WO2022050325A1

WO2022050325A1 - Blind

Info

Publication number: WO2022050325A1
Application number: PCT/JP2021/032207
Authority: WO
Inventors: 和哉堀内; 公利阿久津; 匡芳横山; 理恵長谷川; 裕遠藤
Original assignee: 株式会社ニチベイ
Priority date: 2020-09-03
Filing date: 2021-09-01
Publication date: 2022-03-10

Abstract

This blind is characterized by comprising: a raising/lowering drum 24 which is rotatably accommodated in a head box 2 and in which a raising/lowering cord 61 for moving a slat 4 up and down is connected in a windable and unwindable manner; a rotary drum 242 which is rotatably accommodated in the head box 2 and rotates the slat 4; and a second drive shaft 232 which is connected to the rotary drum 242 in an integrally rotatable manner and can be rotationally operated by an operation unit, wherein the second drive shaft 232 is disposed so that at least a part thereof passes directly below the raising/lowering drum 241.

Description

blind

This embodiment relates to a blind having a shielding material.

Conventionally, as this type of blind, the one shown in Patent Document 1 below is known. The blind shown in Patent Document 1 has a rotating shaft rotatably supported by a head box, and the rotating shaft is coaxially fitted and rotates in conjunction with the rotating shaft, while one end thereof penetrates a slats and becomes a bottom rail. A first take-up drum that locks the other end of the locked elevating cord and winds the elevating cord, a second take-up drum that coaxially fits the rotation shaft and rotates in conjunction with the rotation shaft, and one end is the first It is provided with a drawer cord that is locked to the take-up drum of 2 and wound around the second take-up drum, while the other end of which penetrates the head box and hangs out of the head box. This drawer cord is connected to a tilting shaft that tilts the slats in the head box via a gear, penetrates through a hollow operating rod capable of rotationally driving the tilting shaft, and is derived from the lower end.

According to such a blind, when the drawer cord derived from the lower end of the operation rod is pulled down, the second take-up drum rotates and the rotation axis is interlocked, and the first take-up drum winds the elevating cord. The slats can be raised. Further, when the operation rod is rotated, the tilting shaft is rotated via the gear, and the slats can be tilted.

Japanese Unexamined Patent Publication No. 08-232559

However, according to the blind described in Patent Document 1 described above, the tilting shaft arranged below the elevating drum is located closer to the front of the head box, whereby the rotation of the gear is directly meshed with the tilting shaft. Although the rotation can be transmitted, there is a problem that the width in the front-rear direction of the head box becomes large because the tilting drum is arranged so as to protrude in front of the elevating drum.

The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a technique capable of making the width of the headbox in the front-rear direction compact.

In order to solve the above-mentioned problems, one aspect of the present invention includes an elevating drum that is rotatably housed in a head box and an elevating cord for elevating and moving the shielding material is rotatably connected to the elevating drum. A rotary drum rotatably housed in the head box and rotating the shielding material, and a drive shaft rotatably connected to the rotary drum and rotatably operated by an operation unit are provided, and the drive shaft is provided. Is characterized in that at least a part thereof is arranged so as to pass directly under the elevating drum.

According to the present invention, the width in the front-rear direction of the head box can be made compact.

It is a front view which shows the blind which concerns on 1st Embodiment. It is a vertical sectional view which shows the internal structure of a headbox. It is a perspective view which shows the internal structure of a head box. FIG. 2 is a cross-sectional view taken along the line AA shown in FIG. It is a sectional view corresponding to the line AA in the vicinity of the elevating drum located in the center. It is a vertical sectional view which shows the internal structure of an operation unit. FIG. 2 is a cross-sectional view taken along the line BB shown in FIG. FIG. 2 is a cross-sectional view taken along the line CC shown in FIG. FIG. 3 is a cross-sectional equivalent view taken along the line CC in a state where an operation code is drawn. FIG. 2 is a sectional view taken along line DD shown in FIG. It is a cross-sectional correspondence diagram of the DD line in the state where the operation code is drawn. FIG. 2 is a cross-sectional view taken along the line EE shown in FIG. It is the EE line cross-sectional correspondence figure in the state which pulled the operation code. It is a side view which shows the state which the slat is located at the lower limit in the blind which concerns on 1st Embodiment. It is a side view which shows the state which the operation code was pulled and the slats were raised in the blind which concerns on 1st Embodiment. It is a side view which shows the state which took the hand away from the operation code in the blind which concerns on 1st Embodiment. It is a side view which shows the state which the slats are tilted by rotating the operation member in the blind which concerns on 1st Embodiment. It is a BB line cross-sectional correspondence figure in the blind which concerns on the 1st modification. It is a vertical cross-sectional view of the vicinity of the elevating drum in the blind which concerns on the 2nd modification. FIG. 19 is a cross-sectional view taken along the line FF shown in FIG. It is a perspective view which shows the internal structure of the brake mechanism which concerns on 2nd Embodiment. It is an exploded perspective view which shows the internal structure of the brake mechanism which concerns on 2nd Embodiment. It is a side sectional view which shows the brake mechanism in the non-deceleration state which concerns on 2nd Embodiment. It is a side sectional view which shows the brake mechanism in the deceleration state which concerns on 2nd Embodiment. It is a side sectional view which shows the brake mechanism in the non-deceleration state which concerns on 3rd Embodiment. It is a side sectional view which shows the brake mechanism in the deceleration state which concerns on 3rd Embodiment.

