JP2914845B2 - Blind lifting code stopper device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blind and, more particularly, to a stopper device for a lifting cord, and more particularly, is hung horizontally with a ladder cord suspended from a head box at an interval vertically. Lifting and lowering provided between the state in which a large number of groups of slats are folded just below the head box and the state in which the group is spread out over the entire surface of a window and the like, including the intermediate state. The present invention relates to a stopper device for a cord.

[0002]

2. Description of the Related Art Conventionally, in a blind which is generally provided for the purpose of adjusting light shielding of a window surface, as a light shielding adjusting means, a group of slats which are developed at intervals above and below the window surface is used. Along with a ladder cord operating mechanism for adjusting the tilt state, the slat group is moved from a state in which the slat group is deployed on the window surface to a state in which the slat group is folded to the upper edge portion of the window surface (there is also an intermediate state between them). An operation mechanism for raising and lowering is provided.

[0003] As a conventionally known technique for operating the slat group up and down, a technique is known in which the up / down cord is pulled up and the bottom rail at the lower end of the slat group is raised to a predetermined height. An operating mechanism for swinging the knurled roller between the knurled roller and a fixed portion and stopping the movement by the swinging operation is typically known.

[0004] In addition, instead of the operation of swinging the lifting code to the left and right, an operation mechanism has been proposed which can stop and stop the movement of the lifting code only by pulling the lifting code. In the following description, this is referred to as a “cord pulling operation type lifting operation mechanism” for convenience.

The structure of the cord pulling operation type lifting operation mechanism will be briefly described. The slat side turning position for turning a cord in a head box downward to suspend a slat group, and a lifting code operation section. (Hereinafter referred to as an “operation cord portion”), the cord is turned to be pulled out of the head box, and the elevating operation cord portion side turning position is between
A stopper case having an insertion opening through which the lifting cord extending horizontally between these positions passes is provided, and the lifting cord is pulled into the stopper case (that is, an operation of folding up the slat group), Each time the cord is loosened (that is, the operation of expanding the slat group), the movement of the cord is locked, and a cord stopper device for releasing the lock is housed. In this cord stopper device, the movable holding roller housed in the stopper case is located at a cord locking position (first position) which is a limit point of the moving range near the slat side turning position.
Then, the free movement of the cord in the loosening direction is stopped by being clamped by the fixed portion, and the cord is pulled from this state to operate the first cord.
When the gripping roller is moved from the position to a second position allowing free movement of the cord in the pulling direction, and then the pulling operation is stopped and the operation is switched to the operation in the loosening direction, the holding roller is moved to the third position allowing the free movement of the cord in the loosening direction. When the clamping roller is moved, and then the cord is loosened and the operation is switched to the pulling direction again, the clamping roller is moved to the fourth position allowing the cord to freely move in the pulling direction, and then operated again. Is switched to the operation of loosening the cord, so that the first
A series of circulating operations of returning the holding roller to the position are performed.

[0006] In short, the lifting cord, which receives the force to move in the direction in which the slat group expands (spreads downward) by the weight of the bottom rail at the lower end, is held at the first position by the holding roller and the fixing portion. Stop (lock) with only force,
This can be achieved by simply switching the operation between pulling and loosening the cord.
The positions of the holding rollers are moved in the order of third, fourth, and first, and a predetermined action is performed at each of these positions, that is, the second position allows the cord to freely move in the pulling direction. The cord is allowed to move freely in the loosening direction, is allowed to move freely in the pulling direction in the fourth position, and is returned to the first position again. There is provided a member having a guide path for causing the above-described movement to be performed as described above.

[0007]

According to the experience of the inventor of the present invention, when a concrete blind to which the above-described conventional cord pulling operation type lifting / lowering operation mechanism is actually applied is prepared, It has been found that there is a problem to be solved further.

[0008] This is because when the entire slat group is folded up immediately below the head box and locked, the next time the slat group is loosened and deployed, the stopper cannot be smoothly released in some cases. The problem was that there was.

As a result of intensive studies on the cause of this problem, the present inventor has found the following fact. In other words, it has been found that the above problem does not always occur, but rather occurs to some extent in relation to the amount of force applied during the cord pulling operation, and tends to often appear particularly when the cord is strongly pulled. Therefore, when further studying such a phenomenon, when the slats were folded directly under the headbox, the slats were brought into contact with the headbox and the cord was pulled more strongly while being unable to move any more. Yes, in this case, the above-mentioned problem occurred.

