JP2549546Y2 - Structure of electric shutter drive unit - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of an electric shutter driving section which can open and close a shutter by driving a winding mechanism.

[0002]

2. Description of the Related Art Generally, an electric shutter is provided with a shutter winding drum 11 as shown in FIGS.
Is connected to an electric motor 13 via a transmission system 12, and a coil spring 15 is provided between the drum 11 and the fixed shaft 14.
Is provided. In this case, the electric shutter driving unit is the driven sprocket 1 of the transmission system 12.
2A, the driving member 16 is fixed with a bolt / nut 17, the driving member 16 is rotatably supported on a counter-shaft 14A coaxial with the fixed shaft 14, and provided on the driving member 16. The engaging pin 18 is engaged and connected to the drum 11.

[0003]

However, the driving member 16 is usually made of casting, and the counter shaft 14
A must have a structure that is supported by a collar 16A as a bearing member.
8 has to be connected and held by means such as caulking, so that the structure becomes complicated and the manufacturing cost is increased.

[0004]

SUMMARY OF THE INVENTION The present invention has been made on the basis of the above circumstances, and aims to provide a structure of an electric shutter driving unit capable of reducing the number of parts, facilitating manufacture and assembly, and reducing costs. Things.

[0005]

Therefore, in the present invention,
As is apparent from the illustrated embodiment, the shutter
In the structure of the electric shutter-driving section, the winding drum (11) is linked to a driven sprocket (12A) axially supported opposite to the drum (11) via a driving member. The drive member has a drive arm (3A) formed by bending a metal plate into a substantially U-shape, and an intermediate piece of the drive arm (3A) has the driven sprocket (12).
A) is detachably fixed concentrically to the opposing plate surface portion via a fixture (2), and the claw portions (3B) integrally formed at both ends of the driving arm (3A) are provided with the claw portions (3B). ) Is inserted into and engaged with the engaging hole (11A) formed at the opposing position of (1).

[0006]

Therefore, in such a configuration, the drum (11)
The drive arm (3A) engaging with the bearing member (3A) is formed integrally with the drive member (3), and unlike the case of casting, a simple processing method such as sheet metal processing can be adopted, and assembling with the bearing member (1). Is easy, the number of parts is small as a whole, the cost can be reduced, and the productivity is improved.

[0007]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.
This will be specifically described. The same members as those in the above-described conventional example are denoted by the same reference numerals, and description thereof is omitted. As shown in FIGS. 1 and 2, the structure of the electric shutter driving unit in this embodiment is the driven sprocket 1 of the transmission system 12.
A cylindrical bearing member 1 is concentrically fixed to 2A with a bolt fixing tool 2, and this is rotatably supported on a counter shaft 14A. A plate-shaped driving member 3 is clamped between the driven sprocket 12A and the bearing member 1 by the fixing tool 2. The drive member 3 is formed by bending a metal plate into a substantially U-shape to form drive arms 3A on both sides thereof, and a center hole 3 formed in an intermediate piece 3C.
E is externally inserted into the counter shaft 14A, and the fixture 2 is inserted and fixed through a fixing hole 3D formed of a small hole around the center hole 3E. The drive arm 3A has a shape extending in the axial direction by bending, and is integrally provided with claw portions 3B at both ends for engaging with engagement holes 11A formed in the drum 11. ing.

In the above embodiment, reference numeral 4 denotes a base member to which the base end of the counter shaft 14A is welded, which is attached to the inner surface of a side plate of a shutter case (not shown). . Further, in this embodiment, the fixture 2 is screwed to the flange 1A of the bearing member 1 in a state where the driven sprocket 12A is overlaid on the drive member 3,
Although the driven sprocket 12A, the driving member 3, and the bearing member 1 are integrally fixed, as in the embodiment shown in FIG. 3, the driven sprocket 12A and the driving member 3 are overlapped with the flange 1A therebetween. The fixing member 2 may be fixed integrally by screwing the fixing member 2 to the bearing member 1 and the driving member 3. Also, as in the embodiment shown in FIG. , The nut 2A may be screwed into the bolt fixing tool 2 to fasten and fix the bolt fixing tool 2.

In such a configuration, the drive arm 3A can be formed integrally with the drive member from a metal plate member by a simple process such as bending, so that unlike the conventional casting, It is easy to manufacture, the number of parts is reduced,
Assembly is also simplified.

[0010]

According to the present invention, as described in detail above, a driving mechanism in which a shutter winding drum and a driven sprocket opposed thereto are formed by bending a metal plate into a substantially U-shape. -Since the driving arm is integrally connected to the driving member through the driving member integrally having the arm, the driving arm is integrally formed with the driving member, and unlike the case of casting, a simple processing method such as sheet metal processing. Can be easily assembled to the bearing member, and as a whole, practical effects such as a reduced number of parts, a reduction in cost, and an improvement in productivity can be obtained.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional side view showing a main part of an embodiment of the present invention.

FIG. 2 is also an exploded perspective view.

FIG. 3 is a longitudinal sectional side view showing a main part of another embodiment.

FIG. 4 is a longitudinal sectional side view showing still another embodiment.

FIG. 5 is a partially longitudinal side view showing a conventional example.

FIG. 6 is a longitudinal sectional side view showing a main part of the conventional example.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Bearing member, 1A flange part 2 Fixture, 2A nut 3 Drive member, 3A Drive arm, 3B
Claw part 4 Base member 11 Drum, 11A Engagement hole 12 Conductive system, 12A Driven sprocket 14A Counter shaft

Claims (1)

(57) [Scope of request for utility model registration] 1. A drum for rewinding a shutter.
And a driven sprocket (12A) axially supported in opposition to the drum (11) and an electric shutter-drive unit in which the drive sprocket is driven by a metal plate. A driving arm (3A) formed by bending the body into a substantially U-shape;
The intermediate piece of A) is detachably fixed to the opposite plate surface of the driven sprocket (12A) concentrically via the fixture (2), and is integrally formed at both ends of the drive arm (3A). The electric shutter drive section, wherein the claw portion (3B) is inserted and engaged in an engagement hole (11A) formed at a position facing the drum (11).