JP2001294195A - Traction frame for traction of water ski by rope - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a traction frame which can be easily attached to/detached from a hull of a motorboat for traction of water skis even when the size or form of the hull is changed, and which can be easily installed ahead of the gravity center of the hull. SOLUTION: This frame for a traction rope for water skis comprises a pair of a right and a left side frame bodies 4 of which lower leg parts 15, 17 are fixed to boat sides 3 by fixing means 14, 16, and a lock part 22 provided roughly at a center part of an upper frame body 6 for connecting the side frame bodies 4 to each other for hooking a traction rope 20, and the side frame bodies 4 are connected to be slidable along the width of the hull on the upper frame body 6. The leg part 15, 17 is provided with a bearing metal fitting pivotally attached at a lower end of the leg part 15, 17, a tightening member pivotally attached in the middle of the leg part 15, 17 in which a hook metal fitting at a lower end is extended under the bearing metal fitting, and an adjusting member vertically movable along the tightening member to fix it in an adjusted state, where the bearing metal fitting and the hook metal fitting hold a flange of the boat side from above and under.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to water sports equipment. More specifically, the present invention relates to a tow base (tower) which is attached to a traveling power ship and is used for hanging and fixing a rope for towing a water ski such as a wakeboard.

[0002]

2. Description of the Related Art In recent years, water sports for towing water skis, including wakeboards, have become popular with running power boats, for example, motor boats and water motorbikes having jet propellers with built-in propellers. This sport is
A person rides on a single-leaf or double-leaf board (ski board) and travels on water with the tip of a tow rope attached to a traveling power boat. In order to be fixedly mounted on the power ship, a stand called a towing tower is mounted on the power ship. Because the tow rope is subjected to a large force while the power ship is running, the tow stand for securing the tow rope must be solid, and therefore large, to secure it securely to the hull of the power ship. In such a method, means such as directly fastening the hull and the tow base with bolts have been adopted. For this reason, it takes time to attach and detach the gantry to and from the hull, and it is difficult to respond to changes in the size and shape of the hull, and a dedicated towing gantry must be prepared for each hull. Also, once mounted, it was difficult to change the position. In particular, it was difficult to mount the tow stand in front of the center of gravity of the ship.

[0003]

SUMMARY OF THE INVENTION The present invention is mounted on a power ship (personal watercraft, abbreviated as PWC) for fixing a tow rope for towing such a conventional water ski. In view of the problem of the tow mount, an object of the present invention is to provide a tow mount that can be attached to and detached from the hull even if the size and shape of the hull change, and that can be easily attached to and detached from the hull. It is another object of the present invention to provide a tow base that can be easily mounted in front of the center of gravity of the ship.

[0004]

Means for Solving the Problems The gist of the present invention to solve the above-mentioned problem is that a pair of independently provided lower legs are fixed to the left and right hulls, and are erected above the hull. A tow for pulling a water ski with a rope, comprising: a side frame, a coupling member for connecting upper portions of the pair of side frames, and a locking portion for locking a tow rope in place. It is a mount.

Further, one of the pair of side frame members is connected to the other so as to be able to advance and retreat, and a tow base for towing a water ski with a rope, and the pair of side frame members. Is a tow stand for pulling a water ski with a rope, which is slidably connected to the connecting member in the width direction of the hull.

Further, the gist of the present invention is that the connecting member is constituted by a rod-shaped or cylindrical member, and the upper part of the pair of side frame members is provided with respect to the rod-shaped or cylindrical member of the connecting member. A tow stand for pulling a water ski with a rope, comprising a slidable tubular slider, the tubular slider having a fixture for fixing the tubular slider to the connecting member. . Further, a gist of the present invention is a tow stand for pulling a water ski with a rope, wherein the pair of side frame bodies each have two legs in the front-rear direction.

Further, the gist of the present invention is that
An upper part of the pair of side frames is a tow stand for pulling a water ski with a rope, the upper part being attached to the connecting member, and the connecting member is fixed to a hull and stands above the hull. A tow stand for pulling a water ski with a rope, which is connected to a central frame to be provided, and the coupling member is provided at a shaft attachment portion with an upper portion of the pair of side frame members. 1 is a tow stand for pulling a water ski with a rope, which is characterized by having a rod shape.

