JP2001320201A - Connector for waveguide flange - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a connector for a waveguide flange for connecting two waveguide flanges and preventing the leakage of electromagnetic wave. SOLUTION: A connector 1 is composed of plural fitting members having groove parts fitted to the side faces of flanges of a pair of waveguides 11a and 11b, which are contacted while facing mutually, and equipped with electromagnetic wave absorbers inside the groove parts and the respective fitting members are linked while surrounding the peripheral edge of flanges of the waveguides 11a and 11b. Thus, the flanges of the waveguides 11a and 11b are mutually connected by these annular fitting members and the leakage of electromagnetic wave from the bonding part of the flanges of the waveguides 11a and 11b is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a waveguide flange connecting device for connecting two waveguide flanges.
The present invention relates to a connector for a waveguide flange that connects waveguide flanges to each other and that prevents electromagnetic wave leakage from a joint of the waveguide flanges.

[0002]

2. Description of the Related Art As a method of connecting two waveguides for transmitting electromagnetic waves, generally, a flange (waveguide flange) is provided at an end of each waveguide to connect these two flanges. Is used. As a method of connecting such flanges, for example, a bolt 61 and a nut 62 are used as shown in an external appearance example before connection in FIG. 9A and an external appearance example in FIG. 9B after connection. In this case, two flanges 52a and 52b are connected to each other.

Specifically, two waveguides 51a, 51b
A flange 52a having a square face at each end of the
52b and both flanges 52a, 52b
Holes 64 for passing bolts 61 at four corners of the surface
a, 64b are opened, and the two flanges 52a, 52b are connected and fixed by connecting the two flanges 52a, 52b to each other by fastening the nut 62 via the washer 63 on one side of the through hole 64a, 64b and the other side through the washer 63, thereby , 2
The two waveguides 51a and 51b are connected and fixed.

In the examples shown in FIGS. 1A and 1B, only one of the four pairs of through holes is denoted by reference numerals 64a and 64b.
And bolts, washers, and nuts secured by the pair of through holes 64a, 64b.
Only 1 to 63 are shown. Further, a screw or the like may be used instead of the bolt 61, and a circular surface or the like may be used as the shape of the surface of the flange.

However, in such a method of connecting the flanges, the flanges are connected by tightening four bolts or the like using, for example, a wrench or a screwdriver, and the flanges are removed by removing the bolts or the like. Therefore, connection and disconnection are extremely troublesome, and it is not possible to reduce the time spent for an inspection test performed by temporarily connecting waveguides, for example.

In order to solve such a problem, the purpose of the present invention is to simply connect the flanges to each other. For example, in a waveguide connecting structure described in Japanese Patent Application Laid-Open No. 9-83204, two It has been proposed to clamp the upper and lower portions of the flange of the waveguide by a spring force using a metal fitting. Further, for example, in a connection fitting for a pipe with a flange described in Japanese Patent Application Laid-Open No. 10-51201, a screw shaft is inserted from one side of a connection hole provided in a flange, and a tip end of the screw shaft is disposed on the opposite side. It has been proposed to engage the back surface of a screw support member to be used.

However, in these conventional examples, it is considered that there may be a case where the pressure on the joint surface is not sufficient as compared with a method of connecting the flanges using bolts or the like, for example. Leakage of the electromagnetic wave propagating through the waveguide from the end face becomes a problem.

In order to reduce such electromagnetic wave leakage, Japanese Patent Application Laid-Open No.
In the waveguide connection structure described in Japanese Patent Publication No. 502, it has been proposed to provide a radio wave absorber closely attached to the side surface of the abutting portion between the flanges on at least one of the flanges. Further, for example, in a waveguide flange described in Japanese Patent Application Laid-Open No. 9-223902, it has been proposed to cover a joint surface of the flange with an outer peripheral ring or the like provided on the flange. For example, in the waveguide flange described in Japanese Patent Application Laid-Open No. 9-312501, it has been proposed to insert a radio wave absorber into a groove formed on a contact surface of the waveguide flange.

However, in these conventional examples, the leakage of electromagnetic waves is reduced by remodeling the flange itself, and it is necessary to remodel individual flanges. As a result, there is a problem that versatility is low.

[0010]

As shown in the above conventional example, conventionally, for example, it is possible to easily connect flanges with a sufficient degree of adhesion, and to prevent electromagnetic waves from leaking from joints of the flanges. However, there is a problem that there is no inexpensive and highly versatile waveguide flange connector.
SUMMARY OF THE INVENTION The present invention has been made to solve such a conventional problem, and a waveguide flange capable of connecting waveguide flanges and preventing leakage of electromagnetic waves from a joint portion of the waveguide flanges. It is an object of the present invention to provide a connecting device, and more specifically, to solve the above-mentioned problems.

