JP4648890B2 - In-pipe drilling device - Google Patents

Description

  The present invention, for example, pierces from the inside of the tube joint portion of the receiving tube portion and the insertion tube portion that is inserted and connected to this from the tube axis direction, and the pierced portion is a locking pin or screw The joint structure of both pipe parts is improved to a seismic joint structure with a high detachment prevention function by preventing the relative movement of both pipe parts in the direction of the pipe axis. The joint structure of both pipe parts is formed by drilling from the inside of the pipe to the seal part constituted by the overlapping part of the mouth pipe part and the insertion pipe part, and filling the seal part with the sealing material through the drilled part. The present invention relates to an in-pipe perforation apparatus used for repairing the sealing function in the above.

  When drilling at a set drilling position on the inner wall of a fluid pipe, conventionally, an electric drill, which is a drilling means carried into the pipe, is carried, and the weight and reaction force of the electric drill are artificially received by a shoulder or arm. A method of drilling while stopping is generally adopted.

  In addition, a driving body in which a movable body that can slide in the fluid pipe along the axial direction of the pipe, a drill portion that can be drilled in the inner wall of the pipe is attached to the tip, and the driving shaft in the pipe radial direction and the vertical direction There has also been proposed one provided with perforating means including a feeding portion for moving forward and backward and a driving portion for applying a driving rotational force to the driving shaft (for example, see Patent Document 1).

Japanese Patent Laid-Open No. 11-118088

  In the case of the former drilling method, since the weight of the electric drill and the drilling reaction force are artificially received by the shoulders, arms, etc., the burden on the operator is heavy, and moreover, multiple locations in the circumferential direction of the inner wall of the pipe are drilled in order. In some cases, the area in which the work can be performed in a downward posture is small, and an unreasonable posture is often imposed in a limited space in the pipe, which requires a lot of labor and time for the drilling work.

  In the case of the latter drilling device, although the weight of the drilling means and the drilling reaction force can be received by the movable body, the drilling direction by the drilling means is the vertical direction. Drilling cannot be performed, and there is a disadvantage that the drilling work content is limited.

  The present invention has been made in view of the above-described situation, and the main problem is that even when drilling at a plurality of locations in the circumferential direction of the inner wall of the tube, it is possible to reliably drill at a predetermined drilling position. However, it is an object of the present invention to provide an in-pipe piercing device that can easily and efficiently change and align the piercing position of the piercing means with less effort.

  The first characteristic configuration of the pipe drilling device according to the present invention is that the machine body that can be carried into the fluid pipe is fixedly held and released in a state where it is stretched from the radial direction to any position in the circumferential direction of the pipe inner wall. An operable tension holding means, a punching means having a rotary punching tool capable of being fed in a radial direction with respect to the inner wall of the pipe, and a circular body along the inner wall of the pipe in a state where the tension holding means is unlocked. A rotation guide means for rotating and guiding in the circumferential direction is provided.

According to the above characteristic configuration, for example, when drilling a plurality of locations in the circumferential direction of the inner wall of the pipe in order, the machine body is circumferentially arranged along the inner wall of the pipe by the rotation guide means provided in the machine body that can be carried into the fluid pipe. While rotating and guiding in the direction, the rotary drilling tool of the drilling means is aligned with the set drilling position of the inner wall of the pipe, and in this state, the tension holding means is operated to the tension fixed state to fix and hold the machine body on the inner wall of the pipe. Are drilled at the set drilling position on the inner wall of the tube by the rotary drilling tool.
When the drilling operation at the set drilling position is finished, the tension holding means is released and the machine guides the machine body in the circumferential direction along the inner wall of the pipe by the rotation guide means. When the next set drilling position is reached, the thrust holding means is operated in a stretched state, and the next set drilling position on the inner wall of the pipe is drilled by the rotary punching tool of the drilling means.

  Therefore, in a state where the tension holding means is unlocked, the body is provided along the inner wall of the pipe in the circumferential direction while the rotation guide means supports the weight of the body having the tension holding means and the punching device. Can be freely rotated. Nevertheless, at the time of drilling, it is possible to securely and firmly hold the rotary drilling tool of the drilling means at a predetermined set drilling position by the tension fixing of the tension holding means, and to reliably receive the drilling reaction force.

  Therefore, even when drilling at a plurality of locations in the circumferential direction of the inner wall of the tube, it is possible to reliably drill at a predetermined set drilling position, but easily and efficiently change and align the drilling position of the drilling means with less effort. Can be done.

According to a second characteristic configuration of the in-pipe drilling device of the present invention, the rotation guide means is movable in a circumferential direction with respect to the inner wall of the pipe from a direction perpendicular or substantially perpendicular to the drilling center line of the punching means. And a pair of rotation support arms that rotatably supports the airframe around the tube axis or substantially the tube axis while the abutment is in contact with the inner wall of the tube. It is in the point provided.

  According to the above characteristic configuration, in a state where the contact portions of the pair of rotation support arms are in contact with the inner wall of the tube from a direction orthogonal to or substantially orthogonal to the piercing center line of the piercing means, the machine body is the tube axis. Alternatively, it is advantageous in terms of structure and manufacturing cost to provide a drilling device that can be freely rotated about the axis of the tube and that can easily and efficiently change and align the drilling position of the drilling means with less effort. Can be produced.

According to a third characteristic configuration of the in-pipe drilling device of the present invention, the rotation support arm is in a rotation support posture orthogonal to or substantially orthogonal to the drilling center line of the punching means and the rotation support posture. This is because it can be switched to the retracted posture retracted in the intersecting direction.

According to the above characteristic configuration, at the time of drilling, the rotation support arm is set in the rotation support posture, and the contact portion of the rotation support arm is perpendicular to or substantially orthogonal to the drilling center line of the drilling means. By abutting against the inner wall of the tube, the machine body can be freely rotated around the tube axis or substantially the tube axis, and the drilling position of the drilling means can be changed and aligned easily and efficiently with little effort. be able to.
Further, when it is necessary to move the machine body along the tube axis direction after the drilling operation is completed, the rotation support arm in the rotation support posture is set in a direction crossing the rotation support posture. By switching to the retracted retracted posture, it is possible to suppress a collision with the inner wall of the tube caused by the rotation support arm projecting laterally with respect to the moving direction.

