JP4943710B2 - Distribution device bushing manufacturing method and distribution device bushing manufacturing apparatus - Google Patents

Description

  The present invention relates to a method for manufacturing a power distribution device bushing used for a power distribution device in which oil or the like is filled, such as a pole transformer, and a power distribution device bushing manufacturing apparatus for manufacturing the power distribution device bushing.

  FIG. 1 to FIG. 3 of Japanese Utility Model Publication No. 7-43871 (Patent Document 1) show a power distribution device bushing having a soot tube and an electric wire connector disposed in the soot tube. The soot tube includes first and second recesses that open to both ends, respectively, and a partition wall portion that partitions the first and second recesses, and the partition wall portion includes first and second partitions. A communication hole communicating with the recess is formed. The electric wire connector has a first connection portion accommodated in the first recess, a second connection portion accommodated in the second recess, and a connecting conductor portion penetrating the communication hole. is doing. And the external electric wire in a power distribution apparatus is electrically connected to the 1st connection part, and the internal electric wire in a power distribution apparatus is electrically connected to the 2nd connection part. In this bushing, an external electric wire is inserted into the first concave portion of the soot tube in a direction orthogonal to the direction in which the wire connector extends from the external wire insertion hole formed in the wall portion of the soot tube. And the core wire of an external electric wire is pinched | interposed between two division tools of a 1st connection part, and the two division tools are tightened using a volt | bolt and the 1st connection part and an external electric wire are aimed at the electrical connection. . Moreover, the opening part of the 1st recessed part is plugged up with the soot tube cap. The shield between the opening of the first recess and the soot tube cap is achieved by joining insulating rings provided on both of them.

  However, in such a conventional power distribution device bushing, in order to improve the liquid-tightness inside the bushing, many parts are required and a troublesome work is required for assembly. Moreover, since the core wire of an external electric wire is only pinched | interposed between the two division tools of a 1st connection part, there exists a limit in raising the connection strength of a 1st connection part and an external electric wire. It is also conceivable to increase the liquid tightness inside the bushing by filling the first recess or the second recess with an epoxy resin or the like. However, when an epoxy resin or the like is filled, a resin filling step and a curing step are required, and a problem that the pipe cannot be reused occurs.

  Therefore, the patent applicant previously proposed a distribution device bushing shown in FIGS. 1 to 3 (Japanese Patent Application No. 2004-347167).

  This power distribution device bushing has the following configuration. FIG. 1 is a longitudinal sectional view of a first embodiment of the power distribution device bushing used in a power distribution device comprising a pole transformer, FIG. 2 is a partially enlarged view of FIG. 1, and FIG. 3 is a longitudinal cross section of an elastic bush. FIG. As shown in the figure, the power distribution device bushing according to this embodiment includes a soot tube 1, an electric wire connector 3 and an elastic bush 5 disposed in the soot tube 1. The soot tube 1 includes a tube body 7 and a cylindrical wall portion 9 provided outside the tube body 7. The cylindrical wall portion 9 includes an annular wall portion 9 a at one end so that an annular groove 11 is formed between the tubular wall portion 9 and the tube body 7. The cylindrical wall portion 9 is integrally coupled to the tube main body 7 through the annular wall portion 9a. In the bushing of this example, the annular wall portion 9a is in contact with the outer wall surface of the case of the pole transformer (distribution device) so that the cylindrical wall portion 9 is positioned outside the distribution device (the annular groove 11 is formed). The tube main body 7 is attached to the power distribution device in a state of penetrating through the through-hole of the outer wall portion of the power distribution device so as to open toward the outside.

  The pipe body 7 has a shape close to a cylindrical shape extending along the center line C1, and a partition wall portion 13 is formed at a position in the longitudinal direction 1/3. The pipe body 7 is partitioned by the partition wall 13 and has a first recess 15 having an opening that opens toward the outside of the distribution device and a second portion having an opening that opens toward the inside of the distribution device. A recess 17 is formed. The partition wall 13 is formed with a communication hole 13 a that communicates the first recess 15 and the second recess 17. In this communication hole 13a, a part of the electric wire connector 3 is disposed in a penetrating manner.

  The wire connector 3 has an elongated rod shape made of brass, and a first connection portion 19 accommodated in the first recess 15 and a second connection accommodated in the second recess 17. And a connecting conductor portion 23 that connects the first connecting portion 19 and the second connecting portion 21 and penetrates the communication hole 13a. The first connecting portion 19 has an engaging portion 25 at the end. The engaging portion 25 has a truncated conical shape, and has a shape in which a cross-sectional area increases from the opening of the first recess 15 toward the partition wall portion 13. In other words, the engaging portion 25 has an annular first engaging surface 25 a that continuously extends along the outer periphery of the connecting conductor portion 23 and extends along the partition wall portion 13. Further, the engaging portion 25 is inclined so as to be away from the center line C1 from the opening of the first recess 15 toward the partition wall portion 13 (having a predetermined angle with the inner surface 1a of the first recess 15). And a second engaging surface 25b made of a truncated conical inclined surface. In addition, an elongated hole portion 19a is formed in the first connecting portion 19 so as to open to the opening portion side of the first recess 15 and extend in the longitudinal direction beyond the portion where the engaging portion 25 is located. Yes. The core wire 27a of the external electric wire 27 in the power distribution device is inserted into the hole 19a. The cylindrical portion of the first connection portion 19 located on the partition wall portion 13 side with respect to the engagement portion 25 is caulked from the radially outer side, and the core wire 27 a is compressed to the first connection portion 19. Thereby, the external electric wire 27 is electrically connected to the first connecting portion 19.

  Inside the second connection portion 21, an elongated hole portion 21 a that opens to the opening portion side of the second recess 17 and extends in the longitudinal direction is formed. The core wire 29a of the internal electric wire 29 in the power distribution device is inserted into the hole 21a. The second connecting portion 21 is caulked from the outside in the radial direction, and the core wire 29 a is compressed to the second connecting portion 21. Thereby, the internal electric wire 29 is electrically connected to the second connecting portion 21.

  The connecting conductor portion 23 is integrally provided with an annular flange portion 31 at a position closer to the partition wall portion 13 than the engaging portion 25. Between the flange part 31 and the partition wall part 13, the annular packing 33 arrange | positioned so that the outer peripheral surface of the connection conductor part 23 may be enclosed is arrange | positioned in the compressed state. Further, a male screw portion 23 a is formed in a portion of the connecting conductor portion 23 located in the second recess 17. A nut 35 is screwed into the male screw portion 23 a, and the electric wire connector 3 is attached to the soot tube 1 such that the partition wall portion 13 is sandwiched between the flange portion 31 and the nut 35. In this example, in order to relieve the local pressure between the nut 35 and the partition wall portion 13 and to increase the coupling force by screwing between the male screw portion 23a and the nut 35, the partition wall portion 13 and the nut 35 Between them, an insulating washer 53, a washer 39 and a spring washer 37 are arranged. Further, an insulating tube 55 made of kraft paper extends around the portion of the electric wire connector 3 and the internal electric wire 29 across the portion of the second concave portion 17 where the electric wire connector 3 is exposed to the outside and a part of the internal electric wire 29. It is arranged to surround.

