Pumps – Motor driven – Electric or magnetic motor
Reexamination Certificate
1999-06-10
2001-01-16
Walberg, Teresa (Department: 3742)
Pumps
Motor driven
Electric or magnetic motor
Reexamination Certificate
active
06174145
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of Invention
The present invention relates to an axial flow blower device which can be used for various purposes, for instance, for cooling an O.A. equipment, and the like.
2. Description of Related Art
A construction of an axial flow blower device, that is conventionally used, will be described with reference to FIG.
5
. This construction is disclosed, for instance, in Japanese Utility Model Laid-open No. Hei 4-16620, or the like. A frame
1
includes end plates
2
and
3
opposite to each other and a connecting plate
4
connecting these end plates
2
and
3
together. The end plates
2
and
3
provide a circular hole
5
that forms a cylindrical wind tunnel of the frame
1
. A circular motor mounting plate
6
is provided at a central portion of the end plate
2
, and is supported by support members
7
projecting from portions of the end plates
2
to the motor mounting plate
6
.
The motor supporting (mounting) plate
6
supports a bottom portion of an electrically driven motor
8
, and a fan
9
is mounted on a rotary shaft (not shown) of this motor
8
so that the rotation of the fan
9
within the cylindrical wind tunnel of the frame
1
causes an air flow introduced from the end plate
2
side toward the end plate
3
side, or in its opposite direction.
Two lead wires
10
for supplying electric current to the motor
8
are extended to a surface of the support member
7
from a notch
7
a
formed on a portion of the support member
7
, and inserted through openings
11
and
12
respectively provided on the end plates
2
and
3
into support grooves provided behind the openings
11
and
12
, and then drawn rearwardly from the end plate
3
so that the lead wires
10
are connected to a power source.
FIG. 6
shows the detail of a portion of the opening
11
in an enlarged manner, and
FIG. 7
shows the detail of a portion of the opening
12
portion in an enlarged manner.
Behind the opening
11
, a support groove
13
which allows the lead wires
10
to pass through the end plate
2
and which supports the outer periphery of the lead wires
10
, and a guide groove
14
which guides the lead wires
10
from the support member
7
side to the support groove
13
side are provided. The width dimension of the opening
11
for the lead wires
10
is set so as to permit the single lead wire
10
to just pass through the opening
11
(that is, the width dimension is slightly larger than the outer diametric dimension of the single lead wire
10
). The support groove
13
behind the opening
11
is in the form of a rectangle shape such that the vertical side is longer.
The opening
12
and the support groove
15
on the end plate
3
side as shown in
FIG. 7
are similar in construction to the opening
11
and the support groove
13
on the end plate
2
side with the exception of the guide groove that is not provided on the end plate
3
side. That is, the support groove
15
, which allows the lead wires
10
to pass through the end plate
3
, which supports the outer periphery of the lead wires
10
and which is in the form of the vertical-side-longer rectangle shape, is provided behind the opening
11
. On the end plate
3
side, the width dimension of the opening
12
for the lead wires
10
are similarly set so as to permit the single lead wire
10
to just pass therethrough.
In this construction, the wiring work of the lead wires
10
after the motor
8
is mounted onto the motor support plate
6
is carried out in the following manner: The lead wires
10
connected to the motor
8
are drawn out from the notch
7
a
of the support member
7
to the surface side of the end plate
2
, and then extended on and along the support member
7
while being guided through the guide groove
14
so as to be positioned on the outer peripheral portion of the side plate
2
. Thereafter, the two lead wires
10
are set horizontally so that the height thereof corresponds to the height of the single lead wire, and then passed through the opening
11
of the end plate
2
and the opening
12
of the end plate
3
simultaneously. Subsequently to that, the two lead wires
10
are twisted 90 degrees so as to be supported by the support grooves
13
and
15
.
FIG. 8
shows a state of the lead wires
10
which have been inserted into and supported by the support grooves
13
and
15
in this manner.
In the construction described above, when the lead lines
10
are inserted into the openings
11
and
12
, since each of the openings
11
and
12
has the width dimension corresponding only to the single lead wire, the lead wires
10
can not be inserted into the openings
11
and
12
unless the lead wires
10
guided by the guide groove
14
are twisted 90 degrees. The lead wires
10
in the twisted state are passed through the openings
11
and
12
and moved into the supported grooves
13
and
15
where the lead wires
10
are twisted 90 degrees again. This is caused by the guide groove
14
and the support grooves
13
and
15
having shapes which are elongate in the same direction, as well as by the openings
11
and
12
which are open in a direction perpendicular to the elongating direction and which correspond in height only to the single lead wire
10
.
Therefore, there arises a problem in which the passage of the lead wires
10
through the openings
11
and
12
may cause the damage on sheathes of the lead wires
10
. The openings
11
and
12
can be made larger to prevent the damage on the lead wires
10
, but as the openings
11
and
12
are made larger, the lead wires
10
cannot be sufficiently supported within the support grooves
13
and
15
, so that there arises another problem in which the lead wires
10
are likely to be removed externally from the openings
11
and
12
.
SUMMARY OF THE INVENTION
The present invention was made in view of these problems. It is an object of the present invention to provide an axial flow blower device, which can improve the workability for supporting lead wires at the openings, and which can facilitate the support for the lead wires without any damages on sheaths of the lead wires.
In order to solve the above-mentioned problems, according to a first aspect of the present invention, there is provided an axial flow blower device having a frame provided with end plates opposite from each other to form a wind tunnel between the end plates, a motor supported by support members projecting from one side surface of the end plate toward a central portion of the wind tunnel, and lead wires connected to the motor. The axial flow blower device according to a first aspect of the present invention is characterized by including: openings respectively provided on peripheral portions of the end plates for insertion of the lead wires; insertion holes extending respectively obliquely from the openings of the peripheral portions; and a support groove provided on at least one of the insertion holes for supporting the lead wires.
According to a second aspect of the present invention, an axial flow blower device of the first aspect of the present invention is characterized in that a width of the insertion holes is larger than a width in the case where the plural lead wires are aligned in a row.
According to a third aspect of the present invention, an axial flow blower device of the first aspect of the present invention is characterized in that one of the insertion holes and the support groove communicating with the one insertion hole cooperatively form an acute angle or a substantially V-shape.
In these arrangements, the lead wires inserted through the openings advance along the insertion holes extending obliquely with respect to the peripheral portions, and by inclining the lead wires with a small angle, so that the lead wires are supported by the support groove provided on at least one of the openings.
REFERENCES:
patent: 3602001 (1971-08-01), Bauer et al.
patent: 3733502 (1973-05-01), Curtis et al.
patent: 3809503 (1974-05-01), Schlicker et al.
patent: 4184541 (1980-01-01), Beck et al.
patent: 4301275 (1981-11-01),
Minebea Co. Ltd.
Oliff & Berridg,e PLC
Robinson Daniel
Walberg Teresa
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