Asphalt finisher

Abstract

To provide an asphalt finisher capable of ensuring sufficient compaction density of paving materials in the vicinity of structures, forms, etc. [Solution] The asphalt finisher 1 is provided with a second tamper mechanism 50 that protrudes forward with a predetermined width on both ends in the vehicle width direction of the first tamper edge 38 provided on the first tamper mechanism 35, and the second tamper edge 53 of the second tamper mechanism 50 has an underside formed with a forward-raising edge, making it possible to compact the paving material with the second tamper edge 53 prior to compacting the paving material with the first tamper edge 38.

Description

[Technical field]

[0001] The present invention relates to an asphalt finisher. [Background technology]

[0002] An asphalt finisher comprises a screed plate that vibrates up and down slightly to spread the paving material evenly, and a compaction device (tamper mechanism) that is positioned in front of the screed plate and vibrates up and down to compact the paving material. At the road paving site, one side edge in the width direction is surrounded by a structural body, and the other side edge is surrounded by a wooden formwork or the like. The paving material is poured between the structural body and the formwork or the like, the mixture is compacted by a tamper mechanism, and then spread evenly with a screed plate. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2010-090551 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, with conventional asphalt finishers, there was a risk that the compaction density of the pavement material near structures, formwork, etc. would be insufficient. Therefore, an object of the present invention is to provide an asphalt finisher that solves the above-mentioned problems of the conventional technology and can ensure sufficient compaction density of paving material in the vicinity of structures, formwork, etc. [Means for solving the problem]

[0005] The asphalt finisher according to the present invention is an asphalt finisher equipped with a screed mechanism consisting of a screed plate that vibrates slightly up and down to spread the paving material, and a tamper mechanism that is arranged in front of the screed plate and vibrates up and down to compact the paving material, the tamper mechanism is equipped with a second tamper mechanism that protrudes forward with a predetermined width on both ends in the vehicle width direction of a first tamper edge equipped in the tamper mechanism, the second tamper edge of the second tamper mechanism has a lower surface formed with a forward rise, and the second tamper edge can compact the paving material before compacting it with the first tamper edge. The tamper mechanism comprises a tamper rotating shaft portion and a first tamper rod portion through which the tamper rotating shaft portion is inserted and which vibrates together with the first tamper edge, the second tamper mechanism comprises a second tamper rotating shaft portion and a second tamper rod portion through which the second tamper rotating shaft portion is inserted and which vibrates together with the second tamper edge, and the screed mechanism comprises a deflector plate that forms a front wall portion, and a notch portion is formed in the deflector plate so that the second tamper rod portion is facing from the deflector plate. In addition, the asphalt finisher of the present invention is an asphalt finisher equipped with a screed mechanism consisting of a screed plate that vibrates slightly up and down to spread the paving material, and a tamper mechanism that is arranged in front of the screed plate and vibrates up and down to compact the paving material, and is equipped with a second tamper mechanism that protrudes forward with a predetermined width at both ends in the vehicle width direction of a first tamper edge equipped at the tamper mechanism, and the second tamper edge of the second tamper mechanism is formed with a lower surface that rises forward, allowing the second tamper edge to compact the paving material prior to compacting it with the first tamper edge, and the second tamper mechanism is configured as a protrusion provided on the front side of both ends in the vehicle width direction of the first tamper edge, and the rear end edge of the lower surface of the protrusion is formed continuous with the front end edge of the lower surface of the first tamper edge. In addition, the asphalt finisher of the present invention is an asphalt finisher equipped with a screed mechanism consisting of a screed plate that vibrates slightly up and down to spread the paving material, and a tamper mechanism that is arranged in front of the screed plate and vibrates up and down to compact the paving material, wherein the tamper mechanism is equipped with a second tamper mechanism that protrudes forward with a predetermined width at both ends in the vehicle width direction of a first tamper edge equipped at the tamper mechanism, and the second tamper edge of the second tamper mechanism has a lower surface that is formed with a forward rise, allowing the second tamper edge to compact the paving material prior to compacting it with the first tamper edge, and the screed mechanism is equipped with a strike-off plate in front of the tamper mechanism for adjusting the amount of paving material supplied, and a space portion into which the second tamper edge fits is formed in the strike-off plate. Effect of the Invention

