Conveying 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 technology for conveying long objects.

Background Art

[0002] In order to remove spring water below the building foundation of some nuclear power plants, spring water removal equipment 1 as shown in Figure 1 is provided. The spring water removal equipment 1 includes a culvert water collection and drainage member 2 (indicated by the dotted line in Figure 1) and a water collection pipe 3 (indicated by the solid line in Figure 1) connected thereto. The culvert water collection and drainage member 2 is, for example, a three-dimensional mesh molded product obtained by extrusion molding polypropylene resin into fibers with a diameter of about 2 mm (sometimes referred to as "plastic three-dimensional mesh molded product" or "Hichimalon (registered trademark)"), and its periphery is covered with a water-permeable sheet 6 such as a non-woven fabric (see Figure 2) to prevent fine stones, sand and the like in the soil from clogging. The spring water removal equipment 1 is provided underground. The culvert water collection and drainage member 2 collects underground spring water and flows it into the water collection pipe 3, so that the spring water flows through the water collection pipe 3 to the drainage pit, and the spring water is recovered by the drainage pump in the drainage pit and drained out of the spring water removal equipment 1.

[0003] The soundness of the spring water removal equipment 1 is indispensable for the safe operation of a nuclear power plant provided with the spring water removal equipment 1. Therefore, it is necessary to insert inspection equipment into the water collection pipe 3 through the vertical hole 4 dug to the depth of the spring water removal equipment 1 for inspection. However, at the connection portion 5 of the culvert water collection and drainage member 2 in the water collection pipe 3, as shown in Figure 2, the end of the culvert water collection and drainage member 2 protrudes into the water collection pipe 3, which hinders the passage of the inspection equipment and interferes with the inspection.

[0004] Accordingly, it is necessary to insert a cable into the inside of the water collection pipe 3 from the distal end side like an endoscope, and cut obstacles such as the culvert water collection and drainage member 2 with a cutting drill blade attached to the distal end thereof. However, since a long cable needs to be conveyed from the ground to the opening of the water collection pipe 3 located at the depth of the spring water removal equipment 1 and inserted into the inside of the water collection pipe 3, a great deal of labor is required.

[0005] In this context, Patent Document 1 discloses a conveying device that can transport flexible, long objects while suppressing deflection due to gravity. [Prior art documents] [Patent Documents]

[0006] [Patent Document 1] Japanese Patent Publication No. 2021-151311 [Overview of the Initiative] [Problems that the invention aims to solve]

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

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

[0009] This invention was made to achieve the above objective and has the following features.

[0010] The invention described in claim 1 is a conveying device for conveying a flexible, elongated object along its longitudinal direction from a conveying source to a conveying destination located below the conveying source, comprising: a conveying base having an elongated hole provided in a curved shape from the direction of the conveying source to the direction of the conveying destination; an insertion portion inserted into the elongated hole; and a holding portion for holding a part of the elongated object, wherein the holding device moves along the elongated hole while the insertion portion remains inserted into the elongated hole while holding a part of the elongated object. The transport base is equipped with a guide that guides a second long object, which moves together with the long object, from the direction of the transport source to the direction of the transport destination. It is characterized by the following:

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

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

[0013] The invention described in claim 4 is a conveying device according to claim 3, wherein the second contact portion is rotatably provided along the direction of movement, rotation in the opposite direction is restricted, and the long object is clamped and locked between it and the first contact portion. [Effects of the Invention]

[0015] According to this invention, a flexible, elongated object can be transported from a transport source to a transport destination located below the transport source by moving along a curved elongated hole while the holder holds a portion of the flexible, elongated object in the direction from the transport source to the transport destination. [Brief explanation of the drawing]

