JP2004033857A - Scum scraper - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a scum scraper capable of efficiently scraping scum. <P>SOLUTION: The scum scraper 1 scrapes the scum floating on a water surface 10b by moving scrapping blades 12 from an initial position along the water surface in a vessel and resets the moved scrapping blades 12 to the initial position, in which the scrapping blades 12 are parted upward from the water surface 10b in resetting the scrapping blades 12 to the initial position after scrapping of the scum and therefore water is not scraped in the resetting operation of the scrapping blades 12 and the cost of driving is reduced. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
TECHNICAL FIELD The present invention relates to a floating object scraping device that scrapes floating objects floating on the water surface in a tank.
[0002]
[Prior art]
BACKGROUND ART Conventionally, as a device for scraping a floating object such as a scum floating on a water surface of a tank such as a sedimentation basin, for example, as disclosed in Japanese Patent Application Laid-Open No. 8-267059, etc., between a bottom surface of a tank and a water surface. Attach a plurality of plate-shaped flights (crawling blades) to an endless chain stretched over the shore, and circulate these flights around a circular orbit such that one side follows the bottom of the tank and the other side follows the water surface of the tank. There is known a so-called chain-flight type scraping device that scrapes a floating object such as a scum floating on the water surface.
[0003]
[Problems to be solved by the invention]
However, in the above-described chain flight type scraping device, after moving along the water surface from the initial position and scraping the suspended matter, the scraping blade returns to the initial position while scraping the sludge at the bottom of the tank or the like. Many operations are required to scrape water in areas other than the water surface where floating substances are generated, requiring a lot of driving power, and also serving to scrape both floating substances and sludge, so there are many restrictions on installation. Become.
[0004]
The present invention has been made in view of the above problems, and has as its object to provide a device for scraping a floating object that can efficiently scrape the floating object.
[0005]
[Means for Solving the Problems]
The floating object scraping device of the present invention moves the scraping blade from the initial position along the water surface in the tank, scrapes the floating material floating on the water surface, and returns the moved scraping blade to the initial position. In the device for scraping a floating object, when the scraping blade is returned, the scraping blade is separated upward from the water surface.
[0006]
According to the scraping device of the floating material of the present invention, after the scraping of the floating material, when the scraping blade returns to the initial position, since the scraping blade is separated upward from the water surface, in the return operation, There is no need to scrape water, and driving costs can be reduced.
[0007]
Here, a scraping blade supporting means for swingably supporting the scraping blade about a horizontal axis orthogonal to the moving direction of the scraping blade, a scraping cradle on which the scraping blade supporting means is installed, and a scraping cradle A driving means for reciprocating in parallel with the water surface of the tank, a guided portion provided on the scraping blade or the scraping blade supporting means supporting the scraping blade, and extending in the reciprocating direction of the scraping stand, As a first swinging position where the scraping blade hangs down below the horizontal axis, the scraping blade can be moved in the forward movement direction along the water surface, and at a position where the scraping blade is swung upward from the first swinging position. Guide means for guiding the guided portion movably in the backward movement direction.
[0008]
According to this, at the time of forward movement of the raking cradle, the guide means can move in the forward direction along the water surface with the raking blades hanging down at the first swing position. Is suitably scraped by the scraper blades.
[0009]
On the other hand, when the raking cradle moves backward, the guided portion is guided by the guiding means so that the raking blades can be swung upward, and can be moved in the reversing direction. The wings are spaced upward from the surface of the tank. For this reason, at the time of the backward movement, the contact between the scraping blade and the floating material and the water in the tank which are swept up at the time of the forward movement is reliably prevented.
[0010]
Here, it is preferable to include a scraping blade swing limiting member that is installed on the scraping cradle and that limits the swinging of the scraping blade from the first swing position in the backward movement direction.
[0011]
During forward movement, even if the scraping blade receives force in the backward movement direction due to water, floating material, etc., it will not swing in the backward movement direction from the first swing position, so the scraping of the floating matter will be sure. Done.
[0012]
In addition, the guide means has an opening formed in the lower surface at a predetermined distance in the reciprocating direction at which the guided part can reciprocate, and guides the guided part entering through the opening so as to be movable in the reciprocating direction. A first rocking member extending downward from the edge of the opening in the reversing direction side of the opening toward the lower side of the opening by the guide, and pivotally supported in a vertically slidable manner; The lower surface of the first swinging member contacts the guided portion when the scraping blade located at the moving position moves forward, and the guided portion moves when the scraping blade located at the first swinging position returns. Makes the first swinging member take a posture in which the first swinging member is brought into contact with the upper surface of the first swinging member and the guided portion can be guided to the guide body through the opening. And a first swing limiting member that limits swing to the side.
[0013]
Thereby, when the guided portion of the scraping blade set to the first swing position moves forward and reaches below the opening, the guided portion of the scraping blade contacts the first swing member, Since the first swinging member swings upward and escapes, the movement of the scraping blade is not hindered, the scraping blade reaches before the opening, and the floating object is further scraped to a predetermined position.
