JPH109189A - Manufacture of horizontal fan - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate the assembling work of a horizontal fan and thus improve the mass-productivity thereof by arranging side plates and ring plates both formed with a plurality of radial fitting holes along their outer peripheries such that the fitting holes of the side plates and the ring plates are circumferentially shifted successively along one side plate through the other side plate. SOLUTION: In order to assemble a horizontal fan, a side plate 12 is fitted through its fitting hole 14 on a shaft core jig 21 from one-end side thereof with a notch in its inside diameter part engaging with a helical guide projection 22 formed on the shaft core jig 21. A ring plate 13 is fitted through its fitting hole 14 on the shaft core jig 21 from the same end side, which process is repeated by the number of plate rings used. A side plate 11 is inserted at its fitting part 11A into a fitting hole 21A of the shaft core jig 21 and is held by the shaft core jig 21 at the end thereof through positioning. A blade is then inserted into the fitting hole 14 of the side plate 12 and successively into the fitting holes 14 of the ring plates 13 and of the side plate 11, and is ultrasonically welded thereto.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a cross flow fan for use in an air conditioner or the like, which has improved assemblability and improved mass productivity.

[0002]

2. Description of the Related Art A cross flow fan conventionally used for a blower or the like is disclosed in Japanese Patent Application Laid-Open No. 8-49690 (F04D 17/04).
Is shown in That is, a method of assembling a cross flow fan by assembling a plurality of cross flow fan divided members 102 vertically as shown in FIG. 11 by ultrasonic welding or bonding is known. The cross flow fan divided body 102 is composed of a disk-shaped side plate 103 and a plurality of blades 104... The plurality of blades 104 are provided at predetermined intervals along the outer periphery of the side plate 103. I have.

A plurality of blades 104 provided on the transverse fan divided body 102 are provided with a predetermined twist in the same direction, and the plurality of blades 104 are joined together by ultrasonic welding. The cross flow fan 100 is assembled. In such a case, the plurality of blades 104 provided on each of the cross flow fan divided bodies 102 are the blades 1 provided on one cross flow fan divided body 102.
04... Are joined to the side plate 103.

That is, the blades 104... Of the respective crossflow fan divided bodies 102... Are provided on the extension of the respective blades 104. A plurality of long blades 104 twisted from one end to the other end of 100 are formed. The cross flow fan 100 is provided with a plurality of twisted blades 104 at predetermined intervals to improve the performance of the cross flow fan such as an increase in the amount of blown air and a reduction in noise.

[0005]

However, if the cross flow fan divided bodies are joined together, the blades provided from one end to the other end of the cross flow fan are not joined in a straight line, and a step is inevitably formed. For this reason, there has been a problem that not only the external appearance is deteriorated, but also the rotation noise of the cross flow fan is adversely affected.

A molding die and an assembling jig for a cross flow fan divided body are used for assembling a plurality of cross flow fan divided bodies, changing the interval between blades provided on side plates, changing the size of blades, and the like. Had to be rebuilt. For this reason, there is a problem in that when changing to a blade having a different spacing or a different size, the cost is significantly increased.

SUMMARY OF THE INVENTION The present invention has been made to solve the problems of the prior art, and improves the productivity and,
It is an object of the present invention to provide a method of manufacturing a cross flow fan capable of reducing noise during operation.

[0008]

That is, a method of manufacturing a cross flow fan according to the first aspect of the present invention comprises a disk-shaped or annular side plate provided on both sides, a distance between the side plates, A method of manufacturing a cross flow fan comprising: a plurality of ring plates provided concentrically with a plate; and a plurality of blades attached along the outer periphery of these side plates and the ring plate along the longitudinal direction thereof. A plurality of radial fitting holes are formed along the outer periphery of both side plates and each ring plate, and the fitting holes of each side plate and the ring plate are sequentially shifted in the circumferential direction from one side plate to the other side plate. While being arranged in a state, the blade has a predetermined twist shape, passes through the fitting hole of each ring plate from the fitting hole of one side plate, and is inserted and fixed to the fitting hole of the other side plate. is there.

According to a second aspect of the present invention, in addition to the first aspect, a shaft core jig having a spiral guide projection formed on a surface thereof is prepared, and is provided on an inner diameter portion of the side plate and each ring plate. Is to form a notch and position the side plate and the ring plate by sequentially inserting the side plate and the ring plate into the shaft jig in a state where the notch is engaged with the guide projection.

Further, in the method of manufacturing a cross flow fan according to claim 3, in addition to claim 1 or 2, the blade 16 is inserted into the fitting hole 14 with the tip corner 16A of the blade 16 being inclined. .

