JPH0729199Y2 - Obstacle Sensing Device for Shatter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to an obstacle sensing device for a shielding shutter provided at an entrance of a building or the like.

[Prior Art] Conventionally, some shutters have an obstacle sensing device provided at a lower end portion of the shutter curtain.

As shown in FIGS. 8 and 9, in this sensing device, a plurality of movable bottom plates 14 are separated from each other in a lateral direction (direction of arrow A in FIG. 8) to a bracket 12 attached to a lower end portion of a shutter curtain 10. It is arranged. If the movable bottom plate 14 hits an obstacle when the shutter curtain 10 descends, the movable bottom plate 14 enters the bracket 12 (upward direction in FIG. 9), so that the limit switch 16 attached to the bracket 12 operates to drive the shutter curtain 10. A motor (not shown) is stopped.

When the movable bottom plate 14 is replaced during repair work, this sensing device is designed such that the bracket 12 is removed from the shutter curtain 10 and then the movable bottom plate 14 is withdrawn laterally with respect to the bracket 12.

Since this sensing device has a structure in which the movable bottom plate 14 is large and the limit switch 16 is activated only when the movable bottom plate 14 is vertically moved relative to the bracket 12, the horizontal direction during the downward movement of the shutter curtain 10 is detected. If an obstacle hits from the limit switch 16, the limit switch 16 cannot detect this.

[Problems to be Solved by the Invention] In consideration of the above facts, the present invention is capable of detecting obstacles from any direction during the operation of the shutter curtain, which can detect the obstacles. The purpose is to obtain.

[Means and Actions for Solving Problems] An obstacle sensing device for a shutter according to the present invention includes a holder attached to a lower end portion of a shutter curtain, and a hooking portion formed at a lower end of the holder and opening downward. A movable seat plate that is hung from the center of the latching part and is capable of swinging and ascending so as to project from the lower region of the latching part; And a detection switch that is pressed by the hanging portion when the plate swings or rises.

Therefore, in the present invention, when an obstacle hits the movable seat plate while the shutter is moving up and down, the movable seat plate swings or rises depending on the direction in which the obstacle hits (horizontal direction, downward direction or upward direction), and The hanging portion presses the detection switch arranged in the hanging portion to stop the operation of the shutter curtain. Therefore, as in the past, not only obstacles hit from below, but also obstacles in all directions are detected,
The shutter curtain can be reliably stopped.

[Embodiment of the Invention] FIGS. 1 and 2 show the vicinity of the lower end of a shutter according to the first embodiment of the present invention. A winding tightening portion 22A at the upper end of the holder 22 is connected to the winding tightening portion 20A at the lowermost stage of the slat 20 that constitutes the shutter curtain. The holder 22 has the same lateral dimension as the slat 20, and a semicircular groove 24 as a hooking portion is formed at the lower end over the entire area in the lateral direction (the direction perpendicular to the plane of FIG. 1). The lower end of the groove 24 communicates with the outside through a notch 26.

In the groove 24, a head portion 28A as a hanging portion for a plurality of movable seat plates 28 arranged side by side in the lateral direction is housed. The neck portion 28B immediately below the head portion 28A has a width dimension (a dimension in the left-right direction in FIG. 1) narrower than that of the head portion 28A, so that the movable seat plate 28 is formed.
Is swingable in the groove 24 in the direction of arrow B. As the swing angle increases, the head 28A is dimensioned so that it can be pulled out from the groove 24 as shown in FIG.

As shown in FIG. 1, the head portion 28A has an arc shape when viewed from the lateral direction, and the top surface 28C thereof corresponds to a cord-shaped rubber switch 30 as a detection switch attached to the holder 22. The rubber switch 30 is elastically held in the accommodation groove 24A formed further upward from the top of the groove 24, and the lower end surface corresponds to the head portion 28A. This rubber switch 30 has a pair of contact points 30A and 30B in a cylindrical cover 31 as shown in FIG.
Are placed through the rubber 30C, and when the head 28A abuts, the rubber
The conductors scattered in 30C are brought into close contact with each other to turn on the contacts 30A and 30B so that the relative movement between the movable seat plate 28 and the holder 22 can be detected.

