JPH059888Y2 - - Google Patents

Description

[Detailed description of the invention] Purpose of the invention (industrial field of application) This invention relates to a device for preventing the drop of dead weight of curtains, blinds, etc.

(Prior Art) Conventionally, for example, the curtain fabric of a pull-up curtain is raised and lowered by operating an operating cord hanging from one side of a head box. When the curtain fabric is not operated, the operating cord is locked by the cord movement regulating member and its movement is prevented, thereby preventing the curtain material from falling due to its own weight.

(Problems to be solved by the invention) In the above-mentioned conventional pull-up curtain dead weight drop prevention device, the cord movement regulating member may be installed on the right or left side of the head box depending on the installation location of the pull-up curtain. In other words, if there is an obstacle to operating the operating cord on the left side of the head box, move the operating cord and code movement restriction member to the right side, and if there is a similar obstacle on the right side of the head box, move the operating cord and code movement restriction member. It was necessary to install the parts on the left side. When installed on the left side and when installed on the right side, the direction is reversed and the direction of the cord locking part of the cord movement restriction member is also reversed. Similar to the left cord movement restriction member where the stop part is located, when installed on the right side, if the cord locking part is in the same direction as the left cord movement restriction member, if you try to prepare the right cord movement restriction member, the cord will not move. There was a problem in that two types of molds were required to mold the regulating member. In addition, if a cord movement restriction member for left and right use is used, which has two cord locking portions so that the cord locking portions are oriented in the specified direction even when installed on the left and right sides, the cord locking portion on the unused side There was a problem that the code could get in the way when moving the operation code.

Structure of the invention (means for solving the problem) In order to solve the above-mentioned problem, this invention raises and lowers the curtain 3 by operating one of a pair of operation cords 7 hanging from the lifting device 6, and also operates the curtain 3. When the cord 7 is not operated, one of the operation cords 7 is locked with the locking member 12 to prevent the curtain 3 from falling due to its own weight.
A fitting protrusion 23 is provided on one of the cases 8, 9 and the locking member 12 of the elevating device 6, and the fitting protrusion 23 is positioned symmetrically with respect to the center line of the pair of operating cords 7, and the fitting protrusion 23 is fitted on the other side. A fitting recess 25 is provided to prevent the weight of the curtain from falling, such as a fold-up curtain.

(Function) With the above means, the self-weight drop prevention device can be used by changing the fitting direction between the locking member 12 and the cases 8 and 9.
Any one of the pair of operation cords 7 is locked.

(Example) Hereinafter, an example in which this invention is embodied in a fold-up curtain will be described with reference to the drawings.

As shown in FIG. 2, the rolled-up curtain 1 has a curtain 3 suspended from a head box 2. Further, four lifting cords 4 are suspended from the head box 2, the lower ends of which are respectively connected to the lower ends of the curtains 3, and the other ends are connected to a rotating shaft 5, which will be described later, arranged inside the head box 2. .

At the left end of the head box 2, an elevating device 6 having a built-in dead weight fall prevention device is attached, and by operating an endless operation cord 7 hanging from the elevating device 6, the curtain 3 can be raised and lowered. Note that both left and right ends of the curtain 3 are wires W stretched between the head box 2 and the floor surface, etc.
It is designed to be raised and lowered while being supported by.

The elevating device 6 will be explained based on FIGS. 1, 3, and 4. The case of the elevating device 6 has a case body 8 and a cover 9 fitted together and fixed with screws 10. A pulley 11 on which the operating cord 7 is hung and a locking member 12 for preventing movement of the operating cord 7 due to the weight of the curtain 3 are installed between the curtain 3 and the cover 9. The operation cord 7 has string portions 7a and ball portions 7b alternately connected.

The case body 8 has mounting protrusions 13 formed vertically on one side thereof, and by inserting the mounting protrusions 13 into one end of the head box 2, the head box 2 can be attached.
is attached to. On the other side of the case body 8, a protrusion 14 is provided at the upper part, and the protrusion 14
An engagement recess 15 is provided in the protrusion 14, and a square hole 16 is formed in the upper surface of the protrusion 14.

The lower surface of the protrusion 14 of the case body 8
A semicircular notch is formed along a through hole 17 formed approximately at the center of the hole. A pulley 11 with which the operating cord 7 engages is arranged in this notch, and a pulley shaft 18 is protruded from the shaft center of one side of the pulley 11, and the pulley shaft 18 is connected to the case through a sliding member 19. It is slidably and rotatably supported in the through hole 17 of the main body 8. Further, a hexagonal rod-shaped rotating shaft 5 rotatably supported within the head box 2 is fitted into a hexagonal hole 20 formed at the axial center of the pulley shaft 18. When the pulley 11 is rotated by operating the operating code 7, the rotating shaft 5 is rotated, and the curtain 3 is raised and lowered based on the rotation of the rotating shaft 5. In addition, the operating cord 7 hung on the pulley 11 is suspended in the left-right direction of the pulley 11 in FIG. 4, that is, in the front-back direction with respect to this fold-up curtain.

The cover 9 has an engagement protrusion 21 formed on the upper side of one side thereof, and a support protrusion 2 on the upper surface of the engagement protrusion 21.
2 is formed. And the engagement protrusion 21
The upper part of the cover 9 is fixed to the case body 8 by fitting the cover into the engagement recess 15 and inserting the support protrusion 22 into the square hole 16.

