JP2003189437A - Cable trough, clamp thereof and clamping method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cable trough and a clamp thereof, capable of attaining a minimum installation space, continuous production by extrusion molding, a large allowable range of a deviation of an installation position of a supporting arm, and no risk of damaging a cable. <P>SOLUTION: In this cable trough constituted of a trough body 12 having uniform cross sections in the longitudinal direction and a lid 14, a T-shaped groove 34 which continues in the longitudinal direction and has a transverse groove 34b larger in the width than a longitudinal groove 34a at the deep position of the longitudinal groove 34a. This clamp 36 consists of a bolt 38, a nut 40, and a clamping ring 42 mounted on the head of the bolt so as not to rotate. The clamping ring 42 includes overhanging pieces 42c on both sides of the bolt 38, which goes into the T-shaped transverse grooves 34b formed on the bottom surfaces of the trough body 12 and press against the trough body 12. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a cable trough used for laying a power cable or a communication cable, a fixing metal fitting suitable for fixing it to a support, and a fixing method.

[0002]

2. Description of the Related Art When laying a cable along a railway line, a concrete trough is generally used to protect the cable. Concrete troughs are usually installed above ground. However, in areas where new troughs are to be installed, such as in overcrowded areas in urban areas, support arms made of shaped steel are attached to retaining walls such as concrete walls and stone walls, and concrete troughs and lightweight resin troughs are mounted on top of them. Has been installed.

FIG. 12 shows an example thereof. In the figure,
Reference numeral 10 denotes a resin trough, which forms a cable storage space with a lower trough body 12 and a lid 14 placed thereon (Japanese Utility Model Publication No. 6-85984). The trough body 12
It is placed on a support arm 16 that is attached to the retaining wall at appropriate intervals, and both sides of it are fixed with a fixing bracket 18, a bolt 20, and a nut 22.
It is fixed to the support arm 16 by. The lid 14 is attached to the trough body 12 by engaging elastic locking pieces 24 formed on both side edges of the lid 14 with jaws 26 formed on both side edges of the trough body 12. .

The resin trough has an advantage that it is lighter in weight than the concrete trough and can be easily installed. In addition, both the trough body and the lid have a uniform cross section in the longitudinal direction. Therefore, since they can be manufactured simply by extrusion molding and cutting them to a specified length, they have excellent productivity. There is also.

[0005]

However, in the cable trough as described above, the trough body is fixed to the support arm on both sides, so that the installation space in the direction of the support arm becomes large (length of the support arm). Will be longer).

As a cable trough having a small installation space in the support arm direction, a trough as shown in FIG. 13 is known. This trough 10 is located at the bottom 28 of the trough body 12.
The recesses 30 are formed at predetermined intervals in the longitudinal direction, and the bolt holes 32 are formed in the recesses 30. The trough 10 is mounted on the support arm 16 by placing the trough body 12 on the support arm 16, inserting the bolt 20 into the bolt hole 32 of the trough body 12 and the bolt hole of the support arm 16, and tightening the nut 22. It is supposed to be fixed.

However, the trough shown in FIG. 12 cannot be continuously produced by extrusion molding because the trough body has a non-uniform longitudinal cross-sectional shape (the recesses 30 and the bolt holes 32 are formed at predetermined intervals). However, there is a problem in that the production cost becomes high because it is a single item production by die molding. Further, since the bolt holes 32 of the trough body 12 and the bolt holes of the support arm 16 need to be aligned with each other, the installation position of the support arm 16 must be set quite accurately, which makes the construction troublesome. Although the bolt hole 32 is a long hole that is long in the longitudinal direction of the trough, the displacement of the installation position of the support arm that can be absorbed by this long hole is slight. Furthermore, since a recess for accommodating the bolt head is formed on the inner bottom surface of the trough body, the recess may damage the cable.

In view of the above problems, the object of the present invention is that the installation space is small, continuous production by extrusion molding is possible, the allowable range of displacement of the installation position of the support is large, and the cable is damaged. It is an object of the present invention to provide a fearless cable trough, a fixing metal fitting and a fixing method thereof.

[0009]

Means for Solving the Problems To achieve this object, the present invention relates to a cable trough including a trough body having a uniform cross-sectional shape in the longitudinal direction and a lid body covering the trough body, and a bottom surface of the trough body. , Which has a lateral groove portion wider in width than the longitudinal groove portion continuously in the longitudinal direction.
It is characterized in that a character-shaped groove is formed.

