JP2019130482A - Sludge scraping apparatus - Google Patents

Abstract

To provide a sludge scraping apparatus where the suppression effect of rolling caused by sloshing is enhanced by clarifying standard of position restriction to relative displacement in a horizontal direction of a flight member and a pressing member and workability when installing a support mechanism is superior.SOLUTION: In a sludge scraping apparatus, horizontally pressing members 8' inhibiting the movement of a flight member 5 running on a guide rail 7 toward right and left side wall parts are oppositely arranged so as to sandwich the flight member 5 along the extension direction of the guide rail 7, and a distance d between the opposite end surface 51 of the flight member 5 opposing the horizontally pressing member 8' and the horizontally pressing member 8' is set in a range satisfying (L-r)/2<d<(L+r)/2 as the standard of an opposite end surface position when the center of the guide rail 7 in a width direction coincides with the center of the a guide shoe 5a in a width direction, where the slide allowable width of the guide shoe 5a is L and the slide rail width of the guide rail 7 is r.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a sludge scraping device that scrapes sludge deposited in a sedimentation basin and deposited on the bottom of the pond in one direction.

  The sludge scraping device moves with the traveling of the endless chain, a pair of endless chains wound around a plurality of support shafts including a drive shaft, a plurality of flight members attached to the endless chain. A long guide rail that supports the flight member, and configured to scrape the sludge accumulated on the bottom of the settling basin with the flight member.

  When the endless chain wound around the sprocket provided on the support shaft travels along with the rotation of the sprocket, the flight member attached to the endless chain circulates in the sedimentation basin. When the flight member moves on the guide rail installed on the bottom of the sedimentation basin, the sludge accumulated on the bottom of the pond is scraped and the flight member moves on the guide rail installed near the water surface of the sedimentation basin. The scum that floats on the surface of the water is raked.

  By the way, when a large earthquake occurs in the area where the sedimentation basin is installed, the sloshing phenomenon in which the water in the sedimentation basin is greatly swollen due to the long-period vibration caused by the earthquake, and the endless chain is detached from the sprocket of the support shaft due to the influence. The sludge scraping device may be damaged.

  Therefore, not only the new sedimentation basin but also the sludge scraping device installed in the existing sedimentation basin, in order to prevent the endless chain from detaching from the sprocket due to sloshing phenomenon etc. It has been considered that a long pressing member that prevents the flight member from floating is disposed along the extending direction of the guide rail on the side facing the guide rail.

  In Patent Document 1, guide shoes are provided on the upper and lower surfaces of the flight plate, the guide shoes engage with the guide rail, and the flight plate travels on the water surface side of the settling basin along the guide rail. The guide shoe engages with the pond bottom rail so that the flight plate travels along the pond bottom rail on the pond bottom side of the settling basin. The guard plate is arranged at a position separated from the upper side of the flight plate that has a portion bent inward and a part of the bent portion runs on the water surface side of the settling basin. A sludge scraper has been proposed.

  Patent Document 2 discloses a water surface guide rail that guides the travel of the flight movable body when the flight movable body travels on the water surface of a sedimentation basin, and the upward movement and lateral direction of the flight movable body that travels on the water surface guide rail. The water surface of the sedimentation basin is located slightly below the upper end of the flight movable body that runs on the water surface guide rail, and the guard member is above the water surface of the sedimentation basin. A sludge scraping machine has been proposed that has a structure that does not exist between the side of the flight movable body that runs on the water surface guide rail and the side wall of the settling basin. ing.

  However, the above-described conventional sludge scraper cannot reliably prevent the endless chain from being detached when the separation distance between the flight member and the guard member (holding member) is long. When the separation distance from the (holding member) is short, there is a problem that smooth travel of the endless chain is hindered due to the sliding of the flight member and the guard member (pressing member).

  Therefore, as shown in Patent Document 3, the applicant of the present application is provided with a long holding member that prevents the flight member from floating, and the separation distance h1 between the flight member and the holding member is such that the valley portion and the mountain portion of the sprocket are separated from each other. It is proposed that it is preferable to set a range of 0.25H ≦ h1 ≦ 0.75H with respect to the maximum height H.

JP 2006-326383 A Japanese Patent No. 5065513 JP 2014-128750 A

  Based on Patent Document 3, not only a new sedimentation basin but also a sludge scraping device installed in an existing sedimentation basin can be positioned and constructed with high accuracy by preventing the flight member from floating. .

  However, the direction and magnitude of the flight member displacement associated with the sloshing phenomenon is difficult to predict, and as disclosed in Patent Document 3, the numerical value of the vertical displacement of the flight member that easily causes the chain to be detached from the sprocket. Not only is regulation sufficient, but numerical regulation for lateral displacement has been desired.

  In view of the above-mentioned problems, the object of the present invention is to clarify the positional restriction standard for the relative displacement of the flight member and the presser member in the lateral direction, to enhance the rolling suppression effect by sloshing, and to support the support mechanism. It is in providing a sludge scraping device with good workability when installing.

  In order to achieve the above-mentioned object, the first characteristic configuration of the sludge scraping device according to the present invention is rotatably supported on the left and right side wall portions of the settling basin as described in claim 1 of the claims. A pair of endless chains wound around a plurality of spindles, a plurality of flight members attached to the endless chain, and a guide shoe provided in the flight member that moves as the endless chain travels A sludge scraping device that scrapes sludge accumulated on the bottom of a pond with the flight member, the left and right side walls of the flight member traveling on the guide rail. A lateral holding member that prevents movement toward the portion is disposed so as to sandwich the flight member along the extending direction of the guide rail, and the sliding allowable width of the guide shoe L, where r is the sliding rail width of the guide rail, the distance d between the opposing end surface of the flight member facing the lateral pressing member and the lateral pressing member is the width of the guide rail and the guide shoe. The position is set in the range of (L−r) / 2 <d <(L + r) / 2 with reference to the position of the facing end surface when the direction centers coincide.

  The flight member that moves as the endless chain travels is assembled so that the center of the guide shoe in the width direction coincides with the center of the guide rail in the width direction. The center of the guide shoe in the width direction and the center of the guide rail in the width direction may deviate due to different effects on the left and right. In such a case, if the side presser member abuts against the opposite end surface of the flight member, the smooth chain Driving is hindered. For this reason, the distance d between the opposed end surface of the flight member and the lateral pressing member needs to be set to (L−r) / 2 <d.

  Further, when the sloshing phenomenon appears and the guide shoe provided on the flight member is detached from the guide rail, the endless chain may be detached from the sprocket and may be seriously damaged. Therefore, it is necessary to set d <(L + r) / 2. If the distance d is set in the range of (L−r) / 2 <d <(L + r) / 2 with reference to the position of the opposite end surface when the width direction centers of the guide rail and the guide shoe coincide with each other, it is normal Sometimes, smooth travel of the endless chain and movement of the flight member are ensured, and when the sloshing phenomenon appears, it is possible to suppress the separation of the guide shoe from the guide rail and further the separation of the endless chain from the sprocket.

  As described in claim 2, the second characteristic configuration is the center in the vertical direction of the lateral pressing member when the vertical height of the opposed end surface is H, in addition to the first characteristic configuration described above. Is set so as to be located within a range of ± H / 4 from the vertical center of the opposed end face.

  If the vertical center of the lateral holding member is located within the above range, even if the vertical position of the flight member fluctuates due to wear over time of the guide shoe sliding along the guide rail, the sloshing phenomenon appears. The opposing end surface of the flight member can be reliably received by the lateral pressing member. Moreover, even if the opposing end surfaces of the lateral pressing member and the flight member collide, a local reaction force that causes damage to the flight member from the lateral pressing member is not applied, and sufficient reliability can be ensured.

  In the third feature configuration, as described in claim 3, in addition to the first or second feature configuration described above, the lateral holding member is configured by an angle member having an L-shaped cross section, and the angle member Any one of the posture in which any one of the side faces the flight member and the posture in which any one surface of the angle member faces the flight member is selected and attached. In the point.

  If any one of the L-shaped angle members is arranged so as to face the flight member, the pressure is dispersed even when the side pressing member and the end surface of the flight member come into contact with each other due to a sloshing phenomenon. Thus, even if the end surface of the flight member has a fragile structure, the risk of mechanical damage can be reduced. Further, even when the flight member slightly moves in the vertical direction, the movement of the end surface of the flight member can be reliably received. Furthermore, even if the surface of the angle member cannot be disposed so as to face the flight member due to the limitation of the installation space of the lateral holding member with respect to the flight member, for example, one end side of the L-shaped angle member Can be arranged in a posture facing the flight member.

  In addition to any one of the first to third feature configurations described above, the fourth feature configuration is the side facing the guide rail across the flight member, as described in claim 4. A vertical pressing member that prevents the flight plate from floating is disposed along the extending direction of the guide rail, and the horizontal pressing member and the vertical pressing member are fixed so as to protrude from the side wall of the settling basin. It is configured to be supported via a fixing member that fixes the lateral pressing member or the vertical pressing member, and the fixing member supports the mounting position of the horizontal pressing member or the vertical pressing member with respect to the support member. A first adjusting portion that can be adjusted along a protruding direction of the member; and a second adjusting portion that can adjust a separation distance between the flight member and the lateral pressing member or the vertical pressing member, and the fixing member. Is It lies in both of Kiyoko pressing member and the longitudinal pressing member is configured to be shared.

  At the time of construction for fixing and supporting a vertical presser member or a horizontal presser member (hereinafter simply referred to as “presser member”) to the support member fixed so as to protrude from the side wall of the settling basin, By adjusting the mounting position of the presser member with respect to the support member along the protruding direction of the support member by one adjustment unit and adjusting the separation distance between the flight member and the presser member by the second adjustment unit, The pressing member can be easily fixed at an appropriate position. In addition, the same fixing member can be used for position adjustment of both the vertical and horizontal pressing members, and it is possible to reduce the component cost by sharing.

  In addition to any one of the first to fourth characteristic configurations described above, the fifth characteristic configuration is the side facing the guide rail across the flight member, as described in claim 4. A vertical pressing member that prevents the flight plate from floating is disposed along the extending direction of the guide rail, and the horizontal pressing member and the vertical pressing member are fixed so as to protrude from the side wall of the settling basin. Supported by a fixing member that fixes the lateral pressing member or the vertical pressing member to the lateral pressing member, and the fixing member is supported by the fixing member along the extending direction of the guide rail. The presser member or the vertical presser member is provided with a third adjustment portion that can adjust the support position, and the fixing member is configured to be shared by both the horizontal presser member and the vertical presser member. .

  At the time of construction for fixing and supporting a vertical presser member or a horizontal presser member (hereinafter simply referred to as “presser member”) to the support member fixed so as to protrude from the side wall of the settling basin, By adjusting the support position of the presser member in the direction along the extending direction of the guide rail by the three adjusting portions, the presser member can be easily fixed at an appropriate position. In addition, the same fixing member can be used for position adjustment of both the vertical and horizontal pressing members, and it is possible to reduce the component cost by sharing.

