JP2002068437A - Belt conveyor system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To minimize an installing area, eliminate a large setup change when once installed and prevent lowering of quality of a cargo to carry such as concrete. SOLUTION: A belt conveyor main body 2 to carry the cargo is furnished with a roughly vertically extending vertical part 8 and a roughly horizontally extending horizontal part 9, the vertical part 8 of the belt conveyor main body 2 is built in a mast part 4 of a tower frame 1 erected at a setting point and the horizontal part 9 of the belt conveyor main body 2 is built in a main boom part 5 free to revolve along a horizontal surface as well as roughly horizontally extending from an upper part of the mast part 4 of the tower frame 1. The cargo loaded in the vertical part 8 of the belt conveyor main body 2 is carried upward in the vertical direction by a holding belt 13 constituting this vertical part 8, and thereafter, this cargo is carried to the head end side of the main boom 5 by the horizontal part 9 of the belt conveyor main body 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a belt conveyor device used as a facility for transporting concrete in dam construction, for example.

[0002]

2. Description of the Related Art Mechanical facilities such as cable cranes, tower cranes, mobile cranes, belt conveyors, and the like are generally used as concrete transportation equipment accompanying concrete casting in dam construction.

[0003] When a cable crane is used, a large foundation is required for the cable fixing reaction force, and the mountainside mountain must be cut large, which causes natural destruction. In addition, at the time of work, in order to use the wire rope stretched in the valley as a guide rail,
Since a suspended load such as a concrete bucket always passes over the embankment where the worker is working, there is a problem in terms of safety.

In recent years, concrete conveyance by a belt conveyor capable of continuous conveyance other than the crane has been adopted. As the form, as shown in FIG. 18, a plurality of general belt conveyors B,... Are merely arranged in tandem. In the case of the ordinary belt conveyor B, the installation inclination angle θ is slightly different depending on the material to be conveyed, but is preferably set to 10 degrees or less so as to prevent the aggregate from rolling down. In FIG. 18, 101 indicates a dam embankment, 102 indicates a batcher plant, and 103 indicates a support base for supporting the belt conveyor B.

[0005]

When the conventional belt conveyor is to be set while observing the above-described gradient condition at the time of installation, a large number of conveyors are required to transport the concrete to the top of the dam embankment 101. The belt B must be installed in a zigzag manner, requiring a large installation area.

As the construction progresses, the dam embankment 101
Because of the increase in height, even in the middle of construction, a long large conveyor frame must be relocated and set up several times, and the height of the support base 103 also becomes short in the same manner. Must be increased each time using a crane 104 or the like, and a very large setup change operation is inevitable.

[0007] Depending on the plan, an extra-large mobile crane and a traveling path on which these large vehicles can travel must also be provisionally provided, which may incur extra costs. In addition, since the number of connecting points increases, the quality of concrete is adversely affected.

[0008] The present invention has been made in view of the above circumstances, and its object is to reduce the installation area, and once installed, no large setup change is required, and the quality of concrete or the like is deteriorated. It is an object of the present invention to provide a belt conveyor device which can prevent the occurrence of the belt.

[0009]

Means for Solving the Problems According to the first aspect of the present invention for solving the above-mentioned problems, the invention forms a pair with each other,
It is characterized in that it is provided with a holding belt comprising a main transport belt and a presser belt which is arranged to face the main transport belt and presses the transport material loaded on the main transport belt so as not to fall.

In this case, since the load such as concrete is sandwiched and conveyed by the holding belt composed of the main transfer belt and the holding belt, not only when the holding belt is in the horizontal posture, but also when the holding belt is inclined obliquely or vertically. Even when the vehicle stands up, the load can be reliably transported while preventing the load from falling.

According to a second aspect of the present invention, in the first aspect of the invention, on the back side of the main transport belt and the pressing belt, the two belts move in a direction away from each other by contacting the belts. And a belt movement restricting member made of a material having a low coefficient of friction.

In this case, the main transport belt and the presser belt are restricted from moving in the direction away from each other by the belt movement restricting member disposed on the back side. Even if the belts receive an excessive reaction force such that the belts move away from each other from the load sandwiched between them, the belts do not move in the same direction, and the belts spread and the load drops. Failure can be prevented from occurring. Further, since the belt movement restricting member is made of a material having a low friction coefficient, even if the main transport belt or the pressing belt abuts on the belt movement restricting member, the frictional force acting between them at that time can be suppressed.

According to a third aspect of the present invention, in the first or second aspect of the present invention, the holding belt includes a vertical portion extending substantially vertically, and the vertical portion is incorporated in a mast portion of the tower frame. It is characterized by.

In this case, when a load is loaded on the holding belt, the loaded load is transported by the vertical portion of the holding belt to a predetermined height in the vertical direction, that is, a predetermined height of the mast portion of the tower frame. Since the load can be raised vertically in this manner, a relatively narrow space is sufficient for raising the load to a predetermined height.

