JP3033482U - Sludge scraper - Google Patents

Abstract

(57) [Summary] (Correction) [Purpose] To provide a sludge attracting device capable of surely obtaining carrier-front operation even if the device is lightweight and simplified. [Structure] A carrier 9, which can travel back and forth in parallel with the bottom surface of the sludge accumulating, and a crawling posture that allows the sludge to be caught in one direction by being attached to the carrier 9 and avoiding it on the sludge. The scraper 17 that can be switched to the return posture that can pass through the sludge, the switching mechanisms 24 and 26 that switch the scraper 17, and the switching mechanisms 24 and 26,
And a drive device having a transmission member 35 that drives the carrier 9 and reciprocates the carrier 9.

Description

[Detailed description of the invention]

[0001]

[Industrial applications]

 The present invention relates to a simple sludge scraping device for scraping and removing sludge accumulated on the bottom surface of a first settling tank or a final settling tank.

[0002]

[Prior art]

 In the first or final sedimentation pond, a large amount of sediment accumulates on the bottom of the pond, so a sludge attracting device is configured to scrape and remove these sludges. The sludge scraping device is provided with a carrier that can freely reciprocate, and a blade-shaped scraper is attached to the carrier so that the sludge scraping device is vertical when scraping and horizontal when returning. This scraper is generally configured to switch before driving the carrier.

[0003]

[Problems to be solved by the invention]

 By the way, conventional sludge scrapers are large and heavy, so the scraper is activated first and then the switching is driven.However, the carrier and other devices are light and simple. In this case, the carrier may be driven first and the scraper may not switch. In order to eliminate this, the present applicant has previously proposed a device in which the scraper operates reliably. However, the certainty of such operation has become even more necessary nowadays when the simplification of the device is required. The present invention has been made to solve the above problems, and an object of the present invention is to provide a sludge attracting device capable of reliably operating the carrier ahead even if the device is lightweight and simple.

[0004]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, a device according to claim 1 is capable of traveling back and forth in parallel with a bottom surface of sludge, and a scraper that is attached to the carrier and can sludge in one direction. Scraper that can be switched to a posture and a return position that can pass over the sludge while avoiding it, a switching mechanism that switches the scraper, and a transmission that drives the switching mechanism and reciprocates the carrier. In the sludge attracting device including a driving device having a member, the switching mechanism includes a first cam provided on a driving arm supported by the carrier so as to be reciprocally rotatable, and a first cam provided on the scraper side. A second cam for switching and driving the scraper in response to the first cam. According to a second aspect of the invention, in the first aspect, one of the first and second cams is a shaft type, and the other cam is a groove type. According to a third aspect of the invention, in the first aspect, the first cam is a roller type, while the second cam is a groove type into which the first cam is movably fitted. According to a fourth aspect of the present invention, in the first aspect, the pulling posture is a substantially vertical posture, and the returning posture is a substantially horizontal posture in which the tip is raised in the returning direction. According to a fifth aspect of the present invention, in the first aspect, a guide rail is provided on the bottom surface, and the guide rail includes a plurality of guide rails. According to a sixth aspect of the invention, in the first aspect, a guide rail is provided on the bottom surface, and the guide rail is a single track. According to a seventh aspect of the present invention, in the first aspect, the first cam is a shaft type and the second cam is a groove type, and these cams are orthogonal to each other at least when the scraper is in the scraping posture. Is configured. According to an eighth aspect of the invention, in the seventh aspect, the second cam is provided with a groove at the groove end for locking the first cam. According to a ninth aspect of the invention, in the first aspect, the support shaft of the drive arm and the support shaft of the scraper are arranged in a front-rear relationship. According to a tenth aspect of the invention, in the first aspect, the support shaft of the drive arm and the support shaft of the scraper are arranged in a vertical relationship.

[0005]

A switching mechanism includes a first cam provided on a drive arm rotatably supported by a carrier and a second cam provided on the scraper side and switchingly driving the scraper in response to the first cam. Since it is equipped with and, the force from the drive unit can be boosted to drive the scraper switching, which ensures that the scraper switching operation precedes the drive of the carrier and uses the cam. This simplifies the structure of the device.

[0006]

【Example】

 Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments. 1 to 4 show an embodiment of the present invention. In these figures, 1 is a rectangular sedimentation basin, and this sedimentation basin 1 is provided with side walls 2 and 2 facing left and right as shown in FIG. Thus, the end wall 4 is provided. The four sides of the bottom painting 3 are provided with slanted walls 5. 8 is a pit.

