JPH11132192A - Ceiling electric fan - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a blade of a ceiling electric fan from separating when breaking near a mounting part. SOLUTION: A ceiling electric fan has a blade 1, a locking tool 3, and a cowling 110, and they are mounted to the body in the condition that they are integrated by screwing an end of the locking tool 3 and the cowling 110 with a mounting part of the blade 1. The locking tool 3 is locked on a surface of the blade 1 such that the other end of the locking tool is a given distance away from the mounting part with a band-shaped metal plate long in the tip direction of the blade 1. Because the blade 1 breaks near a mounting part due to again fatigue, and, even if it breaks, its flakes is moored at the mounting part by the locking tool 3, the blade 1 does not separate from the body or fall, and therefore, circumferential safety is secured.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plurality of ceiling fans mainly used by being attached to an indoor ceiling surface.

[0002]

2. Description of the Related Art Conventionally, this type of ceiling fan has been disclosed in
What is described in 15838 is known.

Hereinafter, the ceiling fan will be described with reference to FIGS. 9 and 10. Body 1 as shown
01 has a built-in outer rotor type motor and stator 1
The upper end of the fixed shaft 103 fixed through the center of the center 02 is fixed to the ceiling surface of the building. A control box 104 is attached to the lower end of the fixed shaft 103, and electrical components such as a signal receiver and a signal processing circuit for remotely controlling the operation of the main body 101 by an optical signal from a remote operation unit (not shown) are provided. Built-in. The rotor 105 is fixed inside the outer frame 106, and is rotatably mounted on the outer periphery of the stator 102 via an end plate 107 and a ball bearing 108.
The blades 109 are fixed radially to the outer edge of the lower surface of the end plate 107 together with the cowling 110 by screwing.
The material of the blade 109 is often made of synthetic resin.

[0004]

In such a conventional ceiling fan, the blade 109 is constantly subjected to a stress for pushing air downward on the blade surface during rotation, and the stress concentrates on the root of the blade during operation. There is a safety problem in that the blade 109 may be broken and fall if used for a long period of time, and it is required that the blade 109 not be detached from the main body even if it is damaged.

[0005] The installation of the ceiling fan in the place of use is as follows.
First, the main body 101 is fixed to the ceiling, and then a plurality of blades 109 are screwed one by one to the end plate 107. The blade is supported with one hand on a scaffold at a high place such as a stepladder, and the screw is screwed with the other hand. There is a problem that it involves a difficult operation of performing a tightening operation, and it is required to be able to use both hands when screwing the blade.

The present invention solves such a conventional problem. Even if the blade is broken at the root, the broken piece can be prevented from falling, and both hands can be used freely at the time of mounting the blade. The purpose is to provide a ceiling fan that can be used.

[0007]

In order to achieve the above object, a ceiling fan according to the present invention has blades radially arranged on a rotor side of a motor section, and one end fixed to the rotor side and the other end. Is provided with a locking tool which is locked to the blade.

According to the present invention, there is provided a ceiling fan capable of preventing a broken piece from falling even if the blade is broken at the root.

Another means is a blade mounted on the rotor side of the motor portion, a plurality of recesses provided in the blade mounting portion on the rotor side, and fitted into the recess with a gap in the vertical direction. It is provided with a plurality of blades having claw portions.

According to the present invention, a ceiling fan which can use both hands freely at the time of installing the blades is obtained.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention comprises a blade radially arranged on the rotor side of a motor section, and a locking member having one end fixed to the rotor side and the other end locked to the blade. In any case, such as breakage of the blade due to an impact external force or breakage due to fatigue of the material, stress concentrates on the part immediately near the mounting and fixing point, and the blade breaks. Has the effect of mooring to

Also, a plurality of blades having blades mounted on the rotor side of the motor portion, a plurality of recesses provided in the blade mounting portion on the rotor side, and a plurality of claw portions which are fitted into the recesses with a vertical gap therebetween. The blades are provided, and when the blades are attached to the main body, that is, the motor portion, the blades are temporarily locked by inserting the claw portions of the blades into the recesses of the rotor.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. The same parts as those in the conventional example are denoted by the same reference numerals, and detailed description is omitted.

[0014]