An engagement shaft 23 as a fitting protrusion is provided protrudingly below the pulley 11 on one side of the cover 9.
This engagement shaft 23 is a square shaft whose lower half is formed into a round shaft shape. The locking member 12 fitted onto the engagement shaft 23 is formed with a locking groove 24 through which only the details of the operation cord 7 can be inserted.
A fitting hole 25 as a fitting recess having the same cross-sectional shape as
is formed, and the engagement shaft 23 can be fitted into the fitting hole 25. As shown in FIGS. 4 and 6, the shapes of the engagement shaft 23 and the fitting hole 25 allow the locking member 12 to be replaced in a line-symmetric manner with respect to the engagement shaft 23, and the operation cord 7 is The detail thereof passes through the locking groove 24 of the locking member 12 and is suspended downward from the pulley 11 .

A screw hole 26 is provided at the center of the engagement shaft 23,
A screw 10 passing through a through hole 27 provided in the lower part of the case body 8 is screwed into the screw hole 26, and the lower part of the case body 8 and the lower part of the cover 9 are fixed by this screw 10.

Next, the operation of the dead weight drop prevention device configured as described above will be explained.

Now, in the lifting device 6 attached to the left side of the head box 2 as described above, a rotational force in the direction of arrow A acts on the pulley 11 due to the weight of the curtain 3 as shown in FIG. Since the ball portions 7b abut on both sides of the locking groove 24 of the locking member 12, rotation of the pulley 11 in the same direction is prevented, and the curtain 3 is suspended and supported at an arbitrary position.

To pull up the curtain 3 from this state, as shown in Figure 5, pull the operation cord 7 hanging forward from the pulley 11 (to the left in the figure) as shown by the solid line in the figure. If the operating cord 7 is pulled downward in this state, the pulley 11 is rotated in the direction of arrow B, and the curtain 3 is pulled up. or,
When lowering the curtain 3, use its own weight to move the pulley 11 from the state shown by the solid line in FIG.
All you have to do is rotate it in the direction and pull in the operating cord 7.

When you let go of the operating cord 7 after raising and lowering the curtain 3 to the desired position, the operating cord 7 tries to return to the state shown by the chain line in FIG. 5 due to its own weight, and in this state, the ball portion 7 of the operating cord 7 again
b comes into contact with both sides of the locking groove 24, thereby preventing further movement of the operating cord 7, and as a result, rotation of the pulley 11 is prevented and the curtain 3 is suspended and supported at a desired height.

Now, when this elevating device 6 is installed on the right side of the head box 2, the pulley 1 in FIG.
The operation cord 7 hanging from the curtain 1 to the right side is located in front, and the pulley 11 tries to rotate in the direction of the arrow B due to the weight of the curtain 3. In this case, if the locking member 12 is replaced as shown in FIG. 6, the curtain 3 can be raised or lowered by operating the front operation cord 7 in the same way as in the case on the left side described above.

Therefore, this elevating device 6 is similar to that shown in FIG. 5 or 6.
As shown in the figure, by fitting the locking member 12 to the engagement shaft 23, the curtain 3 can be raised and lowered by being attached to either the left or right side of the head box 2, and the curtain 3 can be prevented from falling under its own weight. can do. The locking member 12 is connected to the pulley 11
Since it acts only on the operating cord 7 hanging forward from the pulley 11 and does not pose any obstacle to the movement of the operating cord 7 hanging backward from the pulley 11,
The operation code 7 can be operated extremely smoothly.

Note that this invention is not limited to the above embodiment, and in this embodiment, a fitting hole 25 is provided in the locking member 12.
Although the cover 9 is provided with the engaging shaft 23 protrudingly provided, the cover 9 may be provided with a fitting hole and the locking member 12 may be provided with a protrusion that fits into the fitting hole.

Further, this invention may be applied to various types of weight fall prevention devices such as blinds in addition to the device for preventing fall of dead weight of a rolled-up curtain.

Effects of the invention As detailed above, the self-weight drop prevention device of this invention can be used on either the left or right side of the head box 2 by simply changing the direction of the locking member 12 and fitting it to the cases 8 and 9. At the same time, the operation cord 7 can be operated smoothly, which is an excellent effect.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view of a self-weight drop prevention device showing an embodiment of this invention in a pull-up curtain, Fig. 2 is a schematic diagram showing the entire pull-up curtain, and Fig. 3 is a lifting device. FIG. 4 is a longitudinal sectional view taken along the - line in FIG. 3, FIG. 5 is a longitudinal sectional view for explaining the action of the self-weight drop prevention device, and FIG. 6 is a case in which the locking member is installed in the opposite direction. FIG. Pull-up curtain 1, head box 2, curtain 3, lifting device 6, operation cord 7, case body 8, cover 9, locking member 12, engagement shaft (fitting protrusion) 23, fitting hole (fitting recess) 25 .

Claims (1)

[Claims for Utility Model Registration] A pair of operating cords 7 hanging from the lifting device 6
In a pull-up curtain or the like, the curtain 3 is raised or lowered by operating one side of the curtain 3, and when the operation cord 7 is not operated, one side of the operation cord 7 is locked with a locking member 12 to prevent the curtain 3 from falling due to its own weight. A fitting protrusion 23 is provided on one of the cases 8 and 9 of the lifting device 6 and the locking member 12, and the fitting protrusion 23 is positioned symmetrically with respect to the center line of the pair of operating cords 7.
A fitting recess 25 that fits into the fitting protrusion 23 on the other side.
A device for preventing the fall of dead weight of a rolled-up curtain, etc., characterized by having the following features: