Concrete leveling equipment and construction system

Abstract

To provide a concrete leveling device, etc., that improves the light reception accuracy of the laser receiver. [Solution] The concrete leveling device comprises a leveling device body, running wheels attached to the leveling device body, a scraper which is a concrete leveling member supported by the leveling device body via a support frame, a lifting mechanism that can move the scraper up and down, and a laser receiver mounted above the leveling device body. The laser receiver is attached to an upper support rod 19 which is connected to a lower support rod 11 via a rod connecting portion 30. The rod connecting portion 30 consists of a lower flange portion 31 provided at the upper end of the lower support rod 11, an upper flange portion 32 provided at the lower end of the upper support rod 19, and a connecting part 33 which fits the outer circumferences of the lower flange portion 31 and the upper flange portion 32 when the lower flange portion 31 and the upper flange portion 32 are butted together.

Description

Technical Field

[0001] The present invention relates to a concrete leveling device and a construction system using the same.

Background Art

[0002] Various concrete leveling devices for leveling the concrete surface before placed concrete harden have been conventionally proposed. A conventional concrete leveling device includes a leveling device main body, traveling wheels attached to the leveling device main body, a concrete leveling member connected to the leveling device main body via a support frame body, and a laser receiver mounted at a position higher than the leveling device main body. The laser receiver is attached to an upper support rod connected via a connecting component to a lower support rod on the leveling device main body side (see Patent Document 1).

[0003] The laser receiver is arranged at a position higher than the leveling device main body, so that it can reliably receive the laser light from the laser transmitter without being interfered by the leveling device main body. In addition, since the connection by the connecting component can be released to remove the upper support rod, the convenience in transportation, storage, handling and the like of the concrete leveling device is high.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, in the conventional example described above, the upper end surface of the lower support rod and the lower end surface of the upper support rod are butted together, and both the upper end of the lower support rod and the lower end of the upper support rod are covered and connected by a connecting part. Consequently, the lower support rod and the upper support rod are butted together over a small area, and the connecting part merely covers the ends of both support rods to hold them in place, making the upper support rod prone to looseness relative to the lower support rod. Therefore, there is a risk that the upper support rod may shake significantly in response to the shaking of the lower support rod, which can lead to a decrease in the light-receiving accuracy of the laser receiver.

[0006] Therefore, the present invention aims to provide a concrete leveling device that improves the light reception accuracy of a laser receiver, and a construction system using the same. [Means for solving the problem]

[0007] The present invention has been made in view of the above problems, and is a concrete leveling device comprising: a leveling device body; running wheels attached to the leveling device body; a concrete leveling member supported by the leveling device body via a support frame; a lifting mechanism for moving the concrete leveling member up and down; and a laser receiver mounted above the leveling device body, wherein the laser receiver is attached to an upper support rod connected to a lower support rod via a rod connecting portion, and the rod connecting portion is composed of a lower flange portion provided at the upper end of the lower support rod; an upper flange portion provided at the lower end of the upper support rod; and a connecting component that fits the outer circumferences of the lower flange portion and the upper flange portion when the lower flange portion and the upper flange portion are butted together.

[0008] Another aspect of the present invention is a construction system characterized by comprising the concrete leveling vibrator described above, a control device capable of controlling the concrete leveling vibrator, a work database capable of communicating with the control device and supplying data to the control device, and an input device for inputting data to the control device. [Effects of the Invention]

[0009] According to the present invention, since the upper support rod swings together with the lower support rod, the swing of the upper support rod is suppressed, and the light reception accuracy of the laser receiver is improved. [Brief explanation of the drawing]

