JP5503418B2 - Sludge scraping device chain device - Google Patents

Description

  The present invention relates to a chain device for a sludge scraping device formed by connecting segments having notches.

As the structure of the sludge scraping device chain, conventionally, the roller shown in FIG. 9 and the barrel part 41 of the bushed chain mesh with the tooth part of the sprocket wheel to transmit power to the chain C1 in either the forward or reverse direction. The structure was known.
In the above configuration, there is a possibility that the tooth shape pitch of the sprocket and the pitch of the chain do not match with each other due to elongation of the chain due to pulling of each chain pitch or elongation due to wear, resulting in tooth skipping.
Therefore, in the notch chain developed by the Finnish company in Finland, a pin attached to a sprocket wheel (not shown) so that the pitch can be adjusted is engaged with the concave notch portion 42 of the notch chain to rotate the chain (see FIG. 10).
However, the conventional notch chain has a problem that it can rotate only in one direction.

JP 2002-3214

  The present invention has been made in view of the above circumstances, and the problem is that the notch portion is formed on the bottom surface of the protruding piece portion that extends outward at the bottom surface of the pair of side links of the segment, thereby making contact with the pin. Can be expanded in the width direction, increasing the engagement force, and providing the wings to restrict the movement of the wings from above to prevent the chain from lifting from the sprocket. It is to provide a chain device for the device.

In order to solve the above problem, the invention of claim 1
A segment of a synthetic resin chain that meshes with a sprocket wheel of a sludge scraping device forms a notch portion that can lock a pin of the sprocket wheel on the bottom surface, and the chain is driven by the pin according to the rotation of the sprocket wheel. In a chain device that can move in the direction of travel,
The chain segment has a pair of left and right side links,
Notch portions are formed on the bottom surfaces of the protruding piece portions that extend outward at the bottom surfaces of the pair of side links, respectively.
A pair of left and right wings that extend outward from the projecting piece are formed above the notches of each side link at positions overlapping the notches in the front-rear direction. It is characterized by being.
In the invention of claim 2,
The notch portion is disposed on the bottom surface of the segment at a position deviated from the center between the pivot attachment positions of the segment and the segment adjacent to the front and rear.

In the present invention, the notch portions are formed on the bottom surfaces of the protruding piece portions extending outward at the bottom surfaces of the pair of side links, so that the area in contact with the pins can be expanded in the width direction, and the engagement force can be increased. it can.
Furthermore, by providing a pair of left and right wings that cross the side link extension direction and extend outward from the protruding piece, the movement of the tip side of the wing is restricted at a position away from the sprocket. The chain can be prevented from lifting from the sprocket.

It is a top view of the segment of the chain which abbreviate | omitted the wing | blade part. It is the same side view. It is a side view of the segment of the chain which has a wing | blade part. It is the same top view. 3A is a cross-sectional view taken along line AA in FIG. 3, FIG. 3B is a cross-sectional view taken along line BB in FIG. 3, FIG. 3C is a cross-sectional view taken along line CC in FIG. Figure, (A) The side view of the state which mounted | wore with the scraping board, (b) is the same top view which provided the scraping board attaching part. It is a side view explaining the meshing state of a gear type sprocket wheel and a chain. It is a top view of the chain explaining the state which the tooth | gear part meshed | engaged. It is a top view of the conventional roller chain. (A) is a side view of a conventional fin chain (notch chain), and (b) is a bottom view thereof.

Hereinafter, an embodiment of a chain device used in the sludge scraping device of the present invention will be described with reference to the drawings.
The sludge scraping device chain device is also opposed to a pair of left and right endless chains and a plurality of driven wheels provided facing the side walls of the settling tank in order to circulate the pair of chains synchronously. A pair of drive sprocket wheels provided and a plurality of scraping plates (flights) F spanned between the pair of chains at regular intervals so that both endless chains take the same track. It consists of a publicly known structure wound around each wheel.

The chain is configured by connecting a number of segments 1 having the same shape.
1 and 2 show the segment 1 in which the wing portion 25 is omitted, and FIG. 3 shows the segment 1 of this embodiment in which the wing portion 25 is provided.
This segment 1 has a pair of left and right side links 2 and 2 facing each other so that one side is narrow and the other is wide.

