JPS5845456Y2 - cable tray - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cable tray used for laying cables.

Generally, as shown in FIG. 1, a cable tray includes a pair of main beams 1a and 1b facing each other and spaced apart from each other.
It is composed of child beams 2a and 2b which are sandwiched between these parent beams at appropriate intervals along the length direction.

As shown in FIG.
is snake laid, and the inflection point of the cable is fixed to the sub-girder 2a as described below.

That is, four insertion holes 5 are formed in advance in the sub-girder 2a, which is arranged at a position that is to be an inflection point of the cable to be laid, and each insertion hole has a center point as shown in FIG. screw hole 6
An embedded nut 1 having a top portion 6' having a mesh knurling is driven into a concave portion 8 inside the child beam 2a.

On the other hand, a rubber bushing 9 is attached to each cable 4 at the inflection point position with the top open, and a fixing cleat 10 is provided straddling the outer periphery of each rubber bushing.

Insertion holes are formed in the horizontal portion 11 of the fixing cleat, and bolts 12 are inserted into each of the insertion holes, and the tips thereof are screwed into the screw holes 6 of the embedded nuts γ.

However, in such cable trays,
Since the installation interval L1 of fixing fixtures 1 and 1-t must be approximately the same, embedded nuts must be installed at approximately the same interval even if the length L2 of the cable tray is different on the installation route. .

For this reason, it is necessary to determine in advance the installation position of the embedded nuts for each cable tray, and install the cable tray at the designed position.

Preliminary planning has to be done for each subject because the installation route is different for each subject, and the work is complicated.

Furthermore, since each cable tray has a fixed installation location, it takes a long time to find the appropriate cable tray when installing it on site.

The present invention was developed based on the above circumstances, and is intended to provide a cable tray that can be applied to any installation route.

Hereinafter, the present invention will be explained based on the drawings of one embodiment.

As shown in FIG. 1 and FIG. 4, in which the same parts as in FIG. 2 are given the same reference numerals, the cable tray 3' according to the present invention is
A pair of parent girders 1atl arranged opposite to each other with an interval between them
b and this parent girder at appropriate intervals along the length direction.

The muntin girder 13 is composed of a pair of child girders 14a and 14b, which are arranged in parallel between the parent girders while maintaining a gap L3 sufficient for inserting fixing bolts, which will be described later.

Each child girder 14a, 14b is connected to the parent girder 1a as shown in FIG.
It is firmly fixed between the main girders by bolts 15 screwed in from the sides.

Next, a method for fixing cables placed and laid on the cable tray of the present invention will be explained.

That is, in FIG. 5 and FIG. 6, the cable 4 at the position where the inflection point of the laid cable 4 should be is surrounded by rubber bushings 9 that are attached with the top open, and the outer periphery of each rubber bushing is A fixed crease NO having an insertion hole 16 in the horizontal portion 11 is provided astride the horizontal portion 11 .

A fixing bolt 17 is inserted into each of the insertion holes 16, and this fixing bolt is inserted into the gap L3 between the pair of child beams 14a and 14b.
, and a nut 19 is inserted through the washer 18 at its tip.
is tightened and fixed.

In the above-mentioned invention, each pair of child girders is sandwiched between the parent girders, and these child girders are arranged in parallel between the parent girders while maintaining a gap sufficient to allow the fixing bolts to pass through. Therefore, as described above, the fixed cleat can be fixed at any position on the child girder.

Therefore, with this invention, cable trays of standard length that can be used for any cable installation route can be mass-produced, so there is no need to design for each item, inventory management is easy, and it is economically advantageous. It is.

[Brief explanation of the drawing]

Figure 1 is a top view of a conventional cable tray, Figure 2 is a cross-sectional view showing the cable laid on the cable tray and fixed at the inflection point, and Figure 3 is a child girder with an embedded nut. 4 is a top view of the cable tray of the present invention, and FIG. 5 is a sectional view showing the cable placed on the cable tray and fixed at the inflection point position. FIG. 6 is a sectional view showing a state in which the fixing cleat is fixed to the muntin girder. 1a, 1b...Main girder, 3, 3'...Cable tray, 4...Cable, 9...Rubber bushing, 10...
・Fixed IJ-), 13...Muntin girder, 14at14b
...a pair of child digits.

Claims (1)

[Scope of utility model registration request] Muntin girders are clamped at appropriate intervals along the length between a pair of parent girders arranged oppositely at intervals,
A cable tray characterized in that the muntin girder is composed of a pair of child girders, and these child girders are arranged in parallel between the parent girders with a sufficient distance to allow the fixing bolts to pass through.