[0014]
On the other hand, when the guided portion of the scraping blade, which is at the first swinging position, reaches below the opening at the time of the return of the scraping gantry, the first swinging member is moved by the scraping blade. The guide portion is received thereon, and the first swing member is restricted from swinging downward by the first swing limiting member, and along with the return movement, the guided portion is moved along the slope of the first swing member. Since the guide is guided to the guide through the opening, the scraping blade is swung upward about the horizontal axis, and the scraping blade is separated above the water surface of the tank. Further, when the guided portion passes below the guide body through the adjacent opening, the scraping blades again drop down to the first swing position, and the floating material is moved by performing the forward movement of the scraping gantry. Raised again by the raking wings.
[0015]
That is, the provision of such a guide means suitably realizes the device for scraping a floating object according to the present invention.
[0016]
Here, it is preferable to include first urging means for urging the first swinging member downward.
[0017]
This ensures that the first swinging member is maintained in the predetermined posture limited by the first swinging limiting member as long as no external force or the like is applied. Guidance to the body is performed more reliably.
[0018]
In addition, the guide extends from the edge of the opening in the forward movement direction side to above the opening, is pivotally supported in the up-down direction, and is capable of covering the opening from above. A second swinging member, a second biasing means for biasing the second swinging member upward, and when the scraping blade returns in a state where the guided portion of the scraping blade is guided by the guide body. The upper surface of the second swinging member contacts the guided portion of the scraping blade and the scraped blade moves forward with the guided portion of the scraping blade guided by the guide body. The guided portion abuts on the lower surface of the second swinging member, and the guided portion can be guided below the guide body through the opening, and the second swinging member is further swung upward. And a second swing limiting member for limiting the pressure.
[0019]
Thereby, when the guided portion of the scraping blade is moved back in a state where the guided portion of the scraping blade is guided by the guide body, the guided portion is guided when the guided portion of the scraping blade reaches above the opening of the guide body. The portion abuts on the second swinging member, and the second swinging member is swung downward to cover the opening and form a guide path on the opening, so that the guided portion exits downward from the opening. Without passing through this opening, it reaches the return direction side. Then, after passing through the guided portion, the second swinging member returns to the predetermined swinging position limited by the second swing limiting member by the urging by the second urging means. Further, when the guided portion of the scraping blade moves forward in a state where the guided portion of the scraping blade is guided by the guide body and the guided portion of the scraping blade guided by the guide body reaches the opening, the guided portion becomes Guided gradually downward through the opening along the upper surface of the first swing member, the scraping blade is smoothly returned to the first swing position.
[0020]
In addition, at this time, the entrance to the guide body on the forward direction from the opening is closed by the second swing member whose upward swing is limited by the second swing limiting member, and the second swing Since the guided portion can be guided below the guide body through the opening along the lower surface of the member, the guided portion is again guided from the opening to the guide body on the forward movement direction side. Thus, the scraping blade can be returned downward from the opening without returning to the first swing position.
[0021]
Further, it is preferable that a plurality of combinations of the raking blades and the raking blade supporting means for supporting the raking blades are arranged side by side in the reciprocating direction with respect to the raking stand, and the guided portion is provided for each combination. According to this, each of the scraping blades is rocked, and the floating material on the water surface of the tank is shared by the plurality of scraping blades and is scraped toward the forward movement side, so that the distance of the reciprocating movement of the scraping cradle is reduced. Can be shortened.
[0022]
In addition, a plurality of combinations of the raking blades and the raking blade supporting means for supporting the raking blades are arranged in parallel in the reciprocating direction with respect to the raking stand, and the guided portion is provided for at least one of the combinations. And a connecting means for interlocking the swinging operations of the scraping blades with each other.
[0023]
According to this, the scraping blade according to the combination in which the guided portion is provided is swung by the guiding means, and in conjunction with this, the scraping blade according to the combination in which the guided portion is not provided is also connected to the coupling means. The floating material is shared by the plurality of scraping blades and can be scraped toward the forward movement side, and the distance of the reciprocating movement of the scraping gantry can be shortened. Further, since the number of guided parts can be reduced as compared with the number of combinations, the configuration of the guiding means is not complicated, and the cost can be reduced.
[0024]
Further, the driving means is a gear that is rotated forward and reverse about an axis perpendicular to the reciprocating direction of the scraping gantry, and a gear that extends in the reciprocating direction of the scraping gantry and is fixed to the scraping gantry so as not to bend and meshes with the gear. And a possible meshing member. According to this, the scraper gantry can be easily and suitably reciprocated.
[0025]
In addition, it is preferable to provide a gutter-like member having an opening at an upper portion and through which a floated substance that has been swept can flow.
[0026]
According to this, since the floated substance that has been raked flows into the gutter-shaped member, the floatable substance can be discharged to the outside of the tank in a suitable manner.
[0027]
Preferably, the scraping blade is formed of an elastic material, and the gutter-like member is provided at a position where the scraping blade passes so that the opening protrudes above the water surface.
[0028]
According to this, since the opening of the gutter-like member projects above the water surface, the liquid in the tank does not flow into the gutter-like member at normal times. On the other hand, when the scraping blades reach the gutter-like member while raking the levitating material, the scraping blades, which are elastic materials, are deformed and get over the open end of the gutter-like member, and the floating material scraped at this time is moved. It selectively flows into the gutter-like member.
