Concrete finisher and concrete pavement construction method

Abstract

To provide a concrete finisher and a concrete pavement construction method which improve the accuracy of the leveling height of ready mixed concrete.SOLUTION: A concrete finisher 100 comprises: a main body 120 moving on a pair of formworks 110 arranged at a construction site of a concrete pavement; a screed plate 130 attached to the main body 120; a vibrator 140 attached to the screed plate 130; and a height regulation member 160 regulating the standards of the leveling height of ready mixed concrete. The height regulation member 160 includes: a long and rectangular first plate member; and a long and rectangular second plate member rising vertically from the first plate member. Then, the first plate member is arranged in parallel to a lower face of the screed plate 130, and the second plate member is fixed to a position where a front end face of the first plate member is visible when viewed from the front in the movement direction of the main body 120.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a concrete finisher and a method for constructing a concrete pavement. [Background technology]

[0002] A simple concrete finisher, such as that described in JP 2009-35900 A (Patent Document 1), is known as a machine for constructing concrete pavement. The simple concrete finisher has a main body that moves on a pair of formworks arranged parallel to the construction site of the concrete pavement, a screed plate attached to a predetermined location on the main body, and a vibrator attached to the screed. The concrete finisher moves while spreading ready-mixed concrete (hereinafter abbreviated as "fresh concrete") in front of the screed plate, and the screed plate compacts the fresh concrete with the vibrator activated. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2009-35900 Summary of the Invention [Problem to be solved by the invention]

[0004] The ready-mixed concrete spread in front of the screed plate must be spread to a predetermined thickness, for example, to obtain a required load-bearing capacity. To this end, a square steel pipe extending in the left-right direction is placed in front of the screed plate, and the worker spreads the ready-mixed concrete using, for example, a paving rake, using its underside as a reference for the spreading height. However, if the front of the square steel pipe is covered with ready-mixed concrete, the worker cannot see the underside of the square steel pipe, making it difficult to spread the ready-mixed concrete to the predetermined height.

[0005] Therefore, an object of the present invention is to provide a concrete finisher and a concrete pavement construction method that can improve the accuracy of the leveling height of ready-mixed concrete. [Means for solving the problem]

[0006] The concrete finisher includes a main body that moves on a pair of formworks arranged parallel to the construction site of the concrete pavement, a screed plate attached to a predetermined location on the main body, at least one vibrator attached to the screed plate, and a height determining member that is arranged in front of the screed plate in the direction of movement of the main body and determines the standard for the leveling height of the fresh concrete. The height determining member includes a first plate member that is elongated and rectangular, and a second plate member that stands perpendicular to the first plate member, also elongated and rectangular. The first plate member is arranged parallel to the underside of the screed plate, and the second plate member is fixed in a position where the front end face of the first plate member is visible when viewed from the front in the direction of movement of the main body.

[0007] In the concrete pavement construction method, when constructing concrete pavement using the above-mentioned concrete finisher, the fresh concrete is spread evenly using the top surface of the first plate member of the height-regulating member as a reference, while the concrete finisher is moved and the vibrator is activated to compact the fresh concrete with the screed plate. [Effects of the Invention]

[0008] According to the present invention, the accuracy of the leveling height of ready-mixed concrete can be improved in a concrete finisher and a concrete pavement construction method. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is a perspective view showing an example of a concrete finisher. [Figure 2] FIG. 1 is a plan view showing an example of a concrete finisher. [Figure 3] 3 is a cross-sectional view taken along the line AA in FIG. 2. [Figure 4] 3 is a cross-sectional view of FIG. 2 taken along line B-B. [Figure 5] FIG. 1 is an explanatory diagram of the first step of constructing a concrete pavement. [Figure 6] FIG. 10 is an explanatory diagram of the second step of constructing a concrete pavement. [Figure 7] FIG. 10 is an explanatory diagram of the third step of constructing a concrete pavement. [Figure 8] FIG. 10 is an explanatory diagram of the fourth step of constructing a concrete pavement. [Figure 9] FIG. 10 is a cross-sectional view showing a modified example of the height regulating member. [Figure 10] FIG. 10 is a cross-sectional view showing another example of the height defining member. [Figure 11] FIG. 10 is a cross-sectional view showing another example of the height defining member. [Figure 12] FIG. 10 is a cross-sectional view showing another example of the height defining member. DETAILED DESCRIPTION OF THE INVENTION

[0010] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. 1 to 4 show an example of a concrete finisher 100 to which this embodiment can be applied. Note that the concrete finisher 100 described below is merely an example to which this embodiment can be applied, and should not be construed as being limited to this configuration. Therefore, it goes without saying that a person skilled in the art can make any changes and modifications within the technical scope of this embodiment.