<First Embodiment>
Hereinafter, embodiments according to the present invention will be described with reference to the drawings. In the present embodiment, the case where the present invention is applied to a horizontal blind provided with slats as a shielding material will be described as an example. In the present embodiment, the indoor side surface when the blind is provided is referred to as a front surface, the outdoor side surface is referred to as a back surface, the direction consisting of the front surface and the back surface is referred to as a front-rear direction, and the longitudinal direction of the blind is referred to as a left-right direction. This will be explained below. Further, in the present specification and the drawings, components having substantially the same function are designated by the same reference numerals, so that duplicate description will be omitted.

(overall structure)
First, the overall configuration of the blind according to the present embodiment will be described. FIG. 1 is a front view showing a blind according to the present embodiment. It should be noted that this figure shows a blind in which the bottom rail is lowered to the lowest position and the slats are horizontal, that is, in a fully open state. Further, in FIG. 1, only the head box is shown inside.

As shown in FIG. 1, the blind 1 according to the present embodiment includes a head box 2, an operation unit 3 provided in the head box 2, a plurality of slats 4, and a bottom rail 5.

The head box 2 is fixed to a window frame or the like via a plurality of brackets 21, and head box caps 22 are detachably provided on both side surfaces. In the headbox 2, a first drive shaft 231 and a second drive shaft 232, three elevating drums 241 and three rotating drums 242 (see FIG. 2) (not shown here), and a first drive shaft 231 are included. A brake device 250 for decelerating the rotation and a stopper device 260 for restraining the rotation of the first drive shaft 231 are provided.

The operation unit 3 is provided on the right side in the drawing in the head box 2 and engages with one end of the operation member 36 hanging from the head box 2. When the operating member 36 is operated by the operator, the operating unit 3 rotationally drives the first drive shaft 231 and the second drive shaft 232.

The slats 4 are supported by a ladder cord 62 so as to be arranged in a plurality in the vertical direction between the head box 2 and the bottom rail 5. One end of the ladder cord 62 is connected to the rotary drum 242 and hangs down from the head box 2, and the other end is connected to the bottom rail 5 and arranged in front of and behind the slat 4 so as to sandwich the slat 4 individually. I support it. Therefore, according to the rotation of the rotating drum 242, the front and rear ladder cords 62 are tilted by relative movement along the vertical direction, and the slats 4 are fully closed, horizontally (fully open), anti-fully closed, or the like. Rotate.

The bottom rail 5 is suspended and supported so as to be located at the lowermost end of the blind 1 by connecting to the other end of the elevating cord 61 having one end connected to the elevating drum 241 so that it can be wound and unwound. Therefore, the elevating cord 61 is wound and unwound by the elevating drum 241 to move up and down, and the elevating movement causes the plurality of slats 4 to move up and down.

Next, the configuration of each drive shaft and each drum described above will be described with reference to FIGS. 2 to 5. FIG. 2 is a vertical sectional view showing the internal structure of the head box, and FIG. 3 is a perspective view thereof. FIG. 4 is a cross-sectional view taken along the line AA shown in FIG. 2, and FIG. 5 is a cross-sectional view corresponding to the line AA near the elevating drum located in the center.

As shown in FIGS. 2 and 3, the elevating drum 241 is rotatably accommodated with respect to the elevating drum receiver 243 provided in the head box 2, and the first drive shaft 231 penetrates the elevating drum 241. It is rotatably connected to the first drive shaft 231. The elevating drum receiver 243 is provided with a cord retainer 244 so that the elevating cord 61 hangs down from below the cord retainer 244. The above configuration is the same for the three elevating drums 241. However, as shown in FIG. 1, the elevating drum 241 on the left side in the figure is different from the other two elevating drums 241 due to the accommodation space in the head box 2. Are arranged in the opposite direction, and the winding direction of the elevating cord 61 is also opposite.

One end of the first drive shaft 231 reaches the operation unit 3 and is integrally rotatably connected to the interlocking member 324 described later. As a result, the three elevating drums 241 rotate in the same direction via the first drive shaft 231 according to the rotation of the interlocking member 324. In this embodiment, as shown in FIG. 4, the elevating drum 241 is connected to the first drive shaft 231 via the input drum 245.

The rotary drum 242 is rotatably accommodated in the rotary drum receiver 246 assembled to the elevating drum receiver 243, and can be integrally rotated with the second drive shaft 232 by penetrating the second drive shaft 232. It is connected. One end of the second drive shaft 232 reaches the operation unit 3 and is integrally rotatably connected to the output gear 341. The output gear 341 transmits the driving force to the second drive shaft 232 when the operator rotates the operating member 36, and the second drive shaft 232 rotates according to the driving force and rotates in the same direction. The three rotating drums 242 will rotate.

