JP3755129B2 - Shutter obstacle detection device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an obstacle detection device for a shutter that detects an obstacle when there is an obstacle in a shutter passage in a shutter installed in an opening of a building.
[0002]
[Prior art]
Conventional shutter obstacle detection methods include the following. (1) Non-contact type obstacle detection method. In this method, for example, a phototube generation source and a light receiver are provided on a guide rail of a shutter, and when the optical path is blocked by an obstacle, the state is detected and the shutter is urgently stopped. (2) Electrically detected contact type obstacle detection method. In this method, for example, an encoder or an overload detector is provided in the shutter drive circuit to detect changes such as a change in rotational speed or an increase in current value when the load exceeds a normal value, and the shutter curtain becomes an obstacle. The shutter is urgently stopped by detecting the contact state. (3) Mechanical detection type contact type obstacle detection method. In this method, for example, a tape switch is provided on the lower surface of the lowermost slat (seat plate) of the shutter curtain or in the guide rail, and a radio transmitter that generates a detection signal by the operation of the switch is provided on the seat plate. In the transmitter, when the receiver is provided and the tape switch is in contact with an obstacle (when the tape switch is in the guide rail, the link type pressing means presses the tape switch), the transmitter is operated. A detection signal is emitted from the receiver to the receiver, and a shutter drive circuit is opened via the reception circuit to urgently stop the shutter.
[0003]
[Problems to be solved by the invention]
The present invention belongs to the above-mentioned mechanical detection type contact type obstacle detection method (3), and was created in order to renovate the conventional method and make it more reliable. By the way, the conventional mechanical detection type contact type obstacle detection method has the following problems. That is, in the case where a tape switch, a transmitter, etc. are provided on the seat plate, there is a problem of battery life, and further, the appearance is poor. In order to improve such a point, a tape switch or the like that accommodates the inside or the bottom of the guide rail has been devised. However, even in this case, it is necessary to provide a storage chamber such as a tape switch in the guide rail, and the main part of the tape switch needs to protrude from the storage chamber, so the guide rail itself is larger than the non-storage type. As a result, there is a case where the guide rail main body is troubled. Moreover, in order to press the tape switch etc. in a guide rail by the contact mechanism at the time of contact | abutting an obstruction, since it has the area | region restrictions in a guide rail, in order to ensure required pressing force, a link The pressing means using a mechanism or the like has become complicated. The present invention has been made in view of such circumstances, and has an extremely simple structure, but the contact mechanism has a pressing force necessary to reliably operate the tape switch when an obstacle is detected. It is an object of the present invention to provide an obstacle detection device for a shutter that has been moved. Note that problems (1) and (2) are omitted because they are not directly related to the gist of the present invention.
[0004]
[Means for Solving the Problems]
In the shutter obstacle detection device according to the present invention, a pressure sensitive switch is arranged on one side wall of a guide rail for guiding a shutter curtain so as to face the outside of the side wall in the vertical direction. At the lower end of the shutter curtain on the same side as that, the abutment is supported so as to be rotatable about a parallel and horizontal axis centered on the shutter curtain, and opposed to the outside from the front end of the pressure sensitive switch side wall. wherein the striker from the abutment portion so as to lie extending the side wall direction, said striker by the rotation of the contact portion is to press the pressure sensitive switch from the outside of the side wall It is what. As a result, the abutting portion starts rotating as soon as the lower end of the abutting portion abuts on the obstacle, so that the pressure sensitive switch can be surely turned on before the load on the abutting portion increases. Can be operated. In addition, it is possible to simplify the parts for pressing the pressure sensitive switch.
[0005]
DETAILED DESCRIPTION OF THE INVENTION
Next, an embodiment of the present invention will be described with reference to FIGS. 1 to 8. FIG. 1 is a front view of a shutter equipped with an obstacle detection device according to the present invention, and FIG. It is various arrangement | positioning figures of the pressure sensitive switch to provide. 3 to 5 are diagrams of contact between the contact portion, striker and pressure-sensitive switch in a normal state (which means a state in which no obstacle exists in the hoistway of the shutter curtain), and FIG. 3 shows the contact portion and striker. 4 is a contact perspective view of the contact portion, the striker and the pressure sensitive switch, and FIG. 5 is a plan view of the contact portion, the striker and the pressure sensitive switch. 6 to 8 are diagrams showing the contact between the contact portion, the striker and the pressure-sensitive switch in the obstacle detection state (the state in which there is an obstacle in the shutter curtain hoistway). FIG. FIG. 7 is a contact perspective view of the contact portion, the striker and the pressure sensitive switch, FIG. 7 is a sectional view of the contact portion, the striker and the pressure sensitive switch, and FIG. 8 is a plan view of the contact portion, the striker and the pressure sensitive switch.
