JP4374329B2 - Dust remover - Google Patents

Description

  The present invention relates to a dust remover configured to discharge dust in a water channel.

  In general, it is provided with a screen arranged to cross the water channel and an arm rotatably supported around a rotation axis arranged across both sides of the water channel, and by rotating the arm around the rotation axis, There is known a dust remover (for example, Patent Document 1) that drives a pair of rakes provided at both ends of the arm to sequentially trace the screen, and scrapes the dust trapped on the screen to the outside of the water channel. .

In the dust remover of Patent Document 1, the side surface of the screen is formed in an arc shape, the rotation shaft is provided corresponding to the center position of the arc, and the longitudinal center position of the arm is set to the rotation shaft. By fixing, both rakes are rotated along a circular path including the arc shape of the screen.
Japanese Utility Model Publication No. 52-105523

  However, the dust remover of Patent Document 1 unnecessarily occupies an area on the water channel because both rakes move along a circular track.

  That is, in the dust remover of Patent Document 1, while one rake is discharging the dust captured by the screen, the other rake that is not involved in discharging the dust is also on the water surface by the same rotational radius dimension. The dust remover itself is bulky above the water channel.

  This invention is made | formed in view of the said subject, and aims at providing a compact dust remover.

  In order to solve the above-mentioned problems, the present invention comprises a screen provided so as to cross a water channel, a rotary shaft arranged across both banks of the water channel, and an arm supported across the rotary shaft. A pair of rakes provided at both ends of the arm in accordance with the rotational drive of the rotating shaft, and sequentially moving the rake along the side surface shape of the screen from the bottom to the top so that the dust trapped on the screen A dust remover that scrapes up and removes the arm according to the rotational drive of the rotary shaft, and supporting means for supporting the arm so as to be relatively displaceable with respect to the rotary shaft along the intersecting direction. Transition means capable of transitioning the support mode of the arm by the support means so that the radii of rotation from the rake to the rotating shaft are different from each other, and the transition means includes at least one rake. A dust remover characterized by relatively shortening the rotation radius of the other rake by increasing the rotation radius of the rake within the rotation range of the rotating shaft that moves along the side surface shape of the lean. I will provide a.

  According to the present invention, the transition means relatively increases the rotation radius of the other rake moving on the water channel by increasing the rotation radius of one rake while moving along the side surface shape of the screen. Since it can shorten, it can suppress that the rake which moves on a waterway passes a position higher than necessary.

  Therefore, according to this invention, a compact dust remover can be provided by reducing the area | region which an arm occupies above a water channel.

  The transition of the turning radius by the transition means is not limited to the rotation range of the rotating shaft in which one rake moves along the side surface shape of the screen. For example, the rake moving in the water channel By increasing the rotation radius of the rake in the rotation range of the rotary shaft that is not involved in the removal of dust, the rotation radius of the other rake that moves on the water channel can be made relatively short. .

  The “rotation radius” indicates the distance from the rotation axis to the rake, and is not intended to limit the locus of movement of the rake according to the rotational movement of the rotation axis to an arc shape. In other words, the rake can be moved along a screen having a straight side surface depending on the transition of the support mode of the arm with respect to the rotation axis by the transition means.

  According to a second aspect of the present invention, in the dust remover, the screen is formed in a side surface arc shape that curves upward as it goes downstream of the water channel, and the rotation shaft is located at a center position of the arc shape. And the arm is set to a longitudinal dimension that is less than the diameter dimension of the arc shape, and the transition means moves the rake in a path along the arc shape of the screen. The support mode of the arm with respect to the support means is changed.

  According to this configuration, since the longitudinal dimension of the arm is set to be smaller than the diameter dimension of the screen, the rotational radius of one rake is set by the transition means in accordance with the distance to the screen. In comparison with the above, the radius of rotation of the rake on the opposite side is inevitably shortened, so that the rake moving on the water channel can be prevented from moving at a position higher than necessary.

