Conveyor

Abstract

To provide a conveying device capable of conveying materials to a predetermined position without providing a large-scale travel guide. [Solution] The transport device 1 includes a carriage 10 that can travel on rails (traveling rails 4) laid inside a tunnel 3, and material holding means 20 mounted on the carriage 10. The material holding means 20 is characterized by having an attachment 21 with a holding part 24 that holds the material 2, and a rotation mechanism 23 that rotates the attachment 21 around a rotation axis 26 that is parallel to the traveling direction of the carriage 10.

Description

[Technical Field]

[0001] The present invention relates to a conveying device. [Background technology]

[0002] A known example of a transport device that transports materials to a predetermined position within a tunnel is described in Patent Document 1. For example, Patent Document 1 discloses a transport device used when constructing a lining for a large-diameter tunnel using multiple parallel tunnels, for installing materials such as steel shells that will become part of the lining within each tunnel. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2023-156523 Summary of the Invention [Problem to be solved by the invention]

[0004] The conveying device described in Patent Document 1 can transport steel shell segments (materials) that form part of the lining of a large-section tunnel to a predetermined position while rotating them at a predetermined angle around an axis parallel to the direction of travel of the conveying device, but there was a problem in that four long platforms that serve as travel guides must be installed around the conveying device in accordance with the orientation of the materials, which required a lot of effort in advance.

[0005] From this viewpoint, an object of the present invention is to provide a conveying device that can convey materials to a predetermined position without providing a large-scale travel guide. [Means for solving the problem]

[0006] The present invention, which aims to solve the above-mentioned problems, provides a transport device comprising a carriage capable of running on rails laid inside a tunnel, and material holding means mounted on the carriage. The material holding means has an attachment with a holding part for holding materials, and a rotation mechanism for rotating the attachment around a rotation axis parallel to the traveling direction of the carriage. The rotation mechanism includes a rotation cylinder and a connecting bracket for connecting the rotation shaft and the rotation cylinder, the connecting bracket is attached radially to the rotation shaft so as to form a cross shape when viewed from the front, and the rotation cylinder is detachably connected to the tip of the connecting bracket. According to the conveying device of the present invention, the attachment that holds the materials can rotate around a rotation axis that is parallel to the direction of travel of the cart, so that the materials can be transported to a predetermined position without installing a large-scale traveling guide, and the materials can be attached to the installation location at any angle.

[0007] In the conveying device of the present invention, it is preferable that the material holding means further includes position adjustment means, which has at least one of a mechanism for sliding the attachment back and forth on the carriage, a mechanism for sliding the attachment left and right on the carriage, a mechanism for raising and lowering the attachment relative to the carriage, and a mechanism for tilting the rotation shaft of the attachment up and down. With this configuration, the attachment can slide back and forth and left and right on the carriage, as well as be raised and lowered, and the rotation shaft can be tilted up and down, making it possible to finely adjust the position of the material. In the conveying device of the present invention, the trolley is provided with wheels that roll on the rails and a lift-up prevention device that prevents the wheels from separating from the rails, and the lift-up prevention device preferably comprises a hanging portion that extends downward from the underside of the trolley and a roller provided at the lower end of the hanging portion, and the roller preferably abuts against the underside of the rails from below. [Effects of the Invention]

[0008] According to the conveying device of the present invention, materials can be conveyed to a predetermined position without providing a large-scale travel guide. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 2 is a side view showing the transport device according to the embodiment. [Figure 2] FIG. 2 is a plan view showing the transport device according to the embodiment. [Figure 3] FIG. 2 is a side view showing a material holding means of the transport device according to the embodiment. [Figure 4]FIG. 2 is a front view showing the transport device according to the embodiment. [Figure 5] FIG. 2 is a cross-sectional view taken along line BB in FIG. [Figure 6] 1A and 1B are side views showing the front of the conveying device, in which (a) is a side view showing the state in which the material holding means is tilted upward, (b) is a side view showing the state in which the material holding means is slid forward, and (c) is a side view showing the state in which the material holding means is slid upward. [Figure 7] FIG. 10 is a front view showing a state in which the attachment of the transport device is rotated. DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. The present invention is not limited to the illustrated examples. Note that the directions of front, back, up, down, left, and right in this embodiment refer to the direction when looking forward in the excavation direction from the transport device. In addition, in each drawing, common or similar components are given the same reference numerals, and redundant explanations thereof will be omitted.

