JP2543461Y2 - Obstacle detection device for shutter - 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 obstacle detecting device arranged at the lower end of a shutter curtain for detecting an obstacle.

[0002]

2. Description of the Related Art At the lower end of a shutter curtain, a seat plate switch is provided as an obstacle detecting device for detecting an obstacle when the shutter curtain is lowered.

[0003] This seat plate switch is provided with a box-shaped seat plate attached to a lower end portion of a shutter curtain so as to open downward. Below the seat plate, a plurality of movable plates that can move up and down with respect to the seat plate are arranged at predetermined intervals in the width direction of the shutter curtain. A micro switch is provided for each moving plate. this is,
This is because if one moving plate is used, the moving plate is bent so as to protrude downward due to its own weight, and the operation of the microswitch cannot be reliably performed. According to this seat plate switch,
When the shutter curtain is moved downward and the moving plate comes into contact with an obstacle and is moved upward, the micro switch is actuated by the moving plate, and based on this operation, the shutter curtain is stopped or moved upward.

[0004]

In the above-mentioned conventional shutter seat switch, a plurality of moving plates having a short length are provided in the width direction of the shutter curtain, and a micro switch is provided in correspondence with each of these moving plates. An object is being detected.

Therefore, the conventional shutter seat panel switch requires a plurality of microswitches, and there is a problem that the cost increases accordingly. Further, since it is necessary to assemble a plurality of moving plates and a plurality of microswitches, there is an inconvenience that assembling of the seat plate switch takes time.

The present invention has been made in consideration of the above-described circumstances, and has as its object to provide an obstacle detecting device for a shutter that can reduce the number of detecting means such as switches and can be easily assembled.

[0007]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, the present invention provides a rotating device which is rotatably supported on a seat plate attached to a lower end portion of a shutter curtain such that a longitudinal direction thereof is rotatable in a width direction of the shutter curtain. A body, a moving member that is supported so as to be capable of relative movement with respect to the seat plate and that rotates the rotating body by the relative movement, and a detecting unit that detects that the rotating body is rotated by the moving member. It is comprised including.

[0008]

According to the present invention, a rotating body is supported by a seat plate attached to the lower end of the shutter curtain so that its longitudinal direction can be turned in the width direction of the shutter curtain. Also,
A moving member is provided so as to be able to move relative to the seat plate and rotates the rotating body by the relative movement, and a detecting means for detecting that the rotating body has been rotated by the moving member is provided.

When the moving member comes into contact with the obstacle, the moving member causes the moving member to relatively move with respect to the seat plate, and the relative movement rotates the rotating body. The rotation of the rotating body is detected by the detecting means, and thereby an obstacle is detected.

In the above invention, the obstacle is detected by rotating the rotating body so that the obstacle can be reliably detected without being affected by the bending. In addition, if the rotating body is formed of a cylindrical member or a columnar member that does not easily bend, it is possible to prevent the rotating body from being affected by the bending. Further, since the rotation of the rotating body is detected, the cost can be reduced by using only one detecting means.

[0011]

1 is a schematic view of an electric shutter provided with a shutter seat switch according to a first embodiment of the present invention.

A shutter curtain 10 formed by connecting a plurality of slats is guided at both ends by a metal guide rail 15 having a substantially U-shaped cross section which is stretched from the lintel portion 11 to the floor surface 13. It is configured to move up and down. The upper end of the shutter curtain 10 is attached to a take-up shaft 17 and the take-up shaft 1
The shutter curtain 10 can be moved up and down by rotating the shutter 7 by a motor 21 via a chain 19. The motor 21 is stopped or rotated in both forward and reverse directions by a control circuit 35 having a microcomputer.

At the lower end of the shutter curtain 10, a transmitter 27 having a seat plate switch 23 which is turned on when an obstacle or the like comes into contact and a light emitting unit 25 which emits infrared rays when the seat plate switch 23 is turned on. Is attached. Further, a power supply circuit 29 including batteries such as dry batteries and storage batteries is connected to the transmitter 27. Further, a light receiving section 31 is attached to the lintel section 11, and the light receiving section 31 is connected to a control circuit 35 via a receiver 33. An operation device 37 for raising, lowering, and stopping the shutter curtain 10 is connected to the control circuit 35.

As shown in FIG. 2, the seat plate switch 23 includes a box-shaped seat plate 12 fixed to the lower end of the shutter curtain 10 and opened at the bottom and provided with an upper plate 18. The seat plate 12 is arranged with its longitudinal direction facing in the width direction of the shutter curtain 10 (the left-right direction in FIG. 1). At one end of a lower end portion of the seat plate 12, a stopper 14 bent inward at a substantially right angle is formed.

The lower end of the seat plate 12 has a support portion 1 having a lower portion and an open lower part formed in a C-shaped cross section.
6 are formed. On the inner surface of the upper plate 18 of the seat plate 12,
The micro switch 28 with the pressing portion 28A directed downward is 1
Individually mounted. Further, the seat plate 12 is provided with a substantially arc-shaped holding portion 20 that protrudes downward at a substantially central portion of the inner surface of the upper plate 18 in the width direction (horizontal direction in FIG. 2). The microswitch 28 side of the holding unit 20 is open. The holding section 20 is fixed to the upper plate 18 and the support section 16. In the holding section 20, a cylindrical rotating body 22 is rotated in the width direction of the shutter curtain 10 (a direction orthogonal to the plane of FIG. 2) while being in contact with the inner wall of the holding section 20.
It is held rotatably by being placed in a state facing. The rotating body 22 is provided substantially over the extra width of the shutter curtain. In addition, although the holding part 20 and the rotating body 22 of the present embodiment and the second embodiment described below are drawn in a non-contact state, they are actually in contact with each other as shown in FIGS. I have.

As shown in FIG. 3, a plate-like pressing member 24 protruding outward in the radial direction is provided on the outer peripheral surface of the rotating body 22 over the entire rotating body 22 in the axial direction.

One end of a plate-shaped sensing lever 26 as a movement member is supported by the support member 16 so as to be rotatable about the support member 16. The sensing lever 26 has a cylindrical base 26A formed at one end, and a pressing plate 26B erected at the end opposite to the base 26A. Then, the base 26A is inserted into the support member 16, and the sensing lever 26 is supported by the seat plate 12 so as to be rotatable about the base 26A.

At a substantially central portion of the pressing plate 26B, there is provided an engaging piece 26C for engaging with the stopper 14. Before the obstacle comes in contact with the lower surface of the sensing lever 26, the pressing plate 26B is engaged with the engaging piece 26C and the stopper 14.
Is in contact with the pressing member 24. In this case, the distal end of the pressing plate 26B and the pressing member 24 may have a slight gap.

In this embodiment, the microswitch 28 is 1
Although only a plurality of microswitches are provided, a plurality of microswitches 28 may be provided along the longitudinal direction of the seat plate 12 to more reliably detect an obstacle. Micro switch 28
Has a pressing portion 28A urged to protrude outward by a built-in return spring, and the microswitch 28 is turned on by pressing the pressing portion 28A against the urging force of the return spring. I do. The pressing portion 28A faces the pressing member 24. Then, when the rotating body 22 is rotated counterclockwise in FIG. 2, the pressing portion 28 </ b> A can be pressed by the pressing member 24.

Next, the operation of this embodiment will be described. When the motor 21 is rotated in a predetermined direction by the control circuit 35, the shutter curtain 10 is lowered. If there is an obstacle between the shutter curtain 10 and the floor, the obstacle comes into contact with the lower surface of the sensing lever 26 due to this lowering. When the shutter curtain 10 is further moved downward from this contact state, the sensing lever 26 is rotated counterclockwise in FIG. 2 around the base 26A.

As a result, the pressing member 24 is pressed against the pressing plate 26B.
2 and is rotated counterclockwise in FIG. Due to this rotation, the pressing member 24 moves the pressing portion 28A.
Press. As a result, the microswitch 28 is turned on, a signal is output from the transmitter 27, and the light emitting unit 25 emits infrared rays based on the signal. The emitted infrared light is received by the light receiving unit 31, converted into an electric signal, and received by the receiver 33. As a result, a reception signal is output from the receiver 33. The received signal is input to the control circuit 35, based on which the operation of the motor 21 is stopped and the operation of the shutter curtain 10 is stopped by the control circuit 35, or the shutter curtain 10 is raised by rotating the motor 21 in the reverse direction. You.

In this case, the pressing portion 24A of the microswitch 28 is pressed by the pressing member 24 rotated together with the rotating body 22.
, The pressing portion 28A can be reliably pressed without being affected by the bending of the rotating body 22. Therefore, the reliability of obstacle detection is improved, and the need to provide a plurality of microswitches 28 is eliminated. Further, in the present embodiment, since the rotating body 22 is formed in a cylindrical shape instead of the conventional plate shape, the bending of the rotating body 22 can be suppressed,
Obstacles can be detected more reliably.

