JPH0330558Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a take-up shaft sliding drive device used in a support mechanism for a curtain take-up shaft in a shutter.

In the support structure for the take-up shaft in a typical shutter configuration, the take-up shaft A is horizontally mounted between bracket plates C on both sides of the shutter case B, as shown in Figures 1a and 1b. , a fixed structure is adopted, but according to such a support structure, the initial stage of winding of the slat curtain D (Figure a)
and at the end of winding (Fig. b), the guide rail E
Since the direction angle from the door stop F at the upper end toward the slat roll swings back and forth as the roll diameter increases or decreases, when the curtain D passes through the door stop F, the slats rub against the door stop F, causing friction. arise,
As a result, there are problems in that the load for opening and closing operations increases unnecessarily, making it difficult to raise and lower the curtains, or that the winding springs have to be equipped with springs with a large energy storage capacity.

In order to solve these problems, conventionally,
For example, as shown in Fig. 2a and Fig. 2b, the winding shaft A is supported so as to be horizontally slidable, and the sliding position of the shaft A is moved in accordance with the increase/decrease in the roll diameter. Various techniques have been proposed for movable support systems for the take-up shaft that prevent D from coming into contact with the doorstop F, but in all of these proposed structures, the structure is too complex and it is difficult to achieve smooth sliding movement. At present, this method has not yet been put into practical use because it is difficult to obtain the desired speed, and the movement of both ends of the shaft tends to be out of synchronization.

The present invention was developed in view of the current situation, and the purpose of the present invention is to provide a sliding take-up shaft for a shutter that has a simple structure and allows the shaft to slide smoothly. The purpose of the present invention is to provide a driving device.

Next, means for achieving the above object will be explained with reference to drawings corresponding to embodiments.

That is, the sliding drive device for the shutter take-up shaft of the present invention includes a bearing 3 fixed to the inner surface of each bracket plate 2 on both sides of the shutter case 1, and a bearing 3 that is rotatable at a predetermined position. A screw shaft 4 that is supported in the horizontal direction, a pinion 5 that is integrally formed on one side of the screw shaft 4 that extends from the axis, and internal screw holes 7a that extend perpendicularly to the axis at both ends.
A curtain winding shaft 7 is formed of a shaft formed through the curtain winding shaft 7 and the inner thread 7a thereof is screwed to each of the screw shafts 4, and a curtain winding shaft 7 is formed by a loosely fitting concentric shaft near both ends of the winding shaft 7. A winding wheel 6 and a connecting rod 1 are pivoted on the winding wheel 6 and are loosely inserted concentrically into the middle part of the winding shaft 7.
a gear wheel 9 that is connected via a wire 0 and rotates as a unit, the gear wheel 9 has a gear 9a formed on its plate surface meshing with the pinion 5, and the gear wheel 9 When one body rotates with wheel 6,
In conjunction with this, the pinion 5 and the screw shaft 4
rotates, thereby causing the curtain winding shaft 7 and the winding wheel 6 to move back and forth along the axis of the screw shaft 4.

Next, the operation of the device of the present invention will be explained.

When the curtain is lowered from the open position of the shutter, the winding wheel 6 on which the curtain is wound
rotates, and the gear wheel 9 connected thereto via the connecting rod 10 rotates. Further, the pinion 5 that meshes with the gear 9a of the gear wheel 9 rotates, and the screw shaft 4 that is continuous with the pinion 5 rotates. Then, the curtain winding shaft 7 with the internal threads 7a at both ends screwed into the threaded shaft 4 is connected to the winding wheel 6.
along the axis of the screw shaft 4 (or backward)
Move to.

In this way, when the curtain is raised to the lowest position and is in the closed position, the winding wheel 6 rotates in the opposite direction to the above, and the curtain winding shaft 7 and winding wheel 6 are connected to the screw shaft. It moves backwards (or forwards) along the axis of No. 4 in the opposite direction to the above.

In the open position of the shutter, the curtain winding wheel 6 reaches its maximum diameter after winding the curtain. Therefore, the curtain winding shaft 7 and the winding wheel 6 are moved to the position of the screw shaft 4 far from the guide rail, and the shutter is opened. In the closed position, on the contrary, it is set to move to a position close to the guide rail.

Hereinafter, the present invention will be explained based on an illustrated embodiment.

In the take-up shaft sliding drive device of the embodiment, as shown in FIGS. 3 to 6, the inner surfaces of each bracket plate 2 on both sides of the shutter case 1 are provided with:
A bearing fixture 3 oriented in the depth direction is fixedly installed,
This bearing tool 3 is mounted in the front and back direction of the shutter (pointed by arrow a).
-b), ear-shaped receiving plates 3a, 3b are protruded from both sides, and a bearing hole is bored in the center of each receiving plate 3a, 3b.

However, in the bearing holes of both lever receiving plates 3a and 3b,
Round bar portions 4a and 4b at both ends of the long screw shaft 4 are loosely fitted and supported, and the screw shaft 4 is held in place by flanges 17 at both ends of the threaded portion.

Note that the front round bar portion 4a is extended, and a spiral pinion 5 is pivotally attached and fixed thereto, so that the pinion 5 is formed integrally with the screw shaft 4.

Next, a curtain winding shaft 7 made of a pipe into which a plurality of drum-shaped winding wheels 6 are loosely fitted,
A cylindrical filler 8 is inserted and fixed at each location near both ends of the inner hole, and an inner threaded hole 7a (shown in Figure 6) is drilled at the corresponding location of the shaft 7. ,
The shaft 7 is held horizontally between both bracket plates 2 of the case 1, with internal screw holes 7a at both ends screwed into the screw shafts 4 described above.

