JP2018044279A - Dust collector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To promptly switch a posture of a rake of a dust collector from a posture with a bent claw member for scooping a dust to a posture with the overall rake tilted and the claw opened.SOLUTION: A dust collector 1 includes a posture changing mechanism 9 that changes a posture of a rake 5. The rake 5 includes a rake body 30 fitted rotatably on a bottom edge part of a multi-tiered expansion arm 6, and a claw member 40 fitted rotatably on the rake body 30. The posture changing mechanism 9 includes a rotation mechanism 9A for rotating the rake body 30, and a claw opening/closing mechanism 9B for carrying out an opening/closing operation of the claw member 40 relative to the rake body 30, in linkage with a rotary operation of the rake body. The claw opening/closing mechanism 9B includes a link member 100. A rake support member 64, the rake body 30, the claw member 40, and the link member 100 constitute a link mechanism of an overall degree of freedom as one, thus causing an operation to be carried out for opening/closing the claw member 40 relative to the rake body 30, in linkage with a change of posture of the rake body 30.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a dust remover that scoops up and removes dust captured by a screen bar disposed at a power generation water intake of a hydroelectric power plant.

  A screen bar is placed at the intake of water for power generation in a hydroelectric power plant, etc., in order to capture dust (dust) contained in the water flowing from there, and the dust captured by the screen bar is removed. A dust remover is used for this purpose. As dust removers, there are a fixed arrangement and a traveling type, both of which have a mechanism that raises and lowers the rake along the surface of the screen bar and scoops up and removes the dust trapped there. I have.

  In the patent document 1, the applicant of the present application performs a mechanism for extending and lowering the rake by extending and contracting an arm supporting the rake, and an operation for rotating the arm supporting the rake to approach and separate from the screen bar. And a dust remover having a mechanism for changing the rake posture to a posture capable of scooping up dust and a posture capable of discharging dust.

  In the dust remover of Patent Document 1, the rake includes a curved main body frame and a claw member (blade blade) that is rotatably attached to the tip of the main body frame. The mechanism for changing the attitude of the rake moves up and down the rotation prevention mechanism that restricts the rotation of the claw member relative to the main body frame, the link mechanism that is connected to the main body frame and the claw member, and the wire rope that is connected to the claw member. Provide mechanism. In the dust remover of Patent Document 1, an operation of changing the posture of the rake from a posture capable of scooping up dust to a posture capable of discharging dust is performed by pulling the wire rope upward. Specifically, when the wire rope is pulled upward, the claw member is first rotated until it becomes parallel to the main frame of the rake, and then the claw member is rotated relative to the main frame by the detent mechanism. In a state in which the body frame is regulated, the body frame and the claw member are integrally rotated.

JP-A-8-68037

  As described above, the dust remover of Patent Literature 1 includes a mechanism for changing the posture of the rake. When the rake is in a posture capable of discharging dust, a claw member provided at the tip of the rake body frame is It rotates until it becomes parallel to the main body frame, and changes from a posture in which the claw member is bent to a posture in which the claw member is opened. Therefore, the dust scooped up by the rake can be discharged smoothly.

  However, in the mechanism of Patent Document 1, only the claw member provided at the tip of the rake first rotates with respect to the main body frame of the rake, and then the main body frame and the claw member rotate together. Perform the action. Thus, if the rake posture is changed in two stages, the rake posture cannot be switched quickly. Therefore, it cannot be said that the dust scooped up by the rake can be quickly discharged to the bucket.

In addition, the mechanism for changing the posture of the rake in Patent Document 1 is complicated in structure because it is necessary to route the wire rope to the claw member provided at the tip of the rake. Furthermore, the amount of pulling up the wire rope for changing the rake posture is equivalent to the amount of rotation of the main body frame + the amount of rotation of the claw member relative to the main body frame, so the stroke of the drive cylinder for pulling up the wire rope is increased. There must be.

  In view of the above problems, the problem of the present invention is that the rake is tilted from the position where the claw member provided at the tip of the rake is bent to scoop up dust, and the entire rake is tilted and the claw is opened to remove dust. An object of the present invention is to propose a dust remover capable of promptly switching to a posture capable of releasing the dust.

  Another object of the present invention is to propose a dust remover having a simple structure and capable of switching the posture of the entire rake and the posture of the claw member provided at the tip of the rake.

  The present invention relates to a dust remover that raises and lowers a rake along a screen bar installed in an irrigation channel, and scoops up dust trapped on the screen bar by the rake, wherein the rake is attached to a lower end portion. A flexible multi-stage telescopic arm; an telescopic mechanism for extending and retracting the multi-stage telescopic arm; and an attitude changing mechanism for changing the attitude of the rake. The rake rotates at a lower end portion of the multi-stage telescopic arm. A rake body that is attachable to the rake body, and a claw member that is rotatably attached to the rake body. The posture changing mechanism is coupled to a rotation mechanism that rotates the rake body, and a rotation operation of the rake body. A claw opening / closing mechanism for opening / closing the claw member with respect to the rake body is provided.

