JP7203425B2 - Multi-shaft crusher and sieve device - Google Patents

Description

The present invention is a multi-axis crusher capable of crushing and sorting earth and sand generated in civil engineering excavation work or the like, or earth and sand containing concrete lumps, crushed stones, etc., and mixing and kneading with a soil conditioner. It relates to a sieving device.

2. Description of the Related Art Conventionally, as a device for treating construction soil (earth and sand) generated by civil engineering excavation work or the like, a construction soil treatment device disclosed in Patent Document 1 has been proposed.

This device is capable of sieving construction-generated soil with the roll screen and crushing large raw materials transported on the roll screen with a crushing cutter provided close to the upper part of the roll screen. A belt feeder is provided under the sieve, and a mixer is provided at the destination of the belt feeder. , is a device capable of producing improved soil.

JP-A-2002-143819

By the way, in the above-mentioned conventional apparatus, since the crushing cutter is provided only at one place in the middle of the upper surface of the roll screen and close to the upper surface of the roll screen, the raw material that does not reach the position of the crushing cutter is crushed. Therefore, there is a problem that the charged raw materials cannot be evenly crushed and sieved.

In addition, in order to improve the quality of construction soil, there is a problem that a mixer for mixing raw material under sieving and a solidification material is separately required in addition to the roll screen and belt feeder.

SUMMARY OF THE INVENTION An object of the present invention is to provide a multi-shaft crushing and sieving apparatus capable of crushing and sieving raw materials (earth and sand, etc.) generated in civil engineering excavation work or the like with a single apparatus.

Another object of the present invention is to provide a multi-shaft crushing and sieving device capable of performing the crushing operation and the sieving operation as well as the mixing operation of the soil conditioner and the like with the soil and sand in one unit.

In order to achieve the above object, the present invention
First, an upper rotating roll portion composed of a plurality of rotating rolls pivotally supported by left and right side plate portions at predetermined intervals in a direction perpendicular to the traveling direction of the raw material, and a position lower than the upper rotating roll portion. In parallel with the upper rotating roll, a lower rotating roll portion consisting of a plurality of rotating rolls pivotally supported by the left and right side plate portions with a predetermined interval, and a downwardly inclined housing is provided on the machine frame. The rotating rolls in the lower stage are arranged in a plane so as to be positioned between the adjacent rotating rolls in the upper stage, and a plurality of crushing disks are fixed to each of the rotating rolls in the upper and lower stages in the axial direction. The crushing discs of the lower rotating rolls are axially arranged so as to be positioned between the two crushing discs of the upper rotating rolls, and between the adjacent rotating rolls of the upper and lower stages and between the upper and lower stages. The gaps between the crushing discs are configured as sieve meshes, and an upper roller driving means for rotationally driving the upper rotating rolls, and a lower stage for rotating and driving the lower rotating rolls independently of the upper rotating rolls. A roller driving means is provided, a hopper for charging raw materials is provided at the upper opening of the housing, a lower chute is provided at the lower opening of the housing, and a side plate on the downstream side of the housing is provided. a multi-shaft type crushing sieve device provided with a discharge chute above the sieve, wherein the upper roller driving means includes a group of driving pulleys for rotationally driving a group of upper rotating rolls on the upstream side; A first upper roller drive means configured by a drive belt for rotating the group of drive pulleys, a remaining group of drive pulleys for rotationally driving the remaining group of upper rotating rolls on the downstream side, and the remaining group of drive pulleys. The second upper roller driving means is composed of a driving belt for rotating a group of driving pulleys, and the lower roller driving means is a group of driving pulleys for rotationally driving the lower rotating roll of the group on the upstream side. , a first lower roller drive means constituted by a drive belt for rotating the group of drive pulleys; a remaining group of drive pulleys for rotationally driving the remaining group of lower rotating rolls on the downstream side; The first and second upper roller driving means are composed of a driving belt for rotating a group of driving pulleys. Independently provided, the first and second upper roller driving means are capable of independently controlling the rotational direction and/or the rotational speed of each of the drive motors. The first and second lower roller driving means are provided with independent drive motors and inverter control means, respectively, and the first and second lower roller driving means It consists of a multi-shaft crushing and sieving device that is constructed so that the direction of rotation and/or the speed of rotation of the drive motor can be independently controlled .

The side plate portion on which the upper rotating roll is pivotally supported can be composed of left and right side plates (4a, 4b) and bearings (21a, 21b). The side plate portion on which the lower rotating roll is pivotally supported can be composed of left and right side plates (4a, 4b) and bearings (28a, 28b). The upper roller driving means includes drive pulleys (2a ₁ to 2a ₁₂ ) for the upper rotating rollers, a belt (12) connecting them, and a drive motor for driving the drive pulleys (2a ₁ to 2a ₁₂ ). (M1, M2). The lower roller driving means includes drive pulleys (3a ₁ to 3a ₁₁ ) for the lower rotating rollers, a belt (12) connecting them, and a drive motor for driving the drive pulleys (3a ₁ to 3a ₁₁ ). (M3, M4). With this configuration, when raw material such as earth and sand is put into the hopper, the raw material is crushed by the upper and lower crushing discs arranged over the entire area of the upper and lower rotating rolls, and the raw material smaller than the sieve mesh (under sieve) is crushed by the upper and lower crushing disks. is discharged downward from the lower chute, and the raw material larger than the screen mesh (over the sieve) can be discharged from the discharge chute on the downstream side, and the raw material crushing operation and sieving operation can be performed simultaneously. The first upper roller drive means is the drive motor (M1) and inverter control circuit (m1), the second upper roller drive means is the drive motor (M2) and inverter control circuit (m2), and the first lower roller drive means. The means can be composed of the drive motor (M3) and the inverter control circuit (m3), and the second lower roller drive means can be composed of the drive motor (M4) and the inverter control circuit (m4). With this configuration, the upper stage rotating rolls are configured so that the upstream group of rotating rolls (2 ₁ to 2 ₆ ) and the downstream group of rotating rolls (2 ₇ to 2 ₁₂ ) rotate in opposite directions, and the lower upstream rotating rolls rotate in opposite directions. The rotating rolls (3 ₁ to 3 ₆ ) of the upper stage are set in the opposite direction to the rotating direction of the upper upstream group of rotating rolls, and the lower downstream group of rotating rolls (3 ₇ to 3 ₁₁ ) are set to the upper downstream group of rotating rolls. By making the rotating direction of the rotating rolls opposite to the rotating direction of the upstream side and the downstream side, for example, the crushing efficiency can be further improved. The inverter control means can be composed of inverter control circuits (m1 to m4). With this configuration, the upper upstream group of rotary rolls, the upper downstream group of rotary rolls, the lower upstream group of rotary rolls, and the lower downstream group of rotary rolls rotate in the respective directions and directions. / Or the rotation speed can be independently controlled, and it is possible to set the optimum rotation direction and / or rotation speed according to the properties of the raw material.

Secondly, the multi-shaft crushing sieve apparatus according to the first above, wherein the upper crushing disc and the lower crushing disc adjacent to the crushing disc are overlapped at the outer periphery. Consists of

With this configuration, when the upper and lower rotating rolls are viewed in plan, the screen meshes (spaces) formed by the upper and lower crushing discs become finer. By rotating in the direction, it becomes possible to crush the raw material so as to draw the raw material into the narrow mesh space, and the efficiency of crushing can be further improved.

Third, each of the crushing discs of the upper and lower rotating rolls is provided with a plurality of protruding pieces on each outer peripheral portion, and the rotating shafts of the upper and lower rotating rolls each have a cross section Each of the upper and lower crushing discs has a polygonal cross-sectional shape similar to the polygonal cross-sectional shape of the rotary shaft. Thus, the upper and lower crushing discs are mounted on the rotating shaft, and are composed of two disc pieces divided along a dividing line along the diameter line. 3. The multi-shaft crushing sieve apparatus according to claim 1 or 2, wherein the two disk pieces are joined together with the insertion openings aligned, and the two disk pieces are joined together with the protruding piece. .

With this configuration, for example, by rotating the upper and lower crushing discs in opposite directions, the protruding pieces of each disc make it easier to draw the raw material into the narrow sieve mesh (space), further increasing the crushing efficiency of the raw material. be able to. The insertion opening can be composed of an opening (22a) and a shaft insertion opening (23a) for the upper crushing disk, and an opening (30a) and a shaft insertion opening (31a) for the lower crushing disk. With this configuration, it is possible to easily fix the crushing disk and the rotating shaft. The disk pieces are composed of left half (22 ₁ ) and right half (22 ₂ ) in the upper crushing disk, and left half (30 ₁ ) and right half (30 ₂ ) in the lower crushing disk. can do. With this configuration, the crushing disk can be easily attached to the rotating shaft, and the crushing disk that does not rotate around the central axis of the rotating shaft can be easily configured.

