JP2008114172A - Scraping device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a scraping device which can scrape together deposits and a floating matter without requiring a power source anew while cutting cost. <P>SOLUTION: This scraping device comprises a first flap 22a and a second flap 22b which are arranged swingably in the forward/backward moving directions of an upper scraping trestle 8, a first stopper 23a and a second stopper 23b which restrain the swinging actions of the first flap 22a and the second flap 22b respectively, and a switching bar 30 which extends in the forward/backward moving directions and are connected with the first flap 22a and the second flap 22b. The switching bar 30 is connected with the first stopper 23a and the second stopper 23b so as to allow the switching of the state that the first stopper 23a locks the upper part of the first flap 22a against the forward moving direction and the state that the second stopper 23b locks the upper part of the second flap 22b against the forward moving direction or vice versa. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a scraping device that scrapes deposits deposited on the bottom of a tank and scrapes floating objects floating on the water surface of the tank.

  Conventionally, for example, as a scraping device for deposits that efficiently scrape deposits deposited on the bottom of a tank such as a sedimentation site, a scraping table having a swinging scraping blade is reciprocated in the tank. An apparatus is known (see, for example, Patent Document 1).

This scraping device is the first state in which the scraping blades are suspended when the scraping base moves forward, and scrapes the sediment at the bottom of the tank in the forward direction to the pit at the end of the forward direction. In order to prevent the deposit on the bottom of the tank from being returned by the scraping blade when the feeding and returning platform are moved back, the scraping blade is swung from the first state and separated from the bottom of the tank.
JP2003-181209

  Here, in a sedimentation place or the like, since floating objects such as scum rise in water in the tank, it is required to equip the above-mentioned scraping device with a function of scraping floating objects.

  The present invention has been made to solve such problems, and is capable of scraping sediments and floating objects without requiring a new power source while reducing costs. An object is to provide an apparatus.

  The scraping device according to the present invention includes a lower scraping base that reciprocates at the bottom of the tank, a drive unit that reciprocates the lower scraping base, and a plurality of tanks supported in the lower scraping base and provided in the reciprocating direction. Scraping blades for scraping the bottom sediment, an upper scraping base that can be reciprocated in the upper part of the lower stirring base, and a water surface of the tank supported by the upper stirring base in a swingable manner. A flying object scraping blade that rakes the floating object floating in the backward direction, and a plurality of posts spaced apart in the reciprocating direction of the lower cradle to allow contact with the upper cradle. The drive means reciprocates the lower stroking base at intervals longer than the installation interval of each post, and the upper stroking base receives a pressing force in the backward movement direction of the post during the backward movement and the forward movement direction of the post. The pressure of the post is released. Wherein the escape forward direction of pushing force.

  In the scraping device according to the present invention, when each post reciprocates to return the upper scraping base, each post sequentially pushes the upper scraping base in the backward movement direction, and the upper scraping base moves forward. Each post pushes the upper scraper in the forward direction sequentially. For this reason, the bottom scrape table is scraped away in the forward direction by the reciprocating motion of the lower stroking table, and the upper stroking table is driven separately from the driving force of the driving unit that reciprocates the lower stroking table. Since it is possible to scrape floating objects floating on the water surface in the backward movement direction without requiring force, it is possible to scrape deposits and floating substances while reducing costs.

  Here, the upper scraping base is provided on a first flap that is suspended on the backward direction side and is swingable in the reciprocating direction, and is suspended on the forward direction side and is swingable in the reciprocating direction. During the backward movement, the second flap is allowed to swing in the forward movement direction while allowing the first flap to swing in the backward movement direction, and during the forward movement, the second flap is rocked in the backward movement direction. It is preferable to include a rocking prevention unit that prevents the rocking in the forward movement direction while allowing the movement. According to this scraping device, when the upper scraping table is moved backward, each post sequentially pushes the first flap to move the upper scraping table back to the post provided on the most backward direction side. When the upper scraper base is moved forward, each post sequentially pushes the second flap, so that the upper scraper base can be moved forward to the post provided on the most forward direction side. As described above, the reciprocating motion of the upper cradle can be achieved with a simple configuration, so that it is possible to scrape floating objects while reducing costs.

