JP5214167B2 - Lifting cord winding device for solar shading device - Google Patents

Description

  The present invention relates to a lifting / lowering cord winding device for a solar radiation shielding device such as a pleated screen, a scooping curtain, and a horizontal blind.

  The pleated screen suspends and supports a screen that can be bent in a zigzag shape in the vertical direction, and adjusts the amount of light appropriately by moving the screen up and down with an operating device.

  As one type of such a pleated screen, the winding pipe is rotatably supported in the head box, and the winding pipe is rotated by the operating device to wind the lifting cord or to rewind the screen. There is something that was made. The winding pipe is formed so that the diameter gradually decreases toward one side, and the elevating cord is spirally wound around the winding pipe.

Patent Document 1 discloses a winding device in which a suspension string of a blind is wound around a winding drum in a spiral shape.
Patent Document 2 discloses a horizontal blind slat lifting device in which a lifting / lowering cord is spirally wound around a winding pipe via an obstacle detection / stop device.
Japanese Patent No. 3249617 Japanese Patent No. 3288641

  In the winding device described in Patent Document 1, the hanging string is guided to the winding drum via a guide attached to the head box. Therefore, when the winding is started from the state where the hanging strap is almost rewound, the hanging strap is guided in an oblique direction from the guide toward the winding drum, so that the friction between the hanging strap and the guide increases. There is a problem that the operation force required for the winding operation increases.

  In the slat lifting device described in Patent Document 2, the lifting cord wound around the winding pipe is lowered through the guide hole of the slide stopper that constitutes the obstacle detection stop device and the guide roller provided in the head box. Drooped. Therefore, when starting the winding operation from the state where the lifting / lowering cord is substantially rewound, the lifting / lowering cord is pulled obliquely from the guide hole toward the leading end side of the winding pipe, so that the friction between the lifting / lowering cord and the guide hole is reduced. There is a problem that the operating force increases.

  An object of the present invention is to provide a lifting / lowering cord winding device that can smoothly guide a lifting / lowering cord to a winding pipe in a lifting / lowering cord winding device that spirally winds a lifting / lowering cord around a winding pipe. It is in.

In Claim 1, the lifting / lowering cord is suspended and supported from a winding pipe that is rotatably supported in the head box, the solar radiation shielding material is suspended and supported from the head box, and the lower and upper portions of the solar radiation shielding material support the lifting / lowering cord. Attach the lower end of the cord, rotate the winding pipe to wind or unwind the lifting cord so that the solar shading material can be raised and lowered, and the winding pipe has a diameter from the base end side to the tip end side. The upper end of the lifting / lowering cord is attached to the distal end of the winding pipe, and the lifting / lowering cord wound on the proximal end side of the winding pipe is sequentially moved to the distal end side in a spiral shape. In the lifting / lowering cord winding device of the solar shading device that is wound, the lifting / lowering cord is positioned on the proximal side of the winding pipe from the outside of the head box in a state of being substantially rewound from the winding pipe. The guide rollers via obliquely guided directly the winding pipe that, the guide roller immovably and rotatably supports the, and the rotation shaft of the guide roller positioned parallel to the axis of rotation of the winding pipe .

According to a second aspect of the present invention, the lifting / lowering cord is suspended and supported from a winding pipe that is rotatably supported in the head box, the solar radiation shielding material is suspended from the head box, and the lower / lower portion of the solar radiation shielding material supports the lifting / lowering cord. Attach the lower end of the cord, rotate the winding pipe to wind or unwind the lifting cord so that the solar shading material can be raised and lowered, and the winding pipe has a diameter from the base end side to the tip end side. The upper end of the lifting / lowering cord is attached to the distal end of the winding pipe, and the lifting / lowering cord wound on the proximal end side of the winding pipe is sequentially moved to the distal end side in a spiral shape. In the lifting cord winding device of the solar shading device that is wound up,
The hoisting cord is guided directly from the outside of the head box to the winding pipe via a guide roller located on the proximal end side of the winding pipe in a state of being substantially rewound from the winding pipe, and the guide roller is The movable shaft is supported so as to be immovable and rotatable, and the rotation shaft of the guide roller is supported with respect to the lifting / lowering cord guided from the front end side of the winding pipe to the guiding roller in a state where the lifting / lowering cord is substantially unwound from the winding pipe. The directions were orthogonal to each other and supported obliquely with respect to the rotation axis of the winding pipe .
According to a third aspect of the present invention, the winding pipe is rotatably supported by a support member, and the guide roller is rotatably supported by the support member below the winding pipe.

In Claim 4 , the said guide roller was located behind the rotating shaft center of the said winding pipe.
According to a fifth aspect of the present invention, the winding pipe is provided with an obstacle detection stop device that detects the relative rotation with the drive shaft and prevents the winding pipe from rotating.

