JP7144084B2 - guide rail - Google Patents

Description

TECHNICAL FIELD The present invention relates to a guide rail of a raking member for raking up sludge settled in a sedimentation tank.

A so-called reciprocating type, a so-called chain flight type, and the like are known as sludge raking devices for raking the sludge settled on the bottom of a sedimentation tank to a sludge pit.

In a reciprocating sludge raking device, raking members such as scrapers and shoes are reciprocated in a direction (one side) toward a sludge pit and in a direction (other side) away from the sludge pit. As a result, the sludge settled on the bottom of the sedimentation tank is gradually drawn toward the sludge pit.

In addition, in the chain flight type sludge scraping device, a flight plate as a scraping member is attached to an endless chain partly wound around a rotating wheel such as a driving wheel or a driven wheel, and the flight plate circulates by running the endless chain. move. When the endless chain runs along the bottom of the sedimentation tank from the other side to the one side, the flight plate attached to the endless chain moves from the other side to the one side, thereby removing the sludge settled at the bottom of the tank. It is drawn towards the sludge pit. Hereinafter, the direction in which the scraper reciprocates and the direction in which the flight plate moves are sometimes referred to as moving directions.

The raking member moves while slidably contacting a guide rail fixed to the pond bottom. For example, in a reciprocating sludge scraping device, when the scraping member reciprocates, a shoe provided between the scraper and the guide rail comes into sliding contact with the guide rail. Further, in a chain flight type sludge raking device, generally, a flight plate as a raking member is in slidable contact with a guide rail.

The guide rail extends along the moving direction by arranging a plurality of elongated guide plates in series in the longitudinal direction. That is, the plurality of guide plates are arranged with their longitudinal directions aligned with the moving direction. Hereinafter, the direction orthogonal to the moving direction in the horizontal plane may be simply referred to as the orthogonal direction. The orthogonal direction is a direction orthogonal to the longitudinal direction of the arranged guide plate in the horizontal plane.

The guide plate is generally made of synthetic resin in consideration of abrasion resistance, material cost, and the like, and may be deformed in a wavy shape in the longitudinal direction due to elongation due to thermal expansion. If the guide plate is deformed into a wavy shape, only a portion of the shoe or flight plate may come into sliding contact with the guide plate, and the other portion of the shoe or flight plate may be lifted from the guide plate. Also, if only a portion of the shoe or the like is in sliding contact with the guide plate, uneven wear may occur in which that portion is worn intensively. For this reason, guide rails have been proposed that attempt to prevent the wavy deformation of the guide plate (see, for example, Patent Documents 1 and 2).

In the guide rails described in Patent Documents 1 and 2, a plurality of guide plates are arranged in a row at intervals in the longitudinal direction. As a result, a gap is formed between the guide plates, and this gap absorbs the elongation of the guide plate due to thermal expansion, thereby suppressing the wavy deformation of the guide plate.

Japanese Utility Model Publication No. 08-10351 Japanese Patent No. 3107981

By the way, the guide plate may need to be replaced.

SUMMARY OF THE INVENTION An object of the present invention is to provide a guide rail in which a guide plate is easily replaced.

The guide rail of the present invention, which solves the above objects,
A guide rail in which a plurality of removable guide plates with which a scraping member for scraping up sludge settled in a sedimentation tank is in sliding contact are arranged at intervals in the movement direction of the scraping member,
The guide plate is arranged at both ends in the movement direction, and the movement of the guide plate in the orthogonal direction is controlled from the outside of both sides of the guide plate in the orthogonal direction perpendicular to the movement direction in the horizontal plane. a detachable regulating member that regulates;
An anchor bolt is provided between the two end portions regulated by the regulating member and fixes the center portion of the guide plate in the movement direction to the bottom of the sedimentation tank.

According to the present invention, it is possible to provide a guide rail designed to facilitate replacement of the guide plate.

1 is a top plan view of a sedimentation tank in which a guide rail is installed according to an embodiment of the present invention; FIG. (a) is an enlarged view of the guide rail arranged at the bottom of the pond shown in FIG. 1, (b) is an enlarged view of the circled portion C in (a) (c) is a cross-sectional view taken along the line DD of (b), and (d) is an enlarged view of the portion E encircled in (c). It is the figure which looked at a mode that a guide plate was replaced from the side. 1. (a) is an enlarged view of a portion A encircled in FIG. 1, and (b) is a cross-sectional view taken along line BB of FIG. FIG. 5 is a diagram conceptually showing how the raking member reciprocates and its shoe slides on the guide plate of the guide rail. FIG. 6 is a diagram showing a state corresponding to FIG. 2(b) with respect to a modified example of the guide rail shown in FIGS. 1 to 5; FIG. 6 is a diagram conceptually explaining a situation in which a load is likely to be concentrated on an end portion of a guide plate in the guide rails disclosed in Patent Documents 1 and 2;

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the drawings. In this embodiment, an example in which the guide rail of the present invention is applied to a reciprocating sludge scraping device provided with a scraping member that reciprocates on the bottom of a sedimentation tank will be described.

