JPH0717835Y2 - Fan guard mounting device - Google Patents

Description

[Detailed Description of the Invention] (a) Field of Industrial Application The present invention relates to a mounting device for front and rear guards covering fan blades of a fan.

(B) Conventional Technology As a technology prior to the present invention, there is a guard attachment device described in the specification and drawings attached to the application of Japanese Utility Model Application No. 62-41279 filed on Mar. 20, 1987. The guard mounting device connects the outer ring of the front guard and the outer ring of the rear guard so that they can be disassembled by the connecting ring body. And the elasticity of the outer ring. The engaging force between the outer ring and the protrusion is constant in each part, and the engaging force is set to a force that is not decomposed when the fan falls or a person collides with the fan.

In the structure, the connecting ring is engaged with and integrated with the front guard, and the upper hook portion of the connecting ring is hooked on the outer ring of the rear guard and rotated around that to engage the protrusion with the outer ring.

(C) Problems to be Solved by the Invention In the conventional technology, a large force is required for engaging the projection with the outer ring or for removing the outer ring from the projection.

The present invention provides a guard mounting device for an electric fan, which can surely engage the front guard and the rear guard in a state of being connected by a connecting ring, and can be smoothly operated at the time of connection, disconnection, or attachment / detachment. Is the technical problem.

(D) Means for Solving the Problems The present invention is a structure in which an outer ring of a front guard and an outer ring of a rear guard are disassembleably connected by a connecting ring body. A holding portion for fitting and locking the outer ring is formed, a hook portion for the other outer ring is formed on the upper portion of the inner surface on the other side of the coupling ring, and a hook portion for the other outer ring having a detachment operation portion on the lower portion of the inner surface for the other side is formed. The problem is solved by means of forming an engaging projection, engaging the other outer ring at the intermediate portion on the other side of the inner surface, and forming an auxiliary engaging projection in which the inner end edge is inclined in the circumferential direction. .

The inclination formed on the inner end edge of the auxiliary engagement protrusion is formed so that the protrusion amount on the hooking part side is large and the protrusion amount on the separation operating part side is small when the operation force at the time of disengagement is reduced. When reducing the operating force during mounting, the protrusion amount on the hooking part side is small and the protrusion amount on the detaching operating part side is large. It is formed so that the amount of protrusion of the central portion is large and the amount of protrusion of the hook portion side and the detachment operation portion side is small.

A portion of the auxiliary engagement protrusion having a large protrusion amount is formed to be equal to or slightly smaller than the protrusion amount of the engagement protrusion.

(E) Action In the present invention, the connecting ring body in which one guard is fitted and locked by the holding portion is securely attached to the outer ring of the other guard by the hooking portion and the engaging protrusion, and is attached to the auxiliary engaging protrusion. Holds the side of the connecting ring and the other guard.

When the connecting ring body is rotated around the hooking portion, the inclination of the auxiliary engagement protrusion serves as a guide for bending the outer ring inward, and the outer ring easily gets over the auxiliary engagement protrusion.

The auxiliary engagement protrusion has a sufficient locking force against a force in the direction of pulling the connecting ring body straight forward or backward instead of rotating.

(F) Embodiments The configuration of the present invention will be described in detail with reference to the drawings.

FIG. 8 shows a right side view of the electric fan 1, and the electric fan 1 has the support columns 2
The pedestal 3 having a protruding portion is mounted on the upper portion of the support column 2 via the neck piece 4 so that the elevation angle can be adjusted freely, and the rear guard 7 mounted on the front portion of the rotating shaft 6 of the electric motor portion 5 protruding.
And a front guard 11 mounted on the outer ring 9 of the rear guard 7 by a connecting ring body 10.

The rear guard 7 is a mounting body 12 having an insertion portion for the rotary shaft 6 in the center.
A plurality of wire rods 13 are radially installed between the outer periphery of the mounting body 12 and the outer ring 9. The outer ring 9 is formed of a wire having a circular cross section, but its shape is not particularly limited. The front guard 11 has an ornament 14 in the center and a plurality of wire rods 16 radially between the outer periphery of the ornament 14 and the outer ring 15.
Has been installed.

The front guard 11 and the rear guard 7 cover the blower blade 8 to prevent the user from directly contacting the blower blade 8. Therefore, the structure corresponding to the wire rods 12 and 16 can be implemented by variously changing the mesh shape.

The connecting ring body 10 is formed of an elastic material such as synthetic resin. The connecting ring body 10 is formed in an L-shaped cross section with a rib 17 protruding inward at the front end. The outer ring of the front guard 11 is located between the upper and lower parts, the left and right parts, and each part on the inner surface of the connecting ring body 10.
A protrusion 19 that forms a holding portion 18 that fits and locks 15 with rib 17.
Is formed. The outer ring (15) is fitted and locked to the holding portion (18) by using the elasticity of the connecting ring body (10) and the outer ring (15) by covering the outer ring (15) from the front of the front guard (11). In this state, the outer ring 15 is covered from the front by the rib 17 so that the front guard
The front guard 11 and the connecting ring body 10 can be handled as an integrated body unless the connecting ring body 10 is bent forward by a strong force with respect to the bending member 11.

