JP2017211078A - Braking device and shielding device using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a braking device capable of reducing frictional resistance between members, and a shielding device using the braking device.SOLUTION: Provided is a braking device including a case, and a rotary member included in the case and rotating with movement of a braking object; and including at least one constitution of followings (1) and (2): (1) a resistance reduction unit configured to reduce contact resistance between the rotary member and a contact member contacting with the rotary member is provided in at least a part of the rotary member or the contact member; and (2) an interposition member is interposed between the rotary member and a base in the case, and contact resistance between the interposition member and the rotary member is made smaller than contact resistance between the base and the rotary member.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a braking device and a shielding device using the same, and more particularly to a braking device that can be used to appropriately decelerate movement of a lifting / lowering cord.

  In addition to roll curtains and blinds, semi-automated shield devices that are supported by suspension, such as accordion curtains, pleated screen doors, and partitions, have been put into practical use. For example, when the horizontal blind is opened, the slat and the bottom rail as the shielding members are pulled up by pulling the operation cord. When the horizontal blind is closed, generally, the slat and the bottom rail are lowered by gravity using the weight of the slat and the bottom rail. At this time, a mechanism is known in which a braking force is applied to the lifting cord that moves as the slat and the bottom rail descend to reduce the downward momentum of the slat and the bottom rail.

  Patent Document 1 discloses a damper composed of a centrifugal governor that generates a braking force and a shaft (cord catch) connected to a brake unit, and the lifting / lowering cord contacts the outer peripheral surface of the shaft, and the lifting / lowering cord moves. The blind lifting and lowering device including the damper is disclosed in which the shaft rotates and the brake portion operates. By using this damper, it is possible to reliably provide resistance to the movement of the lifting / lowering cord accompanying the falling of its own weight.

Japanese Patent Laid-Open No. 2005-030084

  However, the damper disclosed in Patent Document 1 does not consider the frictional resistance between various members constituting the damper or other members.

  This invention is made | formed in view of such a situation, and provides the shielding apparatus using the braking device which can reduce the frictional resistance between members, and a braking device.

According to the present invention, the braking device includes a case and a rotating member that is included in the case and rotates in accordance with the movement of the braking target, and includes at least one of the following configurations (1) to (2): Is provided. (1) The resistance reduction part which reduces the contact resistance between the said rotation member and the contact member which contacts this is provided in at least one part of the said rotation member or the said contact member. (2) It has an interposed member interposed between the rotating member and the base in the case, and the contact resistance between the interposed member and the rotating member is smaller than the contact resistance between the base and the rotating member. Configured.
Hereinafter, various embodiments of the present invention will be exemplified. The embodiments described below can be combined with each other.
Preferably, the rotating member is a centrifugal extension portion that is placed on a base in the case and is applied with a centrifugal force radially outward by a rotational input from a braking target, and includes the following (1) to (2) At least one of the configurations is provided.
(1) A step is provided on at least a part of the contact surface between the centrifugal extension portion and the base.
(2) A holder that is placed on the base and holds the centrifugal expansion portion is provided, and a step is provided on at least a part of a contact surface between the holder and the base.
Preferably, the step is formed by providing a protrusion on the base-side surface of the centrifugal extension portion.
Preferably, the step is formed by providing a protrusion on a surface of the base on the centrifugal extension portion side.
Preferably, the protrusion has a substantially ring shape.
Preferably, the holder includes a holder that is placed on the placement surface and holds the centrifugal extension portion, and the holder includes a centrifugal extension portion placement surface that places the centrifugal extension portion, and the step is the holder. Is formed by providing a protrusion on the surface of the base side.
The protrusions are provided at equal intervals in the circumferential direction of the holder.
Preferably, at least three protrusions are provided.
Preferably, the holder includes a holder that is placed on the placement surface and holds the centrifugal extension portion, and the holder includes a centrifugal extension portion placement surface that places the centrifugal extension portion, and the step is the base It is formed by providing a protrusion on the surface of the centrifugal extension portion.
Preferably, the protrusion has a substantially ring shape.
Preferably, the holder includes a holder that is placed on the mounting surface and holds the centrifugal extension portion, and the holder is configured to be capable of rotating and a contact portion that contacts a side surface of the centrifugal extension portion during the rotation. The centrifugal extension portion is held by the holder so as to revolve when pressed against the contact portion by the rotation of the holder and to apply a centrifugal force radially outward of the holder.
Preferably, the centrifugal extension is moved to the outside in the radial direction of the holder by the centrifugal force, and is held by the holder so as to come into contact with the inner wall of the case.
Preferably, the rotary member is mounted on a base in the case and holds a centrifugal extension part to which a centrifugal force is applied radially outward by a rotational input from a braking target, and a centrifugal extension part holder including a sun gear A planetary gear carrier having a planetary gear meshing with the sun gear, wherein the interposition member separates at least one of the centrifugal extension holder or the planetary gear carrier and the upper surface of the base. Is provided.
Preferably, the interposition member is configured not to rotate.
Preferably, the interposition member is provided so as to be fitted into a cylindrical portion provided on the upper surface of the base.
Preferably, the interposition member is provided so as to be fixed in a state of being fitted to the cylindrical portion.
Preferably, the interposition member is a plate, and the plate is provided so as to separate the rotating member and the base.
Preferably, there is provided a shielding device comprising the braking device according to any one of the above and a shielding member that is suspended so as to be moved up and down by movement of a cord.
Preferably, the resistance reducing portion is a corrugated portion configured in a ring shape in which a portion having a small horizontal distance and a large portion from the center of the case are alternately arranged in a plan view.
Preferably, the corrugated portion is configured such that a portion having a large horizontal distance from the center contacts a part of the rotating member, and a portion having a small horizontal distance from the center does not contact the rotating member.
Preferably, steps having different heights in the vertical direction of the case are provided inside the case.
Preferably, the apparatus includes a sandwiching body that sandwiches the cord and a motion conversion unit that converts the movement of the cord into a motion of another member, and the movement of the sandwiching body is caused by the movement of the cord in one direction. It is converted into a rotational motion of the rotating member.
Preferably, when the cord relatively moves in the one direction, the cord includes a resistance applying portion that generates a resistance force with the movement of the cord, the sandwiching body includes a rotating roller, and the rotating member includes the rotating member, It is a speed increasing member that increases the rotational speed of the rotating roller accompanying the movement of the cord in one direction and transmits it to the resistance applying portion.
Preferably, the rotating member is a resistance applying unit that generates a resistance force with the movement of the cord when the cord relatively moves in one direction.
Preferably, there is provided a shielding device comprising the braking device according to any one of the above and a shielding member that is suspended so as to be moved up and down by movement of a cord.

  According to such a braking device, it is possible to reduce the contact resistance between the rotating member contained in the case and the contact member in contact with the rotating member.

It is a figure which shows an example of 100 A of shielding apparatuses which concern on one Embodiment of this invention. It is the disassembled perspective view of the braking device 1000 which concerns on one Embodiment of this invention, (a) is the figure seen from the front upper side, (b) is the figure seen from the back upper side. It is the disassembled perspective view of the braking device 1000 which concerns on one Embodiment of this invention, (a) is the figure seen from the front lower side, (b) is the figure seen from the back lower side. It is a figure showing the example which provided the groove | channel 709 in the base instead of providing the protrusion 341 in the weight 340, (a) is a top view, (b) is SS line | wire cut part sectional drawing. It is a figure showing the example which provided the protrusion 326 in the centrifugal expansion part mounting surface 325 of the weight holder 320 instead of providing the protrusion 341 in the weight 340, (a) is a perspective view, (b) is a bottom view. It is an assembly drawing of the braking device 1000 concerning one embodiment of the present invention, (a) is a front perspective view, (b) is a back perspective view, and (c) is a left side view. It is an assembly drawing of the braking device 1000 which concerns on one Embodiment of this invention, (a) is a top view, (b) is a bottom view. It is an assembly drawing which removed case 10A from braking device 1000 concerning one embodiment of the present invention, (a) is a front perspective view, and (b) is a back perspective view. FIG. 9 is an assembly view in which the slider 220 is further removed from FIG. 8, (a) is a front perspective view, and (b) is a rear perspective view. FIGS. 9A and 9B are assembled views in which the internal toothed carrier 260 is further removed from FIG. 9, wherein FIG. 9A is a front perspective view, and FIG. FIG. 4 is a cross-sectional view showing the positional relationship between the knurl 240, the slider 220, and the pinion gear 50 according to an embodiment of the present invention, and is a part of a cross-sectional view that passes through the approximate center of the shaft core 31 when viewed from the left side of the braking device 1000 is there. It is a figure showing the alignment member 200 which concerns on one Embodiment of this invention, (a) is a perspective view, (b) is a front view. It is a figure showing case 10A concerning one embodiment of the present invention, (a) is a front perspective view, and (b) is a back perspective view. It is a figure showing case 10A concerning one embodiment of the present invention, (a) is a top view and (b) is a perspective view seen from the lower side. It is a figure showing the slider 220 which concerns on one Embodiment of this invention, (a) is a front perspective view, (b) is the back perspective view seen from the lower side, (c) is a top view. It is a figure showing case 10A and slider 220 concerning one embodiment of the present invention, (a) is a perspective view seen from the lower part, and (b) is a perspective view seen from the upper part. It is an exploded perspective view showing members other than case 10A and slider 220 concerning one embodiment of the present invention. FIG. 7 is a cross-sectional view taken along line AA in FIG. It is a BB line cutting part sectional view of Drawing 7 (a). FIGS. 18A and 18B are diagrams showing a state in which the braking device 1000 of the present invention brakes the cord CD, where FIG. 18A shows a state where no tension is applied to the cord CD (steady state), and FIG. A state where the tension is applied and the cord CD is clamped by the knurling 240 and the roller unit 42 (clamping state), and (c) summarizes the rotation direction of each member when the state changes from (a) to (b). It is a figure. It is a figure showing the example which provided protrusion 709A in the base, (a) is a top view, (b) is SS line | wire cut part sectional drawing. It is a conceptual diagram which shows the positional relationship of the weight 340 and the base 70 seen from the W direction of Fig.21 (a). FIG. 6 is a partially exploded perspective view of a braking device 1000 according to a second embodiment, and is a perspective view showing a configuration in which a plate 301 is interposed between a carrier 260 with internal teeth and a weight holder with sun gear 320 and a base 70. 23 is a diagram illustrating a positional relationship among the base 70, the plate 301, and the weight 340 in the braking device 1000 in the state of FIG. 23, in which (a) is a top perspective view and (b) is a bottom view in which the base 70 is omitted. FIG. 20 is a cross-sectional view taken along line B-B corresponding to FIG. 19. It is a figure for demonstrating the other attachment position of the braking device which concerns on embodiment of this invention.