On the bottom surface 3, two left and right lower guide rails 7 are laid as existing ones. The lower guide rail 7 may be a newly installed one or a newly installed single track type. Further, the lower guide rail 7 itself is not essential to this invention.

Reference numeral 9 denotes a carrier, and the carrier 9 includes a rectangular seat plate 10, and four traveling rollers 11 ... Are attached to the bottom portion of the seat plate 10 via brackets 12 to form the lower guide rail. 7 is reciprocally movable on the upper guide rail 13 made of a U-shaped channel material fixed along the upper side, and the side roller 14 provided on the bracket 12 is arranged along the groove of the upper guide rail 13 Exercise to regulate the movement of the device from side to side and up and down.

Two bearings 15 on the left and right are mounted on the carrier 9, and a rotary glaze 16 is provided so as to extend horizontally to the left and right through these carriers 9. A scraper 17 is attached to each of the left and right sides of the rotary shaft 16.

The scraper 17 is composed of a mounting plate and a rubber scraping plate at its tip, and can be switched between a vertical scraping posture and a horizontal returning posture. In the approaching position, the stoppers 18 extending from both sides of the carrier 9 are fixed. A stopper for the return posture may be provided.

A bracket 19 is fixed on the carrier 9 at a position in front of the bearing 15, and the bracket 19 has a width at a position between the bearings 15 when viewed from the front as shown in FIG. With narrow opposing plates. A drive arm 20 is rotatably supported by a support shaft 21 on the bracket 19, and the drive arm 20 is an L-shaped arm having a long upper arm portion 20a and a short lower arm portion 20b at its lower end.

The tip of the lower arm portion 20 a is bifurcated, and as shown in FIG. 4, a first cam 24 composed of a first cam shaft 22 and a first cam roller 23 is formed at the tip. On the other hand, a driven arm 27 having an elongated second cam 26 projects from an intermediate portion of the rotary shaft 16. In the scraping position of the scraper 17, the lower arm portion 20b is slanted backward by 45 ° and the driven arm 27 is slanted forward by 45 ° so that the first cam and the second cam are in a reverse V shape and are orthogonal to each other. On the other hand, when the scraper 17 is in the returning posture, the arms 20a and 27 rotate downward to form a V shape, and the arm 20a is slanted backward to 45 °, and the arm 27 is moved downward. It becomes 45 ° diagonally down front.

On the other hand, a joint 30 is rotatably attached to the tip of the drive arm 20 via a shaft 29, a rod 31 is passed through the joint 30, and a spring 32 is mounted on the rod 31. There is. Further, wire ropes (transmission members) 35 are connected to both ends of the rod 31 via rotary joints 33, respectively. The wire rope 35 is guided upward through a sheave 37 attached so as to face the end wall 4, and can be connected to a drive source (driving device) of Ikegami through a sheave provided above. It is connected. When the wire rope 35 is driven leftward in FIG. 1 by the drive source, the wire rope 35 is moved toward the scratching direction, and when driven rightward, the wire rope 35 is returned to the returning direction.

The sludge attracting device configured as described above operates as follows. The solid lines in FIGS. 1 to 4 show the case of the scratched state. In this state, the wire rope 35 is pulled to the left in FIG. 1, so that the drive arm 20 moves forward and diagonally upward as shown by arrow A. With the 45 ° state, the first cam 24 is lifted and the driven arm 27 is lifted, and both arms 24, 27 are in the orthogonal state. Then, the driven arm 27 causes the scraper 17 to rotate in the direction of the arrow A to be vertically lowered, and is surely stopped by the stopper 18 to be in the scraping posture.

In this approaching posture, the rotation moment of the drive arm 20 acts on the two cams 24, 26 several times, and a large force is exerted. As a result, the scraper 17 is rotated by a large force before the carrier 9 travels. In consideration of that point, for example, the scraper 17 is set to be short and the heights of the rotary shaft 16 and the support shaft 21 are set low (for example, below the seat plate 10 as shown in FIG. 5). Therefore, the rotation resistance can be reduced and the scraper 17 can be more reliably rotated. On the other hand, if the drive arm 20 is made as long as possible, the rotational moment becomes large.

