower, and only the shank 30 can pass through the groove 15 while restricting the rotation of the shank support arm 31 by the passage width in the groove 15.

  In the anchor main body 10 configured as described above, a posture regulating rod 20 is disposed so as to penetrate through the base portions of the two substantially triangular support substrates 11 and 11.

  That is, common through holes 38, 38, 38 are formed in the base end portions of the shank 30 and the shank support arm 31 and the wide base portions of the two support substrates 11, 11 of the anchor main body 10. The posture regulating rod 20 is inserted and fixed in the holes 38, 38, 38, and therefore the anchor body 10, the shank 30 and the shank support arm 31 are configured to be pivotally supported on the same axis.

  The posture regulating rod 20 is a cylindrical member extending in the left-right direction, and both ends of the posture-regulating rod 20 have a shape that protrudes greatly from the anchor main body 10 to the left and right in order to stabilize the posture when the anchor 100 lands on the seabed. . In the figure, 21 is a locking plate welded to the rod 20 to abut on the outer surface of one support substrate 11, and 22 is detachable to the rod 20 to abut on the outer surface of the other support substrate 11. Reference numeral 23 denotes a fixing pin, and reference numeral 23 denotes a fixing pin hole.

  The shank 30 is a member having a function as a lifting shaft at the time of lifting, and is a strip-like plate body extending in the front-rear direction in FIG. Further, the shank 30 gradually decreases in width toward the tip, and a shank ring 34 is connected to the tip, and the shank ring 34 is connected to a connecting chain 50 extending from the hull.

  The shank 30 is inserted into the groove 36 of the shank support arm 31 composed of two arm pieces 37, 37 having a fixed groove 36 formed therebetween, and is configured to be detachable from the groove 36.

  The shank support arm 31 is a member for restricting the rotational range of the shank, and its base portion is formed in a substantially U-shape to integrally connect the two arm pieces 37 and 37. Moreover, the length of the support arm 31 in the major axis direction is configured to be shorter than the shank 30.

  Further, a common pin hole 32, 32 penetrating in the left-right direction is formed in the vicinity of the front end of the shank support arm 31 corresponding to the position approximately 1/3 from the front end of the shank 30. The pin holes 32 and 32 are inserted with breakage pins 40 for integrally connecting the middle part of the shank 30 and the tip of the shank support arm 31, and a certain level of lifting stress is applied when rooted. In this case, the shank 30 is separated from the shank support arm 31 and rotated independently.

  Thus, since the breaking pin 40 is disposed in the vicinity of the distal end portion of the shank 30, the force for pulling the anchor from the ship and the breaking are compared with the case where the breaking pin is disposed in the vicinity of the pivot shaft. The difference from the shear force acting on the pin is reduced. Furthermore, since the shearing force does not act on the breaking pin 40 unless the shank 30 is lifted upward, the shearing force hardly acts on the breaking pin 40 when a normal anchor is used. Therefore, it is possible to avoid the situation where the breaking pin 40 breaks carelessly, and anchoring can be performed safely.

  Further, as described above, since the shearing force acting on the breaking pin 40 is small, a member having a thin cross section such as a wire can be used as the breaking pin 40. The breaker pin 40 can be easily attached or replaced. Furthermore, the lifting force can be adjusted by changing the size of the breaking pin 40.

  In the present embodiment, the breaking pin 40 uses a wire, and both ends thereof are fixed portions disposed in the vicinity of the pin hole 32 of the shank support arm 31 while being inserted into the pin holes 32 and 32. It is fixed to the shank support arm 31 by wrapping around 35, 35, has sufficient strength to withstand the fixing force for anchoring the ship, and breaks when a certain level of lifting stress is applied. It is a member having a material with sufficient strength.

  Since the shank support arm 31 is rotated about 30 degrees with respect to the horizontal direction of the flake 13 as described above, the rotation range is regulated by contacting the angle regulating members 16, 16. When the shank support arm 31 is integrated with the breaking pin 40, the rotation range of the shank 30 is restricted to the same rotation range as the shank support arm 31.

  When the anchor 100 is rooted, the shank 30 is separated and independent from the shank support arm 31 by applying a lifting stress of a certain level or more from the ship to break the breaking pin 40, and the angle regulating member. It becomes possible to rotate without restricting the rotation range to 16. The shank 30 that is separated and independent from the shank support arm 31 can rotate up to 110 degrees with respect to the horizontal position of the flake 13 through the groove 15 formed in the upper and lower submersible guide plate 12. Accordingly, the lifting stress applied to the shank 30 acts in the direction in which the anchor 100 is retracted, and thus the rooting can be easily eliminated.

