JPS6328308Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is a winding shutter curtain that adjusts the abutting position of a buffer spring provided in order to reduce the impact when winding up a shutter curtain that is rolled up by the stored force of a winding spring. This invention relates to a buffer spring adjustment device.

In general, for manually operated shutters that use the stored force of a hoisting spring to raise and lower the shutter curtain to open and close an opening, when the shutter curtain is hoisted up, the shutter curtain tends to fall under its own weight. The load applied decreases rapidly as the shutter curtain is hoisted onto the hoisting wheel.
For this reason, during the winding operation, the stored force of the winding spring increases significantly from the middle of the winding operation, and the winding speed of the shutter curtain rapidly increases, causing a large impact when the shutter curtain is fully opened. Therefore, in addition to the hoisting spring, a buffer spring with one end fixed on the hoisting shaft side is provided, and the engagement of the actuating body is moved in the axial direction of the hoisting shaft, but rotation around the axis is restricted. Let the piece protrude from the gap between the coils of the buffer spring,
At an appropriate hoisting position of the hoisting wheel, the engaging piece is brought into contact with an engaging portion provided on the free end side of the buffer spring, and the buffer spring is torsionally driven to resist the accumulated force of the hoisting spring. It was designed to provide a directional storage force to eliminate the rapid rise of the shutter curtain. By the way, the position where the engaging piece on the operating body side collides with the engaging part on the buffer spring side must be adjusted for each site depending on the size of the opening, the material of the winding spring and buffer spring, and variations in performance. There is a need to. However, conventionally, the abutment position of the engagement piece is determined by rotating an adjustment plate to which one end of the buffer spring is fixed around the axis of the hoisting shaft, and then bolting it to a support plate fixed to the hoisting shaft. Since this was done by fixing the screws in place, the adjustment was troublesome and required a lot of work time, and the structure was also complicated.

The present invention was devised in order to eliminate these drawbacks in view of the above-mentioned actual situation, and there is no need to separately provide an adjustment plate for adjusting the abutting position between the buffer spring and the actuating body. The object of the present invention is to provide a winding shock spring adjusting device for a shutter that can adjust the abutment position with a one-touch operation by turning only the operating body in the axial direction.

The structure of the present invention will be explained based on an embodiment shown in the drawings. 1 is an immovable winding shaft fixed to a bracket of a shutter case;
The winding shaft 1 includes winding wheels 2, 3, 4.
is rotatably mounted therethrough, and stays 5, 5 are suspended from its circumferential surface so as to rotate together. On the arc of the winding wheels 2, 3 on both sides of the winding down wheels 2, 3, 4, a winding spring 6, one end of which is fixed to the winding shaft, is used to wind up the shutter curtain. It is fixed with the necessary storage power added. On the arc of the central hoisting wheel 3, the other end of a buffer spring 7 having a U-shaped locking portion 7a formed at one end is fixed.

Reference numeral 8 denotes an actuating body in which a cylindrical portion 8a is loosely fitted to the hoisting shaft 1, and one side of the cylindrical portion 8a has a plurality of guide grooves 9 facing in the axial direction with one end open. (Four pieces in this embodiment) are engraved. Furthermore, a locking piece 8b that projects from the coil gap of the buffer spring 7 is provided at the other end of the cylindrical portion 8. Since the regulating pin 10 provided on the hoisting shaft 1 is loosely fitted into the long groove 9, the actuating body 8 can freely move in the axial direction, but its rotation around the axial center is restricted. That is, the actuating body 8 includes the hoisting wheels 2, 3,
4 moves in the axial direction within the range of the long groove 9, and the locking piece 8b engages with the locking portion 7a of the buffer spring 7 at the appropriate winding position of the winding wheels 2, 3, and 4. The buffer spring 7 is torsionally driven by the further winding movement of the winding wheels 2, 3, and 4. Then, when the shutter curtain is fully closed, the operating body 8
3 and 4 are not covered with shutter curtains, and with the operating body 8 moved furthest toward the hoisting wheel 4, the hoisting wheels 2 and 4 are forcibly pushed in the axial direction. When the actuating body 8 moves beyond the range of movement associated with the opening/closing operations of the actuators 3 and 4, the opened long groove 9 comes off the regulating pin 10 and rotation around the axis is released.

Next, the operation of the present invention constructed as described above will be explained. When the winding wheels 2, 3, and 4 to which the shutter curtain is attached are started to wind up,
A buffer spring 7 whose one end is fixed to the hoisting wheel 3 side
The actuating body 8 rotates at the same time, and in conjunction with this, the actuating piece 8b protrudes from the coil gap of the buffer spring 7.
The regulating pin 10 is guided by the long groove 9 into which it loosely fits and moves in the axial direction, and the actuating piece 8 abuts against the locking part 7a at the appropriate winding position, twisting the buffer spring 7 and releasing the winding spring 6.
It is possible to provide a stored force that resists the sudden rise of the shutter curtain, and to perform a shock-free rising operation.

