JP5429975B2 - High-frequency feed line and method for manufacturing high-frequency feed line - Google Patents

Description

  The present invention relates to a high-frequency power supply line for supplying a high-frequency current and a method for manufacturing a high-frequency power supply line.

  2. Description of the Related Art Conventionally, there is a trolley system that includes a moving body such as a traveling hoist or a carriage and a power supply device that supplies electric power to the moving body. The power supply device is configured to transfer power between a power supply line routed along a rail on which the mobile body travels and an electron receiver provided on the mobile body, and the power received by the power receiver is transferred to the mobile body. To supply. As the feeder line, for example, the one described in Patent Document 1 is used.

  FIG. 9 is a perspective view showing the appearance of the high-frequency power supply line described in Patent Document 1, and FIG. 10 is a vertical cross-sectional view of an example using another conductor by copper extrusion of the high-frequency power supply line in FIG. is there. As shown in FIGS. 9 and 10, the high-frequency power supply line 100 includes an inner cylinder part 200 a and a concentric outer cylinder part integrally connected to the inner cylinder part 200 a over the entire length in the longitudinal direction by a connecting part 200 c. A conductor portion using a double cylindrical conductor 200 made of 200b as a conductor portion is embedded in an insulator 300, and the insulator 300 is disposed in the space portions 400a and 400b of the tube portions 200a and 200b. It is set not to be configured.

  In FIG. 9, the conductor 200 is formed by bending, for example, one copper plate material. In other words, the inner portion 200a is formed by bending the center portion of the plate material into an annular cross section, and the two pieces extended downward in the drawing so as to be closely parallel from both ends of the annular portion forming the inner cylinder portion 200a. An outer cylinder part 200b having an annular cross section concentric with the inner cylinder part 200a is formed by bending the arcuate shape so as to surround the inner cylinder part 200a from a predetermined position of the plate piece part, butting both ends thereof and welding the abutting part. Is forming. And the above-mentioned two plate piece parts which are closely parallel to each other constitute a connecting part 200c for connecting both cylinder parts 200a, 200b.

JP 2008-117746 A

However, the high-frequency power supply line disclosed in Patent Document 1 described above has the following problems.
(1) Since there is only one connecting part that connects the inner cylinder part and the outer cylinder part, the positioning of the inner cylinder part is unstable and the AC resistance tends to increase. Incidentally, the high-frequency resistance has the lowest value when the inner tube portion and the outer tube portion are concentric.
(2) In order to form the inner tube portion, the outer tube portion, and the connecting portion with a single copper plate material, a high technical level is required, and the cost is high.
(3) Copper is harder than aluminum, extrusion is poor in formability (ie, yield is poor), and cost is high.

  The present invention has been made in view of such circumstances, and provides a high-frequency feed line and a high-frequency feed line manufacturing method that can achieve high positioning accuracy of the inner cylinder part with respect to the outer cylinder part and have a good yield in formability. For the purpose.

  The high-frequency power supply line of the present invention has a conductor portion in which a plurality of connecting portions are provided between the outer cylinder portion and the inner cylinder portion.

  According to the said structure, since it has a some connection part between an inner cylinder part and an outer cylinder part, the positioning accuracy of an inner cylinder part can be taken high and a high frequency resistance can be made low.

  In the above-described configuration, it is desirable that convex connection portions are provided as the plurality of connection portions of the inner cylinder portion so that they are brought into contact with the inner wall of the outer cylinder portion. By doing in this way, since each of an inner cylinder part and an outer cylinder part is produced separately, the yield of a moldability improves and cost reduction can be aimed at.

  Moreover, in the said structure, it is desirable to provide the guidance groove | channel which the said convex connection part engages in the inner wall of the said outer cylinder part. By doing in this way, the positioning accuracy of an inner cylinder part can be taken still higher. That is, depending on the processing accuracy of the inner wall of the outer cylinder part, the inner cylinder part may be displaced when the inner cylinder part is rotated in the circumferential direction with respect to the outer cylinder part. By fixing the position of the tube portion, it is possible to prevent the displacement of the inner tube portion with respect to the outer tube portion. Of course, it is needless to say that the cause of the positional deviation is not only the processing accuracy of the inner wall of the outer cylinder portion but also the processing accuracy of the tip of the convex connection portion.

  Further, in the above configuration, it is desirable that the convex connection portion is pressure-bonded to the inner wall of the outer cylinder portion. By doing in this way, the positioning accuracy of an inner cylinder part can be taken still higher.

  In the method for manufacturing a high-frequency power supply line according to the present invention, a step of providing an inner cylinder portion having a plurality of convex connection portions on an outer wall, and an outer cylinder portion in which the convex connection portions fit on the inner wall are inserted into the inner cylinder portion. And a step of obtaining a high-frequency power supply line having a conductor portion in which the convex connection portion is in contact with the inner wall of the outer cylinder portion by narrowing down the outer cylinder portion.

  According to the above method, since the inner cylinder part and the outer cylinder part are connected by the plurality of convex connection parts provided on the outer wall of the inner cylinder part, the positioning accuracy of the inner cylinder part can be increased, and the high frequency resistance is reduced. it can. Moreover, since each of the inner tube portion and the outer tube portion is separately manufactured, the formability of the inner tube portion and the outer tube portion is improved as compared with the case where the inner tube portion and the outer tube portion are integrally formed with a single copper plate material. Yield is improved and costs can be reduced.

  In the above method, it is desirable that the number of the convex coupling portions is three or more. By doing in this way, the positioning accuracy of an inner cylinder part can be taken high.

  Further, in the above method, it is desirable that a guiding groove with which the convex connection portion is engaged is provided on the inner wall of the outer cylinder portion. By doing in this way, the positioning accuracy of an inner cylinder part can be taken still higher.

  Moreover, in the said method, it is desirable to crimp the said convex connection part to the inner wall of the said outer cylinder part by restrict | squeezing the said outer cylinder part. By doing in this way, position shift with respect to the outer cylinder part of an inner cylinder part can be prevented.

  The present invention can provide a high-frequency power supply line with high positioning accuracy of the inner cylinder part with respect to the outer cylinder part and having a good moldability yield.

The perspective view which shows the general appearance of the conductor part of the high frequency electric power feeding line which concerns on Embodiment 1 of this invention 1 is an application example of the high-frequency power supply line in FIG. 1 and is a perspective view showing an overview of the conductor part of the high-frequency power supply line having two connecting portions. 1 is an application example of the high-frequency power supply line in FIG. 1 and is a perspective view showing an overview of a conductor portion of the high-frequency power supply line having three connecting portions. The perspective view which shows the general appearance of the conductor part of the high frequency electric power feeding line which concerns on Embodiment 2 of this invention The perspective view which shows the general appearance of the conductor part of the high frequency electric power feeding line which concerns on Embodiment 3 of this invention. The perspective view which shows the general view of the conductor part of the high frequency electric power feeding line which concerns on Embodiment 4 of this invention. The perspective view which shows schematically the construction method for manufacturing the high frequency electric power feeding line of FIG. FIG. 5 is a perspective view schematically showing a construction method for manufacturing the high-frequency feed line in FIG. 5. A perspective view showing the appearance of a conventional high-frequency feed line Longitudinal sectional view of an example using another conductor by extruding copper of the high-frequency feed line in FIG.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments for carrying out the invention will be described in detail with reference to the drawings.

(Embodiment 1)
FIG. 1 is a perspective view showing an overview of a conductor portion of a high-frequency feed line according to Embodiment 1 of the present invention. In the figure, a high-frequency power supply line 1 according to the present embodiment includes an inner cylinder portion 2a and a concentric outer cylinder integrally connected to the inner cylinder portion 2a over the entire length in the longitudinal direction by four connecting portions 2c. It has the double cylindrical conductor part 2 provided with the part 2b. The conductor portion 2 is used by being embedded in an insulator 300 in the same manner as the conventional high-frequency power supply line 100 shown in FIG. 9 or FIG. In FIG. 1, the insulator 300 is not shown. The four connecting portions 2c that connect the inner cylindrical portion 2a and the outer cylindrical portion 2b are arranged at a predetermined interval (for example, an interval of 90 degrees) in the circumferential direction.

  As described above, the high-frequency power supply line 1 according to the present embodiment has the conductor portion 2 in which the four connecting portions 2c are provided between the inner cylindrical portion 2a and the outer cylindrical portion 2b. Therefore, the conventional inner cylindrical portion 200a is provided. The positioning accuracy of the inner cylinder portion 2a can be increased and the high-frequency resistance can be lowered as compared with the high-frequency feeder 100 having only one connecting portion 200c between the outer cylinder portion 200b and the outer cylinder portion 200b.

  In addition, the connection part 2c which connects the inner cylinder part 2a and the outer cylinder part 2b is not limited to four, What is necessary is just at least two. FIG. 2 shows an overview of the high-frequency feed line 10 having two connecting portions 2c. FIG. 3 shows an overview of the high-frequency feed line 20 having three connecting portions 2c. The connecting portions 2c are arranged at intervals of 180 degrees in the high-frequency power supply line 10 shown in FIG. 2, and are arranged at intervals of 120 degrees in the high-frequency power supply line 20 shown in FIG.

