JPH06117170A - Lift cord lock of venetian blind - Google Patents

Abstract

PURPOSE:To lift and lower a venetian blind easily by engaging the shaft of a retained roller with a selecting member to be guided to first-fourth positions, and by selecting the positions of the retained roller according to pulling or loosening a lift cord. CONSTITUTION:When a lift cord 8 is retained between a retaining member 13 and a retained roller 14 and the operating section of the lift cord 8 is pulled in a first state V that slats are stopped at a required position, then the shaft 16 of the retained roller 14 comes to a second position W. In this case, when the lift cord 8 is loosened, then the cord 8 is reversely moved and the shaft 16 comes to a third position X and is engaged with a land section 20. After that, when the lift cord 8 is pulled, then the shaft 16 comes to a position Y. When the operation of the lift cord 8 is stopped in this state, then the lift cord 8 is moved in the falling direction of the slats, and along with the movement, the shaft 16 is returned to the first position V, and the movement of the lift cord 8 is locked.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention supports a plurality of slats horizontally with a vertical interval with a ladder cord suspended from a head box, and is attached to a bottom rail arranged at the bottom of these slats. At least two lifting cords are guided upward through the group of slats to be introduced into the headbox, horizontally in the headbox to near one end of the headbox, and led out of the headbox, and vertically. A blind configured to form an operating portion of a lifting cord by hanging it down, pulling the lifting cord operating portion downward to pull up a group of slats, and loosening the lifting cord operating portion to lower the slats by its own weight. In particular, in the lifting cord stopper device for stopping the slats at the desired height in such blinds. It is intended to.

[0002]

2. Description of the Related Art Conventionally, in this type of blind,
Pull the operating part of the lifting cord downwards, and when the slats on the blinds reach the desired height, swing the operating part of the lifting cord to the right or left, put the upper end of the lifting cord operating part on the stopper, and A structure is generally used in which the stopper is actuated along with the upward movement to tighten the lifting cord to stop the movement of the lifting cord, thereby stopping the slat at a desired height. When lowering the slats, swing the operating part of the lifting cord in the opposite direction to the left or right to release the stopper and lower the slats by their own weight.

In any case, in the conventional blind, it is necessary to lock or unlock the lifting cord by swinging the operating portion of the lifting cord to the left or right, but depending on the place where the blind is attached, , Walls or other obstructions may prevent the lifting cord from locking or unlocking.

[0004]

SUMMARY OF THE INVENTION According to the present invention, when the blind is raised, the operating portion of the lifting cord is pulled down, and when the blind reaches a desired height, the operating portion of the lifting cord is released to move the blind to a desired position. When the blind is lowered, the operation part of the lifting cord is pulled down slightly to disengage the lifting cord from the stopper so that the blind can be lowered freely by the weight of the slats. It is intended to provide a cord stopper device.

[0005]

As a means for solving the above problems, the present invention supports a plurality of slats horizontally with a vertical interval with a ladder cord suspended from a head box. At least two lifting cords attached to a bottom rail arranged at the bottom of the slat group are guided upward through the slat group and introduced into the head box, and within the head box, near one end of the head box. Guide it horizontally, pull it out of the headbox, and hang it vertically to form the operating part of the lifting cord, and pull up the lifting cord operating part to pull up the slat group, and also lift the lifting cord operating part. In a blind in which the slat is lowered by its own weight by loosening it, the head box described above is used to stop the slat at the desired height. A lifting cord stopper device configured to lock or unlock the lifting cord each time the lifting cord operating portion is pulled or loosened is provided therein. A stopper case that passes horizontally, a holding member formed on the upper side of the end of the stopper case on the side connected to the bottom rail of the lifting cord, and the bottom surface of the stopper case with the movement of the lifting cord due to the weight of the slats. A nipping roller that rolls over and clamps the elevating cord between the above-mentioned nipping member at the end of the stopper case to stop the movement of the elevating cord; A switching member for stopping the rolling of the nipping roller associated with the movement of the lifting cord, the switching member sliding vertically with respect to the stopper case. It is arranged so that it can be elastically pressed against the stopper case by a spring, and the tip of the shaft of the nipping roller protruding through the guide groove formed in the stopper case is engaged with the inner surface of the switching member. A mating guide surface is formed, and a land portion that receives the shaft of the holding roller and locks the shaft of the holding roller so as to stop the movement of the holding roller accompanying the movement of the lifting cord due to the weight of the slats is formed on the guide surface. A first position around which the axis of the sandwiching roller is located when the sandwiching roller tightens the elevating cord.
A second position to move by pulling the lifting cord,
A third position where the lifting cord is loosened to move from the second position to be received by the land portion; and a fourth position where the lifting cord is then pulled to move from the third position. And a first position, a second position, a third position, and a fourth position, a step is provided so that the shaft moves in this order, and a blind lifting cord stopper device is provided. .

