JP2001025956A - Chamfering device of rock and manufacture of chamfered rock - Google Patents

Abstract

PROBLEM TO BE SOLVED: To manufacture a round stone-like rock by stirring a rock within a drum by the rotation of the drum, moving the rock toward a discharge port while rounding the angular part of the rock, and discharging the rock from the discharge port. SOLUTION: An original stone 61 is scooped by a power shovel 51 and put in a shoot 71, whereby the original stone 61 is supplied into a drum 21 through an opening formed on a blocking plate 73 and feed port. The rock is stirred in the drum 21 by the rotation of the drum 21 and moved toward a discharge port while rounding the angular part of the rock. More specifically, the original stone (rock) 61 supplied into the drum 21 is stirred by the rotation of the drum 21, whereby a collision or friction is generated between the rocks or between the rock and the drum inner wall, and the sharp angles of the rock are broken or worn, whereby the angular rock can be rounded. The rock stirred and moved toward the discharge port while rounding the angular part is fallen from the discharge port.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for squaring rock and a method for producing horned rock, and more particularly to
The present invention relates to a device for rounding a sharp-pointed rock such as a split stone and a method for producing a boulder-like rock by rounding a corner of a sharp-pointed rock such as a split stone.

[0002]

2. Description of the Related Art Rocks having a rounded shape without sharp corners are called "cobble stones" and are used for many purposes such as being piled up or paved for river or coastal revetment. Having. Until now, this boulder has been obtained by collecting things existing in riverbeds and the like, or by sorting boulders from rocks collected from mountains and the like.

[0003]

However, the method of collecting materials present in riverbeds, etc., has a problem that the amount of cobblestones present in riverbeds, etc., is small and cannot be sufficient by itself. There is also a problem that the natural environment such as a riverbed is destroyed by collecting cobblestones from the river. On the other hand, in the case of sorting boulders from rocks collected from mountains, etc., the yield of the selected boulders is low with respect to the whole collected rocks, and a large amount of unusable rocks is generated to secure the required amount of boulders There was a problem of doing.

Therefore, in the present invention, a device for rounding a sharp-pointed rock such as a split stone obtained by breaking a megalith, and a rounding-off method for a sharp-pointed rock such as the split stone are disclosed. It is an object of the present invention to provide a method for producing a cobble-like rock.

[0005]

Means for Solving the Problems An apparatus for rounding a corner of a rock having a sharp edge according to the present invention (hereinafter referred to as "the present apparatus").
Is a cylindrical drum having a supply port on one end side and a discharge port on the other end side, supporting means for rotatably supporting the drum around a predetermined drum rotation axis, and And a rotating means for rotating the rock around the rock. According to this device, rock with sharp corners (rough stone)
Is supplied to one end side of the inside of the drum being rotated by the rotating means, and the rock is stirred inside the drum by the rotation of the drum, and the rock is moved toward the discharge port while rounding the corner of the rock. Discharging the rock from the outlet. When a large number of rocks are stirred inside the drum, collision or friction occurs between the rocks or between the rock and the drum inner wall,
The sharp corners of the rock can be rounded by breaking (falling out) or abrading the sharp corners of the rock. Further, while receiving the raw stone from the supply port provided in the drum, the rounded rock can be discharged from the discharge port provided separately from the supply port while receiving the raw stone from the drum. Rounding processing (hereinafter simply referred to as “processing”)
Can be performed continuously. Therefore, the processing is not interrupted by the raw material charging step or the product discharging step unlike the batch operation. Cobblestone-like rock can be efficiently and inexpensively manufactured by a device having a simple configuration including a drum, a supporting means, and a rotating means.

[0006] The movement of the rock toward the discharge port is such that the rock supplied to the supply port pushes the rock existing inside the drum toward the discharge port or is formed on the inner surface of the drum. This may be caused by the inclination that the discharge port side is lower than the supply port side. In the former case, by adjusting the amount of the supplied rock, the moving speed of the rock toward the discharge port is adjusted to adjust the residence time of the rock in the drum, and the angle of the sharp rock is determined. The degree of rounding can be freely changed. In the latter case, since the rock naturally moves toward the discharge port due to the inclination, the supplied rock pushes the rock existing inside the drum toward the discharge port to move the supplied rock. There is no need to push the inside of the drum, and there is no need for a mechanism to push the rocks inside the drum. The inclination may be formed by any method.For example, when the drum rotation axis is inclined with respect to the horizontal direction, or even when the drum rotation axis is horizontal, the drum inner wall is positioned from the supply port side. For example, a case where the pressure is lowered toward the discharge port side (for example, a case where the drum is shaped like a truncated cone) and a combination of these two cases can be exemplified.

