JP2008143702A - Conveyor apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a conveyor apparatus capable of reducing transfer resistance by transferring an object to be conveyed by a trough type belt conveyor and a screw shaft, and capable of effectively mixing and stirring the object to be conveyed while smoothly transferring it. <P>SOLUTION: The conveyor apparatus is provided with the trough type belt conveyor 1 having a placing surface of an endless belt 10 laid between rollers 11 and 12 as a trough surface 10a which is curved, and the screw shaft 2 having a spiral blade 212 on a rotating shaft 20. The screw shaft is pivotally supported so that the axial direction extends to the transferring direction of the trough type belt conveyor in the state where an outer peripheral edge of the spiral blade is brought into contact with or gets close to a bottom part of the trough surface. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  In the present invention, crushed stone, crushed sand, concrete waste aggregate, mud, earth and sand, dewatered sludge, waste mixed aggregate, blast furnace slag aggregate, etc. alone or a mixture thereof, and fine powder or / and aggregate are mixed in the raw concrete. Further, the present invention relates to a conveyor device that can use mixed raw aggregate, raw concrete, and the like as main objects to be conveyed, and can mix and agitate them while transporting them.

  Conventionally, trough belt conveyors and screw conveyors are known as conveyor devices (see Patent Document 1 and Patent Document 2).

The trough type belt conveyor has an endless belt stacking surface that is looped between rollers and is curved as a trough surface, and this trough surface has the advantage that the transported object can be prevented from spilling from both side edges of the endless belt. There is.
However, the trough type belt conveyor is merely a transport device, and does not have a function of mixing and stirring while transporting a transported object.

  In addition, the belt conveyor is generally limited to be installed at an inclination angle of about 25 degrees, and when it is installed at an inclination angle of more than this, the slippage of the conveyed object on the surface of the endless belt. It is necessary to project a crosspiece member to prevent this, and when crushed stone is used as the object to be conveyed, even if such a bar member is protruded, the object cannot be prevented from slipping down sufficiently. There was a problem.

  In addition, since the screw conveyor is provided with a screw shaft inside the trough, mixing and stirring can be performed while transferring the object to be transported introduced into the trough by the rotation of the screw shaft.

However, since the trough is fixed to this screw conveyor, the object to be conveyed is transferred while receiving much frictional resistance with the inner surface of the trough only by rotation of the screw shaft.
A large load is applied to the rotation of the screw shaft due to such transfer resistance to the object to be conveyed.For example, when crushed stone or the like is the object to be conveyed, crushed stone or the like is present between the spiral blade of the screw shaft and the inner surface of the trough. Biting, spiral blades and troughs wear out violently, and abnormal noise is generated.

In addition, the crushed stone is mixed and stirred by co-rotating with the rotation of the screw shaft. However, the crushed stone is not sufficiently mixed due to the frictional resistance with the inner surface of the trough, and the mixing and stirring function of the crushed stone cannot be fully exhibited. There was a problem.
Conventionally, a screw conveyor using crushed stone or the like as a transported object has not been found.
Japanese Utility Model Publication No. 6-49412 Japanese Patent Laid-Open No. 10-119028

  The conveyor apparatus of the present invention reduces the transfer resistance by transferring the object to be transported by the trough type belt conveyor and the screw shaft, and enables the mixing and stirring at the same time while smoothly transporting the object to be transported. An object is to provide an apparatus.

In order to solve the above problems, the conveyor device of the present invention (Claim 1)
A trough-type belt conveyor in which a loading surface of an endless belt hung between rollers is curved as a trough surface;
A screw shaft provided with a spiral blade on the rotation shaft,
The screw shaft is pivotally supported so that its axial direction extends in the transport direction of the trough belt conveyor in a state where the outer peripheral edge of the spiral blade is in contact with or close to the bottom of the trough surface.

The conveyor device of the present invention (Claim 2)
The conveyor device according to claim 1, wherein a tunnel-shaped cover provided so as to cover the trough surface of the endless belt and the screw shaft, and a blower for blowing air inside the tunnel-shaped cover are provided. It was.

