JP2020011206A - Sludge scraping device - Google Patents

Abstract

To provide a sludge scraping device capable of suppressing that traveling of endless chain get disordered even when a regulation member is brought into contact with a rail member in a sludge scraper provided in a sedimentation basin in which sludge contained in water while the sludge-containing water flows is deposited on a basin bottom part.SOLUTION: A sludge scraping device includes an endless chain 11 which allows a plurality of scraping members 12 to be attached thereto with an interval, travels and, thereby, circulates the scraping members 12 on the basin bottom part 1d side and the water surface WL side and a first rail member 24 which is elongated in a water current direction, allows the scraping members 12 to be placed thereon and allows the scraping member 12 to slide when the endless chain 11 travels, the scraping member 12, when the endless chain 11 deflects, is brought into contact with the first rail member 24, therefore, has a regulation member 123 which regulates deflection of the endless chain 11 and the regulation member 123 is configured such that a contacting surface 1233s which might be brought into contact with the first rail member 24 from the upper side by the travelling of the endless chain 11 is inclined toward the lower side.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a sludge scraping device provided in a sedimentation basin in which sludge contained in water is settled at the bottom of the pond while the water containing the sludge flows.

  2. Description of the Related Art As a sludge scraping device, there is known a device provided with an endless chain having a scraping member extending in a pond width direction orthogonal to a flow direction of water in which sludge is contained. In this sludge scraping device, a part of an endless chain is wound around a driving wheel, and the endless chain travels by receiving a driving force from the driving wheel, and drives the scraping member on the pond bottom side and the water surface side of the sedimentation basin. It is moving in circulation. In addition, a part of the endless chain is wound around the settling basin, and a driven wheel that rotates following the running of the endless chain is also arranged. The scraping member scrapes sludge settled on the bottom of the pond when traveling on the bottom of the settling pond, and scrapes scum floating on the water surface when traveling on the water surface side. In addition, the settling basin is provided with a rail member that extends in the water flow direction, has a scraping member mounted thereon when the endless chain runs, and has a sliding contact portion on which the scraping member slides.

  By the way, in a sedimentation basin in which a sludge scraping device is installed, an endless chain may come off from rotating wheels such as a driving wheel and a driven wheel due to an earthquake. The endless chain detaching from the rotating wheel is more affected by sloshing, in which the water in the sedimentation basin undulates due to the earthquake, rather than the direct effect of shaking caused by the earthquake. When sloshing occurs, the endless chain swings greatly, and the swaying force is transmitted to the portion of the endless chain that is wound around the rotating wheel, so that the endless chain may come off from the rotating wheel.

  As a countermeasure against this earthquake, it has been proposed to provide a regulating member on the scraping member (for example, see Patent Document 1). The regulating member described in Patent Literature 1 comes into contact with the rail member when the endless chain deflects, and regulates the deflection of the endless chain. When the endless chain travels, the restricting member enters from one end side of the rail member below the sliding contact portion of the rail member, passes through the rail member along with the travel of the endless chain at a distance from the rail member.

JP 2011-5400 A

  However, when the regulating member enters the rail member from one end side below the sliding contact portion of the rail member, the regulating member may come into contact with the rail member from above. When the regulating member contacts the rail member, the running of the endless chain is disturbed.

  SUMMARY OF THE INVENTION In view of the above circumstances, an object of the present invention is to provide a sludge scraping device capable of suppressing the running of an endless chain from being disturbed even when a regulating member contacts a rail member.

A first sludge scraping device of the present invention for solving the above-mentioned object,
In a sludge scraping device provided in a sedimentation basin in which the sludge contained in the sludge is settled at the bottom of the pond while the water containing the sludge flows,
A scraping member that scrapes the sludge settled at the bottom of the pond,
An endless chain in which a plurality of the collecting members are attached at intervals, and the running members circulate the collecting members on the pond bottom side and the water surface side,
A first rail member that extends in a water flow direction in which the water flows and the scraping member is placed and slides when the endless chain runs,
The scraping member has a regulating member that abuts on the first rail member when the endless chain swings, and regulates the swing of the endless chain,
The restricting member is characterized in that a contact surface that may come into contact with the first rail member from above as the endless chain travels is inclined downward.

  The first rail member may be installed on the water surface side, or may be installed on the pond bottom side.

  The contact surface may be an inclined surface that is gradually inclined downward as it goes in the pond width direction of the sedimentation basin.

  The scraping member may extend in a pond width direction of the sedimentation basin, and the first rail member may be provided on both sides of the sedimentation pond in a pond width direction.

  According to the first sludge scraping device of the present invention, when the regulating member comes into contact with the first rail member from above, the regulating member adjusts the inclination of the contact surface in accordance with the traveling of the endless chain. Accordingly, it is possible to smoothly move downward and to prevent the running of the endless chain from being disturbed.

Further, in the first sludge scraping device of the present invention,
The endless chain includes a swirling track extending along the bottom of the pond, an upstream track that rises from the swirling track toward the water surface, and a water surface that extends from upstream to downstream in the water flow direction. However, a water surface trajectory shorter than the attracting trajectory and a orbital trajectory in which a downstream trajectory connecting the water surface trajectory and the attracting trajectory are connected,
The first rail member is installed along the gathering track on the gathering track, and the gathering member attached to an underwater track portion of the endless chain running on the gathering track side of the downstream track in the endless chain. The scraping member is placed and slid,
The endless chain further includes a second rail member on which a scraping member mounted on a water surface track portion of the endless chain running on the water surface track is mounted and the scraping member slides,
The regulating member of the scraping member attached to the underwater track portion abuts on the first rail member when the underwater track portion swings, and regulates the swing of the underwater track portion,
The restricting member of the pushing member attached to the water surface track portion contacts the second rail member when the water surface track portion swings, and regulates the shake of the water surface track portion,
The contact surface may contact the second rail member from above as the endless chain travels.

  In addition, the said 2nd rail member may be installed in each of the both sides of the pond width direction of the said settling pond (the following is the same).

A second sludge scraping device of the present invention for solving the above-mentioned object,
In a sludge scraping device provided in a sedimentation basin in which the sludge contained in the sludge is settled at the bottom of the pond while the water containing the sludge flows,
A scraping member that scrapes the sludge settled at the bottom of the pond,
An endless chain in which a plurality of the collecting members are attached at intervals, and the running members circulate the collecting members on the pond bottom side and the water surface side,
A first rail member that extends in a water flow direction in which the water flows and the scraping member is placed and slides when the endless chain runs,
The scraping member has a regulating member that abuts on the first rail member when the endless chain swings, and regulates the swing of the endless chain,
The first rail member is provided with a guide surface for guiding the regulating member downward when the regulating member comes into contact with the traveling member from above when the endless chain runs.

  The first rail member may be installed on the water surface side, or may be installed on the pond bottom side.

  The guide surface may be an inclined surface that is gradually inclined downward as it goes in the pond width direction of the sedimentation basin.

  The scraping member may extend in a pond width direction of the sedimentation basin, and the first rail member may be provided on both sides of the sedimentation pond in a pond width direction.

  According to the second sludge scraping device of the present invention, when the regulating member contacts the first rail member from above, the regulating member is moved downward by the guide surface in accordance with the traveling of the endless chain. It is smoothly guided, and it is possible to suppress the running of the endless chain from being disturbed.

Further, in the second sludge scraping device of the present invention,
The endless chain includes a swirling track extending along the bottom of the pond, an upstream track that rises from the swirling track toward the water surface, and a water surface that extends from upstream to downstream in the water flow direction. However, a water surface trajectory shorter than the attracting trajectory and a orbital trajectory in which a downstream trajectory connecting the water surface trajectory and the attracting trajectory are connected,
The first rail member is installed along the gathering track on the gathering track, and the gathering member attached to an underwater track portion of the endless chain running on the gathering track side of the downstream track in the endless chain. The scraping member is placed and slid,
The endless chain further includes a second rail member on which a scraping member mounted on a water surface track portion of the endless chain running on the water surface track is mounted and the scraping member slides,
The regulating member of the scraping member attached to the underwater track portion abuts on the first rail member when the underwater track portion swings, and regulates the swing of the underwater track portion,
The restricting member of the pushing member attached to the water surface track portion contacts the second rail member when the water surface track portion swings, and regulates the shake of the water surface track portion,
The second rail member may also be provided with a guide surface that guides the regulating member downward when the regulating member comes into contact with the traveling member from above when the endless chain runs.

Further, in the sludge scraping device of the present invention,
The endless chain includes a swirling track extending along the bottom of the pond, an upstream track that rises from the swirling track toward the water surface, and a water surface that extends from upstream to downstream in the water flow direction. However, a water surface trajectory shorter than the attracting trajectory and a orbital trajectory in which a downstream trajectory connecting the water surface trajectory and the attracting trajectory are connected,
The first rail member is installed along the gathering track on the gathering track, and the gathering member attached to an underwater track portion of the endless chain running on the gathering track side of the downstream track in the endless chain. The scraping member is placed and slid,
The regulating member of the scraping member attached to the underwater track portion abuts on the first rail member when the underwater track portion swings, and regulates the swing of the underwater track portion,
The first rail member is in the vicinity of a region where the regulating member of the pushing member attached to a portion of the endless chain running on the water surface track side in the downstream side track passes when the endless chain runs. May be provided with a space.

  The space may be a space provided by cutting out, or may be a space provided by retreating, by this space, the water surface track side in the downstream track of the endless chain. Interference with the first rail member by the regulating member of the scraping member attached to the traveling portion is suppressed.

  The endless chain is provided with a second rail member on which a scraping member is mounted and which is attached to a portion of the endless chain that runs on the water surface track running on the water surface track, and on which the scraping member slides. Preferably, the second rail member passes through the endless chain as a result of the endless chain running through the regulating member of a pushing member attached to a portion of the endless chain running on the water surface track side of the upstream track. A space may be provided in the vicinity of the region to be formed. The space referred to here may also be a space provided by notching or a space provided by retreating, and this space allows the water surface trajectory in the upstream trajectory of the endless chain. Interference with the second rail member by the regulating member of the scraping member attached to the part traveling on the side is suppressed.

Further, in the sludge scraping device of the present invention,
The endless chain includes a swirling track extending along the bottom of the pond, an upstream track that rises from the swirling track toward the water surface, and a water surface that extends from upstream to downstream in the water flow direction. However, a water surface trajectory shorter than the attracting trajectory and a orbital trajectory in which a downstream trajectory connecting the water surface trajectory and the attracting trajectory are connected,
The first rail member is installed along the gathering track on the gathering track, and the gathering member attached to an underwater track portion of the endless chain running on the gathering track side of the downstream track in the endless chain. The scraping member is placed and slid,
The endless chain further includes a second rail member on which a scraping member mounted on a water surface track portion of the endless chain running on the water surface track is mounted and the scraping member slides,
The regulating member of the scraping member attached to the underwater track portion abuts on the first rail member when the underwater track portion swings, and regulates the swing of the underwater track portion,
The restricting member of the pushing member attached to the water surface track portion contacts the second rail member when the water surface track portion swings, and regulates the shake of the water surface track portion,
The first rail member may be provided outside the sedimentation basin in the pond width direction than the second rail member.

