JP6488797B2 - Belt conveyor transport device - Google Patents

Description

  The present invention relates to a belt conveyor conveying apparatus having a bent portion at an intermediate portion of an endless conveyor belt.

  Conventionally, in a tunnel site, when a bent portion exists in a plan view from a face to a wellhead, a plurality of belt conveyor transfer devices are arranged in directions that bend each other at the bent portion. Exchanging excavation generated when excavating the ground was carried out by transiting the conveyor belt conveyor. However, if a plurality of belt conveyor conveying devices are operated simultaneously, the control becomes complicated. Therefore, a belt conveyor conveying device having a single endless conveyor belt that can be bent in the middle of the carrier line has been desired. .

  In such a case, the cited document 1 discloses a belt conveyor type in which a bending portion is formed by a bending device having a plurality of twist rollers between an upstream conveyance path and a downstream conveyance path in a single endless conveyor belt. A transport apparatus is disclosed.

JP 2007-145575 A

  However, using the conveyor belt folding device used in the belt conveyor type conveying device described in the cited document 1, the carrier line 11a of the conveyor belt 11 is bent by 90 ° in a plan view as shown in FIG. Then, the following problems arise.

(1) In the carrier line 11a and the return line 11b of the conveyor belt 11, the twisted portion 13 having a twist angle of 90 ° exists in the vertical direction.
In general, when a conveyor belt is twisted, the twisting angle of the conveyor belt 11 is 45 ° when the twisting angle of the conveyor belt 11 is 45 °, and the belt width is 90 °. The length is required to be 5 times, 180 degrees and 10 times the belt width. For this reason, in FIG. 5, it is necessary to ensure the distance between the shafts of the pair of twisting rollers 12 that is five times the belt width.
In other words, for example, in a small-section tunnel, if the length from the invert of the tunnel to the conveying surface of the carrier line 11a cannot be ensured to be five times the belt width, the bending device 10 is used. I can't.

(2) The torsion roller 12 constituting the bending device 10 and the return line 11b of the conveyor belt 11 in contact with the torsion roller 12 protrude outside the bent portion.
For this reason, for example, when making a design plan for a belt conveyor type transfer device in a tunnel mine, a space for placing the folding device 10 must be secured outside the bent portion of the conveyor belt 11, It is complicated with the work space.

  The present invention has been made in view of the above problems, and its main object is to provide a belt conveyor transport apparatus having a compact bent portion in the height direction or in the plane direction at the intermediate portion of an endless conveyor belt. It is to be.

  In order to achieve such an object, the belt conveyor transport device 5 of the present invention includes an endless conveyor belt 6 stretched between a head pulley 6b and a tail pulley 6a, and a carrier line 7 and a return line at an intermediate portion of the conveyor belt 6. The conveyor belt bending device 1 is provided in the extra length portions 7c and 8c provided in the belt 8 and includes the conveyor belt bending device 1 that bends the conveyor belt 6 in a plan view. In the extra length portion 7c of the carrier line 7, a tail side direction changing pulley 2 that forms a tail side skew portion 7v continuous with the tail side carrier line 7a and a head side skew portion 7vv continuous with the head side carrier line 7b are formed. Head side direction changing pulley 22 and tail side skew portion 7v of the carrier line 7 and head side skew portion. a tail-side turning pulley 2 ′ that includes one twisting pulley 3 that twists vv, and that forms a tail-side oblique portion 8v continuous with the tail-side return line 8a in the extra length portion 8c of the return line 8. A head side direction change pulley 22 'that forms a head side skew portion 8vv continuous with the head side return line 8b, and one tail that twists the tail side skew portion 8v and the head side skew portion 8vv of the return line 8. A tail-side direction changing pulley 2 ′ provided on the return line 8 is provided on the upstream side in the transport direction with respect to the tail-side direction changing pulley 2 provided on the carrier line 7. The head side direction changing pulley 22 ′ provided on the carrier line 7 is more than the head side direction changing pulley 22 provided on the carrier line 7. The tail side direction changing pulleys 2 and 2 ′ and the head side direction changing pulleys 22 and 22 ′ are arranged at the downstream side in the feeding direction, and are spaced in a direction in which the axes intersect with each other at a bending angle θ in plan view. The torsion pulleys 3 and 3 ′ are arranged in a posture in which the in-plane tension of the conveyor belt 6 is balanced in a vertical plane including an equal dividing line L whose axis is equally divided into the bending angle θ. It is characterized by being.

