JP5749581B2 - Shaft excavation soil discharging apparatus and bucket excavation soil discharging method using bucket elevator - Google Patents

Description

  The present invention relates to a bucket elevator for transporting excavated soil or the like at the time of shaft excavation from the underground to the ground, and in particular, a shaft excavation soil discharging device by a bucket elevator that can be gradually lowered according to an excavation surface that sinks during shaft excavation. And its discharge method.

  Conventionally, as an apparatus for discharging excavated soil generated during shaft excavation, an endless chain in which a cart that can travel in a horizontal direction is provided on a ground machine frame, and a plurality of buckets are provided on a chain wheel provided on the cart. Winding, hanging the chain into the shaft, positioning the lower end of the chain near the bottom of the shaft, carrying the shaft excavated soil to the ground with the bucket of the shaft, and with the depth of the bottom by excavating the shaft, An apparatus has been proposed in which the carriage is horizontally moved to the shaft side, and the lower end of the chain is lowered so as to be adapted to the deep underground.

  In addition, a suspension device such as a crane is fixed on the ground above the opening of the shaft, and a rope with a single bucket for excavating soil at the lower end is suspended from the tip of the crane into the shaft, and the shaft excavating soil is dropped. Has been proposed (Patent Document 2).

  In addition, as a device for discharging excavated soil from deep shafts, a plurality of vertical conveyor belt conveyors are provided in the shaft, and these conveyors are connected by horizontal horizontal conveyors. An apparatus has been proposed that enables discharge of excavated soil from a deep shaft by relaying on a conveyor (Patent Document 3).

JP 56-56406 A JP-A-8-319790 JP 2007-56475 A

  By the way, in the apparatus of the said patent document 1, since the lowest arrival point of a bucket elevator is dependent on the horizontal movement distance of a traveling trolley, there exists a subject that it is difficult to respond to a deep shaft. Another problem is that a large installation space for the machine frame including the horizontal movement rails is required on the ground due to the necessity of providing the horizontal movement rails.

  In the apparatus of Patent Document 2 described above, the excavated soil is discharged by a single bucket, so the excavated soil discharge capacity is low. For example, after the shaft is completed, underground space (tunnel) construction from the shaft bottom to the horizontal direction is performed. However, there is a problem that it cannot be applied to the discharge of a large amount of excavated soil.

  Although the device of Patent Document 3 discloses a device for discharging excavated soil in a deep underground space in the horizontal direction from the bottom of a shaft after excavation of a shaft, the disclosure of excavating soil until completion of the deep shaft is disclosed. Absent.

  The present invention has been made in view of the above-described conventional problems, and excavated soil in the middle of excavation of a shaft can be efficiently discharged, and excavated soil in a horizontal underground space (tunnel) after completion of the shaft is continuously discharged. It is an object of the present invention to provide an excavating soil discharging apparatus using a bucket elevator and an excavating soil discharging method using the discharging apparatus.

In order to achieve the above object, the present invention
First, a head casing installed in a machine frame on the ground, a tail casing that can be connected to the head casing or the intermediate casing , and at least a lower end portion thereof is located in the excavation surface in the shaft or in the vicinity of the excavation surface ; A plurality of intermediate casings that are connectable between the head casing and the tail casing and have upper and lower openings, and are circulated while circulating between the tail casing and the head casing in these casings. A moving circulation chain is provided, a plurality of buckets are attached to the circulation chain, and excavated soil introduced from an inlet of the tail casing is conveyed to the head casing via the intermediate casing by the bucket, and the head casing Circulates the operation of discharging the excavated soil at the excavated soil discharge section of A shaft excavation soil discharge device according elevators, each intermediate casing is provided with a respective connecting Chen inside the bucket is mounted, the upper Symbol head casing and the tail casing and the casing interior of the circulating chain together as well as configured to be able to separate, by lifting at winch provided with the tail casing after separation machine frame, configured so as to drop a distance corresponding to the subsidence of the excavating surface the tail casing by the winch The intermediate casing can be connected between the tail casing and the head casing separated by the lowering of the tail casing, and the connecting chain in the intermediate casing is connected to the head casing side and the head casing. Each connected to the circulation chain on the tail casing side Serial above buckets in the intermediate casing is configured so as to circulate inside the casing, between the upper Symbol the intermediate casing and the head casing connected, and the intermediate casing the new the intermediate casing and connected the already Similarly, by sequentially connecting , the tail casing is gradually lowered according to the subsidence of the excavation surface, and the bucket is configured to be able to discharge excavated soil due to shaft excavation by the bucket. It is comprised by the shaft excavation soil discharge device by a bucket elevator.

  The tail casing can be constituted by a tail casing (6), and is a concept including a state in which an intermediate casing (4) is connected to the tail casing (6). When configured in this manner, the bucket elevator can be constructed toward the excavation surface in the shaft while discharging the shaft excavation soil with the bucket elevator along with the settlement of the excavation surface accompanying the shaft excavation, After the completion of the shaft, the bucket elevator from the ground surface to the final excavation surface of the underground has been completed, so that it can be used as it is for discharging excavated soil from the shaft bottom to the horizontal underground space construction.

  Secondly, the connecting chain of the intermediate casing is locked in the intermediate casing until it is connected to the circulation chain. Consists of excavated soil discharge device.

  Therefore, the connecting chain in the intermediate casing is supported in the intermediate casing until it is connected to the circulation chain of the other casing, and does not fall off from the intermediate casing.

  Third, the intermediate casing is configured such that a window is formed on a side surface of the casing, and the connecting chain inside the casing faces the window. It is comprised by the shaft excavation soil discharge apparatus by the bucket elevator of 2 description.

  Accordingly, the chain can be easily separated and connected through the window of the intermediate casing.

  Fourth, a head casing installed in the machine frame on the ground, and a tail casing connected to the head casing and having at least a lower end portion located in the excavation surface in the shaft or in the vicinity of the excavation surface, A circulation chain that rotates while circulating between the tail casing and the head casing is provided, a plurality of buckets are attached to the circulation chain, and excavated soil introduced from the inlet of the tail casing is placed on the head by the bucket. A shaft excavation soil discharging method using a bucket elevator that circulates the operation of discharging the excavated soil at the excavated soil discharge portion of the head casing, the connecting chain having a bucket attached inside the casing Excavation by excavation of the vertical shaft provided with a plurality of upper and lower intermediate casings When the subsidence proceeds by a predetermined depth, the head casing and the tail casing are separated together with the circulation chain inside the casing, and the separated tail casing is lifted by a winch provided in a machine frame, and the tail casing is separated. The winch is lowered by a distance corresponding to the sinking of the excavation surface, the intermediate casing is connected between the tail casing and the head casing separated by the lowering of the tail casing, The connecting chain is connected to the circulation chains on the head casing side and the tail casing side, respectively, so that the bucket in the intermediate casing can circulate in the casing, corresponding to the sinking of the excavation surface And connecting the intermediate casing and the head The new intermediate casing is sequentially connected in the same manner as the already-connected intermediate casing, and the tail casing is gradually lowered while discharging the excavated soil accompanying the shaft excavation by the bucket. It is comprised by the shaft excavation soil discharge method by the bucket elevator characterized by carrying out.

