JP2009241023A - Endless-chain driving structure for use in sludge scraper - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To make it possible to efficiently drive/turn an endless chain in the direction reverse to the turning direction for scraping sludge, and to prevent the deformation of a link plate and a shaft member as well. <P>SOLUTION: The endless-chain driving structure for use in a sludge scraper is equipped with shaft members 10 each attached to a driving rotor 3 and engaging with notches 14 each formed on an endless chain 2 to which sludge scraping members are to be attached. The shape of the notches 14 is so formed that the notches 14 each have an engaging part 33 for the normal rotation with which each of the shaft members 10 is allowed to engage along its outer circumferential face upon turning the endless chain 2 in the turning direction for scraping sludge, and another engaging part 34 for the reverse rotation which allows each of the shaft members 10 to engage along its outer circumferential face upon driving and turning the endless chain 2 in the direction reverse to the turning direction for scraping sludge. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention includes an endless chain to which a sludge scraping tool is attached at an interval in the rotation direction, and a drive rotator that is driven to rotate by winding the endless chain, and is provided on the periphery of the drive rotator. Is provided with a posture in which a plurality of shaft members are arranged along the rotation axis at intervals in the circumferential direction, the endless chain is provided between the link plates adjacent in the rotation direction, and the plate surface of the drive rotating body. A notch that engages the shaft member is formed at each side edge of the link plate on the side of the drive rotator. The present invention relates to a drive structure for an endless chain in a sludge scraper configured to rotate the drive rotating body with a shaft member engaged to drive and rotate the endless chain.

  In the conventional endless chain drive structure in the sludge scraping machine, as shown in FIG. 8, the shape of the notch 14 is used when the endless chain 2 is rotated in the sludge scraping rotation direction (forward rotation direction). The forward rotation engaging portion 33 with which the shaft member 10 can be engaged along the outer peripheral surface thereof, and the continuous portion of the forward rotation engaging portion 33 continuously connected in succession to the upper edge of the sludge scraping rotation direction. 35, and the continuous portion 35 is formed substantially parallel to a line segment H connecting the axial centers of the pair of front and rear connecting pins 41 connecting the link plates 12 (for example, (See Patent Document 1).

Japanese Patent Laid-Open No. 2002-3214

For this reason, when it is necessary to drive and rotate the endless chain 2 in the direction opposite to the sludge scraping rotation direction (reverse direction), as shown in FIG. 8, the shaft member 10 and the link plate 12 Is aligned with the line along the axial direction of the shaft member 10, the shaft member 10 and the link plate 12 are easily slipped from each other, and it is difficult to efficiently drive and rotate the endless chain 2 in the reverse direction. There is a defect that the link plate 12 and the shaft member 10 are easily deformed by the pressure acting on the link plate 12 along the line contact portion.
The present invention has been made in view of the above circumstances, and can efficiently drive and rotate the endless chain in the direction opposite to the sludge scraping rotation direction, and deformation of the link plate and the shaft member is unlikely to occur. The purpose is to be.

The first characteristic configuration of the present invention includes an endless chain to which a sludge scraper is attached at an interval in the rotation direction, and a drive rotating body that is driven and rotated by winding the endless chain,
A plurality of shaft members are provided in the circumferential portion of the drive rotating body in a posture along the rotation axis at intervals in the circumferential direction, and the endless chain connects each of the link plates adjacent in the rotation direction. The plate surface is configured to be relatively swingable in a posture along the radial direction of the drive rotating body,
A notch for engaging the shaft member is formed on each side edge of the link plate on the side of the drive rotator, and the drive rotator is rotated with the shaft member engaged with the notch. The endless chain drive structure in the sludge scraper configured to drive and rotate the endless chain,
When the shape of the notch rotates the endless chain in the sludge scraping rotation direction, the shaft member can engage with the forward rotation engaging portion along the outer peripheral surface, and the endless chain is sludged. The shaft member is formed in a shape including an engaging portion for reverse rotation that can be engaged along the outer peripheral surface when driving and rotating in a direction opposite to the rotation direction for scraping. .

