JP3073170B2 - Belt conveyor and transport method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a belt conveyor for conveying an object to be conveyed and a conveying method.

[0002]

2. Description of the Related Art Generally, in excavation work of a tunnel using a shield machine, removal of excavated earth and sand is carried out, for example, by:
It is performed as follows. That is, the removal of the excavated earth and sand in the tunnel excavation work, first, the earth and sand accumulated in the chamber provided behind the cutter disk of the earth pressure shield machine is carried out behind the shield machine with a screw conveyor, and the screw conveyor Sediment discharged from the discharge port is received on a belt conveyor.

[0003] Then, the earth and sand is loaded on a trolley for transporting the earth and sand by a belt conveyor, and the earth and sand transports the earth and sand to a wellhead. Conventionally, as the above-mentioned belt conveyor, a flat conveyor in which an endless belt of the belt conveyor moves around in a substantially flat state, or a U-type belt in which the endless belt moves around in a state where the cross section of the endless belt is regulated to be U-shaped. Conveyor. In the U-shaped conveyor, one endless belt can be arranged to be curved left and right, and the conveyed object can be bent by bending the endless belt along the curved conveyance path. .

[0004]

A plurality of succeeding bogies for supplying electric power, hydraulic pressure, etc. to the shield machine are arranged behind the shield machine, and the tunnel to be excavated has a small diameter and curved. In some cases, the trailing trolley and the slip trolley cannot be arranged side by side at the curved portion in the tunnel. Then, when the trailing bogie of the shield machine is placed in the curved part of the small-diameter tunnel,
The belt conveyor conveys the earth and sand to the rear of the succeeding bogie, and at the rear of the subsequent bogie, load the earth and sand from the belt conveyor to the slip trolley, or extend the hydraulic hose and electric cable connecting the subsequent bogie and the shield machine. A method is conceivable in which the trailing bogie is arranged on a straight portion of the tunnel behind the curved portion of the tunnel, and earth and sand is loaded from the belt conveyor onto the slip trolley in front of the trailing bogie.

[0005] In order to convey the earth and sand behind the carriage following the curved portion of the tunnel by the belt conveyor, it is necessary that the belt conveyor be able to bend along the curved tunnel. It is necessary to use a conveyor. However, in the U-shaped belt conveyor, since the endless belt has a U-shape, the vertical width of the U-shaped belt conveyor is larger than that of the flat belt conveyor. Further, in the U-shaped belt conveyor, the frame that supports the endless belt along the transport path has a plurality of carrier rollers that support and guide the endless belt in a state where the endless belt is regulated in a U shape. The cross-sectional area occupied by the U-shaped belt conveyor is inevitably large.

Accordingly, the U-shaped belt conveyor is disposed so as to extend rearward beyond the succeeding bogie, and the U-shaped belt conveyor is disposed on the shearing trolley behind the subsequent bogie, thereby providing a belt conveyor. If the configuration is such that earth and sand are carried into the sneaking trolley, the U-shaped belt conveyor having a large cross-sectional area and the trailing trolley or the sledding trolley must be arranged in the tunnel so that the tunnel has a small diameter. In this case, it is almost impossible to arrange a U-shaped belt conveyor.

On the other hand, when the trailing bogie is located away from the shield machine and behind the curved portion of the tunnel as described above, the belt conveyor may be a linear flat type. Is curved, when the belt conveyor is linear, only a short belt conveyor may be used. In this case, there may be a case where only one slip truck can be placed under the short belt conveyor, and a plurality of slip trucks are placed under the belt conveyor, and the earth and sand from the belt conveyor is sequentially placed on a plurality of slip trucks. It is not possible to carry in, and if the earth and sand is carried into one slip truck, the slip truck repeatedly goes back and forth from the vicinity of the shield machine to the wellhead.

[0008] In this case, the amount of excavated earth and sand corresponding to the length of one ring of the segment is less than that of one slip truck, and
Excavation for one ring of the segment is completed by the shield machine, and if the shearing truck can reciprocate between the vicinity of the shield machine and the wellhead while assembling the segment for one ring, while the shield machine is excavating The sediment discharged from the shield machine is piled on the slip truck by the belt conveyor, and while the excavation of the shield excavator is suspended by the assembly of the segments, the soil is transported to the wellhead by the shear truck, and the excavation of the shield excavator is performed. Before starting, there is no particular problem because the slipcart can be returned to the vicinity of the shield machine.

However, if the amount of excavated earth and sand corresponding to the length of one ring of the segment is larger than the amount of one slip truck, the stage in which the earth and sand is fully loaded on the shear truck before the excavation of the length of one ring of the segment is completed. In this case, the earth and sand must be transported to the wellhead by the shearing mine, and excavation by the shield machine must be interrupted until the shearing mine returns again, which may increase the construction period.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a belt conveyor having a small cross-sectional area which can be sufficiently used even in a small-diameter tunnel, and a conveying method.