[0008] Further, the gist of the present invention is that the leg is pivotally attached to a lower end of the leg, and the leg is pivotally mounted in the middle of the leg. A clamping member extending downward from the fitting, and an adjusting member for moving the fastening member up and down and fixing the moving member in the up and down direction. A water ski, wherein the water ski is towed with ropes, wherein the tightening member includes an elastic member that is elastically deformed in the longitudinal direction. It is a towing stand that is towed with ropes.

The gist of the present invention is that the leg comprises a locking piece attached to a lower end and a vertically movable pressing member provided in the middle of the leg. And the lower end surface of the pressing member is pressed against the upper surface of a hull member such as a hull cover, and a part of the hull is sandwiched between the locking pieces and the pressing member so that the leg is fixed. A tow base for pulling the water ski with a rope, wherein the part is fixed to the hull, and a swing-down prone dish-like member is swingably attached to the lower end of the pressing member. This is a towing stand that pulls a water ski that is towed with a rope.

According to another aspect of the present invention, the leg includes a holding member pivotally attached to a lower end of the leg, the holding member having a hook at one end, and a pushing member at the other end. An adjusting portion for moving the pushing member up and down and fixing the advancing and retracting member in such a manner that the pushing member and the hook portion sandwich the flange of the hull from above and below by the adjusting portion. It is a towing stand that pulls the characteristic water ski with a rope.

[0011]

Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view (perspective view) mounted on a power ship (P / W / C) 1 on which a tow stand 2 of the present invention is mounted. In FIG. 1, the towing stand is composed of a pair of side frames (hereinafter, referred to as side frames) 4 and an upper frame (hereinafter, referred to as upper frames) 6. In FIG. 1, the upper frame is a coupling member that couples the pair of side frames.

The front leg 17 and the rear leg 1 of the side frame 4
5 are provided with fixtures 14 and 16 for fixing the respective tips to the hull 3 of the power boat 1. Also front leg 1
The horizontal shaft 12 connecting and fixing the rear leg 7 and the rear leg 15
A holding plate 30 serving as a cover-down member for holding the bow cover 7 of the power ship is attached via a pressing member 18 serving as a holding rod. In addition, the front leg 17 and the rear leg 15 of the side frame 4 constitute the leg of the towing stand 2.

At the upper ends of the front upper leg portion 33 and the rear upper leg portion 35 of the side frame 4, cylindrical sliders 24 and 26 are disposed, respectively. The upper frame 6 includes guide frames 28, 2
9, an upper side frame 32 and a center frame 34. The guide frames 28 and 29 are formed of rod-shaped or cylindrical members, and the cylindrical sliders 24 and 26 are slidably penetrated through the rod-shaped or cylindrical members of the guide frames 28 and 29, and , 26 are
Fixing bolts 44 and 46 are provided so as to be fixed to arbitrary positions of the guide frames 28 and 29, respectively. By fixing the cylindrical sliders 24, 26 to the guide frames 28, 29 by the fixing bolts 44, 46, the side frame 4 and the upper frame 6 are fixedly connected.

When the towing stand 2 is mounted on a ship having a different width, the sliders 24 and 26 are slid on guide frames 28 and 29, respectively, to change the distance between the pair of side frames 4. Thereby, the towing stand 2 can be attached to ships having different ship widths. Further, since the interval can be narrowed in front of the pair of side frames 4, the tow stand 2 can be easily attached at a position near the bow. That is, it is possible to easily mount the tow stand in front of the center of gravity of the ship. By mounting the tow stand in front of the center of gravity of the ship, the power boat traveling while pulling the water ski with a rope has a bow, that is, the angle between the power boat and the water surface increases, which allows the power boat to travel. The resulting waves increase. This big wave gives the water skiing a lively feeling and brings a variety of running figures.

The center frame 34 is provided with a locking member 22 serving as a locking portion for hooking the tow rope 20. The other end of the tow rope 20 is carried by the person on the board, and the tow rope 20 pulls the person on the board.