  According to the present invention, the opening / closing operation of the claw member with respect to the rake body is performed in conjunction with the rotation of the rake body. In this way, since the operation of the claw member and the operation of the rake body can be performed in parallel based on the operation of the rake body, it is not necessary to perform the operation of the rake in two stages. Accordingly, the rake posture can be quickly switched.

  In the present invention, the rotation mechanism can change the posture of the rake main body to an upward posture capable of scooping up dust and a rising posture capable of discharging dust, The posture of the claw member is changed from a closed posture inclined with respect to the inner surface of the rake body to an open posture parallel to the inner surface in conjunction with an operation in which the posture is changed from the upward posture to the rising posture. By doing this, it is possible to quickly switch from a posture in which the claw member provided at the tip of the rake is bent to scoop up dust to a posture in which the entire rake rises and the claw can be opened to release dust. Therefore, the dust scooped up by the rake can be quickly released. Also, when dust is scooped up, the nail is bent so that dust can be scooped up efficiently from the screen bar.

  In the present invention, the rake body is rotatably supported by a rake support member attached to a lower end of the multistage telescopic arm, and the claw opening / closing mechanism is a link member that connects the rake support member and the claw member. It is desirable to provide. In this case, one end of the link member is connected to the rake support member at a position different from the rotation center of the rake body, and the other end of the link member is connected to the claw member at a position different from the rotation center of the claw member. It is desirable to be connected to. If it does in this way, a rake support member, a rake body, a claw member, and a link member will constitute a link mechanism of one degree of freedom as a whole. Therefore, by appropriately setting the distance between the nodes, the claw member can be opened and closed with respect to the rake body in conjunction with the change in the posture of the rake body. Therefore, the operation of rotating the rake body and the opening / closing operation of the claw member can be performed in parallel by a simple structure in which the members are connected by one link member.

In the present invention, it is desirable that the rotating mechanism includes a posture changing rope connected to the rake body and a lifting mechanism for moving the posture changing rope up and down. For example, a mechanism that moves a roller on which a posture changing rope is hung up and down by expansion and contraction of a cylinder can be used as the lifting mechanism. Thus, by using the rope, the rake posture can be easily changed by a simple mechanism.

  In the present invention, the telescopic mechanism includes a winding device that winds and unwinds a lifting rope hung on a rope sheave connected to a lower end portion of the multistage telescopic arm, and the winding device It is desirable that the posture changing rope is wound and fed out in synchronism with the winding and feeding of the working rope. In this way, when the multistage telescopic arm is expanded and contracted, the posture changing rope is simultaneously wound and fed out. Therefore, the multistage telescopic arm can be expanded and contracted without changing the rake posture.

  In the present invention, the rope sheave is preferably connected to the rake body via a link mechanism attached to a lower end of the multistage telescopic arm. If it does in this way, a rake will be connected with a rope for raising / lowering via a link mechanism. Accordingly, since the multistage telescopic arm can be moved so as to keep balance with the rake operation, the rake operation can be stabilized.

It is a side view which shows the condition which scoops up dust with the rake of the dust remover to which this invention is applied. It is a side view which shows the condition which discharge | releases dust from the rake of the dust remover of FIG. It is the top view which looked at the dust remover which abbreviated rake from the upper part. It is the front view which looked at the winding device from the front. It is the top view which looked at the mechanism provided in the lower end part of a rake | rake and a multistage type expansion-contraction arm from upper direction. It is operation | movement explanatory drawing of a rake.

  Hereinafter, embodiments of a dust remover to which the present invention is applied will be described with reference to the drawings.

(overall structure)
FIG. 1 is a side view showing a situation where dust is scooped up by a rake 5 of a dust remover 1 to which the present invention is applied. The dust remover 1 of this example is for scooping up and removing dust trapped by the screen bar 3 arranged at the intake port 2 of power generation water of a hydroelectric power plant by a rake 5. In this specification, three directions of XYZ are directions orthogonal to each other. The X direction indicates the horizontal direction, the Y direction indicates the front-rear direction, and the Z direction indicates the vertical direction. The + Y direction indicates the front, the −Y direction indicates the rear, the + Z direction indicates the upper side, and the −Z direction indicates the lower side. The + X direction indicates the right side when the dust remover 1 is viewed from the screen bar 3 side (when the dust remover 1 is viewed from the front), and the −X direction indicates the left side.

  As shown in FIG. 1, a gantry 10 in which steel materials are assembled is installed at a power generation water intake 2 of a hydroelectric power plant. A bucket 4 for collecting dust scooped up by the rake 5 is disposed in front of the gantry 10 (+ Y direction). The dust remover 1 of the present embodiment performs an operation of discharging the scooped up dust from the rake 5 and throwing it into the bucket 4 by changing the posture of the rake 5 on the bucket 4. The dust thrown into the bucket 4 from the rake 5 is carried away from the front of the gantry 10 and collected by a transport mechanism such as a conveyor (not shown).

