JP2001347878A - Boat trailer with crane mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a boat trailer with a crane mechanism that can lower a, boat from a deck of a trailer or load the boat. SOLUTION: This boat trailer 10 with tires 27, 28 rotatably journalled to the left and right sides of a lower part and with the boat A placed on the upper face, is towed by an automobile to convey the boat A. The boat trailer 10 is composed of a crane part 13 fixed to the corner of the trailer 10 with an elongated mast 92 erected almost vertically, and a crane arm part 110 placed in a horizontally rotatable manner at the top of the mast 92 of the crane part 13, with an arm 116 extending in the horizontal direction and with a wire 123 for lifting the boat A, hanging from the tip of the arm 116.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a motor boat,
The present invention relates to a trailer for transporting a boat which is a boat such as a rowing boat or a jet ski (registered trademark), and a boat trailer with a crane mechanism capable of hanging a loaded boat from a loading platform or loading the boat.

[0002]

2. Description of the Related Art Conventionally, marine sports using boats such as motor boats, rowing boats, and jet skis have become popular. When such a boat is not used, it is often stored moored on the coast or river. However, there are limited places for mooring boats on Japanese coasts and rivers. It is customary to store boats in warehouses at homes away from shores and rivers. For this reason, boat trailers have been used to transport boats from coasts and rivers to homes and warehouses by land. In a boat trailer, tires are provided on the lower left and right sides of a vehicle body, and can be towed by a car. The use of a boat trailer allows a heavy boat to be mounted on a carrier and traveled over long distances by towing with a car.

Conventionally, a boat is mounted on the bed of a boat trailer by using a gentle sandy beach or by using a concrete landing site which is inclined and extended into seawater or river water. Was customary. Float a boat on the sea or river, put a boat trailer in the sea or underwater from the beach or landing site, and sink the boat trailer in seawater or river water. If you move the levitating boat above the boat trailer bed and place the boat on the bed,
Raise the boat trailer with the boat using the slope of the beach or the landing. By this operation, a boat weighing 100 kg or more can be mounted on a boat trailer without requiring a large gimmick. Conversely, to float a boat loaded from a boat trailer on the sea or river, move the boat trailer on the beach or unloading place with the boat mounted, sink the boat trailer in seawater or underwater, and float only the boat Can be separated by Once the boat is lifted, only the boat trailer can be lifted ashore along the beach and landing slopes. Boat trailers having such a configuration have been used for a long time, and there has been no major change in the structure or operation method.

[0004] However, seashores and rivers in Japan are actively being revetd to prevent erosion of sandy beaches by seawater and flooding of rivers. In revetment work, concrete revetments are built along the shoreline and riverbed to separate the road from the shore and river. As a result, the number of naturally sloping beaches and riverbeds has become extremely small, and the number of places where a boat-mounted trailer with tires can be submerged in seawater or underwater is decreasing. Even if you put a boat on a boat trailer and come near the coast or river,
Blocked by concrete revetments, the terrain where boat trailers can sink into sea or river water is diminishing. This hindered the development of marine sports in the country.

[0005] In order to eliminate such inconvenience, fixed boat cranes are also used. A fixed boat crane is provided close to a concrete revetment wall, and can be used to suspend a boat on a sea surface or a river surface by wire, or to lift the boat. But
Such fixed boat cranes cannot be used unless they are installed, and boats cannot be lifted from the boat trailer in other places where fixed boat cranes are not installed. The places where you can do it were limited. Therefore, no matter where on the coast or in the river, if a boat can be loaded and unloaded from a boat trailer, the boat trailer can travel anywhere along the road,
The range where the boat could be used was widened.

In view of such circumstances, the same inventor as the present invention has filed a patent application for a boat trailer with a crane mechanism in Japanese Patent Application No. 94031. In this application, a crane can be assembled on the side of a boat trailer so that the crane can load and unload a boat on a boat trailer carrier. In this configuration, as long as the boat trailer can be pulled by a car, a crane can be assembled at that place to load and unload the boat. For this reason, it became possible to lower or lift the boat on the sea surface, water surface, or lake surface without using a beach or an inclined slope as in the related art. In this way, marine sports using boats can be enjoyed anywhere in the country, and the features of the terrain do not limit the range of boats that can be used, and boats can be used extensively at any time and anywhere.

However, with this newly proposed structure, when loading and unloading a boat, it is necessary to assemble the crane mechanism on the side of the boat trailer at the site, which is cumbersome. Also, mount the boat on a boat trailer,
When towing by car, it was necessary to disassemble and remove the crane mechanism from the side of the boat trailer. This kind of assembling and disassembling work is a secondary work different from the original work of suspending or lifting a boat on the sea surface or water surface, and it is troublesome to spend time on such work. Was something. Also, urgently unload boats from boat trailers, or
Loading a boat onto a boat trailer from the surface of the sea or water has been a waste of time and lacked in speed.

In view of the conventional drawbacks, the present invention has a structure in which a mast is vertically fixed to a corner of a boat trailer, and a function as a crane can be exhibited by pulling out auxiliary legs. With this mechanism, it is possible to immediately load and unload a boat at the place where a boat trailer is transported by a car, without requiring secondary operations such as assembly and disassembly. . Therefore, there is no need to assemble or disassemble the crane mechanism, and the present invention provides a boat trailer with a crane mechanism capable of quickly loading and unloading a boat from a boat trailer.

[0009]

SUMMARY OF THE INVENTION The present invention is directed to a boat trailer which rotatably supports tires on the lower left and right sides, mounts a boat on an upper surface, and conveys the boat by being pulled by an automobile. The crane part, which is fixed to the corner of the crane and has an elongated mast standing upright, is mounted on the top of the mast of the crane part so that it can rotate freely in the horizontal direction.The arm extends slightly in the horizontal direction, and the boat And a crane arm portion having a wire hanging from the crane. A boat trailer with a crane mechanism is provided (claim 1).

The present invention relates to a boat trailer which rotatably supports tires on the lower left and right sides, mounts a boat on an upper surface, and transports the boat by being pulled by an automobile. It consists of a supported trailer section and a crane frame section that has a frame shape wider than the side face of the trailer section and is fixed to the upper surface of the trailer section, and is fixed to a corner of the crane frame section. And a crane with an elongated mast standing upright, and a wire that is mounted on the top of the crane mast so that it can rotate freely in the horizontal direction, extends its arm slightly in the horizontal direction, and suspends the boat from its tip. The present invention provides a boat trailer with a crane mechanism, comprising a hanging crane arm.

According to the present invention, the mast of the crane portion is hollow inside and has a lower end opening. An extendable leg is inserted from the lower end opening, and the extendable leg is fixed at a free position to the mast by a temporary fixing mechanism. It is intended to provide a boat trailer with a crane mechanism, which is capable of being performed.

According to the present invention, there is provided a crane mechanism in which at least one of the side surfaces of the trailer is provided with a balance leg which can be stored on the upper surface of the trailer when not in use and which can be turned upside down to contact the ground. The present invention provides a boat trailer provided with the present invention (claim 4).

The present invention is characterized in that at least one of the side surfaces of the crane frame portion is provided with a balance leg which can be stored on the upper surface of the crane frame portion when not in use and which can be turned on the ground by turning over. (Claim 5).

According to the present invention, the balance leg has an elongated leg support having an upper side surface rotatably connected to a side surface of a trailer or a crane frame portion, and a flat plate rotatably connected to a lower portion of the leg support portion. It is composed of a tread-shaped footboard.When using it, the footboard is brought into contact with the ground, and the leg support is raised vertically downward, and when stored, the leg support is turned upside down and raised vertically, A boat trailer with a crane mechanism characterized by being inverted so as to be parallel to a leg support (claim 6).

[0015]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a state in which a boat A is mounted on a boat trailer 10 with a crane function according to an embodiment of the present invention, and is separated from a car towing the boat trailer 10 and parked in a garage or a parking lot. In the state shown in FIG. 1, the rear of the vehicle is connected to the boat trailer 10, and the boat trailer 10 is connected to the boat A.
You can move the entire road. The boat A can be lifted from the sea surface, water surface, or lake surface, moved to a garage or a garage at home, or transported to a distant sea, river, lake, or the like.

The overall structure of the boat trailer 10 is composed of two large skeletons, a trailer section 11 and an auxiliary frame section 12, both of which are integrally assembled. The trailer unit 11 supports the roller 30 and the tires 27 and 28 at three lower portions thereof, and has a function of moving the boat trailer 10. At the front side (left front side in FIG. 1) of the trailer section 11, a bow presser 3 is provided.
1 is provided. Bottom pads 71 and 72 as cushioning materials are arranged in parallel on the upper surface of the auxiliary frame portion 12. The bottom of the boat A is placed on both bottom pads 33 and 34, and the bow of the boat A is brought into contact with the bow presser 31. Thus, the boat A can be stably mounted and fixed on the boat trailer 10. FIG. 1 shows a state in which a boat trailer 10 carrying a boat A is stored in a garage or a parking lot.
By pressing, the roller 30, the tires 27 and 28 roll, and the boat trailer 10 can be moved. When the boat A is to be moved to another place, the joint 32 is connected to a trailer hitch 178 (shown in FIG. 9) fixed to the rear of the car B, and the roller 30 is pulled up from the ground, and only the tires 27 and 28 are used. Supports the boat trailer 10. Next, the boat trailer 10 is driven by the automobile B.
, And the boat A can be transported over a long distance section.

Next, the configuration of the boat trailer 10 will be described in detail with reference to FIGS. FIG. 2 shows the trailer unit 11 and the auxiliary frame unit 12 which are the framework of the boat trailer 10 separated vertically, and FIG. 3 shows the state before the trailer unit 11 and the auxiliary frame unit 12 are assembled and various components are attached. It shows.

The boat trailer 10 comprises a trailer portion 11 having a Y-shape and an auxiliary frame portion 12 having a square frame shape. The inner shape of the auxiliary frame portion 12 is slightly larger than the outer shape of the trailer portion 11,
When the lower surface of the auxiliary frame portion 12 is brought into close contact with the upper surface of the trailer portion 11, the dimensions are set such that the outer frames of the auxiliary frame portion 12 are located on the left and right of the tires 27 and 28 of the trailer portion 11. Trailer section 11 and auxiliary frame section 1
2 is joined by bolting using metal fittings, and both are assembled so as to be integrated.

The structure of the trailer section 11 is substantially the same as the trailer conventionally used for transporting the boat A. The skeleton of the trailer section 11 is made of a lightweight aggregate having a rectangular cross section formed by drawing aluminum and having a U-shaped cross section. The front side is narrowed and the rear side is widened.
It is assembled in a shape like a letter. A right channel 21 and a left channel 22 are disposed on the left and right side surfaces of the trailer unit 11, respectively, and each is bent in a slightly U shape. When the tips of the right channel 21 and the left channel 22 (the left front side in FIG. 2) are joined, the left and right side surfaces are gently spread, and the rear halves of the right channel 21 and the left channel 22 are arranged in parallel. Combined right channel 21 and left channel 22
Is connected to a straight tow bar 25 in the shape of a hollow pipe having a hollow inside. These right channel 2
1, the left channel 22, and the traction bar 25 form a slightly Y-shaped frame with the traction bar 25 at the top and gently enlarged on both sides, with the rear part parallel. The frame can support the load of the boat A and also support the tractive force when the boat trailer 10 moves.
(Hereinafter, the right side in the figure refers to the position on the right side when viewed from the right back to the left side of the paper. This is the state when viewed in the traveling direction of the trailer unit 11, and determines the left and right positions. .)

Right channel 21, left channel 22
The leaf springs 23 and 24 are respectively fixed to the lower surfaces of the center portions of the latter half which are parallel to each other. An axle 26 is disposed between the lower surfaces of the leaf springs 23 and 24, and the axle 26 is a leaf spring. 2
It is elastically held by 3 and 24. This axle 2
6, a tire 27 is rotatably supported at a position outside the right channel 21 at the right end (left rear in FIG. 2), and a left end channel (right front in FIG. 2) of the axle 26. A tire 28 is rotatably supported on the outer side of the tire 22. A front leg 29 that can expand and contract in the vertical direction is fixed to the tip of the tow bar 25, and a roller 30 is rotatably supported below the front leg 29. On the upper surface of the front part (left front in FIG. 2) of the tow bar 25, a bow retainer 31 opened in a C shape is fixed, and further, the tip of the tow bar 25 is connected to the trailer hitch 178 of the automobile B. Joint 32 is fixed. Further, L-shaped fixing brackets 35 and 36 are fixed to the inner wall surface of the right channel 21 at the center and rear thereof, and L-shaped fixing walls 35 and 36 are fixed to the inner wall surface of the left channel 22 at the center and rear thereof. The fixed fittings 37 and 38 are fixed. Each of the fixing brackets 35, 36, 37, and 38 is arranged with a horizontal surface facing upward, and is formed with an opening (not shown) through which a bolt passes.

