JP6825983B2 - Blind device - Google Patents

Description

The present invention relates to a blind device in which a plurality of slats are supported so as to be tiltable.

Conventionally, the rudder cord is rotated in conjunction with the rotating shaft in the head box fixed to the window frame to make the slats tiltable, and the lifting cord is operated and wound in conjunction with the rotation of the rotating shaft. A horizontal blind device that can raise and lower the bottom rail by performing the above is known (see, for example, Patent Document 1).
In the blind device described in Patent Document 1, the elevating cord is arranged on the front side and the rear side of the slats instead of penetrating the center of the slats in the front-rear direction of the slats. This eliminates the need to make a hole in the slats for the lifting cord to pass through, and prevents light from entering through this hole. The elevating cord arranged on the front side of the slat and the elevating cord arranged on the rear side are hung from different positions in the longitudinal direction of the head box.
Further, the elevating cords arranged on the front side and the rear side of the slats are attached to different elevating drums in the head box.

Japanese Patent No. 5937296

In the blind device described in Patent Document 1, the bottom rail is provided with elevating cords alternately in the front-rear direction in the longitudinal direction thereof, for example, the rear side, the front side, and the rear side. Therefore, the elevating cord winds up the bottom rail with an uneven balance of the center of gravity in the front-rear direction.
Due to the uneven balance of the center of gravity, the horizontal balance of the bottom rail was lost when the bottom rail was wound by the lifting cord, and the slats stacked on the bottom rail sometimes collapsed excessively to the front side. The appearance of the blind device was spoiled by the slats pushing forward.

Therefore, the present invention has been made in view of the above problems, and an object of the present invention is to provide a blind device capable of raising and lowering the bottom rail in a well-balanced manner and preventing the slats from collapsing.

In order to achieve the above object, the blind device according to the present invention includes a plurality of ladder cords hanging from the head portion at predetermined intervals, a bottom rail provided at the lower end of the plurality of ladder cords, and the bottom. A plurality of slats supported by the ladder cord between the rail and the head portion at predetermined intervals, and the bottom rail is hung from the head portion and engaged with the bottom rail to raise and lower the bottom rail. A cord and a take-up drum to which the elevating cord is attached to wind up the elevating cord are provided, and the elevating cord is hung so as to face each other in the front-rear direction of the slat. , Each is mounted on the same take-up drum.

Further, it is preferable that the ends of the elevating cords facing each other are attached to different positions of the take-up drum.

Further, it is preferable that the take-up drum has a slit extending along the longitudinal direction, and the end portion of the elevating cord is locked to the slit.

Further, it is preferable that the take-up drum is provided with a slide member that can move in the axial direction on the outer peripheral surface thereof, and the elevating cord is attached to the slide member.

Further, it is preferable that the elevating cords are hung from a plurality of positions separated from each other, and the take-up drum is provided between the adjacent elevating cords.

Further, the elevating cord includes a front elevating cord hanging on the front side of the slat and a rear elevating cord hanging on the rear side of the slat, and the front elevating cord and the rear elevating cord are one end of each. Is fixed to the bottom rail, and the other end is preferably attached to the take-up drum.

Further, the elevating cord is a single cord, and it is preferable that the elevating cord is bridged over the bottom rail and folded back.

Further, the ladder cord is provided with an insertion ring through which the elevating cord is inserted, and the elevating cord is inserted into the insertion ring except for a part of the insertion ring from at least the head portion. preferable.

Further, it is preferable that the head portion is provided with a rotating member which is rotatable around an axis and the elevating cord is laid on the outer peripheral surface to guide the elevating cord in the hanging direction.

According to the present invention, the bottom rail can be raised and lowered in a well-balanced manner to prevent the slats from collapsing.

