JP4275048B2 - Bar screen device - Google Patents

Description

  The present invention relates to a bar screen device.

  Conventionally, bar screen devices have been used in, for example, sewage treatment facilities. The bar screen device is a device that includes a bar screen formed by laminating long bars at predetermined intervals, and removes contaminants and the like in sewage with the bar screen.

  In many conventional bar screen devices, a bar screen is formed by laminating bars at both ends via spacers. However, due to dimensional errors of bars or spacers, the spacing between bars often deviates from the design value. In addition, in an apparatus provided with a rake that scrapes off foreign substances adhering to the bar screen, there is a risk that a rake will not get caught between the bars.

  On the other hand, a bar screen device is known in which both ends of a bar are supported by a bar holding bar in which a holding groove for inserting the bar is formed (see Patent Document 1 below). The bar screen device disclosed in Patent Document 1 includes a bar holding bar made of a block body having a substantially square shape in plan view. In this bar holding bar, holding grooves opened forward and laterally are formed at regular intervals in the vertical direction, and both ends of the bar are inserted into the holding grooves. A front plate for closing the front of the holding groove is fixed to the front side of the block body.

In the above bar screen device, when assembling the bar, first, the bar is inserted into the holding groove of the right bar holding bar. When all the bars have been inserted, the front plate is fixed to the front side of the right bar holding bar so that the bars do not come off. Next, a left bar holding bar is prepared on the left end side of the bar, and each bar is slid toward the left bar holding bar and inserted into the holding groove. At the right end of each bar, a notch is formed by notching part of the front side. When the bar is slid to the left, a gap is left between the bar holding bar on the right side and the notch of the bar, and the spacer is pushed into this gap. Thereby, each bar is fixed to the bar holding bar on both the left and right sides.
JP-A-8-53825 (FIGS. 10 and 13)

  However, it is difficult to accurately process the grooves opened forward and laterally with respect to the block body having a substantially square shape in plan view. Therefore, even in the bar screen device, it has been difficult to maintain a sufficiently high interval between bars. On the other hand, if it is going to raise the processing precision of a groove, processing cost will become high and will become a factor which hinders cost reduction of an apparatus.

  Moreover, in the said bar screen apparatus, it was necessary to fix a front board to the front side of a block body. Furthermore, the bar had to be slid to the left during assembly, and the spacer had to be pushed into the gap between the bar holding bar and the bar notch. For this reason, there are problems in that the assembly property of the bar is inferior and that the bar cannot be easily replaced during maintenance.

  The present invention has been made in view of the above points, and an object of the present invention is to provide a bar screen device capable of accurately setting the interval between bars. Another object of the present invention is to facilitate assembly or replacement of the bars.

A bar screen device according to the present invention includes a holding plate in which a plurality of through holes are formed along a longitudinal direction, and a plurality of bars that are fitted into the through holes and extend in a direction intersecting the longitudinal direction of the holding plate. The bar has a protrusion that protrudes from the holding plate through the through hole, and includes a fixture that fixes the protrusions of the plurality of bars .

  According to the bar screen device, the bar is fitted into the through hole of the holding plate and is held by the holding plate. Here, since the holding plate is made of a plate-like body, it is easy to accurately form the through hole. Therefore, the bar interval can be kept at a predetermined interval with high accuracy.

Further, the bar can be easily assembled by passing the bar through the through hole of the holding plate and fixing the protruding portions protruding from the through hole with a fixture. Conversely, the bar can be easily removed by removing the fixture and pulling the bar out of the through hole of the holding plate. Therefore, the bar can be easily assembled or replaced.