According to a fourth aspect of the present invention, in the third aspect of the present invention, a climbing mechanism for raising a vertical portion of the holding belt along a mast portion is attached to the tower frame. I have.

In this case, as long as the height is within the range of the height allowed by the mast portion of the tower frame, the load can be freely transported to a higher elevation. Therefore, it is preferably used when a load must be transported to a higher position in accordance with the progress of construction, for example, when used for concrete transportation during concrete construction in dam construction.

According to a fifth aspect of the present invention, in the invention of the fourth aspect, the upper portion of the vertical portion of the holding belt is allowed to rise when the upper portion of the holding belt is raised by the climbing mechanism. A feature of the present invention is that a stretching / tensioning mechanism for giving a predetermined tension to the vertical portion during transport is additionally provided.

In this case, the vertical portion of the holding belt is held in a so-called stretched state with a predetermined tension by the stretching / tensioning mechanism during normal operation, so that the load is held by the holding belt. Smooth conveyance can be performed without causing any trouble such as stagnation in a part of the paper. In addition, when the upper part of the vertical portion of the sandwiching belt is lifted by the climbing mechanism, measures such as temporarily relaxing the tension by the stretching / tensioning mechanism are taken. Done without.

According to a sixth aspect of the present invention, in the invention of the third aspect, a main boom portion extending substantially horizontally and capable of turning along a horizontal plane is provided above the mast portion of the tower frame. The main boom part is characterized in that a first belt conveyor horizontal part for receiving the load conveyed by the sandwiching belt and conveying the load to the front end side of the main boom part is incorporated.

In this case, when a load is loaded on the vertical portion of the holding belt, the loaded load is transported by the vertical portion to a predetermined height in the vertical direction, and then transferred from the holding belt to the first conveyor belt horizontal portion. You. The transferred load is conveyed to the front end side of the main boom by the first conveyor belt horizontal portion. Here, since the main boom is capable of turning along the horizontal plane, the load conveyed to the tip side of the main boom can be conveyed over a wide horizontal range which is a predetermined height and a turning portion of the main boom. Become.

According to a seventh aspect of the present invention, in the invention of the sixth aspect, a sub-boom is provided at the tip of the main boom so as to be slidable along a length direction thereof and pivotable along a horizontal plane, The sub-boom is characterized in that a second belt conveyor horizontal section separate from the first belt conveyor horizontal section mounted on the main boom is mounted.

In this case, the load loaded on the vertical portion of the sandwiching belt is transported by the vertical portion to a predetermined height in the vertical direction, and is transported to the leading end side of the main boom by the first belt conveyor horizontal portion. It is conveyed to the tip side of the sub-boom at the second belt conveyor horizontal portion. Here, the secondary boom is provided so as to be slidable with respect to the main boom and rotatable along a horizontal plane, and has a high degree of freedom. And the operability of transporting the load increases.

[0023]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a side view showing a schematic configuration in a case where the belt conveyor device according to the present invention is used as a facility for transporting concrete accompanying concrete placing in a dam construction, FIG. 2 is a plan view of the belt conveyor device, and FIG. It is an enlarged side view which shows the principal part of a belt conveyor device.

The belt conveyor device 1 shown here comprises a belt conveyor main body 2 for transporting a load, and a tower frame 3 for supporting the belt conveyor main body 2 vertically or horizontally at a predetermined height. . Tower frame 3
Is a mast part 4 erected at the installation location,
A main boom 5 extending substantially horizontally from the upper part of the main boom and capable of turning along a horizontal plane; and a tip end of the main boom 5 provided at the tip of the main boom 5 so as to be slidable along its own longitudinal direction and rotatable along the horizontal plane. Sub boom 6.

The belt conveyor main body 2 extends substantially horizontally on a vertical portion 8 supported vertically by a mast portion 4 of the tower frame 3 and on a main boom 5 and a sub boom 6 of the tower frame 3. And horizontal portions 9 and 10 supported by the main body.

For the vertical portion 8 of the belt conveyor body 2, a holding belt 13 having a special structure shown in FIGS. 4 to 10 is used. The holding belt 13 is not only supported by the mast portion 4 of the tower frame 3 in a substantially vertical shape but also connected to a belt conveyor 14a for supplying concrete of the batcher plant 14 shown in FIGS. , To the lower end of the mast section 4 of the tower frame 3. An aggregate conveyor 14c is provided between the batcher plant 14 and the aggregate bin 14b.
The aggregate in the aggregate bin 14b is supplied to the batcher plant 14 via the aggregate conveyor 14c (see FIG. 2).

