JPH1144182A - Moving frame and belt conveyor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a moving frame and a belt conveyor which are simple and inexpensive. SOLUTION: A walking device 36 which operates only in its longitudinal direction is provided at the front of a main belt conveyor 30 conveying muck. The walking device 36 comprises a walking boot 38 provided in such a way as to move freely along a walking frame 35, and an elevating hydraulic jack 40 and a forward-and backward-driving hydraulic jack 41, for driving the walking boot 38.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for transporting shears generated at a face when excavating a ground to construct a tunnel or the like, or piles of shears whose loading position changes every moment. The present invention relates to a movable gantry and a belt conveyor suitable for use.

[0002]

2. Description of the Related Art Generally, when excavating a tunnel or a mountain, debris generated when the rock face of a face is blasted, rock-cut, or split rock is carried out by a dump truck or the like. However, the exhaust gas, dust, noise, etc. generated from the dump truck may deteriorate the surrounding environment and work environment, and especially during tunnel excavation, the transfer work must be interrupted when the dump truck is replaced. Therefore, there is also a problem that the transport work efficiency is poor.

For this reason, in recent years, the use of an electric belt conveyor has been considered. However, in order to use the belt conveyor, the slip can be transported on the belt conveyor because the slip is mounted on the belt conveyor and transported. Need to be crushed. As a technique for crushing the debris and transporting the debris by a belt conveyor, there is a debris crushing apparatus as disclosed in Japanese Patent Application Laid-Open No. 8-177386. In this technique, not only is the crushed sheet conveyed, but also a configuration in which a crawler is provided at the front end of the rear belt conveyor. This allows the front end of the belt conveyor to move forward and backward when the mounting position of the slip changes with the progress of excavation.

[0004]

However, the above-described technique has the following problems.
That is, in the above technology, a crawler is employed to move the belt conveyor forward and backward. It is well known that a crawler is frequently used as a self-propelled mechanism of various devices in the field of civil engineering and construction, not limited to this technology. However,
In particular, the movement of the belt conveyor such as forward and backward movement in the tunnel is only in the front-rear direction, and it can be said that the use of a crawler movable in all directions for such movement has excessive functions. There was room for improvement in this regard. Of course, it is not limited to the above belt conveyor,
The same applies to other devices as long as the moving direction is on a straight line. The present invention has been made in consideration of the above points, and has as its object to provide a simpler and lower-cost moving stand and belt conveyor.

[0005]

The invention according to claim 1 is
A moving base capable of moving forward and backward, the moving base being provided with a walking device, wherein the walking device is provided with a frame extending in a substantially horizontal direction, and movably provided along the frame. It is characterized by comprising a leg, a lifting jack for raising and lowering the frame, and a front-rear drive mechanism for moving the leg back and forth along the frame.

According to a second aspect of the present invention, there is provided a belt conveyor, comprising a frame extending substantially horizontally at a front portion thereof, and a leg movably provided along the frame.
A walking device including a lifting jack for raising and lowering the leg portion, and a front-rear drive mechanism for moving the leg portion back and forth along the frame is provided, and a rear portion of the extra length of the belt of the belt conveyor is provided. , And a belt storage device is provided to draw out and extend the belt as needed.

[0007]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an embodiment of a movable gantry and a belt conveyor according to the present invention; FIG. Here, a case where the movable gantry and the belt conveyor according to the present invention are used for transporting, for example, excavation waste in a tunnel will be described. FIG. 1 is a plan view showing the configuration of a front portion of a transport device used in the shear transport 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. Fig. 4 is a side view showing a configuration of a slide center passing portion in the device, Fig. 4 (b) is a transverse sectional view of the portion, and Fig. 5 is a side view showing a configuration of a wellhead side in the device.

[0008] This slip transport device is for transporting the foremost slip generated at the cutting face (foremost part) 2 of the tunnel 1 shown in FIG. 1 backward, and is loaded on the cutting face 2 of the tunnel 1. Machine (slipping loading means) 11, a self-propelled crusher device (slipping crusher) 13 provided subsequent to the shear loading device 11, and a self-propelled crusher device 13
From the position of the self-propelled bridge conveyor (self-propelled conveyor) 25 and the self-propelled bridge conveyor 25 shown in FIG. 2 as shown in FIG. And a main belt conveyor (moving gantry, belt conveyor) 30 integrally extended to 100. A small auxiliary loader 12 is also provided near the forefront face 2.