[0010] The drawings illustrate specific embodiments of the present invention relating to this disclosure, including not only essential components of the invention but also optional and preferred embodiments. [Figure 1] This is a perspective view of a concrete leveling device as seen from the front, illustrating one embodiment. [Figure 2] This is a perspective view of a concrete leveling device as seen from the rear, illustrating one embodiment of the device. [Figure 3] This is a front view of a concrete leveling device, illustrating one embodiment of the device. [Figure 4] This is a side view of a concrete leveling device, illustrating one embodiment. [Figure 5] This is a perspective view of the main front part of the leveling device body, illustrating one embodiment. [Figure 6] This is a perspective view of one embodiment of the lifting mechanism. [Figure 7] One embodiment is shown, where (a) is a cross-sectional view of the rod connecting portion and (b) is a perspective view of the connecting component. [Figure 8] This shows one embodiment, an enlarged view of section VIII in Figure 1. [Figure 9] This shows one embodiment, an enlarged view of section IX in Figure 2. [Figure 10] One embodiment is shown, where (a) is a plan view of the concrete leveling device showing the sensor beam irradiation range of the distance sensor, and (b) is a side view of the concrete leveling device showing the sensor beam irradiation range of the distance sensor. [Figure 11] This is a perspective view showing one embodiment, in which a laser light receiving unit is attached to an upper support rod. [Figure 12] This is a perspective view illustrating one embodiment of a concrete leveling device and explaining the leveling operation. [Figure 13] A first modified example of one embodiment is shown, where (a) is a front view of a concrete leveling device, and (b) is a perspective view of a horizontal connecting rod. [Figure 14] A second modified example of one embodiment is shown, which is a plan view of a concrete leveling device. [Figure 15] (a) is a schematic configuration diagram of an automatic construction system, and (b) is a functional configuration diagram of a control device. [Modes for Carrying Out the Invention]

[0011] Hereinafter, one embodiment will be described in detail with reference to the accompanying drawings. Descriptions of techniques already known in the embodiment are omitted. Further, the embodiment illustrates apparatuses and methods for embodying the technical idea of the present invention, and the technical idea of the present invention is not limited to the following contents. Various modifications can be made to the technical idea of the present invention within the scope of the matters stated in the claims. In particular, it should be noted that the drawings are schematic and may differ from actual implementations.

[0012] (Construction Method for Concrete Floor Surface) For the construction of a concrete floor surface, as an example, the following steps are performed: a placing and leveling step, a laser screed step, a level checking step, a revibration compaction step, a disc troweling step, a blade pressing step, a metal trowel finishing step, and a curing step.

[0013] In the placing and leveling step, a concrete floor surface is constructed at a construction site such as a warehouse, and fresh concrete is placed at this site. The placed concrete is roughly leveled to an approximate level using a rake bar or the like. Then, a rod-shaped vibrator is inserted into the placed concrete for compaction. In the laser screed step, while monitoring the level of the concrete floor surface using laser light, the concrete surface is leveled while applying vertical vibration to the surface of the concrete floor surface. In the level checking step, the level of the leveled concrete floor surface is checked. In the re-vibration compaction step, after a predetermined time has elapsed from the level check, based on the measurement result by a bleeding measuring device, vibration is applied to the concrete surface with a vibrating blade or a rod-shaped vibrator is inserted into the concrete for re-compaction as necessary. In the disk troweling step, the surface finishing of the concrete floor surface is performed by the rotary disk of the first rotary drive machine. In the blade troweling step, the surface finishing of the concrete floor surface is performed by the blade-shaped rotary trowel of the second rotary drive machine. In the steel trowel finishing step, a plasterer performs surface finishing of the concrete surface with a steel trowel as necessary.

[0014] A concrete leveling apparatus 1 according to one embodiment is used in a laser screed step. Hereinafter, detailed description will be provided.

[0015] (Configuration of Concrete Leveling Apparatus) One embodiment of the present invention is shown in Figures 1 to 12. As shown in Figures 1 to 5, the concrete leveling apparatus 1 includes a leveling apparatus main body 2, traveling wheels 3 attached to the leveling apparatus main body 2, a scraper 5 which is a concrete leveling member supported by the leveling apparatus main body 2 via a support frame body 10, a vibrating blade 6 which is a concrete leveling member also supported via the support frame body 10, an elevating mechanism 20 for moving the scraper 5 up and down, and a laser receiver 29 mounted at a position higher than the leveling apparatus main body 2.

[0016] The leveling device body 2 is enclosed on its top, front, and rear sides by a housing 2a. The running wheels 3 are mounted below the bottom surface of the leveling device body 2. The running wheels 3 are mounted in a total of three locations: a pair on the left and right at the front of the leveling device body 2, and one in the center at the rear of the leveling device body 2. Each of the running wheels 3 at the front is a wheel with teeth formed on its outer circumference, and they are arranged in a double configuration. The running wheels 3 rotate in forward and reverse directions using a driving motor (not shown) as the driving source.

