JPH0322548B2 - - 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 a 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 surfaces, and a hood front plate is rotated to open and close the fan through the front opening of the hood body. A so-called push-off type switch is provided in the vicinity of the front opening of the hood body to be movable and removable, and further includes a so-called push-off type switch that turns off when an operator is pressed and cuts off the energization path of the motor of the ventilation fan. When the hood front plate is closed, the hood front plate presses the switch operator to turn off the switch, thereby cutting off the electrical current to the motor, and when the hood front plate is opened, the hood front plate operates the switch. A structure is provided in which the motor's current conduction path is formed by releasing the pressure on the child and turning on the switch.

[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 as it creates a current-carrying path, and for this reason, it is necessary to pull out the plug of the power cord line from the power outlet before cleaning, which is inconvenient and makes cleaning work difficult.
It is also conceivable to interpose a separate switch that is turned on and off by manual operation in the energizing path of the motor, but this would require an extra switch, which would increase costs.

(Object of the Invention) The present invention has been made 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. can, therefore,
To provide a ventilation device which has good cleaning workability and does not increase cost so much.

(Summary of the Invention) The present invention provides a hood body with a hood front plate and a push-off type switch, in which an engaged portion is formed on the hood front plate, and the hood body is always provided with an engaged portion in the vicinity of the front opening of the hood body. A lever biased to press the operator of the switch is rotatably mounted, and the lever has an engaging portion that is removably engaged with the engaged portion of the hood front plate. , characterized in that when the engaging part engages with the engaged part, the lever is interlocked with the hood front plate, and the switch's operator is pressed and released in response to closing and opening of the hood front plate. When the hood front plate is removed from the front opening of the hood main body, a lever is used to press the switch operator to automatically turn off the switch.

[Embodiments of the invention]

A first embodiment of the present invention will be described below with reference to FIGS. 1 to 3.

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 that is open except for the upper front plate 2. Three auxiliary intake holes 3 are formed in the front plate 2. Further, substantially U-shaped support pieces 4, 4 are fixed to both left and right end portions of the front plate 2. Reference numeral 5 denotes a ventilation fan which is a blower attached to the upper part of the back plate 6 of the hood main body 1 so as to protrude rearward, and this is composed of an outer frame 7, a motor 8, a fan 9, a bell mouth 10, a shutter 11, etc. . Reference numeral 12 denotes a closing plate attached to the front plate 2 of the hood body 1, and its tip end is attached to the front plate 2 of the hood body 1.
It is oriented diagonally downward at the rear of the inside.
A holding member 13 made of a leaf spring is attached to the tip. Reference numeral 14 denotes a closing plate attached to the lower part of the back plate 6 of the hood body 1, the tip of which is oriented obliquely upward and forward within the hood body 1, and a holding member 15 is attached to the tip. is installed. Reference numeral 16 denotes a filter, which has its front end pressed by the pressing member 13 and its rear end inserted into and held by the holding member 15.
14, and is detachably attached to it. 17
is a rectangular hood front plate, on the upper side of which is formed an upper plate part 18 oriented rearward, and at both left and right ends of the back side side plate parts 19 oriented rearward,
19 is provided protrudingly. Also, this hood front plate 17
At both the left and right ends of the upper plate portion 18, substantially arc-shaped support pieces 20, 20 are formed in a curved manner, and these support pieces 20, 20 are rotatable with respect to the support pieces 4, 4 of the hood main body 1. It is designed to be removably supported. Reference numeral 21 denotes an engaged member, the upper half of which is fixed to the upper back surface of the hood front plate 17, and the lower half of which is oriented diagonally downward to the rear. The lower end portion thereof serves as an engaged protrusion portion 22. Reference numeral 23 denotes a cover attached to the lower surface of the closing plate 12, and a push-off type switch 25 that turns off when the operator 24 is pressed is disposed inside the cover. It penetrates through and protrudes near the front opening of the hood main body 1. This switch 25 is connected to a power cord wire 27 having a plug 26 at one end which is connected to a power outlet (not shown), and a lead wire 28 having one end connected to the motor 8 at the other end. Power cord wire 27 and lead wire 28
It is interposed in the current conduction path of the motor 8 formed by. Reference numeral 29 denotes a support member fixed to the cover 23, the upper end of which projects forward from the front opening of the hood body 1 and projects upward so as to be located near the front plate 2. There is. Reference numeral 30 denotes a lever whose upper end is rotatably mounted on the upper end of the support member 29 by a pin 31, and a pressing protrusion 32 corresponding to the operator 24 of the switch 25 is provided in the middle part of the lever. The intermediate portion of an engaging member 33, which is an engaging portion corresponding to the engaged portion 21, is pivotably provided at the lower end portion of the engaging member 33 by a pin 34. A hook portion 35 is formed at the front end of the hook portion 35 by curving it into an arc shape, the tip of which is directed upward. A tension coil spring 36 is tensioned between the rear end of the engagement member 33 and the cover 23, and the spring force of the tension coil spring 36 causes the lever 30 to always move toward the engagement member. 33, the pressing protrusion 3
2 presses the operator 24 of the switch 25, and the engaging member 33 is normally biased in the direction of arrow B so that its hook portion 35 is directed upward. Reference numeral 37 denotes a drawstring which is a manual operation member, and its upper end is attached to the hook portion 35 of the engagement member 33. Reference numerals 38 and 38 indicate well-known locking mechanisms having lock levers 39 and 39 that are movable in the front and back direction, and these are fixed to the lower inner surfaces of both the left and right side panels 40 and 40 of the hood main body 1, and the lock levers The front end portions of 39 and 39 are the side plate portions 1 of the hood front plate 17.
It is designed to be removably attached to the lower inner surfaces of the hoods 9 and 19 with mounting screws 41 (only one is shown), and when the hood front plate 17 is opened as described later, the hood front plate 17 is held at a certain level. It is designed to lock in the open position.

