JPH06180136A - Ceiling ventilation fan - Google Patents

Abstract

(57) [Abstract] [Purpose] The sensor is held at a predetermined position with respect to the decorative frame without adjusting the mounting position of the sensor according to the size of the ceiling plate. [Structure] A main body case 24 is arranged on the ceiling 23 of the room 21, and a blower unit 30 including a fan casing 27, a motor 28, an impeller 29, and the like is arranged inside the main body case 24. Further, a holder 33 having a flange portion 34b is provided on a mounting frame 32 provided on the fan casing 27 so as to be vertically movable, and a human sensor 38 is attached to the holder 33.
When the decorative frame 40 is attached so as to cover the opening 22a of the ceiling plate 22, the receiving portion 40a of the decorative frame 40 causes
The collar portion 34b of the holder 33 is received and supported.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ceiling ventilation fan provided behind the ceiling of a room provided with a sensor such as a human sensor for detecting the situation in the room.

[0002]

2. Description of the Related Art FIG. 22 shows the conventional structure of this type of ceiling ventilation fan.
It will be described based on. A main body case 3 is arranged in the ceiling 2 of the room 1. A suction port 3a corresponding to the opening 4a of the ceiling plate 4 is formed on the lower surface of the main body case 3, a discharge port 3b is formed on the side surface, and a fan casing 5a, a motor 5b, a blade are provided inside. A blower unit 5 including a car 5c is arranged.

The fan casing 5a of the blower unit 5 is provided with a mounting frame 6. The sliding portion 7a of the holder 7 is attached to the mounting frame 6 with screws 8.
The holder 7 can be moved up and down along the vertically long hole 7b by loosening the screw 8. A human sensor 9 is provided at the lower end of the holder 7, and a decorative frame 10 is provided on the main body case 3 from the room 1 side so as to cover the opening 4a via a spring 11. 10 is a motion sensor 9
Is provided with a hole 10a.

When the human sensor 9 detects that there is a person in the room 1, the motor 5b is automatically energized, and the air in the room 1 is supplied to the main body case 3 by the impeller 5c.
Is sucked into the fan casing 5a from the suction port 3a of
It is discharged from the discharge port 3b.

[0005]

In the above-mentioned conventional configuration, since the blower unit 5 is provided with the human sensor 9, when the ceiling plate 4 has a different thickness t, the human sensor 9 is higher than the decorative frame 10. If the height position is different and the height position shifts upward, for example, the peripheral area of the hole 10a causes a problem such that the sensing area of the human sensor 9 is reduced. Therefore, when installing the ventilation fan for the ceiling, it is necessary to adjust the height position of the human sensor 9 with respect to the decorative frame 10.

However, in the above conventional structure,
In order to adjust the height position of the human sensor 9 with respect to the decorative frame 10, it is necessary to loosen the screw 8 to move the sliding portion 7a of the holder 7 up and down along the hole 7b, and the adjustment work is not only troublesome. Or, since this troublesome work needs to be performed at a high place using a stepladder or the like, it is dangerous.

Therefore, in the conventional art, as shown in FIG. 23, the holder 12 incorporating the human sensor 9 is attached to the decorative frame 10.
There is provided a device in which the work of adjusting the height position of the human detection sensor 9 is abolished by fixing it to the hole 10b. However, in this case, when it becomes necessary to remove the decorative frame 10 for cleaning the inside of the main body case 3 or the like, the lead wire 9a of the human sensor 9 interferes with the removal of the decorative frame 10.

The present invention has been made in view of the above circumstances, and an object of the present invention is to always keep the sensor in a predetermined position with respect to the decorative frame without adjusting the mounting position of the sensor according to the size of the ceiling plate. (EN) It is possible to provide a ceiling ventilation fan that can be held in a position and that does not hinder the work of removing the decorative frame.

[0009]

In order to achieve the above object, a ceiling ventilation fan according to claim 1 is provided on the back of a room with a suction port corresponding to an opening of a ceiling plate. A body case having a discharge port on a side surface, a blower unit disposed inside the main body case for sucking air in the room from the suction port and discharging the air from the discharge port, and the ceiling plate from the room side A decorative frame having a receiving portion that is provided so as to cover the opening of the holder, a holder that is vertically movable in the blower unit, a sensor that is provided in the holder to detect a situation in the room, and the holder. The positioning unit is provided and holds the sensor at a predetermined position with respect to the decorative frame by being received and supported by the receiving unit of the decorative frame.

In this case, the locking plate portion and the guide hole portion are provided in the blower unit, and the holder is constituted by the holder main body and the sliding portion fitted in the guide hole portion so as to be movable up and down. A compression coil spring that biases the locking plate is provided between the locking plate and the holder main body, and is engaged with the locking plate to prevent the sliding part from falling off the guide hole. It is preferable to provide an engaging portion on the sliding portion (claim 2).

Alternatively, a holder is composed of a holder main body and a sliding portion protruding from the holder main body, and the sliding portion is engaged with the holder main body to move the sliding portion up and down and rotate within a predetermined angle range. An allowable guide hole portion is provided on the blower unit, and a locked portion is provided on the slide portion that engages with the blower unit and prevents the sliding portion from falling off the guide hole portion. By engaging with the locked portion within the range, the sliding portion is regulated to the first rotation position and the second rotation position, and the first portion of the sliding portion moves as the holder rises. 1
The blower unit may be provided with a restricting protrusion that allows the rotation of the air supply unit and the second rotation position.

Alternatively, a holder is provided on the blower unit so as to be vertically movable and rotatable at a plurality of positions, and a power switch is provided on a side surface of the holder, and the power switch corresponds to each rotary position of the holder. As described above, a plurality of openings for intake and power switch operation are provided in the decorative frame (Claim 4), or an inclined surface portion is provided in the lower portion of the holder, and the inclined surface portion is brought into contact with the holder so that the holder has a predetermined shape. A slanted guide portion for guiding to the position may be provided on the decorative frame (claim 5).

