JP5419726B2 - Ship dolly - Google Patents

Description

  The present invention relates to a marine dolly used when, for example, a boat is moved from the ground to the water.

Conventionally, when launching a small vessel such as an inflatable boat that inflates with air into an air tube, a bracket is attached to a transom plate at the stern of the boat to facilitate movement on land, and a shaft with wheels attached to this bracket A technology is known to prevent the water from becoming resistance by swinging the shaft and moving the wheel upward at the time of launching, and moving on the ground. In order to prevent the appearance from deteriorating, a technique is also known in which a shaft can be held obliquely upward using a hook member or a pin member. (For example, refer to Patent Document 1.)
Also, when the shaft is swung upward, paying attention to the fact that the wheel does not play a special role when navigating on the water, when the wheel is composed of metal wheels and airless tires, etc. There is also known a technique for reducing rolling of the hull by utilizing it as an anchor of the ship. (For example, see Patent Document 2.)

JP 2007-196806 PR JP 2005-212684 PR

By the way, in the case of an inflatable boat with a boat length of less than 3 m, for example, if an engine of 2 horsepower or less is used, a ship license or a ship inspection is unnecessary, so that it has become popular as an easy ship in recent years. Two-horsepower engines often have one direction of propeller rotation, and the engine must be rotated 180 degrees when moving backward. On the other hand, the size of the hull is small, and the deck width and transom width are also small. In the startup state, the engine and wheels interfere with each other and the engine cannot be rotated.
For this reason, it is preferable to employ a technique such as Patent Document 1 that allows the shaft to be inclined at an angle. However, in Patent Document 1, a hook member or a pin member is used to hold the wheel obliquely upward. Therefore, there is a problem that it becomes difficult to operate when the movable part rusts with seawater. In addition, there is also a problem that it is difficult to perform an operation of swinging the shaft from the ship when it is launched into the water.

  Therefore, the present invention makes it possible to hold the shaft diagonally upward so that the engine can be rotated even when a two-horsepower engine is mounted, and at this time, the movable portion is prevented from rusting and becoming difficult to move. At the same time, it is an object to make it possible to operate the shaft more easily from inside the ship.

In order to achieve the above object, the present invention provides a marine dolly in which a base end portion of a shaft having a rotatable wheel attached to a distal end portion thereof is swingably supported by a bracket attached to a transom plate of a hull. There,
At the base end of the shaft, a swing shaft hole through which a swing shaft serving as a swing center is inserted when the shaft is swung, and a guide shaft hole through which a guide shaft for guiding the shaft swing is inserted Provided,
The bracket is provided with a long hole through which the swing shaft is inserted, and a guide for guiding the guide shaft, and the guide has a swing position restricted at an upper, obliquely upper and lower position. At least three stoppers
The bracket is fixed so as to project outward with respect to the transom plate of the hull, and the bracket and the base end portion of the shaft are fixedly inserted through the swing shaft hole and the guide shaft hole of the shaft. The two shafts, the shaft and the guide shaft, are integrated in a swingable manner.

Then, the pivot shaft is rotated in the elongated hole, and the guide shaft is guided by the guide so that the shaft can be smoothly rotated. When the guide shaft reaches the predetermined stopper position, the guide shaft Is fitted to the stopper, the position of the shaft is fixed at that position. The lower stopper is used when traveling on the ground with the wheels facing downward, and the upper and diagonally upper stoppers are used when the boat sails underwater. Used when you do not want to interfere with the wheel when rotating the direction 180 degrees.
Here, if the hole through which the swing shaft is inserted is a circular hole whose center of swing is determined at one point, it is difficult to move the guide shaft to the guide or fit the guide shaft to the stopper of the guide. Therefore, the present invention is a long hole whose center of oscillation is not fixed at one point, and the width and length of the groove are appropriately set according to the shape of the oscillation shaft and guide. Thereby, the shaft can be smoothly swung. Further, the long hole may have a bent shape depending on the guide shape or the position of the stopper.
In addition, since the swinging shaft and guide shaft are inserted in such a long hole or with sufficient space so that the guide can move freely, even if each shaft rusts, it can be swung. Difficult to occur.
The shape of the guide may be a semicircular arc, an elliptical arc, or any other shape, and the guide may be an engraved shape matching the guide shape on the outer peripheral edge of the bracket. It is also possible to engrave a guide groove that matches the guide shape in the middle part of the bracket.