  The elastic bush 5 is integrally formed from an elastic material such as synthetic rubber and is inserted into the first recess 15. As shown in FIG. 3, the elastic bush 5 before being inserted into the first recess 15 integrally includes a main body 45 and a bulging portion 47. The main body 45 is pointed from the opening of the first recess 15 with the cylindrical portion 45a inserted into the first recess 15 and the elastic bush 5 inserted into the first recess 15. And a protruding truncated cone portion 45b. The main body 45 is formed with a through hole 49 that passes through the central portion of the elastic bush 5. In the through hole 49, a connection portion between the first connection portion 19 of the electric wire connector 3 and the external electric wire 27 is disposed. Thereby, the elastic bush 5 is inserted in the 1st recessed part 15 in the state surrounding the connection part of the 1st connection part 19 of the electric wire connector 3, and the external electric wire 27. As shown in FIG. In the middle of the through hole 49, an enlarged portion 49a into which the engaging portion 25 of the electric wire connector 3 enters is formed. The enlarged portion 49 a has a shape that matches the frustoconical shape of the engaging portion 25. An annular first engaged surface 45c that engages with the first engaging surface 25a of the engaging portion 25 of the electric wire connector 3 is connected to the portion exposed in the enlarged portion 49a of the elastic bush 5 and the electric wire connection. A conical second engaged surface 45d that engages with the second engaging surface 25b of the engaging portion 25 of the tool 3 is formed. The distance L1 between the first engaged surface 45c and the bottom surface 5a of the elastic bush 5 before being inserted into the first recess 15 is equal to the first engaging surface 25a of the wire connector 3 and the flange portion. It is set to be larger than the distance L2 (FIG. 2) between the 31 and the contact surface 31a. For this reason, the first engagement surface 25a of the wire connector 3 and the first of the elastic bush 5 are simply surrounded by the elastic bush 5 in the connection portion between the first connection portion 19 of the wire connector 3 and the external wire 27. The second liquid-tight seal can be formed between the first engaged surface 45 c and the fourth liquid-tight seal between the contact surface 31 a of the flange portion 31 and the bottom surface 5 a of the elastic bush 5. Can be formed.

  As shown in FIG. 3, the bulging portion 47 has a shape surrounding the periphery of the columnar portion 45a, and is formed integrally with the columnar portion 45a. The portion of the bulging portion 47 having the largest diameter dimension has an outer diameter dimension larger than the inner diameter dimension of the first recess 15 before being inserted into the first recess 15. In this example, the elastic bush 5 is inserted into the first recess 15 so that the portion of the bulging portion 47 having the largest diameter dimension is located in the first recess 15. The bulging portion 47 has an outer diameter that increases from the bottom surface 5a of the elastic bushing 5 toward the truncated cone portion 45b and decreases from the middle portion to the surface of the truncated cone portion 45b. Become. Therefore, the bulging portion 47 has a first frustoconical side surface 47a that is inclined away from the center line C1 of the soot tube 1 as it goes from the bottom surface 5a of the elastic bushing 5 to the frustoconical portion 45b, It has the 2nd frustoconical side surface 47b which inclines so that it may approach the centerline C1 of the soot tube 1 from the middle part. As shown in FIG. 2, in this example, the elastic bush 5 has the side surfaces 47 a and 47 b of the bulging portion 47 in contact with the inner surface 1 a exposed in the first recess 15 of the soot tube 1, and the bottom surface 5 a is a wire connector. It is press-fitted into the first recess 15 so as to come into contact with the contact surface 31a of the third flange 31. Then, when the elastic bushing 5 is inserted into the first recess 15 and the material constituting the bulging portion 47 moves toward the cylindrical portion 45a, the elastic bushing 5 is compressed and deformed, as shown in FIG. As shown by the arrow P1, pressure is applied to the inner surface 1a of the tub tube 1 from the side surfaces 47a and 47b of the bulging portion 47, and the side surfaces (a part of the outer surface of the elastic bush 5) 47a and 47b and the inner surface of the first recess 15 A first liquid-tight seal is formed with 1a. Further, as described above, the nut 35 is screwed into the male screw portion 23a of the wire connector 3, and the wire connector 3 moves from the first recess 15 side to the second recess 17 side, As indicated by an arrow P2 in FIG. 2, pressure is applied from the first engaged surface 45c of the elastic bushing 5 to the first engaging surface 25a of the engaging portion 25 of the wire connector 3, so that the first engagement A second liquid tight seal is formed between the mating surface 25a and the first engaged surface 45c. Further, as indicated by an arrow P3, pressure is applied from the second engaged surface 45d of the elastic bushing 5 to the second engaging surface 25b of the engaging portion 25 of the wire connector 3, so that the second engagement is performed. A third liquid-tight seal is formed between the surface 25b and the second engaged surface 45d.

  In the power distribution device bushing of this example, the second liquid-tight seal is formed by both the enclosure of the wire connector 3 by the elastic bush 5 and the compression deformation of the elastic bush 5, so the seal of the second liquid-tight seal Sex is particularly high.

  According to this power distribution device bushing, the wire bushing 3 is moved from the first concave portion 15 side to the second concave portion 17 side, and the elastic bush 5 is press-fitted into the first concave portion 15. The liquid tightness between the elastic bush 5 and the soot tube 1 and the liquid tightness between the electric wire connector 3 and the elastic bush 5 can be enhanced. As a result, the liquid tightness inside the bushing can be easily increased with a small number of parts.

  Moreover, if the 1st connection part 19 and the external electric wire 27 of the electric wire connector 3 are connected beforehand by processes, such as caulking, the connection strength of the 1st connection part 19 and the external electric wire 27 will fully be raised. be able to.

Further, this power distribution device bushing can obtain high liquid tightness without filling the first recess 15 or the second recess 17 with an epoxy resin or the like. , Can recycle the fistula.
No. 7-43871

  However, in the distribution device bushing proposed by the present applicant, one surface of the annular packing 33 passed through the communication conductor portion 23 of the wire connector 3 in the vertical tube 1 is the other side of the flange portion 31 of the wire connector 3. The other surface of the annular packing 33 is in contact with one surface of the partition wall portion 13 in the soot tube 1, and the other conductor side of the partition wall portion 13 is connected to the communication conductor portion 23. Since compression is performed by tightening the nut 35 screwed into the male screw portion 23a, the compressed state of the annular packing 33 is in a predetermined state, and the communication hole 13a of the partition wall portion 13 is sealed by the annular packing 33. There was a problem that it was impossible to determine whether or not it was in a sufficient state, and the reliability of the distribution device bushing remained uneasy.

