JPH07103760B2 - Shutter obstacle detector - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a shutter obstacle detection device used for ensuring safety when a shutter curtain descends in an electric shutter installed at a doorway or a window of a building.

[Conventional technology]

As this kind of shutter obstacle detection device, for example,
55-110695 and JP-A-63-167877 proposed by the present inventor are proposed.

According to these, a pair of opposing ridges are fitted into the receiving groove by providing a pair of opposing ridges at the lower end of the end slat and providing a receiving groove for the opposing ridge at the upper end of the long elastic switch. As a result, the long elastic switch is fitted and attached so as to project downward from the end slat.

[Problems to be Solved by the Invention]

According to these, when there is an obstacle, the long elastic switch compresses and energizes the current, so that it can be detected, while it is not necessary to detect it as an obstacle, for example, a pebbles or the like. Even if small foreign matter is present,
Detecting this as an obstacle, the motor stops due to the energization just before the completion of the shutter curtain descent, and the descent of the shutter curtain stops with a slight gap at the lower end, which may impair the airtightness and watertightness. In addition, if an alarm is set to sound when an obstacle is detected, the alarm is activated even though the alarm is not supposed to be an obstacle, which is complicated. .

The present invention has been made in view of such circumstances, and the problem to be solved is that it does not detect small foreign matters such as the above-mentioned pebbles as much as possible, while making it possible to reliably detect obstacles. A shutter obstacle detecting device is provided.

[Means for Solving the Problems]

In accordance with the above problems, the present invention secures a two-step operation range of the primary elastic switch and the secondary compression of the long elastic switch, and detects an obstacle that should be originally detected by the secondary compression. The present invention is designed to avoid the detection of small foreign matters as much as possible, that is, in the present invention, a pair of upper and lower strip-shaped conductive portions are arranged facing each other in a series in the longitudinal direction within the elastic hollow insulating portion. A long elastic switch including a switch main body having a shape-retaining property for suppressing partial compression due to a foreign substance, a connecting neck protrudingly arranged above the switch main body, and a loose fitting base arranged via the connecting neck. And a space up to the upper end receiving wall in the base loose fitting portion of the end slat, the end slat having an upper end receiving wall and a downwardly opening C-shaped base loose fitting portion. The loose fit base is loosely fit and accommodated by A long elastic switch is vertically movably mounted on the lower surface of the end slat by suspending and supporting the switch main body in a downwardly projecting manner through a section, and the primary upward movement of the long elastic switch with respect to an obstacle, The present invention relates to a shutter obstacle detection device characterized by setting a two-step operation range of secondary compression, and this is the means for solving the above problems as the gist of the invention.

〔Example〕

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in more detail with reference to the drawings showing the following embodiments. 1 is an electric shutter, 2 is a shutter box thereof, 3 is a shutter curtain wound and housed in the shutter box 2 by a motor (not shown), 4 is a shutter slat that constitutes the shutter curtain 3,
Reference numeral 5 is an elevating guide frame of the shutter curtain 3, and 6 is a lower frame between the left and right elevating guide frames 5.

Reference numeral 7 is an end slat disposed at the lower end of the shutter curtain 3, and the end slat 7 is a base loose fitting portion below.
It is configured by an aluminum extruded material having a continuous hollow cross section including 13 and the base loosely fitting portion 13 includes a pair of protrusions 14 and 1 in which lower ends of side walls of the end slats 7 are bent in opposite directions.
It is assumed that an opening 15 is provided between the four side walls and an upper end receiving wall 16 is provided between the side walls in a transversely extending manner, and in this example, the section has a substantially C-shaped downward section having a height width of 5 mm. is there.

The end slats are further equipped with box-shaped blocks 8 made of synthetic resin at both ends thereof, and at least one of the blocks 8 is provided with the light emitting device 10 and the dry battery 11 and is located in the elevating guide frame 5. An infrared light emitting element 9 for emitting infrared light to the infrared light receiving element 12 is provided above the end portion.

