JP3937707B2 - Scraper scraper opening and closing device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a scraper scraper opening / closing device, and more particularly to a scraper opening / closing device for retracting a scraper for scraping sediment sludge accumulated in a sedimentation basin upward from a scraping position during return movement.
[0002]
[Prior art]
Conventionally, as shown in the side view of FIG. 11 and the plan view of FIG. 12, the submersible towed sludge scraping machine has a pair of left and right sediment sludge 73 deposited on the pond bottom 71 in the vicinity of the pond bottom 71. The scraper 79 provided in the scraper carriage 77 that reciprocates back and forth on the rails 75a and 75b continuously scrapes up to the waste mud pit 81 installed on one side of the pond length direction, and settles the pond bottom 71 The sludge 73 is discharged, and the scraping of the pond bottom 71 is an important matter in water quality management. The scraper 79 is disposed below the scraper carriage 77 and is provided across the entire width of the rails 75 on both sides of the pond width so that the entire surface of the pond bottom surface 71 can be scraped. The scraper 79 contacts or approaches the pond bottom surface 71 when the scraper carriage 77 travels, and needs to be separated from the pond bottom surface 71 when returning to the mud pit 81.
The following methods are known as this separation operation.
(1) Lift the scraper 79 up and down directly and release it.
(2) The scraper 79 is rotated in the horizontal direction and released.
[0003]
The former (1) has the disadvantage that it receives water resistance when the scraper carriage 77 is running and the disadvantage that the structure becomes complicated. Therefore, in general, the latter (2) scraper 79 is rotated horizontally. The operation method of letting go and releasing is often used. As an example of this, as shown in FIGS. 11 and 12, the respective tow ropes 85 a and 85 b arranged on the left and right (in the width direction of the scraper carriage 77) are directly bound to the distal end portion 87 a of the arm 87, and the scraper 79. It is generally performed that the door is rotated between the horizontal direction and the vertical direction to open and close, and the scraper carriage 77 is reciprocated in the front-rear direction. The tow ropes 85 a and 85 b bound to the arm 87 are wound around four sheaves 89 and drive sheaves 91 arranged at square positions, respectively, and are driven by a drive motor 93 that rotates the drive sheave 91. It receives clockwise (arrow Kw) and counterclockwise rotation, opens and closes the scraper 79 via the arm 87, and reciprocates the scraper carriage 77 in the front-rear direction. At this time, when moving in the left direction shown in the figure, the scraper cart 77 travels forward (forward direction), and the arm 87 rotates in the forward direction (position A) to bring the scraper 79 to the pond bottom 71. Raked in contact or close. On the other hand, when the scraper truck 77 is moved backward, it is assumed that the scraper truck 77 is going backward, and the arm 87 rotates in the backward direction (point B) as shown by a two-dot chain line. The scraper 79 is rotated in the horizontal direction and returned from the pond bottom 71.
[0004]
[Problems to be solved by the invention]
However, in the configuration as described above, as shown in the operation explanatory diagram of FIG. 13, when the arm moves between the point A and the point B, the arm is rotated in an arc shape. ing. In this case, the binding fulcrum Qr between the arm and the tow rope moves on the arc line and moves in the vertical direction, and the movement amount Ha of the height difference is, for example, when the arm rotation angle θa is 90 degrees. , (Arm length La−arm length La × Cos 45 °). The arm is at the highest position at a position C that is vertical. For this reason, the arm needs to lift the tow rope from the position A or the position B to the height of the position C, and conversely lowers the tow rope from the position C to the height of the position A or the position B. There is a need. For this reason, the weight of the pulling rope (stainless steel, 12 mm diameter) is lifted from the position A or the position B to the height of the position C, and acts as a reaction force to inhibit the rotation of the arm. From position C to the height of position A or position B, it becomes a force applied to the rotation of the arm to lower it, and the force of the pulling rope's own weight is opposite to position C, making it difficult to smoothly rotate the arm. become. In addition, a large traction force is required as much as the weight of the traction rope, and since the force acts upward from the position A or the position B to the position C, the scraper carriage is removed from the rail. It is easy. In particular, in a sedimentation basin with a long scraping distance, the weight of the tow rope increases, so there is a drawback that the pivotability of the arm becomes more difficult, and the elimination of such a drawback is desired. Also, since the traction rope moves in the vertical direction, the wrapping length changes. Therefore, in order to keep the wrapping length constant, for example, a length adjusting device such as a movable sheave (arrow Pa) is provided. This becomes a cause of failure that complicates the configuration and also increases costs. Moreover, since the underwater traction type sludge scraper is used in the water of the settling basin, it is difficult to visually confirm the above operation. Therefore, there is a demand for a highly reliable and low-cost apparatus that does not cause malfunction due to such a drawback.
[0005]
The present invention pays attention to the above-mentioned problems, and relates to a scraper scraper opening and closing device, and in particular, an arm that rotates in a circular arc shape, and can rotate the arm with a simple configuration without directly receiving the weight or tension of the tow rope. It is an object of the present invention to provide a scraper opening / closing device that is lightweight and inexpensive, and that can smoothly and reliably perform scraper opening / closing operations and scraping operations.
[0006]
[Means for Solving the Problems]
  In order to achieve the above object, the scraper scraper opening and closing device according to the present invention uses a tow rope.Bogie frameWith the scraper opening and closing device of the sludge scraper that opens and closes the scraper by rotating the armThere,A tow rope fitting tied to the tow rope, a receiving frame that is arranged in parallel at a certain height from the bogie frame and guides the tow rope fitting to keep the tow rope horizontal, and is attached to the tow rope fitting. And an arm formed with a long hole that can turn in an arc shape while maintaining the traction rope supported horizontally by the receiving frame, and the receiving frame is formed in a U-shape and is on the groove side. Is arranged to face the inner surface side, and the roller of the tow rope fitting is inserted.
[0008]
According to the above configuration, since the arm and the tow rope that opens and closes the scraper are stopped from being directly bound, and the tow rope fitting is slid vertically with respect to the arm, Since the arm that rotates in an arc does not directly lift the weight of the tow rope, it can rotate smoothly in an arc, and the scraper can be opened and closed reliably and easily with a simple configuration. Since it is configured to slide in the vertical direction by the receiving roller of the traction rope inserted in the long hole provided in the arm, it slides with low resistance, so smooth arcuate rotation with low traction force It can be performed with a simple configuration. Even if the settling basin scratching distance is long and the deflection of the tow rope increases due to its own weight, the tow rope bracket can keep the height of the tow rope constant with the receiving frame, and the arm can be rotated, so the scraper can be opened and closed. It can be done reliably and effectively. Since the stopper attached to the arm and the stopper receiver attached in parallel to the frame are used, the scraper can be reliably opened and closed and manufactured easily. In addition, since the stopper is provided at a position separated from the center of rotation of the arm by a predetermined distance, the structure is simple as long as a small reaction force is received. Since the arm that rotates in an arc shape does not directly lift the weight of the pulling rope, the arm can rotate smoothly in an arc shape, and the scraper can be opened and closed reliably and easily.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of a scraper scraper opening and closing device according to the present invention will be described in detail with reference to the accompanying drawings. The same parts as those in the conventional example are denoted by the same reference numerals, and description thereof is omitted. In the following, the direction in which the scraping carriage reciprocates is referred to as the front-rear direction, and the width direction of the scraping carriage (the direction orthogonal to the reciprocating movement) is referred to as the left-right direction. 1 is a side view of the scraper scraper opening / closing device 1, FIG. 2 is a partially enlarged side view of the scraper scraper opening / closing device 1, FIG. 3 is a plan view of FIG. 2, and FIG. 4 is a front view of FIG. 5 is a partial cross-sectional view of the arm and tow rope binding unit.
[0010]
1 to 5, the scraper carriage 5 of the scraper scraper opening / closing device 1 is provided with a rolling frame 9 that rotates on a rail 75 on a carriage frame 7 so as to roll freely. The carriage frame 7 has frames 11 disposed on both sides in the left-right direction of the scraping carriage 5, and the frames 11 on both sides are connected and integrated by connecting frames 11A provided above both front and rear ends. Yes. In the frame 11, a pair of grooved steels 11a are arranged with a predetermined distance from each other with the plane portion inside. The above-described rolling wheels 9 are attached to the lower surface side between the pair of grooves 11a and in the vicinity of the front and rear end portions. Further, between the pair of groove steels 11a and in the vicinity of the center in the front-rear direction and the vertical direction, the arm support pins 13 attached to the pair of groove steels 11a are rotatably supported in the front-rear direction. An arm 15 is provided.
