JP2013163997A - Fan guard device, and fan provided with the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fan guard device enabling easy fixation of a front guard and a back guard without risk of easy detachment of the front guard, and to provide a fan provided with the same.SOLUTION: A fan guard device surrounds a blower fan 2 with a front guard 5 for covering a site ahead of the fan 2 and a back guard 4 for covering a site rearward of the fan 2. Engaging means 13, 26 are provided between the front guard 5 and the back guard 4, both the means being engaged to each other by relative movement of both the guards and inhibiting movement of both the guards in the front and back separation directions. A supporting part (through hole 14) is provided for supporting a fixing pin 6 slidably to either the front guard 5 or the back guard 4. An inserting part (groove 29) is provided to the another for inserting the fixing pin 6 therein in a state in which the engaging means 13, 26 are engaged to each other. By insertion of the fixing pin 6 into the inserting part (groove 29), the relative movement of both the guards is prevented.

Description

  The present invention relates to a fan in which a fan guard that covers a fan for blowing air can be freely attached and detached.

  As a fan guard fixing mechanism that covers the blower fan, for example, there are those described in Patent Documents 1 and 2.

  FIG. 1 and FIG. 2 of Patent Document 1 describe a fan guard in which a front guard 101 is attached to a rear guard 104 by a clip 103. Also, in FIG. 3, after fitting the L-shaped notch 5 formed in the ring 6 of the rear guard 4 and the rivet 2 protruding from the ring 3 of the front guard 1, the rear guard 4 is The fan guard which attaches the rear guard 4 to the front guard 1 by rotating in the circumferential direction is described.

Japanese Utility Model Publication No.59-107099

  However, in the fan guard described in FIGS. 1 and 2 of Patent Document 1, since the fixing mechanism is a clip type, the clip is easily detached when a finger is caught on the clip due to a child's mischief or the like. There are problems and aesthetics are bad. In addition, the fan guard shown in FIG. 3 has a problem that it easily comes off when a force is applied in the release direction due to the falling of the fan or the like.

  The present invention has been made in view of the above circumstances, and a purpose of the present invention is to provide a fan guard device in which the front guard and the rear guard can be easily fixed and the guard does not easily come off. It is to provide a fan equipped with it.

  The fan guard device of the present invention is a fan guard device that surrounds the fan with a front guard that covers the front of the fan for blowing and a rear girth that covers the rear of the fan, and between the front guard and the rear guard. Is provided with an engaging means for engaging the two guards by relative movement and preventing the two guards from moving in the front-rear separation direction, and further, a fixing pin for preventing the two guards from moving relative to each other. One of the front guard and the rear guard is provided with a support portion that slidably supports the fixing pin, and the other is engaged with the engagement means. An insertion portion into which a fixing pin is inserted is provided, and the relative movement of the two guards is prevented by inserting the fixing pin into the insertion portion.

  According to the present invention, the front guard and the rear guard are fixed by the two fixing mechanisms, and neither fixing requires a complicated operation, so the front guard and the rear guard can be easily fixed, and , The guard will not come off easily.

It is a disassembled perspective view of the electric fan which concerns on embodiment of this invention. It is the A section enlarged view of the rear guard shown in FIG. (A) is a side view of the front guard shown in FIG. 1, (b) is a rear view of the front guard shown in FIG. It is the B section enlarged view of the front guard shown in FIG. It is the C section enlarged view of the rear guard shown in FIG. It is the D section enlarged view of the front guard shown in Drawing 3 (b). It is a synthetic sectional view of the front guard, the rear guard, and the fixing pin after the first fixing and before the second fixing. It is a synthetic sectional view of the front guard, the rear guard, and the fixing pin after the first fixing and after the second fixing. (A) is the perspective view which looked at the fixing pin shown in FIG. 1 from the front side, (b) is the front view of the convex part vicinity of a fixing pin, (c) is the perspective view which looked at the fixing pin from the back side. .

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. FIG. 1 is an exploded perspective view of a fan 1 according to an embodiment of the present invention.

[Configuration of Fan 1]
As shown in FIG. 1, the electric fan 1 of the present invention has a fan 2, a main body 3, a rear guard 4, a front guard 5, a fixing pin 6, a rear guard tightening nut 7, and a spinner 8. A fan guard that is fixed by attaching the front guard 5 to the rear guard 4 is composed of a front surface, a side surface, and a rear surface, and is a cylindrical body that is substantially closed at both ends. In the present invention, the front guard 5 and the rear guard may be collectively referred to as both guards.

(Fan 2)
The fan 2 is a fan having a plurality of blades and rotating by driving of the motor 3b. As shown in FIG. 1, the fan 2 is fixed to the main body 3 by being tightened by a spinner 8 after the rear guard 4 is attached to the main body 3.