FIG. 1 is a top plan view of a sedimentation tank 8 in which a guide rail 10 according to an embodiment of the present invention is installed. In FIG. 1, the central portion of the sedimentation tank 8 in the longitudinal direction (horizontal direction in the figure) is omitted.

The sedimentation tank 8 shown in FIG. 1 is a substantially rectangular tank in plan view surrounded by an upstream wall 8a, a downstream wall 8c, and a pair of side walls 8d. The sedimentation tank 8 receives sewage such as sewage and rainwater from a conduit (not shown), sediments sludge contained in the received sewage on the bottom 8f of the tank, and drains it from the right side in FIG.

The sedimentation tank 8 is provided with the guide rail 10, the sludge raking device 20 and the sludge pit 81 of the present embodiment. In this embodiment, three guide rails 10 extending in the longitudinal direction are provided on the bottom 8f of the sedimentation tank 8, and the sludge pit 81 is provided on the left side of the sedimentation tank 8 in FIG. Hereinafter, the left side in FIG. 1 (the direction toward the sludge pit 81) is sometimes referred to as one side, and the right side in FIG. 1 (the direction away from the sludge pit 81) is sometimes referred to as the other side. The bottom 8f of the sedimentation tank 8 is a slightly inclined surface so that the water depth of the sedimentation tank 8 increases toward one side. Also, the sludge collected in the sludge pit 81 is discharged to the outside of the sedimentation tank 8 by a sludge pump (not shown).

The sludge scraping device 20 includes a plurality of scraping members 3, a connecting member 4 connecting the plurality of scraping members 3, a driving rod 5 for reciprocating the scraping members 3, and an unillustrated driving force for applying a driving force to the driving rod 5. A driving mechanism and a fixing mechanism 7 for fixing the raking member 3 to the driving rod 5 and the connecting member 4 are provided.

The drive mechanism (not shown) includes a motor placed on the ground, a converter that converts the rotational driving force of the motor into reciprocating motion, a reciprocating rod with one end fixed to the output shaft of the converter, and a triangular link. , a triangular link (not shown) and the drive rod 5 shown in FIG. When a motor (not shown) rotates and the triangular link swings, the driving rod 5 connected to the triangular link moves between one side and the other along the guide rail 10 fixed to the pond bottom 8f. move back and forth. A plurality of raking members 3 are fixed to the driving rod 5 . As the drive rod 5 reciprocates, each raking member 3 reciprocates along the guide rail 10 between one side and the other side. The raking member 3 reciprocates in the longitudinal direction of the sedimentation tank 8, and hereinafter, the longitudinal direction may also be referred to as the moving direction. Also, the direction orthogonal to the longitudinal direction in the horizontal plane is sometimes referred to as the orthogonal direction. The orthogonal direction here corresponds to the width direction of the sedimentation tank 8 . That is, each guide rail 10 extends in the movement direction, and the three guide rails 10 are spaced apart in the orthogonal direction.

FIG. 2(a) is an enlarged view of the guide rail 10 arranged on the pond bottom 8f shown in FIG.

As shown in FIG. 2(a), the guide rail 10 has a plurality of elongated guide plates 11, and the plurality of guide plates 11 are arranged in a row at intervals in the longitudinal direction. The longitudinal direction of the guide plate 11 arranged on the pond bottom 8f corresponds to the movement direction, and the orthogonal direction of the guide plate 11 arranged on the pond bottom 8f corresponds to the width direction.

