JP2004100169A - Netting location - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To facilitate removal of refuse floating on floats in a netting location. <P>SOLUTION: In a netting location 10 where a netting body 20 connected to a plurality of floats 30 is set afloat on water surface 61, a lifting means 50 stretched between two ends of a netting body 20 between a pair of posts 41, 42 to lift and lower one end of the body 20. A pulley 54 is mounted to one end of the netting body 20 in the lifting means 50, a winch side rope 52 is hung over the pulley 54. One end side of the winch side rope 52 is made possible to wind up/off by the winch 51 and a ring shaped part 53 is formed at the other end part of the winch side rope 52. A balancer 55 which can always pulls up a detachable hook 57 is disposed in the ring-shaped part 53. When the winch side rope 52 is wound up by the winch 51, the ring shaped part 53 is temporarily fixed to a specified position. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a net place for preventing dust such as driftwood from accumulating on a water intake screen provided in a river or the like, and particularly to a net place where it is easy to remove dust left on the net place.
[0002]
[Prior art]
Conventionally, this kind of net field has a configuration in which a plurality of floating bodies (floats) are connected and floated on a water surface such as a river. Dust such as trees flowing from the upstream drifts on multiple floating bodies in the net field and stops flowing downstream of the net field.Therefore, it is important that drift trees etc. collide with the intake screen installed downstream of the net field. In addition, it is possible to prevent dust that exceeds the dust-removing capacity of the dust remover attached to the intake port from floating and blocking the intake port (see Patent Document 1).
[0003]
[Patent Document 1]
JP-A-2002-21055 (page 3, FIG. 1-2, FIG. 6)
[0004]
[Problems to be solved by the invention]
However, in the above-mentioned conventional net field, since a plurality of floating bodies are always floating on the water surface, it is not easy to remove dust such as driftwood floating on the plurality of floating bodies. That is, the dust floating on the floating body was removed by a worker on the floating body by hand, and the dust was flown to a water intake downstream of the net place, and the dust that had flowed to the intake screen was attached to the water intake. He was scooped up by a dust remover. However, it is dangerous and inefficient to remove dust from the floating body and flow it downstream of the net field by a manual operation of an operator riding on the floating body.
Therefore, an object of the present invention is to provide a net field capable of easily removing dust floating on a plurality of floating bodies of the net field.
[0005]
[Means for Solving the Problems]
In order to solve the above problem, the invention according to claim 1 provides a pair of pillars in a net place where a plurality of floating bodies are connected to each other in a net place where a plurality of floating bodies are connected to each other, and both ends of the net place body are connected to the pair of floating bodies. An elevating means is provided so as to be able to ascend and descend with respect to the column and to elevate and lower at least one end of the net field main body.
Thereby, usually, the floating body of the net field can move up and down along the water level at the position where the net field such as a river is provided, and when the elevating means lifts at least one end of the net field main body, the lifted portion Of the floating body is moved upward from the surface of the water, so that the dust floating on the floating body flows downstream from the floating body of the net.
[0006]
Further, according to a second aspect of the present invention, in the first aspect of the present invention, the lifting means is connected to one end of the net field main body (connected directly or via a pulley or the like) to a rope. A winch for hoisting and lowering the rope.
This allows the winch to wind up and down the rope, thereby easily raising and lowering one end of the net field main body.
[0007]
Further, according to the invention of claim 3, in the net field according to claim 1, a pulley is attached to one end of the net field main body, a rope is hung on the pulley, and one end of the rope is wound up with a winch. And the rope can be lowered, and the other end of the rope can be pulled upward by a pulling means, and a portion of the rope between the pulley and the pulling means is temporarily locked at a predetermined position. That we can do.
Thereby, a pulley is attached to one end of the net field main body, a rope is hung on the pulley, one end of the rope can be wound up and down with a winch, and the other end of the rope is pulled by a pulling means. Since the rope can be pulled upward, even if the water level at the position where the net field is installed rises and falls, the rope can be prevented from being loosened. Then, a portion of the rope between the pulley and the pulling means is temporarily locked at a predetermined position, and the one end side of the rope is wound up and down with the winch, whereby the net is wound. One end of the field body can be raised and lowered.
