JP6799944B2 - Cloaking device - Google Patents

Description

The present invention relates to a shielding device such as a horizontal blind or a pleated curtain.

As one type of operating device for adjusting the angle of the slats of the horizontal blind and raising and lowering the slats, an operating rod for adjusting the angle of the slats is hung from one end of the head box, and the operating rod is penetrated from the head box. Or, there is one in which the lifting cord is hung separately without letting it.

In such a horizontal blind, the slats are rotated via the angle adjusting device and the ladder cord arranged in the head box by rotating the operating rod. Further, the bottom rail and slat are pulled up by pulling the elevating cord pulled out from the head box, and the bottom rail and slat are lowered by pulling the pulled out elevating cord into the head box.

Inside the head box, a bottom rail and a self-weight drop prevention device for preventing the self-weight drop of the slats as a shielding material are provided. When the elevating cord is pulled out and then released, this self-weight descent prevention device is in a locked state that prevents the elevating cord from being pulled into the headbox and prevents the bottom rail and slats from descending by their own weight. When pulled out to, the locked state is released and the bottom rail and slats can be lowered by lowering their own weight. It is also possible to pull out the lifting cord from the locked state to pull up the bottom rail and slats.

Patent Document 1 describes a damper including a centrifugal governor that generates a braking force and a shaft (cord catch) connected to a brake portion, and the lifting cord comes into contact with the outer peripheral surface of the shaft to move the lifting cord. Disclosed is a blind lifter with a damper, characterized in that the shaft rotates and the brake portion operates. By using this damper, it is possible to reliably give resistance to the movement of the lifting cord due to the lowering of its own weight.

Japanese Unexamined Patent Publication No. 2005-0304

In recent years, the miniaturization of head boxes and the refinement of dampers have progressed. In particular, a precision damper designed so that the parts come close to each other, and the damper consisting of the cord catch and the centrifugal governor, is in a direction parallel to the axial direction of the cord catch (for example, in the vertical downward direction or the horizontal direction). If it is fixed in the head box so as to hold it down, the damper will be unnecessarily pressurized. As a result, there is a risk of performance deterioration due to distortion of the damper housing (damper case).

An object of the present invention is to provide a shielding device configured to prevent unnecessary pressurization of a damper.

According to the first aspect of the present invention, it is a shielding device configured to be able to raise and lower the shielding material by pulling a tension cord, and is a damper having a case, which is driven by the lowering of its own weight of the shielding material. A damper that generates resistance to the input applied by the tension cord and adds the resistance to the tension cord by the reaction thereof, a head box in which the case is installed with the inner bottom surface or side surface as an installation surface, and the damper. The contact means is provided with a contact means for preventing the displacement, and the contact means is configured to contact the upper surface of the case to prevent the displacement of the damper when the damper is displaced in a direction away from the installation surface. A shielding device is provided.

According to the second aspect of the present invention, it is a shielding device configured to be able to raise and lower the shielding material by pulling a pulling cord, and is a damper having a case, which is driven by the lowering of its own weight of the shielding material. A damper that generates resistance with the input applied by the tension cord and adds the resistance to the tension cord by the reaction thereof is provided, and the case is provided with a rotating member that rotates inside the rotating member. A cloaking device is provided that is configured so that no pressure is applied in the direction perpendicular to the surface of revolution.

According to the present invention, the damper is arranged in the head box so that the contact means prevents the damper from being displaced in the head box in the direction away from the installation surface on which the damper is installed. The required pressure is relieved and the performance of the damper can be prevented from deteriorating.

Hereinafter, various embodiments of the present invention will be illustrated. The embodiments shown below can be combined with each other.

Preferably, inside the case, a rotation transmission mechanism that transmits rotation by inputting the movement of the tension cord, and centrifugal force is applied to the weight in the outer diameter direction by the transmitted rotation, and this is the inner wall of the case. A centrifugal governor is provided which comes into contact with and generates the resistance.

Preferably, the rotation transmission mechanism and the centrifugal governor are vertically configured.

Preferably, the rotation transmission mechanism and the centrifugal governor are configured in parallel.

Preferably, the abutting means is an angle adjusting shaft of the slats.

Preferably, the abutting means is a fixing member provided on the head box, and is a displacement of the damper to prevent a displacement in a direction away from the installation surface and a displacement in the installation surface direction.

Preferably, the fixing member is in constant contact with the damper at a portion other than the centrifugal governor.

Preferably, the abutting means is a rib provided on the headbox.

Preferably, the abutting means is a surface of the headbox facing the installation surface.

Preferably, the case is provided with a protrusion, and the headbox is provided with an insertion hole into which the protrusion is inserted.

Preferably, the damper includes a cord catch that sandwiches the tension cord, and the position of the cord catch in the lateral direction of the head box substantially coincides with the position of the protrusion.

Preferably, a rotating member that rotates about an axis perpendicular to the installation surface is provided.

Preferably, the rotating member is the weight in the centrifugal governor, and the shaft is the rotating shaft of a weight holder that holds the weight.

Preferably, the rotating member is a cord catch that sandwiches the tension cord, and the shaft is a rotating shaft of a roller that constitutes the cord catch.

Preferably, in the damper, the rotating member is configured to rotate in close proximity to or in contact with the inner surface of the case.

Preferably, the rotating member is configured to be non-contact with the case or other members housed therein when the rotating member is stationary.

Preferably, the rotating member is configured to be non-contact with the case or other members housed therein during rotation of the rotating member.

Preferably, the rotating member is configured to be non-contact with the case or other members housed therein when the case is separated from the installation surface of the headbox.

Preferably, the case is held by a snap-fit mechanism.

It is a schematic view which looked at the horizontal blind which concerns on 1st to 3rd Embodiment from the front. It is a schematic view which looked at the horizontal blind shown in FIG. 1 from the left side surface of FIG. It is a schematic view which looked at the region A surrounded by the alternate long and short dash line of FIG. 1 from the front. It is a schematic diagram which shows the inside of a centrifugal governor. It is a schematic view which looked at the XX cross section of FIG. 3 from the upper surface. FIG. 3 is a view of a YY cross section of FIG. 3 viewed from the left side surface, and is a schematic view for explaining the arrangement of dampers according to the first embodiment. It is a schematic diagram for demonstrating the modification of the arrangement of the damper shown in FIG. FIG. 3 is a view of a YY cross section of FIG. 3 viewed from the left side surface, and is a schematic view for explaining the arrangement of dampers according to the second embodiment. FIG. 3 is a view of a YY cross section of FIG. 3 viewed from the left side surface, and is a schematic view for explaining the arrangement of dampers according to the third embodiment. This is an example of a solar radiation shielding device provided with a braking device 1000 according to a specific example (this example) of the first embodiment. FIG. 10 is an enlarged view of the inside of the head box 1. It is a figure which shows the CC cross section in FIG. It is a figure which shows the positional relationship of the rotation center of a mounting cylinder 702 and a weight 340. It is an exploded perspective view of the braking device 1000 according to this example, (a) is a view seen from the front upper side, and (b) is a view seen from the rear upper side. It is a figure which shows the example which provided the groove 709 in the base instead of providing the protrusion 341 in the weight 340, (a) is a plan view, (b) is the cross-sectional view of the SS line cut portion. It is an assembly drawing of the braking device 1000 which concerns on this example, (a) is a front perspective view, (b) is a rear perspective view, and (c) is a left side view. It is a figure which shows the case 10A which concerns on this example, (a) is a front perspective view, (b) is a rear perspective view. It is a figure which shows the case 10A which concerns on this example, (a) is a plan view, (b) is a perspective view seen from the lower side. FIG. 16 (c) is a cross-sectional view taken along the line AA of FIG. It is sectional drawing of the braking device 1000 which concerns on this example. 19A and 19B are views showing how the braking device 1000 of the present invention brakes the cord CD. FIG. 19A shows a state in which no tension is applied to the cord CD (steady state), and FIG. 19B shows the cord CD. When tension is applied and the cord CD is sandwiched between the lorlet 240 and the roller portion 42 (sandwiched state), (c) summarizes the rotation directions of each member when the state changes from (a) to (b). It is a figure. It is a figure which shows another example which concerns on a specific example. It is a figure which shows another example which concerns on a specific example. It is a figure which shows another example which concerns on a specific example. It is a figure which shows the further modification of another example shown in FIG.

A form for carrying out the invention

Hereinafter, an embodiment in which the shielding device according to the present invention is embodied in a horizontal blind will be described with reference to the drawings. The arrow W direction shown in the drawing indicates the longitudinal direction of the head box 1 described later. The arrow H direction indicates the height direction of the head box 1. The arrow D direction indicates the lateral direction of the head box 1.

