JP3597170B2 - Self-propelled soil improvement machine and sieve device used therefor - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a self-propelled soil improvement machine for improving received soil by mixing it with a soil improving material, and more particularly, to a self-propelled soil improvement for selecting and improving received soil and sand having a predetermined particle size or less. The present invention relates to a sifter and a sieve device used for the same.
[0002]
[Prior art]
In recent years, under the background of the promotion of waste reuse, such as the enforcement of the so-called Recycling Law (October 1991), this has occurred in, for example, burial work for gas pipes, water and sewage works, and other road works and foundation works. There is a growing need for self-propelled soil improvement machines that mix construction-generated soil with soil improvement materials and use it as an improved soil for recycling.
[0003]
As such a self-propelled soil improvement machine, for example, as described in Japanese Patent No. 2867235, a soil improvement material is supplied from a tank for storing the soil improvement material to a soil which is put into a hopper and transported by a transport conveyor. Then, a mixture of the earth and sand and the soil improvement material is mixed by a mixing device to produce an improved soil, and the improved soil is carried out by a carry-out conveyor.
In this prior art, a lattice-shaped sieve is provided on the upper part of the hopper so that foreign substances such as large stones do not enter the hopper.
[0004]
[Problems to be solved by the invention]
However, the following problems exist in the above conventional technology.
That is, under the background of the above-mentioned recent promotion of waste recycling, the properties of the earth and sand to be reformed have become extremely diverse. For example, soil properties such as earth and sand mixed with foreign matter such as large stones, and cohesive soil having a very small particle size and a relatively high water content, and soil and soil mixed with a large amount of compacted soil obtained by compressing the clay and the like. Are included so as to greatly differ from each other.
[0005]
In the above-mentioned conventional technology, for example, when the above-mentioned cohesive soil or the like is used as the soil to be reformed, the soil mass contained therein fits into the eyes of the above-mentioned sieve lattice, or the cohesive soil having an extremely small particle size is formed in the lattice. In some cases, the sieves may be deposited at the intersections of the eyes and adhere to and grow from the bases, thereby reducing the opening area of the sieve. In such a case, there is a possibility that an appropriate sediment sorting function cannot be exhibited, for example, the earth and sand that should be originally introduced into the lower hopper as the earth to be reformed is removed without passing through the sieve.
[0006]
The present invention has been made on the basis of the above-described matter, and an object of the present invention is to use a self-propelled soil improvement machine capable of appropriately selecting the input target soil for improvement in accordance with its particle size, and using the same. It is to provide a sieve device.
[0016]
[Means for Solving the Problems]
(1In order to achieve the above object, the present invention also provides a self-propelled soil improvement machine for modifying soil and sand, comprising: a main body frame provided with a traveling means; a mixing device provided on the main body frame; A conveyor provided on one side in the longitudinal direction of the main body frame, the other side facing the mixing device, a hopper for receiving earth and sand provided above one end of the conveyor, and the other end of the conveyor A tank for storing the soil improving material disposed so that the supply unit is located above the side, and the tank extending from the lower position of the mixing device to an outer position on the other longitudinal side of the main body frame. A discharge conveyor provided on the main body frame, a sieve device main body oscillatingly provided above the hopper for receiving earth and sand, and a mesh-like structure provided in the main body of the sieve device and constituted by a plurality of rod-shaped members. Comprising the lattice member and the sieve device having a plurality of projecting portions provided respectively at the intersection the top of the grid member so as to facilitate cutting a clod contained in sediment to be introduced.
[0017]
In the present invention, a lattice member for sorting the received earth and sand according to the particle size is configured in a mesh shape by a plurality of rod-shaped members,In order to make it easier to cut the earth mass contained inThis mesheachAt the intersection,MultipleWith the provision, for example, even when the clay soil or the like is used as the soil to be reformed, a decrease in the opening area of the lattice member can be suppressed.
[0018]
That is, the provision of the protruding portion can prevent the clay soil from accumulating on the intersection of the meshes of the lattice member, and can suppress the adhesion growth of the clay soil. Moreover, when thrown, the earth mass contained in the cohesive soil is broken to a required particle size by the cut of the protruding portion, and passes through the lattice member without being fitted into the mesh.
[0019]
Therefore, it is possible to prevent a decrease in the opening area of the sieve, and to prevent the earth and sand originally to be introduced as the target earth for reforming from being removed without passing through the sieve, and to be charged. The soil to be reformed can be appropriately sorted according to the particle size.
[0021]
(2In order to achieve the above object, the present invention relates to a self-propelled soil improvement device provided in a self-propelled soil improvement device for modifying soil, wherein a vibrating device is provided above a hopper for receiving soil and soil. A sieve device main body provided so as to be provided, a grid member provided in the main body of the sieve device and configured in a mesh shape by a plurality of rod-shaped members, and the grid member so as to easily cut the earth mass contained in the earth and sand to be charged. And a plurality of protruding portions respectively provided at the upper portion of the intersection.
[0022]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of a self-propelled soil improvement machine of the present invention will be described with reference to the drawings.
FIG. 1 is a side view showing the overall structure of one embodiment of a self-propelled soil conditioner of the present invention, and FIG. 2 is a top view thereof.
