JPS64520Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a ventilation system having a rotatable and removable hood front plate pivoted to the front opening of a hood body.

[Technical background of the invention]

Conventionally, in a ventilation device called a range hood fan, a blower, such as a ventilation fan, is installed in a hood body with openings on the front and bottom sides, and the front plate of the hood is rotated to open and close the fan. In this case, as shown in Japanese Utility Model Publication No. 49-13010, when an operator is pressed on the lower front side of the hood body, the switch is turned off. A push-on type switch is provided, and when the hood front plate is closed, the hood front plate presses the switch operator to turn off the switch, thereby cutting off the energization path of the ventilation fan motor. It is conceivable that when the hood front plate is opened, the hood front plate releases the pressure on the switch operator and turns on the switch, thereby forming an energizing path for the motor.

[Problems with background technology]

In the conventional configuration, when the hood front plate is removed from the front opening in order to clean the inside of the hood body, the pressure on the switch operator by the hood front plate is released, so the switch is turned on and the ventilation fan motor is turned on. This is extremely dangerous due to the formation of an energized path, and for this reason, it is necessary to pull out the plug of the power cord line from the power outlet before cleaning, resulting in poor cleaning efficiency. It is also conceivable to interpose a separate switch that is manually turned on and off in the energizing path of the motor, but this requires an extra switch, which increases costs.

[Purpose of invention]

The present invention was developed in view of the above circumstances, and its purpose is to automatically turn off the energizing path of the blower motor when the hood front plate is removed from the front opening of the hood body. Then,
To provide a ventilation device which has good cleaning workability and does not increase cost so much.

[Summary of the idea]

The present invention has a front opening of a hood main body, in which a hood front plate is rotatably and removably pivoted to open and close the front opening of the hood main body. A push-on type switch that is turned on when the hood front plate presses an operator when the plate is rotated to open, and is turned off when the hood front plate is closed and when the hood front plate is removed from the front opening. It is characterized by its configuration.

[Example of idea]

An embodiment of the present invention will be described below with reference to FIGS. 1 to 4.

Reference numeral 1 denotes a hood body in the shape of a rectangular box, the lower surface of which is open, and the front surface of which is open except for the upper side and flanges 2 and 3 on both left and right sides; Support pieces 5, 5 having support shafts 4, 4 are formed at the upper portions of the parts 3, 3 so as to protrude forward. Reference numeral 6 denotes a ventilation fan which is a blower and is attached to the upper part of the back plate 7 of the hood body 1 so as to protrude rearward, and this is constructed by disposing a fan 9 and a motor 10 within an outer frame 8, as is well known. There is. Reference numeral 11 denotes an upper support member attached to the flange portion 2 of the hood main body 1, which is oriented obliquely rearward and downward, and has a fitting recess 12 formed at its tip. Reference numeral 13 denotes a lower support member attached to the lower part of the back plate 7 of the hood main body 1, and the tip thereof is oriented diagonally upward and forward. Reference numeral 14 denotes a filter, whose front end is inserted and fitted into the fitting recess 12 of the support 11 and whose rear end is attached to the tip of the support 13 with a mounting screw 15. It is attached removably across the board. Reference numeral 16 designates a rectangular hood front plate, on the upper end of which is formed a pressing piece 17 that is oriented downward, and on the left and right ends of the back side plate 18 that is oriented rearward. It is installed protrudingly. Furthermore, support pieces 19, 19 each having a substantially arcuate shape with their tips pointing downward are attached to both the left and right ends of the upper back surface of the hood front plate 16. The pieces 19, 19 are rotatably and detachably engaged with and supported by the support shafts 4, 4 of the support pieces 5, 5 of the hood main body 1. Reference numeral 20 indicates a support body 11 located at the upper front side inside the hood main body 1.
This is a push-on type switch that is disposed on the top surface and turns on when the operator 21 is pressed. It penetrates through and protrudes forward, and its protruding end faces the pressing piece 17 of the hood front plate 16. The switch 20 includes a power cord wire 24 having a plug 23 at one end that is connected to a power outlet (not shown), and one end connected to the other end of a lead wire 25 connected to the motor 10. , is interposed in the current conduction path of the motor 10 formed by the power cord wire 24 and the lead wire 25. 26, 26 are the supports 11
This is a stopper member attached to both the left and right ends of the front side of the head, and the tip of the end protrudes forward. Reference numerals 27, 27 are stopper pieces formed by bending inward at the upper ends of the side plate parts 18, 18 of the hood front plate 16. They are now facing each other. Reference numerals 28 and 28 indicate well-known locking mechanisms having lock levers 29 and 29 that are movable in the front and back direction, and these are fixed to the lower inner surfaces of the left and right side panels 30 and 30 of the hood main body 1, and the lock levers The front end portions of 29, 29 are the side plate portions 18, 1 of the hood front plate 16.
The hood front plate 16 is removably attached to the inner surface of the lower part of the hood 8 with mounting screws 31, 31, and when the hood front plate 16 is opened as described later, the hood front plate 16 is held at a certain opening position. It's starting to lock down.