The drum can be used without any particular limitation as long as it has a cylindrical shape having a supply port at one end and a discharge port at the other end. The shape of the drum cylinder may be any shape as long as the rock can flow from the supply port on one end side to the discharge port on the other end through the internal space, for example, a triangular cylinder, a square cylinder , Pentagonal, hexagonal, heptagonal, octagonal, nine-sided, ten-sided, eleven-sided, twelve-sided, polygonal, cylindrical, elliptical, semi-cylindrical, frustoconical, and these And the like. However, it is preferable to use a cylindrical shape in terms of smooth rotation of the drum, improvement of the drum strength, and ease of manufacturing the drum. Note that the cylindrical portion is not necessarily the entirety of the cylinder formed by the drum, but may be a portion from the supply port to the discharge port. The inner diameter and length of the drum determine the amount of processing and the degree of processing per unit time, and are appropriately determined in consideration of the desired amount of processing, the degree of processing, the type of rock to be processed, the rotational speed of the drum, and the like. I just need.

[0008] The support means rotatably supports the drum around a predetermined drum rotation axis. Here, the “predetermined drum rotation axis” is such that a line (intersecting line) formed at a position where a plane perpendicular to the drum rotation axis and the inner surface of the cylinder formed by the drum intersect becomes a closed curve. Refers to an arbitrary straight line. The supporting means may be any means as long as it can support the drum so as to be rotatable around the drum rotation axis, and may use a bearing or a part of the drum as a liquid (for example, water). Or a sprocket attached to a drum such that the chain is engaged with a sprocket rotatably supported above the drum and the rotation axis of the drum is used as the rotation axis. Can be exemplified.

The rotating means may be of any type as long as it rotates the drum around the drum rotating shaft at a required rotational speed for a required time. , Gears, belts,
What is necessary is just to comprise so that a drum may be rotated using a power transmission mechanism, such as a drive shaft and a roller, Since these are well-known, description is abbreviate | omitted here. If the rotation speed of the drum is too low, a sufficient processing effect cannot be obtained.On the contrary, if it is too high, the rock is pressed against the inner wall of the drum due to centrifugal force and does not move, and the processing effect is reduced or the rotation power is significantly increased. . For this reason, it is preferable that both of these conditions be satisfied. The diameter and the length of the drum, the type of rock, the desired degree of treatment, the amount of treated rock, and the like may be appropriately determined. As the number of rotations per minute,
It is preferably at least 0.5 rotation, more preferably at least 1.0 rotation, most preferably at least 1.5 rotation, preferably at most 30 rotations, more preferably at most 20 rotations, most preferably at most 10 rotations. . Various driving means can be used. For example, electric motors driven by various power sources (for example, commercial power sources, solar cells, etc.), water turbines driven by hydraulic power, internal combustion engines, animals such as cattle and humans Can be exemplified. The present device may be installed in a place where a commercial power source is not available, such as a mountain, and in such a case, an internal combustion engine can be used.

[0010] A projection may be formed on the inner surface of the drum. Here, the "inner surface" of the drum
It refers to the inner wall of the drum that defines an internal space from a supply port on one end side of the cylindrical drum to a discharge port on the other end side. If a convex portion is formed on the inner surface, the rock charged in the internal space is sufficiently stirred by the rotation of the drum, and the rock is rounded off. That is, the rock inserted into the internal space of the drum is caught by the convex portion and moves along the inner surface to cause friction with other rocks, or is caught by the convex portion and moves upward along the inner surface. Since the corners are rounded off by being pulled up from a certain height and falling down from a certain height, the present device can more remarkably exhibit the effect of rounding off the rocks. The projections can also prevent the rock from directly hitting the inner surface of the drum, and in such a case, damage to the inner surface of the drum, which can be caused by the direct impact of the rock, can be prevented.

When a convex portion is formed on the inner surface of the drum, the convex portion may be formed along a direction substantially parallel to the drum rotation axis. In this way, the drum is rotated around the drum rotation axis, so that a convex portion is formed along a direction substantially parallel to the drum rotation axis, so that the rock loaded in the internal space has a convex portion. Therefore, as described above, the present device can exhibit the effect of rounding and rounding a rock more remarkably. In addition, since the rock loaded in the internal space of the drum can move smoothly, for example, by sliding in the direction of the rotation axis of the drum, the rock in the internal space of the drum can be moved toward the discharge port. This device can be operated smoothly without hindrance. When the protruding portion is formed on the inner surface of the drum along a direction substantially parallel to the drum rotation axis, all or a part of the protruding portion may have a plate-like shape. By making the tip of the convex part plate-like, the plate-like part scrapes up the rocks well and agitates, causing friction between the rocks inserted into the internal space, and pulling up by the convex parts The rock is sharpened and rounded by falling downward. Since the tip of the convex portion is a normal plate material, the plate material itself is inexpensive and has a simple flat plate structure, so that installation work can be easily performed. Even if the tip of the projection is worn or damaged due to friction or collision, the tip of the projection can be repaired at low cost and the maintenance cost of the present apparatus can be kept low.