  In addition, the upper scraping base is in the first swing position where the floating scraping blade is suspended downward to rake down the floating object during backward movement, and the floating scraping blade is moved backward during forward movement. It is preferable to include a swing position switching unit that swings upward in the direction and serves as a second swing position that does not scrape floating objects. According to the scraping device, the levitated object is not raked at the time of forward movement, and therefore the levitated object can be raked toward the backward movement direction by reciprocating the drive unit.

  As described above, according to the present invention, it is possible to provide a scraping device that can scrape deposits and floating objects without requiring a new power source while reducing costs.

  Hereinafter, preferred embodiments of a precipitation apparatus according to the present invention will be described with reference to the drawings. FIG. 1 is a schematic top view showing a scratching device 1 according to an embodiment of the present invention, FIG. 2 is a schematic side view showing the scraping device, and FIG. 3 is an upper scratch located at the forward direction end of the tank. FIG. 4 is a top view showing the upper cradle in FIG. 3, FIG. 5 is a side view showing the upper cradle located at the end in the backward movement direction of the tank, and FIG. It is a side view which shows the upper scraping stand of FIG.

  As shown in FIG.1 and FIG.2, the scraping apparatus 1 of this embodiment is arrange | positioned, for example in the sedimentation basin etc. of a sewage treatment plant, and deposits, such as sludge deposited on the bottom face 2a of the tank (sedimentation basin) 2. Is lifted toward the sludge pit 2b, and the floating material such as scum that floats on the water surface 3 of the tank 2 is scraped toward the scum pipe 4 (discharging position of the floating material).

  The scraping device 1 is supported by a lower scraper 5 that reciprocates in the tank 2 and a lower side of the lower scraper 5 so as to be swingable, and scrapes deposits deposited on the bottom surface 2 a of the tank 2. A plurality of flights (scraping blades for deposits) 6, a driving unit (driving means) 7 for reciprocating the lower stirring platform 5 substantially parallel to the bottom surface 2 a of the tank 2, An upper scraping base 8 provided so as to be able to reciprocate on the upper side, and a scum plate (squirting blade for levitating substance) that slidably floats on the water surface 3 supported by the upper stirring base 8 so as to be swingable. 9. In the present embodiment, the direction in which the lower cradle 5 and the upper cradle 8 are reciprocated is defined as the reciprocating direction, and the direction orthogonal to the reciprocating direction is defined as the width direction.

  The tank 2 has a rectangular cross section, sewage is supplied from the left side of FIGS. 1 and 2, a sludge pit 2 b is provided at the bottom of the sewage supply side of the tank 2, and the downstream water surface 3 has A scum pipe 4 that can rotate around its axis is placed horizontally across the entire width of the tank 2, and a pair of side walls 2 c in the longitudinal direction of the tank 2 are parallel to the water surface 3 on which the upper cradle 8 is placed. A guide rail 10 is provided. The upper surface of the scum pipe 4 is provided with an opening 4a extending in the longitudinal direction on the peripheral surface.

  Although not shown in detail, the lower cradle 5 is similar to that described in Patent Document 1 (Japanese Patent Laid-Open No. 2003-181209), and reciprocates in the flow direction of the tank 2 by driving of the driving unit 7. The flights 6 provided on the lower cradle 5 are provided at regular intervals along the reciprocating direction of the lower cradle 5 and are fixed in a state of hanging downward during the forward movement, and the flight 6 during the backward movement. It is structured to be lifted upward in the moving direction. Therefore, when the drive unit 7 reciprocates at an interval equal to or greater than the interval between the flights 6, each flight 6 sequentially feeds the deposits and scrapes them to the sludge pit 2 b for discharge. The drive unit 7 also uses a known drive unit such as Patent Document 1.

  In addition, a plurality of traction posts 11 extending upward toward the water surface 3 are erected on both ends in the width direction at positions corresponding to the flights 6 on the upper part of the lower scraper 5. Three traction posts 11 are provided in the reciprocating direction, and are referred to as a first traction post 11a, a second traction post 11b, and a third traction post 11c in this order from the forward direction.

  As shown in FIGS. 3 to 6, the upper scraper base 8 is a rectangular shape that is disposed perpendicular to the pair of parallel drive direction members 12 extending in the reciprocating direction and the two drive direction members 12. A pair of parallel members 13 forming a frame, a pair of support bases 14a projecting in the backward direction at both ends in the width direction of the parallel members 13 in the backward direction, and both ends in the width direction of the parallel member 13 in the forward direction And a pair of support bases 14b protruding in the forward movement direction.

  The pair of driving direction members 12 are provided with rollers 15 extending toward the side walls 2 c, and the rollers 15 roll on the guide rails 10, so that the upper scraping base 8 moves the tank 2 backward. It reciprocates from the first reciprocating position 8a located at the side end (right side in FIG. 1) to the second reciprocating position 8b located at the forward end (left side in FIG. 1) of the tank 2. In addition, the pair of driving direction members 12 is provided with a rotating shaft 16 that is arranged in parallel with the parallel member 13 so as to span the pair of driving direction members 12 and is rotatable. A pair of arms 17 extending in the vertical direction are provided at both ends of the rotating shaft 16, and a plate that rakes up floating objects floating on the water surface 3 at the lower end of the pair of arms 17 in the backward movement direction. A scum plate 9 is provided. Then, the arm 17 is moved from the first swing position (see FIG. 3) where the scum plate 9 is suspended downward to the bottom of the water surface 3 to the second swing where the scum plate 9 is lifted above the water surface 3 in the backward movement direction. Swing to the position (see FIG. 5).

  In the scraping device 1, as shown in FIGS. 1 to 6, a locking arm 18 provided on the arm 17, and the arm 17 is maintained in the second swing position by contacting the locking arm 18. A pivotable cam plate 21, a swing guide 29 provided in the tank 2 to swing the arm 17, a hold pin 27 provided in the tank 2 to reset the cam plate 21, and a reset Pin 28.

  The locking arm 18 is a boomerang-shaped plate that is provided so as to extend in the forward movement direction from the rotation shaft 16 of the arm 17 and has a substantially central portion bent obliquely upward. The locking arm 18 is provided with a locking portion 19 that contacts the cam plate 21 on the top surface of the distal end portion of the locking arm 18. As shown in FIG. 5, when the arm 17 is in the second swing position, the locking portion 19 is positioned below the pair of driving direction members 12 and the locking portion 19 is located. Is provided so that the upper surface thereof is parallel to the pair of driving direction members 12.

  As shown in FIGS. 1, 2 and 5, the swing guide 29 has an inclined surface 29a facing downward in the forward movement direction, and a horizontal surface 29b extending in parallel with the water surface from the lower end of the inclined surface 29a toward the backward movement direction. And is configured. Then, when the upper stirring base 8 moves backward, the swing guide 29 abuts the upper end of the arm 17 near the inclined surface 29a in the vicinity of the first reciprocating position 8a, and the upper stirring base 8 moves in the first reciprocating motion. When moved to the position 8a, the arm 17 is provided at a position where the upper end of the arm 17 is in contact with the horizontal plane 29b.

  The cam plate 21 is a boomerang-shaped plate having a substantially center bent. As shown in FIGS. 3 and 5, the bent portion of the cam plate 21 is rotatably supported by a rotating shaft 20 that extends downward from the lower surface of the pair of driving direction members 12. Further, as shown in FIG. 4, the cam plate 21 has an outer other end portion 21b on the side wall 2c side when the inner one end portion 21a faces the forward movement direction side (the left side in the drawing) with respect to the rotary shaft 20. It is bent so as to face (or the backward movement direction side of the rotating shaft 20). Here, such a rotation position of the cam plate 21 in FIG. 4 is referred to as a reset position of the cam plate 21. As shown in FIG. 6, the cam plate 21 has an outer other end portion when the inner end portion 21 a faces the opposite side of the side wall 2 c (or the backward movement direction side of the rotating shaft 20). 21b is bent so as to face the forward direction side of the rotating shaft 20. Here, such a rotation position of the cam plate 21 in FIG. 6 is referred to as a hold position of the cam plate 21.