As a result, the carrier 9 advances in the direction of the arrow X while dropping the sludge in the approaching posture and drops it into the pit 8. At the time of this scraping, the scraper 17 generates a resistance force due to sludge and lifts in the direction of arrow B, but this lifting is blocked by the engagement lock of the two cams 24 and 26. That is, as shown in FIG. 4, the downward rotation applied from the scraper 17 to the driven arm 27 is locked by fitting the first cam 24 into the recess 26 a formed at the groove end of the second cam 26. An auxiliary plate 38 whose position can be adjusted with a bolt 37 is attached so that the locking condition can be adjusted. The auxiliary plate 38 has, for example, a bolt through hole formed in the plate 38 so as to be adjustable and movable in a plane in multiple directions.

On the other hand, when the scraper 17 drops sludge into the pit 8, the drive source rotates in the reverse direction and the wire rope 35 is pulled leftward, whereby the drive arm 20 moves in the direction of arrow B in FIG. The scraper 17 is rotated in the same direction to interlock the scraper 17 in the return direction which is the same as the B direction via the driven arm 27. The scraper 17 becomes horizontal, and as shown in phantom in FIG. 4, even if the scraper 17 lowers, it is blocked as a result of the first cam 24 being locked in the recess 26a. In addition to the recess 26a, the spool may be locked in the recess 26a with a spring capable of advancing and retracting. This spool-type locking system can be constructed either alone or in combination with the recess 26a as described above.

Since the scraper 17 returns horizontally, as shown in FIG. 1, even the deposits accumulated on the end wall 4 at the return end are scooped when rotating in the direction of arrow A. For that purpose, the scraper 17 is preferably located at the rear end of the carrier 9 in FIG. This is taken into consideration in the embodiment shown in FIG. In this case, the driven arm 27 is arranged around the traveling roller 11, and the support shaft 21 of the drive arm 20 is also arranged in the bottom space of the carrier 9. In this embodiment, a groove 34 is formed in the rear portion of the carrier 9 in the front-rear direction, and the drive arm 20 is operated through the groove 34. Further, as shown by the phantom line, the scraper 17 may interfere when the drive arm 20 is in the returning posture, and in consideration of this, a vertical slit or the like is formed in the scraper 17 and its bracket 17a. . In the embodiment shown in FIGS. 1 and 5, the carrier 9 is shortened as much as possible. In addition, the scraper 17 may be configured such that the returning posture is in a forward rising state. Furthermore, the scraper 17 may have a slightly downward shape even if it does not become horizontal when returning.

6 and 7 show another embodiment. In this embodiment, as shown in FIG. 7, an inverted T-shaped guide rail 40 is fixed by a single track in the center of the width of the pond, and an auxiliary rail 41 is attached to the upper end of the guide rail 40. Has been. 42 is a traveling roller that travels along the auxiliary rail 41, and the roller 42 is composed of two discs facing left and right, through which a rotary shaft 43 is passed, so that both rollers 42 move to the left and right. On the other hand, relative rotation is possible around the rotation shaft 43 so that the rotation shaft 43 is always in the same position.

Reference numeral 44 denotes a carrier. The carrier 44 has a rotary shaft 43 inserted and supported, and a pair of guide rollers 45 is attached to the front and rear ends of the carrier so as to move along the auxiliary rail 41. A bracket 46 is erected on the carrier 44, a support shaft 47 is inserted between them, and a drive arm 48 is attached. The drive arm 48 is composed of an upper arm portion 48a and a lower arm portion 48b. A first cam 50 is attached to the arm portion 48b and a second cam 51 is attached to the rotary shaft 43 so as to mesh with each other. A scraper 52 is attached to the rotary shaft 43.

As shown in FIG. 7, auxiliary rollers 53 may be arranged on both sides of the rotary shaft 43 to stabilize the drive. The roller 53 may be directly rolled on the bottom surface or may be guided by the horizontal rail 54 as indicated by an imaginary line. Furthermore, the rotary shaft 43 and the scraper 52 can be configured to be even longer as indicated by an imaginary line.

FIG. 8 shows an additional proposal example. As shown in the figure, the sludge attracting device as in the above embodiment is constructed in the pond, and the device is equipped with a drive arm 56 and is driven forward and backward by a wire rope 57. The wire rope 57 is reciprocally driven by a drive source 59 via a sheave 58. An actuating lever 60 consisting of a left and right type is pivotally attached to the drive arm 56 so as to be rotatable back and forth, and a roller 61 is attached to the upper end of the lever 60 on the above-mentioned returning surface. A float 62 is axially fixed to the upper end of the lever 60 so as to be rotatable back and forth.