As shown in FIG. 4, FIG. 5, and FIG. 8, the holding belt 13 is
And a pressing belt 17 which is arranged to face the main transport belt 16 and presses the transport material loaded on the main transport belt 16 so as not to fall. As shown in FIGS. 3 and 5, the main transport belt 16 includes an endless annular flat belt main body 19 wound between pulleys 18, 18, and left and right sides of a surface of the flat belt main body 19 facing the holding belt 17. The wavy ear bars 20 and 20 having flexibility in which the concave and convex portions are continuous along both sides.

As shown in FIGS. 3 and 5, the holding belt 17 faces an endless flat belt main body 22 wound around the pulleys 21 and 21 and the main transport belt 16 of the holding belt 17. A large number of flexible partition plates 23 provided at predetermined intervals along the length direction on the surface to be formed.
And horizontal bars 24, 24 for preventing leakage provided respectively on the left and right side edges of the same surface as the surface on which the partition plate portion 23 of the flat belt main body 22 is provided. The main transport belt 16 and the holding belt 17 are controlled by control means (not shown) so that they are always operated at the same speed.

In the holding belt 13 operated as described above, for example, concrete C to be transferred is held between the main transfer belt 16 and the pressing belt 17 as shown in FIG. In this state, the concrete C is transported not only horizontally but also vertically upward with the movement of the belts 16 and 17. Note that FIG.
9A shows a state in which the concrete C is being conveyed by the holding belt 13, and FIG. 9B shows a state in which the concrete C is running in an empty state without being conveyed by the holding belt 13. .

Further, the wavy ear cross section 20 of the main transport belt 16 is provided.
When the front end side is wound around the pulley 18, it is located on the outer peripheral side of the flat belt main body 19, so that the turning radius becomes large, and there is a possibility that the front end side will not be quickly rotated if the length is flat. However, as is apparent from a comparison between FIG. 6 and FIG. 7, there is no problem because the wavy ear bar 20 is deformed so as to approach a straight line when wound around the pulley 18.

As shown in FIGS. 8 and 9, the mast section 4 of the tower frame 3 is provided on the back side of the main transport belt 16 and the holding belt 17 constituting the holding belt 13 with, for example, a polymer material. A belt movement restricting member 26 made of a material having a low coefficient of friction, such as, is supported and mounted on a metal mounting seat 27. The belt movement restricting member 26 restricts the movement of the two belts 16 and 17 in a direction away from each other.

As described above, the holding belt 13 is not limited to a portion supported substantially vertically by the mast section 4 of the tower frame 3, but also includes a batcher plant 14 as shown in FIG.
Is also used for the path from the connecting portion of the belt conveyor 14a for supplying concrete to the lower end of the mast portion 4 of the tower frame 3, but from the connecting portion of the belt conveyor 14a to the lower end of the mast portion 4 of the tower frame 3. On the path leading to the main belt, the main belt is basically used in a horizontal state (the flat belt main bodies 19 and 22 of the main transport belt 16 and the holding belt 17 are in a horizontal state).

When the holding belt 13 is used in a posture in which the holding belt 13 is in a horizontal state as described above, it can cope with terrain such as a hillside or some unevenness along the support base 29 (see FIG. 1). Can not. Nipping belt 13
2 and 10 (a) to FIG.
As shown in FIG. 10D, the holding belt 13 is gradually lowered while being sandwiched between the guides 30, and is lowered to a position at which it becomes 90 degrees as shown in FIG. 10D. Then, in the state where the flat belt main body 1 is tilted down to 90 degrees,
Since 9, 9 is vertical, it can be curved in any direction along the horizontal plane.

After being bent in the predetermined direction, the folded-down holding belt 13 is returned to the horizontal state again while gradually rising along the guide 30, contrary to the above. Here, the holding bars 17 of the sandwiching belt 13 are provided with the horizontal rails 24, 24 so as to protrude outward beyond the wavy ear rails 20, 20 of the main transport belt 16. When the holding belt 13 is bent in the vertical direction or in the horizontal direction,
The concrete C, which is the object to be conveyed, is prevented from leaking from between the main conveyance belt 16 and the holding belt 17.

As described above, since the holding belt 13 can be freely deformed and conveyed according to the shape of the hillside or the support base 29, there is also a meaning of reducing the number of connections, and one holding belt 13 can be used for a long distance. The concrete C is transported more often. At this time, the driving pulleys 1 at both ends
With only the driving force supplied from the belts 8 and 21,
There is a possibility that the driving force for moving the motors 6 and 17 is insufficient. In that case, a belt drive booster mechanism 31 shown in FIGS. 11 and 12 is used.

With respect to the belt drive booster mechanism 31, for example, the main transport belt 1 constituting the sandwich belt 13
6, when driving the main transport belt 16 of the pressing belt 17 as an example, a drive pulley 33 and a snap pulley 34 are provided on the lower surface of the flat belt main body 19 of the main transport belt 16 at appropriate intervals. ing. A booster belt 35 is wound around these pulleys 33 and 34. On the upper side of the flat belt main body 19 of the main transport belt 16, right and left pressing rollers 36, 36,... Are supported by supporting members 37, 37 so as to be vertically movable, and these pressing rollers 36, 36,. The springs 38, 38,... Interposed between the pressing rollers 36, 36,... And the supporting members 37, 37 make contact with the upper surface of the flat belt main body 19 and the outer portion of the wavy ear bar 20. Has been energized.

The booster belt 35 is rotated in the direction of movement of the main transport belt 16 by rotating the driving pulley 33 by a motor 39, and the booster belt 35 moving in this manner and the left and right holding members are rotated. By sandwiching the left and right side edges of the main transport belt 16 between the rollers 36, 36,..., The rotational force of the booster belt 35 can be transmitted to the main transport belt 16.

On the other hand, horizontal portions 9 and 10 which are respectively installed in the main boom 5 and the sub-boom 6 of the tower frame 3 of the belt conveyor body 2 so as to extend substantially horizontally are trough-shaped belt conveyors having a normal shape. Is used.

The tower frame 3 will be described in detail. As shown in FIG. 3, a revolving unit 40 is provided above the mast unit 4 so as to be revolvable along a horizontal plane.
The revolving superstructure 40 is configured to be revolved at an arbitrary angle by a revolving motor 40a. The main beam 5 is attached to the revolving unit 40 so that the tip end of the revolving unit 40 protrudes outwardly from one side of the revolving unit 40.

A counter beam 41 is attached to the revolving unit 40 so as to extend in a direction opposite to the main beam 5. In the counter beam 41, a hydraulic unit 42 for driving the belt conveyor main body, an oil tank, and the like are arranged as counter weights. The revolving unit 40 is provided with a gantry 43, and the leading ends of the main / sub beams 5, 6 and the counter beam 41 are supported in a well-balanced manner by support wires 44 extending from the gantry 43.

The gantry 43 is provided with a mast section component lifting device 44 for lifting the mast section component 4a constituting the mast section 4, whereby the mast section component is lifted at a predetermined place on the ground. The component member 4a can be lifted.

The lower side of the revolving unit 40 and the revolving unit 40
A climbing mechanism 45 that raises the base, the revolving structure, and the like along the mast unit 4 is attached to a base that rotatably supports the base. The climbing mechanism 45 has built-in lifting drive sources 45a,... Such as hydraulic cylinders, and the mast section constituent members 4a are added by the mast section constituent material lifting device 44 by the rising drive sources 45a,. For the mast section 4, the climbing mechanism 45 itself, the revolving unit 40, and the main / sub beams 5, 6 and the counter beam 41 attached to the revolving unit 40,
It can be raised by the height of the mast part constituting material 4a that has been added.

When the revolving unit 40 is raised by the climbing mechanism 45, the upper part of the vertical portion 8 of the belt conveyor body 2 is also raised at the same time. In order to allow the upper part of the vertical part 8 to rise, the vertical part 8 of the belt
The stretching / tensioning mechanism 47 is attached to the end on the ground side of the holding belt 13 constituting the above.

The stretching / tensioning mechanism 47 is, for example, described by taking the main transport belt 16 of the sandwiching belt 13 as an example, and the pulley 18 wound around the ground-side end of the main transport belt 16 is For example, by pulling away from the tower crane 3 by a tension applying means such as a hydraulic cylinder,
As a result, the main transport belt 16 is given a constant tension. When the upper portion of the holding belt 13 is lifted by the climbing mechanism 45 and the tension meter attached to the main transport belt 16 detects that the tension applied to the main transport belt becomes higher than a preset threshold value. Then, the tension by the tension applying means is reduced based on a signal issued from the tensiometer. Thereby, it is possible to smoothly feed the main conveyor belt 16 to the upper side of the mast section 4. When the lifting of the main transport belt 16 by the predetermined amount by the climbing mechanism 45 is completed, a constant tension is applied to the main transport belt 16 by pulling the pulley 18 in a predetermined direction again by the tension applying means. In addition,
A mechanism having the same configuration is also attached to the holding belt 17 which is the other belt constituting the holding belt 13.

Further, the mast section 4 needs to be raised as the height of the dam body 46 of the dam rises, and at the same time, the revolving unit, the main beam and the like must be raised to a high position by the climbing mechanism 45. If the lift is high, the mast unit 4 may fall down. In order to prevent the mast 4 from overturning, a stay 48 is protruded from the dam bank 46 at a predetermined height, and the mast 4 is supported by the stay 48 (see FIG. 3).