  The tail casing can be constituted by a tail casing (6), and is a concept including a state in which an intermediate casing (4) is connected to the tail casing (6). When configured in this manner, the bucket elevator can be constructed toward the excavation surface in the shaft while discharging the shaft excavation soil with the bucket elevator along with the settlement of the excavation surface accompanying the shaft excavation, After the completion of the shaft, the bucket elevator from the ground surface to the final excavation surface of the underground has been completed, so that it can be used as it is for discharging excavated soil from the shaft bottom to the horizontal underground space construction.

  Fifth, the connecting chain of the intermediate casing is locked in the intermediate casing until it is connected to the circulation chain. Configured by the method.

  Therefore, the connecting chain in the intermediate casing is supported in the intermediate casing until it is connected to the circulation chain of the other casing, and does not fall off from the intermediate casing.

  Sixth, the intermediate casing is configured such that a window is formed on a side surface of the casing, and the connecting chain inside the casing faces the window, and the chain inside the casing passes through the window. It is comprised by the shaft excavation soil discharge method by the bucket elevator of the said 4th or 5 characterized by performing isolation | separation connection.

  Therefore, the chain can be easily separated and connected through the window of the intermediate casing.

  Seventh, in the shaft excavation soil discharging method by the bucket elevator according to any one of the above fourth to sixth, after excavation of the shaft is completed and the bucket elevator from the ground to the shaft bottom is completed, the shaft from the shaft bottom It is comprised by the shaft excavation soil discharge method by the bucket elevator characterized by discharging | emitting excavation soil by excavating a horizontal hole by the said bucket elevator completed.

  Therefore, after completion of the shaft excavation, the excavated soil accompanying the excavation of the horizontal hole from the shaft bottom can be smoothly discharged to the ground using the already completed bucket elevator.

  The present invention can construct the bucket elevator toward the final excavation surface in the shaft while discharging the shaft excavation soil with the bucket elevator as the excavation surface sinks due to the shaft excavation. Since the bucket elevator from the ground of the shaft to the excavation surface of the ground is completed, it can be used as it is for discharging the excavated soil accompanying the construction of the horizontal underground space from the bottom of the shaft.

  Further, since the intermediate casings are sequentially connected in accordance with the settlement of the shaft excavation surface, it can be applied to shafts of any depth and can be applied to shafts of large depths.

  In addition, a large amount of excavated soil can be discharged by circulation of multiple buckets, and not only the excavation of shaft excavation soil but also the large amount of excavated soil generated by the construction of the underground space in the horizontal direction after excavation of the shaft It can also be applied to emissions.

  In addition, since the bucket elevator from the ground surface of the shaft to the final excavation surface at the bottom of the shaft is completed when the shaft is completed, the same applies to the discharge of excavated soil due to the construction of the underground space in the horizontal direction after the shaft excavation. Can do.

It is a side view of the state which saw through a part inside casing of the shaft excavation soil discharging apparatus by the bucket elevator which concerns on this invention. It is a front view of the state which saw through a part inside casing of a discharge device same as the above. It is the front view of the state which was in the state which connected the intermediate casing of the discharge apparatus same as the above, and saw through a part inside casing. It is a front view of the state which connected the some intermediate | middle casing of the discharge apparatus same as the above, and was seen through a part inside casing. It is a general | schematic expanded side view of the connection part of the intermediate casing of a discharge device same as the above. It is a perspective view of the connection part of the intermediate casing of a discharge device same as the above. It is a perspective view of the connection part of the intermediate casing of a discharge device same as the above. It is a perspective view of the said chain which shows the connection state of the chain of a discharge device same as the above. It is a schematic perspective view of the intermediate casing for connection of a discharge apparatus same as the above. It is a perspective view of the intermediate casing for connection of a discharge device same as the above. (A) is a cross-sectional view in the vicinity of the upper end of the chain showing the locking state of the connecting chain of the discharging device, and (b) is a vertical section in the vicinity of the upper end of the chain showing the locking state of the connecting chain of the discharging device. It is a figure (XX sectional drawing of (a)). It is a perspective view of the foundation horizontal machine frame vicinity which shows the state which moved the intermediate casing of the discharge apparatus same as the above to the connection part. It is a perspective view of the foundation horizontal machine frame vicinity which shows the state which connects the intermediate casing of a discharge apparatus same as the above in a connection part. It is a flowchart which shows the procedure of the shaft excavation soil discharge method by a bucket elevator same as the above.

  Hereinafter, the excavated soil discharging apparatus according to the present invention will be described in detail.

  1 and 2, G is the ground (ground level), 1 is a shaft in the middle of excavation, 1a is the excavation surface of the shaft 1, and is perpendicular to the initial excavation surface 1a in FIG. 1 by a backhoe (not shown). Drilling.

On the basic horizontal machine frame 2d on the ground G, a machine frame 2 constructed by a horizontal rod 2a and a vertical rod 2b is fixed, and a bucket elevator is mounted on the upper horizontal machine frame 2c of the machine frame 2. A cylindrical head casing 3 having a substantially inverted side trapezoidal shape 5 is fixed. Then, a cross-sectional square cylindrical intermediate casing 4 is connected and fixed to the lower end of the head casing 3, and a cross-sectional square cylindrical tail casing 6 is connected and fixed to the lower end of the intermediate casing 4. It hangs down from the ground G into the shaft 1, and its lower end is located close to the initial excavation surface 1 a of the shaft 1. The tail casing 6 may have a lower surface placed on the excavation surface 1a.
As shown in FIGS. 12 and 13, the basic horizontal machine frame 2d is provided with a square opening 2d ′ in the center, and the intermediate casing 4 and the tail casing 6 are vertically moved in the opening 2d ′. It is installed in a state of penetrating to.

  1, the right side is “front”, the left side is “rear”, and “left and right” are described based on the case of facing from the front to the rear as shown in FIG.

On the upper horizontal machine casing 2c above the head casing 3, upper sprockets 7a, 7a 'on the left side of the bucket elevator 5 are pivotally supported in the front-rear direction at the same height, and the upper sprockets 7a, 7a' are supported. The upper sprockets 7b, 7b 'on the right side of the bucket elevator 5 are pivotally supported in the front-rear direction at the same height (see FIG. 2).
A left lower sprocket 8a corresponding to the left upper sprocket 7a, 7a 'is pivotally supported at the lower end of the tail casing 6, and the left side between the upper sprocket 7a, 7a' and the lower sprocket 8a is supported on the left side. A circulation chain (endless chain) 9a is wound and stretched.

