JP2023069118A - Concrete vibrator and construction method using the same - Google Patents

Abstract

To provide a concrete vibrator capable of evenly spraying a concrete drying retardant while compacting the bottom slab concrete and floor slab concrete by one person in the summer, setting the hardening time of the concrete surface and the inside at the same timing, suppressing the occurrence of cracks on the concrete surface, and smoothing and finishing the concrete surface.SOLUTION: The concrete vibrator includes at least a compaction plate that compacts the concrete surface by applying vibration, a power mechanism that vibrates the compaction plate, and a spraying device for spraying the concrete drying retardant.SELECTED DRAWING: Figure 1

Description

The present invention relates to a concrete vibrator capable of compacting from the surface of concrete considering the timing of hardening between the surface and the inside of concrete, and finishing the surface while spraying a concrete drying retardant. is.

Conventionally, as a procedure for placing ready-mixed concrete for bottom slab concrete and floor slab concrete, the ready-mixed concrete is pumped by a pump truck and put into the formwork, and then from the inside of the concrete using a high-frequency vibrator and using an engine type tamper. Compact from the concrete surface. Then, while checking the level of the finished height, the concrete surface is rough-finished with a wooden trowel or the like, and after a predetermined strength is obtained, the concrete surface is finished with a metal trowel or the like.

In this case, if all the work is done manually, it will be difficult to secure workers and the fatigue of each worker will become significant. For example, the prior art of an engine-type tamper that can level and finish the concrete surface while compacting the bottom slab concrete and floor slab concrete has been disclosed (Reference 1).

Japanese Patent Application Laid-Open No. 2021-17721

The prior art of Patent Document 1 is excellent in that it does not require the number of workers, does not apply a load to the bar arrangement because it is not heavy, and can be compacted and leveled by a machine, thereby saving labor. there is However, during work in the summertime, if the surface dries before the concrete hardens, only the concrete surface will dry and shrink, and cracks will occur on the concrete surface. In order to prevent this, it is necessary to spray a concrete drying retardant on the surface of the concrete to reduce the difference in curing time between the surface and the inside of the concrete. Also, if it is sprayed in advance before tampering, the concrete drying retardant will accumulate in the footprints and cannot be sprayed evenly, resulting in a uniform hardening time on the concrete surface. There was a risk that cracks would occur on the concrete surface due to variations in quality.

The present invention solves these problems. In the summer, one person can evenly spray the concrete drying retardant while compacting the bottom slab concrete and floor slab concrete to harden the concrete surface and inside. To provide a concrete vibrator capable of suppressing the occurrence of cracks on a concrete surface by setting the time to the same timing and smoothing and finishing.

In order to achieve the above object, a concrete vibrator according to claim 1 of the present invention comprises a compaction plate that applies vibration from the surface of concrete to compact it, a power mechanism that vibrates the compaction plate, and a concrete drying delay. and a spraying device for spraying the agent.

By adopting this configuration, the concrete vibrator according to claim 1 of the present invention vibrates the compaction plate by a power mechanism such as an engine or a motor, and applies the vibration from the surface of the concrete to compact the concrete. be able to. In addition, since the concrete vibrator is equipped with a spraying device for spraying the concrete retarder, especially in the summer, the inside and the surface of the concrete can be hardened at the same timing, so that cracks do not occur on the concrete surface. occurrence can be suppressed. Therefore, it is possible to prevent water from entering the inside of the concrete through the cracks, so that high-quality concrete can be cast.

Further, according to claim 2 of the present invention, there is provided a concrete vibrator according to claim 1, wherein the spraying device comprises uniform spraying means for uniformly spraying the concrete drying retardant. Characterized by

Since the concrete drying retardant can be uniformly dispersed by the spraying device having the uniform spraying means, the hardening time of the concrete surface can be made uniform. Therefore, it is possible to suppress the occurrence of cracks due to drying shrinkage caused by the difference in hardening time of the concrete surface.