The main boom 5 has a truss structure similarly to the main boom of an ordinary tower crane, and has a trough-shaped first belt conveyor horizontal section 49 constituting the horizontal section 9 of the belt conveyor body 2 inside thereof. Is stored. The main boom 5 has a first belt conveyor horizontal portion 49.
The belt conveyor slide device 51 which slides in the length direction is incorporated. Here, the base end side of the first belt conveyor horizontal portion 49 receives the concrete C discharged from the upper end of the vertical portion 8 of the belt conveyor main body 2 via the chute 52, so that the revolving unit 40 is moved from the main boom 5 to the revolving body 40.
It is arranged with a large overhang. Therefore, when the revolving unit 40 and the like are raised by the climbing mechanism 45, the protruding portion of the first belt conveyor horizontal portion 49 becomes an obstacle. Therefore, when the revolving unit 40 and the like are raised by the climbing mechanism 45, the first belt conveyor horizontal portion 49 is moved to the tip end side of the main boom 5 by the belt conveyor slide device 51 (see the broken line in FIG. 3). . And the climbing mechanism 45
When the revolving structure 40 and the like have been lifted, the belt conveyor slide device 51 is operated again to return the first belt conveyor horizontal portion 49 to the original position.

Further, in addition to the first belt conveyor horizontal portion 49, a crane device 55 suspended by, for example, 2.8 tons is mounted on the main boom 5. The arm 56 supporting the crane hook 56a constituting the crane device 55 is free to travel along a traveling rail (not shown) provided on the main boom 5, so that the crane hook 56a provided at the tip thereof is , Between the lengths of the main boom 5.

At the end of the main boom 5, a sub-boom 6 is provided slidably along its length and rotatable along a horizontal plane. The sub-boom 6 is assembled to the main boom 5 A second belt conveyor horizontal portion 50 that constitutes the horizontal portion 10 and that is separate from the first belt conveyor horizontal portion 49 is assembled. This second
Is supplied from a first belt conveyor horizontal portion 49 constituting the horizontal portion 9 assembled to the main boom 5, and the supplied concrete is assembled to the sub-boom 6. The second
The belt was conveyed to the distal end side of the sub-boom 6 via the belt conveyor horizontal portion 50, and attached to the distal end of the sub-boom 6.
The concrete is supplied to the concrete pouring position via a chute 57 having an appropriate length that meets the conditions of the site.

Next, the operation of the belt conveyor device will be described. The aggregate stored in the aggregate bin 14b is supplied to the batcher plant 14 via an aggregate conveyor 14c, where concrete is produced. The produced concrete is supplied from the belt conveyor 14a to the holding belt 13 connected to the vertical portion 8 of the belt conveyor body 2. The concrete supplied to the sandwiching belt 13 is transported to the lower end of the tower frame 3 while being sandwiched between the main transport belt 16 and the holding belt 17 constituting the sandwiching belt 13.

The holding belt 13 can bend in the vertical direction if it is in a horizontal state as shown in FIG. 10A, and it can be bent in the vertical direction as shown in FIG. 10D. Then horizontal bending is possible. As described above, since it is possible to arrange not only the change in the horizontal direction but also the change in the vertical direction, the concrete C to be transported can be freely transferred to both belts 16 according to the shape of the hillside and the shape of the support base 29. , 17 can be transported over a long distance, and the concrete C can be transported with as little change in properties as possible.

In addition, since the concrete is transported over a long distance by one clamping belt 13, only the driving force supplied from the driving pulleys 18, 21 provided at both ends of the clamping bell 13, the main transport belt 16 and the holding belt are used. There is a possibility that the rotational driving force of each of the motors 17 will be insufficient.
1, the necessary rotational driving force can be supplemented by providing the belt drive booster mechanism 31 shown in FIG. 12 at predetermined intervals as needed, and there is no hindrance to concrete transport over a long distance by one clamping belt 13. .

The concrete conveyed to the lower end of the tower frame 3 by the holding belt 13 as described above is further conveyed therefrom to the upper part of the mast section 4. here,
As shown in FIG. 8 and the like, a belt movement restricting member 26 is mounted on the mast portion 4 of the tower frame 3 on the back side of the main transport belt 16 and the holding belt 17 while being supported by a metal mounting seat 27. Since the belt movement restricting member 26 restricts the movement of the belts 16 and 17 in the direction away from each other, for example, the belts 16 and 17 receive a reaction force from concrete sandwiched between the belts 16 and 17. Even when the belts 16 and 17 receive a force in a direction away from each other, the belts 16 and 17 do not move so as to spread each other. Therefore, the concrete can be reliably transported to the upper part of the mast part 4 without falling the concrete by the holding belt 13.

When the concrete C is conveyed vertically upward while being sandwiched by the sandwiching belt 13, when the belts 16, 17 abut against the belt movement restricting member 26, the belt movement restricting member 26 is made of a material having a low coefficient of friction. , The frictional force acting between them is kept low, so that a situation in which an excessive torque is required to rotate the holding belt 13 does not occur.