In the invention according to claim 1 or 2, the holder is provided on the blower unit so as to be vertically movable and rotatable, one of the holder and the decorative frame is provided with a convex portion, and the other is provided with: It is preferable to provide a plurality of recesses that are fitted with the protrusions and that regulate the rotational position of the holder (claim 6).

According to a seventh aspect of the present invention, there is provided a ceiling ventilation fan, wherein a main body case is provided in the back of a room and has a suction port corresponding to an opening of a ceiling plate on a lower surface and a discharge port on a side surface, and the main body case. A blower unit which is disposed inside the room and sucks the air in the room from the suction port and discharges the air from the discharge port; and a makeup unit having a receiving portion which is provided so as to cover the opening of the ceiling plate from the room side. A frame, a sliding portion that is vertically movable and non-rotatably provided on the blower unit, and has two engaging convex portions arranged at a pitch of approximately 90 degrees, and a sliding portion that is rotatably provided on the sliding portion. A holder composed of a holder main body having an engagement pin that is engaged with the engagement convex portion, and both ends are attached to the holder main body and the sliding portion, and the engagement pin is selected as the two engagement convex portions. Springs that are abutted against each other and the holder body A sensor that is provided and detects the situation in the room, and a positioning portion that is provided in the holder body and supported by a receiving portion of the decorative frame to hold the sensor at a predetermined position with respect to the decorative frame. It is equipped with.

[0015]

According to the means described in claim 1, when the decorative frame is lifted so as to cover the opening of the ceiling plate, the positioning part of the holder is pushed up by the receiving part of the decorative frame and the holder slides upward. To do. Then, when the decorative frame is fixed, the positioning part of the holder is received and supported by the receiving part of the decorative frame, so that the sensor provided in the holder is always irrespective of the size of the ceiling plate. It is held in place with respect to the makeup frame.

According to the means of claim 2, the holder is
Since it is biased downward by the compression coil spring, it can smoothly slide downward. As a result, the positioning portion of the holder is surely received and supported by the receiving portion of the decorative frame, so that the sensor provided in the holder can be reliably retained at the predetermined position with respect to the decorative frame. Moreover, since the sliding portion of the holder is provided with the locked portion that engages with the locking plate portion of the blower unit, the sliding portion will not fall off due to the spring force of the compression coil spring. .

According to the third aspect of the present invention, the rotation position of the holder is changed by pushing up the holder and rotating the holder.
It can be changed to the first rotation position and the second rotation position. Therefore, when the sensing area of the sensor is, for example, an elliptical shape, the rotational position of the sensor can be appropriately changed so that an undetectable dead space does not occur in the room.

According to the means described in claim 4, even when the holder is rotated, the power switch can be operated from the opening of the decorative frame with the decorative frame attached. Claim 5
According to the described means, when the decorative frame is lifted so as to cover the opening of the ceiling plate, the guide portion of the decorative frame comes into contact with the inclined surface portion of the holder, and the inclined surface portion guides the guide portion.
It becomes easy to arrange the holder at a predetermined position of the decorative frame surrounded by the inclined surface portion.

According to the means described in claim 6, the rotational position of the holder can be regulated by rotating the holder to fit the convex portion and the concave portion. Therefore, when the sensing area of the sensor is, for example, an elliptical shape, the rotational position of the sensor can be appropriately changed so that an undetectable dead space does not occur in the room.

According to the means described in claim 7, when the holder body is pushed upward, the sliding portion slides upward and the holder body moves upward. Then, when the holder main body is rotated in this state, when the dead center of the spring force of the toggle spring is passed, the holder automatically rotates in the rotation direction, and the engagement pin of the holder main body Selectively abutted on either of the two engaging protrusions of the sliding portion arranged at a 90 degree pitch,
The rotation position of the holder is changed by 90 degrees. Therefore, when the sensing area of the sensor is, for example, an elliptical shape, the rotational position of the sensor can be easily changed by 90 degrees so that an undetectable dead space does not occur in the room.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS.
It will be described based on. First, in FIG. 1 and FIG.
An opening 22a is formed in the ceiling plate 22 of the room 21, and a main body case 24 is attached to the peripheral edge of the opening 22a via a mounting frame 22b. Body case 2
A suction port 24a corresponding to the opening 22a of the ceiling plate 22 is formed on the lower surface of No. 4, and a discharge port 24b is formed on the side surface. A connection pipe 25 having a wind pressure release type shutter 25a is attached to the periphery of the discharge port 24b, and the duct 2 led out to the outside is attached to the connection pipe 25.
6 is connected.

A blower unit 30 including a fan casing 27, a motor 28, and an impeller 29 is disposed inside the main body case 24. The motor 28 is attached to the motor attachment frame 31, and the fan casing 27 is attached.
Is an opening 27 corresponding to the suction port 24a of the body case 24.
It has an opening 27b corresponding to a and the discharge port 24b.

A mounting frame 32 is provided on the fan casing 27 of the blower unit 30. As shown in FIG. 3, the mounting frame 32 has elongated guide holes 32a,
The rectangular portion 32a formed between the guide hole portions 32a and 32a has a thin plate shape as shown in FIG. 4, and functions as a locking plate portion 32b as described later.

A holder 33 is provided on the mounting frame 32 so as to be vertically movable. That is, the holder 33 is the holder body 3
4 and a sliding portion 35 protruding from the holder main body 34. The holder main body 34 has a rectangular box shape with an open lower surface, and has a window portion 34a in the lower surface opening.
The sliding portion 35 is provided in the holder main body 33 and is located on the base end side. The rectangular tubular housing portion 35a and the guide hole portions 32a, 32a.
It is composed of plate-shaped wall portions 35b, 35b that are vertically movable. A flange portion 34b serving as a positioning portion having a rectangular plate shape is provided on the peripheral edge of the holder main body 34, and claw portions serving as locked portions are provided at the tips of the wall portions 35b and 35b of the sliding portion 35. 35c and 35c are provided.