According to a fourth characteristic configuration of the in-pipe punching device of the present invention, the abutting portion provided at the tip of the rotation support arm is accompanied by a tilting operation of the airframe while the rotation support arm is in the retracted position. Thus, it can be brought into contact with the bottom surface side of the inner wall of the pipe, and in the abutted state, it can be moved and operated along the axial direction of the pipe while being floated from the inner wall of the pipe.

  According to the above characteristic configuration, when the drilling device is carried in or out along the fluid pipe, when the machine body is tilted after the turning support arm is switched to the retracted position, the contact portion on the tip side of the turning support arm Is in contact with the bottom surface side of the inner wall of the pipe, and further the tilting operation is continued with the abutting portion in contact with the bottom surface side of the inner wall of the pipe as a fulcrum, so that the aircraft floats from the inner wall of the pipe and remains in the floating state Can be moved along the tube axis direction as a traveling part, so that not only the drilling device can be moved quickly and easily in the tube, but also the body can be moved and guided in the circumferential direction. The structure of the rotation guide means can be used advantageously in terms of structure and cost.

A fifth characteristic configuration of the in-pipe perforating apparatus according to the present invention is that length adjusting means for adjusting the radial length of the pivot support arm is provided.

  According to the above characteristic configuration, by adjusting the radial length of the pivot support arm in accordance with the diameter of the fluid pipe, the machine body related to the diameter of the fluid pipe can be reliably secured in the circumferential direction along the pipe inner wall. Rotation guidance can be performed.

According to a sixth characteristic configuration of the in-pipe drilling device of the present invention, the tension holding means is arranged in a direction along the pipe radial direction with respect to both sides in the circumferential direction of the portion intersecting the perforation center line of the punching means on the inner wall of the pipe. It is in the point provided with the press part which contact | abuts.
According to the above characteristic configuration, when the fuselage is fixed and held in a stretched state from the radial direction with respect to an arbitrary position in the circumferential direction of the pipe inner wall by the tension holding means provided on the fuselage, the pressing portion of the tension holding means is Since it is arranged on both sides in the circumferential direction of the part intersecting with the perforation center line of the perforation means on the inner wall of the pipe, the perforation center line side opposite to each other due to the thrust action by the pressing portions located on both sides in the circumferential direction Therefore, the piercing device can be securely fixed and held at the piercing position where the piercing device is aligned.

According to a seventh characteristic configuration of the in-pipe perforating apparatus of the present invention, the tension holding means is a tension length adjusting means for adjusting the length of the tension in the radial direction, and an adjustment range by the tension length adjusting means is a fluid pipe. There is an adjustment range changing means that can be changed in a plurality of stages in the tube diameter direction according to the inner diameter of the tube.

  According to the above characteristic configuration, the tension length is changed by a large adjustment unit according to the diameter of the fluid pipe by the adjustment range changing means of the tension holding means, and the tension length is further adjusted by the tension length adjusting means. By adjusting with a small adjustment unit in accordance with the type and tolerance of the fluid pipe, the airframe can be securely fixed and held on the inner wall of the pipe regardless of the type and tolerance of the fluid pipe.

The eighth characteristic configuration according to the present invention is such that both pipe parts are overlapped in order to prevent relative movement in the pipe axis direction between the receiving pipe part and the insertion pipe part inserted and connected thereto from the pipe axis direction. An in-pipe drilling device for drilling a locking hole for engaging and connecting along a radial direction over a joining pipe portion from the inside of the pipe,
To the airframe that can be carried into both the pipe sections, the airframe is fixedly held and released from the radial direction with respect to an arbitrary position in the circumferential direction of the inner wall of the pipe, and a tension holding means that can be freely fixed and released, and an inner wall of the pipe A punching means having a rotary punching tool capable of being fed from the radial direction and a rotation guide means for rotating and guiding the machine body in the circumferential direction along the inner wall of the pipe in a state in which the tension holding means is unlocked are provided. In addition, the tension holding means displays a distance from the end surface of the insertion tube portion or the inner surface of the stepped portion of the receiving tube portion opposite to the end surface of the insertion tube portion to the set drilling position. Means is provided.

According to the above-described characteristic configuration, the engagement connection locking holes extending in the radial direction over the polymerization bonding tube portion are provided from the inner side of the polymerization bonding tube portion at a plurality of positions in the circumferential direction of the polymerization bonding tube portion between the receiving tube portion and the insertion tube portion. When drilling, the rotary punching means of the drilling means is mounted on the inner wall of the pipe while rotating and guiding the machine body in the circumferential direction along the inner wall of the pipe by the rotation guide means installed in the machine body that can be carried into both pipe sections. Align to the set drilling position. At this time, the distance from the end surface of the insertion tube portion or the inner surface of the stepped portion of the receiving tube portion facing each other in the tube axis direction to the set drilling position is adjusted to the set distance based on the display of the drilling position display means. In this state, the tension holding means is operated in the tension fixed state to fix and hold the machine body on the inner wall of the pipe, and the rotary drilling tool of the drilling means drills at the set drilling position of the superposition joining pipe portion.
When the drilling operation at the set drilling position is completed, the tension holding means is released and the machine guides the machine body in the circumferential direction along the inner wall of the pipe by the rotation guide means. When the next set drilling position is reached, the tension holding means is operated to be in the tension fixed state, and drilling is performed at the next set drilling position of the superposition joint pipe portion by the rotary punching tool of the drilling means.

  Therefore, in a state where the tension holding means is unlocked, the body is provided along the inner wall of the pipe in the circumferential direction while the rotation guide means supports the weight of the body having the tension holding means and the punching device. Can be freely rotated. Nevertheless, at the time of drilling, it is possible to reliably hold the rotary punching tool of the punching means at a predetermined set drilling position by the tension fixing of the tension holding means, and to reliably receive the punching reaction force, The distance adjustment from the end surface of the insertion tube portion or the stepped inner surface of the reception tube portion to the set perforation position can be performed quickly and easily.

  Therefore, when drilling at a plurality of positions in the circumferential direction of the superposed joint tube portion of the receiving tube portion and the insertion tube portion, the drilling position of the drilling means can be reliably drilled at a predetermined set drilling position. Can be easily and efficiently performed with little effort.

A ninth characteristic configuration of the perforating device for pipes according to the present invention is that the perforating position display means is provided in a pressing portion of a tension holding means that abuts on the inner wall of the pipe.