  According to the belt conveyor conveying device 5 described above, the extra length portion 7c of the carrier line 7 is formed in a substantially V-shape that protrudes downward through one twisting pulley 3, and the conveyor belt bending device. 1 in the inner space. For this reason, the extra length portion 7c of the carrier line 7 does not protrude outside the conveyor belt bending apparatus 1 and can be stored compactly in the plane direction.

Moreover, although the tail side skew part 7v and the head side skew part 7vv arranged in a substantially V shape have a torsion part, they extend while being inclined with respect to the vertical direction. For this reason, by appropriately changing the inclination angle with respect to the vertical direction, the extra length portion 7c of the carrier line 7 composed of the tail side skew portion 7v and the head side skew portion 7vv is formed in the inner space of the conveyor belt bending apparatus 1. It is possible to escape to either the height direction or the planar direction.
The same applies to the extra length portion 8c of the return line 8.

  Therefore, in the belt conveyor transport device 5 of the present invention, the extra length portion 7c of the carrier line 7 and the extra length portion 8c of the return line 8 are compact in the height direction or the plane direction in the internal space of the conveyor belt bending device 1. It is possible to form the accommodated bent portion 9.

Furthermore, the axis of the torsion pulley 3 is arranged in a posture that balances the in-plane tension of the conveyor belt 6 in a vertical plane including an equal dividing line L that bisects the bending angle θ. This makes it possible to control the in-plane tension imbalance that is likely to occur in the conveyor belt 6 due to the provision of the extra length portion 7c in the intermediate portion of the carrier line 7. Can be prevented.
The same applies to the extra length portion 8c of the return line 8.

  The belt conveyor transport device 5 of the present invention guides the tail side direction changing pulley 2, the head side direction changing pulley 22, and the extra length portion 8 c of the return line 8 that guide the extra length portion 7 c of the carrier line 7. The axis of the tail side direction changing pulley 2 ′ and the head side direction changing pulley 22 ′ includes an adjusting mechanism for adjusting the in-plane tension of the conveyor belt 6.

According to the belt conveyor transport device 5 described above, the tail side direction change is also necessary when it is necessary to control the in-plane tension of the conveyor belt 6 in the extra length portion 7c of the carrier line 7 in addition to the axis of the torsion pulley 3. It is possible to adjust the in-plane tension of the conveyor belt 6 by the axes of the pulley 2 and the head side direction changing pulley 22 so as to control the balance accurately.
The same applies to the extra length portion 8c of the return line 8.

  The belt conveyor transport device 5 according to the present invention is configured such that a tail-side turn-back of the tail-side carrier line 7a is performed on the carrier line 7 of the conveyor belt 6 so that the tail-side carrier line 7a is folded downstream in the transport direction and upward in the height direction. A pulley 4 is disposed, and a head-side folding pulley 44 that folds the head-side carrier line 7b is disposed upstream of the head-side direction changing pulley 22 in the conveying direction and above the height direction. The pulley 4 is arranged above the head side folding pulley 44 in the height direction and above the carrier line 7b located downstream of the head side folding pulley 44 in the transport direction.

  According to the belt conveyor transport device 5 described above, the tail-side folding pulley 4 is disposed above the carrier line 7 b located on the downstream side in the transport direction from the head-side folding pulley 44. As a result, an intersection between the tail-side carrier line 7a and the head-side carrier line 7b is formed in a plan view, so that it is possible to reliably transfer a conveyed product from the tail-side carrier line 7a to the head-side carrier line 7b. Become.

  According to the present invention, the conveyor belt bending apparatus 1 including the twisting pulleys 3 and 3 ′ is installed in the extra length portions 7 c and 8 c provided in the carrier line 7 and the return line 8 of the conveyor belt 6, respectively. In order to guide the surplus length portions 7c and 8c into a substantially V-shape projecting downward at 3 'and to accommodate the surplus length portions 7c and 8c inside the bent portion 9 formed by the conveyor belt bending apparatus 1. The bent portion 9 can be configured to be compact in the height direction or the planar direction.