A belt conveyor according to a first aspect of the present invention includes a rotating body disposed at each of the front and rear ends, a winding part wound around the rotating body, and a feed side part and a return side part between these rotating bodies. Endless belts are arranged vertically and move around, and a plurality of endless belts are arranged at intervals between the rotating bodies at the front and rear ends, and the endless belts are supported and guided between the rotating bodies from below. A guide member, and a frame portion for supporting the guide member, wherein the guide member supports and guides an upper feed side portion of the endless belt, and is provided for the circumferential movement of the endless belt. A first guide member made of a fixed substantially U-shaped fixing member and a lower return side portion of the endless belt are supported and guided, and a plurality of arranged carrier rollers are generally U-shaped. Form of The second guide member has a vertical position overlapping the frame portion, the first guide member has a smaller cross-sectional area than the second guide member, the upper and lower thickness The upper and lower portions of the endless belt are restricted by the guide member so that the upper and lower portions of the endless belt are substantially U-shaped in cross section with their left and right side edges being higher than the center portion. And, the left and right side edges of the lower portion of the endless belt are higher than the center of the upper portion of the endless belt, and a part of the left and right sides of the lower portion of the endless belt, The solution to the above-mentioned problem is that a part of the left and right side portions of the upper portion is in a state of being arranged side by side.

According to the above configuration, at least a part of the guide members that support and guide the endless belt from below is a fixed member that is fixed against the circumferential movement of the endless belt. The guide member formed of the fixed member can have a smaller volume than a guide member having a movable portion movable with respect to the circumferential movement of the endless belt. That is, if the guide member is not a member that rotates with respect to the circumferential movement of the endless belt like a carrier roller, and is made of a fixed member, for example, a plate or a bar, the guide member may be a carrier. Since the cross-sectional area can be reduced as compared with a movable member such as a roller, the ratio of the guide member to the cross-sectional area of the belt conveyor is reduced, and thereby the cross-sectional area of the belt conveyor is reduced. Can be.

If the guide members of the belt conveyor are all fixed members as described above, the sectional area of the belt conveyor can be reduced over the entire space between the rotating members, and a part of the belt conveyor can be reduced. If the guide member is a fixing member as described above, a part of the belt conveyor can have a smaller sectional area than other parts. If the cross-sectional area is small in a part or the whole of the belt conveyor, the belt conveyor can be used in a narrow place, and workability in a narrow place can be improved.

Further, if the number of movable members such as carrier rollers is reduced by using the guide member of the belt conveyor as a fixed member, the cost of the movable member is reduced, and the structure of the belt conveyor is simplified to facilitate manufacture. The manufacturing cost of the belt conveyor can be greatly reduced. Further, if the number of movable members such as carrier rollers can be reduced in the belt conveyor, maintenance required for the movable members can be saved. The rotating members are rollers disposed at both ends of a general belt conveyor, and at least one of these rotating members is connected to driving means such as an electric motor to be driven to rotate. The endless belt is driven to rotate by the rotation driven roller. The endless belt is an annular belt for a well-known belt conveyor.

Further, at least a part of the guide members is a fixed member as described above, and is, for example, a rod-shaped member or a plate-shaped member having no roller. However, since the guide member slides on the guide member when supporting the endless belt from below, the guide member is smooth so as not to generate large friction with the endless belt, and has a low friction coefficient. It is preferable that the endless belt is formed of a member, and that the contact surface with the endless belt be small as long as the endless belt can be supported. The cross-sectional shape of the guide member formed of the fixing member is not particularly limited, and various shapes such as a circle, an ellipse, a polygon, and a rectangle can be used. It may be a flat surface or a curved surface, and may be a member made of a member having a low friction coefficient and having a convex portion or the like having a small contact surface.

The belt conveyor is a so-called U-shaped belt conveyor.
Becomes a belt conveyor, and supports bays corresponding to curved transport paths.
When it becomes possible to bend a conveyed object by bending and arranging it
Both are conventional U-shaped belt con
For the conveyor, above the U-shaped belt conveyor as described above
It is possible to narrow the lower width, and conventionally a small diameter tunnel
U-shaped belt conveyor that was difficult to use in narrow places such as inside
Can be used in narrow places, and the U-type belt conveyor
The range of use can be greatly expanded.

Also, there is no space between the rotating bodies.
Move both the upper and lower parts of the end belt
Have a substantially U-shaped cross-section with side edges above the center
To make the upper part of the endless belt U-shaped,
U-shaped bell rather than an inverted U-shaped lower part
The vertical width of the conveyor can be reduced,
The guide member is fixed and the top and bottom thickness of the guide member is reduced.
The vertical width of the U-shaped belt conveyor
Can be narrower in width.