FIG. 2 shows the structure of a fixture 16 attached to the rear leg 15 of the side frame 4 and fixing the lower end of the rear leg 15 to the hull 3 of the power boat 1. In FIG.
The main components of the fixture 16 are a bar member 62 with a hook,
A rod-shaped member 58 and a receiving member 52; The hooked rod-shaped member 62 has a hook fitting 50 at one end and a connecting member 60 at the other end.
Is provided. The hooked rod 62 is connected to the connecting member 60.
And is fixedly connected to the rod-shaped member 58 at a fixed position variably. That is, one portion of the rod-shaped member 58 (FIG. 2)
In this case, the distance L between the connecting portion 56 between the bar-shaped member 58 and the rear leg 15) and one portion of the bar-shaped member 62 with a hook (the hook 50 at the end of the bar-shaped member 62 with a hook in FIG. 2) is variable. It is. The connecting member 60 has a U-shaped cross section, and the one side 7
0 is welded and fixed to one end 71 of the bar member 62 with a hook,
The other side 72 is connected to one end 74 of the rod 58. One end 74 of the rod-shaped member 58 is a male screw 76, and a through hole 65 provided in the side 72 of the connecting member 60.
Penetrates. The male screw 76 has a side portion 7 of the connecting member 60.
2, the nut 64 and the nut 66 are mounted, and the distance L is changed by changing the position of the nut 64 and the nut 66. The nut 64 and the nut 66 fasten the connecting member 60. And the rod-shaped member 58 can be connected and fixed.

That is, the fastening member 63 is constituted by arranging the bar member 62 with hooks, the connecting member 60 and the bar member 58 in the above-described manner. Further, an adjusting member 67 is constituted by a part of the connecting member 60, the male screw 76, the nut 64, and the nut 66. The adjusting member 67 moves the hooked bar-shaped member 62, that is, the hook metal member 50 up and down in the vertical direction, and fixes it in the state of being moved forward and backward.

On the other hand, the lower end 55 of the rear leg 15 is
3, and the support member 54 is fixed to the receiving member 52 having an L-shaped cross section. The receiving member 53 includes a supporting member 54 and a receiving member 52. At the position of the connecting portion 56 in the middle of the leg of the rear leg 15, the rod-shaped member 58 and the rear leg 1 are positioned.
5 is attached to the shaft.

At the L-shaped valley portion of the receiving member 52, the hull 3
(The cross section is shown in FIG. 2). The tip 80 of the hook of the bar member 62 with a hook is bent back into a U-shape of the hull 3 (the cross section is shown in FIG. 2). And the nut 64 and the nut 66 are tightened so as to minimize the distance L, and the connecting member 60 and the rod-shaped member 58 are connected and fixed. Thus, the rear leg 15 can be fixed to the hull 3.

Further, the bar-shaped member 58 and the bar-shaped member 62 with a hook are provided.
An embodiment is possible in which an elastic member such as a spring body is disposed on the second member, and the bar-shaped member 58 and the bar-shaped member 62 with hooks are elastically deformed in the longitudinal direction. Thereby, the engagement can be made more reliable against vibration and the like. Connecting member 6
A similar effect can be obtained by disposing a spring body at zero. A spring member is disposed on the supporting member 54 and the receiving member 52 or the supporting member 5
An embodiment is possible in which an elastic body is disposed on the fourth member 4 and the receiving member 52 so as to be elastically deformed. This also makes the engagement more reliable against vibrations and the like.

FIG. 3 shows a structure of a fixture 14 attached to the front leg 17 of the side frame 4 and fixing the tip of the front leg 17 to the rim 3 of the power boat 1. In FIG.
The main components of the fixture 14 are a bolt 94 and a locking piece 9.
0. The locking piece 90 has an L shape, one of which has a hook-like plate or rod shape, and the other has a plate shape. Is attached. A screw hole 96 for a bolt is provided at the lower end of the front leg 17 in the axial direction of the front leg 17, and the locking piece 90 is fastened to the front leg 17 by screwing the bolt 94 into the screw hole 96. The distance LH between the front leg 17 and the hook 91 of the locking piece 90 can be changed by moving the locking piece 90 along the through-hole 92.

The front leg 17 of the side frame 4 is
The pressing member 18 is attached to the horizontal shaft 12 connected to the front leg portion 17 with its axis substantially vertically downward with respect to the horizontal shaft 12. At the lower end of the pressing member 18, a holding plate 30, which is a cover-shaped member for holding the bow cover 7, is attached so as to swing freely. The horizontal shaft 12 has a through hole 106 through which the rod pressing member 18 is inserted. The upper part of the pressing member 18 is provided with a male screw, and the pressing member 18 inserted into the through hole 106 is fixed at a predetermined position by nuts 102 and 104.

