JP2011106130A - Shielding device, obstacle detecting means and drive unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enable "detection of an obstacle" and "inversion control" by a simple and inexpensive device constitution. <P>SOLUTION: A shutter device 1 is constituted as a shielding device which includes a driving means 15 for rotatively driving a take-up-shaft 3, unit frames 5a and 5b as supporting means for supporting the driving means 15, an obstacle-detecting means 50, and a control means 60. The obstacle-detecting means 50 comprises: a fixed shaft 51; motion-regulating means (elastic bodies 52g and 52g) which are interposed between the fixed shaft 51 and the unit frames 5a and 5b as the supporting means, and which generates reaction force for regulating the motions of the unit frames 5a and 5b; and a load detecting switch 53 which is operated when the unit frames 5a and 5b operate against the reaction force generated by the motion regulating means (elastic bodies 52g and 52g). <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an electric shielding device provided in an opening of a building, and more particularly to a technique for detecting an obstacle when unwinding shielding means such as a shutter curtain.

  2. Description of the Related Art Conventionally, there is known an electric shutter in which a driving device is configured by a winding shaft that winds up a shutter slat and an electric motor that rotationally drives the winding shaft, and the shutter is opened and closed by the driving device. In this kind of thing, it is set as the structure by which the safety device for ensuring the safety at the time of an obstacle being pinched | interposed during the descent | fall of a shutter slat is provided, and the literature which discloses this safety device also exists (patent document 1,). 2 and 3).

  In Patent Document 1, an obstacle is detected by a seat plate sensor provided on the back surface of the seat plate of the shutter curtain, and the open / close operation is frequently performed in a configuration in which the detection signal is transmitted to the open / close control unit to control the electric motor. For example, a technique is disclosed in which the power consumption of the battery can be suppressed by reducing the number of transmissions of the obstacle detection signal of the transmitter. In this technique, each of the obstacle detection unit and the opening / closing control unit is provided with digital signal processing means such as a microcomputer, and thereby configured to perform signal transmission, control of the electric motor, and the like. In addition, the monitor mechanism can detect whether the shutter is open (fully opened) or closed (fully closed).

  Patent document 2 is also a structure provided with the same seat-plate sensor as patent document 1, and it discloses the structure provided with a solar cell etc. paying attention to the lifetime of a power supply especially.

  In Patent Document 3, a change in the number of revolutions of the electric motor is detected by a detection device having a photo interrupter or the like, and a variation in the number of revolutions (load) is written in a memory. A technique for obtaining a reference value for a number (load) is disclosed. With this technology, a reference value for the number of rotations (load) that fluctuates during the opening / closing operation process is set, so that the electric motor is immediately stopped regardless of the position at which the shutter sandwiches an obstacle. Is possible.

JP 2005-16014 A JP-A-6-307175 JP 2002-194974 A

  The techniques disclosed in Patent Document 1 and Patent Document 2 require a complicated electric / electronic device configuration for transmitting and receiving a signal when an obstacle is detected by radio (infrared). Therefore, a high production cost is required.

  Also, in Patent Document 3, a complicated electric / electronic device such as a detection device having a photo interrupter or the like and a memory is required, and a high manufacturing cost is required.

  On the other hand, in Patent Documents 1, 2, and 3, when an obstacle is detected, the electric motor is stopped, thereby ensuring safety. However, when an obstacle or the like is caught in the closing operation of the shutter, a load such as the weight of the shutter is continuously applied to the obstacle or the like. For this reason, when an obstacle or the like is detected, it is desirable to perform “reversal control” that opens the shutter by reversing the electric motor.

  Here, as a premise that this “reverse control” is possible, “when the seat plate comes into contact with an obstacle in the process of closing the shutter” and “when the seat plate is in the fully closed state, In the case of “contact with a surface”, it is necessary to have a configuration in which individual operations are performed. If the individual operation cannot be performed, the electric motor is reversed by erroneously recognizing the floor surface or the like as an obstacle, and the shutter cannot be fully closed.

  In this regard, since the configuration of Patent Document 1 includes a monitor mechanism, “reversal control” can be performed. However, as described above, the device configuration for signal transmission / reception becomes expensive, and it is necessary to perform this “inversion control” by digital signal processing means such as a microcomputer. The device configuration becomes complicated and inevitably results in an expensive device configuration. On the other hand, since the configurations of Patent Documents 2 and 3 do not have a mechanism corresponding to a monitor mechanism, “inversion control” cannot be performed.

  Therefore, in view of the above-described problems, the present invention eliminates the need for wireless signal transmission / reception in a configuration that can realize “obstacle detection” and “inversion control”, and digital signal processing means, etc. The present invention provides a novel technique that enables a simple and inexpensive apparatus configuration without using the system.

  The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.

That is, as described in claim 1,
Drive means for rotationally driving the winding means;
Support means for supporting the drive means;
Obstacle detection means,
Control means;
A shielding device comprising:
The obstacle detection means includes
A fixed shaft;
An operation restricting means interposed between the fixed shaft and the support means and generating a reaction force for restricting the operation of the support member;
A load detection switch that is operated when the support means operates against a reaction force by the action restriction means;
Have
When the shielding means comes into contact with an obstacle when the shielding means is unrolled and the rotation of the winding means is restricted, the load detecting switch is operated by operating the support means,
The control means includes
When the load detection switch is operated,
A relay circuit for reversing the rotation direction of the winding means by the driving means;
The shielding device is configured.

Moreover, as described in claim 2,
The shielding device is
Upper and lower limit detection means for detecting when the shielding means is in a fully open state and when in a fully closed state,
The upper and lower limit detecting means is
An upper limit detection unit for operating the upper limit detection switch when the shielding means is fully open, in conjunction with the rotation of the winding means and the gear mechanism;
A lower limit detection unit for operating the lower limit detection switch when the shielding means is in a fully closed state in conjunction with rotation of the winding means and a gear mechanism;
Have
The control means, when the upper limit detection switch or the lower limit detection switch is operated,
Having a circuit for interrupting energization to the drive means;
It is to be configured.

Moreover, as described in claim 3,
The support means is configured in a substantially cylindrical shape,
The drive means, the obstacle detection means, and the control means are disposed inside the support means.
It is to be configured.

Moreover, as described in claim 4,
The upper and lower limit detection means is disposed inside the support means.
It is to be configured.

Moreover, as described in claim 5,
The distal end portion of the fixed shaft protrudes from the end portion of the winding means and is configured to be detachable with respect to a support bracket disposed on the side of the winding means,
By removing the fixed shaft from the support bracket and attaching the support shaft of the winding means that can be manually rotated to the support bracket,
The shield device is configured to be switchable between an electric shield device and a manual shield device.

Moreover, as described in claim 6,
The support means is disposed inside the winding means.

Moreover, as described in claim 7,
Obstacle detection means for detecting contact of the shielding means with an obstacle at the time of unwinding of the shielding means,
A fixed shaft;
A second shaft disposed between the fixed shaft and an operation restricting means;
A load detection switch that is operated when the second shaft is operated against a reaction force by the operation restricting means;
Have
The second axis is
It can be fixed to a support means for fixing a driving means for driving the winding means for winding the shielding means,
It serves as an obstacle detection means.

Further, as described in claim 8,
The distal end portion of the fixed shaft protrudes from the end portion of the take-up shaft and can be fixed to a support bracket disposed on the side of the take-up shaft.

Further, as described in claim 9,
Drive means for rotationally driving the winding means;
Support means for supporting the drive means;
Obstacle detection means,
Control means;
A drive unit having
The obstacle detection means includes
A fixed shaft;
An operation restricting means interposed between the fixed shaft and the support means and generating a reaction force for restricting the operation of the support member;
A load detection switch that is operated when the support means operates against a reaction force by the action restriction means;
Have
When the shielding means comes into contact with an obstacle when the shielding means is unrolled and the rotation of the winding means is restricted, the load detecting switch is operated by operating the support means,
The control means includes
When the load detection switch is operated,
A relay circuit for reversing the rotation direction of the winding means by the driving means;
The drive unit is configured.

Moreover, as described in claim 10,
The drive unit is
Upper and lower limit detection means for detecting when the shielding means is in a fully open state and when in a fully closed state,
The upper and lower limit detecting means is
An upper limit detection unit for operating the upper limit detection switch when the shielding means is fully open, in conjunction with the rotation of the winding means and the gear mechanism;
A lower limit detection unit for operating the lower limit detection switch when the shielding means is in a fully closed state in conjunction with rotation of the winding means and a gear mechanism;
Have
The control means, when the upper limit detection switch or the lower limit detection switch is operated,
Having a circuit for interrupting energization to the drive means;
It is to be configured.

Further, as described in claim 11,
The support means is configured in a substantially cylindrical shape,
The drive means, the obstacle detection means, the control means, and the upper and lower limit detection means are disposed inside the support means.
It is to be configured.

Moreover, as described in claim 12,
The distal end portion of the fixed shaft protrudes from the end portion of the winding means and can be fixed to a support bracket disposed on the side of the winding means.

Moreover, as described in claim 13,
The support means is disposed inside the winding means.

  As effects of the present invention, the following effects can be obtained.

That is, in the invention according to claim 1,
The electric shutter device that can perform “obstacle detection” and “reversal control” is simple and inexpensive without the need for wireless signal transmission and reception and without using digital signal processing means. An apparatus configuration can be obtained. In particular, the obstacle detection means can be realized as a so-called mechanical configuration, and an inexpensive configuration can be realized.

In the invention according to claim 2,
It becomes possible to maintain the fully closed / open state of the shutter curtain. In addition, the upper / lower limit detection means can be realized as a so-called mechanical configuration by adopting a gear mechanism, and an inexpensive configuration can be realized.

In the invention according to claim 3,
Each means can be integrated with the support means to form a unit, and the handleability during assembly and transportation can be improved.

In the invention according to claim 4,
The upper and lower limit detection means can be integrated with the support means to form a unit, and the handleability during assembly and transportation can be improved.

In the invention according to claim 5,
Electric and manual specifications can be changed. That is, for example, the support bracket can be shared in the manual shutter device and the electric shutter device. Further, by fixing the fixed shaft of the present invention to a support bracket of an existing manual shutter device or electric shutter device, the configuration of the present invention can be applied later.

In the invention according to claim 6,
Each of the above means can be housed inside the winding means, the space inside the winding means can be effectively utilized, and the shutter device as a whole can be made compact.

In the invention according to claim 7,
The obstacle detection means can be realized as a so-called mechanical configuration including a fixed shaft and a second shaft, and an inexpensive configuration can be realized.

In the invention according to claim 8,
For example, when the specification is changed to a manual shutter device that is manually raised and lowered instead of the above embodiment, the fixed shaft is removed from the support bracket, and the support shaft of the winding means of the manual shutter device is used as the support bracket. Specification can be changed by mounting. That is, the support bracket can be shared between the manual shutter device and the electric shutter device. Further, by fixing the fixed shaft of the present invention to a support bracket of an existing manual shutter device or electric shutter device, the configuration of the present invention can be applied later.

In the invention according to claim 9,
The electric shutter device that can perform “obstacle detection” and “reversal control” is simple and inexpensive without the need for wireless signal transmission and reception and without using digital signal processing means. An apparatus configuration can be obtained. In particular, the obstacle detection means can be realized as a so-called mechanical configuration, and an inexpensive configuration can be realized.

In the invention according to claim 10,
It becomes possible to maintain the fully closed / open state of the shutter curtain. In addition, the upper / lower limit detection means can be realized as a so-called mechanical configuration by adopting a gear mechanism, and an inexpensive configuration can be realized.

In the invention according to claim 11,
Each means can be integrated with the support means to form a unit, and the handleability during assembly and transportation can be improved.

In the invention according to claim 12,
For example, when the specification is changed to a manual shutter device that is manually raised and lowered instead of the above embodiment, the fixed shaft is removed from the support bracket, and the support shaft of the winding means of the manual shutter device is used as the support bracket. Specification can be changed by mounting. That is, the support bracket can be shared between the manual shutter device and the electric shutter device. Further, by fixing the fixed shaft of the present invention to a support bracket of an existing manual shutter device or electric shutter device, the configuration of the present invention can be applied later.

In the invention according to claim 13,
Each of the above means can be housed inside the winding means, the space inside the winding means can be effectively utilized, and the shutter device as a whole can be made compact.

The front view explaining the structure of the shutter apparatus which can apply this invention. The side view explaining the structure of the shutter apparatus which can apply this invention. (A) is a figure shown about the whole drive unit outline. (B) is a figure shown about the relationship between a drive unit, a winding shaft, and a support bracket. The figure shown about the internal structure of a drive unit. (A) is a figure shown about the structure of an obstacle detection means and a control means. (B) is the figure which abbreviate | omitted the supporting member. (A) is a front perspective view which shows about the structure of the 1st axis | shaft of an obstruction detection means. (B) is a rear perspective view showing the configuration of the obstacle detection means and the second shaft. (A) is the sectional view on the AA line of FIG. (B) is the BB sectional drawing of FIG. (C) is a figure shown about the state of the obstruction detection means at the time of detecting an obstruction. The figure shown about the Example of an upper / lower limit detection means. The figure shown about the Example of an upper / lower limit detection means. (A) is a figure shown about the circuit structural example for comprising a control means. (B) is a figure shown about the state of a circuit when an obstruction is detected. FIG. 11 is a diagram showing a circuit configuration when a DC electric motor is used in the circuit configuration of FIG. 10. The figure shown about the structure of the obstruction detection means of Example 2. FIG. (A) is a front perspective view shown about the detail of the obstruction detection means of Example 2. FIG. (B) is a back perspective view shown about the detail of the obstruction detection means of Example 2. FIG. (A) is the sectional view on the AA line of FIG. (B) is the BB sectional drawing of FIG. (C) is a figure shown about the state of the obstruction detection means at the time of detecting an obstruction.

  Hereinafter, embodiments of the present invention will be described using examples.

First, an overall configuration of a shutter device that is an example of a shielding device to which the present invention can be applied will be described.
As shown in FIG. 1, a storage case 2 is disposed on the upper portion of the shutter device 1, and the shutter curtain 4 is wound around a winding shaft 3 that rotates in the storage case 2.

  In the housing case 2, a drive unit 5 is disposed on one end side in the width direction. The drive unit 5 rotationally drives the winding shaft 3 as a winding means, and a shutter as a shielding means. The curtain 4 is unwound / rewinded. The drive unit 5 is operated by an operation switch 20, and the operation switch 20 can be used to raise and lower the shutter curtain 4.

  In addition, a spring assembly 6 is disposed on the other end side in the width direction in the housing case 2, and rotational torque generated by the spring 6 a is transmitted to the take-up shaft 3. This rotational torque acts in the direction in which the shutter curtain 4 is wound up, so that the drive rotational torque required for the drive unit 5 can be reduced.

  Further, as shown in FIG. 1, the shutter curtain 4 is configured by vertically connecting a plurality of long slats 4 a, 4 a... Long in the horizontal direction, and at the lowermost part of the shutter curtain 4. The seat plate 7 is arranged.

  As shown in FIGS. 1 and 2, the shutter curtain 4 descends while its widthwise end is guided by the left and right guide rails 8, 8, and reaches the position of the lower frame 9 of the shutter device 1. The shutter curtain 4 is configured to be in a fully closed state when 7 is reached.

  With the above-described configuration, the shutter device 1 shown in FIGS. 1 and 2 is configured as a so-called electric shutter device.