It is a figure which shows the whole blind device. It is a figure for demonstrating the structure of a take-up drum. It is an exploded view for demonstrating the structure of a drum base and a drum body. It is sectional drawing which follows the AA line shown in FIG. It is a top view of a slat. It is a figure which shows the elevating cord wound around the take-up drum. It is a figure which shows the attachment state of a winding drum and an elevating cord. It is a figure for demonstrating operation of a blind device. It is a figure which shows the modification of the elevating cord. It is a figure for demonstrating the structure of a ring member. It is a figure which shows the state which the ring member was attached to the drum body. It is the figure which cross-section is taken along the longitudinal direction of the winding drum to which a ring member is attached.

A preferred embodiment of the present invention will be described with reference to the drawings. The embodiment shown below is an example, and various forms can be taken within the scope of the present invention.

<Structure of blind device>
FIG. 1 is a schematic view showing the entire blind device. FIG. 2 is a perspective view for explaining the configuration of the take-up drum. FIG. 3 is an exploded view for explaining the configuration of the take-up drum by extracting only the drum base and the drum body. FIG. 4 is a cross-sectional view taken along the line AA shown in FIG. FIG. 5 is a plan view of the slats. FIG. 6 is a schematic perspective view showing an elevating cord wound around the take-up drum. FIG. 7 is a cross-sectional view showing a mounting state of the take-up drum and the elevating cord.

The blind device 100 is fixed to a window frame or the like to ensure visibility from the room to the outside, hinder the visibility from the outside to the room, and enable light and wind to be taken into the room. It is a cover that prevents light and wind from entering the room.
As shown in FIG. 1, the blind device 100 is provided in the head box (head portion) 1 attached to the window frame via the bracket B, the operation unit 2 for operating the blind device 100, and the head box 1. It is supported between the take-up drum 3, the ladder cord 4 hanging downward from the head box 1, the bottom rail 5 attached to the lower end of the ladder cord 4, and the head box 1 and the bottom rail 5. A plurality of slats 6, 6 ... And an elevating cord 7 for elevating and lowering the bottom rail 5 are provided.
For convenience of explanation, in the drawings, the longitudinal direction of the blind device 100 is described as "L", the height direction is described as "H", the front-rear direction is described as "FR", the front side is described as "F", and the rear side is described as "R". ..

(Head box)
The head box 1 is attached with the blind device 100 erected on the window frame, and is attached to the window frame via the bracket B. An operation unit 2 and a take-up drum 3 are provided inside the head box 1. A ladder cord 4 and an elevating cord 7 are hung from a plurality of locations of the head box 1 at predetermined intervals in the longitudinal direction L.

(Operation unit)
The operation unit 2 is provided at one end of the head box 1 in the longitudinal direction L, and has an operation code 21 hanging from the head box 1 and an operation pulley 22 around which the operation code 21 is wound in the head box 1. And have.
The operation code 21 is an endless cord, and by pulling the operation code 21 up and down, an operation related to tilting the slat 6 and winding up the elevating cord 7 is performed to raise and lower the bottom rail 5.
The operation pulley 22 transmits the power transmitted from the operation cord 21 as a rotational force to the rotation shaft Rs rotatably supported in the head box 1. The rotation shaft Rs is attached so as to penetrate the take-up drum 3 and rotate integrally with the take-up drum 3, and rotates the take-up drum 3 by receiving a force transmitted from the operation unit 2. ..