[Action and effect]
When the notch shape rotates the endless chain in the sludge scraping rotation direction, the forward rotation engaging portion where the shaft member can engage along the outer peripheral surface, and the endless chain for sludge scraping rotation When the shaft member is driven and rotated in the direction opposite to the moving direction, the shaft member is provided with an engaging portion for reverse rotation that can be engaged along the outer peripheral surface thereof, so that the endless chain is moved in the sludge scraping turning direction. Even when rotating the endless chain in the direction opposite to the sludge scraping rotation direction, the shaft member and the link plate are in contact with each other, and the endless chain is rotated in the sludge scraping direction. When driving and rotating in the opposite direction, the pressing force by the shaft member is distributed and applied to the surface contact portion with respect to the link plate, so that the deformation of the link plate and the shaft member can be prevented and the shaft member and the link can be prevented. The plates slide against each other Kunar.
Therefore, the endless chain can be efficiently driven and rotated in the direction opposite to the sludge scraping rotation direction, and deformation of the link plate and the shaft member hardly occurs.

  According to a second characteristic configuration of the present invention, the shape of the notch is such that the edges of the forward rotation engagement portion and the reverse rotation engagement portion that are opposed to each other in the chain rotation direction are the rotation locus of the shaft member. It is in the point formed in the shape provided with the continuous part which continues substantially parallel.

[Action and effect]
Smooth switching is possible both when switching from normal rotation to reverse rotation and when switching from reverse rotation to normal rotation.

  A third characteristic configuration of the present invention is that the reverse engaging portion is reinforced.

[Action and effect]
It is possible to prevent the strength of the link plate from being reduced due to the formation of the reverse engaging portion.

  According to a fourth characteristic configuration of the present invention, each of the forward rotation engaging portion and the reverse rotation engaging portion is substantially along the shape of the notch at a side edge portion of the link plate opposite to the drive rotor side. In this shape, a bulging portion that bulges in the direction along the plate surface is formed and reinforced.

[Action and effect]
A bulging portion can be formed on the link plate to reinforce each of the forward rotation engaging portion and the reverse rotation engaging portion.

  In the fifth characteristic configuration of the present invention, each of the forward rotation engaging portion and the reverse rotation engaging portion is reinforced by providing a flange having a flange surface that is flush with the end surface of the link plate. In the point.

[Action and effect]
When rotating the endless chain in the sludge scraping rotation direction or when driving the endless chain in the direction opposite to the sludge scraping rotation direction, the shaft member and the link plate are faced over a wide area. The link plate and the shaft member are less likely to be deformed.

  According to a sixth characteristic configuration of the present invention, the notch is formed so as to be shifted to the upper side of the link plate in the sludge scraping rotation direction.

[Action and effect]
Since the notch is formed by shifting to the upper side in the rotation direction for sludge scraping of the link plate, the position of each link plate at the place where the drive rotating body is wound is driven when the endless chain is driven. The posture approximately along the tangential direction with respect to the rotating body, that is, the line segment connecting the shaft cores of the pair of front and rear connecting pins connecting the link plates is maintained in the posture approximately along the tangential direction of the driving rotating body. It is easy and the endless chain can be driven and rotated smoothly.
That is, of the endless chain wound around the drive rotator, the upper endless chain portion in the turning direction for sludge scraping that is pulled along with the drive rotation of the drive rotator, Since a stronger tension acts on the lower end side chain portion on the lower side in the moving direction, the link plate on which the shaft member is engaged with the notch is closer to the upper side in the rotation direction for sludge scraping than the shaft member. The tension acting on the upper link plate part is greater than the tension acting on the lower link plate part on the lower side in the rotational direction for sludge scraping than the shaft member, and the lower link plate part uses the shaft member as a fulcrum. Thus, it is easy to swing in the direction of lifting from the drive rotator.
For this reason, it is easy to balance the moment generated by the strong tension acting on the upper link plate portion around the fulcrum and the moment generated by the weak tension acting on the lower link plate portion around the fulcrum. In this way, the notch is formed so as to be shifted to the upper side in the sludge scraping rotation direction, so that it is difficult for the lower link plate portion to swing in the direction in which the lower link plate is lifted from the driving rotating body when the endless chain is driven to rotate. Therefore, it is easy to maintain the posture of each link plate at the position where the drive rotator is wound around the tangential direction of the drive rotator.