[0011]
The arm 15 includes a pair of right arm 15a and left arm 15b that are divided in the left-right direction. Alternatively, the arm 15 may be configured to be integrally formed with a portion into which the arm support pin 13 is inserted, and to be divided into a pair of right arm 15a and left arm 15b with a slit groove at the tip. . A scraper 79 is fixed to the lower surface of each arm 15 attached to the left and right frames 11, and the scraper 79 is integrated and disposed between the left and right frames 11. In the embodiment, a single-stage structure example in which one scraper 79 is fixed to the arm 15 is shown. However, the scraper 79 is provided in several stages by being linked by a link mechanism or the like in the front-rear direction (traveling direction). Several stages of scraper 79 may be opened and closed by movement.
[0012]
A long hole 17 is formed in each end of the arm 15. The position of the long hole 17 is set to an appropriate distance Ra from the arm support pin 13, and the length Lh of the long hole 17 is a pulling force which will be described later when the arm 15 is rotated 90 degrees in an arc shape at an angle θa. The rope receiving roller pin 25 is configured to have a length Lh (Lh = Ra−Ra × Cos 45 °) that does not interfere even when the rope receiving roller pin 25 moves in the vertical direction. That is, the appropriate distance Ra of the position of the long hole 17 is set so that when the traction rope receiving roller pin 25 is at the position A point and the position C point, it is at the same height or a slightly higher position as a roller receiving frame 41 described later. Has been. Further, the length Lh that does not interfere is set such that the lower end surface of the length Lh is located at a position lower than the movement amount Ha of the height difference shown in FIG.
[0013]
A tow rope fitting 21 is inserted and attached to the long hole 17 of the arm 15. The pulling rope fitting 21 is inserted into the elongated holes 17 of the right arm 15a and the left arm 15b so that an arm sliding surface roller 23 made of a bearing with low frictional resistance is slidable in the vertical direction with respect to the arm 15. Has been. The arm sliding surface roller 23 inserted into each elongated hole 17 is rotatably supported by a pulling rope receiving roller pin 25. The rotation of the arm sliding surface roller 23 can absorb the misalignment between the core of the traction rope fitting 21 and the mounting shafts of the sheaves 89 arranged on both sides, so that the sheave 89 can be easily positioned. Since the arm sliding surface roller 23 is made of an oilless metal, the frictional resistance is minimized, and the arm 15 can be rotated with a slight force.
[0014]
Further, between the arm sliding surface rollers 23 inserted in the respective long holes 17, the oilless metal 27 having a small frictional resistance inserted in the traction rope receiving roller pin 25 is supported so as to be swingable. A tow rope fitting 29 is inserted. On the outer periphery of the tow rope fitting 29, a yoke portion 29a is formed that is divided into two in the front-rear direction. One end portion of the turnbuckle 31 is attached to the yoke portion 29a divided in two so as to be swingable by a pin 33. A pulling rope 85 is attached to the other end of the turnbuckle 31.
[0015]
The pulling rope 85 is generally made of stainless steel and has a size of 12 mm as described above. Therefore, the downward weight of the pulling rope 85 always acts on the turnbuckle 31. In particular, when the settling basin scratching distance is long and the length of the tow rope 85 is increased, the tow rope 85 is bent due to its own weight. Since the bending load acts on the lowermost end portion of the long hole 17 of the arm 15 in a concentrated manner and inhibits the rotation of the arm 15, in order to prevent the bending load from acting on the arm 15. Further, a roller receiving frame 41 described later is provided. The turnbuckle 31 is configured so that the tension and length of the tow rope 85 can be adjusted.