[0029]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, a preferred embodiment of a device for scraping a floating object according to the present invention will be described in detail with reference to the accompanying drawings. In the description of the drawings, the same or corresponding elements have the same reference characters allotted, and overlapping description will be omitted.
[0030]
FIG. 1 is a schematic front view showing a device for scraping a floating object according to the first embodiment, and FIG. 2 is a schematic side view showing a device for scraping a floating object according to the first embodiment.
[0031]
As shown in FIG. 1, the floating object scraping device 1 of the present embodiment scrapes a floating object such as a scum floating on a water surface 10b of a tank 10 toward the right side in the drawing, and scrapes the floating object. A ladder-shaped raking platform 20 in which a plurality of approaching flights (cracking blades) 12 are arranged in a horizontal direction, and a driving device (drive) for reciprocating the raking platform 20 substantially parallel to the water surface 10b of the tank 10 Means) 50, and a scum pipe (gutter-like member) 5 into which the scraped-up floating material flows.
[0032]
As shown in FIGS. 1 and 2, the raking platform 20 has two parallel driving direction members 21 extending in the reciprocating direction of the raking platform 20, and the two driving direction members 21. A plurality of parallel members 22 that are vertically intersected and separated from each other by a predetermined distance. As shown in FIG. 3, the parallel member 22 and the driving direction member 21 are fixed by screwing a coupling plate 22 a fixed to the parallel member 22 and a coupling plate 21 a fixed to the driving direction member 21. It is connected and has a ladder shape.
[0033]
At both ends of the parallel member 22, main rollers 24 rotatable around the axis of the parallel member 22 are provided. The parallel member 22 is provided with two arms (scrawling blade supporting means) 25 that can swing around the axis of the parallel member 22 and are separated from each other in the axial direction of the parallel member 22. Then, as shown in FIGS. 3 and 4, the coupling plate 22a is moved from the first swing position where the arm 25 hangs vertically below the parallel member 22 to the return side (the left side in FIG. 4). Arm stopper (a scraping blade swing limiting member) 26 as a projection for limiting the swing of the blade.
[0034]
At the tip of each arm 25, as shown in FIGS. 1 and 2, a flight (scrape blade) that extends in the axial direction of the parallel member 22 and scrapes a floating object floating on the water surface 10b of the tank 10. 12 are installed. The flight 12 is made of an elastic material such as rubber and is deformable. As shown in FIG. 2, the flight 12 is installed over substantially the entire width of the water surface 10 b of the tank 10.
[0035]
As shown in FIG. 3, the arm 25 has a bar 23 projecting toward the outer side in the axial direction of the parallel member 22 to substantially the same position as the main rollers 24 at both ends of the parallel member 22, as shown in FIG. And a sub-roller (guided portion) 27 rotatable around the axis of the bar 23. The auxiliary roller 27 may be provided on the flight 12 via a bar or the like.
[0036]
As shown in FIG. 1, the driving device 50 includes a motor 51 rotatable in forward and reverse directions, a chain 52 that transmits driving force by the motor 51, and a driving force transmitted by the chain 52 that reciprocates in a horizontal direction. A chain 53 for transmitting the converted driving force to the driving direction member 21 via the fixing plate 55, and a tighter 54 for adjusting the slack and the like of the chain 53. Reciprocate left and right.
[0037]
Further, as shown in FIGS. 2 and 3, the driving device 50 includes a gutter-shaped main guide rail 82 having a rectangular cross section on a pair of side walls 10 c parallel to the reciprocating direction of the scraper 20 in the tank 10. ing. The main guide rails 82 are installed parallel to the water surface 10b of the tank 10 so that the opening side of the gutter faces the side of the scraper gantry 20, and the main rollers 24 at both ends of the parallel member 22 of the scraper gantry 20. Is always accommodated in the main guide rail 82. As shown in FIGS. 3 and 4, the height of the main guide rail 82 from the water surface 10b is such that the vertical center of the flight 12 when the arm 25 of the raking base 20 is at the first swing position. The height is set so as to be substantially immersed in the water surface 10b of the tank 10. Then, the main guide rail 82 guides the raking platform 20 driven by the chain 53 and the like to reciprocate in parallel with the water surface 10b of the tank 10.
[0038]
Here, the scraping device 1 of the present embodiment includes a guide unit (guide means) 80 for adjusting the height of the flight 12 in accordance with the direction of movement of the scraping gantry 20. The guide unit 80 is provided below the main guide rail 82 on the side wall 10c with a gutter-shaped sub-guide rail (guide body) 83 having a rectangular cross section like the main guide rail 82. The height of the sub-guide rail 83 from the water surface 10b is higher than the position of the sub-roller 27 when the arm 25 is at the first swing position. It is housed in the groove (the imaginary line in FIG. 3) and can be guided.