[0016] [Figure 1] This is a schematic plan view of the groundwater removal facility 1. [Figure 2] This is a schematic cross-sectional view of the water collection pipe 3. [Figure 3] This is a schematic diagram of the cutting device 10. [Figure 4] This is a perspective view of the cutting blade 20 from above. [Figure 5] This is a perspective view of the cutting blade 20 from below. [Figure 6] This is a front view of the cutting blade 20. [Figure 7] It is a rear view of the cutting blade 20. [Figure 8] It is a left side view of the cutting blade 20. [Figure 9] It is a right side view of the cutting blade 20. [Figure 10] It is an A-A cross-sectional view of the cutting blade 20. [Figure 11] (A) is a perspective view of the first main body portion 31a of the elliptical frictional resistance reducing member 30A, (B) is a plan view thereof, and (C) is a B-B cross-sectional view of (B). [Figure 12] (A) is a perspective view of the second main body portion 31b of the elliptical frictional resistance reducing member 30A, (B) is a plan view thereof, and (C) is a C-C cross-sectional view of (B). [Figure 13] (A) is a transparent perspective view of the first main body portion 51a of the elliptical frictional resistance reducing member 30B, (B) is a plan view thereof, and (C) is a D-D cross-sectional view of (B). [Figure 14] (A) is a transparent perspective view of the second main body portion 51b of the elliptical frictional resistance reducing member 30B, (B) is a plan view thereof, and (C) is an E-E cross-sectional view of (B). [Figure 15] (A) is a perspective view of the first main body portion 41a of the annular frictional resistance reducing member 40, (B) is a side view thereof, (C) is a plan view thereof, and (D) is a C-C cross-sectional view of (C). [Figure 16] (A) is a side view of the second main body portion 41b of the annular frictional resistance reducing member 40, (B) is a plan view thereof, and (C) is an E-E cross-sectional view of (B). [Figure 17] It is a diagram showing an example of the usage state of the pushing device 100. [Figure 18] It is a perspective view showing the pushing device 100. [Figure 19] It is a side view showing the pushing device 100. [Figure 20] It is a plan view showing the pushing device 100. [Figure 21] It is a front view showing the pushing device 100. [Figure 22](A) is a diagram showing the slide handle 110 in the open position, and (B) is a diagram showing the slide handle 110 in the closed position. [Figure 23] (A) is a perspective view showing the return prevention mechanism 140, (B) is a side view of the upper retaining portion 143, (C) is a side view showing the operation of the return prevention mechanism 140 when the push rod 16 slides in the forward direction, and (D) is a side view showing the operation of the return prevention mechanism 140 when the push rod 16 slides in the reverse direction. [Figure 24] (A) is a perspective view showing the return prevention mechanism 140 in a modified example, (B) is a side view of the upper pressing portion 143 in a modified example, and (C) is a side view showing the return prevention mechanism 140 in a modified example. [Modes for carrying out the invention]

[0017] Embodiments of the present invention will be described with reference to the drawings. In this embodiment, a cutting device 10 for cutting the underground drainage material 2 covered with a permeable sheet 6 inside the drainage pipe 3 will be described.

[0018] As shown in Figure 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 (sometimes the front packer 13A, middle packer 13B, and rear packer 13C are collectively referred to as packer 13), a rotating mechanism 14, and an arm mechanism 15. The cutting blade 20 shown in Figures 4-10 is attached to the rotating mechanism 14. For example, the MICROpremium from IMSrobotics can be used as the cutting device 10. Elliptical friction resistance reducing members 30A and 30B are attached to the cable 12 and the push rod 16, which will be described later, and an annular friction resistance reducing member 40 is attached to a part 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 control programs for controlling the cutting device 10 are pre-stored, and a RAM for temporarily storing various data. The operation unit 11b includes a joystick or keyboard and receives operator input and transmits operation data indicating the operation to the control unit 11a. Based on the operation data, the control unit 11a determines which operation has been performed and executes controls to operate the cutting device 10 according to the operation. 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 rear packer 13C expand due to air supplied from a compressor (not shown), causing them to adhere tightly to the inner surface of the water collection pipe 3 and fix themselves in place. The middle packer 13B also expands and contracts axially (in the front-to-back direction) due to air supplied from a compressor (not shown). The peristaltic motion resulting from the combination of the fixing of the front packer 13A or rear packer 13C and the expansion and contraction of the middle packer 13B moves the cable 12 and the mechanical part M back and forth inside the water collection pipe 3. The cable 12 passes through the packer 13.

[0021] The rotating mechanism 14 is provided at the tip of the machine part M and has a mounting part for attaching the cutting blade 20, which will be described later. Under the control of the control unit 11a, the rotating mechanism 14 rotates the cutting blade 20 to cut the underground drainage material 2 covered with the permeable sheet 6.

