JP2005299294A - Carrying out apparatus of excavated soil - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To make it possible to carry out excavated soil in a narrow place. <P>SOLUTION: The carrying apparatus is provided with a starting belt conveyor 14 used from the time immediately after departure of a shield excavator 12 and a belt conveyor for initial excavation to be installed in the rear side after the shield excavator 12 advances forward by a specified distance to a specified forward distance. The advancing belt conveyor 14 is equipped at the rear side of the shield excavator 12 installed in the starting shaft 10 and a vertical storage part 14b storing so as to be able to feeding out, while turning an extension belt 14a repeatedly to the vertical direction. The initial excavation belt conveyor is provided with a horizontal storage part so as to be able of horizontally feeding out the extending belt part after a plurality of times of turning motion. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a method and an apparatus for carrying out excavated earth and sand, and more particularly to an apparatus for carrying out excavated earth and sand from immediately after the start of a large-diameter shield method to the beginning of excavation.

  In recent tunnel construction work with large-section earth pressure shield method, excavation soil is mainly carried out by Zuritro and pumping. However, in the case of pumping, since there is no large-capacity pump, construction is carried out with an unloading capacity that is lower than the excavating capacity of the shield machine. Since there is little installation space in the starter shaft of the excavator, construction is carried out in a state where the capacity of the Zuritro is reduced and the carrying capacity is reduced.

  By the way, as the means for carrying out the excavated soil, not only the slitting and pumping, but also, for example, the Belcon system disclosed in Patent Documents 1 and 2 is known. In the means for carrying out excavated soil by the Belcon method disclosed in these patent documents, a stretching device that is stored so as to fold the stretching belt in the horizontal direction is arranged, and the stretching is performed along with the excavation of the shield machine. The belt is extended to facilitate the excavation work.

However, the method for carrying out excavated soil disclosed in such patent documents has technical problems described below.
JP 2000-213287 A JP 2000-213288 A

  That is, the carrying-out method disclosed in Patent Literatures 1 and 2 is a carrying-out method at a stage where the excavation of the shield machine has progressed to some extent. In the case of the initial excavation of about 200 m, it has not been possible to employ the stretching device that is stored in the start shaft by folding the stretching belt in the horizontal direction.

  The present invention has been made in view of such conventional problems, and an object of the present invention is to carry out excavation earth and sand that can be smoothly discharged from immediately after the start to the initial start. To provide an apparatus.

  In order to achieve the above object, the present invention provides a drilling earth and sand excavated during an initial excavation up to approximately 200 m after a shield excavator is installed in a start shaft and the shield excavator is started. A vertical storage unit that is installed behind the shield machine installed in the start shaft and stores the stretch belt unit so that it can be fed out by turning it a plurality of times in the vertical direction. After the start of the machine, the starting belcon and the shield machine are started forward by a predetermined distance, and then replaced by the starting belcon. And an initial excavation bell-con provided with a horizontal storage unit that can be fed out.

  According to the excavation earth and sand carry-out device configured as described above, the starting bellcon is used for carrying out the excavation earth and sand immediately after the shield machine is started. It has a vertical storage unit that stores it so that it can be fed out, and a shield machine is installed in the start shaft, and there are restrictions on the space that can be used in a plane, but it can be used in the vertical direction. Since there is a space, it is possible to install a start-up bellcon with such a configuration, and when a start-up bellcon with such a configuration is used, the excavation sediment can be carried out immediately after the start of the shield machine without lowering the drilling capacity. Is possible.

  And, in the present invention, after the shield machine has started a predetermined distance, it can be installed by replacing the starting bellcon and placed behind the shield machine and turning the stretch belt part a plurality of times in the horizontal direction. An initial excavation velcon provided with a horizontal storage unit is used.

  In this case, since the horizontal storage unit can store the extended belt unit longer than the vertical storage unit, the belt extending operation performed in conjunction with the excavation of the shield machine is reduced.

  Between the starting bellcon and the shield excavator, there is a lateral pulling bellcon that transfers excavated earth and sand received from the screw conveyor for discharge of the shield excavator to the starting bellcon, and the starting bellcon It can be installed so as to be approximately orthogonal.