[0006] The present invention can poke paving materials near structures, forms, etc. with the second tamper edge in addition to the first tamper edge. Therefore, the compaction density of the paving materials near structures, forms, etc. can be sufficiently ensured. [Brief description of the drawings]

[0007] [Figure 1] FIG. 1 is a side view of an asphalt finisher. [Diagram 2] FIG. 2 is a schematic diagram of an asphalt finisher viewed from above. [Diagram 3] FIG. 3 is a schematic cross-sectional view taken along line III-III of FIG. [Figure 4] FIG. 4 is a schematic cross-sectional view taken along line IV-IV of FIG. [Diagram 5] FIG. 5 is a schematic cross-sectional view seen from the VV direction in FIG. [Figure 6] FIG. 6 is a diagram showing a second tamper mechanism according to the first modification. [Figure 7] FIG. 7 is a diagram showing a protruding portion according to the first modification. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] Fig. 1 is a side view of an asphalt finisher 1 according to an embodiment of the present invention. Fig. 2 is a schematic view of the asphalt finisher 1 as viewed from above. Fig. 3 is a schematic cross-sectional view as viewed from the direction III-III in Fig. 2. In each drawing, the symbol FR indicates the front, the symbol LH indicates the left, and the symbol UP indicates the upper side. The asphalt finisher 1 comprises a vehicle body 2, a hopper 3, and a screed mechanism 4.

[0009] The vehicle body 2 includes rear wheels 5 and front wheels 6. The motors (not shown) that drive the rear wheels 5 and the front wheels 6 are hydraulic motors that are rotated by receiving hydraulic oil from a hydraulic pump. The vehicle body 2 may include crawlers instead of the rear wheels 5 and the front wheels 6. The hopper 3 receives the paving material. The paving material is, for example, an asphalt mixture. The hopper 3 is installed at the front of the vehicle body 2 and configured to be openable and closable in the vehicle width direction by a hopper cylinder 10. The asphalt finisher 1 receives the paving material from the bed of a dump truck (not shown) with the hopper 3 fully open.

[0010] The paving material fed to the rear side of the vehicle body 2 is spread in the vehicle width direction at the rear side of the vehicle body 2 and in front of the screed mechanism 4 by a screw spreader 15 provided to extend in the vehicle width direction of the vehicle body 2. In Fig. 2, the paving material P spread by the screw spreader 15 is shown by a dot pattern.

[0011] The leveling arm 7 is connected to the vehicle body 2 by a leveling cylinder 8 so as to be able to move the screed mechanism 4 up and down. The leveling arm 7 has one end connected to the screed mechanism 4 and the other end connected to the vehicle body 2 so as to be able to rotate. The leveling cylinder 8 is a hydraulic cylinder that moves the front end of the leveling arm 7 up and down to adjust the thickness of the paving material. When the thickness of the paving material is to be increased, the leveling cylinder 8 is contracted to raise the leveling arm 7. On the other hand, when the thickness of the paving material is to be decreased, the leveling cylinder 8 is extended to lower the leveling arm 7.

[0012] The screed mechanism 4 spreads the paving material. The screed mechanism 4 is a floating screed towed by the vehicle body 2 and is connected to the vehicle body 2 via leveling arms 7. The screed mechanism 4 is moved up and down together with the leveling arms 7 by the extension and retraction of the screed lift cylinders 9. A step 17 is provided on the rear side of the screed mechanism 4. The step 17 is a member that constitutes a foothold when a worker works behind the screed mechanism 4.

[0013] As shown in Fig. 2, the screed mechanism 4 includes a central main screed 11 and telescopic screeds 12 provided on the left and right sides. The main screed 11 and the telescopic screed 12 each include a vibrator 13. The vibrator 13 is a vibration device for compacting the pavement surface. The vibrator 13 is an eccentric vibrator driven by a hydraulic motor. The vibrator 13 may be driven by an electric motor, or may be a linear vibrator such as a piston vibrator. The left telescopic screed 12 is positioned forward of the right telescopic screed 12, but is not limited to this.