A compression coil spring 36 is accommodated in the accommodating portion 35a of the sliding portion 35, and the compression coil spring 36 is
It is located between the locking plate portion 32b and the holder body 34 and urges the holder 33 downward. Then, as shown in FIG. 5, the claw portions 35c, 35c of the sliding portion 35 engage with the locking plate portion 32b of the mounting frame 32, so that the sliding portion 35 falls off from the guide hole portions 32a, 32a. To prevent that.

A board 37 is attached to the holder body 34, and a human sensor 38 as a sensor for detecting the situation in the room 21 is mounted on the board 37.
The human sensor 38 is a so-called pyroelectric sensor, and is configured to detect a change in infrared rays generated by a person when a person is present within a predetermined sensing area and generate a detection signal. The lead wire 38a led out from the motion sensor 38 is connected to the control unit 39 as shown in FIG. 1. When a detection signal is generated in the motion sensor 38, the control unit 39 energizes the motor 28. To do.

As shown in FIGS. 1 and 2, a decorative frame 40 is attached to the main body case 24 so as to cover the opening 22a of the ceiling plate 22 from the room 21 side. That is, the makeup frame 4
As shown in FIG. 4, 0 indicates the collar portion 34b of the holder body 34.
The receiving portion 40a for receiving and supporting the window portion 34a of the holder 33
Has a lead-out hole 40b for leading out air and a plurality of openings 40c for sucking air in the room 21. And the makeup frame 40
As shown in FIGS. 1 and 2, springs 41, 41 are attached to both sides of the spring 41, 4 respectively.
1 is attached to the holes 42a, 42a of the mounting plates 42, 42 provided in the main body case 24, and thus the decorative frame 40
Is attached to the main body case 24.

Further, when the decorative frame 40 is mounted on the main body case 24, the springs 41, 41 are designed to have a spring force in the expanding direction (the direction of arrow A in FIG. 2). The decorative frame 40 is lifted up and pressed against the ceiling plate 22 by its spring force. In this case, the spring force of the compression coil spring 36 is equal to that of the spring 4
It is set to be smaller than the upward spring force due to the expanding force of 1, 41, so that no gap is created between the decorative frame 40 and the ceiling plate 22.

Next, the procedure for attaching the decorative frame 40 to the main body case 24 will be described. First, in FIG. 5, in the state where the decorative frame 40 is not attached to the main body case 24,
The holder body 34 is pressed by the spring force of the compression coil spring 36, and the holder 33 is in a state of protruding downward from the predetermined position shown in FIG.

In this state, when the decorative frame 40 is lifted so as to cover the opening 22a of the ceiling plate 22, the receiving portion 40a of the decorative frame 40 pushes up the collar portion 34b of the holder 33,
The sliding portion 35 of the holder 33 is connected to the guide hole 32 of the mounting frame 32.
It slides upward along a and 32a. And the makeup frame 4
When 0 is fixed, the collar portion 34b of the holder 33 is received and supported by the receiving portion 40a of the decorative frame 40. Therefore, the motion sensor 38 provided in the holder 33 is provided in the outlet hole 40b of the decorative frame 40. It is held at a predetermined position facing the room 21 through the window portion 34a of the holder 33 which is led out from the room 21 to the room 21.

Next, the operation of the above configuration will be described. When a person is present within the sensing area of the motion sensor 38, the motion of the person causes a detection signal to be generated in the motion sensor 38. Then, the control unit 39 detects the detection signal and energizes the motor 28, so that the air in the room 21 is changed to the decorative frame 40.
The air is sucked into the fan casing 27 through the opening 40c and the suction port 24a of the main body case 24 through the opening 27a of the fan casing 27. Then, the air is discharged from the opening 27b of the fan casing 27 and the discharge port 24b of the main body case 24, and is discharged to the outside through the duct 26 while opening the shutter 25a as shown by the chain double-dashed line.

According to the first embodiment described above, the following effects can be obtained. Since the holder 33 is provided on the mounting frame 32 so as to be movable up and down, and the holder 33 is provided with the flange portion 34b that is received and supported by the receiving portion 40a of the decorative frame 40, the main body case 24 is provided with the decorative frame 40.
Is fixed, the holder 3 is attached to the receiving portion 40a of the decorative frame 40.
The collar portion 34b of No. 3 is received and supported. As a result, the human sensor 38 provided in the holder 33 does not need to be adjusted in the mounting position according to the size of the ceiling plate 22.
It is always held at a predetermined position with respect to the decorative frame 40.

Therefore, unlike the conventional case in which the position of the motion sensor is adjusted by loosening the screw and moving the holder up and down, it is not necessary to perform a troublesome adjustment work, and accordingly, in a high place. Since work time can be reduced, work safety is also improved. Moreover, since the motion sensor 38 is provided on the mounting frame 32, the lead wire 38a of the motion sensor 38 interferes with the removal of the decorative frame 40, unlike the conventional case in which the motion sensor is fixed to the decorative frame. Never be.

In the first embodiment, the mounting frame 32 is provided with the locking plate portion 32b, and the locking plate portion 32b and the holder main body 3 are provided.
Since the holder 33 is biased downward by providing the compression coil spring 36 with the holder 4, the holder 33 can smoothly slide downward by the compression coil spring 36.

As a result, the collar portion 34b of the holder 33 is surely received and supported by the receiving portion 40a of the decorative frame 40, so that the human sensor 3 provided in the holder 33 is provided.
8 can be reliably held at a predetermined position with respect to the decorative frame 40. Moreover, the sliding portion 35 of the holder 33 is
Since the claw portion 35c that engages with the locking plate portion 32b of the mounting frame 32 is provided, the sliding portion 35 does not fall off due to the spring force of the compression coil spring 36.