  According to the above characteristic configuration, the receiving pipe part facing the end surface of the insertion pipe part or the pipe core in the axial direction using the pressing part closest to the pipe inner wall among the constituent members of the tension holding means. Since the distance from the inner surface of the step to the set perforation position is displayed, the distance from the end surface of the insertion tube portion or the inner surface of the step of the receiving tube portion to the set perforation position can be quickly and easily adjusted. The position display means can be advantageously configured in terms of structure and manufacturing cost by using the pressing portion of the tension holding means.

According to a tenth characteristic configuration of the in-pipe drilling device of the present invention, the drilling position display means is provided with a positioning member that contacts the end surface of the insertion tube portion or the stepped inner surface of the receiving tube portion. is there.

  According to the above-described characteristic configuration, the positioning member of the perforation position display means is merely applied to the end surface of the insertion tube portion or the step inner surface of the reception tube portion, and the step surface of the insertion tube portion or the reception tube portion Since the display of the distance from the inner surface to the set drilling position is fixed, facilitation of distance adjustment from the end surface of the insertion tube portion or the stepped inner surface of the receiving tube portion to the set drilling position can be facilitated.

According to an eleventh characteristic configuration of the in-pipe drilling device of the present invention, the punching position display means can change a display distance from the end surface of the insertion tube portion or the stepped inner surface of the receiving tube portion to a set drilling position. It is in the point.

  According to the above characteristic configuration, for example, even if the distance between the opposing surfaces in the tube axis direction between the end surface of the insertion tube portion and the stepped inner surface of the receiving tube portion (body interval) varies from construction site to construction site. Since the display distance of the drilling position display means can be changed to a display distance according to the fluctuation value, the distance adjustment from the end surface of the insertion tube portion or the step inner surface of the receiving tube portion to the set drilling position is also accurate. Can be done easily.

[First Embodiment]
For example, as shown in FIG. 19, the in-pipe perforating apparatus of the present invention has an inlet pipe portion 1 of one fluid pipe P and an inlet pipe of the other fluid pipe P inserted and connected to this from the pipe axis X direction. Locking holes 3 are drilled from the inside of the pipe along the pipe radial direction in a plurality of positions in the circumferential direction of the superposed joint pipe part with the part 2 in a state extending over the superposed joint pipe parts of both pipe parts 1 and 2. A connecting member 4 such as a locking pin or a screw is inserted into the hole 3 by an appropriate means such as engagement or screwing, and both the tube portions 1 and 2 are fixedly connected so as not to move relative to each other in the tube axis X direction. Thus, it is used when the joint structure of both pipe parts 1 and 2 is improved to a joint structure for earthquake resistance having a high separation preventing function.

  As shown in FIGS. 1 to 10, the in-pipe perforating apparatus is configured such that the body A is stretched from the radial direction with respect to an arbitrary position in the circumferential direction of the pipe inner wall to the body A that can be carried into the fluid pipe P. A tension holding means B that can be fixedly held and released, a drilling means C including a drill 20 that is an example of a rotary drilling tool that can be fed into the inner wall of the pipe from the radial direction, and the tension holding means B. Rotation guide means D for rotating and guiding the machine body A in the circumferential direction along the inner wall of the pipe in the unlocked state is provided, and the tension holding means B includes the insertion tube portion 2. A perforation position display means E is provided for displaying the distance from the end face 2a or the stepped inner surface 1b of the receiving pipe portion 1 opposite to the end face 2a in the direction of the tube axis X to the set perforation position, that is, the planned perforation position by the perforation means C. ing.

  As shown in FIGS. 1 to 3, the airframe A has a pair of struts arranged in parallel to the perforation center line Y at equal intervals in a direction perpendicular to the perforation center line Y of the perforation means C. A shaft 7, a first crosspiece member 8 installed in the orthogonal direction over the vicinity of one end side of the both column shafts 7, and a middle portion of the both column shafts 7 displaced slightly to the other end side from the tube axis X A frame is formed in a substantially well shape with the second crosspiece member 9 installed in the orthogonal direction over the portion.

  A mark 7 a is formed on each of the column shafts 7 to indicate the mounting position with respect to the first horizontal beam member 8 and the second horizontal beam member 9, and the first horizontal beam member 8 is attached to both column shafts 7. On the other hand, by tightening a bolt 8C between the first horizontal beam main body 8A provided at both ends with a half connecting portion 8a that can be mounted from the axial direction, and the half horizontal connecting portion 8a of the first horizontal beam main body 8A. Further, the second horizontal beam member 9 has a half connecting portion 9a that can be attached to both the column shafts 7 in the axial radial direction at both ends. A substantially semicircular arc-shaped half-coupled body 9B that clamps and fixes the column shaft 7 by tightening a bolt 9C between the provided second horizontal-bar body 9A and the half-coupled portion 9a of the second horizontal rail body 9A. It consists of and.

  As shown in FIG. 1 to FIG. 4, the tension holding means B is located at one end portion of both the support shafts 7 and intersects with the perforation center line Y of the perforation means C on the inner wall of the insertion tube portion 2 ( The cylindrical first pressing portion 11 that comes into contact with the wall surface located on both sides in the circumferential direction of the planned drilling position) from the direction along the tube diameter direction, the center of the column being parallel to the tube axis X direction The screw shaft 12 is integrally formed in a substantially T-shape and is screwed and connected to the other end portions of the two support shafts 7. The screw shaft 12 is slidable in the direction of the screw shaft core. A pressing member 13 and a nut 14 that pushes and moves the pressing member 13 outward in the pipe radial direction toward the inner wall of the insertion tube portion 2 are configured.

  The both pressing members 13 are cylindrical second pressing portions 13A that come into contact with the wall surfaces located on both sides in the circumferential direction of the planned drilling position on the inner wall of the insertion tube portion 2 from the direction along the tube radial direction. And an attachment tube portion 13B that is slidably fitted to the screw shaft 12 in the direction of the screw axis, and the second pressing portion 13A of the attachment tube portion 13B has its cylindrical center at the tube axis. It is integrally formed in a substantially T shape in a state parallel to the X direction.

  And with the said screw shaft 12, the press member 13, and the nut 14, the stretch length which adjusts the stretch length in the radial direction from the press surface 11a of the said 1st press part 11 to the press surface 13a of the 2nd press part 13A. The length adjusting means B1 is configured, and the tension length adjustment range by the tension length adjusting means B1 is the screwing operation range of the nut 14 screwed into the male screw portion 12a of the screw shaft 12.