<First viewpoint>
Here, the shielding device according to the first aspect of the present invention is a shielding device configured so that the shielding material can be raised and lowered by pulling a tension cord, and is a damper having a case, and the weight of the shielding material itself. A damper that generates resistance to the input applied by the tension cord that is driven as it descends and adds the resistance to the tension cord by the reaction, and a head box in which the case is installed with the inner bottom surface or side surface as the installation surface. And a contact means for preventing the displacement of the damper, and the contact means abuts on the upper surface of the case when the damper is displaced in a direction away from the installation surface to prevent the displacement of the damper. A shielding device configured to do.
, A cloaking device.

<Second viewpoint>
Further, the shielding device according to the second aspect of the present invention is a shielding device configured so that the shielding material can be raised and lowered by pulling a tension cord, and is a damper having a case, and the weight of the shielding material is lowered. The case is provided with a damper that generates resistance with the input applied by the tension cord that is driven by the tension cord and adds the resistance to the tension cord by the reaction thereof, and the case is provided with a rotating member that rotates inside the damper. It is a shielding device configured so that pressure is not applied in a direction perpendicular to the rotating surface of the rotating member.

(First Embodiment)
(1) Description of Configuration (1-1) Configuration of Overall Horizontal Blind The horizontal blind according to the first embodiment is an example of the shielding device according to the first aspect described above. As shown in FIGS. 1 and 2, in the horizontal blind according to the first embodiment, a plurality of stages of slats 3 are suspended and supported from the head box 1 via a plurality of rudder cords 2, and the rudder cord 2 is supported. A bottom rail 4 is suspended and supported at the lower end. The multi-stage slat 3 and bottom rail 4 function as a solar radiation shielding material.

As shown in FIGS. 1 and 3, a plurality of guide pulleys 24 (three in the present embodiment) are arranged in the head box 1 in the vicinity of each ladder code 2. The guide pulley 24 is configured to be rotatable by a shaft 26 in a guide pulley case (not shown), and the shaft 26 is pivotally supported by the guide pulley case. The ladder cord 2 is inserted into the head box 1 through an insertion hole 27 provided on the bottom surface of the head box 1. The upper end portion thereof is attached to the drum 6, and the angle adjusting shaft 7 is fitted in the central portion of the drum 6.

Therefore, when the angle adjusting shaft 7 is rotated, the drum 6 is rotated, and one of the ladder cords 2 is pulled up with the rotation of the drum 6, so that the angles of the slats 3 are adjusted in the same phase.

An operation rod 8 is suspended and supported at one end of the head box 1. When the operation rod 8 is rotated, the angle adjusting shaft 7 is rotated via a gear box (not shown) arranged in the head box 1. Therefore, the angle of each slat 3 can be adjusted by rotating the operation rod 8.

A plurality of (three in this embodiment) elevating cords 10 (an example of a "tensile cord" in the claims) are inserted into the slats 3, and one end of the elevating cords 10 is attached to the bottom rail 4. .. That is, each guide pulley 24 is arranged corresponding to each elevating cord 10.

As shown in FIG. 1, the other ends of the three elevating cords 10 are arranged at one end of the head box 1 via the dampers 5 via the guide pulleys 24 arranged in the longitudinal direction of the head box 1. It is guided by the self-weight drop prevention device 1100.

Each elevating cord 10 is inserted into the operating rod 8 from its own weight descent prevention device 1100 via a gearbox, and its tip is connected to a cord equalizer 8b provided below the operating portion 8a. Therefore, when the cord equalizer 8b is pulled downward and the elevating cord 10 is pulled out from the head box 1, the bottom rail 4 is pulled up and the slats 3 are pulled up.

Then, if the pull-out operation of the elevating cord 10 is stopped and the elevating cord 10 is released, the self-weight drop prevention device 1100 is activated to prevent the self-weight drop of the slat 3 and the bottom rail 4. Further, when the elevating cord 10 is slightly pulled downward from the state where the self-weight descent prevention device 1100 is operating, the operation of the self-weight descent prevention device 1100 is released, and the slats 3 and the bottom rail 4 can be lowered by their own weight. It becomes. As the self-weight drop prevention device 1100, for example, a known self-weight drop prevention device 1100 disclosed in Japanese Patent Application Laid-Open No. 2001-173343 may be used. That is, the slats 3 and the bottom rail 4, which are shielding materials, can be raised and lowered by pulling the lifting cord 10.

(1-2) Damper Next, the damper 5 will be described with reference to FIGS. 3 to 5. The damper 5 according to the present embodiment generates resistance with the input applied by the elevating cord 10 which is driven by the self-weight lowering of the slat 3 and the bottom rail 4 which are shielding materials, and resists the elevating cord 10 by the reaction. Is configured to add. Further, the damper 5 has a knurl 20, a shaft 21, a centrifugal governor 22, and a pinching pulley 23, which are provided in a damper case 5d (an example of a "case" within the scope of claims).

<Knurling>
The knurl 20 (an example of a "rotating member" in the claims) is fixed to a shaft 21. The outer peripheral surface of the knurl 20 is knurled. Further, as shown in FIG. 3, in the present embodiment, the direction related to the shaft 21 of the knurl 20 (the axial direction of the cord catch 30) is the vertical direction. In other words, the shaft 21 is perpendicular to the installation surface 1c in the headbox 1 described later.

<Centrifugal governor>
The centrifugal governor 22 includes a governor case 22d, and the knurl 20 and the pinching pulley 23 are rotatably supported by the governor case 22d. In the present embodiment, the centrifugal governor 22 is provided on the lower side of the knurl 20 and the pinching pulley 23, but may be provided on the upper side or on both the upper and lower sides. As shown in FIG. 4, the centrifugal governor 22 has a one-way clutch 22a, a planetary gear mechanism 22b, a shaft 22e, and a blade 22c (an example of a “centrifugal expansion portion” in the claims) in the governor case 22d.

The rotation of the shaft 21 is input to the one-way clutch 22a. The one-way clutch 22a is in a non-transmission state in which the rotation of the shaft 21 of the lorlet 20 cannot be transmitted to the shaft 22e via the planetary gear mechanism 22b when the lifting cord 10 is displaced in the ascending direction of the bottom rail 4. When the elevating cord 10 is displaced in the descending direction of 4, the rotation of the shaft 21 of the lorlet 20 is set to a transmission state capable of being transmitted to the shaft 22e via the planetary gear mechanism 22b. The blade 22c is configured to suppress the rotation of the knurl 20 when a rotational force is applied to the knurl 20 in the transmission state related to the one-way clutch 22a.

That is, when the elevating cord 10 is displaced by the weight of the slat 3 when the slat 3 is lowered, the rotation of the shaft 21 of the knurl 20 is transmitted to the shaft 22e in the centrifugal governor 22, and the centrifugal governor 22 is moved to the elevating cord 10. Resistance is given to the displacement, and the displacement of the lifting cord 10 is suppressed. Therefore, it is possible to reduce the displacement speed that is accelerated by the weight of the slat 3 when the slat 3 is lowered.

More specifically, when the lorette 20 is rotated by the displacement of the elevating cord 10 of the bottom rail 4, the planetary gear mechanism 22b (an example of the "acceleration mechanism" in the claims) in the centrifugal governor 22 accelerates this. The blade 22c is transmitted to the shaft 22e, and the blade 22c rotates as the shaft 22e rotates. Centrifugal force acts as the blade 22c rotates, and the blade 22c comes into contact with the inner wall of the governor case 22d of the centrifugal governor 22 to generate a frictional force. As a result, the rotation of the knurl 20 is suppressed. Therefore, where the displacement speed increases at an accelerating rate as the slat 3 descends, the displacement of the elevating cord 10 is suppressed, so that the displacement speed of the bottom rail 4 during the lowering operation of the slat 3 can be reduced. ..

On the other hand, if the operator displaces the elevating cord 10 when the slat 3 is lifted, the rotation of the shaft 21 of the knurl 20 is not transmitted to the shaft 22e by the one-way clutch 22a. The operator's operation on the cord 10 means that the centrifugal governor 22 does not function and operates as it is. Therefore, it is possible to operate the slats 3 without imposing a load on the operator during the raising operation.

Further, the one-way clutch 22a is in a non-transmission state when the elevating cord 10 is displaced in the ascending direction of the bottom rail 4, and is in a transmitting state when the elevating cord 10 is displaced in the descending direction of the bottom rail 4. The displacement speed of the bottom rail 4 can be reduced by making the resistance force of the blade 22c function during the lowering operation of lowering due to the weight of the slats 3 and the bottom rail 4. Further, by not allowing the blade 22c to function during the raising operation of the slats 3 operated by the operator, the operator can operate the blade 22c without applying a load, and the blade 22c is loaded when the elevating cord 10 is suddenly pulled. Can be suppressed.

