JP3526006B2 - Belt conveyor booster unit - Google Patents

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention mainly relates to several kilometers or more.
The present invention relates to a booster unit used in a long belt conveyor of several tens of kilometers.

[0002]

2. Description of the Related Art A belt conveyor is a carrying machine that has been widely used in the fields of civil engineering and construction, and as an object to be carried, it covers a wide range such as aggregate, cement, and excavated shear.
Many of the old ones were portable, with a transport distance of several meters.

On the other hand, for example, when transporting and carrying out excavation shear generated in the excavation work of a mountain tunnel, a rail system combining a locomotive and a toro, or a tire system using a vehicle such as a dump truck has been the mainstream. The method has a problem that it requires a high cost to maintain and maintain the rail, and the tire method has problems such as entrance and exit, replacement of actual and empty vehicles, and direction change, which can only be used in large-section tunnels.

Under such circumstances, recently, a large belt conveyor having a length of several tens of kilometers capable of transporting a large amount of soil over a long period of time without manpower has been developed.

If such a belt conveyor is used, the excavation shear can be carried out at a lower cost and higher efficiency than the conventional rail system or tire system, depending on the scale of the tunnel.

In a belt conveyor, an endless belt is generally hung on both ends of a tail pulley and a head pulley, and the belt is supported by idlers arranged at intervals of several meters. In many cases, a belt driving motor is provided to support this and to be provided on the nose side or the cargo side (tail end side).

Here, the machine length of the belt conveyor is several tens of kilometers.
However, it is not enough to install a belt drive motor on the nose or tail end side, and an intermediate drive device called a booster drive or booster unit for driving the belt at an intermediate position, for example, every several km is required. Becomes

FIG. 4 is a view of the conventional booster unit 1 arranged in the tunnel cross section as seen from the nose side. As can be seen in the figure, in such booster unit 1,
After hanging the belt 3 on the drive pulley 2 for intermediate drive, send it once to the tail end side (the other side in the figure) and hang it on the belt pressing pulley (not shown), and then again put it on the nose side (the same). The belt 3 is returned to the front side in the figure), and the intermediate drive motor 2 (not shown) is rotatably driven by the intermediate drive drive pulley 2 via the transmission mechanism 4 to intermediately drive the belt 3 and the belt. At the intermediate drive drive pulley 2, the excavation shear 5 conveyed by the above is once dropped to the lower nose side (lower front side in the figure), and then the belt is sent from the other side of the belt pressing pulley. It is possible to replace it with 3.

[0009]

However, in such a booster unit 1, when the excavation shear 5 conveyed by the belt 3 falls to the lower nose side, it is inevitably spread while spreading on both sides, and therefore falls. In addition, the excavation skid 5 cannot be completely received by the belt 3 coming out from the other side of the belt pressing pulley, and a part thereof is spilled on both sides of the booster unit 1.

The problem is that the spilled excavation must be returned to the belt 3 by the operator's hand, which requires extra manpower, and the earth and sand scattered at the time of dropping into the drive mechanism etc. It causes a situation such as a breakdown.

The present invention has been made in consideration of the above-mentioned circumstances, and provides a booster unit for a belt conveyor capable of surely replacing a conveyed object such as an excavation carried by a belt without spilling. The purpose is to do.

[0012]

In order to achieve the above object, a booster unit of a belt conveyor according to the present invention has an intermediate drive drive pulley and a lower portion of the intermediate drive drive pulley as described in claim 1. A belt pressing pulley arranged on the tail end side, and drive means connected to the intermediate drive drive pulley via a predetermined transmission mechanism for rotationally driving the intermediate drive drive pulley. The belt driven to rotate by the drive pulley is configured to be sent to the nose side via the belt pressing pulley, and the intermediate drive drive pulley has a cross-sectional diameter at the belt center position at both belt edge positions. It is formed so as to be smaller than the cross-sectional diameter in.

Further, the booster unit of the belt conveyor according to the present invention is such that the intermediate drive pulley is formed in a drum shape.

Also in the booster unit of the belt conveyor according to the present invention, the transported material such as excavated shear carried by the belt is once dropped to the lower nose side at the intermediate drive drive pulley as in the conventional case. Later, it is replaced with the belt coming out from the other side of the belt pressing pulley.However, in the booster unit of the belt conveyor according to the present invention, such a drive pulley for intermediate drive has a cross-sectional diameter at the belt central position of the belt both edge positions. It is formed so as to be smaller than the cross-sectional diameter in the above, and the belt is forcibly bent and deformed on the intermediate drive drive pulley.

Therefore, the belt that has carried the conveyed material such as excavated shear becomes curved downward as it approaches the drive pulley for intermediate drive, and accordingly, the conveyed material such as excavated shear loaded on the belt is , The belt is moved to the center position.

The transmission mechanism includes a chain and a sprocket,
It may be appropriately selected from a belt and a pulley, a gear group, or the like, and an electric motor or a hydraulic motor can be used as the driving unit.

