JP5904787B2 - shutter - Google Patents

Description

  The present invention relates to a shutter that winds a slat around a shaft, and more particularly to a technique for preventing the slat from being caught in the reverse direction.

  In the electric shutter provided at the opening of the building, the slat wound around the shaft is unwound at any time, and the electric switch is automatically stopped by operating the limit switch with the slat fully closed It has been known.

  In such an electric shutter, when a situation occurs in which the limit switch does not operate normally due to a failure in the electrical system, the electric switch continues to be driven without stopping even when the slat is fully closed, There is a concern that the problem that the slat is wound in the opposite direction with respect to the shaft may occur.

  In addition, “reversing the slat in the reverse direction” means that when the normal unwinding direction is the forward direction, the slat is continuously unwound while the shutter is completely closed, so that the fixed portion of the shaft and the slat is A state in which the slat turns over at the border and is wound around the shaft in the opposite direction to the forward direction.

  Therefore, as disclosed in Patent Document 1, it is generally performed to provide a structure for emergency stop of the electric switch (see Patent Document 1). In Patent Document 1, a protrusion that stands by a spring is provided on the back surface of a slat (shutter slat), and when the electric switch continues to move even after the slat reaches a normal fully closed position, a switch ( A configuration is disclosed in which an actuator) is operated to make an emergency stop.

JP 2000-145337 A

  However, in the technique as disclosed in Patent Document 1, when the slat is wound, it is necessary to store the protrusions standing by the spring in the gap between the shaft and the slat.

  For this reason, depending on the shape of the slat, it may be difficult to attach the protrusion. For example, when the slat shape is a corrugated shape (wave type slat) or the like, there arises a problem that it is not possible to secure a gap for accommodating the protrusions in the shaft and the slat.

  Further, in order to store the protrusions in the shaft and the slats, there arises a problem that the mounting position of the protrusions with respect to the slats is limited. In addition, since the mounting position of the protrusion is limited, the setting of the timing for operating the switch is also limited, and it may be difficult to set the switch to operate immediately after the reverse winding is started.

  As another problem, in the configuration of Patent Document 1, an obstacle detection sensor other than the above-described switch is used as a countermeasure when the slat contacts an obstacle during the descent and the descent of the slat is restricted. It will be necessary to provide it.

  Therefore, in view of the above points, the present invention proposes a novel structure for preventing a problem that the slat is caught in the reverse direction.

  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,
A shutter that winds a slat around a shaft,
An action body that is provided on the shaft and appears when the slat is unwound;
E Bei the abnormality detecting switch having a first acting portion which emerged the working body acts, and
The working body is provided at a predetermined position on the outer peripheral surface of the shaft so that it appears when the slat is unwound until the shutter is fully closed.
When the slat is further unwound from the fully closed state of the shutter, the action body acts on the first action portion to operate the abnormality detection switch,
Definitive after the shutter has become fully closed, a structure for preventing the entrainment of the reverse direction of the slats,
The acting body is a shutter composed of a flexible plate-like member .

Moreover, as described in claim 2 ,
The abnormality detection switch is provided at a plurality of locations at intervals in the longitudinal direction of the shaft,
In a plurality of locations in the longitudinal direction of the shaft,
A structure in which detection knowledge of entrainment of the reverse direction of the slats are made.

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

That is, in the first aspect of the invention, it is possible to detect excessive unwinding of the shutter. Moreover, since it is not the structure which provides a projection body in the slat side like the prior art, the problem regarding the accommodation or attachment position of a projection body does not arise. In addition, it is possible to prevent the slats from being caught in the reverse direction, and it is possible to prevent problems such as damage to the slats and damage to the inside of the winding device.

Further, in the invention described in claim 2 , it is possible to detect an abnormality more reliably as compared with a case where an abnormality detection switch is provided at one place in the longitudinal direction to detect an abnormality. Such a configuration is, for example, a configuration in which the length of the shaft is long and it is difficult to detect the reverse winding on the other end side of the shaft only by providing an abnormality detection switch only on one end side of the shaft. In some cases, it is particularly effective.

