Conveyance device

Abstract

To provide a conveyance device capable of conveying a flexible long-sized object from a conveyance origin to a conveyance destination which is further downward than the conveyance origin.SOLUTION: A conveyance device includes: a conveyance base which has a long hole provided in a curve shape from the direction of a conveyance origin to the direction of a conveyance destination; and a holding tool which has an insertion part inserted in the long hole, and a holding part for holding part of a long-sized object, and which moves along the long hole while the insertion part is inserted in the long hole in a state of holding part of the long-sized object.SELECTED DRAWING: Figure 18

Description

[Technical Field]

[0001] The present invention relates to a technique for transporting long objects. [Background technology]

[0002] In some nuclear power plants, spring water removal equipment 1, as shown in Figure 1, is installed below the building foundations to remove spring water. The spring water removal equipment 1 includes an underdrain collection and drainage material 2 (shown by dotted lines in Figure 1) and a collection pipe 3 (shown by solid lines in Figure 1) connected to it. The underdrain collection and drainage material 2 is, for example, a three-dimensional mesh molded product (sometimes called a "plastic three-dimensional mesh molded product" or "Loofah (registered trademark)") made by extruding polypropylene resin into fibers with a diameter of approximately 2 mm. The underdrain collection and drainage material 2 is covered with a permeable sheet 6 (see Figure 2) made of nonwoven fabric or other material to prevent clogging with fine stones and sand in the soil. The spring water removal equipment 1 is installed underground, and the underdrain collection and drainage material 2 collects underground spring water and funnels it into the collection pipe 3. The water then flows through the collection pipe 3 to a drainage pit, where it is collected and discharged outside the spring water removal equipment 1 by a drainage pump in the drainage pit.

[0003] The soundness of the seepage water removal equipment 1 is essential for the safe operation of a nuclear power plant equipped with the equipment. For this reason, inspection equipment must be inserted into the water collection pipe 3 through a vertical hole 4 dug to the depth of the equipment 1. However, at the connection 5 of the underdrain collection material 2 in the water collection pipe 3, as shown in Figure 2, the end of the underdrain collection material 2 protrudes into the water collection pipe 3, obstructing the passage of the inspection equipment and hindering the inspection.

[0004] Therefore, like an endoscope, it is necessary to insert a cable into the inside of the water collection pipe 3 from the tip side and use a cutting drill bit attached to the tip to cut out obstacles such as the underdrain drainage material 2. However, it requires a great deal of effort to transport a long cable from the ground to the opening of the water collection pipe 3, which is located deep in the spring water removal equipment 1, and then insert it into the inside of the water collection pipe 3.

[0005] Under such circumstances, Patent Document 1 discloses a conveying device capable of conveying a flexible, long object while suppressing bending due to gravity. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Patent Publication No. 2021-151311 Summary of the Invention [Problem to be solved by the invention]

[0007] However, the conveying device of Patent Document 1 has the problem that although it can transport long, flexible objects horizontally, it cannot transport them in directions at different heights, such as from the ground to the opening of a water collection pipe 3 below where spring water removal equipment 1 is located.

[0008] In view of the above circumstances, an object of the present invention is to provide a conveying device capable of conveying a flexible, long object from an origin to a destination located below the origin. [Means for solving the problem]

[0009] The present invention has been made to achieve the above object and has the following features.

[0010] The invention described in claim 1 is a conveying device that conveys flexible, long objects along their longitudinal direction from a source to a destination located below the source, and is characterized by comprising: a conveying base having a long hole curved from the source direction to the destination direction; an insertion portion that is inserted into the long hole; and a holding portion that holds a portion of the long object, and a holding device that moves along the long hole while holding a portion of the long object with the insertion portion inserted into the long hole.

[0011] The invention described in claim 2 is a conveying device described in claim 1, characterized in that it further comprises a restraining means that does not restrain the movement of the long object when the movement direction of the long object is the forward direction from the direction of the source of the conveyance to the direction of the destination of the conveyance, and that restrains the movement of the long object when the movement direction is the opposite direction to the forward direction.

[0012] The invention described in claim 3 is the conveying device described in claim 2, wherein the restraining means comprises a first abutment portion that abuts the long object from one of the directions perpendicular to the movement direction, and a second abutment portion that abuts the long object from the direction opposite to the one direction, and the first abutment portion and the second abutment portion clamp and lock the long object when the movement direction is the opposite direction.

[0013] The invention described in claim 4 is the conveying device described in claim 3, characterized in that the second abutment portion is rotatably arranged along the movement direction, rotation in the opposite direction is restricted, and the long object is clamped and locked between the second abutment portion and the first abutment portion.