As shown in FIG. 2, the rubber switches 30 are provided to face a plurality of movable seat plates 28, respectively, and these are connected in parallel by wires 32. Therefore, when the contact of any one of the rubber switches 30 is turned on, the wiring 32 detects this and sends a signal to a motor (not shown) to stop the drive of the shutter curtain 10.

Here, the rubber switch 30 has a head portion 28A vertically upward and a holder 22A.
This can be detected not only when the movable seat plate 28 moves relative to (direction of arrow C in FIG. 1) but also when the movable seat plate 28 swings by a predetermined amount or more (direction of arrow B). For this reason the head 28
The movable seat plate 28 has a protrusion 28D formed on both end portions of A.
It comes into contact with the rubber switch 30 when swinging.

As shown in FIG. 4, the rubber switch 30 and the wiring 32
A cylindrical cap 33 is put on the connection part with to protect the connection part, but this cap 33 has a notch 33A formed at a part corresponding to the contact 30B and a rubber switch 30 of the head 28A.
The detection sensitivity at the time of abutting against is not reduced.

The movable seat plate 28 has a pair of wings 34, 36 extending laterally from the neck 28B, and the tips of these wings 34, 36 are hanging parts 34A, 36A bent downward. . Therefore, when an obstacle comes into contact with these hanging parts 34A and 36A (see the arrow D direction and E direction), the movable seat plate 28 is swung in the arrow B direction so that the rubber switch 30 can detect this. ing. Also, when an obstacle comes into contact with the wings 34, 36 from above (in the direction of arrow F), the movable seat plate 28 similarly swings in the direction of arrow B so that it can be detected.

The hanging portion 38 is integrally formed on the lower portion of the neck portion 28B,
An accommodation groove 38A is formed on the bottom surface over the entire area in the lateral direction. A long rubber material 40 is housed in these housing grooves 38A. A part of the long rubber material 40 is a contact portion 40A that protrudes from the accommodating groove 38A and protrudes below the bottom surface of the hanging portion 38, and is used for cushioning at the time of contact.

The long rubber member 40 has a function of suspending a plurality of movable seat plates 28 from the holder 22 in an aligned state. That is, since the long rubber members 40 connect the adjacent movable seat plates 28, each movable seat plate 28 is moved to the second position by the elastic force of the long rubber members 40.
One of the movable seat plates arranged in the alignment shown in the figure
When an obstacle comes into contact with 28 and swings, the movable seat plate 28 with which the obstacle comes into contact can be swung to facilitate the detection of the rubber switch 30, and the adjacent movable seat plate 28 can also receive this movement. Impact can be absorbed by transmitting rocking force.

Further, when the lower surface of the movable seat plate 28 is viewed from below when the shutter curtain 10 is raised, the long rubber material 40 is long.
Since a plurality of movable seat plates 28 are connected to each other, the movable seat plates do not shift laterally and there is a sense of unity. The conventional movable bottom plate 14 shown in FIG. It was misaligned and gave a feeling of unevenness, but this is resolved and it becomes a balanced state.

Further, the long rubber member 40 prevents any of the movable seat plates 28 from swinging extremely large and prevents the movable seat plate 28 from being separated from the housing groove 24A, but at the time of maintenance maintenance, the long rubber member 40 holds the long rubber member 40. By removing the movable seat plate 28 from the holder 22 with elasticity, the connection between the movable seat plate 28 and the adjacent movable seat plate 28 is released, and the movable seat plate 28 is largely swung so that it can be easily removed from the holder 22 as shown in FIG.

Next, the operation of this embodiment will be described.