[0011]

In order to achieve the above object, in the connector for a waveguide flange according to the present invention, two waveguide flanges are connected by the following configuration. That is, a connector is formed from a plurality of fitting members having grooves fitted on the side surfaces of a pair of waveguide flanges that are opposed to and in contact with each other, and a radio wave absorber is provided in the grooves. By connecting the fitting members around the periphery, these annular fitting members connect the waveguide flanges and prevent leakage of the electromagnetic wave from the junction of the waveguide flanges.

Therefore, when connecting the waveguides having the flanges to each other, the connection is made by connecting the fitting members, so that the connection can be easily performed, and the connection is made by these annular fitting members. Is performed, the connection can be performed with a sufficient degree of adhesion, and
Since the electromagnetic wave absorber is provided in the groove of each fitting member surrounding the periphery of the flange, it is possible to prevent electromagnetic wave leakage from the joint of the flange. In addition, since the connection tool is separate from the flange without depending on the modification of the flange, for example, the connection tool is inexpensive and has high versatility.

[0013] Incidentally, as a degree of preventing the electromagnetic wave leakage by the radio wave absorber, it is ideally preferable that the electromagnetic wave leakage is zero (or almost zero). However, for example, such an ideal effect cannot be obtained. In any case, it is sufficient that the electromagnetic wave leakage can be reduced to a practically effective degree. The prevention of the electromagnetic wave leakage referred to in the present invention is not limited to the embodiment in which the electromagnetic wave leakage is made zero (or almost zero) as well as the above-described embodiment. As described above, a mode in which electromagnetic wave leakage is reduced to a practically effective degree is also included.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment according to the present invention will be described with reference to the drawings. In this example, a rectangular waveguide 11a,
11b shows a case where flanges 12a and 12b having a rectangular surface are used. FIG. 1 shows an example of an appearance in a state where flanges 12a and 12b of two waveguides 11a and 11b are connected to each other by a connection fitting 1 according to a first embodiment of the present invention. FIG. 2A shows an example of an external appearance when the connection fitting 1 of the present example is perspectively viewed. In addition,
In FIG. 1A, illustration of a radio wave absorber sheet 2 and fingers 3a and 3b, which will be described later, is omitted. FIG.
(A) shows the connection fitting 1 of this example and two waveguides 11a,
11B shows an example of a cross section in a state where the flanges 12a and 12b of the 11b are separated, and FIG. 12B shows a state in which the connection fitting 1 of this example and the flanges 12a and 12b are connected. An example of a cross section is shown.

FIG. 4A shows an example of a cross section of the connection fitting 1 of the present embodiment similar to that shown in FIGS. 3A and 3B. In addition, the cross section of the connection fitting 1 shown in FIG. 3A, FIG. 3B, and FIG. 4A is a cross-sectional view of the connection fitting 1 shown in FIG. It corresponds to a cross section. FIG. 5A shows a configuration example of a coupling portion in a state where the two fitting members 1a and 1b constituting the connection fitting 1 of the present example are separated by releasing the clasp 4. FIG. 2B shows these two fitting members 1.
FIG. 3 shows an example of the configuration of a connecting portion in a state where a and b are fastened by a clasp 4.

As shown in these figures, the connection fitting 1 of the present embodiment comprises two U-shaped fitting members 1a and 1b having the same shape (excluding the clasp 4). I have.
Further, as shown in FIGS. 3A and 3B, for example, each of the fitting members 1a and 1b has a U-shape that is fitted to the side surface of a pair of flanges 12a and 12b that are opposed to and in contact with each other. A mold-shaped groove is provided, and a radio-wave absorber sheet 2 having high spring property is provided in the groove so as to surround the inner periphery.

By connecting the fitting members 1a and 1b around the periphery of the flanges 12a and 12b, the annular fitting members 1a and 1b (that is, the metal fittings 1 in the connected state) are used. It is possible to connect the flanges 12a, 12b of the two waveguides 11a, 11b to each other and to prevent leakage of electromagnetic waves from the joint between the flanges 12a, 12b.

Here, each of the fitting members 1a and 1b of this embodiment is made of a metal material. In addition, as a radio wave absorber having a property of absorbing electromagnetic waves well, for example, a magnetic material such as ferrite or a powder of a metal compound filled in an elastic material such as rubber or synthetic resin is used. Are formed in a sheet shape to form the radio wave absorber sheet 2.
Since the electromagnetic wave transmission attenuation and the frequency characteristics of the electromagnetic wave absorber change depending on, for example, the material and particle size of the filler, the filling rate, the thickness of the sheet, and the like, the electromagnetic wave frequency (the frequency In the case of an example, it is preferable to select an optimum one in consideration of, for example, high frequency.