The concrete conveyed to the upper part of the mast section 4 by the holding belt 13 as described above is transferred to the first belt conveyor horizontal incorporated in the main boom 5 through the chute 52 provided below the discharge end of the holding belt 13. Transferred to part 49. Then, the concrete transferred to the first belt conveyor horizontal portion 49 is transported by the first belt conveyor horizontal portion 49 to the tip side of the main boom 5, and is further incorporated into the sub-boom 6 therefrom. It is transferred to the second belt conveyor horizontal part 50. Then, the transferred concrete is conveyed by the second belt conveyor horizontal portion 50 to the tip side of the sub-boom 6,
It is dropped and supplied to the casting position at the site through the chute 57.

Here, the main boom 5 is provided so as to be pivotable, and the sub-boom 6 is provided so as to be slidable with respect to the main boom 5 and pivotable along a horizontal plane. The degree of freedom in transporting to the position increases, and the concrete can be quickly supplied to the desired position.

As described above, concrete is poured into the dam embankment 46. However, since the floor of the dam rises with the launch of the concrete, the belt conveyor of the concrete transport equipment must also rise accordingly. Must. To cope with this, the climbing mechanism 45 is used.

That is, first, the mast part component 4a previously placed at a predetermined place on the ground is lifted by the mast part component lifting device 44 provided on the gantry 43, and is added to the upper end of the mast part 4, whereby the mast part 4 is added. To increase the height. Next, the climbing mechanism 45 itself, the revolving unit 40 and the revolving unit 40 are operated by operating an ascending drive source 45a such as a hydraulic cylinder built in the climbing unit 45.
Is raised by the height of the mast part constituting material 4a added.
Hereinafter, the top of the vertical portion 8 of the belt conveyor main body 2 is repeated by repeating the addition of the mast section component 4a and the climbing mechanism and the revolving structure 40, etc., a plurality of times, respectively.
And the horizontal portions 9, 10 of the belt conveyor body 2 assembled to the main / sub beams 5, 6, that is, the first belt conveyor horizontal portion 49 and the second belt conveyor horizontal portion 50.
Can be raised to a predetermined height.

The swing body 40 is moved by the climbing mechanism 45.
At the same time, the upper part of the vertical part 8 of the belt conveyor main body 2 is also raised. When the upper portion of the vertical portion 8 of the belt conveyor body 2 is raised in this manner, a tension meter (not shown) attached to the holding belt 13 constituting the vertical portion 8 applies a predetermined amount or more to the main transport belt 16 and the holding belt 17. It detects that tension is applied. Then, when a signal to that effect is issued from the tension meter, the tension is reduced by a tension applying means such as a hydraulic cylinder built in the stretching / tensioning mechanism 47 under the control of a controller (not shown). As a result, it is possible to smoothly feed the vertical portion 8 of the belt conveyor body 2 to the upper side of the mast portion 4. When the climbing mechanism 45 finishes raising the main transport belt 16 and the like by a predetermined amount, the main transport belt 16 and the pressing belt 17 are again moved by the tension applying means of the stretching / tensioning mechanism 47.
Is given a constant tension.

As described above, the vertical portion 8 of the belt conveyer main body 2 is moved every time the upper portion thereof is pulled up.
Is extended from the end of the vertical portion 8 on the ground portion side. Therefore, at the end of the vertical portion 8 on the ground portion side, an extra belt length is stored in advance in order to replenish the length accompanying the stretching. . The amount of stock varies from site to site,
Approximately 30 to 50 m is possible. Therefore, even in the case of a large dam site, it is sufficient to insert the inlay twice in the middle of the construction. The concrete of the dam body 46 is poured as described above.

A method of cleaning the holding belt 13 constituting the vertical portion 8 of the belt conveyor body 2 will be described. When cleaning the main transport belt 16, as shown in FIGS. 13 to 15, a bottom cleaning rotary brush for cleaning the bottom of the flat belt body 19 of the main transport belt 16 is provided below the main transport belt 16. 61, a side cleaning rotary brush 6 for cleaning the wavy edge bars 20 on the left and right sides of the main transport belt 16.
2 are arranged at intervals in the length direction of the main transport belt 16. Further, ejection nozzles 63,... Are arranged on both sides of the brushes 61, 62, respectively.

The high-pressure water is sprayed from the spray nozzles 63 while moving the main conveyor belt 16, and the rotating brush 61 for cleaning the bottom and the rotating brush 62 for cleaning the side.
Are rotated by the driving devices 64 and 65, respectively, to remove dust such as concrete pieces adhered to the belt 16. The removed dust and cleaning water are collected by a water collecting hopper 66 arranged below the bottom cleaning rotary brush 61 and the side cleaning rotary brush 62.

The same applies to the case where the pressing belt 17 which is the other belt constituting the holding belt 13 is cleaned. As shown in FIGS. 16 and 17, the jet nozzles 67 and , And the cleaning brush 68 is rotated by the driving device 69 to remove dust such as concrete pieces adhered to the belt 17. The removed dust and washing water are collected by the water collecting hopper 70 in the same manner as described above.