The shutter curtain 10 has an upper end (not shown) connected to a winding shaft, and the rotation of the winding shaft by a motor raises or lowers the shutter curtain 10. The holder 22 can be wound around the winding shaft at the maximum rise time, and since only the movable seat plate 28 having a short vertical dimension is exposed from the shutter case, the opening area at the time of the rise is not reduced.

Further, a case where the movable seat plate 28 comes into contact with an obstacle when descending will be described. When this movable seat plate 28 comes into contact with an obstacle directly below it, this obstacle presses the hanging portion 38 in the direction of arrow C, so that the head portion 28A comes into contact with the rubber switch 30 and the contact point 30A,
The drive motor is stopped because 30B is turned on. The plurality of movable seat plates 28 are arranged side by side in the lateral direction. However, even if any of the movable seat plates 28 comes into contact with an obstacle, they can move up and down substantially independently, so that the obstacles can be properly moved. Can be detected.

If the obstacle is not directly below the hanging portion 38, or if it is just below and the direction of contact with the hanging portion 38 is not vertical, the movable seat plate 28 is swung in the direction of arrow B. Therefore, when an obstacle comes into contact with one of the movable seat plates 28, the movable seat plate 28 swings and rotates, and the rubber switch 30 is similarly turned on to stop the motor.

As described above, when repairing the movable seat plate 28 or the rubber switch 30, as shown in FIG.
If it is removed from A, the movable seat plate 28 can be individually removed from the holder 22 by swinging it by the maximum angle. For this removal and mounting, the rubber switch 30 may be moved downward in FIG. 1 to overcome the mounting friction force and be removed from the housing groove 24A.
Fig. 1 It may be extracted in the direction perpendicular to the plane of the paper. In this way, the rubber switch 30 is simply attached by frictional force, and since there is no special fixing means, the number of parts is small, and mounting and unmounting are quick and easy.

Next, FIG. 5 shows a second embodiment of the present invention. In this embodiment, two rubber switches 30 are provided in the holder 22 so that this can be quickly detected when the movable seat plate 28 swings and rotates. In this embodiment, the hanging portion 38 of the previous embodiment is omitted.

Next, FIG. 6 shows a third embodiment of the present invention. In this embodiment, the long rubber members 40 are housed in the hanging parts 34A and 36A, respectively. With this, the same effect as that of the first embodiment can be obtained.

Further, FIG. 7 shows a fourth embodiment of the present invention. In this embodiment, the lengthy rubber member 40 of the first embodiment has a relatively short dimension, and is long enough to be hung between the adjacent movable seat plates 28. Therefore, the length of use of the long rubber material 40 can be saved.

It should be noted that instead of the rubber switch used in the above-mentioned embodiment, other long-sized detecting means such as a piezoelectric switch can be applied.

[Advantages of the Invention] As described above, the present invention is provided with the swingable movable seat plate for detecting an obstacle, so that the obstacle can be surely detected from any direction. It has an excellent effect.

[Brief description of drawings]

1 is a front view of a holder and a movable seat plate showing a first embodiment of the present invention, FIG. 2 is a perspective view of FIG. 1, and FIG. 3 is a perspective view showing a state where a long rubber material is removed. FIG. 4 is an exploded perspective view showing the structure of the connecting portion, FIGS. 5 to 7 are front and perspective views showing second to fourth embodiments of the present invention, and FIG. 8 is a conventional example. FIG. 9 is a front view showing the detector, and FIG. 9 is a sectional view taken along line IX-IX in FIG. 22 …… Holder, 24 …… Groove, 28 …… Movable seat plate, 30 …… Rubber switch.

Claims (1)

[Scope of utility model registration request] 1. A holder attached to a lower end portion of a shutter curtain, a hooking portion formed at a lower end of the holder and opened downward, and a hooking portion projecting from the center to the hooking portion. A movable seat plate which can be swung and raised and which is projected from a lower region of the hook portion; and a detection switch which is disposed in the hook portion and is pressed by the hook portion by the swing or lift of the movable seat plate. An obstacle sensing device for a shutter having.