JP2543478Y2 - Shutter safety device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shutter safety device that operates to avoid a shutter curtain against an obstacle when an obstacle is detected below the lower end surface of the shutter curtain.

[0002]

2. Description of the Related Art As this kind of shutter safety device,
A seat plate switch is provided at the lower end of the shutter curtain as obstacle detection means, and an obstacle signal is transmitted from a transmitter similarly provided at the lower end of the shutter curtain to a receiver provided on the building side, and the shutter signal is used by the obstacle signal. By stopping and reversing the curtain raising / lowering drive motor to raise the shutter curtain,
2. Description of the Related Art There is known a shutter curtain that operates to avoid an obstacle.

Here, in order to stop the shutter curtain at the lower limit position, the lower limit switch is operated shortly before the shutter curtain reaches the lower limit position, and the lower limit switch is operated, and When the board switch detects the floor surface as an obstacle and an obstacle signal is issued, stop control of the drive motor is performed. In addition, in preparation for a case where the seat plate switch does not operate due to the consumption of the battery or the like, a timer control for forcibly stopping the drive motor after a predetermined time has elapsed after the operation of the lower limit switch is performed.

[0004]

By the way, in the above-mentioned conventional shutter safety device, when the lower end surface of the shutter curtain contacts the floor surface and the seat plate switch is operated before the lower limit switch is operated, the floor surface becomes true. Since the shutter curtain is detected as an obstacle and the avoidance operation for the obstacle is performed, and the shutter curtain is not stopped at the lower limit position of the shutter curtain, in order to avoid this, a short time before the shutter curtain reaches the lower limit position. In order to reliably operate the lower limit switch at the descending position, it is necessary to accurately adjust the operation of the lower limit switch, and it is necessary to provide a separate circuit for timer control.

The present invention has been made in view of the above-described circumstances, and has as its object to provide a shutter safety device capable of surely stopping a shutter curtain at its lower limit position without complicated adjustment work.

[0006]

In order to achieve the above object, the present invention comprises a lower limit position detecting means for detecting a lower limit position of a shutter curtain, and an obstacle attached to the shutter curtain and located below a lower end surface of the shutter curtain. Obstacle detecting means for detecting, a floor detecting means attached to the shutter curtain for detecting a floor surface before the obstacle detecting means detects the floor surface as an obstacle, and an obstacle detecting means attached to the shutter curtain A transmitter that transmits an obstacle signal when an obstacle is detected and transmits a floor signal when the floor detecting means detects the floor, and an obstacle signal and a floor signal provided on the building side. Receiving an obstacle signal before the receiver receives a floor signal, and operating the shutter curtain to avoid the obstacle with respect to the obstacle. After receiving the floor signal, control means for stopping the shutter curtain when the lower limit position detecting means detects the lower limit position of the shutter curtain without performing an obstacle avoiding operation even when receiving an obstacle signal. The proposed shutter safety device.

[0007]

With the above arrangement, when an obstacle is present below the lower end surface of the shutter curtain and the obstacle detecting means detects the obstacle, the transmitter transmits an obstacle signal, and the receiver receives the obstacle signal. I do. Based on this obstacle signal, the shutter curtain is operated to avoid the obstacle.

On the other hand, when the floor detecting means detects the floor,
A transmitter transmits a floor signal. When the receiver receives the floor signal, thereafter, even if the receiver receives the obstacle signal, the obstacle avoidance operation is not performed. Then, when the lower limit position detecting means detects the lower limit position of the shutter curtain, even if the floor surface is detected as an obstacle by the obstacle detecting means before the lower limit position detecting means is operated, it is not affected by the obstacle. , The shutter curtain is stopped.

As described above, the stop of the shutter curtain at the lower limit position is performed in accordance with the operation of the lower limit position detecting means without interlocking with the operation of the obstacle detecting means. The same applies to the case where the lower limit position detecting means is provided in order to stop the shutter curtain at the lower limit position in a shutter having no obstacle detecting means, that is, without relating to the obstacle detecting means.

The floor detecting means must be operated before the obstacle detecting means is operated. However, both the floor detecting means and the obstacle detecting means are mounted on the shutter curtain side. Is stopped based on the operation of the lower limit position detection means without interlocking with the operation of the obstacle detection means, and before the obstacle detection means detects the floor as an obstacle, the floor detection means Is not strictly required for the operation timing of the floor detecting means, the operation of the floor detecting means can be easily adjusted visually.

