JP2014016051A - Air fan - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air fan such that a projection of a component fitted to a flange back can be easily inserted into an engagement hole of a raised part of a flange and entry of dust can be suppressed.SOLUTION: An air fan includes: a cylindrical air channel 3a which has both ends opened; a flange part 19 which protrudes radially from an outer periphery of a front-side opening of the air channel 3a; a terminal base 30 arranged on a back-side surface of the flange part 19 and having a shaft-like support part 31 projecting outward; a raised part 20 having an engagement hole 21a that the shaft-like support part 31 can engage, and raised from an outer periphery of the flange part 19 toward a back side; and a pair of component assembly guide ribs 21b extending on an inner surface of the raised part 20 from both sides of the engagement hole 21a toward ends of the raised part 20.

Description

  The present invention relates to a ventilation fan.

  There is one in which protrusions for hooking are provided on both sides of a side surface of a component (for example, a protective case for a terminal block) attached to the rear surface of the flange of the ventilation fan (for example, Patent Document 1). In the ventilation fan of patent document 1, the protrusion which goes to a ventilation fan main body inside is attached to the support nail | claw provided in the flange back surface, and the protrusion which goes outside a ventilation fan main body is inserted in the engagement hole provided in the standing part of the flange. The parts are attached to the back of the flange without being screwed.

JP 2006-250434 A ([0012], FIG. 4, FIG. 6)

  In the ventilation fan of Patent Document 1, when assembling a part to be attached to the rear surface of the flange, out of the hooking protrusions provided on both side surfaces of the part, the protrusion toward the inside of the ventilation fan body is attached to the support claw provided on the rear face of the flange. Then, the protrusion toward the outside of the ventilation fan body is inserted into the engagement hole formed in the rising portion of the flange. However, there is a problem that it is difficult to assemble because the protrusions toward the outside of the ventilation fan main body are difficult to enter the engagement holes formed in the rising portion of the flange. Further, there is a problem that dust or the like may enter the rear surface of the flange from the engagement hole.

  The present invention has been made to solve the above-described problems, and can easily insert a protrusion of a component attached to the rear surface of the flange into the engagement hole of the rising portion of the flange, so that dust can enter. It aims at providing the ventilation fan which can suppress.

  The ventilating fan according to the present invention is disposed on a cylindrical wind tunnel whose both ends are open, a flange portion projecting radially from the outer periphery of the front side opening of the wind tunnel, and a rear side surface of the flange portion, and outwardly. A component having a protruding first protrusion, an engagement hole into which the first protrusion can be fitted, a rising portion rising from the outer periphery of the flange portion toward the back side, and an inner surface of the rising portion, A pair of guide ribs extending from both sides of the engagement hole toward the end surface of the rising portion.

  According to the present invention, since the pair of guide ribs extending from both sides of the engaging hole toward the end surface of the rising part are provided on the inner surface of the rising part, the first protrusion is inserted into the engaging hole. The occurrence of misalignment is suppressed, and attachment of components to the back surface of the flange portion is facilitated. Further, according to the present invention, since the rising portion has the engagement hole into which the first protrusion can be fitted, the intrusion of dust into the ventilation fan is suppressed.

It is a longitudinal cross-sectional view which shows the state with which the ventilation fan which concerns on Embodiment 1 of this invention was attached to the pipe. It is a back perspective view of the ventilation fan which concerns on Embodiment 1 of this invention. It is the perspective view which looked at the attachment of the terminal block to the ventilation fan which concerns on Embodiment 1 of this invention from the outer side of the ventilation fan. It is the perspective view which looked at the attachment of the terminal block to the ventilation fan which concerns on Embodiment 1 of this invention from the inner side of the ventilation fan. It is the perspective view which looked at attachment of the lower case to the ventilation fan which concerns on Embodiment 1 of this invention from the outer side of the ventilation fan. It is the perspective view which looked at attachment of the lower case to the ventilation fan which concerns on Embodiment 1 of this invention from the inner side of the ventilation fan. It is a side view which shows the state by which the lower case was attached to the ventilation fan which concerns on Embodiment 1 of this invention. It is AA sectional drawing of FIG. It is the elements on larger scale of FIG. It is a perspective view which shows the state which looked at the ventilation fan which concerns on Embodiment 1 of this invention from the outer side. It is a longitudinal cross-sectional view which shows the state by which the lower case was attached to the ventilation fan which concerns on Embodiment 1 of this invention.