The guide member composed of the fixing member has a shape that surrounds the outer surface (lower surface) of the endless belt having a substantially U-shaped cross section from the lower side in order to make the cross-sectional shape of the endless belt substantially U-shaped. Is preferred. In addition, the guide member having a movable portion such as a carrier roller includes, for example, a plurality of movable portions such as a carrier roller arranged along a circumferential direction on a lower surface of an endless belt having a substantially U-shaped cross section, and a substantially U-shaped shape as a whole. It has a shape. In addition, the substantially U-shaped shape here is basically a shape in which both left and right end portions (side edge portions) are curved above the center portion, and both end portions (side edge portions) like U are not necessarily required. It does not have to be substantially vertical.

In the case where the guide member for supporting the upper portion of the endless belt which is vertically overlapped between the rotating members is the fixed member as described above, the guide member for supporting the upper portion of the endless belt is provided. Is disposed below the upper portion of the endless belt, that is, between the upper portion and the lower portion of the endless belt, so that the guide member has a small volume, that is, a thinner upper and lower thickness. By doing so, the gap between the upper part and the lower part of the endless belt can be narrowed,
The vertical width of the entire belt conveyor can be reduced.

If the guide member supporting the lower portion of the endless belt is also made of the above-mentioned fixing member, the vertical width of the belt conveyor can be further reduced. There is a possibility that the vertical position of the guide member that supports the portion of the guide member may overlap the frame portion of the belt conveyor that supports the guide member of the above-described belt conveyor, and the upper and lower thickness of the lower guide member may be thin. Unless the vertical width of the above-mentioned frame portion is reduced, the vertical width of the belt conveyor may not be significantly reduced.

Accordingly, the lower guide member for supporting the lower portion of the endless belt may be a fixed member like the upper guide member, or may have a movable member such as a carrier roller. However, in order to minimize the cross-sectional area of the belt conveyor, it is preferable that the lower guide member is also a fixed member, and the frame is also downsized.

According to a second aspect of the present invention, there is provided the belt conveyor, wherein the guide member comprising the fixing member is a bar-shaped or long member arranged below the endless belt in a direction perpendicular to the length direction of the endless belt. A thin plate-shaped fixing member is a means for solving the above problem. According to the above configuration,
By making the guide member a stick-shaped or long thin plate-shaped fixed member, the upper and lower thicknesses of the guide member can be made significantly thinner than when the guide member has a movable member such as a carrier roller. The same operation and effect as those of the first or second aspect can be obtained.

A rod-shaped or long thin plate-shaped fixing portion
Examples of the material include a thin tubular steel material and a round bar-shaped steel material.
And the use of thin plate-shaped steel (flat bar)
Member having sufficient strength to support an endless belt
Then, a member made of a material other than steel may be used.
For example, various metals including iron and metals other than hard synthetic resin and iron
An alloy or the like can be used as a material for the guide member.

According to a third aspect of the present invention, there is provided a belt conveyor according to the first aspect of the present invention, wherein the side edges of the endless belt are regulated so as to have a substantially U-shaped cross section with the left and right side edges being higher than the center. In addition, the present invention provides a means for solving the above-mentioned problem, in which an anti-vibration restricting member is disposed on the back side and restricts the fluctuation of the side edge of the endless belt. According to the above configuration,
The cross-section of the endless belt is substantially U-shaped and the belt conveyor is U-shaped.
When the conveying path is curved left and right, the left and right side edges of the endless belt may swing in the vicinity of the curved portion, resulting in a wavy side edge of the endless belt. However, due to the steady rest regulating member arranged on the front side or the front side and the back side of the side edge of the endless belt,
The deflection of the side edge of the endless belt can be restricted, and the side edge of the endless belt can be prevented from being wavy.

The above-mentioned restricting member is a right-and-left swing when the side edge of the endless belt is substantially vertical, for example, the side edge of the endless belt. If the portion is oblique, the oblique swing will occur.
Therefore, the front side and the back side of the side edge of the endless belt (the upper side and the lower side when the endless belt is flat, and the left and right sides when the side edge of the endless belt is vertically set) By arranging the regulating member so that the side edge of the endless belt does not swing beyond the regulating member, it is possible to prevent the side edge of the endless belt from waving as described above. Since the back side of the endless belt is regulated by the guide member,
The regulating member may be provided only on the surface side of the endless belt.

Preferably, the restricting member is not in contact with the endless belt so that friction does not occur when the endless belt is not swinging. It is preferable that they are arranged at a right angle. In addition, the regulating member is only required to prevent the side edge portion of the endless belt from swinging beyond the regulating member as described above, and the shape and material thereof are not limited.
As in the case of the guide member, it is preferable that a large friction does not occur in a state of contact with the endless belt.

