JP3920622B2 - Reciprocating scum rammer - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a reciprocating scum squeezer that squeezes scum floating on a water surface such as a diversion basin or a settling basin in one direction, and in particular, prevents occurrence of a failure due to foreign matter entering a clutch holding portion of a traveling carriage. The present invention relates to a reciprocating scum scraper.
[0002]
[Prior art]
A conventional reciprocating scum scraper includes a track provided on the surface of a waterway, a settling basin, etc., a traveling carriage with a scraper that can travel along the track, a slide bar that reciprocates on the track, Driving means for moving the traveling carriage in one direction along the track by engaging a piece provided at intervals on the slide bar with a clutch provided on the traveling carriage and capable of changing the direction of engagement, and both ends of the track Moving direction reversing means for changing the engagement direction of the clutch provided in the traveling carriage, scraper moving means provided in the traveling carriage for positioning the lower end of the scraper below the water surface during forward movement and positioning the lower end of the scraper on the water surface during backward movement, It is equipped with. In addition, a water spray for blowing the scum to the scum collecting device is disposed on the water conduit in parallel with the reciprocating scum scraper.
[0003]
According to the reciprocating scum scraper, the traveling carriage moves the traveling carriage in one direction along the track by driving means that engages a clutch provided on the sliding carriage and a piece provided on the slide bar at intervals. The forward movement and the backward movement are repeated. By the way, since the clutch and this clutch holding portion provided on the traveling carriage are exposed to the outside, foreign matter enters through the opening of the inspection port or the like, and the foreign matter is caught in the clutch, or the foreign matter is generated by the power of water spray. May be blown off the surface of the water and foreign matter may enter the clutch holding portion from below and bite into the clutch.
[0004]
For this reason, as shown in FIG. 12, the foreign substance K may be caught between the clutch holding part 40 and the clutch C and become in a horizontal posture, and the slide bar 15 reciprocatingly moves on the track. A situation occurs in which the provided piece 17 cannot engage with the clutch C and the traveling carriage cannot be moved in one direction along the track.
[0005]
Such a state where the traveling carriage cannot move and stops is expected to occur in a central part where a trader cannot easily approach in a culvert space or a sedimentation basin. Therefore, there is a problem that it is difficult for the administrator to remove foreign substances and to pull out or pull back the traveling carriage itself into the opening.
[0006]
[Problems to be solved by the invention]
The present invention has been made based on these points, and an object of the present invention is to provide a reciprocating scum scraper that prevents occurrence of a failure due to foreign matter entering the clutch holding portion of a traveling carriage. There is.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, a reciprocating scum rammer according to claim 1 of the present invention comprises a track provided on the water surface of a water conduit, a settling basin, etc., and a traveling carriage with a scraper capable of traveling along the track. A sliding bar that reciprocates on the track, and a piece provided at intervals on the slide bar are engaged with a clutch that is provided on the traveling cart and can change the direction of engagement, and the traveling cart is moved in one direction along the track. Driving means for moving the slide bar, moving direction reversing means for changing the engagement direction of the clutch provided at both ends of the slide bar, and a backward movement provided on the traveling carriage with the lower end of the scraper positioned below the water surface In a reciprocating scum scraper equipped with a scraper moving means that sometimes positions the lower end of the scraper on the water surface, the clutch holding portion of the traveling carriage is brought into contact with the side surface of the slide bar and the clutch. It is characterized in that attaching the cover body for covering a gap between the pitch holder.
[0008]
Further, the reciprocating scum scraper according to claim 2 is provided with a track provided on a water surface such as a waterway or a settling basin, a traveling carriage with a scraper that can travel along the track, and a reciprocating motion on the track. And a driving means for moving the traveling carriage in one direction along the track by engaging a piece provided at intervals on the slide bar with a clutch provided on the traveling carriage and capable of changing an engagement direction. A moving direction reversing means provided at both ends of the slide bar to change the direction of engagement of the clutch, and a traveling carriage provided on the traveling carriage, the lower end of the scraper is located below the water surface and the lower end of the scraper is placed above the water surface during the backward movement. In the reciprocating scum scraper equipped with a scraper moving means positioned at a position, a dropping hole is provided outside the rolling range of the clutch in the clutch holding portion of the traveling carriage. Is shall.
