JP2019219161A - Air fan cover engaging tool - Google Patents

Abstract

To provide an air fan cover engaging tool which enables a user to perform engaging work easily even if an engaging position for an air fan frame and an engaging position for an air fan cover are spaced apart from each other and a direction therebetween is incorrect.SOLUTION: An engaging tool 5 includes: a clip part 50 which is formed by one bent linear object and can sandwich an air fan frame; a hook part 59 which can engage with an air fan cover; and a coil shaped extension spring part 55 located between the clip part 50 and the hook part 59. Further, the engaging tool 5 includes a first bent part 53 located between the clip part 50 and the spring part 55 and a second bent part 57 located between the hook part 59 and the spring part 55.SELECTED DRAWING: Figure 8

Description

  The present invention relates to a ventilation fan cover locking device, and more particularly to a locking device used to lock a ventilation fan cover over a ventilation fan frame to the ventilation fan frame.

  FIGS. 20A and 20B are diagrams showing a conventional structure for attaching a ventilation fan cover to a ventilation fan frame. FIG. 20A is a perspective view showing a state in the middle of attachment, and FIG. FIG.

  Referring to the figure, for example, a ventilation fan 8 is provided on a wall facing a room in a house. The ventilation fan 8 includes a base frame 80 attached to a wall, a propeller 81, and a ventilation fan frame 82 that covers the propeller 81. The ventilation fan frame 82 is provided so as to protrude from a wall to which the base frame 80 is attached. Assuming that the projecting direction is forward, a flat plate portion 82a having a square shape (usually a square shape) as viewed from the front is formed at the front end of the ventilation fan frame 82. An inlet 83 having a circular shape in a front view 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 ventilation fan frame 82 is formed with a rectangular cylindrical plate portion 82b extending rearward from upper, lower, left and right edges of the flat plate portion 82a. A space between the flat plate portion 82a and the cylindrical plate portion 82b is a square outer peripheral corner portion (bent portion) 82c.

  The ventilation fan cover 7 includes a cover body 71 and a filter 70 made of a 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 72, and a pair of upper and lower intake ports 72 a and 72 b formed in the window frame 72 is covered with the filter 70 from the inside. Locking portions 77 having locking holes 77a are formed at appropriate locations on the flat plate portion 73 of the cover main body 71 on both left and right sides of the window frame portion 72.

  The cover main body 71 is formed with an inverted U-shaped side plate portion 74 as viewed from the front, which extends rearward from the right end, the left end, and the upper end of the flat plate portion 73 which is a quadrilateral side in a front view. An outer peripheral corner 75 is formed between the flat plate 73 and the side plate 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 a state in which the ventilation fan cover 7 is put on the ventilation fan frame 82.

  Further, a flap 76 for covering the lower end portion of the ventilation fan frame 82 is formed in the cover body 71 so as to extend below the flat plate portion 73. The boundary between the flat plate portion 73 and the flap 76 is a broken line 76a, and the angle of the flap 76 with respect to the ventilation fan frame 82 can be adjusted by adjusting the bending angle at the broken line 76a.

  The ventilation fan cover locking device 9 (hereinafter simply referred to as “locking device 9”) includes a clip 91, a spring 92, and a hook 93. The clip 91 is formed by bending a steel plate material into a U-shape. The spring 92 is a coil-shaped tension spring. Both ends of the spring 92 have a ring shape, and a ring portion 93 a is also formed at one end of the hook 93. The loop portion at one end of the spring 92 is hooked on a locking claw portion 91a formed on the clip 91, and the loop portion at the other end of the spring 92 is hooked on the loop portion 93a of the hook 93, so that the clip 91, Three members including a spring 92 and a hook 93 are connected.

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

  From this state, referring to FIG. 20A, 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 tool 9 attached to the ventilation fan frame 82 is pulled forward, and the hook 93 is inserted into the locking hole 77 a of the locking portion 77. Similarly, the hooks of the locking tools (not shown) on the right and left opposite sides of the locking tools 9 are inserted into the locking holes of the ventilation fan cover 7. 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 tool 9 and a locking tool (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 in the ventilation fan cover 7, and the hooks 93 of the locking tool 9 are provided in the left and right locking portions including the locking portion 77. These locking portions 78 and 79 are used in cases where it is difficult to hook up.

  A ventilation fan cover locking device having the same structure as the locking device 9 as described above is disclosed in, for example, Patent Document 1.

JP 2000-254427 A

  There are a plurality of standards for the size of the ventilation fan, and a ventilation fan frame having a different size is used depending on the difference in the standard. Here, the fact that the same locking device can be used for the ventilation fans of different sizes using the same ventilation fan cover allows the manufacturer of the ventilation fan cover to use a common product, which leads to cost reduction, and also for general consumers. Such products are already on the market because they can be purchased without concern for size differences. However, when providing a ventilation fan cover corresponding to a ventilation fan of a different size, the size of the ventilation fan cover needs to be a ventilation fan cover of a size corresponding to the largest ventilation fan among applicable ventilation fans. However, in this case, the clipping portion of the ventilation fan frame at one end portion of the locking device and the locking device are different depending on whether the device is mounted on a ventilation fan frame of a certain size or a ventilation fan frame of a different size. There is a problem that the positional relationship between the other end portion and the portion locked to the ventilation fan cover is greatly different.

  Further, as described above, the conventional locking tool 9 is formed by combining three separate members such as the clip 91, the spring 92, and the hook 93, and the number of components is increased. Costly.

  The present invention has been made in order to solve the above-described problems, and relates to a relationship (distance or distance) between an attachment position of a locking tool to a ventilation fan frame and an attachment position to a ventilation fan cover. In order to make it possible to lock the ventilation fan cover to the ventilation fan frame with the same locking device without increasing the loading / unloading of the locking device or causing defects such as deformation of the ventilation fan cover even if the direction changes An object of the present invention is to provide a structured ventilation fan cover locking device at low cost.

  In order to achieve the above object, the invention according to claim 1 is a ventilation fan cover locking device for locking a ventilation fan cover to a ventilation fan frame, comprising one bent linear body, A clip portion formed at one end portion of the linear body and capable of holding the ventilation fan frame, a hook portion formed at the other end portion of the linear body and engageable with the ventilation fan cover, a clip portion and a hook portion; A coil-shaped extension spring portion formed between the clip portion and the extension spring portion, a first bent portion formed by bending a linear body, a hook portion and an extension spring portion, And a second bent portion formed by bending a linear body.

  With this configuration, for example, in the case where a ventilation fan cover of one specification is put on each ventilation fan frame having a different size, while holding the ventilation fan frame with the clip portion and locking the hook portion to the ventilation fan cover, the ventilation fan The angle at the first bent portion changes within the range of the characteristics of the material constituting the locking device, and the second bent portion corresponds to the outer peripheral corner of the ventilation fan cover corresponding to the edge of the outer portion of the cover. The state where the ventilation fan cover is placed on the large or small ventilation fan frame is secured at the position corresponding to the part and disposed outside the outer portion of the ventilation fan cover. Various functional parts are formed by bending one linear body.

  According to a second aspect of the present invention, in the configuration according to the first aspect of the present invention, the second spring is formed by being wound between the extension spring portion and the second bent portion in a direction substantially orthogonal to the winding direction of the extension spring portion. It further comprises a circular curved portion.

  With such a configuration, even when a change in the distance or the relative direction occurs between the hook portion and the tension spring portion, the change in the distance and the relative direction is dealt with by the elastic deformation in the circular curved portion, and the angle in the second bent portion is not allowed. Does not need to be changed. Further, since the circular curved portion is disposed between the second bent portion and the extension spring portion, the circular curved portion is arranged outside the outer portion of the ventilation fan cover together with the extension spring portion.

  According to a third aspect of the present invention, in the configuration of the first or second aspect, when viewed in the axial direction of the extension spring portion, a first end of the extension spring portion connected to the first bent portion; The second end portion of the tension spring portion connected to the second bent portion is disposed at substantially the same position in the circumferential direction of the tension spring portion, and the clip portion and the hook portion are connected to the first end portion and the second end portion. Are disposed on the opposite side to the tension spring portion.

  With this configuration, the clip portion is arranged to sandwich the ventilation fan frame, and the hook portion is pulled outward from the ventilation fan cover over the ventilation fan frame even in a state where the hook portion is arranged to be locked to the ventilation fan cover. A spring part can be arranged, and a state without unreasonable interference between the expansion and contraction operation of the tension spring part and the ventilation fan cover can be secured.

  The invention according to claim 4 is a ventilation fan cover locking device for locking the ventilation fan cover to the ventilation fan frame, comprising one bent linear body, formed at one end of the linear body. A clip portion capable of holding the ventilation fan frame, a hook portion formed at the other end of the linear body and capable of being locked to the ventilation fan cover, and a coil-shaped portion formed between the clip portion and the hook portion. A tension spring portion, a connection portion connecting between the clip portion and the tension spring portion, and a bent portion formed between the hook portion and the tension spring portion and formed by bending a linear body. Things.

  With this configuration, the mounting structure is such that the ventilation fan frame is sandwiched by the clip portion and the ventilation fan cover is fixed by the bent portion and the hook portion.

  As described above, the invention according to claim 1 is, for example, in the case where a ventilation fan cover of one specification is put on each ventilation fan frame having a different size, the clip portion holds the ventilation fan frame while the hook portion covers the ventilation fan cover. The angle at the first bent portion is changed within the range of the characteristic of the material constituting the locking device, and the angle is changed at the second fold corresponding to the edge of the outer portion of the ventilation fan cover. The bent portion is arranged at a position corresponding to the outer peripheral corner portion of the ventilation fan cover, and the state of being disposed outside the outer portion of the ventilation fan cover is ensured even when the ventilation fan cover is put on a large or small ventilation fan frame. That is, there is no problem such as the ventilation fan cover being deformed by being caught by the pulled tension spring portion. Therefore, cost reduction can be achieved. Furthermore, since the ventilation fan cover locking device of the present invention is formed of one linear body, the cost can be further reduced.

  According to the second aspect of the present invention, in addition to the effect of the first aspect, even when the distance or the relative direction changes between the hook portion and the tension spring portion, the elastic deformation at the circular curved portion is achieved. Therefore, it is not necessary to forcibly change the angle at the second bent portion. Therefore, the cost reduction effect of the ventilation fan cover locking device of the present invention can be made more reliable. Further, since the circular curved portion is disposed between the second bent portion and the extension spring portion, the circular curved portion is arranged outside the outer portion of the ventilation fan cover together with the extension spring portion. Therefore, interference between the ventilation fan cover and the circular curved portion is avoided.

  According to a third aspect of the present invention, in addition to the effects of the first or second aspect, the clip portion is arranged to sandwich the ventilation fan frame, and the hook portion is arranged to be locked to the ventilation fan cover. Even in this state, the tension spring portion can be arranged outside the ventilation fan cover over the ventilation fan frame, and a state in which the extension and contraction operation of the tension spring portion and the ventilation fan cover do not cause excessive interference can be ensured. Therefore, the operation of attaching and detaching the locking member to and from the ventilation fan cover is facilitated, and problems such as breakage of the ventilation fan cover by the locking member are also avoided.

  According to the fourth aspect of the present invention, since the ventilation fan frame is sandwiched by the clip portion and the ventilation fan cover is fixed by the bent portion and the hook portion, the mounting state of the ventilation fan cover and the ventilation fan frame having various dimensions and shapes is provided. Becomes stable.