Further, according to claim 3 of the present invention, there is provided a concrete vibrator according to claim 1 or 2, wherein the concrete vibrating machine according to claim 1 or 2 is provided with a connecting member provided on the compaction plate, and a rear portion of the compaction plate by means of the connecting member. It is characterized by comprising a screed supported at a position and a damping rubber provided on the connecting member. According to claim 4 of the present invention, there is provided a concrete vibrator according to claim 3, wherein said spraying device is provided with a uniform spraying means, and between said compaction plate and said screed It is characterized by uniformly spraying the concrete drying retardant at the position of

By adopting these constructions, the concrete vibrator according to claim 3 is provided with a screed supported by a connector provided on the compaction plate, and the surface of the concrete compacted by the compaction plate is , the screed may provide a smooth finish. Here, the couplings are equipped with damping rubbers, so that the vibrations of the compaction plates and the engine are not transmitted to the screed. Therefore, the screed can smooth and finish the concrete surface. Also, the concrete vibrator according to claim 4 can uniformly spray the concrete drying retardant between the compaction plate and the screed. Therefore, when the concrete vibrator is moved manually by the worker, the footprints of the worker are compacted and evened out by the compaction plate, and the footprints of the worker are eliminated. do not have. Therefore, since the concrete drying retardant is evenly sprayed, it is possible to suppress the unevenness of the curing time on the concrete surface, and it is possible to suppress the drying shrinkage of the concrete caused by the difference in the curing time. Crack generation after curing can be suppressed.

Therefore, if the concrete vibrator according to the present invention is used, a single worker can perform the compaction work of concrete, the spraying of the concrete drying retardant, and the smoothing work of the surface at the same time, so that the number of workers can be reduced. As a result, it is possible to save the labor of the work, and it is possible to cast high-quality concrete, thereby preventing the occurrence of cracks on the concrete surface.

According to claim 5 of the present invention, in the concrete vibrator according to claim 3 or 4, the screed is rotated upward by a rotation support means. According to claim 6 of the present invention, in the concrete shaker according to claim 5, the screed is supported by the rotating means having an angle adjusting mechanism. According to claim 7 of the present invention, in the concrete vibrator according to any one of claims 3 to 6, the screed is made of aluminum.

By adopting these structures, the screed can be freely lifted upward from the concrete surface and rotated by the rotating support means, so that the screed can be moved upward. Therefore, since the screed does not get in the way, the compaction plate can be applied to the ends of the bottom slab concrete and the floor slab concrete, and the concrete can be compacted all the way around the pillars and walls.

Also, the bottom surface of the screed can always be kept at a constant angle with respect to the concrete surface. When pulling the concrete vibrator manually, there are workers who pull the compaction plate horizontally against the concrete surface, and workers who pull it at a certain oblique angle. The screed can be pulled at a constant angle by adjusting the angle with the angle adjusting mechanism according to the worker's own habits, concrete strength and slump, so that the finish of the concrete surface can be improved.

In addition, since the screed of the concrete vibrator according to the present invention is made of aluminum, it is strong and light, and has a smooth bottom surface, so that workers are less fatigued, it is hard to break, and the concrete surface can be evenly distributed. The finish is also very good. In addition, since the inclined surface part is projected in front of the bottom surface of the screed in the direction of movement, even if the concrete surface is uneven, the concrete surface can be pressed against the bottom surface of the aluminum screed, so it does not get caught and is smooth. Surface leveling finishing work is possible.

Further, in the construction method using the concrete vibrator according to claim 8 of the present invention, after placing the ready-mixed concrete, the concrete surface height is adjusted while compacting the inside of the concrete with the vibrator, and then the concrete surface height is adjusted. Compaction work is performed while spraying a concrete retarder using the concrete vibrator described above, the finished height is checked again, and then the concrete vibrator according to any one of claims 3 to 7 is used to re-compact. It is characterized in that, at the same time as performing hardening work, smoothing and finishing work is performed while spraying a concrete retarder.