The intermediate drive drive pulley may have any degree of curvature and structure as long as the cross-sectional diameter at the belt center position is smaller than the cross-sectional diameter at both belt edge positions. For example, it is conceivable that a large number of drive plates having various outer diameters are coaxially arranged in parallel so that their outer diameters gradually increase from the center to both edges.

If the intermediate drive pulley is formed in a drum shape, the belt and the peripheral surface of the intermediate drive pulley closely contact each other, so that the rotational force from the drive mechanism is not wasted. Can be transmitted to the drive pulley for driving.

[0019]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a belt conveyor booster unit according to the present invention will be described below with reference to the accompanying drawings. It should be noted that parts and the like which are substantially the same as those of the conventional technique are designated by the same reference numerals and the description thereof is omitted.

FIG. 1 is an overall view showing a booster unit of a belt conveyor according to this embodiment. As can be seen from the figure, the booster unit 11 of the belt conveyor according to the present embodiment includes a drive pulley 12 for intermediate drive.
And a belt pressing pulley 13 arranged on the lower tail end side (lower right side in the figure) of the intermediate drive drive pulley,
A drive mechanism 14 as a drive unit for rotationally driving the intermediate drive drive pulley 12, and the intermediate drive drive pulley 1.
2 and the transmission mechanism 15 interposed between the drive mechanism 14 and the drive mechanism 14. The belt 24 travels on the idler 25 in the direction of the arrow in the figure and is driven to rotate counterclockwise by the drive pulley 12 for intermediate drive. After being conveyed, it is sent to the nose side (left side in the figure) via the belt pressing pulley 13, and after rotating around a head pulley (not shown), travels on the return roller 26 in the direction of the arrow in the figure to the tail end side. And the idler 2 again around the tail pulley (not shown) provided on the tail end side.
The endless structure is provided so as to return to the top.

Here, the belt pressing pulley 13 functions as a pulley for pressing the belt 24 against the peripheral surface of the intermediate driving drive pulley 12 with a predetermined force, and the driving mechanism 14 from the driving mechanism 14 through the transmission mechanism 15. It is adapted to be rotationally driven in the opposite direction (clockwise) to the drive pulley 12 for intermediate drive by the rotational force, and also functions as a second drive pulley for intermediate drive that drives the belt 24.

The drive mechanism 14 includes an electric motor 19 and a speed reducer 20.
The rotation output from the electric motor 19 can be transmitted to the transmission mechanism 15 at a desired rotation speed.

As is apparent from the detailed front view of FIG. 2, the intermediate drive drive pulley 12 is formed in a drum shape so that the cross-sectional diameter at the belt center position is smaller than the cross-sectional diameter at both belt edge positions. I am doing it.

At the lower position of the intermediate drive drive pulley 12, as can be seen from FIG. 1 (a), the excavation slide 5 dropped from the intermediate drive drive pulley 12 does not spill from the side. Thus, skirts 28, 28 are arranged so as to cover both edges of the belt 24, and a scraper 27 for scraping off mud and the like adhering to the surface of the belt 24 is provided below the intermediate drive pulley 12. Has been placed.

In the booster unit 11 of the belt conveyor according to this embodiment, the electric motor 1 of the drive mechanism 14 is used.
9, the rotation output thereof is transmitted to the transmission mechanism 15 via the speed reducer 20, and then the intermediate drive drive pulley 12 is rotated via the transmission mechanism to drive the belt 24. The drive pulley 12 is formed in a drum shape so that the cross-sectional diameter at the belt center position is smaller than the cross-sectional diameter at both belt edge positions.

Therefore, the belt 24 which has carried the excavated shear 5 which is a product, as can be seen clearly in FIG. 1 (b),
As it approaches the intermediate drive pulley 12, it becomes curved downward, and accordingly, the excavation shear 5 loaded on the belt is moved to the center position of the belt.

The excavation slide 5 is, as shown in FIG.
While being brought close to the center position on the belt 24, it falls from the intermediate drive drive pulley 12 to the lower side of the nose. That is, the excavation shear 5 is dropped in a state where the falling width is narrowed, and thus most of it is surely replaced on the belt 24 coming out from the belt pressing pulley 13 and, as in the conventional case, both sides thereof. Almost no fear of spilling.

As described above, according to the booster unit 11 of the belt conveyor according to the present embodiment, the excavation shear 5 conveyed by the belt 24 is once moved downward at the intermediate drive drive pulley 12 as in the conventional case. It is dropped to the nose side, and then the belt pressing pulley 13
In the booster unit 11 of the belt conveyor according to the present embodiment, the intermediate drive drive pulley 12 is formed in an hourglass shape and has a cross-sectional diameter at the belt center position. Is smaller than the cross-sectional diameter at both belt edge positions,
The excavation shear 5 placed on the belt 24 can be brought close to the center position of the belt and dropped in this state to the lower nose side.

Therefore, it is possible to prevent a situation in which a part of the excavation spill is spilled on both sides of the booster unit, which causes a failure of the drive mechanism, and in which a worker must return the spilled excavation slip to the belt. It becomes possible.