Here, in the present invention, the long hole of the bracket through which the swing shaft is inserted may be a straight long hole or a square-shaped long hole whose middle part is bent.
And when making a straight elongated hole, make the hole width slightly thicker so that there is a margin between it and the rocking shaft, and when making a elongated hole bent into a square shape, the bent part If the width of the shaft is made larger than that of the other portions, the shaft can be swung smoothly, which is effective.

In the present invention, the guide may be an arcuate guide groove.
By providing such a guide groove, one end side of the guide is not exposed to the outside, and the shape of the guide can be protected.

In the present invention, a handle that can be gripped with a hand when swinging may be attached to the shaft.
By providing such a handle, when the ship is put in water, an operation of swinging the shaft from the inside of the ship such as pulling the shaft upward can be performed more easily.

In the present invention, the guide may be provided with a stopper for restricting the swing position of the shaft at an obliquely lower position in addition to the three locations.
And if the guide shaft is fitted to this stopper, the wheel can be moved on the ground with the position obliquely below.For example, when a part of the lower surface of the hull projects backward, Wheel interference can be avoided.

A long hole and a guide are formed in the bracket, and the shaft is integrated with the guide through the two shafts of the swing shaft and the guide shaft fixed to the shaft having the swing shaft hole and the guide shaft hole. For example, even in the case of a small boat equipped with an engine with a small output of about 2 horsepower, by providing at least three stoppers that can regulate the swing position of the engine at the upper, diagonally upper and lower positions. The orientation can be changed freely. At this time, since the two shafts are inserted into the long holes of the bracket or the guide, even if rust or the like is generated, the operation such as swinging hardly occurs.
At this time, the long hole of the bracket through which the rocking shaft is inserted is a straight long hole or a square-shaped long hole, so that the shaft can be smoothly swung and moved to the fixed position. If the guide is an arc guide groove, the guide shape is protected without being deformed.
Further, by providing a handle on the shaft, the operation of swinging the shaft from the ship can be performed more easily.
In addition, if the guide is provided with a stopper for positioning the swinging position of the shaft diagonally downward in addition to the above three locations, even if a part of the lower surface of the hull is protruding rearward, the hull and the wheel interfere with each other. Can be avoided.

1 is a schematic view of a boat to which a marine dolly according to the present invention is mounted. 1 is an exploded perspective view of a marine dolly. It is explanatory drawing which shows the structural example of a bracket, (a) is explanatory drawing at the time of making a long hole into linear form, (b) is explanatory drawing at the time of making a long hole into a dogleg shape. It is an example of a structure in the case of using the outer periphery part of a bracket as a guide. It is an enlarged view of the base end part of a shaft. It is explanatory drawing of the state which fixed the shaft in three positions. It is explanatory drawing which shows the other structural example of the integrated structure of a shaft and a bracket, (a) is explanatory drawing of the integrated state, (b) is explanatory drawing of a bracket, (c) is explanatory drawing of a shaft base end part. It is. (A) is the structural example figure of the bracket which formed the stopper in diagonally downward, (b) is explanatory drawing at the time of using the outer periphery part of the bracket as a guide, (c) is explanatory drawing at the time of using this stopper. is there.

  The marine dolly according to the present invention is configured to hold the shaft obliquely upward so that the direction of the engine can be rotated 180 degrees for forward and backward movement even when an engine of about 2 horsepower is mounted, for example. At this time, the movable part is prevented from rusty and difficult to move, and the shaft can be operated more easily from inside the ship. A long hole and a guide are formed in the bracket, and the swinging shaft hole and the guide shaft are formed in the bracket. It is characterized by being integrated so as to be swingable through two shafts, a swing shaft fixed to a shaft having a hole and a guide shaft.

