JPH0735116Y2 - Ladder cord mounting structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (b) Industrial field of application The present invention relates to a ladder cord used for variably adjusting a light blocking angle of a slat that constitutes a blind in a blind that is electrically or manually opened and closed. Mounting structure.

(B) Conventional Technology As a conventional attachment structure of a ladder cord used in the above-mentioned blind, for example, as shown in FIG. 6, a metal ring 18 is fitted on the outer peripheral surface of a cylindrical operation drum 17. After fixing and winding the upper ends of the two cords 5a, 5a constituting the ladder cord 5 around the locking claws 18a, 18a provided on the outer peripheral surface of the metal ring 18, respectively, Claw 1
Bending 8a and 18a to the outer peripheral surface side fixes the upper ends of the two cords 5a and 5a, respectively.

(C) Problems to be solved by the invention However, since the operation drum 17 and the ladder cord 5 are manually attached, the locking claw 18a and the cord 5a protruding from the outer peripheral surface of the metal ring 18 are provided. The fixed position with
It requires skill to suspend and fix the two cords 5a, 5a to the operation drum 17 in a uniform length on the left and right, and a metal ring.
Since the locking claws 18a, 18a protruding from the 18 and the two cords 5a, 5a are fixed one by one, there is a problem that it takes time and effort to attach the ladder cord 5.

Further, the cords 5a, 5a are fixed on the outer peripheral surface of the metal ring 18 fitted to the operation drum 17, respectively, and the cords 5a, 5a are fixed.
Are wound on the outer peripheral surface of the metal ring 18, respectively. Therefore, when the operation drum 17 is rotated, the cord 5a rides on the locking claw 18a protruding on the outer peripheral surface of the metal ring 18, and the two cords 5
Since there is a difference in the hanging size of a and 5a and the winding amount, the rotating operation of the operation drum 17 and the angle of the slat 6 do not change correspondingly, and there is also a problem that operability is impaired. .

In view of the above problems, this invention inserts and fixes the insertion end formed at the upper end of the ladder cord into the shaft end of the operation drum, so that the operation drum and the ladder cord can be easily attached and detached. On the other hand, it is an object of the present invention to provide a ladder cord mounting structure capable of suspending and fixing two cords in equal lengths on the left and right.

(D) Means for Solving Problems The present invention is directed to a ladder cord, in which two cords forming a ladder cord are integrally fixed to each other at the same dimensional positions of the upper ends with a stopper to form an insertion end. It is characterized in that it is a ladder cord mounting structure for inserting and fixing the insertion end portion of the cord into an insertion groove portion formed at the shaft end portion of the operation drum.

(E) Operation In this invention, the insertion end formed by integrally fixing the upper end portions of the two cords forming the ladder cord at the same size position with the stopper is formed at the shaft end portion of the operation drum. By inserting into the insertion groove, the two cords forming the ladder cord are suspended and fixed to the operating drum so as to have an equal length on the left and right, and the attachment and removal of the ladder cord to the operating drum are facilitated.

(F) Effect of the Invention According to this invention, since the insertion end formed on the upper end of the ladder cord is formed by fixing the upper ends of the two ladder cords with the stoppers, the same dimension position of the ladder cord can be obtained. Easy to stop. Further, by simply inserting this insertion end into the insertion groove formed in the shaft end of the operating drum, the two cords forming the ladder cord can be suspended and fixed to the operating drum in equal lengths on the left and right. Therefore, it is possible to easily and easily attach and remove the ladder cord, and it is possible to improve the workability at the time of assembling.

Moreover, the insertion end formed on the upper end of the ladder cord is fixed to the shaft end of the operation drum, and the two cords are wound on the winding surface formed in the shaft center of the operation drum. Since the winding positions are different from each other, it is possible to reliably prevent them from overlapping each other during the operation, and the hanging dimensions of the two cords with respect to the operation drum are equal to each other on the left and right, so that the operation drum is rotated. Corresponding to the above, it is possible to appropriately variably adjust the light shielding angle of the slat that constitutes the blind, and obtain good operability.

(G) Embodiment of the Invention One embodiment of the invention will be described in detail below with reference to the drawings.

