JP7300807B1 - Concrete delivery member and concrete finisher - Google Patents

Abstract

[Problem] To provide a concrete delivery member and a concrete finisher capable of preventing the occurrence of defective construction caused by a worker stepping into unhardened concrete after compaction. SOLUTION: In a concrete finisher, a concrete feeding member which is reciprocated in the horizontal direction while being vibrated by a vibrating means and a reciprocating means, which is extended in the horizontal direction with respect to the running direction in order to remove surplus concrete. and a concrete finisher having the concrete delivery member characterized in that it comprises an uneven portion on the traveling direction side for delivering surplus concrete leftward and/or rightward. This allows workers to remove excess concrete without stepping into uncured concrete. [Selection diagram] Fig. 1

Description

The present invention relates to a concrete delivery member for delivering surplus concrete poured onto a construction target road surface to the outside of the construction target road surface when concrete paving is performed, and a concrete finisher provided with the concrete delivery member.

Concrete pavement involves imparting moderate vibrations to the concrete poured onto the road surface to be constructed, compacting the concrete, and then performing finishing work to flatten the surface of the concrete. This finishing work is done using a device called a concrete finisher.
Conventionally, a concrete finisher is a large-scale device as described in Patent Document 1, and not only is the cost of the device high, but it also takes a lot of labor to transport the device to the site, and many workers are required. rice field. In order to solve this problem, a simple concrete finisher as disclosed in Patent Document 2 is provided.

JP-A-10-114910 Utility Model Registration No. 3216793

The simple pavement machine described in Patent Document 2 is a small concrete finisher mainly composed of a plurality of vibrating frames, and by pulling and sliding on the concrete slab, the vibrating frame levels and flattens the surface of the concrete. It is finished to This will
It enables efficient and highly accurate placement work with a small number of people.

By the way, when using a concrete finisher such as Patent Document 2, after compacting the concrete (ready concrete) poured into the road surface to be constructed with a bar-shaped vibrator or the like, surplus concrete piled up to a predetermined height or more is removed. There is a need. If the concrete finisher is run while surplus concrete remains, unevenness and undulations will occur on the construction surface, causing defects. Further, since the weight of the concrete finisher is light, the vehicle may run on surplus concrete and become unable to travel. Excess concrete is removed manually by a worker stepping onto the compacted concrete and using a shovel or the like. However, the compaction becomes uneven at the places where the workers have stepped, and this causes construction defects such as unevenness and poor flatness after the concrete hardens.

SUMMARY OF THE INVENTION The present invention solves the above problems by providing a concrete delivery member and a concrete finisher that eliminate the need for workers to step into unhardened concrete to remove excess concrete.

The concrete delivery member of the present invention reciprocates in the horizontal direction while being vibrated by the vibrating means and the reciprocating means, which extend in the horizontal direction with respect to the running direction of the concrete finisher in order to remove surplus concrete in the concrete finisher. A rod-shaped concrete delivery member having a substantially rectangular cross section in a direction perpendicular to the extension direction , and provided with an uneven part for delivering surplus concrete to the left and right on the running direction side , and this uneven part is seen in plan view. An inclined surface inclined in the running direction from the center of the concrete delivery member toward the left and right ends thereof and a delivery surface extending in the running direction are formed in a sawtooth shape so as to be alternately arranged in the horizontal direction. It is characterized.
A concrete finisher according to the present invention smoothes the surface of concrete poured onto a road surface to be constructed in concrete pavement while traveling, and includes the above-described concrete delivery member.
Further, the concrete finisher described above includes a vibrating frame, a pair of traveling devices, a pair of lifting devices, and a vibrating device. The elevating devices are arranged one by one on the left and right sides of the vibrating frame, each of which connects the traveling device existing on the side on which it is arranged and the left and right ends of the vibrating frame, and the traveling The left and right ends of the vibrating frame can be raised and lowered with respect to the apparatus, and the concrete feeding member is supported on the traveling direction side of the vibrating frame so that the lower surface of the concrete delivery member is higher than the lower surface of the vibrating frame. It is.

