JPH0446069Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention is designed to prevent falling of architectural shutters such as overhead doors in which the shutter curtain is opened and closed by the rotation of the take-up shaft itself. This invention relates to a prevention device.

[Problems to be solved by the prior art and the invention] In general, this type of architectural shutter can be roughly divided into two types: the shutter curtain is moved by rotating a winding drum rotatably supported on a fixed winding shaft. There are two types of shutter curtains: one that opens and closes the shutter curtain, and one that opens and closes the shutter curtain by the rotation of the take-up shaft itself. For those that open and close curtains, the accumulator that stores energy in the winding shaft in the direction of winding up the shutter curtain is connected at one end to the winding shaft and at the other end to the building side. However, if this accumulator were to break for some reason, the take-up shaft would rotate under the weight of the shutter curtain, and as a result, the shutter curtain would suddenly open. There was a risk of falling, which was extremely dangerous. Therefore, various fall prevention devices have been devised in the past, but all of these devices are designed to restrict the descent of a falling shutter curtain. In addition, the device has to be large and complicated because it has to be installed at a location where it can be installed, which often places restrictions on the location of the shutter curtain.

[Means for Solving the Problem] The present invention was devised in view of the above-mentioned circumstances and for the purpose of providing a fall prevention device for architectural shutters that can eliminate these drawbacks. In an architectural shutter, the shutter curtain is opened and closed by rotating a take-up shaft rotatably supported on the shutter.
In order to support the other end of the accumulator, which has one end supported by the take-up shaft and stores energy so as to urge the take-up shaft in the shutter curtain opening direction, on the bracket side, the take-up shaft is An actuating member is rotatably supported, and the other end of the accumulator is supported on the actuating member, while a bracket is provided integrally with the bracket to prevent rotation of the actuating member. By providing a rotation regulating member that restricts the rotation within a predetermined angular range, and supporting the actuating member against one regulating portion of the rotation regulating member using the biasing force of the accumulator, the other end of the accumulator is configured to be supported on the bracket side, and
Furthermore, an auxiliary ammunition device is interposed between the operating member and the rotation regulating member, the biasing force is smaller than that of the energy storage device, and the biasing direction is opposite to that of the energy storage device, A detection switch detects the rotation of the actuating member by rotating the actuating member by the urging force of the auxiliary ammunition so that it comes into contact with the other regulating part of the rotation regulating member as the urging force of the accumulator ammunition disappears. The present invention is characterized in that a braking mechanism for preventing the winding shaft from falling is activated based on the detection of the winding shaft.

With this configuration, the present invention immediately detects the occurrence of breakage of the accumulator and applies braking to the take-up shaft to prevent the shutter curtain from falling unexpectedly. It has been made possible to do so.

[Example] Next, an example of the present invention will be described based on the drawings. In the drawing, reference numeral 1 denotes a shutter curtain for an overhead door, which is an example of an architectural shutter. It is designed to be able to open and close between a closed position where it moves up to close the opening, and an open position where it rises to open the opening. Reference numeral 3 denotes an actuating wire whose one end is connected to the lower end of the shutter curtain 1, and the other end of the actuating wire 3 is connected to a pulley 5 which is integrally fixed to the winding shaft 4. The winding shaft 4 is rotatably supported on the building side through bearings 6 at both ends thereof.
As will be described later, the operating wire 3 is wound around the pulley 5 or unwound by the forward and reverse rotation of the winding shaft 4, so that the shutter curtain 1 opens and closes the opening. It's getting old.