The fixing metal fitting of the present invention for fixing the cable trough to the support body includes a bolt, a nut, and a metal fitting attached to the head of the bolt so as not to rotate relative to each other. Is characterized by having, on both sides of the head of the bolt, overhanging pieces that enter the lateral groove portions of the T-shaped groove formed on the bottom surface of the trough body and press the trough body.

In the fixing fitting of the present invention, when the fastening fitting is rotated about the axis of the bolt, depending on the rotation angle, the fitting fits within the width of the vertical groove of the trough body and exceeds the width of the horizontal groove. It is preferable that the shape has a certain time.

In the fixing metal fitting of the present invention, the size of the overhanging piece of the overhanging piece in the protruding direction is set to be larger than the groove width of the vertical groove portion of the T-shaped groove and equal to or smaller than the groove width of the horizontal groove portion, and The dimension in the direction orthogonal to the overhang direction is T
It is set to be smaller than the groove width of the longitudinal groove portion of the V-shaped groove, and the overhanging piece is inserted into the T-shaped groove with the fastening metal fittings with the overhanging direction of the overhanging piece oriented in the longitudinal direction of the T-shaped groove. Although it does not prevent rotation of the nut in the tightening direction by approximately 90 °, it is preferable that the nut has an outer end edge that abuts the inner wall of the lateral groove portion and prevents rotation when further rotation is attempted.

In the fixing metal fitting of the present invention, the overhanging piece of the fastener is divided into four quadrants when the plane perpendicular to the axis of the bolt is divided into four quadrants by the orthogonal coordinate axes with the axis as the center. The outer edge is formed so as to be orthogonal to one coordinate axis in front of the direction in which the nut is tightened, and the part that enters into every other quadrant of the fastener is that the fastener is inside the T-shaped groove. More preferably, it is formed to have an outer edge that does not hinder the rotation when rotating in the tightening direction.

In the fixing fitting of the present invention, the projecting piece of the fastening fitting is formed so as to be continuous with the quadrant adjacent to the quadrant adjacent to the front in the nut tightening direction from the quadrant adjacent to the quadrant. The overhanging piece has an arcuate outer edge whose radius is the distance from the axis of the bolt to the outer edge of the overhanging piece formed in every other quadrant, or an outer edge located inside thereof. Is more preferable.

In the fixing method of the present invention for fixing the cable trough to the support, the bolts of the fixing metal fitting configured as described above are attached to the bolt holes of the support arranged at appropriate intervals so that the fastener is mounted. And then mounting the trough main body of the cable trough according to claim 1 on the support, and inserting the fastener of the fixing bracket into the T-shaped groove on the bottom surface of the trough main body, Thereafter, the bolt is rotated in the direction of tightening the nut to put the overhanging piece of the fastener into the lateral groove portion of the T-shaped groove, and the nut is tightened to fix the cable trough to the support. .

[0016]

Embodiments of the present invention will be described below.
A detailed description will be given with reference to the drawings.

First Embodiment FIG. 1 shows an embodiment of the cable trough according to the present invention. This cable trough 10
Is a trough body 12 having a uniform cross-sectional shape in the longitudinal direction.
And the lid 14 that covers the trough body 12
A T-shaped groove 34 having a lateral groove portion 34b wider than the longitudinal groove portion 34a is formed continuously in the longitudinal direction on the bottom surface of the. The T-shaped groove 34 is for fixing the trough body 12 to the support arm. Since both the trough body 12 and the lid 14 have a uniform cross-sectional shape in the longitudinal direction, the cable trough 10 can be continuously manufactured by resin extrusion molding.

FIG. 2 illustrates one embodiment of a fastener according to the present invention for securing the cable trough 10 of FIG. 1 to a support arm. This fixing bracket 36 includes a bolt 38 and a nut 40.
And a fastener 42 and a washer 44.
The fastener 42 includes a rectangular bottom plate portion 42a through which the bolt 38 penetrates the central portion, and a wall portion 42b that rises from both sides of the bottom plate portion 42.
And an overhanging piece 42c protruding outward from the upper end of the wall portion 42b
And are integrally formed. The head of the bolt 38 is housed in a recess formed by the bottom plate 42a and the wall 42b. The fastener 42 is fixed to the head of the bolt 38 by welding or the like so as not to rotate relatively.