Since the shaft 7 is supported in this manner, it is assembled so that it is prevented from rotating by passing through the screw shaft 4 and can slide back and forth on the axis of the screw shaft 4 by rotation of the screw shaft 4. It is attached.

Furthermore, a spiral gear wheel 9 is located close to the inner side of the filling place 8 on both sides of the shaft 7.
is loosely fitted and pivoted with the gear 9a side facing the side, and this gear wheel 9 is connected via connecting rods 10 that are spanned at a plurality of locations (in the illustration, three locations) on the circumference, While being rotationally connected to the winding wheel 6,
The gear 9a is meshed with the pinion 5 of the screw shaft 4.

Note that at one location on the circumferential surface of each winding wheel 6,
Hanging bases 11 made of arc plates are fastened with bolts 12, and slats 14 at the base of the curtain 13 are assembled to the unwinding ends of each hanging base 11 by engagement. The shutters are guided to left and right guide rails 16 through gap passages 15 for each door on the left and right.

Although not shown in the drawings, a coil spring for storing torque is connected between one location on the circumferential line of each winding wheel 6 and one location on the circumferential surface of the winding shaft 7. The function is to balance the weight load of the curtain 13.

Next, the operation of the sliding drive device of the embodiment configured as above will be described.

When the winding wheel 6 is rotated by manual or power operation, the left and right gear wheels 9, which rotate together with the winding wheel 6, rotate synchronously. Furthermore, the left and right screw shafts 4 are rotated in conjunction with each other through the engagement between the spiral gear 9a and the pinion 5.

As a result, both ends of the winding shaft 7 are moved in the front-rear direction by the thrust force received by the internal threaded hole 7a.

FIG. 4 shows the sliding position of the winding shaft 7 at the beginning of winding the curtain 13 (same as in FIG. 2 a), but in this state, the curtain 13
hangs down approximately perpendicularly from the circumferential surface of the roll and passes through the gap between the doorstops 15.

When the winding wheel 6 rotates in the winding direction from this state, the winding shaft 7 slides rearward following the rotation, and at the end of the winding operation, the gear wheel 9 shown by the chain line (The sliding position of the take-up shaft 7 at this time is near the rear end of the screw shaft 4), the curtain 13 passes through the doorstop 15 vertically, similar to the state shown in FIG. 2b. Therefore, even in the middle of the initial stage and the final stage, the curtain 13 always passes vertically through the door stop 15 and never comes into contact with the inner wall of the door stop 15.

In this way, in the operation of the device of the embodiment, there is no risk that the middle of the curtain 13 will come into contact with the door stop 15, so the load for opening and closing the shutter will not be increased unnecessarily, and the structure is simple. Since the shaft 7 is driven in a synchronous and interlocking manner by means of a mechanical coupling transmission, the driving operation is performed reliably and smoothly.

As described above, according to the take-up shaft sliding drive device according to the present invention, both ends of the take-up shaft are
The screw shaft attached to the bracket plate is slidably supported through the meshing of the internal thread and the external thread, and the screw shaft is integrated with the take-up wheel through the meshing between the gear and the pinion. Since it is configured to be driven by a rotating gear wheel, the simple structure eliminates the risk of the curtain coming into contact with the door stop when opening and closing, and provides stable curtain opening and closing operations. This has the effect of improving the practicality of the shutter.

[Brief explanation of the drawing]

Figures 1a and 1b are operational diagrams of a fixed support type winding shaft, Figures 2a and 2b are operational diagrams of a movable support type winding shaft, and Figure 3 is an operational diagram of the winding shaft of the present invention. FIG. 4 is a left sectional view taken along the line - in FIG. 3, FIG. 5 is a front view taken along the arrow in FIG. 4, and FIG. , a plan view of FIG. 5; 1...Shutter case, 2...Bracket plate, 3...Bearing tool, 4...Screw shaft, 5...Pinion, 6...Take-up wheel, 7...Take-up shaft,
7a...Inner screw hole, 9...Gear wheel, 9a...
...Gear, 10...Connection rod.

Claims (1)

[Scope of Claim for Utility Model Registration] A bearing 3 fixed to the inner surface of each bracket plate 2 on both sides of the shutter case 1, and a screw shaft horizontally supported in the bearing 3 so as to be rotatable at a predetermined position. 4, a pinion 5 integrally formed on one side of the axis line extension of the screw shaft 4, and an internal threaded hole 7a at both ends in a direction perpendicular to the axis line.
A curtain winding shaft 7 is formed of a shaft formed through the curtain winding shaft 7, and its inner thread 7a is screwed to each of the screw shafts 4, and a curtain winding shaft 7 is arranged concentrically near both ends of the winding shaft 7 by loose fitting. A winding wheel 6 and a connecting rod 1 are attached to the shaft and are loosely inserted concentrically into the middle part of the winding shaft 7.
a gear wheel 9 that is connected via a wire 0 and rotates as a unit, the gear wheel 9 has a gear 9a formed on its plate surface meshing with the pinion 5, and the gear wheel 9 When one body rotates with wheel 6,
In conjunction with this, the pinion 5 and the screw shaft 4
A sliding drive device for a shutter winding shaft, characterized in that the curtain winding shaft 7 and the winding wheel 6 are rotated, thereby moving the curtain winding shaft 7 and the winding wheel 6 back and forth along the axis of the screw shaft 4.