  Another bar screen device according to the present invention includes first and second holding plates having a plurality of through-holes formed along a longitudinal direction, one end side held by the first holding plate, and the other end side of the first holding plate. A plurality of bars that are held by two holding plates and extend in a direction intersecting with a longitudinal direction of each holding plate, wherein one end of the bar penetrates the first holding plate A protruding piece that is inserted into the hole from the longitudinal direction of the bar and protrudes in a direction intersecting the longitudinal direction of the bar is formed at the other end of the bar, and the protruding piece is the second holding plate. It is inserted in the protruding direction of the protruding piece with respect to the through hole.

  Thus, when attaching the bar to the holding plate, first, one end of the bar is inserted from the longitudinal direction into the through hole of the first holding plate. Next, the protruding piece at the other end of the bar is inserted toward the through hole of the second holding plate. At this time, since the insertion direction on one end side of the bar is different from the insertion direction on the other end side, the bar is easily inserted. Therefore, according to the bar screen device, the bar can be easily assembled or replaced.

  One end of the bar has a first protrusion that protrudes from the first holding plate through the through hole of the first holding plate, and the protruding piece of the bar is the second holding plate. A first protrusion for fixing the first protrusions of the plurality of bars to each other. The second protrusion protrudes from the second holding plate. It is preferable to include a fixture and a second fixture that fixes the second protrusions of the plurality of bars.

  This makes it possible to fix the bar easily. Also, the bar can be easily removed.

  It is preferable that the fixture has a bolt that fixes the protrusions by penetrating the protrusions of the bar.

  Thus, the bars can be easily fixed by passing the bolts through the bars. Moreover, the fixing of the bar can be easily released by pulling out the bolt from each bar.

  It is preferable that the holding plate is formed by overlapping a plurality of plate materials in which through holes are formed.

  The thinner the plate, the easier it is to form through holes with higher dimensional accuracy. Therefore, the accuracy of the through holes of the holding plate can be improved by overlapping the plate materials on which the through holes with high dimensional accuracy are formed. Therefore, according to the bar screen device, the interval between the bars can be maintained with higher accuracy.

  As described above, according to the present invention, the interval between bars can be set with high accuracy. Also, the assembly or replacement of the bar can be facilitated.

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

  As shown in FIG. 1, the bar screen device 1 according to the embodiment is installed in a rainwater discharge chamber 2 of a combined sewerage facility. Although the shape and installation location of the rainwater discharge chamber 2 are not particularly limited, in the present embodiment, the rainwater discharge chamber 2 is formed in a rectangular parallelepiped shape and is embedded under the road. The rain discharge chamber 2 is provided with a weir 3 having a side surface extending in a substantially arc shape. A normal path 4 is formed below the weir 3, and a water increasing path 5 is formed above the weir 3. The bar screen device 1 is installed on the weir 3 and partitions the normal path 4 and the water increasing path 5.

  The normal path 4 is provided with a supply pipe 6 and a first drain pipe 7. The supply pipe 6 is a pipe that supplies the normal path 4 with sewage formed by the combination of drainage discharged from a house or the like and rainwater. The 1st drain pipe 7 is piping which discharges sewage toward the sewage treatment plant etc. which are not illustrated. The discharge port 9 of the first drain pipe 7 is provided at a position lower than the upper end of the weir 3. The supply pipe 6 and the first drain pipe 7 extend in directions orthogonal to each other, and the sewage supplied from the supply pipe 6 flows along the side surface of the weir 3 and is smoothly discharged from the first drain pipe 7. It has become so.

  A second drain pipe 8 is provided in the water increasing channel 5. The 2nd drain pipe 8 is piping which discharges the sewage which flowed into the water increase channel 5 beyond the weir 3 to a river etc. That is, when the amount of rainwater is large, such as during heavy rain, the sewage overflowing from the normal path 4 passes over the weir 3 and is filtered by the bar screen device 1 and then discharged to the river or the like through the second drain pipe 8. . The second drain pipe 8 extends in a direction parallel to the supply pipe 6.