By adopting this construction method, after pouring ready-mixed concrete, while compacting the inside of the concrete with a vibrator, when leveling the concrete surface to a predetermined height, the footsteps of the workers walking will make the concrete submerged. Floating aggregates and re-mixed air in concrete are compacted using the concrete vibrator of claim 1 or 2 while spraying a concrete drying retardant, so it can be used in summer. By submerging the aggregate again and removing the air, the timing of hardening of the concrete surface and the inside can be synchronized in the same manner. Furthermore, when the finished height is checked again, in order to remove the floating aggregate and air, the concrete vibrator according to any one of claims 3 to 7 is used again to compact the concrete. At the same time, since the concrete drying retardant is sprayed and the surface is leveled at the same time, the timing of hardening of the concrete surface and the inside can be synchronized at the same time, and the occurrence of cracks due to drying shrinkage of the concrete surface can be suppressed. . Therefore, high-quality bottom slab concrete and floor slab concrete can be made.

According to the concrete vibrator according to claims 1 to 7 of the present invention, the bottom slab concrete and floor slab concrete can be compacted to every corner, and the surface can be finished at the same time while spraying the concrete drying retardant. can. Therefore, crack generation of concrete can be prevented. In addition, by using the concrete vibrator according to the present invention, the number of workers can be greatly reduced and the labor of workers can be saved, so that labor costs can be suppressed and labor shortages in the construction industry can be reduced. It can be used for countermeasures. Further, by using the construction method of claim 8 according to the present invention, high-quality concrete can be produced.

BRIEF DESCRIPTION OF THE DRAWINGS It is a typical perspective view of the concrete vibrator which concerns on the form for implementing this invention. FIG. 4 is a schematic perspective view of another concrete vibrator according to the embodiment of the present invention; It is a typical perspective view which shows the construction condition of the concrete vibrator which concerns on the form for implementing this invention. It is a typical perspective view which shows the construction condition of the concrete vibrator of another form which concerns on the form for implementing this invention. It is a schematic side view which shows the construction condition of the concrete vibrator which concerns on the form for implementing this invention. It is a schematic side view which shows the construction condition of the concrete vibrator of another form which concerns on the form for implementing this invention.

The concrete vibrator 1 according to the present invention, as shown in FIG. The concrete vibrator includes at least a power 4 for reciprocating motion and a spraying device 3 for spraying a concrete drying retardant 3-1. Furthermore, as shown in FIG. 1, a handle 6 extending upward from the compaction plate 2 and equipped with an operation switch for the power 4, a connector 7 provided on the compaction plate 2 and having a damping device, and a connector 7 At a position behind the compaction plate 2 there may be provided a screed 5 which is rotatably supported.

As shown in FIGS. 1 and 2, the compaction plate 2 is made of synthetic resin, and is moved up and down by a power source 4 such as an engine or a motor and a drive mechanism to apply vibrations from the surface of the bottom slab concrete 20 to strike. It is intended to sink the aggregate of the concrete 20 immediately after installation and to float air bubbles to compact the bottom slab concrete 20.例文帳に追加

In the spraying device 3, a stored concrete drying retardant 3-1 is supplied from a concrete drying retardant tank 3-2 carried on the back of the worker 10 to a sprayer via a hose 3-3 by a pump or a small engine. After being sent, the concrete drying retardant 3-1 can be uniformly sprayed and spread. Therefore, the concrete drying retardant 3-1 can be evenly sprayed especially in summer when the concrete surface hardens quickly, so that the concrete surface and the inside can be hardened at the same timing in the sprayed range. Therefore, it is possible to suppress the occurrence of cracks due to drying shrinkage of concrete after hardening, and it is possible to cast concrete of good quality. The spraying device 3 is provided at a position between the compaction plate 2 and the screed 5 so that the concrete drying retardant 3-1 can be sprayed evenly without accumulating in the footprints of the worker 10, and the concrete drying retardant The agent 3-1 is suitable because it allows the screed 5 to slide smoothly.

The power 4 is a small engine or a small motor for the tamper, and it suffices if it has an output capable of reciprocating the compaction plate 2 up and down. Therefore, it does not damage the reinforcement arrangement, so that the finished concrete can reliably exert a predetermined tensile force, and it can be used for floor slab concrete with thin concrete and reinforced concrete with shallow cover.

