JP7018760B2 - Cloaking device - Google Patents

Description

The present invention relates to a cloaking device.

Shielding devices such as roll curtains, blinds, accordion curtains, pleated screen doors and partitions have been put into practical use. For example, if the shielding device is a horizontal blind, when it is opened, the slats and bottom rails, which are shielding members, are pulled up by pulling the elevating cord. When the horizontal blind is closed, the slats and the bottom rail are generally lowered by gravity using the weight of the slats and the bottom rail. At this time, a mechanism is known in which a braking force is applied to the elevating cord that moves with the movement of the slat and the bottom rail (particularly, the weight of the bottom rail is lowered) to reduce the downward momentum of the slat and the bottom rail. Of course, such movement is not limited to the self-weight descent, for example, automatic ascent applies to a roll curtain, and automatic lateral movement applies to an accordion curtain, for example.

Patent Document 1 discloses that the downward momentum of the slats and the bottom rail is reduced by applying a braking force to the movement of the elevating cord by using a damper.

Japanese Unexamined Patent Publication No. 2005-030083

However, in the configuration disclosed in Patent Document 1, the braking force may become unstable due to wear or dirt of the elevating cord.

The present invention has been made in view of such circumstances, and provides a shielding device capable of generating a stable braking force.

According to the present invention, the shielding device includes a shielding material, a tension cord, and a braking cord, and the shielding material is configured to automatically move in one direction, and the tension is pulled by pulling the tension cord. The shielding material is configured to move in the other direction by the amount of pulling the cord, the braking cord is separate from the tension cord, and the shielding material is moved when the shielding material is moved in one direction. A shielding device configured to brake is provided.

In the present invention, a braking cord separate from the tension cord is configured to brake the shielding material when the shielding material moves in one direction. Therefore, even if the tension cord is worn or dirty, a stable braking force can be generated.

Hereinafter, various embodiments of the present invention will be illustrated. The embodiments shown below can be combined with each other.
Preferably, the shielding device according to the above description includes a winding portion and a braking portion, and the winding portion winds the braking cord when the shielding material moves in the other direction, and the shielding material is unidirectional. The braking cord is a shielding device that rewinds the braking cord during movement and generates a braking force against the rewinding of the braking cord.
Preferably, it is the shielding device according to the above description, wherein the braking unit is a shielding device that generates the braking force according to the rotation speed of the winding unit.
Preferably, the shielding device according to the above description includes a take-up drive unit, and the take-up drive unit is stored when the shielding material is moved in one direction and is wound up when the shielding material is moved in the other direction. It is a shielding device that drives the winding unit so that the unit winds up the braking cord.
Preferably, it is the shielding device according to the above description, wherein the winding portion is a shielding device configured to wind the braking cord by being driven by the movement of the tension cord in the longitudinal direction and rotating.
Preferably, in the shielding device according to the above, the automatic movement is a descent due to the weight of the shielding material, the one-way movement is a descent, the other-direction movement is an ascent, and the tension cord. Is a shielding device, which is an elevating cord.

It is a front view of the shielding device of 1st Embodiment of this invention. It is a right side view of FIG. It is an enlarged view of the braking device 6 in FIG. 1 (the braking code 5, the cases 17a, 20a are cross-sectional views). FIG. 4A is a cross-sectional view taken along the line AA in FIG. 3 (case 19b is a cross-sectional view passing through the center of the input shaft 19a). FIG. 4B is a cross-sectional view taken along the line BB in FIG. 4A for the braking force generating unit 19. FIG. 5A is a front view (cross-sectional view of the support member 22) showing the braking device 6 in the shielding device of the second embodiment of the present invention, and FIG. 5B is shown in FIG. 5A for the elevating cord 11 and the pulley 23. It is a CC sectional view of.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. Various features in the embodiments shown below can be combined with each other. In addition, the invention is independently established for each characteristic item.

1. 1. First Embodiment The shielding device of the first embodiment of the present invention will be described with reference to FIGS. 1 to 4. The shielding device of this embodiment is a pleated screen 1. The pleated screen 1 includes a head box 2, a bottom rail 3, and a screen 4.

The screen 4 can be bent in a zigzag shape in the vertical direction, and is arranged between the head box 2 and the bottom rail 3. A pitch holding code (not shown) for holding the zigzag pitch of the screen 4 is arranged on the head box 2 and the bottom rail 3. As the bottom rail 3 rises and falls, the lower end of the screen 4 rises and falls.

