JP7041007B2 - Roller unit for supporting rubber belts on continuous belt conveyors - Google Patents

Description

The present invention relates to a roller unit for supporting a rubber belt that supports a rubber belt of a continuous belt conveyor that carries out excavation shear generated by excavation of a face in a tunnel to a wellhead.

In tunnel construction, when excavation scraps generated by excavation of the face are transported to the entrance by a continuous belt conveyor, crushers and tailpiece carts are placed on one side of the tunnel in the width direction from the face to the well in that order. Arrange and extend a continuous conveyor belt from the tailpiece trolley to the tunnel.
The excavation scrap generated at the face is thrown into the crusher by the wheel loader, and the excavation scrap crushed by the crusher is loaded from the crusher onto the continuous belt conveyor.
The slip loaded on the continuous belt conveyor is conveyed from the tailpiece trolley toward the entrance by the continuous belt conveyor.

Japanese Unexamined Patent Publication No. 2017-190664

By the way, in tunnel construction, it is necessary to advance the tailpiece carriage in response to the advance of the face due to excavation work, and therefore, it is necessary to extend the continuous belt conveyor forward in accordance with the advance of the tailpiece carriage.
The continuous belt conveyor includes a rubber belt, a roller for supporting the rubber belt that supports the rubber belt, and a frame that rotatably supports the roller for supporting the rubber belt. The frame has a length of, for example, about 3 m. ..
When stretching a continuous belt conveyor, for example, a frame of 3 m unit is added, which requires a large-scale work and requires about one day of work time, which is an improvement in improving the efficiency of tunnel excavation work. There is room.
The present invention has been devised in view of the above circumstances, and an object of the present invention is to provide a roller unit for supporting a rubber belt of a continuous belt conveyor, which is advantageous in increasing the efficiency of tunnel excavation work.

In order to achieve the above object, the invention according to claim 1 is a roller unit for supporting a rubber belt that supports a rubber belt of a continuous belt conveyor that carries out excavation shear generated by excavation of a face in a tunnel from a tailpiece carriage to a wellhead. The rubber belt supporting roller unit includes a frame, a single carrier roller that supports a carrier portion of the rubber belt that carries excavation scraps from the tailpiece carriage to the wellhead, and the tailpiece carriage that returns from the wellhead. Consisting with a single return roller that supports the return portion of the rubber belt, the frame has an elongated shape and is detachably coupled to a tunnel-side joint provided on the tunnel wall at one end in its longitudinal direction. A frame-side outer coupling portion is provided, and a frame-side inner coupling portion is provided at the other end in the longitudinal direction in which the lower end of a rod suspended from the ceiling is detachably coupled. The carrier roller and the return roller are rotatably supported by the frame at a position above the return roller, and are located below the carrier roller at a position of the frame located near the frame side outer coupling portion. It is characterized in that a loading / unloading portion is provided so that the return portion can be inserted / removed above the return roller.
According to the second aspect of the present invention, the frame includes a lower frame that rotatably supports the return roller, an upper frame that rotatably supports the carrier roller above the return roller, and a lower frame and an upper frame thereof. The lower frame has an elongated shape, the frame side outer coupling portion is provided at one end in the longitudinal direction thereof, and the frame is provided at the other end in the longitudinal direction thereof. A side joint portion is provided, and the pair of legs extend in the vertical direction on both sides in the longitudinal direction of the return roller to connect the lower frame and the upper frame, and the pair of legs Of the legs located closer to the outer joint on the frame side, one end in the longitudinal direction is rotatably supported by either the upper frame or the lower frame, and the other end in the longitudinal direction is the upper frame or the upper frame. It is characterized in that it is detachably coupled to the other side of the lower frame to form the attachment / detachment portion.
According to a third aspect of the present invention, the return roller is supported at the center of the lower frame in the longitudinal direction, the upper frame has a length shorter than that of the lower frame, and the center of the lower frame in the longitudinal direction. It is characterized by being arranged above.
According to a fourth aspect of the present invention, the carrier roller is a central roller horizontally arranged in the center of the upper frame in the longitudinal direction, and an inclined side arranged on both sides of the central roller and rising as the distance from the central roller is increased. It is characterized by being composed of a part roller.
In the invention according to claim 5, the tunnel side joint portion is attached to the tunnel wall surface via an anchor bolt, and the frame side outer joint portion can be engaged with and detached from the tunnel side joint portion via a bolt. It is characterized by being bound to.

