JP5019985B2 - Soil improvement machine, hopper and transfer device used therefor - Google Patents

Description

  The present invention relates to a soil improvement machine, and more particularly to a soil improvement machine that improves soil quality by mixing soil and a soil improvement agent. Further, the present invention is provided in a soil improvement machine, in which the soil is thrown in and a hopper for guiding the thrown-in soil to a lower conveyor belt conveyor, and the introduced soil is transported to a mixer with a soil quality improvement material. The present invention relates to a transfer device.

  For example, in water and sewage and gas pipe burying work, it is common to bury a pipe after burying a pipe in a groove excavated by a construction machine such as a hydraulic excavator. However, if the soil excavated in the trench is clay or clay with a lot of moisture, it may not be used for backfilling. Moreover, when constructing a building on soft ground, after excavating the soft soil at the site to a predetermined depth, the ground is improved by replacing the excavated soil with good quality soil.

In the above cases, soil improvement processing is performed in which soil improvement agents such as lime and cement are mixed and solidified in soil that cannot be used for backfilling or soft soil, and can be reused. And the soil improvement machine for this soil improvement process is proposed (for example, patent documents 1).
JP 2001-73403 A

  The soil improvement machine as described above generally includes a raw soil hopper into which raw soil is introduced from a hydraulic excavator or the like, a conveyor belt conveyor for transporting the raw soil dropped from the raw soil hopper, and a soil improvement agent. It has an improving agent hopper to be supplied, a mixer for mixing the raw material soil and the soil condition improving agent, and a discharge belt conveyor for discharging the mixed raw material soil and the soil condition improving agent.

  Here, paying attention to the raw soil hopper, the raw soil hopper is composed of a pair of inclined frame bodies that open upward and a pair of vertical wall portions that extend downward from the lower ends of the pair of inclined frame bodies. ing. And the raw material soil thrown into the inclination frame falls to the belt conveyor for conveyance below from an inclination frame through a vertical wall part.

  At this time, when clay clay soil with high viscosity (hereinafter simply referred to as viscous soil) is supplied to the soil conditioner using a hydraulic excavator, the soil block having a shape close to the bucket shape of the hydraulic excavator is put into the raw soil hopper as it is There are many. The situation at this time is schematically shown in FIG. FIG. 1 shows an example in which soil is thrown into the raw soil hopper 100 from a bucket 101 of a hydraulic excavator. As shown in FIG. 1, the earth lump 102 charged by the bucket 101 generally has a width wider than the interval (input width) between the pair of vertical wall portions 100 a of the raw soil hopper 100. Many. For this reason, the thrown-in block 102 first collides with the inclined portion 100b and partly collapses, and then collides with the bent edge portion that is the boundary portion between the inclined portion 100b and the vertical wall portion 100a and is sheared. It will fall to.

  However, when highly viscous clay soil is put into the raw material soil hopper, the soil mass is hardly sheared. Then, when the clay soil mass is continuously put in the raw soil soil hopper and the clay soil is not collapsed, as shown in FIG. 2 (a), the vertical wall portion 100a is clogged. As shown by 2 (b), only the lower part of the mass may fall and the upper part may remain, causing cross-linking. If such a state occurs, the raw soil will not be properly supplied to the conveyor belt conveyor side.

  According to the applicant's research and experiment, it has been found that the above-described cross-linking hardly occurs by increasing the distance between the pair of vertical wall portions. However, if the distance between the pair of vertical wall portions is increased, the width of the conveyor belt conveyor disposed downstream of the raw soil hopper needs to be increased accordingly. There is. Moreover, in the soil improvement machine, generally, the fixed quantity supply mechanism for supplying fixed quantity of raw material soil toward a mixer is provided in the downstream part of the conveyor belt for conveyance. That is, the conveyance amount of the raw material soil is regulated by the quantitative supply mechanism. For this reason, in the raw material soil hopper on the upstream side of the quantitative supply mechanism, it is impossible to widen the distance between the pair of vertical wall portions and supply a large amount of raw material soil to the conveyor belt conveyor at a time.

  An object of the present invention is to make it difficult for soil clogging and cross-linking to occur in a hopper into which raw soil is charged.

  Another object of the present invention is to provide a hopper that can continuously and appropriately supply the raw material soil to the downstream conveyor belt conveyor without affecting other configurations.