  Further, a right lower sprocket 8b corresponding to the right upper sprockets 7b and 7b 'is pivotally supported at a lower end portion of the tail casing 6 at a position where a central axis is common to the lower sprocket 8a. A right circulation chain (endless chain) 9b is wound and stretched between the sprockets 7b and 7b ′ and the lower sprocket 8b (see FIG. 2).

  The upper sprockets 7a and 7b are connected to drive motors M1 and M2 for rotationally driving the sprockets, respectively. By synchronously driving the motors M1 and M2, the left chain 9a and the right chain 9 are driven. 9b can be driven to rotate simultaneously in the directions of arrows A and A '. As the rotation directions of the chains 9a and 9b, the direction in which the bucket 10 descends is indicated by arrow A, and the direction in which the bucket 10 rises is indicated by arrow A '(see FIG. 1). The head casing 3, the intermediate casing 4, and the tail casing 6 are collectively referred to as a casing 5 '.

  In the casing 5 ′, a plurality of buckets 10 are continuously suspended and supported between the left circulation chain 9 a and the right circulation chain 9 b in the longitudinal direction of the chain at a constant interval. The bucket 10 is circulated and driven in the direction of the arrows A and A ′ in the casing 5 ′ by the simultaneous driving of the chains 9 a and 9 b, and from the excavated soil inlet 11 formed in the rear surface 6 b ′ of the tail casing 6. It has the function of accepting excavated soil and transporting it to the ground.

  The upper surfaces of the buckets 10 are opened, and the pivot fulcrums 10c and 10c on the upper left and right side surfaces of the buckets 10 are suspended and supported by a pair of left and right circulation chains 9a and 9b, respectively (see FIGS. 5 and 9). , See FIG. 10), and is usually suspended with the opening facing the upper surface. One bucket 10 is moved downward from the top (in the direction of arrow A) by the rotational drive of the chains 9a and 9b with the left and right side surfaces thereof supported by the chains 9a and 9b. The lower sprocket 8a, 8b is turned in the upward direction (arrow A ′ direction), the excavated soil is conveyed upward in a state where the excavated soil is received at the charging port 11, and the earth and sand conveyed at the upper end of the head casing 3 are transferred. The circulation rotation operation of discharging is repeatedly performed.

  Before and after each of the circulation chains 9a, 9b (in the case of the intermediate casing 4-1, each of the connecting chains 9a-1, 9a-2, 9b-1, 9b-2) in the casing 5 ′, Guide rails 35 (inner guide rails 35a and outer guide rails 35b) are arranged and fixed in the respective casings 5 'in the vertical direction along the respective chains 9a, 9b (see FIGS. 6 and 10). 9b can be moved up and down between the guide rails 35 in the casing 5 '. The inner guide rail 35a and the outer guide rail 35b are collectively referred to as a guide rail 35.

  The guide rail 35 is provided along the circulation path of the chains 9a and 9b in the head casing 3, the intermediate casing 4 (the same applies to an intermediate casing 4-1 described later), and the tail casing 6. As shown in FIG. 6, when connecting the casings (in the case of FIG. 6, the intermediate casing 4 and the intermediate casing 4-1), guide rails 35 a and 35 b ( The four guide rails 35a and 35b (four locations) of the lower casing (for example, the intermediate casing 4) are provided at corresponding positions so that they can be connected in the vertical direction.

  The bucket 10 is in contact with the vertical guide rail 12 at a position near the charging port 11 in the tail casing 6 so that the upper surface opening portion is slightly inclined toward the charging port 11 to receive excavated soil. The bottom doors 10a and 10b are opened by making contact with the horizontal guide rail 13 during horizontal movement between the upper sprockets 7a 'and 7a (between 7b' and 7b) (see FIG. 5). The excavated soil is dropped and supplied onto a discharge conveyor 15 installed at a position below the upper machine casing 2c in the head casing 3 via a discharge hopper 14 in the head casing 3, and the ground on the ground by the discharge conveyor 15 It is conveyed outside the machine casing 2. The excavated soil discharge portion constituted by the discharge hopper 14 and the discharge conveyor 15 is referred to as an excavated soil discharge portion 16.

  As described above, the casing 5 ′ of the excavated soil discharging apparatus according to the present invention includes the head casing 3, the intermediate casing 4 (4-1), and the tail casing 6, which are three types of casings. As shown in FIG. 3, the plurality of intermediate casings 4-1, 4-1,. By connecting between the head casing 3 and the tail casing 6 (or the intermediate casings 4 and 4-1), the excavation soil of the tail casing 6 always corresponds to the depth of the excavation surface 1 a that sinks. The insertion port 11 is configured to be positioned (see FIGS. 3 and 4).

  The head casing 3 constitutes the excavated soil discharge portion 16 at the upper end portion as described above, and a rectangular connection portion flange 3a is formed at the lower end portion (FIG. 1), and the intermediate casing is formed at the connection portion flange 3a. 4 is connected to the upper end connection portion flange 4a by a bolt nut B, and the head casing 3 and the intermediate casing 4 can be detached by detaching the bolt nut B.

  A rectangular window W1 for attaching / detaching a chain is formed at the lower end (connecting portion) of the left side surface 3b of the head casing 3, and the upper end (connecting portion) of the left side surface 4b of the intermediate casing 4 is formed. A rectangular window W2 for attaching and detaching the chain is formed (FIG. 1). When the head casing 3 and the intermediate casing 4 are connected by the connection flanges 3a and 4a, the windows W1 and W2 correspond to each other vertically. Thus, one window W is formed, and the left side circulation chain 9a, 9a (the circulation chain 9a descending in the direction of arrow A and the circulation chain 9a rising in the direction of arrow A 'are arranged from the window W inside the casing 5'. 2 chains).

  Also, a similar rectangular window W1 is formed at the lower end (connecting portion) of the right side surface 3b ′ of the head casing 3, and a similar window W2 is formed at the upper end (connecting portion) of the right side surface 4b ′ of the intermediate casing 4. These windows W1, W2 correspond to form one window W. Corresponding right circulation chains 9b, 9b (two chains of a circulation chain 9b descending in the direction of arrow A and a circulation chain 9b rising in the direction of arrow A ') face the window W.

  Further, a lower end connection portion flange 4c is formed at the lower end portion (connection portion) of the intermediate casing 4, and the connection portion flange 4c is connected and fixed by the upper end connection portion flange 6a of the tail casing 6 and the bolt nut B. ing.