According to the invention of claim 1, since a plurality of roller units separated from each other are provided, when the continuous belt conveyor is stretched by the tailpiece carriage, the number of roller units is installed according to the stretch length of the continuous belt conveyor. However, it may be removed, which is advantageous in smoothly extending the continuous belt conveyor and in improving the efficiency of tunnel excavation work.
According to the second aspect of the present invention, the roller unit can be easily installed and removed, which is advantageous in improving the efficiency of tunnel excavation work.
According to the third aspect of the present invention, it is advantageous in terms of simplifying and reducing the weight of the structure of the roller unit.
According to the invention of claim 4, it is advantageous in smoothly transporting the excavation scrap by the continuous belt conveyor.
According to the fifth aspect of the present invention, the roller unit can be easily installed and removed, which is advantageous in improving the efficiency of the tunnel excavation work.

It is a perspective view which shows the inside of a tunnel when the excavation shaving is discharged in the tunnel by using the roller unit for supporting the rubber belt of the continuous belt conveyor of embodiment. It is sectional drawing which broke the tunnel in the plane orthogonal to the longitudinal direction. It is a perspective view of the roller unit for supporting a rubber belt of a continuous belt conveyor. It is explanatory drawing which shows the coupling state of the frame side outer coupling part and the tunnel side coupling part of the rubber belt support roller unit of a continuous belt conveyor.

Next, an embodiment of the present invention will be described with reference to the drawings.
As shown in FIG. 1, a crusher 12, a tailpiece carriage 14, and a catenary carriage 16 are arranged in this order on one side of the tunnel 10 in the width direction from the face to the wellhead.
The excavated shavings excavated by the face are transported to the crusher 12 by a work vehicle such as a wheel loader 18, the excavated shavings are crushed by the crushed portion of the crusher 12, and are conveyed toward the tailpiece trolley 14 by the crusher conveyor 1202.

On one side of the tunnel 10 in the width direction, a continuous belt conveyor 20 for transporting excavated shavings excavated by a face extends from a tailpiece bogie 14 to a catenary bogie 16 and extends over an entrance.
The continuous belt conveyor 20 includes a rubber belt 22, a carrier roller, and a return roller.
The rubber belt 22 has a carrier portion 22A traveling toward the wellhead and a return portion 22B traveling toward the tailpiece carriage below the carrier portion 22A.
The carrier roller guides the carrier portion 22A, and is composed of a horizontally arranged central roller and inclined side rollers arranged on both sides of the central roller and increasing as the distance from the central roller increases, and the carrier portion 22A has a width. The central part in the direction is dented so that the excavation scrap can be smoothly transported.

As shown in FIG. 1, the tailpiece carriage 14 is self-propelled, and the tailpiece carriage 14 is provided with a tailpiece portion that folds the return portion 22B of the rubber belt 22 back to the carrier portion 22A.
The carrier portion 22A of the continuous belt conveyor 20 provided on the tailpiece carriage 14 has an inclined portion 2202 that rises from the tailpiece portion toward the entrance, and a horizontal portion 2204 that follows the inclined portion 2202.
A hopper 1402 is provided at the lower part of the carrier portion 22A of the continuous belt conveyor 20 provided on the tailpiece carriage 14, and the excavation scraps conveyed by the crusher conveyor 1202 are put into the hopper 1402 and conveyed to the entrance side by the carrier portion 22A. Will be done.

The catenary trolley 16 is arranged at a position distant from the tailpiece trolley 14 on the wellhead side, and can travel by the wheels 1602.
Similar to the tailpiece carriage 14, the portion of the continuous belt conveyor 20 provided on the catenary carriage 16 includes a carrier roller and a return roller in addition to the rubber belt 22.
The location of the continuous belt conveyor 20 provided on the catenary carriage 16 is such that 16 locations of the catenary carriage near the tailpiece carriage 14 extend horizontally at the same height as the upper end of the inclined portion 2202 provided on the tailpiece carriage 14. It is composed of a part 2210.
Further, the portion of the continuous belt conveyor 20 following the end of the horizontal portion 2210 on the wellhead side is composed of an inclined portion 2212 having an inclination that descends toward the entrance.
Further, the location of the continuous belt conveyor 20 provided on the catenary carriage 16 is a horizontal portion 2214 extending horizontally in the vicinity of the tunnel floor surface 10A following the lower end of the inclined portion 2212 at the end portion of the catenary carriage 16 on the wellhead side. It is configured.
Between the catenary carriage 16 and the wellhead, the continuous belt conveyor 20 is supported on the tunnel floor surface 10A in the vicinity of the tunnel floor surface 10A and extends in the horizontal direction.

