JPH0247200Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a compact shutter winding shaft opening/closing device that allows the shutter to be raised and lowered easily using a plurality of shafts.

Conventionally, various efforts have been made to reduce the size of shutter cases in order to effectively utilize the indoor space of buildings. However, with conventional shutter winding devices, the height of the case is very high;
Moreover, since it requires a large area, it is very difficult to select the installation location. Therefore, the reduction and installation of shutter cases has become an important issue. The present applicant also previously applied for patent application No. 43691 in 1972.
Although these devices are extremely compact, there are many difficulties in using them.
Moreover, since the structure is very complicated, it is very difficult to implement and manufacture, and there are many disadvantages such as being economically disadvantageous.

Therefore, this invention was devised to solve these conventional drawbacks.The shutter case was significantly reduced in size to provide a device that could be opened and closed safely and reliably, and was highly economical. Its main components are:
A winding shaft and a guide shaft are rotatably mounted on the side wall of the shutter case, and the mounting position of the rear winding shaft is pivotally mounted above the horizontal position of the front guide shaft. In addition, a pulley that enables the endless belt, which is installed between the winding shaft and the guide shaft, is fitted from the outer periphery, and a gap equal to the width of the endless belt is provided on both sides of the pulley. It has a fixed pulley protection foil. Further, a support frame is provided between the winding shaft and the guide shaft on the side walls 5, and is provided with a holder with a roller on the outside to prevent the winding shaft from moving toward the center. Therefore, according to this invention, the shutter case can be significantly downsized, the lowering action of the shutter can be made very light and quick, and the pulley that operates the endless tuning band can be held between the pulley protection foils. As a result, even after long-term use, there is no need to worry about it becoming easily damaged due to rattling or movement.

Next, an embodiment of this invention will be explained with reference to a drawing.
A flat shutter case 4 of various shapes is attached to the housing. Inside the shutter case 4, there is a parallel winding shaft 2 for raising and lowering the shutter 1;
The guide shaft 3 is supported by bearings 10, 10 provided on the side walls 5, 5 of the shutter case 4. The winding shaft 2 attached at the rear is mounted above the horizontal position of the guide shaft 3 located at the front, so that the shutter 1 at the front is tilted. The winding shaft 2 and the guide shaft 3 are fitted with pulleys 6, 6, . . . on which the endless adjustment bands 7, 7 are mounted at at least two positions on both ends thereof from the outer periphery.
Incidentally, the upper end of the shutter 1 is connected to the endless adjustment bands 7, 7. On both sides of this pulley 6, 6,
Pulley protection foils 8, 8 are provided around the outer peripheries of the winding shaft 2 and guide shaft 3 with a gap the width of the endless tuning bands 7, 7.
are fixed in parallel. Reference numeral 9 denotes a rotating shaft at the center of the winding shaft 2 and the guide shaft 3, the tip of which is bored into the side wall 15 with the bearings 10 interposed therebetween. Next, at the end of the winding shaft 2, a shaft sprocket 13 is fixed to the rotary shaft 9, and a drive chain 1 is mounted on the shaft sprocket 13.
It is connected to the opening/closing machine 15 via 4. Reference numeral 16 indicates an adjustment wheel for the restoring spring 22 housed inside the guide shaft 3, 17 and 18 indicate support frames installed on the side walls 5 and 5, respectively, and the support frame 17
are respectively installed between the winding shaft 2 and the guide shaft 3,
On the outside thereof, roller-equipped holders 19, 19 are attached to prevent the winding shaft 2 from moving to the center of the outside of the contact surface between the winding shaft 2 and the guide shaft 3. In addition, the support frame 1
8, as shown in FIG. 1, a loosening prevention device 20 for the shutter 1, in which rotary rollers 21, 21, . . . are fixed, is installed between them. The reference numeral 23 indicates a guide rail of the shutter 1, and the reference numeral 25 indicates a tension belt loosening prevention device for supporting the endless adjustment belts 7, 7 from loosening, as shown in FIG.

