Notch forming device

Abstract

To perform coating notch formation safely and with good workability.SOLUTION: A notch forming device 11 for forming notches in a coating 2 formed on the inner surface of a lining pipe 1, which is arranged within the lining pipe 1 to extend in a pipe diameter direction and is driven to travel in a pipe axis 1a direction, has a device body 12 capable of being arranged within the lining pipe to extend in the vertical direction, a first trolley 13 provided at the upper end of the device body, and a second trolley 14 provided at the lower end of the device body. The first trolley has a wheel-shaped first rolling member 15a and a second rolling member 15b capable of rolling on the inner surface of the lining pipe and traveling in the pipe axis direction. The first rolling member and the second rolling member are arranged in a front-to-back direction. The second trolley includes a wheel-shaped third rolling member 15c and a fourth rolling member 15d capable of rolling along the inner surface of the lining pipe and traveling in the pipe axial direction. The third and fourth rolling members are arranged in a front-to-back direction. At least one of the first to fourth rolling members is a disc-shaped rotating blade 16 capable of forming a cut in the coating.SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] The present invention relates to a notch forming device, and more particularly to a device for making notches in old coatings to facilitate peeling when regenerating tubular members with coatings, such as lined steel pipes. [Background technology]

[0002] Lined pipes (sometimes simply referred to as "pipes" in this application) are used in a variety of industrial fields. These are made by applying a coating made of polyolefins such as polyethylene and polypropylene, or resin materials such as vinyl chloride, or rubber materials to the surface (inner or outer surface; in this application, this refers specifically to the coating formed on the inner surface) of metal pipes such as steel pipes.

[0003] For example, polyethylene powder lined steel pipe (PEL), which is made by heat-fusing polyethylene powder onto the surface of a steel pipe to form a coating, has excellent features such as chemical and physical stability of the coating and ease of processing, and is therefore used as corrosion-resistant steel pipe for transporting various fluids.

[0004] In recent years, efforts have been made to reuse lined pipes in order to recycle resources and reduce the burden on the environment. To reuse, the old coating that has deteriorated over time is peeled off and a new coating is formed to restore the lined pipe.

[0005] Furthermore, Patent Document 1 below is a document that discloses a technique for peeling off a coating from a lining pipe. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Application Laid-Open No. 2001-191330 Summary of the Invention [Problem to be solved by the invention]

[0007] Incidentally, when peeling off the old coating from a lining pipe, it was conventional to make cuts in the coating with a utility knife to separate it, making it easier to peel off.

[0008] However, there is room for improvement in terms of safety and ease of use in this type of cutting work. Using a utility knife not only poses the risk of injury, but also requires a great deal of effort. Furthermore, depending on the diameter and length of the pipe, it may be difficult to reach the pipe and make the cut.

[0009] On the other hand, the aforementioned Patent Document 1 discloses an instrument for cutting an incision in a coating formed on the inner surface of a pipe (see Figure 6 of the drawings in the document and paragraphs

[0062] to

[0067] of the specification). However, since the instrument is supported inside the pipe by only two blades, one above and one below, it is not necessarily easy to stably move the instrument in the pipe axial direction and perform the cutting operation with good workability.

[0010] Therefore, an object of the present invention is to enable the cutting work of the coating to be performed safely and with good workability. [Means for solving the problem]

[0011] In order to solve the above problems and achieve the object, the incision forming device of the present invention is an incision forming device that is arranged inside a lining pipe so as to extend in the pipe diameter direction and travels in the pipe axial direction to form incisions in a coating formed on the inner surface of the lining pipe, and has an apparatus main body that can be arranged inside the lining pipe so as to extend in the up and down direction when one side in the pipe axial direction is defined as the "front", the other side in the pipe axial direction is defined as the "rear", one side in the pipe diameter direction is defined as the "up" and the other side in the pipe diameter direction is defined as the "down", a first carriage provided at the upper end of the apparatus main body, and a second carriage provided at the lower end of the apparatus main body, and the first carriage rolls on the inner surface of the lining pipe. The second carriage has a first wheel-shaped rolling element that can run in the pipe axis direction by rolling on the inner surface of the lining pipe, and a second wheel-shaped rolling element that can run in the pipe axis direction by rolling on the inner surface of the lining pipe, the first and second rolling elements being arranged in the front-to-rear direction, the second carriage has a third wheel-shaped rolling element that can run in the pipe axis direction by rolling on the inner surface of the lining pipe, and a fourth wheel-shaped rolling element that can run in the pipe axis direction by rolling on the inner surface of the lining pipe, the third and fourth rolling elements being arranged in the front-to-rear direction, and at least one of the first rolling element, second rolling element, third rolling element and fourth rolling element is a disc-shaped rotary blade that can form an incision in the coating.