It should be noted that the present invention is not limited to the above-described embodiment, and the design can be changed as appropriate without departing from the spirit of the invention. For example, in the above-described embodiment, an example was described in which the belt conveyor device according to the present invention was used for conveying concrete accompanying concrete casting for dam construction, but the belt conveyor device according to the present invention is not limited to this. It can also be used for other purposes, for example, for excavating earth and sand from standing piles for shield construction. Also,
In the above-described embodiment, the sub-boom is provided at the tip of the main boom of the tower frame 3. However, when the site is relatively small and the concrete placing position is not very wide, the sub-boom 6 and It is not always necessary to provide the horizontal portion 10 of the belt conveyor incorporated in the sub-boom 6.

[0064]

According to the first aspect of the present invention, the main transport belt and the transport material stacked on the main transport belt, which are paired with each other and are arranged opposite to the main transport belt, do not fall. The holding belt consists of a holding belt that holds down the load, so that not only when the holding belt is in a horizontal position, but also when it is slanted or rises vertically, The load can be reliably transported. As described above, since the holding belt can be freely changed in the posture and conveyed, compared with the conventional belt conveyor device in which several belt conveyors are arranged in tandem, the installation area can be reduced, and the number of connecting points is significantly reduced. Therefore, it is possible to prevent the quality of the object to be transported such as concrete from deteriorating.

According to a second aspect of the present invention, a movement regulating member is provided on the back side of the main transport belt and the pressing belt to abut against the belts and regulate the movement of the two belts away from each other. Because it is arranged,
Since the belts can be prevented from spreading and the load can be prevented from falling, and the belt movement regulating member is made of a material having a low friction coefficient, the belt movement regulating member and the main transport belt or the holding belt can be prevented. Can be reduced, and it is possible to prevent a situation in which the main transport belt or the pressing belt comes into contact with the belt movement restricting member and a belt driving force with an excessive torque is required.

According to a third aspect of the present invention, the holding belt has a vertical portion extending substantially vertically, and the vertical portion is incorporated in a mast portion of the tower frame. Thereby, it can be transported to a predetermined height vertically upward, that is, a predetermined height of the mast portion of the tower frame. Since the load can be raised vertically in this manner, a relatively narrow space is sufficient for raising the load to a predetermined height.

According to the fourth aspect of the present invention, the tower frame is provided with a climbing mechanism that raises the vertical portion of the holding belt along the mast portion.
As long as the height is within the range allowed by the mast section of the tower frame, the load can be freely transported to a higher ascending position. Therefore, once it is installed, a large setup change becomes unnecessary. As a result, it is suitable for use when a load must be transported to a higher position in accordance with the progress of construction, such as when used for concrete transportation accompanying concrete placement in dam construction.

According to a fifth aspect of the present invention, when the upper portion of the vertical portion of the holding belt is lifted by the climbing mechanism, the holding belt is allowed to move upward, and a predetermined tension is applied to the vertical portion during transport. Since a stretching / tensioning mechanism that gives force is provided, the vertical portion of the holding belt is in a so-called tensioned state with a predetermined tension by the stretching / tensioning mechanism during normal operation. Since it is held, the load can be smoothly conveyed without causing any trouble such as a stagnation of the load on a part of the holding belt. Further, when the upper portion of the vertical portion of the holding belt is raised by the climbing mechanism, the tension by the stretching / tensioning mechanism is temporarily relaxed, and the holding belt can be smoothly fed upward from the ground side.

According to a sixth aspect of the present invention, a main boom portion extending substantially horizontally and capable of turning along a horizontal plane is provided above the mast portion of the tower frame,
The main boom section incorporates a first belt conveyor horizontal section that receives the load conveyed by the sandwiching belt and conveys the load to the front end side of the main boom section. It can be transported to a position as high as the height, and in the horizontal direction, it can be transported over a wide range over the turning range of the tip of the main boom.

According to a seventh aspect of the present invention, a sub-boom is provided at the tip of the main boom so as to be slidable along its length and pivotable along a horizontal plane. Since the second belt conveyor horizontal portion separate from the assembled first belt conveyor horizontal portion is assembled, the degree of freedom in transporting the load to a desired position is increased, and the operation related to the transport of the load is performed. The nature increases.

[Brief description of the drawings]

FIG. 1 is a schematic side view of a belt conveyor device showing an embodiment of the present invention.

FIG. 2 is a schematic plan view of a belt conveyor device showing an embodiment of the present invention.

FIG. 3 is an enlarged side view of a main part of the belt conveyor device showing the embodiment of the present invention.

FIG. 4 is an exploded perspective view showing a sandwiching belt of the belt conveyor device.

FIG. 5 is a side view of the sandwiching belt of the belt conveyor device.