Furthermore, as shown in FIG. 10, the screw shaft 12 is composed of a plurality of types of screw shafts 12A, 12B, and 12C having different lengths, and the screw shafts 12A, 12B, and 12C have a pipe diameter (tube diameter). Accordingly, the adjustment range by the tension length adjusting means B1 can be changed in a plurality of stages in the pipe diameter direction according to the pipe diameter, in other words, a plurality of types of screw shafts having different lengths. 12A, 12B, and 12C constitute adjustment range changing means B2 that can change the adjustment range by the stretch length adjusting means B1 in a plurality of stages in the pipe diameter direction according to the pipe diameter.
The lengths of the male screw portions 12a formed on each of the plurality of types of screw shafts 12A, 12B, and 12C are unified to the same length, but depending on the length of the screw shafts 12A, 12B, and 12C, You may set the length of the external thread part 12a.

  Further, the pressing surfaces 11a of the first pressing portions 11 and the pressing surfaces 13a of the second pressing portions 13A are, as shown in FIG. 1, a perforation center line rather than the axial extension lines of the support shaft 7 and the screw shaft 12. Since it is configured to come into contact with the inner wall of the tube at a portion biased away from Y, a component force to the perforation centerline Y side that is opposite to each other is generated due to the tensioning action by the pressing portions 11 and 13A. The drilling device can be securely fixed and held at the drilling position where the drilling device is aligned.

  The first reinforcing plate 15 is fixedly connected by bolts 16 across the end faces located on the same side in the tube axis direction among the both end surfaces in the tube axis direction of both the first pressing portions 11, and the both second Similarly, in the pressing portion 13A, the second reinforcing plate 17 is fixedly connected by a bolt 16 over an end face located on the same side in the tube axis direction.

The perforation position display means E is the length from the axis of the support shaft 7 to the one end face 11b, 13b of the pressing portions 11 and 13A, which are constituent members of the tension holding means B, and the axis Y1 of the support shaft 7. Is shorter than the distance L2 from the other end surface 11c, 13c.
Further, the distance from the axial center of the support shaft 7 to the one end surfaces 11b and 13b and the thickness of the reinforcing plates 15 and 17 is set as the set distance from the end surface 2a of the insertion tube portion 2 to the set drilling position. The reinforcing plates 15 and 17 have the same setting configuration, and on the outer surfaces of the reinforcing plates 15 and 17, the end surface 2 a of the insertion tube portion 2 and the stepped inner surface 1 b of the receiving tube portion 1 facing this in the tube axis X direction. A positioning member 18 that enters the annular space between and the end face 2a of the insertion tube portion 2 from the direction of the tube axis X is provided in a state of being fastened together with the reinforcing plates 15 and 17.

  Then, at a plurality of locations in the circumferential direction of the polymerization joining tube portion between the receiving tube portion 1 and the insertion tube portion 2, the engagement connecting locking holes 3 extending in the radial direction are formed from the inside of the tube over the polymerization joining tube portion. When installing, it is necessary to match the drilling center position of the drill 20 of the drilling means C with the set drilling position that is separated from the end surface 2a of the insertion tube portion 2 or the stepped inner surface 1b of the receiving tube portion 1 by the set distance L1. However, at this time, the perforating means C can be obtained simply by applying the positioning member 18 provided on the one end face 11b, 13b side of the pressing part 11, 13A to the end face 2a of the insertion tube part 2 from the tube axis X direction. The drilling center position of the drill 20 is positioned on a circumferential line passing through the set drilling position, and the alignment work can be performed efficiently and reliably and easily.

  Further, the plate thickness of the positioning member 18 is configured to be slightly smaller than the width of the annular space between the end surface 2a of the insertion tube portion 2 and the stepped inner surface 1b of the reception tube portion 1, Even when the outer surface side of the positioning member 18 is applied to the stepped inner surface 1b of the receiving pipe portion 1 from the tube axis X direction, the drilling center position of the drill 20 of the drilling means C is on the circumferential line passing through the set drilling position. Therefore, the positioning operation can be performed efficiently, reliably and easily.

  The positioning member 18 may be provided on at least one of the pressing portions 11 and 13A on the one end face 11b and 13b side, the positioning member 18 is not provided, and the column shaft 7 when the length from the axis 7 to the one end surfaces 11b and 13b is set to be the same as the set distance from the end surface 2a of the insertion tube portion 2 to the set drilling position, The one end surfaces 11b and 13b of 13A are aligned with the end surface 2a of the insertion tube portion 2.

Next, the punching means C will be described.
As shown in FIGS. 1, 2, and 5, of the crosspiece members 8 and 9 of the airframe A, parallel to the drilling center line Y at equal intervals in the direction perpendicular to the drilling center line Y. A pair of sliding guide shafts 23 that slidably hold a speed reduction case 22 that houses a speed reduction mechanism of a power transmission system from the electric motor 21 to the drill 20 as an example of a drive source are installed at sites facing each other in various directions. In addition, the drive rotating shaft 26 to which the drill 20 is attached so as to be replaceable is moved integrally with the speed reduction case 22 across the bearing 24 of the speed reduction case 22 and the bearing 25 provided on the first crosspiece member 8. A feed operation shaft 28 that is screwed into a screw member 27 that is rotatably held only on the other end side of the drive rotary shaft 26 is rotated on the second horizontal beam member 9. This feed is only supported freely At the other end of Sakujiku 28, which with the operating handle 29 for via the screw member 27 to impart feed force or return force to the drive shaft 26 is mounted.

  A mounting seat 22a is formed at the input portion of the deceleration case 22 so that the electric motor 21 can be detachably attached with a bolt or the like. A stopper 30 is provided for restricting the retracted position by contact with the deceleration case 22.

  As shown in FIGS. 1 to 3 and FIGS. 6 to 9, the rotation guide means D is movable in a circumferential direction from a direction perpendicular or substantially perpendicular to the perforation center line Y of the perforation means C. An abutting portion 35 that abuts the inner wall of the tube is provided, and the machine body A is supported so as to be rotatable around the tube axis X or substantially the tube axis X while the abutting portion 35 is in contact with the inner wall of the tube. A pair of pivot support arms 36 are provided, and a pivot support posture perpendicular to or substantially perpendicular to the piercing center line Y of the piercing means C is provided at the base end portion of the pivot support arm 36 and its pivot support posture. A connecting portion 37 that is fixedly connected to the support shaft 7 in a state in which it can be rotated is provided so that it can be switched to a retracted posture that protrudes in a direction that intersects the rotational support posture.

