JPH0538007U - Finisher for concrete pavement - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a finisher for concrete paving, which can increase the density of the lower layer portion of the paving material to a desired value. [Structure] A screed (6) for spreading and paving the paving material (10) spread on the paving surface is provided, and the screed (6) is provided.
In a finisher for concrete pavement having a screed vibrator (7) provided therein, a high frequency vibration having a flexible member which is vibrated vertically and rotated separately from the screed (6) in front of the screed (6). A plurality of rotating bodies (11) are provided.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a finisher for concrete pavement, in which hard mixed fresh concrete is spread on a screed and leveled and then compacted by a vibrator.

[0002]

[Prior Art]

 Conventionally, RCCP (Roller Compacting Concrete Pavement) is an extremely hard-mixed (zero slump) fresh mixed concrete, laid with a commonly used asphalt finisher, and then rolled by a vibrating roller to quickly roll it. It is attracting attention as a pavement that can be released. As is well known, in the asphalt finisher, as shown in FIG. 5, while the traveling vehicle body 1 is running, the asphalt mixture fed into the hopper 2 by the dump truck or the like is fed by the bar feeder 3 to the rear of the spreading screw 4. And spread it evenly to the left and right by the rotating action of the spreading screw 4, and the screed 6 provided on the leveling arm 5 spreads it evenly.

[0003]

[Problems to be solved by the device]

 However, in the paving of the fresh concrete, when the paving thickness exceeds 20 cm, the density of the lower layer portion of the paved paving material is not as consolidated as the density of the upper layer portion, and therefore the weight of the screed 6 is reduced. To increase the density of the lower layer of the paving material by increasing the vibration resistance of the screed vibrator 7 shown in FIG. 4 or by tampering with the tamper device 8 in front of the screed 6. It corresponds. In FIG. 4, 9 is a deflector plate, 10 is green concrete (paving material), and arrow A is the direction of travel of the asphalt finisher. However, the effect of increasing the density of the pavement material lower layer portion by this method is difficult to exert on the pavement material lower layer portion when the pavement material pavement thickness exceeds 25 cm, and the roller compacting concrete pavement finisher ( The development of concrete finisher finishers) was awaited.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a finisher for concrete paving which can increase the density of the lower layer portion of the paving material to a desired value.

[0005]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the present invention provides a concrete pavement finisher in which a screed for spreading and hardening the paving material spread on the pavement surface is provided, and a screed vibrator is provided in the screed, in front of the screed. Separately from the screed, a plurality of high-frequency vibrating rotating bodies having flexible members that are vertically vibrated and rotated are provided.

[0006]

[Action]

 According to the above configuration, the flexible member of the high-frequency vibration rotator vibrates in the axial direction and rotates due to the operation of the high-frequency vibration rotator, whereby the pavement material is loosened well in front of the screed, The vertical vibration of the screed works efficiently for the compaction of the pavement material lower layer, and even if the pavement material pavement thickness exceeds 25 cm, the screed sufficiently compacts the pavement material to the lower layer of the pavement material, The density of the lower layer of paving material is close to the density of the upper layer.

[0007]

【Example】

 An embodiment of the present invention will be described below with reference to FIGS. In this embodiment, the same parts as those of the conventional example are designated by the same reference numerals, and detailed description thereof will be omitted. In the present invention, a plurality of high-frequency vibration rotors 11 are provided in front of the screed 6, and the operation of the high-frequency vibration rotors 11 increases the density of the pavement material lower layer portion. As shown in FIG. 1, a base end portion of a cylinder mechanism 12 which is directed upward and downward is rotatably attached to a predetermined fixing portion of the concrete paving finisher. The high-frequency vibrating rotor 11 is rotatably connected to the end of the rod 13 on the tip side of the cylinder mechanism 12.

The high-frequency vibrating rotor 11 is configured as shown in FIGS. 2 and 3. In FIG. 3, 14 is a cylindrical main body having flanges at both ends, and a hydraulic motor 15 is attached to one end of the main body 14. A spline shaft 16 is coaxially connected to the rotary shaft of the hydraulic motor 15, and the spline shaft 16 is inserted into the main body 14. Inside the main body 14, a stepped cylindrical vibration generator 17 having a flange 17a in the center is provided rotatably and axially movable. The collar 17a is inclined with respect to the axis of the vibration generator 17. A hole is formed at one end of the vibration generator 17, and a spline groove 18 that fits into the spline shaft 16 is provided on the inner peripheral surface of the hole.

An eccentric shaft 19 is provided at the other end of the vibration generator 17 so as to be eccentric in parallel with the axis of the vibration generator 17. A stainless rope 20 is attached to the eccentric shaft 19, and a cup-shaped tip fixing metal fitting 21 is fixed to the tip of the stainless rope 20 as shown in FIG. Further, a vibration attachment 22 composed of a hollow spindle shown in FIG. 2 is attached to the front end side portion of the stainless rope 20 so as to cover the tip fixing metal fitting 21.

On the other hand, on one side of the outer peripheral wall of the main body 14, the roller shafts 23, 23 are located on a straight line parallel to the axis of the vibration generator 17 and are spaced apart from each other by a predetermined distance. It is pierced and rotatably mounted. These roller shafts 23, 23 are orthogonal to the axis of the vibration generator 17. In the main body 14, a pair of rollers (cam followers) 24, 24 attached to the respective tip ends of the roller shafts 23, 23 are provided equidistantly from the axis of the vibration generator 17.

