JP2023010957A - ventilation fan cover - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a ventilation fan cover which can be mounted on any of first, second ventilation fan frames constituted by different specifications.

SOLUTION: A ventilation fan cover 1 includes: intake ports 22, 22a; an inner periphery cover part 23 arranged so as to come into contact with a ventilation fan frame 13 when mounting the ventilation fan cover 1 on the ventilation fan frame 13 of a small specification; and an outer periphery cover part 24 arranged so as to come into contact with a ventilation fan frame 11 when mounting the ventilation fan cover 1 on the ventilation fan frame 11 of a large specification. The inner periphery cover part 23 and the outer periphery cover part 24 are formed in a stepped manner. In a state of directly facing the intake ports 22, 22a, the inner periphery cover part 23 is formed so as to surround the periphery of the intake ports 22, 22a, and the outer periphery cover part 24 is formed so as to surround the periphery of the inner periphery cover part 23. The inner periphery cover part 23 is formed so as to protrude toward the intake port 22 further than the outer periphery cover part 24.

SELECTED DRAWING: Figure 1

COPYRIGHT: (C)2023,JPO&INPIT

Description

TECHNICAL FIELD The present invention relates to a ventilating fan cover, and more particularly to a ventilating fan cover to be put on a ventilating fan frame.

2. Description of the Related Art Conventionally, a ventilating fan cover as described in Patent Document 1 is known. An embodiment in which this conventional ventilation fan cover is attached to a ventilation fan will be described.

20A and 20B are diagrams showing a conventional mounting structure of a ventilation fan cover to a ventilation fan frame, in which (a) is a perspective view showing a state in the middle of mounting, and (b) is a state in which locking has been completed with a locking tool. It is a perspective view showing.

Referring to the figure, for example, a ventilation fan 8 is provided on a wall facing the room of a house. The ventilation fan 8 is composed of a base frame 80 attached to the wall, a propeller 81, and a ventilation fan frame 82 covering the propeller 81. - 特許庁The ventilation fan frame 82 is provided so as to protrude from the wall on which the base frame 80 is attached. Assuming that this projecting direction is forward, the front end of the ventilation fan frame 82 is formed with a flat plate portion 82a that is quadrangular (usually square) in front view. A suction port 83 having a circular shape when viewed from the front is opened in the flat plate portion 82a. The intake port 83 is arranged in front of the propeller 81 so as to face the propeller 81 . Further, the ventilating fan frame 82 is formed with a cylindrical plate portion 82b extending rearward from the upper, lower, right and left edges of the flat plate portion 82a. A rectangular outer peripheral corner portion (bent portion) 82c is provided between the flat plate portion 82a and the tubular plate portion 82b.

The ventilation fan cover 7 is composed of a cover body 71 and a filter 70 made of nonwoven fabric. A flat plate portion 73 is formed on the cover body 71 , and a window frame portion 72 is formed so as to protrude forward from the flat plate portion 73 . The filter 70 is attached to the inner surface of the window frame portion 72, and a pair of upper and lower intake ports 72a and 72b formed in the window frame portion 72 are covered with the filter 70 from the inside. Locking portions 77 having locking holes 77a are formed at appropriate locations of the flat plate portion 73 of the cover body 71 on both left and right sides of the window frame portion 72 .

The cover main body 71 is formed with side plate portions 74 having an inverted U shape when viewed from the front and extending rearward from the right end, the left end, and the upper end of the flat plate portion 73 which forms the four sides of a square when viewed from the front. An outer peripheral corner portion 75 is formed between the flat plate portion 73 and the side plate portion 74 . The outer peripheral corner portion 75 is aligned with the outer peripheral corner portion 82c of the ventilation fan frame 82, the side plate portion 74 of the ventilation fan cover 7 covers the outer surface of the cylindrical plate portion 82b of the ventilation fan frame 82, and the flat plate portion 73 covers the flat plate portion 82a of the ventilation fan frame 82. The covered state is defined as a state in which the ventilation fan cover 7 covers the ventilation fan frame 82 .

Further, the cover body 71 is formed with a flap 76 extending downward from the flat plate portion 73 to cover the lower end portion of the ventilation fan frame 82 . The boundary line between the flat plate portion 73 and the flap 76 is a folding line 76a, and the angle of the flap 76 with respect to the ventilation fan frame 82 can be adjusted by adjusting the folding angle at the folding line 76a.

The ventilator cover locking device 9 (hereinafter simply “locking device 9”) comprises a clip 91 , a spring 92 and a hook 93 . The clip 91 is formed by bending a steel plate into a U-shape. The spring 92 is a coiled tension spring, both ends of which are ring-shaped, and one end of the hook 93 is also formed with a ring-shaped portion 93a. A ring-shaped portion at one end of the spring 92 is engaged with a locking pawl portion 91a formed on the clip 91, and a ring-shaped portion at the other end of the spring 92 is engaged with a ring-shaped portion 93a of the hook 93, whereby the clip 91, Three members, a spring 92 and a hook 93, are connected.

When attaching the ventilation fan cover 7 to the ventilation fan 8 , first, the ventilation fan frame 82 is removed from the base frame 80 of the ventilation fan 8 . The clip 91 of the locking member 9 is clipped to the rear edge of the opening of the ventilation fan frame 82 thus opened, and in this state, the ventilation fan frame 82 is returned to its original position covering the propeller 81 . As a result, the clip 91 is sandwiched between the base frame 80 and the ventilation fan frame 82, and the ventilation fan 8 is provided with the locking member 9 having the hook 93 as a free end. Although not shown in FIG. 20, a similar locking member is also provided on the left and right opposite sides of the ventilation fan frame 82 .

From this state, referring to FIG. 20(a), the ventilation fan cover 7 is put on the ventilation fan frame 82 of the ventilation fan 8 while being aligned as described above. Further, referring to FIG. 20(b), the spring 92 of the locking member 9 attached to the ventilation fan frame 82 is pulled forward, and the hook 93 is inserted into the locking hole 77a of the locking portion 77. As shown in FIG. The hooks of a locking device (not shown) on the opposite side of the locking device 9 are inserted into the locking holes of the ventilation fan cover 7 in the same manner. In this way, the left and right portions of the ventilation fan cover 7 are locked to the left and right portions of the ventilation fan frame 82 of the ventilation fan 8 via the locking members 9 and locking members (not shown), and the ventilation fan cover 7 is attached to the ventilation fan 8. is completed.

Preliminary locking portions 78 and 79 are also provided above and below the window frame portion 72 of the ventilation fan cover 7, and the left and right locking portions including the locking portion 77 are provided with hooks 93 of the locking tool 9. These latching portions 78 and 79 are used when it is difficult to hang.

JP-A-2000-254427

However, there are various standards for the ventilating fan frame according to the size of the propeller of the ventilating fan. It is formed and configured to correspond to the ventilation fan frame 82 of a predetermined standard, and a ventilation fan cover with a different configuration must be prepared for the ventilation fan frame of other standards. In other words, it is necessary to provide ventilating fan covers of various standards so as to correspond to individual standards of ventilating fan frames.

If the ventilation fan cover 7 is attached in a state in which the inner surface (lower surface) of the upper end of the side plate portion 74 is in contact with the outer surface (upper surface) of the upper end of the ventilation fan frame of another standard smaller than the standard of the ventilation fan frame 82, Since the size of the ventilation fan cover 7 differs greatly from that of a small ventilation fan of another standard, there is a large gap between the outer surfaces of the left and right sides of the cylindrical plate portion of the ventilation fan frame and the inner surfaces of the left and right sides of the side plate portion 74 of the ventilation fan cover 7. A gap is created, and air containing oil is directly sucked into the ventilation fan through this gap without passing through the filter at the intake port, so the ventilation fan becomes dirty.

The present invention has been made to solve the above-mentioned problems, and can be attached to any large or small ventilating fan according to different standards, and can provide the desired protective effect against contamination to the ventilating fan of each standard. The purpose is to provide a ventilation fan cover.

In order to achieve the above object, the invention according to claim 1 provides a ventilating fan cover, which covers at least the first ventilating fan frame configured according to a predetermined standard. A first cover part having an outer peripheral corner part corresponding to the corner part, and an outer peripheral corner part of the second ventilating fan frame so as to be able to cover the second ventilating fan frame composed of a predetermined standard larger than the first ventilating fan frame. and a second cover portion having an outer peripheral corner portion corresponding to the second cover portion, and the first cover portion and the second cover portion are connected in a stepped manner.

With this configuration, the ventilating fan cover can be attached to both the first ventilating fan frame having a predetermined standard and the second ventilating fan frame having a predetermined standard larger than the first ventilating fan frame. Each ventilating fan frame is positioned only by aligning the outer peripheral corner of each cover part with the outer peripheral corner of the corresponding ventilating fan frame, and the gap between each ventilating fan frame and the ventilating fan cover can be reduced.

According to a second aspect of the invention, in the configuration of the first aspect of the invention, an intake port is provided, and the first cover portion is formed so as to surround the intake port when the intake port is viewed directly from the outside. The second cover portion is formed to surround the first cover portion, and the first cover portion is formed to protrude forward from the second cover portion.

With this configuration, when the first cover portion is placed over the first ventilation fan frame, the second cover portion overlaps the first ventilation fan frame and the first cover portion when the intake port is viewed directly from the outside. Since it is arranged so as to surround the periphery, it does not interfere with the state in which the first cover part is put on the first ventilation fan frame. On the other hand, when the second cover part is put on the second ventilation fan frame, the first cover part protrudes forward from the second ventilation fan frame and the second cover part when the intake port is viewed directly from the outside. Therefore, the state in which the second ventilation fan frame is covered with the second cover portion is not hindered. Also, even if the air passes through the air intake, the oil contained in the air may not be completely removed by the filter. Although the amount of oil in the air passing through may be reduced, in the present invention, the stepped shape prevents the first cover portion from stepping when the second cover portion is placed on the second ventilation fan frame. protrudes from the second cover portion, the surface area of the rear surface of the ventilating fan cover that contacts the intake air from the air inlet to the propeller increases compared to the case where the stepped shape is not provided. Furthermore, since the air intake is far away from the propeller in this way, oil stains are not concentrated in the central portion of the air intake, and oil stains can be evenly removed from the entire wide area of the air intake.

According to a third aspect of the invention, in the configuration of the second aspect of the invention, the locking portion is provided for locking a locking tool locked to the first ventilation fan frame or the second ventilation fan frame.

With this configuration, the ventilation fan cover can be easily attached using the fasteners.

According to a fourth aspect of the invention, in any one of the first to third aspects of the invention, the first cover portion and the second cover portion are made of synthetic resin.

With this configuration, the surfaces of the first cover part and the second cover part made of synthetic resin can be made smooth without unevenness, and the first ventilation fan frame and the first cover part put thereon can be Also, the second ventilation fan frame and the second cover portion placed thereon can be brought into contact with each other with a reduced gap.

According to a fifth aspect of the invention, in the configuration of any one of the first to third aspects of the invention, ribs are formed in the second cover portion.

With this configuration, the second cover portion is reinforced by the ribs. In addition, when the second cover part is placed on the second ventilation fan frame, the ribs increase the surface area of the rear side surface, so that more oil contained in the intake air can adhere. Furthermore, ribs protrude on the front side, and when oil contained in the air intake to the ventilation fan reaches the surrounding second cover part through the first cover part from the air inlet, for example, such oil is removed. It can be received by convex ribs.

According to a sixth aspect of the invention, in the configuration of the second aspect of the invention, a filter is attached so as to cover the intake port.

With this configuration, whether the ventilating fan cover of the present invention is attached to the first ventilating fan frame or to the second ventilating fan frame, oil stains on the ventilating fan caused by air containing oil passing through the filter can be prevented. A suppressing effect is obtained.

As described above, according to the invention of claim 1, the ventilating fan cover of the first ventilating fan frame having a predetermined standard and the second ventilating fan frame having a larger predetermined standard than the first ventilating fan frame are provided. can also be attached to Each ventilating fan frame is positioned only by aligning the outer peripheral corner of each cover part with the outer peripheral corner of the corresponding ventilating fan frame, and the gap between each ventilating fan frame and the ventilating fan cover can be reduced. By connecting the first cover part and the second cover part having such functions in a stepped manner, the standard ventilation fan with the first ventilation fan frame also has the second ventilation fan frame. To achieve the object of the invention of providing a ventilating fan cover which can be attached to any ventilating fan and can suppress contamination of the ventilating fan no matter which one is attached.

According to the second aspect of the invention, in addition to the effects of the first aspect of the invention, when the first cover part is put on the first ventilation fan frame, the second air intake port is placed in a state in which the intake port is viewed from the outside. Since the cover part is arranged so as to surround the first ventilation fan frame and the first cover part, the state in which the first cover part covers the first ventilation fan frame without any gap is not hindered. On the other hand, when the second cover part is put on the second ventilation fan frame, the first cover part protrudes forward from the second ventilation fan frame and the second cover part when the intake port is viewed directly. , the state in which the second cover part is tightly covered on the second ventilation fan frame is not hindered. Also, even if the air passes through the air intake, the oil contained in the air may not be completely removed by the filter. Although the amount of oil in the air passing through may be reduced, in the present invention, the stepped shape prevents the first cover portion from stepping when the second cover portion is placed on the second ventilation fan frame. protrudes from the second cover portion, the surface area of the rear surface of the ventilating fan cover that is in contact with the intake air between the intake port and the propeller increases compared to the case where the stepped shape is not provided. As a result, it is possible to increase the adhesion amount of oil in the air mixed with the intake air while the oil-containing air passes through the intake port and reaches the propeller of the ventilation fan. Furthermore, since the air intake is far away from the propeller in this way, oil stains are not concentrated in the central portion of the air intake, and oil stains can be evenly removed from the entire wide area of the air intake.

According to the invention of claim 3, in addition to the effects of the invention of claim 2, it is possible to easily engage and remove the locking member to and from the locking portion of the ventilation fan cover.

In addition to the effect of the invention according to any one of claims 1 to 3, the invention according to claim 4 is characterized in that the surfaces of the first cover part and the second cover part made of synthetic resin are smooth without unevenness. The first ventilating fan frame and the first cover part put thereon, and the second ventilating fan frame and the second cover part put thereon are in contact with each other with a reduced gap. can be done. Therefore, it is possible to further reduce the problem that oil-mixed air is directly sucked into the ventilation fan through the gap between the ventilation fan cover and the ventilation fan frame without passing through the filter of the intake port. 2 Even when covering the ventilation fan frame, the effect of protecting the ventilation fan from dirt by the ventilation fan cover can be stabilized.

According to the invention of claim 5, in addition to the effects of the invention of any one of claims 1 to 3, the second cover part is reinforced with ribs. In addition, when the second cover part is placed on the second ventilation fan frame, the ribs increase the surface area of the rear side surface, so that more oil contained in the intake air can adhere. Furthermore, ribs protrude on the front side, and when oil contained in the air intake to the ventilation fan reaches the surrounding second cover part through the first cover part from the air inlet, for example, such oil is removed. It can be received by convex ribs. In this manner, when the second cover portion is placed over the second ventilation fan frame, the ribs formed on the second cover portion allow the oil contained in the air before it is introduced into the intake port to be removed by the surface of the ventilation fan cover. A large amount of oil can be attached, and the amount of oil adhering to the ventilation fan can be reduced accordingly, and the effect of protecting the ventilation fan against contamination by the ventilation fan cover can be further enhanced. Further, since the rib formed on the second cover portion is used as the means having such an oil receiving function, it is possible to further reduce the cost of the ventilation fan cover.

According to the sixth aspect of the invention, in addition to the effect of the second aspect of the invention, the ventilation fan cover of the present invention contains oil whether it is attached to the first ventilation fan frame or the second ventilation fan frame. It is possible to obtain the effect of suppressing oil contamination of the ventilation fan due to air passing through the filter. Therefore, the effect of preventing the ventilation fan from becoming dirty, which is originally required for the ventilation fan cover, can be obtained for both the ventilation fan having the first ventilation fan frame and the ventilation fan having the second ventilation fan frame.

1 is a front view of a ventilating fan cover locking device (hereinafter simply "locking device") and a ventilating fan cover of the present invention; FIG. 2 is an enlarged view of part A shown in FIG. 1; FIG. FIG. 2 is a rear view of the ventilation fan cover shown in FIG. 1; FIG. 2 is an enlarged side view of the ventilation fan cover shown in FIG. 1; FIG. 2 is an enlarged plan partial cross-sectional view of the ventilation fan cover shown in FIG. 1; FIG. 2 is an enlarged bottom view of the ventilation fan cover shown in FIG. 1; It is a side view of a locking tool. It is a top view of a locking tool. FIG. 10 is an enlarged side view showing a state in the middle of attaching a locking member to a ventilation fan frame removed from a large ventilation fan and putting a ventilation fan cover over it. FIG. 4 is a plan partial cross-sectional view showing a state in the middle of putting a ventilation fan cover over the ventilation fan frame attached to the large ventilation fan with the fasteners attached. Fig. 10 is an enlarged side view of the ventilation fan cover in a state of being locked to the ventilation fan frame of the large ventilation fan by locking tools; 12 is an enlarged view of a portion B shown in FIG. 11; FIG. FIG. 12 is a plan partial cross-sectional view of the ventilation fan cover in the state shown in FIG. 11; 14 is an enlarged cross-sectional view of a portion C shown in FIG. 13; FIG. FIG. 4 is an enlarged front view showing a portion of the ventilation fan cover to which the locking tool is locked; 4 is an enlarged side view of the ventilating fan cover in a state of being locked to the ventilating fan frame of the small ventilating fan by a locking tool. FIG. 17 is an enlarged view of part D shown in FIG. 16. FIG. FIG. 17 is a plan partial cross-sectional view of the ventilation fan cover in the state shown in FIG. 16; 19 is an enlarged cross-sectional view of the E portion shown in FIG. 18; FIG. Fig. 10 is a view showing a conventional mounting structure of a ventilation fan cover to a ventilation fan frame, (a) being a perspective view showing a state in the middle of being mounted, and (b) being a perspective view showing a state where locking has been completed with locking tools. be.

FIG. 1 is a front view of a ventilation fan cover locking device (hereinafter simply referred to as a "locking device") and a ventilation fan cover of the present invention, FIG. 2 is an enlarged view of part A shown in FIG. 1, and FIG. 1 is a rear view of the ventilation fan cover shown in FIG. 1, FIG. 4 is an enlarged side view of the ventilation fan cover shown in FIG. 1, and FIG. 5 is an enlarged plan partial cross-section of the ventilation fan cover shown in FIG. 6 is an enlarged bottom view of the ventilation fan cover shown in FIG. 1. FIG.

The arrow F shown in these figures indicates forward, the arrow L indicates left, the arrow R indicates right, and the arrow U indicates upward. That is, the direction opposite to arrow F is backward, and the direction opposite to arrow U is downward.

Referring to these figures, the ventilation fan cover 1 includes a cover body 2 and a filter 3, and a pair of locking members 4 and 5 can be attached to the cover body 2. As shown in FIG.

The cover body 2 is formed by vacuum forming a polyvinyl chloride sheet having a thickness of about 1 mm, for example. Moreover, it has flexibility (flexibility) that allows it to be deformed along the locking tools 4 and 5 when it is pressed by the locking tools 4 and 5, for example. Furthermore, the front and back surfaces are smooth surfaces with no irregularities or wrinkles, and when attached to the ventilation fan frame, the gap between the fan frame and the ventilation fan frame can be reduced to ensure a contact state.

A window frame portion 21 having a substantially rectangular shape in a front view is formed on the cover body 2 . A central rib 21a is formed in the vertical center of the window frame 21 so as to extend in the left-right direction and protrude forward. The central rib 21a is the foremost end of the ventilating fan cover 1, and the window frame 21 protrudes forward in a pentagonal shape with the central rib 21a as the apex when viewed from the side.

Since the cover body 2 of the ventilating fan cover 1 is a synthetic resin molding as described above, the strength is ensured by forming such a central rib 21a.

Thus, in the window frame portion 21, the upper intake port 22 is opened at the upper inclined surface portion that is inclined rearward and upward from the central rib 21a to the upper end of the window frame portion 21. A lower intake port 22a is provided on a lower inclined surface portion that is inclined rearwardly and downwardly to the lower end of .

As shown in FIG. 3, the filter 3 is attached to the rear surface of the window frame portion 21, and the filter 3 covers both air inlets 22 and 22a. With this configuration, air containing oil generated during cooking passes through the intake ports 22 and 22a, and after the oil is removed by the filter 3, the air passes through the ventilation fan. The filter 3 is made of a material suitable for removing oil in the air, such as non-woven fabric.

An inner peripheral cover portion (first cover portion) 23 is formed so as to surround the window frame portion 21 when viewed from the front (that is, when the intake ports 22 and 22a are viewed directly from the outside). The inner peripheral cover portion 23 has a flat plate-shaped flat plate portion 23a, and a substantially square tubular cylindrical plate portion 23b extending rearward from the outer peripheral edge of the flat plate portion 23a. The upper end of the window frame portion 21 and the upper end of the inner peripheral cover portion 23 are flush with each other, and the flat plate portion 23a is formed in a substantially U shape when viewed from the front.

Between the flat plate portion 23a and the tubular plate portion 23b, that is, a portion that is the outer peripheral edge of the flat plate portion 23a and the front edge of the tubular plate portion 23b forms a rectangular outer peripheral corner portion 23c. This outer peripheral corner portion 23c is formed corresponding to the outer peripheral corner portion 13c of the ventilation fan frame 13 of the small ventilation fan 12, which will be described later.

Further, an outer peripheral cover portion (second cover portion) 24 is formed so as to surround the inner peripheral cover portion 23 when viewed from the front (that is, when the intake ports 22 and 22a are viewed from the front). The outer peripheral cover portion 24 has a flat plate-shaped flat plate portion 24a and a substantially square tube-shaped cylindrical plate portion 24b extending rearward from the outer peripheral edge of the flat plate portion 24a.

Between the flat plate portion 24a and the tubular plate portion 24b, that is, a portion that is the outer peripheral edge of the flat plate portion 24a and the front edge of the tubular plate portion 24b is a rectangular outer peripheral corner portion 24c. This outer peripheral corner portion 24c is formed corresponding to the outer peripheral corner portion 11c of the ventilating fan frame 11 of the large ventilating fan 10, which will be described later.

On the other hand, a brim-shaped flange portion 24d is formed at the rear end portion of the tubular plate portion 24b. In the present embodiment, a step in the outer peripheral direction is formed in the front and rear halfway of the tubular plate portion 24b, and the rear portion of the tubular plate portion 24b from this step to the flange portion 24d is the tubular plate portion in front of it. The front part of 24b is expanded. However, the shape of the tubular plate portion 24b is not limited to this. It doesn't have to be.

The flat plate portion 24a extends vertically and horizontally from the rear end of the tubular plate portion 23b, which is the outer peripheral edge of the inner peripheral cover portion 23, and is formed in a substantially square shape when viewed from the front. The flange portion 24d is the rear end portion of the cylindrical plate portion 24b, and is the rear end of the main body cover 2 and the outer peripheral edge in a front view.

Thus, the flat plate portion 24a is formed at the front end of the outer peripheral cover portion 24. As shown in FIG. A tubular plate portion 23b of the inner peripheral cover portion 23 protrudes forward (front side when the intake ports 22, 22a are viewed from the outside) from the inner peripheral end of the flat plate portion 24a of the outer peripheral cover portion 24. As shown in FIG. A flat plate portion 23 a is formed at the front end of the inner peripheral cover portion 23 . That is, in the main body cover 2, the inner peripheral cover portion 23 and the outer peripheral cover portion 24 are formed so as to be connected in a stepped manner, and the inner peripheral cover portion 23 is formed on the inner peripheral side of the outer peripheral cover portion 24. It is configured to protrude forward from the outer peripheral cover portion 24 .

The flat plate portion 24a of the outer peripheral cover portion 24 is formed with a pair of left and right locking portions 25, 26 for locking a pair of left and right ventilation fan cover locking members (hereinafter simply referred to as "locking members") 4, 5. ing.

The left engaging portion 25 has an oval shape elongated in the horizontal direction when viewed from the front and a trapezoidal shape when viewed from above. It is formed in a forward protruding shape at a position substantially at the same position as the central rib 21a in the direction. A flat plate-like portion at the front end of the left locking portion 25 is provided with a locking hole 25a for inserting the hook portion 49 (see FIG. 10) of the left locking tool 4 .

The right engaging portion 26 is formed in a forward protruding shape on the right side of the inner peripheral cover portion 23 and at a substantially vertically central position of the flat plate portion 24a (substantially at the same position as the central rib 21a in the vertical direction). , and has a locking hole 26a for inserting the hook portion 59 (see FIG. 10, etc.) of the right locking member 5, which is configured in the same manner as the left locking portion 25. As shown in FIG.

Further, the flat plate portion 24a of the outer peripheral cover portion 24 is formed with an outer peripheral rib group 27 projecting forward. The outer peripheral rib group 27 includes outer peripheral ribs 27a and 27b formed above the engaging portions 25 and 26 and outer peripheral ribs 27c, 27d and 27e formed below the engaging portions 25 and 26. As shown in FIG.

The outer peripheral ribs 27a and 27b are arranged in parallel, and the outer peripheral rib 27b is arranged on the inner peripheral side of the outer peripheral rib 27a. The outer peripheral ribs 27a and 27b are formed in a substantially inverted U shape when viewed from the front, and extend over the upper half of the flat plate portion 24a which is substantially square when viewed from the front as described above. That is, the outer peripheral ribs 27a and 27b extend in the left-right direction above the inner peripheral cover portion 23, and the left and right end portions of the outer peripheral ribs 27a and 27b are bent to the left and right of the inner peripheral cover portion 23. Extending downward, each lower end portion is arranged to be close to the upper ends of the left locking portion 25 and the right locking portion 26 .

The outer peripheral ribs 27c and 27d are formed vertically symmetrically with respect to the outer peripheral ribs 27a and 27b with the left and right locking portions 25 and 26 interposed therebetween, that is, formed in a substantially U shape when viewed from the front, and substantially a square shape when viewed from the front. extends to the lower half of the flat plate portion 24a.

Below the inner peripheral cover portion 23, the outer peripheral rib 27c of the flat plate portion 24a is arranged below the outer peripheral rib 27d of the flat plate portion 24a, and below the outer peripheral rib 27c, it extends straight in the horizontal direction in a front view. An outer peripheral rib 27e is arranged.

That is, the flat plate portion 24a of the outer peripheral cover portion 24 has two rows of outer peripheral ribs above and below the inner peripheral cover portion 23, and two rows of outer peripheral ribs on the left and right sides of the inner peripheral cover portion 23, respectively. , three rows of outer peripheral ribs are formed below the inner peripheral cover portion 23 .

The outer peripheral rib group 27 increases the strength of the cover body 2 .

Each of the locking devices 4 and 5 shown in FIG. 1 is formed by bending a linear body such as a wire. The fasteners 4 and 5 have the same configuration, and the fastener 5 will be described as a representative of them.

7 is a side view of the locking device, and FIG. 8 is a plan view of the locking device.

The locking member 5 is formed by bending a single linear member such as a wire made of metal such as iron, and has a clip portion 50 at one end and a hook portion at the other end. 59 is formed, and a coiled tension spring portion 55 (hereinafter simply “spring portion 55”) is formed between the clip portion 50 and the hook portion 59 .

The clip portion 50 is formed by bending a linear body into a paper clip shape, and the outer extension portion 50a thereof is arranged outside the ventilation fan frame, and the majority thereof is arranged inside the ventilation fan frame. By doing so, the ventilation fan frame is clamped.