Embodiments of the present invention will be described below with reference to the drawings. In the drawings, the parts indicated by the same reference numerals as those in the conventional example indicate the same or corresponding parts.
FIG. 1 shows a longitudinal section of a sedimentation basin A in a sewage treatment facility, where a sludge scraper B and a scum skimmer C are installed, and the sludge scraper B is provided with a drive structure for an endless chain 2 according to the present invention. ing.

  The sludge scraper B is a drive rotation in which each of a pair of left and right endless chains 2 as endless rotating bodies, to which the sludge scraping tool 1 is attached at intervals in the rotating direction, rotate around a horizontal axis X. A driving device 5 is rotatably wound around a driving sprocket 3 as a body and first to third driven sprockets 4 (4a, 4b, 4c) as driven rotating bodies to drive and rotate the driving sprocket 3. Is provided.

  The drive sprocket 3 is supported near the water surface WL at the longitudinal end of the settling basin A, and the first driven sprocket 4a is supported near the water surface WL at the approximate center in the longitudinal direction of the settling basin A. The driven sprockets 4b and 4c are supported near the bottom surface 6 at both longitudinal ends of the sedimentation basin A.

  As shown in FIG. 2, the drive sprocket 3 is provided with two disk members 9 concentrically parallel to each other on the outer peripheral side of a boss 8 through which the rotary shaft member 7 is inserted. A plurality of cylindrical pin members engaging pins 10 are fixed in a posture along the rotation axis X at equal intervals in the circumferential direction across the plate member 9, and the first to third driven sprockets 4 a, As shown in FIG. 3, each of 4b and 4c is provided with a circumferential groove 11 into which the endless chain 2 is inserted in the outer peripheral portion thereof.

  As shown in FIG. 2, the endless chain 2 is configured such that the link plates 12 adjacent to each other in the rotation direction can be relatively swung by a connecting pin 41 with the plate surface along the radial direction of the drive sprocket 3. The link plate 12 is composed of a notch chain made of synthetic resin, and a notch 14 for engaging the engagement pin 10 with a side edge portion 13 of each link plate 12 on the side of the drive sprocket 3 is used to scrape the sludge of the link plate 12. It is formed by shifting to the upper side in the rotation direction (forward rotation direction).

  The notch chain 2 is inserted between the two disk members 9 in the drive sprocket 3 and the first to third driven sprockets 4a, 4b, and 4c, and the engagement pin 10 is engaged with the notch 14. The drive sprocket 3 is driven and rotated by the drive device 5 to drive and rotate the pair of left and right notch chains 2 so that each of the sludge scrapers 1 is driven by the drive sprocket 3, the first driven sprocket 4a, the second driven sprocket 4b, Circulating and moving in the order of the third driven sprocket 4c, the scum floating near the water surface WL of the sedimentation basin A is scraped to the scum skimmer C side by moving from the drive sprocket 3 side toward the first driven sprocket 4a side. The sludge settled near the bottom surface 6 of the sedimentation basin A due to the movement from the second driven sprocket 4b side to the third driven sprocket 4c side. To scrape the Aru discharge groove 15 provided in the bottom of the sedimentation tank A it is configured to allow.

  The non-winding portion of the notch chain 2 with respect to the sprockets 3, 4a, 4b, 4c, specifically, the non-winding portion between the first driven sprocket 4a and the second driven sprocket 4b as shown in FIG. A pressing member 17 is provided to apply tension to the notch chain 2 by pressing 16 toward the inner peripheral side from the outer peripheral side of the rotation path.

