JP2007020609A - System and method for treating inner surface of cylindrical structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a system and a method for treating an inner surface easily and inexpensively which facilitates safe treatment of an inner surface of a slanting cylindrical structure without setting up a large scaffold within the cylindrical structure and allows a worker to perform a sufficient treatment of the inner surface. <P>SOLUTION: The system 10 for treating an inner surface is used for performing a rustproof treatment on the inner surface of a slanting iron water pipe 100. The system comprises an extending rope 11 which is fixed on the upper part of the iron water pipe and extends to the lower part, a chuck 12 which locks the extending rope unslidably and engages with the extending rope slidably by gripping, a work strap 13 connected to the extending rope 11 via the chuck 12 for holding a worker in a working position, a sandblasting device 14 for performing sandblasting on the inner surface of the iron water pipe 100, and an air supply device 15 for supplying fresh air into a draping cover 45 of the worker. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an inner surface processing system and an inner surface processing operation method for a cylindrical structure, and more specifically, an inner surface processing operation of a cylindrical structure extending in an inclined posture is easily and safely performed at low cost. About things that can be done.

Conventionally, in the same manner as when processing the outer surface of a structure, when performing rust prevention processing or the like on the inner surface of the structure, a scaffold is built as a working system in the structure. . The scaffold is assembled in the vicinity of the inner surface of the structure to be treated such as rust removal or painting, for example, at a distance that can be reached by an operator (see, for example, Patent Document 1).
JP-A-10-121747

  However, in the scaffold of such a conventional work system, for example, when the anticorrosion treatment is applied to the inner surface of the water channel iron pipe through which water for hydroelectric power generation is distributed, the inner surface of the water channel iron pipe is aligned. Need to build a scaffold. If this canal iron pipe is constructed in a long section and a scaffold is built over the entire length of the canal iron pipe, it becomes a large-scale scaffold and is too expensive.

  Also, if a scaffold is built in such a water pipe, sufficient processing cannot be applied to the part hidden by the scaffold. For example, the place where the scaffold is applied only three times. Finally, it is applied once while removing, and there is a risk of rusting from there.

  Therefore, the present invention can perform sufficient treatment on the inner surface so that the inner surface can be easily and safely processed without assembling a large-scale scaffold in the inclined cylindrical structure. It is an object of the present invention to provide a simple and inexpensive internal working system and working method.

  1st invention of the inner surface processing work system of the cylindrical structure which solves the said subject is an inner surface processing work system used when processing the inner surface of the cylindrical structure extended in the inclination attitude | position, A linear member having a predetermined strength or more that is fixed to the upper part of the cylindrical structure and extended to the lower part, and a holding device that is connected to the linear member and holds the worker at the work position so that the work can be performed. And a processing device that performs a desired process on the inner surface of the cylindrical structure.

  In this invention, an operator who handles a processing apparatus is inclined only by passing a linear member such as a rope or a chain from the upper part to the lower part in the inclined cylindrical structure and connecting the holding device to the linear member. The inner surface can be processed by being held at the work position in the cylindrical structure, and the inner surface can be processed over the entire length of the cylindrical structure while moving the connecting position. Accordingly, a desired treatment can be applied to the inner surface from the upper part to the lower part without forming a large-scale scaffold from the upper part to the lower part, and conversely, even in a narrow cylindrical structure where the scaffold cannot be assembled.

  In addition to the specific matter of the first invention, the second invention of the cylindrical structure inner surface processing work system that solves the above-mentioned problems is such that the holding device is engaged with the linear member so as not to be detached, and the pulling direction. Connecting to the linear member via an engagement device that restricts sliding in one direction or both directions in the extending direction of the linear member by restricting the movement to a predetermined direction and continuing the predetermined operation. It is a feature.

  According to the present invention, the linear member passed from the upper part to the lower part in the cylindrical structure cannot be detached, and as it is, it is slidably engaged in the pulling direction, that is, the descending direction, so that the worker is brought into the working position. On the other hand, the operator can move the work position while permitting sliding in the descending direction without being disengaged, for example, by continuing the operation such as continuing to hold and holding the connection. Therefore, even if the operator connected to and held by the linear member shifts the work position, for example, even if he / she misses gripping, further sliding in the pulling direction is restricted. The inner surface of the cylindrical structure that is held in its position without falling and that is inclined while ensuring safety can be easily moved to perform processing on the inner surface thereof.