[0014] The invention described in claim 5 is a conveying device described in claim 1, characterized in that the conveying base is provided with a guide that guides a second long object that moves together with the long object from the direction of the source of the conveyance to the direction of the destination of the conveyance. [Effects of the Invention]

[0015] According to this invention, the holder holds a portion of the flexible, elongated object and moves along a curved elongated hole from the source direction to the destination direction, thereby enabling the flexible, elongated object to be transported from the source direction to the destination direction which is below the source direction. [Brief explanation of the drawings]

[0016] [Figure 1] FIG. 1 is a schematic plan view of the spring water removal equipment 1. [Figure 2] FIG. 2 is a schematic cross-sectional view of a water collection pipe 3. [Figure 3]1 is a schematic diagram of a cutting device 10. FIG. [Figure 4] FIG. 2 is a perspective view of the cutting blade 20 from above. [Figure 5] FIG. 2 is a perspective view of the cutting blade 20 from below. [Figure 6] FIG. 2 is a front view of the cutting blade 20. [Figure 7] FIG. 2 is a rear view of the cutting blade 20. [Figure 8] FIG. 2 is a left side view of the cutting blade 20. [Figure 9] FIG. 2 is a right side view of the cutting blade 20. [Figure 10] 2 is a cross-sectional view of the cutting blade 20 taken along the line AA. [Figure 11] 1A is a perspective view of a first main body portion 31a of an elliptical frictional resistance reducing member 30A, FIG. 1B is a plan view of the same, and FIG. 1C is a cross-sectional view of FIG. 1B taken along the line BB. [Figure 12] 1A is a perspective view of the second main body portion 31b of the elliptical frictional resistance reducing member 30A, FIG. 1B is a plan view of the same, and FIG. 1C is a cross-sectional view taken along CC line of FIG. 1B. [Figure 13] 1A is a transparent perspective view of a first main body portion 51a of an elliptical frictional resistance reducing member 30B, FIG. 1B is a plan view of the same, and FIG. 1C is a DD cross-sectional view of FIG. [Figure 14] 1A is a transparent perspective view of the second main body portion 51b of the elliptical frictional resistance reducing member 30B, FIG. 1B is a plan view of the same, and FIG. 1C is an E-E cross-sectional view of FIG. [Figure 15] 1A is a perspective view of the first main body portion 41a of the annular frictional resistance reducing member 40, FIG. 1B is a side view of the same, FIG. 1C is a plan view of the same, and FIG. 1D is a cross-sectional view taken along the line CC of FIG. [Figure 16] 1A is a side view of the second main body portion 41b of the annular frictional resistance reducing member 40, FIG. 1B is a plan view of the same, and FIG. 1C is an E-E cross-sectional view of FIG. [Figure 17] 1A and 1B are diagrams showing an example of a state in which the pushing device 100 is used. [Figure 18] FIG. 1 is a perspective view showing a pushing device 100. [Figure 19] FIG. 2 is a side view showing the pushing device 100. [Figure 20] FIG. 2 is a plan view showing the pushing device 100. [Figure 21] FIG. 2 is a front view showing the pushing device 100. [Figure 22] 1A is a diagram showing the slide handle 110 in an open state, and FIG. 1B is a diagram showing the slide handle 110 in a closed state. [Figure 23] (A) is an oblique view showing the return prevention mechanism 140, (B) is a side view of the upper pressing portion 143, (C) is a side view showing the operation of the return prevention mechanism 140 when the push rod 16 slides forward, and (D) is a side view showing the operation of the return prevention mechanism 140 when the push rod 16 slides backward. [Figure 24] 10A is a perspective view showing a modified example of a return prevention mechanism 140, FIG. 10B is a side view of an upper pressing portion 143 of the modified example, and FIG. 10C is a side view of the modified example of a return prevention mechanism 140. DETAILED DESCRIPTION OF THE INVENTION

[0017] An embodiment of the present invention will be described with reference to the drawings. In this embodiment, a cutting device 10 that cuts an underdrain drainage material 2 covered with a water-permeable sheet 6 inside a water collection pipe 3 will be described.

[0018] As shown in FIG. 3, the cutting device 10 of this embodiment includes a control device 11, a cable 12, and a mechanical unit M. The mechanical unit M includes a front packer 13A, a middle packer 13B, a rear packer 13C (the front packer 13A, the middle packer 13B, and the rear packer 13C may be collectively referred to as packers 13), a rotation mechanism 14, and an arm mechanism 15. A cutting blade 20 shown in FIGS. 4 to 10 is attached to the rotation mechanism 14. The cutting device 10 may be, for example, a modified version of the MICROpremium by IMS robotics. Elliptical frictional resistance reduction members 30A and 30B are attached to the cable 12 and a push rod 16 (described later), and an annular frictional resistance reduction member 40 is attached to a portion of the packer 13.

[0019] The control device 11 includes a control unit 11a, an operation unit 11b, and a display unit 11c. The control unit 11a includes a CPU, a ROM in which a control program for controlling the cutting device 10 and the like is pre-stored, and a RAM for temporarily storing various data. The operation unit 11b includes a joystick and a keyboard, accepts operations by the operator, and transmits operation data indicating the operation content to the control unit 11a. The control unit 11a determines which operation has been performed based on the operation data and executes control for operating the cutting device 10 according to the operation content. The display unit 11c displays information indicating the status of the cutting device 10, information for operating the cutting device 10, images captured by a camera (described later), and the like.

[0020] The front packer 13A and the rear packer 13C are inflated by air supplied from a compressor (not shown), thereby adhering to the inner surface of the water collection pipe 3 and fixing themselves in place. The middle packer 13B expands and contracts in the axial direction (front-to-back direction) by air supplied from a compressor (not shown). The cable 12 and mechanical part M move back and forth within the water collection pipe 3 due to peristaltic motion, which combines the fixing of the front packer 13A or the rear packer 13C with the expansion and contraction of the middle packer 13B. The cable 12 passes through the packer 13.

[0021] The rotation mechanism 14 is provided at the tip of the machine part M and has an attachment part for attaching a cutting blade 20 described later. Under the control of the control part 11a, the rotation mechanism 14 rotates the cutting blade 20 to cut the underdrain drainage material 2 covered with the permeable sheet 6.

[0022] The arm mechanism 15 is provided between the front packer 13A and the rotation mechanism 14 and changes the position and orientation of the rotation mechanism 14 using the force of an air cylinder or a motor (not shown). For example, a mechanism for directing the rotation mechanism 14 upward may include a spring that bends the rotation mechanism 14 upward and an air cylinder that straightens the bent portion, and a mechanism in which the bent portion is straightened by supplying air to the air cylinder and the bent portion is bent by the force of the spring by stopping the supply of air to the air cylinder. The arm mechanism 15 is also provided with a camera (not shown), which captures images of the cutting blade 20 cutting the workpiece and transmits video data to the control device 11. Based on the video data, the cutting of the workpiece is displayed in real time on the display unit 11c, allowing the operator to perform operations while viewing this video data.

[0023] Here, the cutting blade 20 will be described using Figures 4 to 10. The cutting blade 20 has a cylindrical shape and is made of metal (for example, S45C, carbon steel for mechanical structures). The cylindrical shape allows water resistance to escape even underwater, and the rotation speed of the cutting blade 20 is less likely to decrease, making it possible to cut underwater. Furthermore, by applying a specified coating to the cutting blade 20 after heat treatment, the cutting ability does not deteriorate even when cutting the underdrain collection material 2, and the blade has durability that allows continuous cutting.

[0024] At one end in the axial direction of the cutting blade 20 (the upper end in FIG. 6, etc.), a wave-shaped blade portion 22 is formed when viewed from the side, and the wave-shaped blade portion 22 has convex curved portions 22a and concave curved portions 22b that are alternately continuous. The blade portion 22 has a sharp shape at least on the inside or outside of the cutting blade 20, and is shaped so that the blade portion 22 of the rotating cutting blade 20 can cut the underdrain collection material 2 and the permeable sheet 6.

[0025] A protrusion 23 made of metal (for example, cemented carbide (JIS symbol: HW)) is provided on the outside of the side surface 21 of the cutting blade 20. This allows the underdrain drainage material 2 to be cut not only by the cutting edge 22 at the tip but also by the protrusion 23 on the side surface, thereby shortening the cutting time.

[0026] A discharge hole 24 is formed in the side portion 21 of the cutting blade 20, and the cut underdrain drainage material 2 and permeable sheet 6 are discharged from the discharge hole 24 to the outside of the cutting blade 20. This prevents the cut material from clogging the inside of the cutting blade 20, and allows continuous cutting. The edge of the discharge hole 24 also has a sharp shape facing inward or outward (i.e., a blade portion 24a is formed on the edge of the discharge hole 24), making it possible to cut and remove foreign matter clinging to the cutting blade 20.

[0027] Multiple blade portions 25 are also formed at the other axial end (lower in Figure 6, etc.) of the cutting blade 20, and the blade portions 25 have a sharp shape facing inward, so that when the mechanical part M is pulled back from inside the water collection pipe 3, foreign matter clinging to the cutting blade 20 can be cut and removed.

[0028] 3, the cable 12 is made up of a plurality of cables bundled together. For example, the cable 12 includes a rotation drive cable for the rotation mechanism 14, air piping for inflating the front packer 13A, the middle packer 13B, and the rear packer 13C, air piping for the arm mechanism 15, a signal cable for the camera, etc.

[0029] The cable 12 advances inside the water collection pipe 3 together with the mechanical part M while making contact with the underside inside the water collection pipe 3. Note that the mechanical part M and the cable 12 can be pushed not only by the peristaltic movement of the packer 13 but also by hand if the pipe is straight, but when turning or after passing through a curved section, the cable 12 buckles and cannot be pushed in by hand alone, so the cable 12 is pushed by a pushing device 100, which will be described later, to move deeper into the water collection pipe 3. Specifically, the mechanical part M and the cable 12 are inserted into the opening of the water collection pipe 3 that was created by removing a portion of the water collection pipe 3 in the vertical hole 4, and the push rod 16 prepared for pushing the cable 12 is pushed together with the cable 12 by the pushing device 100.

