JPS6328357Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field This invention relates to ventilation fans, and more specifically to a structure for protecting the motor lead wires of ventilation fans.

(b) Prior art A conventional method for opening and closing the shutter of a ventilation fan is to rotatably support the stator of a fan motor, and rotate the stator by the reaction force generated on the stator when the rotor is driven. A method is known in which the shutter is opened and closed using the shutter (see, for example, Japanese Utility Model Publication No. 11247/1983).

In this ventilation fan, since the stator of the fan motor itself rotates when the shutter is opened and closed, the motor lead wire coming out from the stator cannot be fixed as in the conventional method. Furthermore, if the length is made to allow for rotation, the stator will become entangled with the ventilation fan body, inhibiting rotation of the stator, and resulting in a loss of rotational torque. Additionally, there was a risk that the motor lead wires would come into contact with the stator.

(c) Purpose of the invention This invention was created in view of these circumstances, and is designed to prevent the motor lead wires rotating together with the stator from interfering with the rotation of the stator when the stator of the fan motor rotates to open the shutter. In addition, the motor lead wire can be wound around a stator while protecting the motor lead wire itself.

(d) Structure of the device The structure of this device includes a shutter that closes the opening at one end of the ventilation fan body, a shutter string that opens and closes the shutter, a fan and its fan motor, and a fan that is located at the other end of the ventilation door body. and a frame for fixing the fan motor in the center of the main body so that the fan motor is located at the center of the main body.
A lead wire protruding coaxially from the stator and extending from the stator is provided on the shutter side, and a winding shaft is provided for winding the shutter string on the shutter side from the lead wire, and the lead wire winding portion of the winding shaft has a predetermined interval. 1 for accommodating the slack part of the lead wire facing each other.
This is a ventilation fan equipped with a pair of flanged lead wire cover panels.

(d) Examples This invention will be described in detail based on the examples shown in the figures below. Note that this invention is not limited to this.

First, in Figures 1 and 2, a ventilation fan 1 consists of a ventilation fan main body 2, a shutter 3 at one end of the main body,
3, 3, a shutter lever (connecting rod) 5 to which a shutter string (wire) 4 for opening and closing the shutter is attached, a motor section 6 in the center of the main body,
It is mainly composed of a fan 7 at the other end of the main body. In addition, 8 is a spring that pulls the shutter lever 5 upward, 9 is a cut-and-raised part that stops the lowering of the shutter lever 5 to determine the opening angle of the shutter 3, 10 is a spinner, and 27 is for changing the four directions of the shutter wire. It's a pipe.

The motor section 6 is composed of box-shaped frames 11, 11 fixed to the ventilation fan main body 2, and a fan motor 12 inside this frame.This fan motor is fixed to a fan motor outer frame 13 and an inner wall of this outer frame. The fan 7 is provided with a stator 14, a lead wire (motor lead wire) 17 connected to the stator, and a rotor 15 that supports the fan 7. Furthermore, the fan motor outer frame 13 has a boss 1 on the side wall on the side of the fan 7.
6, and a winding shaft 18 for winding the shutter wire 4 and motor lead wire 17 having the same axis and the same diameter is formed on the outer surface of the side wall on the shutter 3 side.
On the other hand, the frame 11 has a bearing 1 on an inner wall corresponding to the boss 16 and the winding shaft 18 of the fan motor outer frame 13.
9 and 20, the winding shaft 18 and the boss 16 are pivotally supported by these bearings, and the fan motor outer frame 13 is rotatably supported on the frame 11.

Further, the winding shaft 18 has a shutter wire 4 attached to the outside of the frame 11, and a lead wire cover (cord cover) 21 for winding and housing the motor lead wire 17 inside the frame 11. This cover is formed of two parallel disk-shaped collar pieces 22 and 23 that are arranged facing each other with a predetermined interval so as to have a space around the winding shaft 18, and include a collar piece on the fan motor 12 side, 23 is fixed to the fan motor, and furthermore, a motor lead wire 17 is connected near the winding shaft 18.
A hole 24 is formed to guide the cord from the fan motor 12 into the cord cover 21. Furthermore, cord cover 21
An elastic pressing piece (stopper) 25 is provided on the surface of the inner winding shaft 18 to urge the motor lead wire 17 in the winding direction, and this stopper has an inward circular arc 26 formed at its tip.

In such a motor section 6, the motor lead wire 17 enters the cord cover 21 from the stator 14 of the fan motor 12 through the hole 24 of one of the collar pieces 23, as shown in FIG.
Connected to an external power source (not shown).