[0011] The concrete finisher 100 comprises a main body 120 that moves on a pair of formworks 110 arranged parallel to the construction site of the concrete pavement, a screed plate 130 attached to a predetermined location on the main body 120, a vibrator 140 that is attached to a predetermined location on the screed plate 130 and applies vibrations to the screed plate 130, a pair of traction winches 150 attached to predetermined locations on the main body 120, and a height regulating member 160 that is arranged in front of the screed plate 130 in the direction of movement of the main body 120. Here, the front in the direction of movement of the main body 120 is defined as "front", and the rear thereof is defined as "rear", and the right side based on the direction of movement of the main body 120 is defined as "right", and the left side thereof is defined as "left".

[0012] The main body 120 is composed of a box-shaped member having a substantially rectangular parallelepiped shape with an open top. A counterweight (not shown) may be placed inside the box-shaped member of the main body 120 to ensure a reaction force when constructing concrete pavement. The length of the main body 120 in the front-to-rear direction is preferably set to a length that does not affect the finishing accuracy of the fresh concrete due to the compaction work of the fresh concrete by the screed plate 130 placed in front of it, and is, for example, 50 to 60 cm or more. First columnar members 122 made of angle steel (equal leg angle steel) are respectively erected on the inside front surface of the left and right ends of the main body 120. The outer bottom surface 120A of the main body 120 is formed into a flat and smooth plane, which allows the fresh concrete to be finished evenly.

[0013] The screed plate 130 is composed of a box-shaped member with a generally rectangular parallelepiped shape and an open top, extending in a left-right direction perpendicular to the movement direction of the main body 120. Bases 132, each consisting of a pair of angle irons, are attached to the left and right sides of the inner bottom surface of the screed plate 130. The pair of angle irons on the bases 132 are connected via vibration-isolating rubber 134. Materials used for the vibration-isolating rubber 134 include, for example, natural rubber, styrene-butadiene rubber, and chloroprene rubber. The vibration-isolating rubber 134 prevents vibrations applied to the screed plate 130 from being transmitted to the main body 120, while facilitating the transmission of the vibration load from the vibrator 140 to the fresh concrete. This, combined with the pressing function of the screed plate 130, allows the fresh concrete to be flattened and sufficiently compacted, thereby improving the finishing accuracy of the fresh concrete.

[0014] A second columnar member 136 made of a square steel pipe is erected on the upper surface of each base 132, for example, by bolting. The first columnar member 122 and the second columnar member 136 are connected near their upper portions by a connecting member 138. The end 138A of the connecting member 138, which is connected to the first columnar member 122, is attached to the first columnar member 122 via a fastener such as a vice or bolt, thereby allowing the screed plate 130 to move up and down relative to the main body 120. Therefore, by changing the relative height position of the screed plate 130 with respect to the main body 120, the screed plate 130 can be positioned according to the finished height of the ready-mixed concrete. Typically, for example, taking into account the overfill, the outer bottom surface 130A of the screed plate 130 is adjusted to be approximately 10 mm higher than the outer bottom surface 120A of the main body 120.

[0015] Furthermore, the front portion of the outer bottom surface 130A of the screed plate 130, i.e., a portion of a predetermined length located forward in the direction of movement of the concrete finisher 100, is formed into a tapered surface 130B that gradually becomes higher toward the front, as shown in Fig. 4. Therefore, when the screed plate 130 compacts the fresh concrete, the fresh concrete in front of the screed plate 130 is easily introduced to the outer bottom surface 130A of the screed plate 130. The fresh concrete introduced to the outer bottom surface 130A of the screed plate 130 is then compacted by the screed plate 130 to which vibrations are applied from the vibrator 140, and is then introduced to the outer bottom surface 120A of the main body 120 and finished.

[0016] The vibrator 140 is attached to approximately the center in the longitudinal direction of the screed plate 130. Here, the frequency of the vibrations applied from the vibrator 140 to the screed plate 130 is preferably, for example, 100 to 400 Hz, and in this embodiment, a vibrator is employed that can arbitrarily change the frequency depending on the state of the fresh concrete. Note that the configuration of the vibrator 140 is not limited to one attached to approximately the center in the longitudinal direction of the screed plate 130, as long as at least one is attached along the entire length of the screed plate 130.