  An object of the present invention is to provide a method of manufacturing a power distribution device bushing capable of ensuring that the communication hole provided in the partition wall portion in the vertical pipe is sufficiently sealed with an annular packing, and the power distribution device used for carrying out this method It is to provide a bushing manufacturing apparatus.

  Another object of the present invention is to move the pre-treatment assembly under the horizontal frame portion of the frame structure in a vertically oriented state in which a part of the elastic bushing is fitted in the multi-layer tube receiving portion. An object of the present invention is to provide an apparatus for manufacturing a bushing for distribution equipment.

  Another object of the present invention is to provide a power distribution device bushing manufacturing apparatus capable of accurately raising and lowering a soot tube presser portion of a soot tube pressing mechanism using a pitch of a screw.

  The power distribution device bushing to be manufactured in the present invention has the following structure. That is, the power distribution device bushing has a first recess having an opening that opens at one end face and a second recess having an opening that opens at the other end face opposite to the one end face. In addition, a partition wall portion is provided between the first recess and the second recess, and a soot tube in which a communication hole for communicating the first recess and the second recess is formed in the partition wall portion is provided. And connecting the first connection portion accommodated in the first recess, the second connection portion accommodated in the second recess, the first connection portion and the second connection portion; A connecting conductor portion penetrating through the communication hole, a flange portion provided at a boundary portion between the first connecting portion and the connecting conductor portion, and a member provided to bulge to the outer periphery at the end portion of the first connecting portion. It has an electric wire connector which has a joint part and a male screw part provided in the perimeter of a connecting conductor part adjacent to the 2nd connection part. Furthermore, it has an elastic bush formed of an elastic material and press-fitted into the outer periphery of the first connecting portion including the engaging portion. One end of the external electric wire in the power distribution device is electrically connected to the first connection portion. One end of an internal electric wire in the power distribution device is electrically connected to the second connection portion. The elastic bush is press-fitted in a state of surrounding the connection portion between the first connection portion of the wire connector and the external wire. In this state, the elastic bush is in contact with one surface of the flange portion. The annular packing is fitted into the connecting conductor portion with one surface in contact with the other surface of the flange portion. The elastic bush is press-fitted into the first recess of the soot tube. In this state, the other surface of the annular packing is approached or brought into contact with one surface of the partition wall portion of the soot tube. The connecting conductor portion of the electric wire connector and the internal electric wire are led to the second recess through the communication hole provided in the partition wall portion of the soot tube. The nut screwed into the male screw portion on the outer periphery of the connecting conductor portion in the second recess is in contact with the other surface of the partition wall portion via a washer.

  The power distribution device bushing manufacturing apparatus of the present invention is used to manufacture the power distribution device bushing having such a structure. This power distribution device bushing manufacturing apparatus includes a packing compression jig that has a tubular shape and through which an internal electric wire is passed and is screwed into a male screw portion of a connecting conductor portion. Moreover, the nut fastening jig | tool which has a tubular shape, fits on the outer periphery of the packing compression jig, and is fitted around the nut is provided. Moreover, the rotary tool which rotates a nut fastening jig | tool with a predetermined torque is provided. It also has a horizontally installed base. Further, a frame structure is erected on the base. This frame structure includes a horizontal frame portion disposed at a predetermined interval from the base. A soot tube receiving portion is provided on the base. It has a soot tube pressing mechanism provided with a soot tube holding part that pushes down the soot tube received in the soot tube receiving part to the base side. It has a load measuring device that measures the compressive load applied to the packing by the packing compression jig. In the horizontal frame portion, packing compression jig insertion grooves are provided so as to open on the front and upper and lower surfaces of the horizontal frame portion. A fitting recess into which a part of the elastic bush is fitted is formed in the bottom wall portion in the soot tube receiving portion.

  The manufacture of the power distribution device bushing using the power distribution device bushing manufacturing apparatus having such a structure is performed as follows.

  First, in the manufacturing method of the present invention, a pretreatment assembly having the following configuration is manufactured in advance. In this pretreatment assembly, one end of the external electric wire is electrically connected to the first connection portion of the electric wire connector. One end of the internal electric wire is electrically connected to the second connection portion of the electric wire connector. An elastic bushing is press-fitted and abutted against one surface of the flange portion in a state of surrounding the connection portion between the first connection portion of the wire connector and the external wire. An annular packing is fitted into the connecting conductor portion with one surface in contact with the other surface of the flange portion. An annular packing and a flange portion are inserted into the first recess of the soot tube. The connecting conductor portion and the internal electric wire of the wire connector are led to the second recess of the soot tube through the communication hole provided in the partition wall portion of the soot tube. In the second recess of the soot tube, the nut is passed through the inner wire through the washer first.

  The pretreatment assembly having such a structure is prepared in advance so that the second concave portion of the soot tube opens upward.

  The pretreatment assembly is inserted into the soot tube receiving portion so that a part of the elastic bush is fitted in the fitting recess in the soot tube receiving portion, and a nut fastening jig is passed through the internal wire to tighten the nut. Insert the lower part of the jig into the second recess of the soot tube, pass the packing compression jig through the internal wire, and pass the lower part of the packing compression jig through the nut tightening jig to the second recess of the soot pipe Insert and set the packing compression jig vertically so that a part of the upper part of the packing compression jig is fitted in the packing compression jig insertion groove provided in the horizontal frame portion of the frame structure.

  In this state, the soot tube presser mechanism pushes down the soot tube by the soot tube pressing portion, and the soot tube is pushed down to press the elastic bush together with the annular packing into the first recess of the soot tube. After that, the soot tube presser portion of the soot tube pressing mechanism is raised to a predetermined position to stand by.

  Next, the nut tightening jig is turned to screw the nut into the male screw portion of the connecting conductor portion.

  Next, the wire compression tool is raised by rotating the packing compression jig in a state where the position relative to the horizontal frame portion is fixed and screwing the packing compression jig into the male screw portion of the connecting conductor portion. In the process of ascending the wire connector, the soot pipe also rises together. After the soot pipe hits the stand-by soot holding part, the packing compression jig is further turned to raise the wire connector so that the other face of the annular packing is pressed against one face of the partition wall part of the soot pipe. Compress. In this compression process, when the measured value measured by the load measuring instrument reaches a predetermined value, the rotation of the packing compression jig is stopped.

  Next, the soot tube presser mechanism pushes down the soot tube again by the soot tube presser, compresses the annular packing with the partition wall portion of the soot tube, and monitors the compression load of the annular packing by measurement with a load measuring device.

  When either or both of the following are satisfied: the amount of depression of the dredging pipe by the dredging push-down mechanism is reduced by a predetermined amount or the compression load of the annular packing reaches the specified value; The tightening jig is rotated again with the rotary tool to tighten the nut with a predetermined torque.

  After that, raise the soot tube presser and remove the completed distribution device bushing.

  In such a manufacturing method for a power distribution device bushing, the packing compression jig supported on the horizontal frame part of the frame structure is turned to raise the wire connector together with the soot pipe, so that the soot pipe hits the stand-by sewer pipe holding part. After that, the packing compression jig is further turned to raise the electric wire connector and the soot tube, thereby pressing the other surface of the annular packing against one surface of the partition wall portion of the soot tube and compressing the annular packing. Then, the compression force is measured by the load measuring device, and the rotation of the packing compression jig is stopped when the measured value reaches a predetermined value. Next, when the soot tube pressing mechanism is operated, the soot tube is pressed down again by the soot tube holding part, the annular packing is compressed at the partition wall of the soot tube, and the compression load of the annular packing is monitored by measurement with a load measuring instrument. The operation of the soot push-down mechanism is stopped when either or both of the pressing down amount of the soot pipe by the lowering mechanism is reduced by a predetermined amount or the compression load of the annular packing reaches the specified value is satisfied. For this reason, the sealing by the annular packing with respect to the communicating hole provided in the partition wall part in the soot tube can be sufficiently performed by actually measuring the sealing state with the load measuring device. Thereafter, the nut tightening jig is rotated again with the rotary tool and the nut is tightened with a predetermined torque. Therefore, the sealing state by the annular packing with respect to the communication hole is fixed, and the sealing performance can be guaranteed.

  Further, in the power distribution device bushing manufacturing apparatus according to the present invention, a tubular packing compression jig, a tubular nut fastening jig, a rotary tool for rotating the nut fastening jig, a base, and a stand are provided on the base. In addition to the packing by the packing structure by the frame structure, the soot tube receiving part provided on the base, the soot pipe pressing mechanism having the soot pipe holding part that pushes down the soot pipe received by this soot pipe receiving part to the base side, and the packing compression jig With a load measuring device that measures the compression load that is provided, a packing compression jig insertion groove is provided in the horizontal frame portion, and a part of the elastic bush is fitted to the bottom wall portion in the vertical tube receiving portion Since it has a structure in which a recess is formed, it is possible to easily perform actual measurement of the sealed state in the vertical tube and fixation of the sealed state.

  In addition, if the guide tube receiving part is fixed on the moving base, and the guide rail is placed on the base to move the moving base and put the pipe receiving part at a predetermined position below the horizontal frame part, the pre-treatment assembly With the elastic bush partly fitted in the soot tube receiving portion, the soot tube receiving portion can be moved under the horizontal frame portion of the frame structure, so that the workability is improved and the manufacturing operation is efficient. It can be performed.

  Further, the soot tube pressing mechanism includes a nut portion fixed to the soot tube holding portion, a ball screw threadedly engaged with the nut portion so as to be rotatable on the base, and a ball screw rotating means for rotating the ball screw forward and backward. With this configuration, it is possible to accurately raise and lower the soot tube presser portion of the soot tube pressing mechanism using the pitch of the screws.

  In the manufacturing method of the power distribution device bushing according to the present invention, the packing compression jig supported on the horizontal frame part of the frame structure is turned to raise the electric wire connector together with the soot pipe, and the soot pipe becomes the stand-by pipe support part. After hitting, the packing compression jig is further turned to raise the electric wire connector and the soot tube, so that the other surface of the annular packing is pressed against one surface of the partition wall portion of the soot tube to compress the annular packing. The process is measured with a load measuring instrument, and when the measured value reaches a predetermined value, the rotation of the packing compression jig is stopped, and then the tub tube presser part is pushed down by the tub tube presser mechanism. The annular packing is compressed at the partition wall portion of the soot pipe, the compression load of the annular packing is monitored, and the push down amount of the soot pipe by the soot push-down mechanism is reduced by a predetermined amount or the compression load of the annular packing is regulated. When either or both of these values are satisfied, the operation of the soot push-down mechanism is stopped, so the seal with the annular packing for the communication hole provided in the partition wall in the soot pipe is loaded with the seal state. This can be done by actually measuring with a measuring instrument. Thereafter, the nut tightening jig is rotated with a rotary tool and the nut is tightened with a predetermined torque. Therefore, the sealing state by the annular packing with respect to the communication hole is fixed, and the sealing performance can be guaranteed.

  Further, in the power distribution device bushing manufacturing apparatus according to the present invention, a tubular packing compression jig, a tubular nut fastening jig, a rotary tool for rotating the nut fastening jig, a base, and a stand are provided on the base. In addition to the packing by the packing structure by the frame structure, the soot tube receiving part provided on the base, the soot pipe pressing mechanism having the soot pipe holding part that pushes down the soot pipe received by this soot pipe receiving part to the base side, and the packing compression jig With a load measuring device that measures the compression load that is provided, a packing compression jig insertion groove is provided in the horizontal frame portion, and a part of the elastic bush is fitted to the bottom wall portion in the vertical tube receiving portion Since it has a structure in which a recess is formed, it is possible to easily perform actual measurement of the sealed state in the vertical tube and fixation of the sealed state.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of a method for manufacturing a power distribution device bushing and a power distribution device bushing manufacturing apparatus according to the present invention will be described in detail with reference to the drawings.

  The distribution device bushing to be manufactured according to the present invention has the structure previously proposed by the present applicant and shown in FIGS.

  In the method for manufacturing a power distribution device bushing according to the present invention, a pretreatment assembly 51 having the following configuration is manufactured in advance. The assembly process of the pretreatment assembly 51 will be described with reference to FIGS.

  As shown in FIG. 4A, the insulating coating 27b is peeled off at the end of the external electric wire 27 to expose the core wire 27a with a predetermined length. In this state, the elastic bush 5 is press-fitted from the core wire 27a side. As shown in FIG. 4B, the press-fitting is performed until the external electric wire 27 penetrating the elastic bushing 5 exposes the core wire 27a and the insulating coating 27b at the tip at a predetermined length.

  Next, as shown in FIG. 4 (C), one end of the external electric wire 27 is fitted to the exposed core wire 27a in the first connecting portion 19 of the electric wire connector 3, and the arrow portion of the fitting portion is compressed. Connect and connect electrically. An annular packing 33 is fitted into the connecting conductor portion 23 of the wire connector 3.

  Next, as shown in FIG. 4 (D), one end of the internal electric wire 29 is fitted into the second connection portion 21 of the electric wire connector 3, and the arrow portion of the fitting portion is compressed and electrically connected. . Next, the elastic bush 5 is press-fitted and brought into contact with one surface of the flange portion 31 in a state in which the connection portion between the first connection portion 19 and the external electric wire 27 of the wire connector 3 is surrounded. One surface of the annular packing 33 is brought into contact with the other surface of the flange portion 31. In addition, even if the operation | work which connects the internal electric wire 29 to the 2nd connection part 21 of the wire connector 3 and the operation | work which press-fits the elastic bush 5 further and abuts on one surface of the flange part 31 are reverse, Good.

  Finally, as shown in FIG. 4E, the annular packing 33 and the flange portion 31 are inserted into the first recess 15 of the soot tube 1, and the connecting conductor portion 23 and the internal wire 29 of the wire connector 3 are connected to the soot tube 1 as shown in FIG. It is made to lead out to the 2nd recessed part 17 of the soot pipe 1 through the communicating hole 13a of the partition wall part 13 of this. The insulating wire 53, the washer 39 and the spring washer 37 are first passed through the internal wire 29 in the second recess 17 of the soot tube 1, and then the nut 35 is passed. Further, the insulating tube 55 is passed through the internal electric wire 29.

  The required number of pretreatment assemblies 51 having such a structure are prepared, and the lower surface of the elastic bush 5 is placed on a frame or the like so that the elastic bush 5 is below and the vertical tube 1 is upward, and is supported in the vertical direction.

  Next, the configuration of the power distribution device bushing manufacturing apparatus used in this example will be described with reference to FIGS. 5 (A), (B), and (C). 5A is a front view of the power distribution device bushing manufacturing apparatus of this example, FIG. 5B is a side view of the power distribution device bushing manufacturing apparatus of this example, and FIG. 5C is a power distribution device bushing manufacturing apparatus of this example. It is an enlarged vertical sectional view which shows the principal part structure.

  This power distribution device bushing manufacturing apparatus has a tubular shape, a packing compression jig 57 through which an internal electric wire 29 is passed and screwed into the male screw portion 23a of the connecting conductor portion 23 of the electric wire connector 3, and a tubular shape. And a nut tightening jig 59 that fits around the outer periphery of the packing compression jig 57 and is fitted to the nut 35 to prevent rotation. The tubular packing compression jig 57 is made of metal, and is formed with a female screw portion 57a screwed to the male screw portion 23a of the connecting conductor portion 23 on the inner periphery of the lower end, and is knurled on the outer periphery of the upper end. Alternatively, a hexagonal operation portion 57b is formed. The nut tightening jig 59 is made of metal, and a nut hole portion 59a that fits into the nut 35 is formed on the inner periphery of the lower end, and a hexagonal operation portion 59b is formed on the outer periphery of the upper end. The inner diameter of the nut tightening jig 59 is thicker than the outer diameter of the portion below the operation portion 57b of the packing compression jig 57, and the portion below the operation portion 57b of the packing compression jig 57 is the nut tightening treatment. It fits in the tool 59 so that it can rotate freely. Further, the nut fastening jig 59 has a thickness that fits rotatably in the second recess 17 of the soot tube 1. Although not shown in the figure, a rotary tool for rotating the hexagonal operation portion 59b of the nut fastening jig 59 with a predetermined torque is provided.

  Moreover, the metal base | substrate 61 installed horizontally is provided. Further, a frame structure 63 is erected on the base 61. The frame structure 63 has a gate shape and is provided with a horizontal frame portion 63a disposed at a predetermined interval from the base 61. A packing compression jig insertion groove 65 is provided in the horizontal frame portion 63a so as to open on the front and upper and lower surfaces of the horizontal frame portion 63a. On the base 61, a soot tube receiving portion 67 is provided. In the soot tube receiving portion 67, there is provided a soot tube fitting portion 67a that opens to the upper surface thereof and into which the lower portion of the soot tube 1 is fitted. A fitting recess 67b is formed in the bottom wall portion of the soot tube receiving portion 67 so as to communicate with the lower part of the central portion of the soot tube fitting portion 67a opened upward. A lower portion of the elastic bush 5 of the pretreatment assembly 51 is fitted into the fitting recess 67b.

  In this example, the soot tube receiving portion 67 is fixed on the moving table 69. A pair of guide rails 71 is installed on the base 61 to move the moving table 69 and place the soot tube receiving portion 67 at a predetermined position below the horizontal frame portion 63a. The soot tube receiving portion 67 is positioned below the packing compression jig insertion groove 65 of the horizontal frame portion 63a. A plurality of sliders 73 are fixed to the lower surface of the moving table 69 and are fixed to the moving table 69 and slide on the upper portions of the guide rails 71.

  At the time of assembly, the pretreatment assembly 51 inserts the soot tube 1 into the soot tube receiving portion 67 so that a part of the elastic bush 5 is fitted into the fitting recess 67b in the soot tube receiving portion 67, and a nut tightening jig 59 is passed through the internal electric wire 29 and the lower part of the nut fastening jig 59 is inserted into the second recess 17 of the soot tube 1, and the packing compression jig 57 is passed through the internal electric wire 29 and the lower part of the packing compression jig 57 is It passes through the nut fastening jig 59 and is inserted into the second concave portion 17 of the soot tube 1 so that the load of the pretreatment assembly 51 is supported by the soot tube receiving portion 67 and waits vertically.

  In addition, the power distribution device bushing manufacturing apparatus includes the soot tube pressing mechanism 77 provided with the soot tube holding portion 75 that pushes down the soot tube 1 received by the soot tube receiving portion 67 toward the base 61 as described above. A pair of soot tube presser portions 75 are provided so as to be placed on the upward stepped portion 1b of the outer periphery of the soot tube 1. The soot tube pressing mechanism 77 of this example includes a nut portion (not shown) fixed to the soot tube holding portion 75, a ball screw 79 screwed to the nut portion and erected on the base 61, and the ball screw 79. And a ball screw rotating means (not shown) for rotating the lens forward and backward. The ball screw rotating means is incorporated in a frame portion 81 erected on the base 61. The soot tube holding portion 75 is vertically formed by a pair of guide rails 83 supported vertically on the front surface of the frame portion 81 and a pair of sliders 85 supported by the soot tube holding portions 75 and sliding on the guide rails 83. Guided to move up and down.

  Furthermore, the power distribution device bushing manufacturing apparatus includes a load measuring device 87 that measures a compressive load applied to the packing 33 by the rotation of the packing compression jig 57. The load measuring device 87 is installed on the horizontal frame portion 63 a of the frame structure 63 so as to correspond to the packing compression jig insertion groove 65. The load measuring device 87 rotates the operation portion 57b in a state where the female screw portion 57a of the packing compression jig 57 is screwed into the male screw portion 23a of the connecting conductor portion 23 of the electric wire connector 3, thereby connecting the electric wire connector 3 to the load measuring device 87. The compression load when the annular packing 33 is compressed between the partition wall 13 of the vertical tube 1 by the rising of the flange portion 31 is measured by pressing from the operation portion 57b of the packing compression jig 57. ing.