A first bent portion 53 formed by bending a linear body is formed between the outer extending portion 50a of the clip portion 50 and the first end portion 55a of the spring portion 55 . A first straight portion 52 extending from the first bent portion 53 toward the clip portion 50 is connected to the end portion 51 of the clip portion 50 , and the first straight portion 52 extends from the outer extension portion 50 a of the clip portion 50 . It is in a bent state at the end portion 51 . On the other hand, a second straight portion 54 extending from the first bent portion 53 toward the spring portion 55 is connected to a first end (rear end) 55a of the spring portion 55, and the second straight portion 54 is connected to the spring portion 55a. 55 at the first end 55a.

On the other hand, between the spring portion 55 and the hook portion 59, a second bent portion 57 is formed by bending a linear body. A fifth linear portion 58 extends from the second bent portion 57 to the hook portion 59 , and the hook portion 59 is bent in an arc shape toward the fifth linear portion 58 . When the hook portion 59 is arranged inside the ventilating fan cover 1 through the locking hole 26a, the folded shape prevents the hook portion 59 from coming off. Further, the fifth straight portion 58 extending from the locking hole 26a is rotatable with the hook portion 59 serving as a fulcrum of rotation. The extension angle in is adjustable. Furthermore, when moving the locking tool 5 to the locking hole 26a and inserting it, it becomes a knob that can be grasped by a person's fingers.

The second bent portion 57 is bent corresponding to the bent portion of the outer peripheral cover portion 24, which is the joint portion between the outer peripheral end of the flat plate portion 24a and the front end of the tubular plate portion 24b. As a result, even if the fifth linear portion 58 rotates about the hook portion 59 as described above, it does not interfere with the cover main body 2, and the spring portion 55 is arranged along the side of the tubular plate portion 24b. placed.

A circular curved portion 56 is formed between the second bent portion 57 and the spring portion 55 by winding a linear body in a direction substantially orthogonal to the winding direction of the spring portion 55 .

A state in which the third linear portion 56a extends from the circular curved portion 56 to the second end (front end) 55b of the spring portion 55 and is bent from the third linear portion 56a to the spring portion 55 at the second end 55b. It's becoming

On the other hand, the fourth linear portion 56b extends from the circular curved portion 56 to the second bent portion 57. As shown in FIG. The front end portion of the third straight portion 56a and the rear end portion of the fourth straight portion 56b are arranged to overlap each other with the circular curved portion 56 interposed therebetween.

Due to the elastic deformation of the circular curved portion 56, the overlapping area between the third straight portion 56a and the rear end portion of the fourth straight portion 56b changes, and the distance between the second bent portion 57 and the spring portion 55 increases. The angle of the spring portion 55 with respect to the fifth straight portion 58 is adjusted by adjusting and changing the relative angle between the third straight portion 56a and the fourth straight portion 56b.

Here, referring to FIGS. 7 and 8 as well as FIG. 10 described later, when viewed in the axial direction of the spring portion 55, the circumferential direction of the spring portion 55 of each of the first end portion 55a and the second end portion 55b is substantially match. Therefore, if the first end portion 55a and the second end portion 55b are aligned along the outer surface of the tubular plate portion 24b of the outer peripheral cover portion 24 of the ventilation fan cover 1, the spring portion 55 spreads outward from the tubular plate portion 24b. , so as to be arranged without interfering with the tubular plate portion 24b.

The third linear portion 56a and the fourth linear portion 56b extend from the second end portion 55b substantially parallel to the axial direction of the spring portion 55, and as described above, the second end portion 55b extends outside the tubular plate portion 24b. If it is made to follow the side surface, the third straight portion 56a and the fourth straight portion 56b will also follow the outer surface of the tubular plate portion 24b.

On the other hand, the circular curved portion 56 overlaps with the spring portion 56 when viewed in the axial direction of the spring portion 55 . That is, when viewed in the axial direction of the spring portion 55, the circular curved portion 56 is arranged on the same side (or the side close to it) as the spring portion 56 via the first end portion 55a and the second end portion 55b. Therefore, if the third linear portion 56a and the fourth linear portion 56b are along the outer side surface of the cylindrical plate portion 24b, the circular curved portion 56 is arranged so as to spread outward from the cylindrical plate portion 24b together with the spring portion 55. , and the cylindrical plate portion 24b.

On the other hand, the clip portion 50 and the hook portion 59 are arranged on the opposite side (or away from the spring portion 55) via the first end portion 55a and the second end portion 55b when viewed in the axial direction of the spring portion 55. placed. The clip portion 50 clamps the ventilation fan frame, and the hook portion 59 is engaged with the engagement portion 26 formed on the flat plate portion 24a of the outer peripheral cover portion 24 of the ventilation fan cover 1. For example, the first end 55a and the second end 55b of the spring portion 55 are arranged inside the cylindrical plate portion 24b.

That is, when the clip portion 50 and the hook portion 59 are arranged at predetermined positions inside the tubular plate portion 24b, the spring portion 55 is attached to both ends 55a and The spring portion 55 and the circular curved portion 55b are arranged on the outer side of the tubular plate portion 24b so as to extend along the outer surface of the tubular plate portion 24b. Interference between 56 and cylindrical plate portion 24b is avoided. Further, the expansion and contraction direction of the spring portion 55 is along the outer side surface of the cylindrical plate portion 24, so that the tensile load of the spring portion 55 is reduced. In addition, since the clip portion 50 has a shape of a paper clip in this embodiment, it contacts the inner surface of the cylindrical plate portion 24b so that the fixing of the right locking member 5 is stabilized.

In this way, the right locking member 5 has the clip portion 50 formed at one end portion thereof clipped to the right portion of the ventilation fan frame, and the hook portion 59 formed at the other end portion thereof to the cover main body of the ventilation fan cover 1 . 2, the right part of the ventilation fan cover 1 is fixed to the right part of the ventilation fan frame. In this state, the clip portion 50 and the hook portion 59 are pulled so as to be attracted to each other by the spring portion 55 interposed therebetween. The pulling force of the spring portion 55 fixes the right portion of the ventilation fan cover 1 and the right portion of the ventilation fan frame.

Similarly, the left locking member 4 is used to fix the left portion of the ventilation fan cover 1 to the left portion of the ventilation fan frame.

FIG. 9 is an enlarged side view showing a state in the middle of covering the ventilation fan cover with the fastener attached to the ventilation fan frame removed from the large ventilation fan, and FIG. FIG. 11 is a plan partial cross-sectional view showing a state in the middle of putting the ventilation fan cover on the ventilation fan frame, and FIG. 12 is an enlarged view of the B portion shown in FIG. 11, FIG. 13 is a plan partial sectional view of the ventilating fan cover in the state shown in FIG. 11, and FIG. 14 is a C shown in FIG. FIG. 15 is an enlarged cross-sectional view of a portion, and FIG. 15 is an enlarged front view showing a portion of the ventilation fan cover where the locking tool is locked.

16 is an enlarged side view of the ventilating fan cover in a state of being locked to the ventilating fan frame of the small ventilating fan with a locking tool, and FIG. 17 is an enlarged view of the portion D shown in FIG. 18 is a plan partial cross-sectional view of the ventilating fan cover in the state shown in FIG. 16, and FIG. 19 is an enlarged cross-sectional view of the E portion shown in FIG.

Referring to these figures, the ventilation fan cover 1 is configured to be attachable to ventilation fan frames 11 and 13 of ventilation fans 10 and 12 of two sizes, respectively. The standard for the size of the ventilation fans 10 and 12 is usually the standard for the size of the blades of the propellers 10a and 12a.

The ventilating fan frame 11 of the ventilating fan 10 (hereinafter referred to as the "large ventilating fan 10") according to the larger standard shown in FIGS. It consists of a portion 11a and a tubular plate portion 11b having a square tube shape. A rectangular outer peripheral corner portion 11c is provided between the flat plate portion 11a and the cylindrical plate portion 11b. The end of the cylindrical plate portion 11b opposite to the flat plate portion 11a is an open end. Here, it is assumed that the flat plate portion 11a is formed in a flat plate shape at the front end of the tubular plate portion 11b and arranged in front of the propeller 10a of the ventilation fan 10. As shown in FIG.

Referring to FIG. 9, when attaching the ventilating fan cover 1 to the ventilating fan frame 11, first, the ventilating fan frame 11 is removed from the base frame 10b of the ventilating fan 10, and the left rear end portion of the cylindrical plate portion 11b of the ventilating fan frame 11 is attached to the left. The clip portion 40 (see FIG. 10) of the locking device 4 is clamped, and the clip portion 50 of the right locking device 5 is clamped to the right rear end portion of the tubular plate portion 11b.

Referring to FIG. 10, after that, the ventilation fan frame 11 is returned to the predetermined position of the ventilation fan 10, and the clip portions 40, 50 of the fasteners 4, 5 arranged inside the tubular plate portion 11b of the ventilation fan frame 11 are attached to the ventilation fan. 10 and the tubular plate portion 11b of the ventilating fan frame 11. As shown in FIG.

In a state in which the fasteners 4 and 5 are provided on the ventilation fan 10 in this manner, the outer periphery cover portion 24 is aligned with the outer periphery corner portion 11c of the ventilation fan frame 11 by aligning the outer periphery corner portion 24c of the outer periphery cover portion 24 of the ventilation fan cover 1 with the outer periphery corner portion 11c of the ventilation fan frame 11. The state of contact with the ventilation fan frame 11 is secured. The contact state is a state in which the flat plate portion 24a of the outer peripheral cover portion 24 and the flat plate portion 11a of the ventilation fan frame 11 are in close contact or proximity, or a tubular plate portion 24b of the outer peripheral cover portion 24 and a tubular plate portion of the ventilation fan frame 11. 11b are in close proximity or proximity, or both. It should be noted that they do not necessarily have to be in contact with each other in the entire circumferential direction of the ventilation fan frame 11, and the outer peripheral cover portion 24 and the ventilation fan frame 11 may be in contact with each other in a part of the entire circumferential direction. Further, as described above, the cover body 2 of the ventilation fan cover 1 is made of synthetic resin or the like, so that the front and back surfaces of the cover body 2 are smooth surfaces without unevenness, so that the outer peripheral cover portion 24 and the ventilation fan frame 11 can be separated from each other. can ensure the contact state.

If there is a gap between the ventilation fan cover 1 and the ventilation fan frame 11, oil-containing air is directly sucked into the propeller 10a of the ventilation fan 10 from this gap without passing through the filter 3 of the intake ports 22, 22a, and the ventilation fan cover is attached. Even if it is, the ventilation fan will be dirty. Therefore, by reducing the gap between the ventilation fan cover 1 and the ventilation fan frame 11 as described above, it is possible to suppress oil contamination from the gap of the ventilation fan cover.

In addition, even when the air passes through the intake ports 22 and 22a, the oil contained in the air may not be completely removed by the filter 3. In this case, the air contacts the back side of the ventilation fan cover, causing the oil to spread to the back side. The oil content in the air that adheres and passes through the propeller 10a may be reduced. In the ventilation fan cover 1, as described above, the inner peripheral cover portion 23 and the outer peripheral cover portion 24 are stepped so that the inner peripheral cover portion 23 protrudes forward from the outer peripheral cover portion 24 when viewed from the front. By being connected, when the outer peripheral cover part 24 is put on the ventilation fan frame 11, the surface area of the back surface of the ventilation fan cover 1 that contacts the intake air between the air intake ports 22, 22a and the propeller 10a is not stepped. will increase in comparison. As a result, while the oil-containing air passes through the intake ports 22, 22a and reaches the propeller 10a of the ventilation fan 10, the amount of oil adhering to the air mixed with the intake air can be increased. Further, since the air intake ports 22, 22a are far away from the propeller 10a in this way, the suction pressure to the propeller 10a, which leads to dirt on the filter 3, does not concentrate on the central portions of the air intake ports 22, 22a. Oil stains can be evenly removed over the entire wide range of 22a.

From this state, hold the hook portion 49 of the left locking member 4 by hand, move it to the left locking portion 25 of the ventilation fan cover 1, and insert it inside the ventilation fan cover 1 through the locking hole 25a. Likewise, holding the hook portion 59 of the right locking member 5, move it to the right locking portion 26 of the ventilation fan cover 1 and insert it into the ventilation fan cover 1 through the locking hole 26a. As a result, locking of the ventilation fan cover 1 to the ventilation fan frame 11 via the left and right locking tools 4 and 5, that is, attachment of the ventilation fan cover 1 to the ventilation fan 10 is completed.

A mode of operation of each part of the locking tools 4, 5 when locking the hook parts of the locking tools 4, 5 to the locking parts 25, 26 of the ventilation fan cover 1 will be described. Here, only the right locking device 5 will be described as a representative of the two locking devices 4 and 5 .

The locking member 5 with the clip portion 50 sandwiched between the ventilation fan frame 11 is held by hand, and the hook portion 59 is inserted into the locking hole 26a of the locking portion 26 using the action of the locking member 5, which will be described later. to lock.

Here, since the tubular plate portion 11b of the ventilation fan frame 11 of the large ventilation fan 10 is close to or in close contact with the tubular plate portion 24b of the outer peripheral cover portion 24 of the ventilation fan cover 1, the tubular plate portion 11b is sandwiched in the horizontal direction. The clip portion 50 of the locking tool 5 and the locking hole 26a into which the hook portion 59 is inserted are close to each other. However, partly because the outer cover portion 24 is formed one step behind the inner cover portion 23, the rear end portion of the cylindrical plate portion 11b of the ventilation fan frame 11 is located at the rear end of the outer cover portion 24 (that is, the ventilation fan The rear end of the cover 1 protrudes rearward. That is, there is a considerable distance in the front-rear direction between the end portion 51 of the clip portion 50 and the locking hole 26a.

In this state, as the hook portion 59 is pulled forward to move to the locking hole 26a, the spring portion 55 is pulled forward and elongated on the outer side of the cylindrical plate portion 24b. As a result, the second bent portion 57 reaches a position corresponding to the outer peripheral corner portion 24c, and from this state, the fifth straight portion 58 is arranged along the flat plate portion 24a, and the hook portion 59 is inserted into the locking hole 26a. can be delivered to

Further, at this time, the distance and relative direction between the spring portion 55 and the second bent portion 57 are adjusted by the elastic deformation of the circular curved portion 56 as described above, and the second bent portion 57 is moved to the outer peripheral corner portion 24c. can be placed in the optimum position for

In this way, by inserting the hook portion 59 inside the ventilation fan cover 1 through the locking hole 26 a of the right locking portion 26 , the right portion of the ventilation fan cover 1 is attached to the right portion of the ventilation fan frame 11 by the right locking member 5 . The locking work is completed.