As a result, the shutter curtain can be reliably stopped at its lower limit position without any troublesome adjustment work.

Further, the stop of the shutter curtain at the lower limit position is performed based on the operation of the lower limit position detecting means without interlocking with the operation of the obstacle detecting means. The shutter curtain is stopped at its lower limit position, and there is no need to separately prepare a timer control or the like in preparation for the abnormality, and the structure is simplified.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of a shutter safety device according to the present invention will be described in detail with reference to FIGS.

As shown in FIG. 1, a winding shaft 12 is provided along and above the lintel portion 10, and the upper end of a shutter curtain 14 is wound on the winding shaft 12. The take-up shaft 12 is rotationally driven by a drive motor 18 via a chain 16 and is driven by a drive motor 18.
For example, the forward rotation of the shutter curtain 14 lowers, and the reverse rotation of the drive motor 18 raises the shutter curtain 14. The shutter curtain 14 is configured by connecting a plurality of slats.

A pair of guide rails 20 are provided on both sides of the shutter curtain 14 on the building side. The guide rail 20 has a substantially U-shaped cross section,
From the lintel portion 10 to the floor surface 22, the side edge of the shutter curtain 14 enters and the shutter curtain 14
Is moved up and down along the guide rail 20.

The gear 2 is mounted on the motor shaft 24 of the drive motor 18.
6 is fitted, and a gear 30 meshing with a gear 26 is fitted to a shaft 28 disposed in parallel with the motor shaft 24 so that the rotation of the drive motor 18 is transmitted to the shaft 28. It has become. A male screw portion is formed on the shaft 28, and a moving block 32 that can move along the shaft 28 with the rotation of the shaft 28 is formed on the male screw portion.
Is screwed. An upper limit switch 34 is provided at one end of the movement area of the movement block 32, and a lower limit switch 36 constituting lower limit position detection means is provided at the other end. These upper limit switches 3
4. The lower limit switch 36 is provided for setting the upper limit position of the shutter curtain 14 based on the rotation amount of the drive motor 18, ie, the fully open position, and the shutter curtain 1
4, that is, at the movement position of the movement block 32 corresponding to the fully closed position, and at the movement position of the movement block 32 corresponding to the upper limit position of the shutter curtain 14, the movement block 32 is moved to the upper limit switch 34.
When the moving block 32 contacts the lower limit switch 36 at the moving position of the moving block 32 corresponding to the lower limit position of the shutter curtain 14, the lower limit switch 36 operates.

At the lower end of the shutter curtain 14, a seat plate switch 38 constituting an obstacle detecting means is provided. As shown in FIG. 2, a seat plate switch 38 is provided at the lower end of the shutter curtain 14 such that a seat plate 40 having a U-shaped cross section with an open bottom is hung down along the width direction of the shutter curtain 14. The detection plate 42 is positioned so as to close the open lower end of the sensor. The detection plate 42 is moved up and down by engaging an engagement piece 44 raised on both side edges thereof and a corresponding engagement piece 46 protruding from the inside of the seat plate 40 so as to correspond to the engagement piece 44. It is possible to move. Also,
A limit switch 48 for a seat plate switch is mounted inside the seat plate 40. When the detection plate 42 comes into contact with an obstacle and moves relative to the seat plate 40, the limit switch 48 for the seat plate switch The operation is performed by being pushed by the detection plate 42.

