JP4140120B2 - Shutter device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a shutter device, and more particularly to a shutter device in which a longitudinal end portion of a shutter curtain that is opened and closed by a motor drive is guided along a guide rail.
[0002]
[Prior art]
In this type of conventional shutter device, for example, Japanese Utility Model Laid-Open No. 4-4196, when the end slat of the shutter curtain that is descending to be fully closed interferes with an obstacle on the way, The deformation is such that the pressure sensitive switch provided in the guide rail is closed, and the control device that detects the closing of the pressure sensitive switch stops the motor to prevent an accident.
[0003]
[Problems to be solved by the invention]
However, in this conventional apparatus, it has been a cumbersome task to install the pressure sensitive switch in the guide rail. In addition, considering the waterproofness of the pressure sensitive switch, it is necessary to consider the sealing performance of related parts more than necessary, and this conventional device is not necessarily practical.
[0004]
Therefore, an object of the present invention is to provide a shutter device free from the above-described problems.
[0005]
[Means for Solving the Problems]
The technical means taken in order to solve the above-described problem is that the shutter curtain that is opened and closed by motor driving is guided along a pair of guide rails in the longitudinal direction of the shutter curtain. A link mechanism having a lever that rotates and changes as the shutter curtain descends at the end of the end slat, and extends in the vertical direction in the guide rail and is biased in one direction by the spring biasing force. And a pivotable sensing plate and disposed outside one of the guide rails, and the lever pivots when movement of the shutter curtain to the lower side of the end slat is suppressed when the shutter curtain is lowered. Accordingly, the sensing plate is rotated in the other direction against the biasing force, and the operation is performed by the rotation of the sensing plate. And a switch for stopping the motor drive is that.
[0006]
Technical means taken in claim 2 in order to solve the above-mentioned means, in the shutter device according to claim 1, obtained by interlocking the transition of the lever mechanism to the rotation displacement of forms with respect to the slat immediately above Endosura Tsu DOO That is.
Further, in order to solve the above-described means, the technical means provided in claim 3 is the shutter device according to claim 1, wherein a horizontal holding lever is extended from a slat immediately above the end slat, and the horizontal holding lever is The bending lever that changes integrally with the end slat is pivotally supported.
[0007]
[Action and effect]
According to the means (configuration) taken in claim 1 described above, when a force against the lowering of the end slat acts on the end slat (when the end slat interferes with an obstacle or sits on the lower frame). Since the switch for stopping the motor is operated through a link mechanism and a sensing plate mechanically linked to the end slats, it is not necessary to provide a switch inside the guide rail, and the above-described problems can be avoided. There is no need to separately provide a sensor for detecting the descent of the shutter curtain.
[0008]
According to the means (configuration) taken in the second aspect of the present invention, the source of the stop of the motor is the rotational displacement of the end slat, but the rotational displacement of the end slat resists the descending end slat. regardless to the site of action of the force, because always made, the reliability of the stop operation of the shutter over the curtain rises.
[0009]
【Example】
Embodiments of the present invention will be described with reference to the accompanying drawings.
[0010]
In FIG. 1, the shutter device 10 includes a shutter curtain 12. As is well known, the shutter curtain 12 is formed by connecting a large number of slats 14 (not shown) in a known manner, and grooves defined in the pair of guide rails 22 when the motor 20 is driven. It moves up and down along 22 a to open and close the opening 26 defined by the guide rail 22, the upper frame (not shown) and the lower frame 24. When the opening 26 is fully opened, the shutter curtain 12 is in a state in which the slat 14 is completely wound and is accommodated in a shutter box (not shown).
[0011]
A space 28 is formed inside the guide rail 22, and an upper end portion and a lower end portion of the guide rail 22 are closed by an upper plate 32 and a lower plate (not shown), respectively. In the space 28 of the guide rail 22, the left end portion of each slat 14 is exposed. In the space 28 of the guide rail 22, a sensing plate 40 extending in the vertical direction is mounted, and on the left side in the longitudinal direction, a screw 42, a screw 44, and a plate 46 forming a part of the guide rail 22 are mounted. The groove 48 can swing within the space 28 by a predetermined angle.