Further, below the knurl 20, a pinching pulley 23 for pinching and guiding the lifting cord 10 in cooperation with the knurl 20 is provided, so that the lifting cord 10 can be reliably brought into contact with the knurl 20 and lifted and lowered. The contact resistance between the cord 10 and the knurl 20 becomes large, the displacement of the elevating cord 10 and the knurl 20 can be reliably synchronized, and the deceleration by the centrifugal governor 22 can be transmitted more reliably.

Further, since the outer peripheral surface of the knurl 20 is subjected to knurling, the contact resistance between the elevating cord 10 and the knurl 20 increases, the displacement of the elevating cord 10 and the knurl 20 are reliably synchronized, and the elevating cord 10 The deceleration of the moving speed (that is, the deceleration of the descending speed of the bottom rail 4) can be transmitted more reliably.

<Pinch pulley>
As shown in FIG. 5, the pinching pulley 23 is configured to reliably contact the elevating cord 10 by pressing the elevating cord 10 together with the knurl 20. As a result, the movements of the elevating cord 10 and the knurl 20 can be synchronized. In other words, the knurl 20 and the pinching pulley 23 function as a cord catch 30 for sandwiching the elevating cord 10.

(1-3) Arrangement of Dampers Next, the arrangement of the dampers 5 inside the head box 1 according to the first embodiment will be described with reference to FIG.

<Insert hole / protrusion>
The insertion hole 1a is provided on the installation surface 1c where the damper 5 is installed in the head box 1. As shown in FIG. 6, in the present embodiment, the installation surface 1c is the inner bottom surface of the head box 1. Further, the protrusion 5b (an example of the "protrusion" in the claims) is provided on the contact surface 5c that abuts on the installation surface 1c in the damper case 5d. In the present embodiment, the contact surface 5c is the outer bottom surface of the damper case 5d.

That is, by inserting the protrusion 5b provided on the contact surface 5c into the insertion hole 1a provided on the installation surface 1c, the damper case 5d is fixed in the direction of the shaft 21 as in the conventional method of fixing with a screw or the like. The damper 5 is installed in the head box 1 without applying unnecessary pressure. As a result, the displacement of the damper 5 in the horizontal direction (arrow W direction and arrow D direction) is regulated.

By the way, in the code catch 30, it is preferable that the position of the head box 1 in the arrow D direction substantially coincides with the position of the protrusion 5b. Further, it is more preferable that the protrusion 5b on the damper 5 is provided near the substantially center of the contact surface 5c on the premise that the elevating cord 10 passes through the vicinity of the substantially center in the direction of the arrow D in the damper case 5d. This is to prevent the damper 5 from rotating in the contact surface 5c due to an unbalanced torque applied when the elevating cord 10 is displaced.

<Angle adjustment axis>
The angle adjusting shaft 7 (an example of "contact means" in the claims) is located above the damper 5. In other words, the damper 5 is arranged so as to be located below the angle adjusting shaft 7. Here, no pressure is generated between the damper 5 and the angle adjusting shaft 7. For example, in FIG. 6, the angle adjusting shaft 7 and the damper 5 are arranged so as to have a gap, and it is shown that the pressure is not generated. It is possible to regulate the displacement (arrow H direction) of the damper 5 in the direction away from the installation surface 1c without applying unnecessary pressure in the shaft 21 direction to the damper case 5d as in the conventional method of fixing with a screw or the like. it can.

It is preferable that no pressure is generated between the damper 5 and the angle adjusting shaft 7, and the gap shown in FIG. 6 may be set to substantially 0.

Further, it is preferable that the damper 5 is arranged so as to abut the angle adjusting shaft 7 near the substantially center of the damper 5 in the arrow D direction. When the damper 5 and the angle adjusting shaft 7 come into contact with each other, a biased torque is applied to the upper part of the damper 5 to prevent the protrusion 5b from coming off from the insertion hole 1a and causing the damper 5 to tilt or tip over. Because.

(2) Description of Operation Next, the operation of the horizontal blind provided with the damper 5 will be outlined.

(2-1) The ascending cord equalizer 8b is pulled downward by the operator, and the ascending cord 10 is pulled out from the head box 1. The elevating cord 10 is attached to the bottom rail 4 by inserting the self-weight drop prevention device 1100 in the head box 1, the damper 5, and the slats 3. Therefore, such a pull-out applies a force in the vertical upward direction to the bottom rail 4, pulls up the bottom rail 4, and pulls up the slat 3 at the same time. At this time, the one-way clutch 22a in the damper 5 is in a non-transmission state in which the rotation of the shaft 21 of the knurl 20 cannot be transmitted to the shaft 22e. That is, the braking force of the centrifugal governor 22 is not applied, and the burden on the operator is small. Further, by arranging the damper 5 described above, unnecessary pressure applied in the direction of the shaft 21 is reduced as compared with the conventional case.

(2-2) Lifting stop When the pulling operation of the lifting cord 10 is stopped and released by the operator, the self-weight drop prevention device 1100 in the head box 1 is activated to prevent the weight drop of the slats 3 and the bottom rail 4. Rail.

(2-3) When the elevating cord 10 is slightly pulled by the operator from the state where the descending self-weight descent prevention device 1100 is activated and the bottom rail 4 is stopped at a desired position, the self-weight descent prevention device during operation is in operation. The 1100 is released, and the bottom rail 4 descends by its own weight. At this time, the one-way clutch 22a in the damper 5 is in a transmission state in which the rotation of the shaft 21 of the knurl 20 can be transmitted to the shaft 22e. That is, since the elevating cord 10 is subjected to the resistance force of the centrifugal governor 22, the slat 3 gently descends together with the bottom rail 4. In other words, the acceleration of the descending speed can be prevented. Further, even when descending, the unnecessary pressure applied in the direction of the shaft 21 is reduced by the arrangement of the damper 5 described above as compared with the conventional case.

(2-4) Stopping the descent When the ascending of the elevating cord 10 accompanying the descent of the slat 3 and the bottom rail 4 is stopped by the operator's hand grasping or the like, the descent of the bottom rail 4 is stopped. Then, when the elevating cord 10 is released, the self-weight drop prevention device 1100 in the head box 1 is activated again. Then, the weight drop of the slats 3 and the bottom rail 4 is prevented.

(2-5) When the tilt operation rod 8 is rotated by the operator via the operation unit 8a, the angle adjusting shaft 7 rotates via a gear box (not shown) arranged in the head box 1. Then, the drum 6 rotates as the angle adjusting shaft 7 rotates, and one of the ladder cords 2 is pulled up as the drum 6 rotates, so that the angles of the slats 3 are adjusted in the same phase according to the rotation. ..

(3) Action and effect According to the above-described embodiment, the following action and effect can be achieved.

(A) The damper 5 is arranged so that the angle adjusting shaft 7 arranged in the head box 1 prevents displacement in the head box 1 in the direction away from the installation surface 1c on which the damper 5 is installed. , There is no unnecessary pressure generated when the damper 5 is fixed with screws or the like, and deterioration of the performance of the damper 5 can be prevented.

(B) The damper 5 is screwed by inserting the protrusion 5b provided on the contact surface 5c, which is the bottom surface of the damper case 5d, into the insertion hole 1a provided on the installation surface 1c, which is the bottom surface of the head box 1. It is possible to regulate the displacement of the damper 5 in the horizontal direction without unnecessary pressure generated when the damper 5 is fixed by the above.

In the modified example in which the cord catch 30 is close to the contact surface 5c as shown in FIG. 7, the knurl 20 and the pinching pulley 23 come into contact with the contact surface 5c due to the distortion of the damper case 5d. , It is considered that the performance of the damper 5 is significantly deteriorated. That is, in such a modified example, the effect of (a) by the arrangement of the damper 5 described above is large.

(Details of the first embodiment)
Subsequently, a more specific example of the damper 5 according to the first embodiment described above will be described. In the following specific example, the damper 5 corresponds to the braking device 1000, the elevating cord 10 corresponds to the cord CD, the protrusion 5b corresponds to the mounting cylinder 702, and the planetary gear mechanism 22b corresponds to the carrier 260 with internal teeth and The blade 22c and the shaft 22e correspond to the planetary gear 280, the weight holder 320 with the sun gear and the weight 340, the governor case 22d correspond to the case 10A, the pinching pulley 23 corresponds to the idle roller 40, and the lorlet 20. Corresponds to the lauret 240. Further, FIGS. 10 to 13 show a solar radiation shielding device provided with the braking device 1000 according to this example. The arrangement is substantially as described in the first embodiment described above, but in this example, the self-weight drop prevention device 1100 is on the slat side (that is, the left side in the drawing) of the braking device 1000.

The braking device 1000 according to this example is a braking device that brakes the movement of the cord. Specifically, in the braking device 1000 according to this example, the mechanism related to the motion conversion unit and the mechanism related to the resistance applying unit are provided so as to be positioned substantially vertically. Here, in this example, an idle roller 40 including a slider 220, a coil spring SP, a shaft core 41 and a roller portion 42, a lorlet 240, a pinion gear 50, a shaft core 31, a washer 241 and a carrier 260 with internal teeth and a planetary gear. 280 constitutes a motion conversion unit, and a weight 340, a weight holder 320 with a sun gear, and a case 10A constitute a resistance imparting unit.

