JP2538003Y2 - Duct ventilation fan - Google Patents

Description

[Detailed description of the invention] [Purpose of the invention] (Industrial application field) The present invention relates to a ventilation fan for a duct having an improved structure for connecting a lead wire of a motor for driving a fan and a power supply line.

(Prior Art) FIG. 10 shows a conventional configuration for connecting a motor lead wire and a power supply wire in a duct ventilation fan. That is, the electrical component storage part 3 is formed by attaching the L-shaped mounting plate 2 to the upper corner in the outer box 1, and the opening 4 facing the electrical component storage part 3 is formed at the corner of the outer box 1.
Is formed, and a connection terminal 6 to which a lead wire 5a of a motor 5 for driving a fan is connected and a capacitor 7 are stored in the electrical component storage section 3. Then, the power supply line 8 wired behind the ceiling is connected to the connection terminal 6 through the opening 4 of the outer box 1, and the cover 9 is screwed to the outer surface of the outer box 1 so as to close the opening 4. Has become.

(Problem to be Solved by the Invention) In the above-described conventional configuration, the power supply line 8 is connected to the connection terminal 6 when the ventilation fan for the duct is mounted.
The work of removing the cover 9 and connecting the power supply line 8 to the connection terminal 6 and then attaching the cover 9 again has to be performed, and the workability is poor. When the power line 8 is disconnected from the connection terminal 6 for repair, inspection, or the like,
Again, the power supply line 8 must be removed from the connection terminal 6 after removing the cover 9 behind the ceiling, and in this case also, the workability is poor.

Accordingly, an object of the present invention is to provide a ventilation fan for a duct that can easily connect and disconnect a power supply line to and from a connection terminal.

[Configuration of the Invention] (Means for Solving the Problems) The ventilation fan for a duct of the present invention has a motor and a motor provided in an outer box which is open at the lower surface and is inserted into a mounting opening of a ceiling. A fan to be driven is provided, and a plastic fan casing is provided so as to surround the fan. In the outer periphery of the fan casing, an electric component storage portion having an opening on a lower surface is integrally formed, and a motor housing is provided. A connection terminal having a connection portion for connecting a lead wire to a power supply line is stored in the electrical component storage portion with the connection portion facing the opening, and a lower surface opening of the connection terminal is provided in the electrical component storage portion. A lid for opening and closing the unit is rotatably connected, and the lid is provided with a convex portion for receiving the connection terminal facing the opening of the electrical component storage unit from below when the lid is open. Having the features the time.

(Operation) According to the above-described means, the connection and disconnection of the power supply line to and from the connection terminal can be performed through the opening on the lower surface of the outer box on the indoor side.

In addition, a convex portion is provided on a lid rotatably connected to the electrical component storage section, and when the lid is opened, the connection terminal is received by the convex portion of the lid, so that the connection terminal is dropped. Can be prevented.

(Embodiment) Hereinafter, a first embodiment of the present invention will be described with reference to FIGS.

First, in FIG. 1 showing a mounting state of a duct ventilation fan, an outer box 11 is formed in a rectangular box shape having an opening 12 on a lower surface, and is inserted and placed in a mounting opening 14 formed in a ceiling 13. The lower end flange 11a is attached to the ridge 15 of the ceiling 13 by, for example, screwing. The motor 16 is mounted on the motor mounting plate 17 in the outer case 11, and its rotating shaft 16a protrudes downward through the motor mounting plate 17, and a fan 18 is attached to the tip thereof. Have been.
The plastic fan casing 19 is attached to the outer case 11 with screws 20 together with the motor mounting plate 17 so as to surround the fan 18. The fan casing 19 has an intake port 21 formed on the lower surface and a third port on the side surface.
As shown in the figure, an air outlet 22 is formed,
The 22 is connected to a duct (not shown) disposed behind the ceiling via an exhaust port (not shown) formed on the side surface of the outer box 11.