The conveyor device of the present invention (Claim 3)
3. The conveyor device according to claim 1 or 2, wherein two rows of trough surfaces are formed in parallel on the stacking surface of the endless belt, and the two outer circumferential edges of the spiral blades are in contact with or close to the two rows of trough surfaces. The two screw shafts are pivotally supported in parallel, and the two screw shafts are formed so that the opposing sides rotate at the same rotational speed from bottom to top.

The conveyor device of the present invention (Claim 4)
4. The conveyor apparatus according to claim 1, wherein the transfer speed of the object to be conveyed by the trough type belt conveyor and the transfer speed of the object to be conveyed by the screw shaft are set to be substantially the same.

The conveyor apparatus according to the present invention is characterized in that the object to be conveyed is transferred by using both the transfer by the trough belt conveyor and the transfer by the screw shaft by combining the screw shaft with the trough belt conveyor.
Thus, the transfer resistance is reduced, and the agitated material can be efficiently mixed and stirred at the same time while smoothly transferring the object to be conveyed.

As described above, since the transfer resistance can be reduced, for example, even when crushed stone or the like is used as the object to be conveyed, the crushed stone or the like is prevented from being caught between the spiral blade of the screw shaft and the inner surface of the trough. Wear of blades and troughs and generation of abnormal noise can be suppressed, and the load applied to the rotation of the screw shaft can be reduced.
In addition, since the transfer resistance of the object to be conveyed can be reduced, it is possible to promote the co-rotation of the object to be conveyed along with the rotation of the screw shaft, and to sufficiently mix and agitate crushed stones.
In addition, when installed in an inclined state, the object to be transported about to slide down is in a state where the screw shaft receives from below, so that the object to be transported can be reliably secured even when installed at a steep inclination (about 45 degrees). Can be transported.

  Further, when a tunnel-shaped cover is provided so as to cover the trough surface of the endless belt and the screw shaft, and the air is blown by the blower inside the tunnel-shaped cover (Claim 2), the mixture is stirred while being transferred. It is possible to apply wind to the object to be conveyed, and to promote drying of the object to be conveyed.

  Further, when the two screw shafts are supported in parallel on the loading surface of the endless belt so that the opposite side rotates from the bottom to the top (Claim 3), the object to be conveyed is placed between the two screw shafts. Therefore, it is possible to efficiently transfer and mix and stir the object to be conveyed, and to prevent the object to be spilled out.

  In addition, if the transfer speed of the object to be conveyed by the trough type belt conveyor and the transfer speed of the object to be conveyed by the screw shaft are set to be substantially the same (Claim 4), the transfer resistance of the object to be conveyed is almost eliminated. The conveyed product can be smoothly transferred, and the co-rotation of the conveyed product with the screw shaft is promoted, so that mixing and stirring can be effectively performed.

  FIG. 1 is a cutaway side view showing an embodiment of a conveyor apparatus according to the present invention, and FIG. 2 is a sectional view showing the conveyor apparatus.

In the figure, reference numeral 1 denotes a trough type belt conveyor, in which an endless belt 10 is wound around a driving roller 11 provided at the front end of the frame 9 and a driven roller 12 provided at the rear end of the frame 9.
The upper transition portion of the endless belt 10, that is, the side carrying the conveyed product is supported by a traflora, so that the loading surface is curved with a trough surface.
In this embodiment, the loading surface is supported by the inclined rollers 13 and 13 that support both side portions of the endless belt 10 in a V shape from the bottom, and the horizontal roller 14 that supports the center portion of the endless belt 10 from the bottom. I) The surface 10a is curved.
In the figure, reference numeral 15 denotes a bearing bracket which pivotally supports a trawler (inclined rollers 13, 13 and a horizontal roller 14).

In addition, other examples of the support structure by a traflora are shown in FIGS.
The support structure shown in FIG. 3 is configured so that the loading surface of the endless belt 10 is supported by inclined rollers 13 and 13 that support both end portions of the endless belt 10 in a V shape from below and a drum-shaped roller 15 that supports the center portion of the endless belt 10 from below. It is curved and formed on the trough surface 10a.

  The support structure shown in FIG. 4 is configured so that the loading surface of the endless belt 10 is supported by inclined rollers 13 and 13 that support both end portions of the endless belt 10 in a V shape from below and a coiled roller 16 that supports the center portion of the endless belt 10 from below. It is curved and formed on the trough surface 10a.

  The support structure shown in FIG. 5 is formed on the trough surface 10a by curving the loading surface of the endless belt by the coiled roller 17 that supports the entire width of the endless belt 10 from below.

  In the support structure of FIG. 6, the loading surface of the endless belt 10 is curved and formed on the trough surface 10 a only by the inclined rollers 13 and 13 that support both side portions of the endless belt 10 in a V shape from below.

In the figure, reference numeral 2 denotes a screw shaft, and a rotary blade 20 is provided with a spiral blade 21.
The screw shaft 2 of the embodiment is attached to the rotary shaft 20 via a support member 23 so that a spiral blade 21 formed in a spiral shape with a belt-like plate having a constant width holds a gap 22 between the screw shaft 2 and the rotary shaft 20. Yes.
The axial direction of the screw shaft 2 extends in the transport direction (arrow N direction) of the trough-type belt conveyor 1 with the outer peripheral edge of the spiral blade 21 in contact with or close to the bottom of the trough surface 10a. Is pivotally supported.

Further, the rotation direction and the spiral direction of the screw shaft 2 are such that, by the rotation, the object to be conveyed loaded on the trough surface 10a of the endless belt 10 is transferred in the same direction as the transfer direction by the trough belt conveyor 1. Is formed.
As the screw shaft 2, as shown in FIGS. 5, 6, and 7, a blade-like spiral blade 21 a that is directly raised from the outer peripheral surface of the rotary shaft 20 may be used.

In this embodiment, a tunnel-like cover 3 is provided so as to cover the trough surface 10 a of the endless belt 10 and the screw shaft 2, and a blower 4 for blowing wind (or hot air) inside the tunnel-like cover 3. Is provided.
In this case, the blower device 4 is not limited to the blower blower, and exhaust air from an engine such as an automobile or a civil engineering machine may be introduced into the tunnel-shaped cover 3, or a heating device may be provided in the middle of the blower path. Alternatively, hot air may be blown by providing a burner at the outlet.
As described above, when the tunnel-shaped cover 3 and the blower 4 are provided, it is possible to apply wind to the object to be conveyed and to promote drying of the object to be conveyed.
In this case, since the gap 22 is formed in the screw shaft 2, wind (or hot air) can be applied to the conveyed object through the void 22, and the conveyed object can be efficiently dried.

In the figure, 50 is a drive motor for the trough type belt conveyor 1, 51 is a drive motor for the screw shaft 2, and both the drive motors 50 and 51 are provided independently.
In this embodiment, both the drive motors 50 and 51 and the power of the drive motors 50 and 51 are arranged so that the transport speed of the transported object by the trough belt conveyor 1 and the transport speed of the transported object by the screw shaft 2 are substantially the same. The transmission system is set.

  Note that the transfer speed of the object to be conveyed by the trough belt conveyor 1 and the transfer speed of the object to be conveyed by the screw shaft 2 are not necessarily set to be the same. The transfer speed of the object to be conveyed by the screw shaft 2 can be made faster or slower.

  In the figure, reference numeral 6 denotes a supply hopper for the object to be conveyed. The object to be conveyed introduced from the supply hopper 6 to the start end side (left side in FIG. 1) of the trough type belt conveyor 1 is transferred by the trough type belt conveyor 1. , Which is transferred by using both of the transfer by the screw shaft 2, thereby reducing the transfer resistance, and the object to be transported is smoothly mixed and stirred at the same time while being smoothly transferred to the end side of the trough belt conveyor 1. It is dropped and discharged from (right side in FIG. 1).

Next, FIG. 6 is a schematic sectional view showing another embodiment of the conveyor apparatus according to the present invention.
In this conveyor device, the entire device is inclined with respect to a horizontal plane L.
When the screw shaft 2 is rotated (in the direction of arrow A), the object to be conveyed tends to be shifted to the upward rotation side (B side in FIG. 6). Since there is a possibility that it will be insufficient, the endless belt 10 is inclined so that the upward rotation side B of the screw shaft 2 is upward so that the deviation of the conveyed object is eliminated as much as possible.