4-1 <Overall configuration>
FIG. 14 is an exploded perspective view of the braking device 1000 according to this example. The braking device 1000 includes an alignment member 200, a case 10A, a slider 220, a coil spring SP, an idle roller 40 including a shaft core 41 and a roller portion 42, a lorette 240, a pinion gear 50, a lorette 240, and a shaft core through which the pinion gear 50 is inserted. It is composed of 31, washer 241 and carrier 260 with internal teeth, planetary gear 280, plate 300, weight holder 320 with sun gear, weight 340 and base 70.

In this example, the idle roller 40 and the knurl 240 function as sandwiching bodies for sandwiching the cord. Further, the idle roller 40 functions as a support column, and the knurl 240 functions as a roller that rotates by moving the cord in the longitudinal direction. Further, the slider 220 holds the idle roller 40 and the knurl 240.

As shown in FIG. 14, in this example, the carrier 260 with internal teeth is provided with four planetary gears 280, and the weight holder 320 with sun gears holds eight weights 340. Hereinafter, each member will be described.

4-1-1 <Alignment member 200>
As shown in FIGS. 16A and 16B, the alignment member 200 inserts the cord CD and adjusts the orientation of the cord CD. Further, a plurality of code CDs are arranged in the same direction with each other. The aligning member 200 can be formed of, for example, a resin such as plastic. Here, as shown in FIG. 16A, the directions of the arrows are front-back, left-right, and up-down, respectively. That is, the direction in which the distance between the first top wall groove 16 and the second top wall groove 17 becomes narrow is set to the front, and the left-right direction (width direction) and the up-down direction are determined.

1-1-2 <Case 10A>
Next, the case 10A will be described with reference to FIGS. 17 (a) and 17 (b) and FIG. Hereinafter, in FIG. 18, the leftward direction will be described as forward, the rightward direction will be referred to as rearward, the upward direction will be referred to as the right side, and the downward direction will be described as the left side. The case 10A constitutes a housing together with the base 70, and has a slider 220, a coil spring SP, an idle roller 40 including a shaft core 41 and a roller portion 42, a lorlet 240, a pinion gear 50, a shaft core 31, a washer 241 and the like. It holds a carrier 260 with internal teeth, a planetary gear 280, a plate 300, a weight holder 320 with a sun gear, and a weight 340.

Further, the case 10A constitutes the housing of the braking device 1000 together with the base 70, for example. Further, for example, together with the weight holder 320 with the sun gear and the weight 340, the resistance imparting portion is formed.

As shown in FIG. 17, in the case 10A, the top wall portion 11 having a substantially square outer shape, the front side wall portion 12f, the right side wall portion 12r and the left side wall portion connected to the front side wall portion 12f and the top wall portion 11 12l, a rear side wall portion 12b connected to each of the right side wall portion 12r and the left side wall portion 12l, and a front side wall portion 12f, a rear side wall portion 12b, a front side wall portion 12f, and a left side wall portion facing the top wall portion 11. The main configuration includes a flange portion 13 extending from 12l toward the radial side, a cylindrical portion 13C connected to the flange portion 13, and a cover portion 112 connected to the cylindrical portion 13C.

Guide grooves 113 are formed in the front side wall portion 12f and the rear side wall portion 12b. These two guide grooves 113 face each other in the front-rear direction. These guide grooves 113 are grooves for inserting the cord CD in the front-rear direction. Here, the number of cord CDs inserted into the guide groove 113 is not particularly limited, but in this example, an example in which three cord CDs are inserted in the vertical direction is shown (see FIG. 16).

Further, the right side wall portion 12r and the left side wall portion 12l are provided with engagement holes 19. As already described, the engagement hole 19 engages with the claw portion 209 of the alignment member 200 and fixes the alignment member 200 to the case 10A.

Further, a support groove 114 is provided above the left and right engaging holes 19. As shown in FIG. 16, the support groove 114 supports the protrusion 230 provided on the slider 220 when the case 10A holds the slider 220 inside. As a result, the slider 220 can be supported in a floating state. The details will be described later.

A first top wall groove 16 and a second top wall groove 17 are formed in the top wall portion 11. As shown in FIG. 18A, the first top wall groove 16 and the second top wall groove 17 are formed obliquely with respect to the longitudinal direction of the cord CD, that is, the front-rear direction, and one of the cord CDs. The distance between the first top wall groove 16 and the second top wall groove 17 is reduced toward the front in the longitudinal direction. Further, the first top wall groove 16 is formed in an arc shape, and the arc of the first top wall groove 16 is formed so as to be concentric with the inner peripheral surface of the carrier 260 with internal teeth in a plan view. On the other hand, the second top wall groove 17 is formed in a shape that draws a gentle curve. Specifically, the second top wall groove 17 has a substantially linear shape on the front side, and is curved in a direction away from the first top wall groove 16 toward the rear. This is because, when the second top wall groove 17 is made substantially linear, the first top wall groove 16 is an arc that approaches the code CD from the rear to the front, so that, for example, the shaft core 31 and the shaft core 41 This is to prevent the displacement in the vertical direction with respect to the cord CD from being different between the shaft core 31 and the shaft core 41 when moving along the first top wall groove 16 and the second top wall groove 17, respectively. That is, if one is an arc and the other is substantially straight, the vertical distance to the code CD is different in the front-rear direction. In this way, by bringing the displacements of the shaft core 31 and the shaft core 41 in the vertical direction close to each other, the knurl 240 and the roller portion 42 can appropriately sandwich the cord CD. The second top wall groove 17 is not limited to this, and for example, a groove having substantially the same shape as the first top wall groove 16 may be arranged to be curved toward the cord CD side. As a result, the displacement in the vertical direction with respect to the CD can be made substantially the same for the shaft core 31 and the shaft core 41, and the wear of the cord CD can be reduced. Here, in this example, in addition to making the displacement in the vertical direction with respect to the CD as similar as possible between the shaft core 31 and the shaft core 41, in consideration of the interaction due to the movement of other members and the like, FIG. 18 (a). ) Is adopted.

As shown in FIGS. 17A, 17B, and 18A, the edge of the first top wall groove 16 is outside the case 10A in the first top wall groove 16 in the plan view of the case 10A. A first guide wall 16A projecting upward from the first top wall groove 16 is provided at least at a part of the position along the edge of the above. In this example, the first guide wall 16A is provided so as to be approximately 90 degrees with respect to the first top wall groove 16. The purpose of the first guide wall 16A is to reduce the surface pressure of the shaft core 31 moving along the first top wall groove 16. That is, by providing the first guide wall 16A, the area in contact with the shaft core 31 is increased, so that the surface pressure of the shaft core 31 is reduced. This is because tension is applied to the cord CD and the surface pressure of the shaft core 31 is applied to the inner surface of the first top wall groove 16 while the braking device 1000 is operating, and the surface pressure is applied to the first top wall groove. This is because if the inner surface of 16 is scraped, the distance between the knurl 240 and the roller portion 42 changes, and the rotation transmission to the knurl 240 may become insufficient. By providing the first guide wall 16A, it is possible to prevent the case 10A from being scraped by the pressure from the shaft core 31. The wall thickness of the first guide wall 16A is arbitrary, but it may be appropriately designed in consideration of the material of the case 10A, the moving speed of the shaft core 31, and the like.

Further, in the plan view of the case 10A, the position along the outer edge of the case 10A in the second top wall groove 17 is at least a part of the position along the edge located far from the center of the case 10A. A second guide wall 17A that projects upward from the two top wall grooves 17 is provided. In this example, the second guide wall 17A is provided so as to be approximately 90 degrees with respect to the second top wall groove 17. The second guide wall 17A is intended to reduce the surface pressure of the shaft core 41 moving along the second top wall groove 17. That is, by providing the second guide wall 17A, the area in contact with the shaft core 41 is increased, so that the surface pressure of the shaft core 41 is reduced. This is because tension is applied to the cord CD and the surface pressure of the shaft core 41 is applied to the inner surface of the second top wall groove 17 while the braking device 1000 is operating, and the surface pressure is applied to the second top wall groove. This is because if the inner surface of the 17 is scraped, the distance between the knurl 240 and the roller portion 42 changes, and the rotation transmission to the knurl 240 may become insufficient. By providing the second guide wall 17A, it is possible to prevent the case 10A from being scraped by the pressure from the shaft core 41. The wall thickness of the second guide wall 17A is arbitrary, but it may be appropriately designed in consideration of the material of the case 10A, the moving speed of the shaft core 41, and the like.

