JP2007301677A - Pedestal fixture for pipeline and its usage - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pedestal fixture for a pipeline capable of reducing equipment, working man-hours, working hours and a cost. <P>SOLUTION: This pedestal fixture 1 for the pipeline is provided with: a fixed base 10 having a pair of abutting faces 12 formed on the bottom and mounted on a gas pipe with their abutting on the upper-side outer circumferential face 90a of the gas pipe 90, being changeable between a degaussing state/excitation state, and attracted to the gas pipe in the excitation state; a plate member 40 provided on the fixing base and having its tip side extending to the end-part upper face 81 of the pedestal with the fixed base attracted to the gas pipe adjacent to the pipeline pedestal 80 mounted on the gas pipe; and a pushing means 50 pushing the tip part of the plate member 40 provided on the fixed base and extending to the end-part upper face of the pedestal, toward the end-part upper face. When fixing the pedestal to the gas pipe with this tool, the ground is excavated in such a state that a working object portion 90b alone of the gas pipe is exposed to the outside, the pedestal is mounted on the working object portion 90b, a pair of tools are attracted to the circumferential face of the gas pipe near the both sides of the pedestal, and the pedestal is fixed to the gas pipe by the plate member 40 and the pushing means 50 of each tool. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a pipe base fixing jig and a method of using the same, and more particularly, to a pipe pipe for fixing a base used when mounting a drilling machine, a tapping stand drilling machine, or the like to a gas pipe. The present invention relates to a pedestal fixing jig and a method of using the same.

  One of the operations using a pedestal on the gas pipe peripheral surface is a drilling operation. This drilling operation is a task for forming holes for loading a blocking member such as an air bag on both sides of a repaired section when repairing a partial section of a pipe line. In some cases, a branch member is provided.

  Conventionally, manually holding a drilling machine or tapping machine for drilling work or tapping work is labor intensive, so mounting a pedestal on a gas pipe as a holding means for such equipment has been performed. Yes. The pedestal is attached to the outer peripheral surface of the gas pipe by a chain or the like that circulates around the gas pipe, and a drilling machine or a tap stand is mounted on the upper flat surface.

  When the base is attached to the gas pipe, it is necessary to provide a space for the chain for fixing the base in the soil below the gas pipe. The soil above the gas pipe can be machined, but the soil below the gas pipe is manually dug. The main purpose of this is to prevent damage to the gas pipe, and the workability is extremely poor. Moreover, since a space of a size that allows an operator to enter and work is required in the case of manual digging work, the excavation area becomes large, and the labor for excavation becomes enormous.

  Further, when a pedestal is attached to the gas pipe and the chain is also circulated around the gas pipe, the gas pipe floats in the excavated resist. In addition, when backfilling is performed, the earth and sand at the time of backfilling is also put in the space portion below the lower peripheral surface of the gas pipe, but this work is difficult to perform and the compaction tends to be insufficient. For this reason, there is a possibility that the gas pipe receives an impact load due to the wheel load and is damaged by the vehicle passing through the road after the construction. Therefore, conventionally, a measure has been taken to compensate for the lack of compaction by filling the space below the lower half of the gas pipe with a sandbag.

  Originally, it is not preferable to dig the lower part of the lower half of the gas pipe to increase work man-hours such as taking measures for support, but it is absolutely necessary for the above-described chain wrapping. For this reason, conventionally, a treatment is generally employed in which fluidized soil or the like is poured into the space below the lower peripheral surface of the excavated gas pipe and hardened. However, when such a treatment is taken, the work time becomes long and the work cost becomes extremely high because the preparation step for the fluidization treatment method is required.

  Therefore, as described in Patent Document 1, a magnet type pedestal has been developed in which the pedestal can be attached to the gas pipe with only the upper side of the gas pipe exposed. The pedestal includes a plurality of permanent magnets arranged in an annular shape so as to face the upper outer peripheral surface of the gas pipe, and a ring-shaped rotation operation unit that is arranged above the permanent magnets and is rotatable.

  Permanent magnets, which are rotatable and fixed, are sequentially arranged in the circumferential direction, and N and S poles are magnetized at positions facing each other with a central axis extending in the vertical direction as the center. The direction of the rotatable permanent magnet can be changed by about 180 ° in accordance with the rotation operation of the rotation operation unit. For this reason, if a rotatable permanent magnet is rotated and adjacent magnets have the same polarity, the magnetic path between adjacent magnets is in an excited state in which the gas pipe is included, and the pedestal is adsorbed to the gas pipe If the adjacent magnets have different polarities, the adjacent magnets are magnetically short-circuited so that the magnetic path between these magnets does not include the gas pipe, and the pedestal is detached from the gas pipe. be able to.

