JP6598463B2 - Sauce intake structure - Google Patents

Description

  The present invention relates to an intake for taking in mud in a dredger that scoops up mud deposited on the bottom of a lake, pond or the like.

  Countermeasures against soil contamination by radioactive cesium diffused in the Fukushima Daiichi Nuclear Power Plant accident in March 2011 are urgently needed. In particular, soil adsorbed with radioactive cesium flows into water due to rainfall and accumulates at the bottom of closed water such as lakes and ponds, resulting in high concentrations of radioactive cesium. When such a closed water area is a pond for agriculture, the cultivated land is recontaminated, and when it is a fishing ground, marine products are contaminated, and urgent measures are required.

  It is known that mud pollution at the bottom of the water is high in the surface layer and low in the deep. Therefore, a considerable amount of contaminated mud can be removed by scooping up mud having a depth of several centimeters to several tens of centimeters on the surface of the water bottom. Patent Document 1 discloses a conventional dredge machine.

  The conventional dredger disclosed in Patent Document 1 is, for example, a stirring blade having a blade at the tip in order to efficiently suck mud even when the water bottom is hard or contains a lot of stones. Is provided on the rotating shaft, and the stirring blade is rotated to scratch the bottom of the water to suck mud.

JP 2008-31745 A

  By the way, when recovering contaminated mud at the bottom of the water, the most important thing to pay attention is to prevent the mud from being rolled up and diffused into the water. That is, it must be performed so that radioactive cesium that has settled at the bottom of the water does not diffuse into the water. However, there is a problem that conventional dredgers cannot respond to such a request.

  Then, in order to solve the said subject, in the present invention, the following bag intake structure etc. are provided. That is, the upper surface that protrudes at least partly from the lower surface relative to the advancing direction, the lower surface that at least partially recedes from the upper surface relative to the advancing direction, and the upper surface and the lower surface. Provided is an eaves inlet structure comprising an intake opening that is open in a direction, a fence that is provided in the intake opening and that prevents clogging of the pipe when sucked in, and an intake pipe.

  Further, the upper surface relatively protruding in the traveling direction, the lower surface relatively receding in the traveling direction, the intake opening opened in the traveling direction sandwiched between the upper surface and the lower surface, and the progress of the intake opening The rear wall that covers the space between the upper and lower surfaces on the rear side, the side wall that covers the space between the upper and lower surfaces on the left and right of the intake opening, and the intake opening that takes up the clogged pipe that is provided in the intake opening And a suction pipe arranged on the rear wall so that the outer wall of the pipe is located at the lowest position excluding the welding area with the lower surface in the height direction of the rear wall. A bag intake structure is provided.

  Moreover, provided with the above-described configuration, a dredging intake structure having a moving shaft for moving itself on the water bottom is provided. Further, the present invention provides a dredging intake structure that has the above-described configuration and has a digging blade that is arranged in the direction of digging a water bottom near the tip of the lower surface of the intake opening. Also provided is a scissor intake structure that has the above-described configuration and further includes a vertical adjustment mechanism for adjusting the vertical edge of the cutting blade with the root side of the blade as an axis.

  In addition, the rear wall surface, the upper and lower upper surfaces and the lower surface of the rear wall surface are relatively rearward in the traveling direction, and the rear wall surface is on the side. Provided is a bag intake structure configured to be substantially V-shaped in a top view and a bottom view so that a portion connected to a wall surface is relatively frontward in the traveling direction. .

  Moreover, the fence is provided with the above-described configuration, and the fence is configured to curve so as to draw an arc that protrudes in the traveling direction from the traveling direction edge of the upper surface toward the traveling direction edge of the lower surface. Provide a structure. Also provided is a bag intake structure having the above-described configuration, in which a moving shaft is provided with a camera that captures an intake opening and a traveling direction. In addition, the suction pipe is provided with the above-described configuration, and the suction pipe structure is configured such that the central axis of the pipe is parallel to the upper surface or the lower surface at the rear wall connecting portion. Also provided is a bag intake structure having the above-described configuration, wherein the upper surface is inclined at least partially downwardly in the traveling direction.

