JPH0543195Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention is directed to a winding device for a shutter, particularly a winding device for a lightweight shutter that is operated for winding by the biasing torque stored in a winding spring. This invention relates to an axial steadying structure for a hoisting wheel in a device.

[Prior Art] First, a conventional apparatus will be explained with reference to FIGS. 8 to 11.

Conventionally, in the general structure of this type of manual opening/closing lightweight shutter, the hoisting wheels 6, 6 loosely fitted on the immovable hoisting shaft 3 are engaged with the hoisting shaft 3 via the hoisting springs 7, 7. A structure is adopted in which the curtain can be easily rolled up against the weight load of a slat curtain (not shown) based on the biasing force of the stored torque of the hoisting springs 7, 7.

By the way, in the case of such a structure, since the winding springs 7, 7 are twisted helical elastic bodies and utilize the restoring force, when the curtain is rolled up or rolled down, There was a problem in that the hoisting springs 7, 7 were wound up or unwound and pushed by the hoisting springs 7, 7, causing the hoisting wheels 6, 6 to slide in the axial direction.

However, in view of these problems, conventionally,
As shown in FIG. 8, on the outside of the bushes 8, 8 which are fitted onto the hoisting shaft 3 and fixed to the hoisting wheels 6, 6, the bushes 8, 8 which are fitted onto the hoisting shaft 3 and fixed to the hoisting wheels 6, Washers 19, 19 shown in FIG. 10 are arranged so as to come into contact with the
The cotter pins 20, 20 shown in FIG.
A structure was adopted in which the hoisting wheels 6, 6 were prevented from sliding in the axial direction via the bushes 8, 8 by preventing the hoisting wheels 19 from sliding to the left or right. As another example, as shown in FIG. 9, an outer ring 14 riveted 17 to the hoisting wheel 6 and an inner ring 15 externally fitted and press-welded to the hoisting shaft 3 can form a ball 12.
In the case of the hoisting wheel 6 that holds the outer ring 14
In the same way as above, the washer 19 is placed in contact with the outer surface of the
A structure is adopted in which sliding of the hoisting wheel 6 in the axial direction is prevented by further assembling a cotter pin 20 on the outside thereof and abutting and engaging the outer ring 14 and the washer 19. Ta.

[Problems to be solved by the invention] However, in the case of the axial steadying structure for the hoisting wheel that uses the washer and cotter pin, the number of parts is two, and the thrust load from the hoisting wheel affects the washer. Since the force is concentrated on the upper and lower ends of the cotter pin, there is a problem that the cotter pin is easily worn out or damaged.

This invention was created in view of the above problems.
The object is to provide an axial steadying structure for a hoisting wheel that requires only one component and has a robust structure in which the components are less likely to wear or break.

[Means for Solving the Problems] The structure of the present invention for achieving the above problems will be explained with reference to FIGS. 1 to 7, which correspond to embodiments.

That is, the shutter winding device according to the present invention has an immovable winding shaft 3 fixed in a fixed position.
By engaging the hoisting wheel 6 with the bushing 8 fixed at the center and loosely inserted into the hoisting shaft 3 via the hoisting spring 7, the stored torque of the hoisting spring 7 is reduced. A winding device for a shutter that operates to wind up a slat curtain based on bias includes a collar 5 which is elastic in the inner and outer directions and is formed facing each other in a substantially semicircular direction from a central portion. A substantially Y-shaped retaining ring 1 having a projecting piece 4 formed to project diametrically at a central portion is attached to the hoisting shaft 3 at a position where it abuts at least one side of the bush 8 of the hoisting wheel. The projecting piece 4 is inserted and attached to the insertion hole 9 bored in the vertical direction, and the opposing inner surfaces at both ends of the collar 5 are pressed against the outer circumferential surface of the hoisting shaft 3 and fixed. There is.

[Function] According to the present invention, the collar 5 of the retaining ring 1 comes into contact with the thrust load in the axial direction of the bush 8 at the center of the hoisting wheel 6 based on the expansion and contraction of the hoisting spring 7 when the shutter is opened and closed. The hoisting wheel 6 is engaged with the hoisting wheel 6 to prevent the hoisting wheel 6 from sliding in the axial direction.
hold in the correct position.