The hook portion 91 of the locking piece 90 is hooked and engaged with a rim 83 (a cross section is shown in FIG. 3) of the hull 3 bent back into a U-shape, and the pressing member 18 is pushed to the limit. By pressing downward, that is, increasing the distance LC between the bow cover 7 and the horizontal shaft 12, a part of the hull including the hull engaged by the locking pieces 90 is clamped, and the front leg of the side frame 4 is held. 17 can be fixed to the hull.

Further, a mode is possible in which a spring body is disposed on the pressing member 18 so that the pressing member 18 is a member that elastically deforms in the axial direction. Thereby, the engagement can be made more reliable against vibration and the like. The same effect can be obtained by disposing a spring body on the holding plate 30. The same effect can be obtained even if the holding plate 30 itself is made of a material that elastically deforms, such as rubber.

The horizontal shaft 12 is provided with a plurality of through holes 106 through which the pressing member 18 is inserted, and the position of the pressing member 18 can be optimally set according to the size and shape of the hull.

Even when the bow cover is not provided and other members or the bottom of the ship are exposed, the long pressing member 18 can be used to press the other members or the bottom of the ship with the holding plate 30 so that the side of the ship can be side-mounted. The front legs 17 of the frame 4 can be fixed to the hull.

The fixing device 14 shown in FIG. 3 can be suitably fixed even if the shape of the bow changes. That is, in FIG. 13, the hull 1 in FIG.
The angle α1 near the bow of the rim 252a of FIG.
Even if the angle is changed to α2 as shown in 3-b, the locking piece 90 that engages with the hull is connected to the surface 254 of the hook 91 at the tip thereof and
a or the direction of the hull 252b can be adjusted in parallel. This adjustment is made by the front leg 1 of the side frame.
Locking piece 90 fastened to the lower end of 7 by bolts 94
Of the hook 91 and the hull 2 by rotating the bolt 94 by a predetermined angle around the bolt 94.
This can be performed by setting the position of the locking piece 90 so that the direction of the locking portion of the boat 52a or the hull 252b is parallel. The bolt 94 and the hook 91
The distance from the surface 254 (corresponding to LH in FIG. 3) can also be changed and adjusted as described above. After such adjustment, the bolt 94 is tightened to complete the engagement.

FIG. 4 shows a mode of connection between the upper frame 6 which is connected to the side frame 4 at the uppermost portion of the towing frame 2 and forms a framework structure of the towing frame 2, and the side frame 4. In FIG. 4, the upper frame 6 includes rod-shaped or cylindrical guide frames 28 and 29, and upper side frames 32,
A frame is formed from the central frame 34. The guide frames 28 and 29 are slidably penetrated with the cylindrical sliders 24 and 26 provided at the uppermost part of the side frame 4 respectively. The cylindrical sliders 24 and 26 are attached to the side frame 4
Are connected to the front upper leg 33 and the rear upper leg 35, respectively. The cylindrical sliders 24 and 26 are provided with fixing bolts 44 and 46, respectively, so as to be fixed at arbitrary positions on the guide frames 28 and 29, respectively. By fixing the cylindrical sliders 24, 26 to the guide frames 28, 29 with the fixing bolts 44, 46, the side frame 4 and the upper frame 6 are connected and fixed. Slide and move the cylindrical sliders 24 and 26 on the guide frames 28 and 29, respectively.
By changing the distance between the pair of side frames 4, the tow gantry 2 can be attached to ships having different ship widths. The locking member 22 for hanging the tow rope 20 is attached to the central frame 34.

In the present invention, as means for connecting the side frame 4 to the upper frame 6, cylindrical sliders 24, 2
6 is slidably penetrated through the guide frames 28 and 29, and instead of the cylindrical sliders 24 and 26, rod-shaped or protruding sliders slide along the guide grooves provided in the guide frames 28 and 29. The configuration may be as follows.

FIG. 5 shows the structure of a locking portion for hanging and locking the tow rope 20. In FIG. 5-a, the guide frame 2
The metal locking member 22 composed of a flanged projection member is attached to a central frame 34 connected to the center frame 9.
The loop 21 of the tow rope 20 is hung on the narrow portion of the flanged projection member. As shown in FIG. 5B, the locking member 23 may be a hook-shaped metal member.