Japanese Patent Laid-Open No. 2002-273739

  This conventional magnet-type pedestal has a base portion that can be mounted on the outer peripheral surface of the gas pipe, but the bottom surface of the base portion is formed in a shape along the outer peripheral surface of the gas pipe. It is necessary to prepare a pedestal for each gas pipe having a different diameter. If tools such as adapters and insertion devices that can be used with conventional chain-type pedestals cannot be used with magnetic-type pedestals, a magnetic-type pedestal can be prepared instead of a chain-type pedestal. Need to be prepared at the same time, resulting in the problem of very high initial investment.

  The present invention has been proposed in view of such problems, and it is an object of the present invention to provide a pedestal fixing jig for a pipe line and a method for using the same, which reduces equipment, work man-hours, and work time, and is inexpensive. And

  In order to solve such a problem, the pipe base fixing jig of the present invention is for a pipe line in which a device for drilling or tapping a part of a gas pipe made of a magnetic material can be mounted. A pipe pedestal fixing jig for fixing a pedestal to a gas pipe, having a pair of abutting surfaces arranged in an inverted V shape at the bottom, the pair of abutting surfaces being an upper outer peripheral surface of the gas pipe A fixed base that can be placed on the gas pipe in contact with the gas pipe, can be switched between a demagnetized state and an excited state, and can be adsorbed to the gas pipe in the excited state, and protrudes from the fixed base, and the tip side is at least A plate member that is movable in the vertical direction, and that has a fixed base adsorbed to a gas pipe in the vicinity of the pipe pedestal placed on the gas pipe, and has a distal end extending on the upper surface of the end of the pipe pedestal And the lower end of the plate member provided on the fixed base and extending on the upper surface of the end of the duct base is moved downward. A conduit pedestal against the end upper surface, characterized in that it comprises a pressing means for securing the gas pipe.

  According to the present invention, the pipe base fixing jig includes the fixing base, the plate member, and the pressing means, so that the fixing base is placed on the gas pipe in the vicinity of the pipe base placed on the gas pipe. The pipe base can be fixed to the gas pipe by adsorbing and pressing the pipe base against the gas pipe by the plate member and the pressing means provided on the fixing base. For this reason, if the pipe base fixing jig of the present invention is used, it is only necessary to excavate around the work position of the gas pipe, and it is not necessary to excavate the lower periphery of the gas pipe. For this reason, work time and work man-hours can be reduced, and work costs can be reduced. In addition, since the bottom of the fixing base of the pipe base fixing jig has a pair of contact surfaces arranged in an inverted V shape, the fixing base can be gas stably in a gas pipe having a different diameter. Can be adsorbed to the tube. For this reason, the existing pipe base corresponding to the gas pipes having different diameters can be used as they are, and the base can be fixed to the gas pipe by the pipe base fixing jig of the present invention. As a result, tools such as adapters and insertion devices used for the pipe base can be used as they are, and only the pipe base fixing jig of the present invention needs to be prepared, thus reducing the initial investment. be able to.

  Further, the plate member of the present invention includes a contact portion where the rear end side is bent downward and a rear end side end portion is in contact with the upper surface of the fixed base, and an arm which is connected to the upper portion of the corresponding contact portion and extends on the upper surface of the fixed base. And a pressing portion arranged on the upper surface of the end portion of the conduit base connected to the tip of the arm portion, and the pressing means is attached to the upper surface of the fixing base and extends upward to be a plate member A shaft portion that passes through the arm portion, and a nut portion that is screwed into the shaft portion that extends upward from the arm portion and is movable along the shaft portion. When the nut portion is moved downward along the shaft portion while being positioned on the upper surface of the end portion, the front end portion of the plate member comes into contact with the upper surface of the fixed base and the front end side of the plate member is lowered with the contact point as a fulcrum. And the pressing part presses the upper surface of the end of the duct base downward.

  According to this invention, the plate member has the contact portion, the arm portion, and the pressing portion, and the pressing means has the shaft portion and the nut portion, so that the pressing portion is the end portion of the pipe base. When the nut portion is moved downward along the shaft portion while being positioned on the upper surface, the front end portion of the plate member abuts on the upper surface of the fixed base and the front end side of the plate member moves downward with the contact point as a fulcrum. And a press part presses the edge part upper surface of a pipe base downward. Thus, since both the plate member and the pressing means have a simple configuration, the cost of the pipe base fixing jig including them can be reduced.