The soil improvement machine hopper according to the first aspect of the present invention is provided in a soil improvement machine that improves soil quality by mixing soil and a soil improvement agent. The soil is introduced and the introduced soil is transferred to a lower belt conveyor. A hopper for guiding, and includes a hopper body, an introduction portion, a pair of lower shearing portions, and a pair of upper shearing portions. The hopper body includes a pair of inclined frame bodies that open to open upward. The introduction part is formed to extend downward from the lower ends of the pair of inclined frame bodies, and includes a pair of lower frame bodies for guiding the soil put into the inclined frame bodies to the conveying belt conveyor. The pair of lower shearing portions is formed of a bent edge portion formed at a boundary portion between the pair of inclined frame bodies and the pair of lower frame bodies, and applies a shearing force to the input soil mass. The pair of upper shearing portions are provided above the pair of lower shearing portions at a wider interval than the pair of lower shearing portions, and apply a shearing force to the input soil mass. The pair of inclined frame bodies of the hopper main body are provided between a first inclined portion that is inclined at a first inclination angle with respect to the horizontal plane, and between the first inclined portion and the lower frame body, and are first relative to the horizontal plane. A second inclined portion that is inclined at a second inclination angle larger than the one inclination angle. And a pair of upper shearing part consists of the bending edge part formed in the boundary part of a 1st inclination part and a 2nd inclination part, and the length of a 1st inclination part is longer than the length of a 2nd inclination part.

  In this hopper, soil as raw soil is put into the hopper body from a hydraulic excavator or the like. The soil thrown into the hopper body is guided downward along the pair of inclined frame bodies, and is further supplied to the lower conveyor belt via the introduction portion.

  At this time, when highly viscous clay is introduced into the hopper from the bucket of the hydraulic excavator, the conventional hopper accumulates the soil block with difficulty in collapsing, and clogging or bridging may occur. However, in the present invention, since the two shearing portions are provided at the top and bottom, the input soil mass is liable to collapse and cross-linking is unlikely to occur. Specifically, the charged soil mass is first sheared at the upper shearing portion. Then, the earth lump remaining without being sheared by the upper shearing part is pushed downward from above by the earth lump to be input next, and at this time, it is sheared by the lower shearing part.

For this reason, in the hopper of this invention, compared with the conventional hopper, a lump is easy to collapse, and an appropriate amount of raw material soil can be continuously supplied to the conveyor belt conveyor .

Moreover, in this hopper, the bending edge part is formed in a pair of inclination frame. That is, the upper part (first inclined part) of the inclined frame body is inclined at a first inclination angle with respect to the horizontal plane, and the lower part (second inclined part) is inclined at a second inclination angle larger than the first inclination angle. ing. This boundary portion is a bent edge portion. Therefore, this bent edge portion functions as an upper shearing portion.

  Here, for example, by bending the upper part of the inclined frame body to form a bent edge portion, the upper shearing portion can be configured, and the upper shearing portion can be realized at low cost.

The hopper of the soil improvement machine according to the second aspect of the present invention is the hopper of the first aspect , wherein the second inclined angle of the second inclined portion is not less than 60 ° and not more than 75 °.

  Here, the 2nd inclination angle of the 2nd inclination part is set as 60 degrees or more and 75 degrees or less exceeding 45 degrees which are the maximum repose angles of soil. Here, when the second inclination angle exceeds 75 °, the difference between the distance between the pair of lower shear portions (shear width) and the distance between the pair of upper shear portions (shear width) becomes small, and the two shear portions The effect of providing is reduced. On the other hand, if the second inclination angle is made smaller than 60 °, the inclination of the second inclined portion becomes too loose, and it becomes difficult for the earth lump to fall downward along the second inclined portion, so that the soil is not in the second inclined portion. Will be deposited.

  Therefore, in the present invention, the second inclined angle of the second inclined portion is set to 60 ° to 75 ° exceeding the maximum repose angle of the soil, and the soil block can be effectively sheared by the two shearing portions, and the sheared soil block Is configured to easily fall downward.

In the hopper of the soil improvement machine according to the invention 3 , in the hopper of the invention 1 or 2 , the interval between the pair of upper shearing portions is 125% or more and 145% or less of the interval between the pair of lower shearing portions.

  As described above, when the difference between the distance between the pair of upper shear portions (shear width) and the distance between the pair of lower shear portions (shear width) is too small, the effect of providing two shear portions is not expected. Can not. On the other hand, if the difference is too large, that is, if (a) the shear width of the lower shearing portion is too small or (b) the shear width of the upper shearing portion is too large, the following problems occur. To do.