  In addition to the specific matter of the first or second invention, the third invention of the inner surface processing work system for a cylindrical structure that solves the above problems is characterized in that the holding device is one of the buttocks or the trunk of the operator or It has a holding part which holds both.

  In this invention, the holding device connected to the linear member passed from the upper part to the lower part in the cylindrical structure holds the buttocks and the trunk of the worker. Therefore, the worker can hold the buttocks and the torso at the work position in the cylindrical structure, and can perform the processing work on the inner surface using both hands freely.

  In addition to the specific matter of any one of the first to third aspects of the invention, the fourth invention of the inner surface processing work system for a cylindrical structure that solves the above-described problems is characterized in that the processing device is applied to the inner surface of the cylindrical structure. It is a sand blasting apparatus for performing the pre-treatment, or a coating apparatus for coating the inner surface of the cylindrical structure.

  In this invention, it is possible to perform a pretreatment such as sandblasting the inner surface of the cylindrical structure to remove the coating, or coating the inner surface while shifting the linear member. Therefore, a high quality rust prevention process etc. can be given to the inner surface of a cylindrical structure.

  In addition to the specific matter of any one of the first to fourth aspects of the invention, the fifth invention of the cylindrical structure inner surface processing work system that solves the above-mentioned problems is that the worker breathes without relying on the surrounding air. It is characterized by including an air supply device for supplying clean air as much as possible.

  In the present invention, when the inner surface treatment is performed inside the cylindrical structure, the treatment work can be performed by receiving a supply of clean air. Therefore, it is possible to work without the need for air in the cylindrical structure, for example, to work by sucking the air in the cylindrical structure, such as when sandblasting or painting treatment is applied to the inner surface Can work with peace of mind even in environments where it is impossible or difficult.

  In addition to the specific matters of the fifth invention, the sixth invention of the inner surface processing work system for a cylindrical structure that solves the above-described problems is characterized in that the air supply device secures the front field of view while ensuring the front field of view. And a supply tube that is connected to the head mounting portion and supplies clean air.

  In the present invention, clean air is supplied into the mounting portion that covers the head while ensuring a field of view so as to enable work. Therefore, the worker can work while the entire head is shielded from the surrounding environment, and can work safely without being affected by the surrounding environment, for example, fine powder or vaporized chemical agent. Can do.

  1st invention of the inner surface processing operation method of the cylindrical structure which solves the said subject is an inner surface processing operation method of the cylindrical structure at the time of performing the processing operation of the inner surface of the cylindrical structure extended in the inclination attitude | position, A linear member having a length greater than or equal to a predetermined length from the upper part to the lower part of the cylindrical structure, and restricting the linear member from detachably engaging and retracting in the pulling direction and performing a predetermined operation The engagement device that allows the linear member to slide in one or both directions in the extending direction of the linear member by continuation, and the operator is connected to the engagement device to hold the operator in the working position freely. And a processing device for performing a desired treatment on the inner surface of the cylindrical structure, and after fixing the linear member to the upper part in the cylindrical structure and extending it to the lower part, the cylindrical structure The holding device is connected to the upper linear member through the engagement device. The contractor is held at the work position, and thereafter, the processing device starts processing the inner surface of the cylindrical structure. Then, each time the processing work applied to the inner surface of the cylindrical structure at the work position is completed, the engagement device is turned on. It is characterized by repeating descending while sliding downward to the lower part of the cylindrical structure.

  In this invention, an operator who handles a processing apparatus is inclined only by passing a linear member such as a rope or a chain from the upper part to the lower part in the inclined cylindrical structure and connecting the holding device to the linear member. Both hands can be freely held at the work position in the cylindrical structure, and the inner surface can be processed, and the inner surface can be processed over the entire length of the cylindrical structure while moving the connecting position. be able to. At the time of this work, it is impossible to detach, and as it is, it engages with the linear member so that it cannot slide in the pulling direction, that is, the descending direction, and the operator is connected and held at the work position. The operator can move the work position by allowing the slide in the descending direction without being disengaged by continuing. Therefore, a desired treatment is applied to the inner surface from the upper part to the lower part of the cylindrical structure without forming a large-scale scaffold from the upper part to the lower part, and conversely, even in a narrow cylindrical structure in which the scaffold cannot be assembled. be able to. In addition, when the operator connected to and held by the linear member makes a mistake in an operation such as, for example, losing grip when moving the work position, the worker slides further (descends) by sliding further in the pulling direction. Is limited and held in that position without falling. Therefore, the inside of the inclined cylindrical structure can be easily moved while ensuring safety, and the inner surface can be comfortably processed.

  In addition to the specific matter of the first invention, the second invention of the cylindrical structure inner surface processing work method that solves the above-mentioned problems is a sandblasting apparatus that performs pretreatment for coating the inner surface of the cylindrical structure as the processing apparatus. Alternatively, a coating apparatus for coating the inner surface of the cylindrical structure is prepared, and sandblasting or coating processing is performed from the upper part to the lower inner surface in the cylindrical structure.

  In this invention, it is possible to perform a pretreatment such as sandblasting the inner surface of the cylindrical structure to remove the coating, or coating the inner surface while shifting the linear member. Therefore, a high quality rust prevention process etc. can be given to the inner surface of a cylindrical structure.

  In addition to the specific matter of the first or second invention described above, the third invention of the cylindrical structure inner surface treating method for solving the above-mentioned problems is clean so that the worker can breathe without depending on the surrounding air. An air supply device for supplying air is prepared, and clean air is supplied from the air supply device to the operator when the inner surface treatment of the cylindrical structure is performed by the treatment device.

  In the present invention, when the inner surface treatment is performed inside the cylindrical structure, the treatment work can be performed by receiving a supply of clean air. Therefore, it is possible to work without the need for air in the cylindrical structure, for example, to work by sucking the air in the cylindrical structure, such as when sandblasting or painting treatment is applied to the inner surface Can work with peace of mind even in environments where it is impossible or difficult.

  As described above, according to the present invention, it is only necessary to pass a linear member such as a rope or a chain from an upper part to a lower part in an inclined cylindrical structure, and to connect an apparatus for holding an operator to the inside of the cylindrical structure. The inner surface processing operation can be performed while moving. At this time, the operator is connected to the linear member through the engaging device that allows the slide to be engaged only after the operation such as the gripping is continued and the gripping operation is continued, so that the operator does not fall down due to a work mistake. Can move safely and change working position. Therefore, it is possible to easily and safely perform the inner surface treatment work in a narrow cylindrical structure in which a scaffold cannot be assembled without forming a large-scale scaffold from the upper part to the lower part in the cylindrical structure. The high-quality treatment can be applied to the inner surface of the cylindrical structure without the linear member interfering with the inner surface treatment.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, the best embodiment of the invention will be described based on the drawings. 1-4 is a figure which shows one Embodiment of the system for the inner surface treatment work which performs the inner surface treatment work method of the cylindrical structure which concerns on this invention.

  First, the system configuration will be described. In FIG. 1, an inner surface processing work system 10 for a cylindrical structure includes an extended rope (linear member) 11, a chuck 12, a work band 13, a sandblasting device and a coating device (processing device) 14, and an air supply. For example, the inner surface of a hydroelectric iron pipe (structure) 100 for a hydroelectric power generation having a cylindrical shape (circular cross section) installed in a posture inclined on a slope in a mountainous area is repainted. When carrying out rust prevention treatment (inner surface treatment), use a sand blasting device when pre-treating to remove rust on the inner surface, or switch to a coating device when painting and comfortably prevent rust. Processing can be performed. In the figure, a sandblasting device is shown.

  The extension rope 11 has at least a length of the water channel iron pipe 100 and is fixed to the upper part of the water channel iron pipe 100 so as to extend to the lower part, and is sufficiently retained even when the operator puts the weight. It has the strength that can be done.

  The chuck 12 is, for example, Lolip (registered trademark) manufactured by Fujisho Management Co., Ltd., and as shown in FIG. 2 (a), the extension thereof can be slid in the extending direction of the extending rope 11. A main body 21 that houses the rope 11, a gripping part 22 that is supported in parallel so that it can be gripped together with the main body 21, and a rotation shaft disposed on each of the main body 21 and the gripping part 22. A pair of support plates 23 that are rotatably connected to 21a and 22a and support the gripping portion 22 in a posture parallel to the main body portion 21, and a rotation shaft 22a on one end side of the gripping portion 22. And a support lever 25 connected to one support plate 23 so as to be coaxially rotatable and to which a connection rope 24 is attached. The chuck 12 can be used as a safety tool for working at high places.

