JPH0643769B2 - Fence for fall prevention on levees - Google Patents

Description

TECHNICAL FIELD The present invention relates to a fall prevention fence on a bank.

[Conventional technology]

Intakes for irrigation water, etc. are provided in some places in the river. The intake usually forms a channel by cutting a part of the embankment so that it is orthogonal to the flow, and penetrates the embankment.
This canal is exposed to the irrigation canal. In addition, a water gate is provided at the entrance of the through hole of the embankment, and the water intake is adjusted by opening and closing the water gate.

In addition, according to the provisions of the River Law, facilities should not be installed in the direction orthogonal to the water flow, so a fall prevention fence (hereinafter referred to as "fence" only) may be provided along the waterway. It is supposed to be impossible. . In other words, if you install a fence, etc. so that it is orthogonal to the water flow,
This is because if the river increases and the fence is submerged, dust and driftwood that has flowed may get caught in the fence, causing turbulent flow such as vortices and breaking the embankment.

[Problems to be Solved by the Invention]

However, since there are no fences, there are many accidents in which children and others fall into the waterways and cause serious injuries. Therefore, in spite of the provisions of the River Law, most of the rivers are currently provided with fences along the waterways.

In view of such circumstances, an object of the present invention is to provide a fall-prevention fence for a dike, which can prevent the flow of the river from being obstructed even if the river increases.

[Problems to be Solved by the Invention]

In order to achieve such an object, a system has been proposed in which the fence is fixed by bolts, and the fence is collapsed by manually releasing the bolts. But,
The river may suddenly increase due to heavy rain and the fence may be submerged in an instant.In such a case, the fence of the above method may cause problems such as poor workability and danger. Do you get it.

The present inventors have completed the present invention as a result of further studies after taking these problems into consideration.

Therefore, the fall prevention fence on the embankment according to the present invention is provided with a fence opening mechanism capable of opening the fence by an operation from an operation unit installed above the embankment such as a sluice gate operation room. .

The fence opening mechanism includes a hinge provided on a leg portion of the fence main body, which allows the fence main body to rotate in the river flow direction, and prevents the hinge from rotating, and fixes the fence main body in an upright state. A method of providing a fixing means capable of releasing the fixation by an operation from the operation section, or a fence main body composed of a plurality of columns standing on the ground and at least one rope stretched between the columns Then, one end of the rope is fixed with an openable fixing means, the other end is connected to the winding means provided in the operating section, one end of the rope is opened by the operation of the operating section, and the rope is wound by the winding means. It is preferable to wind up to open the fence.

The fixing means in the former method is such that the leg portion is provided with a rotatable rotation portion in the circumferential direction together with the hinge, and the rotation portion is rotated to shift the rotation axis of the hinge from the rotation axis of the fence main body. A method of preventing the rotation of the fence main body and fixing the fence main body in an upright position, and releasing the fixation by aligning the pivot axis of the hinge with the pivot axis of the fence main body by the operation from the operation section, or the fence The main body and the fixing member fixed to the standing surface of the fence main body are joined by the engaging means to prevent the rotation axis of the fence main body so that the fence main body is set up and the operation from the operation section is performed. It is preferable to adopt a system in which the engagement is released to allow the fence main body to pivot freely.

Further, the engagement means may be interlocked with the float, and when the float is flooded due to the increase of water in the river, the buoyancy may be used to release the engagement means.

[Work]

With the above-described structure, the barrier for fall prevention of the embankment according to the present invention can immediately open the fence even when the water level suddenly increases by operating the fence opening mechanism from the operation unit.

〔Example〕

Hereinafter, the present invention will be described in detail with reference to the drawings showing an embodiment thereof.

FIGS. 1 and 2 (a) and (b) show a first embodiment of a fall-preventing fence in an embankment according to the present invention.

As shown in the figure, water channels 8 serving as intakes for irrigation water are formed in places of the river 9 so as to cut out a part of the embankment 7. The water channel 8 penetrates the lower part of the embankment 7 and faces an irrigation water channel (not shown) or the like, and a water gate 71 is provided at the entrance of the through hole. The sluice 71 is at the upper part of the embankment 7.
The water gate operation chamber 72 provided so as to project inward is opened and closed by operation to control the inflow amount of water from the river 9 to the irrigation canal or the like.