In another embodiment of the present invention, in which the legs of the tow stand are connected to the hull, as shown in FIG. 6, a holding member 111 is attached to the lower end of the leg 110 of the tow stand.
It is also possible to adopt a configuration in which the hull 3 is pinched by the pinching members 111 and the hull 3 is pinched. In FIG. 6, a hook 118 is provided at one end.
The other end 119 of the fixing member 114 having the
Is provided, and the bolt member 120 is screwed into the screw hole 122.
A screwing knob 124 is provided at one end of the bolt member 120, and an L-shaped pressing member 116 is provided at the other end thereof.
It is mounted so that it can rotate and swing freely. With the hull 3 sandwiched between the pushing member 116 and the hook portion 118, the knob 124
Is turned to advance the bolt member 120 in the direction of pressing the hull 3 so that the hull 3 is firmly held.

In the present invention, other modes for changing the distance between the side frames are possible. 7, the guide frame 128 constituting the upper frame 6a includes frame members 150 and 151. Guide frame 129
Is composed of frame members 152 and 153. Cylinders 141 and 142 are attached to one ends of the frame members 150 and 152, respectively. Frame members 151, 15
3 are inserted into the cylinders 141 and 142, respectively, and fixed at predetermined positions by fixing bolts 144 and 146. Side frame (side frame) 4a
Are fixed to the frame members 152 and 153, respectively, and the rear upper leg 35a is
151 respectively. With such a configuration, the frame members 151 and 153 are
The distance between the side frame members is changed by sliding to a predetermined position while being inserted into 41 and 142. That is,
By changing the length LA, the distance between the side frames is changed.

As a mode in which the distance between the side frame members is variable, one end of each of frame members 150a and 151a is inserted into the cylindrical member 163 from the right and left as shown in FIG. May be respectively fixed by the fixing bolts 161 at the position. Also, as shown in FIG. 8B, the frame members 152b and 150b are provided with a forward screw hole 162 and a reverse screw hole 160 at one end, and a bolt 165 obtained by cutting the forward screw 154 and the reverse screw 156 into the left and right is screwed into the frame. By connecting the members 152b and 150b and rotating the knob 168, the distance between the side frames can be changed.

A plurality of types of upper frames having different sizes can be prepared in advance, and the side frames can be mounted on an upper frame suitable for the width of the hull. In FIG. 9, the upper frame 6b includes a central frame 34b and a front arm 184 and a rear arm 182 disposed on the left and right sides thereof. The front arm 184 and the rear arm 182 each have a screw hole 172 at one end. Is provided. A bolt 174 is screwed into the screw hole 172. A tubular member 180 is attached to an end of the front upper leg 33b and the rear upper leg 35b of the side frame (side frame) 4b. A bolt 174 is inserted through the cylindrical member 180, and the knob 176 is turned to fasten the cylindrical member 180 sandwiched between the front arm 184 and the rear arm with the knob 176. The bolt 174 can be loosened and removed, and the upper frame can be replaced with another one of a different size (such as one with a different L1 and L2). This changes the distance between the side frames.

FIG. 1 shows another embodiment of changing the distance between the side frames.
0 is shown. In FIG. 10, the guide frames 128c and 129c of the upper frame 6c have a plurality of through holes 196. Front upper leg 3 of side frame (side frame) 4c
3c and the rear upper leg 35c have a threaded rod 192 fixed to each end thereof. A threaded rod 192 is inserted through the through hole 196 and can be fastened and fixed to the guide frame by a nut 194. By selecting the through hole 196, an appropriate distance between the side frames can be obtained.

FIG. 11 shows still another embodiment in which the distance between the side frames is changed. In FIG. 11, the side frame includes a bending rod 250, a fixture 16d provided at one end thereof, and a cylindrical slider 248 fixed at the other end. In addition, the upper frame 6d includes guide frames 128d and 129d,
The center frame 34d and the guide frame 1 connecting them
And a pole 240 substantially vertically built from the center of 28d. A locking member 22d is attached to the upper end of the pole 240. A tubular slider 248 penetrates the guide frame 128d, and the tubular slider 248 slides along the guide frame 128d, and is fixed at an appropriate position according to the width of the hull 1 by a fixing bolt. The cross-sectional shapes of the slide holes of the cylindrical slider 248 and the guide frame 128d are square, and hinder the rotation of the guide frame 128d.

