JPH0335037Y2 - - Google Patents

Description

[Detailed description of the invention] Purpose of the invention (industrial application field) This invention relates to a dead weight drop prevention device for preventing the slats of a blind from falling due to their own weight and suspending and supporting the slats at a desired position. It is.

(Prior Art) The slats of a blind are usually raised and lowered by operating a lifting cord hanging from one side of a headbox. The lifting cord is prevented from moving when not operated by a stopper provided in the head box, thereby preventing each slat from descending due to its own weight.

(Problem to be solved by the invention) In the conventional blind as described above, each member constituting the stopper is installed perpendicularly to the longitudinal direction of the head box, which prevents the lifting cord from moving. In order to release the stopper, it was necessary to pull the lifting cord along the slat in a diagonal lateral direction, that is, toward the wall surface, and tilt it at a predetermined angle or more with respect to the headbox. Therefore, when the blind is installed all over the wall of the room, there is a problem in that the wall on the side of the blind gets in the way and makes it difficult to release the stopper.

Structure of the invention (Means for solving the problem) This invention solves the above problem by pulling the lifting cord hanging down from one side of the head box downward to pull up the slats and lift the slats and bottom rail. The slat is lowered by drawing the lifting cord into the headbox using the weight of the lifting cord, and the lifting cord is sandwiched between the movable member that moves as the lifting cord moves and the clamping means fixed inside the headbox. In a blind that prevents the slats from falling due to their own weight by preventing the elevating cord from being pulled into the head box when the elevating cord is not operated, the slats are pulled up by pulling the elevating cord hanging down from one side of the head box. , the slat is lowered by drawing the lifting cord into the headbox using the weight of the slat and bottom rail, and the movable member that moves as the lifting cord moves and the clamping means fixed inside the headbox. In this blind, which prevents the lifting cord from being drawn into the headbox when it is not operated by holding the lifting cord between the slats and prevents the slats from lowering under their own weight, blinds are installed on both sides of the opening in the side wall on the indoor side of the headbox. a clamping means provided between the pair of side plates so as to be rotatable along the longitudinal direction of the head box; a rack provided between the both side plates and formed on a slope that descends toward the opening side of the head box; Similarly to the above, a movable member is disposed along the longitudinal direction of the headbox so as to move obliquely toward the outside of the room of the headbox along the rack between both side plates, and as the movable member moves toward the outside of the room, The lifting cord is sandwiched between the movable member meshing with the rack and the clamping means.

(Function) With the above means, the movable member is moved in the front and back direction of the blind 1, that is, in the direction of the inside and outside of the room as the lifting cord 7 moves, and when the lifting cord 7 is pulled straight toward the front of the blind, that is, toward the inside of the room, the movable member is easily moved. 11
The lifting cord 7 is clamped between the movable member 12 and the clamping member 15 which are engaged with each other, and this clamping is separated.

(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 and supported from the lowest stage of the ladder cord 3. The upper end of the ladder cord 3 is supported by an angle adjustment shaft (not shown) inside the head box 2, and the angle adjustment shaft can be rotated by operating two angle adjustment strings 6 hanging from the side of the head box 2. ,
The angle of each slat 4 can be adjusted in the same phase via the ladder cord 3.

A lifting cord 7 passes through each slat 4 near the supporting portion of the ladder cord 3, and the lower end of the lifting cord 7 is connected to the bottom rail 5, and the upper end is guided to one side inside the head box 2, and then the lower end is connected to the bottom rail 5. It is suspended near the angle adjustment string 6 at the end of the head box 2. By operating the lifting cord 7 to raise and lower the bottom rail 5, each slat 4 can be raised and lowered, and the moment the lifting cord 7 is released, the dead weight drop prevention device, which will be described later, is activated within the head box 2. The slat 4 is suspended and supported at a desired position.

