JP3911648B2 - Sliding conveying method and belt conveyor - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention is a slip transport method suitable for use when transporting a slip generated at a face when excavating a natural ground to construct a tunnel or the like, or transporting a stack of stacks in which the loading position changes every moment. And a belt conveyor.
[0002]
[Prior art]
In general, when excavating a tunnel or a natural ground, a slip generated when blasting, rocking, or splitting a rock surface is carried out by a dump truck or the like.
However, exhaust gas, dust, noise, etc. generated from dump trucks can cause deterioration of the surrounding environment and work environment, and especially during tunnel excavation, the transportation work is interrupted when the dump truck is replaced. Therefore, there is also a problem that the transfer work efficiency is poor.
[0003]
For this reason, in recent years, the use of an electric belt conveyor has been studied, but in order to use a belt conveyor, the gap is crushed into a size that can be conveyed by the belt conveyor in order to carry the gap on the belt conveyor. There is a need to.
The present inventors have already proposed a shear crusher as shown in Japanese Patent Application Laid-Open No. 8-177386 as a technique for crushing a gap in this way and transporting it on a belt conveyor.
[0004]
[Problems to be solved by the invention]
However, in the conventional belt conveyor as described above, for example, in a portion passing through the centle in the tunnel construction, this centle becomes an obstacle and the belt conveyor cannot be arranged linearly, and the centle and the belt conveyor occupy a space. For example, there is a problem that a passage for a worker cannot be secured.
The present invention has been made in consideration of the above points. A slip transport method and a belt conveyor that can not only avoid an obstacle but also secure a required space even in a portion where the obstacle exists. The issue is to provide.
[0005]
[Means for Solving the Problems]
In the invention according to claim 1, in order to convey the slip backward, the slip is loaded in the slip crushing device behind the slip loading means arranged at the foremost part, and after crushing the slip by the slip crushing device, The belt is transferred to the belt conveyor via the self-propelled conveyor, and the belt conveyor conveys the gap to the end through the pipe disposed at the intermediate height position of the leg of the slide center. It is characterized by having a configuration.
[0006]
The invention according to claim 2, a belt conveyor, the belt conveyor, in a portion that passes through the slide Sentoru, the height position of the middle leg of the slide Sentoru the belt conveying side does not interfere with the slide Sentoru It is characterized by being inserted into a tubular body disposed in the.
[0007]
The invention according to claim 3 is the belt conveyor according to claim 2, wherein the belt on the return side of the belt conveyor is guided by the guide member so as to be in a vertical state in a portion passing through the slide centle . It is characterized by that.
[0008]
The invention according to claim 4 is the belt conveyor according to claim 2 or 3, wherein when the slide centile moves forward or backward with the progress of construction, the tube, or the tube and The guide member is integrally attached to the slide center.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an example of an embodiment of a gap conveying method and a belt conveyor according to the present invention will be described with reference to FIGS. 1 to 5. Here, for example, a case where the movable frame and the belt conveyor according to the present invention and the gap conveying method using the same are used for conveying an excavation gap in a tunnel will be described as an example.
FIG. 1 is a plan view showing a configuration of a front portion of a conveying device used in the gap conveying method of the present invention, FIG. 2 is a side view of the same portion, FIG. 3 is a side view of a portion subsequent to FIG. 2, and FIG. FIG. 4B is a side view showing the configuration of the sliding-centre passage portion of the apparatus, FIG. 4B is a cross-sectional view of the same section, and FIG.
[0010]
This slip transport device transports the slip at the foremost part generated at the face (frontmost part) 2 of the tunnel 1 shown in FIG. 1, and the slip loader (slipper) provided for the face 2 of the tunnel 1. Loading means) 11, a self-propelled crusher device (slipping crushing device) 13 deployed subsequent to the slip-loading machine 11, and a self-propelled bridge conveyor (self-propelled) deployed following the self-propelled crusher device 13. The main belt conveyor (belt) integrally extended from the position of the traveling conveyor) 25 and the self-propelled bridge conveyor 25 shown in FIG. 2 to the pit (last part) 100 as the last part as shown in FIG. Conveyor) 30. In addition, a small auxiliary slip loader 12 is also provided in the vicinity of the foremost face 2.
[0011]
As shown in FIGS. 1 and 2, the slip loader 11 has a chain conveyor 11 a for loading on a traveling carriage 11 b, and transports the slip generated at the face 2 to a rear high place, and a self-propelled crusher. Drop on device 13.
[0012]
The self-propelled crusher device 13 includes a crawler-type traveling mechanism 20 and a fixed jack 21 and can be self-propelled and fixed at an arbitrary position. The traveling mechanism 20 can be driven by both an engine or a motor.