On the other hand, at the water level of the pond, a fixed trough 64 is provided so as to extend over the width of the pond, and a hollow weir 66 capable of floating up and down is attached via a rotary shaft 65 at the front of the trough 64. It has been burned. An L-shaped engagement piece 68 is attached to the bottom surface of the weir 66 via a shaft 67, and only the tip of the engagement piece 68 is uniquely formed around a shaft 69 against a spring as a virtual line. It is supposed to turn.

When the drive arm 56 is pulled by the wire rope 57 in the returning direction which is the leftward direction and returns, the operating lever 60 thereon is returned by the float 62 while being kept vertical. When the float 62 comes to the front of the trough 64 as shown by the solid line in the figure, the front roller 61 pulls down the weir 66 because the spring works while hooking the engaging piece 68. As a result, the scum passes over the weir 66 and is introduced into the trough 61. The weir 66 is locked by a stopper (not shown) at a certain sinking angle, and then only the tip of the engaging piece 68 is bent downward as the roller 61 advances.

As a result, the roller 61 moves under the engaging piece 68, and performs a predetermined movement to the right end of the pond together with the sludge attracting device. As a result, the float 62 floats by its own buoyancy (or with the returning force of the balancer), and the introduction of scum is stopped. Even if the sludge attracting device is switched to the attracting direction and the float 62 or the operating lever 60 hits the engaging piece 68, these escape to the rear and get over.

This example is also applicable to the case where the trough 64 has a cylindrical shape as indicated by an arrow, and also to the case where the cylindrical trough rotates back and forth around the axis. Further, as shown in phantom on the left side of the drawing, the sheave 58 may be supported by a bendable bracket 70 and a step 71, and the stay 71 may be lifted up to the pond by removing the bolt 72. By adopting this configuration on the right side as well, maintenance of the sheave is possible without draining water. Also, it may be indicated by a virtual line on the right side of the drawing. That is, a guide 75 having a long hole 74 at the top and bottom is fixed to the pond wall, and a shaft 77 that can be moved vertically by a handle 76 is provided along the guide 75 so that the shaft tip of the shaft 77 lightly presses the shaft of the sheave 58. I am doing it. Then, when the handle 76 is turned to raise the shaft 77, the sheave 58 is released and can be lifted by the wire rope 57. A bearing for the sheave 58 may be provided at the tip of the shaft 77. Further, as shown in the center of the drawing, the hook 80 may be suspended and the sludge attracting device may be entirely lifted above the pond by the hook 80. Further, as indicated by a black circle (bolt) 81, the operating lever 60 may be vertically separable at this point.

The driving method shown in FIG. 9 can be adopted. In this system, a moving sheave 200 is attached to the tip of the drive arm 20, a rope 201 is hung on this, one end is stopped at a fixed point 203 on the Ikegami via a sheave 202, and the other end is a bidirectional drum (via a sheave 204). It is wound around the drive part) 205. The drum 205 includes two grooves having different groove orientations on the left and right sides. On the other hand, another rope 210 is hung on another moving sheave 200 adjacent to the moving sheave 200, and the base end of the rope 210 is stopped at a fixed point 213 with a spring 211 and a load meter 212 on the Ikegami spring, and the other end is It is wound around the other winding groove of the drum 205 via the sheaves 214 and 215. The rotation of the drum 205 in the X direction causes the carrier 9 to return in the X direction via the moving sheave 200, and the rotation of the drum 205 in the Y direction causes the carrier 9 to return in the Y direction via the moving sheave 200. Here, the rope can be replaced by connecting the replacement rope 220 to the end of the fixed point 203 of the rope 201 and rotating the drum 205 in the X direction, while connecting the replacement rope to the fixed point 213 and moving the drum 205 in the Y direction. If you rotate it, you can replace the rope on the right side of the figure. The sheave 200 operates at 1/2 power.

FIGS. 10 to 13 show an embodiment of a cam interlocking type, FIG. 10 is an overall vertical sectional view of a sludge basin equipped with the sludge attracting device according to the present invention, and FIG. 11 is a plan view thereof. FIG. 12 is a side view showing details of the sludge attracting device, and FIG. 13 is a front view thereof.