As shown in FIGS. 3 and 4, in the present embodiment, the second drive shaft 232 is arranged so as to pass directly under the elevating drum 241. More specifically, the first drive shaft 231 and the second drive shaft The second drive shaft 232 is arranged vertically below the first drive shaft 231 so that the position in the front-rear direction is the same as that of the 232, whereby the rotary drum 242 is located directly below the elevating drum 241. Further, since the rotary drum 242 is formed to have a smaller diameter than the elevating drum 241, the diameter range L2 of the rotary drum 242 in the front-rear direction shown in FIG. 4 is the diameter range of the elevating drum 241 in the same direction. It is located in L1.

With this configuration, the rotary drum 242 can be arranged within the range of the elevating drum 241 in the front-rear direction of the head box 2, and a part or all of the rotary drum 242 is located outside the range. In comparison, the width of the head box 2 in the front-rear direction can be reduced.

As shown in FIG. 4, the elevating cord 61 hanging in the vicinity of the operation unit 3, that is, from the elevating drum 241 at the right end in FIG. It abuts on the rear roller 247 rotatably provided inside and extends in the vertical direction without being substantially bent. This also applies to the elevating drum 241 at the left end in FIG. For the sake of explanation, these elevating drums will also be referred to as a first elevating drum 241. On the other hand, as shown in FIG. 5, the elevating cord 61 hanging from the elevating drum 241 in the center of FIG. 1 is distributed so as to straddle the rotating drum 242 from the rear side in the front-rear direction to the front side in the front-rear direction and rotates. It abuts on the front roller 248 rotatably provided in the rotary drum receiver 246 so as to pass in front of the drum 242, is slightly bent, and then extends in the vertical direction. For the sake of explanation, this elevating drum will also be referred to as a second elevating drum 241.

With this configuration, since a plurality of slats 4 are sandwiched between the elevating cords 61 in the front-rear direction, stable elevating operation can be realized, and the elevating cord 61 hanging from the first elevating drum 241 is substantially abbreviated. Since it hangs down from the rear of the head box 2 without bending, it is possible to suppress the generation of a load. Further, although the elevating cord 61 hanging from the second elevating drum 241 bends more than the elevating cord 61 hanging from the first elevating drum 241, the bending resistance can be suppressed and distributed. Therefore, the load on the elevating cord 61 can be reduced. Further, since the elevating cord 61 of the second elevating drum 241 is distributed so as to straddle the lower rotating drum 242, the elevating cord 61 can be distributed in front of the rotating drum 242 without interfering with the rotating drum 242. ..

In the present embodiment, the second elevating drum 241 is arranged between the two first elevating drums 241. Naturally, the first elevating drum 241 is arranged between the two second elevating drums 241. May be good.

(Configuration of operation unit 3)
Next, the configuration of the above-mentioned operation unit 3 will be described with reference to FIGS. 1 to 3 and FIGS. 6 to 9. FIG. 6 is a vertical sectional view showing the internal structure of the operation unit, and FIG. 7 is a sectional view taken along line BB shown in FIG. FIG. 8 is a sectional view taken along the line CC shown in FIG. 2, and FIG. 9 is a sectional view corresponding to the sectional view taken along the line CC in a state where an operation code is drawn. Note that, in FIG. 6, for the sake of explanation, the operation code 361 is not shown, and a cross section seen from the left side surface is shown.

The operation unit 3 moves the slat 4 up and down together with the bottom rail 5 by pulling down the operation code 361. For example, when lowering the bottom rail 5, the cord stopper 362 (see FIG. 1) to which the operation code 361 is connected is lightly pulled down to maintain a constant speed and lower the slat 4 together with the bottom rail 5 to the lowest position. Can be made to. Further, when raising the bottom rail 5 that has descended to the lowest lowered position, by lowering the cord stopper 362, the slats 4 can be raised together with the bottom rail 5 by the amount of the lowered portion. When the cord stopper 362 is released in that state, only the operation cord 361 is wound while maintaining the stopped state of the bottom rail 5, and the bottom rail 5 can be raised again by pulling it down again after the winding.

As shown in FIGS. 2 and 3, the operation unit 3 is a first drive shaft including a pulley 321 in the main body cases 31a to 31c, a gear spring 322 as a biasing member, an adapter 323, an interlocking member 324, and the like. A clutch mechanism for rotating 231 in only one direction and a tilting mechanism for rotationally driving the second drive shaft 232, which is composed of an output gear 341 and an intermediate gear 342, are built in, and one end of the operating member 36 is intermediate. The gear 342 is rotatably engaged.

First, various configurations related to the operation code 361 and configurations of the tilting mechanism will be described.

