JP2008177613A - Fan unit fixture - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fan unit fixture for fixing a fan unit to the frame of an apparatus by utilizing screw holes provided around the housing of the fan unit while suppressing transmission of vibration of the fan unit to the frame well. <P>SOLUTION: The fan unit fixture 10 has a first damping member 11 held between the housing 4 of the fan unit 1 and the frame 6, and a second damping member 12 held between the head 5b of a fixing screw 5 and the housing 4. A first hole 11a bored in the first damping member 11 and capable of inserting the thread portion 5a of a fixing screw 5, and a second hole 12a bored in the second damping member 12 and capable of inserting the thread portion 5a are formed smaller than a screw hole 4a. When the fixing screw 5 is tightened, the fixing screw 5 does not touch the housing 4 directly and the housing 4 does not touch the frame 6 directly, thereby vibration of the fan unit 1 is hardly transmitted to the frame 6. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a fan unit fixture for fixing a fan unit including a DC motor and a cooling fan in a housing and having a fixing screw hole around the housing to the frame. The present invention relates to a fan unit fixture capable of satisfactorily suppressing vibrations of a fan unit from being transmitted to a frame.

  2. Description of the Related Art Conventionally, a DC motor and a cooling fan are built in a housing and attached to a frame of various devices such as a personal computer and a printer as an integrated fan unit. In addition, this type of fan unit is generally configured in a rectangular parallelepiped shape at both end surfaces in the air blowing direction (hereinafter referred to as the front-rear direction), and fixing screw holes are formed at the four corners. The fan unit configured as described above can be fixed to the frames of various devices by inserting fixing screws into the screw holes.

  However, since the fan unit generates vibration when the fan is driven, the vibration may be transmitted to the frame to generate noise. Therefore, cover the four corners of the fan unit with a fan unit fixture made of an elastic material, place the fan unit and the fan unit fixture on the frame, and then cover the bracket with a screw. It is fixed to the frame (see, for example, Patent Document 1).

  However, in this case, the fan unit is fixed by being sandwiched between the frame and the bracket via the fan unit mounting tool, and the screw holes provided at the four corners of the fan unit are not utilized. In addition, since it is necessary to cover the fan unit with a bracket, the number of parts of the device including the fan unit increases and downsizing becomes difficult.

On the other hand, an attempt is made to arrange a rubber washer so as to surround the screw hole of the fan unit, and to suppress vibration transmitted from the fan unit to the frame by the rubber washer (for example, Patent Document 2). Non-Patent Document 1). In this case, although it is possible to suppress vibration to some extent directly from the fan unit housing to the frame, there is a possibility that the vibration may be transmitted through a fixing screw, so that noise may not be sufficiently prevented. There is.
JP 2001-313483 A JP 2004-49288 A “Shuttle ST61G4 SuperSilent”, <Silent 2>, [online], Oriospec Co., Ltd. [searched on August 12, 2004], Internet <URL: http://www.oliospec.com/windows/index_st61g4. html>

  Therefore, the present invention enables downsizing of the device by fixing the fan unit to the frame by utilizing the screw holes provided around the fan unit casing (not limited to the four corners). An object of the present invention is to provide a fan unit fixture that can satisfactorily suppress vibration from being transmitted to the frame of the device.

In order to achieve the above object, the present invention provides a fan for fixing a fan unit having a DC motor and a cooling fan built in a casing and having fixing screw holes around the casing to the frame. A first mounting member made of a damping material, disposed between an end face of the housing facing the frame in the vicinity of the screw hole, and made of a damping material; A fixing hole that is drilled in the vibration damping member and can be inserted into the screw hole and has a smaller diameter than the screw hole, and the fixing screw in the vicinity of the screw hole. A second damping member made of a damping material, disposed between the end surface of the housing facing the head of the housing and the head, and formed in the second damping member and fixed A second hole that can be inserted with a screw and has a smaller diameter than the screw hole, and And positioning means for positioning the first damping member and the second damping member so that the one hole portion and the second hole portion are arranged at the center of the screw hole. Yes.

  In the present invention configured as described above, the first damping member is disposed between the frame and the housing end surface facing the frame in the vicinity of the screw hole. Since the first damping member is made of a damping material, it is possible to satisfactorily suppress vibrations from being directly transmitted from the fan unit housing to the frame of the device or the like.