When the ventilation fan 1 configured as described above is turned on, the fan motor 12 is driven to open the shutter 3 and rotate the fan 7 to perform ventilation. That is, when the fan motor 12 is driven, the stator 14
The reaction force of the rotor 15 acts on the stator 14, and the stator 14 rotates in the opposite direction to the rotor 15. Along with this rotation, the winding shaft 18 rotates, and the shutter wire 4 is wound around the winding shaft 18. The connecting rod 5 is pulled down to open the shutter 3 at a predetermined angle.

At this time, the winding shaft 18 winds up the motor lead wire 17 inside the cord cover 21 simultaneously with the winding of the shutter wire 4. By sequentially winding the shutter wire in this way, the connecting rod 5 hits the cut-and-raised part 9 and stops, and the shutter wire 4 is pulled toward the shutter 3 side and the winding shaft 1
Stop 8. Also, at this time, the motor lead wire 17
As shown in FIG. 4A, the stopper 25 pushes the winding shaft 18 outward in the radial direction.
Can be wound with a larger winding diameter.

If the shutter wire 4 should break for some reason when the shutter 3 is opened, a winding force for winding the motor lead wire 17 will directly act on the winding shaft 18. However, at this time, since the motor lead wire 17 is pushed up by the stopper 25, it is wound around the winding shaft 18 while gradually reducing the winding diameter, that is, its bending. As shown in FIG. 4B, by coming into close contact with the winding shaft 18 via the stopper 25, the rotation of the winding shaft 18, that is, the rotation of the stator 15 is stopped.

Next, when the power is turned off, the reaction force of the rotor 15 acting on the stator 14 disappears, and the fan motor 12 and the winding shaft 18 become capable of reverse rotation. At this time,
Since the shutter wire 4 at the tip of the winding shaft 18 is pulled by the spring 8 via the connecting rod 5,
The take-up shaft 18 is rotated in the opposite direction to the direction when the shutter 3 is opened to close the shutter 3. Furthermore, by reversing the winding shaft 18, the motor lead wire 17 inside the cord cover 21 is returned to the state at the start of winding from FIG. 4B to FIG. It is processed.

As described above, the configuration is such that the cord cover 21 is provided on the winding shaft 18 of the fan motor 12, and the stopper 25 is further provided within this cover.
The fan motor 12 can be easily attached to the frame 11, and its assembly is also easy. Furthermore, wiring the motor lead wire 17 is easy,
Since the movement of the cord is restricted within the cord cover 21, safety is also high. Furthermore, since the motor lead wire 17 is wound around the small-diameter winding shaft 18 within the cord cover 21, the loss of rotational torque of the stator 14 that accompanies the winding can be reduced.

(F) Effects of the invention This invention provides a shutter string for opening the shutter on a rotatable stator and a winding shaft for winding the lead wire extending from the stator, and further attaches a specific lead wire cover to the winding shaft. The lead wire itself can be protected by winding the lead wire inside this cover when the shutter is open, and by storing the slack of the lead wire inside this cover when the shutter is closed. This is to prevent rotation from being inhibited.

[Brief description of the drawings]

Figure 1 is a longitudinal sectional view showing the ventilation fan according to this invention, Figure 2 is a sectional view of the main part of its motor, Figure 3 is its perspective view, and Figures 4 A and 4 are windings of the motor lead wire. An explanatory diagram illustrating the state, A shows the time when the winding is started, and B shows the time when the winding is completed. 1... Ventilation fan, 2... Ventilation fan body, 3... Shutter, 4... Shutter wire, 7... Fan, 12... Fan motor, 14... Stator, 1
5...Rotor, 17...Motor lead wire, 18...
... Winding shaft, 21 ... Cord cover, 25 ... Stopper.

Claims (1)

[Scope of utility model registration request] A shutter that closes the opening at one end of the ventilation door body, a shutter string that opens and closes the shutter, a fan and its fan motor, and the fan motor is placed in the center of the body so that the fan is located at the other end of the ventilation door body. The stator of the fan motor is rotatably installed on the frame, and the stator is provided with a lead wire coaxially protruding toward the shutter side and extending from the stator, and a lead wire extending from the stator on the shutter side from the lead wire. A pair of collar-shaped lead wire covers are provided, each having a winding shaft for winding the string, and facing the lead wire winding portion of the winding shaft at a predetermined interval to accommodate a slack portion of the lead wire. A ventilation fan with a panel.