The shutter curtain 10 is driven by the motor 21.
Is raised, the sensing lever 26 and the rotating body 22 rotate clockwise around the base 26A under their own weight, and return to the initial state shown in FIG. The pressing portion 28A of the microswitch 28 is also returned to the initial state by the built-in return spring.

In the above description, the rotor 22 returns to the initial state shown in FIG. 2 by its own weight. However, the rotor 22 is held in the state shown in FIG. When the contact is made, that is, when the contact state between the obstacle and the sensing lever 26 is released, the state shown in FIG. 2 may be returned by the elastic force of the spring.

FIG. 4 shows a second embodiment of the shutter seat panel switch according to the present invention. The same members as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted.

In this embodiment, a box-shaped seat plate 30 having an open bottom is provided, and a stopper 32 bent at a substantially right angle in a direction approaching each other is formed at the lower end of the seat plate 30. Further, in this embodiment, a sensing plate 34 having an abutting portion 36 which is open at the top and abuts against the stopper 32 is formed at an end. The sensing plate 34 is supported by the seat plate 30 in a state where the contact portion 36 is in contact with the upper surface of the stopper 32. In this support state, the sensing plate 34 can move upward.

In the vicinity of the end of the bottom plate 38 of the sensing plate 34, a pressing plate 40 is provided upright. The tip of the pressing plate 40 is in contact with the pressing member 24 in the state of FIG. In addition,
In this case, the distal end portion of the pressing plate 40 and the pressing member 24 may have a slight gap.

When the motor 21 is rotated in a predetermined direction by the control circuit 35, the shutter curtain 10 is moved downward. When an obstacle comes into contact with the lower surface of the bottom plate 38 and the shutter curtain 10 is further moved downward from this contact state, the sensing plate 34 is moved upward. Thereby, the pressing plate 40 is pressed by the pressing member 24 and rotated in the counterclockwise direction in FIG.

By this rotation, the pressing member 24 moves the pressing portion 2
Press 8A. As a result, the micro switch 28 is turned on, and based on this, the control circuit 35 controls the motor 2.
1 is stopped and the operation of the shutter curtain 10 is stopped, or the motor is reversely rotated to raise the shutter curtain 10.

In this embodiment, as in the first embodiment, the pressing portion 24A of the microswitch 28 is pressed by the pressing member 24 which is rotated together with the rotating body 22, so that it is affected by the bending of the rotating body 22. No pressing part 2
8A can be pressed. Therefore, the reliability of obstacle detection is improved, and the need to provide a plurality of microswitches 28 is eliminated. Further, since the rotating body 22 is formed in a cylindrical shape instead of the conventional plate shape, the bending of the rotating body 22 can be suppressed, and the detection of an obstacle can be performed more reliably.

FIGS. 5 to 7 show a third embodiment of the shutter seat panel switch according to the present invention. The first
About the same member as an Example, the same code | symbol is attached | subjected and description is abbreviate | omitted.

In this embodiment, a cylindrical holding portion 48 having an insertion hole 48A is provided below the inner peripheral surface at one end, and a cylindrical holding portion 49 having an insertion hole 49A is provided at the other end. The used rotating body 42 is used (FIG. 7). The seat plate 60 is formed in a box shape with an open lower end, and has rectangular plate-shaped support portions 44 and 46 on both sides.

As shown in FIG. 6, the support portion 44 arranged on one end side is formed with a spring insertion hole 54 and a columnar pin 50 projecting vertically from the support portion 44. The support portion 46 has a cylindrical pin 5 vertically protruding from the support portion 46.
8 are formed. The insertion hole 54 is formed at an eccentric position from the axis of the pin 50.

As shown in FIG. 6, a projection having an insertion hole 52 is formed inside one end of the rotating body 42.
The insertion hole 52 is inserted into the insertion hole 4 with the axis of the rotating body 42 interposed therebetween.
8A. This insertion hole 52
Each of both ends of the coil spring 56 is inserted into the insertion hole 54. When the pin 50 is inserted into the coil spring 56 and the insertion hole 48A, one end of the rotating body 42 is supported. The other end of the rotating body 42 is supported by inserting the pin 58 into the insertion hole 49A.