  Further, according to the method of using the pipe base fixing jig of the present invention, the pipe base that can be equipped with a device for drilling or tapping a part of a gas pipe formed of a magnetic material is fixed to the gas pipe. It has a pair of abutting surfaces arranged in an inverted V shape at the bottom, and the pair of abutting surfaces abuts on the upper outer peripheral surface of the gas pipe and can be placed on the gas pipe The demagnetization state and the excitation state can be switched, and a fixed base that can be adsorbed to the gas pipe in the excited state, and provided protruding from the fixed base, the tip side is movable at least in the vertical direction, In a state where the fixed base is adsorbed to the gas pipe in the vicinity of the placed pipe pedestal, the distal end side extends to the upper surface of the end of the duct pedestal, and the distal end is pressed against the upper surface of the end of the pipe pedestal. And a pressing means for fixing the gas pipe to the gas pipe. 2) Excavate the work part of the gas pipe to the outside, and place the pipe base on the work part of the gas pipe peripheral surface exposed to the outside, and the gas pipe peripheral surface in the vicinity of both sides of the pipe base A pair of pipe pedestal fixing jigs are adsorbed to each other, and the upper surface of the end of the pipe pedestal is pressed downward by each pressing means of the pipe pedestal fixing jigs to fix the pipe pedestal to the gas pipe. It is characterized by doing.

  According to the present invention, a pair of pipe base fixing jigs are adsorbed on the gas pipes near both sides of the pipe base placed on the gas pipe, and each pressing means of the pipe base fixing jigs is pressed. By pressing the upper surface of the end of the pipe pedestal downward and fixing the pipe pedestal to the gas pipe, it is only necessary to excavate around the work position of the gas pipe. There is no need to drill. For this reason, work man-hours and work time are reduced, and work costs can be reduced. In addition, since the bottom of the fixing base of the pipe base fixing jig has a pair of contact surfaces arranged in an inverted V shape, the fixing base can be gas stably in a gas pipe having a different diameter. Can be adsorbed to the tube. For this reason, it is possible to fix the pedestal to the gas pipe by using the existing pipe pedestal corresponding to the gas pipes with different diameters. As a result, the adapter used for the pipe pedestal, the insertion Tools such as an apparatus can be used as they are, and only the pipe base fixing jig of the present invention needs to be prepared, so that the initial investment can be reduced.

  According to the pipeline pedestal fixing jig and the method of using the same according to the present invention, the pipeline pedestal fixing jig includes a fixing base, a plate member, and pressing means, and is placed on the gas pipe. By adsorbing the fixed base on the gas pipe in the vicinity of the pipe and pressing the pipe base against the gas pipe by the plate member and pressing means provided on the fixed base, the equipment, work man-hours and work time are reduced, and the cost is reduced. An inexpensive pedestal fixing jig for pipes and a method for using the same can be provided.

  Hereinafter, preferred embodiments of a pipe base fixing jig and a method of using the same according to the present invention will be described with reference to FIGS. First, before explaining the usage method of the pipe base fixing jig of the present invention, the pipe base fixing jig will be explained. The pipe pedestal fixing jig of the present invention is used when fixing a pipe pedestal that can be equipped with a device for perforating or tapping a part of a gas pipe to the gas pipe. In addition, the gas pipe according to the present embodiment is a gas pipe having magnetism (for example, a cast iron pipe).

  As shown in FIG. 1A (side view), FIG. 1B (front view), and FIG. 1C (plan view), the pipe base fixing jig 1 is mounted on the gas pipe 90. A fixed base 10 that is placed and adsorbed; a plate member 40 that protrudes from the fixed base 10 and extends on the end upper surface 81 of the pipe base 80; and a pipe base that is provided on the fixed base 10. And a pressing means 50 for pressing the tip of the plate member 40 extending on the upper end surface 81 of the 80 against the upper end surface 81 to fix the conduit base 80 to the gas pipe 90.

  The fixed base 10 includes a main body portion 11 that forms a space portion therein, a magnetic force switching portion 15 that is rotatably accommodated in the space portion of the main body portion 11 and can be switched between a demagnetization state and an excitation state, A lever 25 is rotatably attached to the front side of the unit 11 and connected to the magnetic force switching unit 15 to switch the magnetic force switching unit 15 to a demagnetized state or an excited state.