[0012] A dam portion for damming a rock may be provided on the other end side of the drum. By doing so, a certain amount of rock will stay in the inner space of the drum, so that the rock can be stirred by the rotation of the drum to secure the friction between the rocks, and this device rounds the corner of the rock The effect can be more remarkably exhibited. The weir portion is not particularly limited as long as a desired amount of rock can be retained inside the drum, and may be any. The bottom surface of the large diameter side is directed to the one end side (that is, the supply port side). It may be a frustoconical cylinder arranged so that its axis is substantially parallel to the drum rotation axis. By doing so, an amount of rock substantially corresponding to the difference in radius between the bottom surface on the small diameter side and the bottom surface on the large diameter side of the frustoconical cylinder stays inside the drum. Further, in such a case, the drum rotating shaft passes through the discharge port, and the weir portion has a large-diameter side bottom surface directed to the one end side and aligns the shaft with the drum rotating shaft on the same straight line. It may be a frustoconical cylinder arranged so as to exist. In this case, the distance between the drum rotation shaft on which the drum is rotated and the inner edge on the small diameter side of the frustoconical cylinder from which the rock is discharged,
Since it does not change with the rotation of the drum and remains constant, rocks of the same nature are always discharged without being affected by the rotation of the drum.
Here, "disposing the axis so as to be on the same straight line as the drum rotation axis" includes "disposing the axis so as to be substantially parallel to the drum rotation axis". .

[0013] The apparatus may further include a supply means for supplying the ore to the inside of the drum via the supply port. The supply means may be any as long as it guides the ore to the inside of the drum via the supply port, and is used to load the ore (rock) into the drum from the supply port located at one end of the drum. (For example, a belt conveyor, a bucket conveyor, and the like), a chute, and the like. The entire edge of the one end side of the drum is substantially in contact with a plane perpendicular to the drum rotation axis, and the supply unit has a main surface perpendicular to the drum rotation axis. A closing plate for closing the supply port on the one end side of the drum with the main surface, the closing plate having an opening formed to communicate with the supply port. By doing so, the supply port on the one end side of the drum is closed by the closing plate having a simple structure having a main surface perpendicular to the drum rotation axis, so that the rock existing inside the drum flows backward from the supply port. And the dust inside the drum flowing out of the supply port can be reduced. The ore can be supplied to the supply port of the drum via the opening formed in the closing plate. In addition, "blocking the supply port on one end side of the drum with the main surface (of the closing plate)" means that the ore does not almost spill from between the edge on the one end side of the drum and the main surface (of the closing plate). This includes not only the case where the edge and the main surface are in sliding contact with each other, but also the case where there is a gap between the edge and the main surface such that the ore does not almost spill (the ore does not substantially spill). Means that the gemstone does not spill out enough to interfere with the operation of the device,
It means that the gap is narrower than the weight average diameter of the supplied rough stone. For example, the ratio of the gap to the weight average diameter is 9
0% or less, preferably 80% or less, more preferably 70% or less, and most preferably 60% or less. ). And, the opening “communicates with the supply port” is not only when the opening is always in communication with the supply port even when the drum rotates, but also can supply the rough to the supply port to the extent that the present apparatus can be operated. The degree includes the case where the opening communicates with the supply port only at a part of the rotational position of the drum.

When the supply means has the closing plate,
The supply means may further include a chute communicating with the opening formed in the closing plate. The opening is formed in a plate-shaped closing plate, and it may be difficult to insert a rough stone into the opening. Even in such a case, by having a chute communicating with the opening,
The rough can be easily and reliably supplied to the opening via the chute and loaded into the drum. The inner surface of the chute may have a cushioning material attached to at least a part of the lower surface. Since the rough falls down or the rough collides with the inner surface of the chute, the chute is likely to generate vibration and noise, and the inner surface of the chute is easily damaged. In order to prevent such vibration and noise and damage to the inner surface of the chute, a cushioning material may be attached to at least a part of the lower surface of the inner surface of the chute. Here, the reason why the rough surface is at least the lower surface is that the rough stone is pulled downward by gravity, so that the rough stone violently hits the lower surface or the rough stone rubs strongly against the lower surface. The buffer material is particularly effective when the rough is thrown into the chute and is attached to a portion where the thrown rough collides with the inner surface of the chute. In addition, as the cushioning material, any material can be used as long as it can withstand the collision and friction of the rough stone and relieve the impact of the collision of the rough stone, and a rubber sheet, a urethane plate, a cloth, and the like are exemplified. Can be.