(Main unit 3)
The main body 3 is a base portion placed on a floor or the like, and includes a rotating shaft 3a for rotating the fan 2 and a motor 3b for rotating the fan 2 via the rotating shaft 3a. In addition, a U-shaped gripping portion 9 that supports a central portion of the motor 3b for rotating the fan 2 and includes a rotation mechanism for rotating in the vertical direction is provided, and the rotation shaft 3a is rotated vertically upward. be able to.

(Rear guard 4)
The rear guard 4 includes a back cover 11 having a circular outer periphery formed in a lattice shape with resin, metal, or the like, and a cylindrical side cover 12 extending from the outer periphery of the back cover 11 along the axial direction of the rotary shaft 3a. (Peripheral part) and the back of the fan 2 is covered by these covers. The rear guard 4 is fixed to the main body 3 by being tightened with a rear guard tightening nut 7 after a hole 11a formed in the center of the back cover 11 is inserted into the rotary shaft 3a. When fixed, the three holes 11b formed in the back cover 11 are related to the three protrusions 3c formed in the main body 3 (in FIG. 1, only one of the protrusions 3c is provided with a reference numeral). Since it stops, the rear guard 4 is positioned with respect to the main body 3.

(Front guard 5)
The front guard 5 includes a front cover 21 having a circular outer periphery formed of resin, metal, or the like, and a side cover 22 (peripheral part) extending from the outer periphery of the front cover 21 along the axial direction of the rotary shaft 3a. These covers cover the front of the fan 2. The front guard 5 is detachably attached to the rear guard 4 by fixing the side cover 22 to the side cover 12 of the rear guard 4.

  In the present embodiment, the side cover 12 of the rear guard 4 is longer than the side cover 22 of the front guard 5, but the present invention is not limited to this, and the side cover 12 may be shorter than the side cover 22. Alternatively, the side cover 12 and the side cover 22 may have the same length.

[Fixing front guard 5 and rear guard 4]
Next, the fixing of the front guard 5 and the rear guard 4 will be described in detail with reference to FIGS. In the present embodiment, the fixing of the front guard 5 and the rear guard 4 is divided into a first fixing and a second fixing as a temporarily fixed state.

(First fixing as temporarily fixed state)
First, the first fixing as a temporarily fixed state will be described in detail later, but the front guard 5 and the rear guard 4 are engaged by relative movement, and the front guard 5 and the rear guard 4 are separated in the front-rear direction (in FIG. 1). , Engaging means for preventing movement in the axial direction of the rotating shaft 3a is provided. The first fixing will be described mainly with reference to FIGS. FIG. 2 is an enlarged view of a part A of the rear guard 4 shown in FIG. As shown in FIG. 2, the side cover 12 of the rear guard 4 is provided with an engagement claw 13 (engagement means). The engagement claw 13 (engagement means) is formed on the end portion 12 b of the side cover 12 (end portion on the side where the front guard 5 is attached) and on the inner surface side of the side cover 12. The side cover 12 is provided so as to protrude in the radial direction. In FIG. 2, one engagement claw 13 is shown, but five engagement claws 13 are provided at regular intervals (every 72 °) along the periphery of the end portion 12b. However, the number of the engaging claws 13 can be selected as appropriate.

  FIG. 3A is a side view of the front guard 5, and FIG. 3B is a rear view of the front guard 5. As shown in FIG. 3A, the side cover 22 of the front guard 5 is divided into a first side surface 23, a second side surface 24, and a third side surface 25. The first side surface 23 is a side surface fixed to the side surface cover 12 of the rear guard 4. Then, the outer diameter of the first side surface 23 is made smaller than the inner diameter of the side cover 12 (particularly the inner diameter in the vicinity of the end 12b) so that the first side surface 23 is fitted to the inner peripheral side of the side cover 12. Yes. The first side surface 23 is provided with five engagement grooves 26 (engagement means) corresponding to the engagement claws 13 along the outer periphery of the first side surface 23 at regular intervals (every 72 °). In FIG. 3A, two of the five engagement grooves 26 are shown. Note that the number of the engagement grooves 26 can be appropriately selected as long as it is equal to or more than the number of the engagement claws 13. The second side surface 24 is a side surface having an outer diameter larger than the inner diameter of the side cover 12 of the rear guard 4 (particularly, the inner diameter in the vicinity of the end portion 12 b) and is substantially the same as the outer diameter of the side cover 12. The third side surface 25 is a side surface serving as an operation surface operated by the user when the front guard 5 is attached to and detached from the rear guard 4. The third side surface 25 has anti-slip irregularities on the inner side and the outer side over the entire area in the circumferential direction.

