JP2004291148A - Pipe peripheral processing equipment - Google Patents

Abstract

An object of the present invention is to provide a pipe outer peripheral processing device capable of performing machining along the outer circumference of a pipe with a simple structure.
A rotating frame (12) rotatably arranged along the outer periphery of an insertion opening (4) and being mechanically connected to the rotation frame (12) mounted on the outer periphery of the insertion opening (4) to rotate the rotating frame (12). A guide ring 13 capable of positioning the rotating frame 12 with respect to the axial direction of the slot 4, and a guide ring 13 supported by the rotating frame 12 and extending along the circumferential direction of the slot 4 when the rotating frame 12 rotates. And a grinder 14 that can be machined.
[Selection diagram] Fig. 1

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an apparatus for processing an outer periphery of a pipe.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, as a joint part of a cast iron pipe having an earthquake-resistant function, for example, there is a joint having a structure as shown in FIG. That is, a lock ring receiving groove 2 is formed on the inner periphery of the receiving port 1 of one of the pipes constituting the joint portion, and the lock ring 3 is received in the lock ring receiving groove 2 in the circumferential direction. . On the outer periphery of the distal end of the insertion port 4 of the other pipe inserted into the receiving port 1, an insertion projection 6 having a tapered tapered surface 5 is formed, and the lock ring 3 is accommodated therein. The insertion port 4 is inserted into the receiving port 1 in the state of being inserted, and the insertion projection 6 can engage the lock ring 3 from the back side of the receiving port. Thereby, a separation preventing function is provided between the receiving port 1 and the insertion port 4. In addition, the insertion opening 4 is extendable and retractable with respect to the reception port 1 by an amount by which the insertion projection 6 can move between the lock ring 3 and the rear end surface 1a of the reception port 1. An expansion / contraction function is provided between the insertion opening 4 and the insertion opening 4. The tapered surface 5 serves as a guide when inserting the insertion port 4 into the reception port 1 in which the lock ring 3 is housed.
[0003]
Such an insertion protrusion 6 is usually formed using an appropriate device in a pipe manufacturing factory. However, when a pipe having no insertion protrusion is generated by a cut pipe at a pipe construction site. In this case, it is necessary to form a new insertion projection on the outer periphery of the pipe at this site. Therefore, a method for forming an insertion projection on the outer periphery of an insertion port having no insertion projection at a pipe construction site will be described with reference to FIG.
[0004]
As shown in FIG. 7, first, an annular outer peripheral groove 7 is formed along the outer periphery of the insertion opening 4 by using a groove processing machine, for example, a grinder, and a circumferentially split protruding ring 8 is formed in the outer peripheral groove 7. Inset. Then, connecting pieces (not shown) are erected at both ends of the protruding ring 8, and the connecting pieces and both ends of the protruding ring 8 are fastened using blind rivets, and inserted into the outer periphery of the insertion port 4. The mouth projection 6 is formed.
[0005]
As described above, in order to form the insertion projection 6 on the outer periphery of the insertion port 4 at the pipe construction site, it is necessary to form the annular outer peripheral groove 7 on the outer circumference of the insertion port 4. However, as shown in FIG. 8, when groove processing is performed on the outer periphery of the insertion port 4 in a state where one end side of the pipe is buried in the ground 9, the insertion port 4 cannot be freely rotated around the axis. It is necessary to rotate the grinder straight along the circumferential direction of the insertion opening 4, that is, so as not to move with respect to the axial direction of the tube.
[0006]
Therefore, when the insertion opening 4 cannot be freely rotated around the axis as described above, a groove can be formed along the outer periphery of the pipe as described in Patent Document 1. Use a simple processing device. That is, this device uses a driving means to move the cutting machine body, which is attached to the outer circumference of the pipe with the chain with rollers attached thereto, in a circumferential direction along a guide ring mounted on the outer circumference of the pipe. It is moved, and at this time, the cutting machine body performs machining along the outer periphery of the pipe.