[0009]
The reciprocating scum scraper according to claim 3 is provided with a track provided on a water surface such as a diversion basin or a settling basin, a traveling carriage with a scraper capable of traveling along the track, and a reciprocating motion on the track. And a driving means for moving the traveling carriage in one direction along the track by engaging a piece provided at intervals on the slide bar with a clutch provided on the traveling carriage and capable of changing an engagement direction. A moving direction reversing means provided at both ends of the slide bar to change the direction of engagement of the clutch, and a traveling carriage provided on the traveling carriage, the lower end of the scraper is located below the water surface and the lower end of the scraper is placed above the water surface during the backward movement. A reciprocating scum scraper equipped with a scraper moving means positioned on the side of the slide bar and a gap between the clutch holding portion and the clutch holding portion of the traveling carriage. It is attached to the cover member and is characterized in that a hole darken outside rolling range of the clutch a clutch holding portion of the traveling carriage.
[0010]
The reciprocating scum scraper according to claim 4 is characterized in that in the reciprocating scum scraper according to claim 2 or 3, an encircling portion extending downward is formed around the dropping hole. Is.
[0011]
[Action]
The reciprocating scum scraper according to claim 1 of the present invention travels a traveling carriage with a scraper that can travel along a track provided on the water surface such as a diversion basin or a sedimentation basin, and scrapes the floating scum. A slide bar that reciprocates on a track, and a drive that moves the traveling cart in one direction along the track by engaging a piece provided at intervals on the slide bar with a clutch provided on the traveling cart. Means. Further, both ends of the slide bar are provided with moving direction reversing means for changing the engagement direction of the clutch, and the traveling carriage is moved back by positioning the lower end of the scraper below the water surface in cooperation with an opposing stopper. Scraper moving means for positioning the lower end of the scraper on the water surface when moving is provided. And the cover body which contacts the side surface of a slide bar and covers the clearance gap between this and the clutch holding part is attached to the clutch holding part of this traveling carriage.
[0012]
During operation of the reciprocating scum scraper, foreign matter tends to enter the clutch attached to the traveling carriage and the clutch holding portion from above. However, since the cover body is attached so as to contact the side surface of the slide bar and cover the gap between the cover body and the clutch holding portion, entry of foreign matter into the clutch holding portion is prevented. The cover body and the slide bar are slidably brought into contact with each other. As a result, the foreign material does not enter the clutch holding portion of the traveling carriage, the clutch continues to function normally, and is securely engaged with the piece provided on the slide bar, and the traveling carriage is always moved in one direction along the track. It can be moved reliably.
[0013]
According to the reciprocating scum scraper according to claim 2, the dropping hole is provided outside the rolling range of the clutch in the clutch holding portion of the traveling carriage. Thereby, when a foreign material enters the clutch holding portion of the traveling carriage from the upper space, it can be dropped downward from the drop hole provided outside the rolling range of the clutch. Therefore, foreign matter does not get caught in the clutch, the clutch continues to function normally, is reliably engaged with the piece provided on the slide bar, and the traveling carriage is always reliably moved in one direction along the track. Can do.
[0014]
According to a third aspect of the present invention, the reciprocating scum scraper includes a cover body that abuts the side surface of the slide bar on the clutch holding portion of the traveling carriage and covers the gap between the slide holding portion and the clutch holding portion. A drop hole is provided outside the moving range. The cover body prevents foreign matter from entering the clutch holding portion, and even if foreign matter enters the clutch holding portion from the space above the clutch holding portion, the cover body is provided with a drop hole provided outside the rolling range of the clutch. Foreign matter falls downward.
