JP2019118964A - Pipe inner surface treatment device - Google Patents

Abstract

To provide a pipe inner surface treatment device which can treat inner surfaces even for pipes with different inner diameters.SOLUTION: A pipe inner surface treatment device 1A comprises: an upper guide member 22a and a lower guide member 22b which are cantilevered, and have a second bearing 22c at a portion inserted in a pipe 30; a rotary shaft 21 of which a portion inserted in the pipe 30 is supported by the second bearing 22c; a rotary magnet 24 which is driven by the rotary shaft 21, and contacts an inner surface of the pipe 30; and a counter member 29 which is so provided as not to contact the inner surface of the pipe 30, and so makes a force against a reaction force from the inner surface of the pipe 30 contacting the rotary magnet 24 as to act on the rotary magnet 24, and which is different from the upper guide member 22a and the lower guide member 22b having the second bearing 22c.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an inner surface treatment apparatus for treating the inner surface of a tube with a rotary grinding member.

  DESCRIPTION OF RELATED ART Conventionally, the inner surface treatment apparatus which processes the inner surface of a pipe | tube with a rotation grinding member is known. For example, in Patent Document 1 and Patent Document 2, from the support rod inserted into the inner surface of the tube, the expandable arm is protruded in 4 directions or 3 directions toward the inner surface of the tube, and each rotation attached to the tip of the expandable arm A technique for finishing the inner surface of a tube with a roller is disclosed.

  Further, in Patent Document 3, in order to finish the inner surface of the tube, one polishing roller contacting the inner surface of the tube and two auxiliary rolls serving as a reaction force of the polishing roller are provided in contact with the inner surface of the tube. Technology is disclosed. Further, with this configuration, since the reaction force is obtained from the inner surface of the pipe, the polishing roller can be stably brought into contact with the inner surface of the pipe.

Japanese Utility Model Application Publication No. 59-090555 (published on June 19, 1984) Japanese Utility Model Publication No. 63-46220 (announced on December 1, 1988) Japanese Patent Application Laid-Open No. 51-58790 (May 22, 1976)

  By the way, in the above-mentioned conventional inner surface treatment apparatus for the inner tube, the other rotating roller or the auxiliary roller existing on the opposite side to the specific rotating roller or the polishing roller is brought into contact with the tube, and The force is obtained from the inside of the tube.

  However, the above-mentioned conventional inner surface treatment apparatus has a problem that it is not possible to process tubes having different inner diameters.

  One aspect of the present invention is made in view of the above-mentioned conventional problems, and an object of the present invention is to provide an inner surface treatment device capable of processing the inner surface even for tubes having different inner diameters.

  In order to solve the above problems, the inner surface treatment apparatus according to one aspect of the present invention has a support member supported at one side and having a bearing at a position inserted into the pipe, and a position inserted into the pipe A rotary shaft supported by a bearing, a rotary grinding member driven by the rotary shaft and in contact with the inner surface of the pipe, and an inner surface of the pipe provided noncontact with the inner surface of the pipe and in contact with the rotary grinding member And a counter member different from the support member having the bearing, which exerts a force on the rotary grinding member against a reaction force from the above. The rotary grinding member may be either single or plural.

  According to the above configuration, the rotary grinding member in contact with the inner surface of the tube is driven by the cantilevered rotation shaft. At this time, while the rotational grinding member receives a reaction force from the inner surface of the pipe, the opposing member different from the support member having the bearing exerts a force on the rotational grinding member against the reaction force. Thereby, the rotary grinding member can continue contact with the inner surface of the pipe, and the inner surface of the pipe can be ground.

  Here, conventionally, a rotating roller or a grinding roller is provided in contact with the inner surface of the pipe at a position opposite to the inner surface of the tube in contact with the rotating grinding member to obtain a force opposing the reaction force of the rotating grinding member. This is because this configuration can easily and inexpensively obtain a force that opposes the reaction force.

  However, in the case of such a configuration, when the inner diameter of the pipe changes, it is not possible to obtain a force that opposes the reaction force of the rotary grinding member. For example, when the inner diameter of the tube is increased, the rotating roller or the grinding roller does not contact the inner surface of the tube, so that a force against the reaction force can not be obtained. On the other hand, when the inner diameter of the pipe is reduced, the rotary grinding member and the rotating roller or grinding roller can not be inserted into the pipe.

  Therefore, in the pipe inner surface treatment apparatus according to one aspect of the present invention, the opposing member that exerts a force that opposes the reaction force from the rotary grinding member is inserted into the pipe and provided noncontact with the inner surface of the pipe.

  As a result, the opposing member can exert a force against the reaction force from the rotating grinding member regardless of the inner diameter of the pipe.

  Therefore, it is possible to provide an inner surface processing device capable of processing the inner surface of pipes having different inner diameters.

  In the inner surface treatment apparatus according to one aspect of the present invention, the counter member may include a cantilever member insertably supported in a cantilever manner in the pipe.

  Thus, the counter member includes a cantilever member and is separately supported from the support member having the bearing and is inserted into the pipe in a cantilever manner.

  Therefore, the specific configuration of the opposing member can be provided.

  In the inner surface treatment apparatus according to one aspect of the present invention, preferably, the opposing member includes an elastic member, and the cantilever member applies an elastic force to the rotational grinding member via the elastic member.

