JP4234656B2 - Waveguide connection structure - Google Patents

Description

Relates connection structure of the present invention is a waveguide, and more particularly, to a connection structure of a waveguide in which the two waveguides of the axis of the waveguide to be connected by matched.

The waveguide has a duct portion having a waveguide, and a flange portion provided at an end of the duct portion and opening the waveguide.
And the some waveguide is connected by connecting those flange parts.
On the other hand, when connecting a plurality of waveguides, it is necessary to match the waveguides in order to reduce the propagation loss as much as possible.
Therefore, conventionally, two knock pins are provided in the flange portion of one of the two waveguides to be connected, and two positioning holes are provided in the flange portion of the other waveguide, and these knock pins are positioned. The waveguide is matched by inserting it into the hole.
JP-A-6-177601

However, in the conventional technique using two knock pins as described above, one of the two knock pins is formed with a size that can be inserted into the inner peripheral surface of the positioning hole without any gap, but the other of the two knock pins is From the standpoint of preventing damage to the knock pin and positioning hole, it is dimensioned so that it can be inserted with a slight clearance between it and the inner peripheral surface of the positioning hole. In this state, it is difficult to connect the waveguides, which is disadvantageous in reducing the propagation loss of the waveguides.
The present invention has been devised in view of the above circumstances, and an object of the present invention is to connect the waveguides with the same axis center of the two waveguides, thereby reducing the propagation loss of the waveguides. and to provide a connection structure of in advantageous waveguide.

In order to achieve the above object, the present invention relates to two waveguides having a pipe part having a waveguide and a flange part provided at an end of the pipe part and opening the waveguide. The waveguides of the two waveguides are connected by aligning the end faces of the portions and connecting the flange portions, and the flange portions of the respective waveguides are respectively centered on the axis centers of the waveguides. A circumferential surface having the same radius is provided, and a knock pin for positioning about the axis of the waveguide is provided on a flange portion of one of the two waveguides, and the two guides are provided. A long groove extending along the radial direction of the flange portion and inserted with the knock pin is provided in the flange portion of the other waveguide of the wave tubes, and the circumferential surface of the flange portion of each waveguide Is located on a virtual circumferential surface having the radius Aligned the end faces of the urchin the flange portion, the knock pin is connected flange portions of the two waveguides in the inserted state to the elongated grooves, the circumferential has an inner diameter of the same size as the circumferential surface A positioning member having an inner peripheral surface portion extending along the direction and an elastic portion provided to face the inner peripheral surface portion is provided, and the circumferential surfaces of the flange portions of the two waveguides are Each circumferential surface is abutted against the inner circumferential surface portion by the elastic portion and located on the inner circumferential surface portion of the positioning member, whereby the circumferential surface of the flange portion of each waveguide is the virtual circle. The positioning member is located on a circumferential surface, and the positioning member includes a single body having a larger contour than the circumferential surface and having a thickness in the axial direction of the circumferential surface, and is penetrated in the thickness direction of the body. The inner peripheral surface portion is configured by the inner peripheral surface of the hole and is opposed to the inner peripheral surface portion. An elastic piece extending along the inner peripheral surface of the hole by a groove penetrating in the thickness direction on the inner peripheral portion of the hole is elastically deformable in the radial direction of the inner peripheral surface of the hole. The elastic part is formed of the elastic piece .
Further, the present invention provides two waveguides having a duct portion having a waveguide and a flange portion provided at an end portion of the duct portion and opening the waveguide, and having end faces of the flange portions. In addition, the waveguides of the two waveguides are connected by connecting the flange portions, and each of the flange portions of the waveguides has a circle with the same radius centered on the axis of the waveguides. A peripheral surface is provided, and a knock pin for positioning around the axis of the waveguide is provided on a flange portion of one of the two waveguides, A long groove extending along the radial direction of the flange portion and into which the knock pin is inserted is provided in the flange portion of the other waveguide, and the circumferential surface of the flange portion of each waveguide is the radius. The franc to be located on a virtual circumferential surface having The flange portions of the two waveguides are connected in a state where the end surfaces of the portions are aligned and the knock pin is inserted into the long groove, and have an inner diameter of the same dimension as the circumferential surface along the circumferential direction. An extending inner peripheral surface portion, a pair of elastic pieces extending along the inner peripheral surface from both sides in the circumferential direction of the inner peripheral surface portion, and a fastening tool for tightening in a direction in which the pair of elastic pieces approach each other The circumferential surface of the flange portion of the two waveguides is located on the inner circumferential surface portion of the positioning member, and each circumferential surface is formed by the fastening tool and the pair of elastic pieces. It is tightened on the surface portion, and the circumferential surface of the flange portion of each waveguide is thereby located on the virtual circumferential surface.