Reference numeral 7 denotes an accumulator bomb consisting of a coil bullet wound around a winding shaft 4, one end of which is connected to a winding plug 8 fixed to the winding shaft 4, The other end is connected to an anchor plug 9 fitted externally so as to be rotatable relative to the winding shaft 4. On the other hand, 10 is a bracket fixed to the building side via bolts 11.
The winding shaft 4 is rotatably supported on the bracket 10 via a bearing 10a, and a fixing flange 13 (a rotation regulating member of the present invention) is attached to the bracket 10 via a bolt 12. ) are integrally fixed. Furthermore, a plurality of engagement claws 13b are provided on the fixed flange 13 and protruded at predetermined intervals around the axis. On the other hand, an actuating flange 14 (corresponding to the actuating member of the present invention) that is integrally fixed to the anchor plug 9 via bolts 14a is also provided with engaging claws 14b, and these engaging claws 13b and 14b are loosely engaged, so that both flanges 1
3 and 14 are integrally connected to each other in such a manner that they are allowed to rotate relative to each other within a predetermined angle around the axis of the winding shaft 4. And both flanges 13,
Reference numeral 14 indicates an engaging claw 13 as shown in FIG.
b, 14b are engaged with each other, and thereby the operating flange 14 is connected to the operating flange 1.
The stored force applied to 4 is received by the fixed flange 13, and rotation in the direction of storage is restricted, while rotation in the opposite direction to the storage direction is permitted. , the winding shaft 4 is configured to store energy in the rotation direction toward the opening side of the shutter curtain 1, that is, toward the upward movement side, but in this state, the detection projection 14c protruding from the operating flange 14
is in contact with the detection switch 15, and the detection switch 15 is in an open state. Reference numeral 16 denotes a tension ammunition machine (corresponding to the auxiliary ammunition machine of the present invention) interposed between the flanges 13 and 14, and the tension ammunition machine 16 is different from the storage direction of the energy storage ammunition machine 7. It is designed to be pulled in the opposite direction with a weak tensile force (storage force of the accumulator 7 >> tensile force of the tension bomb 16). Then, when the accumulator 7 breaks and the accumulating force disappears, the operating flange 14 is moved to the tension ammunition 16.
The engaging claw 1 shown in FIG.
3b and 14b are rotated relative to each other in the opposite direction to the charging direction of the accumulator 7, whereby the detection protrusion 14c is separated from the detection switch 15, and the detection switch 15 is closed. However, damage to the storage ammunition 7 is detected. 17 is the winding shaft 4
The braking mechanism 17 is an electromagnetic brake type braking mechanism for the winding shaft 4. The braking mechanism 17 is electrically connected to a detection switch 15, and is configured to restrict rotation of the winding shaft 4 in conjunction with the closing of the detection switch 15. It is starting to perform a braking action.

In the embodiment of the present invention constructed as described above, the opening is opened and closed as before by the vertical movement of the shutter curtain 1 as described above, but for some reason the accumulator If the winding shaft 7 breaks, the present invention immediately detects this and automatically and quickly applies braking to the winding shaft 4.
This ensures that the shutter curtain 1 is prevented from falling unexpectedly. That is, the operating flange 14 is normally stored in the fixed flange 13 in the state shown in FIG. 6A by the storage force of the energy storage device 7, with rotation in the storage direction being restricted. They are interlocked so that they can absorb the force, but when the accumulator 7 breaks, this accumulated force disappears. Therefore, the operating flange 14 is rotated in the opposite direction to the energy storage direction by the tensile force of the tension bomb 16 interposed between it and the fixed flange 13, so that the operating flange 14 is in the engaged state as shown in FIG. become. As a result, the detection switch 15 separates from the detection protrusion 14c protruding from the operating flange 14 and closes, and the breakage of the accumulator 7 is detected, and in conjunction with this, the braking mechanism 17 is immediately activated. Braking is applied to the take-up shaft 4 to prevent the shutter curtain 1 from falling unexpectedly due to rotation of the take-up shaft 4.

In this way, in the present invention, the loss of the stored force due to the breakage of the accumulator 7 is prevented by rotating the operating flange 14 in the direction opposite to the accumulating direction of the accumulator 7. Since it is possible to control the descent of the shutter curtain 1 by applying a brake to the take-up shaft 4 itself in conjunction with this detection, the fall of the shutter curtain 1 when the accumulator 7 breaks is prevented. can be reliably prevented, resulting in extremely high safety. Moreover, in the present invention, since the rupture of the accumulator 7 itself can be directly detected based on the presence or absence of the accumulated force by the accumulator 7, the rupture can be detected accurately and quickly. Since the take-up shaft 4 can be automatically braked almost simultaneously with the breakage of the bullet bomber 7, the shutter curtain 1 that falls at an accelerated rate, such as a shutter curtain 1 that stops descending midway through its descent, can be automatically braked. There is no need to take any precautions such as having to stop, and there is no accumulator 7 on the take-up shaft 4.
Since the breakage detection mechanism can be installed, the structure of the detection mechanism can be made extremely compact, and there are no restrictions on where it can be placed.

