Concrete finisher

Abstract

To provide a small-sized concrete finisher having a simple structure, not requiring a large power source, and capable of easily finishing and constructing concrete.SOLUTION: A concrete finisher 10 includes a movable platform 20 movably arranged on frame portions 71 on both sides of a concrete 70 in the paving width direction, a rail 30 connecting the movable platform 20, a working device 40 movably mounted on the rail 30 for spreading and finishing the concrete 70, and a movement mechanism 34 for moving the working device 40. The working device 40 includes a first shaft 51 extending vertically and rotatably mounted on front and rear frames 48, a first swinging finishing member 52 mounted on the first shaft 51 via a fixed member 53 so as to be swingable forward in the paving direction for spreading and finishing the concrete 70, and a first swing angle limiting member for limiting the swing angle of the first swinging finishing member 52.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a concrete finisher that spreads and finishes pre-hardened concrete to a flat surface. [Background technology]

[0002] Conventionally, concrete pavements have been completed by workers spreading and leveling unhardened concrete with a construction tool, similar to the way concrete is spread and leveled with a plastering trowel, and then allowing the concrete to harden. Patent Document 1 discloses a construction tool for spreading and leveling concrete.

[0003] The construction tool of Patent Document 1 comprises a handle member that can be gripped by a worker's hand, a support member attached to the tip of the handle member so as to intersect with the handle member at a right angle, and a rectangular plate-shaped leveling member that is detachably attached to the support member. The handle member comprises a fixed portion and an extendable portion that is slidably attached to the fixed portion. The support member is formed of a long elastic material with a C-shaped cross section, and has a groove on its inside that can hold one long side of the leveling member. The leveling member is formed of an elastically deformable foam synthetic resin material, and is flexible and extendable.

[0004] By holding this construction tool in one hand, the worker can spread and finish the pre-hardened concrete evenly.

[0005] However, the construction tool in Patent Document 1 is a so-called rake-like tool, and since a worker needs high skill and physical strength to evenly lay and finish a large area of ​​concrete pavement, it is difficult to do the work by hand in these days when the number of skilled workers is decreasing. Therefore, a mechanical device called a concrete finisher that evenly lays and finishes concrete is also commonly used.

[0006] A conventional concrete finisher is a common type of machinery in which a work machine moves back and forth from side to side on a work platform arranged in the width direction of the pavement, and a screw auger attached to the end of the work machine pushes out concrete supplied to the front of the platform, and a vibrator-equipped plate finishes by spreading it flat and leveling it.

[0007] However, conventional concrete finishers, which are common mechanical devices, are large and have complex structures, and the traveling device for moving the concrete finisher also requires a large amount of power. [Prior art documents] [Patent documents]

[0008] [Patent Document 1] Japanese Patent Publication No. 2020-122325 Summary of the Invention [Problem to be solved by the invention]

[0009] In view of the above, an object of the present invention is to provide a concrete finisher that is small, has a simple structure, does not require a large amount of power, and can easily finish concrete. [Means for solving the problem]

[0010] According to an embodiment of the present invention, there is provided a concrete finisher that spreads and finishes pre-hardened concrete to a flat surface, comprising: The concrete paving machine comprises a movable platform movably arranged on both sides of the frame in the paving width direction of the concrete, rails that are installed across the movable platforms on both sides and connect the movable platforms, a working device that is movably installed on the rails and spreads and finishes the concrete, and a movement mechanism that moves the working device along the rails, The work device is characterized by comprising a frame that serves as the main body, a first axis that extends vertically from the frame, a first oscillating finishing member that is oscillatably mounted on the first axis toward the front in the paving direction and that spreads and finishes the concrete, and a first swing angle limiting member that limits the swing angle of the first oscillating finishing member.