  In the present invention, since the axes of the waveguides of the two waveguides to be connected are matched and connected in a state where the postures around the axes are matched, two knock pins and two positioning pins are connected. Propagation loss can be significantly reduced compared to conventional waveguide connection methods and connection structures using holes.

  In the present invention, the flange portions of the two waveguides are provided with circumferential surfaces having the same radius around the axis of the waveguides, and the flange portions of the two waveguides are provided with reference to the circumferential surfaces. The above objective was achieved by linking.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a front view of a state in which three waveguides are connected, FIG. 2A is a front view of the first waveguide, FIG. 1B is a view taken in the direction of arrow B in FIG. Is a front view of the second waveguide, (B) is a view from arrow B of (A), FIG. 4 (A) is a side view of the third waveguide, and (B) is a view from arrow B of (A). FIG. 5A is a front view of the positioning member, and FIG. 5B is a view taken in the direction of arrow B in FIG.
In FIG. 1, a first waveguide 10 and a second waveguide 12 are connected with a third waveguide 14 interposed therebetween, and in this embodiment, two positioning members 16 are used for the connection.

As shown in FIG. 2, the first waveguide 10 has a duct portion 22 having a waveguide 20, and flange portions 24 and 26 provided at both ends of the duct portion 22.
The pipe section 22 is formed in a cylindrical shape, and the waveguide 20 has a rectangular cross section and extends linearly over the entire length of the pipe section 22 along the axis of the pipe section 22. Is open to the flange portions 24, 26.
Of the flange portions 24 and 26, the flange portion 26 connected to the third waveguide 14 has an outer peripheral portion formed by a circumferential surface 28 having a radius centered on the axis of the waveguide 20. As a method for making such a circumferential surface 28, for example, the third waveguide 14 is set on a table of a milling machine, the center of the turning motion of the cutter is aligned with the axis of the waveguide 20, and then the cutter is turned. And cutting the flange portions 24 and 26.
A central contact surface 2602 having a small diameter and a flat shape is formed near the center of the end surface of the flange portion 26 so as to surround the opening of the waveguide 20, and the periphery of the central contact surface 2602 is formed as a recess 2604. The outer peripheral portion of the end face is formed as an annular flat outer peripheral abutment surface 2606 having the same height as the central abutment surface 2602, and the flange portion 26 is connected to the flange portion of the third waveguide 14 when the flange portion 26 is connected to the flange portion. The portion 26 is in contact with the flange portion of the third waveguide 14 without any gap, and no gap is created around the portion where the waveguide 20 is connected.
Four bolt insertion holes 2608 are formed in the recesses 2604 near the outer periphery of the end face of the flange portion 26, and one knock pin 30 projects in a direction parallel to the axis of the waveguide 20, One long groove 31 is formed so as to extend along the radial direction of the flange portion 26, and an outer end thereof is opened outward in the radial direction of the flange portion 26.

As shown in FIG. 3, the second waveguide 12 has a duct section 34 having a waveguide 32, and flange sections 36 and 38 provided at both ends of the duct section 34.
The pipe section 34 is formed in a cylindrical shape, and the waveguide 32 is formed in a rectangular shape having the same cross section as the waveguide 20 of the first waveguide 10, and the pipe section along the axial center of the pipe section 34. It extends linearly over the entire length of 34, and both ends of the waveguide 32 open to the flange portions 36 and 38.
Of the flange portions 36 and 38, the flange portion 36 connected to the third waveguide 14 is formed by a circumferential surface 40 having a radius centered on the axis of the waveguide 32. The method of making the circumferential surface 40 is the same as that of the first waveguide 10.
A flat central contact surface 3602 having a small diameter is formed at a location near the center of the end surface of the flange portion 36 so as to surround the opening of the waveguide 32, and the periphery of the central contact surface 3602 is formed as a recess 3604. The outer peripheral portion of the end surface is formed as an annular flat outer peripheral abutment surface 3606 having the same height as the central abutment surface 3602, and when the flange portion 36 is connected to the flange portion of the third waveguide 14, a flange is formed. The portion 36 is in contact with the flange portion of the third waveguide 14 without any gap, and no gap is created around the portion where the waveguide 32 is connected.
Four bolt insertion holes 3608 are formed at the concave portion 3604 near the outer periphery of the end surface of the flange portion 36, and one knock pin 42 projects in a direction parallel to the axis of the waveguide 32. One long groove 43 is formed so as to extend along the radial direction of the flange portion 36, and its outer end is opened outward in the radial direction of the flange portion 36.