(Take-up drum)
Two take-up drums 3 are provided in series in the longitudinal direction L in the head box 1 of the blind device 100. The two take-up drums 3 are arranged between the adjacent elevating cords 7. As shown in FIG. 2, the take-up drum 3 has a drum base 31 for attaching to the head box 1 and a drum main body 32 for taking up the elevating cord 7.
One end of the take-up drum 3 is rotatably attached to the drum base 31 via the take-up drum cover 33a and the drum holder 33b, and the other end of the take-up drum 3 is a drum stop mechanism 34 on the drum base 31. It is rotatably attached via.
As shown in FIGS. 3 and 4, the drum base 31 has insertion openings 31a and 31b through which the ladder cord 4 and the elevating cord 7 are inserted. The insertion openings 31a and 31b are formed on one end side in the longitudinal direction L and on the front side F and the rear side R of the drum base 31 in the front-rear direction FR, respectively (the insertion opening 31a on the front side F is shown in FIG. 4). reference.).
Each insertion opening 31a is provided with, for example, a rotating member 31c such as a cylindrical roller rotatably supported via a shaft 31d. The rotating member 31c facilitates the movement of the elevating cord 7 between the inside and the outside of the head box 1. The elevating cord 7 is wound around the drum body 32 through the insertion openings 31a and 31b while being guided by the rotating member 31c, and is fed out from the drum body 32 through the insertion openings 31a and 31b (hanging down). To be done). That is, in the rotating member 31c, the elevating cord 7 is bridged over the outer peripheral surface to guide the elevating cord 7 in the hanging direction.

As shown in FIGS. 2 and 3, the drum body 32 has a cylindrical shape, and the rotation axis Rs is inserted along the axis thereof. A plurality of grooves 32a extending from one end to the other end by a predetermined length are provided on the outer peripheral surface of the drum main body 32 at predetermined intervals in the circumferential direction. For example, four grooves 32a are provided at equal intervals from each other. Most of the groove 32a has a bottom and is formed so as not to penetrate the drum body 32.
When the drum body 32 is attached to the drum base 31, the groove 32a extends from the end opposite to the insertion openings 31a and 31b toward the end on the insertion openings 31a and 31b. Of the plurality of grooves 32a, the two grooves 32a spaced 180 ° from each other in the circumferential direction have slits 32b penetrating the drum body 32 in the thickness direction thereof.
The end of the elevating cord 7 is locked and attached to the slit 32b. The slit 32b is formed in the groove 32a at the end of the drum body 32 opposite to the insertion openings 31a and 31b when the drum body 32 is attached to the drum base 31. The slit 32b extends along the longitudinal direction L by a predetermined length.

As shown in FIG. 3, the drum stop mechanism 34 has a stop drum 34a that rotates integrally with the rotation shaft Rs and is rotatably attached to the drum base 31, a stop drum cap 34b, and a stopper 34c. The stop drum cap 34b is interposed between the stop drum 34a and the other end of the take-up drum 3, and the stopper 34c is centered on a pin 34d having one end protruding from the stop drum cap 34b toward the stop drum 34a. It is worn.
In the drum stop mechanism 34, when the elevating cord 7 fixed to the end of the drum body 32 on the drum stop mechanism 34 side is tense when the slat 6 is lowered, the stopper 34c is engaged with the stop drum 34a and the stop drum cap 34b. The position where the stop drum 34a does not protrude outward in the radial direction is held between the two.

Thus, when the elevating cord 7 is unwound from the take-up drum 3, the bottom rail 5 comes into contact with an obstacle (not shown) and the elevating cord 7 is relaxed, the stopper 34c is engaged with the stop drum 34a and the stop drum cap 34b. It projects outward in the radial direction of the stop drum 34a and comes into contact with the stopper block portion (not shown) of the drum base 31. As a result, the rotation of the stop drum 34a, the stop drum cap 34b, and the drum body 32 is prevented, and the lowering of the bottom rail 5 is stopped.

The take-up drum 3 further has a rudder drum 35 and a rudder clamp 36. The tip of the ladder cord 4 is fixed to the ladder clamp 36, and the ladder clamp 36 is slidably fitted on the ladder drum 35.
A rudder clamp 36 is slidably fitted to the rudder drum 35 in the circumferential direction. The rudder drum 35 is configured to slide in the circumferential direction with a predetermined frictional force with respect to the rudder clamp 36. A rotation shaft Rs is inserted through the ladder drum 35. The ladder drum 35 rotates together with the rotation axis Rs. As the rudder drum 35 rotates, the rudder clamp 36 also rotates by the tilting motion of the slats 6.
Two or more take-up drums 3 may be provided, and specifically, they are provided according to the length of the blind device 100, the number of elevating cords 7, and the like.