[0011] The conveying device of this embodiment is used, for example, when constructing an outer shell lining from inside a small cross-section tunnel in a construction method in which small cross-section circular shield tunnels (outer shell shield tunnels) are stacked and integrated in a rosary-like pattern, a large cross-section lining (outer shell lining) is constructed, and then the internal soil is excavated to create a large space underground without excavation.

[0012] Fig. 1 is a side view of the conveying device, Fig. 2 is a plan view of the conveying device, Fig. 3 is a side view of the material holding means of the conveying device, and Fig. 4 is a front view of the conveying device (view taken along line AA in Fig. 1). As shown in Figs. 1 to 4, the conveying device 1 comprises a carriage 10 and material holding means 20.

[0013] The bogie 10 is a part that travels on rails 4 laid inside the tunnel 3. The bogie 10 has a plate-shaped bogie body 11. Wheels 12 that roll on the rails 4 are provided on the bottom of the bogie body 11. The wheels 12 are driven to rotate by drive motors 13 provided on the bottom of the bogie body 11. A pair of wheels 12 is arranged at the front, rear, left, and right of the bogie body 11, with a gap between them in the front and rear. A lift-up prevention device 14 is provided between the pair of wheels 12, 12. The lift-up prevention device 14 is a means for preventing the wheels 12 from separating from the rails 4. The lift-up prevention device 14 has a hanging portion that extends downward from the bottom surface of the bogie body 11, and a roller 15 provided at the bottom end of the hanging portion. The roller 15 abuts against the bottom surface of the rail 4 from below. The lift-up prevention device 14 counteracts the upward force acting on the carriage 10, preventing the carriage 10 from lifting up.

[0014] A material holding means 20 is installed at the front end of the cart body 11. A counterweight 17 and a battery 18 are loaded at the rear end of the cart body 11. By providing the counterweight 17 and the battery 18 at the rear end, the heavy material holding means 20 and material 2 are balanced front to rear. An operation panel 16 is installed between the counterweight 17 and the battery 18 and the material holding means 20. The operation panel 16 is a device that allows an operator to operate each part of the material holding means 20.

[0015] The material holding means 20 is a means for holding materials 2 such as steel plates for forming the outer shell casing, and can hold the materials 2 at various angles. The material holding means 20 is equipped with an attachment 21, an attachment support part 22, and a rotation mechanism 23.

[0016] The attachment 21 includes a holding portion 24 that holds the material 2, and a rotation shaft 26. The attachment 21 is rotatable about the rotation shaft 26. The holding unit 24 is configured with a base unit 25, an upper arm 27a, and a lower arm 27b. The base unit 25 supports the upper arm 27a and the lower arm 27b and includes a horizontal frame 25a and a vertical frame 25b. The horizontal frame 25a extends laterally at a height-direction intermediate portion of the vertical frame 25b and spans between the left and right vertical frames 25b. In other words, the horizontal frame 25a and the vertical frame 25b form an H-shape in a front view. Two horizontal frames 25a are arranged parallel to each other, one above the other. The horizontal frame 25a is configured to be extendable and retractable laterally. Specifically, the horizontal frame 25a includes an outer tube portion arranged at a center portion in the left-right direction (longitudinal direction) and an inner tube portion slidable relative to the outer tube portion. The left-right length of the horizontal frame 25a can be changed by sliding both inner tube portions relative to the outer tube portions and adjusting the insertion amount of the inner tube portions relative to the outer tube portions.