  First, (a) reducing the shear width of the lower shearing portion is not preferable because the width of the introduction portion is reduced, and the soil block easily clogs at this introduction portion. In the case of (b), since there is a certain restriction on the height dimension of the second inclined part, if the shear width of the upper shearing part is widened within the certain restricted height dimension, the second inclination angle As described above, it is not preferable because the soil block hardly falls downward along the second inclined portion as described above.

  Therefore, in the present invention, the interval between the pair of upper shear portions is set to 125% or more and 145% or less of the interval between the pair of lower shear portions.

A hopper for a soil improvement machine according to a fourth aspect of the present invention is the hopper according to any one of the first to third aspects, wherein the pair of lower frames of the introduction portion are arranged in parallel to each other.

  In this case, since the upper end part (introduction port) and the lower end part (discharge port) of the introduction part have the same width, the sheared soil can be smoothly supplied downward.

The hopper of the soil improvement machine according to the invention 5 is provided in a soil improvement machine that improves the soil quality by mixing the soil and the soil improvement agent, and when the soil is introduced, the introduced soil is transferred to a lower conveyor belt conveyor. A hopper for guiding, which includes a hopper body and an introduction portion. The hopper body includes a pair of inclined frame bodies that open to open upward, and each of the pair of inclined frame bodies has at least one upper bent edge portion so that the upper side is opened more than the lower side. Have The introduction part is formed to extend downward from the lower ends of the pair of inclined frame bodies, and includes a pair of lower frame bodies for guiding the soil charged into the inclined frame bodies to the conveyor belt conveyor. A connecting portion between the frame body and the pair of inclined frame bodies is a lower bent edge portion. The length from the upper bent edge portion to the upper end of the hopper body is longer than the length from the lower bent edge portion to the upper bent edge portion.

  In this hopper, soil as raw soil is put into the hopper body from a hydraulic excavator or the like. The soil thrown into the hopper body is guided downward along the pair of inclined frame bodies, and is further supplied to the lower conveyor belt via the introduction portion.

  At this time, when highly viscous clay is introduced into the hopper from the bucket of the hydraulic excavator, the conventional hopper accumulates the soil block with difficulty in collapsing, and clogging or bridging may occur. However, in the present invention, first, the soil block is sheared at the bent edge portion formed on the inclined frame. The lump that remains without being sheared at the bent edge portion of the inclined frame body is pushed downward from above by the next lump, and at this time, the bent edge of the connecting portion between the inclined frame body and the lower frame body Sheared at the part.

  For this reason, in the hopper of this invention, compared with the conventional hopper, a lump is easy to collapse, and an appropriate amount of raw material soil can be continuously supplied to the conveyor belt conveyor.

The hopper of the soil improvement machine according to the invention 6 is provided in a soil improvement machine that improves the soil quality by mixing the soil and the soil improvement agent, and when the soil is introduced, the introduced soil is transferred to a lower conveyor belt conveyor. A hopper for guiding, which includes a hopper body and an introduction portion. The hopper body includes a pair of inclined frame bodies that open to open upward, and each of the pair of inclined frame bodies has at least one upper bent edge portion so that the upper side is opened more than the lower side. Have Introduction portion is formed extending from the lower end of the inclined frame member of the pair downward, viewing including the lower frame body a pair for guiding the inserted soil hopper body transfer belt conveyor, a pair bottom of A connecting portion between the frame body and the pair of inclined frame bodies is a lower bent edge portion . And the space | interval of the bending edge part formed in a pair of inclination frame body is wider than the space | interval of a pair of lower frame body. In addition, the length from the upper bent edge portion to the upper end of the hopper body is longer than the length from the lower bent edge portion to the upper bent edge portion.

  Here, when soil as raw material soil is thrown into the hopper body from a hydraulic excavator or the like, the soil thrown into the hopper body is guided downward along a pair of inclined frame bodies, and further through an introduction portion. It is supplied to the lower conveyor belt conveyor.

  At this time, when highly viscous clay is introduced into the hopper from the bucket of the hydraulic excavator, the conventional hopper accumulates the soil block with difficulty in collapsing, and clogging or bridging may occur. However, in the present invention, the earth lump is sheared at the bent edge portion formed in the inclined frame body, and further, the earth lump is sheared at the portion from the hopper body to the introduction portion. At this time, since the bent edge portion is provided on the hopper main body side, the clot can be sheared with a wider width than that of the conventional hopper, and cross-linking is less likely to occur than in the conventional case.