The vibrating body 17 has a flange 17 a inserted between the pair of rollers 24, 24, and the spline shaft 16 is fitted into the spline groove 18 with the flange 17 a being in contact with the pair of rollers 24, 24. And is rotatably and axially movable in the main body 14 via the bearings 25, 25 as described above. Therefore, when the rotary shaft of the hydraulic motor 15 rotates, the vibration generator 17 reciprocates in the axial direction by the maximum displacement amount of the outer periphery of the collar 17a, that is, the stroke S shown in FIG. In FIG. 3, reference numeral 26 denotes a cover, and a denotes the amount of eccentricity of the eccentric shaft 19 with respect to the axis of the vibration generator 17.

Further, as shown in FIG. 2, one end of a bell crank type mounting member 27 is fixedly attached to the side wall of the main body 14 of the high frequency vibration rotating body 11. The other end of the mounting member 27 is rotatably mounted on the end of the rod 13 of the cylinder mechanism 12. The central portion of the mounting member 27 is rotatably mounted on a horizontal fulcrum shaft 28 provided at a predetermined fixed portion of the concrete paving finisher. As shown in FIG. 1, the high-frequency vibration rotor 11 is slightly inclined with respect to the vertical direction, and is placed between the deflector plate 9 in front of the screed 6 and the spreading screw 4 so that the finisher for concrete paving is installed. A plurality of them are provided in the direction orthogonal to the traveling direction. Therefore, when the cylinder mechanism 12 expands and contracts, the mounting member 27 rotates about the fulcrum shaft 28, and the high-frequency vibrating rotor 11 moves substantially up and down in front of the screed 6.

Therefore, in the concrete pavement finisher having the above-described structure, the high-frequency vibration rotor 11 is activated, and the screed vibrator 7 is activated to vertically vibrate the screed plate 6a at the lower end of the screed 6 at the same time. The tamper device 8 is operated to spread and pave the paving material with a predetermined pressure. In this case, when the hydraulic motor 15 of the high-frequency vibration rotor 11 is driven, the vibration generator 17 rotates and vibrates in its axial direction. With the rotation and vibration of the vibration generator 17, the vibration attachment 22 and the tip fixing metal fitting 21 are swung together with the flexible stainless steel rope 20 and vibrated in the length direction.

When the cylinder mechanism 12 shown in FIG. 1 is expanded / contracted, the mounting member 27 rotates about the fulcrum shaft 28, and the high-frequency vibration rotator 11 moves up and down through the mounting member 27. .

The vertical movement of the high-frequency vibration rotating body 11 and the rotation and vibration of the stainless steel rope 20, the vibration attachment 22, and the tip fixing metal fitting 21 loosen the paving material well in front of the screed 6. For compaction of the lower layer of material, tamping by the tamper device 8 described above, and vertical vibration of the screed plate 6a by the screed vibrator 7 work efficiently, and even if the paving material paving thickness exceeds 25 cm, the tamper device 8, screed 6 The compacting action of the paving material due to the pavement material reaches the lower layer of the paving material sufficiently, and the density of the lower layer of the paving material becomes almost the same as that of the upper layer.

Further, there is no upward / downward movement of the high-frequency vibration rotator 11 itself due to the expansion / contraction operation of the cylinder mechanism 12, and only the rotation and vibration of the stainless steel rope 20, the vibration attachment 22, and the tip fixing metal fitting 21 cause the front of the screed 6. Since the paving material is well unraveled in the pallet, the tampering by the tamper device 8 and the vertical vibration of the screed plate 6a by the screed vibrator 7 work efficiently against the compaction of the lower layer of the paving material, and the density of the lower layer of the paving material Is close to the density of the upper layer.

Although the tamper device 8 is provided in front of the screed 6 in the above-described embodiment, even if the tamper device 8 is not provided, the lower layer of the paving material can be operated by the action of the high-frequency vibration rotor 11. The density of the part is close to the density of the upper layer.

[0018]

[Effect of the device]

 According to the present invention, a screed for spreading and spreading the paving material spread on the paved surface is provided, and in a concrete pavement finisher in which a screed vibrator is provided on the screed, in front of the screed, separately from the screed, Since a plurality of high-frequency vibration rotators having flexible members that are vertically vibrated and rotated are provided, the paving material is well loosened in front of the screed by the operation of the high-frequency vibration rotator. Even if the pavement material has a pavement thickness of more than 25 cm, the vertical vibration of the screed by the screed vibrator works efficiently for compacting the lower layer of the pavement material, and the density of the lower layer of the pavement material is close to that of the upper layer. It can be a desired value.

[Brief description of drawings]

FIG. 1 is a sectional view of an essential part showing an embodiment of the present invention.

FIG. 2 is a side sectional view of an essential part of the high-frequency vibration rotator of the present invention.

FIG. 3 is a side sectional view of a main part of the high-frequency vibration rotator of the present invention.

FIG. 4 is a side sectional view of a main part showing an example of a conventional finisher for concrete paving.

FIG. 5 is a schematic side view showing an example of a conventional asphalt finisher.

[Explanation of symbols]

 6 Screed 7 Screed vibrator 10 Fresh concrete (paving material) 11 High-frequency vibration rotor

Claims (1)

[Scope of utility model registration request] 1. A concrete pavement finisher in which a screed for spreading and spreading the pavement material spread on a pavement surface is provided, and a screed vibrator is provided in the screed, in front of the screed, separately from the screed, A finisher for concrete paving, comprising a plurality of high-frequency vibrating rotating bodies having flexible members that are vibrated and rotated.