BRIEF DESCRIPTION OF THE DRAWINGS It is a front view of the ventilation fan cover locking device (henceforth a "locking device") by the 1st Embodiment of this invention, and the ventilation fan cover to which the locking device is applied. FIG. 2 is an enlarged view of a portion A shown in FIG. 1. It is a rear view of the ventilation fan cover shown in FIG. It is an enlarged side view of the ventilation fan cover shown in FIG. FIG. 2 is an enlarged plan partial sectional view of the ventilation fan cover shown in FIG. 1. It is an enlarged bottom view of the ventilation fan cover shown in FIG. It is a side view of the locking tool shown in FIG. It is a top view of a locking tool. It is an expanded side view which shows the state in which the locking tool is attached to the ventilation fan frame removed from the large ventilation fan, and the ventilation fan cover is being covered. It is a plane partial sectional view showing a state in the middle of putting a ventilation fan cover on a ventilation fan frame attached to a large-sized ventilation fan in a state where an attachment is attached. It is an enlarged side view of the ventilation fan cover in the state where it was locked to the ventilation fan frame of the large-sized ventilation fan with the locking tool. It is an enlarged view of the B section shown in FIG. FIG. 12 is a partial plan sectional view of the ventilation fan cover in the state shown in FIG. 11. FIG. 14 is an enlarged sectional view of a portion C shown in FIG. 13. It is an enlarged front view which shows the part which locked the locking tool in the ventilation fan cover. It is an enlarged side view of the ventilation fan cover in the state where it was locked to the ventilation fan frame of the small ventilation fan with the locking device. FIG. 17 is an enlarged view of a portion D shown in FIG. 16. FIG. 17 is a partial plan sectional view of the ventilation fan cover in the state shown in FIG. 16. FIG. 19 is an enlarged sectional view of a portion E shown in FIG. 18. It is a figure which shows the attachment structure to the ventilation fan frame of the conventional ventilation fan cover, (a) is a perspective view which shows the state in the middle of attachment, (b) is a perspective view which shows the state which completed the locking by the locking tool. is there. FIG. 10 is a plan view of a ventilation fan cover locking device according to a second embodiment of the present invention, and corresponds to FIG. 8.

  FIG. 1 is a front view of a ventilation fan cover locking device (hereinafter simply referred to as a “locking device”) according to a first embodiment of the present invention and a ventilation fan cover to which the locking device is applied, and FIG. FIG. 3 is an enlarged view of a portion A shown in FIG. 1, FIG. 3 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. 6 is an enlarged plan partial cross-sectional view of the ventilation fan cover shown in FIG. 1, and FIG. 6 is an enlarged bottom view of the ventilation fan cover shown in FIG.

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

  Referring to these drawings, a 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.

  The cover body 2 is formed, for example, by vacuum forming a sheet made of polyvinyl chloride having a thickness of about 1 mm. Further, for example, it has flexibility (flexibility) that can be deformed along the locking tools 4 and 5 when pressed by the locking tools 4 and 5. Furthermore, the front and back surfaces have a smooth surface without irregularities and wrinkles, and when mounted on a ventilation fan frame, a gap between the fan frame and the ventilation fan frame is reduced, and a state of contact with the ventilation fan frame can be ensured.

  The cover main body 2 is formed with a substantially rectangular window frame portion 21 in a front view. In the upper and lower central portions of the window frame portion 21, a front protruding central rib 21a extending in the left-right direction is formed. The central rib 21a is the foremost end of the ventilation fan cover 1, and the window frame portion 21 projects forward in a pentagonal shape with the central rib 21a as a top end in a side view.

  The cover main body 2 of the ventilation fan cover 1 is a molded product made of a synthetic resin as described above. By forming such a central rib 21a, the strength is secured.

  As described above, in the window frame portion 21, the upper intake port 22 is opened at the upper inclined surface portion which is inclined rearward and upward from the center rib 21a to the upper end of the window frame portion 21. A lower intake port 22a is provided on a lower inclined surface that is inclined rearward and downward to a lower end of the lower intake port.

  As shown in FIG. 3, the filter 3 is attached to the back surface of the window frame portion 21, and the filter 3 covers both the intake ports 22 and 22 a. With this configuration, the air containing oil generated at the time of cooking passes through the intake ports 22 and 22a, so that the oil is removed by the filter 3 and then passes through the ventilation fan. The filter 3 is made of a material suitable for removing such oil in the air, and is made of, for example, a nonwoven fabric.

  The inner peripheral cover portion 23 is formed so as to surround the window frame portion 21 in a front view (that is, a state in which the air 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 cylindrical tube 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 in a front view.

  A portion 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 cylindrical plate portion 23b is a rectangular outer peripheral corner portion 23c. The outer peripheral corner 23c is formed corresponding to an outer peripheral corner 13c of the ventilation fan frame 13 of the small ventilation fan 12 described later.

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

  A portion between the flat plate portion 24a and the cylindrical 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 cylindrical plate portion 24b is a square outer peripheral corner portion 24c. The outer peripheral corner portion 24c is formed corresponding to the outer peripheral corner portion 11c of the ventilation fan frame 11 of the large ventilation fan 10 described later.

  On the other hand, a flange-like flange portion 24d is formed at the rear end of the tubular plate portion 24b. In the present embodiment, a step in the outer peripheral direction is formed in the front and rear part of the cylindrical plate part 24b, and the rear part of the cylindrical plate part 24b from the step to the flange part 24d is a cylindrical plate part forward of the cylindrical plate part 24b. 24b is bulged more than the front part. However, the shape of the tubular plate portion 24b is not limited in this way. For example, there is no need to have a step in the middle of the front and rear, and a flange-like flange portion 24d is formed at the rear end of the tubular plate portion 24b. It is not necessary.

  The flat plate portion 24a extends up, down, left, and right from the rear end of the cylindrical plate portion 23b, which is the outer peripheral edge of the inner peripheral cover portion 23, and is formed in a substantially rectangular shape when viewed from the front. The flange portion 24d is a rear end portion of the cylindrical plate portion 24b, and is a rear end of the main body cover 2 and an 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. The tubular plate portion 23b of the inner peripheral cover portion 23 protrudes forward (toward the front side when the intake ports 22, 22a are directly viewed from the outside) from the inner peripheral end of the flat plate portion 24a of the outer peripheral cover portion 24. A flat plate portion 23 a is formed at a 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 step shape, 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.