As shown in FIG. 4, the third waveguide 14 has a duct portion 46 having a waveguide 44, and flange portions 48 and 50 provided at both ends of the duct portion 46.
The pipe section 46 has a rectangular cross section.
The waveguide 44 is formed in a rectangular shape having the same cross-section as the waveguides 20 and 32 of the first and second waveguides 10 and 12, and extends over the entire length of the pipe section 46 along the axis of the pipe section 46. The waveguide 44 extends in a straight line, and both ends of the waveguide 44 open to the flange portions 48 and 50.
The flange portions 48 and 50 are formed by circumferential surfaces 52 and 54 having a radius centered on the axis of the waveguide 44. More specifically, the circumferential surface 52 of the flange portion 48 connected to the flange portion 26 of the first waveguide 10 has a radius of the same dimension as the circumferential surface 28 of the flange portion 26 of the first waveguide 10. Is formed. Further, the circumferential surface 54 of the flange portion 50 connected to the flange portion 36 of the second waveguide 12 is formed with the same radius as the circumferential surface 40 of the flange portion 36 of the second waveguide 12. Yes. In the present embodiment, the circumferential surfaces 28, 40, 52, and 54 are formed with the same radii. The method for forming the circumferential surfaces 52 and 54 having a radius centered on the axis of the waveguide 44 is the same as in the case of the first waveguide 10.

An end surface 4802 of the flange portion 48 is formed as a flat surface, and screw holes 4808 corresponding to the four bolt insertion holes 2608 of the flange portion 26 of the first waveguide 10 are formed in the end surface 4802.
In addition, a long groove 56 into which the knock pin 30 of the flange portion 26 is inserted extends along the radial direction of the flange portion 48 at a location near the outer periphery of the end surface 4802, and its outer end extends outward in the radial direction of the flange portion 48. Further, a knock pin 57 that is opened and inserted into the long groove 31 of the flange portion 26 protrudes in a direction parallel to the axis of the waveguide 44.
When the knock pin 30 is inserted into the long groove 56 and the knock pin 57 is inserted into the long groove 31, the outer peripheral surface of the knock pins 30 and 57 and the pair of side surfaces constituting the long grooves 56 and 31 come into contact with each other without gaps, And the knock pins 30 and 57 are formed in the dimension which can move along the extending direction of these long grooves 56 and 31 in the long grooves 56 and 31 in the state contacted without gap.
Further, the end surface 5002 of the flange portion 50 is formed as a flat surface, and screw holes 5008 corresponding to the four bolt insertion holes 3608 of the flange portion 36 of the second waveguide 12 are formed in the end surface 5002.
Further, a long groove 58 into which the knock pin 42 of the flange portion 36 is inserted is formed extending along the radial direction of the flange portion 48 at a location near the outer periphery of the end surface 5002, and the outer end thereof is radially outward of the flange portion 50. Further, a knock pin 59 that is opened and is inserted into the long groove 43 of the flange portion 36 protrudes in a direction parallel to the axis of the waveguide 44.
When the knock pin 42 is inserted into the long groove 58 and the knock pin 59 is inserted into the long groove 43, the outer peripheral surface of the knock pins 42 and 59 and the pair of side surfaces constituting the long grooves 58 and 43 are in contact with each other without gaps. In addition, the knock pins 42 and 59 are formed in such a dimension that they can move in the long grooves 58 and 43 along the extending direction of the long grooves 58 and 43 in a state where they are in contact with each other without a gap.
Further, the end portion of the conduit portion 46 facing the flange portion 48 is formed as a flat end surface 4602, and the end surface 4602 has a rectangular frame shape. Similarly, the end portion of the conduit portion 46 facing the flange portion 50 is also formed as a flat end surface 4604, and the end surface 4604 also has a rectangular frame shape. And four screw holes 4610 are formed in each end face 4604, respectively.

As shown in FIG. 5, the positioning member 16 has a rectangular plate-like body 60, and a positioning hole 62 is provided through the center of the body 60 in the thickness direction of the body 60. Both ends are formed as flat end surfaces 6002.
The inner peripheral surface 6202 of the positioning hole 62 is formed with the same radius as the peripheral surfaces 28, 40, 52, 54 of the first, second, and third waveguides 10, 12, 14.
Two elastic pieces 64 are formed in a half of the inner peripheral portion of the positioning hole 62 so as to be elastically deformable in the radial direction of the positioning hole 62 at intervals in the circumferential direction.
The elastic piece 64 extends along the circumferential direction of the positioning hole 62, and all the portions except the base portion thereof are separated from the inner circumferential portion by a groove 6402 penetrating in the thickness direction of the body 60. Has been. And the front-end | tips are arrange | positioned in the direction which mutually faces, and the inner surface 6404 of each elastic piece 64 comprises a part of inner peripheral surface 6202 of the hole 62 for positioning.