[0017] The vertical frames 25b are fixed to the left and right ends of the horizontal frames 25a at right angles to each other and extend vertically. An upper arm 27a is fixed to the upper end of the vertical frame 25b, and a lower arm 27b is fixed to the lower end. The vertical frames 25b are configured to be extendable and contractible vertically. Specifically, the vertical frames 25b include an outer cylindrical portion located in the middle in the vertical direction (longitudinal direction) and an inner cylindrical portion that is slidable relative to the outer cylindrical portion. The vertical length of the vertical frames 25b can be changed by sliding the inner cylindrical portions on both sides relative to the outer cylindrical portions and adjusting the insertion amount of the inner cylindrical portions relative to the outer cylindrical portions.

[0018] An arm left-right width adjustment cylinder 29 (hereinafter referred to as the "left-right width adjustment cylinder 29") is provided in parallel to the horizontal frame 25a. The left-right width adjustment cylinder 29 is a component for adjusting the distance (left-right width) between the upper arms 27a, 27a and the distance (left-right width) between the lower arms 27b, 27b. When the rod of the left-right width adjustment cylinder 29 is advanced or retreated, the horizontal frame 25a expands or contracts, thereby changing the distance between the vertical frames 25b. The left-right width adjustment cylinder 29 is arranged horizontally between the adjacent horizontal frames 25a, 25a, spaced apart vertically. The left-right width adjustment cylinder 29 is provided on the left and right sides of the longitudinal middle portion of the horizontal frame 25a. One end of the left-right width adjustment cylinder 29 is fixed to the outer cylindrical portion of the horizontal frame 25a via a bracket (not shown), and the other end is fixed to the inner cylindrical portion of the horizontal frame 25a. Here, since the outer cylindrical portion of the vertical frame 25b is fixed to the tip of the inner cylindrical portion of the horizontal frame 25a, when the left-right length of the horizontal frame 25a changes, the vertical frame 25b moves, and the distance (left-right width) between the upper arms 27a, 27a and the distance (left-right width) between the lower arms 27b, 27b are adjusted.

[0019] An arm vertical width adjustment cylinder 30 (hereinafter referred to as the "vertical width adjustment cylinder 30") is provided in parallel to the vertical frame 25b. The vertical width adjustment cylinder 30 is a component for adjusting the separation distance (vertical width) between the upper arm 27a and the lower arm 27b, and extends and retracts the vertical frame 25b. The vertical width adjustment cylinder 30 is disposed vertically behind each of the left and right vertical frames 25b. A pair of vertical width adjustment cylinders 30 is provided on each of the left and right vertical frames 25b, one above the other, and is disposed symmetrically above and below the center of the longitudinal middle of the vertical frame 25b. One end of the vertical width adjustment cylinder 30 is fixed to the outer cylindrical portion of the vertical frame 25b, and the other end is fixed to the inner cylindrical portion of the vertical frame 25b. In other words, as the vertical width adjustment cylinder 30 extends and retracts, the inner cylindrical portion of the vertical frame 25b slides relative to the outer cylindrical portion, changing the vertical length of the vertical frame 25b. This adjusts the separation distance (vertical width) between the upper arm 27a and the lower arm 27b.

[0020] The upper arm 27a is a part that presses down on the upper edge of the material 2, and protrudes forward from the upper end of the vertical frame 25b. The upper arm 27a is overlapped with a fixing bracket 2a that protrudes upward from the material 2, and is fixed to the material 2 by inserting a fixing pin through the upper arm 27a and the fixing bracket 2a.

[0021] The lower arm 27b is a part that holds down the lower edge of the material 2, and protrudes forward from the lower end of the vertical frame 25b. The lower arm 27b is overlapped with a fixing bracket 2a that protrudes downward from the material 2, and is fixed to the material 2 by inserting a fixing pin through the lower arm 27b and the fixing bracket 2a. The vertical positions of the upper arm 27a and the lower arm 27b are the directions in the initial state when no material 2 is being held, and depending on the rotation status of the attachment 21, the upper arm 27a may be on the lower side and the lower arm 27b may be on the upper side.