The transport device of the soil improvement machine according to the invention 7 is provided in a soil improvement machine that improves the soil quality by mixing the soil and the soil improvement agent, and transports the input soil to the mixer with the soil improvement material. It is an apparatus, Comprising: The hopper in any one of invention 1-6 , The belt conveyor for conveyance for conveying the soil which fell from the hopper to a mixer, and a fixed_quantity | feed_rate supply means are provided. The fixed amount supply means is disposed above the conveyance path by the conveyance belt conveyor at a predetermined interval from the conveyance belt conveyor, and regulates the conveyance amount to the downstream side of the conveyed soil.

  Here, according to the present applicant's research and experiment, it has been found that in the soil improvement machine, the larger the gap (introduction width) between the introduction portions of the hopper into which the soil is introduced, the easier it is to break up the soil mass. However, in general, the transport device of the soil improvement machine is provided with a quantitative supply means for quantitatively supplying the soil to the mixer, and this quantitative supply means regulates the amount of soil transport. Therefore, even in the hopper provided on the upstream side of the fixed amount supply means, the amount of supplied soil is naturally limited, and there is a limit in widening the introduction width of the hopper. And since there is a limit in this introduction width, as a result, it becomes easy to bridge | crosslink a clot at the upper end part of an introduction part.

Therefore, in the present invention, the hopper according to any one of the above-described inventions 1 to 6 is installed so that the hopper is less likely to be cross-linked by soil blocks without affecting the other configurations.

The transport device of the soil improvement machine according to the invention 8 is the device of the invention 7 , wherein the quantitative supply means is rotatably disposed above the transport belt conveyor, and a plurality of units for scraping the soil by rotation and transporting it to the downstream side. This is a scraping rotor in which the protruding member is provided on the outer periphery.

  Here, the conveyance amount to the downstream side of the soil is regulated by a scraping rotor that scrapes the soil conveyed by the conveyor belt conveyor. Therefore, the configuration is simplified as compared with the case where a regulating plate such as a plate is provided on the downstream side of the rotor.

A soil improvement machine according to a ninth aspect of the invention is to improve the soil quality by mixing soil and a soil improvement agent. The transport device of the seventh or eighth aspect , a improver hopper, a mixer, a discharge belt conveyor, It is equipped with. The improver hopper supplies a soil quality improver that mixes with the soil conveyed by the conveyor belt conveyor. A mixer is arrange | positioned in the downstream of the conveyor belt for conveyance, and mixes soil and the soil quality improvement agent from a modifier hopper. The discharge belt conveyor discharges the soil and the soil conditioner mixed by the mixer to the outside of the machine.

  In this soil conditioner, soil as raw soil is introduced into a hopper body from a hydraulic excavator or the like. The soil thrown into the hopper body is guided downward along the pair of inclined frame bodies, and is further supplied to the lower conveyor belt via the introduction portion. Thereafter, the soil and the soil conditioner are mixed by the mixer, and the soil whose soil has been improved is discharged out of the machine by the discharge belt conveyor.

  Also with this soil quality improvement machine, as described above, the lump is easily broken in the hopper, and an appropriate amount of raw material soil can be continuously supplied to the conveyor belt conveyor.

  As described above, in the present invention, clogging and cross-linking can be made difficult to occur in the hopper into which the raw soil is charged. Moreover, in this invention, raw material soil can be appropriately supplied to the downstream conveyor belt conveyor, without affecting other structures.

[overall structure]
FIG. 3 shows a self-propelled soil improvement machine according to an embodiment of the present invention. In FIG. 3, a part is shown in cross section. This self-propelled soil improvement machine has a crawler-type lower traveling body 1 that can be traveled by a traveling motor or the like, and a vehicle body 2 disposed on the upper portion of the lower traveling body 1.

  On one side of the vehicle body 2, a transport device 3 for transporting the raw soil is disposed. Further, in the center portion of the vehicle body 2, an improver supply unit 4 for supplying a soil improver and a mixer 5 for mixing the raw soil and the soil improver are arranged. Further, on the other side of the vehicle body 2, a driving device 6 and a discharge belt conveyor 7 for discharging the mixed raw material soil and soil improver to the outside of the machine are arranged.

[Conveyor]
The conveying device 3 is disposed substantially above the center of the conveying direction of the conveying belt conveyor 11 and the conveying belt conveyor 11 disposed below the conveying soil conveyor 10. A scraping rotor 12.