1 and 2, reference numeral 1 denotes a traveling body. The traveling body 1 includes a track frame 2, a driven wheel (idler) 3 provided on one side (the left side in FIG. 1) of the track frame 2, and a truck. It is composed of a drive wheel 4 provided on the other side (the right side in FIG. 1) of the frame 2, a drive device 5 provided on the drive wheel 4 side, and a crawler belt 6 wrapped around the driven wheel 3 and the drive wheel 4. ing.
[0023]
Reference numeral 7 denotes a main body frame that extends in the front-rear direction of the self-propelled soil improvement machine and is made of, for example, square steel, and is provided above the track frame 2. Reference numeral 8 denotes a sieve device for receiving the soil to be reformed, which is fed by a hydraulic excavator, for example. 10 and a grid member 11 provided in the main body 10 of the sieve to sort the received earth and sand according to the particle size. The lattice member 11 is disposed such that one side (left side in FIG. 1) in the longitudinal direction of the main body 10 is lower than the other side (right side in FIG. 1) in the longitudinal direction of the main body 10. I have.
[0024]
FIG. 3 is a perspective view illustrating a detailed structure of the sieve device 8.
In FIG. 3, reference numeral 12 denotes a driving device which is constituted by, for example, a hydraulic motor and vibrates the sieve device 8, and 13 denotes an output shaft of the driving device 12, and a pulley 14 is fixed to a tip of the output shaft 13. I have. Reference numeral 15 denotes a rotating shaft rotatably supported by the sieve device main body 10, and 16 denotes a pulley fixed to one side of the rotating shaft 15, and a drive is provided between the pulley 16 and the pulley 14 of the driving device 12. A belt 17 for transmitting power is stretched around.
[0025]
Numerals 18 and 18 denote rotating drums attached to both ends of the rotating shaft 15 whose center of gravity is located at a predetermined distance from the rotating shaft 15 (even if the rotating drum 18 is mounted eccentrically to the rotating shaft 15). Good), and the sieve device main body 10 is caused to vibrate by rotating together with the rotating shaft 15. In addition, this vibration structure may be a structure in which the driving device 12 is directly connected to the rotating shaft 15 without using the belt 17. Reference numeral 19 denotes a support member fixed to the outer wall surface of the sieving apparatus main body 10. The support member 19 supports the sieving apparatus main body 10 on the main body frame 7 (see FIG. 1) via the spring 9 (see FIG. 1). ing.
[0026]
FIGS. 4A and 4B both show the structure of the lattice member 11 described above, as viewed from the directions of arrows IVa and IVb in FIG. 3, respectively.
As shown in FIGS. 4A and 4B and FIG. 3 described above, the grid member 11 includes a grid upper step 11a and a grid lower step 11b. The lower grid portion 11b is provided in the main body 10 of the sieve device, and is formed by arranging a plurality of bar-shaped members 20b formed of, for example, flat bars in a substantially parallel manner. Further, each bar-shaped member 20b extends in one direction (in this example, the short direction of the main body frame 7, that is, the left-right direction in FIG. 4A and the up-down direction in FIG. 2).
[0027]
The upper grid portion 11a is provided above the lower grid portion 11b such that the upper surface is located above the lower grid portion 11b. Also, a plurality of bar-shaped members 20a having substantially the same shape as the bar-shaped members 20b are arranged substantially in parallel. It was established. Each rod-shaped member 20a extends in a direction perpendicular to the extending direction of the rod-shaped member 20b (in this example, the longitudinal direction of the main body frame 7, in other words, the moving direction of the soil component removed by the grid member 11, ie, the vertical direction in FIG. Direction (left-right direction in FIG. 2). The rod-shaped members 20a and 20b both have a vertical dimension H (vertical dimension in FIG. 4B) and a horizontal dimension d (the rod-shaped member 20a has a horizontal dimension in FIG. 4 (a) is relatively small, and is arranged with substantially the same dimension W between members.
[0028]
Returning to FIGS. 1 and 2, reference numeral 21 denotes a lower-diameter frame-shaped hopper, which receives the earth and sand selected by the sieving device 8 and draws out the soil downward. It is supported so as to be located below. Reference numeral 22 denotes a conveyor, which conveys the earth and sand drawn out from the hopper 21 and supported by the main body frame 7. The hopper 21 is located above one end side (the left side in FIG. 1) of the conveyor 22. Reference numeral 23 denotes a tank for storing a soil improving material to be added to the earth and sand conveyed by the conveyor 22. The tank 23 has a substantially cylindrical box-shaped storage section 25 supported by a plurality of (for example, three) columns 24 erected near the center of the main body frame 7 in the longitudinal direction (horizontal direction in FIG. 1). A supply unit 26 (for example, a rotary feeder or the like) that is provided below the unit 25 and that adds the soil improving material in the storage unit 25 to the earth and sand conveyed by the conveyor 22. The supply unit 26 is located above the other end side (the right side in FIG. 1) of the transport conveyor 22.
[0029]
A mixing device 27 is supported near the center of the main body frame 7 in the longitudinal direction (the left-right direction in FIG. 1). This mixing device is configured to stir and mix the earth and sand and the soil improvement material introduced from the conveyor 22 by using a paddle mixer (not shown) provided therein, and to transfer the soil to the right side in FIG. 1 while improving the soil. Reference numeral 28 denotes a driving device for rotating the paddle mixer (not shown). Reference numeral 29 denotes a discharge conveyor for transporting and discharging the improved soil derived from the mixing device 27 to the outside of the self-propelled soil improvement machine (in this case, the right side in FIG. 1). The discharge conveyor 29 extends from a position below the mixing device 27 to an outer position on the other side in the longitudinal direction of the main body frame 7 (right side in FIG. 1), and is inclined upward toward the discharge side (right side in FIG. 1). It is supported by the main body frame 7 and the like.