  A pair of left and right locking portions 25 and 26 for locking a pair of left and right ventilation fan cover locking members (hereinafter, simply referred to as “locking members”) 4 and 5 are formed on the flat plate portion 24 a of the outer peripheral cover portion 24. ing.

  The left locking portion 25 has an oval shape that is long in the left-right direction when viewed from the front and has a trapezoidal shape in plan view. (At substantially the same position as the center rib 21a in the direction). A locking hole 25 a for inserting the hook portion 49 (see FIG. 10) of the left locking member 4 is provided in a flat plate portion at the front end of the left locking portion 25.

  The right locking portion 26 is formed to protrude forward at a substantially vertical center position of the flat plate portion 24a (a position substantially the same as the central rib 21a in the vertical direction) on the right side of the inner peripheral cover portion 23. Thus, it has the same configuration as the left locking portion 25, and has a locking hole 26a for inserting the hook portion 59 (see FIG. 10 and the like) of the right locking device 5.

  Further, a front protruding outer peripheral rib group 27 is formed on the flat plate portion 24a of the outer peripheral cover portion 24. The outer circumferential rib group 27 includes outer circumferential ribs 27a and 27b formed above the locking portions 25 and 26, and outer circumferential ribs 27c, 27d and 27e formed below the locking portions 25 and 26.

  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 in a front view, and extend to the upper half of the flat plate portion 24a having a substantially square shape in a front view 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 ends thereof are bent at the left and right sides of the inner peripheral cover portion 23. It extends downward, and is arranged such that each lower end portion is close to the upper ends of the left locking portion 25 and the right locking portion 26.

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

  The outer peripheral rib 27c of the flat plate portion 24a is disposed below the inner peripheral cover portion 23 and lower than the outer peripheral rib 27d of the flat plate portion 24a, and extends straight and horizontally in the front view below the outer peripheral rib 27c. Peripheral ribs 27e are disposed.

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

  The strength of the cover body 2 is enhanced by the outer peripheral rib group 27.

  The locking members 4 and 5 shown in FIG. 1 are each formed by bending a single linear body using, for example, a wire. The locking tools 4 and 5 have the same configuration, and the locking tool 5 will be described as a representative.

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

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

  The clip portion 50 is formed by bending a linear body into a semi-clip shape, and most of the clip portion 50 is disposed inside the ventilation fan frame with the outer extension portion 50a disposed outside the ventilation fan frame. By doing so, the ventilation fan frame is sandwiched.

  A first bent portion 53 formed by bending a linear body is formed between the outer extension 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 to the clip portion 50 side is connected to the end portion 51 of the clip portion 50, and from the outer extension portion 50 a of the clip portion 50 to the first straight portion 52. The end 51 is bent. 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 extends from the second straight portion 54 to the spring portion 55a. 55, and is bent at the first end 55a.

  On the other hand, a second bent portion 57 formed by bending a linear body is formed between the spring portion 55 and the hook portion 59. A fifth straight 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 straight portion 58. When the hook portion 59 is disposed inside the ventilation fan cover 1 via the locking hole 26a, the hook portion 59 is prevented from falling off due to its folded shape. The fifth linear portion 58 extending from the locking hole 26a is rotatable with the hook portion 59 serving as a rotation fulcrum, whereby the fifth linear portion 58 can be rotated in the front-rear direction from the locking hole 26a of the fifth linear portion 58. Is adjustable. Further, when the locking tool 5 is moved to the locking hole 26a and inserted, it becomes a knob which is picked by a human finger.

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

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

  A state where the third straight portion 56a extends from the circular curved portion 56 to the second end (front end) 55b of the spring portion 55, and is bent at the second end portion 55b from the third straight portion 56a to the spring portion 55. Has become.

  On the other hand, the fourth straight portion 56b extends from the circular curved portion 56 to the second bent portion 57. The front end portion of the third straight portion 56a and the rear end portion of the fourth straight portion 56b are arranged so as to be overlapped via the circular curved portion 56.

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

  Here, when viewed in the axial direction of the spring portion 55 with reference to FIG. 10 described later in addition to FIGS. 7 and 8, the circumferential direction of the spring portion 55 of each of the first end portion 55 a and the second end portion 55 b Are almost the same. Therefore, when the first end 55a and the second end 55b are made to extend along the outer surface of the cylindrical plate 24b of the outer peripheral cover 24 of the ventilation fan cover 1, the spring 55 extends outward from the cylindrical plate 24b. As described above, they are arranged without interfering with the cylindrical plate portion 24b.

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

  On the other hand, when viewed in the axial direction of the spring portion 55, the circular curved portion 56 overlaps the spring portion 56. That is, when viewed in the axial direction of the spring portion 55, the circular curved portion 56 is disposed on the same side (or a side close to) the spring portion 56 via the first end 55a and the second end 55b. Therefore, if the third straight portion 56a and the fourth straight portion 56b are along the outer surface of the tubular plate portion 24b, the circular curved portion 56 is also arranged so as to extend outward from the tubular plate portion 24b together with the spring portion 55. Does not interfere with the cylindrical plate portion 24b.

  On the other hand, the clip portion 50 and the hook portion 59 are on the opposite side (or away from the spring portion 55) via the first end portion 55a and the second end portion 55b in the axial direction of the spring portion 55. Be placed. Since the clip portion 50 holds the ventilation fan frame, and the hook portion 59 is locked by the locking portion 26 formed on the flat plate portion 24a of the outer peripheral cover portion 24 of the ventilation fan cover 1, it can be seen in the axial direction of the spring portion 55. For example, the spring portion 55 is disposed inside the cylindrical plate portion 24b along the first end 55a and the second end 55b.

  That is, in locking the ventilation fan cover 1 to the ventilation fan frame, in a state where the clip portion 50 and the hook portion 59 are arranged at predetermined positions inside the cylindrical plate portion 24b, the spring portion 55 includes the both end portions 55a, 55b is arranged on the outer side of the cylindrical plate portion 24 in a form along the outer surface of the cylindrical plate portion 24b, and the circular curved portion 56 is also disposed on the outer side of the cylindrical plate portion 24b. Interference between 56 and the cylindrical plate portion 24b is avoided. Further, the direction of expansion and contraction of the spring portion 55 is along the outer surface of the tubular plate portion 24, and the tensile load of the spring portion 55 is reduced. In addition, since the clip portion 50 has a semi-clip shape in the present embodiment, the clip portion 50 comes into planar contact with the inside of the cylindrical plate portion 24b, so that the fixing of the right locking member 5 is stabilized.

