JPH048228Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) This invention relates to a shutter equipped with a shaft-mounted shutter motor, and in particular, the part where the hanging slat of the shutter curtain is attached to the wheel for driving the curtain. It is related to the structure of

(Prior Art) A method using a shaft-mounted shutter motor has been proposed as an opening/closing drive mechanism for an electric shutter.

Here, the conventional general structure of the drive mechanism of a shutter using this type of shaft-mounted motor will be described.

The shutter motor is integrally mounted on a fixed shaft for winding up the curtain, and an annular internal toothed wheel that rotates to open and close around the same axis is provided in the middle of the fixed shaft. The internally toothed wheel is formed so as to mesh with a pinion of the output shaft of the motor and to be directly rotationally driven.

By driving the internal toothed wheel in forward and reverse rotation, the shutter curtain is wound or rewound around the outer circumference of the internal toothed wheel, thereby opening and closing the shutter.

(Problem to be Solved by the Invention) However, in recent years, attempts have been made to retrofit the shaft-mounted motor described above onto the shaft of an existing lightweight manual shutter to improve the lightweight manual shutter into an electric shutter. There is.

This manual lightweight shutter, as is well known,
A plurality of winding drums are installed at multiple locations on the outer periphery of the fixed shaft, and the outer periphery of each winding drum is connected by a stay, and both ends of the coil spring fitted on the fixed shaft are attached to the fixed shaft. The shutter curtain is fixed to a winding drum, and the winding drum, to which the upper end of the shutter curtain is fixed, is spring-biased so that the winding drum can be easily rotated manually.

In order to attach an internal toothed wheel like the one described above to the fixed shaft of such a manual lightweight shutter by retrofitting, the internal toothed wheel must be split in half, and ear blocks should be protruded from the top and bottom of the opposing surface. It is convenient to connect the ear blocks by aligning each half of the internal toothed wheel at a position around the outer periphery of the stationary shaft, away from the take-up drum and coil spring. After the internal toothed wheel is attached to the outer periphery of the fixed shaft in this way, the suspension slat at the upper end of the shutter curtain is tightened and fixed to the outer periphery of the winding drum and the end face of the ear block using mounting bolts. .

However, with this type of bolt-fastening structure for the hanging slat, the mounting bolt that passed through the mounting hole of the slat was simply screwed into the screw hole drilled in the end face of the ear block and tightened. (a) The suspension slats are easily damaged due to the difference in level between the end face of the ear block and the outer peripheral surface of the internal toothed wheel, and (b) The suspension slats are likely to shift and generate noise, etc. A problem like this was occurring.

In other words, at the lower limit of the lowering movement when the lower end of the curtain touches the floor, and at the upper limit of the rising movement when the lower end of the curtain hits the magsa, the brake is applied to the output shaft of the motor, causing the mounting bolts to tighten. Stress due to reaction force is intensively applied to the fastening part.

However, because the contact area between the end face of the ear block and the suspension slat is small and there is a step between the outer peripheral surface of the internal toothed wheel, an overload is applied to the plate surface around the mounting hole of the suspension slat during an impact. As a result, cracks occur on the plate surface, and metal fatigue accumulates, leading to slat failure.

Furthermore, due to similar causes, the suspension slats tend to shift, resulting in vibrations such as horizontal and vertical vibrations in the suspension slats, producing noise.

Therefore, the present invention aims to eliminate the risk of loosening or damage of the attachment part of the hanging slat to the internal toothed wheel when retrofitting a manual lightweight shutter to an electric shutter using a shaft-mounted shutter motor, and to eliminate noise. An object of the present invention is to provide a shutter curtain mounting device that can prevent the radiation of.

(Means for solving the problem) In order to achieve the object, in the configuration of the present invention, a thin plate-like cover made of a substantially half-cylindrical body having a diameter circumscribing the end face of the ear block is In addition to surrounding the wheel, the cover is sandwiched between the end surface of the ear block and the back surface of the tip of the slat, and is fastened and attached to the ear block using bolts or other fittings. There is.

(Function) From this structure, based on the tightening of the fixture,
The back surface of the hanging slat is clamped to the cover over a wide area, and as a result, the clamping surface absorbs the impact load at the limit of lifting and lowering, thereby preventing damage to the slat and also reducing the wide plate surface of the cover. can reduce noise dissipation.

(Example) Hereinafter, the configuration of the present invention will be specifically described based on two illustrated examples.

(a) First embodiment (see Fig. 1) Fig. 1 shows an internally toothed wheel 2 of a suspension slat 1a of a shutter according to an embodiment equipped with an outer curtain 1.
As shown in the figure, the shutter motor 3 is integrally mounted in the middle of a fixed shaft 4 for winding up the curtain.

