JP2000144716A - Mixing device of soil improving machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mixing device of a small-sized soil improving machine having a crush mixing device applicable to the grouping of small, medium and large-sized devices equivalent to kinds of soil to be treated even if treated capacity per time is different and capable of being conveyed. SOLUTION: A mixing device of a soil improving machine is grouped into kinds of small, medium and large sized machines having rotary hammers for mixing improved soil 71 put in a frame body 2 with soil improving agent 72 and crushingly mixing with fine-grained and improved soil having specific size. In that case, the rotary hammers are arranged to a rotary shaft 30 in a state capable of being oscillated and in the circumferential direction approximately uniformly, at the same time, the rotary hammers are formed in the shape of the approximately same outside appearance, and the number of the rotary hammers is reduced as the machine becomes smaller.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mixing device for a soil improvement machine for improving residual soil from a construction site or the like to a high quality soil or a mixing device for a self-propelled soil improvement machine.

[0002]

2. Description of the Related Art At present, it is common practice to recycle remaining soil that has lost its bearing capacity from a construction site or the like and cannot be used for backfilling, etc., by adding a soil improvement material to a good soil. The soil quality is improved by adding a predetermined amount of a soil conditioner to soft residual soil such as clayey soil and mixing with a mixing device. In addition, soft soil such as clayey soil may contain many contaminants such as fine (up to about 200 mm or less) concrete gala and ascongala rock. As an example of the mixing device of the above-described soil improvement machine, a type in which an object is thrown in from an upper supply port and dispersed and mixed by the impact force of a rotating rotor and a repulsion plate, for example, an impact mixer is known. ing. In addition, there is known a system in which an object is sent into a foreign object box-shaped tank in a horizontal or gentle inclination direction and mixed by a plurality of stirring blades provided in the box-shaped tank, such as a paddle mixer and a ribbon mixer. Have been. An example of an impact mixer is disclosed in Japanese Utility Model Laid-Open No. 6-52928. According to the publication, as shown in FIG. 5, centrifugal force is applied to a casing 53 provided with a supply port 51 for the residual soil and the soil improvement material at the upper part and a discharge port 52 for the modified mixed residual soil at the lower part. At least four drive rotors 54, 55, 56, and 57 in which a swingable hammer is divided and arranged in the shaft outer peripheral portion and the axial direction.
At least two are arranged in the upper and lower stages, and the upper driving rotors 54 and 55 and the lower driving rotors 56 and 57 are arranged in a staggered manner, and the remaining soil is mixed with the soil improving material. At this time, four hammers 61, 62, 63, 64, each of which is divided in the axial direction, are rotatable on each rotor via four hammer shafts fixed to the outer peripheral portion of the shaft 58 by blades. Attached to. In paddle mixers, ribbon mixers, etc., when processing the remaining soil containing foreign matter such as fine concrete ash and ascon gala rock, the foreign matter may be caught between the tank and the stirring blade or the stirring blade, causing damage to the machine. Become. To this end, the present applicant has adopted the advantages of conventional impact mixers, paddle mixers, and ribbon mixers, and has disclosed a cutting and crushing and mixing apparatus for soil provided with a cutting / mixing machine and a rotary striker. 9
No. 195266. FIG. 6 is a side cross-sectional view of a mixing device 10A of a medium-sized crushing and mixing device proposed in the publication. The box-shaped frame 2 is provided with an opening 2 e for receiving the soil 71 to be improved and the soil improving agent 72 which are conveyed by the conveyor 3. One rotary cutter 11 is provided near the opening 2e, and three rotary hitters 30A are provided at predetermined positions below the rotary cutter 11A. The rotary cutter 11 includes a drive shaft 11a and a plurality of cutters 11b attached to the drive shaft 11a. A discharge port 73 is provided at a lower portion of the frame 2. The rotary cutter 11 and the rotary striker 30A are driven to rotate by a driving device (not shown). Each of the rotary strikers 30A has a swingable blade body portion (actually open flat 6-5) which is oscillated by centrifugal force, similarly to Japanese Utility Model Laid-Open No. 6-52928.
2928) is divided into a shaft outer peripheral portion and an axial direction, and a plurality of hammers are rotatably mounted on three hammer shafts. In this hammer, four hammers are individually mounted on three hammer shafts so as to be rotatable in a circumferential direction.

Next, the operation will be described. A predetermined amount of remaining soil 7 to be improved transferred to the opening 2e by the transfer device 3
1 and the soil conditioner 72 are first cut and mixed to a predetermined size by the rotary cutter 11 driven to rotate,
The soil to be improved 71 and the soil conditioner 72 are primarily mixed. Next, it falls and is secondarily mixed by the three rotary impactors 30A, and is discharged from the discharge port 73 as high quality soil.