The dimension P of the fastener 42 in the overhanging direction of the overhanging piece 42c (the dimension between the outer edge 42d of the overhanging piece 42c) is
Vertical groove 34a of T-shaped groove 34 in the cable trough of FIG.
The groove width V is set to be slightly larger than the groove width V of the lateral groove portion 34b and the groove width W is set to be slightly smaller than the groove width W of the lateral groove portion 34b. The dimension Q of the fastener 42 in the direction orthogonal to the projecting direction of the projecting piece 42c is arbitrary, but in this example, Q> P. The wall 42b of the fastener 42
The dimension R between the outer surfaces is set to be slightly smaller than the groove width V of the vertical groove portion 34a. Therefore, the fastener 42 can be inserted into the T-shaped groove 34 from one end side of the trough body 12. When the fastener 42 is inserted into the T-shaped groove 34, the bottom plate portion 42a and the wall portion 42b enter the vertical groove portion 34a, and the overhanging piece 42c is inserted into the horizontal groove portion 34b.
to go into. The fastener 42 inserted in the T-shaped groove 34 is slidable in the longitudinal direction of the trough body 12.

FIGS. 3 and 4 show the cable trough of FIG.
10 shows a state in which 10 is fixed to the support arm 16 using the fixing fitting 36 of FIG. The support arms 10 are fixed to a retaining wall or the like at appropriate intervals shorter than half the unit length of the cable trough 10. The method of fixing the cable trough 10 to the support arm 16 is as follows. First, the support arm for the trough body 12
Placed on 16 and T-shaped groove from one or both ends of the trough body 12
The fastener 42 of the fixture 36 is inserted into 34, and the fixture 36 is slid to the vicinity of the support arm 16. Next, the nut 40 and the washer 44 of the fixing metal fitting 36 are removed (may be removed beforehand), the trough body 12 is slightly lifted, and the bolt 38 is inserted into the bolt hole of the support arm 16. Then, after adjusting the longitudinal position of the trough body 12, the washer 44 is fitted to the bolt 38 and the nut 40 is tightened. As a result, the overhanging piece 42c of the fastener 42 presses the lower surface side of the lateral groove 34b, so that the trough body 12 is firmly fixed to the support arm 16.

In this fixing method, since the fixing fitting 36 can slide in the longitudinal direction of the trough body 12, the trough body can be fixed without any problem even if the installation position of the support arm is slightly displaced. Therefore, the installation work of the support arm is easy. Further, since the cable trough is fixed and there is nothing protruding on both sides of the cable trough 10, the installation space is small, and the length of the support arm 16 can be significantly shortened as compared with the case of FIG. Further, since it is not necessary to rotate the hand to the back side (retaining wall side) of the cable trough 10, the nut tightening work can be performed easily and surely. Furthermore, since the inner surface of the trough body 12 is a smooth surface with no unevenness, there is no risk of damaging the cable.

Embodiment 2 FIG. 5 shows another embodiment of the fixing metal fitting according to the present invention for fixing the cable trough 10 of FIG. 1 to the support arm. The fixing metal fitting 36 also includes a bolt 38, a nut 40, a fastener 42, and a washer 44, but the structure of the fastener 42 is different from that of FIG.

In this fastener 42, the dimension P of the overhanging piece 42c in the overhanging direction is larger than the groove width V of the vertical groove 34a of the T-shaped groove 34 formed in the trough body 12 of FIG. 1 and the groove width of the lateral groove 34b. It is set to be slightly smaller than W, and the dimension Q in the direction orthogonal to the overhang direction is set to be slightly smaller than the groove width V of the vertical groove portion 34a. Also, this fastener 42
As shown in FIG. 5 (A), when a plane orthogonal to the central axis of the bolt 38 is divided into four quadrants by orthogonal coordinate axes x and y centered on the central axis, every other quadrant (shown in the figure). In the example, the bottom plate portion 42a, the wall portion 42b, and the overhanging piece 42c are formed in the second quadrant and the fourth quadrant, and every other quadrant (first
Only the bottom plate portion 42a is formed in the quadrant and the third quadrant. The overhanging piece 42c is formed so that the outer end edge 42d is orthogonal to the coordinate axis x in front of the direction in which the nut is tightened (counterclockwise when viewed from above). The outer edge of the bottom plate portion 42a in the first quadrant and the third quadrant is formed in an arc shape having a radius from the central axis of the bolt 38 to the wall portion 42b. This is to prevent rotation when the fastener is rotated in the T-shaped groove in the direction in which the nut is tightened.