FIG. 6 is a view taken along line VI-VI of FIG. 5;

FIG. 7 is a view taken along line VII-VII of FIG. 6;

FIG. 8 is an exploded perspective view of a vertical portion of the sandwiching belt of the belt conveyor.

9A is a cross-sectional view illustrating a state in which a load is being conveyed by a vertical portion of the sandwiching belt of the belt conveyor, and FIG. 9B is a sectional view illustrating a state in which the load of the vertical portion of the sandwiching belt of the belt conveyor is empty. FIG.

FIGS. 10 (a) to (d) are (a) to (a) of FIG. 2;
It is each corresponding arrow view along (d)-(d).

FIG. 11 is a side view showing a belt drive booster mechanism of the belt conveyor device.

FIG. 12 is a cross-sectional view illustrating a belt drive booster mechanism of the belt conveyor device.

FIG. 13 is a side view showing a method of cleaning the main transport belt of the sandwiching belt of the belt conveyor device.

FIG. 14 is a cross-sectional view illustrating a method of cleaning the main transport belt of the sandwiching belt of the belt conveyor device.

FIG. 15 is a cross-sectional view illustrating a method of cleaning the main transport belt of the sandwiching belt of the belt conveyor device.

FIG. 16 is a side view showing a method of cleaning a holding belt of a holding belt of the belt conveyor device.

FIG. 17 is a cross-sectional view illustrating a method of cleaning the holding belt of the sandwiching belt of the belt conveyor device.

FIG. 18 is a side view showing an example of a conventional belt conveyor device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Belt conveyor device 2 Belt conveyor main body 3 Tower frame 4 Mast part 5 Main boom 6 Sub boom 8 Vertical part 9 Horizontal part 10 Horizontal part 13 Nipping belt 16 Main transport belt 17 Pressing belt 19 Flat belt main body 20 Wavy ear bar 22 Flat Belt body 23 Partition plate part 24 Side beam part 26 Belt movement restricting member 27 Mounting seat 31 Belt drive booster mechanism 40 Revolving body 44 Mast component material lifting device 45 Climbing mechanism 47 Stretching / tensioning device 48 Stay 55 Crane device C Concrete (load)

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Narumi Sato 1-3-2 Shibaura, Minato-ku, Tokyo Shimizu Corporation (72) Inventor Naoki Tarumi 1-2-3 Shibaura, Minato-ku, Tokyo Shimizu Corporation (72) Inventor Kazuo Miyazawa 1-3-2 Shibaura, Minato-ku, Tokyo Shimizu Corporation Shimizu Corporation (72) Inventor Tohru 4-26-14 Yoshino, Fukushima-ku, Osaka-shi, Osaka Yoshino Rubber Industries Co., Ltd. In-company (72) Inventor Naoaki Kuroda 2-6-6 Yokotsutsumi, Tsurumi-ku, Osaka-shi, Osaka F-term in Kurodatech Co., Ltd. 3F023 AA01 AB01 BA01 BA09 BB06 BC04 BC08 EA05 3F024 CA04 DA02 DA04 DA07 3F025 AA12 CA01 CB01

Claims (7)

[Claims] 1. A holding belt, comprising: a main conveyor belt and a presser belt disposed opposite to the main conveyor belt and configured to hold the conveying material stacked on the main conveyor belt so as not to fall. A belt conveyor device comprising: 2. A belt movement made of a material having a low coefficient of friction, on the back side of the main transport belt and the pressing belt, which restricts movement of the two belts in contact with the belts and away from each other. The belt conveyor device according to claim 1, wherein a regulating member is provided. 3. The belt conveyor device according to claim 1, wherein the holding belt includes a vertical portion extending substantially vertically, and the vertical portion is incorporated in a mast portion of the tower frame. 4. The belt conveyor device according to claim 3, wherein a climbing mechanism that raises a vertical portion of the holding belt along a mast portion is attached to the tower frame. 5. An extension for allowing the upper portion of the vertical portion of the holding belt to be raised when the upper portion of the vertical portion of the holding belt is raised by the climbing mechanism, and for giving the vertical portion a predetermined tension during conveyance. The belt conveyor according to claim 4, further comprising a tension mechanism. 6. A main boom portion extending substantially horizontally and rotatable along a horizontal plane is provided on an upper portion of a mast portion of the tower frame, and the main boom portion is conveyed by the holding belt. The belt conveyor device according to claim 3, further comprising a first belt conveyor horizontal portion that receives the load and conveys the load to the front end side of the main boom portion. 7. A sub-boom is provided at the tip of the main boom so as to be slidable along its length and pivotable along a horizontal plane. The sub-boom is provided with a first boom mounted on the main boom. 7. The belt conveyor device according to claim 6, wherein a second belt conveyor horizontal portion separate from said belt conveyor horizontal portion is assembled.