The fence 1 is arranged on both sides of the water channel 8 and includes a fence body 11 and two legs 12. The leg portion 12 is a fixing portion 12a fixed to the ground G with a bolt or the like.
And a rotating portion 12b which is rotatable above the fixed portion 12a in the circumferential direction of the leg portion 12. A hinge 13 is provided on the rotating portion 12b such that its rotation axis is substantially parallel to the ground G. In this fence 1, the rotating part 12b is rotated to a position where the rotation axis of the hinge 13 intersects the surface of the fence body 11, that is, the rotation axis of the hinge 13 is changed to the fence body 1.
By deviating from the rotation axis of No. 1, the fence main body 11 is kept upright, and the rotation axis of the hinge 13 is made parallel to the surface of the fence main body 11, that is, the rotation axis of the hinge 13 is set to the fence main body 1.
By aligning with the rotation axis of No. 1, the fence main body 11 can be rotated in the flow direction 91 of the river 9.
The fence main body 11 which is rotatable is designed to be tilted in the flow direction 91 by the flow when the river 9 increases in water. Further, each rotating portion 12b is provided with an operating piece 14, and the operating pieces 14 of the adjacent rotating portions 12b are connected by a wire rope 15 and interlock with each other. Further, one end of the operation piece 14 on the most river side has the ground G.
The other end of the coil spring 17 fixed to
The rotating shaft of the hinge 13 is always connected to the rotating body 112b by the fence main body 1
It is biased so that it deviates from the surface of 1. That is, the biasing force of the coil spring 17 displaces the pivot axis of the hinge from the pivot axis of the fence body 11 to keep the fence body 11 in an upright state. On the other hand, one end of the wire rope 15 connected to an operation lever 73 as an operation unit provided in the water gate operation chamber 72 is connected to the operation piece 14 closest to the water gate operation chamber 72. That is, by operating the operation lever 73, the rotating parts 12b can be simultaneously rotated in the same direction.

Since the fence 1 is configured as described above, when the river 9 is flooded due to heavy rain or the like and the fence 1 becomes submerged, the operation lever 13 provided in the sluice gate operation chamber 72 is moved in the direction of arrow A. If it is tilted, the rotating portion 12b rotates in the direction of the arrow B so that the pivot axis of the hinge 13 and the pivot axis of the fence main body 11 are aligned with each other, and the fence main body 11 is, as shown in FIG. It is designed to be pushed down in the downstream direction of the river 9 by the water flow of the river.

Therefore, this fence 1 can usually prevent people from falling into the waterway, and when the river is flooding, open the fence without going to the place where the fence is standing and working. It is possible to work, is safe, and has excellent workability. Also, since the structure of the fence opening mechanism is simple, there is an advantage that no cost is required in terms of maintenance management.

In addition, in the figure, the rotating part 12b and the wire rope 15 are depicted as if they are on the surface of the ground, but in reality, the fence 1
It is housed in a pit (not shown) formed along with and is covered with a lid (not shown) so as not to be touched by a person. Further, although only one operation lever 73 is shown, in reality, another operation lever 73 is provided on the opposite side of the water channel 8.

FIGS. 3 (a) and 3 (b) show a second embodiment of the fall prevention fence on the embankment according to the present invention.

As shown in the figure, each leg 22 of the fence 2 has a fixing member 2
It is fixed to the ground G via 9. Each leg 22 has
A hinge 23 is formed. This hinge 23 is
Similar to the above embodiment, the fence main body 21 is provided so as to be rotatable around the hinge 23 in the flow direction of the river 9. On the ground G below each fence main body 21, a hydraulic jack 25 having an engaging pin 24 above is fixed. The engagement pin 24 is constantly urged upward by a spring 25a provided in the hydraulic jack 25, and engages with an engagement hole 26 provided in a corresponding portion of the fence body 21 to engage the engagement body 24 of the fence body 21. Rotation is prevented and the fence main body 21 is kept in an upright state. Further, the engagement pin 24 enters into the hydraulic jack 25 when oil is press-fitted into a cylinder chamber (not shown), and the engagement with the engagement hole 26 is released, so that the fence main body 21 is released. It can be rotated. In addition, pressurize the oil into the cylinder chamber with the fence 2
This is done by feeding oil to the pipe 28 laid along the line via a manual pump (not shown) provided in the water gate operation chamber 72.

Since the fence 2 is configured as described above, even if the water level suddenly increases in the river 9 due to heavy rain or the like as in the first embodiment, it is only necessary to operate the manual pump in the sluice gate operation room 72. The fixation of the fence main body 21 in the state of being probable can be easily released. Therefore, the fence main body 21 which becomes a flow obstacle
However, it will not fall down due to the flow of the river, which will disturb the flow and generate eddies. Further, since the fences 2 on both sides of the water channel 8 are simultaneously opened by operating one manual pump, there is an advantage that workability is very good.