[0030] When mechanical part M and cable 12 move inside the water collection pipe 3, frictional resistance occurs between mechanical part M and cable 12 and the inner surface of the water collection pipe 3. Since this frictional resistance increases particularly after passing through a bend in the water collection pipe 3, there is a limit to the distance that mechanical part M and cable 12 can be moved. Therefore, by attaching an annular frictional resistance reduction member 40 to mechanical part M and elliptical frictional resistance reduction members 30A and 30B to cable 12, the movement distance can be extended.

[0031] Next, the elliptical frictional resistance reducing member 30A will be described with reference to Figures 11 and 12. The elliptical frictional resistance reducing member 30A has an ellipsoid shape, and is divided into two halves to form a first main body portion 3. The first body portion 31a has a first main body portion 31a (see FIG. 11) and a second main body portion 31b (see FIG. 12). As shown in FIGS. 11(A) to 11(C), a large groove 32a and a small groove 33a having a semicircular cross section are formed on a joining surface 37a of the first body portion 31a that joins with the second body portion 31b. Furthermore, bolt holes 35a, 36a, and a tapped hole 34a are formed in a direction perpendicular to the large groove 32a and the small groove 33a. Similarly, as shown in FIGS. 12(A) to 12(C), the second body portion 31b has a large groove 32b and a small groove 33b having a semicircular cross section formed on a joining surface 37b that joins with the first body portion 31a. Furthermore, bolt holes 35b, 36b, and a tapped hole 34b are formed in a direction perpendicular to the large groove 32b and the small groove 33b. The tapped holes 34a and 34b are tapped for set screws. Additionally, the bolt holes 35b and 36b are tapped for fastening bolts.

[0032] To attach the elliptical frictional resistance reduction member 30A to the cable 12 and the push rod 16, the cable 12 is sandwiched between the large grooves 32a and 32b, and the push rod 16 is sandwiched between the small grooves 33a and 33b. Next, the mating surfaces 37a and 37b are aligned, and then mating bolts are inserted into the bolt holes 35a and 36a, respectively, and fixed into the tapped bolt holes 35b and 36b. Furthermore, set screws are threaded into the tapped holes 34a and 34b, respectively, and the tips of the set screws are brought into contact with the push rod 16. This completes the attachment of the elliptical frictional resistance reduction member 30A to the cable 12 and the push rod 16.

[0033] Next, the elliptical frictional resistance reduction member 30B will be described using FIGS. 13 and 14. The elliptical frictional resistance reduction member 30B has an ellipsoidal shape and is divided into a first main body portion 51a (see FIG. 13) and a second main body portion 51b (see FIG. 14). As shown in FIGS. 13(A) to 13(C), the first main body portion 51a has a joining surface 57a that joins with the second main body portion 51b, and is formed with a large groove 52a, a medium groove 58a, and a small groove 53a, each having a semicircular cross section. Furthermore, bolt holes 55a, 56a, and a tapped hole 54a are formed in a direction perpendicular to the large groove 52a, the medium groove 58a, and the small groove 53a. Similarly, as shown in FIGS. 14(A) to 14(C), the second main body portion 51b has a joining surface 57b that joins with the first main body portion 51a, and is formed with a large groove 52b, a medium groove 58b, and a small groove 53b, each having a semicircular cross section. In addition, bolt holes 55b, 56b and tapped hole 54b are formed in a direction perpendicular to large groove 52b, medium groove 58b and small groove 53b. Tapped holes 54a and 54b are tapped for set screws. Bolt holes 55b, 56b are tapped for fastening bolts.

[0034] The elliptical frictional resistance reduction member 30B is attached to the camera signal cable, cable 12 (excluding the camera signal cable), and push rod 16. To attach the elliptical frictional resistance reduction member 30B, the cable 12 is sandwiched between the large grooves 52a and 52b, the push rod 16 is sandwiched between the medium grooves 58a and 58b, and the camera signal cable is sandwiched between the small grooves 53a and 53b. Next, the mating surfaces 57a and 57b are aligned, and fastening bolts are inserted into the bolt holes 55a and 56a, respectively, and fixed into the tapped bolt holes 55b and 56b. Set screws are threaded into the tapped holes 54a and 54b, respectively, and the tips of the set screws are abutted against the push rod 16. This completes the attachment of the elliptical frictional resistance reduction member 30B to the camera signal cable, cable 12 (excluding the camera signal cable), and push rod 16.