The screed 5 is made of aluminum, as shown in FIG. , the surface of the bottom slab concrete 20 is also smoothed and finished. Although the bottom slab concrete 20 is compacted by the compaction plate 2, the surface of the bottom slab concrete 20 is slightly uneven. Concrete protruding from the surface is held down by a screed 3, and the surface of the bottom slab concrete 20 can be smoothed and finished to a clean surface without unevenness.

The handle 6 may be made of metal or synthetic resin, and is preferably made of aluminum with an alkali-resistant surface because of its light weight and good durability. Since the handle 6 is provided with an operation lever 8-3 for operating the rotating device 8, the rotating device 8 can be conveniently operated at hand.

The connector 7 connects and supports the compaction plate 2 and the screed 5 so as to be rotatable by a rotating device 8 . In addition, the vibration damping device 7-1 damps the vertical movement of the compaction from the compaction plate 2 and the vibration of the engine 4, and prevents the vibration from being transmitted to the screed 5. Therefore, since vibration is not transmitted to the screed 5, the surface finish of the bottom slab concrete 20 can be made into a clean flat surface. In addition, since an angle adjusting device 7-2 is provided on the screed 5 side of the connector 7, the pulling angle of the compaction plate 2 varies depending on each worker 10, but the bottom plate can be adjusted depending on the bottom surface of the screed 5. Each worker 10 can adjust the angle of the bottom surface of the screed so that the concrete 20 has a nice level finish. As a result, the worker 10 can finish the surface of the concrete 20 evenly even if he/she works in his/her own comfortable system, so that the work efficiency can be improved. It should be noted that the vibration damping device 7-1 is preferably made of vibration damping rubber because of its light weight.

The rotating device 8 is a device capable of rotating the screed 5 . By moving the operation switch provided on the handle 6, the wire 8-1 is pulled, and by supporting the wire 8-1 with the rotating support 8-2, the wire 8-1 is connected. The rod connecting the tool 7 is pulled by the wire 8-1, and the screed 5 is rotated and lifted. The screed 5 is pivotable above the compaction plate 2 . Therefore, since the compaction plate 2 can be moved to the edges of the columns and walls of the bottom concrete 20, the bottom concrete 20 can be compacted reliably. When the screed 5 is lowered, the operation lever 8-3 is returned to its original position, and the wire 8-1 is loosened, so that the screed 5 rotates in the opposite direction by its own weight, and the screed 5 comes into contact with the bottom slab concrete 20.例文帳に追加

Moreover, as shown in FIGS. 4, 5, 6, and 7, an example of a construction method of the concrete vibrator 1 according to the present invention will be described. Check and adjust the height while compacting the ready-mixed concrete with a hand vibrator, etc., and pour it. Next, the concrete vibrator 1 according to the present invention comprising at least a compaction plate 2, a power source 4, and a sprayer 3 is used to compact the base concrete 20 from the surface while spraying the concrete drying retardant 3-1. To go. Then, while checking the finished height again with a level, it is leveled. At that time, the feet of workers checking the height and leveling the concrete surface may cause submerged aggregates to float and air to mix with the concrete again. Next, after 10 to 20 minutes, the present invention comprising at least the compaction plate 2, the power 4, the spreading device 3, the connector 7, and the rotatably supported screed 5 Using another type of concrete vibrator 1, compaction is again performed from the surface, and the surface of the bottom slab concrete 20 is leveled while spraying the concrete drying retardant 3-1. As a result, the aggregate can be re-submerged in the bottom slab concrete 20 by the compaction plate 2, and air bubbles in the bottom slab concrete 20 can be floated again, so that the concrete is sufficiently compacted. In addition, especially in summer when the concrete surface is easy to dry, the concrete drying retardant 3-1 is evenly sprayed by the spraying device 3, and the surface is precisely leveled and finished by the screed 5. can. At this time, the worker 10 required a total of three manpower, one man for the engine type tamper, one man for spraying the concrete retarder, and one man for pulling the screed, but the work can be done by one man, and labor can be saved. . Moreover, since compaction and finishing can be performed at the same time, the bottom slab concrete 20 is not disturbed again by the movement of the worker's 10 foot. Moreover, since the concrete drying retarder 3-1 can harden the surface and the inside of the concrete 20 at the same timing, cracks due to drying shrinkage of the concrete 20 can be suppressed. Therefore, the bottom slab concrete 20 which is sufficiently compacted, has a clean surface, and suppresses the occurrence of cracks can be placed. At the customer's request, after a predetermined period of time has elapsed, the plasterer may perform metal trowel finishing.

