JPS6137404B2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a concrete paving machine,
In particular, it automatically eliminates the accumulation of mortar scraped by the finishing screed on the front surface of the finishing screed, which allows the finishing screed itself to move smoothly, improves the paved surface, and improves work efficiency. Concerning concrete paving machines that improve performance and contribute to labor savings.

As shown in the embodiment of the present invention in FIG.
is provided, concrete is poured into this formwork 1, and the upper surface of the concrete is finished with mortar. This mortar finishing is carried out by means of a finishing screed 6.

That is, the finishing screed 6 is installed on an underframe 4 shown by two-dot chain lines provided outside the left and right formwork 1, and is mounted on the rail 2 by wheels 3 provided on the left and right underframes 4. While moving, scrape off the mortar and finish the surface flat. 5 is a handle provided on the underframe 4 for adjusting the height of the finishing screed 6. Other than this finishing screed 6, no device is attached to remove the scraped mortar. This mortar therefore accumulates in front of the finishing screed 6.
This gradually accumulated mortar creates a large running resistance on the machine itself, and the finishing screed is pushed up slightly, leaving the scraped mortar behind as it runs, resulting in a poor surface finish.
Therefore, several workers were always assigned to remove the mortar that had accumulated in front of the finishing screed 6.

It is also known that a finishing screed is provided with a transverse blade, whereby the mortar scraped off and accumulated on the front surface of the finishing screed is removed from side to side by the movement of the transverse blade.

However, the mortar pushed left and right by the transverse blades spills and accumulates on the rails, making it impossible to run, or if you are forced to run on a rail with mortar adhering to it, the finishing screed is lifted, as described above. This leads to a poor finished surface and requires a worker to remove it, resulting in poor workability and high labor costs, which is also economically disadvantageous.

The present invention has been made in view of the above-mentioned problems, and includes a traversing blade provided in front of the finishing screed and rotating blades disposed on the left and right underframes. The mortar in front of the finishing screed can be automatically removed without causing the mortar pushed out on both sides to fall onto the rail while being pushed inward by the rotating blade.

The gist of this is that in a concrete paving machine equipped with a finishing screed installed on left and right underframes with wheels that run on rails, a bracket integrated with a traversing device is installed near the front of the finishing screed. The rack is fixed, and one side of the swing blade is fixed to a shaft that is rotatably supported by upper and lower brackets that also serve as bearings fixed to the left and right underframes, and one end is fixed to the shaft of the swing blade. The arm and the pinion provided on the upper bracket are connected by a link mechanism equipped with a spring, and the pinion and the rack engage with each other to rotate the swing blade inward,
Mortar for a concrete paving machine, characterized in that the mortar pushed out to the left and right sides of the front surface of a finishing screed by a traversing blade is automatically pushed inward and removed forward by a rotating blade. Exists in automatic removal equipment.

The present invention will be explained below with reference to embodiments shown in the drawings.

In FIGS. 1 and 2, the guide rail 10
is constructed via a connecting member 25 attached to the middle part of a pinch 24 whose upper and lower ends are supported by a pair of opposing U-shaped brackets 23 fixed to the left and right underframes 4. . A traversing device 11 is movably fitted into this approximately horizontal guide rail 10, and a traversing blade 7 is integrally vertically disposed via a bracket 8 fixed to the lower end of this traversing device 11. . The traversing device 11 connects both sides of the main body to a chain 15 that spans a pair of left and right sprockets 16 provided on each of the connecting members 25, and connects a hydraulic motor 2 provided on one of the connecting members 25.
Chain 1 driven via the power transmission mechanism at 6
5 and guided by guide rails 10, making it possible to move horizontally. That is, as is clear from the plan view of FIG. 2, when the traversing device 11 that has been traversing on the guide rail 10 traverses to the left in the figure,
When the protruding end of the stay 14 fixed to the upper end of the traversing device 11 and protruding slightly upward comes into contact with the lever 28 and continues to push it to the left, it connects to the other end of the lever 31 whose one end is connected to the lever 28. The hinge 29 is driven through the link mechanism that connects the switching valve 3.
Switch 0. By switching the switching valve 30, the hydraulic motor 26 (FIG. 1) rotates in the opposite direction, and the sprocket 16 also rotates in the opposite direction, thereby causing the traversing device 11 to be pulled by the following chain 15 in the opposite direction (to the right in the diagram). move on the guide rail 10. When the stay 14 on the other side comes into contact with the lever 28 on the right side, the levers 28, 31, etc. on the left side operate in the same manner as described above via the rod 27 connecting the left and right levers 28 to switch the switching valve 30. In this manner, the switching valve 30 is switched to cause the hydraulic motor 26 to perform forward and reverse rotation, and the traversing device 11 traverses on the guide rail 10 in the opposite direction.

Next, reference numeral 17 is a rotating blade, and a lower bracket 20 that also serves as a bearing is fixed to the left and right underframes 4.
One side of the upper bracket 21 is fixed to a shaft 18 which is rotatably supported between the upper bracket 21 and the upper bracket 21. The rotating blade 17 is rotated by a rack 9 fixed to a bracket 8 fixed to the lower end of the traversing device 11.

In FIGS. 3 and 4, the rotating blade 17 is fixed to a shaft 18 supported between brackets 20 and 21.
An arm 35 is fixed to the shaft 18 so as to be substantially perpendicular to the shaft 18. On the other hand, the pinion 32 is rotatably attached to the upper bracket 21, and the pinion 32 and the arm 35 are connected at one end to the other by a link mechanism of levers 33 and 34, so that the other end of the lever 34 is connected to the arm 35 side. , the other end of the lever 33 is connected to the pinion 32 side. The method of this connection is as shown in detail in FIG.
is rotatably attached to one end of the pinion 32 by a pin 37, and the lever 34 is rotatably attached to the approximate center of the arm 35 by a pin 39. 38 to form a link mechanism. 3
A spring 6 is stretched between the arm 35 and the pin 38, and normally tends to rotate the lever 34 clockwise around the pin 39. 40 is a stopper provided on the pinion 32;
Only when the pinion rotates clockwise, the stopper 40 hits the lever 33, and the pinion 32 and lever 33 work together to rotate the lever 35 via the lever 34.On the other hand, when the pinion 32 rotates counterclockwise, Rotation is not transmitted to the lever 35.

On the other hand, as shown in FIG.
A pair of upper and lower rollers 19 are provided to sandwich the guide rail 10. Of this roller 19,
As shown in FIG. 1, the lower roller 19 can be gripped with respect to the guide rail 10 by means of a fixed metal fitting 22. A bracket 8 is fixed to the lower part of the traversing device 11 by a pin 42 via a block 41, and the traversing blade 7 is integrally attached to the lower part of the bracket 8. Reference numeral 13 is a handle for adjusting the height of the traversing blade 7, and the height is adjusted by rotating the shaft 12 and moving the traversing blade 7 up and down together with the bracket 8 through the threaded portion with the boss. . The traversing blade 7 is formed in the shape of a plow, and is shaped so that when the traversing blade traverses, the mortar is pushed out toward the front of the center.

Next, the effect will be explained.

First, the heights of the finishing screed 6 and the traversing blade 7 are adjusted according to the finished surface by operating the handles 5 and 13, and the concrete paving machine runs on the rail 2. At this time, the hydraulic motor 26 is also driven.

In this state, as shown in FIG. 5, the traversing blade 7 moves to the left in the figure, and the rack 9 pushes the pinion 32 as shown by the two-dot chain line.
The process moves to the rotating blade 17. As shown in FIG. 6B, the switching valve 30 switches at this position, the hydraulic motor 26 rotates in the opposite direction, and the traversing blade 7
As shown in FIG. 6C, the mortar 9 and the pinion 32 move in the opposite direction (to the right) as shown in the arrow, and the mortar 9 and the pinion 32 are brought into mesh with each other, causing the pinion 32 to rotate in the direction shown in the arrow (clockwise). Due to this rotation of the pinion 32, the lever 33 is simultaneously pushed by the stopper 40 and the pin 3
7, and this rotational force is transmitted to the lever 34 via the pin 38, causing the arm 35 to rotate in the direction of the arrow. As a result, the shaft 18 to which the arm 35 is fixed rotates, and at the same time the rotating blade 17 fixed to the shaft 18 also pivots clockwise, that is, inward. From this state, the traversing blade 7 moves to the right, and along with this, the rack 9 also moves as indicated by the arrow, as shown in FIG. rotates in the opposite direction and begins to return to its original position. When the rack 9 moves further into the state shown in FIG. 6E, the levers 33 and 34 are bent deeply into a dogleg shape, and the rotating blade 17 returns to its original position. That is, Rack 9
During the meshing rotation of the pinion 32, the rotating blade reciprocates by pushing inward and returning. When the rack 9 and pinion 32 are disengaged in this state E, the lever 34 is pulled by the elastic force of the expanding spring 36 and rotates clockwise about the pin 39, returning to the state A. Between Ho and A, the rotating blade does not rotate inward, only the lever and pinion move, returning to the original state. The role of the spring 36 is to apply a clockwise pressing force to the pinion against the rack 9 in the state shown in FIG. 6B, thereby ensuring the meshing of the teeth. Return the pinion 32, lever 33, and lever 34 from Ho to A.
The rotating blade 17 remains as it is and only the levers return.

Now, the mortar scraped off by the finishing screed 6 is pushed forward and collected laterally by the traversing blade 7 formed in the shape of a plow, and the traversing blade 7 begins to return in the opposite direction. At this time, the rotating blade 17 automatically rotates inward to push the mortar inward, and at the same time automatically rotates back to its original state.

Further, by appropriately selecting the number of times the traversing blade 7 traverses with respect to the running speed of the finishing screed 6, the mortar on the front portion of the finishing screed 6 can be suitably removed.

According to the automatic mortar removal device for a concrete paving machine of the present invention configured as detailed above,
A traversing blade is provided at the front of the finishing screed, a rack is provided to traverse with the traversing blade, and a pinion meshing with the rack is used to move the screed inwardly through a link mechanism equipped with a spring. Since rotating blades are installed on the left and right underframes, the mortar scraped by the finishing screed is pushed out in front of the finishing screed without dropping the mortar onto the rails like with conventional paving machines. It can be automatically removed and the road surface can be finished in good condition. Moreover, it is an economically advantageous invention that can contribute to labor saving and improve workability.

[Brief explanation of the drawing]

1 to 6 show an embodiment of the present invention,
Figure 1 is a front view, Figure 2 is a plan view, and Figure 3 is a front view.
A cross-sectional view taken along line B-B in the figure, Figure 4 is A of Figure 1.
5 is a plan view showing the positional relationship between the finishing screed, the traversing blade and the rotating blade, and FIG. 6 is an explanatory view showing the operation of the rotating blade. 4... Underframe, 6... Finishing screed, 7... Traversing blade, 8... Bracket,
9...Rack, 10...Guide rail, 17...
Swivel blade, 32...pinion.

Claims (1)

[Scope of Claims] 1. In a concrete paving machine equipped with a finishing screed installed on left and right underframes having wheels running on rails, a concrete paving machine provided integrally with a traversing device near the front of the finishing screed. A traversing blade is provided through the bracket,
A rack is fixed to the bracket, and one side of the swivel blade is fixed to a shaft that is rotatably supported by upper and lower brackets that also serve as bearings fixed to the left and right underframes. An arm fixed at one end and a pinion provided on the upper bracket are connected by a link mechanism equipped with a spring, and when the pinion and the rack mesh, the swing blade is rotated inward, and the traversing blade is rotated. Therefore, the mortar in front of the finishing screed is removed forward, on both the left and right sides, and the mortar pushed out on both the left and right sides is automatically pushed inward by the rotating blade and removed forward. Automatic mortar removal device for concrete paving machines. 2. According to claim 1, the traversing device is connected to a chain driven by a hydraulic motor via a transmission mechanism, and is configured to traverse while being guided by a guide rail provided between the left and right underframes. automatic mortar removal device for concrete paving machines. 3 When the stay provided on the traversing device comes into contact with either of the left and right levers connected to each other by rods of the link mechanism disposed near the left and right underframes, the hinge is actuated via the link mechanism to close the switching valve. The automatic mortar removal device for a concrete paving machine as set forth in claim 1 and the preceding paragraph, wherein the traversing direction of the traversing device is made variable by switching between forward and reverse rotation of the hydraulic motor.