  FIG. 4 is an enlarged view of a portion B of the front guard 5 shown in FIG. 1 (that is, an enlarged view of the engaging groove 26). As shown in FIG. 4, the engagement groove 26 (engagement means) is a notch groove formed by the concave portion 27 and the flange portion 28. The concave portion 27 is a portion delimited by one end surface 27a, a notch surface 27b, the other end surface 27c (side end surface), a tip end surface 28a of the flange portion 28, an inner surface 28b of the flange portion 28, and a tapered surface 28c of the flange portion 28. Yes, it penetrates in the radial direction of the first side surface 23 (it is possible not to penetrate depending on the shape of the engaging claw 13). In the concave portion 27, the width from the one end surface 27a to the tip end surface 28a of the flange portion 28 is larger than the width 13a (see FIG. 2) of the engaging claw 13 so that the engaging claw 13 can be fitted. Further, the depth from the one end 23a of the first side surface 23 to the notch surface 27b is made larger than the thickness 13b (see FIG. 2) of the engaging claw 13. In addition, the width from the inner surface 28b of the collar portion 28 to the notch surface 27b is substantially the same as the thickness 13b (see FIG. 2) of the engaging claw 13. Next, the flange portion 28 is a protrusion protruding from the other end surface 27c (side end surface) of the recess 27, and the length from the other end surface 27c of the recess 27 to the front end surface 28a is the width 13a (see FIG. 2). However, it may be larger or smaller than the width 13a.

  The first fixing is performed by engaging the engaging claw 13 and the engaging groove 26 described above. Specifically, first, the positions of the concave portion 27 of the front guard 5 (the opening portion of the concave portion 27 from the one end surface 27a to the front end surface 28a of the flange portion 28) and the engaging claw 13 of the rear guard 4 are aligned (electric fan). 1 when viewed from the front side, the concave portion 27 and the engaging claw 13 overlap), and the front guard 5 is pushed into the rear guard 4 side so that the concave portion 27 is fitted to the engaging claw 13 and the concave portion 27 27 is brought into contact with the belly 13c (see FIG. 2) of the engaging claw 13. This means that the peripheral edges (side cover 22 and side cover 12) are aligned at a predetermined position. Then, by rotating the front guard 5 by a predetermined angle in the circumferential direction (particularly counterclockwise when the electric fan 1 is viewed from the front side in the circumferential direction), the engagement claw 13 and the collar portion 28 are engaged with each other and engaged. The claw 13 and the engagement groove 26 are engaged, and the front guard 5 is fixed to the rear guard 4. As described above, the first fixing of the front guard 5 and the rear guard 4 is completed. The predetermined angle is determined by the predetermined position and the length from the other end surface 27c to the front end surface 28a.

(First fixed modification)
In the present embodiment, the engaging claws 13 are formed on the inner peripheral surface of the side cover 12, but may be formed on the outer peripheral surface of the side cover 12. Further, the side cover 12 may be provided with the engagement groove 26, and the side cover 22 may be provided with the engagement claw 13. However, in the case of these modified examples, one of the outer diameter and inner diameter of the side cover 12 and the other of the side cover 22 are appropriately set so that the engaging claw 13 and the engaging groove 26 are engaged. It is necessary to adjust the size relationship.

  Further, the side cover 12 may not be provided on the rear guard 4, and the engaging claw 13 may be protruded radially outward from the outer periphery of the back cover 11. However, in the case of this modification, the outer diameter of the back cover 11 (the portion excluding the engagement claws 13) is set to the front guard 5 so that the engagement claws 13 and the engagement grooves 26 are engaged. It is necessary to make it smaller than the inner diameter of the side cover 22. In the case of this modification, the peripheral portion of the rear guard 4 is a part of the back cover 11 and includes the entire outer periphery of the back cover 11.

  When the engaging claw 13 is provided on the front guard 5, the engaging claw 13 may be protruded radially outward from the outer periphery of the front cover 21 without providing the front cover 5 with the side cover 22. However, in the case of this modification, the outer diameter of the front cover 21 (the portion excluding the engagement claw 13) is set to the rear guard 4 so that the engagement claw 13 and the engagement groove 26 are engaged. It is necessary to make it smaller than the inner diameter of the side cover 12. In the case of this modification, the peripheral portion of the front guard 5 is a part of the front cover 21 and includes the entire outer periphery of the front cover 21.

  The fan guard surrounds the fan 2 with a front guard 5 that covers the front of the fan 2 and a rear guard 4 that covers the rear of the fan 2, and a side cover ( 12, 22) or both the front guard 5 and the rear guard 4 are provided with side covers (12, 22), and as a whole, a cylindrical body having substantially closed ends is formed.

  In the present embodiment, the first fixing is performed by engaging the engaging claw 13 and the engaging groove 26. However, the first fixing is not limited to the above method. For example, the first fixing may be performed by providing a male screw on one of the front guard 5 and the rear guard 4 and providing a female screw corresponding to the male screw on the other and screwing the male screw and the female screw together.