  According to the present invention, in the lifting / lowering cord winding device in which the lifting / lowering cord is spirally wound around the winding pipe, the lifting / lowering cord winding device capable of smoothly guiding the lifting / lowering cord to the winding pipe is provided. Can do.

(First embodiment)
Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In the pleated screen shown in FIGS. 1 to 3, a screen (sunlight shielding material) 2 is suspended and supported from a head box 1, and a bottom rail 3 is attached to the lower end of the screen 2.

  The screen 2 has a plurality of folds in the vertical direction, and joining pieces 4 are formed on every other fold of the fabric that can be folded in a zigzag shape. The joining piece 4 is formed by joining a crease that protrudes toward the back side of the screen 2 with a predetermined width. The joining method may be ultrasonic welding that is discontinuous in the width direction of the fabric, sewing, or adhesion with an adhesive. Moreover, it can replace with the said joining piece 4 and can also use the joining tape provided with the ring member and hole different from material | dough.

Elevating cords 5 are inserted into the respective joining pieces 4 of the screen 2, and a plurality of the elevating cords 5 are inserted at equal intervals in the left-right width direction of the screen 2.
An upper end portion of the lifting / lowering cord 5 is supported by a lifting / lowering cord winding device 6 provided in the head box 1, and the lifting / lowering cord winding is operated by operating an operation chain 7 that is suspended from one end portion of the head box 1. The lifting / lowering cord 5 can be wound or rewound by the take-up device 6.

  The lower end of the lifting / lowering cord 5 is attached to the bottom rail 3. And when the lifting / lowering cord 5 is wound up by the lifting / lowering cord winding device 6, the bottom rail 3 is pulled up, the screen 2 is folded upward, and when the lifting / lowering cord 5 is rewound from the lifting / lowering cord winding device 6, The bottom rail 3 is lowered and the screen 2 is extended downward.

  A pitch holding cord 8 is suspended from the head box 1 in the vicinity of the lifting cord 5, and a lower end of the pitch holding cord 8 is attached to the bottom rail 3. When the screen 2 is stretched, the pitch holding cord 8 holds the joining pieces 4 every other stage in the screen 2 in the height direction and holds the crease intervals of the screen 2 to be constant.

  Next, a specific configuration of the lifting / lowering cord winding device 6 will be described. At the hanging position of the lifting / lowering cord 5, a support member 9 is attached in the head box 1, and both ends of the take-up pipe 10 are rotatably supported by the support member 9. As shown in FIGS. 5 and 6, the take-up pipe 10 is formed in a cylindrical shape whose diameter becomes narrower from the proximal end side toward the distal end side.

  As shown in FIG. 4, the lifting / lowering cord 5 is suspended at a position offset backward from the central portion in the front-rear direction of the head box 1. As shown in FIGS. 6 and 7, a guide roller 11 is rotatably supported in a direction parallel to the take-up pipe 10 at a position behind the center of the take-up pipe 10 above the bottom of the support member 9. Yes. Further, below the guide roller 11, a guide hole 12 for the lifting / lowering cord 5 is formed on the bottom side of the support member 9.

  The upper end of the lifting / lowering cord 5 is fixed to the distal end of the winding pipe 10, circulates around the outer peripheral surface of the winding pipe 10, and then guide rollers 11 and guide holes 12 positioned on the proximal end side of the winding pipe 10. After that, the head box 1 is suspended downward.

The lifting / lowering cord 5 is guided from the guide roller 11 to the front side of the winding pipe 10 and wound around the outer peripheral surface of the winding pipe 10.
A drive shaft 13 is rotatably supported in the head box 1, and the drive shaft 13 is rotated by operating the operation chain 7. The drive shaft 13 passes through the winding pipe 10, and the rotation of the driving shaft 13 is transmitted to the winding pipe 10.

  When the drive shaft 13 is rotated in the winding direction of the lifting / lowering cord 5 by operating the operation chain 7, the winding pipe 10 is rotated in the same direction, and the lifting / lowering cord 5 is wound around the winding pipe 10.

  Further, when the drive shaft 13 is rotated in the rewinding direction of the lifting / lowering cord 5, the winding pipe 10 is allowed to rotate in the same direction, and the winding pipe 10 rotates based on the load of the bottom rail 3. Then, the lifting / lowering cord 5 is unwound from the winding pipe 10.

  A clutch pawl 15 that is movable in the axial direction of the take-up pipe 10 is formed at the base end of the take-up pipe 10, and an engagement protrusion 16 is formed on the support member 9 at a position facing the clutch pawl 15. Is formed.

  Further, between the drive shaft 13 and the take-up pipe 10, the drive shaft is in a state in which no load in the rewinding direction of the lifting / lowering cord 5 acts on the take-up pipe 10, that is, in a state in which the take-up pipe 10 does not rotate. A cam mechanism (not shown) is provided for moving the clutch pawl 15 toward the engagement protrusion 16 when the motor 13 is rotated in the rewinding cord rewinding direction.