The guide plate 11 is, for example, made of ultra-high molecular weight polyethylene with a thickness of about 5 mm, and has a length of about 1500 mm in the longitudinal direction and a length of about 125 mm in the orthogonal direction. Each of the plurality of guide plates 11 is fixed to the pond bottom 8f by anchor bolts 12, and regulation members 13 are provided on both sides in the orthogonal direction at positions straddling the adjacent guide plates 11, respectively. For the anchor bolt 12, a drive-type plastic anchor or the like can be used whose tip portion expands when driven. The anchor bolt 12 is driven into the central portion of the guide plate 11 divided into three equal parts in the longitudinal direction. This allows the guide plate 11 to extend in the longitudinal direction while fixing the guide plate 11 to the pond bottom 8f. In this embodiment, the guide plate 11 is fixed by a plurality of (four in the figure) anchor bolts 12, but the guide plate 11 may be fixed by one anchor bolt 12. It is preferable that the place fixed by 12 is closer to the center in the longitudinal direction of the guide plate 11 .

FIG. 2(b) is an enlarged view of the portion C surrounded by a circle in FIG. 2(a), and FIG. FIG. 4(d) is an enlarged view of part E encircled in FIG. 4(c).

FIG. 2(b) shows an enlarged view of a portion where the ends of the guide plates 11 arranged at intervals in the longitudinal direction face each other. In the description using FIG. 2B, for convenience, the guide plate 11 on one side (left side) may be referred to as one side guide plate 11A, and the guide plate 11 on the other side (right side) may be referred to as the other side guide plate 11A. It may be referred to as plate 11B.

As shown in FIG. 2B, inclined portions 111 formed obliquely with respect to the longitudinal direction are formed at the other end of the one-side guide plate 11A and the one-side end of the other-side guide plate 11B. is provided. These opposing inclined portions 111, 111 are inclined in the same direction (downward toward one side in the drawing). C is formed. The inclination angles α of these inclined portions 111, 111 with respect to the longitudinal direction are both set to 45 degrees in this embodiment. If the inclination angle α is less than 15 degrees, processing may become difficult, such as the tip portion is likely to be chipped. be. Therefore, it is preferable to adjust the inclination angle α within a range of 15 degrees or more and 60 degrees or less. In this embodiment, the inclination angle α of the inclined portion 111 of the one-side guide plate 11A and the inclination angle α of the inclined portion 111 of the other-side guide plate 11B are set to be the same. can be different. However, if a mode in which the inclination angles α are the same is adopted, it is only necessary to cut a long plate obliquely with respect to the longitudinal direction.

The gap C is a space for absorbing the extension of the guide plate 11 in the longitudinal direction, and even if the guide plate 11 expands due to thermal expansion, the gap C prevents the guide plate 11 from deforming in a wavy shape in the longitudinal direction. can be prevented. In addition, as shown in FIG. 2(a), one end of the guide plate 11 arranged on the one side most and the other end of the guide plate 11 arranged on the other end are arranged in the longitudinal direction. However, this is because adjustment margins and the like are taken into account, and sloping portions may be provided at these end portions.

The regulating member 13 is composed of, for example, a metal fitting having a thickness of about 2 mm. It is fixed to the pond bottom 8f. Further, the restricting members 13 are arranged on both sides of the one-side guide plate 11A and the other-side guide plate 11B in the orthogonal direction. In FIG. 2C, the shoe 32, which will be described later in detail, is indicated by a chain double-dashed line, and by arranging the restricting members 13 on both sides in the orthogonal direction, a region where the shoe 32 slides on the guide plate 11 is ensured. there is As described above, according to the restricting member 13 of the present embodiment, it is possible to efficiently restrict lifting of the end portion of the guide plate 11 with a small number of parts while ensuring a region where the shoe 32 slides.

As shown in FIG. 2D, the regulating member 13 includes a body portion 131 placed on the pond bottom 8f, a side regulating portion 132 extending obliquely upward from the body portion 131, and a side regulating portion 132 extending obliquely upward from the body portion 131. and an upper restricting portion 133 extending horizontally from the upper end of the portion 132 . The upper restricting portion 133 is a portion that covers the guide plate 11 from above, and is a portion that restricts lifting of the end portion of the guide plate 11 . The side regulating portion 132 is positioned on the side of the guide plate 11 and regulates the movement of the guide plate 11 in the horizontal plane. In this embodiment, the restriction member 13 is configured such that the upper restriction portion 133 is in contact with the upper surface of the guide plate 11 , and the restriction member 13 is attached such that the side restriction portion 132 is slightly separated from the side surface of the guide plate 11 . . A regulation member 13 having a configuration in which a gap is formed between the upper regulation portion 133 and the upper surface of the guide plate 11 may be used, or the regulation member 13 may be arranged so that the lateral regulation portion 132 contacts the side surface of the guide plate 11 . 13 may be attached.