[0011] According to this configuration, the concrete finisher includes a rail connecting a movable platform movably arranged on both sides of the frame in the width direction of the concrete pavement, and a working device movably attached to the rail via a movement mechanism and configured to spread and finish the concrete. The working device includes a first oscillating finishing member that oscillates forward in the paving direction on a first shaft extending vertically from the frame. As the working device moves back and forth on the rail (in the width direction of the pavement), the first oscillating finishing member spreads the concrete supplied forward of the working device (movable platform and rail). This allows the concrete to be finished in a manner similar to spreading and finishing concrete with a plastering trowel. Furthermore, the working device includes a first swing angle limiting member that limits the swing angle of the first oscillating finishing member. As the first oscillating finishing member moves left and right along the rail, it maintains its swing angle from the direction perpendicular to its movement toward the rear, pushing the concrete forward in the direction of the unfinished pavement, rather than backward in the direction of the finished pavement. Therefore, every time the working device is moved once in the paving width direction, the movable platform and rail are moved a little forward in the paving direction, and the working device is moved once again in the paving width direction to finish the concrete, and by repeating this process, it is possible to finish the entire surface of the concrete neatly.In addition, because the concrete finisher consists of two movable platforms and rails and a small working device that is moved by a movement mechanism, the entire device is small and simple in structure, and does not require a large amount of power, making it possible to easily finish the concrete.

[0012] Preferably, the device is equipped with a second axis extending vertically at a position opposite the first axis of the first oscillating finishing member, a second oscillating finishing member that is oscillatably mounted on the second axis and spreads and finishes the concrete, and a second oscillating angle limiting member that limits the oscillating angle of the second oscillating finishing member.

[0013] This configuration includes a second shaft extending vertically opposite the first shaft of the first oscillating finishing member, a second oscillating finishing member oscillating on the second shaft to spread and finish the concrete, and a second oscillating angle limiter that limits the oscillating angle of the second oscillating finishing member. Therefore, the oscillating finishing member, together with the first oscillating finishing member, oscillates at two different angles. If a certain area were to be finished using only the first oscillating finishing member, the concrete at the rear end of the oscillating finishing member would have to be pushed forward toward the unfinished pavement, which would place a large load on the first oscillating finishing member. However, by further oscillating the second oscillating finishing member relative to the first oscillating finishing member as in this embodiment, the angle of the second oscillating finishing member becomes gentler, making it easier to deflect the concrete forward, thereby reducing the load on the entire oscillating finishing member. This allows the working device to be moved with less force via the movement mechanism.

[0014] Preferably, the swing angle limiting member limits the swing angle of the swing finishing member to between 10 degrees and 20 degrees to the left and right, The rails are arranged at a rail angle that is oblique to the pavement width direction in a plan view, and the rail angle is smaller than the swing angle.

[0015] According to this configuration, if the swing angle of the swinging finishing member is less than 10 degrees, the angle of the rail relative to the pavement width direction must be increased to flow the concrete forward in the paving direction, which requires the length of the swinging member to be increased. Furthermore, if the swing angle of the swinging finishing member is greater than 20 degrees, the finishing width per operation becomes smaller, so to avoid this, the length of the swinging member must also be increased. In this regard, by limiting the swing angle of the swinging finishing member to between 10 and 20 degrees on each side, an appropriate finishing width can be ensured while reducing the length of the swinging finishing member, thereby improving work efficiency. Furthermore, because the rails are arranged at a rail angle that is oblique to the pavement width direction in a plan view and is smaller than the swing angle, each time the working device moves left and right on the rail (in the pavement width direction), the movable platform on either side that the working device has not reached can be moved forward in the paving direction, allowing for repeated concrete finishing work. As a result, the concrete finisher is small, has a simple structure, does not require large power, and allows for easy concrete finishing work.

[0016] Preferably, the first oscillating finishing member is a rod-shaped member.

[0017] According to this configuration, the first oscillating finishing member is a rod-shaped member, and therefore can maintain its strength while smoothly spreading and finishing the concrete in both the left and right directions using the lower arcuate surface.

[0018] Preferably, the second oscillating finishing member is a blade.

[0019] According to this configuration, the second oscillating finishing member is a blade, so that it can be made lightweight and occupy a small space.

[0020] Preferably, the moving mechanism includes sprockets provided at both ends of the rail, a chain hung between the sprockets, a motor for rotating the sprockets, and a fixing part provided on the working device and fixed to the chain.