  DESCRIPTION OF EMBODIMENTS Hereinafter, preferred embodiments of a braking device according to the present invention and a solar radiation shielding device using the same will be described in detail with reference to the drawings.

<First viewpoint>
Here, the braking device according to the first aspect of the present invention is a braking device that generates sliding resistance by revolving a weight held in a case, the weight holder holding the weight, And a base on which the weight holder is placed, and a protrusion is provided on at least a part of the contact surface of the weight and the base or the contact surface of the weight holder and the base. Thereby, the contact resistance between the weight and the base or between the weight holder holding the weight and the base can be reduced.

<Second viewpoint>
A shielding device according to a second aspect of the present invention is a braking device that brakes the movement of a cord, and includes a case, a physical or virtual body that is included in the case and is vertically moved in accordance with the movement of the cord. And a rotation member that rotates about a rotation axis, and a resistance reduction unit that reduces contact resistance with the rotation member is provided inside the case. Thereby, the frictional resistance between the rotating member and the case can be reduced.

1. 1st Embodiment: 1st and 2nd viewpoint 1-1 <Overall structure>
A first embodiment of the present invention will be described with reference to the drawings. In the shielding device 100 </ b> A shown in FIG. 1, a plurality of solar radiation shielding members 101 are suspended from a hollow head box 130 via a plurality of ladder cords 123, and a bottom rail 122 is provided at the lower end of the ladder cord 123. Suspended and supported. The head box 130 includes an upper surface 131, a bottom surface 132, and side surfaces 133. And the box cap 134 is provided in the both ends. In addition, a cord outlet 135 for inserting the cord CD into the operation rod 108 is provided inside the head box 130. The configuration of the ladder cord 123 is not limited as long as it can support and rotate the solar shading member 101. For example, the ladder cord 123 includes two warp yarns separated from each other, and one warp yarn is provided on one edge of the slat. A configuration may be employed in which the other warp is attached to the other edge of the slat.

  A plurality of support members (not shown) are disposed in the head box 130, and a tilt drum (not shown) is rotatably supported by the support members. The upper end portion of the ladder cord 123 is attached to a tilt drum, and a shaft 124 (shaft member) is fitted into all the tilt drums at the center portion of the tilt drum. Therefore, when the shaft 124 is rotated, all the tilt drums are rotated, and one of the warp yarns of the ladder cord 123 is pulled up with the rotation of the tilt drum, so that each solar radiation shielding member 101 and the bottom rail 122 are The angle is adjusted in the same phase.

  An operating rod 108 made of a cylindrical body is suspended and supported at one end of the head box 130, and an operating portion 120 is provided at the lower end of the operating rod 108. When the operation bar 120 is gripped and the operation rod 108 is rotated, the angle adjustment shaft is rotated via a gear mechanism disposed in the head box 130. Therefore, the angle of each solar radiation shielding member 101 can be adjusted by rotating the operation rod 108.

  A plurality of (three in this embodiment) lifting / lowering cords 102l, 102c, and 102r (referred to simply as “lifting / lowering cord 102” when distinction is not necessary) are suspended from the head box 130. One end of 102 is attached to the bottom rail 122. A turning pulley (not shown) is pivotally supported on each support member by an axial center in the front and back directions of the drawing, and an elevating cord 102 introduced into the head box 130 can be turned and guided in the left-right direction of the head box. Each support member has a space that can pass through another lifting cord in the left-right direction. Accordingly, the other end of the right end lifting / lowering cord 102r is turned and guided by the support member, and the non-operation side lifting / lowering cords (left end and center lifting / lowering cords 102l and 102c) pass through the respective supporting members and the inside of the head box 130 through the operation rod 108. Guided in the direction. Then, after passing through the lock portion 104 and the braking device 1000 provided in the head box 130, the cylindrical operation rod 108 is inserted, and the tip thereof is connected to a cord equalizer 121 provided below the operation portion 120. Therefore, when the cord equalizer 121 is pulled downward and the lifting / lowering cord 102 is pulled out from the head box 130, the bottom rail 122 is pulled up, so that the solar radiation shielding member 101 is pulled up.

  The lock unit 104 permits or restricts the movement of the code CD by the operation of the code CD (see FIG. 6).

  The braking device 1000 brakes the movement of the code CD. The configuration and operation of the braking device 1000 will be described later. The braking device 1000 is disposed on the bottom surface 132 of the head box 130, and both ends thereof are positioned by the side surfaces 133. Note that the braking device 1000 may be disposed on another member provided on the bottom surface 132 instead of being disposed on the bottom surface 132.

  The braking device 1000 is arranged in the head box 130 such that the front side shown in FIG. 6 faces the lock unit 104 side and the rear side faces the cord outlet 135 side. Therefore, when the set of cords CD is pulled downward in the state where the solar radiation shielding member 101 has been lowered, that is, in the closed state of the shielding device 100A, the cord CD is pulled backward as shown in FIG.

  On the other hand, in the state where the solar radiation shielding member 101 is not lowered, the code CD is released in a state where the code CD is not locked by the lock unit 104. Then, the solar radiation shielding member 101 descends due to its own weight. For this reason, the lifting / lowering cord 102 is pulled out from the head box 130. Accordingly, the cord CD connected to the lifting / lowering cord 102 is pulled toward the front of the braking device 1000. Then, a braking force is applied to the code CD. Therefore, the descending speed of the solar radiation shielding member 101 is suppressed. For this reason, it is possible to suppress damage and the like caused by the descending speed of the solar radiation shielding member 101 being exceeded. This operation will be described in detail with reference to FIG.

  As described above, according to the shielding device 100A of the present embodiment, the braking device 1000 appropriately applies a braking force to the longitudinal movement of the cord CD that allows the solar radiation shielding member 101 to move up and down. For example, even if the solar radiation shielding member 101 is lowered by its own weight as described above, the descending speed of the solar radiation shielding member 101 can be suppressed.

1-2 <braking device>
Next, the braking device 1000 will be described with reference to FIGS. The braking device 1000 according to the present embodiment is a braking device that brakes the movement of the cord. Specifically, in the braking device 1000 according to the present embodiment, the mechanism relating to the motion conversion unit and the mechanism relating to the resistance applying unit are provided so as to be positioned substantially vertically. In the present embodiment, the motion conversion unit converts the movement of the code CD into the motion of another member. Further, the resistance applying unit generates a resistance force with the movement of the code CD when the code CD moves relatively in one direction. Here, in this embodiment, the idler roller 40 including the slider 220, the coil spring SP, the shaft core 41 and the roller portion 42, the knurled 240, the pinion gear 50, the shaft core 31, the washer 241, the carrier with internal teeth 260, and the planetary gear. The gear 280 forms a motion conversion unit, and the weight 340, the weight holder 320 with sun gear, and the case 10A form a resistance applying unit.

  2 and 3 are exploded perspective views of the braking device 1000 according to the present embodiment. 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 knurling 240, a pinion gear 50, a knurling 240, and a shaft core through which the pinion gear 50 is inserted. 31, a washer 241, an internal toothed carrier 260, a planetary gear 280, a plate 300, a sun geared weight holder 320, a weight 340, and a base 70.

  In the present embodiment, the idle roller 40 and the knurl 240 function as a sandwiching body that sandwiches the cord. Further, the idle roller 40 functions as a support, and the knurl 240 functions as a roller that rotates by movement of the cord in the longitudinal direction. The slider 220 holds the idle roller 40 and the knurl 240. The case 10A and the base 70 are made of, for example, resin.

  As shown in FIGS. 2 and 3, in this embodiment, four planetary gears 280 are provided on the internal toothed carrier 260, and eight weights 340 are held on the weight holder 320 with the sun gear. Hereinafter, each member will be described.

1-2-1 <Alignment member 200>
As shown in FIGS. 6 (a) and 6 (b), the alignment member 200 inserts the code CD and adjusts the direction of the code CD. A plurality of code CDs are aligned in the same direction. The alignment member 200 can be formed of a resin such as plastic, for example. Here, as shown in FIG. 6A, the directions of the arrows are front and rear, left and right, and top and bottom, respectively. That is, the direction in which the distance between the first ceiling wall groove 16 and the second ceiling wall groove 17 becomes narrow is defined as the front, and the left-right direction (width direction) and the up-down direction are determined.

  As shown in FIG. 12A, the alignment member 200 includes a front wall 205, a right side wall 207 and a left side wall 208 connected to the front wall 205, and a right side wall 207 and a left side wall 208. And a rear wall portion 206 connected to each of the rear wall portions 206. The shapes of the front wall portion 205, the right side wall portion 207, the left side wall portion 208, and the rear wall portion 206 are arbitrary, but in the present embodiment, each has a substantially rectangular shape. Moreover, in this embodiment, the front wall part 205 and the back wall part 206 are substantially symmetrical shapes.

  A first front groove 201, a first front cord insertion portion 201A, a second front groove 202, and a second front cord insertion portion 202A are formed in the front wall portion 205. The rear wall portion 206 is formed with a first rear groove 203, a first rear cord insertion portion 203A, a second rear groove 204, and a second rear cord insertion portion 204A.

  The first front cord insertion portion 201 </ b> A and the second front cord insertion portion 202 </ b> A are for inserting the cord CD into the alignment member 200 after the braking device 1000 is assembled. The first front cord insertion part 201 </ b> A is formed wider than the first front groove 201. Further, the second front cord insertion portion 202 </ b> A is formed wider than the second front groove 202. Therefore, the code CD is inserted into the first front cord insertion portion 201A and the second front cord insertion portion 202A, and the code CD is slid toward the first front groove 201 and the second front groove 202 as it is. It can be smoothly inserted.