The regulating member may be a rotating member that rotates in response to the movement of the endless belt when it comes into contact with the endless belt, similarly to the guide member having a movable portion. Furthermore, two structures that protrude or extend outward along the circumferential direction of the rotating member so that both the front side and the back side of the side edge of the endless belt can be regulated by one rotating member. Or by providing a groove along the circumferential direction of the rotating member, so that the side edge of the endless belt is disposed between the two structures or in the groove, the structure or the groove of the structure The left and right inner side surfaces serve as regulating members, and the endless belt can be prevented from swinging with a single rotating member.

According to a fourth aspect of the present invention, there is provided a transport method using the belt conveyor according to any one of the first to third aspects, wherein the transported object is transported by the belt conveyor. Is a means for solving the above problem. According to the above configuration, similarly to the belt conveyor according to any one of the first to third aspects, it is possible to narrow the vertical width of the belt conveyor and improve workability in a narrow place.

[0029]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A belt conveyor according to an embodiment of the present invention will be described below with reference to the drawings. FIGS. 1 to 4 show a belt conveyor of this example. As shown in FIGS. 1 and 2, the belt conveyor includes rollers (rotating bodies, shown in FIG. 3) 1 and 2 disposed at both front and rear ends, and is wound around these rollers 1 and 2. Feed portion 3a and return portion 3 between rollers 1 and 2
b, an endless belt 3 arranged vertically and moving around
A plurality of first and second guide members 4, 5 arranged at intervals between the rotating bodies at the front and rear ends, and a frame portion 6 supporting these first and second guide members 4, 5; It is provided with.

The rollers 1 and 2 are, as shown in FIG.
It is a well-known U-shaped belt conveyor which is disposed at both front and rear ends of the belt conveyor. In the rollers 1 and 2, the endless belt 3 is not in a U-shaped cross section but in a flat state. The roller 2 is connected to a motor 2a via a chain, and is driven to rotate by the motor 2a. The roller 2 causes the endless belt 3 to move around.

As shown in FIGS. 1 and 2, the endless belt 3 is configured to move around in a state in which a feed portion 3a is disposed on an upper side and a return portion 3b is disposed on a lower side. The moving direction of the feed portion 3a and the moving direction of the return portion 3b are opposite. Further, the feed portion 3a is regulated by the first guide member 4 and held in a substantially U-shaped cross section, and the return portion 3b is regulated by the second guide member 5 and held in a substantially U-shaped cross section. I have. The return portion 3b is curved more loosely than the feed portion 3a.
It has a shape closer to an arc rather than a letter. The substantially U-shaped cross section indicates a state in which the left and right side edges of the endless belt 3 are curved so as to be higher than the central portion, and includes an arc shape.

The first guide member 4 is made of a round bar-shaped steel material, and is formed by bending a round bar-shaped steel material into a substantially U-shape. A large number of the first guide members 4 are arranged between the two rollers 1 and 2 at substantially equal intervals, and support the upper feed portion 3a of the endless belt 3 from below. The feed portion 3a is guided in the transport direction, and the feed portion 3a is surrounded by a U
It is regulated so as to form a letter.

The first guide member 4 is fixed without any movable parts such as carrier rollers.
The feed portion 3 a of the endless belt 3 slides on the first guide member 4. Therefore, the first guide member 4
Have a smaller cross-sectional area than the second guide member 4 having carrier rollers 5a to be described later, and have a smaller vertical thickness.

The first guide member 4 is provided with an endless belt 3.
And the return portion 3
b. That is, the first guide member 4
Are disposed between a feed portion 3a and a return portion 3b which are disposed above and below the endless belt 3, and the first guide member 4
The cross section between the feed portion 3a and the return portion 3b of the endless belt 3 can be narrowed by reducing the cross-sectional area of the endless belt 3 and reducing the vertical thickness (left and right thicknesses at the left and right ends).

Further, regulating members 4a are provided at both left and right ends of the first guide member 4. The regulating member 4a
Is to prevent the left and right side edges of the feed portion 3a of the endless belt 3 from moving above the regulating member 4a,
This prevents one of the left and right side edges of the feed portion 3a of the endless belt 3 from moving upward and the other side edge from moving downward. The regulating member 4a
Is formed in a spinning wheel shape from a roller 4b and disks 4c, 4c provided at left and right ends of the roller 4b.
The roller 4b and the disks 4c, 4c rotate integrally. Such a regulating member 4a is used for the endless belt 3.
When the side edge of the feed portion 3a moves upward, the side edge enters between the two disks 4c and 4c of the regulating member 4a and comes into contact with the roller 4b, whereby the side edge is moved. The part is prevented from moving above the regulating member 4a. The two disks 4c, 4c, in particular, the inner disk 4c prevent the side edges of the endless belt 3 from bending inward. Further, when the side edge of the endless belt 3 comes into contact with the regulating member 4a, the regulating member 4a rotates in accordance with the movement of the endless belt 3, thereby reducing the friction between the regulating member 4a and the endless belt 3. Is to be reduced.

