JPH0523602U - Nut holder - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a nut holder that can easily perform the work when connecting waveguides using a male screw and a nut without using a holding tool, and that does not lose the nut. .. [Structure] A housing portion 23 that holds the nut 22 in a floating state while preventing the rotation of the nut 22, and a male screw inserted into a through hole 30 of a waveguide flange 28 by fitting the waveguide portion 25. 35
And a groove portion 26 for positioning the nut 22 at a position where the nut 22 can be screwed in.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a nut holder that holds a nut used when connecting waveguides with a screw and a nut.

[0002]

[Prior Art]

 In the high frequency circuit of the communication device in the quasi-millimeter wave band, the circuit is constructed by using a waveguide in order to reduce electric loss. Further, flanges for connection are provided at both ends of the waveguide, and when connecting the waveguides, it is common to align the flanges with each other and screw both flanges together.

FIG. 6 shows a conventional waveguide connecting structure of this type. Flanges 4 and 5 are provided at the ends of the waveguides 1 and 2, respectively, and through holes 9 and 10 for inserting male screws 7 are provided at the four corners of the flanges 4 and 5, respectively. Has been done. The waveguides 1 and 2 are connected by fitting the flanges 4 and 5 together, inserting the screw 7 into the through holes 9 and 10, and screwing the male screw 7 into the nut 12.

However, according to this conventional connection structure, when performing the screw tightening work, it is necessary to hold the nut 12 with a tool such as a spanner, which makes the work complicated, and the connection work is performed in a narrow space. In some cases, it was not possible to use a tool to hold the nut 12. In addition, the nut 12 and washers 13, 14 could fall and be lost during screw tightening work.

In order to solve this problem, as shown in FIG. 7, the through hole formed in one of the flanges 4 is used as a screw hole 16, and the male screw 7 inserted into the through hole 10 of the flange 5 is used in this screw hole 16. A connection structure in which the flanges 4 and 5 are screwed in and fastened can be considered. However, with this structure, if the hole positions of the through hole 10 and the screw hole 16 are slightly misaligned, or if the flanges 4 and 5 are inclined, it is difficult to tighten the male screw 7, and As a matter of fact, if the screws 7 are tightened, the thread of the screw hole 16 may be damaged, or the two waveguides 1 and 2 may be connected in a displaced state.

[0006]

[Problems to be solved by the device]

 As described above, in the connection structure shown in FIG. 6, it is necessary to press the nut with a tool to perform the screw tightening work, which not only complicates the work, but also cannot perform the connection work in a space where the tool cannot be inserted. There was a problem. In addition, the nut was sometimes dropped and lost during the work.

Further, in the connection structure shown in FIG. 7, if there is a slight deviation between the screw hole and the through hole, not only is it difficult to fasten with a male screw, but if it is forcibly tightened, the thread of the screw hole There is a problem in that the waveguide is damaged or both waveguides are connected in a displaced state. The present invention has been made in view of such conventional drawbacks.When connecting waveguides with male screws and nuts, the work can be easily performed without using a holding tool, and the nuts can be dropped. The purpose is to provide a nut holder that will not be lost.

[0008]

[Means for Solving the Problems]

 The present invention is a nut holder that holds a nut that is screwed into the end of a male screw inserted in a through hole formed in a flange of a waveguide, and in which the nut is stored and the male screw described above is screwed. A housing portion for preventing rotation of the nut caused by being screwed into contact with a wall surface, and a groove portion for fitting the waveguide and positioning the housing portion at a position where the male screw can be screwed into the nut. And a gap in which the nut into which the male screw is screwed can be moved following the male screw is provided between the wall surface of the housing portion and the nut.

[0009]

[Action]

 In the nut holder of the present invention, when the groove portion and the waveguide are fitted, the nut stored in the storage portion is positioned so that the male screw inserted in the through hole of the waveguide flange can be screwed in. Be done. In addition, since the nut is held in the storage portion in a floating manner, the male screw can be smoothly screwed into the nut even if there is a slight displacement between the male screw and the nut.

[0010]

【Example】

 Hereinafter, an embodiment of the present invention will be described in detail with reference to FIGS.

FIG. 1 is an exploded perspective view of a waveguide connection structure having a nut holder according to the present invention, FIG. 2 is an exploded perspective view of the nut holder, and FIG. 3 (a) is a metal fitting constituting the nut holder. 3 is a front view, FIG. 3 (b) is a sectional view taken along line YY of FIG. 3 (a), FIG. 4 is a sectional view taken along arrow X of FIG. 1, and FIG. 5 is a sectional view taken along line ZZ of FIG.

In the nut holder 21 according to the present invention, storage portions 23 for storing the nut 22 are provided at the four corners, and a groove portion 26 that fits with the waveguide 25 is provided. Then, at a position close to the flange 28 provided at the end of the waveguide 25, the groove 26 is fitted into the waveguide 25, and the nut holder 21 is attached. Each of the stored nuts 22 is positioned so as to face the through holes 30 formed at the four corners of the flange 28, respectively. Therefore, the flange 33 provided at the end of the waveguide 31 connected to the waveguide 25 is brought into contact with the flange 28, and the through hole (not shown) formed in the flange 33 is changed to the through hole 30. By inserting the male screw 35 and the male screw 35, the screw 35 can be easily screwed into the nut 22 positioned so as to face the through hole 30. In this case, the rotation of the nut 22 is blocked by the claw portion (wall surface) 37 of the storage portion 23 that abuts the nut 22, so that the screw 35 can be screwed onto the nut 22 without pressing the nut 22 with a tool. Can be crowded. In addition, since a slight gap is provided between the nut 22 and the storage section 23 and the nut 23 is held in the storage section 23 in a floating manner, there is no slight position between the male screw 35 and the nut 22. Even if this occurs, when the screw 35 is screwed into the nut 22, the nut 22 moves slightly following the male screw 35, so the male screw 35 is screwed into the nut 22 without difficulty. Next, the configuration of each part of the nut holder 21 will be described. As shown in FIG. 2, the nut holder 21 is formed by combining two metal fittings 39, 39 having the same shape. As shown in FIG. 3, the metal fitting 39 is formed in a substantially "U" shape so that the groove portion 26 that fits into the above-mentioned waveguide 25 is formed.