  FIG. 1 is a longitudinal sectional view showing a state in which a ventilation fan 100 according to Embodiment 1 of the present invention is attached to a pipe 1. FIG. 2 is a rear perspective view of the ventilation fan 100 according to Embodiment 1 of the present invention. Hereinafter, the indoor side (left side in FIG. 1) of the ventilation fan 100 may be referred to as a front surface or a front surface, and the outdoor side (right side of the paper surface in FIG. 1) of the ventilation fan 100 may be referred to as a rear surface or back surface.

  As shown in FIGS. 1 and 2, the ventilation fan 100 includes a main body 6 and a decorative grill 7, and is inserted and installed from the indoor side into, for example, a pipe 1 or a duct that communicates indoors and outdoors. The main body 6 includes a resin main body frame 3, a blower 4, and a motor mounting structure 11.

  The main body frame 3 includes a cylindrical wind tunnel 3a inserted into the pipe 1 or the like. The main body frame 3 is integrally formed with a front structure at the mouth edge portion of the bell mouth-shaped opening 8 serving as a suction port at the front of the wind tunnel 3a. The front structure includes a substantially square (or round) flange portion 19 projecting in the radial direction on the outer periphery of the indoor opening of the wind tunnel 3a, and a rising portion that rises from the peripheral edge of the flange portion 19 toward the back side. 20. The rising portion 20 has a rising portion end surface 20a, and the rising portion end surface 20a abuts against a wall surface on the indoor side.

  The blower 4 includes an impeller 4a, an electric motor 4b, and a rotating shaft 4c, and is attached to the main body frame 3. The impeller 4a is of a propeller type, for example, and rotates when the rotating shaft 4c is rotated. The blower 4 is attached to an electric motor attachment structure 11 provided on the outdoor side of the wind tunnel 3 a of the main body frame 3. The rotating shaft 4c extends on a center line in the wind tunnel 3a of the electric motor 4b, is fitted with an impeller 4a, and is included in the wind tunnel 3a.

  The motor mounting structure 11 includes four leg portions 11a, a bridging portion 11b, a motor cover 11c, and a leaf spring 11d. The four legs 11a extend rearward along the center line direction of the wind tunnel 3a at intervals in the circumferential direction, and are all provided inside the outer periphery of the wind tunnel 3a. The bridging portion 11b extends radially inward from the end portion of each leg portion 11a. The motor cover 11c is screwed and fixed at the inner end of the main body frame 3 of the bridge portion 11b, so that the motor cover 11c is supported at the center of the wind tunnel 3a. 4c is projected. The leaf spring 11d is a spring with a warp, and is provided on the outer side of one of the four legs 11a, and holds the main body 6 in the pipe 1 or in the duct by a radially expanding elastic force.

  The decorative grille 7 has an inner structure that covers the flange portion 19 and the rising portion 20 that are the front structure of the main body frame 3, and is attached to the main body 6 by claw fitting.

  An electrical connection component such as a closed end connector is accommodated on the back side of the flange portion 19. In the first embodiment, as shown in FIG. 2, contact with the switch conductor portion and the lead wire connection portion is performed. Wiring part protective cover 17 for prevention, power on / off switch 18 whose operation part for switching power on / off is exposed from the outer wall of the ventilating fan 100, and an external power cable can be easily connected with a rotary structure The terminal block 30 and the lower case 40 that stores the terminal block 30 by rotating the terminal block 30 are provided. The connection part protective cover 17 has a retaining rib 17a that protrudes toward the flange part 19 during use (FIG. 8 to be described later). The terminal block 30 includes a power line connection terminal 30a, is connected to and electrically connected to the electric motor 4b, and is accommodated in one corner of the recess 19a formed on the back surface of the flange portion 19.