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of a method of manufacturing a cross flow fan 10 according to the present invention will be described in detail with reference to the drawings. FIG.
FIG. 2 is a front view of a part of the cross flow fan 10 of the present invention, FIG. 2 is a front view of the ring plate 13, FIG. 3 is a right side view of FIG. 1, FIG. 4 is a left side view of FIG. Each shows a perspective view.

The cross flow fan 10 includes a pair of side plates 11 and 12.
, A plurality of ring plates 13, and a plurality of blades 16.
.., Which can be assembled by an assembly jig 20 described later. The ring plate 13 is formed in a ring shape with a predetermined synthetic resin, and has a thickness (about 2 mm) which does not deteriorate the fan performance such as a decrease in air volume and an increase in noise. This ring plate 1
3 is provided with a plurality of fitting holes 14... Arranged radially along the outer periphery at predetermined intervals.
.. Are formed at a predetermined inclination angle in the radial direction, and are configured to be able to fit a blade 16 described later (FIG. 2).

The inner diameter portion 15 of the ring plate 13 is provided with a notch 15A cut out toward the outside at a predetermined width, and auxiliary notches 15B, 15B.
5A and auxiliary notches 15B, 15B are provided at substantially equal intervals around the inner diameter portion 15. This notch 15A is the
Are positioned in the circumferential direction, and are set as reference positions of the respective fitting holes 14 provided in the ring plate 13. That is, each fitting hole 1 formed along the outer periphery of the ring plate 13
Are arranged at predetermined intervals based on the notch 15A. Further, the auxiliary notches 15B, 15B are provided with the notches 15A.
The notch is narrower, so that the notch 15A and the auxiliary notches 15B, 15B can be easily separated. It should be noted that the auxiliary notches 15B, 15B are used to improve the positioning accuracy of the fitting holes 14.

The one side plate 11 is formed of the same synthetic resin as the ring plate 13 and is formed into an annular shape substantially equivalent to the ring plate 13 (in this case, a notch and an auxiliary portion are formed at an inner diameter (not shown) equivalent to the ring plate 13). Notches are provided.) This side plate 11 also has a plurality of fitting holes 14 along the outer periphery.
Are provided at the same positions as the plurality of fitting holes 14 provided in the ring plate 13. One side of the side plate 11 is provided with a cylindrical fitting portion 11A protruding in the direction perpendicular to the direction of the right and left. The fitting portion 11A is provided with a fitting hole 2 provided in a shaft jig 21 described later.
1A, and a notch for positioning (not shown) is provided in the fitting portion 11A. Also,
A rotating shaft 1 made of metal or the like is provided at the center of the other surface of the side plate 11.
1B is formed by insert molding, and a plurality of fitting holes 14...
1B and provided concentrically (FIG. 6).

Also, the other side plate 12 is formed of the same synthetic resin as the ring plate 13 and is formed into an annular shape substantially equivalent to the ring plate 13 (in this case, a notch and an auxiliary portion are formed at an inner diameter (not shown) equivalent to the ring plate 13). Notches are provided.) This side plate 12 also has a plurality of fitting holes 14 along the outer periphery.
Are provided at the same positions as the plurality of fitting holes 14 provided in the ring plate 13. Screw holes 12A (in this case, four places) are provided inside the fitting holes 14 of the side plate 12.
27 is an auxiliary side plate, and 27A is a bolt fixing shaft for fixing to a rotating shaft of a motor (not shown).

The blade 16 is made of the same synthetic resin as that of the ring plate 13 and has a long and thin wall and a substantially circular cross section. The blade 16 has a predetermined twisted shape from one end to the other end (in this case, a spiral shape that is optimal for increasing the air volume and reducing noise when the cross flow fan 10 is operated to start blowing). The blade 16 has a shape that can be fitted into the fitting hole 14 provided in the ring plate 13, and both ends have a predetermined inclined shape (FIGS. 5 and 9).
Is presented. That is, the two corners 16 of the tip of the blade 16
A and 16A are inclined so that the end direction is narrow, and the opposite end corners 16A and 16A are similarly inclined and the end is narrow. Thereby, the blade 16
Are formed narrower than the respective fitting holes 14.
It is configured to be able to be inserted into each fitting hole 14 very easily.