  This embodiment is configured as described above, and the operation thereof will be described below together with the usage method with reference to FIG.

  5A and 5B are schematic views showing a series of operations until the anchor 100 according to the present embodiment eliminates the root, wherein FIG. 5A is a state before the breaking pin 40 is broken, and FIG. The state after breaking the pin 40 is shown.

  In the anchor 100 according to the present embodiment, when the normal anchor is used, the shank 30 and the shank support arm 31 are integrated by the breaking pin 40, so that the rotation range of the shank 30 is the shank support arm 31. Therefore, the anchor 100 can exert a sufficient fixing force to anchor the ship A because the state is restricted to about 30 degrees with respect to the horizontal direction of the flake 13 which is the same range as the rotation range. it can.

  On the other hand, when the left and right flakes 13 and 13 bite into the cracks of the reef X and the anchor 100 cannot be lifted by a normal lifting operation, the ship A is moved directly above the anchor 100, Pull the shank 30 upward. At this time, if a lifting stress of a certain level or more is applied to the breaking pin 40 via the shank 30, the breaking pin 40 is broken. As a result, the shank 30 is separated and independent from the shank support arm 31 and passes through the groove 15 formed in the submergence guide plate 12 as shown in FIG. It is possible to rotate up to about 110 degrees. Therefore, the lifting stress applied to the shank 30 acts as a force in the direction in which the anchor 100 is retracted as it is, so that the left and right flakes 13 and 13 can be easily pulled out from the reef.

  The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the specific embodiments, and various modifications can be made within the scope of the gist of the present invention described in the claims. Deformation / change is possible.

  For example, the anchor 100 according to the present invention does not necessarily have to be a Danforth type, and any anchor other than the Danforth type can be used as long as the shank is pivotally supported or fixed at a predetermined angle to the anchor body. Is also possible. For example, it can be applied to anchors such as a navy type, an eels type, and a hallus type.

  The angle restricting member 16 does not need to be a triangular member as in the present embodiment, and may have other configurations as long as the rotation range of the shank support arm 31 can be restricted. For example, the shank support arm 31 is brought into contact with the bolt protruding into the anchor body 10 by penetrating the support substrates 11 and 11, and the rotation range of the support arm 31 is restricted. Good. By adopting such a configuration, it is possible to save labor at the time of manufacturing and to suppress manufacturing costs.

  The shank 30 does not need to have a shape in which the width slightly decreases toward the distal end, and the width may be uniform from the proximal end portion to the distal end portion.

  In addition to the wire used in the present embodiment, the breaking pin 40 may be a split pin, a copper wire, a brass wire, or the like. In particular, when a split pin is used, the fixing portions 35 and 35 disposed on the shank support arm 31 are not necessary, and the cost is reduced.

  The shank support arm 31 does not have to be a single member in which the two arm pieces 37, 37 are coupled in a substantially U-shape as in the present embodiment, but may simply be two arm pieces.

  The effects described in the embodiments of the present invention are only the most preferable effects resulting from the present invention, and the effects of the present invention are limited to those described in the embodiments of the present invention. is not.

It is a perspective view of an anchor with a root release mechanism as one embodiment of the present invention. It is a disassembled perspective view of the anchor with a root release mechanism as one embodiment of the present invention. It is a top view of an anchor with a root release mechanism as one embodiment of the present invention. It is sectional drawing of the anchor with a root release apparatus as one Embodiment of this invention. BRIEF DESCRIPTION OF THE DRAWINGS It is the schematic showing the operation | movement until the anchor with a root release mechanism as one Embodiment of this invention cancels | releases root, (a) is a state before breaking a fracture pin, (b) is a fracture pin. The state after breaking is shown.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Support board 12 Submarine guide board 13 Flakes 20 Posture control rod 30 Shank 31 Shank support arm 40 Breaking pin 100 Anchor with rooting release mechanism A Ship X Reef

Claims (1)

Two support substrates that are gradually narrowed forward and erected in parallel in the left-right direction at regular intervals,
An upper and lower subsidence guide plate covering the upper edges and lower edges of the wide bases of the two support substrates, respectively;
A posture regulating rod that penetrates and fixes in the vicinity of the base of the two support substrates;
Wing-shaped left and right flakes projecting horizontally on the outer surfaces of the two support substrates,
A shank support arm pivotally supported as much as possible within a certain range at the base of the two support substrates,
The tip is longer than the shank support arm, and the base end is pivotally supported coaxially with the arm. A shank configured to be rotatable,
An anchor with a root release mechanism comprising a breaking pin configured to connect a tip portion of a shank support arm and a midway portion of the shank and to be broken by a load caused by a rising operation of the shank by separation from the shank support arm.

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