FIG. 4 shows a third embodiment of the fall prevention fence on the embankment according to the present invention.

As shown in the figure, the fence 3 is composed of a plurality of pillars 31 whose main body is erected along the water channel 8 and a wire rope 32 stretched between the pillars 31. One end of the wire rope 32 is fixed to a manual winch 75 as a winding means provided in the sluice gate operation chamber 72, and an intermediate portion thereof is shown in FIG.
As shown in (a), it is stretched in the shape of a cross rail between the columns 31, and then the other end is wound around and fixed to a fixing member 72 provided in the sluice gate operation chamber 72.

Since the fence 3 is configured as described above, even if the water volume of the river 9 suddenly increases due to heavy rain and the fence 3 is submerged, as shown in FIG. 5 (b), By unwinding the wire rope 32 around the fixing member 76 and winding the wire rope by the manual winch 75, it is possible to easily eliminate the cross rail portion which obstructs the flow. Further, since the structure of the fence opening mechanism is simple, there is also an advantage that it is inexpensive in terms of maintenance.

The guide 33 is preferably a roller. According to the roller, the frictional resistance is reduced and the wire rope can be stretched and wound easily.

FIG. 6 shows a fourth embodiment of a fall-prevention fence in a bank according to the present invention.

As shown in the figure, in this fence 4, a fence main body 41 formed of a metal pipe is divided into two divided bodies 41a and 41b. Each of the divided bodies 41a and 41b is provided with one leg portion 42, and is rotatable about the leg portion 42. In addition, one split body 41a is provided with a pair of upper and lower engaging pins 43 protruding and retracting from the side wall surface thereof. As shown in FIG. 7, the engaging pin 43 is normally urged by a coil spring 44 so as to project from the side wall surface, and this projecting portion causes the other split body 41.
Engagement hole formed on the side wall surface of b (not shown in the figure)
To prevent the divided bodies 41a and 41b from rotating. In addition, the engagement pin 43 is provided on the fence main body 41.
First through the wire rope 45 laid through the inside
In the same manner as in the embodiment described above, it is connected to the operating portion of the water gate operating chamber 72, and by operating an operating lever (not shown) in the operating portion, the user can sink inside the split body 41a and release the engagement. Has become.

Since the fence 4 is configured as described above, even if the water level of the river 9 is rapidly increased due to heavy rain or the like as in the first embodiment, the operation lever is operated in the sluice gate operation room 72 to operate. The fence body 4 can be obtained simply by releasing the engagement of the dowel pin 43.
The one divided body 41a, 41b can be freely rotated around the leg portion 42. That is, in the fence main body 41 which is an obstacle to the flow, the respective divided bodies 41a and 41b rotate in the direction along the flow due to the flow of the river as shown by the chain line in FIG. It will not occur.

FIG. 8 shows a fifth embodiment of the fall prevention fence on the embankment according to the present invention.

As shown in the figure, the fence 5 includes a fence body 51 and four guide rolls 52. The guide roll 52 is
Two side walls 81 of the water channel 8 are fixed so as to face each other. The fence main body 51 has the guide rolls 52 facing each other.
It is arranged between and is slidable up and down. The stopper 53 of the fence main body 51 is fixed to the side wall surface 81. The stopper 53 includes a receiving portion 53a and an operation piece 53b. The receiving portion 53a receives the leg portion of the fence main body 51 from below and supports it so as not to fall down.
On the other hand, the operation piece 53b is an operation lever (not shown) provided in an operation portion such as the water gate operation chamber 72 as in the first embodiment.
Is operated, the receiving portion 53a can be rotated about the rotating shaft 53c via the wire rope 57.
By this rotation, the support of the fence main body 51 of the receiving portion 53a is released, and the fence main body 51 is guided to the guide roll 52 until its upper end becomes substantially flush with the upper end edge of the water channel 8, as shown by the chain line. It is designed to descend along.

In the figure, 59 is a stopper for preventing the fence main body 51 from coming off.

Since the fence 5 is configured as described above, even if the water level of the river 9 is suddenly increased due to heavy rain as in the first embodiment, it is only necessary to operate the operation lever in the water gate operation room 72. The fence main body 51 does not fall into the water channel 8 and hinders the flow to generate a vortex or the like.

FIGS. 9 (a) and 9 (b) show a sixth embodiment of the fall prevention fence on the embankment according to the present invention.