The above-described radio-absorbent sheet 2 having a high spring property is provided in the groove of each of the fitting members 1a and 1b, and fingers having a high spring property are provided on both side surfaces of the groove. Is provided. The inner dimensions (dimensions excluding the radio wave absorber sheet 2) of the grooves provided in the metal fitting 1 of the present embodiment are the two flanges 12a, 1b.
2b is slightly larger than the outer circumference of the side surface, so that the metal fitting 1 and the two flanges 12a,
Due to the elasticity of the radio wave absorber sheet 2 provided at the portion where the sheet 1 comes in contact with the sheet 12, the two 1, 12 a, 12 b are tightly fixed.

Similarly, the dimension in the width direction (dimension excluding fingers 3a and 3b) in the groove of the metal fitting 1 of this embodiment is the same when both flanges 12a and 12b are joined. 12a and 12b are slightly larger than the thickness in the thickness direction, so that the elasticity of the fingers 3a and 3b provided at the portions where the metal fitting 1 and the flanges 12a and 12b are in contact with each other makes it possible to reduce ,
12a and 12b are closely fixed.

A clasp 4 for connecting the two fitting members 1a and 1b to each other is provided at a joint thereof.
In this example, two clasps 4 provided at two joints are provided.
(In this example, only one of them is shown) so that the two fitting members 1a and 1b can be connected and fixed.

As described above, in the waveguide flange connector 1 of the present embodiment, the flanges 12a,
By having an annular shape that covers the entire outer periphery of the side surface of 2b and having a U-shaped cross-sectional shape that covers the thickness direction when the two flanges 12a and 12b are joined, these two flanges 12a and 12b can be formed. Can be connected and fixed. At the same time, in the waveguide flange connector 1 of the present embodiment, the radio wave absorber sheet 2 that covers the entire outer periphery of the joint between the side surfaces of the two flanges 12a and 12b is provided in the groove that fits on the side surfaces of both flanges 12a and 12b. Therefore, it is possible to prevent electromagnetic waves from leaking from the joint between the flanges 12a and 12b.

In the waveguide flange connector 1 of the present embodiment, the two flanges 12a and 12a opposing and in contact with each other.
b is sandwiched between two fitting members 1a and 1b, and the two flanges 12a and 12b can be connected by fixing the two fitting members 1a and 1b using the clasp 4 or the like. Connection can be easily performed with a sufficient degree of adhesion. Further, in the waveguide flange connector 1 of the present embodiment, the flange 12a,
Since it is a separate connector from a and 12b, for example, it is inexpensive and highly versatile. In addition, since the connector 1 of the waveguide flange of the present embodiment is composed of two fitting members 1a and 1b having the same shape (except for the clasp 4), it is easy to manufacture. Become.

In this example, as shown in FIG. 2A, two fitting members 1a, 1a having a U-shaped outer shape are used.
b, the connector 1 is composed of two L-shaped fitting members 1c and 1d having the same shape (excluding the clasp portion), for example, as shown in FIG. 1 can also be configured. Further, in the present embodiment, as a preferred embodiment, a configuration in which the shapes of the fitting members are the same (excluding the clasp portion) is shown, but a configuration in which the shapes of the fitting members are different may be used. Further, a connection tool including three or more fitting members may be configured.

In this embodiment, the fingers 3 prepared separately from the metal material forming the outer shape of each fitting member 1a, 1b are used.
Although the configuration in which a and 3b are attached to the metal material has been described, for example, when the material of each fitting member has high elasticity, the cross-sectional shape of the connection fitting 21 shown in FIG. By using a configuration in which both side surfaces of the groove are bent so that a part of both sides of the groove protrudes into the groove, as in the cross-sectional shape of the connection fitting 22 shown in FIG. You can also.

In this embodiment, the structure in which the two fitting members 1a and 1b are connected by using the clasp 4 has been described. However, the structure in which the fitting members are connected is not particularly limited, and various structures are available. May be used. As an example, as shown in FIGS. 6A and 6B, hook holes 5a and 5b and metal hooks 6a and 6b are respectively provided at the joint portions of the fitting members 23a and 23b.
Are provided in parallel, and the metal hooks 6a, 6b are passed through the hook holes 5a, 5b and fastened to connect the two fitting members 23a, 23b. In this configuration, the hook holes 5
a and 5b and two fitting members 2 including metal hooks 6a and 6b.
3a and 23b can be shared as the same configuration.

As another example, as shown in FIGS. 7 (a) and 7 (b), magnets having different magnetic poles (N-pole or S-pole) are respectively provided at the joint portions of the fitting members 24a and 24b. It is also possible to use a configuration in which 7a and 7b are provided and the two fitting members 24a and 24b are connected by a magnetic force (attraction) between the magnets 7a and 7b provided in the two fitting members 24a and 24b.
In this configuration, the two fitting members 24a and 24b including the magnets 7a and 7b can be shared as the same configuration. Note that one of the two opposing magnets 7a and 7b may be replaced with a material such as iron that is attracted to the magnets.