  Further, the first rear cord insertion portion 203A and the second rear cord insertion portion 204A pass through the through holes 225 (see FIG. 15) before and after the slider 220, which will be described later, through the code CD inserted through the front wall portion 205. The cord CD is drawn out from the rear wall portion 206 to the outside. The first rear cord insertion portion 203 </ b> A is formed wider than the first rear groove 203. Further, the second rear cord insertion part 204 </ b> A is formed wider than the second rear groove 204. Therefore, the code CD is inserted into the first rear cord insertion portion 203A and the second rear cord insertion portion 204A, and the code CD is slid toward the first rear groove 203 and the second rear groove 204 as it is. It can be smoothly inserted.

  The shapes of the first front code insertion portion 201A, the second front code insertion portion 202A, the first rear code insertion portion 203A, and the second rear code insertion portion 204A are arbitrary, and are not limited to the shapes shown in FIG. For example, it may be substantially circular, and may be connected to the first front groove 201 (the same applies to other grooves) from a vertically long shape to an oblique shape. Further, in the present embodiment, a step 210 is provided between the first front cord insertion portion 201A and the first front groove 201, but this step 210 is not provided, and the front wall portion 205 (or the rear wall portion 206). May be substantially rectangular.

  As shown in FIG. 12B, in the present embodiment, the front wall portion 205 and the rear wall portion 206 have substantially the same shape when viewed from the front. Therefore, the code CD inserted from the first front code insertion section 201A passes through the first rear code insertion section 203A, and the code CD inserted from the second front code insertion section 202A passes through the second rear code insertion section 204A. To do. In other words, the first front groove 201 and the first front cord insertion portion 201A and the first rear groove 203 and the first rear cord insertion portion 203A are a pair of corresponding grooves, and the second front groove 202 and the second front cord. The insertion portion 202A, the second rear groove 204, and the second rear cord insertion portion 204A are a pair of corresponding grooves.

  Here, as shown in FIG. 12A, the case 10A, which will be described later, is disposed on the right side wall 207 of the alignment member 200 so as to be covered from above the case 10A when the brake device 1000 is assembled. A claw portion 209 for engaging with the engagement hole 19 (see FIG. 13) and fixing the alignment member 200 to the case 10A is provided. Although not shown in FIG. 12, a similar claw portion 209 is also provided on the left side wall portion 208. As a result, the two claw portions 209 provided on the alignment member 200 and the two engagement holes 19 provided on the left and right of the case 10A can be firmly engaged.

1-2-2 <Case 10A>
Next, the case 10 </ b> A will be described with reference to FIGS. 13A, 13 </ b> B, and 14. In the following description, in FIG. 14, the left direction is the front, the right direction is the rear, the upward direction is the right side, and the downward direction is the left side. The case 10A constitutes a housing together with the base 70, and includes an idler roller 40 including a slider 220, a coil spring SP, a shaft core 41 and a roller portion 42, a knurl 240, a pinion gear 50, a shaft core 31, a washer 241, The carrier 260 with internal teeth, the planetary gear 280, the plate 300, the weight holder 320 with sun gear, and the weight 340 are held.

  Further, the case 10A constitutes a casing of the braking device 1000 together with, for example, the base 70 shown in FIG. Further, for example, a resistance applying portion is configured together with the weight holder 320 with sun gear and the weight 340 shown in FIG.

  As shown in FIG. 13, the case 10 </ b> A includes a top wall part 11 having a substantially square outer shape, a front side wall part 12 f, a right side wall part 12 r and a left side wall part connected to the front side wall part 12 f and the top wall part 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 the top wall portion 11, facing the front side wall portion 12f, the rear side wall portion 12b, the front side wall portion 12f and the left side wall portion. The main portion 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 are opposed to each other in the front-rear direction. These guide grooves 113 are grooves through which the code CD is inserted in the front-rear direction. Here, the number of cords CD inserted into the guide groove 113 is not particularly limited, but the present embodiment shows an example in which three cords CD are inserted in the vertical direction (see FIG. 6).

  Further, an engagement hole 19 is provided in the right wall portion 12r and the left wall portion 12l. As already described, the engagement hole 19 engages with the claw portion 209 of the alignment member 200 to fix the alignment member 200 to the case 10A.

  Further, a support groove 114 is provided above the left and right engagement holes 19. As shown in FIG. 6, the support groove 114 supports the protrusion 230 provided on the slider 220 when the case 10 </ b> A holds the slider 220 inside. Thereby, the slider 220 can be supported in a floating state. Details will be described later.

  The top wall 11 is formed with a first ceiling wall groove 16 and a second ceiling wall groove 17. As shown in FIG. 14 (a), the first ceiling wall groove 16 and the second ceiling wall groove 17 are each formed obliquely with respect to the longitudinal direction of the cord CD, that is, the front-rear direction. The distance between the first ceiling wall groove 16 and the second ceiling wall groove 17 is reduced toward the front which is the longitudinal direction. The first ceiling wall groove 16 is formed in an arc shape, and the arc of the first ceiling wall groove 16 is concentric with the inner peripheral surface of the internal toothed carrier 260 shown in FIG. 9 in a plan view. Formed. On the other hand, the second ceiling wall groove 17 is formed in a shape having a gentle curve. Specifically, the second top wall groove 17 has a substantially linear shape on the front side, and is curved away from the first top wall groove 16 toward the rear. This is because when the second top wall groove 17 is substantially linear, the first top wall groove 16 is an arc that approaches the code CD from the rear to the front. This is to prevent the vertical displacement with respect to the code CD from being different between the shaft core 31 and the shaft core 41 when moving along the first ceiling wall groove 16 and the second ceiling wall groove 17 respectively. That is, if one is an arc and the other is substantially linear, the vertical distance to the cord CD differs in the front-rear direction. As described above, by bringing the displacement of the shaft core 31 and the shaft core 41 in the vertical direction of the code CD close to each other, the knurling 240 and the roller unit 42 can appropriately sandwich the code CD. Note that the second ceiling wall groove 17 is not limited to this, and for example, a groove having substantially the same shape as the first ceiling wall groove 16 may be curved toward the code CD side. As a result, the vertical displacement relative to the CD can be made substantially the same between the shaft core 31 and the shaft core 41, and wear of the code CD can be reduced. Here, in the present embodiment, in addition to making the displacement in the vertical direction with respect to the CD the same as possible between the shaft core 31 and the shaft core 41, the interaction due to the movement of other members and the like are taken into consideration, and FIG. The shape shown in a) was adopted.

  As shown in FIGS. 13A, 13B, and 14A, the edge of the first top wall groove 16 has an outer side of the case 10A in the first top wall groove 16 in a plan view of the case 10A. A first guide wall 16A that protrudes upward from the first ceiling wall groove 16 is provided at least at a part of the position along the edge. In the present embodiment, the first guide wall 16 </ b> A is provided so as to be approximately 90 degrees with respect to the first ceiling wall groove 16. The first guide wall 16 </ b> A is intended to reduce the surface pressure of the shaft core 31 that moves along the first ceiling wall groove 16. That is, by providing the first guide wall 16 </ b> A, an area in contact with the shaft core 31 is increased, thereby reducing the surface pressure of the shaft core 31. This is because the tension of the cord CD is applied and the surface pressure of the shaft core 31 is applied to the inner surface of the first ceiling wall groove 16 while the braking device 1000 is operating, and the first ceiling wall groove is applied by the surface pressure. This is because if the inner surface of 16 is scraped, the distance between the knurling 240 and the roller portion 42 may change, and rotation transmission to the knurling 240 may be 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 thickness of the first guide wall 16A is arbitrary, but 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 a 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 part of the position along the edge far from the center of the case 10A. A second guide wall 17A that protrudes upward from the two ceiling wall grooves 17 is provided. In the present embodiment, the second guide wall 17 </ b> A is provided so as to be approximately 90 degrees with respect to the second ceiling wall groove 17. The second guide wall 17 </ b> A is intended to reduce the surface pressure of the shaft core 41 that moves along the second ceiling wall groove 17. That is, by providing the second guide wall 17 </ b> A, an area in contact with the shaft core 41 is increased, thereby reducing the surface pressure of the shaft core 41. This is because the surface pressure of the shaft core 41 is applied to the inner surface of the second top wall groove 17 while tension is applied to the cord CD and the braking device 1000 is operating, and the second top wall groove is applied by the surface pressure. This is because if the inner surface of 17 is scraped, the distance between the knurling 240 and the roller portion 42 changes, and rotation transmission to the knurling 240 may be 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 thickness of the second guide wall 17A is arbitrary, but 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 formed of a strong material such as metal, the first guide wall 16A and the second guide wall 17A may not be provided. This is because the case 10A is solid and the case 10A is hardly scraped by the pressure from the shaft core 31 and the shaft core 41.

  The collar portion 13 is a portion that faces the top wall portion 11 and extends from the front side wall portion 12f, the rear side wall portion 12b, the right side wall portion 12r, and the left side wall portion 12l in the radial direction. It is assumed to be substantially circular.

  The cylindrical portion 13 </ b> C is connected to the flange portion 13 and is located outside the inner peripheral gear 115. In the present embodiment, the cylindrical portion 13C has a substantially cylindrical shape.

  The cover part 112 is connected to the cylindrical part 13 </ b> C and is a part that fits with the base 70. In this embodiment, the outer edge of the cover part 112 is substantially square. The cover portion 112 is provided with two first engaging grooves 111A at both ends of the left and right side surfaces. Then, two second engagement grooves 111B are provided at both ends of the front end portion, and one second engagement groove 111B is provided at substantially the center of the rear end portion. 111 A of 1st engagement grooves engage with the 1st engagement board part 701A of the base 70 shown by FIG. Further, the second engagement groove 111B is engaged with the second engagement plate portion 701B of the base 70. Thereby, case 10A and base 70 are engaged, and a housing | casing is formed.