[0006]

In the blind raising / lowering cord stopper device of the present invention, the raising / lowering operation of the blind can be performed only by pulling the operating portion of the raising / lowering cord up and down. When the lifting cord is pulled once from the state where the blind is stopped moving up and down (the state where the stopper is working), the stopper is released and the slats are raised and lowered. In order to finish the lifting of the slats, when the slats are raised (while the lifting cord is being pulled), stop the lifting and loosen the lifting cord, and then pull it a little more to loosen it. When the slat is descending (while the lifting cord is loosened), the carrying is stopped for a while, and then the pulling cord is pulled a little more, and the lifting cord is loosened. That is, the stopper engagement state and the release state are alternately switched depending on the number of times the lifting cord is pulled. (Disengaged at odd times, engaged at even times)

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiments shown in the drawings will be described below.

FIG. 1 shows an embodiment of a blind according to the present invention. In the figure, 1 is a head box, and 2 is a ladder cord suspended from this head box. The upper end of the ladder cord is hung on a rotary drum 4 attached to a rotary shaft 3 arranged in the head box. A plurality of slats 5 are horizontally supported by the ladder cords 2 with a vertical space therebetween. The rotary shaft 3 is rotated from the rotary operation rod 6 via the rotation transmission mechanism 7, and further rotates the slats 5 via the ladder cord 2.

At least two lifting cords 8 attached to a bottom rail (not shown) arranged at the bottom of the slat group are guided upward through the slat group and introduced into the head box 1 to It is guided horizontally in the box to the vicinity of one end of the head box, goes out of the head box, and hangs vertically to form an elevating cord operating section 9,
The knob 10 is attached to the lower end thereof.

In this blind, the slat group is pulled up by pulling down the lifting cord operating portion 9, and the slats are lowered by its own weight by loosening the operating cord operating portion.

According to the present invention, in order to stop the slat at a desired position, the lifting cord is locked or unlocked each time the lifting cord operating portion 9 is pulled or loosened in the head box 1. An elevating cord stopper device 11 configured to operate is provided.

The elevating cord stopper device 11 has a stopper case 12 through which the elevating cord passes substantially horizontally, and a holding member 13 is formed above the end of the stopper case on the side of the elevating cord connected to the bottom rail. .

As the lifting cord 8 is moved by the weight of the slats, it rolls on the bottom surface of the stopper case, and the lifting cord 8 is held between the end of the stopper case and the holding member 13.
A holding roller 14 is provided to lock the wheel so that it cannot move further.

In the preferred embodiment, a knurl is formed on the bottom surface of the case 12, the nipping roller 14 is formed as a knurl roller that engages with this knurl, and the bottom surface of the case is inclined upward toward the nipping member 13. It is formed as the surface 12a.

Further, there is provided a switching member 15 for stopping the rolling of the holding roller 14 due to the movement of the lifting cord due to the weight of the slats. The switching member 15 is arranged so as to be slidable up and down with respect to the stopper case and is elastically pressed against the stopper case by a spring 17, and the stopper case is provided on the inner side surface of the switching member. A guide surface 19 is formed which engages with the tip end of the shaft 16 of the nip roller 14 protruding through the formed guide groove 18. The guide surface is provided with a land portion 20 that receives the shaft 16 of the holding roller 14 and stops the shaft 16 of the holding roller 14 so as to stop the movement of the holding roller 14 due to the movement of the lifting cord due to the weight of the slats. The first position V where the shaft of the nipping roller is located when the nipping roller tightens the lifting cord, the second position W where the hoisting cord is moved to move, and the second position W where the lifting cord is loosened. A third position X which is moved from the position and is received in the land portion, and a fourth position Y which is moved from the third position by pulling an elevating cord next. Steps A, B, C, and D are provided between the second position W, the third position X, and the fourth position Y so that the shaft moves in this order.

The operation of the device of the present invention will be described below with reference to FIGS. 4 (a), (b), (c), (d) and FIG.

In FIG. 4A, the lifting cord 8 is sandwiched between the sandwiching member 13 and the sandwiching roller 14, so that the shaft 16 of the sandwiching roller is located when the slats are stopped at the desired position. The state at the position V is shown. When the operating portion 9 of the lifting cord 8 is pulled from this state, the shaft 16 of the holding roller 14 comes to the second position W shown in FIG. 4B along with this. When the lifting cord is loosened here, the lifting cord moves backward due to the weight of the slats, and the shaft 16 of the nip roller 14 comes to the third position X shown in FIG. Be stopped. In this state, the lifting cord moves freely without being affected by the stopper mechanism to lift the slat. Next, when the lifting cord is pulled, the shaft 16 comes to the third position Y shown in FIG. If the operation of the lifting cord is stopped in this state, the lifting cord moves in the slat descending direction due to the weight of the slat, and along with this, the shaft 1
6 returns to the initial first position V, and the movement of the lifting cord is stopped.