【Example】

(Embodiment 1) As shown in FIGS. 1 to 5, the main body 101 has an outer rotor type motor, and the upper end of a fixed shaft 103 fixed through the center of the stator 102 is fixed to the ceiling surface. Then, the entire main body 101 is attached to the ceiling surface. A control box 104 for controlling the operation of the main body 101 is fixed to the lower end of the fixed shaft 103. Rotor 105
Is fixed inside the outer frame 106 and is rotatably mounted on the outer periphery of the stator 102 via an end plate 107 and a ball bearing 108. The blade 1 is made of polycarbonate resin in order to ensure the strength and the accuracy of the shape and dimensions, and is provided with three through holes for mounting the blade at one end of the short side of the surface. A substantially L-shaped recess 2 is provided from two holes including the middle one along the long side of the blade toward the tip. The locking member 3 is a flexible metal plate. In this embodiment, the locking member 3 has a substantially L-shape using a galvanized steel plate, and has substantially the same size and shape so as to be fitted into the recess 2. That is, the locking tool 3 is composed of two mounting holes and a long side 4 extending in a direction perpendicular to the straight line passing through the center of the two holes and extending from the short side. Is provided with a wide portion 5.
Further, the concave portion 2 has a shape and a size into which the wide portion 5 can easily fit, and is provided with an eave portion 6 which covers the edge portions on both sides of the wide portion 5. The blade 1 is provided with two
It is fastened and fixed by the book mounting screws 7,
A cowling 110 is used to strengthen the attachment and cover the attachment portion. The cowling 110 has an arc-shaped outer wall having a hole into which the fixed side, which is one end of the blade 1, is inserted horizontally. The overhanging portion 111 that supports the mounting portion of the blade 1 is horizontally formed from below the inside of the arc of the outer wall. It is molded with reinforced resin.

In the above configuration, after the locking tool 3 is fitted into the recess 2 of the blade 1, this fixed side is inserted into a hole in the outer wall of the cowling 110, and the blade 1 is engaged with the center hole of the blade mounting hole of the blade 1. The stopper 3 is screwed and fixed together. Next, this feather 1
The cowling 110 with the end plate 107
Screw on the outer edge of the lower surface of. That is, the blade 1 and the locking member 3 are fixed by being sandwiched between the cowling 110 and the end plate 107.

Next, when the operation is performed, a bending load is repeatedly applied to the mounting portion of the blade 1 due to the air resistance during rotation, and the blade may be broken due to long-term use if the secular change or the molding distortion is large. However, as shown in FIG.
Since the wide part 5 at the tip of the blade 1 is locked to the eave part 6 of the blade 1, the fragments do not come off. The locking piece 3 is a thin metal plate that is lightweight and small, so that there is no weight imbalance of the rotating body, and the locking piece 3 is attached by fastening together when the blade 1 and the cowling 110 are assembled. Furthermore, since the screw is securely and firmly screwed to the end plate 107 together with the cowling 110, even if the cowling 110 is broken, the blades can be joined to the main body.

Even if the locking piece is made of a wire or a material other than metal, the same effect can be obtained as long as it is lightweight with little deterioration over time.

(Embodiment 2) FIGS. 6 to 8 show a cowling 8 which is provided with a claw 9 projecting from both inner ends of an arc-shaped outer wall and whose tip is directed downward, and a hook 11 corresponding to the claw 9.
2 shows the relationship with the configuration of the end plate 10 provided with.

The blade 1 is screwed from below onto the lower surface of the end plate 10 of the main body suspended from the top. First, the claw 9 of the cowling 8 to which the blade 1 is assembled is attached to the square cylindrical shape of the end plate 10. When inserted into hook part 11,
The downwardly directed tip of the claw 9 is hooked by the hole 12 provided on the lower surface of the hook portion 11, and the blade 1 can be held at the mounting position in a substantially horizontal state. By freely screwing and tightening the mounting screw 7 using both hands, the upward work at a high place can be performed safely and reliably.

[0020]

As is apparent from the above description of the embodiment, according to the present invention, the rotor is provided with one end fixed to the rotor and the other end to the blade so that the blade can be operated during operation. In the event that is damaged, the broken piece is moored by the locking member, so that a safe ceiling fan that does not scatter or fall can be provided.

Further, a concave portion is provided in the blade mounting portion of the rotor,
The blades have claw portions, and when the blades are attached to the rotor, the claw portions can be caught in the recesses and can be temporarily held, and both hands can be free when screwing upwards at high altitudes And a ceiling fan that can be used safely and securely.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a main part of a blade attachment according to a first embodiment of the present invention.

FIG. 2 is a sectional view of an essential part of the same.

FIG. 3 is an assembled perspective view of the main part.

FIG. 4 is an enlarged view of the locking portion.

FIG. 5 is a sectional view of a main part when the blade mounting part is broken.

FIG. 6 is an assembled perspective view of a blade mounting portion according to a second embodiment of the present invention.

FIG. 7 is a sectional view of a main part of the blade attachment.

FIG. 8 is a perspective view showing the blade mounting operation state.

FIG. 9 is a sectional view of a conventional ceiling fan.

FIG. 10 is a sectional view of a main part of the blade mounting portion.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Blade 3 Locking device 8 Cowling (blade mounting part) 9 Claw (claw part) 12 Hole (recess) 105 Rotor (rotor side)

Claims (2)

[Claims] 1. A ceiling fan comprising: blades radially arranged on a rotor side of a motor unit; and a locking member having one end fixed to the rotor side and the other end locked to the blades. 2. A blade mounted on a rotor side of a motor unit,
A ceiling fan comprising: a plurality of recesses provided in the rotor-side blade attachment portion; and a plurality of blades having a claw portion fitted into the recess with a gap in the vertical direction.