FIG. 2 is a side view showing a situation in which dust is discharged from the rake 5 of the dust remover 1. FIG. 3 is a plan view of the dust remover 1 from which the rake is omitted as viewed from above. The dust remover 1 includes a telescopic multi-stage telescopic arm 6 supported by a gantry 10, an telescopic mechanism 7 for expanding and contracting the multi-stage telescopic arm 6, and a multi-stage telescopic arm 6 in the front-rear direction Y (with respect to the screen bar 3). An arm opening / closing mechanism 8 that opens and closes in the direction of approaching and leaving), and a scooping posture 5A (see FIGS. 2 and 6 (a)) that scoops up the posture of the rake 5 attached to the lower end of the multistage telescopic arm 6. It has a posture changing mechanism 9 that changes to a discharge posture 5B that discharges dust (see FIGS. 2 and 6B). As shown in FIG. 1, the multistage telescopic arm 6 can expand and contract between the most retracted retracted state 6 </ b> A and the most extended extended state 6 </ b> B (state indicated by a one-dot chain line in FIG. 1).

(Multistage telescopic arm)
As shown in FIGS. 1 and 2, the multistage telescopic arm 6 is a three-stage telescopic arm including a lower arm 61, a middle arm 62, and an upper arm 63. A rake support member 64 described later is attached to the lower end of the lower arm 61. The middle arm 62 can be pulled downward from the lower end opening of the upper arm 63, and the lower arm 61 can be pulled downward from the lower end opening of the middle arm 62. When the three arms 61 to 63 are pulled out, the middle arm 62 and the lower arm 61 pulled out by roller pairs 65, 66, and 67 attached to the upper and lower ends of the upper arm 63 and the lower end of the middle arm 62 are Guided. Therefore, the multistage telescopic arm 6 can perform a smooth arm expansion / contraction operation.

(Extension mechanism)
The telescopic mechanism 7 includes a rope sheave 71 attached to the lower end of the multistage telescopic arm 6, a lifting rope 72 hung on the rope sheave 71, and a rope winding provided with a winding device 73 that winds and unwinds the lifting rope 72. Take-off mechanism. FIG. 4 is a front view of the winding device 73 as viewed from the front (+ Y direction). The winding device 73 includes a winding drum 73a installed at the lower end of the gantry 10 and a motor 73c connected to the winding drum 73a via a speed reduction mechanism 73b. The winding device 73 rotates the winding drum 73 a by the driving force of the motor 73 c to wind and feed the lifting rope 72.

  The lifting rope 72 includes a right lifting rope 72R drawn upward from the right side (+ X direction) of the rope sheave 71 and a left lifting rope 72L drawn upward from the left side (−X direction) of the rope sheave 71. As shown in FIGS. 1 and 2, the right lifting rope 72 </ b> R and the left lifting rope 72 </ b> L extend upward along the multistage telescopic arm 6, and a pair of left and right rope sheaves rotatably attached to the upper arm 63. 74L, 74R is hung around the pair of left and right rope sheaves 75L, 75R that are routed backward (−Y direction) and rotatably attached to the frame provided at the upper end of the gantry 10 (−Z direction) ) To the winding drum 73a (see FIG. 4).

  The telescopic mechanism 7 is configured to evenly wind up both ends (the right lifting rope 72R and the left lifting rope 72L) of the single lifting rope 72 hung on the rope sheave 71 by the winding device 73. Has been. Therefore, the multistage telescopic arm 6 can be supported with an equal force at two locations separated in the horizontal direction X. Therefore, the expansion / contraction operation can be performed with the posture of the multistage expansion / contraction arm 6 stabilized.

(Arm opening / closing mechanism)
As shown in FIGS. 1 and 2, the arm opening / closing mechanism 8 includes a bracket 81 that protrudes rearward (−Y direction) from the upper end position of the upper arm 63, and an arm support arm that supports the upper arm 63 via the bracket 81. 82, a connecting rod 83 connected to the arm support arm 82, and a cylinder 85 for driving the connecting rod 83. The rear end of the bracket 81 and the front end of the arm support arm 82 are rotatably supported by a fulcrum pin 11 provided at the upper end of the gantry 10. The fulcrum pin 11 is provided at the front end of the upper frame 12 provided so as to protrude forward (+ Y direction) at the upper end of the gantry 10. Accordingly, the multistage telescopic arm 6 is supported by the gantry 10 through the bracket 81 so as to be pivotable in the front-rear direction Y about the fulcrum pin 11. In the extended state 6B (see FIG. 1) in which the multistage telescopic arm 6 is extended, the multistage telescopic arm 6 pivots downward about its fulcrum pin 11 by its own weight. Thereby, the state in which the rake 5 is pressed against the screen bar 3 is formed.

  The arm support arm 82 extends rearward (−Y direction) from the fulcrum pin 11. The bracket 81 and the arm support arm 82 are fixed or coupled so as to rotate integrally around the fulcrum pin 11. The connecting rod 83 is disposed above the arm support arm 82 and extends in the front-rear direction Y along the arm support arm 82. The connecting rod 83 restricts the upward rotation of the arm support arm 82. The rear end of the connecting rod 83 is connected to the operating rod 84 of the cylinder 85. On the other hand, the front end of the connecting rod 83 is rotatably connected to a connecting portion 86 that protrudes upward from the approximate center in the front-rear direction Y of the arm support arm 82.