It is a side view which shows the whole structure of a belt conveyor conveying apparatus. It is a top view which shows the detail of the bending part of a belt conveyor conveyance apparatus, and a conveyor belt bending apparatus. It is a perspective view which shows the detail of a conveyor belt bending apparatus. It is a figure which shows the side surface of a torsion pulley. It is a figure which shows the conventional belt conveyor conveyance apparatus.

  In the present embodiment, a case where the belt conveyor transport device 5 of the present invention is installed in a tunnel and transports excavation gaps generated by the excavation of a tunnel excavator will be described as an example with reference to FIGS.

  As shown in FIG. 1, the belt conveyor transport device 5 includes an endless conveyor belt 6 that continues from the vicinity of the face F of the tunnel T toward the wellhead M direction. The conveyor belt 6 is stretched between a tail pulley 6a disposed in the vicinity of the face F and a head pulley 6b disposed in the direction of the wellhead M, and functions as a carrier line 7 on the upper side and a return line 8 on the lower side. A conveyor belt bending apparatus 1 as shown in the plan view of FIG. 2 is installed at an intermediate portion between the carrier line 7 and the return line 8.

  In the present embodiment, as shown in FIG. 3, the face F side of the carrier line 7 is referred to as a face F side carrier line 7 a and the hole M side is referred to as a hole M side carrier line 7 b across the conveyor belt bending device 1. Further, a portion between the face F side carrier line 7a and the wellhead M side carrier line 7b is referred to as a surplus portion 7c of the carrier line.

  Similarly, across the conveyor belt bending apparatus 1, the face F side of the return line 8 is referred to as a face F side return line 8a, and the pit M side is referred to as a pit M side return line 8b. Further, the space between the face F-side return line 8a and the wellhead M-side return line 8b is referred to as an extra length portion 8c of the carrier line.

  In other words, the conveyor belt bending device 1 is installed in the surplus length portion 7 c of the carrier line 7 and the surplus length portion 8 c of the return line 8 to form the bending portion 9 of the belt conveyor transport device 5.

Hereinafter, the engagement between the conveyor belt bending apparatus 1 and the extra length portion 7c of the carrier line 7 and the extra length portion 8c of the return line 8 will be described in detail.
In this embodiment, as shown in FIG. 2, the bending angle θ of the conveyor belt bending apparatus 1 is set to 90 ° so that the endless conveyor belt 6 has a shape along the tunnel T bent at a bending angle of 90 °. .

  As shown in the perspective view of FIG. 3, the conveyor belt bending apparatus 1 includes the direction change pulleys 2 and 22 on the face F side and the wellhead M side on which the extra length portion 7 c of the carrier line 7 is guided, the torsion pulley 3, and the face F In addition to turning pulleys 4 and 44 on the side and the wellhead M side, there are provided direction change pulleys 2 'and 22' and a twisting pulley 3 'on the face F side and the wellhead M side on which the extra length portion 8c of the return line 8 is guided. ing.

<Connection between the conveyor belt bending apparatus 1 and the extra length portion 7c of the carrier line>
As shown in FIG. 2, the direction change pulleys 2 and 22 on the face F side and the wellhead M side on which the extra length portion 7c of the carrier line 7 is guided intersect each other at a bending angle θ = 90 ° in a plan view. It arrange | positions at intervals toward the direction to do. The direction change pulleys 2 and 22 on the face F side and the wellhead M side are both formed to be able to move to the upstream side in the transport direction of the carrier line 7 or downstream in the transport direction.

  In FIG. 3, the direction change pulley 2 on the face F side is arranged to be higher than the direction change pulley 22 on the wellhead M side, but is not necessarily limited to this height position. For example, the face F side direction changing pulley 2 and the wellhead M side direction changing pulley 22 may be arranged at the same height.

  As shown in FIG. 3, one torsion pulley 3 is disposed between the direction change pulleys 2 and 22 on the face F side and the wellhead M side and obliquely below in a side view. Thereby, the surplus length portion 7c of the carrier line 7 is twisted between the face F-side skewed portion 7v located between the face changing pulley 2 on the face F side and the twisting pulley 3, and the direction changing pulley 22 on the wellhead M side. It is formed in a substantially V-shape consisting of a wellhead M-side inclined portion 7 vv located between the pulley 3.

  For this reason, as shown in FIG. 2, the extra length portion 7 c of the carrier line 7 is stored compactly in the inner space of the conveyor belt bending apparatus 1 in a plan view and does not protrude outside the bent portion 9.

  At this time, as shown in FIG. 2, the axis of the torsion pulley 3 is arranged in a vertical plane including an equal dividing line L that bisects the bending angle θ = 90 °. When viewed from the axis of the direction change pulleys 2 and 22 on the face F side and the wellhead M side, the angle is swung by 45 ° (90 ° −θ / 2) in plan view. That is, each of the face F-side oblique portion 7v and the wellhead-side M-side oblique portion 7vv has a torsion portion in which the lower end portion is twisted by 45 ° (90 ° −θ / 2) with respect to the upper end portion.

  As described above, the distance between the shafts of the pulleys that are paired across the twisted portion of the conveyor belt is 2.5 times the belt width when the twist angle of the conveyor belt is 45 °, 5 times the belt width when 90 °, A length of 10 times the belt width at 180 degrees is required. In this way, the distance between the axes of the pulleys that make a pair with the torsion part sandwiched is limited by the minimum value thereof, so the belt length of the conveyor belt located between these pairs of pulleys is also limited by the minimum value. Will receive.

  However, the tail side skew portion 7v and the head side skew portion 7vv each having a twisted portion extend in the conveyor belt bending apparatus 1 while being inclined with respect to the vertical direction as shown in FIG. Therefore, for example, the distance between the axis of each of the direction change pulleys 2 and 22 on the face F side and the wellhead M side and the axis of the torsion pulley 3, that is, the belt length of the tail side skew portion 7v and the head side skew portion 7vv is set in advance. It is set to be the shortest length that should be secured when the twist angle is (90 ° −θ / 2).

  In the present embodiment, since the twist angle is 45 °, the lengths of the face F side inclined portion 7v and the wellhead M side inclined portion 7vv are set to 2.5 times the belt width of the conveyor belt 6. Yes.

  Then, the face F side direction changing pulley 2 is moved to the upstream side in the conveying direction and the wellhead M side direction changing pulley 22 is moved to the downstream side in the conveying direction, so that the face F side direction changing pulley 2 and the wellhead M side direction changing pulley 22 are moved. Take a large distance in plan view. Then, the height position of the torsion pulley 3 rises, and the extending direction of the tail side skew portion 7v and the head side skew portion 7vv approaches the horizontal direction. Thereby, the height dimension of the extra length portion 7c of the carrier line 7 is shortened.

  Thus, even if the belt lengths of the tail-side skew portion 7v and the head-side skew portion 7vv are not changed, the extra length portion 7c of the carrier line 7 is formed in the height direction in the internal space of the conveyor belt bending apparatus 1. It becomes possible to store compactly.

  By the way, as can be seen from FIG. 2 and FIG. 3, the face F-side inclined portion 7v and the wellhead M-side inclined portion 7vv have torsion portions that are substantially plane-symmetric with each other, and the lower end portions are continuous. In the belt width direction, an in-plane tension is imbalanced between one side end facing the corner of the conveyor belt bending apparatus 1 and the other side end.

  For this reason, as shown in FIG. 4, the torsion pulley 3 moves the position of the axis line closer to the corner of the bent portion and the horizontal line in the vertical plane including the equal dividing line L that bisects the bending angle 90 °. It is arrange | positioned in the attitude | position which makes it incline with respect to and balance the in-plane tension | tensile_strength of the conveyor belt 6 located in the extra length part 7c of the carrier line 7. FIG.

  This makes it possible to control the in-plane tension imbalance that is likely to occur in the conveyor belt 6 due to the provision of the extra length portion 7c in the intermediate portion of the carrier line 7. Can be prevented.

  The torsion pulley 3 can be arranged in a posture that balances the in-plane tension of the conveyor belt 6, and follows the movement of the face F side direction changing pulley 2 and the wellhead M side direction changing pulley 22 in the height direction. Although not shown so as to be able to move, an adjustment mechanism is provided that can freely change the inclination and position in a vertical plane including the equal dividing line L that bisects the bending angle θ.

<Connection between the conveyor belt bending device 1 and the extra length 8c of the return line>
On the other hand, the direction change pulleys 2 ′ and 22 ′ on the face F side and the wellhead M side where the surplus length portion 8 c of the return line 8 is guided are also connected to the face F side and the wellhead M where the surplus length portion 7 c of the carrier line 7 is guided. As in the case of the direction change pulleys 2 and 22, as shown in FIG. 2, they are arranged with an interval in a direction in which their axes intersect at a bending angle of 90 ° in a plan view. The direction change pulleys 2 'and 22' on the face F side and the wellhead M side are both formed so as to be able to move upstream in the transport direction and downstream in the transport direction.

  Further, the twisting pulley 3 ′ to which the extra length portion 8 c of the return line 8 is guided is similar to the torsion pulley 3 to which the extra length portion 7 c of the carrier line 7 is guided. It arrange | positions in the vertical plane containing the equal dividing line L to divide.

  Therefore, the surplus length portion 8c of the return line 8 also includes the face F-side oblique portion 8v located between the direction change pulley 2 'and the twist pulley 3' on the face F side, and the wellhead M, as shown in FIG. It is formed in a substantially V-shape comprising a wellhead M-side oblique portion 8vv located between the side direction changing pulley 22 'and the twisting pulley 3'. And, similarly to the face F side inclined portion 7v and the wellhead M side inclined portion 7vv of the carrier line 7, the lower end portion has a twisted portion twisted by 45 ° (90 ° −θ / 2) with respect to the upper end portion. doing.

  As shown in FIG. 4, the torsion pulley 3 ′ is arranged such that its axial line balances the in-plane tension of the conveyor belt 6 positioned in the extra length portion 8 c of the carrier line 8. Therefore, the conveyor belt 6 can be arranged in a posture in which the in-plane tension is balanced, and can move in the height direction following the movement of the face F side direction changing pulley 2 'and the wellhead M side direction changing pulley 22'. Although not shown, an adjustment mechanism is provided that can freely change the inclination and position in the vertical plane including the equal dividing line L that bisects the bending angle θ.

  As shown in FIG. 3, the direction change pulley 2 ′ on the face F side is disposed upstream of the direction change pulley 2 on the face F side for guiding the carrier line 7, and the direction change pulley on the wellhead M side. 22 ′ is arranged on the downstream side in the transport direction from the direction changing pulley 22 on the wellhead M side for guiding the carrier line 7. For this reason, as shown in FIG. 2, the surplus length portion 8c of the return line 8 and the surplus length portion 7c of the carrier line 7 are displaced in a plan view and do not interfere with each other.

  As shown in FIG. 3, in the belt conveyor transport apparatus 5 having the above-described configuration, the surplus length portion 7c of the carrier line 7 and the surplus length portion 8c of the return line 8 are respectively passed through one twisting pulley 3, 3 ′. The face F side oblique portions 7v, 8v and the wellhead M side oblique portions 7vv, 8vv are formed in a continuous substantially V shape and are disposed in the inner space of the conveyor belt bending apparatus 1. For this reason, as shown in FIG. 2, the surplus length portion 7c of the carrier line 7 and the surplus length portion 8c of the return line 8 do not protrude outside the conveyor belt bending apparatus 1 and are stored compactly in plan view.

  Further, the surplus length portion 7c of the carrier line 7 and the surplus length portion 8c of the return line 8 are, as described above, the face F side direction changing pulleys 2 and 2 'constituting the conveyor belt bending device 1, and the wellhead M side direction changing. Adjust the plane position or height position of the pulleys 22 and 22 ′ and the torsion pulleys 3 and 3 ′, and appropriately adjust the inclination angles of the face F side skewed portions 7v and 8v and the wellhead M side skewed portions 7vv and 8vv with respect to the vertical direction. By changing, it is possible to shorten the height dimension without changing the belt lengths of the face F-side skewed portions 7v, 8v and the wellhead M-side skewed portions 7vv, 8vv.

  Thereby, for example, even if the construction site has a low head space, the height of the extra length portion 7c of the carrier line 7 and the extra length portion 8c of the return line 8 is adjusted according to the height of the low head space, The belt conveyor transfer device 5 can be employed.

  When the face F side direction changing pulleys 2 and 2 ′ are moved to the upstream side in the conveying direction and the wellhead M side direction changing pulleys 22 and 22 ′ are moved to the downstream side in the conveying direction to increase the distance in plan view between them. As shown in the plan view of FIG. 2, the torsion pulleys 3, 3 ′ and the extra length portion 7 c of the carrier line 7 and the extra length portion 8 c of the return line 8 are moved away from the corner of the conveyor belt bending apparatus 1. The space in the plane direction inside the belt conveyor bending apparatus 1 is largely occupied.

  For this reason, when there is room in the height direction of the construction site, but it is narrow and it is desired to use the inner space of the conveyor belt bending apparatus 1 as a work area, the face F side direction change pulleys 2 and 2 ′ and the wellhead M side direction change. What is necessary is just to adjust distance with pulleys 22 and 22 'suitably, and to take the planar view distance between both small.

  As a result, the torsion pulleys 3 and 3 ′ are lowered in height, but the planar position approaches the corner of the conveyor belt bending apparatus 1. Thereby, the surplus length portion 7c of the carrier line 7 and the surplus length portion 8c of the return line 8 can reduce the area that occupies the space in the plane direction in the inner space of the belt conveyor bending apparatus 1.

  In this way, the belt conveyor transport device 5 allows the extra length portion 7c of the carrier line 7 and the extra length portion 8c of the return line 8 to be arranged in the height direction or in the inner space of the conveyor belt bending device 1 according to the situation at the construction site. It is possible to escape to any region in the plane direction, and it is possible to increase the degree of freedom of the place where the belt conveyor conveyance device 5 of the present invention is installed.

  In addition, the belt conveyor conveyance apparatus 5 of this invention is not limited to this Embodiment, A various change is possible in the range which does not deviate from the meaning of this invention.

  For example, with respect to all the axis lines of the direction change pulleys 2, 2 ′, 22, 22 ′ on the face F side and the wellhead M side, the face F side oblique portions 7v and 8v and the wellhead M side oblique portions 7vv and 8vv are twisted more. An adjustment mechanism that adjusts the in-plane tension of the conveyor belt 6 by rotating in the horizontal direction or the vertical direction may be provided.

  In this case, when it is necessary to control the in-plane tension of the conveyor belt 6 in the extra length portion 7c of the carrier line 7 and the extra length portion 8c of the return line 8 in addition to the axis of the torsion pulleys 3 and 3 ′. Also, the in-plane tension of the conveyor belt 6 is controlled to be balanced more accurately by adjusting the inclination and the position of the axis of the tail side direction changing pulleys 2, 2 ′ and the head side direction changing pulleys 22, 22 ′. It becomes possible to do.

  The adjustment mechanism is a mechanism that can freely change the rotational movement in the horizontal direction and the vertical direction for each of the axis lines of the direction change pulleys 2, 2 ′, 22, 22 ′ on the face F side and the wellhead M side, Any adjustment mechanism may be used.

  In the present embodiment, the conveyor belt bending apparatus 1 having the above-described configuration is provided with folding pulleys 4 and 44 on the face F side and the wellhead M side on which the extra length portion 7c of the carrier line 7 is guided. As shown in FIG. 3, these are arranged in parallel with each of the direction change pulleys 2 and 22 on the face F side and the wellhead M side in a plan view. The folding pulley 4 on the face F side is disposed on the downstream side in the conveying direction and above the height direction with respect to the direction changing pulley 2 on the face F side. Further, the folding pulley 44 on the wellhead M side is disposed on the upstream side in the transport direction and on the upper side in the height direction with respect to the direction changing pulley 22 on the wellhead M side.

  As a result, in the folding pulley 4 on the face F side, the leading edge of the face F carrier line 7a protrudes from the direction changing pulley 2 on the face F side to the downstream side in the transport direction and is folded back, so that the extra length portion 7c. Is continued. Further, in the turn-around pulley 44 on the wellhead M side, the wellhead M-side carrier line 7b has its rear end projected from the direction change pulley 22 on the wellhead M side to the upstream side in the transport direction and is turned back, so that the extra length portion 7c. Is continued.