  As described above, according to the present invention, the positional restriction standard for the relative displacement in the lateral direction between the flight member and the presser member is clarified to enhance the roll suppression effect due to sloshing, and the support mechanism is installed. It has become possible to provide a sludge scraping device with good workability.

(A) is a longitudinal cross-sectional view of the sludge scraping device according to the present invention installed in the sedimentation basin, (b) is scraped by each sludge scraping device shown in (a) in each sedimentation basin arranged in parallel. Sectional view of the sludge scraping device that scrapes the sludge further in one direction Explanatory drawing of the sludge scraping device by this invention (A), (b) is principal part explanatory drawing of the one end part of the flight member of a sludge scraping device. (A)-(d) is explanatory drawing of the support mechanism which fixes a pressing member. Explanatory drawing of the allowable range of the mounting position of the side presser member (A) is a partial plan view of the notch chain, (b) is a front view of the notch chain, (c) is an explanatory side view of the engagement state of the drive shaft sprocket and the notch chain, and (d) is a drive shaft sprocket and the notch chain. Plan view explanatory diagram of the meshing state of Explanatory drawing of the main part of the flight member mounting part to the notch chain Explanatory drawing of the tolerance | permissible_range of the attachment position of the horizontal pressing member which shows another embodiment FIG. 4 shows another embodiment, and (a) to (d) are explanatory views of the support mechanism according to the present invention. Explanatory drawing of the horizontal holding member which shows another embodiment (A), (b) shows another embodiment and is not provided with a vertical pressing member, and is an explanatory view of a mode of only a horizontal pressing member (A), (b) shows another embodiment and is explanatory drawing of the support mechanism which fixes a pressing member.

Hereinafter, a sludge scraping apparatus according to the present invention will be described with reference to the drawings.
As shown in FIGS. 1 (a) and 2, the sludge scraping device 2 is installed, for example, in a settling basin 1 such as a first settling basin or a final settling basin of a sewage treatment plant, and a plurality of support shafts 3a, 3b, 3c , 3d, a pair of endless chains 4 and 4, a plurality of flight members 5 attached to the endless chains 4 and 4, and a flight member 5 that moves as the endless chains 4 and 4 travel. Long guide rails 6 and 7 are provided. In this specification, the flight member 5 includes various accessory parts such as attachments for attaching the endless chains 4 and 4 to the flight plate 50.

  The four support shafts are composed of support shafts 3a and 3b arranged in the upper layer of the sedimentation basin 1 and support shafts 3c and 3d arranged in the lower layer. More specifically, a driving support shaft 3a connected by a drive motor M and a drive chain C, an idler support shaft 3b arranged at the same height as the driving support shaft 3a, a take-up support shaft 3c, It is composed of an underwater support shaft 3d and is rotatably supported by bearings disposed at both ends.

  A sprocket S is attached to each end of each support shaft 3a, 3b, 3c, 3d via a key so as to rotate integrally with each support shaft 3a, 3b, 3c, 3d. Chains 4 and 4 are wound. The driving support shaft 3a is further provided with a driving sprocket Sd for winding the driving chain C described above.

  Flight members 5 are attached to the endless chains 4 and 4 at predetermined intervals. When the driving support shaft 3a rotates, the endless chains 4 and 4 travel so as to circulate around the support shafts 3a, 3b, 3c and 3d, and the flight members 5 attached to the endless chains 4 and 4 are moved to the settling basin 1. Circulate in the interior.

  When the flight member 5 is supported by the guide rails 6 and 6 laid on the pond bottom and travels on the pond bottom side of the settling basin 1, the sludge accumulated on the pond bottom side is scraped by the flight member 5 to the sludge reservoir 1 a. Thus, when the flight member 5 is supported by the guide rails 7 and 7 installed in the upper layer and travels on the water surface side, the scum floating on the water surface is scraped to the scum skimmer 1b.

  The scum skimmer 1b includes an overflow weir that allows the scum scraped by the flight member 5 to flow into the trough, and the overflow weir is pushed down as the flight member 5 travels and floats on the water surface. The scum is configured to flow into the trough with water.

  The support shafts 3b, 3c and 3d are driven shafts, and the take-up support shaft 3c is arranged so that the position of the take-up support shaft 3c can be adjusted back and forth along the traveling direction of the flight member 5, and the tension of the endless chains 4 and 4 can be adjusted. It is configured as follows.

  The guide rails 7 and 7 installed between the support shafts 3a and 3b in the upper layer of the sedimentation basin 1 are arranged along the extending direction of the endless chains 4 and 4, and anchors are attached to the side walls 1c of the sedimentation basin 1 at predetermined intervals. It is fixedly supported by the upper part of the several rail support member 70 comprised with the corrosion-resistant steel materials fixed via (refer FIG. 3 (a), (b)).

  As shown in FIGS. 1 (a) and 1 (b), a plurality of such sedimentation basins 1 are installed in parallel, and the sludge scraped to the sludge reservoir 1a by each sludge scraping device 2 is the second sludge. It is scraped to one side of the sludge storage part 1a by the scraping device 20 and discharged by the pump P to the outside of the tank.

  Similar to the sludge scraping device 2 described above, the second sludge scraping device 20 is also attached to the pair of endless chains 24, 24 wound between the support shafts 23a, 23b, 23c and the endless chains 24, 24. And a long guide rail 27 that supports the flight plate 25 that moves as the endless chains 24 and 24 travel.