The distance between the tailpiece carriage 14 and the catenary carriage 16 is 50 m to 300 m in this embodiment, and the continuous belt conveyor 20 is supported by the tunnel wall surface 10B between the tailpiece carriage 14 and the catenary carriage 16 and is supported by each other. It extends linearly by a plurality of separated roller units 24.
As shown in FIGS. 2 and 3, the roller unit 24 is rotatably supported by the frame 26, a single return roller 28 rotatably supported by the frame 26, and above the return roller 28 by the frame 26. It is configured to include a single carrier roller 30 and the like.
The frame 26 includes a lower frame 32, an upper frame 34, and a pair of legs 36 connecting the lower frame 32 and the upper frame 34.

The lower frame 32 has an elongated shape and rotatably supports a single return roller 28 via a support piece 3202 at the central portion in the longitudinal direction thereof.
The axial center of the return roller 28 extends in the longitudinal direction of the lower frame 32, and the return roller 28 is arranged at the center of the lower frame 32 in the width direction.
A frame-side outer coupling portion 38 is provided at one end in the longitudinal direction of the lower frame 32, and a frame-side inner coupling portion 40 is provided at the other end in the longitudinal direction thereof.
As shown in FIG. 4, the frame-side outer coupling portion 38 is a portion that is detachably coupled to the tunnel-side coupling portion 42 provided on the tunnel wall surface 10B.
The tunnel-side coupling portion 42 has a mounting plate 4202 attached to the tunnel wall surface 10B via anchor bolts and a pair of angle members 4204 attached to the mounting plate 4202 and each having a bolt insertion hole 4204A.
The frame side outer coupling portion 38 has a coupling plate portion 3802 having a female screw 3802A corresponding to the bolt insertion hole 4204A of the pair of angle members 4204, and the bolt N1 through which the pair of angle members 4204 is inserted is screwed into the female screw 3802A. As a result, the frame-side outer coupling portion 38 and the tunnel-side coupling portion 42 are detachably coupled to each other.
As shown in FIGS. 2 and 3, the frame-side inner coupling portion 40 is a portion where the lower end of the rod 44 suspended from the ceiling is detachably coupled.
In the present embodiment, the frame-side inner coupling portion 40 has a right-hand screw formed at the tip of the rod 4602 projecting from the lower frame 32 and a left-hand screw formed at the lower end of the rod 44 suspended from the ceiling. It is composed of a turnbuckle mechanism including a cylindrical portion 4604 in which female threads corresponding to the right-hand thread and the left-hand thread are formed at both ends of the inner peripheral portion.
The roller unit 24 has a width in the tunnel 10 such that the height H from the tunnel floor surface 10A to the lower surface of the lower frame 32 has a dimension of 5.5 m or more via the tunnel side coupling portion 42 and the rod 44. It is horizontally arranged at the upper part in the tunnel 10 toward one side in the direction.
In FIGS. 1 and 2, reference numeral 19 indicates a drill jumbo as a work vehicle.

The upper frame 34 has a shorter length than the lower frame 32 and is arranged above the center of the lower frame 32 in the longitudinal direction.
A single carrier roller 30 is rotatably supported on the upper frame 34.
Similar to the tailpiece carriage 14, the single carrier roller 30 is supported by the central roller 3002 horizontally arranged by the support piece and the support pieces 3402 and 3404 on both sides of the central roller 3002 and rises as it moves away from the central roller 3002. It is composed of an inclined side roller 3004, and the carrier portion 22A is designed so that the central portion in the width direction is recessed and the excavation shear is smoothly conveyed.