[0022] The pivot shaft 26 is a part that serves as the center of rotation when rotating the holding part 24. One end of the pivot shaft 26 is fixed to the center of gravity of the base part 25. The pivot shaft 26 is parallel to the direction of travel of the cart 10. The pivot shaft 26 extends rearward from the base part 25 and has a cylindrical shape. The pivot shaft 26 is rotatably supported by the attachment support part 22.

[0023] The attachment support section 22 supports the attachment 21 and moves the attachment 21 in various directions. As shown in FIG. 3 , the attachment support section 22 includes a first frame 31, a second frame 32, a third frame 33, and a position adjustment mechanism. The first frame 31, the second frame 32, and the third frame 33 are frames that are installed in this order from the bottom up. The position adjustment mechanism includes at least one of a mechanism for sliding the attachment 21 forward and backward on the carriage 10, a mechanism for sliding the attachment 21 left and right on the carriage 10, a mechanism for raising and lowering the attachment 21 relative to the carriage 10, and a mechanism for tilting the rotation shaft 26 up and down. In this embodiment, the attachment support section 22 includes all of the forward and backward sliding mechanism, left and right sliding mechanism, lifting mechanism, and tilting mechanism described above.

[0024] The first frame 31 is the lowest frame and is installed on the bogie 10. The first frame 31 has a rectangular shape in a plan view. Rollers 35 are rotatably mounted on the four corners of the first frame 31. The rollers 35 are arranged so that their rotation axes extend in the left-right direction and are rollable on guide rails installed on the bogie 10. The rollers 35 support the first frame 31 on the bogie 10 so that it can move in the front-rear direction. A front-rear movement cylinder 36 is provided inside the first frame 31. The front-rear movement cylinder 36 slides the first frame 31 back and forth and extends in the front-rear direction. A pair of front-rear movement cylinders 36 are provided laterally spaced apart and are respectively arranged inside the left and right elongated members extending in the front-rear direction of the first frame 31. One end of the front-rear movement cylinder 36 is fixed to a bracket attached to the bogie 10, and the other end is fixed to a bracket attached to the first frame 31. In other words, as the forward / backward movement cylinder 36 extends and retracts, the first frame 31 slides in the forward / backward direction relative to the carriage 10, moving the attachment support part 22 and the attachment 21 forward and backward. The maximum forward movement distance of the attachment 21 is 200 mm from the initial position. The above configuration constitutes the forward / backward sliding mechanism.

[0025] The second frame 32 is a frame installed on the first frame 31 and has a rectangular shape in a plan view. Rollers 37 are rotatably mounted on the four corners of the second frame 32. The rollers 37 are arranged so that their rotation axes extend in the front-rear direction and are rollable on guide rails 39 provided on the first frame 31. The rollers 37 support the second frame 32 on the first frame 31 so that it can move left and right. The second frame 32 is provided with a left-right movement cylinder 38. The left-right movement cylinder 38 slides the second frame 32 left and right and extends left and right. A pair of left-right movement cylinders 38 are provided at a distance from each other in the front and rear, and are respectively disposed inside the front and rear elongated members extending left and right of the second frame 32. One end of the left-right movement cylinder 38 is fixed to a bracket attached to the first frame 31, and the other end is fixed to a bracket attached to the second frame 32. In other words, as the left-right movement cylinder 38 extends and retracts, the second frame 32 slides left and right relative to the first frame 31, moving the portion of the attachment support part 22 above the second frame 32 and the attachment 21 left and right. The maximum left and right movement distance of the attachment 21 is ±100 mm from the initial position. The above configuration constitutes the left and right sliding mechanism.