  According to a third aspect of the present invention, in the dust remover, the transition means includes a frame provided on the shore of the water channel, a guide groove formed on the frame and opening to the other shore side, and to the side of the arm. A guide protrusion that protrudes and is loosely fitted in the guide groove, and the guide protrusion moves along the guide groove in accordance with the rotational drive of the rotation shaft, thereby changing the support mode of the arm with respect to the support means. It is characterized by making it.

  According to this structure, since the guide protrusion can move along the guide groove, the support mode of the arm can be changed, so that the path of the guide groove (the path where the guide groove is formed in a side view) is adjusted. Thus, the radius of rotation of the rake can be set to a desired dimension.

  According to a fourth aspect of the present invention, in the dust remover, a pair of the guide protrusions are provided at positions sandwiching the rotation shaft, and the guide groove corresponds to a rotation range of 180 ° of the rotation shaft. It is characterized in that it is formed in the movement range.

  According to this configuration, since the pair of guide protrusions are formed on both sides of the arm and the guide groove is formed corresponding to the rotation range of 180 ° of the rotation shaft, the entire range in which the rotation shaft rotates (360 °). For any of the above, any one of the guide protrusions can always be loosely fitted in the guide groove.

  Therefore, according to this configuration, while the guide groove (frame) is formed only in the range of half rotation of the rotation shaft, the arm is supported along the path defined by the guide groove for the entire range in which the rotation shaft rotates. Transition can be made.

  According to a fifth aspect of the present invention, in the dust remover, the screen includes a plurality of screen bars disposed at predetermined intervals between both sides of the water channel, and the rake is comb teeth that mesh with the screen bars. And a brush disposed so as to cover the comb-shaped concave portion.

  According to this configuration, when the rake moves along the shape of the side surface of the screen bar, the side surface of the screen bar can be swept with the brush. For example, when the algae in the water channel is captured by the screen bar. The algae entangled up to the side of the screen bar can be effectively removed.

  According to a sixth aspect of the present invention, in the dust remover, the screen includes a plurality of screen bars disposed at predetermined intervals between both sides of the water channel, and the rake is comb teeth engaged with the screen bars. And a scraping member that protrudes to the inside of the comb-shaped concave portion and slides on the side surface of the screen bar.

  According to this configuration, when the rake moves along the side surface shape of the screen bar, the side surface of the screen bar and the scraping member can be slid, so that, for example, algae in the water channel is captured by the screen bar. When it is, the algae entangled to the side of the screen bar can be effectively removed.

  According to a seventh aspect of the present invention, the dust remover further includes a scraper that is swingable about a swing shaft along the rotation shaft, and a stopper that defines a swing lower end position by its own weight. The scraper abuts the upper surface of the rake in the ascending process so that the opening angle toward the rotary shaft becomes an acute angle at the lower end position of the swing, and the top of the rake is moved on the rake according to the rotational drive of the arm. It swings around the swing shaft while sliding to the side, and is configured to return to the swing lower end position when the tip of the rake passes through a scraper. It is.

  According to this configuration, the dust scraped off from the screen onto the rake can be removed (extruded) to the arm tip side by using the driving force of the rotational drive of the arm. If a dust disposal location is set on the side, the dust can be removed to the dust disposal location simply by rotating the rotating shaft.

  According to an eighth aspect of the present invention, in the dust remover, the scraper is provided with a brush, and the brush is configured to slide on the rake according to the rotational drive of the arm. It is characterized by.

  According to this configuration, when the scraper slides on the rake, the upper surface of the rake can be swept with a brush. For example, when the algae in the water channel are scraped off the rake, Can be scraped off the rake.

  According to the present invention, a compact dust remover can be provided.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a plan view showing a dust remover according to an embodiment of the present invention. FIG. 2 is a side sectional view of the dust remover of FIG. FIG. 3 is a front view of the dust remover of FIG. 1 when viewed from the upstream side of the water channel.

  Referring to the drawings, the dust remover 1 includes a screen 25 provided in the water channel S, a drive unit 2 disposed across both sides S1 of the water channel S, and a water channel downstream of the drive unit 2. And an operation table 3 placed on S, so that the dust in the water channel S captured by the screen 25 in accordance with the drive of the drive unit 2 is discharged to a dust disposal location (not shown) on the operation table 3. It has become.

