JPS6310076Y2 - - Google Patents

Description

[Detailed Description of the Invention] Technical Field This invention relates to a structure for fixing a driving force transmission shaft in a slat angle adjustment mechanism of a blind.

Conventionally, in blinds, a support shaft as a first transmission shaft to which the upper end of a ladder cord is attached is rotatably supported in the head box of the blind, and a drive shaft as a second transmission shaft is attached to the support shaft. By inserting the blind sash into the blind sash and rotating the drive shaft from outside the blind sash, the support shaft is rotated and the angle of the slat supported by the ladder cord is adjusted. The engagement structure between the support shaft and the drive shaft will be explained with reference to FIG. 43 are provided. The drive shaft 44 has a hexagonal cross section so that it can fit into the engagement hole 42 of the support shaft 41.
Reference numeral 45 is a metal sleeve formed to fit onto the support shaft 41, and has a screw hole 46 formed from the outer peripheral surface toward the center, into which a screw 47 can be screwed.

Then, with the sleeve 45 fitted to the support shaft 41, the drive shaft 44 is inserted into the engagement hole 42 of the support shaft 41, and the screw hole 46 of the sleeve 45 and the support shaft 41 are inserted.
Align the screw 47 with the through hole 43 of the drive shaft 44
If the drive shaft 44 is screwed in until it contacts the surface, the drive shaft 44 is fixed to the support shaft 41 so that it cannot move relative to the support shaft 41 in the axial direction.

However, since the above-mentioned work had to be carried out inside the head box, it was very troublesome to insert the screw 47 while aligning the screw hole 46 and the through hole 43.

Purpose This invention was made in order to eliminate the drawbacks of the transmission shaft fixing structure of the conventional slat angle adjustment mechanism as described above, and its purpose is to fix the first transmission shaft and the second transmission shaft. The purpose is to provide a mounting structure that can be easily fixed.

Embodiment An embodiment embodying this invention will be described below with reference to the drawings. 1 is a sliding window composed of blind sashes, and a blind 3 is installed between each sash 2 of double glass. is being hung.
As shown in FIGS. 1 and 2, this blind 3 has a large number of slats 4 supported by two ladder cords 5, and the upper end of the ladder cord 5 is provided in a head box 6 of this blind 3. It is supported by a slat angle adjusting device 7, and its head box 6 is fixed within the upper stile 8 of each sash 2. As shown in FIG. 5, each slat 4 is formed to have a substantially arcuate cross section, and three folds 4a are formed in the longitudinal direction to increase rigidity. 4 is designed to prevent deflection.

The detailed structure of the slat angle adjusting device 7 and the mounting structure for the head box 6 will be explained with reference to FIG. 9 is formed, and an inward step 10 is formed at a position opposite to the same protruding strip 9 on the other side piece. In addition, the slat angle adjustment device 7 of the head box 6
An elliptical through hole 11 is provided at the mounting position, spanning almost the entire width of the bottom.

Reference numeral 12 denotes a support member for supporting a ladder cord support shaft to be described later on the head box 6, and is made of synthetic resin, and the width W at the bottom thereof corresponds to the distance between the protrusion 9 and the step 10 of the head box 6. ,
At its four corners, locking pieces 13 are provided that extend outward and diagonally upward. 14 is a support member 12
The bearing is formed to protrude from the base end of one locking piece 13 toward the other locking piece 13 on one side, and its upper portion is open. and,
An insertion hole 15 is provided between the bearing 14 and the bottom of the support member 12, through which a blind lifting cord 37 (to be described later) can be inserted, and between the bearing 14 and the other locking piece 13, the insertion hole 15 is connected to the insertion hole 15. The slit 16 is secured so that the lifting cord 37 can be guided from above the support member 12 through the slit 16 and into the insertion hole 15.

Reference numeral 17 denotes a bearing that is formed protruding from the base end of one locking piece 13 toward the other locking piece 13 on the other side of the support member 12, and unlike the bearing 14, its upper part is open. Not yet. and,
The insertion hole 15 is provided below and on the side of this bearing 17.
An insertion hole 18 and a slit 19 similar to the slit 16 are provided. Reference numeral 20 denotes an oval-shaped through hole provided at the center of the bottom of the support member 12 over almost the entire width of the support member 12, and an oval-shaped rib 21 protruding downward from the bottom surface is provided at the periphery of the hole.
is formed.