It is a front view which shows the outline | summary of the shutter which is one Embodiment of this invention. It is a side view which shows the outline | summary of the site | part of the shutter winding apparatus. It is a side view shown about the case where the shutter is fully closed and stopped in a normal state. It is a side view which shows about the action | operation of the switch by the action body after a shutter is fully closed. It is a side view which shows about the action | operation of the switch by the action body in the descent of a slat. It is a side view which shows about the action | operation of the switch by the action body after a shutter is fully opened. It is a figure explaining the change of the mounting position of a switch. It is a figure shown about embodiment of a shutter provided with a pipe-type slat. It is a figure shown about embodiment of a shutter provided with a wave type slat. (A) is a figure shown about embodiment which provides the group of an action body and a switch in the multiple places of the longitudinal direction of a shaft. (B) is a figure shown about embodiment which provides a long action body and a some switch in the longitudinal direction of a shaft.

  As shown in FIGS. 1 and 2, the shutter 1 includes a single shutter curtain 11 formed by connecting a plurality of long slats 10 and a winding device 40 for winding and unwinding the shutter curtain 11. It is configured.

  The upper end of the shutter curtain 11 is connected to the shaft 20 of the winding device 40. The shaft 20 is rotationally driven in forward and reverse directions by the electric switch 30, and the slat 10 (shutter curtain 11) is unwound or taken up according to the rotation of the shaft 20. The shaft 20 is rotatably provided between the left and right brackets 60 and 61 fixed to the installation wall 4, and the electric switch 30 is supported on one bracket 61.

  Both ends of the shutter curtain 11 in the width direction are guided by guide rails 2 and 3 erected from the floor portion to the ceiling portion, and lateral displacement of each slat 10 constituting the shutter curtain 11 is regulated by the guide rails 2 and 3. . The shaft 20 and the slat 10 wound around the shaft 20 are accommodated in a case 42 (see FIG. 2).

  FIG. 3 is a side view showing the case where the shutter is fully closed and stopped in a normal state. In this case, when the shaft 20 is rotated by a specified number of rotations by a limit switch 31 provided in the electric switch 30, the lower end portion of the shutter curtain 11 is stopped on the floor portion and the opening portion is opened by the shutter curtain 11. Closed state.

  Then, below the shaft 20, for example, an abnormality that the limit switch 31 does not operate occurs, and an abnormality detection for detecting that the slat 10 is further unwound as compared with a state where the shutter is fully closed. Switch 50 is provided. The abnormality detection switch 50 is attached to a support member 56 fixed to a horizontal member 55 that is horizontally mounted on brackets 60 and 61 (see FIG. 1).

  As shown in FIG. 4, the abnormality detection switch 50 is provided with a first action part 51 that is provided on the shaft 20 and on which the action body 22 that appears when the slat 10 is unwound is provided. When 22 acts on the first action part 51, the abnormality detection switch 50 detects an abnormality, and this abnormality is output to the control device 70 or a control panel (not shown) provided separately.

  In the present embodiment, the first action portion 51 of the abnormality detection switch 50 is configured by a lever-like switch formed by bending a wire-like metal member, and rotates with respect to the main body portion 53 of the abnormality detection switch 50. Configured to be possible. Moreover, the action body 22 is comprised by the plate-shaped member which has flexibility, the one end is fixed to the outer peripheral surface of the shaft 20, and the other end becomes a free end, and as shown in FIG. The first action part 51 is pressed while being hung down with respect to 20, and the first action part 51 is rotated.

  Although the specific configuration of the action body 22 is not particularly limited, as shown in FIG. 4, the first action portion 51 of the abnormality detection switch 50 is reliably rotated, and the shaft 20 is at an arbitrary position. As shown in FIG. 3, when the slat 10 is wound up by being accommodated so as to be wound around the shaft 20 between the slat 10 and the shaft 20 except when abnormal, as shown in FIG. The winding diameter (roll diameter) of the slat 10 is not affected or hardly affected (the thickness of the action body 22 is set so that the winding state of the slat 10 does not change compared to the normal winding state). It is preferable that the above requirements are satisfied.