[0007]
[Patent Document 1]
JP-A-8-323532 (page 4, FIG. 1)
[0008]
[Problems to be solved by the invention]
However, in the technique described in Patent Document 1, for example, a chain with rollers for attaching a cutting machine body to a pipe, a driving unit including a plurality of power transmission shafts and an endless belt, and the like are used, so that the entire apparatus is complicated. Resulting in a very expensive structure as a whole.
[0009]
Therefore, an object of the present invention is to solve such a problem and to provide an apparatus for processing the outer periphery of a pipe which can perform machining along the outer circumference of the pipe with a simple structure.
[0010]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, the invention according to claim 1 is characterized in that a rotating frame rotatably arranged along an outer periphery of a tube, and mounted on the outer periphery of the tube and mechanically connected to the rotating frame. A guide ring capable of positioning the rotating frame with respect to the axial direction of the tube when the rotating frame rotates, and a guide ring supported by the rotating frame and rotating the rotating frame when the rotating frame rotates. And a machine capable of performing machining along the circumferential direction.
[0011]
According to such a configuration, when the rotating frame positioned in the axial direction of the tube by the guide ring is rotated, for example, manually along the outer periphery of the tube, the rotating frame is supported by the rotating frame. The machine can be freely rotated along the outer circumference of the tube together with the rotating frame. Accordingly, it is possible to perform machining along the outer periphery of the pipe with a simple structure having only the rotating frame, the guide ring, and the processing machine attached to the rotating frame. Further, since the processing machine can be freely moved along the outer circumference of the pipe, it is possible to perform machining on the outer circumference of a pipe such as a buried pipe which cannot be freely rotated around an axis. Further, since the rotating frame is positioned with respect to the axial direction of the pipe by the guide ring, the processing machine can be rotated along the circumferential direction of the pipe, that is, without being displaced with respect to the axial direction. .
[0012]
According to a second aspect of the present invention, in the outer peripheral processing apparatus according to the first aspect, a shock absorbing member disposed between the processing machine and the rotating frame can absorb a shock in a pipe diameter direction acting on the processing machine. It is said that.
[0013]
According to such a configuration, the shock absorber in the pipe diameter direction acting on the processing machine can be absorbed by disposing the buffer member between the processing machine and the rotating frame. Can be prevented from acting.
[0014]
According to a third aspect of the present invention, there is provided the outer peripheral machining apparatus according to the first or second aspect, further comprising a plurality of frame supporting portions for supporting the rotating frame with respect to the pipe, wherein an elastic body is arranged between the rotating frame and the rotating frame. Thereby, a dimensional change between the rotating frame and the outer peripheral surface of the tube can be absorbed.
[0015]
According to such a configuration, it has a plurality of frame supporting portions for supporting the rotating frame with respect to the pipe, and the elastic body is arranged between the rotating frame and the outer peripheral surface of the rotating frame and the pipe. It is possible to absorb a dimensional change between.
[0016]
BEST MODE FOR CARRYING OUT THE INVENTION
A method of performing a groove process as a mechanical process on the outer periphery of an insertion port at a piping construction site, for example, using the apparatus for processing a pipe periphery according to the embodiment of the present invention will be described with reference to FIGS. 1 to 5. The same components as those used in the related art are denoted by the same reference numerals as those used in FIGS. 6 to 8, and detailed description thereof will be omitted.
[0017]
As shown in FIGS. 1 and 2, a pipe outer peripheral processing apparatus 10 according to an embodiment of the present invention includes a plurality of, for example, four support rollers 11 ( The rotation frame 12 is supported in a centered state with respect to the insertion opening 4 by the center of the insertion opening 4 and is rotatable along the outer periphery of the insertion opening 4. The rotary frame 12 is mounted on the outer periphery of the insertion port 4 at a position where the rotation frame 12 is placed, and is mechanically connected to the rotation frame 12 so that the rotation frame 12 can be positioned with respect to the axial direction of the insertion port 4 at the time of rotation. A possible guide ring 13 and a processing machine that is supported by the rotating frame 12 and that can machine the outer periphery of the insertion opening 4 along the circumferential direction when the rotating frame 12 rotates, for example, groove processing. Grinder And a 4. The grinder 14 is a commercially available one.
