JP2000233241A - Fastening structure of plate member and method of fixing plate member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily and simultaneously insert/fit one side ends of members to be mounted such as blades, which are erected in many with the other side ends held, into inserting small holes or grooves of plate members corresponding to respective members to be mounted. SOLUTION: This fastening structure of plate members and members to be mounted is constituted so that small holes or grooves are pierced to plate members represented by side plates 3 in an impeller, end parts 2-1 of members to be mounted represented by blades 2 in the impeller are inserted into the holes or the grooves and both are held/fixed. To this end, the small holes or grooves are formed as its one side is a louvered part, by bending back the louvered part, the end parts of the member to be mounted fitted into the small holes or grooves are held/fixed. Alternatively, end part small holes are formed in the blade end parts fitted into the small holes or grooves formed in side plates, the tips due to bending back the louvered parts of the side plates are bitten into the end part small holes, thus, holding strength is increased.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plate member having a small hole or a groove formed thereon, such as a fastener between a side plate and a blade of an impeller, and a cover member fitted and held in the small hole or the groove. The present invention relates to means for fastening to a member.

[0002]

2. Description of the Related Art A sirocco fan impeller will be described as a typical example of the object of the present invention. 5 to 7 are a front view, a partial cross-sectional view taken along an arrow, and an explanatory view showing a state of assembling a side plate and a blade, respectively, showing a configuration of an impeller of a sirocco fan.

Since the entire structure of the impeller is well known, its details will be omitted. However, as shown in FIG. 6 showing one blade forming the impeller, one end of the blade is fastened to a small hole in the lower side plate. The other ends of the blades arranged in an arc shape are fixed to and held on the upper side plate by fitting the fastening projections into the small holes. Normally, both side plates constituting the impeller are fixed to each other by a number of blades arranged in parallel, so that the blade insertion hole of the side plate and the fastening projection on the blade side need to have a dimensional relationship close to alignment, resulting in misalignment and holding strength. From the viewpoint of maintenance, the so-called large play of the fitting portion is not preferable. Therefore, when the number of blades is small, there is no problem even when the blades are fitted and inserted at the same time. Then
The reality is that the difficulty of insertion and assembly is high and the cost disadvantage is great.

FIG. 7 shows a state in which the other end of the blade is inserted into the conventional side plate as described above. Although one end of each blade is held by the lower side plate, a large number of parallel The blades are not necessarily expected to be positioned so as to face the insertion holes in the upper side plate.Each of them is shifted back and forth. Could not be fitted to

[0005]

In the conventional structure as described above, it is extremely difficult to simultaneously insert and insert the other ends of a large number of parallel blades into the small insertion holes of the side plates corresponding to the respective blades. In fact, significant improvements were required in terms of man-hours.

[0006]

According to the present invention, there is provided a fastening structure for a plate member and a member to be adhered, wherein a small hole or groove is formed in a plate member represented by a side plate of an impeller, and the small hole or groove is formed in the small hole or groove. Similarly, in order to insert and hold and fix both ends of the adhered member typified by the blade of the impeller, a small hole or groove formed in the plate member has one side formed as a cut-and-raised portion. The end of the adhered member fitted in the small hole or groove is configured to be held and fixed by bending back, or the end of the blade fitted in the small hole or groove formed in the side plate, An end small hole is formed, and the tip by bending back of the cut-and-raised portion of the side plate is configured to increase the holding strength by biting into the end small hole,

Further, as a method for realizing the above configuration,
A step of forming a small hole or groove whose one side is formed as a cut and raised part in the plate member, and a step of inserting the attached member end into the small hole or groove in order to insert the end of the adherend member; And a step of bending back the cut-and-raised portion formed in the small hole or groove with the end of the adhered member inserted.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiments of the present invention will be described below with reference to the drawings as an example of a side plate and a blade forming an impeller of a sirocco fan as a typical embodiment of the object configuration as described above. Needless to say, the present invention is applied to fastening with a member to be fitted and held on the member.

FIG. 1 is a partial cross-sectional view of an example of an impeller according to the present invention. A large number of blades fixed to a lower side plate and arranged side by side are held at the other end by an upper side plate. One side of the blade insertion hole or groove is formed as a cut-and-raised portion so that it can be understood with reference to the explanatory views showing the state of insertion fitting in FIGS.

As shown in FIG. 3, when the insertion small hole or groove formed in the upper side plate is made to approach the upper other end of the parallel blades, the insertion small hole or groove having the cut and raised portion as one side is provided. Is formed to a size larger than the thickness of the blade, with the intention of facilitating insertion, embodying the insertion state as shown in FIG. 4, and bending the cut-and-raised portion shown in both figures back to the original side plate plane side, The blade fixing process shown in FIG. 1 is obtained.

Further, in order to increase the fastening strength of the blade end by bending back the cut-and-raised portion, an end small hole is formed in the blade end as shown in FIG. It is also friendly to make the tip of the cut-and-raised part into the end small hole.

In the above-described example, the structure in which the cut-and-raised portion is formed in the small insertion hole or groove of one upper side plate is shown.
It goes without saying that the present invention can be applied also to the lower side, and it goes without saying that the shape of the small hole or groove provided in the side plate can be arbitrarily selected.

Further, as for the fixing means after the fitting of the side plate and the blade end, in addition to welding by laser beam irradiation, conventionally known means can be arbitrarily added.

As described above, not limited to the impeller,
Needless to say, it is useful as a fastening means in a plate member having a small hole or a groove formed thereon and a general structure of a member to be fitted fitted in the small hole or the groove.

[0015]

The fastening means for connecting the plate member and the member to be attached according to the present invention is not only easy to insert and fit, but also has high utility value as a highly reliable fastening means in the holding structure after fitting. high.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing a partial cross section of an example of an impeller according to the present invention.

FIG. 2 is a partially enlarged cross-sectional view of another example of the impeller according to the present invention.

FIG. 3 is an explanatory diagram showing a state before an end of a blade (attachment member) is inserted into a side plate (plate member) in the example of FIG. 1 or FIG. 2;

FIG. 4 is an explanatory view showing a state in which an end of a blade (attached member) is inserted into a side plate (plate member) in the example of FIG. 1 or FIG. 2;

FIG. 5 is a front view of an impeller shown as an example according to the prior art.

6 is a cross-sectional view of the example of FIG. 5 as viewed from the direction of the arrow, showing a fitted state of a side plate (plate member) and a blade (attachment member).

FIG. 7 is an explanatory diagram showing a state before fitting of a side plate (plate member) and a blade (attachment member) in the example of FIG. 5;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Impeller 2 Blade (attached member) 2-1 Small protrusion for insertion and fitting of blade (fitting portion of attached member) 2-2 Drilled in small projection for insertion and fitting of blade (fitting portion of attached member) End small hole 3 The other side plate (plate member) 3-1 Small hole or groove in the other side plate 3-2 Cut-and-raised portion constituting one side of small hole or groove in the other side plate 3-2 'Cut-and-raised portion 4 One side plate (plate member) 4-1 Small hole or groove in one side plate

Claims (4)

[Claims] 1. A fastening structure of a plate member and an attached member, wherein a small hole or a groove is formed in the plate member, an end of the adhered member is inserted into the small hole or the groove, and both are held and fixed. One side of the small hole or groove formed in the member is formed as a cut-and-raised portion, and the end of the adhered member fitted into the small hole or groove is held and fixed by bending back the cut and raised portion. The fastening structure between the plate member and the adherend member. 2. A small hole or groove formed in a side plate of an impeller formed by a plurality of blades suspended on the both side plates and a plurality of blades suspended on the both side plates, wherein one side of each of the small holes or grooves is formed in the side plate. The impeller is formed as a cut-and-raised portion, and the bent end of the cut-and-raised portion is configured to hold and fix the fitted end of the blade fitted into the small hole or groove. Fastening structure between side plate and blade. 3. An end small hole is formed at an end of a blade fitted into a small hole or a groove formed in a side plate, and a tip of the cut and raised portion of the side plate is bent to return to the end small hole. 3. The fastening structure between the side plate and the blade in the impeller according to claim 2, wherein the holding strength is increased by biting into the blade. 4. A step of forming a small hole or groove having one side formed as a cut-out portion in the plate member for inserting the end of the adhered member, and the end of the adhered member in the small hole or groove. And a step of bending back the cut-and-raised portion formed in the small hole or groove with the end of the adhered member inserted, and a plate member and an adhered member, How to fix.