[0004]

Although the crushing and mixing apparatus having the above-described structure can provide improved soil quality, there are demands for small, medium and large sized ones. That is, the customer is required to group the data in this format. In particular, there is a need for a compact crushing and mixing device that can be transported. At this time, as processing capacity,
It is desired that the types and sizes of the soils to be treated are the same even if the processing volume per hour is reduced. That is, it is desired that the type of soil that can be processed by the medium machine as described above can be processed by the small machine. Even small-sized machines can process soils of small size that are of the same size (approximately 250 mm on each side) and contain contaminants such as ascongala rock. It is hoped that it can be done. Since the processing volume per hour is reduced, the improvement material hopper, earth hopper, transport device, power unit, and discharge conveyor can be easily downsized with a similar ratio according to the processing volume. On the other hand, the mixing equipment is required to process the same type as the medium-sized equipment even if the type and size of the soil is small, so by reducing the number of rows of hammers in the width direction of the crushing and mixing equipment, However, there is a problem that downsizing is difficult in the longitudinal direction of the body in the side sectional view of FIG. That is, similarly to the above, when the size is reduced by the similarity ratio, the space between the hammers becomes narrow, and similarly to the paddle mixer and the ribbon mixer, the foreign matter (maximum length of one side is about 250 mm) is caught between the hammers, and the machine stops. Has the problem of being damaged. In addition, when the hammer is made smaller with a similar ratio, the inertia force of the hammer becomes smaller, and the hammer's strong impact force (impact) causes the remaining soil, the lump of the remaining soil (improved soil), the fine contaminants, , The soil to be improved) cannot be destroyed or collapsed. Further, when the rotation speed is increased by reducing the weight of the hammer, the soil to be improved is repelled, and there is a problem that the soil to be improved and the soil improving material are not mixed well. When the size of the hammer is increased, increasing the size of the hammer at a similar ratio increases the inertia force of the hammer, and the hammer's strong impact force (impact) can destroy or break up the remaining soil mass, fine contaminants, and combined mass. However, there is a problem that the distance between the hammers is widened, so that the earth and sand of a predetermined size (grain size) cannot be obtained, and that the soil improving material and the soil to be improved do not mix very well.

The present invention pays attention to the above problems, and crushes suitable for small, medium, and large series in which the types and sizes of soil to be treated are the same even if the processing volume per time is different. It is an object of the present invention to provide a small-sized soil improvement machine capable of being transported by a mixing apparatus.

[0006]

In order to achieve the above-mentioned object, a first invention of a mixing apparatus for a soil improvement machine according to the present invention is provided with a soil to be improved and a soil improvement provided on a frame. In a mixing device of a soil improvement machine that is grouped into small, medium, and large types having at least a rotary impactor that crushes and mixes with a fine-grained improved soil of a predetermined size by mixing with the agent, the rotary impactor is The rotary impactor is arranged so as to be swingable on the rotating shaft and substantially evenly in the circumferential direction, has a substantially identical external shape, and has a configuration in which the number of rotary impactors decreases as the size becomes smaller. According to the above configuration, the soil to be improved and the soil conditioner introduced from the upper portion are subjected to a striking force by the rotary striker, cut into fine grains of a predetermined size required by the customer, and crushed. , And a soil conditioner. At this time, even if the soil to be introduced is small, medium and large, and the soil to be improved containing the same type of lump and foreign matter of the same size is thrown in, the small, medium,
In addition, since the rotary hitting element of the rotary hitting body of a large model has almost the same external shape, the rotation speed is almost the same and almost the same impact force can be obtained, so it is cut into fine grains of almost the same size. , Crushed. Therefore, according to the present invention, the rotary hitters have substantially the same external shape, so that the rotation speed can be substantially the same, and the number of rotary hitters decreases as the size becomes smaller, so that the distance between the rotary hitters is reduced. However, since the distance is substantially the same for small, medium, and large models, the amount of the injected soil to be injected between the rotary impactors is the same, and equivalently mixed quality can be obtained. In addition, by reducing the number of rotary hitting elements, the distance between the centers of adjacent rotary hitting bodies can be reduced, and the model can be downsized. This series can be applied to stationary and self-propelled impact mixers, or a disintegrating and mixing apparatus combining a stationary and self-propelled impact mixer with a paddle mixer and a ribbon mixer.

[0007] The number of rotary hitting elements is preferably at least three for small models. According to the above configuration, when a small model is used, if the number of rotary hitting elements is reduced to a similar ratio with four as in the prior art, the inertia force of the rotary hitting element decreases, and the rotational speed is increased in order to increase the impact force. However, in the present invention, the number of rotary impactors is three, so that the appearance (mass) of the rotary impactors can be made substantially the same, and even if the rotational speed is almost the same, almost the same impact force can be obtained. Can be given to the soil to be improved, and it is cut, crushed, and mixed into fine grains of almost the same predetermined size. Further, since the rotation speeds may be substantially the same, the soil to be improved and the soil improving material are not repelled, and the soil to be improved and the soil improving material are well mixed. Also, since the number of rotary strikers is three,
The swing angle of the rotary striker can be increased. Therefore, the distance between the centers of the adjacent rotary impacting bodies can be reduced, and the model can be downsized. In addition, many foreign substances such as concrete gala and ascongala rock having the same size as the medium-sized model pass between the rotary impacting elements. In addition, the soil to be improved is not clogged or the machine is not broken down. In addition, the longitudinal direction and the width direction of the vehicle body can be shortened, so that self-propelled work can be performed even in a narrow work site, and transport between the work sites is facilitated.

[0008] The rotary hitting element swingably attached to the rotary shaft is optimally designed so that the distance between the tip of the rotary hitting element is 120 mm or less when the rotary hitting element between the adjacent rotary hitting elements is fully extended. Is preferably 93 mm to 100 mm.
According to the above configuration, the injected improved soil hits the rotating hitting element and is successively subjected to the impact force by the rotating hitting element. Also, when passing between the next rotary striker,
If the separation distance of the tip of the rotary striker is 120 mm or less,
This prevents clogging between the rotary hitters, and also allows the rotary hitter to enter between the teeth of the next rotary hitter and is well stirred and mixed. According to the results of the experiment, if the width is too narrow, the material is clogged between the rotary hitters, and if the width is too wide, the fine grains become large and the quality of the improved soil is inferior.

In addition, the rotary hitting element swingably attached to the rotary shaft is optimally provided when the distance between the tip of the rotary hitting element is 200 mm or more when the rotary hitting element between the adjacent rotary hitting elements falls down to the maximum. Is preferably 213 mm or more. According to the above configuration, when the injected soil to be improved and the soil improving material are hit by the rotating hitter and are successively subjected to the impact force by the rotary hitter and pass between the next rotary hitting member and If the soil mass of the improved soil contains foreign matter, the foreign matter defeats the rotary striker, and if the foreign matter is large, the machine is clogged or the machine is damaged. For this reason, when the rotary hitting element falls down to its maximum, the separation distance of the tip of the rotary hitting element is 2
It is preferably at least 00 mm, and most preferably at least 213 mm. Also, since the upper limit affects the size of the machine,
It is determined from the fact that it is sufficient if there is an interval at which a soil block having a maximum length of one side of about 250 mm passes.

In addition, a vehicle body having a traveling body, a soil hopper disposed at one end in the front-rear direction of the vehicle body for charging soil to be improved, and a soil improvement disposed adjacent to the soil hopper and charging a soil improving material are provided. A material hopper, a transporting unit for receiving the soil to be improved from the soil hopper and the soil improving material from the soil improving material hopper, and transporting the soil into the mixing unit frame, and the soil to be improved disposed in the frame and transported by the transporting unit. Self-propelled consisting of a mixing section that mixes soil improvement material, a discharge belt conveyor that carries out the improved soil mixed in the mixing section, and a power source that drives the traveling body, the transport section, the mixing section, and the discharge belt conveyor. In the mixing device of the type soil improvement machine, the rotary hitting body of the mixing section, which is disposed in the frame and mixes the soil to be improved and the soil improvement material, is configured such that the rotary hitter is swingable about the rotation axis, and extends in the circumferential direction. Almost evenly arranged,
The rotary hitting element has substantially the same external shape, and the number of rotary hitting elements is three in a small model having a small processing volume per hour of the improved soil. According to the above configuration, the soil to be improved from the soil hopper and the soil improvement material from the soil improvement material hopper are received and transported by the transport unit, and the soil to be improved having a size equal to or less than a predetermined size is obtained at the entrance in the frame. It is carried into the frame. The soil to be improved and the soil improvement material carried into the frame are cut and mixed by a rotary hitter in the mixing section, and are improved into fine-grained soil of a predetermined size. At this time, the small model of the present invention has almost the same outer shape of the rotary hitting element as the medium type model, so that the mass of the rotary hitting element is also almost the same as the medium type model, and the same impact force as the medium type model when the rotation speed is the same. Is obtained, and the amount of the soil to be improved and the soil improvement material that enter between the teeth is the same, so that equivalently mixed quality is obtained. Furthermore, in the small model of the present invention, since the number of rotary hitters is reduced to three, the swing angle of the rotary hitter can be increased, so that the turning radius of the tip of the rotary hitter at the maximum swing can be reduced. In addition, the distance between the centers of adjacent rotary impacting bodies can be reduced, and the model can be downsized. Therefore, as described above, in the present invention, the number of rotary hitting elements is three, so that the model can be downsized, and the impact force of the rotary hitting body can be made substantially the same as that of a medium-sized model, and adjacent to each other. Even if the distance between the centers of the rotary impacting bodies is reduced, the distance between the tips of the rotary impactor at the maximum swing can be almost the same as that of the medium-sized model. And the distance between the tips of the rotating hitters at the time of maximum swing can be made almost the same size as the medium-sized model, even if the intermediate distance between adjacent rotating hitting bodies is small. Etc. pass between the rotary strikers,
It does not clog or damage the machine and passes between the rotary strikers. In the above-mentioned claim 2 (paragraph (00)
07)).

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a mixing apparatus for a soil improvement machine according to the present invention will be described below in detail with reference to FIGS. First, the mixing device 1 will be described with reference to FIGS. FIG. 1 is a side cross-sectional view of a mixing unit 10 of a mixing device 1 for crushing and mixing the soil to be improved and a soil improvement material, and FIG.
FIG. 3 is an enlarged view of a rotary hitting body. FIG. 3A shows a rotary hitting body of the present invention, and FIG. 3B shows a conventional rotary hitting body for comparison. 1 and 2, the mixing device 1
It comprises a frame 2 and a mixing section 10. Further, the mixing device 1 is disposed substantially at the center of the frame 2. Frame 2
Are a front frame 2A, a rear frame 2B, and a soil seal 2C.
It consists of The front frame 2A and the rear frame 2
B is connected in a substantially central portion, and has a divergent box shape whose length is larger at the lower side than at the upper side. The soil seal 2C is attached to the front frame 2A, guides the soil 71 and the soil improving material 72 transported by the transport unit 3 to the mixing unit 10 and prevents the soil from spilling sideways on the way. ing.

The mixing section 10 comprises a rotary cutter 11 and three rotary impacting bodies 21, 22, 23. As shown in FIG. 2, the rotary cutter 11 includes a bearing 1 on a front frame 2A.
2, is removably attached to a cutter shaft 13 rotatably supported via the shaft 2, and is rotated counterclockwise in the figure by a cutter hydraulic motor 14. This rotary cutter 11
It is disposed at the terminal end of the transport unit 3 and above the transport unit 3. The six rotary cutters 11 are arranged side by side in the width direction of the mixing unit 10 in the number of rows. Also, the rotary cutter 1
Reference numeral 1 denotes a structure which descends under its own weight, lifts up (arrow VA) with respect to a force acting from below, and is swingable. ing.

As shown in FIG. 1, the three rotary hitting bodies 21, 22, and 23 are provided at a right lower portion of the rotary cutter 11 at a first position.
The rotary hitting body 21 is attached to the rear frame 2B, and is driven by the cutter hydraulic motor 25 so as to rotate counterclockwise in the drawing. The second rotary hitting body 22 includes the rotary cutter 1
1 and attached to the front frame 2A at the lower left side of the first rotary hitting body 21, and is driven by a cutter hydraulic motor 25 so as to rotate counterclockwise in the drawing. Third
The rotary hitting body 23 is attached to the front frame 2A below the first rotary hitting body 21 and on the lower right side of the second rotary hitting body 22, and is used for a cutter so as to rotate clockwise in the drawing. It is driven by a hydraulic motor 25.

The three rotary impacting bodies 21, 22, 23 have
Three rotary hitting elements 26, 27, 28 (shown in FIG. 3) are attached to the rotary hitting bodies 21, 22, 23, respectively.
0 is mounted on the same plane of the paper at a position that is swingable via a pin 31 and is even in the circumferential direction. The three rotary hitters 26, 27, 28 have the same appearance. The three rotary hit bodies 21, 22, 23 are:
Two mixing units 10 are arranged side by side in the width direction. A discharge belt conveyor 32 is provided below the third rotary impacting body 23, and discharges the improved soil crushed and mixed in the frame to the other end in the front-rear direction of the vehicle body.

Next, the operation will be described with reference to FIGS. According to the self-propelled soil conditioner 40 of the present invention, the soil 71 to be improved is put into the soil hopper 43 described later by a hydraulic shovel or the like, and the soil conditioner 72 is put into the soil hopper 44. Soil hopper 43 and soil improvement material hopper 4
A predetermined amount of soil improvement material 72 such as the soil 71 to be improved and lime which have fallen from 4 are received and transported by the transport unit 3 such as a belt conveyor. The soil 71 to be improved and the soil improvement material 72 transported by the transport unit 3 are carried into the frame 2 of the mixing unit 10.
In the frame 2, the improved soil 71 and the soil improvement material 72 are cut and mixed by the rotary cutter 11 disposed at the end of the transport unit 3 and above the transport unit 3, The rotary cutter 11 flies toward a first rotary hitting body 21 disposed diagonally below and to the right of the rotary cutter 11.

Since the first rotary hitting body 21 is provided with three rotary hitting elements 26, 27, and 28 having substantially the same appearance as the medium-sized model, the rotation speed is substantially the same as that of the medium-sized model as described above. Can be made the same, and the rotary striker 26, 27, 28
Because the circumferential distance Cm of the tip of the shaft also increases, the rotary hitting element 26,
The soil to be improved 71 and the soil quality improving material 72 enter between the spaces 27 and 28, and are well stirred and mixed. The improved soil 71 and the soil improvement material 72 crushed and well mixed by the first rotary hitting body 21 are disposed below the rotary cutter 11 and on the lower left side of the first rotary hitting body 21. The first rotary hitting body 21 flies toward the second rotary hitting body 22. In the second rotary hitting body 22, the first rotary hitting body 2
1, the rotary hitting elements 26, 2
The soil 71 to be improved and the soil quality improving material 72 enter well between 7, 28, and are well stirred and mixed. The third rotary hitting body 23 also includes the first rotary hitting body 21 and the second rotary hitting body 22.
After being stirred well and mixed to form an improved soil, it falls to a discharge belt conveyor 32 disposed below the inside of the frame 2. The dropped improved soil is discharged from the discharge belt conveyor 32 by a discharge conveyor 46 outside the frame.

FIG. 3 shows a conventional medium-sized model 4.
Three rotary hitters 26, 27, 28 are provided for the center distance (Lb) of rotary hitters 21, 22, 23 provided with rotary hitters 26, 27, 28, 29, respectively. The center-to-center distances (La) of the rotary hitters 21, 22, 23 are the same, and the rotary hitters 26, 2 having the same external shape are used.
It is a figure which shows the comparison which clarifies the difference at the time of using 7, 28, 29, and making the number of rotary strikers into three. As described above, FIG. 3A shows the rotary hit body of the present invention, and FIG.
(B) shows a conventional medium-sized rotary hitting body for comparison. In FIG. 3, when the capital letters of the alpha bed are the same, the same meaning is indicated, the attached character a indicates the case of three rotary hitters, and the attached character b indicates the case of four rotary hitters. The codes of the rotary impactor and the impact rotary body are omitted because they are duplicated and difficult to read. Also,
Three of the rotary hitters are 26, 27, and 28, and four of the rotary hitters are 26, 27, 28, and 29. The codes of the rotary hitter and the impact rotary member are duplicated and are difficult to read. Omit to do so. In FIG. 3 (a), when the number of rotary hitting elements of the rotary hitting body is reduced to three, the rotary hitting element falls down to the maximum, that is, the rotary hitting element contacts the rotary shaft 30 for hitting. The maximum swing angle of the rotating striker Θa
Can be increased. At this time, the maximum swing angle is a swing angle Θa of an angle at which the tip of the rotary striker and the rotary shaft 30 abut on a line Na connecting the center of the rotary shaft 30 for hitting and the center of the pin 31; The maximum swing angle Θa can be increased by setting three to the maximum swing angle ３b of the four rotary hitting elements. Further, in the figure, the pin radius Ra for attaching the pin 31 to the striking rotary shaft 30 can be reduced, and even if the pin radius Ra is reduced, the maximum swing angle Θ
a can be increased by using three rotary hitters for four rotary hitters.

Therefore, when the rotary percussion element between the adjacent rotary percussion members is maximally extended, the separation distance Ha between the tips of the three rotary percussion elements becomes larger than the separation distance Hb between the four rotary percussion element tips. Similarly, when the rotary striker between the adjacent rotary strikers falls down to the maximum, the separation distance Ka between the tips of the three rotary strikers is reduced.
Is wider than the separation distance Kb between the tips of the four rotary impactors. As described above, the pin 31 is connected to the striking rotation shaft 30.
Can be made smaller than the pin radius Rb in the case of three. This also gives
When the rotary hitting element is fully extended, the three rotary hitting element tip radii Ja are smaller than the four rotary hitting element tip radii Jb.

As described above, the rotary hitters having the same external shape are used, and the distance between the rotary hitters between the adjacent rotary hitters is the distance Hb between the tips of the rotary hitters when the rotary hitters extend at the maximum, and the distance between the adjacent rotary hitters. Even if the separation distance Kb of the tip of the rotary hitting element when the rotary hitting element falls down to the maximum is the same as that of the conventional medium-sized model, the number of rotary hitting elements is set to three to reduce the number of the rotary hitting elements of the four types. 3 for the center-to-center distance (Lb)
The center-to-center distance (La) between the rotary impactors can be significantly reduced. In addition, the radius of rotation of the three hitting jaws when the rotary hitting element is at its maximum extension is smaller than the radius of tip of the four rotary hitting pieces Jb. The distance Ta between the tips can also be reduced. Therefore, by reducing the number of rotary impactors to three, the longitudinal dimensions of the body of the front frame 2A and the rear frame 2B can be significantly reduced, and the mixing section 10 of the mixing apparatus 1 can be reduced.
Can be reduced in size. As a result, a compact soil improvement machine capable of processing the improved soil 71 containing the same large lump of contaminants as the medium-sized machine is obtained.

Next, assuming that the number of rotary hitting elements is three, the distance La between the centers of the rotary hitting elements, the distance Ha at the tip of the rotary hitting element when the rotary hitting element extends at maximum, and the rotation between adjacent rotary hitting elements. Separation distance K of the tip of the rotating striker when the striker falls down to its maximum
a and the level test was performed with the support part separation distance Qa changed. The results are shown in Table 1.

Table 1

According to the test results, the level 1 indicates that the rotating hammer has a distance Ha of the tip of the rotating hammer at the time of maximum extension and the rotating hammer between the adjacent rotary hitters, despite the small soil improvement machine. Distance K at the tip of the rotary striker when
a, and the support portion separation distance Qa is made substantially the same as that of the medium-sized model, so that the improved soil 71 containing impurities and the like of the same size corresponding to the medium-sized model, except for the processing volume per hour,
Was obtained, and the desired value of the mixing property between the soil 71 to be improved and the soil improvement material 72 was obtained. In level 2, the distance La between the centers of the rotary impacting bodies is set to a distance 545 mm, which is almost the same as level 1.
In addition, the distance Ha of the tip of the rotary hitter when the rotary hitter is maximized is set to 100 mm, and the distance Ka between the tip of the rotary hitter when the rotary hitter between adjacent rotary hitters is at the maximum collapse. Was set to 167 mm and the support portion separation distance Qa was set to 245 mm, so that the mixing property between the soil 71 to be improved and the soil improving material 72 was good, but the clogging between the rotary impactor and the support portion was reduced. occured. Level 3 is
The distance La between the centers of the rotary hitting bodies is set to 613 mm, and the separation distance Ha of the tip of the rotary hitting element when the rotary hitting element is fully extended is set to 13.
4 mm, the separation distance Ka of the tip of the rotary striker when the rotary striker between the adjacent rotary strikers falls to the maximum is 233 mm,
And, since the support portion separation distance Qa was set to be large to 338 mm, no clogging was observed between the rotary hitters and between the support portions, but the value required for the mixing property of the soil 71 to be improved and the soil improving material 72 was Could not be obtained. Level 4 is almost the same as Level 1 and Level 2; the distance Ha at the tip of the rotary impactor when the rotary impactor is at maximum extension is 100 mm;
And the support part separation distance Qa between the level 2 and the level 2 is 270 mm.
The distance La between the centers of the rotary hitting bodies is set to 650 mm, and the distance Ka between the rotary hitting elements between the adjacent rotary hitting elements when the rotary hitting element falls down to the maximum is set to 264 mm. No soil clogging was observed between the support portions, and a value that required the mixing property of the soil 71 to be improved and the soil quality improving material 72 was obtained, but the center distance La was increased and miniaturization was not obtained.

According to the above results, in the mixing apparatus 1 of the soil improvement machine in which the number of the rotary hitters is at least three in a small model, the rotary hitter swingably attached to the rotary shaft 30 for hitting. The child has a separation distance of 120 mm or less at the tip of the rotary hitter when the rotary hitter between adjacent rotary hitters is at maximum extension.
Optimally, it should be 93 mm to 100 mm. The rotary striker swingably attached to the rotary shaft 30 for impact has a separation distance of 200 mm or more at the tip of the rotary striker when the rotary striker between adjacent rotary hitters falls down to the maximum.
Optimally, it is preferably 213 mm or more. A rotary shaft 30 for hitting the rotary hitter so as to swing freely.
Means that the distance between the outer peripheral portions of the adjacent impact rotary shafts 30 is 250
It has been found that a good result is obtained when the distance is at least 270 mm, optimally at least 270 mm.