Next, the operation of this embodiment will be explained.

First, when attaching the hood front plate 17 to the front opening of the hood main body 1, the supporting pieces 20, 20 of the hood front plate 17 are fitted into the supporting pieces 4, 4 of the hood main body 1 from above to support them, Furthermore, the side plate part 1
The front ends of the lock levers 39, 39 of the lock mechanisms 38, 38 are screwed to the holes 9, 19. Thereafter, when the hood front plate 17 is rotated in the direction of arrow C, which is the closing direction, the engaged projecting piece 22 of the engaged member 21 engages the arc-shaped hook portion 35 of the engaging member 33.
As a result, the engaging member 33 is rotated in a direction opposite to the direction of arrow B against the spring force of the tension coil spring 36, and the engaged protrusion portion 22 gets over the tip of the hook portion 35, the engagement member 33 is moved by the tension coil spring 36.
The hook portion 35 is rotated again in the direction of arrow B by the spring force, and the hook portion 35 comes to engage with the engaged protrusion portion 22 (see FIG. 1). When the front opening of the hood main body 1 is closed by the hood front plate 17 shown in FIG. When the pressing protrusion 32 is pressed, the switch 25
Therefore, the switch 25 is turned off and the energization path of the motor 8 of the ventilation fan 5 is cut off.

When the hood front plate 17 is rotated in the opening direction opposite to the direction of arrow C from the state shown in FIG. Since the hook portion 35 of the engagement member 33 is pulled forward, the lever 30 is rotated in the direction opposite to the direction of arrow A through the engagement member 33 against the spring force of the tension coil spring 36. The pressing protrusion 32 releases the pressure on the operator 24 of the switch 25 (see FIG. 2). As a result, the switch 25 is turned on to form an energizing path for the motor 8 of the ventilation fan 5, and the fan 9
is rotated to suck indoor air into the hood main body 1 from the opening on the bottom surface, and discharge the sucked air to the outdoors via the filter 16 and the outer frame 7, thereby starting ventilation operation. Ru. When the hood front plate 17 is rotated to a certain opening angle in the direction opposite to the direction of arrow C, the hood front plate 17 is locked at the certain opening angle position by the locking mechanisms 38, 38. 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 17 is opened. In addition, when stopping the ventilation operation, once a rotational force is applied to the hood front plate 17 in the closing direction (direction of arrow C), and then a rotational force is applied again in the opening direction (direction opposite to the direction of arrow C). Hood front plate 17 by mechanisms 38, 38
Therefore, if the hood front plate 17 is rotated again in the closing direction, the closed state shown in FIG. 1 is returned to, and the switch 25 is turned off and the motor 8 of the ventilation fan 5 This will cut off the energized path.

On the other hand, when removing the hood front plate 17 from the front opening of the hood body 1 in order to clean the inside of the hood body 1, the side plate portions 19 of the hood front plate 17,
The lock levers 39, 39 of the lock mechanisms 38, 38 are separated by removing the mounting screw 41 from the lock mechanism 19, and then the hood front plate 17 is moved upward to allow the support pieces 20, 20 to escape from the support pieces 4, 4. . In this case, when the hood front plate 17 is moved upward, the engaged member 21 also moves upward, so that the engaged protrusion 22
3, these engagements are automatically released, and are therefore urged in the direction of arrow A by the spring force of the tension coil spring 36 via the engagement member 33. The pressing protrusion 32 of the lever 30 comes to press the operator 24 of the switch 25, and the switch 25 is automatically turned off.

Note that when the drawstring 37 is pulled while the hood front plate 17 is in the open state as shown in FIG. The engaged projecting piece 22 of the engaged member 21 of the hook portion 35 is rotated by
The lever 3 is now disengaged from the lever 3.
0 is rotated in the direction of arrow A by the spring force of the tension coil spring 36 via the engagement member 33, and the pressing protrusion 32 comes to press the operator 24 of the switch 25, and the switch 25 is turned off. Ventilation operation is stopped. Therefore, it can be used in cases where there is no need to remove the hood front plate 17 from the front opening of the hood body 1, such as when removing the filter 16 for cleaning or cleaning the lower part of the hood body 1.

According to this embodiment, the following effects are achieved. That is, the lever 3 has a pressing protrusion 32 that presses the operator 24 of the switch 25.
0, and the hook portion 35 of this engaging member 33 is connected to the engaged member 21 of the hood front plate 17.
Since the lever 30 can be interlocked with the hood front plate 17, the pressing protrusion 32 of the lever 30 can be engaged with the engaged protrusion 22 of the lever 30 in response to the closing and opening operations of the hood front plate 17. is switch 25
When the hood front plate 17 is removed from the front opening of the hood main body 1, the engaged protrusion 22 and the hook 35 are pressed and released. Since the engagement is automatically released and the pressing protrusion 32 of the lever 30 presses the operator 24 of the switch 25 to turn off the switch 25, the hood front plate 17 is automatically disengaged in order to clean the inside of the hood body 1. There is no need to pull out the plug 26 of the power cord wire 27 from a power outlet (not shown) when removing the power cord, which improves the cleaning work efficiency, and there is no need to provide an additional manually operated switch in addition to the switch 25. Since there is no such thing, the cost will not increase that much.
Furthermore, when removing the hood front plate 17 from the front opening of the hood body 1, it is only necessary to remove the mounting screws 41 from the side plate parts 19, 19 of the hood front plate 17 and then move the hood front plate 17 upward. Therefore, the removal work is easy, and when the hood front plate 17 is to be attached to the front opening of the hood main body 1, the operation described above is reversed, so the attachment work is also easy. Then, the hook portion 35 of the engaging member 33
Since the drawstring 37 is attached to the hook portion 35, the engagement of the engaged member 21 of the hook portion 35 with the engaged projection portion 22 can be released by pulling the drawstring 37 even when the hood front plate 17 is open. Therefore, since the switch 25 is turned off, when removing and releasing the filter 16 or releasing the lower part inside the hood body 1, etc., the hood front plate 1
This is suitable when there is no need to remove the hood 7, and even in this case, the hood front plate 17 can be left open, improving cleaning efficiency. Furthermore, when the hood front plate 17 is removed from the front opening of the hood body 1, the operator 24 of the switch 25 is moved to the lever 3.
Since the operator 24 is pressed and covered by the pressing protrusion 32 of 0, the operator 24 does not protrude greatly toward the front opening of the hood main body 1, and therefore, it is difficult to switch when cleaning. 25
This prevents damage to the switch 25 due to a human body, object, etc. accidentally colliding with the operator 24 of the switch 25.