  Next, a method for manufacturing the power distribution device bushing of this example using such a power distribution device bushing manufacturing apparatus will be described with reference to FIGS. 6 (A), (B) to FIGS. 14 (A), (B).

  In these drawings, in which both (A) and (B) exist, (A) is a perspective view of the apparatus in which the pretreatment assembly 51 is set, and (B) is a pretreatment assembly in this apparatus. It is a longitudinal cross-sectional view which shows the relationship between 51 and the soot tube receiving part 67. FIG. In addition, although the external electric wire 27 and the internal electric wire 29 are connected to the electric wire connector 3 as mentioned above, it is abbreviate | omitting in these figures.

  First, as shown in FIGS. 6 (A) and 6 (B), a nut fastening jig 59 is previously placed on the internal wire 29 in the second recess 17 of the vertical tube 1 of the pretreatment assembly 51, and the nut hole 59a is directed downward. Next, the packing compression jig 57 is fitted to the internal electric wire 29 with the female screw portion 57 a facing downward, and inserted into the nut fastening jig 59.

  In this state, the operator fits the pretreatment assembly 51 into the elastic bush 5 and the lower portion of the vertical tube 1 into the vertical tube fitting portion 67a in the vertical tube receiving portion 67 on the moving table 69, and the nut fastening jig 59 is installed inside. The lower part of the nut fastening jig 59 is inserted into the second recess 17 of the soot tube 1 through the electric wire 29, and the packing compression jig 57 is passed through the inner electric wire 29 to fix the lower part of the packing compression jig 57 with the nut. It passes through the tool 59 and is inserted into the second recess 17 of the soot tube 1 so that the load of the pretreatment assembly 51 is supported by the soot tube receiving portion 67 and waits in the vertical direction.

  In order to facilitate the mounting operation of the pretreatment assembly 51, slits 89 and 91 are provided in the movable table 69 and the soot tube receiving portion 67 in the vertical direction.

  The operation of attaching the pretreatment assembly 51 to the soot tube receiving portion 67 is performed by placing the moving table 69 in front of the frame structure 63.

  Next, as shown in FIGS. 7A and 7B, an operator or the like pushes and moves the movable table 69 toward the frame structure 63, and the packing compression jig 57 hits the horizontal frame portion 63 a of the frame structure 63. In this state, the movement of the movable table 69 is stopped, and an operator or the like gradually moves the movable table 69 while fitting the packing compression jig 57 into the packing compression jig insertion groove 65 by the operator's hand. When the packing compression jig 57 is fitted in the packing compression jig insertion groove 65, the movement of the movable table 69 is stopped. In this state, the movable base 69 is preferably fixed to the base 61 with a locking means (not shown).

  In this state, the operation portion 57 b of the packing compression jig 57 is positioned on the load measuring device 87.

  Next, as shown in FIGS. 8A and 8B, the next process operation section 93 provided on the front side on the base 61 is operated to activate the soot push-down mechanism 77 so that the soot-pipe presser 75 is moved. Lower. As a result, the pair of soot tube holding portions 75 hits the upward stepped portion 1b of the outer periphery of the soot tube 1 so that the soot tube 1 is pushed down. Thereby, the lower part of the elastic bush 5 is press-fitted into the fitting recess 67 b of the soot tube receiving part 67.

  Next, as shown in FIG. 9, the soot tube pressing mechanism 77 is reversely operated to raise the soot tube holding portion 75 to a predetermined position. In this state, there is a gap 95 between the annular packing 33 and the partition wall 13 of the soot tube 1.

  Next, as shown in FIGS. 10A and 10B, the nut hole portion 59a of the nut tightening jig 59 is fitted into the nut 35, the operation portion 59b is turned by the operator's hand, and the nut 35 is connected to the connecting conductor portion. 23 is screwed into the male screw portion 23a. The operation portion 59b is further rotated, and the nut 35 is tightened to some extent.

  Thereafter, the operation portion 57 b of the packing compression jig 57 is turned, and the female screw portion 57 a is screwed into the male screw portion 23 a of the connecting conductor portion 23. In this state, if the operation portion 57b of the packing compression jig 57 is continuously rotated, the female screw portion 57a of the packing compression jig 57 is lowered while being screwed into the male screw portion 23a of the connecting conductor portion 23, and FIG. ), The operating portion 57b hits the load measuring device 87. If the operation portion 57b is further rotated from this state, the packing compression jig 57 stops descending, and the electric wire connector 3 is now raised. When the wire connector 3 rises, the flange portion 31 abuts against the partition wall 13 of the soot tube 1 via the annular packing 33, so that the soot tube 1 also rises. When the soot tube 1 is raised, the step portion 1b of this soot tube 1 comes into contact with the pair of standing soot holders 75 that are waiting, and the raising of the soot tube 1 is stopped. When the operation portion 57b is further rotated, the flange portion 31 rises due to the rise of the wire connector 3, and the annular packing 33 strikes the partition wall 13 of the soot tube 1 and is compressed. The compression state of the annular packing 33 is measured by a load measuring device 87, and the measured value is monitored by a monitor 97 standing on the base 61.

  Next, as shown in FIGS. 11A and 11B, the packing compression jig 57 is manually rotated to a specified value while monitoring the load on the monitor 97 of the load measuring device 87.

  When the load reaches the specified value, the next process operation unit 93 is operated, the operation of the vertical tube pressing mechanism 77 is performed to lower the vertical tube pressing portion 75, and the vertical tube 1 is pressed down again to compress the annular packing 33. That is, the soot tube 1 is lowered by the descending of the soot tube holding portion 75 at this time, but the wire connector 3 is fixed to the horizontal frame portion 63a of the frame structure 63 by the packing compression jig 57. The annular packing 33 between the wall 13 and the flange portion 31 of the wire connector 3 is compressed. The compressive load of the annular packing 33 is monitored by the monitor 97 of the load measuring device 87.

  Next, as shown in FIGS. 12 (A) and 12 (B), either the pressing amount of the soot tube 1 by the soot tube pressing mechanism 77 is lowered by a predetermined amount, or the compression load of the annular packing 33 reaches a specified value, or When both are satisfied, the operation of the soot push-down mechanism 77 is stopped, and then the operation portion 59b of the nut tightening jig 59 is manually turned using, for example, a rotary tool 99 made of a torque wrench, so that the nut 35 has a predetermined torque. Tighten with. Thereby, the distribution device bushing 101 is completed.