Here, if the anchor bolt 12 shown in FIG. can be omitted, and the side restricting portion 132 can be omitted. On the other hand, by fixing with one anchor bolt 12 and attaching the regulating member 13 in a state where the side regulating part 132 is separated from the side surface of the guide plate 11, a mode is adopted in which the movement of the guide plate 11 in the horizontal plane is allowed. You may According to this aspect, even if the guide plate 11 is greatly stretched and the ends of the guide plate 11 come into contact with each other, the guide plate 11 moves in the horizontal plane to prevent wavy deformation. can be done.

FIG. 3 is a side view showing how the guide plate 11 is replaced.

When the guide plate 11 is to be replaced due to damage or the like, the anchor bolts 12 are first removed as shown in FIG. 3(a). In addition, when using an anchor bolt whose fixation of the guide plate 11 is released by removing the head portion, the head portion may be removed.

Subsequently, the central portion of the guide plate 11 in the longitudinal direction is lifted, and as shown in FIG. 4B, the central portion of the guide plate 11 is bent upward. Since the guide plate 11 of this embodiment is made of ultra-high molecular weight polyethylene and has a thickness of about 5 mm, it can be easily bent.

Next, the one end portion 111 portion and the other end portion 111 portion of the curved guide plate 11 are pulled out from the restricting member 13 in order. Thereby, as shown in FIG.3(c), the guide plate 11 can be removed.

When installing a new guide plate 11, the central portion in the longitudinal direction of the guide plate is bent upward, and the end portion 111 portion on one side and the end portion 111 portion on the other side are attached to each other. are inserted into the regulating member 13 in order. As a result, the guide plate 11 is placed on the pond bottom 8f, and after adjusting the position in the longitudinal direction, the anchor bolts 12 are driven in to fix the guide plate 11 to the pond bottom 8f. When using an anchor bolt whose head is cut off, the anchor bolt 12 may be driven into a location different from the location where the head is cut off and remains in the pond bottom 8f.

In this embodiment, both ends of the guide plate 11 are held by the regulating members 13, and the anchor bolts 12 are driven in to fix the guide plate 11 to the pond bottom 8f. can be easily done. When using the guide plate 11 having high rigidity, the guide plate 11 can be replaced by removing the restricting member 13 as well.

As shown in FIG. 1, the raking members 3 are arranged at equal or substantially equal intervals in the longitudinal direction. Each raking member 3 has a scraper 31 (see FIG. 4) extending in an orthogonal direction. The stroke of the reciprocating movement of the scraping member 3 is set to a distance equal to or greater than the longitudinal interval in which the scraping member 3 is arranged. The sludge settled in the sedimentation tank 8 is gradually scraped toward the sludge pit 81 side by one stroke by the reciprocating movement of the scraping member 3 and sent into the sludge pit 81 .

The drive rod 5 is arranged in the center in the orthogonal direction and extends in the longitudinal direction. In addition, one connecting member 4 is arranged at each end in the orthogonal direction. The driving rod 5 and the connecting member 4 are made of stainless steel and have a hollow quadrangular prism shape. Moreover, each connecting member 4 extends over the entire length of the longitudinal direction along which the plurality of scraping members 3 are arranged, and the plurality of scraping members 3 are fixed by a fixing mechanism 7 . Thereby, each connecting member 4 connects all of the plurality of raking members 3 . Further, the drive rod 5 and the connecting member 4 are connected by a plurality of connecting bars 41,42. As a result, the driving force transmitted from the driving mechanism (not shown) to the driving rod 5 is efficiently transmitted to the connecting member 4, and the reciprocating movement of the driving rod 5 also causes the two connecting members 4 to reciprocate. .

FIG. 4(a) is an enlarged view of the portion A encircled in FIG. 1, and FIG. 4(b) is a cross-sectional view taken along line BB of FIG.

As shown in FIGS. 4A and 4B, the raking member 3 has a scraper 31 and a shoe 32 placed between the scraper 31 and the guide rail 10. As shown in FIGS. The scraper 31 is made of a bent stainless plate, faces one side, and scrapes the sludge that has settled on the bottom 8f of the pond to one side (sludge pit 81 side shown in FIG. 1). , and an inclined surface 312 inclined downward from the upper end portion of the raking surface 311 toward the other side.