In order to attach the support member 12 constructed in this way to the head box 6, the support member 12 is inserted from above the head box 6 between the protrusion 9 and the step 10 thereof. At this time, since the distance between the outer surfaces of the upper ends of the opposing locking pieces 13 is larger than the distance between the protrusion 9 and the step 10, each locking piece 13 comes into contact with the protrusion 9 or the step 10 and has its own elasticity. It is inserted while bending inward. When the support member 12 is inserted until its bottom surface contacts the bottom side of the head box 6, the support member 12 is inserted as shown in FIG.
The rib 21 on the bottom surface of the head box 6 is fitted into the through hole 11 on the bottom side of the head box 6, and the upper end of the locking piece 13 abuts on the bottom surface of the protrusion 9 and the step 10, respectively, so that the support member 12 is held against the head box 6. It is becoming fixed and immovable.

Reference numeral 22 denotes a support shaft serving as a first transmission shaft for transmitting the driving force for adjusting the angle of the ladder cord 5, and is made of synthetic resin, and has a hexagonal engagement hole 23 in its center. It has been penetrated. 24
25 is a split groove provided at one end of the support shaft 22;
Similarly, these are retaining protrusions provided on the outer periphery of both sides of the split groove 24 at one end of the support shaft 22,
This is designed to prevent the sleeve 31, which will be described later, from coming off. Numerals 26 and 27 are a pair of substantially oval-shaped flanges provided on the circumferential surface of the support shaft 22, and the outer distance between the flanges is equal to the distance between the two bearings 14 and 17 of the support member 12.
, and there is a ladder code 5 between them.
Two prevention pins 28 are supported for binding. These locking pins 28 are attached from the other end of the support shaft 22 through the flange 27, and a guide groove 29 therefor is provided at the other end of the support shaft 22. A notch 30 is formed in the center of each of the locking pins 28, and the upper end of the ladder cord 5 is connected to the claw 30.

Reference numeral 31 denotes a metal sleeve, the inner diameter of which corresponds to the outer diameter of the support shaft 22, and is formed to be able to fit onto the support shaft 22, with a screw hole 32 passing through it from the outer peripheral surface toward the center. The screw 33 can be screwed into it. A drive shaft 34 serves as a second transmission shaft for transmitting a driving force for adjusting the angle of the slat 4, has a hexagonal cross section, and can be inserted into the engagement hole 23 of the support shaft 22. As shown in FIG. 2, when assembled, both ends thereof are rotatably supported by both ends of the head box 6, and an operation dial provided at the center of the vertical stile 35 of the sash 2 shown in FIG. By the operation of 36,
It is designed to be rotationally driven via a transmission mechanism (not shown).

Reference numeral 37 denotes a lifting cord for raising and lowering the slats 4. As shown in FIG. The slats 4 are inserted into the through hole 38 at one end of each slat 4 and suspend and support the bottom box (not shown) at the lowest stage, and the other end is similarly inserted through the through hole 38 at the other end of each slat 4 (not shown). The bottom box is suspended and supported. Inside the head box 6, the lifting cord 37 is inserted through the insertion holes 15 and 18 of the support member 12, and as shown in FIG. If you pull it downward, the slat 4
can be rolled up sequentially from the bottom. In addition, when the blind 3 is installed in the sash 2, the lifting cord 37 hanging from both ends of the head box 6 and its endless edge 37a are hidden behind the vertical stile 35 and cannot be seen from the front of the sash 2. It's getting old.

Next, a procedure for assembling the slat angle adjusting device constructed as described above will be explained.

First, a large number of slats 4 are inserted through the ladder cord 5, and the upper end of the ladder cord 5 is tied to the claw portion 30 of the locking pin 28 attached to the support shaft 22. Then, as shown in FIG. 4, the support member 12 is fitted and fixed into the through hole 11 of the head box 6, and the lifting cord 37 is passed through the insertion holes 15, 18 of the support member 12. Next, the support shaft 22 is inserted into the head box 6 and the through holes 11 and 20 of the support member 12.
and lead it to the upper part of the same head box 6. Then, the end of the support shaft 22 on the flange 27 side is inserted into the bearing 17 from inside the support member 12, and
The end on the flange 26 side is fitted into the bearing 14 from above. The support shaft 22 is now rotatable relative to the support member 12 fixed to the head box 6, and the flanges 26, 27 abut inside the bearings 14, 17, so that the support shaft 22 is supported immovably in the axial direction.