In this case, since the spring force of the compression coil spring 36 is set to be smaller than the upward spring force due to the expanding force of the springs 41, 41, the spring force between the decorative frame 40 and the ceiling plate 22 is small. There is no gap.

Although the compression coil spring 36 is provided between the locking plate portion 32b and the holder main body 34 in the first embodiment, the compression coil spring 36 may be provided as required. The holder 33 may be received and supported by the receiving portion 40a of the decorative frame 40 by its own weight.

Next, a second embodiment of the present invention will be described with reference to FIGS. The difference between the first embodiment and the second embodiment is mainly in the holder 43 portion. Therefore, the same parts as those in the first embodiment will be described with reference to FIGS. 1 to 4, and the description thereof will be omitted.

First, referring to FIGS. 6 and 7, the holder 4
3 is composed of a holder body 44 in the form of a short cylinder whose upper surface is closed, and a sliding portion 45. And the holder body 4
On the upper surface of 4, the short cylindrical fitting portion 44a and the engagement pin 46
And a pin 47 are provided, and the outer peripheral surface of the fitting portion 44a is
A guide protrusion 44b is provided. Also, the holder body 4
The lower end surface of 4 has a collar portion 4 serving as an annular positioning portion.
4c is provided, and a window portion 44d is provided at the lower surface opening. A human sensor 49 is provided on the holder main body 43 via a substrate 48, and a sensing area of the human sensor 49 has a substantially oval shape, as shown by hatching in FIGS. 8 and 9. ing.

On the other hand, the sliding portion 45 has a cylindrical accommodating portion 45a in which the compression coil spring 36 is accommodated, on the base end side thereof, and in this accommodating portion 45a, the guide hole portion 32 of the mounting frame 32 is provided.
a, 32a (see FIG. 3) are provided with plate-shaped wall portions (not shown) that are vertically movable, and the locking plate portions 32c of the mounting frame 32 (see FIG. 4) are provided in these wall portions. A claw portion (not shown) is provided to prevent the sliding portion 45 from coming off from the guide hole portions 32a, 32a by engaging with.

The accommodating portion 45a of the sliding portion 45 is formed with a guide concave portion 45b which is fitted into the guide convex portion 44b of the holder body 44. Therefore, the holder main body 44 has the sliding portion 45.
The slide part 45 is vertically movable integrally with the holder body 44 and is non-rotatable. Further, on the base end side of the sliding portion 45, two engaging convex portions 50, 50 arranged at a pitch of approximately 90 degrees and a hook 51 having a substantially L shape are provided. A toggle spring 52 is provided between the pin 47 and the pin 47 of the holder body 44.

The decorative frame 53 has a circular lead-out hole 53a corresponding to the cylindrical holder main body 44 and a plurality of openings 53b. The peripheral edge of the lead-out hole 53a has a flange portion 44c of the holder 43. It functions as a receiving portion 53c that receives and supports the receiving.

When the holder 43 is pushed up from the lead-out hole 53a of the decorative frame 53, the sliding portion 45 slides upward and moves upward together with the holder main body 44. Then, when the holder main body 44 is rotated in this state, the toggle spring 52
When the dead point of the spring force of is passed, the holder main body 44 automatically rotates in the rotation direction, and the engaging convex portion 5 of the sliding portion 45 is rotated.
The engaging pin 46 of the holder main body 44 is brought into contact with 0, and the rotational position of the holder main body 44 is changed by 90 degrees.

According to the second embodiment, when the decorative frame 53 is fixed, as in the first embodiment, the receiving portion 5 of the decorative frame 53 is received.
Since the collar portion 44c of the holder 43 is received and supported by the 3c, the human presence sensor 49 can always be held at a predetermined position with respect to the decorative frame 53 without fear of interfering with the removal work of the decorative frame 53. . Further, since the holder 43 is smoothly slid downward by the compression coil spring 36, the human sensor 49 can be reliably held at a predetermined position with respect to the decorative frame 53. Moreover, the claw portion provided on the sliding portion 45 can prevent the sliding portion 45 from falling off.

By the way, in the human sensor 49, the sensing area is substantially oval in structure, as shown in FIGS. 8 and 9. Therefore, it is necessary to set the sensing area (rotational position) of the motion sensor 49 according to the shape of the room so that an undetectable dead space does not occur in the room.

However, there is a case where the ceiling ventilation fan cannot be installed so that the piping path of the duct 26 of the ceiling ventilation fan is regulated by the beam or the like behind the ceiling, and the sensing area suitable for the shape of the room is provided. For example, in the private toilet shown in FIG. 8 or the public toilet shown in FIG. 9, when the detection area of the human sensor 49 is set as indicated by the diagonal lines, an undetectable dead space is formed near the toilet 54. .

In this regard, in the second embodiment, two engaging protrusions 50 are provided on the sliding portion 45 which can move up and down and cannot rotate, and the engaging pin 46 is provided on the rotatable holder body 44. Since the engagement pin 46 is provided on either of the engagement protrusions 50, 50,
By selectively contacting with, the rotation position of the holder main body 44 can be changed by 90 degrees according to the shape of the room, and the sensing area of the human sensor 49 can be changed.

Moreover, since the toggle spring 52 is provided between the sliding portion 45 and the holder main body 44, when the holder 43 is pushed up and the holder main body 44 is rotated, the toggle spring 52 is moved.
When the dead point of the spring force passes, the holder body 44 automatically rotates in the rotation direction, and the rotation position of the holder body 44 is changed by 90 degrees. Therefore, the rotation operation of the holder main body 44 can be easily performed, the working time at a high place is shortened, and the work safety is improved.

Next, a third embodiment of the present invention will be described with reference to FIGS. The same parts as those of the first embodiment are designated by the same reference numerals and the description thereof will be omitted. Only different parts will be described below.