[0017] The support frame 10 is connected to the front of the leveling device body 2 via a connecting part 9. By releasing the connection of the connecting part 9, the parts in front of the connecting part 9 can be removed, allowing for the replacement of various concrete leveling members (not shown).

[0018] As shown in detail in Figure 5, the support frame 10 comprises a pair of left and right lower support rods 11 arranged vertically, two horizontal connecting rods 12 arranged at intervals horizontally and connecting the left and right pair of lower support rods 11, and a pair of intermediate support rods 13 arranged at intervals vertically between the left and right pair of lower support rods 11 and connected to each horizontal connecting rod 12.

[0019] A scraper 5 is fixed to the lower ends of a pair of left and right downward vertical rods 11 via fixed rods 16a and telescopic rods 16b. The lower parts of a pair of intermediate support rods 13, which extend further below the position of the lower horizontal connecting rod 12, are connected by a support bar 17. A vibrating blade 6 is attached to this support bar 17 via a swinging connecting member 18.

[0020] The scraper 5 is a flat plate with a straight lower end surface, and both its left and right ends are tapered. The vibrating blade 6 has a flat blade plate 6a, a vibration generating part 6b attached to the upper surface of the blade plate 6a, and vibration transmitting members 6c that transmit vibrations from the vibration generating part 6b to the left and right ends of the blade plate 6a. The blade plate 6a vibrates as a whole in the vertical direction due to vibrations from the vibration generating part 6b. The vibrations of the blade plate 6a are absorbed by the oscillating connecting part 15 and are not transmitted to the support frame body 10.

[0021] As shown in detail in Figure 6, the lifting mechanism 20 includes a pair of left and right fixed rods 16a, telescopic rods 16b that are extendable and retractable on each fixed rod 16a, and a pair of actuators 21 that are arranged in parallel near the fixed rods 16a and the telescopic rods 16b. Each fixed rod 16a is fixed to the horizontal connecting rod 12 by a connecting member 14.

[0022] Each actuator 21 has an actuator body 21a fixed to a fixed rod 16a, an output rod 21b protruding from the actuator body 21a with its tip fixed to the scraper 5, and an actuator motor 21c attached to the fixed rod 16a. The lifting mechanism 20 extends and retracts the output rod 21b with the driving force of the actuator motor 21c, thereby varying the height of the scraper 5. The fixed rod 16a and the extendable rod 16b serve as both the support frame 10 and the lifting mechanism 20.

[0023] An upper support rod 19, which is arranged coaxially with the lower support rods 11, is connected to the upper ends of a pair of left and right lower support rods 11 by a rod connecting portion 30. As shown in detail in Figures 7(a) and (b), this rod connecting portion 30 consists of a lower flange portion 31 provided at the upper end of the lower support rod 11, an upper flange portion 32 provided at the lower end of the upper support rod 19, and a connecting component 33 that fits the outer circumferences of the lower flange portion 31 and the upper flange portion 32.

[0024] The lower flange portion 31 has a central fitting portion 31a fitted inside the lower support rod 11, a flat plate portion 31b that protrudes outward from the outer peripheral end of the lower support rod 11 at a position above the central fitting portion 31a, and a central protrusion 31c provided at the center of the flat plate portion 31b. The upper flange portion 32 has a central fitting portion 32a fitted inside the upper support rod 19, a flat plate portion 32b that protrudes outward from the outer peripheral end of the upper support rod 19 at a position below the central fitting portion 32a, and a central recess 32c provided at the center of the flat plate portion 32b.

[0025] The connecting component 33 consists of two semi-circular arc portions 33a that are rotatably connected to each other at one end, and a connecting screw 33c and nut component 33d that fasten the other ends of the two semi-circular arc portions 33a together when the other ends of the two semi-circular arc portions 33a are brought together to form an annular shape. A fitting groove 33b is formed on the inner circumference of each semi-circular arc portion 33a. The fitting groove 33b opens onto the inner circumferential surface of the semi-circular arc portion 33a.

[0026] The connection using the connecting part 33 involves fitting the central protrusion 31c of the lower flange portion 31 into the central recess 32c of the upper flange portion 32, and bringing the upper surface of the flat plate portion 31b and the lower surface of the flat plate portion 32b of the upper flange portion 32 together. In this state, the connecting part 33 is attached so as to enclose the outer periphery (sides, top, and bottom) of both the flat plate portions 31b and 32b of the lower flange portion 31 and the upper flange portion 32. Then, the outer periphery (sides, top, and bottom) of both the flat plate portions 31b and 32b are fitted into the fitting groove 33b of the connecting part 33.

[0027] As shown in Figure 11, the laser receiver 29 is mounted on the upper support rod 19 so as to be vertically movable. After zero-point adjustment, there is a request to displace the position of the laser receiver 29 vertically (for example, to lower it by 2 mm) to adjust for height fluctuations after construction due to the concrete at the site. To meet this request, the laser receiver 29 is displaced vertically (for example, lowered by 2 mm) while reading the scale. At this time, the scale engraved on the upper support rod 19 is laser-engraved.

[0028] A cap 19a (shown only in Figure 11) is attached to the upper end of each upper support rod 19.

[0029] As shown in detail in Figures 8 and 9, the front and rear of the leveling device body 2 are equipped with lights 40 and a stop button 41, respectively. The lights 40 illuminate the front and rear, as shown in Figure 4. The direction of illumination of the lights 40 is adjustable. When the stop button 41 is pressed, the concrete leveling device 1 is configured to be stopped in an emergency.

[0030] A distance sensor 42 for detecting nearby objects is provided at the front of the leveling device body 2. As shown in Figures 10(a) and (b), the distance sensor 42 emits a sensor beam and, if it detects a nearby object within, for example, 50 cm in front, it is configured to issue a warning or to emergency stop the concrete leveling device 1.

[0031] The concrete leveling device 1 incorporates a control device that can control all or the main drive systems, and is equipped with a worker terminal 45 that can send commands to this control device via wireless communication.

[0032] (Explanation of construction work using concrete leveling device 1) Next, the construction work using the concrete leveling device 1 will be explained. When it comes to the laser screeding process, as shown in Figure 12, the concrete leveling device 1 is moved to the concrete floor surface 50, and the laser emitter 51 is set up nearby. The construction worker remotely operates the concrete leveling device 1 using the worker terminal 45 while visually recognizing the concrete leveling device.

[0033] The concrete leveling device 1 is remotely controlled and moves across the concrete floor surface 50 by the rotation of its traveling wheels 3. During this movement, it performs concrete compaction by the vibration of the vibrating blade 6 and leveling of the concrete floor surface 50 by the scraper 5.

[0034] During concrete compaction and leveling of the concrete floor surface 50, the laser receiver 29 receives laser light from the laser emitter 51, calculates the current height of the scraper 5 from the receiving position, and controls the drive of the lifting mechanism 20 so that the height of the scraper 5 is at the desired height. Through this control of the lifting mechanism 20, the concrete floor surface 50 is set to a predetermined height after the laser screed process.

[0035] (Effects of the embodiment) As described above, the concrete leveling device 1 comprises a leveling device body 2, running wheels 3 attached to the leveling device body 2, a scraper 5 which is a concrete leveling member supported by the leveling device body 2 via a support frame body 10, a lifting mechanism 20 that can move the scraper 5 up and down, and a laser receiver 29 mounted above the leveling device body 2. The laser receiver 29 is attached to an upper support rod 19 which is connected to a lower support rod 11 via a rod connecting portion 30. The rod connecting portion 30 consists of a lower flange portion 31 provided at the upper end of the lower support rod 11, an upper flange portion 32 provided at the lower end of the upper support rod 19, and a connecting part 33 that fits the outer circumferences of the lower flange portion 31 and the upper flange portion 32 when the lower flange portion 31 and the upper flange portion 32 are butted together.

[0036] Therefore, the end faces of the lower flange portion 31 and the upper flange portion 32, which have a larger area than the end faces of the lower support rod 11 and the upper support rod 19, abut against each other, and the outer circumferences (sides, top, and bottom) of both the lower flange portion 31 and the upper flange portion 32, which have a larger area, are fitted into the fitting groove 33b of the connecting part 33. As a result, the upper support rod 19 does not rattle due to the shaking of the lower support rod 11. In other words, the upper support rod 19 only shakes together with the lower support rod 11, so the shaking of the upper support rod 19 is suppressed, and the light receiving accuracy of the laser receiver 29 is improved.

[0037] The support frame 10 comprises a pair of left and right lower support rods 11, and a pair of horizontal connecting rods 12 that connect the pairs of lower support rods 11 and are arranged parallel to each other at intervals.