[0039]
As shown in FIGS. 1 and 4, the lower roller 83 advances and retreats between the inside of the sub guide rail 83 and the outside (downward) of the sub guide rail 83 on the lower flange 83a of the lower surface of the sub guide rail 83. An enabling opening 84 is formed. The openings 84 are formed in the reciprocating direction by one more than the number of the parallel members 22 at the same interval as the horizontal interval between the parallel members 22 of the scraping gantry 20.
[0040]
As shown in FIG. 4, the guide unit 80 extends downwardly below the opening 84 at the lower flange 83 a of the sub-guide rail 83 near the edge of the opening 84 on the return direction side. A lower guide flap (first swing member) 85 is provided. The lower guide flap 85 has a size corresponding to the opening 84 and is pivotally supported by a shaft 90 below an edge farther from the scum pipe 5 so as to be able to swing vertically.
[0041]
Further, the guide unit 80 has a stopper (first swing limiting member) 86 on the lower flange 83a for limiting the lower guide flap 85 from swinging downward beyond a predetermined angle from the horizontal position. A tension spring (first urging means) 87 for urging the lower guide flap 85 downward is provided. The lower guide flap 85 normally moves downward unless external force is exerted by the auxiliary roller 27 or the like. And the swing is stopped by the stopper 86.
[0042]
Here, when the arm 25 is in the first swinging position in which the arm 25 hangs down below the parallel member 22 when the scraper gantry 20 moves backward (moves to the left in the drawing), The sub-roller 27 can contact the upper surface of the lower guide flap 85, and further, as shown in FIG. 5, the scraper gantry 20 moves forward with the arm 25 in the first swing position (see FIG. 5). 6, the sub-roller 27 of the arm 25 is set at an angle at which it contacts the lower surface of the lower guide flap 85 as shown in FIG.
[0043]
When the lower guide flap 85 is set at a predetermined angle as shown in FIG. 4, the sub roller 27 of the arm 25 at the first swing position returns below the sub guide rail 83. When moving, as shown in FIG. 7, the sub-roller 27 is received on its upper surface and guided obliquely upward and guided into the sub-guide rail 83 through the opening 84. Conversely, the sub-guide rail 83 When the sub-roller 27 guided above moves forward from the left side of the opening 84 in the drawing, the sub-roller 27 is received on the upper surface thereof, guided diagonally downward, and moved from the sub-guide rail 83 through the opening 84 to the sub-roller 27. It is guided outside the guide rail 83.
[0044]
Returning to FIG. 4, an upper guide flap (second swinging member) extending upward from the opening 84 is provided near the forward edge of the opening 84 on the lower flange 83 a of the sub guide rail 83. (Moving member) 88.
[0045]
The upper guide flap 88 is large enough to cover the opening 84, and is pivotally supported by a shaft 91 below the forward edge of the lower flange 83a so as to swing up and down. ing. Further, the upper guide flap 88 is urged upward by a compression spring (second urging means) 89. When no external force is applied, the upper guide flap 88 normally swings upward to rotate the sub guide rail. The upper flange 83 (second swing restricting member) 83b contacts the upper flange 83b and is restricted so as not to swing upward any further. When the upper guide flap 88 swings downward, when it comes to a horizontal state covering the entire opening 84, the upper guide flap 88 contacts the lower flange 83 a of the edge of the opening 84, and further downward. Swing is limited.
[0046]
Then, as shown in FIG. 8, the upper guide flap 88 moves backward (moves leftward in the drawing) with the sub-roller 27 of the arm 25 being guided in the sub-guide rail 83 from the left side of the opening 84 in the drawing. When the sub-roller 27 is in contact with the sub-roller 27, the sub-roller 27 is pushed by the returning sub-roller 27 and oscillated downward to cover the opening 84, as shown in FIG. The sub-roller 27 is allowed to reach the sub-guide rail 83 on the reciprocating side through the opening 84 as shown in FIG. Conversely, when the auxiliary roller 27 of the arm 25 moves forward (moves rightward in the figure) from the left side of the opening 84 in a state where the auxiliary roller 27 of the arm 25 is guided in the auxiliary guide rail 83, as shown in FIG. The auxiliary roller 27 serves as a cover for blocking the guide path so that the auxiliary roller 27 does not jump over the opening 84 and reenter the auxiliary guide rail 83 in the forward movement direction. The auxiliary roller 27 is guided below the auxiliary guide rail 83 via the.
[0047]
As shown in FIG. 11, the scum pipe 5 extends in a horizontal direction orthogonal to the reciprocating direction of the scraper gantry 20 along the water surface 10b, and includes a gutter portion 5a having a U-shaped cross section with an open upper portion. ing. On the reciprocating side (left side in the figure) of the raking platform 20 at the upper edge of the gutter portion 5a, there is provided an introduction slope portion 5b extending slightly downward on the reversing side of the raking platform 20. On the forward side (the right side in the figure) of the scraper gantry 20, there is provided a retreating slope 5 c extending slightly downward on the forward side of the scraper gantry 20. As shown in FIG. 11 (a), the scum pipe 5 has the opening 12 of the gutter 5a on the water surface 10b where the rightmost flight 12 (the most forward flight 12) shown in FIG. Are installed so that both upper edges thereof are slightly above the water surface 10b.