  Also, a dredge device using the dredging inlet structure having the above-described moving shaft, the dredge device having a moving shaft driving unit for moving the moving shaft in a state where the dredger device is fixed. provide.

  Moreover, it is said saddle device, Comprising: The saddle device provided with the detection part which detects the movement load added with respect to the said shaft for a movement is provided. Moreover, it is said saddle device, Comprising: The saddle device provided with the load notification part which notifies the movement load added with respect to the said shaft for a movement with a sound is provided. Moreover, it is said saddle device, Comprising: The saddle device which has a moving shaft height adjustment part which moves the said moving shaft up and down according to movement load in a saddle is provided.

  According to the present invention, it is possible to provide a dredging intake structure suitable for scooping up while suppressing the rolling up of the bottom mud.

The conceptual diagram which shows an example of the aspect which wrinkles using the bag intake structure for Embodiment 1 FIG. 3 is a perspective view illustrating an example of a bag intake structure according to the first embodiment. The front view and side view which show an example of the intake opening structure for bags of Embodiment 1 The top view and bottom view which show an example of the intake structure for bags of Embodiment 1 The perspective view which shows an example of the intake structure for bags of Embodiment 2 The front view and side view which show an example of the intake opening | mouth structure for bags of Embodiment 2 A top view and a bottom view showing an example of the bag intake structure for the second embodiment The perspective view which shows an example of the intake structure for bags of Embodiment 3 The perspective view which shows the other example of the digging blade of the intake structure for ridges of Embodiment 3 The side view which shows the other example of the intake opening structure for bags of Embodiment 3. The conceptual diagram which shows an example of the dredge apparatus of Embodiment 4.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In addition, this invention should not be limited to these embodiments at all, and can be implemented in various modes without departing from the gist thereof.

The first embodiment mainly relates to claims 1, 2, 3, 8, 9, 10 and the like. The second embodiment mainly relates to claims 6 and 7. The third embodiment mainly relates to claims 4 and 5. The fourth embodiment mainly relates to claims 11 to 14 and the like.
<Embodiment 1>
<Overview of Embodiment 1>

  FIG. 1 is a conceptual diagram showing a mode in which mud on the bottom of the water is scooped up by a dredger using the dredging inlet structure according to the present embodiment. As shown in the figure, the “bag intake structure” (0101) of the present embodiment is connected to the “moving shaft” (0102), and the “supporting carriage” (0103) supporting the moving shaft is By moving on the “rail” (0105) laid on the “ship” (0104), the ship moves while scrambling the “water bottom” (0106). In the drawing, there is an “intake opening” (0107) for taking mud in the traveling direction of the dredging intake structure indicated by an arrow, and the mud taken in is connected to an “intake pipe” (0108). Then, it is sucked by a pump or the like and stored in a predetermined “container” (0109). The mud collected in this way is used for a predetermined decontamination process or a disposal process.

The bag intake structure according to this embodiment is characterized in that the upper surface protrudes relatively in the traveling direction with respect to the lower surface in contact with the water bottom. Accordingly, the bottom mud can be taken in by the take-up opening facing obliquely downward while preventing the mud from being rolled up from the bottom by the upper surface.
<Configuration of Embodiment 1>

  FIG. 2 is a conceptual diagram illustrating an example of the bag intake structure according to the present embodiment. The outline of the bag intake structure will be described with reference to FIG. As shown in the figure, the “upper structure for bag” (0201) has the “upper surface” (0202) protruding relative to the “lower surface” (0203) in the traveling direction (arrow in the figure). A “take-in opening” (0204) is provided between the upper surface and the lower surface. By comprising in this way, while obtaining the mud roll-up prevention effect by an upper surface, the area of an opening can be enlarged, an opening can be turned to the water bottom side, and intake efficiency can be improved.

  The “moving shaft connecting member” (0205) provided on the upper surface is a member for connecting a moving shaft for moving the bag intake structure. Further, the “suction pipe” (0206) provided at the rear of the dredging inlet structure is a suction pipe that is connected to a hose or the like and sucks mud taken in from the intake opening. The intake opening is provided with a “fence” (0207), which prevents entry of branches or the like that may cause clogging of the suction pipe.