[0014] A telescopic moldboard 14 is provided between the screw spreader 15 and the screed mechanism 4. The ends of the screed mechanism 4 and the telescopic moldboard 14 in the vehicle width direction are attached to side plates 16. The telescopic moldboard 14 is configured to be able to move up and down on the telescopic screed 12 and the side plate 16. The telescopic moldboard 14 is a member that adjusts the amount of paving material that remains in front of the telescopic screed 12 out of the paving material spread by the screw spreader 15, and is configured to be able to extend and retract in the vehicle width direction together with the telescopic screed 12.

[0015] Next, the configuration of the extendable screed 12 will be described in detail. Fig. 4 is a schematic cross-sectional view taken along the line IV-IV in Fig. 2. Fig. 5 is a schematic cross-sectional view taken along the line VV in Fig. 4.

[0016] Hereinafter, the internal configuration of the left-side telescopic screed 12 will be described, and since the interior of the right-side telescopic screed 12 is configured symmetrically to the left-side telescopic screed 12, the description of the right-side telescopic screed 12 will be omitted. As shown in Fig. 3, the telescopic screed 12 includes a screed telescopic cylinder 18 and a pair of guide shafts 19 above and below the telescopic cylinder. By extending and retracting the screed telescopic cylinder 18, the telescopic screed 12 can be extended and retracted in the vehicle width direction.

[0017] The telescoping screed 12 comprises at its lower part a strike-off plate 30, a screed plate 31 and a first tamper mechanism 35 between the strike-off plate 30 and the screed plate 31. The strike-off plate 30, the screed plate 31 and the first tamper mechanism 35 are arranged across the entire width of the vehicle inside the telescoping screed 12.

[0018] The telescopic screed 12 is provided at its front end with a deflector plate 32. The deflector plate 32 forms the front wall of the telescopic screed 12. The deflector plate 32 is connected to an internal plate 43 of the telescopic screed 12 by a fixing member (not shown). By fastening the fixing member, the strike-off plate 30, the first tamper mechanism 35, and the screed plate 31 are each tightened, thereby reducing the gap between the members.

[0019] The strike-off plate 30 adjusts the amount of paving material supplied to the first tamping mechanism 35, which is positioned rearward of the strike-off plate 30. The lower surface of the strike-off plate 30 has an inclined portion formed to rise diagonally forward. The strike-off plate 30 is configured so that the angle at which it swallows the spread paving material and the distance between the lower end of the strike-off plate 30 and the roadbed can be set.

[0020] The screed plate 31 is supported by bolts 34 at the bottom of the screed body 33. A vibrator 13 is connected to the screed body 33. The screed plate 31 is slightly vibrated up and down by the vibrator 13 to spread and compact the paving material.

[0021] The first tamper mechanism 35 includes a tamper rotating shaft portion 36, a first tamper rod portion 37, a first tamper edge 38, and a first tamper drive portion 39.

[0022] The first tamper rod portion 37 is provided inside the extensible screed 12 and is fastened by a fixing device to an internal plate 43 extending in the vertical direction by a support portion (not shown). A tamper rotating shaft 36 that is rotationally driven by a first tamper drive 39 is inserted into the first tamper rod 37. The first tamper drive 39 is a hydraulic motor that rotates by receiving hydraulic oil from a hydraulic pump (not shown). The first tamper drive 39 is disposed inside the extensible screed 12, at one end close to the center of the vehicle body.

[0023] The tamper rotating shaft portion 36 is provided in a first eccentric hole 40 of the first tamper rod portion 37. As a result, the rotational motion of the tamper rotating shaft portion 36 is converted into the up and down reciprocating motion of the first tamper edge 38 via the first tamper rod portion 37. The first tamper mechanism 35 tampers the paving material that has been engulfed by the strike-off plate 30.