The pair of legs 36 extend vertically on both sides of the return roller 28 in the longitudinal direction and connect the lower frame 32 and the upper frame 34.
Of the pair of legs 36, the upper portion of the leg portion 36 on the tunnel side coupling portion 42 side is rotatably supported by the upper frame 34, and the lower end thereof is rotatably coupled to the lower frame 32. That is, a bolt insertion hole is formed at the lower end of the leg portion 36 on the tunnel side joint portion 42 side, and the bolt inserted through the bolt insertion hole is screwed into the female screw of the lower frame 32 to form the lower end portion of the leg portion 36. Is detachably coupled to the lower frame 32.
Therefore, the leg 36 on the tunnel side joint 42 side of the pair of legs 36 can be opened and closed, and the leg 36 on the tunnel side joint 42 side of the pair of legs 36 is below the carrier roller 30. Above the return roller 28, a loading / unloading section 37 that allows the return section 22B of the rubber belt 22 to be inserted / removed is configured.
Various conventionally known opening / closing structures can be applied to the structure of the attachment / detachment portion 37, but the above-mentioned configuration is advantageous in terms of simplifying and reducing the weight of the structure.

Therefore, when the continuous belt conveyor 20 is extended by the tailpiece carriage 14, the lower end of the leg portion 36 of the tunnel side joint portion 42 is swung upward at the position of the continuous belt conveyor 20 on the wellhead side of the tailpiece carriage 14. The roller unit 24 is inserted so that the return portion 22B of the rubber belt 22 is inserted between the lower frame 32 and the upper frame 34 from the attachment / detachment portion 37, and the carrier portion 22A of the rubber belt 22 is located on the carrier roller 30. It is moved horizontally toward the tunnel wall surface 10B, and after the movement, the lower end of the leg portion 36 on the tunnel side coupling portion 42 side is coupled to the lower frame 32, and the tunnel side coupling portion 42 and the frame side outer coupling portion 38 are coupled. At the same time, the work of connecting the connecting portion 40 on the frame side to the rod 44, suspending it by the rod 44, and attaching the roller unit 24 is performed.
Further, at the position of the continuous belt conveyor 20 on the face side of the catenary carriage 16, the frame side outer coupling portion 38 of the roller unit 24 already attached to the tunnel side coupling portion 42 is removed, and the rod 44 is removed from the frame side inner coupling portion 40. It is removed, the lower end of the leg portion 36 on the tunnel side joint portion 42 side is swung upward, and the roller unit 24 is horizontally moved in the direction away from the tunnel wall surface 10B. As a result, the return portion 22B of the rubber belt 22 is taken out from the attachment / detachment portion 37, and the removal work of the roller unit 24 is completed.

According to the present embodiment, since the plurality of roller units 24 separated from each other are provided, when the continuous belt conveyor 20 is extended by the tailpiece trolley 14, at the position of the continuous belt conveyor 20 on the wellhead side of the tailpiece trolley 14. , The roller units 24 may be installed in an number corresponding to the extension length of the continuous belt conveyor 20, and the roller units 24 may be removed at the continuous belt conveyor 20 on the face side of the catenary trolley 16 continuously. It is advantageous in smoothly performing the stretching work of the belt conveyor 20, and is advantageous in improving the efficiency of the tunnel excavation work.
That is, conventionally, it has been necessary to add a frame of the continuous belt conveyor 20, for example, a frame of 3 m unit according to the advance of the tailpiece carriage 14. Therefore, in order to stretch the rubber belt 22 of the continuous belt conveyor 20, the stretching device including the hydraulic device for adding the frame of the continuous belt conveyor 20, and the rubber belt 22 are tensioned with the addition of the frame of the continuous belt conveyor 20. A large-scale work of adding a frame using a tensioning device including a hydraulic device is performed, and it takes about one day.
Therefore, conventionally, the tailpiece carriage 14 is advanced once a week (or two weeks) to extend the continuous belt conveyor 20, and each time the continuous belt conveyor 20 is stopped, a large-scale work of adding a frame is performed. Is doing.
On the other hand, the face moves forward every day with the excavation work.
Since the advance of the tailpiece trolley 14 is restricted to about once every one or two weeks, the crusher 12 must stay in a position adjacent to the front of the tailpiece trolley 14, and excavation from the face must be performed. There is a disadvantage that the mileage of the wheel loader 18 carried to the crusher 12 becomes longer every day.
On the other hand, since the present invention uses a plurality of roller units 24 separated from each other, the stretching work of the continuous belt conveyor 20 is not restricted to the frame length unit as in the conventional case, and the work is, for example, about 30 minutes. Since the continuous belt conveyor 20 can be stretched in units of 1 m per hour, the continuous belt conveyor 20 can be stretched once a day, and the tailpiece carriage 14 and the crusher 12 can be advanced each time.
Therefore, the distance between the crusher 12 and the face can be shortened as compared with the conventional case, the mileage of the wheel loader 18 can be suppressed from becoming long, the mileage can be kept constant, and the transportation efficiency of excavation scraps from the face by the wheel loader 18 can be improved. It is advantageous to increase it.
Further, conventionally, since the inclination of the continuous belt conveyor 20 can be set only in units of frame length, for example, in units of 3 m, there is a disadvantage that the degree of freedom in design regarding the inclination of the continuous belt conveyor 20 is restricted.
On the other hand, in the present embodiment, since the roller units 24 are separated from each other, the inclination of the continuous belt conveyor 20 can be freely set for each roller unit 24, so that the design of the continuous belt conveyor 20 can be freely set. It is advantageous in securing the degree.