  The rotation support arm 36 includes a first arm portion 36A using a screw shaft in which a small-diameter fitting connection shaft portion 36a is formed on the base end side, and slides in the axial direction with respect to the first arm portion 36A. A second arm portion 36B using a cylindrical shaft that is externally fitted to be freely movable, and a first arm portion 36A that is capable of pressing the proximal end side end surface of the second arm portion 36B toward the distal end side (radially outward). A tension nut 36C that is screwed into the second arm portion 36B, and a connecting flange portion 36D that is fixed to the tip of the second arm portion 36B, and a male screw portion of the first arm portion 36A and a tension nut 36C. Length adjusting means F for adjusting the arm length of the rotation support arm 36 is configured.

  The second arm portion 36B has a stopper bolt 36E that prevents relative rotation of both the arm portions 36A and 36B by engaging with a locking groove 36b formed in the first arm portion 36A along the axial direction. Furthermore, both arm portions 36A and 36B can be fixedly connected in a non-extensible state by tightening the stopper bolt 36E.

  Each of the contact portions 35 includes a single ring body (roller) 35A that can roll along the inner wall of the tube and a holder 35B that pivotally supports the ring body 35A. The holder 35B is connected to the second arm portion 36B. It is fixedly connected to the flange portion 36D with bolts 38 and nuts 39.

  The connecting portion 37 has a first connecting body 37A that can be externally mounted on the support shaft 7 from one side in the diameter direction thereof, and a first connection body 37A that can be mounted on the support shaft 7 from the other side in the diameter direction thereof. A first connecting link 37C and a second connecting link 37D attached to both side portions of the first connecting body 37A in the connecting mating surface direction via bolts 40 and nuts 41. A corresponding portion of the second connecting body 37B is pivotally connected to the tip of the first connecting link 37C of the body 37A via a bolt 40 and a nut 41 so as to be relatively swingable. The second connecting link 37D is formed with a screw hole 37d for fixing and connecting a corresponding portion of the second connecting body 37B with the fixing bolt 42 in a state where both the connecting bodies 37A and 37B are in the connecting posture.

  The first connecting body 37A is formed with a fitting connecting hole 37a into which the fitting connecting shaft portion 36a of the first arm portion 36A is fitted, and the fitting fitted into the fitting connecting hole 37a. A connecting bolt 43 is provided for preventing and fixing the combined connecting shaft portion 36a.

  When the rotation support arm 36 is switched from the rotation support posture to the retracted posture, the rotation support arms 36 are rotated 90 degrees around the column shaft 7 in a state where the both column shafts 7 are in the vertical posture. Thus, the retracted posture of the both rotation support arms 36 becomes a posture along the tube axis X direction, and in this state, the ring body 35A of the contact portion 35 provided at the tip of the both rotation support arms 36. Also, it is configured to be able to roll around a horizontal axis that is orthogonal to the tube axis X or a substantially horizontal axis.

  Therefore, the ring bodies 35A of the both abutting portions 35 can abut on the bottom side of the inner wall of the pipe in accordance with the tilting operation to the rear side of the airframe A in a state where the rotation support arm 36 is in the retracted posture. Further, the vehicle body A is lifted from the inner wall of the pipe by the lifting operation of the machine body A in the contact state, and can be operated along the tube axis X direction. That is, the ring body 35A as the contact portion 35 of the both rotation support arms 36 constituting the rotation guide means D is also used as a traveling wheel for loading / unloading the drilling device along the pipe inner wall. Yes.

  Further, as shown in FIG. 10, the first arm portion 36A is composed of a plurality of types of screw shafts 36Aa, 36Ab, 36Ac having different lengths, and the screw shafts 36Aa, 36Ab, 36Ac are adapted to the pipe diameter and the like. The arm length adjustment range by the length adjusting means F can be changed in a plurality of stages in the pipe diameter direction according to the pipe diameter (pipe diameter), in other words, the lengths are different. A plurality of types of screw shafts 36Aa, 36Ab, and 36Ac constitute an adjustment range changing means G that can change the arm length adjustment range by the length adjusting means F in a plurality of stages in the pipe diameter direction according to the pipe diameter.

Next, a brief description will be given of the seismic retrofit method for a joint structure using the in-pipe drilling device constructed as described above.
(1) As shown in FIGS. 11 and 12, the entire mortar lining layer 45 applied to the inner peripheral surface 2 b of the insertion tube portion 2 and the small-diameter inner peripheral surface 1 b of the receiving tube portion 1 is entirely formed. The mortar lining layer 45 located in a region slightly larger than the mounting region of the annular inner band 46 formed on the elastic sealing layer for sealing is peeled off, and the stretched length of the stretch holding means B is removed at this peeled portion. The adjusting means B1 is operated to the shortened state, and the punching apparatus in which both the rotation support arms 36 of the rotation guide means D are switched to the retracted position is carried in.

(2) As shown in FIG. 12, the nut 14 of the tension holding means B is operated to push the second pressing portion 13A of the pressing member 13 radially outward, and the end surfaces 11b of the pressing portions 11, 13A The positioning member 18 provided in 13b is placed in the annular space 47 between the end surface 2a of the insertion tube portion 2 and the stepped inner surface 1b of the receiving tube portion 1 facing this in the tube axis X direction. While pressing, the pressing surface 11a of each pressing portion 11 is lightly brought into contact with the inner wall of the tube while being movable in the tube axis X direction and the circumferential direction, and then the positioning member 18 of the pressing portions 11 and 13A is inserted. It abuts on the end surface 2a of the mouth tube portion 2 from the tube axis X direction.

  In this state, the drilling center position of the drill 20 of the drilling means C is positioned on the circumferential line passing through the set drilling position, so that the drilling center position of the drill 20 matches the set drilling position. After correcting the misalignment in the circumferential direction, the nut 14 of the tension holding means B is operated to push the pressing portion 11 outward in the radial direction, and the machine body A is firmly fixed and held on the inner wall of the pipe.

  Further, both the rotation support arms 36 of the rotation guide means D are switched to a rotation support posture orthogonal or substantially orthogonal to the drilling center line Y of the drilling means C, and an auxiliary support is required. Or when it is necessary to efficiently and smoothly rotate in the circumferential direction after drilling, the tension nut 36C is rotated so that the ring body 35A of the both abutting portions 35 becomes the inner wall surface of the pipe. The tube may be pushed outward in the radial direction of the tube until it can roll along.