[0017] Manual traction winches 150 are attached to the top surfaces of the left and right outer sides of the main body 120 via brackets 152 that are L-shaped in side view. A pair of anchors ANC on the left and right sides are fixed to predetermined locations on the concrete pavement construction site located forward in the direction of movement of the concrete finisher 100. The tips of wire ropes 150A wound around each traction winch 150 are connected to the anchors ANC fixed on the left and right sides of the concrete pavement construction site. Therefore, by two workers rotating the handles 150B of the pair of traction winches 150 in a balanced manner, the wire ropes 150A are wound around the traction winches 150, and the concrete finisher 100 can move over the pair of formworks 110.

[0018] The height regulating member 160 is a member that determines the standard for the leveling height of ready-mixed concrete, and is arranged in front of and parallel to the screed plate 130, for example, in a state where an H-shaped steel is rotated 90 degrees, i.e., in a state where it is shaped like the letter "H" in side view. Specifically, the height regulating member 160 is arranged over the entire length of the screed plate 130, and is attached to the plate member that forms the front surface thereof via a bracket 162 of any shape. Here, the height regulating member 160 is arranged so that its bottom surface 160A, i.e., the bottom surface of the plate member that forms the base of the letter "H" shape, is at the same height as the outer bottom surface 130A of the screed plate 130.

[0019] Therefore, the height regulating member 160 is disposed integrally with the screed plate 130 and is movable up and down relative to the main body 120. For this reason, if the vertical position of the screed plate 130 relative to the main body 120 is changed without changing the relative vertical positions of the screed plate 130 and the height regulating member 160, the vertical position of the height regulating member 160 can be changed at the same time. This makes it easy to accommodate concrete pavements of various thicknesses.

[0020] Next, we will explain a method for constructing concrete pavement using the concrete finisher 100. Note that, as a prerequisite for constructing concrete pavement, a pair of formworks 110 extending parallel to the construction location is placed, and a pair of anchors ANC is fixed to the construction location.

[0021] In the first step, as shown in Fig. 5, a worker uses, for example, heavy machinery to place the concrete finisher 100 at the position where concrete paving will begin. Then, the worker pays out the wire rope 150A wound around the traction winch 150 and connects its tip to the anchor ANC.

[0022] In the second step, as shown in FIG. 6, a worker spreads and levels the ready-mixed concrete CR supplied in front of the concrete finisher 100, using, for example, a paving rake. As shown in the figure, the worker sets the height reference RH at the top end of the front surface of the plate member located below the height determining member 160, i.e., the plate member corresponding to the bottom edge of the letter "H" shape, and spreads and levels the ready-mixed concrete CR to a height where this reference RH can be seen. If the ready-mixed concrete CR is spread and leveled beyond the height reference RH of the height determining member 160, the worker simply scrapes out the ready-mixed concrete CR from the recess in front of the height determining member 160 until the height reference RH can be seen. This allows the height of the ready-mixed concrete CR spread and leveled in front of the concrete finisher 100 to be approximately constant.

[0023] In the third step, while a worker spreads and levels the ready-mixed concrete CR supplied in front of the concrete finisher 100, two other workers rotate the handles 150B of the towing winches 150 at an appropriate speed in a balanced manner, as shown in FIG. 7, to move the concrete finisher 100 forward. As the concrete finisher 100 moves forward, the height determining member 160 attached to the front of the screed plate 130 by a bracket 162 moves forward together with the concrete finisher 100. The ready-mixed concrete CR then slides under the bottom surface 160A of the height determining member 160, which is located a predetermined distance above the outer bottom surface 120A of the main body 120, and is supplied to the screed plate 130 located behind it. At this time, the ready-mixed concrete CR in front of the height determining member 160 is scraped by the front surface of the plate member located below the height determining member 160, causing it to rise as shown in the same figure.

[0024] Furthermore, the ready-mixed concrete CR supplied to the screed plate 130 is directed toward the outer bottom surface 130A by its tapered surface 130B. The screed plate 130, to which vibrations are imparted by the vibrator 140, vibrates up and down because it is attached to the main body 120 via vibration-isolating rubber 134, and the outer bottom surface 130A compacts the ready-mixed concrete to approximately the same height as the outer bottom surface 120A of the main body 120. The ready-mixed concrete CR is then supplied to the main body 120, and is finished flat by the outer bottom surface 120A. The supply of ready-mixed concrete CR to the front of the concrete finisher 100 continues until the construction of the concrete pavement is completed.

[0025] In the fourth step, as shown in FIG. 8, a worker uses a paving rake to scrape out the piled-up ready-mixed concrete CR in front of the height-regulating member 160, mixes it with the ready-mixed concrete supplied in front of it, and spreads it evenly until the height reference RH becomes visible.