Next, the configuration of the drive unit 5 will be described with reference to FIGS.
First, as shown in FIG. 3A, the drive unit 5 includes means such as drive connecting means 13, drive transmission means 14, drive means 15, obstacle detection means 50, control means 60, upper and lower limit detection means 70, and the like. Have. Each means excluding the drive connecting means 13 is accommodated in the cylindrical half-shaped unit frames 5a and 5b, and the drive unit 5 has a substantially cylindrical appearance as a whole. . The unit frames 5a and 5b function as support means for supporting the drive means 15.

  As shown in FIG. 3B, in the drive unit 5, the drive unit 15 is configured by, for example, an electric motor, and the rotation output of the drive unit 15 is input to the drive transmission unit 14. The drive transmission means 14 is composed of, for example, a gear box that houses a reduction gear mechanism, and its case portion is fixed to the unit frames 5a and 5b. The drive transmission means 14 is connected to drive connection means 13 disposed outside the unit frames 5a and 5b. The drive connection means 13 is rotationally driven by the drive means 15 via the drive transmission means 14. It has become so. Moreover, the drive connection means 13 is comprised by the cylindrical shaft shape, and the winding shaft 3 is connected and fixed to the outer side. Further, the drive means 15 is fixed to the drive transmission means 14, whereby the drive means 15 is fixed to the unit frames 5 a and 5 b via the drive transmission means 14. With the configuration as described above, the rotational driving force of the driving means 15 is transmitted to the drive connecting means 13 via the drive transmitting means 14, and the winding shaft 3 is rotationally driven by the rotation of the driving connecting means 13. It has become.

  Further, as shown in FIG. 3B, the drive unit 5 is accommodated in the take-up shaft 3, and the drive unit 5 and the take-up shaft 3 are arranged substantially coaxially. It has become.

  Further, as shown in FIG. 3B, in the drive unit 5, the distal end portion 51 a of the first shaft 51 of the obstacle detection means 50 protrudes outward from the axial end portion of the winding shaft 3. The tip 51a is connected and fixed to the shaft fixing part 11a of the support bracket 11. With such a configuration, one end of the drive unit 5 is supported and fixed to the support bracket 11, and the first shaft 51 functions as a fixed shaft of the obstacle detection means 50. become.

  Further, as shown in FIG. 3B, in the drive unit 5, the second shaft 52 of the obstacle detection means 50 is fixed to the unit frames 5a and 5b. When the seat plate 7 presses an obstacle or the like from above when the shutter curtain 4 shown in FIG. 1 is lowered, the rotation of the winding shaft 3 is restricted, and at the same time, the rotation of the drive connecting means 13 is restricted. Is done. At this time, as shown in FIG. 3 (b), the rotational torque T1 of the drive means 15 generates a rotational torque T2 in the opposite direction to the rotational torque T1 in the case portion of the drive transmission means 14, and accordingly, the unit A rotational torque T3 for rotating the frames 5a and 5b is generated. The rotational torque T3 becomes the rotational torque T4 that rotates the second shaft 52 of the obstacle detection means 50. The obstacle detection means 50 is configured to detect an obstacle by detecting the rotation of the second shaft 52 by the rotational torque T4.

  Further, as shown in FIG. 3B, in the drive unit 5, the control means 60 is based on the obstacle detection by the obstacle detection means 50 and the upper limit / lower limit detection by the upper and lower limit detection means 70. Stop and reverse driving are performed.

  Further, as shown in FIG. 3B, in the drive unit 5, the upper and lower limit detecting means 70 is set so that the number of rotations (count) of the winding shaft 3 is when the shutter curtain defined in advance is fully open (upper limit). It can be detected that the rotational speed or the rotational speed (lower limit) in the fully closed state is coincident.

  Further, as shown in FIGS. 3A and 3B, the first shaft 51 of the obstacle detection means 50 is fixed to the unit frames 5a and 5b and integrated with the unit frames 5a and 5b. A support member 78 whose relative angle with respect to the shaft 51 is changed is provided. The main body portion 78a of the support member 78 is disposed inside the unit frames 5a and 5b, and the disk portion 78b at the end portion of the support member 78 is disposed outside the end portions of the unit frames 5a and 5b. Yes.

  Further, as shown in FIGS. 3A and 3B, a substrate member 71 of the upper and lower limit detecting means 70 is attached to the main body portion 78a of the support member 78, and the substrate member 71 is attached to the unit frames 5a and 5b. It is designed to be housed inside.

  Further, as shown in FIG. 3B, an annular connecting ring 72 having an internal gear is provided at the end of the unit frames 5a and 5b so as to surround the outer periphery of the unit frames 5a and 5b. 5b is rotatably provided. The connection ring 72 is connected to the take-up shaft 3 and rotates together with the take-up shaft 3. When the connection ring 72 is rotated, the external gear (provided in upper / lower limit detecting means 70 described later in detail) (Not shown) is rotated. In this way, the rotation of the winding shaft 3 is input to the upper / lower limit detection means 70.

  FIG. 4 shows the internal arrangement of the drive unit 5 with the cylindrical unit frame 5a removed. The drive connecting means 13, the drive transmitting means 14, the drive means 15, the capacitor 16, It shows that the obstacle detection means 50, the upper and lower limit detection means 70, and the control means 60 are arranged. The drive transmission means 14, the second shaft 52 of the obstacle detection means 50, and the support member 78 of the upper and lower limit detection means 70 are fixed to the unit frames 5a and 5b. The transmission means 14, the second shaft 52, and the support member 78 are connected via the unit frames 5a and 5b, and are integrated with the drive transmission means 14, the second shaft 52, the support member 78, and the unit frames 5a and 5b. It has become so. In addition, about the half unit frame 5a * 5b, each means is arrange | positioned at any one, and it is set as the form which functions as a lid | cover, or it is comprised not by a cylindrical case but by a frame-shaped member. There is no particular limitation.

  Further, as shown in FIGS. 5A and 5B, the control means 60 is configured by a relay circuit 61 disposed on the board member 71 fixed to the support member 78 of the upper and lower limit detection means 70. Further, the substrate member 71 is provided with an upper limit detection switch 73 and a lower limit detection switch 74 of the upper and lower limit detection means 70.

Next, the details of the embodiment of the obstacle detection means 50 will be described with reference to FIGS.
As shown in FIGS. 5 to 7, the obstacle detection means 50 includes a first shaft 51 and a second shaft 52 provided coaxially on the outer side of one side end portion (rear end portion) of the first shaft 51. It has the composition to have. A support member 78 fixed to a unit frame (not shown) is arranged coaxially with the first shaft 51 so that the relative angle can be changed. A substrate member 71 is attached to a main body portion 78 a of the support member 78. It can be installed. The board member 71 is provided with an upper limit detection switch 73 and a lower limit detection switch 74 of the upper and lower limit detection means 70.

  Further, as shown in FIGS. 5 to 7, the tip 51a of the first shaft 51 is fixed to the support bracket 11 (see FIG. 3B), and this tip 51a is not shown. A fixing hole 51b for inserting a fastener is formed. Further, arm portions 51c and 51d projecting in the radial direction of the shaft are formed in the middle portion of the first shaft 51 in the axial direction. In addition, a portion protruding from the second shaft 52 in the rear end portion 51 e (see FIG. 6B) of the first shaft 51 is configured to have a larger outer diameter than a portion surrounded by the second shaft 52. . In the first shaft 51, a second shaft 52 is provided so as to surround a range between the arm portions 51c and 51d and the rear end portion 51e.

  Moreover, as shown to Fig.6 (a) (b) and Fig.7 (a), the 2nd axis | shaft 52 has two half-shaped shaft bodies 52a * 52b. The shaft bodies 52a and 52b are integrated by fixing the first shaft 51 between them by the fixtures 52c and 52d (see FIG. 7A). . In the state where the shaft bodies 52a and 52b are integrated in this way, the arm portions 51c and 51d and the rear end portion 51e (see FIG. 6B) of the first shaft 51 are respectively provided on both sides in the axial direction. By being disposed, the second shaft 52 is positioned in the axial direction with respect to the first shaft 51. The second shaft 52 is configured to be slidable in the rotational direction with respect to the first shaft 51, and the angle can be changed with the first shaft 51 as a center.