On the other hand, the assembling jig 20 is constituted by a cylindrical jig 21 having a long axis and a cylindrical shape. The jig 21 is substantially the same as the inner diameter portion 15 of the ring plate 13 as shown in FIG. It has an outer diameter of. A guide projection 22 is provided on the outer diameter surface of the shaft core jig 21 so as to spirally protrude from one side to the other side. The cross section of the guide projection 22 is the inner diameter of the side plate 12 and the ring plate 13. 15 are formed in a shape substantially equivalent to the notch 15A. In addition, the guide projection 22 is
1 is provided at a predetermined interval from the other side, and the other side is open. The side plate 12 and each ring plate 13... Can be inserted or pulled out from the other side.

A fitting hole 21A is provided at the other end of the shaft core jig 21. The fitting hole 21 </ b> A is
1 is provided concentrically with the side plate 1.
1 is configured to be able to be fitted with the fitting portion 11A.
The fitting hole 21A is configured such that the fitting hole 14 provided in the side plate 11 is positioned and held in a state where the fitting portion 11A of the side plate 11 is fitted. A projection (not shown) is provided in the fitting hole 21A on the extension of the guide projection 22, and the projection is used to position the side plate 11 in the circumferential direction.

A ring-shaped collar 25 smaller than the side plate 12 and having a predetermined width is movably fitted to one side of the shaft core jig 21. By moving the collar 25 to one side from the other side of the shaft jig 21, the assembled cross flow fan 10 can be pulled out from the shaft jig 21. A stopper 26 having a predetermined shape is provided outside the collar 25 of the shaft jig 21, and the stopper 26 is fixed to the shaft jig 21 by a bolt or welding (not shown). Such a stopper 26 is configured to prevent the collar 25 from further moving to the other side.

Next, the procedure for assembling the cross flow fan 10 with the above configuration will be described. An index gear (not shown) is fixed outside the stopper 26 of the shaft jig 21.
It is assumed that the fitting holes 14 formed in the side plate 12 are sequentially moved one by one by the index gear. A blade delivery device (not shown) is provided beside the index gear.
Shall be provided. In this case, the blade delivery port of the blade delivery device is provided on an extension of the helically communicating fitting holes 14... Of the side plates 11 and 12 and the ring plates 14. Each time the fitting hole 14 moves by one in synchronization with the
Is sent out one sheet.

First, the fitting hole 14 provided in the side plate 12 is
And inserted from the other side of the shaft core jig 21 (FIGS. 6 and 7). At this time, the notch of the inner diameter (not shown) provided on the side plate 12 is fitted to the guide projection 2 provided on the shaft core jig 21.
2, the shaft jig 21 is inserted in one direction from the other side. In such a case, the side plate 12 is inserted into one side of the shaft jig 21 while rotating along the spiral guide protrusion 22 provided on the shaft jig 21.

Next, the fitting hole 14 of the ring plate 13 is aligned in the same direction as the fitting hole 14 of the side plate 12 previously inserted, and the shaft jig 21 is inserted from the other side. Similarly to the side plate 12, the ring plate 13 is inserted while engaging the notch 15A with the guide protrusion 22 of the shaft core jig 21 and inserting the notch 15A while rotating along the spiral guide protrusion 22. This is repeated for the number of used ring plates 13 (in this case, seven ring plates 13 are used).

Finally, the fitting portion 11A of the side plate 11 is fitted and inserted into a fitting hole 21A provided on the other side of the shaft jig 21. In this case, a notch (not shown) provided in the fitting portion 11 </ b> A of the side plate 11 is provided in the fitting hole 2 provided in the end of the shaft jig 21.
Engage with a projection (not shown) in 1A. Thereby, the side plate 11 is positioned and held on the other side of the shaft core jig 21.

Next, the side plates 11, the respective ring plates 13... And the side plates 12 are positioned and arranged at predetermined intervals. In this case, a spacing jig (not shown) is inserted between the side plates 11, 12 and each of the ring plates 13... By an air cylinder, whereby the side plates 11, each of the ring plates 13. The jig 21 is fixed substantially perpendicularly. Then, a chuck (not shown) is moved horizontally to set the axis jig 2
After holding the side plate 11 provided on one other side, the collar 25 is moved and pressed against the side plate 12 side. Such side plates 11, 12
Are held between the chuck and the collar 25 and are positioned at intervals of the interval holding jig.

Thus, the side plate 11 and each ring plate 13
, And the side plates 12 are arranged at predetermined intervals in a state of being inserted into the shaft core jig 21, and the arranged side plates 11
And the respective fitting holes 14 of the ring plates 13... And the respective fitting holes 14. Is done. Then, the shaft core jig 21 rotates to fit the fitting hole 1.
4 is initially set, so that one fitting hole 14 of the side plate 12 is located on an extension of the blade 16 delivered from the blade delivery device provided on the side of the shaft jig 21.

