JP2000230247A - Self-propelled soil improving machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase the capacity of a soil improving material hopper fitted to a traveling vehicle and to decrease the height size of the soil improving material hopper at the time of transportation. SOLUTION: A soil improving material hopper 30 arranged on a carrying-in conveyor is supported on a frame-like base plate provided on supports 31, and a storage tank 33 is constituted of a base section 35 fitted with a feeder 34 at the lower end section, a top plate section 36 and a bellows section 37 provided between them. To fix the bellows section 37 at two positions for the extended operation state and the shrunk storage state, support levers 45 provided on the top plate section 36 are inserted into guide tubes 46, the support levers 45 are provided with two pin insertion holes 45a, 45b at two positions, a pin insertion hole is bored at one prescribed position on each guide tube 46, and the support levers 45 can be fixed by stopper pins 47 adjustably in height.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a machine used for improving soft ground and strengthening the ground, and for improving the quality of earth and sand to meet a predetermined purpose. The present invention relates to a self-propelled soil improvement machine that performs soil improvement while traveling appropriately.

[0002]

2. Description of the Related Art For example, in burying gas pipes, water and sewage works, other road works, foundation works, etc., it is desirable to backfill excavated soil, but since generated soil is not suitable for backfilling. Then, the excavated soil is carried out and new high quality soil is carried in to fill the excavated area. For example, if the soil itself is soft, such as clayey soil with extremely small particle size and high viscosity, or soil that is too hard to solidify due to excessive weathering, land subsidence occurs Etc. may occur. However, since the poor soil generated by excavation at a construction site is a kind of industrial waste, its disposal place is restricted. Therefore,
There is a strong need to convert poor soils into reusable resources. In this way, in order to make it possible to reuse soft soil and the like that may cause land subsidence when the soil generated by excavation is backfilled, for example, soil that mainly contains lime or cement The improver is mixed with earth and sand and solidified. As a result, it is possible to convert the soil into high-quality soil that is suitably used for backfilling an excavated site.

[0003] The soil improvement treatment for solidifying the soil is performed by mixing the soil and the soil improvement material. A typical mixing method of the soil and the soil improvement material is a mixing method using a stirring means. And a crushing method provided with a rotary striker are conventionally known. The mixing method is
A stirring means is provided in the tank, and the earth and sand and the soil improving material are charged into the tank and uniformly stirred and mixed by the stirring means. The stirrer performs a batch type process that only performs the function of stirring and mixing the inside of the tank, and a screw-type stirrer is provided to stir and mix the soil and soil improvement material in a predetermined direction. In some cases, a continuous process is performed in which the soil and soil improvement material are continuously supplied and the generated improved soil is continuously discharged. A crushing type soil improvement machine as another method of soil improvement processing is disclosed in, for example, JP-A-9-195265. This crushing type soil improvement machine is provided with a crushing machine consisting of a rotary hitter, and the earth and sand and the soil improvement material are dropped from the upper position toward the rotary hitter, and the rotary hitter is rotated in the meantime. By doing so, the soil and the soil improvement material are hit and broken.

Here, a soil improvement machine using a crushing method is
It is designed so that it can be transported directly to construction sites and self-propelled for soil improvement. To this end, the earth and sand hopper, soil improvement material hopper and crusher are installed on traveling means provided with crawler tracks, and the whole machine is made compact. Therefore, when transported to a construction site or the like, the vehicle is loaded on a trailer, and at the construction site or the like, the vehicle is self-propelled to a location near an excavation site or a backfill site to perform a predetermined soil improvement process. This self-propelled crushing soil improvement machine does not perform agitation and mixing, but rather crushes by impact.The quality of the reinforced soil produced in terms of crushing, that is, the degree of mixing of soil and soil improvement material is somewhat Although it is inferior, it is advantageous in terms of the production cost of improved soil and in terms of traffic obstacles.

On the other hand, a mixing type soil improvement machine is
A large mixing plant and an extremely large volume soil improvement material hopper are used.The earth and sand hopper is generally constructed as a large plant suitable for processing large amounts of earth and sand by transporting the earth and sand on a belt conveyor. It is. Therefore, in such a large-scale plant, it is possible to efficiently produce high-quality improved soil in which the soil and soil improvement material are extremely uniformly mixed, but the soil is collected from a wide area, and the produced improved soil covers a wide range. Because of the supply, the transportation cost becomes extremely high, and the dump truck frequently passes. In addition, in order to increase the accumulation space for sediment and improved soil, such large-scale plants should be installed in urban areas or suburbs where excavated soil is generated and the improved soil is consumed for backfilling. Installation is difficult, which further increases the cost for transportation.

Therefore, when performing soil improvement in a plant facility, it is desirable to perform the treatment at a location as close as possible to an urban area where the soil is to be improved and where the soil improvement material is consumed. Becomes In a soil improvement treatment facility, a large amount of sediment is not carried in at once, but it generally takes a certain period of time until the treatment facility is filled with the soil to be subjected to the soil improvement treatment.
Therefore, if a large number of yards for accumulating earth and sand are set, and the soil improvement machine is used repeatedly among these multiple yards,
The operation efficiency of the soil improvement machine is improved. In addition, since the soil improvement treatment processes the accumulated soil to produce the improved soil, it can be used as both a sediment accumulation site where the soil improvement process is to be performed and an improved soil deposition site. As a result, the space of the processing facility itself can be effectively used, and the space efficiency is improved.

[0007] However, in order to perform soil improvement processing in a small yard as described above, it is necessary to transport a soil improvement machine between yards as appropriate. Also, in order to use the space in each yard efficiently, do not use a belt conveyor, etc.
All treatments must be able to be performed only with the soil improvement machine. Therefore, it is necessary to make the soil improvement machine small and compact and to have mobility, to make the soil improvement machine self-propelled and to be portable using a trailer.

[0008]

By the way, when transporting the soil improvement machine, a trailer is used. However, since the trailer travels on a general road, the vehicle height during transportation is limited. Regardless of whether the mixing method or the crushing method is used, in the overall configuration of the soil improvement machine, the earth and sand hopper and the soil improvement material hopper, which are mechanisms for supplying the earth and sand and the soil improvement material, have It is arranged at a higher position than the mechanism for stirring and mixing the soil improving material.

Excavated soil or other earth and sand is sequentially supplied to the earth and sand hopper by a belt conveyor, a hydraulic shovel, or the like, so that the earth and sand supplied intermittently in the earth and sand hopper is continuously transported by a conveyor. It is sufficient to have a buffer function, and although it is necessary to store a certain amount of earth and sand, a large volume is not required, and the size and size can be reduced. On the other hand, the soil improvement material is stored in advance in the soil improvement material hopper, and is consumed by sequentially adding the soil improvement material to the earth and sand. Therefore, when the soil improving material hopper becomes empty, the soil improving material is newly supplied. Generally, the soil improvement material is filled in a flexible container, and replenishment to the soil improvement material hopper is performed from this flexible container. If the volume of the soil improvement material hopper is small, replenishment must be performed frequently, and during this replenishment operation, the soil improvement process must be stopped, thereby significantly reducing the work efficiency. Therefore, from the viewpoint of work efficiency, it is necessary to increase the volume of the soil improving material hopper as much as possible, and therefore, the height position of the soil improving material hopper becomes extremely high.

[0010] As described above, when transporting a soil improvement machine provided with a soil improvement material hopper capable of storing a large amount of soil improvement material by a trailer, the soil improvement material hopper must be removed. Further, when the soil improvement material is transported to the site where the soil improvement is performed, it is necessary to incorporate the soil improvement material hopper again. In particular, the soil improvement material hopper is not limited to a mere container, and it is necessary to provide appropriate driving means such as a fixed amount supply means for supplying the soil improvement material by a fixed amount and a stirring means in the hopper. In addition, there is a possibility that these driving means may be damaged during the mounting operation. Further, when at least a part of these driving means is of a hydraulic drive type, operations such as attaching and detaching a hydraulic pipe are also required. Therefore, there is a problem that the work of attaching and detaching the soil improving material hopper from the soil improving machine is very troublesome and requires a long time.

The present invention has been made in view of the above points, and an object of the present invention is to mount a soil improving material hopper having a large volume and to transport without removing the soil improving material hopper. Is to do so.

[0012]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, the present invention provides a main body frame connected to a traveling means, which is provided with earth and sand supplied from a soil hopper and a soil improvement material supplied from a hopper. Conveyor for transporting
A processing mechanism provided with a stirring means for transferring the earth and sand and the soil improvement material in a substantially horizontal direction while mixing and stirring in the processing tank, and an unloading conveyor for conveying the improved soil generated by the processing mechanism in a predetermined direction. A self-propelled soil improvement machine is characterized in that the soil improvement material hopper is provided with a height adjusting unit for changing a volume in at least a part of the hopper in a vertical direction.

[0013] Here, the storage tank includes a hard top plate,
The base portion formed of a hard container having an opening at the upper portion and having a predetermined height, and the height adjustment portion interposed between the base portion and the top plate portion can have a bellows structure. The bellows structure is configured by fixing a plurality of supporting bones at predetermined pitch intervals in the vertical direction so as to surround at least one of the inner and outer peripheries of the flexible tubular sheet. desirable. Here, a plurality of support rods are suspended from the top plate part, and the base part is mounted on the main body frame or a mounting part composed of a pedestal fixedly provided on the main body frame, and each support rod is mounted on the mounting part. Stopper means is provided to be inserted into the provided guide cylinder so as to be able to ascend and descend, and selectively holds the support rod in the guide cylinder at a position where the height adjustment portion is extended upward and at a position where it is reduced downward. A configuration may be provided.

The soil improving material is supplied from a flexible container, and it is preferable that the flexible container be cut off in the storage tank. For this purpose, a cutter for cutting the flexible container of the soil improvement material is disposed at a predetermined depth position in the storage tank, and the cutter is supported on the lower surface of the top plate portion, and the cutter mounting position on the top plate portion is set. And a lid that can be opened and closed can be provided on the upper part of the device. It is further desirable to provide a stirring device in a rotary hopper at a lower portion of the storage tank for feeding the soil improvement material therein to the feeder.

The storage tank also has an upper tank portion having an upper end closed and an open lower end, a lower tank portion having a lower end closed and an open upper end and an upper tank portion fitted in a telescopic shape, An elastic sheet is provided so as to extend between the opening sides of the two tank portions, and a portion provided with the elastic sheet may be used as a height adjusting portion. Further, the soil improvement processing means includes a mixing mechanism that stirs and mixes the soil and soil improvement material, and a crushing mechanism that strikes the soil and soil improvement material.

[0016]

Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 show the overall configuration of the self-propelled soil improvement machine. First, in FIG. 1, reference numeral 1 denotes a lower traveling body, and the lower traveling body 1 is provided with crawler-type means having a crawler belt 1a. Although the illustrated lower traveling body 1 is a crawler-type traveling means, taking into consideration the case where earth and sand are intermittently introduced, it is necessary to prevent the entire vehicle body from becoming unstable due to an impact load at the time of earth and sand introduction. This is to prevent it. Therefore, in the case where the earth and sand are continuously charged by a conveyor or the like, it may be configured by a wheel-type traveling body.

The lower traveling body 1 is provided with a body frame 2 constituting a chassis connected thereto.
Are provided with various mechanisms and devices. In the main body frame 2, when the left side in FIG. 2 is set to the front of the machine, a material supply unit 3 is disposed at a front position. A processing mechanism unit 4 is mounted on the rear side, and an improved soil discharging unit 5 is further provided rearward from the processing mechanism unit 4. The improved soil discharge section 5 extends obliquely upward from a position below the processing mechanism section 4, and a machine room in which machines such as an engine, a hydraulic pump, and a direction switching valve unit are built in an upper position of the processing mechanism section 4. 6 are provided.

The material supply unit 3 is for supplying a material comprising soil and soil improving material for soil improvement, and controls a mixing ratio between the supplied soil and soil improving material. It has become. For this purpose, a carry-in conveyor 10 is provided, and a sediment hopper 20 is provided at the most upstream side, that is, in front of the machine in the carrying direction of the carry-in conveyor 10.
However, a soil improvement material hopper 30 is installed on the rear side. Also, by measuring the amount of earth and sand transported by the loading conveyor 10,
The supply amount of the soil improving material from the soil improving material hopper 30 is adjusted according to the measured amount.

As is apparent from FIG. 3, the carry-in conveyor 10 is provided so as to be inclined from the end of the main body frame 2 at a predetermined angle. The carry-in conveyor 10 has a conveyor belt 11, and the conveyor belt 11
The driven wheel 13 is provided between the driven wheel 13 and the driven wheel 1, and a well-known tension adjusting mechanism is provided on the driven wheel 14 side. In order to support the transport surface of the transport belt 11, guide rollers 15 are provided below the transport surface at predetermined pitch intervals. Further, on both left and right sides of the transport surface of the transport belt 11, the regulating plate 1 is located at a position upstream of the mounting portion of the earth and sand hopper 20.
6 and 16 are provided, and the regulating plate 16 determines the transport height of the transport belt 11, thereby controlling the transport amount of the earth and sand. The transport conveyor 10 is provided in such a state that the downstream side thereof is low, and the conveyor 10 rises obliquely upward toward the upstream side.

The earth and sand hopper 20 is configured as shown in FIGS. The earth and sand hopper 20 is formed of a substantially frame-shaped member, and has upper and lower openings. The earth and sand hopper 20 has an upper end fixed to a support member 18 provided on a support post 17 erected on the main body frame 2, and the lower end thereof corresponds to the inclination angle of the carry-in conveyor 10. Angle is inclined. Of the four peripheral walls constituting the earth and sand hopper 20, the wall surface 20a located on the downstream side of the carry-in conveyor 10 faces the surface of the conveyor belt 11 with a very small gap. The wall surfaces 20b and 20c are in contact with the regulating plate 16 of the carry-in conveyor 10. As a result, the end position of the carry-in conveyor 10 except for the upstream side thereof,
Oa, 20b, and 20c provide a substantially closed state.

The carry-in conveyor 10 in the earth and sand hopper 20
The lower end of the wall surface 20d located on the upstream side in the feed direction is arranged at substantially the same height as the height of the regulating plate 16,
As a result, the earth and sand supply port 21 is formed in the earth and sand hopper 20. Further, a pressure roller 22 provided with a large number of pressing claws 22a on the outer peripheral surface is provided on the outer surface side (or the inner surface side) of the wall surface 20d of the earth and sand hopper 20, and the pressure roller 22 has an action of its own weight or A predetermined pressure can be applied to the earth and sand that has passed through the supply port 21 by urging means such as a spring. Therefore, the earth and sand hopper 20 supplies a certain amount of earth and sand determined by the conveyance speed of the conveyor belt 11 in the carry-in conveyor 10, the opening area of the supply port 21, and the pressing force of the pressure roller 22.

The earth and sand is not directly supplied to the earth and sand hopper 20. The sieve unit 23 removes solid foreign matters such as rocks, concrete, metal lumps, and the like, and reduces the bulk density of the earth and sand so that the inside of the earth and sand is reduced. The air is allowed to fall on the conveyor belt 11 after sufficient air is contained. As described above, by reducing the bulk density of the earth and sand, the earth and sand can be smoothly transported by the loading conveyor 10 with a light load. Therefore, as shown in FIGS. 6 and 7, the sieving unit 23 has a frame 24, and the grid members 25 are arranged vertically and horizontally at a predetermined pitch interval on the frame 24. Therefore, a mesh is formed by the vertical and horizontal pitch intervals of the grid member 25, and those having a particle size of this mesh size are selectively guided into the sediment hopper 20, and objects larger than that are placed on the grid member 25. It will remain.

Here, the sieve unit 23 may be configured as a fixed sieve, but is desirably a vibrating sieve. Note that there are various modes for configuring the vibrating sieve, but in the illustrated one, the sieve unit 23 is vibrated in the vertical direction. For this,
The sieving unit 23 is supported on the support member 18 so as to be able to vibrate vertically. A spring receiving member 26 is fixedly provided at the four corners of the frame 24, and a spring 27 is interposed between the support member 18 and the spring receiving member 26, so that the frame 24 is supported. It is elastically supported by the member 18. A vibration member 28 is connected to the lattice member 25, and the vibration member 28 vertically moves the lattice member 25 mounted on the support frame 24. The vibration means 28 is a motor (electric motor or hydraulic motor)
A vibration member 28b is driven by the rotation of the vibration member 28a, and the vibration member 28b is formed of a rotating drum.
The end of a vibrating shaft (not shown) provided at 5 is inserted, and by rotating this vibrating member 28b, the vibrating shaft and the lattice member 25 connected thereto vibrate.

Next, as shown in FIGS. 8 to 13, four soil improving material hoppers 30 arranged on the upstream side of the earth and sand transporting direction by the carry-in conveyor 10 stand on the main body frame 2 (see FIG. 8 to FIG. 13). (Or three) columns 31 are supported by a frame-shaped base plate 32 provided on the columns 31. Therefore, the loading conveyor 10
Is extended to a position between the pillars 31, 31, and a predetermined amount of soil improvement material is added to the earth and sand supplied from the earth and sand hopper 20 on the carry-in conveyor 10. Here, the soil improvement material is mixed with earth and sand in order to improve or modify the soil quality, and a material suitable for the purpose of each soil improvement and reforming is used. For example, when used as ground improvement or backfill soil, lime or cement, or a mixture of these with various additives for promoting solidification is used. Further, when the ground is to be reformed or the acid soil is to be reformed, an appropriate soil improvement material is supplied.

The soil improving material hopper 30 includes a storage tank 33 for storing a predetermined amount of the soil improving material,
And a feeder 34 for supplying a soil improving material by a predetermined amount. Here, the storage tank 33
Is substantially cylindrical, has a space for storing soil improvement material therein, and has a configuration in which the height dimension is variable. Therefore, the storage tank 33 has a base portion 35 whose lower side is installed on the base plate 32 and whose upper end is open,
It is composed of a top plate portion 36 and a bellows portion 37 provided between the base portion 35 and the top plate portion 36. The base portion 35 and the top plate portion 36 are formed of a hard member such as a steel plate.
7 is capable of extending and contracting in the vertical direction, and when the bellows portion 37 is extended, the operation state shown in FIG.
A large amount of soil improvement material can be stored inside. FIG. 10 shows the stored state of the bellows 37. When the storage state is set as described above, the height of the soil improvement machine is reduced as described later. Therefore, the bellows 3
Reference numeral 7 functions as height adjusting means of the soil improving material hopper 20.

The base 35 in the storage tank 33 is
As shown in FIG. 11, a bottom plate 35a and a peripheral body 35b are provided.
8 are provided. The stirring member 38 in the hopper is provided with a stirring blade 38a disposed near the bottom plate 35a inside the base portion 35 and connected to the stirring blade 38a.
And a motor 38c that rotates the rotating shaft 38b. The agitating member 38 in the hopper is used to supply the soil improvement material from the storage tank 33 to the feeder 34 so that the base portion 35
This is for supplying the soil improving material to the feeder 34 smoothly from the communication hole 39 provided in the bottom plate 35a. In addition, an inspection door 40 that can be opened and closed is provided on the peripheral body 35 b of the base 35. In the drawing, reference numeral 39a denotes an outlet for taking out the soil improving material, and discharges the soil improving material if the soil improving material still remains in the storage tank 33 after the soil improving process is completed. For
The outlet 39a can be opened and closed. And in order to take out the soil improvement material in the storage tank 33 more smoothly, it is desirable that the take-out port 39a be provided in a plurality of places on the bottom plate 35a.

The top plate 36 is formed of a plate whose outer peripheral side is bent downward, and has a substantially circular opening 36 at the center thereof.
a is formed, and an openable / closable lid 41 is formed above the opening 36a. In addition, at a position outside the opening / closing lid 41, at least three hook locking members 42 are provided.
It is provided in places. As shown in FIGS. 12 and 13, a cutter 43 is provided below the portion of the top plate 36 where the opening / closing lid 41 is provided so as to be supported by the cutter support 43a. Here, the soil improvement material is filled in the flexible container, and the soil improvement material is directly supplied from the flexible container to the storage tank 33. The cutter 43 is provided to cut off the lower end of the flexible container. ing. In order to ensure that the soil improvement material flows into the storage tank 33 from the flexible container cut by the cutter 43 and does not overflow or scatter around, the support arm 43a to which the cutter 43 is attached is provided. It is provided at a position where it enters only a predetermined depth from the top plate portion 36.

Further, the bellows portion 37 is composed of a ring-shaped support bone 37b fixed to the outer periphery of a flexible sheet 37a having high strength at a predetermined pitch in the vertical direction, and the support bone 37b has soil inside. When the improving material is filled, the bellows portion 37 serves as a shape retaining member for preventing the entire bellows portion 37 from bulging outward. The lower end of the flexible sheet 37 a is fixed to the upper end of the base 35, and the upper end is fixed to the inner surface of the top plate 36.

Here, as a specific configuration of the bellows portion 37, for example, as shown in FIG.
a is bent in a zigzag manner in the vertical direction,
7b can be configured to be fixedly provided to the direction change portion by each bending. Further, as shown in FIG. 15, the support bones 237b are attached to the flexible sheet 237a at a predetermined pitch, and the fastening of the support bones 237b is performed by folding back the loop portion 237c on the flexible sheet 237a.
Is provided, and the support bone 23 is provided in the folded loop portion 237c.
7b may be fixedly provided. Further, FIG.
As shown in FIG. 6, the support sheet 337 is attached to the flexible sheet 337a.
When fixing b, a support bone fixing portion 337c made of a sheet or a metal fitting may be attached to the outer surface of the flexible sheet 337a.

As long as the bellows section is composed of a flexible sheet and a support bone, various kinds of constructions other than the above three constructions can be used. The structure of the bellows portion 137 having the configuration shown in FIG.
There is a possibility that the soil improving material may accumulate in the outwardly protruding portion in the zigzag shape a. In order to reliably prevent the soil improving material from accumulating in the bellows portion, the bellows portion 3 having the structure shown in FIG.
37, and the flexible sheet 337a may be given a tension in the operating state. However, the structure of the bellows portion 337 of FIG. 16 is more complicated than that of the bellows portions 137 and 237 of the configuration of FIGS. Here, since the bellows portion has flexibility as a whole, even if it accumulates in a zigzag portion or a bent portion, if an impact is applied thereto, the soil improvement material accumulated in the middle can easily be dropped. Can be. Therefore, the bellows of any structure can be adopted.

The soil improving material hopper 30 is provided with the bellows 37 which can be extended and contracted in the middle, so that the bellows 37 is extended and the storage state shown in FIG. Need to be fixed selectively. To this end, mounting plates 36b are provided on the top plate portion 36 so as to extend laterally at three locations at approximately 120 ° intervals, and a support rod 45 is vertically provided on each of the mounting plates 36b. ing.
Further, guide cylinders 46 are erected on the base plate 32 at positions corresponding to the vertical positions of the respective support rods 45, and the support rods 45 are slidably inserted into the guide cylinders 46, respectively. I have. Thereby, the guide cylinder 46 and the support rod 45
Are fitted in a telescope shape, and the support rod 45 can penetrate the guide cylinder 46 and protrude downward.

This is for fixing the bellows 37 at one of two positions, an operating state in which the bellows portion 37 is extended and a retracted state in which the bellows portion 37 is extended. 45a and 45b are provided.
6 has only one pin insertion hole at a predetermined position (not shown)
Are drilled. When the stopper pin 47 is inserted with the pin insertion hole 45a below the support rod 45 aligned with the pin insertion hole of the guide cylinder 46, the bellows 37 is maintained in the extended operating state. On the other hand, when the stopper pin 47 is inserted by aligning the pin insertion hole 45b above the support rod 45 with the pin insertion hole of the guide cylinder 46, the bellows 37 is held in the retracted state. Here, the bellows 37
In the retracted state, the cutter 43 provided on the top plate portion 36 and the support arm 43a supporting the cutter 43 are positioned so as not to interfere with the stirring blade 38a of the hopper stirring member 38 provided on the base portion 35 side. Is preferably the closest position within a range that does not interfere with each other.

The feeder 34 connected to the storage tank 33 is for supplying the soil improving material at a regulated supply amount. That is, as shown in FIGS. 17 to 19, the feeder 34 has a casing 48 fixed to the lower surface of the communication hole 39 in the storage tank 33, and this casing 48 has an inflow port 49 a communicating with the communication hole 39 and a lower portion. It has an open supply port 49b, and an intermediate wall surface is an arc-shaped quantitative supply section 49c. Inside the quantitative supply section 49c, the rotor 50 is fitted to the rotating shaft 51. The rotor 50 is rotatably driven by a rotating shaft 51. The fixed quantity supply unit 49c is provided on the rotor 50.
A plurality of partition walls 50a substantially slidably contacting the inner wall surface of the rotor 50 are radially provided, and every time the rotor 50 rotates by a predetermined angle, the soil improving material corresponding to the space between the adjacent partition walls 50a, 50a is separated. Will be done. Therefore, every time the rotor 50 rotates by a predetermined angle, the soil improving material for the volume of the space described above is supplied in a fixed amount. Therefore, by controlling the rotation speed of the rotor 50, the supply amount of the soil improvement material can be controlled, that is, the higher the rotation speed of the rotor 50, the larger the supply amount of the soil improvement material. For this purpose, a rotating shaft 51 is led out of the casing 48, and a pulley 51 a is connected to an end of the rotating shaft 51, and the pulley 51 a is connected to an output shaft 52 of a motor 52.
a, a power transmission member 53 composed of a transmission belt or the like.
Is interposed. Here, in order to strictly control the supply amount of the soil improvement material due to the rotation of the rotor 50, it is desirable to use a variable speed electric motor as the motor 52. If so, a hydraulic motor may be used.

In the soil improving material hopper 30 configured as described above, the storage tank 33 is filled with the soil improving material, and this filling operation is performed from a flexible container. Since the soil improving material hopper 30 is located at a high place, the opening / closing lid 41 provided on the top plate portion 36 is opened, and the flexible container is suspended, and inserted into the storage tank 33 from the opening / closing lid 41. And cutter 4
At 3, the lower end must be cut off.
For this purpose, the body frame 2 is provided with a crane 54 at a position on one side thereof. As shown in FIG. 20, the crane 54 has a turning portion 54a on the main body frame 2.
And a support member 54b is erected on the revolving portion 54a,
The base end of an arm 54c that expands and contracts in a telescopic manner is pivotally supported by the support member 54b so that the cylinder 54d can perform a raising operation. A wire 56 connected to the hook 55 is connected to the tip of the arm 54c, and the hook 55 can be raised and lowered by winding up or pulling down the wire 56.

As described above, the earth and sand and the soil improving material are conveyed by the conveyor belt 11 constituting the carrying-in conveyor 10, and the end of the carrying conveyor 10 is formed between the sand and the soil improving material in the processing mechanism unit 4. It is connected to the processing tank 60 as a mechanism for stirring and mixing. The processing tank 60 is formed of a rectangular container arranged in the longitudinal direction of the main body frame 2, that is, in a substantially horizontal direction. At positions before and after the processing container 60, mounting portions 61 projecting to the left and right are continuously provided. Reference numeral 61 is fixedly installed on the upper surface of the main body frame 2 by bolts or the like. 21 to 24 show the internal configuration of the processing tank 60 that forms the processing mechanism unit 4. FIG.

First, as is clear from FIGS. 21 and 22, an inlet 62 forming an inlet portion is provided at an upper portion on the front side of the processing tank 60, and an outlet port serving as an outlet portion is provided at a lower portion on the rear side. 63 are provided in connection with each other, and the other parts are sealed. As shown in FIGS. 23 and 24, two paddle mixers 64 are provided in the processing tank 60 in parallel. The paddle mixer 64 has a rotating shaft 65, on which a paddle 66, which is an intermittently provided blade as a stirring / transferring member, has a predetermined angle (for example, 9 mm).
(Every 0 °), and the paddle 66 is rotationally driven by rotating the rotating shaft 65 to stir the inside of the processing tank 60 and to be guided into the processing tank 60. The earth and sand and the soil improvement material are transferred toward the discharge port 63 side while being stirred and uniformly mixed. Then, this transfer amount changes according to the angle of the paddle 66.

As described above, in the present embodiment, two paddle mixers 64 are provided, and the paddle 66
Are arranged at positions where the phase is 90 °. However, the number of the paddle mixers 64 and the arrangement intervals of the paddles 66 are determined by the relationship between the height and width of the processing tank 60. For example, if the height of the processing tank 60 is increased, a large paddle having a large turning radius can be attached.
Although the number of paddle mixers 64 may be small, the processing tank 60
When the height dimension of the paddle is reduced and the width is increased, the radius of rotation of the paddle becomes small, so that the number of paddle mixers is increased. Therefore, in order to have a predetermined stirring efficiency,
The size of the processing tank 60 and the number of paddle mixers 64 may be set based on the relationship between the width of the main body frame 2 and the height of the entire vehicle. However, in order to smoothly and efficiently mix, stir, and transfer the soil and soil improvement material in the treatment tank 60, the number of the paddle mixers 64 is an even number, and the adjacent paddle mixers 64, 64 are mutually connected. It is desirable to set so as to rotate in the opposite direction.

Since the processing tank 60 is installed on the main body frame 2 together with other equipment and the like, its overall dimensions are restricted. In order to efficiently stir and mix in the restricted container. , A paddle mixer 64 is used. Both ends of the rotary shaft 65 of each paddle mixer 64 are
7 and 67, the tip of the rotating shaft 65 is connected to a driving unit 6 provided at the front end of the processing tank 60.
8 extending into the housing. A transmission gear 69 is connected to the tip of each rotating shaft 65.
9, 69 are mutually meshed. One transmission gear is connected to the output shaft of a hydraulic motor 70, and by rotating this hydraulic motor 70, both rotating shafts 65, 65 provided with paddles 66 are simultaneously driven in opposite directions. Is driven to rotate. Here, the bottom of the processing tank 60 has a curved surface shape that substantially matches the rotation trajectory of the paddle 66, thereby preventing earth and sand and soil improving material from staying at the corners and the like at the lower end of the processing tank 60. I have.

As described above, the processing tank 60 is connected to the inlet 62.
The processing tank 60 has a sealed shape except for the discharge port 63. However, solid foreign matter or the like may enter the processing tank 60, impeding the smooth operation of the paddle mixer 64, or in an extreme case, the operation of the paddle mixer 64. Or stop. When a solidifying material such as lime or cement is used as the soil improvement material, if the soil improvement material remains in the treatment tank 60, it can stick to the inner surface of the treatment tank 60 or the paddle 66. There is. In addition, paddle 66
Is worn out over a long period of time, and therefore needs to be repaired or replaced as appropriate. From the above, it is necessary to inspect the inside of the processing tank 60 and to repair it if necessary. For this purpose, an opening / closing door 71 is provided at an appropriate position on a side surface of the processing tank 60, and an inspection hole 72 provided with a lid is provided at an upper portion thereof. Further, if necessary, an opening / closing door may be provided on the upper portion, and the lower surface may be opened / closed.

In the treatment tank 60 having the above configuration, the earth and sand introduced from the inlet 62 and the soil improving material are uniformly stirred and mixed by the action of the paddle mixer 64 and transferred to the outlet 63. In the meantime, improved soil is produced.
The improved soil thus produced is discharged from the discharge port 63 to the improved soil discharge section 5 by the action of its own weight. Here, the improved soil discharging section 5 has a carry-out conveyor 80.

Next, FIG. 25 shows a state in which soil improvement processing is being performed using a soil improvement machine. The figure shows that a soil improvement machine is arranged in a small-scale yard to improve the soil quality of the soil previously deposited in this yard. Is required. For example, a hydraulic excavator PS is suitably used as the means for charging earth and sand.

Therefore, in order to improve soil quality in the yard,
Sediment deposited with a predetermined spread is picked up in order from the end by a bucket B of a hydraulic excavator PS, and put into a soil hopper 20 of a soil improvement machine. While the earth and sand is conveyed from the earth and sand hopper 20 by the carry-in conveyor 10, the earth improving material is supplied from the earth improving material hopper 30 and supplied onto the surface of the earth and sand. Then, a mixture of the earth and sand and the soil improving material is sent from the end of the carry-in conveyor 10 through the inlet 62 into the processing tank 60, and the soil and the soil improving material are separated by the action of the paddle mixer 64 provided in the processing tank 60. It moves to the position of the outlet 63 while being stirred and mixed. Then, the improved soil in the aggregated state is produced by uniformly mixing the earth and sand and the soil improvement material in the treatment tank 60. The improved soil is discharged from discharge port 63 to discharge conveyor 8
It is deposited at a predetermined position through 0.

When the earth and sand is taken into the soil improvement machine from the accumulation portion, a space is created at the site. By accumulating the sequentially produced improved soil in this space, most of the space in the yard can be substantially used as both a sediment accumulation site and an improved soil accumulation site, and the yard space is effectively used. Can be used. It is for this reason that the soil improvement machine is allowed to run on its own by the undercarriage 1, and as the work progresses, the undercarriage 1 is actuated and the soil improvement machine is moved as the sedimentation site recedes. Let it do.

As described above, when the produced improved soil is deposited at a predetermined position by the discharge conveyor 71, the soil may be deposited at the location where the soil has been removed from the location where the soil has been accumulated. However, since the improved soil has an aggregated shape, it may be desirable to classify the soil according to the particle size. Therefore, the sorting device 81 is provided. The sorting device 81 is configured as a portable type, and includes a sieve 82 and a transfer conveyor 83. The sieve 82 has a mesh size that allows passage of a particle having a predetermined particle size, for example, 13 mm or less, 20 mm or less, or 25 mm or less, and is desirably constituted by a vibrating sieve. After passing through the sieve 82, the improved soil having a uniform particle size is deposited on a predetermined deposition location by the transfer conveyor 83. Also,
Since the improved soil having a large particle size that has not passed through the sieve 82 has the same quality in that the solidification treatment has been performed,
The improved soil having a large particle size is used as it is or after being subjected to a process for equalizing the particle size, as a material for backfilling or the like.

The soil improvement machine is shared by a plurality of yards, so that a relatively small amount of earth and sand is improved in one yard, and then the soil improvement machine is transported to another yard. Perform improvement processing. For this purpose, as shown in FIG. 26, it is mounted on the carrier TR of the trailer TT and transported. When transported by the trailer TT, the length and width dimensions are also restricted to some extent, but the most important dimension is the height dimension. If this height is not kept as low as possible, it will not be possible to pass under guards or overpasses, so that the transport route will be severely restricted. When transporting with the trailer TT, it is conceivable to disassemble a part of the machine. However, this requires disassembly and assembly every time the machine is carried in and out of the yard, which makes the operation extremely troublesome.

As is apparent from FIG. 2, the highest position of the soil improvement machine is the soil improvement material hopper 30. Since the soil improvement machine is a self-propelled type, the main body frame 2 is provided on the lower traveling body 1, and the processing tank 60 is provided on the main body frame 2.
Further, the carry-in conveyor 10 is provided above the inlet 62 for receiving the earth and sand and the soil improving material in the processing tank 60, and the soil improving material is supplied from the upper portion of the carry-in conveyor 10. Therefore, the soil improving material hopper 30 is mounted on the base plate 32 located at the highest place.

The capacity of the storage tank 33 in the soil improvement material hopper 30 determines the continuous operation time of the soil improvement machine. The soil improvement is to be performed continuously, and if the soil and soil improvement material are supplied to the treatment tank 60,
It is continuously stirred and mixed, and the improved soil is continuously discharged. Therefore, continuous processing becomes possible as long as the supplied material is not stopped. Here, the materials to be supplied are earth and sand and a soil improvement material. While the soil and sand are sequentially supplied during the treatment, the soil improvement material is stored in a soil improvement material hopper 30 having a predetermined volume. Since it is supplied from the tank 33 and becomes a batch type, when the soil improvement material inside is completely consumed, it must be replenished.