  Further, as shown in FIGS. 6A, 6B, 7B, and 7C, in the shaft bodies 52a and 52b of the second shaft 52, respectively, toward the distal end portion 51a side of the first shaft 51. Stopper portions 52e and 52f are projected. Further, as shown in FIG. 7B, in the arrangement facing from the rear end side of the first shaft 51, the stopper portions 52 e and 52 f are arranged at positions shifted from each other by 180 degrees around the axis of the first shaft 51. It has come to be. The first shaft 51 is provided with the aforementioned arm portions 51c and 51d protruding so as to face the stopper portions 52e and 52f. Accordingly, in FIG. 7B, the angle of rotation of the first shaft 51 in the counterclockwise direction is such that the stopper portions 52 e and 52 f on the second shaft 52 side are moved to the arm portions 51 c and 51 d of the first shaft 51. It is defined by contact. That is, the counterclockwise rotation of the second shaft 52 is regulated by the stopper portions 52e and 52f and the arm portions 51c and 51d coming into contact with each other.

  Further, as shown in FIG. 7B, elastic bodies 52g and 52g are interposed between the stopper portion 52e and the arm portion 51c, and between the stopper portion 52f and the arm portion 51d, respectively. Due to the reaction force of the elastic bodies 52g and 52g, gaps 52h and 52h having predetermined rotation angles are formed between the stopper portion 52e and the arm portion 51c, and between the stopper portion 52f and the arm portion 51d, respectively. ing. In the present embodiment, the elastic bodies 52g and 52g are configured by metal springs. However, the shape may be a plate shape or a rod shape, and the material may be configured by rubber or resin. In addition, the elastic bodies 52g and 52g are interposed between the first shaft 51 and the unit frames 5a and 5b, and the elastic bodies 52g and 52g generate a reaction force that restricts the rotation operation of the unit frames 5a and 5b. It functions as an operation restricting means.

  Moreover, as shown to Fig.6 (a), the action part 51j is protrudingly provided in the 1st axis | shaft 51 toward the 2nd axis | shaft 52 side. Although this action part 51j is comprised with the metal rod-shaped member, and is set as the structure attached to the 1st axis | shaft 51, it is good also as a structure provided in the 1st axis | shaft 51 integrally.

  As shown in FIG. 6A, a load detection switch 53 attached to an extending portion 71a extending from the substrate member 71 of the upper and lower limit detecting means 70 is disposed in the vicinity of the action portion 51j. Further, as shown in FIG. 7B, in the arrangement facing from the rear end side of the first shaft 51, the load detection switch 53 is arranged on the side in the counterclockwise direction with respect to the action portion 51j. The movable contact piece 53a of the switch 53 is opposed to the action portion 51j. Then, as shown in FIG. 7C, when the substrate member 71 attached to the support member 78 of the upper and lower limit detecting means 70 rotates counterclockwise, and the load detection switch 53 moves in the counterclockwise direction. The movable contact piece 53a of the load detection switch 53 is pressed by the action portion 51j. The load detection switch 53 is configured to be turned on when the movable contact piece 53a is pressed by the action portion 51j, and turned off when the movable contact piece 53a is not pressed by the action portion 51j. Thus, in the situation where the load detection switch 53 is turned on, that is, in the situation where the support member 78 (base member 71) is rotated counterclockwise as shown in FIG. Will be made.

Here, a situation when the support member 78 (base member 71) shown in FIG. 7C rotates, that is, a situation where an obstacle is detected by the load detection switch 53 will be described.
As shown in FIG. 1, when the seat plate 7 comes into contact with an obstacle or the like when the shutter curtain 4 is lowered, and the seat plate 7 presses the obstacle or the like from above, the rotation of the winding shaft 3 is restricted. At the same time, as shown in FIG. 3B, the rotation of the drive connecting means 13 is restricted. At this time, due to the rotational torque T1 of the drive means 15, a rotational torque T2 in the opposite direction to the rotational torque T1 is generated in the case portion of the drive transmission means 14, and accordingly, the rotational torque that rotates the unit frames 5a and 5b. T3 occurs. This rotational torque T3 becomes the rotational torque T4 for rotating the second shaft 52 of the obstacle detecting means 50 and the support member 78. And as shown in FIG.7 (c), when this rotational torque T4 resists the reaction force of elastic body 52g * 52g, the 2nd axis | shaft 52 fixed with respect to unit frame 5a * 5b, and a supporting member When 78 is rotated counterclockwise in the drawing, the load detecting switch 53 is turned on by the action portion 51j.

Next, details of an embodiment of the upper and lower limit detection means 70 will be described with reference to FIGS.
The upper / lower limit detecting means 70 is configured such that the rotation number (count) of the winding shaft is a rotation number when the shutter shutter is fully opened (upper limit) or a rotation number (lower limit) when the shutter curtain is fully closed. It is for detecting that it matches. FIG. 8 shows an upper limit detection unit 83 for detecting the number of rotations when the shutter curtain is fully open (upper limit). A configuration similar to this upper limit detection unit 83 is provided as a lower limit detection unit 84 as shown in FIG.

  As shown in FIGS. 5 and 9, a support member 78 having a main body portion 78a and a disk portion 78b is arranged on the same axis of the first shaft 51 of the obstacle detection means 50 so that the relative angle can be changed. An upper limit detection unit 83 is provided in the internal space of the main body 78 a of the support member 78. An upper limit detection switch 73 operated by the upper limit detection unit 83 is provided on the substrate member 71 fixed to the support member 78. Similarly, a lower limit detection unit 84 and a lower limit detection switch 74 configured in the same manner are provided on the support member 78 and the substrate member 71, respectively. The upper limit detection switch 73 and the lower limit detection switch 74 can be configured by, for example, a commercially available contact type micro switch.

  Further, the embodiment of the upper limit detection unit 83 will be described with reference to FIGS. 8 and 9. The upper limit detection unit 83 has a case 83 a fixed to the main body portion 78 a of the support member 78. It has a reduction gear mechanism. In this reduction gear mechanism, a first shaft 83b into which gears 83c, 83d, 83e, and 83f are loosely fitted and a second shaft 83g into which gears 83h, 83i, and 83j are loosely fitted are arranged in parallel. As for the gear 83h, an external tooth 83k having a large number of teeth and an 83m having a smaller number of teeth than the external tooth 83 are formed, the gear 83c is engaged with the external tooth 83k, and the external teeth of the gear 83d are engaged with the external tooth 83m. 83n is engaged. The gear 83d has two external teeth 83p formed on the surface opposite to the external teeth 83n, and these external teeth 83p mesh with the external teeth 83q of the gear 83i.

  With such a configuration, as shown in FIG. 8, the gear 83h is decelerated when the rotational speed of the gear 83c is transmitted to the gear 83d, and further, the gear 83d is decelerated when it is transmitted to the gear 83i. Made. Then, when the external teeth 83r of the gear 83i mesh with the external teeth 83s of the gear 83e, the gear 83e is rotated, and similarly, the gear 83f is rotated via the gear 83j. Yes. With such a configuration, the rotational speed of the gear 83c is decelerated in multiple stages before reaching the gear 83f.

  Further, as shown in FIG. 8, the case 83a is provided with an arm member 83t that is urged to rotate in one direction by a spring material (not shown), and the projection 83u provided on the arm member 83t is provided with a gear. The protrusion 83u is dropped into a groove 83v formed on the outer peripheral surface of the gear 83f according to the rotation angle of the gear 83h. Further, the arm portion 83w of the arm member 83t is disposed so as to face the movable contact piece 73a of the upper limit detection switch 73, and the projection 83u is dropped into the groove 83v with the gear 83h at a specified rotation angle. In this case, the arm member 83t rotates and the upper limit detection switch 73 is operated by the arm portion 83w.