  The starting bellcon is a pair of heads and tail pulleys that are rotatably installed at a predetermined interval in the horizontal direction, and a plurality of lower carrier rollers arranged in a row between the heads and tail pulleys, A plurality of upper carrier rollers arranged in a row above the lower carrier roller; and the vertical storage unit provided between the head and tail pulley and provided below the lower carrier roller; and A belt is wound endlessly between the head and tail pulley so as to pass above the carrier roller, and the tail pulley and the upper carrier roller are connected to the lower side of the shield machine, When the machine is moved forward, the stretch belt part of the vertical storage part has a predetermined amount. At the stage of being pulled out, the excavation of the shield machine is stopped, a new belt is added by a predetermined amount, and the added new belt is stored again in the vertical storage unit as a stretched belt unit. The shield machine can be restarted.

  The vertical storage unit includes a plurality of bend pulleys provided below the lower carrier roller, and a plurality of tensions that are arranged vertically below the bend pulleys and are constantly biased away from the bend pulleys. A pulley, and the belt can be turned a plurality of times in the vertical direction between the bend pulley and the tension pulley to form the stretched belt portion.

  The initial excavation velcon includes a pair of head and tail pulleys that are rotatably installed at a predetermined interval in the horizontal direction, and a plurality of lower carrier rollers arranged in a row between the head and tail pulleys, An upper carrier roller disposed in a row above the lower carrier roller, and a horizontal storage unit provided between the head and tail pulley and provided below the lower carrier roller,

  A belt is wound endlessly between the head and tail pulley so as to pass above the horizontal storage unit and the carrier roller, and the tail pulley and the upper carrier roller are connected to the lower side of the shield machine. Then, when the shield belt machine is moved forward with the excavation of the shield machine and the stretch belt part of the horizontal storage unit is fed out by a predetermined amount, the shield machine is stopped from digging and a new belt is joined by a predetermined amount. In addition, after the newly added belt is stored again in the horizontal storage unit as an extended belt unit, the shield machine can be restarted.

  The horizontal storage unit is arranged to be opposed to a plurality of bend pulleys provided on one end side below the lower carrier roller and to beside and be separated from each other at a predetermined interval on a side of the bend pulley. A plurality of tension pulleys biased away from the pulley, and the belt can be turned a plurality of times in the horizontal direction between the bend pulley and the tension pulley to form the stretched belt portion. .

  According to the excavation earth and sand carrying-out device according to the present invention, it is possible to smoothly discharge the excavation earth and sand from immediately after the start to the initial start by effectively utilizing the available space of the start shaft that has relatively little available space. it can.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described in detail with reference to the accompanying drawings. FIG. 1 to FIG. 4 show an embodiment of excavation earth and sand carrying-out apparatus according to the present invention.

  In these unloading devices shown in the same figure, an earth pressure system shield machine 12 is installed in the start shaft 10, and the shield machine 12 is started from the start shaft 10, and then the initial excavation up to about 200 m is performed. It is an unloading device for excavated earth and sand excavated while performing.

  The carrying-out device of the present embodiment is installed at the rear of the starter bellcon 14 used immediately after the start of the shield machine 12, and after the shield machine 12 starts forward by a predetermined distance, in place of the starter bellcon 14. And an initial excavation bellcon 16.

  The start bellcon 14 is installed behind the shield machine 12 installed in the start shaft 10, and is provided with a vertical storage unit 14b that stores the stretchable belt unit 14a by turning it a plurality of times in the vertical direction so as to be able to be fed out. .

  Further, the initial excavation bellcon 16 is provided with a horizontal storage portion 16b for storing the drawable belt portion 16a by turning it a plurality of times in the horizontal direction so as to be fed out. 1 to 3 show the installation state and details of the starting bell-con 14.

  As shown in FIGS. 1 and 2, the starting bellcon 14 shown in these drawings is behind the shield machine 12 so that the longitudinal axis is substantially parallel to the direction of the shield machine 12. It is installed close to.

  A lateral pulling bellcon 18 is installed between the starting bellcon 14 and the shield machine 12. The lateral pulling bellcon 18 is disposed so as to be substantially orthogonal to the longitudinal direction of the starting bellcon 14, and transfers excavated earth and sand received from the soil discharging screw conveyor 20 of the shield machine 12 to the starting bellcon 14. The lateral pulling bellcon 18 is a normal belt conveyor for conveying earth and sand provided with a roller and a belt.