  The screen 25 includes a plurality of screen bars 4 formed in a substantially arc shape in a side view and a pair of upper and lower stays 5 that fix the screen bars 4 in the water channel S.

  The stays 5 are spanned between the two banks S1 of the water channel S, and the screen bars 4 that are curved upward toward the downstream side of the water channel S are arranged at a constant interval between the two banks S1 of the water channel S. It is designed to be supported in the open state.

  The drive unit 2 is provided on the rotating shaft 6 disposed across the both sides S <b> 1 of the water channel S, a pair of arms 7 supported so as to cross the rotating shaft 6, and both ends of the arms 7. A pair of rakes 8, a guide frame 9 erected on the both sides S <b> 1, and a discharge mechanism 10 provided on the guide frame 9 are provided.

  The rotating shaft 6 is rotatably supported on the water channel S by a pair of bearings 6a provided opposite to both sides S1 of the water channel S, and rotates according to the driving force of the motor 11 with a built-in micro reducer. Is possible.

  In addition, a pair of cylindrical members (supporting means) 12 penetrates and is fixed to the rotary shaft 6 inside the bearings 6a. These cylindrical members 12 are disposed orthogonal to the axis of the rotating shaft 6 and are arranged in parallel to each other so as to rotate in the same phase in accordance with the driving of the rotating shaft 6.

  The arm 7 is a rod-shaped member inserted into each cylindrical member 12. These arms 7 can move along the diameter direction of the rotating shaft 6 by sliding with respect to the respective cylindrical members.

  The rake 8 is spanned between adjacent ends of the arms 7 and has a tip shape that can be engaged with the screen bars 4.

  Specifically, as shown in FIG. 4, a plurality of recesses (comb recesses) 8a are formed at the tip of the rake 8 corresponding to the screen bars 4, and the recesses 8a are covered. Thus, the brush 14 is fixed.

  Therefore, as the rake 8 moves along the side surface shape of each screen bar 4, the side surface of each screen bar 4 can be swept by the brush 14, as shown in FIG. When the algae in the water channel S are captured by the screen bar 4, the algae entangled up to the side surface of the screen bar 4 can be effectively removed.

  As shown in FIG. 7, the rake 8 may have a scraping member 24 having a plurality of mountain-shaped blades 24a protruding inward of the recess 8a.

  The scraping member 24 is a substantially rectangular plate member formed of a material having a relatively small frictional resistance such as a fluorine resin. A plurality of chevron blades 24 a are formed at both ends in the longitudinal direction of the scraping member 24 along the width direction thereof.

  A plurality of scraping members 24 are attached to the surface of the rake 8 by bolts B so that the blades 24a are arranged along the edge of the recess 8a.

  In this manner, as shown in FIG. 7A, when the rake 8 moves along the side surface shape of the screen bar 4, the side surface of the screen bar 4 and each blade 24a are slid. Therefore, for example, when the algae in the water channel S are captured by the screen bar 4, the algae entangled up to the side surface of the screen bar 4 can be effectively removed.

  Referring again to FIGS. 1 to 3, guide rollers (guide protrusions) 15 are provided on two sides of the side surface of each arm 7 with the rotation shaft 6 interposed therebetween. The guide rollers 15 include a shaft 15a extending toward the both banks S1 along the rotation shaft 6 and a roller 15b rotatable around the shaft 15a. The roller 15b follows a path defined by the guide frame 9. Thus, each arm 7 is displaced relative to the rotating shaft 6 by rolling contact.

  That is, each guide frame 9 is a bowl-shaped member in which a substantially U-shaped guide groove 16 facing each other between the two banks S1 is formed, and the roller 15b is guided in the guide groove 16. It has become. In the present embodiment, the guide roller 15 and the guide frame 9 constitute an example of a transition unit.

  Specifically, as shown in FIG. 2, each guide frame 9 includes a first curved portion 9a that curves from the shore S1 to the upstream side of the rising water channel S, and a horizontal portion that extends in a substantially horizontal direction from the first curved portion 9a. 9b and a vertical oval side surface shape having a second curved portion 9c that curves from the horizontal portion 9b to the shore S1 side, and is formed corresponding to a rotation range of the rotary shaft 6 of 180 °. .