  Therefore, when the load of the bottom rail 3 is not acting on the winding pipe 10 via the lifting / lowering cord 5, the clutch pawl 15 is engaged when the drive shaft 13 is relatively rotated in the rewinding direction of the lifting / lowering cord 5. Engagement with the protrusion 16 prevents the winding pipe 10 from rotating.

  With such a configuration, an obstacle detection and stop device is configured to prevent the winding pipe 10 from rotating in the rewinding cord rewinding direction when the bottom rail 3 cannot be lowered due to some obstacle.

  Next, the operation of the lifting / lowering cord winding device 6 configured as described above will be described. FIG. 8 shows the lifting / lowering cord winding device 6 when the lifting / lowering cord 5 is unwound from the winding pipe 10 and the bottom rail 3 is lowered to the lower limit. In this state, the lifting / lowering cord 5 is almost unwound from the winding pipe 10, and the lifting / lowering cord 5 is guided obliquely upward from the guide roller 11 toward the distal end side of the winding pipe 10.

  When the winding pipe 10 is rotated in the winding direction of the lifting / lowering cord 5 from this state, the lifting / lowering cord 5 is wound around the winding pipe 10 via the guide roller 11 and, as shown in FIG. The lifting / lowering cord 5 wound around the base end side of 10 sequentially moves toward the distal end side.

  When the lifting / lowering cord 5 is rewound from the winding pipe 10, as shown in FIG. 10, the lifting / lowering cord 5 is guided below the head box 1 via the guide roller 11, and when the bottom rail 3 reaches the lower limit, The lifting / lowering cord 5 is guided obliquely downward from the leading end side of the winding pipe 10 toward the guide roller 11, and is guided downward via the guide roller 11.

In the lifting cord winding device for the pleat screen as described above, the following operational effects can be obtained.
(1) When the lifting / lowering cord 5 is wound around the winding pipe 10 from the state where the lifting / lowering cord 5 is almost unwound from the winding pipe 10, it is guided obliquely from the guide hole 12 toward the distal end side of the winding pipe 10. Is done. However, it is possible to smoothly guide the lifting / lowering cord 5 to the distal end side of the winding pipe 10 by the guide roller 11 and reduce friction between the lifting / lowering cord 5 and the guide hole 12. Accordingly, it is possible to reduce the operating force for winding up the lifting / lowering cord 5 at the start of lifting the bottom rail 3.
(2) When the lifting / lowering cord 5 is unwound from the winding pipe 10 and the bottom rail 3 is lowered to the lower limit, the lifting / lowering cord 5 is smoothly moved from the front end side of the winding pipe 10 to the lower side of the head box 1 via the guide roller 11. Can be guided to. Therefore, the bottom rail 3 can be lowered by its own weight stably to the lower limit.
(3) Even if the diameter of the winding pipe 10 is reduced, the lifting / lowering cord 5 can be smoothly guided to the distal end side of the winding pipe 10 at the start of winding of the lifting / lowering cord 5. Further, at the position near the lower limit of the bottom rail 3, the lifting / lowering cord 5 can be smoothly guided from the front end side of the winding pipe 10 to the lower side of the head box 1 via the guide roller 11. Therefore, the diameter of the winding pipe 10 can be reduced, and the head box 1 can be reduced in size.
(4) The guide roller 11 is positioned behind the center of the winding pipe 10, and the lifting / lowering cord 5 is guided from the front side of the winding pipe 10 to the lower side of the head box 1 through the guide roller 11. The lifting / lowering cord 5 that hangs backward from the center of the winding pipe 10 can be smoothly guided to the winding pipe 10 via the guide roller 11.
(5) The configuration for detecting the obstacle in the obstacle detection / stopping device is not a configuration for detecting the tension by inserting the lifting / lowering cord into the guide hole, but the relative rotation between the drive shaft 13 and the winding pipe 10. Is detected to prevent the winding pipe 10 from rotating. Therefore, since the obstacle detection stop device and the lifting / lowering cord 5 are not in contact with each other, the operation force is not increased when the winding operation is started from the state where the lifting / lowering cord 5 is substantially rewound.
(Second embodiment)
11 and 12 show a second embodiment. The same components as those in the first embodiment will be described with the same reference numerals.

  In this embodiment, when the shaft center of the guide roller 14 and the shaft center of the winding pipe 10 are twisted, the shaft of the guide roller 14 is started when the bottom rail 3 starts to be pulled up or when the bottom rail 3 is lowered to the lower limit. The core and the lifting / lowering cord 5 are orthogonal to each other.