As shown in FIGS. 6 and 7, the pulley 321 is pivotally supported by a fixed shaft 311 of the main body case 31a so as to be relatively rotatable, and the operation code 361 of the operating member 36 is connected so as to be windable and unwindable. ing. As shown in FIGS. 8 and 9, one end of the mainspring 322 is connected to the pulley 321 and the other end is connected to the fixed shaft 311 in the winding direction in which the operation code 361 is wound. The urging force is constantly applied to the pulley 321. As a result, when the operator pulls down the operation code 361, the operation code 361 is unwound from the pulley 321 and the pulley 321 rotates as shown in FIG. 9, and the diameter of the mainspring 322 is reduced according to the rotation. Become.

As shown in FIG. 7, the operation cord 361 is formed in a string shape, one end thereof is connected to the pulley 321 and the other end hangs down from the pulley 321 and is inserted into the operation member 36 to be the cord. It is connected to a stop 362 (see FIGS. 1 and 14). Although the operation code 361 is urged in the winding direction, the cord stopper 362 abuts on the lower end of the hollow operation rod 363 of the operation member 36, so that further winding of the operation code 361 is prevented. The lower part of the operating rod 363 has been expanded in diameter to serve as a gripping portion for gripping the operating member 36 when the operator operates it, and the cord stopper 362 comes into contact with the lower end of the gripping portion. On the other hand, when the cord stopper 362 is pulled down from the operation rod 363 and then released, the operation cord 361 is wound by the mainspring 322, and the cord stopper 362 and the operation rod 363 are in contact with each other again.

As shown in FIGS. 6 and 7, the operation rod 363 of the operation member 36 is integrally rotatably connected to the upper end portion of the operation rod 36 via the joint portion 364 with the tilter input shaft 365. The tilter input shaft 365 is rotatably supported in the head box 2, and an input gear 366, which is a so-called worm foil, is provided at an upper end portion thereof. The input gear 366 meshes with an intermediate gear 342 which is a so-called worm gear rotatably supported in the

main body cases

31a and 31b. The intermediate gear 342 is located below and in front of the axis (second drive shaft 232) of the output gear 341 whose axis is also a worm gear, and meshes with the output gear 341 to apply a rotational force to the output gear 341. It is possible to transmit. Therefore, the rotation of the operation rod 363 is transmitted to the joint portion 364, the tilter input shaft 365, and the input gear 366, and the driving force thereof is transmitted to the second drive shaft 232 via the intermediate gear 342 and the output gear 341.

An insertion hole 367 through which the operation code 361 is inserted is provided in the tilter input shaft 365, and an introduction port 368 for introducing the operation code 361 into the insertion hole 367 is formed at the upper end thereof. The introduction port 368 faces and communicates with the opening formed by the main body case 31a and the main body case 31b, and the operation code 361 that has passed through the opening and the introduction port 368 is introduced into the insertion hole 367. .. In the present embodiment, the tilter input shaft 365 is arranged so that the introduction port 368, specifically, the width W in the front-rear direction thereof is located in the vertical direction at the hanging position from the pulley 321 of the operation code 361.

According to the above configuration, the operation code 361 hangs down from the pulley 321 and the proximity portion 361a close to the pulley 321 extends in the substantially vertical direction and is introduced into the introduction port 368. As a result, when the cord stop 362 is pulled down, the direction in which the operation code 361 is pulled out from the pulley 321 and the direction in which the operation code 361 hangs down from the pulley 321 substantially coincide with each other, so that the load on the operation code 361 is reduced as compared with the conventional case. can do. This also applies when the operation code 361 is wound around the pulley 321. Further, since the introduction port 368 is located in the vertical direction at the hanging position of the operation code 361, the operation code 361 can be guided in the substantially vertical direction only by distributing the operation code 361 toward the introduction port 368. Further, in order to extend the operation code 361 substantially in the vertical direction and introduce it into the introduction port 368, the tilter input shaft 365 is brought closer to the pulley 321 in the front-rear direction, so that the protrusion amount of the tilter input shaft 365 in front of the headbox 2 Can be made smaller and the design can be improved.

Further, in the present embodiment, since the second drive shaft 232 is arranged directly under the elevating drum 241, when the input gear 366 of the tilter input shaft 365 is directly meshed with the output gear 341, the introduction port 368 is in the hanging position in the operation code 361. Since it cannot be positioned in the vertical direction, it becomes difficult to extend the operation code 361 substantially in the vertical direction and introduce it into the introduction port 368, which in turn increases the bending resistance of the operation code 361 in the operation member 36. Will be. However, by interposing the intermediate gear 342 between the input gear 366 and the output gear 341 and positioning the axis of the intermediate gear 342 below the second drive shaft 232, the input gear 366 is placed in the hanging position together with the introduction port 368. Can be positioned in the vertical direction of. As a result, the operation code 361 can be easily extended in the vertical direction and introduced into the introduction port 368, and the bending resistance of the operation code 361 in the operation member 36 can be reduced.

On the inner wall surface of the main body case 31a above the introduction port 368, a guide surface 312 formed on a curved surface is formed in order to adjust the introduction angle of the operation code 361 to the introduction port 368. As shown in FIG. 7, the guide surface 312 is curved so as to have continuity with the inner peripheral surface of the insertion hole 367, whereby the operation code 361 comes into contact with the guide surface 312 and the cord becomes unnecessary. It can be inserted into the insertion hole 367 without bending.