  A rectangular window W1 ′ for attaching / detaching a chain is formed at the lower end (connecting portion) (left side) of the casing side surface 4b of the intermediate casing 4. The circulation chain on the left side inside the intermediate casing 4 from the window W1 ′. 9a, 9a (two chains of a circulation chain 9a descending in the direction of arrow A and a circulation chain 9a rising in the direction of arrow A ′) are confronted (see FIGS. 5 and 6). Further, a window W1 ′ for attaching / detaching the chain is also formed at the lower end (connecting portion) of the right side surface 4b ′ of the intermediate casing 4, and the other circulation chains 9b, 9b (arrows) corresponding to the window W1 ′ are formed. Two chains, a circulation chain 9b that descends in the A direction and a circulation chain 9b that rises in the direction of the arrow A ′, face each other.

  Engagement holes 31 for hook engagement of winches are provided in two places (four places in total) on the front surface 4d and the rear surface 4d 'at the upper end of the intermediate casing 4 (or 4-1) (FIG. 6, 9 and 10), these engagement holes 31 have intermediate casing lifting winches 22 (two on the front side and two on the rear side) fixed to the lower part of the horizontal rod 2a on the upper side of the machine frame 2. The intermediate casing 4 (or 4-1) can be lifted and supported on the lower end portion of the head casing 3 by engaging the four hooks 23 in 3) with the four engagement holes 31 respectively. It is configured as follows.

  In addition, engagement holes 32 for hook engagement of winches similar to the engagement holes 31 are provided at four locations on each of the front surface 6b and the rear surface 6b ′ in the vicinity of the lower end portion of the tail casing 6 (four locations in total). These engagement holes 32 include a total of 4 tail casing lifting winches 24 (two on the front side and two on the rear side) provided in the basic horizontal machine frame 2d of the machine frame 2 described above. By engaging each of the hooks 23, the tail casing 6 (and the intermediate casing 4) can be lifted and supported below the intermediate casing 4-1 (see FIG. 3).

  As shown in FIG. 8, the chains 9 a and 9 b are detached from the T pin 20 at the joint link 17 connecting the chain 9 a (upper side) in the head casing 3 and the chain 9 a (lower side) in the intermediate casing 4. , 20 is detached from the pair of connecting shafts 18, 18 of the joint link 17, and the joint link 17 is detached from the plates 21, 21 constituting both the chains 9a.

  The chain 9a of the head casing 3 and the chain 9a in the intermediate casing 4 (or 4-1) are connected to the plate 21 at the lower end of the chain 9a (upper side) in the head casing 3 and the intermediate casing 4. By connecting the upper end plate 21 of the inner chain 9a (lower side) with the connecting shaft 18 of the joint link 17, and inserting the T pins 20 and 20 into the holes 18a and 18a of the connecting shafts 18 and 18, respectively. It can be carried out. It should be noted that the chain in the casing 5 'can be connected and disconnected in the same manner as described above, including the connection and disconnection of the chains 9a and 9b between the tail casing 6 and the intermediate casing 4.

  What is shown by 4-1 is a plurality of intermediate casings for connection having the same configuration as the intermediate casing 4 (see FIG. 2, FIG. 9, FIG. 10). When the reference numeral 4-1 is used and the intermediate casing or the intermediate casing connected from the beginning is collectively shown, the reference numeral 4 is used.

  Next, the configuration of the intermediate casing 4-1 will be described. As shown in FIGS. 9 and 10, the intermediate casing 4-1 basically has the same configuration as the intermediate casing 4, and the intermediate casing 4 in the bucket elevator 5 of FIG. Along with 9 a and 9 b and the four buckets 10 inside, it has the same configuration as the state removed from the head casing 3 and the tail casing 6.

  Therefore, as shown in FIGS. 9 and 10, the one intermediate casing 4-1 is composed of a cylindrical casing 4 ″ having a short rectangular opening and a substantially rectangular parallelepiped, and the inside of the casing 4 ″ includes the above-mentioned A chain at a position corresponding to the circulation chain 9a, 9a on the left side that moves in the ascending and descending direction, and a connecting chain 9a-1, 9a-2 having a length that fits in the intermediate casing 4-1, Chains corresponding to the circulation chains 9b and 9b on the right side that move in the ascending and descending directions and having lengths that can be accommodated in the intermediate casing 4-1 are provided. ing. That is, in the intermediate casing 4-1, connecting chains 9a-1 and 9b-1 are provided at two positions on the left and right in the front, and connecting chains 9a-2 and 9b-2 are provided at two positions on the left and right in the rear. It has been.

The connecting chains 9a-1, 9a-2, 9b-1, 9b-2 are respectively provided with an inner guide rail 35a and an outer guide rail 35b in the vertical direction on the front and rear sides thereof. It is comprised so that it may be located between rails 35a and 35b. These guide rails 35 are fixed to the inner surface of the intermediate casing 4-1 by angles (not shown) so as to be located at two positions on the front left and right sides and two on the left and right sides in the casing 4-1. After each connecting chain is connected to a chain of another casing, each of the chains 9a-1 and the like is configured to smoothly move in the vertical direction in the space between the guide rails 35a and 35b.
The guide rails 35a and 35b are rails having a substantially “U” -shaped cross section, and the back surfaces 35 ′ are opposed to each other, and a moving space such as the chain 9a-1 is provided between the back surfaces 35 ′ and 35 ′. It is formed (see FIG. 11).

  As shown in FIG. 11, the upper ends of these connecting chains 9a-1, 9a-2, 9b-1, 9b-2 are placed inside the plate 21 at the upper end of each chain. From the through-engagement hole 36 formed in the back surface 35 ′ of the upper end portion to the through-engagement hole 37 formed in the back surface 35 ′ of the upper end portion of the outer guide rail 35b, the fixing pin 26 is formed in the chain. When the fixing pin 26 engages with the roller 27 of the plate 21, the connecting chain 9a-1 and the like are connected to the guide rails 35a and 35b by the fixing pin 26. It is suspended and supported at the upper end of the. That is, the connecting chains 9a-1, 9a-2, 9b-1, 9b-2 do not fall from the lower opening of the intermediate casing 4-1, and the guide rails 35 in the intermediate casing 4-1, respectively. It is locked to the upper end (see FIG. 10).

