JP2011094698A - Sprocket for sludge scraper, and sludge scraper - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sprocket that has shaft members easily removable from side plates, and a sludge scraper having the sprocket. <P>SOLUTION: A pair of side plates 9 each have notches D extended from the circumference edge of the side plates 9 in a plurality of circumferentially spaced positions, and the endless chain engaging shaft members 30 between the pair of side plates 9 are removably attached to the surfaces of the side plates 9 via the notches D. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  A sprocket for a sludge scraper in which shaft members for endless chain engagement between a pair of side plates are attached to a plurality of locations spaced apart in the circumferential direction on each of the pair of side plates, and the sprocket and sludge scraper The present invention relates to a sludge scraper provided with an endless chain attached at intervals in the rotational direction.

  Conventionally, in the sprocket of the sludge scraper, the attachment portion for attaching the shaft member is merely formed with a round hole at a position near the rotation center from the peripheral edge portion of the side plate. Each side plate was inserted into a round hole in the axial direction from the end portion, and nuts were attached to both ends and fixed to the side plate (see, for example, Patent Document 1).

Japanese Patent No. 3589162

The above-described conventional sprocket and the sludge scraper provided with the sprocket are formed on the side plate by removing the nuts attached to both ends of the shaft member when the need to replace the shaft member due to wear occurs. The shaft member cannot be removed from the round hole unless the shaft member is completely removed in the axial direction, which takes a lot of work to replace, and prevents the nut from loosening due to the vibration of the sludge scraper. Therefore, if a nut with a locking function is used, the replacement workability is worse.
Moreover, generally, the sprocket of the sludge scraper is often installed at a high place, and the workability is worse.

  Accordingly, an object of the present invention is to provide a sprocket that solves the above-mentioned problems and enables the shaft member to be easily detached from the side plate, and a sludge scraper provided with the sprocket.

  The first characteristic configuration of the sprocket of the present invention is a plurality of locations spaced in the circumferential direction on each of the pair of side plates, provided with notches on the peripheral edge of the side plate, for endless chain engagement between the pair of side plates. The shaft member is detachably attached to the surface of the side plate through the notch.

According to the first characteristic configuration of the present invention, when the shaft member needs to be replaced, the side plate can be removed without removing the nut and extracting the shaft member in the axial direction from the round holes of the pair of side plates as in the prior art. The shaft member can be removed simply by loosening the shaft member and slightly moving the shaft member along the surface of the side plate through the notches formed in the pair of side plates.
Therefore, even when working at a high place, the replacement work can be easily performed with little effort.

  According to a second characteristic configuration of the present invention, there is provided a retaining member for preventing the shaft member from coming out of the notch.

According to the second characteristic configuration of the present invention, in addition to being able to achieve the above-described operational effects according to the first characteristic configuration of the present invention, the vibration of the sludge scraper, for example, the shaft member Even if the fixing is loosened, the retaining member can prevent the shaft member from being pulled out through the notch.
Therefore, the sludge scraper can be used stably over a long period of time.

  According to a third characteristic configuration of the present invention, the notch direction of each of the notch portions is formed radially from the rotation center of the side plate, and the retaining member includes a plurality of the shaft members attached to the side plate. A locking portion for locking is provided to form a collective retaining member that prevents the shaft member from coming out of each notch.

According to the third characteristic configuration of the present invention, since the notch direction of each notch is formed radially from the rotation center of the side plate, the shaft member attached through each notch is When removing from the side plate, it comes out in different directions. Therefore, by providing the retaining member with a retaining portion that latches each of the plurality of shaft members attached to the side plate, even if the plurality of shaft members loosen unexpectedly and try to come out from the notch portion, The locking portions of the retaining members that lock the shaft members are pulled in different directions, thereby preventing the shaft members from coming out.
Therefore, the shaft member can be prevented from falling off from the side plate with a simple structure, and the retaining member can function as a collective retaining member.

  According to a fourth characteristic configuration of the present invention, the retaining member includes a collective retaining member that prevents the shaft members attached to the side plates from coming out of the respective notches, and the collective retaining member is provided. The stop member is detachably attached to the side plate via a bolt.

  According to the fourth characteristic configuration of the present invention, it is possible to prevent a plurality of shaft members from coming out of the notch portion at once by the collective retaining member, and to remove a plurality of bolts by removing the bolts and removing the collective retaining member from the side plate. The shaft members can be easily removed at the same time, and the shaft member replacement work becomes easier.