Further, it is preferable that the tilter input shaft 365 is tilted at an inclination angle X of 35 ° or less with respect to the vertical direction so that the lower end is located in front of the upper end in the front-rear direction. This makes it possible to reduce the bending angle of the operation code 361 that passes through the joint portion 364 and is introduced into the operation rod 363. The tilt angle X is more preferably tilted within an angle range of 15 ° to 25 °, considering the space occupied by the output gear 341 and the intermediate gear 342 and the interference between the tilter input shaft 365 and the slat 4. It is particularly preferable to incline at the angle of. It is preferable that these angles are appropriately set according to the width of the slat 4, and for example, the above angles may be applied to slat widths of 25 mm to 35 mm.

Next, the configuration of the clutch mechanism will be described. FIG. 10 is a sectional view taken along line DD shown in FIG. 2, and FIG. 11 is a sectional view corresponding to the sectional view taken along line DD in a state where an operation code is drawn. FIG. 12 is a sectional view taken along line EE shown in FIG. 2, and FIG. 13 is a sectional view corresponding to the sectional view taken along line EE in a state where an operation code is drawn.

As shown in FIGS. 12 and 13, the operation unit 3 includes a relay shaft 325, a clutch drum 326, and a clutch pin in addition to the pulley 321, the mainspring 322, the adapter 323, and the interlocking member 324 described above as the clutch mechanism. It includes a 327, a guide washer 328, and a cam drive 329.

As shown in FIG. 10, the adapter 323 is formed on a substantially disk, and the protrusion 321a of the pulley 321 is fitted in the central portion thereof, and is integrally rotatably connected to the pulley 321. One end of the relay shaft 325 fits into the fixed shaft 311 as shown in FIG. 7, and the other end fits into the hollow portion of the clutch drum 326 as shown in FIG. 12 to support the relay shaft 325 so that it cannot rotate relative to each other. There is. The clutch drum 326 has a hollow cylindrical shape, and a clutch spring 330 is fitted to the peripheral wall thereof. The clutch pin 327 has a columnar shape, and moves back and forth along the radial direction to transmit / do not transmit the rotation of the pulley 321 to the interlocking member 324.

The guide washer 328 has a hollow disk shape, and the clutch drum 326 penetrates the hollow portion thereof, and is supported so as to be relatively rotatable. Further, as shown in FIG. 12, the guide washer 328 has three sets of protrusions 328a for guiding the advance / retreat operation of the clutch pin 327 and two sets of protrusions 328b for integrally rotating with the cam drive 329 on one surface. ing.

As shown in FIG. 12, the cam drive 329 has a hollow disk shape, and the clutch drum 326 penetrates through the hollow portion and is supported so as to be relatively rotatable. The cam drive 329 has a protrusion 329b having a cam surface on which a protrusion 323a of the adapter 323 is inserted and integrally rotatably engaged with the pulley 321 and a cam surface for moving the clutch pin 327 forward and backward on one surface, and a protrusion of the guide washer 328. A protrusion 329c that can come into contact with the 328b is provided. The cam drive 329 can rotate relative to each other with the guide washer 328, but the relative rotation is restricted when the protrusion 328b and the protrusion 329c come into contact with each other. As shown in FIGS. 2 and 3, the interlocking member 324 has a first drive shaft 231 fitted in the main body case 31c so as to be relatively non-rotatable, and can be engaged with the clutch pin 327 as shown in FIG. Is provided with an engaging portion 324a projecting inward in diameter.

(Slat raising and lowering operation by the clutch mechanism)
The operation of the operation unit 3 configured as described above will be described. First, with reference to FIGS. 14 to 16, the raising and lowering operation of the slat 4 by the clutch mechanism when the operation code 361 is pulled will be briefly described. FIG. 14 is a side view showing a state in which the slats are located at the lower limit in the blind according to the present embodiment. FIG. 15 is a side view showing a state in which the operation code is pulled and the slats are raised. FIG. 16 is a side view showing a state in which the hand is released from the operation code.

As shown in FIG. 14, when the bottom rail 5 has already been lowered to the lowest lowered position, the clutch pin 327 is not engaged with the engaging portion 324a of the interlocking member 324 as shown in FIG. It has become. As shown in FIG. 15, when the operator pulls down the cord stopper 362 of the operating member 36, the operating cord 361 is unwound and the pulley 321 rotates. Subsequently, the pulley 321 begins to rotate integrally with the cam drive 329 via the adapter 323, and the clutch pin 327 is pushed up in the out-of-diameter direction by the cam surface of the protrusion 329b to engage with the engaging portion 324a of the interlocking member 324. At the time of the engagement, the protrusion 328b and the protrusion 329c are in contact with each other, and the state shown in FIG. 13 is obtained. As a result, the rotation of the pulley 321 is transmitted to the first drive shaft 231 via the interlocking member 324, and these rotate integrally. The bottom rail 5 can be raised as shown in FIG. 15 by the elevating drum 241 winding up the elevating cord 61 in response to the rotation of the first drive shaft 231.