The rotating body 42 has the pins 5 at both ends as described above.
0 and 58, it is rotatably supported eccentrically from the center axis and one end is supported via a coil spring 56. In the initial state shown in FIG. It is held in a vigorous state. That is, the rotational force about the pins 50 and 58 due to its own weight and the restoring force of the coil spring 56 are held in a balanced state. In this state, the tip of the pressing plate 26B is separated from the outer peripheral surface of the rotating body 42. As shown in FIG. 5, in this embodiment, the pressing member 24 is fixed slightly counterclockwise from the uppermost part of the rotating body 42.
A support piece 47A provided on the side plate 47 of the seat plate 60 so that the pressing portion 28A can be pressed when the pressing member 24 is rotated counterclockwise by a predetermined amount with the rotation of the rotating body 42.
, A microswitch 28 is attached.

When the motor 21 is rotated in a predetermined direction by the control circuit 35, the shutter curtain 10 is lowered. Due to this lowering, an obstacle comes into contact with the lower surface of the sensing lever 26, and from this contact state, the shutter curtain 10 further moves.
Is moved downward, the sensing lever 26 is rotated counterclockwise in FIG. 5 around the base 26A against the urging force of the coil spring 56. As a result, the distal end of the pressing plate 26 </ b> B comes into contact with the rotating body 42. By this contact, the rotating body 42
5, a rotating force in the counterclockwise direction is applied, and the rotating body 42 is rotated in the counterclockwise direction.

In this case, since the rotating body 42 is held in an unstable state in which the rotating force due to its own weight and the restoring force of the coil spring are balanced, the rotating body 42 is easily rotated counterclockwise by the contact of the pressing plate 26B. Is done. Therefore, the pressing member 24 is also rotated counterclockwise, and the pressing member 24 presses the pressing portion 28A. As a result, the microswitch 28 is turned on, and the control circuit 35 performs the same operation as described above for avoiding an obstacle. When the shutter 21 is raised by the motor 21, the sensing lever 26 is rotated clockwise around the base 26A by the restoring force of the coil spring 56. As a result, the initial state shown in FIG. 5 in which the rotational force due to its own weight and the restoring force of the coil spring are balanced is returned. The pressing portion 28A is returned to an initial state by a built-in return spring.

In the third embodiment, as in the first and second embodiments, the effects of improving the reliability of detecting an obstacle and eliminating the need to provide a plurality of microswitches 28 are obtained.

FIG. 8 shows a shutter seat switch according to a fourth embodiment of the present invention. The same members as those in the third embodiment are denoted by the same reference numerals, and description thereof will be omitted.

This embodiment differs from the third embodiment in that a sensing plate 34 similar to that shown in FIG. The sensing plate 34 has a pressing plate 62
Are formed. The upper part of the sensing plate 34 is open toward the shutter curtain 10. The sensing plate 34 has an abutting portion 36 formed at an end thereof and bent outward in a substantially right angle direction. The sensing plate 34 is supported by the seat plate 60 in a state where the contact portion 36 is in contact with the upper surface of the stopper 32. In this support state, the sensing plate 3
Numeral 4 is movable upward toward the shutter curtain 10.

When the sensing plate 34 is moved upward,
The pressing plate 62 contacts the rotating body 42. Thus, the rotating body 42 is rotated in the counterclockwise direction in FIG. 7 as in the third embodiment. Due to this rotation, the pressing portion 28 is pressed by the pressing member 24.
A is pressed. As a result, the microswitch 28 is turned on, and the control circuit 35 performs an obstacle avoiding operation.

In the fourth embodiment, as in the first to third embodiments, the effects of improving the reliability of detecting an obstacle and eliminating the need to provide a plurality of microswitches 28 are obtained.

Next, a fifth embodiment of the present invention will be described with reference to FIGS. 9 (1) and 9 (2). In this embodiment, a weight is formed on the pressing member 24 of the first embodiment so that the initial state can be quickly returned. A weight 82 is formed on the surface of the pressing member 24 opposite to the microswitch 28. The weights 82 may be formed over the entire length of the pressing member 24, or a plurality of weights 82 may be provided at predetermined intervals in the length direction of the pressing member 24. Also, the rotating body 22, the pressing member 24 and the weight 8
2 may be manufactured separately and assembled, but it is preferable to form it integrally. When integrally molded, processing is facilitated because it is only necessary to cut to a required length. On the upper surface of the seat plate 80, a mounting plate 80B for mounting to the shutter curtain 10 is formed. The hole 14A formed in the stopper 14 and the hole 80A formed in the seat plate 80 are screw holes for mounting the side plate of the seat plate.

Also in this embodiment, when an obstacle comes into contact with the sensing lever 26, the sensing lever 26 is rotated about the base 26A, and the weight 82 is pressed by the sensing lever 26, thereby rotating the rotating body 22. Then, the microswitch 28 is turned on (FIG. 9 (2)). When the obstacle is removed, the sensing lever 26 and the rotating body 22 are returned to their initial states (the state of FIG. 9A) by their own weight, and the pressing portion 28A of the microswitch 28 is returned to by a built-in return spring. In the present embodiment, since the weight 82 is provided, the moment in the return direction is increased, and the return can be performed quickly.

In this embodiment, the sensing plate described above may be used instead of the sensing lever.

Next, a sixth embodiment of the present invention will be described with reference to FIGS. 10 (1) and 10 (2). In the present embodiment, the weight of the fifth embodiment is manufactured and attached separately.
Therefore, portions corresponding to those in FIG. 9 are denoted by the same reference numerals, and description thereof is omitted. A weight holding plate 84 that is bent in an arc shape is formed on a surface of the pressing member 24 of the present embodiment opposite to the microswitch 28. The weight holding plate 82 is
May be formed over the entire length of the pressing member 24, or may be provided at predetermined intervals in the length direction of the pressing member 24. And, between the pressing member 24 and the weight holding plate 84, the weight 8 composed of a round bar is provided.
2 has been inserted. In the present embodiment, since the weight 82 is inserted, the weight for returning the rotating body can be optimized by selecting a weight having a weight corresponding to the size of the opening frontage.

In this embodiment, the sensing plate described above can be used instead of the sensing lever.

Although an example in which the obstacle detection signal is transmitted by infrared rays has been described above, the obstacle detection signal may be transmitted using light other than infrared rays, such as a laser, a radio wave, or a sound wave. Also, an example using a microswitch that is turned on by pressing has been described, but an inductive type, a capacitive type, a reed switch type proximity switch, which outputs a signal when the actuator approaches within a predetermined distance, a light receiving device The element and the light-emitting element may be arranged correspondingly, and a light-shielding plate may be provided on the sensing lever to detect light when the sensing lever is rotated, such as an optical switch.

[0049]

As described above, according to the present invention, it is possible to detect an obstacle without providing a plurality of switches and to surely detect an obstacle. Further, since a plurality of switches are not provided, a seat is provided. The effect that the assembly of the plate switch is simple is obtained.

[Brief description of the drawings]

FIG. 1 is a schematic view when the present invention is applied to an electric shutter.

FIG. 2 is a sectional view showing the vicinity of the lower end of the shutter curtain according to the first embodiment of the present invention;

FIG. 3 is a perspective view showing a rotating body and a pressing member.

FIG. 4 is a sectional view of a second embodiment of the present invention.

FIG. 5 is a sectional view showing the vicinity of a lower end portion of the shutter curtain according to the third embodiment of the present invention.

FIG. 6 is an exploded perspective view illustrating a support state of an end of the rotating body on the micro switch side in FIG. 5;

FIG. 7 is a cross-sectional view of the shutter seat panel switch of FIG. 5 cut in a longitudinal direction.

FIG. 8 is a sectional view showing the vicinity of a lower end portion of a shutter curtain according to a fourth embodiment of the present invention.

FIG. 9 is a sectional view of a fifth embodiment of the present invention.
(2) is a sectional view of the fifth embodiment of the present invention.

FIG. 10 is a sectional view of a sixth embodiment of the present invention. (2) is a sectional view of the sixth embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Shutter curtain 12 Seat plate 30 Seat plate 60 Seat plate 22 Rotating body 42 Rotating body 26 Moving member 34 Moving member 28 Micro switch 28A Pressing part

Claims (1)

(57) [Scope of request for utility model registration] 1. A rotating body rotatably supported on a seat plate attached to a lower end portion of a shutter curtain so that a longitudinal direction thereof is directed in a width direction of the shutter curtain, and is supported so as to be relatively movable with respect to the seat plate. An obstacle detecting device for a shutter, comprising: a moving member that rotates the rotating body by the relative movement; and a detecting unit that detects that the rotating body is rotated by the moving member.