[0018]
In detail, the rotating frame 12 is entirely formed of, for example, a metal thin plate, and has an annular portion 12a formed in an annular shape, and a part of the annular portion 12a in the circumferential direction is formed in a rectangular shape toward the outside in the radial direction. And a protruding rectangular portion 12b. A dividing portion 12c that divides the rotating frame 12 in the circumferential direction is provided at one position in the circumferential direction of the annular portion 12a, and a hinge 15 is provided at a position facing the dividing portion 12c in the pipe radial direction. . Thus, the rotating frame 12 can be opened and opened around the hinge 15. A pair of flanges 12d is formed at a position corresponding to the divided portion 12c in the annular portion 12a, and the pair of flanges 12d are fastened to each other by bolts and nuts 16. Accordingly, the rotating frame 12 can be disposed on the outer periphery of the insertion port 4 so as to cover the rotation frame 12 from the outside of the insertion port 4 without passing the insertion port 4 through the inside of the rotation frame 12. Handles 12e, 12e that can be handled by an operator are provided at, for example, two positions on the outer periphery of the annular portion 12a.
[0019]
A bracket 12f is formed on the rectangular portion 12b of the rotating frame 12 toward the inner side of the insertion hole in the axial direction, and the end of the bracket 12f has a cross section inward in the pipe diameter direction. A guide portion 17 having a U-shaped opening is formed. The guide portion 17 is arranged on the guide ring 13 in a state where the guide ring 13 is fitted into the concave portion 17a which is a depressed portion, and is in contact with both end surfaces of the guide ring 13 in the axial direction. I have. Thereby, the rotating frame 12 and the guide ring 13 are mechanically connected, and the rotating frame 12 can rotate along the guide ring 13 straight in the circumferential direction of the insertion opening 4, that is, without rotating in the axial direction. it can. At this time, if the roller 17b is arranged between the guide portion 17 and the outer periphery of the insertion opening 4, the guide portion 17 can move smoothly along the outer periphery of the insertion opening 4. Although not shown, the guide ring 13 is divided into two parts in the circumferential direction, so that the insertion hole 4 is not inserted inside the guide ring 13 as in the case of the rotating frame 12. The guide ring 13 can be placed over the outside of the insertion opening 4.
[0020]
The rectangular frame 12 b of the rotating frame 12 is provided with a grinder support 18 capable of holding the grinder 14 with the outer periphery of the insertion opening 4. The grinder support portion 18 is formed in an arc shape in accordance with the shape of the cover portion 14b for protecting the rotary blade 14a of the grinder 14, and has a concave portion 18a having a U-shaped cross section and a concave portion thereof. A rotary blade holding portion 18b capable of stably holding the cover portion 14b in the pipe diameter direction and the axial direction by fitting the cover portion 14b into the cover portion, and a pipe diameter from the rotary blade holding portion 18b. A screw rod 18c, which is formed so as to protrude outward in the direction, a part of which protrudes from a round hole 12g formed in the rectangular part 12b of the rotating frame 12 and has an external thread, and a rectangular part of the screw rod 18c The screw rod 18c is screwed into the portion protruding outside of the rectangular portion 12b and comes into contact with the outer surface of the rectangular portion 12b, so that the threaded rod 18c faces inward in the radial direction of the tube. A nut 18d capable of adjusting the amount of protrusion, that is, the depth of cut into the outer periphery of the insertion opening 4 by the rotary blade 14a, and a screw rod 18c between the rotary blade holding portion 18b and the inside of the rectangular portion 12b. And a coil spring 18e as a cushioning member, which is arranged in a state where is inserted.