  As described above, the right locking device 5 has the clip portion 50 formed at one end portion thereof sandwiched between the right portion of the ventilation fan frame and the hook portion 59 formed at the other end portion of the right locking device 5. The right portion of the ventilation fan cover 1 is fixed to the right portion of the ventilation fan frame while being hooked on the right portion of the fan 2. In this state, the clip part 50 and the hook part 59 are pulled so as to be attracted to each other by the spring part 55 interposed therebetween. The right part of the ventilation fan cover 1 and the right part of the ventilation fan frame are fixed by the tensile force of the spring part 55.

  Similarly, the left part of the ventilation fan cover 1 is fixed to the left part of the ventilation fan frame using the left locking member 4.

  FIG. 9 is an enlarged side view showing a state in which the latch is attached to the ventilation fan frame removed from the large ventilation fan and the ventilation fan cover is being covered, and FIG. 10 is attached to the large ventilation fan with the latch attached. FIG. 11 is a partially cut-away plan view showing a state in which the ventilation fan cover is being put on the ventilation fan frame, and FIG. 11 is an enlarged side view of the ventilation fan cover in a state where the ventilation fan frame of the large-sized ventilation fan is locked by the locking device. , FIG. 12 is an enlarged view of the portion B shown in FIG. 11, FIG. 13 is a partial plan sectional view of the ventilation fan cover in the state shown in FIG. 11, and 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 a locking tool is locked.

  FIG. 16 is an enlarged side view of the ventilation fan cover in a state where the ventilation fan frame is locked to the ventilation fan frame of the small ventilation fan by the locking device, and FIG. 17 is an enlarged view of a portion D shown in FIG. 18 is a partial plan sectional view of the ventilation fan cover in the state shown in FIG. 16, and FIG. 19 is an enlarged sectional view of a portion E shown in FIG.

  With reference to these figures, the ventilation fan cover 1 is configured to be attachable to the ventilation fan frames 11, 13 of the ventilation fans 10, 12 according to two standards, large and small. In addition, the standard regarding the size of the ventilation fans 10 and 12 is a standard regarding the size of the blades of the propellers 10a and 12a.

  The ventilation fan frame 11 of the ventilation fan 10 (hereinafter, referred to as “large ventilation fan 10”) according to the larger standard shown in FIGS. 9 to 15 has a flat plate having an intake port (not shown) as described in the background art. It comprises a portion 11a and a rectangular plate portion 11b. A square outer peripheral corner 11c is formed between the flat plate 11a and the cylindrical plate 11b. The end of the cylindrical plate 11b opposite to the flat plate 11a is an open end. Here, the description will be made on the assumption that the flat plate portion 11a is formed in a vertical plate shape at the front end of the cylindrical plate portion 11b, and is disposed in front of the propeller 10a of the ventilation fan 10.

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

  Referring to FIG. 10, thereafter, the ventilation fan frame 11 is returned to a predetermined position of the ventilation fan 10, and the clip portions 40, 50 of the locking tools 4, 5 disposed inside the cylindrical plate portion 11 b of the ventilation fan frame 11 are connected to the ventilation fan 10. The state is sandwiched between the base frame 10b of 10 and the cylindrical plate 11b of the ventilation fan frame 11.

  In this way, the outer peripheral cover portion 24 is provided by fitting the outer peripheral corner portion 24c of the outer peripheral cover portion 24 of the ventilation fan cover 1 to the outer peripheral corner portion 11c of the ventilation fan frame 11 with the locking members 4 and 5 provided on the ventilation fan 10. The state of contact with the ventilation fan frame 11 is ensured. This 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 or close proximity to each other, or the cylindrical plate portion 24b of the outer peripheral cover portion 24 and the cylindrical plate portion of the ventilation fan frame 11 11b is in a close or close state, or both. Note that the ventilation fan frame 11 does not necessarily need to be in contact with the entire circumferential direction, 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 circumferential direction. Further, as described above, the cover body 2 of the ventilation fan cover 1 is made of a synthetic resin or the like so that its front and back surfaces have a smooth surface without unevenness, so that the outer peripheral cover portion 24 and the ventilation fan frame 11 Can be kept in contact.

  If there is a gap between the ventilation fan cover 1 and the ventilation fan frame 11, the air containing oil 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 and 22a, and the ventilation fan cover is attached. Even if it does, the ventilation fan gets dirty. Therefore, as described above, by setting the gap between the ventilation fan cover 1 and the ventilation fan frame 11 in a reduced state, it is possible to suppress oil contamination from the gap of the ventilation fan cover.

  In addition, even when the oil passes through the intake ports 22 and 22a, the oil contained in the air may not be completely removed by the filter 3, and in this case, the oil contacts the rear side of the ventilation fan cover so that the oil is The amount of oil 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 projects forward from the outer peripheral cover portion 24 in a front view. By being connected, in a state where the outer peripheral cover portion 24 is put on the ventilation fan frame 11, when the surface area of the back surface of the ventilation fan cover 1 in contact with the intake air between the intake ports 22 and 22 a and the propeller 10 a is not stepped, It will increase in comparison. As a result, the amount of oil contained in the air mixed with the intake air can be increased while the air containing the oil passes through the intake ports 22 and 22a and reaches the propeller 10a of the ventilation fan 10. Further, since the intake ports 22 and 22a are far away from the propeller 10a in this way, the suction pressure to the propeller 10a, which causes contamination of the filter 3, does not concentrate on the central portions of the intake ports 22 and 22a. Oil stains can be evenly removed over a wide range of the entire area 22a.