  Accordingly, the folding pulley 4 on the face F side is made higher than the folding pulley 44 on the wellhead M side, and disposed above the wellhead M side carrier line 7b on the downstream side in the transport direction from the folding pulley 44 on the wellhead M side. The face F side carrier line 7a and the wellhead M side carrier line 7b intersect in plan view. Thereby, it becomes possible to reliably transfer the conveyed product from the face F side carrier line 7a to the wellhead M side carrier line 7b.

DESCRIPTION OF SYMBOLS 1 Conveyor belt bending apparatus 2 Direction change pulley 22 of face F side (tail side) Direction change pulley 3 of wellhead M side (head side) Torsion pulley 4 of face F side (tail side) Folding of face F side (tail side) Pulley 44 Folding pulley 5 on the wellhead M side (head side) Belt conveyor transport device 6 Conveyor belt 6a Tail pulley 6b Head pulley 7 Carrier line 7a Face F side (tail side) carrier line 7b Wellhead M side (head side) carrier line 7c Extra length portion 7v Face F side (tail side) skew part 7vv Wellhead M side (head side) skew part 8 Return line 8a Face F side (tail side) carrier line 8b Wellhead M side (head side) carrier line 8c Long part 8v Face F side (tail side) skew part 8vv Wellhead M side (head side) skew part 9 Bending part 10 Bending device 1 Conveyor belt 12 Torsion roller 13 torsion unit such dividing line T tunnel F Face M wellhead L

Claims (3)

An endless conveyor belt 6 stretched between a head pulley 6b and a tail pulley 6a, and extra length portions 7c and 8c provided in a carrier line 7 and a return line 8 in an intermediate portion of the conveyor belt 6, A belt conveyor conveying device 5 comprising a conveyor belt bending device 1 for bending 6 in plan view,
The conveyor belt bending apparatus 1 is continuous with the tail side direction changing pulley 2 and the head side carrier line 7b, which form a tail side skew portion 7v continuous with the tail side carrier line 7a in the extra length portion 7c of the carrier line 7. A head side direction change pulley 22 that forms a head side skew portion 7vv, and a tail side skew portion 7v of the carrier line 7 and one twist pulley 3 that twists the head side skew portion 7vv. The extra length 8c of the return line 8 includes a tail side direction changing pulley 2 'that forms a tail side skew portion 8v continuous with the tail side return line 8a, and a head side skew portion 8vv continuous with the head side return line 8b. The head side direction changing pulley 22 ′ to be formed, the tail side skew portion 8v and the head side skew portion 8vv of the return line 8 are provided. Provided with one of the twisting pulley 3 'and to the rolling,
A tail side direction changing pulley 2 ′ provided in the return line 8 is disposed upstream of the tail side direction changing pulley 2 provided in the carrier line 7 in the conveying direction, and a head side direction changing pulley 22 provided in the return line 8. 'Is arranged on the downstream side in the transport direction from the head side direction changing pulley 22 provided in the carrier line 7,
The tail side direction changing pulleys 2, 2 ′ and the head side direction changing pulleys 22, 22 ′ are arranged at intervals in a direction crossing the axes at a bending angle θ in plan view,
The torsion pulleys 3 and 3 'are arranged in a posture in which the in-plane tension of the conveyor belt 6 is balanced in a vertical plane including an equal dividing line L whose axis line bisects the bending angle θ. Belt conveyor transport device.   The tail side direction changing pulley 2 for guiding the extra length portion 7c of the carrier line 7, the head side direction changing pulley 22, the tail side direction changing pulley 2 'for guiding the extra length portion 8c of the return line 8, The belt conveyor conveying device according to claim 1, wherein the axis of the head side direction changing pulley (22 ') includes an adjusting mechanism for adjusting an in-plane tension of the conveyor belt (6). The carrier line 7 of the conveyor belt 6 is provided with a tail side folding pulley 4 that folds the tail side carrier line 7a downstream of the tail side direction changing pulley 2 in the conveying direction and above the height direction, and on the head side. A head-side folding pulley 44 that folds the head-side carrier line 7b on the upstream side in the conveying direction and above the height direction with respect to the direction changing pulley 22 is disposed.
The tail side folding pulley 4 is disposed above the carrier line 7b located above the head side folding pulley 44 in the height direction and downstream of the head side folding pulley 44 in the transport direction. Item 3. The belt conveyor transport apparatus according to Item 1 or 2.