  As shown in FIG. 6, the hold pin 27 is a rod-shaped pin that contacts the other end 21 b of the cam plate 21 and rotates the cam plate 21. The hold pin 27 is provided in the vicinity of the tip in the backward movement direction, and the first pin is delayed at the timing when the upper end of the arm 17 comes into contact with the swing guide 29 when the upper scraping base 8 moves backward. Near the reciprocating position 8a, it comes into contact with the return side of the other end 21b of the cam plate 21, and is provided at a position to rotate the cam plate 21 to the hold position when the upper stroking base 8 moves to the first reciprocating position 8a. It has been.

  As shown in FIG. 4, the reset pin 28 is a rod-like pin that contacts the other end 21 b of the cam plate 21 and rotates the cam plate 21. This reset pin 28 is provided in the vicinity of the forward end of the forward movement direction, and is located on the forward side of the other end 21b of the cam plate 21 in the vicinity of the second reciprocation position 8b when the upper scraping base 8 moves forward. The cam plate 21 is provided at a position where the cam plate 21 is rotated to the reset position when the upper scraper 8 is brought into contact and moved to the second reciprocating position 8b.

  Moreover, in the scraping apparatus 1, as shown in FIGS. 1-6, the 1st flap 22a provided in the two support bases 14a so that rocking is each possible, and the rocking | fluctuation of this 1st flap 22a are restrict | limited. A first stopper 23a, a second flap 22b swingably provided on each of the two support bases 14b, a second stopper 23b for restricting the swing of the second flap 22b, and a reciprocating direction. A switching bar 30 extending and connected to the first flap 22a and the second flap 22b, a switching wall 31a provided at the end of the tank 2 in the backward movement direction, and a switching provided at the end of the tank 2 in the forward movement direction And a wall 31b.

  As shown in FIGS. 3 and 5, the first flap 22a extends in the vertical direction of the upper scraper base 8 and is supported by a rotating shaft 32a provided on the support base 14a so as to be swingable in the reciprocating direction. ing. The lower end of the first flap 22a extends to a position in contact with the traction post 11 that reciprocates.

  The first stopper 23a supports the upper end of the first flap 22a from the forward movement direction so that the lower end of the first flap 22a does not swing in the backward movement direction from a position where the lower end of the first flap 22a faces downward. As shown in FIGS. 4 and 6, the first stopper 23a is swingably supported by a rotating shaft 24a extending from the auxiliary plate 33a mounted and fixed on the upper portion of the support base 14a toward the side wall 2c. Yes. The first stopper 23a is formed with a hook portion 25a that extends from the rotation shaft 24a in the forward movement direction and locks the upper end of the first flap 22a from the forward movement direction, and a hole 26a that is long in the vertical direction. Thus, a switching bar connecting portion 36a extending downward from the rotating shaft 24a is formed.

  As shown in FIGS. 3 and 5, the second flap 22b extends in the vertical direction of the upper scraper base 8, and is supported by a rotating shaft 32b provided on the support base 14b so as to be swingable in the reciprocating direction. ing. The lower end of the second flap 22b extends to a position where it contacts the traction post 11 that reciprocates.

  The second stopper 23b supports the upper end of the first flap 22a from the backward movement direction so that the lower end of the second flap 22b does not swing in the forward movement direction from the position facing downward. As shown in FIGS. 4 and 6, the second stopper 23b is swingably supported by a rotation shaft 24b extending from the auxiliary plate 33b mounted and fixed on the upper portion of the support base 14b toward the side wall 2c. Yes. The second stopper 23b is formed with a hook portion 25b extending in the reciprocating direction from the rotating shaft 24b and locking the upper end portion of the second flap 22b from the backward direction, and a hole 26b that is long in the vertical direction. Thus, a switching bar connecting portion 36b extending downward from the rotating shaft 24b is formed.

  As shown in FIGS. 3 to 6, the switching bar 30 is formed in a rod shape extending in the reciprocating direction, and is provided by a switching bar holding portion 34 that is placed and fixed at both ends in the width direction of the pair of parallel members 13. Slidably held in the reciprocating direction.

