JP2005155214A - Soil improving machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a soil improving machine which prevents an improving material from scattering outside a hopper when the improving material is charged in the soil improving material hopper of the soil improving machine. <P>SOLUTION: The soil improving machine is comprised of a plurality of suction nozzles (28a) which are arranged at an inner edge of an opening (22) of the improving material hopper (10), into which a bag body (18) having the improving material sealed therein, is lifted down. The suction nozzles are connected to an air suction source (30). <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a soil improvement machine, and more particularly, to a charging hopper for a soil improvement material provided in the soil improvement machine.

  In landfill work, general civil engineering work, etc., for example, in order to improve and solidify a soft soil, a soft raw soil and a solidifying material such as cement or lime as a soil quality improving material are mixed. This mixing operation is performed mechanically efficiently by a well-known self-propelled soil improvement machine (see, for example, Patent Document 1).

  The soil improvement machine includes a raw material soil hopper for charging the raw material soil, an improvement material hopper for charging the soil quality improvement material, and a mixer for stirring and mixing the charged raw material soil and the soil quality improvement material. .

  In a typical soil improvement work, the input of the raw soil into the raw material hopper is performed using a bucket of a hydraulic excavator, which is a well-known excavating and loading machine, and the input of the soil improvement material into the improved hopper is improved. A flexible bag body such as a flexible container bag filled with materials is suspended in the hopper using a crane equipped with the aircraft, and is dropped on a cutter with a sharp tip provided in the hopper to break the bag body. This is done by opening the package.

Japanese Patent Laid-Open No. 9-195265

  However, the conventional soil conditioner of the form as described above has the following problems to be solved when the soil conditioner is put into the hopper. That is, a powdery soil improvement material such as cement or lime is likely to be scattered around the hopper when the bag is torn open with a cutter and released into the improvement material hopper. Furthermore, it is easily scattered by blowback from the side of the mixer connected to the discharge port of the hopper. Therefore, the working environment is deteriorated by the scattering of the soil improvement material. Also, the cleaning work for removing the improvement material scattered around the hopper is difficult and troublesome. In addition, the appearance of the soil quality improvement machine will also deteriorate.

  In order to prevent scattering of the soil condition improver, a cover such as a rubber sheet is attached to the gap between the opening of the bag body and the hopper. However, it is difficult to prevent scattering of the powdery improving material that easily passes through even a small gap such as cement or lime.

  The present invention has been made in view of the above facts, and its technical problem is to prevent the improvement material from being scattered outside the hopper when the improvement material is introduced into the soil improvement material input hopper of the soil improvement machine. To provide an improved soil quality improvement machine.

  According to the present invention, the soil improvement machine that solves the above technical problem includes a raw material soil hopper, an improvement material hopper, and a mixer that mixes the raw material soil and the soil quality improvement material that are respectively added thereto, and the improvement material A hopper body that opens upward, a cutter that comes into contact with and opens a bag body filled with a soil-improving material lowered through the opening, and a plurality of suction nozzles provided at an inner edge of the opening An air suction source connected to the suction nozzle is provided.

  The soil improvement machine constructed according to the present invention is provided with a suction nozzle connected to an air suction source at the inner edge of the opening of the improvement material hopper from which the bag in which the soil improvement material is enclosed is lowered. Therefore, the improving material that is released from the opened bag body and flows out to the outside through the opening of the hopper is sucked by the suction nozzle provided in the opening and is prevented from being scattered outside the hopper.

  Hereinafter, a soil improvement machine configured according to the present invention will be described in more detail with reference to the accompanying drawings illustrating a preferred embodiment.

  Referring to FIG. 1, the soil improvement machine generally indicated by numeral 2 is an endless track type traveling body 4, a body frame 6 attached on the traveling body 4, and a substantially central portion on the body frame 6. An installed mixer 8, an improved material hopper 10 for introducing a soil quality improving material mounted on the mixer 8, and a raw material soil attached to one end (the left end in FIG. 1) side of the body frame 6 A raw soil hopper 12 for charging is provided. The improved material introduced into the improved material hopper 10 and the raw material soil introduced into the raw material soil hopper 12 are agitated and mixed by the mixer 8.

  On the other end (right end in FIG. 1) side of the machine body frame 6, a discharge conveyor 14 for discharging mixed soil of raw material soil and soil improvement material is provided. The soil improvement machine 2 is also provided with a power chamber 16 in which an engine and the like are housed, and a crane 20 for lifting and lowering a flexible container bag 18 which is a bag body in which the improvement material is enclosed, into the improvement material hopper 10. . In FIG. 1, the crane 20 is shown in two positions, a use state in which the flexible container bag 18 is suspended above the improvement material hopper 10 and a state in which the flexible container bag 18 is stored in the fuselage.

  In the soil quality improvement machine 2, the raw material soil hopper 12, the mixer 8, the discharge conveyor 14, the flexible container bag 18, the crane 20, and the like do not constitute the novel features of the present invention, and may be well known. Therefore, the description is omitted.

  The improved material hopper 10 will be described with reference to FIGS. 2 to 5 together with FIG. The improved material hopper 10 includes a rectangular parallelepiped hopper body 24 having an upward opening 22, and a cutter 26 that is provided in the hopper body 24 and a flexible container bag 18 suspended through the opening 22 is abutted and broken and opened. The hollow tube 28 provided along the inner edge of the opening 22 and formed with a plurality of suction nozzles 28a, the air suction source 30 provided outside the bottom of the hopper body 24, the air suction source 30 and the suction nozzle 28a And an exhaust duct 32 that connects the hollow tube 28 provided with.

  The opening 22 is formed in a rectangular shape. The opening 22 is provided with a cover 23 (FIG. 1) that can be freely opened and closed (not shown in FIGS. 2 to 4).

  A cutter 26 is mounted on a support frame 25 that is provided in the middle of the vertical direction below the opening 22 in the hopper body 24. The cutter 26 is made of thin steel plates and four cutter plates formed in a right triangle, with vertical sides in contact with each other, arranged radially in four directions, and formed with an acute protruding end at the upper end.

  At the bottom of the hopper main body 24, two screws for feeding the introduced improved material toward the discharge portion 34 provided on one side of the outer side of the hopper main body 24 connected to the mixer 8 (FIG. 1). A conveyor 36 is provided. Below the cutter 26 above the screw conveyor 36, a screen 38, which is a net for preventing foreign matter from entering the screw conveyor 36 side from the opening 22 side, is attached.

  On the other side opposite to the one side where the discharge part 34 of the hopper body 24 is provided, there is provided a box 40 that accommodates the driving means of the screw conveyor 36 and is formed with an operator platform 40a on the upper surface. Yes. Under the hopper body 24, four leg frames 42 for installing the improved material hopper 10 on the mixer 8 are provided.

  The hollow tube 24 is disposed in a rectangular shape along the inner edge of the rectangular opening 22. The suction nozzle 28a is formed by a round hole penetrating the inside and outside of the hollow tube 28 as shown in an enlarged view in FIG. The suction nozzle 28 a is opened toward the inner lower side of the hopper body 24.

  The exhaust duct 32 extends vertically along the side surface of the hopper body 24 on which the box body 40 is provided, and is attached by connecting the hollow tube 28 and the air suction source 30.

  The air suction source 30 is provided with an appropriate air suction means (not shown) such as a fan or a roots blower driven by an electric motor. Further, an appropriate dust collecting means (not shown) such as a filter or a cyclone for capturing the sucked soil improvement material is provided.

  On the side surface of the hopper body 24, an electrical switch 44 for turning on and off the operation of the air suction source 30 is provided. The exhaust duct 32 is provided with an openable / closable manual open / close valve 46 for interrupting communication between the suction nozzle 28a and the air suction source 30.

  The operation of the soil improvement machine 2 as described above will be described with reference to FIGS.

(1) Soil improvement material input:
When the flexible container bag 18 filled with soil improvement material is suspended by the crane 20 (FIG. 1) and lowered through the opening 22 into the improved material hopper 10, the bottom portion of the flexible container bag 18 comes into contact with the tip of the cutter 26 and breaks. And opened. Thus, the soil conditioner in the flexible container bag 18 falls below the improver hopper 10 through the screen 38 (indicated by an arrow Y in FIG. 2), is sent to the discharge unit 34 by the screw conveyor 36, and is sent to the mixer 8. It is done.

(2) Prevention of scattering of soil conditioner out of hopper:
The soil improvement material (indicated by an arrow Z in FIG. 2) that is discharged from the flexible container bag 18 into the improvement material hopper 10 and flows out of the opening 22 is sucked by the suction nozzle 28a, passes through the exhaust duct 32, and flows into the air. It flows to the suction source 30. Therefore, the soil quality improving material is prevented from being discharged from the opened flexible container bag 18 and flowing out between the opening 22 of the improving material hopper 10 and the flexible container bag 18 and scattered.

(3) Suction air on / off:
The suction air of the suction nozzle 28a is turned on / off by the operation of the air suction source 30 being turned on / off by the switch 44 or the opening / closing valve 46 of the exhaust duct 32 being opened / closed.

  Although the present invention has been described in detail based on the embodiments, the present invention is not limited to the above-described embodiments, and various modifications or corrections can be made within the scope of the present invention, for example, as described below. Is.

  In the present embodiment, the opening 22 of the improvement material hopper 10 is formed in a rectangular shape, but the shape of the opening is not necessarily a rectangular shape, and an appropriate shape according to the size and shape of the bag body 18, For example, it may be circular.

  In this embodiment, the suction nozzle 28 a is formed by providing a through hole in the suction tube 28, but a plurality of appropriate suction nozzles may be provided at the inner edge of the opening 22.

  In this embodiment, the switch 44 and the on-off valve 46 are provided as means for turning on and off the suction air of the suction nozzle 28a, but only one of them may be provided.

The side view of the soil improvement machine comprised according to this invention. FIG. 2 is an enlarged side view showing a partial cross section of an improvement material hopper provided in the soil improvement machine of FIG. 1. The top view of the improvement material hopper seen in the AA arrow direction of FIG. The front view of the improvement material hopper seen in the BB arrow direction of FIG. The enlarged view of the suction nozzle part shown by C in FIG.

Explanation of symbols

2: Soil improvement machine 8: Mixer 10: Improvement material hopper 12: Raw material hopper 18: Flexible container (bag)
22: Opening 24: Hopper body 26: Cutter 28: Hollow tube 28a: Suction nozzle 30: Air suction source 44: Switch 46: Open / close valve

Claims (4)

A raw material soil hopper, an improved material hopper, and a mixer for mixing the raw material soil and the soil quality improving material charged into each,
The improved material hopper
A hopper body that opens upward;
A cutter provided in the hopper main body, which is in contact with and opened by the bag body enclosing the soil improvement material lowered through the opening;
A plurality of suction nozzles provided at the inner edge of the opening;
A soil improvement machine comprising: an air suction source connected to a suction nozzle.   The soil improvement machine according to claim 1, wherein the suction nozzle is provided in a hollow tube disposed along an inner edge of the opening.   The soil improvement machine of Claim 1 or 2 provided with the switch which turns on and off the action | operation of this air suction source.   The soil improvement machine of Claim 1 or 2 provided with the on-off valve which interrupts | connects the connection of this suction nozzle and an air suction source.

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