  According to a fifth characteristic configuration of the present invention, the collective retaining member is a notch that latches the shaft member and releases the latched state with the shaft member by moving along the surface of the side plate. A groove is provided corresponding to each of a plurality of shaft members, and the notch directions of the notch portion and the notch groove for locking the shaft member are different.

  According to the fifth feature of the present invention, the plurality of shaft members are prevented from coming out more stably at a time by locking each of the plurality of shaft members by the notch grooves provided in the collective retaining member. In addition, by changing the notch direction between the notch portion and the notch groove for locking the shaft member, even if the shaft member tries to come out from the notch portion, the notch as an obstacle in the withdrawal direction With the inner surface of the groove, the shaft member can be reliably prevented from coming out.

  The sludge scraper in the sixth feature configuration of the present invention is provided with an endless chain to which a sludge scraper is attached at intervals in the rotational direction, and a plurality of locations spaced in the circumferential direction on each of the pair of side plates. A notch is provided at the peripheral edge of the side plate, and a sprocket is provided in which a shaft member for endless chain engagement between the pair of side plates is detachably provided along the surface of the side plate through the notch. The endless chain connects the link plates adjacent to each other in the rotational direction so as to be relatively swingable in a posture along the radial direction of the sprocket, and each sprocket side of the link plate. A notch that engages with the shaft member is formed at an edge, and the sprocket is rotated with the shaft member engaged with the notch so that the endless chain is driven to rotate. There is where you have configured.

  According to the sixth characteristic configuration of the present invention, the shaft member can be easily replaced in the sprocket as described above, and the length of the endless chain can be reduced by simply removing the shaft member and loosening the endless chain. The maintenance has been made easier by eliminating the chain elongation.

It is the whole longitudinal cross-sectional view of the sewage treatment equipment provided with the scraper. It is a partially cutaway front view of a sprocket. It is a cross-sectional top view of a sprocket. It is a perspective view of a sprocket. It is a disassembled perspective view of a sprocket. It is a principal part front view of a sprocket. It is operation | movement explanatory drawing of the principal part of a sprocket. It is a principal part decomposition | disassembly action figure of a sprocket. It is a principal part decomposition | disassembly action figure of a sprocket. It is a principal part front view of the state which attached the shaft member to the 1st notch part. It is a principal part front view of the state which attached the shaft member to the 2nd notch part. It is a principal part front view of another embodiment. It is a principal part front view of another embodiment.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 shows a longitudinal section of a sedimentation basin A in a sewage treatment facility, in which a sludge scraper B and a scum skimmer C are installed. ing.

  In the sludge scraper B, the 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 rotational direction are arranged around a horizontal axis (rotation center) X. The driving sprocket 3 is rotatably wound around the driving sprocket 3 as a rotating driving rotating body and the first to third driven sprockets 4 (4a, 4b, 4c) as driven rotating bodies. A driving device 5 for driving and rotating the motor is provided.

  The driving 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 third driven sprockets 4b and 4c are supported near the bottom surface 6 at both longitudinal ends of the settling basin A.

  As shown in FIG. 2, the drive sprocket 3 has two disk-like side plates 9 provided on the outer peripheral side of the boss 8 through which the rotary shaft member 7 is inserted, in parallel and concentrically with each other. A plurality of cylindrical shaft members 30 in which the plastic bosses 16 are externally fitted to the engagement bolts 10 are fixed in a posture along the horizontal axis X at equal intervals in the circumferential direction. is there.

  As shown in FIG. 2, the endless chain 2 is configured such that the link plates 12 adjacent to each other in the rotating direction can swing relative to each other with a connecting pin 41 such that the plate surface is along the radial direction of the drive sprocket 3. The notch 14 which engages the shaft member 30 with the side edge 13 of each link plate 12 on the side of the drive sprocket 3 is scraped off the sludge of the link plate 12. It is formed so as to be shifted to the upper side in the rotation direction (forward direction) for use.

  Then, with the notch chain 2 inserted between the two side plates 9 in the drive sprocket 3 and the shaft member 30 engaged with the notch 14, the drive sprocket 3 is driven and rotated by the drive device 5. The pair of notch chains 2 are driven and rotated so that each sludge scraper 1 passes through the driving sprocket 3, the first driven sprocket 4a, the second driven sprocket 4b, and the third driven sprocket 4c in this order. The scum floating near the water surface WL of the sedimentation basin A is squeezed to the scum clearance C side by moving from the driving sprocket 3 side to the first driven sprocket 4a side, and the second driven sprocket 4b. The sludge settled near the bottom surface 6 of the sedimentation basin A by the movement from the side toward the third driven sprocket 4c side is discharged at the bottom of the sedimentation basin A It is configured to be able to scrape the 15.