  The rotary grinding member moves relative to the inner circumference of the pipe while in contact with the inner surface of the pipe to grind the entire inner circumference of the pipe. In this case, since there is some unevenness on the inner surface of the pipe, the relative movement of the rotary grinding member along the inner circumference of the pipe is an obstacle to the movement. On the other hand, in the inner surface treatment apparatus according to one aspect of the present invention, the cantilever member applies an elastic force to the rotary grinding member via the elastic member. Therefore, even if the inner surface of the pipe has a protrusion, the rotary grinding member can ride on the protrusion.

  As a result, when the rotary grinding member relatively moves along the inner circumference of the pipe, a large load is applied during grinding of the rotary grinding member, and movement of the rotary grinding member along the inner circumference of the pipe is stopped or suppressed. There is no such thing as

  In the inner surface treatment apparatus according to one aspect of the present invention, a plurality of the elastic members are provided, and a plurality of elastic members are provided to sandwich a vertical surface including the rotation axis, and the plurality of elastic members are provided. The elastic force of the elastic member preferably has a component force whose direction is the vertical surface side. In addition, this structure does not matter whether the rotational grinding member is single or plural.

  Thereby, even when the rotary grinding member is displaced in the circumferential direction, the plurality of elastic members can suppress the displacement in the radial direction and can apply an elastic force in the direction in which the displacement in the circumferential direction is suppressed. As a result, it is possible to efficiently apply a force opposing the reaction force at the opposing member to the rotary grinding member.

  In the inner surface treatment apparatus according to one aspect of the present invention, preferably, the rotational grinding member is provided below the rotation shaft. In addition, this structure does not matter whether the rotational grinding member is single or plural.

  As described above, by providing the rotary grinding member on the lower side of the rotation shaft, the gravity acts on the rotary grinding member, so that the reaction force at the opposing member can be reduced.

  According to one aspect of the present invention, it is possible to provide an inner surface treatment apparatus capable of treating the inner surface of tubes having different inner diameters.

BRIEF DESCRIPTION OF THE DRAWINGS It is a front view which shows the whole structure of the pipe inner surface treatment apparatus in Embodiment 1 of this invention. It is a side view which shows the structure of the attachment apparatus of the said in-pipe surface treatment apparatus. It is a top view which shows the structure of the gear box for positive rotations as a driving force connecting member attached to the said attachment apparatus. It is a top view which shows the structure of the gear box for reverse rotation as a driving force connecting member attached to the said attachment apparatus. It is a front view which shows the structure of the contact member attached to the said attachment apparatus. It is a side view which shows the structure of the attachment apparatus of the pipe inner surface treatment apparatus in Embodiment 2 of this invention. It is a side view which shows the structure of the attachment apparatus of the pipe inner surface treatment apparatus in Embodiment 3 of this invention. It is a side view which shows the structure of the attachment apparatus of the pipe inner surface treatment apparatus in Embodiment 4 of this invention.

First Embodiment
One embodiment of the present invention will be described below with reference to FIGS.

  The inner surface processing apparatus of the present embodiment is, for example, grinding processing as a processing with the rotary grinding member for the inner surface of the pipe. That is, in the case of manufacturing, for example, a cast iron pipe as a pipe, the oxide film adheres to the inner surface of the pipe, and an uneven portion and wrinkles also occur. When the inner surface of the tube is coated, this oxide film causes a decrease in the adhesion of the coating, which becomes an obstacle. Therefore, it is necessary to grind the oxide film of the pipe with the rotary grinding member, and the pipe inner surface treatment apparatus of the present embodiment is subjected to the grinding process of the oxide film of the pipe. In the present embodiment, for example, a grinding process is performed, but the process of the present invention is not necessarily limited to the grinding process, and may be another process such as a polishing process. Further, in the present embodiment, for example, the pipe is subjected to the grinding process of the oxide film on the inner surface of the cast iron pipe, but the pipe is not necessarily limited to the cast iron pipe. Furthermore, it is not limited to the grinding process of the oxide film of the pipe, and may be simply the grinding process of the concavo-convex portion or the ridge of the inner surface of the pipe. Furthermore, in the present embodiment, the inner diameter of the pipe is, for example, 500 to 1600 mm, and a medium diameter pipe or a large diameter pipe is targeted. However, not only this but a small diameter pipe or an oversized diameter pipe may be sufficient.

  The entire configuration of the inner-pipe surface treatment apparatus 1A in the present embodiment will be described based on FIG. FIG. 1 is a front view showing an entire configuration of a tube inner surface treatment apparatus 1A in the present embodiment.

  As shown in FIG. 1, the inner surface processing device 1A of the present embodiment includes a traveling carriage 10 capable of traveling forward and backward in the tube axis direction, and a plurality of rotating grinding members extended from the traveling carriage 10 and supported in a cantilever manner. And an attachment device 20A including the rotary grindstone 24 of

  The traveling carriage 10 has wheels 11 and 11 as shown in FIG. 1 and is moved forward and backward along the rail 2 by the wheels 11 and 11 so as to attach the attachment device 20A inside a pipe 30 such as a cast iron pipe, for example. Can be inserted.

  The traveling carriage 10 includes a rotary shaft drive motor 12 for rotating the rotary shaft 21 of the attachment device 20A, a wheel drive motor 13 for driving the wheels 11 and 11, rotation of the rotary shaft drive motor 12 and the wheel drive motor 13 A control device (not shown) for controlling the drive is provided. The control device is provided with a remote controller, and this remote controller enables remote control without directly operating the control device.