Further, according to the booster unit 11 of the belt conveyor according to the present embodiment, since the drive pulley 12 for intermediate drive is formed in a drum shape, the belt 24 is intermediately driven while being bent and deformed downward. The drive drive pulley 12 can be closely attached to the peripheral surface of the drive drive pulley 12, and the rotational force from the drive mechanism 14 can be transmitted to the intermediate drive drive pulley 12 without waste.

In the present embodiment, the intermediate drive drive pulley is formed in a drum shape, but in the intermediate drive drive pulley of the present invention, the cross-sectional diameter at the belt central position is, in short, smaller than the cross-sectional diameter at the belt both edge positions. Any shape may be used as long as it is small. For example, as shown in FIG. 3, a large number of circular drive plates 31 having various diameters are coaxially arranged in parallel so that their diameters gradually increase from the center to both edges, and the intermediate drive drive pulley 32 is provided. May be

In such a structure, there is a concern that the rotational drive energy may be lost due to the reduced contact with the belt 24, but the drive pulley 3 for intermediate drive is relatively low in cost.
2 has the advantage that it can be configured.

Further, in this embodiment, the belt 24 is used in the general conveying section (conveying section before the booster unit).
However, if the idler pulley 25 imparts a downwardly curved trough angle to the belt 24 in this section, the curved state of the belt 24 due to the trough angle is maintained as it is. Thus, the drum-shaped cross section of the drive pulley 12 for intermediate drive can be formed.

In such a structure, the excavation slide 5 which is moved to the center of the belt due to the trough angle in the general transport section can be dropped from the intermediate drive drive pulley 12 to the nose side as it is, and as described above. The same effect as can be expected.

The belt 2 with the idler pulley 25
The provision of the trough angle to 4 is a structure that has been conventionally adopted to prevent the excavation shear 5 from falling sideways during conveyance, but in the conventional case, the intermediate drive drive pulley has a substantially cylindrical shape. Due to the structure, the belt to which the trough angle was given became flat in front of the drive pulley for intermediate drive, which caused the excavation shear that had been centered until then to collapse to the side, Since it fell to the nose side while maintaining the collapsing momentum, there was a problem that a considerable amount of excavation slip was spilled on both sides of the booster unit without being transferred to the belt.

However, according to the booster unit 11 of the belt conveyor according to the present invention, the excavation slide 5 that has been moved to the center of the belt 24 in the general conveying section can be dropped to the nose side in that state. The transfer onto the belt 24 that has come out from the belt pressing pulley 13 can be reliably performed.

[0037]

As described above, according to the booster unit of the belt conveyor of the present invention according to the first aspect, the excavation shed mounted on the belt is moved to the center position of the belt, and in this state, the excavation shear is moved to the lower nose side. It is possible to drop it,
It is possible to avoid a situation in which a part of the excavation spill is spilled on both sides of the booster unit, which causes a failure of the drive mechanism, and an operator has to return the belt to the belt.

Further, according to the booster unit of the belt conveyor of the present invention according to the second aspect, it becomes possible to closely fit the peripheral surface of the drive pulley for intermediate drive in a state where the belt is curved and deformed downward. There is also an effect that the rotational force from the drive mechanism can be transmitted to the drive pulley for intermediate drive without waste.

[0039]

[Brief description of drawings]

FIG. 1 is a diagram of a booster unit of a belt conveyor according to the present embodiment, where (a) is an overall plan view and (b) is an overall side view.

FIG. 2 is a front view of the booster unit according to the present embodiment as seen from the direction of line AA in FIG.

FIG. 3 is a front view of a belt conveyor booster unit according to a modification.

FIG. 4 is a front view of a booster unit of a belt conveyor according to a conventional technique.

[Explanation of symbols]

11 Booster Unit 12 Intermediate Drive Drive Pulley 13 Belt Pressing Pulley 14 Drive Mechanism (Drive Means) 15 Transmission Mechanism 24 Belt

─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-7-291419 (JP, A) JP-A-10-109725 (JP, A) JP-A-63-161294 (JP, A) Actual exploitation Sho-57- 116611 (JP, U) (58) Fields surveyed (Int.Cl. ⁷ , DB name) B65G 23/04 B65G 15/08 B65G 23/10 E21D 9/12

Claims (2)

(57) [Claims] 1. A drive pulley for intermediate drive, a belt pressing pulley arranged on the lower tail end side of the drive pulley for intermediate drive, and a drive pulley for intermediate drive, which is connected to the drive pulley for intermediate drive via a predetermined transmission mechanism. A drive means for rotationally driving the intermediate drive drive pulley, wherein the belt rotationally driven by the intermediate drive drive pulley is configured to be sent to the nose side via the belt pressing pulley, A booster unit for a belt conveyor, characterized in that the drive pulley for intermediate drive is formed such that the cross-sectional diameter at the belt central position is smaller than the cross-sectional diameter at the belt both edge positions. 2. The booster unit for a belt conveyor according to claim 1, wherein the drive pulley for intermediate drive is formed in a drum shape.