[0030]
Reference numeral 30 denotes a power unit of the self-propelled soil improvement machine according to the present embodiment. The power unit 30 is supported via a support member 31 at the other longitudinal end (right side in FIG. 1) of the main body frame 7. I have. Although not particularly shown for the purpose of preventing complexity, the power unit 30 includes an engine, at least a hydraulic pump driven by the engine, and a plurality of controls for controlling hydraulic oil supplied from the hydraulic pump to each drive unit. Has a built-in valve.
[0031]
Next, the operation of the self-propelled soil conditioner of the present embodiment having the above configuration will be described.
For example, when earth and sand are put into the sieving device 8 of the self-propelled soil improvement machine by a hydraulic shovel or the like, the earth and sand that has passed through the grid member 11 of the sieving device 8 is introduced into the lower hopper 21. The earth and sand received by the hopper 21 is placed on the conveyor 22 below the earth and sand. During the transportation, the earth improving material is added from the supply part 26 of the tank 23 for the earth improving material and introduced into the mixing device 27. The earth and sand and the soil improving material introduced into the mixing device 27 are uniformly stirred and mixed by the paddle mixer in the mixing device 27, and are led out onto the discharge conveyor 29. Then, the improved soil is conveyed by the discharge conveyor 29 and finally discharged to the outside of the self-propelled soil improvement machine.
[0032]
Next, operations obtained by the present embodiment will be sequentially described.
(1) Ensuring appropriate particle size sorting function for the soil to be reformed
In the present embodiment, as described above, the grid member 11 is constituted by the upper grid portion 11a and the lower grid portion 11b. Can be suppressed from decreasing.
[0033]
Here, FIGS. 5A to 5C are diagrams schematically showing a state in which the earth mass contained in the earth and sand to be input passes through the lattice member 11 in the present embodiment. The function and effect of the present embodiment will be described with reference to FIGS.
First, in FIGS. 5A to 5C, S is a soil mass contained in the earth and sand fed into the sieving device 8, and is formed by compressing cohesive soil, for example. When viscous soil is injected by a hydraulic shovel or the like, the clay mass S contained therein is dropped on the bar-shaped member 20a constituting the upper grid portion 11a, and the impact at the time of collision causes the soil mass S in FIG. A groove-like cut is made in the hatched portion. Thereafter, the bar-shaped member 20a plays the role of a rail, and the soil mass S sequentially moves on the bar-shaped member 20a by vibrating the lattice member 11 using the cuts as guides. At this time, as shown in FIGS. 5B and 5C, the rod-shaped member 20a further cuts into the earth mass S as it moves on the rod-shaped member 20a, and at the same time, the impact applied by the vibration of the lattice member 11 is reduced. With the addition of the action, the earth mass S is broken at the cut portion, and is primarily cut into a width of approximately the inter-member dimension W of the rod-shaped member 20a.
[0034]
The primary cut earth mass S passes through the upper grid portion 11a and collides with the lower vibrating grid lower portion 11b, and is secondarily cut to a length of approximately the dimension W between the members to obtain a desired grain size. To the lower hopper 21. Thereby, the injected clayey soil can be passed through the grid member 11 as the target soil for reforming without being deposited and adhered and grown on the intersections of the eyes of the grid member 11.
[0035]
Therefore, it is possible to prevent the opening area of the grid member 11 from being reduced, and to prevent the earth and sand originally to be introduced as the reforming target earth from being removed without passing through the grid member 11. In addition, it is possible to appropriately sort the supplied sediment-removal sand according to the particle size. Further, since the rod-shaped members 20a and 20b constituting the upper grid portion 11a and the lower grid portion 11b respectively have a relatively small horizontal dimension d with respect to the vertical dimension H, the surface pressure on the earth mass S is accordingly reduced. The height can be increased, and the above-described action of cutting and cutting into the earth mass S can be more effectively obtained.
[0036]
(2) Improvement of opening area of lattice member
In the present embodiment, the bar-shaped members 20a and 20b forming the upper grid portion 11a and the lower grid portion 11b are formed of members having a cross-sectional shape in which the horizontal dimension d is relatively smaller than the vertical dimension H. Therefore, a large opening area (opening ratio) of the grid member 11 can be ensured while securing a required strength enough to withstand collision with the injected earth and sand, and clogging of the grid member 11 is suppressed. be able to.
[0037]
(3) Cutting action of soil mass caused by vibration
For example, when earth and sand having a relatively high water content and viscosity are vibrated, the earth mass contained therein may grow. This is because, in soil with a relatively high water content, water is dispersed inside the soil and the lumps contained therein, and the water contained therein moves to the surface by being vibrated. This is because the earth and sand or the earth mass becomes wet on the surface. That is, when the surface is wet in this way, an adsorption force is generated between the individual earth and sand components or the earth mass, and they are adsorbed to each other and grow into an aggregated earth mass. As a result, a phenomenon has occurred in which sediment components and the like that were large enough to pass through the grid before being introduced are removed without passing through the grid.