  As shown in FIGS. 3 and 4, the pressing member 17 is constituted by an idle roller as a rotatable member that can be rotated by the rotational movement of the notch chain 2. The first driven sprocket 4a is supported on the swing member 19 so as to be rotatable around a rotation axis Y substantially parallel to the rotation horizontal axis X of the first driven sprocket 4a. The swing member 19 supports the driven sprocket 4a so as to be rotatable. The supporting shaft member 20 is supported so as to be capable of swinging by its own weight around a swing axis Z that is substantially parallel to the rotary horizontal axis X of the driven sprocket 4a.

  The swing member 19 includes a pair of left and right swing arms 21 and a connecting frame 22 that detachably connects the free end sides of the pair of swing arms 21 to each other. Is connected to a bracket 23 fixed to the support shaft member 20 of the first driven sprocket 4a, and the axis of the pin is used as an oscillation axis Z. A function as a weight for increasing the horizontal distance L1 between the center of gravity position P1 of the member 19 and the swing axis Z is provided.

If necessary, the connecting frame 22 is replaced with a connecting frame 22 having a different weight, and the swing member 19 is provided so that its weight W can be adjusted.
The connecting frame 22 is omitted, and a weight member having a function as a weight is detachably fixed to the free end side of each of the pair of swinging arms 21, so that the weight members having different weights as necessary. And the swing member 19 may be provided so that its weight W can be adjusted.

  Each of the swing arms 21 is formed in a shape in which a substantially central portion in the longitudinal direction bends upward, that is, in the shape of a dogleg in a side view, and the support members are located near the bent portions of the pair of swing arms 21. 24, each of the pair of idle rollers 17 is supported on the support shaft member 24 so as to be rotatable around the rotation axis Y.

  As shown in FIG. 5, the idler roller 17 is configured by connecting two parallel disk members 25 inserted through the support shaft member 24 with bolts connected to each other with a spacer 26 interposed therebetween. A retaining member 27 of the idle roller 17 is fixed to the support shaft member 24.

  Steps 28 as guides are formed annularly on the inner peripheral edges of the two disk members 25 facing each other, and the outer peripheral side of the link plate 12 is inserted between the step portions 28, so that A movement restricting portion for restricting relative movement of the roller 17 and the notch chain 2 in the direction along the swing axis Z is provided.

  Then, as shown in FIG. 4, an imaginary line segment D along the pressing direction of the idle roller 17 against the notch chain 2 through the pressing position P <b> 2 with respect to the notch chain 2, and the swing axis Z The distance L2 along the direction perpendicular to the imaginary line segment D is shorter than the horizontal distance L1 between the center of gravity position P1 of the swing member 19 and the swing axis Z, and the swing member 19 The swing member 19 is supported so that the gravity center position P1 is held at a position higher than the swing axis Z.

  As shown in FIG. 6, the link plate 12 constituting the notch chain 2 sandwiches both side surfaces of the link plate 12 adjacent to the upper side in the sludge scraping rotation direction (forward rotation direction). For the pair of outer plate portions 30 formed with bosses 29 through which the connection pins 41 for connection are formed and the link plate 12 adjacent to the lower side of the sludge scraping rotation direction (forward rotation direction) , Formed in a substantially Y shape in a plan view with an inner plate portion 32 having a boss 31 through which a connecting pin 41 is inserted so as to be sandwiched between the pair of outer plate portions 30. A notch 14 is formed in the side edge portion 13 of the plate portion 30 facing the drive sprocket 3 side.

  As shown in FIG. 7, the shape of the notch 14 is such that when the notch chain 2 is rotated in the sludge scraping rotation direction (forward rotation direction), the engagement pin 10 is a series along the outer peripheral surface thereof. When the forward rotation engaging portion 33 and the notch chain 2 are driven and rotated in a direction opposite to the sludge scraping rotation direction (reverse rotation direction), the engagement pin 10 has an outer periphery. An arcuate reverse rotation engaging portion 34 that can be engaged in series along the surface, and edges that are opposed to each other in the chain rotation direction of the forward rotation engaging portion 33 and the reverse rotation engaging portion 34 are engaged with each other. The pin 10 is formed in a shape including a continuous portion 35 that is continuously arranged along the rotation locus E of the pin 10 in a substantially parallel manner.