[0016]
The tow rope receiving roller pin 25 is supported by a tow rope receiving roller 37 on the outer side of each arm sliding surface roller 23. The pulling rope receiving roller pin 25 has a snap ring 39 inserted at both ends, and the snap ring 39 includes two arm sliding surface rollers 23, a pulling rope fitting 29, and two pulling ropes inserted therebetween. The receiving roller 37 is sandwiched and held. Instead of the snap ring 39, a nut or the like may be used.
[0017]
The tow rope receiving roller 37 is inserted into the roller receiving frame 41 and is rotatably supported. The outer peripheral portion of the tow rope receiving roller 37 is formed with a stepped diameter, the small diameter portion 37a is inserted into the roller receiving frame 41, and the stepped portion 37b is close to the surface of the roller receiving frame 41, so Movement is regulated. The roller receiving frame 41 is formed of a U-shaped light groove steel or the like, and the groove side is disposed so as to face the inner surface side. The small diameter portion 37a of the pulling rope receiving roller 37 is inserted. As described above, since the pulling rope receiving roller 37 is inserted into the groove portion 41a of the light groove steel, it is possible to prevent the wheel from being removed and to improve the reliability.
[0018]
The roller receiving frame 41 is arranged in parallel to the fixed height from the frame 11, and both end portions thereof are respectively fixed to the gate-shaped stand 43. The gate-shaped stand 43 may be configured by two stands 43 a and connected between the pair of frames 11 so as to be easily assembled by the bolt 45. The gate-shaped stand 43 is disposed outside the rotating arm 15, and its lower side is attached to the pair of frames 11. That is, the length Ls in the front-rear direction of the roller receiving frame 41 is the length Lm in the front-rear direction when the arm 15 is rotated 90 degrees in an arc shape (Lm = 2 × length of the arm 15 × Sin 45 °). ), The arm 15 is attached to the frame 11 with a margin when the arm 15 rotates in the front-rear direction. As a result, when the tow rope bracket 29 is pulled in the front-rear direction by the tow rope 85, the tow rope bracket portion 21 moves the frame 11 in the roller receiving frame 41 with the tow rope receiving roller 37 as a guide. The arm 15 is moved in the front-rear direction parallel to the front and rear, and is slid up and down in the elongated hole 17 of the arm 15 to rotate the arm 15 in the front-rear direction.
[0019]
In this way, the arm 15 and the traction rope 85 are not directly bound as in the prior art, and in the present invention, the traction rope 85 is bound to the traction rope fitting 21 accommodated in the roller receiving frame 41. Therefore, since the weight of the pulling rope 85 is received by the roller receiving frame 41, the weight does not act on the arm 15, so that the arm 15 can be rotated smoothly and easily. As described above, even when the settling basin scratching distance is long and the length of the tow rope 85 is increased, the load of bending due to the heavy weight of the tow rope 85 is received by the roller receiving frame 41. Since the dead weight does not act on the long hole 17 of the arm 15 and the rotation of the arm 15 is not obstructed, the rotation of the arm 15 is smooth.
[0020]
Rotation of the arm 15 is such that the scraper 79 is closed at the position A indicated by the solid line (the scraper cart 5 is in a state of being scraped when traveling), and the scraper 79 is opened at the position B indicated by the alternate long and short dash line ( The scraper carriage 5 is configured to be interlocked via the tow rope fitting 21 so that the scraper 79 is separated from the pond bottom surface 71 when returning. A position A and a position B where the arm 15 rotates are set at an angle of 45 ° in the front-rear direction with respect to the center position C of the scraper carriage 5 (maximum height position of the arm 15 indicated by a two-dot chain line). Has been. For this purpose, a stopper 51 is provided between the right arm 15a and the left arm 15b. The stopper 51 may be inserted and attached to a slit groove divided into a pair of right arm 15a and left arm 15b provided on the arm 15, or the right arm 15a and left arm 15b. It may be attached to either surface.
[0021]
The stopper 51 is formed so that both ends are formed at an angle of 90 ° and are orthogonal to the center line Ca of the arm 15. Further, the arm 15 rotates, and a closing stopper receiver 53 that contacts and positions the stopper 51 at a position A indicated by a solid line, and an opening that contacts and positions the stopper 51 at a position B indicated by a one-dot chain line. A stopper receiver 55 is provided on the frame 11 of the scraper carriage 5. The closing stopper receiver 53 and the opening stopper receiver 55 are parallel to the frame 11 so that the abutting surface with the stopper 51 abuts on a plane when the arm 15 rotates 90 degrees in an arc shape. Has been attached to. Thereby, the stopper 51, the closing stopper receiver 53, and the opening stopper receiver 55 are in a position spaced apart from the arm support pin 13 serving as the rotation center by a predetermined distance, so that the opening / closing position is ensured. Reliability is improved and manufacturing is facilitated. In addition, since the stopper is provided at a position spaced apart from the center of rotation of the arm by a predetermined distance, the configuration is simple as long as a small reaction force is received.
[0022]
The operation of the scraper carriage 5 configured as described above will be described. In order to scrape the settled sludge 73 on the pond bottom 71, the drive motor 93 is rotated clockwise (in the direction of the arrow Kw shown in FIG. 11), and the arm 15 is shown by a solid line in FIG. Turn left. The arm 15 is pulled by the tow rope 85, rotates around the arm support pin 13, the stopper 51 attached to the arm 15 contacts the closing stopper receiver 53, and the circle from the position B to the position A is obtained. It is positioned by turning 90 degrees in an arc. At this time, the tow rope fitting 29 attached to the arm 15 slides in the vertical direction from the position B, thereby moving horizontally and reaching the position A via the position C. The scraper 79 attached to is in the closed position.
[0023]
In this state, when the drive motor 93 is further rotated, the scraper carriage 5 travels with the scraper 79 closed, and the sediment sludge 73 on the pond bottom 71 is scraped and poured into the mud pit 81. . When the scraper 79 travels and scrapes the settled sludge 73 on the pond bottom 71 and reaches the drainage pit 81, a drive motor 93 of the tow rope 85 is rotated counterclockwise by a limit switch (not shown). The arm 15 rotates around the arm support pin 13, and the stopper 51 attached to the arm 15 contacts the opening stopper receiver 55, and rotates 90 degrees in an arc from the position A point to the position B point. Is positioned. At this time, similarly to the above, the arm 15 slides in the vertical direction from the position A, moves horizontally, reaches the position B via the position C, and is attached to the arm 15. The scraper 79 is in the open position. In this state, when the drive motor 93 is further rotated, the scraper carriage 5 opens the scraper 79 and the scraper 79 returns in a state away from the pond bottom 71.
[0024]
In the above, the arm 15 is rotated by 90 ° in an arc shape between the point A and the point B about the arm support pin 13 of the arm 15 as shown in the operation explanatory diagram of FIG. However, even when passing through the position C, the traction rope fitting 21 slides in the vertical direction with little frictional resistance in the long hole 17 of the arm 15, and the traction rope fitting 21 moves while maintaining a horizontal state. . For this reason, since the arm 15 rotates without receiving a load in the vertical direction, an effect that the rotation of the arm 15 becomes smooth can be obtained.
[0025]
Further, since the tow rope fitting 29 is swingably supported by the roller receiving frame 41 via the oilless metal 27, the tow rope receiving roller pin 25, and the tow rope receiving roller 37, the weight of the tow rope 15 is reduced. Since it does not act on the arm 15, the arm 15 rotates with a lighter force and becomes smooth. Further, since the traction rope 85 moves in the horizontal direction, the wrapping length does not change and is constant, so that a length adjusting device that accompanies vertical movement as in the prior art becomes unnecessary. For this reason, the configuration is simplified, the failure is eliminated, the reliability is improved, and the cost is reduced. In the above embodiment, the long hole 17 of the arm 15 and the pulling rope receiving roller pin 25 are connected to each other by aligning the longitudinal axis of the pulling rope 85 in a straight line as shown in FIGS. The right arm 15 a and the left arm 15 b are arranged on both sides of the 21.