[0038] Therefore, compared to the case where a single horizontal connecting rod 12 connects the pair of lower support rods 11, the support frame 10 suppresses the swaying of each lower support rod 11. As a result, the swaying of the upper support rod 19 is further suppressed, and the light receiving accuracy of the laser receiver 29 is further improved. Also, for the same reason, the scraper 5, which is a concrete leveling member, can be firmly connected to the leveling device body 2.

[0039] The leveling device 1 includes a light 40 that illuminates the front and rear of the leveling device body 2, and a distance sensor 42 that detects nearby objects in front of the leveling device body 2. Therefore, even in construction sites with poor visibility, workers can visually check the condition of the front and rear of the concrete leveling device 1. Furthermore, it is possible to prevent situations in which workers come into contact with the concrete leveling device 1. If the distance sensor 42 detects a nearby object, the device can be controlled to, for example, issue a warning or stop the movement of the concrete leveling device 1, thereby preventing workers from coming into contact with the concrete leveling device 1.

[0040] (First variation) Figure 13 shows a first modified example of the above embodiment. In this first modified example, the upper horizontal connecting rod 12A of the pair of horizontal connecting rods 12 is formed from a frame structure in which multiple plates are connected in a frame shape. Specifically, the horizontal connecting rod 12A, which is a frame structure, is composed of a front plate 60, a rear plate 61, a side plate 62 connecting them, and multiple rib plates 63 arranged at intervals in the space surrounded by the top plate 60, the bottom plate 61, and the side plate 62. Since the other components are the same as in the above embodiment, the same reference numerals are used for the same components in the drawings, and redundant explanations are omitted.

[0041] In this first modification, since the horizontal connecting rod 12 is a single rod structure 12A, the rigidity is increased, and the swaying of the upper support rod 19 can be further suppressed. Both horizontal connecting rods 12 may also be made from frame structures 12A.

[0042] (Second variation) Figure 14 shows a second modified example of the above embodiment. In this second modified example, the scraper 5 and the blade plate 6a of the vibrating blade 6 are formed from polypenta acetal material. Since the other components are the same as in the above embodiment, the same reference numerals are used for the same components in the drawings, and redundant explanations are omitted.

[0043] In this second modification, the blade plates 6a of the scraper 5 and vibrating blade 6 are made of polypenta acetal material, which has excellent mechanical strength. As shown by the arrows in Figure 14, it is possible to increase the width of the scraper 5 and vibrating blade 6.

[0044] (Unmanned, automated construction system) In the above embodiment, the concrete leveling device 1 was operated remotely, but it can also be operated automatically without human intervention using a set program.

[0045] As shown in Figure 15, the unmanned, automated construction system 90, configured by a setting program, comprises a concrete leveling device 1 in which all or the main drive systems are controllable, a control device 91 that can communicate with and control the concrete leveling device 1, a work database 92 that can communicate with and supply data to the control device 91, and a worker terminal 93 that can communicate with and input data to the control device 91.

[0046] The control device 91 has a CPU, ROM, RAM, etc., and is equipped with a communication unit. The control device 91 has a communication means 91a for sending and receiving data, a storage means 91b for storing data, an automatic command means 91c for commanding the concrete leveling device 1 to automatically travel and perform automatic work, and an AI analysis means 91d for analyzing the data stored in the storage means 91b and / or the data accumulated in the work database 92 using artificial intelligence (AI).

[0047] The control device 91 and the concrete leveling device 1 communicate by recognizing each other via identification vibrations. The control program (firmware) executed by the concrete leveling device 1 is stored in rewritable memory and is configured to be upgradeable at any time. Furthermore, it is not limited to the language of the control program (firmware).

[0048] The worker terminal 93 may be a remote controller that uses a known wireless communication method, or it may be a smartphone or tablet-type information terminal that can communicate with the control device 91 using an internet connection such as Wi-Fi, and has downloaded and stored an application linked to the control system program.

[0049] Commands from the worker terminal 93 take precedence over commands from the control device 91 during automated construction. This is to ensure that responses can be made in emergencies.

[0050] The worker inputs necessary work information into the control device 91 in advance using the worker terminal 93. This includes travel speed, travel time, travel stop time, travel route, etc.

[0051] Furthermore, although the work database 92 is shown as being constructed as external memory, the control device 91 may also be configured to acquire work information from the work database 92 located on the cloud via Wi-Fi (not shown) in the field environment.