As shown in FIGS. 1 and 2, the shear loader 1
1 has a chain conveyor 11a for loading on a traveling vehicle 11b, and transports the slip generated by the face 2 to a high place at the rear, and drops it onto a self-propelled crusher device 13.

The self-propelled crusher device 13 has a traveling mechanism 20 of a crawler type and a fixed jack 21, and can be self-propelled to an arbitrary position and fixed. The traveling mechanism 20 can be driven by both an engine and a motor.

The self-propelled crusher device 13 has a vibrating grizzly feeder 14 at a front portion thereof, and receives a slip falling from the slip loader 11 here. Smaller of the scraps fed to the vibrating grizzly feeder 14 are sifted as they are and ride on the belt conveyor 15 arranged below. The larger one is from the vibrating grizzly feeder 14 to the apron feeder 1 installed at the rear.
6 and is sent to the horizontal jaw crusher 17 where it is crushed into small pieces. This horizontal jaw crusher 1
Reference numeral 7 denotes a pair of two jaws 17a, 1 having a vertical rotation shaft (not shown) and operating in the horizontal direction to sandwich the slip.
7a. And the crushed waste,
On the belt conveyor 15 arranged below, together with the small slip, the vehicle moves to the front end of the self-propelled bridge conveyor 25 at the rear end of the self-propelled crusher device 13.

Although a normal jaw crusher has vertical jaws, the height of the machine is high and the machine cannot be placed in a narrow space such as in a tunnel. However, this horizontal jaw crusher 17 has two pairs of jaws 17a, Since 17a is placed horizontally and its height is reduced (about 2 m), it can be inserted even in a tunnel. Then, the material is forcibly supplied by the apron feeder 16 because of the horizontal arrangement.

Crushing (crushing) all of the generated waste is tedious and time consuming. However, in this self-propelled crusher device 13, the size of the waste is sorted by a vibrating grizzly feeder 14 before the crushing. And
Only crushes larger than a predetermined size are crushed.
Since it is dropped on the lower belt conveyor 15 as it is, the crushing time is shortened and the efficiency is high.

The driving of the vibrating grizzly feeder 15, the horizontal crusher 17, the belt conveyor 16, and the apron feeder 16 is always performed, so that they are electrically driven.

As shown in FIGS. 1 and 2, the self-propelled bridge conveyor 25 can be retracted backward by about 30 to 50 m at the time of blasting, and can return to its original position at the time of carrying work. It is mounted on a 26 turntable 28. Then, by turning the swivel 28, the swivel 28 can swing in the horizontal direction. Further, the height can be adjusted by a height adjusting jack 29.

The self-propelled bridge conveyor 25 is provided from the self-propelled crusher device 13 to the main belt conveyor 30.
It is intended to transfer the waste well, the rear end is
It rests on a walking frame (frame) 35 provided at the front end of the main belt conveyor 30. The rear-end support portion has a wheel-supported support base 27 capable of traveling in the front-rear direction on a traveling rail 31 provided on a walking frame 35.
Is provided. The traveling rail 31 is laid in a predetermined range from the front end of the main belt conveyor 30 so that when the self-propelled bridge conveyor 25 retreats, the rear end can be reliably supported. In FIG. 3, a range indicated by reference numeral L is a range in which the support base 27 moves at the time of blasting, and a stopper 34 is provided at a position further rearward than the range.

The main belt conveyor 30 has one belt 3
2 is continuous to the bottom of the mine, so that the waste can be transported to the mine at a stretch. Main belt conveyor 30
Is provided with a walking device 36 as an advance mechanism for advancing the position of the front portion. The walking device 36 includes a walking frame 35, walking boots (legs) 38, a hydraulic jack for raising and lowering (jack for raising and lowering) 40, and a hydraulic jack for moving forward and rearward (fore and aft driving mechanism) 41.