The shoe 32 includes a fixed wall 321 standing up on one side, a sliding contact portion 322 extending from the lower end portion of the fixed wall 321 to the other side and placed on the guide plate 11, and the sliding contact portion 322. and a receiving portion 323 projecting obliquely upward on one side from the end on the other side. The shoe 32 of this embodiment is a so-called stainless casting. As shown in FIG. 4B, the sliding contact portion 322 is a portion on which the scraper 31 is placed. The sliding contact portion 322 also has a function of reducing wear on the guide plate 11 by sliding the lower surface of the sliding contact portion 322 on the guide plate 11 when the raking member 3 reciprocates. The sliding contact portion 322 is formed with a second receiving portion 322a protruding upward. do.

When the scraping member 3 moves to one side, the scraping surface 311 of the scraper 31 placed on the shoe 32 scrapes the sludge to one side. On the other hand, the inclined surface 312 is inclined toward the pond bottom 8f so that the scraper 31 tapers toward the other side. When the scraping member 3 moves to the other side, most of the sludge can be retained at the position scraped by the scraping surface 311 because the sludge rides over the inclined surface 312 .

A fixing mechanism 7 for fixing the raking member 3 to the drive rod 5 has a pair of angles 71 , 71 and a pressing member 72 . The fixing mechanism 7 for fixing the scraping member 3 to the connecting member 4 has the same structure as the fixing mechanism 7 for fixing the scraping member 3 to the drive rod 5, so the description thereof is omitted.

Each of the pair of angles 71 is an L-shaped metal fitting made of stainless steel, and is welded to both sides of the drive rod 5 in the orthogonal direction in a posture extending in the vertical direction. The pressing member 72 has a bolt 721, three nuts 722, and a cap 723, and is provided on both sides of the driving rod 5 in the orthogonal direction. The bolt 721 is inserted through the angle 71 and the fixed wall 321 of the shoe 32 with the nut 722 attached, and is fixed by the nut 722 . A cap 723 is attached to the end of the bolt 721 on the other side, and the cap 723 abuts against the raking surface 311 and presses the raking surface 311 from one side to the other side. Thereby, the raking member 3 is fixed to the driving rod 5 by the fixing mechanism 7 .

FIG. 5 conceptually shows how the raking member 3 (see FIG. 4) reciprocates and its shoe 32 slides on the guide plate 11 of the guide rail 10. As shown in FIG. 5, the guide plate 11 on one side (left side) may be referred to as the one side guide plate 11A, and the guide plate 11 on the other side (right side) may be referred to as the other side guide plate 11B. sometimes referred to as Moreover, in FIG. 5, a state in which the raking member 3 has moved to one side and the end 32a on one side of the shoe 32 has reached the gap C is indicated by a two-dot chain line, and the end 32a on one side of the shoe 32 A state in which the shoe 32 has passed through C is indicated by a solid line, and a state in which the end portion 32b on the other side of the shoe 32 has also passed through the gap C is indicated by a dashed line. When the raking member 3 moves to the other side, the end portion 32b of the shoe 32 indicated by the dashed line on the other side reaches the gap C, and the shoe 32 indicated by the solid line moves to the other side. end 32b has passed through the gap C, and the end 32a on one side of the shoe 32 indicated by the two-dot chain line also passes through the gap C. As shown in FIG.

As shown in FIG. 5, the shoe 32 passes through the gap C from the state indicated by the two-dot chain line until it moves to the state indicated by the one-dot chain line. The portion 32b also obliquely intersects the inclined portions 111 of both the one-side guide plate 11A and the other-side guide plate 11B, and the intersecting portion shifts in the longitudinal direction. As a result, the load applied to the inclined portion 111 is easily dispersed in the longitudinal direction, and contact load due to contact with the one end portion 32a of the shoe 32 is less likely to occur. As a result, wear of the end portion of the guide plate 11 can be suppressed.

Furthermore, in this embodiment, the inclined portions 111 of both the one-side guide plate 11A and the other-side guide plate 11B are inclined in the same direction, and these inclined portions 111 overlap in the orthogonal direction. As a result, while the shoe 32 is passing through the gap C, the shoe 32 can be easily positioned on both the one side guide plate 11A and the other side guide plate 11B. As a result, concentration of the load applied to the inclined portion 111 can be more efficiently avoided.

Similarly, when the shoe 32 reciprocates and moves to the other side, the load applied to the inclined portion 111 tends to be dispersed in the longitudinal direction, and a contact load is generated due to the contact with the end portion 32b of the shoe 32 on the other side. become difficult.

As described above, according to the guide rail 10 of the present embodiment, it is possible to suppress wear of the end portions of the guide plate 11 while preventing undulating deformation due to elongation of the guide plate 11 .