[0052] The control device 91 and the work database 92 are equipped with artificial intelligence (AI), and the operator of the control device 91 may configure the system to automate the setting of various parameters by storing the parameters to be set (temperature, humidity, concrete material, etc.) in the work database along with the date and time, site name, and construction personnel at the site, thereby strongly promoting the AI-ization of concrete floor construction data.

[0053] Even in an unmanned, automated construction system, the same operations as the remotely controlled concrete leveling device described above can be performed. Alternatively, the concrete leveling device 1 may be operated by a construction worker by attaching a handle or the like to the leveling device body.

[0054] In the above embodiment, the running wheel 3 was a tire, but any configuration that can transmit rotational force to a concrete surface is acceptable, such as a caterpillar track.

[0055] In the above embodiment, the concrete leveling device 1 was used to level the concrete surface, but it can also be applied to leveling mortar surfaces and the like. The above embodiment shows an example of concrete floor construction, but is not limited to this.

[0056] In the above embodiment, the concrete leveling members were a scraper 5 and a vibrating blade 6, but it may also be a scraper 5 alone, or any member that contributes to leveling the concrete floor surface 50, and various combinations are possible.

[0057] In the above embodiment, the running wheel 5 was a wheel with teeth formed on its outer circumference, but any configuration that can transmit rotational force to the concrete surface is acceptable, and for example, it may be a caterpillar track.

[0058] Although each embodiment has been described in detail above, the invention is not limited to any particular embodiment, and various modifications and changes are possible within the scope described in the claims.

[0059] Furthermore, the present invention may include at least the following embodiments. These embodiments may be adopted separately or in combination with each other. (1) The support frame is a concrete leveling device having a pair of left and right lower support rods and a pair of horizontal connecting rods that connect the pair of lower support rods and are arranged parallel to each other at intervals. (2) At least one of the pair of horizontal connecting rods is a concrete leveling device composed of a frame structure formed by connecting a plurality of plates in a frame shape. (3) The concrete leveling member is a concrete leveling device formed from polypencore acetal material. (4) A concrete leveling device having lights that illuminate the front and rear of the leveling device body, and a distance sensor that detects nearby objects in front of the leveling device body. [Explanation of Symbols]

[0060] 1. Concrete leveling device 2. Leveling device main body 3 wheels 5. Scraper (concrete leveling tool) 6. Vibration blade (concrete leveling member) 10 Support frame 11 Downward support rod 12 Horizontal connecting rods 12A Frame Structure 20 Lifting mechanism 30 Rod connection section 31 Lower flange section 32 Upper flange section 33 Connecting parts 45. Worker terminals 90 Construction System 91 Control device 92 Work Database 93. Worker terminal (input means)

Claims

1. The leveling device comprises a leveling device body, running wheels attached to the leveling device body, a concrete leveling member supported by the leveling device body via a support frame, a lifting mechanism for moving the concrete leveling member up and down, and a laser receiver mounted above the leveling device body. The laser receiver is attached to an upper support rod which is connected to a lower support rod via a rod connecting portion. The concrete leveling device is characterized in that the rod connecting portion comprises a lower flange portion provided at the upper end of the lower support rod, an upper flange portion provided at the lower end of the upper support rod, and a connecting component that fits the outer circumferences of the lower flange portion and the upper flange portion when the lower flange portion and the upper flange portion are butted together.

2. The concrete leveling device according to claim 1, characterized in that the support frame body comprises a pair of left and right lower support rods and a pair of horizontal connecting rods that connect the pair of lower support rods and are arranged parallel to each other at intervals.

3. The concrete leveling device according to claim 1, characterized in that at least one of the pair of horizontal connecting rods is made of a frame structure formed by connecting a plurality of plates in a frame shape.

4. The concrete leveling device according to claim 1, characterized in that the concrete leveling member is formed from polypencore acetal material.

5. The concrete leveling device according to claim 1, characterized in that it includes a light that illuminates the front and rear of the leveling device body, and a distance sensor that detects nearby objects in front of the leveling device body.

6. A construction system comprising: a concrete leveling vibrator as described in claim 1; a control device capable of controlling the concrete leveling vibrator; a work database capable of communicating with the control device and supplying data to the control device; and an input device for inputting data to the control device.

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