As shown in the figure, this fence 6 is, like the second embodiment,
Two leg portions 42 are formed on the fence main body 61, and each leg portion 62 is fixed to the ground G via a fixing member 69. A hinge 63 is formed on each leg 62. This hinge 6
3 is similar to the first embodiment in that the fence main body 61 has a hinge 63.
Is provided so as to be rotatable in the flow direction 91 of the river 9. On one of the two legs,
Engaging means 65 for preventing rotation of the fence main body 61 is provided. The engagement means 65 is a main body 65a fixed to the ground G.
And an engagement pin 65b and a float 65c. As shown in FIG. 9 (a), the engagement pin 65b is provided with a float 6
When 5c is lowered, it engages with the engaging hole 68 provided in the leg portion 62 and the fixing member 69, and as shown in FIG. 9 (b), when the float 65c is raised, the engagement is made. It is supposed to be released.

Since the fence 6 is configured as described above, when the river 9 is flooded due to heavy rain or the like and the fence 6 is submerged in the flow, the float 65c floats due to its buoyancy, and the engagement pin 65
The engagement of b with the engagement hole 68 is released. Therefore, the fence main body 61, which is an obstacle to the flow, does not fall down to the downstream side due to the flow of the river to hinder the flow and generate a vortex. Moreover, the engagement is released by the float 65c.
Since the buoyancy is used for the operation, there is an advantage that the fence 6 can be opened at the same time as the submergence of the fence 6 even if no person is present.

The fall prevention fence on the embankment according to the present invention is not limited to the above embodiment.

In the first embodiment, the operation pieces 14 are interlocked with each other via the wire rope 15, but a rod structure may be used to form a link structure. In the first embodiment, the rotating parts 12b are rotated by pulling the wire rope 15, but the rotating parts may be rotated by rotating the handle in the operating part in combination with gears and the like. Absent.

In the second embodiment, the engagement pin 24 is operated by the hydraulic jack 25, but it may be operated by a combination of a rack and a pinion. In the second embodiment, the hydraulic jack 25 is fixed to the ground G, but a member having an engagement hole may be provided on the ground G side to fix the hydraulic jack and the like to the fence body 21. . Although oil is injected into the cylinder chamber 25b by the manual pump in the second embodiment, a power pump may be used.

Although the number of wire ropes 32 is one in the third embodiment, a plurality of wire ropes may be stretched in parallel. When using a plurality of wire ropes, one end of the wire ropes should be individually fixed to the pillars arranged closest to the river 9 side through fixing means, and the fixing means can be released individually. Is preferred. In this way, only the part of the wire rope that is submerged in water can be wound up, and the recovery work when water is drawn becomes easy. In the third embodiment, the wire rope 32
Although the manual winch 75 is used for winding, the power winch may be used for winding.

In the fourth embodiment, the fence main body is divided into two parts, and each divided body is rotatable around the legs. However, a rotary shaft is provided horizontally in the central part of the fence main body on the river surface and engaged. Is released,
The fence body may be leveled by the flow of the river.

In the fifth embodiment, the fence main body 51 descends into the water channel 8 along the guide roll 52, but a groove is formed in the ground along the water channel 8 and the fence main body is placed in this groove. It may be possible to accommodate it.

In the first, second, fourth, fifth and sixth embodiments, the fence main body is provided with two legs, but three or more legs may be provided.

In the first to fifth embodiments, the operation section is provided in the sluice gate operation room, but if it is a place where it is not submerged when the water level increases,
The installation location is not particularly limited. Also, the first, second,
In the fourth and fifth embodiments, as in the sixth embodiment, the fence may be opened by the float.

〔The invention's effect〕

Since the fall prevention fence on the embankment according to the present invention is configured as described above, it can be opened when the river is flooded, which obstructs the flow and prevents the embankment from being destroyed due to the generation of vortices. Moreover, it is easy to open the fence without going to the vicinity of the fence, which is safe and can cope with sudden water increases.

[Brief description of drawings]