In FIG. 1, the first guide member 4
Although the regulating member 4a is illustrated only at the left end of the first guide member 4, in practice, as shown in FIG. 2, the regulating member 4a is also provided at the right end of the first guide member 4. Further, in FIG. 1, a regulating member 4d which can be used in place of the regulating member 4a is shown at the right end of the first guide member 4.
The restricting member 4d has an area larger than the cross-sectional area of the first guide member 4, and has a rectangular curved plate 4e disposed substantially orthogonal to the end of the first guide member. And a pressing plate 4f extending downward from the distal end of the curved plate 4e. When the side edge of the endless belt 3 moves upward, the rectangular curved plate 4e comes into contact with the side edge to prevent the side edge from moving above the regulating member 4d. is there. When the side edge of the endless belt 3 abuts on the lower surface of the rectangular curved plate 4e, the rectangular curved plate 4e is formed in a substantially arc shape so that the contact surface with the endless belt 3 does not become large. So that the friction between them does not increase. The holding plate 4f is
The side edge of the endless belt 3 moves upward and the rectangular curved plate 4e
When the contact is made, the side edges are prevented from being bent inward. Although the above-described regulating members 4a and 4d are configured to prevent the inner edge of the endless belt 3 from bending inward, the tension and the like of the endless belt 3 are adjusted to adjust the tension of the endless belt 3. Can be prevented to some extent from the inside of the side edge portion, so that, for example, the restricting member may be composed of only the rectangular curved plate 4e obtained by removing the pressing plate 4f from the restricting member 4d.

The first guide member 4 has both left and right ends supported by support arms 7, 7 of the frame 6, which will be described later. 7 is fixed to the frame 6. In FIG. 1, only the right support arm 7 is shown and the left support arm 7 is omitted to prevent the drawing from being complicated. The second guide member 5 is formed by connecting five carrier rollers 5a in a line. The second guide member 5 is configured such that carrier rollers 5a... Connected in a row are curved in a substantially U-shape (arc shape).

A large number of the second guide members 5 are arranged between the two rollers 1 and 2 at substantially equal intervals, and the lower return portion 3b of the endless belt 3 is moved from below. While supporting and guiding in the transport direction, the lower surface side of the return portion 3b is surrounded by a U-shape so that the return portion 3b has a substantially U-shaped section.
It is regulated so as to have a character shape (arc shape). Soshi
As shown in FIG. 1, the return portion of the endless belt 3
Part of the left and right sides of the minute 3b and the feed part 3 of the endless belt 3
a part of the left and right sides of a
You. Further, the carrier rods at the left and right ends of the second guide member 5 are provided.
Rollers 5a, 5a have larger carrier rollers 5a.
Having a radius and arranged coaxially with the carrier rollers 5a.
Donut plate-shaped regulating members 5b, 5b are provided.
You.

As in the case of the regulating member 4a of the first guide member 4, the left and right side edges of the return portion 3b of the endless belt 3 move above the regulating members 5b and 5b. This prevents one of the left and right side edges of the return portion 3b from moving upward and the other side edge from moving downward. The regulating members 5b and 5b of the second guide member 5 rotate integrally with the carrier roller 5a provided with the regulating members 5b and 5b. However, large friction does not occur even if they come into contact with each other.

The second guide member 5 is in a state where both left and right ends are supported by support arms 8, which will be described later, of the frame portion 6, and the second guide member 5 is supported by the support arms 8 in the frame portion. 6 is fixed. In FIG. 1, only the left support arm 8 is shown and the right support arm 8 is omitted to prevent the drawing from being complicated.

Although the second guide member 5 is thicker than the first guide member 4 as described above, the upper and lower positions of the second guide member 5 Since the upper and lower portions of the second guide member 5 are partly included in the upper and lower widths of the frame portion 6 even if the upper and lower thicknesses of the second guide member 5 are slightly increased, the belt The vertical width of the entire conveyor is not increased by the thickness of the second guide member 5 which is increased in the vertical direction.

As shown in FIG. 3, the frame section 6
A plurality of divisions 9 are connected to each other so as to be rotatable left and right, and before and after each division 9.
Are provided so as to be rotatable left and right. Note that the leading end of the connecting portion 9a on the transport source side is rotatable up and down within a predetermined angle range, and the leading end can be arranged obliquely as shown in FIG.
The motor 2a is attached to the connecting portion 9b on the transfer destination side.

Each of the divisions 9 of the frame 6 is
Steel members 1 having a U-shaped cross section that are arranged in parallel to face each other
It is formed in a substantially ladder shape from 0, 10 and a plurality of beam-shaped members (not shown) which are bridged between these steel materials 10, 10 and join these steel materials 10, 10. The lower ends of the support arms 7, 7 for supporting the first guide member 4 and the support arms 8 for supporting the second guide member 5 are joined to the two steel materials 10, 10 of the respective divided portions 9.. Have been.