Moreover, since the axial steadying structure of the hoisting wheel 6 uses only one retaining ring 1 on one side, the number of components is small and manufacturing is easy. Shaft 3
The retaining ring 1 is fitted onto the hoisting shaft 3 so as to expand the opening of the flange 5 against elasticity while inserting the protrusion 4 into the insertion hole 9 which is vertically bored on the diameter of the hoisting shaft 3. It is easy to install and remove. Further, in the attached state, since the opposing inner surfaces of both ends of the collar 5 are pressed against the outer circumferential surface of the hoisting shaft 3, there is no accident such as the retaining ring 1 coming off during use.

[Example] Hereinafter, the present invention will be explained in detail with reference to an example shown in FIGS. 1 to 7. Note that FIGS. 3 and 4 show the first embodiment, and FIGS. 5 to 7 show the second embodiment.

As shown in FIGS. 1 and 2, a plate-shaped retaining ring 1 has two teeth 2, 2 facing each other on its inner peripheral surface.
A protruding piece 4 that projects diametrically longer than the diameter of the hoisting shaft 3 is formed at the center of the two teeth 2, 2, and a flange 5 that is eccentric to a small diameter in the radial direction. . That is, the retaining ring 1 is an eccentric Y-shaped retaining ring.

The winding device of the manual open/close type lightweight shutter is composed of a shaft 3, a winding wheel 6, a winding spring 7, and a bush 8, as shown in FIGS. 3 and 4. Since the functions and functions are the same as those of the conventional technology shown in FIGS. 8 to 11, the same reference numerals are given and the description thereof will be omitted.

In the shutter winding device configured as described above, the outer surface of the bush 8 faces outward and is centered at a position slightly larger than approximately 1/2 the plate thickness of the retaining ring 1. The protruding piece 4 is inserted into an insertion hole 9 that has a diameter slightly larger than the width of the protruding piece 4 of the retaining ring 1 and is bored on the diameter of the hoisting shaft 3, and tooth 2,
The retaining ring 1 is arranged to face and hold the hoisting shaft 3 at 2.

In the figure, reference numeral 10 is an auxiliary pipe, and 11 is an adjustment hole drilled on the hoisting shaft 3 used when adjusting the hoisting spring 7.

Next, a second embodiment will be explained with reference to FIGS. 5 to 7.

In these figures, 12 is a ball, and the ball 12 is held by an outer ring 14 whose outer periphery is sealed by a cover 13 and an inner ring 15 which is press-fitted into the hoisting shaft 3, forming a bearing structure. are doing. Further, the cover 13 is press-fitted into a case 16 that is fixed to the hoisting wheel 6 with rivets 17 and bolts 18. On the other hand, the inner ring 15
The hoisting shaft 3 is located on the inside (right side in Figure 5).
A short tubular bush 8 is provided which is loosely fitted into the inner ring 15 and slidably abuts against the side surface of the inner ring 15.

Then, inward from the inner surface of the bush 8, that is, at a substantially intermediate position inside the hoisting spring 7, an insertion hole is bored on the diameter of the hoisting shaft 3 as in the first embodiment. The protruding piece 4 is inserted into the hole 9, and the retaining ring 1, which holds the hoisting shaft 3 with the two teeth 2, facing each other, is disposed.

In the second embodiment described above, the adjustment hole 11 is also formed in the case 16 coaxially with the adjustment hole 11 formed in the hoisting shaft 3. The same reference numerals as those in the embodiment indicate the same functions.

Next, the assembly and operation of the embodiment of the present invention constructed as above will be explained.

In the first embodiment, after assembling the hoisting wheel 6 etc. to the immovable hoisting shaft 3 and adjusting the hoisting spring 7, a retaining ring is inserted into the insertion hole 9 bored in the hoisting shaft 3. The retaining ring 1 may be press-fitted onto the hoisting shaft 3 from the radial direction so as to expand the opening of the collar 5 against elasticity while inserting the protruding piece 4 of the retaining ring 1 into the hoisting shaft 3.

Then, the inner side surface of the protruding piece 4 and the collar 5 of the retaining ring 1 assembled as described above (the right side surface in FIG. 3)
is in contact with the bush 8, and the bush 8 is configured to be slidable in the direction of rotation, so that the hoist wheel 6 is moved by the thrust load in the axial direction during the hoisting operation of the hoisting spring 7. Even if it is pressed outward, the retaining ring 1 prevents the hoisting wheel 6 from sliding outward.

In the second embodiment as well, if the retaining ring 1 is disposed in the same way as above, the hoisting wheel 6 can be moved inward (the fifth
Even if the hoisting wheel 6 is pressed toward the right side in the figure, the retaining ring 1 prevents the hoisting wheel 6 from sliding inward.

In addition, in both the first and second embodiments described above, the retaining ring may be disposed at two locations on the left and right, or at one location on either the left and right, depending on the sliding characteristics of the winding device of the shutter. It is possible.

[Effects of the invention] As described in detail above, according to the axial steadying structure for the hoisting wheel of a shutter according to the present invention, the protrusion 4 at the center of the approximately Y-shaped retaining ring 1 is The shaft 3 is inserted into the insertion hole 9 formed in the vertical direction, and the retaining ring 1 is inserted into the insertion hole 9, and the semicircular collar 5 of the retaining ring 1 is brought into contact with the bushing 8 at the center of the hoisting wheel 6 to be hoisted. Since the wheel 6 is prevented from sliding in the axial direction, only 11 retaining rings are required to prevent the sliding, and the number of parts is small. Since it comes into contact with the semicircular surface of the semicircular collar 5 along the outer periphery of the hoisting shaft 3, the contact load is distributed in the semicircular direction, making it less likely to wear or break and is structurally robust. and is highly reliable.

In addition, since the above-mentioned retaining ring 1 is attached and fixed by the opposing inner surfaces of both ends of the semicircular collar 5 being pressed against the outer peripheral surface of the hoisting shaft 3, the protruding piece 4 at the center of the retaining ring 1 must be removed after the installation work. There is no need to bend it, the installation work is easy with one touch, and the installation state is stabilized by pressure, and there is no accident such as the retaining ring 1 coming off during use, which is an excellent practical effect.

[Brief explanation of the drawing]

Figure 1 is a front view of an eccentric Y-shaped retaining ring used in a shutter winding device according to the present invention;
The figure is a side view of the same as above, FIG. 3 is a sectional view taken along the line in FIG. 5 is a sectional view taken along the line in FIG. 7 showing the second embodiment of the above, FIG. The figure is a front view showing an example of a conventional structure, and FIG.
FIG. 10 is a sectional view showing another example of the conventional structure, FIG. 10 is a front view showing a washer used in the conventional structure, and FIG. 11 is a front view showing the split pin. 1... Retaining ring, 2... Teeth, 3... Hoisting shaft, 4... Protruding piece, 5... Tsuba, 6... Hoisting wheel, 7... Hoisting spring, 8... Button, 9
...Insertion hole, 12...Ball, 13...Cover,
14...outer ring, 15...inner ring, 16...case.

Claims (1)

[Claims for Utility Model Registration] An immovable hoisting shaft 3 fixed in a fixed position,
By engaging the hoisting wheel 6 with a bush 8 fixed to the center and loosely inserted into the hoisting shaft 3 via the hoisting spring 7, the stored torque of the hoisting spring 7 is energized. In a shutter winding device for winding a slat curtain based on the above, a flange 5 having elasticity in the inner and outer directions formed facing each other in a substantially semicircular direction from a central portion and a central portion of the flange 5 are provided. A substantially Y-shaped retaining ring 1 having a protruding piece 4 formed to protrude diametrically is attached to the hoisting shaft 3 in the vertical direction at a position where it abuts at least one side of the bush 8 of the hoisting wheel. A shutter characterized in that the projecting piece 4 is inserted and attached to an insertion hole 9 bored in the shaft, and the opposing inner surfaces of both ends of the collar 5 are pressed against the outer circumferential surface of the hoisting shaft 3 and fixed. winding device.