When the fastener 42 is configured as described above, the fastener is approximately 90 in the direction in which the nut is tightened in the T-shaped groove.
Since it can be rotated, the trough body can be easily fixed to the support arm by the following method. First, remove the nut 40 of the fixing bracket (the washer is not described),
With the bolt 42 up, the bolts 38 are inserted through the bolt holes of the support, which are installed at appropriate intervals. Next, the fastener 42 is placed on the support arm in a state in which the extension direction (x-axis direction) of the extension piece 42c is oriented in the direction orthogonal to the support arm (trough longitudinal direction), as shown in FIG. (Same as Figure 1)
To place. Since the dimension Q of the fastener 42 in the direction (y-axis direction) perpendicular to the protruding direction of the fastener is slightly smaller than the width V of the vertical groove 34a of the T-shaped groove 34, the fastener 42 is set as described above. Once placed, the trough body on the support arm
The fastener 42 can be inserted into the T-shaped groove 34 when the 12 is placed.

A state in which the fastener 42 is inserted into the T-shaped groove 34 is viewed along the line BB in FIG. 6A, which is as shown in FIG. 6B. In this state, the overhanging piece 42c has a T-shaped groove.
It is almost at the same height as the lateral groove 34b of 34 (slightly lower by the tightening margin). After that, when the bolt 38 is rotated approximately 90 ° in the direction of tightening the nut (direction of arrow K), the same figure (B) is obtained.
As shown in B, the overhanging piece 42c of the fastener 42 (fixed to the head of the bolt 38) is the lateral groove 34b of the T-shaped groove 34.
Then, the fastener 42 tries to exceed the width of the lateral groove portion 34b, but the outer edge 42d of the overhanging piece 42c hits the inner wall of the lateral groove portion 34b and cannot rotate any more. Therefore, by tightening the nut 40 in this state, the trough body 12 can be fixed to the support arm. In this fixing method, since the trough body can be placed after the fixing metal fitting 36 is attached to the support arm, the installation work of the trough body is easier than the case where the fixing metal fitting of FIG. 2 is used.

[Third Embodiment] FIG. 7 shows still another embodiment of a fixing member according to the present invention for fixing the cable trough 10 of FIG. 1 to a support arm. This fixing bracket 36
5 is based on almost the same idea as the fixing metal fitting of FIG. 5, but is different from the fixing metal fitting of FIG.
42b and the overhanging piece 42c are also formed in the first quadrant and the third quadrant. The wall portion 42b of the first quadrant and the overhanging piece 42c are connected to the wall portion of the third quadrant so as to be continuous from the second quadrant.
42b and the overhanging piece 42c are continuous from the fourth quadrant,
In other words, it is formed so as to be continuous with the adjacent quadrant in front of the direction in which the nut is tightened.

However, the wall portion 42b of the first quadrant and the third quadrant
Also, the overhanging piece 42c has a fastener 42 of approximately 90 ° in the T-shaped groove.
It is formed so as not to block rotation. That is, the wall portion 42b of the first and third quadrants has a distance from the axis of the bolt 38 to the outer surface of the wall portion 42b formed in the second and fourth quadrants (in other words, half of the groove width V). It has a circular arc-shaped outer surface having a radius equal to or slightly smaller than 1. Further, the overhanging pieces 42c of the first and third quadrants have a distance from the axis of the bolt 38 to the outer end edge 42d of the overhanging pieces 42c formed in the second and fourth quadrants (in other words, the groove width W of 2 Arc-shaped outer edge 42 with radius equal to or slightly smaller than 1/42
e is formed.

Since the configuration other than the above is the same as that of the fixing fitting of FIG. 5, the same parts are denoted by the same reference numerals and the description thereof will be omitted.

FIG. 8 shows the trough body 12 with the fixing bracket 36 of FIG.
FIG. 9 is an explanatory view of a method of fixing the to the support arm, and corresponds to FIG. 6 of the second embodiment. Even if the fixing bracket 36 of FIG. 7 is used, the trough body can be fixed to the support arm in exactly the same manner as when the fixing bracket of FIG. 5 is used. The advantage of using the fixing bracket 36 of FIG. 7 is that the area for pressing the lower side of the lateral groove portion 34b with the overhanging piece 42c is larger than that of the fixing bracket of FIG. 5 as shown in FIG. 8B. , The trough body can be fixed more firmly.

The overhanging pieces 42 in the first and third quadrants
The outer edge of c may be formed so as to be located inside the arc-shaped outer edge 42e. The outer surfaces of the wall portions 42b in the second and fourth quadrants may be formed so as to be located inside the outer surface of the arc shape.