These two elastic pieces 64 have the circumferential surfaces 28, 40, 52 of the flange portions 26, 36, 48, 50 in a state where the flange portions 26, 36, 48, 50 are inserted into the positioning holes 62. , 54, and the flange portions 26, 36, 48, 50 are formed so as to abut on the inner peripheral surface portion 6202A opposite to the inner peripheral surface portion 6202 where the two elastic pieces 64 are provided. More specifically, a groove 6402 is formed after the positioning hole 62 is formed, and all the portions of the elastic piece 64 except the base portion of the elastic piece 64 are separated from the body 60 by the groove 6402 so that the elastic piece 64 is formed on the inner periphery. Therefore, when the flange portions 26, 36, 48, 50 are inserted into the positioning holes 62, the elastic pieces 64 are arranged on the circumferential surfaces 28, 40, 52,. 54, and the flange portions 26, 36, 48 and 50 are brought into contact with the inner peripheral surface portion 6202A.
Bolt insertion holes 6004 are formed at four positions of the body 60 around the positioning hole 62 so as to correspond to the four screw holes 4610 of each end surface 4604 of the third waveguide 14.

Next, a procedure for connecting the first, second, and third waveguides 10, 12, and 14 using the two positioning members 16 will be described.
First, the two positioning members 16 are incorporated in the third waveguide 14 so that the flange portions 48 and 50 of the third waveguide 14 enter the positioning holes 62, respectively, and the end surface 6002 of the positioning member 16 is connected to the pipe line. It is applied to the end surfaces 4602 and 4604 of the portion 46.
By incorporating the positioning member 16, each elastic piece 64 receives a reaction force from the circumferential surfaces 52 and 54 of the third waveguide 14, and the positioning member 16 itself has a circumferential surface location 6202 A of the circumferential surfaces 52 and 54. Is displaced in the radial direction of the positioning hole 62 so that the circumferential surface portion 6202A is applied to the circumferential surfaces 52 and 54.
In this state, the bolt B1 is screwed into the screw hole 4610 through the bolt insertion hole 6004, and the positioning member 16 is fastened and fixed to the end surface 4602.

Next, the flange portion 26 of the first waveguide 10 is inserted into the positioning hole 62 of the positioning member 16 so that the flange portion 26 faces the flange portion 48 of the third waveguide 14, and the knock pins 30, 57 are inserted. Are inserted into the long grooves 56 and 31, and the central contact surface 2602 and the outer peripheral contact surface 2606 of the flange portion 26 are in contact with the end surface 4802.
By inserting the flange portion 26 into the positioning hole 62, the circumferential surface 28 of the flange portion 26 receives an elastic force from each elastic piece 64 in the positioning hole 62, and the flange portion 26 itself is the circumferential surface portion 6202A. The position of the circumferential surface 28 on the side opposite to the side where each elastic piece 64 is located is applied to the circumferential surface location 6202A. Thereby, the centers of the circumferential surfaces 28 and 52 are matched, and the axes of the waveguide 20 and the waveguide 44 are matched via the positioning hole 62.

When the location of the circumferential surface 28 is applied to the circumferential location 6202A, the knock pins 30 and 57 move within the long grooves 56 and 31, so that the above-described application is ensured and the waveguide 20 and the waveguide 20 are guided. The axis of the waveguide 44 is matched.
Further, by inserting the knock pins 30 and 57 into the long grooves 56 and 31, the postures of the waveguides 20 and 44 in the circumferential direction of the circumferential surfaces 28 and 52 are matched. In this case, since the knock pins 30, 57 and the long grooves 56, 31 are located near the outer periphery of the flange portions 26, 48 away from the waveguides 20, 44, accuracy errors of the knock pins 30, 57 and the long grooves 56, 31 are introduced. The influence on the positioning of the waveguides 20 and 44 around the axis is extremely small, and the generated propagation loss can be kept extremely small.
In this state, the bolt B2 is screwed into the screw hole 4808 through the bolt insertion hole 2608, the central contact surface 2602 and the outer peripheral contact surface 2606 are tightened to the end surface 4802, and the first waveguide 10 is connected to the third waveguide. 14 is fixed.

Similarly, the flange portion 36 of the second waveguide 12 is inserted into the positioning hole 62 of the positioning member 16 so that the flange portion 36 faces the flange portion 50 of the third waveguide 14, and the knock pins 42, 59 are inserted. Are inserted into the long grooves 58 and 43, and the center contact surface 3602 and the outer peripheral contact surface 3606 of the flange portion 36 are in contact with the end surface 5002.
By inserting the flange portion 36 into the positioning hole 62, the circumferential surface 40 of the flange portion 36 receives the elastic force from each elastic piece 64 in the positioning hole 62, and the flange portion 36 itself becomes the circumferential surface portion 6202A. The position of the circumferential surface 40 on the side opposite to the side where each elastic piece 64 is located is applied to the circumferential surface location 6202A. As a result, the centers of the circumferential surfaces 40 and 54 are matched, and the axes of the waveguide 32 and the waveguide 44 are matched via the positioning hole 62. When the location of the circumferential surface 40 is applied to the circumferential location 6202A, the knock pins 42 and 59 move within the long grooves 58 and 43, so that the above-described application is ensured and the waveguide 32 and the waveguide 32 are guided. The axis of the waveguide 44 is matched.

Further, by inserting the knock pins 42 and 59 into the long grooves 58 and 43, the postures of the waveguides 32 and 44 in the circumferential direction of the circumferential surfaces 40 and 54 are matched. In this case, since the knock pins 42 and 59 and the long grooves 58 and 43 are located near the outer periphery of the flange portions 36 and 50 away from the waveguides 32 and 44, accuracy errors of the knock pins 42 and 59 and the long grooves 58 and 43 are introduced. The influence on the positioning of the waveguides 32 and 44 around the axial center is extremely small, and the generated propagation loss can be kept extremely small.
In this state, the bolt B3 is screwed into the screw hole 5008 through the bolt insertion hole 3608, the central contact surface 3602 and the outer peripheral contact surface 3606 are tightened to the end surface 5002, and the second waveguide 12 is connected to the third waveguide. 14 is fixed.

Therefore, the first waveguide 10 and the third waveguide 14 include the circumferential surface 28 of the flange portion 26 of the first waveguide 10 and the circumferential surface 52 of the flange portion 48 of the third waveguide 14. The flange portions 26 and 48 are combined with each other as a reference. In other words, the circumferential surface 28 of the flange portions 26 and 48 of the waveguides 10 and 14 is formed by the elastic piece 64 in the positioning hole 62 of the positioning member 16. , 52 are matched so as to be adjacent to each other on the same virtual circumferential surface, and the flange portions 26, 48 are matched, so that the waveguide 20 of the first waveguide 10 and the waveguide 44 of the third waveguide 14 are aligned. The axial centers are matched. Further, by inserting the knock pins 30 and 57 into the long grooves 56 and 31, the waveguides 20 of the first and third waveguides 10 and 14 in the circumferential direction of the circumferential surfaces 28 and 52, 44 axes are matched, and the axes of the two waveguides 20 and 44 Positioning of around is performed.
Therefore, the waveguides 20 and 44 of the first and third waveguides 10 and 14 are connected in a state in which the axes of the waveguides 20 and 44 are matched and the postures around the axes are matched.

Similarly, the second waveguide 12 and the third waveguide 14 are the circumferential surface 40 of the flange portion 36 of the second waveguide 12 and the circumferential surface of the flange portion 50 of the third waveguide 14. 54, the flange portions 36 and 50 are combined with each other. In other words, the elastic pieces 64 in the positioning holes 62 of the positioning member 16 cause the circumferential surfaces of the flange portions 36 and 50 of the waveguides 12 and 14 to be aligned. 40 and 54 are matched so as to be adjacent to each other on the same virtual circumferential surface, and the flange portions 36 and 50 are matched, so that the waveguide 32 of the second waveguide 12 and the waveguide 44 of the third waveguide 14 are combined. Further, by inserting the knock pins 42 and 59 into the long grooves 58 and 43, the waveguides 32 of the second and third waveguides 12 and 14 in the circumferential direction of the circumferential surfaces 40 and 54 are obtained. , 44 are matched, and the axis of rotation of the two waveguides 32, 44 is aligned. Positioning for is carried out.
Since the knock pins 30, 57, 42, 59 and the long grooves 56, 31, 58, 43 are separated from the axial center of the waveguides 32, 44, the knock pins 30, 57, 42, 59 and the long grooves 56, 31, 58 are provided. , 43 has an extremely small influence on the positioning of the waveguides 32 and 44 around the axis, and the generated propagation loss can be kept to a very small amount.
Therefore, according to the present embodiment, the axes of the waveguides 20, 32, and 44 of the first to third waveguides 10, 12, and 14 are matched, and the postures around those axes are matched. Since they are connected in a state, propagation loss can be remarkably reduced as compared with the conventional waveguide connection method and connection structure using two knock pins and two positioning holes.

Next, Example 2 will be described.
FIG. 6 is a sectional front view of a main part in a state where three waveguides are connected, and FIG. 7 shows a positioning member portion in the AA section of FIG.
Hereinafter, the same portions and members as in the first embodiment will be described with the same reference numerals, and the first waveguide 10 and the second waveguide 12 are connected with the third waveguide 14 interposed therebetween. In the embodiment, two positioning members 70 are used for these connections.
The configurations of the first to third waveguides 10, 12, and 14 are the same as those in the above embodiment.
The positioning member 70 has an annular plate-like body 72, and a positioning hole 74 is provided in the center of the body 72 in the thickness direction of the body 72, and both ends of the body 72 in the thickness direction are flat end surfaces 7202. It is formed as.
The inner peripheral surface 7402 of the positioning hole 74 is formed with a radius having the same dimensions as the peripheral surfaces 28, 40, 52, 54 of the first, second, and third waveguides 10, 12, 14.
A groove 76 extending in the radial direction of the positioning hole 74 and penetrating in the thickness direction of the body 72 is formed in a part of the body 72, and the groove 76 allows ( Alternatively, in the half portion of the body 72, two elastic pieces 78 are formed so as to be elastically deformable in the radial direction of the positioning hole 74 at intervals in the circumferential direction, and the positioning hole 74 facing the groove 76. The portion remains as an inner peripheral surface portion 7402A of the positioning hole 74.
The inner surface 7802 of each elastic piece 78 constitutes a part of the inner peripheral surface 7402 of the positioning hole 74, and a bolt insertion hole 7804 is formed at one tip of each elastic piece 78, and the other is a screw. A hole 7806 is formed.

Next, a procedure for connecting the first, second, and third waveguides 10, 12, and 14 using the two positioning members 70 will be described.
First, the flange portion 26 of the first waveguide 10 is opposed to the flange portion 48 of the third waveguide 14, the knock pins 30 and 57 are inserted into the long grooves 56 and 31, and the center contact surface 2602 of the flange portion 26 and The outer peripheral contact surface 2606 is in contact with the end surface 4802.
Next, the positioning member 70 is mounted over the circumferential surface 28 of the flange portion 26 and the circumferential surface 52 of the flange portion 48, the circumferential surfaces 28 and 52 are positioned in the positioning hole 74, and the positioning member 70 The end surface 7202 is in contact with the end surface 4602 of the third waveguide 14.
Next, the bolt B4 inserted into the bolt insertion hole 7804 of one elastic piece 78 is screwed into the screw hole 7806 of the other elastic piece 78, and the bolt B4 is tightened.
By tightening the bolt B4, the circumferential surfaces 28, 52 of the flange portions 26, 48 are tightened by the respective elastic pieces 78 in the positioning hole 74 and applied to the inner peripheral surface portion 7402A.

In this case, when the locations of the circumferential surfaces 28 and 52 are applied to the circumferential location 7402A, the knock pins 30 and 57 move within the long grooves 56 and 31, so that the above-described application is ensured, and the waveguide 20 and the axis of the waveguide 44 are matched.
Further, by inserting the knock pins 30 and 57 into the long grooves 56 and 31, the postures of the waveguides 20 and 44 in the circumferential direction of the circumferential surfaces 28 and 52 are matched. In this case, the influence of the accuracy errors of the knock pins 30 and 57 and the long grooves 56 and 31 on the positioning of the waveguides 22 and 44 around the axial center is extremely small, and the generated propagation loss can be kept very small.
In this state, the bolt B2 is screwed into the screw hole 4808 through the bolt insertion hole 2608, the central contact surface 2602 and the outer peripheral contact surface 2606 are tightened to the end surface 4802, and the first waveguide 10 is connected to the third waveguide. 14 is fixed.

Similarly, the flange portion 36 of the second waveguide 12 is opposed to the flange portion 50 of the third waveguide 14, the knock pins 42 and 59 are inserted into the long grooves 58 and 43, and the center abutment surface 3602 of the flange portion 36. The outer peripheral contact surface 3606 is in contact with the end surface 5002, the positioning member 70 is mounted over the circumferential surface 40 of the flange portion 36 and the circumferential surface 54 of the flange portion 50, and the circumferential surface 40 is placed in the positioning hole 74. , 54 are positioned, and the end surface 7202 of the positioning member 70 is brought into contact with the end surface 4604 of the third waveguide 14.
Next, the bolt B4 inserted into the bolt insertion hole 7804 of one elastic piece 78 is screwed into the screw hole 7806 of the other elastic piece 78, and the bolt B4 is tightened.
By tightening the bolt B4, the circumferential surfaces 40, 54 of the flange portions 36, 50 are tightened by the elastic pieces 78 in the positioning hole 74, and applied to the inner peripheral surface portion 7402A.