[0026]
FIG. 7 is a perspective view of a conceptual diagram of the configuration of the first traction rope fitting 21 </ b> A, which is another first embodiment of the traction rope fitting 21. 21 A of 1st traction rope metal parts are set as the structure provided with the fulcrum of the 1st traction rope receiving roller pin 25A which consists of a stepped round bar between the right arm 15a and the left arm 15b. The small diameter portion 25a of the first pulling rope receiving roller pin 25A is inserted into the long holes 17 of the right arm 15a and the left arm 15b. Further, on both sides of the first traction rope receiving roller pin 25A, a traction rope 85 is attached by a turnbuckle or the like as in FIG. In the above configuration, the first traction rope receiving roller pin 25A made of a stepped round bar may use a bearing made of a material such as oilless metal. Further, the first traction rope receiving roller pin 25A may be constituted by a round bar and a cylindrical pipe, and a bearing such as an oilless bearing may be inserted therebetween. Alternatively, the length of the first pulling rope receiving roller pin 25A may be increased and housed in a pin receiving frame having the same structure instead of the roller receiving frame 41 so as to receive the weight of the pulling rope 85.
[0027]
FIG. 8 shows a second traction rope fitting 21B of the second embodiment which is a modification of FIG. 7, and the second traction rope fitting 21B is an elliptical hollow long cylinder outside the right arm 15a and the left arm 15b. A rope fitting 25b having a shape is provided. A second traction rope receiving roller pin 25B is passed through the rope fitting 25b and the long holes 17 of the right arm 15a and the left arm 15b. In addition, tow ropes 85 are attached to both sides of the rope fitting 25b by turnbuckles or the like as in FIG. The second traction rope receiving roller pin 25B may use a bearing made of a material such as oilless metal, as described above. Alternatively, the length of the second pulling rope receiving roller pin 25B may be increased and housed in a pin receiving frame having the same structure instead of the roller receiving frame 41 so as to receive the weight of the pulling rope 85.
[0028]
FIG. 9 shows a third traction rope fitting 21C of the third embodiment which is a modification of FIG. 8, and the third traction rope fitting 21C is integrated with the right arm 15a and the left arm 15b. One arm 15d is disposed inside the rope fitting 25b. The first arm 15d has a long hole 17 having the same shape as the right arm 15a and the left arm 15b. A third pulling rope receiving roller pin 25C is passed through the rope fitting 25b and the long hole 17 of the first arm 15d. The third traction rope receiving roller pin 25C may use a bearing made of a material such as oilless metal, as described above. Alternatively, the length of the second pulling rope receiving roller pin 25B may be increased and housed in a pin receiving frame having the same structure instead of the roller receiving frame 41 so as to receive the weight of the pulling rope 85.
[0029]
FIG. 10 shows a fourth traction rope fitting 21D of the fourth embodiment which is another modification, and the fourth traction rope fitting 21D uses an integrated second arm 15e having no long hole 17. A fourth traction rope receiving roller pin 25D supported by an elliptic hollow cylindrical rope fitting 25d is disposed before and after the second arm 15e. The outer diameter portion of the fourth traction rope receiving roller pin 25D is in contact with the side surface Sd of the second arm 15e, and the traction force of the traction rope 85 is transmitted to the second arm 15e. At this time, it is better if the fourth pulling rope receiving roller pin 25D slides in the vertical direction with respect to the second arm 15e and rotates. The fourth traction rope receiving roller pin 25D rotates with respect to the second arm 15e. A traction rope 85 is attached to both sides of the rope fitting 25d by turn buckles (not shown). Alternatively, the length of the fourth traction rope receiving roller pin 25D may be increased and housed in a pin receiving frame having the same structure instead of the roller receiving frame 41 so as to receive the weight of the traction rope 85.
[0030]
Also in the other embodiments described above, like the arm sliding surface roller 23 of the traction rope metal part 21, the first traction rope receiving roller pin 25A or the second traction rope having a small frictional resistance in the long hole 17 of the arm 15 is used. Bearings such as the receiving roller pin 25B are slidably inserted in the vertical direction. Thereby, since the weight of the tow rope 85 does not act on the arm 15, the arm 15 can be smoothly and easily rotated. Further, the fourth pulling rope receiving roller pin 25D having a small frictional resistance is provided before and after the second arm 15e without providing the long hole 17 in the arm 15, and is in contact with the second arm 15e when it is rotated. The traction force of 85 is transmitted. Thereby, with the simple structure, the weight of the tow rope 85 does not act, and the second arm 15e can be smoothly and easily rotated by the tow force of the tow rope 85.