  Note that a corrosion-resistant metal such as resin or stainless steel is preferably used as the material for the endless chain 4 or the guide rail 7 described above, and wood, resin, or a corrosion-resistant metal is preferably used as the material for the flight board. In the present embodiment, stainless steel is used as the material for the endless chain 4 and the guide rail 7, and wood or resin is used as the material for the flight plate 50.

  When a large earthquake occurs in the area where the sedimentation basin 1 is installed, a sloshing phenomenon in which the water in the sedimentation basin 1 is greatly swollen due to long-period vibration due to the earthquake appears. The endless chain may be detached from the sprocket and be damaged.

  Therefore, as shown in FIGS. 1 to 4, on the side facing the guide rail 7 across the flight member 5, an elongated vertical member made of an angle member having an L-shaped cross section that prevents the flight member 5 from floating. The pressing member 8 is arranged along the extending direction of the guide rail 7 via the support mechanism 9. The vertical pressing member 8 does not have to be long, and in that case, a fixed vertical pressing member 8 may be connected.

  Further, a side presser member 8 ′ that prevents the flight member 5 traveling on the guide rail 7 from moving toward the left and right side walls 1 </ b> C is disposed so as to face the flight member 5 along the extending direction of the guide rail 7. Yes. The vertical presser member 8 and the horizontal presser member 8 ′ are supported by a support mechanism 9 formed of common parts. Hereinafter, the support mechanism for the vertical pressing member 8 will be described, and the horizontal pressing member 8 'will be described in detail.

  3 (a), 3 (b) and FIGS. 4 (a) to 4 (d), the support mechanism 9 includes a plurality of support members arranged at predetermined intervals along the extending direction of the vertical pressing member 8. 9A and a fixing member for fixing the vertical pressing member 8 so as to be supported by the supporting member 9A, that is, a first mounting member 9B and a second mounting member 9C for positioning and fixing the vertical pressing member 8 to the supporting member 9A. Yes.

  9A of support members are comprised with the corrosion-resistant steel materials fixed to the wall surface (side wall) 1c of the sedimentation basin 1 via an anchor at predetermined intervals, and are arrange | positioned so that it may protrude toward the vertical pressing member 8 side. 9 A of support members are not restricted to the aspect fixed directly to the side wall 1c, You may employ | adopt the aspect fixed indirectly. For example, the rail support member 70 described above may be bolted or welded. In the latter case, the rail support member 70 and the support member 9A are arranged in pairs on the wall surface of the sedimentation basin 1 with a predetermined interval. Even if the support member 9A is directly fixed to the side wall 1c, the support members 9A may be installed at the same interval as the rail support member 70.

  The first attachment member 9B and the second attachment member 9C include a first adjustment portion that can adjust the attachment position of the longitudinal holding member 8 with respect to the support member 9 along the protruding direction of the support member 9, the flight member 5, and the longitudinal holding member. A second adjustment portion that can adjust the separation distance h1 from the second adjustment portion, and a third adjustment portion that can adjust the support position of the vertical pressing member 5 supported by the fixing member along the extending direction of the guide rail 7. Yes.

  The first mounting member 9B is composed of a plate-shaped steel material having a “T” shape in cross-sectional view, and is in the longitudinal direction of the rectangular plate-shaped steel material serving as the upper side, that is, in a direction perpendicular to the extending direction of the guide rail in plan view Long holes 91h are formed at two locations along the extending plate steel. The bolt 91a is inserted into the attachment hole formed in the support member 9A and the long hole 91h, and is fastened and fixed by the nut 91b. That is, the 1st adjustment part 91 is comprised by the long hole 91h, the volt | bolt 91a, and the nut 91b.

  9C of 2nd attachment members are comprised with the plate-shaped steel materials bent, and the engaging part 92a engaged with the one side end of the vertical pressing member 8 of a cross sectional view "L" shape, and the engaging part 92a With the vertical pressing member 8 sandwiched between the first mounting member 9B, the distance h1 between the flight member 5 and the vertical pressing member 8 and the support for the first mounting member 9B with respect to the extending direction of the vertical pressing member 8 And a fixing portion 92b that is fastened to the first attachment portion 9B so that the position can be adjusted.

  Of the first mounting member 9B, a long hole 92h extending in the vertical direction is formed in the hanging portion to which the fixing portion 92b is attached, and the long hole 92h formed in the first mounting member 9B and the attachment formed in the fixing portion 92b. Bolts 92c are inserted into the holes and fixed with nuts 92d. That is, the second adjustment portion 92 is configured by the long hole 92h, the bolt 92a, and the nut 92b, and the third adjustment portion is configured by the engagement portion 92a that sandwiches the vertical pressing member 8 and the first attachment member 9B. FIG. 4 (d) shows an example in which one long hole 92h is formed, but actually two long holes 92h are formed in the width direction.

  After directly or indirectly fixing the support member 9A to the wall portion of the sedimentation basin 1 so as to protrude toward the vertical presser member 8, the vertical presser member 8 faces the flight member 5 via the first adjustment portion 91. The first attachment member 9B is fixed to the support member 9A while being adjusted to the position, and further, the second adjustment portion 92 is moved while the longitudinal pressing member 8 is slid relative to the second attachment member 9C via the third adjustment portion. The second mounting member 9C may be fixed to the first mounting member 9B after adjusting the separation distance h1 between the flight member 5 and the vertical pressing member 8 to be a predetermined distance via the first mounting member 9B. Even if the mounting accuracy of the supporting member 9A itself is somewhat poor, it is possible to very easily perform the construction work for fixing and supporting the vertical pressing member 8 at a desired position with high accuracy.