The structure of the trailer unit 11 assembled in this manner is substantially the same as the structure of a conventionally known boat trailer. Therefore, the object of the present invention can be achieved even if a boat trailer other than the structure shown in FIG. 2 is used.

Next, the auxiliary frame portion 12 welds the right horizontal pipe 41, the left horizontal pipe 42, the front pipe 43, the intermediate pipe 44, the rear pipe 45, and the auxiliary pipe 46 which are square hollow pipes having a rectangular cross section. It is configured by combining them. The length of the right side pipe 41 and the left side pipe 42 is slightly longer than the straight portions of the right channel 21 and the left channel 22 as shown in FIG.
4. The rear pipe 45 is set to be slightly longer than both side ends of the left and right tires 27 and 28. To assemble the auxiliary frame part 12, the right horizontal pipe 41 and the left horizontal pipe 4
2 are arranged in parallel, a front pipe 43 is arranged between the front ends of the right side pipe 41 and the left side pipe 42 (front left in FIG. 2), and the rear ends of the right side pipe 41 and the left side pipe 42 (FIG. 2). The rear pipe 45 is arranged between the middle right and the rear, and the intermediate pipe 44 is arranged inside the right horizontal pipe 41 and the left horizontal pipe 42 and at a position slightly closer to the front pipe 43. The front pipe 43, the middle pipe 44, and the rear pipe 45 are arranged so as to be parallel to each other, and the right horizontal pipe 41 and the left horizontal pipe 42 are arranged so as to be at right angles. Then, the respective joining surfaces are connected by welding, and the right side pipe 41 and the left side pipe 4
2. Assemble into a large rectangular frame integrated with the front pipe 43, the middle pipe 44 and the rear pipe 45. Further, one end of an auxiliary pipe 46 having a short length is welded to a position inside the right lateral pipe 41 and near the rear pipe 45 so as to be parallel to the rear pipe 45. Only one end of the auxiliary pipe 46 is held by the right horizontal pipe 41, and the other end is floating without any connection.

The front side of the right horizontal pipe 41 (the left front side in FIG. 2).
A stay fixing piece 47, which is obtained by cutting a thin steel plate into a rectangle and forming an opening in the center, is fixed to the upper surface of the plate. A leg turning piece 48 is fixed to the front end of the upper surface of the right horizontal pipe 41, and a leg connecting piece 49 is fixed to the front end of the lower surface of the right horizontal pipe 41. Has leg connecting piece 5
0 is fixed. Leg turning piece 48, leg connecting pieces 49, 50
Each has a rectangular shape obtained by cutting a thin steel plate, has an opening formed in the center, and is arranged so as to be on the same plane.

A leg turning piece 51 is fixed to the front end of the upper surface of the left horizontal pipe 42, and a leg connecting piece 52 is fixed to the front end of the lower surface of the left horizontal pipe 42. A leg connecting piece 53 is fixed to the left side. Each of the leg turning pieces 51 and the leg connecting pieces 52 and 53 has a rectangular shape obtained by cutting a thin steel plate, has an opening in the center, and is arranged so as to be on the same plane. Further, a leg turning piece 54 is fixed to the rear end of the upper surface of the left horizontal pipe 42,
A leg connecting piece 55 is fixed to the rear end of the lower surface of the left lateral pipe 42, and a leg connecting piece 56 is fixed to the left side of the upper surface of the rear pipe 45. Each of the leg turning pieces 54 and the leg connecting pieces 55 and 56 has a rectangular shape obtained by cutting a thin steel plate, has an opening in the center, and is arranged so as to be on the same plane.

The auxiliary frame 12 assembled in this manner has a frame shape with a large opening, and the distance between the inner walls of the right lateral pipe 41 and the left lateral pipe 42 is equal to that of the tires 27 and 2.
8 is slightly longer than the distance outside. The interval between the intermediate pipe 44 and the rear pipe 45 is the tire 27,
28 is set to be much longer than the outer diameter. The distance between the front pipe 43 and the rear pipe 45 is set to be the distance from the center of the gentle shoulder of the right channel 21 and the left channel 22 to the rear end.

To combine the frame-assembled auxiliary frame section 12 with the trailer section 11, the front pipe 4 is provided on the upper surfaces of the right channel 21 and the left channel 22.
3. The lower surfaces of the intermediate pipe 44 and the rear pipe 45 are placed in contact with each other. At this time, the tires 27 and 28 are positioned inside a square space formed by the right horizontal pipe 41, the left horizontal pipe 42, the intermediate pipe 44, and the rear pipe 45.
The lower surface of the tip of the auxiliary pipe 46 is connected to the right channel 2.
1 so as to be in contact with the upper surface thereof.

Next, the trailer section 11 and the crane frame section 12 are connected. For this connection, six fastening fittings 61, 62, 63, 64, 65, 66 and two crimping fittings 67, 68 are used. Fastening bracket 6
1, 62, 63, 64, 65 and 66 are each formed by bending a round bar into a U-shape, and the space inside the U-shape is the same as the width of the front pipe 43, the middle pipe 44, and the rear pipe 45. , And each end is formed with a screw. The crimping fittings 67 and 68 are formed by bending the center of a rectangular thin steel plate into a U-shape, with both ends facing outward, and having a screw hole opened in a flat surface that opens outward. The fasteners 61 and 62 are inserted from above the intermediate pipe 44 with the openings of the fasteners 61 and 62 facing downward, both ends of the fastener 61 are connected to the fixture 35, and both ends of the fastener 62 are fixed to the fixture 37. Similarly, the fastening bracket 63,
The opening 64 is directed downward from above the rear pipe 45, and both ends of the fastening member 63 are connected to the fixing member 36, and both ends of the fastening member 64 are connected to the fixing member 38. Further, the crimp fitting 67 is fitted from below the shoulder portion of the right channel 21 and is inserted from above the front pipe 43 with the opening of the clamping fitting 65 facing downward, and both ends of the clamping fitting 65 are connected to the crimp fitting 67. further,
The crimp fitting 68 is fitted from below the shoulder portion of the left channel 22 and is inserted from above the front pipe 43 with the opening of the clamp 66 facing downward.
Are connected to the crimp fitting 68. Thus, the crane frame part 12 is placed on the trailer part 11,
Both are integrally fixed, and the skeleton of the boat trailer 10 with a crane function is assembled.