A slat dead weight drop prevention device 8 for preventing the movement of the lifting cord 7 when the lifting cord 7 is not operated.
As shown in FIGS. 1 to 3, the opening 9 is provided in the side wall on the indoor side in order to allow the lifting cord 7 to hang down at the end of the head box 2, and its detailed structure will be explained below. Then, opening 9
A pair of side plates 10 are vertically fixed on both sides, and a rack 11 is formed between the side plates 10 along the longitudinal direction of the head box 2 on a slope that descends toward the opening 9. A gear 12 serves as a movable member that meshes with the rack 11 at the head box 2.
Along the longitudinal direction, the support shafts 13 at both ends are guided by oblique guide grooves 14 provided in the side plate 10, supported in the front-rear direction of the blind 1, and engaged with the racks 11. It is designed to move up and down on a slope while rotating. When the gear 12 is lowered to the lowest position in the guide groove 14, it is disengaged from the rack 11 and can rotate freely, as shown in FIG.

Above the top of the rack 11, a guide roller 15 serving as a clamping means is rotatably supported between the side plates 10 along the longitudinal direction of the head box 2 as described above, and behind the rack 11 is a guide shaft 16 for the lifting cord 7. Two of them are fixed upright. The lifting cord 7 guided in the direction of the dead weight drop prevention device 8 inside the head box 2 is guided in the direction of the rack 11 by the guide shaft 16, passes between the guide roller 15 and the gear 12, and is suspended below the head box 2. There is. Therefore, the lifting cord 7 is always frictionally engaged with the gear 12 due to its own weight.

Next, the operation of the dead weight drop prevention device 8 configured as described above will be explained.

In the description of the above embodiment, the gear 12 moves along the guide groove 14, but the guide groove 14 is not essential, and the gear 12 moves along the rack 11 in a predetermined manner. If so, its configuration does not matter.

Now, when the lifting cord 7 hanging from the head box 2 is pulled downward to raise the slat 4, the gear 12 moves downward while rotating on the rat 11 as the lifting cord 7 moves. As shown in FIG. 2, the lower end of the guide groove 14 is reached and the guide groove 14 becomes freely rotatable. In this state, the lifting cord 7 can be easily pulled out by being guided by the guide shaft 16, guide roller 15, and gear 12, and the slat 4 can be pulled up by pulling the lifting cord 7 downward.

After pulling up the slats 4 to the desired position, when you let go of the lifting cord 7, the lifting cord 7 hanging from the self-weight drop prevention device 8 tries to be pulled into the head box 2 by the weight of each slat 4 and the bottom rail. , at this time lift code 7
The gear 12 engaged with the gear 12 is moved upward while rotating on the rack 11 by the movement of the lifting cord 7.
Eventually, as shown in FIG. 2, the lifting cord 7 will be sandwiched between the guide roller 15 and the guide roller 15. In this state, the force that pulls the lifting cord 7 into the head box 2 simultaneously acts as a force that pinches the lifting cord 7 between the guide roller 15 and the gear 12, so the lifting cord 7 is firmly supported so that it cannot move. Ru. Therefore, when the elevating cord 7 is released, the movement of the elevating cord 7 is stopped almost immediately, so that each slat 4 is suspended and supported at a desired position without falling due to its own weight.

On the other hand, in order to further lower the slat 4 which is suspended and supported at a desired position by the self-weight drop prevention device 8, the lifting cord 7 is pulled slightly downward from the state shown in FIG. 2, and the gear 12 is moved downward. After that, as shown by the chain line in FIG. 3, if the lifting cord 7 is lifted straight slightly upward toward the front side of the blind 1, that is, toward the interior of the room, the lifting cord 7 and the gear 12 will be separated. In this state, each slat 4 can be lowered by drawing the lifting cord 7 into the head box 2 using the weight of the slats 4 and bottom rail 5. After lowering the slat 4 to the desired position, let go of the lifting cord 7 with it hanging directly below the head box 2.
As described above, since the lifting cord 7 is instantly caught between the guide roller 15 and the gear 12, each slat 4 is suspended and supported at a desired position.