  Specifically, as shown in FIG. 2B, the main body portion 21 of the chuck 12 has a cylindrical portion 21b having the same diameter as the extending rope 11 defined on the lower side, and this cylindrical portion 21b. Inside, the extended rope 11 can be slidably mounted and connected in an engaged state. A bottom portion 21c is rotatably supported on the main body portion 21 by a hinge portion 21d on the back side in the drawing, and the cylindrical portion 21b can be opened and closed by rotating the bottom portion 21c. The extended rope 11 can be easily fitted and engaged.

  The main body 11 is integrally formed with a female screw portion 21e on the front side in the figure, while a male screw 26 is rotatably held on the bottom surface portion 21c. The male screw 26 is attached to the female screw 21e. By screwing, the cylindrical portion 21b can be locked in the closed state. Furthermore, the main body portion 21 and the bottom surface portion 21c are respectively welded with two divided cylindrical portions 21f and 21g, and a columnar lock member 27 with a lever 27a is slidably mounted therein, The columnar lock member 27 is urged by an urging means (not shown) so as to protrude and lock from the divided cylindrical portion 21g toward the divided cylindrical portion 21f. The columnar lock member 27 is maintained in a state of being released from the divided cylindrical portion 21f (unlocked state) by causing the lever 27a to enter a circumferential groove 21h engraved on the peripheral surface of the divided cylindrical portion 21g. can do.

  As a result, the chuck 12 advances its columnar shape for the first time by advancing the lever 27a of the columnar lock member 27 of the main body portion 21 against the biasing force of the biasing means toward the groove 21h side of the split cylindrical portion 21g. The locking member 27 can be pulled out of the divided cylindrical portion 21f so that the cylindrical portion 21b can be opened and closed. Even if the male screw 26 is loosely loosened, the cylindrical portion 21b is released (disengaged). ) And the extended rope 11 is not detached.

  Further, the support plate 23 of the chuck 12 is provided with an engaging portion 28 that rotates integrally and protrudes and retracts into the cylindrical portion 21 b of the main body portion 21. The support plate 23 is connected to the grip portion 22. In a state in which the engagement portion 28 is not gripped, the engagement portion 28 is urged by an urging means (not shown) so as to protrude into the cylindrical portion 21b, thereby engaging the saw blade-shaped engagement formed at the tip portion. Stopper tooth 28a is pressed so that extension rope 11 in cylindrical part 21b may be locked so that it cannot slide. On the other hand, the support plate 23 has a traction direction by the connecting lever 25 against the urging force of the urging means as shown by an arrow in FIG. When approaching the main body 21 while sliding in the right direction on the opposite side, the engaging portion 28 is rotated in the clockwise direction in the drawing to retract from the inside of the cylindrical portion 21b, thereby engaging the extended rope 11. Release the stop and make it slidable. In other words, the locking portion 28 is pressed against the extended rope 11 when the support plate 23 is rotated in the pulling direction by the connecting lever 25, and restricts relative movement with respect to the extended rope 11. Thus, the locking teeth 28a are formed.

  As a result, the chuck 12 can fix the coupling position by pressing the locking portion 28 of the support plate 23 against the extending rope 11 in a natural state and restricting sliding to the coupling lever 25 side. When the portion 22 is gripped and brought close to the main body portion 21, the pushing position of the locking portion 28 is released, and the connecting position is moved by allowing it to slide relative to the extended rope 11. Can be made. In short, in this chuck 12, even if the connecting rope 24 attached to the connecting lever 25 is pulled, the gripping portion 22 pulls in the direction in which the locking portion 28 of the support plate 23 protrudes into the cylindrical portion 21b of the main body portion 21. Therefore, sliding in the pulling direction is limited.

  That is, the chuck 12 makes the pulling direction of the connecting rope 24 the descent direction in the water channel iron pipe 100 and engages the extended rope 11 so as not to be detached. While restricting sliding and retreating (lowering), an engaging device that allows sliding on the extended rope 11 for the first time is configured by maintaining the gripping state of the gripping portion 22. . The chuck 12 is designed such that when the connecting lever 25 is pulled in the pulling direction, the locking portion 28 of the support plate 23 rotates in a direction that meshes with the extending rope 11 in the cylindrical portion 21b. Therefore, when pushed in the opposite direction, the locking portion 28 substantially allows the sliding surface of the extended rope 11 to slide.