The rotary impact bodies 21, 2 of the mixing section 10 described above
An example of the self-propelled soil conditioner 40 using the mortar 2, 23 is shown in FIG.
It is configured as shown in FIG. In FIG. 4, the self-propelled soil conditioner 40 is provided with a lower traveling body 41 which can travel by a traveling motor (not shown). A vehicle body 42 is disposed above the lower traveling body 41. A support frame 48 is integrally fixed in front of one end of the vehicle body 42. The soil hopper 43 and the soil hopper 4
A soil improving material hopper 44 is placed adjacent to and is fixed to the hopper 3. The soil hopper 43 and the soil improvement material hopper 4
Of the discharge belt conveyor 32 disposed below the
It is arranged in.

FIG. 4 shows the rotary hitting body 2 of the mixing section 10 of the present invention.
1, 22, 23, that is, the rotary impactors 26, 27, 28 have substantially the same external shape, and the self-propelled soil conditioner 4 equipped with the mixing unit 10 having different treatment volumes per hour of the improved soil.
FIG. The self-propelled soil improvement machine 40 has a mixing unit 10 mounted at a substantially central portion of a vehicle body 42 having a crawler-type lower traveling body 41, and a soil hopper 43 and an improvement material at one end of a front portion of the mixing unit 10. A hopper 44 is provided, and the transport device 3 is mounted below the hopper 44. A power unit 45 and a discharge conveyor 46 are mounted on the multi-end side at the rear. The self-propelled soil improvement machine 40 is provided with a crawler-type lower traveling body 41 that can travel freely by a traveling motor (not shown). A vehicle body 42 is disposed above the crawler-type lower traveling body 41.
A support frame 48 is integrally fixed in front of one end of the vehicle body 42. The soil hopper 4 is
3 and a soil improvement material hopper 44 is placed and fixed adjacent to the soil hopper 43. The self-propelled soil improvement machine 40 can move to a predetermined work site and perform soil improvement work. Moreover, the rotary strikers 26, 27,
28 has almost the same external shape, and adopts a small number of rotary hitters 26, 27 and 28 as three,
The distance between the centers of the adjacent rotary impacting bodies 21, 22, and 23 can be reduced, so that the model can be downsized.
2 and 23, the rotary striker 26, 27, 28
Pass without jamming or causing machine failure.
In addition, the longitudinal direction and the width direction of the vehicle body can be shortened, so that self-propelled work can be performed even in a narrow work site, and transport between the work sites is facilitated. The self-propelled soil improvement machine 40
May be of a wheel type.

In the above, when a large soil improvement machine is required, the number of rotary impactors mounted on the same surface of the paper at equal positions in the circumferential direction is increased to five or six, This can be obtained by increasing the number of rows of rotary impacting bodies in the width direction of the airframe, that is, the number of rows of rotary impacting bodies arranged in the width direction of the mixing unit 10 to four or five. Further, at this time, the rotary hitting element has the same external shape, the separation distance Ha at the tip of the rotary hitting element when the rotary hitting element extends at the maximum, and the rotary hitting element between the adjacent rotary hitting elements falls to the maximum. Separation distance K of the tip of the rotating striker at the time
a, and the support portion separation distance Qa is made substantially the same, and the center distance La of the rotary hitting body is increased, so that the soil 71 to be improved and the soil improvement material 72 carried into the frame are mixed with the mixing portion 10.
Is cut and mixed with a rotary impacting body to improve the fine-grained soil of a predetermined size. In addition, even if a lump of contaminants or the like having the same size as the medium-sized model passes between the rotary impacting bodies, they pass without being clogged or causing the machine to fail. Also, in the above,
The self-propelled soil conditioner 40 has been described, but the present invention can also be applied to a stationary soil conditioner.
It is also applicable to the impact mixer disclosed in No. 2928.

[Brief description of the drawings]

FIG. 1 is a side sectional view of a mixing section of a mixing device according to the present invention.

FIG. 2 is a front sectional view of a mixing section of the mixing apparatus according to the present invention (a view taken along the line AA in FIG. 1).

3A and 3B are enlarged views of a rotary hitting body. FIG. 3A is a side view of the rotary hitting body of the present invention, and FIG. 3B is a side view of a conventional rotary hitting body for comparison. .