When the case 10A is molded from a strong material such as metal, it is not necessary to provide the first guide wall 16A and the second guide wall 17A. This is because the case 10A is robust, so that the case 10A is hardly scraped by the pressure from the shaft core 31 and the shaft core 41.

The collar portion 13 faces the top wall portion 11 and extends radially from the front side wall portion 12f, the rear side wall portion 12b, the front side wall portion 12f, and the left side wall portion 12l, and is omitted in this example. It is said to be circular.

The cylindrical portion 13L is connected to the flange portion 13 and is located outside the inner peripheral gear 115. In this example, the cylindrical portion 13C has a substantially cylindrical shape.

The cover portion 112 is a portion connected to the cylindrical portion 13C and fitted with the base 70. In this example, the outer edge of the cover portion 112 is a substantially square shape. The cover portion 112 is provided with two first engaging grooves 111A at both ends on the left and right side surfaces. Two second engaging grooves 111B are provided at both ends of the front end portion, and one second engaging groove 111B is provided at substantially the center of the rear end portion. The first engaging groove 111A engages with the first engaging plate portion 701A of the base 70. Further, the second engaging groove 111B engages with the second engaging plate portion 701B of the base 70. As a result, the case 10A and the base 70 are engaged with each other to form a housing.

Next, the internal structure of the case 10A will be described with reference to FIG. 18B. As shown in FIG. 19, a ring-shaped inner peripheral gear 115 meshing with the planetary gear 280 is formed inside the case 10A. A substantially ring-shaped corrugated portion 116 is formed on the upper portion of the inner peripheral gear 115 in a plan view. The corrugated portion 116 has a shape in which a portion having a small horizontal distance from the center of a circle passing through the center of the inner peripheral gear 115 and a portion having a large horizontal distance are alternately arranged to form a zigzag shape in a plan view. Specifically, it has a polygonal shape formed by connecting a large number of straight lines. Further, a step 117 is provided on the inner surface side surface of the flange portion 13. By providing the corrugated portion 116 and the step 117, it is possible to facilitate the positioning of other members such as the carrier 260 with internal teeth and reduce the frictional resistance.

4-1-3 <Carrier 260 with internal teeth and planetary gear 280>
Next, the carrier 260 with internal teeth and the planetary gear 280 will be described with reference to FIG. In this example, the carrier 260 with internal teeth has a substantially donut shape in a plan view. The carrier 260 with internal teeth includes a flange 262 that projects outward from the cylindrical portion 264 in a plan view.

An internal gear 261 that meshes with the pinion gear 50 is formed on the inner peripheral surface of the cylindrical portion 264. Then, the flange 262 is formed with a support shaft 263 that projects downward in the vertical direction. The number of support shafts 263 is not particularly limited, but it is particularly preferable that the number of support shafts 263 is evenly spaced. In this example, four support shafts 263 are provided as an example.

A planetary gear 280 is rotatably supported on each of the support shafts 263. The planetary gear 280 meshes with the sun gear 323, which will be described later, and the inner peripheral gear 115 provided inside the case 10A. Then, it is possible to revolve around the central portion of the internal gear 261. Therefore, the rotation of the pinion gear 50 is transmitted to the internal gear 261 to rotate the carrier with internal teeth 260, and the carrier 260 with internal teeth is rotatably supported by the support shaft 263 provided on the flange 262 of the carrier 260 with internal teeth. The rotation of the planetary gear 280 makes it possible to accelerate the rotation caused by the pinion gear 50. Further, the planetary gear 280 is provided with a step 281. Due to such a step, it is possible to avoid contact with other members.

4-1-4 <Weight holder 320 with sun gear and weight 340>
Next, the weight holder 320 with the sun gear and the weight 340 will be described with reference to FIG. The weight holder 320 with a sun gear is formed with convex portions 321 and concave portions 322 arranged alternately toward the outside of the ring-shaped ring portion 324. As shown in FIG. 14, a sun gear 323 meshing with the planetary gear 280 is provided on the outer outer peripheral surface of the ring portion 324 so that the rotation axis faces substantially perpendicular to the extending direction of the convex portion 321. Be done. A weight 340 is arranged in each recess 322. That is, it can be said that the weight holder 320 with the sun gear is a member that holds the weight 340 in each of the concave portions 322 with the convex portion 321 as a boundary when the braking device 1000 is assembled. The number of weights 340 is arbitrary, but it is preferably evenly spaced from the viewpoint of balance during rotation. In this example, eight weights 340 are used as an example. Therefore, eight convex portions 321 and eight concave portions 322 are also provided.

In this example, each weight 340 is provided with a protrusion 341 on the base 70 side. The protrusion 341 makes it possible to reduce the resistance at the time of contact with the base 70. The number of protrusions 341 is arbitrary, but in this example, four protrusions 341 are provided as an example.

Further, by providing a groove in the base 70 instead of providing the protrusion 341 in each weight 340, it is possible to reduce the resistance between the weight 340 and the base 70. For example, as shown in FIG. 15, a groove 709 (ring-shaped hatched portion in FIG. 15) having a height lower than the periphery is provided at the bottom of the base 70. Then, the weight 340 is arranged on it. At this time, even if the weight 340 is not provided with the protrusion 341, the groove 709 is provided in the base 70, so that the contact area between the weight 340 and the base 70 is reduced, thereby reducing the resistance between the weight 340 and the base 70. It becomes possible to do.

During rotation caused by the pinion gear 50, the weight 340 moves in a direction away from the center of the internal gear 261 due to centrifugal force, and abuts on the inner peripheral wall of the case 10A to provide resistance as a centrifugal brake to rotation. It is to be given. Therefore, the inner peripheral wall of the case 10A, the weight holder 320 with the sun gear, and the weight 340 can act as a resistance imparting portion.

When assembling the braking device 1000, the carrier 260 with internal teeth and the weight holder 320 with sun gears are assembled via the plate 300. Specifically, the cylindrical portion 264 of the carrier 260 with internal teeth is assembled so as to be inserted into the ring portion 324 of the weight holder 320 with a sun gear. Therefore, the diameter of the cylindrical portion 264 is designed to be slightly smaller than the diameter of the ring portion 324.

Here, the plate 300 has a function of preventing the planetary gear 280 from tilting and preventing interference between the planetary gear 280 and the weight 340. The plate 300 has a ring shape and is placed on the upper surface of the weight holder 320 with a sun gear related to the convex portion 321. Further, the upper surface of the plate 300 is substantially in contact with the lower surface of the planetary gear 280, particularly the surface surrounded by the step 281 in this example (or the interval is approximately 0 mm). The weight 340 is preferably formed as thin as possible in order to reduce the thickness of the entire braking device 1000. In particular, the thickness of the plate is preferably 0.01 to 0.2 mm, more preferably 0.05 to 0.15 mm. Also, 0.01, 0.02, 0.03, 0.04, 0.05, 0.06, 0.07, 0.08, 0.09, 0.10, 0.11, 0.12,0 It may be between any two numerical values of .13, 0.14, 0.15, 0.16, 0.17, 0.18, 0.19, 0.20 mm. Further, the plate 300 is preferably made of metal because it is formed thin, but if technically possible, the plate 300 may be formed of resin. In this case, it may be integrally formed with the sun gear 323. That is, the plate 300 is provided so as to separate the motion conversion portion and the resistance imparting portion.

4-1-5 <Base 70>
Next, the base 70 will be described with reference to FIG. As shown in FIG. 14, at substantially the center of the base 70, a cylindrical portion 708 that is bulkier than the periphery and has a recessed lower side is provided. Then, as shown in FIG. 14, a first base groove 706, a first guide wall 706A, a second base groove 707, and a second guide wall 707A are provided on the upper surface of the cylindrical portion 708.

The first base groove 706 and the first guide wall 706A correspond to the first top wall groove 16 and the first guide wall 16A provided in the case 10A, respectively. Then, the lower end of the shaft core 31 inserts the first base groove 706 and comes into contact with the first guide wall 706A formed on the edge thereof. Similarly, the second base groove 707 and the second guide wall 707A correspond to the second top wall groove 17 and the second guide wall 17A provided in the case 10A, respectively. Then, the lower end of the shaft core 41 inserts the second base groove 707 and comes into contact with the second guide wall 707A formed on the edge thereof.

The columnar portion 708 is not essential, but by providing a columnar portion 708 or the like to dent the lower side, the shaft core 31 and the lower end of the shaft core 41 become a mounting surface on which the braking device 1000 is mounted. It is possible to prevent contact and appropriately insert the shaft core 31 and the lower ends of the shaft core 41.

Further, the base 70 is provided with two first engaging plate portions 701A at both ends of the left and right side surfaces. Then, two second engaging plate portions 701B are provided at both ends of the front side surface, and one second engaging plate portion 701B is provided at substantially the center of the rear side surface. The first engaging plate portion 701A engages with the first engaging groove 111A provided in the case 10A. Further, the second engaging plate portion 701B engages with the second engaging groove 111B provided in the case 10A. As a result, the case 10A and the base 70 are engaged with each other to form a housing.

