JPS6022222Y2 - Drive shaft for shutter - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a drive shaft for a shutter.

Currently, as shown in FIGS. 1 and 2, the shutter device is installed so that it continues vertically along a vertically extending guide rail 1 when closed, and at the upper end of said guide rail 1 when opened. A structure is known in which successive slats 3 are connected by a link mechanism 4 so that the slats 3 are stored vertically in a storage box 2.

That is, the guide rail 1 has a portion extending horizontally within the storage box 2 as shown in FIGS. 1 and 2.

One end of a link mechanism 4 is pivotally connected to the upper end of each slat 3, and the other end is rotatable relative to the slat adjacent above the slat 3 when closed, and slides along the edge of the slat. It is pivoted freely.

Therefore, as shown in the first figure, when closed, a blocking wall is formed continuously in the vertical direction, and when opened, as shown in the second figure, each slat 3 is connected to the horizontal portion of the guide rail 1 in the storage section 2. They are stored suspended and stacked horizontally.

Here, the shutter is opened and closed by meshing and engaging a pair of endless chains 5 that are driven in the vertical direction with racks 3a provided on both sides of the slat 3, as shown in the third figure. It is done by letting.

At this time, the drive shaft 6 for driving the chain 5 has a length that matches the length of the slats 3, which are matched to the width of the opening to be closed late, and each slat 3 is kept horizontal. It is necessary to be able to drive it in the state.

The present invention provides a shutter drive shaft that can satisfy the above requirements with an extremely simple configuration.

An embodiment of the present invention will be described below with reference to the drawings.

In the present invention, as shown in FIG. 3, a spline sleeve 8 is formed at one end of the first shaft element 7, and a spline 9a is formed at one end of the second shaft element 9.

As a result, the first shaft element 7 and the second shaft element 9 are spline-connected to each other so that they can slide in the axial direction, and are extendable and retractable on the same axis, so that the slat 3 to be opened and closed is
It is designed to accommodate the width of

A lock bolt 10 fixes the spline sleeve 8 to the first shaft element 7, and is secured to the first shaft element 7 by spot welding.

These first axis elements 7 and spline sleeves 8
, and the second shaft element 9 constitute an intermediate shaft portion 11.

Further, a sprocket drive shaft 13 is connected to each other end of the first shaft element 7 and the second shaft element 9 via a universal joint 12, and this sprocket drive shaft 13 has a
A pair of drive sprockets 14 are fixed.

An endless chain 5 that engages with racks 3a provided on both sides of the slat 3 and causes the slat 3 to move up and down is wound around each drive sprocket 14 in a meshing manner.

16 is a mounting base on which the bearing 15 is placed.

17 is a sprocket fixed to the end shaft portion 13 of the second shaft element 9, for example, as shown in FIGS. 1 to 3,
A transmission chain 19 is wound around and transmits the rotational force of the motor shaft 18 to the drive sprocket 14 to raise and lower the slat 3.

Since the shutter drive shaft of the present invention has the above-described configuration, the distance between the drive sprockets 14 can be changed and adjusted by changing the depth of the spline connection between the first shaft element 7 and the second shaft element 9. It can easily be made to correspond to the width of 3.

Further, when the slats 3 are not horizontal as shown in FIG. 3, the operation to make them horizontal is performed as follows.

This adjustment can be done using set screw 20 on the right side or set screw 2 on the left side.
This can be done by removing either of the screws 1 and 2, but here we will explain the case where the left set screw 21 is removed.

First, after removing the set screw 21 on the left side, the second shaft element 9 is slid in the direction of arrow A to be free in the hollow part 8a in the spline sleeve 8.

Next, the sprocket 17 is rotated manually, for example, to rotate the drive sprocket 14 and return the slat 3 to the horizontal position.

After spline-connecting the first shaft element 9 to the spline sleeve 8 again, the set screw 21 is tightened to prevent it from moving in the axial direction.

These operations allow the slats 3 to be horizontally adjusted.

Incidentally, when removing the set screw 20 on the right side, the horizontal adjustment of the slat 3 can be performed by a similar operation.

As described above, according to the present invention, with an extremely simple configuration,
To provide a suitable drive shaft for a shutter, which can easily adjust the position of a drive sprocket to an appropriate position for driving a chain, and can hold a shutter slat horizontally to obtain smooth operation. be able to.

[Brief explanation of the drawing]

1 and 2 are explanatory sectional views showing a closed state and a partially closed state of a shutter device to which the shutter drive shaft of the present invention can be applied, and FIG. 3 is an explanatory portion of the shutter drive shaft of the present invention. FIG. 1...Guide rail, 2...Storage section,
3... Slat, 4... Link mechanism,
5------Chain, 6... Drive shaft, 7.
...First axis element, 8...Spline sleeve, 9...Second axis element, 10...Tatsuku bolt, 11...Intermediate shaft Part, 12...
・Universal joint, 13... Sprocket drive shaft, 14... Drive sprocket, 15
...Bearing, 16...Mounting stand, 17...Sprocket, 18...Motor shaft, 19...Transmission chain.

Claims (1)

[Scope of utility model registration request] An intermediate shaft portion consisting of a first shaft element and a second shaft element, each of which has one end connected to the other by a spline so as to be expandable and retractable in the axial direction, and which extends along the same axis; A shutter drive shaft comprising a pair of sprocket drive shafts connected through a joint, and a drive sprocket attached to the sprocket drive shaft and around which a chain for raising and lowering a slat is wound.