  From this state, the user holds the hook portion 49 of the left locking member 4 by hand and moves to the left locking portion 25 of the ventilation fan cover 1 and inserts the inside of the ventilation fan cover 1 through the locking hole 25a. Similarly, the right locking device 5 is also moved to the right locking portion 26 of the ventilation fan cover 1 by holding the hook portion 59 by hand, and is inserted into the ventilation fan cover 1 through the locking hole 26a. Thereby, the locking of the ventilation fan cover 1 to the ventilation fan frame 11 via the left and right locking members 4 and 5, that is, the attachment of the ventilation fan cover 1 to the ventilation fan 10 is completed.

  The manner of operation of each part of the locking tools 4 and 5 when the hooks of the locking tools 4 and 5 are locked to the locking parts 25 and 26 of the ventilation fan cover 1 will be described. Here, only the right locking tool 5 will be described as a representative of both the locking tools 4 and 5.

  The catch 5 with the clip 50 sandwiched between the ventilation fan frame 11 is grasped by hand, and the hook 59 is inserted into the catch hole 26a of the catch 26 using the action of the catch 5 described later. And lock.

  Here, since the cylindrical plate portion 11b of the ventilation fan frame 11 of the large-sized ventilation fan 10 is close to or close to the cylindrical plate portion 24b of the outer peripheral cover portion 24 of the ventilation fan cover 1, the cylindrical plate portion 11b is sandwiched in the left-right direction. The clip portion 50 of the locking device 5 and the locking hole 26a into which the hook portion 59 is inserted are close to each other. However, since 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 11 b of the ventilation fan frame 11 is connected to the rear end portion of the outer peripheral cover portion 24 (ie, the ventilation fan). The rear end of the cover 1 projects 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 such a state, as the hook portion 59 is pulled toward the front side to move to the locking hole 26a, the spring portion 55 is pulled forward and extends outside the cylindrical plate portion 24b. As a result, the second bent portion 57 reaches the position corresponding to the outer peripheral corner portion 24c. From this state, the fifth straight portion 58 is arranged along the flat plate portion 24a, and the hook portion 59 is engaged with the locking hole 26a. Can be reached.

  Further, at this time, the distance and the 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 arranged at the optimal position corresponding to

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

  On the other hand, similarly, when the hook portion 49 is pulled toward the left with the clip portion 49 holding the left rear end portion of the cylindrical plate portion 11b of the ventilation fan frame 11, the spring portion 45 is also pulled. Stretched. The hook portion 49 thus moved is inserted into the inside of the ventilation fan cover 1 through the locking hole 25 a of the left locking portion 25, so that the left portion of the ventilation fan cover 1 by the left locking member 4 is connected to the ventilation fan frame 11. The work of locking to the left part is completed.

  In this manner, the work of locking the ventilation fan cover 1 to the ventilation fan frame 11 by the left and right locking members 4 and 5 is completed, whereby the mounting of the ventilation fan cover 1 to the large ventilation fan 10 is completed.

  When removing the ventilation fan cover 1 from the ventilation fan frame 11, the fifth straight portion 58 and the second bent portion of the right locking member 5 are held while the clip portion 50 holds the cylindrical plate portion 11b of the ventilation fan frame 11. By holding the portion 57 or the fourth straight portion 56b, and pulling the fifth straight portion 58 forward, the hook portion 59 can be easily pulled out to the front outside of the locking hole 26a. Similarly, the hook portion of the left locking member 4 is pulled out from the locking hole 25a. Thus, by removing the locking members 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 can be easily removed from the ventilation fan cover 1 by pulling the ventilation fan cover 1 forward. be able to.

  After removing the ventilation fan cover 1, the locking members 4, 5 remain with the respective clip portions 40, 50 sandwiched between the ventilation fan frames 11, and remain provided in the ventilation fan 10. Therefore, they can also be used to lock the new ventilation fan cover 1 to the ventilation fan frame 11 after replacement.

  The ventilation fan frame 13 of the ventilation fan 12 (hereinafter referred to as “small ventilation fan 12”) according to the smaller standard shown in FIGS. 16 to 19 has a flat plate portion having an intake port (not shown), similarly to the ventilation fan frame 11. 13a and a rectangular cylindrical plate portion 13b. A square outer peripheral corner 13c is formed between the flat plate 13a and the cylindrical plate 13b. The end of the cylindrical plate 13b opposite to the flat plate 13a is an open end. Here, the description will be made on the assumption that the flat plate portion 13a is formed in a vertical plate shape at the front end of the cylindrical plate portion 13b, and is disposed in front of the propeller 12a of the small ventilation fan 12.

  When attaching the ventilation fan cover 1 to the small ventilation fan 12, first, similarly to the case of the large ventilation fan 10, the clip parts 40, 50 are sandwiched between the left and right rear ends of the ventilation fan frame 13, and the left and right locking members 4, 5 is provided in the small ventilation fan 12.

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

  Here, the state in which the inner peripheral cover portion 23 and the ventilation fan frame 13 are in contact with each other means that the flat plate portion 23a and the flat plate portion 13a are in close or close proximity, or that the cylindrical plate portion 23b and the cylindrical plate portion 13b are in close contact. It may be in a state of being close to or both of them, but may not necessarily extend over the entire circumference of the inner peripheral cover portion 23, but may be in a state in which a part thereof is in contact with the ventilation fan frame 13. Since the inner peripheral cover portion 23 and the ventilation fan frame 13 are in contact with each other, the air containing oil is supplied from the gap between the inner peripheral cover portion 23 and the ventilation fan frame 13 to the propeller 12 a of the ventilation fan 12 without passing through the filter 3. The fact that the oil stain of the ventilation fan 12 due to inhalation is suppressed and the smoothness of the surface of the inner peripheral cover 23 makes it easier to maintain a contact state are described in the outer cover 24. As you did.

  Thus, not only when the ventilation fan cover 1 is put on the ventilation fan frame 11 of the large ventilation fan 10, but also when the ventilation fan cover 1 is put on the ventilation fan frame 13 of the small ventilation fan 12, the gap between the ventilation fan cover 1 and the ventilation fan frame is not limited. In any case, the effect of removing the oil content from the intake air by the filter 3 by covering the ventilation fan cover 1 can be sufficiently obtained in any case.