Further, on the outside of the bottom surface of the base 70, a mounting cylinder 702 used when arranging the braking device 1000 in the head box 1 of the shielding device is provided. That is, as shown in FIGS. 10, 11 and 12, by fitting the mounting cylinder 702 into the insertion hole 1a provided in the head box 1, the braking device 1000 is placed in the head box 1 without applying unnecessary pressure. It is possible to arrange it stably at. As shown in FIG. 13, the mounting cylinder 702 and the rotation center of the weight 340 are located on a straight line parallel to the longitudinal direction of the head box 1, respectively. With such a configuration, it is possible to prevent unnecessary rotation of the braking device 1000 when the code CD is moved.

Rotating members such as knurls 240, planetary gears 280, weights 340, etc. (“rotating members” in the claims) are in non-contact with the case 10A or other members housed therein when stationary or rotating. It is composed. Further, even when the braking device 1000 is separated from the bottom surface of the head box 1, it is configured to be non-contact with the case 10A or other members housed therein when it is stationary or rotating.

Next, with reference to FIGS. 19 and 20, the relative positions between the members in the assembled state will be described in more detail. FIG. 19 is a cross-sectional view taken along the line AA of FIG. 16 (c). As shown in FIG. 19, the pinion gear 50 centered on the shaft core 31 and the internal gear 261 provided on the carrier 260 with internal teeth are in mesh with each other. Further, the rotation of the internal gear 261 is configured to be transmitted to the planetary gear 280 via the support shaft 263 of the carrier 260 with internal teeth. Then, the planetary gear 280 meshes with the sun gear 323 provided on the weight holder 320 with the sun gear and the inner peripheral gear 115 provided inside the case 10A. Therefore, due to the rotation caused by the pinion gear 50, the planetary gear 280 revolves around the center of the internal gear 261 in the space formed between the sun gear 323 and the inner peripheral gear 115. It will be possible.

As shown in FIG. 20, in this example, the mounting cylinder 702 is substantially symmetrical. Then, the shaft core 31 and the shaft core 41 project from the upper end of the case 10A and the lower end of the base 70. In this example, the upper ends of the first guide wall 16A and the second guide wall 17A are substantially the same height as the upper ends of the shaft core 31 and the shaft core 41, respectively.

The knurl 240 and the roller portion 42 are located inside the slider 220. Further, the pinion gear 50 is located outside the slider 220 with the slider 220 sandwiched together with the knurl 240. Further, the pinion gear 50 and the internal gear 261 are in mesh with each other.

Then, the case 10A is covered with the aligning member 200 from the upper side to the collar portion 13. Further, the case 10A is engaged with the base 70 at the lower end thereof. A weight 340 is held on the upper part of the base 70. Here, in this example, since the weight 340 is removable, the required braking force can be adjusted according to the number or type of the weight 340. That is, when a large braking force is required, the number of weights 340 may be increased, or other higher density weights may be held in the weight holder 320 with a sun gear. On the other hand, if a small braking force is sufficient, the number of weights 340 may be reduced. From the viewpoint of stability during rotation, the weights 340 are preferably arranged symmetrically on a surface held by the weight holder 320 with a sun gear. In the present embodiment, the protrusion 341 provided on the weight 340 and the bottom surface of the base 70 come into contact with each other to reduce the resistance between the weight 340 and the base 70 during rotation.

1-2 <Operation>
Next, the operation of the braking device 1000 according to this example will be described with reference to FIG. FIG. 21A shows a state in which no tension is applied to the cord CD (steady state), and FIG. 21B shows a state in which tension is applied to the cord CD and the cord CD is sandwiched between the knurl 240 and the roller portion 42. (Pinched state), FIG. 21 (c) is a diagram summarizing the rotation directions of each member when the state changes from FIG. 21 (a) to FIG. 21 (b). 21 (a) and 21 (b) are both cross-sectional views taken along the line AA of FIG. 16 (c), as in FIG. 19. Here, for convenience of explanation, the outer circumference of the roller portion 42, which does not appear in the cross-sectional view, is displayed on the periphery of the shaft core 41, and the outer circumference of the knurl 240 is displayed on the circumference of the shaft core 31. Although the outer circumference of the knurl 240 is not strictly circular, it is approximated to a circular shape for the sake of simplicity.

As shown in FIG. 21A, in a steady state, as described above, the coil spring SP comes into contact with the inner wall behind the case 10A and presses the slider 220 forward. Therefore, the slider 220 is located in front of the case 10A. Therefore, the position is regulated by the shaft core 31 whose position is regulated by the first top wall groove 226 and the first bottom wall groove 228 of the slider 220, and by the second top wall groove 227 and the second bottom wall groove 229. The shaft core 41 and the shaft core 41 move forward together with the slider 220. Further, the first top wall groove 16 and the second top wall groove 17 provided in the case 10A held on the upper part of the slider 220 are closer to each other toward the front. Similarly, the distance between the first base groove 706 and the second base groove 707 provided in the base 70 decreases toward the front. Therefore, the distance between the roller portion 42 rotatably supported by the shaft core 41 and the knurl 240 rotatably supported by the shaft core 31 is also reduced. That is, the first top wall groove 16 and the first base groove 706 function as a regulating groove that regulates that the shaft core 31 of the knurl 240 is movably fitted and the knurl 240 does not move along the groove. Similarly, the second top wall groove 17 and the second base groove 707 serve as a regulating groove that regulates that the shaft core 41 of the roller portion 42 is movably fitted and the roller portion 42 does not move along the groove. Function. Further, since the first top wall groove 16 and the first base groove 706 are formed concentrically with the center point of the inner peripheral surface of the carrier 260 with internal teeth in a plan view, the axial core 31 moves in each groove. Even so, the pinion gear 50 can continue to mesh with the internal gear 261 provided on the carrier 260 with internal teeth.

As described above, when the distance between the knurl 240 and the roller portion 42 becomes smaller, the knurl 240 is pressed by the roller portion 42, and the code CD is sandwiched between the knurl 240 and the roller portion 42. That is, in this example, the coil spring SP also functions as an urging member that constantly urges the knurl 240 so that the knurl 240 is pressed against the roller portion 42.

Then, it is assumed that the code CD is tensioned in the direction (forward) of the arrow D1 in the braking device 1000 in the steady state. Then, the knurl 240 rotates counterclockwise and the roller portion 42 rotates clockwise due to the frictional force generated between the cord CD and the cord CD. Then, due to the rotation of the knurl 240, the pinion gear 50 that shares and is fixed to the same shaft core 31 also rotates (rotates) in the same direction (counterclockwise) as the knurl 240. At this time, as shown in FIG. 21B, the shaft core 31 and the shaft core 41 move forward in a plan view, are close to each other in the left-right direction, and sandwich the cord CD by the knurl 240 and the roller portion 42. The force of attachment becomes stronger, and the knurl 240 reliably rotates as the code CD moves. Then, since the pinion gear 50 meshes with the internal gear 261, the internal gear 261 rotates (rotates) counterclockwise due to the force applied from the teeth of the pinion gear 50. As a result, the carrier 260 with internal teeth also rotates (rotates) counterclockwise together with the internal gear 261. Therefore, the planetary gear 280 provided on the carrier 260 with internal teeth also rotates (revolves) counterclockwise. Here, since the planetary gear 280 meshes with the sun gear 323 and the inner peripheral gear 115 fixed by the case 10A, it revolves counterclockwise while rotating in the direction opposite to the revolution direction (clockwise). Will be done. Therefore, the sun gear 323 that meshes with the planetary gear 280 inside the planetary gear 280 rotates (rotates) in the opposite direction (counterclockwise) to the rotation of the planetary gear 280. At this time, the planetary gear 280 accelerates the rotation of the sun gear 323. As a result, the weight 340 held by the weight holder 320 with the sun gear that rotates together with the sun gear 323 also starts to rotate. As already described, the inner peripheral gear 115 that meshes with the planetary gear 280 on the outside of the planetary gear 280 does not rotate even when the planetary gear 280 rotates because the case 10A and the base 70 are fixed.

Then, as shown in FIG. 21B, when the knurl 240 and the roller portion 42 approach the limit (sandwiched state), the knurl 240 continues to rotate but stops moving along the internal gear 261 of the knurl 240. .. At this time, the rotation of the other members due to the rotation of the knurl 240 is continued. Then, the weight 340 comes into contact with the inner peripheral wall of the case 10A due to the centrifugal force, so that a resistance force is generated against rotation. That is, as the moving speed of the code CD increases, the rotational speed increases, which increases the centrifugal force. Then, as the centrifugal force increases, the weight 340 comes into contact with the inner peripheral wall of the case 10A more strongly, and the resistance force increases. As a result, the moving speed of the code CD (falling speed of the solar shading member) can be suppressed. Here, when the tension applied to the cord CD is substantially constant (for example, when the solar shielding member suspended so as to be able to move up and down on the cord CD on the front side of the braking device 1000 falls freely), the tension is added to the cord CD. The moving speed of the cord CD becomes substantially constant where the tension to be applied and the resistance force of the weight 340 and the inner peripheral wall of the case 10A are balanced. Therefore, the braking device 1000 functions as a rotary damper for the movement of the cord CD, and the solar radiation shielding member can be slowly lowered.