  The screw conveyor 20 for excavating earth and sand provided in the shield machine 12 is connected to the first screw conveyor 20a projecting in the compartment provided in the main body of the machine 12 and the rear end of the conveyor 20a. Second screw conveyor 20b.

  Driving units 20c and 20d are attached to the conveyors 20a and 20b, respectively, and an opening and closing gate 20e is provided in the second screw conveyor 20b. A discharge chute 20f is disposed below the open / close gate 20e, and a conveyance surface of the lateral pulling bellcon 18 faces the discharge chute 20f.

  The horizontal pulling bellcon 18 conveys the excavated earth and sand received from the screw conveyor 20 in the lateral direction of the shield machine 12, and transfers it to the starting bellcon 14 via a chute 22 arranged at the conveying end. .

  As shown in detail in FIG. 3, the starting bellcon 14 has a pair of a head pulley 14 c and a tail pulley 14 d that are rotatably installed at a predetermined interval in the horizontal direction.

  A plurality of lower carrier rollers 14e arranged in a line between the head and tail pulleys 14c and 14d and an upper carrier roller 14f arranged in a line above the lower carrier roller 14e are provided.

  Each of these carrier rollers 14e and 14f is a roller in which three rollers arranged in a concave shape are rotatably supported, and the lower carrier roller 14e is arranged at equal intervals between the head and tail pulleys 14c and 14d. The upper carrier roller 14f is disposed only on the tail pulley 14d side.

  On the other hand, the vertical storage portion 14b is provided between the head and tail pulleys 14c and 14d and is provided below the lower carrier roller 14e. The storage unit 14b shown in FIG. 3 includes three bend pulleys 14g provided below the lower carrier roller 14e, and two tension pulleys 14h disposed below the bend pulley 14g so as to be freely movable up and down. .

  The bend pulley 14g is a pulley for bending the direction of the belt B1 wound around the bend pulley 14g. The tension pulley 14h is arranged at the center position between three bend pulleys 14g arranged at equal intervals, and is supported by a guide frame 14j through which a guide pipe 14i for vertical movement is inserted so as to be movable up and down.

  A weight 14k for biasing the tension pulley 14h downward is attached to the guide frame 14j. Further, a head chute 14l for introducing excavated earth and sand is disposed on the side of the head pulley 14c. With this configuration, the tension pulley 14h is constantly urged by the weight 14k in a direction away from the bend pulley 14g.

  The starting belcon 14 configured in this way is connected to a head pulley 14c by a driving motor (not shown), and the tail pulley 14c and the upper carrier roller 14f (portion surrounded by phantom lines in FIG. 1) are shielded. The excavator 12 side is fixed, and these move forward as the shield excavator 12 excavates.

  Further, a belt B1 having a predetermined width is wound between the head and the tail pulleys 14c and 14d through the top of the carrier rollers 14e and 14f, and the belt B1 is further shown in FIG. The left end bend pulley 14g, the left end tension pulley 14h, the center bend pulley 14g, the right end tension pulley 14h, and the right end bend pulley 14g are wound in this order, and then returned to the head pulley 14c to endlessly. Turned.

  In such a wound state, the stretched belt portion 14a in which the portion of the belt B1 that is turned a plurality of times in the vertical direction between the three bend pulleys 14g and the two tension pulleys 14h is stored so that it can be fed out. It has become.

  In this case, in the initial state, each tension pulley 14h is set to be positioned at the lowest position, and is always urged downward by the weight 14k.

  Further, as shown in FIGS. 1 and 2, a transport bellcon 23 and a vertical bellcon 24 are installed below the head chute 141, and the vertical bellcon 24 extends in the vertical direction along the side surface of the start shaft 10. Extending to the ground side.

  In the start-up bellcon 14 configured as described above, when the shield machine 12 is started from the start shaft 10 and the excavation is started, the excavated earth and sand excavated along with the excavation earth and sand is transferred to the screw conveyor 20 and the horizontal bellcon 18. Are received on the surface of the belt B1 of the start bellcon 14 through the head B1 and fed into the vertical bellcon 24 through the head chute 14l from the end of the belt B1 and carried out of the mine by the vertical bellcon 24.

  In this case, in this embodiment, the tail pulley 14d and the upper carrier roller 14f of the starting bellcon 14 are fixed to the shield machine 12, and therefore move forward together with the shield machine 12.