In this case, when the locations of the circumferential surfaces 40 and 54 are applied to the circumferential surface location 7402A, the knock pins 42 and 59 move within the long grooves 58 and 43, so that the above-described application is ensured, and the waveguide 32 and the axis of the waveguide 44 are matched.
Further, by inserting the knock pins 42 and 59 into the long grooves 58 and 43, the postures of the waveguides 32 and 44 in the circumferential direction of the circumferential surfaces 40 and 54 are matched. In this case, the knock pin 42,
59 and the long grooves 58 and 43 are positioned near the outer periphery of the flange portions 36 and 50 away from the axial centers of the waveguides 32 and 44. Therefore, the accuracy errors of the knock pins 42 and 59 and the long grooves 58 and 43 are the waveguide 32, The influence on the positioning around the axis 44 is extremely small, and the propagation loss generated can be kept to a very small amount.
In this state, the bolt B3 is screwed into the screw hole 5008 through the bolt insertion hole 3608, the central contact surface 3602 and the outer peripheral contact surface 3606 are fastened to the end surface 5002, and the second waveguide 10 is connected to the third waveguide. 14 is fixed.
In the second embodiment, if the first, second, and third waveguides 10, 12, and 14 are connected by the bolts B2 and B3, the positioning member 70 is the first, second, and third waveguides 10. , 12 and 14 or may remain attached.
Also in the second embodiment, as in the first embodiment, the axes of the waveguides 20, 32, and 44 of the first to third waveguides 10, 12, and 14 are matched, and the postures around these axes are the same. Since they are connected in a matched state, the propagation loss can be remarkably reduced as compared with the conventional waveguide connection method and connection structure using two knock pins and two positioning holes.

In Examples 1 and 2, when matching the circumferential surface of the flange portion of each waveguide so as to be positioned on the virtual circumferential surface, the inner circumferential surface of the shape that matches the shape of the circumferential surface Although the case where the positioning member having the location is used has been described, the positioning member having the location on the inner peripheral surface is not necessarily required, and the circumferential surface of the flange portion of each waveguide may be a single member or a plurality of members. The axial centers of the waveguides of the respective waveguides can be matched by tightening inward in the radial direction of the circumferential surfaces.
For example, as shown in FIG. 8A, a fastening member 80 having a triangular frame shape in cross section and having an open portion 80A is provided in a part thereof, and the circumferential surfaces of the flange portions of the two waveguides are provided on the fastening member 80. The circumferential surfaces of the flange portions of the two waveguides may be tightened by bolts B and nuts N disposed between the open portions 80A.

Alternatively, as shown in FIG. 8B, there is provided a fastening member 88 formed by connecting two fastening pieces 82 and 84 having a concave shape in cross section with a hinge 86, and the flange portions of the two waveguides. The circumferential surfaces may be sandwiched between the fastening pieces 82 and 84, and the circumferential surfaces of the flange portions of the two waveguides may be fastened by bolts B and nuts N arranged at the tips of the fastening pieces 82 and 84.
When the fastening members 80 and 88 shown in FIGS. 8A and 8B are used, the fastening members 80 and 88 may be removed after the two waveguides are connected, or may remain attached. It is good.
In the first and second embodiments, the case where the positioning of the two waveguides around the axis of the waveguide is performed using a knock pin and a long groove. For example, the flange portion of each waveguide is described. Also, open grooves are formed on the circumferential surface of the circumferential surface of the circumferential surface in the radial direction, and a key is inserted into these grooves, so that the axis around the waveguide axis of the two waveguides can be reduced. Positioning can be performed, and the positioning means about the axis of the waveguide of the two waveguides is not limited to the knock pin and the long groove.
In the first and second embodiments, the case where the knock pins and the long grooves are provided in the flange portions of the two waveguides when the two waveguides are connected has been described. A knock pin may be provided in one of the portions, and a long groove may be provided in the flange portion of the other waveguide along the radial direction of the flange portion and into which the knock pin is inserted. However, if a knock pin is provided in one of the flange portions of the two waveguides and a long groove is provided in the flange portion of the other waveguide, for example, the flange portions protruding from the pins must be connected to each other. Alternatively, there may be a problem that the flange portions in which the long grooves are formed must be connected to each other. However, as in the first and second embodiments, the knock pins and the long grooves are respectively provided in the flange portions of the two waveguides. If provided, there is no such inconvenience, and the knock pin is always inserted and connected to the long groove.

