JP2002225794A - Towed-type small-sized ship - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a towed-type small-sized ship made of novel structure, capable of decreasing a cost by downsizing a trailer body, eliminating the need for work requiring time and skill, and preventing the hull from being damaged at the time of ascending/descending. SOLUTION: This towed-type small-sized ship carried on land by a towing vehicle comprises wheels 15 disposed at the ship exterior on right and left side walls of the hull 2, and a wheel supporting mechanism 16 supporting the wheels 15 so as to ascend/descend between a carrying position A in which the wheels 15 are contacted on a road surface and a running position B in which the wheels 15 are retracted in the upper part of the hull.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a towed small boat carried on land by a towed vehicle such as an automobile.

[0002]

2. Description of the Related Art In general, when a small ship is transported by land, a special truck called a trailer is used. This trailer has a structure in which wheels are provided on a steel frame trailer body having a size capable of mounting a hull, and a hitch member connected to a towing vehicle is provided at a front end of the trailer body. .

[0003] In order to lower the hull mounted on the trailer into the water, the trailer enters the water together with the trailer, and when the hull rises to the surface of the water, the trailer is lifted to land. To unload the hull, the hull is mounted on the trailer body and fixed while the trailer enters the water, the hitch member is connected to the towing vehicle, and the trailer is lifted by the towing vehicle.

[0004]

However, the conventional method of transporting a hull requires a trailer having a length that is substantially the same as the entire length of the hull, resulting in an increase in the size of the trailer and an increase in cost. is there.

The work of loading the hull on a trailer underwater or fixing it with ropes is time-consuming and requires a lot of experience, and it is easy to damage the hull during lifting and lowering work and during transportation. There's a problem.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional circumstances, and it is possible to reduce the cost by reducing the size of a trailer or to eliminate the need for loading work requiring labor and experience. It is an object of the present invention to provide a towed small boat having a novel structure that can prevent the hull from being damaged during transportation and transportation.

[0007]

According to a first aspect of the present invention, there is provided a wheel disposed on the outer side of the left and right side walls of a hull, a transport position where the wheels are in contact with a road surface, and a running position where the wheels are stored in an upper part of the hull. And a wheel supporting mechanism that supports the device so that it can move up and down.

According to a second aspect of the present invention, in the first aspect, the wheel supporting mechanism rotatably supports the wheels and is supported by the hull so as to be vertically swingable. A shock absorber installed between a moving arm and the hull, and an elevating mechanism for elevating the swinging arm together with the shock absorber to one of the transport position and the cruising position. It is characterized by.

According to a third aspect of the present invention, in the first or second aspect, the lifting mechanism is bolted to the shock absorber, screwed to the bolt, and rotatably supported by the hull. It is characterized by comprising a nut member and an operation handle for moving the swing arm up and down via the bolt member by rotating the nut member.

According to a fourth aspect of the present invention, in any one of the first to third aspects, the hull is provided with a wheel cover that covers at least an upper portion of an outer peripheral surface of the wheel at the cruising position. Features.

[0011]

In order to land the towed small boat of the present invention from the surface of the water, the hull is moved to the shallow water and the wheels are lowered to the transport position. In this state, the hull is connected to the towing vehicle, and the towing vehicle lifts the hull ashore. Further, in order to launch from the land to the water, the hull is made to enter the water by the towing vehicle, and the wheels are stored when the hull rises, and the connection with the vehicle is released.

According to the towing type small boat according to the first aspect of the present invention, the wheels disposed on the left and right side walls of the hull are movably supported between the transport position and the cruising position. Is lowered to the transport position, whereby the rear portion of the hull can be supported by the wheels so as to be towed. Thus, the hull can be transported by connecting the front portion thereof to the vehicle. As a result, a conventional trailer having a length extending over the entire length of the hull can be eliminated, and costs can be reduced.

[0013] Further, a simple operation of lowering the wheels to the transport position is sufficient, so that it is not necessary to load and fix a conventional hull on a trailer, and it is not necessary to perform a work requiring experience, and the hull is not damaged. It can be prevented from sticking.

