JPH0120600Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a pipe fan in which the mounting structure between the sleeve and the fan frame is improved.

[Prior art]

Figure 1 shows the conventional ventilation fan disclosed in Japanese Utility Model Application Publication No. 56-12725, where 1 indicates a fan frame;
2 is a grill attached to the opening of the frame 1, 3 is a motor supported within the frame 1, and 4 is a blade supported on the motor shaft. Reference numeral 5 denotes a pair of upper and lower leaf springs curved in a chevron shape, one end of which is supported by a stopper 5a on the outer surface of the frame 1. The leaf springs 5 are used to elastically load the inner wall of a pipe 7 attached to a wall surface 6, so that the frame 1 can be fixed. I support it.

By the way, even if the outside diameter of the pipe 7 is the same, the inside diameter differs depending on whether it is a thick-walled pipe or a thin-walled pipe.In the case of a thin-walled pipe, two upper and lower plates are attached to the frame 1 as shown in Fig. 1. It is equipped with a spring 5 and inserted into the pipe 7, but in the case of a thick-walled pipe, the inner diameter is small, so it is inserted into the pipe with one leaf spring removed. For this reason, only a part of the outer surface of the frame on the side from which the leaf spring was removed is in direct contact with the inner wall of the pipe, so the frame is more likely to come out than when the leaf spring is elastically mounted on the inner wall of the pipe. The strength was low, and therefore the frame had the disadvantage of not being able to provide stable support.

[Summary of the idea]

This invention was made for the purpose of improving this drawback. Two ribs are provided on the edges of the outer end surfaces of the legs protruding from the outer peripheral surface of the frame, and a pair of ribs are provided on the outer end surfaces of the corresponding legs. The present invention proposes a pipe fan that can be used with thin-walled pipes and thick-walled pipes by being equipped with a removable leaf spring.

[Example of idea]

An embodiment of this invention will be described below with reference to the drawings. Figure 2 shows how the fan is installed.
9 is a fan frame, 9 is a motor fixed to a mounting cylinder 10 of the frame 8 with a screw 11, and 12 is a blade supported on a shaft 9a of the motor 9 with a nut 13. 14 is a panel 15 integrated with the frame 8
A locking pawl 16 provided on the rear edge of the grill fits into the opening of the panel 15, and a locking pawl 16 provided on the rear edge engages with a locking hole 17 on the circumferential surface of the panel 15. Reference numeral 18 denotes a cross-shaped leg portion that integrates the mounting cylinder 10 and the frame 8 as shown in FIG.
Each strip of ribs 19 is protruded, and the vertical leg portions 18 are wide and have grooves 18a on the end faces.
20 is a leaf spring curved into a chevron shape, and has a folded part 2 at one end.
0a, the folded portion 20a is inserted into the groove 18a, and the pawl 20b of the leaf spring 20 is inserted into the hole 1 of the leg portion 18.
8b, and the leaf spring 20 engages with and supports the leg portion 18.
It is located between the ribs 19, 19 of. The frame 8 constructed as described above is inserted into a sleeve 22 attached to a wall 21, and the leaf spring 20 is elastically inserted into the sleeve wall. In addition, frame 8
When attaching the frame to the sleeve on the ceiling, use the wood screws 2 inserted into the frame 8 to prevent the frame from falling.
3 into the ceiling and fix it.

FIG. 4 shows the mounting state when the sleeve 22 is a thin-walled tube, in which the leaf springs 20 are mounted on the upper and lower legs 18 of the frame 8 as described in the above embodiment.
is resiliently mounted on the inner wall surface of the sleeve 22 to support the frame 8. FIG. 5 shows the installation state when the sleeve is a thick-walled pipe. In this case, the frame 8 with the leaf spring removed from one leg 18 is inserted into the sleeve 22. As a result, the lower leaf spring 20 is elastically mounted on the inner wall of the sleeve, and since the upper leaf spring is removed, the two ribs 19 and 1 of the leg 18
9 contacts the inner wall of the sleeve at two points, the strength of the frame to be pulled out is improved, especially on the contact side between the sleeve and the rib. Note that if the rib 19 is provided with an uneven surface, a rubber member, etc., the pull-out strength can be further improved.

[Effect of idea]

As described above, according to this invention, two ribs are protruded from the edges of the outer end surfaces of the legs protruding from the outer peripheral surface of the frame, and detachable leaf springs are attached to the outer end surfaces of a pair of corresponding legs. By providing this, it can be used with both thin-walled pipes and thick-walled pipes, and the frame can be strongly and stably supported even when one leaf spring is removed, especially in the case of thick-walled pipes. Also, the leaf spring is 2
Since it is located between two ribs, it has the advantage that the leaf spring does not shift in position.

[Brief explanation of drawings]

Figure 1 is a sectional view of a conventional ventilation fan, Figure 2 is a sectional view of a fan for pipes according to this invention, Figure 3 is a perspective view of the frame seen from the back, and Figure 4 is a fan installed on a thin-walled pipe. FIG. 5 is a rear view of the state in which it is attached to a thick-walled pipe. 8...Frame, 9...Motor, 10...Mounting cylinder, 12...Blade, 14...Grill, 18...
Leg, 19...rib, 20...leaf spring, 22...
sleeve. In addition, in the figures, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Scope of utility model registration request] In a pipe fan in which a frame equipped with fan equipment is inserted into a sleeve attached to a wall or ceiling surface, a plurality of legs protrude from the outer peripheral surface of the frame, and two strips are provided at the outer end of each leg. A fan for a pipe, characterized in that a removable chevron-shaped plate spring is provided between the ribs on the outer end surface of a pair of corresponding legs and supports the frame by coming into elastic contact with the inner wall of the sleeve. .