FIG. 3 shows that after assembling the skeleton of the boat trailer 10 by the trailer section 11 and the crane frame section 12 according to the procedure of FIG. 2, various members such as a crane mechanism and fixing balance legs 85, 86, 87 are attached. This shows the procedure for mounting.

Bottom pad 7 in contact with the bottom of boat A
1, 72, for example, provided a skeleton of steel at the center thereof,
The cross section of the upper surface covered with a material such as flexible plastic has the shape of a square member having a square shape, and has a flexibility not to be damaged even if it comes into contact with the bottom of the boat A. Supporting brackets 73 and 74 are fixed vertically before and after the lower surface of the bottom pad 71, and supporting brackets 75 and 76 are vertically fixed before and after the lower surface of the bottom pad 72. The distance between the support brackets 73 and 74, the support brackets 75 and 7
The interval 6 is set to be the same as the interval between the intermediate pipe 44 and the rear pipe 45. Also, each support bracket 75,
Openings for fixing are opened up and down in 76, 73 and 74.

To fix the bottom pads 71 and 72, fastening members 77, 78, 79 and 80 are used. Each of the fastening members 77, 78, 79, and 80 is formed by bending a round bar into a U-shape, and has male threads at both ends.
The U-shaped inner widths of the fastening members 77, 78, 79, and 80 are set to be substantially the same as the upper and lower thicknesses of the intermediate pipe 44 and the rear pipe 45. These bottom pads 71,
In order to fix the 72 to the crane frame 12, the support brackets 73, 74, 75,
3 and 75 are provided on the front side of the intermediate pipe 44,
76 are brought into contact with the front side surfaces of the rear pipe 45, respectively. Then, the fastening members 77 and 79 are fitted into the U-shaped openings from the rear side of the intermediate pipe 44, the fastening member 77 is connected to the support member 73, and the fastening member 79 is connected to the support member 7.
Connect to 5. Also, the U-shaped openings are fitted into the fastening members 78 and 80 from the rear side surface of the rear pipe 45, and the fastening members 78 are connected to the support members 74.
Is connected to the supporting bracket 76. According to this procedure, a pair of ship bottom pads 71 and 72 are provided on the upper surface of the crane frame 12.
Are placed parallel and horizontally.

Next, balance legs 85, 86 and 87 are combined with the three corners of the crane frame portion 12, respectively. These balance legs 85, 86, 87 are not taken out when the boat trailer 10 is moved or stored, and are stored so as not to be in the way.
Is suspended from the boat trailer 10 to prevent the boat from falling down.

The balance leg 85 is a square pipe-shaped leg support 14.
5 and a foot plate 146 in the form of a flat plate having a home base shape. The upper part of the leg support 145 and the leg turning piece 48 are rotatably connected. The balance leg 86 includes a leg support 147 having a square pipe shape and a flat plate-like tread plate 148 having a home base shape.
The upper part of the leg support 147 and the leg turning piece 51 are rotatably connected. The balance leg 87 includes a leg support 149 having a square pipe shape and a flat tread plate 150 having a home base shape. An upper portion of the leg support 149 and the leg turning piece 54 are rotatably connected (each balance). Legs 85, 8
The configurations of 6, 87 are described in detail with reference to FIG. ).
Each of the balance legs 85, 86, 87 is a leg rotation piece 4
It can be turned up and down around 8, 51 and 54, and when not in use, it can be turned and stored in the upper side surface of the crane frame portion 12.

At the right rear corner of the crane frame 12, a crane 13 capable of lifting the boat A is mounted. The crane unit 13 includes a main mast 92 and a mast support plate 91. The mast support plate 91 obtained by cutting a steel plate into a rectangle forms a U-shaped frame of the right horizontal pipe 41, the rear pipe 45, and the auxiliary pipe 46. , And the mast support plate 91 and the right lateral pipe 41, the rear pipe 45, and the auxiliary pipe 46 are fastened and fixed by bolts. When the crane section 13 is placed on the crane frame section 12 in this way, the axis of the mast 92 is held perpendicular to the plane of the crane frame section 12. One end of the tension wire 176 is connected to the wire hole 99 opened at the upper end of the mast 92, and the other end of the tension wire 176 is connected to the stay fixing piece 47.
6 supports a part of the stress applied to the mast 92. FIG. 1 shows a state in which such members are assembled and completed. Therefore, the boat trailer 10 of this embodiment can be said to have a shape in which a square frame is fixed to a conventional boat trailer, and the crane unit 13 is mounted and fixed at the corner of the frame.

FIG. 4 is an exploded perspective view showing the vicinity of the mast 92 of the crane unit 13, FIG. 5 is a sectional view showing the structure of the lower half of the crane unit 13, and FIG. 2 shows the configuration of the crane arm unit 110 thus constructed.

The central portion of the crane portion 13 is a tough internal hollow pipe-shaped mast 92. When the crane portion 13 is mounted on the crane frame portion 12, the upper end of the mast 92 is It is set to be higher than the upper surface. The center of a rectangular mast support plate 91 is in close contact with the lower end of the mast 92, and between the periphery of the lower side surface of the mast 92 and the upper surface of the mast support plate 91, reinforcing pieces 93 are formed radially in four directions. Is arranged. Each of the reinforcing pieces 93 is obtained by cutting a thin steel plate into an elongated shape, and the side surfaces of the reinforcing pieces 93 and the peripheral surface of the mast 92, and the lower end of the reinforcing pieces 93 and the upper surface of the mast support plate 91 are fixed by welding. Each reinforcing piece 93 firmly couples the mast 92 to the mast support plate 91 to prevent the mast 92 from falling over. The mast support plate 91 is formed by processing a slightly thicker steel plate into a rectangular shape, and a plurality of bolt holes 94 are opened vertically around three sides of the mast support plate 91. Bolts are inserted into these bolt holes 94 and the right horizontal pipe 4
1, for fixing to the rear pipe 45 and the auxiliary pipe 46. On the lower side surface of the mast 92, a pin hole 95 is opened in a straight line in the horizontal direction, so that a stopper pin 96 can be inserted. A ring-shaped support ring 98 is fixed to a position slightly below the upper end of the mast 92, and a large diameter portion bulging outward is formed on the upper outer periphery of the mast 92, and a wire hole is formed at the upper end of the mast 92. 99 is open.

The center of the above-mentioned mast support plate 91 is shown in FIG.
Although not visible in FIG. 5, an opening penetrating vertically is formed as shown in FIG. 5, and this opening is set to be substantially the same as the inner diameter of the mast 92, and their axes are aligned. For this reason,
The lower end opening of the mast 92 penetrates through the mast support plate 91 and is opened downward, and a telescopic leg 100 having a cylindrical shape is slidably inserted from the upper end through the lower end opening.
The telescopic leg 100 has a hollow internal pipe shape, the outer diameter of which is substantially equal to the inner diameter of the mast 92, and the telescopic leg 100 is configured to be able to expand and contract with respect to the mast 92 in the vertical direction. At the lower end of the telescopic leg 100, a ground plate 101 made of a thin steel plate processed into a circular shape is fixed.
An upper pin hole 102 is opened in a straight line in a horizontal direction on an upper side surface of the lower leg 0, and a lower pin hole 103 is opened in a horizontal direction on a lower side surface of the telescopic leg 100.

A wire hole 99 for hooking the tension wire 176 is formed on the upper side surface of the mast 92 facing the auxiliary pipe 46. A mast cap 111 that supports the entire winch mechanism described below is inserted into the upper part of the mast 92. The mast cap 111 is in the shape of a pipe with an inner hollow opening at the top and bottom, and its inner diameter is set to be substantially the same as the outer diameter of the mast 92. When the lower end lower opening of the mast cap 111 is inserted from the upper end of the mast 92, the lower surface of the mast cap 111 contacts the upper surface of the support ring 98, and the mast cap 111 is supported without falling. At the same time, since the lower surface of the mast cap 111 can slide on the upper surface of the support ring 98, the mast cap 111 is held so as to freely rotate in the horizontal direction with the mast 92 as the center of rotation.

FIG. 5 shows the mast 92 shown in FIG.
The mast support plate 91 is placed on the upper surfaces of the rear pipe 45 and the auxiliary pipe 46. The bolts 104 and 105 are inserted from the bolt holes 94 of the mast support plate 91 into the auxiliary pipe 46 and the rear pipe 45, and the ends thereof are tightened with nuts, so that the mast support plate 91 is firmly attached to the rear pipe 45 and the auxiliary pipe 46. Installed. After fixing the mast support plate 91 to the rear pipe 45 and the auxiliary pipe 46, the tension wire 1 is inserted into a wire hole 99 opened at the upper end of the mast 92.
The other end of the tension wire 176 is connected to the stay fixing piece 47.

The above-mentioned telescopic leg 100 can be housed in the mast 92 or extended downward to switch its position, and has a function as a temporary fixed leg. The upper end of the telescopic leg 100 is inserted through the lower end opening of the mast 92 (also the opening of the mast support plate 91), and the stop pin 96 bent into an L shape is inserted into the pin hole 95.
And the lower pin hole 103 is inserted to fix them. A split pin 97 is inserted into the tip of the stop pin 96 from the side surface to prevent the stop pin 96 from being easily pulled out. In this state, the telescopic leg 100 is
2 and the ground plate 101 is separated from the ground E. These pin holes 95, stop pins 96, upper pin holes 10
2. The telescopic leg 100 is mounted on the mast 92 by the lower pin hole 103.
A temporary fixing mechanism that can change and fix the position in two steps up and down is provided.

In order to pull out the telescopic leg 100 from the mast 92 and use it as a temporary fixed leg, the stopper pin 96 can be pulled out from the pin hole 95 and the lower pin hole 103 to move the telescopic leg 100 freely with respect to the mast 92. Open. Next, the telescopic leg 100 is slid downward from the mast 92,
The axis of the pin hole 95 is aligned with the axis of the upper pin hole 102, and the stop pin 96 is inserted from the side of the mast 92. Then, the telescopic leg 100-2 is pulled out from the lower end opening of the mast 92,
The lower surface of the ground plate 101-2 is kept in contact with the ground E. Therefore, the mast 92 (the crane frame 1
(Including the load from No. 2) is supported by the telescopic legs 100-2, and prevents the entire boat trailer 10 from inclining or falling due to the load for suspending the boat A.

FIG. 6 shows a crane arm 1 mounted on the mast 92 of the crane 13 described above.
10 shows the configuration of FIG. An upper connecting piece 112 is provided on the upper part of the side surface of the pipe-shaped mast cap 111.
However, the lower connecting piece 114 is fixed to the lower part, and the upper connecting piece 112 and the lower connecting piece 114 are arranged so that the planes thereof are perpendicular to the vertical direction. A screw hole 113 is opened on a side surface of the upper connection piece 112, and a screw hole 115 is opened on a side surface of the lower connection piece 114. The arm 116 suspends the boat A and supports the load. The arm 116 is formed by cutting a tough steel material into an elongated plate shape, and its length can be understood from FIG. Thus, the width of the crane frame portion 12 is about half. A pair of small shaft plates 1 are provided on the left and right surfaces of the rear end of the arm 116 (the left rear side in FIG. 6).
17 are fixed, and a screw hole 118 is opened in each shaft plate 117. Further, a pair of small shaft plates 124 are fixed to the left and right surfaces of the tip (right front side in FIG. 6) of the arm 116, and a pulley 12 is provided between the pair of shaft plates 124.
5 is supported. On the left and right sides of the center of the arm 116,
A pair of winch tables 121 each having a L-shaped cross section are fixed, and the upper surfaces of both winch tables 121 are flat. Further, a support piece 127 is provided on the central lower surface of the arm 116.
Are fixed, and the bolt holes 12
8 is open.