[0038]
In the present embodiment, similarly to the above (1), the soil mass thus generated can be effectively primary and secondary cut, and relatively high water content and high viscosity soil are targeted for reforming. Even in such a case, an appropriate sorting function can be exhibited.
[0039]
(4) Improvement of sorting processing volume
In general, as a method of supplying the soil to be reformed to the sieve device, a method using a loading heavy machine such as a hydraulic shovel as described above and a method using a conveyor device such as a belt conveyor are considered. When the latter belt conveyor or the like is used, the earth and sand can be continuously supplied to the sieving apparatus at a substantially constant pace. In such a case, when sieving, if the driving speed or the like of the belt conveyor is adjusted so that the thickness of the earth and sand layer formed on the grid member temporarily becomes relatively thin, the belt is moved to the end of the grid member by vibration. By then, the supplied earth and sand can be roughly sorted. However, at the operation site of the self-propelled soil improvement machine, a sufficient space for installing stationary equipment such as a belt conveyor is not always ensured.
[0040]
On the other hand, in the case where the space is limited, or when the user frequently moves between small work sites, the earth and sand is charged by the above-described hydraulic shovel or the like. When excavating earth and sand with a hydraulic excavator, it is necessary to scoop up the earth and sand accumulated at a predetermined position using a so-called bucket and put it into a sieve device. It becomes. In this case, the thickness of the sediment layer temporarily formed on the lattice member becomes relatively thick, and the sediment input cannot be completely sorted out before moving to the end of the lattice member. As a result, the earth and sand to be introduced into the lower hopper may be discharged.
[0041]
In the present embodiment, as described in the above (1) and (2), the supplied earth and sand is reduced by the grid member cutting action and the sufficient opening area (opening ratio) in the grid member 11. , It is possible to secure a sufficient sorting amount even when the earth and sand are intermittently supplied as described above.
[0042]
Next, modified examples of the above-described embodiment of the present invention will be sequentially described with reference to the drawings.
FIGS. 6A and 6B are views showing a modification of the lattice member 11 provided in the embodiment, and correspond to FIGS. 4A and 4B, respectively. FIG.
As shown in FIGS. 6A and 6B, the lattice member 11A in this modification uses bar-shaped members 20Aa and 20Ab each having a cross-sectional shape whose upper surface is reduced in diameter upward. The upper lattice portion 11Aa and the lower lattice portion 11Ab are configured as in the embodiment. Further, in the present modification, the upper grid portion 11Aa and the lower grid portion 11Ab are partially fixed in the vertical direction and fixed. In detail, both are engaged so that the upper part of the lower bar-shaped member 20Ab may bite into the lower part of the upper bar-shaped member 20Aa by the dimension K. In other words, the upper surface of the upper grid portion 11Aa is located above the upper surface of the lower grid portion 11Ab by the dimension HK. Other configurations are the same as those of the embodiment.
[0043]
According to this modification, since the diameter of the upper side of the rod-shaped members 20Aa and 20Ab is reduced upward, the surface pressure on the earth mass can be further increased, and the same effect as that of the embodiment can be obtained. Clots can be cut more effectively. Further, since the upper lattice portion 11Aa and the lower lattice portion 11Ab are integrally provided in engagement with each other, the strength of the structure of the lattice member 11A can be improved.
[0044]
FIGS. 7A and 7B are views showing another modified example of the lattice member 11 provided in the above-described embodiment. FIGS. 4A and 4B respectively show the modified examples. It is a corresponding figure.
As shown in FIGS. 7A and 7B, a grid member 11B in the present modification uses hollow rod-shaped members 20Ba and 20Bb, respectively, and a grid upper step portion 11Ba as in the embodiment. And the lower lattice portion 11Bb. That is, the difference from the above-described embodiment is that the rod members 20Ba and 20Bb are formed of, for example, square pipes having a wall thickness t, and the relative relationship between the vertical dimension H and the horizontal dimension d. Other configurations such as the member-to-member dimension W and the like are substantially the same as those of the above-described embodiment.
[0045]
Here, as described in one embodiment, by reducing the horizontal dimension d of the rod-shaped members 20a and 20b, it is possible to more effectively obtain the cutting action and the aperture ratio of the earth mass in the lattice member 11. it can. As described above, when the horizontal dimension d of the rod-shaped members 20a and 20b is reduced in order to further improve the cutting action and the aperture ratio of the earth mass, the section modulus of the rod-shaped members 20a and 20b decreases. Therefore, in order to secure a desired strength, it is necessary to increase the vertical dimension H of the rod members 20a and 20b. However, in this case, since the weight of the rod-shaped members 20a and 20b (the weight of the grid member 11) increases, the vibration width (amplitude) of the sieving device 8 decreases with the same output, and the sieving performance is sufficiently high. It may not work. This can be dealt with by changing the eccentric balance (or weight) of the rotary drum 18 (see FIG. 3), and accordingly, the sieve device main body 10 (see FIG. 3) and the spring 9 supporting the same are changed. (See FIG. 1) must also have a robust structure to ensure sufficient strength, and the output of the drive device 12 (see FIG. 3) that vibrates the sieve device 8 must also be increased.