[0048]
Next, the operation of the device 1 for scraping a floating object will be described.
[0049]
First, as shown in FIG. 4, the arm 25 of the raking platform 20 is located at the first swing position, and the sub roller 27 is located outside (below) the sub guide rail 83. A description will be given of a state in which the flight 12 can scrape a floating object floating on the water surface 10b of the tank 10.
[0050]
First, from this state, the motor 51 is rotated in the counterclockwise direction in FIG. 1, and the scraper gantry 20 is moved by the chains 52 and 53 in the white arrow direction (the right side in the figure), that is, in the scum pipe 5 direction (forward movement). . As a result, the flying object is raked toward the forward movement direction by each flight 12 (see FIG. 4).
[0051]
Further, as shown in FIG. 11A, the flight 12 in the most forward movement direction moves forward toward the scum pipe 5 in the right direction in the drawing while scraping the floating object 7, as shown in FIG. 11B. 11c, the floating object 7 rides on the introduction slope 5b while climbing over the upper edge of the gutter portion 5a and enters the gutter portion 5a as shown in FIG. Then, as shown in FIG. 11 (d), it retreats from the gutter part 5a via the retreat slope part 5c. The floating material 7 collected in the scum pipe 5 in this manner is discharged to the outside via a discharge line (not shown). Thereby, the floating material 7 can be selectively and reliably discharged from the tank 10. In addition, since the upper edge of the gutter 5a is located above the water surface, water and the like in the tank 10 do not flow into the gutter 5a except during the passage of the flight 12. For this reason, the amount of water discharged through the scum pipe 5 is also reduced, and the processing load on the object to be processed including floating substances discharged through the scum pipe 5 is reduced.
[0052]
As shown in FIG. 4, when the flight 12 rakes up a floating object, the arm 25 receives a clockwise moment from the floating object, water, or the like. Since the swinging in the direction is prevented, it is possible to surely lift the floating object.
[0053]
When such scraping is continued, as shown in FIG. 5, the arm 25 or the like reaches the vicinity of the adjacent opening 84 on the forward movement direction side. At this time, the sub-roller 27 of the arm 25 comes into contact with the lower surface of the lower guide flap 85, but the lower guide flap 85 can swing upward about the shaft 90, as shown in FIG. At this time, the arm 25 swings upward, and the arm 25 passes under the opening 84 without any obstacle, and continues to scrape the floating object in the forward movement direction.
[0054]
After the sub-roller 27 has passed, the lower guide flap 85 is urged downward by the tension spring 87, so that it immediately swings downward and reliably returns to the original predetermined position.
[0055]
In this manner, after passing under the opening 84 and the state shown in FIG. 4 is obtained, the motor 51 shown in FIG. 1 is rotated clockwise, and the scraper gantry 20 is moved in the black arrow direction. Then, a return movement for returning the scraping gantry 20 to the original position is started.
[0056]
Then, the arm 25 and the like again reach the opening 84. However, as shown in FIG. 7, this time, the sub-roller 27 of the arm 25 comes into contact with the upper surface of the lower guide flap 85, and this lower guide flap 85 The lower roller 85 is further restricted by the stopper 86 so that the sub-roller 27 is guided to the upper surface of the lower guide flap 85 as the scraper gantry 20 moves back to the left in the drawing. Then, it rises and enters into the sub guide rail 83 through the opening 84.
[0057]
Then, when the scraping gantry 20 further moves leftward in the figure, as shown in FIG. 10, the sub-roller 27 of the arm 25 travels in the sub-guide rail 83 and moves leftward in the state as it is. , And the movement toward the next opening 84 on the return direction side is continued.
[0058]
At this time, the arm 25 is tilted counterclockwise in the backward direction with respect to the first swinging position vertically downward, and the flight 12 is separated from the water surface 10b of the tank 10 by a predetermined distance. Since the ascending pedestal 20 is moved upward, the scraping cradle 20 does not come into contact with the levitation material that has been raked in the forward movement and return the levitation material in the direction opposite to the forward movement direction in the backward movement of the scraping gantry 20 thereafter. Further, at this time, since the flight 12 does not draw water, the power required at the time of this return movement is reduced as compared with the chain flight type scraping device. Further, at this time, the flight 12 is gradually pulled out substantially vertically upward from inside the floating object, so that the stirring and settling of the floating object are suppressed.
[0059]
In this way, the sub-roller 27 travels in the sub-guide rail 83, reaches the upper guide flap 88 of the adjacent opening 84, and travels further in the reversing direction (see FIG. 8). At this time, the auxiliary roller 27 comes into contact with the upper surface of the upper guide flap 88, and as shown in FIG. 9, the upper guide flap 88 can swing downward. At the same time, a passage ahead of the passage is formed by covering the opening 84, and the sub-roller 27 passes over the opening 84 without coming down from the opening 84. After the sub-roller 27 has passed, the upper guide flap 88 is urged by the compression spring 89, so that it swings upward again, comes into contact with the upper flange 83b and stops as shown in FIG. It returns to the state of.