[0022] The arm mechanism 15 is located between the front packer 13A and the rotating mechanism 14, and changes the position and orientation of the rotating mechanism 14 by the force of an air cylinder or motor (not shown). For example, as a mechanism to orient the rotating mechanism 14 upward, a spring that bends the rotating mechanism 14 upward and an air cylinder that straightens this bent portion may be provided. By supplying air to the air cylinder, the bent portion is straightened, and by stopping the supply of air to the air cylinder, the bent portion is bent by the force of the spring. The arm mechanism 15 is also equipped with a camera (not shown), which captures the cutting blade 20 cutting the object to be cut and transmits the video data to the control device 11. Based on the video data, the cutting of the object to be cut is displayed in real time on the display unit 11c, and the operator can operate while viewing this.

[0023] Here, the cutting blade 20 will be described using Figures 4-10. The cutting blade 20 is cylindrical in shape and made of metal (for example, S45C, carbon steel for machine structures). The cylindrical shape allows for reduced water resistance even underwater, and the rotational speed of the cutting blade 20 does not decrease easily, thus enabling cutting underwater. Furthermore, by applying a predetermined coating to the cutting blade 20 after heat treatment, the cutting ability does not deteriorate easily even when cutting the underground drainage material 2, and it has the durability to cut continuously.

[0024] One end of the cutting blade 20 in the axial direction (upward, as shown in Figure 6) has a corrugated blade portion 22 when viewed from the side. The corrugated blade portion 22 consists of alternating convex curved portions 22a and concave curved portions 22b. The blade portion 22 is sharp on at least 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 through the underground drainage material 2 and the permeable sheet 6.

[0025] The cutting blade 20 has a projection 23 made of metal (for example, cemented carbide (JIS symbol: HW)) on the outside of its side surface 21. This allows the drainage material 2 to be cut not only by the cutting edge 22 but also by the projection 23 on the side, thereby shortening the cutting time.

[0026] A discharge hole 24 is formed on the side surface 21 of the cutting blade 20, allowing the cut drainage material 2 and permeable sheet 6 to be discharged to the outside of the cutting blade 20 through the discharge hole 24. This prevents the cut material from clogging the cutting blade 20 and allows for continuous cutting. In addition, the edge of the discharge hole 24 is also sharpened inward or outward (i.e., a blade portion 24a is formed on the edge of the discharge hole 24), which allows foreign matter that clings to the cutting blade 20 to be cut and removed.

[0027] Multiple blade portions 25 are also formed at the other end of the cutting blade 20 in the axial direction (downward, as shown in Figure 6, etc.). The blade portions 25 have a sharp shape that is pointed inward, allowing them to cut and remove foreign matter that is clinging to the cutting blade 20 when the machine part M is pulled back from inside the water collection pipe 3.

[0028] Returning to Figure 3, cable 12 is made up of multiple cables bundled together. For example, cable 12 includes a cable for rotating the rotating mechanism 14, air piping for inflating the front packer 13A, middle packer 13B, and rear packer 13C, air piping for the arm mechanism 15, a signal cable for the camera, and so on.

[0029] The cable 12 moves through the water collection pipe 3 together with the mechanical part M, while in contact with the lower surface inside the water collection pipe 3. The mechanical part M and cable 12 can be pushed in by hand in straight pipes, as well as by the peristaltic movement of the packer 13. However, when turning a corner or after passing through a curve, the cable 12 buckles and can no longer be pushed in by hand, so it is moved to the back of the water collection pipe 3 by being pushed in by the pushing device 100 described later. Specifically, the mechanical part M and cable 12 are inserted into the opening of the water collection pipe 3 created by removing a part of the water collection pipe 3 in the vertical hole 4, and the push rod 16, which is prepared to push in the cable 12, is pushed in together with the cable 12 by the pushing device 100.

[0030] When the mechanical part M and cable 12 move inside the water collection pipe 3, frictional resistance is generated between the mechanical part M and cable 12 and the inner surface of the water collection pipe 3. In particular, the frictional resistance increases after passing through a bend in the water collection pipe 3, so there is a limit to the distance that the mechanical part M and cable 12 can move. Therefore, an annular friction resistance reducing member 40 is attached to the mechanical part M, and elliptical friction resistance reducing members 30A and 30B are attached to the cable 12, respectively, in order to extend the distance they can move.

