JP2002085910A - Device for opening/closing scraper of raking machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lightweight and inexpensive device for opening/closing a scraper of a raking machine, which can rotate an arm to be rotated in a circular arc state smoothly by simple constitution without receiving the empty weight or tension of a tow rope, can open/close the scraper surely and can make the scraper carry out raking work. SOLUTION: This device for opening/closing the scraper is constituted so that the arm is rotated by the tow rope to open/close the scraper of the sludge raking machine which makes the closed scraper go forward in a settling basin to rake the settled sludge and make the opened scraper come backward. The device for opening/closing the scraper is provided with a tow rope metal fitting which is united with the tow rope and slides vertically with respect to the arm.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a scraper opening / closing device, and more particularly to a scraper for scraping settled sludge deposited in a sedimentation basin, and for retracting the scraper upward from a scraping position when returning. It relates to a switchgear.

[0002]

2. Description of the Related Art A conventional underwater traction type sludge scraper is shown in FIG.
As shown in the side view of FIG.
The sludge 73 deposited in 1 is scraped by a scraper 79 provided on a scraping truck 77 that reciprocates back and forth on a pair of left and right rails 75a, 75b laid near the bottom 71 of the pond. The sewage sludge 73 on the pond bottom 71 is discharged by continuously scraping up to the installed sludge pit 81, and the sewage on the pond bottom 71 is an important matter in water quality management. The scraper 79 is disposed below the scraping cart 77, is provided at the entire width between the rails 75 on both sides of the pond width, and is configured so that the entire pond bottom surface 71 can be scraped. This scraper 79 is a scraper truck 77
Contacting or approaching the pond bottom 71 when going in
At the time of re-going after scraping to the mud pit 81, the pond bottom 71
An operation to separate from is required. The following method is known as this separating operation. (1) The scraper 79 is directly lifted and released vertically. (2) The scraper 79 is turned horizontally and released.

[0003] The former (1) has a drawback of receiving water resistance during running of the scraper 77 and a drawback of complicating the structure. Therefore, in general, the latter (2) requires the scraper 79 to be moved in the horizontal direction. An operation method in which the rotation is performed and the separation is performed is often used. As an example of this, as shown in FIGS. 11 and 12, respective tow ropes 85 a and 85 b arranged on the left and right (in the width direction of the scraper 77) are directly bound to the distal end portion 87 a of the arm 87 and the scraper 79. Is rotated between a horizontal direction and a vertical direction to open and close, and the carriage 77 is reciprocated in the front-rear direction. The tow ropes 85a and 85b bound to the arm 87 are respectively wound around four sheaves 89 and a drive sheave 91 disposed at rectangular positions, and a drive motor 93 for rotating the drive sheave 91.
As a result, the scraper 79 is opened and closed via the arm 87 and reciprocates the scraper truck 77 back and forth in the clockwise direction (arrow Kw) and the counterclockwise direction. At this time, when moving to the left in the figure, it is assumed that the scraping cart 77 is going forward (forward), and the arm 87 is rotated in the going direction (point A) to move the scraper 79 to the pond bottom surface 7.
1 or is approaching or approaching. Conversely, when the carriage 77 is moved backward, it is determined that the carriage 77 is going home, and the arm 87 is rotated in the homeward direction (point B) as shown by a two-dot chain line. Then, the scraper 79 is rotated in the horizontal direction to return while separating from the pond bottom surface 71.

[0004]