Reference numeral 17 denotes a long elastic switch mounted on the end slat 7. The long elastic switch 17 is made of, for example, EPDM, and the switch main body 21, the connecting neck portion 22, and the loose fitting base portion 23 are integrally formed into a long length as a whole. It is configured as a co-molded product.

The switch main body 21 has a pair of upper and lower parts in a series in the longitudinal direction in the elastic hollow insulating portion 18 made of EPDM, in which metal powder is mixed to impart conductivity, and band-shaped conductive portions 19, 20 made of EPDM are also arranged facing each other. However, the material has elasticity, longness, shape, and the like so as to have a shape-retaining property that suppresses partial compression due to small foreign matter.

The connecting neck portion 22 is arranged so as to project upward in the width thick solid band shape at the center position in the width direction of the upper surface of the switch body 21, and the loose fitting base portion 23 is provided with the thick solid plate through the connecting neck portion 22. And is arranged so as to project in the width direction from the connecting neck portion 22.

In the long elastic switch 17 of this example, the strip-shaped conductive portion 1
9, 20 are vertically spaced from each other by 2.6 mm, the loose fitting base portion 23 has a thickness of 1.8 mm, and the connecting neck portion 22 has a height approximately twice the thickness of the loose fitting base portion 23. There is.

The long elastic switch 17 configured as described above is attached to the end slat 7 after being waterproofed at both ends thereof and also provided with a sealing measure to contribute to its shape retention.

That is, the free-slave base portion of the end slat 7 is movable up and down in the space up to the upper end receiving wall 16 in the free-slip base portion 13 of the height of 5 mm.
23 is loosely accommodated and the switch main body 21 is suspended and supported through the connecting neck portion 22 so as to project downward.
A long elastic switch 17 is mounted on the lower surface side so as to be movable up and down, and the strip-shaped conductive portions 19 and 20 are connected to the light-emitting device 10 in the block 8 at their ends via lead wires. I am doing it.

In the figure, reference numeral 24 is a recessed groove provided so as to reduce the elasticity of the elastic hollow insulating portion 18 in order to properly compress the switch body.

Therefore, in this example, when there is an obstacle to be detected, such as a child under the window putting his / her hand on the lower frame 6, the long elastic switch 17 causes the base loose fitting portion 13 to move. Height 5 mm
3.2mm excluding the wall thickness 1.8mm of the loose fitting base 23 from above
Next, it rises, and then it is secondarily compressed so that the strip-shaped conductive parts 19 and 20 with 2.6 mm intervals come into contact with each other. Therefore, when there is an obstacle with a total height of 6 mm or more, depending on the thickness of the obstacle. A two-step operation range is set by the primary rise and secondary compression of the long elastic switch 17, and the detection is surely performed.

On the other hand, when there is a small foreign matter such as a small stone of about 6 mm or less, the long elastic switch 17 causes a primary rise according to the shape keeping property of the long elastic switch 17 for suppressing the partial compression. Even if it is performed, the secondary compression in which the strip-shaped conductive portions 19 and 20 come into contact with each other is not reached. Therefore, the shutter curtain 3 completes the descent without the contact of the strip-shaped conductive portions 19 and 20, and the long elastic switch 17 is airtight. As a material, the entire airtightness and watertightness between the lower frame 6 and the lower frame 6 are secured, and the formation of a gap is substantially prevented.

Although the illustrated example is as described above, the elastic hollow insulating portion of the long elastic switch is made of rubber, synthetic rubber, synthetic resin, or the like as long as it has shape retention that suppresses partial compression by small foreign matter. Further, a thin metal plate can be used for the belt-shaped conductive portion, and further, for example, the connecting neck portion and the loose fitting base portion are made hard so as to reduce the frictional resistance with the loose fitting portion of the base portion as much as possible. It may be integrated with the main body by simultaneous molding or retrofitting.