  In the case of the present embodiment, the pair of side links 2 and 2 includes a narrow portion 21 extending in parallel at a narrow interval to a substantially central position, and an expansion that gradually widens from the end of the narrow portion 21. The portion 22 and a wide portion 23 that extends in parallel while maintaining a wide space at the end of the widened portion 22.

In the narrow portion 21, the side links 2 and 2 are connected by the cylindrical first connecting portion 3.
And the 1st hole 3a penetrated between the hollow of the 1st connection part 3 and the side links 2 and 2 of the narrow part 21 is formed, and it is a 1st bearing formation hole.

Next, the wide portion 23 is formed with a boss-like second connecting portion 4 that is integrally formed with each side link 2 and protrudes outward.
The second connecting portion 4 and the wide portion 23 pass through them in series and are formed with a second hole portion 4a having a hole having the same diameter as the first hole portion 3a. It is a formation hole.

The 2nd hole 4a formed in each side link 2 and 2 is arrange | positioned on the same axis line.
Therefore, by aligning the first hole 3a of the other segment in a coaxial line between the second holes 4a of one segment 1, the first bearing formation hole and the second bearing formation hole are aligned. A bearing hole for the connecting shaft 5 to be described later is formed.

The outer dimension W1 of the width of the narrow part 21 (direction orthogonal to the chain traveling direction) is set slightly shorter than the inner dimension W2 between the side links 2 and 2 facing each other.
Therefore, the narrow portion 21 of the other segment 1 is inserted into the gap 24 between the side links of the wide portion 23 of the one segment 1, and the second segment 4 of the other segment 1 is inserted between the second holes 4 a of the one segment 1. The first hole 3a is aligned, both ends thereof are fixed to the second connecting portion 4 side through the connecting shaft 5, and the segments 1 and 1 are connected to each other so as to be bent.

For example, the connecting shaft 5 may be a column having a head, and a well-known configuration may be used such that a retaining ring is fitted and fixed to the tip that has come out of the second connecting portion 4.
Here, although the connecting shaft 5 is made of a synthetic resin material, a metal detector (not shown) provided at an arbitrary place if a metal core rod 5b is incorporated as a core material as will be described later. You can also monitor the movement of the chain.

By connecting the segments 1 and 1 as described above, each segment 1 extends from the first connecting portion 3 to the first connecting portion 3 of another segment connected to the second connecting portion 4. That is, the gap S including the widened portion 22 is set from the middle position of the narrow portion 21 (see FIG. 8).
The gap S has a lateral width of at least an inner dimension W3 between the side links 2 and 2 of the narrow portion 21 and the tooth portion 16 of the sprocket wheel 15 is engaged with the gap S. Can do.

Next, the widened portion 22 is formed with a thick protruding piece portion 7 that protrudes outward below each side link 2. The protruding piece portion 7 has a bottom surface that is wide and extends in a series. A concave groove-shaped notch 8 is formed.
Thus, the notch portion 8 having a predetermined width can be formed while securing the gap portion S, and the contact area between the notch portion 8 and the pin 18 of the sprocket wheel 17 for the notch chain can be increased.
Further, as shown in FIG. 2, the protruding piece 7 extends integrally to the boss-like second connecting portion 4 and is integrally formed.

Therefore, when the sprocket wheel 17 is a pin wheel, the chain can be driven by engaging the pin with the notch portion 8.
In the figure, 7 a is a triangular guide piece that extends substantially horizontally from the middle position of the narrow portion 21 and continues to the protruding piece 7.

The chain segment 1 and the chain device shown in the drawings after FIG. 3 show the structure of this embodiment in which the wing portion 25 and the restriction plate 31 are provided in the segment 1.
However, the configuration excluding the wing portion 25 and the restriction plate 31 is the same as that of the segment 1 in FIGS.
That is, a blade extending outwardly intersecting (substantially orthogonal in the illustrated example) with respect to the extending direction of the side link 2 at a position overlapping the notch portion 8 of each side link 2 in the front-rear direction of the notch portion 8. Part 25.

The wing portion 25 protrudes longer than the left and right lateral widths excluding the wing portion 25 of the segment 1 (see FIG. 5).
The shape of the wing portion 25 is not particularly limited, but in the illustrated example, the front and rear sides are formed in a tapered shape so that the resistance is reduced, and slightly upward toward the narrow portion 21. It is inclined to become.