[0060]
Then, after a while after passing through the opening 84, the motor 51 is again rotated counterclockwise as shown in FIG. 1 to start the forward movement of the scraper gantry 20 in the right direction in the figure.
[0061]
Then, the sub roller 27 in the sub guide rail 83 reaches the opening 84. At this time, the sub-roller 27 is gradually guided to the outside of the sub-guide rail 83 through the opening 84 along the slope formed by the upper surface of the lower guide flap 85, as shown in FIG. As shown in FIG. 4, the arm 25 returns to the first vertically downward swinging position, and the floating object can be scraped in the forward movement direction again.
[0062]
As described above, in a series of operations in which the sub roller 27 goes out of the sub guide rail 83, the opening 84 is covered by the upper guide flap 88 at the time of the backward movement, and the sub roller 27 once passes over the opening 84. Since the auxiliary roller 27 reaches the backward movement side (left side in the figure) from the opening portion 84 and subsequently moves forward, the auxiliary roller 27 is gradually moved out of the auxiliary guide rail 83 by the slope formed by the upper surface of the lower guide flap 85. The arm 25 is smoothly returned to the first swing position. Therefore, the flight 12 gradually and smoothly enters the water surface 10b, so that the agitation of the floating object and the like are further suppressed.
[0063]
As shown in FIG. 7, when the sub roller 27 in the sub guide rail 83 moves forward and reaches the opening 84 and is guided downward, the arm 25 is moved to the first swing position only by gravity. Even when it is difficult to return to the position, the entrance of the auxiliary guide rail 83 in the forward direction from the opening 84 is closed by the upper guide flap 88 to prevent the auxiliary roller 27 from entering and the lower surface of the upper guide flap 88 The auxiliary roller 27 of the arm 25 is reliably guided from the auxiliary guide rail 83 without jumping over the opening 84 and entering the auxiliary guide rail 83 again because the auxiliary roller 27 is guided below the auxiliary guide rail 83 by the side. Guided down. This allows the arm 25 to be more reliably returned to the first swing position when the scraper gantry 20 is moved forward, so that the flight 12 is reliably scraped without leaving the flight 12 separated from the water surface 10b. It is possible to get close.
[0064]
By repeating such a series of forward and backward movements, it is possible to prevent a floating object floating on the water surface 10b of the tank 10 from returning in the opposite direction or sinking and re-floating, thereby efficiently moving the floating object. The scum pipe 5 can be scraped toward the moving scum pipe 5 and discharged into the gutter 5a of the scum pipe 5. In addition, since a plurality of flights 12 are provided, and each flight 12 is rocked by this series of operations, the floating object is shared by the plurality of flights 12 and is raked toward the forward side, and is scraped by one flight 12. The distance of the reciprocating movement of the scraping gantry 20 is shorter than in the case of performing the shifting.
[0065]
In addition, as shown in FIG. 2, such a tank 10 usually has slope portions 10d formed on both side edges of a bottom portion, and a chain flight that simultaneously rakes up floating materials on the water surface and sediments on the bottom portion as in the related art. In the scraping device of the type, the width of the flight is made smaller than the width of the tank 10 in accordance with the slope 10d, and the scraping efficiency of the floating material is often deteriorated. However, in the floating object scraping device 1 of the present embodiment, since the flight 12 does not reach the bottom, the width of the flight 12 can be made substantially equal to the width of the tank 10, and the scraping of the floating object is more suitably performed. Is possible.
[0066]
In addition, the floating object scraping device 1 of the present embodiment further requires less rotating power and less sliding power as compared with the chain flight type scraping device. There are few wear members such as sprockets and shoes, the structure is simple, and the cost can be reduced. In addition, the floating material scraping device 1 can easily clean sludge pits and the like formed at the bottom portion in the reversing direction side, and install an inclined plate that increases the efficiency of chemical precipitation in a water supply tank or the like. In addition, when installing, there is no restriction on the installation location such as pipe schema etc., the position of the drive unit can be set freely, and it can be easily installed with few hanging points in the existing tank housing have.
[0067]
Next, a floating object scraping device 2 according to a second embodiment will be described.
[0068]
The first difference between the scraping device 2 of the floating object according to the present embodiment and the scraping device 1 according to the first embodiment is that the driving device 50 uses a motor via a chain 52 or the like as shown in FIGS. The sprocket (gear) 103 to which the rotational driving force from the transmission 51 is transmitted and rotated forward and reverse around a horizontal axis perpendicular to the reciprocating direction of the scraper 20 and the driving direction member 21 as shown in FIGS. And a chain (meshing member) 101 which is fixed via the fixing member 102 so as not to bend, extends in the reciprocating direction of the raking platform 20, and meshes with the sprocket 103.
