JPH0328709Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an improvement of a device for operating a cord of a blind or the like.

[Conventional technology]

Lifting and lowering of Venetian blinds, roller blinds, etc. is performed via a cord operating device. In the conventional device, as disclosed in Utility Model Publication No. 56-015356, the blind stops when the cord is brought close to the stopper roll and released, and the blind is lowered when the cord is moved away from the stopper roll and released. Since the angle at which the cord is pulled or released depends on the angle at which the cord is pulled, it requires some skill, and there was a problem in that the blinds could not be easily operated until the trick was learned.

[Problem that the invention attempts to solve]

The present invention was developed in view of the above, and its purpose is to be able to reliably stop or lower the blind by simply pulling and releasing the cord, without requiring any special skill to operate it. The goal is to provide equipment.

[Means for solving problems]

In order to achieve the above object, the feature of the present invention is to pass the cord between two guide members and brake the cord by pushing a stopper roll between the guide members. The sliding stopper body is pushed between the two guide members by the sloped surface thereof. The cord is hung on the pull roll of the stopper body and pulled downward, and the stopper body also moves up and down as the cord goes up and down.
Its height is regulated by a cam mechanism. The cam mechanism includes a cam groove consisting of a Y-shaped groove provided in the stopper body and a V-shaped land portion protruding into the cam groove, and a stopper frame that accommodates the stopper body in a vertically slidable manner, and one end is connected to the cam groove. Consists of engaging cam pins.

[Effect]

When the cam pin is at the lower end of the Y-shaped groove of the cam groove of the stopper body, the stopper body is at the highest position.
The slope of the stopper body pushes the stopper roll between the guide members to brake the cord and stop the blind. Then, when the cord is pulled downward, the stopper body descends with the cord until the cam pin hits the upper end of one of the Y-shaped grooves, and the stopper roll separates from the cord, so that the cord is pulled down and the blind is raised. Then, when the cord is released, the stopper body rises together with the cord until the cam pin fits into the recess in the V-shaped land portion, but since the stopper roll remains separated from the cord, the blind continues to descend under its own weight. Then, when you pull the cord a little and release it again, the stopper body descends until the cam pin hits the other upper end of the Y-shaped groove, and then rises until it hits the lower end of the Y-shaped groove, so that the stopper roll is moved between the guide members. is pushed in again, braking the cord and the blind stops.

〔Example〕

The apparatus of the present invention will be explained based on the embodiments shown in the drawings.

As shown in FIG. 1, one end is the bottom rail 11.
Code 1 of Venetian blinds locked in
0 and 10 pass through the holes in each slat 12 and rise into the top box 13, then pass around the guide roll 14 and enter the stopper frame 20 in the horizontal direction, and then pass through the stopper body and exit from the stopper frame. It is pulled vertically downward again. A serrated roll support 19 is provided on the ceiling at the entrance of the stopper frame 20, and a guide roll 18 is rotatably supported on the lower side.

A stopper body 21 is installed inside the stopper frame 20 so as to be vertically slidable. A slope 22 is formed on both sides of the upper end of the stopper body 21, and a stopper roll 23 is arranged between the slope, the guide roll 18, and the roll receiver 19 so as to be rotatable and movable in a direction orthogonal to the axial direction. A gap 24 is formed in the center of the upper half of the stopper body 21, and a pair of upper and lower pulling rolls 25, 26 are rotatably supported in the gap. The lower half of the stopper body 21 is a cam portion 27, and a cam groove 30 is formed on the end surface of the cam portion. One end of a cam pin 28 is slidably fixed to the stopper frame 20, and the other end of the cam pin is fitted into a cam groove 30. A spring 29 fixed to the stopper frame 20 prevents the cam pin 28 from falling off.

The cord 10 passes through the guide roll 18 and rotates between the lower traction rolls 25 and 26, but the axis of the upper traction roll 25 is closer to the guide roll 18 than the axis of the lower traction roll 26. . The stopper body 21 moves up and down together with the cord 10 until it is regulated by the cam pin 28. When the stopper body 21 rises to the position shown by the chain line, the stopper roll 23 is pushed up to the slope of the stopper body 21 and wedges between the guide roll 18 and the roll receiver 19 and presses down the cord 10, so that the cord 10 cannot be moved. be stopped.