[0046]
On the other hand, in the present modification, the bar-shaped members 20Ba and 20Bb are formed of hollow members, so that the horizontal dimension d can be made smaller without increasing the weight of the lattice member 11B. Can be obtained more effectively. The maximum bending stress due to the impact load or pressure applied to the rod-shaped members 20Ba, 20Bb by the injected earth and sand acts on the outer peripheral portion of the cross-section of the rod-shaped members 20Ba, 20Bb. , The rod members 20Ba and 20Bb can secure desired strength.
[0047]
FIGS. 8A and 8B are views showing still another modified example of the lattice member 11 provided in the above-described embodiment, and FIGS. 4A and 4B respectively. FIG.
As shown in FIGS. 8 (a) and 8 (b), the lattice member 11C in this modified example is formed of a hollow member as in the modified examples described in FIGS. 7 (a) and 7 (b). It is configured using the rod-shaped members 20Ca and 20Cb. 7 (a) and 7 (b) is that, first, the inter-member dimension W 'of the bar-shaped member 20Cb in the lower grid portion 11Cb is changed between the bar-shaped members 20Ca in the upper grid portion 11Ca. The point is that it is provided wider (for example, about twice) than the dimension W. The second difference is that the thickness t 'of the bar-shaped member 11Cb constituting the lower grid portion 11Cb is set relatively larger than the thickness t of the upper grid portion 11Ca. Other configurations are the same as those of the modified example of FIGS. 7A and 7B.
[0048]
In this modification, since the inter-member dimension W ′ of the bar-shaped member 20Cb of the lower grid portion 11Cb is wide and the opening ratio of the grid member 11C is set large, clogging of the grid member 11C is less likely to occur. It is possible to obtain the same effects as those of the modified example shown in FIG. 7A and FIG. 7B and to improve the permeability of the injected earth and sand. Further, in the present modification, the number of the rod-shaped members 20Cb of the lower grid portion 11Cb is reduced, so that the load applied to one rod-shaped member 20Cb is increased. However, as described above, the thickness t ′ is increased. Therefore, the strength of the lower lattice portion 11Cb can be made sufficient.
[0049]
In order to obtain the strength of the lower grid portion 11Cb, it is conceivable to adjust the vertical dimension H 'of the rod-shaped member 20Cb in addition to the adjustment of the thickness t' of the rod-shaped member 20Cb. In the above description, the inter-member dimension W ′ of the bar-shaped member 20Cb is described as, for example, about twice as large as the inter-member dimension W of the bar-shaped member 20Ca of the upper lattice portion 11Ca, but the present invention is not limited to this, and the strength of the bar-shaped member 20Ca is sufficient. , The inter-member dimension W 'of the rod-shaped member 20Cb may be further increased. Furthermore, in this modification, the example in which the bar-shaped members 20Ca and 20Cb are formed of hollow members has been described. However, the characteristic of this modification in which the lower stage of the lattice is set wider than the upper stage is the above-described feature using a solid member. It is needless to say that the present invention can be applied to one embodiment and the modified examples of FIGS. 6A and 6B.
[0050]
FIG. 9 is a perspective view illustrating still another modified example of the lattice member 11 provided in the above-described embodiment.
As shown in FIG. 9, in the lattice member 11D of the present modification, a bar-shaped member 20Db constituting the lower grid portion 11Db is provided so as to penetrate below the bar-shaped member 20Da constituting the upper grid portion 11Da. The bar-shaped member 20Da constituting the upper step portion 11Da of the lattice is formed of a member having a substantially “U” -shaped cross section whose lower side is open, has a vertical dimension H and a horizontal dimension d, and is disposed with a member-to-member dimension W. ing. The bar-shaped member 20Db constituting the lower lattice portion 11Db is formed of a hollow member having a diameter d 'such as a pipe steel, for example, and is disposed with a member-to-member dimension W ". The above-described dimensions of the bar-shaped members 20Da and 20Db. It is needless to say that H, d, d 'and each thickness dimension may be set so that the lattice member 11D has a desired strength, and other configurations are the same as those of the above-described embodiment.
[0051]
As in the present modification, if there is a predetermined step between the upper grid portion 22Da and the lower grid portion 11Db (that is, if the upper surface of the upper grid portion is located above the lower grid portion), the grid Even when the lower part penetrates the upper part of the lattice, the same effect as in the embodiment can be obtained. Further, in this modification, the lattice member 11D is configured integrally with the lattice upper step 11Da and the lattice lower step 11Db, so that high structural strength can be ensured. In addition, this allows the use of the bar-shaped member 20Da whose lower side is opened as in the present modification (however, even if the upper and lower steps of the lattice member 11D do not engage with each other, they have sufficient dimensional strength. Needless to say, a rod-shaped member having such a shape may be used for the lower lattice portion 11Db.
[0052]
Further, in the lower grid portion 11Db which does not require the cutting action of the earth mass as much as the upper grid portion 11Da, the rod-shaped member 20Db constituting the lower grid portion 11Db is not necessarily a member whose vertical dimension is set to be larger than the horizontal dimension. Alternatively, a pipe having a substantially circular cross section, a square pipe having a substantially square shape, or the like as in this modification may be used. In short, it is only necessary that the cross section has a relatively small size in the horizontal direction and a sufficient strength. Further, the structure of the modification in which the lattice lower part 11Db penetrates the lattice upper part 11Da and the vertical and horizontal dimensions of the bar-shaped member 20Db of the lattice lower part 11Db are described in the first embodiment and FIG. It is needless to say that the present invention can be applied to a lattice member constituted by a solid member as in the modification of FIG. 6A and FIG. 6B.