Further, square holes 41 are formed at four corners of the metal fitting 39 so as to correspond to the through holes 30 of the flange 28. The square hole 41 has a size into which the threaded portion of the male screw 35 can be inserted, but the width of the square hole 41 is narrower than the width of the nut 22. Further, at the upper edge portion of the square hole 41, the above-mentioned claw portion 37 is erected substantially vertically on the side of the predetermined surface 39a of the metal fitting 39.

On the other hand, on the upper edge of the metal fitting 39, a protrusion 43 is provided in the central portion thereof, and on both sides of the protrusion 43, protrusion receivers 46 having square holes 45 are provided. As shown in FIG. 3 (b), the protrusion receiver 46 is provided so as to be inclined and inclined toward the predetermined surface 39a by bending the upper edge side of the metal fitting 39 by about 60 degrees. Further, a protrusion 48 having a square hole 45 is provided at the center of the lower edge of the metal fitting 39, and protrusions 49 are provided on both sides of the protrusion receiver 48. As shown in FIG. 3 (b), the projection receiver 48 is provided so as to be inclined toward the predetermined surface 39a by bending the lower edge side of the metal fitting 39 by about 60 degrees.

The nut holder 21 using the metal fitting 39 is produced as shown in FIG. That is, the pair of metal fittings 39, 39 are turned upside down and face each other with the predetermined surface 39a inside. Further, the nuts 22 are positioned in the square holes 41 at the four corners of the metal fitting 39 between the pair of metal fittings 39. Then, in this state, the two metal fittings 39, 39 are brought close to each other, and the projections 49, 49, 43 of the one metal fitting 39 are brought into the square holes 45 of the projection receivers 46, 46, 48 of the other metal fitting 39, and the other metal fitting 39 is The protrusions 43, 49, 49 are inserted into the square holes 45 of the protrusion receivers 48, 46, 46 of the one metal fitting 39. This forms the nut holder 21. Then, as shown in FIGS. 4 and 5, the storage portions 23 described above are formed by the predetermined surfaces 39a and the claw portions 37 of the metal fittings 39, and the respective nuts 22 have the storage portions 23 formed at the four corners of the nut holder 21. It has been stored in the. In this case, gaps s and t are provided between the nut 22 and the claw portion 37 and between the nut 22 and the predetermined surface 39a. Therefore, the nut 22 is floatingly accommodated in the storage portion 23, and the nut 22 into which the male screw 35 inserted into the storage portion 23 from the square hole 41 is screwed in follows the male screw 35. And moves in the range of the clearances s and t. Therefore, as described above, in the state where the nut holder 21 is attached to the waveguide 25, even if there is a slight displacement between the male screw 35 and the nut 22, the male screw 35 can be smoothly attached to the nut 22. Can be screwed in.

In this example, the nut holder 21 formed of the two metal fittings 39, 39 having the same shape is described, but this is because the nut holder 21 is easily manufactured. The configuration of is not limited to this example.

[0017]

[Effect of the device]

 As described above, the nut holder of the present invention holds the nut in a floating state with the rotation of the nut prevented, and when the nut holder is attached to the waveguide, the through hole of the waveguide flange is formed. Since the nut can be positioned so that the male screw inserted in the can be screwed in, the work of connecting the waveguides using the male screw and the nut can be easily performed without using a holding tool. In addition, the nut will not be dropped and lost during the work.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a waveguide connection structure using a nut holder according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view of the nut holder shown in FIG.

3A and 3B are views for explaining a metal fitting constituting a nut holder according to an embodiment of the present invention, in which FIG. 3A is a front view and FIG.
YY line sectional drawing.

FIG. 4 is a view on arrow X in FIG.

5 is a cross-sectional view taken along line ZZ of FIG.

FIG. 6 is an exploded perspective view of a conventional waveguide connection structure.

FIG. 7 is an exploded perspective view of another conventional waveguide connection structure.

[Explanation of symbols]

 21 ... Nut holder 22 ... Nut 23 ... Storage section 25 ... Waveguide 26 ... Groove section 28 ... Flange 30 ... Through hole 35 ... Male thread

Claims (1)

[Scope of utility model registration request] 1. A nut holder for holding a nut screwed with a tip of a male screw inserted into a through hole formed in a flange of a waveguide, wherein the nut is housed and the male screw is An accommodating portion for preventing the rotation of the nut caused by being screwed into contact with a wall surface, and a fitting portion for positioning the accommodating portion at a position where the male screw can be screwed into the nut by being fitted with the waveguide. A groove portion, and a gap is provided between a wall surface of the housing portion and the nut, in which the nut into which the male screw is screwed can be moved following the male screw. Nut holder to be used.