[0069]
According to this, according to the forward / reverse rotation of the sprocket 103, the raking platform 20 is suitably reciprocated in the extending direction of the driving direction member 21 by the chain 101 meshing with the sprocket 103, and floats in the same manner as in the above embodiment. Objects are scraped and discharged to the scum pipe 5. In particular, in the present embodiment, the chain 53 in the first embodiment is not required, so that the problem of the chain coming off and the like can be reduced, the reliability of the scraping device 2 can be improved, and the play of the chain 53 can be adjusted. The need for a tighter 54 is also eliminated, and the cost is reduced. In addition, the driving method as in the present embodiment is called a pin gear method, which does not require much accuracy such as the installation of the cradle 20 and the chain 101, so that installation and maintenance are easy, and driving in the vicinity of the water surface is easy. Are also suitable. In some cases, a so-called rack and pinion system may be adopted in which a pinion gear is used instead of the sprocket 103 and a rack is used instead of the chain 101.
[0070]
A second difference between the scraping device 2 of the floating object according to the present embodiment and the scraping device 1 according to the first embodiment is that three adjacent arms 25 interlock with the swinging operation of these arms 25. In that the auxiliary roller 27 is provided only on one of the arms 25 connected to each other, and the lower guide 27 of the guide unit 80 is correspondingly provided. The flap 85 and the upper guide flap 88 which do not contribute to the guide of the remaining sub-roller 27 are removed. Here, for convenience, a combination of the arm 25 having the sub-roller 27 and the flight 12 supported by the arm 25 having the sub-roller 27 is referred to as a main driving unit 100, and the arm 25 having no sub-roller 27 and the sub-roller 27 The combination with the flight 12 supported by the arm 25 having no is referred to as a driven portion 105.
[0071]
The connecting member 110 extends in the axial direction of the driving direction member 21, and is rotatably connected to the arm 25 of the main driving unit 100 and the two arms 25 of the driven unit 105 by pins 111. The connecting member 110 may be connected to the flight 12 instead of the arm 25. Further, the number of the driven portions 105 and the number of the driven portions 100 connected to each other are not limited as long as they are one or more.
[0072]
According to this, since the swing operation of the flight 12 of the driven unit 105 is interlocked with the swing operation of the flight 12 of the driven unit 100, the flying object is also scraped by the flight 12 of the driven unit 105. Here, the guide unit 80 may guide only the sub-roller 27 of the main driving unit 100, and is lower than the guide unit 80 corresponding to the sub-roller of the driven unit 105 as compared with the scraping device 1 of the first embodiment. The number of the side guide flaps 85 and the upper guide flaps 88 and the like can be reduced, and the cost and simplification of the guide unit 80 can be reduced.
[0073]
Note that the device for scraping a floating object according to the present invention is not limited to the above embodiment, and various modifications can be made.
[0074]
For example, in the above embodiment, the upper guide flap 88 is provided so as to reliably return the arm 25 to the first swing position at the time of forward movement and to make the flight 12 gradually and smoothly enter the water surface 10b at the time of this return. However, when the amount of the floating object is small, this need not be provided. Even in this case, since the arm 25 attempts to return to the first swing position by gravity, the sub-roller 27 that has reached the opening 84 during the forward movement is guided on the lower guide flap 85 and is out of the sub-guide rail 83. Will be guided to.
[0075]
Further, in the above-described embodiment, the tension guide 87 is provided to bias the lower guide flap 85 downward. However, the lower guide flap 85 is merely biased downward by its own weight. It does not matter.
[0076]
Although the upper guide flap 88 includes the compression spring 89, the upper guide flap 88 may be urged upward simply by the own weight of the counter weight provided at the position of the compression spring 89.
[0077]
In addition, the scraping device 1 of the above-described embodiment includes, as guide means, the auxiliary guide rail 83, the lower guide flap 85, and the stopper 86, but is not limited thereto, and extends in the reciprocating direction of the scraping stand 20. In the forward movement, the flight 12 can be moved as the first swing position, and when returning, the guided portion such as the auxiliary roller 27 can be moved in the position where the flight 12 is swung above the first swing position. Can be guided to. Further, other than this, a mechanism may be provided that allows the flight to be separated upward from the water surface when the flight after the raking returns to the original position.
[0078]
【The invention's effect】
According to the scraping device of the floating material of the present invention, when the scraping blade is returned after the scraping of the floating material, the scraping blade is separated upward with respect to the water surface, so in the returning operation of the scraping blade, The driving cost can be reduced because water is not gathered. For this reason, an efficient floating object scraping device is provided.
[Brief description of the drawings]
FIG. 1 is a schematic front view of a scraping device according to a first embodiment.
FIG. 2 is a schematic side view of the scraping device of FIG. 1;
FIG. 3 is an enlarged view of a portion A in FIG. 2;
FIG. 4 is a schematic diagram showing a state near an opening in FIG. 1 and in which a sub roller is positioned below a sub guide rail.
FIG. 5 is a schematic diagram showing a state in which the sub-roller has advanced in the forward movement direction from the state of FIG. 4 and has reached the vicinity of an adjacent opening;
FIG. 6 is a schematic diagram showing a state in which the sub-roller has advanced from the state of FIG. 5 in the forward movement direction and has reached below the opening.
FIG. 7 is a schematic diagram showing a state in which a sub roller has reached the upper surface of a lower guide flap.
FIG. 8 is a schematic diagram illustrating a state in which a sub roller is positioned in a sub guide rail.