(Embodiment 2)
FIG. 4 is a perspective view showing an overview of the conductor portion of the high-frequency feed line according to Embodiment 2 of the present invention. In the figure, the high-frequency power supply line 30 of the present embodiment includes an inner cylinder part 31a having a convex connection part 31c as four connection parts, and an outer cylinder part 31b into which the inner cylinder part 31a is inserted 2 It has a heavy cylindrical conductor 31. The four convex connecting portions 31c of the inner cylinder portion 31a are arranged at a predetermined interval (for example, an interval of 90 degrees) in the circumferential direction of the inner cylinder portion 31a, and each is formed over the entire length in the longitudinal direction of the inner cylinder portion 31a. Has been. Further, the tips of the four convex connecting portions 31c are at a height at which they contact the inner wall of the outer cylindrical portion 31b. By providing convex connection parts 31c as four connection parts of the inner cylinder part 31a and bringing them into contact with the inner wall of the outer cylinder part 31b, each of the inner cylinder part 31a and the outer cylinder part 31b is separately provided. Since it is manufactured, the yield of moldability is improved and the cost can be reduced.

  As described above, the high-frequency power supply line 30 according to the present embodiment is provided with the convex connecting portions 31c as the four connecting portions in the inner cylindrical portion 31a, and makes each convex connecting portion 31c contact the inner wall of the outer cylindrical portion 31b. Since it comprised as mentioned above, each of the inner cylinder part 31a and the outer cylinder part 31b will be produced separately, and compared with the case where the inner cylinder part and the outer cylinder part like the conventional one are integrally formed with one copper plate material. As a result, the yield of moldability is improved and the cost can be reduced.

  In addition, the number of the convex connection parts 31c is not limited to four, and it is sufficient if there are at least two as in the first embodiment.

(Embodiment 3)
FIG. 5 is a perspective view showing an overview of the conductor portion of the high-frequency feed line according to Embodiment 3 of the present invention. In the figure, the high-frequency power supply line 40 of the present embodiment includes an inner cylinder part 41a having a convex connection part 41c as four connection parts, and an outer cylinder part 41b into which the inner cylinder part 41a is inserted 2 It has a heavy cylindrical conductor 41. The inner cylinder portion 41a has the four convex connecting portions 41c as in the inner cylinder portion 31a of the high-frequency feed line 30 of the second embodiment described above, but in this embodiment, the inner wall of the outer cylinder portion 41b. There is a difference in that it has a guide groove 41d with which the convex connection part 41c of the inner cylinder part 41a is engaged.

  The convex connecting part 41c of the inner cylinder part 41a has an arcuate tip, and the guiding groove 41d of the outer cylinder part 41b is also arcuate. By providing the tip of the convex connecting portion 41c with a rounded shape and the guiding groove 41d also having an arc shape, the convex connecting portion 41c can be easily engaged with the guiding groove 41d.

  As described above, the high-frequency power supply line 40 according to the present embodiment is provided with the guide groove 41d in which the convex coupling portion 41c engages with the inner wall of the outer cylinder portion 41b, and thus the positioning accuracy of the inner cylinder portion 41a is further increased. be able to. That is, depending on the processing accuracy of the inner wall of the outer cylinder portion 41b, the inner cylinder portion 41a may be displaced when the inner cylinder portion 41a rotates in the circumferential direction with respect to the outer cylinder portion 41b. By fixing the position of the inner cylinder part 41a with respect to the cylinder part 41b, it is possible to prevent the positional deviation of the inner cylinder part 41a with respect to the outer cylinder part 41b. Of course, it is needless to say that the cause of the positional deviation is not only the processing accuracy of the inner wall of the outer cylinder portion 41b but also the processing accuracy of the tip portion of the convex connection portion 41c.

  In addition, although each of the guiding groove 41d and the convex connecting portion 41c is rounded, other than rounding, for example, a triangular shape may be used. Moreover, the number of the convex connection parts 41c is not limited to four, and it is sufficient that there are at least two as in the first embodiment.

(Embodiment 4)
FIG. 6 is a perspective view showing an overview of a conductor portion of a high-frequency feed line according to Embodiment 4 of the present invention. In the figure, the high-frequency power supply line 50 of the present embodiment is similar to the high-frequency power supply line 30 of the second embodiment described above, and includes an inner cylinder portion 51a having convex connection portions 51c as four connection portions, It has a double cylindrical conductor part 51 provided with an outer cylinder part 51b into which the inner cylinder part 51a is inserted, but differs in that the convex connection part 51c is crimped to the inner wall of the outer cylinder part 51b. There is. By crimping the convex connecting part 51c to the inner wall of the outer cylinder part 51b, the inner cylinder part 51a can be fixed to the outer cylinder part 51b in the same manner as the high-frequency power supply line 30 of the second embodiment described above. It is possible to prevent displacement of the inner cylinder portion 51a with respect to the outer cylinder portion 51b.