As another example, a hinge is provided at one of the two connecting portions when the two fitting members are connected, and an opening / closing mechanism is provided at the other connecting portion. Configurations can also be used. Note that FIG.
7 (a) and FIG. 7 (a) show an example of the configuration of the coupling portion in a state where the two fitting members constituting the connection fitting are separated, and FIG. 6 (b) and FIG. 3 shows an example of the configuration of a connecting portion in a state where these two fitting members are connected.

Next, a second embodiment according to the present invention will be described with reference to FIG. In this example, the rectangular waveguides 41a,
1b shows the case where flanges 42a and 42b having a circular surface are used. FIG. 8 shows two fitting members 31a, 3a constituting a connection fitting according to the second embodiment of the present invention.
In addition to an example of the external appearance of 1b, flanges 42a, 42 of two waveguides 41a, 41b connected by the connection fitting.
An example of the appearance in a state in which b are in contact with each other is shown.

As shown in the figure, when the flanges 42a and 42b having a circular surface are used, the shape of the connection fitting is also made to be cylindrical. In this case, each of the fitting members 31a and 31b has, for example, an outer shape having a semicircular surface and a U-shaped cross section. Although not shown, the metal fitting of the present example is also provided with the entire outer periphery of the side surfaces of the circular flanges 42a and 42b in the U-shaped groove, for example, similarly to the metal fitting 1 shown in the first embodiment. Is provided, and a finger or the like is provided in the groove, and the two fitting members 31a, 3a
A clasp or the like is provided at the joint 1b.

As described above, in the waveguide flange connector of the present embodiment, when connecting the waveguides 41a and 41b having the circular flanges 42a and 42b to each other, the connector shown in the first embodiment is used. Similarly, the annular fitting members 31a, 31
b (that is, the connecting tool in a connected state) to connect the flanges 42a and 42b to each other and
Electromagnetic wave leakage from the joint between 2a and 42b can be prevented.

The structure of the connector for the waveguide flange according to the present invention is not necessarily limited to the one described above, and various structures may be used. For example, various shapes may be used as the shape of the connector, the shape of the groove, the material and shape of the radio wave absorber, and the shape of the waveguide, the shape of the flange, and the like. Various things may be used.

[0033]

As described above, according to the waveguide flange connector of the present invention, the groove has a groove fitted on the side surface of a pair of waveguide flanges which are opposed to each other and is in the groove. Since the connector is constituted by a plurality of fitting members provided with the absorbers and the fitting members are connected so as to surround the periphery of the waveguide flange, the waveguide flanges are connected to each other by these annular fitting members. And prevents leakage of electromagnetic waves from the junction of the waveguide flanges.

[Brief description of the drawings]

FIG. 1 is a diagram showing an example of an appearance in a state where two waveguide flanges are connected by a connection fitting according to a first embodiment of the present invention.

FIG. 2 is a diagram showing an example of a perspective appearance of a connection fitting according to a first embodiment of the present invention.

FIG. 3 is a diagram showing an example of a cross section of the connection fitting according to the first embodiment of the present invention.

FIG. 4 is a diagram showing a cross-sectional example of a connection fitting from which fingers are omitted.

FIG. 5 is a diagram illustrating a configuration example of a connecting portion of a connection fitting.

FIG. 6 is a diagram illustrating a configuration example of a coupling portion of a connection fitting.

FIG. 7 is a diagram illustrating a configuration example of a connecting portion of a connection fitting.

FIG. 8 is a view showing an example of an appearance of a connection fitting according to a second embodiment of the present invention.

FIG. 9 is a diagram for explaining connection of a flange according to a conventional example.

[Explanation of symbols]

1, 21, 22 ... connecting fittings, 1a, 1b, 1c, 1d, 2
3a, 23b, 24a, 24b, 31a, 31b, fitting member, 2, radio wave absorber sheet, 3a, 3b, finger, 4, clasp, 5a, 5b, hook hole, 6a, 6b
・ Metal hook, 7a, 7b ・ ・ Magnet, 11a, 11b, 41
a, 41b... waveguide, 12a, 12b, 42a, 42b.
Flange,

Claims (1)

[Claims] 1. A waveguide flange connecting device for connecting two waveguide flanges, comprising a groove fitted on a side surface of a pair of waveguide flanges opposed to each other and in contact with each other, and a radio wave absorber in the groove. Is provided, and by connecting the respective fitting members around the periphery of the waveguide flange, the annular flanges connect the waveguide flanges together with the waveguide flange. A connector for a waveguide flange, wherein electromagnetic wave leakage from a joint portion of the flange is prevented.