10 Tunnel 10B Tunnel wall surface 14 Tailpiece trolley 20 Continuous belt conveyor 22 Rubber belt 22A Carrier part 22B Return part 24 Roller unit 26 Frame 28 Return roller 30 Carrier roller 3002 Central roller 3004 Side roller 32 Lower frame 34 Upper frame 36 Leg 37 Departure 38 Frame side outer joint 40 Frame side inner joint 42 Tunnel side joint 44 Rod N1 Bolt

Claims (5)

A roller unit for supporting a rubber belt that supports the rubber belt of a continuous belt conveyor that carries out excavation scraps generated by excavation of a face in a tunnel from a tailpiece carriage to a wellhead.
The rubber belt support roller unit includes a frame, a single carrier roller that supports a carrier portion of the rubber belt that carries excavation scraps from the tailpiece carriage to the wellhead, and a return of the rubber belt that returns from the wellhead to the tailpiece carriage. Consists of including a single return roller to support the part,
The frame has an elongated shape, and at one end in the longitudinal direction thereof, a frame-side outer coupling portion that is detachably coupled to the tunnel-side coupling portion provided on the tunnel wall surface is provided, and at the other end in the longitudinal direction thereof. , A frame-side internal joint is provided to connect the lower end of the rod suspended from the ceiling so that it can be detached.
The carrier roller is arranged above the return roller, and the carrier roller and the return roller are each rotatably supported by the frame.
At the position of the frame located near the outer coupling portion on the frame side, a mounting / detaching portion is provided below the carrier roller and above the return roller so that the return portion can be inserted / removed.
A roller unit for supporting the rubber belt of a continuous belt conveyor. The frame includes a lower frame that rotatably supports the return roller, an upper frame that rotatably supports the carrier roller above the return roller, and a pair of legs connecting the lower frame and the upper frame. Consists of including and
The lower frame has an elongated shape, and the frame-side outer coupling portion is provided at one end in the longitudinal direction thereof, and the frame-side inner coupling portion is provided at the other end in the longitudinal direction thereof.
The pair of legs extend vertically on both sides of the return roller in the longitudinal direction to connect the lower frame and the upper frame.
Of the pair of legs, the leg located closer to the frame-side outer coupling portion has one end in the longitudinal direction rotatably supported by one of the upper frame and the lower frame, and the other in the longitudinal direction. The ends are detachably coupled to the upper frame or the other of the lower frames to form the attachment / detachment portion.
The roller unit for supporting a rubber belt of the continuous belt conveyor according to claim 1. The return roller is supported at the center of the lower frame in the longitudinal direction.
The upper frame has a shorter length than the lower frame and is arranged above the center in the longitudinal direction of the lower frame.
2. The roller unit for supporting a rubber belt of a continuous belt conveyor according to claim 2. The carrier roller is composed of a central roller horizontally arranged in the center of the upper frame in the longitudinal direction and a side roller having an inclination arranged on both sides of the central roller and rising as the distance from the central roller increases. ,
The roller unit for supporting a rubber belt of the continuous belt conveyor according to claim 2 or 3. The tunnel side joint is attached to the tunnel wall surface via anchor bolts.
The frame-side outer coupling portion is detachably coupled to the tunnel-side coupling portion via a bolt.
The roller unit for supporting a rubber belt of a continuous belt conveyor according to any one of claims 1 to 4.

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