  Since the mounting members 9B and 9C in which the fixing mechanisms 91 and 92 are prepared in advance are used so that the relative positions of both members to be tightened can be easily adjusted via the long holes 91h and 92h, the support member 9A Even if the mounting accuracy is somewhat reduced, it can be fastened with bolts and nuts immediately after positioning and positioning with high accuracy, and can be flexibly handled on site.

  Even if the vertical pressing member 8 is formed of a long and heavy angle member, the first mounting portion is engaged by engaging the engaging portion 92a of the second mounting member 9C with one side end of the vertical pressing member 8. The vertical holding member 8 is sandwiched between the first mounting member 9B and the fixing portion 92b adjusted so that the separation distance h1 is a predetermined distance via the second fixing mechanism 92. Since the vertical presser member 8 can be supported while adjusting, there is no need to perform a fixing hole processing or the like on the vertical presser member 8 at the site, and the construction can be performed very easily.

  Guide shoes 5 a that slide on the guide rail 7 are attached to both upper and lower surfaces of the flight member 5, and are opposed to the guide shoe 5 b on the opposite side of the guide shoe 5 a that slides on the guide rail 7 by the support mechanism 9. The restraining member 8 is positioned. The guide shoe 5b is disposed at a position facing the guide rail 6 when the flight member 5 slides on the guide rail 6 laid on the pond bottom. The guide shoe is made of a material that is stronger than the flight member 5, such as a casting or a hard resin.

  Even if a sloshing phenomenon due to an earthquake appears and the flight member 5 moves upward, the guide shoe 5b having a certain degree of strength comes into contact with the restraining member, so that the flight member 5 having a lower strength than the guide shoe is damaged. The occurrence of such a situation can be avoided in advance. Also, if the guide shoe is damaged, it can be replaced.

The support mechanism 9 has been described above by taking the vertical pressing member 8 as an example, but the horizontal pressing member 8 ′ is also supported by the similar support mechanism 9.
FIG. 3A shows an example in which the support member of the guide rail 7 is also used as the support mechanism 9 of the lateral presser member 8 ′, and FIG. 3B shows the support mechanism 9 of the vertical presser member 8. An example is shown in which the same support member 9A is used as the support mechanism 9 of the lateral pressing member 8 '.

  In the former configuration, the positional relationship with the guide rail 7 can be accurately defined, and since the side pressing member 8 'and the fixing members 9B and 9C are located below the water surface, the flow of the scum floating on the water surface is not blocked. There is an advantage, and the latter configuration has an advantage that construction work can be performed efficiently because the attachment work of the vertical pressing member 8 and the horizontal pressing member 8 ′ can be collectively performed on the same support member 9 </ b> A.

  As shown in FIG. 5, when the sliding allowance width of the guide shoe 5a is L and the sliding rail width of the guide rail 7 is r, the side surface 51 and the opposite end face 51 of the flight member 5 facing the lateral pressing member 8 ' The distance d between the presser member 8 'and (L-r) / 2 <d <(L + r) / 2 with respect to the position of the facing end surface when the width direction centers of the guide rail 7 and the guide shoe 5a coincide. Is set to

  The sliding allowable width of the guide shoe 5a refers to the inner length of the rising portion 5c at both side edges of the guide shoe 5b. In some cases, the rising portion 5c is only on one of the side edges, and in this case, the length of the flat portion from the inside of one rising portion 5c to the other side edge is referred to.

  The flight member 5 that moves as the endless chains 4 and 4 travel is assembled so that the center in the width direction of the guide shoe 5a coincides with the center in the width direction of the guide rail 7. The center of the guide shoe 5a in the width direction and the center of the guide rail 7 in the width direction may be deviated due to the degree of expansion of the chains 4 and 4 being different on the left and right. When it comes into contact with the opposing end surface 51 of the member 5, smooth chain travel is hindered. For this reason, the distance d between the opposed end surface of the flight member and the lateral pressing member needs to be set to (L−r) / 2 <d.

  Further, when the sloshing phenomenon appears and the guide shoe 5a provided on the flight member 5 is detached from the guide rail 7, the endless chain 4 may be detached from the sprocket and may be seriously damaged. Therefore, in order to ensure that the guide shoe 5a and the guide rail 7 are in contact with each other, the maximum value of the distance d needs to be set to d <(L + r) / 2.

  If the distance d is set in the range of (L−r) / 2 <d <(L + r) / 2 with reference to the position of the opposing end surface 51 when the width direction centers of the guide rail and the guide shoe coincide with each other, Normally, smooth travel of the endless chain and movement of the flight member are ensured, and when the sloshing phenomenon appears, the guide shoe can be prevented from being detached from the guide rail, and further, the endless chain can be prevented from being detached from the sprocket.

  Further, when the vertical height of the opposed end surface 51 is H, the vertical center of the lateral pressing member 8 ′ is set to be within a range of ± H / 4 from the vertical center of the opposed end surface 51. preferable.

  If the vertical center of the lateral pressing member 8 ′ is located within the above-mentioned range, even if the vertical position of the flight member 5 varies due to wear over time of the guide shoe 5a that slides along the guide rail 7, the sloshing phenomenon When this occurs, the opposite end surface 51 of the flight member 5 is reliably received by the lateral pressing member 8 '. Further, even if the side pressing member 8 'and the opposed end surface 51 of the flight member 5 collide, a local reaction force that causes damage to the flight member 5 from the side pressing member 8' is not applied, and is sufficient. Reliable. Further, since the state in which the side presser member 8 'is immersed in water can be reliably maintained, the scum does not stick to the side presser member 8'.