Further, in the sludge scraping device of the present invention,
The endless chain includes a swirling track extending along the bottom of the pond, an upstream track that rises from the swirling track toward the water surface, and a water surface that extends from upstream to downstream in the water flow direction. However, a water surface trajectory shorter than the attracting trajectory and a orbital trajectory in which a downstream trajectory connecting the water surface trajectory and the attracting trajectory are connected,
The first rail member is installed along the gathering track on the gathering track, and the gathering member attached to an underwater track portion of the endless chain running on the gathering track side of the downstream track in the endless chain. The scraping member is placed and slid,
The endless chain further includes a second rail member on which a scraping member mounted on a water surface track portion of the endless chain running on the water surface track is mounted and the scraping member slides,
The regulating member of the scraping member attached to the underwater track portion abuts on the first rail member when the underwater track portion swings, and regulates the swing of the underwater track portion,
The restricting member of the pushing member attached to the water surface track portion contacts the second rail member when the water surface track portion swings, and regulates the shake of the water surface track portion,
The distance between the first rail member and the regulating member of the sliding member sliding on the first rail member is smaller than the distance between the second rail member and the regulating member of the sliding member sliding on the second rail member. A longer mode may be used.

  The second rail member has a portion protruding to the side where the regulating member is provided of the scraping member attached to the water surface track portion, whereas the first rail member includes the underwater member. The scraping member attached to the track portion may not have a portion protruding on the side where the regulating member is provided. Further, the first rail member may have a portion protruding on a side opposite to a side on which the regulating member is provided, of a scraping member attached to the underwater track portion.

  The first rail member and the second rail member are rail members having the same shape, but are mounted in the opposite directions, and the first rail member interferes with the regulating member more than the second rail member. It may be a mode that is difficult to perform.

Further, in the sludge scraping device of the present invention,
The regulating member may have a lateral regulating portion that regulates the endless chain from swinging in the pond width direction of the sedimentation basin,
The restriction member may have an upward restriction part that restricts the endless chain from swinging upward.

  ADVANTAGE OF THE INVENTION According to the sludge scraping apparatus of this invention, even if a regulating member contacts a rail member, it can suppress that running of an endless chain is disturbed.

It is a sectional side view of the sedimentation basin in which the sludge scraping device which is one embodiment of the present invention was installed. It is the elements on larger scale which expanded the A section of FIG. (A) is a BB cross-sectional view of FIG. 2, (b) is a diagram showing an upstream return rail and a regulating member when sloshing occurs due to an earthquake and a water surface orbital portion swings in a pond width direction. (C) is a diagram showing a state in which the protruding portion of the regulating member contacts the sliding contact portion of the upstream return rail from above. It is the figure which showed typically the mode which looked at the downstream of the water flow direction in the water of a sedimentation pond from the lower part of the scum removal apparatus shown in FIG. It is a figure showing the modification of the embodiment explained so far. It is a figure when the return rail of a 2nd embodiment is seen from the upper part. It is a figure when the return rail of a 2nd embodiment is seen from the upper part. The state in which the protruding portion of the regulating member approaches the upstream end portion of the downstream return rail of the second embodiment from obliquely above and enters below the sliding contact portion of the downstream return rail is stepwise. FIG. It is a figure showing the modification of a 2nd embodiment. It is a figure which shows the relationship between the downstream return rail and the protrusion part of a regulating member in the sludge scraping apparatus of 3rd Embodiment. It is a figure which shows the relationship between the downstream return rail 24 and the protrusion part 1233 of the regulating member 123 in the sludge scraping apparatus of 4th Embodiment. It is a figure showing a modification of a regulation member.

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

  FIG. 1 is a side sectional view of a sedimentation tank in which a sludge scraping device according to an embodiment of the present invention is installed.

  The sedimentation basin 1 shown in FIG. 1 is a substantially rectangular pond in plan view, surrounded by an upstream wall 1a, a downstream wall 1b, and a pair of side walls 1c. The sedimentation basin 1 receives water containing sludge such as sewage or rainwater from one end side in the longitudinal direction (the left side in FIG. 1), sediments the sludge contained in the received water at a pond bottom 1d, and the other end side. (Right side in FIG. 1). Hereinafter, the left side in FIG. 1 is referred to as an upstream side, the right side in FIG. 1 is referred to as a downstream side, and a direction from the left side to the right side in FIG. 1 is referred to as a water flow direction. In FIG. 1, the direction perpendicular to the plane of the paper is referred to as a pond width direction. FIG. 1 is a view of the sedimentation pond viewed in the pond width direction.

  As shown in FIG. 1, the sedimentation basin 1 is provided with a sludge scraping device 10, a scum removing device 30, a drain gutter 40, and a sludge pit 50 of the present embodiment. The drain gutter 40 is provided on the downstream side of the sedimentation basin 1. The sludge pit 50 is provided on the upstream side of the sedimentation basin 1.

  The sludge scraping device 10 of the present embodiment includes an endless chain 11. The endless chains 11 are provided at both ends of the sedimentation basin 1 in the pond width direction. Each of a pair of endless chains 11 provided at both ends in the pond width direction has a swirling path Tk extending along the pond bottom 1d and an upstream of the sedimentation pond 1 from the swirling path Tk toward the water surface side. The rising upstream trajectory Tu, the water trajectory Tw extending from the upstream to the downstream in the water flow direction on the water surface side but shorter than the trajectory Tk, and the water trajectory Tw and the trajectory Tk on the downstream side of the sedimentation basin 1. Is a ring-shaped chain that runs on a revolving orbit connected by a downstream orbit Tl connected by a circle.

  A plurality of scraping members 12 extending in the pond width direction are stretched over the pair of endless chains 11. As the endless chain 11 travels on the orbit, the scraping member 12 circulates on the pond bottom 1d side and the water surface WL side. In FIG. 1, the endless chain 11 is shown in a circular orbit.

  Sprockets 14 to 17 are arranged at both ends of each track (Tk, Tu, Tw, Tl). A part of the endless chain 11 is wound around each of the sprockets 14 to 17, and the wound part of the endless chain 11 that is wound around each of the sprockets 14 to 17 is meshed with the sprockets 14 to 17.

  The sprocket 14 is arranged on the upstream side of the water surface trajectory Tw. In the following description, this sprocket 14 is referred to as a driving sprocket 14. A drive shaft 141 is fixed to the center of the drive sprocket 14. The drive shaft 141 extends in the pond width direction, and is rotatably supported by bearings (not shown) fixed to each of the pair of side walls 1c. The drive shaft 141 shown in FIG. 1 is connected to the motor 21 by a drive chain 211. As the motor 21 rotates, the drive sprocket 14 also rotates via the drive shaft 141. The drive sprocket 14 of the present embodiment corresponds to an example of a drive wheel that transmits a driving force to the endless chain 11 and causes the endless chain 11 to travel.

  The motor 21 is a motor that can rotate in both the clockwise direction and the counterclockwise direction in FIG. The motor 21 is normally driven to rotate clockwise in FIG. With the clockwise rotation of the motor 21, the drive sprocket 14 rotates clockwise, causing the endless chain 11 to run clockwise. Hereinafter, the rotation of the drive sprocket 14 in the clockwise direction in FIG. 1 is referred to as forward rotation drive, and the driving of the endless chain 11 in the clockwise direction in FIG. 1 is referred to as forward rotation travel. When the driving sprocket 14 is driven to rotate forward, the water surface track portion 11w of the endless chain 11 on the water surface track Tw travels from the upstream side to the downstream side.

  Further, the motor 21 has a torque limiter function. For example, when an extra load is applied to the motor 21 due to foreign matter biting into the scraping member 12 attached to the endless chain 11 running on the bottom 1d of the pond, the torque limiter function is activated and the motor 21 stops once. . Then, the motor 21 rotates reversely (rotates counterclockwise in FIG. 1) for a short time in order to release the foreign matter from being caught. With the reverse rotation of the motor 21, the drive sprocket 14 rotates counterclockwise in FIG. 1, and makes the endless chain 11 run counterclockwise (so-called reverse operation). Hereinafter, the rotation of the driving sprocket 14 in the counterclockwise direction in FIG. 1 is referred to as reverse driving, and the driving of the endless chain 11 in the counterclockwise direction in FIG. 1 is referred to as reverse driving. When the driving sprocket 14 is driven to rotate in the reverse direction, the water surface track portion 11w travels from the downstream side toward the upstream side.

  The other sprockets 15 to 17 are driven sprockets that rotate following the running of the endless chain 11. Fixed shafts 151, 161, and 171 are passed through central portions of the sprockets 15 to 17, respectively. Each of the fixed shafts 151, 161, 171 is fixedly arranged so as not to rotate around the axis. Each of the sprockets 15 to 17 is rotatable with respect to its fixed shaft 151, 161, 171. Each of the sprockets 14 to 17 is a rotating wheel that rotates around the drive shaft 141 and the fixed shafts 151, 161, and 171 as rotating shafts. In the following description, the sprocket 15 arranged downstream of the water surface trajectory Tw is referred to as an intermediate sprocket 15. The intermediate sprocket 15 corresponds to an example of a driven wheel.

  A plurality of scraping members 12 are attached at equal or substantially equal intervals in the circulation direction over the entire circumference of the orbit of the endless chain 11. A pond bottom rail 23 extending in the longitudinal direction of the settling pond 1 along the pond bottom 1d is fixed to the pond bottom 1d of the settling pond 1. In the pond bottom 1d, the scraping member 12 travels on the swirling track Tk by being guided by the pond bottom rail 23, and scrapes the sludge settled on the pond bottom 1d.

  When the endless chain 11 runs forward, the drag member 12 located on the drag track Tk moves along the pond bottom 1d from the downstream side to the upstream side. The sludge that has settled on the pond bottom 1d is drawn to the sludge pit 50 on the upstream side by the drawing member 12 that moves on the pond bottom 1d. The sludge collected in the sludge pit 50 is discharged outside the sedimentation basin 1 by a sludge pump (not shown).

  Scum is floating on the water surface WL of the sedimentation basin 1. When the endless chain 11 runs forward, the pulling member 12 located on the water surface track Tw moves along the water surface WL from the upstream side to the downstream side. The scum floating on the water surface WL is drawn toward the downstream scum removal device 30 by the drawing member 12 moving on the water surface trajectory Tw. The scum gathered to the scum removing device 30 side is discharged to the outside of the sedimentation basin 1 by the scum removing device 30 together with the water in the sedimentation basin 1. The water in the sedimentation basin 1 from which the scum and sludge have been removed flows under the scum removal device, flows into the drain gutter 40, flows from the drain gutter 40 into a drainage channel (not shown), and is drained to the outside of the sedimentation basin 1. Is done.

  The endless chain 11 is installed from the beginning in the sedimentation basin 1 in a state where there is a margin in the circulation direction in order to prevent the driving force for running the endless chain 11 from increasing. The endless chain 11 is slackened by an amount corresponding to the margin. In addition, the endless chain 11 tends to be stretched for a while after the start of traveling due to break-in of the endless chain 11, creep phenomenon, and the like, and as a result, the slack tends to increase more gradually than when it is installed. After the endless chain 11 has traveled to some extent, almost no elongation occurs.

  When the endless chain 11 travels, a traveling load generated by the scraping member 12 scraping the sludge is applied to the scraping track portion 11k located on the scraping track Tk of the endless chain 11. When the endless chain 11 is traveling forward, tension corresponding to the running load is generated in the endless chain 11 in the scraping track portion 11k and the upstream track portion 11u located on the upstream track Tu. . On the other hand, in the endless chain 11, the downstream track portion 11l located on the water surface track portion 11w and the downstream track Tl is slackened. FIG. 1 shows a state in which the water surface track portion 11w and the downstream track portion 11l are slackened. As shown in FIG. 1, the downstream trajectory Tl is longer than the water trajectory Tw, and the water trajectory Tw is horizontal or almost horizontal, whereas the downstream trajectory Tl is greatly inclined. The slack of the downstream track portion 11l is larger than the slack of the portion 11w.

  Subsequently, a return rail corresponding to an example of a rail member will be described. The sludge scraper 10 shown in FIG. 1 is provided with a downstream return rail 24 and an upstream return rail 25 as rail members.

  Downstream of the sedimentation basin 1 and at a predetermined height from the pond bottom 1d, a downstream return rail 24 substantially parallel to the pond bottom 1d and extending in the longitudinal direction of the sedimentation basin 1 is fixed. . The downstream return rails 24 are attached to a plurality of downstream pedestals 247 fixed to the pair of side walls 1c, respectively. When the endless chain 11 is running forward, the scraping member 12 attached to the endless chain 11 moves to the downstream return rail 24 on the scraping track Tk side (also referred to as the downstream side) of the greatly loosened downstream track Tl. Guided to move. That is, the downstream return rail 24 is installed on the trajectory Tk along the trajectory Tk, and is attached to the underwater trajectory portion 111-1 that runs on the trajectory Tk side of the downstream trajectory Tl of the endless chain 11. The scraping member 12 is placed, and the scraping member 12 slides, and corresponds to an example of a first rail member. As shown in FIG. 1, the trajectory on the side of the drawing trajectory Tk in the downstream trajectory Tl is a horizontal trajectory.

  Further, on the upstream side of the sedimentation basin 1 and near the water surface WL, an upstream return rail 25 extending in the water flow direction along the water surface WL is fixed. That is, the upstream return rail 25 is installed on the water surface side, and the scraping member 12 attached to the water surface track portion 11w of the endless chain 11 is placed thereon, and the scraping member 12 slides. This corresponds to an example of a two-rail member. The upstream return rails 25 are attached to a plurality of upstream pedestals 257 fixed to the pair of side walls 1c, respectively. The drag member 12 attached to the endless chain 11 is guided and moved by the upstream return rail 25 on the water surface track Tw.

  FIG. 2 is a partially enlarged view of the portion A in FIG. In FIG. 2, the endless chain 11 is shown by a dashed line except for a part.

  The endless chain 11 is a metal chain to which a plurality of link members 110 are connected. Note that a resin chain may be used as the endless chain 11. The link members 110 are connected by connecting pins (not shown). In the present embodiment, a link member 110 provided with a stay 113 is disposed every 20 link members 110 connected in the circulation direction of the endless chain 11. In FIG. 2, the link member 110 provided with the stay 113 is shown at the left end. The stay 113 is for connecting the link member 110 and the scraping member 12. The stay 113 and the scraping member 12 shown at the left end of FIG. 2 are connected by screws (not shown). In FIG. 2, two more scraping members 12 are shown, but a link member to which these two scraping members 12 are connected is not shown, and a stay is also not shown.

  The scraping member 12 has a flight plate 121, a return shoe 122, and a regulating member 123. The flight plate 121 is made of stainless steel and has a U-shaped section extending in the pond width direction. The shape of the pushing surface 121c located between the bent surfaces 121a and 121b of the flight plate 121 is rectangular. The return shoe 122 and the regulating member 123 are provided at both ends of the flight plate 121, respectively. The flight plate 121 shown in FIG. 2 also has a protruding edge 121d protruding from the bent surface 121a on the opposite side to the endless chain 11 side.

  As shown in FIG. 2, the upstream return rail 25 is a rail member extending from the drive sprocket 14 to the intermediate sprocket 15. More specifically, the upstream return rail 25 shown in FIG. 2 extends from just above the center of the drive sprocket 14 to just above the center of the intermediate sprocket 15, but just above the center of the drive sprocket 14. It may extend from a position on the intermediate sprocket 15 side, or may extend from a position on the upstream wall 1a (see FIG. 1) side immediately above. Further, it may extend to a position closer to the drive sprocket 14 than directly above the center of the intermediate sprocket 15, or may extend to a position closer to the downstream wall 1b (see FIG. 1) than directly above. It may be something.

  The upstream return rail 25 includes a sliding portion 250 and a lower mounting portion 251.

  FIG. 3A is a sectional view taken along line BB of FIG. FIG. 3A is a cross-sectional view along a vertical line passing through the center of the driving sprocket 14, and the left-right direction of the drawing is the pond width direction of the sedimentation pond 1. In FIG. 3A, a drive chain 211 (see FIG. 1) for transmitting a rotational force to the drive sprocket 14 is not shown.

  As shown in FIG. 3A, the link member 110 includes a pair of left and right link plates 111, 111 facing each other in the pond width direction, and a barrel portion 112 connecting the pair of left and right link plates 111, 111. I have.

  The scraping member 12 shown in FIG. 3A is a scraping member 12 attached to the water surface raceway portion 11w shown in FIGS. 1 and 2, and the scraping member 12 has a water surface in the state of FIG. A scraping shoe 124 is provided on the upper side. When the link member 110 to which the scraping member 12 shown in FIG. 3A is attached travels on the scraping trajectory Tk, the scraping member 12 is turned upside down, and the scraping shoe 124 is turned down. The sliding contact with the pond bottom rail 23 shown in FIG.

  In addition, a return shoe 122 and a regulating member 123 are provided at a lower portion of the scraping member 12 shown in FIG.

  The lower end of the return shoe 122 shown in FIG. 3A protrudes below the flight plate 121, and the lower end of the return shoe 122 is placed on the sliding contact portion 250 of the upstream return rail 25. When the link member 110 to which the scraping member 12 shown in FIG. 3A is attached travels on the water surface track Tw, the return shoe 122 comes into sliding contact with the upstream return rail 25. The outer edge of the return shoe 122 in the pond width direction coincides with the vertical edge of the flight plate 121. On the other hand, a projection 1221 that protrudes downward is provided at a lower corner portion inside the pond width direction of the return shoe 122. That is, the protrusion 1221 protrudes further below the lower end portion of the return shoe 122 protruding below the flight plate 121.

  The regulating member 123 has a base 1231, an arm 1232, and a protrusion 1233. The base portion 1231 of the regulating member 123 is bolted to the scraping member 12 with the return shoe 122 interposed therebetween, and the exchange of the return shoe 122 is easy. The arm portion 1232 is a portion extending downward from the inside of the base portion 1231 in the pond width direction. The protruding portion 1233 is provided at the tip of the arm portion 1232, bends 90 degrees from the arm portion 1232, and protrudes outward in the pond width direction. The shape including the arm portion 1232 and the protruding portion 1233 is a hook shape.

  FIG. 3A shows the downstream end surface of the upstream return rail 25. As shown in FIG. 3A, the upstream return rail 25 has an L-shape in cross section, which is upside down. The mounting portion 251 of the upstream return rail 25 is fixed to the upstream pedestal 257 with a screw (not shown). The sliding portion 250 of the upstream return rail 25 projects inward in the pond width direction. In other words, the restricting member 123 protrudes from the protruding portion 1233 protruding outward in the pond width direction so as to be opposed to the posi- tion 12 in a vertically shifted position. More specifically, the sliding contact portion 250 of the upstream return rail 25 and the protruding portion 1233 of the regulating member 123 shown in FIG. 3A are spaced vertically (for example, 10 mm). The protruding end (width end) 2501 of the sliding contact portion 250 and the protruding end 1233t of the protruding portion 1233 are spaced from each other in the pond width direction (for example, greater than 0 mm and 25 mm or less).

  Further, the leading end 2501 of the sliding portion 250 of the upstream return rail 25 in the protruding direction is opposed to the projection 1221 of the return shoe 122 at an interval in the pond width direction so as to be aligned in the up-down direction. When the scraping member 12 is displaced in the pond width direction, the protrusion 1221 of the return shoe 122 abuts on the leading end 2501 of the sliding contact portion 250 in the protruding direction, thereby preventing the scraping member 12 from further shifting in the pond width direction. The above-mentioned scraping shoe 124 is also provided with a protrusion 1241 for preventing the scraping member 12 from shifting in the pond width direction by contacting the pond bottom rail 23.

  FIG. 3B is a diagram illustrating the upstream return rail 25 and the regulating member 123 when sloshing occurs due to the earthquake and the water surface track portion 11w swings in the pond width direction.

  In FIG. 3B, the shaking due to the earthquake is also applied, and the leading end 2501 of the sliding contact portion 250 in the protruding direction falls under the protrusion 1221 of the return shoe 122. However, the base of the protruding portion 1233 with respect to the arm portion 1232 is in contact with the protruding direction tip 2501, and the water surface track portion 11 w (see FIGS. 1 and 2) is prevented from further swinging in the pond width direction. Have been. Therefore, the base portion of the protruding portion 1233 corresponds to an example of the lateral regulation portion. If the arm portion 1232 extends further downward, the arm portion 1232 comes into contact with the leading end 2501 of the sliding contact portion 250 in the protruding direction. In this case, the arm portion 1232 corresponds to an example of a lateral regulation portion.

  Further, the protruding portion 1233 further protrudes outward in the pond width direction, and before the base portion of the protruding portion 1233 contacts the protruding direction front end 2501 of the sliding contact portion 250, the protruding direction front end 1233t of the protruding portion 1233 is attached to the mounting portion 251. May be brought into contact with the base of the sliding contact portion 250 with respect to. Furthermore, if the arm portion 1232 extends further downward, the protruding end 1233t of the protruding portion 1233 comes into contact with the mounting portion 251.

  FIG. 3C is a diagram illustrating a state in which the protrusion 1233 of the regulating member 123 contacts the sliding contact portion 250 of the upstream return rail 25 from above.

  As shown by the one-dot chain line in FIG. 2, the upstream return rail 25 is installed below a portion of the endless chain 11 that passes through the position of the drive sprocket 14 at 12 o'clock. Therefore, the part of the endless chain 11 that has passed the 12 o'clock position of the drive sprocket 14 approaches the upstream end of the upstream return rail 25 from obliquely above, and the protrusion 1233 of the regulating member 123 It enters below the sliding contact portion 250 of the upstream return rail 25.

  3 (c) is shifted in the pond width direction (shifted to the left in FIG. 3 (c)), and the protrusion 1233 of the regulating member 123 There is a case where the sliding contact portion 250 of the upstream return rail 25 comes into contact with the upper side.

  Here, in the present embodiment, the surface connecting the tip 1233t in the projecting direction of the hook-shaped projecting portion 1233 and the lower end is gradually inclined downward from the tip 1233t in the projecting direction toward the lower end. Hereinafter, a downwardly inclined surface connecting the tip end 1233t of the hook-shaped protruding portion 1233 and the lower end in the protruding direction may come into contact with the sliding contact portion 250 of the upstream return rail 25 as shown in FIG. Therefore, it is referred to as a contact surface 1233s.