[0053]
FIG. 10 is a partial view showing still another modified example of the lattice member 11 provided in the one embodiment.
In FIG. 10, reference numeral 32a denotes a protection member for protecting the rod-shaped member from abrasion and the like. This protection member 32a is formed by appropriately cutting a so-called round bar or the like into an appropriate length, and the upper-side rod-shaped member 20Ba ( Alternatively, it is fixed to the upper portion of the lower bar member 20Bb) by, for example, welding or the like. Reference numeral 32b is a protection member for the same purpose. The protection member 32b is formed of a member having a triangular cross section, and can also improve the cutting action of the earth mass. Further, from the viewpoint of improving the wear resistance of such a rod-shaped member, it is conceivable that the rod-shaped member 20E is composed of the relatively thin plate 33 and the relatively thick protective member 32c. .
[0054]
In this modification, the example in which the bar-shaped members 20Ba and 20Bb are provided with the protection member has been described. However, this protection member is applicable to each bar-shaped member described in the above-described embodiment and each modification. Needless to say.
[0055]
FIG. 11A is a top view showing the overall structure of still another modification of the lattice member 11 provided in the embodiment, and FIG. 11B is a side view seen from the lower side in FIG. FIG. 12 (a) and 12 (b) are front views as viewed from the left side in FIG. 11 (a), a cross-sectional view taken along XIIb-XIIb cross section, and FIG. 12 (c) is a cross-sectional view of a bar-shaped member at the upper step of the lattice. It is.
As shown in FIGS. 11 (a) and 11 (b), and FIGS. 12 (a) to 12 (c), in the present modification, the upper grating portion 11Ga is formed of a plurality of rod-shaped members 20Ga each having an inter-member dimension W1. The bar-shaped members 20Ga are formed of, for example, flat bars having a vertical dimension H1 and a horizontal dimension d1 (<H1). The lattice lower portion 11Gb is formed by arranging a plurality of rod-shaped members 20Gb in an inter-member dimension W2 (> W1), and these rod-shaped members 20Gb are substantially circular in cross section having a diameter dimension d2 (<H1) and a wall thickness dimension t1. (For example, pipe steel or the like, but may be solid). Further, each bar-shaped member 20Gb constituting the lower grid portion 11Gb engages with a plurality of cutout portions 35 (see FIG. 11B) provided below the respective bar-shaped members 20Ga constituting the upper grid portion 11Ga, for example, by welding. And so on.
[0056]
36 is a holding member, and a plurality of holding members are provided on the bar-shaped member 20Ga of the upper lattice portion 11Ga. Here, similarly to the above-described embodiment, the grid member 11G is actually inclined downward toward the left side in FIG. The soil mass having a particle size larger than the dimension W1 is vibrated, and moves to the downstream side (the left side in FIG. 11A) on the upper lattice portion 11Ga. Although it has been described above that the sieved and discharged earth and sand may originally contain components having properties to be introduced downward, the holding member 36 passes through the upper grid portion 11Ga. It plays a role to more efficiently take the components to be reformed into the hopper 21 in the soil mass discharged without being able to be formed. That is, the holding member 36 temporarily holds the earth mass moving to the downstream side on the upper portion of the upper lattice portion 11Ga before being discharged, and assists the primary cutting by vibration.
[0057]
In this case, for example, foreign substances such as stones may be temporarily held before being discharged. However, as shown in FIG. 11A, the holding member 36 is provided on the downstream side of the upper grid portion 11Ga (see FIG. 11A). 11 (a), it moves in the width direction (in this example, particularly in the upward direction in FIG. 11 (a), details will be described later) due to the vibration, and finally between the holding members 36. And is discharged.
[0058]
At this time, as shown in FIGS. 12A and 12B, the lattice member 11G is inclined downward in the width direction (left direction in FIG. 12A in this example). The action of gravity for moving the earth mass works on the upper side in addition to the left side in FIG. This allows the earth mass, foreign matter, and the like to move in the upper left direction in FIG. 11A, so that the stone and the like are not held by the holding member 36 for a long time. Further, in this example, the holding member 36 is formed of a substantially square plate-like member as shown in FIG. 12B, but the holding member 36 is not limited to this shape. 11 (a) is not limited to the configuration shown in FIG.
[0059]
Reference numeral 36a denotes a holding member provided at the most downstream (left end in FIG. 11A) of the lattice member 11G. The holding member 36a also plays a role similar to that of the holding member 36. It extends substantially the entire length in the width direction (vertical direction in FIG. 11A). Therefore, poor earth masses, stones, and the like that are not primarily cut are finally guided by the holding member 36a and discharged upward in FIG. 11A.
[0060]
Reference numeral 37 denotes a protection member having a circular cross section provided above each bar-shaped member 20Ga of the upper grid portion 11Ga. The protection member 37 has a diameter d3 slightly larger than the horizontal dimension d1 of the bar-shaped member 20Ga. . The protective member 37 is for preventing the passed earth and sand component from adhering to and growing on the side surface of the bar-shaped member 20Ga of the upper lattice portion 11Ga. That is, by providing the protective member 37 having a diameter slightly larger than the width of the rod-shaped member 20Ga, the frontage of the upper grid portion 11Ga becomes slightly narrower than the inter-member dimension W1, and the earth mass passing therethrough is reduced from the inter-member dimension W1. Are also granulated slightly smaller. Thereby, the possibility of the passing of the earth and sand component to the side surface of the rod-shaped member 20Ga is reduced, and the adhesion growth to the rod-shaped member 20Ga is prevented.