When the concrete vibrator 1 according to the present invention is used, the surface and the inside of the concrete 20 can be hardened at the same timing by the concrete drying retarder 3-1, so cracks due to drying shrinkage of the concrete 20 can be suppressed. be able to. Therefore, the bottom slab concrete 20 which is sufficiently compacted, has a clean surface, and is less cracked and of good quality can be placed. In addition, the compaction work, the spraying work of the concrete drying retardant, and the work of leveling the concrete surface can be performed simultaneously by a single worker, so that the number of workers can be reduced to save labor and improve efficiency. can be improved. Since the concrete vibrator 1 is lightweight and does not damage the bar arrangement, the finished bottom slab concrete 20 can reliably exert a predetermined tensile stress. It can also be used for floor slab concrete with a thin reinforcing bar covering and a thin concrete thickness. In addition, since the concrete vibrator 1 is lightweight, it is easy for the operator 10 to handle and does not cause fatigue. In addition, since it can be used around the pillars and walls of the bottom slab concrete, there is no need to prepare many types of machines, and the purchase and rental costs of machines can be reduced. Since the concrete vibrator 1 according to the present invention is lightweight, it can be used not only for the bottom slab concrete 20 but also for floor slab concrete with thin concrete and a thin covering of reinforcing bars.

It can be widely used in the field of placing ready-mixed concrete such as bottom slab concrete and floor slab concrete.

1: Concrete vibrator 2: Compaction plate 3: Sprinkler 3-1: Concrete drying retarder 3-2: Concrete drying retarder tank 3-3: Hose 4: Engine (power)
5: Screed 6: Handle 7: Connector 7-1: Vibration damping device 7-2: Angle adjustment device 8: Rotation device 8-1: Wire 8-2: Rotation support
8-3: Operation lever 10: Worker 20: Bottom slab concrete

In order to achieve the above object, a concrete vibrator according to claim 1 of the present invention comprises a compaction plate that applies vibration from the surface of concrete to compact it, a power mechanism that vibrates the compaction plate, and a concrete drying delay. a sprinkling device for spraying the agent, a connector provided on the compaction plate, a screed supported at a position behind the compaction plate by the connector, and a damping rubber provided on the connector. , wherein the spraying device comprises spraying means for spraying the concrete drying retardant at a position between the compaction plate and the screed.

Further, in the concrete vibrator of the present invention , the spraying device has spraying means for spraying the concrete drying retardant .

Also, the concrete vibrator of the present invention comprises a connector provided on the compaction plate, a screed supported by the connector at a position behind the compaction plate, and a damping device provided on the connector. with rubber and Further, in the concrete vibrator of the present invention, the spraying device has spraying means, and sprays a concrete drying retardant to a position between the compaction plate and the screed .

By adopting these constructions, the concrete vibrator of the present invention comprises a screed supported by connectors provided on compaction plates, and the surface of concrete compacted by the compaction plates is shaken by the screed. A smooth finish can be obtained by Here, the couplings are equipped with damping rubbers, so that the vibrations of the compaction plates and the engine are not transmitted to the screed. Therefore, the screed can smooth and finish the concrete surface. In addition, the concrete vibrator of the present invention can evenly distribute the concrete drying retardant between the compaction plate and the screed. Therefore, when the concrete vibrator is moved manually by the worker, the footprints of the worker are compacted and evened out by the compaction plate, and the footprints of the worker are eliminated. do not have. Therefore, since the concrete drying retardant is evenly sprayed, it is possible to suppress the variation in the curing time on the concrete surface, and it is possible to suppress the drying shrinkage of the concrete caused by the difference in the curing time. Crack generation after curing can be suppressed.