FIG. 4 is an overall external view of a self-propelled soil improvement machine having the mixing device of the present invention.

FIG. 5 is a side sectional view of a cutting / mixing unit of the first embodiment of the conventional mixing apparatus.

FIG. 6 is a side sectional view of a cutting / mixing unit of a second embodiment of the conventional mixing apparatus.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Mixing device of a soil improvement machine (crushing mixing device), 2 ... Frame, 3 ... Conveying unit, 10 ... Mixing unit, 11 ... Rotating cutter, 1
2: Cutter mounting member, 13: Cutter shaft, 21, 22,
Reference numeral 23: rotary impacting body, 26, 27, 28, 29: rotary hitting element, 30: rotary shaft for impacting, 31: pin, 32: discharge belt conveyor, 40: self-propelled soil improvement machine, 41: lower traveling body, 42 ... body, 43 ... soil hopper, 44 ... soil improvement material hopper, 45 ... power unit, 46 ... discharge conveyor, 71 ... soil to be improved, 72 ... soil improvement material.

[Table 1]

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2D040 AB07 CD07 EB04 4D065 AA02 BB03 EA05 EB03 ED02 ED12 ED45 4D067 CG08 CG09 DD04 DD13 DD14 4G037 AA06 EA03 4G078 AA03 AA07 AA15 AB20 BA01 BA07 DA09 CA01

Claims (6)

[Claims] A rotary striker (26,) disposed on a frame (2) for mixing a soil to be improved (71) and a soil conditioner (72) and crushing and mixing into a fine-grained soil of a predetermined size. In the mixing equipment (1) for soil improvement machines which are classified into small, medium and large models, which have at least 27, 28), the rotary striker (26, 27, 28)
Are rotatable about the rotating shaft (30) and are arranged approximately evenly in the circumferential direction, and the rotary striking elements (26, 27, 28) have almost the same external shape, and are becoming smaller. Therefore, a mixing device for a soil improvement machine, characterized in that the number of rotary impactors (26, 27, 28) is small. 2. The mixing device for a soil improvement machine according to claim 1, wherein the number of rotary impactors (26, 27, 28) is at least three for small models. . 3. A rotary hitting element (26, 27, 28) swingably attached to a rotary shaft (30) in the mixing device for a soil conditioner according to claim 2, 21, 22, 2
3) When the rotary hitter between (26, 27, 28) is at maximum extension, the separation distance of the rotary hitter tip is 120mm or less, and optimally,
A mixing device for a soil improvement machine having a size of 93 mm to 100 mm. 4. The mixing device for a soil conditioner according to claim 2, wherein the rotary hitters (26, 27, 28) swingably attached to the rotary shaft (30) are adjacent rotary hitters (26). 21, 22, 2
3) When the rotary hitter between (26, 27, 28) falls down to its maximum, the separation distance of the rotary hitter tip is 200mm or more.
A mixing device for a soil improvement machine having a size of 213 mm or more. 5. A mixing device for a soil improvement machine according to claim 2, wherein the rotary shaft (30) for swingably holding the rotary striker (26, 27, 28) is provided on the outer periphery of the adjacent rotary shaft (30). The distance between clubs is 2
A mixing device for a soil improvement machine having a size of 50 mm or more, and most preferably 270 mm or more. 6. A vehicle body (42) having a traveling body (41) and a vehicle body (4).
A soil hopper (43) that is disposed at one end in the front-rear direction of 2) and receives the soil to be improved (71), and a soil that is disposed adjacent to the soil hopper (43) and receives the soil improving material (72). Improved material hopper (44), soil to be improved (71) from soil hopper (43) and soil quality improving material hopper (44)
Transport section (3) that receives the soil improvement material (72) from the country and carries it into the mixing section frame (2), and the soil to be improved (71) that is arranged inside the frame and transported by the transport section (3) and Mixing section for mixing soil improvement material (72)
(10), a discharge belt conveyor (46) for discharging the improved soil mixed in the mixing section (10), a traveling body (41), a transport section (3), a mixing section (10), and a discharge belt conveyor. In the mixing device (10) of the self-propelled soil improvement machine including the power source (45) for driving the (46), the soil to be improved (71) and the soil improvement material (72) ), The rotary impacting body (21, 22, 2) of the mixing section (10)
3), the rotary percussion elements (26, 27, 28) are swingable about the rotating shaft (30) and are arranged substantially evenly in the circumferential direction, and the rotary percussion elements (26, 27, 28) Is a mixing device for a soil improvement machine, characterized in that, for a small model having substantially the same external shape and a small processing volume per hour of the improved soil, the number of rotary impactors (26, 27, 28) is three. .