[0061]
However, as long as such an action is exerted, it is not limited to a member having a circular cross section as in this example, and the projected dimension may be slightly larger than the rod-shaped member 20Ga when viewed from the side where earth and sand are charged. A member having a triangular cross section such as the protection member 32b may be used. In other words, in this example, the diameter of the protection member 37 is circular because the cross section is circular, but the shape of the protection member is not limited to the circular cross section as described above with reference to FIG. Therefore, if the maximum dimension in the horizontal direction of the protection member is formed slightly larger than the horizontal dimension d1 of the bar-shaped member 20Ga, the protection member acts to prevent the sticking growth on the bar-shaped member 20Ga. Reference numeral 38 denotes an engagement portion with the main body 10 of the sieve device (see FIG. 3).
[0062]
Also in this modification, the same effect as in the above-described embodiment can be obtained. Further, since the inter-member dimension W2 of the lower lattice portion 11Gb is larger than the inter-member dimension W1 of the upper lattice portion 11Ga, the same effect as that of the modification described above with reference to FIGS. 8A and 8B is also obtained. Can be Further, by providing the holding members 36 and 36a, it is possible to improve the sorting performance of the soil mass which should be introduced into the hopper 21 as described above. By providing the protection member 37, the same effect as that of the modification of FIG. 10 can be obtained, and the adhesion and growth of the sediment component to the lattice member 11G can be prevented. Can be more effectively prevented from being reduced.
[0063]
Another embodiment of the self-propelled soil conditioner of the present invention will be described with reference to FIGS. 13 (a) and 13 (b).
FIGS. 13 (a) and 13 (b) are views showing the structure of a grid member 11F provided in the self-propelled soil conditioner of the present embodiment, and are respectively shown in FIGS. 4 (a) and 4 (a). It is a figure corresponding to (b).
13 (a) and 13 (b), the lattice member 11F used in the present embodiment is provided in the sieve device main body 10 (see FIG. 3), and has the same cross section as the rod-shaped members 20a and 20b, respectively. The rod-shaped members 20Fa and 20Fb are formed in a mesh shape without any level difference. That is, the lattice member 11F is configured by arranging a plurality of bar-shaped members Fa with an inter-member dimension W, and connecting the bar-shaped members 20Fa with a plurality of bar-shaped members 20Fb cut into the length W. Numeral 34 denotes a protruding portion projecting upward at the intersection of the bar-shaped members 20Fa and 20Fb of the mesh-shaped lattice member 11F, and is formed of, for example, a round bar. Other configurations are the same as those of the above-described embodiment.
[0064]
In the present embodiment, the grid member 11F is formed in a mesh shape by the rod-shaped members 20Fa and 20Fb, and the protruding portions 34 are provided at the intersections of the mesh, so that the cohesive soil and the like are improved as in the first embodiment. Even when the target soil is the quality target, it is possible to suppress a decrease in the opening area of the lattice member 11F. That is, since the protruding portions 34 are provided, it is possible to prevent the viscous soil from being deposited on the intersections of the meshes of the lattice member 11F, so that the adhesion and growth of the viscous soil can be suppressed. Further, when the soil is injected, the earth mass contained in the viscous soil is broken to a required particle size (substantially the dimension W between the rod-shaped members 20Fa and 20Fb in this example) by cutting the vibrating protrusions 34, and the mesh is meshed. It passes through the grid member 11F without being fitted.
Therefore, it is possible to prevent a decrease in the opening area of the grid member 11F, and to prevent the earth and sand originally to be introduced as the target soil for reforming from being removed without passing through the grid member 11F. In addition, it is possible to appropriately sort the supplied sediment-removal sand according to the particle size.
[0065]
Also in the present embodiment, similarly to the above-described one embodiment, the horizontal dimension d is relatively smaller than the vertical dimension H of the plurality of bar-shaped members 20Fa and 20Fb forming the lattice member 11F. Since it is formed of a member having a sectional shape, it is possible to secure a sufficient opening area while securing required strength. However, when the earth mass is sufficiently broken only by the action of the cut of the protruding portion 34 due to the properties of the injected earth and sand, the bar-shaped members 20Fa and 20Fb are not used in the cross-sectional shape as described above, and are generally used. It is also possible to adopt a structure in which a protruding portion 34 is provided at an intersection of the woven wire mesh using a lattice member of a woven wire mesh.
[0066]
Further, in the above description, an example in which the protruding portion 34 is configured by a round bar has been described. However, the present invention is not limited to this. For example, a square bar or the like may be used. The function can be obtained effectively. Further, the bar members 20Fa and 20Fb constituting the lattice member 11F are formed in the same manner as the above-described bar members 20a and 20b, but are similar to the bar members 20Aa to 20Da and 20Ab to 20Db used in the above-described modified examples. It is needless to say that one of the above may be used.
[0067]
In each of the above embodiments and modifications, the sieve device 8 including the lattice members 11, 11A to 11G can be used alone as a stationary sieve device. Further, in each of the embodiments and the modified examples, the lattice members are configured so that the bar-shaped members are substantially orthogonal to each other, but this is not a limitation. For example, a configuration may be adopted in which the bar-shaped members are crossed at a predetermined angle so that the eyes of the lattice member have a parallelogram shape when viewed from above.