Then, the first and second guide members 4 and 5 are supported by the respective divided portions of the frame 6 by the support arms 7 and 8. By rotating each of the divided portions 9 of the frame portion 6 left and right with each other, it is possible to arrange the endless belt 3 supported by the frame portion 6 in a state where it is curved to the left and right to some extent. The conveyed object can be bent.

As shown in FIG. 2, the frame portion 6 is provided with a steady rest 11 near the support arms 7 and 8. The steady rest 11 is made of the steel material 10 of the frame 6.
A support shaft 11a attached to the base plate and two steady rest plates (sway rest members) 11b, 11b arranged in parallel with each other.
And a roller portion 11c having The lower end of the support shaft 11a is fixed to the steel material 10, and is erected so as to face diagonally upward toward the opposed steel material.

The steady rest plates 11b, 11b are
It is a donut plate shape, and has two steady plates 11
b, 11b and the roller portion 11c are coaxially arranged. The roller portion 11c is rotatably supported by the support shaft 11a, and is rotatable integrally with the steadying plates 11b.

The position of the roller portion 11c is a position where the side edge of the return portion 3b of the endless belt 3 is arranged between the two steady rest plates 11b, 11b. Then, the steady rest 11 includes two steady rest plates 11b, 11b.
b, the side edge of the return portion 3b of the endless belt 3 is disposed to prevent the side edge of the endless belt 3 from waving and waving during operation of the belt conveyor. is there. When the side edge of the endless belt 3 touches largely in a state where the steadying portion 11 is not provided, the side edge of the endless belt 3 is restricted by the regulating member 4 a of the first guide member 4 or the second edge. There is a possibility that the guide member 5 may exceed the regulating members 5b and 5b, and the steadying portion 11 can prevent the side edge of the endless belt 3 from exceeding the regulating members 4a and 5b.

The deflection of the endless belt 3 is caused by the endless belt 3 being bent at the bending portion when the belt conveyor is bent right and left along a path bent right and left. When the conveyor transport path is straight, the steadying portion 11 is not necessarily required,
The steadying portion 11 may not be provided. Further, the position where the run-out occurs in the endless belt 3 depends on the position of the curved portion on the belt-conveyor conveyance path.
Is required to be determined in accordance with the position of the curved portion of the belt conveyor conveyance path and the degree of curvature of the curved portion, and the steady rest 11 is detachably attached to the frame 6 of the belt conveyor. It is preferable that the installation position can be changed on the conveyor path of the belt conveyor. The steady rest 11 is used for resting the return portion 3b of the endless belt 3.
The steadying portion 11 is also provided on the feed portion 3a side of the endless belt 3.
A steady rest 11 having substantially the same configuration as that described above may be provided.

Next, a method of transporting earth and sand in excavation work of a small-diameter tunnel using the belt conveyor having the above configuration will be described. As shown in FIG. 3, the belt conveyor is arranged such that the division 9a on the transport source side of the frame unit 6 is disposed below the outlet of the screw conveyor 21 of the shielding machine (only the rear end is shown). It is arranged along the excavation direction in the tunnel T.

When the tunnel T is curved at the position where the belt conveyor is disposed, the frame 6
Of each of the divided portions 9 of the frame portion 6
Is bent so that the belt conveyor is curved in accordance with the curvature of the tunnel T. As shown in FIG. 4, when the belt conveyor is disposed in the tunnel T, a power supply unit, a hydraulic unit, and the like are mounted, and the support 2 is attached to a plurality of succeeding bogies 25 connected behind the shield machine 20.
2, the belt conveyor is arranged at the upper part in the tunnel T as shown in FIG. 3 and FIG.

Thus, the belt conveyor can be movably arranged at the upper part in the tunnel T in accordance with the movement of the shield machine 20. Further, the trailing bogie 25 travels on a single track 25a disposed adjacent to the tracks 23a of the slip trolley 23. Support 2
2 is a track 23a of the trailing truck 23 of the trailing truck 25,
From the upper part of the side surface on the 23a side, the track 2
The belt conveyor is provided so as to extend beyond 3a, 23a, and the belt conveyor is arranged above the trolley 23. Therefore, the support body 22 is in a state where one end is supported by the trailing bogie 25, but the other end of the support body 11 is fixed to a segment of the tunnel T along the length direction of the tunnel T by a predetermined length. It is movably supported by brackets 26 provided at intervals. In addition, on the side surface (rear surface) near the inner surface of the tunnel T on the opposite side of the support body 22 of the succeeding bogie 25, a back fall prevention member 27 extending to the inner surface side of the tunnel T is provided.