First, in FIGS. 10 and 11, the blower unit 30 is provided with a mounting frame 55, and the mounting frame 55 has a circular guide hole 5 as shown in FIG.
5a is formed. A holder 56 is provided on the mounting frame 55. The holder 56 is composed of a two-stage cylindrical holder body 57 and a cylindrical sliding portion 58 that is vertically movably inserted into the guide hole 55a.
A plate-shaped locked portion 58 is provided at the tip of the sliding portion 58.
a is provided, and two convex portions 57a, 57a are provided on the peripheral edge of the holder body 57 so as to face each other.

A compression coil spring 36 is mounted on the outer peripheral surface of the sliding portion 58. The compression coil spring 36 is located between the mounting frame 55 and the holder body 57, and is held by the holder 5.
6 is being pushed downward. The locked portion 58a of the sliding portion 58 engages with the peripheral edge portion of the guide hole portion 55a of the mounting frame 32 to prevent the sliding portion 58 from falling off the guide hole portion 55a. ing. Therefore, in this case, the peripheral edge of the guide hole 55a functions as the locking plate 55b.

On the lower surface of the holder body 57, the human sensor 5
9 is provided. The sensing area of the motion sensor 59 is set in a substantially oval shape, and as shown in FIG. 10, the lead wire 59a led from the motion sensor 59 is
It is connected to the control unit 39.

The body case 24 has an opening 2 for the ceiling plate 22.
A decorative frame 60 is attached by springs 41, 41 so as to cover 2a from the room 21 side. This makeup frame 6
0 is a circular lead-out hole 6 from which the human sensor 59 is led out.
0a and a plurality of openings 60b are formed, and a rising portion 60c is formed on the peripheral edge of the lead-out hole 60a.
Then, on the rising portion 60c, the convex portion 57 of the holder 56 is formed.
A plurality of recesses 60d into which a and 57a are fitted are formed.

Thus, as shown in FIG. 12, the decorative frame 60
By pushing up the holder 56 from the lead-out hole 60a and rotating the holder 56, the convex portions 57a, 57a of the holder 56 and the concave portion 60d of the decorative frame 60 are fitted to change the rotational position of the holder 56 as appropriate. , The sensing area of the human sensor 59 in the room 21 is adjusted appropriately. Therefore, in this case, the concave portion 60d of the decorative frame 60 functions as a receiving portion, and the convex portion 57a of the holder body 57 functions as a positioning portion.

According to the third embodiment described above, the main body case 24
When the decorative frame 60 is fixed to the
Since the convex portions 57a, 57a of the holder 56 are fitted to each other and the holder 56 is received and supported, there is no risk of disturbing the removal work of the decorative frame 60, and the human sensor 59 is always present.
Can be held at a predetermined position with respect to the decorative frame 60. In addition, the compression coil spring 36 allows the holder 56 to smoothly slide downward, so that the motion sensor 59 is present.
Can be reliably held at a predetermined position with respect to the decorative frame 60. Moreover, the locked portion 5 provided on the holder 56
8a can prevent the sliding portion 58 from falling off.

Further, in the third embodiment, the holder 56 is provided to be vertically movable and rotatable, the holder 56 is provided with the convex portion 57a, and the decorative frame 60 is provided with the plurality of concave portions 6.
Since 0d is provided, the rotation position of the holder 56 can be changed to an arbitrary position. Therefore, when the sensing area of the human sensor 59 is an elliptical shape, the rotational position of the holder 56 is restricted so that an undetectable dead space does not occur in the room 21. You can adjust the sensing area.

In the third embodiment, the holder 5
6, the convex portions 57a and 57a are provided, and the decorative frame 60 is provided with the plurality of concave portions 60d. However, the decorative frame 60 is provided with the convex portions, and the holder 56 is provided with the plurality of concave portions to be fitted into the convex portions. May be.

Next, a fourth embodiment of the present invention will be described with reference to FIGS. The same parts as those in the first to third embodiments are designated by the same reference numerals and the description thereof will be omitted. Only different parts will be described below.

First, referring to FIG. 14, the blower unit 30
The mounting frame 32 is provided with a cylindrical holder support 61. An upper surface opening of the holder support base 61 is closed by a locking plate portion 62, and the locking plate portion 62 has
As shown in FIG. 15, the guide hole portions 62a, 6 having an arc shape are formed.
2a is formed, and an insertion hole portion 62b having a large width dimension is formed substantially in the middle of each guide hole portion 62a. The guide hole portions 62a are formed on the upper end surface of the holder support base 61.
A restriction protrusion 63 is provided at a substantially intermediate portion of
As shown in FIG. 16, inclined surfaces 63a, 63a are provided on the upper surface of each restriction protrusion 63.

A holder 64 is attached to the holder support base 61. As shown in FIG. 17, the holder 64 includes a holder main body 65 to which a human sensor 49 having an oval detection area is attached, and a sliding portion 66 protruding from the holder main body 65. Cage, holder body 65
Has a gentle chamfered portion 65a at the upper part of four sides (only two sides are shown) and has a box shape with an open lower surface, and the lower surface opening is closed by a window 67. And
On each of four sides of the window portion 67, an inclined surface portion 67a is formed which is directed inward as it goes downward (see FIG. 1).
7 shows only two sides), as will be described later, each inclined surface portion 6
7a also has a function as a positioning portion for the holder 64.

On the other hand, as shown in FIG. 16, the sliding portion 66 has a cylindrical housing portion 6 in which the compression coil spring 36 is housed.
6a and arcuate wall portions 66b, 66b, and a claw portion 66c as a locked portion projecting to the outer peripheral side is provided at the tip of each wall portion 66b (see FIG. 15). ). Each wall 66b is inserted into the guide hole 62a, and the holder 64 is vertically movable by the wall 66b and 66b being guided by the guide holes 62a and 62a. Moreover, each wall portion 66b has a guide hole portion 62a.
As shown in FIG. 19, dropping from the claws 66
This is prevented by the engagement of c with the upper end surface of the holder support base 61.

Further, in the holder 64, as shown by a solid line in FIG. 15, both side surfaces of the lower claw portion 66c are guide hole portions 62a.
To the first rotation position by engaging with the inner side surface and the side surface of the lower restricting protrusion 63 and one side surface of the upper claw portion 66c engaging with the side surface of the restricting protrusion 63. It is regulated. Then, when the holder 64 is pushed up against the elastic force of the compression coil spring 36 to the position where each claw portion 66c projects from the tip of the restricting protrusion 63, the holder 64 causes each wall portion 66 to move.
It can be rotated so that b is guided by the guide hole 62a.

From this state, as shown in FIG. 20, when the holder 64 is rotated so that each claw portion 66c rides over the restriction projection 63, the lower side as shown by the two-dot chain line in FIG. Both side surfaces of the claw portion 66c are engaged with the inner side surface of the guide hole portion 62a and the side surface of the lower regulating projection 63, and one side surface of the upper claw portion 66c is engaged with the side surface of the regulating projection 63. As a result, the position of the holder 64 is regulated to the second rotation position which is deviated from the first rotation position by about 90 degrees.

As shown in FIG. 14, a power switch 68 is provided on the side surface of the holder body 65. The power switch 68 is for turning on / off the motor 28, and the operator 68
When the power switch 68 is turned off, the motor 28 is not energized and the impeller 29 does not rotate when the presence sensor detects the presence of a person. .

The opening 22a of the ceiling plate 22 has a decorative frame 69.
Is blocked by. The decorative frame 69 has a rectangular shape and is attached to the attachment plates 42, 42 of the main body case 24 by the springs 41, 41, and the attachment angle can be changed by 180 degrees. As shown in FIG. 17, a lead-out hole 69a is formed in the central portion of the decorative frame 69, and a plurality of ribs 70 as guide portions having a substantially right-angled triangular shape project at the peripheral portion of the lead-out hole 69a. It is set up. Further, as shown in FIG. 18, the decorative frame 69 is provided with four openings 69b formed of two elongated holes, and the four openings 69b are arranged so as to surround the lead-out hole 69a. Any one of the openings 69b corresponds to the operator 68a of the power switch 68.

Next, a procedure for attaching the holder 64 to the holder support base 61 will be described. That is, each guide hole 62a
The claw portions 66c of the holder 64 are inserted into the insertion hole portion 62b of the holder from below the holder support base 61. Then, each claw portion 6
6c is pressed by the inner surface of the restricting protrusion 63 so that each wall 66
b is elastically deformed inward, and each wall 66b is inserted into the insertion hole 62b.
20. As shown in FIG. 20, the claw portion 66c is positioned above the restriction protrusion 63. And each claw portion 6
When the holder 64 is pivotally operated, for example, in a clockwise direction so that the 6c gets over the restriction protrusion 63, and then the support is released, the holder 64 is moved downward, and the holder 64 is moved as shown in FIG. , The first rotation position is restricted.

In this mounted state, the wall portion 66b needs to be elastically deformed inward in order for the claw portion 66c to fall off the insertion hole portion 62b, but the holder 64 is moved to the first rotation position and the second position. At the time of performing the rotating operation to the rotating positions of the above, the force that elastically deforms the wall portion 66b inward does not act, and therefore, there is no fear that the holder 64 will drop off during the rotation.

According to the above embodiment, the turning position of the holder 64 can be changed between the first turning position and the second turning position, so that no undetectable dead space is generated in the room. The rotation position of the motion sensor 49 can be changed by 90 degrees.

That is, when the decorative frame 69 is not attached to the ceiling plate 22, the holder 64 is pushed downward by the compression coil spring 36, as shown in FIG.
In this case, the holder 64 is in the first rotation position (shown by the solid line in FIG. 15), and the detection area of the sensor 49 is set to be vertically long with respect to the horizontally long private toilet as shown by the hatched line in FIG. It is assumed that In this state, a relatively large amount of dead space cannot be detected in the toilet, so
The holder 64 is rotated from the first rotation position to the second rotation position. Then, the detection area of the human sensor 49 is changed by 90 degrees to be horizontally long, and the dead space in the private toilet is reduced.

Moreover, when the holder 64 is pushed up and rotated, the inclined surfaces 63a and 63a are formed at the tips of the respective restricting projections 63, so that the respective claw portions 66c are formed.
However, the resistance when overcoming the restriction protrusion 63 is reduced.
Therefore, the rotational operation force of the holder 64 is reduced, and the rotational operation of the holder 64 is facilitated.

Thereafter, as shown in FIG. 14, the ceiling plate 22
Lifting the decorative frame 69 so as to cover the opening 22a of
Since the inclined surface portion 67a of the holder 64 contacts the inclined surface portion 70a of each rib 70 of the decorative frame 69 and the inclined surface portion 67a of the holder 64 is guided by the inclined surface portion 70a of each rib 70, it is surrounded by a plurality of ribs 70. At a predetermined position of the decorative frame 69,
The window 67 of the holder 64 can be easily fitted.

From this state, when the decorative frame 69 is further pushed up and the springs 41 are attached to the respective mounting plates 42, the ribs 70 of the decorative frame 69 cause the inclined surface portion 6 of the holder 64.
Since 7a is received and supported, the holder 64 can be held at a predetermined height position with respect to the decorative frame 69 regardless of the plate thickness t of the ceiling plate 22. Therefore, each rib 70 of the decorative frame 69 functions not only as a guide portion that comes into contact with the inclined surface portion 67a but also as a receiving portion that comes into contact with the inclined surface portion 67a that is also a positioning portion.