[0024] The first tamper edge 38 is formed at the lower end of a first arm portion 41 extending downward from the first tamper rod portion 37. The first tamper edge 38 is formed across the entire width of the vehicle, similar to the strike-off plate 30. The lower surface of the first tamper edge 38 has a first flat portion 38A on the rear side and a first inclined portion 38B on the front side. The lower surface of the first tamper edge 38 is formed with a front upward slope.

[0025] The first tamper mechanism 35 is configured such that, when the first tamper edge 38 is at its highest position, the height of the front edge of the first inclined portion 38B is higher than the height of the rear edge of the strike-off plate 30. The first tamper mechanism 35 is configured such that, when the first tamper edge 38 is at its lowest position, the height of the first flat portion 38A is higher than the height of the bottom surface of the screed plate 31.

[0026] 3 and 4, the screed mechanism 4 includes a second tamper mechanism 50. The second tamper mechanism 50 includes a second tamper rod portion 52 and a second tamper edge 53.

[0027] The second tamper rod part 52 is supported inside the telescoping screed 12 by a support part 57 which is fastened to the inner plate 43 by a support part bolt 58 . The tamper rotation shaft portion 36 is inserted into the second tamper rod portion 52. The second tamper rod portion 52 is provided on the tamper rotation shaft portion 36. That is, the first tamper mechanism 35 and the second tamper mechanism 50 share the tamper rotation shaft portion 36 as a rotation shaft.

[0028] A second eccentric hole 55 is formed in the second tamper rod portion 52. The tamper rotating shaft portion 36 is inserted into the second eccentric hole 55. The tamper rotating shaft portion 36 can be provided with a different phase from the first eccentric hole 40 of the first tamper rod portion 37 with respect to the second eccentric hole 55.

[0029] When the first eccentric hole 40 and the second eccentric hole 55 are connected in the same phase to the tamper rotating shaft portion 36, the first tamper edge 38 and the second tamper edge 53 move up and down in the same manner. That is, when the first eccentric hole 40 and the second eccentric hole 55 are in the same phase, the second tamper edge 53 moves up and down so that when the first tamper edge 38 is at the lowest position, the second tamper edge 53 is at the lowest position, and when the first tamper edge 38 is at the highest position, the second tamper edge 53 is at the highest position.

[0030] When the first eccentric hole 40 and the second eccentric hole 55 are connected with respect to the tamper rotating shaft portion 36 in a phase difference of 180 degrees, the first tamper edge 38 and the second tamper edge 53 move up and down alternately. That is, when the first eccentric hole 40 and the second eccentric hole 55 are in a phase difference of 180 degrees, the first tamper edge 38 moves up and down so that the second tamper edge 53 is in the lowest position when the first tamper edge 38 is in the highest position, and the second tamper edge 53 is in the highest position when the first tamper edge 38 is in the lowest position.

[0031] In this embodiment, the first eccentric hole 40 and the second eccentric hole 55 are connected in the same phase to the tamper rotating shaft portion 36. In other words, the first tamper mechanism 35 and the second tamper mechanism 50 move up and down in the same manner to tamp down the paving material.

[0032] The second tamper edge 53 is formed at the lower end of a second arm portion 56 that extends downward from the second tamper rod portion 52. The second arm portion 56 is formed so that the second tamper edge 53 is located in front of the first tamper edge 38.

[0033] The second tamper edge 53 is formed over a predetermined width from the inner surface of the side plate 16. The predetermined width is, for example, 200 mm. The lower surface of the second tamper edge 53 is formed with a second flat portion 53A on the rear side and a second inclined portion 53B on the front side. The lower surface of the second tamper edge 53 is formed with a front upward slope.

[0034] 4 and 5, a space portion 60 is formed in the strike-off plate 30 so that the position of the second tamper edge 53 of the second tamper rod portion 52 matches the shape of the underside of the second tamper edge 53. The space portion 60 is formed by cutting a part of the strike-off plate 30 into an L-shape so as to match the dimensions of the second tamper edge 53, which is formed into a rectangle. The dimension of the second tamper edge 53 in the front-rear direction is formed to be smaller than the dimension of the strike-off plate 30 in the front-rear direction. As a result, the strike-off plate 30 is also disposed in front of the second tamper edge 53.