As shown in FIG. 11A, the fixing pin 26 is composed of a main body portion 26a inserted into the chain plate 21 and a retaining portion 26b having a U-shaped cross section that engages with the guide rail 35. The main body 26a is inserted horizontally from the front side of the inner guide rail 35a into the through-engagement hole 36 so as to be orthogonal to the chain, penetrates through the plate 21 of the chain, and the outer guide rail 35b. The chain is locked to the guide rail 35 by being inserted into the through-engagement hole 37, and the retaining portion 26b is engaged with the inner surface of the guide rail 35a, thereby preventing the chain from being pulled out. (See FIG. 11A).
The lower ends of the connecting chains 9a-1, 9a-2, 9b-1, 9b-2 are also provided with the fixing pins 26 at the lower ends of the guide rails 35a, 35b, similarly to the upper ends. Are locked. That is, inside the plate 21 at the lower end of each chain, through the through-engagement hole 36 formed in the back 35 'of the lower end of the inner guide rail 35a, the back 35 of the lower end of the outer guide rail 35b. The fixing pin 26 is similarly inserted in the horizontal direction toward the through-engagement hole 37 formed in the above, so that each of the connecting chains 9a-1, 9a-2, 9b-1, 9b-2 The lower end is supported by the lower end of each guide rail 35a, 35b by the fixing pin 26 (see FIG. 10). The lower end portion of the chain is also locked to the lower end of the guide rail 35 by the fixing pin 26 because the connecting chain 9a-1 and the like during the movement of the intermediate casing 4-1 are moved. This is to prevent it.

The chain locking structure by the fixing pin 26 is the same as in FIG. 11 in the other casings, and the upper end and lower end of the guide rail 35 (35a, 35b) inside the intermediate casing 4 (FIG. 1). In the intermediate casing 4, the through-engagement holes 36 and 37 for locking the upper and lower ends of the separated chains 9a, 9a, 9b and 9b are also provided in the intermediate casing 4, and the separated chain 9a , 9a, 9b, 9b are locked to the guide rail 35 (four places) by the fixing pin 26 to prevent the chains 9a, 9b from falling down after being separated. Configured to get.
Further, the lower end of the guide rail 35 (35a, 35b) at the lower end inside the head casing 3 is also similar to FIG. 11 for locking the lower end of the separated chains 9a, 9a, 9b, 9b. The through-engagement holes 36 and 37 are provided, and the lower end portions of the chain 9a, 9a, 9b and 9b on the side of the intermediate casing 4 and the separated head casing 3 are connected to the head casing by the fixing pin 26. Similarly, it is configured to be able to prevent movement of the chains 9a and 9b on the side of the head casing 3 after separation by locking to the three side guide rails 35 (four places).

  It should be noted that the upper ends of the connecting chains 9a-1, 9a-2, 9b-1, 9b-2 are engaged with the upper end of each chain inside the plate 21 and provided on the side surface of the casing 4 ". The fixing pin 26 is inserted through a hole (not shown), and the fixing pin 26 engages with the roller 27 of the plate 21, so that the connecting chains 9 a-1 and the like are suspended from the fixing pin 26. In this way, the connecting chains 9a-1, 9a-2, 9b-1, 9b-2 are respectively connected to the upper ends in the connecting intermediate casing 4-1. It is comprised so that it can latch with a part and a lower end part.

  Between the connecting chains 9a-1 and 9b-1, two buckets 10 are suspended and supported in two upper and lower stages by rotating fulcrums 10c and 10c, and the connecting chains 9a-2 and 9b are supported. --2, the two buckets 10 are suspended and supported in two upper and lower stages by means of rotation fulcrums 10c, 10c. Thus, a total of four buckets 10 are provided in one intermediate casing 4-1.

  And each upper end part of each connecting chain 9a-1, 9a-2, 9b-1, 9b-2 in the intermediate casing 4-1 is each corresponding position in the head casing 3 by the joint link 17. It is comprised so that it can connect with the lower end part of circulation chain 9a, 9b. Also, the lower ends of the connecting chains 9a-1, 9a-2, 9b-1, 9b-2 are respectively connected to corresponding positions in the intermediate casing 4 (or tail casing 6) by the joint links 17. The upper ends of the circulation chains 9a and 9b or the upper ends of the connecting chains 9a-1, 9a-2, 9b-1, and 9b-2 at the corresponding positions of the other connecting intermediate casing 4-1. Each part can be connected.

  Since the intermediate casing 4-1 is sequentially connected according to the depth of the shaft 1, a plurality of intermediate casings 4-1 are prepared in advance according to the depth of the shaft 1. Specifically, as shown in FIG. 2, the plurality of intermediate casings 4-1, 4-1,... Are placed on the intermediate casing carriage 28, and the ground G adjacent to the intermediate casing 4. Are lined up. The height T of the intermediate casing 4 or 4-1 is configured to be 2 m, for example. When the excavation of the shaft 1 reaches a depth of 2 m, for example, the intermediate casing 4 and the head casing 3 are divided, and the tail casing 6 is lowered by the winch 24 together with the intermediate casing 4 by about 2 m. The operation of connecting the connecting intermediate casing 4-1 to the space S (about 2 m, see FIG. 3) between the intermediate casing 4 and the head casing 3 is repeated (see FIGS. 12 and 13). Is what you do.

  In FIG. 1, 29 is a conveyor for excavating soil transport provided in the shaft 1, 30 is a hopper for excavating soil, and the excavated soil is put into the hopper 30 by a backhoe, and the bucket elevator 5 Are introduced into the bucket 10 in the elevator 5. Reference numeral 40 in FIG. 7 denotes a fitting plate for closing the window W (windows W1 ′ and W2) after the casing is connected. The window W, the intermediate casing 4 and the connecting portion between the head casing 3 and the intermediate casing 4 The window W at the connection with the tail casing 6 is also closed by the fitting plate 40.

  Since this invention is comprised as mentioned above, next, the discharge method of the earth and sand of a shaft is demonstrated using the apparatus of this invention.

  First, as shown in FIG. 1, a machine frame 2 is constructed on the ground G of the shaft 1, and a bucket elevator 5 including a head casing 3, an intermediate casing 4, and a tail casing 6 is erected in the machine frame 2. To support. At this time, the lower end of the tail casing 6 is installed at a position close to the initial excavation surface 1 a of the shaft 1. Further, the excavated soil transporting conveyor 29 is installed in the shaft 1, and the end of the conveyor is joined to the excavated soil charging port 11 of the tail casing 6. Then, the drive motors M1 and M2 are driven to rotationally drive the bucket 10 (FIG. 14F1).

  Next, the initial excavation surface 1a is excavated with a backhoe (FIG. 14F2). The excavated soil at this time is introduced into the hopper 30 of the conveyor 29 by the backhoe, conveyed to the excavated soil inlet 11 of the tail casing 6 by the conveyor 29, and then introduced into the bucket 10 from the inlet 11. 10 is transported to the upper part of the bucket elevator 5, dropped and supplied to the discharge conveyor 15 from the excavated soil discharge unit 16 at the upper part of the bucket elevator 5, and discharged to the outside of the machine frame 2 by the discharge conveyor 15.