  FIG. 3 is a perspective view of attachment of the terminal block to the ventilation fan 100 according to Embodiment 1 of the present invention as viewed from the outside of the ventilation fan 100. FIG. 4 is a perspective view of attachment of the terminal block 30 to the ventilation fan 100 according to Embodiment 1 of the present invention as viewed from the inside of the ventilation fan 100.

  As shown in FIG. 3, an engagement hole 21 a is formed in the rising portion 20, and the terminal block 30 is provided with a cylindrical shaft-shaped support portion 31 that protrudes outward from the outer peripheral surface of the terminal block 30. The shaft-shaped support portion 31 is inserted into the engagement hole 21a. The engagement hole 21a is formed on the back surface side of the flange portion 19 by a predetermined distance from the front surface portion of the flange portion 19 and has a size that allows the shaft-like support portion 31 to be fitted therein, thereby preventing entry of dust and the like as much as possible. It has a structure.

  As shown in FIG. 4, the stepped shape 20 b is located on the flange rising portion 20 below the engagement hole 21 a so as to be located on the inner side of the ventilation fan 100 with respect to the flange rising portion 20 above the engagement hole 21 a. Is formed.

  As shown in FIG. 4, on the inner surface side of the rising portion 20, a pair of component assembly guide ribs 21b protruding from the surface of the rising portion 20 are provided from both sides of the engagement hole 21a toward the rising portion end surface 20a. ing. The pair of component assembly guide ribs 21b are separated by the same distance as the diameter of the shaft-shaped support portion 31. Thus, since a pair of component assembly guide ribs 21b is provided, when the terminal block 30 is attached to the flange portion 19, the shaft-like support portion 31 passes between the two component assembly guide ribs 21b. Therefore, the shaft-shaped support portion 31 is suppressed from being shifted to the left and right and inserted toward the engagement hole 21a, and the terminal block 30 can be easily assembled.

  As shown in FIG. 4, an arc-shaped support claw 22 a is provided on the back surface of the flange portion 19, and the terminal block 30 has a terminal block on the surface opposite to the surface on which the shaft-shaped support portion 31 is provided. A cylindrical cylindrical support portion 32 projecting outward from the outer peripheral surface of 30 is provided, and the cylindrical support portion 32 is fitted into the support claw 22a.

  As described above, the terminal block 30 is pivotally supported with respect to the main body frame 3 by the cylindrical shaft-shaped support portion 31 and the cylindrical cylindrical support portion 32. When the connection work is performed, the terminal block 30 is in an upright state, and when the connection work is completed, the terminal block 30 is set in a lying state.

  FIG. 5 is a perspective view of attachment of the lower case 40 to the ventilation fan 100 according to Embodiment 1 of the present invention as viewed from the outside of the ventilation fan 100. FIG. 6 is a perspective view of the attachment of the lower case 40 to the ventilation fan 100 according to Embodiment 1 of the present invention as viewed from the inside of the ventilation fan 100. FIG. 7 is a side view showing a state where the lower case 40 is attached to the ventilation fan 100 according to Embodiment 1 of the present invention. FIG. 8 is a cross-sectional view taken along the line AA of FIG. FIG. 9 is a partially enlarged view of FIG.

  As described above, the terminal block 30 includes the shaft-like support portion 31 and the cylindrical support portion 32 that are cylindrical shafts, so that the terminal block 30 can be rotated to facilitate connection work. On the other hand, for parts that do not need to be rotatable, such as the lower case 40 that protects the terminal block 30, as described below, for example, a flat plate that protrudes outward from the outer peripheral surface of the lower case 40. It attaches to the main body frame 3 through the protrusions 43a and 44a.

  As shown in FIGS. 5 and 6, an engagement hole 23 a is formed in the rising portion 20, a protrusion 43 a is provided in the lower case 40, and the protrusion 43 a is inserted into the engagement hole 23 a. Yes. The positional relationship between the engagement hole 23a and the protrusion 43a when the protrusion 43a is inserted into the engagement hole 23a is as shown in FIGS.