In other words, as shown in FIG. 1, an example of a boat to which the marine dolly is mounted includes a transom plate 2 attached to the stern of an inflatable boat hull 1 that is inflated by air supply, and an engine 3 in the center of the transom plate 2. Can be mounted, and a pair of left and right marine dollies 4 are attached to both sides of the engine 3.
Further, as a ship other than the inflatable boat, it can be used for a small ship made of FRP (fiber reinforced plastic), particularly a ship having a length of less than 4 m. The transom plate means a plate for attaching the outboard motor to the rear of the hull, and the marine dolly can be used by being attached to the plate having such a role.

  As shown in FIG. 2, the marine dolly 4 of the present invention is fitted in a U-shaped bracket 6 fixed to the transom plate 2 by screwing or the like, and a U-shaped bracket 6. In addition, the shaft 10 includes a shaft 10 whose base end is supported by the bracket 6 by two shafts of the swing shaft 7 and the guide shaft 8, and a wheel 11 that is rotatably attached to the distal end of the shaft 10. 10 is inserted through a swing hole 7 and a guide shaft hole 9 of the bracket 6 to be described later, a groove-shaped guide 14 and a swing shaft hole 9a and a guide shaft hole 9b of the shaft 10, The shaft 10 is integrated with the bracket 6 so as to be swingable by being fixed by the stoppers 12.

The bracket 6 is formed, for example, by bending a strong metal plate or the like, and has a long hole 13 and a circle on both opposite sides of the U-shape as shown in FIGS. 3 (a) and 3 (b). A guide 14 made of an arc-shaped groove is formed. Then, the long hole 13 may be linearly long vertically as shown in FIG. 3 (a). As shown in FIG. 3 (b), the middle portion is bent in a dogleg shape (FIG. 3 (b)). However, the swing shaft 7 can be inserted therethrough. And when the long hole 13 is linear, the rocking | fluctuation shaft 7 can move freely along the longitudinal direction in the long hole 13, and the guide shaft 8 which penetrates the guide 14 is mentioned later so that it may mention later. The groove width and length are set such that the guide shaft 8 can be dropped into the stoppers a, b, and c. Has been moved to.
The guide 14 formed of an arc-shaped groove formed around the elongated hole 13 can be inserted into the guide shaft 8 and is guided in the guide 14 by the groove. The groove width is such that it can move freely.
Such a groove width may be about 1 to several mm larger than the diameter of the swing shaft or the guide shaft so that the shaft can move freely, and the length is determined by the shape of the guide.

  Further, stoppers a, b, and c that are cut inwardly are formed on the inner side of the guide 14 at the upper portion, the oblique upper portion, and the lower portion, respectively, so that the groove width can be fitted into the guide shaft 8. In this embodiment, the upper stopper b is extended by bending the extending end in a substantially right angle direction so that the guide shaft 8 dropped from above can be slid to prevent it from coming off. Has been.

As another bracket shape, as shown in FIG. 4, the outer peripheral edge of the bracket 6a can be used as a guide. In this case, it can be reduced in size and weight compared to the bracket 6 in FIG. In addition, since the guide is exposed, there is a possibility that the guide may be deformed by hitting it somewhere, such as during transportation, so that it can be used with a separate protective cover.
In the present embodiment, the shape of the guide 14 is a semicircular shape centered around the central portion of the long hole 13, but may be an ellipse or other arc shape. In the case where the elongated hole 13 is formed in a dogleg shape, if the width of the bent portion is slightly larger than the other portions, the shaft can be smoothly swung, and FIG. As shown in (2), if the lower side of the bent portion is curved as the rounded portion r, the swing shaft 7 can be moved more smoothly.