(Ladder code)
The ladder cord 4 is hung from the head box 1 at a predetermined interval in the longitudinal direction of the head box 1. For example, the ladder cord 4 hangs down from the head box 1 at the same position as the elevating cord 7 in the longitudinal direction L. Further, the ladder cord 4 may hang from the head box 1 between the two elevating cords 7.
Since the rudder clamp 36 is slidably fitted on the ladder drum 35, the rudder cord 4 whose tip is fixed to the rudder clamp 36 has the rotational force of the rotating shaft Rs due to the operation of the operation code 21. It is transmitted to the drum 35 and tilts in the height direction H.
As shown in FIG. 4, the ladder code 4 has a hanging portion 41b hanging from the head box 1 at the front side F and the rear side R at predetermined intervals in the front-rear direction FR, and a hanging portion of the front side F and the rear side R. It has a connecting portion 41c that connects 41b. The connecting portions 41c are provided in pairs at a slight interval so as to accommodate the slats 6 in the height direction H. At the connection position between the hanging portion 41b and the connecting portion 41c, a loop-shaped insertion portion (insertion ring) 41d through which the elevating cord 7 is inserted is formed.

(Bottom rail)
As shown in FIG. 1, the bottom rail 5 is attached to the lower end of the ladder cord 4 and the elevating cord 7, and the slats 6 and 6 arranged on the upper side of the bottom rail 5 when the elevating cord 7 is wound up. ... is piled up.
As shown in FIG. 4, the bottom rail 5 has a cover 51 for fixing the elevating cord 7 on the lower surface 5a of the bottom rail 5. Further, the bottom rail 5 has an opening 5b in which the other end of the elevating cord 7, which will be described later, is inserted into the lower surface 5a.

(Slat)
The slat 6 is a thin plate-shaped member, and is held by the ladder cord 4 in a state of being vertically extended at a predetermined interval between the connecting portions 41c of the ladder cord 4 and extending in the horizontal direction. A plurality of slats 6 are provided between the head box 1 and the bottom rail 5, and the front edge and the trailing edge in the front-rear direction FR are located on the upper side and the lower side in the vertical direction, respectively, by the operation of the operation unit 2. It can be rotated and tilted.
As shown in FIG. 5, the slats 6 have notches 61 recessed in the front-rear direction FR at the front and rear edges at positions where the ladder cord 4 and the elevating cord 7 hang down in the longitudinal direction L. The connecting portion 41c of the ladder cord 4 is engaged with the notch 61.

(Elevating cord)
As shown in FIG. 1, the elevating cord 7 is hung from the head box 1 at two positions at predetermined intervals along the longitudinal direction L of the blind device 100.
As shown in FIGS. 4 and 5, at each hanging position in the head box 1, the elevating cord 7 has two separate front elevating cords 71 and a rear R elevating cord 76 in the present embodiment. Have. One end of the front elevating cord 71 is attached to the drum main body 32 in the head box 1, and the other end is fixed to the bottom rail 5 by hanging the front side F of the slat 6 from the insertion opening 31a of the front side F.
One end of the rear elevating cord 76 is attached to the drum body 32 in the head box 1, and the other end is attached to the bottom rail 5 by hanging the rear R of the slat 6 from the insertion opening 31b of the rear R. ing.

As shown in FIGS. 6 and 7, the front elevating cord 71 and the rear elevating cord 76 are guided by the rotating member 31c at the insertion opening 31a on the front side F and the insertion opening 31b on the rear side R, respectively, to guide the drum body. It is wrapped around the outer circumference of 32. One end of each of the front elevating cord 71 and the rear elevating cord 76 is locked to the slit 32b of the drum body 32.
As shown in FIG. 4, the other ends of the front elevating cord 71 and the rear elevating cord 76 are sandwiched by the cover 51 in a state of being inserted into the opening 5b formed in the lower surface 5a of the bottom rail 5. It is fixed as.