  With the ventilation fan cover 1 covered with the ventilation fan frame 13 in this manner, the user holds the hook portion 59 of the right locking device 5 with his hand and pulls the hook portion 59 forward, and inserts it into the locking hole 26a. The hook portion 49 (see FIG. 10) of the left locking member 4 is inserted into the locking hole 25a in the same manner.

  Here, the cylindrical plate portion 13b of the ventilation fan frame 13 covered with the inner peripheral cover portion 23 is considerably different from the cylindrical plate portion 24b of the outer peripheral cover portion 24 arranged on the outer peripheral side of the inner peripheral cover portion 23. They are far apart. With respect to the right locking member 5, the spring portion 55 is extended rightward forward from the clip portion 50 sandwiching the right portion of the cylindrical plate portion 13b of the ventilation fan frame 13, and once the spring portion 55 is After disposing the hook portion 59 to the right outside of the right portion of the plate portion 24b, the hook portion 59 is moved to the left 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, in the state where the outer peripheral cover portion 24 is arranged along the ventilation fan frame 11 as described above, the extension direction of the spring portion 55 is the front-back direction along the cylindrical plate portion 24b of the outer peripheral cover portion 24. And the cylindrical plate portion 24b had almost no interference. However, in a state where the inner peripheral cover portion 23 is along the ventilation fan frame 13, the pulling direction of the spring portion 55 is in a direction intersecting the cylindrical plate portion 24 b of the outer peripheral cover portion 24, and the spring portion 55 and the cylindrical plate portion 24 b Interference may occur.

  Here, since the first bent portion 53 is formed, 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 need. Thus, the second bent portion 57 is disposed at a position corresponding to the outer peripheral corner portion 24c by pulling the spring portion 55, and the hook portion 59 can be inserted into the locking hole 26a.

  The problem of the interference between the spring portion 55 of the locking member 5 and the ventilation fan cover 1 as described above occurs when the inner peripheral cover portion 23 of the ventilation fan cover 1 is put on the small ventilation fan frame 13. In the ventilation fan cover 1, since the outer peripheral cover portion 24 is formed at the outer peripheral end thereof, when the outer peripheral cover portion 24 of the ventilation fan cover 1 is put on the large ventilation fan frame 11, does this problem occur? Even if it occurs, it is slight. Also, when a ventilation fan cover having an outer peripheral end whose size is adjusted to that of the small ventilation fan frame 13 is put on the ventilation fan frame 13, this problem does not occur, or the problem does occur slightly.

  As described above, if the outer peripheral end of the ventilation fan cover and the ventilation fan frame to be covered are the same size, the first bent portion 53 between the clip portion 50 and the spring portion 55 is formed. It is not necessary to alleviate the interference caused by the interference. Therefore, in such a case, the portion between the clip portion and the tension spring portion is a ventilation fan cover having a straight portion without a bent portion such as the first bent portion 53 of the locking tool 5. It is also possible to use a locking device.

  Further, the clip portion of the ventilation fan cover locking device according to the present application may not have a semi-clip shape like the clip portions 40 and 50 of the locking devices 4 and 5 shown in the drawings. Any shape may be used as long as it is suitable for holding the ventilation fan frame.

  As described above, on behalf of the locking tools 4 and 5, the locking tool 5 is a ventilation fan cover locking tool for locking the ventilation fan cover 1 to the ventilation fan frame 11 or the ventilation fan frame 13, and is bent. It is formed on one end portion of the linear body, is formed on one end side of the linear body, and is formed on the other end side portion of the linear body, with a clip portion 50 capable of holding the ventilation fan frame 11 or the ventilation fan frame 13, A hook portion 59 which can be locked to the ventilation fan cover 1, a spring portion 55 which is a coil-shaped tension spring portion formed between the clip portion 50 and the hook portion 59, and a portion between the clip portion 50 and the spring portion 55. And a second bent portion 57 formed between the hook portion 50 and the spring portion 55 and formed by bending the linear body. It is provided with.

  With such a configuration, for example, when the ventilation fan cover 1 of one specification is put on the ventilation fan frames 11 and 13 having different sizes, the clip portion 50 holds the ventilation fan frame 11 or the ventilation fan frame 13 while holding the hook portion 59. Is locked to the ventilation fan cover 1, the second bent portion 57 corresponds to the outer peripheral corner 24 c of the ventilation fan cover 1, corresponding to the edge of the outer portion (the tubular plate portion 24 b) of the ventilation fan cover 1. The ventilation fan cover 1 is placed on the large or small ventilation fan frames 11 and 13 in such a state that the spring portion 55 is disposed outside the outside portion (the cylindrical plate portion 24b) of the ventilation fan cover 1 without being forcibly pulled. It is secured even when it is put on. Therefore, the object of the present invention can be solved. Further, since the locking member 5 is formed of one linear body, the cost can be further reduced.

  In addition, the locking member 5 further includes a circular curved portion 56 formed between the spring portion 55 and the second bent portion 57 by being wound in a direction substantially perpendicular to the winding direction of the spring portion 55. Things.

  With such a configuration, even when a change in the distance or the relative direction occurs between the hook portion 59 and the spring portion 55, the change in the distance and the relative direction is caused by the elastic deformation of the circular curved portion 56, and the second bent portion 57 performs the elastic deformation. There is no need to force the angle to change. Therefore, the problem caused by forcibly pulling the spring portion 55 as described above can be more reliably avoided, and the cost reduction effect of the locking member 5 can be further ensured. Further, since the circular curved portion 56 is disposed between the second bent portion 57 and the spring portion 55, the circular curved portion 56 is disposed together with the spring portion 55 on the outer side of the outer portion (the cylindrical plate portion 24b) of the ventilation fan cover 1. . Therefore, interference between the ventilation fan cover 1 and the circular curved portion 56 is avoided.