[0012] In this application, the incision forming device may be referred to as the "incision device" or "the device" or simply as the "device", the lining pipe may be referred to simply as the "pipe", and the rotary blade may be referred to simply as the "blade".

[0013] Furthermore, the "diametrical direction" refers to the diameter direction of the lined pipe, and in this invention, one side of the diametrical direction is defined as "up" and the other side as "down." However, since this device can be used in various positions (angles) by rotating it around the axis (central axis) of the lined pipe (for example, in the embodiment described below, it can be used in a horizontal position rotated 90 degrees around the pipe axis 1a or handle bar, or in an oblique position rotated at a desired angle), "down" does not necessarily mean the direction of gravity and "up" does not necessarily mean the direction opposite to gravity. Furthermore, the "axial direction" refers to the axial direction of the lined pipe (i.e., the direction in which the central axis extends), in other words, the length direction of the lined pipe. Furthermore, the direction perpendicular to the front-rear and up-down directions is the "left-right direction."

[0014] Furthermore, as will be explained later as a modified example of the embodiment, it is also possible to configure the device of the present invention so that the first and second rolling elements, as well as the third and fourth rolling elements, are each arranged at an angle to the tube axis to form a spiral cut, and therefore the "front-to-back direction" in the present invention is not limited to a direction strictly parallel to the tube axis, but is a concept that includes directions that are angled (inclined) to the tube axis, such as "diagonally forward" and "diagonally backward."

[0015] The incision forming device of the present invention is a device that is placed inside the lining pipe so as to extend in the diameter direction of the lining pipe (like a so-called tension rod), and is moved in the pipe axial direction (front-to-back direction) to form incisions in the coating formed on the inner peripheral surface of the pipe. For this purpose, the device main body extends in the diameter direction of the lining pipe through the central axis of the lining pipe, and is equipped with carriages at both ends (upper and lower ends) of the device main body. Each carriage has wheel-shaped rolling elements that can run in the pipe axial direction.

[0016] Each rolling element on each carriage is typically a disk-shaped rotary blade capable of cutting the coating (forming an incision in the coating). However, the present invention is not limited to this embodiment, and each rolling element may be a member such as a roller or tire that simply rolls (runs while rotating) on ​​the surface of the coating, rather than a blade that cuts (makes an incision in) the coating. Note that in order to form an incision in the coating, at least one of the first rolling element, second rolling element, third rolling element, and fourth rolling element is a blade (rotary blade).

[0017] According to the cutting device of the present invention, carriages (first carriage and second carriage) are provided at both ends of the diameter of the lining pipe, and each carriage is provided with rolling elements arranged in the front and back, so that the device is less likely to tip over left and right or front and back, and can be moved (traveled) stably in the axial direction of the pipe within the pipe, allowing for smooth and efficient cutting formation work.

[0018] In the incision forming device of the present invention, one or a combination of the following structures (1) to (8) can be preferably adopted as a more specific structure.

[0019] (1) The rotary blade is provided with a pair of rotary blades arranged side by side in the left-right direction. With this structure, the rotary blade can be advanced stably without swaying or wobbling from side to side during cutting work, further improving workability. Furthermore, if the rotary blade can be advanced stably in this way, it is possible to prevent situations where the rotary blade is subjected to force in the lateral direction (a direction intersecting the blade) and the blade is damaged, for example.

[0020] (2) The structure (1) further includes a blade spacing adjustment mechanism that changes the spacing between the pair of rotary blades. This structure allows the rotary blades to be applied more appropriately (close to perpendicular to the coating) to the pipe diameter, for example by widening the blade spacing for pipes with a large diameter or narrowing the blade spacing for pipes with a small diameter. This makes it easier to cut into the coating and reduces the lateral force (direction intersecting the blades) applied to the rotary blades, preventing damage to the blades.