This device has the above-mentioned configuration, and to explain how to use it now, first, in order to raise and open the shutter 1, the drive chain 14 is rotated by operating the opening/closing device 15, and the drive chain 14 is installed on this. The shaft sprocket 13 is rotated, and at the same time as this rotation, the winding shaft 2 is also rotated in the pulling direction, and the pulley 6 is rotated.
The endless adjustment belt 7 that meshes with the belt 7 also operates, and the guide shaft 3 located in the front also rotates in conjunction with the endless adjustment belt 7. At this time, the shutter 1 connected to the endless belt 7 is wound around the outer periphery of the endless belt 7 and released. Next, in order to close the shutter 1, the opening/closing device 15 is operated in the reverse direction to perform the opposite operation. At this time, the shutter 1 is fully closed due to its own weight and the assistance of the restoring spring 22.

As described above, according to the device of this invention, the shutter device itself can be significantly reduced in size, and unlike the conventional single-shaft winding device, it does not have the drawback that the height of the shutter case becomes very large. The height is only about half that of the conventional one, making it possible to use the area significantly more effectively. Since the parallel winding shaft is mounted above the horizontal position of the guide shaft, the shutter is always held tilted forward, and when the shutter is lowered, it can be lowered quickly and reliably. It has the excellent effect of accurately assisting descent while operating. Furthermore, since the pulley is fixed to the winding shaft and the guide shaft, the endless tuning belt to be erected can be reliably connected and movable, and there is also the effect of sufficiently eliminating worries such as slipping and breakage. Furthermore, the winding shaft and the guide shaft are always rotated at predetermined positions by means of holders with rollers installed on the outside of the support frame installed on the side wall, and are prevented from moving to the center. It has the excellent effect of reliably preventing the adjustment band and shutter from loosening and ensuring smooth operation over a long period of time.

[Brief explanation of the drawing]

The drawings show an embodiment of this device; Fig. 1 is a vertical cross-sectional side view of the device, Fig. 2 is a cross-sectional plan view with a portion cut out, and Fig. 3 is an exploded view with a portion of the main part removed. It is a slope view. 1 is a shutter, 2 is a winding shaft, 3 is a guide shaft, 4 is a shutter case, 5 is a side wall, 6 is a pulley, 7 is an endless tuning band, 8 is a pulley protection foil, 9 is a rotating shaft, 11 , 12 is a shaft hole, 13 is a shaft sprocket, 14 is a drive chain, 17
19 is a support frame, 19 is a holder with a roller, 22 is a restoring spring, and 25 is a tension belt loosening prevention device.

Claims (1)

[Scope of utility model registration request] A winding shaft 2 and a guide shaft 3 are supported by bearings 10, 10 at a predetermined interval on opposing side walls 5, 5 of the shutter case 4, and the winding shaft 2 is positioned at the horizontal position of the guide shaft 3. The winding shaft 2 is
And on the guide shaft 3, pulleys 6, 6 on which endless adjustment belts 7, 7 are installed are fitted and fixed from the outer periphery at least at two or more places on both ends, and on both sides of the said pulleys 6, 6, the endless adjustment bands 7, 7 are fitted and fixed. The winding shaft 2 is provided with a gap equal to the width of the bands 7, 7.
Pulley protection foils 8, 8 are fixed to the outer peripheries of the winding shaft 2 and the guide shaft 3, and pulley protection foils 8, 8 are fixed to the outer peripheries of the winding shaft 2 and the guide shaft 3 on the side walls 5, 5. Support frames 17, 17 are installed on the side walls 5, 5 to face each other between the winding shaft 2 and the guide shaft 3. 2. An opening/closing device for a shutter winding shaft, characterized in that roller-equipped holders 19, 19 for preventing movement are fixed to the outside of the guide shaft 3 and the contact surface.