The drawing shows the attachment structure of the ladder cord for adjusting the light shielding angle of the blind, and in FIG.
The aluminum-made head box 2 having a cross-section is installed on the upper portion of the window frame or the like (not shown), and the rotary shaft 3 axially supported inside the head box 2 is rotated forward and backward by manual operation. The two cords 5a, 5 constituting the ladder cord 5 on the winding surface 4a of the operation drum 4 fixed on the top.
The upper end portion of a is alternately wound or unwound to variably adjust the light-shielding angle of each of the slats 6 mounted on the lower surface of the head box 2.

Inside the above-mentioned head box 2, drum cases 7, 7 made of a synthetic resin formed in a box shape are fitted and fixed at predetermined intervals, and as shown in FIG. The operation drums 4, 4 made of synthetic resin, which are formed in a cylindrical shape, are rotatably accommodated and held in the inside of the 7, and as shown in FIG. 1, the operation drums 4, 4 are formed at the axial center portions of the operation drums 4, 4. The metal rotation shaft 3 formed in a hexagonal cross section is inserted into the rectangular insertion holes 4b, 4b in a state capable of transmitting rotational power, and the right end portion of the rotation shaft 3 is provided with a worm mechanism 8 in between. By rotating the connected operation rod 9, the operation drums 4, 4 on the rotation shaft 3 are normally and reversely rotated in the same direction.

It should be noted that case covers 7b and 7b are fitted and fixed on the upper surfaces of the drum cases 7 and 7, respectively.

As shown in FIGS. 1 and 2, the operation drum 4 has a cord insertion portion 10 formed on the outer peripheral surface of the end portion of the operation drum 4, which is fitted and fixed to the upper end portion of the ladder cord 5. Insert and fix the metal fitting 11.

On the outer peripheral surface of the above-mentioned cord insertion portion 10, the two cords 5a, 5a forming the ladder cord 5 are allowed to be inserted, and the fastener 11 fitted and fixed to the upper end portion of the ladder cord 5 is provided. A cord insertion groove 10a of a size that prevents insertion is formed in the axial direction, and the thickness portion of the cord insertion portion 10 corresponding to the end portion of the operation drum 4 communicates with the cord insertion groove 10a and is provided with a stopper 11. A metal fitting insertion groove 10b having a size that allows insertion is formed in the axial direction.

The metal fitting insertion groove 10b is formed so that the metal fitting insertion port 10c side corresponding to the end portion of the operation drum 4 is sized to allow insertion of the stopper metal fitting 11, and the cord pull-out surface corresponding to the winding surface 4a of the operation drum 4 is drawn out. The mouth 10d side is formed in a size that allows the two cords 5a, 5a to be pulled out, and the stopper 11 is brought into contact with the stepped portions 10e, 10e formed in the metal fitting insertion groove 10b to prevent the cord from being pulled out.

The ladder cord 5 has a large number of cords 5b formed in a length corresponding to the lateral width dimension of the slat 6 in the longitudinal direction between the two cords 5a formed in a long dimension. A plurality of slats 6 are mounted on the cords 5b, respectively, one on each of the cords 5b.

The upper ends of the above two cords 5a, 5a are cut or formed to have the same length, and the upper ends of the cords 5a, 5a are overlapped with each other, and the same size position is integrally tightened and fixed by a stopper 11. ing.

As shown in FIG. 4, the above-mentioned ladder cord 5 hangs down from the head box 2 through an opening 7a formed on the lower surface side of the drum case 7, and the two cords hang down from the head box 2 respectively. A large number of slats 6 are installed between the ladder cords 5 and 5.

Similarly to the above, the two raising and lowering cords 12 and 12 which circulate around the guide rollers 14 axially supported inside the drum case 7 and hang down below the head box 2 respectively, are composed of a large number of slats 6 respectively.
Are inserted into the respective through holes 6a formed in ... And fixed to the bottom rail 13 arranged at the bottom.

These lifting cords 12, 12 are inserted into a stopper portion 15 fixed to the right end portion of the head box 2 and pulled out to the outside,
The two lifting cords 12, 12 are held and fixed by the holding roller 16 held by the stopper portion 15.

Assuming that the illustrated embodiment is configured as described above, the operation drum 4, the ladder cord 5 and the mounting method will be described below.

First, as shown in FIG. 1, the upper ends of the two cords 5a, 5a constituting the ladder cord 5 are superposed, and these cords 5a, 5a,
After fixing the same size position of the upper end portion of 5a integrally with the stopper 11, the upper end of the cords 5a, 5a fixed by the stopper 11 is inserted and fixed to the cord insertion portion 10 formed on the operation drum 4. .