[0021] (3) A carriage support unit is provided that supports at least one of the first carriage and the second carriage so that the vertical position of the carriage can be changed. With this structure, it is possible to form cuts in lining pipes of various pipe diameters.

[0022] (4) In the structure (3), the carriage support part urges the carriage supported by the carriage support part toward the inner surface of the lining pipe. This structure makes it easier to press the rotary blade against the coating and form a cut.

[0023] (5) In the structure (4), the carriage support unit has an air cylinder that supports the carriage supported by the carriage support unit so that the position of the carriage supported by the carriage support unit can be changed in the vertical direction. With this structure, by changing the air pressure supplied to the air cylinder, it is possible to adjust the pressing force of the rotary blade against the coating (the force that urges the carriage toward the inner surface of the lining pipe) to a more appropriate magnitude corresponding to the type (material), hardness, thickness, etc. of the coating.

[0024] (6) In the above structure (5), the cart support further includes a cylinder filled with air for driving the air cylinder, and an air circuit that supplies the air filled in the cylinder to the air cylinder and switches the driving direction of the air cylinder in the vertical direction. This structure eliminates the need to connect a power cord or air hose (compressor or air piping) to the device, so cutting work can be performed using the device alone regardless of the work site, and cutting work can be performed efficiently without being bothered (hindered) by cords or hoses.

[0025] It should be noted that the above "air" does not mean only air, but is a concept that includes various gases that can drive an air cylinder, and the air filled in the cylinder may be a gas other than air (for example, carbon dioxide).

[0026] (7) The first and third rolling elements are arranged at the same position in the front-rear and left-right directions, and the second and fourth rolling elements are arranged at the same position in the front-rear and left-right directions. With this structure, the rotary blade is reliably supported in the lining pipe by the first and second carriages, and the carriage (this device) can travel stably, improving workability.

[0027] (8) The cutting device has a rod-shaped handle bar for moving the first and second carts (this device). Other methods are possible for moving this device inside the pipe, such as towing it with a wire rope or installing a motor to make it self-propelled. While a means for moving the cart is not necessarily required when moving the lining pipe, providing a handle bar as described above makes it possible to move this device forward and backward by pushing and pulling the handle bar. Furthermore, by lengthening the handle bar, this device can be used to reach deep inside the pipe, even in places that are difficult to reach by hand, allowing for cutting work.

[0028] In the present invention described above, a rotary blade is provided to make cuts in the coating, but the same purpose can be achieved by providing a plate-shaped blade (called a "translating blade") that cuts the coating by moving linearly without rotating (maintaining its position) like the blade of a cutter knife. Specifically, this is as follows.

[0029] Another incision forming device according to the present invention is an incision forming device that is disposed inside a lining pipe so as to extend in the pipe diameter direction and travels in the pipe axis direction to form incisions in a coating formed on the inner surface of the lining pipe. When one side in the pipe axis direction is the front, the other side in the pipe axis direction is the rear, and one side in the pipe diameter direction is the top and the other side in the pipe diameter direction is the bottom, the device has an apparatus main body that can be disposed inside the lining pipe so as to extend in the up and down direction, a first carriage provided at the upper end of the apparatus main body, and a second carriage provided at the lower end of the apparatus main body. The first carriage is a carriage that moves the lining pipe. The second carriage has a first running body that can run in the pipe axis direction along the inner surface of the lining pipe, and a second running body that can run in the pipe axis direction along the inner surface of the lining pipe, the first running body and the second running body being arranged in the front-to-back direction, the second carriage has a third running body that can run in the pipe axis direction along the inner surface of the lining pipe, and a fourth running body that can run in the pipe axis direction along the inner surface of the lining pipe, the third running body and the fourth running body being arranged in the front-to-back direction, and at least one of the first running body, the second running body, the third running body and the fourth running body is a translating blade that can form an incision in the coating.

[0030] Furthermore, the specific structures (1) to (8) described above can also be adopted for the other incision forming devices. In this case, structure (1) may be provided with a pair of translating blades arranged side by side in the left-right direction. Structure (2) may be provided with a blade spacing adjustment mechanism that changes the spacing between the pair of translating blades. Structure (7) may be provided with the first and third running bodies arranged at the same positions in the front-rear and left-right directions, and the second and fourth running bodies arranged at the same positions in the front-rear and left-right directions. [Effects of the Invention]

[0031] The incision forming device according to the present invention allows the incision work of the coating to be carried out safely and with good workability.