  As shown in FIG. 6, the stepped shape 20 c is formed such that the flange rising portion 20 below the engagement hole 23 a is located on the inner side of the ventilation fan 100 with respect to the flange rising portion 20 above the engagement hole 23 a. Is formed.

  As shown in FIG. 6, on the inner surface side of the rising portion 20, a pair of component assembly guide ribs 23b protruding from the surface of the rising portion 20 are provided from both sides of the engagement hole 23a toward the rising portion end surface 20a. ing. The pair of component assembly guide ribs 23b are separated by a distance that is substantially the same as the width of the protrusion 43a. Thus, since a pair of component assembly guide ribs 23b is provided, when the lower case 40 is attached to the flange portion 19, the protrusion 43a passes between the two component assembly guide ribs 23b. Therefore, the protrusion 43a is suppressed from being shifted to the left and right, and is inserted toward the engagement hole 23a, so that the lower case 40 can be easily assembled.

  As shown in FIG. 9, between the pair of component assembly guide ribs 23 b on the inner surface of the rising portion 20, the inner surface of the flange portion 19 is inclined from the rising portion end surface 20 a toward the proximal end portion of the rising portion 20. An inclined surface 23c is formed. For this reason, the inner width in the rising portion 20 is narrowed from the rising portion end surface 20a toward the engagement hole 23a. Therefore, when the protrusion 43a of the lower case 40 is inserted into the engagement hole 23a, the protrusion 43a can be easily inserted into the engagement hole 23a by pushing the protrusion 43a along the inclined surface 23c.

  As shown in FIGS. 5 and 6, a concave fixed shape 24 a is formed on the back surface of the flange portion 19, a protrusion 44 a is provided on the lower case 40, and the protrusion 44 a is inserted into the fixed shape 24 a. It has become. The positional relationship between the fixed shape 24a and the protrusion 44a when the protrusion 44a is inserted into the fixed shape 24a is as shown in FIG.

  As shown in FIG. 8, the protrusions 43a and 44a have corner portions 43b and 44b having an R shape at the tip portions. With this configuration, it becomes easier to insert the protrusion 43a into the engagement hole 23a and to insert the protrusion 44a into the fixed shape 24a. In addition, the corner | angular part shape 43b and 44b may not be R shape, and a chamfering shape may be sufficient as it.

  As shown in FIG. 9, a hooking surface 23d is formed so that the upper surface of the engagement hole 23a is substantially horizontal, and a hooking surface 43c is formed so that the upper surface of the protrusion 43a is substantially horizontal. The hooking surface 43c is substantially parallel to the hooking surface 43c. For this reason, cancellation | release of the engagement state of the engagement hole 23a and the protrusion 43a is suppressed.

  In this way, the cylindrical support portion 32 of the terminal block 30 and the protrusion 44a of the lower case 40 can be inserted without applying an insertion load to the locations where the drop-in shapes such as the support claws 22a and the fixed shape 24a are provided. It becomes. In a state where the cylindrical support portion 32 is fitted into the support claw 22a and the projection 44a is fitted into the fixed shape 24a, the upper portion of the projection 44a is covered with the connection portion protection cover 17 as shown in FIG. The retaining rib 17a is located on the upper portion of 44a. Although not shown, when the upper portion of the projection 44 a is covered with the connection portion protection cover 17, the upper portion of the cylindrical support portion 32 is similarly covered with the connection portion protection cover 17, and is formed on the upper portion of the cylindrical support portion 32. The retaining rib 17a is located. Thus, the connection part protection cover 17 functions as a retaining member for the cylindrical support part 32 and the protrusion 44a (FIG. 2). Note that the connection portion protection cover 17 is given as an example of a cover that covers the upper portions of the cylindrical support portion 32 and the protrusion 44a, and is not limited thereto, and a member that functions as a retaining member can be appropriately employed.

The parts assembly guide ribs 21b and 23b correspond to the guide ribs in the present invention.
Further, the shaft-like support portion 31 and the protrusion 43a correspond to the first protrusion in the present invention.
The cylindrical support portion 32 and the protrusion 44a correspond to the second protrusion in the present invention.
The lower case 40 corresponds to the case in the present invention.
The hook support claw 22b and the hook fixing shape 24b correspond to the fitting portion in the present invention.

  As described above, in the ventilation fan 100 according to the first embodiment, the engagement hole 21a into which the shaft-like support portion 31 is inserted is formed, and the engagement hole 23a into which the protrusion 43a is inserted is formed in the rising portion 20. It is the composition which becomes. For this reason, components such as the terminal block 30 and the lower case 40 can be attached to the back surface of the flange portion 19 without using tools such as screws. Therefore, even if the space to store is the narrow ventilation fan 100, the narrow space can be utilized to the maximum.

  Further, in the ventilation fan 100 according to the first embodiment, the engagement hole 21a is formed with a size that allows the shaft-like support portion 31 to be fitted, and the engagement hole 23a has a size that allows the projection 43a to be fitted. Therefore, intrusion of dust into the ventilation fan 100 is suppressed.

  Further, the ventilation fan 100 according to the first embodiment includes a pair of component assembly guide ribs 21b and 23b which are provided from both sides of the engagement holes 21a and 23a toward the rising portion end surface 20a and project from the surface of the rising portion 20. Is provided. For this reason, when the shaft-like support portion 31 is inserted into the engagement hole 21a or when the protrusion 43a is inserted into the engagement hole 23a, the occurrence of misalignment is suppressed, and the terminal block 30 on the back surface of the flange portion 19 is suppressed. Is easy to install.

  Further, in the ventilation fan 100 according to the first embodiment, the flange rising portion 20 below the engagement hole 21a is positioned closer to the inside of the ventilation fan 100 than the flange rising portion 20 above the engagement hole 21a. A step shape is formed. Moreover, the stepped shape is formed so that the flange rising part 20 in the lower part of the engagement hole 23a is located on the inner side of the ventilation fan 100 with respect to the flange rising part 20 in the upper part of the engagement hole 23a. For this reason, it can shape | mold, without providing a slide mechanism etc. with a metal mold | die.

  The ventilation fan 100 according to the first embodiment is provided between the pair of component assembly guide ribs 23b, and the inclined surface 23c so that the inner width gradually decreases from the rising portion 20 toward the back surface of the flange portion 19. Is formed. For this reason, the protrusion 43a can be easily inserted into the engagement hole 23a.

  In the ventilation fan 100 according to the first embodiment, the cylindrical support portion 32 is fitted into the support claw 22a, the projection 44a is fitted into the fixed shape 24a, and the cylindrical support portion 32 and the projection 44a are connected to the connection portion protective cover 17. It is the structure covered with. For this reason, the connection part protective cover 17 functions as a terminal block 30 and a lower case 40 to prevent them from coming off.

In the first embodiment, it has been described that the connection portion protection cover 17 is used to prevent the cylindrical support portion 32 and the protrusion 44a from coming off. However, the present invention is not limited to this.
For example, as shown in FIG. 10, instead of the support claw 22 a of the rising portion 20, a hook support claw 22 b provided so as to surround a range larger than a half circumference of the outer periphery of the cylindrical support portion 32 is provided. You may comprise so that the cylindrical support part 32 may be engage | inserted by 22b. If comprised in this way, the hook support nail | claw 22b functions as a removal prevention of the cylindrical support part 32 of the terminal block 30. FIG.
Further, as shown in FIGS. 10 and 11, when the projection 44a is fitted on the upper portion of the fixed shape 24a provided on the flange portion 19 above the bottom surface in parallel with the bottom surface of the fixed shape 24a. A hook fixing shape 24b that contacts the upper surface of the protrusion 44a may be provided. If comprised in this way, the hook fixing shape 24b functions as a retaining of the lower case 40.
Further, as shown in FIG. 11, the hooking surface 24d is formed so that the lower surface of the hook fixing shape 24b is substantially horizontal, and the hooking surface 44c is formed so that the upper surface of the protrusion 44a is substantially horizontal. You may comprise so that 24d and the hooking surface 44c may become substantially parallel. If comprised in this way, the hooking surfaces 24d and 44c will function as retaining of the lower case 40.
Further, as shown in FIG. 11, it may be configured such that the insertion-side surface of the hook fixing shape 24b is formed into a chamfered shape 24c. With this configuration, the protrusion 44a can be easily inserted into the fixed shape 24a.

  Needless to say, the mounting structure for attaching components such as the terminal block and the lower case described in the embodiment to the ventilation fan can also be used for a blower, an air conditioner, and a system member related thereto.

  DESCRIPTION OF SYMBOLS 1 Pipe, 3 Main body frame, 3a Wind tunnel, 4 Blower, 4a Impeller, 4b Electric motor, 4c Rotating shaft, 6 Main body, 7 Cosmetic grill, 8 Opening part, 11 Electric motor mounting structure, 11a Leg part, 11b Bridge part, 11c Motor cover, 11d leaf spring, 17 connection part protective cover, 17a retaining rib, 18 power on / off switch, 19 flange part, 19a recessed part, 20 rising part, 20a rising part end face, 20b, 20c stepped shape, 21a engagement Hole, 21b component assembly guide rib, 22a support claw, 22b hook support claw, 23a engagement hole, 23b component assembly guide rib, 23c inclined surface, 23d hook surface, 24a fixed shape, 24b hook fixed shape, 24c chamfered shape, 24d Hook surface, 30 terminal block, 30a power line connection terminal, 31 shaft support, 32 cylindrical Sandwiching member, 40 lower case, 43a projection, 43b corner shape, 43c hooking surface, 44a projection, 44b corner shape, 44c hooking surface, 100 ventilators.

Claims (11)

A cylindrical wind tunnel open at both ends;
A flange portion that projects radially from the outer periphery of the front side opening of the wind tunnel;
A component having a first protrusion disposed on the rear surface of the flange portion and protruding outward;
A rising portion that has an engagement hole into which the first protrusion can be fitted, and rises from the outer periphery of the flange portion toward the back surface;
A ventilation fan comprising a pair of guide ribs extending from both sides of the engagement hole toward an end surface of the rising portion on an inner surface of the rising portion. The stepped shape is formed so that the rising portion below the engagement hole is located on the back inner side of the flange portion with respect to the rising portion above the engagement hole. Item 1. The ventilation fan according to Item 1. Between the pair of guide ribs in the surface of the rising portion,
The ventilation fan according to claim 1 or 2, wherein an inclined surface that is inclined toward an inner side of the flange portion from an end surface of the rising portion toward a proximal end portion of the rising portion is formed. A second protrusion provided on a surface opposite to the surface of the component on which the first protrusion is provided, and protruding outward.
The ventilation fan according to any one of claims 1 to 3, further comprising: a fitting portion that is provided on a back surface of the flange portion and into which the second protrusion is fitted. The first protrusion is a cylindrical shaft-shaped support portion;
The second protrusion is a cylindrical cylindrical support portion;
The component is a terminal block that is pivotally supported and accommodated on the back surface of the flange portion,
The ventilation fan according to claim 4, wherein the fitting portion is an arc-shaped support claw provided on a back surface of the flange portion. The first protrusion and the second protrusion are flat protrusions,
The component is a case housed on the back surface of the flange portion,
The ventilation fan according to claim 4, wherein the fitting portion has a concave fixed shape provided on a back surface of the flange portion. In a state where the parts are fixed to the back surface of the flange portion,
The ventilation fan according to any one of claims 4 to 6, wherein the second protrusion is covered so that upward movement is restricted. The ventilation fan according to claim 7, wherein an upper portion of the second protrusion is covered with a connection portion protective cover. The fitting portion is
The ventilating fan according to claim 5, wherein the ventilation fan is an arc-shaped hook support claw provided on a back surface of the flange portion and surrounding a range larger than a half circumference of an outer periphery of the cylindrical support portion. The fitting portion is
The hook fixing shape provided in parallel with the bottom face of the fixed shape and above the bottom face and contacting the top surface of the second protrusion when the second protrusion is fitted is provided. Ventilation fan. The ventilating fan according to claim 6 or 10, wherein a tip portion of at least one of the first protrusion and the second protrusion has an R shape or a chamfered shape.

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