JPH0772555B2 - Cross-flow fan manufacturing method - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cross-flow fan used in a blower, and more particularly to a method for manufacturing a cross-flow fan with improved assemblability and assembly accuracy of the cross-flow fan.

2. Description of the Related Art A conventional method for manufacturing a cross-flow fan as shown in FIG. 4 is known in which a plurality of cross-flow fan split stations 100 as shown in FIG.

That is, this cross-flow fan split station 100 includes a side plate 101 and a blade 1.
It was composed of 02. And the crossflow fan is the sixth
Using the vibrating pressure head 104 and the holder 105 as shown in the figure, 1
It was manufactured by ultrasonically welding the blades 102 of one cross-flow fan split train 100 and the side plates 101 of the other cross-flow fan split run 100.

As for the displacement of the welding essential portion 106, an appropriate fitting groove in which the tip of the blade 102 is fitted to the side plate 101 as shown in FIG.
The problem has been solved by providing 103 or providing an appropriate escape prevention guide 107 on the processing device side as shown in FIG. Such a manufacturing method is disclosed, for example, in Japanese Patent Publication No. 54-6722.

As another example, as shown in the prior art of Japanese Patent Laid-Open No. 53-34108, as shown in FIG. 8, a plurality of sirocco fans 108 are axially joined and bonded by bonding. The method of making is known.

That is, as shown in FIGS. 7A and 7B, the sirocco fan 108 is composed of a large number of blades 110 extending in the axial direction on the outer circumference of a circular side plate 109 and a ring 111 connecting the blades 110. It had been. The side plate 109 of one sirocco fan 108 and the ring 111 of the other sirocco fan 108 are joined together at a flat adhesive surface 112.

However, in the former conventional example, in the case of the cross-flow fan split unit 100 shown in FIG. 5, when the positional deviation of the blade 102 in the direction perpendicular to the axis is large, the positioning with the fitting groove 103 is difficult. If it takes too much time or the displacement is extremely large,
Since the positioning is impossible, and the width of the fitting groove 103 needs to be set to a size that can absorb the positional deviation of the blade 102 to some extent, the pitch of the blade 102 after adhesion has been varied.

Further, in the latter conventional example, as shown in FIGS. 7 (a) and 7 (b), the side plate 109 of one sirocco fan 108 and the ring 111 of another sirocco fan 108 are joined by a flat adhesive surface 112. It is difficult to align the axes, or if a recess 114 is provided in the ring 113 as shown in FIGS. 9A and 9B, the outer peripheral surface of the side plate 109 and the inner peripheral surface of the recess 114 of the ring 113 are joined. Even if it does, the thickness of the joint becomes thicker, the ratio of the blades 110 to the total length of the cross-flow fan becomes smaller, and the air flow rate of the cross-flow fan decreases, and the performance of the cross-flow fan deteriorates.

In view of the above-mentioned conventional problems, the present invention assembles a cross-flow fan split station after dividing and molding the cross-flow fan. At that time, the assembling work is facilitated and the rotary shaft is properly centered. The purpose is to manufacture a cross flow fan that can be used.

Means for Solving the Problems In order to solve the above problems, the present invention provides a groove-shaped or hole-shaped fitting recessed portion that is positioned at the same interval as the interval between the blades on the outer peripheral edge of the side plate in the cross flow fan split ream. And a fitting convex portion that fits with the fitting concave portion is provided at the tip of the blade on the ring plate side, and the outer diameter of the side plate and the inner diameter of the ring plate have substantially the same size, and the side plate And the ring plate and the total plate thickness when both are joined are approximately the same size, the plate side is inserted into the inner periphery of the ring plate, the fitting recess and the fitting projection and the side plate of the blade. It is a joint of joints.

Action The present invention joins the groove-shaped or hole-shaped fitting concave portion of the side plate and the fitting convex portion of the blade, and the outer diameter of the side plate and the inner diameter of the ring plate are substantially the same size. By inserting and connecting the side plate to the inner circumference of the ring plate with no rattling between the ring plate and the ring plate,
The centering after connection of one cross-flow fan split station and another cross-flow fan split station becomes reliable.

Further, since the side plate is inserted into the inner circumference of the ring plate and is joined and connected in a fitted state, the thickness of the joint portion between the reams can be reduced.

Embodiment An embodiment of the present invention will be described below with reference to the accompanying drawings.