(3) As shown in FIGS. 13 and 14, after the electric motor 21 is attached to the attachment seat 22a of the deceleration case 22 of the punching means C with bolts or the like, the operation handle 29 is operated to drive the electric motor 21. When the drill 20 is fed to the set drilling position on the inner wall of the pipe and the speed reduction case 22 comes into contact with the stopper 30 provided on the sliding guide shaft 23, the feeding operation is stopped. A locking hole 3 having a predetermined depth is drilled along the pipe radial direction from the inside of the pipe in a state of extending over the superposed joining pipe portion.
(4) As shown in FIGS. 15 and 16, the ring body 35 </ b> A of the both contact portions 35 is not pressed against the inner wall of the pipe in a state where it can roll along the inner wall of the pipe while supporting the airframe A. In this case, after rotating the tension nut 36C to press the ring body 35A against the inner wall of the pipe, the nut 14 of the tension holding means B is operated to move the second pressing portion 13A of the pressing member 13 in the radial direction. It is moved back and released, and the tension fixing by the tension holding means B is released.

When a rotational force is applied to the airframe A in this released state, the airframe A smoothly rotates around the tube axis X by the ring body 35A of the both-contact portion 35 that rolls along the inner wall of the tube, and the punching means C The turning operation is stopped when the drilling center position of the drill 20 reaches the next set drilling position.
During this turning operation, the pressing surface 11a of one of the first pressing portions 11 is in sliding contact with the inner wall of the pipe, and supports the body A in a T shape in cooperation with both turning support arms 36. However, the rotation guide by the rotation guide means D is assisted.

(5) As shown in FIG. 17, the nut 14 of the tension holding means B is operated to push the pressing portion 11 outward in the radial direction, and the machine body A is firmly fixed and held on the inner wall of the pipe.
At this time, if necessary, the tension nut 36C is rotated to the loose side to separate the ring body 35A from the inner wall of the pipe.

(6) Next, the operation handle 29 is operated to feed the drill 20 driven by the electric motor 21 to the set drilling position on the inner wall of the pipe, and the deceleration case 22 is provided with the stopper 30 provided on the sliding guide shaft 23. The feeding operation is stopped when it comes into contact, and a locking hole 3 having a predetermined depth is formed along the pipe radial direction from the inside of the pipe in a state of extending over the superposition joining pipe portions of the pipe sections 1 and 2.

(7) Then, while repeating the steps (4) to (6) described above, the set perforation positions are sequentially perforated at a plurality of locations in the circumferential direction of the superposed joint portion of the receiving tube portion 1 and the insertion tube portion 2. After that, as shown in FIG. 18, in the state where both the support shafts 7 are in the vertical posture, the respective rotation support arms 36 are rotated 90 degrees around the support shaft 7 so that the both rotation support arms 36 are tube axes. While switching to the retracted posture along the core X direction, the nut 14 of the tension holding means B is operated to move the second pressing portion 13A of the pressing member 13 back inward in the radial direction, and the tension holding means B fixes the tension. Is released.

  In this state, the ring body 35A of the abutting portion 35 provided at the tip of the both rotation support arms 36 can also roll around a horizontal axis or a substantially horizontal axis that is orthogonal to the tube axis X. As the machine body A tilts to the rear side, it comes into contact with the bottom surface side of the inner wall of the pipe, and further, the machine body A is lifted from the inner wall of the pipe by lifting the machine body A in the contact state. A traveling operation can be performed along the X direction.

In FIG. 19, reference numeral 48 denotes a synthetic rubber sealing material 49 that can seal between the large-diameter inner peripheral surface 1c of the receiving tube portion 1 and the outer peripheral surface 2c of the insertion tube portion 2. A cast iron push ring that can be compressed from the axial direction X to a sealed state (water tight state). Reference numerals 50 and 51 in the figure denote a connection flange portion 48A of the push ring 48 and a connection flange of the receiving tube portion 1. a bolt and nut and junk ring 4 8 and receiver pipe section 1 relative attracting while clamping the pipe axis X-direction disposed across between the parts 1A.
Reference numeral 52 in the figure denotes a first crimping tool that presses and fixes one end side of the inner surface band 46 in the tube axis X direction to the inner peripheral surface 2b of the insertion tube portion 2, and reference numeral 53 in the figure denotes a tube of the inner surface band 46. This is a second crimping tool that presses and fixes the other end side of the axial center X direction to the small-diameter inner peripheral surface 1a of the receiving tube portion 1.

[ Reference example ]
In the above-described first embodiment, both end portions of both strut shafts 7 are disposed on both sides in the circumferential direction of a portion (planned drilling position) that intersects the drilling center line Y of the drilling means C on the inner wall of the insertion tube unit 2. The cylindrical first pressing portion 11 that is in contact with the wall surface located in the tube radial direction is integrally formed, and the body is stretched from the radial direction to any position in the circumferential direction of the tube inner wall. A part of the tension holding means B that can freely hold and release A is configured, but as a reference example, as shown in FIGS. 20 and 21, the first pressing portion 11 extends from one end of the both support shafts 7. , The screw shaft 12 screwed and connected to the both column shafts 7 and the other end thereof, the substantially T-shaped pressing member 13 slidable in the direction of the screw shaft core, and the pressing The member 13 is pushed and moved outward in the radial direction of the tube toward the inner wall of the insertion tube portion 2. With a and Tsu bets 14 may constitute a reaction force receiving section H for receiving the drilling reaction force of the drilling unit C to the inner wall in contact state.

  In addition, since the other structure is the same as the structure demonstrated in 1st Embodiment, the same number is attached to the same structure location as 1st Embodiment, and the description is abbreviate | omitted.

[ Second Embodiment]
In the first embodiment described above, the abutting portion 35 provided at the tip of the rotation support arm 36 has a single ring body (roller) 35A that can roll along the inner wall of the tube and a holder 35B that supports this. However, as shown in FIG. 22, it may be composed of two ring bodies (rollers) 35A that can roll along the inner wall of the pipe and a holder 35B that pivotally supports them.
In addition, since the other structure is the same as the structure demonstrated in 1st Embodiment, the same number is attached to the same structure location as 1st Embodiment, and the description is abbreviate | omitted.