[0068]
Further, in the above, the self-propelled soil improvement machine including the crawler belt 6 as the traveling body 1 has been described as an example. However, the present invention is not limited to this. It is also applicable to self-propelled soil improvement machines equipped. Further, when the input sediment has, for example, a soil property that is very fragile and easily granulated, the sieving device 8 may not be a vibrating sieve, but may be simply a fixed sieve having an inclined grid member. Further, for example, a self-propelled soil conditioner equipped with a so-called crushing type mixing device in which a rotary hitter is provided inside and crushes and mixes the earth and sand and the soil improving material with the rotary hitter is described in each of the above embodiments. It is also conceivable to apply the features of the modifications. In these cases, similar effects can be obtained.
[0069]
【The invention's effect】
BookAccording to the invention, a lattice member for sorting the received earth and sand in accordance with the particle size is formed in a mesh shape by a plurality of rod-shaped members, and at a crossing portion of the mesh so as to easily cut the earth mass contained in the injected earth and sand. By providing a plurality of protrusions projecting upward, respectively, similarly, even when the clay or the like is used as the soil to be modified, it is possible to prevent a decrease in the opening area of the lattice member, and The soil to be reformed can be appropriately sorted according to its particle size.
[Brief description of the drawings]
FIG. 1 is a side view showing the overall structure of an embodiment of a self-propelled soil conditioner of the present invention.
FIG. 2 is a top view showing the entire structure of the embodiment of the self-propelled soil conditioner according to the present invention.
FIG. 3 is a perspective view showing a detailed structure of a sieve device provided in the embodiment of the self-propelled soil improvement machine of the present invention.
FIG. 4 is a view showing the structure of a lattice member provided in the embodiment of the self-propelled soil conditioner according to the present invention, as viewed from the directions of arrows IVa and IVb in FIG. 3;
FIG. 5 is a view schematically showing a state in which an earth mass passes through a lattice member provided in an embodiment of the self-propelled soil improvement machine of the present invention.
FIG. 6 is a view corresponding to FIGS. 4 (a) and 4 (b) showing a modification of the lattice member provided in the self-propelled soil improvement machine of the present invention.
FIG. 7 is a view corresponding to FIGS. 4 (a) and 4 (b) showing another modification of the lattice member provided in the self-propelled soil improvement machine of the present invention.
FIG. 8 is a view corresponding to FIGS. 4 (a) and 4 (b), showing still another modification of the lattice member provided in the self-propelled soil improvement machine of the present invention.
FIG. 9 is a perspective view showing still another modified example of the lattice member provided in the self-propelled soil conditioner of the present invention.
FIG. 10 is a partial view showing still another modified example of the lattice member provided in the self-propelled soil conditioner of the present invention.
FIG. 11 is a top view showing the overall structure of still another modification of the lattice member provided in the self-propelled soil conditioner of the present invention, and a side view as viewed from below in the figure.
12A is a front view as viewed from the left side in FIG. 11A, a cross-sectional view taken along the line XIIb-XIIb in FIG.
FIG. 13 is a view corresponding to FIGS. 4 (a) and 4 (b) showing a structure of a lattice member provided in another embodiment of the self-propelled soil conditioner of the present invention.
[Explanation of symbols]
1 running body (running means)
7 Body frame
10 Sieving device body
11 Grid member
11a Upper part of lattice
11b Lower part of lattice
11A-G lattice member
11Aa-Da Upper part of lattice
11Ab to Db Lower part of lattice
11Ga Lattice upper part
11Gb lattice lower part
20a, b rod members
20Aa-Ga rod-shaped member
20Ab to Gb rod-shaped member
20E rod-shaped member
21 Hopper
22 Conveyor
23 tank
26 Supply unit
27 Mixing device
29 Discharge conveyor
32a-c protection member
34 Projection
37 Protective member

Claims (2)

In a self-propelled soil improvement machine to reform soil,
A main body frame provided with running means,
A mixing device provided on the main body frame;
A conveyor provided on one side in the longitudinal direction of the main body frame, and the other side is provided to face the mixing device,
A hopper for receiving earth and sand provided above one end of the conveyor,
A tank for storing a soil improving material disposed so that its supply unit is located above the other end of the conveyor,
A discharge conveyor provided on the main body frame so as to extend from a lower position of the mixing device to an outer position on the other longitudinal side of the main body frame,
A sieve device main body oscillatingly provided above the hopper for receiving earth and sand, a grid member provided in the main body of the sieve device and configured in a mesh shape by a plurality of rod-shaped members, A self-propelled soil improvement machine, comprising: a sieve device having a plurality of protrusions respectively provided at upper portions of the intersections of the lattice members so as to facilitate cutting. In a sieve device for a self-propelled soil conditioner provided in a self-propelled soil conditioner for reforming soil,
A sieve device main body provided so as to be able to vibrate above a hopper for receiving earth and sand,
A lattice member provided in the main body of the sieve device and configured in a mesh shape by a plurality of rod-shaped members,
Self-propelled soil improvement machine for screen device being characterized in that a plurality of projecting portions provided respectively at the intersection the top of the grid member so as to facilitate cutting a clod contained in sediment to be introduced.

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