On the other hand, with the clip portion 49 of the left locking member 4 as well, when the left rear end portion of the cylindrical plate portion 11b of the ventilation fan frame 11 is held between the clip portions 49 and the hook portion 49 is pulled forward, the spring portion 45 is released. Stretched. By inserting the hook portion 49 thus moved into the inside of the ventilation fan cover 1 through the locking hole 25 a of the left locking portion 25 , the left portion of the ventilation fan cover 1 is secured to the ventilation fan frame 11 by the left locking tool 4 . The work to lock the left part is completed.

In this way, when the work of locking the ventilation fan cover 1 to the ventilation fan frame 11 by the left and right locking tools 4 and 5 is completed, the attachment of the ventilation fan cover 1 to the large ventilation fan 10 is completed.

When the ventilating fan cover 1 is removed from the ventilating fan frame 11, the clip portion 50 of the right locking member 5 clamps the cylindrical plate portion 11b of the ventilating fan frame 11 while the fifth straight portion 58 and the second bent portion are bent. By holding the portion 57, the fourth linear portion 56b, or the like and pulling the fifth linear portion 58 forward, the hook portion 59 can be easily extracted forward and outward from the locking hole 26a. The hook portion of the left locking member 4 is similarly pulled out from the locking hole 25a. In this way, by removing the locking tools 4 and 5 from the ventilation fan cover 1, the locking of the ventilation fan cover 1 to the ventilation fan frame 11 is released, and the ventilation fan cover 1 is pulled forward to be easily removed from the ventilation fan cover 1. - 特許庁be able to.

After the ventilating fan cover 1 is removed, the latches 4 and 5 remain in a state in which the respective clip portions 40 and 50 are sandwiched between the ventilating fan frame 11 and are still provided on the ventilating fan 10 . Therefore, these can also be used to lock the new ventilation fan cover 1 to the ventilation fan frame 11 after replacement.

The ventilating fan frame 13 of the ventilating fan 12 according to the smaller standard shown in FIGS. 13a and a tubular plate portion 13b having a square tubular shape. A rectangular outer peripheral corner portion 13c is formed between the flat plate portion 13a and the cylindrical plate portion 13b. The end of the cylindrical plate portion 13b opposite to the flat plate portion 13a is an open end. Here, it is assumed that the flat plate portion 13a is formed in a flat plate shape at the front end of the tubular plate portion 13b and arranged in front of the propeller 12a of the small ventilation fan 12. As shown in FIG.

When attaching the ventilation fan cover 1 to the small ventilation fan 12, first, as in the case of the large ventilation fan 10, the clip portions 40 and 50 of the left and right locking members 4 and 5 are sandwiched between the left and right rear ends of the ventilation fan frame 13, In addition, the small ventilating fan 12 is provided with the right and left locking tools 4 and 5 in a state in which both the clip parts 40 and 50 are held between the ventilating fan frame 13 and the base frame 12b of the ventilating fan 12.例文帳に追加

From this state, the ventilating fan cover 1 is put on the ventilating fan frame 13. In this case, the outer peripheral corner portion 23c of the inner peripheral cover portion 23 and the outer peripheral corner portion 13c of the ventilating fan frame 13 are brought together to form the inner peripheral cover portion. 23 and the ventilation fan frame 13 are brought into contact with each other.

Here, the state in which the inner circumference cover portion 23 and the ventilation fan frame 13 are in contact means a state in which the flat plate portion 23a and the flat plate portion 13a are in close contact or close to each other, or a state in which the tubular plate portion 23b and the tubular plate portion 13b are in close contact or close proximity. It may be in a state where it is closed or in both of these states, and it may be in a state in which it does not necessarily extend over the entire circumference of the inner peripheral cover portion 23 but is in contact with the ventilating fan frame 13 partially. Since the inner peripheral cover portion 23 and the ventilation fan frame 13 are in contact with each other in this way, the air containing oil can flow from the gap between the inner peripheral cover portion 23 and the ventilation fan frame 13 to the propeller 12a of the ventilation fan 12 without passing through the filter 3. The fact that oil stains on the ventilation fan 12 due to the inhalation of the oil is suppressed, and that the smooth surface of the inner peripheral cover portion 23 makes it easy to secure the contact state will be described with respect to the outer peripheral cover portion 24. As I did.

In this way, not only when covering the ventilation fan frame 11 of the large ventilation fan 10 with the ventilation fan cover 1, but also when covering the ventilation fan frame 13 of the small ventilation fan 12 with the ventilation fan cover 1, the gap between the ventilation fan cover 1 and the ventilation fan frame is eliminated. is reduced, in either case, the effect of removing oil from the intake air by the filter 3 can be sufficiently obtained by putting the ventilation fan cover 1 on.

With the ventilating fan cover 1 placed over the ventilating fan frame 13 in this manner, the hook portion 59 of the right locking member 5 is pulled forward and inserted into the locking hole 26a. The hook portion 49 (see FIG. 10) of the left locking tool 4 is similarly inserted into the locking hole 25a.

Here, the tubular plate portion 13b of the ventilation fan frame 13 covered with the inner peripheral cover portion 23 is considerably farther from the tubular plate portion 24b of the outer peripheral cover portion 24 arranged on the outer peripheral side than the inner peripheral cover portion 23. Keep your distance. Regarding the right latch 5, the spring portion 55 is stretched forward right from the clip portion 50 that clamps the right portion of the tubular plate portion 13b of the ventilation fan frame 13, and the spring portion 55 is temporarily attached to the tubular portion of the outer peripheral cover portion 24. After being placed on the right outer side of the right portion of the plate portion 24b, the hook portion 59 is moved leftward across the outer peripheral corner portion 24c and pulled to the locking hole 26a of the right locking portion 26 on the flat plate portion 24a. need to come

That is, when the outer peripheral cover portion 24 is aligned with the ventilation fan frame 11 as described above, the spring portion 55 is stretched in the longitudinal direction along the cylindrical plate portion 24b of the outer peripheral cover portion 24. and the cylindrical plate portion 24b. However, when the inner peripheral cover portion 23 is placed along the ventilation fan frame 13, the pulling direction of the spring portion 55 is in a direction intersecting the tubular plate portion 24b of the outer peripheral cover portion 24, and the spring portion 55 and the tubular plate portion 24b are pulled. may interfere with

Here, by forming the above-described first bent portion 53, the interference between the cylindrical plate portion 24b and the flange portion 24d of the outer peripheral cover portion 24 and the spring portion 55 of the right locking member 5 is alleviated. The spring portion 55 can be pulled without any force. By pulling the spring portion 55 in this manner, the second bent portion 57 is arranged at a position corresponding to the outer peripheral corner portion 24c, and the hook portion 59 can be inserted into the locking hole 26a.

As described above, the ventilating fan cover 1 is at least an inner peripheral cover having an outer peripheral corner portion 23c corresponding to the outer peripheral corner portion 13c of the ventilating fan frame 13 so that it can be placed over the ventilating fan frame 13 having a predetermined standard. and an outer peripheral corner portion 24c corresponding to the outer peripheral corner portion 11c of the ventilation fan frame 11 so that it can be placed over the ventilation fan frame 11 configured with a predetermined standard larger than the ventilation fan frame 13. The first cover portion 23 and the second cover portion 24 are connected in a stepped manner.

With this configuration, the ventilating fan cover 1 can be attached to both the ventilating fan frame 13 having a predetermined standard and the ventilating fan frame 11 having a predetermined standard larger than the ventilating fan frame 13 . The ventilation fan frames 11 and 13 are positioned by simply matching the outer peripheral corner portions 23c and 24c of the respective cover portions 23 and 24 with the outer peripheral corner portions 11c and 13c of the ventilation fan frames 11 and 13, respectively. A gap between the frames 11 and 13 and the ventilation fan cover 1 can be reduced. By forming the inner peripheral cover part 23 and the outer peripheral cover part 24 having such a function in a stepped manner, which does not require complicated processing, the standard ventilating fan 12 provided with the ventilating fan frame 13 can also be used. To achieve the object of the invention to provide a ventilating fan cover 1 which can be attached to a standard ventilating fan 10 having a ventilating fan frame 11 and which can suppress contamination of the ventilating fan no matter which one is attached to the cover at a low cost.

The ventilation fan cover 1 is provided with intake ports 22, 22a, and the inner peripheral cover portion 23 is formed so as to surround the intake ports 22, 22a when the intake ports 22, 22a are viewed directly from the outside. The outer peripheral cover portion 24 is formed to surround the inner peripheral cover portion 23 , and the inner peripheral cover portion 23 is formed to protrude forward from the outer peripheral cover portion 24 .

With this configuration, when the inner peripheral cover portion 23 is placed on the ventilation fan frame 13, the outer peripheral cover portion 24 covers the ventilation fan frame 13 and the inner peripheral cover when the intake ports 22 and 22a are viewed directly from the outside. Since it is arranged so as to surround the portion 23, the state in which the inner peripheral cover portion 23 covers the ventilation fan frame 13 without any gap is not hindered. On the other hand, when covering the ventilation fan frame 11 with the outer peripheral cover portion 24, the inner peripheral cover portion 23 is placed on the front side of the ventilation fan frame 11 and the outer peripheral cover portion 24 when the intake ports 22 and 22a are viewed directly from the outside. Therefore, the state in which the outer peripheral cover part 24 covers the ventilation fan frame 11 without any gap is not hindered. That is, the stepped inner peripheral cover portion 23 and outer peripheral cover portion 24 having the above-described functions are constructed by a method that does not require complicated processing, and the above-described effects of the ventilating fan cover 1 can be reliably obtained. . Also, even if the air passes through the air intake, the oil contained in the air may not be completely removed by the filter. Although the amount of oil in the air passing through may be reduced, in the present invention, the stepped shape prevents the first cover portion from stepping when the second cover portion is placed on the second ventilation fan frame. Projects from the second cover part, the surface area of the back surface of the ventilation fan cover that contacts the intake air between the intake port and the propeller increases compared to the case where the stepped shape is not used. It is possible to increase the adhesion amount of oil in the air mixed with the intake air while passing through the intake port and reaching the propeller of the ventilation fan. Furthermore, since the air intake is far away from the propeller in this way, oil stains are not concentrated in the central portion of the air intake, and oil stains can be evenly removed from the entire wide area of the air intake.

Further, the ventilating fan cover 1 has engaging portions 25 and 26 capable of engaging the engaging tools 4 and 5 engaged with the ventilating fan frame 11 or the ventilating fan frame 13 .

With this configuration, locking and removal of the locking members 4 and 5 to the locking portions 25 and 26 of the ventilation fan cover 1 can be easily performed.

In addition, the ventilation fan cover 1 has an inner peripheral cover portion 23 and an outer peripheral cover portion 24 formed of synthetic resin.

With this configuration, the surfaces of the inner peripheral cover portion 23 and the outer peripheral cover portion 24 made of synthetic resin can be made smooth without unevenness, and the ventilating fan frame 13 and the inner peripheral cover portion 23 placed thereon can be separated. Also, the ventilation fan frame 11 and the outer peripheral cover portion 24 placed thereon can be brought into contact with each other with a reduced gap. Therefore, it is possible to further reduce the problem that the oil-mixed air is directly sucked into the ventilation fans 10, 12 through the gap between the ventilation fan cover 1 and the ventilation fan frames 11, 13 without passing through the filter 3 of the intake ports 22, 22a. In both cases of covering the ventilation fan frame 11 and covering the ventilation fan frame 13, the effect of protecting the ventilation fans 10 and 12 from dirt by the ventilation fan cover 1 can be stabilized.

Further, the ventilation fan cover 1 is formed with outer peripheral ribs 27a to 27e (outer peripheral rib group 27) on the outer peripheral cover portion 24. As shown in FIG.

With this configuration, the outer peripheral cover portion 24 is reinforced by the outer peripheral rib group 27 . Further, when the outer peripheral cover part 24 is put on the ventilation fan frame 11, more oil contained in the intake air can be adhered to the rear side surface of the cover body 2 as the surface area is increased by the outer peripheral rib group 27.例文帳に追加Further, an outer peripheral rib group 27 protrudes on the front side of the cover body 2, and the oil contained in the intake air to the ventilation fan 10 flows from the intake ports 22, 22a, for example, through the inner peripheral cover portion 23 to the surrounding outer peripheral cover portion 24. , such oil can be received by the convex outer peripheral rib group 27 . In this manner, when the outer peripheral cover portion 24 is placed on the ventilation fan frame 11, the outer peripheral ribs 27a to 27e (peripheral rib group 27) formed in the outer peripheral cover portion 24 are formed to introduce the air into the intake ports 22, 22a. A large amount of oil contained in the front air can be adhered to the surface of the ventilation fan cover 1, the amount of oil adhering to the ventilation fans 10, 12 is reduced accordingly, and the ventilation fan cover 1 protects the ventilation fans 10, 12 against dirt. The effect can be further enhanced. Since the outer peripheral ribs 27a to 27e (outer peripheral rib group 27) formed on the outer peripheral cover portion 24 are used as means having such an oil receiving function, the cost of the ventilating fan cover 1 can be further reduced.

Further, the ventilation fan cover 1 has the filter 3 attached so as to cover the intake ports 22 and 22a arranged so as to be surrounded by the inner peripheral cover portion 23 in a front view.

With this configuration, oil stains on the ventilation fans 10 and 12 due to oil-containing air passing through the filter 3 can be prevented regardless of whether the ventilation fan cover 1 is attached to the ventilation fan frame 11 or to the ventilation fan frame 13. A suppressing effect is obtained. Therefore, the effect of preventing the ventilation fans 10 and 12 from being soiled, which is originally required for the ventilation fan cover 1, can be provided to both the large ventilation fan 10 having the ventilation fan frame 11 and the small ventilation fan 12 having the ventilation fan frame 13.例文帳に追加

In addition, in order to lock the ventilation fan cover put on the ventilation fan frame to the ventilation fan frame, the locking member is not limited to one made of a single linear body such as a wire. It is also possible to use a double-sided tape, a hook-and-loop fastener, a magnet, or the like.

Further, the location of the ventilation fan cover to which the locking member is locked is not limited to the location corresponding to the locking portion shown in FIG. 1 and the like.

Furthermore, the above description assumes that the propeller shaft of the ventilating fan is arranged in the front-rear direction and the ventilating fan cover is attached to the front of the ventilating fan frame. It is also possible that the ventilation fan is installed on the ceiling, the propeller axis is vertical, and the ventilation fan cover is attached below the ventilation fan frame. In other words, the ventilating fan cover can correspond to any arrangement of the ventilating fan frame.

Furthermore, the material of the cover main body of the ventilating fan cover is not limited to the synthetic resin as described above, and may be, for example, an aluminum foil molding that has been commonly used as a ventilating fan cover.

Furthermore, although the ventilating fan cover 1 described above has a specific shape, it is not limited to this. For example, the ventilation fan cover 1 can be attached to ventilation fans 10 and 12 of two standards, that is, the two cover portions 23 and 24 are stepped so as to cover the ventilation fan frames 11 and 13 of each size. Although it is formed to be connected, it may be capable of being attached to ventilation fans of three or more standards. That is, a plurality of cover portions each having an outer peripheral corner portion corresponding to the outer peripheral corner portion of each ventilation fan frame are formed so as to cover the ventilation fan frame of each size, and the plurality of cover portions are connected to each other in a stepped manner. It is something to do. However, in the case of three or more cover portions, each cover portion may be connected in a stepped manner, or at least one step is formed by connecting at least two cover portions in a stepped manner. By doing so, the effect of the present invention can be exhibited.

Further, although the ventilating fan cover 1 has ribs of a specific shape, they may be omitted or ribs of another shape may be formed. Also, the method of attaching the filter to the intake port is not limited to the configuration described above.

1 ventilator cover 2 cover body 3 filter 4 lock 5 lock 10 large ventilator 11 ventilator frame (second ventilator frame)
11a Flat plate portion 11b Cylindrical plate portion 11c Peripheral corner portion 12 Small ventilation fan 13 Ventilation fan frame (first ventilation fan frame)
13a Flat plate portion 13b Tubular plate portion 13c Outer peripheral corner portion 21 Window frame portion 21a Central rib 22 Intake port 22a Intake port 23 Inner peripheral cover portion (first cover portion)
23a Flat plate portion 23b Cylindrical plate portion 23c Peripheral corner portion 24 Peripheral cover portion (second cover portion)
24a Flat plate portion 24b Cylindrical plate portion 24c Outer peripheral corner portion 25 Engagement portion 25a Engagement hole 26 Engagement portion 26a Engagement hole 27 Outer peripheral rib group 27a Rib 27b Rib 27c Rib 27d Rib 27e Rib

TECHNICAL FIELD The present invention relates to a ventilating fan cover, and more particularly to a ventilating fan cover to be put on a ventilating fan frame.

2. Description of the Related Art Conventionally, a ventilating fan cover as described in Patent Document 1 is known. An embodiment in which this conventional ventilation fan cover is attached to a ventilation fan will be described.

20A and 20B are diagrams showing a conventional mounting structure of a ventilation fan cover to a ventilation fan frame, in which (a) is a perspective view showing a state in the middle of mounting, and (b) is a state in which locking has been completed with a locking tool. It is a perspective view showing.

Referring to the figure, for example, a ventilation fan 8 is provided on a wall facing the room of a house. The ventilation fan 8 is composed of a base frame 80 attached to the wall, a propeller 81, and a ventilation fan frame 82 covering the propeller 81. - 特許庁The ventilation fan frame 82 is provided so as to protrude from the wall on which the base frame 80 is attached. Assuming that this projecting direction is forward, the front end of the ventilation fan frame 82 is formed with a flat plate portion 82a that is quadrangular (usually square) in front view. A suction port 83 having a circular shape when viewed from the front is opened in the flat plate portion 82a. The intake port 83 is arranged in front of the propeller 81 so as to face the propeller 81 . Further, the ventilating fan frame 82 is formed with a cylindrical plate portion 82b extending rearward from the upper, lower, right and left edges of the flat plate portion 82a. A rectangular outer peripheral corner portion (bent portion) 82c is provided between the flat plate portion 82a and the cylindrical plate portion 82b.

The ventilation fan cover 7 is composed of a cover body 71 and a filter 70 made of nonwoven fabric. A flat plate portion 73 is formed on the cover body 71 , and a window frame portion 72 is formed so as to protrude forward from the flat plate portion 73 . The filter 70 is attached to the inner surface of the window frame portion 72, and a pair of upper and lower intake ports 72a and 72b formed in the window frame portion 72 are covered with the filter 70 from the inside. Locking portions 77 having locking holes 77a are formed at appropriate locations of the flat plate portion 73 of the cover body 71 on both left and right sides of the window frame portion 72 .

The cover main body 71 is formed with side plate portions 74 having an inverted U shape when viewed from the front and extending rearward from the right end, the left end, and the upper end of the flat plate portion 73 which forms the four sides of a square when viewed from the front. An outer peripheral corner portion 75 is formed between the flat plate portion 73 and the side plate portion 74 . The outer peripheral corner portion 75 is aligned with the outer peripheral corner portion 82c of the ventilation fan frame 82, the side plate portion 74 of the ventilation fan cover 7 covers the outer surface of the cylindrical plate portion 82b of the ventilation fan frame 82, and the flat plate portion 73 covers the flat plate portion 82a of the ventilation fan frame 82. The covered state is defined as a state in which the ventilation fan cover 7 covers the ventilation fan frame 82 .

Further, the cover body 71 is formed with a flap 76 extending downward from the flat plate portion 73 to cover the lower end portion of the ventilation fan frame 82 . The boundary line between the flat plate portion 73 and the flap 76 is a folding line 76a, and the angle of the flap 76 with respect to the ventilation fan frame 82 can be adjusted by adjusting the folding angle at the folding line 76a.

The ventilator cover locking device 9 (hereinafter simply “locking device 9”) comprises a clip 91 , a spring 92 and a hook 93 . The clip 91 is formed by bending a steel plate into a U-shape. The spring 92 is a coiled tension spring, both ends of which are ring-shaped, and one end of the hook 93 is also formed with a ring-shaped portion 93a. A ring-shaped portion at one end of the spring 92 is engaged with a locking pawl portion 91a formed on the clip 91, and a ring-shaped portion at the other end of the spring 92 is engaged with a ring-shaped portion 93a of the hook 93, whereby the clip 91, Three members, a spring 92 and a hook 93, are connected.

When attaching the ventilation fan cover 7 to the ventilation fan 8 , first, the ventilation fan frame 82 is removed from the base frame 80 of the ventilation fan 8 . The clip 91 of the locking member 9 is clipped to the rear edge of the opening of the ventilation fan frame 82 thus opened, and in this state, the ventilation fan frame 82 is returned to its original position covering the propeller 81 . As a result, the clip 91 is sandwiched between the base frame 80 and the ventilation fan frame 82, and the ventilation fan 8 is provided with the locking member 9 having the hook 93 as a free end. Although not shown in FIG. 20, a similar locking member is also provided on the left and right opposite sides of the ventilation fan frame 82 .

From this state, referring to FIG. 20(a), the ventilation fan cover 7 is put on the ventilation fan frame 82 of the ventilation fan 8 while being aligned as described above. Further, referring to FIG. 20(b), the spring 92 of the locking member 9 attached to the ventilation fan frame 82 is pulled forward, and the hook 93 is inserted into the locking hole 77a of the locking portion 77. As shown in FIG. The hooks of a locking device (not shown) on the opposite side of the locking device 9 are inserted into the locking holes of the ventilation fan cover 7 in the same manner. In this way, the left and right portions of the ventilation fan cover 7 are locked to the left and right portions of the ventilation fan frame 82 of the ventilation fan 8 via the locking members 9 and locking members (not shown), and the ventilation fan cover 7 is attached to the ventilation fan 8. is completed.

Preliminary locking portions 78 and 79 are also provided above and below the window frame portion 72 of the ventilation fan cover 7, and the left and right locking portions including the locking portion 77 are provided with hooks 93 of the locking tool 9. These latching portions 78 and 79 are used when it is difficult to hang.

JP-A-2000-254427

However, there are various standards for the ventilating fan frame according to the size of the propeller of the ventilating fan. It is formed and configured to correspond to the ventilation fan frame 82 of a predetermined standard, and a ventilation fan cover with a different configuration must be prepared for the ventilation fan frame of other standards. In other words, it is necessary to provide ventilating fan covers of various standards so as to correspond to individual standards of ventilating fan frames.

If the ventilation fan cover 7 is attached in a state in which the inner surface (lower surface) of the upper end of the side plate portion 74 is in contact with the outer surface (upper surface) of the upper end of the ventilation fan frame of another standard smaller than the standard of the ventilation fan frame 82, Since the size of the ventilation fan cover 7 differs greatly from that of a small ventilation fan of another standard, there is a large gap between the outer surfaces of the left and right sides of the cylindrical plate portion of the ventilation fan frame and the inner surfaces of the left and right sides of the side plate portion 74 of the ventilation fan cover 7. A gap is created, and air containing oil is directly sucked into the ventilation fan through this gap without passing through the filter at the intake port, so the ventilation fan becomes dirty.

SUMMARY OF THE INVENTION An object of the present invention is to provide a ventilation fan cover capable of providing a desired protective effect against dirt.

To achieve the above objects, the present invention provides a ventilation fan cover, which includes at least an intake port, a first cover part, and an outer peripheral corner part of the ventilation fan frame so as to be able to cover the ventilation fan frame. and a second cover portion having an outer peripheral corner portion. The first cover portion is formed to surround the air intake port when the air intake port is viewed directly from the outside, and the second cover portion is formed to surround the air intake port. It is formed so as to surround the first cover part, and the second cover part can absorb the oil in the intake air on the back side and receive the oil that has reached the first cover part on the front side. , forming ribs.

With this configuration, the second cover portion is reinforced by the ribs. In addition, when the second cover part is placed on the second ventilation fan frame, the ribs increase the surface area of the rear side surface, so that more oil contained in the intake air can adhere. Furthermore, ribs protrude on the front side, and when oil contained in the air intake to the ventilation fan reaches the surrounding second cover part through the first cover part from the air inlet, for example, such oil is removed. It can be received by convex ribs.

As described above, according to the present invention, the second cover portion is reinforced with ribs. Further, in the state where it is covered with the ventilation fan frame, the ribs increase the surface area of the rear side surface, so that a large amount of oil contained in the intake air can be adhered. Furthermore, ribs protrude on the front side, and when oil contained in the air intake to the ventilation fan reaches the surrounding second cover part through the first cover part from the air inlet, for example, such oil is removed. It can be received by convex ribs. In this manner, when the second cover portion is placed over the second ventilation fan frame, the ribs formed on the second cover portion allow the oil contained in the air before it is introduced into the intake port to be removed by the surface of the ventilation fan cover. A large amount of oil can be attached, and the amount of oil adhering to the ventilation fan can be reduced accordingly, and the effect of protecting the ventilation fan against contamination by the ventilation fan cover can be enhanced. Further, since the rib formed on the second cover portion is used as the means having such an oil receiving function, it is possible to reduce the cost of the ventilating fan cover.

1 is a front view of a ventilating fan cover locking device (hereinafter simply "locking device") and a ventilating fan cover of the present invention; FIG. 2 is an enlarged view of part A shown in FIG. 1; FIG. FIG. 2 is a rear view of the ventilation fan cover shown in FIG. 1; FIG. 2 is an enlarged side view of the ventilation fan cover shown in FIG. 1; FIG. 2 is an enlarged plan partial cross-sectional view of the ventilation fan cover shown in FIG. 1; FIG. 2 is an enlarged bottom view of the ventilation fan cover shown in FIG. 1; It is a side view of a locking tool. It is a top view of a locking tool. FIG. 10 is an enlarged side view showing a state in the middle of attaching a locking member to a ventilation fan frame removed from a large ventilation fan and putting a ventilation fan cover over it. FIG. 4 is a plan partial cross-sectional view showing a state in the middle of putting a ventilation fan cover over the ventilation fan frame attached to the large ventilation fan with the fasteners attached. Fig. 10 is an enlarged side view of the ventilation fan cover in a state of being locked to the ventilation fan frame of the large ventilation fan by locking tools; 12 is an enlarged view of a portion B shown in FIG. 11; FIG. FIG. 12 is a plan partial cross-sectional view of the ventilation fan cover in the state shown in FIG. 11; 14 is an enlarged cross-sectional view of a portion C shown in FIG. 13; FIG. FIG. 4 is an enlarged front view showing a portion of the ventilation fan cover to which the locking tool is locked; 4 is an enlarged side view of the ventilating fan cover in a state of being locked to the ventilating fan frame of the small ventilating fan by a locking tool. FIG. 17 is an enlarged view of part D shown in FIG. 16. FIG. FIG. 17 is a plan partial cross-sectional view of the ventilation fan cover in the state shown in FIG. 16; 19 is an enlarged cross-sectional view of the E portion shown in FIG. 18; FIG. Fig. 10 is a view showing a conventional mounting structure of a ventilation fan cover to a ventilation fan frame, (a) being a perspective view showing a state in the middle of being mounted, and (b) being a perspective view showing a state where locking has been completed with locking tools. be.

FIG. 1 is a front view of a ventilation fan cover locking device (hereinafter simply referred to as a "locking device") and a ventilation fan cover of the present invention, FIG. 2 is an enlarged view of part A shown in FIG. 1, and FIG. 1 is a rear view of the ventilation fan cover shown in FIG. 1, FIG. 4 is an enlarged side view of the ventilation fan cover shown in FIG. 1, and FIG. 5 is an enlarged plan partial cross-section of the ventilation fan cover shown in FIG. 6 is an enlarged bottom view of the ventilation fan cover shown in FIG. 1. FIG.