  The bar screen device 1 includes a casing 10 that extends in a substantially arc shape, and a bar screen 80 that is fixed to the front side of the casing 10. In the following description, the normal path 4 side and the water increase path 5 side of the bar screen 80 are referred to as the front side and the back side, respectively. Further, the supply pipe 6 side and the first drain pipe 7 side of the bar screen 80 are referred to as the left side and the right side, respectively. In the present embodiment, the left side of the bar screen 80 is the upstream side of the rake 11, and the right side of the bar screen 80 is the downstream side of the rake 11.

  As shown in FIG. 2, the bar screen device 1 further includes a plurality of rakes 11 that scrape off foreign matters from the bar screen 80, a rake circulation mechanism 12 that circulates and moves the rakes 11, and the dust scraped off by the rakes 11. And a delivery mechanism 13 for delivering an object or the like to the right end of the bar screen 80.

  The bar screen 80 is formed by stacking a plurality of bars vertically at predetermined intervals. As shown in FIG. 3, the bar 20 of the bar screen 80 according to the present embodiment is a horizontal bar extending in an arc shape. The cross-sectional shape of the bar 20 is formed in a substantially rectangular shape. However, the cross-sectional shape of the bar 20 is not limited at all.

  The left end 19 of the bar 20 is formed with a hole 21 for inserting a bolt 29 (see FIG. 2) described later. At the right end of the bar 20, a protruding piece 22 that is orthogonal to the longitudinal direction of the bar 20 and protrudes to the back side is formed. A hole 23 for inserting a bolt is also formed in the protruding piece 22.

  The right side of the bar 20 has a longer depth than the other parts. That is, a step portion 24 whose depth changes is formed in the middle of the bar 20. In the present embodiment, the depth of the bar 20 continuously changes in the step portion 24.

  As shown in FIG. 2, a holder 25 is attached to the front side of the left end of the casing 10, and a holding plate 26 that holds the bar 20 is fixed to the holder 25. The holding plate 26 is disposed so as to be orthogonal to the longitudinal direction of the bar 20.

  As shown in FIG. 4, the holding plate 26 is formed by stacking a plurality of plate members 27 extending in the vertical direction. Each plate member 27 has a plurality of through holes 28 into which the bars 20 are inserted in the longitudinal direction. Since each plate member 27 is thin, the through hole 28 can be formed easily and with high accuracy by, for example, punching or laser processing. However, it is of course possible to form the holding plate 26 with a single plate-like body.

  As shown in FIGS. 5 and 6, the left end portion 19 of the bar 20 is inserted into the through hole 28 of the holding plate 26 from the longitudinal direction of the bar 20, passes through the holding plate 26 and protrudes to the left side. A vertically extending bolt 29 is inserted into the protruding portion protruding to the left side of the holding plate 26. Thereby, the plurality of bars 20 arranged vertically are fixed integrally by the bolts 29.

  As shown in FIG. 2, the holder 25 is also attached to the front side of the right end of the casing 10, and the holding plate 26 is also fixed to the holder 25. However, the rightmost holding plate 26 is disposed in parallel with the longitudinal direction of the bar 20.

  As shown in FIG. 7, the protruding piece 22 at the right end of the bar 20 is inserted into the through hole 28 of the holding plate 26 from the direction orthogonal to the longitudinal direction of the bar 20, passes through the holding plate 26 and protrudes to the back side. Yes. A vertically extending bolt 29 is inserted into the protruding piece 22 protruding to the back side of the holding plate 26. Thereby, the right end portion of the bar 20 is also integrally fixed by the bolt 29. However, unlike the left end portion of the bar 20, the right end portion is fixed on the back side, so that the tip 48 of the right end portion is open (see FIG. 8). That is, the right end 48 of the bar 20 extends to the right end of the bar screen device 1.