  As shown in FIGS. 8 and 9, the substrate member 71 is rotatably provided with a rotating shaft 75 to which the input gear 76 and the intermediate gear 77 are fixed. The outer teeth of the intermediate gear 77 protrude from an open portion 5k formed in the unit frame 5a, and the intermediate gear 77 meshes with the inner teeth 72a of the connecting ring 72 that rotates together with the winding shaft 3. ing. Further, the input gear 76 is meshed with the gear 83 c of the upper limit detection unit 83.

  And in the above structure, as shown in FIG.8 and FIG.9, when the winding shaft 3 rotates, the intermediate gear 77 will rotate with the connection ring 72, and the rotating shaft 75 will rotate. As a result, the input gear 76 rotates and the gear 83c rotates, and the rotation of the gear 83c is decelerated through the gear mechanism and transmitted to the gear 83f. When the gear 83f reaches a specified rotation angle, the upper limit detection switch 73 is operated by the arm member 83t.

  In the above configuration, when the shutter curtain is fully open, the upper limit detection switch 73 is operated to stop the driving means and finish winding. This setting can be performed by fully opening the shutter curtain, adjusting the rotation angle of the gear 83f by an adjustment mechanism (not shown), and operating the upper limit detection switch 73. In addition, the reduction ratio of the reduction gear mechanism constituted by each gear is such that the upper limit detection switch 73 can be operated only when the shutter curtain is fully open, and each gear is adjusted accordingly. The number of teeth is designed.

  Although FIG. 8 shows the upper limit detection unit 83, the lower limit detection unit 84 shown in FIGS. 5 and 9 can also be configured in the same manner, and thus the detailed description of the lower limit detection unit 84 is omitted. . Further, according to the configurations of FIGS. 5, 8, and 9, the upper limit detection unit 83 and the lower limit detection unit 84 can be configured in a compact manner and can be accommodated in the main body 78 a of the support member 78. Thus, since it can be accommodated in the unit frame 5a (see FIG. 8) of the drive unit, as shown in FIG. 3 (a), the upper and lower limit detecting means 70 is built in the drive unit 5. It can be realized.

  Next, the circuit configuration of the control means 60 for controlling the drive unit will be described with reference to FIG. In this circuit configuration, the relay circuit 61, the upper and lower limit detection means 70, and the obstacle detection means 50 surrounded by a dotted line are respectively connected to the relay circuit 61, the upper and lower limit detection means 70, and the obstacle detection means shown in FIG. 50.

  As shown in FIG. 10A, the driving means 15 (see FIG. 4) is configured as an AC electric motor M, and power lines 91, 92, and 93 are connected to the electric motor M. When the electric motor M is energized from the power line 91, the electric motor M is driven forward, and when the electric power is supplied from the power line 92 to the electric motor M, the electric motor M is driven reversely. Switching of energization to the electric motor M through the power lines 91 and 92 is performed by switching the contacts 20a and 20b of the operation switch 20 provided on the indoor wall or the like.

  In the circuit diagram shown in FIG. 10A, the power line 91 is provided with the lower limit detection switch 74 (lower limit) of the upper and lower limit detection means 70 described above, and the operation switch 20 is operated to the closed side. When the electric motor M is driven forward and the shutter curtain is fully closed, the lower limit detection switch 74 is turned off, the power supply to the electric motor M is cut off, and the driving of the electric motor M is stopped. The Thereby, the fully closed state of the shutter curtain is maintained.

  In the circuit diagram shown in FIG. 10A, the power line 92 is provided with the upper limit detection switch 73 (upper limit) of the upper / lower limit detection means 70, and the operation switch 20 is operated to the open side. When the electric motor M is driven in reverse and the shutter curtain is fully opened, the upper limit detection switch 73 is turned off, the power supply to the electric motor M is cut off, and the driving of the electric motor M is stopped. As a result, the fully open state of the shutter curtain is maintained.

  In the circuit diagram shown in FIG. 10A, the power lines 91 and 92 are connected between the switches 74 and 73 and the electric motor M through the capacitor 16, and as will be described later, obstacle detection is performed. At that time, the relay 95 is energized when the load detection switch 53 is turned on.

  Further, in the circuit diagram shown in FIG. 10A, the power supply lines 91 and 92 are switched between the operation switch 20 and the upper limit detection switch 73 and the lower limit detection switch 74 in the power supply lines 91 and 92. An overload reversing switching contact 94 is provided. The overload reversing switching contact 94 is configured so that the closed contact 94a is maintained when the relay 95 is not excited and the open contact 94b is maintained when the relay 95 is excited. Yes. Further, the relay 95 is energized when the load detection switch 53 of the obstacle detection means 50 is turned on to excite the overload inversion switching contact 94 and to be self-held by closing the relay contact 96. (In order to maintain the excitation of the overload reversal switching contact 94 even when the load detection switch 53 is turned off).

  In the circuit configuration shown in FIG. 10A, the case where the shutter curtain is closed will be described. When the “closed” contact 20 a is closed by the operation of the operation switch 20, the electric motor M is energized from the power line 91. Thus, the electric motor M is driven to rotate forward, and the shutter curtain starts to descend. When the shutter curtain is fully closed, the lower limit detection switch 74 is turned off, the power supply to the electric motor M is cut off, the drive of the electric motor M is stopped, and the shutter curtain is fully closed. Maintained. It should be noted that the shutter curtain can be brought into a half-open state by operating the power switch 90 of the operation switch 20.

  On the other hand, in the circuit configuration shown in FIG. 10A, the case where the shutter curtain is opened will be described. When the “open” contact 20 b is closed by the operation of the operation switch 20, the electric motor M is energized from the power line 92. Then, the electric motor M is driven in reverse and the shutter curtain starts to rise. When the shutter curtain is fully opened, the upper limit detection switch 73 is turned off, the power supply to the electric motor M is cut off, the drive of the electric motor M is stopped, and the fully open state of the shutter curtain is maintained. The It should be noted that the shutter curtain can be brought into a half-open state by operating the power switch 90 of the operation switch 20.

Next, in the circuit configuration shown in FIG. 10A, the behavior when an obstacle or the like is detected when the shutter curtain is lowered will be described with reference to FIG.
As shown in FIG. 10B, when the shutter curtain is lowered, the load detection switch 53 of the obstacle detection means 50 is turned on when it comes into contact with the obstacle. As a result, the capacitor 16 is energized to the relay 95, the overload reverse switching contact 94 is excited by the relay 95, and the switching from the closed contact 94a to the open contact 94b is performed. Further, the relay contact 96 is closed by the relay 95, so that energization of the relay 95 from the power line 92 is maintained (self-holding of the relay 95). Then, since the open contact 94b of the overload reversing switching contact 94 is closed, the electric motor M is energized from the power line 92, the electric motor M is reversed, and the shutter curtain is raised. That is, when an obstacle is detected, the shutter curtain is automatically raised.

  The raising of the shutter curtain is terminated by stopping energization of the electric motor M when the upper limit detection switch 73 (upper limit) is turned off, that is, when the shutter curtain is fully opened. As for the relay 95, the self-holding is released when the power switch 90 of the operation switch 20 is turned off or the contacts 20a and 20b are opened, and the normal operation state (shown in FIG. 10A) is achieved. State).

  Table 1 below summarizes the state of each contact in each situation in the circuit configuration as described above.