Since the first guide member is a fixed member having no movable member such as a carrier roller as described above and the cross-sectional area of the belt conveyor is reduced, the vertical width of the belt conveyor is reduced. Also in the small-diameter tunnel T, it is possible to secure a space in which the slip trucks 23 and the following truck 25 can be arranged as shown in FIG. 4 below the belt conveyor disposed in the upper part of the tunnel T. Therefore, it is possible to convey the earth and sand from the shield machine 10 to the rear of the succeeding bogie by the belt conveyor in a state where the succeeding bogie for supplying electric power and hydraulic pressure to the shield machine 20 is arranged near the rear of the shield machine 20.

Further, since the belt conveyor can be bent right and left along the curve of the tunnel T as described above, one belt conveyor extends over a long distance even in the curved portion of the tunnel T. Is possible,
It is possible to arrange a plurality of slip trucks 23 under a belt conveyor arranged above the tunnel T. And the screw conveyor 21 of the shield machine 20
When the excavated earth and sand is carried out of the belt conveyor, the excavated earth and sand is received by the conveyor side of the belt conveyor, and is conveyed to the conveyor destination side of the belt conveyor behind the shield machine 20.

By arranging the leading bogie of the slip trolleys 23 below the division 9b on the side of the conveyor belt, the earth and sand can be loaded from the belt conveyor onto the slip trolleys 23. . In addition, by holding a plurality of slip lorries 23 under the belt conveyor, when the leading slip trolley 23 becomes full, the plurality of linked trolleys 23 are moved one by one. Sediment can be sequentially loaded on the next slip truck 23.

As described above, according to the belt conveyor of this example, since the first guide member 4 is a fixed member having no carrier roller or the like, the vertical width of the belt conveyor can be reduced. The belt conveyor can be used in a narrow place, and workability of the belt conveyor in a narrow place can be improved. In addition, by using a U-shaped belt conveyor as the belt conveyor capable of narrowing the vertical width as described above, the vertical width of the U-shaped belt conveyor having a wide vertical width can be reduced, so that the U-shaped belt conveyor can be easily handled. Thus, the range of use of the U-shaped belt conveyor can be expanded. In the belt conveyor,
Since the number of movable members such as a carrier roller can be reduced, the cost can be reduced and the maintenance can be saved.

When the belt conveyor is used for transport from the shield machine 20 in the tunnel T to the shearing trucks 23 as described above, even if the tunnel T has a small diameter, the U-shaped belt conveyor is shielded. Can be arranged from the machine 20 to the slip trolleys 23 beyond the succeeding bogie 25. Further, since the belt conveyor has a U-shape and is configured to be bendable as described above, even if the tunnel is curved, it is possible to arrange a long belt conveyor along the tunnel T in the tunnel T. it can.

As described above, the U-shaped belt conveyor can be used as described above even in a situation in which the trailing bogie and the slip trucks 23 cannot be arranged side by side because the tunnel T is curved with a small diameter. Since it is possible to arrange from the shield machine 20 to the slip trucks 23 beyond the succeeding bogie 25, the slip trucks 23 from the shield machine 20 can be arranged.
The earth and sand can be conveyed beyond the trailing bogie 25 up to that point.

Further, the belt conveyor can be extended over a long distance by bending the belt conveyor even in a small-diameter curved tunnel T, and the belt conveyor has a narrow vertical width because the belt conveyor has a narrow vertical width. Can be placed under the upper part of the tunnel T, so that a plurality of the slip trolleys 23 can be arranged under the belt conveyor extending long at the upper part of the curved tunnel T. , And the earth and sand can be sequentially loaded on the plurality of slip trucks 23 waiting under the belt conveyor.

Accordingly, only a short flat belt conveyor can be arranged in the curved portion of the tunnel T having a small diameter as in the conventional case, and only one slip truck 23 can be made to stand by under the flat belt conveyor. By loading the earth and sand on the deck slipper 23, one slip truck 23 is reciprocated from the shield machine 20 to the wellhead, and the earth and sand is carried out to the wellhead.
It is possible to prevent a situation where the construction period of the tunnel becomes long.

[0060]

According to the belt conveyor of the first aspect of the present invention, the guide member does not rotate with respect to the orbital movement of the endless belt unlike the carrier roller.
If the guide member is made of a fixed member, for example, a plate or a bar, the cross-sectional area of the guide member can be made smaller than that of a movable member such as a carrier roller. Can be reduced in cross-sectional area. If the cross-sectional area of the belt conveyor is reduced, the belt conveyor can be used in a narrow place, and workability in a narrow place can be improved.

Further, if the number of movable members such as carrier rollers is reduced by using the guide member of the belt conveyor as a fixed member, the cost of the movable member can be reduced, and the structure of the belt conveyor can be simplified to facilitate manufacture. The manufacturing cost of the belt conveyor can be greatly reduced. Further, if the number of movable members such as carrier rollers can be reduced in the belt conveyor, maintenance required for the movable members can be saved. In addition, belt conveyor
U-shaped belt conveyor, U-shaped belt conveyor
Can be narrowed as described above.
Because of the large cross-sectional area, small tunnels
U-shaped belt conveyor, which was difficult to use in narrow places,
It can be used in narrow places, and can be used in U-type belt conveyors.
It becomes possible to greatly expand the enclosure.