  FIG. 3 is a front view (a) and a side view (b) of the bag intake structure of FIG. This will be further described with reference to this figure. First, the “upper surface” (0301) protrudes relatively in the traveling direction. The “lower surface” (0302) is relatively retracted in the traveling direction. Here, the traveling direction is a direction in which the dredging intake structure proceeds in order to crush the bottom mud. In FIG.3 (b), the left side is the advancing direction facing this figure.

  Further, the “take-in opening” (0303) for scooping up the mud on the bottom of the water opens in the traveling direction between the upper surface and the lower surface. Then, the “rear wall surface” (0304) blocks the space between the upper surface and the lower surface on the rear side in the traveling direction of the intake opening. The “side wall surface” (0305) closes the upper and lower upper and lower surfaces of the intake opening.

  The intake opening is provided with a “fence” (0306) that prevents the intake tube from being clogged with the intake pipe when it is sucked. The fence divides the intake opening into small openings and prevents entry of objects large enough to clog the tube. As shown in the drawing, since the intake opening is flat in the horizontal direction, a vertical fence is provided to separate the intake opening. The opening width divided by the fence is preferably about 10 cm or less in view of the size of the tree branches deposited on the bottom of the water.

  The “suction pipe” (0307) fulfills a function of sucking it by connecting it to a pump or the like in order to pump up the mud taken up from the intake opening. And it arrange | positions at a rear wall surface so that the outer wall of a pipe | tube may be located in the position which becomes the lowest, preferably excluding the welding area | region with a lower surface in the height direction of a rear wall surface preferably. In order for the mud that has entered through the intake opening to be sucked into the suction pipe without hindrance, it is desirable that the lower surface and the lower end of the suction pipe have the same height. On the other hand, a certain welding area is required to weld the suction pipe to the rear wall surface. Therefore, it is preferable to arrange the suction pipe at a position as low as possible excluding such a welding region.

  In order to make the suction force from the pump etc. work most effectively in the internal space of the bag intake structure, the suction pipe is the central axis of the pipe (in the figure) It is preferable that the configuration be such that the dotted line) is parallel to the upper or lower surface. When the upper surface and the plane are not parallel, it is preferable that the central axis of the pipe at the rear wall connection portion of the suction pipe is parallel to the lower surface.

  Further, the “moving shaft coupling member” (0308) provided on the upper surface is a member for coupling a tubular or rod-shaped moving shaft for moving the dredging inlet structure on the water bottom. The moving shaft is connected by being fitted within the diameter of the tubular member and tightened with a nut or the like. The moving shaft may be provided directly on the upper surface by welding or the like without using a tubular connecting member. Moreover, you may comprise the attitude | position of the bag intake structure with respect to the axial direction of a movement shaft so that a change is possible.

  Moreover, you may comprise so that a camera may be provided in the shaft for a movement. For example, in the case of having a camera for photographing the intake opening and a camera for photographing the traveling direction of the bag intake structure, the bag intake structure is appropriately moved while checking the traveling direction. In addition, it is possible to check and deal with troubles such as branches hanging on the fence. In addition, you may make it image | photograph both a taking-in opening and a advancing direction by providing one camera which has two or more imaging functions instead of providing the camera for imaging | photography each direction separately.

  FIG. 4 shows a top view (a) and a bottom view (b) of the bag intake structure. A description of the configuration already described is omitted. As shown in the figure, the “upper surface” (0401) and the “lower surface” (0402) are formed in a rectangular shape, but the shape is not limited to this, and a trapezoid or home having an edge at which the intake opening is located as a base. You may form in a base shape. Further, the upper surface may be configured to be inclined at least partially downward in the traveling direction.

  In addition, although the lower surface is formed flat in the drawing, a plurality of grooves that are substantially parallel to the traveling direction may be provided, or a plate-like member may be disposed in a direction that is approximately parallel to the traveling direction. By providing these, it is possible to contribute to the reduction of contact resistance with the bottom of the water and the improvement of straightness, and the intake opening can be directed to the front in the direction of travel, enabling efficient dredging of the bottom of the mud. It becomes.