The head box 2 is provided with an outlet at one end of the cord 9 and an outlet at the other end of the cord (not shown). An elevating cord (tension cord) 11 is provided in the head box 2.

One end of the elevating cord 11 is led out from the outlet 9 at one end of the cord to the outside of the head box 2, and is attached to the bottom cap 3a attached to the end of the bottom rail 3. A knob 12 is provided on the elevating cord 11 between the cord one end outlet 9 and the bottom cap 3a, and it is possible to grip the knob 12 and pull down the elevating cord 11. One end of the elevating cord 11 may be attached to the knob 12, and a separate operation cord may be provided between the knob 12 and the bottom cap 3a.

The other end of the elevating cord 11 is led out of the head box 2 from the other end outlet of the cord and is attached to the bottom rail 3. The elevating cord 11 is inserted through the screen 4 between the head box 2 and the bottom rail 3. With such a configuration, the blind 3 and the screen 4 can be raised by the amount of pulling the elevating cord 11 by pulling the elevating cord 11.

A stopper 7 is provided at the outlet 9 at one end of the cord. The stopper 7 has a function of preventing the screen 4 and the bottom rail 3 from falling due to their own weight. The stopper 7 switches between a state in which the elevating cord 11 is prevented from moving and a state in which the elevating cord 11 is allowed to move by operating the elevating cord 11. The stopper 7 may be one arranged in the head box 2 (eg, a heart cam stopper).

A braking device 6 is provided in the head box 2. The braking device 6 has a function of braking the bottom rail 3 when the screen 4 and the bottom rail 3 descend to reduce the descending speed of the bottom rail 3. As shown in FIG. 3, the braking device 6 includes a winding unit 16, a braking unit 17, and a winding drive unit 20. As shown in FIGS. 1 and 4A, one of the two elevating cords 11 is inserted into an insertion hole 21 provided in the braking device 6.

A braking cord 5 is provided between the two elevating cords 11 between the head box 2 and the bottom rail 3. One end of the braking cord 5 is attached to the take-up portion 16, and the other end of the braking cord 5 is attached to the bottom rail 3. The braking code 5 is separate from the elevating code 11. The winding unit 16 is configured to wind the braking cord 5 when the bottom rail 3 is raised and to rewind the braking cord 5 when the bottom rail 3 is lowered.

The braking unit 17 is configured to generate a braking force with respect to the rewinding of the braking cord 5. Specifically, the braking unit 17 includes a case 17a, a transmission gear unit 18, and a braking force generating unit 19. The transmission gear unit 18 transmits the rotation of the winding unit 16 to the braking force generating unit 19. In the present embodiment, the transmission gear unit 18 is a worm gear and includes a worm wheel 18a and a worm 18b. The worm wheel 18a rotates with the rotation of the take-up portion 16. The worm 18b rotates with the rotation of the worm wheel 18a. The transmission gear portion 18 converts the direction of the rotation axis from the horizontal direction to the vertical direction. The braking force generating portion 19 includes an input shaft 19a, a case 19b, an elastic deformation portion 19c, a centrifugal diameter expanding portion 19d, and a protrusion 19e. The input shaft 19a rotates with the rotation of the worm 18b. The elastic deformation portion 19c and the centrifugal diameter expansion portion 19d rotate with the rotation of the input shaft 19a. The protrusion 19e is provided so as to project radially outward from the case 19b. By engaging the protrusion 19e with the case 17a, the case 19b becomes non-rotatable with respect to the case 17a.

When the take-up portion 16 rotates in the rewinding direction as the braking cord 5 is rewound when the bottom rail 3 descends, the input shaft 19a rotates via the transmission gear portion 18 along with the rotation. Centrifugal force is applied to the centrifugal enlarged diameter portion 19d with rotation, and the elastically deformed portion 19c is elastically deformed, so that the centrifugal enlarged diameter portion 19d moves outward in the radial direction and rotates while being pressed against the case 19b. According to such a configuration, the friction between the centrifugal enlarged diameter portion 19d and the case 19b generates a braking force according to the rotation speed of the winding portion 16.

The take-up drive unit 20 has a case 20a and a spring mechanism 20b arranged inside the case 20a. The spring mechanism 20b includes a mainspring. The spring mechanism 20b has a torque that is rewound by the weight of the bottom rail 3 and the screen 4, and is stored when the bottom rail 3 is lowered. When the bottom rail 3 is raised, the winding unit 16 is rotated in the winding direction by the stored force of the winding drive unit 20. Along with this rotation, the braking cord 5 is wound around the winding unit 16.