Regarding the change in the pinched state from the steady state to the pinched state described above, FIG. 21 summarizes the rotational directions of each member (for the pinion gear 50, the front-rear direction and the tightening direction in a plan view are also included). (C).

On the other hand, when tension is applied to the cord CD in the direction opposite to the arrow D1 (rearward), the knurl 240 and the roller portion 42 rotate in the opposite direction to the above. As a result, the shaft core 31 and the shaft core 41 move along the first top wall groove 16 and the second top wall groove 17 so as to be separated from each other. Then, the pinching force of the knurl 240 with respect to the cord CD is weakened, and the cord CD can be pulled with a weak force. Therefore, when the braking device 1000 is provided in the head box 1, the direction in which tension is applied to the cord CD in the front direction is the direction in which the solar radiation shielding member is lowered, and the direction in which tension is applied to the cord CD in the rear direction is the direction in which tension is applied to the cord CD. It is preferable that the member is in the rising direction.

As described above, in the braking device 1000 according to this example, when the cord and the sandwiching body move relative to each other, the sandwiching body sandwiches the cord, and when the cord and the sandwiching body move relative to each other, the cord is in a non-bent state. It can be said that the braking device is configured to change the pinched state so as to be released by. Here, the release of the cord means a state in which the cord is allowed to move, regardless of whether the cord and the sandwiching body are in contact with each other or not.

<Action / effect>
With the braking device 1000 according to this example, the following actions and effects can be obtained.
(1) Since the cord CD does not bend (non-bend) when it is freely moved, the bending resistance becomes small and the cord CD can move more smoothly.
(2) The operating force can be reduced during the pulling operation, the cord CD can be reliably sandwiched during the automatic operation (automatic descent), and an unintended fall can be prevented.
(3) When tension is applied to the cord CD forward, the knurl 240 and the roller portion 42 move so as to be close to each other, so that the cord CD can be strongly sandwiched and the knurl 240 can be reliably rotated. The rotation can be transmitted to the pinion gear 50.
(4) When tension can be applied to the cord CD backward, the knurl 240 and the roller portion 42 move so as to be separated from each other to weaken the pinching force to the cord CD and allow the cord CD to move freely. can do.
(5) The regulation groove provided in the housing (case 10A and base 70) can prevent the knurl 240 and the roller portion 42 from moving in an unintended direction.
(6) By holding the slider 220 in a floating state, the resistance force can be reduced and the wear of the member can be suppressed.
(7) Friction resistance can be reduced by providing the corrugated portion 116 and the step 117 inside the case 10A.
(8) The resistance force can be reduced by the protrusion 341 provided on the weight 340.
(9) The plate 300 can prevent the planetary gear 280 from tilting and prevent the planetary gear 280 and the weight 340 from interfering with each other.
(10) The braking device 1000 can be miniaturized by making the plate 300 thin while preventing the interference.
(11) The first guide wall 16A and the second guide wall 17A make it possible to prevent the case 10A from being scraped by the pressure from the shaft core 31 and the shaft core 41.
(12) By providing the step 51 on the pinion gear 50, the sliding resistance between the pinion gear 50 and the slider 220 can be reduced.
(13) Since the weight 340 is removable, the required braking force can be adjusted according to the number or type of the weight 340.
(14) By arranging the mechanism related to the motion conversion unit and the mechanism related to the resistance applying unit so as to be positioned substantially vertically, it is possible to reduce the area of the entire braking device 1000 in a plan view.
(15) By arranging the mechanism related to the motion conversion unit and the mechanism related to the resistance applying unit so as to be positioned substantially vertically, it is possible to reduce the area of the entire braking device 1000 in a plan view.
(16) In the braking device 1000, the angle adjusting shaft 7 arranged in the head box 1 prevents displacement in the head box 1 in a direction away from the surface (bottom surface of the head box 1) on which the braking device 1000 is installed. Therefore, there is no unnecessary pressure generated when the braking device 1000 is fixed with screws or the like, and deterioration of the performance of the braking device 1000 can be prevented.
(17) By inserting the mounting cylinder 702 into the insertion hole 1a provided on the bottom surface of the head box 1, the braking device 1000 is horizontal without unnecessary pressure generated when the braking device 1000 is fixed with screws or the like. Directional displacement can be regulated.

(Specific example related to another example)
In the above-mentioned specific example, the angle adjusting shaft 7 is implemented as the contact means, but as another example, for example, as shown in FIG. 22, the braking device 1000 is mounted on the side surface of the head box 1 instead of the angle adjusting shaft 7. The rib 7a may be provided to limit the displacement of the. When the braking device 1000 is mounted on the head box 1, it is usually preferable that the case 10A and the rib 7a of the braking device 1000 do not come into contact with each other. This is to prevent unnecessary pressure from being applied as much as possible.

In the above specific example, the bottom surface of the head box 1 is the installation surface 1c of the braking device 1000, but as shown in FIG. 23, the side surface of the head box 1 may be the installation surface 1c of the braking device 1000. Even in such a case, an insertion hole 1a is provided in the installation surface 1c related to the side surface, and the mounting cylinder 702 (projection 5b) is inserted into the insertion hole 1a for installation. Further, although not shown in consideration of visibility, it is preferable that the apex of the case 10A is locked by the angle adjusting shaft 7.

In the above-mentioned specific example, the braking device 1000 is provided so that the mechanism related to the motion conversion unit and the mechanism related to the resistance applying unit are located substantially vertically, but as shown in FIG. 24, the braking device 1000 relates to the motion conversion unit. The braking device 2000 in which the mechanism and the mechanism related to the resistance applying portion are arranged in parallel may be implemented. Further, in the braking device 2000, the headbox fixing member 7b may be separately fixed to the headbox 1, and another headbox fixing member may prevent the movement in at least one of the traveling direction and the upward direction. The head box fixing member 7b may use a stopper, a cord support, a shaft support, a box cap, a cord gate, or the like. Note that FIG. 24 shows a case where the headbox fixing member 7b is provided with a traveling direction movement restricting unit 7ba and an upward movement restricting unit 7bb to prevent movement in both the traveling direction and the upward direction. .. On the other hand, although not shown, the headbox fixing member 7b that prevents the movement in the traveling direction and the headbox fixing member 7b that prevents the movement in the upward direction may be implemented separately. Also in this alternative example, when the braking device 2000 is mounted on the head box 1, it is preferable that the braking device 2000 and the upward movement restricting unit 7bb do not normally come into contact with each other. This is to prevent unnecessary pressure from being applied as much as possible.

On the other hand, if it is a position other than the mechanism related to the resistance applying portion (centrifugal damper), for example, the position shown in FIG. 25, the upward movement restricting portion 7bb and the braking device 2000 may always be in contact with each other. ..

(Second Embodiment)
The horizontal blind according to the second embodiment is an example of a shielding device based on the above-mentioned first aspect. In the first embodiment, the protrusion 5b provided on the contact surface 5c of the damper case 5d is inserted into the insertion hole 1a provided on the installation surface 1c of the head box 1. In the second embodiment, as shown in FIG. 8, the protrusion 1b is provided on the installation surface 1c of the head box 1 instead of the protrusion 5b and the insertion hole 1a, and the insertion hole 5a is provided on the contact surface 5c of the damper case 5d. Provide. Even in such a case, the displacement in the horizontal direction (arrow W direction and arrow D direction) is regulated by inserting the protrusion 1b into the insertion hole 5a. It should be noted that in FIG. 8, the illustration inside the damper case 5d is intentionally omitted in consideration of visibility.

(Third Embodiment)
The horizontal blind according to the third embodiment is an example of a shielding device based on the second aspect described above. In the first embodiment, the protrusion 5b provided on the contact surface 5c of the damper case 5d is inserted into the insertion hole 1a provided on the installation surface 1c of the head box 1. Further, in the second embodiment, the protrusion 1b provided on the installation surface 1c of the head box 1 is inserted into the insertion hole 5a provided on the contact surface 5c of the damper case 5d. In the third embodiment, the snap-fit mechanisms 9a and 9b are provided together with or in place of the protrusions 5b and the insertion holes 1a (or the insertion holes 5a and the protrusions 1b) that regulate the displacement in the horizontal direction. The damper 5 is held by the head box 1 by the snap-fit mechanisms 9a and 9b and is stabilized.