  When the tail pulley 14d and the upper carrier roller 14f are moved forward together with the seal and the excavator 12, the total length of the belt B1 wound around the belt pulley 1 changes. This can be achieved by extending the stretched belt portion 14b stored in 14b.

  The extension belt portion 14a can be fed out by the tension pulley 14h moving upward against the urging force of the weight 14k. In this case, the belt B1 can be extended even if the extension belt portion 14a is extended. The tension is maintained by the urging force of the weight 14k.

  And if excavation of the shield machine 12 advances and the length corresponding to the extending | stretching belt part 14a stored in the vertical storage part 14b is drawn out, the excavation of the shield machine 12 will be stopped in that stage. .

  Then, a predetermined amount of a new belt is added to the belt B1, and the added new belt is stored again in the vertical storage unit 14b as the stretched belt unit 14a, and then the shield machine 12 is restarted to perform excavation. .

  The details of the initial excavation bellcon 16 are shown in FIG. The initial excavation bell-con 16 shown in the figure is one in which the excavation bell-con 14 is removed after the shield excavator 12 starts forward at a predetermined distance, for example, about 15 m, and installed at that position. A horizontal storage unit 16b is provided for storing the belt unit 16a so that the belt unit 16a can be turned out a plurality of times in the horizontal direction and can be fed out.

  The bellows 16 for initial excavation of the present embodiment has a pair of head pulleys 16c and tail pulleys 16d that are rotatably installed at a predetermined interval in the horizontal direction.

  A plurality of lower carrier rollers 16e arranged in a line between the head and tail pulleys 16c and 16d and an upper carrier roller 16f arranged in a line above the lower carrier roller 16e are provided.

  Each of these carrier rollers 16e, 16f is a roller in which three rollers arranged in a concave shape are rotatably supported, and the lower carrier roller 16e is provided at substantially the same level as the head and tail pulleys 16c, 16d. The upper carrier roller 16f is disposed only on the tail pulley 16d side above the head and tail pulleys 16c and 16d.

  On the other hand, the horizontal storage unit 16b is provided between the head and tail pulleys 16c and 16d and below the lower carrier roller 16e. The horizontal storage portion 16b shown in FIG. 4 is disposed at three horizontal positions of the three bend pulleys 16g provided below the lower carrier roller 14e and the bend pulley 16g so as to be movable in the horizontal direction. Two tension pulleys 16h.

  The bend pulley 16g is a pulley for bending the direction of the belt B2 wound around the bend pulley 16g. Note that the member denoted by reference numeral 16i in FIG. 4 is an intermediate carriage for pressing the belt B2.

  The tension pulley 16h is disposed at the center position between three bend pulleys 16g disposed at equal intervals in the vertical direction, and is placed and supported on a tension car 16j that moves along the longitudinal direction of the conveyor 16.

  In the tension car 16j, the tension pulley 16h gives an urging force in a direction away from the bend pulley 16g, and one end of the wire 16m wound around the winch drum 16l is locked via a plurality of wire sheaves 16k. ing.

  A tension meter 16n for detecting the tension and a load cell 16o are attached to the wire 16m. The winch drum 16l is driven to rotate by a drive motor 16p.

  When the drive motor 16p is driven and the wire 16m is wound around the winch drum 16l, the tension car 16j tends to move away from the bend pulley 16g, so that a biasing force is applied to the tension pulley 16h. .

  A head chute 16q for placing excavated earth and sand is disposed on the side of the head pulley 16c. In addition, the member shown with the code | symbol 16r in FIG. 4 is the sled provided below the lower carrier roller 16e.

  The initial excavation bellcon 16 configured as described above has a drive motor (not shown) connected to the head pulley 16c, and a tail pulley 16c and an upper carrier roller 16f (substantially the same as the starting bellcon 14). These are fixed on the shield machine 12 side, and these move forward as the shield machine 12 moves.

  A belt B2 having a predetermined width is wound around the initial excavation bell-con 16. The belt B2 passes from the head pulley 16c through the upper side of the upper carrier roller 16f and is wound around the tail pulley 16d. Subsequently, the upper end bend bully 16g, the upper end tension pulley 16h, and the center bend shown in FIG. The pulley 16g, the tension pulley 16h at the lower end, and the bend pulley 16g at the lower end are wound in this order, and then wound endlessly so as to return to the head pulley 16c.