[Fourth Embodiment] FIG. 9 shows still another embodiment of a fixing member according to the present invention for fixing the cable trough 10 of FIG. 1 to a support arm. This fixing bracket 36
Is a plate-like fastener 42 fixed to the upper end surface of the bolt 38 by welding. The plan view of the fastener 42 is shown in FIG.
It is the same as the planar outer shape of the fastener 42 shown in FIG. Since the configuration other than the above is the same as that of the fixing metal fitting of FIG. 7, the same portions are denoted by the same reference numerals and the description thereof will be omitted. Even with such a structure, the trough body can be fixed to the support arm in the same manner as the fastener of FIG. The advantage of the fixing bracket 36 of FIG. 9 is that the cost is low because the fastener 42 is flat.

Embodiment 5 FIG. 10 shows another embodiment of the cable trough according to the present invention. This cable trough 10 is different from the cable trough shown in FIG. 1 in that the upper portions of both side walls of the vertical groove portion 34a of the T-shaped groove 34 are inclined surfaces S in which the groove width becomes wider as it goes upward. is there. If such an inclined surface S is formed, when the fastener 42 of FIG. 5, 7 or 9 is inserted into the T-shaped groove 34 and rotated in the direction of tightening the nut, Since the fastener 42 slides up due to the inclined surface S, it can be rotated more reliably. In particular, the cable trough 10 having this inclined surface S
And a fastener 42 of the type of FIG. 7 or FIG. 9 is effective in securely rotating the fastener 42 and securely fixing the trough body 12.

Sixth Embodiment FIG. 11 shows still another embodiment of the cable trough according to the present invention. In this cable trough 10, elastic locking pieces 24 are formed on both side edges of the lid body 14, and jaw portions 26 are formed on both side edges of the trough body 12, so that the elastic locking pieces 24 are engaged with the jaw portions 26. By doing so, the trough body 12
And the lid 14 are connected. The configuration of the cable trough other than the above and the method of fixing it to the support arm 16 are the same as in FIG.

[0034]

As described above, since the cable trough according to the present invention can be fixed to the support at the T-shaped groove portion formed on the bottom surface of the trough body, the installation space is small and the cross section is small. Since the shape is uniform in the longitudinal direction, continuous production by extrusion molding is possible. Furthermore, since the mounting position of the fixing bracket is not restricted, there is a large allowable range of deviation of the mounting position of the support, and since there is no recess on the inner surface of the trough body, there is no risk of damaging the cable.
There is an advantage. Further, by using the fixing metal fitting and the fixing method according to the present invention, the cable trough can be easily fixed to the support, and the cable trough laying work can be efficiently performed.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of a cable trough according to the present invention.

FIG. 2 shows an embodiment of a fixture according to the present invention,
(A) is a plan view, (B) is a front view, and (C) is a side view.

3 is a front view showing a state in which the cable trough of FIG. 1 is fixed to a support body by the fixing metal fitting of FIG.

4 is a cross-sectional view taken along the line AA of FIG.

5A and 5B show another embodiment of the fixing metal fitting according to the present invention, FIG. 5A is a plan view, FIG. 5B is a front view, and FIG.

6A is a cross-sectional view of the cable trough, and FIG. 6B is a cross-sectional view taken along the line BB of FIG. Fig.

7A and 7B show another embodiment of the fixing metal fitting according to the present invention, FIG. 7A is a plan view, FIG. 7B is a front view, and FIG.

8A and 8B are sectional views of the cable trough, and FIG. 8B is a cross-sectional view taken along the line BB of FIG. Fig.

9A and 9B show still another embodiment of a fixture according to the present invention, FIG. 9A is a plan view, FIG. 9B is a front view, and FIG. 9C is a side view.

FIG. 10 is a cross-sectional view showing another embodiment of the cable trough according to the present invention.

FIG. 11 is a sectional view showing still another embodiment of the cable trough according to the present invention.

FIG. 12 is a front view showing an example of a structure for fixing a conventional cable trough to a support body.

13A and 13B show another example of a conventional structure for fixing a cable trough to a support, FIG. 13A is a front view, and FIG. 13B is a plan view with a lid removed.