[0015] The supporting means is a circular ring-shaped ring portion formed on the drum and having the drum rotation axis as its axis;
A roller member arranged to abut the outer surface of the ring portion so as to support the drum so that the rotation axis is substantially parallel to the drum rotation axis. By doing so, the roller is brought into contact with the ring portion to support the drum, so that the weight of the drum (including the weight of the rock existing inside) can be sufficiently dispersed and supported by a relatively large contact area, The structure of the support means can be simplified. Here, the ring portion is not necessarily provided separately from the drum, but may be provided integrally with the drum, and a part of the outer surface of the drum may be used as the ring portion. As the roller member, any member can be used as long as it can contact the outer surface of the ring portion and carry the drum, for example, various shapes such as a column, a sphere, a truncated cone, and a cone. A roller can be exemplified. The point that noise and vibration can be reduced, the point that the drum can rotate even if pebbles etc. are sandwiched between the ring part and the roller member, and even if there is some manufacturing error or mounting error of the ring part From the viewpoint of permitting the rotation of the drum, the portion of the roller member that comes into contact with the ring portion may be formed of a somewhat flexible material, such as a rubber material or a resin material. In particular, if the roller member is a rubber tire, the elasticity of the internal compressed gas (air) is applied in addition to the elasticity of the rubber, so that the noise and vibration are reduced as described above, and the drum is allowed to rotate smoothly. It is preferred. The ring portion and the roller member may have peaks and valleys like a gear so as to mesh with each other.

When the supporting means has the ring portion and the roller member, the rotating means may drive all or a part of the roller member by a driving means. By doing so, the supporting means and the rotating means are partially shared, and the number of components can be reduced as compared with the case where both means are independently provided, so that the manufacturing cost of the apparatus can be reduced. As the driving means, various means can be used. As described above, for example, an electric motor driven by various power sources (for example, a commercial power source, a solar cell or the like), a water wheel driven by hydraulic power, an internal combustion engine, The power of animals such as cows and humans can be exemplified. This device may be installed in a place where a commercial power supply cannot be used, such as in a mountain, and in such a case, an internal combustion engine or the like may be used.

The present apparatus may have a humidifying means for humidifying the inside of the drum. Inside the drum, the rock is agitated, and the sharp corners of the rock are damaged (dropped) or abraded, resulting in dust and / or rough particles generated when the sharp corners of the rock are rounded off. There is a case where the dust charged in the apparatus may scatter around the apparatus. The inside of the drum may be humidified by humidifying means so that the dust is not scattered. As the humidifying means, a water spray nozzle disposed inside the drum, the inside of the drum through the rock, such as spraying water on the rock loaded in the device or passing the rock through a water bath. Examples include a humidifier, a sprayer that sprays water into the drum via the outlet, and the like. In particular, if the water spray into the inside of the drum via the discharge port is used as the humidifying means, the amount of dust generated by stirring the rock is larger near the discharge port. Therefore, the amount of dust generated by the process is often closer to the discharge port), and it is possible to directly humidify the position where the amount of dust is large, and it is possible to effectively prevent the scattering of dust.

According to the method of the present invention for producing rounded rocks (hereinafter referred to as "the present method"), a cylindrical drum having a supply port at one end and a discharge port at the other end is provided with a predetermined drum. A rotation step of rotating around a rotation axis; a supply step of supplying rock to the inside of the drum via the supply port; and a rotation of the drum agitates the rock inside the drum to form a corner of the rock. And a step of discharging the rock from the discharge port while stirring the rock toward the discharge port while rolling. According to the method, a rock having a sharp corner (ore) is supplied to one end side (via the supply port) of the inside of the drum being rotated in the rotating step in the supplying step, and the rock of the drum is supplied in the stirring step. The rock is stirred inside the drum by the rotation, and the rock is moved toward the discharge port while rounding the corner of the rock, and the rock is discharged from the discharge port in the discharge step, so that the sharp-pointed rock Corners can be rounded. When a large number of rocks are agitated inside the drum, collision or friction occurs between the rocks or between the rock and the inner wall of the drum, and the sharp corners of the rocks are damaged (dropped) or abraded, resulting in corners. You can round off the corners of the pointed rock. In other words, the corners of the rock with sharp corners can be rounded by a simple method having a rotating step, a feeding step, a stirring step, and a discharging step,
Cobble-like rock can be produced efficiently and at low cost. Note that this method is a so-called continuous operation in which four steps of a rotation step, a supply step, a stirring step, and a discharge step proceed simultaneously. The batch operation does not require a raw material charging step or a product discharging step, and a process management. Can be easily performed, and the amount of production per unit time can be increased, so that boulder-like rocks can be produced more efficiently and inexpensively.

[0019] The movement of the rock toward the discharge port in the stirring step of the method is caused by the rock supplied in the supply step pushing the rock existing inside the drum toward the discharge port. There may be. In this way, by adjusting the amount of rock supplied in the supplying step, the moving speed of the rock toward the discharge port is adjusted to adjust the residence time of the rock in the drum in the stirring step, The degree to which the corners of rocks with sharp corners are rounded can be freely changed.

The movement of the rock toward the discharge port in the stirring step of the method is caused by a slope formed on the inner surface of the drum, the slope being lower on the discharge port side than on the supply port side. There may be. In this way, the rock naturally moves toward the discharge port due to the inclination, so that the rock supplied in the supply step is so supplied that the rock existing inside the drum is pushed toward the discharge port and moved. It is not necessary to push rocks into the drum, and there is no need for a mechanism to push rocks into the drum in the supplying step. The inclination may be formed by any method.For example, when the drum rotation axis is inclined with respect to the horizontal direction, or even when the drum rotation axis is horizontal, the drum inner wall is positioned from the supply port side. When it is lowered toward the discharge port side (for example, when the drum is shaped like a truncated cone),
And the combination etc. of these two cases can be illustrated.