FIG. 4 shows a second embodiment of the present invention, which differs from the previous embodiment in that a release member 42 is used as a manual operation member instead of the drawstring 37. The release member 42 is disposed on the back surface of the hood front plate 17 so as to be movable in the vertical direction along a guide pin 43, and is normally urged upward by the spring force of a tension coil spring 44. Further, the upper end of the release member 42 is provided with a hook portion 3 of the engagement member 33.
5 is integrally provided with a corresponding release protrusion 45 from above, and furthermore, the upper end of a connecting wire 46 is connected to the lower end of the releasing member 42, and the lower end of the connecting wire 46 is connected to the side plate 19. It is connected to a locking member 47 that is locked to the lower edge of.

By pulling the engaging member 47 downward, the releasing member 42 is released via the connecting wire 46.
When the is moved downward against the spring force of the tension coil spring 44, the release protrusion 45 engages with the hook part 35, and the engaging member 33 is moved in the direction of arrow B against the spring force of the tension coil spring 36. Therefore, the engaged member 2 of the hook portion 35
The engagement with the first engaged projecting piece 22 is released.

As a result, the same effects as in the previous embodiment can be obtained with this second embodiment.
In particular, since the release member 42 can be operated by the locking member 47 on the lower side of the hood front plate 17, there is an advantage that the operation becomes easy.

FIG. 5 shows a third embodiment of the present invention, which differs from the first embodiment in that a vertically elongated release lever 48 is used as a manual operation member instead of the drawstring 37.
The upper end of the release lever 48 is connected and fixed to the locking member 33.

Therefore, when the release lever 48 is operated backward in the direction of arrow D, the engagement member 33 is released from the tension coil spring 3.
The hook portion 35 is rotated in the direction opposite to the direction of the arrow B against the spring force 6, and the hook portion 35 is disengaged from the engaged protrusion portion 22 of the engaged member 21. The same effects as in the first embodiment can be obtained in this embodiment as well.

In the above embodiment, one tension coil spring 36 is used.
Although the lever 30 is urged to rotate in the direction of the arrow A and the engagement member 33 is urged to be rotated in the direction of the arrow B, it is also possible to use dedicated springs to bias the rotation. , the lever 30 may be biased to rotate in the direction of arrow A by a weight.

In addition, the present invention is not limited only to the embodiments described above and shown in the drawings, and may be implemented with appropriate modifications within the scope of the gist, for example, a Shirotskov fan may be used as the blower. Of course.

[Effects of the Invention] As explained above, in the ventilation system of the present invention, when the hood front plate is removed from the front opening of the hood main body, the switch operator is pressed by the lever pivoted near the front opening. Since the switch is automatically turned off, there is no need to unplug the power cord from the power outlet when cleaning the hood itself, making cleaning easier.In addition, it can be turned on and off manually. There is no need to provide a separate switch for the switch, and the cost does not increase significantly.

[Brief explanation of the drawing]

1 to 3 show a first embodiment of the present invention, FIGS. 1 and 2 are longitudinal sectional side views in different operating states, and FIG. 3 is a perspective view with the hood front plate removed. 4 and 5 are views corresponding to FIG. 2 showing second and third embodiments of the present invention, respectively. In the drawing, 1 is the hood body, 4 is a support piece, 5 is a ventilation fan (blower), 8 is a motor, 17 is a hood front plate,
20 is a support piece, 21 is an engaged member (engaged part),
24 is an operator, 25 is a switch, 29 is a support member, 30 is a lever, 33 is an engaging member (engaging portion),
36 is a tension coil spring, 37 is a drawstring (manual operation member), 38 is a lock mechanism, 42 is a release member (manual operation member), 48 is a release lever (manual operation member)
shows.

Claims (1)

[Scope of Claims] 1. A hood main body having an open front and lower surface and equipped with a blower, and an engaged portion rotatably and removably pivoted to the front opening of the hood main body to open and close the hood main body. A front plate of the hood, a switch that is provided near the front opening of the hood body and turns off when an operator is pressed to cut off the energization path of the blower motor, and a switch that is rotatable near the front opening of the hood body. It has an engaging part that is normally biased to press the operator of the switch and is removably engaged with the engaged part of the hood front plate, and when engaged, the hood front plate A ventilation device comprising: a lever that operates in conjunction with a plate to press and release the pressure on the switch operator in response to closing and opening of the hood front plate. 2. The ventilation device according to claim 1, further comprising a manual operation member for releasing the engagement between the engaged portion of the hood front plate and the engaging portion of the lever.