  A front standing pole 15 stands on the tube 30 side of the rotary shaft drive motor 12 in the traveling carriage 10, while a rear standing pole 16 stands on the opposite side. The front standing post 15 and the rear standing post 16 cantileverly support an opposing member 29 as a support member described later.

  Next, the configuration of the attachment device 20A will be described.

  The attachment device 20A, as shown in FIG. 1, includes a rotary shaft 21 insertable into the tube 30, a rotary grinding stone 24 as a rotary grinding member provided at, for example, the tip of the rotary shaft 21 and contacting the inner surface of the tube 30 The driving force connecting member 23 for transmitting the rotation of the rotation wheel 21 to the rotary grindstone 24 and the opposing member 29 are provided.

  The rotation shaft 21 is rotationally driven by the rotation shaft drive motor 12 of the traveling carriage 10, and the rotation of the rotation shaft 21 is transmitted to the rotation whetstone 24 through the driving force connecting member 23, thereby the rotation whetstone 24 are supposed to rotate. The rotating shaft 21 has a length of, for example, 1 to 10 m in the present embodiment.

  The rotating shaft 21 is cantilevered as a fixed end on the support post 14 having the first bearing 14 a in the traveling carriage 10. For this reason, the tip end side of the rotating shaft 21 becomes unstable. Therefore, in the present embodiment, the upper guide member 22a and the lower guide member 22b as support members are extended in a cantilever state in parallel with the rotation shaft 21 from the support column 14 of the traveling carriage 10. The upper guide member 22a and the lower guide member 22b are fixed to a second bearing 22c rotatably supporting the rotating shaft 21 at the free end side.

  As a result, the rotary shaft 21 is supported and fixed to the support post 14 having the first bearing 14a of the traveling carriage 10 at the fixed end side, and the upper guide member 22a and the lower guide member 22b at the free end side and the second bearing It will be supported by 22c.

  In the present embodiment, as described above, the upper guide member 22a and the lower guide member 22b are provided to support the rotating shaft 21. However, like the upper guide member 22a and the lower guide member 22b, they are not separately formed, but are, for example, integrally formed like a tube, and the second bearing 22c is formed on the free end side of the guide tube. It is also possible to provide.

  Next, the transmission path of the rotational drive force to the rotary grindstone 24 of the present embodiment will be described based on FIGS. FIG. 2 is a side view showing the configuration of the attachment device 20A in the in-pipe surface treatment device 1A of the present embodiment. FIG. 3 is a plan view showing the configuration of the positive rotation gear box 23a as the driving force connecting member 23 attached to the attachment device 20A. FIG. 4 is a plan view showing the configuration of the reverse rotation gear box 23b as the driving force connecting member 23 attached to the attachment device 20A.

  In the pipe inner surface treatment apparatus 1A of the present embodiment, a driving force connecting member 23 is provided to transmit the rotational driving force of the rotating shaft 21 to the rotating grinding stone 24. In the present embodiment, the driving force connecting member 23 includes a gear box storing a plurality of gears. The driving force connecting member 23 transmits the rotational driving force of the rotating shaft 21 to the rotating grinding stone 24 by a plurality of gears. However, the driving force transmission method is not necessarily limited to this, and may be composed of, for example, a pulley and an endless belt. This also makes it possible to transmit the rotational drive force of the rotary shaft 21 to the rotary grinding stone 24.

  Here, in the attachment device 20A of the present embodiment, as shown in FIG. 2, a plurality of rotary grindstones 24 are provided below the rotary shaft 21 as a plurality. However, in one aspect of the present invention, the number of rotary grinding wheels 24 may not necessarily be more than one. In detail, two sets of rotary grindstones 24a and 24b are provided such that the grindstone rotational axes AX of the rotary grindstones 24a and 24b, which are rotary grindstones 24, are positioned below the rotary shaft 21. Each set of rotary grindstones 24a and 24b includes one or more (here, plural) grindstones aligned in the direction of the grindstone rotation axis AX (see FIG. 1). Then, each of the rotary grindstones 24a and 24b rotates in reverse to each other in order to prevent the two rotary grindstones 24a and 24b from being aligned and rotating clockwise or counterclockwise by the rotation of the tube 30. It is supposed to It is to be noted that the reverse rotation may be either the clockwise direction of the rotary whetstone 24 a and the counterclockwise direction of the rotary whetstone 24 b or the counterclockwise direction of the rotary whetstone 24 a and the clockwise direction of the rotary whetstone 24 b. However, it is preferable that the rotary grindstone 24 a is clockwise and the rotary grind 24 b is counterclockwise as viewed from the free end side. The details will be described below.

  That is, the rotary grindstone 24a is provided on one side with respect to a plane including the center of the rotary shaft 21, and the rotary grindstone 24b is provided on the other side. The rotation direction of the rotary grindstone 24a is opposite to the rotation direction of the rotary grindstone 24b. Thereby, the relative position of the rotary grindstones 24a and 24b with respect to the rotary shaft can be stably held. Therefore, the inner surface of the tube 30 can be ground stably. The rotary grindstones 24a and 24b rotate toward the bottom portion 30a of the pipe 30 (an intermediate position between the rotary grindstone 24a and the rotary grindstone 24b in the pipe 30) on the side in contact with the inner surface of the pipe 30. As a result, the rotary grindstones 24a and 24b rotate toward the bottommost portion 30a of the pipe 30 on the side in contact with the inner surface of the pipe 30, so that the rotary grindstones 24a and 24b move to the bottommost portion 30a of the pipe 30. It tries to go in the opposite direction to the heading direction. As a result, the relative positions of the rotary grindstones 24a and 24b with respect to the rotary shaft 21 can be held more stably. In addition, although the rotating stone 24a generates a force moving upward from the bottom portion 30a by this rotation, the force can be effectively suppressed by the opposing member 29. For this reason, it becomes possible to carry out grinding processing stably. The position of the axis of the rotary grindstone 24a and the position of the axis of the rotary grindstone 24b are different from each other.

  Further, since the inner pipe surface treatment apparatus 1A includes a plurality of rotary grindstones 24, the contact area between the pipe 30 and the rotary grindstones 24 is larger than in the case of one rotary grindstone. Thereby, the grinding time of the pipe | tube 30 can be shortened.

  The driving force connecting member 23 connects the rotary shaft 21 and the rotary grindstones 24a and 24b, respectively. Further, by providing the grindstone rotation axis AX of the rotary grindstones 24a and 24b on the lower side of the rotary shaft 21, the rotary grindstones 24a and 24b contact the inner surface of the range of the central angle less than 180 ° of the pipe 30. Thereby, the inner surface of a plurality of tubes with different inner diameters can be ground. That is, even if the pipe 30 is changed to another pipe having a different inner diameter, it is not necessary to change the inner pipe surface treatment apparatus 1A. Therefore, since it is not necessary to prepare an in-pipe surface treatment apparatus for every pipe with which internal diameters differ, the cost concerning in-pipe surface treatment can be reduced.

  As described above, in the attachment device 20A of the present embodiment, two sets of rotary grindstones 24a and 24b that rotate in reverse are provided.

  As a result, in the present embodiment, as shown in FIG. 3, one forward rotation gear box 23 a of the driving force connecting member 23 has, for example, three gears G, and the other reverse rotation gear. The box 23 b has four gears G.

  As a result, by using the forward rotation gear box 23a and the reverse rotation gear box 23b as the driving force connecting member 23, it is possible to mutually rotate the two sets of rotary grindstones 24a and 24b. . In the case where a pulley and an endless belt are used as the driving force connecting member 23, it is conceivable to cross and endlessly rotate the endless belt.

  Further, in the inner surface treatment apparatus 1A of the present embodiment, as shown in FIG. 2, an inter-axial distance fixing member 50 is provided between the grindstone rotation axes AX of the two rotary grindstones 24. This can prevent the distance between the grinding wheel rotation axes AX from fluctuating.

  Here, in the present embodiment, as the rotary grindstone 24 as the rotary grinding member, for example, a resinoid grindstone in which abrasive grains are solidified with a resin is used. The material of the abrasive grains is, for example, diamond, CBN (cubic boron nitride) or the like. However, the rotary grinding member in one aspect of the present invention is not necessarily limited to the grindstone, and for example, a wire brush, abrasive paper, a blade, an abrasive drum, etc. can be used.

  Further, in the present embodiment, as shown in FIG. 1, the set of rotary grindstones 24 is, for example, three rows of grindstones. For example, a spacer may be provided between the three rows of grinding wheels. As a result, the grinding area in the longitudinal direction of the tubes 30 is increased, so that the grinding time of one tube 30 can be shortened. Further, by arranging the plurality of rotary grindstones 24 in the longitudinal direction of the pipe 30, the parallelism between the contact surface of the rotary grindstone 24 and the inner surface of the pipe 30 can be enhanced. Contact with the inner surface (so-called one-sided contact) can be prevented. Further, when the spacer is provided, the heat radiation property of the rotary grindstone 24 is improved, and the grinding debris generated by grinding can be easily removed from the rotary grindstone 24, so that the grinding efficiency is improved.

  Next, the contact member 25 of the present embodiment will be described based on FIG. 2 and FIG. FIG. 5 is a front view showing the configuration of the contact member 25 attached to the attachment device 20A.

  As shown in FIG. 2, the attachment device 20A extends from the opposing member 29 via the height adjustment member 28 to fix each relative position of the rotary grindstone 24 to the rotary shaft 21 to each driving force connecting member 23. An abutting member 25 that abuts is provided. Thereby, since the relative position of the rotary grindstone 24 to the rotary shaft 21 is fixed by the contact member 25, the rotary grindstone 24 can be prevented from rotating around the rotary shaft 21 in the circumferential direction of the pipe 30. . Therefore, the inner surface of the tube 30 can be ground stably by holding the position of the rotary grindstone 24 stably.

  The contact member 25 holds a part of the driving force connecting member 23 away from the rotation shaft 21. As a result, since the part away from the rotating shaft 21 is pressed, the rotary grinding stone 24 can be pressed toward the inner surface of the tube 30 with a larger force (torque).

  Further, as shown in FIG. 5, the contact member 25 includes an upper stay 25a, a lower stay 25b, a spring 25c as an elastic member, and a contact portion 25d. The upper stay 25a and the lower stay 25b are connected via two springs 25c. Note that dampers attached to the upper stay 25a and the lower stay 25b may be provided inside the spring 25c. Thereby, the movement of the spring 25c can be suppressed, and the vibration of the spring 25c can be reduced. Also, the spring 25c may be, for example, an air spring or a leaf spring, and may be a hydraulic damper instead of the spring 25c.