Fourthly, the multi-shaft crushing and sieving apparatus according to any one of the above first to thirds, wherein the diameter of the crushing disc of the lower rotating roll is larger than the diameter of the crushing disc of the upper rotating roll. Consists of

With this configuration, the outer peripheral portions of the upper crushing disk and the lower crushing disk are easily overlapped, and the crushing efficiency can be enhanced.

Fifth, a conveyer is provided upstream of the hopper for charging the raw material into the hopper, and a conveyer is provided below the lower chute for conveying the raw material under the sieve. It is composed of the multi-shaft type crushing sieve device according to any one of the above 1st to 4th.

With this configuration, the raw material can be continuously fed into the hopper by the conveyer, and the raw material below the sieve can be continuously conveyed by the conveyer below the lower chute.

Sixthly , the hopper is configured to put a soil conditioner together with the raw material into the hopper, and the raw material and the soil conditioner can be mixed in the process of crushing the raw material with the upper and lower crushing discs. It is composed of the multi-shaft type crushing and sieving device according to any one of the above 1st to 5th , which is constructed as follows.

The above soil conditioner is, for example, lime powder or the like as a solidifying agent. With this configuration, the operation of crushing and sieving the raw material and the operation of mixing the earth and sand with the soil conditioner can be performed at the same time.

According to the present invention, as described above, while the raw material is crushed by the upper and lower crushing discs arranged over the entire upper and lower rotating rolls, the raw material smaller than the screen mesh (under sieve) is discharged downward from the lower chute, Raw materials larger than the sieve mesh (over sieve) can be discharged from a discharge chute on the downstream side, and the raw material crushing operation and sieving operation can be performed simultaneously. Further, by making the rotation directions of the rotating rolls opposite to each other on the upstream side and the downstream side, for example, the crushing efficiency can be further improved. In addition, each rotation direction and/or rotation speed of a group of rotating rolls on the upper upstream side, a group of rotating rolls on the upper downstream side, a group of rotating rolls on the lower upstream side, and a group of rotating rolls on the lower downstream side can be independently controlled, and it is possible to set the optimum rotation direction and/or rotation speed according to the properties of the raw material.

In addition, since the upper and lower crushing discs are arranged to overlap each other, for example, by rotating the adjacent upper and lower crushing discs in opposite directions, the raw material is crushed so as to be pulled into the narrow mesh space. It is possible to increase the efficiency of crushing.

In addition, since the projecting pieces are provided on the outside of the crushing discs, for example, by rotating the upper and lower crushing discs in opposite directions, the material can be easily drawn into the narrow sieve meshes (spaces) by the projecting pieces of each disc. It becomes possible to further improve the crushing efficiency of the raw material.

Further, by making the diameter of the lower crushing discs larger than that of the upper crushing discs, the outer circumferences of the upper and lower crushing discs are easily overlapped, and the crushing efficiency can be enhanced.

In addition, the raw material can be continuously fed into the hopper by the conveyer, and the raw material under the sieve can be continuously carried out by the conveyer below the lower chute.

In addition, since the rotating shaft of the rotating roll has a polygonal cross section, the crushing disk and the rotating shaft can be easily fixed.

In addition, since the crushing disk is composed of two divided disk pieces, the crushing disk can be easily attached to the rotating shaft, and the crushing disk that does not rotate around the central axis of the rotating shaft can be easily attached. can be configured to

In addition, the operation of crushing the raw material, the operation of sieving, and the operation of mixing the earth and sand with the soil conditioner can be performed at the same time.

FIG. 3 is a side view showing the operating state of the multi-shaft crushing sieve device according to the present invention; It is a perspective view of the apparatus same as the above. It is a side view of the apparatus same as the above. It is a perspective view of the upper-and-lower stage rotation roll part of an apparatus same as the above. It is a top view of the inclination state of the upper-and-lower stage rotation roll part of the apparatus same as the above. It is a cross-section taken along the line XX of FIG. 5, but a cross-sectional view of a state in which the rectangular housing is installed horizontally. It is a side view of the state which installed the rectangular housing|casing of the apparatus same as the above horizontally. FIG. 7 is a cross-sectional view taken along the line YY of FIG. 6, showing only the upper rotating roll (one roll). FIG. 7 is a ZZ cross-sectional view of FIG. 6, showing only the lower rotating roll (one roll). It is the back view which looked at the upstream from the downstream of the apparatus same as the above. It is a back view near the outlet of the downstream of the device same as the above. (a) is a longitudinal cross-sectional view of the upper crushing disc (cross-sectional view taken along line KK of (c)), (b) is a plan view of the same disc, and (c) is a side view of the same disc. (a) is a cross-sectional view of the divided state of the upper crushing disk, (b) is a plan view of the same disk, and (c) is a side view of the same disk. (a) is a vertical cross-sectional view of the lower crushing disk (cross-sectional view taken along line RR in (c)), (b) is a plan view of the same disk, and (c) is a side view of the same disk. (a) is a vertical cross-sectional view of the lower crushing disc in a split state, (b) is a plan view of the same disc, and (c) is a side view of the same disc. FIG. 4 is a vertical cross-sectional view of both discs showing the relationship between the upper crushing disc and the lower crushing disc. FIG. 4 is a vertical cross-sectional view of the lower crushing disc attached to the lower rotating shaft at different angles. It is a top view of the lower chute of the apparatus same as the above. FIG. 6 is a partially enlarged view of area (N) in FIG. 5 of the device; It is a table|surface which shows an example of the rotation direction of the rotating roll of an apparatus same as the above. (a) is a cross-sectional view of the rotating shaft in the upper stage, and (b) is a cross-sectional view of the rotating shaft in the lower stage.

The multi-shaft crushing sieve apparatus according to the present invention will be described in detail below.

First, referring to FIGS. 1 and 2, the overall configuration of a multi-shaft crushing sieve apparatus 1 according to the present invention will be described.
In the same figure, the apparatus 1 comprises multi-axis upper and lower rotary rolls 2 and 3 (the upper rotary roll 2 is composed of 12 rolls) and consists of an upper rotary roll section 2A and a lower rotary roll section 3A (see FIG. 6). 11 lower rotating rolls 3, and the rotating shafts 2b, 3b of any rotating rolls 2, 3 have a hexagonal cross section, see FIGS. (See FIGS. 4, 8, and 9) and a rectangular housing 4 (upper and lower openings), which is inclined downward so that the upstream side of the rectangular housing 4 is at a high position and the downstream side is at a low position. A flange 6a is attached to a machine frame 5 supported on a horizontal ground G in a state and an upper opening flange 4c provided in a rectangular upper opening 4d of the housing 4 (see FIGS. 4 and 6). A hopper 6 having a rectangular upper opening 6b (see FIG. 2) inclined at the same inclination angle as the housing 4 and a rectangular lower opening 4e (see FIG. 6) of the housing 4. , and a lower chute 17 which is connected so as to extend downward, and which is formed horizontally so that the opening edge of a rectangular lower opening 17a extends along the ground G. As shown in FIG.

Both ends of the twelve rotating rolls 2 in the upper stage are rotatably supported by the left and right side plates 4a and 4b by bearings 21a and 21b (see FIGS. 5 and 8). Both ends of the rotary roll 3 for books are rotatably supported by bearings 28a and 28b on the left and right side plates 4a and 4b (see FIGS. 5 and 9). Each of the rotating rolls 2, 3 of the upper and lower rotating roll portions 2A, 3A is provided parallel to the direction orthogonal to the traveling direction of the raw material.

1 and 2, the high position side of the housing 4 is "upstream side" or "front side", the low position side of the housing 4 is "downstream side" or "rear side", and the upstream side. Up and down, left and right when viewed from the downstream side are defined as "vertical direction" and "horizontal direction". Accordingly, the raw material put into the hopper 6 is transferred from the upstream side to the downstream side on the upper and lower rotating roll portions 2A and 3A.

In addition, regarding the upper and lower rotating rolls 2 and 3, when indicating the entire upper rotating roll (12 rolls), or when not specifying the position, the code "2" When indicating an individual rotating roll , "2 ₁ , _{2 2} , 2 ₃ . If not, the symbol "3" will be used, and if individual rotating rolls will be indicated, they will be suffixed from the upstream side to be "3 ₁ , 3 ₂ , 3 ₃ . . . 3 ₁₁ " (see FIG. 5). Further, the crushing discs provided in the axial direction of the rotary rolls 2 and 3 are indicated by reference numerals "7" and "8", respectively (see FIGS. 5 and 6).