  When the excavation surface 1a is excavated 2 m (FIG. 14F3), the drive motors M1 and M2 are temporarily stopped to stop the rotation of the bucket 10 (FIG. 14F4). Further, the fitting plate 40 at the connecting portion between the head casing 3 and the intermediate casing 4 is removed, and the window W is exposed. After that, the circulation chains 9a and 9b above and below the division part are locked by the fixing pin 26 to prevent the chains 9a and 9b from dropping during the division (FIG. 14F5). That is, the fixing pins 26 are respectively inserted into the plate 21 (four places) at the upper ends of the chains 9a, 9a, 9b, 9b facing the left and right windows W2 of the intermediate casing 4, and the through-engagement holes of the guide rails 35 thereof. The upper ends of the chains 9a, 9a, 9b, and 9b are locked at the four upper ends of the guide rail 35, respectively.

  Similarly, fixing pins 26 are respectively placed in the plates 21 (four locations) at the lower ends of the chains 9a, 9a, 9b, 9b on the head casing 3 side facing the left and right windows W1 of the head casing 3, respectively. The lower end of each of the chains 9a, 9a, 9b, 9b is locked at the four lower ends of the guide rail 35, respectively. (FIG. 14F5).

Such a locking operation can prevent the chains 9a and 9b and the bucket 10 below the intermediate casing 4 from falling (FIG. 14F5).
Next, the hook 23 of the tail casing lifting winch 24 is engaged with the lifting engagement hole 32 of the tail casing 6 so that the tail casing 6 can be lifted by the winch 24 together with the intermediate casing 4 ( 14F6), the bolt and nut B connecting the upper end connection flange 4a of the intermediate casing 4 and the lower end connection flange 3a of the head casing 3 is detached, and the lower end of the head casing 3 and the upper end of the intermediate casing 4 are separated. Further, in the circulation chains 9a and 9b connecting the head casing 3 and the intermediate casing 4, the portions of the circulation chains 9a and 9b facing the window W are separated (FIG. 14F7).

  Specifically, in the left circulation chains 9a and 9a (the descending circulation chain 9a and the ascending circulation chain 9a) facing the window W, the chain 9a on the head casing 3 side and the chain 9a on the intermediate casing 4 side are connected. By removing the T pin 20 of the joint link 17 to be removed and detaching the link 17 from the chain 9a, the circulation chain 9a (upper side) on the head casing 3 side and the circulation chain 9a (lower side) on the intermediate casing 4 side Isolate.

  Similarly, in the right circulation chains 9b and 9b (the descending circulation chain 9b and the ascending circulation chain 9b) facing the window W, the joint for connecting the chain 9b on the head casing 3 side and the chain 9b on the intermediate casing 4 side. By removing the T pin 20 of the link 17 and detaching the link 17 from the chain 9a, the circulation chain 9b (upper side) on the head casing 3 side and the circulation chain 9b (lower side) on the intermediate casing 4 side are separated. To do.

With the above operation, the chains 9a and 9b and the bucket 10 in the head casing 3 and the chains 9a and 9b and the bucket 10 in the intermediate casing 4 and the tail casing 5 are separated (FIG. 14F7). By operating the casing lifting winch 24, the intermediate casing 4 and the tail casing 5 are lowered by an amount corresponding to the excavated depth (in this case, 2 m) (state of FIG. 3, FIG. 14F8). In addition, when excavating 2 m or more, it may descend 2 m or more.
FIG. 3 shows a state in which the intermediate casing 4 and the tail casing 6 are lowered by 2 m from the state shown in FIG. At this time, the lower end of the tail casing 6 is positioned in the vicinity of the excavation surface 1a that has been submerged 2 m, and the tip of the excavated soil transport conveyor 29 is joined to the inlet 11 of the lowered tail casing 6. . When the intermediate casing 4 is lowered, a space S of about 2 m for connecting the intermediate casing 4-1 is formed between the intermediate casing 4 and the head casing 3 (see FIG. 3).

  Next, the intermediate casing 4-1 is moved into the space S between the head casing 3 and the lowered intermediate casing 4 with the intermediate casing 4-1 placed on the intermediate casing carriage 28 (states of FIGS. 3 and 12). FIG. 14F9). At this time, the intermediate casing carriage 28 is located on the opening 2d 'of the basic horizontal machine casing 2d.

  Thereafter, the hooks 23 (four locations) of the intermediate casing lifting winch 22 are engaged with the four lifting engagement holes 31 of the intermediate casing 4-1 (FIGS. 3 and 12). The intermediate casing 4-1 is slightly lifted (FIG. 14F10), the transport carriage 28 is removed (FIG. 9F11), and the chains 9a and 9b are connected through the windows W1 and W2 (W) on the left and right sides of the casing (FIG. 14F12).

  Specifically, the plates 21 and 21 at the upper ends of the connecting chains 9a-1 and 9a-2 through the windows W1 (head casing 3 side) and W2 (intermediate casing 4-1 side) on the left side of the casing 5 ′. The plates 21 and 21 of the corresponding circulation chain 9a (the chain descending in the direction of arrow A) and 9a (the chain rising in the direction of arrow A ′) of the head casing 3 are connected to the connecting shaft 18 of the joint link 17 (FIG. 8). , 18 are inserted and T pins 20 and 20 are inserted into the connecting shafts 18 and 18, whereby the circulation chains 9a and 9a on the head casing 3 side and the connecting chain of the intermediate casing 4-1 are connected. 9a-1 and 9a-2 are connected to each other (FIG. 8, FIG. 14F12).

  Further, the plates 21 and 21 at the upper ends of the connecting chains 9b-1 and 9b-2 through the windows W1 (head casing 3 side) and W2 (intermediate casing 4-1 side) on the right side of the casing 5 ′, and the above Corresponding circulation chains 9b of the head casing 3 (chains descending in the direction of arrow A), 9b (chains rising in the direction of arrow A ') are connected to the connecting shafts 18 and 18 of the joint link 17 (FIG. 8). By inserting the T pins 20 and 20 into the connecting shafts 18 and 18, the circulation chains 9b and 9b on the head casing 3 side and the connecting chain 9b-1 of the intermediate casing 4-1 are connected. 9b-2 (FIG. 8, FIG. 14F12).

  With the above operation, the connection between the connection chains 9a-1, 9a-2, 9b-1, 9b-2 on the upper end side of the intermediate casing 4-1 and the circulation chains 9a, 9b on the head housing 3 side is completed. (FIG. 14F12) The intermediate casing 4-1 is slightly lifted by the winch 22 to join the upper end connection flange 4 a of the intermediate casing 4-1 and the lower end connection flange 3 a of the head casing 3. The connection flanges 4a and 3a of the head casing 3 and the intermediate casing 4-1 are joined (FIG. 14F12).