  The switching bar 30 is provided with convex portions 35a and 35b inserted into the holes 26a and 26b at positions corresponding to the holes 26a of the first stopper 23a and the holes 26b of the second stopper 23b. Yes. When the hook portion 25a of the first stopper 23a engages the first flap 22a, the switching bar 30 releases the engagement of the first flap 22b by the hook portion 25b of the second stopper 23b ( 3), when the hook portion 25b of the second stopper 23b locks the first flap 22b, the hook portion 25a of the first stopper 23a releases the locking of the first flap 22a (see FIG. 5). ), The first stopper 23a and the second stopper 23b are connected to each other. Here, the positions of the switching bar 30, the first stopper 23a, and the second stopper 23b shown in FIG. 3 are called first stopper positions, and the switching bar 30, the first stopper 23a, and the like shown in FIG. The position of the second stopper 23b is referred to as a second stopper position. Then, when the switching bar 30 moves in the forward movement direction, the first stopper 23a and the second stopper 23b swing in the movement direction in synchronization, and between the first stopper position and the second stopper position. Switch with.

  The switching wall 31a is near the distal end of the tank 2 in the backward movement direction, and is a wall against which the switching bar 30 of the upper scraping base 8 that moves backward comes into contact as shown in FIGS. When the upper cradle 8 is positioned at the first reciprocating position 8a, the switching bar 30 contacts and is pushed in the forward movement direction, and the first stopper 23a and the second stopper 23b are moved to the first stopper position. It is provided at the position. On the other hand, the switching wall 31b is a wall with which the switching bar 30 of the upper stroking base 8 that moves forward comes into contact, and as shown in FIGS. 1, 3, and 4, near the forward end of the tank 2 in the forward direction. When the upper scraper base 8 is positioned at the second reciprocating position 8b, the switching bar 30 comes into contact and is pushed in the backward movement direction so that the first stopper 23a and the second stopper 23b are in the second position. It is provided at a position to be the stopper position.

  Next, the operation of the scraping device 1 will be described with reference to the drawings.

  The drive unit 7 drives the lower cradle 5 in the reciprocating direction at a distance longer than the installation interval of the flights 6. For example, when the installation interval of each flight 6 is 4000 mm, the driving unit 7 drives the lower scraper base 5 in the reciprocating direction at a distance of 4700 mm. The lower scraper 5 moves in the reciprocating direction, and the flight 6 scrapes the deposits accumulated on the bottom of the tank 2 to the sludge pit 2b.

  Then, the upper carriage base 8 is located at the second reciprocating position 8b, the arm 17 is at the first swing position, the cam plate 21 is at the reset position, and the first stopper 23a and the second stopper 23b are at the first position. When the lower scraper base 5 moves in the backward movement direction in the state where it is in the stopper position, the traction post 11 similarly moves in the backward movement direction, and as shown in FIG. 7, the first traction post 11a is the first traction post 11a. It contacts the lower part of the flap 22a. Since the upper end of the first flap 22a is restricted in the forward movement direction by the stopper 23a, the first pulling post 11a pushes the first flap 22a and moves the upper scraper base 8 to the first The traction post 11a is moved backward to the return limit position (see 8c in FIG. 8).

  Thereafter, the first traction post 11a switches to the movement in the forward movement direction, but the lower end portion of the second flap 22b can swing in the forward movement direction. The second flap 22b is swung and moved in the forward direction without moving 8 in the forward direction. Then, the second traction post 11b moves from the backward movement direction side of the upper carriage base 8, but the lower end portion of the first flap 22a can swing in the forward movement direction. The post 11b moves between the first flap 22a and the second flap 22b by swinging the flap 22b without moving the upper stroking base 8 in the forward movement direction.

  Thereafter, the second traction post 11b is switched to the movement in the backward movement direction, and the second traction post 11b pushes the first flap 22a of the upper cradle 8 in the backward movement direction, so that the upper cradle 8 Moves in the backward direction.

  Thus, as shown in FIG. 8, the upper cradle 8 is sequentially moved in the backward movement direction by the first traction post 11a to the third traction post 11c, and the first reciprocating position 8a to 8c, After 8d, it moves to the second reciprocating position 8b.

  When the upper scraping base 8 approaches the second reciprocating position 8b, the upper end of the arm 17 comes into contact with the inclined surface 29a of the swing guide 29 as shown in FIG. When the upper scraper 8 further moves in the backward movement direction, as shown in FIG. 9B, the arm 17 and the locking arm 18 start to swing around the rotation shaft 16, and the swing angle gradually increases. At the same time, the other end portion 21 b of the cam plate 21 starts to rotate while coming into contact with the hold pin 27.