[0010] In other words, in order to pull the cord more strongly than necessary, the cord made by knitting a natural fiber or a synthetic fiber usually grows more than expected for a moment, and the growth and the return of the growth are affected. It has been found that the stopper device locked by the holding roller cannot be released smoothly. In the following, such a defect accompanied by elongation of the cord is referred to as a “pull-out” phenomenon.

Therefore, the present inventor has provided an elevating cord stopper device which is devised so that the stopper device can be released smoothly and stably at all times even if the cord is stretched as described above. The present invention is proposed for the purpose.

[0012]

The feature of the lifting cord stopper device in the blind according to the present invention is that a head box is provided so that the slat group of the blind can be suspended and the slat group can be folded and unfolded. And a cord stopper device for locking and unlocking the movement of the lifting / lowering cord provided inside and outside the head box in a head box for locking and releasing the movement of the cord. Has a holding roller movable in the horizontal direction in a stopper case, and a guide member for guiding the movement of the holding roller.
A first guide path for moving and guiding the holding roller from a first position where free movement in the cord loosening direction is locked by holding the fixed portion and the holding roller, to a second position where free movement of the cord in the pulling direction is allowed. , Allowing the cord to move freely in the loosening direction
A second guide path for moving and guiding the holding roller to a position, a third guide path for moving and guiding the holding roller to a fourth position allowing free movement of the cord in the pulling direction, and moving from the fourth position to the first position. A fourth guide path for returning the holding roller is provided. The moving length L1 of the holding roller by the first guide path and the moving length L2 of the fourth guide path by L1 <L2. Although the elongation at the time of pulling that can be considered for the lifting cord is usually very small, the difference between the first and fourth guide paths (L2-L1) is provided.
Is preferably set sufficiently larger than the elongation.

According to the cord stopper device having such a configuration, even if the elevating cord is stretched, the stopper device can always be reliably and stably released smoothly.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to an embodiment shown in the drawings.

FIG. 1 is a front view of a blind to which the present invention is applied. In FIG. 1, reference numeral 1 denotes a head box, and 2 denotes at least two or more positions of the head box 1 (one in the figure). Ladder cord suspended from a ladder cord. The upper end of the ladder cord 2 is connected to a rotating drum 4 attached to a rotating shaft 3 disposed in the head box 1. Is connected to a bottom rail (not shown), and is provided so as to horizontally support a large number of slats 5 at intervals along the way. The rotating shaft 3 is rotated by an operation of an external rotating operating rod 6 via a rotating operating mechanism 7, so that the posture of the slat 5 can be rotated within a range of approximately 180 °.

Reference numeral 8 denotes at least two lifting / lowering cords provided inside and outside the head box 1, and one end of each of the two lifting / lowering cords 8 extends downward from a position horizontally separated from the head box 1. It is suspended and connected to the bottom rail, and is led to near one end in the horizontal direction in the head box 1 so as to be integrated into two, and is led out of the head box 1 to form the operation cord portion 9 of the lifting cord, A knob 10 is attached to the other end. In the example of FIG. 1, the lifting cord 8 can be led out of the head box by providing the rotary operation rod 6 in a cylindrical shape and extending from the lower end of the operation rod 6 through the cylinder to be pulled. .

In the drawing, reference numeral 81 denotes a slat-side turning position at which the lifting cord 8 in the head box 1 is turned downward by a roller (not shown). Reference numeral 82 denotes a lifting cord which is also led out of the head box by a roller 71. The turning position on the side of the elevating operation unit which is turned as shown in FIG.

With the above configuration, the slat group is folded up by pulling the operation cord portion 9 of the lifting cord 8, and by loosening the slat group by the weight of the slat 5 and the bottom rail, the slat group is developed in the state shown in the figure. Become.

The free movement of the lifting cord 8 in the loosening direction is provided so as to be locked by a cord stopper device 11 provided inside the head box 1, and the state of the cord locking and pulling A state in which the free movement in the pulling direction and the free movement in the loosening direction are alternately permitted by switching between the operation and the loosening operation is performed by a series of circulating operations as described below. The configuration of the device 11 has the feature of this example.

Hereinafter, the cord stopper device 11 will be described.

The cord stopper device 11 of this embodiment is
As shown in the exploded perspective view of FIG. 3, a stopper case 12 fixed to the head box 1 and a holding roller 14 that rolls on the bottom surface of the stopper case 12.
And a guide member 15 for guiding the movement of the holding roller 14.