[0021]
Further, as described above, the rotating frame 12 can be supported in a centered state with respect to the outer periphery of the insertion opening 4 at four positions at a constant distance in the circumferential direction on the inner periphery of the annular portion 12a. A possible support roller 11 is provided, and since the support roller 11 is movable along the outer periphery of the insertion slot 4, the rotating frame 12 can be rotatable with respect to the outer periphery of the insertion slot 4. .
[0022]
As shown in FIGS. 3 and 4, the support roller 11 that supports the rotating frame 12 with respect to the insertion opening 4 includes a cylindrical main body 11 a and a main body 11 a provided in the opening on the inner side in the radial direction of the pipe. A claw portion 11b having a smaller diameter than the inner diameter of the portion 11a; a roller support plate 11c disposed inside the main body portion 11a and capable of engaging with the claw portion 11b from the outside in the tube radial direction; And a coil spring 11 e as an elastic body disposed between the roller support plate 11 c and the inner periphery of the annular portion 12 a of the rotating frame 12.
[0023]
In such a configuration, in order to form the annular groove 7 on the outer periphery of the insertion opening 4, a guide ring 13 is mounted at a predetermined position on the outer periphery of the insertion opening 4 as shown in FIGS. 1 and 2. Then, with the cover portion 14b of the grinder 14 fitted in the rotary blade holding portion 18b of the grinder support portion 18 attached to the rotary frame 12, the rotary frame 12 is opened by opening the hinge 15 as a center, and the rotary frame 12 is opened. The grinder 12 and the grinder 14 are arranged on the outer periphery of the insertion opening 4. At this time, the guide ring 13 is fitted into the concave portion 17a of the guide portion 17. Thus, since the guide portion 17 is positioned in the axial direction by the guide ring 13, the rotating frame 12 and the grinder 14 can be positioned with respect to the axial position of the insertion opening 4.
[0024]
When the rotating frame 12 and the grinder 14 are arranged at predetermined positions on the outer periphery of the insertion opening 4, the pair of flanges 12 d of the annular portion 12 a are fastened to each other by bolts and nuts 16, and the rotating frame 12 and the grinder 14 are connected to the outer periphery of the insertion opening 4. From falling off. In addition, since the support rollers 11 are provided at four positions at a certain distance in the circumferential direction on the inner periphery of the annular portion 12a, the rotating frame 12 is supported in a centered state with respect to the insertion opening 4. can do.
[0025]
At this time, as shown in FIG. 3, when the diameter of the insertion opening 4 is small and the gap S between the inside of the annular portion 12a and the outer periphery of the insertion opening 4 reaches the maximum Smax, the inside of the main body 11a of the support roller 11 is The coil spring 11e, which is arranged at a distance between the inner side of the annular portion 12a and the roller support plate 11c, can be sufficiently extended until the roller support plate 11c comes into contact with the claw portion 11b. It can correspond to the mouth 4. Thus, the rotating frame 12 can be supported in a stable state with respect to the insertion opening 4. Further, as shown in FIG. 4, when the diameter of the insertion opening 4 is large and the gap S between the inside of the annular portion 12a and the outer periphery of the insertion opening 4 becomes the minimum Smin, the roller to which the rotating roller 11d is attached is attached. The support plate 11c compresses the coil spring 11e, and the coil spring 11e can be sufficiently contracted between the inside of the annular portion 12a and the roller support plate 11c, so that the insertion port 4 having a large diameter can be accommodated. Thus, the rotating frame 12 can be supported in a stable state with respect to the insertion opening 4.