[0021] With this configuration, the moving mechanism is a simple one consisting of a sprocket, chain, motor, and fixed part, so the concrete finisher can be made small and simple, and it can easily finish concrete without requiring a large amount of power. Furthermore, the movable platform can be easily replaced with rails and chains of different lengths, making it easy to handle concrete paving of different widths. [Effects of the Invention]

[0022] To provide a concrete finisher which is small in size, has a simple structure, does not require a large power source, and can easily finish concrete. [Brief explanation of the drawings]

[0023] [Figure 1] Fig. 1(A) is a plan view of a concrete finisher according to an embodiment, and Fig. 1(B) is a view taken along the arrow 1B in Fig. 1(A). [Figure 2] FIG. 2 is a view taken along the arrow 2 in FIG. 1(B). [Figure 3] FIG. 3 is a cross-sectional view taken along line 3-3 in FIG. 1(B). [Figure 4] FIG. 4 is a view taken along the arrow 4 in FIG. [Figure 5] FIG. 5 is a view taken along the arrow 5 in FIG. [Figure 6] FIG. 6 is a cross-sectional view taken along line 6-6 in FIG. [Figure 7] Fig. 7(A) is a view seen from the arrow 7 in Fig. 5. Fig. 7(B) is a plan view of the fixing part. Fig. 7(C) is a front view of the fixing part. [Figure 8] FIG. 8 is a diagram showing the operation of the concrete finisher according to the embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0024] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings. The drawings are intended to conceptually (schematically) illustrate a concrete finisher. [Example]

[0025] The circumstances surrounding the use of the concrete finisher 10 will now be described. As shown in Figures 1 and 8, when constructing a concrete pavement on a road, for example, frame sections 71 are arranged along the paving direction at both ends of the road in the pavement width direction. Note that square timbers, curbs, or road shoulders may be used instead of the frame sections 71. The upper surfaces of the frame sections 71 at both ends of the road are higher than or at the same level as the upper surface of the concrete 70 to be laid and finished, and movable platforms 20 are arranged on both sides of the frame sections 71, and rails 30 are stretched across and connected to the movable platforms 20 on both sides. The movable platforms 20 and rails 30 can be moved together. In addition, a work device 40 that lays and finishes the concrete on the rails 30 is movably provided.

[0026] Next, the concrete finisher 10 will be described. As shown in Figure 1, the concrete finisher 10 is a device that spreads and levels pre-hardened concrete 70 to create a flat finish. The concrete finisher 10 includes a movable platform 20 that is manually movable by an operator on frame portions 71 on both sides of the concrete 70 in the paving width direction, rails 30 that are installed across the movable platforms 20 on both sides and connect the movable platforms 20, a working device 40 that is movably installed on the rails 30 and that spreads and levels the concrete 70 to create a finish, and a movement mechanism 34 that moves the working device 40 along the rails 30.

[0027] Next, the movable base 20 will be described. 1 and 2, the movable platform 20 is made up of two installation sections 21 arranged on a frame section 71, a V-shaped section 22 arranged on the installation sections 21 in a V-shape when viewed from the side, a pillar section 23 arranged above the top of the V-shaped section 22, and upper and lower connection sections 24 connecting the two pillar sections 23. Of the movable platforms 20 arranged on both sides in the paving width direction, one of the movable platforms 20 is provided with a motor 36 that constitutes a movement mechanism, and a sprocket 34 is attached to the shaft of this motor 36.

[0028] Next, the rail 30 will be described. 1, 2, and 4, the rail 30 includes an upper rail 31 provided on the upper part of the movable base 20, a lower rail 32 provided in the vertical middle of the movable base 20, a plurality of diagonal reinforcing members 33 provided diagonally between the upper rail 31 and the lower rail 32, sprockets 34 rotatably provided at both ends of the upper rail 31 and the lower rail 32 in the width direction, a chain 35 looped around the sprockets 34, and a motor 36 that drives one of the sprockets 34. The motor 36 may be provided on either the movable base 20 or the rail 30.

[0029] Next, the working device 40 will be described. As shown in Figures 1 and 3 to 7, the working device 40 comprises rollers 41 that are mounted so that they can roll on the rails 30, roller support parts 42 that rotatably support these rollers 41, upper and lower frames 43 that are mounted on the roller support parts 42 and form the main body, a working sprocket 44 that is rotatably mounted on the upper and lower frames 43 and to which the upper chain 35 is hung, fixing parts 45 that are mounted on the upper and lower frames 43 and to which the lower chain 35 is fixed, and front and rear frames 48 that are mounted at the lower ends of the upper and lower frames 43 and extend in the front-to-rear direction (perpendicular to the rails).

[0030] The work device 40 also includes a first shaft 51 that extends vertically and is rotatably mounted on the front and rear frames 48, a first oscillating finishing member 52 that is oscillated forward in the paving direction via a fixed member 53 on the first shaft 51 and spreads and finishes the concrete 70, and a first swing angle limiting member 54 that limits the swing angle of the first oscillating finishing member 52.