Likewise, the drive pulley 2a of the upper rotating roll 2 is indicated by the symbol "2a" when indicating the whole or when the position is not specified. 2a ₁ to 2a ₁₂ (see FIGS. 5 and 7), and similarly for the driving pulley 3a of the lower rotating roll 3, when the whole is shown or when the position is not specified, , reference numeral "3a", and when indicating individual drive pulleys, subscripts are added from the upstream side and "3a ₁ to 3a ₁₁ " (see FIG. 5),

In FIG. 5, the outer side (right side) of each central axis P1 of the upper rotating roll 2 is denoted by 2 ₁ to 2 ₁₂ , and the lower rotating roll 3 is indicated by the outer side of each central axis P3. (Left side) are labeled 3 ₁ to 3 ₁₁ .

A side plate 4f on the short side at the downstream end of the casing 4 is provided with a rectangular lower outlet opening 4f' (see FIG. 4). The discharge cylinder portion 6d projecting toward the downstream side is formed integrally with the side plate 6c (see FIGS. 3 and 18), and the downstream end of the discharge cylinder portion 6d is located on the lower side. An upper discharge opening 6d' integrated with the discharge opening 4f' is formed (see FIGS. 2, 3, and 11). Therefore, a rectangular discharge opening 9 is formed by the lower discharge opening 4f' and the upper discharge opening 6d'. ' (see FIG. 2). The hopper 6 has an inclined surface 6e formed at its upstream end to smoothly guide the charged raw material to the downstream side and has a depth of a long distance T8 in the vertical direction (see FIG. 3).

Therefore, as shown in FIG. 3, the earth and sand F thrown into the hopper 6 are stacked in the hopper 6 in a state having a certain thickness (in the vertical direction), and in this state are applied to the upper and lower rotating rolls 2A and 3A. It is sorted while being crushed and/or kneaded (mixed) by the sieving and is transferred to the downstream side of the downward slope, and the undersieving (fine soil or improved soil) falls downward from the lower opening 17a of the lower chute 17. The sieves (relatively large concrete chunks, crushed stones, etc.) are thrown into the discharge chute 10 from the discharge opening 9 at the downstream end and discharged.

The discharge chute 10 discharges the raw material (so-called sieve) that has moved on the upper rotating roll portion 2A, and the discharge opening 10a has the same area as the discharge opening 9. It is.

As shown in FIGS. 3 and 11, the lower edge level of the lower discharge opening 4f' is at the same height as the central axis P1 of each rotating shaft 2b of the rotating rolls 2 of the upper rotating roll section 2A. Therefore, the discharge chute 10 discharges the raw material (raw material larger than the screen meshes S1 and S2) that has moved downstream on the so-called upper rotating roll section 2A, that is, the so-called sieved material. This discharge chute 10 has a discharge port 10b in the right direction, and is configured to discharge so-called sieve raw materials (for example, raw materials with a size exceeding 100 mm to 150 mm) from the right discharge port 10b. there is

The lower chute 17 (see FIGS. 3 and 19) has an upstream end side plate with an inclined surface 17b inclined downstream (at the same angle of inclination as the inclined surface 6e of the hopper 6), and a downstream end side plate with an upstream side plate. The left and right side plates have inclined surfaces 17d, 17d inclined downward. It is configured to have a small area opening slightly downstream (see FIGS. 3 and 18). As a result, the raw material under the sieves by the upper and lower rotating roll portions 2A and 3A is configured to smoothly drop downward through the inclined surfaces 17b, 17c and 17d.

The machine frame 5 includes an upper support rod 11 projecting in the left-right direction from the upstream end of the housing 4, an upper strut 5a pivotally fixed at both ends thereof by an upper end portion 5a', 5a (two on the left and right), and a lower support rod 11' provided at the downstream end of the rectangular inclined housing 4 so as to protrude in the left and right direction. It is composed of lower pillars 5b, 5b (two on the left and right) that are pivotally fixed.

In FIG. 2, 5c is a reinforcing rod (two on the left and right) provided between the upper and lower columns 5a and 5b, and 5d is a reinforcing rod that is inclined between the reinforcing rod 5c and the upper and lower support columns 5a and 5b. , 5e are reinforcing rods provided between the upper struts 5a and 5a, and 5f is a reinforcing rod provided between the lower struts 5b and 5b.

Each of the upper rotating rolls 2 (bearings 21a and 21b at both ends) has its right end protruded toward the right side plate 4a, further protrudes to the right from the right bearing 21a, and has its protruding end for driving. A pulley 2a (2a ₁ to 2a ₁₂ ) is fixed (see FIGS. 5, 7 and 8). Of these driving pulleys 2a, the six driving pulleys 2a ₁ to 2a ₆ on the right upstream side have two driving pulleys 2a ₁ and 2a ₂ , two driving pulleys 2a ₂ and 2a ₃ , and two driving pulleys 2a 2 and 2a 3 . 2a ₃ and 2a ₄ , drive pulleys 2a ₄ and 2a ₅ , and drive pulleys 2a ₅ and 2a ₆ , five drive belts 12 are looped around the adjacent drive pulleys so as to overlap each other to drive the upstream end. By winding the drive belt 12 between the drive pulley 2a ₁ and the drive pulley 13 of the drive motor M1, the rotation rolls 2 ₁ to 2 ₆ are driven independently of the rotation rolls 2 ₇ to 2 ₁₂ . It is configured to be able to rotate forward and reverse in the same direction.

In addition, for the six drive pulleys 2a ₇ to 2a ₁₂ on the right downstream side, two drive pulleys 2a ₇ and 2a ₈ , drive pulleys 2a ₈ and 2a ₉ , drive pulleys 2a ₉ and 2a ₁₀ , drive pulleys 2a ₁₀ and 2a ₁₁ , and drive pulleys 2a ₁₁ and 2a ₁₂ , five drive belts 12 are wound around the adjacent drive pulleys so as to overlap the drive pulleys 2a 11 and 2a 12 . ₁₂ and the driving pulley ₁₃ of the driving motor M2, the rotating rolls ₂₇ to 212 are rotated in the same direction independently of the rotating rolls ₂₁ to ₂₆ . It is configured so that it can be reversely rotated.

Further, each of the lower rotary rolls 3 (bearings 28a and 28b at both ends) (see FIG. 5) has a left end protruding outside the left side plate 4b, and a protruding end further protruding to the left than each bearing 28b. , drive pulleys 3a (3a ₁ to 3a ₁₁ ) are fixed to each of them. Of these driving pulleys, six driving pulleys 3a ₁ to 3a ₆ on the left upstream side include two driving pulleys 3a ₁ and 3a ₂ , two driving pulleys 3a ₂ and 3a ₃ , and two driving pulleys 3a 2 and 3a 3 . Five drive belts 12 are wound around pulleys 3a ₃ and 3a ₄ , drive pulleys 3a ₄ and 3a ₅ , and drive pulleys 3a ₅ and 3a ₆ so as to overlap the adjacent drive pulleys. The rotating rolls 3 ₁ to 3 ₆ are separated from the rotating rolls 3 ₇ to 3 ₁₁ by winding the driving belt 12 between the driving pulley 3a ₁ at the end and the driving pulley 13 of the driving motor M3. It is configured so that it can be independently rotated forward and reverse in the same direction.

In addition, for the five drive pulleys 3a ₇ to 3a ₁₁ on the left downstream side, two drive pulleys 3a ₇ and 3a ₈ , drive pulleys 3a ₈ and 3a ₉ , drive pulleys 3a ₉ and 3a ₁₀ , four drive belts 12 are wound around the drive pulleys 3a ₁₀ and 3a ₁₁ so as to overlap the adjacent drive pulleys, and the drive pulley 3a ₁₁ at the downstream end and the drive motor M4 are driven. By winding a drive belt 12 around a pulley 13, the rotating rolls 3 ₇ to 3 ₁₁ can be driven to rotate forward and reverse in the same direction independently of the rotating rolls 3 ₁ to 3 ₆ . It is

The drive motors M1 to M4 have inverter control circuits m1 to m4, respectively, so that the inverters can independently control the rotation speed and rotation direction. In FIG. 1, reference numeral 4g denotes a plate on which the drive motors M1 and M3 are placed and fixed, and the drive motors M2 and M4 are placed and fixed on the discharge cylinder 6d.

Then, as shown in FIG. 1, a material input port 15a is provided by fixing an input chute 15 on the upstream end of the hopper 6, and the tip roller 14 of the conveyer 16 is placed above the material input port 15a. By providing it, the conveyor belt 16a of the conveyer 16 is driven in the direction of arrow A, and the material can be thrown into the hopper 6 (direction of arrow D).

The conveyor belt 16a is provided so as to be able to travel horizontally below the lower opening 17a of the chute 17 after being looped around a lower end roller 18 provided on the front side near the ground G. there is Therefore, since the transfer conveyor 16 passes below the lower opening 17a of the chute 17 in the direction of the arrow A, the sieve meshes S1 and S2 (see FIGS. 5 and 19) between the upper and lower rotating rolls 2 and 3 are moved. It receives the so-called under-sieve raw material (raw material with a diameter of about 100 mm to 150 mm or less) that has passed through the lower opening 17a and is conveyed in the direction of the arrow A.

In FIG. 1, reference numeral 37 denotes a hopper for charging the soil conditioner, which is installed on the conveyor belt 16a on the upstream side of the tip roller 14 of the conveyer 16. As shown in FIG. The hopper 37 is constructed so that the soil conditioner can be added to the earth and sand by dropping the soil conditioner onto the raw materials such as earth and sand conveyed on the conveyer 16 .

Reference numeral 19 denotes a support roller that supports the lower portion of the conveyor belt 16a on the upstream side of the tip end roller 14; 20 denotes a support roller that horizontally supports the lower portion of the conveyor belt 16a on the downstream side of the lower end roller 18; The conveyor belt 16a is driven in the direction of arrow A by a driving roller (not shown) to receive the under-sieves falling from the lower opening 17a of the chute 17 and convey them downstream (in the direction of arrow A).

Next, since the rotary rolls 2 ₁ to 2 ₁₂ of the upper rotary roll section 2A have the same structure, the structure of one rotary roll 2 will be described with reference to FIG.

The upper rotating roll 2 is composed of a rotating shaft 2b having a hexagonal cross section (see FIG. 6). They are rotatably provided by bearings 21a and 21b provided outside the side plates 4a and 4b. Further, the right end projects outward from the bearing 21a, and the driving pulley 2a is connected and fixed to the projecting end.

Six crushing discs 7 shown in FIGS. 12 and 13 (three on the left side and three on the right side of the center line P1, see FIG. 8) are fixed to the upper rotary roll 2 in the axial direction. there is Since the six crushing discs 7 have the same structure, one of them will be described in detail with reference to FIGS. 12 and 13. FIG.

In FIG. 12, the crushing disc 7 is composed of a substantially circular disc portion 22 (eg, about 230 mm in diameter) and a cylindrical sleeve 23 . A hexagonal opening 22a having substantially the same area (similar shape) as the hexagonal cross section of the rotating shaft 2b is formed at the center of the disk portion 22. As shown in FIG. As shown in FIG. 13, the disk portion 22 for crushing is divided into _two disk pieces, a left half portion 22-1 and _a right half portion 22-2, centered on a dividing line L1 along the diameter line. Joining cutouts 22c and 22d are formed at both ends of the line L1, and two female screw holes B' are formed in each of the cutouts 22c and 22d.

Then, the left half portion 22-1 and the right half portion 22-2 are fitted to the hexagonal prism rotating shaft 2b so that the shape of the hexagonal opening 22a at the center is matched, and both the left and right _half portions 22 _are fitted. _The parts of ₁ and 222 along the parting line L1 are joined, and the projecting pieces 24, 24 as joining pieces are fitted into the notches 22c, 22d, respectively, and from the outside of the projecting pieces 24, 24, Two bolts B, B are inserted into the respective bolt holes of the protruding pieces 24, 24 through the protruding pieces 24, 24, and the female screws of the left _half portion 22-1 and the right _half portion 22-2 of the disc portion 22 are inserted. By screwing into the holes B', B', the disc 7 for crushing can be fixed to the rotating shaft 2b as one disc. As a result, the crushing disk 7 is fixed to the hexagonal rotating shaft 2b without rotating in the circumferential direction.

As shown in FIG. 12, the protruding pieces 24, 24 are provided at two locations separated by 180 degrees on the outer peripheral edge of the crushing disk 7. By rotating around the rotating shaft 2b (the central axis P1 of the rotating shaft 2b), the raw material is transferred to the downstream side, and together with the lower crushing disc 8, a large raw material It has the function of crushing

The sleeve portion 23 has a cylindrical shape as described above, and is provided at its center with a hexagonal column-shaped shaft insertion opening 23a having substantially the same cross-sectional area as the hexagonal cross-section of the rotating shaft 2b. . In addition, six screw holes 25 are provided at intervals of 60 degrees in the circumferential direction around the central axis P1 in the end wall thickness 23' of the sleeve portion 23 on the side to which the disk portion 22 is connected. Six screw holes 26 are also formed around the hexagonal opening 22a of the crushing disk 7 at positions corresponding to the screw holes 25, that is, at intervals of 60 degrees in the circumferential direction. there is

Female screw holes 27 penetrating the shaft insertion port 23a in the radial direction are provided at four locations at every 90 degrees on the outer peripheral surface of the sleeve portion 23. Four female screw holes 29 (see FIG. 21(a)) are provided at positions (four places) corresponding to the four female screw holes 27 at the locations where the 23 is fixed. Then, the sleeve portion 23 is inserted through the shaft insertion opening 23a into the rotating shaft 2b, positioned at the fixed position of the sleeve portion 23, the female screw hole 27 and the female screw hole 29 are aligned, A bolt B is inserted into each female screw hole 27 from the outer periphery of the sleeve portion 23 and screwed. Then, the bolts B reach the female screw holes 29 of the rotary shaft 2b through the female screw holes 27 of the sleeve portion 23, so that the bolts B reach the shaft of the sleeve portion 23 at the position of the rotary shaft 2b. The direction position can be fixed.

After that, the left half portion 22 ₁ and the right half portion 22 ₂ of the crushing disk 7 are joined by aligning the parting line L 1 at the position where the disk surface contacts the end thickness 23 ′ of the sleeve portion 23 . Then, six bolts B are screwed into the female screw holes 26 (six places) from the side of the disc 7 where the sleeve portion 23 is not attached, and the tip of each bolt B is screwed into the female screw of the sleeve portion 23. It is screwed into the hole 25 and thereby secures the disc portion 22 to the sleeve portion 23 . With this configuration, the disc 7 for crushing can be configured by fixing the disc portion 22 and the sleeve portion 23 to the rotating shaft 2b.

Actually, as shown in FIG. 8, one upper rotating roll 2 has the crushing disk 7 on the left side of the center line P1 in the horizontal direction (the sleeve portion 23 is on the inside). ), three crushing discs 7 are fixed with a disc interval T1 (for example, T1=200 mm), and on the right side, the crushing disc 7 is facing outward (the sleeve portion 23 is facing inward). ), three crushing discs 7 are fixed with an interval T1. Therefore, the other end portions 23 ″, 23 ″ of the sleeve portions 23 , 23 are in contact with the center line P 1 of the rotary roll 2 . The interval between the central crushing disks 7, 7 is also T1.

Next, since the rotating rolls 3 ₁ to 3 ₁₁ of the lower rotating roll section 3A have the same structure, the structure of one rotating roll 3 will be described with reference to FIG.

The lower rotating roll 3 is composed of a rotating shaft 3b having a hexagonal cross section. It is rotatably provided by provided bearings 28a and 28b. Further, the left end projects outward from the bearing 28b, and the driving pulley 3a is connected and fixed to the projecting end.

Seven crushing discs 8 (three on the left side, three on the right side, and one at the center line P3 position) shown in FIGS. Since these seven crushing discs 8 have the same structure, one crushing disc 8 will be described in detail with reference to FIGS. 14 and 15. FIG.