[0032] Other objects, features, and advantages of the present invention will become apparent from the following detailed description of the preferred embodiments of the present invention, which is given with reference to the accompanying drawings. In the drawings, the same reference numerals indicate the same or corresponding parts. [Brief explanation of the drawings]

[0033] [Figure 1] FIG. 1 is a side view showing an incision forming device according to one embodiment of the present invention. [Figure 2] FIG. 2 is a front view showing the incision forming device according to the embodiment. [Figure 3] FIG. 3 is an enlarged plan view showing the incision forming device according to the embodiment. [Figure 4] FIG. 4 is a side view showing a state in which the incision forming device according to the embodiment is inserted into a lining pipe, with the lining pipe cut out perpendicularly and parallel to the pipe axis. [Figure 5] FIG. 5 is a side view showing the incision forming device according to the embodiment in use, with the lining pipe cut out perpendicularly and parallel to the pipe axis. [Figure 6] FIG. 6 is a front view showing the incision forming device according to the embodiment in use, with the lining pipe cut out vertically in a direction perpendicular to the pipe axis. [Figure 7] FIG. 7 is a longitudinal cross-sectional view showing a lining pipe in which multiple pairs of incisions have been formed using the incision forming device according to the embodiment, and the coating between each pair of incisions has been removed to form band-like incisions (the lining pipe is shown cut out perpendicularly and parallel to the pipe axis, but the lining pipe is shown rotated 90° around the pipe axis from the state shown in FIGS. 4 and 5). [Figure 8]FIG. 8 is a cross-sectional view showing a lining pipe in which multiple pairs of incisions have been formed using the incision forming device according to the embodiment, and the coating between each pair of incisions has been removed to form band-like incisions (the lining pipe is shown cut out vertically in a direction perpendicular to the pipe axis, but the lining pipe is shown rotated 90° around the pipe axis from the state shown in FIGS. 4 and 5). [Figure 9] FIG. 9 is a plan view showing a notch forming device according to a modified example of the embodiment. [Figure 10] FIG. 10 is a perspective view conceptually showing incisions formed by the incision forming device according to the modified example (a state in which a pair of incisions is formed and then the coating between each pair of incisions is removed to form band-shaped incisions). [Figure 11] FIG. 11 is a side view showing a notch forming device according to a further modified example of the embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0034] An incision forming device 11 according to one embodiment of the present invention will be described with reference to Figures 1 to 8. Note that in each figure, mutually orthogonal two-dimensional coordinates representing the up-down, left-right, and front-to-back directions are appropriately displayed, and the following description will be based on these directions. However, as already mentioned, the incision forming device 11 of the present invention and this embodiment (as well as the modified examples) can be used in various orientations, and the directions are used for the convenience of explanation, and the configuration of each part of the present invention is in no way limited by these directions. Furthermore, "height" refers to the position in the up-down direction.

[0035] 1 to 6, the incision forming device 11 according to this embodiment includes a device main body 12 having a vertically long rectangular parallelepiped shape, a first carriage 13 disposed at the upper end of the device main body 12, and a second carriage 14 disposed at the lower end of the device main body 12. The device main body 12 is formed by arranging two rail materials 12a, each made of a C-shaped steel (lip channel steel) or a channel steel (channel steel) having a plurality of elongated holes arranged in the longitudinal direction, facing each other in parallel.

[0036] The first carriage 13 has two rolling elements 15, each consisting of a pair of rotary blades 16 (16a, 16b), i.e., a first rolling element 15a and a second rolling element 15b, which are arranged in the front-to-rear direction. The pair of rotary blades 16 constituting each rolling element 15a, 15b is rotatably supported by a rotary shaft extending horizontally in the left-to-right direction at the upper end of the support head 17, and is arranged parallel to each other at the same height. Each rotary blade 16a, 16b has a disk shape and can roll (travel while rotating) on ​​the inner surface of the lining pipe 1. The second carriage 14 has two rolling elements 15 (a third rolling element 15c and a fourth rolling element 15d) arranged in the front-to-rear direction, and each rolling element 15c, 15d consists of a pair of rotary blades 16a, 16b.