[0031] Next, the elliptical friction resistance reducing member 30A will be described using Figures 11 and 12. The elliptical friction resistance reducing member 30A has an ellipsoidal shape, and the first main body portion 3 is obtained by cutting it in half. It has a first body part 1a (see Figure 11) and a second body part 31b (see Figure 12). As shown in Figures 11(A)-(C), the first body part 31a has a large groove 32a and a small groove 33a with a semicircular cross-section formed on the joining surface 37a that joins with the second body part 31b. Bolt holes 35a, 36a and tapped holes 34a are formed in directions perpendicular to the large groove 32a and the small groove 33a. Similarly, as shown in Figures 12(A)-(C), the second body part 31b has a large groove 32b and a small groove 33b with a semicircular cross-section formed on the joining surface 37b that joins with the first body part 31a. Bolt holes 35b, 36b and tapped holes 34b are formed in directions perpendicular to the large groove 32b and the small groove 33b. Tapped holes 34a and 34b are tapped for set screws. Additionally, bolt holes 35b and 36b are tapped for connecting bolts.

[0032] To attach the elliptical friction resistance reducing member 30A to the cable 12 and 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. Then, the joining surfaces 37a and 37b are aligned, and joining bolts are inserted into the bolt holes 35a and 36a, respectively, and fixed in the tapped bolt holes 35b and 36b. Set screws are also screwed into the tapped holes 34a and 34b, respectively, and the tips of the set screws are brought into contact with the push rod 16. In this way, the elliptical friction resistance reducing member 30A is attached to the cable 12 and push rod 16.

[0033] Next, the elliptical friction resistance reducing member 30B will be described using Figures 13 and 14. The elliptical friction resistance reducing member 30B has an ellipsoidal shape and consists of a first main body portion 51a (see Figure 13) and a second main body portion 51b (see Figure 14), which are obtained by splitting the ellipsoid in half. As shown in Figures 13(A)-(C), the first main body portion 51a has a large groove 52a, a medium groove 58a, and a small groove 53a with a semicircular cross-section formed on the joint surface 57a that joins with the second main body portion 51b. Bolt holes 55a, 56a, and tapped holes 54a are formed in directions perpendicular to the large groove 52a, medium groove 58a, and small groove 53a. Similarly, as shown in Figures 14(A)-(C), the second main body portion 51b has a large groove 52b, a medium groove 58b, and a small groove 53b with a semicircular cross-section formed on the joint surface 57b that joins with the first main body portion 51a. Furthermore, bolt holes 55b, 56b and tapped holes 54b are formed in directions perpendicular to the large groove 52b, medium groove 58b, and small groove 53b. Tapped holes 54a and 54b are tapped for set screws. In addition, bolt holes 55b and 56b are tapped for connecting bolts.

[0034] The elliptical friction-reducing member 30B is attached to the camera signal cable, the cable 12 (excluding the camera signal cable), and the push rod 16. To attach the elliptical friction-reducing 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. Then, the joining surfaces 57a and 57b are aligned, and joining bolts are inserted into the bolt holes 55a and 56a, respectively, and fixed in the tapped bolt holes 55b and 56b. Set screws are also screwed into the tapped holes 54a and 54b, respectively, and the tips of the set screws are brought into contact with the push rod 16. In this way, the elliptical friction-reducing member 30B is attached to the camera signal cable, the cable 12 (excluding the camera signal cable), and the push rod 16.

[0035] Next, the annular friction resistance reducing member 40 will be described using Figures 15 and 16. The annular friction resistance reducing member 40 is annular in shape and has a first main body portion 41a (see Figure 15) and a second main body portion 41b (see Figure 16), which are obtained by splitting the annular shape in half. As shown in Figures 15(A)-(D), bolt holes 42a, 44a and tapped holes 43a are formed in the first main body portion 41a. Similarly, as shown in Figures 16(A)-(C), bolt holes 42b, 44b and tapped holes 43b are formed in the second main body portion 41b. Tapped holes 43a and 43b are tapped for set screws. In addition, bolt holes 42a and 44a are tapped for joining bolts.

[0036] To attach the annular friction resistance reducing member 40 to the cylindrical part of the machine part M, the cylindrical part 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, then the joining surfaces 46a and 46b are brought together, and joining bolts are inserted into the bolt holes 42b and 44b respectively and fixed in the tapped bolt holes 42a and 44a. Set screws are also screwed into the tapped holes 43a and 43b respectively, and the tips of the set screws are brought into contact with the cylindrical part. In this way, the annular friction resistance reducing member 40 is attached to the cylindrical part of the machine part M.

