JPH02586Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a ventilator case for a fan, and more particularly to a ventilator case for a fan molded from synthetic resin or cast alloy material to facilitate the installation work of the fan.

Figures 1 and 2 a and b show conventional fans,
1 is the fan motor, 2 is the cylindrical bench case of the fan, and 3 is the fan bench case 2.
It is a rectangular flange provided at both ends.

In order to attach a conventional fan to another structure (not shown), holes 4 are drilled in the four corners of the flange 3 of the ventilary case 2 of the fan, and bolts are tightened to the structure through these holes. However, when tightening the bolt, it was necessary to hold the nut by hand to prevent it from spinning, which was extremely troublesome.

In addition, if the fan is a small and thin product, the nut insertion part is narrow and tightening is difficult, and the bolt must be inserted from one side of the fan to the front and rear flanges 3a and 3b. The method of fixing the fan by screwing it into a screw hole drilled in the structure to which it is attached is expensive, and in this case, a force is applied to one flange 3a or 3b in the direction of the structure, and the flange 3a ,3b
However, due to the thinness of the wall, there were drawbacks such as deformation and cracking.

Therefore, as shown in FIGS. 3a and 3b, in order to prevent the flanges 3a and 3b from deforming, both flanges 3a and 3b are
Some products are equipped with a cylindrical flange 3c that has a bolt through hole that connects 3b, but in this case, it is not possible to tighten only one flange to the structure with a bolt as described above, so a long bolt is required. had to be used, which had the disadvantage of high costs.

The object of the present invention is to obtain a fan ventilator case that eliminates the above-mentioned drawbacks.

The ventilator case of the present invention includes a mounting hole penetrated through the flanges provided on both end surfaces of the fan ventilator case, and a connecting flange connecting the flanges at both ends at a position that matches the mounting hole. A nut engaging portion is formed on the connecting flange to receive a nut disposed corresponding to the mounting hole and prevent the nut from idling.

Embodiments of the present invention will be described below with reference to the drawings.

In the present invention, as shown in FIGS. 4a and 4b, a recess 5 is formed to match the shape and width of the nut to be used during installation when molding the fan's ventilly case 2 with a resin mold or metal die-casting.
Attach the flanges 3a and 3 to the cylindrical flange 3c, respectively.
b adjacent to the corner side of each flange in a position that matches the hole 4, so that when a nut is inserted into the recess 5, the nut is held non-rotatably by the recess 5.

Since the ventilator case of the fan of the present invention has the above-described structure, for example, as shown in FIG.
When installing the bolt 8 from the structure 6, insert the nut 7 into the recess 5 adjacent to the flange 3a.
If it is screwed into the nut 7 through the hole 4 on the side of the flange 3a of the fan, the nut 7 will not spin idly in the recess 5, so the ventilator case 2 of the fan can be easily attached to the structure 6. This has the great advantage of being easy to position and position.

In the present invention, instead of providing the cylindrical flange 3c as shown in FIG. A recess 5 having a size and shape into which the outer peripheral portion of the recess 7 can be fitted may be formed.

In addition, when attaching the ventilator case 2 to the structure 6 with long through bolts 9, insert the nuts 7 into the recesses 5.
A screw hole is formed in the structure 6, as shown in FIG. , is screwed into the screw hole of the structure 6 through the hole 4 on the flange 3a side. In any of the embodiments, when the flange is passed through and fixed with a through bolt, the strength of the flange part against bolt tightening is not impaired, and the ventilate case according to the present invention is suitable for cases where only one flange is tightened. It can be used both for passing through the flange and tightening with a through bolt.

[Brief explanation of the drawing]

Fig. 1 is a front view of a conventional fan, Fig. 2 a is a side view of the flange of the ventilary case of the fan, Fig. 2 b is an inner end view thereof, and Figs. 3 a and b are other conventional ventilary fans. A side view and an inner end view of the flange in the case, FIGS. 4a and 4b are a side view and an inner end view of the flange of the ventilate case of the present invention, and FIGS. 5a and b are the flange in another embodiment of the invention. The side view and inner end view of FIG. 6, and FIG. 7 are explanatory diagrams of a state in which the ventilate case is attached to a structure, respectively. 1...Fan motor, 2...Venture case, 3, 3a, 3b, 3c, 3e...Flange,
4...hole, 5...recess.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A mounting hole penetrating the flanges provided on both end faces of the ventilator case of the fan, and a connecting flange that connects the flanges at both ends at a position that matches the mounting hole. and a nut engaging portion formed on the connecting flange to receive a nut disposed corresponding to the mounting hole and prevent the nut from idling. (2) A ventilator case for a fan according to claim 1, wherein the connecting flange is a cylindrical flange, and a bolt through hole is formed through the cylindrical flange. (3) A ventilator case for a fan according to claim 1, wherein the connecting flanges are plate flanges extending parallel to each other, and bolt holes are formed between the flanges.