[ Third Embodiment]
In the above-described first embodiment, the rotation support arm 36 includes a first arm portion 36A using a screw shaft and a second arm using a cylindrical shaft that is externally fitted to the first arm portion 36A so as to be slidable in the axial direction. A portion 36B, a tension nut 36C that is screwed into the first arm portion 36A in a state where the base end side end surface of the second arm portion 36B can be pressed toward the distal end side (radially outward), and a second arm portion The connecting flange portion 36D is fixed to the distal end of 36B. However, as shown in FIG. 23, the second arm portion 36B is interposed between the tension nut 36C and the proximal end surface of the second arm portion 36B. A coil spring 55, which is an example of an elastic urging means that moves and urges the tube toward the distal end side (radially outward side), is interposed so as to follow the unevenness of the inner wall of the tube and move in the tube radial direction. Good.

In the present embodiment, the male screw portion of the first arm portion 36A, the tension nut 36C, and the coil spring 55 constitute length adjusting means F that adjusts the arm length of the rotation support arm 36. .
In addition, since the other structure is the same as the structure demonstrated in 1st Embodiment, the same number is attached to the same structure location as 1st Embodiment, and the description is abbreviate | omitted.

[ Fourth Embodiment]
In the first embodiment described above, the tension holding means B capable of fixing and releasing the machine body A in a stretched state from the radial direction with respect to an arbitrary position in the circumferential direction of the pipe inner wall, and the tension holding means B include Although the rotation guide means D for rotating and guiding the machine body A in the circumferential direction along the inner wall of the pipe in the unlocked state is configured separately, as shown in FIGS. In B, a rotation guide means D for rotating and guiding the machine body A in the circumferential direction along the inner wall of the pipe in a state where the fixation is released may be assembled.

  That is, the first pressing portion 11 and the second pressing portion 13A of the tension holding means B in the first embodiment are composed of a ring body (roller) 35A that can roll along the inner wall of the tube and a holder 35B that pivotally supports this. While changing to the contact portion 35, between the side end face of the mounting cylinder portion 13A of the pressing member 13 and the nut 14 screwed into the male screw portion 12a of the screw shaft 12 of the stretch length adjusting means B1, A coil spring 56, which is an example of an elastic biasing means that moves and biases the pressing member 13 toward the distal end side (radially outward), is interposed.

At the time of drilling, the nut 14 is operated to the tightening side, and the four ring bodies 35A are pressed against the inner wall of the pipe via the coil spring 56 to fix and hold the machine A, and the drill 20 of the drilling means C is fixed. When rotating to the next set perforation position adjacent in the circumferential direction, the nut 14 is operated to the loose side until the four ring bodies 35A can roll along the inner wall of the pipe.
In addition, since the other structure is the same as the structure demonstrated in 1st Embodiment, the same number is attached to the same structure location as 1st Embodiment, and the description is abbreviate | omitted.

[ Fifth Embodiment]
In the first embodiment described above, the drilling center position of the drill 20 of the drilling means C is set to the set drilling position that is separated from the end surface 2a of the insertion tube portion 2 or the stepped inner surface 1b of the receiving tube portion 1 by the set distance L1. When aligning, the positioning member 18 provided on the one end surface 11b, 13b side of the pressing portion 11, 13A was applied to the end surface 2a of the insertion tube portion 2 from the direction of the tube axis X, as shown in FIG. In addition, when the distance between the opposing surfaces in the tube axis X direction between the end surface 2a of the insertion tube portion 2 and the stepped inner surface 1b of the receiving tube portion 1 is larger than the set interval. , The outer surface side of the positioning member 18 is applied to the stepped inner surface 1b of the receiving tube portion 1 from the direction of the tube axis X, and the stepped inner surface 1b of the receiving tube portion 1 is set as a reference to the set perforation position.
In addition, since the other structure is the same as the structure demonstrated in 1st Embodiment, the same number is attached to the same structure location as 1st Embodiment, and the description is abbreviate | omitted.

[ Sixth Embodiment]
In the first embodiment described above, the positioning member 18 of the piercing position display means E is fixed to the outer surfaces of the reinforcing plates 15 and 17, but as shown in FIG. You may comprise the adjustment means E1 which can change and operate the display distance from the end surface 2a of the part 2 or the level | step difference inner surface 1b of the receiving pipe part 1 to a setting perforation position.
The adjusting means E1 forms a male screw 58 on the outer peripheral surface of the pressing portions 11 and 13A, forms a female screw on the inner peripheral surface of the positioning member 18, and moves the positioning member 18 to the pressing portions 11 and 13A. It is configured to be able to be screwed and adjusted in the tube axis X direction along the outer peripheral surface.
In FIG. 27, only the pressing portion 13A side of the pressing member 13 is illustrated, but the first pressing portion 11 is configured similarly.
In addition, since the other configuration is the same as the configuration described in the first embodiment, the same components are denoted by the same reference numerals as those in the first embodiment, and the description thereof is omitted.

[ Seventh Embodiment]
FIG. 28 shows another embodiment of the adjusting means E1 of the drilling position display means E described in the sixth embodiment, which is along the tube axis X direction from the center of the pressing portions 11, 13A. A pair of nuts 60 for holding and fixing the positioning member 18 sheathed on the adjustment bolt 59 projecting therefrom in a state where the position can be changed are screwed together.
In addition, since the other structure is the same as the structure demonstrated in 1st Embodiment, the same number is attached to the same structure location as 1st Embodiment, and the description is abbreviate | omitted.

[ Eighth Embodiment]
FIG. 29 shows another embodiment of the adjusting means E1 of the drilling position display means E described in the seventh embodiment, which includes the positioning member 18 and the reinforcing plates 15 and 17 which are sheathed on the adjusting bolt 59. And a plurality of adjustment spacers 61 are detachably mounted, and a nut 60 for pressing and fixing the positioning member 18 to the adjustment spacer 61 side is screwed together.
In addition, since the other structure is the same as the structure demonstrated in 1st Embodiment, the same number is attached to the same structure location as 1st Embodiment, and the description is abbreviate | omitted.

[Other Embodiments]
(1) In the first embodiment described above, the contact portion 35 of the rotation guide means D is slidable in the circumferential direction from a direction orthogonal or substantially orthogonal to the piercing center line Y of the piercing means C. the inner wall may be composed of the sliding member of the sled such you contact.

  (2) In the first embodiment described above, the drill 20 is fed by an artificial operation of the operation handle 29. However, the drill 20 is fed using a driving force such as an electric motor. Also good.

(3) In the first embodiment described above, the ring body 35A of the rotation guide means D is configured to be in a freely rotating state, but a drive source such as an electric motor that applies rotational force to the ring body 35A is provided. May be.
(4) Moreover, as the said piercing position display means E, you may comprise and add the scale which displays the setting distance from the end surface 2a of the insertion tube part 2 to a setting piercing position to the said press parts 11 and 13A. .