[0035] The second tamper mechanism 50 is configured so that, when the second tamper edge 53 is at its highest position, the height of the front edge of the second inclined portion 53B is higher than the height of the front edge of the space portion 60 of the strike-off plate 30. The second tamper mechanism 50 is configured so that, when the second tamper edge 53 is at its lowest position, the height of the first flat portion 38A is higher than the height of the front edge of the first inclined portion 38B when the first tamper mechanism 35 is at its highest position.

[0036] [Effect, etc.] The asphalt finisher 1 equipped with the second tamper mechanism 50 is suitable for cases where there is a formwork or structure at the end of the road surface paving area. The structure is, for example, a drainage ditch or the base of a curb. As shown in Fig. 5, when a formwork 61 is installed at the end of the road surface paving area, the compaction of the paving material near the side plate 16 may not be sufficient.

[0037] The paving material in a certain section R1, which is paved at a position away from the formwork 61 at the road surface paving location, has paving material accumulated on the outside of the section R1. Therefore, the paving material is sufficiently compacted by the first tamper mechanism 35 and the screed plate 31. On the other hand, the paving material in the end section R2, which is paved along the formwork 61, does not have a large amount of paving material accumulated on the outside of the end section R2, and generally, the compaction density is likely to decrease, especially in the shoulder portion of the paving material. In this embodiment, the second tamper edge 53 is provided at the right end of the right-side extendable screed 12 and the left end of the left-side extendable screed 12, and the second tamper edge 53 is disposed in front of the first tamper edge 38 and adjacent to the side plate 16. As a result, the paving material in the end section R2 is compacted by the second tamper edge 53 in addition to being compacted by the first tamper edge 38, so that the paving material in the position along the formwork 61 is more compacted.

[0038] In addition, the second tamper edge 53 is disposed at a higher position than the first tamper edge 38. This allows the paving material that has been compacted by the second tamper edge 53 and reduced in thickness to be further compacted by the first tamper edge 38.

[0039] [Effects, etc.] As described above, the asphalt finisher 1 in this embodiment is provided with a screed mechanism 4 consisting of a screed plate 31 that vibrates slightly up and down to spread the paving material, and a first tamper mechanism 35 that is arranged in front of the screed plate 31 and vibrates up and down to compact the paving material, and is provided with second tamper mechanisms 50 that protrude forward with a predetermined width at both ends in the vehicle width direction of a first tamper edge 38 provided on the first tamper mechanism 35, and the second tamper edge 53 of the second tamper mechanism 50 has a lower surface that is formed upward toward the front, allowing the second tamper edge 53 to compact the paving material prior to compacting it with the first tamper edge 38. According to this configuration, the paving material near the structure, formwork, etc. can be poked by the second tamper edge 53 in addition to the first tamper edge 38. Therefore, the compaction density of the paving material near the structure, formwork, etc. can be sufficiently ensured.

[0040] In addition, the height of the rear end edge of the second tamper edge 53 is greater than the height of the front end of the first tamper edge 38 . According to this configuration, the paving material compacted by the second tamper edge 53 can be further compacted by the first tamper edge 38. Therefore, it is possible to ensure a sufficient compaction density of the paving material in the vicinity of the structure, formwork, etc.

[0041] The screed mechanism 4 is provided with a strike-off plate 30 on the front side of the first tamper mechanism 35 which adjusts the amount of paving material supplied, and the strike-off plate 30 is formed with a space portion 60 into which the second tamper edge 53 fits. According to this configuration, by positioning the strike-off plate 30 also in front of the second tamper edge 53, it is possible to adjust the amount of paving material supplied to be compacted by the second tamper mechanism 50.