Next, the operation of this embodiment will be explained.

First, in the state where the hood front plate 16 closes the front opening of the hood main body 1 as shown in FIGS. 1 and 2, the pressing piece 1 of the hood front plate 16
7 is spaced apart from and opposite to the operator 21 of the switch 20, so that the operator 21 is not pressed and the switch 20 is turned off, cutting off the energizing path of the motor 10 of the ventilation fan 6.

When the hood front plate 16 is rotated in the direction of arrow 32, which is the opening direction, from the state shown in FIGS. The switch 20 moves inward and presses the operator 21 of the switch 20 (see Fig. 3), so the switch 20 turns on and forms an energizing path for the motor 10 of the ventilation fan 6. , the fan 9 is rotated to suck indoor air into the hood body 1 from the bottom opening, and discharge the sucked air to the outdoors via the filter 14 and the outer frame 8, thus starting the ventilation operation. is started. Note that when the hood front plate 16 is rotated in the direction of the arrow 32 to a certain opening angle, the locking mechanisms 28, 28
This locks the hood front plate 16 in its constant open angular position. As a result, the lower opening of the hood main body 1 serving as the intake port becomes larger by the amount that the hood front plate 16 is opened. In addition, when stopping the ventilation operation, once a rotational force is applied to the hood front plate 16 in the closing direction (the direction opposite to the direction of arrow 32), and then a rotational force is applied again in the opening direction (the direction of arrow 32). The locking of the hood front plate 16 by the mechanisms 28, 28 is now released, so that if the hood front plate 16 is rotated again in the closing direction, it will return to the closed state shown in FIGS. 1 and 2. Then, the switch 20 is turned off and the energization path of the motor 10 of the ventilation fan 6 is cut off.

On the other hand, when removing the hood front plate 16 from the front opening of the hood body 1 in order to clean the inside of the hood body 1, the side plate portions 18 of the hood front plate 16,
By removing the mounting screws 31, 31 from 18, the lock levers 29, 29 of the lock mechanisms 28, 28 are removed.
are separated, and then the hood front plate 16 is slightly rotated in the direction of arrow 32 and then moved upward to allow the support pieces 19, 19 to escape from the support shafts 4, 4 of the support pieces 5, 5. In this case, when the hood front plate 16 is removed from the front opening of the hood body 1, the operator 21 of the switch 20 is pressed against the pressing piece 1 of the hood front plate 16.
7, the switch 20 is automatically turned off.

In addition, when removing the filter 14 from inside the hood body 1 for cleaning, etc., the hood front plate 16 does not have to be removed from the front opening of the hood body 1 to be in the closed state as shown in FIGS. 1 and 2. It can be done as is. However, in such a case, if the hood front plate 16 is inadvertently hit by a human body, an object, etc. and the hood front plate 16 is pushed up, the support pieces 19, 19 will move against the support shafts 4, 5 of the support pieces 5, 4 and the hood front plate 16 is removed from the hood body 1.
There is a problem with it falling off. However, according to this embodiment, when the hood front plate 16 is pushed up, the stopper pieces 27, 27 immediately engage the stopper member 2.
6 and 26, further upward movement is restricted, and therefore, unnecessary detachment of the hood front plate 16 from the hood main body 1 can be prevented. From this, when it is necessary to remove the hood front plate 16 from the hood main body 1, first rotate the hood front plate 16 slightly in the opening direction (in the direction of arrow 32) and move the stopper pieces 27, 27 to the stopper member 26. , 26, and then move the hood front plate 16 upward.