It is a front view in the state where three waveguides were connected. It is explanatory drawing of a 1st waveguide. It is explanatory drawing of a 2nd waveguide. It is explanatory drawing of a 4th waveguide. It is explanatory drawing of a positioning member. It is a front view in the state where three waveguides were connected. It is a side view of the state where three waveguides were connected. It is explanatory drawing of a fastening member.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... 1st waveguide, 12 ... 2nd waveguide, 14 ... 3rd waveguide, 16, 70 ... Positioning member, 20, 32, 44 ... Waveguide, 28, 40, 52 54, circumferential surface, 30, 42, 57, 59 ... knock pin, 31, 43, 56, 58 ... long groove, 80, 88 ... fastening member.

Claims (5)

Two waveguides having a pipe part having a waveguide and a flange part provided at an end part of the pipe part and having the waveguide open to each other are aligned with the end faces of the flange parts, and the flange parts are connected to each other. By connecting the waveguides of two waveguides,
A circumferential surface having the same radius around the axis of each waveguide is provided on the flange portion of each waveguide,
A knock pin for positioning about the axis of the waveguide is provided on the flange portion of one of the two waveguides,
A flange portion of the other waveguide of the two waveguides is provided with a long groove extending along the radial direction of the flange portion and into which the knock pin is inserted,
A state in which the end face of the flange portion is aligned so that the circumferential surface of the flange portion of each waveguide is positioned on the virtual circumferential surface having the radius, and the knock pin is inserted into the long groove flange of the two waveguides is connected in,
A positioning member having an inner peripheral surface portion having an inner diameter of the same dimension as the circumferential surface and extending in the circumferential direction, and an elastic portion provided to face the inner peripheral surface portion is provided. ,
The circumferential surfaces of the flange portions of the two waveguides are positioned on the inner peripheral surface portion of the positioning member, and the respective circumferential surfaces are abutted against the inner peripheral surface portion by the elastic portion, whereby the respective waveguides The circumferential surface of the flange portion of the tube is located on the virtual circumferential surface,
The positioning member comprises a single body having a contour larger than the circumferential surface and having an axial thickness of the circumferential surface;
The inner peripheral surface portion is constituted by an inner peripheral surface of a hole penetrating in the thickness direction of the body,
The inner peripheral portion of the hole facing the inner peripheral surface portion extends along the inner peripheral surface of the hole by a groove penetrating in the thickness direction and elastically deforms in the radial direction of the inner peripheral surface of the hole. A possible elastic piece is formed by being displaced radially inward of the inner peripheral surface of the hole, and the elastic portion is constituted by the elastic piece.
A connection structure for a waveguide. 2. The waveguide connection structure according to claim 1, wherein the positioning member is attached to one of the two waveguides. Two waveguides having a pipe part having a waveguide and a flange part provided at an end part of the pipe part and having the waveguide open to each other are aligned with the end faces of the flange parts, and the flange parts are connected to each other. By connecting the waveguides of two waveguides,
A circumferential surface having the same radius around the axis of each waveguide is provided on the flange portion of each waveguide,
A knock pin for positioning about the axis of the waveguide is provided on the flange portion of one of the two waveguides,
A flange portion of the other waveguide of the two waveguides is provided with a long groove extending along the radial direction of the flange portion and into which the knock pin is inserted,
A state in which the end face of the flange portion is aligned so that the circumferential surface of the flange portion of each waveguide is positioned on the virtual circumferential surface having the radius, and the knock pin is inserted into the long groove The flanges of the two waveguides are connected with
An inner peripheral surface portion having an inner diameter of the same dimension as the circumferential surface and extending along the circumferential direction, and a pair of inner peripheral surface portions extending along the inner peripheral surface from both sides in the circumferential direction of the inner peripheral surface portion A positioning member having an elastic piece and a fastening tool for fastening in a direction in which these pair of elastic pieces approach each other is provided.
The circumferential surfaces of the flange portions of the two waveguides are positioned on the inner peripheral surface portion of the positioning member, and the respective circumferential surfaces are tightened on the inner peripheral surface portion by the clamp and the pair of elastic pieces. The circumferential surface of the flange portion of each waveguide is located on the virtual circumferential surface by
A connection structure for a waveguide. The knock pin and long groove connection structure according to claim 1 or 3 wherein the waveguide and being provided on the outer circumference side of the portion of the flange portion. The knock pin and the long groove are respectively provided in the flange portions of the two waveguides, and the knock pin of the flange portion of one of the two waveguides is the flange portion of the other waveguide. 4. The waveguide connection structure according to claim 1 , wherein the waveguide is inserted into the long groove, and the knock pin of the flange portion of the other waveguide is inserted into the long groove of the flange portion of the one waveguide. .

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