JPH0354553Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Field of Application) This invention relates to a mounting structure for attaching to a head box a dead weight fall prevention device that prevents the slats of a blind from falling due to their own weight.

(Prior art) Conventionally, as a type of blind, a lifting cord hanging down from one side of a headbox is pulled out to pull up a slat, and the lifting cord is pulled into the headbox using the weight of the slats and bottom rail. There are some that lower the slats by lowering the slats. In such blinds, in order to prevent the slats from lowering due to their own weight when the lifting cord is not operated, a dead weight drop prevention device is installed to prevent the lifting cord from being drawn into the headbox when the lifting cord is not operated. Provided at the cord hanging position.

Such a dead weight drop prevention device has a fixed roller and a movable roller supported within a case in order to pinch the lifting cord and prevent it from being drawn into the head box. The case supported the movable rollers within the case and was fixed to the head box using cord pins that distributed the plurality of lifting cords hanging from the case.

(Problem to be solved by the invention) In the dead weight drop prevention device as described above, when it is installed in the headbox, the case is attached to a predetermined position of the headbox and the movable roller is positioned inside the case. Therefore, it was necessary to insert a string pin into the case, fix the case to the head box with one string pin, and simultaneously support the movable roller within the case. Therefore, there is a problem in that the above-mentioned installation work is extremely complicated.

Structure of the invention (Means for solving the problems) In order to solve the above problems, this invention has a main body 10 attached to the mounting hole 9 provided in the head box 2, and a fixed roller 17 inside the main body 10. and a movable roller 19, and a lifting cord 7 for raising and lowering the slat 4 hangs below the headbox 2 from inside the headbox 2 through between the fixed roller 17 and the movable roller 19, and the lifting cord 7 When the slat 4 is not operated, the lifting cord 7 is sandwiched between the fixed roller 17 and the movable roller 19 to prevent the lifting cord 7 from being drawn into the head box 2 due to the weight of the slat 4, thereby preventing the weight of the slat 4 from falling. In the device for preventing slat dead weight drop, the main body 10 is composed of an outer piece 11 and an insertion part 12, the outer piece 11 is shaped so that it cannot be inserted into the mounting hole 9 from outside the head box 2, and the insertion part 12 has a shape that can be inserted into the mounting hole 9 from outside the head box 2, and the fixed roller 17 and the movable roller 19 are attached to the insertion portion 12.
A support piece 13 is provided on one side of the insertion portion 12 to abut on the inner surface of the head box 2, and a fitting hole 14 is provided on the other side of the insertion portion 12, and the fitting hole 14 is provided with a support piece 13 that contacts the inner surface of the head box 2. 2, by fitting the fixing pin 15 that comes into contact with the inner surface of the outer piece 11.
The main body 10 is attached to the head box 2 using the support piece 13 and the fixing pin 15.

(Function) By the above means, the insertion part 12 is inserted into the head box 2 through the mounting hole 9, and the fixing pin 15 is inserted into the fitting hole 14 in the head box 2 with the support piece 13 in contact with the inner surface of the head box 2. When fitted, the self-weight drop prevention device 8 is supported by the head box 2.

(Embodiment) An embodiment embodying this invention will be described below with reference to the drawings. As shown in FIG. A slat 4 is suspended and supported, and a bottom rail 5 is suspended from the lower end of the ladder cord 3. The upper end of the ladder cord 3 is suspended from an angle adjustment shaft (not shown) within the head box 2, and by rotating an operating rod 6 hanging from one side of the head box 2, each The angle of the slats 4 can be adjusted in the same phase.

A lifting cord 7 passes through each slat 4 near the supporting portion of the ladder cord 3, and one end of the lifting cord 7 is connected to the bottom rail 5, and the other end is led to one side inside the head box 2, and then It is suspended from a dead weight drop prevention device 8 near the operating rod 6 at one end of the head box 2. Each slat 4 can be raised or lowered by operating the lift cord 7 to raise or lower the bottom rail 5.

The lower end of the lifting cord 7 hanging from the self-weight drop prevention device 8 is connected to the lower end of the operating rod 6.
When the bottom rail 5 is lowered to its lowest limit, the operating rod 6 is suspended to a position near the lower end, as shown in FIG.

Next, the structure of the dead weight fall prevention device 8 will be explained according to FIGS. 1 to 6. As shown in FIG. A mounting hole 9 for mounting is formed. Its mounting hole 9
The self-weight drop prevention device 8 attached to the main body 10 is molded from synthetic resin as shown in FIGS. 1 and 2.
An outer piece 11 is formed at the lower part of the outer piece 11 .
An insertion portion 12 is integrally formed above the. The insertion portion 12 is formed with a size that allows it to be inserted into the mounting hole 9 from below the head box 2, and the outer piece 11 is formed with a size that cannot be inserted into the mounting hole 9. When inserted inside, it comes into contact with the outer surface of the head box 2 around the mounting hole 9, as shown in FIG.

A pair of support pieces 13 are protruded from one side of the insertion portion 12 at positions separated from the outer piece 11 by the wall thickness of the head box 2, and as shown in FIGS. When the insertion portion 12 is inserted into the head box 2 with the head box 2 inserted between the piece 13 and the outer piece 11, one side of the main body 10 is supported by the head box 2.

A pair of fitting holes 14 as fitting portions are formed on both the front and rear sides of the other side of the insertion portion 12, and the fitting holes 14
The tip of a U-shaped fixing pin 15 is fitted into the hole. When the insertion portion 12 is inserted into the head box 2, the base end of the fixing pin 15 comes into contact with the inner surface of the head box 2, as shown in FIG. 4, and the other side of the main body 10 is supported by the head box 2. There is.

The main body 10 has a roller accommodating section 16 which is vertically penetrated through the center thereof, and a fixed roller 17 is rotatably supported on one side of the upper part of the roller accommodating section 16. The other side of the roller accommodating portion 16 is a guide slope 1 having an uneven surface with a sawtooth cross section on the downward slope.
8 is formed. A movable roller 19 is disposed between the guide slope 18 and the fixed roller 17, and the movable roller 19 is supported by a string pin 20 whose both ends are supported by the main body 10 at the lower part of the roller accommodating portion 16. This prevents the roller accommodating portion 16 from falling downward. In addition, the movable roller 1
9 is made of a stainless steel sintered alloy with excellent wear resistance, improving durability.

3 guided inside the head box 2 to one side of the dead weight drop prevention device 8 constructed in this way.
The book lifting cord 7 is suspended below the head box 2 from between the fixed roller 17 and the movable roller 19, and when the lifting cord 7 is drawn into the head box 2 by the weight of the slats 4 and bottom rail 5, it is moved. Movable roller 19
moves upward along the guide slope 18, and as shown in FIG.
The bottom rail 5 is sandwiched between the top and bottom rails to prevent further movement, and the bottom rail 5 is suspended and supported at an arbitrary position.

Furthermore, if the lifting cord 7 is pulled slightly downward from the state in which the lifting cord 7 is sandwiched between the rollers 17 and 19 as shown in FIG. 2, the movable roller 19 will be moved downward along the guide slope 18. From this state, if you pull the lifting cord 7 further downward, you can pull up the bottom rail 5 to the desired position, and if you pull the lifting cord 7 in the direction of the arrow in the figure, the lifting cord 7 will be drawn into the head box 2 and the bottom rail will be lifted up. 5
can be lowered to any desired position.

Now, to explain the installation procedure of the self-weight drop prevention device 8 configured in this way to the head box 2, the fixed roller 17 is installed in the roller accommodating portion 16 of the main body 10 in advance, and the movable roller 19 is attached using the string pin 20. is supported within the roller housing section 16. One side of the insertion portion 12 of the main body 10,
That is, the support piece 13 side is inserted into the head box 2 through the mounting hole 9, and the support piece 1 is inserted as shown in FIG.
When the head box 2 is inserted between the main body 3 and the outer piece 11, one side of the main body 10 is supported by the head box 2, as shown in FIG.