Next, one blade 16 is delivered by an air cylinder (not shown) from the blade delivery device. In this case, the blade 16 may be manually inserted without using the blade delivery device. Then, the blade 16 sent out is inserted into the fitting hole 14 of the side plate 12 on one side.
.. And the fitting holes 14 of the side plate 11 are sequentially inserted (dotted arrows in FIG. 8). In such a case, since the tip corner 16A of the blade 16 has an inclined shape, the blade 16
Are easily inserted into the fitting holes 14. Thereby, the blade 16 is inserted without being caught on the edge of each fitting hole 14. The insertion position of the blade 16 is determined by the air cylinder of the blade delivery device.

Then, the blade 16 is connected to each of the fitting holes 14.
, The ultrasonic welding machine (not shown) descends, and the fitting holes 14... And the blade 16 are ultrasonically welded. Thereby, both side plates 11, 12 and each ring plate 1
3 and the blade 16 are fixed (temporarily fixed). The ultrasonic welding technique for welding by applying the ultrasonic vibration energy is a well-known technique and will not be described.

Next, the index gear is driven to rotate the shaft jig 21 (in this case, the shaft jig 21 may be rotated by a stepping motor or the like), and the fitting hole 14 of the side plate 12 is formed. Move one. As a result, the next fitting hole 14 of the blade 16 inserted into the side plate 12 is positioned on the delivery line of the blade 16 delivered from the blade delivery device. Then, one blade 16 is sent again from the blade sending device.

In this case as well, after the blade 16 is inserted into the fitting hole 14 of the side plate 12 on one side,
. And the fitting holes 14 of the side plate 11 are sequentially inserted. Also in such a case, the blade 16 is inserted without being caught by the edges of the fitting holes 14. Then, the blade 16 is inserted into each of the fitting holes 14.
.. and the blades 16 are ultrasonically welded to the fitting holes 14... And the blades 16 by the ultrasonic welding machine as described above. This is repeated while the blade 16 is fixed.

After the blade 16 has been inserted into all of the fitting holes 14 provided in the side plates 11 and 12 and the ring plates 13..., And the welding has been completed, the chuck holding the side plate 11 To the original position. Next, the collar 2 is moved along the spiral of the guide projection 22 provided on the shaft core jig 21.
5 while rotating, and pushing the side plate 12 in the direction of the arrow (FIG.
Extract. In this case, since the cross flow fan 10 also rotates by the rotation of the collar 25, the cross flow fan 10
Can be pulled out from the shaft core jig 21 while being rotated along the spiral. Thereafter, the collar 25 is returned to the original position.

Next, the fixed shaft 27A of the auxiliary side plate 27 is positioned in the opposite direction to the ring plate 13 so that the screw hole 12A of the side plate 12 is formed.
.. Are fixed by screws 28, and then both side plates 11, 12 and each ring plate 13
Apply an adhesive to all of the ultrasonic welding points of the and the blade 16 and fix them. Thereby, the assembly of the cross flow fan 10 is completed, and the cross flow fan 10 can be continuously assembled by repeating this process.

As described above, the spiral guide protrusion 22 is formed on the surface of the shaft jig 21 and the notch 15A provided on each of the side plates 11, 12 and each ring plate 13. Since it is inserted into the shaft jig 21 while being engaged, both side plates 11 and 12 and each ring plate 13.
The fitting holes 14 provided in... Can be communicated with each other in accordance with the twist shape of the blade 16. This allows
The blade 16 is easily inserted from the fitting hole 14 of one side plate 12 through the fitting hole 14 of each ring plate 13 to the fitting hole 14 of the other side plate 11. Becomes possible.

Further, a corner 16A at the tip of the blade 16
.. Are formed narrower than the fitting holes 14... So that they do not easily get caught on the edges of the respective fitting holes 14. Can be inserted into In addition, since the blade 16 is elongated so as to be located from end to end of the side plates 11, 12, there is no step between the side plates 11, 12, and the ring plates 13,. Thus, it is possible to reduce the rotational noise and the like of the cross flow fan 10 without deteriorating the external appearance.

Further, since the blade 16 is elongated from one side plate 12 to the other side plate 12, both blades 1
1 and 12 and blades 1 provided on each ring plate 13.
Even when the distance between the blade 6 and the blade 16 is changed, or when the size of the blade 16 is changed, the cross flow fan 10 can be easily assembled only by changing the feed of the blade delivery device and the index gear.

In the embodiment, the blade 16 is inserted into each of the fitting holes 14 communicating in a predetermined spiral shape. However, the present invention is not limited to this. A guide jig for spirally communicating the holes 14, 14 may be provided to insert the blade 16.