  Next, the lower intermediate casing 4 and the tail casing 6 are lifted so that the upper end portion of the intermediate casing 4 and the lower end portion of the intermediate casing 4-1 are brought close to each other (FIG. 14F13). Connection with the casing 4 is performed (FIG. 3, FIG. 13, FIG. 14F14). Specifically, the correspondence between the lower plates 21 and 21 of the connecting chains 9a-1 and 9a-2 and the lower intermediate casing 4 through the left window W1 'on the lower end side of the intermediate casing 4-1. Connecting the plates 21 and 21 of the circulating chain 9a (the chain descending in the direction of the arrow A) and 9a (the chain rising in the direction of the arrow A ') by inserting the connecting shafts 18 and 18 of the joint link 17; By inserting the T pins 20 and 20 into the shafts 18 and 18, the connecting chains 9a-1 and 9a-2 on the intermediate casing 4-1 side and the chains 9a and 9a of the intermediate casing 4 are connected (see FIG. 8).

  Furthermore, the lower plates 21 and 21 of the connecting chains 9b-1 and 9b-2 and the lower intermediate casing through the window W1 'on the right side of the intermediate casing 4-1 and the window W2 of the intermediate casing 4-1. 4 corresponding plates 9b (chains descending in the direction of arrow A) and plates 21 and 21 of 9b (chains rising in the direction of arrow A ') are connected by inserting the connecting shafts 18 and 18 of the joint link 17, By inserting T pins 20 and 20 into the connecting shafts 18 and 18, the connecting chains 9b-1 and 9b-2 on the intermediate casing 4-1 side and the chains 9b and 9b of the lower intermediate casing 4 are connected. Connect (see FIG. 8).

  The above operation completes the connection between the connecting chains 9a-1, 9a-2, 9b-1, 9b-2 on the lower end side of the intermediate casing 4-1 and the lower chains 9a, 9b on the intermediate casing 4 side. The tail casing 6 is slightly lifted together with the intermediate casing 4 by the winch 24 to join the upper end connection flange 4a of the intermediate casing 4 and the lower end connection flange 4c of the intermediate casing 4-1, The connection flanges 4a and 4c of the intermediate casing 4 and the intermediate casing 4-1 are connected (see FIG. 14F14, FIG. 5 and FIG. 13).

  With the above operation, the connection of the upper and lower end portions of the intermediate casing 4-1 between the head casing 3 and the intermediate casing 4 is completed, and the connecting chain 9a-1 in the intermediate casing 4-1 is completed. , 9a-2, 9b-1, 9b-2 are connected to the circulation chains 9a, 9b in the bucket elevator 5 in an endless state.

Thereafter, the chain fixing pin 26 that locks each chain is removed (FIG. 14F15). That is, the fixing pins 26 (four pieces) for locking the lower ends of the chains 9a, 9a, 9b, 9b of the head casing 3 to the guide rails 35 (four places), the chain 9a- in the intermediate casing 4-1. 1, 9a-2, 9b-1, and 9b-2 are connected to the upper end portions (four locations) and the lower end portions (four locations) of the guide rails 35 in the intermediate casing 4-1, respectively. And fixing pins 26 (four upper ends and four lower ends) locked to the lower ends (four locations), and upper ends of the chains 9a, 9a, 9b, 9b in the lower intermediate casing 4 Are fixed to the guide rails 35 (four places), respectively, to remove each of the fixing pins 26, and each chain is set in a free state so that it can be circulated (FIG. 14F15). After that, the windows W of the connected casings 5 ′ (the windows W at the connection portion between the head casing 3 and the intermediate casing 4-1, and the windows W at the connection portion between the intermediate casing 4-1 and the intermediate casing 4) are fitted. It closes with the board 40 (refer FIG. 14F16 and FIG. 7).
Thereafter, when driving of the drive motors M1 and M2 is resumed, the bucket 10 in the bucket elevator 5 including the four buckets 10 in the connected intermediate casing 4-1 starts to rotate and rotate again (FIG. 14F1). ).

  In this state, the excavation of the excavation surface 1a is resumed by the backhoe, and the excavated soil is introduced into the hopper 30 of the conveyer 29 and conveyed to the inlet 11 of the tail casing 6 by the conveyer 29. 5 is transported to the excavated soil discharge unit 16 on the ground, dropped to the discharge conveyor 15 via the discharge hopper 14 in the excavated soil discharge unit 16, and discharged to the outside of the machine frame 2 by the discharge conveyor 15. Is done.

  Thereafter, every time excavation at a depth of 2 m on the excavation surface 1a is completed, the drive motors M1 and M2 are stopped, the intermediate casing 4-1 is separated from the head casing 3, and the tail casing 6 is operated by the winch 24. And the lowering operation of the intermediate casing 4, 4-1, the moving operation of the intermediate casing 4-1 to be connected, the intermediate casing 4-1, the head casing 3, and the intermediate casing 4 or 4-1 to be connected (tail casing 6 side). And the drive restart operation of the drive motors M1 and M2 are repeated.

  As a result, the excavated soil when excavating 2 m is sequentially carried out to the ground by the bucket elevator 5, and every time 2 m is excavated, between the head casing 3 and the intermediate casing 4-1 of the bucket elevator 5. The intermediate casing 4-1 for new connection is connected, and the bucket casing 5 is gradually lowered while the tail casing 6 of the bucket elevator 5 is lowered in accordance with the sinking of the excavation surface 1a. Excavation work can be performed smoothly while extending downward along the depth of 1 and constantly discharging the excavated soil to the ground.

FIG. 4 shows the bucket elevator 5 in a state where five intermediate casings 4-1 are connected. This shaft 1 shows a state in which the excavation surface 1a has further subsided 10 m from the state of the shaft 1 in FIG.
The excavation work further progresses, and finally a shaft 1 of about 40 m, for example, is formed, and when excavation of the shaft 1 at the depth is completed, the excavation work is near the maximum excavation surface 1a at a position 40 m underground from the ground. The bucket elevator 5 in which the lower end portion of the tail casing 5 is located can be constructed.

After excavation of the vertical shaft 1, when excavating a tunnel (horizontal hole) in the horizontal direction (lateral direction) from the excavation surface 1a of the vertical shaft 1, the vertical shaft 1 includes the final excavation surface 1a (vertical bottom). Since the bucket elevator 5 reaching the ground has already been constructed, the bucket elevator 5 can be used as it is for discharging the excavated soil accompanying excavation of the tunnel.
In the above embodiment, the head casing 3, the intermediate casing 4, and the tail casing 6 are connected, and as the excavation of the shaft progresses and the excavation surface sinks, the head casing 3, the intermediate casing 4, The intermediate casing 4-1 is connected between the head casing 3 and the tail casing 6 in the initial state, and the excavation of the vertical shaft proceeds from this state and the excavation surface is changed. The intermediate casing 4 or 4-1 may be sequentially connected between the head casing 3 and the tail casing 6 as it sinks. In this case, the through-engagement hole 36 similar to that shown in FIG. 11 for locking the chains 9a and 9b also at the upper ends of the guide rails 35 (35a and 35b) in the connection portion at the upper end of the tail casing 6. , 37, and the upper ends (four locations) of the chains 9a, 9b separated at the upper end of the tail casing 6 are locked to the guide rail 35 by the fixing pins 26, and the separated chains 9a, 9b, 9b is configured to prevent falling downward.