  As shown in FIG. 3, the work band 13 is made up of a body-wound belt 31 that is wound around the body of the worker, and a wide buttocks belt 32 that is suspended so as to be parallel to the body-wound belt 31. A first ring 33 is attached to the waist belt 31 so as to be positioned on the side of the worker, and a second ring 34 is attached to each of the both ends of the buttocks belt 32. Then, the first and second rings 33 and 34 of the work band 13 are hooked with hooks 35 (hook-shaped portions 35 a) shown in FIG. 4 at the tip of the connecting rope 24 attached to the connecting lever 25 of the chuck 12. Can do.

  Thus, by hooking the hook 35 to the first ring 33 of the work band 13, the operator's trunk can be connected to the lifeline (not shown) via the chuck 12, and the operator is held. Falling can be prevented. In addition, the second ring 34 of the work band 13 has two tip end portions of the two connecting ropes 24 attached to the connecting lever 25 of the chuck 12 different from the body side (the connecting rope 24 passed through the connecting lever 25 is connected). By hooking the hooks 35 at both ends, the operator's buttocks can be connected to the extended rope 11 via the chuck 12, and the operator's buttocks can be held from both sides at the working position. The free working posture of both hands can be maintained. That is, the work band 13 constitutes a holding portion, and constitutes a holding device together with the plurality of chucks 12.

  Here, the hook 35 is rotatably supported by a rotation shaft 36a disposed on the base side of the hook-shaped portion 35a, and is not shown in a direction approaching the tip from the inside of the hook-shaped portion 35a. The opening / closing lever 36 urged by the urging means and the rotation shaft 37a disposed at the intermediate portion of the hook-shaped portion 35a are pivotally supported so as to be able to rotate within the opening / closing lever 36. And a stopper 37 that is urged by a biasing means (not shown) so as to rotate in one direction, and a stopper 37b of the stopper 37 is rotated in one direction on the open / close lever 36. A penetrating bar 36b whose position overlaps with the turning trajectory is provided. As a result, the hook 35 simply presses the open / close lever 36 against the first and second rings 33 and 34 by pressing the base 37c on the opposite side of the stopper 37b across the rotation shaft 37a of the stopper 37. The first and second rings 33 and 34 are caused to enter the hook-shaped portion 35a by disengaging the stop portion 37b of the 37 from the rotation trajectory of the through rod 36b and enabling the opening / closing lever 36 to rotate. be able to. On the other hand, as long as the hook 35 does not further rotate the opening / closing lever 36 after intentionally rotating the stopper 37 to remove the stopper (stopper) by the blocking portion 37b of the penetrating bar 36b of the opening / closing lever 36, The first and second rings 33 and 34 cannot be detached from the hook-shaped portion 35a. Therefore, the hook 35 is not inadvertently detached from the first and second rings 33 and 34, and the work can be performed safely and with peace of mind.

  The sandblasting device 14 includes a sand hose 41 that pumps sand by compressed air generated by a compressor (not shown), and a nozzle 42 that is attached to the tip of the sand hose 41 and controls jetting / stopping of the sand that is pumped. For example, by spraying sand onto the painted surface with high pressure, the old paint can be peeled off to make it clean and the pretreatment of the anticorrosive coating can be done easily and quickly. Can be done. In addition, since the coating apparatus is comprised by the hose which supplies a coating material, and the nozzle which injects and stops the coating material similarly to this sandblasting apparatus, detailed description here is abbreviate | omitted.

  The air supply device 15 is provided on the head of the covering cover 45 so as not to obstruct the operator's field of view so as not to obstruct the worker's field of view. A viewing window 46 that is connected to the inside of the covering cover 45 and a supply tube 47 that circulates clean air from an air supply device (not shown) and jets it into the covering cover 45. The operator can work by breathing with the air in the covering cover 45 without depending on the air in the water channel iron pipe 100.

  Next, an operation method of preparing the cylindrical structure inner surface processing system 10 will be described. First, the extended rope 11, chuck 12, work band 13, sand blasting device 14 (sand hose 41, nozzle 42), and air supply device 15 (covering cover 45, supply tube) of the inner surface processing work system 10 of the cylindrical structure. 47) is prepared.