Next, modified examples of the guide rail 10 shown in FIGS. 1 to 5 will be described. In the modifications described below, differences from the embodiment shown in FIGS. 1 to 5 will be mainly described. , will be described with the reference numerals that have been used so far, and overlapping descriptions may be omitted.

FIG. 6 is a diagram showing a modified example of the guide rail 10 shown in FIGS. 1 to 5, corresponding to FIG. 2(b).

FIG. 6(a) shows a first modified example. In the guide rail 10 of the first modified example, each end of the guide plate 11 is provided with two sloped portions having different slope directions. Specifically, each end of the guide plate 11 has inclined portions 111a and 111b that are formed obliquely toward the other side from both sides in the orthogonal direction toward the center in the orthogonal direction. As a result, the other end of the one-side guide plate 11A is formed in a triangular protruding shape, and the one-side end of the other guide plate 11B is formed in a triangular notched shape. . As in this first modified example, a mode in which a plurality of inclined portions 111 are formed at each end of the guide plate 11 can also be adopted.

FIG. 6B shows a second modification. In the guide rail 10 of the second modification, a plurality of inclined portions 111 are formed at each end of the guide plate 11, and each end of the guide plate 11 The part is formed in a zigzag in the orthogonal direction. As a result, a zigzag gap C is formed between the one side guide plate 11A and the other side guide plate 11B.

FIG. 6(c) shows a third modification, and conceptually shows the shoe 32 in FIG. 6(c). In the above-described embodiment and this modified example, the length of the guide plate 11 in the orthogonal direction is set longer than the length of the shoe 32 in the orthogonal direction with a considerable margin. In the guide plate 11 of this modified example, an inclined portion 111 is formed in the portion where the shoe 32 slides, and an orthogonal portion 112 extending in the orthogonal direction is formed in the portion regulated by the regulating member 13 . According to this modification, the regulation of the guide plate 11 by the regulation member 13 can be made more stable. One end 32a and the other end 32b of the shoe 32 may be formed in an arc shape as indicated by a dashed line, or they may be formed obliquely with respect to the longitudinal direction as indicated by a two-dotted chain line. and may be formed in a direction intersecting the inclined portion 111 .

The present invention is not limited to the above-described embodiments, and can be modified in various ways within the scope of the claims. For example, in the present embodiment, an aspect in which the guide rail of the present invention is applied to a reciprocating sludge scraping device has been described as an example, but the guide rail of the present invention is applied to a chain flight type sludge scraping device. In this case, the flight plate comes into sliding contact with the guide rail. In addition, even if the constituent elements are included only in the description of each modification described above, the constituent elements may be applied to the embodiment and other modifications.

In addition, the first guide rail described so far has a plurality of guide plates that are in sliding contact with scraping members that scrape the sludge that has settled in the sedimentation tank, and are arranged at intervals in the longitudinal direction.
Each of the plurality of guide plates may be characterized in that an inclined portion obliquely formed with respect to the longitudinal direction is provided at an end portion in the longitudinal direction.

In the guide rails described in Patent Document 1 and Patent Document 2, since there is a gap between the guide plates, when the shoe or flight plate moves and passes through the gap, The load tends to be concentrated on the ends of the guide plate in the longitudinal direction, and shoes or the like may come into contact with these ends, resulting in the problem that the ends of the guide plate in the longitudinal direction are easily worn. Hereinafter, the end portion of the guide plate in the longitudinal direction may be referred to as the end portion of the guide plate.

FIG. 7 is a diagram conceptually explaining a situation in which the load tends to concentrate on the ends 91b and 92a of the guide plates 91 and 92 in the guide rail 90 described in Patent Documents 1 and 2. As shown in FIG. In FIG. 7, the left and right direction of the figure corresponds to the longitudinal direction of the guide plates 91 and 92 and the movement direction of the shoe 93, the left side is the direction (one side) approaching the sludge pit (not shown), and the right side is the sludge pit. , and the direction perpendicular to the paper surface is the orthogonal direction. Furthermore, in FIG. 7, the part where the guide plate 91 on one side and the guide plate 92 on the other side are connected with a gap in the longitudinal direction is viewed from the side. shows step by step how it reciprocates from one side to the other.