  When the vertical height of the opposed end face 51 is H and the smaller value of H / 2 and (L + r) / 2 is min (H / 2, (L + r) / 2), the distance d is (L− More preferably, it is set in the range of r) / 2 <d <min (H / 2, (L + r) / 2).

  When the sloshing phenomenon appears and the flight member 5 moves horizontally in the horizontal direction, if the distance d is set in the range of d <(L + r) / 2, the guide shoe 5a is disengaged from the guide rail 7. It can be avoided. However, there is a possibility that the guide shoe 5a may be detached from the guide rail 7 when there is a change in posture in an oblique direction. In such a case, if the vertical height of the opposite end face is set to H and the range is set to d <min (H / 2, (L + r) / 2), it is a lateral movement with a posture change in an oblique direction. Also, it is possible to effectively avoid the separation of the guide shoe from the guide rail. When the distance d is set in such a range, when the sloshing phenomenon occurs, it effectively functions when the function of suppressing the movement of the flight member 5 by the vertical pressing member 8 is impaired due to some cause.

  The vertical height of the opposed end face 51 is H, and the smaller value between the value in the range of H / 8 to 3H / 8 and (L + r) / 2 is min (H / 8-3H / 8, (L + r) / 2. ), The distance d is more preferably set in the range of (L−r) / 2 <d <min (H / 8 to 3H / 8, (L + r) / 2).

Hereinafter, another embodiment will be described.
As shown in FIGS. 6A and 6B, resin-made notch chains may be employed as the endless chains 4 and 4. The notch chain 4 is configured as an endless chain in which a plurality of link plates 41 are rotatably connected by connecting pins 40. Each link plate 41 includes a single annular portion 42 having a narrow width formed on the base end side and a pair of wide annular portions 43, 43 formed in a fork-like shape formed on the distal end side. It is integrally formed so as to be integrally connected at 44.

  In a state where the annular portion 42 of one link plate 41 is sandwiched between the annular portions 43, 43 of the other link plate 41, the connecting pin 40 is fitted so that the axial centers of the respective annular portions coincide with each other so as to be freely connected. Has been.

  A notch 45 that engages with the drive pin of the drive shaft sprocket S1 is formed in the vicinity of the annular portion 42 in the abdomen that is the lower edge of the link member 44 in a front view, and the sheave wheel S (FIG. 1) is formed on the annular portions 43 and 43 side. , 2 corresponding to the sprocket S on the driven side). An attachment seat 46 for the flight member 5 is provided on the back surface of the link member 44.

  As shown in FIGS. 6C and 6D, the drive shaft sprocket S1 has a pair of left and right disk-shaped side plates 30 and 30 connected by a support ring 31 so as to be integrally rotatable, and a plurality of drive pins 32 are connected to the side plate 30. , 30 are arranged so as to be parallel to the support ring 31. When the support ring 31 is fitted and fixed to the support shaft 3a (see FIG. 2), the drive shaft sprocket S1 rotates integrally with the support shaft 3a.

  When the notch 45 of the notch chain 4 wound around the drive shaft sprocket S1 is engaged with the drive pin 32, the notch chain 4 is sent in the rotational direction of the drive shaft sprocket S1 and travels.

  As shown in FIG. 7, the flight member 5 is attached to the notch chain 4 via attachments 52 attached to both ends of the flight plate 50. The back surface of the notch chain 4 is placed on the attachment 52, the bolt B is inserted into the pair of mounting holes 53, and the nut N is fastened and fixed.

  Guide shoes 5a and 5b are attached to the upper and lower surfaces of the attachment 52 with the notch chain 4 interposed therebetween. When the flight member 5 travels while being supported by the guide rails 7, 7 installed in the upper layer, the guide shoe 5 a slides on the guide rails 7, 7 and the guide shoe 5 b faces the presser member 8, so that the flight member The guide shoe 5b is configured to slide on the guide rails 6 and 6 when the vehicle 5 is supported by the guide rails 6 and 6 laid on the bottom of the pond.

  Similarly, in this case, the distance d between the facing end surface 51 of the flight member 5 facing the lateral pressing member 8 ′ and the lateral pressing member 8 ′ is opposite when the width direction centers of the guide rail 7 and the guide shoe 5a coincide. It is only necessary to set the range of (L−r) / 2 <d <(L + r) / 2 with respect to the end face position.

  Further, when the vertical height of the opposed end surface 51 is H, the vertical center of the lateral pressing member 8 ′ is set to be within a range of ± H / 4 from the vertical center of the opposed end surface 51. Preferably, when the vertical height of the opposed end face 51 is H and the smaller value of H / 2 and (L + r) / 2 is min (H / 2, (L + r) / 2), the distance d is ( More preferably, it is set in the range of (L−r) / 2 <d <min (H / 2, (L + r) / 2).

  The vertical height of the opposed end face 51 is H, and the smaller value between the value in the range of H / 8 to 3H / 8 and (L + r) / 2 is min (H / 8-3H / 8, (L + r) / 2. ), The distance d is more preferably set in the range of (L−r) / 2 <d <min (H / 8 to 3H / 8, (L + r) / 2).

  FIG. 7 shows an example in which the rising portions 5c at the side edges of the guide shoe 5a and the guide shoe 5b are formed on only one side. As already described, the allowable sliding width of the guide shoe 5a refers to the length of the flat portion from the inside of one rising portion 5c to the other side edge.

  As shown in FIGS. 7 and 8A, 8B, any one of the three end surfaces denoted by reference numerals 51A, 51B, and 51C can be selected as the facing end surface 51 that faces the lateral pressing member 8 '. . Any of these may be selected, but it is preferable to select an end face that does not cause breakage even in contact with the lateral pressing member 8 ′ in consideration of mechanical strength. Further, it is desirable to select the same end face for the left and right pairs of the flight members 5. 8 (a) and 8 (b), the horizontal holding member 8 'arranged facing the end surface 51A is shown by a solid line, and the horizontal holding member 8' arranged facing the end surfaces 51B and 51C is shown by a broken line. Yes.

  In FIG. 8A, the lateral pressing member 8 ′ is attached to the support member 70 of the guide rail 7 via the mounting members 9B and 9C. In FIG. 8B, the lateral pressing member 8 ′ is connected to the vertical pressing member 8. It is attached to the same support member 9A via attachment members 9B and 9C. The support member for attaching the lateral pressing member 8 ′ is not limited to the one indicated by the above-described symbols 9 </ b> A and 70, and may be configured to be attached to a dedicated support member. Even in this case, the same attachment members 9B and 9C are used.

The holding members 8 and 8 ′ are not limited to angle members having a “L” cross section, and may be long pipe members or flat plate members.
FIGS. 9A to 9D show the attachment structure of the pipe-like vertical presser member 8 supported by the support mechanism 9 described above.

  The longitudinal pressing member 8 is arranged along the extending direction of the guide rail, and includes a pipe member 8b that prevents the flight member 5 from floating, and a holding member 9B, 9C on the other end side that holds the pipe member 8b on one end side. It is comprised with the holding member 8a hold | maintained by. The pipe member 8b is preferably made of a corrosion-resistant metal such as stainless steel. And the same structure can be employ | adopted also for the horizontal holding member 8 '.

  In particular, when a flat plate member is used as the lateral pressing member 8 ', the tip of the lateral pressing member 8' facing the flight member 5 becomes a flat surface and faces the end surface 51 of the flight member 5, so that a sloshing phenomenon appears. Even when the side pressing member 8 'and the end surface 51 of the flight member 5 come into contact with each other with a large force, the risk that the pressure is dispersed and mechanical damage occurs can be reduced. Further, even when the flight member 5 is slightly moved in the vertical direction, the movement of the end surface 51 of the flight member 5 can be reliably received. For example, what is necessary is just to comprise so that a flat plate member may be distribute | arranged to the front-end | tip of the angle member of cross-sectional "L" shape mentioned above.

  Further, in the above-described embodiment, when the angle member having the “L” cross section is used as the lateral holding member 8 ′, the end face on the tip side of the angle member is used so as to face the flight member 5. Although an example has been described, as shown in FIG. 10, one surface of an angle member having a “L” cross section may be used so as to face the flight member 5. In particular, it is suitable for selecting an end surface that is not sufficiently strong as indicated by reference numeral 51C in FIGS. 8A and 8B as the opposed end surface 51 that faces the lateral pressing member 8 ′. In this case, although the attachment member 9C cannot be shared, the angle member can be shared.

  That is, the lateral holding member 8 ′ is formed of an angle member having an L-shaped cross section, and the posture in which one end side of the angle member faces the flight member 5, and any one surface of the angle member is the flight member 5. It is comprised so that either of the attitude | positions which oppose and can be selected and attached.

  If any one of the L-shaped angle members is arranged so as to face the flight member, the pressure is dispersed even when the side pressing member and the end surface of the flight member come into contact with each other due to a sloshing phenomenon. Thus, even if the end surface of the flight member has a fragile structure, the risk of mechanical damage can be reduced. Further, even when the flight member slightly moves in the vertical direction, the movement of the end surface of the flight member can be reliably received.

  For example, if the plane of the angle member cannot be disposed so as to face the flight member due to the restriction of the installation space of the lateral holding member with respect to the flight member, or if the strength of the flight member is sufficiently secured, the cross section L It becomes possible to arrange any one side of the letter-shaped angle member in a posture facing the flight member.

  3A and 3B, an example in which both the vertical pressing member 8 and the horizontal pressing member 8 ′ are provided has been described. However, as shown in FIGS. 11A and 11B, the vertical pressing member 8 is provided. It is also possible to have a configuration including only the lateral pressing member 8 ′ without providing the above. Similarly, the configuration described in other than FIG. 3 may be configured to include only the horizontal pressing member 8 ′ without including the vertical pressing member 8.

  12 (a) and 12 (b) show another embodiment of the attachment mechanism for the pipe member 8b that prevents the flight member 5 from floating. The vertical pressing member 8 will be described as an example, but the structure can also be applied to the horizontal pressing member 8 '. A first attachment member 9B attached to the support member 9A, a second attachment member 9C attached to the first attachment member 9B, and a holding member 8a having an arcuate cross section welded to the end of the second attachment member 9C; The peripheral surface of the pipe member 8b which becomes the vertical pressing member 8 is configured to be locked by the holding member 8a so as to be relatively slidable. Finally, the pipe member 8b and the holding member 8a are bolted.

  Between the pair of elongated holes 9h1 formed in the supporting member 9A and the elongated hole 9h2 formed in one piece across the corner of the first mounting member 9B having an L-shaped cross section, Between the pair of round holes 9h3 formed in the other piece of the first mounting member 9B and the pair of long holes 9h4 formed in the plate-like second mounting member 9C, the first mounting member 9B is bolted. The bolt is fixed.