  In addition, a second vibration damping member is disposed between the housing end face facing the fixing screw head near the screw hole and the head. In addition, both the first hole formed in the first damping member and the second hole formed in the second damping member are configured to have a smaller diameter than the screw hole. The first hole and the second hole are arranged at the center of the screw hole by positioning means. For this reason, even when a fixing screw is inserted into the screw hole through the first hole portion and the second hole portion and the fan unit is fixed to the frame, the vibration of the fan unit is transmitted to the fixing screw. Can be suppressed. The positioning means that the first hole portion and the second hole portion are arranged at the center of the screw hole, as is obvious from these descriptions, it is not necessary to completely coincide with the center of the screw hole. The fixing screw inserted into the hole portion and the second hole portion may be of a level that does not contact the inner wall of the screw hole even when the fan is driven.

  As described above, by using the fan unit mounting tool of the present invention, the fan unit can be fixed to the frame by utilizing the screw holes provided around the casing of the fan unit. Therefore, it is not necessary to further provide the above-described bracket or the like, and the number of parts of the device to which the fan unit is attached can be reduced, and the device can be favorably downsized. Further, since it is possible to satisfactorily suppress the vibration of the fan unit from being transmitted directly to the frame or to the frame via the fixing screw, noise can be reduced satisfactorily.

  Note that various forms can be adopted as the positioning means in the present invention. For example, the positioning means connects the first damping member and the second damping member, and It may be a band-shaped member that can be disposed along the side surface. In this case, the first damping member and the second damping member can be positioned by engaging at least a part of the belt-like member with the side surface of the housing. In this case, since the first damping member and the second damping member are connected via the belt-like member, both the damping members do not fall apart. For this reason, the workability | operativity of the operation | work which fixes a fan unit to a flame | frame via a 1st damping member and a 2nd damping member improves further.

  Further, such a belt-shaped member may be made of a material that is more stretchable than the damping material that constitutes the first damping member and the second damping member. In this case, since the belt-shaped member easily expands and contracts, the distance between the first damping member and the second damping member can be easily changed. Therefore, the thickness (the distance between the end surface of the housing facing the frame in the vicinity of the screw hole and the end surface of the housing facing the head of the fixing screw in the vicinity of the screw hole) is A further effect is produced that it can be applied well to different fan units.

On the other hand, when the band-shaped member as described above is employed as the positioning means, the first vibration-damping member, the band-shaped member, and the second vibration-damping member may be integrally configured by punching a flat plate-like plate material. In this case, it is possible to easily manufacture the fan unit fixture of the present invention by punching out a flat plate material with a press or the like, and there is a further effect that the manufacturing cost can be further reduced. Even in this case, if the plate material is molded by a known method such as two-color molding, the material is superior in stretchability to the damping material constituting the first damping member and the second damping member. A strip-shaped member can be constituted.

  In addition, various other configurations can be adopted as the positioning means. For example, the positioning means is formed on at least one of the first damping member and the second damping member, and the first hole Or a convex part that protrudes from the periphery of the second hole part and fits into the screw hole. In this case, the first hole portion or the second hole portion can be satisfactorily positioned at the center of the screw hole by fitting the convex portion into the screw hole.

  Furthermore, the first hole and the second hole may have a diameter that is at least smaller than that of the screw hole, but at least one of the first hole or the second hole is not fixed to the fixing screw. In the case where the outer diameter of the thread portion is smaller than that of the outer diameter, the following further effect is produced. In this case, if the tip of the fixing screw is pushed into the first hole or the second hole, the tip of the fixing screw is picked by the first hole or the second hole, and the fixing screw does not fall. Therefore, the fixing screw can be temporarily fixed to the first hole portion or the second hole portion, and the workability of fixing the fan unit to the frame is further improved.

  Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1A is a perspective view showing a configuration of a fan unit mounting tool 10 as a first embodiment to which the present invention is applied, and FIG. 1B is a rear view thereof (that is, FIG. 1A). ) View from the back side). Moreover, FIG. 2 is explanatory drawing showing the use condition of the fan unit attachment tool 10. FIG.

  As shown in FIG. 2, four fan unit attachments 10 (only one is shown in FIG. 2) are used for one fan unit 1, and are mounted at four corners of the fan unit 1. The fan unit 1 is a well-known unit in which a cooling fan 2 (see FIG. 3) and a DC motor 3 are built in a casing 4. The casing 4 penetrates the casing 4 in the thickness direction at four corners. A screw hole 4a is provided. A fixing screw 5 (see FIG. 3) is inserted into the screw hole 4a, and further, the fixing screw 5 is inserted into a screw hole 6a (see FIG. 3) provided in the frame 6 of a personal computer or the like, and a nut (not shown). The fan unit 1 can be fixed to the frame 6 by screwing together.