Therefore, the internal toothed wheel 2 is attached to the fixed shaft 4
The wheel is formed into a half-split shape so that it can be put in and taken out from the side, and an ear block 2a is formed overhanging on the outer peripheral surface on the dividing line, and both halves of the wheel are secured with through bolts 5. are combined together.

This internal toothed wheel 2 rotates to open and close without centering, but in reality it consists of two idlers that are supported by a pinion (not shown) on the output shaft of the motor 3 and two fixed shafts (not shown) on the same circumferential line. The pinion is held concentrically with the shaft 4 by engaging internally with the internal teeth 2b.

Incidentally, a bolt hole 7 into which a mounting bolt 6 (described later) as a mounting tool is screwed is formed in the end surface 2c of the ear block 2a.

Next, circumscribing the end surface 2c of the ear block 2a,
It is surrounded by a cover 8 made of a thin plate, and this cover 8 is made of a roughly half-shaped hard cylinder having a longitudinal notch in the axial direction, and the notch has an arc slightly narrower than 180°. It's been dropped.

Incidentally, a round hole 8a into which the mounting bolt 6 is inserted is formed at a position of the cover 8 in contact with the ear block 2a.

On the other hand, a mounting hole 1b into which a mounting bolt 6 is inserted is formed near the center of the suspension slat 1a.

Therefore, the suspension slat 1a is connected to the internal toothed wheel 2.
In order to install the ear block 2a, the mounting bolt 6 is passed through the mounting hole 1b of the suspension slat 1a and the round hole 8a of the cover 8 through the washer 9 and spring washer 10, and then screwed into the bolt hole 7 of the ear block 2a. If,
Tighten.

In the embodiment of the shutter configured as described above, when the shutter motor 3 is started and rotated in the winding direction (or unwinding direction), the wheel 2 is driven by the pinion of the output shaft and winds up. It rotates in direction A (or unwinding direction B), thereby causing the curtain to move upward (or downward).

By the way, even if the motor 3 is braked at the lower limit or upper limit of the curtain and a reaction impact stress is generated between the wheel 2 and the slats 1a, the slats 1a do not spread over a wide area on the circumferential surface of the cover 8. Since the slats 1a are crimped, no large external stress is applied to the plate surface of the slats 1a, thereby preventing cracks from occurring in the suspension slats 1a or vibrations in the suspension slats 1a. Furthermore, there is no risk of metal fatigue remaining on the plate surface, noise generation is reduced, and noise radiation is absorbed to some extent by the plate surface of the cover 8.

(b) Second embodiment (see Fig. 2) Fig. 2 is an isolated perspective view of the main parts of the shutter of the embodiment in which the curtain 1 is assembled inwardly. The members are exactly the same as those in Example 1, except that when installing the hanging slat 1a,
It is installed with the front and back reversed.

Therefore, in this case, a floating space corresponding to the thickness of the slat is generated between the plate surface of the slat 1a and the cover 8, so when inserting the mounting bolt 6, the bolt 6 must be inserted into the mounting hole. After passing through 1b,
Insert into the round hole 8a of the cover 8 via the spacer 11.

Note that the functions and effects in this example are the same as those in the first example.
This is exactly the same as the shutter in the embodiment.

(Effects of the invention) As described above, according to the shutter curtain mounting device according to the invention, the elongated cover made of a substantially half-cylindrical body is circumscribed and surrounded by the ear block of the curtain driving wheel. Since the cover is configured to act as a lining for the suspension slat, the rigidity of the attachment part of the suspension slat is reinforced, preventing damage and deterioration of the slat, and also helps reduce noise. This has the effect of improving the durability and usability of a shutter curtain having this type of shaft-mounted motor.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view of a curtain attachment part of a shutter curtain attachment device showing a first embodiment of the present invention, and FIG. 2 is a similar exploded perspective view showing a second embodiment of the invention. . DESCRIPTION OF SYMBOLS 1... Shutter curtain, 1a... Hanging slat, 2... Internal gear wheel, 2a... Ear block, 2c... End face, 3... Shutter motor, 6
...Mounting bolt as a fixture, 8...Cover.

Claims (1)

[Scope of Claim for Utility Model Registration] An internal toothed wheel that is driven by a pinion of the output shaft of a shaft-mounted shutter motor to open and close is formed into a half-split shape, and overhang molded on each outer peripheral surface on the dividing line. joining the ear blocks together, and fastening the hanging slats of the shutter curtain to the end faces of the joined ear blocks;
In a shutter curtain mounting device having a fixed structure, a thin plate-shaped cover made of a substantially half-cylindrical body having a diameter circumscribing the upper and lower end surfaces of the ear block that protrudes vertically and faces each other is attached to the inside of the shutter curtain. A shirt that surrounds the tooth wheel and is integrally fastened and attached to the ear block with a mounting tool, with the cover sandwiched between the end face of the ear block and the back surface of the slat. Attachment device for tar curtain.