[0014] In addition, since the wheels are stored in the upper part of the hull when cruising, there is no hindrance to cruising, and in the event of flooding, the hull of the tires can be made less likely to sink due to the buoyancy of the tires. Becomes

According to the second aspect of the present invention, the rocking arm on which the wheels are supported is pivotally supported on the hull, a shock absorber is erected between the rocking arm and the hull, and the rocking arm is moved by a lifting mechanism. Is moved to any one of the above-mentioned transport position and the cruising position, so that the shock absorber can suppress vibration of the hull due to unevenness of the road surface during transportation. In addition, the wheels can be raised and lowered by a simple operation of the lifting mechanism.

According to the third aspect of the present invention, a nut member is screwed onto a bolt member connected to the shock absorber, the nut member is rotatably supported on the hull, and the nut member is rotated by an operation handle. Since the swing arm is moved up and down, the wheels can be moved up and down by a simple operation simply by rotating the operation handle.

According to the fourth aspect of the present invention, since the hull is provided with the wheel cover that covers at least the upper portion of the outer peripheral surface of the wheel, it is possible to prevent an occupant from touching the wheel, and to provide a boat with a novel design. Can be provided.

[0018]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a portable telephone according to an embodiment of the present invention.

1 to 10 are views for explaining a towed small boat according to an embodiment of the present invention. FIGS. 1 and 2 are side and plan views of the towed small boat, and FIG. FIG. 4 is a cross-sectional view of a swing arm portion of the wheel support mechanism (a cross-sectional view taken along line IV-IV in FIG. 3), and FIG. 5 is a cross-sectional view of a wheel portion of the wheel support mechanism. Figure (Fig. 3
6 and 7 are plan views of the side brake mechanism, FIGS. 8 and 9 are plan views showing a state in which the hitch members are housed in the hull, and FIG. 10 is a side view and a view showing the connected state of the hitch members. FIG. 11 and FIG. 12 are diagrams showing a procedure for taking in and out a hitch member.

In the figure, 1 is a tow-type small boat,
The hull 2 is formed by connecting a deck 4 to a bathtub-shaped hull 3 in a watertight manner. The deck 4 is composed of a cabin 4a recessed from the upper edge 3a of the hull 3 in a stepped manner, and a side deck 4b raised from the side edge of the cabin 4a and joined to the upper edge 3a. I have. At the center of the hull of the cabin 4a, a steering table 5 having a steering handle 5a, a forward / reverse switching lever 5b, and the like is erected, and occupant seats 6, 7 are provided at a front end and a rear end, respectively.
Are arranged. Reference numeral 8 denotes a hatch for opening and closing a storage box (not shown) provided at the bottom of the ship.

An outboard motor 10 is provided at the stern 2a of the hull 2. The outboard motor 10 comprises an upper cowl 11 containing an engine unit (not shown) connected to a lower case 13 having a screw 12 mounted thereon, and a swivel bracket 1 fixed to the stern 2a.
4 pivotally supports a swingable left and right and a swingable up and down. The swivel bracket 14 is provided with a tilt-up mechanism (not shown) for rotating and holding the outboard motor 10 above the hull 2 during mooring and transportation.

The hull 2 has a self-propelled device which is a feature of the present embodiment. This self-propelled device is mounted on the hull 2
Left and right side walls 2b, left and right wheels 15, 15 arranged on the outer side of the ship, left and right wheel support mechanisms 16 for supporting the respective wheels 15 so as to be able to move up and down, and a connection arranged on the bow 2c of the hull 2 And a hitch member 17 as a means.

The wheel 15 is formed by mounting a rubber tire 15b on a wheel 15a made of aluminum or the like, and the wheel 15a is rotatably supported by an axle 15c via a bearing. A support boss 20 is formed at the inboard end of the axle 15c.

The wheel support mechanism 16 is provided for supporting the wheels 15 so as to be able to move up and down between a transport position A where the wheels 15 are brought into contact with the ground and a cruise position B which is stored above the hull during cruising. And has the following structure. Since the wheel support mechanism 16 is symmetrical, mainly the right wheel support mechanism will be described.

The rear end of a swing arm 21 extending in the longitudinal direction of the hull is joined to the support boss 20 of the wheel 15.
The swing arm 21 includes a horizontal portion 21a extending substantially horizontally forward of the hull from the support boss 20, and an inclined portion 21b extending obliquely upward from the front end of the horizontal portion 21a. The upper end boss portion of the inclined portion 21b Reference numeral 21c is rotatably supported by a swing shaft 22 fixed to the hull 2.

The horizontal portion 21a of the swing arm 21 is connected to a lower end of a shock absorber 24 extending vertically.
The upper end of the shock absorber 24 is connected to an operation mechanism (elevation mechanism) 25 fixed to the hull 2. Absorber 24
Has a structure in which a piston rod 24b is inserted into a cylinder 24a filled with hydraulic oil so as to be able to advance and retreat, and a coil spring 24c is erected between the piston rod 24b and the cylinder 24a.
It absorbs vibration transmitted from the road surface.

The operating mechanism 25 has a nut member 28 rotatably and vertically immovably inserted into a holding member 26 attached and fixed to the upper end of the side deck 4b. 29 is fixed, and the bolt member 27 is screwed into the nut member 28 so as to project downward,
The cylinder 2 of the shock absorber 24 is attached to the lower end of the nut member 27.
4a are connected.

When the operation handle 29 is manually rotated, the nut member 28 rotates to move the bolt member 27 up and down, thereby moving the wheel 15 via the shock absorber 24 and the swing arm 21 to the transport position A or It is raised and lowered to any position of the traveling position B and is held at any of the positions. The operation mechanism is not limited to a manual operation mechanism, and may be configured to be driven up and down by a fluid pressure or a motor.

The wheel support mechanism 16 is provided with a side brake mechanism 100. The side brake mechanism 100 has a structure shown in FIGS. A brake disc 101 is fixed to the wheel 15a of the wheel 15, and a large number of engagement holes 101a are formed in the outer peripheral portion of the brake disc 101 at predetermined intervals in the circumferential direction.

The swing arm 21 has a push rod 1
02 is provided. This push rod 102
Any one of the engagement holes 10 of the brake disc 101 is moved by the rod holder 103 fixed to the swing arm 21.
The wheel 15 is supported so as to be able to advance and retreat between a brake position where the wheel 15 is fixed to the wheel 15 so that it cannot rotate and a brake release position where the brake is released and the wheel 15 is allowed to rotate. The push rod 102 is provided with a spring 104
The brake is always biased to the brake release position. An inverted L-shaped lever 105 is pivotally supported on the swing arm 21 so as to be rotatable. One end of the lever 105 is provided with a bearing 106 which comes into contact with the push rod 102.
Is attached, and a pillow ball joint 1 is attached to the other end.
The rear end of a rod 108 extending in the front-rear direction of the hull is connected to the rear end of the rod 108. A turntable 110 is connected to a front end of the rod 108 via a pillow ball joint 109.

The turntable 110 is rotatably supported by the swing arm 21, and the turntable 110 is provided with a stopper handle 111. The stopper handle 111 is urged to engage with either the brake release concave portion 112 or the brake concave portion 113 formed on the swing arm 21.

When the hull 2 is stopped and parked,
The stopper handle 111 is pulled up to release the engagement with the brake release recess 112, and in this state, the turntable 110 is rotated, and the stopper handle 111 is moved to the brake recess 113.
To be engaged. Then, with the rotation of the turntable 110, the lever 105 is pushed through the rod 108 and the push rod 1.
02 is advanced, and the push rod 102 is engaged with the engagement hole 101a of the brake disc 101. Thus, the wheels 15 are fixed so as not to rotate. To release the side brake, the stopper handle 111 is pulled up and rotated to engage the brake release recess 112. As a result, the push rod 102 retreats and the fixing of the wheel 15 is released.

In this way, the wheel 15 is fixed by moving the push rod 102 forward and backward through the lever 105 and the rod 108 by the turntable 110, so that the wheel 15 can be securely fixed, and the hydraulic mechanism and The structure is simpler than when a wire mechanism or the like is used, and the cost can be reduced.

The traveling position B of the left and right side walls 2b of the hull 2
A concave portion 30 is provided in the portion facing the side. The concave portion 30 avoids the interference caused by the swing of the wheel 15 and the shock absorber 24, and suppresses the protrusion of the wheel 15 to the outside of the boat.

Side covers 31 are provided on the outer surfaces of the left and right side walls 2b. This side cover 31
It has a size and a shape that covers the above-mentioned shock absorber 24 and the inclined portion 21b of the swing arm 21, thereby preventing the appearance from being deteriorated and preventing external force from being applied to the shock absorber 24 and the like.

A wheel cover 35 is mounted on the side deck 4b of the hull 2. The wheel cover 35 is formed in an arc shape in a side view so as to cover the upper half and the inner surface of the outer peripheral surface of the wheel 15 at the traveling position B, and expands upward from the upper surface of the side deck 4b. Is out. In this manner, the occupant is prevented from touching the wheels 15 during cruising.

At the lower part of the wheel cover 35 on the inner side of the ship, a shelf 35a is formed to be bent stepwise (FIG. 5).
reference). Thus, the wheel cover 35 and the shelf 35a can be used as a backrest, a seat, or a table.

The hitch member 17 can be moved in and out between a storage position C stored in the hull 2 and a connection position D pulled out of the hull 2 and connected to a towing vehicle. Has the following structure.

A notch 2d is formed at the tip of the hull 2, and a steel case 40 is inserted and fixed in the notch 2d. This storage case 40 is formed by joining left and right side plates 40b, 40b and a rear plate 40c to a rectangular bottom plate 40a, and is a substantially rectangular parallelepiped box shape opened upward and forward. The left and right side plates 40b extend further forward than the front end of the bottom plate 40a, and a connecting shaft 41 constituting a part of the hitch member 17 is fixed between the left and right extension portions 40b 'in the boat width direction. I have.

At the upper end opening of the storage case 40, a cover plate 4 is provided.
2 is attached by a hinge (not shown) at the rear end so as to be openable and closable, and the cover plate 42 is substantially flush with the deck upper surface 4 'when closed. A U-shaped concave portion 42a is formed by cutting out a front portion of the cover plate 42.

An anchor roller 43 is rotatably mounted on the connecting shaft 41. The anchor roller 43 is used when hoisting anchoring, mooring ropes and the like. The anchor roller 43 is located in the space of the notch 2d formed in the hull 2 so that the work of hoisting a mooring rope or the like can be easily performed.

The hitch member 17 is connected to the connecting shaft 41.
Arm 45 rotatably supported by the arm, a connecting arm 47 rotatably connected to the hanging arm 45 via a connecting shaft 46, and a hitch coupler 48 fixedly connected to the connecting arm 47. Have. The hanging arm 45 is a pair of left and right arm plates 45 arranged in parallel.
a, 45b.

The connecting arm 47 is divided into a front arm 51 connected to the hitch coupler 48 and a rear arm 52 connected to the hanging arm 45.

The front arm 51 and the rear arm 5
2 is a pair of left and right arm plates 5 arranged in parallel with each other.
1a, 51b and 52a, 52b.
6 are connected. A member member 53 is joined between the front ends of the left and right arm plates 51a and 51b of the front arm portion 51, and the hitch coupler 48 is joined to a center portion of the member member 53 in the boat width direction.

The left and right arm plates 5 of the rear arm portion 52
A bracket 55 is bridged and joined between the central portions of the 2a and 52b, and a support cylinder 55a is attached and fixed to the central portion of the bracket 55 in the boat width direction. A leg 56a to which an auxiliary wheel 56 is attached is detachably attached to the support cylinder 55a by inserting a pin 57.

The auxiliary wheels 56 are used when the hull 2 is turned on land or parked. Therefore, in a state where the hitch member 17 is connected to the towing vehicle and towed, the auxiliary wheels 56 are lifted upward from the road surface. Also, the bottom plate 40 of the storage case 40
A storage hole 40d is formed in the center portion of a, and the auxiliary wheel 56 can be stored in the storage case 40 by inserting the leg portion 56a into the storage hole 40d with the auxiliary wheel 56 facing upward.

When the hitch member 17 is pulled out to the position D at the time of connection, the hanging arm 45 is connected to the connection shaft 4.
1 and extends downward from the lower end of the hanging arm 45 so that the connecting arm 47 projects substantially horizontally forward of the hull.

The hanging arm 45 and the connecting arm 47
A pair of left and right fixed plates 60 is detachably mounted between the two. The upper end portion 60a of each fixing plate 60 is fixed by inserting a pin 61 into the hanging arm 45, the front lower end portion 60b formed in a forked shape is on the front side arm portion 51, and the rear lower end portion 60c is on the rear side. It is fixed by inserting pins 62 and 63 into the arm portion 52, respectively.
Thereby, the hanging arm 45 and the front and rear arm portions 51 and 5 are provided.
2 is fixed so as not to rotate. Each of the fixing plates 60 can be stored in the storage case 40.

An eye plate 65 is fixed to the side plate 40b of the storage case 40.
The hanging arm 45 is fixed to 5 by inserting a pin 66. Thereby, the hanging arm 45 is fixed to the storage case 40 so as not to rotate. By fitting the hitch ball 50 connected to the tow vehicle to the hitch coupler 48, the hull 2 is connected to the tow vehicle so as to swing left and right and up and down. The hitch coupler 48 has a lever 4 for locking the connection state with the hitch ball 50.
8a is provided.

On the other hand, when the hitch member 17 is stored in the storage position C, the hanging arm 45 is connected to the connecting shaft 4.
1, the rear arm portion 52 is folded forward from the rear end of the hanging arm 45 inside the hanging arm 45, and the front arm 51 is bent from the front end of the rear arm 52 to the hanging arm 45. It is stored in the storage case 40 in a state of being folded rearward below the bottom 45.

In order to pull out the hitch member 17 stored in the storage case 40 to the position D at the time of connection, first, as shown in FIGS.
0, the auxiliary wheel 56 is taken out, and the hanging arm 45 is raised clockwise (see FIGS. 11A and 11B). This operation is performed on the hull 2 side.

The hanging arm 45 is held in the state shown in FIG. 11 (b).
52 is rotated so as to be linear, and the fixing plate 60 is attached to the hanging arm 45 and the front and rear arm portions 51 and 52 by the pins 6.
1, 62, 63 are inserted and fixed.
Is inserted into the support cylinder 55a, and the pin 57 is inserted and fixed (see FIG. 12C). In this state, the hanging arm 45 is rotated forward until the auxiliary wheel 56 faces downward, and the hanging arm 45 is fixed to the eye plate 65 with the pin 66 (see FIG. 12D). Thus, the hitch member 17 is pulled out to the position D at the time of connection. Thereafter, the hitch coupler 48 is fitted to the hitch ball 50 of the towing vehicle. The work of rotating the hanging arm 45 forward is performed by hanging a rope on the connecting arm 47 or the like on the hull 2 side and gradually rotating the connecting arm 47.

Further, the hitch member 17 is stored in the storage case 4.
In order to store it in 0, the connection with the towing vehicle is released, the pin 66 of the eye plate 65 is pulled out, and the hanging arm 45 is rotated counterclockwise to be pulled up. This lifting operation is performed by hanging a rope on the connecting arm 47 or the like on the hull 2 and pulling it up. With the hanging arm 45 raised, the auxiliary wheel 56 and the fixing plate 60 are removed, and the auxiliary wheel 56 is stored in the storage case 40 first.
Next, the front and rear arm portions 51 and 52 are folded and rotated and stored in the storage case 40 together with the hanging arm 45,
Subsequently, the fixing plate 60 is stored. Thereafter, the cover plate 42 is closed. By storing the auxiliary wheel 56 first, the arms 51, 52, and 45 are immovably pressed.

In the towed small boat 1 of the present embodiment,
In order to unload the hull 2 from the water, the hull 2 is moved to the shallow water, and the operation handle 29 is rotated to turn the left and right wheels 15.
Is lowered to the transport position A, and the hitch member 17 is pulled out of the storage case 40 to the connection position D in accordance with the above-described operation procedure, and the hitch member 17 is fitted to the hitch ball 50 of the towing vehicle and connected. . Thus, the hull 2 is unloaded and transported.

In order to launch the hull 2 from the land to the water, the hull 2 is floated on the water by the towing vehicle, the operation handle 29 is rotated to store the wheels 15 in the cruising position B, and the hitch member Then, the hitch member 17 is folded and stored in the storage case 40 according to the above-described operation procedure.

According to this embodiment, the left and right side walls 2 of the hull 2
b, the wheel 15 is supported by a wheel support mechanism 16 so as to be able to move up and down between a transport position A where the wheel 15 is in contact with the road surface and a cruising position B where the wheel 15 is stored above the hull. The hitch member 17 is connected to the front end portion so as to be able to be taken in and out between the storage position C and the connection position D, so that the wheels 15 are lowered to the transportation position A during transportation and the hitch member 17 is moved to the connection position D. By connecting the hitch member 17 to the towing vehicle, the hull 2 itself runs on its own, eliminating the need for a conventional dedicated trailer. As a result, the user only needs to purchase only the towing type small boat 1, and the purchase cost can be reduced.

When transporting the hull 2, the operation handle 29 is rotated to lower the wheels 15 to the transport position A, and the hitch member 17 is pulled out on the boat, assembled and connected to a towing vehicle. Simple work can be performed, and it is possible to eliminate the troublesome work and experience of raising and lowering and fixing a conventional hull on a trailer, and prevent the hull from being damaged.

When sailing on water, the wheels 15 are stored in the upper part of the hull, so that the wheels 15 do not hinder the cruising. It is possible to make the hull 2 difficult to sink.

In this embodiment, the wheel 15 is supported by a swing arm 21 so as to be able to move up and down, and the swing arm 21 is pivotally supported on the hull 2 by a swing shaft 22 so that the swing arm 21 and the hull 2 Since the shock absorber 24 is disposed between the vehicle and the vehicle, it is possible to suppress transmission of vibration due to unevenness of the road surface to the hull 2 during transportation.

A bolt member 27 is connected to the shock absorber 24, and a nut member 28 screwed to the bolt member 27 is rotatably supported by a holding member 26 attached and fixed to the hull 2, and the nut member 28 Operating handle 29
The wheel 15 is moved up and down between the transport position A and the cruising position B via the swing arm 21 by rotating the wheel 15, so that the wheel 15 can be moved by a simple operation just by rotating the operation handle 29. Can be raised and lowered.

In the present embodiment, the wheel cover 35 for covering the upper peripheral surface and the inner side surface of the wheel 15 is provided on the hull 2, so that it is possible to prevent the occupant from touching the wheel 15 during traveling and to prevent the wheel cover 35 can be used as a backrest or a seat, and a boat with a novel design can be provided.

In this embodiment, the hitch member 17 can be put in and out between the storage position C where the hitch member 17 is stored in the hull 2 and the connection position D where the hitch member 17 is connected to the towing vehicle. 2 when hitch member 17 is connected to position D
By pulling out the hull itself will run,
A conventional dedicated trailer can be dispensed with, and the same effect as above can be obtained.

Since the storage case 40 for storing the hitch member 17 is provided on the hull 2 and the cover plate 42 is disposed in the storage case 40 so as to be openable and closable. It can be stored without exposing it to the outside, so that it does not deteriorate the appearance or obstruct it.

In this embodiment, the hitch member 17
A connecting shaft 41 disposed and fixed at the tip of the hull 2, a hanging arm 45 rotatably connected to the connecting shaft 41,
The front and rear arm portions 51 and 52 are folded into the hanging arm 45 because the connecting arm 47 is divided into front and rear arm portions 51 and 52 foldably connected to the hanging arm 45. It can be stored in the storage case 40 in the state, the storage space can be reduced, and the storage case 40 can be downsized.

Further, an anchor roller 43 is connected to the connecting shaft 41.
Are mounted rotatably so as to be exposed to the outside, so that the anchor roller 43 can be attached by effectively utilizing the connecting shaft 41, which is a component of the hitch member 17, and the number of parts when separately attached is increased. Can be prevented.

In the above embodiment, the hitch member 1
Although the case where 7 is housed and arranged in the hull 2 has been described as an example, in the present invention, the hull front may be mounted on a bogie provided with a hitch member. In this case, the hull mounting length of the bogie can be reduced, and the size can be reduced as compared with a conventional trailer having a length extending over the entire hull length.

In the above embodiment, the hitch member 1
Although the description has been given of the case where the entire component 7 is stored in the storage case 40 of the hull 2, the present invention is not limited to this. For example, as shown in FIGS. 13 and 14, an attachment holder 70 having an upward U-shape is fixed to the tip of the hull 2, and a hitch member attachment 71 is inserted into the attachment holder 70 by inserting a plurality of pins 72, 72 into the attachment holder 70.
You may make it connect detachably. Each of the pins 72 is provided with a beta pin 73 for preventing the pin from coming off. Reference numeral 74 denotes an auxiliary wheel connected to the hitch member attachment 71, and reference numeral 75 denotes a hitch coupler.

The attachment holder 70 is fixed to the hull 2 and the hitch member attachment 71 is detachably connected to the attachment holder 70 by the pin 72. Can transport itself. Further, since the hitch member attachment 71 is carried by a towing vehicle, an increase in weight when mounted on the hull can be avoided.

Further, in the above embodiment, the case where the upper portion and the inner surface of the outer peripheral surface of the wheel 15 are covered with the wheel cover 35 has been described, but the cover structure of the present invention is not limited to this. For example, as shown in FIG. 15, the entirety of the swing arm 21 and the like constituting the wheel 15 and the wheel support mechanism 16 at the storage position B is covered by a wheel cover 80, and the wheel cover 80 has a wing shape in a side view. In this case, a pattern or the like for enhancing the design effect may be printed on the surface of the wheel cover 80. By doing so, the appearance can be improved, and a boat with a novel design can be provided.

[Brief description of the drawings]

FIG. 1 is a side view of a towed small boat according to an embodiment of the present invention.

FIG. 2 is a plan view of the towing small boat.

FIG. 3 is a side view of a wheel support mechanism of the towing small boat.

4 is a sectional view of a swing arm portion of the wheel support mechanism (a sectional view taken along line IV-IV in FIG. 3).

5 is a sectional view of a wheel portion of the wheel support mechanism (a sectional view taken along line VV in FIG. 3).

FIG. 6 is a plan view of a side brake mechanism provided in the wheel support mechanism.

FIG. 7 is a plan view showing a braking state of the side brake mechanism.

FIG. 8 is a plan view showing a stored state of a hitch member of the towing type small boat.

FIG. 9 is a plan view of a storage case in which the hitch member is stored.

FIG. 10 is a side view showing a connection state of the hitch member.

FIG. 11 is a diagram showing a procedure for taking the hitch member in and out.

FIG. 12 is a diagram showing a procedure for taking the hitch member in and out.

FIG. 13 is a side view showing a connection state of a hitch member according to another example of the embodiment.

FIG. 14 is a plan view showing a connection state of the hitch members.

FIG. 15 is a side view showing a wheel cover according to another embodiment of the above embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Towing small boat 2 Hull 2b Left and right side wall 15 Wheel 16 Car end support mechanism 21 Swing arm 24 Buffer 25 Operation mechanism (elevation mechanism) 27 Bolt member 28 Nut member 29 Operation handle 35, 80 Wheel cover A Transportation position B Storage position

Claims (4)

[Claims] 1. Wheels disposed on outer sides of left and right side walls of a hull, and wheel supports for supporting the wheels so as to be able to ascend and descend between a transport position where the wheels are in contact with a road surface and a running position where the wheels are stored above the hull. A tow-type small boat comprising a mechanism. 2. The oscillating arm according to claim 1, wherein the wheel supporting mechanism rotatably supports the wheels and is supported by the hull so as to be vertically oscillatable. And a lifting mechanism that raises and lowers the swing arm together with the shock absorber to any of the transport position and the cruising position. Type small boat. 3. The lifting mechanism according to claim 1, wherein the lifting mechanism includes a bolt member connected to the shock absorber, a nut member screwed to the bolt member, and rotatably supported by the hull. An operation handle for raising and lowering the oscillating arm via the bolt member by rotating a nut member. 4. The traction type according to claim 1, wherein the hull is provided with a wheel cover that covers at least an upper portion of an outer peripheral surface of the wheel at the cruising position. Small ship.