  As shown in FIG. 2, the upper stay 25a has a horizontal portion extending outward from the center toward the inner surface of the tube 30, and a bent portion continuing from the horizontal portion. The horizontal portion is in contact with the lower end of the height adjustment member 28, and the bent portion is parallel to the upper surface of the driving force connecting member 23.

  The lower stay 25b, like the upper stay 25a, has a horizontal portion and a bent portion, whereby the lower stay 25b is parallel to the upper stay 25a.

  A spring 25c is attached between the lower surface of the bent portion of the upper stay 25a and the upper surface of the bent portion of the lower stay 25b. The spring 25 c applies an elastic force toward the inner surface of the tube 30 to the driving force connecting member 23.

  An abutment portion 25d is attached to the lower surface of both outer portions of the lower stay 25b, and the abutment portion 25d abuts on the upper surface of the driving force connecting member 23. It is preferable that the contact part 25d has elasticity, such as rubber | gum which has elasticity, for example. However, the contact portion 25d may be a rigid body.

  Here, a guide rod 27 is erected and fixed to the parallel portion of the lower stay 25b, and the guide rod 27 is loosely fitted in an opening (not shown) of the upper stay 25a. As a result, the upper stay 25a does not move largely in the horizontal direction with respect to the lower stay 25b.

  Next, the opposing member 29 of the present embodiment will be described based on FIGS. 1 and 2.

  In the related art, a rotating roller or grinding roller is provided in contact with the inner surface of the pipe facing the inner surface of the pipe in contact with the rotating grinding member to obtain a force opposing the reaction force of the rotating grinding member. This is because this configuration can easily and inexpensively obtain a force that opposes the reaction force.

  However, in the case of such a configuration, when the inner diameter of the pipe changes, it is not possible to obtain a force that opposes the reaction force of the rotary grinding member. For example, when the inner diameter of the tube is increased, the rotating roller or the grinding roller does not contact the inner surface of the tube, so that a force against the reaction force can not be obtained. On the other hand, when the inner diameter of the pipe is reduced, the rotary grinding member and the rotating roller or grinding roller can not be inserted into the pipe.

  In addition, the tube may not necessarily be a perfect circle, and if it is not a perfect circle, a constant force against the reaction force can not be obtained, which means that the grinding roller is at a constant pressure on the inner surface of the tube. It is impossible to press it, and there is also a problem that the grinding accuracy is lowered. In addition, if the grinding roller is pressed against the inner surface of the pipe, the rotating shaft may be broken. In addition, the grinding roller sometimes bounces.

  Therefore, in the pipe inner surface treatment apparatus 1A in the present embodiment, as shown in FIG. 1, the opposing member 29 that applies a force against the reaction force from the rotary grinding stone 24 is inserted into the pipe 30. And as shown also in FIG. 2, the opposing member 29 is provided in non-contact with the inner surface of the pipe | tube 30. As shown in FIG.

  That is, the opposing member 29 of the present embodiment includes a cantilever member made of, for example, H steel cantilevered so as to be insertably supported on the pipe 30, and also includes a height adjusting member 28 described later and an elastic member in part. And the abutment member 25 having the above-mentioned spring 25c. The cantilever member is not limited to H steel but may be steel having a square cross section.

  The cantilevered member of the opposing member 29 is fixed to, for example, the upper ends of the front standing post 15 and the rear standing post 16 in the traveling carriage 10, and the fixed portion is a fixed end of the cantilevered member.

  Further, as shown in FIG. 2, an abutting member 25 is fixed to the free end side of the cantilever member of the opposing member 29 via a height adjusting member 28. The height adjustment member 28 is to be replenished so as to be continuous between the free end of the cantilever member of the opposing member 29 and the contact member 25, and the height adjustment member 28 is provided between the free end of the cantilever member and the contact member 25. It consists of a member whose height is adjusted according to the distance between them.

  The operation of grinding the inner surface of the pipe 30 in the inner surface processing apparatus 1A having the above-described configuration will be described below.

  First, as shown in FIGS. 1 and 2, the tube 30 is placed on the two rotating rollers 32. The rotating roller 32 is rotated by the rotating roller motor 31 and rotates the mounted tube 30.

  Next, the height of the rotary shaft 21 is adjusted by a lifting device (not shown) provided on the traveling carriage 10 within the expansion range of the spring 25 c so that the rotary shaft 21 and the rotary grindstone 24 fit within the inner diameter of the tube 30. That is, when the rotary grindstone 24 is inserted into the tube 30, the height of the rotary shaft 21 is raised by the lifting device. At this time, the spring 25c is compressed, and the distance between the opposing member 29 and the rotation shaft 21 approaches. After the insertion, in order to bring the rotary grinding stone 24 into contact with the inner surface of the tube 30, the height of the rotary shaft 21 is lowered by the lifting device. As a result, the spring 25c extends and the distance between the opposing member 29 and the rotation shaft 21 increases. As described above, in the present embodiment, the rotary shaft 21 can be moved up and down within the expansion and contraction range of the spring 25c. In the present embodiment, the height of the rotating shaft 21 is adjusted, but not limited to this, the height of the tube 30 can also be adjusted.

  Thereafter, the traveling carriage 10 is advanced to the tube 30 side, and the rotary grinding stone 24 is inserted into the inside of the tube 30.