  However, if the fan unit 1 is directly fixed to the frame 6 in this manner, the vibration of the fan unit 1 may be transmitted to the frame 6 when the cooling fan 2 is driven, resulting in noise. Therefore, in the present embodiment, the fan unit fixture 10 configured as follows is mounted on the four corners of the fan unit 1 and then fixed with the fixing screws 5 as described above.

  In other words, as shown in FIGS. 1A and 1B, the fan unit fixture 10 according to the present embodiment is a plate-like first damping member 11 and second damping member 12 that are substantially right-angled isosceles triangles. The pair of short sides of the vibration damping members 11 and 12 are connected by a pair of adjusting belts 13 and 13 as band-like members. The first damping member 11 has a first hole portion 11a, and the second damping member 12 has a second hole portion 12a. Further, pedestal portions 11b and 12b are provided on the inner side surfaces of the first vibration damping member 11 and the second vibration damping member 12, and the first hole portion 11a and the second hole portion 12a described above are formed on the pedestal portion 11b, It penetrates the center of 12b.

The first damping member 11 and the second damping member 12 are made of a damping material such as “Lostomer” (registered trademark No. 4476516: Japanese Patent Laid-Open No. 2001-19853), and the adjustment belts 13 and 13 are low. It is comprised by the styrene-type elastomer or styrene-type gel material of hardness. The fan unit fixture 10 is formed by two-color molding using these two kinds of materials. The pedestals 11b and 12b may be made of the same material as the first damping member 11 and the second damping member 12, but the pedestals 11b and 12b may be made of a softer material. In the latter case, when the fan unit fixture 10 is mounted, the soft pedestals 11b and 12b can be pressed against the housing 4 by the first damping member 11 and the second damping member 12.

  In the fan unit fixture 10 configured as described above, the adjustment belts 13 and 13 are more elastic than the first damping member 11 and the second damping member 12. Therefore, by appropriately extending the adjustment belts 13 and 13, as shown in FIG. 2, the first damping member 11 and the second damping member 12 are brought into contact with both end surfaces in the thickness direction of the casing 4, respectively. The fan unit fixture 10 can be attached to the four corners of the housing 4. Here, the 1st damping member 11 shall be arrange | positioned at the end surface by the side of the flame | frame 6.

  When the adjustment belts 13 and 13 are engaged with the adjacent side surfaces of the housing 4, the first hole portion 11a and the second hole portion 12a are disposed at the center of the screw hole 4a. Here, as shown in FIG. 3, the inner diameter of the first hole portion 11a = the inner diameter of the second hole portion 12a = φa, the inner diameter of the screw hole 4a = φb, the outer diameter of the screw portion 5a of the fixing screw 5 = φc, In this case, the fan unit fixture 10 of the present embodiment is designed to satisfy φa ≦ φc <φb. For this reason, the following effects arise.

  First, since φa ≦ φc, if the tip of the screw portion 5a is pushed into the second hole portion 12a, the tip of the screw portion 5a is picked by the second hole portion 12a, and the fixing screw 5 does not fall. Therefore, the fixing screw 5 can be temporarily fixed to the second hole portion 12a, and the workability of the operation of fixing the fan unit 1 to the frame 6 is improved.

  When the fixing screw 5 is tightened from this state, the first damping member 11 is sandwiched between the housing 4 and the frame 6, and the first screw 5 is fixed between the head 5 b of the fixing screw 5 and the housing 4. 2 The casing 4 is fixed to the frame 6 in a state where the damping member 12 is sandwiched. At this time, since φc <φb, the screw portion 5a of the fixing screw 5 does not contact the inner wall of the screw hole 4a.

  For this reason, it is possible to prevent the vibration of the fan unit 1 from being directly transmitted from the housing 4 of the fan unit 1 to the frame 6 by the first damping member 11. Further, the vibration can be prevented from being directly transmitted to the head portion 5b of the fixing screw 5 by the second damping member 12, and the screw portion 5a of the fixing screw 5 can be obtained by the above-described configuration where φc <φb. It is possible to suppress the direct transmission of the vibration. Therefore, in the present embodiment, it is possible to satisfactorily suppress the vibration of the fan unit 1 from being transmitted to the frame 6 and, in turn, to prevent the generation of noise.