14, the crushing disc 8 is composed of a substantially square disc portion 30 (the diameter from the central axis P3 to the maximum diameter portion is approximately 290 mm, for example) and a cylindrical sleeve portion 31. As shown in FIG. The disk portion 30 has an opening 30a having a hexagonal cross section and substantially the same area (similar shape) as the hexagonal cross section of the rotating shaft 3b. As shown in FIG. 15, the disk portion 30 for crushing is divided into _two disk pieces, a left half portion 30-1 and _a right half portion 30-2, about a dividing line L2 along the diameter line. Joining notches 30b and 30c are formed on both sides of the line L2, respectively, and notches 30d are formed on both sides of a diameter line L3 perpendicular to the dividing line L2 at positions shifted by 90 degrees from the notches 30b and 30c. , 30e are provided. Two female screw holes B' (total four) are formed in the cutouts 30b and 30c, and four female screw holes B' are formed in each of the cutouts 30d and 30e. It is

Then, the left half portion 30-1 and the right half portion 30-2 are fitted to the hexagonal prism rotating shaft 3b so that the shape of the hexagonal opening 30a at the center is matched, and _both left and right _half portions 30 ₁ and 302 _are joined along the parting line L2, projection pieces 34 and 34 as joint pieces are fitted into the notches 30b and 30c, respectively, and threaded holes of the projection pieces 34 and 34 are fitted. Four bolts B are screwed from the outside into the female screw holes B' and B' of the left _half portion 301 and the right _half portion 302 of the disk portion 30 through the projecting pieces 34 (FIG. 14). See), the disk 30 is configured to be attached to the rotating shaft 3b as one disk.

Further, projecting pieces 34, 34 identical to the projecting piece 34 are fitted into the notches 30d, 30e of the disk portion 30, and the bolt B is inserted into the projecting pieces 34, 34 from the outside of the screw holes of the projecting pieces 34, 34. By screwing into the female screw holes B', B' via 34, the two projecting pieces 34, 34 are configured to be fixed at positions shifted by 90 degrees from the projecting piece 34. As shown in FIG.

As shown in FIG. 14, the protruding pieces 34 are provided at four locations on the outer circumference of the crushing disk 8 at 90-degree intervals, and the outer peripheral surface of the protruding pieces 34 protrudes radially outward from the outer peripheral edge 8' of the disk 8. It is composed of a certain high-position surface 34a and a low-position surface 34b located at a position lower than the high-position surface 34a but projecting radially outward from the outer peripheral edge 8' of the disc 8. In FIG. The corner portions 8b, 8b in which the high position surfaces 34a face each other and are separated by 180 degrees, and the corner portions 8c, 8c in which the low position faces 34b face each other and are separated by 180 degrees. consists of

As described above, these four protruding pieces 34 are configured so that both the high position surface 34a and the low position surface 34b protrude from the outer peripheral edge 8' of the crushing disk 8, and the rotating shaft 3b By rotating around (the central axis P3 of the rotating shaft 3b) (for example, rotating in the opposite direction to the upper rotating shaft 3a), it has the function of crushing the raw material together with the upper crushing disk 7. .

The sleeve portion 31 has a cylindrical shape, and is provided with a shaft insertion opening 31a having a hexagonal columnar shape substantially identical to the hexagonal cross section of the rotating shaft 3b at the center thereof. In addition, six screw holes 32 are provided at intervals of 60 degrees in the circumferential direction around the central axis P3 in the end wall thickness 31' of the sleeve portion 31 on the side to which the crushing disk portion 30 is connected. On the other hand, also around the hexagonal opening 30a of the crushing disk 8, six screw holes 33 are formed through at positions corresponding to the screw holes 32 at intervals of 60 degrees in the circumferential direction. there is

Further, female screw holes 35 penetrating the shaft insertion opening 31a in the radial direction are provided at four locations at every 90 degrees on the outer peripheral surface of the sleeve portion 31. Four female screw holes 36 (see FIG. 21(b)) are provided at positions (four places) corresponding to the four female screw holes 35 where the fixing member 31 is fixed. Then, the sleeve portion 31 is inserted into the rotary shaft 3b through the shaft insertion opening 31a, positioned at the fixed position of the sleeve portion 31, and the female screw hole 35 and the female screw hole 36 are aligned, A bolt B is inserted into each of the female screw holes 35 from the outer periphery of the sleeve portion 31 and screwed. Then, the bolts B reach the female screw holes 36 of the rotary shaft 3b through the female screw holes 35 of the sleeve portion 31, so that the bolts B reach the rotary shaft 3b at the position of the rotary shaft 3b. The sleeve portion 31 can be fixed in the direction.

After that, the left half portion 30-1 and the right _half portion 30-2 of the disk portion 30 _are aligned so that the parting line L2 is joined at the position where the disk surface contacts the end portion 31' of the sleeve portion 31. Then, a bolt B is screwed into each female screw hole 33 from the side of the disk portion 30 to which the sleeve portion 31 is not attached, the tip of each bolt B is screwed into the female screw hole 32 of the sleeve portion 31, and the disk portion 30 is fixed to the sleeve portion 31 . With this configuration, the disk portion 30 and the sleeve portion 31 can be fixed to the rotary shaft 3b as the crushing disk 8. As shown in FIG.

Actually, as shown in FIG. 9, one crushing disc 8 is provided on one lower rotating roll 3 so that one crushing disc 8 is positioned at the position of the left and right center lines P3. is fixed (the sleeve part 31 is directed to the right), and with the sleeve part 31 facing outward (left side) , one sheet for crushing is placed near the center line P3 on the left side around the center line P3 in the horizontal direction. A disk 8 is fixed, and two crushing disks 8, 8 are fixed on the outer side thereof with the sleeve portions 31, 31 opposed to each other. The distance between the crushing discs 8, 8 is both T2 (for example, T2=200 mm).

Then, one crushing disc 8 is fixed with the sleeve portion 31 facing outward on the right side near the center line P3 centered on the center line P3 in the left - right direction, and further outside thereof, the sleeve portion Two crushing discs 8, 8 are fixed with the 31, 31 facing each other. The distance between the crushing discs 8, 8 is both T2.

When the lower crushing discs 8 are attached to the rotating shaft 3b, the leftmost disc 8 is in a state in which the protruding pieces 34 are positioned vertically and horizontally as shown in FIG. , the adjacent crushing disk 8 is fixed to the rotating shaft 3b in a state of being rotated in the direction of arrow E by the angle of one side of the rotating shaft 3b, that is, rotated in the direction of arrow E every 60 degrees. Therefore, the crushing discs 8 adjacent to the leftmost crushing disc 8 are fixed in a state rotated by 60 degrees in the direction of the arrow B, and finally, the seventh rightmost crushing disc 8 When viewed from the leftmost crushing disk 8 of the first sheet, it is configured to rotate 360 degrees and return to the original position (position shown in FIG. 14). As a result, the position of the projecting piece 34 changes in the axial direction of the rotating shaft 3b, so that the crushability of the raw material can be improved.

Next, the positional relationship between the upper rotating roll section 2A and the lower rotating roll section 3A shown in FIG. 6 will be described. As shown in FIGS. 5 and 6, the center axes P1 of the upper rotating rolls 2 are provided at positions 2 ₁ to 2 ₁₂ with an interval T3 (for example, T3=374 mm) from each other. The rotating roll 3 is provided at an intermediate position between the upper adjacent rotating rolls 2, 2, that is, for example, at an intermediate position between the upper rotating rolls 2 ₁ and 2 ₂ , that is, at the position of the rotating rolls 3 ₁ to 3 ₁₁ . (See Figure 6). The interval between the central axes P3 of the lower rotating rolls 3 is T4 (for example, T4=374 mm=T3) (see FIG. 6). Therefore, the distance T5 between the central axis P1 of the upper rotating roll 2 and the central axis P3 of the lower rotating roll 3 is, for example, 187 mm (T3/2) (see FIGS. 6 and 16).

Since FIG. 5 is a plan view of the oblique oblique housing 4 in a tilted state, it seems that the rotating shaft 3b in the lower stage is closer to the upstream side at the interval T3, but as shown in FIG. The rotating shaft 3b is positioned between the upper two rotating shafts 2b, 2b. A vertical distance T6 between the central axis P1 of the upper rotating roll 2 and the central axis P3 of the lower rotating roll 3 is, for example, 100 mm (see FIGS. 6 and 16).

As shown in FIGS. 5 and 19, the crushing disc 7 of the upper rotating roll 2 and the crushing disc 8 of the lower rotating roll 3 are two adjacent crushing discs in the upper stage when viewed from above. The crushing disk 8 of the lower rotating roll 3 is positioned at the intermediate position in the axial direction (lateral direction) of the disks 7, 7, and the upper and lower crushing disks 7, 8 are viewed from above. (see FIG. 19) and are configured to be spaced apart by an axial distance T7 (eg T7=100 mm).

Furthermore, when viewed from the side, as shown in FIGS. 6 and 16, the diameter of the crushing disk 8 in the lower stage is larger than the diameter of the crushing disk 7 in the upper stage. , 8 overlap at the periphery of the disc (see FIGS. 5, 6 and 19).

Specifically, as shown in FIGS. 6 and 16, the adjacent upper crushing discs 7, 7 partly overlap (overlap) the front and rear ends of the upper half of the lower crushing disc 8. It is configured to As a result, as shown in FIGS. 5 and 19, the upper rotating roll portion 2A and the lower rotating roll portion 3A rotate the upper rotating shaft 2b, the upper crushing disc 7 (including the sleeve portion 23), and the lower rotating roll. The shaft 3b and the lower crushing disk 8 (including the sleeve portion 31) form a space S (S1, S2) for passing from above the upper rotary roll portion 2A to below the lower rotary roll portion 3A. there is

When viewed from above (see FIGS. 5 and 19), this space S is a relatively large concave space S1 due to the overlapping of the upper crushing disk 7 and the lower crushing disk 8. and large, medium, and small rectangular spaces S2, and these spaces S1 and S2 function as sieve meshes. Further, these spaces (screen meshes) S1 and S2 (S) are not constituted by only one stage of rotating rolls pivotally supported at the same level position as in a conventional roll screen, but the upper stage rotating roll section 2A. and the upper and lower rotating roll portions 2A and 3A (the vertical distance between the central axes P1 and P3 is, for example, T6 = 100 mm, see FIGS. 6 and 16). It is characterized by its three-dimensional structure. Then, the material smaller than the space S1 or the space S2 (for example, 100 mm to 150 mm or less) is crushed by the upper crushing disk 7 and the lower crushing disk 8, and crushed to a size smaller than the space S1 or S2. A raw material (for example, 100 mm to 150 mm or less) is dropped and discharged downward through the sieve meshes S1 and S2.

Since the present invention is configured as described above, the operation of the present invention will now be described.
(basic behavior)
The multi-shaft crushing sieve apparatus 1 of the present invention is installed on the ground G as shown in FIG. shall be Further, the drive motors M1 and M2 of the upper rotary roll section 2A of the multi-shaft crushing sieve device 1 are driven, and as shown in FIG. ) at the same speed, and drive the drive motors M3 and M4 of the lower rotating roll section 3A to rotate the entire lower rotating roll 3 in the direction opposite to the direction of arrow C, as shown in FIG. (rotation direction from the downstream side to the upstream side) at the same speed (see pattern 1 in FIG. 20).

In this state, for example, construction-generated soil (earth and sand containing concrete masses, crushed stones, highly viscous soil masses, etc., hereinafter referred to as "raw materials") generated by civil engineering excavation work, etc., is thrown into the conveyer 16 (arrow D direction).

The raw material is fed from the tip roller 14 of the conveyer 16 to the upstream side of the hopper 6 through the raw material inlet 15a, and dropped onto the upper and lower rotary roll sections 2A and 3A. As for the amount of earth and sand to be put in, for example, as indicated by the earth and sand F indicated by the two-dot chain line in FIG. Note that the depth of the layer of earth and sand F in FIG. 3 is merely an example, and a lower layer may be possible.

Since each rotating roll 2 of the upper rotating roll 2A rotates in the direction of arrow C, and the upper crushing disk 7 also rotates in the direction of arrow C, the raw material moves in the direction of arrow C of the upper rotating roll section 2A. By rotation, it is conveyed from the upstream side to the downstream side, and raw materials smaller than the sizes of the screen meshes S1 and S2 (earth and sand with a diameter of about 100 mm to 150 mm or less, concrete chunks, crushed stones, etc.) are moved to the downstream side. In the process of (1), the sieves fall downward from the sieve meshes S1 and S2, pass through the lower chute 17, drop from the lower opening 17a onto the conveyor belt 16a of the lower conveyer 16, and are conveyed in the arrow A direction.

Further, since the rotating roll 3 of the lower rotating roll section 3A rotates in the opposite direction to the rotating roll 2 of the upper stage, it is possible to remove concrete lumps larger than the screen meshes S1 and S2, crushed stone, or the sieve having a high viscosity. Soil masses larger than S1 and S2 are moved downward by the action of the protrusions 24 in the process of being moved from the upstream side to the downstream side by the rotation of the protrusions 24 of the upper crushing disk 7 in the direction of arrow C. Since the crushing disk 8 of the lower rotating shaft 3b is positioned at the intermediate position between the adjacent crushing disks 7, 7 of the upper rotating shaft 2b, the protruding piece 34 of the lower crushing disk 8 is rotated in the direction of arrow E (opposite direction to the upper crushing disk 7), the large raw material that has moved downward is separated and divided into at least two or more, and drawn further downward, In this process, the raw material is finely crushed and dropped downward from the sieve meshes S1 and S2.

In this way, the material transferred downstream and downward by the rotation of the upper rotating roll 2 is separated from the upper crushing disk 7 and the lower crushing disk 7 which are rotated in opposite directions by the opposite direction rotation of the lower rotating roll 3. The crushing discs 7 and 8 are engaged in a state of being bitten downward, and the raw material (concrete mass, crushed stone, or , and highly viscous soil lumps) pass through the screen meshes S1 and S2 and fall downward from the lower rotating roll portion 3A.

At this time, the lower crushing disk 8 has projecting pieces 34 at four locations on its periphery, and the projecting pieces 34 rotate in the direction of arrow E opposite to the upper crushing disk 7. Therefore, the two protruding pieces 24 and 34 of the upper crushing disk 7 rotate in opposite directions (arrow C direction and arrow E direction), thereby crushing concrete lumps, Alternatively, even raw materials such as crushed stones are reliably crushed while drawing them downward. Since such a crushing operation is performed on the entire upper rotating roll section 2A and the lower rotating roll section 3A (whole surface or entire range) (see FIG. 5), the raw material is moved from the upstream side to the downstream side. In the process, regardless of the position on the upper and lower rotating roll portions 2A and 3A, the crushing operation can be performed evenly over the entire surface.

In addition, since such a crushing operation is performed from a deep portion of the earth and sand F forming the layer in the hopper 6, that is, from a portion near the upper rotary roll portion 2A, the crushing operation is performed gradually from a deep portion near the upper rotary roll portion 2A. is carried out, and in the process of being transferred from the upstream side to the downstream side, the raw material crushed smaller than the screen meshes S1 and S2 is dropped and supplied into the lower chute 17 below.

Therefore, even for the raw materials that have not been crushed on the upstream side, the upper crushing disc 7 and the lower crushing disc 7 and the lower crushing discs 7 and 8 are placed between the crushing discs 7 and 8 before being transferred to the downstream side. 8 can be crushed, and even if there is a lump of soil with particularly high viscosity, it can be crushed reliably before reaching the downstream side.

Further, even if concrete lumps or crushed stones are mixed in the earth and sand, they can be finely crushed by the crushing discs 7 and 8 as described above until they can pass through the sieve meshes S1 and S2. The crushed raw material (approximately 100 mm to 150 mm or less) crushed stone or the like can be dropped and supplied to the conveyer 16 below via the lower chute 17 . In this way, the raw materials falling on the lower chute 17 are raw materials with screen meshes S1, S2 or less, or fine raw materials crushed with screen meshes S1, S2 or less. can be transported to the collection point.

Crushed stones, concrete lumps, etc. larger than the sieve meshes S1 and S2, which cannot be crushed by the upper and lower crushing discs 7 and 8 until reaching the downstream, are crushed in the direction of the arrow C of the upper rotating roll portion 2A. is sent downstream by the rotation of the , is thrown into the discharge chute 10 through the discharge opening 9 and the discharge opening 10a (see FIG. 2), and discharged from the discharge port 10b. Then, in the vicinity of the exit of the discharge port 10b, it is possible to provide an accumulation part of large concrete lumps or crushed stones that are above the sieve, and another conveyer is provided below the discharge port 10b so that the It can be transported and provided with a sieve accumulator at the other locations mentioned above.

(opposite rotation operation)
Next, the six upper rotating rolls 2 ₁ to 2 ₆ on the upstream side are rotated in the direction of arrow C (from the upstream side to the downstream side) by the driving motor M1, and the six lower rotating rolls 3 ₁ on the upstream side are rotated. 3 ₆ are rotated in the direction opposite to the direction of arrow C (direction of arrow E) by drive motor M3, and the six upper rotating rolls 2 ₇ to 2 ₁₂ on the downstream side are rotated in the direction of arrow C' by drive motor M2. (Direction _opposite to _arrow C, that is, from the downstream side to the upstream side). ) (see FIG. 6 and FIG. 20 pattern 2). It should be noted that the rotation speed of each rotating roll is the same.

When the upper and lower rotary roll portions 2A and 3A are rotated in this manner, the six upper rotary rolls 2 ₁ to 2 ₆ on the upstream side and the six lower rotary rolls 3 ₁ to 3 ₆ on the upstream side , Crushing and sieving operations similar to the above basic operation are performed, but the six upper rotating rolls 2 ₇ to 2 ₁₂ on the downstream side and the five lower rotating rolls 3 ₇ to 3 ₁₁ on the downstream side are , the upper and lower rotating rolls 2A and 3A on the upstream side are rotated in opposite directions (directions of arrows C and C') and opposite directions (directions of arrows E and E') in which they are separated from each other. The raw material moved to the rotating rolls 2 ₇ to 2 ₁₂ area) does not immediately move to the discharge opening 10a, but stays in the downstream area (rotating rolls 2 ₇ to 2 ₁₂ area) for a relatively long time. operation is performed.

Then, the material that is not sufficiently crushed in the upstream area (the area of the rotating rolls 2 ₁ to 2 ₆ ) stays in the downstream area (the area of the rotating rolls 2 ₇ to 2 ₁₂ ), This is advantageous in that the crushing operation can be sufficiently performed in the downstream area.

That is, in the downstream area, since the upper rotating rolls 2 ₇ to 2 ₁₂ are rotating from the downstream side to the upstream side (direction of arrow C'), the material is transferred from the upstream side to the downstream side area. The raw material is slightly returned upstream by the crushing discs 7 of the rotary rolls 2 ₇ to 2 ₁₂ on the downstream side. During this time, the raw material returned to the upstream side is rotated in the direction opposite to the upper crushing disc 7 of the lower rotary rolls 3 ₇ to 3 ₁₁ adjacent to the upstream side (the direction of arrow E′). ), the raw material is conveyed downward while being crushed, and as a result, the raw material is crushed more finely and becomes a raw material smaller than the sieve meshes S1 and S2, and falls downward.

In addition, since the casing 4 is installed on a downward slope so that the upstream side is higher and the downstream side is lower, even if the casing 4 is slightly returned to the upstream side by the rotating rolls 2 ₆ to 2 ₁₂ on the downstream side, the Due to the downward slope, the raw material is gradually transferred downstream, and the raw material (concrete block, crushed stone, etc.) larger than the screen meshes S1 and S2 is thrown into the discharge chute 10 through the discharge opening 10a.

In this way, the upper rotating rolls 2 ₁ to 2 ₆ on the upstream side of the upper rotating roll section 2A and the upper rotating rolls 2 ₇ to 2 ₁₂ on the downstream side are rotated so as to face each other (in the direction of arrow C). and arrow C′ direction), the lower rotating rolls 3 ₁ to 3 ₆ on the upstream side are rotated in the opposite direction to the upper rotating rolls 2 ₁ to 2 ₆ (direction of arrow E), and the lower rotating roll 3 on the downstream side By rotating the rollers ₇ to 3 ₁₁ in the opposite direction to the upper rotating rolls 2 ₇ to 2 ₁₂ (direction of arrow E′), the raw material can be retained in the hopper 6 on the downstream side for a longer time. Therefore, it is possible to increase the crushing ratio (reduce the sieve discharged from the discharge opening 10a to the discharge chute 10) and crush the raw material more finely.

(Regarding the direction of rotation)
The rotation direction of the core motor of the present invention is not limited to the above-described rotation directions of the upper and lower rotating roll portions 2A and 3A (see patterns 1 and 2 in FIG. 20). Therefore, the upper rotating rolls 2 ₁ to 2 ₁₂ are driven to rotate in the direction of arrow C, and the lower rotating rolls 3 ₁ to 3 ₁₁ move in the same direction as the upper rotating rolls 2 ₁ to 2 ₁₂ (arrow E′ direction). (see pattern 3 in FIG. 20).

In addition, the rotating rolls 2 ₁ to 2 ₁₂ of the upper rotating roll section 2A are moved from the downstream side to the upstream side (arrow C′ direction, drive motors M1 and M2), and the rotating rolls 3 ₁ to 3 ₁₁ of the lower rotating roll section 3A are moved in the opposite direction. may be rotated from the upstream side to the downstream side (arrow E' direction, drive motors M3 and M4) (see pattern 4 in FIG. 20), or the upper upstream rotating rolls 2 ₁ to 2 ₆ may be rotated from the downstream side to the upstream side. side (direction of arrow C', drive motor M1), rotate the upper downstream side rotating rolls 2 ₇ to 2 ₁₂ from the upstream side to the downstream side (direction of arrow C, drive motor M2), and rotate the lower upstream side The rotating rolls 3 ₁ to 3 ₆ of the lower stage are rotated from the upstream side to the downstream side (in the direction of arrow E', drive motor M3), and the downstream rotating rolls 3 ₇ to 3 ₁₁ of the lower stage are rotated from the downstream side to the upstream side ( The direction of arrow E, drive motor M4) may also be configured (see pattern 5 in FIG. 20).

In any case, the rotation directions of the upper and lower rotating roll portions 2A and 3A can be independently driven by the four forward and reverse driving motors M1 to M4, so that patterns other than those shown in FIG. It is also conceivable to rotate in the rotational direction of .

(Regarding rotation speed)
In the above, the direction of rotation has been described, but since each of the drive motors M1 to M4 has an independent inverter control circuit m1 to m4, the upper upstream rotating rolls 2 ₁ to 2 ₆ and the downstream rotating rolls 2 1 to 2 6 It is possible to independently control the rotational speed of each of the rolls 2 ₇ to 2 ₁₂ , the lower upstream rotating rolls 3 ₁ to 3 ₆ , and the downstream rotating rolls 3 ₇ to 3 ₁₁ .

For example, in the rotation direction of pattern 2 of FIG. The crushing of can be promoted more.

In this way, by independently changing the rotational speeds of the drive motors M1 to M4, it is possible to obtain effects such as acceleration of crushing.

(Mixing operation with soil conditioner)
In this case, pattern 2 in FIG. 20, that is, the upper rotating roll portion 2A (2 ₁ to 2 ₆ ) on the upstream side rotates in the direction of arrow C (rotating from the upstream side to the downstream side), The portion 2A (2 ₇ to 2 ₁₂ ) rotates in the direction of arrow C′ (opposing direction), and the lower rotating roll portion 3A (3 ₁ to 3 ₆ ) on the upstream side rotates in the direction of arrow E (with the upper rotating roll is rotating in the opposite direction), and the lower rotating roll section 3A (3 ₇ to 3 ₁₁ ) on the downstream side rotates in the direction of arrow E' (rotating in the opposite direction to the upper rotating roll).

A soil conditioner hopper 37 is provided above the upstream side of the conveyer 16, and the soil conditioner is put into the earth and sand conveyed on the conveyer 16. - 特許庁In this case, the conveyer 16 feeds the earth and sand and the soil conditioner into the hopper 6 at the same time. As the soil conditioner, for example, a solidification agent (lime, etc.) can be considered.

After that, the earth and sand thrown into the hopper 6 fall downward from the screen meshes S1 and S2 while the highly viscous earth and sand are crushed by the same operation as the above (counter-rotating operation). At this time, as described above, since the upper crushing disk 7 and the lower crushing disk 8 are rotating in opposite directions, both the disks 7 and 8 bite into highly viscous earth and sand. When the discs 7 and 8 rotate oppositely while crushing the earth and sand, the earth and sand are mixed with the soil conditioner, and in this state, the soil and sand fall downward from the sieve meshes S1 and S2.

Since the mixing operation is performed in the entire range (entire range) of the upper and lower rotary roll sections 2A and 3A, the earth and sand and the soil conditioner are evenly mixed in the entire range of the upper and lower rotary roll sections 2A and 3A. Good-quality improved soil in which the soil conditioner and soil are evenly mixed is dropped and supplied from the lower opening 17a of the lower chute 17 to the conveyer 16 below. Therefore, by transporting the improved soil by the transport conveyor 16, the improved soil of good quality can be accumulated at the accumulation location.

Even during this mixing operation, raw materials such as concrete lumps or crushed stones larger than the meshes S1 and S2 are conveyed downstream and can be discharged into the discharge chute 10 from the discharge opening 10a. Therefore, the sieving operation can be performed even during the mixing operation with the soil conditioner.

In addition, concrete lumps, crushed stones, etc. are crushed mixed with the improved soil, and the concrete lumps, crushed stones, etc. (100 mm to 150 mm or less) that have passed through the sieve meshes S1 and S2 are dropped onto the conveyer 16 together with the improved soil. After that, the soil is sieved again to remove concrete lumps, crushed stones, etc., thereby obtaining improved soil of good quality.