  The guide frame 9 is arranged such that the second curved portion 9c is concentric with each screen bar 4 in a side view, and the radius of rotation of the rake 8 that rotates offset to the second curved portion 9c. R1 is a radius of curvature smaller than the radius of curvature of the screen bar 4 (that is, the radius of rotation of the other rake 8 rotating corresponding to the second curved portion 9c) R2, and the sum of these radii (R1 + R2) is the arm. Each part is dimensioned to be equal to the longitudinal dimension D1 of 7.

  Accordingly, when the roller 15b is brought into rolling contact with the second curved portion 9c, one rake 8 rotates and moves along a circular orbit corresponding to the radius R1, and the other rake 8 corresponds to the radius R2. It moves along the side surface shape of each screen bar 4 along the circular orbit to perform.

  Then, the roller 15b rising from the screen bar 4 onto the water channel S enters the first curved portion 9a from below and moves toward the rotary shaft 6 along the first curved portion 9a (the diameter dimension is changed). Next, the movement along the horizontal portion 9b is started.

  Here, the horizontal portion 9b is set so that the height D3 of the highest reaching point of the rake 8 moving along the horizontal portion 9b is lower than the water depth D2 of the water channel S.

  And the said roller 15b will perform the rotational movement based on the 2nd curved part 9c mentioned above from the said horizontal part 9b again.

  5 is a partial schematic side view showing the discharge mechanism 10 in the dust remover 1 of FIG. 1 in an enlarged manner. FIG. 5A is a state in which the scraper 19 and the rake 8 are in contact with each other, and FIG. 8 and 8 are in a sliding state. 6 is an enlarged partial side view schematically showing the discharge mechanism 10 in the dust remover 1 of FIG. 1. FIG. 6A is a state in which the scraper 19 is further slid on the rake 8, and FIG. 6B is a state in which the rake 8 is the scraper. The state which passed 19 is shown, respectively.

  Referring to FIGS. 1, 2, 5, and 6, the discharge mechanism 10 swings with respect to the bracket 17 extending from the first curved portion 9 a toward the downstream side of the water channel S, and the bracket 17. A scraper 19 that is swingable about a shaft 18 is provided, and the scraper 19 is disposed on a rotating track of the rake 8 that rises from the water channel S.

  The brackets 17 are respectively provided on the first curved portions 9a so as to face each other between the two banks S1, and the swing shafts 18 along the rotary shaft 6 are provided on the brackets 17, respectively. The bracket 17 is provided with a stopper rubber 20.

  The scraper 19 is attached to the erection bar 22 and a pair of oscillating arms 21 that are pivotally supported by the oscillating shafts 18, an erection bar 22 spanned on the tip of the oscillating arms 21, and the erection bar 22. And a brush 23.

  The swing arm 21 is swingable about the swing shaft 18 with respect to the bracket 17, and a position in contact with the stopper rubber 20 is defined as a swing lower end position by its own weight.

  The swinging lower end position is defined such that the tip of the swinging arm 21 is inclined toward the downstream side of the water channel S as shown in FIG. Therefore, the erection bar 22 comes into contact with the upper surface of the rake 8 rising from the water channel S at the lower end position of the swing so that the angle θ1 opened toward the rotating shaft 6 becomes an acute angle.

  Each swing arm 21 has a dimension D4 (see FIG. 1) between the rakes 8 that is larger than a width dimension D5 of the rakes 8 so that the rake 8 can pass between them. Has been placed.

  The brush 23 is mounted downward from the erection bar 22 at the swinging lower end position.

  According to this discharge mechanism 10, as shown in FIG. 5A, when the erection bar 22 (brush 23) comes into contact with the rake 8 rising from the water channel S, the rake 8 further rotates from this state. As shown in FIG. 5B, the erection bar 22 (brush 23) swings around the swing shaft 18 while sliding on the rake 8 toward the tip end side.

  When the rotational movement of the rake 8 proceeds, as shown in FIG. 6 (a), the erection bar 22 swings further upward, and finally, as shown in FIG. 6 (b), the rake 8 is erected. It passes inside the bar 22 (oscillating shaft 18 side).

  As a result, the erection bar 22 swings downward due to its own weight. When the swinging is restricted by the stopper rubber 20, as shown in FIG. Return to position.

  Therefore, according to the discharge mechanism 10, dust scraped off from the screen bar 4 onto the rake 8 can be removed to the distal end side of the arm 7 using the driving force of the rotational drive of the arm 7. The dust can be discharged only by rotating the rotary shaft 6 with respect to the dust processing portion (not shown) set on the tip end side (on the operation table 3) of the arm 7.

  Since the scraper 19 is provided with a brush 23, for example, when the algae in the water channel S are scraped onto the rake 8 by sweeping the upper surface of the rake 8 with the brush 23, the algae Can be scraped off from the rake 8.

  As described above, according to the dust remover 1, the radius of rotation about one rake 8 while moving along the side shape of the screen 25 by the guide frame 9 (second curved portion 9 c) and the guide roller 15. Since the rotation radius of the other rake 8 that moves on the water channel S can be relatively shortened by increasing the length of the rake 8, the rake 8 that moves on the water channel S passes through a position higher than necessary. Can be suppressed.

  Therefore, the compact dust remover 1 can be provided by reducing the area occupied by the arm 7 above the water channel S.

  The transition of the turning radius is not limited to the rotation range of the rotating shaft 6 in which one of the rakes 8 moves along the side surface shape of the screen 25, but also the rake that moves in the water channel S by the horizontal portion 9b of the guide frame 9. 8 is also executed in the rotation range of the rotary shaft 6 that is not involved in the removal of dust from the screen 25, so that the other rake 8 that moves on the water channel S in the same manner as described above also in this rotation range. The rotation radius can be made relatively short.

  Moreover, although the said embodiment demonstrated each screen bar 4 formed in the side surface substantially circular arc shape, the shape of the screen bar 4 is not limited to this. That is, the rake 8 can be moved linearly by appropriately setting the side surface shape of the guide groove 16 of the guide frame 9. In this case, the screen bar 4 is directed to the downstream side of the water channel S. It can be made into the form of the side linear form which inclines upwards.

  In the dust remover 1 according to the embodiment, the longitudinal dimension D1 of the arm 7 is the total dimension of the rotation radius R1 and the rotation radius R2 (both refer to FIG. 2) of the rake 8, that is, the length dimension of the arm 7. D1 is set to be smaller than the arc-shaped diameter dimension (R2 × 2 dimension) of the screen bar 4.

  According to this configuration, since the longitudinal dimension D1 of the arm 7 is set to be less than the diameter dimension of the screen bar 4, the turning radius of one rake 8 is changed to R2 along the screen bar 4 to be opposite. The rotation radius R1 of the rake 8 on the side is inevitably shorter than the rotation radius R2, so that the rake 8 moving on the water channel S can be prevented from moving at a position higher than necessary.

  Furthermore, according to the dust remover 1 according to the above-described embodiment, the guide roller 15 moves along the guide groove 16 so that the support mode of the arm 7 can be changed. Therefore, the path of the guide groove 16 is adjusted. As a result, the radius of rotation of the rake 8 can be set to a desired dimension.

  According to the embodiment, a pair of guide rollers 15 is provided at a position sandwiching the rotation shaft 6 of the arm 7 and a guide groove 16 is formed in a moving range of each guide roller 15 corresponding to a rotation range of the rotation shaft 6 of 180 °. According to the dust remover 1, any of the guide rollers 15 can always be loosely fitted in the guide groove 16 for the entire range (360 °) in which the rotating shaft 6 rotates.

  Therefore, while the guide frame 9 is formed only in the range of half rotation of the rotating shaft 6, the support mode of the arm 7 can be changed along the path defined by the guide groove 16 over the entire range in which the rotating shaft 6 rotates. it can.