[Explanation of symbols]

10: Cable trough 12: Trough body 14: Lid 16: Support arm 34: T-shaped groove 34a: Vertical groove 34b: Lateral groove 36: Fixing bracket 38: Bolt 40: Nut 42: Fastener 42a: bottom plate 42b: wall 42c: Overhanging piece 42d: outer edge

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[Procedure amendment]

[Submission date] December 21, 2001 (2001.12.
21)

[Procedure Amendment 1]

[Document name to be corrected] Drawing

[Correction target item name] All drawings

[Correction method] Change

[Correction content]

[Figure 1]

[Fig. 2]

[Figure 3]

[Figure 4]

[Figure 5]

[Figure 10]

[Figure 6]

[Figure 7]

[Figure 8]

FIG. 11

[Figure 9]

[Fig. 12]

[Fig. 13]

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Kazuya Imamatsu             2-6-1, Marunouchi, Chiyoda-ku, Tokyo             Kawa Electric Industry Co., Ltd. F-term (reference) 5G369 AA19 BA03 DB01

Claims (7)

[Claims] 1. A cable trough comprising a trough body (12) having a uniform cross-sectional shape in the longitudinal direction and a lid body (14) covering the trough body (12), wherein the bottom surface of the trough body (14) has a longitudinal direction. A T-shaped groove (34) continuously having a lateral groove portion (34b) wider than the groove in the longitudinal groove portion (34a).
A cable trough characterized by having formed. 2. A fixing fitting for fixing the cable trough according to claim 1 to a support, which comprises a bolt (38),
A nut (40) and a fastener (42) attached to the head of the bolt so as not to rotate, the fastener (42) is provided on both sides of the head of the bolt (38) and the trough body. A cable trough fixing metal fitting having a protruding piece (42c) that presses the trough body (12) by entering a lateral groove portion (34b) of a T-shaped groove formed on the bottom surface of the cable trough. 3. The fixing metal fitting according to claim 2, wherein the fastening metal fitting (42) as a whole has a vertical groove portion of the trough body depending on a rotation angle when rotated around an axis of the bolt (38). When it fits within the width of (34a) and the lateral groove (34b)
Fixing metal fittings for cable troughs, which have a shape that sometimes exceeds the width of. 4. The fixing fitting according to claim 2, wherein the fastening fitting (42) has a groove (34a) of a vertical groove portion (34a) having a T-shaped groove having a dimension (P) in the protruding direction of the protruding piece (42c). It is set to be larger than the width (V) and smaller than or equal to the groove width (W) of the lateral groove portion (34b), and the dimension (Q) in the direction orthogonal to the overhang direction is the vertical groove portion (42a) of the T-shaped groove. Is set to be smaller than the groove width (V) of the T-shaped groove (34) in the protruding piece (42c) so that the protruding direction of the protruding piece (42c) extends in the longitudinal direction of the T-shaped groove (34). It does not prevent the nut (40) from rotating in the T-shaped groove in the tightening direction by about 90 °, but if it is rotated further, it will hit the inner wall of the lateral groove (34b) and prevent rotation. A cable trough fixing metal fitting having an edge (42d). 5. The fixing metal fitting according to claim 4, wherein the overhanging piece (42c) of the fastener is a rectangular coordinate axis (x, y) centered on a plane perpendicular to the axis of the bolt (38). When divided into four quadrants with, the outer edge (42d) is formed in every other quadrant so as to be orthogonal to one coordinate axis (x) in the forward direction of tightening the nut (40). , The portion of the fastener (42) that enters every other quadrant is formed to have an outer edge that does not prevent rotation when the fastener is rotated in the T-shaped groove (34) in the direction of tightening the nut. The cable trough fixing metal fittings characterized in that 6. The fixing fitting according to claim 5, wherein the overhanging piece (42c) of the fastening fitting (42) extends from the alternate quadrant to the adjacent quadrant in the forward direction of tightening the nut (40). And the overhanging pieces (42c) formed in the adjacent quadrants have a radius from the axis of the bolt to the outer edge (42d) of the overhanging pieces formed in the alternate quadrants. A cable trough fixing metal fitting having an arcuate outer edge (42e) or an outer edge located inside thereof. 7. A fastener (42) in which the bolts (38) of the fixing fitting (36) according to any one of claims 3 to 6 are fitted into the bolt holes of the support (16) installed at appropriate intervals. And the trough body (12) of the cable trough according to claim 1 is placed on the support (16), and the T-shaped groove (34) is formed on the bottom surface of the trough body. Insert the fastener (42) of the fixing bracket into the
Rotate the nut in the direction to tighten the nut (40), insert the overhanging piece (42c) of the fastener into the lateral groove (34b) of the T-shaped groove, and tighten the nut (40) to support the cable trough (10). A method of fixing a cable trough, characterized by fixing to a body (16).