  Further, in the present embodiment, the front guard 5 is rotated by a predetermined angle in the circumferential direction, so that the front guard 5 is composed of a front surface, a side surface, and a rear surface that are fixed to the rear guard 4, and becomes a cylindrical body with both ends closed. Although the fan guard has been described, for example, it is composed of a square plate-shaped front guard covering the front of the fan 2 and a square vessel-shaped rear guard covering the rear of the fan 2, and the front guard 5 is provided with one rail at each end. The opening of the rear guard 4 is provided with a guide having two ends corresponding to the rails so as to be slid and temporarily fixed with respect to the opening of the rear guard 4. A fan guard that is engaged and temporarily fixed by relative movement of both guards can be applied.

(Second fixation)
Next, although the details will be described later, the second fixing is the first fixing as the temporary fixing state described above by providing the groove 29 (insertion portion) in one of the front guard 5 or the rear guard 4. In an engaged state of a certain engaging means, it is inserted into the groove 29 (insertion portion) and fixed by a fixing pin 6 that prevents the above-mentioned relative movement (rotation by a predetermined angle in the circumferential direction) of both guards 5, 4. It is. Details of the second fixing will be described with reference mainly to FIGS. FIG. 5 is an enlarged view of a portion C of the rear guard 4 shown in FIG. As shown in FIG. 5, a through hole 14 (see also FIG. 7) through which the fixing pin 6 (see FIGS. 1 and 9) is inserted is formed in the side cover 12 (peripheral edge) of the rear guard 4. A casing 15 (supporting part, fixing mechanism) is provided. The method for forming the housing 15 is not particularly limited, but may be formed integrally with the side cover 12 or may be formed integrally with the back cover 11. Further, these covers may be formed separately from the cover and attached to the side cover 12. However, in any case, the housing 15 is regarded as a part of the side cover 12 (peripheral edge) of the rear guard 4.

  The housing 15 is formed so that the insertion direction of the fixing pin 6 (that is, the axial direction of the through hole 14) is along the axial direction of the rotation shaft 3a (see FIG. 1). Further, the housing 15 is formed at a position that becomes the lower end of the rear guard 4 when the rear guard 4 is fixed to the main body 3 so as not to be removed accidentally or from the viewpoint of aesthetics. However, it may be formed at other positions. Moreover, although the housing | casing 15 is one, there may be multiple.

  FIG. 6 is an enlarged view of a portion D of the front guard 5 (rear view) shown in FIG. A groove 29 into which the fixing pin 6 is inserted is formed on the back surface and the lower end of the front guard 5. The groove 29 (insertion portion) is provided at a position corresponding to the housing 15 (the lower end of each guard), and the through hole 14 is obtained only by the first fixing of the front guard 5 and the rear guard 4. It comes to communicate with.

  Next, the second fixing mechanism will be described with reference to FIGS. FIG. 7 is a combined sectional view of the front guard 5, the rear guard 4, and the fixing pin 6 after the first fixing and before the second fixing. FIG. 8 is a composite sectional view of the front guard 5, the rear guard 4, and the fixing pin 6 after the first fixing and after the second fixing. These synthetic cross-sectional views are cross-sectional views corresponding to the cross section viewed from the direction of VII (VIII) -VII (VIII) shown in FIG. 5 (that is, the fixing pin 6 is inserted into the through hole 14 shown in FIG. 5 and FIG. 7 is a composite sectional view seen from the direction VII (VIII) -VII (VIII) when the front guard 5 and the rear guard 4 are fixed by the first fixing. 9A is a perspective view of the fixing pin 6 shown in FIG. 1 as viewed from the front side, FIG. 9B is a front view of the vicinity of the convex portion 31 of the fixing pin 6, and FIG. 9C is a fixing pin. It is the perspective view which looked at 6 from the back side.

  The fixing pin 6 is supported so as to be slidable in the front-rear direction along the inner surface of the side cover 12. As shown in FIG. 7, the front guard 5 and the rear guard 4 are fixed so that the first side surface 23 of the front guard 5 fits inside the side cover 12 of the rear guard 4. Further, the groove 29 formed in the front guard 5 communicates with the through hole 14 by the first fixing described above. Then, the fixing pin 6 inserted through the through hole 14 is inserted into the groove 29, whereby the second fixing is performed. Specifically, when the user pushes the fixing pin 6 inserted through the through hole 14 from the rear side of the rear guard 4 in the insertion direction of the fixing pin 6 (in the direction of arrow E in FIG. 7), the fixing pin 6 becomes the groove 29. And the second fixing is completed (see FIG. 8 for the state after completion). When the second fixing is completed, the rotation of the front guard 5 in the releasing direction of the first fixing is restricted. That is, even if the front guard 5 is rotated in the first fixing release direction (clockwise when the electric fan 1 is viewed from the front side), the fixing pin 6 is caught on the side end of the groove 29 and the first fixing is performed. Will not be released.