Next, the sleeve 31 is fitted from the end of the support shaft 22 on the flange 26 side. At this time, since the retaining protrusion 25 and the split groove 24 are provided at the same end, when the sleeve 31 is inserted into the protrusion 25 position, the end bends inward, and the protrusion 25
When the sleeve 31 passes the position, the deflection is released and the sleeve 31 is moved between the retaining protrusion 25 and the support member 12.
The support shaft 22 is rotatably supported by the support shaft 22 while being positioned between the bearing 14 and the support shaft 22 .

Next, the drive shaft 34 is opened from one side of the head box 6.
is inserted into the head box 6 and through the engagement hole 23 of the support shaft 22, and both ends of the drive shaft 34 are rotatably supported by the head box 6. Then, with the screw hole 32 of the sleeve 31 and the groove 24 of the support shaft 22 aligned, the screw 33 is
is screwed into the screw hole 32 and the tip of the screw 33 is pressed against the drive shaft 34, the drive shaft 34 is attached to the support member 1.
2 and head box 6. This completes the assembly of the slat angle adjusting device to the head box 6. When the drive shaft 34 is driven to rotate, the support shaft 22 is rotated and the angle of each slat 4 is adjusted by the ladder cord 5.

As described above, in this slat angle adjusting device 7, the split groove 24 is provided at one end of the support shaft 22, and when the sleeve 31 is fitted to the end, the same end bends inward. sleeve 3
1 can be easily fitted onto the support shaft 22.
Further, since a retaining protrusion 25 is provided on the outer periphery of one end of the support shaft 22, if the sleeve 31 is fitted to a position past the protrusion 25, the sleeve 31 will be attached to the protrusion 25 and the support member. It is positioned between the 12 bearings 14 and does not easily come off.

Then, the drive shaft 34 is inserted into the engagement hole 23 of the support shaft 22.
When screwing the screw 33 into the threaded hole 32 of the sleeve 31 after inserting the screw 33 into the threaded hole 32 of the sleeve 31, the split groove 24 is exposed at one end of the support shaft 22. 24 is easy to match. Therefore, by inserting the screw 33 into the screw hole 32 and pressing its tip against the drive shaft 34, it is possible to easily position the drive shaft 34 in the axial direction with respect to the support shaft 22 and, in turn, with respect to the head box 6 within the head box 6. It can be carried out.

Effects As detailed above, this invention
A groove 24 in the axial direction is provided at one end of the first transmission shaft 22, and protrusions 25 for preventing the sleeve 31 from coming off are provided on the outer periphery of both sides of the groove 24. from the first transmission shaft 22
The second transmission shaft 34 is fixed to the first transmission shaft 22 by press-contacting the screw 33 to the second transmission shaft 34 fitted into the first transmission shaft 22. However, since it can be easily fixed, it is an excellent idea as a fixing structure for a driving force transmission shaft in a slat angle adjustment mechanism.

[Brief explanation of the drawing]

Fig. 1 is a front view of a blind sash embodying this invention, Fig. 2 is a partially cutaway front view showing the slat angle adjustment device of the blind, Fig. 3 is an exploded perspective view of the slat angle adjustment device, and Fig. 4 The figure is a sectional view showing the support member fitted into the head box, FIG. 5 is a cross-sectional view of the slat, and FIG. 6 is an exploded perspective view showing a conventional structure for fixing the drive shaft to the support shaft. . Blind 3, ladder cord 5, head box 6, slat angle adjustment device 7, support shaft 22, split groove 24, retaining protrusion 25, sleeve 31, screw 33, drive shaft 34.

Claims (1)

[Scope of utility model registration request] A first transmission shaft 22 that transmits a driving force for adjusting the angle of the slats 4 of the blind 3; a second transmission shaft 34 that is fitted into the first transmission shaft 22 so as to be movable only in the axial direction; In the slat angle adjustment mechanism, an axial split groove 24 is provided at one end of the first transmission shaft 22, and protrusions 25 for preventing the sleeve 31 from coming off are provided on the outer circumferential surface of both sides thereof.
A sleeve 31 is fitted to the same end of the first transmission shaft 22, and a screw 33 is pressed into contact with the second transmission shaft 34 fitted into the first transmission shaft 22 from the outer periphery of the sleeve 31. A fixing structure for a driving force transmitting shaft in a slat angle adjusting mechanism for a blind, characterized in that: is fixed to a first transmitting shaft 22.