[0012]
A fan-shaped hole 50 is formed in the upper plate 32, and the upper portion of the sensing plate 40 is exposed through the hole 50. Thus, one end portion of the coil spring 52 is fixed on the upper plate 32, and the other end portion of the coil spring 52 constantly urges the upper portion of the sensing plate 40 toward the front of the drawing, and the upper plate 32. The operating lever 61 of the switch 60 placed on the top is separated from the sensing plate 40.
[0013]
The end of the slat 14 is particularly referred to as an end slat 15, and a link mechanism 70 is mounted on the left end of the end slat 15, and when the end slat 15 interferes with an obstacle while descending, For example, when a foreign object or a part of the body is sandwiched between the end slat 15 and the lower frame 24, the operating lever 72 of the link mechanism 70, which will be described in detail later, moves the sensing plate 40 to the rear side against the coil spring 52. The actuator 60 is urged to press the operating lever 61 of the switch 60. Thus, when the operation lever 61 is pressed, the switch 60 is closed. When the control device 90 recognizes the closing, the driving of the motor 20 is stopped. Thus, the end slat 15 is not further lowered, and an unexpected accident is prevented.
[0014]
In the end slat 15, a plate 17 is mounted in a lower space 14a of the slat 14 directly above, and this plate 17 has a plate 19 penetrating a longitudinal slit 14c formed in the lower wall 14b of the lower space 14a. It is connected to the upper part of the end slat 15 through the via. Thus, the end slat 15 shifts toward the slat 14 immediately above when a force is applied in the upward direction.
[0015]
The left end portion of the Et Ndosuratto 15 has a plate 74 is fixed, this plate 74, the lower end portion of the lever 72 is pivotally mounted by a pin 76. A plate 78 is fixed in the upper space 14d of the slat 14 directly above, and an upper end portion of a lever 80 is pivotally attached to the plate 78 by a pin 82. A disc 88 is fixed to the upper end of the lever 72. Thus, the central portion of the lever 72 and the lower end portion of the lever 80 are pivotally attached by the pin 84, and the upper end portion of the lever 72 rotates counterclockwise as the end slat 15 approaches the slat 14 immediately above. The disc 88 pushes the sensing plate and stops the motor 20 in the manner described above.
[0016]
In addition, when the end slat 15 is seated on the lower frame 24, the lever 72 is rotated by changing to the slat 14 side immediately above, as described above. Then, with this rotation, the disc 88 at the upper end of the lever 72 urges the sensing plate 40 to actuate the switch 60 to stop the driving of the motor 20 and stop the lowering of the shutter curtain 12 further. . For this reason, the sensing plate 40 serves as a sensor that detects the lower limit of the movement of the shutter curtain 12.
[0017]
As shown in FIG. 3, the handle 96 provided on the indoor side of the end slat 14 activates the sensor 100 installed on the right guide rail 22 so that the motor 20 stops raising the shutter curtain 12. Yes. That is, the bracket 102 of the sensor 100 is fixed to the upper indoor side of the right guide rail 22, and the lower side of the cam member 104 inserted in the space between the guide rail 22 and the bracket 102 is pinned by the pin 106. And pivotally supported by the guide rail 22. Therefore, the cam member 104 is provided with a pin 110 protruding from the long hole 108 of the bracket 102, and the movement range of the cam member 104 is restricted by the right end and the left end of the long hole 108 which is the movement range of the pin 110. The A switch 112 is fixed inside the bracket 102, and its lever 114 constantly urges the cam member 104 leftward. When the upward movement of the shutter curtain 12 reaches the upper limit, the handle 96 pivots the cam member 104 to the right to turn the lever 114 and turn on the switch 112. Then, the signal is instantaneously transmitted to the control device 90, and the control device 90 stops the motor 20. Thus, the raising of the shutter curtain 12 is completed. Thus, the upper limit and the lower limit of the movement of the shutter curtain 12 are determined.
[0018]
4 to 9 show modified examples of the end slats 15. The end slat 15 includes a pair of left and right shoes 15a that move in the groove 22a of the guide rail 22, and a central portion 15b that is positioned between the shoes 15a. Thus, the pair of shoes 15a (only one is shown) is fixed to the lower part of the slat 14 directly above, but the central part 15b is swingable with respect to the slat 14 immediately above. It is suspended from the slat 14. Further, a lever 150 protrudes from each end portion of the slat 14 directly above in a cantilever manner so as to keep the level in the outdoor direction. The distal end portion of the lever 150 receives the distal end portion of the bending lever 152 protruding from the central portion 15b of the end slat 15 in the outdoor direction in the form of a ball bearing. Thereby, the bending lever 152 can be rotated around its tip. Therefore, the lower end 24 of the central portion 15b of the end slat 15 protrudes slightly outward unless it sits on the lower frame 24 or interferes with an obstacle, and its height is higher than that of the shoe 15a. Is also set slightly lower. That is, the lower end of the central portion 15b of the end slat 15 protrudes slightly downward from the lower end of the shoe 15a.
[0019]
The lower end portion of the lever 72 is fixed to the pin 160 protruding from each end portion of the central portion 15 b of the end slat 15. The upper end portion of the lever 72 is pivotally supported by the center portion of the lever 80 by a pin 84. Therefore, the upper end of the lever 80 is pivotally supported by the end of the slat 14 immediately above by the pin 82, and a disc 88 is provided at the lower end of the lever 80. When the central portion 15b of the end slat 15 is seated on the lower frame 24, the link mechanism 70 is changed from the state of FIG. 6 to the state of FIG. 7, and the disc 88 at the tip of the lever 80 biases the sensing plate 40. . Then, the rotated sensing plate 40, that is, the sensing plate 40 changed from the state shown in FIG. 8 to the state shown in FIG. 9, operates the switch to stop the motor 20, and the descent of the shutter curtain 12 is stopped. The
[0020]
In this case, the link mechanism 70 and the sensing plate 40 need only be provided on one guide rail side, and need not be provided on the other side.
[Brief description of the drawings]
FIG. 1 is a cross-sectional perspective view of one end of a shutter device according to the present invention.
FIG. 2 is an enlarged view of a portion A in FIG.
FIG. 3 is a diagram illustrating an installation state of a sensor that detects an upper limit of movement of the shutter curtain.
FIG. 4 is a partial schematic view showing a modified example of an end slat.
5 is a schematic view showing a state in which the end slat shown in FIG. 4 is suspended from a slat directly above.
FIG. 6 is a view showing a state of an end slat, a slat immediately above, and a link mechanism that couples both when the end slat is not seated in the lower frame.
FIG. 7 is a diagram showing a state of an end slat, a slat directly above, and a link mechanism that couples both when the end slat is seated in the lower frame.
8 is a diagram showing a relationship between an end slat and a sensing plate when the link mechanism shown in FIG. 4 is not operating. FIG.
9 is a diagram showing a relationship between an end slat and a sensing plate when the link mechanism shown in FIG. 4 is operated.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Shutter apparatus 12 Shutter curtain 14 Slat 15 End slat 20 Motor 40 Sensing plate 70 Link mechanism 72 Lever 90 Control apparatus

Claims (3)

In the shutter device in which the longitudinal end of the shutter curtain that is opened and closed by the motor drive is guided along a pair of guide rails,
A link mechanism provided with a lever that rotates and changes as the shutter curtain descends at the end of the end slat of the shutter curtain;
A sensing plate that extends in the vertical direction in the guide rail and is urged in one direction by a biasing force of a spring and is rotatable.
When the downward movement of the end slat of the shutter curtain is suppressed when the shutter curtain is lowered, the lever is rotated to disengage the sensing plate. And a switch for rotating the sensor plate in the other direction and operating by the rotation of the sensing plate to stop the motor drive .   The shutter device according to claim 1, wherein the change of the link mechanism is interlocked with a rotation change that the end slat makes with respect to the slat directly above. The shutter device according to claim 1, wherein a horizontal holding lever is extended from a slat immediately above the end slat, and a bending lever that is integrally moved with the end slat is pivotally supported on the horizontal holding lever .

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