  The long diameters of the long holes 9h1 and the long holes 9h2 are arranged in an orthogonal posture so that the first mounting member 9B can be positioned and adjusted in two directions, the extending direction of the supporting member 9A and the direction orthogonal to the extending direction. Yes. Further, the separation distance between the pipe member 8b and the flight member 5 is adjusted via the long hole 9h4. In FIGS. 12A and 12B, bolts and nuts inserted and fixed between the long holes 9h1 and 9h2 and bolts and nuts inserted and fixed between the round holes 9h3 and the long holes 9h42 are shown in FIG. It is omitted.

  In the above-described embodiment, the fixing member is capable of adjusting the mounting position of the horizontal pressing member or the vertical pressing member with respect to the supporting member along the protruding direction of the supporting member, the flight member, the horizontal pressing member, or the vertical pressing member. A second adjusting portion capable of adjusting a separation distance from the member, and a third adjusting portion capable of adjusting a supporting position of the lateral pressing member or the vertical pressing member supported by the fixing member along the extending direction of the guide rail. However, it may be a fixing member that includes only the first adjustment unit and the second adjustment unit and does not include the third adjustment unit, and includes the first adjustment unit and the second adjustment unit. Alternatively, the fixing member may include only the third adjustment unit.

  In the embodiment described above, the example in which the pressing members 8 and 8 ′ supported via the support mechanism 9 are incorporated in the sludge scraping device 2 installed in the sedimentation basin 1 has been described. It goes without saying that the holding members 8 and 8 'to be supported may be incorporated in the second sludge scraping device 20 that scrapes the sludge scraped to the sludge reservoir 1a to one side of the mud reservoir 1a. .

  FIG. 1B shows an example in which a pressing member 28 is disposed between the support shafts 23a and 23c with respect to the pair of endless chains 24 and 24 wound between the support shafts 23a, 23b and 23c. ing. The presser member 28 and the support mechanism for the presser member 28 are also the same as those described above. The endless chains 24, 24 are driven so as to run counterclockwise.

  The above-described embodiment is one aspect of the present invention, and the present invention is not limited by the description. Specific configurations and control aspects of each part can be appropriately changed and designed within the scope of the effects of the present invention. Needless to say.

1: Sedimentation basin 2: Sludge scraping device 3a, 3b, 3c, 3d: Support shaft 4: Endless chain 5: Flight member 5a, 5b: Guide shoe 50: Flight plate 51: Opposing end surface 52: Attachment 6, 7: Guide Rail 8: Vertical pressing member 8 ': Horizontal pressing member 9: Support mechanism 9A: Support member 9B: First mounting member 9C: Second mounting member 91: First adjusting unit 92: Second adjusting unit 92a, 9B: Third Adjustment section

Claims (5)

A pair of endless chains wound around a plurality of support shafts rotatably supported on the left and right side wall portions of the settling basin, a plurality of flight members attached to the endless chain, and moving as the endless chain travels A sludge scraping device for scraping sludge accumulated on a pond bottom with the flight member, comprising a long guide rail that contacts the guide shoe provided on the flight member to support the flight member,
A lateral pressing member that prevents movement of the flight member that travels on the guide rail toward the left and right side wall portions is disposed so as to face the flight member along the extending direction of the guide rail,
When the allowable sliding width of the guide shoe is L and the sliding rail width of the guide rail is r, the distance d between the facing end surface of the flight member facing the lateral pressing member and the lateral pressing member is: The sludge scraping device set in a range of (L−r) / 2 <d <(L + r) / 2 with reference to the position of the facing end surface when the width direction centers of the guide rail and the guide shoe coincide with each other .   The vertical center of the lateral pressing member is set so as to be located in a range of ± H / 4 from the vertical center of the opposing end surface, where H is the vertical height of the opposing end surface. Sludge scraping device.   The lateral holding member is composed of an angle member having an L-shaped cross section, and the posture in which any one side of the angle member is opposed to the flight member, and any one surface of the angle member is the flight member. The sludge scraping device according to claim 1 or 2, wherein the sludge scraping device is configured to be attached by selecting any of the opposing postures. On the side facing the guide rail across the flight member, a vertical pressing member that prevents the flight plate from floating is arranged along the extending direction of the guide rail,
The horizontal pressing member and the vertical pressing member are supported by a supporting member fixed so as to protrude from a side wall of the settling basin via the horizontal pressing member or a fixing member that fixes the vertical pressing member. And
The fixing member includes a first adjustment unit that can adjust a mounting position of the lateral pressing member or the vertical pressing member with respect to the supporting member along a protruding direction of the supporting member, the flight member, the lateral pressing member, or the 4. The device according to claim 1, further comprising: a second adjusting portion that can adjust a separation distance from the vertical pressing member, wherein the fixing member is configured to be shared by both the horizontal pressing member and the vertical pressing member. The sludge scraping device according to any one of the above. On the side facing the guide rail across the flight member, a vertical pressing member that prevents the flight plate from floating is arranged along the extending direction of the guide rail,
The horizontal pressing member and the vertical pressing member are supported by a supporting member fixed so as to protrude from a side wall of the settling basin via the horizontal pressing member or a fixing member that fixes the vertical pressing member. And
The fixing member includes a third adjustment portion that can adjust a supporting position of the lateral pressing member or the vertical pressing member that is supported by the fixing member along an extending direction of the guide rail, and the fixing member The sludge scraping device according to any one of claims 1 to 4, wherein the member is configured to be shared by both the lateral pressing member and the vertical pressing member.

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