That is, the stopper 11 fixed to the upper ends of the two cords 5a, 5a is arranged on the side of the metal cord insertion port 10c of the cord insertion portion 10, and the cord insertion groove 10a formed on the outer peripheral surface of the cord insertion portion 10 is After inserting the two cords 5a, 5a respectively, through, as shown in FIG. 2, insert and fix the stopper 11 arranged on the side of the metal fitting insertion port 10c with the metal fitting insertion groove 10b facing.
The cords 5a, 5a pulled out from the cord outlet 10d are made to circulate on both sides of the winding surface 4a of the operation drum 4, and these cords 5a, 5a
Cross a on the opposite winding surface 4a.

Next, as shown in FIG. 3, the cord inserting groove 10a side formed in the cord inserting portion 10 of the operating drum 4 is turned upside down, and two cords 5a are provided on both sides of the winding surface 4a of the operating drum 4. , 5a are hung evenly on the left and right sides, and as shown in FIG. 4, the operation drum 4 to which the ladder cord 5 is attached is housed and held in the drum case 7, and the opening 7a formed on the lower surface side of the drum case 7 is formed. The rudder cord 5 is hung down through the cord.

The drum case 7 with the ladder cord 5 attached as described above
By assembling the inside of the head box 2, the operation rod 9 is rotated to operate the operation drums 4, 4 fixed on the rotation shaft 3.
When the cord is rotated in the normal and reverse directions, the upper ends of the two cords 5a, 5a forming the ladder cord 5 are alternately wound or rewound on the winding surface 4a of the operating drum 4, and the two cords for the operating drum 4 are wound. Since the hanging dimensions of 5a, 5a are even on the left and right, the light-shielding angle of each slat 6 is variably adjusted corresponding to the turning operation of the operating rod 9.

In this way, the fasteners fixed to the upper end of the ladder cord 5
11 is a cord insertion portion formed on the shaft end portion of the operation drum 4.
The cords 5a, 5a can be suspended and fixed to the operation drum 4 in a uniform length by simply inserting the cords 10 into the metal fitting groove 10b, and the ratter cord 5 can be easily and easily attached and detached. The workability during assembly can be improved.

Moreover, the stopper 11 fitted on the upper end of the ladder cord 5
The fixed position of the cords and the winding position of the two cords 5a, 5a are different from each other, and it is possible to surely prevent the mutual overlapping during the operation, and the cords 5a, 5a for the operating drum 4 are prevented.
Since the hanging dimension of the slat is even on the left and right, the light-shielding angle of each slat 6 can be appropriately variably adjusted according to the turning operation of the operation drum 4, and good operability can be obtained.

Furthermore, since the operation drum 4 is integrally formed of synthetic resin, it is not affected by moisture at all and the rotation function is not impaired. Therefore, the blind 1 is applied to a humid bathroom or a bay window where rain is sprayed. Therefore, the durability of the entire device is improved.

In the correspondence between the configuration of the present invention and the above-described embodiment, the insertion end of the present invention corresponds to the part of the fastener 11 fixed to the upper end of the ladder cord 5 of the embodiment, and so on. Corresponds to the cord insertion groove 10a and the metal fitting insertion groove 10b formed in the cord insertion portion 10, but the present invention is not limited to the configuration of the above-described embodiment.

For example, the rotating shaft 3 provided inside the head box 2 may be rotated by an opening / closing cord (not shown).

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention, FIG. 1 is an exploded perspective view showing how to attach an operating drum and a ladder cord, FIG. 2 is a plan view of the operating drum showing a fixed state of the ladder cord, and FIG. Is a side view of the operation drum showing the hanging state of the ladder cord, FIG. 4 is an enlarged vertical side view of the drum case accommodating and holding the operation drum, and FIG. 5 is a partial cutout of the blind showing the assembled state of the drum case. FIG. 6 is a perspective view showing how to attach a conventional ladder cord. 1 ... Blind, 3 ... Rotating axis 4 ... Operating drum, 5 ... Ladder code 5a ... Cord, 6 ... Slat 10 ... Cord insertion part, 11 ... Fastening metal

Claims (1)

[Scope of utility model registration request] 1. A mounting structure of an operation drum for variably adjusting a light blocking angle of a slat of a blind and a ladder cord, wherein two cords forming the ladder cord are integrated with each other at the same dimensional position of upper ends by a stopper. Attachment structure in which the insertion end is fixed by fixing the insertion end of the ladder cord into the insertion groove formed in the shaft end of the operation drum.