[0042] (Variation 1) FIG. 6 is a diagram showing a second tamper mechanism 150 according to the first modification. The second tamper mechanism 150 includes a second tamper rotating shaft portion 151, a second tamper rod portion 152, a second tamper edge 53, and a second tamper drive portion (not shown). A second tamper rotating shaft portion 151 that is rotationally driven by a second tamper drive portion is inserted into the second tamper rod portion 152. The second tamper drive portion is a hydraulic motor that receives a supply of hydraulic oil from a hydraulic pump (not shown) and rotates.

[0043] The second tamper edge 53 is formed at the lower end of a second arm portion 156 extending downward from the second tamper rod portion 152. The second arm portion 156 extends in a curved manner rearward from the second tamper rotation shaft portion 151, and the second tamper edge 53 is formed so as to be adjacent to the first tamper edge 38.

[0044] The second tamper rod portion 152 is disposed so that a portion of it protrudes from the cutout portion 32A formed in the deflector plate 32. The cutout portion 32A is formed to match the position of the second tamper rod portion 152. Because the paving material that has passed through the extendable moldboard 14 accumulates on the front side of the deflector plate 32, it is desirable to dispose the second tamper rod portion 152 at a position higher than the height of the paving material.

[0045] The second tamper rotating shaft portion 151 is provided in the second eccentric hole 55 of the second tamper rod portion 152. As a result, the rotational motion of the second tamper rotating shaft portion 151 is converted into the up and down reciprocating motion of the second tamper edge 53 via the second tamper rod portion 152.

[0046] As described above, the first tamper mechanism 35 in variant example 1 comprises a tamper rotating shaft portion 36 and a first tamper rod portion 37 through which the tamper rotating shaft portion 36 is inserted and which vibrates together with the first tamper edge 38, the second tamper mechanism 150 comprises a second tamper rotating shaft portion 151 and a second tamper rod portion 152 through which the second tamper rotating shaft portion 151 is inserted and which vibrates together with the second tamper edge 53, and the screed mechanism 4 comprises a deflector plate 32 that forms the front wall portion, and a cutout portion 32A is formed in the deflector plate 32 so that the second tamper rod portion 152 is facing from the deflector plate 32. According to this configuration, the second tamper mechanism 150 can be added to an existing asphalt finisher that does not include the second tamper mechanism 150, and the asphalt finisher 1 can be easily configured. Furthermore, the notch 32A is spread over the expandable mold board 14 and is formed above the height of the paving material deposited on the front side of the deflector plate 32. Thereby, it is possible to suppress the paving material from accumulating above the strike-off plate 30, the first tamper mechanism 35, the second tamper mechanism 150, and the screed plate 31.

[0047] (Modification 2) FIG. 7 is a view showing the protruding portion according to Modification 2. The first tamper edge 38 according to Modification 2 has a protruding portion 253 welded to the end in the vehicle width direction. The configuration of the lower surface of the protruding portion 253 is the same as the configuration of the second tamper edge 53. The protruding portion 253 corresponds to the second tamper edge 53 located at the tip of the second tamper mechanism 50 in Embodiment 1 and Modification 1. In this modification, the second tamper mechanism is configured only by the protruding portion 253. The protruding portion 253 vibrates up and down together with the first tamper edge 38, and before the paving material is tamped by the first tamper edge 38, the paving material is tamped by the protruding portion 253.

[0048] As described above, the second tamper mechanism is configured as a protruding portion 253 provided on the front side at both ends in the vehicle width direction of the first tamper edge 38, and the rear end edge of the second flat portion 53A on the lower surface of the protruding portion 253 is continuously formed with the front end edge of the first inclined portion 38B on the lower surface of the first tamper edge 38. According to this configuration, the paving material near the structure, formwork, etc. can be tamped by the protruding portion 253 in addition to the first tamper edge 38. Therefore, it is possible to sufficiently ensure the compaction density of the paving material near the structure, formwork, etc. Furthermore, for the first tamper edge 38 of the first tamper mechanism 35 provided in an existing asphalt finisher that does not include the second tamper mechanism, the second tamper mechanism can be configured only by welding the protruding portion 253, and the asphalt finisher 1 can be easily configured.