  As an embodiment of the action body 22, for example, it is conceivable that the action body 22 is composed of a elastic rubber plate having a thickness of about 1 mm to 3 mm and a width of about 5 cm to 10 cm, and according to this, the above requirement is satisfied. Can be implemented.

  Moreover, the form of fixing of the action body 22 to the shaft 20 is not particularly limited, and adhesion by an adhesive, welding by applying heat to the action body 22, fixation using a fixing member, and the like are conceivable. However, when a fixing member is used, it is desirable that the presence of the fixing member does not affect or hardly influence the winding diameter (roll diameter) when the slat 10 is wound.

  Moreover, although it is assumed that the action body 22 is housed in a curved state along the surface of the shaft 20 between the slat 10 and the shaft 20 for a long time, the material of the action body 22 is made of rubber (made of resin or the like). Therefore, the action body 22 will be elastically restored when it appears, and in the event of an abnormality, it will surely be hung from the shaft 20 as shown in FIG. It becomes possible to act on the one action part 51 reliably.

  As shown in FIG. 3, the action body 22 further unwinds the slat 10 from the normal state, and as shown in FIG. 4, the first action is performed at the “detection required timing” when the slat 10 is excessively unwound. The shaft 51 is provided so as to act on the portion 51. By adjusting the attachment position of the action body 22 with respect to the shaft 20, the required “detection timing required” can be realized.

  Since the fixing position of the acting body 22 with respect to the shaft 20 can be selected over the entire surface of the shaft 20, that is, within a range of 360 degrees, the first acting body 22 is instantly selected when the “detection timing is required”. Setting to act on the action part 51 is possible.

  As a result, when the slat 10 is excessively unwound and a situation in which reverse staking can occur is detected, there is no time lag and an abnormality is detected instantaneously. At this time, the electric switch 30 is instantaneously stopped. By doing so, it is possible to prevent the occurrence of problems such as the reverse winding of the slats 10 due to excessive unwinding, and consequently the damage of the slats 10 and the internal damage of the winding device 40 associated therewith.

  Temporarily, in the structure which fixes a projection body to the slat side in the above-mentioned prior art, since the attachment position of a projection body is limited, when it becomes "detection required timing", abnormality cannot be detected instantly. There may be a time lag. According to the present embodiment, it is possible to prevent such a time lag from occurring.

  Further, as shown in FIG. 5, the first action part 51 is configured to prevent the slat 10 from being lowered due to the contact of the slat 10 with the obstacle 5 during the descent of the slat 10 before the shutter is fully closed. The slat 10 is loosened, and the abnormality detection switch 50 is operated by contacting a part of the slat 10 to prevent the slat 10 from being caught in the reverse direction before the shutter is fully closed. ing.

  In FIG. 5, after the seat plate 12 provided on the slat 10 disposed at the lowermost part contacts the obstacle 5 and the subsequent descent of the slat 10 is restricted, the shaft 20 further rotates. Thus, a state in which the winding diameter (roll diameter) has been swollen by the surplus slat 10 that has been unwound in the case 42 that accommodates the shaft 20 and the slat 10 is shown.

  In such a state, when the slat 10 presses the first action portion 51 of the abnormality detection switch 50, abnormality detection is performed by the abnormality detection switch 50, and driving of the electric switch 30 is stopped. The That is, the abnormality of the slat 10 bulge (the bulge of the winding diameter (roll diameter)) is detected by the abnormality detection switch 50.

  Thus, when excessive unwinding of the slat 10 occurs in the case 42 that accommodates the shaft 20 and the slat 10, first, the rotation of the shaft 20 can be stopped by detecting the swelling of the slat 10. As a result, it is possible to prevent the occurrence of a reverse winding of the slat 10 due to the shaft 20 continuing to rotate.

  Further, as shown in FIG. 6, the abnormality detection switch 50 according to the present embodiment is in contact with a part of the slat 10 when the slat 10 is wound further than when the shutter is fully opened. The second action portion 52 for actuating the switch 50 is used to prevent excessive winding of the slat 10 after the shutter is fully opened.

