Concrete vibrator

Abstract

To provide a concrete vibrator capable of efficiently compacting cast concrete and enabling proper quality control.SOLUTION: A concrete vibrator according to the present disclosure comprises: a rod-shaped vibrating body including a vibration source inside; a hose connected to a base end side of the vibrating body; and a control device configured to detect the presence of cast concrete using sensors and to control the power supply to the vibration source. The sensor includes: a first sensor which has a first electrode positioned at a distal end side of the vibrating body, and detects the start of insertion of the vibrating body into the cast concrete; and a second sensor which has a second electrode positioned on the base end side of the vibrating body compared to the first electrode, and detects the vibrating body having been inserted into the cast concrete to a predetermined depth. An insulating section is provided between the first electrode and the second electrode.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present disclosure relates to a concrete vibrator. [Background technology]

[0002] 2. Description of the Related Art Conventionally, as a concrete vibrator used for compacting poured concrete, a rod-shaped concrete vibrator capable of automatically controlling the operation of the vibrator by detecting poured concrete has been known (for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2017-014888 A Summary of the Invention [Problem to be solved by the invention]

[0004] Here, when constructing deep parts of a concrete structure, the concrete is compacted in multiple layers, a process known as "pouring." For example, when constructing the second and subsequent layers above the first layer, which is the bottom layer, it is necessary to insert a rod vibrator 10 cm or more into the previously formed lower layer of concrete so that the lower and upper layers are integrated.

[0005] However, in this type of pouring work, whether the rod vibrator has reached 10 cm or more into the previous layer of concrete is often left to the worker's judgment, and there is room for improvement in terms of quality control.

[0006] Therefore, the present disclosure has been made in consideration of the above problems, and its purpose is to provide a concrete vibrator that efficiently compacts poured concrete and enables proper quality control. [Means for solving the problem]

[0007] According to the present disclosure, there is provided a concrete vibrator comprising a rod-shaped vibrating body with an internal vibration source, a hose connected to the base end side of the vibrating body, and a control device that detects the presence of poured concrete with a sensor and controls the supply of power to the vibration source, wherein the sensor includes a first sensor having a first electrode located on the tip side of the vibrating body and detecting the start of insertion of the vibrating body into the poured concrete, and a second sensor having a second electrode located on the base end side of the vibrating body further than the first electrode and detecting that the vibrating body has been inserted to a predetermined depth into the poured concrete, and an insulating portion is provided between the first electrode and the second electrode. Effect of the Invention

[0008] According to the present disclosure, a concrete vibrator can be provided that efficiently compacts poured concrete and enables proper quality control. [Brief description of the drawings]

[0009] [Figure 1] FIG. 1 is a diagram illustrating an example configuration of a concrete vibrator system according to an embodiment of the present disclosure. [Diagram 2] 2 is an enlarged view of a vibrating body of the concrete vibrator according to the embodiment. FIG. [Diagram 3] FIG. 2 is a block diagram of the concrete vibrator according to the embodiment. [Figure 4] 4 is a flowchart showing a series of controls in the concrete vibrator according to the embodiment. FIG. [Diagram 5] 1 is a diagram showing an example of a pouring operation using a concrete vibrator according to the same embodiment. FIG. [Figure 6] FIG. 6 is a diagram showing a state in which the vibrating body is inserted deeper into poured concrete than in the state shown in FIG. 5. [Figure 7] FIG. 13 is a diagram showing an example configuration of a concrete vibrator system according to another embodiment of the present disclosure. [Figure 8]FIG. 8 is a block diagram of the concrete vibrator according to the embodiment of FIG. [Figure 9] FIG. 9 is a flow chart showing a series of controls in the concrete vibrator according to the embodiment shown in FIGS. [Figure 10] FIG. 13 is a block diagram of a concrete vibrator system according to yet another embodiment of the present disclosure. [Figure 11] FIG. 13 is a block diagram of a concrete vibrator system according to yet another embodiment of the present disclosure. [Figure 12] FIG. 13 is a block diagram of a concrete vibrator system according to yet another embodiment of the present disclosure. [Figure 13] FIG. 13 is a block diagram of a concrete vibrator system according to yet another embodiment of the present disclosure. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Hereinafter, preferred embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. In this specification and the drawings, components having substantially the same functional configurations are denoted by the same reference numerals, and redundant description will be omitted.

[0011] FIG. 1 shows an overview of a concrete vibrator system 100 according to this embodiment, and FIG. 2 shows an enlarged view of a vibrator 1. FIG. 3 is a block diagram showing electrical connections. The concrete vibrator system 100 includes a rod-shaped vibrator 1 having a vibration generating source therein, a hose 2 connected to the base end side of the vibrator 1, and a control device 3 connected to the other end side of the hose 2. Note that a concrete vibrator is, for example, a machine that has an eccentric weight inside and generates vibration by rotating the eccentric weight, and in particular, a machine that is inserted into concrete and directly vibrates the concrete itself is also called an internal vibrator. A cable 7 (cab-tyre cable) is connected to the hose 2 via a switch case 6. A switch for turning on / off the vibration and for switching the direction of rotation of the vibrator is built into the switch case 6.

[0012] The control device 3 includes a control circuit 31, a first current detection circuit 32A, a second current detection circuit 32B, and an insulated DC-DC converter 33. A high-frequency inverter 4, which is the driving power source for the vibrator, is connected to the control circuit 31 and controls the power supply to the vibrator.

[0013] A first electrode 11A made of a conductor such as iron is provided on the surface of the tip end of the vibrating body 1, and a first sensor wire 12A is connected to the back side of the first electrode 11A (inside the vibrating body). The first sensor wire 12A passes through the inside of the hose 2 and has the other end connected to a first current detection circuit 32A in the control device 3. On the other hand, a third electrode 5 made of an electric clip or the like is connected to the first current detection circuit 32A via a lead wire, and the third electrode 5 (electrical clip) is exposed to the outside of the control device 3 so that it can be connected to reinforcing bars R or the like arranged in the poured concrete C. The two electrodes that are the first sensor that detects the start of insertion of the vibrating body 1 into the poured concrete C are the first electrode 11A provided on the surface of the tip end of the vibrating body 1 and the third electrode 5 (electrical clip).

[0014] An insulating section 13 made of an insulator such as rubber, plastic, or glass is provided on the surface of the vibrating body 1 closer to the base end than the first electrode 11A, and a second electrode 11B made of a conductor such as iron is provided further closer to the base end than the insulating section 13. The second electrode 11B is provided at a position where it comes into contact with the upper layer when the tip of the vibrating body 1 is inserted to an appropriate depth (for example, 10 cm) of the lower layer concrete during pouring work. That is, when the thickness of the upper layer is 50 cm, it is disposed at a position 60 cm from the tip of the vibrating body 1. In this case, the "appropriate pouring depth d" shown in FIG. 2 is 60 cm. The position of the second electrode 11B may be any of the surfaces of the vibrating body 1, the hose 2, or the connection part (joint) thereof, but in this example, it is provided at the connection part. A second sensor wire 12B is connected to the back side of the second electrode 11B (inside the vibrating body). The second sensor wire 12B passes through the inside of the hose 2 and has the other end connected to a second current detection circuit 32B in the control device 3. On the other hand, the second current detection circuit 32B is connected via a lead wire to the third electrode 5. The two electrodes that constitute the second sensor for detecting that the vibrating body 1 has reached a predetermined depth in the poured concrete C are composed of the second electrode 11B provided on the base end surface of the vibrating body 1 and the third electrode 5 (electrical clip).

[0015] The first electrode 11A, the insulating portion 13, and the second electrode 11B are each provided over the entire circumferential direction (entire circumference) of the vibrating body 1, but are not limited to this and may be provided only on a part of the circumferential direction.

[0016] The isolated DC-DC converter 33 has a primary side connected to the high-frequency inverter 4 and a secondary side connected to the first current detection circuit 32A and the second current detection circuit 32B, respectively, and transforms the output voltage of the high-frequency inverter 4 used as the vibrator power supply. In this embodiment, the isolated DC-DC converter 33 connected to the high-frequency inverter 4, which is the vibrator power supply, is used as the power supply for the voltage applied to the two electrodes, but a dedicated battery independent of the vibrator power supply or a commercial power supply can also be used (not shown).