A transmitter 52 is mounted on the upper surface of the seat plate 40 at one end in the longitudinal direction of the seat plate 40, and at the right end in FIG. The limit switch 48 for the seat plate switch is connected to the transmitter 52, and the seat plate switch 38
Is activated, the obstacle signal is transmitted as an infrared light signal by the light emitting unit 50 provided on the upper surface of the transmitter 52. As shown in FIG. 3, in the transmitter 52, a photoelectric tube sensor 54 constituting a floor surface detecting means is integrally housed at the right end thereof, and the guide rail 20 is slightly above the floor surface 22. Above, a reflecting plate 56 is fixed corresponding to the photoelectric tube sensor 54, and when the shutter curtain 14 descends and the photoelectric tube sensor 54 comes to a position facing the reflecting plate 56, light emitted from the photoelectric tube sensor 54 is emitted. The light is reflected by the reflecting plate 56 and received by the photoelectric tube sensor 54, so that the photoelectric tube sensor 54 is activated. The photoelectric tube sensor 54 can detect the floor surface. This photoelectric tube sensor 54 also
When connected to the transmitter 52 and the photoelectric tube sensor 54 operates, a floor signal is transmitted by the light emitting unit 50 as an infrared light signal. The transmitter 52 has a built-in battery 60.
As a common power source, the transmitter 52 and the photoelectric tube sensor 54
Is activated, and the obstacle signal and the floor signal can both be transmitted using the common power supply.

On the other hand, the lintel section 10 on the building side is provided with a light receiving section 58 of a receiver 59 corresponding to the light emitting section 50 of the transmitter 52.
Is attached. The light receiving section 58 receives both an obstacle signal and a floor signal.

[0020] The receiver 59 is connected to a controller 62 constituting control means. As will be described later, when the light receiving unit 58 receives an obstacle signal, the controller 62 stops the drive motor 18 based on the obstacle signal and then reverses the drive motor 18 to raise the shutter curtain 14 and move the shutter curtain 14 against the obstacle. Operate avoidance. In addition, the controller 62
The light-receiving unit 5 moves down the descending stroke of the shutter curtain 14.
8 receives the floor signal once, the obstacle avoiding operation is performed so that the shutter curtain 14 does not operate to avoid the obstacle even after the light receiving unit 58 receives the obstacle signal. Block.

Further, the controller 62 is connected to the upper limit switch 34 and the lower limit switch 36. By operating the upper limit switch 34, the controller 62 stops the shutter curtain 14 at the upper limit position and operates the lower limit switch 36. Thereby, the shutter curtain 14 is stopped at the lower limit position.

In FIG. 1, reference numeral 64 denotes an operation switch for raising, lowering, and stopping the drive motor 14, and is connected to the controller 62.

Next, the operation of this embodiment will be described with reference to the flowchart of FIG. The controller 62 raises the shutter curtain 14, etc., but only the lowering operation directly related to the present invention will be described below.

First, in step 84, when the lowering button of the operation switch 64 is pressed, the lowering of the shutter curtain 14 is started.

If it is determined in step 74 that the lower limit switch 36 has detected the lower limit position of the shutter curtain 14, the flag F is reset in step 75, and the lowering of the shutter curtain 14 is stopped in step 88. . On the other hand, if it is determined that the lower limit switch 36 has not detected the lower limit position of the shutter curtain 14, it is determined in step 76 whether a floor signal has been received. When the floor signal is received, the flag F is set in step 86. When the floor signal is not received, it is determined in step 78 whether an obstacle signal is received. If no obstacle signal is received, the shutter curtain 14
Since there is no obstacle between the detection plate 42 of the seat plate switch 38 and the floor surface 22 and the seat plate switch 38 is not operated,
The lowering of the shutter curtain 14 is continued.

If it is determined in step 78 that an obstacle signal has been received, it is determined in step 79 whether or not the flag F has been reset. If the flag F has been reset, in step 80 the shutter The curtain 14 is operated to avoid the obstacle.

If it is determined in step 79 that the flag F has been set, the process proceeds directly to step 74. As a result, after the receiver 59 receives the floor signal, the detection plate 42 of the seat switch 38 contacts the floor 22 to detect the floor 22 as an obstacle, and the transmitter 52 detects the obstacle. Even if the signal is transmitted and the receiver 59 receives the obstacle signal, the obstacle avoidance operation is not performed depending on the obstacle signal, that is, the obstacle avoidance operation is blocked, and the lowering of the shutter curtain 14 is continued. You.

Therefore, even if the detection plate 42 of the seat plate switch 38 reaches the floor surface 22 and the seat plate switch 38 is actuated before the lower limit switch 36 is actuated and before the lower limit switch 36 is actuated, the lower limit switch 36 is affected. However, the shutter curtain 14 is stopped at the lower limit position.