1 is an overall front view showing a first embodiment of an in-pipe perforating apparatus according to the present invention. Overall side view of in-pipe drilling device Overall plan view of in-pipe drilling device (A) is an enlarged vertical side view of the tension holding means (b) is an enlarged vertical side view when the tension holding means is unlocked (A) is an enlarged vertical side view of the drilling means (b) is an enlarged vertical side view of the drilling means when it is fed in. Enlarged front view of rotation guide means Enlarged plan view of the rotation guide means (A) is an enlarged front sectional view when the rotation guide means is in a contracted state (b) is an enlarged front sectional view when the rotation guide means is in an overhanging state. The top view of the principal part when the connection part of a rotation support arm is released. Three types of adjustment range change states according to the pipe diameter are shown. (B) is a front view showing the minimum adjustment range change state (b) is a front view showing the intermediate adjustment range change state (c) is a maximum adjustment range change state Front view showing Lined peeling process diagram of drilling work Delivery process diagram of drilling work Stretch fixing process diagram of drilling work Drilling process diagram of drilling work Rotation process diagram of drilling work Stretch fixing process diagram of drilling work Drilling process diagram of drilling work Unloading process diagram of drilling work Sectional view of the main part showing a joint structure for earthquake resistance with a high separation prevention function Front view whole showing a reference example of the tube internal use punching device Side view showing a reference example of an in- pipe drilling device The top view of the principal part which shows 2nd Embodiment of the drilling apparatus for pipes by this invention. The front view of the principal part which shows 3rd Embodiment of the perforation apparatus for pipes by this invention. Whole front view which shows 4th Embodiment of the drilling apparatus for pipes by this invention Side view of in-pipe drilling device Sectional side view of the principal part showing a fifth embodiment of the drilling device for pipes according to the present invention The side view of the principal part which shows 6th Embodiment of the perforation apparatus for pipes by this invention. The side view of the principal part which shows 7th Embodiment of the drilling apparatus for pipes by this invention. The side view of the principal part which shows 8th Embodiment of the drilling apparatus for pipes by this invention.

Explanation of symbols

A Machine body B Stretch holding means B1 Stretch length adjusting means B2 Length adjusting means C Drilling means D Rotating guide means E Drilling position display means F Length adjusting means G Adjustment range changing means H Reaction force receiving portion P Fluid pipe X Pipe Shaft core Y Perforation center line 1 Receptor tube portion 1b Stepped inner surface 2 Insertion tube portion 2a End surface 3 Locking hole 11 Pressing portion (first pressing portion)
13A pressing part (second pressing part)
20 Rotating drill (drill)
35 Abutting portion 36 Rotation support arm

Claims (11)

  Stretch-holding means that can hold and release the fuselage in a state of stretching from the radial direction to any position in the circumferential direction of the inner wall of the pipe on the machine body that can be carried into the fluid pipe, and radial direction with respect to the inner wall of the pipe Drilling means provided with a rotary drilling tool that can be fed from and a rotation guide means for rotating and guiding the machine body in the circumferential direction along the inner wall of the pipe in a state in which the tension holding means is unlocked. In-pipe drilling device. The rotation guide means includes a contact portion that is movably contacted in a circumferential direction with respect to the inner wall of the pipe from a direction orthogonal or substantially orthogonal to a piercing center line of the piercing means, and the contact portion There contact with that pipe for drilling device according to claim 1, wherein a pair of pivot support arms are provided for supporting rotatably the body in the pipe axis or substantially tube axis around while the tube wall. The rotation support arm is configured to be switchable between a rotation support posture orthogonal or substantially orthogonal to a punching center line of the punching means and a retracted posture retracted in a direction intersecting the rotation support posture. The in-pipe perforating apparatus according to claim 2 . The abutting portion provided at the tip of the pivot support arm can abut on the bottom surface side of the inner wall of the pipe along with the tilting operation of the airframe while the pivot support arm is in the retracted position, and The in-pipe drilling device according to claim 3 , wherein the in-pipe drilling device is configured to be movable along the axis of the tube while the airframe is levitated from the inner wall of the tube in the contact state. The perforating device for pipes according to claim 2, 3 or 4 in which said rotation support arm is provided with length adjustment means which adjusts the arm length.   The said tension holding means is provided with the press part which contact | abuts from the direction along a pipe radial direction with respect to the both sides of the circumferential direction of the site | part which cross | intersects the piercing center line of the piercing means in the said pipe | tube inner wall. In-pipe drilling device. The tension holding means includes a tension length adjusting means for adjusting the tension length, and an adjustment range change capable of changing the adjustment range by the tension length adjusting means in a plurality of stages in the pipe diameter direction according to the inner diameter of the fluid pipe. The in-pipe perforating apparatus according to claim 1 or 6, wherein means are provided. In order to prevent relative movement in the tube axis direction between the receiving tube portion and the insertion tube portion inserted and connected to this from the tube axis direction, it is engaged along the radial direction over the superposed joint portion of both pipe portions. An in-pipe drilling device for drilling a connecting locking hole from the inside of the pipe,
To the airframe that can be carried into both the pipe sections, the airframe is fixedly held and released from the radial direction with respect to an arbitrary position in the circumferential direction of the inner wall of the pipe, and a tension holding means that can be freely fixed and released, and an inner wall of the pipe A punching means having a rotary punching tool capable of being fed from the radial direction and a rotation guide means for rotating and guiding the machine body in the circumferential direction along the inner wall of the pipe in a state in which the tension holding means is unlocked are provided. In addition, the stretch holding means displays the distance from the end surface of the insertion tube portion or the stepped inner surface of the receiving tube portion facing the tube insertion tube in the axial direction to the set drilling position. An in-pipe drilling device provided with The in-pipe perforation apparatus according to claim 8, wherein the perforation position display means is provided in a pressing portion of a tension holding means that contacts the inner wall of the pipe. The in-pipe punching device according to claim 8 or 9, wherein the punching position display means is provided with a positioning member that comes into contact with an end surface of the insertion tube portion or a stepped inner surface of the receiving tube portion. Wherein puncturing positions displaying means, according to any one of the inserted pipe end surface or the receiver pipe portion according to claim from the step inner surface is capable of changing the display distance to set puncturing positions 8-10 In-pipe drilling device.

Images