JP2009298501A - Raw material soil supply device and self-propelled soil reforming machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a raw material soil supply device capable of stably supplying raw material soil to a device on a downstream side even if the raw material soil is viscous soil, and to provide a self-propelled soil reforming machine provided with the supply device. <P>SOLUTION: The raw material soil supply device 4 is provided with a hopper 13 into which raw material soil is fed, a raw material soil conveying belt conveyor 14 for conveying the raw material soil fed into the hopper 13, and a scraping rotor 15 for scraping the raw material soil conveyed by the raw material soil conveying belt conveyor 14. The raw material soil supply device is provided with an oscillating plate 16 oscillating between a raw material soil receiving position for receiving the raw material soil advancing toward the scraping rotor 15 and a raw material soil push-back position for rotating the raw material soil at a prescribed angle in a pushing back direction from the raw material soil receiving position. The oscillating plate 16 is oscillated and driven by a cam mechanism 49 for converting the rotating motion of the scraping rotor 15 into the oscillating motion of the oscillating plate 16. The self-propelled soil reforming machine 1 provided with the raw material soil supply device 4 can be made to stably produce reformed soil. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a raw soil supply device for supplying raw soil toward a mixer in which mixing with a soil improver, for example, and a self-propelled soil improver including the same.

2. Description of the Related Art Conventionally, a construction generated soil generated by construction work or the like is used as a raw soil, and a predetermined proportion of a soil condition improver is added to and mixed with the raw soil to improve the soil to have a strong supporting force.
In order to efficiently add a certain proportion of soil conditioner to the raw soil, a certain amount of raw soil is supplied to the mixer, and at the same time, a certain proportion of the soil is supplied to the raw soil in the course of the raw soil supply route. A method of continuously adding the improving agent is taken.

  The material soil supply device that continuously supplies a certain amount of material soil to the mixer is equipped with a hopper into which the material soil is charged, and a material soil conveyor belt conveyor that conveys the material soil is installed below this hopper. There is one in which a scraping rotor that scrapes out the raw soil conveyed by the raw soil conveyor belt conveyor is disposed in the hopper (see Patent Document 1).

JP 2004-59187 A

  In this type of conventional raw material soil supply device, the scraping rotor is formed by providing a required protruding member on the outer peripheral surface of the cylindrical member, in order to efficiently scrape the raw material soil in the hopper to the outside of the hopper. Further, the shape and arrangement of the protruding members are devised.

  By the way, for example, when a highly viscous clay is introduced into the hopper as a raw soil, the raw soil moving toward the scraping rotor is retained by the scraping rotor, and the raw soil staying in the scraping rotor is retained. There is a case where it is compressed by the raw material soil that is transported later and is strongly compacted. If it becomes such a state, it will become difficult to scrape out raw material soil with a scraping rotor, and the cutting amount of raw material soil cut out from a hopper through a scraping rotor to a mixer will decrease.

  For this reason, the conventional raw material soil supply apparatus has a problem that when the raw material soil is a viscous soil, the raw material soil cannot be stably supplied to the mixer.

  The present invention has been made to solve such problems, and even if the raw material soil is a viscous soil, the raw material soil supply device capable of stably supplying the raw material soil to a downstream device and the same The purpose is to provide a self-propelled soil improvement machine.

In order to achieve the above object, the raw soil supply apparatus according to the present invention comprises:
In the raw material soil supply device comprising a hopper into which the raw material soil is charged, a transport device that transports the raw material soil charged into the hopper, and a scraping rotor that scrapes the raw material soil transported by the transport device,
The material soil is swung freely between a material soil receiving position for receiving the material soil moving toward the scraping rotor and a material soil pushing back position rotated by a predetermined angle in the direction of pushing back the material soil from the material soil receiving position. A moving plate is provided, and driving means for driving the swing plate to swing is provided (first invention).

  In the present invention, it is preferable that the drive means is a cam mechanism that converts the rotational motion of the scraping rotor into the swing motion of the swing plate (second invention).

  In the present invention, it is preferable that a trapezoidal cutout portion is provided in the lower portion of the swing plate so that the opening width increases as it proceeds downward (third invention).

  In the present invention, it is preferable that an urging means is provided for constantly applying a turning force for rotating the swing plate from the raw material soil pushing position to the raw material soil receiving position (fourth invention). ).

Next, the self-propelled soil improvement machine according to the fifth invention is
It is provided with the raw material soil supply apparatus which concerns on either invention of 1st invention-4th invention.

  According to the raw material soil supply apparatus of the present invention, the material soil immediately before heading to the scraping rotor is loosened by swinging the swinging plate between the raw material soil receiving position and the raw material soil pushing back position. It is possible to prevent stagnation and compaction of the raw material soil before the rotor, and it is possible to stably supply the raw material soil to a downstream device even if the raw material soil is a viscous soil.

  Further, by adopting a cam mechanism that converts the rotational movement of the scraping rotor into the swinging movement of the swinging plate as the driving means for swinging the swinging plate, the swinging plate is utilized by utilizing the drive source of the scraping rotor. Can be swung, so that there is an advantage that it is not necessary to provide a separate drive source to swing the swing plate.

  In addition, a trapezoidal cutout portion is provided in the lower part of the swing plate so that the opening width increases as it goes downward, so that the raw material soil flows from the cutout portion to the scraping rotor. Since it can be loosened, the driving load of the swing plate can be reduced, and the raw soil can be scraped out more efficiently by the scraping rotor.

  Further, by providing an urging means for constantly applying a turning force for rotating the swing plate from the raw soil pushing position to the raw soil receiving position, the swing plate, the scraping rotor, The rocking plate can be surely returned from the raw soil pushing back position to the raw soil receiving position even if the raw soil gets in between a little, and the rocking between the raw soil pushing back position and the raw soil receiving position There is an effect that the rocking motion of the plate is smoothly performed without any delay.

  Moreover, according to the self-propelled soil improvement machine provided with the raw material soil supply device of the present invention, the improved soil can be stably produced even if the raw material soil is a viscous soil.

  Next, specific embodiments of the raw soil supply apparatus and the self-propelled soil improvement machine according to the present invention will be described with reference to the drawings.

  FIG. 1 is a side view showing a principal part of a self-propelled soil improvement machine according to an embodiment of the present invention.

The self-propelled soil improvement machine 1 shown in FIG. 1 uses construction generated soil generated during construction work as raw soil, and adds and mixes a predetermined proportion of soil improver to this raw soil to work the improved soil. Soil improvement machine produced in
This self-propelled soil improvement machine 1 has a lower traveling body 2 equipped with a crawler-type undercarriage device. A vehicle body frame 3 is fixed on the lower traveling body 2. A raw soil material supply device 4 is mounted on the front portion of the vehicle body frame 3. A mixer 5 is installed at the center of the body frame 3, and an engine room 6 is installed at the rear of the body frame 3. Between the raw soil supply device 4 and the mixer 5, a soil conditioner addition device 7 is disposed. A product conveyor belt conveyor 8 is assembled to the vehicle body frame 3 so as to extend rearward from the lower position of the mixer 5.

  The raw material soil supply device 4 supplies the raw material soil to the mixer 5 in a fixed amount. The soil condition improver addition device 7 adds a predetermined proportion of the soil condition improver to the raw material soil that is quantitatively supplied from the raw material soil supply device 4 toward the mixer 5. The mixer 5 mixes the raw soil contained in the mixer 5 with the soil conditioner by the soil cutter 9 and the rotary hammer 10 to produce improved soil. The improved soil produced by the mixer 5 is conveyed toward the rear of the machine body by the product conveyor belt conveyor 8, further refined and mixed by the aftercutter 11 attached to the end of the product conveyor belt conveyor 8, and then outside the machine. It is carried out to.

  Next, the raw soil supply apparatus 4 will be described in more detail.

  The raw material soil supply device 4 includes a hopper 13 into which the raw material soil is charged by a loader 12 such as a hydraulic excavator, and a raw material soil as a conveying device that conveys the raw material material charged into the hopper 13 toward the mixer 5. The conveyor belt 14, the scraping rotor 15 that scrapes the raw soil toward the mixer 5 while keeping the cutting height of the raw soil transported by the raw soil transport belt conveyor 14 constant, and the scraper rotor 15 proceeds. An oscillating plate 16 disposed in the hopper 13 is provided so as to confront the raw material soil.

FIG. 2 shows a view (a) of FIG. 1 (a) and a view (b) in which a portion C of FIG.
FIG. 3 is an enlarged view of part B of FIG. 1 and shows a state in which the swing plate is positioned at the raw soil receiving position.
FIG. 4 is an enlarged view of a portion B in FIG. 1 and shows a state diagram in which the swinging plate is positioned at the raw material pushing back position.

  As shown in FIG. 2B, the scraping rotor 15 includes a cylindrical member 20 and a required protruding member that is fixed to the outer peripheral surfaces of both ends of the cylindrical member 20 at a predetermined interval in the circumferential direction. 21. A shaft member 22 is assembled to an inward flange (not shown) formed on the inner peripheral surface at one end of the cylindrical member 20. A hydraulic motor device 23 having both a function of a bearing and a function of a hydraulic motor is assembled to an inward flange (not shown) formed on the inner peripheral surface of the other end portion of the cylindrical member 20.

  As shown in FIG. 2A, the scraping rotor 15 is supported by a rotor support frame 24 that is detachably attached to the hopper 13. The rotor support frame 24 includes a pair of side plates 25 and 26 arranged so as to sandwich the cylindrical member 20 of the scraping rotor 15, and the upper portions of these side plates 25 and 26 are coupled by a hollow beam member 27. ing. A bearing 28 that rotatably supports the shaft member 22 is assembled to one side plate 25, and a hydraulic motor device 23 is assembled to the other side plate 26, and the scraping rotor 15 is rotated by the operation of the hydraulic motor device 23. It is designed to be driven. The scraping rotor 15 rotates so that the portion in contact with the raw material soil moves in the same direction as the moving direction of the raw material soil.

  As shown in FIG. 3, the swing plate 16 includes a raw material soil receiving plate portion 30 that receives the raw material soil, and a scraper is provided above the raw material soil receiving plate portion 30 so as to be inclined to the rotor 15 side. The mounting plate portion 31 is provided. Necessary ribs 32 and roller mounting seat members 33 are fixed to the plate surface of the rocking plate 16 on the side facing the scraping rotor 15 in the raw soil receiving plate portion 30.

  Further, in the swing plate 16, a side-view boomerang so as to be bridged from the raw soil receiving plate portion 30 to the mounting plate portion 31 on the plate surface facing the raw soil traveling toward the scraping rotor 15. A vertical plate 51 having a shape is fixed. Even if the raw material soil is wound up from the raw material soil receiving plate portion 30 to the mounting plate portion 31, the rolled up raw material soil can be sheared by the vertical plate 51.

  A first bracket 34 extending toward the swing plate 16 is fixed to the beam member 27 of the rotor support frame 24. An intermediate bracket 35 is disposed between the first bracket 34 and the swing plate 16. The intermediate bracket 35 and the first bracket 34 are connected by a pin 36. The intermediate bracket 35 and the swing plate 16 are fastened by a bolt 37 that passes through the mounting plate portion 31 of the swing plate 16 and is screwed into the intermediate bracket 35.

  In this way, the swing plate 16 is attached to the intermediate bracket 35 that is rotatable about the pin 36, so that the swing plate 16 receives the raw material soil that advances toward the scraping rotor 15, as shown in FIG. It is freely swingable between a soil receiving position and a material soil pushing back position as shown in FIG. 4 rotated by a predetermined angle in the direction of pushing back the material soil from the material soil receiving position.

  As shown in FIG. 3, a second bracket 38 that extends upward is fixed to the beam member 27 of the rotor support frame 24. Between the second bracket 38 and the intermediate bracket 35, a return spring device 39 (corresponding to "biasing means" of the present invention) is provided. The return spring device 39 includes a spring holder 41 connected to the second bracket 38 by a pin 40, a spring seat 43 connected to the intermediate bracket 35 by a pin 42, and between the spring holder 41 and the spring seat 43. And a compression coil spring 44 to be incorporated. By this return spring device 39, the oscillating plate 16 is constantly acted on the oscillating plate 16 to rotate the oscillating plate 16 from the material soil pushing back position (see FIG. 4) to the material soil receiving position (see FIG. 3). Can do.

  The spring holder 41 and the spring seat 43 pass through the flange portion of the spring holder 41, screw into the flange portion of the spring seat 43, and a pair of set position adjusting bolts 45 (one side) disposed so as to sandwich the compression coil spring 44. Only connected). By adjusting the tightening amount of the set position adjusting bolt 45, the set position of the spring seat 43 with respect to the spring holder 41 can be adjusted.

  As shown in FIG. 2B, two rows of plate cams 46 are fixed to the outer peripheral surface of the intermediate portion in the axial direction of the cylindrical member 20 of the scraping rotor 15 over the entire periphery. As shown in FIG. 3, each plate cam 46 has a contour in which crests 46 a and troughs 46 b are repeatedly arranged at a predetermined pitch in the circumferential direction of the cylindrical member 20. A roller 47 that rolls in contact with the two rows of plate cams 46 is attached to the roller mounting seat member 33 of the swing plate 16 via a roller support member 48.

As shown in FIG. 3, when the roller 47 is in contact with the bottom surface of the valley 46 b of the plate cam 46, the swing plate 16 is positioned at the raw soil receiving position.
As shown in FIG. 4, when the roller 47 is in contact with the top surface of the peak portion 46 a of the plate cam 46, the rocking plate 16 is positioned at the raw material soil return position.
Therefore, when the plate cam 46 is rotated in accordance with the rotation (rotation direction R) of the scraping rotor 15 by the operation of the hydraulic motor device 23 (see FIG. 2), the rocking is brought into contact with the plate cam 46 via the roller 47. The plate 16 is swung between the raw material soil receiving position shown in FIG. 3 and the raw material soil return position shown in FIG.
A cam mechanism 49 including a plate cam 46 and a roller 47 serves to convert the rotary motion of the scraping rotor 15 into the swing motion of the swing plate 16.

  In the raw soil supply apparatus 4 configured as described above, as shown in FIGS. 5 (a) to 5 (b), the raw soil G traveling toward the scraping rotor 15 is positioned at the raw soil receiving position. After the rocking plate 16 is received by the rocking plate 16, when the rocking plate 16 is rotated from the raw material soil receiving position to the raw material soil pushing-back position with the rotation of the rotor 15, the locus of the lower end of the rocking plate 16 is detected. The raw soil G is sheared along the line, and the sheared portion of the raw soil G is pushed back by the swing plate 16 so that the raw soil G just before the scraping rotor 15 is loosened. By the swing motion of the swing plate 16, the height of the raw soil G immediately before being scraped by the scraping rotor 15 can be smoothly scraped by the scraping rotor 15 as shown in FIG. The specified height is H.

  According to the raw material soil supply device 4 of the present embodiment, the raw material soil before the scraping rotor 15 is loosened by the rocking plate 16, and the stagnation and compaction of the raw material soil before the scraping rotor 15 can be prevented in advance. At the same time, the height of the raw soil before the scraping rotor 15 is set to the specified height H by the swing plate 16, and the scraping of the raw soil by the scraping rotor 15 can be performed smoothly. Even so, the raw soil can be stably supplied toward the mixer 5. Moreover, the self-propelled soil improvement machine 1 provided with the raw material soil supply device 4 of the present embodiment can stably produce the improved soil even if the raw material soil is a viscous soil.

Furthermore, the raw material soil supply device 4 of the present embodiment has the following operational effects.
(1) Since the cam mechanism 49 that converts the rotational movement of the scraping rotor 15 into the swinging movement of the swinging plate 16 is used as the driving means for driving the swinging plate 16 to swing, the drive source of the scraping rotor 15 The rocking plate 16 can be swung using the hydraulic motor device 23, and there is no need to provide a separate drive source for rocking the rocking plate 16.
(2) There is a return spring device 39 that constantly acts on the swinging plate 16 to rotate the swinging plate 16 from the raw soil soil pushing position (see FIG. 4) to the raw soil soil receiving position (see FIG. 3). Since it is provided, even if the raw soil enters between the swing plate 16 and the scraping rotor 15, the swing plate 16 can be reliably returned from the raw soil pushing back position to the raw soil receiving position. The swinging motion of the swinging plate 16 between the soil pushing back position and the raw soil receiving position is smoothly performed without any delay. Further, since the cam mechanism 49 is operated in a state where the roller 47 is always pressed against the plate cam 46, power can be reliably transmitted from the scraping rotor 15 to the swing plate 16.
(3) Since the spring holder 41 and the spring seat 43 are connected by the set position adjusting bolt 45, even if the swing plate 16 is removed from the intermediate bracket 35 by removing the bolt 37, the set position adjusting bolt 45 is tightened. By adjusting the amount of insertion, the intermediate bracket 35 can be held at a predetermined state position. Therefore, when the working condition is not necessary for the swing plate 16, for example, when the raw material soil is low-viscosity soil or the like, the swing plate 16 is removed from the intermediate bracket 35 to easily form an apparatus configuration adapted to the work condition. can do.
(4) Since main components such as the scraping rotor 15 and the swing plate 16 and peripheral devices such as the hydraulic motor device 23 and the return spring device 39 are assembled to the rotor support frame 24 that is detachably attached to the hopper 13. These main parts and peripheral devices can be attached and detached as a single unit, and maintenance and repair are easy to perform.

  As mentioned above, although the raw material soil supply apparatus and the self-propelled soil improvement machine of the present invention have been described based on one embodiment, the present invention is not limited to the configuration described in the above embodiment, and departs from the gist thereof. The configuration can be appropriately changed within a range not to be performed.

For example, the swing plate 16 may be driven to swing by a drive source other than the hydraulic motor device 23 that is the drive source of the scraping rotor 15.
That is, as shown in FIG. 6, the cam mechanism 49 provided in this embodiment is abolished, and the hydraulic cylinder 50 is incorporated between the intermediate bracket 35 and the second bracket 38 instead of the return spring device 39. The swing plate 16 can be driven to swing by the expansion / contraction operation of the hydraulic cylinder 50.

  Further, instead of the swing plate 16 of the present embodiment, a swing plate 16A as shown in FIG. 7 may be used. The swing plate 16A has a trapezoidal notch 52 at its lower portion so that the opening width increases as it proceeds downward. The rest of the configuration is the same as that of the swing plate 16 of the present embodiment, and the same reference numerals are given to the drawings, and detailed description thereof is omitted.

In the swing plate 16A shown in FIG. 7, the notch 52 is horizontally arranged in a direction orthogonal to the direction in which the material soil is conveyed by the material soil conveyance belt conveyor 14 (the direction perpendicularly penetrating the paper surface from the reader side in FIG. 7). A notch part upper edge 52a extending, a notch part left side edge 52b continuous to the left in the figure of the notch part upper edge 52a, and a notch part right edge 52c continuous to the right side in the figure of the notch part upper edge 52a It is made up of.
Here, in order to ensure that the raw soil after passing through the notch 52 is scraped out by the scraping rotor 15, the height position of the notch upper edge 52 a is the height position of the rotation center of the scraping rotor 15. It is as follows. The corner 52d of the intersection between the upper edge 52a of the notch and the left edge 52b of the notch forms an obtuse angle, and the corner 52e of the intersection of the upper edge 52a of the notch and the right edge 52c of the notch is the same. Is obtuse.

When the swinging plate 16A is driven to swing, a part of the raw soil received by the raw soil receiving plate 30 is sheared by the corners 52d and 52e so as to be caught in the notch 52. Due to the shearing action, the raw soil passes through the notch 52 and the flow toward the rotor 15 is formed.
According to the raw material supply device 4 provided with the swing plate 16A, the raw material soil can be loosened so as to flow from the notch 52 to the scraping rotor 15, so that the load on the hydraulic motor device 23 can be reduced. And the raw soil can be scraped out more efficiently by the rotor 15.
Note that the shape of the notch 52 may be a semi-elliptical shape or a semi-circular shape in addition to the trapezoidal shape.

The side view which fractures | ruptures and represents the principal part of the self-propelled soil improvement machine which concerns on one Embodiment of this invention. FIG. 1B is a view in which the rocking plate is partially broken and is shown in a part C of FIG. 1A (a) and (a). FIG. 2 is an enlarged view of part B in FIG. 1, in which the swing plate is positioned at the raw soil receiving position. FIG. 2 is an enlarged view of a portion B in FIG. 1, in which the swing plate is located at the raw material pushing back position. Explanatory drawing of loosening operation of raw soil by swinging plate The figure explaining the other example of a drive means of a rocking | fluctuation plate The figure explaining the other example of an oscillation board

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Self-propelled soil improvement machine 4 Raw material soil supply apparatus 13 Hopper 14 Raw material soil conveyance belt conveyor 15 Scraping rotor 16, 16A Oscillation plate 39 Return spring device 41 Spring holder 43 Spring seat 44 Compression coil spring 45 Set position adjustment bolt 46 Plate Cam 47 Roller 49 Cam mechanism 50 Hydraulic cylinder 52 Notch

Claims (5)

In the raw material soil supply device comprising a hopper into which the raw material soil is charged, a transport device that transports the raw material soil charged into the hopper, and a scraping rotor that scrapes the raw material soil transported by the transport device,
The material soil is swung freely between a material soil receiving position for receiving the material soil moving toward the scraping rotor and a material soil pushing back position rotated by a predetermined angle in the direction of pushing back the material soil from the material soil receiving position. A raw soil supply apparatus, characterized in that a moving plate is provided and a driving means for swinging the swing plate is provided.   The raw soil supply apparatus according to claim 1, wherein the driving means is a cam mechanism that converts a rotational motion of the scraping rotor into a swing motion of the swing plate.   The raw soil supply apparatus according to claim 1, wherein a trapezoidal cutout portion is provided at a lower portion of the swing plate so that an opening width increases as it proceeds downward.   4. The urging means is provided for urging the oscillating plate to always act on the oscillating plate for turning the oscillating plate from the raw soil soil pushing position to the raw soil soil receiving position. Raw material supply device.   A self-propelled soil improvement machine comprising the raw soil supply device according to any one of claims 1 to 4.

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