  In such a wound state, the stretched belt portion 16a in which the portion of the belt B2 that is turned a plurality of times in the horizontal direction between the three bend pulleys 16g and the two tension pulleys 16h is stored so that it can be fed out. It has become.

  In this case, in the initial state, each tension pulley 16h is set so as to be farthest from the bend pulley 16g in the horizontal direction, and is always urged in the horizontal direction by the tension car 16j.

  1 and 2 is installed below the head chute 16q. The vertical bellcon 24 extends in the vertical direction along the side surface of the start shaft 10 as described above. It extends to the ground side.

  In the initial excavation bellcon 16 configured as described above, when the shield excavator 12 is started from the start vertical shaft 10 and excavation is started, the excavated earth and sand excavated along with the excavated earth and sand is transferred to the screw conveyor 20 and the horizontal pulling bellcon. 18 is received by the belt B2 surface of the initial excavation bellcon 16 and is fed from the end of the belt B2 to the vertical bellcon 24 via the head chute 16q and is carried out of the shaft by the vertical bellcon 24. Become.

  In this case, in this embodiment, the tail pulley 16d and the upper carrier roller 16f of the initial excavation bell-con 16 are fixed to the shield machine 12, and therefore move forward together with the shield machine 12.

  When the tail pulley 16d and the upper carrier roller 16f move forward together with the seal and the excavator 12, the total length of the belt B2 wound around these changes, and this change in the total length includes the horizontal storage section. This can be achieved by extending the stretched belt portion 16b stored in 16b.

  The extension belt portion 16a can be fed out by the tension pulley 16h moving horizontally toward the bend pulley 16g against the urging force of the tension car 16j. In this case, the belt B2 is connected to the extension belt portion 16a. Even if is extended, the tension is maintained by the urging force of the bend pulley 16g.

  And if excavation of the shield machine 12 advances and the length corresponding to the extending | stretching belt part 16a stored in the horizontal storage part 16b is drawn out, the excavation of the shield machine 12 will be stopped in that stage. .

  Then, a predetermined amount of a new belt is added to the belt B2, and the added new belt is stored again in the horizontal storage unit 16b as the stretched belt unit 16a, and then the shield machine 12 is restarted to perform excavation. .

  In the transport of excavated earth and sand using the initial excavation bellcon 16, the lateral pulling bellcon 18 can be used. However, if the bellcon 16 is installed on the rear side of the shield excavator 12, , Not necessarily required.

  The starting bellcon 14 of the present embodiment is used until the shield excavator 12 starts excavating and excavates about 15 m from the starting vertical shaft 10, and in this case, the extension belt portion 14 a of the vertical storage portion 14 b is extended. The possible length is, for example, about 2.4 m.

  In addition, for the initial starting bellcon 16 used thereafter, for example, the stretchable length of the stretching belt portion 16a stored in the horizontal storage portion 16b is suitably about 15 m. Such a bellcon is a shield machine. 12 is used until it is dug about 200m.

  Now, according to the excavating earth and sand carrying-out device configured as described above, the starting bell-con is used for carrying out the excavating earth and sand immediately after the shield excavator 12 is started. Has a vertical storage section 14b that can be turned up and down several times in the vertical direction and stored so that it can be fed out. A shield machine 12 is installed in the start shaft 10, and the space that can be used in a plane is limited. Although there is a space that can be used in the vertical direction, it is possible to install the starter bellcon 14 having such a configuration. When the starter bellcon 14 having such a configuration is used, the excavation ability of the shield machine 12 is improved. It is possible to carry out excavated earth and sand without lowering.

  In the present embodiment, after the shield machine 12 starts forward by a predetermined distance, it is installed behind the shield machine 12 in place of the starting belcon 14, and the extending belt portion 16a is moved a plurality of times in the horizontal direction. An initial excavation bell-con 16 provided with a horizontal storage unit 16b that is turned and stored so as to be fed out is used.

  In this case, since the horizontal storage unit 16b can store the stretched belt unit 16a longer than the vertical storage unit 14b, the belt stretching operation performed as the shield machine 12 is dug is reduced.

  The excavation earth and sand carry-out device according to the present invention enables the removal of excavation earth and sand in a confined area, so it is effective when starting the shield excavator from the starting shaft in the tunnel construction work by the shield excavator. Can be used.