However, in the above configuration, when the arm moves between the point A and the point B as shown in the operation explanatory diagram of FIG. The arm is rotated in an arc shape. In this case,
The binding fulcrum Qr of the arm and the tow rope moves in the vertical direction because it traverses on an arc line, and the movement amount Ha of the height difference is obtained.
For example, when the rotation angle θa of the arm is 90 degrees, the dimension is (arm length La−arm length La × Cos 45 °). The arm is at the highest position at the vertical position C. For this reason, the arm needs to raise the tow rope from the position A or the point B to the position C, and conversely, lowers the tow rope from the position C to the position A or the point B. There is a need.
For this purpose, tow rope (stainless steel, 12mm diameter)
The self-weight of the arm is lifted from the position A or the point B to the height of the position C, which is a reaction force to hinder the rotation of the arm, and conversely, the height of the arm from the position C to the position A or the point B In this case, the force is applied to the rotation of the arm for lowering, and the force of the own weight of the tow rope is opposite to the position C, so that it is difficult to smoothly rotate the arm. In addition, a large traction force is required by the own weight of the traction rope, and since the force acts upward from the position A or the position B to the position C, the trolley is disengaged from the rail. Making it easier. Especially in the sedimentation ponds where the scraping distance is long,
Since the own weight of the tow rope also increases, there is a drawback that the turning property of the arm becomes more difficult, and it is desired to eliminate such a drawback. Also, since the tow rope moves in the vertical direction, the wrapping length changes, and in order to keep the wrapping length constant, for example, a length adjusting device that makes the sheave movable (arrow Pa) is used. This necessitates a failure that complicates the configuration and increases the cost. Further, since the underwater traction type sludge scraper is used in the water of the sedimentation basin, it is difficult to visually confirm the above operation. Therefore, there is a demand for a reliable and low-cost device that does not cause malfunction due to such disadvantages.

The present invention is directed to a scraper opening / closing device which focuses on the above problems, and particularly relates to an arm which rotates in an arc shape without directly receiving the own weight or tension of a tow rope.
An object of the present invention is to provide a lightweight and inexpensive scraper opening / closing device that can smoothly rotate and open and scrape a scraper with a simple configuration, and that can perform a scraper opening / closing operation reliably.

[0006]

In order to achieve the above object, a scraper scraper opening / closing apparatus according to the present invention is provided. A scraper opening / closing apparatus for a sludge scraper that opens and closes a scraper by rotating an arm with a pulling rope. The device is configured to be provided with a tow rope fitting which is bound to the tow rope and slides vertically with respect to the arm.

In this case, it is preferable that the tow rope fitting is constituted by a tow rope receiving roller inserted into a long hole provided in the arm. Further, it is preferable to provide a receiving frame for guiding the tow rope fitting horizontally. Also,
The tow rope fitting may have a bearing on the sliding surface. Further, it is preferable to provide a stopper for positioning the opening and closing of the scraper on the arm.

[0008] According to the above-described configuration, unlike the related art, the arm and the tow rope for opening and closing the scraper are not directly bound, and the tow rope fitting is slid up and down with respect to the arm. Since the arm that rotates in an arc shape does not directly lift the own weight of the tow rope, the arc can be smoothly rotated, and the opening and closing of the scraper can be easily performed with a simple and simple configuration. . The pulling rope is inserted into the long hole provided in the arm, and it is configured to slide in the vertical direction, so it slides with low resistance. It can be performed with a simple configuration.
Even if the settling basin has a long scraping distance and the deflection of the tow rope due to its own weight increases, the tow rope bracket keeps the height of the tow rope constant at the receiving frame and the arm can rotate, resulting in the opening and closing of the scraper. It can be performed effectively and reliably. Since the stopper is attached to the arm and the stopper is attached parallel to the frame, the open / close position of the scraper can be surely determined, and the production can be facilitated.
Further, since the stopper is provided at a position separated from the rotation center of the arm by a predetermined distance, a small reaction force may be received, thereby simplifying the configuration. Since the arm that rotates in an arc shape does not directly lift the weight of the tow rope, the arm can smoothly rotate in an arc shape, and the opening and closing of the scraper can be performed reliably and easily.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a scraper opening / 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 will be omitted. In the following, the direction in which the truck is reciprocated is referred to as the front-rear direction, and the width direction (the direction orthogonal to the reciprocating direction) of the truck is referred to as the left-right direction. FIG. 1 is a side view of the scraper opening / closing device 1, and FIG. 2 is a scraper opening / closing device 1.
3, FIG. 3 is a plan view of FIG. 2, FIG. 4 is a front view of FIG. 2, and FIG. 5 is a cross-sectional view of a part of the structure of the arm and the tow rope binding portion.