  The main body 11 is magnetized and made of a metal material and has a rectangular parallelepiped shape, and has a pair of contact surfaces 12 arranged in an inverted V shape in a front view at the lower part. The pair of contact surfaces 12 are arranged such that an angle θ formed between them is an obtuse angle. The contact surfaces 12 are formed in a rectangular shape and extend from the front end portion of the main body 11 to the rear end portion. A rectangular groove 13 is formed between the pair of contact surfaces 12 and extends from the front end of the main body 11 to the rear end. For this reason, even if the main body portion 11 is placed on each of the gas pipes 90 having different diameters, the pair of contact surfaces 12 abut on the outer peripheral surface of each gas pipe 90, and the main body portion 11 is placed on each gas pipe 90. Can be mounted stably.

  As shown in FIG. 2A (cross-sectional view), the magnetic force switching unit 15 includes a columnar magnet 16 that is rotatably disposed in the space portion of the main body 11 and extends in the lateral direction. The upper and lower portions are exposed and a pair of yokes 17 made of a magnetic material fixed in the main body 11 so as to cover both sides of the magnet 16 are provided. The magnet 16 is formed so that the N pole appears on one side in the radial direction and the S pole appears on the other side. The magnet 16 is connected to the lever 25 shown in FIG. Rotate.

  When the N pole is located at the top and the S pole is located at the bottom, the magnet 16 is short-circuited between the N pole and the S pole via the yoke 17 and has a demagnetized magnetic path that does not include the gas pipe 90. On the other hand, as shown in FIG. 2B (cross-sectional view), when the N pole is located on one side and the S pole is located on the other side, the lines of magnetic force extend to include the gas pipe 90. It becomes the magnetic path of the state. For this reason, when the lever 16 shown in FIG. 1B is rotated to bring the magnet 16 into the excited state, the fixed base 10 can be attracted to the gas pipe 90, and when the magnet 16 is brought into the demagnetized state, the fixed base 10 can be desorbed from the gas tube 90. The configuration of the magnetic force switching unit 15 is not limited to that described above, and if the magnet 16 can be switched between the demagnetized state and the excited state according to the turning operation of the lever 25 shown in FIG. Any configuration is possible.

  As shown in FIGS. 1 (a), 1 (b), and 1 (c), the lever 25 rotates between an excitation position where the magnet 16 is excited and a demagnetization position where the magnet 16 is demagnetized. It is configured to be movable. For this reason, the magnet 16 can be made into an excitation state or a demagnetization state by making the position of the lever 25 into either an excitation position or a demagnetization position.

  The pressing means 30 including the plate member 40 and the pressing means 50 is attached to the upper part of the fixed base 10 configured as described above. The plate member 40 has a rectangular shape in plan view, and is disposed so as to cover the upper surface 10 a of the fixed base 10. The rear end side bends downward and the rear end side end abuts against the upper surface 10 a of the fixed base 10. A contact part 41, an arm part 42 connected to the upper part of the contact part 41 and extending along the upper surface 10a of the fixed base 10, and connected to the tip part of the arm part 42 and bent downward and further bent forward. And a pressing portion 43 disposed on the upper end surface 81 of the pedestal 80.

  The plate member 40 is arranged such that the width direction length thereof is longer than that of the fixed base 10, and both widthwise ends of the plate member 40 protrude from the fixed base 10 in a state where the plate member 40 is installed on the fixed base 10. Is done. The length in the width direction of the plate member 40 is designed so that the contact area between the upper end surface 81 of the duct base 80 and the pressing portion 43 is maximized. The upper end surface 81 of the pipe pedestal 80 is formed in an annular shape, and is configured to extend substantially horizontally in a state where the pipe pedestal 80 is placed on the gas pipe 90.

  On both sides in the width direction of the contact portion 41 of the plate member 40, a pair of extension portions 41a extending downward are formed. The length L between the pair of extension portions 41 a has a slightly larger dimension than the width direction length B of the fixed base 10. For this reason, when the rear end side end of the contact portion 41 is brought into contact with the upper surface 10 a of the fixed base 10, the extended portions 41 a are disposed on both sides in the width direction of the fixed base 10, and the plate member Positioning in the width direction of 40 can be performed. The plate member 40 is formed by bending a sheet metal.