It goes without saying that the present invention is not limited to the above-mentioned embodiments, and therefore, as an architectural shutter that can be implemented, it is possible to apply not only an overhead door but also a shutter using the rotation of the winding shaft itself. It can be used in any architectural shutter that opens and closes the tar curtain. In addition, the braking mechanism for the winding shaft is not an electric type such as an electromagnetic brake, but is, for example, shown in Figs. 7 and 8.
As shown in the figure, a mechanical mechanism using a ratchet gear may be used. That is, in this device, a ratchet gear 19 is integrally fixed to the winding shaft 4, and in a normal state where the accumulator 7 is not broken,
The engaging pawl 20 is in contact with the detection protrusion 14c protruding from the operating flange 14, and the ratchet gear 19 and the engaging pawl 20 are in a disengaged state, and the winding shaft 4
is designed to be able to rotate freely, but when the accumulator 7 breaks and the operating flange 14 rotates in the opposite direction to the accumulating direction, the engagement pawl 2
0 disengages from the detection protrusion 14c and moves downward, whereby the engagement pawl 20 engages with the ratchet gear 19,
The rotation of the winding shaft 4 in the downward direction of the shutter curtain 1 is restricted, and the present invention can also be implemented in this manner. In this case, it is possible to automatically restrict the rotation of the winding shaft 4 when the accumulator 7 breaks without using any electrical means, and to maintain a lowered braking state even when the accumulator 7 breaks. There is an advantage that the lower shutter curtain 1 can be rolled up, which is convenient.
In addition, 21 is a tension bullet of the engaging claw 20. Furthermore, the means for detecting the rupture of an accumulator does not necessarily have to be a detection protrusion; on the contrary, it may be a recessed part; As long as it is designed to detect rotation in any direction, any means may be used. In addition, the rotational force of the actuating flange in the opposite direction to the accumulating force does not have to be a coil bullet, but the point is that the actuating flange rotates in the opposite direction to the accumulating force when the accumulating force disappears. Needless to say, as long as it is energized, the means used will not matter.

[Operations and Effects] In summary, the present invention is constructed as described above, so that if the accumulator that stores the energy in the take-up shaft toward the open side of the shutter curtain breaks and the accumulated energy is lost, Then, the actuating member, on which the other end of the accumulator is supported, receives the accumulating force of the auxiliary ammunition and rotates in a direction opposite to the accumulating direction of the accumulator. The breakage of the bomb is automatically detected, and based on this detection, the braking mechanism to prevent the fall is activated.
The winding shaft can be braked quickly and reliably, and the shutter curtain can be prevented from falling unexpectedly, resulting in extremely high safety.

Moreover, since the breakage of the accumulator is detected by the rotation of the actuating member supporting the accumulator in the direction opposite to the accumulating direction, the breakage can be detected directly. In addition to being able to perform accurate, quick, and precise detection, the detection mechanism itself can be made lightweight and compact, and there are no restrictions on the installation location, which is an unprecedented ideal. It can be used as a fall prevention device.

[Brief explanation of the drawing]

The drawing shows one embodiment of the fall prevention device for architectural shutters according to the present invention.
The figure is an overall schematic front view of the overhead door, Figure 2 is an enlarged front view of the main part of the winding shaft, Figure 3 is a partially cutaway front view of the detection mechanism, and Figure 4 is a partially cutaway side view of the same. Figure 5 is a schematic sectional view of the same as above, Figure 6 A, B
are action explanatory diagrams showing the normal meshing state, respectively;
FIG. 7 is a partial cross-sectional front view of the detection braking mechanism showing the second embodiment;
FIG. 8 is a side view of the above braking mechanism. In the figure, 1 is a shutter curtain, 2 is a guide rail, 3 is an operating wire, 4 is a winding shaft, 5 is a pulley,
6 is a bearing, 7 is an accumulator, 8 is a winding plug, 9 is an anchor plug, 10 is a bracket,
11 and 12 are bolts, 13 is a fixed flange, 14
15 is an operating flange, 15 is a detection switch, 16 is a tension bomb, and 17 is an operating mechanism.

Claims (1)

[Scope of utility model registration request] In an architectural shutter in which the shutter curtain is opened and closed by rotation of a take-up shaft rotatably supported on a bracket, one end is supported by the take-up shaft, and the take-up shaft is connected to the shutter curtain. In order to support the other end of the accumulator, which is biased in the opening direction, on the bracket side, an actuating member is rotatably supported on the winding shaft, and the actuating member While supporting the other end of the ammunition, a rotation regulating member is provided on the bracket side, which is integrally provided on the bracket side and restricts the rotation of the operating member within a predetermined angular range. , the other end of the accumulator is supported on the bracket side by being elastically supported by one of the regulating parts of the rotation regulating member by the biasing force of the accumulator; An auxiliary bomb whose biasing force is smaller than that of the accumulator and whose biasing direction is opposite to that of the accumulator is interposed between the rotation regulating member, and the operating part is
As the biasing force of the accumulator disappears, the biasing force of the auxiliary ammunition rotates the rotation regulating member so that it comes into contact with the other regulating part, thereby activating the braking mechanism for preventing the take-up shaft from falling. A fall prevention device for architectural shutters, characterized by comprising: