JP4916944B2 - Mooring equipment - Google Patents

Description

  The present invention relates to a mooring device for mooring a floating body that floats on the surface of a water area where the water level varies.

  Conventionally, floating bodies are floated on the surface of the water and used as landmarks such as lamp buoys and off-limit signs. The floating body is moored by a mooring device, and the range in which the floating surface can be moved is restricted to a preset swinging range. A conventional mooring device includes a sinker set on the bottom of the water and a mooring line having one end connected to the sinker and the other end connected to a floating body.

  If the water area where the floating body floats is a water area where the water level changes greatly due to tides etc., the distance between the sinking weight of the mooring means and the light buoy becomes shorter at low water levels, the mooring line relaxes, and the floating body can move The swing range, which is a large range, becomes larger than that at high water level. Therefore, when the floating body is used as a mark for prohibition of entry, the restricted area is expanded when the water level is low.

  As described above, when mooring a floating body in such a water area, it is necessary to consider that the swinging range is expanded at a low water level. Conventionally, the swinging range is restricted by increasing the number of mooring points of the floating body using a plurality of weight sinks and mooring lines.

  In addition, Patent Document 1 discloses a mooring device for the purpose of preventing an expansion of a swinging range at low water. In the mooring device disclosed in Patent Document 1, a hollow column having an upper end is erected on a weight sinked to the bottom of the water, and a heavy column is inserted into the hollow column so as to be movable up and down. And the light buoy are connected to each other by a mooring line, and the length of the mooring line extending from the hollow column body is expanded and contracted according to the fluctuation according to the water level of the light buoy. The purpose is to prevent the swaying range of the light buoy at that time from being expanded compared to when the water level is high.

Japanese Patent Laid-Open No. 7-81669

  However, when the number of mooring points of the floating body is increased, the swinging range of the floating body can be suppressed to some extent, but the swinging itself cannot be eliminated. In addition, the increase in mooring points increases the amount of underwater work such as the installation of weights, which complicates the construction and leads to an increase in cost.

  The present invention has been made in view of these problems, and an object of the present invention is to provide a mooring device that can be movably moved up and down following fluctuations in the water level without swinging the floating body.

The mooring device according to the first aspect of the present invention that solves the above-described problem is a base attached to a floating body that floats on the water surface, a first pulley that is rotatably supported by the base, a sinking weight that is set on the bottom of the water, A counterweight having a size that can be moved up and down between the sinker and the floating body, a second pulley provided on the counterweight and rotatably supported, and one end of the sinker Coupled, extending upward from the sink to the first pulley, strung over the first pulley, extending downward from the first pulley to the second pulley, strung over the second pulley A mooring line extending upward from the second pulley to the base and having the other end coupled to the base , the mooring line being a length portion from the sinking weight to the preset minimum water level. The non-spreading that is not hit by the first pulley and the second pulley The hook portion is constituted by a resin rope, and is a length portion extending from the lowest water level to the base, and the hook portion that may be hung on the first pulley and the second pulley is constituted by a wire rope, The weight per unit length of the rope is lighter than the weight per unit length of the wire rope .

  According to a second aspect of the present invention, in the mooring device according to the first aspect, the mooring line has a non-hung portion, which is a length portion from the weight sink to the preset minimum water level, formed of a resin rope. The hooking portion, which is the length portion from the lowest water level to the substrate, is constituted by a wire rope, and the weight per unit length of the resin rope is lighter than the weight per unit length of the wire rope. Features.

  According to the first aspect of the present invention, the tension between the second pulley and the first pulley of the mooring line is given downward tension by the counterweight, and the first pulley of the mooring line and The tension | tensile_strength which pulls a mooring line upwards is provided to the part between sink weights. Therefore, the floating body is pulled toward the sink weight and is anchored at a position above the sink weight.

  When the water level fluctuates between the highest water level and the lowest water level and the floating body moves up and down according to the water level, the counterweight is moved up and down according to the vertical movement of the floating body. The tension between the first pulley of the mooring cable and the weight is not affected by the water level, and a tension that always pulls the mooring cable upward with a constant force acts. The portion between the first pulley and the weight is pulled toward the weight and moored at a position above the weight.

  Therefore, it is possible to prevent the mooring line from relaxing according to the fluctuation of the water level, and to eliminate the swinging of the floating body due to the relaxation of the mooring line. In addition, since the swinging of the floating body can be eliminated without providing a plurality of mooring lines as in the prior art, the number of parts can be reduced, the installation work can be simplified, and the cost can be reduced.

In particular, in the mooring line, a non-hanging portion that is a length portion from the sinking weight to a preset minimum water level is formed by a resin rope, and a hooking portion that is a length portion extending from the lowest water level to the base is provided. Since the weight per unit length of the resin rope is lighter than the weight per unit length of the wire rope, the required weight of the counterweight can be reduced. By reducing the weight of the counterweight, it is possible to reduce material costs and facilitate installation work. Moreover, durability of a mooring line can be improved by comprising the hooking part hooked on a 2nd pulley with a wire rope.

  Next, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is an overall view for explaining a mooring apparatus according to an embodiment of the present invention. The water surface WL shown in FIG. 1 is a water surface of a water area where the water level fluctuates, such as a reservoir of a hydroelectric power plant, for example, and a buoy float (floating body) F is floated.

  The mooring device 1 is for mooring the buoy float F floating on the water surface in such a water area, and includes a weight 2, a base body 3, a first pulley 4, a counterweight 5, a second pulley 6, and a mooring line 7. Yes.

  The sinking weight 2 is a weight set on the bottom of the water, and is constituted by a heavy object having a weight that is difficult to move on the bottom of the water. In this Embodiment, it is a rectangular parallelepiped shape of 1.1 meter x 1.1 meter x 0.9 meter, and is comprised by the concrete block which a weight in water consists of about 1.5 tons. A U-shaped coupling portion (not shown) is provided on the upper part of the sink weight 2, and has a configuration in which one end of the mooring line 7 can be coupled.

  The base 3 is constituted by assembling a steel material having a U-shaped cross section into a frame shape having a substantially rectangular shape in plan view. The base body 3 is attached to the upper part of the buoy float F and extends horizontally on the water surface. The buoy float F is formed of urethane resin for the outer skin and foamed polystyrene for the inside, and extends along the frame shape of the base body 3 so as to open the central portion of the base body 4 up and down.

  A first pulley 4 is rotatably supported at a substantially central position of the base 3. The first pulley 4 has a diameter of φ150 mm, and the axis of rotation extends horizontally along the upper surface of the base body by a bearing portion (not shown) provided on the base body 3. To be supported.

  Further, the base 3 is provided with a wire fixing portion 8 for connecting the other end of the mooring line 7. The wire fixing portion 8 is provided at a position separated from the bearing portion of the first pulley 4 by a predetermined distance in the radial direction of the first pulley 4, and has a configuration in which the other end of the mooring line 7 can be coupled. .

  Furthermore, the base 3 is provided with an upper limit stopper 9 for the counterweight 5. The upper limit stopper 9 has a cylindrical shape having an inner diameter that allows the second pulley 6 to enter the inner hole and rejects entry of the counterweight 5 into the inner hole. 4 is protruded downward from the base 3 at a position between the support portion 4 and the wire fixing portion 8.

  The counter weight 5 applies a certain tension to the mooring line 7, has a weight that sinks in water, and has a size that can move up and down between the weight 2 and the buoy float F. . In the present embodiment, it is formed of a steel material having a short axis columnar shape with a diameter of 450 mm and an axial length of 100 mm, and a weight in water of about 100 kg.

  The second pulley 6 is rotatably supported on the upper part of the counterweight 5. Like the first pulley 4, the second pulley 6 has a diameter of φ150 mm, and the rotation center axis of the counterweight 5 is between a pair of legs 5 a erected on the upper surface of the counterweight 5. It is supported so as to extend in parallel along the upper surface.

  The mooring line 7 is coupled at one end to the sink weight 2, extends upward from the sink weight 2 to the first pulley 4, is hung on the first pulley 4, and moves downward from the first pulley 4. The second pulley 6 extends to the second pulley 6, extends upward from the second pulley 6 to the base 3, and the other end is coupled to the wire fixing portion 8 of the base 3.

  As shown by a virtual line in FIG. 1, the length of the mooring line 7 is such that the counterweight 5 does not come into contact with the sink weight 2 at the preset minimum water level WL1, and the counterweight at the preset maximum water level WL2. 5 is set to a length that contacts the lower end of the upper limit stopper 9.

  In the present embodiment, the lowest water level WL1 is set to a height of about 15 meters from the bottom of the water, and the lowest water level WL1 to the highest water level WL2 is set to a height of about 15 meters.

  The mooring line 7 has a length portion from the sink weight 2 to the lowest water level WL1, in other words, a non-hung portion 7a (shown by a thick line in FIG. 1) that is not hung on the first pulley 4 and the second pulley 6. The resin rope has corrosion resistance.

  A length portion extending from the lowest water level to the wire fixing portion 8 of the base body 3, in other words, a hooking portion 7b (shown by a thin line in FIG. 1) that may be hooked on the first pulley 4 and the second pulley 6. It is composed of a wire rope.

  In this embodiment, a φ14 mm nylon rope is used as the resin rope, and a φ8 mm stainless wire rope is used as the wire rope. The resin rope is lighter in weight per unit length than the wire rope. Thus, the required weight of the counterweight 5 can be made small by comprising the non-hanging part 7a with the resin rope lighter than a wire rope. By reducing the weight of the counterweight 5, the material cost can be reduced and the installation work can be facilitated. Moreover, the durability of the mooring line 7 as a whole can be improved by configuring the hooking portion 7b hooked on the second pulley 6 with a wire rope that is more durable than the resin rope.

  According to the mooring device 1 having the above-described structure, as shown in FIG. 1, in the state where the buoy float F is floated on the water surface, the mooring line 7 has a portion between the second pulley 6 and the first pulley 4. The counterweight 5 gives a tension for pulling the mooring line 7 downward, and the tension between the first pulley 4 and the weight 2 of the mooring line 7 pulls the mooring line 7 upward. Is granted. Therefore, the buoy float F is pulled toward the sink weight 2 and is moored at a position above the sink weight 2.

  When the water level fluctuates between the highest water level WL2 and the lowest water level WL1 and the buoy float F moves up and down according to the water level, the counterweight 5 is moved up and down according to the up and down movement of the buoy float F. The

  For example, when the buoy float F moves upward due to the rise of the water level, the length of the portion between the sinking weight 2 of the mooring line 7 and the first pulley 4 becomes longer, and the first pulley of the mooring line 7 is correspondingly increased. The length of the part between 4 and the wire fixing part 8 becomes short, the 2nd pulley 6 is moved upwards, and the counterweight 5 is moved upwards.

  On the other hand, when the buoy float F moves downward due to the lowering of the water level, the length of the portion between the weight 2 of the mooring line 7 and the first pulley 4 is shortened, and the first pulley of the mooring line 7 is correspondingly reduced. The length of the part between 4 and the wire fixing part 8 becomes long, the 2nd pulley 6 is moved below, and the counterweight 5 is moved below.

  Therefore, the tension between the first pulley 4 and the weight 2 of the mooring line 7 is not affected by the water level, and the tension that always pulls the mooring line 7 upward with a constant force acts. The float F is pulled toward the sink weight 2 by the portion of the mooring line 7 between the first pulley 4 and the sink weight 2 and is moored at a position above the sink weight 2. Thereby, it is possible to prevent the mooring line 7 from being relaxed, and to eliminate the whirling of the buoy float F caused by the relaxation of the mooring line 7.

  And since the swing of the buoy float F can be eliminated without providing a plurality of mooring lines as in the prior art, the number of parts can be reduced and the installation work can be simplified, and the cost can be reduced. .

  Further, according to the mooring device 1 having the above configuration, the upper limit stopper 9 of the counterweight 5 is provided, so that an external force greater than the load of the counterweight is applied to the mooring device due to exceptional strong wind or water increase caused by typhoon or heavy rain. Even when the mooring device is caused to flow, the mooring device will not move further than the length up to the preset maximum water level. Therefore, it is not necessary to separately provide a limiting wire or the like that limits the moving range of the mooring device.

  In addition, this invention is not limited to the above-mentioned embodiment, A various change is possible in the range which does not deviate from the meaning of this invention. For example, in the above-described embodiment, the mooring line has been described as an example of a resin rope and a wire rope. However, the mooring line may be configured only by a wire rope. By constructing the mooring line 7 only with a wire rope, the tensile strength can be improved.

It is a general view for demonstrating the mooring apparatus in embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Mooring apparatus 2 Weight sink 3 Base body 4 1st pulley 5 Counterweight 6 2nd pulley 7 Mooring line 8 Wire fixing part 9 Upper limit stopper F Buoy float (floating body)

Claims (1)

A substrate attached to a floating body floating on the water surface;
A first pulley rotatably supported by the base body;
A sinker set on the bottom of the water;
A counterweight having a weight that sinks in water, and having a size capable of moving up and down between the weight and the floating body;
A second pulley provided on the counterweight and rotatably supported;
One end is coupled to the weight, extends upward from the weight to the first pulley, and is hung on the first pulley and extends downward from the first pulley to the second pulley. A mooring line that is strung over the second pulley, extends upward from the second pulley to the base, and has the other end coupled to the base ;
The mooring line is
A length portion from the weight sink to a preset minimum water level, and a non-hung portion that is not hooked on the first pulley and the second pulley is constituted by a resin rope, and from the minimum water level A length portion extending to the base body, and a hook portion that may be hooked on the first pulley and the second pulley is constituted by a wire rope, and a weight per unit length of the resin rope is A mooring device characterized by being lighter than the weight per unit length of the wire rope .

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