  After that, the extension rope 11 and a lifeline (not shown) are fixed to an entrance (not shown) installed at the upper part of the water channel iron pipe 100 and are inserted into and lowered into the water channel iron pipe 100 to be installed at the lower part thereof. The extending rope 11 is extended to a doorway (not shown). Next, a sand hose 41 of the sandblasting device 14 or a supply tube of the air supply device 15 is attached to the tip of a rope (not shown) that has been thrown in and lowered in the same manner as the extended rope 11 (the extended rope 11 may be used). The tip end portion of the sand hose 41 and the supply tube 47 is pulled out from the upper entrance / exit by connecting the tip end portion of the 47 temporarily and introducing and pulling it up from the lower entrance / exit of the water pipe 100. Next, the air supply device 15 is assembled by connecting the supply tube 47 drawn to the covering cover 45 worn by the worker, and the sand hose 41 drawn to the nozzle 42 held by the worker is connected to the sand blast device 14. Assemble.

  On the other hand, the operator winds the waist belt 31 of the work band 13 and fastens and fixes it to the body portion, and the first and second rings 33 and 34 of the waist belt 31 and the buttocks belt 32 of the work band 13. The hook 35 at the tip of the connecting rope 24 attached to the connecting lever 25 of the chuck 12 is hooked. In addition, the cylinder 11 of the main body 21 of the chuck 12 connected to the second ring 34 of the butting belt 32 of the work band 13 by temporarily pulling out the extended rope 11 and the upper end side of the lifeline from the entrance of the upper part of the water channel iron pipe 100. In the cylindrical portion 21b of the main body portion 21 of the chuck 12 connected to the extended ring 11 in the portion 21b and to the first ring 33 of the waist belt 31 of the work band 13, a lifeline is incorporated so that it cannot be detached. Engage and connect. At this time, the chuck 12 is engaged in a posture in which the connecting lever 25 becomes the lower end side of the extending rope 11.

  After the above preparation is completed, the sandblasting device 14 and the air supply device 15 are operated, and the worker enters the water channel iron pipe 100 from the upper entrance and exits, as shown in FIG. Thus, the work posture in which the weight is applied to the buttocks resting belt 32 of the work band 13 is adopted. At this time, the work band 13 is connected to the extended rope 11 via the chuck 12, and the chuck 12 is pulled in the direction of the connecting lever 25, and is fixed to the extended position so as not to slide on the extended rope 11. Therefore, the operator can work freely using both hands without assembling a scaffold in the water channel iron pipe 100 (even in a narrow case where the scaffold cannot be assembled).

  Then, the operator confirms the state of the inner surface of the water channel iron pipe 100 through the observation window 46 while breathing with clean air in the covering cover 45 sent from the supply tube 47 of the air supply device 15, and then the sandblasting device 14. By operating the nozzle 42 and blowing sand pressure-fed from the sand hose 41 onto the inner surface of the water channel iron pipe 100 at a high pressure, the old paint on the inner surface is peeled off to make it clean. Thus, the operator can safely and safely suck the fine powder of sand accompanying the sand blasting treatment and the chemical during the subsequent painting without requiring air in the water channel iron pipe 100. The pre-treatment before painting in front of the work position fixed by the chuck 12 can be easily performed while keeping the easy posture held by the work band 13 while breathing easily.

  After the paint on the inner surface of the water channel iron pipe 100 in front of the work position is peeled off, the grip part 22 of the chuck 12 connected to the first ring 33 of the waist belt 31 of the work band 13 is gripped together with the main body part 21 (the grip part 22 is removed). In the state where the locking portion 28 (the locking claw 28a) that has been locked to the extending rope 11 in the cylindrical portion 21b of the chuck 12 so as not to slide is released. The position where the extended rope 11 is engaged is shifted to the next lower working position, and the chuck 12 is released. At this time, the chuck 12 is locked (coupled) in a non-slidable manner by causing the gripping portion 22 to be separated from the main body portion 21 and projecting the locking portion 28 into the cylindrical portion 21 b and pressing it against the extending rope 11. After this, the position at which the chuck 12 connected to the second ring 34 of the butting belt 32 of the work band 13 engages and connects to the extended rope 11 is similarly shifted to the vicinity of the next lower work position and cannot slide. To lock. Here, when the position connected to the extended rope 11 cannot be shifted by a single operation, the operation of shifting the chucks 12 one by one is never repeated at the same time, so that a desired connection position can be obtained. To prevent it from sliding. Thereby, even if the chuck 12 connected to the extended rope 11 is only gripped, or if it is not gripped, the operator can be held in the work band 13 connected via any one of the chucks 12. The operation in the water channel iron pipe 100 can be repeated while moving the connecting position easily and safely without falling.