FIG. 1 is a perspective view showing a first embodiment of a fence according to the present invention, and FIGS. 2 (a) and 2 (b) are perspective views showing an operating state of a rotating portion as its fixing means. Figure (a) shows the state where the rotating part is biased by the spring and the pivot axis of the hinge and the pivot axis of the fence body are misaligned, and the figure (b) shows the rotating part rotated by the operation of the manual lever. The rotation axis of the hinge and the rotation axis of the fence body are aligned with each other. FIGS. 3 (a) and 3 (b) are views for explaining the operation of the fixing means in the second embodiment of the fence according to the present invention, and FIG. 3 (a) shows that the engaging means is engaged. Figure 2 (b)
Represents the state in which the engagement is released. FIG. 4 is a perspective view showing a fence of a third embodiment of the fence according to the present invention, and FIGS. 5 (a) and 5 (b) are views for explaining the opening mechanism of the fence. Shows a state in which the wire rope is stretched, and FIG. 6 (b) shows a state in which the wire rope is wound and the fence is opened. FIG. 6 is a perspective view showing a fence main body portion of a fourth embodiment of the shelf according to the present invention, and FIG. 7 is a partial perspective view showing a notch of an engaging pin portion thereof. FIG. 8 is a perspective view showing a fence main body portion of a fence according to a fifth embodiment of the present invention. 9 (a) and 9 (b) are views for explaining the operation of the engaging means of the fence main body of the sixth embodiment of the fence according to the present invention.
(a) shows a state in which the engagement pin of the engagement means is engaged with the engagement hole, and the fence main body is fixed to the standing state.
Indicates that the float is lifted and the engagement pin is disengaged. 1, 2, 3, 4, 5, 6 ... Fence, 7 ... Levee, 8 ... Waterway, 9 ... River, 11, 21, 41, 51, 61 ... Fence body, 12, 22, 42, 62: legs, 13, 23,
63 ... Hinge, 32 ... Wire rope

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Shinji Motoki 11-1 Yamadaikekitamachi, Hirakata-shi, Osaka Prefecture, Kinki Regional Construction Bureau, Kinki Technical Office, Ministry of Construction (72) Yoshinori Nakano, Daigo-cho, Kashihara-shi, Nara 459-33 (72) Inventor Mitsuya Sakai 1-7-4 Hirano, Kashiwara City, Osaka Prefecture (72) Inventor Iwano INOSHITA 296-6 (72) Inventor Akira Ide Daito City, Osaka Prefecture 3-2 Tsunobe Town (72) Inventor Yoshiharu Kimura 592 Kamogami, Gosho City, Nara Prefecture (72) Inventor Yozo Kurazono 1-9-10 Kojidai, Nishi-ku, Kobe City, Hyogo Prefecture (72) Hirotoshi Nagao Maruhashi Town, Nishinomiya City, Hyogo Prefecture 4-6

Claims (8)

[Claims] 1. A fall prevention fence, which is erected so as to cross a river embankment, is provided with a fence opening mechanism that allows the fence to be opened by an operation from an operation unit provided on the upper part of the embankment. A fence for fall prevention on embankments, which is characterized in that 2. A fence opening mechanism, which is formed on a leg portion of the fence and allows the fence main body to rotate in the river flow direction, and the hinge to prevent the hinge from rotating so that the fence is set up. The fall prevention fence for an embankment according to claim 1, comprising fixing means for fixing and releasing the fixing by an operation from an operating portion. 3. The fixing means is a rotating portion which is provided in the vicinity of the base portion of the leg portion and which rotates in the circumferential direction of the leg portion together with the hinge by an operation from the operating portion, and the rotating portion has a rotation axis of the hinge. The fence is held at a position deviated from the pivot axis to prevent the fence from pivoting, and the hinge pivot axis is rotated so as to match the fence pivot axis to release the lock. The fence for preventing falls on the embankment according to claim 2. 4. The fall prevention fence for an embankment according to claim 2, wherein the fixing means is an engagement means for engaging the fence main body and a fixing member fixed to the standing surface of the fence main body. 5. A fence main body is composed of a plurality of columns standing upright at a predetermined interval along a waterway, and at least one rope stretched between these columns to form a cross rail of the fence main body. One end of the rope is connected to a winding device provided in the operation portion and the other end is fixed to a fixing means that can be released from the fixation by an operation from the operation portion. The fence for preventing a fall in a levee according to claim 1, wherein the means is released and the fence is opened by being wound by the winding device. 6. A fence opening mechanism for rotating the fence main body in the circumferential direction of the integrated leg, and a rotation mechanism for preventing the rotation of the fence main body by the rotating mechanism to fix the fence main body. The fence for preventing a fall in a levee according to claim 1, comprising a fixing means for releasing the fixing by an operation from a portion. 7. The fence opening mechanism supports the fence main body so that the upper end of the fence main body can be lowered to a position where the upper end of the fence main body is below the ground, and the fence main body is prevented from descending to support the fence main body in a state of protruding from the ground. At the same time, the fence for falling prevention on the embankment according to claim 1, comprising a releasing means for releasing the support by an operation from an operating portion. 8. A fall prevention fence, which is erected along a waterway formed so as to cross a river embankment, wherein the fence main body rotates in the river flow direction by a hinge formed on a leg of the fence. The rotation is prevented by the engagement of the engagement means, and the engagement means is provided with an engagement release means having a float, which prevents the float from being flooded. The fall prevention fence on an embankment, wherein the engagement is released by buoyancy.