[0026] The concrete pavement is constructed by sequentially repeating the first to fourth steps described above. Then, when the position where the concrete pavement is to be completed is reached, the supply of ready-mixed concrete CR ahead of the concrete finisher 100 is stopped, and the concrete finisher 100 is moved to that position to complete the construction of the concrete pavement. After that, the worker releases the connection of the wire rope 150A from the anchor ANC, rotates the handle 150B of the towing winch 150 to reel in the wire rope 150A, and removes the concrete finisher 100 using heavy machinery or the like.

[0027] In short, in the concrete pavement construction method, the ready-mixed concrete is spread evenly using the top surface of the plate member placed below the height-regulating member 160 as a reference, while the concrete finisher 100 is moved and the vibrator 140 is activated to compact the ready-mixed concrete with the screed plate 130.

[0028] In this way, the worker can spread the ready-mixed concrete CR while visually checking the height reference RH of the height regulating member 160 having an E-shaped cross section. Therefore, the height of the ready-mixed concrete CR spread and leveled in front of the concrete finisher 100 becomes approximately constant, while the worker can easily spread and level the ready-mixed concrete CR, thereby improving the quality of the concrete pavement.

[0029] 9, the bottom surface 160A located in front of the height regulating member 160 may be formed into a tapered surface 160B that gradually becomes higher toward the front. In this way, the ready-mixed concrete spread evenly in front of the height regulating member 160 is received by the tapered surface 160B of the height regulating member 160 and supplied to the bottom surface 160A. This allows the ready-mixed concrete to be supplied smoothly to the bottom surface 160A of the height regulating member 160.

[0030] The height regulating member 160 is not limited to an "E"-shaped member obtained by rotating an H-shaped steel by 90 degrees, but may also be made of a T-shaped steel rotated by 180 degrees as shown in Fig. 10, an angle steel as shown in Fig. 11, or a channel steel as shown in Fig. 12. In short, the height regulating member 160 includes a first plate member having an elongated rectangular shape and a second plate member having an elongated rectangular shape that stands perpendicularly from the first plate member, and it is sufficient that the first plate member is arranged parallel to the outer bottom surface 130A of the screed plate 130, and the second plate member is fixed in a position where the front end surface of the first plate member is visible when viewed from the front in the direction of movement of the main body 120.

[0031] Furthermore, the concrete finisher 100 excluding the height regulating member 160 is not limited to the configuration described above, and may be, for example, Hawk Ice Creed sold by Machine Care Tech Co., Ltd. or the simple concrete finisher FKSS-8000 sold by Fujisaki Shokai Co., Ltd.

[0032] Furthermore, a person skilled in the art will easily understand that new embodiments can be created by omitting parts of the technical ideas of the above embodiments, combining parts as appropriate, or replacing parts with well-known technology.

[0033] For example, the vibrator 140 may be attached to the height determining member 160 instead of the screed plate 130. Furthermore, the towing winch 150 may be attached to the height determining member 160 instead of the main body 120. [Explanation of symbols]

[0034] 100...Concrete finisher 110...Formwork 120...Main unit 130...Screed plate 140...Vibrator 160...Height regulation member 160B...Tapered surface CR...ready mixed concrete RH...height reference

Claims

1. A main body that moves on a pair of formworks that are arranged parallel to the construction site of the concrete pavement; A screed plate attached to a predetermined location on the main body; at least one vibrator attached to the screed plate; a height determining member disposed in front of the screed plate in the moving direction of the main body and determining a standard for the leveling height of the ready-mixed concrete; and the height defining member includes a first plate member having an elongated rectangular shape and a second plate member having an elongated rectangular shape and standing vertically from the first plate member; The first plate member is arranged parallel to the lower surface of the screed plate, the second plate member is fixed at a position where a front end surface of the first plate member is visible when viewed from the front in the moving direction of the main body; Concrete finisher.

2. The height determining member is arranged parallel to the screed plate over the entire length of the screed plate, 2. The concrete finisher of claim 1.

3. The height defining member is composed of any one of H-shaped steel, T-shaped steel, angle steel, and channel steel.

2. The concrete finisher of claim 1.

4. The screed plate and the height determining member are integrally arranged so as to be movable in the vertical direction relative to the main body.

2. The concrete finisher of claim 1.

5. a bottom surface of the height determining member located in front of the first plate member formed into a tapered surface that gradually becomes higher toward the front; 2. The concrete finisher of claim 1.

6. When constructing a concrete pavement using the concrete finisher according to any one of claims 1 to 5, the ready-mixed concrete is spread evenly using the upper surface of the first plate member of the height-defining member as a reference, while the concrete finisher is moved and the vibrator is operated to compact the ready-mixed concrete with the screed plate. How to construct concrete pavements.

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