  FIG. 10A shows a circuit configuration when the electric motor M is an AC motor. As shown in FIG. 11, when the electric motor M1 is a DC motor, a diode is appropriately disposed. Thus, the same control can be performed. Also in the configuration shown in FIG. 11, the configuration described above can be used for the obstacle detection means 50 and the upper and lower limit detection means 70. In addition, about another structure, while providing AC / DC converter 100, it is set as the structure provided with the overload inversion switching contact 194 which switches two contacts simultaneously about the control means 160, and the power switch 190 and the operation switch 120 are also the same. By adopting a configuration in which the two contacts are switched simultaneously, it is possible to cope with the DC electric motor M1.

The present invention can be implemented as described above.
That is, as shown in FIGS.
Drive means 15 for rotationally driving the take-up shaft 3 as take-up means;
Unit frames 5a and 5b as supporting means for supporting the driving means 15,
Obstacle detection means 50;
Control means 60;
A shutter device 1 configured as a shielding device having:
The obstacle detection means 50 includes:
A fixed shaft 51;
Elastic bodies 52g and 52g as operation restricting means interposed between the fixed shaft 51 and the unit frames 5a and 5b as the supporting means, and generating reaction force for restricting the operation of the unit frames 5a and 5b;
A load detection switch 53 that is operated when the unit frames 5a and 5b operate against a reaction force by the elastic bodies 52g and 52g;
Have
When the shutter curtain comes into contact with an obstacle when the shutter curtain as the shielding means is unrolled and the rotation of the winding shaft 3 is restricted, the unit frames 5a and 5b operate (rotate) so that the load The configuration is such that the detection switch 53 is operated,
The control means 60 includes
When the load detection switch 53 is operated,
A relay circuit 61 for reversing the rotation direction of the winding shaft 3 by the driving means 15;
The shutter device 1 is configured.

  As a result, the electric shutter device capable of performing “obstacle detection” and “reversal control” is simple and does not require wireless signal transmission and reception and does not use digital signal processing means. And it becomes possible to set it as an inexpensive apparatus structure. In particular, the obstacle detection means 50 can be realized as a so-called mechanical configuration including the first shaft 51 and the second shaft 52, and an inexpensive configuration can be realized.

As shown in FIGS. 8 and 9,
The shutter device is
It has upper and lower limit detection means 70 for detecting when the shutter curtain is fully open and when it is fully closed,
The upper and lower limit detection means 70 includes:
An upper limit detection unit 83 for operating the upper limit detection switch 73 when the shutter curtain is fully open, in conjunction with the rotation of the winding shaft 3 and the gear mechanism;
A lower limit detection unit 84 for operating the lower limit detection switch 74 (see FIG. 5) in conjunction with the rotation of the winding shaft 3 by the gear mechanism and when the shutter curtain is fully closed;
Have
When the upper limit detection switch 73 or the lower limit detection switch 74 is operated, the control means 60 (see FIG. 5)
Having a circuit for interrupting energization to the drive means 15 (see FIG. 4);
It is to be configured.

  With such a configuration, it is possible to maintain the fully closed / open state of the shutter curtain. Further, the upper / lower limit detecting means 70 can be realized as a so-called mechanical configuration by adopting a gear mechanism, and an inexpensive configuration can be realized.

As shown in FIGS. 3 (a) and 3 (b),
The unit frames 5a and 5b are formed in a substantially cylindrical shape,
The driving means 15, the obstacle detecting means 50, and the control means 60 are disposed inside the unit frames 5a and 5b.
It is to be configured.

  Thereby, each means can be united by uniting with unit frame 5a * 5b, and the handleability at the time of an assembly or conveyance can be made favorable.

As shown in FIGS. 3 (a) and 3 (b),
The upper and lower limit detection means 70 is disposed inside the unit frames 5a and 5b.
It is to be configured.

  As a result, the upper and lower limit detecting means 70 can be integrated with the unit frames 5a and 5b to form a unit, and the handleability during assembly and transportation can be improved.

In addition, as shown in FIG.
The tip 51a of the first shaft 51 protrudes from the end of the winding shaft 3 and is configured to be detachable from the support bracket 11 disposed on the side of the winding shaft 3,
By removing the first shaft 51 from the support bracket 11 and attaching the support shaft of the winding shaft 3 that can be manually rotated to the support bracket 11,
The shield device is configured to be switchable between an electric shield device and a manual shield device.

  This makes it possible to change the electric and manual specifications. That is, the support bracket 11 can be shared between the manual shutter device and the electric shutter device. Further, by fixing the first shaft 51 of the present invention to a support bracket of an existing manual shutter device or electric shutter device, the configuration of the present invention can be applied later.

In addition, as shown in FIG.
The unit frames 5a and 5b are arranged inside the winding shaft 3.

  As a result, each of the above-described means can be housed inside the winding shaft 3, the space inside the winding shaft 3 can be used effectively, and the shutter device as a whole can be made compact.

Also, as shown in FIGS.
An obstacle detection means 50 for detecting contact of the shutter curtain with an obstacle when the shutter curtain is unwound,
A first shaft 51;
A second shaft 52 disposed between the first shaft 51 via elastic bodies 52g and 52g as operation restricting means;
A load detection switch 53 that is operated when the second shaft 52 operates against the reaction force of the 52g and 52g,
Have
The second shaft 52 is
It can be fixed to the unit frames 5a and 5b as supporting means for fixing the driving means 15 for driving the winding shaft 3 for winding the shutter curtain.
The obstacle detection means 50 is used.

  Thereby, the obstacle detection means 50 can be realized as a so-called mechanical configuration including the first shaft 51 and the second shaft 52, and an inexpensive configuration can be realized.

In addition, as shown in FIG.
The front end portion 51 a of the first shaft 51 protrudes from the end portion of the take-up shaft 3 and can be fixed to the support bracket 11 disposed on the side of the take-up shaft 3.

  Thus, for example, when the specification is changed to a manual shutter device that is manually raised and lowered instead of the embodiment described above, the first shaft 51 is removed from the support bracket 11 and the winding shaft of the manual shutter device is removed. The specification can be changed by attaching the support shaft to the support bracket 11. That is, the support bracket 11 can be shared between the manual shutter device and the electric shutter device. Further, by fixing the first shaft 51 of the present invention to a support bracket of an existing manual shutter device or electric shutter device, the configuration of the present invention can be applied later.

As shown in FIGS. 3 to 7,
Drive means 15 for rotationally driving the winding shaft 3;
Unit frames 5a and 5b as supporting means for supporting the driving means 15,
Obstacle detection means 50;
Control means 60;
A drive unit 5 having
The obstacle detection means 50 includes:
A fixed shaft 51;
Elastic bodies 52g and 52g as operation restricting means interposed between the fixed shaft 51 and the unit frames 5a and 5b as the supporting means, and generating reaction force for restricting the operation of the unit frames 5a and 5b;
A load detection switch 53 that is operated when the unit frames 5a and 5b operate against a reaction force by the elastic bodies 52g and 52g;
Have
When the shutter curtain comes into contact with an obstacle when the shutter curtain as the shielding means is unrolled and the rotation of the winding shaft 3 is restricted, the unit frames 5a and 5b operate (rotate) so that the load The configuration is such that the detection switch 53 is operated,
The control means 60 includes
When the load detection switch 53 is operated,
The driving unit 5 includes a relay circuit 61 for reversing the rotation direction of the winding shaft 3 by the driving means 15.

  As a result, the electric shutter device capable of performing “obstacle detection” and “reversal control” is simple and does not require wireless signal transmission and reception and does not use digital signal processing means. And it becomes possible to set it as an inexpensive apparatus structure. In particular, the obstacle detection means 50 can be realized as a so-called mechanical configuration including the first shaft 51 and the second shaft 52, and an inexpensive configuration can be realized.