  When the upper scraper 8 moves to the second reciprocating position 8b, the upper end of the arm 17 reaches the horizontal plane 29b of the swing guide 29 as shown in FIGS. Thus, the arm 17 is in the second swing position, and the locking portion 19 provided on the upper surface of the locking arm 18 is horizontal. Further, the cam plate 21 is rotated by the hold pin 27 to be switched to the hold position, the one end portion 21a of the cam plate 21 abuts on the upper surface of the locking portion 19, and the arm 17 causes the second swing of the cam plate 21. Held in position. Further, the switching bar 30 abuts on the switching wall 31a and is pushed in the forward movement direction, so that the first stopper 23a and the second stopper 23b are switched to the second stopper position.

  Thereafter, when the third pulling post 11c moves in the forward movement direction, the third pulling post 11c is kept in the state where the arm 17 is held at the second swing position by the cam plate 21, as shown in FIG. It contacts the lower part of the second flap 22b. Since the upper end of the second flap 22b is switched by the stopper 23b so that the swinging in the backward movement direction is restricted, the third pulling post 11c moves the second flap 22b of the upper scraper base 8 over the second flap 22b. Push to move to the forward limit position of the third pulling post 11c (see 8e in FIG. 8).

  The third traction post 11c is switched to the movement in the backward movement direction, but the lower end portion of the first flap 22a is switched so as to be swingable in the backward movement direction. Without moving the scraping base 8 in the backward movement direction, the second flap 22a is swung to move in the backward movement direction. Then, the second traction post 11b moves from the forward movement direction side of the upper carriage base 8, but the lower end portion of the second flap 22b can swing in the backward movement direction. The post 11b moves between the first flap 22a and the second flap 22b by swinging the flap 22b without moving the upper scraping base 8 in the backward movement direction.

  Thereafter, the second traction post 11b is switched to the forward movement, and the second traction post 11b pushes the second flap 22b of the upper cradle 8 in the forward direction, whereby the upper cradle 8 Moves in the forward direction.

  Thus, as shown in FIG. 8, the upper cradle 8 is sequentially moved in the forward movement direction by the third traction post 11c to the first traction post 11a, and the second reciprocating position 8b to 8e, After 8f, it moves to the first reciprocating position 8a.

  When the upper scraping base 8 approaches the first reciprocating position 8a, the other end 21b of the cam plate 21 comes into contact with the reset pin 28 and starts to rotate.

  When the upper scraping base 8 moves to the first reciprocating position 8a, the cam plate 21 is rotated by the reset pin 28 and switched to the reset position as shown in FIGS. The holding of the arm 17 is released, and the arm 17 is switched to the first swing position. Further, the switching bar 30 abuts against the switching wall 31b and is pushed in the backward movement direction, and the first stopper 23a and the second stopper 23b are switched to the first stopper position and returned to the original state.

  Thus, in the scraping device 1, when the upper scraper base 8 is moved backward by the reciprocating movement of the respective pull posts 11 a to 11 c, the respective pull posts 11 a to 11 c sequentially return the upper scraper base 8. When the upper scraper base is moved forward by pushing in the moving direction to move to the first reciprocating position 8a, the traction posts 11c to 11a sequentially push the upper stroking base 8 in the forward direction to move to the second reciprocating position 8b. To move. For this reason, by reciprocating the lower cradle 5, the lower cradle 5 scrapes the sediment on the bottom of the tank 2 in the forward movement direction, and the upper cradle 8 is separated from the drive unit 7. It is possible to scrape floating objects floating on the water surface in the backward direction without requiring another driving force, so it is possible to scrape sediments and floating objects while reducing costs. .

  In the scraping device 1, the upper scraping base 8 is provided with a first flap 22a and a second flap 22b that come into contact with the traction posts 11a to 11c, and the first flap 22a and the second flap. By providing the first stopper 23a and the second stopper 23b for restricting the swinging of 22b, and the switching bar 30 connected to the first stopper 23a and the second stopper 23b, the upper cradle 8 can be When returning, the upper stroking base 8 can be moved back to the first reciprocating position 8a by sequentially pushing the first flap 22a by the respective pulling posts 11a to 11c. When moving forward, each of the pulling posts 11c to 11a sequentially pushes the second flap 22b, whereby the upper scraper base 8 can be moved forward to the second reciprocating position 8b. Thus, since the reciprocating motion of the upper scraping base 8 can be achieved with a simple configuration, it is possible to scrape floating objects while reducing costs.