[0037] The spacing between each pair of rotary blades 16a, 16b can be changed. Specifically, the spacing between each pair of rotary blades 16a, 16b can be changed by changing the number of washers 23 (see FIG. 3) interposed between the support head 17 and the rotary blade 16, or by replacing the washers 23 with washers (not shown) of a different thickness. Note that methods other than those described above may also be used to change the spacing between the pair of rotary blades 16a, 16b. For example, multiple types of support heads 17 or carriages 13, 14 with different spacings between the rotary blades 16a, 16b may be prepared and interchangeable.

[0038] The carriage support section that supports each carriage 13, 14 has an air cylinder 18 that supports each carriage 13, 14 so that it can move up and down, and a cylinder and air circuit (neither of which are shown) that supply air to these air cylinders 18. The air cylinder 18 is supported between the two rail members 12a by a support plate 19 and a thumbscrew 20 that secures the support plate 19 to an elongated hole in the rail member 12a, and by changing the fixed height of the support plate 19, it is possible to change the height position of the air cylinder 18 (and therefore of each carriage 13, 14 that is secured to the device main body 12 via the air cylinder 18).

[0039] A handle bar 22 is connected to the center of the device body 12 in the vertical direction via a handle bar support part 21. The handle bar 22 extends in the front-to-rear direction, and by pushing and pulling the handle bar 22, the device 11 can be moved (forward or backward) in the direction of the pipe axis 1a (front-to-rear direction).

[0040] The first and second carriages 13 and 14 are arranged at the same position in the front-to-rear direction, and the rolling elements 15 of these carriages 13, 14, specifically the first and third rolling elements 15a and 15c, and the second and fourth rolling elements 15b and 15d, are arranged at the same position in the front-to-rear and left-to-right directions, respectively. Therefore, when the first carriage 13 (first and second rolling elements 15a and 15b) and the second carriage 14 (third and fourth rolling elements 15c and 15d) are pressed against the inner surface of the lining pipe 1, the device body 12 is arranged vertically in a direction perpendicular to the pipe axis 1a (up-down direction), and the device 11 is arranged inside the lining pipe 1 so that the handle bar 22 extends horizontally in a direction perpendicular to the device body 12 (front-to-rear direction), and the device 11 can be stably moved within the pipe 1 by pushing or pulling the handle bar 22.

[0041] The method of using the device 11 is as follows.

[0042] First, as shown in Figure 4, the device 11 (device main body 12 and carts 13, 14) is inserted into the inside of the lining pipe 1. At this time, the rods of each air cylinder 18 are retracted to move each cart 13, 14 closer to the center of the device 11 (connection part of the handle bar 22), thereby reducing the height (vertical length) of the entire device.

[0043] After inserting the device 11 into the pipe 1, as shown in Figures 5 and 6, the air cylinders 18 are operated to extend the rods and press the carts 13, 14 against the inner surface of the lining pipe 1. Then, in this state, the handle bar 22 is used to advance the device 11 so as to push it deeper (rearward) into the lining pipe 1 (see arrow L). As the device 11 advances, the rotary blades 16 pressed against the inner surface of the pipe 1 roll (moving while rotating as if rolling on the inner surface of the pipe 1), cutting the coating 2. As a result, the rotary blades 16 cut the coating 2, and it is possible to form incisions (slits) 3 in the coating 2 in the direction of the pipe axis 1a.

[0044] 7 and 8 show a lined pipe 1 in which incisions 3 have been formed using the incision forming device 11 according to this embodiment. The incisions 3 shown in these figures are strip-shaped (band-shaped incisions with a certain width) incisions 3 formed by peeling off the coating 2 between a set (two) of cuts formed by a pair of rotary blades 16a, 16b. Forming such band-shaped incisions 3 makes it easier to peel off the coating 2 from the inner surface of the pipe.

[0045] 7 and 8, six band-shaped incisions 3 extending in the pipe axial direction are formed, but to form multiple incisions 3 like this (for example, four, six, eight, etc.), after the incision operation (traveling the device 11 from one end of the pipe 1 to the other), the lining pipe 1 or the device 11 can be rotated around the pipe axis 1a and the incision operation can be repeated. Also, the reference numeral 4 in Fig. 7 denotes an incision 4 extending in the pipe circumferential direction, which can be formed, for example, by a incision forming device separately proposed by the present applicant (Patent Application No. 2023-200698).

[0046] 9 shows a notch forming device 31 according to a modification of the above embodiment. As shown in this figure, the device 31 has carriages 13, 14 supported on the device body 12 so that they are angled (diagonally) relative to the front-to-rear direction, with the first carriage 13 installed on the device body 12 so as to extend diagonally rearward to the left when viewed from the front, and the second carriage 14 installed so as to extend diagonally rearward to the right when viewed from the front.

[0047] This device 31 forms the incision 3 by running in the direction of the pipe axis 1a inside the lining pipe 1, similar to the device 11 of the previous embodiment, but since each of the carriages 13, 14 is supported at an angle, this device 31 moves back and forth while rotating around the pipe axis 1a (handle bar 22 / not shown in Figure 9), unlike the device 11 of the previous embodiment.

[0048] FIG. 10 conceptually illustrates the incisions 5 formed by the present apparatus 31 (shown as strip-shaped incisions 3 in which the coating 2 between a pair of cuts has been removed, similar to the strip-shaped incisions 3 described in the previous embodiment). As shown in this figure, the present apparatus 31 can form spiral incisions 5 in the coating 2. For ease of understanding, FIG. 10 only illustrates the incisions 5 formed by one of the carriages (e.g., the first carriage 13). The incisions (not shown) formed by the other carriage (e.g., the second carriage 14) have a shape similar to the incisions 5 formed by one of the carriages (e.g., the first carriage 13) shown in FIG. 10, but have a pattern obtained by rotating the incisions 5 (the incisions 5 formed by the first carriage 13) 180 degrees around the tube axis 1a.

[0049] The device 31 according to the above modification has the advantage that the incision forming operation can be completed in a single operation of running the device 31 from one end of the pipe 1 to the other. That is, with the device 11 according to the above embodiment, to form, for example, six incisions (six sets of incisions) 3, the operation of running the device 11 from one end of the pipe 1 to the other must be repeated three times (the more incisions 3, the easier it is to peel the entire coating 2 inside the pipe 1). Even to form four incisions (four sets of incisions) 3, the running operation must be repeated twice. In contrast, the device 31 according to the above modification can form two spiral incisions 5 in a single running operation. With such spiral incisions 5, it becomes possible to achieve the same ease of peeling the coating 2 as when four to six linear incisions 3 are formed with the device 11 according to the above embodiment.

[0050] 11 shows another modified example of the incision forming device 11 according to the embodiment. The incision forming device 41 shown in this figure is equipped with a translating blade 24 instead of the rotary blade 16. The translating blade 24 is a plate-shaped blade that cuts the coating by moving linearly without rotating. This type of device 41 can also form the incisions 3 and 5. The incision forming device 31 according to the modified example can also be equipped with a translating blade 24 instead of the rotary blade 16.

[0051] In the example shown in FIG. 11, all of the running bodies provided on the first carriage 13 and the second carriage 14 are translating blades 24, but it is also possible for some to be equipped with translating blades 24 and the others to be equipped with rotating blades 16 or rolling bodies such as rollers or tires (i.e., a structure in which translating blades 24 and rotating blades 16 or rolling bodies such as rollers or tires are mixed). [Explanation of symbols]

[0052] 1. Lined pipe 1a Tube shaft 2 Coating 3. Cutting in the axial direction of the tube (a strip-shaped cut that removes the coating between two cuts made by a pair of rotary blades) 4. Band-shaped cuts around the pipe 5 Spiral cut 11,31,41 Notch forming device 12 Device body 12a rail material 13 First bogie 14 Second bogie 15 Rolling elements 15a First rolling element (pair of rotary blades) 15b Second rolling element (pair of rotary blades) 15c Third rolling element (pair of rotating blades) 15d Fourth rolling element (pair of rotating blades) 16(16a,16b) Rotary blade 17 Support Head 18 Air Cylinder 19 Support plate 20 Thumb screws 21 Handle bar support 22 Handle bar 23 Washer 24 Translation blade

Claims

1. An incision forming device that is disposed inside a lining pipe so as to extend in a pipe diameter direction and travels in a pipe axial direction to form an incision in a coating formed on an inner surface of the lining pipe, When one side in the tube axis direction is the front, the other side in the tube axis direction is the rear, one side in the tube diameter direction is the top, and the other side in the tube diameter direction is the bottom, an apparatus main body that can be placed inside the lining pipe so as to extend in the vertical direction; a first carriage provided at an upper end of the device body; a second carriage provided at a lower end of the device body; and The first carriage is a wheel-shaped first rolling element that can travel in the pipe axial direction by rolling on the inner surface of the lining pipe; a wheel-shaped second rolling element that can travel in the pipe axial direction by rolling on the inner surface of the lining pipe; and The first rolling element and the second rolling element are arranged in a front-rear direction, The second carriage is a third rolling element in the form of a wheel that can travel in the axial direction of the lining pipe by rolling on the inner surface of the lining pipe; a fourth rolling element in the form of a wheel that can travel in the axial direction of the lining pipe by rolling on the inner surface of the lining pipe; and The third rolling element and the fourth rolling element are arranged in the front-rear direction, At least one of the first rolling element, the second rolling element, the third rolling element, and the fourth rolling element is a disk-shaped rotary blade capable of forming a cut in the coating. A notch forming device characterized by:

2. When the direction perpendicular to the front-back and up-down directions is defined as the left-right direction, The rotary blade is provided with a pair of rotary blades arranged side by side in the left-right direction. The incision forming device according to claim 1 .

3. The rotary blades further include a blade distance adjustment mechanism for changing the distance between the pair of rotary blades. The incision forming device according to claim 2 .

4. An incision forming device that is disposed inside a lining pipe so as to extend in a pipe diameter direction and travels in a pipe axial direction to form an incision in a coating formed on an inner surface of the lining pipe, When one side in the tube axis direction is the front, the other side in the tube axis direction is the rear, one side in the tube diameter direction is the top, and the other side in the tube diameter direction is the bottom, an apparatus main body that can be placed inside the lining pipe so as to extend in the vertical direction; a first carriage provided at an upper end of the device body; a second carriage provided at a lower end of the device body; and The first carriage is a first running body that can run along the inner surface of the lining pipe in the pipe axial direction; a second running body that can run along the inner surface of the lining pipe in the pipe axial direction; and The first traveling body and the second traveling body are arranged in a front-rear direction, The second carriage is a third running body that can run along the inner surface of the lining pipe in the pipe axial direction; a fourth running body that can run along the inner surface of the lining pipe in the pipe axial direction; and The third traveling body and the fourth traveling body are arranged in a front-rear direction, At least one of the first running body, the second running body, the third running body, and the fourth running body is a translating blade capable of forming a cut in the coating. A notch forming device characterized by:

5. When the direction perpendicular to the front-back and up-down directions is defined as the left-right direction, The translating blades include a pair of translating blades arranged side by side in the left-right direction. The incision forming device according to claim 4.

6. The blade adjustment mechanism further includes a blade interval adjustment mechanism for adjusting the interval between the pair of translation blades. The incision forming device according to claim 5 .

7. a carriage support portion that supports at least one of the first carriage and the second carriage so that the position in the vertical direction can be changed; The incision forming device according to any one of claims 1 to 6, comprising:

8. The carriage support portion biases the carriage supported by the carriage support portion toward the inner surface of the lining pipe. The incision forming device according to claim 7.

9. The carriage support unit has an air cylinder that supports the carriage supported by the carriage support unit so that the position of the carriage supported by the carriage support unit can be changed in the vertical direction. The incision forming device according to claim 8.

10. a cylinder filled with air for driving the air cylinder; an air circuit that supplies air filled in the cylinder to the air cylinder and switches the driving direction of the air cylinder in the up and down direction; Further having The incision forming device according to claim 9.

11. the first rolling element and the third rolling element are disposed at the same position in the front-rear direction and the left-right direction, The second rolling element and the fourth rolling element are disposed at the same position in the front-rear direction and the left-right direction. The incision forming device according to claim 1 .

12. the first traveling body and the third traveling body are disposed at the same position in the front-rear direction and the left-right direction, The second traveling body and the fourth traveling body are disposed at the same position in the front-rear direction and the left-right direction. The incision forming device according to claim 4.

13. A rod-shaped handle bar is provided for driving the first carriage and the second carriage. The incision forming device according to claim 1 or 4.

Images