As shown in FIG. 11, the sedimentation pond is provided with left and right side walls 101, and is provided with end walls 102 and straightening walls 103 shown in FIG. 10 so as to be orthogonal to these side walls 101. doing. Then, as shown in FIG. 10, a pit 105 is formed at one end of the bottom wall 104 for sludge to flow down and be pumped up.

A water surface 106 is set above the pond, and an overflow weir 107 is arranged along the side wall 101 so as to correspond to the water surface 106, so that the scum can be swallowed. Further, an upper pit 108 is formed above the sedimentation pond. In such a sedimentation pond, as shown in Fig. 101, one unit has two system paths on the left and right, and a large number of these units are arranged.

In each sedimentation basin, a guide rail 109 is fixed on the bottom wall 104 so as to pass through the center of each passage to form a single track type. This guide rail 109 is fixed to the H-shaped steel by an anchor so that the flanges are vertically arranged, and extends from the end wall 102 side shown in FIG. 10 to above the pit 105, as shown in the cross section in FIG.

The sludge attracting device includes an underframe-shaped carrier 111 as shown in FIGS. 12 and 13. The carrier 111 has a pair of front and rear main rollers 112 that roll on the guide rails 109, an upper side roller 113 that advances by hitting a flange edge, and a lower side roller 114 that advances by hitting a web and also functions as a retainer. On the carrier 111, a front bearing 115 is mounted on the left side of FIG. 12, which is on the scraping side, and a rear bearing 116 is mounted on the right side, and the front bearing 115 is provided with an L-shaped drive arm 117. An interlocking arm 118 is rotatably supported on the rear bearing 116.

The drive arm 117 is formed of a long side portion and a short side portion, and the long side portion was tilted forward and up when crawling, but swings about 90 degrees when not crawling and diagonally moves backward. Become. The short side is at a right angle to the long side, and the one that was obliquely upward and rearward at the time of scratching is rotated 90 degrees downward. An upper stop piece 120 and a lower stop piece 121 are attached to the upper ends of the long sides of the drive arm 117, and as shown in FIG. 11, between the upper stop pieces 120 of the sludge attracting device equipped on the 2nd system path, there is an end. The two sheaves 122 fixed to the wall 102 are connected by a wire rope (transmission means) 123.

On the pond, a pair of drums 125 are installed according to each system path, and one of them is equipped with a drive source 126. As shown in FIG. 10, the wire rope 123 from the drum 125 is connected to the sheave 122. It is fixed to the lower stopper 121 through the. As shown in FIG. 11, the other drum 125 is connected to a lower stopper piece 121 of a device that travels on another path via a sheave 122. A sprocket and a chain 127 interlock between the two drums 125.

On the other hand, a long hole-shaped first cam 129 is formed on the short side portion of the drive arm 117, and a pin-shaped second cam 130 with a roller provided at the tip of the interlocking arm 118 is rolled. It is movably engaged. The first and second cams 129 and 130 form a switching mechanism. Both center lines of the short side portion and the interlocking arm 118 make an angle of less than 90 at the time of scratching, and the same angle at the time of not scratching.

Other main bearings 132 are arranged on both sides of the rear bearing 116, and a horizontally elongated scraper support shaft 133 is rotatably attached to these. A mounting plate 134 is fixed to the support shaft 133 so as to be separated from each other on the left and right, and a scraper 136 is provided on the mounting plate 134 via a pair of left and right back plates 135. This scraper 136 is provided in a pair on the left and right, and they simultaneously act in the same direction. A guide roller 137 is arranged behind the scraper 136 so as to form a pair of left and right.

This sludge attracting device operates as follows. The state shown by the solid lines in FIGS. 10 to 13 is in the scratched state (posture), and as shown in FIG. 12, the drive arm 117 is the wire rope 123 that is wound around the drum 125 by the drive of the drive source 126. The drive arm 117 is slanted forward in the scraping direction as shown by the direction arrow X, and the interlocking arm 118 is lifted up, whereby the scraper 136 is lowered to be a vertical surface, and the stopper 138. And proceed in the X direction while maintaining the same vertical state. In this case, the second cam 130 is locked in the tip of the first cam 129.