From the above, the continuous operation time of the soil improvement treatment substantially depends on the volume of the storage tank 33. In order to be able to operate continuously for a long time, it is necessary to use a large storage tank. For this purpose, the diameter of the storage tank 33 is increased, or the height dimension is increased. The diameter of the storage tank 33 depends on the width of the vehicle, and at least cannot exceed the vehicle width. In addition, a crane 54 is provided on one side of the main body frame 2, and a space used as a passage or the like for an operator to perform operations such as machine maintenance is required on the other side. Therefore, the dimension in the width direction of the storage tank 33 cannot be increased unnecessarily.

In the height direction, since there is no substantial restriction on the mechanism described above, it is possible to increase the storage capacity of the storage tank 33 by the height dimension. However, as shown in FIG. 26, this soil improvement machine is a trailer TT
Is transported from yard to yard, and the height is restricted when passing on general roads. However, there is no restriction on the height within the yard.

This is why the storage tank 33 of the soil improvement material hopper 30 is provided with a bellows 37 as a height adjusting unit. When soil improvement is performed in the yard, the bellows 37 is extended. Operating state, and increase its internal volume. Further, the height dimension is shortened in the storage state during transportation. Thereby, the height dimension of the soil improvement machine is suppressed to a height or less that is limited during transportation.

In order to adjust the height of the storage tank 33, the stopper pin 47 screwed between the support rod 45 and the guide cylinder 46 is removed so that the support rod 45 can be moved up and down with respect to the guide cylinder 46. To Then, by pulling down or pulling up the top plate 36, the top plate 36 is displaced to a height position in the retracted state or the operating state. In this operation, as shown in FIG. 27, the suspension wire 84 is connected to the hook locking member 42 provided on the top plate 36, and the suspension wire 84 is connected to the hook 55 of the crane 54.
Can be easily performed by raising and lowering the wire 56. When the top plate 36 reaches a predetermined height position, the stopper pin 47 is inserted between the support rod 45 and the guide cylinder 46 to fix the top plate 36 at that position. The operation of raising and lowering the top plate portion 36 is not particularly different from the operation of supplying the soil improving material from the flexible container to the soil improving material hopper 30 as shown by the imaginary line in FIG.

As described above, the height of the storage tank 33 can be adjusted so that the soil improving material hopper 30 can be adjusted.
Up the bellows 37 constituting the storage tank 33 of
If the volume is increased and a large amount of soil improvement material is stored in the storage tank 33, the soil improvement machine can be operated continuously for a long time. Further, when the bellows portion 37 is lowered to lower the entire height of the storage tank 33, it is possible to reduce the size and size of the soil improvement machine as a whole, and particularly to shorten the dimension in the height direction. The machine can be transported smoothly without disassembling the machine. And the loading platform TR of the trailer TT of the soil improvement machine
Getting on and off the vehicle can be performed smoothly and quickly by operating the undercarriage 1 and causing the soil improvement machine to run on its own.

As the means for adjusting the height of the storage tank in the soil improving material hopper, a soil improving material hopper 90 shown in FIGS. 28 and 29, for example, can be used in addition to the bellows type. This soil improvement material hopper 9
Reference numeral 0 denotes a telescopic storage tank 91. The storage tank 91 has a lower tank 92 having an open upper end, and an upper tank 93 having an open lower end and fitted to the lower tank 92.
And a flexible sheet 94 is provided between the lower tank 92 and the upper tank 93. A shape-retaining cylinder 95 is mounted on the outer periphery of the upper tank 93. The shape-retaining cylinder 95 is provided with a stopper ring 96 provided near the lower end of the upper tank 93.
It can be moved up and down within the range regulated by.

From the upper end of the upper tank 93, 3
The support rods 97 of the book are suspended from each other.
Is slidably inserted into a guide cylinder 46 provided on the base plate 32 as in the above-described embodiment. Therefore, FIG.
As shown in FIG. 8, when the upper tank 93 is pulled up, the flexible sheet 94 expands, and the volume of the storage tank 91 increases by the length of the flexible sheet 94. In addition, at this time, the shape retaining cylinder 95 is lowered to a position where it comes into contact with the stopper ring 96, and is in a state of surrounding the flexible sheet 94. When the soil improving material is supplied to the inside, the flexible sheet 94 tends to bulge outward. However, since the shape-retaining cylinder 95 is disposed on the outer periphery, the flexible sheet 94 is provided. There is no danger that 36 will bulge.

On the other hand, as shown in FIG. 29, when the upper tank 93 is pulled down, the flexible sheet 94 bends, and after the shape-retaining cylinder 95 comes into contact with the support member 18, The shape retaining cylinder 95 stops at that position, and the upper tank 93 is pulled down to a predetermined position.
As a result, the height dimension of the entire soil improving material hopper 90 is reduced, and the overall height of the soil improving machine is reduced. As a result, it is convenient for transportation by a trailer or the like.

[0056]

As described above, according to the present invention, since the height of the soil improving material hopper in the soil improving machine can be adjusted, a large amount of the soil improving material can be used when performing the soil improving process. Can be stored and processed continuously for a long time, and when transporting the soil improvement machine, the entire height dimension can be shortened, so it is convenient to transport it with a trailer, etc. For example, it is possible to carry into a yard where a relatively small amount of sediment requiring soil improvement is accumulated and to perform necessary processing, thereby achieving an effect that the operation efficiency of the machine can be significantly improved.

[Brief description of the drawings]

FIG. 1 is a plan view of a self-propelled soil improvement machine showing one embodiment of the present invention.

FIG. 2 is a front view of FIG.

FIG. 3 is an exploded view showing a structure of each mechanism for performing soil improvement processing in FIG. 2 in an exploded manner.

FIG. 4 is a cross-sectional view of the earth and sand hopper according to the embodiment of the present invention.

FIG. 5 is a sectional view taken along line AA of FIG. 4;

FIG. 6 is a plan view of a sieve unit according to the embodiment of the present invention.

FIG. 7 is a front view of FIG. 6;

FIG. 8 is a front view of a soil improvement material hopper according to the embodiment of the present invention.

FIG. 9 is a plan view of FIG.