[0035] Next, the annular frictional resistance reduction member 40 will be described with reference to FIGS. 15 and 16. The annular frictional resistance reduction member 40 is annular and has a first main body portion 41a (see FIG. 15) and a second main body portion 41b (see FIG. 16) that are split in half. As shown in FIGS. 15(A)-(D), the first main body portion 41a is formed with bolt holes 42a and 44a and a tapped hole 43a. Similarly, as shown in FIGS. 16(A)-(C), the second main body portion 41b is formed with bolt holes 42b and 44b and a tapped hole 43b. The tapped holes 43a and 43b are tapped for set screws. The bolt holes 42a and 44a are tapped for fastening bolts.

[0036] To attach the annular frictional resistance reduction member 40 to the cylindrical portion of the mechanical portion M, the cylindrical portion is sandwiched between the inner diameter portion 45a of the first main body portion 41a and the inner diameter portion 45b of the second main body portion 41b. Next, the joining surfaces 46a and 46b are aligned, and then joining bolts are inserted into the bolt holes 42b and 44b, respectively, and fixed into the tapped bolt holes 42a and 44a. Furthermore, set screws are threaded into the tapped holes 43a and 43b, respectively, and the tips of the set screws are brought into contact with the cylindrical portion. This attaches the annular frictional resistance reduction member 40 to the cylindrical portion of the mechanical portion M.

[0037] As described above, the cutting device 10 of this embodiment is a cutting device that cuts the culvert drainage material 2 covered with the permeable sheet 6 inside the water collection pipe 3 by rotating the cylindrical cutting blade 20, and one end of the cutting blade 20 is formed with a wavy blade portion 22 when viewed from the side, and the wavy blade portion 22 has a series of alternating convex curved portions 22a and concave curved portions 22b.

[0038] Therefore, according to the cutting device 10 of this embodiment, the cylindrical cutting blade 20 having the wave-shaped blade portion 22 in which convex curved portions 22a and concave curved portions 22b are alternately continuous rotates, thereby making it possible to cut the underdrain collection material 2 covered with the permeable sheet 6 inside the water collection pipe 3 without the permeable sheet 6 becoming entangled. Furthermore, because the cutting blade 20 is cylindrical, it is possible to cut the permeable sheet 6 and the underdrain collection material 2 without encountering water resistance even when water is present inside the water collection pipe 3.

[0039] In addition, protrusions 23 are formed on the outer side surfaces of the cutting blade 20. This allows the underdrain drainage material 2 to be cut not only by the cutting edge 22 at the tip but also by the protrusions 23 on the side surfaces, thereby shortening the cutting time.

[0040] Furthermore, a discharge hole 24 is formed on the side of the cutting blade 20 to discharge the cut underdrain drainage material 2 to the outside of the cutting blade 20. This prevents the cut material from clogging the inside of the cutting blade 20, and allows continuous cutting.

[0041] Furthermore, a blade portion 24a is formed on the edge of the discharge hole 24. This allows the blade portion 24a to cut and remove foreign matter clinging to the cutting blade 20.

[0042] Furthermore, elliptical friction resistance reducing members 30A and 30B are attached to part of the outer periphery of the cable 12 to reduce the friction resistance between the cable 12 and the inner surface of the water collection pipe 3 when the cable 12 moves inside the water collection pipe 3. This reduces the friction resistance between the mechanical part M and the cable 12 and the inner surface of the water collection pipe 3, allowing the moving distance to be extended.

[0043] In this embodiment, the case where the object to be cut is the underdrain drainage material 2 covered with the water-permeable sheet 6 has been described, but the object to be cut by the cutting device 10 is not limited to the object to be cut that is covered with a cloth-like covering such as the water-permeable sheet 6, and the cutting device 10 can also cut an object to be cut that is not covered with a cloth-like covering.

[0044] Next, the pushing device 100 will be described with reference to FIGS. 17 to 23. The pushing device 100 is installed at the bottom of the vertical hole 4 and is used to push a cable 12 extending from a control device 11 located at a predetermined position on the ground (near the vertical hole 4) and a push rod 16 into the water collection pipe 3. As shown in FIG. 17, the pushing device 100 has a curved slide hole 102 formed in a slide base 101. The push rod 16 is pushed toward the opening of the water collection pipe 3 by sliding the slide handle 110 through the slide hole 102 from the ground side toward the water collection pipe 3 while holding a portion of the push rod 16. An entrance roller 108A is provided on the upstream side of the slide hole 102, and the entrance roller 108A guides the push rod 16 to move along the slide hole 102. An exit roller 108B is provided on the downstream side of the slide hole 102, and the exit roller 108B guides the push rod 16 toward the opening of the water collection pipe 3. In addition, a plurality of cable guide rollers 107 for guiding the cable 12 from the ground side to the water collection pipe 3 side are provided below the slide base 101.

[0045] With the slide handle 110 holding the push rod 16, the worker slides the slide handle 110 along the slide hole 102 to transport the push rod 16 and the cable 12 from the ground side to the water collection pipe 3 side. Note that although two slide handles 110 are shown in Figure 17, the number of slide handles 110 may be one, or three or more may be provided when the sliding distance is long.

[0046] Next, the configuration of the pushing device 100 will be described with reference to Figures 18 to 21. Note that Figures 18 and subsequent figures will describe a case where a return prevention mechanism 140 that prevents the push rod 16 from returning in reverse is provided instead of the outlet roller 108B.

[0047] The slide base 101 has a slide hole 102 formed in a curved shape in a side view from the direction of a predetermined position where the control device 11 above is disposed toward the opening of the water collection pipe 3. The slide base 101 is fixed via horizontal members 106 and the like to a plurality of telescopic struts 104 that stand on a base 103 that is arranged in a lattice shape in a plan view. The height of the slide base 101 can be adjusted by the telescopic struts 104. The horizontal members 106 are fixed to the plurality of telescopic struts 104.

[0048] The cable guide roller 107 has two rollers, and the cable 12 passes between the rollers. Furthermore, the inlet roller 108A has two rollers, and the push rod 16 passes between the rollers. These rollers allow the worker to smoothly push the cable 12 and the push rod 16 into the water collection pipe 3 with less force than if the pushing device 100 were not used.

[0049] Next, the configuration of the slide handle 110 will be described with reference to Figure 22. The slide handle 110 has a base 112 and a wall portion 115 fixed perpendicular to the base 112. A lower handle 111, which is gripped by an operator, is fixed to the side of the base 112. Bolts 113 are erected near both ends of the upper surface of the base 112, spaced apart from the wall portion 115 by a distance that allows the push rod 16 to be inserted therethrough. Further, a retaining plate 114 is fixed horizontally to each bolt 113 at a position spaced apart from the base 112. Then, as indicated by arrow Y, the push rod 16 is inserted into the left and right gaps surrounded by the base 112, the wall portion 115, the bolt 113, and the retaining plate 114.

[0050] A locking portion 121 is fixed to a notch in the center of the wall portion 115, and a protruding portion of the locking portion 121 protrudes toward the base 112. A movable portion 117 is attached to the protruding portion via a shaft 122. An upper handle 116 that is held by the operator, and a holding portion 118 that holds the push rod 16 between the movable portion 117 and the base 112 are fixed to the movable portion 117.

[0051] On the back side of the wall portion 115 (the side opposite to the side where the base 112 is located), there are fixedly provided pairs on the left and right sides, each pair consisting of a slide shaft 120 that is inserted into the slide hole 102 and a stopper 119 that prevents the slide shaft 120 from slipping out of the slide hole 102. In addition, a metal roller 123 is attached to the slide shaft 120 so that the slide handle 110 can slide smoothly along the slide hole 102.

[0052] When sliding the push rod 16, the worker first lifts the upper handle 116 to open the movable part 117 as shown in FIG. 22(A), then slides the slide handle 110 upstream along the slide hole 102 to the part of the push rod 16 that is held by the slide handle 110, and then lowers the upper handle 116 to close the movable part 117 as shown in FIG. 22(B), thereby holding a part of the push rod 16 between the holding part 118 and the base 112. After holding a part of the push rod 16 with the slide handle 110, the worker slides the slide handle 110 downstream along the slide hole 102. By repeating this procedure, the worker pushes the long push rod 16 and the attached cable 12 toward the opening of the water collection pipe 3.

[0053] The slide handle 110 is not limited to the configuration of this embodiment, and may be configured to be slidable along the slide hole 102 while holding a portion of the push rod 16 .

[0054] Next, the configuration of the return prevention mechanism 140 will be described with reference to Figure 23. The return prevention mechanism 140 has a base 141 attached to the slide base 101, to which a first spring fixing portion 142 and a lower holding portion 146 are fixed, and to which an upper holding portion 143 is further attached so as to be rotatable by a shaft 147. The upper holding portion 143 has a second spring fixing portion 144, to which a spring 145 is attached.

[0055] As shown in FIG. 23(B), upper holding portion 143 has a generally trapezoidal shape when viewed from the side (front view in FIG. 23(B)), and one of the opposing non-parallel sides is curved. Furthermore, the shape and size of upper holding portion 143 and the position of axis 147 are designed so that when upper holding portion 143 rotates, a circle C drawn by point P on this curved side, which is the farthest point from axis 147 (center O), intersects with the upper side of push rod 16. This causes the portion of upper holding portion 143 corresponding to point P to abut against the upper part of push rod 16. Furthermore, upper holding portion 143 can rotate clockwise within the range in which spring 145 can be stretched (see FIG. 23(C)). However, when rotating counterclockwise, point P comes into contact with push rod 16 and can only rotate up to a predetermined position (see FIGS. 23(B) and 23(D)). On the other hand, the lower holding portion 146 abuts against the lower portion of the push rod 16 from below, and supports the push rod 16. In this manner, the upper holding portion 143 and the lower holding portion 146 sandwich the push rod 16 therebetween.