[0037] As described above, the cutting device 10 of this embodiment is a cutting device that cuts the underground drainage material 2 covered with a permeable sheet 6 inside the drainage pipe 3 by rotating a cylindrical cutting blade 20, wherein one end of the cutting blade 20 has a corrugated blade portion 22 when viewed from the side, and the corrugated blade portion 22 has 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, which has a corrugated blade portion 22 in which convex curved portions 22a and concave curved portions 22b are alternately continuous, rotates to cut the underground drainage 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 can cut the permeable sheet 6 and the underground drainage material 2 without encountering water resistance even when water is present inside the water collection pipe 3.

[0039] Furthermore, protrusions 23 are formed on the outer side surface of the cutting blade 20. This allows the drainage material 2 to be cut not only by the cutting edge 22 but also by the protrusions 23 on the side, 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 underground drainage material 2 to the outside of the cutting blade 20. This prevents the cut material from clogging the cutting blade 20 and allows for 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 that has become entangled with the cutting blade 20.

[0042] Furthermore, elliptical friction-reducing members 30A and 30B are attached to a portion of the outer circumference of the cable 12 to reduce frictional resistance between the cable 12 and the inner surface of the water collection pipe 3 as the cable 12 moves inside the water collection pipe 3. This reduces frictional resistance between the mechanical part M and the cable 12 and the inner surface of the water collection pipe 3, thereby extending the travel distance.

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

[0044] Next, the pushing device 100 will be described using Figures 17-23. The pushing device 100 is installed at the bottom of the vertical hole 4 and is used to push the cable 12 extending from the control device 11, which is located at a predetermined position on the ground (next to the vertical hole 4), and the push rod 16 into the water collection pipe 3. As shown in Figure 17, the pushing device 100 has a curved slide hole 102 formed in the slide base 101, and the slide handle 110 holds a part of the push rod 16 and slides the slide hole 102 from the ground side to the water collection pipe 3 side, thereby pushing the push rod 16 toward the opening of the water collection pipe 3. An inlet roller 108A is provided on the upstream side of the slide hole 102, which guides the push rod 16 to move along the slide hole 102, and an outlet roller 108B is provided on the downstream side of the slide hole 102, which guides the push rod 16 toward the opening of the water collection pipe 3. Furthermore, the lower part of the slide base 101 is provided with multiple cable guide rollers 107 for guiding the cable 12 from the ground side to the water collection pipe 3 side.

[0045] The operator transports the push rod 16 and cable 12 from the ground side to the water collection pipe 3 side by sliding the slide handle 110 along the slide hole 102 while the slide handle 110 holds the push rod 16. Although Figure 17 shows two slide handles 110, there may be just one slide handle 110, or three or more may be provided if the sliding distance is long.

[0046] Next, the configuration of the pushing device 100 will be explained using Figures 18-21. Note that in Figures 18 and onward, the explanation will describe the case where a return prevention mechanism 140, which prevents the push rod 16 from returning in the reverse direction, is provided instead of the exit roller 108B.

[0047] The slide base 101 has a slide hole 102 that is curved in the direction from the predetermined position where the control device 11 above is located towards the opening of the water collection pipe 3 when viewed from the side. The slide base 101 is fixed to a plurality of telescopic support columns 104 erected on a base 103 which is assembled in a grid pattern when viewed from above, via horizontal members 106, etc. The height of the slide base 101 can be adjusted by the telescopic support columns 104. The horizontal members 106 are fixed to the plurality of telescopic support columns 104.

[0048] The cable guide roller 107 has two rollers, through which the cable 12 passes. The inlet roller 108A also has two rollers, through which the push rod 16 passes. These rollers allow the worker to smoothly push the cable 12 and push rod 16 into the water collection pipe 3 with less force than would be possible without the pushing device 100.

[0049] Next, the configuration of the slide handle 110 will be described using Figure 22. The slide handle 110 has a base 112 and a wall portion 115 fixed perpendicularly to the base 112. A lower handle 111 for the operator to grip is fixed to the side of the base 112. Bolts 113 are erected near both ends of the upper surface of the base 112, at a distance from the wall portion 115 that allows the push rod 16 to be inserted. Furthermore, a retaining plate 114 is fixed horizontally to each bolt 113 at a position spaced apart from the base 112. As indicated by the arrow Y, the push rod 16 is inserted into the left and right gaps enclosed by the base 112, the wall portion 115, the bolts 113, and the retaining plates 114.

[0050] A locking portion 121 is fixed to the central notch of the wall portion 115, with a protruding portion of the locking portion 121 projecting toward the base 112. A movable portion 117 is attached to the protruding portion via a shaft 122. A top handle 116 for the worker to grip and a holding portion 118 for holding the push rod 16 between 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 with the base 112), a set consisting of a slide shaft 120 inserted through the slide hole 102 and a retaining part 119 that prevents the slide shaft 120 from coming out of the slide hole 102 is fixed to each side. 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 the worker slides the push rod 16, first, as shown in Figure 22(A), they lift the upper handle 116 to open the movable part 117, and slide the slide handle 110 upstream along the slide hole 102 until it reaches the portion of the push rod 16 that will be held by the slide handle 110. Then, as shown in Figure 22(B), they lower the upper handle 116 to close the movable part 117, thereby holding a portion of the push rod 16 between the holding part 118 and the base 112. Once a portion of the push rod 16 is held by the slide handle 110, the slide handle 110 is slid downstream along the slide hole 102. By repeating this operation, the worker pushes the long push rod 16 and its associated 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 can be configured to slide along the slide hole 102 while holding a part of the push rod 16.

[0054] Next, the configuration of the return prevention mechanism 140 will be explained using Figure 23. The return prevention mechanism 140 has a base 141 that is attached to the slide base 101. A first spring fixing part 142 and a lower pressing part 146 are fixed to the base 141, and an upper pressing part 143 is rotatably attached by a shaft 147. The upper pressing part 143 has a second spring fixing part 144, and springs 145 are attached to the first spring fixing part 142 and the second spring fixing part 144.

[0055] As shown in Figure 23(B), the upper retaining portion 143 has a roughly trapezoidal shape when viewed from the side (front view in Figure 23(B)), with one of the opposite sides being curved. Furthermore, the shape and size of the upper retaining portion 143 and the position of the axis 147 are designed so that when the upper retaining portion 143 rotates, the circle C traced by point P, which is furthest from axis 147 (center O) on this curved side, intersects with the upper side of the push rod 16. As a result, the portion of the upper retaining portion 143 corresponding to point P contacts the upper part of the push rod 16. The upper retaining portion 143 can rotate clockwise within the range in which the spring 145 can be stretched (see Figure 23(C)), but when rotated counterclockwise, the portion at point P contacts the push rod 16 and it can only rotate to a predetermined position (see Figures 23(B) and (D)). On the other hand, the lower pressing portion 146 contacts the lower part of the push rod 16 from below, supporting the push rod 16. In this way, the upper pressing portion 143 and the lower pressing portion 146 sandwich the push rod 16 between them.

[0056] As shown in Figure 23(C), when a force acts on the push rod 16 to slide in the forward direction (towards the opening of the water collection pipe 3), the upper retaining part 143 rotates clockwise, causing the spring 145 to extend and preventing the push rod 16 from locking. On the other hand, as shown in Figure 23(D), when a force acts on the push rod 16 to slide in the reverse direction, the upper retaining part 143 rotates counterclockwise and is prevented from rotating at a predetermined position (the spring 145 contracts to maintain the prevention), causing the upper retaining part 143 to press down on and lock the push rod 16. In this way, the return prevention mechanism 140 prevents the push rod 16 from sliding in the reverse direction even when a force is applied to it in the reverse direction.

[0057] Furthermore, the return prevention mechanism 140 is not limited to the above configuration, as long as the upper pressing portion 143 and the lower pressing portion 146 lock the push rod 16 in place when a force acts to slide the push rod 16 in the reverse direction. The shapes of the upper pressing portion 143 and the lower pressing portion 146 can also be arbitrary.

[0058] Furthermore, as a modification of the upper pressing portion 143 of the return prevention mechanism 140, the shape of the side of the upper pressing portion 143 may be changed as shown in Figure 24. That is, as shown in Figure 24(B), a part of the upper pressing portion 143 may protrude outside the circle C drawn by point P. As a result, the upper pressing portion 143 bites into the push rod 16 as it rotates, thus improving the force that holds down the push rod 16 compared to the upper pressing portion 143 shown in Figure 23(B).