  Further, in this scraping device 1, when the upper scraping base 8 is moved forward, the arm 17 is swung to lift the scum plate 9 above the water surface 3, so that the drive unit 7 is reciprocated, It is possible to scrape the levitated object toward the backward movement direction without ramming the levitated object in the forward movement direction.

  As described above, the present invention has been specifically described based on the embodiment. However, the present invention is not limited to the above embodiment. For example, in the above embodiment, the deposit is raked in the forward direction and floated. Although it has been explained that the object is scraped in the backward movement direction, the deposit may be scraped in the forward movement direction, and the floating object may be scraped in the backward movement direction. You may rake up.

  In the above embodiment, three traction posts 11 are provided in the reciprocating direction. However, the number of traction posts 11 is not particularly limited, and the length of the tank 2 and the control of the drive unit 7 are controlled. The number may be changed as appropriate according to the amount or the like.

It is a schematic top view which shows the scraping apparatus which concerns on embodiment of this invention. It is a schematic side view which shows a scraping apparatus. It is a side view which shows the upper scratching stand located in the forward direction end part of a tank. It is a top view which shows the upper scraping stand of FIG. It is a side view which shows the upper scratching stand located in the backward movement direction edge part of a tank. It is a side view which shows the upper scraping stand of FIG. It is a figure which shows the return movement of an upper scraping stand. It is a figure which shows the relationship between an upper scraping stand and a traction post. It is a figure which shows the relationship between an arm, a latching arm, a cam plate, and a rocking | fluctuation guide. It is a figure which shows the movement of an upper scraping stand.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Scraping device, 2 ... Tank, 5 ... Lower scraping stand, 6 ... Flight (scraping blade for deposits), 7 ... Driving means, 8 ... Upper scraping stand, 9 ... Scum plate (Scratch for floating material) 11) traction post, 17 ... arm (swing position switching part), 18 ... locking arm (swing position switching part), 20 ... cam plate (swing position switching part), 22a ... first Flap, 22b ... second flap, 23a ... first stopper (swing prevention part), 23b ... second stopper (swing prevention part), 30 ... switching bar (swing prevention part).

Claims (3)

A lower cradle that reciprocates at the bottom of the tank;
Drive means for reciprocating the lower scraper;
A plurality of scraping blades for deposits that are supported by the lower scraping base and are provided in the reciprocating direction and scrape the deposits at the bottom of the tank;
An upper cradle that is reciprocally movable at the upper part of the lower cradle, and
A floating blade for floating object that is supported by the upper stirring table so as to be swingable and rakes the floating object floating on the water surface of the tank in the backward movement direction;
A plurality of standing posts spaced apart in the reciprocating direction in the lower cradle and capable of contacting the upper cradle, and
The drive means reciprocates the lower scraper at an interval longer than the installation interval of each post,
The upper scraping table receives a pushing force in the backward movement direction of the post during the backward movement and releases a pushing force in the forward movement direction of the post, and receives a pushing force in the forward movement direction of the post during the backward movement. And a scraping device for releasing the pushing force in the forward direction of the post.   The upper scraper is suspended on the backward direction side and provided with a first flap that can swing in the reciprocating direction, and a second flap is provided on the forward direction side so as to be swingable in the reciprocating direction. During the backward movement, the flap is allowed to swing in the backward movement direction while allowing the first flap to swing in the forward movement direction, and during the forward movement, the backward movement of the second flap is prevented. The scraping device according to claim 1, further comprising: a rocking prevention unit that allows rocking in the forward movement direction while allowing.   The upper scraping base is set to a first swinging position where the floating scraping blade is suspended downward to rake down the floating object during backward movement, and the floating scraper blade is moved backward during forward movement. The scraping device according to claim 1, further comprising a swing position switching unit that swings upward in a direction and sets the second swing position so as not to scrape the floating object.

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