Next, the operation of the device of the present invention will be explained. A cam groove 30 carved in the cam portion 27 of the stopper body 20 that is vertically slidably inserted into the stopper frame 20.
consists of a substantially Y-shaped groove portion 31 and a substantially V-shaped land portion 32 protruding from the center of the groove portion. One end of the cam pin 28 fits into the groove 31, and the other end is fixed to the stopper frame 20. When the blind is stopped, the stopper body 21 is at the highest position shown by the chain line in FIG.
At this time, cam pin 2
One end of 8 is connected to the Y-shaped groove 3 as shown in FIG.
1, and limits the rise of the stopper body 21.

When the blind is stopped, when the cord 10 is pulled downward, the cord 10 is pulled by the traction rolls 25, 2.
6, the stopper body 21 is lowered to the position shown by the solid line in FIG.
Release the restriction of 0. As a result, the cord 10 is pulled out downward, and the bottom rail 11, ie, the blind, rises. At this time, as shown in FIG. 3, the cam pin 28 is located at the upper end B of one of the Y-shaped grooves 31 and limits the descent of the stopper body 21, so that the cord is pulled out around the pulling roll. .

Next, when the cord 10 is released, the cord 10 is pulled up by the weight of the bottom rail, so the stopper body 21 initially rises together, but as shown in FIG. Since the stopper body 21 is engaged, the upward movement of the stopper body 21 is restricted. Therefore, the stopper body does not reach the position where it pushes up the stopper roll, so the cord is not braked by the stopper roll and is pulled up around the traction roll, and the blind continues to descend. Next, when the cord 10 is slightly pulled and released, the stopper body 21 descends slightly and the cam pin 28 reaches the other upper end D of the Y-shaped groove 31 shown in FIG.
As the cord 10 is pulled up by the weight of the bottom rail, the stopper body 21 rises, so that the cam pin 28 reaches the lower end A of the Y-shaped groove 32 in FIG. As a result, the stopper body 21 rises to the highest position, and the stopper roll 23 brakes the cord 10 again to stop the blind.

[Effects of the invention] As mentioned above, since the device of the present invention is equipped with a cam mechanism, unlike conventional devices that pull up the cord and stop or raise/lower the blind depending on the angular direction, the device of the present invention simply pulls down the cord. You can stop, raise and lower the blinds with just a single touch. Therefore, it has an excellent effect that conventional methods do not require any skill in operation.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of a main part of a blind equipped with a device according to an embodiment of the present invention, and FIGS.
FIG. 2 is an enlarged front view of the cam mechanism shown in FIG. 2 when the blind is stopped, FIG. 3 is when the blind is raised,
FIG. 4 shows the states that occur when the blind is lowered, and FIG. 5 shows the states that occur when the blind is stopped while it is being lowered. In the figure, reference numeral 10 is a cord, 18 is a guide roll, 19 is a roll receiver, 20 is a stopper frame, 21 is a stopper body, 22 is a slope, 23 is a stopper roll, 25 and 26 are traction rolls, 27 is a cam part, and 28 30 is a cam groove, 31 is a Y-shaped groove, and 32 is a V-shaped land portion.

Claims (1)

[Claims for Utility Model Registration] 1. In a device for braking the cord by pushing a stopper roll between two guide members through which the cord passes, the stopper body is fitted into a stopper frame so as to be vertically slidable, forming a slope that pushes the stopper roll between the two guide members when it rises to the main body, hooking the cord to a traction roll provided on the stopper main body and pulling it downward, and carving a cam groove in the main body;
One end of the cam pin is fitted into the cam groove, the other end is pivotally attached to the stopper frame, and the cam groove is inserted into the Y
It is formed of a V-shaped land portion protruding into the groove, and when the cord moves the stopper body up and down via the traction roll,
One end of the cam pin sequentially passes through the lower end of the Y-shaped groove, the upper end of one of the Y-shaped grooves, the recess of the V-shaped land portion, and the upper end of the other Y-shaped groove, and is located at the lower end of the Y-shaped groove. A blind cord operating device characterized by determining the height of the stopper body. 2 One of the two guide members is formed into a guide roll and the other is formed into a saw-toothed roll receiver, and the traction roll is set as a set of upper and lower parts, and the upper axis is closer to the guide roll side than the lower axis. The blind cord operating device according to claim 1, characterized in that it is formed from two rolls.