[0017] The first current detection circuit 32A is a circuit that detects the current that flows when the first electrode 11A and the third electrode 5 that constitute the first sensor are conductive via the moisture in the poured concrete C and the reinforcing bar R, and transmits a current detection signal to the control circuit 31.The first current detection circuit 32A is configured to send a current detection signal to the control circuit 31 when a current flowing between the first electrode 11A and the third electrode 5 provided on the tip surface of the vibrating body 1 is detected.

[0018] The second current detection circuit 32B is a circuit that detects the current that flows when the second electrode 11B and the third electrode 5 that constitute the second sensor are conductive via the moisture in the poured concrete C and the reinforcing bar R, and transmits a current detection signal to the control circuit 31.The second current detection circuit 32B is configured to send a current detection signal to the control circuit 31 when a current flowing between the second electrode 11B and the third electrode 5 provided on the base end surface of the vibrating body 1 is detected.

[0019] The control circuit 31 is a circuit that controls the on / off of the power supply to the vibration source, and is set to control the power supply to the vibrator while receiving a current detection signal from the first current detection circuit 32A, and to control the power supply to the vibrator to be stopped while not receiving a current detection signal. When the control circuit 31 receives a current detection signal from the second current detection circuit 32B, the control circuit 31 temporarily stops or weakens the power supply to the vibrator, and controls the power supply to continue to the vibrator. The control circuit 31 may temporarily (for a preset fixed time) stop or weaken the power supply to the vibrator at the timing when the state of receiving the current detection signal from the second current detection circuit 32B changes to the state of not receiving the current detection signal, and controls the power supply to the vibrator to continue.

[0020] FIG. 4 is a diagram for explaining an outline of the compaction work of poured concrete C using the concrete vibrator of the present invention. First, the worker connects the third electrode 5 (electrical clip) connected to the current detection circuit 32 of the control device 3 to the reinforcing bar R or the like arranged in the poured concrete C. Next, the worker holds the hose 2 of the concrete vibrator, hangs the vibrator 1 in midair, and turns on the main power supply of the control device 3 (power ON). At this time, although a voltage is applied from the insulating DC-DC converter 33 to the first electrode 11A and the third electrode 5 on the tip side of the vibrator 1, the first electrode 11A of the vibrator 1 is not in contact with anything, and no current flows between the first electrode 11A and the third electrode 5 in an insulated state, no current detection signal is sent from the current detection means (first current detection circuit 32A) to the control circuit 31, and the control circuit 31 does not supply power to the vibrator. For this reason, the operation of the vibrator is stopped, and the vibrator 1 is not vibrating. In Fig. 4, the control device 3 performs a continuity determination process (S1) for the first sensor line 12A. When the first electrode 11A of the vibrating body 1 is not in contact with anything, the result of the continuity determination process is "No". The control device 3 repeatedly executes the continuity determination process (S1) for the first sensor line 12A until the result of the process becomes "Yes". Note that when the first electrode 11A of the vibrating body 1 is not in contact with anything, naturally no current flows between the second electrode 11B and the third electrode 5.

[0021] Next, as shown in FIG. 5, the worker gradually inserts the vibrating body 1 into the poured concrete C while suspending it from the tip side. Since a voltage is applied from the insulated DC-DC converter 33 to the first electrode 11A and the third electrode 5 located at the tip side of the vibrating body 1, when the first electrode 11A touches the poured concrete C, it conducts with the third electrode 5 through the moisture in the poured concrete C and the reinforcing bar R in the poured concrete C, and a current flows. This current is detected by the first current detection means (first current detection circuit 32A) and a current detection signal is transmitted to the control circuit 31. The control circuit 31, which has received the current detection signal, controls the supply of power to the vibrator. In FIG. 4, when the result of the continuity determination process (S1) of the first sensor line 12A becomes "Yes", a process of rotating the inverter output forward is executed (S2), and the vibrating body 1 starts vibrating. In this way, when the tip surface (first electrode 11A) of the vibrating body 1 comes into contact with the poured concrete C, power is automatically supplied to the vibrator, and the vibrating body 1 starts vibrating.