  As shown in FIG. 1, when the operating rod 84 of the cylinder 85 protrudes upward, the connecting rod 83 is in a substantially horizontal posture. Since the multistage telescopic arm 6 is installed in a posture with the lower end directed obliquely forward, a force of turning backward (−Y direction) is exerted by its own weight. In the retracted state 6A (see FIGS. 1 and 2) in which the elevating rope 72 is wound and the multistage telescopic arm 6 is contracted, the rear end portion of the arm support arm 82 is connected to the connecting rod 83. It stops in a swiveled posture until it comes into contact with the lower side.

  When the multistage telescopic arm 6 is extended, the cylinder 85 is driven to retract the operating rod 84 downward (−Z direction). As a result, the rear end of the connecting rod 83 is lowered, and the rear end portion of the arm support arm 82 is pushed downward by the connecting rod 83. As a result, the multistage telescopic arm 6 turns forward (+ Y direction) and the multistage telescopic arm 6 tilts in the direction in which the rake 5 is lifted. If the winding device 73 is driven in this state and the lifting rope 72 is fed out, the multistage telescopic arm 6 can be extended along the screen bar 3 (see FIG. 1). Therefore, the rake 5 can be moved to the vicinity of the lower end of the screen bar 3.

  When the operating rod 84 of the cylinder 85 is protruded in the extended state 6B in which the multistage telescopic arm 6 is extended to the maximum, the multistage telescopic arm 6 initially turns due to its own weight, but when the rake 5 hits the screen bar 3, the multistage telescopic arm 6 turns. The arm 6 does not rotate any further. Therefore, the multistage telescopic arm 6 stops in a state where there is a gap between the rear end portion of the arm support arm 82 and the connecting rod 83. That is, since the multistage telescopic arm 6 can press the rake 5 at the lower end thereof against the screen bar 3 by its own weight, it is not necessary to separately provide a mechanism for pressing the rake 5 against the screen bar 3. Further, since the cylinder 85 and the multistage telescopic arm 6 are connected via the connecting rod 83, it is not necessary to adjust the cylinder 85 each time according to the change in the tilt posture of the multistage telescopic arm. If the rake 5 is pressed against the screen bar 3 by its own weight and the winding device 73 is driven to wind the lifting rope 72, the multistage telescopic arm 6 contracts, so that the rake 5 is brought into contact with the screen bar 3 by its own weight. The rake 5 is pulled up along the screen bar 3 while maintaining the contact posture. Thereby, the dust captured by the screen bar 3 is scooped up by the rake 5.

  The arm opening / closing mechanism 8 restricts the rear end portion of the arm support arm 82 from turning upward (+ Z direction) by the connecting rod 83, but the rear end portion of the arm support arm 82 is downward (−Z direction). There are no restrictions on turning. Therefore, while the rake 5 is pulled up along the screen bar 3, the multistage telescopic arm 6 can turn forward (+ Y direction). For this reason, when the rake 5 pulled up along the screen bar 3 hits an obstacle, the multistage telescopic arm 6 is moved so as to escape the rake 5 in the direction over the obstacle even if the cylinder 85 does not operate. Can be swiveled. Therefore, although the rake 5 can be pushed up against the screen bar 3 by its own weight and the dust can be scooped up, if the rake 5 hits an obstacle, the multistage telescopic arm 6 cannot be forced through the rake 5. It can avoid applying force.

(Rope sheave support structure on which the lifting rope is hung)
FIG. 5 is a plan view of the rake 5 and the mechanism provided at the lower end portion of the multistage telescopic arm 6 as viewed from above (enlarged view of the region A in FIG. 1 as viewed from above). FIG. 6 is a diagram for explaining the operation of the rake 5. A side view of the mechanism provided at the lower end portion of the rake 5 and the multistage telescopic arm 6 as seen from the right side (enlarged view of the region A in FIG. ). 6A shows a state in which the rake 5 is in the scooping posture 5A, and FIG. 6B shows a state in which the rake 5 is in the discharge posture 5B.

  The attachment structure to the lower arm 61 of the rope sheave 71 on which the lifting rope 72 is hung is as follows. As shown in FIGS. 5 and 6, a bracket 76 is disposed in front of the lower end of the lower arm 61 (+ Y direction). The bracket 76 holds the rope sheave 71 in a rotatable state. A rake support member 64 is attached to the lower end of the lower arm 61. The rake support member 64 protrudes below the rake 5. The bracket 76 is connected to the rake support member 64 via the link mechanism 20 attached to the rake support member 64.