[0031]
As described above, the present invention is provided with a traction rope bracket that is bound to the traction rope and slides in the vertical direction with respect to the arm, so that the weight or tension of the traction rope is applied to the arm that rotates in an arc shape. Without being directly received, the arm can be smoothly rotated with a simple configuration, the scraper can be opened and closed, and the scraping operation can be reliably performed, and the weight can be reduced and the cost can be reduced.
[0032]
【The invention's effect】
As described above, according to the scraper scraper opening and closing device of the present invention, the arm that rotates in an arc shape does not directly lift the weight of the tow rope, and thus can smoothly rotate in an arc shape. The scraper can be opened and closed reliably and easily, and the reliability of the scraper can be improved. In addition, even if the settling basin scratching distance is long and the deflection due to the weight of the tow rope increases, the height of the tow rope can be kept constant and the arm can be rotated, so that the scraper can be opened and closed effectively. It can be performed and an effect applicable to a wide range can be obtained. Since the scraper scraper opening / closing device has a simplified structure and is lightened, the reliability of the device can be improved and the cost can be reduced. The stopper attached to the arm can ensure the open / close positioning of the scraper, so that the reliability of the open / close of the scraper can be improved.
[Brief description of the drawings]
FIG. 1 is a side view of a scraper scraper opening and closing device according to the present invention.
FIG. 2 is a partially enlarged side view of the scraper scraper opening and closing device according to the present invention.
FIG. 3 is a partially enlarged plan view of the scraper scraper opening / closing device according to the present invention.
FIG. 4 is a partially enlarged front view of the scraper scraper opening / closing device according to the present invention.
FIG. 5 is a partial configuration diagram of an arm and a traction rope binding unit according to the present invention.
FIG. 6 is an action explanatory diagram of a traction force acting on an arm according to the present invention.
FIG. 7 is a perspective view showing a structural conceptual diagram of the first embodiment in the tow rope fitting part of the present invention.
FIG. 8 is a perspective view showing a conceptual configuration diagram of a second embodiment of the tow rope fitting portion of the present invention.
FIG. 9 is a perspective view showing a conceptual configuration diagram of a third embodiment of the tow rope fitting portion of the present invention.
FIG. 10 is a perspective view showing a conceptual configuration diagram of a fourth embodiment of the tow rope fitting part of the present invention.
FIG. 11 is a side view showing an overall configuration of a conventional underwater towed sludge scraper.
FIG. 12 is a plan view showing the overall configuration of a conventional underwater towed sludge scraper.
FIG. 13 is an explanatory diagram of the action of traction force acting on a conventional arm.
[Explanation of symbols]
1 ... scraper opening / closing device for scraper, 5 ... scraper carriage, 7 ... carriage frame,
9 ... rolling wheel, 11 ... frame, 15 ... arm, 17 ... long hole,
21 …… Tropping rope bracket, 23 …… Roll for arm sliding surface,
25 …… Tow rope receiving roller pin, 27 …… Oilless metal,
29 …… Tow rope brackets, 31 …… Turnbuckle,
37 …… Tow rope receiving roller, 41 …… Roller receiving frame,
43 …… Gate-shaped stand, 51 …… Stopper, 53 …… Stopper stopper for closing,
55 ... Opening stopper receptacle, 71 ... Bottom of pond, 75 ... Precipitated sludge,
79 ... scraper, 81 ... mud pit, 85 ... tow rope,
95 …… Drive motor

Claims (1)

A scraper switchgear sludge raking device for opening and closing the scraper by rotating the arm of the bogie frame by pulling rope,
A tow rope fitting bound to the tow rope;
A receiving frame that is arranged in parallel to the fixed height from the bogie frame and guides the tow rope fitting to keep the tow rope horizontal.
An arm that is attached to the tow rope fitting and has an elongated hole that allows the arm to turn in an arc shape while maintaining the tow rope supported by the receiving frame horizontally; and
The scraper scraper opening and closing device characterized in that the receiving frame is formed in a U shape, the groove side is arranged facing the inner surface side, and a roller of the pulling rope fitting is inserted .

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