  Thereafter, similarly, the worker breathes with clean air in the covering cover 45 of the air supply device 15 and has an easy posture held by the work belt 13 connected to the extended rope 11 via the chuck 12. The pre-coating process such as peeling the old paint on the inner surface of the water channel iron pipe 100 by the sandblasting device 14 is performed, and the working position for locking (connecting) the chuck 12 to the extended rope 11 in a non-slidable manner is set downward. The old paint is peeled off from the entire inner surface of the water channel iron pipe 100 by repeating the lowering and shifting. At this time, there is only a linear member such as the extended rope 11 in front of the worker, that is, at the place where the inner surface of the water channel iron pipe 100 is operated. For example, a sandblasting process such as a scaffold is obstructed. Therefore, the pretreatment for stripping the old paint from the inner surface of the water channel iron pipe 100 can be easily and uniformly performed by slightly shifting the extended rope 11 and the like.

  Next, the operator exits from the lower iron / iron pipe 100 through the lower inlet / outlet and returns to the upper / lower inlet / outlet, changes the nozzle 42 of the sandblasting device 14 to a nozzle that ejects only compressed air, and similarly, By blowing compressed air on the inner surface, the operation of blowing the remaining sand downward is repeated to clean the inner surface of the water channel iron pipe 100 so that a new coating can be made.

  Next, the worker exits from the lower iron entrance through the lower iron entrance, returns to the upper entrance, changes the nozzle to the coating apparatus, and sprays the paint on the inner surface of the aqueous iron pipe 100 in the same manner, thereby making the canal iron pipe. Newly paint the inner surface of 100. This painting operation is repeated about three times after the painted paint has dried. At this time, as in the case of the sandblast treatment, only the linear member such as the extended rope 11 is present at the place to be coated on the inner surface of the water channel iron pipe 100 in front of the operator. It is easy to evenly displace the extension rope 11 and so on, without disturbing the painting process and leaving the part that can be painted only when the last scaffold is removed, resulting in uneven coating quality. The coating can be applied by spraying the inner surface of the iron pipe 100, and the entire surface can be coated with high quality and uniformity.

  Here, when performing these operations, the male screw 26 of the bottom surface portion 21c that closes the cylindrical portion 21b of the chuck 12 that puts the extended rope 11 and the lifeline into an interior state rotates to rotate the main body 21 side. Even if the threaded engagement with the female screw portion 21e is loosened, the columnar lock member 27 passes through the divided cylindrical portions 21f and 21g welded to the main body portion 21 and the bottom surface portion 21c, and the bottom surface portion 21c is opened. Restrict. Thus, the operator can continue the work without inadvertently removing the extended rope 11 and the lifeline from the chuck 12, and the posture is set by the buttocks belt 32 of the work band 13 that connects the chuck 12. In addition, it is possible to perform the work in the water channel iron pipe 100 safely and easily because it is prevented from falling by the trunk belt 31.

  As described above, in this embodiment, the extending rope 11 (including the lifeline) is passed from the upper part to the lower part in the inclined water pipe 100, and the chuck 12 having the work band 13 connected to the extending rope 11 is engaged. Just by engaging and locking, while holding the worker in a stable posture on the buttocks belt 32 of the work band 13, at the same time, while preventing the operator from falling on the waist belt 31 of the work band 13, The chuck 12 can be moved by simply grasping the chuck 12, and the inner surface of the water channel iron pipe 100 can be subjected to sandblasting or painting. Therefore, a high quality is not formed on the inner surface of the water channel iron pipe 100 without forming a large-scale scaffold from the upper part to the lower part in the inclined water pipe iron pipe 100, and also in the water channel iron pipe 100 having no space enough to form the scaffold. Rust prevention treatment can be safely and easily performed at low cost.