  As shown in FIG. 5, the link mechanism 20 is attached to the right side link mechanism 20 </ b> R attached to the right side (+ X direction) side surface of the rake support member 64 and the left side (−X direction) side surface of the rake support member 64. A left link mechanism 20L is provided. Since the right link mechanism 20R and the left link mechanism 20L are configured symmetrically about the lower arm 61, the configuration of the right link mechanism 20R will be described as a representative, and the description of the left link mechanism 20L will be omitted. As shown in FIG. 6, the right link mechanism 20 </ b> R includes a first link member 21 and a second link member 22. The first link member 21 is rotatably attached to the side surface of the rake support member 64 around the support shaft 23. The first link member 21 includes a front arm portion 21 a that extends forward (+ Y direction) with respect to the support shaft 23 and a rear arm portion 21 b that extends rearward (−Y direction) with respect to the support shaft 23. The front arm portion 21 a and the rear arm portion 21 b are connected to a shape bent at the position of the support shaft 23. The second link member 22 is linear. One end of the second link member 22 is rotatably connected to the tip of the rear arm portion 21 b of the first link member 21, and the other end is connected to the rake 5.

  The bracket 76 is rotatably attached to the connecting shaft 24 that is passed between the front arm portions 21 a of the pair of left and right first link members 21. In the link mechanism 20, the second link member 22 is connected to the rake 5 as described above. As will be described later, in the link mechanism 20, the second link member 22 moves in the front-rear direction Y as the posture of the rake 5 changes, and accordingly, the first link member 21 rotates around the support shaft 23. . As a result, since the connecting shaft 24 moves in the vertical direction Z, the bracket 76 moves in the vertical direction Z along the lower end of the lower arm 61. That is, the rope sheave 71 moves relative to the lower arm 61 by a predetermined amount in the vertical direction Z with the change in the posture of the rake 5.

(rake)
As shown in FIG. 6, the rake 5 includes a rake body 30 having a curved inner surface 31, and a claw member 40 that is rotatably attached to the tip of the rake body 30. The posture of the rake 5 changes to a scooping posture 5A in which the inner surface 31 of the rake body 30 is directed upward (+ Z direction), and a discharge posture 5B in which the inner surface 31 of the rake body 30 is directed rearward (−Y direction). . When the rake 5 is in the scooping posture 5A, the claw member 40 is disposed at the rear end (the end in the −Y direction) of the rake body 30. Further, in the scooping posture 5 </ b> A, the claw member 40 is inclined in a direction to rise obliquely from the inner surface 31 of the rake body 30. Therefore, when the rake 5 in the scooping posture 5A is pulled up along the screen bar 3, the dust trapped on the screen bar 3 by the claw member 40 is scooped up. Hereinafter, the posture of the rake body 30 when the rake 5 is in the scooping posture 5A is referred to as an upward posture 30A, and the posture of the claw member 40 in this state is referred to as a closed posture 40A (see FIG. 6A). Further, the posture of the rake body 30 in the state where the rake 5 is in the discharge posture 5B is set to the rising posture 30B, and the claw member 40 at this time is set to the open posture 40B (FIG. 6).
(See (b)).

  As shown in FIG. 5, the rake body 30 includes comb teeth 32a and 32b arranged in the horizontal direction X at regular intervals, and three connecting members 33a, 33b, and 33c that connect the comb teeth 32a and 32b. Prepare. The three connecting members 33a, 33b, and 33c extend in parallel to the horizontal direction X. The comb teeth 32a are plate-like members that are thicker than the diameters of the connecting members 33a, 33b, and 33c, and the connecting members 33a, 33b, and 33c penetrate the comb teeth 32a. On the other hand, the comb teeth 33b are linear members and are fixed to the surfaces of the connecting members 33a, 33b, and 33c. As shown in FIGS. 6A and 6B, the connecting member 33a is disposed at the base end (the end opposite to the claw member 40) of the rake body 30, and the connecting member 33c is attached to the claw member 40. At the end of the side.

  The claw member 40 is rotatably attached to the connecting member 33c of the rake body 30. As shown in FIG. 5, the claw member 40 includes a plurality of scraping claws 41 arranged in the horizontal direction X at regular intervals, a connecting member 42 that connects the plurality of scraping claws 41, and a scraping from the connecting member 42. A plurality of projecting portions 43 projecting to the opposite side of the claw 41 are provided. The claw member 40 is supported so as to be rotatable around the rotation axis L <b> 1 passing through the center of the connecting member 33 c extending in the horizontal direction X via the protrusion 43.

(Attitude change mechanism)
As shown in FIG. 6A, when scooping up dust from the screen bar 3, the rake 5 directs the inner surface 31 of the rake body 30 upward (+ Z direction) and the tip of the scraping claw 41 of the claw member 40. In a scooping posture 5A. In the scooping posture 5 </ b> A, the claw member 40 is in a closed posture 40 </ b> A in which the scraping claw 41 is inclined at a predetermined angle with respect to the inner surface 31 of the rake body 30. On the other hand, when discharging dust from the rake 5 to the bucket 4, the rake 5 turns the inner surface 31 of the rake body 30 rearward (in the −Y direction) and points the tip of the scraping claw 41 of the claw member 40 obliquely downward. The release posture is 5B. In the release posture 5 </ b> B, the claw member 40 is in an open posture 40 </ b> B in which the scraping claw 41 is parallel to the inner surface 31 of the rake body 30.