  Next, the rake circulation mechanism 12 will be described. As shown in FIG. 2, the rake circulation mechanism 12 is fixed to the first rotating shaft 41 disposed on the right side of the bar screen device 1, the second rotating shaft 42 disposed on the left side, and the first rotating shaft 41. A pair of upper and lower drive sprockets 31 (see FIG. 9), a pair of upper and lower driven sprockets 30 fixed to the second rotating shaft 42, and a pair of upper and lower chains 34 wound around the drive sprocket 31 and the driven sprockets 30. It has. More specifically, the drive sprocket 31 is disposed on the back side of the stepped portion 24 of the bar 20. The driven sprocket 30 is disposed on the center side of the left end 19 of the bar 20. A drive motor 49 (see FIG. 9) is attached to the first rotating shaft 41. Therefore, the first rotating shaft 41 is driven by the drive motor 49.

  An intermediate sprocket 32 that guides the travel of the chain 34 and applies tension to the chain 34 is disposed between the drive sprocket 31 and the driven sprocket 30. One intermediate sprocket 32 is also provided one above the other. Further, guides 33 for guiding the chain 34 are provided between the drive sprocket 31 and the intermediate sprocket 32 and between the driven sprocket 30 and the intermediate sprocket 32, respectively. The chain 34 is arranged in an arc shape by the intermediate sprocket 32 and the guide 33.

  In the present embodiment, four rakes 11 are connected to the chain 34. As shown in FIG. 9, the rake 11 is formed in a comb-like shape and is inserted into the gap of the bar 20. When the rake 11 is orthogonal to the bar 20, the tip of the rake 11 protrudes forward of the bar 20. That is, the length of the rake 11 is longer than the depth of the bar 20.

  The back side of the rake 11 is fixed to a support member 50, and the support members 50 are attached to the upper and lower chains 34, respectively. Therefore, the rake 11 is fixed to the chain 34, and when the chain 34 travels, the rake 11 moves along the circular arc-shaped circulation path according to the chain 34. Note that a broken line 51 in FIG. 2 indicates the locus of the tip of the rake 11 during the circular movement.

  Next, the circulating movement of the rake 11 will be described. As shown in FIG. 2, the rake 11 moves from the right side to the left side on the back side of the bar screen device 1, and moves from the left side to the right side while entering the gap of the bar 20 on the front side of the bar screen device 1.

  That is, the rake 11 goes around the driven sprocket 30 and moves from the back side to the front side, and then enters the gap from the left side of the bar 20. The rake 11 moves in an arc along the longitudinal direction of the bar 20 while scraping off the foreign matter accumulated in the bar 20. Thereafter, the rake 11 moves to the front of the drive sprocket 31 and circulates around the drive sprocket 31 from the front side to the back side. At this time, the rake 11 is removed from the gap of the bar 20 at the step portion 24 of the bar 20. Therefore, the step portion 24 becomes a separation portion where the rake 11 is separated from the bar 20. The rake 11 that circulates around the drive sprocket 31 moves from the right side to the left side on the back side of the bar screen device 1 and reaches the driven sprocket 30 again. Thereafter, the above-described operation is repeated.

  At the step portion 24 where the rake 11 is separated from the bar 20, the impurities on the bar 20 can no longer be scraped off by the rake 11. Therefore, in the present embodiment, the foreign matter carried to the step portion 24 by the rake 11 is sent out to the right end of the bar 20 by the feed mechanism 13. Next, the delivery mechanism 13 will be described.

  As shown in FIGS. 10 and 11, the delivery mechanism 13 includes a T-shaped delivery bar 60 inserted into the gap of the bar 20. As shown in FIG. 10, the delivery bar 60 is stacked up and down via a spacer 64 and is integrally attached to the support member 63. The back side of the support member 63 is fixed to the connecting rod 61 via the swing arm 62. At the left end of the delivery bar 60, an inclined portion is formed along the step portion 24.

  As shown in FIG. 11, the connecting rod 61 is fitted into the first crankshaft 43 and the second crankshaft 44. As shown in FIG. 10, sprockets 36 are provided at the upper and lower ends of the first crankshaft 43. As shown in FIG. 11, a sprocket 37 is provided at the lower end portion of the second crankshaft 44. A chain 39 is wound around the sprocket 36 at the lower end of the first crankshaft 43 and the sprocket 37 of the second crankshaft 44. Thereby, the 1st crankshaft 43 and the 2nd crankshaft 44 interlock | cooperate, and the connection rod 61 rock | fluctuates so that a circle may be drawn.

  As shown in FIG. 9, a sprocket 35 is provided at the upper end portion of the first rotation shaft 41. The sprocket 35 and the sprocket 36 above the first crankshaft 43 are connected by a chain 38. Accordingly, the first crankshaft 43 rotates together with the first rotating shaft 41.

  As described above, the first rotating shaft 41 is rotated by the drive motor 49. The first rotating shaft 41 and the second rotating shaft 42 are connected via a chain 34, and the first rotating shaft 41 and the first crankshaft 43 are connected via a chain 38. Further, the first crankshaft 43 and the second crankshaft 44 are connected via a chain 39. Therefore, in the present embodiment, all of the first rotating shaft 41, the second rotating shaft 42, the first crankshaft 43, and the second crankshaft 44 can be driven by the single drive motor 49.

  As described above, the delivery bar 60 is formed in a T shape having a wide tip side. As shown in FIG. 11, the lateral width on the front end side of the delivery bar 60 is slightly shorter than the distance between the stepped portion 24 of the bar 20 and the right end 48. Since the delivery bar 60 is connected to the connecting rod 61, it swings in a counterclockwise direction in FIG. That is, the delivery bar 60 swings so as to sequentially deliver the foreign matter accumulated in the gap between the bars 20 toward the right end 48.

  By the way, in the vicinity of the stepped portion 24, the locus of the rake 11 and the locus of the delivery bar 60 are partially overlapped in order to facilitate the delivery of impurities from the rake 11 to the delivery bar 60. Therefore, in the present embodiment, the circulation movement of the rake 11 and the swinging of the delivery bar 60 are synchronized so that the rake 11 and the delivery bar 60 do not interfere with each other.

  Specifically, as shown in the order of FIGS. 12 to 18, when the rake 11 approaches the stepped portion 24, the delivery bar 60 is moved to a position away from the stepped portion 24. When moving away from the stepped portion 24, the delivery bar 60 is brought closer to the stepped portion 24. Such a tuning operation can prevent interference between the rake 11 and the delivery bar 60. In addition, according to the structure of this embodiment, the said synchronization can be easily implement | achieved by adjusting the number of teeth of the sprockets 35 and 36, etc.

  As shown in FIG. 11, a closing plate 70 that prevents passage of sewage is disposed on the back side of the right end portion of the bar 20. Although the size of the closing plate 70 is not particularly limited, in this embodiment, the lateral width of the closing plate 70 (the length in the direction along the longitudinal direction of the bar 20) is about 1 / width of the width of the delivery bar 60. The length is 3 to 1/4.

  As described above, according to the bar screen device 1 according to the present embodiment, the bar 20 is held by the holding plate 26 in which the through hole 28 is formed. According to the present embodiment, the through hole 28 can be formed with high accuracy. Therefore, the interval between the bars 20 can be accurately maintained.

  In particular, according to the present embodiment, the holding plate 26 is formed by laminating a plurality of plate materials 27. Therefore, the thickness of each plate member 27 is small. Therefore, the through hole 28 can be easily and highly accurately formed by punching or laser processing.

  In the present embodiment, the left end 19 of the bar 20 is passed through the through hole 28, and the portion protruding from the holding plate 26 is integrally fixed by the bolt 29. Therefore, the bar 20 can be easily assembled. Further, the bar 20 can be easily removed during maintenance or replacement. Therefore, the assembly or replacement of the bar 20 can be easily performed.