As described above, the stop of the shutter curtain 14 at the lower limit position does not interlock with the operation of the seat plate switch 38, that is, regardless of the operation of the seat plate switch 38, before or after the operation of the lower limit switch 36. Therefore, the lower limit switch 36 is adjusted in the same manner as the case where the lower limit switch is provided to the drive motor in order to stop the shutter curtain at the lower limit position in the shutter having no seat plate switch.

The phototube sensor 54 needs to be operated before the seat panel switch 38 detects the floor surface 22 as an obstacle, but the phototube sensor 54 and the seat panel switch 38 need to operate.
Both are attached to the seat plate 40 of the shutter curtain 14, and the stop at the lower limit position of the shutter curtain 14 is performed based on the operation of the lower limit switch 36 regardless of the operation of the photoelectric tube sensor 54. If the photoelectric tube sensor 54 operates before the floor 38 detects the floor 22 as an obstacle, the operation timing is not strictly required.
The adjustment of the operation of the photoelectric tube sensor 54, such as the setting of the mounting height position of, can be easily performed visually.

As a result, when the lower limit switch 36 and the reflection plate 56 are mounted, or when the operation is adjusted, the shutter curtain 14 can be mounted without any troublesome adjustment work.
Can be reliably stopped at its lower limit position, no special timer control or the like is required, and the structure is simplified.

The shutter curtain 14 is stopped by
Since the operation is performed based on the operation of the lower limit switch 36 without interlocking with the operation of the seat plate switch 38, even if there is any abnormality in the seat plate switch 38, the shutter curtain 1
4 is stopped at its lower limit, and in preparation for its abnormality,
There is no need to prepare timer control or the like, and the structure is simplified.

Further, since both the obstacle signal and the floor signal are transmitted by the common battery 60, for example, when the battery 60 runs out, the obstacle signal and the floor signal are transmitted. None will be sent. This is done for the following reason. That is, when the obstacle signal and the floor signal are transmitted using separate batteries, the obstacle signal is transmitted when the battery corresponding to the floor signal is exhausted. This is because the detection plate 42 of the seat plate switch 38 may come into contact with the floor surface 22 before the 36 is operated, and the seat plate switch 38 may be operated. In this case, an obstacle avoidance operation is performed. .

Although the embodiment has been described above, the present invention is not limited to the above-described embodiment, and can be variously modified. For example, in the above-described embodiment, the lowering position detecting means is constituted by the photoelectric tube sensor 54 and the reflecting plate 56 is provided in correspondence thereto. However, the present invention is not limited to this, and is constituted by a mechanical type such as a limit switch. You may.

[0035]

As described above, according to the shutter safety device of the present invention, the shutter curtain can be reliably stopped at its lower limit position without any troublesome adjustment work.

[Brief description of the drawings]

FIG. 1 is a schematic front view showing an embodiment of a shutter safety device according to the present invention.

FIG. 2 is an enlarged vertical sectional view showing the seat panel switch in FIG. 1;

FIG. 3 is a perspective view of a transmission unit in FIG. 1;

FIG. 4 is a flowchart of an embodiment of the shutter safety device according to the present invention.

[Explanation of symbols]

 Reference Signs List 14 shutter curtain 22 floor surface 36 lower limit switch (lower position detection means) 38 seat plate switch (obstacle detection means) 52 transmitter (54 photoelectric tube sensor (floor detection means) 59 receiver 62 controller (control means)

Claims (1)

(57) [Scope of request for utility model registration] 1. Lower limit position detecting means for detecting a lower limit position of a shutter curtain, obstacle detecting means attached to the shutter curtain for detecting an obstacle below a lower end surface of the shutter curtain, and an obstruction attached to the shutter curtain. Floor detecting means for detecting the floor before the object detecting means detects the floor as an obstacle, and transmitting an obstacle signal when the obstacle detecting means attached to the shutter curtain detects an obstacle. A transmitter for transmitting a floor signal when the floor detection means detects the floor, a receiver provided on the building side for receiving an obstacle signal and a floor signal, and the receiver for transmitting the floor signal. If an obstacle signal is received before receiving the signal, the shutter curtain operates to avoid the obstacle, and after receiving the floor signal, an obstacle signal is received. Control means for stopping the shutter curtain when the lower limit position detecting means detects the lower limit position of the shutter curtain without performing the object avoiding operation.