  The posture changing mechanism 9 is a mechanism that changes the posture of the rake 5 between the scooping posture 5A and the discharging posture 5B. The posture changing mechanism 9 includes a rotation mechanism 9A that rotates the rake body 30 around a rotation axis L2 extending in the horizontal direction X, and a claw opening / closing mechanism 9B that rotates the claw member 40 relative to the rake body 30. The claw opening / closing mechanism 9B rotates the claw member 40 around the rotation axis L1 described above in conjunction with the rotation operation of the rake body 30 by the rotation mechanism 9A.

  As shown in FIGS. 6 (a) and 6 (b), the rake main body 30 includes arm portions 35 formed on the center two of the four comb teeth 32a. The arm portion 35 protrudes from the comb tooth 32 a to the side opposite to the inner surface 31 of the rake body 30. The distal end of the arm portion 35 is connected to a rake support member 64 attached to the lower end of the lower arm 61 via a fulcrum pin 36. Therefore, the rake main body 30 is supported so as to be rotatable about the rotation axis L <b> 2 passing through the center of the fulcrum pin 36.

(Rotating mechanism)
The rotation mechanism 9 </ b> A includes a posture changing rope 91 connected to the rake body 30 and a lifting mechanism 93 that moves the posture changing rope 91 in the vertical direction Z. As shown in FIGS. 6A and 6B, the base end portion of the rake body 30 is provided with a rope connecting portion 34 that protrudes on the opposite side to the inner surface 31 of the rake body 30. The rope connecting portion 34 is fixed to the connecting members 33 a and 33 b and is located on both sides of the lower arm 61 in the horizontal direction X. A hook member 92 is attached to the tip of the rope connecting portion 34. The posture changing rope 91 is connected to the rope connecting portion 34 via a hook member 92. The second link member 22 of the link mechanism 20 described above is connected to the rake body 30 via a rope connecting portion 34. That is, the end of the second link member 22 is connected to the rope connecting portion 34 via the fulcrum pin 37.

  As shown in FIG. 2, the elevating mechanism 93 includes a roller support arm 94 rotatably attached to a fulcrum pin 14 provided on the elevating mechanism support frame 13 provided at the upper end of the gantry 10, and the roller support arm 94. A cylinder 96 that pivots in the vertical direction and a lifting rope sheave 97 attached to the tip of the roller support arm 94 are provided. The posture changing rope 91 is drawn upward (+ Z direction) from the hook member 92 attached to the rake 5, and is hung on the first guide sheave 98 attached to the middle arm 62 along the multistage telescopic arm 6. It is routed upward.

  A roller support frame 15 that supports the second guide sheave 99 in a rotatable state is provided at the center of the front end of the gantry 10. The attitude changing rope 91 is hung on the second guide sheave 99 and changed in the rear direction (−Y direction), and then hung on the elevating rope sheave 97 and changed in the lower direction (−Z direction). It is routed to 73a. The winding device 73 synchronizes the three ropes of the lifting rope 72 (the left lifting rope 72L and the right lifting rope 72R) and the posture changing rope 91 for expanding and contracting the multistage telescopic arm 6 described above. And is configured to be wound up.

  The rotating mechanism 9A drives the cylinder 96 and causes the operating rod 95 connected to the roller support arm 94 to protrude upward, thereby raising the lifting rope sheave 97 to the rising position 97B. Further, by pulling the operating rod 95, the lifting rope sheave 97 is lowered to the lowered position 97A. By moving the lifting rope sheave 97 up and down, the posture changing rope 91 moves up and down. Thereby, the rake body 30 rotates about the rotation axis L2, and changes to an upward posture 30A and a rising posture 30B. When the lifting rope sheave 97 is lowered to the lowered position 97 </ b> A, the posture changing rope 91 is loosened. Therefore, the rake body 30 is rotated by the weight of the multistage telescopic arm 6 to which the rake body 30 is attached and the link mechanism 20. Turn downward about L2. Thereby, the rake body 30 is in the upward posture 30A, and the rake 5 is in the scooping posture 5A. When the lifting rope sheave 97 is raised to the ascending position 97B against the dead weight of the multistage telescopic arm 6, the rake body 30 turns rearward about the rotation axis L2, so that the rake body 30 assumes a rising posture 30B. Becomes a discharge posture 5B.

(Nail opening / closing mechanism)
The claw opening / closing mechanism 9 </ b> B includes a link member 100 that connects the claw member 40 and the rake support member 64. A fulcrum pin 101 is attached to the rake support member 64 further on the tip side than the fulcrum pin 36 to which the rake body 30 is coupled. One end of the link member 100 is connected to the fulcrum pin 101. On the other hand, the other end of the link member 100 is connected to the protrusion 43 of the claw member 40. More specifically, the projecting portion 43 of the claw member 40 is formed with an arm portion 44 that projects in a direction different from the scraping claw 41, and the other end of the link member 100 is connected to the distal end of the arm portion 44 via a fulcrum pin 102. Are connected.