1 to 5, a scraper truck 5 of a scraper scraper opening and closing device 1 has a rail frame 7 on a truck frame 7.
A rolling wheel 9 is provided so as to roll freely on the wheel 5.
The bogie frame 7 has a frame 11 disposed on both sides of the scraping bogie 5 in the left-right direction, and the connecting frame 1 in which the frames 11 on both sides are provided above both front and rear ends.
They are connected and integrated by 1A. Frame 11
In the first embodiment, a pair of grooved steel members 11a are arranged at a predetermined interval with the plane portion inside. The rolling wheel 9 is provided on the lower surface side between the pair of grooved steel bars 11a and near each of the front and rear ends. Also, between the pair of grooved steels 11a, and near the center in the front-rear direction and the vertical direction, the arm support pins 13 attached to the pair of grooved steels 11a rotatably support in the front-rear direction. Arm 15 is provided.

The arm 15 is composed of a pair of right and left arms 15a and 15b which are divided in the left and right direction. Alternatively, the arm 15 integrally forms a part into which the arm support pin 13 is inserted,
A slit groove is formed at the tip, and a pair of right arms 15a is formed.
And the left arm 15b.
Each arm 15 attached to the left and right frames 11
A scraper 79 is fixed to the lower surface of the frame 11, and the scraper 79 is integrated and disposed between the left and right frames 11. In the embodiment, the scraper 79 is used.
Shows an example of a one-stage structure in which one is fixed to the arm 15, but is provided in several stages connected by a link mechanism or the like in the front-rear direction (running direction), and several stages of scrapers 79 are formed by the rotation of the arm 15. It may be opened and closed.

Each of the arms 15 is provided with a long hole 17 at the tip thereof. The position of the long hole 17 is set at an appropriate distance Ra from the arm support pin 13, and the length Lh of the long hole 17 is such that the arm 15 is formed in an arc shape at an angle θa of 90 °.
° When rotating, a tow rope receiving roller pin 2
The length Lh (Lh =
Ra−Ra × Cos 45 °). That is, the appropriate distance Ra of the position of the long hole 17 is set so that when the tow rope receiving roller pin 25 is at the position A and the position C, the height is the same as or slightly higher than the roller receiving frame 41 described later. Have 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.

A tow rope fitting 21 is inserted into and attached to the long hole 17 of the arm 15. The tow rope fitting portion 21 is inserted into each of the long holes 17 of the right arm 15a and the left arm 15b with an arm sliding surface roller 23 made of a bearing having a low frictional resistance so as to be slidable in the vertical direction with respect to the arm 15. Have been. Each slot 1
The arm slide surface roller 23 inserted into the arm 7 is rotatably supported by a tow rope receiving roller pin 25. By the rotation of the arm sliding surface roller 23, even if the center between the tow rope fitting 21 and the mounting shaft of the sheave 89 arranged on both sides can be absorbed, the positioning of the sheave 89 becomes easy. This arm sliding surface roller 23
Is made of an oil-less metal, so that the frictional resistance is minimized and the arm 15 can be rotated with a small force.

Further, between the arm sliding surface rollers 23 inserted in the respective long holes 17, it is swingable via an oilless metal 27 having a low frictional resistance inserted into the pulling rope receiving roller pin 25. A supported tow rope fitting 29 is inserted. The yoke portion 2 divided into two in the front-rear direction is provided on the outer periphery of the tow rope fitting 29.
9a are formed. Yoke part 29 divided into two
In (a), one end of a turnbuckle 31 is swingably attached by a pin 33. A tow rope 85 is attached to the other end of the turnbuckle 31.

As described above, the tow rope 85 is generally made of stainless steel and has a diameter of 12 mm, so that its own downward weight always acts on the turnbuckle 31. In particular, if the settling basin has a long scraping distance and the length of the tow rope 85 is long, the tow rope 85 is bent by its own weight. Since the bending load acts intensively on the lowermost end of the long hole 17 of the arm 15 and hinders the rotation of the arm 15, the bending load does not act on the arm 15. And a roller receiving frame 41 described later. The turnbuckle 31 is configured such that the tension and length of the towing rope 85 can be adjusted.