It is a top view which shows the dust remover which concerns on embodiment of this invention. It is side surface sectional drawing of the dust remover of FIG. It is a front view when it sees from the water channel upstream of the dust remover of FIG. The rake front-end | tip part of the dust remover of FIG. 1 is expanded and shown, (a) is a top view, (b) is a side view. FIG. 2 is an enlarged schematic side view of a discharge mechanism in the dust remover of FIG. 1, wherein (a) shows a state where the scraper and the rake are in contact with each other, and (b) shows a state where the scraper and the rake are sliding. Each is shown. FIG. 2 is an enlarged schematic side view of a discharge mechanism in the dust remover of FIG. 1, where (a) shows a state in which the scraper further slides on the rake, and (b) shows a state in which the rake has passed through the scraper. . About the rake of another embodiment which concerns on the dust remover of FIG. 1, the front-end | tip part is expanded and shown, (a) is a top view, (b) is a side view.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Dust remover 4 Screen bar 6 Rotating shaft 7 Arm 8 Rake 8a Concave part 9 Guide frame 10 Discharge mechanism 12 Cylindrical member (support means)
14 Brush 15 Guide roller 16 Guide groove 18 Oscillating shaft 20 Stopper rubber 22 Installation bar 23 Brush 25 Screen D1 Longitudinal dimension R1, R2 Turning radius S Water channel S1 Shore

Claims (8)

A screen provided across the water channel, a rotary shaft disposed across both sides of the water channel, and an arm supported so as to cross the rotary shaft, according to the rotational drive of the rotary shaft A dust remover that scrapes and removes dust trapped on the screen by sequentially moving a pair of rakes provided at both ends of the arm from bottom to top along the side shape of the screen. ,
Support means for supporting the arm so as to be relatively displaceable with respect to the rotation axis along the intersecting direction;
Transition means capable of transitioning the support mode of the arm by the support means so that the rotation radii from the rakes to the rotation shafts are different from each other according to the rotational drive of the rotation shaft,
The transition means is configured to increase the rotation radius of the rake relative to the rotation radius of the rotation axis in which at least one of the rakes moves along the side surface shape of the screen, thereby relatively rotating the rotation radius of the other rake. Dust remover characterized by shortening.   The screen is formed in a side arc shape that curves upward as it goes downstream of the water channel, and the rotation shaft is disposed at a center position of the arc shape, and the arm has the arc shape. The transition means is configured to transition the support mode of the arm with respect to the support means so as to move the rake in a trajectory along the arc shape of the screen. The dust remover according to claim 1.   The transition means includes a frame provided on the shore of the water channel, a guide groove formed on the frame and opening to the other shore side, and a guide protrusion protruding to the side of the arm and loosely fitted in the guide groove. 3. The support mode of the arm with respect to the support means is changed by moving the guide projection along the guide groove according to the rotational drive of the rotary shaft. Dust remover. A pair of the guide protrusions are provided at positions sandwiching the rotation shaft, and the guide grooves are formed in a movement range of each guide protrusion corresponding to a rotation range of 180 ° of the rotation shaft. The dust remover according to claim 3 .   The screen includes a plurality of screen bars disposed at predetermined intervals between both banks of the water channel, and the rake is formed in a comb-tooth shape that meshes with the screen bars, and the comb-tooth recesses are formed. The dust remover according to any one of claims 1 to 4, further comprising a brush arranged to cover the brush. The screen includes a plurality of screen bars disposed at predetermined intervals between both banks of the water channel, and the rake is formed in a comb-teeth shape that meshes with the screen bars, and the comb-teeth concave portion is formed. The dust remover according to any one of claims 1 to 4 , further comprising a scraping member that protrudes inward and slides on a side surface of the screen bar.   And a scraper that is swingable about a swing axis along the rotation axis, and a stopper that defines a swing lower end position by its own weight, and the scraper moves upward at the swing lower end position. The rake is in contact with the upper surface of the rake so that the opening angle toward the rotating shaft is an acute angle, and the rake is moved around the swinging shaft while sliding on the rake on the rake according to the rotational drive of the arm. The dust removing device according to any one of claims 1 to 6, wherein the dust removing device is configured to swing and return to the swinging lower end position when the tip of the rake passes through a scraper. Machine.   The dust remover according to claim 7, wherein the scraper is provided with a brush, and the brush slides on the rake according to the rotational drive of the arm.

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