In FIG. 7(a), the shoe 93 moves from the other side toward the sludge pit as indicated by a thick arrow, and when viewed in the orthogonal direction, the lower end 93a of the one side moves toward the guide plate 92 on the other side. The one-dot chain line indicates the state of matching the one side end portion 92a. When the shoe 93 moves further to one side from this state, the shoe 93 protrudes from the guide plate 92 on the other side toward the one side above the gap C, and the portion positioned above the gap C gradually increases. Eventually, the one-side lower end portion 93a of the shoe 93 comes into contact with the other-side end portion 91b of the one-side guide plate 91, as indicated by the solid line. Until the shoe 93 moves from the state shown by the dashed line to the state shown by the solid line, the shoe 93 protrudes above the gap C, and the load tends to concentrate on the one end 92a of the guide plate 92 on the other side. . Further, when the one-side lower end portion 93a of the shoe 93 contacts the other-side end portion 91b of the one-side guide plate 91, an impact load is generated at the contact portion.

In FIG. 7(b), the shoe 93 has moved further to one side as indicated by the thick arrow, and the other side lower end portion 93b is slightly separated from the one side end portion 92a of the guide plate 92 on the other side. It is indicated by a dashed line. When the shoe 93 moves further to one side from this state, the shoe 93 applies a load to the other side end portion 91b of the guide plate 91 on one side, and the entire shoe 93 moves onto the guide plate 91 on the one side as indicated by the solid line. Move to a position to ride on. Thus, the load tends to concentrate on the other side end portion 91b of the guide plate 91 on one side until the shoe 93 moves from the state indicated by the dashed line to the state indicated by the solid line.

In FIG. 7(c), the shoe 93, which has moved to one side, moves from one side to the other side as indicated by the thick arrow, and when viewed in the orthogonal direction, its one side end 93b The dashed-dotted line indicates the state of matching the other side end portion 91b in . From this state, the shoe 93 moves further to the other side until the other side lower end portion 93b passes through the gap C and contacts the one side end portion 92a of the other side guide plate 92 as indicated by the solid line. 93 protrudes above the gap C, and the load tends to concentrate on the other side end portion 91b of the guide plate 91 on one side. Further, when the other side lower end portion 93b of the shoe 93 contacts the one side end portion 92a of the other side guide plate 92, an impact load is generated at this contact portion.

In FIG. 7(d), the shoe 93 moves further to the other side as indicated by the thick arrow, and the lower end 93a on one side is slightly separated from the other end 91b of the guide plate 91 on one side. It is indicated by a dashed line. From this state, the shoe 93 moves further to the other side until the one side lower end portion 93a passes through the gap C and the entire shoe 93 rides on the other side guide plate 92 as indicated by the solid line. A load tends to concentrate on one end portion 92 a of the guide plate 92 .

As described above, when the guide rails described in Patent Documents 1 and 2 are employed in a reciprocating sludge scraping device, the load is concentrated on the end portion of the guide plate when the shoe reciprocates. , this end is prone to wear. Further, when the guide rails described in Patent Document 1 and Patent Document 2 are adopted in a chain flight type sludge raking device, a flight plate instead of a shoe moves on the guide plate from the other side toward the one side. As a result, the states shown in FIGS. 7A and 7B are continued. For this reason, as in the reciprocating type, the load concentrates on the end of the guide plate, and this end tends to wear out.

On the other hand, according to the first guide rail, a device is devised to suppress wear of the end portion of the guide plate while preventing wavy deformation due to elongation of the guide plate.

In addition, the second guide rail described so far has a plurality of guide plates that are in sliding contact with scraping members that scrape the sludge settled in the sedimentation tank, and are arranged at intervals in the longitudinal direction,
each of the plurality of guide plates is provided with an inclined portion obliquely formed with respect to the longitudinal direction at an end portion in the longitudinal direction;
It is characterized by comprising detachable restricting members for restricting movement of the guide plate in the orthogonal direction from both sides of the guide plate in the orthogonal direction perpendicular to the longitudinal direction in the horizontal plane.

Here, the raking member may reciprocate in one side (direction approaching the sludge pit) and the other side (direction away from the sludge pit) at the bottom of the sedimentation tank. It may move from one side to the other. Further, the guide plate may be in slidable contact with a shoe in a reciprocating sludge scraping device, or may be in slidable contact with a flight plate in a chain flight sludge scraping device. Furthermore, the guide plate may be made of synthetic resin, and the shoe and the flight plate may be made of metal. Further, the inclined portion may be inclined at an angle of 15 degrees or more and 60 degrees or less with respect to the longitudinal direction.