As shown in FIGS. 8 and 9,
The drive unit is
It has upper and lower limit detection means 70 for detecting when the shutter curtain is fully open and when it is fully closed,
The upper and lower limit detection means 70 includes:
An upper limit detection unit 83 for operating the upper limit detection switch 73 when the shutter curtain is fully open, in conjunction with the rotation of the winding shaft 3 and the gear mechanism;
A lower limit detection unit 84 for operating the lower limit detection switch 74 (see FIG. 5) in conjunction with the rotation of the winding shaft 3 by the gear mechanism and when the shutter curtain is fully closed;
Have
When the upper limit detection switch 73 or the lower limit detection switch 74 is operated, the control means 60 (see FIG. 5)
Having a circuit for interrupting energization to the drive means 15 (see FIG. 4);
It is to be configured.

  With such a configuration, it is possible to maintain the fully closed / open state of the shutter curtain. Further, the upper / lower limit detecting means 70 can be realized as a so-called mechanical configuration by adopting a gear mechanism, and an inexpensive configuration can be realized.

As shown in FIGS. 3 (a) and 3 (b),
The unit frames 5a and 5b are formed in a substantially cylindrical shape,
The drive means 15, the obstacle detection means 50, the control means 60, and the upper and lower limit detection means 70 are disposed inside the unit frames 5a and 5b.
It is to be configured.

  Thereby, each means can be united by uniting with unit frame 5a * 5b, and the handleability at the time of an assembly or conveyance can be made favorable.

In addition, as shown in FIG.
The front end portion 51 a of the first shaft 51 protrudes from the end portion of the take-up shaft 3 and can be fixed to the support bracket 11 disposed on the side of the take-up shaft 3.

  Thus, for example, when the specification is changed to a manual shutter device that is manually raised and lowered instead of the embodiment described above, the first shaft 51 is removed from the support bracket 11 and the winding shaft of the manual shutter device is removed. The specification can be changed by attaching the support shaft to the support bracket 11. That is, the support bracket 11 can be shared between the manual shutter device and the electric shutter device. Further, by fixing the first shaft 51 of the present invention to a support bracket of an existing manual shutter device or electric shutter device, the configuration of the present invention can be applied later.

In addition, as shown in FIG.
The unit frames 5a and 5b are arranged inside the winding shaft 3.

  As a result, each of the above-described means can be housed inside the winding shaft 3, the space inside the winding shaft 3 can be used effectively, and the shutter device as a whole can be made compact.

Next, details of the embodiment of the obstacle detection means 150 will be described with reference to FIGS.
As shown in FIGS. 12, 13 (a), (b), and 14 (a), the obstacle detection unit 150 includes a first shaft 151 and one side end (rear end) of the first shaft 151. The second shaft 152 is provided coaxially on the outside. The front end portion 151a of the first shaft 151 is configured to be fixed to the support bracket 11 (see FIG. 3B), and a fixing hole 151b for inserting a fixing tool (not shown) into the front end portion 151a. Is formed. In addition, arm portions 151c and 151d projecting in the radial direction of the shaft are formed in the middle portion of the first shaft 151 in the axial direction. In addition, a portion protruding from the second shaft 152 in the rear end portion 151e (see FIG. 13B) of the first shaft 151 is configured to have a larger outer diameter than a portion surrounded by the second shaft 152. . Further, in the first shaft 151, a second shaft 152 is provided so as to surround a range between the arm portions 151c and 151d and the rear end portion 151e.

  Further, as shown in FIGS. 13A, 13B, and 14A, the second shaft 152 includes two halved shaft bodies 152a and 152b. The shaft bodies 152a and 152b are integrated by being fixed by the fixtures 152c and 152d while the first shaft 151 is disposed therebetween (see FIG. 14A). . In the state where the shaft bodies 152a and 152b are integrated in this way, the arm portions 151c and 151d and the rear end portion 151e (see FIG. 13B) of the first shaft 151 are respectively provided on both sides in the axial direction. By being disposed, the second shaft 152 is positioned in the axial direction with respect to the first shaft 151. Further, the second shaft 152 is configured to be slidable in the rotational direction with respect to the first shaft 151, and the angle can be changed around the first shaft 151.

  Further, as shown in FIGS. 13A, 13B, 14B, and 14C, in the shaft bodies 152a and 152b of the second shaft 152, respectively, toward the tip portion 151a side of the first shaft 151. Stopper portions 152e and 152f are projected. Further, as shown in FIG. 14B, in the arrangement facing from the rear end side of the first shaft 151, the stopper portions 152e and 152f are arranged at positions shifted from each other by 180 degrees around the axis of the first shaft 151. It has come to be. In addition, the above-described arm portions 151c and 151d protrude from the first shaft 151 so as to face the stopper portions 152e and 152f. Accordingly, in FIG. 14B, the angle of rotation of the first shaft 151 in the counterclockwise direction is such that the stopper portions 152e and 152f on the second shaft 152 side are moved to the arm portions 151c and 151d of the first shaft 151. It is defined by contact. That is, the rotation of the second shaft 152 in the counterclockwise direction is regulated by the stopper portions 152e and 152f and the arm portions 151c and 151d coming into contact with each other.

  Further, as shown in FIG. 14B, elastic bodies 152g and 152g are interposed between the stopper portion 152e and the arm portion 151c, and between the stopper portion 152f and the arm portion 151d, respectively. Due to the reaction force of the elastic bodies 152g and 152g, gaps 152h and 152h having predetermined rotation angles are formed between the stopper portion 152e and the arm portion 151c, and between the stopper portion 152f and the arm portion 151d, respectively. ing. In this embodiment, the elastic bodies 152g and 152g are made of metal springs. However, the form may be plate-like or rod-like, and the material may be made of rubber or resin. Further, the elastic bodies 152g and 152g are configured to be interposed between the first shaft 151 and the unit frame, and the elastic bodies 152g and 152g function as an operation restricting unit that generates a reaction force that restricts the rotation operation of the unit frame. It is supposed to be.

  As shown in FIG. 13A, the shaft 152 a of the second shaft 152 is provided with an action portion 152 j that protrudes toward the distal end portion 151 a of the first shaft 151. Although this action part 152j is comprised with the metal rod-shaped member and is set as the structure inserted in the shaft body 152a of the 2nd axis | shaft 152, it is good also as a structure provided in the 2nd axis | shaft 152 integrally.

  Further, as shown in FIG. 13A, on the first shaft 151, a load detection switch 153 is disposed in the vicinity of the action portion 152j. Further, as shown in FIG. 14B, in the arrangement facing from the rear end side of the first shaft 151, the load detection switch 153 is arranged on the counterclockwise direction side with respect to the action portion 152j. The movable contact piece 153a of the switch 153 is opposed to the action portion 152j. Then, as shown in FIG. 14C, when the second shaft 152 rotates counterclockwise and the action portion 152j moves in the counterclockwise direction, the movable contact of the load detection switch 153 is caused by the action portion 152j. The piece 153a is pressed. The load detection switch 153 is configured to be turned on when the movable contact piece 153a is pressed against the action portion 152j, and turned off when the movable contact piece 153a is not pressed against the action portion 152j. Then, obstacle detection is performed in a situation where the load detection switch 153 is turned on, that is, in a situation where the second shaft 152 rotates counterclockwise as shown in FIG.

Here, a situation when the second shaft 152 shown in FIG. 14C rotates, that is, a situation where an obstacle is detected by the load detection switch 153 will be described.
As shown in FIG. 1, when the seat plate 7 comes into contact with an obstacle or the like when the shutter curtain 4 is lowered, and the seat plate 7 presses the obstacle or the like from above, the rotation of the winding shaft 3 is restricted. At the same time, as shown in FIG. 3B, the rotation of the drive connecting means 13 is restricted. At this time, due to the rotational torque T1 of the drive means 15, a rotational torque T2 in the opposite direction to the rotational torque T1 is generated in the case portion of the drive transmission means 14, and accordingly, the rotational torque that rotates the unit frames 5a and 5b. T3 occurs. The rotational torque T3 becomes the rotational torque T4 that rotates the second shaft 152 of the obstacle detection means 150. Then, as shown in FIG. 14C, the rotational torque T4 resists the reaction force of the elastic bodies 152g and 152g, so that the second shaft 152 is rotated counterclockwise in the drawing. The load detecting switch 153 is turned on by the unit 152j.

