JPH0137110Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a shutter obstacle sensing device used in the safety mechanism of an electric shutter.

When the slat curtain of an electric shutter is lowered, if an item is left on the floor directly under the curtain, or if a person accidentally inserts their toes, the items or toes may be damaged. There is a risk of an obstacle getting caught in the curtain and causing damage.In order to prevent this, the operating mechanism of the electric shutter is equipped with an obstacle detection device, and if the device detects an obstacle, In order to ensure safety, measures are taken to stop the lowering of the curtains or to reverse the curtains and raise them.

Therefore, the present invention relates to an improvement on the conventional structure of this type of obstacle sensing device. Micro switches are built in at multiple locations in the longitudinal direction to mechanically detect obstacles.

Specifically, the assembly type seat board consists of a decorative cover with an approximately U-shaped cross section attached to the lower end of the slat, a movable bottom plate suspended from the lower surface of the decorative cover, and a micro switch installed inside the decorative cover. The decorative cover has a groove opening extending all the way through the lower surface in the longitudinal direction, and a movable bottom plate suspended from the groove opening has a hat-shaped cross section that opens upward. The structure is such that the floating of the movable bottom plate is detected by a micro switch.

By the way, in the conventional structure of this type of sensing device, a micro switch built into the assembly seat plate is attached to the side of a holding plate suspended from the ceiling inside the decorative cover, and the actuator is moved. Since the switch is held in contact with the floor of the bottom plate, in order to prevent the lead wires of the switch from hanging into the interior of the decorative cover, fold up any loose wires and use duct tape, etc. It was a hassle to have to fix it properly. Another disadvantage is that if the fixed parts of the packing tape come loose due to deterioration over time, the hanging parts will become caught between the decorative cover and the movable bottom plate, causing poor continuity, which can easily lead to malfunctioning of the detection. It was hot.

The present invention has been made to eliminate the above-mentioned drawbacks, and the purpose of the present invention is to facilitate the wiring of lead wires for microswitches,
Another object of the present invention is to provide an obstacle sensing device for a shutter that can reliably accommodate lead wires.

As a means to achieve this object, the present invention provides a decorative cover 2, 14, 16 which is provided at the lower end of a slat curtain of a shutter over substantially the entire width thereof, and has a groove opening 5 extending all the way through the lower surface in the longitudinal direction. a movable bottom plate 8 suspended vertically from the groove opening 5; a retaining plate 6 suspended along the longitudinal direction from the ceiling surface of the decorative covers 2, 14, 16; A plurality of micro-switches 9 are detachably attached to a plurality of locations along the longitudinal direction of the side surface of the switch, each actuator 10
a micro switch 9 that is in contact with the bottom surface of the movable bottom plate 8, and a partition plate 2f that is formed on the ceiling surface of the decorative cover 2, 14, 16 to face the micro switch 9 and protrude along the longitudinal direction. , 14b, 16a, and an insertion/accommodating space 11 for a microswitch lead wire.

The present invention will be explained below based on the illustrated embodiments.

First Embodiment In the sensing device of the embodiment shown in FIGS. 1 and 2, the assembly type seat plate 1 is made of aluminum material, and the decorative cover 2 constituting the seat plate 1 is made of slats. It is formed integrally with a vertical plate 4 connected to the lower end of the plate 3.

Therefore, the decorative cover 2 that passes through the entire length in the longitudinal direction
consists of an upper plate 2a, both side plates 2b in the width direction, lower plates 2c on both sides with groove openings 5 opened in the middle, and lower plates 2.
The side plate 2b is formed into a substantially U-shaped cross section by the hem 2d extending downward from the side plate 2b, and a stopper partition plate 2e is provided on one side of the lower surface of the upper plate 2a in the width direction.
is provided to protrude downward, and on the opposite side thereof, a partition plate 2f having an L-shaped cross section and also serving as a stopper is provided to protrude downward.

Furthermore, holding pieces 6 having an L-shaped cross section are installed at multiple locations (usually around 10 locations) in the longitudinal direction inside the stopper partition plate 2e on the lower surface of the upper plate 2a, so that the upper plate can be tightened by tightening the mounting screws 7. 2a, and a detection micro switch 9 is provided on the side of each holding piece 6.
is installed.

Next, the movable bottom plate 8, which has a hat shape with an upwardly open cross section, has upward flanges 8a overhanging on both sides of the bottom in the width direction, and the hat-shaped flange 8b is attached to the lower plate of the decorative cover 2. In the illustrated assembled state in which the movable bottom plate 8 is inserted onto the groove opening 5, the movable bottom plate 8 is suspended in the groove opening 5.

However, in the levered state, the flange 8a of the movable bottom plate 8 can slide up and down along the inner surface of the hem 2d of the decorative cover 2, and the actuator 10 formed on the lower surface of the micro switch 8
is in contact with the floor surface.

Further, in the shelf-shaped space 11 partitioned by the partition plate 2f, as shown in FIG. The opening is closed by press-fitting a rubber holding member 13 into the appropriate position, thereby preventing the lead wire 12 from coming off.

The operation of the sensing device of the embodiment configured as described above is such that, if an obstacle occurs below the seat plate 1 while the curtain slats 3 are being lowered, the movable bottom plate 8 will hit the obstacle and the lowering of the curtain will be interrupted. In order to be blocked, the movable bottom plate 8 relatively rises inside the decorative cover 2 and pushes up the actuator 10, which causes the micro switch 9 to output a detection signal, and after that, both sides of the movable bottom plate 8 The relative rise is stopped at the point where the brim 8b touches the lower end of the stopper partition plate 2e and the lower end of the partition plate 2f of the decorative cover 2, thereby protecting the switch 9.

However, in the above-mentioned device, when wiring the switch lead wire 12, the lead wire 12 is connected to the partition plate 2f.
Wiring work is easy, as it is a simple operation of inserting the lead wire 12 inside and then press-fitting the holding member 13. Also, when the lead wire 12 is stored, it is partitioned off from the outside, so the lead wire There is no risk that the wire 12 will be damaged or affected by aging.

Second Embodiment (See FIG. 3) In the device configuration of this embodiment, two parallel partition plates 14b project obliquely downward from the inner corner edge of the stopper partition plate 14a on one side of the decorative cover 14. is provided in the longitudinal space between both partition plates 14b,
The lead wire 12 is inserted and housed, and the lead wire 12 is prevented from coming off by a similar holding member 15.

Even with such a configuration, the wiring of the lead wire 12 is easy as described above, and the wiring of the lead wire 1
2 is definitely protected.

Third Embodiment (See FIG. 4) In the device configuration of this embodiment, two parallel downward partition plates 16a are provided near the center of the ceiling surface of the decorative cover 16, projecting in the longitudinal direction. The lead wire 12 is inserted between the two partition plates 16a, and a cover 17 made of a long plate such as a plastic plate is placed between the lower ends of the two partition plates 16a. It's stopped.

Even with such a configuration, the wiring of the lead wire 12 is easy and does not sag.

As described above, according to the shutter obstacle sensing device according to the present invention, the decorative covers 2, 14, 1
Partition plates 2f, 14b, 16a are formed protruding from the ceiling surface of 6, facing each of the plurality of micro-switches 9, and an insertion storage space 11 for the micro-switch lead wire is provided along the partition plate. The lead wires of each micro switch can be bundled and stored inside the narrow and long decorative cover.
The wiring work is facilitated, there is no sagging, and the protection of the lead wires is ensured.

Further, according to the present invention, a plurality of micro-switches 9 are detachably provided on the side surface of the holding plate 6 suspended from the ceiling surface of the decorative cover, and the actuators of each micro-switch are connected to grooves on the bottom surface of the decorative cover. Since they are brought into contact with the bottom surface of the movable bottom plate 8 which is vertically movably suspended in the opening 5, the mounting position of each micro switch can be moved up and down somewhat along the side surface of the holding plate 6 in accordance with the moving distance of the movable bottom plate 8. It has the effect that it can be adjusted and the reliability of its operation can be easily adjusted.

Furthermore, even if the movable bottom plate 8 is tilted, each microswitch 9 is protected by the lower edge of the holding plate 6, and is effectively prevented from being damaged.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of an obstacle sensing device for a shutter showing one embodiment of the present invention, Fig. 2 is a partial side view of Fig. 1, and Fig. 3 is a decorative cover main body showing another embodiment. FIG. 4 is a side view of the main part of the decorative cover showing another embodiment. 1... Seat board, 2, 14, 16... Decorative cover,
2f, 14b, 16a... Partition plate, 5... Groove opening, 8... Movable bottom plate, 9... Micro switch,
12... Lead wire.

Claims (1)

[Scope of Claim for Utility Model Registration] Decorative covers 2, 14, 16 provided at the lower end of the slat curtain of the shutter over substantially the entire width thereof, and having a groove opening 5 extending all the way through the lower surface in the longitudinal direction.
a movable bottom plate 8 suspended vertically from the groove opening 5; a retaining plate 6 suspended along the longitudinal direction from the ceiling surface of the decorative covers 2, 14, 16; A plurality of micro-switches 9 are detachably attached to a plurality of locations along the longitudinal direction of the side surface of the switch, each actuator 10
a micro switch 9 that is in contact with the bottom surface of the movable bottom plate 8, and a partition plate 2f that is formed on the ceiling surface of the decorative cover 2, 14, 16 to face the micro switch 9 and protrude along the longitudinal direction. , 14b, 16a, and an insertion storage space 11 for a microswitch lead wire.