[0036]

As described above in detail, according to the present invention, each side plate having a plurality of radial fitting holes formed along the outer periphery and each ring plate are connected from one side plate to the other side plate. And the fitting holes of the ring plate are sequentially displaced in the circumferential direction, and the blade is formed in a predetermined twisted shape. Through the mating hole, it is possible to easily insert the mating hole in the other side plate. Therefore, the assembling work becomes extremely easy, the mass productivity is improved, and the cost can be significantly reduced. In particular, since the blade is continuous from one side plate to the other side plate, there is no step of the blade which has been a problem in the past, and it is possible to extremely reduce the rotational noise of the cross flow fan.

According to a second aspect of the present invention, in addition to the first aspect, a spiral guide projection is formed on the surface of the shaft core jig,
Since the notches provided in the inner diameter portions of the side plates and the respective ring plates are engaged with the guide projections, the fitting holes of the both side plates and the respective ring plates disposed therebetween are twisted. Can be accurately and easily arranged at the position where the blade passes. Therefore, the blade can be smoothly inserted from the fitting hole of one side plate through the fitting hole of each ring plate to the fitting hole of the other side plate, greatly improving the assembling workability. Can be done.

According to the third aspect of the present invention, in the first or second aspect, the blade is inserted into the fitting hole in a state where the tip corner portion is inclined, so that the side plate and the ring plate are provided. Also, the blade can be inserted very smoothly even in the spirally formed fitting hole formed in the side plate. As a result, the twisted blade can be inserted into each fitting hole with high accuracy, and it is possible to reliably prevent inconveniences such as the blade getting stuck on the edge of each fitting hole. Therefore, the workability of inserting the blade into each fitting hole can be significantly improved.

[Brief description of the drawings]

FIG. 1 is a partially longitudinal front view of a cross flow fan of the present invention.

FIG. 2 is a front view of a ring plate.

FIG. 3 is a right side view of FIG. 1;

FIG. 4 is a left side view of FIG. 1;

FIG. 5 is a perspective view of a blade.

FIG. 6 is an assembled front view of the cross flow fan.

FIG. 7 is an assembled front view of another cross flow fan.

FIG. 8 is a perspective view of a blade inserted into a spirally arranged fitting hole.

FIG. 9 is an enlarged perspective view of a tip corner of a blade inserted into a fitting hole.

FIG. 10 is a diagram showing a state in which a cross flow fan is extracted from a shaft jig.

FIG. 11 is an assembled perspective view of a conventional cross flow fan.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Cross flow fan 11 Side plate 11A Fitting part 12 Side plate 13 Ring plate 14 Fitting hole 15 Inner diameter part 15A Notch 16 Blade 16A Corner 20 Assembly jig 21 Shaft core jig 22 Guide projection

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[Procedure amendment]

[Submission date] August 26, 1996

[Procedure amendment 1]

[Document name to be amended] Drawing

[Correction target item name] All figures

[Correction method] Change

[Correction contents]

FIG.

FIG. 2

FIG. 3

FIG. 6

FIG. 4

FIG. 5

FIG. 7

FIG. 8

FIG. 9

FIG. 10

FIG. 11

Claims (3)

[Claims] 1. A disk-shaped or annular side plate provided on both sides, a plurality of ring plates provided at intervals between the side plates and provided concentrically with the both side plates, and a side plate and a ring A method of manufacturing a cross flow fan comprising a plurality of blades attached along the outer periphery of a plate and extending in the longitudinal direction thereof, wherein a plurality of radial fitting holes are formed along the outer periphery of the both side plates and each ring plate. From the side plate on one side to the side plate on the other side, the fitting holes of each side plate and the ring plate are sequentially arranged in a state shifted in the circumferential direction, and the blade is formed in a predetermined twist shape, and the one side plate is formed. A method for manufacturing a cross-flow fan, wherein the cross-flow fan passes through the fitting hole of each ring plate from the fitting hole of the side plate and is fixed to the fitting hole of the other side plate. 2. A shaft jig having a spiral guide projection formed on a surface thereof is prepared, and a notch is formed in an inner diameter portion of a side plate and each ring plate, and the notch is engaged with the guide protrusion. 2. The method for manufacturing a cross flow fan according to claim 1, wherein the side plate and the ring plate are positioned by sequentially inserting the side plate and the ring plate into the shaft core jig in a state in which the side plate and the ring plate are inserted. 3. The method of manufacturing a cross flow fan according to claim 1, wherein the blade is inserted into the fitting hole in a state in which the tip corner of the blade is inclined.