FIG. 9 shows an example in which only the snap-fit mechanisms 9a and 9b are provided. It should be noted that in FIG. 9 , the illustration inside the damper case 5d is intentionally omitted in consideration of visibility. According to the snap fit mechanisms 9a and 9b according to this example, not only the displacement in the horizontal direction (arrow W direction and arrow D direction) is restricted, but also the vertical direction (arrow H direction) without applying pressure in the axis 21 direction. ) Displacement can also be regulated. Further, of course, there is no intention of being limited to FIG. 9 , and although not shown, snap-fit mechanisms 9a and 9b may be provided on the contact surface 5c of the damper case 5d and the installation surface 1c of the head box 1. ..
(Modification example)
The above-mentioned first to third embodiments can be implemented in the following embodiments in which they are appropriately modified.

In the first to third embodiments described above, the angle adjusting shaft 7 is adopted as the abutting means, but the present invention is not limited to this, and for example, an inner upper surface of the head box 1 or a shaft other than the angle adjusting shaft 7 is adopted as the abutting means. You may. Further, when the snap-fit mechanisms 9a and 9b are used, it is not always necessary to provide a contact means for restricting the displacement in the vertical direction from above the damper 5.

In the first to third embodiments described above, the damper 5 is arranged in the head box 1, but the accommodating portion for accommodating the damper 5 is not limited to this. That is, the damper 5 according to the present invention assumes a precise damper in which the distance between parts is small, and a housing portion is provided in a housing portion narrower than the head box 1, for example, a part of an operation rod 8. The damper 5 may be accommodated by the snap-fit mechanisms 9a, 9b and the like so that unnecessary pressure in the direction of the shaft 21 is not applied.

In the first embodiment, one protrusion 1b is inserted into one insertion hole 5a, and in the second embodiment, one protrusion 5b is inserted into one insertion hole 1a. However, the present invention is not limited to one, and two or more protrusions 1b, 5b and insertion holes 1a, 5a may be provided. In particular, if there are two or more, the rotation of the damper 5 in the installation surface can be prevented.

In the above-mentioned first to third embodiments, the number of the elevating cords 10 is a plurality of three, but one, two, or four or more may be used.

In the first to third embodiments described above, the knurling 20 is subjected to knurling, but if the contact resistance between the elevating cord 10 and the knurling 20 can be sufficiently obtained, the knurling may not be performed.

In the first to third embodiments described above, the one-way clutch 22a is used, but the one-way clutch 22a may not be provided if resistance may be applied during the raising operation of the slat 3.

In the first to third embodiments described above, the centrifugal governor 22 is adopted as the deceleration mechanism, but the knurl 20 may be configured to incorporate an oil damper. In particular, when the oil damper is constructed very densely, there is a concern that the flow path may be narrowed due to pressurization and affect the performance, and it is considered to be effective in such a case.

In the first to third embodiments described above, one damper 5 is configured to decelerate a plurality of elevating cords 10 together, but a plurality of dampers 5 may be provided for each elevating cord 10.

In the first to third embodiments described above, the present invention has been applied to a horizontal blind that raises and lowers the slats 3, but the present invention is not limited to this, and the present invention is not limited to this, and the present invention is applied to a solar shielding device such as a pleated curtain that raises and lowers a solar shielding material such as a curtain fabric. The invention may be applied.

1: Headbox, 1a: Insertion hole, 1b: Projection, 1c: Installation surface, 2: Ladder code, 3: Slat, 4: Bottom rail, 5: Damper, 5a: Insertion hole, 5b: Projection, 5c: Contact Surface, 5d: Damper case, 6: Drum, 7: Angle adjustment shaft, 7a: Rib, 7b: Headbox fixing member, 7ba: Travel direction movement control part, 7bb: Upward movement control part, 8: Operation rod, 8a : Operation part, 8b: Cord equalizer, 9a: Snap fit mechanism, 9b: Snap fit mechanism, 10: Lifting cord, 10A: Case, 11: Top wall part, 12b: Rear side wall part, 12f: Front side wall part, 12l: Left side wall, 12r: Right wall, 13: Gear, 13C: Cylindrical, 13L: Cylindrical, 16: First top wall groove, 16A: First guide wall, 17: Second top wall groove, 17A: 2nd guide wall, 19: engagement hole, 20: lauret, 21: shaft, 22: centrifugal governor, 22a: one-way clutch, 22b: planetary gear mechanism, 22c: blade, 22d: governor case, 22e: shaft, 23: Pinching slide, 24: Guide slide, 26: Shaft, 27: Insertion hole, 30: Cord catch, 31: Shaft core, 40: Idle roller, 41: Shaft core, 42: Roller part, 50: Pinion gear, 51: Step, 70: Base, 111A: 1st engaging groove, 111B: 2nd engaging groove, 112: Cover part, 113: Guide groove, 114: Support groove, 115: Inner peripheral gear, 116: Corrugated part 117: Step, 118: Groove, 119A: First side wall hole, 119B: Second side wall hole, 200: Alignment member, 201: First front groove, 201A: First front cord insertion part, 202: Second front groove, 202A: 2nd front cord insertion part, 203: 1st rear groove, 203A: 1st rear cord insertion part, 204: 2nd rear groove, 204A: 2nd rear cord insertion part, 205: front wall part, 206: rear wall part , 207: Right side wall part, 208: Left side wall part, 209: Claw part, 210: Step, 220: Cylinder, 221: Top wall part, 222: Rear side wall part, 223: Bottom wall part, 224: Front side wall part, 225: Through hole, 226: 1st top wall groove, 227: 2nd top wall groove, 228: 1st bottom wall groove, 229: 2nd bottom wall groove, 230: protrusion, 231: recess, 240: lauret, 241 : Washer, 260: Carrier with internal teeth, 261: Internal gear, 262: Flange, 263: Support shaft, 264: Cylindrical part, 280: Planetary gear, 281: Step, 300: Plate, 320: Weight holder with sun gear, 321: Convex part, 322: Concave part, 323: Sun Gear 324: Ring part, 340: Weight, 341: Protrusion, 701A: First engaging plate part, 701B: Second engaging plate part, 702: Mounting cylinder, 706: First base groove, 706A: First guide wall, 707: 2nd base groove, 707A: 2nd guide wall, 708: Cylindrical part, 709: Groove, 1000: Braking device, 1100: Self-weight drop prevention device, 2000: Braking device CD: Cord, SP: Coil spring

Claims (13)

A shielding device that allows the shielding material to be raised and lowered by pulling a tension cord.
A damper having a case, which generates resistance to an input applied by the tension cord that is driven by the lowering of its own weight of the shielding material, and adds the resistance to the tension cord by the reaction.
A head box in which the case is installed with the inner bottom surface or side surface as the installation surface,
It is provided with a contact means separate from the head box .
Said abutment means, by contact with the casing, configured to prevent displacement of the damper in a direction away from said installation surface,
Cloaking device. Inside the case, a rotation transmission mechanism that transmits rotation by using the movement of the tension cord as an input, and a centrifugal force is applied to the weight in the outer diameter direction by the transmitted rotation, and this comes into contact with the inner wall of the case. The shielding device according to claim 1, further provided with a centrifugal governor that generates the resistance. The shielding device according to claim 2, wherein the rotation transmission mechanism and the centrifugal governor are vertically configured. The shielding device according to claim 2, wherein the rotation transmission mechanism and the centrifugal governor are configured in parallel. The shielding device according to any one of claims 2 to 4 , wherein the damper includes a rotating member that rotates about an axis perpendicular to the installation surface. The shielding device according to claim 5 , wherein the rotating member is the weight in the centrifugal governor, and the shaft is a rotating shaft of a weight holder that holds the weight. The shielding device according to claim 5 , wherein the rotating member is a cord catch that sandwiches the tension cord, and the shaft is a rotating shaft of a roller that constitutes the cord catch. The shielding device according to any one of claims 5 to 7 , wherein in the damper, the rotating member is configured to rotate in close proximity to or in contact with the inner surface of the case. The shielding material is a horizontal blind slat.
The shielding device according to any one of claims 1 to 8 , wherein the contacting means is an angle adjusting shaft of the slats. Claims 2 to claim that the abutting means is a fixing member provided on the head box, and is a displacement of the damper to prevent a displacement in a direction away from the installation surface and a displacement in the installation surface direction. 8. The shielding device according to any one of 8 . The shielding device according to claim 10 , wherein the fixing member is in constant contact with the damper in a portion other than the centrifugal governor. The shielding device according to any one of claims 1 to 11 , wherein the case is provided with a protrusion, and the head box is provided with an insertion hole into which the protrusion is inserted. The shielding device according to claim 12 , wherein the damper includes a cord catch that sandwiches the tension cord, and the cord catch has a position in the lateral direction of the head box that substantially coincides with the position of the protrusion. ..