As described above, the present invention moves the bucket elevator 5 toward the excavation surface 1 a in the shaft 1 while discharging the shaft excavation soil with the bucket elevator 5 as the excavation surface 1 a sinks due to the shaft excavation. After the completion of the shaft 1, the bucket elevator 5 from the ground surface of the shaft 1 to the final excavation surface 1a of the ground is completed, so that the excavated soil accompanying the horizontal underground space construction from the shaft bottom is completed. It can also be used as it is for discharge.
Further, since the intermediate casing 4-1 is sequentially connected in accordance with the settlement of the shaft excavation surface 1a, it can be applied to shafts of any depth, and can be handled without problems even in deep shafts. Is possible.

  In addition, a large amount of excavated soil can be discharged by circulation of the plurality of buckets 10, and not only the excavation of the shaft excavation soil but also a large amount of excavated soil generated due to the construction of the underground space in the horizontal direction after the excavation of the shaft It can be applied without any problem to the discharge of water.

  In addition, when the shaft 1 is completed, since the bucket elevator 5 from the ground of the shaft 1 to the final excavation surface 1a of the bottom is completed, the excavation soil is discharged due to the construction of the underground space in the horizontal direction after the shaft excavation. It can be applied as it is.

  The shaft excavating soil discharging device and the shaft excavating soil discharging method by the bucket elevator according to the present invention is not limited to the discharging of the shaft excavating soil, but is used as it is for discharging the excavating soil accompanying the construction of the underground space in the horizontal direction after the shaft is completed. It can be applied widely to various civil engineering work.

DESCRIPTION OF SYMBOLS 1 Vertical shaft 2 Machine frame 3 Head casing 4,4-1 Intermediate casing 5 Bucket elevator 5 'Casing 6 Tail casing 9a, 9b Circulation chain 9a-1, 9a-2 Connection chain 9b-1, 9b-2 Connection chain 10 Bucket 17 Joint link 22 Intermediate casing lifting winch 24 Tail casing lifting winch 26 Fixed pin 35 Guide rail 35a Inner guide rail 35b Outer guide rail 36, 37 Through-engagement hole W1, W2 Window W1 ', W2' Window W Window

Claims (7)

A head casing that is installed in a machine frame on the ground, a tail casing that can be connected to the head casing or the intermediate casing , and at least a lower end portion thereof is located at or near the excavation surface in the shaft, and the head casing. It is connectable between the tail casing and comprises a plurality of the intermediate casings with upper and lower openings,
In these casings, a circulation chain that rotates while circulating between the tail casing and the head casing is provided, a plurality of buckets are attached to the circulation chain, and the excavated soil introduced from the inlet of the tail casing is A shaft excavation soil discharge device by a bucket elevator that conveys to the head casing through the intermediate casing in a bucket and circulates the operation of discharging the excavation soil at the excavation soil discharge portion of the head casing,
Each of the intermediate casings includes a connecting chain having a bucket attached to the inside.
The upper Symbol head casing and the tail casing while configured so as to the circulating chain together separation of the inner casing, by lifting at winch provided with the tail casing after separation in the machine frame, the winch the tail casing Configured to be able to descend by a distance corresponding to the sinking of the excavation surface,
The intermediate casing can be connected between the tail casing and the head casing separated by the lowering of the tail casing, and the connecting chain in the intermediate casing is connected to the head casing side and the tail casing. The buckets in the intermediate casing are connected to the circulation chain on the casing side so that the bucket can circulate in the casing,
Between the upper Symbol the intermediate casing and the head casing connected, by a new the intermediate casing going to connect sequentially similarly to the intermediate casing connected above already, depending on the subsidence of the excavation face, the tail A shaft excavating soil discharging apparatus using a bucket elevator, wherein the excavating soil accompanying the shaft excavation can be discharged by the bucket while gradually lowering the casing.   2. The shaft excavating soil discharging apparatus by a bucket elevator according to claim 1, wherein the connecting chain of the intermediate casing is locked in the intermediate casing until it is connected to the circulation chain. .   The bucket according to claim 1 or 2, wherein the intermediate casing has a window formed on a side surface of the casing, and is configured so that the connecting chain inside the casing faces the window. Vertical shaft excavation soil discharging device by elevator. A head casing that is installed in a machine frame on the ground, and a tail casing that is connected to the head casing and at least a lower end portion of which is located at or near the excavation surface in the shaft. A circulation chain that rotates while circulating between the head casing is provided, a plurality of buckets are attached to the circulation chain, and excavated soil introduced from the inlet of the tail casing is conveyed to the head casing by the bucket. , A shaft excavation soil discharge method by a bucket elevator that circulates the operation of discharging the excavation soil at the excavation soil discharge portion of the head casing,
A plurality of intermediate casings with upper and lower openings provided with a connecting chain with a bucket attached inside the casing,
When subsidence of the excavation surface by excavation of the shaft progresses to a predetermined depth, the head casing and the tail casing are separated together with the circulation chain inside the casing, and the tail casing after separation is separated into a winch provided in the machine frame. And lift the tail casing by a distance corresponding to the sinking of the excavation surface by the winch,
The intermediate casing is connected between the tail casing and the head casing separated by the lowering of the tail casing, and the connection chain in the intermediate casing is connected to the circulation on the head casing side and the tail casing side. Each of which is connected to a chain and configured so that the bucket in the intermediate casing can circulate in the casing,
Corresponding to the sinking of the excavation surface, the new intermediate casing is sequentially connected in the same manner as the already connected intermediate casing between the connected intermediate casing and the head casing, so that the tail A method for discharging shaft excavated soil by a bucket elevator, wherein the excavated soil accompanying the shaft excavation is discharged by the bucket while lowering the casing gradually.   The shaft excavation soil discharging method by a bucket elevator according to claim 4, wherein the connecting chain of the intermediate casing is locked in the intermediate casing until it is connected to the circulation chain. The intermediate casing has a window formed on the side of the casing, and is configured so that the connecting chain inside the casing faces the window.
6. The shaft excavation soil discharging method by a bucket elevator according to claim 4 or 5, wherein the chain inside the casing is separated and connected through the window. In the shaft excavation soil discharge method by the bucket elevator according to any one of claims 4 to 6,
After the completion of excavation of the shaft and completion of the bucket elevator from the ground to the bottom of the shaft, the excavated soil is excavated by excavating a side hole from the bottom of the shaft, and the bucket elevator discharges the excavated soil. Shaft excavation soil discharge method.

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