According to this embodiment, the following effects are achieved. That is, a push-on type switch 20 that is turned on when the operator 21 is pressed is disposed in the upper part of the hood main body 1, and the hood front plate 16
When the switch 20 is rotated to open, the pressing piece 17 closes the switch 20.
Since the operator 21 of the hood is pressed, the switch 20 is automatically turned off when the hood front plate 16 is removed from the hood body 1. Therefore, the inside of the hood body 1 can be cleaned easily. It is not necessary to pull out the plug 23 of the power cord line 24 from the power outlet (not shown) when removing the hood front plate 16, which improves the cleaning work efficiency. Since there is no need to provide an extra one, the cost does not increase much. Furthermore, when removing the hood front plate 16 from the front opening of the hood main body 1, the mounting screws 31, 31 are removed from the side plate parts 18, 18 of the hood front plate 16, and then the hood front plate 1 is removed.
The removal work is easy because it is only necessary to slightly rotate the hood 6 forward and then move it upward. Also, when attaching the hood front plate 16 to the front opening of the hood main body 1, the operation is the reverse of the above. The installation work is easy as all you have to do is Since the switch 20 is disposed on the upper surface of the support 11 in the hood body 1, the switch 20 is located away from the energizing path of the hood body 1. It is possible to prevent oil contained in the ventilation flow from adhering to the switch 20, and prevent the switch 20 from becoming dirty or malfunctioning due to the adhesion of oil or the like. Moreover, even if a pushing-up force is applied to the hood front plate 16 in the closed state, the stopper pieces 27, 27 of the hood front plate 16 abut and engage with the stopper members 26, 26 of the support body 11 in the hood body 1. Since the upward movement is restricted, when cleaning the filter 14, etc., the hood front plate 1
Even if the hood front plate 16 is hit by a human body, an object, etc., the hood front plate 16 will not fall off unnecessarily from the hood body 1.

Note that the present invention is not limited to the embodiment described above and shown in the drawings; for example, as in another embodiment of the present invention shown in FIG. The reinforcing plate 33 may be removably attached using the mounting screws 34, 34 to prevent deformation of the left and right side plates 30, 30 of the hood body 1, etc., with appropriate modifications within the scope of the gist. Of course it is possible.

[Effect of idea]

As explained above, in the ventilation system of the present invention, a switch that is turned off when the hood front plate is closed and when the hood front plate is removed from the hood body is interposed in the energized path of the blower motor. When cleaning the main unit, there is no need to unplug the power cord from the power outlet, making the cleaning process easier, and there is no need to provide a separate switch that can be turned on and off manually, reducing costs. This has practical effects such as the fact that it never happens.

[Brief explanation of drawings]

1 to 4 show an embodiment of the present invention,
Fig. 1 is a longitudinal side view of the whole, Figs. 2 and 3 are longitudinal side views of main parts in different operating states, and Fig. 4 is a perspective view of the whole with the front hood plate removed. , FIG. 5 is a perspective view of a hood body showing another embodiment of the present invention. In the drawing, 1 is the hood body, 4 is the support shaft, 6 is the ventilation fan (blower), 10 is the motor, 11 and 13 are the supports, 14 is the filter, 16 is the hood front plate, 1
9 is a support piece, 20 is a switch, 21 is an operator, 2
8 indicates a locking mechanism.

Claims (1)

[Scope of utility model registration request] a hood main body with an open front and lower surface and equipped with a blower; a hood front plate rotatably and removably pivoted to the front opening of the hood main body to open and close the hood main body; and a filter attached via a support on the lower side, and an energizing path of the motor of the blower, and when the hood front plate is rotated to open, an operator is pressed by the hood front plate and turned on. A ventilation device comprising a push-on switch that is turned off both when the hood front plate is closed and when the hood front plate is removed from the front opening of the hood body.