  In order to prevent the chain segment 1 from being lifted, the sprocket wheel 17 is provided in the radial direction of the wing portion 25 and the sprocket wheel 17 on both the left and right outer sides of the sprocket wheel 17 as shown in FIGS. A pair of restricting plates 31 and 31 are provided so as to sandwich the sprocket wheel 17 from the left and right at positions separated by a predetermined separation distance L.

  In the illustrated example, the regulation plate 31 has a ceiling wall 31a having an arc-shaped surface corresponding to the rotation trajectory of the sprocket wheel 17, and a side wall 31b that hangs down along the edge of the ceiling wall 31a that is outside the sprocket wheel 17. It consists of a plate with an angled cross section.

  Further, as shown in FIG. 9, the restriction plate 31 is fixed to a base for bearing the sprocket wheel 17 and extends in the lateral direction, and rises from the lateral support member 32 on the left and right sides of the sprocket wheel 17. It is fixed to a pair of left and right vertical support members 33, 33 that extend in close proximity, and is disposed at a position that is spaced apart from the top of the sprocket wheel 17 and that overlaps only the left and right wings 25 of the chain segment 1.

  The restriction plate 31 has a gap S2 that does not collide with the wing portion 25 when the notch 8 of the chain segment 1 pulled by the sprocket wheel 17 is normally locked to the pin 18 of the sprocket wheel 17. ing.

  The separation distance L of the regulation plate 31 is determined when the notch 8 of the chain segment 1 is about to lift from the pin 18 of the sprocket wheel 17 (when a part is locked before it completely comes off). It is preferable that the wings 25 are separated from each other by a distance that can be pressed against the wings 25 to suppress lifting (see FIGS. 10 and 12).

In the example of illustration, the wing | blade part 25 consists of the plate shape formed in series on the protrusion piece part 7, and is arrange | positioned in the position which overlaps with the whole front-back direction of the said notch part 8, but in this invention, The position may overlap with a part of the notch portion 8 in the front-rear direction.
Or you may arrange | position in the vicinity position adjacent to the said notch part 8. FIG.

Moreover, although the case where the wing | blade part 25 was integrally formed with the protrusion piece part 7 was illustrated, you may provide separately in the position spaced apart.
The wing portion 25 is provided at a midway position in the vertical direction of the side link 2, but may be an upper end position or any other position.

  In the illustrated example of the chain drive device 40, a gear-type sprocket wheel 15 is fixed to the outside of the drive shaft 40A, and a notch chain sprocket wheel 17 is fixed to the inside of the drive shaft 40A. The chain of the dual type according to the invention can be used by selecting and sprinkling one of the sprocket wheels 15 or 17 (see FIG. 9).

In the present invention, the material and shape of the chain segment are not limited to the above embodiment.
Further, the core material of the connecting shaft may be a single bar or may be divided into a plurality of parts.
In addition, it goes without saying that various design changes can be made without departing from the scope of the present invention.

DESCRIPTION OF SYMBOLS 1 Segment 2 Side link 3 1st connection part 3a 1st hole part 4 2nd connection part 4a 2nd hole part 5 Connection shaft 5b Metal core rod 7 Projection piece part 7a Guide piece part 8 Notch part 8a One of notch parts Side corner 8b Corner on the other side of the notch 13 Preventing means 15 Sprocket wheel 17 Sprocket wheel for notch chain 21 Narrow part 22 Wide part 23 Wide part 25 Wing part 31 Restriction plate 31a Top wall 31b Side wall S Gap part F scratch Parquet F 'scraping plate support

Claims (2)

A segment of a synthetic resin chain that meshes with a sprocket wheel of a sludge scraping device forms a notch portion that can lock a pin of the sprocket wheel on the bottom surface, and the chain is driven by the pin according to the rotation of the sprocket wheel. In a chain device that can move in the direction of travel,
The chain segment has a pair of left and right side links,
Notch portions are formed on the bottom surfaces of the protruding piece portions that extend outward at the bottom surfaces of the pair of side links , respectively .
A pair of left and right wings that extend outward from the projecting piece are formed above the notches of each side link at positions overlapping the notches in the front-rear direction. chain apparatus of the sludge raking device, characterized in that it is.   2. The sludge scraping device according to claim 1, wherein the notch portion is disposed on a bottom surface of the segment at a position deviated from a center between pivot positions of the segment and a segment adjacent to the front and rear. Chain device.

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