In such a shutter, the torsional force stored in the buffer spring 7 needs to be adjusted for each site depending on the size of the opening, the material of the hoisting spring 6 and the buffer spring 7, variations in performance, etc. For this purpose, the position where the locking piece 8b on the operating body 8 side meets the locking portion 7a on the buffer spring 7 side may be adjusted. In the present invention, this alignment work can be done without the troublesome adjustment work associated with attaching and detaching bolts.
This can be easily performed with a one-touch operation using the operating body 8. That is, in the present invention, since one end of the long guide groove 9 formed to guide the movement of the operating body 8 in the axial direction is open, when the shutter curtain is fully closed, in other words, the winding wheels 2 and 3 , 4 with the shutter curtain not wrapped around the operating body 8.
If the long groove 9 is removed from the regulating pin 10 by a one-touch operation of forcibly moving it in the direction of arrow A against the biasing force of the buffer spring 7, the regulation around the axis of the actuating body 8 by the regulating pin 10 is released. This allows the actuating piece 8 to rotate freely.
The abutment position b can be moved to the desired position by making it possible to freely rotate around the axis by just one-touch operation of the forcible movement of the actuating body 8 without having to unfasten the buffer spring 7 on the hoisting shaft 1 side one by one. Then, by loosely fitting the arbitrary long groove 9 corresponding to the desired adjustment position onto the regulating pin 10, the actuating body 8 immediately performs the predetermined shock-absorbing operation with the abutting position adjusted. will be carried out. Furthermore, in this embodiment, the forcible movement of the actuating body 8 is performed in a state in which the shutter curtain is fully closed, that is, in a state in which the regulating pin 10 is located closest to the opening 9a of the long groove 9. The long groove 9 can be easily removed from the regulating pin 10 with only a slight pushing force that resists the biasing force of the buffer spring 7 at the time, and even if the buffer spring 7 is to be pressed, it can be carried out without any support.

In summary, the locking piece protrudes from the gap between the coils of the buffer spring that rotates together with the hoisting wheel on the operating body that is installed in the immovable hoisting shaft.
A long guide groove is provided that engages with a regulation pin provided on the hoisting shaft side to guide and move the actuating body only in the axial direction of the hoisting shaft. The actuating body, which moves in the core direction, hits the locking piece provided at the free end of the buffer spring, and the locking piece collides with the locking piece in the middle of the winding movement to twist and drive the buffer spring, thereby hoisting the hoisting spring. In addition, the actuating body is configured such that one end of the long guide groove is open so that when the shutter is fully closed, the actuating body is forcibly moved in the axial direction beyond the position of the actuating body, and the shaft is released from the regulating pin. If the configuration is configured so that the rotation around the core can be adjusted, during the shutter hoisting operation, when the hoisting speed rapidly increases, it collides with the buffer spring and twists the buffer spring to drive it, thereby preventing collision during fully closed operation. The relaxing actuating body has a simple configuration in which one end of a long guide groove provided to guide the actuating body only in the axial direction is opened, and the actuating body is forcibly moved further from the corresponding position when the shutter is fully closed. It can be easily released from the restriction pin with just one touch operation and can freely rotate around the axis.
Therefore, the abutment position between the actuating body and the buffer spring, which needs to be adjusted for each site, can be adjusted in the axial direction of the actuating body, without any troublesome work associated with attaching and removing bolts as in the past. The long guide groove can be removed from the regulating pin and adjusted freely with just one touch operation of moving to the position, and there is no need for any special parts such as adjustment plates, etc., and the simple structure is that one end of the long guide groove is opened. The abutting position can be adjusted in a short time, and work efficiency can be greatly improved.

[Brief explanation of drawings]

The drawings show an embodiment of the shutter hoisting shock absorbing spring adjusting device according to the present invention, in which FIG. 1 is a schematic front view of the shutter hoisting shock absorbing device, and FIG. 2 is an enlarged view of the main parts. 3 is an enlarged side sectional view of the same as above; 4A, B, and C are front views, top views, and side views of the actuating body; 5A, B are views of the actuating body when fully open and fully closed. FIGS. 6A and 6B are action explanatory diagrams showing the moving state. FIGS. 6A and 6B are action explanatory diagrams showing the adjusting movement state of the operating body. In the figure, 1 is the shutter take-up shaft, 2, 3,
4 is a hoisting wheel, 5 is a stay, 6 is a hoisting spring,
7 is a buffer spring, 7a is a locking portion, 8 is an actuating body, 8a
8b is a cylindrical portion, 8b is an actuating piece, 9 is a long guide groove, and 10 is a regulating pin.

Claims (1)

[Scope of utility model registration request] The actuating body is installed through an immovable hoisting shaft, and the actuating piece protrudes from the gap between the coils of a buffer spring that rotates together with the hoisting wheel, and the actuating piece is fitted into a regulating pin provided on the hoisting shaft side. a guide long groove that guides and moves the hoisting shaft only in the axial direction of the hoisting shaft, and the actuating body that moves in the axial direction in conjunction with the upwinding movement of the hoisting wheel is provided at the free end of the buffer spring. The actuating member is configured to torsionally drive the buffer spring by the collision of the actuating piece in the middle of the winding movement to the locking portion, thereby relieving the hoisting force of the hoisting spring, and the actuating body is connected to one end of the guide long groove. A shutter characterized by being configured such that when the shutter is opened and the shutter is forcibly moved in the axial direction beyond the position of the actuating body when the shutter is fully closed, it is released from the regulating pin and the rotation around the axial center can be adjusted. Winding buffer spring adjustment device.