[0059] Next, the procedure for using the pushing device 100 will be briefly explained. The worker descends to the bottom of the vertical hole 4 and first inserts the mechanical part M by hand through the opening of the water collection pipe 3. Then, the leading ends of the push rod 16 and cable 12 are secured with the elliptical friction resistance reducing member 30A or elliptical friction resistance reducing member 30B before being pushed in. When pushing by hand becomes difficult, the worker switches to pushing using the pushing device 100 installed at the bottom of the vertical hole 4. Specifically, the push rod 16 is passed through the inlet roller 108A, the slide handle 110, and the outlet 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 (movable part 117 in the open state), the slide handle 110 is slid towards the inlet roller 108A, so that the slide handle 110 holds the push rod 16 (movable part 117 in the closed state). 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 sliding the slide handle 110 to the outlet roller 108B (or the return prevention mechanism 140), the slide handle 110 is returned to the inlet roller 108A after it has been returned to a state where it does not hold the push rod 16 (movable part 117 is in the open state). By repeating this series of operations, the push rod 16 and cable 12 are pushed into and transported into the water collection pipe 3. In addition, each time a certain length is pushed in, the elliptical friction resistance reducing member 30A or elliptical friction resistance reducing member 30B that binds them together is attached to the push rod 16 and cable 12 to reduce friction with the inner wall of the water collection pipe 3.

[0060] As described above, the pushing device 100 of this embodiment (an example of a "conveying device") is a device that conveys a push rod 16 (an example of a "flexible long object") along its longitudinal direction from a predetermined position above (an example of a "conveying source") to an opening of a water collection pipe 3 below the predetermined position (an example of a "conveying destination"), and comprises a slide base 101 (an example of a "conveying base") having a slide hole 102 (an example of an "elongated hole") provided in a curved shape 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 part") inserted through the slide hole 102, and a holding part 118 that holds a part of the push rod 16, and a slide handle 110 (an example of a "holding device") which moves along the slide hole 102 while the slide shaft 120 is inserted through the slide hole 102 while holding a part of the push rod 16.

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

[0062] Furthermore, the pushing device 100 has a return prevention mechanism 140 (an example of a "restraining means") which does not restrain the movement of the push rod 16 when the direction of movement of the push rod 16 is in the forward direction from the direction of the predetermined position to the direction of the opening of the water collection pipe 3, but restrains the movement of the push rod 16 when the direction of movement is in the opposite direction to the forward direction. This prevents the push rod 16 from moving backward even if a force acting on the push rod 16 moves it in the reverse direction. The return prevention mechanism 140 includes, for example, a lower pressing portion 146 (an example of a "first contact portion") that contacts the push rod 16 from below (an example of "one of the directions perpendicular to the direction of movement") with respect to the direction of movement of the push rod 16, and an upper pressing portion 143 (an example of a "second contact portion") that is rotatably provided along the direction of movement of the push rod 16 and contacts the push rod 16 from above (an example of "the direction opposite to the aforementioned one direction"). The upper pressing portion 143 restricts rotation in the reverse direction when the direction of movement of the push rod 16 is reversed, thereby locking the push rod 16.

[0063] Furthermore, the pushing device 100 includes a slide base 101 (an example of a "conveyor base") which is equipped with a cable guide roller 107 (an example of a "guide") that guides the cable 12 (an example of a "second long object"), which moves together with the push rod 16, from the direction of 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: Groundwater removal equipment 2: Underground drainage material 3: Water collection pipe 4: Vertical hole 5: Connection part 6: Permeable sheet 10: Cutting device 11: Control device 11a: Control Unit 11b: Operation section 11c: Display section 12: Cable 13: Packer 13A: Front Packer 13B: Medium Packer 13C: Rear Packer 14: Rotating mechanism 15: Arm mechanism 16: Pushrod 20: Cutting blade 21: Side view 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: Base 104: Telescoping support 106: Horizontal material 107: Cable guide roller 108A: Inlet roller 108B: Exit Roller 110: Slide handle 111: Lower handlebars 112: Bass 113: Bolt 114: Pressing 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: Return prevention mechanism 141: Bass 142: First spring fixing part 143: Upper retaining part 144: Second spring fixing part 145: Spring 146: Lower retaining part 147: Axis C: Yen M: Mechanical department O: Center Y: Arrow

Claims

1. A conveying device that conveys a long, flexible object along its longitudinal direction from a conveying source to a conveying destination located below the conveying source, A transport base having an elongated hole arranged in a curved shape from the direction of the transport source to the direction of the transport destination, A holder having an insertion portion that is inserted into the elongated hole and a holding portion that holds a part of the elongated object, wherein the insertion portion moves along the elongated hole while holding a part of the elongated object, Equipped with, The conveying device is characterized in that the conveying base is provided with a guide that guides a second long object, which moves together with the long object, from the direction of the conveying source to the direction of the conveying destination.

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

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

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

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