[0013]
This self-propelled crusher device 13 is provided with a vibration grizzly feeder 14 at the front, and receives the slip falling from the slip loader 11 here. Of the gaps inserted into the vibratory grizzly feeder 14, the smaller ones are screened out as they are and ride on the belt conveyor 15 disposed below. The larger one is transferred from the vibratory grizzly feeder 14 to the apron feeder 16 disposed at the rear, sent to the horizontal jaw crusher 17 and crushed into small pieces. The horizontal jaw crusher 17 includes a pair of jaws 17a and 17a having a vertical rotating shaft (not shown) and operating in the horizontal direction to sandwich a gap. Then, the crushed gap is combined with the small gap on the belt conveyor 15 disposed below, and is transferred to the front end of the self-propelled bridge conveyor 25 at the rear end portion of the self-propelled crusher device 13.
[0014]
Since a normal jaw crusher has a vertical jaw, the height of the machine is high, and it cannot be put in a narrow space such as in a tunnel. However, this horizontal jaw crusher 17 has a pair of jaws 17a and 17a horizontally. Since it is set to a small height (about 2m), it can even be put in the tunnel. And since it was set horizontally, supply of material is forcibly performed by the apron feeder 16.
[0015]
When all the generated slips are crushed (crushed), it takes time and wastes. However, in this self-propelled crusher device 13, the size of the slip is selected by the vibration grizzly feeder 14 at the stage before crushing, Only the gap larger than the size is crushed, and the gap less than the predetermined size is passed through the vibration grizzly feeder 14 and dropped on the lower belt conveyor 15 as it is, so the crushing time is shortened and the efficiency is high. .
[0016]
The vibratory grizzly feeder 15, the horizontal crusher 17, the belt conveyor 16, and the apron feeder 16 are driven at all times and are electrically driven.
[0017]
As shown in FIGS. 1 and 2, the self-propelled bridge conveyor 25 can be retracted approximately 30 to 50 m rearward at the time of blasting, and can be returned to the original position at the time of transport work. It is mounted on the base 28. Then, by turning the swivel base 28, it can swing in the horizontal direction. Further, the height can be adjusted by the height adjusting jack 29.
[0018]
The self-propelled bridge conveyor 25 is for transferring the gap from the self-propelled crusher device 13 to the main belt conveyor 30, and the rear end is a walking frame provided at the front end of the main belt conveyor 30. It ’s on 35. This rear end support portion is provided with a support pedestal 27 with wheels that can travel in the front-rear direction on a travel rail 31 provided on the walking frame 35. The traveling rail 31 is laid in a predetermined range from the front end of the main belt conveyor 30, and the rear end of the traveling rail 31 can be reliably supported when the self-propelled bridge conveyor 25 is retracted. In FIG. 3, a range indicated by a symbol L is a range in which the support frame 27 moves at the time of blasting, and a stopper 34 is provided at a position further rearward than the range.
[0019]
The main belt conveyor 30 is continuous to the outermost part of the mine with a single belt 32, and the gap can be conveyed to the outside of the mine at a stretch. A walking device 36 is provided at the front portion of the main belt conveyor 30 as an advance mechanism that advances the position of the front portion. The walking device 36 includes a walking frame 35, a walking boot 38, a lifting hydraulic jack 40, and a forward / reverse hydraulic jack 41.
[0020]
The walking device 36 is divided into a front walking device 36A and a rear walking device 36B, and the front walking device 36A and the rear walking device 36B are connected via a vertical movement error absorbing frame 35C. The walking frame 35 is divided into a front walking frame 35A and a rear walking frame 35B corresponding to the front walking device 36A and the rear walking device 36B. The vertical movement error absorbing frame 35C absorbs an error in the vertical movement of the front walking frame 35A and the rear walking frame 35B.
[0021]
Two walking boots 38 are supported by the walking frames 35A and 35B via guide shoes 37 so as to be slidable in the front-rear direction. The front and rear walking boots 38 are connected by a connecting rod 42. The forward / backward hydraulic jack 41 moves the walking boots 38 in the front-rear direction, and the lifting hydraulic jack 40 is disposed in front of and behind the walking frames 35A and 35B.
[0022]
When the walking device 36 is moved forward, the walking frames 35A and 35B are first lifted by the lifting hydraulic jack 40, and the walking boot 38 is lifted from the floor surface. Next, in this state, the walking boot 38 in the floated state is moved forward by driving the forward / backward hydraulic jack 41. After moving to the front side, the walking frames 35A and 35B are lowered by the lifting hydraulic jack 40, and the walking boot 38 is landed on the floor surface. Next, by driving the forward / reverse hydraulic jack 41 in the opposite direction, the walking frames 35A and 35B are advanced by the reaction force. At that time, the walking boot 38 is stretched on the floor surface. When moving forward more than one stroke, advance the required amount by repeating the above operation.
[0023]
The main belt conveyor 30 connected to the wellhead passes through a slide centle 50 provided in the tunnel 1 as shown in FIGS. 4 (a) and 4 (b) . In this passing portion, the conveying belt (conveying belt) 32A of the main belt conveyor 30 is passed through a cylindrical frame (tubular body) 58 provided at a height in the middle of the leg portion 50a of the slide center 50. And is supported by a carrier roller 59 provided in the cylindrical frame 58.
[0024]
Also, in this section, it is difficult to provide a horizontal space corresponding to the belt width in the slide center 50, so that the space is secured by holding the return belt (return side belt) 32B vertically rather than horizontally. ing. In this case, since the section S1 in which the return belt 32B is shifted from the horizontal to the vertical and the section S2 in which the return belt 32B is shifted from the vertical to the horizontal are necessary, the belt 32B is fixed by the correction roller (guide member) 47 attached to the slide center 50 in that section. The direction is changed. By doing so, the slide centle 50 can be used without much difference from normal.
[0025]
Moreover, the main belt conveyor 30 connected to the wellhead 100 passes through the invert excavation part 70 as shown in FIG. At that time, the carrier roller of the main belt conveyor 30 is supported by a bracket 44 extending from the side wall of the tunnel 1 at least in this section, thereby enabling the excavator 71 to excavate the invert excavator 70. Yes.
[0026]
A belt storage device 80 is provided at the rear end of the main belt conveyor 30 (in the vicinity of the wellhead 100) for storing the surplus belt 32C and feeding the surplus belt 32C as the walking device 36 of FIG. 3 advances. . The belt 32 is reversed from the conveyance side to the return side with the driving pulley 90 as a tip. The belt storage device 80 is disposed on the return side.
[0027]
The belt storage device 80 secures a storage space 81 between the fixed frame 82 and the movable frame 83, and stores a margin belt 32C of about 100 to 200 m in the storage space 81. The margin belt 32C is accommodated in the storage space 81 by reciprocating several times using a large number of pulleys 84, and the return belt 32B is adjusted while adjusting the tension by moving the movable frame 83 with the tension winch 87. As paid out.
[0028]
The tension winch 87 is driven in accordance with the overhang of the forward / backward hydraulic jack 41 provided in the walking device 36 of the main belt conveyor 30. That is, the tension of the belt 32 is detected by a sensor (not shown), and the tension winch 87 is driven to the loose side in accordance with the detected value, so that the belt 32 is sequentially fed out. As a result, the main belt conveyor 30 is stretched.
[0029]
If the spare belt 32C of 100 to 200 m is stored, the extension of the main belt conveyor 30 can be handled for about two weeks by feeding out the belt 32. Therefore, when the surplus belt 32C is reduced, before the entire surplus belt 32C is fed out, a new spare belt is added in the middle so that it can be fed out as the tunnel progresses.
[0030]
Next, a series of actions will be described.
When transporting the slip generated at the face 2 due to blasting or the like, as shown in the figure, a slip loader 11 is disposed at the front end, a self-propelled crusher device 13 is disposed at the rear, and a self-propelled at the rear. A bridge conveyor 25 is provided. Then, the slip is put on the main belt conveyor 30 through the self-propelled crusher device 13 and the self-propelled bridge conveyor 25. Since the belt 32 continuously extends to the wellhead 100, the slip placed on the main belt conveyor 30 is conveyed to the wellhead 100 at once.
[0031]
When the transport device is advanced in accordance with the excavation, the self-propelled crusher device 13 and the self-propelled bridge conveyor 25 are advanced by self-propelled as they are. In addition, the main belt conveyor 30 is advanced in its front part by operating the walking boot 38, and the belt 32 is fed out by the belt storage device 80, thereby extending the entire length.
[0032]
Further, at the time of blasting, the slip loader 11, the self-propelled crusher device 13, and the self-propelled bridge conveyor 25 are moved backward to predetermined positions. As a result, not only the main belt conveyor 30 located away from the face 2 but also the loader 11, the self-propelled crusher device 13, and the self-propelled bridge conveyor 25 should not be affected by flying stones caused by blasting. Can do.