As shown in FIG. 11, in the sludge attracting device of the adjacent other system road, the drive arm 117 is pulled in the opposite direction by the wire rope 123, so that the scraper 136 gets up and is in the returning posture. When the sludge scraping apparatus of FIG. 10 advances in the X direction and reaches the top of the pit 105, the sludge scraped by the scraper 136 is made to flow down into the pit 105. After that, the drive source 126 is rotated in the reverse direction, and the other drum 125 is rotationally interlocked from the drum 125 via the chain 127, so that the drive source 126 is returned to the return posture. This return posture is controlled so that the wire rope 123 is pulled in the direction of the imaginary line arrow Y in FIG. That is, when the wire rope 123 is pulled in the Y direction, the drive arm 17 rotates about 90 degrees in the same direction, and the state shown by the phantom line in FIG. 10 is obtained. As a result, the first cam 129 rolls the second cam 130 to rotate the interlocking arm 118 downward, and the scraper 136 is lifted to a substantially horizontal state.

In this case, in the switching mechanism, as shown in FIG. 12, the pulling force of the wire rope 123 acts on the tip of the long drive arm 117, and the large rotation moment is used as the short arm. Since the cams 129 and 130 convert smoothly, a large rotational force is generated in the scraper 136, the scraper 136 is activated first, and then the carrier 111 is driven for traveling.

As shown in phantom lines in FIG. 10, when the sludge attracting device returns to the vicinity of the end wall 102, the drive source 126 rotates in the reverse direction and the other wire rope 123 is pulled in the X direction, and The reverse operation is performed and the scraper 136 is in a vertical approaching position.

As shown in FIGS. 12 and 13, a pantograph 141 that can be moved up and down along a guide column 140 is provided on the carrier 111. The pantograph 141 has a scum scraping plate 142 at the upper end. In preparation, the scum floating on the water surface 106 in FIG. 10 is scraped in one direction. This scraping is performed while the sludge scraping device is in the returning posture, but in order to avoid hitting the upper pit 108, the scraping is performed before the pit 108. Therefore, when shifting from the approaching posture to the returning posture, the conversion lever 143 is kicked by a stopper (not shown) and rotated by the force of the weight 144 in the clockwise direction in the figure. Along with this, the kick-up lever 145 provided coaxially kicks up the projection 146 of the pantograph 141, so that the pantograph 141 is extended upward. Stopping at this time is performed by the stopper 147.

In that state, the scraping plate 142 scrapes the scum, but when approaching the upper pit 108, a locking projection (not shown) hits the conversion lever 143, so that the lever 143 is tilted in the scraping direction. As a result, the kick-up lever 145 is pulled down, and the pan tag ruff 141 is also lowered to proceed in the returning direction without being hit by the pit 108 and driven in the scraping direction. This scum attracting device may be based on a lifting mechanism other than the pantograph 141. On the other hand, the scum scraping device may not be included in the sludge scraping device. The sludge attracting device may be configured such that the wire rope can be reciprocally driven by disposing drive sources in the longitudinal direction of the pond. The guide rail is a single-track type, but the single-rail type also includes a guide rail that is composed of a plurality of adjacent rails that constitutes one unit. In the first and second cams 129 and 130, for example, the first cam 129 may have a shaft shape and the second cam 130 may have a groove shape. Further, a piece with a through hole is provided at the upper end of the drive arm 117, and the wire rope 123 can normally pass through the piece, but in the event of an emergency such as a failure, the pad attached to the wire rope 123 to be separately driven. The device can be lifted above the pond by hitting the piece 139 and pulling the entire device in the direction of the arrow Y. In this case, the drive wire rope 123 is normally loosened, and the emergency wire rope 123 is lifted on other tracks.

The embodiment shown in FIGS. 14 and 15 is a sludge attracting device whose drive source is an underwater motor 150. A single track type guide rail 109 is laid on the bottom wall 104 of the pond, and the guide rail 109 is made of H-shaped steel with laterally oriented grooves. The carrier 152 can be reciprocally driven so that it can roll. An underwater motor 150 with a speed reducer is mounted on the carrier 152, and a drive sprocket 153 is provided on one side of the motor 150. On the guide rail 109, a chain 155, one of which is pulled by a tension mechanism 154 and the other of which is fixed, is stretched in parallel and hung between them. It should be noted that other linear material of the chain, for example, wire rope or belt (including timing belt) may be used.