That is, one end of the link member 100 is connected to the rake support member 64 by the fulcrum pin 101 provided at a position different from the fulcrum pin 36 that is the rotation center of the rake body 30. On the other hand, the other end of the link member 100 is connected to the claw member 40 by a fulcrum pin 102 provided at a position different from the connection member 33 c that is the rotation center of the claw member 40. By providing such a link member 100, the rake body 30, the claw member 40, the link member 100, and the rake support member 64 constitute a link mechanism with one degree of freedom as a whole. This link mechanism operates so that the rotation locus of the connecting member 33c centering on the fulcrum pin 36 (that is, the rotation center of the claw member 40) and the rotation locus of the fulcrum pin 102 centering on the fulcrum pin 101 intersect. To do. For this reason, when the rake body 30 rotates around the fulcrum pin 36, the claw member 40 is rotated relative to the rake body 30 at the same time.

  As described above, the claw opening / closing mechanism 9B of this embodiment is a link mechanism including the rake body 30, the claw member 40, the link member 100, and the rake support member 64. In this link mechanism, by appropriately setting the length of the link member 100 and the positions of the fulcrum pins 101 and 102 connected to both ends thereof, the rake body 30 is in an upward posture 30A with the inner surface 31 facing upward. Sometimes the claw member 40 rises obliquely from the inner surface 31 to a closed posture 40A, and when the rake body 30 assumes a rising posture 30B with the inner surface 31 facing rearward, the claw member 40 extends in parallel along the inner surface 31. It can be configured to be 40B.

(Function and effect of this embodiment)
As described above, the dust remover 1 of this embodiment has the posture changing mechanism 9 that changes the posture of the rake 5, and the rake 5 is rotatably attached to the lower end portion of the multistage telescopic arm 6. 30 and a claw member 40 rotatably attached to the rake body 30. The posture changing mechanism 9 includes a rotation mechanism 9A that rotates the rake body 30 and a claw opening / closing mechanism 9B that opens and closes the claw member 40 with respect to the rake body 30 in conjunction with the rotation operation of the rake body. In this way, if the structure in which the operation of the claw member 40 and the operation of the rake body 30 are performed in parallel based on the operation of the rake body 30, the operation of rotating the rake 5 and opening the claw member 40 is 2. There is no need to do it in stages. Therefore, the posture of the rake 5 can be quickly switched.

  The rotation mechanism 9A of the present embodiment can change the posture of the rake body 30 into an upward posture 30A that can scoop up dust and a rising posture 30B that can discharge dust. Then, the claw opening / closing mechanism 9B is in a closed posture in which the posture of the claw member 40 is inclined with respect to the inner surface 31 of the rake main body 30 in conjunction with the operation of changing the posture of the rake main body 30 from the upward posture 30A to the rising posture 30B. The position is changed from 40A to an open posture 40B parallel to the inner surface 31. If it does in this way, it changes from the attitude | position which bends the nail | claw member 40 provided in the front-end | tip of the rake 5 and hold | maintains dust to the attitude | position which the whole rake 5 stands up and can open | release the nail | claw member 40 and can discharge | release dust quickly. Can do. Therefore, the dust scooped up by the rake 5 can be quickly released. Further, when scooping up dust, the claw member 40 is bent so that dust can be scooped up efficiently from the screen bar 3.

  The rake body 30 of this embodiment is rotatably supported by a rake support member 64 attached to the lower end of the multistage telescopic arm 6, and the claw opening / closing mechanism 9 </ b> B is a link member that connects the rake support member 64 and the claw member 40. 100. One end of the link member 100 is connected to the rake support member 64 at a position different from the fulcrum pin 36 that is the rotation center of the rake body 30, and the other end of the link member 100 is a connection member that is the rotation center of the claw member 40. It is connected to the claw member 40 at a position different from 33c. Thereby, since the rake support member 64, the rake body 30, the claw member 40, and the link member 100 constitute a link mechanism with one degree of freedom as a whole, by appropriately setting the distance between the nodes of the link mechanism, The opening / closing operation of the claw member 40 with respect to the rake body 30 can be performed in conjunction with the change in the posture of the rake body 30. Therefore, with a simple structure in which the members are connected by one link member 100, the operation of rotating the rake body 30 and the opening / closing operation of the claw member 40 can be performed in parallel. Therefore, with a simple structure, it is possible to perform an operation of quickly releasing the dust in the rake 5.

In this embodiment, the rotation mechanism 9A that rotates the rake main body 30 includes a posture changing rope 91 connected to the rake main body 30 and a lifting mechanism 93 that moves the posture changing rope 91 up and down. The elevating mechanism 93 is a mechanism for moving the elevating rope sheave 97 on which the posture changing rope 91 is hung up and down by the expansion and contraction of the cylinder 96. Therefore, the posture changing rope 91 can be moved up and down with a simple structure. Further, the take-up device 73 that takes up and feeds the lifting rope 72 is used to wind and feed the posture changing rope 91. As a result, the posture changing rope 91 and the lifting rope 72 can be wound up synchronously. Therefore, the multistage telescopic arm 6 can be expanded and contracted without changing the posture of the rake 5.