(Fixing of fixing pin 6)
The fixing pin 6 is fixed to the housing 15 at the same time as being inserted into the groove 29. Specifically, when the fixing pin 6 is inserted into the groove 29, the side surface of the fixing pin 6 (the surface of the outer peripheral surface of the fixing pin 6 that faces the insertion direction and the surface that faces the direction opposite to the insertion direction). Of the inner peripheral surface of the housing 15 that delimits (defines) the through-hole 14, and is provided on the surface facing the one surface. When the convex portions 16 are overcome and the convex portions engage with each other, the tips of the fixing pins 6 are held in the state where they are inserted into the grooves 29 (see FIG. 8). As a result, the engagement is not released unless a force greater than a certain acting force is applied in the direction opposite to the insertion direction. The “engagement” here includes not only the state in which the convex portions are engaged with each other but also the state in which the convex portion 31 is positioned closer to the front guard 5 than the convex portion 16. On the other hand, when a force greater than a certain acting force is applied in the direction opposite to the insertion direction (the direction opposite to the E direction), the protrusion 31 gets over the protrusion 16 again and the engagement is released. . Therefore, the fixing pin 6 can be freely inserted into and removed from the groove 29.

  Further, the convex portion 31 is formed so as to be elastically displaceable in a direction orthogonal to the insertion direction (E direction) of the fixing pin 6. Specifically, a U-shaped cut 31 a (see FIG. 9B) penetrating in the thickness direction of the fixing pin 6 is formed around the convex portion 31. Therefore, when the convex portion 31 gets over the convex portion 16, the convex portion 31 is elastically displaced in a direction perpendicular to the insertion direction, so that the fixing pin 6 is inserted into and removed from the groove 29 without requiring a large acting force. Can do. Note that the elastically displaceable shape is not limited to the shape shown above. Further, instead of the convex portion 31 or in addition to the convex portion 31, the convex portion 16 may also have a shape that can be elastically displaced. As a result, the fixing pin 6 can be inserted into and removed from the groove 29 with a smaller acting force. In addition, the convex part 16 does not have a shape that can be elastically displaced as described above, but may simply have a convex.

  In the present embodiment, the fixing pin 6 is fixed to the housing 15 by the engagement between the convex portion 31 and the convex portion 16, but if the fixing pin 6 and the housing 15 are engaged by the unevenness, the engagement is concerned. The case is not limited to the above embodiment. As an example of the engagement of the projections and depressions, in addition to engaging the projections, one of the side surface of the fixing pin 6 and the inner peripheral surface of the housing 15 that divides the through hole 14 is a projection, and the other is a recess. Engaging these irregularities is also included. Note that the fixing of the fixing pin 6 and the housing 15 is not limited to fixing by the unevenness.

(Preventing falling of fixed pin 6)
In addition, a fixing pin retaining means for restricting the sliding of the fixing pin in the direction opposite to the insertion direction of the fixing pin to a predetermined range is provided. Specifically, a step 17 is provided inside the housing 15 so that the fixing pin 6 does not fall out in the direction opposite to the insertion direction (the direction opposite to the E direction). As shown in FIG. 7, the step 17 is a step formed in a direction orthogonal to the insertion direction (not limited to the orthogonal direction). Therefore, even if the fixing pin 6 is extracted in the opposite direction, the convex portion 31 of the fixing pin 6 is held by the step 17 so that the fixing pin 6 cannot move in the opposite direction any more. As a result, the fixing pin 6 can be reliably prevented from falling off in the opposite direction. Further, a slope 18 is provided on the opposite side of the step 17 so that when the fixing pin 6 is inserted into the through-hole 14, it can be inserted without requiring a large acting force. Note that this step may be omitted. When the convex portion 31 that engages with the convex portion 16 is not provided on the fixing pin 6 (for example, when a concave portion is provided), the fixing pin 6 is not engaged with the convex portion 16 and is held by the step 17. A protrusion may be provided so that the fixing pin 6 is held by the step 17.

  Further, as shown in FIG. 8, one end of the fixing pin 6 has a knob 32. The knob 32 is provided with a protrusion 33, and this protrusion 33 is connected to the end face 19 of the housing 15 when the fixing pin 6 is inserted into the groove 29 (that is, in the state of FIG. 8). The user can easily pull out the fixing pin 6 from the groove 29 by placing a finger in the gap d and hooking the lower end 33a of the protrusion 33. ing. At this time, the arc-shaped portion that is the end face of the knob 32 is flush with the arc-shaped portion that is the end face of the peripheral portion (housing 15) of the rear guard, and the fan is viewed from any direction. Even in a state where the periphery of the guard is exposed and the rotating shaft 3a is vertically rotated upward, the user will not accidentally hook the knob. Moreover, all the 2nd fixing mechanisms are settled in a guard, and the beauty | look of the electric fan 1 is not spoiled. On the other hand, the lower end 33a of the protrusion 33 is located below the upper end 19a of the one end face 19, and when the first fixing and the second fixing are not performed (that is, with the front guard 5). When the rear guard 4 is removed), even if the fixing pin 6 moves in the insertion direction (E direction), the protrusion 33 may come into contact with the one end surface 19 and the fixing pin 6 may fall out in the insertion direction. Is prevented. Note that the knob 32 may not be provided.