[0056] As shown in Figure 23(C), when a force acts to slide the push rod 16 in the forward direction (towards the opening of the water collection pipe 3), the upper retaining portion 143 rotates clockwise, causing the spring 145 to expand and not lock the push rod 16. On the other hand, as shown in Figure 23(D), when a force acts to slide the push rod 16 in the reverse direction, the upper retaining portion 143 rotates counterclockwise and is prevented from rotating at a predetermined position (the spring 145 contracts to maintain the prevention), causing the upper retaining portion 143 to press down and lock the push rod 16. In this way, the return prevention mechanism 140 can prevent the push rod 16 from sliding in the reverse direction even when a force acts on the push rod 16 in the reverse direction.

[0057] The return prevention mechanism 140 is not limited to the above configuration as long as the upper and lower holding portions 143 and 146 are configured to clamp and lock the push rod 16 when a force acts to slide the push rod 16 in the opposite direction, and the shapes of the upper and lower holding portions 143 and 146 can also be arbitrary.

[0058] As a modification of upper holding portion 143 of return prevention mechanism 140, the shape of the side surface of upper holding portion 143 may be changed as shown in Fig. 24. In other words, as shown in Fig. 24(B), upper holding portion 143 may be shaped so that a portion of it protrudes outside circle C drawn by point P. As a result, the more upper holding portion 143 rotates, the more upper holding portion 143 bites into push rod 16, and therefore the force with which it holds down push rod 16 is increased compared to upper holding portion 143 shown in Fig. 23(B).

[0059] Next, a brief description of the procedure for using the pushing device 100 will be given. The worker descends to the bottom of the vertical hole 4 and first manually inserts the mechanical part M through the opening of the water collection pipe 3. Next, the worker binds the push rod 16 and the leading end of the cable 12 with the elliptical frictional resistance reduction member 30A or 30B and then pushes the cable 12 into the hole. When manually pushing the cable 12 becomes difficult, the worker switches to using the pushing device 100 installed at the bottom of the vertical hole 4. Specifically, the push rod 16 is passed through the entrance roller 108A, the slide handle 110, and the exit roller 108B (or the return prevention mechanism 140). The cable 12 is also passed through each cable guide roller 107. Next, with the slide handle 110 not holding the push rod 16 (the movable part 117 is open), the slide handle 110 is slid toward the entrance roller 108A, bringing the slide handle 110 into a position where it holds the push rod 16 (the movable part 117 is closed). Next, the slide handle 110 is slid along the slide hole 102 to transport the push rod 16 and cable 12 from the ground side to the water collection pipe 3 side. After the slide handle 110 has been slid to the outlet roller 108B (or the return prevention mechanism 140), the slide handle 110 is once again placed in a state where it is not holding the push rod 16 (the movable part 117 is in the open state), and the slide handle 110 is then returned toward the inlet roller 108A. By repeating this series of operations, the push rod 16 and cable 12 are pushed into the water collection pipe 3 and transported. Note that every time the push rod 16 and cable 12 are pushed a certain length, an elliptical frictional resistance reducing member 30A or elliptical frictional resistance reducing member 30B is attached to the push rod 16 and cable 12 to bind them together, thereby reducing friction with the inner wall of the water collection pipe 3.

[0060] As described above, the pushing device 100 (an example of a "conveying device") of this embodiment is a device that transports a push rod 16 (an example of a "flexible, elongated object") along its longitudinal direction from a predetermined position above (an example of a "source of transport") to the opening of the water collection pipe 3 below the predetermined position (an example of a "destination of transport"), and is equipped with a slide base 101 (an example of a "conveying base") having a slide hole 102 (an example of a "long hole") curved from the direction of the predetermined position toward the opening of the water collection pipe 3, a slide shaft 120 (an example of an "insertion portion") that is inserted into the slide hole 102, and a holding portion 118 that holds a portion of the push rod 16, and a slide handle 110 (an example of a "holding tool") that moves along the slide hole 102 while the slide shaft 120 is inserted into the slide hole 102 while holding a portion of the push rod 16.

[0061] Therefore, according to the pushing device 100 of this embodiment, the push rod 16 at a predetermined upper position can be transported in the direction of the opening of the water collection pipe 3 below the predetermined position without requiring a large force.