The pulling rope receiving roller pin 25 is supported by a pulling rope receiving roller 37 outside each of the arm sliding surface rollers 23. A snap ring 39 is inserted into both cut portions of the tow rope receiving roller pin 25, and the snap ring 39 is provided between two arm sliding surface rollers 23, a tow rope fitting 29,
In addition, two tow rope receiving rollers 37 are sandwiched and held. Instead of the snap ring 39, a nut or the like may be used for clamping.

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, and 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, and has a left-right direction. Movement is regulated. The roller receiving frame 41 is formed of a U-shaped light groove shaped steel or the like, and is disposed with the groove side facing the inner surface side. The groove 41a of the light groove shaped steel of the roller receiving frame 41 has The small diameter portion 37a of the tow rope receiving roller 37 is inserted.
As described above, since the tow rope receiving roller 37 is inserted into the groove 41a of the light grooved steel, the removal of the wheel is prevented, and the reliability is improved.

The roller receiving frame 41 is disposed parallel to the frame 11 at a predetermined height, and both ends thereof are fixed to the portal stand 43, respectively. The gate-shaped stand 43 may be constituted by two stands 43a, connected between a pair of frames 11, and easily assembled with bolts 45. The portal stand 43 is arranged outside the rotating arm 15, and its lower side is attached to the pair of frames 11. That is, the length Ls of the roller receiving frame 41 in the front-rear direction is
The rotation length Lm in the front-rear direction when the arm 15 rotates at an angle of 90 ° in an arc shape (Lm = 2 × length of arm 15 × Sin
45 °), and is slightly attached to the frame 11 when the arm 15 rotates in the front-rear direction. Thereby, the tow rope fitting 21
When the tow rope fitting 29 is towed by the tow rope 85 in the front and rear direction, the tow rope receiving roller 37 is guided horizontally by the roller receiving frame 41 in the roller receiving frame 41 in the front and rear direction in parallel with the frame 11. While moving, the arm 15 is slid vertically in the long hole 17 of the arm 15 to rotate the arm 15 in the front-back direction.

As described above, the arm 15 and the tow rope 85 are not directly bound as in the related art. According to the present invention, the tow rope 85 is attached to the tow rope fitting 21 accommodated in the roller receiving frame 41. Since the pulling rope 85 is bound, the own weight of the tow rope 85 is received by the roller receiving frame 41, so that the own weight does not act on the arm 15, so that the arm 15 can rotate smoothly and easily. As described above, as described above, even when the settling basin rake distance is long and the length of the tow rope 85 is long, the load of bending due to the heavy own weight of the tow rope 85 is received by the roller receiving frame 41. The self-weight does not act on the long hole 17 of the arm 15 and does not hinder the rotation of the arm 15, so that the rotation of the arm 15 is smooth.

The rotation of the arm 15 is such that the scraper 79 is closed at the position A indicated by the solid line (the scraping truck 5 is squeezed during forward movement), and at the position B indicated by the one-dot chain line. Is opened (Scraper 79 when scraper truck 5 goes home)
In a state separated from the pond bottom 71) via the tow rope fitting 21.
The position A and the position B at which 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 5 (the maximum height position of the arm 15 indicated by the two-dot chain line). Have 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 alternatively, the stopper 51 may be attached to the right arm 15a and the left arm 15b. May be attached to any of the surfaces.

This stopper 51 has two ends with an angle of 90 degrees.
° and is fixed perpendicular to the center line Ca of the arm 15. Further, the arm 15 is rotated, and the closing stopper receiver 53 which comes into contact with the stopper 51 at the position A shown by the solid line and is positioned and comes into contact with the stopper 51 at the position B shown by the one-dot chain line. A stopper stopper 55 is provided on the frame 11 of the scraper truck 5. The closing stopper receiver 53 and the opening stopper receiver 55 are configured such that the arm 15 has an arc-shaped angle of 90 °.
It is attached parallel to the frame 11 so that the contact surface with the stopper 51 contacts with a plane when rotating. Thus, the stopper 51 and the closing stopper receiver 5
3 and the opening stopper receiver 55 are separated by a predetermined distance from the arm support pin 13 serving as the center of rotation, and are brought into contact with each other in a plane, so that the open / close position is ensured, reliability is improved, and manufacturing is facilitated. Has become. In addition, since the stopper is provided at a position separated by a predetermined distance from the center of rotation of the arm, a small reaction force may be received, and the configuration is simplified.