  Next, the rotary shaft 21 is rotated, and the height of the rotary shaft 21 is precisely adjusted again by the elevating device so that the rotary grindstone 24 contacts the inner surface of the tube 30. Then, while the pipe 30 is rotating, the traveling carriage 10 is fed at a low speed in the direction of the pipe 30 while maintaining the rotating grindstone 24 in contact with the inner surface of the pipe 30. Thus, since the tube 30 is rotated by the rotating roller 32, the inner surface of a part of the tube 30 in the longitudinal direction is ground, and the advancing direction of the traveling carriage 10 causes the longitudinal direction of the inner surface of the tube 30 to Grinding process.

  During this grinding process, the opposing member 29 that exerts a force on the rotary grindstone 24 against the reaction force from the inner surface of the tube 30 with which the rotary grindstone 24 contacts does not contact the inner surface of the tube 30. Therefore, for example, even if the pipe 30 is not a perfect circle, the opposing member 29 can press the rotary grindstone 24 against the inner surface of the pipe 30 with a constant pressure, and it is possible to suppress a reduction in grinding accuracy.

  When the grinding process of the inner surface of the pipe 30 is finished and the rotary grindstone 24 protrudes outward from the back end in the longitudinal direction of the pipe 30, the rotation of the rotary shaft 21 and the rotary grindstone 24 is stopped, and the lifting device Then, the height of the rotating shaft 21 is adjusted to move the traveling carriage 10 backward. Thereby, the rotating grindstone 24 can be pulled out without contacting the inner surface of the tube 30.

  Next, the next pipe 30 is ground. In this case, even if the inner diameter of the tube 30 is different from the inner diameter of the previous tube 30, the opposing member 29 is provided in non-contact with the inner surface of the tube 30 in the inner surface treatment apparatus 1A of this embodiment. As a result, regardless of the inner diameter of the tube 30, the opposing member 29 can exert a force that opposes the reaction force from the rotary grindstone 24 in the same processing as the previous time.

  Therefore, it is possible to provide the inner surface processing apparatus 1A capable of grinding the inner surface without having to replace the rotating grindstones 24 having different sizes with the pipes 30 having different inner diameters.

  In the present embodiment, it is also conceivable that the traveling carriage 10 is lifted due to the reaction force from the pipe 30 during the grinding process of the pipe 30. In that case, it is possible to provide the traveling carriage 10 with a balance weight or a mechanism for preventing separation of the rail 2 and the wheel 11.

  Thus, in the pipe inner surface treatment apparatus 1A according to the present embodiment, the upper guide member 22a and the lower guide as supporting members having the second bearing 22c as a bearing at a place which is supported at one side and inserted into the tube 30 A rotary grinding wheel 24 as a rotary grinding member driven by the member 22b, the rotary shaft 21 supported by the second bearing 22c at a position inserted into the tube 30, and contacting the inner surface of the tube 30; An upper guide member 22a having a second bearing 22c and a lower guide member which is provided on the inner surface of the noncontacting surface 30 and exerts a force against the reaction force from the inner surface of the tube 30 in contact with the rotary grindstone 24 A counter member 29 different from 22b is provided.

  As a result, the opposing member 29 can exert a force against the reaction force from the rotary grindstone 24 regardless of the inner diameter of the tube 30. Therefore, it is possible to provide the inner surface processing device 1A capable of grinding the inner surface of the tubes 30 having different inner diameters.

  Further, in the pipe inner surface treatment apparatus 1A in the present embodiment, the opposing member 29 includes a cantilever member supported in a cantilever manner so as to be inserted into the pipe 30. Thereby, the specific configuration of the opposing member 29 can be provided.

  Further, in the inner surface treatment apparatus 1A in the present embodiment, the opposing member 29 includes a spring 25c as an elastic member, and applies an elastic force to the rotary grindstone 24 through the spring 25c. As a result, when the rotary grindstone 24 relatively moves along the inner periphery of the pipe 30, a large load is applied during the grinding process of the rotary grindstone 24 due to the unevenness of the inner surface of the pipe 30, and Movement along the inner circumference is not stopped or suppressed.

  Further, in the pipe inner surface treatment apparatus 1A according to the present embodiment, two springs 25c as the elastic members are provided, and the plurality of springs 25c sandwich the vertical surface including the rotation shaft 21. The elastic force of the plurality of springs 25c is a component force whose direction is the vertical surface side.

  Thus, it is possible to suppress the occurrence of a deviation between the direction in which the reaction force of the rotary grindstone 24 acts and the direction in which the force opposing the reaction force in the opposing member 29 acts. As a result, it is possible to efficiently apply a force opposing the reaction force at the opposing member 29 to the rotary grindstone 24.

  Further, in the inner surface treatment apparatus 1 </ b> A in the present embodiment, the rotary grindstone 24 is provided below the rotary shaft 21. As a result, gravity acts on the rotary grindstone 24, so that the reaction force at the opposing member 29 can be reduced.

Second Embodiment
It will be as follows if other embodiment of this invention is described based on FIG. FIG. 6 is a side view showing the configuration of the attachment device 20B of the inner surface processing device 1B in the present embodiment.

  As shown in FIG. 6, the attachment device 20B of the inner surface treatment device 1B of the present embodiment is compared to the upper stay 25a and the lower stay 25b of the contact member 25 in the inner surface treatment device 1A of the first embodiment. The difference is that long upper stays 45a and lower stays 45b of the arms (i.e., the distances extending outward) are changed.