FIG. 12 shows another embodiment for adjusting the position of the fixtures arranged on the side frame and holding the hull to the width of the hull. In FIG. 12, the towing stand 2e is provided with a central frame 202.
And a pair of side frames 4 attached to the center frame 202.
e. One end of the center frame 202 is attached to the bow fixture 221 via a tubular member 228 so as to be vertically slidable. Further, it can be fixed at a predetermined position by the fixing bolt 230. The bow fixture 221 includes a hook member 220 that engages with the rim 3, a pressing member 18 e that presses the bow cover 7, and a holding plate 30 e disposed at the tip of the pressing member 18 e. The engagement of the hook member 220 is strengthened by pressing the bow cover 7 with the pressing member 18e.
The engagement relationship between the hook member 220 and the hull 3 is shown in FIGS.
The adjustment can be performed by the same mechanism as the embodiment shown in FIG.

At the lower end of the side frame 4e, a fixture 16e as shown in FIG. 2 is arranged. Bow fixture 221
And the pair of fixtures 16e of the side frame 4e sandwich the hull 3 respectively, so that the tow stand 2e is fixed to the hull. In addition, since the angle formed by the two side frames 4e is changed by the rotation of the side frames 4e at the shaft attachment portion, the fixing tool 16e is adjusted to the width of the hull and the hull 3
Can be easily engaged with the left and right.

The upper end of the central frame 202 has a locking member 2
2e is attached via a tubular member 210 so as to be slidable up and down. Further, it can be fixed at a predetermined height position by the fixing bolt 212.

[0040]

The tow frame obtained by the present invention can easily move and fix the members constituting the frame of the tow frame, so that it can be mounted on the hull even if the size or shape of the hull changes. This is a towing stand that can be mounted firmly and can be easily attached and detached. In addition, the towing tower obtained according to the present invention makes it possible to easily mount the towing frame even ahead of the center of gravity of the power boat that pulls the water ski with a rope.

[Brief description of the drawings]

FIG. 1 is a perspective view of a hull equipped with a tow stand according to the present invention.

FIG. 2 is a perspective view showing a configuration of a fixture for fixing a side frame (side frame) of the tow stand of the present invention to a hull of a ship.

FIG. 3 shows a configuration of another fixing device for fixing a side frame (side frame) of the tow gantry of the present invention to a hull of a ship.
It is a sketch drawing which shows the aspect which fixes a side frame (side frame) to the hull of a ship.

FIG. 4 is a plan view showing a mode of connection between an upper frame (upper frame) and a side frame (side frame) constituting a frame structure of the towing stand of the present invention.

FIG. 5 is a perspective view showing an engagement portion for hanging a tow rope on a tow base of the present invention, wherein (a) and (b) show different embodiments.

FIG. 6 shows the structure of another fixing device for fixing the side frame (side frame) of the tow stand of the present invention to the hull of a ship.
It is a sketch drawing which shows the aspect which fixes a side frame (side frame) to the hull of a ship.

FIG. 7 is a perspective view showing another mode of connection between an upper frame (upper frame) and a side frame (side frame) constituting a frame structure of the tow stand according to the present invention.

FIG. 8 is a schematic sectional view showing a mode of connection of a side frame (side frame) constituting a frame structure of the tow stand according to the present invention.

FIG. 9 is a sketch drawing showing another mode of connection between an upper frame (upper frame) and a side frame (side frame) constituting the framework structure of the towing stand of the present invention.

FIG. 10 is an upper frame (upper frame) and a side frame (side frame) constituting the frame structure of the towing stand of the present invention.
It is a sketch drawing which shows the other aspect of connection with.

FIG. 11 is a sketch drawing in which the tow gantry of the present invention is mounted on a hull.

FIG. 12 is a sketch drawing in which the tow stand of the present invention is mounted on a hull.

FIG. 13 is a plan view in which the fixture of FIG. 3 of the tow stand of the present invention is mounted on a hull having different angles of the edges of the bow.