According to the above-described guide rail, since the plurality of guide plates are arranged in a row with a gap in the longitudinal direction, even if the guide plates are stretched due to thermal expansion, the gaps generated between the guide plates The elongation of the guide plate is absorbed by the , and the wavy deformation of the guide plate can be suppressed. Further, since each of the plurality of guide plates has an inclined portion formed obliquely with respect to its longitudinal direction at its longitudinal end, the shoe or the flight plate may move and the guide plate may move. When passing through a gap between plates, the load is easily dispersed in the longitudinal direction by the inclined portion, and contact load due to contact with shoes or the like is less likely to occur. Thereby, abrasion of the end portion of the guide plate can be suppressed.

Further, the plurality of guide plates may be such that the inclined portions of adjacent guide plates are inclined in the same direction.

By doing this, while the shoe or the flight plate moves and passes through the gap between the guide plates, the ends of the shoe or the like are easily positioned on the guide plate when viewed in the orthogonal direction. As a result, concentration of the load applied to the end portion of the guide plate can be more efficiently avoided.

In addition, the inclined portions of the adjacent guide plates may overlap in the orthogonal direction.

Further, the regulating member may have an upper regulating portion that is disposed across the adjacent guide plates and covers the guide plates from above.

By adopting the mode in which the regulating member is provided, it is possible to prevent the guide plate from lifting with a small number of parts.

Moreover, it may have a side restricting portion located on the side of the guide plate.

By doing so, it is possible to suppress the displacement of the guide plate in the horizontal plane.

Furthermore, a fixing member may be provided for fixing the guide plate to the sedimentation tank at its central portion in the longitudinal direction.

The term "central portion" as used herein refers to a portion located in the center of the guide plate when the guide plate is divided into three equal parts in the longitudinal direction. In addition, it is preferable that the position where the guide plate is fixed to the sedimentation tank by the fixing member is closer to the center in the longitudinal direction than the central portion. Further, a plurality of fixing members may be provided in the central portion.

Employing the aspect including the fixing member facilitates allowing the guide plate to extend in the longitudinal direction while fixing the position of the guide plate.

Also, the guide rails described so far are
A guide rail in which a plurality of guide plates that are in sliding contact with scraping members that scrape up sludge settled in a sedimentation tank are arranged at intervals in the longitudinal direction,
The guide plate may be provided with detachable restricting members for restricting movement of the guide plate in the orthogonal direction from both sides of the guide plate in the orthogonal direction perpendicular to the longitudinal direction in the horizontal plane. .

The regulating member may have an upper regulating portion that is disposed across the adjacent guide plates and covers the guide plates from above.

Also, the guide rails described so far are
A guide rail in which a plurality of guide plates that are in sliding contact with scraping members that scrape up sludge settled in a sedimentation tank are arranged at intervals in the longitudinal direction,
Detachable restricting members for restricting movement of the guide plate in the orthogonal direction from both sides of the guide plate in the orthogonal direction perpendicular to the longitudinal direction in the horizontal plane,
The regulating member has an upper regulating portion arranged to straddle the adjacent guide plates and covering the guide plates from above.

The regulating member may have a side regulating portion located on the side of the guide plate.

A fixing member may be provided for fixing the guide plate to the sedimentation tank at a central portion in the longitudinal direction thereof.
Also, the guide rails described so far are
A guide rail in which a plurality of removable guide plates with which a scraping member for scraping up sludge settled in a sedimentation tank slides are arranged in a row in the direction of movement of the scraping member,
The guide plate is arranged at both ends in the movement direction, and the movement of the guide plate in the orthogonal direction is controlled from the outside of both sides of the guide plate in the orthogonal direction perpendicular to the movement direction in the horizontal plane. a detachable regulating member that regulates;
and a fixing member that is arranged between the both ends that are regulated by the regulating member and that fixes the guide plate to the sedimentation tank.
The fixing member may be arranged at a central portion of the guide plate in the moving direction.

REFERENCE SIGNS LIST 10 guide rail 11 guide plate 111 inclined portion 12 anchor bolt 13 regulating member 20 sludge raking device 3 raking member 31 scraper 32 shoe 8 sedimentation tank C gap

Claims (1)

A guide rail in which a plurality of removable guide plates with which a scraping member for scraping up sludge settled in a sedimentation tank is in sliding contact are arranged at intervals in the movement direction of the scraping member,
The guide plate is arranged at both ends in the movement direction, and the movement of the guide plate in the orthogonal direction is controlled from the outside of both sides of the guide plate in the orthogonal direction perpendicular to the movement direction in the horizontal plane. a detachable regulating member that regulates;
A guide characterized by comprising an anchor bolt that is arranged between the both ends regulated by the regulating member and fixes the central portion of the guide plate in the moving direction to the bottom of the sedimentation tank. rail.

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