[0006]
Here are some definitions. “One of the side walls of the guide rail” refers to one side wall of the guide rail, whether it is the outdoor side or the indoor side. In this case, the guide rail is erected with guide grooves for guiding the shutter curtain facing each other on both sides of the building opening. Therefore, 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 either one of the left and right guide rail side walls (FIG. 2 (A) or (C)) of the building opening, It means only one side wall of the guide rail (FIG. 2 (B) or (D)). Of course, “one” in this case is the outdoor side or the indoor side. The reliability of obstacle detection is increased by providing a pressure-sensitive switch to be described later on one of the left and right guide rail side walls (FIG. 2A or 2C). The “pressure sensitive switch” is a concept including a micro switch in addition to the tape switch used in the embodiment of the present invention. In the embodiment of the present invention, the pressure-sensitive switch shown in FIG. 2B is arranged with respect to the guide rail, and the pressure-sensitive switch is configured to use a typical tape switch.
[0007]
As shown in FIGS. 1 and 3, the abutting portion 2 is suspended from the seat plate 7 in a suspended manner on the lower side 9 of the seat plate 7 connected to the lowermost end of the shutter curtain 1. The striker 3 extends in at least one end of the portion 2 in the direction of the indoor side wall 4a of the guide rail 4, and the indoor side wall 4a of the guide rail 4 on the same side as the striker 3 extends in the vertical direction. The tape switch 5 is disposed so as to face the outside of the inner side wall 4a. The tape switch 5 has a conductive plate embedded in an elastic body such as silicon rubber so that when the tape switch 5 is pressed, the elastic body is deformed and the embedded conductive plates come into contact with each other to detect the pressed state. Is. The tape switch 5 is electrically connected to a shutter controller 6 fixed in the shutter case 17.
[0008]
At the lower end of the shutter curtain 1, there are a follow-type upper side 8 having an interlock portion connected to the slat directly above as shown in FIG. 4 at the upper end and a lower side 9 made of a substantially C-shape opening indoors. The configured seat plate 7 is continuously bound. A circular head support portion 10 is suspended from the indoor side edge of the horizontal surface 9 a that partitions the upper side 8 of the lower side 9 of the seat plate 7. Although the lower side 9 is a long object, it is cut in advance up to slightly before the finding surface of the left and right guide rails 4 and 4. That is, the lower side 9 is slightly shorter than the actual opening width of the building. Note that the end of the upper side 8 extends to the inside of the guide rail 4.
[0009]
The abutting portion 2 is suspended from the circular head support portion 9. The abutting portion 2 has substantially the same length as the lower side 9 and its cross section has a hollow substantially inverted trapezoidal shape as shown in FIG. 4, and abuts on the indoor side end of the upper side 2a of the inverted trapezoid. An engaging groove 11 provided over the entire length of the portion 2 is pivotally attached to the circular pivot portion 9 so as to be rotatable. Further, on the lower side 2b of the inverted trapezoidal shape, a through hole (screw hole) 12 for inserting and fixing a striker 3 to be described later and an airtight material insertion pocket 13 having an opening below are provided in parallel.
[0010]
As shown in FIG. 4, in the normal state, the contact portion 2 is suspended from the circular pivot support portion 10, and the center of gravity of the contact portion 2 is on the outdoor side from the circular pivot support portion 10. For this reason, the abutting portion 2 is such that the lower side 2b of the inverted trapezoid faces the outdoor side obliquely downward. Therefore, the pocket 13 is also inclined in the same direction, and this inclination is substantially along the draining inclination of the draining plate (saddle plate) 18 at the lower end of the guide rail 4. Further, the through-hole 12 which is also the lower end of the indoor side inclined side 2 c is on a substantially drooping line of the circular pivot portion 10. Further, the outdoor-side inclined side 2d that faces the indoor-side inclined side 2c forms a gently curved surface that bulges to the outdoor side. This is for avoiding contact with the lower side 9 of the seat plate 7 when the contact portion 2 rotates.
[0011]
As shown in FIG. 5, the indoor side wall 4a of the guide rail 4 is provided with a pocket 14 extending vertically through which the base of the tape switch 5 is inserted. In the tape switch 5 having the base portion inserted into the pocket 14, the detection portion is exposed (protruded) in the indoor direction. Reference numeral 15 denotes a base frame mounting fin, and 16 denotes a rail inner pocket for mounting an airtight material for making the shutter curtain 1 move up and down more smoothly and reducing frictional noise with the guide rail 4.