<Second viewpoint>
Next, the internal structure of the case 10A will be described with reference to FIGS. 14B and 16A. As shown in FIG. 18, a ring-shaped inner peripheral gear 115 that meshes with the planetary gear 280 is formed inside the case 10A. As shown in FIGS. 14B and 16A, a substantially ring-shaped corrugated portion 116 is formed on the inner peripheral gear 115 in a plan view. The corrugated portion 116 has a zigzag shape in plan view, with portions having a small horizontal distance and a portion having a large horizontal distance from the center of the circle passing through the center of the inner peripheral gear 115 being alternately arranged. Specifically, it has a polygonal shape formed by connecting many straight lines. Here, in the present embodiment, a portion where the horizontal distance from the center of the circle passing through the center of the inner peripheral gear 115 is in contact with a part of the inner toothed carrier 260 and the center of the circle passing through the center of the inner peripheral gear 115 is reached. The corrugated portion 116 is configured so that a portion with a small horizontal distance from the inner distance does not contact the internal toothed carrier 260. Further, a step 117 having different heights in the vertical direction of the case 10A is provided on the inner surface of the flange 13 inside the case 10A. By providing the corrugated portion 116 and the step 117, for example, other members such as an internal toothed carrier 260 that is an example of a rotating member that rotates around a physical or virtual rotation axis in the vertical direction as the code CD moves. Positioning can be facilitated and frictional resistance can be reduced. In addition, since the internal toothed carrier 260 in this embodiment is a rotating member and includes the planetary gear 280, the rotational speed of the knurl 240 accompanying the movement of the cord CD in one direction is increased to provide resistance. It can also be said that the speed increasing member is transmitted to the portion RA. Here, the physical or virtual rotation axis is a case where the rotation axis of the rotating member is a physical axis, or a virtual axis (for example, the weight holder 320 (see FIGS. This means the case of the vertical axis passing through the center point in plan view of FIG.

  Also, as shown in FIG. 16, four grooves 118 are formed on the left and right inner surfaces of the case 10A. The groove 118 is for passing a protrusion 230 of the slider 220 described later when the brake device 1000 is assembled or disassembled. In the present embodiment, since there are four protrusions 230 of the slider 220, the four grooves 118 are also provided in the case 10A.

1-2-3 <Slider 220>
Next, the slider 220 will be described with reference to FIG. The slider 220 corresponds to a moving member that holds the idle roller 40 and the knurl 240 inside and moves together with the idle roller 40 and the knurl 240. The slider 220 includes a top wall part 221, a rear side wall part 222 and a front side wall part 224 connected to the top wall part 221, and a bottom wall part 223 connected to each of the rear side wall part 222 and the front side wall part 224. Have.

  The top wall portion 221 has a generally rectangular shape with a pair of grooves. The pair of grooves are a first ceiling wall groove 226 and a second ceiling wall groove 227, respectively. The 1st ceiling wall groove | channel 226 and the 2nd ceiling wall groove | channel 227 are made into the linear groove | channel extended along the left-right direction, respectively, and are located in a line with each other.

  The bottom wall portion 223 faces the top wall portion 221. In the present embodiment, the bottom wall portion 223 has substantially the same shape as the top wall portion 221. However, the top wall 221 and the bottom wall 223 may have different shapes. The bottom wall portion 223 is also formed with a pair of grooves formed in a straight line in the left-right direction, and the pair of grooves serves as a first bottom wall groove 228 and a second bottom wall groove 229, respectively. The first bottom wall groove 228 faces the first top wall groove 226 in the vertical direction, and the second bottom wall groove 229 faces the second top wall groove 227 in the vertical direction. Therefore, when the slider 220 is viewed in plan, the upper and lower grooves appear to overlap as shown in FIG.

  Here, the widths of the first top wall groove 226 and the first bottom wall groove 228 are large enough to accommodate the diameter of the shaft core 31. The widths of the second top wall groove 227 and the second bottom wall groove 229 are such that the shaft core 41 can be accommodated.

  In addition, the top wall 221 is provided with protrusions 230 at the four corners thereof so as to protrude to the left and right of the top wall 221. As shown in FIG. 6, the protrusion 230 is received in the support groove 114 of the case 10 </ b> A, and supports the slider 220 in a floating state inside the case 10 </ b> A. That is, the slider 220 is held in a non-contact state with the internal toothed carrier 260 positioned below.

  A through hole 225 is formed in the front side wall part 224 and the rear side wall part 222. The through-hole 225 penetrates the front side wall part 224 and the rear side wall part 222 in the front-rear direction substantially at the center in the width direction of the front side wall part 224 and the rear side wall part 222. The shape of the hole is arbitrary, but at least one cord CD can be inserted. Preferably, the shape is such that a plurality of cords CD can be inserted in a state of being aligned in the vertical direction. In the present embodiment, the shape is a substantially oval shape that is long in the vertical direction.

  Further, as shown in FIG. 15B, the rear side wall portion 222 is formed with concave portions 231 formed from the outer surface of the rear side wall portion 222 on both sides of the through hole 225. The shape of the recess 231 is arbitrary, and may be a shape cut out from the through hole 225 to the side surface as shown in FIG. 15B, or a substantially circular or substantially rectangular recess. In the present embodiment, the coil spring SP is disposed in the left recess 231, and one end of the coil spring SP projects from the recess 231. Then, when the brake device 1000 is assembled, it abuts against the inner wall of the case 10A and biases the slider 220 forward. In FIG. 15, a portion protruding from the concave portion 231 of the coil spring SP is omitted. Further, the coil spring SP may be disposed in the right recess 231. Further, the coil spring SP may be disposed in both the left and right recesses 231.

  The size of the slider 220 having such a shape in the left-right direction is substantially the same as the distance between the inner walls in the width direction of the case 10A, and the size in the front-rear direction of the slider 220 is between the inner walls in the front-rear direction of the case 10A. Be smaller than the distance. Therefore, when the slider 220 is disposed in the space of the case 10A, the side surfaces of the top wall portion 221 and the bottom wall portion 223 of the slider 220 abut against the inner wall surface in the width direction of the case 10A, and the slider 220 is attached to the case 10A. On the other hand, the movement is restricted in the width direction. In this state, the guide groove 113 of the case 10A and the through hole 225 of the slider 220 are aligned in the front-rear direction. That is, the through hole 225 is a hole for inserting the code CD into the slider 220. On the other hand, in the state where the slider 220 is disposed in the space of the case 10A, a gap is generated in the front-rear direction between the slider 220 and the inner wall surface of the case 10A, and the slider 220 moves in the front-rear direction with respect to the case 10A. be able to. Further, in a state where the slider 220 is disposed in the space of the case 10A, the coil spring SP protruding from the recess 231 of the rear side wall portion 222 of the slider 220 presses the inner wall behind the case 10A. Therefore, in a state where the slider 220 is disposed in the space of the case 10A, the slider 220 is positioned on the front side and is pressed forward in the case 10A.

  Here, the protrusion 230 of the slider 220 will be described in detail with reference to FIG. As shown in FIG. 16, when assembling the braking device 1000, the slider 220 is disposed below the inside of the case 10 </ b> A and is relatively moved in the vertical direction so that the two approach each other. Then, the protrusion 230 provided on the slider 220 is passed through the groove 118 provided inside the case 10A. In FIG. 16A, the groove 118 is emphasized to enhance visibility. Then, as shown in FIG. 6, the case 10 </ b> A and the slider 220 are brought close to each other until the protrusion 230 reaches the support groove 114. Then, the coil spring SP provided on the slider 220 comes into contact with the rear inner wall of the case 10 </ b> A and biases the slider 220 forward, so that the protrusion 230 is positioned forward of the groove 118. For this reason, once the slider 220 is attached to the case 10 </ b> A, the protrusion 230 can be prevented from being detached from the support groove 114. The groove 118 serves to pass the protrusion 230 not only when the brake device 1000 is assembled but also when it is disassembled. In this case, the slider 220 is moved rearward relative to the case 10A against the biasing force of the coil spring SP, and when the protrusion 230 reaches the position of the groove 118, the slider 220 is moved relative to the case 10A. What is necessary is just to move relatively below.

  With such a configuration, the slider 220 can be supported in a floating state inside the case 10A. Therefore, the contact between the slider 220 and other components such as the internal toothed carrier 260 can be prevented, and unnecessary resistance can be reduced or zero. Therefore, consumption of each member can be reduced.

1-2-4 <Idle Roller 40, Knurl 240 and Pinion Gear 50>
Next, the idle roller 40, the knurl 240, and the pinion gear 50 will be described with reference to FIGS.

  The idle roller 40 includes a roller portion 42 and a shaft core 41. Further, the idle roller 40 includes an axis 41 that is parallel to the axis 31 of the knurl 240 and a roller portion 42 that covers the outer peripheral surface of the axis 41. Therefore, the rotation shaft of the knurl 240 and the rotation shaft of the idle roller 40 are parallel to each other. The outer diameter of the roller portion 42 of the idle roller 40 is larger than the outer diameter of the knurl 240. The outer peripheral surface of the roller portion 42 of the idle roller 40 has a higher friction coefficient than a flat metal surface. Further, both end portions of the shaft core 41 are exposed from the roller portion 42.

  One end of the shaft core 31 is inserted in the center of the knurl 240. A pinion gear 50 is inserted into the other end of the shaft core 31. The knurled 240 can be formed of any material, and for example, stainless steel can be used.

  The idle roller 40 and the knurling 240 are held inside the slider 220. The pinion gear 50 is held outside the slider 220. Here, the positional relationship among the knurl 240, the slider 220, and the pinion gear 50 will be described with reference to FIG. FIG. 11 is a part of a cross-sectional view passing through the approximate center of the shaft core 31 as viewed from the left side of the braking device 1000 according to the present embodiment. As shown in FIG. 11, the bottom wall 223 of the slider 220 is sandwiched between the knurl 240 and the pinion gear 50 when the braking device 1000 is assembled. In the present embodiment, a step 51 is provided in the pinion gear 50 in order to reduce the contact area between the pinion gear 50 and the slider 220. Thereby, when the knurl 240 and the pinion gear 50 rotate integrally through the shaft core 31, the sliding resistance between the pinion gear 50 and the slider 220 can be reduced. Thereby, it becomes possible to make rotation operation smooth. In order to reduce the resistance, in this embodiment, the washer 241 (see FIGS. 2 and 3) is bitten on the shaft core 31 above and below the knurl 240.