As shown in FIG. 2, the shaft 10 is made of a light metal hollow frame material such as aluminum, and a handle 15 is attached to one end of the side surface of the shaft 10. The handle 15 is used by grasping and swinging the shaft 10 from the inside of the ship. In this embodiment, when the shaft 10 swings downward, the handle 15 protrudes in the direction opposite to the hull 1. Is provided.
The length of such a shaft is appropriately set according to the mounting position on the transom plate, the height of the hull, and the size of the wheel, but with the shaft fixed downward, the upper end of the wheel It is only necessary that the lower end of the wheel be in a position exceeding the upper part of the hull in a state where a gap is provided between the portion and the bottom of the ship and the shaft is fixed upward.
Moreover, in order to make it easy to rock | fluctuate a shaft, as shown to the enlarged view of FIG. 5, it is preferable that a shaft base end part is a rounded shape.
Moreover, the said wheel 11 is made into the hollow tire which is easy to receive buoyancy in water, for example. This makes it easier to move the shaft upward.

  In the present embodiment, when the guide shaft 8 is fitted into the upper stopper a, the bracket 6 is prevented from falling off the stopper a due to vibration of the hull or the like as shown in FIG. Pin insertion holes p and q are provided at corresponding portions of the shaft 10 and the shaft 10 is swung upward to drop the guide shaft 8 into the stopper a, and then a pin (not shown) is inserted into the pin insertion holes p and q. Although it is possible, other drop prevention methods such as providing only the pin insertion hole p on the bracket 6 side to prevent the shaft from swinging may be used. Further, the bracket 6 may be provided with a pin insertion hole (not shown) for fixing the shaft 10 when the guide shaft 8 is dropped into the upper stopper b obliquely, if necessary.

As a method of integrating the bracket and the base end portion of the shaft, as shown in the embodiment of FIG. 2, the shaft base end portion is sandwiched between brackets having a U-shaped cross section, In addition to inserting the guide shaft and fixing it with the retaining prevention tool 12, a plate-like bracket 6b as shown in FIG. 7B is attached to the base end portion of the shaft 10a as shown in FIG. 7C. 7 (a) by inserting the swing shaft 7 and the guide shaft 8 into the swing shaft hole 9a and the guide shaft hole 9b, respectively, and fixing them with any retaining prevention tool. Such an integrated structure can also be obtained.
The retainer 12 is not limited to that shown in FIG.

  When such a marine dolly can be mounted on a transom plate of a hull or the like, the bracket 6 (or 6a, 6b) protrudes outward with respect to the transom plate 2 as shown in FIGS. In this state, it is easily fixed with a bolt or the like.

  In the marine dolly structure as described above, when traveling on the ground, the shaft 10 is swung downward as shown in FIG. 6C based on the integral structure of FIG. If the lower stopper c is fitted, the wheel 11 is in a state of traveling on the ground. In this state, by pushing the hull 1 or the like, the hull 1 travels on the ground, and when it enters the water, if a person enters the ship and lifts by grasping the handle of the shaft 10, the wheel 11 receives buoyancy. Since it is in the state, the shaft 10 can be swung upward easily. After the guide shaft 8 is dropped to the upper stopper a after being swung to almost right above, if necessary, pins (not shown) are inserted into the pin insertion holes p and q and fixed, as shown in FIG. It will be in the state shown to a) and will be in the attitude of navigating on the water.

By the way, when the hull 1 is moved backward, in the case of a small boat equipped with the engine 3 of about 2 horsepower, the engine 3 needs to be rotated 180 degrees around the axis. At the position shown in FIG. 6A, the engine 3 and the wheels 11 interfere with each other and the engine 3 cannot be rotated. Therefore, in such a case, as shown in FIG. 6B, the shaft 10 is inclined obliquely upward to position the wheel 11 obliquely upward. That is, the shaft 10 is rocked obliquely upward, the guide shaft 8 is dropped into the obliquely upward stopper b, and the shaft 10 is fixed by sliding in a right angle direction along the groove. In this state, the engine 3 is changed in direction and started.
In this case, in order to easily rotate the engine 180 degrees and to fix the lower end of the wheel at a position higher than the water line, it is preferable that the shaft is inclined at about 45 degrees with respect to the transom plate.