  Next, as shown in FIGS. 13A and 13B, after the nut 35 is completely tightened, the next process operation unit 93 is operated to raise the soot tube presser unit 75.

  Finally, as shown in FIGS. 14A and 14B, the operator pulls the moving table 69 toward the front, and brings the distribution device bushing 101 together with the soot tube receiving portion 67 to the front of the frame structure 63. In this state, the power distribution device bushing 101 is removed from the soot tube receiving portion 67. This completes the work.

It is a longitudinal cross-sectional view of the power distribution equipment bushing manufactured by this invention. It is the elements on larger scale of FIG. It is a longitudinal cross-sectional view of an elastic bush. (A) thru | or (E) is process drawing which shows the assembly process of the pre-manufacture processing assembly by this invention. (A) thru | or (C) are the front view of the power distribution equipment bushing manufacturing apparatus which concerns on this invention, a side view, and the expanded longitudinal cross-sectional view which shows the principal part structure of this power distribution equipment bushing manufacturing apparatus. (A) is the manufacturing method of the distribution equipment bushing which concerns on this invention, and is a perspective view of the process which set the pre-processing assembly to the soot pipe receiving part, (B) is the relationship between the pre-processing assembly and the soot pipe receiving part in this process FIG. (A) is the manufacturing method of the distribution equipment bushing which concerns on this invention, and is the perspective view of the process which moved the thing which set the pre-processing assembly to the tub tube receiving part to the frame structure, (B) is the pre-processing in this process It is a longitudinal cross-sectional view which shows the relationship between an assembly and a soot tube receiving part. (A) is the manufacturing method of the distribution equipment bushing which concerns on this invention, and is a perspective view of the process which pushed down the soot pipe holding part, (B) is a longitudinal cross-sectional view which shows the relationship between the pre-processing assembly in this process and a soot pipe receiving part It is. It is a longitudinal cross-sectional view which shows the relationship between the pre-processing assembly and the soot tube receiving part of the process which raised the soot pipe presser part by the manufacturing method of the power distribution apparatus bushing which concerns on this invention. (A) is the manufacturing method of the distribution equipment bushing which concerns on this invention, and is a perspective view of the process of turning a packing compression jig | tool, (B) is a longitudinal cross-sectional view which shows the relationship between the pre-processing assembly in this process and a soot tube receiving part It is. (A) is the manufacturing method of the distribution equipment bushing which concerns on this invention, and is a perspective view of the process which pushed down the soot pipe holding part, (B) is a longitudinal cross-sectional view which shows the relationship between the pre-processing assembly in this process and a soot pipe receiving part It is. (A) is the manufacturing method of the distribution equipment bushing which concerns on this invention, and is a perspective view of the process of turning a nut fastening jig | tool, (B) is a longitudinal cross-sectional view which shows the relationship between the pre-processing assembly in this process and a soot tube receiving part It is. (A) is the manufacturing method of the distribution equipment bushing which concerns on this invention, and is a perspective view of the process which raised the soot pipe holding part, (B) is a longitudinal cross-sectional view which shows the relationship between the pre-processing assembly in this process and a soot pipe receiving part It is. (A) is the manufacturing method of the distribution device bushing which concerns on this invention, and is a perspective view of the process of pulling out the completed distribution device bushing from a frame structure, (B) shows the relationship between the obtained distribution device bushing and a soot tube receiving part. It is a longitudinal cross-sectional view.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Steel pipe 3 Electric wire connector 5 Elastic bush 7 Steel pipe main body 13 Partition wall part 13a Communication hole 15 1st recessed part 17 2nd recessed part 19 1st connection part 21 2nd connection part 23 Connection conductor part 23a Male screw part 25 Engagement portion 25a First engagement surface 25b Second engagement surface 27 External wire 29 Internal wire 31 Flange portion 33 Annular packing 35 Nut 37 Spring washer 39 Washer 47 Swelling portion 49 Through hole 49a Enlarged portion 45c First portion Engaged surface 45d Second engaged surface 51 Pretreatment assembly 57 Packing compression jig 57a Female screw part 57b Operation part 59 Nut tightening jig 59a Nut hole part 59b Operation part 61 Base 63 Frame structure 63a Horizontal frame Part 65 Packing compression jig insertion groove 67 Steel pipe receiving part 69 Moving table 71 Guide rail 73 Slider 75 Steel pipe holding part 77 Steel pipe pressing mechanism 79 Ball screw 81 Frame part 83 Guide rail 85 Slider 87 Load measuring device 97 Monitor 99 Rotary tool 101 Power distribution device bushing

Claims (4)

