JPS6210532A - Ventilation fan - Google Patents

Abstract

PURPOSE:To make it possible to instantaneously and readily carry out attachment or detachment of a vane by providing a vane having at its central part a boss part at the center fixed to a motor shaft and a spinner fitted to the boss part. CONSTITUTION:Fitting of a vane 3 is carried out in such a manner that as small projections 11 provided around the inner periphery of a hole 10 of a spinner 9 is elastically deformed around the outer periphery of a boss part 7, the boss part 7 is forced into the hole 10, the small projections 11 are engaged with slant grooves 6, the spinner 9 is rotated to align L-shaped cutaway portion 12 with an I-shape 8 of the boss part 7, a motor shaft 1 is inserted into a hole 5, a pin 2 is inserted into a hole 5 so that it reaches the deepest portion of the I-shaped cutaway portion 8, the spinner 9 is rotated in the left hand, and the pin is fixed between the deepest portion of the I- shaped cutaway portion 8 and a constricted part 12a of the L-shaped cutaway portion 12. Further, the removal of the vane 3 is carried out in a manner reverse to the fitting procedure. That is, the spinner 9 is rotated in the right hand, and the L-shaped cutaway portion 12 of the spinner 9 is aligned with the I-shaped cutaway portion of the bass part 7, and extracted from the motor shaft 1 whereby the vane 3 is removed.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a ventilation fan that is attached to a wall or ceiling to ventilate a room.

BACKGROUND OF THE INVENTION In recent years, in order to install a ventilation fan in a narrower space, there has been a demand for thinner blades and a simpler method for installing the blades.

For this reason, the blades of conventional ventilation fans are fixed on the shaft 101, which is the rotation axis, as shown in FIG. 8, for example.
A threaded portion is provided at the tip of the screw portion, and a notch portion 101a is provided in the threaded portion in parallel with the axial direction.On the other hand, the blade 102 is provided with a hole in the center into which the shaft 101 is inserted, and a notch portion 101a is provided in the threaded portion in parallel with the axial direction. A protrusion 102a that matches the notch 101a is provided. With this configuration, the shaft 101 is connected to the blade 102.
When inserted, the notch 101a and the convex portion 102a engage with each other, forming a stopper in the rotational direction. Fixation in the axial direction was achieved by screwing the spinner 103 into the threaded end of the shaft 101 passing through the blade 102.

Problems to be Solved by the Invention In such a conventional configuration, when the blade 102 is attached or detached, the spinner 103 is attached to the shaft 101 using the screw 11.
There was a problem in that it took a long time to attach and detach because it had to be attached many times for 0.18 minutes. Also, shaft 10
1 and the blade 102 are fixed using screws, so there was a problem that the screw threads were difficult to match.

The present invention solves these problems and provides a ventilation fan in which one blade can be attached and detached instantaneously, easily, and reliably.

Means for Solving Audible Problems In order to solve this problem, the present invention BA//i includes a motor shaft, a blade rotation stopper pin attached through the motor shaft in a direction perpendicular to the motor shaft, and a pin fixed to the motor shaft. a spinner that fits into the boss part; the boss part has a shaft hole into which the motor shaft is inserted; and a shaft hole in which the motor shaft is inserted perpendicularly to the shaft hole. A machine-shaped notch is provided on the insertion side end surface and an oblique tile is provided on the outer periphery, and the spinner has a hole that fits with the outer periphery of the boss portion, and an L hole on the insertion side end surface of the boss portion at right angles to the hole. A small projection is provided on the inner periphery of the shaped notch and the hole.

Operation With this configuration, the blades are sometimes attached by engaging the JS protrusion provided on the inner periphery of the spinner hole and the diagonal groove of the boss to attach the integrated spinner and blade to the motor shaft. It is attached by inserting it and rotating the spinner while holding the blade, while removal can be done by holding the blade and rotating the spinner in the opposite direction from the time of installation, making it very easy to attach and remove. will be possible.