As shown in FIGS. 2 to 4, an electrical component housing 24 having an opening 23 on the lower surface is integrally formed with the outer peripheral portion of the lower portion of the fan casing 19. The electrical component storage section 24 is internally partitioned into two chambers by a partition wall 25, and one of the first storage sections 24a has a capacitor 26 therein.
The connection terminal 27 having the connection portion 27a is stored in the other second storage portion 24b in a downward state so that the connection portion 27a faces the opening 23. A pair of lead wires 16b of the motor 16 is led out to the electrical component storage unit 24, and one of them is connected to the connection terminal 27 via the capacitor 26, and the other is directly connected to the connection terminal 27 (not shown). doing. A first lid 28 is integrally formed with a side portion of the electrical component storage portion 24 via a self-hinge 28a and rotatably connected to the first lid portion 28, and is connected to a side portion of the first lid portion 28. The second lid 29 is integrally formed via a self-hinge 29a. The first lid 28 is attached to the mounting part 30 formed at the end of the first lid 28 by a boss formed at the side of the electrical component storage part 24.
The first storage portion 24a is fixed to the first storage portion 24 by a screw 32.
Is to be closed. The second lid portion 29 has a protruding piece 33a projecting toward the inner surface of the second lid portion 29 at an end opposite to the self-hinge 29, and has a protruding portion. An engagement claw 33 is protruded from the piece 33a, and is engaged with an engagement hole 34 formed in a side surface of the electrical component storage portion 24.
, The second lid portion 29 is moved to the second storage portion.
24b is to be closed. In this case, the protruding piece 33a and the engagement claw 33 form a convex portion that receives the connection terminal 27 when the second lid 29 is open, as described later.
A notch 35 for guiding the lead 16b of the motor 16 and the lead of the capacitor 26 is formed in the partition wall 25,
A cut-out portion 36 for guiding a power line is formed on a side wall of the second storage portion 24b.

On the other hand, a pair of power lines 37 wired above the ceiling
Is inserted into the outer box 11 through the bushing 38 from the ceiling surface of the electrical component storage section while being inserted into the cutout 36.
24, is inserted and connected to the connection portion 27a of the connection terminal 27.

Reference numeral 39 denotes a decorative grill which is disposed so as to cover the opening 12 of the outer box 11 from below, and is detachably mounted via a spring 41 to a support 40 integrally formed with the fan casing 19.

Thus, in the above configuration, in order to connect the power supply line 37 to the connection terminal 27, the power supply line 37 is inserted into the outer case 11 via the bushing 38 before the decorative grill 39 is attached.
Then, the engaging claw 33 of the second lid portion 29 is removed from the engaging hole 34 from the indoor side, and the second lid portion 29 is rotated via the self hinge 29a to open the lower surface of the second storage portion 24b. Let it. At this time, in a state where the second lid portion 29 is opened at an angle of approximately 90 degrees or less, the protruding piece 33a and the engaging claw 33 face the opening 23 of the second storage portion 24b from below. , These protruding pieces 33a
Further, the connection terminal 27 stored in the second storage portion 24b can be received by the engagement claw 33, so that the connection terminal 27 can be prevented from falling off as much as possible. With the second lid 29 opened as described above, the power supply line 37 is inserted into and connected to the connection portion 27a of the connection terminal 27, and then the engagement claw 33 is engaged with the engagement hole 34. The second lid 29 is closed.

On the other hand, when the power supply line 37 is disconnected from the connection terminal 27 for repair, inspection, or the like, with the decorative grille 39 removed, the engaging claw 33 of the second lid portion 29 is inserted into the engaging hole 34 from the indoor side. Then, the second lid 29 may be opened, and the power line 37 may be disconnected from the connection terminal 27 in this state. Also in this case, the protruding piece 33a and the engaging claw 33 of the second lid portion 29 can prevent the connection terminal 27 from falling off as much as possible.

In the above-described embodiment, the second lid portion 29 is configured to be fixed by the engagement between the engagement claw 33 and the engagement hole 34, but the fixing may be performed by screwing.

Next, a second embodiment of the present invention will be described with reference to FIGS.

First, in FIGS. 5 and 6, the outer box 51 has a rectangular box shape having an opening 52 on the lower surface, and is disposed in a state of being inserted into a mounting opening 54 formed in a ceiling 53, and a flange 51 at a lower end is provided.
a is screwed to the wooden frame 56 together with the connection plate 55. The motor 57 is screwed into the outer case 57 with its upper part protruding from the outer case 51, and a fan 58 is attached to a rotating shaft 57a. A plastic fan casing 59 is screwed into the outer case 51 so as to surround the fan 58.
In the fan casing 59, an intake port 60 is formed on a lower surface, and an exhaust port 61 is formed on a side surface. The air outlet 61 is communicated with a connection port 55a of the connection plate 55 through an exhaust port 51b of the outer case 51, and the connection port 55a is provided with a duct 62 piped behind the ceiling.
Is connected.