  That is, in the pipe inner surface processing apparatus 1B of the present embodiment, the position of the spring 45c is farther from the rotation shaft 21 than in the pipe inner surface processing apparatus 1A. Further, below the spring 45c, a portion closer to the grindstone rotation axis AX than the rotary shaft 21 in the driving force connecting member 23 is located via the lower stay 45b and the contact portion 45d. As a result, the elastic force (torque) applied by the spring 45c to the driving force connecting member 23 via the contact portion 45d is further increased.

  Further, since the contact portion 45d is located on the lower side of the spring 45c via the lower stay 45b, the contact portion 45d contacts a portion closer to the grinding wheel rotation axis AX than the rotation shaft 21 in the driving force connecting member 23. There is.

Third Embodiment
Still another embodiment of the present invention will be described below with reference to FIG. FIG. 7 is a side view showing the configuration of the attachment device 20C in the in-pipe surface treatment device 1C of the present embodiment.

  As shown in FIG. 7, the attachment device 20C of the inner surface treatment device 1C of the present embodiment has a height adjustment member 28 compared to the attachment device 20A of the inner surface treatment device 1A of the first embodiment. The difference is not in the

  That is, in the attachment device 20C of the inner surface treating device 1C of the present embodiment, the height adjustment member 28 which existed in the attachment device 20A in the inner surface treating device 1A of the first embodiment does not exist. As described above, if the height of the lower end surface of the opposing member 29 matches the height of the upper end surface of the contact member 25, there is no need to provide the height adjustment member 28. Thereby, the number of parts can be reduced and the structure can be simplified.

Fourth Embodiment
Yet another embodiment of the present invention will be described below with reference to FIG. FIG. 8 is a side view showing the configuration of an attachment device 20D in the inner-tube surface treatment device 1D of the present embodiment.

  The attachment device 20D of the inner-tube surface treatment device 1D of the present embodiment, as shown in FIG. 8, is a contact member compared to the contact members 25 and 45 of the attachment devices 20A to 20C of the first to third embodiments. The shape of 62 is different, and the attachment position of the spring 60c as an elastic member is different.

  That is, the attachment device 20D of the inner-tube surface treatment device 1D of the present embodiment includes the contact member 62 instead of the contact member 25. The contact member 62 includes a lower stay 62a and a contact portion 65d. The lower stay 62 a is attached to the third bearing 60 d so that the bent portion is parallel to the top surface of the driving force connecting member 23. The contact portion 65d is attached to the lower surface of both outer portions of the lower stay 62a.

  Further, in the present embodiment, a spring 60c as an elastic member is provided. In the present embodiment, the spring 60c is attached between the lower support 60b attached to the third bearing 60d and the upper support 60a provided on the upper side of the lower support 60b.

  Further, a cantilevered member of the opposing member 69 is attached to the upper surface of the upper support portion 60a. In FIG. 8, the opposing member 69 includes a cantilever member made of steel having an angular cross section, but includes a cantilever member made of H steel in the same manner as the opposing member 29 of the first embodiment. It may be

  Thus, the attachment device 20D is provided with a spring 60c between the opposing member 69 and the abutting member 62 for applying an elastic force toward the inner surface of the tube 30 to the driving force connecting member 23. Therefore, by applying an elastic force toward the inner surface of the tube 30 to the driving force connecting member 23 by the spring 60 c, the rotary grindstones 24 a and 24 b are pressed toward the inner surface of the tube 30. As a result, bouncing of the rotary grindstones 24a and 24b can be reduced, and the rotary grindstones 24a and 24b can be pressed toward the inner surface of the tube 30 with a force that is more nearly constant.

[Supplement]
The inner surface processing apparatus according to one aspect of the present invention is driven by the rotary shaft insertable into a pipe, a support member supported in a cantilever manner so as to be insertable into the pipe, and the rotary shaft to contact the inner surface of the pipe. In addition, a plurality of rotational grinding members having different axis positions, a plurality of driving force connecting members respectively connecting the rotational shaft and the rotational grinding members, and the relative positions of the rotational grinding members with respect to the rotational axis And an abutment member extending from the support member and abutting on each of the driving force connecting members.

  According to the above configuration, since the inner surface processing apparatus includes a plurality of rotary grinding members, the contact area between the pipe and the rotary grinding members is larger than in the case where only one rotary grinding member is used. This makes it possible to shorten the pipe grinding time. Further, since the relative position of the rotary grinding member to the rotary shaft is fixed by the contact member, the rotary grinding member can be prevented from rotating in the circumferential direction of the pipe around the rotary shaft. Therefore, the inner surface of the pipe can be stably ground by stably holding the position of the rotary grinding member.

  The in-pipe surface treatment apparatus according to one aspect of the present invention further includes an elastic member for applying an elastic force toward the inner surface of the pipe to the driving force connecting member between the support member and the contact member. Is preferred.

  According to the above configuration, the rotational grinding member is pressed toward the inner surface of the pipe by applying an elastic force toward the inner surface of the pipe to the driving force connecting member by the elastic member. This can reduce the bouncing of the rotary grinding member, and can press the rotary grinding member toward the inner surface of the pipe with a force that is more nearly constant.