<Raw material hopper>
As shown in FIGS. 4 and 5, the raw soil hopper 10 has a shape that opens upward, and is formed so as to extend in the soil transport direction (the left-right direction in FIG. 1). The raw soil hopper 10 includes a pair of hopper main bodies 16 including a pair of inclined frame bodies 15 that open to open upward, and a pair formed downwardly extending from lower ends of the pair of inclined bodies 15. And an introduction portion 18 including the lower frame body 17. In addition, connecting portions 19 that connect the pair of inclined frame bodies 15 are provided at the upper portions of both ends of the hopper body 16 in the transport direction.

  Since the pair of inclined frame bodies 15 are formed symmetrically, only one inclined frame body (right side in FIG. 5) will be described here. The inclined frame body 15 is provided between a first inclined portion 15a inclined at a first inclination angle θ1 with respect to a horizontal plane, and between the first inclined portion 15a and the lower frame body 17, and has a first inclined angle with respect to the horizontal plane. and a second inclined portion 15b inclined at a second inclination angle θ2 larger than θ1. In other words, the inclined frame body 15 is bent halfway so that the upper side opens more outward than the lower side. The bent portion is sharply bent and formed into an edge shape, which forms an upper bent edge portion (upper shear portion) 20a. Therefore, when a lump is put into the raw soil hopper 10 from a bucket of a hydraulic excavator, the upper bent edge portion 20a shears and breaks the lump.

  The pair of lower frame bodies 17 extend vertically downward from the lower end of the second inclined portion 15b and are formed in parallel to each other. The pair of lower frames 17 guides the soil falling along the hopper body 16 to the lower conveyor belt conveyor 11. And the boundary part of the 2nd inclination part 15b and this lower frame 17 is bent sharply similarly to the upper bending edge part 20a, and is formed in the edge shape, and becomes the lower bending edge part (lower shearing part) 20b. ing.

  As described above, in the raw soil hopper 10, the bent edge portions 20a and 20b, that is, the shearing portions for shearing the soil mass are provided at the upper and lower portions, and the soil mass is easily broken compared to the conventional hopper. Clogging and cross-linking are less likely to occur.

<Specific dimensions of each part>
Here, with reference to FIG. 5, an example of the dimension of each part of the raw earth hopper 10 is given below.

  First, the maximum opening width W3 of the hopper body 16 is 2400 mm, and the width W1 of the introduction port of the introduction part 18 is 600 mm. Under the above conditions, as a result of performing a simulation in the case where 5 cups of raw soil (a lump) are put into the raw soil hopper 10 in a predetermined bucket, if the following dimensional values are adopted, clogging and bridging will occur. It turned out to be difficult to happen. Note that the width of the bucket (corresponding to the width of the clod) is wider than the width W1 of the inlet.

Width (input width) W2 of the upper bent edge portion 20a: 750 mm
First tilt angle θ1: 17 °
Height of second inclined part H1: 200 to 300 mm
(Second inclination angle θ2: 70 °)
From the above, the general shape of the raw soil hopper 10 in which cross-linking is difficult to occur is as follows.

  (a) The width W2 of the pair of upper bent edge portions is preferably 125% to 145% of the width of the pair of lower bent edge portions (= introduction width) W1.

  If the width W2 of the upper bent edge portion 20a exceeds 145% compared to the width W1 of the lower bent edge portion 20b, the soil mass sheared by the upper bent edge portion 20a is also sheared by the lower bent edge portion 20b. It is difficult to cause clogging and crosslinking. Conversely, if the width W2 of the upper bent edge portion 20a is too narrow to be smaller than 125% compared to the width W1 of the lower bent edge portion 20b, the effect of providing two bent edge portions at the top and bottom is small. The clot is less likely to collapse, and clogging and cross-linking are likely to occur.

  (b) The second inclination angle θ2 of the second inclined portion 15b is preferably 60 ° or greater and 75 ° or less.

  This angle range exceeds 45 ° which is the maximum angle of repose of soil. When the second inclination angle exceeds 75 °, as described above, the difference between the width W2 of the upper bent edge portion 20a and the width W1 of the lower bent edge portion 20b becomes small, and two bent edge portions are provided on the upper and lower sides. The effect is small and the clumps are less likely to collapse and clogging and cross-linking are likely to occur. On the other hand, when the second inclination angle θ2 is smaller than 60 °, the inclination of the second inclined portion 15b becomes too loose, and the earth lump does not easily fall down along the second inclined portion 15b. Soil accumulates at 15b.

<Conveyor belt conveyor>
The conveyor belt conveyor 11 circulates between two rollers and constitutes a conveyor path from the lower side of the raw soil hopper 10 to the mixer 5 through the lower part of the improver supply unit 4. ing. The conveyor belt conveyor 11 is made of iron.

<Scraping rotor>
As described above, the scraping rotor 12 is disposed substantially above the center of the transport belt conveyor 11 in the transport direction, and this position corresponds to the downstream end of the raw soil hopper 10 in the transport direction. The scraping rotor 12 is disposed above the transport belt conveyor 11 with a predetermined distance from the transport belt conveyor 11.

  The scraping rotor 12 is provided with a plurality of protruding members on the outer periphery, and can be rotated by hydraulic drive. The scraping rotor 12 facilitates the conveyance of the soil when, for example, soil with a lot of moisture slips on the belt. The scraping rotor 12 also functions as a quantitative supply means that regulates the transport amount of the soil that has been transported to the downstream side.

[Improvement agent supply unit]
The improver supply unit 4 is disposed above the end of the transport belt conveyor 11 on the downstream side in the transport direction. The improver supply unit 4 includes an improver hopper 25 in which a soil improver is stored, and an improver feeder 26 provided at the bottom of the improver hopper 25.

  The improver hopper 25 is formed in a funnel shape on the lower side, and guides the stored soil improver to the improver feeder 26 portion. Although the details of the configuration of the improver feeder 26 are omitted, the soil improver in the improver hopper 25 is supplied onto the conveyor belt conveyor 11 while appropriately adjusting the supply amount.

[Mixer]
The mixer 5 is an apparatus for crushing or mixing the lump of soil that has been conveyed by the conveyor belt conveyor 11. The mixer 5 includes a cutter 28 disposed so as to be closest to the conveyor belt conveyor 11 at the uppermost position, and three rotary hammers 29 disposed below the cutter 28.

[Driver]
The drive device 6 includes an engine, a radiator, an air cleaner, a hydraulic pump driven by the engine, and the like. Further, around the drive device 6, there are disposed a fuel tank, a hydraulic oil tank, operation members for operating the lower traveling body 1 and operating each device, and the like.

[Discharge belt conveyor]
The discharge belt conveyor 7 is a hydraulically driven device and extends obliquely upward from below the mixer 5. The discharge belt conveyor 7 receives the soil whose soil quality has been dropped after passing through the mixer 5, and discharges the soil outside the apparatus.

[Operation]
Next, soil improvement work will be described. As shown in FIG. 3, a hydraulic excavator having a bucket is generally provided on the raw soil hopper 10 side of the self-propelled soil conditioner, and a dumping end is disposed on the discharge end side of the discharge belt conveyor 7. Trucks are waiting. Here, the case where the raw material soil to be improved in soil quality is a highly viscous soil will be described.

  First, the soil excavated by the bucket of the hydraulic excavator is put into the raw soil hopper 10. At this time, the cohesive soil is dropped into the raw soil hopper 10 as a lump of the shape of the bucket. The lump dropped into the raw soil hopper 10 collides with the upper bent edge portion 20a of the hopper body 16, and is sheared at this portion, so that a part of the lump is broken. A part of the collapsed clot and the remaining clot move downward along the inclination of the second inclined portion 15b.

  When the next soil block is dropped into the raw material soil hopper 10 from the bucket, the previous soil block is pushed further downward by the soil block. Then, the soil mass pushed downward collides with the lower bent edge portion 20b having a smaller shear width than the upper bent edge portion 20a, and is further finely sheared at this portion. Further, the upper (second) mass is sheared by the upper bent edge portion 20a in the same manner as the previous mass.

  The operation as described above is repeated, and the thrown-in mass is subjected to shear twice by the upper bent edge portion 20a and the lower bent edge portion 20b. Therefore, clogging that has occurred in the conventional hopper and cross-linking in the vicinity of the upper end of the introduction portion are less likely to occur, and the raw material soil is continuously sent to the conveyor belt conveyor 11 side.

  Next, the raw material soil that has fallen from the raw material soil hopper 10 is conveyed to the mixer 5 side by the conveying belt conveyor 11. At this time, the material soil to be transported is scraped downstream by the scraping rotor 12 and the transport amount is regulated. Therefore, a fixed amount of raw material soil is always supplied to the downstream side of the scraping rotor 12.