[0031] The work device 40 also includes a second shaft 55 extending vertically at a position opposite the first shaft 51 of the first oscillating finishing member 52, a second oscillating finishing member 56 that is oscillatably attached to the second shaft 55 via a fixed member 57 and that spreads and finishes the concrete, and a second oscillating angle limiting member 58 that limits the oscillating angle of the second oscillating finishing member 56.

[0032] Furthermore, the swing angle limiting members 54, 58 limit the swing angle of the swinging finishing members 52, 56 to 15 degrees to the left and right (the first swinging finishing member 52 indicated by ∠α1 swings a total of 30 degrees, and the second swinging finishing member 56 indicated by ∠α2 also swings a total of 30 degrees). The rails 30 are arranged at a rail angle that is oblique to the pavement width direction in a plan view (see Figure 8), and the rail angle is set to be smaller than the swing angle.

[0033] The first oscillating finishing member 52 is a rod-shaped member, which allows the concrete 70 to be evenly spread and finished in both the left and right directions using the arcuate surface at the bottom while maintaining the strength of the first oscillating finishing member 52.

[0034] The second oscillating finishing member 56 is a blade, which allows the second oscillating finishing member 56 to be lightweight and occupy a small space.

[0035] In this way, the first oscillating finishing member (rod-shaped member) 52 can be oscillated within a certain range (15 degrees left and right) relative to the rail 30, and the second oscillating finishing member (blade) 56 can also be oscillated within a certain range (15 degrees left and right) relative to the first oscillating finishing member (rod-shaped member) 52.

[0036] In the embodiment, the swing angle limiting members 54, 58 are configured to limit the swing angle of the swing finishing members 52, 56 to 15 degrees to the left and right, respectively, but this is not limited to this, and the swing angle limiting members 54, 58 may also be configured to limit the swing angle of the swing finishing members 52, 56 to between 10 degrees and 20 degrees to the left and right, respectively.

[0037] Next, the movement mechanism will be described. The movement mechanism includes sprockets 34 provided at both ends of the rail 30, a chain 35 stretched between the sprockets 34, a motor 36 that rotates the sprockets 34, and a fixed part 45 that is provided on the working device 40 and fixed to the chain 35. The fixed part 45 includes, for example, a fixed shaft 46 that is inserted into the connection part of the chain 35 and has a tip that is fastened with a pin 47.

[0038] In this way, in the concrete finisher 10 of the embodiment, the only power required is the power for the working device 40 to move laterally on the rails 30. The configuration of the fixing part 45 is not limited to the above configuration, and other configurations are possible as long as the working device 40 can be fixed to the chain 35.

[0039] Next, the operation of the concrete finisher 10 of the embodiment described above will be explained. As shown in the lower part of Figure 8, frame portions 71 are arranged on both sides of the pre-hardened concrete 70 in the paving width direction. The concrete finisher 10 has the left movable platform 20 arranged on the left frame portion 71, and the right movable platform 20 arranged on the right frame portion 71. The right movable platform 20 is arranged further forward in the paving direction than the left movable platform 20, and the angle of the rail 30 inclined to the right with respect to the paving width direction is, for example, 10 degrees.

[0040] In this state, the working device 40 is placed at the left end of the rail 30, and the motor (movement mechanism) 36 is operated to move the working device 40 to the right as shown by arrow (1). This causes the first oscillating finishing member 52 to oscillate as shown by arrow (2), and the second oscillating finishing member 56 to oscillate as shown by arrow (3). In this state, by moving the working device 40 to the right as shown by arrow (1), the concrete 70 is spread and finished, and excess concrete 70 is pushed forward in the paving direction, and the concrete is finished in the next spreading and leveling operation, until the working device 40 reaches the right end of the rail 30.

[0041] Next, as shown in the upper part of Figure 8, the left movable platform 20 is moved forward in the paving direction as indicated by arrow (4) and placed on the left frame part 71. The angle of the rail 30 rising to the left with respect to the paving width direction is, for example, 10 degrees.

[0042] In this state, the motor (movement mechanism) 36 of the working device 40, which is located at the right end of the rail 30, is operated, and the working device 40 is moved leftward as indicated by arrow (5). This causes the first oscillating finishing member 52 to oscillate as indicated by arrow (6), and the second oscillating finishing member 56 to oscillate as indicated by arrow (7). In this state, by moving the working device 40 leftward as indicated by arrow (5), the concrete 70 is spread and finished, and excess concrete 70 is pushed forward in the paving direction, and is finished in the next spreading and leveling operation, until the working device 40 reaches the left end of the rail 30. By repeating the above process, the entire concrete 70 is spread and finished.