[0012]
Here, the relationship between the tape switch 5 in the normal state 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 indoors from the indoor tip of the tape switch 5 so as to maintain a non-contact state with the tape switch 5. In the present invention, it is an indispensable requirement that the striker 3 be positioned on the indoor side from the indoor side tip of the tape switch 5 regardless of the suspended state of the contact portion 2. In addition, as long as this requirement is satisfied, the position on the guide rail 4a side of the circular pivot portion 10 on which the contact portion 2 is suspended does not necessarily have to be on the same vertical line in relation to the striker 3. .
[0013]
In the embodiment of the present invention configured as described above, the operation of the obstacle detection device will be described. In a normal state, as shown in FIGS. 3 to 5, the obstacle detection device does not work when the shutter curtain 1 is raised or lowered. Since the abutting part 2 is pivotally supported by the circular pivot part 10 and is in a suspended state, the pressing bar 3 does not move even if the abutting part 2 is slightly shaken in the outdoor direction when the shutter curtain 1 is raised or lowered. The tape switch 5 is not pressed. The raising / lowering of the shutter curtain 1 is automatically stopped by opening the upper limit and lower limit switches attached to the shutter controller 6.
[0014]
In the obstacle detection state, as shown in FIGS. 6 to 8, when an obstacle (not shown) is in the lowering region of the shutter curtain 1 while the shutter curtain 1 is being lowered, the contact portion 2 starts to rotate clockwise. As a result, when the striker 3 approaches the tape switch 5 and further the contact portion 2 rotates in the clockwise direction, the striker 3 presses the tape switch 5 as shown in FIG. At this time, a detection signal that detects an obstacle is transmitted to the shutter controller 6 so that the emergency stop of the drive system is performed. If the obstacle is removed, the drive system automatically returns.
[0015]
A feature of the present invention is that the tape switch 5 is exposed (projected) indoors or outdoors from one side wall 4a of the guide rail 4, and when the obstacle comes into contact with the tape switch 5, the tape switch 5 is indoors or out of the exposed tip. The tape switch 5 is pressed from the outside by the striker 3 located outside. Since there is no restriction of the working area in which the tape switch 5 is provided in the guide rail 4, the mechanism of the striker 3 and the contact portion 2 is extremely simplified. Further, since the contact portion 2 is always in a pendulum state in a normal state (however, the indoor side end portion of the horizontal surface 9a of the seat plate 7 is prevented from rotating counterclockwise on the indoor side side of the engagement groove 11). Therefore, even if the abutment portion 2 abuts against an obstacle, the rotation can be easily started in the clockwise direction. Therefore, since 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, a synergistic effect of preventing the obstacle damage and ensuring the reliable operation of the tape switch 5 is expected. Can do.
[0016]
In the embodiment of the present invention, the tape switch 5 is mounted on the indoor side wall 4a of the guide rail 4. However, the tape switch 5 may be mounted so as to face the outdoor side wall 4b. In this case, the striker 3 is also positioned on the outdoor side of the shutter curtain 1. In the embodiment of the present invention, the typical tape switch 5 is used as the pressure-sensitive switch. However, even if a microswitch or the like is used, the same effect can be obtained. Incidentally, as an example of using a microswitch, a plurality of microswitches are mounted separately in the vertical direction of the indoor side wall 4a of the guide rail 4, and at least one of the microswitches is operated by pressing of the striker 3. What is necessary is just to provide the hard board body connected with each microswitch over the up-down direction whole region of the guide rail 4. FIG. As a result, the striker 3 presses the plate body from the outside, so that the microswitch can be operated indirectly.
[Brief description of the drawings]
FIG. 1 is a front view of a shutter including an obstacle detection device according to the present invention.
FIG. 2 is a layout view of various tape switches provided on a guide rail.
FIG. 3 is a perspective view of a contact portion, a striker, and a tape switch in a normal state.
FIG. 4 is a cross-sectional view of the contact portion, striker and tape switch in a normal state.
FIG. 5 is a plan view of the contact portion, striker and tape switch in the normal state.
FIG. 6 is a perspective view of the contact portion, striker and tape switch in the obstacle detection state.
FIG. 7 is a cross-sectional view of the contact portion, striker and tape switch in the obstacle detection state.
FIG. 8 is a plan view of the contact portion, striker and tape switch in the 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 Round head pivot part 11 Engagement groove 18 Drain plate

Claims (1)

A pressure-sensitive switch is arranged on one side wall of the guide rail that guides the shutter curtain so as to face the outside of the side wall in the vertical direction, and is in contact with the lower end of the shutter curtain on the same side as the side wall. The striker is supported from the abutting portion so as to be opposed to the outer end of the pressure-sensitive switch side wall , while being supported so as to be rotatable around a horizontal axis parallel to the shutter curtain. the above-extending side wall direction, the striker shutter obstacle detection device is characterized in that so as to press the pressure sensitive switch from the outside of the side wall by the rotation of the contact portion.

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