The arrow F shown in these figures indicates forward, the arrow L indicates left, the arrow R indicates right, and the arrow U indicates upward. That is, the direction opposite to arrow F is backward, and the direction opposite to arrow U is downward.

Referring to these figures, the ventilation fan cover 1 includes a cover body 2 and a filter 3, and a pair of locking members 4 and 5 can be attached to the cover body 2. As shown in FIG.

The cover body 2 is formed by vacuum forming a polyvinyl chloride sheet having a thickness of about 1 mm, for example. Moreover, it has flexibility (flexibility) that allows it to be deformed along the locking tools 4 and 5 when it is pressed by the locking tools 4 and 5, for example. Furthermore, the front and back surfaces are smooth surfaces with no irregularities or wrinkles, and when attached to the ventilation fan frame, the gap between the fan frame and the ventilation fan frame can be reduced to ensure a contact state.

A window frame portion 21 having a substantially rectangular shape in a front view is formed on the cover body 2 . A central rib 21a is formed in the vertical center of the window frame 21 so as to extend in the left-right direction and protrude forward. The central rib 21a is the foremost end of the ventilating fan cover 1, and the window frame 21 protrudes forward in a pentagonal shape with the central rib 21a as the apex when viewed from the side.

Since the cover body 2 of the ventilating fan cover 1 is a synthetic resin molding as described above, the strength is ensured by forming such a central rib 21a.

Thus, in the window frame portion 21, the upper intake port 22 is opened at the upper inclined surface portion that is inclined rearward and upward from the central rib 21a to the upper end of the window frame portion 21. A lower intake port 22a is provided on a lower inclined surface portion that is inclined rearwardly and downwardly to the lower end of .

As shown in FIG. 3, the filter 3 is attached to the rear surface of the window frame portion 21, and the filter 3 covers both air inlets 22 and 22a. With this configuration, air containing oil generated during cooking passes through the intake ports 22 and 22a, and after the oil is removed by the filter 3, the air passes through the ventilation fan. The filter 3 is made of a material suitable for removing oil in the air, such as non-woven fabric.

An inner peripheral cover portion (first cover portion) 23 is formed so as to surround the window frame portion 21 when viewed from the front (that is, when the intake ports 22 and 22a are viewed directly from the outside). The inner peripheral cover portion 23 has a flat plate-shaped flat plate portion 23a, and a substantially square tubular cylindrical plate portion 23b extending rearward from the outer peripheral edge of the flat plate portion 23a. The upper end of the window frame portion 21 and the upper end of the inner peripheral cover portion 23 are flush with each other, and the flat plate portion 23a is formed in a substantially U shape when viewed from the front.

Between the flat plate portion 23a and the tubular plate portion 23b, that is, a portion that is the outer peripheral edge of the flat plate portion 23a and the front edge of the tubular plate portion 23b forms a rectangular outer peripheral corner portion 23c. This outer peripheral corner portion 23c is formed corresponding to the outer peripheral corner portion 13c of the ventilation fan frame 13 of the small ventilation fan 12, which will be described later.

Further, an outer peripheral cover portion (second cover portion) 24 is formed so as to surround the inner peripheral cover portion 23 when viewed from the front (that is, when the intake ports 22 and 22a are viewed from the front). The outer peripheral cover portion 24 has a flat plate-shaped flat plate portion 24a and a substantially square tube-shaped cylindrical plate portion 24b extending rearward from the outer peripheral edge of the flat plate portion 24a.

Between the flat plate portion 24a and the tubular plate portion 24b, that is, a portion that is the outer peripheral edge of the flat plate portion 24a and the front edge of the tubular plate portion 24b is a rectangular outer peripheral corner portion 24c. This outer peripheral corner portion 24c is formed corresponding to the outer peripheral corner portion 11c of the ventilating fan frame 11 of the large ventilating fan 10, which will be described later.

On the other hand, a brim-shaped flange portion 24d is formed at the rear end portion of the tubular plate portion 24b. In the present embodiment, a step in the outer peripheral direction is formed in the front and rear halfway of the tubular plate portion 24b, and the rear portion of the tubular plate portion 24b from this step to the flange portion 24d is the tubular plate portion in front of it. The front part of 24b is expanded. However, the shape of the tubular plate portion 24b is not limited to this. It doesn't have to be.

The flat plate portion 24a extends vertically and horizontally from the rear end of the tubular plate portion 23b, which is the outer peripheral edge of the inner peripheral cover portion 23, and is formed in a substantially square shape when viewed from the front. The flange portion 24d is the rear end portion of the cylindrical plate portion 24b, and is the rear end of the main body cover 2 and the outer peripheral edge in a front view.

Thus, the flat plate portion 24a is formed at the front end of the outer peripheral cover portion 24. As shown in FIG. A tubular plate portion 23b of the inner peripheral cover portion 23 protrudes forward (front side when the intake ports 22, 22a are viewed from the outside) from the inner peripheral end of the flat plate portion 24a of the outer peripheral cover portion 24. As shown in FIG. A flat plate portion 23 a is formed at the front end of the inner peripheral cover portion 23 . That is, in the main body cover 2, the inner peripheral cover portion 23 and the outer peripheral cover portion 24 are formed so as to be connected in a stepped manner, and the inner peripheral cover portion 23 is formed on the inner peripheral side of the outer peripheral cover portion 24. It is configured to protrude forward from the outer peripheral cover portion 24 .

The flat plate portion 24a of the outer peripheral cover portion 24 is formed with a pair of left and right locking portions 25, 26 for locking a pair of left and right ventilation fan cover locking members (hereinafter simply referred to as "locking members") 4, 5. ing.

The left engaging portion 25 has an oval shape elongated in the horizontal direction when viewed from the front and a trapezoidal shape when viewed from above. It is formed in a forward protruding shape at a position substantially at the same position as the central rib 21a in the direction. A flat plate-like portion at the front end of the left locking portion 25 is provided with a locking hole 25a for inserting the hook portion 49 (see FIG. 10) of the left locking tool 4 .

The right engaging portion 26 is formed in a forward protruding shape on the right side of the inner peripheral cover portion 23 and at a substantially vertically central position of the flat plate portion 24a (substantially at the same position as the central rib 21a in the vertical direction). , and has a locking hole 26a for inserting the hook portion 59 (see FIG. 10, etc.) of the right locking member 5, which is configured in the same manner as the left locking portion 25. As shown in FIG.

Further, the flat plate portion 24a of the outer peripheral cover portion 24 is formed with an outer peripheral rib group 27 projecting forward. The outer peripheral rib group 27 includes outer peripheral ribs 27a and 27b formed above the engaging portions 25 and 26 and outer peripheral ribs 27c, 27d and 27e formed below the engaging portions 25 and 26. As shown in FIG.

The outer peripheral ribs 27a and 27b are arranged in parallel, and the outer peripheral rib 27b is arranged on the inner peripheral side of the outer peripheral rib 27a. The outer peripheral ribs 27a and 27b are formed in a substantially inverted U shape when viewed from the front, and extend over the upper half of the flat plate portion 24a which is substantially square when viewed from the front as described above. That is, the outer peripheral ribs 27a and 27b extend in the left-right direction above the inner peripheral cover portion 23, and the left and right end portions of the outer peripheral ribs 27a and 27b are bent to the left and right of the inner peripheral cover portion 23. Extending downward, each lower end portion is arranged to be close to the upper ends of the left locking portion 25 and the right locking portion 26 .

The outer peripheral ribs 27c and 27d are formed vertically symmetrically with respect to the outer peripheral ribs 27a and 27b with the left and right locking portions 25 and 26 interposed therebetween, that is, formed in a substantially U shape when viewed from the front, and substantially a square shape when viewed from the front. extends to the lower half of the flat plate portion 24a.

Below the inner peripheral cover portion 23, the outer peripheral rib 27c of the flat plate portion 24a is arranged below the outer peripheral rib 27d of the flat plate portion 24a, and below the outer peripheral rib 27c, it extends straight in the horizontal direction in a front view. An outer peripheral rib 27e is arranged.

That is, the flat plate portion 24a of the outer peripheral cover portion 24 has two rows of outer peripheral ribs above and below the inner peripheral cover portion 23, and two rows of outer peripheral ribs on the left and right sides of the inner peripheral cover portion 23, respectively. , three rows of outer peripheral ribs are formed below the inner peripheral cover portion 23 .

The outer peripheral rib group 27 increases the strength of the cover body 2 .

Each of the locking devices 4 and 5 shown in FIG. 1 is formed by bending a linear body such as a wire. The fasteners 4 and 5 have the same configuration, and the fastener 5 will be described as a representative of them.

7 is a side view of the locking device, and FIG. 8 is a plan view of the locking device.

The locking member 5 is formed by bending a single linear member such as a wire made of metal such as iron, and has a clip portion 50 at one end and a hook portion at the other end. 59 is formed, and a coiled tension spring portion 55 (hereinafter simply “spring portion 55”) is formed between the clip portion 50 and the hook portion 59 .

The clip portion 50 is formed by bending a linear body into a paper clip shape, and the outer extension portion 50a thereof is arranged outside the ventilation fan frame, and the majority thereof is arranged inside the ventilation fan frame. By doing so, the ventilation fan frame is clamped.

A first bent portion 53 formed by bending a linear body is formed between the outer extending portion 50a of the clip portion 50 and the first end portion 55a of the spring portion 55 . A first straight portion 52 extending from the first bent portion 53 toward the clip portion 50 is connected to the end portion 51 of the clip portion 50 , and the first straight portion 52 extends from the outer extension portion 50 a of the clip portion 50 . It is in a bent state at the end portion 51 . On the other hand, a second straight portion 54 extending from the first bent portion 53 toward the spring portion 55 is connected to a first end (rear end) 55a of the spring portion 55, and the second straight portion 54 is connected to the spring portion 55a. 55 at the first end 55a.

On the other hand, between the spring portion 55 and the hook portion 59, a second bent portion 57 is formed by bending a linear body. A fifth linear portion 58 extends from the second bent portion 57 to the hook portion 59 , and the hook portion 59 is bent in an arc shape toward the fifth linear portion 58 . When the hook portion 59 is arranged inside the ventilating fan cover 1 through the locking hole 26a, the folded shape prevents the hook portion 59 from coming off. Further, the fifth straight portion 58 extending from the locking hole 26a is rotatable with the hook portion 59 serving as a fulcrum of rotation. The extension angle in is adjustable. Furthermore, when moving the locking tool 5 to the locking hole 26a and inserting it, it becomes a knob that can be grasped by a person's fingers.

The second bent portion 57 is bent corresponding to the bent portion of the outer peripheral cover portion 24, which is the joint portion between the outer peripheral end of the flat plate portion 24a and the front end of the tubular plate portion 24b. As a result, even if the fifth linear portion 58 rotates about the hook portion 59 as described above, it does not interfere with the cover main body 2, and the spring portion 55 is arranged along the side of the tubular plate portion 24b. placed.

A circular curved portion 56 is formed between the second bent portion 57 and the spring portion 55 by winding a linear body in a direction substantially orthogonal to the winding direction of the spring portion 55 .

A state in which the third linear portion 56a extends from the circular curved portion 56 to the second end (front end) 55b of the spring portion 55 and is bent from the third linear portion 56a to the spring portion 55 at the second end 55b. It's becoming

On the other hand, the fourth linear portion 56b extends from the circular curved portion 56 to the second bent portion 57. As shown in FIG. The front end portion of the third straight portion 56a and the rear end portion of the fourth straight portion 56b are arranged to overlap each other with the circular curved portion 56 interposed therebetween.

Due to the elastic deformation of the circular curved portion 56, the overlapping area between the third straight portion 56a and the rear end portion of the fourth straight portion 56b changes, and the distance between the second bent portion 57 and the spring portion 55 increases. The angle of the spring portion 55 with respect to the fifth straight portion 58 is adjusted by adjusting and changing the relative angle between the third straight portion 56a and the fourth straight portion 56b.

Here, referring to FIGS. 7 and 8 as well as FIG. 10 described later, when viewed in the axial direction of the spring portion 55, the circumferential direction of the spring portion 55 of each of the first end portion 55a and the second end portion 55b is substantially match. Therefore, if the first end portion 55a and the second end portion 55b are aligned along the outer surface of the tubular plate portion 24b of the outer peripheral cover portion 24 of the ventilation fan cover 1, the spring portion 55 spreads outward from the tubular plate portion 24b. , so as to be arranged without interfering with the tubular plate portion 24b.

The third linear portion 56a and the fourth linear portion 56b extend from the second end portion 55b substantially parallel to the axial direction of the spring portion 55, and as described above, the second end portion 55b extends outside the cylindrical plate portion 24b. If it is made to follow the side surface, the third straight portion 56a and the fourth straight portion 56b will also follow the outer surface of the tubular plate portion 24b.

On the other hand, the circular curved portion 56 overlaps with the spring portion 56 when viewed in the axial direction of the spring portion 55 . That is, when viewed in the axial direction of the spring portion 55, the circular curved portion 56 is arranged on the same side (or the side close to it) as the spring portion 56 via the first end portion 55a and the second end portion 55b. Therefore, if the third linear portion 56a and the fourth linear portion 56b are along the outer side surface of the cylindrical plate portion 24b, the circular curved portion 56 is arranged so as to spread outward from the cylindrical plate portion 24b together with the spring portion 55. , and the cylindrical plate portion 24b.

On the other hand, the clip portion 50 and the hook portion 59 are arranged on the opposite side (or away from the spring portion 55) via the first end portion 55a and the second end portion 55b when viewed in the axial direction of the spring portion 55. placed. The clip portion 50 clamps the ventilation fan frame, and the hook portion 59 is engaged with the engagement portion 26 formed on the flat plate portion 24a of the outer peripheral cover portion 24 of the ventilation fan cover 1. For example, the first end 55a and the second end 55b of the spring portion 55 are arranged inside the cylindrical plate portion 24b.

That is, when the clip portion 50 and the hook portion 59 are arranged at predetermined positions inside the tubular plate portion 24b, the spring portion 55 is attached to both ends 55a and The spring portion 55 and the circular curved portion 55b are arranged on the outer side of the tubular plate portion 24b so as to extend along the outer surface of the tubular plate portion 24b. Interference between 56 and cylindrical plate portion 24b is avoided. Further, the expansion and contraction direction of the spring portion 55 is along the outer side surface of the cylindrical plate portion 24, so that the tensile load of the spring portion 55 is reduced. In addition, since the clip portion 50 has a shape of a paper clip in this embodiment, it contacts the inner surface of the cylindrical plate portion 24b so that the fixing of the right locking member 5 is stabilized.

In this way, the right locking member 5 has the clip portion 50 formed at one end portion thereof clipped to the right portion of the ventilation fan frame, and the hook portion 59 formed at the other end portion thereof to the cover main body of the ventilation fan cover 1 . 2, the right part of the ventilation fan cover 1 is fixed to the right part of the ventilation fan frame. In this state, the clip portion 50 and the hook portion 59 are pulled so as to be attracted to each other by the spring portion 55 interposed therebetween. The pulling force of the spring portion 55 fixes the right portion of the ventilation fan cover 1 and the right portion of the ventilation fan frame.

Similarly, the left locking member 4 is used to fix the left portion of the ventilation fan cover 1 to the left portion of the ventilation fan frame.

FIG. 9 is an enlarged side view showing a state in the middle of covering the ventilation fan cover with the fastener attached to the ventilation fan frame removed from the large ventilation fan, and FIG. FIG. 11 is a plan partial cross-sectional view showing a state in the middle of putting the ventilation fan cover on the ventilation fan frame, and FIG. 12 is an enlarged view of the B portion shown in FIG. 11, FIG. 13 is a plan partial sectional view of the ventilating fan cover in the state shown in FIG. 11, and FIG. 14 is a C shown in FIG. FIG. 15 is an enlarged cross-sectional view of a portion, and FIG. 15 is an enlarged front view showing a portion of the ventilation fan cover where the locking tool is locked.

16 is an enlarged side view of the ventilating fan cover in a state of being locked to the ventilating fan frame of the small ventilating fan with a locking tool, and FIG. 17 is an enlarged view of the portion D shown in FIG. 18 is a plan partial cross-sectional view of the ventilating fan cover in the state shown in FIG. 16, and FIG. 19 is an enlarged cross-sectional view of the E portion shown in FIG.

Referring to these figures, the ventilation fan cover 1 is configured to be attachable to ventilation fan frames 11 and 13 of ventilation fans 10 and 12 of two sizes, respectively. The standard for the size of the ventilation fans 10 and 12 is usually the standard for the size of the blades of the propellers 10a and 12a.

The ventilating fan frame 11 of the ventilating fan 10 (hereinafter referred to as the "large ventilating fan 10") according to the larger standard shown in FIGS. It consists of a portion 11a and a tubular plate portion 11b having a square tube shape. A rectangular outer peripheral corner portion 11c is provided between the flat plate portion 11a and the cylindrical plate portion 11b. The end of the cylindrical plate portion 11b opposite to the flat plate portion 11a is an open end. Here, it is assumed that the flat plate portion 11a is formed in a flat plate shape at the front end of the tubular plate portion 11b and arranged in front of the propeller 10a of the ventilation fan 10. As shown in FIG.

Referring to FIG. 9, when attaching the ventilating fan cover 1 to the ventilating fan frame 11, first, the ventilating fan frame 11 is removed from the base frame 10b of the ventilating fan 10, and the left rear end portion of the cylindrical plate portion 11b of the ventilating fan frame 11 is attached to the left. The clip portion 40 (see FIG. 10) of the locking device 4 is clamped, and the clip portion 50 of the right locking device 5 is clamped to the right rear end portion of the tubular plate portion 11b.

Referring to FIG. 10, after that, the ventilation fan frame 11 is returned to the predetermined position of the ventilation fan 10, and the clip portions 40, 50 of the fasteners 4, 5 arranged inside the tubular plate portion 11b of the ventilation fan frame 11 are attached to the ventilation fan. 10 and the tubular plate portion 11b of the ventilating fan frame 11. As shown in FIG.

In a state in which the fasteners 4 and 5 are provided on the ventilation fan 10 in this manner, the outer periphery cover portion 24 is aligned with the outer periphery corner portion 11c of the ventilation fan frame 11 by aligning the outer periphery corner portion 24c of the outer periphery cover portion 24 of the ventilation fan cover 1 with the outer periphery corner portion 11c of the ventilation fan frame 11. The state of contact with the ventilation fan frame 11 is secured. The contact state is a state in which the flat plate portion 24a of the outer peripheral cover portion 24 and the flat plate portion 11a of the ventilation fan frame 11 are in close contact or proximity, or a tubular plate portion 24b of the outer peripheral cover portion 24 and a tubular plate portion of the ventilation fan frame 11. 11b are in close proximity or proximity, or both. It should be noted that they do not necessarily have to be in contact with each other in the entire circumferential direction of the ventilation fan frame 11, and the outer peripheral cover portion 24 and the ventilation fan frame 11 may be in contact with each other in a part of the entire circumferential direction. Further, as described above, the cover body 2 of the ventilation fan cover 1 is made of synthetic resin or the like, so that the front and back surfaces of the cover body 2 are smooth surfaces without unevenness, so that the outer peripheral cover portion 24 and the ventilation fan frame 11 can be separated from each other. can ensure the contact state.

If there is a gap between the ventilation fan cover 1 and the ventilation fan frame 11, oil-containing air is directly sucked into the propeller 10a of the ventilation fan 10 from this gap without passing through the filter 3 of the intake ports 22, 22a, and the ventilation fan cover is attached. Even if it is, the ventilation fan will be dirty. Therefore, by reducing the gap between the ventilation fan cover 1 and the ventilation fan frame 11 as described above, it is possible to suppress oil contamination from the gap of the ventilation fan cover.

In addition, even when the air passes through the intake ports 22 and 22a, the oil contained in the air may not be completely removed by the filter 3. In this case, the air contacts the back side of the ventilation fan cover, causing the oil to spread to the back side. The oil content in the air that adheres and passes through the propeller 10a may be reduced. In the ventilation fan cover 1, as described above, the inner peripheral cover portion 23 and the outer peripheral cover portion 24 are stepped so that the inner peripheral cover portion 23 protrudes forward from the outer peripheral cover portion 24 when viewed from the front. By being connected, when the outer peripheral cover part 24 is put on the ventilation fan frame 11, the surface area of the back surface of the ventilation fan cover 1 that contacts the intake air between the air intake ports 22, 22a and the propeller 10a is not stepped. will increase in comparison. As a result, while the oil-containing air passes through the intake ports 22, 22a and reaches the propeller 10a of the ventilation fan 10, the amount of oil adhering to the air mixed with the intake air can be increased. Further, since the air intake ports 22, 22a are far away from the propeller 10a in this way, the suction pressure to the propeller 10a, which leads to dirt on the filter 3, does not concentrate on the central portions of the air intake ports 22, 22a. Oil stains can be evenly removed over the entire wide range of 22a.

From this state, hold the hook portion 49 of the left locking member 4 by hand, move it to the left locking portion 25 of the ventilation fan cover 1, and insert it inside the ventilation fan cover 1 through the locking hole 25a. Likewise, holding the hook portion 59 of the right locking member 5, move it to the right locking portion 26 of the ventilation fan cover 1 and insert it into the ventilation fan cover 1 through the locking hole 26a. As a result, locking of the ventilation fan cover 1 to the ventilation fan frame 11 via the left and right locking tools 4 and 5, that is, attachment of the ventilation fan cover 1 to the ventilation fan 10 is completed.

A mode of operation of each part of the locking tools 4, 5 when locking the hook parts of the locking tools 4, 5 to the locking parts 25, 26 of the ventilation fan cover 1 will be described. Here, only the right locking device 5 will be described as a representative of the two locking devices 4 and 5 .

The locking member 5 with the clip portion 50 sandwiched between the ventilation fan frame 11 is held by hand, and the hook portion 59 is inserted into the locking hole 26a of the locking portion 26 using the action of the locking member 5, which will be described later. to lock.

Here, since the tubular plate portion 11b of the ventilation fan frame 11 of the large ventilation fan 10 is close to or in close contact with the tubular plate portion 24b of the outer peripheral cover portion 24 of the ventilation fan cover 1, the tubular plate portion 11b is sandwiched in the horizontal direction. The clip portion 50 of the locking tool 5 and the locking hole 26a into which the hook portion 59 is inserted are close to each other. However, partly because the outer peripheral cover portion 24 is formed one step behind the inner peripheral cover portion 23, the rear end portion of the cylindrical plate portion 11b of the ventilation fan frame 11 is located at the rear end of the outer peripheral cover portion 24 (that is, the ventilation fan The rear end of the cover 1 protrudes rearward. That is, there is a considerable distance in the front-rear direction between the end portion 51 of the clip portion 50 and the locking hole 26a.

In this state, as the hook portion 59 is pulled forward to move to the locking hole 26a, the spring portion 55 is pulled forward and elongated on the outer side of the cylindrical plate portion 24b. As a result, the second bent portion 57 reaches a position corresponding to the outer peripheral corner portion 24c, and from this state, the fifth straight portion 58 is arranged along the flat plate portion 24a, and the hook portion 59 is inserted into the locking hole 26a. can be delivered to

Further, at this time, the distance and relative direction between the spring portion 55 and the second bent portion 57 are adjusted by the elastic deformation of the circular curved portion 56 as described above, and the second bent portion 57 is moved to the outer peripheral corner portion 24c. can be placed in the optimum position for

In this way, by inserting the hook portion 59 inside the ventilation fan cover 1 through the locking hole 26 a of the right locking portion 26 , the right portion of the ventilation fan cover 1 is attached to the right portion of the ventilation fan frame 11 by the right locking member 5 . The locking work is completed.

On the other hand, with the clip portion 49 of the left locking member 4 as well, when the left rear end portion of the cylindrical plate portion 11b of the ventilation fan frame 11 is held between the clip portions 49 and the hook portion 49 is pulled forward, the spring portion 45 is released. Stretched. By inserting the hook portion 49 thus moved into the inside of the ventilation fan cover 1 through the locking hole 25 a of the left locking portion 25 , the left portion of the ventilation fan cover 1 is secured to the ventilation fan frame 11 by the left locking tool 4 . The work to lock the left part is completed.

In this way, when the work of locking the ventilation fan cover 1 to the ventilation fan frame 11 by the left and right locking tools 4 and 5 is completed, the attachment of the ventilation fan cover 1 to the large ventilation fan 10 is completed.

When the ventilating fan cover 1 is removed from the ventilating fan frame 11, the clip portion 50 of the right locking member 5 clamps the cylindrical plate portion 11b of the ventilating fan frame 11 while the fifth straight portion 58 and the second bent portion are bent. By holding the portion 57, the fourth linear portion 56b, or the like and pulling the fifth linear portion 58 forward, the hook portion 59 can be easily extracted forward and outward from the locking hole 26a. The hook portion of the left locking member 4 is similarly pulled out from the locking hole 25a. In this way, by removing the locking tools 4 and 5 from the ventilation fan cover 1, the locking of the ventilation fan cover 1 to the ventilation fan frame 11 is released, and the ventilation fan cover 1 is pulled forward to be easily removed from the ventilation fan cover 1. - 特許庁be able to.

After the ventilating fan cover 1 is removed, the latches 4 and 5 remain in a state in which the respective clip portions 40 and 50 are sandwiched between the ventilating fan frame 11 and are still provided on the ventilating fan 10 . Therefore, these can also be used to lock the new ventilation fan cover 1 to the ventilation fan frame 11 after replacement.

The ventilating fan frame 13 of the ventilating fan 12 according to the smaller standard shown in FIGS. 13a and a tubular plate portion 13b having a square tubular shape. A rectangular outer peripheral corner portion 13c is formed between the flat plate portion 13a and the tubular plate portion 13b. The end of the cylindrical plate portion 13b opposite to the flat plate portion 13a is an open end. Here, it is assumed that the flat plate portion 13a is formed in a flat plate shape at the front end of the tubular plate portion 13b and arranged in front of the propeller 12a of the small ventilation fan 12. As shown in FIG.

When attaching the ventilation fan cover 1 to the small ventilation fan 12, first, as in the case of the large ventilation fan 10, the clip portions 40 and 50 of the left and right locking members 4 and 5 are sandwiched between the left and right rear ends of the ventilation fan frame 13, In addition, the small ventilating fan 12 is provided with the right and left locking tools 4 and 5 in a state in which both the clip parts 40 and 50 are held between the ventilating fan frame 13 and the base frame 12b of the ventilating fan 12.例文帳に追加

From this state, the ventilating fan cover 1 is put on the ventilating fan frame 13. In this case, the outer peripheral corner portion 23c of the inner peripheral cover portion 23 and the outer peripheral corner portion 13c of the ventilating fan frame 13 are brought together to form the inner peripheral cover portion. 23 and the ventilation fan frame 13 are brought into contact with each other.

Here, the state in which the inner peripheral cover portion 23 and the ventilation fan frame 13 are in contact means a state in which the flat plate portion 23a and the flat plate portion 13a are in close contact or close to each other, or a state in which the tubular plate portion 23b and the tubular plate portion 13b are in close contact or close proximity. It may be in a state where it is closed or in both of these states, and it may be in a state in which it does not necessarily extend over the entire circumference of the inner peripheral cover portion 23 but is in contact with the ventilating fan frame 13 partially. Since the inner peripheral cover portion 23 and the ventilation fan frame 13 are in contact with each other in this way, the air containing oil can flow from the gap between the inner peripheral cover portion 23 and the ventilation fan frame 13 to the propeller 12a of the ventilation fan 12 without passing through the filter 3. The fact that oil stains on the ventilation fan 12 due to the inhalation of the oil is suppressed, and that the smooth surface of the inner peripheral cover portion 23 makes it easy to secure the contact state will be described with respect to the outer peripheral cover portion 24. As I did.

