JP2006097428A - Dust remover - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a dust remover capable of reducing the abrasion of an arm roller, at the same time, preventing the horizontal vibration of the rake to maintain the smooth engagement of a rake-tooth with a dust removal screen and improving durability. <P>SOLUTION: A pair of rake arms 55 is put on a pair of rake chains 40 with a pivot 50 as the center in one end section of them in a movable manner. A rake 60 is put on across the space between the other ends of a pair of rake arms 55 and, at the same time, an arm roller 56 is rotatably put on the other end sections of the rake arms 55. An arm roller guide rail 26 movably guiding the arm roller 56 of the rake arms 55 and a chain roller guide rail 27 movably guiding a chain roller 45 of a pair of rake chains 40 are respectively installed along a moveable orbit of the rake chains 40. A flange 47 preventing the horizontal vibration of the rake 60 is formed in one end section of the chain roller 45 by abutting on an edge section 27a of the chain roller guide rail 27. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  More particularly, the present invention relates to a dust remover, and more specifically, a rake mounted between a pair of endless rake chains is moved along a dust removal screen installed in a water channel, and captured by the dust removal screen. The present invention relates to a dust remover that scrapes up and removes the generated dust.

In this type of dust remover, the rake chain stops when an excessive load (load greater than a predetermined value) acts on the rake, for example, when the rake is caught by excessive dust trapped on the dust removal screen. A bug may occur.
In order to prevent such a problem, a rake swing type dust remover is known.
In a rake swing type dust remover, one end of a pair of rake arms is attached to a pair of rake chains so as to be swingable about a support shaft, and the rake straddles between the other ends of the pair of rake arms. Is installed.
Also, in the rake swing type dust remover, in order to move and guide the rake along the dust removing screen, an arm roller is provided on the rake arm, and an arm roller guide rail is provided on the fixed frame side. (For example, refer to Patent Document 1).
Japanese Utility Model Publication No. 60-2267

By the way, in the conventional rake swing type dust remover described above, the arm roller of the rake arm rotates and moves the guide rail for the arm roller so that the rake moves and guides, so that the load when the rake moves is the arm. It acts on the contact portion between the roller and the arm roller guide rail so that the arm roller is easily worn.
In addition, when a lateral load is applied to the rake, the rake will sway, which may prevent the rake teeth and the dust screen from being kept in smooth engagement, which may damage the rake teeth and dust screen. .

  In view of the above problems, an object of the present invention is to reduce the wear of the arm roller and prevent the rake from being shaken to maintain the smooth engagement between the rake teeth and the dust removing screen, thereby improving the durability. It is to provide a dust remover that can.

In order to achieve the above object, a dust remover according to claim 1 of the present invention is such that a rake mounted between a pair of endless rake chains moves along a dust removal screen installed in a water channel. A dust remover that scrapes and removes the dust trapped on the dust removal screen,
A pair of rake arms are attached to the pair of rake chains so as to be swingable around a support shaft at one end thereof,
A rake is mounted across the other ends of the pair of rake arms, and an arm roller is rotatably mounted on the other ends of the pair of rake arms,
An arm roller guide rail that moves and guides the arm roller of the rake arm and a chain roller guide rail that moves and guides the chain roller of the pair of rake chains are installed along the movement path of the rake chain, respectively.
One end of the chain roller is formed with a flange that abuts against an edge of the chain roller guide rail to prevent lateral rake shake.

In the above configuration, the rake is moved along the dust removing screen installed in the water channel by the pair of rake chains, so that the dust trapped on the dust removing screen is scraped up and removed.
When the rake is caught by excessive dust trapped by the dust removal screen, the rake rotates in the retreat direction (direction to remove from excessive dust) using the support shaft of the pair of rake arms as a fulcrum, which causes excessive rake Pass through. Thereafter, the rake returns to its normal posture by its own weight. This eliminates the problem that the rake chain stops unexpectedly.
When the rake is moved by the pair of rake chains, the arm roller of the rake arm is guided to move along the guide rail for the arm roller, and the chain roller of the pair of rake chains is guided to move along the guide rail for the chain roller. . As a result, the load during the movement of the rake acts in a distributed manner on the contact portion between the arm roller and the guide rail for the arm roller and the contact portion between the chain roller and the guide rail for the chain roller. Damage and wear of the arm roller can be reduced.
Further, when a lateral load is applied to the rake, the flange at one end of the chain roller comes into contact with the edge of the guide rail for the chain roller, thereby preventing the rake from being laterally shaken. As a result, smooth engagement between the rake teeth of the rake and the dust removing screen is maintained.

A dust remover according to claim 2 is the dust remover according to claim 1,
The outer diameter dimension of the chain roller of the rake chain is set to be larger than the width dimension of the chain link.

  In the above configuration, the chain roller whose outer diameter is larger than the width of the chain link can stably receive the load when the rake moves, and can reduce wear of the chain roller, improving durability. Great effect.

A dust remover according to claim 3 is the dust remover according to claim 1 or 2,
A buffer body made of an elastic body is provided on the outer periphery of the arm roller of the rake arm.

In the above configuration, when the rake is caught by excessive dust trapped by the dust removal screen, the rake rotates in the retraction direction using the support shaft of the pair of rake arms as a fulcrum, and then rotates to a normal posture by its own weight. When returning, the arm roller of the rake arm collides with the arm roller guide rail.
At this time, the impact force and the collision noise against the arm roller guide rail can be reduced by the buffer body on the outer periphery of the arm roller.

A dust remover according to claim 4 is the dust remover according to any one of claims 1 to 3,
A chain tensioning mechanism having a tension plate that is longer than at least the interval between adjacent chain rollers of the rake chain and has a tension plate that presses the adjacent chain roller outward is disposed inside the movement path of the rake chain. And

In the above-described configuration, the rake chain is pressed to the rake chain by pressing the adjacent chain roller outward by a tension plate longer than at least the distance between adjacent chain rollers of the rake chain (desirably longer than the distance between the three adjacent chain rollers). A desired tension can be applied, and problems caused by loosening of the rake chain can be prevented.
Moreover, because the tension is applied to the rake chain by a tension plate that is longer than at least the distance between adjacent chain rollers of the rake chain, the tension plate displacement stroke is smaller than that of a structure that applies tension to the rake chain by a tension sprocket. Can be small.
For this reason, it becomes easy to secure a space for arranging the chain tensioning mechanism having the tensioning plate inside the movement locus of the rake chain.
As a result, it is not necessary to increase the width of the fixed frame of the dust remover by the amount of the tension sprocket as compared with the case where the tension sprocket is disposed outside the movement path of the rake chain.

According to the present invention, the load during movement of the rake can be distributed and received at the contact portion between the arm roller and the guide rail for the arm roller and the contact portion between the chain roller of the rake chain and the guide rail for the chain roller. Therefore, damage to the rake chain and wear of the arm roller can be reduced.
In addition, when a lateral load is applied to the rake, the rake can be prevented from being shaken by the flange of the chain roller, and the rake teeth of the rake and the dust removing screen can be kept in a smooth meshing state.
As described above, the rake chain and arm roller wear are reduced, and the rake teeth and dust screen are kept in smooth engagement to prevent damage to the rake teeth and dust screen. Can be improved.

  Next, the best mode for carrying out the present invention will be described with reference to examples.

  FIG. 1 is a schematic explanatory view showing a dust remover according to an embodiment of the present invention. FIG. 2 is a perspective view showing the relationship between the rake chain, the rake arm, and the rake. FIG. 3 is a plan view showing the rake chain, the rake arm, and the rake partially broken. FIG. 4 is a plan view showing the relationship among the dust removing screen, rake, rake arm, arm roller, chain roller, arm roller guide rail and chain roller guide rail. FIG. 5 is a side view showing the relationship of the rake, rake arm, arm roller, and arm roller guide rail. FIG. 6 is an enlarged side view showing the chain tension mechanism.

As shown in FIG. 1, a dust removal screen 10 that captures dust such as wood pieces, paper pieces, resin pieces, cloth pieces, etc. of treated water flowing through the water passage 1 is installed in the water passage (mainly a sewer). The dust removal screen 10 is inclined at a predetermined angle with the upper end directed downstream with respect to the flow of treated water.
As is well known, the dust removing screen 10 is configured by connecting a number of dust removing bars 11 in the vertical direction arranged at predetermined intervals in the width direction of the water channel by a horizontal connecting member (see FIG. 4).
The dust removing screen 10 is assembled to the water channel 1 by appropriate attachment means separately from the dust remover, or is integrally assembled to the fixed frame 20 of the dust remover which will be described in detail below.

As shown in FIG. 1, the dust remover installed in the water channel 1 adjacent to the upstream side of the dust removal screen 10 is a pair of endless rake chains 40 arranged at predetermined intervals in the width direction of the water channel. And a plurality of rakes 60 that are mounted across the pair of rake chains 40 and scrape up and remove the dust trapped by the dust removing screen 10.
That is, the pair of rake chains 40 are stretched between the drive sprocket 30 using the motor 22 as a drive source and the driven sprocket 31 so as to be substantially parallel to the dust removing screen 10.
The drive sprocket 30 and the driven sprocket 31 are rotatably mounted on the upper and lower portions of the fixed frame (main body frame) 20 of the dust remover, and the upper drive sprocket 30 is mounted on the motor bracket 21 on the upper portion of the fixed frame 20. The output shaft of the drive motor 22 is connected by power transmission means 23 such as a chain mechanism or a belt mechanism.

As shown in FIGS. 1 and 4, the fixed frame 20 has a substantially lower half of the position-side straight portion, the lower U-turn portion, and the opposite-side straight portion of the rake chain 40 located on the dust removing screen 10 side. A guide rail body 25 is installed along the outer periphery.
As shown in FIG. 4, the guide rail body 25 includes an arm roller guide rail 26 that moves and guides the arm roller 56 of the rake arm 55 and a chain roller that moves and guides the chain roller 45 of the pair of rake chains 40. A guide rail 27 is provided integrally.

As shown in FIGS. 2 and 3, the rake chain 40 is configured by connecting inner and outer chain links 41, 42 and a chain roller 45, and the outer diameter of the chain roller 45 is that of the chain links 41, 42. It is set to be appropriately larger than the width dimension, whereby the strength of the chain roller 45 is increased.
As shown in FIGS. 2 to 4, one end of the chain roller 45 a located at both ends of the chain link 42 a to which the support shaft 50 of the rake arm 55 is assembled is connected to the edge 27 a of the chain roller guide rail 27. A flange 47 that abuts and prevents lateral displacement of the rake 60 is formed.

As shown in FIGS. 1 to 4, the pair of rake chains 40 includes a pair of rake arms 55 at one end thereof at a plurality of locations (four locations in this embodiment) spaced apart in the chain direction. In FIG. 1, the shaft is mounted so as to be swingable about the support shaft 50. A rake 60 is mounted between each other end of each pair of rake arms 55. In the rake 60, a large number of rake teeth 62 corresponding to the large number of dust removing bars 11 of the dust removing screen 10 are integrally formed (see FIG. 4).
In this embodiment, an arm roller 56 is rotatably mounted on the other end of the pair of rake arms 55, and a buffer body 57 made of an elastic body is provided on the outer periphery of the arm roller 56.

  As shown in FIG. 1 and FIG. 6, an inner guide rail 28 is disposed along the inner side of the fixed frame 20 in an endless rake chain 40 on a straight line portion opposite to the dust removing screen 10. .

As shown in FIGS. 1 and 6, the upper side portion is removed from the middle portion of the inner guide rail 28, and a chain tension mechanism 70 having a tension plate 71 is disposed in a state of facing the removal portion. Yes. The chain tension mechanism 70 includes a tension arm 76, a slide shaft 72, and a tension plate 71.
The tension arm 76 is supported at one end of the tension arm 76 so as to be rotatable about the arm shaft 76a and extends in an upwardly inclined manner. A weight suspension body 77 is provided at the tip of the tension arm 76. A plurality of weights 78 having a predetermined weight are detachably installed on the weight suspension body 77 in a stacked shape.
A pinion 75 is provided on the arm shaft 76 a of the tension arm 76.

As shown in FIG. 6, the slide shaft 72 is supported by a bearing body 73 so as to be slidable in a direction orthogonal to the linear portion on the opposite side of the dust removing screen 10 of the rake chain 40. A rack 74 that meshes with the pinion 75 of the tension arm 76 is formed in the axial direction of the outer periphery of the slide shaft 72.
As shown in FIG. 6, the tension plate 71 is fixed to one end of the slide shaft 72 and is longer than the interval between at least the adjacent chain rollers 45 of the rake chain 40 on the inner side of the movement locus of the rake chain 40. In this embodiment, the distance between the adjacent three chain rollers 45 is longer. Thus, the tension plate 71 is configured to always come into pressure contact with at least two adjacent chain rollers 45.

  That is, in the chain tension mechanism 70, the tension plate 71 is pushed out together with the slide shaft 72 through the rack 74 and the pinion 75 by the rotational force of the tension arm 76 based on the weight of the weight 78, whereby the adjacent chain roller 45. Is pressed outward to apply a required tension based on the weight of the weight 78 to the rake chain 40.

The dust remover according to this embodiment is configured as described above.
Therefore, when the motor 22 operates, the drive sprocket 30 rotates counterclockwise toward FIG. 1, thereby driving the pair of rake chains 40.
By driving the pair of rake chains 40, the rake 60 is moved along the dust removing screen 10 installed in the water channel, so that the dust captured by the dust removing screen 10 is scraped up. Then, the dust scraped up by the rake 60 is discharged from the discharge port 80 and then received and discharged by the discharge conveyor 81.

  When the rake 60 is moved by the pair of rake chains 40, the arm roller 56 of the rake arm 55 is guided along the arm roller guide rail 26, and the chain roller 45 of the pair of rake chains 40 is guided by the chain roller guide rail. 27 is guided to move along. As a result, the load when the rake 60 moves is applied to the contact portion between the arm roller 56 of the rake arm 55 and the guide rail 26 for the arm roller, and the contact portion between the chain roller 45 of the rake chain 40 and the guide rail 27 for the chain roller. It acts in a distributed manner, thereby reducing damage to the rake chain 40 and wear of the arm roller 56.

Further, in this embodiment, the chain roller 45 having the outer diameter dimension larger than the width dimension of the chain link 41 can stably receive the load when the rake 60 is moved, and reduce wear of the chain roller 45. It is effective in improving durability.
Further, when a lateral load is applied to the rake 60, the flange 47 at one end of the chain roller 45a abuts against the edge 27a of the chain roller guide rail 27 to prevent the rake 60 from sideways. As a result, the smooth engagement between the rake teeth 62 of the rake 60 and the dust removal bars 11 of the dust removal screen 10 is maintained (see FIG. 4).

  Further, when the rake 60 is moved by the pair of rake chains 40, when an excessive load (load of a predetermined value or more) acts on the rake 60, for example, excessive foreign matter exists on the bottom surface of the water channel, or When excessive dust is trapped on the dust removing screen 10 and the rake 60 is caught by foreign matter or dust, the rake 60 retreats with the support shaft 50 of the pair of rake arms 55 as a fulcrum as shown by a two-dot chain line in FIG. It rotates in the direction (direction away from foreign matter and dust), and thus the rake 60 passes the foreign matter and dust. Thereafter, the rake 60 returns to a normal posture by its own weight. This eliminates the problem that the rake chain 40 stops unexpectedly.

  Further, in this embodiment, as shown in FIGS. 2 and 3, a buffer body 57 made of an elastic body is provided on the outer periphery of the rake arm 55 of the rake arm 55. Therefore, as described above, when the rake 60 rotates in the retracting direction with the support shaft 50 of the pair of rake arms 55 as a fulcrum, the arm roller 56 of the rake arm 55 moves when returning to the normal posture by its own weight. When the arm roller guide rail 26 collides with the arm roller guide rail 26, the shock absorber 57 on the outer periphery of the rake arm 55 can alleviate the impact force and the collision sound against the arm roller guide rail 26.

  Further, in this embodiment, as shown in FIG. 6, the inner side of the movement path of the rake chain 40 is longer than at least the interval between the adjacent chain rollers 45 of the rake chain 40 and presses the adjacent chain rollers 45 outward. A chain tension mechanism 70 having a tension plate 71 is disposed. Then, the adjacent chain roller 45 is pressed outward by the tension plate 71 longer than the distance between the adjacent chain rollers 45 of the rake chain 40 (in this embodiment, longer than the distance between the three adjacent chain rollers 45). Thus, a desired tension can be applied to the rake chain 40, and problems due to the looseness of the rake chain 40 can be prevented.

Moreover, the tension is applied to the rake chain 40 by the tension plate 71 that is longer than at least the distance between the adjacent chain rollers 45 of the rake chain 40. Compared to the structure in which the tension is applied to the rake chain 40 by the tension sprocket. The displacement stroke of the plate 71 can be reduced.
For this reason, it becomes easy to secure a space for arranging the chain tension mechanism 70 having the tension plate 71 on the inner side of the movement locus of the rake chain 40.
As a result, it is not necessary to increase the width dimension of the fixed frame of the dust remover as much as the tension sprocket is disposed, compared to the case where the tension sprocket is disposed outside the movement trajectory of the rake chain 40.