  FIG. 7 is a perspective view schematically showing a construction method for manufacturing the high-frequency power supply line 50 of the present embodiment. In the same figure, after producing the inner cylinder part 51a which has four convex connection parts 51c in an outer wall, the outer cylinder part 51b in which each convex connection part 51c of the inner cylinder part 51a fits in an inner wall is produced further. After producing the inner cylinder part 51a and the outer cylinder part 51b, the outer cylinder part 51b is inserted into the inner cylinder part 51a. Next, the ring-shaped outer cylinder part die 60 having an inner diameter slightly smaller than the diameter of the outer cylinder part 51b is passed through the outer cylinder part 51b, and the outer cylinder part 51b is narrowed while being moved. Thereby, the conductor part 51 which each convex connection part 51c of the inner cylinder part 51a contact | adhered to the inner wall of the outer cylinder part 51b is obtained. By burying the conductor portion 51 in the above-described insulator 300 (see FIG. 9 or FIG. 10), the high-frequency power supply line 50 is obtained.

  As described above, the high-frequency power supply line 50 according to the present embodiment presses the convex connection part 51c of the inner cylinder part 51a to the inner wall of the outer cylinder part 51b, so that the positioning accuracy of the inner cylinder part 51a can be further increased. it can.

  In addition, the number of the convex connection parts 51c is not limited to four, and it is sufficient that there are at least two as in the first embodiment.

  Also in the third embodiment described above, the convex connecting portion 41c may be pressure-bonded to the inner wall of the outer cylinder portion 41b. FIG. 8 is a perspective view schematically showing a construction method for manufacturing the high-frequency feed line 40 of the third embodiment. In the same figure, after producing the inner cylinder part 41a which has four convex connection parts 41c in an outer wall, the outer cylinder part 41b in which each convex connection part 41c of the inner cylinder part 41a fits in an inner wall is produced. Here, in the production of the inner cylinder portion 41a, the tip end portion of each convex connecting portion 41c is formed in an arc shape, and in the production of the outer cylinder portion 41b, each guide groove 41d is in an arc shape. To form. Thus, after producing the inner cylinder part 41a and the outer cylinder part 41b, the outer cylinder part 41b is inserted in the inner cylinder part 41a. Next, using the ring-shaped outer cylinder part die 70 having an inner diameter slightly smaller than the diameter of the outer cylinder part 41b, the outer cylinder part 41b is narrowed down while passing through the outer cylinder part 41b. Thereby, the conductor part 41 which each convex connection part 41c contact | adhered to the guide groove 41d of the outer cylinder part 41b is obtained. By burying the conductor portion 41 in the above-described insulator 300 (see FIG. 9 or FIG. 10), the high-frequency power supply line 40 is obtained.

1, 10, 20, 30, 40, 50 High-frequency feed lines 2, 31, 41, 51 Conductor portions 2a, 31a, 41a, 51a Inner tube portions 2b, 31b, 41b, 51b Outer tube portions 2c, 31c, 41c, 51c Connecting part 41d Guide groove 60, 70 Die for outer cylinder part

Claims (8)

  A high frequency power supply line having a conductor portion provided with a plurality of connecting portions between an outer tube portion and an inner tube portion.   The high frequency power supply line according to claim 1, wherein the inner cylinder part has a convex connection part as the plurality of connection parts, and the convex connection part is in contact with an inner wall of the outer cylinder part.   The high-frequency power supply line according to claim 2, wherein a guiding groove with which the convex connection portion engages is provided on an inner wall of the outer cylinder portion.   The high-frequency power supply line according to claim 2, wherein the convex connection part is crimped to the inner wall of the outer cylinder part. Providing an inner cylinder portion having a plurality of convex connecting portions on the outer wall;
Inserting the outer cylinder part into which the convex connection part fits in the inner wall into the inner cylinder part;
Obtaining a high-frequency feed line having a conductor portion in which the convex connecting portion is in contact with the inner wall of the outer cylinder portion by narrowing the outer cylinder portion;
A method of manufacturing a high-frequency power supply line comprising:   The method for manufacturing a high-frequency feed line according to claim 5, wherein the number of the convex connection portions is three or more.   The manufacturing method of the high frequency electric power feeding line according to claim 5 or 6 which provided a guide groove with which said convex connection part engages in an inner wall of said outer cylinder part.   The method for manufacturing a high-frequency feed line according to claim 5 or 6, wherein the convex connecting portion is crimped to an inner wall of the outer cylinder portion by narrowing the outer cylinder portion.

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