  The protruding end 2501 of the sliding contact portion 250 of the upstream return rail 25 is in contact with the contact surface 1233s shown in FIG. As described above, the portion of the endless chain 11 that has passed the 12 o'clock position of the drive sprocket 14 approaches the upstream end portion of the upstream return rail 25 from obliquely above, and originally the protrusion of the regulating member 123. The reference numeral 1233 travels on a downward orbit so as to enter below the sliding contact portion 250 of the upstream return rail 25. In addition, the protruding portion 1233 provided with the contact surface 1233s that is in contact with the protruding end 2501 is directed downward along the inclination of the contact surface 1233s as the endless chain 11 travels. As a result, the regulating member 123 provided with the contact surface 1233s in contact with the protruding direction distal end 2501 can smoothly move downward and suppress the running of the endless chain 11 from being disturbed.

  FIG. 4 is a diagram schematically showing a state where the downstream side in the direction of water flow in the water of the sedimentation basin 1 is viewed from below the scum removal device 30 shown in FIG. The endless chain 11 is formed by connecting a plurality of link members 110 (see FIG. 2), and is represented by one thick black line in FIG.

  In FIG. 4, the near side of the drawing is the upstream side in the water flow direction, and the far side of the drawing is the upstream side in the water flow direction. The left-right direction is the pond width direction of the sedimentation pond 1. In FIG. 4, the downstream trajectory Tl of the endless chain 11 extends toward the sprocket 16 shown in gray at the back of the drawing, and the trajectory Tk returns from the back of the drawing toward the front of the drawing. I have.

  FIG. 4 shows a scraping member 12 attached to the endless chain 11 with a stay 113 interposed therebetween. FIG. 4 shows five scraping members 12. A return shoe 122 and a regulating member 123 are provided at both ends of each scraping member 12. 4, the protruding portion of the return shoe 122 protrudes downward, and the arm portion 1232 of the regulating member 123 also protrudes downward. Extending. The bent surfaces 121a and 121b of the flight plate 121 protrude toward the near side.

  On the other hand, in the pushing member 12 attached to the pushing track portion 11k of the endless chain 11 shown in FIG. 4, the projecting portion of the return shoe 122 projects upward, and the arm portion 1232 of the regulating member 123 also moves upward. Extending to In addition, the scraping shoe 124 is on the lower side and is in sliding contact with the pond bottom rail 23. Note that the scraping surface 121c of the flight plate 121 is located on the near side.

  Also, in FIG. 4, the downstream return rails 24 attached to the downstream pedestal 247 shown in gray are shown at both ends in the pond width direction, and the pond bottom rail 23 is provided in the pond width direction of the pond bottom 1d. It is shown at each end.

  Like the upstream return rail 25, the downstream return rail 24 has an L-shape in cross section, and includes a sliding portion 240 and a mounting portion 241 on the lower side. The mounting portion 241 of the downstream return rail 24 is fixed to the downstream pedestal 247 with a screw (not shown). Similarly to the upstream return rail 25, the sliding contact portion 240 of the downstream return rail 24 also protrudes inward in the pond width direction. In other words, the protruding portion 1233 of the regulating member 123 of the scraping member 12 of the underwater track portion 111-1 that protrudes outward in the pond width direction protrudes so as to be shifted in the vertical direction. Describing in more detail, also in the downstream return rail 24, the sliding contact portion 240 and the protruding portion 1233 of the regulating member 123 are vertically spaced (for example, 10 mm). The protruding end (widthwise end) 2401 of the sliding contact portion 240 and the protruding end of the protruding portion 1233 are spaced from each other in the pond width direction (for example, greater than 0 mm and 25 mm or less).

  Further, the leading end 2401 of the sliding contact portion 240 of the downstream return rail 24 in the protruding direction is also aligned with the protrusion 1221 of the return shoe 122 (see FIG. 3A) in the up-down direction and spaced apart in the pond width direction. Facing each other. When the scraping member 12 is displaced in the pond width direction, the protrusion 1221 (see FIG. 3A) of the return shoe 122 abuts on the leading end 2401 of the sliding contact portion 240 in the protruding direction, and the scraping member 12 moves in the pond width direction. The above deviation is prevented.

  As shown in FIGS. 4 and 1, the portion of the endless chain 11 traveling on the water surface track Tw side in the downstream track Tl is curved downward and slackened. Hereinafter, a portion of the endless chain 11 that runs on the water surface track Tw side of the downstream track Tl is referred to as a slack portion 111-2. The slack portion 111-2 approaches the downstream return rail 24 from obliquely above, and the protruding portion 1233 of the regulating member 123 is originally lower than the sliding contact portion 240 of the downstream return rail 24. Follow the trajectory towards. In addition to this, similarly to the case of the upstream return rail 25 described with reference to FIG. 3C, the protruding end 2401 of the sliding contact portion 240 of the downstream return rail 24 is provided on the contact surface 1233 s of the protrusion 1233. May come in contact. The protruding portion 1233 provided with the contact surface 1233s in contact with the distal end 2401 of the downstream return rail 24 in the protruding direction is also directed downward as the endless chain 11 travels, following the inclination of the contact surface 1233s. As a result, the regulating member 123 provided with the contact surface 1233 s in contact with the distal end 2401 of the downstream return rail 24 moves smoothly downward, and the traveling of the endless chain 11 also moves on the downstream return rail 24. Can be suppressed from being disturbed. In particular, the slack portion 111-2 of the endless chain 11 is curved downward and is slack, so that the track is unstable, and the protruding portion 1233 of the regulating member 123 is larger than the upstream return rail 25. The effect of the contact surface 1233 s inclined downward of the protruding portion 1233 is beneficial because the downstream return rail 24 is easily contacted.

  FIG. 5 is a diagram showing a modification of the embodiment described above. In the following description, components having the same names as the components described so far will be described with the same reference numerals used. In FIG. 5, the left-right direction is the pond width direction of the sedimentation basin 1, the right side of the figure is the pond width direction inside, and the left side is the pond width direction outside.

  In FIG. 5A, the shape of the downstream return rail 24 is different from the shape of the downstream return rail described above. The downstream return rail 24 shown in FIG. 5A is provided with a guide portion 242 in addition to the sliding portion 240 and the mounting portion 241. The sliding portion 240 shown in FIG. 5A protrudes outward in the pond width direction. The guide portion 242 is provided with a guide surface 242s that is inclined downward toward the inside in the pond width direction. The guide surface 242s is inclined from a position one step lower than the sliding contact portion 240. On the other hand, the protruding portion 1233 of the regulating member 123 shown in FIG. 5A does not have a downwardly inclined surface.

  In the diagram shown on the left side of FIG. 5A, the lower end of the protruding portion 1233 in the protruding direction is in contact with the guide portion 242 of the downstream return rail 24.

  The protruding portion 1233 shown in FIG. 5A is guided by the guide surface 242s of the guide portion 242 of the downstream return rail 24 as the endless chain 11 travels, and the regulating member 123 moves smoothly downward. 5A, the lower end of the return shoe 122 is mounted on the sliding contact portion 240 of the downstream return rail 24. As shown in FIG. In addition, a protrusion 1221 for preventing slippage similar to the protrusion 1221 shown in FIG. 3A is provided at a lower corner portion of the return shoe 122 shown in FIG. The sliding contact portion 240 protruding outward in the width direction is opposed to a leading end 2401 in the protruding direction.

  FIG. 5B also shows the shape of the downstream return rail 24 changed. The downstream return rail 24 shown in FIG. 5B is also provided with a guide portion 242 in addition to the sliding portion 240 and the attachment portion 241 protruding outward in the pond width direction. The inclination is inclined from the height position of the sliding contact portion 240. The protruding portion 1233 of the regulating member 123 shown in FIG. 5B is provided with a contact surface 1233s inclined downward. The protruding portion 1233 shown in FIG. 5B is slightly smaller than the protruding portion 1233 shown in FIG. 3A, but has the same basic configuration.

  In the diagram shown on the left side of FIG. 5B, the contact surface 1233s of the protrusion 1233 is in surface contact with the guide surface 242s of the downstream return rail 24. That is, the inclination angle of the protrusion 1233 at the contact surface 1233s is the same as the inclination angle of the downstream return rail 24 at the guide surface 242s.

  As the endless chain 11 travels, the regulating member 123 shown in FIG. 5B smoothly moves downward due to the inclination of the projection 1233 at the contact surface 1233s and the inclination of the guide surface 242s of the downstream return rail 24. 5B, and the lower end of the return shoe 122 is placed on the sliding portion 240 of the downstream return rail 24 as shown in the diagram on the right side of FIG. A protrusion 1221 for preventing slippage is also provided at a lower corner portion of the return shoe 122 shown in FIG. 5B on the outside in the pond width direction, and a leading end 2401 of the sliding contact portion 240 protruding outward in the pond width direction. Facing.

  In the modified example described above, the shape of the downstream return rail 24 is different, but the shape of the upstream return rail 25 may be the same as the shape of the downstream return rail 24 described here, or the shape of the upstream return rail 24 may be different. The shape of the side return rail 25 may be the same as the shape of the upstream side return rail 25 shown in FIG.

  Next, a sludge scraping device according to a second embodiment of the present invention will be described. Also in the description of the sludge scraping device of the second embodiment, the components having the same names as the components described in the description of the sludge scraping device of the first embodiment have the same reference numerals used in the description of the sludge scraping device of the first embodiment. The description is given with the same reference numerals.

  6 and 7 are views of the return rail according to the second embodiment when viewed from above. That is, a plan view of each of the upstream return rail 25 and the downstream return rail is shown. In both FIG. 6 and FIG. 7, the left-right direction of the figure is the pond width direction.

  6 (a) and FIG. 6 (b) and FIGS. 7 (a) and 7 (b), a pair of upstream return rails 25 are shown closer to the upper side, and a pair of downstream return rails are shown below. The side return rail 24 is also shown as approaching. As described above, both the pair of upstream return rails 25 and the pair of downstream return rails 24 are provided on both sides of the sedimentation basin 1 in the pond width direction. In FIG. 7, due to space limitations, they are shown close together. Regardless of the upstream return rail 25 or the downstream return rail 24, the intermediate portion is omitted, the upper side is the upstream side, and the lower side is the downstream side.

  Further, both the upstream return rail 25 and the downstream return rail 24 shown in FIG. 6A and the upstream return rail 25 and the downstream return rail 24 shown in FIG. The shape is an L-shape with the upside down, the mounting portions 251 and 241 are outside in the pond width direction, and the sliding contact portions 250 and 240 are protruding inward in the pond width direction.

  The return rails of the upstream return rail 25 and the downstream return rail 24 shown in FIG. 7A are both upstream rail members 25-1, 24-1, intermediate rail members 25-2, 24-2, The three rail members of the downstream rail members 25-3 and 24-3 are connected (for example, welded or bolted). Each of these three rail members (25-1, 25-2, 25-3, 24-1, 24-2, 24-3) has an L-shaped cross-section inverted and attached. The parts 251 and 241 are outside in the pond width direction, and the sliding contact parts 250 and 240 protrude inward in the pond width direction.