[0021]

Embodiments of the present invention will be described below with reference to the drawings. However, the present invention is not limited by these.

FIG. 1 is a front view showing the present apparatus 11 according to one embodiment, and FIG. 2 is a left side view of the present apparatus 11 shown in FIG. 1 (as viewed from the direction of arrow A in FIG. 1). ing)
FIG. 3 is a sectional view taken along line BB of FIG. 2, and FIG.
FIG. 2 is a CC end view of FIG. 1. The apparatus 11 will be described with reference to FIGS. The back surface of the device 11 has the same structure as that of FIG. 1 (it is plane-symmetric with FIG. 1).

The apparatus 11 includes a cylindrical drum 21 (in this embodiment, a drum body 24 excluding a weir 25 described later is cylindrical) and a rubber pneumatic tire 33 serving as a roller member.
And a frame 35 for rotatably supporting the tire 33 at a predetermined position, and a tire 33d receiving rotational power of an internal combustion engine (diesel engine for trailer) not shown.
It has a gear box 41 for rotating 33e, a chute 71 for receiving a rough stone 61 from a power shovel 51, a closing plate 73 to which the chute 71 is attached, belt conveyors 81 and 83, and a water spray nozzle 91 as a humidifying means. .

The drum 21 has a supply port 22 at one end and a discharge port 23 at the other end. The drum 21 has a drum main body 24 and a weir 25. The drum main body 24 has a shape of a straight cylinder having a length of about 9 m (a shape obtained by cutting a straight cylinder having a central axis common and having a smaller diameter and an equal height from a straight cylinder). The shaft is rotated about the axis of the right cylinder, which substantially belongs to the horizontal plane. That is, in the present embodiment, the straight cylindrical shaft formed by the drum main body 24 is the “predetermined drum rotation shaft” in the present specification. The weir portion 25 is for blocking the rock existing inside the drum 21 on the discharge port 23 side (the other end side), and has a frusto-conical cylinder (the inside of the frusto-conical trough parallel to the side surface of the frusto-cone). (The rest is a truncated right truncated cone cut by the surface that exists in the shape.) The frusto-conical cylinder has a large-diameter bottom surface directed to one end side (supply port 22 side) of the drum 21 and its axis is on the same straight line as the axis of a straight cylinder formed by the drum body 24 (predetermined drum rotation axis). It is arranged to almost exist.
The outer diameter and the inner diameter of the bottom surface on the large diameter side are substantially the same as the outer diameter and the inner diameter of the drum body 24, respectively. In the present embodiment, the inside diameter of the bottom surface on the large diameter side is approximately 2.7 m, and the inside diameter of the bottom surface (which is the discharge port 23) on the small diameter side of the frustoconical cylinder is approximately 1.2 m. Have been.

A protrusion 26 is formed on the inner surface of the drum 21. In particular, the protrusion 26 will be described with reference to FIG. The convex portion is an equilateral angle steel 26a in which both ends of the angle are attached (welded) to the inner peripheral surface 24r of the drum main body 24.
And a plate-like member 26b attached to the equilateral angle steel 26a so as to be closer to the center of the drum body 24 from the angled top of the equal angle angle steel 26a. Part of the convex portion 26 is formed only by the equilateral angle iron 26a,
Since the remainder of the convex portion 26 is formed by the equilateral angle iron 26a and the plate-like member 26b attached thereto,
Here, the tip of the remaining portion of the convex portion 26 is a plate-like member 26b.
It is shaped like a plate. Each of the equilateral angle irons 26a and the plate-like members 26b has an elongated rod shape, and their longitudinal directions are arranged so as to be substantially parallel to the axis of a straight cylinder formed by the drum main body 24. Therefore, the protrusion 26 is formed along a direction substantially parallel to the drum rotation axis. The structure and shape of the projection 26 when the drum body 24 is cut along a plane perpendicular to the axis of the right cylinder are the same as those shown in FIG. 4 at all positions.

The drum 21 is a rubber pneumatic tire 3
3 (a roller member) and a frame 35 that rotatably supports the tire 33 at a predetermined position, a straight cylindrical shaft (a predetermined drum rotation axis, which is horizontal) formed by the drum 21 (drum main body 24). ) Is rotatably supported around. That is, in the present embodiment, the tire 33
And the frame 35 constitute support means.