The chain 155 to the drive sprocket 153 passes through a pair of front and rear idlers 156. As shown in FIG. 14, a power distribution cord 157 is connected to the submersible motor 150 between it and Ikegami. In addition, a long scraper support shaft 158 and a short machine shaft 159 are rotatably provided in front of and behind the carrier 152. A scraper 161 is attached to the support shaft 158 and the front link 162 extends upward to extend the machine shaft. The rear link 163 also extends from 159. The scraper 161 extends from the scraper support shaft 158 obliquely rearward and extremely low, and its rear end is semicylindrical and has a drain hole 164 formed in its upper surface as shown in FIG. A guide roller 165 is arranged behind the scraper 161. The lower limit of the scraper 161 is defined by the stopper 166.

The front and rear links 162 and 163 are connected by an interlocking link 167, and a weight 168 is provided at the rear part. The scraper support shaft 158 has a pair of left and right levers 170 having a cam roller 169 at the tip thereof, and a contact plate 171 provided so as to face the scraping direction of the cam roller 169, and a scraper 161. A swash plate cam 172 is provided at the other end so that the roller 165 can be guided while hitting.

The submersible motor 150 is rotationally driven in the forward and reverse directions, and the drive in the forward direction brings the apparatus into the closed state shown by the solid lines in FIGS. 14 and 15. In the scratched state, the drive sprocket 153 rotates to cause the carrier 152 to travel along the specified chain 155. At this time, the links 162 and 163 are urged by the weight 168 to rotate clockwise in FIG. 14, and the scraper 161 is also urged in the same direction, so that the guide rollers 165 and the stoppers 166 scrape along the bottom wall 104. proceed. The rear end of the scraper 161 may be arranged further rearward, as shown by a virtual line in FIG.

As the sludge is released from the scraper 161 by advancing the device and corresponding to the pit 105, the cam roller 169 immediately hits the contact plate 171, whereby the links 162, 163 move forward. While swinging, the weight 168 also moves forward. Since the lever 170 is stopped by the stopper 173, the scraper 161 also stops when the virtual line in FIG. 14 is lifted. When the submersible motor 150 starts reverse rotation, the device starts returning and is returned to the end of the guide rail 109. Here, the lifted guide roller 165 hits the swash plate cam 172 and is guided downward, whereby the links 162, 163 and the weight 168 move rearward and the scraper 161 is lowered to the scratched state. To be The cam roller 169 at the front end also returns to the original forward direction and becomes in a state of scratching. It should be noted that the guide rails of the embodiment may be plural.

The embodiment of FIG. 16 shows a sludge attracting device which may constitute the guide rail 109 but is not particularly required. In the device, a solid line is used for explaining. A submersible motor 176 is mounted on a front portion of a carrier 175, and a driving sprocket 177 on the front portion is driven by the motor 176 in the forward and reverse directions. Then, the driven sprocket 179 at the rear portion is rotated via the left and right crawlers 178. In such a device, a semi-cylindrical scraper 181 is mounted on the left and right sides around the rear shaft 180 so as to be rotatable back and forth, and a weight 182 that swings back and forth is attached to the outer periphery of the scraper 181. It is designed to stop at a fixed forward and backward angle with a stopper.

A stay 183 is erected from the rear end of the carrier 175, and a cam lever 184 that is swingable back and forth through the stay 183 is provided. The lever 184 has a roller 185 at the upper end, and a groove 186 at the lower end is engaged with a cam shaft 187 provided on the inner side surface of the scraper 181. The scraper 181 may have a hole in the cylindrical portion to serve as a drainage port. Further, the weight 182 can be omitted by weighting the scraper 181 itself.

In the scraper 181, when the scraper 181 is in the scraped state, the weight 182 is positioned slightly behind the rear shaft 180 and is urged clockwise as shown by the solid line, so that the scraper 181 can easily escape when sludge is scraped. There is no such thing, but on the other hand, it runs a little for sludge that has stuck. It should be noted that the movement of the cam lever 184 can be regulated to a constant value by a spring-loaded ball or the like. As the device advances, the roller 185 comes into contact with the front contact plate 188 and escapes clockwise. As a result, the cam shaft 187 is kicked forward and the scraper 181 is rotated counterclockwise. At this time, the weight 182 comes to the front of the rear shaft 180 and is stopped by the stopper, so that it comes above the sludge. The apparatus returns in this state, but at the return end, the protruding roller 185 hits the rear contact plate 189, whereby the scraper 181 rotates clockwise and is brought into a scratched state. The weight 182 may be configured instead of the tension spring. In the embodiment, the device may be moved back and forth along the guide rail. In this case, there may be a plurality of guide rails.