  On the other hand, each of the upstream return rail 25 and the downstream return rail 24 shown in FIG. 7B is formed by bending one rail member. That is, the mounting portions 251 and 241 are located in the center, the sliding contact portions 250 and 240 are bent outward in the pond width direction at the upstream end and the downstream end, and the sliding contact portions 250 and 240 are disposed at the intermediate portion. , 240 are bent inward in the pond width direction. Note that, similarly to the upstream return rail 25 and the downstream return rail 24 shown in FIG. 7A, a configuration in which three rail members are connected may be employed. That is, an upstream rail member in which the sliding contact portions 250 and 240 are bent outward in the pond width direction, an intermediate rail member in which the sliding contact portions 250 and 240 are bent inward in the pond width direction, and a sliding contact portion. 250 and 240 may be connected to downstream rail members bent outward in the pond width direction.

  Regardless of the downstream return rail 24 or the upstream return rail 25 in the first embodiment, the sliding portions 240 and 250 are located at positions (upstream end, intermediate portion, and downstream end). It is the same regardless. On the other hand, in the downstream return rail 24 and the upstream return rail 25 in FIGS. 6A and 6B, notches or cutouts are formed at the upstream and downstream ends of the sliding portions 240 and 250, respectively. An evacuation space is provided and differs depending on the position.

  That is, the sliding contact portions 250 of the pair of upstream return rails 25 shown on the upper side of FIGS. 6A and 6B are provided with notches 25c1 and 25c2 at the upstream end and the downstream end. Have been. The notch 25c1 shown in FIG. 6 (a) is obtained by cutting the inside portion in the pond width direction into a rectangular shape, and the notch 25c2 shown in FIG. 6 (b) cuts the inside portion in the pond width direction into a triangular shape. It is missing. In addition, the space provided by the cutout can be said to be a space provided by retreating from the inside to the outside in the pond width direction. Hereinafter, the space provided by this notch or the space provided by retreating is simply referred to as a space. The sliding contact portions 250 of the pair of upstream return rails 25 shown on the upper side of FIGS. 6A and 6B have a pond width inner portion at the upstream end and a pond width at the downstream end. A space S is provided in the inner part in the direction.

  Also, notches 24c1 and 24c2 are formed at the upstream end and the downstream end of the sliding contact portion 240 of each of the pair of downstream return rails 24 shown on the lower side of FIGS. 6A and 6B. Is provided. The notch 24c1 shown in FIG. 6 (a) also has a rectangular cutout on the inner part in the pond width direction, and the notch 24c2 shown in FIG. 6 (b) also cuts the inner part in the pond width direction into a triangular shape. It is missing. Also in this case, the space provided by notching can be said to be a space provided by retreating from the inside to the outside in the pond width direction, and a pair of spaces shown in the lower part of FIGS. The sliding portion 240 of each of the downstream return rails 24 is also provided with a space S ′ at an inner portion in the pond width direction at the upstream end and an inner portion in the pond width direction at the downstream end.

  In addition, the upstream return rail 25 and the downstream return rail 24 shown in FIG. 7 (a) are configured such that the upstream rail members 25-1, 24-1 and the downstream rail members 25-3, 24-3 are intermediate rail members. The space formed inside the upstream rail members 25-1 and 24-1 is provided at a position shifted to the outside in the pond width direction with respect to the upstream rail members 25-2 and 24-2. It can be said that the space provided by retreating 1, 24-1 to the outside in the pond width direction, the space formed inside the downstream rail members 25-3, 24-3 is the downstream rail members 25-3, 24-. It can be said that it is a space provided by retracting 3 outside the pond width direction. A space S is provided in the pond width direction inner portion of the upstream end portion and the pond width direction inner portion of the downstream end portion of the upstream return rail 25 shown in FIG. 7A, and is shown in FIG. 7A. A space S ′ is provided at the downstream end of the downstream return rail 24 at the upstream end in the pond width direction and at the downstream end of the return rail 24 in the pond width direction.

  Further, the upstream return rail 25 and the downstream return rail 24 shown in FIG. 7B are configured such that the upstream end and the downstream end of the sliding portions 250 and 240 are bent outward in the pond width direction. The space retreated outside in the width direction and the space formed inside the upstream end can be said to be the space provided by retreating the upstream end to the outside in the pond width direction, and can be created inside the downstream end. This space can be said to be a space provided by retracting the downstream end to the outside in the pond width direction. A space S is provided in the pond width direction inner portion of the upstream end of the upstream return rail 25 shown in FIG. 7B and the pond width direction inner portion of the downstream end thereof, as shown in FIG. 7B. A space S ′ is provided at the downstream end of the downstream return rail 24 at the upstream end in the pond width direction and at the downstream end of the return rail 24 in the pond width direction.

  6 (a) and FIG. 6 (b) and the upstream return rail 25 of FIGS. 7 (a) and 7 (b) as well as the space S in each of FIGS. 6 (a) and 6 (b). Even in the space S ′ in each of the downstream return rail 24 in FIG. 7B and the downstream return rail 24 in FIG. 7A and FIG. It becomes space to avoid. That is, the upstream space S of the upstream return rail 25 is formed by the restriction member 123 of the scraping member 12 attached to the slack portion 111-2 running on the water surface track Tw side of the upstream track Tu of the endless chain 11. This is a space near an area where the endless chain 11 passes by traveling. In the example shown in FIG. 6, since there is no sliding contact portion 250 in this space S, the protruding portion 1233 of the regulating member 123 can enter the lower side than the sliding contact portion 250 using this space S. In the example shown in FIG. 7B, since there is no sliding contact portion 250 in this space S, the protruding portion 1233 of the regulating member 123 utilizes this space S to be lower than the sliding contact portion 250 in the intermediate portion. You can get in. In the example shown in FIG. 7A, since there is no rail member itself, the protruding portion 1233 of the regulating member 123 uses this space S to enter below the sliding contact portion 250 of the intermediate rail member 25-2. be able to. The upstream space S ′ in the downstream return rail 24 is a region where the regulating member 123 of the pushing member 12 attached to the slack portion 111-2 of the endless chain 11 passes as the endless chain 11 travels. It is a nearby space. In the example shown in FIG. 6, since there is no sliding contact portion 240 in this space S ′, the protruding portion 1233 of the regulating member 123 can enter the lower side of the sliding contact portion 240 using this space S ′. In the example shown in FIG. 7B, since the space S ′ does not have the sliding contact portion 240, the protruding portion 1233 of the regulating member 123 utilizes this space S ′ to be lower than the sliding contact portion 250 in the intermediate portion. You can get into the side. In the example shown in FIG. 7A, since there is no rail member itself, the protruding portion 1233 of the regulating member 123 utilizes this space S ′ to be lower than the sliding contact portion 240 of the intermediate rail member 24-2. You can get in.

  Here, in both FIGS. 6 (a) and 6 (b) and FIGS. 7 (a) and 7 (b), the upstream space S in the upstream return rail 25 and the upstream space S in the downstream return rail 24 are different. Comparing the space S ′ on the side, the latter is a space longer than the former. That is, in the example shown in FIG. 6, the notch width (retreat width) is the same, but the notch length (retreat length) is longer on the downstream return rail 24 than on the upstream return rail 25. In the example shown in FIG. 7A, the lengths of the upstream rail members 25-1 and 24-1 and the lengths of the downstream rail members 25-3 and 24-3 are lower than the upstream return rail 25. The side return rail 24 is longer. Further, in the example shown in FIG. 7B, the length of the portion (upstream end or downstream end) bent outward in the pond width direction is such that the length of the return rail downstream of the upstream return rail 25 is shorter than that of the upstream return rail 25. 24 is longer. As described above, since the slack portion 111-2 of the endless chain 11 is slack, the track is unstable, and the space on the downstream return rail 24 for avoiding interference with the protrusion 1233 of the regulating member 123 is long. Has been taken. The upstream space S ′ in the downstream return rail 24 may be wider than the upstream space S in the upstream return rail 25. That is, in the example shown in FIG. 6, the notch width (retreat width) may be wider on the downstream return rail 24 than on the upstream return rail 25. In the example shown in FIG. 7A, the mounting position of the upstream rail members 25-1 and 24-1 is such that the downstream return rail 24 is located outside the upstream return rail 25 in the pond width direction. Is also good. Further, in the example shown in FIG. 7B, the bending width of the downstream return rail 24 and that of the upstream return rail 25 are the same, but the bending of the downstream return rail 24 toward the outside in the pond width direction is performed. The bending width for bending inward in the pond width direction may be wider than the width. In other words, the position of the attachment portion 241 may be shifted outward from the center position in the pond width direction.

  6 (a) and FIG. 6 (b) and the upstream return rail 25 of FIGS. 7 (a) and 7 (b). Also in the downstream return rail 24 in FIG. 7B and the downstream return rail 24 in FIG. 7A and FIG. This is a space for preventing interference when exiting the vehicle and for avoiding interference with the protruding portion 1233 when the endless chain 11 runs in the reverse direction. In both the upstream return rail 25 and the downstream return rail 24, the downstream space S, S 'has the same length as the upstream space S, S', but the downstream space S, S '. , S ′ may be shorter than the upstream spaces S, S ′. Although the widths are the same, the widths of the downstream spaces S and S ′ may be narrower than the upstream spaces S and S ′.

  In addition, it is preferable that the contact with the protruding portion 1233 avoids the downstream end of the downstream return rail 24 more easily than the downstream end of the upstream return rail 25. It is preferable to make it easier to avoid the upstream end of the upstream return rail 25 than the end, and to avoid the upstream end of the downstream return rail 24 more than the upstream end of the upstream return rail 25. Preferably, it is easier.

  FIG. 8 shows a state in which the protruding portion of the regulating member approaches the upstream end portion of the downstream return rail of the second embodiment from obliquely above and enters the lower side of the sliding contact portion of the downstream return rail. It is a figure showing a situation in steps. In FIG. 8, the left-right direction is the pond width direction of the sedimentation basin 1, only the pond width direction end portions are shown, and the pond width direction intermediate portion of the scraping member 12 is not shown. In addition, the endless chain 11 is not shown.

  FIG. 8A is a diagram showing, from the downstream side, how the protrusion 1233 of the regulating member 123 approaches the upstream end portion of the downstream return rail 24 shown in FIG. 6A from obliquely above. is there. The regulating member 123 in the second embodiment is the same as the regulating member 123 in the first embodiment, and has a base portion 1231, an arm portion 1232, and a projecting portion 1233. The arm portion 1232 is a portion extending downward, and the projecting portion 1233 is bent 90 degrees from the arm portion 1232 and projects outward in the pond width direction. The scraping member 12 shown in FIG. 8A is shifted to one end side (the left side in FIG. 8) in the pond width direction. Therefore, the protruding portion 1233 of the regulating member 123 on one end side attached to the scraping member 12 approaches the upstream side of the sliding contact portion 240 on the downstream return rail 24. A notch 24c1 is provided at the upstream end of the sliding contact portion 240 in the downstream return rail 24 shown in FIG. 6A, and the portion provided with the notch 24c1 is located from the inside in the pond width direction. The space S 'is open toward the outside. For this reason, the projecting portion 1233 of the regulating member 123 on one end side that has approached may be able to enter below the sliding contact portion 240 using this space S '. That is, it may be possible to prevent the protruding portion 1233 of the regulating member 123 from contacting the downstream return rail 24 in some cases.