  In addition, a soil conditioner is supplied at the downstream end of the conveyor belt conveyor 11. At this time, the supply amount is adjusted by the improver feeder 26, and the soil condition improver is mixed at a predetermined ratio with respect to the raw material soil.

  Furthermore, the raw material soil and the soil condition improver conveyed by the conveyor belt conveyor 11 are crushed and mixed by the mixer 5 to be improved into reusable soil. The improved soil falls on the discharge belt conveyor 7 and is then discharged out of the machine by the discharge belt conveyor 7 and mounted on a dump truck or the like.

[Feature]
This embodiment as described above has the following features.

  Since the inclined frame body 15 constituting the hopper body 16 is bent halfway to form the upper bent edge portion 20a, it is aligned with the lower bent edge portion 20b formed at the boundary portion between the hopper body 16 and the introduction portion 18. The soil block can be sheared at a total of two locations. Therefore, the clot is easily broken and clogging and crosslinking at the upper part of the introduction part 18 are unlikely to occur.

  Further, since the upper bent edge portion 20a capable of shearing the earth block is provided on the inclined frame body 15, the width of the shearing portion can be set without being influenced by the shape and size of the introduction portion 17. That is, the shape and dimensions of the introduction portion 17 are limited by the configuration of the conveyor belt conveyor 11 and the scraping rotor 12, but the upper bent edge portion 20a formed on the inclined frame body 15 is not subject to those limitations. A wider shear width, which is the interval between the upper bent edge portions 20a, can be secured, and the mass can be effectively broken by the upper bent edge portion 20a having a wider shear width. Conversely, since the hopper can be improved without changing the shape of the introduction portion 17 and the like, the introduction port of the introduction portion 17 can be set to an appropriate width. Therefore, the soil is evenly placed on the conveyor belt conveyor 11 and the quantitative supply performance is not impaired.

  Since the upper bent edge portion 20a can be formed by further bending a part of the inclined frame body forming the conventional hopper body outward, the manufacturing cost is particularly increased as compared with the conventional hopper. Can be realized.

  In the present embodiment, the shear width W2 of the upper bent edge portion 20a is 750 mm, which is 125% of the shear width W1 (600 mm) of the lower bent edge portion 20b. In addition, the soil mass sheared by the upper bent edge portion 20a can be smoothly guided downward.

  In addition, since the second inclination angle of the second inclined portion 15b of the hopper body 16 is set to 70 °, which is larger than the maximum repose angle of the soil, similarly to the above, it is possible to effectively shear the soil mass at the two shearing portions. In addition, the soil block sheared by the upper bent edge portion 20a can be smoothly guided downward.

[Other Embodiments]
(a) The shape and size of each part of the raw soil hopper 10 in the above embodiment are examples, and the present invention is not limited to these shape and size.

  (b) The left and right inclined frame bodies 15 and the lower frame body 17 constituting the hopper main body 16 and the introduction portion 18 may be formed by bending one plate member, respectively, or connecting other members by welding. May be formed.

  (c) In the above-described embodiment, one upper bent edge portion 20a is formed on the inclined frame body 15. However, two or more upper bent edge portions may be formed. However, in this case, it is necessary to increase the interval (shear width) toward the upper bent edge portion.

  (d) In the above embodiment, an example in which the present invention is applied to a self-propelled soil improvement machine has been described. However, the present invention can also be applied to other soil improvement machines.

Sectional drawing of the conventional raw material soil hopper. The schematic diagram for demonstrating the problem of the conventional raw material soil hopper. The whole side view of the self-propelled soil improvement machine by one embodiment of the present invention. The external appearance perspective view of the raw material soil hopper of the said soil quality improvement machine. The cross-sectional schematic diagram of the said raw material soil hopper.