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 motion error absorbing frame 35C. The walking frame 35 includes a front walking device 36A and a rear walking device 3.
6B, it is divided into a front walking frame 35A and a rear walking frame 35B. The vertical motion error absorbing frame 35C includes a front walking frame 35A and a rear walking frame 35B.
The vertical movement error is absorbed.

Two walking boots 38 are supported by the walking frames 35A and 35B via the 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 hydraulic jack 41 for moving forward and backward moves these walking boots 38 in the front-rear direction. The hydraulic jack 40 for moving up and down moves each walking frame 35A,
It is deployed around 35B.

When the walking device 36 is advanced,
First, the walking frames 35A, 35B are lifted by the lifting hydraulic jack 40, and the walking boots 38 are lifted off the floor. Next, in this state, the walking boot 38 in the floating state is moved forward by driving the hydraulic jack 41 for forward and backward movement. After being moved to the front side, the walking frames 35A and 35B are lowered by the hydraulic jack 40 for lifting and lowering, and the walking boot 3
8. Land on the floor. Next, the walking frames 35A and 35B are moved forward by the reaction force by driving the hydraulic jack 41 for forward and backward movement in the opposite direction. that time,
The walking boot 38 sticks to the floor. In the case of moving forward more than one stroke, the robot is advanced by a necessary amount by repeating the above operation.

The main belt conveyor 30 connected to the wellhead is
On the way, as shown in FIGS. 4A and 4B, the vehicle passes through a slide center 50 provided in the tunnel 1. In this passing portion, the conveyor belt 32A of the main belt conveyor 30 is pierced through a cylindrical frame 58 provided in the middle of the leg 50a of the slide center 50, and a carrier roller disposed in the cylindrical frame 58 is provided. 59 supported.

Also, in this section, it is difficult to provide a horizontal space for the width of the belt in the center 50, so that the return belt 32B is held not vertically but vertically to secure the space. In this case, the section S1 in which the return belt 32B shifts from horizontal to vertical,
In addition, since a section S2 that transitions from vertical to horizontal is required, the direction of the belt 32B is changed by the correction roller 47 in that section. In this manner, the use of the slide center 50 is not much different from the usual case.

The main belt conveyor 30 connected to the wellhead 100 passes through an invert excavation section 70 as shown in FIG. At this time, at least in this section, the carrier roller of the main belt conveyor 30 is supported by the bracket 44 extending from the side wall of the tunnel 1, whereby the inverting excavator 7 by the excavator 71
0 excavation work is possible.

The rear end of the main belt conveyor 30 (the wellhead 10
0), the spare belt 32C is stored and the spare belt 32C is moved in accordance with the advance of the walking device 36 in FIG.
Is provided. The belt 32 reverses from the transport side to the return side with the drive pulley 90 at the tip. The belt storage device 80 is provided on the return side.

In the belt storage device 80, a storage space 81 is secured between the fixed frame 82 and the movable frame 83, and a reserve belt 32C of about 100 to 200 m is stored in the storage space 81. The extra belt 32C is
It is stored in the storage space 81 by being reciprocated multiple times using a large number of pulleys 84, and is moved out as the return belt 32B while adjusting the tension by moving the movable frame 83 with the tension winch 87.

The tension winch 87 is driven in accordance with the overhang of the forward / reverse hydraulic jack 41 provided on 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, and the belt 32 is sequentially fed out. Thereby, the main belt conveyor 30 is stretched.

If the spare belt 32C of 100 to 200 m is stored, the main belt conveyor 30 can be stretched for about two weeks by feeding the belt 32. Therefore, when the spare belt 32C is reduced, a new spare belt is added in the middle before the spare belt 32C is completely extended, so that the spare belt 32C can be newly extended according to the progress of the tunnel.

Next, a series of operations will be described. When transporting the shears generated by the blasting face 2 due to blasting or the like, as shown in the figure, a shear loader 11 is provided at the front end, a self-propelled crusher device 13 is provided behind the loader 11, and a self-propelled crusher 13 is further provided behind. A bridge conveyor 25 is provided. Then, the waste is put on the main belt conveyor 30 via the self-propelled crusher device 13 and the self-propelled bridge conveyor 25. Since the belt 32 continuously extends to the wellhead 100, the shears placed on the main belt conveyor 30 are carried to the wellhead 100 at a stretch.