  In the example shown in FIG. 8, the displacement of the scraping member 12 in the pond width direction is considerably large, and even if the space S ′ is provided, as shown in FIG. It has contacted the side return rail 24. However, since the contact surface 1233s of the protruding portion 1233 is a surface that is gradually inclined downward toward the other end in the pond width direction, the protruding portion 1233 follows the inclination of the contact surface 1233s as the endless chain 11 runs. To the bottom. This is the same as that described in the first embodiment with reference to FIG.

  In FIG. 8C, the protrusion 1233 of the regulating member 123 enters below the sliding contact portion 240, and the lower end of the return shoe 122 is placed on the sliding contact portion 240 of the downstream return rail 24. . In addition, the displacement of the scraping member 12 toward the one end side in the pond width direction is eliminated, and the scraping member 12 is at a regular position. The protrusion 1233 of the regulating member 123 shown in FIG. 8C has not yet exceeded the notch 24c1 of the downstream return rail 24 shown in the lower part of FIG. 6A, and is shown in FIG. It is at the position of arrow c.

  As the endless chain 11 continues to run, the protruding portion 1233 of the regulating member 123 shown in FIG. 8C eventually exceeds the notch 24c1 of the downstream return rail 24, and the sliding contact portion where the space S ′ is not provided. It reaches below 240. The protruding portion 1233 of the regulating member 123 shown in FIG. 8D is at a position indicated by an arrow d shown in FIG. The protruding end of the protruding portion 1233 of the regulating member 123 shown in FIG. 8D is located directly below the protruding end of the sliding contact portion 240 of the downstream return rail 24.

  The protruding portion 1233 of the regulating member 123 shown in FIG. 8C is protruded when the sloshing due to the earthquake occurs and the underwater track portion 111-1 (see FIGS. 1 and 4) swings in the pond width direction. Abuts on the base of the sliding contact portion 240 with the attachment portion 241 on the downstream return rail 24, and the underwater track portion 111-1 is prevented from swinging further in the pond width direction. However, when sloshing occurs due to the earthquake and the underwater track portion 111-1 shakes upward, the protruding portion 1233 of the regulating member 123 shown in FIG. It does not touch and cannot suppress the upward run-out. On the other hand, the protruding portion 1233 of the restricting member 123 shown in FIG. 8D has a tip in the protruding direction of the protruding portion 1233 even when sloshing due to an earthquake occurs and the underwater track portion 111-1 swings upward. The portion abuts from below on the distal end of the sliding portion 240 of the downstream return rail 24 in the protruding direction, so that the underwater track portion 111-1 is prevented from swinging further upward. The leading end in the protruding direction of the protruding portion 1233 shown in FIG. 8D corresponds to an example of the upward regulating portion. In addition, when the underwater track portion 111-1 swings in the pond width direction, the protruding end 1233t of the protruding portion 1233 shown in FIG. 8D abuts on the downstream return rail 24, and also serves as a lateral direction regulating portion. Function.

  The relationship between the downstream return rail 24 and the protrusion 1233 of the regulating member 123 in the second embodiment has been described above. In the second embodiment, however, the relationship between the upstream return rail 25 and the protrusion 1233 of the regulating member 123 is different. The relationship is the same.

  In most cases, depending on the degree of displacement of the scraping member 12 in the pond width direction, in most cases, the space S ′ prevents the protrusion 1233 of the regulating member 123 from contacting the downstream return rail 24. be able to. Therefore, the space S 'may be provided, and the inclined contact surface 1233s (see FIG. 8B) in the protrusion 1233 may be omitted. For example, the regulating member 123 shown in FIG.

  FIG. 9 is a diagram illustrating a modification of the second embodiment. In FIG. 9, as in FIG. 8, the left-right direction is the pond width direction of the sedimentation basin 1, and only the both ends in the pond width direction are shown. . In addition, the endless chain 11 is not shown.

  Also in the modification of the second embodiment, the sliding contact portions 240 of the pair of downstream return rails 24 are provided with cutouts 24c1 at the upstream end and the downstream end. On the other hand, the regulating member 123 attached to the scraping member 12 is different from the regulating member 123 attached to the scraping member 12 shown in FIG. That is, the arm portion 1232 of the regulating member 123 shown in FIG. 9 is a portion extending downward from the outside of the base portion 1231 in the pond width direction. The protruding portion 1233 is bent 90 degrees from the tip of the arm portion 1232 and protrudes inward in the pond width direction.

  The protruding portion 1233 of the regulating member 123 shown in FIG. 9A is located at a position indicated by an arrow d shown in FIG. 6A. 240 is located directly below the tip portion in the protruding direction.

  FIG. 9B shows a state in which sloshing due to an earthquake occurs and the underwater track portion 111-1 (see FIGS. 1 and 4) swings to one end side (the left side in FIG. 9) in the pond width direction. The arm 1232 located on the outside in the pond width direction of the regulating member 123 on the other end side in the pond width direction (right side in FIG. 9) shown in FIG. 9B is slid on the downstream return rail 24 on the other end side in the pond width direction. The abutment portion 240 abuts on the tip 2401 in the protruding direction, and the underwater track portion 111-1 is prevented from swinging further to one end in the pond width direction.

  FIG. 9C shows a state in which sloshing due to the earthquake has occurred, and the underwater track portion 111-1 has now been swung to the other end in the pond width direction (to the right in FIG. 9). The arm 1232 located on the outer side in the pond width direction of the regulating member 123 on the one end side in the pond width direction (the left side in FIG. 9) shown in FIG. The underwater track portion 111-1 is abutted against the tip 2401 in the protruding direction of 240, and is prevented from further swinging to the other end in the pond width direction.

  Subsequently, a sludge scraping device according to a third embodiment of the present invention will be described. Also in the description of the sludge scraping device of the third embodiment, the components having the same names as the components described in the description of the sludge scraping device of the first embodiment have the same reference numerals used in the description of the sludge scraping device of the first embodiment. The description is given with the same reference numerals.

  FIG. 10 is a diagram showing the relationship between the downstream return rail 24 and the protrusion 1233 of the regulating member 123 in the sludge scraping device of the third embodiment. FIG. 9 is a cross-sectional view along a vertical line passing through the center of the sprocket 16, which is a driven sprocket, and the left-right direction in the figure is the pond width direction of the sedimentation pond 1.

  The relationship between the upstream return rail 25 and the protruding portion 1233 of the regulating member 123 in the sludge scraper of the third embodiment is the same as that of the sludge scraper of the first embodiment, and is as shown in FIG. is there. In FIG. 10, the upstream return rail 25 shown in FIG. 3A is indicated by a dashed line for reference.

  On the other hand, the downstream return rail 24 is located outside the upstream return rail 25 in the pond width direction. In FIG. 10, the downstream return rail 24 is shown in gray. The downstream return rail 24 has the same shape as the upstream return rail 25, has an L-shape in cross section, and includes a sliding contact portion 240 and a lower mounting portion 241. Have been. In the third embodiment, the distance between the upstream return rail 25 and the protrusion 1233 of the regulating member 123 of the scraping member 12 that slides on the upstream return rail 25 is smaller than the distance between the upstream return rail 25 and the downstream return rail 24. The interval in the pool width direction between the scraping member 12 sliding on the downstream return rail 24 and the protrusion 1233 of the regulating member 123 is longer. As described above, since the slack portion 11l-2 of the endless chain 11 is slack, the track is unstable, and the displacement of the drawing member 12 attached to the slack portion 11l-2 in the pond width direction tends to increase. For this reason, the downstream return rail 24 has a longer interval in the pond width direction with the protruding portion 1233 of the regulating member 123 than the upstream return rail 25, so that it is easier to avoid contact with the protruding portion 1233. If the downstream return rail 24 is installed outside the upstream return rail 25 in the pond width direction, the downstream return rail 24 may not need to be provided with the notches 24c1 and 24c2 described with reference to FIG. is there. However, the more the location of the downstream return rail 24 is located outside in the pond width direction, the more difficult it is to regulate the upward direction by the regulating member 123. In some cases, it is preferable to provide a wide portion in the contact portion 240.

  Further, by displacing the installation positions of the downstream return rail 24 and the upstream return rail 25 in the pond width direction, the sliding contact positions of the return shoes 122 are different, and the wear of the return shoes 122 can be dispersed.

  It should be noted that as the downstream return rail 24 is provided on the outside in the pond width direction, it is easier to prevent the protrusion 1233 of the regulating member 123 from contacting the downstream return rail 24. Therefore, the downstream return rail 24 may be provided on the outside in the pond width direction, and the inclined contact surface 1233s of the protruding portion 1233 may be omitted. For example, the regulating member 123 shown in FIG.

  Next, a sludge scraping device according to a fourth embodiment of the present invention will be described. Also in the description of the sludge scraping device of the fourth embodiment, the components having the same names as the components described in the description of the sludge scraping device of the first embodiment have the same reference numerals used in the description of the sludge scraping device of the first embodiment. The description is given with the same reference numerals.

  FIG. 11 is a diagram illustrating a relationship between the downstream return rail 24 and the protruding portion 1233 of the regulating member 123 in the sludge scraping device according to the fourth embodiment. 11 is also a cross-sectional view along a vertical line passing through the center of the sprocket 16, which is a driven sprocket, as in FIG. 10, and the left-right direction in the figure is the pond width direction of the sedimentation basin 1.

  The relationship between the upstream return rail 25 and the protrusion 1233 of the regulating member 123 in the sludge scraping device of the fourth embodiment is the same as that of the sludge scraping device of the first embodiment, as shown in FIG. is there. Also in FIG. 11, the upstream return rail 25 shown in FIG. 3A is shown by a dashed line for reference. In the upstream side return rail 25, the leading end 2501 of the sliding contact portion 250 in the protruding direction faces the inside in the pond width direction.

  On the other hand, in the downstream side return rail 24, the tip 2401 in the protruding direction of the sliding contact portion 240 faces outward in the pond width direction. Also in FIG. 11, the downstream return rail 24 is shown in gray. The downstream return rail 24 has the same shape as the upstream return rail 25, has an L-shape in cross section, and includes a sliding contact portion 240 and a lower mounting portion 241. Have been. However, as described above, the protruding direction of the sliding contact portion 240 is different. This is because the mounting directions of the upstream return rail 25 and the downstream return rail 24 are reversed. That is, the upstream return rail 25 has a portion (sliding contact portion 250) of the scraping member 12 attached to the water surface track portion 11 w (see FIGS. 1 and 2) protruding toward the side where the regulating member 123 is provided. On the other hand, the downstream return rail 24 protrudes to the side where the regulating member 123 of the scraping member 12 attached to the underwater track portion 111-1 (see FIGS. 1 and 4) is provided. There is no portion, and the downstream return rail 24 has a portion (sliding contact portion 240) of the scraping member 12 attached to the underwater track portion 111-1 that protrudes on the opposite side to the side on which the regulating member 123 is provided. Have As a result, the downstream return rail 24 and its downstream return are larger than the distance between the upstream return rail 25 and the protruding portion 1233 of the regulating member 123 of the scraping member 12 that slides on the upstream return rail 25 in the pond width direction. The distance in the pond width direction between the protrusion 1233 of the regulating member 123 and the sliding member 12 that slides on the rail 24 is longer, and even in the sludge scraping device of the fourth embodiment, the upstream return rail is used. The return rail 24 on the downstream side is less likely to interfere with the protrusion 1233 of the regulating member 123 than the return rail 25. As described above, since the slack portion 11l-2 of the endless chain 11 is slack, the track is unstable, and the displacement of the drawing member 12 attached to the slack portion 11l-2 in the pond width direction tends to increase. For this reason, the distance between the downstream return rail 24 and the distal end 1233t of the protruding portion 1233 in the protruding direction is set longer than the upstream return rail 25, so that contact with the protruding portion 1233 is easily avoided.