[0026] The third frame 33 is a frame that is installed on the second frame 32. The third frame 33 has a box-like shape and includes an upper frame 40, a lower frame 41, and a vertical member 43. The upper frame 40 has a rectangular shape in a plan view and is located above the third frame 33. The front end of the upper frame 40 protrudes forward beyond the lower frame 41. A rotating cylinder 52 of the rotating mechanism 23 is attached to the long member that extends left and right at the forward protruding position. The configurations of the rotating mechanism 23 and the rotating cylinder 52 will be described later.

[0027] The lower frame 41 has a rectangular shape in a plan view and is located below the third frame 33. The vertical members 43 are pillar members that connect the upper frame 40 and the lower frame 41. Four vertical members 43 are provided, and are erected at the four corners of the lower frame 41. The upper end of the vertical member 43 located at the rear is connected to the corner of the rear end of the upper frame 40. The upper end of the vertical member 43 located at the front is connected to the lower surface of a long member that extends in the front-to-rear direction of the upper frame 40.

[0028] The rear end of the lower frame 41 is connected to a bracket attached to the rear end of the second frame 32 via a pin. The pivot pin 44 used for the pin connection extends in the left-right direction. The third frame 33 tilts around the pivot pin 44, allowing the front of the third frame 33 to move up and down. The third frame 33 is provided with a vertical tilt cylinder 45. The vertical tilt cylinder 45 rotates the third frame 33 and is located in front of the front vertical member 43 of the third frame 33. The upper end of the vertical tilt cylinder 45 is fixed to a bracket attached to the front of the vertical member 43, and the lower end is fixed to a bracket attached to the front of the second frame 32. In other words, as the vertical tilt cylinder 45 extends and retracts, the front of the third frame 33 moves up and down, causing the third frame 33 to rotate around the pivot pin 44. The maximum vertical tilt angle of the attachment 21 is ±2 degrees from the initial position. The above configuration constitutes the tilting mechanism.

[0029] A bearing 46 is provided at a central portion of the third frame 33 in the left-right direction and in the height direction. The bearing 46 rotatably supports the rotating shaft 26 and is provided at two locations, the front and rear of the third frame 33. The two bearings 46 rotatably support the rear end and front end of the rotating shaft 26, respectively. The bearing 46 is provided with a protruding portion 47 that protrudes in the left-right direction from the main body of the bearing 46. The tip of the protruding portion 47 extends to the side of the vertical member 43. The third frame 33 is provided with a vertical movement cylinder 48. The vertical movement cylinder 48 moves the bearings 46 up and down to raise and lower the attachment 21. Four vertical movement cylinders 48 are provided, and each extends in the vertical direction along the four vertical members 43 of the third frame 33. The lower end of the vertical movement cylinder 48 is fixed to the tip of the overhanging portion 47, and the upper end is fixed to a bracket attached to the upper frame 40. As the vertical movement cylinder 48 extends and retracts, the attachment 21 and the rotating shaft 26 rise and fall together with the bearing portions 46, 46. The maximum vertical movement distance of the attachment 21 is ±100 mm from the initial position. The above configuration constitutes the lifting mechanism.

[0030] The rotation mechanism 23 is a mechanism that rotates the attachment 21 around the rotation shaft 26. As shown in FIG. 5 , the rotation mechanism 23 includes a connecting bracket 51 and a rotating cylinder 52. The connecting bracket 51 is a bracket for connecting the rotation shaft 26 and the rotating cylinder 52. The connecting bracket 51 is attached to the rotation shaft 26 in front of the front bearing portion 46, and rotates together with the rotation shaft 26. The connecting bracket 51 extends radially from the rotation shaft 26. Four connecting brackets 51 are provided, and are arranged in a cross shape when viewed from the front. The rotating cylinder 52 is detachably connected to the tip of the connecting bracket 51.