(Second fixed modification)
In the present embodiment, the through hole 14 (housing 15) is provided in the side cover 12 of the rear guard 4 and the groove 29 is provided in the side cover 22 of the front guard 5, but the through hole 14 and the groove 29 are reversed. It may be provided on the guard.

  In the present embodiment, the through hole 14 is formed so that the insertion direction of the fixing pin 6 (the axial direction of the through hole 14) is along the axial direction of the rotary shaft 3a. What is the circumferential direction in the first fixing? If the directions are different, the insertion direction of the fixing pin 6 (the axial direction of the through hole 14) is not limited to the axial direction of the rotating shaft 3a.

  For example, in the portion where the side cover 12 and the first side surface 23 are fitted, a through hole that penetrates in the radial direction is provided in the side cover 12, and the insertion direction of the fixing pin 6 (the axial direction of the through hole 14) is the rotational axis. The direction may be orthogonal to 3a. In that case, a groove into which the fixing pin is inserted is provided in the first side surface 23, and the fixing pin 6 is inserted from the outer side of the outer periphery of the side cover 12. Note that the circumferential direction in the first fixing is excluded from the insertion direction of the fixing pin 6 (the axial direction of the through hole 14). The second fixing is performed when the insertion direction of the fixing pin 6 is the circumferential direction. However, it is possible to rotate the front guard 5 in the first fixing release direction, and the first fixing is released.

  Further, in the present embodiment, the convex portion 31 is provided on the inner peripheral surface of the casing 15 that divides the through hole 14, but may be provided on the inner peripheral surface of the side cover 22 of the front guard 5 that divides the groove 29. Moreover, you may provide a recessed part in the internal peripheral surface of the side cover 22 of the front guard 5 which divides the groove | channel 29 instead of a convex part.

Furthermore, as described above, the fan guard is formed of a cylindrical body having a front surface, a side surface, and a back surface, and substantially closed at both ends. For example, the back cover 11 is formed from a portion where the side covers 12 and 22 are in contact with the back cover 11. A substantially flat portion over the entire region, a portion of the substantially flat portion extending from the portion where the side covers 12 and 22 and the back cover 11 are in contact to the entire front cover 21, or in the radial direction of the back cover 11 and the front cover 21. A fixing mechanism (supporting part) for inserting and fixing the fixing pin 6 can be provided in the axial direction of the rotating shaft 3a of the belt-shaped side cover 22. That is, since the shape of the fan guard is a cylindrical body with both ends closed, the fixing mechanism can be easily provided inside the fan guard or inside the fan guard. When a fixing mechanism is provided in the axial direction of the rotating shaft 3 a of the side cover 22, a space for inserting and removing the fixing pin 6 can be secured by the width of the band of the side cover 22.
In a conventional flat spherical fan guard, in addition to providing a clip or the like on the outside of the fan guard and sandwiching and fixing from the outside, providing a fixing mechanism inside the fan guard Although it was difficult to make them close to each other, as described above, if the fan guard is a cylindrical body with both ends closed, it is easy to provide a fixing mechanism inside the fan guard without relatively affecting the air blowing. The fixing mechanism has few exposed parts.

  In addition, in the present embodiment, the example in which the fixing pin 6 is supported by the through hole 14 so as to be slidable in the front-rear direction along the inner surface of the side cover 12 is described. If there is a distance from the insertion opening of the pin 6 to the groove 29, a portion for guiding the fixing pin 6 to the groove 29 may be formed intermittently or partly in the middle. It may be a notch, or a separate guide portion may be provided.

  In the above-described embodiment, the retaining structure for preventing the fixing pin 6 from dropping is provided on the stepped surface 17 in the pulling direction of the fixing pin 6, the one end surface 19 in the inserting direction of the fixing pin 6, and the fixing pin 6. The protrusions 31 and the knobs 33 are prevented from coming off by contact with each other. However, the present invention is not limited to this. For example, a groove having both ends in the insertion / removal direction is provided on the guard side, and the protrusion 31 of the fixing pin 6 is provided in this groove. , And the protrusion 31 of the fixing pin 6 is slid within a predetermined range to both ends of the groove by moving the fixing pin 6 in and out, and the fixing pin 6 is provided with a groove on the side and the protrusion is provided on the guard side. As appropriate, the fixing pin 6 can be inserted by sliding a predetermined amount with respect to the groove 29 to prevent falling off.

  Further, regarding the insertion portion, in the present embodiment, the example of the groove 29 has been described. However, not only the groove 29 but also the tip of the fixing pin 6 is inserted to prevent relative movement of both guards. Well, if the fixing pin 6 is simply inserted into the hole, or if the fixing pin 6 has a retaining hole, it may be a through-hole, or it may be a notch. The tip shape of the pin 6 and the shape of the guard can be appropriately changed according to the embodiment.

(Effect 1)
Next, effects of the fan guard device and the fan shown in the present embodiment will be described. In the fan guard device of the present embodiment, an engagement means is provided between the front guard and the rear guard by engaging both guards relative to each other and preventing the guards from moving in the front-rear separating direction. In addition, a fixing pin that prevents relative movement of both guards is provided, and either one of the front guard and the rear guard is provided with a support portion that slidably supports the fixing pin, and the other is provided on the other side. The insertion portion into which the fixing pin is inserted in a state where the engaging means is engaged is provided, and the relative movement of both guards is prevented by inserting the fixing pin into the insertion portion.

  Therefore, the front guard is prevented by fixing the guard in a temporarily fixed state by the relative movement of both guards, which prevents the movement of both guards in the front-rear separation direction, and by fixing the both guards by the fixing pins. Since it is attached to the rear guard, the fan guard will not come off easily. In particular, the fixing pin cannot be fixed by inserting it into the insertion portion unless it is fixed in the temporarily fixed state. Therefore, the user does not attach an incorrect fan guard. For example, in a fan provided with two fixing mechanisms that can be operated separately, one user may not be fixed, but in the configuration of the present invention, two fixings are always performed. The front guard is hard to come off the rear guard. In addition, both the fixing in the temporarily fixed state and the subsequent fixing do not require a large acting force, and a tool is not used. Therefore, the front guard and the rear guard can be easily fixed. Furthermore, the fixing mechanism used for the fixing in the temporarily fixed state and the subsequent fixing has few portions exposed to the outside. Therefore, the fixing mechanism is rarely mistakenly removed due to a child's mischief or the like.

(Effect 2)
In addition, at least one of the front guard and the rear guard includes a cylindrical side cover. By using the cylindrical side cover, a fixing mechanism using a fixing pin can be provided inside the fan guard with a small portion exposed to the outside.

(Effect 3)
Further, the fixing pin is supported so as to be slidable in the front-rear separation direction along the inner surface of the cylindrical side cover. By using the width of the side cover, it is possible to secure a sufficient area for sliding the fixing pin, regardless of the cross-sectional shape (circular, square, etc.) of the cylindrical side cover. There is no need to approach the air blowing fan side, and air blowing performance is not impaired.

(Effect 4)
In addition, the front guard is provided with an insertion portion, the rear guard is provided with a side cover, and the fixing pin is inserted into the inner surface side of the side cover from behind the rear guard and is slidably supported. Usually, in the fan cleaning or the fan guard removal in the fan guard cleaning, it is assumed that the front guard is removed from the rear guard fixed to the main body. Since the front guard has a simple shape such as the front and the insertion part and does not have other parts, it is less likely to break the front guard during installation, removal, or in the middle of it. There is no loss. With this configuration, the user recognizes that the fixed pin is related to the rear guard, and therefore, it is possible to prevent the fixed pin from being lost by moving with the front guard.

(Effect 5)
In addition, the end opposite to the side where the fixing pin is inserted is formed so as to be at least flush with the end surface of the peripheral edge of the rear guard in a state where the fixing pin is inserted into the insertion portion. Has been. The fixing pin (fixing mechanism) has no portion exposed to the outside from the fan guard. For this reason, the fixing is not released due to the user's hooking and the appearance of the fan guard can be beautiful as designed.

(Effect 6)
Further, the opposite end has a knob, and there is a gap between the front face of the knob and the end face of the peripheral edge of the rear guard in a state where the fixing pin is inserted into the insertion portion. When the user puts a finger into the gap and hooks the knob, the fixing pin can be easily extracted from the insertion portion.

  In addition, since the fixing does not require a complicated operation, the front guard and the rear guard can be easily fixed, and the guard does not easily come off due to a force applied in the release direction due to a fall or the like. The electric fan provided with the fan guard apparatus mentioned above can be provided.

(Other effects)
Further, the through hole is provided in the peripheral edge portion of the rear guard, and is formed so that the insertion direction of the fixing pin is along the axial direction of the rotation shaft. That is, the insertion portion is formed at the peripheral edge portion of the front guard. Therefore, the fixing pin is inserted into the insertion portion from the rear of the rear guard. As a result, it is difficult to contact the fixing pin, and the fixing mechanism is less likely to be mistakenly removed. Moreover, since there are few parts which the through-hole and insertion part with respect to a ventilation direction occupy compared with the case where a through-hole and an insertion part are provided along the radial direction of a fan, ventilation property is good.