1-2-5 <Internal toothed carrier 260 and planetary gear 280>
Next, the internal toothed carrier 260 and the planetary gear 280 will be described with reference to FIGS. 2 and 17. The internal toothed carrier 260 is an example of a rotating member that is contained in the case 10 </ b> A and rotates as the brake target moves. In the present embodiment, the internal toothed carrier 260 has a substantially donut shape in plan view. The internal toothed carrier 260 includes a flange 262 that protrudes outward from the cylindrical portion 264 in plan view.

  An internal gear 261 that meshes with the pinion gear 50 is formed on the inner peripheral surface inside the cylindrical portion 264. The flange 262 is formed with a support shaft 263 that protrudes downward in the vertical direction. The number of the support shafts 263 is not particularly limited, but is preferably equally spaced. In the present embodiment, as an example, four support shafts 263 are provided.

  The planetary gears 280 are rotatably supported on the support shafts 263, respectively. The planetary gear 280 meshes with a sun gear 323 described later and an inner peripheral gear 115 provided inside the case 10A. And it is possible to revolve around the center of the internal gear 261. Accordingly, the rotation of the pinion gear 50 is transmitted to the internal gear 261, so that the internal toothed carrier 260 is rotated, and accordingly, is supported rotatably on the support shaft 263 provided on the flange 262 of the internal toothed carrier 260. By rotating the planetary gear 280, the rotation caused by the pinion gear 50 can be increased. Further, the planetary gear 280 is provided with a step 281. Such a step makes it possible to avoid contact with other members.

<First viewpoint>
1-2-6 <Weight holder 320 with sun gear and weight 340>
Next, the weight holder 320 with sun gear and the weight 340 will be described with reference to FIGS. The weight 340 is an example of a centrifugal extension portion that is placed on the base 70 in the case 10A and is applied with a centrifugal force radially outward by a rotational input from a braking target. The weight holder 320 with sun gear is an example of a rotating member that is included in the case 10A and rotates with the movement of the braking target. The weight holder 320 with sun gear is formed such that convex portions 321 and concave portions 322 are alternately arranged toward the outside of the ring-shaped ring portion 324. Here, the convex portion 321 is a member that contacts the side surface of the weight 340 when the weight holder 320 with sun gear rotates. As shown in FIG. 2, a sun gear 323 that meshes with the planetary gear 280 is provided on the outer peripheral surface of the ring portion 324 so that the rotation axis is substantially perpendicular to the extending direction of the convex portion 321. It is done. A weight 340 is disposed 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 concave portion 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 preferable that the weights 340 are equally spaced from the viewpoint of balance during rotation. In the present embodiment, eight weights 340 are used as an example. Accordingly, eight convex portions 321 and eight concave portions 322 are also provided. That is, the recesses 322 are arranged at equal intervals and at equal distances from the center of rotation of the weight holder 320 with sun gear.

  In this embodiment, each weight 340 is provided with a protrusion 341 on the base 70 side. Accordingly, a step is provided on at least a part of the contact surface between the weight 340 and the base 70. Therefore, it is possible to reduce the resistance when contacting the base 70. Although the number of the protrusions 341 is arbitrary, in the present embodiment, four protrusions 341 are provided as an example.

  Further, instead of providing the protrusions 341 on each weight 340, the resistance between the weight 340 and the base 70 can be reduced by providing the protrusions 709A and B and the groove 709 on the upper side of the base 70, that is, on the weight 340 side. is there. For example, as shown in FIG. 4, a groove 709 (ring-shaped hatched portion in FIG. 4) having a lower height than the periphery is provided at the bottom of the base 70. In addition, protrusions 709A and 709B are provided around the groove 709. In the present embodiment, the protrusions 709A and 709B are ring-shaped. Instead of the ring shape, a plurality of protrusions 709A and 709B may be arranged in a ring shape. Then, the weight 340 is disposed on the protrusions 709A and B. At this time, even if the protrusion 341 is not provided on the weight 340, the contact area between the weight 340 and the base 70 is reduced by providing the protrusions 709A and B and the groove 709 on the base 70, thereby reducing the weight 340 and the base 70. It is possible to reduce the resistance.

  Moreover, it may replace with the structure of FIG. 4, and may employ | adopt the structure of FIG.21 and FIG.22. As shown in FIG. 21, a protrusion 709 </ b> A (ring-shaped hatched portion in FIG. 21) is provided on the bottom of the base 70. In the present embodiment, the protrusion 709A has a ring shape. Instead of the ring shape, a plurality of protrusions 709A may be arranged in a ring shape. Then, the weight 340 is disposed on the protrusion 709A. Here, in the example of FIGS. 21 and 22, a protrusion 341 is provided on the weight 340.

  FIG. 22 is a conceptual diagram showing the positional relationship between the weight 340 and the base 70 as viewed from the W direction in FIG. In the present embodiment, the height of the protrusion 341 provided on the weight 340 is configured to be higher than the height of the protrusion 709 </ b> A provided on the base 70. As shown in FIG. 22A, when the braking device 1000 is assembled with the protrusion 341 provided on the weight 340 facing vertically downward, four protrusions 341 provided on the weight 340 (see FIG. 17). ) Straddles the ring-shaped protrusion 709 </ b> A provided on the base 70. Then, the protrusion 341 contacts the base 70. Conversely, in the present embodiment, the protrusion 709A does not contact the weight 340. In other words, in the state of FIG. 22A, the protrusion 341 constitutes a resistance reducing unit that reduces the contact resistance between the rotating member and the contact member that contacts the rotating member. The protrusion 709A may be in contact with the weight 340. In this case, the protrusion 341 and the protrusion 709 </ b> A constitute a resistance reducing unit that reduces the contact resistance between the rotating member and the contact member that contacts the rotating member.

  On the other hand, as shown in FIG. 22B, when the braking device 1000 is assembled with the protrusion 341 provided on the weight 340 facing vertically upward, the protrusion 709A comes into contact with the weight 340. Conversely, the protrusion 341 does not contact the base 70. That is, in the state shown in FIG. 22B, the protrusion 709A constitutes a resistance reducing unit that reduces the contact resistance between the rotating member and the contact member that contacts the rotating member.

  Here, comparing FIGS. 22A and 22B, the contact resistance between the weight 340 and the base 70 is smaller in FIG. 22B. This is because the weight 340 and the base 70 are in contact at four points in FIG. 22A, whereas the weight 340 and the base 70 are in contact at one point in FIG. 22B. . That is, in FIG. 22B, the contact area between the weight 340 and the base 70 is smaller. Thereby, the magnitude | size of the contact resistance between a rotating member and the contact member which contacts this can be finely adjusted only by changing the upper and lower sides of the weight 340. For example, when two shielding devices 100A are used side by side, the descending speed of the solar radiation shielding member 101 of each shielding device 100A can be made substantially equal.

  21 and 22, the protrusion 341 of the weight 340 may be omitted. In this case, the contact mode between the weight 340 and the base 70 is always as shown in FIG.

  Further, instead of the configuration of FIGS. 2, 4, and 21, a protrusion 326 may be provided on the weight holder 320. As shown in FIG. 5, in this configuration, the centrifugal extension portion mounting surface 325 for mounting the weight 340 is provided between the convex portions 321 of the weight holder 320 or below the convex portions 321. A protrusion 326 is provided on the back side of the centrifugal extension portion mounting surface 325 constituting the weight holder 320, that is, on the base 70 side. Here, it is preferable that at least three protrusions 326 are provided so that the weight holder 320 rotates in a balanced manner. Further, the plurality of protrusions 326 are preferably provided at equal intervals in the circumferential direction of the weight holder 320. Thereby, a step is provided on at least a part of the contact surface between the weight holder 320 and the base 70.

  Furthermore, the configuration of FIG. 4 or 21 may be combined with the configuration of FIG. That is, the protrusion 341 is not provided on the weight 340, the protrusion 326 is provided on the weight holder 320 including the centrifugally extending portion placement surface 325, and the protrusions 709A and B and the groove 709 on the weight 340 side of the base 70 (example in FIG. 4). Alternatively, only the protrusion 709A (example in FIG. 21) may be provided.

  The weight 340 moves in a direction away from the center of the internal gear 261 by centrifugal force during rotation caused by the pinion gear 50, and makes contact with the inner peripheral wall of the case 10A, thereby providing resistance as a centrifugal brake against rotation. It is given. Therefore, the inner peripheral wall of the case 10 </ b> A, the weight holder 320 with sun gear, and the weight 340 can function as a resistance applying portion.

  When assembling the braking device 1000, the internal toothed carrier 260 and the sun gear weight holder 320 are assembled via the plate 300. Specifically, the cylindrical part 264 of the internal toothed carrier 260 is assembled so as to be inserted into the ring part 324 of the weight holder 320 with sun gear. Accordingly, 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 the planetary gear 280 and the weight 340 from interfering with each other. The weight 340 is preferably formed as thin as possible in order to reduce the overall thickness of the braking device 1000. Further, the plate 300 is preferably made of metal in order to be formed thin, but the plate 300 may be formed of resin if technically possible. In this case, the sun gear 323 may be integrally formed. Here, the plate 300 is not limited to the ring type as in the present embodiment, and may be a thin plate having an arbitrary shape such as a polygon, an ellipse, a rectangle, or a star as long as the same effect is obtained.

1-2-7 <Base 70>
Next, the base 70 will be described with reference to FIGS. 2, 3, 7 (b) and 17. As shown in FIG. 2 and FIG. 3, a columnar portion 708 that is higher in volume than the surroundings and is recessed on the lower side is provided at the approximate center of the base 70. 2 and 7B, 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. The lower end of the shaft core 31 passes through the first base groove 706 and abuts on the first guide wall 706A formed at 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. The lower end of the shaft core 41 passes through the second base groove 707 and comes into contact with the second guide wall 707A formed at the edge thereof.

The cylindrical portion 708 is not indispensable, but the lower ends of the shaft core 31 and the shaft core 41 can be placed on the mounting surface on which the braking device 1000 is mounted by providing the cylindrical portion 708 and so on. It is possible to prevent the contact and properly insert the lower ends of the shaft core 31 and the shaft core 41.

  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 engagement plate portions 701B are provided at both ends of the front side surface, and one second engagement plate portion 701B is provided at substantially the center of the rear side surface. The first engagement plate portion 701A is engaged with the first engagement groove 111A provided in the case 10A. The second engagement plate portion 701B is engaged with the second engagement groove 111B provided in the case 10A. Thereby, case 10A and base 70 are engaged, and a housing | casing is formed.

  Further, as shown in FIGS. 3, 7B, 17 and the like, a mounting cylinder 702 used when the braking device 1000 is disposed in the head box of the shielding device is provided outside the bottom surface of the base 70. Provided. For example, by fitting the mounting cylinder 702 to a member such as a shaft provided in the head box, the braking device 1000 can be stably disposed in the head box.

1-3 <Assembly configuration>
Next, the assembled state of these members will be described with reference to FIGS. FIG. 6 is an assembly view of a braking device 1000 configured by combining these members. As shown in FIG. 6, the external appearance of the braking device 1000 includes a casing to which the case 10 </ b> A and the base 70 are connected, and an alignment member 200 that is arranged so as to be covered from above the case 10 </ b> A. As shown in FIGS. 2 and 3, the assembly is performed in a state where the central axes of the members are overlapped in the vertical direction. Specifically, the internal gear carrier 260 and the sun gear weight holder 320 holding the weight 340 are assembled via the plate 300. At this time, the planetary gear 280 provided on the internal toothed carrier 260 and the sun gear 323 provided on the weight holder 320 with sun gear are engaged with each other.

  Then, the shaft core 31 is slid into the first top wall groove 226 and the first bottom wall groove 228 of the slider 220 while moving in the horizontal direction. At this time, the knurl 240 is positioned inside the slider 220, and the pinion gear 50 is positioned outside the slider 220. Further, the shaft 41 is slid while being moved in the horizontal direction in the second top wall groove 227 and the second bottom wall groove 229. At this time, the roller portion 42 is positioned inside the slider 220. Then, the slider 220 and the internal toothed carrier 260 are moved relative to each other so that the internal gear 261 and the pinion gear 50 provided on the internal toothed carrier 260 are engaged with each other.

  Thereafter, the base 70 is disposed below these members, and as shown in FIG. 16, the case 10A is covered from above so that the protrusion 230 of the slider 220 passes through the groove 118 of the case 10A. At this time, it is confirmed that the coil spring SP provided on the slider 220 contacts the inner peripheral wall of the case 10A, the slider 220 is urged forward, and the protrusion 230 does not fall out of the support groove 114. Then, the first side wall hole 119A and the second side wall hole 119B provided in the case 10A and the first engagement plate part 701A and the second engagement plate part 701B provided in the base 70 are engaged with each other, and the case 10A and the base 70 is fixed.

  Finally, the alignment member 200 is placed from above the casing formed of the case 10A and the base 70. And the nail | claw part 209 provided in the alignment member 200 is engaged with the engagement hole 19 provided in case 10A, and the alignment member 200 and case 10A are fixed.

  The brake device 1000 assembled in this way is shown in FIG. When the assembly of the braking device 1000 is completed, the first cord CD is disposed outside the front wall portion 205 of the alignment member 200 and above the first front groove 201. Then, the second cord CD is inserted into the first front groove 201 via the first front cord insertion portion 201A of the alignment member 200. Then, the third cord CD is inserted into the second front groove 202 via the second front cord insertion portion 202A.

  These codes CD are passed through guide grooves 113 provided on the front and rear sides of the case 10A and through holes 225 provided on the front and rear sides of the slider 220.

  Of the cords CD, the first cord CD is passed outside the rear wall 206 of the alignment member 200 and above the first rear groove 203. Then, the second cord CD is passed from the first rear groove 203 to the outside via the first rear cord insertion portion 203 </ b> A provided in the rear wall portion 206 of the alignment member 200. Then, the third cord CD is passed from the second rear groove 204 to the outside through the second rear cord insertion portion 204A. Thereby, the state shown in FIGS. 6A and 6B is obtained.

  FIG. 6C is a left side view of the braking device 1000, that is, a side view seen from the direction of the arrow X in FIG. As shown in FIG. 6C, in the braking device 1000, the case 10A, the alignment member 200, and the base 70 are visually recognized from above in a side view. It can also be seen that the protrusion 230 is supported by the support groove 114.

  As shown in FIG. 7A, the braking device 1000 can be visually recognized in the order of the case 10 </ b> A, the alignment member 200, and a part of the base 70 in order from the center. Here, as shown in FIGS. 6A, 6 </ b> B, and 7 </ b> A, the upper end of the shaft core 31 is provided in the case 10 </ b> A from the first top wall groove 226 provided in the slider 220. The first ceiling wall groove 16 is inserted and exposed to the outside of the case 10A. Similarly, the upper end of the shaft core 41 passes through the second top wall groove 17 provided in the case 10A from the second top wall groove 227 provided in the slider 220, and is exposed to the outside of the case 10A.

  Then, the first guide wall 16A provided at the edge of the first top wall groove 16 abuts the shaft core 31, and the second guide wall 17A provided at the edge of the second top wall groove 17 contacts the shaft core 41. It touches.

  Further, as shown in FIG. 7B, the base 70 has a lower end of the shaft core 31 inserted into the first base groove 706 and the shaft core 41 inserted into the second base groove 707 in the bottom view. Can be visually recognized. In addition, it is good also as a structure by which the lower end of the shaft core 31 and the shaft core 41 is covered from the exterior by covering the cylinder part 708 on the surface in which the attachment cylinder 702 is provided.

1-3-2 <Internal structure in assembled state>
Next, the internal structure in the assembled state will be described with reference to FIGS. FIG. 8 is a perspective view in a state where the alignment member 200 and the case 10A are removed from the state of FIG. As shown in FIG. 8, the shaft core 31 and the shaft core 41 protrude above the slider 220. Further, the movement of the shaft core 31 is restricted in the width direction of the slider 220 in the first ceiling wall groove 226. Similarly, the movement of the shaft core 41 is restricted in the width direction of the slider 220 in the second ceiling wall groove 227. The code CD (not shown) is inserted in the front-rear direction of the slider 220 while being vertically aligned in the through hole 225 of the slider 220.

  FIG. 9 is a perspective view in a state where the slider 220 is further removed from the state of FIG. The code CD (not shown) is inserted before and after the braking device 1000 while being sandwiched between the knurling 240 and the roller portion 42. Further, the pinion gear 50 and the internal gear 261 are engaged with each other. Therefore, when tension is applied to the cord CD, a frictional force is generated between the cord CD and the knurl 240, and when the pinion gear 50 rotates together with the knurl 240, the rotation of the pinion gear 50 causes the internal gear to rotate. 261. As a result, when the internal gear 261 rotates, the support shaft 263 provided on the flange 262 together with the internal toothed carrier 260 revolves. Accordingly, the planetary gear 280 rotatably supported by the support shaft 263 starts revolving while rotating.

  FIG. 10 is a perspective view in a state where the internal toothed carrier 260 is further removed from the state of FIG. As shown in FIG. 10, the planetary gear 280 and the sun gear 323 mesh with each other. Therefore, the rotation of the planetary gear 280 is transmitted to the sun gear 323, and the weight holder 320 with sun gear starts to rotate. As a result, as shown in FIG. 17, the weight 340 held in the concave portion 322 of the weight holder with sun gear 320 starts to rotate. When the rotational speed exceeds a certain value, the weight 340 comes into contact with the inner wall of the case 10A by centrifugal force. Thereby, a resistance force is given to the rotation of the knurl 240.

  Next, the relative positions between the members in the assembled state will be described in more detail with reference to FIGS. FIG. 18 is a cross-sectional view taken along line AA in FIG. As shown in FIG. 18, the pinion gear 50 centering on the shaft core 31 and the internal gear 261 provided on the internal toothed carrier 260 mesh with each other. The rotation of the internal gear 261 is configured to be transmitted to the planetary gear 280 via the support shaft 263 of the internal toothed carrier 260. The planetary gear 280 meshes with the sun gear 323 provided in the weight holder 320 with sun gear and the inner peripheral gear 115 provided in the case 10A. Therefore, when the rotation caused by the pinion gear 50 is applied, the planetary gear 280 can revolve in the space formed between the sun gear 323 and the inner peripheral gear 115 around the center of the inner gear 261. It becomes possible.

  FIG. 19 is a cross-sectional view taken along the line BB in FIG. As shown in FIG. 19, in the present embodiment, the cross-sectional view taken along the line BB is substantially bilaterally symmetric with respect to the mounting cylinder 702. The shaft core 31 and the shaft core 41 protrude from the upper end of the case 10 </ b> A and the lower end of the base 70. In the present embodiment, 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 knurling 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 with the knurled 240. Further, the pinion gear 50 and the internal gear 261 are engaged with each other.

  And it is covered with the alignment member 200 from the upper side of the case 10 </ b> A to the flange 13. The case 10A is engaged with the base 70 at the lower end thereof. A weight 340 is held on the upper portion of the base 70. Here, in this embodiment, since the weight 340 is detachable, the necessary braking force can be adjusted according to the number or type of weights 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 sun gear. On the other hand, if a small braking force is sufficient, the number of weights 340 may be reduced. In addition, it is preferable to arrange | position the weight 340 symmetrically on the surface hold | maintained at the weight holder 320 with a sun gear from a stability viewpoint at the time of rotation. In the present embodiment, the protrusion 341 provided on the weight 340 and the bottom surface of the base 70 are in contact with each other, thereby reducing the resistance force between the weight 340 and the base 70 during rotation.