  The pressing means 50 is screwed into the central portion of the upper surface 10a of the fixed base 10 and extends upward to pass through the arm portion 42 of the plate member 40, and the shaft portion 51 extends upward from the arm portion 42. And a nut portion (wing nut) 55 that can be moved along the shaft portion 51. On the upper side of the shaft portion 51, a male screw portion 51a for screwing the nut portion 55 is formed, and on the upper end portion of the shaft portion 51, a groove portion 51b into which a driver can be inserted is formed. The nut portion 55 is provided with a plurality of knobs 56 extending obliquely upward so that the nut portion 55 can be easily rotated.

  Next, a method of using the pipe base fixing jig 1 when drilling and tapping the gas pipe 90 will be described. First, as shown in FIG. 3A (cross-sectional view), excavation is performed until the upper outer peripheral surface 90a of the gas pipe 90 is exposed. In this case, the vicinity of the buried position of the gas pipe 90 is excavated by machine digging using an excavator or the like, and then the pedestal pedestal 80 can be mounted on the upper outer peripheral surface 90a of the gas pipe 90 by switching to manual digging. Drill while adjusting the depth of manual digging to the extent.

  The excavation by manual digging is completed when the outer peripheral surface of the gas pipe 90 corresponding to the installation area on which the pipe base 80 can be mounted is exposed. For this reason, the excavation range at the periphery of the gas pipe 90 is the excavation range necessary for exposing the upper outer peripheral surface 90a of the gas pipe 90, and is required when excavating the lower peripheral surface of the gas pipe 90. The excavation range can be made extremely small without providing a space for a worker who has been able to enter.

  When the upper outer peripheral surface 90a of the gas pipe 90 is exposed, the conduit base 80 is placed on the work portion 90b of the gas pipe peripheral surface. Then, as shown in FIG. 3B (cross-sectional view), the pipe base fixing jig 1 is adsorbed on the gas pipe peripheral surface in the vicinity of one side of the pipe base 80. That is, the fixed base 10 is placed on the gas pipe 90 so that the pressing portion 43 of the plate member 40 is positioned on the upper end surface 81 of the pipe base 80, and the lever 25 is rotated and fixed to the excitation position. The table 10 is adsorbed on the gas pipe 90.

  Then, the nut portion 55 is turned and moved downward, and the pressing portion 43 of the plate member 40 is pressed against the upper surface 81 of the end portion of the conduit base 80 to fix one side of the conduit base 80 to the gas pipe 90. .

  Then, as shown in FIG. 3C (cross-sectional view), the pipe base fixing jig 1 is adsorbed to the gas pipe peripheral surface near the other side of the pipe base 80. That is, the fixed base 10 is placed on the gas pipe 90 so that the pressing portion 43 of the plate member 40 is positioned on the upper end surface 81 of the pipe base 80, and the lever 25 is rotated and fixed to the excitation position. The table 10 is adsorbed on the gas pipe 90. Then, the nut portion 55 is turned and moved downward, and the pressing portion 43 of the plate member 40 is pressed against the upper surface 81 of the end of the conduit base 80 to fix the other side of the conduit base 80 to the gas pipe 90. . Then, a construction machine for a drilling machine or a tapping machine is mounted on the pipe base 80, and a drilling work and a tapping work are performed.

  As described above, the pipe base fixing jig 1 of the present invention is adsorbed on the gas pipe 90 in the vicinity of the pipe base 80 placed on the gas pipe 90 and is provided on the fixing base 10. Since the pipe pedestal 80 is pressed against the gas pipe 90 by the member 40 and the pressing means 50 and the pipe pedestal 80 is fixed to the gas pipe 90, only the periphery of the work position 90b of the gas pipe 90 needs to be excavated. It is not necessary to excavate the lower periphery of the gas pipe 90. For this reason, work man-hours and work time are reduced, and work costs can be reduced. Further, the bottom of the fixing base 10 of the pipe base fixing jig 1 includes a pair of contact surfaces 12 arranged in an inverted V shape shown in FIG. The fixing base 10 can be adsorbed to the gas pipe 90 in a stable state. For this reason, the existing pipe base 80 corresponding to the gas pipes 90 having different diameters can be used as they are, and the base can be fixed to the gas pipe 90 by the pipe base fixing jig 1 of the present invention. As a result, tools such as adapters and insertion devices used for the pipe pedestal 80 can be used as they are, and only the pipe pedestal fixing jig 1 of the present invention needs to be prepared. can do.