Also, there is no space between the rotating bodies.
Move both the upper and lower parts of the end belt
Have a substantially U-shaped cross-section with side edges above the center
As a result, the upper part of the endless belt is U-shaped,
U-shaped rather than the inverted U-shaped lower part of the end belt
The upper and lower width of the belt conveyor can be reduced.
To reduce the cross-sectional area of the guide member
The width of the U-shaped belt conveyor should be significantly reduced.
Can be.

When the guide member for supporting the upper portion of the endless belt which is vertically overlapped between the rotating members is the fixed member as described above, the guide member for supporting the upper portion of the endless belt is used. Is disposed below the upper part of the endless belt, that is, between the upper part and the lower part of the endless belt, so that the guide member has a small sectional area,
That is, if the upper and lower portions are thin, the interval between the upper portion and the lower portion of the endless belt can be reduced, and the vertical width of the entire belt conveyor can be reduced.

According to the belt conveyor according to the second aspect of the present invention, the guide member is a rod-shaped or long thin plate-shaped fixed member, so that the guide member has a movable member such as a carrier roller. The upper and lower thicknesses can be made much thinner than in the case, and the same effect as in the first or second aspect can be obtained.

According to the belt conveyor of the third aspect of the present invention, it is possible to restrict the run-out of the side edge of the endless belt and to prevent the side edge of the endless belt from being wavy. According to the transport method according to the fourth aspect of the present invention, similarly to the effect of the configuration according to any one of the first to third aspects, the upper and lower widths of the belt conveyor are narrowed to improve the workability of the transport operation in a narrow place. Can be improved.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a main part showing a belt conveyor according to an example of an embodiment of the present invention.

FIG. 2 is a perspective view of a main part showing the belt conveyor of the above example.

FIG. 3 is a side view schematically showing the entire belt conveyor of the above example arranged in a tunnel.

FIG. 4 is a sectional view of a main part showing the belt conveyor of the above example arranged in a tunnel.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Roller (rotating body) 2 Roller (rotating body) 3 Endless belt 4 First guide member (fixed member) 5 Second guide member

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Teruo Ariga 4036-1 Nakatsu, Aikawa-cho, Aiko-gun, Kanagawa Prefecture Inside Kokudo Koki Co., Ltd. (56) References JP-A-4-317911 (JP, A) Hei 4-66108 (JP, U) JP-A 56-13407 (JP, U) Registered utility model 3006034 (JP, U) US Patent 5,353,920 (US, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) B65G 15/00-15/28 B65G 15/60-15/64 E02F 7/00

Claims (4)

(57) [Claims] 1. A rotating body disposed at both front and rear ends, and an endless body wound around these rotating bodies, and a feed side portion and a return side portion are vertically arranged between these rotating bodies and orbitally move. A belt, a plurality of belts arranged at intervals between the rotating bodies at the front and rear ends, a guide member for supporting and guiding the endless belt between the rotating bodies from below, and supporting the guide member. A frame portion, wherein the guide member supports and guides an upper feed side portion of the endless belt, and is a substantially U-shaped fixing member fixed against the circumferential movement of the endless belt. A first guide member comprising: a second guide member having a substantially U-shaped shape in which a plurality of arranged carrier rollers support and guide a lower return side portion of the endless belt. Consisting of The upper and lower positions of the second guide member overlap the frame portion, the first guide member has a smaller cross-sectional area than the second guide member, and the upper and lower thicknesses are thinner. The upper portion and the lower portion of the endless belt are regulated by the guide member so that their left and right side edges are substantially U-shaped in cross section with the upper side of the center portion higher than the center portion, and the upper end portion of the endless belt is The left and right side edges of the lower part of the endless belt are raised, so that a part of the left and right sides of the lower part of the endless belt and a part of the left and right parts of the upper part of the endless belt are left and right. A belt conveyor characterized by being arranged side by side. 2. The guide member comprising the fixing member comprises a rod-shaped or long thin plate-shaped fixing member disposed below the endless belt in a direction perpendicular to a length direction of the endless belt. The belt conveyor according to claim 1, wherein: 3. An endless belt disposed on a front side or a front side and a back side of a side edge portion of an endless belt regulated so as to have a substantially U-shaped cross section in which left and right side edges are higher than a center portion. The belt conveyor according to claim 1, further comprising a steady rest regulating member that regulates a swing of a side edge of the belt conveyor. 4. A transport method using the belt conveyor according to claim 1, wherein an object to be transported is transported by the belt conveyor.