[0043] In this way, when the first oscillating finishing member (rod-shaped member) 52 and the second oscillating finishing member (blade) 56 move back and forth on the rail 30, they are pushed by the concrete 70 supplied in front of the rail 30 and spread it out, thereby finishing the concrete 70 in the same way as finishing the concrete 70 with a plastering trowel.

[0044] Next, the effects of the concrete finisher 10 of the embodiment described above will be explained. In an embodiment of the present invention, the concrete finisher 10 includes rails 30 connecting movable platforms 20 movably arranged on frame portions 71 on both sides of the paving width direction of the concrete 70, and a working device 40 that is movable on the rails 30 via a movement mechanism and that spreads and finishes the concrete 70. The working device 40 has a first oscillating finishing member 52 that spreads and finishes the concrete 70 on a first shaft 51 that extends vertically from the frames 43, 48 and is oscillated forward in the paving direction. As the working device 40 moves back and forth on the rails 30 from side to side (in the paving width direction), the first oscillating finishing member 52 spreads the concrete 30 supplied in front of the working device 40 (movable platform 20 and rails 30), thereby finishing the concrete 70 in a manner similar to spreading and finishing concrete with a plastering trowel. Furthermore, since the first swing angle limiting member 54 is provided to limit the swing angle of the first swing finishing member 52, when the first swing finishing member 52 moves left and right along the rail 30, it moves from the direction perpendicular to the movement toward the rear while maintaining the swing angle, so that the concrete 30 is pushed forward in the unfinished pavement direction rather than backward in the finished pavement direction. Therefore, by repeating the process of moving the working device 40 once in the paving width direction, moving the movable platform 20 and rail 30 slightly forward in the paving direction, and then moving the working device 40 once again in the paving width direction to finish the concrete 70, the entire surface of the concrete 70 can be finished neatly. Furthermore, since the concrete finisher 10 is composed of two movable platforms 20 and rails 30 and a small working device 40 moved by a movement mechanism, the entire device is small and simple in structure, and does not require a large power source, allowing for easy finishing of the concrete 70.

[0045] Furthermore, the first oscillating finishing member 52 is provided with a second shaft 55 extending in the vertical direction at a position opposite the first shaft 51, a second oscillating finishing member 56 that is oscillatably mounted on the second shaft 55 and spreads and finishes the concrete 70, and a second oscillating angle limiting member 58 that limits the oscillating angle of the second oscillating finishing member 56.Therefore, together with the first oscillating finishing member 52, the oscillating finishing members 52 and 56 oscillate at two angles. If a certain area were to be finished using only the first oscillating finishing member 52, the distance over which the concrete 70 at the rear end of the oscillating finishing members 52, 56 in the paving direction would be pushed forward in the direction of the unfinished pavement would be long, placing a large load on the first oscillating finishing member 52. However, by having the second oscillating finishing member 56 oscillate further relative to the first oscillating finishing member 52 as in this embodiment, the angle of the second oscillating finishing member 56 becomes even gentler, making it easier to deflect the concrete 70 forward and reducing the load on the entire oscillating finishing member. This allows the working device 40 to be moved with less force via the movement mechanism.

[0046] Furthermore, if the swing angle of the oscillating finishing members 52, 56 is set to less than 10 degrees, the angle of the rail 30 relative to the pavement width direction must be increased in order to flow the concrete 70 forward in the paving direction, and the length of the oscillating members 52, 56 must also be increased. Furthermore, if the swing angle of the oscillating finishing members 52, 56 is set to more than 20 degrees, the finished width per run becomes smaller, so to avoid this, the length of the oscillating finishing members 52, 56 must also be increased. In this regard, by limiting the swing angle of the oscillating finishing members 52, 56 to between 10 and 20 degrees to the left and right, an appropriate finished width can be achieved even with the length of the oscillating finishing members 52, 56 reduced, improving work efficiency. Furthermore, the rails 30 are arranged at a rail angle that is oblique to the paving width direction in a plan view, and the rail angle is smaller than the swing angle, so that each time the working device 40 moves left or right (in the paving width direction) on the rails 30, the movable platform 20 on either the left or right side that the working device 40 has not yet reached can be moved forward in the paving direction, allowing for repeated finishing work on the concrete 70. As a result, the concrete finisher 10 is small and simple in structure, and does not require a large amount of power, allowing for easy finishing work on the concrete 70.