  Further, in the present embodiment, the fan unit 1 can be fixed to the frame 6 by utilizing the screw holes 4a, so that compared with the case where the fan unit mounting tool 10 is further covered with a bracket and fixed. Equipment can be reduced in size by reducing the number of points. Furthermore, in the present embodiment, since the first damping member 11 and the second damping member 12 are connected via the adjustment belts 13 and 13, both the damping members 11 and 12 do not fall apart, and the fan The workability of the work of fixing the unit 1 to the frame 6 is further improved. In addition, since the adjustment belts 13 and 13 have elasticity as described above, the distance between the first damping member 11 and the second damping member 12 can be adjusted, and the fan unit mounting tool 10 is a fan unit having a different size. 1 can be applied well.

  Further, when the above-described two-color molding is performed, if the convex portion 12b as shown in FIG. 4 is provided on the end surface on the housing 4 side of the second damping member 12, the screw portion 5a can be further in contact with the screw hole 4a. Can be prevented. In FIG. 4, the second vibration damping member 12 is illustrated as an example, but the first vibration damping member 11 may be provided with a similar convex portion, or may be provided only on the first vibration damping member 11.

  As shown in FIG. 4, the convex portion 12b is projected and formed into a substantially spherical shape so as to protrude from the periphery of the second hole portion 12a and fit into the opening of the screw hole 4a. For this reason, the 2nd hole 12a can be positioned in the center of the screw hole 4a by fitting this convex part 12b in the screw hole 4a. Therefore, when such a convex part 12b is provided, it can prevent more favorably that the screw part 5a contacts the screw hole 4a. Furthermore, when such a convex part is provided also in the 1st damping member 11, the adjustment belts 13 and 13 may not have a function as a positioning means, or the adjustment belts 13 and 13 are abbreviate | omitted. Also good. The present invention also includes a configuration in which the first damping member 11 and the second damping member 12 are configured separately.

  Further, the adjustment belts 13 and 13 may be formed thin as shown in FIG. 5, and in this case, the stretchability of the adjustment belts 13 and 13 can be further improved. When the adjustment belts 13 and 13 are formed in such a thin wall, the adjustment belts 13 and 13 may be made of the same material as the first damping member 11 and the second damping member 12.

  Furthermore, the adjustment belts 13 and 13 may be formed in a bellows shape as shown in FIG. 6, and in this case, the stretchability of the adjustment belts 13 and 13 can be further improved. Even when the adjusting belts 13 and 13 are formed in a bellows shape as described above, the adjusting belts 13 and 13 can be made of the same material as the first damping member 11 and the second damping member 12.

  Furthermore, it is also conceivable to suppress deformation of the first damping member 11 and the second damping member 12 by urging stress concentration on the adjustment belts 13 and 13. As a method for promoting the stress concentration, for example, as shown in FIG. 7, a method of making a notch 13 a from the edge direction of the base portion of the adjustment belt 13, 13, or an adjustment belt 13, 13 as shown in FIG. 8. A method of making a cut 13b in the thickness direction at the base portion of can be considered.

  5-8, the pedestal portions 11b, 12b are omitted, but in the embodiments shown in FIGS. 1-8, the pedestal portions 11b, 12b may actually be omitted. The portions 11b and 12b may be provided.

  Next, a second embodiment of the present invention will be described. As shown in FIG. 9, the fan unit fixture 20 of the present embodiment punches a flat plate material 200 made of the same damping material as that of the first damping member 11 and the second damping member 12 as shown in FIG. It is constituted integrally.

  As shown in FIG. 9, the fan unit mounting tool 20 of the present embodiment, like the fan unit mounting tool 10, includes a plate-shaped first damping member 21 and second damping member 22 that are substantially right-angled isosceles triangles. And one short side of each of the vibration damping members 21 and 22 is connected by a belt-like member 23. Similarly to the fan unit fixture 10, the first damping member 21 and the second damping member 22 are provided with a first hole portion 21a and a second hole portion 22a.