When mounting the long elastic switch on the end slat, the up and down movable range of the long elastic switch is set so that the two-step operation range of the rising thereof and the compression thereof are set secondarily.
It is preferable that the distance is equal to or more than the facing distance of the strip-shaped conductive portion, and if the facing distance exceeds the vertically movable range, detection of an obstacle will be delayed by that amount even if the two-step operating range is set. Therefore, it is preferable to avoid it. Note that this two-step operating range is generally set to about 1 cm or less so that a person can put his hand on a window shutter, so that the range is set as the detection height. Is good.

In implementing the present invention, including the above, each specific material,
The shape, structure, size, number, relationship between these, addition to these, etc. can be variously modified without departing from the gist of the invention, and are not limited to those in the above embodiment.

〔The invention's effect〕

As described above, the present invention has a switch main body having a shape-retaining property of suppressing partial compression by small foreign matters by arranging a pair of upper and lower strip-shaped conductive portions in a longitudinal series in the elastic hollow insulating portion so as to face each other, A long elastic switch having a connecting neck portion projectingly arranged above the switch body and a loose fitting base portion arranged via the connecting neck portion; and a downward substantially C-shaped bottom opening having an upper end receiving wall. And an end slat provided with a base loose fitting portion, and the free fitting base portion is loosely fitted and accommodated in the base loose fitting portion of the end slat so as to be vertically movable in a space up to the upper end receiving wall, and through the connecting neck portion. A long elastic switch is vertically movably mounted on the lower surface side of the end slat by suspending and supporting the switch main body in a downward projecting manner, and the long elastic switch is first raised and secondly compressed against an obstacle. Set the 2-step operating range of Therefore, it properly detects obstacles in the two-step operating range or more and secures the safety of the shutter curtain lowering, while avoiding detection of small foreign matter in the two-step operating range or less as much as possible. It is possible to provide a shutter obstacle detection device capable of ensuring the overall airtightness and watertightness due to the descent of the shutter curtain.

[Brief description of drawings]

The drawings show an embodiment, FIG. 1 is a front view of an electric shutter, FIG. 2 is a perspective view showing a structure of an end portion of an end slat, FIG. 3 is a sectional view of the same, and FIG. The top view which shows the relationship with a vertical frame, FIG.5 (A) (B) is a partially expanded sectional view which shows the relationship between an end slat and a long elastic switch. 7 …… End slat, 18 …… Elastic hollow insulation 13 …… Free fitting storage, 19,20 …… Band-shaped conductive part 15 …… Opening, 21 …… Switch body 16 …… Upper side receiving wall, 22 …… Connection neck 17 …… Long elastic switch, 23 …… Free fitting base

Claims (2)

[Claims] 1. A switch body in which a pair of upper and lower strip-shaped conductive portions are arranged facing each other in a series in a longitudinal direction in an elastic hollow insulating portion so as to have a shape-retaining property for suppressing partial compression by small foreign matter, and the switch. A long elastic switch provided with a connecting neck portion projectingly arranged above the main body and a loose fitting base portion arranged via the connecting neck portion, and a base portion having an upper end receiving wall and having a downward opening and a substantially C shape. An end slat provided with a loose fitting portion, and a loosely fitting base portion is loosely fitted and accommodated in a loose fitting portion of a base portion of the end slat so as to be vertically movable in a space up to an upper end receiving wall, and a switch body is provided through a connecting neck portion. A long elastic switch is vertically movably mounted on the lower surface side of the end slat by suspending and supporting the long elastic switch downwardly, and the long elastic switch is raised to an obstacle by a primary lifting and a secondary compression. The feature is that the step operating range is set. Shutter obstacle detection apparatus according to. 2. The switch body of the long elastic switch is formed by simultaneously molding an elastic hollow insulator made of rubber or synthetic rubber and a belt-shaped conductor made of conductive rubber or synthetic rubber. Shutter obstacle detection device.