[Explanation of symbols]

1, 1a; power boat 2, 2d, 2e; towing frame 3; hull 4, 4a, 4b, 4c, 4e; side frame (side frame) 6; upper frame (upper frame) 7; bow cover 8; Side frame upper frame member 12; lateral shaft 14; fixing device 15; rear leg portion 16; fixing device 17; front leg portion 18; pressing member 20; traction rope 21; loops 22, 23; locking member 24; 26; tubular sliders 28, 29; guide frame 30; holding plate 32; upper side frame 34; central frame 33; front upper leg 35; rear upper leg 44, 46; fixing bolt 50; hook fitting 52; Member 53; metal fitting 54; support member 55; lower end 56; connecting portion 58; rod-shaped member 60; connecting member 63; fastening member 64, 66; nut 65; through hole 67; adjusting member 70; 71; one end of the bar-shaped member with hooks 72; another side portion of the bar-shaped member with hooks 74; one end portion of the bar-shaped member 76; male screw 80; tip of hook 83; edge 90; locking piece 91; hook portion 92; Long hole 94; Bolt 96; Screw hole 100, 102, 104; Nut 106; Through hole 111; Nipping member 112; Shaft attaching portion 114; Fixing member 116; Push member 118; Hook 119; Other end 120; 122; screw holes 124; knobs 128, 129; guide frames 141, 142; cylinders 144, 146, 161; fixing bolts 150, 151, 152, 153, 150a, 150
b, 151a, 152b; frame member 154; forward screw 156; reverse screw 160; reverse screw hole 162; forward screw hole 163, 180; cylindrical member 165, 174; Arm 184; Front arm 192; Threaded rod 196; Through hole 202; Central frame 210, 228; Tubular member 212, 230; Fixing bolt 220; Hook member 221; Bow fixture 240; Pole 248; Slider 250; bending rod 252; surface of hook portion 252a, 252b;

Claims (13)

[Claims] 1. A pair of independently provided lower leg portions fixed to the left and right hulls and a pair of side frame members erected above the hull, and a connecting member for connecting the upper portions of the pair of side frame members. And a locking portion for locking a tow rope in place. A tow stand for towing a water ski with a rope. 2. The tow stand according to claim 1, wherein one of the pair of side frames is connected to the other so as to be able to advance and retreat. 3. The water ski according to claim 1, wherein the pair of side frames are slidably connected on the connecting member in a width direction of the hull. A towing platform for towing. 4. The connecting member is formed of a rod-shaped or cylindrical member, and a cylindrical slider slidable on the rod-shaped or cylindrical member of the connecting member is provided above the pair of side frame members. The tow rack according to claim 3, wherein the tubular slider is provided with a fixture for fixing the tubular slider to the coupling member. 5. The tow stand according to claim 1, wherein each of the pair of side frames has two legs in the front-rear direction. 6. The tow stand according to claim 1, wherein upper portions of the pair of side frame members are pivotally attached to the coupling member. 7. The tow stand according to claim 6, wherein the connecting member is fixed to a hull and connected to a central frame that stands upright above the hull. 8. The traction apparatus according to claim 7, wherein the coupling member has a rod shape at a portion where the coupling member is attached to an upper portion of the pair of side frame bodies. Mount. 9. The leg has a receiving member pivotally attached to the lower end of the leg, a fastening member pivotally attached to the middle of the leg, and a hook at the lower end extending downward from the receiving member. An adjusting member for moving the tightening member up and down in the vertical direction and fixing the advancing and retracting member, wherein the adjusting member causes the receiving member and the hook to clamp the flange on the hull from above and below. A tow stand for pulling the water ski according to any one of claims 1 to 8 with a rope. 10. The apparatus according to claim 9, wherein the fastening member includes an elastic member elastically deformed in a longitudinal direction.
A tow stand for towing the water ski described in 1 above with a rope. 11. The leg comprises a locking piece attached to a lower end thereof and a vertically movable pressing member provided in the middle of the leg, and locks the locking piece to a lower surface of a flange on a hull. In addition, the lower end surface of the pressing member is pressed against the upper surface of the hull member such as the cover of the hull, and a part of the hull is held between the locking piece and the pressing member, and the leg is fixed to the hull. A tow base for towing the water ski according to any one of claims 1 to 8 with a rope. 12. The tow stand according to claim 11, wherein a swing-down dish-like member is swingably attached to a lower end of the pressing member. 13. The leg includes a holding member pivotally attached to a lower end of the leg, the holding member includes a hook at one end, and a pressing member at the other end, and the pressing member is vertically moved. 9. An adjusting part for moving forward and backward and fixing in a state of being moved forward and backward, wherein said pushing part and said hook part sandwich a flange of a hull from above and below by the adjusting part. A tow stand for towing the water ski described in any of the above with a rope.