It is side explanatory drawing of the installation state of the start bellcon of the excavation earth and sand carrying-out apparatus concerning this invention. FIG. 2 is a top view of FIG. 1. FIG. 2 is a detailed explanatory diagram of the starting bellcon shown in FIG. It is detailed explanatory drawing of the bell kon for initial excavation of the excavation earth and sand carrying-out apparatus concerning this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Starting pit 12 Shield machine 14 Starting velcon 16 Initial digging velcon 18 Horizontal pulling velcon 20 Screw conveyor

Claims (6)

An apparatus for carrying out excavated earth and sand excavated while performing an initial excavation up to about 200 m after installing a shield excavator in a start shaft and starting the shield excavator,
Installed behind the shield machine installed in the start shaft, and provided with a vertical storage unit for storing the draw belt unit by turning it several times in the vertical direction so that it can be fed out, and used immediately after the shield machine is started A starting bellcon,
After the shield machine has started a predetermined distance forward, a horizontal storage unit is provided in place of the starting belcon and installed behind it to store the stretchable belt unit so that it can be fed out by turning it several times in the horizontal direction. An excavating earth and sand carrying-out apparatus characterized by comprising a bellcon for initial excavation.   Between the starting bellcon and the shield excavator, a lateral pulling bellcon for transferring excavated earth and sand received from the screw conveyor for discharging the shield excavator to the starting bellcon is roughly the same as the starting bellcon. 2. The excavation earth and sand carrying-out apparatus according to claim 1, wherein the excavation earth and sand carrying-out apparatus is installed so as to be orthogonal. The starting bellcon is a pair of heads and tail pulleys that are rotatably installed at predetermined intervals in the horizontal direction, and a plurality of lower carrier rollers arranged in a row between the heads and tail pulleys, A plurality of upper carrier rollers arranged in a row above the lower carrier roller; and the vertical storage unit provided between the head and tail pulley and provided below the lower carrier roller,
Winding the belt endlessly between the head and tail pulley so as to pass above the vertical storage unit and the carrier roller,
The tail pulley and the upper carrier roller are connected to the lower side of the shield machine and moved forward together with the shield machine, and the stretched belt part of the vertical storage unit is fed out by a predetermined amount. Then, the excavation of the shield machine is stopped, a new belt is added by a predetermined amount, and the added new belt is stored again in the vertical storage unit as an extended belt unit, and then the shield machine is re-started. The excavation earth and sand carrying-out apparatus according to claim 1 or 2, wherein the excavation earth and sand is carried out. The vertical storage unit includes a plurality of bend pulleys provided below the lower carrier roller, and a plurality of tensions that are arranged vertically below the bend pulleys and are constantly biased away from the bend pulleys. With a pulley,
4. The excavation earth and sand carrying-out apparatus according to claim 3, wherein the belt is turned a plurality of times in the vertical direction between the bend pulley and the tension pulley to form the extending belt portion. The initial excavation velcon includes a pair of head and tail pulleys that are rotatably installed at a predetermined interval in the horizontal direction, and a plurality of lower carrier rollers arranged in a row between the head and tail pulleys, An upper carrier roller disposed in a row above the lower carrier roller, and a horizontal storage unit provided between the head and tail pulley and provided below the lower carrier roller,
Winding the belt endlessly between the head and tail pulley so as to pass above the horizontal storage unit and the carrier roller,
The tail pulley and the upper carrier roller are connected to the lower side of the shield machine and moved forward together with the shield machine, and the stretched belt part of the horizontal storage unit is fed out by a predetermined amount. Then, the excavation of the shield machine is stopped, a new belt is added by a predetermined amount, and the added new belt is stored again in the horizontal storage unit as an extended belt unit, and then the shield machine is restarted. The excavating earth and sand carrying-out device according to claim 1, wherein the excavating earth and sand is carried out. The horizontal storage unit is arranged to be opposed to a plurality of bend pulleys provided on one end side below the lower carrier roller and to beside and be separated from each other at a predetermined interval on a side of the bend pulley. A plurality of tension pulleys biased away from the pulley,
6. The excavated earth and sand carrying-out apparatus according to claim 5, wherein the belt is turned a plurality of times in the horizontal direction between the bend pulley and the tension pulley to form the extending belt portion.

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