  In the inner surface treatment apparatus according to one aspect of the present invention, it is preferable that the contact member presses a portion of the driving force connecting member away from the rotation axis.

  According to the above configuration, since the part away from the rotation axis is pressed, the rotation grinding member can be pressed toward the inner surface of the pipe with a larger force.

  In the inner surface treatment apparatus according to one aspect of the present invention, rotation of the rotary grinding member provided on one side with respect to the plane including the rotary shaft is rotation of the rotary grinding member provided on the other side. It is preferable that the direction is opposite to the direction.

  According to the above configuration, the rotational direction of the rotational grinding member provided on one side with respect to the plane including the rotational axis is opposite to the rotational direction of the rotational grinding member provided on the other side. The relative position of these rotary grinding members with respect to the rotary shaft can be stably held. Thus, the inner surface of the tube can be ground stably.

  In the inner surface treatment apparatus in one aspect of the present invention, preferably, the plurality of rotary grinding members are in contact with the inner surface in the range of a central angle of less than 180 ° of the pipe.

  According to the above configuration, since the plurality of rotary grinding members contact the inner surface of the range of the central angle of the tube less than 180 °, the inner surfaces of the plurality of tubes having different inner diameters can be ground. That is, even if it changes to another pipe | tube with a different internal diameter, it is not necessary to change a pipe surface treatment apparatus. Therefore, since it is not necessary to prepare an in-pipe surface treatment apparatus for every pipe with which internal diameters differ, the cost concerning in-pipe surface treatment can be reduced.

  A tube inner surface treatment apparatus according to one aspect of the present invention includes: a rotating shaft insertable into a tube; and a plurality of rotating grinding members driven by the rotating shaft and in contact with the inner surface of the tube and having different shaft positions. The rotational direction of the rotational grinding member provided on one side with respect to the plane including the rotational axis is opposite to the rotational direction of the rotational grinding member provided on the other side, The rotary grinding member is provided on the lower side of the rotary shaft, and each rotary grinding member is rotated toward the bottom of the pipe on the side in contact with the inner surface of the pipe. And

  According to the above configuration, as described above, since the inner surface processing apparatus includes a plurality of rotary grinding members, the contact area between the pipe and the rotary grinding members is larger than in the case where only one rotary grinding member is used. . This makes it possible to shorten the pipe grinding time. Further, with respect to the plane including the rotation axis, the rotation direction of the rotation grinding member provided on one side is opposite to the rotation direction of the rotation grinding member provided on the other side. The relative position of the rotating grinding member can be stably held. Thus, the inner surface of the tube can be ground stably.

  Furthermore, as each rotary grinding member rotates towards the bottom of the pipe on the side in contact with the inner surface of the pipe, these rotary grinding members are directed in the direction opposite to the direction towards the bottom of the pipe Due to this, the relative position of these rotary grinding members with respect to the rotary shaft can be held more stably.

  The present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the claims, and the technical means disclosed in different embodiments can be combined as appropriate. The embodiments of the present invention are also included in the technical scope of the present invention. Furthermore, new technical features can be formed by combining the technical means disclosed in each embodiment.

1A to 1D Inner pipe surface treatment device 10 traveling carriage 11 wheel 12 rotary shaft drive motor 13 wheel drive motor 14 support column 14a first bearing (bearing)
15 Front Standing Column 16 Rear Standing Column 20A to 20D Attachment Device 21 Rotary Shaft 24 Rotating Stone 22a Upper Guide Member 22b Lower Guide Member 22c Second Bearing (Bearing)
23 Drive Force Connecting Member 23a Gearbox 23b for Positive Rotation Gearbox 24 for Reverse Rotation Rotating Stone (Rotary Grinding Member)
24a ・ 24b Rotary grinding wheel (Rotary grinding member)
25 Contact member (rotational grinding member)
25a upper stay 25b lower stay 25c spring (elastic member)
25d Contact portion 28 Adjustment member 29 Counter member 31 Motor for rotation roller 32 Rotation roller 45 Contact member 50 Distance between axes fixed member 60a Upper support portion 60b Lower support portion 60c Spring (elastic member)
60d third bearing 62 abutment member 62a lower stay 65d abutment portion 69 opposing member

Claims (5)

A support member which is cantilevered and which has a bearing at the point where it is inserted into the pipe;
A portion inserted into the pipe is a rotary shaft supported by the bearing;
A rotary grinding member driven by the rotary shaft and in contact with the inner surface of the tube;
An opposing member different from the supporting member having the bearing, which is provided on the inner surface of the pipe in a non-contact manner and exerts a force on the rotational grinding member against the reaction force from the inner surface of the pipe contacting the rotational grinding member And a pipe inner surface treatment apparatus characterized in that   The inner surface treatment apparatus according to claim 1, wherein the opposing member includes a cantilever member which is supported in a cantilever manner so as to be inserted into the pipe. The opposing member includes an elastic member,
The inner surface treatment apparatus according to claim 2, wherein the cantilever member applies an elastic force to the rotary grinding member via the elastic member. A plurality of the elastic members are provided, and
The plurality of elastic members are provided to sandwich the vertical surface including the rotation axis, and the elastic force of the plurality of elastic members has a component force whose direction is the vertical surface side. The pipe inner surface treatment apparatus according to claim 3, characterized in that   The in-pipe surface treatment apparatus according to any one of claims 1 to 4, wherein the rotary grinding member is provided below the rotation shaft.

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