  Further, according to the present embodiment, the protruding piece 22 that protrudes in the direction orthogonal to the longitudinal direction of the bar 20 is provided on the right side of the bar 20. Then, after fixing the left end 19 of the bar 20 to the holding plate 26, the protruding piece 22 on the right side of the bar 20 is passed through the through hole 28 of the other holding plate 26, and the portion protruding from the holding plate 26 is It was decided to be fixed integrally. Therefore, the right side portion of the bar 20 can also be easily fixed and can be easily removed.

  Moreover, according to this embodiment, since the insertion direction of the left end part 19 of the bar 20 and the insertion direction of the right end part are different, the attachment or removal of the bar 20 can be easily performed.

  In addition, in the said embodiment, although the bar 20 was circular arc shape, the bar 20 may be formed in linear form. The shape of the bar 20 is not particularly limited. Further, the bar 20 is not limited to a horizontal bar but may be a vertical bar or the like.

  As described above, the present invention is useful for a bar screen device.

It is a perspective view of a rainwater spout chamber. It is sectional drawing which shows the internal structure of a bar screen apparatus. It is a top view of a bar. It is a perspective view of a holding plate. It is a front view of the left end part of a bar screen apparatus. It is a side view of the left end part of a bar screen apparatus. It is a side view of the right end part of a bar screen apparatus. It is a front view of the right end part of a bar screen apparatus. It is the IX-IX sectional view taken on the line of FIG. FIG. 3 is a sectional view taken along line XX in FIG. 2. It is sectional drawing of a delivery mechanism. It is sectional drawing of the right side part of a bar screen apparatus. It is sectional drawing of the right side part of a bar screen apparatus. It is sectional drawing of the right side part of a bar screen apparatus. It is sectional drawing of the right side part of a bar screen apparatus. It is sectional drawing of the right side part of a bar screen apparatus. It is sectional drawing of the right side part of a bar screen apparatus. It is sectional drawing of the right side part of a bar screen apparatus.

DESCRIPTION OF SYMBOLS 1 Bar screen apparatus 3 Weir 11 Rake 12 Rake circulation mechanism 13 Delivery mechanism 19 Left end part (protrusion part) of bar
20 bar 22 projecting piece 24 step part (separation part)
26 Holding plate 27 Plate material 28 Through hole 29 Bolt (fixing tool)

Claims (5)

A holding plate in which a plurality of through holes are formed along the longitudinal direction;
A plurality of bars that are fitted into the through holes and extend in a direction intersecting with the longitudinal direction of the holding plate ;
The bar has a protruding portion that protrudes from the holding plate through the through hole,
The bar screen apparatus provided with the fixing tool which fixes the protrusion parts of the said several bar . A first and a second holding plate in which a plurality of through holes are formed along the longitudinal direction;
One end side is held by the first holding plate, the other end side is held by the second holding plate, a plurality of bars extending in a direction intersecting the longitudinal direction of each holding plate,
A bar screen device comprising:
One end of the bar is inserted from the longitudinal direction of the bar into the through hole of the first holding plate,
At the other end of the bar, a protruding piece protruding in a direction intersecting the longitudinal direction of the bar is formed,
The bar screen device, wherein the protruding piece is inserted in the protruding direction of the protruding piece with respect to the through hole of the second holding plate. One end of the bar has a first protrusion that protrudes from the first holding plate through the through hole of the first holding plate,
The protruding piece of the bar has a second protruding portion that protrudes from the second holding plate through the through hole of the second holding plate,
A first fixture for fixing the first protrusions of the plurality of bars;
A second fixture for fixing the second protrusions of the plurality of bars;
The bar screen device according to claim 2, comprising: 4. The bar screen device according to claim 1, wherein the fixture includes a bolt that fixes the protrusions by penetrating the protrusions of the bar. 5. The bar screen device according to claim 1, wherein the holding plate is formed by overlapping a plurality of plate materials in which through holes are formed.

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