[0015]
Thus, foreign matter can be prevented from entering the clutch holding portion, and even if foreign matter enters the clutch, it is eliminated, so there is no possibility of biting into the clutch.
[0016]
Further, since the reciprocating scum scraper according to claim 4 is formed with a surrounding portion extending downward around the dropping hole, even if foreign matter tries to enter the clutch holding portion from the obliquely downward direction by the force of water spray. , The enclosure guards to prevent intrusion. Thereby, there is no possibility that a foreign substance will enter the clutch holding portion and bite into the clutch.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of a reciprocating scum scraper according to the present invention will be described with reference to FIGS. FIGS. 1 and 2 are perspective views showing a reciprocating scum squeezer 100 and a traveling carriage of the present invention, FIG. 3 is a plan view of a water conduit, and FIGS. 4 to 7 are operational views of a traveling carriage with a scraper. is there.
[0018]
The reciprocating scum scraper 100 of the present invention is applied to a water conduit 1 and a sedimentation basin. For example, two U-shaped steels 2 and 3 are opposed to the water surface W of the water conduit 1. The arranged track R is erected. A traveling carriage 10 is mounted on the track R, and a scraper 5 is attached to the traveling carriage 10. Further, as shown in FIG. 3, a water spray 50 is installed in the water conduit 1 in parallel with the track R, whereby the scum S floating on the water surface W is blown to the scum skimmer side.
[0019]
The traveling carriage 10 is slidably supported by guides 6 provided at four locations on the front and rear sides of the frame 7 on the lower edges 2A and 3A of the two structural steels 2 and 3 that are the track R. A clutch holding portion 40 is formed on the frame body 7. The clutch holding portion 40 is formed by the frame body 7 and two vertical plates 7A and 7B erected on the frame body 7, and a support shaft 7C is installed between the two vertical plates 7A and 7B. A substantially half-moon-shaped clutch C is engaged with the support shaft 7C through the circular arc hole C0, and is attached so that the tilt direction can be switched between the left tilt position and the right tilt position and can be maintained. ing.
[0020]
As shown in FIGS. 1, 4, and 5, the scraper 5 is pivotally supported by a support portion 31 attached to the lower surface of the frame body 7, and is scraped by the scraper moving means 20. The lower portion of the scraper 5 is held in a vertical posture in which it is below the water surface and in an inclined posture in which it is lifted up on the water surface. Further, the scraper moving means 20 includes an operating bar 21 disposed on both sides of the frame body 7 and capable of moving back and forth in the extending direction of the track, and a stop adjustment 23 connected to the operating bar 21. The stop adjustment 23 is engaged with the trilobal hole 25 </ b> A of the locking device 25.
[0021]
As shown in FIG. 4, when the traveling carriage 10 moves to the end side and the operating rod 21 contacts the stopper 32 fixed to the track R and is pushed into the frame body 7, the stop adjustment 23 is The scraper 5 is engaged with the groove 25B of the trilobal hole 25A in the locking device 25 and the scraper 5 is lifted upward from the water surface W, and this state is maintained. As shown in FIG. 5, when the traveling carriage 10 moves to the start end side, when the operating rod 21 comes into contact with the stopper 33 fixed to the track R and is pushed into the frame body 7, the stop adjustment 23 is The scraper 5 is lowered below the water surface W by being engaged with the groove 25C of the trilobal hole 25A in the locking device 25, and this state is maintained.