Next, FIG. 7 is a schematic sectional view showing another embodiment of the conveyor apparatus according to the present invention.
In this conveyor device, two rows of trough surfaces 10a, 10a are formed in parallel on the loading surface of the endless belt 10, and the outer peripheral edges of the spiral blades 21a, 21a are in contact with or close to the two rows of trough surfaces 10a, 10a. Thus, the two screw shafts 2 and 2 are supported in parallel.
In this case, the support structure by the traflora is an endless belt by inclined rollers 13 and 13 for supporting both side portions of the endless belt 10 in a V shape from below and a mountain roller 18 for supporting the center portion of the endless belt 10 to be lifted from below. Two rows of trough surfaces 10a, 10a are formed in parallel on the 10 stacking surfaces.

The two screw shafts 2 and 2 are formed so that the opposite sides rotate from the bottom to the top at the same rotational speed. Thus, when the two screw shafts 2 and 2 are provided, Can be gathered between the two screw shafts 2, 2, transported objects and mixing and stirring can be performed efficiently, and spillage of the conveyed objects can be prevented.

In the present invention, the material of the endless belt is not particularly limited as long as the endless belt has a flexibility that can be formed on the trough surface by curving the loading surface, but the surface is covered with an elastic member. It is preferable to use it in order to release the bite of the conveyed object.
Also, the trough depth, curvature of curvature, etc. can be designed as appropriate.
In addition, it is possible to appropriately add a conventionally known structure such as providing skirts for preventing spillage on both upper surfaces of the endless belt.

  Moreover, as a trough type belt conveyor, an air levitation type belt conveyor in which an endless belt is floated by supplying air between the trough and the endless belt (see, for example, Japanese Patent Publication No. 2006-8371). ) Can be used.

  Also, if an elastic member such as rubber or urethane is attached to the outer peripheral part of the screw blade spiral blade, or if an elastic member such as rubber or urethane is attached to the outer peripheral surface of the traflora, the screw shaft spiral blade and trough surface When the object to be conveyed is caught between the two, the elastic member becomes a cushion, so that the biting can be released, and wear and breakage due to the biting can be reduced.

  In addition, the conveyor device of the present invention can be suitably used when installed in an upwardly inclined state for the purpose of transferring an object to be conveyed from the bottom to the top, but it is of course possible to install it horizontally and use it.

  It is a notch side view which shows the Example of the conveyor apparatus which concerns on this invention.   It is sectional drawing which shows this conveyor apparatus.   It is a schematic sectional drawing which shows the other example of the support structure by a traflora.   It is a schematic sectional drawing which shows the other example of the support structure by a traflora.   It is a schematic sectional drawing which shows the other example of the support structure by a traflora.   It is a schematic sectional drawing which shows the other Example of the conveyor apparatus which concerns on this invention.   It is a schematic sectional drawing which shows the other Example of the conveyor apparatus which concerns on this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Trough type belt conveyor 10 Endless belt 10a Trough surface 11 Driving roller 12 Driven roller 13 Inclined roller 14 Horizontal roller 15 Drum-shaped roller 16 Coiled roller 17 Coiled roller 18 Yamagata roller 2 Screw shaft 20 Rotating shaft 21 Spiral blade 21a Spiral blade 22 Gap 23 Support material 3 Tunnel cover 4 Blower 50 Drive motor 51 Drive motor 6 Supply hopper 9 Frame

Claims (4)

A trough-type belt conveyor in which a loading surface of an endless belt hung between rollers is curved as a trough surface;
A screw shaft provided with a spiral blade on the rotation shaft,
The screw shaft is pivotally supported so that its axial direction extends in the transport direction of the trough belt conveyor in a state where the outer peripheral edge of the spiral blade is in contact with or close to the bottom of the trough surface. Conveyor device.   2. The conveyor according to claim 1, wherein a tunnel-shaped cover provided so as to cover the trough surface of the endless belt and the screw shaft, and a blower for blowing air inside the tunnel-shaped cover are provided. apparatus.   3. The conveyor device according to claim 1 or 2, wherein two rows of trough surfaces are formed in parallel on the stacking surface of the endless belt, and the two outer circumferential edges of the spiral blades are in contact with or close to the two rows of trough surfaces. The two screw shafts are supported in parallel, and the two screw shafts are formed so that the opposite sides rotate at the same rotational speed from bottom to top.   4. The conveyor apparatus according to claim 1, wherein the transfer speed of the object to be conveyed by the trough type belt conveyor and the transfer speed of the object to be conveyed by the screw shaft are set to be substantially the same.

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