[0031] The rotating cylinder 52 is a component for rotating the rotating shaft 26 and is attached to a portion of the upper frame 40 that protrudes forward from a long member extending in the front-rear direction. The rotating cylinder 52 extends in the up-down direction. Two rotating cylinders 52 are provided, and are arranged above the rotating shaft 26, on both the left and right sides of the rotating shaft 26. The upper ends of the rotating cylinders 52 are connected to a bracket attached to the upper frame 40 via a pin. The pin used for the pin connection extends in the front-rear direction, allowing the lower ends of the rotating cylinders 52 to tilt left and right. The lower end of one rotating cylinder 52 is connected to the tip of one connecting bracket 51 via a pin, and the lower end of the other rotating cylinder 52 is connected to the tip of another connecting bracket 51 that is arranged in a straight line with the first connecting bracket 51 via a pin. When one rotating cylinder 52 is extended, the other rotating cylinder 52 is retracted. When one rotating cylinder 52 is retracted, the other rotating cylinder 52 is extended. The rotation angle of the rotation shaft 26 due to the extension and contraction of the rotation cylinders 52 is 90 degrees. The lower ends of the rotation cylinders 52 are detachably attached to the tips of the connecting brackets 51, and by switching the connecting brackets 51 to which the lower ends of the rotation cylinders 52 are attached, the rotation shaft 26 can rotate within a range of ±90 degrees. As shown in FIG. 5 , with the right rotation cylinder 52 extended and the left rotation cylinder 52 retracted, the lower ends of the rotation cylinders 52 are separated from the tips of the connecting brackets 51. Then, the right rotation cylinder 52 is retracted and attached to the tip of the connecting bracket 51 that protrudes diagonally to the upper right, and the left rotation cylinder 52 is extended and attached to the tip of the connecting bracket 51 that protrudes diagonally to the lower left. Thereafter, the right rotation cylinder 52 is extended and the left rotation cylinder 52 is retracted, thereby rotating the rotation cylinders 52 an additional 90 degrees. As a result, the material 2 (see Figure 5), which was in a horizontal position, can be rotated to a vertical position as shown in Figure 7. By appropriately performing the above procedure, the rotation shaft 26 can be rotated left and right within a range of ±90 degrees. Furthermore, by appropriately setting the extension and contraction amount of each rotation cylinder 52, the material 2 can be tilted to a desired angle.

[0032] Fig. 6 is a side view showing the front of the conveying device, (a) is a side view showing the state in which the material holding means is tilted upward, (b) is a side view showing the state in which the material holding means is slid forward, and (c) is a side view showing the state in which the material holding means is slid upward. Fig. 7 is a front view showing the state in which the attachment of the conveying device is rotated. Next, with reference to FIGS. 6 and 7, the state in which the attachment 21 is moved in various directions will be described.

[0033] When tilting the attachment 21 upward using the tilting mechanism, as shown in Figure 6(a), the material 2 is held by the attachment 21 and the up-down tilting cylinder 45 spanning between the second frame 32 and the third frame 33 is extended. This causes the front of the third frame 33 to rise, and the third frame 33 rotates upward around the rotation pin 44. This allows the tilt angle of the material 2 to be adjusted as needed.

[0034] When moving the attachment 21 forward using the forward / backward sliding mechanism, as shown in FIG. 6(b), the forward / backward moving cylinder 36 spanning between the carriage 10 and the first frame 31 is extended while the material 2 is held by the attachment 21. This causes the attachment support part 22 and the attachment 21 to move forward relative to the carriage 10. This allows the forward / backward position of the material 2 to be adjusted as appropriate.

[0035] When the lifting mechanism is used to move the attachment 21 upward, as shown in Figure 6(c), the vertical movement cylinder 48 suspended between the bearings 46, 46 of the third frame 33 and the upper frame 40 is extended while the material 2 is held by the attachment 21. This causes the bearings 46, 46 to rise, and the rotating shaft 26 and the attachment 21 to rise. This allows the height position of the material 2 to be adjusted as needed.