As described above, this self-weight drop prevention device 8
2 and the guide roller 15, and when the lifting cord 7 is pulled downward, the gear 12 is automatically moved downward and the lifting cord 7 is pulled downward.
When the lifting cord 7 is released, the lifting cord 7 is clamped and fixed between the gear 12 and the guide roller 15, and its movement is prevented. On the other hand, if the lower end of the lifting cord 7, whose movement is blocked, is pulled toward the front of the blind 1, the gear 12 is lowered, and in this state, the slat 4
By the weight of the bottom rail 5, the lifting cord 7 can be pulled into the head box 2, and the slat 4 can be lowered. Therefore, this self-weight drop prevention device 8 can start the lifting operation of the slat 4 by pulling the lifting cord 7 directly below or directly in front of the blind 1, so that the left and right walls of the blind 1 can prevent the lifting/lowering operation of the blind 1. The slats 4 can be reliably moved up and down regardless of where the blind 1 is installed. The angle of inclination of the slope on which the rack 11 is provided may be appropriately set depending on the length of the blind in the vertical direction and the installation location.

Further, in the above embodiment, the rack 11 was provided on the slope facing upward, and the gear 12 was movable along the rack 11, but as shown in FIG. 5, the rack 17 was installed on the slope facing downward, The gear 12 may be movable along its rack 17.
In the case of such a configuration, the lifting cord 7 is pulled up to the front of the blind 1 as shown by the chain line in the same figure, and then the lifting cord 7 is pulled up to the head box 2.
If pulled in, the lifting cord 7 will move to the gear 12.
The slat 4 is held between the guide roller 15 and the guide roller 15.
is suspended and supported at the desired position. Then, if you pull the lifting cord 7 downward from this state, the lifting cord 7
is separated from the gear 12, the slat 4 can be raised or lowered as desired by operating the lifting cord 7.

Effects of the device As detailed above, this device does not require pulling the lifting cord 7 diagonally horizontally, unlike conventional devices.
Since the elevating operation of the slats can be started by pulling the elevating cord 7 directly below or directly toward the front of the blind 1, interference with the elevating and lowering operations caused by walls, etc. located on the sides of the blind 1 can be eliminated. Demonstrates excellent effectiveness.

[Brief explanation of the drawing]

Fig. 1 is a plan view showing a slat dead weight drop prevention device embodying this invention, Figs. 2 and 3 are longitudinal sectional views thereof, Fig. 4 is a front view of a blind related to this invention, and Fig. 5 is FIG. 7 is a sectional view showing another example of this invention. Blind 1, lifting cord 7, dead weight drop prevention device 8, racks 11, 17, gear 12.

Claims (1)

[Claims for Utility Model Registration] The slat 4 is pulled up by pulling the lifting cord 7 hanging down from one side of the head box 2, and the weight of the slat and bottom rail 5 is used to move the lifting cord 7 to the head box 2.
The slats 4 are lowered by being retracted inward, and the lifting cord 7 is held between a movable member that moves as the lifting cord 7 moves and a clamping means fixed inside the head box 2, thereby raising and lowering the head box 2. In the blind which prevents the slats 4 from lowering under their own weight by preventing them from being pulled into the headbox 2 when the cord 7 is not operated, the slats 4 are connected between a pair of side plates 10 provided on both sides of an opening 9 provided in the indoor side wall of the headbox 2. A clamping means 15 is provided to be rotatable along the longitudinal direction of the head box 2, and a rack 11 is provided between the side plates 10 and formed on a slope that descends toward the opening 9 side of the head box 2. , along the longitudinal direction of head box 2 as above,
It consists of a movable member 12 disposed to move diagonally toward the outside of the room of the head box 2 between the side plates 10 along the rack 11, and engages with the rack 11 by moving the movable member 12 toward the outside of the room. A device for preventing the dead weight of a blind slat from falling, characterized in that a lifting cord 7 is sandwiched between a movable member 12 and the clamping means 15.