  FIG. 6 shows a state in which, for example, an abnormality that the limit switch 31 (FIG. 3) does not operate occurs and the winding is still continued after the shutter is fully opened, and a seat provided at the lower portion of the slat 10 is shown. It is shown that the plate 12 (a part of the slat 10) has risen to an abnormal position beyond the normal set position.

  In such a situation, when the seat plate 12 pushes up the second action portion 52, the abnormality detection switch 50 detects the abnormality.

  As a result, the rotation of the shaft 20 (see FIG. 5) can be stopped, and the slat 10 is caught in the reverse direction as the shaft 20 continues to rotate, and eventually the slat 10 is damaged or the winding device 40 is wound. The occurrence of problems such as internal damage (see FIG. 5) can be prevented.

  In the present embodiment, as shown in FIG. 6, the first action part 51 and the second action part 52 are configured to be interlocked, and an abnormality can be detected by operating one of the action parts. ing.

  Thus, in the abnormality detection switch 50, by providing one switch, both abnormality detection during unwinding and abnormality detection during winding can be realized. It is possible to reduce the production cost and realize a space-saving installation space.

  As shown in FIGS. 7A and 7B, the abnormality detection switch 50 may be provided on the adjustment members 57 and 58 capable of adjusting the position of the abnormality detection switch 50. In the present embodiment, an adjustment member 57 connected to the horizontal member 55 and an adjustment member 58 connected to the adjustment member 57 and on which the abnormality detection switch 50 is placed are configured. The connection position of the adjustment member 57 with respect to the horizontal member 55 and the connection position of the adjustment members 57 and 58 are configured to be changeable, respectively, so that the relative position of the abnormality detection switch 50 to the shaft 20 is shown in FIG. A) Adjustment is possible as in (B).

  According to this, in the above-described setting of “necessary detection timing”, the required “necessary detection timing” is realized by adjusting the mounting position of the operating body 22 with respect to the shaft 20, and the abnormality detection is performed. Also by adjusting the position of the switch 50, the “detection timing required” can be set, and the degree of freedom of adjustment can be increased.

  As described above, in this embodiment, the shutter is of a type that winds the slat 10 around the shaft 20, provided on the shaft 20, and the action body 22 that appears when the slat 10 is unwound, and the action that has appeared. The shutter includes an abnormality detection switch 50 having a first action part 51 on which the body 22 acts.

  With this configuration, it is possible to detect excessive unwinding of the shutter. Moreover, since it is not the structure which provides a projection body in the slat side like the prior art, the problem regarding the accommodation or attachment position of a projection body does not arise.

  In addition, although the structure which provides the extra length slat and operates the switch for abnormality detection with the slat wound in the reverse direction is also considered, since it is necessary to provide an extra slat in this case, it requires cost. Become. According to the present invention, since only the working body is provided without providing the extra length of slats, the manufacturing cost can be kept low, and the weight of the entire shutter can be reduced. .

  Further, the action body 22 is provided at a predetermined position of the shaft 20 so as to appear when the slat 10 is unwound until the shutter is fully closed, and the slats are further increased than the state where the shutter is fully closed. When 10 is unwound, the action body 22 acts on the first action portion 51 to operate the abnormality detection switch 50, and the slat 10 is wound in the reverse direction after the shutter is fully closed. It is intended to prevent this.

  With this configuration, it is possible to prevent the slat 10 from being caught in the reverse direction, and the occurrence of problems such as damage to the slat 10 and damage to the inside of the winding device 40 can be prevented.

  Further, FIG. 8 is a diagram showing an embodiment of a shutter including a pipe-type slat 10A. Even in the case of such a pipe-type slat 10A, the working body 22 is fixed only to the shaft 20 side. In addition, since it is not necessary to fix the working body 22 to the pipe-type slat 10A side, the present invention can be implemented.