In order to connect the arm 116 to the mast cap 111, the upper connecting piece 112 is inserted between the pair of shaft plates 117, the bolt 135 is inserted into the screw holes 113 and 118, and the tip of the bolt 135 is 136 is screwed. The rear end of the arm 116 is connected to the upper connecting piece 112 by a bolt 135, and the arm 116 is connected to the mast cap 11
1 and is connected to be able to swing up and down. This arm 1
It is the hydraulic cylinder 1 that supports 16 while swinging up and down.
29, a cylinder rod 130 is inserted from the tip of a cylindrical hydraulic cylinder 129 so as to be able to expand and contract. A bolt hole 131 is opened at the base of the hydraulic cylinder 129, and a bolt hole 132 is opened at the tip of the cylinder rod 130. The bolt hole 131 is aligned with the screw hole 115, the bolt 137 is inserted into both, and the nut 138 is screwed into the tip of the bolt 137, thereby connecting the base of the hydraulic cylinder 129 to the lower connecting piece 114. Then, the bolt holes 132 are aligned with the bolt holes 128, a bolt 139 is inserted into both of them, and a nut 140 is screwed into a tip of the bolt 139, whereby the cylinder rod 13 is rotated.
0 is connected to the support piece 127. By connecting in this manner, the mast cap 111, the arm 116,
The triangular link mechanism is formed by the hydraulic cylinder 129 and the cylinder rod 130, and the hydraulic pressure supplied to the hydraulic cylinder 129 causes the cylinder rod 130 to expand and contract, thereby changing the angle of the arm 116 and swinging up and down. Can be moved.

A winch 122 is mounted and fixed on the upper surface of the winch table 121. The winch 122 has a built-in drum operated by an electric motor, and the wire 123 can be moved forward and backward by rotating the drum. it can. The wire 123 extended from the winch 122 is directed toward the tip of the arm 116 and hangs downward by contacting the pulley 125. A hook 126 having a hook shape is connected to the tip of the wire 123. The crane arm 110 thus assembled is attached to the side surface of the mast cap 111. When the mast cap 111 rotates around the mast 92, the entire crane arm 110 also rotates horizontally.

FIG. 7 is an exploded view of the structure of the balance leg 86 attached to the left front corner of the crane frame 12, and the other balance legs 85 and 87 have the same structure as that shown in FIG. And the operation is the same.

As described above, the upper and lower surfaces of the tip (left front side in FIG. 7) of the left horizontal pipe 42 are respectively provided with the leg turning pieces 5.
1. The leg connecting piece 52 is fixed, and the leg connecting piece 53 is fixed on the upper surface of the front pipe 43. The plane of each of the leg rotation piece 51 and the leg connection pieces 52 and 53 is perpendicular to the left horizontal pipe 42 and the front pipe 43, and are arranged so as to be flush with each other. The leg rotation piece 51 has a bolt hole 16
1 has a pin hole 162 in the leg connecting piece 52 and a leg connecting piece 53
Are provided with pin holes 163, respectively. The leg support 147 that constitutes the balance leg 86 is a square pipe having a hollow inside, and is connected to the rotating piece 153 at a position above and below the upper end of one side surface (the left rear side in FIG. 7) of the leg support 147. The piece 154 is fixed. The distance between the lower side of the rotating piece 153 and the upper side of the connecting piece 154 is set to be slightly larger than the vertical thickness of the left horizontal pipe 42. A bolt hole 157 is opened in the rotating piece 153, and a pin hole 158 is opened in the connecting piece 154, so that the bolt hole 157 and the pin hole 158 are formed.
Are made equal to the distance between the bolt hole 161 and the pin hole 162. A connecting piece 155 is fixed to the upper part of the other side surface (the right front side in FIG. 7) of the leg support 147, and a plate rotating piece 156 is fixed to the lower part. A pin hole 159 is formed in the connecting piece 155. A bolt hole 171 is opened in the rotating piece 156. The rotating piece 153 and the connecting piece 155 described above.
Is set substantially equal to the distance between the leg rotation piece 51 and the leg connection piece 53, and the distance between the axis of the bolt hole 157 and the pin hole 159 is equal to the distance between the axis of the bolt hole 161 and the pin hole 163. Let me do it.

The above-mentioned tread plate 148 is formed by cutting a thin steel plate into a shape like a baseball baseball, and has a rotating piece 170 fixed vertically at the center of the upper surface thereof. Has a bolt hole 172 opened. In order to assemble the balance leg 86 from the leg support 147 and the tread plate 148, the axes of the bolt holes 161 and 157 are aligned with each other, and the bolt 173 is inserted into both of them.
By screwing a nut 174 into the tip of the plate 73, the plate rotating piece 1
56 and the rotating piece 170 are connected. For this reason, bolt 1
The leg strut 147 and the tread plate 148 are connected by 73, and the leg plate 148 is provided with a play without tightening the bolt 173 and the nut 174.
7 so that it can freely rotate.

In order to connect the leg support 147 to the crane frame portion 12, the axes of the bolt holes 157 and 161 are aligned, the bolt 164 is inserted into both, and the bolt 164 is inserted.
A pair of nuts 165 are fastened to the end of the bracket with a double nut. In tightening the nut 165, the leg support 147 is provided with play so that the leg rotation piece 51 and the rotation piece 153 do not adhere to each other. Can rotate. To fix the leg support 147 downward, the axes of the pin holes 158 and 162 are aligned, a pin 166 is inserted between the two, and a split pin 167 for preventing falling off is inserted into the tip of the pin 166. The leg support 147 is raised downward, and in this state, the lower surface of the tread plate 148 contacts the ground, and can be used as a temporary leg.

FIG. 8 is an explanatory view showing the operation of the balance leg 86 assembled as described above. As shown in FIG. 7, the state in which the balance leg 86 is extended outside the boat trailer 10 to support the load is shown by a solid line in FIG. The state where the balance leg 86 is lifted upward and stored so as not to obstruct the running of the boat trailer 10 is indicated by a chain line in FIG.

As described above, the pin 166 is inserted into the pin hole 158.
And 162, the leg support 147 is held up and down by bolts 164 and pins 166, and rises vertically to the ground E. At this time, since the tread plate 148 is held horizontally, the lower end of the leg support 147 is placed on the upper surface of the tread plate 148, and the load of the crane frame portion 12 applied to the leg support 147 is distributed by the tread plate 148 having a large area. . In addition, when a heavy object or an automobile tire is placed on the upper surface of the tread plate 148 outside the crane frame portion 12, the weight becomes a weight when the load on the crane frame portion 12 fluctuates. It is also possible to prevent the boat trailer 10 from tipping over.

To accommodate the balance leg 86 for running the boat trailer 10, the pin 166 is inserted into the pin hole 1.
58, 162, the leg support 147 is rotated about the bolt 164 in the direction F in FIG. 8, and the balance leg 86 is turned over 180 degrees. Then, the head of the balance leg 86 reverses and stops at a position where it contacts the upper surface of the front pipe 43. Thereafter, the axes of the pin holes 159 and 163 are made to coincide with each other, and the pin 166 that has been pulled out is inserted between the two, and the split pin 167 is fitted into the tip of the pin 166. Then
As shown by the chain line in FIG.
3 is vertically raised above the bolt 164 and the pin 1
66 holds it in that position. And the footboard 14
8 in the direction G in FIG.
2 so that it hangs down inside. In such a position, no projections protrude outside the crane frame portion 12, and the traveling of the boat trailer 10 is not hindered.

FIG. 9 shows a state in which the boat A loaded by the trailer with a crane mechanism according to the present embodiment is loaded and unloaded from the boat trailer 10 and loaded. In FIG. 9, a trailer hitch 178 is fixed to the rear of the body of the automobile B.
The joint 32 is connected to the trailer hitch 178. This is a boat trailer 10 by car B
Is connected to the automobile B by the joint 32 because the variation in the load is supported by the weight of the automobile B when the boat A is suspended from the rear of the boat trailer 10. It is. In FIG. 9, the axis of the boat trailer 10 and the automobile B
Is drawn so as to be slightly shaped like an axis of the joint 32 and the joint 32 and the trailer hitch 1
This is for the purpose of showing the state of connection with the cable 78. In an actual operation, the axes of the car A and the boat trailer 10 are arranged so as to be straight. FIG. 9 shows a state of operation opposite to that of FIG. 1. FIG. 1 shows a state where the boat trailer 10 is being stored or running, and FIG. 9 shows a state where the crane unit 13 is operated.

When loading or unloading the boat A, the balance legs 85, 86, and 87 provided at three front, rear, left, and right sides of the crane frame 12 are overturned outward, and the leg posts 145, 147, 149 is held vertically. At the same time, the footboards 146, 148, 150 are positioned horizontally, the lower surfaces of the footboards 146, 148, 150 are brought into contact with the ground, and the footboards 146, 148, 15
The lower ends of the leg posts 145, 147, and 149 are brought into contact with the upper surface of the zero. Next, as shown in FIG. 5, the locking pin 96 is pulled out from the pin hole 95, and the telescopic leg 100 is expanded and contracted below the lower opening of the mast 92, and the locking pin 96 is aligned with the pin hole 95 and the upper pin hole 102. Insert 96 and fix. Then, the telescopic leg 100-
The ground plate 101-2 at the lower end of 2 contacts the ground E, and the mast 92 integrated with the telescopic leg 100-2 is supported by the ground E. Thus, the telescopic legs 100-2 and the leg posts 145, 147, and 149 project at the four corners of the boat trailer 10, and the frame-shaped crane frame portion 12 is not the trailer portion 11, but the telescopic legs 100-2 and the leg posts 145 and 145.
47 and 149. For this reason,
Even if a load is applied to the crane frame portion 12, the load is not transmitted to the trailer portion 11, and the crane frame portion 100-
2, will be maintained by the leg posts 145, 147, 149. This is to prevent the leaf springs 23 and 24 from being compressed by applying a load to the trailer unit 11 and to prevent the boat trailer 10 from tipping over due to a change in the position of the load.

Thus, the telescopic leg 100-2 and the leg support 1
When preparations for loading and unloading work and loading work are completed by the overhang of 45, 147, and 149, the boat A can then be suspended by the crane unit 13. That is, the rope 180 is attached to an appropriate portion of the boat A.
The hook 126 is hooked on the rope 180 and the winch 122 is operated. The winch 122 winds up the wire 123 by a built-in electric motor. When the wire 123 is wound up, the bottom of the boat A separates from the bottom pad 71, 72 and the arm 11
6 is hung from the tip. When the boat A is suspended in the air, the boat A or the arm 116 can be manually pushed to rotate the arm 116 and the mast cap 111 around the mast 92 because the boat A or the arm 116 can be moved by a relatively light force, as shown in FIG. The arm is turned 90 degrees backward from the position of the arm 116. Thus, FIG. 10 shows a state in which the boat A is suspended and the boat A is turned 90 degrees at the rear part of the boat trailer 10.

When the boat A is suspended from the tip of the arm 116 and located at the rear end of the boat trailer 10 as shown in FIG. 10, the wire 123 is fed out by reversing the winch 122 and the boat A is lowered. Let it. If the rear end of the boat trailer 10 is located, for example, at the end of a quay, a dike, or a revetment, the winch 122 is continuously rotated in reverse,
The boat A can be lowered to the sea surface or the water surface.
During the operation of suspending the boat A by the crane unit 13, since the automobile B is connected to the boat trailer 10 by the joint 32 and the trailer hitch 178, the boat A moves to the rear of the boat trailer 10. Even if the center of gravity moves, the load can be supported on the opposite side, thereby preventing the boat trailer 10 from falling over.

[0055]

Since the present invention is constructed as described above, the crane section is fixed to the corner of the boat trailer, the boat is lifted by the crane arm of the crane section, and the boat is suspended from the boat trailer. Can be dropped on the sea or water surface. Since the towing vehicle is connected to the boat trailer during the operation of suspending the boat, the load of the boat is supported by the weight of the vehicle to prevent the boat trailer from tipping over. For this reason, even in a place where a concrete wall is constructed vertically from the sea or water surface, such as a breakwater on the coast or a seawall of a river, the boat can be directly landed on the sea or water from the seawall or seawall. Can be done. As in the related art, it is not limited to dropping a boat to the sea surface or the water surface only at a gentle beach or a landing where the boat trailer can move from the road to the sea surface or the water surface. In any place, the boat can be loaded and unloaded from the boat trailer, and the range of use in which the boat can be used can be widened (claim 1).

This boat trailer with a crane function can be constructed by mounting a frame-shaped crane frame on the upper surface of a conventionally used boat trailer. No major remodeling or processing is required. A crane portion or the like can be fixed to the crane frame portion, and a function of suspension can be configured. Therefore, the trailer can be manufactured at a low cost without significantly changing the structure of the conventional trailer. Further, since the load on the crane portion is exerted by the crane frame portion, no stress acts on the trailer portion. For this reason, even if a heavy boat is suspended, the trailer does not deform or twist, and does not adversely affect the running in towing (claim 2).

An extendable leg is inserted into the crane from the lower opening of the mast, and the extendable leg can slide up and down and can be fixed at a predetermined position by a temporary fixing mechanism. For this reason, when moving the boat trailer, the telescopic legs are stored in the mast and held out of the way. When suspending the boat, extend the telescopic legs downward, and fix the mast and the telescopic legs with the lower ends of the telescopic legs grounded. The load of the suspended boat is supported by the mast and telescopic legs, and the load is not transmitted to the trailer or crane frame. Therefore, it is possible to prevent the boat trailer from tipping over and to prevent the trailer portion and the crane frame portion from being deformed.

A balance leg is attached to at least one portion of the side surface of the trailer, and a load generated when the trailer is suspended from the boat can be dispersed by the balance leg, thereby preventing the trailer from being deformed. In addition, placing the tires and heavy objects of the vehicle on the balance legs prevents the trailer from lifting up and prevents the trailer from falling over. Furthermore, since the balance legs can be inverted and stored on the upper surface of the trailer, they do not hinder the operation when moving (claim 4).

A balance leg is attached to at least one portion of the side surface of the crane frame, and the load generated when the boat is suspended from the boat can be dispersed by the balance leg, thereby preventing deformation of the crane frame. In. Also, placing the tires and heavy objects of the vehicle on the balance legs prevents the crane frame from lifting up, thereby preventing the boat trailer from tipping over. Further, since the balance legs can be inverted and stored on the upper surface of the crane frame portion, they do not hinder the operation of the boat trailer when it moves (claim 5).

The balance leg is composed of an elongated leg support and a flat tread plate. The upper portion of the leg support is connected to a trailer or a crane frame so that it can be turned upside down, and the tread plate can be inverted at the lower portion of the leg support. It is connected as follows. For this reason, when suspending the boat, fix the leg post downward from the trailer or crane frame, spread the tread on the bottom of the leg post and ground, and disperse the load from the trailer or crane frame. Can be. In addition, by placing a heavy object on the tread, the crane frame can be prevented from tipping over. further,
When the boat trailer is operated, the leg support can be inverted and positioned on the surface of the trailer or crane frame, and the tread can be inverted to be stored inside the trailer or crane frame. In such storage, the volume can be reduced, and does not hinder the operation of the boat trailer (claim 6).

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of a boat trailer with a crane function according to the present invention, in a state where a boat is mounted.

FIG. 2 is an exploded perspective view showing an embodiment of the boat trailer with a crane function of the present invention, showing two frames constituting the boat trailer.

FIG. 3 is a perspective view showing an embodiment of the boat trailer with a crane function of the present invention, in which various members attached to the crane frame are exploded.

FIG. 4 is a perspective view showing an embodiment of the boat trailer with a crane function of the present invention, in which a mechanism near a mast of a crane unit is exploded.

FIG. 5 is a cross-sectional view of the embodiment of the boat trailer with a crane function of the present invention, in which the base of the mast of the crane section is cut vertically.

FIG. 6 is an exploded perspective view showing an embodiment of a boat trailer with a crane function according to the present invention, and showing a mechanism of a crane arm portion for suspending the boat.

FIG. 7 is an exploded perspective view showing an embodiment of a boat trailer with a crane function of the present invention, showing the configuration of one balance leg.

FIG. 8 is an explanatory view showing an embodiment of a boat trailer with a crane function according to the present invention, showing a state where the balance legs are assembled and stored.

FIG. 9 is a perspective view showing an embodiment of a boat trailer with a crane function according to the present invention, which is connected to an automobile and each balance leg is overhanging in preparation for hanging the boat.

FIG. 10 is a side view showing an embodiment of the boat trailer with a crane function of the present invention, showing an operation of suspending the boat.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Boat trailer 11 Trailer part 12 Crane frame part 13 Crane part 27, 28 Tire 85, 86, 87 Balance leg 92 Mast 116 Arm 122 Winch 123 Wire 145, 147, 149 Leg support 136, 148, 150 Tread plate

Claims (6)

[Claims] 1. The tire is rotatably supported on the lower left and right sides,
In a boat trailer that transports a boat by placing a boat on the top surface and being pulled by a car, it is fixed to the corner of the trailer, and a crane part with an elongated mast standing upright and a top of the crane part mast A boat trailer with a crane mechanism characterized by comprising a crane arm portion which is rotatably mounted in a horizontal direction, extends its arm slightly in a horizontal direction, and has a wire hanging from a tip thereof hanging a boat. 2. The tire is rotatably supported on the lower left and right sides,
In a boat trailer where a boat is mounted on the upper surface and the boat is transported by being pulled by a car, this trailer has a trailer part supporting the tire at the bottom and a frame shape wider than the width of the side surface of the trailer part. It consists of a crane frame fixed to the upper surface of the trailer, fixed to the corners of the crane frame, and having a vertically elongated slender mast and a top of the crane mast. A boat trailer with a crane mechanism characterized by comprising a crane arm portion that is mounted rotatably in the horizontal direction, its arm extends slightly in the horizontal direction, and a wire that hangs the boat from its tip is hung. . 3. The mast of the crane part is hollow inside and has a lower end opening. An extendable leg is inserted from the lower end opening, and the extendable leg can be fixed to the mast at a free position by a temporary fixing mechanism. The boat trailer with a crane mechanism according to claim 1 or 2, wherein: 4. A balance leg at least at one side of the trailer which is stored on the upper surface of the trailer when not in use and which can be turned upside down to contact the ground. Boat trailer with crane mechanism. 5. A crane frame, wherein at least one side surface of the crane frame portion is provided with a balance leg which can be stored on the upper surface of the crane frame portion when not in use and which can be turned on and grounded on the ground. The boat trailer with a crane mechanism according to claim 2. 6. An elongated leg support having an upper side surface rotatably connected to a side surface of a trailer or a crane frame portion, and a flat plate-shaped rotatably connected to a lower portion of the leg support. It consists of a tread and a foot plate.When used, the tread is in contact with the ground, and the leg support is raised vertically downward. The boat trailer with a crane mechanism according to claim 4 or 5, wherein the boat trailer is inverted so as to be parallel to the boat.