When the operator stops the pulling operation of the cord stopper 362, the first drive shaft 231 tries to rotate in the downward direction by the weight of the bottom rail 5, but the stopper device 260 (see FIG. 1) operates and stops the rotation. .. When the hand is released while the cord stopper 362 is pulled, the pulley 321 is rotated in the opposite direction by the urging force of the mainspring 322, and the operation cord 361 is wound up. At this time, the clutch pin 327 is no longer pushed up by the protrusion 329b of the cam drive 329, but the clutch pin 327 rotates in the opposite direction together with the cam drive 329 while being sandwiched between the protrusions 328a of the guide washer 328, and is stopped by the stopper device 260. It is pushed down by the engaging portion 324a of the interlocking member 324 to be disengaged. By disengaging the engagement, the pulley 321 and the interlocking member 324 can rotate relative to each other, and only the pulley 321 rotates in the opposite direction. Therefore, the reverse rotation is not transmitted to the first drive shaft 231 and the position of the raised bottom rail 5 does not change.

As a result, the first drive shaft 231 is stopped by the stopper device 260, the operation cord 361 is wound around the pulley 321 and the cord stopper 362 abuts on the lower end of the operation rod 363 to be in the state shown in FIG. The operator can raise the slat 4 together with the bottom rail 5 to the highest raised position by repeating such an operation of pulling down the cord stopper 362 of the operating member 36 a plurality of times. On the other hand, in order to lower the raised slat 4 and the bottom rail 5, when the operator pulls the cord stopper 362 and releases the hand while the operation cord 361 is slightly pulled out, the stopper device is passed through the first drive shaft 231. The stop of 260 is released, and the slats 4 and the bottom rail 5 are lowered by their own weight. At this time, the slat 4 and the bottom rail 5 are decelerated and lowered by their own weight due to the action of the brake device 250 that decelerates the rotation of the first drive shaft 231.

(Tilting motion of slats by tilting mechanism)
Next, with reference to FIG. 17, the tilting operation of the slats 4 by the tilting mechanism when the operation code 361 is pulled will be briefly described. FIG. 17 is a side view showing a state in which the slats are tilted by rotating the operating member.

As shown in FIG. 17, when the operation rod 363 of the operation member 36 is rotated in one direction, the joint portion 364, the tilter input shaft 365, and the input gear 366 rotate at the same rotation amount to the input gear 366. The driving force is transmitted to the meshing intermediate gear 342. The driving force is transmitted to the output gear 341 via the intermediate gear 342, and the second drive shaft 232 connected to the gear is rotated. The rotating drum 242 rotates in response to the rotation of the second drive shaft 232, and the slats 4 are tilted (rotated) by winding the ladder cord 62. On the other hand, when the operation rod 363 is rotated in the opposite direction, the second drive shaft 232 is rotated in the opposite direction to the above, and the slats 4 are tilted in the opposite direction.

According to the present embodiment described above, since the second drive shaft 232 is located directly below the elevating drum 241, the rotary drum 242 can be positioned below the elevating drum 241 and has a width in the front-rear direction of the head box 2. Can be made compact.

Further, according to the present embodiment, since the proximity portion 361a of the operation code 361 hanging from the pulley 321 close to the pulley 321 can be extended in a substantially vertical direction and introduced into the operation member 36, the operation code 361 can be introduced. It is possible to reduce the load applied to the operation code 361 during winding and unwinding.

<First modification>
FIG. 18 is a cross-sectional equivalent view taken along the line BB in the blind according to the first modification of the present embodiment. As shown in FIG. 18, it is preferable to provide a roller 312a that can rotate relative to the guide surface 312. By providing the roller 312a on the guide surface 312, the contact distance (sliding distance) of the operation code 361 with respect to the guide surface 312 can be reduced, and the roller 312a rotates when the cord slides on the guide surface 312. The load on 361 can be further reduced.

<Second modification>
FIG. 19 is a vertical sectional view of the vicinity of the elevating drum in the blind according to the second modification of the present embodiment, and FIG. 20 is a sectional view taken along line FF shown in FIG. As shown in FIG. 19, the rotary drum 242 is provided in a state of being offset to the right side in the figure in the axial direction (left-right direction) as compared with the rotary drum 242 shown in FIG. It is supported by a drum receiver 243 so as to be relatively rotatable.

By moving the rotary drum 242 in the left-right direction with respect to the elevating drum 241 in this way, it is possible to avoid interference between the elevating cord 61 and the rotary drum 242. Therefore, the degree of freedom in arranging the elevating cord 61 can be increased. For example, as shown in FIG. 20, the elevating cord 61 is inserted into the insertion hole 41 provided in the center of the slats 4 in the front-rear direction. You can also. In this case, as compared with the form in which the plurality of elevating cords 61 are hung from the front and the rear of the slat 4, it is not necessary to provide the front and

rear rollers

247 and 248, and the elevating cords are distributed from one side in the front-rear direction to the other side. The bending of the cord 61 can be made gentle, and the load on the cord can be reduced.