The tires 33 include tires 33a, 33b, 3
3c, 33d, 33e, 33f, 33g, and 33h support the drum 21 from the front side of the apparatus 11 (that is, the side seen from FIG. 1). Back side (that is, the side opposite to the side seen from FIG. 1)
Supports the drum 21. In addition, among the eight tires supporting the drum 21 from the back side, the tires 33i, 3i
3j, 33k, 331, 33n and 33p are shown in FIG.
Alternatively, it is shown in FIG. 3, but the other two tires are not shown. Tires 33a, 33b, 33
The frames c, 33f, 33g, and 33h are rotated by the frame 35a such that their rotation axes are substantially parallel to a straight cylindrical axis (predetermined drum rotation axis) formed by the drum 21 (drum main body 24), and as described later. Drum body 24 as a ring
(That is, the ring portion is formed integrally with the drum). Although the frame 35a is partially omitted for easy understanding, the frame 35a has a structure capable of stably supporting the drum 21. The tires 33d and 33e are rotated by the frame 35b such that their rotation axes are substantially parallel to the axis (predetermined drum rotation axis) of a straight cylinder formed by the drum 21 (drum main body 24).
1 and the shaft of the straight cylinder (predetermined drum rotation shaft)
Ring 29, which is a circular ring-shaped ring part having the axis as its axis
a, 29b. The frame 35
Although a part of b is omitted in the figure for easy understanding, the structure is such that the drum 21 can be stably supported. The frame 35b is provided with a gear box 41 for rotating the tires 33d and 33e by receiving the rotational power of an internal combustion engine (diesel engine for trailer) (not shown). Eight tires (tires 33) supporting the drum 21 from the back side
i, 33j, 33k, 331, 33n, and 33p (two tires not shown) and a frame (frame 3) that rotatably supports these eight tires at predetermined positions.
5c is partially shown in FIG. 4)
The description is omitted here because it is the same as above.
Two of the eight tires supporting the drum 21 from the rear side (one of them is a tire 331 and the other is not shown) are rings 29a and 29
Although it is in contact with the outer surface of b, unlike the tires 33d and 33e, it is not driven by power but rotatable. Tires 33a, 33c, 33d, 33e,
33f, 33h and the corresponding drum 2 from the rear side.
6 (including tires 33i, 3
3k, 331, 33n, and 33p are shown in the drawing, and contact the outer surface of the ring portion (drum body 24, rings 29a and 29b) from below to support the weight of the drum 21 and to support the drum 21
While the four tires (tires 33b, 33b, 33b,...) Are arranged such that their rotation axes belong to a horizontal plane to which a straight cylindrical axis (a predetermined drum rotation axis) formed by the drum 21 (drum main body 24) substantially belongs. 33g and 33j are shown, but the remaining one is not shown) is perpendicular to a straight cylinder axis (predetermined drum rotation axis) formed by the drum 21 (drum main body 24) in plan view. Regulate movement to. The movement of the drum 21 in the direction (the direction of arrow G in FIG. 1) along the axis of the straight cylinder (predetermined drum rotation axis) is caused by the movement of the horizontal roller 30a attached to the frame 35a,
30b is the other end side of the rings 29a and 29b (discharge port 2
3) (the drum 21 does not move to the left in FIG. 1), and when the drum 21 moves to the right in FIG. Side) 21a is the main surface 73 of the closing plate 73.
(a), whereby the drum 21 does not move to the right in FIG.

As described above, the gear box 41 receives the rotational power of an internal combustion engine (diesel engine for trailer) not shown via the drive shaft 41a, converts the rotational direction and reduces the speed to rotate the tires 33d and 33e. Let it. The position of the gear box 41 is fixed by the frame 35b. Here, a cylindrical shaft formed by the rings 29a and 29b with which the tires 33d and 33e are in contact with the outer surface, a straight cylindrical shaft (a predetermined drum rotation shaft) formed by the drum 21 (drum main body 24), The rings 29a and 29b are connected to the drum 21 (drum main body 2) so that
4), the drum 21 is rotated around the two coincident axes by rotating the tires 33d and 33e. That is, in the present embodiment, the driving means is an internal combustion engine (not shown) (not shown).
And the power transmission mechanism is composed of the drive shaft 41a and the gear box 4
1. The tire 3 which is a part of the tire 33 (roller member) by the driving means and the power transmission mechanism.
3d and 33e are driven. As described above, the drum 21 is rotated around the axis of the straight cylinder (predetermined drum rotation axis) by the internal combustion engine (diesel engine for trailer) (not shown), the drive shaft 41a, the gear box 41, and the tires 33d and 33e. A rotating means for causing the rotation is provided.
The rotation direction of the drum 21 is the direction of the arrow F in FIG.