In the stopper case 12 of the present embodiment, a first part in which one side wall 122 and an opposite side wall 124 are integrated from a bottom part 121 and a second part which forms a ceiling part 123 are combined by an appropriate concave and convex fitting part. A case body having a rectangular parallelepiped shape is formed and provided so as to have a cord insertion opening penetrating in the longitudinal direction thereof, and a knurl is formed on a bottom surface of the bottom portion 121 facing the code insertion opening as shown in the drawing.
Nipping roller 1 on which knurls are also formed
4 rolls. In addition, the above-mentioned ceiling part 123
At the end near the slat side turning position 81, there is provided a fixed holding section 13 for holding the cord together with the holding roller 14 and locking the movement thereof in a slightly swelled downward shape. .

The opposite side wall 124 of the first part is
The guide member 15 is provided in a box shape having a vertical hole for accommodating the guide member 15, and the guide member 15 is provided in the vertical hole.
Both ends in the longitudinal direction are supported by a leaf spring 17 fixed to the stopper case 12 so as to be movable in the vertical direction. Reference numerals 151 and 152 denote claws for sandwiching the leaf spring 17 from above and below (see FIGS. 4 and 5). The side wall 124 is formed with a slot-shaped guide groove 18 through which the shaft 16 of the holding roller 14 penetrates. The shaft 16 of the holding roller 14 passes through the guide groove 18 and is guided by the guide member 15 described below. Are provided in such a manner as to engage with the guide path. The position (height) at which the elevating cord 8 is erected is set to such a degree that it always comes into light contact with the upper part of the holding roller 14 except for the case of holding the holding cord 13 as shown in FIG.

Reference numeral 19 denotes a guide path provided in the guide member 15, and the shaft 16 of the holding roller 14 is engaged with the guide guide member 15 in accordance with switching between the pulling operation and the loosening operation of the lifting / lowering cord 8. Roller 14 is moved from first position to second position
The third position → the fourth position → the first position are provided so as to circulate in order. In performing this series of circulating movements, in this example, the holding roller 14 always rolls on the bottom surface of the stopper case 12, while the guide member 15 slightly moves up and down to move the shaft 16 and the guide member. The engagement state of the path 19 is ensured.

As shown in FIG. 3, the guide path 19 of the present embodiment has a pair of guide walls 191 and 192 each having a U shape.
Are provided so as to face each other to form one guide guideway. From the first position where the cord is held between the fixed holding portion 13 and each of the guide guideways 19 on the way through the guide guideway 19, From the second position and the third position provided as the V-shaped concave portions of the guide wall, the guide wall passes through the guide guideway to reach the fourth position provided as a limit position on the opposite side to the first position. It is provided so as to get over the top and return from the fourth position to the first position.

Next, the relationship between the operation state of the lifting cord 8 and the movement of the holding roller 14 will be described with reference to FIG.

In FIG. 6A, the lifting code 8 is
The movement (movement in the slat deployment direction) is locked by the holding of the fixed holding portion 13 of the stopper case 12 and the holding roller 14 (the holding roller is at the first position).

Next, when the operation cord 9 of the lifting cord 8 is pulled, the holding roller 14 is moved to the left side in FIGS.
The shaft 16 is guided into the guideway 19 and is guided by the guide wall 191.
The engagement with the concave portion of the V-shape is stopped (second position). The path of this movement is the first guide path, the movement length of which is given by L1, and the length of the shaft 16 (i.
With the movement of 4) stopped, the movement of the cord in the direction of the arrow in FIG. 6B, that is, the pulling operation is allowed, and the slat can be folded up to an arbitrary height.

Next, when the operation of the lifting cord is switched to the loosening direction, the holding roller 14 is moved to the right side in FIGS. 1 and 6 by the cord, and the shaft 16 is guided into the guiding guideway 19 to form the guide wall 192. It is stopped by engaging with the letter-shaped recess (third position). The path of this movement is the second guide path, and the movement of the cord in the direction of the arrow in FIG. 6C, that is, the loosening operation, is allowed while the movement of the shaft 16 (that is, the holding roller 14) is stopped. The slats can be lowered (deployed) to any height.

Thereafter, when the operation of the lifting cord is switched to the pulling direction, the holding roller 14 is controlled by the cord in FIGS.
6D, the shaft 16 exits from the guideway 19, and the limit point (fourth position) on the left side of the drawing shown in FIG.
And is stopped. The path of this movement is the third guide path, and the pulling operation is allowed, and the slats can be completely folded at an arbitrary height, for example, directly below the headbox 12.

When the lifting cord is loosened from the fourth position, the shaft 16 (holding roller 14) returns to the first position in FIG. 6A, and the cord 8 moves (moves due to its own weight such as a bottom rail). Return to the state of locking. The path of this movement is the fourth guide path, and the movement length of the axis at this time is L2 (>
L1).

By repeating the above operation, the lifting code is stopped in connection with the operation of raising and lowering (unloading) the blind, and the first guideway is stopped as described above. Since the moving length L2 and the moving length L1 of the fourth guideway are L2> L1, the cord pulling operation in FIG. 6C is performed excessively, and the above-described pulling phenomenon occurs. However, due to the difference of L2 -L1, the elongation of the cord at the time of pulling is absorbed, and a smooth loosening operation (that is, a transition from the state of FIG. 6A to the state of FIG. 6B) can be secured.

The present invention is not limited to the embodiment shown in FIGS. 1 to 6, and it goes without saying that the present invention can be implemented in various modified forms. For example, as shown in FIG. 7, the lifting code 8 may be led out of the head box from a position different from the position where the rotary operation rod 6 of the ladder code is turned.

[0034]

As described above, according to the lifting / lowering cord stopper device of the present invention, the stopper device can be smoothly released even if there is a pulling phenomenon that occurs when the lifting / lowering cord is folded up. The effect is obtained.

[Brief description of the drawings]

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

FIG. 2 is a perspective view showing one embodiment of a cord stopper device of the present invention.

FIG. 3 is an exploded perspective view of parts of the cord stopper device of FIG. 2;

FIG. 4 is a vertical sectional front view showing an assembling relationship between a stopper case and a guide member of the cord stopper device of FIG. 2;

FIG. 5 is a longitudinal sectional side view of the cord stopper device of FIG. 2;

FIG. 6 is a view for explaining the order of operation of the cord stopper device of FIG. 2;

FIG. 7 is a front view showing another embodiment of the blind according to the present invention.

[Explanation of symbols]

1: head box, 2: ladder cord, 3: rotating shaft, 4: rotating drum, 5: slat, 6: rotating operation rod, 7: rotation transmitting mechanism, 8: elevating cord, 9: operation cord, 11: stopper Device, 12: stopper case,
13: fixed holding portion, 14: holding roller, 15: guide member, 16 axis: 17, leaf spring: 18, 18: guide groove, 1
9: Guideway.

Claims (2)

(57) [Claims] 1. A method of suspending a group of slats of a blind and pulling or loosening a lifting cord provided inside and outside a head box so that the slat group can be folded and unfolded. A blind in which a code stopper device for locking and unlocking the movement of a cord is accommodated in a head box, the code stopper device includes a holding roller movable in a horizontal direction in a stopper case, and a holding roller for the holding roller. And a guide member for guiding the movement of the cord in a pulling direction from a first position in which the free movement in the cord loosening direction is locked by clamping between the fixing portion and the clamping roller. A first guideway for guiding the movement of the holding roller to a second position allowing the cord to move, and a third position allowing a free movement of the cord in the loosening direction. The second moving guide the Ra
A third guideway for moving and guiding the holding roller to a fourth position allowing free movement of the cord in the pulling direction, and a fourth guideway for returning and guiding the holding roller from the fourth position to the first position. A guide path, wherein a moving length L1 of the holding roller by the first guide path and a moving length L2 by the fourth guide path are provided such that L1 <L2. Cord stopper device. 2. A slat-side turning position for turning a lifting cord in a head box downward so as to suspend a slat group, and a lifting operation part for turning the lifting cord as an elevating operation part to pull it out of the head box. Between the turning position, a stopper case having an insertion opening through which the elevating cord stretched horizontally between these positions passes is provided, and in the stopper case, every time the elevating cord is pulled or loosened, The blind has a code stopper device for stopping the movement of the cord and releasing the lock. The blind has a code stopper device which accommodates a holding roller movable within a predetermined range in the horizontal direction in a stopper case. A guide member for guiding the movement of the holding roller is provided. The guide member is located close to the slat-side turning position in the moving range. From the first position where the free movement in the cord loosening direction is locked by the clamping between the fixed portion and the holding roller from the first position. A first guide path for guiding the movement of the holding roller to a second position allowing movement, and a third position allowing free movement of the cord in the loosening direction from the second position by switching the pulling operation to the operation in the loosening direction. A second guide path for guiding the movement of the clamping roller, and moving the clamping roller from the third position to a fourth position allowing free movement of the cord in the pulling direction by switching the loosening operation to the operation in the pulling direction. And a fourth guide path for returning and guiding the holding roller from the fourth position to the first position in accordance with the switching of the pulling operation to the operation in the loosening direction. Guideway In the configuration code stopper device as pinching roller performs the 1 → first 2 → first 3 → the 4 → first circulation operation through a moving length L1 of the pinching roller according to the first guideway,
A lifting and lowering cord stopper device for a blind, wherein a moving length L2 of the fourth guide path is set to satisfy L1 <L2.