Both ends of the take-up portion 16 are bearing by the cases 17a and 20a. The cases 17a and 20a are fixed to the head box 2.

Here, the ascending operation and the descending operation of the pleated screen 1 will be described.
FIG. 1 shows a state in which the bottom rail 3 is in the lower limit position. When the knob 12 is pulled down from the state shown in FIG. 1, the stopper 7 is in a state of allowing the elevating cord 11 to move, and the length of the elevating cord 11 being led out from the one end exit 9 of the cord becomes longer. The length of the 11 drawn out from the other end outlet of the cord becomes shorter, and the bottom rail 3 attached to the other end of the elevating cord 11 rises. As the bottom rail 3 rises, the screen 4 rises while being folded onto the bottom rail 3.

In the state where the bottom rail 3 is in the lower limit position, the take-up drive unit 20 is stored and the braking cord 5 is rewound from the take-up unit 16. As the bottom rail 3 rises, it is driven by the take-up drive unit 20 to rotate the take-up unit 16 in the take-up direction, and the braking cord 5 is taken up by the take-up unit 16.

When the screen 4 and the bottom rail 3 try to descend due to their own weight when the knob 12 is released, the stopper 7 is in a state of blocking the movement of the elevating cord 11, and the screen 4 and the bottom rail 3 are prevented from descending.

When the knob 12 is slightly pulled down from that state, the stopper 7 is in a state of allowing the lifting cord 11 to move, and when the knob 12 is released in that state, the screen 4 and the bottom rail 3 are lowered by their own weight.

As the bottom rail 3 descends, the braking cord 5 is rewound from the winding unit 16 and the winding unit 16 rotates in the rewinding direction. The braking force generation unit 19 generates a braking force with the rotation of the winding unit 16, and the braking force is applied to the winding unit 16. By this braking force, a braking force is applied to the rewinding of the braking cord 5, and the bottom rail 3 descends slowly. Further, the take-up drive unit 20 is stored when the bottom rail 3 is lowered.

As described above, in the present embodiment, the braking force is generated by the braking cord 5 that the user normally does not touch, so that even if the elevating cord 11 is worn or dirty, a stable braking force is generated. Can be made to.

This embodiment can be implemented in the following embodiments.
-A plurality of braking codes 5 may be used. In this case, more stable braking becomes possible.
-The number of elevating cords 11 may be one or three or more.
The rotation of the winding unit 16 may be directly transmitted to the braking force generating unit 19.
The transmission gear unit 18 may be realized by another type of gear mechanism capable of changing the direction of the rotating shaft.
The braking force generating unit 19 may be an oil damper.
-The configuration of the above embodiment can be applied to any direct pull type shielding device (roll curtain, blind, accordion curtain, pleated screen door, partition, etc.) other than the pleated screen 1.
-The "automatic movement" in the claims includes automatic descent, automatic ascent, automatic lateral movement, and the like. In automatic descent, the shielding material is usually lowered by the action of gravity. In automatic ascent and lateral movement, the shielding material is usually ascended or laterally moved by an urging means such as a spring.

2. 2. Second Embodiment The second embodiment of the present invention will be described with reference to FIG. This embodiment is similar to the first embodiment, and instead of the winding drive unit 20 rotating the winding unit 16 when the bottom rail 3 is raised, the winding unit 16 moves as the elevating cord 11 moves. The main difference is that it is rotated. Hereinafter, the differences will be mainly described.

As shown in FIG. 5A, the braking device 6 of the present embodiment does not include the take-up drive unit 20, and one end of the take-up unit 16 is bearing by a support member 22.

The braking unit 17 includes a pulley 23. The take-up portion 16 is configured to rotate as the pulley 23 rotates.

As shown in FIG. 5B, the elevating cord 11 is wound around the pulley 23, and the pulley 23 is configured to rotate as the elevating cord 11 moves in the longitudinal direction. It is sufficient to wind at least one of the plurality of elevating cords 11 around the pulley 23, and the elevating cord 11 not wound around the pulley 23 is provided in the braking device 6 as in the first embodiment. It can be inserted into the insertion hole 21.