[0008]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a front view of a net field according to an embodiment of the present invention, and FIG. 2 is a sectional view taken along line II-II of the floating body of the net field of FIG.
In FIG. 1, the net field 10 includes a net field main body 20, a pair of columns 41 and 42, a winch 51, a balancer 55, and the like.
[0009]
The pair of pillars 41 and 42 are installed facing both edges of the river. Both ends of the net field main body 20 are provided between a pair of columns 41 and 42. That is, sliders 43 and 44 are provided on the columns 41 and 42 so as to be able to move up and down, respectively, and both ends of the net field main body 20 are connected to the sliders 43 and 44, respectively. The net field main body 20 is formed by connecting a plurality of floating bodies 30 with a wire rope 21 and floats on a water surface 61 of a river. Since the length of the net field main body 20 in the illustrated left-right direction corresponds to the width of the river in which the net field 10 is installed, if the width of the river is different, the length of the net field main body 20 in the right-left direction of the net field changes. The number of floating bodies 30 changes.
[0010]
FIG. 2 shows a II-II section of the floating body 30. In FIG. 2, the floating body 30 includes a rectangular frame 31, two hard polyethylene tubes 32, and polyurethane 33. Two rigid polyethylene tubes 32 are arranged adjacent to each other in the frame 31, and polyurethane 33 is filled in each rigid polyethylene tube 32. Since the polyurethane 33 is a foam, it is lighter than water. Therefore, the floating body 30 has a specific gravity lower than that of water as a whole and floats on water. A water surface 61 indicated by a two-dot chain line indicates a water level in a state where the floating body 30 is floated on water. Note that a net hanging portion 34 is formed below the frame 31, and a net 35 is hung by the net hanging portion 34. Further, a weight (for example, a wire rope) 36 is attached to the lower end of the net 35. The weight 36 ensures that the net 35 hangs down. The net 35 can also prevent refuse submerged near the water surface 61 from flowing downstream.
Each of the two wire ropes 21 is attached to both side surfaces of the frame 31 via metal fittings 37.
[0011]
In FIG. 1, the lifting means 50 includes a winch 51, a winch-side rope 52 (including a wire rope), a pulley 54, a balancer 55, a balancer-side rope 56, and the like.
A mount 58 is supported by a support (not shown) near the support 41, and the winch 51 and the balancer 55 are attached to the mount 58. The balancer 55 is the "pulling means" in claim 3.
A pulley 54 is attached to the upper end of one slider 43. The winch-side rope 52 wound around the pulley 54 is wound up and down at one end by a drum (not shown) of the winch 51. A loop 53 is formed at the other end of the winch-side rope 52.
[0012]
The balancer-side rope 56 is disposed such that one end thereof is wound around the balancer 55, and a hook 57 is attached to the other end. The loop 53 is detachably engaged with the hook 57.
Since the balancer 55 is urged to wind up the balancer-side rope 56 by a built-in spring, the winch-side rope 52 is constantly pulled upward by the balancer 55. For this reason, even if the water surface 61 of the river fluctuates up and down, and the slider 43 rises and descends following the fluctuation of the water surface 61, the winch-side rope 52 does not slack. Can be prevented.
[0013]
Since the winch 51 is always locked so that the winch-side rope 52 does not stay stretched, when lifting the slider 43 side of the net field main body 20, the winch 51 is unlocked and the winch side is released. Loosen the rope 52. At this time, the hook 57 is raised by the above function of the balancer 55. Thereafter, a portion of the winch-side rope 52 between the pulley 54 and the balancer 55 is temporarily locked at a predetermined position. For example, the loop portion 53 of the winch-side rope 52 is detached from the hook 57 (or while the loop portion 53 and the hook 57 are locked), and the loop portion 53 is locked to the hook 59 attached to the gantry 58.
Then, when the winch-side rope 52 is wound by the winch 51, the slider 43 rises along the column 41, so that the slider 43 side portion of the net field main body 20 rises from the water surface 61 as shown by a two-dot chain line. Leave.