[0022] After S2, the control device 3 performs a continuity determination process (S2.5) for the first sensor line 12A, and if the determination result is "No", performs a process of S8 described below. If the determination result of the process of S2.5 is "Yes", a continuity determination process (S3) for the second sensor line 12B is performed. The continuity determination process (S3) for the second sensor line 12B is repeatedly performed while the determination result is "No". In other words, the continuity determination process (S3) for the second sensor line 12B is repeatedly performed until the determination result becomes "Yes". Note that the process of S2.5 is not a required configuration and can be omitted.

[0023] As shown in FIG. 6, when the vibrator 1 advances from the second layer (upper layer) of poured concrete C into the first layer (lower layer) of concrete and reaches a depth of 10 cm or more, which is an appropriate depth for pouring work, the second electrode 11B comes into contact with the upper layer of concrete C. When the second electrode 11B touches the poured concrete C, it conducts with the third electrode 5 through the moisture in the poured concrete C and the reinforcing bar R in the poured concrete C, and a current flows. This current is detected by the second current detection means (second current detection circuit 32B) and transmits a current detection signal to the control circuit 31. The control circuit 31, which has received the current detection signal, temporarily stops the power supply to the vibrator and then controls to resume the supply. That is, in FIG. 4, when the result of the continuity determination process (S3) of the second sensor wire 12B becomes "Yes", the control device 3 stops the inverter output for a predetermined time (1 second, 0.5 seconds, etc.) (S4) and rotates the inverter output forward again (S5).

[0024] Next, the control device 3 repeatedly executes the continuity determination process (S6) for the second sensor wire 12B until the determination result becomes "No" (while the determination result is "Yes") During that time, the vibrating body 1 is positioned at a depth of 10 cm or more, which is an appropriate depth for the overlapping work, and vibrates continuously.

[0025] After vibrating for an appropriate time, the worker pulls out the vibrating body 1 from the poured concrete C. In FIG. 4, when the determination result of the continuity determination process (S6) of the second sensor wire 12B is "No", the control device 3 executes the continuity determination process (S7) of the first sensor wire 12A. When the determination result is "Yes", the control device 3 executes the continuity determination process (S6) of the second sensor wire 12B again. On the other hand, when the determination result is "No", the inverter output is stopped (S8). Then, the control device 3 determines whether the power is OFF (S9), and when the determination result is "No", the process returns to S1, and when the determination result is "Yes", the work is stopped.

[0026] In the operation of pulling out the vibrating body 1 from the poured concrete C, the vibrator of the vibrating body 1 continues to operate until the first electrode 11A at the tip side of the vibrating body 1 is completely pulled out from the poured concrete C, so that the vibrating body 1 can be pulled out while vibrating.

[0027] As described above, when the vibrating body 1 reaches the appropriate pouring depth d, the vibration of the vibrating body 1 changes temporarily, and the vibration is transmitted to the concrete pourer through the hose 2, making it possible to make the concrete pourer recognize that the vibrating body 1 has reached the appropriate pouring depth d. In other words, the concrete vibrator system 100 of this embodiment has an appropriate pouring depth confirmation function. This can improve the accuracy of the work and the work efficiency compared to, for example, a method in which a mark is attached to a rod-shaped vibrator or a hose 2 with tape or the like, and the depth of the vibrating body 1 is confirmed using the mark as a guide, or the mark and the poured concrete C are photographed with a camera and the image is left as a record. As a result, it is possible to efficiently compact the poured concrete C and perform appropriate quality control. In the above example, the vibration is temporarily stopped, but this is not limited to this, and the strength of the vibration may be temporarily weakened or temporarily strengthened. In other words, the power supply to the vibrating body 1 may be adjusted to change the rotation speed and rotation direction of the eccentric weight inside the vibrating body, thereby changing the strength of the vibration. In addition, an insulating portion 13 is provided between the first electrode 11A provided on the tip side of the vibrating body 1 and the second electrode 11B provided on the base end side, thereby preventing the second electrode 11B from being energized at an inappropriate timing. This makes it possible to detect with higher accuracy that the vibrator has reached the appropriate overlap depth d.

[0028] As described above, the concrete vibrator of this embodiment is a concrete vibrator including a rod-shaped vibrating body 1 with a vibration source inside, a hose 2 connected to the base end side of the vibrating body 1, and a control device 3 that detects the presence of poured concrete C with a sensor and controls the supply of power to the vibration source, the sensor including a first sensor having a first electrode 11A located on the tip side of the vibrating body 1 and detecting the start of insertion of the vibrating body 1 into the poured concrete C, and a second sensor having a second electrode 11B located on the base end side of the vibrating body 1 relative to the first electrode 11A and detecting that the vibrating body 1 has been inserted to a predetermined depth into the poured concrete C, and an insulating section 13 is provided between the first electrode 11A and the second electrode 11B. With this configuration, it is possible to efficiently compact the poured concrete C and perform appropriate quality control.

[0029] Furthermore, in this embodiment, the control device 3 may start vibration of the vibrating body 1 when the first sensor detects the start of insertion of the vibrating body 1 into the poured concrete C, and may change the vibration of the vibrating body 1 when the second sensor detects that the vibrating body 1 has been inserted to a predetermined depth into the poured concrete C. According to this configuration, when the vibrating body 1 reaches the appropriate pouring depth d, the vibration of the vibrating body 1 temporarily changes, so that the vibration is transmitted to the concrete pourer via the hose 2, and the concrete pourer can recognize that the vibrating body 1 has reached the appropriate pouring depth d.

[0030] In this embodiment, the control device 3 may temporarily stop the vibration of the vibrating body 1 and then resume the vibration when the second sensor detects that the vibrating body 1 has been inserted to a predetermined depth into the poured concrete C. With this configuration, the temporary suspension and resumption of vibration can make the concrete pourer recognize that the vibrating body 1 has reached the appropriate pouring depth d.

[0031] In this embodiment, the control device 3 may temporarily change the vibration intensity of the vibrating body 1 when the second sensor detects that the vibrating body 1 has been inserted to a predetermined depth into the poured concrete C. With this configuration, by increasing or decreasing the vibration intensity, the pourer can be made to recognize that the vibrating body 1 has reached the appropriate pouring depth d.

[0032] In this embodiment, the control device 3 is configured to detect whether the vibrating body 1 is poured concrete C When the second sensor detects that the vibrating body 1 has been inserted to a predetermined depth, the rotation direction of the eccentric weight inside the vibrating body 1 may be changed. According to this configuration, by changing the rotation direction of the eccentric weight, the concrete pourer can be made to recognize that the vibrating body 1 has reached the appropriate pouring depth d.

[0033] In this embodiment, a transmitting means 17 for outputting information detected by the first sensor and the second sensor to an external device may be further provided. With such a configuration, it is possible to transmit to an external device information that the vibrating body 1 has come into contact with the poured concrete C and that the vibrating body 1 has reached the appropriate pouring depth d, thereby notifying an operator at a remote location.

[0034] In this embodiment, a storage means for storing information detected by the first sensor and the second sensor may be further provided. With such a configuration, the contact of the vibrating body 1 with the poured concrete C, the reaching of the appropriate pouring depth d, and the timing (time, etc.) thereof can be stored in the storage means.

[0035] In this embodiment, a display means 16 for displaying information detected by the first sensor and the second sensor may be further provided. With such a configuration, the display means 16 can display that the vibrating body 1 has come into contact with the poured concrete C, that the vibrating body 1 has reached the appropriate pouring depth d, and the timing (time, etc.) of these.

[0036] Fig. 7 shows an overview of a concrete vibrator system 200 according to another embodiment, and Fig. 8 is a block diagram showing electrical connections. In this case, since it is necessary to control the output from the high-frequency inverter 4 to rotate in the forward or reverse direction using a signal from the control device 3, a control circuit 31 is disposed inside the inverter (the inverter 4 may be built into the control device 3 of the above embodiment).

[0037] In this example, a spiral groove is provided on the outer surface of the vibrating body 1. The control device 3 may also be provided with a changeover switch for switching the rotation direction of the eccentric weight attached inside the vibrating body 1 between right and left. By changing the rotation direction of the eccentric weight, the direction of vibration propagation to the concrete changes, making it possible to generate vibrations effective for compaction over a wide range and efficiently expel air bubbles entrapped in the concrete.

[0038] In this example, after reaching the appropriate overlap depth d, the vibrator is stopped for a certain period of time and the rotation direction of the eccentric weight of the vibrator is reversed. Specifically, as shown in Fig. 9, when the result of the process (S13) for determining the continuity of the second sensor wire 12B is "Yes", the control device 3 stops the inverter output for a predetermined period of time (1 second, 0.5 seconds, etc.) (S14) and reverses the inverter output (S15). Note that the processes other than S15 are the same as those in the above embodiment, and therefore will not be described.

[0039] 10, 11, 12 and 13 show still another embodiment.

[0040] In the example of FIG. 10, the result of the continuity determination process of the first sensor wire 12A having the first electrode 11A, the result of the continuity determination process of the second sensor wire 12B having the second electrode 11B, or information on the vibration of the vibrator 1 (presence or absence of vibration, intensity), etc. can be output to the storage medium 15 (storage means) and the display means 16, etc., via the external output terminal 14. For example, based on the result of the continuity determination process of the first sensor wire 12A and the result of the continuity determination process of the second sensor wire 12B, information on whether the vibrator 1 is in contact with the poured concrete C, information on whether the vibrator 1 has reached the appropriate pouring depth d, information on the vibration of the vibrator 1 (presence or absence of vibration, intensity), etc. can be stored in the storage medium 15 or displayed on the display means 16. The storage medium 15 may be a removable medium from the concrete vibrator body, such as a memory card or a USB memory. The display means 16 may be an LED monitor, a touch panel, etc.

[0041] 11, the result of the continuity determination process of the first sensor wire 12A having the first electrode 11A, the result of the continuity determination process of the second sensor wire 12B having the second electrode 11B, and information based thereon can be transmitted to an external device having a receiving means 18 via the external output terminal 14 and the transmitting means 17. Then, the received information (information on whether the vibrating body 1 is in contact with the poured concrete C, information on whether the vibrating body 1 has reached the appropriate pouring depth d, information on the vibration of the vibrating body 1 (presence or absence of vibration, strength), etc.) can be stored in the storage medium 15 or displayed on the display means 16.

[0042] 12 and 13, similarly to the example of Fig. 8, the control circuit 31 is disposed inside the inverter (the inverter 4 may be built into the control device 3). Also in the examples of Fig. 12 and 13, information on whether the vibrating body 1 is in contact with the poured concrete C, information on whether the vibrating body 1 has reached the appropriate pouring depth d, information on the vibration of the vibrating body 1 (presence or absence of vibration, intensity, rotation direction of the eccentric weight), etc. can be stored in the storage medium 15 or displayed on the display means 16.

[0043] Although the preferred embodiment of the present disclosure has been described in detail above with reference to the attached drawings, the technical scope of the present disclosure is not limited to such examples. It is clear that a person having ordinary knowledge in the technical field of the present disclosure can conceive of various modified or amended examples within the scope of the technical ideas described in the claims, and it is understood that these also naturally belong to the technical scope of the present disclosure.

[0044] The device described in this specification may be realized as a single device, or may be realized by a plurality of devices (e.g., cloud servers) partially or entirely connected via a network. For example, the control device 3 may be realized by different servers connected to each other via a network.

[0045] The series of processes performed by the device described in this specification may be realized using any of software, hardware, and a combination of software and hardware. A computer program for realizing each function of the control device 3 according to this embodiment can be created and installed in a PC or the like. A computer-readable recording medium in which such a computer program is stored can also be provided. The recording medium is, for example, a magnetic disk, an optical disk, a magneto-optical disk, a flash memory, etc. The above computer program may also be distributed, for example, via a network, without using a recording medium.

[0046] In addition, the processes described herein using flowchart diagrams do not necessarily have to be performed in the order shown. Some process steps may be performed in parallel. Additional process steps may be employed, and some process steps may be omitted.

[0047] In addition, the effects described in this specification are merely descriptive or exemplary and are not limiting. In other words, the technology according to the present disclosure may achieve other effects that are apparent to a person skilled in the art from the description of this specification, in addition to or in place of the above effects.