  The locking member 5 includes a first end portion 55 a of the spring portion 55 connected to the first bent portion 53 and a spring portion connected to the second bent portion 57 when viewed in the axial direction of the spring portion 55. 55 and the second end 55b are disposed at substantially the same position in the circumferential direction of the spring 55, and the clip 50 and the hook 59 are connected to the spring 55 via the first end 55a and the second end 55b. 55 are disposed on the opposite side.

  With this configuration, the clip portion 50 is disposed so as to sandwich the ventilation fan frame 11 or the ventilation fan frame 13, and the hook portion 59 is disposed so as to be engaged with the ventilation fan cover 1 even when the ventilation fan frame 11 or the ventilation fan frame 13 is engaged. The spring portion 55 can be disposed outside the ventilation fan cover 1 placed on the ventilation fan frame 13, and a state in which the expansion and contraction operation of the spring portion 55 and the ventilation fan cover 1 do not cause excessive interference can be ensured. Therefore, the attachment / detachment operation of the locking member 5 to / from the ventilation fan cover 1 is facilitated, and problems such as breakage of the ventilation fan cover 1 by the locking member 5 are also avoided.

  The above description assumes that the propeller shaft of the ventilation fan is arranged in the front-rear direction and the ventilation fan cover is attached to the front of the ventilation fan frame, but the direction of the propeller axis of the ventilation fan is various, for example It is possible that a ventilation fan is provided on the ceiling, the propeller shaft is vertical and the ventilation fan cover is mounted below the ventilation fan frame. That is, the ventilation fan cover can correspond to the ventilation fan frame arranged in any manner.

  Further, the material of the cover body of the ventilation fan cover is not limited to the synthetic resin as described above, and may be, for example, a molded product made of aluminum foil which has been conventionally used as a ventilation fan cover.

  Furthermore, the shape of the ventilation fan cover used together with the locking device may be any shape that can be appropriately attached to the ventilation fan frame using the locking device, and the shape is limited to the specific shape described in the specification. is not.

  Furthermore, the locking member is not limited to a single linear member made of metal such as iron, and the material is not limited to metal as long as it can withstand the attachment of the ventilation fan cover.

  FIG. 21 is a plan view of the ventilation fan cover locking device according to the second embodiment of the present invention, and corresponds to FIG.

  Since the description is basically the same as that of the first embodiment, the description will focus on the differences.

  As described above, a portion between the clip portion and the extension spring portion is a ventilation fan cover locking device having a straight portion without a bent portion such as the first bent portion 53 of the locking device 5. It is also possible.

  Therefore, in the ventilation fan cover locking device according to the second embodiment, the connection between the clip portion 50 and the spring portion 55 is changed to the connection portion 101 formed of a linear linear body.

  That is, in the first embodiment, the connection between the clip portion 50 and the spring portion 55 includes the first bent portion 53 formed by bending a linear body, whereas the connection between the clip portion 50 and the spring portion 55 includes the second bent portion. In the embodiment, the connection from the end 51 of the clip portion 50 to the first end 55 a of the spring portion 55 is made linear by the connection portion 101.

  Even with such a configuration, since the ventilation fan frame is sandwiched by the clip portion 50 and the ventilation fan cover is fixed by the second bent portion (bent portion) 57 and the hook portion 59, the mounting structure has various sizes and shapes. The mounting state of the ventilation fan cover and the ventilation fan frame is stabilized. Further, since it is not necessary to bend and manufacture the linear body in the connection between the clip portion 50 and the spring portion 55, the bending process can be reduced and the manufacturing is cost-effective.

  In each of the above embodiments, the connection between the clip portion and the spring portion is formed by bending a linear body or by a linear linear body, but is not limited to this. . The connection between the clip portion and the spring portion may be formed by curving a linear body into a curved shape.

  Further, in each of the above-described embodiments, the spring portion is formed by a coil-shaped extension spring. However, the present invention is not limited to this.

DESCRIPTION OF SYMBOLS 1 ... Ventilation fan cover 4, 5 ... Locking tool 10 ... Large ventilation fan 11 ... Ventilation fan frame 12 ... Small ventilation fan 13 ... Ventilation fan frame 50 ... Clip part 53 ... First bent part 55 ... Spring part (coiled tension spring part)
55a: first end 55b: second end 56: circular curved portion 57: second bent portion 59: hook portion 101: connecting portion In the drawings, the same reference numerals indicate the same or corresponding parts.

Claims (4)

A ventilation fan cover locking device for locking the ventilation fan cover to the ventilation fan frame,
It consists of one linear body that has been bent,
A clip portion formed at one end portion of the linear body and capable of holding the ventilation fan frame;
A hook portion formed at the other end portion of the linear body and capable of being locked to the ventilation fan cover;
A coil-shaped tension spring portion formed between the clip portion and the hook portion,
A first bent portion formed between the clip portion and the tension spring portion and bending the linear body;
A ventilation fan cover locking device, comprising: a second bent portion formed between the hook portion and the tension spring portion and bending the linear body.   The ventilation fan according to claim 1, further comprising a circular curved portion formed between the extension spring portion and the second bent portion and wound in a direction substantially perpendicular to a winding direction of the extension spring portion. Cover latch.   A first end portion of the extension spring portion connected to the first bent portion and a second end portion of the extension spring portion connected to the second bent portion as viewed in the axial direction of the extension spring portion; Are disposed at substantially the same position in the circumferential direction of the tension spring portion, and the clip portion and the hook portion are on opposite sides of the tension spring portion via the first end and the second end. The ventilation fan cover locking device according to claim 1 or 2, wherein the ventilation fan cover locking device is disposed at a position. A ventilation fan cover locking device for locking the ventilation fan cover to the ventilation fan frame,
It consists of one linear body that has been bent,
A clip portion formed at one end portion of the linear body and capable of holding the ventilation fan frame;
A hook portion formed at the other end portion of the linear body and capable of being locked to the ventilation fan cover;
A telescopic part formed between the clip part and the hook part,
A connection portion that connects between the clip portion and the tension spring portion,
A ventilation fan cover locking device, comprising: a bent portion formed between the hook portion and the extension spring portion, the bent portion being formed by bending the linear body.

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