In the present embodiment, the elevating cord 7 is hung from two places, but may be hung from three or more places depending on the length of the blind device 100, and the winding cord 7 is wound accordingly. The number of tori drums 3 installed is also changed.
Further, the mounting position of the elevating cord 7 on the drum body 32 does not have to be 180 ° away, and can be arbitrarily set as long as it is a different position on the drum body 32. For example, at a position 90 ° away. Alternatively, it may be installed in the same position.

[Arrangement of each configuration]
Next, the arrangement of each configuration in the blind device 100 will be described.
As shown in FIG. 1, two take-up drums 3 are arranged in series in the head box 1 along the longitudinal direction L of the blind device 100. The two take-up drums 3 and 3 are arranged so that the slits 32b of the drum main body 32 face each other. That is, the take-up drums 3 and 3 are arranged between the ladder cord 4 and the elevating cord 7 hanging from two places. In the embodiment, the elevating cord 7 hangs from both ends of the head box 1 in the longitudinal direction L.
Further, the front elevating cord 71 hangs down from the insertion opening 31a on the front side F, and the rear elevating cord 76 hangs down from the insertion opening 31b on the rear side R.
By arranging the take-up drum 3 between the two elevating cords 7, only the operation portion 2 can be arranged between the ladder cord 4 and the end of the slat 6. Compared to the configuration in which the take-up drum 3 is arranged in addition to the operation unit 2 between the ladder cord 4 and the end of the slats 6, the blind device 100 has the ladder cord 4 and the elevating cord 7 to the end of the slats 6. Since the distance between the two can be shortened, it is possible to prevent the end portion of the slat 6 from hanging down.

In the head box 1, the front elevating cord 71 and the rear elevating cord 76 are attached to the drum body 32 at positions separated by 180 °. By separating the mounting positions of the front lifting cord 71 and the rear lifting cord 76 from each other, it is possible to prevent the cords 71 and 76 from being entangled with each other when the winding drum 3 winds the cords 71 and 76.

The front elevating cord 71 and the rear elevating cord 76 hanging from the same position in the longitudinal direction L are arranged at positions facing each other in the front-rear direction FR of the slat 6, and the drum body 32 of the same take-up drum 3 It is attached to.
Therefore, it is not necessary to separately prepare the take-up drum 3 for the front elevating cord 71 and the take-up drum 3 for the rear elevating cord 76. Thus, since the blind device 100 having a narrow width in the front-rear direction FR can be configured and the number of parts can be suppressed, in the blind device 100, it is possible to achieve an orderly arrangement of parts in the head box 1. it can.

Further, as shown in FIG. 4, the front elevating cord 71 and the rear elevating cord 76 are inserted into the insertion portion 41d from the head box 1 except for a part of the insertion portion 41d of the ladder cord 4.
If the front elevating cord 71 and the rear elevating cord 76 are inserted through all the insertion portions 41d of the ladder cord 4, even if the slats 6, 6 ... Are in the tilted state, a part of the head box 1 is used. The ladder code 4 is in a state of being hooked on the front elevating cord 71 and the rear elevating cord 76. That is, the ladder code 4 does not move in the vertical direction, and the slats 6, 6 ... Are opened. As a result, a gap is formed between the slats 6, 6 ..., And the function as the blind device 100 cannot be fully exhibited.
For example, referring to FIG. 8B, when a part of the insertion portion 41d on the upper side of the ladder code 4 is hooked on the front elevating cord 71 and the rear elevating cord 76, the ladder code 4 is the front elevating cord 71. It can be seen that the space between the door and the rear lift cord 76 is opened.

On the other hand, in the blind device 100, the front elevating cord 71 and the rear elevating cord 76 do not pass through a part of the insertion portion 41d of the upper ladder cord 4 in the height direction H in the front-rear direction FR. Thus, all slats 6 can be tilted.
It should be noted that "excluding a part of the insertion portion 41d" is assumed to be a range in which, for example, the latest 3 to 10 slats 6 are supported from the head box 1. However, depending on the configuration of the blind device 100, the range in which the elevating cord 7 is not inserted through the insertion portion 41d can be appropriately changed.