The operation of the scraper truck 5 configured as described above will be described. When the settled sludge 73 on the pond bottom 71 is swept, the drive motor 93 is turned clockwise (FIG. 11).
(In the direction of arrow Kw shown in FIG. 3)
The arm 15 is rotated to the left as shown by the solid line in FIG. The arm 15 is towed by the tow rope 85, rotates about the arm support pin 13, and the stopper 51 attached to the arm 15 abuts the closing stopper receiver 53, and moves from the point B to the position A. It is positioned in an arc of 90 ° rotation. At this time, the tow rope fitting 29 attached to the arm 15 slides up and down from the position B to move horizontally to reach the position A via the position C, and to reach the arm 15. Scraper 79 attached to
Is in the closed position.

In this state, when the drive motor 93 is further rotated, the scraper truck 5 goes forward with the scraper 79 closed and scrapes the settled sludge 73 on the bottom 71 of the pond to form a sludge pit. Pour into 81. When the scraper 79 moves forward and scrapes the settled sludge 73 on the pond bottom 71 and reaches the sludge pit 81, the drive motor 93 of the tow rope 85 rotates counterclockwise by a limit switch (not shown). The arm 15 rotates about the arm support pin 13, and the stopper 51 attached to the arm 15 abuts on the opening stopper receiver 55, and rotates from the point A to the point B in an arc by an angle of 90 °. Is positioned. At this time, the arm 15 slides in the vertical direction from the position A in the same manner as described above, thereby moving horizontally to reach the position B via the position C and 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 truck 5 is scraped by the scraper 79.
Is opened, and the scraper 79 goes home away from the pond bottom surface 71.

In the above description, the arm 15 has an angle θa in an arc shape between the point A and the point B around the arm support pin 13 of the arm 15 as shown in FIG.
The towing rope metal part 21 slides vertically in the long hole 17 of the arm 15 with little frictional resistance even when passing through the point C, and the towing rope metal part 21 is turned horizontally. Move while maintaining the state. Therefore, arm 1
The arm 5 rotates without receiving a vertical load.
5 can be smoothly rotated.

The tow rope fitting 29 includes an oilless metal 27, a tow rope receiving roller pin 25, and
Since the tow rope 15 is swingably supported by the roller receiving frame 41 via the tow rope receiving roller 37, the weight of the tow rope 15 does not act on the arm 15, so that the rotation of the arm 15 rotates with a lighter force. , Become smooth. In addition, tow rope 8
5 moves in the horizontal direction, so that the wrapping length does not change, and is constant, so that a length adjusting device associated with vertical movement as in the related 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-described embodiment, the connection between the elongated hole 17 of the arm 15 and the tow rope receiving roller pin 25 is described with reference to FIGS.
The right-hand arm 15a is provided on both sides of the tow rope fitting 21 with the longitudinal axis of the tow rope 85 straight.
And a left arm 15b.

FIG. 7 is a perspective view showing a conceptual configuration of a first tow rope fitting 21A which is another first embodiment of the tow rope fitting 21. As shown in FIG. The first tow rope fitting 21A has a configuration in which a fulcrum of a first tow rope receiving roller pin 25A made of a stepped round bar is provided between the right arm 15a and the left arm 15b. The small diameter portion 25a of the first tow rope receiving roller pin 25A is inserted into the long hole 17 of the right arm 15a and the left arm 15b. Further, on both sides of the first tow rope receiving roller pin 25A, a tow rope 85 is attached by a turnbuckle or the like as in FIG. In the above configuration, a first bar made of a stepped round bar is used.
The towing rope receiving roller pin 25A may use a bearing made of a material such as an oilless metal. Further, the first tow rope receiving roller pin 25A may be configured by a round bar and a cylindrical pipe, and a bearing such as an oilless bearing may be inserted between them. Further, by increasing the length of the first tow rope receiving roller pin 25A, the roller receiving frame 4
Instead of 1, it may be housed in a pin receiving frame of the same structure to receive the own weight of the tow rope 85.

FIG. 8 shows a second tow rope fitting portion 21B of a second embodiment which is a modification of FIG. 7, and the second tow rope fitting portion 21B comprises a right arm 15a and a left arm 15b.
A rope fitting 25b having an elliptical hollow and long cylindrical shape is disposed outside. Rope bracket 25b and right arm 15
The second tow rope receiving roller pin 25B penetrates the long hole 17 of the left arm 15a and the left arm 15b. A pulling rope 85 is attached to both sides of the rope fitting 25b by a turnbuckle or the like as in FIG. The second tow rope receiving roller pin 25B may use a bearing made of a material such as an oilless metal, as described above. Further, the length of the second tow rope receiving roller pin 25 </ b> B may be lengthened and housed in a pin receiving frame having the same structure instead of the roller receiving frame 41 to receive the own weight of the tow rope 85.

FIG. 9 shows a third tow rope fitting 21C of a third embodiment which is a modification of FIG. 8, and the third tow rope fitting 21C is composed of a right arm 15a and a left arm 15b.
Instead, the integrated first arm 15d is disposed inside the rope fitting 25b. Also, the first arm 1
5d has a long hole 17 having the same shape as the right arm 15a and the left arm 15b. Rope fitting 25b,
A third tow rope receiving roller pin 25C passes through the long hole 17 of the first arm 15d. The third tow rope receiving roller pin 25C may use a bearing made of a material such as an oilless metal as described above. Also,
The length of the second tow rope receiving roller pin 25 </ b> B may be lengthened and housed in a pin receiving frame having the same structure instead of the roller receiving frame 41 so as to receive the own weight of the tow rope 85.

FIG. 10 shows a fourth towed rope fitting 21D of a fourth embodiment which is another modified example. The fourth towed rope fitting 21D is an integral second arm 15 having no slot 17.
e, a fourth tow rope receiving roller pin 25D supported by an oval hollow long cylindrical rope fitting 25d is disposed before and after the second arm 15e. The outer diameter of the fourth tow rope receiving roller pin 25D is the second arm 15.
e, and contacts the side surface Sd of the e.
It is configured to transmit to the arm 15e. At this time, the fourth tow rope receiving roller pin 25D is connected to the second arm 15
It is even better if it slides vertically with respect to e and rotates. 4th tow rope receiving roller pin 25D
Is rotated with respect to the second arm 15e. A pulling rope 85 is attached to both sides of the rope fitting 25d by a turnbuckle (not shown) or the like. In addition, the length of the fourth tow rope receiving roller pin 25D is increased, and the fourth tow rope receiving roller pin 25D is stored in a pin receiving frame having the same structure instead of the roller receiving frame 41.
The pulling rope 85 may receive its own weight.

In the other embodiment described above, similarly to the arm sliding surface roller 23 of the tow rope fitting portion 21, the first tow rope receiving roller pin 25A having a small frictional resistance in the long hole 17 of the arm 15 or the 2 A bearing such as a tow rope receiving roller pin 25B is inserted slidably in the up-down direction. Thereby, the weight of the towing rope 85 does not act on the arm 15, so that the arm 15 can rotate smoothly and easily. Further, without providing the elongated hole 17 in the arm 15, the fourth tow rope receiving roller pin 25D having a small frictional resistance is disposed before and after the second arm 15e, and the tow rope is brought into contact when the second arm 15e rotates. 85 traction force is transmitted. Thus, with a simple configuration, the own weight of the tow rope 85 does not act, and the second force is generated by the tow force of the tow rope 85.
The arm 15e can rotate smoothly and easily.

As described above, the present invention is provided with a tow rope fitting which is tied to the tow rope and slides up and down with respect to the arm. The arm can be smoothly rotated with a simple configuration without directly receiving its own weight or tension, and the opening and closing work and scraping work of the scraper can be reliably performed, and it is possible to reduce the weight and cost. I have.

[0032]

As described above, according to the scraper opening / closing device of the present invention, the arm that rotates in an arc shape does not directly lift the own weight of the tow rope, so that a smooth arc shape is achieved. , And the opening and closing of the scraper can be performed reliably and easily, and the reliability of the scraper can be improved. In addition, even if the settling basin's scraping distance is long and the deflection of the tow rope due to its own weight increases, the height of the tow rope can be kept constant and the arm can be rotated. In addition to the effect that can be performed, an effect that can be widely applied is obtained. Since the structure of the scraper opening / closing device is simplified and the weight is reduced, the reliability of the device can be increased and the cost can be reduced. With the stopper attached to the arm, the open / close position of the scraper can be reliably determined, so that the reliability of the open / close operation of the scraper can be improved.

[Brief description of the drawings]

FIG. 1 is a side view of a scraper opening / closing device according to the present invention.

FIG. 2 is a partially enlarged side view of the scraper opening / closing device according to the present invention.

FIG. 3 is a partially enlarged plan view of the scraper opening / closing device according to the present invention.

FIG. 4 is a partially enlarged front view of the scraper opening / closing device according to the present invention.

FIG. 5 is a partial configuration diagram of an arm and a tow rope binding unit according to the present invention.

FIG. 6 is an explanatory diagram of a tractive force acting on the arm according to the present invention.

FIG. 7 is a perspective view showing a conceptual diagram of the configuration of the first embodiment in the tow rope fitting portion of the present invention.

FIG. 8 is a perspective view showing a conceptual configuration diagram of a second embodiment of the towing rope fitting part of the present invention.

FIG. 9 is a perspective view showing a conceptual diagram of a configuration of a third embodiment of a tow rope fitting of the present invention.

FIG. 10 is a perspective view showing a conceptual configuration diagram of a fourth embodiment in the tow rope fitting portion of the present invention.

FIG. 11 is a side view showing the entire configuration of a conventional underwater traction type sludge scraper.

FIG. 12 is a plan view showing the entire configuration of a conventional underwater traction type sludge scraper.

FIG. 13 is an explanatory diagram of a tractive force acting on a conventional arm.

[Explanation of symbols]

1 ... scraper scraper opening and closing device, 5 ... scraper cart, 7
…… trolley frame, 9 …… wheel, 11 …… frame, 1
5 ... arm, 17 ... long hole, 21 ... tow rope fitting part, 23 ... arm sliding surface roller, 25 ... tow rope receiving roller pin, 27 ... oilless metal, 29 ...
... tow rope fittings, 31 ... turnbuckle, 37 ...
Tow rope receiving roller, 41 ... Roller receiving frame, 43 ...
... Gate-shaped stand, 51 ... Stopper, 53 ... Stopper stopper for closing, 55 ... Stopper receiver for opening, 71 ... Bottom of pond, 75 ... Sludge sludge, 79 ... Scraper, 81 ...
… Drainage pit, 85… Tow rope, 95… Driving motor

Claims (5)

[Claims] 1. A scraper opening / closing device of a sludge scraper for opening and closing a scraper by rotating an arm with a towing rope, wherein the towing rope fitting is tied to the towing rope and slides vertically with respect to the arm. A scraper opening / closing device characterized by comprising: 2. The scraper opening / closing device according to claim 1, wherein the tow rope fitting comprises a tow rope receiving roller inserted into an elongated hole provided in the arm. 3. A receiving frame for guiding a tow rope fitting horizontally.
A scraper opening / closing device according to any of the preceding claims. 4. The scraper opening / closing device according to claim 1, wherein the tow rope fitting has a bearing on a sliding surface. 5. The scraper according to claim 1, wherein a stopper for positioning the opening and closing of the scraper is provided on the arm.
A scraper opening / closing device according to any of the preceding claims.