1-4 <Operation>
Next, operation | movement of the braking device 1000 which concerns on this embodiment is demonstrated using FIG. 20A shows a state where no tension is applied to the cord CD (steady state), and FIG. 20B shows a state where the tension is applied to the cord CD, and the cord CD is sandwiched between the knurl 240 and the roller portion 42. (Clamped state), FIG. 20 (c) is a diagram summarizing the rotation direction of each member when the state changes from FIG. 20 (a) to FIG. 20 (b). 20A and 20B are both cross-sectional views taken along the line AA in FIG. 6C, as in FIG. Here, for convenience of explanation, the outer periphery of the roller portion 42 that does not appear in the cross-sectional view is displayed around the shaft core 41 and the outer periphery of the knurl 240 is displayed so as to overlap the periphery of the shaft core 31. The outer periphery of the knurl 240 is not strictly a circle, but is illustrated as being approximate to a circle for simplicity of explanation.

  As shown in FIG. 20A, in the steady state, as described above, the coil spring SP abuts against the rear inner wall of the case 10A and presses the slider 220 forward. Therefore, the slider 220 is positioned in front of the case 10A. Therefore, the position is regulated by the shaft 31 whose position is regulated by the first top wall groove 226 and the first bottom wall groove 228 of the slider 220, and the second top wall groove 227 and the second bottom wall groove 229. The shaft core 41 and the slider 220 move forward together. Furthermore, the distance between the first ceiling wall groove 16 and the second ceiling wall groove 17 provided in the case 10 </ b> A held on the upper portion of the slider 220 decreases 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. Accordingly, the distance between the roller portion 42 rotatably supported on the shaft core 41 and the knurled 240 rotatably supported on the shaft core 31 is also reduced. That is, the first ceiling wall groove 16 and the first base groove 706 function as a restriction groove that restricts the shaft 31 of the knurled 240 from being movably fitted and the knurled 240 not moving along the groove. Similarly, the 2nd ceiling wall groove | channel 17 and the 2nd base groove | channel 707 are the groove | channels which the shaft core 41 of the roller part 42 fits so that a movement is possible, and it is as a control groove which controls that the roller part 42 does not move along a groove | channel. Function. Further, since the first ceiling wall groove 16 and the first base groove 706 are formed concentrically with the center point of the inner peripheral surface of the inner toothed carrier 260 in plan view, the shaft core 31 moves in each groove. Even so, the pinion gear 50 can continue to mesh with the internal gear 261 provided on the internal toothed carrier 260.

  As described above, when the distance between the knurl 240 and the roller portion 42 becomes small, the knurl 240 is pressed by the roller portion 42, and the code CD is held between the knurl 240 and the roller portion 42. That is, in this embodiment, the coil spring SP also functions as a biasing member that constantly biases the knurled 240 so that the knurled 240 is pressed against the roller portion 42.

  Then, in the braking device 1000 in the steady state, it is assumed that a tension is applied to the cord CD in the direction of the arrow D1 (forward). Then, the knurling 240 rotates counterclockwise and the roller portion 42 rotates clockwise by the frictional force generated between the cord CD and the cord CD. Then, the rotation of the knurling 240 causes the pinion gear 50 fixed by sharing the same axis 31 to rotate (spin) in the same direction (counterclockwise) as the knurling 240. At this time, as shown in FIG. 20B, the shaft core 31 and the shaft core 41 move forward in a plan view and are close to each other in the left-right direction so that the cord CD is sandwiched between the knurling 240 and the roller portion 42. The wearing force is increased, and the knurl 240 is reliably rotated in accordance with the movement of the code CD. Then, since the pinion gear 50 meshes with the internal gear 261, the internal gear 261 rotates (rotates) counterclockwise by the force applied from the teeth of the pinion gear 50. As a result, the internal gear 261 and the internal toothed carrier 260 also rotate (revolve) counterclockwise, and the planetary gear 280 provided on the internal toothed carrier 260 likewise 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, the planetary gear 280 rotates counterclockwise while rotating in the opposite direction (clockwise) to the revolution direction. Will be. 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 rotation of the sun gear 323 is accelerated by the planetary gear 280. Thereby, the weight 340 held by the weight holder 320 with the sun gear rotating 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 outside 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. 20B, when the knurl 240 and the roller portion 42 approach the limit (clamped state), the rotation along the internal gear 261 of the knurl 240 stops although the rotation of the knurl 240 continues. . 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 10 </ b> A due to the centrifugal force, and a resistance force is generated against the rotation. That is, when the moving speed of the code CD is increased, the rotational speed is increased, thereby increasing the centrifugal force. As the centrifugal force increases, the weight 340 comes into stronger contact with the inner peripheral wall of the case 10A, and the resistance force increases. Thereby, the moving speed of the code CD (the falling speed of the solar radiation shielding member) can be suppressed. Here, when the tension applied to the cord CD is substantially constant (for example, when the solar radiation shielding member suspended so as to be lifted and lowered by the cord CD on the front side of the braking device 1000 falls freely), the tension is applied to the cord CD. The moving speed of the cord CD becomes substantially constant where the tension applied, the weight 340, and the resistance force by the inner peripheral wall of the case 10A balance. 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 lowered slowly.

  FIG. 20 summarizes the rotation direction of each member (including the front-rear direction and the tightening direction in plan view) for the change in the clamping state from the steady state to the clamping state described above. (C).

  On the other hand, when tension is applied to the cord CD in the direction opposite to the arrow D1 (backward), the knurl 240 and the roller portion 42 rotate in the direction opposite 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 clamping force of the knurl 240 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, the direction in which the tension is applied to the cord CD in the front direction in FIG. 20 is the direction in which the solar radiation shielding member is lowered, and the direction in which the tension is applied to the cord CD in the rear direction. It is preferable that the direction of rise is.

  In the present embodiment, the weight 340 is held by the weight holder 320 with sun gear, but the method of holding the weight 340 is not limited to this. For example, the weight 340 may be held by the internal toothed carrier 260. In this case, the planetary gear 280, the plate 300, and the weight holder 320 with sun gear can be omitted. By omitting the planetary gear 280, the speed increasing effect on the rotation of the sun gear 323, the weight holder with sun gear 320, and the weight 340 cannot be obtained. In such a configuration, since the internal toothed carrier 260 also has the role of the weight holder 320, the internal toothed carrier 260 resists as the code CD moves when the code CD relatively moves in one direction. It also functions as a resistance applying unit RA that generates force. Therefore, in this case, the internal toothed carrier 260 (rotating member) can be said to be a rotating member that is contained in the case 10A and rotates around a physical or virtual rotation axis in the vertical direction as the code CD moves. .

As described above, according to the first aspect, the braking device 1000 according to the present embodiment includes a case, and a rotating member that is included in the case and rotates in accordance with the movement of the braking target. A resistance reduction unit that reduces contact resistance between the rotating member and a contact member that contacts the rotating member is provided in at least a part of the rotating member or the contact member, and the rotating member is mounted on a base in the case. And a centrifugal extension part to which centrifugal force is applied radially outward by a rotational input from a braking target,
The braking device according to claim 1, comprising at least one of the following configurations (1) to (2).
(1) A step is provided on at least a part of the contact surface between the centrifugal extension portion and the base.
(2) A braking device including a holder that is placed on the placement surface and that holds the centrifugal extension portion, and a step is provided on at least a part of a contact surface between the holder and the base. Thereby, the contact resistance between the weight and the base or between the weight holder holding the weight and the base can be reduced.

 Further, according to the second aspect, the braking device 1000 according to the present embodiment includes a case, and a rotating member that is included in the case and rotates in accordance with the movement of the braking target. A resistance reduction part that reduces contact resistance between the contact member and the contact member that contacts this is provided in at least a part of the rotating member or the contact member, and the resistance reduction part is separated from the center of the case in plan view. It can be said that it is a braking device that is a corrugated portion configured in a ring-like shape in which a portion with a small horizontal distance and a portion with a large horizontal distance are alternately arranged. Thereby, the frictional resistance between the case and the other rotating member can be reduced.

<Action and effect>
With the braking device 1000 according to the present embodiment, the following operations and effects can be obtained.
(1) The contact resistance between the weight and the base or between the weight holder that holds the weight and the base can be reduced.
(2) The frictional resistance between the case and other rotating members can be reduced.
(3) Since the cord CD is not bent at the time of free movement (non-bending), the bending resistance is reduced, and the cord CD can move more smoothly.
(4) The operation force can be reduced during the pulling operation, the cord CD can be securely clamped during the automatic operation (automatic lowering), and unintentional dropping can be prevented.
(5) When tension is applied forward to the cord CD, the cord CD can be strongly clamped by moving the knurl 240 and the roller portion 42 close to each other, and the knurl 240 can be reliably rotated. The rotation can be transmitted to the pinion gear 50.
(6) When tension can be applied to the cord CD backward, the knurling 240 and the roller portion 42 move away from each other, thereby weakening the clamping force to the cord CD and allowing the cord CD to move freely. can do.
(7) The knurling 240 and the roller part 42 can be prevented from moving in an unintended direction by the restriction grooves provided in the housing (the case 10A and the base 70).
(8) By holding the slider 220 in a floating state, it is possible to reduce resistance and suppress wear of the member.
(9) By providing the corrugated portion 116 and the step 117 inside the case 10A, the frictional resistance can be reduced.
(10) Resistance can be reduced by the protrusions 341 provided on the weight 340.
(11) The plate 300 can prevent the planetary gear 280 from tilting and can prevent the planetary gear 280 and the weight 340 from interfering with each other.
(12) The brake device 1000 can be reduced in size by making the plate 300 thin while preventing the interference.
(13) The first guide wall 16A and the second guide wall 17A can prevent the case 10A from being scraped by the pressure from the shaft core 31 and the shaft core 41.
(14) Since the step 51 is provided in the pinion gear 50, the sliding resistance between the pinion gear 50 and the slider 220 can be reduced.
(15) By disposing 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 apparatus 1000 in plan view.

2. Second Embodiment Next, a second embodiment of the present invention will be described with reference to FIGS. In addition, the same code | symbol is attached | subjected to the component same as 1st Embodiment, and the description is abbreviate | omitted.