The fan unit fixture 20 configured as described above uses a pair of left and right symmetrical fan unit fixtures 20 as a set, and is mounted on the fan unit 1 as follows. That is, as shown in FIG. 10, the second damping members 22, 22 are placed on the end surface of the housing 4 on the side where the fixing screws 5 are inserted, and the belt-like members 23, 23 are placed on the second damping member. After being bent at the base with respect to the members 22, 22, the first damping members 21, 21 are overlapped and used on the frame 6 (see FIG. 3) side end surface of the housing 4. In this case, the band-shaped member 23 is bent along the ridge of the casing 4 or the ridge of the second damping member 22 or the first damping member 21 disposed immediately above the casing 4, thereby The hole 22a or the first hole 21a can be disposed at the center of the screw hole 4a. Then, the same effect is produced by fixing to the frame 6 with the fixing screw 5 as in the first embodiment.

  Moreover, in this Embodiment, since it can manufacture by stamping the board | plate material 200 with a press etc., manufacturing cost can be reduced further more favorably. The plate member 200 may be manufactured by two-color molding. In this case, the stretchability of the band-shaped member 23 can be improved as compared with the first damping member 21 and the second damping member 22.

  Further, when the fan unit fixture 20 is manufactured by punching the plate material 200 in this manner, the following convex portion 22b can be formed to obtain the same effect as the convex portion 12b described in FIG. It is. That is, when the second hole portion 22a is formed by punching with a press, the edge of the second hole portion 22a can be projected in the punching direction to form a convex portion 22b as shown in FIG. Also in this case, the second hole 22a can be positioned at the center of the screw hole 4a by fitting the protrusion 22b into the opening of the screw hole 4a. In addition, when forming a convex part in this way, in order to form the same convex part in both the 1st hole part 21a and the 2nd hole part 22a, the 1st hole part 21a and the 2nd hole part 22a are used. Are punched from opposite directions with respect to the paper surface of FIG.

  In the example of FIG. 10, one second vibration damping member 22, the other second vibration damping member 22, the housing 4, one first vibration damping member 21, and the other first vibration damping member 21 from the upper side of the drawing. However, as shown in FIG. 12, one second damping member 22, the other second damping member 22, the housing 4, the other first damping member 21, You may arrange | position in order of the 1st damping member 21. FIG. Further, when the belt-like member 23 does not necessarily have to be disposed on each side surface of the housing 4, one fan unit mounting tool 20 may be used at each of the four corners of the housing 4.

  Furthermore, as shown in FIG. 13, the perpendicular | vertical vertex of the 1st damping part 21 and the 2nd damping part 22 may be made to oppose, and the strip | belt-shaped member 23 may be provided between the vertexes. In this case, as shown in FIG. 14, the fan unit fixture 20 can be mounted by disposing the belt-like members 23 along the ridge lines at the four corners of the housing 4. Also in this case, the operation and effect substantially similar to those of the above embodiments are produced.

  Although the present invention has been described with reference to specific embodiments, the adjustment belt 13, the convex portion 12b, the belt-like member 23, or the convex portion 22b corresponds to the positioning means in each of the above embodiments. Further, the present invention is not limited to the above-described embodiment, and can be implemented in various forms without departing from the gist of the present invention.

  For example, as the damping material constituting the first damping member 11, 21 and the second damping member 12, 22, olefin-based, urethane-based, polyester-based, etc., in addition to styrene elastomers such as the aforementioned “lostomer” Various materials such as injection-moldable thermoplastic elastomer or vulcanized rubber can be used. However, in order to obtain a good vibration / noise prevention effect, it is desirable to use a JISA hardness of 90 or less.

Further, the adjusting belt 13 or the belt-like member 23 may not have a function as a positioning means, and by tightening the fixing screw 5, the first hole portions 11a and 21a and the second hole portions 12a and 22a are centered on the screw hole 4a. May be positioned. In this case, the housing 4 side end surfaces of the first damping members 11 and 21 and the second damping members 12 and 22 correspond to positioning means. That is, the positioning means is not limited to those using the engagement with the housing 4 such as the adjustment belt 13 and the belt-like member 23 described above, and various forms are conceivable. The first holes 11 a and 21 a and the second holes 12 a and 22 a do not have to be completely aligned with the center of the screw hole 4 a, and the inner wall of the screw hole 4 a is fixed even when the fixing screw 5 drives the cooling fan 2. Positioning may be performed so that it does not contact the surface.

  Furthermore, various shapes can be adopted as the first damping members 11, 21 and the second damping members 12, 22, and they may not be connected by the adjustment belt 13 or the belt-like member 23. Furthermore, the first damping members 11 and 21 and the second damping members 12 and 22 may be formed integrally with the housing 4 in advance. Further, the screw holes of the fan unit are not limited to being provided at the four corners as described above, and various cases such as three points and six points are assumed.

  FIGS. 15A and 15B are perspective views illustrating the fan unit mounting tool 30 that is formed integrally with the housing 4 in advance. As shown in FIG. 15A, when the housing 4 is composed of two mounting plates 41 and 42 arranged in parallel along the rotation axis of the DC motor 3, the mounting plate 41 on the frame 6 side The fan unit fixture 30 may be configured by integrally molding the first damping member 31 at the four corners and the second damping member 32 at the four corners of the mounting plate 42.

  Further, as shown in FIG. 15B, when the housing 4 is configured in a rectangular parallelepiped shape, the four first damping members 31 are attached to each corner of the housing 4 on the frame 6 side. The fan unit mounting tool 30 may be configured by integrally molding the four second damping members 32 at the corners. 15A and 15B, the first hole portion is represented by 31a and the second hole portion is represented by 32a, respectively, as in the above embodiments.

It is the perspective view and back view showing the structure of the fan unit attachment tool as 1st Embodiment. It is a perspective view showing the use condition of the fan unit fixture. It is explanatory drawing showing the relationship of the diameter of the hole of the fan unit attachment tool. It is sectional drawing showing the structure of the modification which provided the convex part in the fan unit fixture. It is a perspective view showing the structure of the modification regarding the adjustment belt of the said fan unit fixture. It is a perspective view showing the structure of the other modification regarding the adjustment belt of the said fan unit fixture. It is a perspective view showing the structure of the further another modification regarding the adjustment belt of the said fan unit fixture. It is a perspective view showing the structure of the further another modification regarding the adjustment belt of the said fan unit fixture. It is a top view showing the structure of the fan unit attachment tool as 2nd Embodiment. It is explanatory drawing showing the use condition of the fan unit fixture. It is sectional drawing showing the structure of the modification which provided the convex part in the fan unit fixture. It is a perspective view showing the other use condition of the said fan unit fixture. It is a top view showing the structure of the modification of the said fan unit fixture. It is a perspective view showing the use condition of the modification. It is a perspective view which illustrates the fan unit attachment tool shape | molded integrally with the housing | casing.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Fan unit 2 ... Cooling fan 3 ... DC motor 4 ... Housing 4a ... Screw hole 5 ... Fixing screw 5a ... Screw part 5b ... Head 6 ... Frame 6a ... Screw hole 10, 20 ... Fan unit fixture 11 , 21, 31 ... first damping member 11a, 21a, 31a ... first hole 12, 22, 32 ... second damping member 12a, 22a, 32a ... second hole 12b, 22b ... convex 13 ... adjust Belts 13a, 13b ... notches 23 ... strip-shaped member 200 ... plate material

Claims (6)

A fan unit mounting tool for fixing a DC motor and a cooling fan in a housing, and fixing a fan unit having a fixing screw hole around the housing to a frame,
A first damping member that is disposed between the frame and the end surface of the housing that faces the frame in the vicinity of the screw hole, and is made of a damping material;
A first hole formed in the first damping member, into which a fixing screw to be inserted into the screw hole can be inserted, and having a smaller diameter than the screw hole;
A second damping member that is disposed between an end surface of the housing facing the head of the fixing screw in the vicinity of the screw hole and the head, and is made of a damping material;
A second hole formed in the second damping member, into which the fixing screw can be inserted, and having a smaller diameter than the screw hole;
Positioning means for positioning the first damping member and the second damping member so that the first hole portion and the second hole portion are disposed at the center of the screw hole;
A fan unit mounting tool characterized by comprising: 2. The fan according to claim 1, wherein the positioning means is a belt-like member that connects the first damping member and the second damping member and can be disposed along a side surface of the casing. Unit fixture. 3. The fan unit fixture according to claim 2, wherein the belt-like member is made of a material that is more elastic than the damping material that constitutes the first damping member and the second damping member. . 4. The fan unit fixture according to claim 2, wherein the first damping member, the belt-like member, and the second damping member are integrally formed by punching a flat plate material. The positioning means is formed on at least one of the first damping member and the second damping member, and protrudes from the periphery of the first hole or the second hole to fit into the screw hole. It is a convex part, The fan unit attachment tool in any one of Claims 1-4 characterized by the above-mentioned. The at least any one of the said 1st hole part or the said 2nd hole part was comprised by the small diameter rather than the outer diameter of the thread part of the said fixing screw. Fan unit fixture.