The decorative frame 69 has four openings 69b.
Since the holder 64 is formed by 90 degrees from the first rotation position to the second rotation position, the decorative frame 69
Even when the mounting angle of is changed by 180 degrees, one of the four openings 69b always corresponds to the operator 68a of the power switch 68. Therefore, even when the decorative frame 69 is attached to the ceiling plate 22, the operator 68a of the power switch 68 can be always operated through the opening 69b.

Moreover, since the holder main body 65 is provided with the gentle chamfered portion 65a, the fan 29 is used to make the decorative frame 69.
When the air is sucked into the fan casing 27 from the opening 69b, the flow resistance of the air is reduced and the air flow is improved. As a result, the air suction efficiency is increased and the noise during operation is reduced.

As is clear from FIG. 14, the rising position of the holder 64 when the decorative frame 69 is fixed is
It depends on the thickness t of the ceiling plate 22, such that the ceiling plate 22 becomes higher as the thickness t becomes smaller. Therefore, even when the thickness t of the ceiling plate 22 is the minimum value within the standard, the claw portion 66c and the restricting protrusion 63 are engaged with the decorative frame 69 fixed. , Regulation protrusion 63
The height dimension is set to be relatively large, and there is no possibility that the claw portion 66c and the restricting protrusion 63 will be poorly engaged with the decorative frame 69 fixed.

Instead of setting the height of the restriction protrusion 63 to a relatively large value, a plurality of holder support bases which are detachable from the mounting frame 32 and have different heights of the restriction protrusions are prepared. Even if the holder support bases are selectively attached to the attachment frame 32 according to the thickness t of the ceiling plate 22, it is possible to prevent the engagement between the claw portion 66c and the restriction protrusion 63 from being defective. It is possible.

FIG. 21 shows the fifth embodiment of the present invention. The difference between this embodiment and the fourth embodiment is that guide walls 71, 71 are provided on both sides of the restriction protrusion 63. It is located where In this case, each guide wall portion 71 is provided at a portion of the locking plate portion 62 indicated by reference numeral 62c, and when the holder 64 is pushed up, the inclined portion of each guide wall portion 71 is pushed. 71a and the inclined surface portion 63 of the restriction protrusion 63
Each of the claw portions 66c of the holder 64 is guided by a and the force in the rotation direction acts on the holder 64. Therefore, the holder 6
4 is pushed up, the claw portions 66c automatically move to the regulating protrusion 63.
Therefore, the holder 64 can be easily moved to the first rotation position and the second rotation position.

Although the human sensor is used as the sensor in the first to fifth embodiments, a gas sensor for detecting harmful gas in the room may be used. Furthermore, the present invention is not limited to the embodiments described above and shown in the drawings, and may be implemented with appropriate modifications without departing from the scope of the invention.

[0079]

As is clear from the above description, the ceiling ventilation fan of the present invention has the following excellent effects.

According to the first aspect, when the decorative frame is fixed, the positioning part of the holder is received and supported by the receiving part of the decorative frame. Therefore, depending on the size of the ceiling plate. It is possible to always hold the sensor at a predetermined position with respect to the decorative frame without adjusting the mounting position of the sensor by using the sensor. As a result, it is not necessary to perform the troublesome sensor height adjustment work, and the work time at a high place can be shortened to improve the work safety.

According to the second aspect, the holder can be smoothly slid downward by the compression coil spring. As a result, the positioning portion of the holder is surely received and supported by the receiving portion of the decorative frame, so that the sensor provided in the holder can be reliably retained at the predetermined position with respect to the decorative frame. Moreover, since the locked portion that engages with the locking plate portion of the blower unit is provided on the sliding portion of the holder, it is possible to prevent the sliding portion from falling off due to the spring force of the compression coil spring.

According to the third aspect of the present invention, since the holder is pushed up and rotated, the rotation position of the holder can be changed between the first rotation position and the second rotation position. The rotational position of the sensor can be changed as appropriate so that an undetectable dead space does not occur in the room.

According to the fourth aspect, even when the holder is rotated, the power switch can be operated from the intake hole of the decorative frame with the decorative frame attached.

According to the fifth aspect of the present invention, when the decorative frame is lifted so as to cover the opening of the ceiling plate, the inclined guide portion of the decorative frame comes into contact with the inclined surface portion of the holder. It becomes easy to arrange the holder at the predetermined position.

According to the sixth aspect of the present invention, the rotational position of the holder can be regulated by rotating the holder so that the convex portion and the concave portion are fitted to each other. The sensing area of the sensor in the room can be adjusted so that no space is created.

According to the seventh aspect of the present invention, when the holder body is pushed to rotate the holder body, when the dead point of the spring force of the toggle spring is passed, the holder body is automatically rotated in the rotating direction. Is rotated, and the engagement pin of the holder body is selectively brought into contact with the engagement protrusion of the sliding portion. Therefore, the sensing area of the sensor in the room can be changed by 90 degrees. Moreover, since the turning operation of the holder body can be simplified, the working time at a high place can be shortened and the working safety is improved.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing a first embodiment of the present invention.

FIG. 2 is a perspective view of a main part

FIG. 3 is a top view showing a guide hole portion.

FIG. 4 is an enlarged vertical sectional view showing a holder portion.

FIG. 5 is a view corresponding to FIG. 4 showing a state in which a decorative frame is removed.

FIG. 6 is a view corresponding to FIG. 4 showing a second embodiment of the present invention.

FIG. 7 is a perspective view showing an upper surface portion of a holder body.

FIG. 8 is a top view showing a relationship between a private toilet and a sensing area of a sensor.

FIG. 9 is a top view showing a relationship between a public toilet and a sensing area of a sensor.

FIG. 10 is a view corresponding to FIG. 1 showing a third embodiment of the present invention.

FIG. 11 is a view corresponding to FIG.

FIG. 12 is a view corresponding to FIG. 10 showing a state where the holder is pushed up.

FIG. 13 is a view corresponding to FIG.