[0036] To rotate the attachment 21 using the rotation mechanism 23, the left and right rotation cylinders 52, 52 are extended and retracted (see Figure 5). This causes the attachment 21 and the material 2 to rotate around the rotation axis 26, allowing the material 2 to be tilted at a desired angle. As shown in Figure 7, by tilting the material 2 vertically, the side of a large-section lining body (outer shell lining body) can be constructed. Here, the rotation angle of the attachment 21 can be set within a range of ±90 degrees left and right, so the material 2 can be tilted at any angle, making it easy to construct a large-section lining body (outer shell lining body) in any location.

[0037] As described above, according to the conveying device 1 of this embodiment, the attachment 21 that holds the materials 2 can rotate around the rotation axis 26 that is parallel to the traveling direction of the cart 10, so the materials 2 can be transported to a predetermined position and can be attached to the installation location at any angle. Furthermore, when fixing the materials 2 from the stacking position, the rotation angle of the attachment 21 can be freely adjusted according to the installation angle of the materials 2.

[0038] Furthermore, the attachment 21 can slide back and forth and left and right on the cart 10, and can also be raised and lowered, and the rotation axis can tilt up and down, so that even after the cart 10 is fixed, the position of the material 2 can be finely adjusted.

[0039] Furthermore, according to the conveying device 1 of this embodiment, the entire process from transporting the material 2 to setting up and adjusting its position can be performed with a single conveying device 1, making construction easier. Also, since it is not necessary to install multiple pieces of equipment such as teraherons and erectors, it is easier to secure construction space. Furthermore, since the as-built standard can be measured from any desired location without being obstructed by construction equipment, it is possible to improve work efficiency and eliminate the risk of deviation from the as-built standard. Furthermore, since the conveying device 1 is relatively small, it is easier to secure construction space inside the tunnel 3.

[0040] Although the above describes an embodiment of the present invention, the present invention is not limited to the above embodiment and can be modified as appropriate without departing from the spirit of the present invention. In the above embodiment, the attachment support part 22 is equipped with four mechanisms as position adjustment means: a forward / backward sliding mechanism, a left / right sliding mechanism, a lifting mechanism, and a tilting mechanism, but the present invention is not limited to these. It is sufficient to omit some of the mechanisms and provide at least one of the mechanisms. However, providing all of the mechanisms, as in the present embodiment, is preferable because it allows for more precise position adjustment of the attachment 21 and the material 2. [Explanation of symbols]

[0041] 1. Conveyor device 2. Materials 3. Tunnel 4 Running rails (rails) 10 carts 20 Material Retention Means 21 Attachment 23 Rotating mechanism 24 Holding part 26 Rotating shaft 36 Forward / backward moving cylinder (position adjustment means) 38 Left and right moving cylinder (position adjustment means) 45 Up / down tilt cylinder (position adjustment means) 48 Up and down moving cylinder (position adjustment means) 52 Rotating cylinder

Claims

1. A cart that can run on rails laid inside the tunnel, A conveying device comprising a material holding means mounted on the carriage, the material holding means includes an attachment having a holding portion for holding the material, and a rotation mechanism for rotating the attachment about a rotation axis parallel to the traveling direction of the carriage, the rotation mechanism includes a rotation cylinder and a connecting bracket for connecting the rotation shaft and the rotation cylinder; the connecting brackets are attached to the pivot shafts in a radial pattern so as to form a cross shape when viewed from the front, The rotating cylinder is detachably connected to the tip of the connecting bracket. A conveying device characterized by:

2. The material holding means further includes a position adjusting means, The position adjustment means has at least one of a mechanism for sliding the attachment back and forth on the carriage, a mechanism for sliding the attachment left and right on the carriage, a mechanism for raising and lowering the attachment relative to the carriage, and a mechanism for tilting the rotation shaft of the attachment up and down.

2. The conveying device according to claim 1.

3. The carriage is provided with wheels that roll on the rails and a lift-up prevention device that prevents the wheels from separating from the rails, the lift-up prevention device includes a hanging portion that extends downward from the underside of the carriage, and a roller provided at a lower end of the hanging portion, The rollers are in contact with the lower surface of the rail from below.

3. The conveying device according to claim 1 or 2.

Images