A fitting holding portion 20 of the outer ring 9 of the rear guard 7 is formed on the upper portion of the connecting ring body 10 between the protrusion 19 forming the holding portion 18, and the wire rod 13
The hooking portion 21 is formed by a bifurcated projection that serves as a stopper for positioning and locking the rear guard 7 by holding the.

At the lower part of the connecting ring body 10, an engaging projection 22 that forms a fitting holding portion 20 of the outer ring 9 of the rear guard 7 is formed between the projection 19 that forms the holding portion 18. A disengagement operation portion 23 protruding rearward is formed at a portion where the engagement protrusion 22 is formed. Engagement protrusion 22
As shown in FIGS. 1 and 2, it is formed to have the same height E as the protrusion 19 so that the engagement with the outer ring 9 does not come off accidentally. By pulling the disengagement operation portion 23 downward and bending it, the portion of the connecting ring body 10 in which the engaging protrusion 22 is formed can be bent outward, so that the detachment from the outer ring 9 can be performed smoothly. I have to.

Protrusions 19 are formed on the inner surface on both left and right sides of the connecting ring body 10 and on the inner surface of the lower middle.
Auxiliary protrusions 25, 2 forming an auxiliary holding portion 24 of the outer ring 9 between
6 is formed to be lower than the protrusion 19, and the auxiliary protrusion 26 in the lower middle is formed to be lower than the auxiliary protrusion 25.

An auxiliary engagement protrusion 28 that forms an auxiliary holding portion 27 of the outer ring 9 is formed between the protrusion 19 and the inner surface of the upper portion of the coupling ring body 10. The protrusion amount of the auxiliary engaging protrusion 28 is as shown in FIG.
The 21 side has a dimension C, and the opposite side has a dimension D as shown in FIG. 5, and C> D is formed so that the inner end edge of the auxiliary engagement protrusion 28 is an inclined surface inclined in the circumferential direction. In this structure, the dimension C is the same as the dimension E of the protrusion 19.

As shown in FIG. 6, the front guard 11 fitted with the connecting ring body 10 covers the upper part of the connecting ring body 10 on the upper part of the rear guard 9, and the hook portion 21 is hooked on the outer ring 9 as shown in FIG.
After that, the hook 21 is rotated around the center to engage the auxiliary engagement protrusion 28 and the auxiliary protrusions 25 and 26 of the coupling ring body 10 with the outer ring 9 in order, and the engagement protrusion 22 is engaged last. Complete the installation.

At the time of detachment, the detachment operating portion 23 is pulled downward to bend the connecting ring body 10 to disengage the engagement protrusion 22 from the outer ring 9.
By pulling further toward you, the engagement of the auxiliary protrusions 25 and 26 will be released,
The front guard 11 can be removed from the rear guard 7 when the auxiliary engagement protrusion 28 is finally released. When the auxiliary engaging protrusion 28 is disengaged from the outer ring 9, the inclined surface serves as a guide to easily get over the outer ring 9.

(G) Effect of the Invention According to the invention, the rear guard and the front guard are connected by the connecting ring body by inclining the inner end edge of the auxiliary engaging protrusion in the circumferential direction, and the operability at the time of disengagement is improved. However, the connected state can be surely maintained.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows the present invention, FIG. 1 is a rear view of a connecting ring, FIG. 2 is a sectional view of the same side, FIG. 3 is an exploded perspective view of an essential part, and FIG.
FIG. 4 is a sectional view taken along line IV-IV in FIG. 5, FIG. 5 is a sectional view taken along line VV in FIG. 1, FIGS. 6 and 7 are side views of the front guard attaching process, and FIG. 8 is a side view of the fan. 7 ... Rear guard, 9 ... Outer ring, 10 ... Connection ring, 11 ...
Front guard, 15 …… Outer ring, 17 …… Rib, 18 …… Holding part, 19
...... Projection, 20 …… Holding part, 21 …… Hooking part, 22 …… Engagement projection part, 23 …… Disengagement operation part, 28 …… Auxiliary engagement projection part.

Claims (1)

[Scope of utility model registration request] 1. A retainer for connecting an outer ring of a front guard and an outer ring of a rear guard so as to be disassembled by a connecting ring body, in which one outer ring of the front and rear guards is fitted and locked on one inner surface of the connecting ring body. Forming a portion, a hook portion to the other outer ring is formed on the inner surface other side upper part of the coupling ring body, and an engaging protrusion to the other outer ring having a disengagement operation part is formed on the inner surface other side lower part, A guard mounting device for a fan, comprising an auxiliary engaging protrusion that is engaged with the other outer ring and has an inner end edge inclined in the circumferential direction at an intermediate portion on the other side of the inner surface.