In this way, not only when covering the ventilation fan frame 11 of the large ventilation fan 10 with the ventilation fan cover 1, but also when covering the ventilation fan frame 13 of the small ventilation fan 12 with the ventilation fan cover 1, the gap between the ventilation fan cover 1 and the ventilation fan frame is eliminated. is reduced, in either case, the effect of removing oil from the intake air by the filter 3 can be sufficiently obtained by putting the ventilation fan cover 1 on.

With the ventilation fan cover 1 placed on the ventilation fan frame 13 in this manner, the hook portion 59 of the right locking member 5 is pulled forward and inserted into the locking hole 26a. The hook portion 49 (see FIG. 10) of the left locking tool 4 is similarly inserted into the locking hole 25a.

Here, the tubular plate portion 13b of the ventilation fan frame 13 covered with the inner peripheral cover portion 23 is considerably farther from the tubular plate portion 24b of the outer peripheral cover portion 24 arranged on the outer peripheral side than the inner peripheral cover portion 23. Keep your distance. Regarding the right latch 5, the spring portion 55 is stretched forward right from the clip portion 50 that clamps the right portion of the tubular plate portion 13b of the ventilation fan frame 13, and the spring portion 55 is temporarily attached to the tubular portion of the outer peripheral cover portion 24. After being placed on the right outer side of the right portion of the plate portion 24b, the hook portion 59 is moved leftward across the outer peripheral corner portion 24c and pulled to the locking hole 26a of the right locking portion 26 on the flat plate portion 24a. need to come

That is, when the outer peripheral cover portion 24 is aligned with the ventilation fan frame 11 as described above, the spring portion 55 is stretched in the longitudinal direction along the cylindrical plate portion 24b of the outer peripheral cover portion 24. and the tubular plate portion 24b. However, when the inner peripheral cover portion 23 is placed along the ventilation fan frame 13, the pulling direction of the spring portion 55 is in a direction intersecting the tubular plate portion 24b of the outer peripheral cover portion 24, and the spring portion 55 and the tubular plate portion 24b are pulled. may interfere with

Here, by forming the above-described first bent portion 53, the interference between the cylindrical plate portion 24b and the flange portion 24d of the outer peripheral cover portion 24 and the spring portion 55 of the right locking member 5 is alleviated. The spring portion 55 can be pulled without any force. By pulling the spring portion 55 in this manner, the second bent portion 57 is arranged at a position corresponding to the outer peripheral corner portion 24c, and the hook portion 59 can be inserted into the locking hole 26a.

As described above, the ventilating fan cover 1 is at least an inner peripheral cover having an outer peripheral corner portion 23c corresponding to the outer peripheral corner portion 13c of the ventilating fan frame 13 so that it can be placed over the ventilating fan frame 13 having a predetermined standard. and an outer peripheral corner portion 24c corresponding to the outer peripheral corner portion 11c of the ventilation fan frame 11 so that it can be placed over the ventilation fan frame 11 configured with a predetermined standard larger than the ventilation fan frame 13. The first cover portion 23 and the second cover portion 24 are connected in a stepped manner.

With this configuration, the ventilating fan cover 1 can be attached to both the ventilating fan frame 13 having a predetermined standard and the ventilating fan frame 11 having a predetermined standard larger than the ventilating fan frame 13 . The ventilation fan frames 11 and 13 are positioned by simply matching the outer peripheral corner portions 23c and 24c of the respective cover portions 23 and 24 with the outer peripheral corner portions 11c and 13c of the ventilation fan frames 11 and 13, respectively. A gap between the frames 11 and 13 and the ventilation fan cover 1 can be reduced. By forming the inner peripheral cover part 23 and the outer peripheral cover part 24 having such a function in a stepped manner, which does not require complicated processing, the standard ventilating fan 12 provided with the ventilating fan frame 13 can also be used. To achieve the object of the invention to provide a ventilating fan cover 1 which can be attached to a standard ventilating fan 10 having a ventilating fan frame 11 and which can suppress contamination of the ventilating fan no matter which one is attached to the cover at a low cost.

The ventilation fan cover 1 is provided with intake ports 22, 22a, and the inner peripheral cover portion 23 is formed so as to surround the intake ports 22, 22a when the intake ports 22, 22a are viewed directly from the outside. The outer peripheral cover portion 24 is formed to surround the inner peripheral cover portion 23 , and the inner peripheral cover portion 23 is formed to protrude forward from the outer peripheral cover portion 24 .

With this configuration, when the inner peripheral cover portion 23 is placed on the ventilation fan frame 13, the outer peripheral cover portion 24 covers the ventilation fan frame 13 and the inner peripheral cover when the intake ports 22 and 22a are viewed directly from the outside. Since it is arranged so as to surround the portion 23, the state in which the inner peripheral cover portion 23 covers the ventilation fan frame 13 without any gap is not hindered. On the other hand, when covering the ventilation fan frame 11 with the outer peripheral cover portion 24, the inner peripheral cover portion 23 is placed on the front side of the ventilation fan frame 11 and the outer peripheral cover portion 24 when the intake ports 22 and 22a are viewed directly from the outside. Therefore, the state in which the outer peripheral cover part 24 covers the ventilation fan frame 11 without any gap is not hindered. That is, the stepped inner peripheral cover portion 23 and outer peripheral cover portion 24 having the above-described functions are constructed by a method that does not require complicated processing, and the above-described effects of the ventilating fan cover 1 can be reliably obtained. . Also, even if the air passes through the air intake, the oil contained in the air may not be completely removed by the filter. Although the amount of oil in the air passing through may be reduced, in the present invention, the stepped shape prevents the first cover portion from stepping when the second cover portion is placed on the second ventilation fan frame. Projects from the second cover part, the surface area of the back surface of the ventilation fan cover that contacts the intake air between the intake port and the propeller increases compared to the case where the stepped shape is not used. It is possible to increase the adhesion amount of oil in the air mixed with the intake air while passing through the intake port and reaching the propeller of the ventilation fan. Furthermore, since the air intake is far away from the propeller in this way, oil stains are not concentrated in the central portion of the air intake, and oil stains can be evenly removed from the entire wide area of the air intake.

Further, the ventilating fan cover 1 has engaging portions 25 and 26 capable of engaging the engaging tools 4 and 5 engaged with the ventilating fan frame 11 or the ventilating fan frame 13 .

With this configuration, locking and removal of the locking members 4 and 5 to the locking portions 25 and 26 of the ventilation fan cover 1 can be easily performed.

In addition, the ventilation fan cover 1 has an inner peripheral cover portion 23 and an outer peripheral cover portion 24 formed of synthetic resin.

With this configuration, the surfaces of the inner peripheral cover portion 23 and the outer peripheral cover portion 24 made of synthetic resin can be made smooth without unevenness, and the ventilating fan frame 13 and the inner peripheral cover portion 23 placed thereon can be separated. Also, the ventilation fan frame 11 and the outer peripheral cover portion 24 placed thereon can be brought into contact with each other with a reduced gap. Therefore, it is possible to further reduce the problem that the oil-mixed air is directly sucked into the ventilation fans 10, 12 through the gap between the ventilation fan cover 1 and the ventilation fan frames 11, 13 without passing through the filter 3 of the intake ports 22, 22a. In both cases of covering the ventilation fan frame 11 and covering the ventilation fan frame 13, the effect of protecting the ventilation fans 10 and 12 from dirt by the ventilation fan cover 1 can be stabilized.

Further, the ventilation fan cover 1 is formed with outer peripheral ribs 27a to 27e (outer peripheral rib group 27) on the outer peripheral cover portion 24. As shown in FIG.

With this configuration, the outer peripheral cover portion 24 is reinforced by the outer peripheral rib group 27 . Further, in a state where the outer peripheral cover part 24 is put on the ventilation fan frame 11, more oil contained in the intake air can be adhered to the rear side surface of the cover body 2 as much as the surface area is increased by the outer peripheral rib group 27.例文帳に追加Further, an outer peripheral rib group 27 protrudes on the front side of the cover body 2, and the oil contained in the intake air to the ventilation fan 10 flows from the intake ports 22, 22a, for example, through the inner peripheral cover portion 23 and into the outer peripheral cover portion 24 around it. , such oil can be received by the convex outer peripheral rib group 27 . In this way, when the outer peripheral cover portion 24 is put on the ventilation fan frame 11, the outer peripheral ribs 27a to 27e (peripheral rib group 27) formed in the outer peripheral cover portion 24 are formed to introduce the air into the intake ports 22, 22a. A large amount of oil contained in the front air can be attached to the surface of the ventilation fan cover 1, the amount of oil attached to the ventilation fans 10 and 12 is reduced accordingly, and the ventilation fan cover 1 protects the ventilation fans 10 and 12 from dirt. The effect can be further enhanced. Since the outer peripheral ribs 27a to 27e (outer peripheral rib group 27) formed on the outer peripheral cover portion 24 are used as means having such an oil receiving function, the cost of the ventilating fan cover 1 can be further reduced.

Further, the ventilation fan cover 1 has the filter 3 attached so as to cover the intake ports 22 and 22a arranged so as to be surrounded by the inner peripheral cover portion 23 in a front view.

With this configuration, oil stains on the ventilation fans 10 and 12 due to oil-containing air passing through the filter 3 can be prevented regardless of whether the ventilation fan cover 1 is attached to the ventilation fan frame 11 or to the ventilation fan frame 13. A suppressing effect is obtained. Therefore, the effect of preventing the ventilation fans 10 and 12 from being soiled, which is originally required for the ventilation fan cover 1, can be provided to both the large ventilation fan 10 having the ventilation fan frame 11 and the small ventilation fan 12 having the ventilation fan frame 13.例文帳に追加

In addition, in order to lock the ventilation fan cover put on the ventilation fan frame to the ventilation fan frame, the locking member is not limited to one made of a single linear body such as a wire. It is also possible to use a double-sided tape, a hook-and-loop fastener, a magnet, or the like.

Further, the location of the ventilation fan cover to which the locking member is locked is not limited to the location corresponding to the locking portion shown in FIG. 1 and the like.

Furthermore, the above description assumes that the propeller shaft of the ventilating fan is arranged in the front-rear direction and the ventilating fan cover is attached to the front of the ventilating fan frame. It is also possible that the ventilation fan is installed on the ceiling, the propeller axis is vertical, and the ventilation fan cover is attached below the ventilation fan frame. In other words, the ventilating fan cover can correspond to any arrangement of the ventilating fan frame.

Furthermore, the material of the cover main body of the ventilating fan cover is not limited to the synthetic resin as described above, and may be, for example, an aluminum foil molding that has been commonly used as a ventilating fan cover.

Furthermore, although the ventilating fan cover 1 described above has a specific shape, it is not limited to this. For example, the ventilation fan cover 1 can be attached to ventilation fans 10 and 12 of two standards, that is, the two cover portions 23 and 24 are stepped so as to cover the ventilation fan frames 11 and 13 of each size. Although it is formed to be connected, it may be capable of being attached to ventilation fans of three or more standards. That is, a plurality of cover portions each having an outer peripheral corner portion corresponding to the outer peripheral corner portion of each ventilation fan frame are formed so as to cover the ventilation fan frame of each size, and the plurality of cover portions are connected to each other in a stepped manner. It is something to do. However, in the case of three or more cover portions, each cover portion may be connected in a stepped manner, or at least two cover portions may be connected in a stepped manner to form at least one step. By doing so, the effect of the present invention can be exhibited.

Further, although the ventilating fan cover 1 has ribs of a specific shape, they may be omitted or ribs of another shape may be formed. Also, the method of attaching the filter to the intake port is not limited to the configuration described above.

1 ventilator cover 2 cover body 3 filter 4 lock 5 lock 10 large ventilator 11 ventilator frame (second ventilator frame)
11a Flat plate portion 11b Cylindrical plate portion 11c Peripheral corner portion 12 Small ventilation fan 13 Ventilation fan frame (first ventilation fan frame)
13a Flat plate portion 13b Tubular plate portion 13c Outer peripheral corner portion 21 Window frame portion 21a Central rib 22 Intake port 22a Intake port 23 Inner peripheral cover portion (first cover portion)
23a Flat plate portion 23b Cylindrical plate portion 23c Peripheral corner portion 24 Peripheral cover portion (second cover portion)
24a Flat plate portion 24b Cylindrical plate portion 24c Outer peripheral corner portion 25 Engagement portion 25a Engagement hole 26 Engagement portion 26a Engagement hole 27 Outer peripheral rib group 27a Rib 27b Rib 27c Rib 27d Rib 27e Rib

Claims (6)

A ventilation fan cover,
at least,
a first cover portion having an outer peripheral corner portion corresponding to an outer peripheral corner portion of the first ventilation fan frame so as to be able to cover the first ventilation fan frame configured according to a predetermined standard;
a second cover portion having an outer peripheral corner portion corresponding to an outer peripheral corner portion of the second ventilating fan frame so as to be able to cover the second ventilating fan frame configured to a predetermined standard larger than the first ventilating fan frame; equipped with
A ventilation fan cover, wherein the first cover portion and the second cover portion are connected in a stepped manner. Equipped with an air intake,
When the air intake port is viewed from the outside, the first cover portion is formed to surround the air intake port, and the second cover portion is formed to surround the first cover portion. 2. The ventilation fan cover according to claim 1, wherein said first cover portion is formed to protrude forward from said second cover portion. 3. The ventilating fan cover according to claim 2, further comprising an engaging portion capable of engaging an engaging tool engaged with said first ventilating fan frame or said second ventilating fan frame. 4. The ventilation fan cover according to claim 1, wherein said first cover portion and said second cover portion are made of synthetic resin. 4. The ventilation fan cover according to any one of claims 1 to 3, wherein ribs are formed on the second cover portion. 3. The ventilation fan cover according to claim 2, wherein a filter is attached so as to cover said intake port.

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