  By adopting the swinging and fixing mechanism of the shaft 10 as described above, even when the swinging shaft 7 and the guide shaft 8 are rusted due to the influence of seawater, there is little possibility of causing trouble in operation. It can be operated reliably. Moreover, since the structure is simple, it can be produced at a low cost, and the operation is very simple by holding the handle 15 and operating it.

  By the way, the stopper of the bracket 6 shown in FIG. 8A is another embodiment, and in this embodiment, in addition to the above three stoppers a, b and c, a stopper d obliquely below is added. This is an example provided.

The reason for providing the diagonally downward stopper d in this way is because of the hull 1 side, as shown in FIG. 8 (c), the overhang projecting backward toward the lower part of the transom plate 2 below the bracket 6, etc. This is because, when the portion 1t is provided, the shaft 10 is caught by the overhanging portion 1t when the lower stopper c is used. In this case, the vehicle travels on the ground by fitting the guide shaft 8 to a stopper d obliquely below as shown in FIG. In this case, if necessary, a pin insertion hole p ′ for fixing the shaft 10 is provided in a state where the guide shaft 8 is fitted to the diagonally downward stopper d, and the pin is inserted into the pin insertion holes p ′ and q. More stable ground travel is possible. If the insertion pin is removed when entering the water, the shaft 10 can be easily swung in the water.
As described above, the fixing means of the present invention can be applied regardless of the shape or the like of the hull 1 by providing the stopper according to the use conditions.
In the case of this embodiment as well, a structure like the bracket 6a in FIG. 8B in which a guide is formed on the outer peripheral edge can be adopted as the structure of the bracket.

In addition, this invention is not limited to the above embodiments. What has substantially the same configuration as the matters described in the claims of the present invention and exhibits the same operational effects belongs to the technical scope of the present invention.
For example, the material and shape of the bracket 6 and the shaft 10 are examples.

  As a ship dolly for moving a boat on the ground, it can be constructed at a low cost and has a simple configuration, and even if rust is generated by seawater or the like, it does not affect operability. It is expected to be widely used as marine dollies that can be used for both boats equipped with engines and boats with large or small engines.

DESCRIPTION OF SYMBOLS 1 ... Hull, 2 ... Transom board, 3 ... Engine, 4 ... Dolly for ships, 6 (6a, 6b) ... Bracket, 7 ... Swing shaft, 8 ... Guide shaft, 10 (10a) ... Shaft, 11 ... Wheel, 13 ... slot, 14 ... guide, 15 ... handle.

Claims (5)

The base end of the shaft with a rotatable wheel attached to the tip is a marine dolly supported by a bracket attached to the transom plate of the hull,
At the base end of the shaft, a swing shaft hole through which a swing shaft serving as a swing center is inserted when the shaft is swung, and a guide shaft hole through which a guide shaft for guiding the shaft swing is inserted Is provided,
The bracket is provided with a long hole through which the swing shaft is inserted, and a guide for guiding the guide shaft, and the guide restricts the swing position at the upper, diagonally upper and lower positions. There are at least three stoppers for
The bracket is fixed to protrude outward with respect to the transom plate of the hull, and the base end portion of the bracket and the shaft is fixed by inserting the swing shaft hole and the guide shaft hole of the shaft. A marine dolly characterized in that it is swingably integrated through two shafts, a shaft and a guide shaft. 2. The marine dolly according to claim 1, wherein the long hole of the bracket through which the swing shaft is inserted is a straight long hole or a square-shaped long hole whose middle part is bent. The marine dolly according to claim 1 or 2, wherein the guide comprises an arcuate guide groove. The marine dolly according to any one of claims 1 to 3, wherein a handle that can be grasped by a hand when the shaft is swung is attached to the shaft.   The marine dolly according to any one of claims 1 to 4, wherein a stopper is provided inside the guide to restrict the swinging position of the shaft at an obliquely lower position.

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