[0048] Note that the following configurations also fall within the technical scope of the present disclosure. (Item 1) A rod-shaped vibrating body 1 having a vibration source therein; A hose 2 connected to the base end side of the vibrator 1; A control device 3 that detects the presence of poured concrete C by a sensor and controls the power supply to the vibration source. The sensor comprises: a first sensor having a first electrode 11A located at the tip side of the vibration body 1 and configured to detect the start of insertion of the vibration body 1 into poured concrete C; a second sensor having a second electrode 11B located closer to the base end of the vibrating body 1 than the first electrode 11A and configured to detect that the vibrating body 1 has been inserted to a predetermined depth into poured concrete C; A concrete vibrator, wherein an insulating portion 13 is provided between the first electrode 11A and the second electrode 11B. (Item 2) The control device 3 is When the first sensor detects the start of insertion of the vibrating body 1 into the poured concrete C, the vibrating body 1 starts vibrating, 2. The concrete vibrator according to claim 1, wherein the vibration of the vibrating body is changed when the second sensor detects that the vibrating body has been inserted into the poured concrete to a predetermined depth. (Item 3) The control device 3 is The concrete vibrator of claim 2, wherein when the second sensor detects that the vibrating body 1 has been inserted to a predetermined depth into the poured concrete C, the vibration of the vibrating body 1 is temporarily stopped and then vibration is resumed. (Item 4) The control device 3 is 3. The concrete vibrator according to claim 2, wherein when the second sensor detects that the vibrating body 1 has been inserted to a predetermined depth into the poured concrete C, the vibration intensity of the vibrating body 1 is temporarily changed. (Item 5) The control device 3 is A concrete vibrator as described in claim 2, wherein when the second sensor detects that the vibrating body 1 has been inserted to a predetermined depth into the poured concrete C, the rotation direction of an eccentric weight inside the vibrating body 1 is changed. (Item 6) 3. The concrete vibrator according to claim 1, further comprising a transmitting means for outputting information detected by the first sensor and the second sensor to an external device. (Item 7) 3. The concrete vibrator according to claim 1, further comprising a storage means for storing information detected by the first sensor and the second sensor. (Item 8) 3. The concrete vibrator according to claim 1, further comprising a display means for displaying information detected by the first sensor and the second sensor. [Explanation of symbols]

[0049] 1. Vibration body 11A 1st electrode 11B 2nd electrode 12A 1st sensor wire 12B Second sensor wire 13 Insulation 14 External output terminal 15 Storage medium 16 Display means 17 Transmission Method 18 Receiving means 2 Hose 3. Control device 31 Control circuit 32A First current detection circuit 32B Second current detection circuit 33 Isolated DC-DC Converter 4 High frequency inverter 5 Electric Clip (3rd Electrode) 100 Concrete Vibrator System 200 Concrete Vibrator System C. Cast concrete R Reinforcement bar

Claims

1. A rod-shaped vibrating body having a vibration source therein; A hose connected to a base end side of the vibrator; A control device that detects the presence of poured concrete by a sensor and controls the power supply to the vibration source. The sensor comprises: A first sensor having a first electrode located on a tip side of the vibration body and detecting the start of insertion of the vibration body into poured concrete; a second sensor having a second electrode located closer to the base end of the vibration body than the first electrode and configured to detect that the vibration body has been inserted to a predetermined depth into poured concrete; An insulating portion is provided between the first electrode and the second electrode, The control device includes: When the first sensor detects the start of insertion of the vibrator into the poured concrete, the vibration of the vibrator is started. A concrete vibrator that changes the vibration of the vibrating body when the second sensor detects that the vibrating body has been inserted to a predetermined depth into poured concrete.

2. The control device includes:

2. The concrete vibrator according to claim 1, wherein when the second sensor detects that the vibrating body has been inserted to a predetermined depth into the poured concrete, the vibration of the vibrating body is temporarily stopped and then resumed.

3. The control device includes:

2. The concrete vibrator according to claim 1, wherein the vibration intensity of the vibrator is temporarily changed when the second sensor detects that the vibrator has been inserted to a predetermined depth into the poured concrete.

4. The control device includes:

2. The concrete vibrator according to claim 1, wherein the rotation direction of an eccentric weight inside the vibrator is changed when the second sensor detects that the vibrator has been inserted to a predetermined depth into the poured concrete.

5. 3. The concrete vibrator according to claim 1, further comprising a transmitting means for outputting information detected by the first sensor and the second sensor to an external device.

6. 3. The concrete vibrator according to claim 1, further comprising a storage means for storing information detected by the first sensor and the second sensor.

7. 3. The concrete vibrator according to claim 1, further comprising a display means for displaying information detected by the first sensor and the second sensor.

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