JP2002250188A - Shutter obstacle detection device - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To more reliably detect an obstacle of an architectural shutter while having a simple structure. A pressure-sensitive switch (5) is disposed on one side wall (4a) of a guide rail (4) so as to face the outside of the side wall (4a). A contact part 2 is provided at the lower end with a shutter curtain 1
The striker 3 extending in the direction of the side wall 4a from the contact portion 2 supports the pressure-sensitive switch 5 by the rotation of the contact portion 2. The side wall 4a is pressed from outside.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shutter obstacle detection device for detecting an obstacle in a shutter installed in an opening of a building when an obstacle is present in a passage of the shutter.

[0002]

2. Description of the Related Art Conventionally, there are the following methods for detecting a shutter obstacle. Non-contact type obstacle detection method. In this method, for example, a phototube generating source and a photodetector are provided on a guide rail of a shutter, and when the optical path is blocked by an obstacle, such a state is detected and the shutter is emergency stopped. Electrical detection type contact obstacle detection method. In this method, for example, an encoder or an overload detector is provided in the shutter drive circuit to detect a change in rotation speed or an increase in current value when the load exceeds a normal value. The shutter is urgently stopped upon detection of the contact state. Mechanical detection type contact obstacle detection method. In this method, for example, a tape switch is provided on the lower surface of a slat (seat plate) at the lowermost end of a shutter curtain or in a guide rail, and a radio transmitter for emitting a detection signal by the operation of the switch is provided on the seat plate.
On the shutter case side, a receiver is provided, and when the tape switch comes into contact with an obstacle (when the tape switch is in the guide rail, the link type pressing means presses the tape switch) , A detection signal is transmitted from a transmitter to a receiver, and a shutter driving circuit is opened via a receiving circuit to emergency stop the shutter.

[0003]

SUMMARY OF THE INVENTION The present invention, which belongs to the above-mentioned mechanical detection type contact obstacle detection method, has been devised in order to renovate and improve the conventional method. . The conventional mechanical detection type contact obstacle detection method has the following problems. That is,
A tape switch, a transmitter, and the like provided on the seat plate have a problem of battery life and have a poor external appearance. In order to improve such a point, a tape switch or the like is housed inside the side wall or the bottom of the guide rail. However, also in this case, it is necessary to provide a storage chamber for the tape switch or the like in the guide rail, and the main part of the tape switch needs to protrude from the storage chamber. Therefore, the guide rail itself is larger than the non-storage type. As a result, the guide rail body may not fit properly. Also, in order to press the tape switch or the like in the guide rail by the contact mechanism in the case of contact with an obstacle, there is an area restriction in the guide rail. The pressing means using a mechanism or the like has been complicated. The present invention
It was created in view of such circumstances, and while having a very simple structure, a pressing force necessary for reliably operating the tape switch when an obstacle is detected is built into the contact mechanism. An object of the present invention is to provide an obstacle detection device. In addition, since the above is not directly related to the gist of the present invention, the problem and the like are omitted.

[0004]

In the shutter obstacle detecting device according to the present invention, a pressure-sensitive switch is provided on one side wall of a guide rail for guiding a shutter curtain so as to extend outward from the side wall. It is arranged so that it can be rotated, and at the lower end of the shutter curtain on the same side as the side wall, a contact portion is supported so as to be rotatable around a horizontal axis parallel to the shutter curtain, and from the corresponding contact portion, A striker extending in a side wall direction presses the pressure-sensitive switch from outside the side wall by rotation of a contact portion. With this configuration, the contact portion starts rotating as soon as the lower end of the contact portion comes into contact with the obstacle, so that the pressure-sensitive switch must be securely turned on before the load of the contact portion on the obstacle increases. Can be activated. In addition, components for pressing the pressure-sensitive switch can be simplified.

[0005]

FIG. 1 shows an embodiment of the present invention.
FIG. 1 is a front view of a shutter provided with an obstacle detection device according to the present invention, and FIG.
FIG. 3 is a diagram showing various arrangements of pressure-sensitive switches provided on a guide rail. FIGS. 3 to 5 are diagrams showing a contact portion, a striker, and a pressure-sensitive switch in a normal state (a state in which there is no obstacle in the hoistway of the shutter curtain). FIG. 3 shows the contact portion, the striker. And FIG. 4 is a sectional view of a contact portion, a striker and a pressure-sensitive switch, and FIG. 5 is a plan view of a contact portion, a striker and a pressure-sensitive switch. 6 to 8
FIG. 6 is a diagram illustrating a contact portion, a striker, and a pressure-sensitive switch in an obstacle detection state (a state in which an obstacle is present in the hoistway of the shutter curtain). FIG. 6 illustrates the contact portion, the striker, and the pressure-sensitive switch. FIG. 7 is a perspective view of the mounting of the switch, FIG. 7 is a cross-sectional view of the mounting of the striker and the pressure-sensitive switch, and FIG. 8 is a plan view of the mounting of the contacting part, the striker and the pressure-sensitive switch.

Here, some definitions are given. “One of the side walls of the guide rail” refers to one of the side walls of the guide rail, whether it is on the outdoor side or the indoor side. In this case, the guide rails are erected on both sides of the building opening with guide grooves for guiding the shutter curtain facing each other. For this reason, the “guide rail” is a concept including the case of one guide rail and the case of two guide rails. Therefore, as shown in FIG. 2, “one of the side walls of the guide rail” includes one of the side walls of the left and right guide rails (FIG. 2 (A) or (C)) and one of the right and left sides of the building opening. Only one of the side walls of the guide rail (Fig. 2
(B) or (D)). Of course, the “one” in this case is the outdoor side or the indoor side. By providing a pressure-sensitive switch described later on one of the side walls of the left and right guide rails (FIG. 2A or 2C), the reliability of obstacle detection is increased. The term "pressure-sensitive switch" is a concept that includes a microswitch in addition to the tape switch used in the embodiment of the present invention. In the embodiment of the present invention,
This is an arrangement of the pressure-sensitive switch with respect to the guide rail shown in FIG. 2B, and the pressure-sensitive switch has a form in which a typical tape switch is used.

As shown in FIGS. 1 and 3, on the lower side 9 of the seat plate 7 bound at the lowermost end of the shutter curtain 1, the contact portion 2 is suspended from the seat plate 7 in a hanging manner. At least one end of the contact portion 2 has a striker 3 extending in the direction of the indoor side wall 4a of the guide rail 4, and extends vertically to the indoor side wall 4a of the guide rail 4 on the same side as the striker 3. The tape switch 5 is disposed so as to face the outside of the indoor side wall 4a. The tape switch 5
Is a device in which a conductive plate is buried oppositely in an elastic body such as silicon rubber. When the tape switch 5 is pressed, the elastic body is deformed and the buried conductive plates come into contact with each other to sense the pressed state. This tape switch 5 is electrically connected to a shutter controller 6 fixed in a shutter case 17.

At the lower end of the shutter curtain 1, there is provided a follow-type upper side 8 having an interlock portion connected to a slat directly above as shown in FIG. And 9 are continuously bound. At the indoor side edge of a horizontal surface 9a that separates the upper side 8 of the lower side 9 of the seat plate 7, a circular pivot portion 10 is hung. The lower side 9 is a long object, but the left and right guide rails 4
4 is cut in advance slightly before the found surface. That is, the lower side 9 is slightly shorter than the substantial opening width of the building. The end of the upper side 8 is extended to the inside of the guide rail 4.

The contact portion 2 is suspended from the pivotal support 9. The contact portion 2 has substantially the same length as the lower side 9 and has a hollow substantially inverted trapezoidal cross section as shown in FIG. 4, and is in contact with the indoor side end of the upper side 2a of the inverted trapezoid. An engagement groove 11 provided over the entire length of the portion 2 is rotatably and pivotally attached to the round head pivot 9. On the lower side 2b of the inverted trapezoid, a through hole (vis hole) 12 for inserting and fixing a striker 3, which will be described later, and a pocket 13 for fitting an airtight material having an opening below are provided in parallel.

As shown in FIG. 4, in the normal state, the abutment portion 2 is suspended around the conical pivot portion 10, and the center of gravity of the abutment portion 2 is outside the conical pivot portion 10. . For this reason, the contact part 2 is configured so that the lower side 2b of the inverted trapezoid faces obliquely downward on the outdoor side. Therefore, the pocket 13 is also inclined in the same direction, but this inclination is substantially in line with the draining inclination of the draining plate (table plate) 18 at the lower end of the guide rail 4. The through hole 12 which is also the lower end of the indoor side inclined side 2c
Is substantially on the drooping line of the pivot 10. Further, the outdoor side inclined side 2d facing the indoor side inclined side 2c forms a gentle curved surface swelling to the outdoor side, and this is in the clockwise direction when the contact part 2 comes into contact with the obstacle. This is for avoiding contact with the lower side 9 of the seat plate 7 when the contact portion 2 rotates.

As shown in FIG. 5, pockets 14 for inserting the base of the tape switch 5 are provided vertically on the indoor side wall 4a of the guide rail 4. The tape switch 5 whose base is inserted through the pocket 14 is configured such that the detection unit is exposed (projects) in the indoor direction.
Reference numeral 15 denotes a base frame mounting fin, and reference numeral 16 denotes a rail inner pocket for mounting an airtight material for smoothing the raising and lowering of the shutter curtain 1 and reducing frictional noise with the guide rail 4.

Here, the tape switch 5 in the normal state
The relationship between the striker 3 and the striker 3 inserted and fixed in the pocket 13 of the contact portion 2 is as shown in FIGS. That is, the striker 3 is positioned on the indoor side from the indoor end of the tape switch 5 so as to maintain the non-contact state with the tape switch 5. In the present invention, it is an essential requirement that the striker 3 be located closer to the indoor side than the indoor end of the tape switch 5 regardless of the hanging state of the contact portion 2. The guide rail 4a of the circular pivot 10 on which the contact portion 2 is suspended as long as the requirements are satisfied.
The position on the side need not necessarily be on the same perpendicular line in relation to the striker 3.

In the embodiment of the present invention configured as described above, the operation of the obstacle detecting device will be described.
In the normal state, as shown in FIGS. 3 to 5, the obstacle detection device does not work when the shutter curtain 1 moves up and down. Since the contact portion 2 is supported by the circular pivot portion 10 and is in a suspended state, even when the contact portion 2 slightly swings in the outdoor direction when the shutter curtain 1 is moved up and down, the pressing bar 3 is not moved. The tape switch 5 is not pressed. The raising and lowering of the shutter curtain 1 is automatically stopped by opening the upper limit switch and the lower limit switch attached to the shutter controller 6.

In the obstacle detection state, as shown in FIGS. 6 to 8, when an obstacle (not shown) is in the descending area of the shutter curtain 1 while the shutter curtain 1 is descending, the contact portion 2 rotates clockwise. start. As a result, when the striker 3 approaches the tape switch 5 and the contact portion 2 rotates clockwise, the striker 3 presses the tape switch 5 as shown in FIG. At this point, a detection signal indicating that an obstacle has been detected is transmitted to the shutter controller 6 so as to perform an emergency stop of the drive system. When the obstacle is removed, the drive system automatically returns.

A feature of the present invention resides in that the tape switch 5 is exposed (projects) indoors or outdoors from one side wall 4a of the guide rail 4, so that the tape switch 5 is more closed than the exposed end of the tape switch 5 at the time of contact with an obstacle. Tape switch 5 from outside by striker 3 located inside or outside
Is to be pressed. Since there is no restriction on the operation area where the tape switch 5 is provided in the guide rail 4, the mechanisms of the striker 3 and the contact portion 2 are extremely simplified. Further, the contact portion 2 is always in a pendulum state in the normal state (however, the indoor end of the horizontal surface 9a of the seat plate 7 is prevented from rotating counterclockwise on the indoor side of the engagement groove 11). Therefore, it does not completely have a pendulum state in the front-rear direction.) Even when the contact portion 2 comes into contact with an obstacle, it can easily start rotating clockwise. Therefore, the load of the shutter curtain 1 on the obstacle is reduced, and the striker 3 can press the tape switch 5 in that state, so that a synergistic effect of preventing damage to the obstacle and ensuring the operation of the tape switch 5 is expected. Can be.

In the embodiment of the present invention, the guide rail 4
Although the tape switch 5 is mounted on the indoor side wall 4a, the tape switch 5 may be mounted on the outdoor side wall 4b so as to face the outdoors. In this case, the striker 3 is also positioned outside the shutter curtain 1. Further, in the embodiment of the present invention, the representative tape switch 5 has been described as a pressure-sensitive switch, but a similar effect can be obtained by using a microswitch or the like. Incidentally, as an example of using a microswitch, a plurality of microswitches are mounted while being vertically separated from each other on the indoor side wall 4a of the guide rail 4,
A hard plate connected to each microswitch may be provided over the entire area of the guide rail 4 in the vertical direction so that at least one of the microswitches is activated by the pressing of the striker 3. This makes striker 3
Presses the plate body from the outside, so that the microswitch can be indirectly operated.

[Brief description of the drawings]

FIG. 1 is a front view of a shutter provided with an obstacle detection device according to the present invention.

FIG. 2 is a view showing various arrangements of a tape switch provided on a guide rail.

FIG. 3 is a perspective view in which a contact portion, a striker, and a tape switch are in a normal state.

FIG. 4 is a cross-sectional view in which a contact portion, a striker, and a tape switch are in a normal state.

FIG. 5 is a plan view of the contact portion, the striker, and the tape switch in a normal state.

FIG. 6 is a perspective view in which an abutting portion, a striker and a tape switch are connected in an obstacle detection state;

FIG. 7 is a cross-sectional view illustrating how a contact portion, a striker, and a tape switch are connected in an obstacle detection state.

FIG. 8 is a plan view of a contact portion, a striker, and a tape switch in an obstacle detection state.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Shutter curtain 2 Contact part 3 Striker 4 Guide rail 4a Indoor side wall 5 Tape switch 6 Shutter controller 7 Seat plate 10 Head pivot 11 Engagement groove 18 Drain plate

Claims (1)

[Claims] 1. A pressure-sensitive switch is disposed vertically on one side wall of a guide rail for guiding a shutter curtain so as to face the outside of the side wall. At the lower end, a contact portion is supported so as to be rotatable about an axis parallel and horizontal to the shutter curtain, and a striker extending from the contact portion in the direction of the side wall is rotated by the contact portion. An obstacle detecting device for a shutter, wherein a pressure-sensitive switch is pressed from outside the side wall.