FIG. 10 is a front view similar to FIG. 8, showing the storage tank of the soil improvement material hopper in a stored state.

11 is a cross-sectional view of a base part forming a storage tank in the soil improvement material hopper of FIG.

FIG. 12 is a plan view similar to FIG. 9 with the opening / closing lid removed.

FIG. 13 is a cross-sectional view taken along the line BB of FIG. 9, with the base portion omitted.

FIG. 14 shows a first example of a bellows portion according to the embodiment of the present invention.
FIG. 3 is an explanatory diagram showing an example of the configuration.

FIG. 15 shows a second example of the bellows portion according to the embodiment of the present invention.
FIG. 3 is an explanatory diagram showing an example of the configuration.

FIG. 16 shows a third example of the bellows portion according to the embodiment of the present invention.
FIG. 3 is an explanatory diagram showing an example of the configuration.

FIG. 17 is a plan view of a feeder according to an embodiment of the present invention.

18 is a sectional view taken along the line CC of FIG.

FIG. 19 is a sectional view taken along the line DD in FIG. 18;

FIG. 20 is a front view showing a configuration of a crane installed in the self-propelled soil improvement machine according to one embodiment of the present invention.

FIG. 21 is a plan view of a processing tank in one embodiment of the present invention.

FIG. 22 is a front view of FIG. 21;

FIG. 23 is a sectional view taken along line EE of FIG. 21;

FIG. 24 is a sectional view taken along line FF of FIG. 21;

FIG. 25 is an operation explanatory view showing a state in which soil improvement is performed in the yard by the self-propelled soil improvement machine according to the embodiment of the present invention.

FIG. 26 is an external view showing a state in which the self-propelled soil improvement machine according to one embodiment of the present invention is being transported by a trailer.

27 is an operation explanatory view showing an operation of displacing the soil improving material hopper between the operation state shown in FIG. 8 and the storage state shown in FIG.

FIG. 28 is a cutaway front view of a main part of a soil improvement material hopper according to another embodiment of the present invention, showing the soil improvement material hopper in an operating state.

FIG. 29 is a fragmentary front view showing the soil improving material hopper of FIG. 28 in a retracted state.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Lower traveling body 2 Main body frame 3 Supply part 4 Processing mechanism part 5 Discharge part 10 Carry-in conveyor 20 Sediment hopper 12 Sieving means 30, 90 Soil improving material hopper 31 Support post 32 Base plate 33, 91
Storage tank 34 Feeder 35 Base 36 Top plate 37, 137, 237, 337 Bellows 37a, 137a, 237a, 337a Flexible sheet 37b, 137b, 237b, 337b Support bone 38 Stirring member 39 Communication hole 41 Opening / closing door 42 Hook 43 Cutter 43a Support arm 45, 97 Support rod 46 Guide cylinder 47 Stopper pin 54 Crane 55 Hook 60 Processing tank 64 Paddle mixer 84 Suspension wire 92 Upper tank 93 Lower tank 94 Flexible sheet 95 Shape retaining cylinder

 ──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Toshikazu Murai 650, Kandamachi, Tsuchiura-shi, Ibaraki Prefecture Within the Tsuchiura Plant of Hitachi Construction Machinery Co., Ltd. Inside the Tsuchiura Plant (72) Inventor Yasuharu Yamamoto 1-1, Yashita, Gasanki-cho, Okazaki City, Aichi Prefecture Hitachi Construction Machinery Co., Ltd. No. 2 Sun Inside Ritsukiki Co., Ltd.

Claims (8)

[Claims] 1. A carry-in conveyor for conveying earth and sand supplied from an earth and sand hopper and a soil improvement material supplied from a soil improvement material hopper to a main body frame connected to a traveling means, and a soil for mixing earth and sand with the soil improvement material. The soil improvement material hopper comprises a storage tank for the soil improvement material, and a feeder for supplying the soil improvement material from the storage tank, and at least a part of the circumferential body of the storage tank is directed vertically. Self-propelled soil improvement machine, characterized in that it is a height adjustment unit that changes the volume. 2. The storage tank according to claim 1, wherein the storage tank includes a hard top plate, a base portion having an opening at an upper portion and made of a hard container having a predetermined height, and being interposed between the base portion and the top plate portion. 2. The self-propelled soil improvement machine according to claim 1, wherein the height adjusting section has a bellows structure. 3. The bellows structure wherein a plurality of supporting bones are fixed at predetermined pitch intervals in a vertical direction so as to surround at least one of the inner and outer peripheries of a flexible tubular sheet. The self-propelled soil improvement machine according to claim 1, wherein the machine is configured. 4. A plurality of support rods are suspended from the top plate portion, and the base portion is mounted on the main body frame or a mounting portion including a pedestal fixedly provided on the main body frame. The support rod is inserted into the guide cylinder provided on the mounting part so as to be able to move up and down, and the support rod is provided on the guide cylinder at a position where the height adjustment part is extended upward and at a position where the height adjustment part is reduced downward. 3. The self-propelled soil improvement machine according to claim 2, wherein a locking means for selectively holding the soil is provided. 5. A cutter for severing a flexible container of soil improvement material at a predetermined depth position in the storage tank, the cutter being supported on a lower surface of the top plate, and a cutter in the top plate. 3. The self-propelled soil improvement machine according to claim 2, wherein an openable / closable lid is provided above the mounting position. 6. The self-propelled type as claimed in claim 1, wherein a rotary type agitating means in the hopper is provided at a lower portion of the storage tank for feeding the soil improvement material inside the storage tank to the feeder. Soil improvement machine. 7. The storage tank has an upper tank part closed at an upper end and an open lower end, and a lower tank part closed at a lower end and opened at an upper end, and the upper tank part is fitted in a telescopic shape. 2. An elastic sheet which is provided so as to extend between the opening sides of both tank portions, wherein a portion provided with the elastic sheet is used as the height adjusting portion. Self-propelled soil improvement machine. 8. The soil improvement processing means is characterized by comprising either a mixing mechanism for stirring and mixing the soil and soil improvement material or a crushing mechanism for hitting the soil and soil improvement material. The self-propelled soil improvement machine according to claim 1.