  According to this embodiment, the bracket 76 that rotatably holds the rope sheave 71 on which the lifting rope 72 is hung is connected to the rake body 30 via the link mechanism 20 that is attached to the lower end of the multistage telescopic arm 6. Thus, since the rake 5 is connected with the raising / lowering rope 72 via the link mechanism 20, the multistage type | mold expansion-contraction arm 6 can be moved so that operation | movement and the balance of the rake 5 may be maintained. Therefore, the operation of the rake 5 can be stabilized.

DESCRIPTION OF SYMBOLS 1 ... Dust remover, 2 ... Intake port, 3 ... Screen bar, 4 ... Bucket, 5 ... Rake, 5A ... Scooping posture, 5B ... Discharge posture, 6 ... Multistage telescopic arm, 6A ... Retracted state, 6B ... Extended state , 7 ... telescopic mechanism, 8 ... arm opening / closing mechanism, 9 ... posture changing mechanism, 9A ... rotating mechanism, 9B ... claw opening / closing mechanism, 10 ... mount, 11 ... fulcrum pin, 12 ... upper frame, 13 ... lifting mechanism support frame, 14 ... fulcrum pin, 15 ... roller support frame, 20 ... link mechanism, 20R ... right link mechanism, 20L ... left link mechanism, 21 ... first link member, 21a ... front arm, 21b ... rear arm, 22 ... Second link member, 23 ... support shaft, 24 ... connection shaft, 30 ... rake body, 30A ... upward posture, 30B ... rise posture, 31 ... inner surface, 32a, 32b ... comb teeth, 33a, 33b, 33c ... continuous 34, rope connecting portion, 35 ... arm portion, 36 ... fulcrum pin, 37 ... fulcrum pin, 40 ... claw member, 40A ... closed posture, 40B ... open posture, 41 ... scraping claw, 42 ... connecting member, 43 ... Projection, 44 ... Arm, 60 ... Link mechanism, 61 ... Lower arm, 62 ... Middle arm, 63 ... Upper arm, 64 ... Rake support member, 65, 66, 67 ... Roller pair, 71 ... Rope sheave, 72 ... Lifting rope, 72R ... Right lifting rope, 72L ... Left lifting rope, 73 ... Winding device, 73a ... Winding drum, 73b ... Deceleration mechanism, 73c ... Motor, 74L, 74R ... Rope sheave, 75L, 75R ... Rope sheave , 76 ... Bracket, 81 ... Bracket, 82 ... Arm support arm, 83 ... Connecting rod, 84 ... Actuating rod, 85 ... Cylinder, 86 ... Connecting portion, 91 ... B 92 ... Hook member, 93 ... Lifting mechanism, 94 ... Roller support arm, 95 ... Actuating rod, 96 ... Cylinder, 97 ... Lifting rope sheave, 97A ... Lowering position, 97B ... Lifting position, 98 ... First guide sheave, 99 ... second guide sheave, 100 ... link member, 101, 102 ... fulcrum pin, L1 ... rotation axis of claw member, L2 ... rotation axis of rake body, X ... horizontal direction, Y ... front / rear direction, Z ... up / down direction

Claims (7)

In the dust remover that raises and lowers the rake along the screen bar installed in the irrigation channel, and scoops up the dust trapped on the screen bar by the rake,
A retractable multistage telescopic arm with the rake attached to the lower end portion;
An expansion and contraction mechanism for expanding and contracting the multistage telescopic arm;
A posture changing mechanism for changing the posture of the rake,
The rake includes a rake body that is rotatably attached to a lower end portion of the multistage telescopic arm, and a claw member that is rotatably attached to the rake body.
The posture changing mechanism is
A dust remover comprising: a rotation mechanism that rotates the rake body; and a claw opening / closing mechanism that opens and closes the claw member with respect to the rake body in conjunction with the rotation operation of the rake body. The dust remover according to claim 1,
The rotation mechanism can change the posture of the rake body to an upward posture capable of scooping up dust and a standing posture capable of discharging dust,
The claw opening / closing mechanism moves the claw member from the closed position inclined to the inner surface of the rake body in conjunction with the operation of changing the attitude of the rake body from the upward position to the rising position. The dust remover is characterized in that it is changed to an open posture parallel to the. The dust remover according to claim 2,
The rake body is rotatably supported by a rake support member attached to the lower end of the multistage telescopic arm,
The dust removing machine, wherein the claw opening / closing mechanism includes a link member that connects the rake support member and the claw member. The dust remover according to claim 3,
One end of the link member is connected to the rake support member at a position different from the rotation center of the rake body, and the other end of the link member is connected to the claw member at a position different from the rotation center of the claw member. A dust remover characterized by that. In the dust remover according to any one of claims 1 to 4,
The rotation mechanism includes a posture changing rope connected to the rake body and a lifting mechanism for moving the posture changing rope up and down. The dust remover according to claim 5,
The telescopic mechanism includes a winding device that winds and unwinds a lifting rope hung on a rope sheave connected to a lower end portion of the multistage telescopic arm,
The wind-up device winds and unwinds the posture changing rope in synchronization with winding and unwinding of the lifting rope. The dust remover according to claim 6,
The rope sheave is connected to the rake body through a link mechanism attached to the lower end of the multistage telescopic arm.

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