  Similarly, FIG. 9 is a diagram showing an embodiment of a shutter including a wave type slat 10B. Even in the case of such a wave type slat 10B, the mode in which the action body 22 is fixed only to the shaft 20 side. Furthermore, since it is not necessary to fix the action body 22 to the corrugated slat 10B side, the present invention can be implemented.

  Thus, according to the present invention, the present invention can be applied to any form of slat without selecting the form of the slat. The present invention is also applicable to a `` sheet shutter '' in which the shutter curtain is configured with a flexible sheet, in addition to the shutter curtain configured by connecting the slats as described above. When excessive winding, excessive unwinding and accompanying reverse winding occur, the sheet is damaged due to excessive stress applied to the sheet, or the excessive portion of the excessively unwound sheet It is possible to prevent the occurrence of problems such as damage due to contact with a part.

  Further, as shown in FIGS. 10A and 10B, the abnormality detection switch 50 is provided at a plurality of locations at intervals in the longitudinal direction of the shaft 20, and at the plurality of locations in the longitudinal direction of the shaft 20, It is configured to detect reverse winding and / or to detect excessive slat winding.

  FIG. 10A shows an example in which the action bodies 22A are attached to a plurality of locations of the shaft 20 at intervals, and the abnormality detection switch 50 is arranged at a position where each action body 22 is acted. For example, each operating body 22 individually acts on each abnormality detection switch 50, and abnormality detection is performed.

  In FIG. 10 (B), a single acting body 22B having a wide width is provided on the shaft 20, and the abnormality detection is performed by operating each abnormality detecting switch 50 with the single acting body 22.

  As described above, abnormality detection is performed at a plurality of positions in the longitudinal direction of the shaft 20, so that the abnormality detection switch 50 is provided at one position in the longitudinal direction of the shaft 20 to detect the abnormality more reliably. It is possible to detect abnormalities. In such a configuration, for example, when the shaft 20 is long and only the abnormality detection switch 50 is provided only on one end side of the shaft 20, the reverse winding on the other end side of the shaft 20 is detected. This is particularly effective when the configuration is difficult to perform.

  Further, in addition to the situation described in the above embodiment, for example, in a situation where the brake of the electric switch is released and the slat is lowered by its own weight in the event of a disaster, the reverse direction due to the rotational inertia of the shaft when the slat is fully closed A use form is also conceivable in which an abnormality detection switch detects that the winding diameter has bulged due to entrainment or contact with an obstacle.

  In the above embodiment, an electric shutter is used. However, an unintended slat entrainment in the reverse direction occurs when an operating body and an abnormality detection switch are provided in a manual shutter without an electric switch. It is also possible to adopt a configuration in which an abnormality is detected in the event of a failure.

  The present invention can be widely applied as a technique for detecting the reverse entrainment of a shutter slat.

DESCRIPTION OF SYMBOLS 1 Shutter 2 Guide rail 5 Obstacle 10 Slat 11 Shutter curtain 12 Seat plate 20 Shaft 22 Action body 30 Electric switch 31 Limit switch 40 Winding device 42 Case 50 Abnormality detection switch 51 First action part 52 Second action part 53 Main body 55 Horizontal member 56 Support member 60 Bracket

Claims (2)

A shutter that winds a slat around a shaft,
An action body that is provided on the shaft and appears when the slat is unwound;
E Bei the abnormality detecting switch having a first acting portion which emerged the working body acts, and
The working body is provided at a predetermined position on the outer peripheral surface of the shaft so that it appears when the slat is unwound until the shutter is fully closed.
When the slat is further unwound from the fully closed state of the shutter, the action body acts on the first action portion to operate the abnormality detection switch,
Definitive after the shutter has become fully closed, a structure for preventing the entrainment of the reverse direction of the slats,
The acting body is configured by a plate member having flexibility.
shutter. The abnormality detection switch is provided at a plurality of locations at intervals in the longitudinal direction of the shaft,
In a plurality of locations in the longitudinal direction of the shaft,
A structure in which detection knowledge of entrainment of the reverse direction of the slats is made,
The shutter according to claim 1, wherein:

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