The entire edge (the entire circumference) of the edge 21a on the one end side of the drum 21 is substantially in contact with a plane perpendicular to a straight cylindrical axis (a predetermined drum rotation axis) formed by the drum 21 (drum main body 24). Is formed. The closing plate 73 has a main surface 73a perpendicular to a straight cylindrical axis (predetermined drum rotation axis) formed by the drum 21 (drum main body 24).
The main surface 73a is arranged and fixed so as to close the supply port 22 on the one end side of the drum 21. Closing plate 73
The opening 74 is formed so as to communicate with the supply port 22, and the ore can be charged into the supply port 22 via the opening 74. Edge 21 on the one end side of drum 21
Here, there is a gap between a and the main surface 73a of the closing plate 73, but the gap is set to such a size that the ore hardly falls down. Note that small pebbles, sand, and the like having a small particle size spill out from the gap, and these pebbles, sand, and the like are collected by a belt conveyor 81 arranged along the gap below the gap, and further collected by the belt conveyor 83. Is transported to a truck 94, and is carried out together with a rounded cobble-like rock (product stone) 64. A chute 71 communicating with the opening 74 is attached to the closing plate 73. Upper end of chute 71 (blocking plate 7
A rough 61 is dropped from above (from the power shovel 51) near the end opposite to the end attached to 3, and the rough 61 rolls or slides down along the chute 71 and passes through the opening 74. Into the supply port 22. A rubber sheet 72 serving as a cushioning material is attached to the lower surface of the chute 71 where the rough 61 falls and collides from above on the inner surface of the chute 71. As mentioned above,
The raw stone 61 falling from the power shovel 51 is moved by the chute 71 and the closing plate 73 through the supply port 22 to the drum 21.
Supply inside. That is, the supply means has the chute 71 and the closing plate 73 here.

The apparatus 11 has a water spray nozzle 91 as humidifying means. The water spray nozzle 91 is connected to a conduit 91a.
Is sprayed into the drum 21 through the discharge port 23 from the tip thereof,
Humidify inside.

Next, a method of using the present apparatus 11 (this method) will be described. As a rough preparation step, a rough 61 is prepared. The rough stone 61 may be used as it is as long as there is a suitable rock as the rough stone 61, or may be a cracked stone obtained by breaking a large rock into an appropriate size. As a rotation step, the drum 21 is rotated around an axis of a straight cylinder (a predetermined drum rotation axis) formed by the drum 21 (drum main body 24). This starts operation of an internal combustion engine (diesel engine for trailer) not shown, and the drive shaft 4
1a and the tires 33d, 33 via the gearbox 41.
This is achieved by driving e. The rotation speed of the drum 21 is adjusted to 3.5 rotations / minute here. As a supply step, the rock is supplied to the inside of the drum 21 via the supply port 22. More specifically, the ore 61 prepared in the ore preparation step is thrown into the scooping chute 71 by the power shovel 51, so that the closing plate 7 is closed.
3 and is supplied to the inside of the drum 21 via the supply port 22 and the opening 74. In the stirring step, the rock is stirred inside the drum 21 by the rotation of the drum 21, and the rock is moved toward the discharge port 23 while rounding the corner of the rock. Specifically, the ore (rock) supplied to the inside of the drum 21 is stirred by the rotation of the drum 21 so that collision or friction occurs between the rocks or between the rock and the drum inner wall or the like, and the rock The sharp-edged rock is damaged (dropped) or worn away, so that the sharp-edged rock is rounded and rounded. In the present embodiment, the rock is moved toward the discharge port 23 by the rock supplied in the supply step pushing the rock already existing inside the drum 21. Therefore, if the amount of rock supplied per unit time is increased, the residence time of the rock inside the drum 21 is reduced and the degree of rounding and rounding is reduced, and conversely, the amount of rock supplied per unit time is reduced. Drum 21
The residence time of the rock in the interior increases and the degree to which corners are rounded is increased. Outlet 2
3. Emit rocks. Specifically, the rock is moved by the stirring step and moved toward the outlet 23 while being rounded at the corners, and spills from the outlet 23. This is because the rock supplied in the supply step pushes the rock already supplied inside the drum 21 previously supplied, so that the rock passes over the weir 25. As described above, the rock supplied to the inside of the drum 21 is a boulder-like rock (product stone) 6 with rounded corners.
4 and is discharged from the discharge port 23. In addition, outlet 2
A truck 94 is arranged below the unit 3 to receive and carry out a boulder-like rock (product stone) 64.

The method can be performed continuously,
The rotation step, the supply step, the stirring step, and the discharge step are performed in parallel, and the batch operation does not require a raw stone charging step or a product stone removing step, so that there is no need to stop the apparatus, and high production is achieved. Sex can be achieved. The rough preparation step can also be performed in accordance with the supply step. In this embodiment, since the axis of the straight cylinder formed by the drum 21 (drum main body 24) substantially belongs to the horizontal plane, the movement of the rock toward the discharge port 23 in the stirring step depends on the rock supplied in the supply step. This is caused by the rock existing in the drum 21 being pushed toward the discharge port 23, but is caused by an inclination formed on the inner surface of the drum 21, the discharge port 23 side being lower than the supply port 22 side. It may be something.