[0047] Furthermore, since the first oscillating finishing member 52 is a rod-shaped member, it can maintain its strength and can evenly spread and finish the concrete 70 in both the left and right directions using the arcuate surface at the bottom.

[0048] Furthermore, since the second oscillating finishing member 56 is a blade, it can be made lightweight and occupy a small space.

[0049] Furthermore, since the moving mechanism has a simple configuration consisting of the sprocket 34, chain 35, motor 36, and fixed part 45, the concrete finisher 10 can be made small and simple in structure, and does not require a large amount of power, making it possible to easily finish and apply the concrete 70. Furthermore, the movable base 20 can be easily replaced with rails 30 and chains 35 of different lengths, making it easy to accommodate concrete 70 with different paving widths.

[0050] In the embodiment, the moving mechanism is composed of a sprocket 34, a chain 35, a motor 36, and a fixed part 45, and the working device 40 is moved by an external force, but this is not limited to this, and the moving mechanism may be a self-propelled mechanism provided in the working device 40 itself.

[0051] In addition, in the embodiment, the working device 40 has a first oscillating finishing member 52 provided via a first axis 51 and a second oscillating finishing member 56 provided via a second axis 55, making it a two-stage oscillating finishing member 52, 56, but this is not limited to this and it may also be a one-stage oscillating finishing member, a three-stage oscillating finishing member, a four-stage oscillating finishing member, or a multi-stage oscillating finishing member.

[0052] That is, the present invention is not limited to the examples as long as the functions and effects of the present invention are exhibited. [Industrial Applicability]

[0053] The technology of the present invention is suitable for a concrete finisher that spreads and finishes evenly spread pre-hardened concrete. [Explanation of symbols]

[0054] 10... Concrete finisher 20… Movable platform (work trolley) 30... Rail (work cart) 34... Sprocket (moving mechanism) 35... Chain (moving mechanism) 36... Motor (movement mechanism) 40...Work equipment 43... Upper and lower frames (frames) 45…Fixed part (moving mechanism) 48... Front and rear frames (frames) 51... First axis 52... First oscillating finishing member (rod-shaped member) 54... First angle limiting member 55... Second axis 56... Second oscillating finishing member (blade) 58... Second angle limiting member 70... Concrete (concrete before hardening) 71... Frame (timber, curb, shoulder)

Claims

1. A concrete finisher that spreads and evenly finishes pre-hardened concrete, The concrete paving machine comprises a movable platform movably arranged on both sides of the frame in the paving width direction of the concrete, rails that are installed across the movable platforms on both sides and connect the movable platforms, a working device that is movably installed on the rails and spreads and finishes the concrete, and a movement mechanism that moves the working device along the rails, The concrete finisher is characterized in that the working device comprises a frame that serves as the main body, a first axis that extends vertically from the frame, a first oscillating finishing member that is oscillated forward in the paving direction on the first axis and spreads and finishes the concrete, and a first oscillating angle limiting member that limits the oscillating angle of the first oscillating finishing member.

2. 2. The concrete finisher according to claim 1, A concrete finisher characterized by comprising: a second shaft extending in the vertical direction at a position opposite the first shaft of the first oscillating finishing member; a second oscillating finishing member oscillatingly mounted on the second shaft for spreading and finishing the concrete; and a second oscillating angle limiting member for limiting the oscillating angle of the second oscillating finishing member.

3. The concrete finisher according to claim 1 or 2, The swing angle limiting member limits the swing angle of the swing finishing member to between 10 degrees and 20 degrees to the left and right, respectively; A concrete finisher characterized in that the rails are arranged at a rail angle that is oblique to the pavement width direction in a plan view, and the rail angle is smaller than the swing angle.

4. The concrete finisher according to claim 1 or 2, A concrete finisher characterized in that the first oscillating finishing member is a rod-shaped member.

5. 3. The concrete finisher according to claim 2, A concrete finisher characterized in that the second oscillating finishing member is a blade.

6. The concrete finisher according to claim 1 or 2, The concrete finisher is characterized in that the moving mechanism comprises sprockets provided at both ends of the rail, a chain hung between the sprockets, a motor for rotating the sprockets, and a fixing part provided on the work device and fixed to the chain.

Images