[0062] Furthermore, in the pushing device 100, the return prevention mechanism 140 (an example of a "prevention means") does not prevent the movement of the push rod 16 when the movement direction of the push rod 16 is the forward direction from the direction of the predetermined position toward the opening of the water collection pipe 3, and prevents the movement of the push rod 16 when the movement direction is the opposite direction to the forward direction. This makes it possible to prevent the push rod 16 from moving backward even when a force acting on the push rod 16 to move in the opposite direction acts on it. The return prevention mechanism 140 includes, for example, a lower pressing portion 146 (an example of a "first abutment portion") that abuts against the push rod 16 from below in the movement direction of the push rod 16 (an example of "one of the directions perpendicular to the movement direction"), and an upper pressing portion 143 (an example of a "second abutment portion") that is rotatably arranged along the movement direction of the push rod 16 and abuts against the push rod 16 from above (an example of "a direction opposite to the one direction"); when the movement direction of the push rod 16 is in the opposite direction, the upper pressing portion 143 is restricted from rotating in the opposite direction, thereby locking the push rod 16.

[0063] Furthermore, in the pushing device 100, the slide base 101 (an example of a "conveying base") is provided with a cable guide roller 107 (an example of a "guide") that guides the cable 12 (an example of a "second elongated object") that moves together with the push rod 16 from a predetermined position toward the opening of the water collection pipe 3. This allows the cable 12 to be conveyed together with the push rod 16 toward the opening of the water collection pipe 3. [Explanation of symbols]

[0064] 1: Spring water removal equipment 2: Underdrain drainage material 3: Water collection pipe 4: Vertical hole 5: Connection part 6: Permeable sheet 10: Cutting device 11: Control device 11a: control section 11b: Operation section 11c: Display section 12: Cable 13: Packer 13A: Front Packer 13B: Medium Packer 13C: Rear Packer 14: Rotation mechanism 15: Arm mechanism 16: Push rod 20: Cutting blade 21: Side 22:Blade part 22a: Convex curved part 22b: Concave curved part 23: Protrusion 24: Discharge hole 24a: Blade part 25: Blade part 30A: Elliptical friction resistance reducing member 30B: Elliptical friction resistance reducing member 31a: First main body part 31b: Second main body part 32a: Omizo 32b: Omizo 33a: Small groove 33b: Small groove 34a: Tapped hole 34b: Tapped hole 35a: Bolt hole 35b: Bolt hole 36a: Bolt hole 36b: Bolt hole 37a: Joint surface 37b: Joint surface 40: Annular friction resistance reducing member 41a: 1st main body part 41b: Second main body part 42a: Bolt hole 42b: Bolt hole 43a: Tapped hole 43b: Tapped hole 44a: Bolt hole 44b: Bolt hole 45a: Inner diameter part 45b: Inner diameter 46a: Joint surface 46b: Joint surface 51a: 1st main body part 51b: Second main body part 52a: Omizo 52b: Omizo 53a: Small groove 53b: Small groove 54a: Tapped hole 54b: Tapped hole 55a: Bolt hole 55b: Bolt hole 56a: Bolt hole 56b: Bolt hole 57a: Joint surface 57b: Joint surface 58a: Nakamizo 58b: Nakamizo 100: Pushing device 101: Slide base 102: Slide hole 103: Foundation 104: Telescoping support 106: Horizontal material 107: Cable guide roller 108A: Entrance roller 108B: Exit roller 110: Slide handle 111: Lower handle 112: Bass 113: Bolt 114: Presser plate 115: Wall 116: Upper handle 117: Moving part 118: Holding part 119: Fastening part 120: Slide axis 121: Locking part 122: Axis 123: Metal roller 140: Anti-return mechanism 141: Bass 142: First spring fixing part 143: Upper presser foot 144: Second spring fixing part 145: Spring 146: Lower presser 147: Axis C: Circle M: Mechanical department O: Center Y: Arrow

Claims

1. A conveying device that conveys a flexible elongated object along a longitudinal direction from a conveying source to a conveying destination located below the conveying source, a transfer base having a slot curved from the transfer source direction to the transfer destination direction; a holder having an insertion portion inserted into the elongated hole and a holding portion for holding a portion of the elongated object, the insertion portion being inserted into the elongated hole and moving along the elongated hole while holding a portion of the elongated object; A conveying device comprising:

2. The conveying device according to claim 1 , A conveying device characterized by further comprising a restraining means that does not restrain the movement of the long object when the movement direction of the long object is a forward direction from the direction of the source of the conveyance to the direction of the destination of the conveyance, and restrains the movement of the long object when the movement direction is a direction opposite to the forward direction.

3. The conveying device according to claim 2, The suppression means a first contact portion that contacts the elongated object from one direction perpendicular to the moving direction; a second contact portion that contacts the elongated object from a direction opposite to the one direction; Equipped with A conveying device characterized in that the first abutment portion and the second abutment portion clamp and lock the long object when the movement direction is the opposite direction.

4. The conveying device according to claim 3, A conveying device characterized in that the second abutment portion is rotatable along the movement direction, rotation in the opposite direction is restricted, and the long object is clamped and locked between the second abutment portion and the first abutment portion.

5. The conveying device according to claim 1 , A conveying device characterized in that the conveying base is provided with a guide that guides a second elongated object that moves together with the elongated object from the direction of the source of the conveyance to the direction of the destination of the conveyance.

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