FIG. 2 shows a cross flow fan assembled by the method of the present invention.

This cross-flow fan includes a plurality of cross-flow fan split stations 7 having the same structure, a cross-flow fan split station 6 connected to a driving means such as a motor (not shown), and a support plate for axially supporting the other end of the cross-flow fan. No. 8 is used, but the joining method of each joining portion is the same.

The cross-flow fan split station 7 is a disk-shaped or annular side plate 2
And a ring plate 3 which is arranged at a constant interval from the side plate 2 and is formed in an annular shape concentric with the side plate 2, and between the side plate 2 and the ring plate 3 in a radial order and along the outer peripheries thereof. It is composed of a plurality of blades 1 mounted as a unit.

Further, the support plate 8 has a side plate 2g having the same shape as the side plate 2 of the cross flow fan split station 7, and a support shaft 9 is provided at the center thereof.

Further, the cross-flow fan split station 6 is connected to a driving means such as a motor, and has the same basic structure as the cross-flow fan split station 7, and the side plate 2h is a boss for connecting to the rotary shaft of the drive means. There is a slight difference in that part 10 is provided.

Next, the joint portion of each of the cross flow fan split stations 6 and 7 and the support plate 8 will be described with reference to FIG.

In the figure, the side plate 2 has a fitting concave portion 4 located at the same interval as the interval of the blade 1 on the outer peripheral edge, and further has a fitting convex portion 5 fitted to the fitting concave portion 4 at the tip of the blade 1. .

The inner diameter dimension φ3d of the ring plate 3 connecting between the blades of the blade 1 is formed to be substantially the same as the outer diameter dimension φ2d of the side plate 2, and when joining the cross flow fan split stations 6 and 7 and the support plate 8, It is configured so that these axial centers can be extremely easily aligned.

Also, the thickness dimension 3a of the ring plate 3 and the thickness dimension 2 of the side plates 2, 2h, 2g
a is set to the same size, and joins each of the cross-flow fan split stations 6 and 7 and the support plate 8, and after connection, as shown in FIG.
2a and 3a are configured to match. Furthermore, the relationship between the dimensions 3f and 3g of the welding margin t of the blade 1 and the dimensions 2e and 2f of the fitting recesses 4 of the side plates 2, 2h and 2g is sufficient to ensure sufficient welding strength.
After welding and assembling, the thickness of the joint portion is configured so as not to be thicker than that of the side plate 2.

The relationship between the dimensions 3b, 3c of the welding allowance t of the blade 1 and the dimensions 2b, 2c of the fitting recess 4 of the side plate 2 is such that the escape spaces 3h, 3i are set so that the molten resin of the welding allowance t can escape during the welding. Are set to have a dimensional relationship in which is formed.

Further, the size 3e of the ring plate 3 is set to a size (about 2 mm) that does not deteriorate the performance of the fan such as a decrease in the air volume of the fan and an increase in noise.

Next, a method of assembling each of the cross flow fan split stations 6 and 7 and the support plate 8 will be described.

First, the support plate 8 and the cross flow fan split station 7 are joined. At the time of the joining, the cross flow fan split station 7 is inserted into the side plate 2 with the inner peripheral surface 11 of the ring plate 3 being guided by the outer peripheral surface 12 of the side plate 2, and then the fitting convex portion 5 of the blade 1 of the side plate 2. The fitting recess 4 is fitted and joined. After joining, the blade 1 and the side plate 2 are ultrasonically welded over the entire circumference of the welding margin t of the blade 1.
Connect. Here, the ultrasonic welding technique for welding by applying ultrasonic vibration energy is omitted because it is a well-known technique.

Next, a cross-flow fan split station 7 having the support plate 8 welded thereto,
Other cross-flow fan split stations 7 are joined. The connection method is
As described above, the method is the same as the method of joining and connecting the support plate 8 and the cross-flow fan split station 7.

Hereinafter, the same procedure is repeated, and after connecting a plurality of the cross-flow fan split stations 7, the cross-flow fan split station 6 may be finally joined. The connection method is as follows:
And the method of joining and connecting the cross-flow fan split stations 7 to each other.