FIG. 14 is a view corresponding to FIG. 1 showing a fourth embodiment of the present invention.

FIG. 15 is a view corresponding to FIG.

FIG. 16 is a perspective view of a holder portion.

FIG. 17 is a view corresponding to FIG.

FIG. 18 is a view corresponding to FIG.

FIG. 19 is a front view showing a holder.

FIG. 20 is a view corresponding to FIG. 19 showing a state where the holder is pushed up and rotated.

FIG. 21 is a view corresponding to FIG. 16 and showing a fifth embodiment of the present invention.

FIG. 22 is a view corresponding to FIG. 1 showing a conventional example.

FIG. 23 is a view corresponding to FIG. 1 showing another conventional example.

[Explanation of symbols]

Reference numeral 21 is a room, 22 is a ceiling plate, 22a is an opening, 23 is a ceiling, 24 is a main body case, 24a is an inlet, 24b is an outlet, 30 is a blowing unit, 32a is a guide hole, 32b.
Is a locking plate portion, 33 is a holder, 34 is a holder body, and 34b
Is a flange part (positioning part), 35 is a sliding part, 35c is a claw part (engaged part), 36 is a compression coil spring, 38 is a human sensor (sensor), 40 is a decorative frame, 40a is a receiving part, 43 is a holder, 44 is a holder main body, 45 is a sliding part, 46 is an engaging pin, 44c is a flange part (positioning part), 49 is a human sensor (sensor), 50 is an engaging convex part, and 52 is a toggle spring. , 53
Is a decorative frame, 53c is a receiving portion, 55a is a guide hole, 56 is a holder, 57 is a holder main body, 58 is a sliding portion, 57a is a convex portion (positioning portion), 58a is a locked portion, and 59 is a human presence. Sensor (sensor), 60 is a decorative frame, 60d is a concave portion (receiving portion), 62 is a locking plate portion, 62a is a guide hole portion, 63 is a restricting protrusion, 64 is a holder, 65 is a holder main body, and 66 is a slide. Part, 66c is a claw part (locked part), 67a is an inclined surface part (positioning part), 68 is a power switch, 69 is a decorative frame, 69
Reference numeral b indicates an opening, and reference numeral 70 indicates a rib (guide portion, receiving portion).

Claims (7)

[Claims] 1. A main body case which is disposed on the ceiling of the room and has a suction port corresponding to the opening of the ceiling plate on the lower surface and a discharge port on the side surface, and the room which is disposed inside the main body case. A blower unit that inhales air from the suction port and discharges it from the discharge port, and a decorative frame having a receiving portion that is provided so as to cover the opening of the ceiling plate from the room side,
A holder provided on the blower unit so as to be vertically movable,
A sensor provided on the holder for detecting the situation in the room, and a positioning unit provided on the holder for holding the sensor at a predetermined position with respect to the decorative frame by being supported by the receiving portion of the decorative frame. A ventilation fan for the ceiling that is equipped with. 2. The blower unit is provided with a locking plate portion and a guide hole portion, and the holder is composed of a holder body and a sliding portion fitted in the guide hole portion so as to be vertically movable. A compression coil spring that urges the holder downward is provided between the locking plate portion and the holder body, and the sliding portion engages with the locking plate portion and the sliding portion. 2. The ceiling ventilation fan according to claim 1, further comprising a locked portion that prevents the falling off of the guide hole from the guide hole portion. 3. The holder comprises a holder main body and a sliding portion projecting from the holder main body, and the blower unit includes:
A guide hole portion is provided which allows the sliding portion to be fitted and allows the sliding portion to move up and down and rotate within a predetermined angle range. The sliding portion is engaged with the blower unit to slide the sliding portion. A locked portion is provided to prevent the moving portion from falling out of the guide hole portion, and the blower unit is provided with the sliding portion by engaging with the locked portion within the predetermined angle range. Positioning is restricted to a first rotation position and a second rotation position, and rotation of the sliding portion between the first rotation position and the second rotation position is allowed as the holder rises. 2. The ceiling ventilation fan according to claim 1, further comprising a regulating protrusion. 4. The holder has a power switch on a side surface, is vertically movable in the blower unit, and is rotatably provided at a plurality of positions. The decorative frame is provided with the power switch at each rotation position of the holder. Correspondingly, a plurality of openings for intake and for operating a power switch are provided, and the ceiling ventilation fan according to claim 1. 5. An inclined surface portion is provided at the bottom of the holder,
2. The ceiling ventilation fan according to claim 1, wherein the decorative frame is provided with an inclined guide portion that abuts the inclined surface portion and guides the holder to a predetermined position of the decorative frame. 6. A holder is provided on a blower unit so as to be vertically movable and rotatable, one of the holder and the decorative frame is provided with a convex portion, and the other is fitted with the convex portion. The ceiling ventilation fan according to claim 1 or 2, wherein a plurality of recesses are provided for restricting a rotational position of the holder. 7. A main body case, which is provided in the back of the room and has a suction port corresponding to the opening of the ceiling plate on the lower surface, and a discharge port on the side surface, and the room provided inside the main case. A blower unit that inhales air from the suction port and discharges it from the discharge port, and a decorative frame having a receiving portion that is provided so as to cover the opening of the ceiling plate from the room side,
A sliding portion having two engaging projections which are vertically movable and non-rotatably provided on the blower unit and arranged at a pitch of approximately 90 degrees, and the sliding portion rotatably provided on the sliding portion. A holder composed of a holder main body having an engagement pin engaged with the convex portion, and both ends attached to the holder main body and the sliding portion to selectively abut the engagement pin on the two engaging convex portions. A toggle spring to be brought into contact, a sensor provided in the holder main body for detecting a situation in the room, and a sensor provided on the holder main body and supported by a receiving portion of the decorative frame to support the sensor with respect to the decorative frame. A ventilation fan for a ceiling, comprising: a positioning portion that holds the predetermined position.