Although it has been explained here that one end of the rotary drum 242 is supported by the elevating drum receiver 243 so as to be relatively rotatable, it may be supported by the rotary drum receiver 246. Further, the rotary drum 242 may be offset to the left side in the figure.

<Second embodiment>
In the blind according to the present embodiment, the rotation of the pulley 321 is decelerated by the brake mechanism 370. The configuration and operation of the brake mechanism according to this embodiment will be described. 21 and 22 are a perspective view and an exploded perspective view showing the internal structure of the brake mechanism, respectively. 23 and 24 are side sectional views showing the brake mechanism in the non-deceleration state and the deceleration state, respectively. Note that FIG. 21 shows a state in which a part of the main body case is cut off.

As shown in FIGS. 21 and 22, the brake mechanism 370 includes a rotor 371 and two brake portions 372. The rotor 371 is provided so as to be rotatable integrally with the pulley 321 and is formed so as to project in the left-right direction with respect to the pulley 321, that is, in one of the rotation axis directions of the pulley 321 and over a predetermined distance in the rotation axis direction. Further, the rotor 371 is provided with two support portions 371a protruding in the radial direction orthogonal to the rotation axis direction, and each of the support portions 371a is formed at a neck portion extending in the radial direction and the tip of the neck portion. Has an orthogonal head. The head is formed so as to be substantially circular when viewed from the direction of the rotation axis, and the diameter of the head is larger than the thickness of the neck. The rotor 371 is integrally formed with the pulley 321 so that the number of parts of the operation unit 3 can be reduced and the durability can be improved.

The brake portion 372 is a member that extends by a predetermined distance in the rotation direction of the rotor 371, that is, in the circumferential direction, and is formed to have a length shorter than the length in the rotation axis direction of the rotor 371. A groove matching the shape of the support portion 371a is formed on the inner diameter side of the brake portion 372. However, the groove of the brake portion 372 is formed so that a slight gap is formed between the neck portion and the wall surface of the groove when the brake portion 372 is assembled to the support portion 371a. Further, the groove of the brake portion 372 is formed at a position biased toward the winding direction side in the rotation direction of the pulley 321.

The main body case 31b is formed with a cylindrical portion 313 that accommodates at least a part of the brake mechanism 370 so as to cover from the outer diameter direction, and slides on the inner peripheral surface of the cylindrical portion 313 on the outer diameter side of the brake portion 372. A brake tip 373 that can be contacted is provided. The brake tip 373 is preferably formed of a material having a relatively large coefficient of friction, and examples of such a material include elastic materials such as thermoplastic elastomers and synthetic rubber.

As shown in FIG. 23, when the pulley 321 is rotated in the unwinding direction, the brake portion 372 does not operate, whereas the pulley 321 is rotated in the winding direction, that is, in the urging direction by the spring 322. In this case, as shown in FIG. 24, the free end portion of the brake portion 372 swings outward so as to be centered on the support point of the support portion 371a. As a result, the brake tip 373 abuts on the inner peripheral surface of the cylindrical portion 313, the rotation of the pulley 321 due to the urging force is decelerated, and the operation code 361 is wound up on the pulley 321 in the decelerated state, and eventually the operation is performed. The jumping of the cord 361 and the cord stopper 362 is suppressed.

According to such a brake mechanism 370, since the brake mechanism 370 is offset in the rotation axis direction with respect to the pulley 321 as compared with the case where the brake mechanism 370 is housed in the inner circumference of the pulley 321, the pulley 321 The diameter of the head box 2 can be reduced, and the size of the head box 2 in the vertical direction and the front-rear direction can be reduced.

<Third embodiment>
The configuration of the blind according to the third embodiment will be described. 25 and 26 are side sectional views showing a brake mechanism in a non-deceleration state and a deceleration state according to the present embodiment, respectively.

As shown in FIGS. 25 and 26, in the blind according to the present embodiment, the operation unit 3 is provided with the brake mechanism 380 instead of the brake mechanism 370, and the space in which the brake mechanism 380 is housed can be filled with liquid. It differs from the first embodiment in that the main body case 31b is formed so as to be hermetically sealed.

The brake mechanism 380 is provided so as to be housed in a space filled with oil O, and has a rotor 381 and two brake portions 382. The rotor 381 extends in the rotation axis direction of the pulley 321 and is formed in a columnar shape, and is integrally formed with the pulley 321. The brake portion 382 is provided so as to project in the radial direction perpendicular to the rotation axis direction of the pulley 321 so that the first surface is formed on the unwinding direction side in the rotation direction and the winding direction side in the rotation direction, that is, A second surface is formed on the urging direction side by the mainspring 322.