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 moved forward by self-propelled. In addition, the main belt conveyor 30 is moved forward by the operation of the walking boot 38 and the belt 32 is fed out by the belt storage device 80 to extend the entire length.

At the time of blasting, the shear loader 11, the self-propelled crusher device 13, the self-propelled bridge conveyor 2
5 is retracted to a predetermined position. As a result, the main belt conveyor 30 at a position away from the face 2 is, of course,
The shear loading machine 11, the self-propelled crusher device 13, and the self-propelled bridge conveyor 25 can also be prevented from being affected by flying stones caused by blasting.

Then, in the main belt conveyor 30,
The front portion is advanced by a walking device 36 that operates only in the front-rear direction. The walking device 36 includes a walking boot 38 movably provided along a walking frame 35 and a driving boot 38 for driving the walking boot 38. Since it is composed of the lifting hydraulic jack 40 and the forward / backward moving hydraulic jack 41, the structure is very simple, and it is manufactured by combining parts such as jacks which are frequently used in the civil engineering and construction fields. Is possible, so that the cost can be reduced.

In the above-described embodiment, the movable gantry and the belt conveyor according to the present invention are used, for example, for transporting excavation debris in a tunnel. In addition, the loading position of the debris changes every moment. By applying the present invention to other cases, for example, the same effects as described above can be obtained. In this case, in the above-described embodiment, the shear transfer device is configured to be gradually advanced and extended.
Conversely, it is also possible to adopt a configuration in which it is gradually retracted and contracted. In the above-described embodiment, the walking device 36 is used as the moving mechanism of the main belt conveyor 30. However, the moving gantry according to the present invention may be any other than the main belt conveyor 30 as long as it moves along a straight line. It is also possible to apply the present invention to other devices and the like in the same manner, thereby making it simpler and lower in cost as compared with the case where a crawler or the like is used as described above. Other than this, any other configuration may be adopted without departing from the gist of the present invention.

[0033]

As described above, according to the movable gantry according to the first aspect and the belt conveyor according to the second aspect, the walking device can be used to advance and move along a straight line.
A retreat operation can be performed. The structure for realizing this is very simple, and can be manufactured by combining widely used components such as hydraulic jacks, so that the cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a plan view showing a configuration of a front portion of a shear transfer device which is configured by partially using a movable gantry and a belt conveyor according to the present invention.

FIG. 2 is a side view showing a configuration of a front part of the apparatus.

FIG. 3 is a side view of a portion subsequent to FIG. 2;

FIG. 4A is a side view showing a configuration of a slide center passing portion in the apparatus, and FIG. 4B is a cross-sectional view of the same.

FIG. 5 is a side view showing a configuration of a wellhead side in the same device.

[Explanation of symbols]

 Reference Signs List 30 Main belt conveyor (moving frame, belt conveyor) 32 Belt 35 Walking frame (frame) 36 Walking device 38 Walking boot (leg) 40 Hydraulic jack for lifting (jack for lifting) 41 Hydraulic jack for forward / backward movement (drive mechanism for front / rear) ) 80 belt storage device

Claims (2)

[Claims] 1. A moving platform capable of moving forward and backward, the traveling platform being provided with a walking device, wherein the walking device moves along a frame extending in a substantially horizontal direction. Legs provided freely,
A movable gantry comprising: a lifting jack for raising and lowering the frame; and a front-rear drive mechanism for moving the leg portion back and forth along the frame. 2. A belt conveyor having a front portion,
A frame extending in a substantially horizontal direction, a leg movably provided along the frame, a lifting jack for raising and lowering the leg, and a front and rear for moving the leg back and forth along the frame. A walking device provided with a drive mechanism is provided, and a belt storage device is provided at a rear portion for storing an excess length of the belt of the belt conveyor, and extending and extending the belt as necessary. A belt conveyor characterized by the following.