JP6535608B2 - Ground improvement construction machine - Google Patents

Description

  The present invention relates to a ground improvement construction machine which improves ground at a rotating attachment portion.

  As an attachment part which improves ground by rotating the ground improvement construction machine of this type, there are a stirring shaft (see, for example, Patent Document 1) for stirring and improving the ground and a casing pipe for sand pile construction (see, for example, Patent Document 2).

  In addition, in the construction by the rotating attachment part of the ground improvement construction machine, control of the ground improvement construction machine is performed using various control devices such as sensors such as inclinometers and pressure gauges, solenoid valves, cylinders, etc. The on / off control of the switch of the device is performed by sending a signal by wire.

Japanese Patent Application Laid-Open No. 7-158056 Japanese Patent Application Laid-Open No. 8-284146

  However, in the above-described conventional ground improvement construction machine, when trying to operate the control device installed in the rotating attachment unit, it is difficult to transmit a signal because the connection unit is disconnected due to the rotation of the attachment unit. In addition, even if signals can be transmitted by wire to the control device installed in the rotating attachment unit, problems such as an increase in assembly time and disassembly time due to wiring work and an increase in the risk of electrical leakage from the connection occur. .

  Then, this invention was made in order to solve the above-mentioned subject, and provides the ground improvement construction machine which can control a control apparatus by transmission and reception of light irrespective of transmission / reception of the signal by a wire communication. To aim.

According to the first aspect of the present invention, the control device is provided on the stirring shaft or casing pipe for sand pile construction for rotating and improving the agitation of the ground, and the control shaft controls the casing pipe for sand stirring shaft or sand pile construction. In the ground improvement construction machine performing ground improvement, a light emitter is provided on the upper side of the air supply piping provided in the stirring shaft or in the casing pipe for sand pile construction , and on the lower side of the air supply piping. A light receiver for receiving light from the light emitter and controlling the control device is provided.

  The invention of claim 2 is the ground improvement construction machine according to claim 1, characterized in that the control device is controlled by the illuminance of the light.

  The invention of claim 3 is the ground improvement construction machine according to claim 1, characterized in that the control device is controlled by the number of times of light reception.

  The invention of claim 4 is the ground improvement construction machine according to any one of claims 1 to 3, wherein light from the light emitter is received to turn on / off the switch of the control device. It is characterized by

As described above, according to the first to third aspects of the present invention, the upper side of the air supply piping provided in the stirring shaft or in the casing pipe for sand pile construction for improving ground by rotating the ground improvement construction machine. And a light receiver for receiving light from the light emitter to control the control device at the lower side of the air supply piping , so that light transmission can be performed without using wired signal transmission / reception. The control device can be controlled simply and reliably by light reception. As a result, highly efficient construction becomes possible, and the conventional complicated wiring work for signal transmission and reception becomes unnecessary, and accordingly, cost reduction can be achieved. In particular, by using the air supply piping in the stirring shaft or in the casing pipe for sand pile construction, the space in the air supply piping can be used as the light path of the light emitter and the light receiver, and the light path is newly added. As it is not necessary to add a new one, cost reduction can be further achieved.

  According to the invention of claim 4, the light from the light emitter is received and the switch of the control device is controlled to be ON / OFF, so that the control device can be controlled by the light transmission / reception without using the wired signal transmission / reception. The switch can be turned on and off easily and reliably. As a result, highly efficient construction becomes possible, and the conventional complicated wiring work for signal transmission and reception becomes unnecessary, and accordingly, cost reduction can be achieved.

It is a side view showing a ground improvement construction machine of a 1st embodiment of the present invention. It is a front view of the front-end | tip part of the stirring shaft used for the ground improvement construction machine of the said 1st Embodiment. It is a schematic block diagram of the light emitter and the light receiver which were provided in the said stirring shaft. It is a schematic block diagram of the light emitter and the light receiver which were provided in the stirring shaft of 2nd Embodiment of this invention. (A)-(c) is explanatory drawing which shows the state of each action | operation of the light emitter of the said 2nd Embodiment, and a light receiver. It is a side view showing a ground improvement construction machine of a 3rd embodiment of the present invention. It is a schematic block diagram of the light emitter and the light receiver which were provided in the casing pipe used for the ground improvement construction machine of the said 3rd Embodiment.

  Hereinafter, embodiments of the present invention will be described based on the drawings.

  FIG. 1 is a side view showing a ground improvement construction machine according to a first embodiment of the present invention, FIG. 2 is a front view of a tip portion of a stirring shaft used in the ground improvement construction machine, and FIG. 3 is light emission provided on the stirring shaft It is a schematic block diagram of a sensor and a receiver.

  As shown in FIGS. 1 to 3, the ground improvement construction machine 10 is a two-shaft type of rotary press-fit type that stirs and improves the ground 50 by the compressed air A and the slurry improvement material S, and rotates to improve the ground. A light emitter 45 and a light receiver 46 described later are provided on the stirring shaft (attachment portion) 20.

  That is, the ground improvement construction machine 10 is provided with a construction machine main body 11 in which the leader 12 is provided upright on the front side. The two stirring shafts 20 are supported rotatably and vertically movable on the leader 12 via an elevator 13 and a rotary machine 14 with a swivel mechanism. Each stirring shaft 20 is vertically movably supported along a guide portion 12 a of the leader 12 by a steadying portion 16 provided below the leader 12. Further, at the lower end (tip) of each stirring shaft 20, a rotating shaft 30 provided with a plurality of stirring blades 31, 32, 33 and a digging bit 34 is connected. A blade 35 is attached between the lower portions of the stirring shafts 20 to control the lowering posture of each stirring shaft 20 to be vertical by controlling the inclination angle. In addition, a pair of anti-rotation plates 36 and 36 are attached between the rotation shafts 30 respectively.

  As shown in FIG. 3, an air supply pipe 21 for supplying compressed air A and an improvement material supply pipe 22 for supplying a slurry improving material S such as cement milk are provided inside each stirring shaft 20. ing. And, on the upper end side of the air supply piping 21 of each stirring shaft 20, for example, a light emitter 45 for emitting three types of light H having an illuminance of 0 to 200 lux, 400 to 1000 lux and 1500 to 3000 lux is provided. It is done. Further, on the tip end side (lower end side) of the air supply piping 21, a light receiver 46 that receives the three types of light H from the light emitter 45 is provided. When the light receiver 46 receives the three types of light H from the light emitter 45, for example, the switch (not shown) of the solenoid valve (control device) 37 is controlled to be ON / OFF to fully open, half open the solenoid valve 37 By fully closing, the supply amount of the compressed air A and the slurry improving material S is controlled.

  In the air supply pipe 21 of the stirring shaft 20, a battery (not shown) for supplying electricity to the solenoid valve 37 is provided. Other control devices include an inclinometer and a sensor of a pressure gauge that measures the inclination of penetration of the stirring shaft 20, a cylinder that controls the amount of supply of the compressed air A and the slurry improving material S, and the like. The respective switches such as the switch are also capable of ON / OFF control when the light receiver 46 receives three types of light from the light emitter 45.

  According to the ground improvement construction machine 10 of the above embodiment, when constructing the solidified pile 51 of the slurry improvement material S on the ground 50 by rotational pressing of the stirring shaft 20, the upper end side of the air supply piping 21 of the stirring shaft 20 The switch 45 of the solenoid valve 37 is ON / OFF controlled by the light emitter 45 and the light receiver 46 respectively provided on the front end side (lower end side) to fully open, half open, and fully close the electromagnetic valve 37, compressed air A or By controlling the supply amount of the slurry improving material S, the solidified pile 51 can be constructed with an appropriate amount of the compressed air A or the slurry improving material S.

  Thus, the light emitter 45 is provided on the upper end side of the stirring shaft 20 for ground improvement by rotating the ground improvement construction machine 10, and the light from the light emitter 45 is received on the lower end side of the stirring shaft 20 By providing the light receiver 46 for controlling ON / OFF control of the switch of the solenoid valve 37 as a switch, switches of control devices such as the solenoid valve 37 can be simply and surely by transmitting / receiving light without transmitting / receiving signals by wire. ON / OFF control can be performed. As a result, highly efficient construction becomes possible, and the conventional complicated wiring work for signal transmission and reception becomes unnecessary, and accordingly, cost reduction can be achieved.

  Further, by using the air supply piping 21 of the stirring shaft 20 for stirring and improving the ground as the attachment portion, the space in the air supply piping 21 can be used as the light path of the light emitter 45 and the light receiver 46. The cost can be further reduced because it is not necessary to set up an optical path.

  FIG. 4 is a schematic configuration diagram of a light emitter and a light receiver provided on the stirring shaft according to the second embodiment of the present invention, and FIGS. 5 (a) to 5 (c) are states of operation of the same light emitter and light receiver. FIG.

  In the second embodiment, as shown in FIG. 4, a light emitter 48 for emitting visible light (light) KH is provided on the upper end side of the air supply piping 21 of the stirring shaft 20. A light receiver 49 for receiving visible light KH from the light emitter 48 is provided on the tip end side (lower end side) of the air supply piping 21. The visible light KH from the light emitter 45 is received by the light receiver 46 once as shown in FIG. 5A, for example, to turn on and off the switch (not shown) of the solenoid valve (control device) 37. The solenoid valve 37 is fully opened and half-opened by receiving light twice as shown in FIG. 5 (b) and fully closed by receiving light three times as shown in FIG. 5 (c) to improve compressed air A or slurry The supply amount of the material S is controlled. Thereby, the same operation and effect as the first embodiment can be obtained.

  FIG. 6 is a side view showing a ground improvement construction machine according to a third embodiment of the present invention, and FIG. 7 is a schematic configuration view of a light emitter and a light receiver provided on a casing pipe used for the ground improvement construction machine.

  The ground improvement construction machine 10 'of this third embodiment, as shown in FIGS. 6 and 7, has a long length for supplying compressed air A for drilling into a casing pipe (attachment portion) 40 for sand pile construction. And a short air supply pipe 42 for discharging sand S 'supplied in the casing pipe 40, and can be vertically moved up and down along the guide portion 12a of the leader 12 thereof. The sand S 'is supplied from the hopper 15 to the upper end of the casing pipe 40 supported by the sand, and the sand S' is supplied by the wind force of the compressed air A for sand discharge supplied in the short air supply piping 42 of the casing pipe 40 It is supposed to be discharged.

  A light emitter 45 emits three types of light H having an illuminance of, for example, 0 to 200 lux, 400 to 1000 lux, and 1500 to 3000 lux on the upper end side of at least one air supply piping 41 of the casing pipe 40. 'Is provided. Further, on the tip end side (lower end side) of the air supply piping 41, a light receiver 46 'for receiving the three types of light H from the light emitter 45' is provided. When the light receiver 46 'receives the three types of light H from the light emitter 45', for example, the switch (not shown) of a solenoid valve (control device) provided on the casing pipe 40 is controlled to turn on / off, By fully opening, half opening and fully closing the solenoid valve, it is configured to control the supply amount of compressed air A for drilling and sand discharging.

  Thereby, when the sand pile 52 by sand S 'is constructed on the ground 50 by rotational pressing of the casing pipe 40 of the ground improvement construction machine 10', the upper end side and the tip side of the air supply piping 41 in the casing pipe 40 The switch of the solenoid valve is ON / OFF controlled by the light emitter 45 'and the light receiver 46' respectively provided, and the solenoid valve is fully opened, half opened, fully closed, so that the compressed air A for digging and sand discharging is The sand pile 52 can be constructed by controlling the supply amount, and the same operation and effect as the first embodiment can be obtained.

  In the above embodiments, the light emitter and the light receiver are respectively provided at the upper and lower portions of the air supply pipe to which the compressed air is supplied, and the switch of the control device is controlled to be ON / OFF. However, the switch of the control device may be ON / OFF controlled by the strength of the pressure of the compressed air supplied into the air supply piping.

  Further, according to the above embodiments, the switch of the control device is controlled to be ON / OFF by light transmission / reception, but the intensity of light is detected to perform quantitative control, and further, pulse light Etc. may be combined to diversify control.

10, 10 'Ground improvement construction machine 20 stirring shaft 21 piping for air supply 37 solenoid valve (control equipment)
40 casing pipes 41 and 42 an air supply pipe 45, 45 ', 48 rounds optical device 46, 46', 49 light receiver H light KH visible light (light)

Claims (4)

A control device is provided on a stirring shaft or a casing pipe for sand pile construction which rotates and stirs and improves the ground, and the ground improvement construction for controlling the stirring shaft or a casing pipe for sand pile construction with this control device to improve ground At the machine
A light emitter is provided on the upper side of the air supply pipe provided in the stirring shaft or in the casing pipe for sand pile construction , and light from the light emitter is received on the lower side of the air supply pipe. A ground improvement construction machine provided with a light receiver for controlling the control device. The ground improvement construction machine according to claim 1, wherein
A ground improvement construction machine characterized by controlling the control device by the illuminance of the light. The ground improvement construction machine according to claim 1, wherein
A ground improvement construction machine characterized by controlling the control device according to the number of times of light reception. It is a ground improvement construction machine according to any one of claims 1 to 3,
A ground improvement construction machine characterized by receiving light from the light emitter and performing on / off control of a switch of the control device.

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