  Although one embodiment of the present invention has been described so far, it is needless to say that the present invention is not limited to the above-described embodiment, and may be implemented in various forms within the scope of the technical idea.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows one Embodiment of the inner surface treatment work system which performs the inner surface treatment work method of the cylindrical structure which concerns on this invention, and is a side elevation which shows the general | schematic whole structure. It is a figure which shows the apparatus structure of the principal part structure, (a) is a top view at the time of the use, (b) is a top view in the open state explaining the function. It is a top view which shows the apparatus structure of the principal part structure. It is a top view which shows the apparatus structure of the principal part structure.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Inner surface treatment work system 11 Extension rope 12 Chuck 13 Work zone 14 Sand blasting device 15 Air supply device 21 Main body part 22 Grasping part 21b Cylindrical part 21c Bottom part 24 Connecting rope 25 Connecting lever 28 Locking part 28a Locking claw 31 Belt 32 Bump belt 33, 34 Ring 35 Hook 41 Sand hose 42 Nozzle 45 Cover cover 46 Viewing window 100 Waterway iron pipe

Claims (9)

An inner surface treatment work system for a cylindrical structure used when the inner surface of a tubular structure extending in an inclined posture is processed.
A linear member having a predetermined strength or more that is fixed to the upper part in the cylindrical structure and extended to the lower part, and a holding device that is connected to the linear member and holds the worker at the work position so that the work can be performed; And a processing device for performing a desired process on the inner surface of the cylindrical structure.   The holding device engages the linear member so as not to be detached and restricts the retracting in the pulling direction, and slides in one or both directions in the extending direction of the linear member by continuing a predetermined operation. It connects with the said linear member through the engaging device which accept | permits, The system for the inner surface treatment work of the cylindrical structure of Claim 1 characterized by the above-mentioned.   The system for processing an inner surface of a cylindrical structure according to claim 1 or 2, wherein the holding device has a holding portion that holds one or both of the buttocks and the trunk of the worker.   The said processing apparatus is a sandblast apparatus which performs the pre-processing of the coating of the inner surface of a cylindrical structure, or the coating apparatus which coats the inner surface of a cylindrical structure, The Claim 1 characterized by the above-mentioned. System for internal surface treatment work of cylindrical structures.   The system for inner surface treatment work of a cylindrical structure according to any one of claims 1 to 4, further comprising an air supply device that supplies clean air so that the worker can breathe without depending on ambient air. .   The air supply device includes a head mounting portion that covers a worker's head while securing a front view, and a supply tube that is connected to the head mounting portion and supplies clean air. The system for the inner surface treatment work of the cylindrical structure according to claim 5. It is an inner surface treatment work method of a cylindrical structure when performing the treatment work of the inner surface of the cylindrical structure extending in an inclined posture,
A linear member having a strength greater than or equal to a predetermined length from the upper part to the lower part in the cylindrical structure, and restricting the linear member from detachably engaging and retracting in the pulling direction and performing a predetermined operation. An engaging device that allows the linear member to slide in one direction or both directions in the extending direction of the linear member by continuation, and is connected to the engaging device to hold the operator in the working position with both hands free. Preparing a holding device and a processing device for performing desired processing on the inner surface of the cylindrical structure,
After fixing the linear member to the upper part in the cylindrical structure and extending it to the lower part, the holding device is connected to the upper linear member in the cylindrical structure via the engaging device to place the worker in the working position. After that, start processing the inner surface of the cylindrical structure by the processing device,
Then, every time the processing operation applied to the inner surface of the cylindrical structure at the work position is completed, the lowering of the cylindrical structure is repeated by lowering the engaging device while sliding the engaging device downward. Internal treatment method. As the processing device, a sandblasting device for pretreatment of the coating of the inner surface of the cylindrical structure, or a coating device for coating the inner surface of the cylindrical structure,
8. The inner surface processing method for a cylindrical structure according to claim 7, wherein sandblasting or painting is performed on the inner surface from the upper part to the lower part in the cylindrical structure. Preparing an air supply device for supplying clean air so that the worker can breathe without depending on the surrounding air;
The method for treating an inner surface of a cylindrical structure according to claim 7 or 8, wherein when the inner surface treatment of the cylindrical structure is performed by the processing apparatus, clean air is supplied from the air supply device to the operator.

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