  In the second embodiment described above, as shown in FIGS. 12 to 14, the action portion 152j is provided on the second shaft 152 side, and the load detection switch 153 is provided on the first shaft 151 side, so that the shutter curtain is When the seat plate comes into contact with an obstacle or the like when descending, the obstacle detection is performed by changing the relative angle between the first shaft 51 and the second shaft 152 side. The second shaft 152 is fixed to the unit frames 5a and 5b (FIG. 3B), and in the second embodiment, the relative angle between the first shaft 51 and the unit frames 5a and 5b is changed. Thus, the obstacle detection is performed.

  On the other hand, in the first embodiment, as shown in FIG. 6A, the action portion 51j is provided on the first shaft 51 side and the load detection switch 53 is provided on the substrate member 71 (support member 78) side. The obstacle detection is performed when the relative angle between the first shaft 51 and the second shaft 52 is changed, but the substrate member 71 (support member 78) is provided in the unit frames 5a and 5b (see FIG. 3 (b)), and the configuration of the first embodiment also has a configuration in which obstacle detection is performed by changing the relative angle between the first shaft 51 and the unit frames 5a and 5b. It has become.

  As can be seen from these two Examples 1 and 2, in either configuration, the obstacle is detected by changing the relative angle between the first shaft and the unit frame, and the action portion 51j ( 6 (a)) and 152j (FIG. 14 (a)) and the load detection switch 53 (FIG. 6 (a)) and 153 (FIG. 14 (a)), either one is the first shaft side, It is only necessary that the other side is the unit frame side (second shaft or substrate member (support member)). For example, in addition to the embodiment described above, an embodiment in which a load detection switch is provided on the second shaft side and an action portion is provided on the first shaft side can be considered.

  In addition, since the configuration of the present invention is to detect that the rotation of the winding shaft is restricted by contact with an obstacle by a mechanical mechanism, not only the shutter device but also the winding shaft is electrically driven. It is also possible to apply to a wide range of shielding devices. For example, for a shielding device such as an awning or a roll curtain, a device using a winding shaft, and by using the winding shaft in combination with the above-described drive unit, these shielding devices are also obstructions. Detection and reversal control can be performed. In addition, about the specific apparatus structure for controlling rotation of a winding shaft when it contacts with an obstruction, it designs suitably about each shielding apparatus.

  The present invention can be widely applied to an electric shutter device installed in every place such as a house and a store, and other forms of shielding devices such as an awning and a roll curtain.

DESCRIPTION OF SYMBOLS 1 Shutter device 2 Storage case 3 Winding shaft 4 Shutter curtain 5 Drive unit 5a Unit frame 5b Unit frame 6 Spring assembly 11 Support bracket 13 Drive connection means 14 Drive transmission means 15 Drive means 20 Operation switch 50 Obstacle detection means 53 Load detection Switch 60 control means 61 relay circuit 70 upper and lower limit detection means 73 upper limit detection switch 74 lower limit detection switch 83 upper limit detection unit 84 lower limit detection unit

Claims (13)

Drive means for rotationally driving the winding means;
Support means for supporting the drive means;
Obstacle detection means,
Control means;
A shielding device comprising:
The obstacle detection means includes
A fixed shaft;
An operation restricting means interposed between the fixed shaft and the support means and generating a reaction force for restricting the operation of the support member;
A load detection switch that is operated when the support means operates against a reaction force by the action restriction means;
Have
When the shielding means comes into contact with an obstacle when the shielding means is unrolled and the rotation of the winding means is restricted, the load detecting switch is operated by operating the support means,
The control means includes
When the load detection switch is operated,
A relay circuit for reversing the rotation direction of the winding means by the driving means;
A shielding device. The shielding device is
Upper and lower limit detection means for detecting when the shielding means is in a fully open state and when in a fully closed state,
The upper and lower limit detecting means is
An upper limit detection unit for operating the upper limit detection switch when the shielding means is fully open, in conjunction with the rotation of the winding means and the gear mechanism;
A lower limit detection unit for operating the lower limit detection switch when the shielding means is in a fully closed state in conjunction with rotation of the winding means and a gear mechanism;
Have
The control means, when the upper limit detection switch or the lower limit detection switch is operated,
Having a circuit for interrupting energization to the drive means;
The configuration,
The shielding apparatus according to claim 1, wherein: The support means is configured in a substantially cylindrical shape,
The drive means, the obstacle detection means, and the control means are disposed inside the support means.
The configuration,
The shielding device according to claim 1, wherein the shielding device is characterized in that The upper and lower limit detection means is disposed inside the support means.
It is to be configured.
The shielding device according to any one of claims 1 to 3, wherein the shielding device is characterized in that The distal end portion of the fixed shaft protrudes from the end portion of the winding means and is configured to be detachable with respect to a support bracket disposed on the side of the winding means,
By removing the fixed shaft from the support bracket and attaching the support shaft of the winding means that can be manually rotated to the support bracket,
An electric shielding device and a manual shielding device can be switched,
The shielding apparatus according to any one of claims 1 to 4, wherein the shielding apparatus is characterized in that: The support means is disposed inside the winding means.
The shielding apparatus according to any one of claims 1 to 5, wherein the shielding apparatus is characterized in that Obstacle detection means for detecting contact of the shielding means with an obstacle at the time of unwinding of the shielding means,
A fixed shaft;
A second shaft disposed between the fixed shaft and an operation restricting means;
A load detection switch that is operated when the second shaft is operated against a reaction force by the operation restricting means;
Have
The second axis is
It can be fixed to a support means for fixing a driving means for driving the winding means for winding the shielding means,
Obstacle detection means. The distal end portion of the fixed shaft protrudes from the end portion of the take-up shaft and can be fixed to a support bracket disposed on the side of the take-up shaft.
The obstacle detection means according to claim 7, wherein: Drive means for rotationally driving the winding means;
Support means for supporting the drive means;
Obstacle detection means,
Control means;
A drive unit having
The obstacle detection means includes
A fixed shaft;
An operation restricting means interposed between the fixed shaft and the support means and generating a reaction force for restricting the operation of the support member;
A load detection switch that is operated when the support means operates against a reaction force by the action restriction means;
Have
When the shielding means comes into contact with an obstacle when the shielding means is unrolled and the rotation of the winding means is restricted, the load detecting switch is operated by operating the support means,
The control means includes
When the load detection switch is operated,
A relay circuit for reversing the rotation direction of the winding means by the driving means;
Drive unit configured. The drive unit is
Upper and lower limit detection means for detecting when the shielding means is in a fully open state and when in a fully closed state,
The upper and lower limit detecting means is
An upper limit detection unit for operating the upper limit detection switch when the shielding means is fully open, in conjunction with the rotation of the winding means and the gear mechanism;
A lower limit detection unit for operating the lower limit detection switch when the shielding means is in a fully closed state in conjunction with rotation of the winding means and a gear mechanism;
Have
The control means, when the upper limit detection switch or the lower limit detection switch is operated,
Having a circuit for interrupting energization to the drive means;
The configuration,
The drive unit according to claim 9, wherein: The support means is configured in a substantially cylindrical shape,
The drive means, the obstacle detection means, the control means, and the upper and lower limit detection means are disposed inside the support means.
The configuration,
The drive unit according to claim 9 or 10, characterized by the above. The distal end portion of the fixed shaft protrudes from the end portion of the winding means and can be fixed to a support bracket disposed on the side of the winding means.
The drive unit according to any one of claims 9 to 11, wherein the drive unit is characterized. The support means is disposed inside the winding means.
The drive unit according to any one of claims 9 to 12, wherein the drive unit is characterized.

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