From this state, insert the other side of the insertion part 12 into the head box 2, bring the outer piece 11 into contact with the outer surface of the head box 2, and fit the fixing pin 15 into the fitting hole 14 to fix it as shown in FIG. The base end of the pin 15 comes into contact with the inner surface of the head box 2, and the main body 10
The other side is supported by head box 2.

Therefore, this self-weight drop prevention device 8 is installed in advance in the roller accommodating portion 1 of the main body 10 outside the head box 2.
6, the movable roller 19 can be loaded with a string pin 20 so as not to fall off, and the insertion portion 1
While the support piece 13 on one side of the head box 2 is engaged with the inner surface of the head box 2, the fitting hole 14 on the other side of the insertion portion 12 is inserted.
By fitting the fixing pin 15 into the head box 2, it can be easily attached to the head box 2. Since the fitting hole 14 is formed only on the other side of the insertion portion 12, the fitting hole 14 does not interfere with the bearing portion of the fixed roller 17, and in order to avoid this interference, the main body 10 is made larger. mating hole 1
There is no need to secure space for 4.

In the above embodiment, the fixing pin 15 is U-shaped, but it is also possible to make the fixing pin 15 rod-shaped and fit into the insertion part 12 at the corner of the head box 2 as shown by the chain line in FIG. good.

Effects of the Invention As detailed above, in this invention, after disposing the movable roller 19 in the self-weight drop prevention device 8 in advance, the device 8 is moved to the support piece 1 on one side of the insertion portion 12.
3 and the fixing pin 15 fitted into the fitting hole 14 on the other side, the head box 2 can be attached to the head box 2, making the work easy. By providing the device 8 only in the area, it is possible to prevent the device 8 from increasing in size.

[Brief explanation of the drawing]

Fig. 1 is a front view of a self-weight drop prevention device embodying this invention, Fig. 2 is a longitudinal sectional view, Fig. 3 is a side view, Fig. 4 is a sectional view taken along the line A-A in Fig. 1, FIG. 5 is a cross-sectional view taken along the line B--B in FIG. 1, FIG. 6 is a perspective view showing the attachment portion of the dead weight fall prevention device of the headbox, and FIG. 7 is a front view of the blind related to this invention. Head box 2, slat 4, lifting cord 7, dead weight drop prevention device 8, mounting hole 9, main body 10,
External piece 11, insertion part 12, support piece 13, fitting hole 1
4, fixed pin 15, fixed roller 17, movable roller 19.

Claims (1)

[Claims for Utility Model Registration] The main body 10 is attached to the mounting hole 9 provided in the head box 2, and the fixed roller 17 is mounted inside the main body 10.
and a movable roller 19, and the lifting cord 7 for lifting and lowering the slat 4 is connected to the head box 2.
It hangs below the head box 2 from inside through between the fixed roller 17 and the movable roller 19, and when the elevating cord 7 is not operated, the elevating cord 7 is sandwiched between the fixed roller 17 and the movable roller 19 and slatted. In the slat dead weight drop prevention device which prevents the dead weight of the slat 4 from falling by preventing the lifting cord 7 from being drawn into the head box 2 due to the weight of the slat 4, the main body 10 is composed of an outer piece 11 and an insertion part 12. , the outer piece 11 is attached to the head box 2
The insertion part 12 has a shape that cannot be inserted into the mounting hole 9 from outside the head box 2, and the fixed roller 17 and the movable roller 19 are inserted into the insertion part 12. support,
The head box 2 is disposed on one side of the insertion section 12.
A support piece 13 is provided that comes into contact with the inner surface of the insertion portion 1.
A fitting hole 14 is provided on the other side of the head box 2, and a fixing pin 15 that comes into contact with the inner surface of the head box 2 is fitted into the fitting hole 14 to connect the outer piece 11 and the support piece 1.
3 and a fixing pin 15 to attach a main body 10 to a head box 2.