Explanation of Reference Numerals

[0049] 1. Asphalt finisher 2. Body 3. Hopper 4 Screed mechanism 11 Main screed 12 Extendable screed 13. Vibrator 30 Strike-off Plate 31 Screed plate 32 Deflector plate 32A Cutout 35 First Tamper Mechanism (Tamper Mechanism) 36 Tamper rotating shaft 37 First tamper rod part 38 First Tamper Edge (Tamper Edge) 38A 1st flat section 38B 1st slope part 50 Second Tamper Mechanism 52 Second tamper rod part 53 Second Tampa Edge 53A 2nd flat part 53B 2nd slope part 60 Space Section 61 Formwork R1 Section R2 End Section 150 Second tamper mechanism according to modification 1 151 Second tamper rotating shaft 253 Protrusion

Claims

1. In an asphalt finisher having a screed mechanism composed of a screed plate that vibrates up and down to spread the paving material, and a tamper mechanism that is arranged in front of the screed plate and vibrates up and down to tamper the paving material, A second tamper mechanism is provided at both ends in a vehicle width direction of a first tamper edge provided in the tamper mechanism, the second tamper mechanism protruding forward with a predetermined width, The second tamper edge of the second tamper mechanism has a lower surface formed with a front upward slope, The paving material can be compacted by the second tamper edge prior to compacting the paving material by the first tamper edge; The tamper mechanism includes a tamper rotation shaft portion and a first tamper rod portion through which the tamper rotation shaft portion is inserted and which vibrates together with the first tamper edge, The second tamper mechanism includes a second tamper rotation shaft portion and a second tamper rod portion through which the second tamper rotation shaft portion is inserted and which vibrates together with the second tamper edge, The screed mechanism includes a deflector plate that constitutes a front wall portion, A cutout portion is formed in the deflector plate so as to face the second tamper rod portion from the deflector plate. Asphalt finisher.

2. In an asphalt finisher having a screed mechanism composed of a screed plate that vibrates up and down to spread the paving material, and a tamper mechanism that is arranged in front of the screed plate and vibrates up and down to tamper the paving material, A second tamper mechanism is provided at both ends in a vehicle width direction of a first tamper edge provided in the tamper mechanism, the second tamper mechanism protruding forward with a predetermined width, The second tamper edge of the second tamper mechanism has a lower surface formed with a front upward slope, The paving material can be compacted by the second tamper edge prior to compacting the paving material by the first tamper edge; The second tamper mechanism is configured as a protrusion provided on a front side at both ends of the first tamper edge in a vehicle width direction, The rear end edge of the lower surface of the protrusion is formed continuously with the front end edge of the lower surface of the first tamper edge. Asphalt finisher.

3. In an asphalt finisher having a screed mechanism composed of a screed plate that vibrates up and down to spread the paving material, and a tamper mechanism that is arranged in front of the screed plate and vibrates up and down to tamper the paving material, A second tamper mechanism is provided at both ends in a vehicle width direction of a first tamper edge provided in the tamper mechanism, the second tamper mechanism protruding forward with a predetermined width, The second tamper edge of the second tamper mechanism has a lower surface formed with a front upward slope, The paving material can be compacted by the second tamper edge prior to compacting the paving material by the first tamper edge; The screed mechanism includes a strike-off plate in front of the tamper mechanism for adjusting the amount of paving material supplied, The strike-off plate is formed with a space portion into which the second tamper edge fits. Asphalt finisher.

4. The height of the rear end edge of the second tamper edge is greater than the height of the front end edge of the first tamper edge. An asphalt finisher according to any one of claims 1 to 3.

5. The tamper mechanism includes a tamper rotation shaft portion and a first tamper rod portion through which the tamper rotation shaft portion is inserted and which vibrates together with the first tamper edge, The second tamper mechanism includes a second tamper rod portion through which the tamper rotation shaft portion is inserted and which vibrates together with the second tamper edge. An asphalt finisher as claimed in claim 3.

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