As shown in FIG. 7, an electrical component storage portion 64 having an opening 63 on the lower surface is integrally formed with the outer peripheral portion of the lower portion of the fan casing 59.
Are formed with a plurality of ribs 65 on the inner surface thereof. A lid 66 for opening and closing the opening 63 is integrally formed at a lower end portion of the electrical component storage portion 64 on the inner surface side of the outer box 51 via, for example, a self-hinge 66a. Is rotatably connected to the electrical component storage section 64 via a self-hinge 66a. The lid 66 can be freely opened outward before the fan casing 59 is assembled into the outer box 51 (see FIG. 7), but when the fan casing 59 is assembled into the outer box 51, FIG. Outer box 51 as shown by the two-dot chain line
The opening 67 can be opened only to the lower side (approximately 90 degrees) by the inner surface of the opening 63. In this open state, the convex portion 67 formed at the center of the inner surface faces the opening 63 from below. In addition, the lid 66 is configured such that a mounting portion 66b formed at an end portion is fixed to a boss portion 68 formed on a side portion of the electrical component storage portion 64 by a screw 69.

In the electrical component storage portion 64, a connection terminal 70 to which a lead wire 57b of the motor 57 is connected in advance is stored with the connection portion 70a facing downward. A release button 71 is provided at a lower portion of the side surface of the connection terminal 70. In this case, before connecting the fan casing 59 to the outer box 51, the connection terminal 70 is housed by inserting the connection terminal 70 into the electrical component housing 64 with the lid 66 opened outward as shown in FIG. Like that.

On the other hand, the power supply line 72 wired behind the ceiling is inserted into the outer case 51 from the ceiling surface of the outer case 51 via the bushing 73, and is connected to the connection terminal 70 housed in the electric component housing 64. It is inserted and connected to the part 70a.

Numeral 74 denotes a decorative grill which is disposed so as to cover the opening 52 of the outer box 51 from below, and is detachably mounted via a spring 76 to a support 75 integrally formed with the fan casing 59.

Thus, in the above configuration, in order to connect the power supply line 72 to the connection terminal 70, the power supply line 72 is inserted into the outer case 51 via the bushing 73 before the decorative grille 74 is attached.
At this time, the connection terminal 70 is stored in the electrical component storage section 64 in advance, and the cover 66 is closed by the screw 69.
Then, the screw 69 of the lid 66 is removed from the indoor side, and the lid 66 is rotated downward through the self-hinge 66a to be opened. At this time, the lid 66 is restricted by the inner surface of the outer box 51 and can be opened only up to approximately 90 degrees. In this state, when the connection terminal 70 housed in the electrical component housing portion 64 is pulled out, the connection terminal 70 is received by the projection 67 of the lid 66 as shown in FIG.
There is no risk that 70 will fall off. When the power supply line 72 is inserted into the connection portion 70a of the connection terminal 70 with the connection terminal 70 pulled out in this way, the power supply line 72 is held by a holding mechanism (not shown) inside the connection terminal 70. At this time, when confirming the insertion of the power supply line 72, the power supply line 72 is pulled, but at this time, since the connection terminal 70 is received by the projection 67, the connection terminal 70 does not jump out, Also, connection terminal 70
The pulling force does not act on the lead wire 57b of the motor 57 to which is connected. After connecting the power supply line 72 to the connection terminal 70 in this manner, the connection terminal 70 is pushed into the electrical component storage section 64,
The lid 66 is closed and fixed with the screw 69.

On the other hand, when the power supply line 72 is disconnected from the connection terminal 70 for repair or inspection, the screw 69 of the cover 66 is removed from the indoor side with the decorative grille 74 removed, and the cover 66 is opened to open the connection terminal. 70
Is pulled out until it comes into contact with the convex portion 67 of the lid 66. Again,
Since the connection terminal 70 is received by the projection 67, there is no danger of falling off. In this state, for example, as shown in FIG.
Press and pull the power line 72 to connect the power line 72
Can be withdrawn from 70a.