[0026]
Further, when the cross-sectional shape of the insertion hole 4 as a buried pipe is no longer a perfect circle due to earth pressure or traffic load, for example, when the cross-sectional shape is flattened and the cross-sectional shape is slightly elliptical. Also, the coil springs 11e of the support rollers 11 can be appropriately expanded and contracted to respective lengths as needed, and the rotating frame 12 can be maintained in the centered state with respect to the flat insertion opening 4. Therefore, even when the cross-sectional shape of the insertion opening 4 is not a perfect circle, the grinder 14 can be smoothly rotated along the outer periphery of the insertion opening 4.
[0027]
Next, as shown in FIGS. 1 and 2, while operating the grinder 14 and bringing the rotary blade 14 a into contact with the outer periphery of the insertion opening 4, the nut 18 d in the grinder support portion 18 is adjusted, and the screw rod 18 c is turned into a pipe diameter. The screw 18 is gradually screwed inward in the direction, and when the rotary blade 14a reaches a predetermined depth, the adjustment of the nut 18d is stopped. Then, the operator operates the handles 12 e and 12 e to rotate the rotating frame 12 in the circumferential direction at a constant speed, so that the grinder 14 supported by the rotating frame 12 is rotated at a constant speed in the circumferential direction of the insertion opening 4. As a result, the annular groove 7 having a constant depth can be smoothly and easily formed on the outer periphery of the insertion opening 4. At this time, as shown in FIG. 5, a surface convex portion 19 exists in a portion on the outer periphery of the insertion opening 4 where the groove processing is performed, and the rotary blade 14 a of the grinder 14 contacts the surface convex portion 19. In this case, the coil spring 18e disposed between the rotary blade holding portion 18b and the inside of the rectangular portion 12b can be contracted therebetween, so that the rotary blade 14a of the grinder 14 can get over the surface convex portion 19. it can. Thereby, it is possible to prevent an overload from acting on the rotary blade 14a of the grinder 14. Accordingly, it is possible to prevent the rotary blade 14a from being damaged or the like, and to prevent an excessive load from acting on the motor that rotates the rotary blade 14a. Very economical.
[0028]
When the annular groove 7 having a constant depth is formed on the outer periphery of the insertion opening 4 in this manner, the projection ring 8 is fitted into the annular groove 7 formed in the same manner as shown in FIG. An insertion protrusion 6 is formed on the outer periphery of the insertion hole 4.
[0029]
As described above, the rotation frame 12 in the pipe outer peripheral processing device 10 can be freely rotated manually by the operator himself. The device can be configured with a very small number of parts as compared with a device having a complicated structure using a chain with rollers, a driving device, and the like. As a result, the device has a very simple structure and a constant depth around the outer periphery of the insertion port 4. The annular groove 7 can be formed. Moreover, since the structure is very simple, the manufacturing cost of the device can be significantly reduced as compared with the device described in Patent Document 1. Further, since the coil spring 18e is disposed between the rotary blade holding portion 18b and the inside of the rectangular portion 12b, as described above, the rotary blade 14a can be prevented from being damaged, and the rotary blade 14a can be removed. Since an unreasonable load can be prevented from acting on the rotating motor, a failure due to burning of the motor can be prevented, which is very economical. In addition, since the coil spring 11e is disposed between the roller support plate 11c and the inside of the annular portion 12a, as described above, it is possible to easily and surely cope with the difference in the diameter of the insertion port 4 and to perform the flat insertion. The mouth 4 can also be handled. Further, since the commercially available grinder 14 (in some cases, a commercially available circular sawing machine) can be used in the pipe outer peripheral processing apparatus 10, for example, a special processing machine or the like for processing the pipe outer peripheral is not required. It is economical.