FIG. 9 is a schematic diagram showing a state in which the sub-roller advances in the backward movement direction and passes over the upper guide flap from the state of FIG.
FIG. 10 is a schematic diagram showing a state in which a sub-roller has advanced in a backward movement direction from the state of FIG. 9;
FIG. 11 is a schematic diagram showing a state in which a flight passes over a scum pipe.
FIG. 12 is a schematic front view of a scraping device according to a second embodiment.
FIG. 13 is a schematic side view of the scraping device of FIG. 12;
FIG. 14 is an enlarged view of a portion B in FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Scavenging device of floating material, 5 ... Scum pipe (gutter-like member), 10 ... Tank, 10b ... Water surface, 12 ... Flight (scrolling blade), 20 ... Scrap cradle, 25 ... Arm (scrolling blade support means) ), 26: arm stopper (screw blade swing restriction member), 27: sub-roller (guided portion), 50: drive device (drive means), 80: guide unit (guide means), 83: sub-guide rail ( Guide member), 83b Upper flange (second swing limiting member) 84 Opening, 85 Lower guide flap (first swing limiting member), 86 Stopper (first swing limiting member), 87 Pulling Spring (first biasing means), 88: upper guide flap (second swinging member), 89: compression spring (second biasing means), 101: chain (meshing member), 103: sprocket (gear), 110 ... Connecting member.

Claims (11)

In a floating object scraping device that moves the scraping blades from the initial position along the water surface in the tank to scrape the floating material floating on the water surface, and returns the moved scraping blades to the initial position.
When returning the scraping blade, the scraping blade is separated upward from the water surface. Scraping blade supporting means for swingably supporting the scraping blade around a horizontal axis orthogonal to the moving direction of the scraping blade,
A raking stand on which the raking blade support means is installed,
Driving means for reciprocating the raking base parallel to the water surface of the tank,
A guided portion provided on the scraping blade or the scraping blade support means,
Extending in the reciprocating direction of the scraping gantry, the scraping blade is movable in the forward direction along the water surface as a first swing position hanging down below the horizontal axis, and the scraping blade is Guide means for guiding the guided portion movably in the reciprocating direction at a position swung upward from the first swing position,
The device for scraping a floating object according to claim 1, further comprising: A scraping blade swing limiting member that is installed on the scraping gantry and that limits swinging of the scraping blade from the first swing position in the reciprocating direction. 3. The device for scraping a floating object according to 2. The guide means has an opening through which the guided portion can retreat and is formed on the lower surface at a predetermined distance in the reciprocating direction, and can move the guided portion entering through the opening in the reciprocating direction. Guide body to guide to,
A first swing member that extends downward from the edge of the opening in the return direction side of the opening in the guide body toward the lower side of the opening, and is pivotally supported to be vertically swingable;
When the scraping blade located at the first swing position moves forward, the lower surface of the first swing member contacts the guided portion and the scraping blade located at the first swing position is When returning, the guided portion abuts on the upper surface of the first swinging member, and the posture in which the guided portion can be guided to the guide body through the opening is provided to the first swinging member. A first swing limiting member that limits the swing of the first swing member to a further lower side,
The device for scraping a floating object according to claim 2 or 3, further comprising: The device according to claim 4, further comprising a first urging unit that urges the first swinging member downward. The guide body extends from the edge of the opening on the forward movement direction side to above the opening, is pivotally supported vertically, and can cover the opening from above. A second swing member,
Second urging means for urging the second swinging member upward,
The upper surface of the second swinging member abuts on the guided portion when the scraping blade is moved back while the guided portion is guided by the guide body, and the guided portion comes into contact with the guide body. When the scraping blade moves forward in the guided state, the guided portion comes into contact with the lower surface of the second swing member, and the guided portion can be guided below the guide body through the opening. In a different posture, a second swing limiting member that limits the upward swing of the second swing member further,
The device for scraping a floating object according to claim 4 or 5, further comprising: A plurality of combinations of the raking blades and the raking blade supporting means for supporting the raking blades are arranged in parallel in the reciprocating direction with respect to the raking stand, and the guided portion is provided for each of the combinations. The device for scraping a floating object according to claim 2, wherein: A plurality of combinations of the raking blades and the raking blade supporting means for supporting the raking blades are arranged in parallel in the reciprocating direction with respect to the raking platform, and the guided portion is at least one of the combinations. 7. A device for scraping a floating object according to any one of claims 2 to 6, further comprising a connecting means provided for each of the blades and for interlocking a swinging operation of each of the scraping blades. . The driving means includes a gear that is rotated forward and backward about an axis perpendicular to the reciprocating direction of the scraping gantry, and extends in the reciprocating direction of the scraping gantry and is fixed to the scraping gantry so as not to bend. The scraping device of a floating object according to any one of claims 2 to 8, further comprising a meshing member that can mesh with the gear. The device according to any one of claims 1 to 9, further comprising a gutter-shaped member having an open upper portion, into which the raked floating material can flow. The scraper blade is formed of an elastic material, and the trough-shaped member is provided at a position where the scraper blade passes so that the opening projects above the water surface. The device for scraping a floating object according to claim 10.

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