[0033]
In the main belt conveyor 30, in the passage portion of the slide center 50, the conveyance belt 32 </ b> A is passed through the cylindrical frame 58 provided in the slide center 50, and the return belt 32 </ b> B is held vertically, Since the space is secured, the slide centle 50 can be used without much difference from normal. Moreover, since the cylindrical frame 58 and the correction roller 47 are integrally attached to the slide centle 50, when the slide centle 50 moves forward or backward as the construction progresses, the cylindrical shape for avoiding obstacles. The frame 58 and the correction roller 47 can also be moved together.
[0034]
In the above embodiment, the gap conveying method and the belt conveyor according to the present invention are configured to be used for conveying tunnel excavation gaps, for example, but in addition to this, the loading position of the gap changes every moment, etc. In other cases, the same effect as described above can be obtained by applying the present invention. In that case, in the above-described embodiment, the shift conveying device is gradually advanced and extended, but conversely, the shift conveying device may be gradually retracted and contracted. Other than this, any other configuration may be adopted as long as it does not depart from the gist of the present invention.
[0035]
【The invention's effect】
As described above, according to the slip conveying method according to claim 1, the slip generated by blasting or the like is crushed by the slip pulverizing apparatus, and this is transferred to the belt conveyor via the self-propelled conveyor and moved backward. Since it is transported, work efficiency can be improved. Moreover, since the self-propelled conveyor is disposed between the shearing device and the belt conveyor, the distance between the belt conveyor and the face can be kept large, and the belt conveyor can be protected from the influence at the time of blasting. Further, by carrying out the gap conveyance with such a belt conveyor, the working environment in the tunnel can be improved as compared with the conveyance by the dump truck, and the conveyance efficiency can be improved by the continuous conveyance.
Furthermore, at the passage of the slide centle, the conveyor belt is inserted into the tube provided at the intermediate height of the leg of the slide centle, so there is a slide centle on the extension line of the belt conveyor. In addition, this can be avoided, thereby ensuring space.
[0036]
In addition, according to the belt conveyor according to claim 2, in the passage portion of the slide Sentoru, it is inserted into the tube body provided with a belt conveyor side to the middle height position of the leg portions of the slide Sentoru, further claims According to the belt conveyor according to No. 3, the belt on the return side is held vertically, so that even when there is a slide center on the extension line of the belt conveyor, this can be avoided, thereby ensuring space. it can.
[0037]
Further, according to the belt conveyor of the fourth aspect, since the slide centle moves forward or backward as the construction progresses , the pipe body and the guide member are integrally attached to the slide centle . Along with this, it is possible to automatically move the tube body and the guide member for avoiding the slide center .
[Brief description of the drawings]
FIG. 1 is a plan view showing a configuration of a front portion of a gap conveying device used in a gap conveying method according to the present invention.
FIG. 2 is a side view showing a configuration of a front portion of the apparatus.
FIG. 3 is a side view of a portion subsequent to FIG. 2;
4A is a side view showing a configuration of a slide-centre passage portion in the apparatus, and FIG. 4B is a cross-sectional view of the portion.
FIG. 5 is a side view showing a structure on the wellhead side in the apparatus.
[Explanation of symbols]
2 face (front)
11 Sliding loader (slipping loading means)
13 Self-propelled crusher device (slip crusher)
25 Self-propelled bridge conveyor (self-propelled conveyor)
30 Main belt conveyor (belt conveyor)
32A Conveyor belt (conveyor side belt)
32B Return belt (return belt)
47 Straightening roller (guide member)
50 slide centles (obstacles)
58 Tubular frame
100 wellhead (last part)

Claims (4)

In order to convey the slip backward, the slip is loaded into the slip crushing device at the back by the slip loading means arranged at the foremost part, and after crushing the slip by the slip crushing device, this is passed through the rear self-propelled conveyor It is transferred to a belt conveyor, and the belt conveyor is configured to convey the gap to the last part through a tubular body disposed at an intermediate height position of a leg portion of the slide center. Sliding transport method. A belt conveyor, the belt conveyor, in a portion that passes through the slide Sentoru, the tube body disposed intermediate the height of the leg portions of the slide Sentoru the belt conveying side does not interfere with the slide Sentoru A belt conveyor which is inserted. The belt conveyor according to claim 2, wherein a belt on a return side of the belt conveyor is guided by a guide member so as to be in a vertical state in a portion passing through the slide centle . 4. The belt conveyor according to claim 2, wherein when the slide centle moves forward or backward as the construction progresses, the pipe body, or the pipe body and the guide member are the slide centle. A belt conveyor that is integrally attached to the belt conveyor.

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