  In addition, it is easy to avoid that the protrusion 1233 of the regulating member 123 comes into contact with the downstream return rail 24 by directing the tip 2401 of the slide contact portion 240 in the downstream return rail 24 in the protruding direction outward in the pond width direction. Become. Therefore, the downstream return rail 24 may be arranged with the tip 2401 of the sliding contact portion 240 in the protruding direction facing outward in the pond width direction, and the inclined contact surface 1233s of the protruding portion 1233 may be omitted. For example, the regulating member 123 shown in FIG.

  In addition, the downstream return rail or the upstream return rail may have a T-shaped cross-section in addition to an L-shaped cross-section inverted upside down, or a C-shaped cross-section. It may have a U-shaped or U-shaped cross section.

  Furthermore, the intermediate sprocket 15 is omitted, the water surface trajectory Tw is eliminated, and a substantially triangular orbit in which a scraping trajectory Tk, an upstream trajectory Tu which is a rising trajectory, and an inclined trajectory connecting the driving sprocket 14 and the sprocket 16 are connected. In the case of an endless chain traveling on a track, the upstream return rail 25 becomes unnecessary, and the downstream return rail 24 is present. However, the endless chain traveling on such a substantially triangular orbit is used. The technology described here can also be applied to a sludge scraping device having the same.

  Finally, a modification of the regulating member will be described.

  FIG. 12 is a diagram illustrating a modification of the regulating member. FIG. 12 is a cross-sectional view along the vertical line passing through the center of the driving sprocket 14, as in FIG. 3A, and the left-right direction in the figure is the pond width direction of the sedimentation pond 1. In FIG. 12, the drive chain 211 (see FIG. 1) for transmitting the rotational force to the drive sprocket 14 is not shown as in FIG. 3A.

  The regulation member 123 up to now has been attached to the scraping member 12, and was located below the water surface WL. Further, the regulating member 123 has the protruding portion 1233. On the other hand, the regulating member 19 shown in FIG. 12 is not attached to the scraping member 12, but is fixedly arranged above the water surface WL. That is, it is provided near the upper corner of the scraping member 12. The return shoe 122 is attached to the scraping member 12.

  Further, the regulating member 19 shown in FIG. 12 has an L-shaped cross-section inverted upside down, has the same shape as the upstream return rail 25, and has the same water flow direction as the upstream return rail 25. . The regulating member 19 is attached to a plurality of fixing members (not shown) fixed to each of the pair of side walls 1c. The length of the attaching member is shorter than that of the upstream base 257 in the pond width direction. It is a good thing. That is, the attachment member need only be extended to near the upper corner of the scraping member 12.

  The regulating member 19 shown in FIG. 12 has a lateral regulating portion 191 and an upward regulating portion 192. When sloshing due to the earthquake occurs and the water surface orbital portion 11w (see FIGS. 1 and 2) oscillates in the pond width direction, the vertical edge 12a of the scraping member 12 abuts the lateral direction regulating portion 191 and the water surface orbital portion 11w is suppressed from further swinging in the pond width direction. In addition, when sloshing due to the earthquake occurs and the water surface track portion 11w swings upward, the edge 12b in the pond width direction of the scraping member 12 abuts on the upward regulation portion 192, and the water surface track portion 11w moves upward. A larger swing is suppressed.

  In addition, as a countermeasure against the run-out of the underwater track portion 111-1 due to the sloshing of the earthquake, a regulating member is provided in the vicinity of the upper corner of the gathering member 12 attached to the underwater track portion 111-1 in the same manner as the downstream return rail 24. It may be extended. In this case, the regulating member is fixedly disposed in the water.

To summarize the sludge scraping device provided with the regulating member 19 of the modified example described above,
The sludge scraping device provided in a sedimentation basin in which the sludge contained in the sludge is settled at the bottom of the pond while the water containing the sludge flows,
A scraping member that scrapes the sludge settled at the bottom of the pond,
An endless chain in which a plurality of the collecting members are attached at intervals, and the running members circulate the collecting members on the pond bottom side and the water surface side,
A rail member that extends in the water flow direction in which the water flows and the scraping member is placed and slides when the endless chain runs,
A sludge scraping device, comprising: a regulating member that abuts against a scraping member that slides on the first rail member when the endless chain swings, and regulates the swing of the endless chain. "
Becomes

  According to this sludge scraping device, even if an earthquake occurs, the endless chain can be reliably prevented from coming off the sprocket.

  Here, the regulating member abuts on the outer peripheral edge of the scraping member that slides on the rail member when the endless chain swings, and regulates the swing of the endless chain. The shape of the outer peripheral edge may be protruding or concave.

  The regulating member is provided with a portion that contacts the edge of the scraping member in the pond width direction and a portion that contacts the edge of the scraping plate in the vertical direction. That is, it has a lateral regulation portion that regulates the water surface track portion from swinging in the pond width direction, and an upward regulation portion that regulates the water surface track portion from swinging upward.

  The regulating member is disposed near an upper corner of the scraping member that slides on the rail member, and when the endless chain swings, abuts against the upper corner of the scraping member to regulate the swing of the endless chain. Things.

  In addition, the scraping member has a scraping surface of a rectangular shape, but the upper corner may be an R portion instead of a corner.

  The regulating member is attached to a side wall located at an end in the pond width direction via an attaching member. It is only necessary to extend the mounting member from the side wall to the vicinity of the upper corner of the scraper that slides the rail member, and the mounting member can be shortened as described above.

  The rail member extends on the water surface side in the water flow direction in which the water flows, and a scraping plate attached to a water surface track portion running on the water surface side of the endless chain is placed and the scraping plate slides. The regulating member is disposed near an upper corner of the scraping member attached to the water surface track portion, and when the water surface track portion swings, the regulating member contacts the upper corner portion of the scraping member, and the water surface track This controls the deflection of the part.

Also, in the description so far,
The sludge scraping device provided in a sedimentation basin in which the sludge contained in the sludge is settled at the bottom of the pond while the water containing the sludge flows,
A scraping member that scrapes the sludge settled at the bottom of the pond,
A plurality of the collecting members are attached at intervals, a collecting orbit extending along the bottom of the pond, an upstream orbit rising from the collecting orbit toward the water surface, and an upstream from the water flow direction in which the water flows. An endless chain extending on the water surface side toward the downstream side but shorter than the scraping track, and an endless chain running on a revolving track connected with the downstream track connecting the water surface track and the scraping track;
A collecting member mounted on the collecting track along the collecting track and attached to an underwater track portion of the endless chain running on the collecting track side of the downstream track is placed and the collecting member is A sliding first rail member,
A second rail member that extends on the water surface side in the water flow direction and is mounted on a water surface track portion of the endless chain that runs on the water surface track, on which the scraper member slides. ,
The scraping member has a regulating member that regulates run-out of the endless chain,
The regulating member of the scraping member attached to the underwater track portion abuts on the first rail member when the underwater track portion swings, and regulates the swing of the underwater track portion,
The restricting member of the pushing member attached to the water surface track portion contacts the second rail member when the water surface track portion swings, and regulates the shake of the water surface track portion,
The sludge scraping device, wherein the restricting member has a contact surface which may come into contact with the second rail member from above as the endless chain runs, and is inclined downward. "
Was explained.

Also,
The sludge scraping device provided in a sedimentation basin in which the sludge contained in the sludge is settled at the bottom of the pond while the water containing the sludge flows,
A scraping member that scrapes the sludge settled at the bottom of the pond,
A plurality of the collecting members are attached at intervals, a collecting orbit extending along the bottom of the pond, an upstream orbit rising from the collecting orbit toward the water surface, and an upstream from the water flow direction in which the water flows. An endless chain that runs on a water surface trajectory that extends on the water surface side toward the downstream side but is shorter than the scraping trajectory, and runs on a circular track connected to the water surface trajectory and the downstream trajectory that connects the scraping trajectory;
A collecting member mounted on the collecting track along the collecting track and attached to an underwater track portion of the endless chain running on the collecting track side of the downstream track is placed and the collecting member is A sliding first rail member,
A second rail member that extends in the water flow direction on the water surface side and that is attached to a water surface track portion of the endless chain that travels on the water surface track, on which a scraping member is mounted and the scraping member slides; ,
The scraping member has a regulating member that regulates run-out of the endless chain,
The regulating member of the scraping member attached to the underwater track portion abuts on the first rail member when the underwater track portion swings, and regulates the swing of the underwater track portion,
The restricting member of the pushing member attached to the water surface track portion contacts the second rail member when the water surface track portion swings, and regulates the shake of the water surface track portion,
The first rail member is located in the vicinity of a region where the regulating member of the pushing member attached to a portion of the endless chain running on the water surface track side of the downstream side track passes as the endless chain runs. Characterized in that a space is provided in the sludge scraper. "
Was also explained.

  The space may be a space provided by cutting out, or may be a space provided by retreating, by this space, the water surface track side in the downstream track of the endless chain. Interference with the first rail member by the regulating member of the scraping member attached to the traveling portion is suppressed.

  The second rail member is in the vicinity of a region where the regulating member of the scraping member attached to a portion of the endless chain running on the water surface track side of the upstream side track passes when the endless chain runs. May be provided with a space. The space referred to here may also be a space provided by notching or a space provided by retreating, and this space allows the water surface trajectory in the upstream trajectory of the endless chain. Interference with the second rail member by the regulating member of the scraping member attached to the part traveling on the side is suppressed.

In addition,
The sludge scraping device provided in a sedimentation basin in which the sludge contained in the sludge is settled at the bottom of the pond while the water containing the sludge flows,
A scraping member that scrapes the sludge settled at the bottom of the pond,
A plurality of the collecting members are attached at intervals, a collecting track extending along the bottom of the pond, a rising track rising from the collecting track toward the water surface, and an inclination extending from the water surface to the collecting track. An endless chain that runs on an orbit that connects the track,
A collecting member mounted on the collecting track along the collecting track and attached to an underwater track portion of the endless chain running on the collecting track side of the inclined track is placed, and the collecting member is slid. A first rail member that moves,
The scraping member has a regulating member that regulates run-out of the endless chain,
The regulating member of the scraping member attached to the underwater track portion abuts on the first rail member when the underwater track portion swings, and regulates the swing of the underwater track portion,
The first rail member is in the vicinity of a region where the regulating member of the pushing member attached to a portion of the endless chain that travels on the water surface side of the inclined track passes through when the endless chain travels. A sludge scraping device characterized by having a space. "
It may be.