As described above, according to the present invention, while the raw material is crushed by the upper and lower crushing discs 7 and 8 arranged over the upper and lower rotating rolls 2 and 3, the raw material smaller than the sieve meshes S1 and S2 (under sieve) is crushed. is discharged downward from the lower chute 17, and the raw material (over the sieve) larger than the screen meshes S1 and S2 can be discharged from the discharge chute 10 on the downstream side, and the crushing operation of the raw material and the sieving operation can be performed simultaneously. .

In addition, since the upper and lower crushing discs 7 and 8 are arranged to overlap each other, for example, by rotating the adjacent upper and lower crushing discs 7 and 8 in opposite directions, the raw material is separated into narrow meshes S1. , S2, and the efficiency of crushing can be improved.

In addition, since the projecting pieces 24 and 34 are provided on the outside of the crushing discs 7 and 8, for example, by rotating the upper and lower crushing discs in opposite directions, the raw material is sieved into a narrow sieve by the projecting pieces of each disc. It becomes easy to pull into (space), and the crushing efficiency of raw materials can be improved more.

Further, by making the diameter of the lower crushing disc 8 larger than that of the upper crushing disc 7, the outer circumferences of the upper and lower crushing discs are easily overlapped, and the crushing efficiency can be enhanced.

In addition, the material can be continuously fed into the hopper 6 by the conveyer 16, and the material below the sieve can be continuously conveyed by the conveyer 16 below the lower chute 17.

Further, by making the rotation directions of the rotary rolls 2 and 3 opposite on the upstream side and the downstream side, for example, the crushing efficiency can be further improved.

Further, since the rotating shafts 2b and 3b of the rotating rolls 2 and 3 are configured to have polygonal cross sections, the crushing discs 7 and 8 and the rotating shafts can be easily fixed.

Further, since the crushing discs 7 and 8 are composed of two divided disc pieces, the crushing discs 7 and 8 can be easily attached to the rotating shafts 2b and 3b, and the center axis of the rotating shaft can be easily adjusted. A crushing disc that does not rotate about can be easily constructed.

In addition, the operation of crushing the raw material, the operation of sieving, and the operation of mixing the earth and sand with the soil conditioner can be performed at the same time.

In addition, a group of rotating rolls 2 (2 ₁ to 2 ₆ ) on the upstream side of the upper stage, a group of rotating rolls 2 (2 ₇ to 2 ₁₂ ) on the downstream side of the upper stage, a group of rotating rolls 3 (3 ₁ to 3 ₆ ) and a group of rotating rolls 3 ( 3 ₇ to 3 ₁₁ ) on the downstream side of the lower stage can be independently controlled in rotation direction and/or rotation speed. It is possible to set the direction of rotation and/or the speed of rotation.

2, reference numeral 6e denotes a reinforcing rod of the hopper 6, and FIG. 19 is an enlarged view of the area (N) (the second area from the downstream side to the upstream side) inside the housing 4 in FIG. The rotary shafts 2b and 3b are made of metal, the crushing discs 7 and 8 are made of metal and ceramic materials having high abrasion resistance, and the projecting pieces 24 and 34 are made of cemented carbide and the like with high abrasion resistance and hardness. It can be configured by Further, since the protruding pieces 24 and 34 are fixed to the disc portion with bolts B, they can be replaced as needed when they are damaged, which is excellent in maintainability.

INDUSTRIAL APPLICABILITY According to the multi-shaft crushing sieve apparatus according to the present invention, a single apparatus can perform crushing operation of earth and sand, sieving operation, and soil improvement operation, and is highly practically effective.

1 Multi-shaft crushing screen device 2 Rotating rolls _{2 1-2 12} -rotating rolls 2a 1-2a ₁₂ -driving pulley 2b Rotating shaft 2A Upper rotating roll section 3 Rotating rolls _{3 1-3 11} -rotating rolls 3a 1-3a ₁₁ -driving Pulley 3b Rotating shaft 3A Lower rotating roll 4 Case 4a, 4b Side plate 4d Upper opening 4e Lower opening 5 Machine frame 6 Hopper 7 Crushing disk 8 Crushing disk 10 Discharge chute 16 Conveyor 17 Lower chute 21a, 21b Bearing 22 Disk portion 22a Opening 22 ₁ Left half portion 22 ₂ Right half portion 23a Shaft insertion opening 24 Protruding pieces 28a, 28b Bearing 30 Disk portion 30 ₁ Left half portion 30 ₂ Right half portion 30a Opening 31a Shaft insertion opening 34 Protruding piece S1, S2 Screen meshes M1 to M4 Drive motors L1, L2 Parting lines m1 to m4 Inverter control circuit

Claims (6)

An upper rotating roll section consisting of a plurality of rotating rolls pivotally supported by left and right side plate sections at predetermined intervals in a direction orthogonal to the direction of movement of the raw material, and an upper rotating roll section at a position lower than the upper rotating roll section. A downwardly sloping casing provided with a lower rotating roll portion composed of a plurality of rotating rolls pivotally supported by the left and right side plate portions in parallel with the rotating rolls with a predetermined interval on the machine frame,
The rotating rolls in the lower stage are arranged in a plane so as to be positioned between the adjacent rotating rolls in the upper stage,
A plurality of crushing discs are axially fixed to each of the upper and lower rotating rolls,
the crushing discs of the lower rotating roll are axially arranged so as to be positioned between the two crushing discs of the upper rotating roll;
The gaps between the adjacent rotating rolls in the upper and lower stages and between the crushing discs in the upper and lower stages are configured as sieve meshes,
An upper roller driving means for rotating and driving the upper rotating rolls, and a lower roller driving means for rotating and driving the lower rotating rolls independently from the upper rotating rolls are provided,
A hopper for feeding raw materials is provided at the upper opening of the housing, and a lower chute below the sieve is provided at the lower opening of the housing,
A multi-shaft crushing and sieve device in which a side plate on the downstream side of the housing is provided with a sieve discharge chute,
The upper roller drive means includes a group of drive pulleys for rotationally driving the group of upper rotating rolls on the upstream side, and a first upper roller drive means configured by a drive belt for rotationally driving the group of drive pulleys; A second upper roller driving means composed of a remaining group of driving pulleys for rotationally driving the remaining group of upper rotating rolls on the downstream side and a driving belt for rotationally driving the remaining group of driving pulleys. ,
The lower roller drive means includes a group of drive pulleys for rotationally driving the group of lower rotary rolls on the upstream side, and a first lower roller drive means configured by a drive belt for rotationally driving the group of drive pulleys; A second lower roller driving means composed of a remaining group of drive pulleys for rotationally driving the remaining group of lower rotating rolls on the downstream side and a drive belt for rotationally driving the remaining group of drive pulleys. and
The first and second upper roller drive means are provided with independent drive motors and inverter control means, respectively. Alternatively, it is configured so that the rotation speed can be independently controlled,
The first and second lower roller drive means are provided with independent drive motors and inverter control means, respectively. Alternatively, a multi-screw crushing and sieving device configured so that the rotation speed can be independently controlled . 2. The multi-shaft crushing sieve apparatus according to claim 1, wherein the upper crushing disc and the lower crushing disc adjacent to the crushing disc overlap each other at their outer peripheral portions. Each of the crushing discs of the upper and lower rotating rolls is provided with a plurality of protruding pieces on each outer peripheral portion ,
The rotating shafts of the rotating rolls in the upper and lower stages are each configured in a bar shape with a polygonal cross section,
An insertion opening having a polygonal cross-section similar to the polygonal cross-section of the rotating shaft is provided at the center of the upper and lower crushing disks, and the crushing disk is attached to the rotating shaft through the insertion opening. and
The upper and lower crushing disks are composed of two disk pieces divided along a dividing line along the diameter line, and the two disk pieces are joined by aligning the insertion opening with the rotating shaft, 3. A multi-shaft crushing sieve apparatus according to claim 1 or 2 , wherein said protruding pieces are configured to join both disk pieces . 4. The multi-shaft crushing screen apparatus according to any one of claims 1 to 3, wherein the diameter of the crushing disk of the lower rotating roll is larger than the diameter of the crushing disk of the upper rotating roll. Claims 1 to 1, wherein a conveyer is provided upstream of the hopper for charging the raw material into the hopper, and a conveyer is provided below the lower chute for conveying the raw material under the sieves. 5. The multi-shaft crusher and sieve device according to any one of 4. configured to put a soil conditioner together with the raw material into the hopper,
The multi-shaft according to any one of claims 1 to 5, wherein the raw material and the soil conditioner can be mixed in the process of crushing the raw material with the upper and lower crushing discs. Type crushing screen device.

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