Although not shown, the ladder code 4 may be hung between the two elevating cords 7 shown in FIG. In this case, in the head box 1, only the rudder drum 35 and the rudder clamp 36 need be provided between the take-up drums 3 and 3.

[Operation of blind device]
Next, the operation of the blind device 100 will be described with reference to FIG.
8A and 8B are views for explaining the operation of the blind device 100, FIG. 8A is a diagram showing a horizontal state of the slats, and FIG. 8B is a diagram showing a tilted state of the slats. is there.
First, by pulling the loop-shaped operation code 21, the operation pulley 22 around which the operation code 21 is wound rotates. The rotational force of the operation pulley 22 is transmitted to the rotary shaft Rs via a gear (not shown) and converted into a force for rotating the rotary shaft Rs.

As the rotation axis Rs rotates, the ladder drum 35 and the ladder clamp 36 to which the ladder code 4 is fixed rotate, and the ladder code 4 has one of the front side F and the rear side R of the front-rear direction FR on the upper side. It moves and the other moves downward and tilts (changes from the state shown in FIG. 8 (a) to the state shown in FIG. 8 (b)).
When the operation code 21 is further pulled, the ladder clamp 36 idles on the ladder drum 35, and the drum body 32 starts to rotate without tilting the slats 6. As the drum body 32 rotates, the front elevating cord 71 and the rear elevating cord 76 are wound around the drum body 32, and the bottom rail 5 begins to rise.

In the blind device 100, the bottom rail 5 rises from the front side R and the rear side F in a state of being sandwiched between the front side elevating cord 71 and the rear side elevating cord 76, respectively, and thus gradually stacks on the bottom rail 5 as it rises. It is possible to surely prevent the slats being struck from losing their posture.
Thus, even if the bottom rail 5 is tilted when ascending and descending, it is possible to prevent the bottom rail 5 from tilting and collapsing the slats 6, 6 ... In the front-rear direction FR when the bottom rail 5 is raised and lowered. Therefore, the appearance of the blind device 100 during the ascending / descending operation is not impaired.

Further, since the rotating members 31c are provided in the insertion openings 31a and 31b of the head box 1, the front elevating cord 71 and the rear elevating cord 76 are used when the drum body 32 is wound with the rotation of the rotating member 31c. The top is smoothly wound up. Further, since the front elevating cord 71 and the rear elevating cord 76 are not in contact with the edges of the insertion openings 31a and 31b, damage due to contact with the head box 1 can be avoided.

As described above, according to the blind device 100, since the elevating cords 7 are arranged in front of and behind the slats 6, the bottom rail 5 is not wound up with an uneven balance at the time of winding, and the bottom rail 5 is in that posture. Can rise straight while maintaining. As a result, the balance of the bottom rail 5 is not lost and the bottom rail 5 is not tilted, and the appearance can be improved. Further, the slats 6 stacked on the upper surface of the bottom rail 5 do not collapse in one of the front and rear directions with the inclination of the bottom rail 5, and the appearance at the time of winding can be improved.
Further, since the elevating cords 7 arranged before and after the slats 6 can be wound up by the same winding drum 3, four elevating cords 7 can be wound up by the two winding drums 3. As a result, the two take-up drums 3 can prevent the bottom rail 5 from tilting, and it can be used for a narrow type blind device. Further, since the front and rear elevating cords 7 can be wound simultaneously by one winding drum 3, the time required for winding can be shortened, and the number of parts of the blind device 100 can be reduced.

