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 simplified concrete finisher as described in JP 2009-35900 A (Patent Document 1) is known as a machine for constructing concrete pavement. The simplified concrete finisher has a main body that moves on a pair of forms arranged in parallel at the construction site of the concrete pavement, a screed plate attached to a predetermined location of the main body, and a vibrator attached to the screed. Ready mixed concrete (hereinafter abbreviated as "fresh concrete") is spread evenly in front of the screed plate while the concrete finisher is moved, and the fresh concrete is compacted by the screed plate with the vibrator operating. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2009-35900 A 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 in order to obtain a required load-bearing capacity. For this reason, a square steel pipe extending in the left-right direction is placed in front of the screed plate, and the bottom surface of the pipe is used as a reference for the spreading height, and a worker spreads the ready-mixed concrete using, for example, a paving rake. However, when the front surface of the square steel pipe is covered with ready-mixed concrete, the worker cannot see the bottom surface of the square steel pipe, making it difficult to spread the ready-mixed concrete to a 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 has a main body that moves on a pair of forms arranged parallel to the construction site of the concrete pavement, a screed plate attached to a predetermined position of the main body, at least one vibrator attached to the screed plate, and a height regulation member that is arranged in front of the screed plate in the moving direction of the main body and regulates the standard of the spreading height of the fresh concrete. The height regulation member includes a first plate member having an elongated rectangular shape and a second plate member having an elongated rectangular shape that rises vertically from the first plate member. The first plate member is arranged parallel to the lower surface of the screed plate, and the second plate member is fixed at a position where the front end surface of the first plate member is visible when viewed from the front in the moving direction of the main body.

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

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

[0009] [Figure 1] FIG. 1 is a perspective view showing an example of a concrete finisher. [Diagram 2] FIG. 2 is a plan view showing an example of a concrete finisher. [Diagram 3] 3 is a cross-sectional view taken along the line AA in FIG. 2. [Figure 4] 3 is a cross-sectional view taken along line BB in FIG. 2. [Diagram 5] FIG. 2 is an explanatory diagram of the first step of constructing a concrete pavement. [Figure 6] FIG. 11 is an explanatory diagram of the second step of constructing a concrete pavement. [Figure 7] FIG. 11 is an explanatory diagram of the third step of constructing a concrete pavement. [Figure 8] FIG. 11 is an explanatory diagram of the fourth step of constructing a concrete pavement. [Figure 9] 13 is a cross-sectional view showing a modified example of the height defining member. FIG. [Figure 10] 13 is a cross-sectional view showing another example of the height defining member. FIG. [Figure 11] 13 is a cross-sectional view showing another example of the height defining member. FIG. [Figure 12] 13 is a cross-sectional view showing another example of the height defining member. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[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 arbitrarily change and modify the present embodiment within the technical scope.

[0011] The concrete finisher 100 includes a main body 120 that moves over a pair of formworks 110 arranged parallel to the construction site of the concrete pavement, a screed plate 130 attached to a predetermined position of the main body 120, a vibrator 140 attached to a predetermined position of the screed plate 130 to impart vibration to the screed plate 130, a pair of traction winches 150 attached to a predetermined position of the main body 120, and a height regulating member 160 arranged in front of the screed plate 130 in the moving direction of the main body 120. Here, the front in the moving direction of the main body 120 is defined as "front", the rear as "rear", the right side with reference to the moving direction of the main body 120 as "right", and the left side as "left".

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

[0013] The screed plate 130 is composed of a box-shaped member having a substantially rectangular parallelepiped shape with an open top, extending in the left-right direction perpendicular to the moving direction of the main body 120. A pair of angle steel bases 132 are attached to the left and right sides of the inner bottom surface of the screed plate 130. The pair of angle steels in the base 132 are connected via vibration-proof rubber 134. The material used for the vibration-proof rubber 134 may be, for example, natural rubber, styrene butadiene rubber, or chloroprene rubber. The vibration-proof rubber 134 makes it difficult for the vibration applied to the screed plate 130 from the vibrator 140 to be transmitted to the main body 120, while making it easy for the vibration load from the vibrator 140 to be transmitted to the fresh concrete. Therefore, in combination with the pressing function of the screed plate 130, the fresh concrete can 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 bolt fastening. The first columnar member 122 and the second columnar member 136 are connected to each other near the upper part by a connecting member 138. The end portion 138A of the connecting member 138 connected to the first columnar member 122 is attached to the first columnar member 122 via a fastener such as a vice or a bolt, thereby making the screed plate 130 movable in the vertical direction relative to the main body 120. Therefore, by changing the relative position of the screed plate 130 in the height direction relative to the main body 120, the screed plate 130 can be positioned according to the finished height of the fresh concrete. Usually, for example, the outer bottom surface 130A of the screed plate 130 is adjusted to be about 10 mm higher than the outer bottom surface 120A of the main body 120, taking into account the overfill.

[0015] In addition, the front part of the outer bottom surface 130A of the screed plate 130, i.e., a portion of a predetermined length located forward in the moving direction 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 fresh concrete is compacted by the screed plate 130, 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 vibration is applied from the vibrator 140, and is then introduced to the outer bottom surface 120A of the main body 120 for finishing.

[0016] The vibrator 140 is attached to the screed plate 130 at approximately the center in the longitudinal direction. Here, the frequency of the vibration applied from the vibrator 140 to the screed plate 130 is preferably, for example, 100 to 400 Hz, and in this embodiment, a vibrator capable of arbitrarily changing the frequency according to the state of the fresh concrete is adopted. Note that the vibrator 140 is not limited to a configuration in which one vibrator 140 is attached to the screed plate 130 at approximately the center in the longitudinal direction, but at least one vibrator 140 may be attached according to the entire length of the screed plate 130.

[0017] A manual traction winch 150 is attached to the upper surface of each of the left and right outer sides of the main body 120 via brackets 152 that are L-shaped in a side view. A pair of left and right anchors ANC are fixed to predetermined locations of the concrete pavement construction site located forward in the moving direction of the concrete finisher 100. The tip of the wire rope 150A wound around each traction winch 150 is connected to the anchors ANC fixed to the left and right 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 rope 150A is wound around the traction winch 150, and the concrete finisher 100 can move over the pair of forms 110.

[0018] The height regulating member 160 is a member that regulates the standard of the spreading height of the 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°, i.e., in a state where it is in an E-shape in a 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 constitutes 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 constitutes the base of the E-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 so as to be movable up and down relative to the main body 120. For this reason, if the up-down position of the screed plate 130 relative to the main body 120 is changed without changing the relative up-down positions of the screed plate 130 and the height regulating member 160, the up-down position of the height regulating member 160 can be changed at the same time accordingly. This makes it possible to easily accommodate concrete pavements having a variety of thicknesses.

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

[0021] In the first step, as shown in Fig. 5, a worker places the concrete finisher 100 at a position where the concrete paving is to start, for example, by using heavy machinery. Then, the worker pays out the wire rope 150A wound around the towing winch 150, and connects the tip of the wire rope 150A to the anchor ANC.

[0022] In the second step, as shown in FIG. 6, a worker spreads the ready-mixed concrete CR supplied in front of the concrete finisher 100 using, for example, a paving rake. At this time, as shown in the figure, the worker sets the upper end of the front surface of the plate member located at the bottom of the height regulating member 160, i.e., the plate member corresponding to the lower side of the letter "E" shape, as the height reference RH, and spreads the ready-mixed concrete CR to a height where this can be seen. Here, if the ready-mixed concrete CR is spread and leveled beyond the height reference RH of the height regulating member 160, the worker may scrape out the ready-mixed concrete CR from the recess in front of the height regulating member 160 until the height reference RH can be seen. In this way, the height of the ready-mixed concrete CR spread and leveled in front of the concrete finisher 100 can be made approximately constant.

[0023] In the third step, while the worker spreads the ready-mixed concrete CR supplied in front of the concrete finisher 100 evenly, the other two workers rotate the handle 150B of the towing winch 150 at an appropriate speed in a balanced manner, as shown in FIG. 7, to move the concrete finisher 100 forward. When the concrete finisher 100 moves forward, the height regulation member 160 attached to the front of the screed plate 130 by the bracket 162 moves forward together with the concrete finisher 100. Then, the ready-mixed concrete CR slips under the bottom surface 160A of the height regulation member 160, which is located a predetermined dimension 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 regulation member 160 is scraped by the front surface of the plate member located below the height regulation member 160, and rises up as shown in the figure.

[0024] The ready-mixed concrete CR supplied to the screed plate 130 is directed toward the outer bottom surface 130A by the tapered surface 130B. The screed plate 130 to which vibration is applied by the vibrator 140 is attached to the main body 120 via vibration-proof rubber 134, so it vibrates up and down, 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 to a flat surface 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 can be seen with the naked eye.

[0026] The above-described first to fourth steps are repeated in sequence to construct the concrete pavement. Then, when the position where the concrete pavement is to be completed is reached, the supply of ready-mix concrete CR to the front 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 to the anchor ANC, rotates the handle 150B of the towing winch 150 to wind up 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 fresh concrete is spread evenly using the upper 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 operated to compact the fresh concrete with the screed plate 130.

[0028] In this way, the worker can spread the ready-mixed concrete CR evenly while visually checking the height reference RH of the height regulating member 160 having an E-shaped cross section. Therefore, while facilitating the worker's work of spreading the ready-mixed concrete CR, the height of the ready-mixed concrete CR spread evenly in front of the concrete finisher 100 becomes approximately constant, and the quality of the concrete pavement can be improved.

[0029] 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, as shown in Fig. 9. 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 to the bottom surface 160A of the height regulating member 160 smoothly.

[0030] The height regulating member 160 is not limited to an E-shaped member obtained by rotating an H-shaped steel by 90°, but may be a T-shaped steel rotated by 180° 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 standing vertically from the first plate member, and the first plate member is disposed parallel to the outer bottom surface 130A of the screed plate 130, and the second plate member is fixed at a position where the front end surface of the first plate member is visible when viewed from the front in the moving direction 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 of the embodiments as appropriate, or replacing parts of the embodiments with well-known technology.

[0033] For example, the vibrator 140 may be attached to the height determining member 160, not limited to the screed plate 130. Also, the towing winch 150 may be attached to the height determining member 160, not limited to the main body 120. [Explanation of symbols]

[0034] 100…Concrete finisher 110…Formwork 120…Main body 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 arranged in parallel at a construction site of a concrete pavement; A screed plate attached to a predetermined location of the main body; at least one vibrator attached to the screed plate; A height determining member is disposed in front of the screed plate in the moving direction of the main body and determines a standard for the leveling height of the ready-mixed concrete; having the height determining member includes a first plate member having an elongated rectangular shape, and a second plate member having an elongated rectangular shape and rising 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 according to 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 according to claim 1.

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

2. The concrete finisher according to claim 1.

5. The bottom surface of the height determining member located in front of the first plate member is formed into a tapered surface that gradually becomes higher toward the front.

2. The concrete finisher according to 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 based on the upper surface of the first plate member of the height defining member, 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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