(Other effects)
A fixing pin is inserted into the insertion portion on one of the inner peripheral surface of the peripheral portion that delimits (defines) the through-hole and the inner peripheral surface of the peripheral portion that delimits (defines) the insertion portion, and the side surface of the fixing pin. When the fixing pin is pulled out from the insertion portion, an unevenness is provided so that the engagement is released. Therefore, at the time of performing the second fixing, the fixing pin is fixed to either the through hole or the insertion portion at the same time. Moreover, since the said fixation is cancelled | released when extracting a fixing pin, a front guard and a rear guard can be made removable.

(Other effects)
Further, one of the inner peripheral surface of the peripheral edge that divides the through-hole and the inner peripheral surface of the peripheral edge that divides the insertion portion, and one of the side surfaces of the fixing pin are provided with convex portions. And the convex part is formed so that elastic displacement is possible in the direction orthogonal to the insertion direction of a fixed pin. Therefore, the fixing pin can be inserted and removed with a small acting force.

(Other effects)
Further, a step for holding the fixing pin is formed on the inner peripheral surface of the peripheral edge that divides the through hole so that the fixing pin does not fall off on the side opposite to the side communicating with the insertion portion of the through hole. Therefore, it is possible to prevent the fixing pin from falling off to the opposite side.

(Other effects)
In addition, when the fixing pin is inserted into the insertion portion, the one end of the fixing pin has a gap with the opposite end portion of both end portions of the through hole, and the first fixing is not performed. Is provided with a knob for locking to the end so that the fixing pin does not fall off to the side communicating with the insertion portion of the through hole. Therefore, the fixing pin can be easily extracted from the insertion portion by hooking a finger into the gap. Further, when the first fixing is not performed (when the front guard and the rear guard are removed), it is possible to prevent the fixing pin from dropping out in the insertion direction side.

(Other effects)
One of the engaging means provided on the peripheral edge of the front guard and the peripheral edge of the rear guard is an engaging claw, and the other protrudes from a concave portion into which the engaging claw fits and a side end surface of the concave portion. It is an engagement groove formed by a flange that meshes with the engagement claw by rotating the front guard by a predetermined angle in the circumferential direction while being fitted in the recess. Therefore, the first fixing can be performed with a simple operation.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be made as long as they are described in the claims.

  In the present embodiment, the placement type electric fan used by being placed on the floor or the like and the fan guard device provided in the electric fan are shown. However, the electric fan of the present invention is a circulator that circulates room air, the main body is a ceiling, etc. It can also be used for other electric fans such as a mounting type electric fan that is used by being attached to a fan.

DESCRIPTION OF SYMBOLS 1 Fan 2 Fan 3 Main body 3a Rotating shaft 3b Motor 4 Rear guard 5 Front guard 6 Fixing pins 12, 22 Side cover (peripheral part)
13 engaging claw (engaging means)
14 Through-hole 15 Housing (support part)
16, 31 Convex part 17 Step (fixing pin retaining means)
26 engaging groove (engaging means)
27 Concave portion 28 Gutter portion 29 Groove (insertion portion)
32 knobs

Claims (8)

In the fan guard device that surrounds the fan with a front guard that covers the front of the fan for blowing and a rear gird that covers the rear of the fan,
Between the front guard and the rear guard, an engagement means is provided that engages by relative movement of both guards and prevents the movement of both guards in the front-rear separating direction,
Furthermore, a fixing pin that prevents the relative movement of the two guards is provided,
One of the front guard and the rear guard is provided with a support portion that slidably supports the fixing pin, and the other is inserted with the engaging means engaged. An insertion section is provided,
The fan guard device according to claim 1, wherein relative movement of the two guards is prevented by inserting the fixing pin into the insertion portion.   The fan guard device according to claim 1, wherein at least one of the front guard and the rear guard includes a cylindrical side cover.   The fan guard device according to claim 2, wherein the fixing pin is supported so as to be slidable in the front-rear separation direction along the inner surface of the side cover. The front guard is provided with the insertion portion, and the rear guard is provided with the side cover,
4. The fan guard device according to claim 3, wherein the fixing pin is inserted into an inner surface side of the side cover from behind the rear guard and is slidably supported. 5. The end of the fixing pin opposite to the side inserted into the insertion portion is
5. The fan guard device according to claim 4, wherein the fixing pin is formed so as to be at least flush with an end face of a peripheral edge portion of the rear guard in a state where the fixing pin is inserted into the insertion portion.   The said opposite side edge part has a knob, and in the state which inserted the said fixing pin in the said insertion part, it has a clearance gap between the said knob and the end surface of the peripheral part of the said rear guard. The fan guard device described in 1.   The fan guard device according to any one of claims 1 to 6, further comprising a fixing pin retaining unit that restricts sliding of the fixing pin in a direction opposite to a direction in which the fixing pin is inserted into a predetermined range.   An electric fan provided with the fan guard apparatus of any one of Claims 1-7.

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