Further, since one end of the elevating cord 7 is attached to the bottom rail 5, the elevating cord 7 does not slip on the surface of the bottom rail 5, and the operating resistance during operation can be reduced.
Further, since the two take-up drums 3 are arranged between the adjacent elevating cords 7, the ladder cord 4 is compared with the case where the take-up drum 3 is arranged outside the elevating cord 7 and the ladder cord 4. It is possible to shorten the distance from the slat 6 to the end portion of the slat 6, and it is possible to suppress bending due to the weight of the end portion due to the lengthening of the slat 6.
Further, since the weight of the bottom rail 5 and the slats 6 acts on the elevating cord 7 by half, the load acting on the elevating cord 7 is reduced as compared with the conventional case, and the operability is improved. Further, it is possible to suppress the lifting of the bottom rail 5 caused by the load acting on the elevating cord 7.

<Modification example>
The present invention is not limited to the above-described embodiment, and can be appropriately modified without exceeding the scope of the present invention.
For example, as shown in FIG. 9, the elevating cord may be composed of a single cord. FIG. 9 is a diagram showing a modified example of the elevating cord.
The configuration of the elevating cord 7A will be described below. For convenience of explanation, the configuration will be described along the extending direction from one end to the other end of the elevating cord 7A.

The elevating cord 7A is formed of a single cord, has two ends, and both ends are attached to and locked to the slit 32b of the drum body 32.
With one end of the elevating cord 7 attached to the drum body 32, the other end is hung from the head box 1 through, for example, the insertion opening 31a on the front side F. The elevating cord 7 is inserted through the insertion portion 41d of the ladder cord 4 except for a part thereof, and the extending direction is changed from the lower side to the upper side so as to straddle the bottom rail 5 along the lower surface 5a.
On the lower surface 5a, the elevating cord 7 is inserted in the space formed between the bottom rail 5 and the cover 51.
The other end of the elevating cord 7A extends upward along the ladder cord 4, enters the head box 1 through the insertion opening 31b on the rear side R, is wound around the drum body 32, and is wound around the slit 32b. Locked to.
Even when the elevating cord 7A is used, at least the same action and effect as those of the above-described embodiment can be obtained. Further, by forming the elevating cord 7A with a single cord, the work load of attaching the elevating cord 7A to the take-up drum 3 can be reduced.

Further, as shown in FIGS. 10 to 12, the take-up drum 3 may have a ring member (slide member) 8 that can slide and move on the drum body 32.
10A and 10B are views for explaining the configuration of the ring member, FIG. 10A is a plan view of the ring member, and FIG. 10B is a perspective view of the ring member. FIG. 11 is a perspective view showing a state in which the ring member is attached to the drum body. FIG. 12 is a cross-sectional view of the take-up drum to which the ring member is attached along the longitudinal direction.

As shown in FIGS. 10A and 10B, the ring member 8 has two flange-shaped stepped portions 81 protruding radially outward from the outer peripheral surface. Slits 81a having a predetermined interval in the circumferential direction are formed between the two step portions 81. The slit 81a extends along the axis x of the ring member 8, and the width of the slit 81a extends along the axis x.
Each step 81 extends the outer peripheral surface of the ring member 8 over approximately 180 °. At a position where the two step portions 81 face each other, a housing portion 82 for attaching the end portions of the elevating cords 7 and 7A is formed.

Each accommodating portion 82 is formed by a pair of side walls 82a extending outward in the radial direction and facing each other in the circumferential direction, a peripheral wall 82b extending from each of the side walls 82a in the circumferential direction, and a stepped portion 81. It has a bottom wall 82c. The accommodation space 83 for accommodating the elevating cords 7 and 7A in the accommodating portion 82 is defined by the side wall 82a, the peripheral wall 82b, and the bottom wall 82c.
A slit 82d extending radially outward is formed in the bottom wall 82c, and the slit 82d is continuous with the slit 81a. The slit 82d has a circular opening on the inside in the radial direction.

Further, a recess 81b is formed on the outer peripheral surface of the ring member 8 facing the slit 81a along the axis x of the ring member 8. When the elevating cords 7 and 7A are attached to the accommodating portion 82, the elevating cords 7 and 7A are accommodated in the recess 81b.