The first surface is formed so that the resistance to the oil O becomes relatively small when rotated in the unwinding direction, and the second surface has a relatively large resistance to the oil O when rotated in the winding direction. Is formed in. In the present embodiment, the first surface is formed as an inclined curved surface inclined so that the inward diameter side protrudes toward the unwinding direction with respect to the rotation direction, and the second surface is formed as a plane orthogonal to the rotation direction. To.

According to such a brake mechanism 380, as shown in FIGS. 25 and 26, when the pulley 321 is rotated in the unwinding direction, the braking force is applied because the resistance of the oil O in the brake portion 382 is relatively small. On the other hand, when the pulley 321 is rotated in the winding direction, a braking force is generated in the brake portion 382 because the resistance of the oil is relatively large, and the rotation of the pulley 321 is decelerated.

Further, according to the brake mechanism 380, the rotation of the pulley 321 can be decelerated without contacting the constituent members with each other, so that the noise at the time of deceleration can be reduced. The space in which the brake mechanism 380 is housed may be filled with a fluid other than oil O.

The present invention can be implemented in various other forms without departing from its gist or main features. Therefore, the above embodiments are merely exemplary in all respects and should not be construed in a limited way. The scope of the present invention is shown by the scope of claims and is not bound by the text of the specification. Moreover, all modifications, various improvements, substitutions and modifications that fall within the equivalent scope of the claims are all within the scope of the present invention.

1 Blind 2 Headbox 4 Slat (shielding material)
232 Second drive shaft (drive shaft)
241 Elevating drum 242 Rotating drums 31a to 31c Main body case (case)
312 Guidance surface (guidance surface)
312a Roller 321 Pulley 342 Intermediate gear 36 Operation member (operation unit)
361 Operation code 363 Operation rod (operation unit)
364 Joint member 365 Chiller input shaft (operation unit)
366 Input gear 367 Insertion hole 368 Inlet port 370,380 Brake mechanism 61 Lifting cord

Claims

An elevating drum that is rotatably housed in the headbox and has an elevating cord that is rotatably connected so that the elevating cord for elevating and moving the shielding material can be wound and unwound.
A rotating drum that is rotatably housed in the headbox and rotates the shielding material,
It is provided with a drive shaft that is integrally rotatably connected to the rotary drum and can be rotated by an operation unit.
A blind characterized in that the drive shaft is arranged so that at least a part thereof passes directly under the elevating drum.
The rotating drum is arranged below the elevating drum.
A plurality of the elevating drum and the rotating drum are provided over the extending direction of the head box.
Of the plurality of elevating drums, the elevating cord hanging from the first elevating drum hangs from the rear side of the head box so as to pass behind the rotating drum located below the drum, and the second elevating drum. The blind according to claim 1, wherein the elevating cord hung from the head box hangs from the front side of the head box so as to pass in front of the rotating drum located below the drum.
The elevating cord hanging from the first elevating drum or the elevating cord hanging from the second elevating drum is distributed so as to straddle the rotating drum from one side in the front-rear direction to the other side in the front-rear direction, and the head box. The blind according to claim 2, wherein the blind hangs from the other side in the front-rear direction.
The operation code is connected so as to be windable and unwindable, and the lifting drum is further provided with a pulley that can rotate the elevating drum by operating the operation code.
One of claims 1 to 3, wherein the operation code hangs down from the pulley and a portion close to the pulley extends in a substantially vertical direction and is introduced into the operation unit. Blinds described in the section.
It is further provided with an intermediate gear that is rotatably supported in the head box and that transmits the rotation of the operation unit to the drive shaft by engaging with an input gear formed in the operation unit.
The blind according to any one of claims 1 to 4, wherein the axis of the intermediate gear is located below the axis of the drive shaft.
A pulley in which the operation cord included in the operation unit is connected so as to be windable and unwindable, and the rotational force can be transmitted to the drive shaft by being rotated by the operation of the operation cord.
An urging member that urges the pulley with a rotational force on the winding direction side, which is the rotational direction for winding the operation cord.
13. The blind described in any one of the items.
The brake mechanism is supported by a rotor formed so as to project in the rotation axis direction with respect to the pulley and rotate integrally with the pulley, and a support portion provided on the rotor, and the support portion is used as a fulcrum. It has a brake portion formed so as to be swingable in the out-of-diameter direction of the pulley by a rotational force on the winding direction side.
The blind according to claim 6, wherein the brake portion swings so as to be slidable with a wall portion accommodating the brake mechanism.
The brake mechanism includes a rotor formed so as to project in the rotation axis direction with respect to the pulley and rotate integrally with the pulley, and a brake portion formed so as to project in the out-of-diameter direction with respect to the rotor. Have,
The accommodation space accommodating the brake mechanism is filled with fluid, and the accommodation space is filled.
In the brake portion, the resistance of the fluid when the pulley is rotated to the winding direction side is higher than the resistance of the fluid when the pulley is rotated to the unwinding side which is the rotation direction in which the pulley unwinds the operation cord. The blind according to claim 6, wherein the blind is formed so as to be large.
The blind according to claim 7 or 8, wherein the rotor is integrally formed with the pulley.