[0014]
In this case, since the net field main body 20 is formed by connecting the plurality of floating bodies 30 with the wire ropes 21, it is possible to raise one end of the net field main body 20 in a state where the net field main body 20 is curved in the vertical direction. it can. For this reason, since it is not necessary to raise the whole net field main body 20, the power required for the winch 51 can be reduced as compared with the case where the whole net field main body 20 is raised, and the lifting means 50 can be simplified. Can be In addition, since the net field main body 20 is installed in a state of being curved in a bow shape on the downstream side by the flow of the water surface 61, when raising or lowering one end of the net field main body 20, the net field main body 20 is The length in the illustrated lateral direction can be flexibly expanded and contracted.
[0015]
At this time, dust such as driftwood flowing from the upstream of the net place 10 and drifting on the net place main body 20 of the net place 10 passes between the lifted net place main body 20 and the water surface 61 and flows downstream. The dust adheres to the water intake screen (not shown) and is removed by a dust remover (not shown) at the water intake, so that there is no need to manually remove dust that has drifted on the net field main body 20. For this reason, since there is no need to remove dust attached to the floating body 30 of the net field body 20 on the floating body 30, it is possible to prevent the worker from riding on the floating body 30 and performing dangerous work on water. Further, since there is no need for an operator to ride on the floating body 30, the structure of the floating body 30 can be reduced in size and weight, and the cost can be reduced as a whole.
It is desirable that the tension of the hoisting rope, that is, the winch-side rope 52 and the balancer-side rope 56 be set to be lower than that of the winch-side rope 52. If the net field 10 cannot follow the vertical fluctuation of the water surface 61 due to some factor (for example, when the net field main body 20 sinks), the winch-side rope 52 cuts first, so that the winch 51 of the lifting / lowering means 50 is damaged. Can be prevented. As the balancer rope 56, for example, a vinyl hose or the like can be used.
[0016]
In the above-described embodiment, the elevating means moves up and down one end of the net field main body. However, the present invention is not limited to this, and the elevating means may move both ends of the net field main body up and down. Good. Further, although a balancer is used, the present invention is not limited to this, and it is sufficient if the hoisting rope can always be pulled.
Further, the location of the net place is not limited to the water surface of a river, but may be a water surface of a dam lake or the like. Further, it is not necessary for the net field body to completely cross the water surface of a flow such as a river, but may cross a part of the water surface of a flow such as a river.
[0017]
【The invention's effect】
According to the first aspect of the present invention, it is easy to remove dust floating on the floating body of the net place, and it is necessary to manually remove dust floating on the floating body of the net place. Disappears.
Further, according to the second aspect of the present invention, it is easy to raise and lower one end of the net field main body together with the effect of the first aspect of the present invention.
Furthermore, according to the third aspect of the present invention, together with the effect of the first aspect of the present invention, even when the water surface on which the net place is installed rises and falls, the rope for raising and lowering the net place main body is prevented from being loosened. And one end of the net field main body can be raised and lowered smoothly.
[Brief description of the drawings]
FIG. 1 is a front view showing the front of a net field according to an embodiment of the present invention.
FIG. 2 is a sectional view showing a section II-II of the floating body of the net field of FIG. 1;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Net field 20 Net field main body 30 Floating bodies 41, 42 Posts 43, 44 Slider 50 Elevating means 51 Winch 52 Winch side rope 53 Loop part 54 Pulley 57 Hook 59 Hook 55 Balancer (tensile means)
61 Water surface

Claims (3)

In a net place where the net body connecting multiple floating bodies floats on the water surface,
Providing a pair of pillars, extending both ends of the net field main body so as to be able to move up and down between the pair of pillars,
A net field, comprising: lifting means for raising and lowering at least one end of the net field main body. In the net place according to claim 1,
The net field, wherein the elevating means includes a rope connected to one end of the net field main body, and a winch for hoisting and lowering the rope. In the net place according to claim 1,
A pulley is attached to one end of the net field main body, a rope is hung on the pulley, one end of the rope can be hoisted and lowered by a winch, and the other end of the rope is pulled upward by a pulling means. To be able to
A net field, wherein a portion of the rope between the pulley and the pulling means can be temporarily locked at a predetermined position.

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