According to the second embodiment, as in the first embodiment, since the connection and disconnection of the power supply line 72 to and from the connection terminal 70 can be performed from the indoor side, the work can be easily performed. It is. In addition, a convex portion 67 is provided on the inner surface of a lid 66 that opens and closes the opening 63 of the electrical component storage portion 64,
Since the connection terminal 70 is received by the convex portion 67 when the lid 66 is open, the connection terminal 70 can be opened even when the lid 66 is opened.
There is no risk of the 70 being dropped off, and the operations of connecting, removing and inserting the power supply line 72 can be performed more easily. In addition, since the connection terminal 70 is received by the projection 67 and is not further pulled out, the connection terminal 70
Excessive tension does not act on the lead wire 57b of the motor 57 to which the 70 is connected, and there is no risk of disconnection or the like.

[Effects of the Invention] As is clear from the above description, the present invention has the following effects.

According to the ventilation fan for a duct of the present invention, the electrical component storage portion is integrally formed on the outer peripheral portion of the plastic fan casing, the connection terminal is stored in the electrical component storage portion, and the power supply line is connected to the connection terminal. Since the power supply line is detached from the indoor side, the operation of connecting and disconnecting the power supply line to and from the connection terminal can be easily performed.

Furthermore, a convex portion is provided on the lid that opens and closes the lower surface opening of the electrical component storage unit, and the connection terminal is received by the convex portion when the lid is open, so that the connection terminal falls off even when the lid is opened. Can be prevented as much as possible,
The operations of connecting, removing, and confirming the insertion of the power supply line can be performed more easily. In addition, since the connection terminal is received by the convex portion and is not further drawn out, it is possible to prevent excessive tension from acting on the lead wire of the motor to which the connection terminal is connected, and to prevent disconnection as much as possible. be able to.

[Brief description of the drawings]

1 to 4 show a first embodiment of the present invention, FIG. 1 is a longitudinal sectional view of an attached state, FIG. 2 is a perspective view of a main part, FIG. 3 is a bottom view of the same part, FIG. FIG. 4 is a side view of the same part. Also,
5 to 9 show a second embodiment of the present invention. FIG. 5 is a longitudinal sectional view of an attached state, FIG. 6 is an exploded perspective view, and FIG. FIG. 8 is a longitudinal sectional view of a main part in a state where connection terminals are stored in an electrical component storage part, and FIG. 9 is a perspective view of a main part in a state where connection terminals are slightly pulled out. FIG. FIG. 10 is a diagram corresponding to FIG. 1 showing a conventional configuration. In the drawing, 11 is an outer box, 12 is an opening, 13 is a ceiling, 14 is a mounting opening, 16 is a motor, 16b is a lead wire, 18 is a fan, 19
Is a fan casing, 23 is an opening, 24 is an electrical component storage section,
26 is a capacitor, 27 is a connection terminal, 27a is a connection part, 28 is a first lid (lid), 29 is a second lid (lid), 33 is an engagement claw (convex), and 33a is a protruding piece. (Projecting portion), 37 is a power supply line, 51 is an outer box, 52 is an opening, 53 is a ceiling, 54 is a mounting opening, 57 is a motor, 57b is a lead wire, 58 is a fan, 59 is a fan casing, 63 Denotes an opening, 64 denotes an electrical component storage portion, 66 denotes a lid, 66a denotes a self-hinge, 67 denotes a convex portion, 70 denotes a connection terminal, 70a denotes a connection portion, and 72 denotes a power supply line.

Claims (1)

(57) [Scope of request for utility model registration] 1. An outer box arranged in a state of being inserted into a mounting opening of a ceiling and having a lower surface opened, a motor provided in the outer box and a fan driven by the motor; A plastic fan casing provided so as to surround the fan; an electric component storage unit integrally formed so as to have an opening at a lower surface in an outer peripheral portion of the fan casing; and a power line connected to a lead wire of the motor. A connection terminal having a connection portion for connecting to the electrical component storage portion, the connection portion being stored in a state where the connection portion faces the opening, and the electrical component storage portion opening and closing the opening thereof. For a duct, comprising: a lid rotatably connected to the lid; and a projection provided on the lid and facing the opening of the electrical component storage unit from below in a state where the lid is open to receive the connection terminal. Ventilation fan.