  Further, in order to reinforce each of the forward rotation engaging portion 33 and the reverse rotation engaging portion 34, the side edge portion 36 of the link plate 12 facing in the direction opposite to the drive sprocket 3 side substantially follows the shape of the notch 14. A bulging portion 37 that bulges in the direction along the plate surface is formed, and a flange 39 having a flange surface 38 that is flush with the end surface forming the notch 14 is formed on the periphery of the notch 14. The forward rotation engagement portion 33 and the reverse rotation engagement portion 34 are provided in a series over the pair of outer plate portions 30.

Each of the forward rotation engagement portion 33 and the reverse rotation engagement portion 34 is optimally arcuate, but may be arcuate such as an elliptical part.
In addition, in order to reinforce each of the forward rotation engaging portion 33 and the reverse rotation engaging portion 34, a strong member may be attached to or embedded in the notch 14 forming portion.

Vertical section of sedimentation pond (A) Partially cutaway side view showing meshing between endless rotating body and drive rotating body, (b) Main part plan view showing meshing between endless rotating body and driving rotating body Plan view of main parts Side view of the main part Cross section of the main part (A) Plan view of main part, (b) Side view of main part, (c) Bottom view of main part An enlarged side view showing the meshing between the endless rotating body and the drive rotating body Enlarged side view showing the meshing between the conventional endless chain and the drive rotor

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Sludge scraping tool 2 Endless chain 3 Drive rotary body 10 Cylindrical shaft member 12 Link plate 13 Side edge part on the drive rotary body 14 Notch 33 Forward rotation engagement part 34 Reverse rotation engagement part 35 Continuous part 36 Drive rotary body side and Is the opposite side edge 37 bulge 38 flange surface 39 flange X axis of rotation

Claims (6)

An endless chain to which a sludge scraper is attached at an interval in the direction of rotation, and a drive rotator for driving and rotating the endless chain,
A plurality of shaft members are provided on the periphery of the drive rotator in a posture along the rotation axis at intervals in the circumferential direction,
The endless chain is configured by connecting the link plates adjacent to each other in the rotation direction so that the plate surfaces are relatively swingable in a posture along the radial direction of the drive rotating body,
A notch for engaging the shaft member is formed on each side edge of the link plate on the side of the drive rotator,
The drive structure of the endless chain in the sludge scraper configured to rotate the drive rotating body with the shaft member engaged with the notch to drive and rotate the endless chain,
When the shape of the notch rotates the endless chain in the sludge scraping rotation direction, the shaft member can engage with the forward rotation engaging portion along the outer peripheral surface, and the endless chain is sludged. Sludge scraping formed in a shape including an engaging portion for reverse rotation that allows the shaft member to engage along the outer peripheral surface when driving and rotating in a direction opposite to the rotation direction for scraping. Drive structure of endless chain in the machine.   The notch has a continuous portion in which the edges of the forward rotation engagement portion and the reverse rotation engagement portion facing each other in the chain rotation direction are substantially parallel to the rotation locus of the shaft member. The drive structure of the endless chain in the sludge scraping machine of Claim 1 currently formed in the shape which was formed.   The drive structure of the endless chain in the sludge scraper according to claim 1 or 2, wherein the reverse engaging portion is reinforced.   Each of the forward rotation engagement portion and the reverse rotation engagement portion is formed on the side edge of the link plate opposite to the drive rotor side in a direction along the plate surface in a shape substantially along the shape of the notch. The drive structure of the endless chain in the sludge scraper according to claim 3, wherein the swelled portion is formed and reinforced.   The sludge scraper according to claim 3 or 4, wherein each of the forward rotation engaging portion and the reverse rotation engaging portion is reinforced by providing a flange having a flange surface that is flush with an end surface of the link plate. Drive structure of endless chain in a pallet.   The drive structure of the endless chain in the sludge scraper according to any one of claims 1 to 5, wherein the notch is formed so as to be shifted to the upper side in the rotational direction for sludge scraping of the link plate.

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