According to the present invention, surplus concrete can be sent out and removed from the road surface to be constructed by the concrete delivery member during the finishing work by the concrete finisher. Therefore, workers do not have to step into uncured concrete to remove excess concrete. As a result, it is possible to prevent the occurrence of construction defects caused by workers stepping in, and it is possible to achieve a concrete pavement with less unevenness and good flatness.
Further, by configuring the uneven portion in a sawtooth shape, surplus concrete can be efficiently removed, and the speed of finishing work can be improved.

1 is a schematic diagram of a concrete finisher of the present invention; FIG. 1 is a front view of a concrete finisher of the present invention; FIG. 1 is a cross-sectional view of a concrete delivery member of the present invention; FIG. FIG. 2 is a cross-sectional view taken along the line AA of FIG. 1; FIG. 4 is a schematic diagram of a concrete finisher of the present invention according to another aspect;

INDUSTRIAL APPLICABILITY The present invention prevents the occurrence of construction defects caused by workers stepping into unhardened concrete in concrete pavement.

A concrete delivery member and a concrete finisher according to the present invention will be described with reference to the drawings. FIG. 1 is a schematic diagram (plan view) of the concrete finisher of the present invention. FIG. 2 is a front view of the concrete finisher of the present invention. FIG. 3 is a cross-sectional view of the concrete delivery member of the present invention taken along the line BB in FIG. FIG. 4 is a cross-sectional view taken along line AA of FIG.

The concrete finisher 10 of the present invention shown in FIGS. 1 and 2 smoothes the surface of concrete (ready-mixed concrete) 30 poured onto a road surface to be constructed in concrete pavement while traveling. The concrete finisher 10 includes a vibrating frame 12, a pair of traveling devices 14, a pair of elevating devices 16, and a vibrating device 20. A concrete delivery member 18 is supported on the vibrating frame 12 in the traveling direction. The arrow F direction in the figure is the running direction (forward) of the concrete finisher 10 .

The vibrating frame 12 is a rod-shaped member extending in the lateral direction with respect to the running direction of the concrete finisher 10. In this embodiment, the cross section in the direction perpendicular to the axis (extending direction) has a substantially rectangular shape. ing. The vibrating frame 12 can level the surface of the concrete 30 while rubbing and vibrating the surface of the concrete 30 at the time of finishing work.

The traveling devices 14 are arranged on both sides of the vibrating frame 12 in the left-right direction.
In this embodiment, the pair of traveling devices 14 are crawler type traveling devices driven by a hydraulic motor or an electric motor. As shown in FIG. 1, the traveling devices 14 are arranged so that their traveling directions are aligned with each other in the front-rear direction.

The lifting devices 16 are arranged on both left and right sides of the vibrating frame 12 one by one. The lifting device 16 includes an inner cylinder 16c arranged vertically, an outer cylinder 16a fitted on the inner cylinder 16c so as to be vertically displaceable, and an outer cylinder 16a vertically displaceable with respect to the inner cylinder 16c. and an elevation driving mechanism 16b (for example, a hydraulic motor, an electric motor, an actuator, etc.) for driving the motor.
The pair of lifting devices 16 each connect the traveling device 14 on the side where it is arranged and the left and right ends of the vibrating frame 12 . In this embodiment, the travel device 14 is connected to the lower end of the inner cylinder 16c, and the end of the vibrating frame 12 is connected to the lower end of the outer cylinder 16a. As a result, the left and right end portions of the vibrating frame 12 can be independently moved up and down by the operation of the lifting drive mechanism 16b, and the vibrating frame 12 can be held at an arbitrary height and inclination.

The vibrating device 20 vibrates the vibrating frame 12 and the concrete delivery member 18 at a constant frequency. In this embodiment, the vibrating device 20 is arranged on a mounting base 40 arranged on the vibrating frame 12 . The vibration device 20 uses a known vibrator such as an electric or pneumatic vibrator. When the vibrating device operates, the vibration is transmitted through the installation table 40 and the like to vibrate the vibrating frame 12 and the concrete delivery member 18 . The vibration frequency of the vibration device may be appropriately selected according to the hardness of the concrete to be poured, and is, for example, 45.5 to 60 Hz. In this embodiment, an electric vibration motor (3-phase 200 V, frequency 50 Hz) was used as the vibration device.

The concrete finisher 10 of the present invention may include a power source 22 and a hydraulic pump 24 . In this embodiment, the power source 22 and the hydraulic pump 24 are arranged on the installation base 40 .
Power source 22 is an engine generator. The hydraulic pump 24 is a hydraulic pump driven by electric power from the power source 22 . The power source 22 and the hydraulic pump 24 drive the hydraulic/electric devices (the traveling device 14, the lifting device 16, etc.) that constitute the concrete finisher 10 . It should be noted that the power source 22 and the hydraulic pump do not necessarily have to be installed on the concrete finisher 10 and may be installed outside.

The concrete delivery member 18 is a member for delivering the surplus concrete 30a to the left and right of the concrete finisher 10 .
The concrete delivery member 18 is a rod-shaped member extending in the horizontal direction with respect to the running direction of the concrete finisher 10, and has an uneven portion 18a for delivering surplus concrete on its running direction surface. 1 and 2, the concrete delivery member 18 has a substantially rectangular cross section in a direction perpendicular to the axis (extending direction), and has an uneven portion along the vibrating frame 12 along the traveling direction of the vibrating frame 12. 18a is oriented in the running direction, and supported via rails 42 so as to reciprocate in the left-right direction.

The support height of the concrete delivery member 18 is not particularly limited. In this embodiment, the lower surface of the concrete delivery member 18 is the vibrating frame 1 .
2 is supported so as to be higher by about 5 mm than the lower surface of . By setting the lower surface of the concrete delivery member 18 higher than the lower surface of the vibrating frame 12, it is possible to obtain concrete with few holes on the surface, as will be described later.

Further, the concrete feeding member 18 can reciprocate in the left-right direction while vibrating by the vibrating means 20 and the reciprocating means 44 . In this embodiment, the vibrating means 20 is a vibrating device 20 installed on the vibrating frame 12 . The reciprocating means 44 includes a connecting rod 44c connected to the concrete delivery member 18 and a crank device 4 driven by a hydraulic motor 44a.
4b. When the concrete finisher 10 is running, the concrete feeding member 18 can push out the surplus concrete 30a in front of the uneven portion 18a in the left-right direction, and vibrate the upper surface of the concrete 30 with the lower surface to evenly rub it.

As shown in FIG. 3(a), the concave-convex portion 18a of the concrete delivery member 18 is formed to have a serrated cross-section in plan view. The concave and convex portion 18a having a serrated cross section is composed of an inclined surface 18b inclined in the running direction from the center of the concrete delivery member 18 toward the left and right ends thereof, and a delivery surface 18c extending in the running direction. are arranged alternately. Although there is no limitation on the size of the inclined surface forming the uneven surface and the sending surface, in this embodiment, the length of the inclined surface is about 10 cm and the length of the sending surface is about 3.5 cm in plan view. With such a configuration, the uneven portion 1
When 8a contacts the excess concrete 30a while reciprocating left and right, the inclined surface 18b receives the excess concrete 30a, and the delivery surface 18c pushes the excess concrete 30a.
It is formed so as to promote the delivery of surplus concrete 30a. Also, as above,
By reversing the direction of the inclined surface 18b from the left-right center and sending out the concrete to the left and right respectively, the moving distance from the surplus concrete to the outside of the road surface to be constructed can be shortened, and efficient sending can be realized.

Further, a convex portion 18d formed with a surface that slopes rearward from the center toward the left and right ends as shown in FIG. When the amplitude of the reciprocating motion is smaller than the lateral width W of the inclined surface 18b, delivery of surplus concrete is delayed in the vicinity of the location where the direction of the tooth changes (for example, in the vicinity of the lateral center of the uneven portion 18a in FIG. 3(a)). There is By providing the convex portion 18d, the stagnation can be eliminated, and surplus concrete can be evenly sent out over the entire concave-convex portion 18a.

In addition, the inclined surface 18b may be inclined in the traveling direction toward either one of the left and right ends of the concrete delivery member 18 (Fig. 3(c)). By forming in this way, for example, when the shape of the road surface to be constructed is limited, the surplus concrete 30a can be delivered to either the left side or the right side.

The amplitude and frequency of the reciprocating motion of the concrete delivery unit 18 are not particularly limited, and are mainly adjusted by the traveling speed of the concrete finisher 10 . In this embodiment, when the running speed of the concrete finisher during finishing work is about 0.5 to 2.0 m/min, the amplitude is set to 12 cm, which is larger than the width of the pair of inclined surfaces and the delivery surface, and the reciprocating frequency is 0.5-0.7H
about z.

The concrete finisher 10 of the present invention is provided with an operation panel (not shown). The control panel performs drive operations of the traveling device 14 and the lifting device 16 independently on the left and right sides. Also, the vibration device 20, the power source 22, and the crank device 44 may be operated to operate and stop. The installation position is not particularly limited, and for example, it is installed on the side of the lifting device 16 or the like.

Next, with reference to FIGS. 1 and 4, the operations of the concrete finisher 10 and the concrete delivery member 18 of the present invention configured as described above and the concrete paving work using them will be described.

In concrete pavement, a road surface to be constructed in a site 32 is first surrounded by a formwork 34 , and concrete (ready-mixed concrete) 30 is poured into the inside of the formwork 34 . Next, while spreading the concrete 30 evenly, the concrete 30 is vibrated and compacted using a rod-shaped vibrator or the like.
Next, finishing work is performed by the concrete finisher 10 of the present invention. The power source 22 and vibration device 20 of the concrete finisher 10 are operated, and the concrete finisher 10 is moved to the edge of the road surface to be worked (work start position) by the traveling device 14 . At this time, the concrete finisher 10 straddles the construction target road surface with the pair of traveling devices 14 and is positioned so that the vibrating frame 12 crosses over the concrete 30 . Next, the lifting device 16 is driven to adjust the lower surface of the concrete delivery member 18 to a predetermined height H. As shown in FIG. Here, the portion exceeding the predetermined height H is surplus concrete 30a.

After adjusting the height, the concrete finisher 10 is run. As the vehicle travels, the concrete delivery unit 18 reciprocates left and right while vibrating the concrete in contact with it to increase fluidity, thereby delivering surplus concrete 30a in the left and right direction. It is discharged outside the construction target road surface. In addition, the surface of the concrete 30 is rubbed while being vibrated by the lower surface of the concrete delivery part 18, and is flattened while being compacted.

When the lower surface of the concrete delivery unit 18 is set higher than the lower surface of the vibrating frame 12, the lower surface of the vibrating frame 12 further vibrates the concrete 30 while rubbing it, thereby leveling and compacting the concrete more accurately. In addition, in the space 30b between the lower surface of the concrete delivery member 18 in front of the vibrating frame 12 and the stepped space 30b, a certain amount of concrete whose fluidity has been increased by the excitation is always held. Even if holes are formed on the surface of the concrete due to the movement of aggregates or air bubbles when passing through the vibrating frame 12, the contained concrete flows in and fills the holes, so that a concrete pavement excellent in surface appearance can be obtained. It should be noted that the amount of concrete held in the space 30b by the delivery of the concrete delivery unit 18 does not become excessive enough to cause defective construction.
In this way, the concrete finisher 10 travels to the end of the road surface to be constructed, and the finishing work is completed.

As described above, according to the concrete delivery member and the concrete finisher of the present invention, after the concrete poured onto the road surface to be constructed is compacted, the surplus concrete is removed from the road surface to be constructed without the worker stepping into the concrete before hardening. can be sent outside. Therefore, non-uniform compaction due to stepping in by workers does not occur, and construction defects such as unevenness after hardening can be prevented. In addition, workers for removing surplus concrete are no longer required, so the shortage of workers can be resolved.

The invention also has the following advantages. The concrete delivery member of the present invention delivers surplus concrete in the left-right direction by reciprocating in the left and right direction, and does not push out surplus concrete by applying a downward load. Therefore, even when the weight of the concrete finisher is light, the phenomenon of running over surplus concrete is less likely to occur, and the concrete finisher can be suitably used.
In addition, since the concrete delivery member has the functions of delivery, leveling, and compaction of surplus concrete in one member, as in Patent Document 1, a screw spreader for spreading concrete and a screed for leveling concrete are large scales. There is no need to provide multiple mechanisms. Therefore, the concrete finisher according to the present invention can be constructed at low cost and in a small size. As a result, it is possible to pave a road surface with a width of approximately 3.5 m or less, which is difficult to carry in and use a large concrete finisher due to the narrow work area, and which has few construction defects. This can be used not only for general roads but also for general residential parking lots (for example, road surfaces with a width of 2.5 to 3.0 m and a length of 5.0 to 5.5 m).

Further, the concrete delivery member of the present invention may be provided in a known concrete finisher in addition to the concrete finisher having the above configuration. As known concrete finishers, for example, rails are installed on both sides of the pavement site, and construction is performed by running the concrete finisher along the rails, and a self-propelled type equipped with a running device. mentioned. Moreover, the size of the system does not matter. Known concrete finishers typically include a vibration device and a power source. Therefore, the concrete delivery member of the present invention can be easily provided for these, and it becomes possible to prevent construction defects caused by workers stepping in.

Incidentally, as shown in FIG. 5, one concrete finisher 10 may be provided with two or more concrete delivery members of the present invention. In this case, a plurality of concrete delivery members 18
are supported so as to be parallel to each other in front of the vibrating frame 12 (the other components shown in FIG. 5 are the same as those described above, so the description thereof is omitted). In addition, the concrete delivery member 12 located in the front may be supported so that the height of the lower surface thereof becomes higher. By configuring in this way, the amount of concrete delivered by one concrete delivery member is reduced, so that the running speed (construction speed) of the concrete finisher can be increased, and quick finishing work can be performed.

10 Concrete finisher 12 Vibration frame 14 Traveling device 16 Lifting device 18 Concrete delivery member 18a Uneven portion 20 Vibration device (vibration means)
30 poured concrete 30a surplus concrete 44 reciprocating means

Claims (3)

In the concrete finisher, in order to remove surplus concrete, it is reciprocated in the horizontal direction while vibrating by the vibrating means and the reciprocating means , which are installed in the horizontal direction with respect to the running direction of the concrete finisher. A rod-shaped concrete delivery member having a substantially rectangular cross section in the vertical direction , and provided with uneven portions for delivering surplus concrete to the left and right on the running direction side, and the uneven portions are located on the left and right sides of the concrete delivery member in plan view. Concrete delivery characterized by forming a sawtooth shape so that an inclined surface inclined in the running direction from the center toward the left and right ends and a delivery surface extending in the running direction are alternately arranged in the left and right direction. Element. A concrete finisher for leveling the surface of concrete poured onto a road surface to be constructed in concrete pavement while traveling, the concrete finisher comprising the concrete delivery member according to claim 1 . A concrete finisher that smoothes the surface of concrete poured onto a road surface to be constructed in concrete pavement while traveling,
A vibrating frame, a pair of traveling devices, a pair of lifting devices, and a vibrating device,
The traveling devices are arranged one by one on both sides in the left-right direction of the vibrating frame,
The lifting devices are arranged on the left and right sides of the vibrating frame one by one, each connecting the traveling device existing on the side on which it is arranged and the left and right ends of the vibrating frame, and connecting the vibrating frame to the traveling device. It is possible to move up and down the left and right ends,
The concrete feeding member according to claim 1 is supported on the traveling direction side of the vibrating frame so that the height of the lower surface thereof is higher than the lower surface of the vibrating frame .
Concrete finisher.

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