The ring member 8 has four protrusions 84, 85 extending in the axial direction while projecting inward in the radial direction on the inner peripheral surface. Of the four protrusions, the protrusion 84 formed on the inner peripheral surface at the same position as the accommodating portion 82 is formed to have a wider width in the circumferential direction than the protrusion 85 formed between the protrusions 84. The four protrusions 84 and 85 are arranged at equal intervals from each other.

As shown in FIG. 11, the ring member 8 is attached to the drum body 32 by fitting the protrusions 84 and 85 into the groove 32a of the drum body 32. The ring member 8 is movable in the longitudinal direction L on the drum body 32. The grooves 32a of the drum body 32 may be formed to have dimensions that match the protrusions 84 and 85, respectively. That is, the circumferential dimension of the groove 32a that engages with the protrusion 84 is larger than the circumferential dimension of the groove 32a that engages with the protrusion 85.

As shown in FIG. 12, by providing the ring member 8, the elevating cords 7 and 7A can be attached to the take-up drum 3 by inserting the end portions of the elevating cords 7 and 7A into the accommodating portions 82 via the slits 81a and 82d. Since it is only necessary to put it in the drum and lock it, it can be easily performed without removing the drum main body 32 from the drum base 31 as compared with the configuration in which it is directly attached to the drum main body 32.

1 Head box 2 Operation unit 3 Winding drum 31 Drum base 31b Insertion opening (opening)
31c Rotating member 32 Drum body 32a Groove 32b Slit 4 Ladder cord 41a, 41b Hanging part 41c Connecting part 41d Inserting part (inserting ring)
5 Bottom rail 5a Bottom surface 51 Cover 6 Slat 7 Lifting cord 71 Front lifting cord 76 Rear lifting cord 8 Ring member (slide member)
x-axis 100 blind device

Claims (9)

Multiple ladder cords hanging from the head at predetermined intervals,
A bottom rail provided at the lower end of the plurality of ladder cords and
A plurality of slats supported by the ladder cord at predetermined intervals between the bottom rail and the head portion, and
An elevating cord that hangs down from the head portion and is engaged with the bottom rail to raise and lower the bottom rail.
A take-up drum to which the elevating cord is attached and to wind the elevating cord is provided.
A blind device characterized in that the elevating cords are hung so as to face each other in the front-rear direction of the slats, and the elevating cords facing each other are attached to the same take-up drum. The blind device according to claim 1, wherein the ends of the elevating cords facing each other are attached to different positions of the take-up drum. The take-up drum has a slit extending along the longitudinal direction.
The blind device according to claim 1 or 2, wherein an end portion of the elevating cord is locked to the slit. The take-up drum is provided with a slide member that can move in the axial direction on the outer peripheral surface thereof.
The blind device according to claim 1 or 2, wherein the elevating cord is attached to the slide member. The elevating cords are hung from a plurality of positions separated from each other.
The blind device according to any one of claims 1 to 4, wherein the take-up drum is provided between adjacent elevating cords. The elevating cord includes a front elevating cord hanging on the front side of the slat and a rear elevating cord hanging on the rear side of the slat, and the front elevating cord and the rear elevating cord have one end thereof. The blind device according to any one of claims 1 to 5, wherein the blind device is fixed to a bottom rail and the other end is attached to the take-up drum. The blind device according to any one of claims 1 to 6, wherein the elevating cord is a single cord, which is bridged over the bottom rail and folded back. The ladder cord is provided with an insertion ring through which the elevating cord is inserted.
The blind device according to any one of claims 1 to 7, wherein the elevating cord is inserted through the insertion ring except for a part of the insertion ring from the head portion. The head portion is any of claims 1 to 8, wherein the head portion is rotatable around an axis, and the elevating cord is laid on an outer peripheral surface to include a rotating member for guiding the elevating cord in a hanging direction. The blind device according to one item.

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