Also,
The sludge scraping device provided in a sedimentation basin in which the sludge contained in the sludge is settled at the bottom of the pond while the water containing the sludge flows,
A scraping member that scrapes the sludge settled at the bottom of the pond,
A plurality of the collecting members are attached at intervals, a collecting orbit extending along the bottom of the pond, an upstream orbit rising from the collecting orbit toward the water surface, and an upstream from the water flow direction in which the water flows. An endless chain extending on the water surface side toward the downstream side but shorter than the scraping track, and an endless chain running on a revolving track connected with the downstream track connecting the water surface track and the scraping track;
A collecting member mounted on the collecting track along the collecting track and attached to an underwater track portion of the endless chain running on the collecting track side of the downstream track on the downstream track is placed and the collecting member is A sliding first rail member,
A second rail member that extends on the water surface side in the water flow direction and is mounted on a water surface track portion of the endless chain that runs on the water surface track, on which the scraper member slides. ,
The scraping member has a regulating member that regulates run-out of the endless chain,
The regulating member of the scraping member attached to the underwater track portion abuts on the first rail member when the underwater track portion swings, and regulates the swing of the underwater track portion,
The restricting member of the pushing member attached to the water surface track portion contacts the second rail member when the water surface track portion swings, and regulates the shake of the water surface track portion,
The said 1st rail member is installed in the pond width direction of the said sedimentation pond rather than the said 2nd rail member, The sludge scraping apparatus characterized by the above-mentioned. "
Was also explained.

Also,
The sludge scraping device provided in a sedimentation basin in which the sludge contained in the sludge is settled at the bottom of the pond while the water containing the sludge flows,
A scraping member that scrapes the sludge settled at the bottom of the pond,
A plurality of the collecting members are attached at intervals, a collecting orbit extending along the bottom of the pond, an upstream orbit rising from the collecting orbit toward the water surface, and an upstream from the water flow direction in which the water flows. An endless chain extending on the water surface side toward the downstream side but shorter than the scraping track, and an endless chain running on a revolving track connected with the downstream track connecting the water surface track and the scraping track;
A collecting member mounted on the collecting track along the collecting track and attached to an underwater track portion of the endless chain running on the collecting track side of the downstream track on the downstream track is placed and the collecting member is A sliding first rail member,
A second rail member that extends on the water surface side in the water flow direction and is mounted on a water surface track portion of the endless chain that runs on the water surface track, on which the scraper member slides. ,
The scraping member has a regulating member that regulates run-out of the endless chain,
The regulating member of the scraping member attached to the underwater track portion abuts on the first rail member when the underwater track portion swings, and regulates the swing of the underwater track portion,
The restricting member of the pushing member attached to the water surface track portion contacts the second rail member when the water surface track portion swings, and regulates the shake of the water surface track portion,
The distance between the first rail member and the regulating member of the sliding member sliding on the first rail member is smaller than the distance between the second rail member and the regulating member of the sliding member sliding on the second rail member. A sludge scraper characterized by being longer. "
Was also explained.

  The scraping member may extend in the pond width direction of the sedimentation basin, and the first rail member may be provided on both sides of the sedimentation pond in the pond width direction. Also, the second rail member may be provided on each of both sides of the sedimentation basin in the pond width direction.

  The second rail member has a portion protruding to the side where the regulating member is provided of the scraping member attached to the water surface track portion, whereas the first rail member includes the underwater member. The scraping member attached to the track portion may not have a portion protruding on the side where the regulating member is provided. Further, the first rail member may have a portion protruding on a side opposite to a side on which the regulating member is provided, of a scraping member attached to the underwater track portion.

  The first rail member and the second rail member are rail members having the same shape, but are mounted in the opposite directions, and the first rail member is more restricted than the second rail member. It may be a mode that does not easily interfere with the image.

  As described above, a plurality of embodiments and modifications have been described, but any of the embodiments and modifications is a high-quality sludge scraping apparatus.

  In addition, even if it is a component contained only in each description of each embodiment and each modification described above, the component may be applied to other embodiments and modifications.

DESCRIPTION OF SYMBOLS 1 Sedimentation basin 1d Pond bottom 10 Sludge scraping device 11 Endless chain 12 Scattering member 123 Restriction member 1233 Projection part 1233s Contact surface 1233t Tip end 16Sprocket 24 Downstream return rail 240 Sliding contact part 242s Guide surface 25 Upstream return rail 250 Sliding Contact part Tw Water surface trajectory Tl Downstream trajectory Tk Squeeze trajectory Tu Upstream trajectory 11w Water surface trajectory 11l Downstream trajectory 1111-1 Underwater trajectory 11l-2 Slack 11k Squeezing trajectory 11u Upstream trajectory

Claims (9)

In a sludge scraping device provided in a sedimentation basin in which the sludge contained in the sludge is settled at the bottom of the pond while the water containing the sludge flows,
A scraping member that scrapes the sludge settled at the bottom of the pond,
An endless chain in which a plurality of the collecting members are attached at intervals, and the running members circulate the collecting members on the pond bottom side and the water surface side,
A first rail member that extends in a water flow direction in which the water flows and the scraping member is placed and slides when the endless chain runs,
The scraping member has a regulating member that abuts on the first rail member when the endless chain swings, and regulates the swing of the endless chain,
The sludge scraping device, wherein the restricting member has a contact surface which may contact the first rail member from above when the endless chain runs, and is inclined downward. The endless chain includes a swirling track extending along the bottom of the pond, an upstream track that rises from the swirling track toward the water surface, and a water surface that extends from upstream to downstream in the water flow direction. However, a water surface trajectory shorter than the attracting trajectory and a orbital trajectory in which a downstream trajectory connecting the water surface trajectory and the attracting trajectory are connected,
The first rail member is installed along the gathering track on the gathering track, and the gathering member attached to an underwater track portion of the endless chain running on the gathering track side of the downstream track in the endless chain. The scraping member is placed and slid,
The endless chain further includes a second rail member on which a scraping member mounted on a water surface track portion of the endless chain running on the water surface track is mounted and the scraping member slides,
The regulating member of the scraping member attached to the underwater track portion abuts on the first rail member when the underwater track portion swings, and regulates the swing of the underwater track portion,
The restricting member of the pushing member attached to the water surface track portion contacts the second rail member when the water surface track portion swings, and regulates the shake of the water surface track portion,
The sludge scraper according to claim 1, wherein the contact surface may contact the second rail member from above as the endless chain travels. In a sludge scraping device provided in a sedimentation basin in which the sludge contained in the sludge is settled at the bottom of the pond while the water containing the sludge flows,
A scraping member that scrapes the sludge settled at the bottom of the pond,
An endless chain in which a plurality of the collecting members are attached at intervals, and the running members circulate the collecting members on the pond bottom side and the water surface side,
A first rail member that extends in a water flow direction in which the water flows and the scraping member is placed and slides when the endless chain runs,
The scraping member has a regulating member that abuts on the first rail member when the endless chain swings, and regulates the swing of the endless chain,
The sludge scraper, wherein the first rail member is provided with a guide surface for guiding the regulating member downward when the regulating member contacts from above by running the endless chain. . The endless chain includes a swirling track extending along the bottom of the pond, an upstream track that rises from the swirling track toward the water surface, and a water surface that extends from upstream to downstream in the water flow direction. However, a water surface trajectory shorter than the attracting trajectory and a orbital trajectory in which a downstream trajectory connecting the water surface trajectory and the attracting trajectory are connected,
The first rail member is installed along the gathering track on the gathering track, and the gathering member attached to an underwater track portion of the endless chain running on the gathering track side of the downstream track in the endless chain. The scraping member is placed and slid,
The endless chain further includes a second rail member on which a scraping member mounted on a water surface track portion of the endless chain running on the water surface track is mounted and the scraping member slides,
The regulating member of the scraping member attached to the underwater track portion abuts on the first rail member when the underwater track portion swings, and regulates the swing of the underwater track portion,
The restricting member of the pushing member attached to the water surface track portion contacts the second rail member when the water surface track portion swings, and regulates the shake of the water surface track portion,
4. The second rail member is also provided with a guide surface for guiding the regulating member downward when the regulating member comes in contact from above by running the endless chain. The sludge scraping device as described. The endless chain includes a swirling track extending along the bottom of the pond, an upstream track that rises from the swirling track toward the water surface, and a water surface that extends from upstream to downstream in the water flow direction. However, a water surface trajectory shorter than the attracting trajectory and a orbital trajectory in which a downstream trajectory connecting the water surface trajectory and the attracting trajectory are connected,
The first rail member is installed along the gathering track on the gathering track, and the gathering member attached to an underwater track portion of the endless chain running on the gathering track side of the downstream track in the endless chain. The scraping member is placed and slid,
The regulating member of the scraping member attached to the underwater track portion abuts on the first rail member when the underwater track portion swings, and regulates the swing of the underwater track portion,
The first rail member is in the vicinity of a region where the regulating member of the pushing member attached to a portion of the endless chain running on the water surface track side in the downstream side track passes when the endless chain runs. 4. The sludge scraping device according to claim 1, wherein a space is provided in the sludge scraping device. The endless chain includes a swirling track extending along the bottom of the pond, an upstream track that rises from the swirling track toward the water surface, and a water surface that extends from upstream to downstream in the water flow direction. However, a water surface trajectory shorter than the attracting trajectory and a orbital trajectory in which a downstream trajectory connecting the water surface trajectory and the attracting trajectory are connected,
The first rail member is installed along the gathering track on the gathering track, and the gathering member attached to an underwater track portion of the endless chain running on the gathering track side of the downstream track in the endless chain. The scraping member is placed and slid,
The endless chain further includes a second rail member on which a scraping member mounted on a water surface track portion of the endless chain running on the water surface track is mounted and the scraping member slides,
The regulating member of the scraping member attached to the underwater track portion abuts on the first rail member when the underwater track portion swings, and regulates the swing of the underwater track portion,
The restricting member of the pushing member attached to the water surface track portion contacts the second rail member when the water surface track portion swings, and regulates the shake of the water surface track portion,
The sludge scraper according to claim 1, wherein the first rail member is provided outside the sedimentation basin in the pond width direction than the second rail member. 5. The endless chain includes a swirling track extending along the bottom of the pond, an upstream track that rises from the swirling track toward the water surface, and a water surface that extends from upstream to downstream in the water flow direction. However, a water surface trajectory shorter than the attracting trajectory and a orbital trajectory in which a downstream trajectory connecting the water surface trajectory and the attracting trajectory are connected,
The first rail member is installed along the gathering track on the gathering track, and the gathering member attached to an underwater track portion of the endless chain running on the gathering track side of the downstream track in the endless chain. The scraping member is placed and slid,
The endless chain further includes a second rail member on which a scraping member mounted on a water surface track portion of the endless chain running on the water surface track is mounted and the scraping member slides,
The regulating member of the scraping member attached to the underwater track portion abuts on the first rail member when the underwater track portion swings, and regulates the swing of the underwater track portion,
The restricting member of the pushing member attached to the water surface track portion contacts the second rail member when the water surface track portion swings, and regulates the shake of the water surface track portion,
The distance between the first rail member and the regulating member of the sliding member sliding on the first rail member is smaller than the distance between the second rail member and the regulating member of the sliding member sliding on the second rail member. The sludge scraping device according to claim 1 or 3, wherein the length is longer.   The sludge according to any one of claims 1 to 7, wherein the restricting member has a lateral restricting portion that restricts the endless chain from swinging in a pond width direction of the sedimentation pond. Scraping device.   The sludge scraping device according to any one of claims 1 to 8, wherein the regulating member has an upward regulating portion that regulates the endless chain from swinging upward.