17 and 18 show a carrier 190 provided with a submersible motor 191, and front and rear rollers 192 that are interlocked with a sprocket 193 and a chain 194 to run freely on a guide rail 195 made of I-shaped steel. The scraper 196 shows an embodiment in which the scraper 196 is vertical when it is approached and horizontally when it is returned. Incidentally, as shown by a virtual line, a sprocket 193 may be arranged between the two divided rollers 192.

FIG. 19 shows a pair of left and right paired rollers 198 on the guide rails 197 made of chevron steel that can be rolled and driven by an underwater motor 199 to run freely.

[0053]

[Effect of the invention]

 Since the present invention is configured as described above, it is possible to provide a sludge attracting device in which the carrier front operation can be more reliably obtained even if the device is lightweight and simplified.

[Brief description of the drawings]

FIG. 1 is a side sectional view of a sludge attracting device according to an embodiment of the present invention.

FIG. 2 is a vertical sectional front view of the device.

FIG. 3 is a plan view of the same device.

FIG. 4 is an enlarged view of a main part showing the configuration of a cam of the device.

FIG. 5 is a side view showing another embodiment.

FIG. 6 is a side view showing another embodiment.

FIG. 7 is a front view showing the embodiment of FIG.

FIG. 8 is a side view showing an additional example.

FIG. 9 is a schematic view showing another embodiment.

FIG. 10 is a side sectional view showing a sludge attracting device according to an embodiment of the present invention.

FIG. 11 is a plan view of FIG. 10;

FIG. 12 is an enlarged side view of the sludge attracting device.

13 is a vertical cross-sectional view from the front of FIG.

FIG. 14 is a side sectional view showing another embodiment.

FIG. 15 is a plan view of FIG.

FIG. 16 is a side sectional view showing another embodiment.

FIG. 17 is a vertical sectional view showing another embodiment as viewed from the front.

18 is a side view of the device of FIG.

FIG. 19 is a vertical sectional view showing another embodiment as viewed from the front.

[Explanation of symbols]

9, 44, 111 ... Carrier, 13, 40, 109 ... Guide rail, 16, 43 ... Rotating shaft (supporting shaft), 17, 5
2, 136 ... scraper, 20, 48, 117 ... drive arm 21, 47 ... support shaft, 24, 50, 129 ... first
Cams 26, 51, 130 ... Second cams 35, 57, 1
23 ... Wire rope (transmission member).

Claims (10)

[Utility model registration claims] 1. A carrier capable of traveling back and forth in parallel with a bottom surface of sludge accumulating, a crawling posture attached to the carrier so that sludge can be clawed in one direction, and the sludge avoiding on the sludge. A scraper that can be switched to a return posture that can pass above, and a switching mechanism that switches the scraper,
In the sludge attracting device including a drive device that drives the switching mechanism and that reciprocates the carrier, the switching mechanism is provided on a drive arm rotatably supported by the carrier. A sludge attracting device comprising one cam and a second cam which is provided on the scraper side and which switches and drives the scraper in response to the first cam. 2. The sludge attracting device according to claim 1, wherein either the first cam or the second cam is a shaft type and the other cam is a groove type. 3. The sludge attracting device according to claim 1, wherein the first cam is a roller type, while the second cam is a groove type into which the first cam is movably fitted. 4. The sludge scraping device according to claim 1, wherein the scraping posture is a substantially vertical posture, and the returning posture is a substantially horizontal posture in which the tip is raised in the returning direction. 5. The sludge attracting device according to claim 1, wherein a guide rail is provided on the bottom surface, and the guide rail includes a plurality of guide rails. 6. The sludge attracting device according to claim 1, wherein a guide rail is provided on the bottom surface, and the guide rail is a single track. 7. The cam according to claim 1, wherein the first cam is a shaft type and the second cam is a groove type, and these cams are configured to be orthogonal to each other at least when the scraper is in the scraping posture. Sludge attracting device. 8. The sludge attracting device according to claim 7, wherein the second cam is provided with a recess for locking the first cam at a groove end. 9. The sludge attracting device according to claim 1, wherein the support shaft of the drive arm and the support shaft of the scraper are arranged in a front-rear relationship. 10. The sludge attracting device according to claim 1, wherein the support shaft of the drive arm and the support shaft of the scraper are arranged in a vertical relationship.