FIG. 5 briefly shows the operation sequence shown in FIG. 4, and FIG. 6 shows the above-mentioned guide surface in a perspective view. On this guide surface, since the steps A, B, C, D are formed between the first, second, third and fourth positions, the shaft 16 does not move in the opposite direction.

7 (a), (b), (c), and (d) show the relationship between the nipping roller, nipping member, and lifting cord when the shaft 16 is in the first, second, third, and fourth positions, respectively. Indicates.

As described above, in the stopper mechanism of the present invention, when the lifting cord is pulled, the stopper device is released,
The slat is raised to a desired position, and when the raising / lowering operation is stopped there, the raising / lowering cord is lowered by the weight of the slat and stopped by the holding roller. Next, when trying to lower the slats, the pulling cord is pulled a little, the stopper mechanism is released, and the slats freely descend.

[0021]

According to the present invention, the lifting cord can be locked or unlocked only by pulling the lifting cord operating portion downward, and the lifting cord operating portion can be moved to the left or right as in the conventional case. Since it is not necessary to shake it, the lifting operation can be performed easily.

Further, since the stopper device is not arranged at the place where the lifting cord is led out from the head box,
Only the opening through which the lifting cord is inserted is provided, the opening can be made very small, and the design is excellent.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of a blind according to the present invention.

FIG. 2 is a perspective view of a lifting cord stopper device according to the present invention.

FIG. 3 is an exploded perspective view of the lifting cord stopper device shown in FIG.

4 (a), (b), (c), and (d) are explanatory views for explaining the operation of the device of the present invention.

5A and 5B are diagrams schematically showing the order of operations shown in FIG.

FIG. 6 is an explanatory view of a switching member.

7 (a), (b), (c), and (d) FIG. 7 is a view showing a state of the lifting cord stopper device corresponding to the position of the shaft shown in FIG.

[Explanation of symbols]

 1: Head Box 2: Ladder Code 3: Rotating Shaft 4: Rotating Drum 5: Slat 6: Rotation Operating Rod 7: Rotation Transmission Mechanism 8: Lifting Code 9: Lifting Cord Operating Unit 10: Stopper Device 11: Lifting Cord Stopper Device 12 : Stopper case 12a: Inclined surface 13: Clamping member 14: Clamping roller 15: Switching member 16: Shaft 17: Spring 18: Guide groove 19: Guide surface 20: Land part

Claims (1)

[Claims] 1. A plurality of slats are horizontally supported at a vertical interval with a ladder cord suspended from a head box, and at least two slats are attached to a bottom rail arranged at the bottom of these slats. The elevating cord is guided upward through the group of slats and introduced into the headbox, and is horizontally guided in the headbox to the vicinity of one end of the headbox, and is led out of the headbox, and is vertically hung to raise and lower the cord. Of the slat group is formed by pulling the operating portion of the
In a blind in which the slats are lowered by their own weight by loosening the lifting cord operating portion, the lifting cord operating portion is pulled or loosened in the head box in order to stop the slats at a desired height. An elevating cord stopper device configured to lock or unlock the elevating cord is provided for each, and the cord stopper device includes a stopper case through which the elevating cord passes substantially horizontally and a bottom rail of the elevating cord. The holding member formed on the upper side of the end of the stopper case on the connected side, and the holding member is rolled on the bottom surface of the stopper case with the movement of the lifting cord due to the weight of the slat and the above-mentioned holding at the end of the stopper case. A nipping roller for tightening the elevating cord between the member and the movement of the elevating cord, and the nipping roller A switching member that engages and stops rolling of the nipping roller that accompanies movement of the lifting cord due to the weight of the slat, and the switching member is arranged so as to be slidable vertically with respect to the stopper case; The spring is elastically pressed against the stopper case, and the inner surface of the switching member has a guide surface with which the shaft tip of the nipping roller protruding through the guide groove formed in the stopper case engages. Formed, this guide surface has
The holding roller is provided with a land portion that receives the shaft of the holding roller and stops the shaft so that the movement of the holding roller due to the movement of the lifting cord due to the weight of the slat is stopped. The first position where the axis of the nip roller is located when tightening the, the second position where the lifting cord is moved, and the second position where the lifting cord is loosened to move from the second position to receive the land. A third position to be stopped, and a fourth position to be moved from the third position by pulling the lifting cord next, between the first position, the second position, the third position and the fourth position. The lifting cord stopper device for the blind is characterized in that a step is provided so that the shaft moves in this order.