According to claim 2 of the present invention, there is provided the concrete shaker according to claim 1 , wherein the screed is rotated upward by rotation support means. According to claim 3 of the present invention, there is provided the concrete shaker according to claim 2 , wherein the screed is supported by the rotating support means having an angle adjusting mechanism. . According to claim 4 of the present invention, in the concrete vibrator according to any one of claims 1 to 3 , the screed is made of aluminum.

Further, in the construction method using a concrete vibrator according to claim 5 of the present invention, after placing ready-mixed concrete, the height of the concrete surface is adjusted while compacting the inside of the concrete with a vibrator, and then a concrete drying retardant is sprayed. Compaction work is performed while spraying a concrete retarder using a concrete vibrator equipped with a spraying device for performing compaction, the finished height is checked again, and then the concrete vibrator according to any one of claims 1 to 4 . is used to carry out compaction work again, and at the same time, a leveling finish work is carried out while spraying a concrete retarder.

By adopting this construction method, after pouring ready-mixed concrete, while compacting the inside of the concrete with a vibrator, when leveling the concrete surface to a predetermined height, the footsteps of the workers walking will make the concrete submerged. Floating aggregates and re-mixed air in the concrete are compacted while spraying the concrete drying retarder using a concrete vibrator equipped with a sprayer for spraying the concrete drying retarder. Since hardening work is carried out, in the summer, the aggregate can be submerged again and the hardening timing of the concrete surface and the inside can be synchronized with each other while removing the air. Furthermore, when the finished height is checked again, the concrete is compacted again using the concrete vibrating machine according to any one of claims 1 to 4 in order to remove the floating aggregate and air. At the same time, since the concrete drying retardant is sprayed and the surface is leveled at the same time, the timing of hardening of the concrete surface and the inside can be synchronized at the same time, and the occurrence of cracks due to drying shrinkage of the concrete surface can be suppressed. . Therefore, high-quality bottom slab concrete and floor slab concrete can be made.

According to the concrete vibrator according to claims 1 to 4 of the present invention, the bottom slab concrete and floor slab concrete can be compacted to every corner, and the surface can be finished at the same time while spraying the concrete drying retardant. can. Therefore, crack generation of concrete can be prevented. In addition, by using the concrete vibrator according to the present invention, the number of workers can be greatly reduced and the labor of workers can be saved, so that labor costs can be suppressed and labor shortages in the construction industry can be reduced. It can be used for countermeasures. Further, by using the construction method of claim 5 according to the present invention, high-quality concrete can be made.

Claims (8)

A concrete vibrator comprising at least a compaction plate for compacting concrete by applying vibration from the surface of the concrete, a power mechanism for vibrating the compaction plate, and a spraying device for spraying a concrete drying retardant. . 2. The concrete vibrator according to claim 1, wherein said spraying device comprises uniform spraying means for uniformly spraying said concrete drying retardant. A connector provided on the compaction plate, a screed supported by the connector at a position behind the compaction plate, and a damping rubber provided on the connector. 3. The concrete vibrator according to Item 1 or 2. 4. A concrete vibrator according to claim 3, wherein said spraying device is provided with a uniform spraying means for uniformly spraying the concrete drying retardant to a position between said compaction plate and said screed. . 5. A concrete shaker according to claim 3 or 4, wherein said screed is pivoted upward by pivotal support means. 6. A concrete shaker according to claim 5, wherein said screed is supported by said rotating means having an angle adjusting mechanism. 7. The concrete vibrator according to any one of claims 3 to 6, wherein said screed is made of aluminum. After placing the ready-mixed concrete, while compacting the inside of the concrete with a vibrator, the height of the concrete surface is adjusted, and then compaction work is performed while spraying a concrete retarder using the concrete vibrator according to claim 1 or 2. , The finished height is checked again, and then the concrete vibrator according to any one of claims 3 to 7 is used to perform compaction work again. A construction method using a concrete vibrator, characterized in that

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