Here, the ascending operation and the descending operation of the pleated screen 1 will be described.
FIG. 1 shows a state in which the bottom rail 3 is in the lower limit position. When the knob 12 is pulled down from the state shown in FIG. 1, the stopper 7 is in a state of allowing the elevating cord 11 to move, and the length of the elevating cord 11 being led out from the one end exit 9 of the cord becomes longer. The length of the 11 drawn out from the other end outlet of the cord becomes shorter, and the bottom rail 3 attached to the other end of the elevating cord 11 rises. As the bottom rail 3 rises, the screen 4 rises while being folded onto the bottom rail 3.

When the bottom rail 3 is in the lower limit position, the braking cord 5 is rewound from the take-up portion 16. When the pulley 23 is rotated by the longitudinal movement of the elevating cord 11, the take-up portion 16 rotates in the take-up direction, and the braking cord 5 is taken up by the take-up portion 16. That is, the winding portion 16 is driven and rotated by the movement of the elevating cord 11 in the longitudinal direction to wind the braking cord 5.

When the screen 4 and the bottom rail 3 try to descend due to their own weight when the knob 12 is released, the stopper 7 is in a state of blocking the movement of the elevating cord 11, and the screen 4 and the bottom rail 3 are prevented from descending.

When the knob 12 is slightly pulled down from that state, the stopper 7 is in a state of allowing the lifting cord 11 to move, and when the knob 12 is released in that state, the screen 4 and the bottom rail 3 are lowered by their own weight.

As the bottom rail 3 descends, the braking cord 5 is rewound from the winding unit 16 and the winding unit 16 rotates in the rewinding direction. The braking force generation unit 19 generates a braking force with the rotation of the winding unit 16, and the braking force is applied to the winding unit 16. By this braking force, a braking force is applied to the rewinding of the braking cord 5, and the bottom rail 3 descends slowly. When the bottom rail 3 is lowered, a braking force may or may not be applied to the movement of the elevating cord 11 in the longitudinal direction.

As described above, also in this embodiment, since the braking force is generated by the braking cord 5 that the user normally does not touch, even if the elevating cord 11 is worn or dirty, a stable braking force is generated. Can be made to.

3. 3. Other Embodiments-In the above embodiment, the braking cord 5 is wound around the winding portion 16 when the bottom rail 3 is raised, but instead of providing the winding portion 16, the braking cord 5 is provided by another configuration. It may be pulled into the head box 2. For example, one end of the braking cord 5 may be attached to a slide member that slides with the movement of the elevating cord 11, and a braking force may be generated with the movement of the slide member when the shielding material is lowered.

1: Pleated screen 2: Head box 3: Bottom rail 3a: Bottom cap 4: Screen 5: Braking cord 6: Braking device 7: Stopper 9: Cord one end outlet 11: Lifting cord 12: Knob 16: Winding part 17: Braking Part 17a: Case 18: Transmission gear part 18a: Worm wheel 18b: Warm 19: Braking force generating part 19a: Input shaft 19b: Case 19c: Elastic deformation part 19d: Centrifugal diameter expansion part 20: Winding drive part 20a: Case 20b : Spring mechanism 21: Insertion hole 22: Support member 23: Pulley

Claims (6)

It ’s a cloaking device,
Equipped with shielding material, tension cord, braking cord,
The shielding material is configured to automatically move in one direction.
By pulling the tension cord, the tension cord is configured to move the shielding material in the other direction by the amount of pulling the tension cord.
The braking cord is a shielding device that is separate from the tension cord and is configured to brake the shielding material when the shielding material moves in one direction. The shielding device according to claim 1.
Equipped with a winding part and a braking part,
The winding unit winds up the braking cord when the shielding material moves in the other direction, and rewinds the braking cord when the shielding material moves in one direction.
The braking unit is a shielding device that generates a braking force against the rewinding of the braking cord. The shielding device according to claim 2.
The braking unit is a shielding device that generates the braking force according to the rotation speed of the winding unit. The shielding device according to claim 2 or 3.
Equipped with a take-up drive unit
The take-up drive unit stores energy when the shield material moves in one direction, and drives the take-up unit so that the take-up unit winds up the braking cord when the shield material moves in the other direction. Device. The shielding device according to claim 2 or 3.
The winding unit is a shielding device configured to wind the braking cord by being driven by the movement of the tension cord in the longitudinal direction and rotating. The shielding device according to any one of claims 1 to 5.
The automatic movement is a descent due to the weight of the shielding material.
The one-way movement is a descent.
The other-direction movement is an ascent and
The tension cord is a cloaking device which is an elevating cord.

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