[0022]
As shown in FIGS. 1 and 2, the drive mechanism D for reciprocating the traveling carriage 10 on the track R includes a single slide bar 15 disposed in the track R and a drive for reciprocating the slide bar 15. It comprises a source D0, a piece 17 provided on the slide bar 15 at a distance smaller than the reciprocating amount of the slide bar 15, and a clutch C provided on the traveling carriage 10. The traveling carriage 10 is engaged and moved in one direction along the track R. That is, as shown in FIG. 4, in the traveling carriage 10, when the clutch C is held in the right-tilting posture, the piece 17 engages with the left end C1 of the clutch when the slide bar 15 moves to the right, and the stroke It is turned right by the amount. Further, as shown in FIG. 5, when the clutch C is held in the left-tilting posture, the traveling carriage 10 has the piece 17 locked to the right end C2 of the clutch when the slide bar 15 is returned to the left, and the stroke Left by the amount. As the drive source D0, a mechanism that decelerates the rotation of the motor to change to a crank motion, a mechanism that directly moves back and forth with a hydraulic cylinder, and the like can be used as appropriate.
[0023]
As shown in FIG. 2, the slide bar 15 has left and right concave portions of a holding portion 4A suspended below the center portion of the support 4 that is installed between the upper edges 2B and 3B of the two structural steels 2 and 3 at an appropriate interval. 4B and 4C are slidably mounted by inserting guide edges 15A and 15B protruding from the left and right sides of the upper surface.
[0024]
The direction change of the traveling carriage 10 is performed by changing the engagement position of the piece 17 at the left end C1 and the right end C2 of the clutch C as shown in FIGS. The engagement position is changed by curved plates H1 and H2 which are moving direction reversing means provided at both ends of the slide bar 15. That is, the curved plates H1 and H2 receive the clutch C traveling toward this, and change the direction of engagement with the piece 17 by converting the inclined posture of the clutch to the opposite direction.
[0025]
As shown in FIG. 6, when the traveling carriage 10 moves forward on the track R, the clutch C is tilted to the right, and the traveling carriage 10 is moved to the right by the reciprocating movement of the slide bar 15, and the lower end of the scraper 5 is moved. With 5A positioned below the water surface W, the scum S is moved in the scraping direction and collected in the scum skimmer 30 (shown in FIG. 1). Then, the scraper moving means 20 is activated when the traveling carriage 10 comes into contact with a stopper 32 disposed at the end of the track R. That is, at the end position of the forward movement, the lower end 5A of the scraper 5 is tilted and lifted onto the water surface W, and the moving direction reversing means H1 provided at both ends of the slide bar 15 receives the proceeding clutch C, Change the tilt posture of C from right to left.
[0026]
As shown in FIG. 7, the traveling carriage 10 is returned from the end position to the start position by using the reciprocating movement of the slide bar 15 as a drive source. When returning to this starting end position, the scraper moving means 20 is operated in contact with the stopper 33 at the starting end position of the backward movement. Thus, the lower end 5A of the scraper 5 is changed from the oblique posture to the vertical posture and lowered below the water surface W, and the moving direction reversing means H2 provided at the start end portion of the slide bar 15 receives the proceeding clutch C, Change the tilting posture of the clutch from left to right. Then, again, as shown in FIG. 6, the traveling carriage 10 moves in the scraping direction with the lower end 5 </ b> A of the scraper 5 positioned below the water surface W by the reciprocating movement of the slide bar 15 by the right-tilting posture of the clutch C. In the following, the above action is repeated.
[0027]
In the reciprocating scum scraper 100, cover bodies 42 and 44 are attached between the clutch holding portion 40 of the traveling carriage 10 and the side surfaces 15C and 15D of the slide bar 15.