In this embodiment, the winding direction of the lifting / lowering cord 5 with respect to the winding pipe 10 is opposite to that in the first embodiment.
With such a configuration, when the bottom rail 3 starts to be pulled up, the lifting / lowering cord 5 can be guided more smoothly from the guide hole 12 to the leading end side of the take-up pipe 10 than in the first embodiment.

Further, when the bottom rail 3 is lowered to the lower limit, the lifting / lowering cord 5 can be more smoothly guided from the distal end side of the winding pipe 10 to the guide hole 12.
You may implement the said embodiment in the following aspects.
・ In addition to pleated screens, it can also be used for lifting cord winding devices for hoisting curtains and horizontal blinds.
-Although the guide rollers 11 and 14 were provided in the position offset backward from the downward direction of the rotating shaft center of the winding pipe 10, you may position them below the center of a winding pipe.
The take-up pipe may have the same diameter from the distal end side to the intermediate portion, and may have a shape that increases in a trumpet shape from the intermediate portion to the proximal end portion. Moreover, it is good also for the display which a diameter becomes large gradually toward a base end part.

It is a front view which shows a pleat screen. It is a side view which shows a pleat screen. It is a top view which shows a pleat screen. It is a side view which shows a raising / lowering cord winding apparatus. It is a front view which shows a raising / lowering cord winding apparatus. It is a top view which shows a raising / lowering cord winding apparatus. It is a side view which shows a raising / lowering cord winding apparatus. It is a rear view which shows operation | movement of a raising / lowering cord winding apparatus. It is a rear view which shows operation | movement of a raising / lowering cord winding apparatus. It is a rear view which shows operation | movement of a raising / lowering cord winding apparatus. It is a top view which shows the raising / lowering cord winding apparatus of 2nd embodiment. It is a front view which shows the raising / lowering cord winding apparatus of 2nd embodiment.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Head box, 2 ... Screen, 5 ... Lift code, 6 ... Lift code winding device, 10 ... Winding pipe, 11, 14 ... Guide roller.

Claims (5)

A lifting cord is suspended and supported from a winding pipe that is rotatably supported in the head box, a solar shading material is suspended and supported from the head box, and a lower end of the lifting cord is attached to a lower end portion of the solar shading material. Wear, rotate the winding pipe to wind up or rewind the lifting cord to allow the solar shading material to be raised and lowered, the winding pipe is a pipe whose diameter decreases from the proximal side to the distal side, The upper end portion of the lifting / lowering cord is attached to the distal end portion of the winding pipe, and the lifting / lowering cord wound on the proximal end side of the winding pipe is sequentially moved to the distal end side so as to be wound spirally. In the lifting cord winding device of the solar radiation shielding device,
The hoisting cord is guided to the winding pipe directly from the outside of the head box in a state of being substantially unwound from the winding pipe via the guide roller located on the base end side of the winding pipe, obliquely, An elevator cord winding device for a solar radiation shielding device, wherein the guide roller is supported so as not to be movable and rotatable, and the rotation shaft of the guide roller is positioned in parallel with the rotation shaft of the winding pipe. A lifting cord is suspended and supported from a winding pipe that is rotatably supported in the head box, a solar shading material is suspended and supported from the head box, and a lower end of the lifting cord is attached to a lower end portion of the solar shading material. Wear, rotate the winding pipe to wind up or rewind the lifting cord to allow the solar shading material to be raised and lowered, the winding pipe is a pipe whose diameter decreases from the proximal side to the distal side, The upper end portion of the lifting / lowering cord is attached to the distal end portion of the winding pipe, and the lifting / lowering cord wound on the proximal end side of the winding pipe is sequentially moved to the distal end side so as to be wound spirally. In the lifting cord winding device of the solar radiation shielding device,
The hoisting cord is guided directly from the outside of the head box to the winding pipe via a guide roller located on the proximal end side of the winding pipe in a state of being substantially rewound from the winding pipe, and the guide roller is The movable shaft is supported so as to be immovable and rotatable, and the rotation shaft of the guide roller is supported with respect to the lifting / lowering cord guided from the leading end side of the winding pipe to the guiding roller in a state where the lifting / lowering cord is substantially unwound from the winding pipe An elevating cord winding device for a solar radiation shielding device, characterized in that they are orthogonal to each other and supported obliquely with respect to the rotation axis of the winding pipe . The winding rotatably supports the pipe support member, a solar shading device according to claim 1 or 2, wherein the said guide rollers and rotatably supported by the support member below said take-up pipe Lift code winding device. The raising / lowering cord winding device for a solar radiation shielding device according to any one of claims 1 to 3 , wherein the guide roller is positioned rearward of a rotation axis of the winding pipe. Wherein the winding pipe to any one of claims 1 to 4, characterized in that it comprises an obstacle detection stopping device that prevents the rotation of the take-up pipe relative rotation detect and the drive shaft The raising / lowering cord winding device of the solar radiation shielding apparatus as described.

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