In addition, it is preferable to use iron, steel, etc. which are excellent in mechanical strength as a material which forms the intake structure for dredging, since it may be placed in an environment where water pressure is applied and may collide with rocks or hard ground. Moreover, you may use resin which has the same mechanical strength as iron or steel. In addition, it is also preferable to impart rust prevention properties.
<Embodiment 1 effect>

With the dredging intake structure of the present embodiment, the mud on the bottom of the water can be taken in by the intake opening facing obliquely downward while preventing the mud from rolling up from the bottom of the water.
<Embodiment 2>
<Overview of Embodiment 2>

The bag intake structure of the present embodiment is based on the first embodiment, and is characterized in that a fence is configured to draw an arc that is convex in the traveling direction. Thereby, the inner and outer boundary surfaces in the intake opening formed by the fence can be curved, and accordingly can be made wider than the boundary surface formed by the straight fence. By forming such a boundary surface, it is possible to widely prevent tree branches that can collide at various angles, and even if the tree branch gets caught by the fence due to the expansion of the boundary surface, mud is still entering Effective opening can be ensured. In addition, it is possible to proceed along the unevenness of the bottom of the water.
<Configuration of Embodiment 2>

  FIG. 5 is a perspective view showing an example of the bag intake structure of the present embodiment. As shown in the drawing, in the bag intake structure, the “fence” (0501) protrudes in the traveling direction from the traveling direction edge of the “upper surface” (0502) toward the traveling direction edge of the “lower surface” (0503). It is configured to curve so as to draw an arc. Further, the “side wall surface” (0504) is formed so as to draw a curve similar to the curve drawn by the fence from the position in contact with the traveling direction edge of the upper surface to the traveling direction edge of its own bottom.

  In addition, in the example of the bag intake structure shown in the figure, the lower surface is configured such that the advancing direction edge is further set back than the advancing direction edge of the bottom of the side wall surface. The fence extends into the retreated area.

  FIG. 6 is a side view of the bag intake structure shown in FIG. The “side wall surface” (0601) draws a curve similar to the curve drawn by the fence from the point where it touches the traveling direction edge of the “top surface” (0602) to its own “bottom traveling direction edge region” (0603). Is formed. In the drawing, the hatched area indicates “fence” (0604). Further, the “lower surface” (0605) is configured such that its own “traveling direction edge” (0606) is set back from the traveling direction edge region of the bottom of the side wall surface. And the fence is extended to the edge of the advancing direction of the lower surface.

  As described above, the technical meaning of configuring the fence so as to draw an arc that is convex in the traveling direction is to make the inner and outer boundary surfaces of the intake opening curved and enlarged. In addition, it is possible to proceed along the unevenness of the bottom of the water. Then, the intake opening is enlarged on the lower surface side in contact with the water bottom by retracting the traveling direction edge of the lower surface from the traveling direction edge region of the bottom of the side wall surface and extending the fence to the retracted region. It is possible to scrape mud efficiently.

  Moreover, the protrusion in the advancing direction of the upper surface with respect to the lower surface becomes longer due to the receding edge of the lower surface in the advancing direction. That is, the upper surface area as a ridge covering the intake opening from above is enlarged, and the effect of further preventing the mud soil from being rolled up when scooping up is obtained.

  Furthermore, since the traveling direction edge of the bottom side of the side wall surface is located in front of the traveling direction edge of the lower surface, mud mud rolled up when the traveling direction edge of the lower surface comes into contact with the water bottom is scattered in the lateral direction. This can be prevented.

  As described above, the traveling direction edge of the lower surface where mud is most frequently rolled up is disposed at a position retracted with respect to the traveling direction, and the upper surface and the side wall surface are disposed at positions advanced from the traveling direction edge of the lower surface. By constituting in this way, it is possible to effectively prevent the mud rolled up by the edge in the traveling direction of the lower surface from jumping up from the intake opening and to the left and right sides.