As shown in FIGS. 2 to 11, the driving sprocket 3 has a mounting shaft 17 provided with a plurality of engaging bolts 10 spaced apart in the circumferential direction on the pair of side plates 9, and a horizontal axis X. The nuts 21 are detachably attached in a conforming posture, and a notch portion D connected to the peripheral portion of the side plate 9 is formed in each of the attachment portions 17, and the shaft member 30 is formed along the surface of the side plate 9 through the notch portion D. Is configured to be detachable.
On the side plate 9, a retaining member 18 made of a plate P that prevents the shaft member 30 from coming out through the notch D is detachably attached to the side plate 9 via bolts 19 and nuts 20.

The plate P is provided with a notch groove E as a locking portion that locks the shaft member 30 and allows the locking state with the shaft member 30 to be released by moving along the surface of the side plate 9. A plurality of shaft members 30 are provided so as to correspond to each of the plurality of shaft members 30 so as to be a collective retaining member.
By changing the notch direction of the notch part D and the notch groove E, and changing the relative pulling-out direction of the shaft member 30 with respect to the notch part D and the notch groove E, the shaft member 30 is notched part D. Even if it is about to be pulled out, it is blocked by the inner surface of the notch groove E as an obstacle in the direction of pulling out, so that the shaft member 30 is reliably prevented from coming out, and the shaft member 30 is difficult to come off.
As shown in FIGS. 5 to 9, the cutout portion D connected to the mounting portion 17 and formed integrally is a radially U-shaped cutout along the normal passing through the lateral axis X of the side plate 9. A notch is formed and the opening is directed radially outward.

Further, the notch groove E constitutes a locking portion that locks each of the plurality of shaft members 30 attached to the side plate 9, and the retaining member 18 provided with the locking portion has each notch portion D. It functions as a collective retaining member that prevents the shaft members 30 from coming out of the housing.
That is, since the notch direction of each notch part D is formed radially from the lateral axis X of the side plate 9, the shaft member 30 attached through each notch part D is removed from the side plate 9. Get out in different directions. Therefore, the retaining member 18 is provided with a locking portion for locking each of the plurality of shaft members 30 attached to the side plate 9, so that the plurality of shaft members 30 may be loosened unexpectedly and come out of the notch portion. The engaging portions of the retaining members 18 that retain the shaft members 30 are pulled in different directions to prevent the plurality of shaft members 30 from coming out.

  The plate P is formed in an arc shape along the outer peripheral portion of the side plate 9, and the notch groove E is formed on the laterally long groove portion 22 along the circumferential direction of the side plate 9 and the lateral axis X side of the side plate 9. A key shape is formed in which the notched open groove portions 23 are connected, and the open groove portions 23 of the plurality of notched grooves E are parallel to each other. Accordingly, when the bolt 19 is removed and the plate P is removed from the plurality of shaft members 30, the plate is changed so that the shaft member 30 moves relatively in the laterally long groove portion 22 as shown in FIG. P is slid in the circumferential direction, and thereafter, as shown in FIG. 8, a plurality of shaft members 30 are configured to be able to be removed from the notch groove E at the same time. That is, the shaft member 30 is detached from the side plate 9 after the plate P is removed, as shown in FIG.

As shown in FIGS. 2, 10, and 11, the notch D is formed by replacing the plurality of first notches D <b> 1 having a large notch depth with the circumferential direction of the side plate 9 on the same first circumference S <b> 1. In addition to being formed at regular intervals, a plurality of second notches D2 having a slightly shallower depth are formed on the same second circumference S2 (larger than the first circumference S1). It is formed at each position displaced in the circumferential direction with respect to the part D1.
In the initial stage, the shaft member 30 is attached to the first notch D1 and disposed on the first circumference S1 (FIGS. 2 and 10), and the endless chain 2 is disposed on the shaft circumference 30 on the first circumference S1. When the endless chain 2 extends with use, the shaft member 30 is moved to the second notch D2 and arranged on the second circumference S2 (FIGS. 2 and 2). 11) The distance L1 between the adjacent shaft members 30 is changed from L1 to L2, so that the endless chain 2 can be loosened. Further, corresponding to the first notch portion D1 and the second notch portion D2, the notch groove E also has a first notch groove E1 and a second notch in which the bottom portions of the grooves are arranged on different circumferences. A notch groove E2 is provided.
[Another embodiment]
Other embodiments will be described below.