In addition, this invention is not limited to the said Example.
For example, as shown in FIG. 7, a chain roller guide rail 127 extending in the longitudinal direction of the guide rail body 25 in the center in the width direction on one side surface thereof is projected to move the chain roller 45 of the rake chain 40. On the other hand, the arm roller 56 of the rake arm 55 may be guided to move by using the width direction front end portion of one side surface of the guide rail body 25 as the arm roller guide rail 26. However, even in this case, the flange 47 at one end of the chain roller 45a abuts against the edge 127a of the chain roller guide rail 127 to prevent the rake 60 from sideways.

Further, in the chain tension mechanism 70, the rotational force of the tension arm 76 based on the weight of the weight 78 is transmitted to the slide shaft 72 by the rack 74 and the pinion 75, and the tension plate 71 is pushed out in the tension direction of the rake chain 40. However, any configuration may be used as long as the rotational force of the tension arm 76 can be transmitted to the slide shaft 72.
For example, as shown in FIG. 8, in the chain tensioning mechanism 70, the cam lever 175 provided on the axis of the arm shaft 76 a of the tension arm 76, and the slide shaft, You may comprise by the engaging part 174 formed on the axis | shaft of 72. FIG.
Also, a weight installation portion 177 in which a plurality of weights 78 having a predetermined weight are detachably installed in a stacked shape may be formed on the upper surface near the tip of the tension arm 76.
Further, the present invention can be implemented even if the tension plate 71 is configured to be pushed out in the tension direction of the rake chain 40 using a fluid pressure cylinder, a spring mechanism, or the like.

It is a schematic explanatory drawing which shows the dust remover which concerns on the Example of this invention. It is a perspective view which similarly shows the relationship between a rake chain, a rake arm, and a rake. FIG. 3 is a plan view showing the relationship between the rake chain, the rake arm, and the rake in a partially broken manner. It is a top view which similarly shows the relationship between a dust removal screen, a rake, a rake arm, an arm roller, a chain roller, a guide rail for an arm roller, and a guide rail for a chain roller. FIG. 5 is a side view showing the relationship among the rake, rake arm, and arm roller arm roller guide rail. It is a side view which expands and similarly shows a chain tension mechanism. It is explanatory drawing which shows the embodiment of the guide rail body of this invention. It is explanatory drawing which shows the embodiment of the chain tension mechanism of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Dust removal screen 25 Guide rail body 26 Guide rail for arm rollers 27 Guide rail for chain rollers 30 Drive sprocket 31 Driven sprocket 40 Rake chain 41, 42 Chain link 45 Chain roller 47 Flange 55 Rake arm 56 Arm roller 60 Rake 70 Chain tension mechanism 71 Tension plate

Claims (4)

Dust removal that scrapes and removes dust trapped on the dust removal screen by moving the rake mounted between a pair of endless rake chains along the dust removal screen installed in the waterway Machine,
A pair of rake arms are attached to the pair of rake chains so as to be swingable around a support shaft at one end thereof,
A rake is mounted across the other ends of the pair of rake arms, and an arm roller is rotatably mounted on the other ends of the pair of rake arms,
An arm roller guide rail that moves and guides the arm roller of the rake arm and a chain roller guide rail that moves and guides the chain roller of the pair of rake chains are installed along the movement path of the rake chain, respectively.
A dust remover characterized in that a flange is formed at one end of the chain roller so as to abut against an edge of the chain roller guide rail to prevent lateral shaking of the rake. The dust remover according to claim 1,
A dust remover characterized in that the outer diameter of the chain roller of the rake chain is set larger than the width of the chain link. The dust remover according to claim 1 or 2,
A dust remover characterized in that a buffer body made of an elastic body is provided on the outer periphery of the arm roller of the rake arm. It is a dust remover as described in any one of Claims 1-3,
A chain tensioning mechanism having a tension plate that is longer than at least the interval between adjacent chain rollers of the rake chain and has a tension plate that presses the adjacent chain roller outward is disposed inside the movement path of the rake chain. Dust remover.

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