  In the above-described embodiment, the case where the pipe base fixing jig 1 is adsorbed almost directly above the gas pipe 90 has been shown. However, as shown in FIG. When performing drilling or tapping operations in the pipe, excavation is performed so that the side portion of the gas pipe 90 is exposed, and the pipe base fixing jig 1 is inclined with respect to the vertical line V (θ in the drawing). It is also possible to adsorb to the side of the gas pipe 90.

The pipe base fixing jig concerning one embodiment of the present invention is shown, The figure (a) is a side view showing a part of pipe base fixing jig in a section, the figure (b) Is a front view of the pedestal fixing jig for pipes, and FIG. 5C is a plan view of the pedestal fixing jig for pipes. Sectional drawing of the fixing base for demonstrating the magnetic force switching part provided in the inside of the fixing base of this base pedestal fixing jig is shown. Sectional drawing for demonstrating the usage method of the pipe base fixing jig is shown. Sectional drawing of a gas pipe at the time of adsorb | sucking the base fixing fixture for pipes to the side part of a gas pipe is shown.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Pipe base fixing fixture 10 Fixing base 12 Contact surface 30 Pressing means 40 Plate member 41 Contact part 42 Arm part 43 Press part 50 Press means 51 Shaft part 55 Nut part 80 Pipe base 81 End part upper surface 90 Gas pipe 90a Upper outer peripheral surface 90b Worked part

Claims (3)

A pipe pedestal fixing jig for fixing a pipe pedestal capable of mounting a device for drilling or tapping a part of a gas pipe formed of a magnetic material to the gas pipe,
A pair of abutting surfaces arranged in an inverted V shape at the bottom, the pair of abutting surfaces abutting on the upper outer peripheral surface of the gas pipe, and can be placed on the gas pipe; And a fixed base that can be switched to the excited state and can be adsorbed to the gas pipe in the excited state;
Protruding from the fixed base, the tip side is movable at least in the vertical direction, in the state where the fixed base is adsorbed to the gas pipe in the vicinity of the pipeline base placed on the gas pipe, A plate member whose tip side extends on the top surface of the end of the duct base;
The tip of the plate member provided on the fixing base and extending on the upper surface of the end of the duct base is moved downward and pressed against the upper surface of the end to fix the duct base to the gas pipe. A pedestal fixing jig for a pipe, comprising a pressing means. The plate member includes a contact portion where the rear end side is bent downward and a rear end side end portion is in contact with the upper surface of the fixed base, and an arm portion which is connected to an upper portion of the corresponding contact portion and extends on the upper surface of the fixed base. And a pressing portion that is connected to the distal end portion of the arm portion and disposed on the upper surface of the end portion of the conduit base,
The pressing means is attached to the upper surface of the fixed base and extends upward, and is screwed into a shaft portion that passes through the arm portion of the plate member, and a shaft portion that extends upward from the arm portion. A nut portion movable along the portion,
When the nut portion is moved downward along the shaft portion in a state where the pressing portion is positioned on the upper surface of the end portion of the conduit base, the tip end portion of the abutting portion contacts the upper surface of the fixed base. 2. The conduit according to claim 1, wherein the leading end side of the plate member moves downward with the contact point as a fulcrum, and the pressing portion presses the upper surface of the end of the conduit base downward. Base fixing jig. Used to fix a pipe base to which a device for drilling or tapping a part of a gas pipe formed of a magnetic material can be attached to the gas pipe,
A pair of abutting surfaces arranged in an inverted V shape at the bottom, the pair of abutting surfaces abutting on the upper outer peripheral surface of the gas pipe, and can be placed on the gas pipe; And a fixed base that can be switched to the excited state and can be adsorbed to the gas pipe in the excited state;
Protruding from the fixing base, the tip side is movable at least in the vertical direction, and in the state where the fixing base is adsorbed to the gas pipe in the vicinity of the pipeline base placed on the gas pipe, A pipe base fixing jig comprising: a distal end side extending to an upper surface of an end portion of the conduit base; and a pressing means for pressing the distal end side against the upper surface of the end portion and fixing the conduit base to the gas pipe. How to use,
Excavating only the work part of the gas pipe exposed to the outside,
Place the pipeline pedestal on the work portion of the gas pipe peripheral surface exposed to the outside,
A pair of the pipe base fixing jigs are adsorbed to the gas pipe peripheral surface near both sides of the pipe base;
Fixing the pedestal for pipes by pressing down the upper surface of the end of the pedestal for the pipe pedestal downward by the pressing means of the pedestal fixing jig for pipes. How to use the jig.

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