<1> The cutouts D having different cutout depths such as the first cutout portion D1 and the second cutout portion D2 are not limited to two types and may be formed in three or more types.
<2> The notch D formed in the side plate 9 may be formed in a bent key shape as shown in FIGS. 12 and 13 instead of the U-shaped notch shape.
<3> In order to prevent a plurality of shaft members 30 from coming off at the same time with respect to the notches D formed radially on the side plate 9, notch grooves E provided in the retaining member 18 are provided. Instead, a hole to which the shaft member 30 can be attached may be used, and these are collectively referred to as a locking portion. In this case, the retaining member 18 is not necessarily attached to the side plate 9 with the bolt 19 and the nut 20.
<4> When the retaining member 18 is attached to the side plate 9 with the bolt 19, the notch portion D through which the shaft member 30 passes is not limited to forming the notch direction radially on the side plate 9, but mutually It may be parallel.
<5> The plurality of cutout grooves E provided in the retaining member 18 are formed in a key shape because the cutout portion D formed in the side plate 9 and the cutout direction may be different. It is not limited to this, and may be formed in a linear shape different from the notch direction of the notch D.
<6> As shown in FIG. 12, the plate P is provided with an abutting portion 24 for preventing the shaft member 30 from coming out from the notch D without providing the notch groove E. May be.
<7> In addition to the member that prevents the plurality of shaft members 30 from coming off at the same time, the retaining member 18 includes, as shown in FIG. It may be fixed to the side plate 9.
<8> The bolt 19 for fixing the plate P to the side plate 9 is shorter than the shaft member 30. In addition to using the notch D and the notch groove E to fix the bolt 19 to the side plate 9, 12 and FIG. 13, a dedicated insertion hole may be provided in each of the side plate 9 and the plate P.

  In addition, as mentioned above, although the code | symbol was written in order to make contrast with drawing convenient, this invention is not limited to the structure of an accompanying drawing by this entry. In addition, it goes without saying that the present invention can be carried out in various modes without departing from the gist of the present invention.

DESCRIPTION OF SYMBOLS 1 Sludge scraping tool 2 Endless chain 3 Sprocket 9 Side plate 12 Link plate 13 Side edge part 14 Notch D Notch part 18 Retaining member E Notch groove (locking part)
30 shaft member

Claims (6)

  At a plurality of positions spaced apart in the circumferential direction on each of the pair of side plates, a notch is provided on the peripheral edge of the side plate, and an endless chain engaging shaft member extending between the pair of side plates is passed through the notch to the side plate. A sludge scraper sprocket that is detachably attached to the surface of the machine.   The sprocket of the sludge scraper according to claim 1, further comprising a retaining member that prevents the shaft member from slipping out of the notch.   The notch direction of each of the notch portions is formed radially from the rotation center of the side plate, and the retaining member is provided with a locking portion for locking each of the plurality of shaft members attached to the side plate. The sludge scraper sprocket according to claim 2, wherein the sprocket is formed as a collective retaining member that prevents the shaft member from slipping out of the notch.   The retaining member comprises a collective retaining member that prevents the shaft members attached to the side plate from coming out of the respective notches, and the collective retaining member is attached to the side plate via a bolt. The sprocket of the sludge scraper according to claim 2, which is detachably attached.   The collective retaining member has a notch groove that releases the locking state with the shaft member by locking the shaft member and moving along the surface of the side plate, and corresponds to each of the plurality of shaft members. The sprocket of the sludge scraper according to claim 4, wherein the notch direction of the notch portion and the notch groove for locking the shaft member are made different. Provide an endless chain with sludge scraping tools attached at intervals in the rotation direction,
At a plurality of positions spaced apart in the circumferential direction on each of the pair of side plates, a notch is provided on the peripheral edge of the side plate, and an endless chain engaging shaft member extending between the pair of side plates is passed through the notch to the side plate. A sprocket that is detachably attached to the surface of
The endless chain is connected to each of the link plates adjacent in the rotation direction so as to be relatively swingable in a posture along the radial direction of the sprocket,
Forming a notch with which the shaft member engages at a side edge of each of the link plates on the sprocket side;
A sludge scraping machine configured to rotate the sprocket with the shaft member engaged with the notch to drive and rotate the endless chain.

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