7 is a top view (a) and a bottom view (b) of the bag intake structure shown in FIG. As shown in the figure, the upper and lower upper and lower surfaces of the rear wall surface, the place where the suction pipe is connected to the rear wall surface is relatively rearward in the traveling direction, and the rear wall surface is connected to the side wall surface. It is configured to be substantially V-shaped in a top view and a bottom view so that the portion to be moved is relatively front side in the traveling direction. By comprising in this way, even the mud taken in by the side wall surface side is smoothly introduce | transduced into a suction pipe.
<Embodiment 2 Effect>

The dredging inlet structure of the present embodiment can more effectively prevent the mud from being rolled up during dredging.
<Embodiment 3>
<Overview of Embodiment 3>

The dredging intake structure of the present embodiment is based on the first or second embodiment, and has a digging blade for digging a water bottom. Even when the bottom of the water is tightly tightened by the digging blade, the mud can be scooped up by digging the bottom of the water.
<Configuration of Embodiment 3>

  FIG. 8 is a conceptual diagram showing an example of the bag intake structure of the present embodiment. As shown in the drawing, the “digging blade” (0801) is formed of an elongated plate-like member, and is disposed at the edge in the traveling direction of the “lower surface” (0802), which is in the vicinity of the tip of the lower surface of the intake opening. Further, the engraving blade may be divided into several plate-like members and arranged in the same row in addition to the case where it is constituted by one plate-like member as shown in the figure. Further, the shape and size of the digging blade, the standing angle with respect to the lower surface, and the like can be appropriately changed according to the shape of the drowning water bottom.

  Alternatively, as shown in FIG. 9, a plurality of protruding “digging blades” (0901) may be arranged on the edge in the traveling direction which is the “lower surface” (0902) in the vicinity of the lower surface tip of the intake opening. In the figure, the “fence” (0903) is arranged between the adjacent fences, avoiding the place where it joins with the edge of the lower surface in the traveling direction. As shown in the figure, it is preferable to arrange the digging blade so that it does not line up with the fence in the traveling direction, so that the digging blade can be effectively digged because it comes into contact with the bottom area where the fence does not contact.

  Also in the dredging inlet structure shown in FIG. 9, the shape and size of the digging blades, the arrangement interval of the individual digging blades, and the like can be appropriately changed according to the mode of the drowning water bottom. For example, in the case of a water bottom where a large amount of gravel or stone is present on the surface layer, it is preferable to arrange thin, long and sharp excavating blades with a relatively wide interval. Such a digging blade is preferable for digging mud that accumulates under gravel or stone, etc. Also, the resistance due to digging heavy objects such as gravel and sand by widening the arrangement interval makes the intake structure for dredging It can prevent the body from getting too much and obstructing the progression. In addition, in the case of a water bottom where dead leaves are present on the surface layer, it is preferable to arrange a short digging blade with a relatively narrow interval, because the bottom of the water can be dug shallowly and widely, and mud covered with dead leaves can be easily removed. .

  FIG. 10 is a conceptual diagram showing another example of the bag intake structure of the present embodiment. In this example, the cutting edge of the above-described digging blade has a vertical adjustment mechanism for adjusting the vertical movement around the root side. FIG. 10A shows a state where the blade edge is raised, and FIG. 10B shows a state where the blade edge is lowered.

As an example of the vertical adjustment mechanism, as shown in the drawing, a “digging” is made on a rotatable “shaft” (1001) inserted from the vicinity of the edge in the traveling direction of the bottom of one side wall surface to the same vicinity on the other side wall surface. It is possible to adjust the cutting edge of the digging blade up and down by joining the roots of the “blading blade” (1002) and rotating its axis. It becomes possible to adjust the depth of digging according to the mode of the bottom of the water dredged by such a vertical adjustment mechanism.
<Effect of Embodiment 3>

Even if the bottom of the water is tightly tightened by the dredging inlet structure of the present embodiment, it is possible to scoop up mud by digging the bottom of the water.
<Embodiment 4>
<Outline of Embodiment 4>

The present embodiment relates to a scissor device using the scissor intake structure of any one of the first to third embodiments. As illustrated in FIG. 1, the dredger device moves the dredging intake structure on the bottom of the water by moving the moving shaft connected to the dredging intake structure on the carriage to dredge mud. . In the present embodiment, a scissor device having a configuration related to moving the moving shaft will be described.
<Configuration of Embodiment 4>

  The dredge device of the present embodiment includes at least the dredging intake structure described in any of the first to third embodiments, and a moving shaft for moving the dredging intake structure on the water bottom. Have as a configuration. And it has the movement shaft drive part for moving the movement shaft in the state which fixed the saddle device.

  First, a mode in which the moving shaft is moved in a state where the dredger device is fixed will be described with reference to FIG. FIG. 11 shows an example of the scissors device in the present embodiment when viewed from above. As shown in the figure, the “dredge device” (1100) is provided with a square “opening” (1102) through which the water surface can be seen because the “table boat” (1101) has a square shape.

  A “rail” (1103) is laid on the carrier at the opposite edges of the opening. The "supporting carriage" (1104) that can move in the direction of laying on the rail (the left-right direction in the figure) is a direction substantially orthogonal to the direction of laying the rail with the "moving shaft" (1105) between the rails. It is supported so as to be movable in the vertical direction in the figure. Also, the trolley is fixed on the surface of the water by, for example, binding each of its four corners to the shore of a pond with “wires” (1106). Moreover, when moving the trolley on the water surface, it moves by changing the length of each wire, or changing the location of the shore which binds a wire. The reason why power is not applied to the trolley is to prevent the mud from rolling up due to the power.

  Here, the moving shaft drive unit is constituted by, for example, a support carriage that moves on the rail laid on the carriage while supporting the above-described movement shaft, or moves the support carriage configured as such. An electric motor, an engine, or the like as a power source for causing the movement to be included can also be included as a configuration of the moving shaft drive unit.

  In the scissor device using the scissor intake structure having the moving shaft, the following structure may be further provided.

  First, a “detection unit” may be provided. The “detecting unit” functions to detect a moving load applied to the moving shaft. When dredging, the dredging intake structure is submerged in the bottom of the water and prevented from moving, or the dredging intake structure and moving shaft are blocked from moving by rocks in the bottom of the water or sinking trees. May end up. In such a case, forcibly moving the bag intake port structure, the moving shaft, and the above-described moving shaft driving unit may be damaged. Therefore, by detecting the moving load by the detecting unit, it is possible to avoid damage by taking measures such as stopping the moving shaft when an excessive load is detected.

  For example, when the moving shaft is moved by an electric motor, the function of the detecting unit is to detect the load current of the electric motor, the moving speed of the moving shaft is to be detected, the moving shaft or the saddle take-in For example, the measurement value by a pressure sensor attached to the mouth structure can be detected.

  Further, a “load notification unit” may be provided. The “load notification unit” functions to notify the moving load applied to the moving shaft by sound. For example, when an excessive load is detected, a warning sound may be used for notification, or when not only the warning sound but also the moving load is within a normal range, a notification may be given using some sound. Alternatively, notification by sound may be performed when the moving load is outside the normal range. Moreover, you may notify by the sound volume according to the grade of movement load. Such notification by sound can be performed based on the detection result by the detection unit described above.

  In addition, when the moving shaft is moved using a rotational motion of an engine or an engine, a rotation sound generated with the rotation of the engine or the engine may be used as a notification sound. When an excessive movement load occurs, the rotation of the engine and the engine increases, and the rotation sound changes accordingly, so that the excessive load is notified. Note that these rotational sounds may be amplified and output.

Further, a “moving shaft height adjusting portion” may be provided. The “moving shaft height adjusting portion” functions to move the moving shaft up and down in accordance with the moving load in the bag. For example, when the dredging inlet structure is submerged in the bottom of the water and prevented from moving, the movement load increases. In this case, the moving shaft height adjusting unit raises the saddle intake structure that has been submerged by moving the moving shaft upward. In addition, when the dredging inlet structure moves away from the water bottom, the moving load is reduced compared to when dredging. In this case, the moving shaft height adjusting portion moves the moving shaft downward, and thus the dredged intake structure can be appropriately brought into contact with the water bottom.
<Embodiment 4 effect>

  The dredging device according to the present embodiment enables effective dredging while preventing damage to the dredging device according to the condition of the bottom of the water.

0101 Grain intake structure 0102 Movement shaft 0103 Supporting carriage 0104 Cargo ship 0105 Rail 0106 Water bottom 0107 Intake opening 0108 Suction pipe 0109 Container 0201 Grain intake structure 0202 Upper surface 0203 Lower surface 0204 Intake opening 0205 For movement Shaft connecting member 0206 Suction pipe 0207 Fence

Claims (14)

An upper surface protruding at least partly from the lower surface relative to the traveling direction;
A lower surface for proceeding in a bottomed state in which at least a part of the upper surface is retracted relative to the traveling direction;
An intake opening that is inclined forward in the traveling direction between the upper surface front end and the lower surface front end;
A side wall surface blocking between the upper and lower upper and lower surfaces of the intake opening;
From the upper edge in the direction of travel of the upper surface to the lower edge of the direction of travel in the direction of the bottom, a fence provided in the intake opening to prevent the clogged tube from entering the intake opening;
A suction pipe,
Consists of
The intake opening is a bag intake structure that is surrounded by an upper surface, a lower surface, and a side wall surface. A top surface that protrudes relatively in the direction of travel;
A bottom surface for proceeding in a bottomed state relatively retreating in the traveling direction;
An intake opening that is inclined forward in the traveling direction between the upper surface front end and the lower surface front end;
A rear wall that covers the space between the upper surface and the lower surface on the rear side in the direction of travel of the intake opening;
A side wall surface blocking between the upper and lower upper and lower surfaces of the intake opening;
From the upper edge in the direction of travel of the upper surface to the lower edge of the direction of travel in the direction of the bottom, a fence provided in the intake opening to prevent the clogged tube from entering the intake opening;
A suction pipe arranged on the rear wall so that the outer wall of the pipe is positioned at the lowest position excluding the welding area with the lower surface in the height direction of the rear wall;
Consists of
The intake opening is a bag intake structure that is surrounded by an upper surface, a lower surface, and a side wall surface.   The dredging inlet structure according to claim 1 or 2, further comprising a moving shaft for moving the self on the bottom.   The dredging inlet structure according to any one of claims 1 to 3, further comprising a digging blade arranged in a direction of digging a water bottom near a lower end tip of the intake opening.   The scissor intake structure according to claim 4, further comprising a vertical adjustment mechanism for adjusting the vertical edge of the cutting blade up and down with the root side of the blade as an axis.   The rear wall and the upper and lower upper and lower surfaces of the rear wall are relatively rearward in the direction of travel where the suction pipe is connected to the rear wall, and the portion where the rear wall is connected to the side wall is advanced The bag intake structure according to any one of claims 2 to 5, configured to be substantially V-shaped in a top view and a bottom view so as to be relatively frontward in the direction. body.   The fence according to any one of claims 1 to 6, wherein the fence is configured to curve so as to draw an arc that is convex in the traveling direction from an edge in the traveling direction on the upper surface toward an edge in the traveling direction on the lower surface. Intake structure.   The bag intake structure according to any one of claims 3 to 7, wherein a camera for photographing the intake opening and the traveling direction is provided on the moving shaft. The suction pipe according to any one of claims 2 and 3 to 8 dependent on claim 2, wherein the suction pipe is configured so that the central axis of the pipe is parallel to the upper surface or the lower surface at the rear wall connecting portion. Intake structure.   10. The bag intake structure according to any one of claims 1 to 9, wherein at least a part of the upper surface is inclined downward in the traveling direction.   A scissor device using the scissor intake structure according to any one of claims 4 to 10 dependent on claim 3 or claim 3, wherein the shaft for movement is fixed to the scissor device. A scissor device having a moving shaft drive for moving.   The dredge apparatus according to claim 11, further comprising a detection unit that detects a movement load applied to the movement shaft.   The dredge apparatus of Claim 11 or 12 provided with the load notification part which notifies the movement load added with respect to the said shaft for a movement with a sound.   The dredge apparatus according to any one of claims 11 to 13, further comprising a moving shaft height adjusting portion that moves the moving shaft up and down in accordance with a moving load.

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