[0028]
That is, as shown in FIGS. 2 and 8 to 11, the cover bodies 42 and 44 are attached to the left and right vertical plates 7 </ b> A and 7 </ b> B in the clutch holding portion 40 of the traveling carriage 10 in an inclined posture. Yes. The cover bodies 42 and 44 include top edge portions 42A and 44A and attachment pieces 42B and 44B. The attachment edges 47A and 49A of the attachment plates 47 and 49 are joined to the attachment pieces 42B and 44B, and a plurality of screws B1 are attached. , B2 and the mounting portions 47B, 49B are screwed to the vertical plates 7A, 7B by three support shafts 7C and nuts B3. The top edges 42A and 44A of the cover bodies 42 and 44 are brought into contact with both side surfaces 15C and 15D of the slide bar 15 to cover the gap G between the slide bar 15 and the clutch holding part 40. Further, the lengths of the two cover bodies 42 and 44 are set to be longer than the length of the left and right vertical plates 7A and 7B with respect to the traveling direction of the traveling carriage 10, and foreign matter is introduced into the clutch holding portion 40 from the front and rear in the traveling direction. It is designed not to invade. The cover bodies 42 and 44 are made of resin and have excellent frictional resistance and wear resistance.
[0029]
In addition, long dropping holes 7 </ b> D and 7 </ b> E are provided in the frame body 7 outside the rolling range that is the front and rear sides of the clutch C in the clutch holding portion 40 of the traveling carriage 10. Enclosures 7F and 7G extending downward are formed around the dropping holes 7D and 7E. Thereby, even if the foreign matter K enters the clutch holding portion 40 from the opening such as the inspection port, the foreign matter K is dropped downward and the foreign matter K is prevented from entering obliquely from below by the water spray W1. Yes.
[0030]
The reciprocating scum scraper 100 according to the present invention is configured as described above and operates as follows. First, the reciprocating scum scraper 100 travels a traveling carriage 10 with a scraper that can travel along a track R provided on a water surface such as a water conduit 1 and a sedimentation basin, and scrapes a floating scum S. There is a slide bar 15 that reciprocates on the track, and a piece 17 provided at intervals on the slide bar 15 is engaged with a clutch C provided on the travel cart 10 to move the travel cart 10 along the track R. A drive mechanism D that moves in one direction is provided.
[0031]
Further, both end portions of the slide bar 15 are provided with moving direction reversing means H1 and H2 for changing the engagement direction of the clutch C, and the traveling carriage 10 is scraper during the forward movement in cooperation with the opposing stoppers 32 and 33. Scraper moving means 20 is provided for positioning the lower end 5A below the water surface W and for positioning the scraper lower end 5A on the water surface W during backward movement. Then, cover bodies 42 and 44 are attached to the clutch holding portion 40 of the traveling carriage 10 so as to come into contact with the side surfaces 15C and 15D of the slide bar 15 and cover the gap G between the side surfaces 15C and 15D.
[0032]
During the operation of the reciprocating scum scraper 100, the clutch holding portion 40 attached to the traveling carriage 10 has inspection ports T1, T2, T3 and the like provided at a plurality of places in the water conduit 1 that is made into a culvert as shown in FIG. The foreign matter K may enter from the opening. However, since the cover bodies 42 and 44 are attached to the clutch holding portion 40 so as to contact the side surfaces 15C and 15D of the slide bar 15 and cover the gap G between the cover bodies 42 and 44. Intrusion of foreign matter K into the wall is completely prevented. As a result, there is no possibility that the foreign matter K is caught in the clutch C provided on the traveling carriage 10, and the clutch C continues to function normally and is reliably engaged with the piece 17 provided on the slide bar 15. The carriage 10 can be reliably moved in one direction along the track R.
[0033]
The reciprocating scum scraper 100 is a clutch holding part 40 and is provided with drop holes 7D and 7E outside the rolling range of the clutch C. Therefore, even if the foreign matter K enters the clutch holding portion 40 from the space above the clutch holding portion 40, the foreign matter K is dropped downward from the drop holes 7D and 7E provided outside the rolling range of the clutch C.
[0034]
As a result, the foreign matter K does not bite into the clutch C, the clutch C continues to function normally, and is securely engaged with the piece 17 provided on the slide bar 15, and the traveling carriage 10 is moved along the track R one by one. It can be moved reliably in the direction.
[0035]
Further, since the reciprocating scum scraper 100 has surrounding portions 7F and 7G extending downward around the drop holes 7D and 7E, the foreign matter K is dropped from the obliquely downward direction by the force of the water spray 50. When attempting to enter the clutch holding part 40 through 7D and 7E, the surrounding parts 7F and 7G guard to prevent entry.
[0036]
As a result, the foreign matter K does not bite into the clutch portion, the clutch C functions normally, is reliably engaged with the piece 17 provided on the slide bar 15, and the traveling carriage 10 is moved in one direction along the track R. It can be moved reliably.
[0037]
The reciprocating scum scraper 100 according to the present invention is not limited to the above embodiment. First, a configuration in which only the cover bodies 42 and 44 are provided, or a configuration in which only the drop holes 7D and 7E are provided. Even if comprised in this way, there can exist an effect similar to the above. The material of the cover bodies 42 and 44 may be changed to a suitable material such as a rubber material. Further, the shapes of the cover bodies 42 and 44 and the drop holes 7D and 7E may be changed as appropriate, and the shapes of the surrounding portions 7F and 7G can be changed as appropriate.
[0038]
【The invention's effect】
According to the reciprocating scum scraper according to claim 1 of the present invention, a cover body that is in contact with the side surface of the slide bar and covers the clearance between the clutch holding portion and the clutch holding portion of the traveling carriage is attached. The cover body can prevent foreign matter from entering the clutch holding portion. Thus, the clutch provided on the traveling carriage functions normally, can be reliably engaged with the piece provided on the slide bar, and the traveling carriage can be reliably moved in one direction along the track.
[0039]
Further, according to the reciprocating scum scraper according to claim 2, since the dropping hole is provided outside the rolling range of the clutch in the clutch holding portion of the traveling carriage, the dropping hole is provided even if foreign matter enters the clutch holding section of the traveling carriage. Can be dropped downwards. Therefore, foreign matter does not bite into the clutch, the clutch functions normally, can be reliably engaged with the piece provided on the slide bar, and the traveling carriage can be reliably moved in one direction along the track.
[0040]
According to a third aspect of the present invention, the reciprocating scum scraper includes a cover body that contacts the side surface of the slide bar and covers the gap between the clutch holding portion and the clutch holding portion of the traveling carriage, and a clutch of the clutch holding portion. Since the drop hole is provided outside the rolling range, the cover body can prevent foreign matter from entering the clutch holding part. Even if foreign matter enters the clutch holding part from the space above the clutch holding part, the cover hole can move downward from the drop hole. Can be dropped. Therefore, it is possible to prevent the foreign matter from entering the clutch holding portion and eliminate the foreign matter without adhering even if the foreign matter enters the clutch.
[0041]
Further, since the reciprocating scum scraper according to claim 4 is formed with a surrounding portion extending downward around the dropping hole, even if foreign matter tries to enter the clutch holding portion from the obliquely downward direction by the force of water spray. The enclosure can guard and prevent entry. Therefore, foreign matter does not bite into the clutch portion, the clutch of the traveling carriage functions normally, can be reliably engaged with the piece provided on the slide bar, and the traveling carriage is reliably moved in one direction along the track. be able to.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a reciprocating scum scraper according to an embodiment of the present invention.
FIG. 2 is a perspective view of a traveling carriage of a reciprocating scum scraper.
FIG. 3 is a plan view of a water conduit.
FIG. 4 is a cross-sectional view of the terminal side of the traveling carriage.
FIG. 5 is a cross-sectional view of the starting end side of the traveling carriage.
FIG. 6 is a cross-sectional view showing the operation of a traveling carriage.
FIG. 7 is a cross-sectional view showing the operation of the traveling carriage.
FIG. 8 is a plan view of a traveling carriage of a reciprocating scum scraper equipped with the present invention.
FIG. 9 is a sectional view of a traveling carriage of a reciprocating scum scraper equipped with the present invention.
FIG. 10 is a cross-sectional view of a traveling carriage of a reciprocating scum scraper equipped with the present invention as seen from a traveling direction side.
FIG. 11 is a cross-sectional view of the clutch holding portion of the traveling carriage as viewed from the traveling direction side.
FIG. 12 is a cross-sectional view showing a clutch holding part of a conventional traveling carriage.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Water guide rod 2, 3 Shape steel 2A, 3A Lower edge 5 Scraper 5A Lower end 6 Guide 7 Frame body 7A, 7B Vertical board 7C Support shaft 7D, 7E Drop hole 7F, 7G Enclosure 10 Traveling carriage 15 Slide bar 15C, 15D Side surface 17 piece 20 scraper moving means 21 actuating rod 23 stop adjustment 25 locking device 25A trefoil hole 25B, 25C groove 30 scum clearance 31 support part 32, 33 stopper 40 clutch holding part 42, 44 cover body 42A, 44A top edge part 42B, 44B Mounting pieces 47, 49 Mounting plates 47A, 49A Mounting edges 47B, 49B Mounting portion 50 Sprinkling spray 100 Reciprocating scum scraper B1, B2 Screw B3 Nut C Clutch C0 Arc long hole C1 Left end C2 Right end D Drive mechanism D0 Drive source G Clearance K Foreign object R Track S Scum W Water surface W1 Water spray

Claims (4)

A track provided on the surface of a waterway, a settling basin, etc., a traveling carriage with a scraper that can travel along the track, a slide bar that reciprocates on the track, and a space provided on the slide bar. A driving means for moving the traveling carriage in one direction along the track by engaging a piece with a clutch provided on the traveling carriage and capable of changing the engagement direction, and an engagement of the clutch provided at both ends of the slide bar. A reciprocating scum scraper equipped with a moving direction reversing means for changing the alignment direction, and a scraper moving means provided on the traveling carriage for positioning the scraper lower end below the water surface during forward movement and positioning the scraper lower end above the water surface during backward movement. In the machine, a reciprocating shoe, wherein a cover body is attached to the clutch holding portion of the traveling carriage so as to contact a side surface of the slide bar and cover a gap between the slide bar and the clutch holding portion. Arm scraped up machine. A track provided on the surface of a waterway, a settling basin, etc., a traveling carriage with a scraper that can travel along the track, a slide bar that reciprocates on the track, and a space provided on the slide bar. A driving means for moving the traveling carriage in one direction along the track by engaging a piece with a clutch provided on the traveling carriage and capable of changing the engagement direction, and an engagement of the clutch provided at both ends of the slide bar. A reciprocating scum scraper equipped with a moving direction reversing means for changing the alignment direction, and a scraper moving means provided on the traveling carriage for positioning the scraper lower end below the water surface during forward movement and positioning the scraper lower end above the water surface during backward movement. A reciprocating scum scraper, characterized in that a dropping hole is provided outside the rolling range of the clutch in the clutch holding portion of the traveling carriage. A track provided on the surface of a waterway, a settling basin, etc., a traveling carriage with a scraper that can travel along the track, a slide bar that reciprocates on the track, and a space provided on the slide bar. A driving means for moving the traveling carriage in one direction along the track by engaging a piece with a clutch provided on the traveling carriage and capable of changing the engagement direction, and an engagement of the clutch provided at both ends of the slide bar. A reciprocating scum scraper equipped with a moving direction reversing means for changing the alignment direction, and a scraper moving means provided on the traveling carriage for positioning the scraper lower end below the water surface during forward movement and positioning the scraper lower end above the water surface during backward movement. In the machine, a cover body is attached to the clutch holding portion of the traveling carriage so as to contact the side surface of the slide bar and cover the gap between the sliding bar and the clutch holding section. Reciprocating scum scraped up machine, characterized in that a hole darken outside rolling range of the clutch a latch holder. 4. A reciprocating scum scraper according to claim 2, wherein a surrounding portion extending downward is formed around the dropping hole.

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