A first recess having an opening opening in one end surface and a second recess having an opening opening in the other end surface located on the opposite side of the one end surface; And a second pipe having a partition wall formed between the first recess and the second recess, wherein the partition wall is formed with a communication hole that connects the first recess and the second recess;
The first connection portion accommodated in the first recess, the second connection portion accommodated in the second recess, and the first connection portion and the second connection portion are coupled to each other. And a connecting conductor portion penetrating the communication hole, a flange portion provided at a boundary portion between the first connecting portion and the connecting conductor portion, and an end portion of the first connecting portion bulges to the outer periphery. An electric wire connector having an engagement portion provided and a male screw portion provided on an outer periphery of the connection conductor portion adjacent to the second connection portion;
An elastic bush formed of an elastic material and press-fitted into the outer periphery of the first connection portion including the engagement portion;
One end of the external wire in the power distribution device is electrically connected to the first connection portion, and one end of the internal wire in the power distribution device is electrically connected to the second connection portion,
The elastic bushing is press-fitted in a state of surrounding the connection portion between the first connection portion of the wire connector and the external wire, and is brought into contact with one surface of the flange portion;
One surface is brought into contact with the other surface of the flange portion, and an annular packing is fitted into the connecting conductor portion,
The elastic bushing is press-fitted into the first recess of the soot tube, and the other surface of the annular packing approaches or comes into contact with one surface of the partition wall portion of the soot tube,
The connecting conductor portion of the wire connector and the internal electric wire are led to the second recess through the communication hole provided in the partition wall portion of the vertical pipe,
Production of a power distribution device bushing having a structure in which a nut screwed into the male screw portion on the outer periphery of the connecting conductor portion in the second recess is in contact with the other surface of the partition wall portion via a washer A method,
Using a power distribution device bushing manufacturing apparatus for manufacturing the power distribution device bushing,
The power distribution device bushing manufacturing apparatus includes a packing compression jig that has a tubular shape and through which the internal electric wire is passed and is screwed into the male screw portion of the connecting conductor portion, and a tubular compression jig that has a tubular shape. A nut tightening jig that fits on the outer periphery of the nut and is fixed to the nut, a rotating tool that rotates the nut tightening jig with a predetermined torque, a horizontally installed base, and a stand on the base And a frame structure provided so as to dispose a horizontal frame portion at a predetermined interval from the base, a soot tube receiving portion provided on the base, and received by the soot tube receiving portion A vertical tube pressing mechanism having a vertical tube pressing part for pressing down the vertical tube toward the base, and a load measuring device for measuring a compressive load applied to the packing by the packing compression jig; A packing compression jig insertion groove is provided so as to open on the front and upper and lower surfaces of the horizontal frame part, and a part of the elastic bush is fitted to the bottom wall part in the soot tube receiving part. A recess is formed and configured.
One end of the external electric wire is electrically connected to the first connection portion of the electric wire connector, one end of the internal electric wire is electrically connected to the second connection portion, and the first of the electric wire connector The elastic bushing is press-fitted in a state of surrounding a connection portion between one connection portion and the external electric wire and is brought into contact with one surface of the flange portion, and one surface is brought into contact with the other surface of the flange portion In this state, an annular packing is fitted into the connecting conductor portion, the annular packing and the flange portion are inserted into the first recess of the soot tube, and the connecting conductor portion and the internal electric wire of the wire connector are connected to each other. Passed through the communication hole provided in the partition wall portion of the soot tube and led out to the second recess, and previously passed the washer through the internal wire in the second recess of the soot tube and Pre-treatment assembly with a structure through which a nut is passed Leave previously prepared in a posture that is open towards the top the second recess of the porcelain bushing,
The pretreatment assembly is inserted into the soot tube receiving portion so that the part of the elastic bushing is fitted into the fitting recess in the soot tube receiving portion, and the nut fastening jig is Insert the lower part of the nut tightening jig into the second recess of the soot tube through the internal electric wire, pass the packing compression jig through the internal electric wire and connect the lower part of the packing compression jig to the nut tightening jig Is inserted into the second recess of the soot tube, and a part of the upper portion of the packing compression jig is fitted into the packing compression jig insertion groove provided in the horizontal frame portion of the frame structure. Set it vertically and
In such a state, the elastic tube is pressed into the first recess of the vertical tube together with the annular packing by pressing down the vertical tube by the vertical tube pressing portion by operating the vertical tube pressing mechanism, and pressing down the vertical tube. After that, the soot tube presser mechanism of the soot tube pressing mechanism is raised to a predetermined position to stand by,
Next, the nut tightening jig is turned to screw the nut into the male screw portion of the connecting conductor portion,
The packing compression jig is turned in a state where the position relative to the horizontal frame portion is fixed, and is screwed into the male screw portion of the connecting conductor portion to raise the wire connector, and the rod pipe is on standby Then, the other side of the annular packing is pressed against one surface of the partition wall portion of the soot tube by rotating the packing compression jig to raise the wire connector. The annular packing is compressed, and the rotation of the packing compression jig is stopped when the measured value measured by the load measuring instrument reaches a predetermined value.
Next, the soot tube presser mechanism pushes down the soot tube again with the soot tube presser mechanism, compresses the annular packing with the partition wall portion of the soot tube, and compresses the annular packing with the load measuring instrument. Monitored by measurement,
The operation of the soot tube pressing mechanism is stopped when either one or both of the above-mentioned soot tube pressing mechanism has lowered the pressing amount of the soot tube by a predetermined amount or the compression load of the annular packing reaches a specified value. And
Thereafter, the nut tightening jig is rotated again with the rotary tool to tighten the nut with the predetermined torque,
Then, the said distribution pipe bushing which removes the said distribution apparatus bushing completed by raising the said soot pipe presser part is manufactured. A first recess having an opening opening in one end surface and a second recess having an opening opening in the other end surface located on the opposite side of the one end surface; And a second pipe having a partition wall formed between the first recess and the second recess, wherein the partition wall is formed with a communication hole that connects the first recess and the second recess;
The first connection portion accommodated in the first recess, the second connection portion accommodated in the second recess, and the first connection portion and the second connection portion are coupled to each other. And a connecting conductor portion penetrating the communication hole, a flange portion provided at a boundary portion between the first connecting portion and the connecting conductor portion, and an end portion of the first connecting portion bulges to the outer periphery. An electric wire connector having an engagement portion provided and a male screw portion provided on an outer periphery of the connection conductor portion adjacent to the second connection portion;
An elastic bush formed of an elastic material and press-fitted into the outer periphery of the first connection portion including the engagement portion;
One end of the external wire in the power distribution device is electrically connected to the first connection portion, and one end of the internal wire in the power distribution device is electrically connected to the second connection portion,
The elastic bushing is press-fitted in a state of surrounding the connection portion between the first connection portion of the wire connector and the external wire, and is brought into contact with one surface of the flange portion;
One surface is brought into contact with the other surface of the flange portion, and an annular packing is fitted into the connecting conductor portion,
The elastic bushing is press-fitted into the first recess of the soot tube, and the other surface of the annular packing is brought into contact with one surface of the partition wall portion of the soot tube,
The connecting conductor portion of the wire connector is led to the second recess through the communication hole provided in the partition wall portion of the soot tube,
A power distribution device bushing having a structure in which a nut screwed into the male screw portion on the outer periphery of the connecting conductor portion in the second recess is in contact with the other surface of the partition wall portion through a washer is manufactured. A power distribution equipment bushing manufacturing device,
A packing compression jig that has a tubular shape and is threaded into the male screw portion of the connecting conductor portion through which the internal electric wire is passed, and a tubular compression jig that fits on the outer periphery of the packing compression jig and is attached to the nut A nut tightening jig that is fitted with a detent, a rotary tool that rotates the nut tightening jig with a predetermined torque, a horizontally installed base, and a base that is erected on the base and between the base A frame structure provided to arrange the horizontal frame portion at a predetermined interval;
In addition to the packing by the pipe tube receiving part provided on the base, the pipe pipe pressing mechanism provided with the pipe pipe holding part for pressing the pipe pipe received by the pipe pipe receiving part to the base side, and the packing compression jig A load measuring device for measuring a compression load to be formed, and a packing compression jig insertion groove is provided in the horizontal frame portion so as to open on a front surface and an upper and lower surface of the horizontal frame portion, Has a structure in which a fitting recess into which a part of the elastic bushing is fitted is formed on the bottom wall portion thereof.   The soot tube receiving portion is fixed on a moving table, and a guide rail is provided on the base for moving the moving table and placing the soot tube receiving portion at a predetermined position below the horizontal frame portion. The power distribution apparatus bushing manufacturing apparatus of Claim 2 characterized by these.   The soot tube pressing mechanism includes a nut portion fixed to the soot tube presser portion, a ball screw threadedly engaged with the nut portion and erected freely on the base, and a ball screw rotating means for rotating the ball screw forward and backward. The power distribution device bushing manufacturing apparatus according to claim 2, comprising:

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