Embodiment Hereinafter, an embodiment of the present invention will be described based on FIGS. 1 to 7. In the figure, reference numeral 1 designates a motor shaft, and is provided with a pin 2 that passes through the shaft center in a direction perpendicular to the shaft center and projects to the outer diameter. 3 is a blade, and has a boss part 7 in the center of the lip 4, which is a joint part of grade 3a provided radially. An oblique groove 6 is provided in the shaft hole 6, and a machine-shaped notch 8 is provided at the entrance portion of the shaft hole 6, passing through the shaft center at right angles to the shaft center. Reference numeral 9 denotes a spinner, which has a tip-filled hole 1o in its center that fits with the outer periphery of the boss 7, and engages with an oblique @e provided on the outer periphery of the boss 7 in the inner periphery of this hole 10. A small protrusion 11 and an L-shaped notch 12 passing through the axis of the hole 1o at right angles to the axis of the hole 1o are provided at the entrance of the hole 1o.

In the above configuration, the blade 3 is attached by pushing the boss part 7 into the hole 10 of the spinner 9 while elastically deforming the small projection 11 provided on the inner periphery of the hole 1o of the spinner 9 on the outer periphery of the boss part 7. The spinner 9 is rotated to align the L-shaped notch 12 with the machined notch 8 of the boss 7, and the motor shaft 1 is inserted into the shaft hole 5 of the boss 7. , insert the pin 2 so that it reaches the deepest part of the notch 8, and rotate the spinner 9 counterclockwise to remove the pin 2.
is fixed between the deepest part of the machine-shaped notch 8 and the constricted part 12a of the L-shaped notch 12°.

In addition, for removal, rotate the system pinner 9 clockwise in the opposite direction to the installation, and remove the L-shaped notch 12 of the spinner 9 and the boss portion 7.
The blade 3 can be removed by aligning the notches in the machined shape and pulling it out from the motor shaft 1.

Effects of the Invention As is clear from the description of the embodiments above, according to the present invention, the blades can be instantly and easily and reliably moved by simply slightly turning the spinner, which is integrated with the blade boss portion in a rotatable manner. In addition, since it is removable, the blades can be easily replaced even if the ventilation fan is installed in a narrow space.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing how the blades of a ventilation fan and a spinner are attached according to an embodiment of the present invention, FIG. 2 is a perspective view showing how the blades of the ventilation fan are attached, and FIG. Fig. 4 is a sectional view taken along BB' of Fig. 3, Fig. 5 is a perspective view of the boss of the ventilation fan, and Fig. 6 is an unfixed part of the ventilation fan. FIG. 7 is an exploded view of the blade boss and the spinner, and FIG. 8 is an exploded perspective view showing the blade attachment portion of a conventional ventilation fan. 1...Motor shaft, 2...Pin, 3...
...Blade, 6 ... - ... Shaft hole, 6 ... Diagonal groove, 7 - ... Boss part, 8 ... Machining shape notch, 9 ...Spinner, 1o...hole, 11...small protrusion, 12...L-shaped notch. 3°-ri] 碍9--sum 0-length 40-m-change Figure 6 loco ward. 4 School of Law

Claims (1)

[Claims] The motor has a motor shaft, a blade rotation prevention pin attached to the motor shaft so as to pass through the motor shaft in a perpendicular direction, a blade having a boss portion at the center that is fixed to the motor shaft, and a spinner that fits into the boss portion. The boss portion is provided with a shaft hole into which the motor shaft is inserted, an I-shaped notch on the insertion side end surface of the motor shaft perpendicular to the shaft hole, and an oblique groove on the outer periphery,
The spinner includes a hole that fits with the outer periphery of the boss portion;
The ventilation fan is provided with an L-shaped notch on the end surface on the insertion side of the boss portion at right angles to the hole, and a small protrusion on the inner periphery of the hole.