3 Conveying device 4 Improving agent supply unit 5 Mixer 7 Discharge belt conveyor 10 Raw material soil hopper 11 Conveying belt conveyor 12 Scraping rotor 15 Inclined frame body 15a First inclined portion 15b Second inclined portion 16 Hopper body 17 Lower frame body 18 Introduction Part 20a upper bending edge part (upper shearing part)
20b Lower bent edge part (lower shear part)

Claims (9)

A hopper that is provided in a soil improvement machine that improves soil quality by mixing soil and soil improvement agent, and that introduces soil into the lower conveyor belt conveyor,
A hopper body including a pair of inclined frame bodies that open to open upward;
An introduction part that includes a pair of lower frames that are formed extending downward from the lower ends of the pair of inclined frames and that guide the soil introduced into the inclined frames to the conveyor belt conveyor;
A pair of lower shearing portions for forming a shearing force against a charged soil mass, comprising a bent edge portion formed at a boundary between the pair of inclined frame bodies and the pair of lower frame bodies; ,
A pair of upper shearing portions provided above the pair of lower shearing portions at a wider interval than the pair of lower shearing portions, and for applying a shearing force to the input soil mass;
With
The pair of inclined frame bodies of the hopper main body are provided between a first inclined portion inclined at a first inclination angle with respect to a horizontal plane, and between the first inclined portion and the lower frame body, with respect to the horizontal plane. A second inclined portion that is inclined at a second inclination angle larger than the first inclination angle,
The pair of upper shearing portions includes a bent edge portion formed at a boundary portion between the first inclined portion and the second inclined portion,
The vertical length of the first inclined portion is longer than the vertical length of the second inclined portion.
Soil improvement machine hopper. The soil improvement machine hopper according to claim 1 , wherein a second inclination angle of the second inclined portion is not less than 60 ° and not more than 75 °. The soil improvement machine hopper according to claim 1 or 2 , wherein an interval between the pair of upper shearing portions is 125% or more and 145% or less of an interval between the pair of lower shearing portions. The soil improvement machine hopper according to any one of claims 1 to 3 , wherein the pair of lower frames of the introduction portion are arranged in parallel to each other. A hopper that is provided in a soil improvement machine that improves soil quality by mixing soil and soil improvement agent, and that introduces soil into the lower conveyor belt conveyor,
A pair of inclined frame bodies that open to open upward, and each of the pair of inclined frame bodies has at least one upper bent edge portion so that the upper side is more open than the lower side. The hopper body,
A pair of lower frames that extend downward from the lower ends of the pair of inclined frame bodies and guide the soil put into the inclined frame bodies to the conveyor belt conveyor; An introduction portion in which a connecting portion between the frame body and the pair of inclined frame bodies is a lower bent edge portion;
Equipped with a,
The length from the upper bent edge to the upper end of the hopper body is longer than the length from the lower bent edge to the upper bent edge.
Soil improvement machine hopper. A hopper that is provided in a soil improvement machine that improves soil quality by mixing soil and soil improvement agent, and that introduces soil into the lower conveyor belt conveyor,
A pair of inclined frame bodies that open to open upward, and each of the pair of inclined frame bodies has at least one upper bent edge portion so that the upper side is more open than the lower side. The hopper body,
The formed from the lower end of a pair of inclined frame member extends downwardly, the saw including a bottom frame member of the pair for guiding the soils placed in a hopper body to the transfer belt conveyor, the bottom of the pair An introduction portion in which a connecting portion between the frame body and the pair of inclined frame bodies is a lower bent edge portion ;
With
Intervals on the bent edge portion formed on the inclined frame member of the pair is widely than the spacing of the lower frame of the pair,
The length from the upper bent edge to the upper end of the hopper body is longer than the length from the lower bent edge to the upper bent edge.
Soil improvement machine hopper. It is provided in a soil improvement machine that improves soil quality by mixing soil and soil improvement agent, and is a transport device for transporting the input soil to a mixer with soil improvement material,
The hopper according to any one of claims 1 to 6 ,
A conveyor belt for transporting the soil falling from the hopper to the mixer;
Above the transport path by the transport belt conveyor, a fixed amount supply means that is disposed at a predetermined interval from the transport belt conveyor and regulates the transport amount to the downstream side of the soil that has been transported,
Conveyor for soil improvement machine equipped with The fixed quantity supply means is a scraping rotor that is rotatably disposed above the conveyor belt conveyor and is provided with a plurality of projecting members provided on the outer periphery for scraping the soil by rotation and transporting it to the downstream side. The transfer device of the soil improvement machine according to 7 . A soil improvement machine that improves soil quality by mixing soil and soil improvement agent,
A transport device according to claim 7 or 8 ,
An improver hopper for supplying a soil conditioner to be mixed with the soil conveyed by the conveyor belt;
A mixer that is disposed on the downstream side of the conveyor belt for conveyance, and mixes the soil and the soil condition improver from the improver hopper;
A discharge belt conveyor for discharging the soil and the soil conditioner mixed by the mixer out of the machine;
Soil improvement machine equipped with.

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