In the above assembling method, the inner peripheral surface 11 of the ring plate 3 and the outer peripheral surfaces 12 of the side plates 2, 2h, 2g are guided and fitted into each of the cross flow fan split stations 6 and 7 and the support plate 8, and the blade 1 is fitted. Since the fitting convex portion 5 is fitted and joined to the fitting concave portion 4 of the side plates 2 and 2g, the axial centering of the cross flow fan split stations 6 and 7 and the support plate 8 and the rotation angle between the blades 1 are mutually performed. The position of can be easily set.

Further, since the ring plate 3 and the side plate 2 of each of the cross flow fan split stations 6 and 7 are fitted to each other, the thickness dimension 13 of the side plate 2 located between each of the cross flow fan split stations 6 and 7 after connection is the thickness of the ring plate. The dimension is approximately the same as the dimension 3a or the thickness dimension 2a of the side plate 2. As a result, the ratio of the blade 1 to the total length of the cross flow fan can be increased. Therefore, the amount of airflow can be increased and the performance of the fan can be improved.

Effects of the Invention The method for manufacturing a cross flow fan according to the present invention has the following effects.

(1) The inner diameter of the ring plate and the outer diameter of the side plate of each of the cross flow fan split stations are set to substantially the same size, and the inner peripheral surface of the ring plate is guided and inserted into the outer peripheral surface of the side plate, and then the fitting protrusion of the blade is inserted. Is fitted in the fitting recess of the side plate, and by joining and connecting the fitting convex part and the joint part of the fitting recess and the side plate in the blade, centering of the axial center of each cross flow fan split ream, Since it is possible to easily set the angle of rotation between the blades, it is possible to manufacture a highly accurate fan with very little runout.

(2) By fitting the ring plate and the side plate of the divided reciprocating fan of each cross flow fan, the thickness of the joint can be made thin, so that the ratio of the blade to the total length of the cross flow fan can be made large, and in terms of air volume, etc. It is possible to manufacture high-performance fans.

[Brief description of drawings]

FIG. 1 is a detailed cross-sectional view of a joint showing a cross-flow fan split connection before joining by a method for manufacturing a cross-flow fan according to the present invention, FIG. 2 is a front view in which a part of the cross-flow fan is cut away, and FIG. FIG. 4 is a detailed cross-sectional view of a joining portion showing a joining state of the cross-flow fan split ream of the cross-flow fan, FIG. 4 is a perspective view of the cross-flow fan showing a conventional example, and FIG. 5 is a perspective view showing the cross-flow fan split ream of the same cross-flow fan. FIG. 6 is a cross-sectional view showing an assembled state of the same cross-flow fan, and FIGS. 7 (a) and 7 (b) are front and side views of a cross-flow fan split station of a cross-flow fan showing different conventional examples, and FIG. 8 is the same. FIG. 9A and FIG. 9B are front views of a partial cross-flow fan split station assuming a modified example of the joint part of the same cross-flow fan. Figure, side view, and Fig. 10 show the cross-flow fan split stations shown in Fig. 9 connected in the axial direction. -Out part cut-out assuming the state is a front view. 1 …… Blade, 2,2g, 2h …… Side plate, 3 …… Ring plate,
4 ... Fitting concave part, 5 ... Fitting convex part, 6,7 ... Cross-flow fan split station, 8 ... Support plate, φ2d ... Side plate outer diameter, φ3d ... Ring plate inner diameter.

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Shotaro Ito 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (56) References (JP, B2)

Claims (1)

[Claims] 1. A disk-shaped or annular side plate, a ring plate arranged at a constant interval from the side plate and formed in an annular shape concentric with the side plate, and radially and sequentially between the side plate and the ring plate. A cross-flow fan having a plurality of cross-flow fan split stations each having a plurality of blades attached along the outer periphery of the two, and forming a cross-flow fan extending in the axial direction by sequentially connecting side plates and blades in each of the cross-flow fan split stations. In the manufacturing method of, in the outer peripheral edge of the side plate,
A groove-shaped or hole-shaped fitting recessed portion that is positioned at the same interval as the blades is provided, and a fitting convex portion that fits with the fitting recessed portion is provided at the tip of the blade on the ring plate side, and The outer diameter of the side plate and the inner diameter of the ring plate are substantially the same size, and the total plate thickness when the side plate and the ring plate and both are joined is substantially the same size, and the plate side is the inner circumference of the ring plate. A method of manufacturing a cross-flow fan, wherein the cross-flow fan split ream is connected in the axial direction by inserting the cross-flow fan split ream into the fitting recess, the fitting projection, and the joining portion of the side plate of the blade.