[0030]
In the above embodiment, the case where the annular groove 7 is formed on the outer periphery of the pipe is shown, but the insertion opening 4 is cut by adjusting the depth of cut into the outer periphery of the insertion opening 4 more deeply. Can be. Further, in the above-described embodiment, the case where the rotating frame 12 and the guide ring 13 have the divided portion in the circumferential direction is shown, but the present invention is not limited to this. For example, the annular groove 7 is formed on the outer periphery of the already cut pipe. In this case, if the end of the tube is passed through the inside of the rotating frame 12 and the guide ring 13, the rotating frame 12 and the guide ring 13 can be arranged on the outer periphery of the tube, so that they are integrally formed in the circumferential direction. Rotating frame 12 and guide ring 13 can be used. Further, in the above-described embodiment, the case where the coil spring 18e as the buffer member and the coil spring 11e as the elastic body are used is shown. However, even without using the coil spring 18e and the coil spring 11e, the rotating frame 12 Is formed of a thin metal plate, so that the rotary frame 12 itself can be elastically deformed by the action of a leaf spring, so that a desired shock absorbing function and dimensional change absorbing function can be obtained.
[0031]
【The invention's effect】
As described above, according to the present invention, when the rotating frame positioned in the axial direction of the tube by the guide ring is rotated, for example, manually along the outer periphery of the tube, the rotating frame supports the rotating frame. The processed machine can be freely rotated along the outer circumference of the tube together with the rotating frame. Accordingly, it is possible to perform machining along the outer periphery of the pipe with a simple structure having only the rotating frame, the guide ring, and the processing machine attached to the rotating frame. Further, since the processing machine can be freely moved along the outer circumference of the pipe, it is possible to perform machining on the outer circumference of a pipe such as a buried pipe which cannot be freely rotated around an axis. Further, since the rotating frame is positioned with respect to the axial direction of the pipe by the guide ring, the processing machine can be rotated along the circumferential direction of the pipe, that is, without being displaced with respect to the axial direction. .
[0032]
Further, since the shock-absorbing member is arranged between the processing machine and the rotating frame, it is possible to absorb the impact in the pipe diameter direction acting on the processing machine, thereby preventing the processing machine from being overloaded. can do.
[0033]
Furthermore, a plurality of frame supporting portions that support the rotating frame with respect to the tube are provided, and the elastic body is disposed between the rotating frame and the rotating frame, so that a dimensional change between the rotating frame and the outer peripheral surface of the tube is performed. Can be absorbed.
[Brief description of the drawings]
FIG. 1 is a front view of a pipe periphery processing apparatus according to an embodiment of the present invention.
FIG. 2 is a side view of the device shown in FIG.
FIG. 3 is a sectional view of a support roller in the device shown in FIG.
FIG. 4 is a cross-sectional view illustrating a state in which a coil spring of a support roller illustrated in FIG. 3 is contracted.
FIG. 5 is a diagram showing a state where a surface convex portion is provided on the outer periphery of the insertion opening in the device shown in FIG. 1;
FIG. 6 is a sectional view showing an example of a pipe joint structure having a seismic function.
FIG. 7 is a view showing a conventional method of forming an insertion projection.
FIG. 8 is a diagram showing a state in which an opening is buried in the ground.
[Explanation of symbols]
4 Insert 12 Rotating frame 13 Guide ring 14 Grinder

Claims (3)

A rotating frame rotatably arranged along the outer circumference of the pipe; and a rotating shaft mounted on the outer circumference of the pipe and mechanically connected to the rotating frame to rotate the rotating frame during rotation of the rotating frame. A guide ring capable of being positioned with respect to a center direction, and a processing machine supported by the rotating frame and capable of performing machining along a circumferential direction of the pipe when the rotating frame rotates. And an outer peripheral processing device for a pipe. 2. The outer peripheral machining apparatus according to claim 1, wherein a shock-absorbing member disposed between the processing machine and the rotating frame is capable of absorbing an impact in the pipe diameter direction acting on the processing machine. It has a plurality of frame supporting portions that support the rotating frame with respect to the tube, and absorbs a dimensional change between the rotating frame and the outer peripheral surface of the tube by disposing an elastic body between the rotating frame and the rotating frame. 3. The outer peripheral machining apparatus according to claim 1, wherein the peripheral machining apparatus is enabled.

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