As described above, using the present apparatus 11 and the method for producing a rounded rock by the present apparatus 11 (this method), the raw stone 61 (rock with sharp corners) is rounded to form a cobblestone-like rock. Manufacturing the (product stone) 64 has the following advantages. (1) According to the present apparatus and method, rocks with sharp corners, which have been rarely used in the past, large stones, which have been rarely used in the past, are divided into small pieces of appropriate dimensions, and shapes and the like are out of specification. The broken stone obtained by subdividing the resulting stone material into appropriate dimensions can be used as the raw stone 61 to produce a cornerstone-rounded cobble-like rock (product stone) 64 having high utility value and versatility. Therefore, effective use of rock resources can be achieved. (2) The supply price and supply amount of cobble obtained by collecting or mining natural cobble fluctuate depending on the conditions of collection or mining, but according to the present apparatus and method, the supply price and supply amount are constant. Stable supply can be performed. (3) By using the rough stone 61 having a particle size or a particle size corresponding to the particle size or the particle size required for the cobble-like rock (product stone) 64, the required rock is used in the entire rock (product stone) 64. It is possible to remarkably reduce the nonstandard stone mixing ratio, which is the weight ratio of rock (nonstandard stone) that does not satisfy the particle size or particle size. The rough 61 having a particle size or a particle size corresponding to the required particle size or the particle size can be obtained by sieving rocks having various particle sizes. It can be obtained efficiently by subdividing it.

[Brief description of the drawings]

FIG. 1 is a front view showing the present apparatus of one embodiment.

FIG. 2 is a left side view of the apparatus shown in FIG.

FIG. 3 is a sectional view taken along line BB of FIG. 2;

FIG. 4 is a CC end view of FIG. 1;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 11 This apparatus 21 Drum 21a Edge 22 Supply port 23 Drain port 24 Drum main body 24r Inner peripheral surface (of drum main body) 25 Weir part 26 Convex part 26a Equilateral angle steel 26b Plate-shaped member 29a, 29b Ring 30a, 30b Lateral roller 33 , 33a, 33b, 33c, 33d, 33e, 33
f, 33g, 33h, 33i, 33j, 33k, 33
1, 33n, 33p Tire 35, 35a, 35b, 35c Frame 41 Gear box 41a Drive shaft 51 Power shovel 61 Raw stone 64 Cobble-like rock (product stone) 71 Chute 72 Rubber sheet 73 Closing plate 73a (of closing plate) main surface 74 opening 81, 83 belt conveyor 91 water spray nozzle 91a conduit 94 truck

Claims (18)

[Claims] A cylindrical drum having a supply port on one end side and a discharge port on the other end side; supporting means for rotatably supporting the drum around a predetermined drum rotation axis; And a rotating means for rotating the drum around a rotation axis of the drum. 2. The apparatus according to claim 1, wherein a convex portion is formed on an inner surface of the drum. 3. The apparatus according to claim 2, wherein the convex portion is formed along a direction substantially parallel to the drum rotation axis. 4. The apparatus according to claim 3, wherein the whole or a part of the convex portion has a plate shape. 5. The apparatus according to claim 1, wherein a dam portion for damming a rock is provided on the other end side of the drum. 6. The cylinder according to claim 5, wherein the weir portion is a truncated right circular cone whose bottom surface on the large diameter side faces the one end and whose axis is arranged substantially parallel to the drum rotation axis. apparatus. 7. The apparatus according to claim 1, further comprising a supply means for supplying the ore to the inside of the drum via the supply port. 8. The drum according to claim 8, wherein an entire edge of said one end side is substantially in contact with a vertical surface with respect to said drum rotation axis, and said supply means comprises a main surface perpendicular to said drum rotation axis. And a closing plate for closing the supply port on the one end side of the drum by the main surface, the closing plate having an opening formed so as to communicate with the supply port. Item 8. The apparatus according to Item 7. 9. The apparatus of claim 8, wherein said supply means further comprises a chute communicating with said opening. 10. The apparatus according to claim 9, wherein a cushioning material is attached to at least a part of the inner surface of the chute. 11. A circular ring-shaped ring portion formed on said drum and having said drum rotation axis as its axis, said ring portion being formed so that said rotation axis is substantially parallel to said drum rotation axis. And a roller member arranged to abut on the outer surface of the drum to support the drum.
Apparatus according to any of the preceding claims. 12. The apparatus according to claim 11, wherein said rotating means drives all or a part of said roller member by driving means. 13. The apparatus according to claim 1, further comprising humidifying means for humidifying the inside of the drum. 14. The humidifying means according to claim 1, wherein said humidifying means sprays water into said drum through said discharge port.
An apparatus according to claim 3. 15. The apparatus according to claim 1, wherein all or a part of the cylinder is a cylinder. 16. A rotating step for rotating a cylindrical drum having a supply port on one end side and a discharge port on the other end side around a predetermined drum rotation axis, and into the drum via the supply port. A supply step of supplying the rock and the rock; a stirring step of stirring the rock inside the drum by rotating the drum and moving the rock toward the discharge port while rounding a corner of the rock; and A step of discharging the rock, the method comprising the steps of: 17. The movement of the rock toward the discharge port in the stirring step is caused by the rock supplied in the supply step pushing the rock existing inside the drum toward the discharge port. The manufacturing method according to claim 16. 18. The movement of the rock toward the discharge port in the stirring step is formed on the inner surface of the drum.
The manufacturing method according to claim 16, wherein the discharge port side is lower than the supply port side by inclination.