  FIG. 23 is a partially exploded perspective view of the braking device according to the second embodiment. FIG. 24 is a diagram illustrating the positional relationship of the base 70, the plate 301, and the weight 340 in the braking device 1000 in the state of FIG. 23, (a) is a top perspective view, and (b) is a bottom view with the base 70 omitted. It is. 25 is a cross-sectional view taken along line BB corresponding to FIG. 19 in the first embodiment.

  As shown in FIGS. 23 to 25, in the second embodiment, the plate 301 is interposed between the carrier with internal teeth 260 and the weight holder 320 with sun gear and the base 70. As shown in FIG. 24, in the present embodiment, the position of the plate 301 is adjusted so that the hole of the plate 301 is fitted into the cylindrical portion 708 of the base 70. That is, in 2nd Embodiment, it can be said that the plate 301 is an interposition member interposed between the rotating member (the internal toothed carrier 260 and the sun gear weight holder 320) and the base 70 in the case. In the second embodiment, the weight 340 functions as a centrifugal expansion unit that is placed on the base 70 in the case 10A and receives a centrifugal force radially outward by a rotational input from the braking target. The weight holder 320 with sun gear is an example of a centrifugal extension portion holder that holds the centrifugal extension portion and includes the sun gear 323. Further, the internal toothed carrier 260 is an example of a planetary gear carrier provided with a planetary gear 280 that meshes with the sun gear 323.

  The plate 301 is provided so as to separate the internal toothed carrier 260 and the sun gear weight holder 320 from the upper surface 710 of the base 70 (see FIGS. 23 and 24A).

  Here, in the second embodiment, when the braking device 1000 is stationary, a gap of about 0.1 mm is provided between the plate 301 and the weight holder 320 with sun gear. Further, even when the weight holder 320 with sun gear moves up and down by an external force during operation of the braking device 1000, contact between the weight holder 320 with sun gear and the upper surface 710 of the base 70 can be avoided.

  Further, the plate 301 is configured not to rotate even during movement of the braking target. In other words, the plate 301 is provided so as to be fixed in a state of being fitted to the columnar portion 708. As shown in FIG. 24, the inner peripheral line of the plate 301 is positioned so as to be in contact with the outer peripheral line of the cylindrical portion 708. Further, as shown in FIG. 24B, the outer peripheral line of the plate 301 is positioned so as to be positioned inside the circle formed by the weight 340 in the bottom view.

  As shown in FIG. 25, the plate 301 is interposed between the internal toothed carrier 260 and the sun gear weight holder 320 and the upper surface 710 of the base 70. Further, the plate 301 is not located on the lower surface of the weight 340.

  The plate 301 is preferably made of metal, and in this embodiment, is made of stainless steel. Here, in this embodiment, since the base 70 is made of resin, the contact resistance between the plate 301, the internal toothed carrier 260, and the sun gear weight holder 320 is such that the base 70, the internal toothed carrier 260, and the sun gear weight. It becomes smaller than the contact resistance of the holder 320.

  Thereby, compared with the case where the plate 301 is not provided (when at least one of the internal toothed carrier 260 or the weight holder 320 with sun gear is in contact with the upper surface 710 of the base 70), the case where the plate 301 is provided (the internal toothed carrier). 260 or at least one of the weight holders with sun gears 320 and the plate 301 are in contact with each other), the contact resistance between the members becomes smaller.

  Here, the presence of the plate 301 between the two means that the plate 301 exists between the two. In other words, the plate 301 is provided so as to separate the rotating member (the internal toothed carrier 260 or the sun gear weight holder 320) from the base 70 in the case.

  Here, the plate 301 and the plate 300 may be the same member. In this case, since it is only necessary to prepare one type of plate, management of parts becomes easy.

  As described above, the contact resistance between the rotating member and the other member can be adjusted by providing the plate 301 as necessary.

  Note that the configuration described in the second embodiment may be combined with the configurations of FIGS.

<Action and effect>
With the braking device 1000 according to the present embodiment, the following operations and effects can be obtained.
(1) In the case where the plate 301 is not provided, at least one of the internal toothed carrier 260 or the sun gear weight holder 320 is in contact with the upper surface 710 of the base 70, and contact resistance between members is generated by rotation. To do. On the other hand, the contact resistance can be reduced by providing the plate 301.
(2) In particular, the weight holder 320 with sun gear is accelerated by the planetary mechanism and has a large contact resistance with the upper surface 710 of the base 70, but this contact resistance can be reduced.
(3) The constituent members of the braking device 1000 are close to each other, and there is almost no clearance. Therefore, loads caused by slight inclinations such as the pinion gear 50 and the knurl 240 are transmitted to the internal toothed carrier 260 and the sun gear weight holder 320. Then, due to such a load, the contact resistance between the internal toothed carrier 260 and the sun gear weight holder 320 and the upper surface 710 of the base 70 may increase, and the braking device 1000 may malfunction. On the other hand, the provision of the plate 301 makes it possible to reduce such malfunctions.

  Although various embodiments have been described above, the shielding device 100A of the present invention may have a different configuration from the shielding device 100A of the above-described embodiment. For example, the solar radiation shielding device of the present invention may be a roll curtain around which a curtain cloth is wound, or a blind in which a plurality of slats are moved up and down. Further, as shown in FIG. 26, the braking device 1000 may be fixed to the window frame 110 using a screw 111 or the like. Further, the braking device 1000 may be provided inside the grip 109. Furthermore, it is good also as providing the braking device 1000 in the arbitrary places of the passage route of the raising / lowering cord 102. FIG.

  As described above, according to the present invention, a braking device capable of reducing frictional resistance between members and a shielding device using the braking device are provided, and deterioration of the members can be prevented.

  10A: Case, 31, 41: Axle, 50: Pinion gear, 70: Base, 200: Alignment member, 220: Slider, 240: Knurl, 260: Carrier with internal teeth, 280: Planetary gear, 300, 301: Plate 320: Weight holder with sun gear, 340: Weight

Claims (25)

Case and
A rotating member included in the case and rotated in accordance with the movement of the braking target,
A braking device comprising at least one of the following configurations (1) to (2).
(1) The resistance reduction part which reduces the contact resistance between the said rotation member and the contact member which contacts this is provided in at least one part of the said rotation member or the said contact member.
(2) It has an interposed member interposed between the rotating member and the base in the case, and the contact resistance between the interposed member and the rotating member is smaller than the contact resistance between the base and the rotating member. Configured. The rotating member is a centrifugal extension portion that is placed on the base in the case and is applied with a centrifugal force radially outward by a rotational input from a braking target,
The braking device according to claim 1, comprising at least one of the following configurations (1) to (2).
(1) A step is provided on at least a part of the contact surface between the centrifugal extension portion and the base.
(2) A holder that is placed on the base and holds the centrifugal expansion portion is provided, and a step is provided on at least a part of a contact surface between the holder and the base. The step is formed by providing a protrusion on the base-side surface of the centrifugal extension portion.
The braking device according to claim 2. The step is formed by providing a protrusion on the surface of the base on the centrifugal extension portion side.
The braking device according to claim 2 or claim 3. The protrusion has a substantially ring shape.
The braking device according to claim 4. A holder mounted on the mounting surface and holding the centrifugal extension part;
The holder includes a centrifugal extension part mounting surface for mounting the centrifugal extension part,
The step is formed by providing a protrusion on the base-side surface of the holder.
The braking device according to claim 2. The protrusions are provided at equal intervals in the circumferential direction of the holder.
The braking device according to claim 6. At least three of the protrusions are provided.
The braking device according to claim 7. A holder mounted on the mounting surface and holding the centrifugal extension part;
The holder includes a centrifugal extension part mounting surface for mounting the centrifugal extension part,
The step is formed by providing a protrusion on the surface of the base on the centrifugal extension portion side.
The braking device according to claim 2. The protrusion has a substantially ring shape.
The braking device according to claim 9. A holder mounted on the mounting surface and holding the centrifugal extension part;
The holder is configured to be capable of rotating, and includes a contact portion that contacts a side surface of the centrifugal extension portion during the rotation, and the centrifugal extension portion is pressed against the contact portion by the rotation of the holder. Revolved and held by the holder so that a centrifugal force is applied to the outside in the radial direction of the holder,
The braking device according to any one of claims 1 to 10. The centrifugal extension portion moves radially outward of the holder by the centrifugal force, and is held by the holder so as to come into contact with the inner wall of the case.
The braking device according to claim 11. The rotating member is
A centrifugal extension part holder mounted on the base in the case and holding a centrifugal extension part to which a centrifugal force is applied radially outward by a rotational input from a braking target and having a sun gear meshes with the sun gear. A planetary gear carrier with planetary gears,
The interposition member is provided so as to separate at least one of the centrifugal extension portion holder or the planetary gear carrier and the upper surface of the base.
The braking device according to any one of claims 1 to 12. The interposition member is configured not to rotate.
The braking device according to any one of claims 1 to 13. The interposition member is provided so as to be fitted to a cylindrical portion provided on the upper surface of the base.
The braking device according to any one of claims 1 to 14. The interposition member is provided so as to be fixed in a state of being fitted to the cylindrical portion.
The braking device according to any one of claims 1 to 15. The interposition member is a plate;
The plate is provided to separate the rotating member and the base;
The braking device according to any one of claims 1 to 16. A braking device according to any one of claims 1 to 17,
A shielding member that can be lifted and lowered by movement of the cord;
A shielding device comprising: The resistance reduction unit is a waveform unit configured in a ring shape having a waveform in which horizontal portions from a center of the case are small and large portions are alternately arranged in plan view.
The braking device according to claim 1. The corrugated portion is configured such that a portion with a large horizontal distance from the center contacts a part of the rotating member, and a portion with a small horizontal distance from the center does not contact the rotating member.
The braking device according to claim 19. Steps with different heights in the vertical direction of the case are provided inside the case.
The braking device according to claim 19 or 20. Comprising a sandwiching body for sandwiching a cord, and a motion converting section for converting the movement of the cord into the motion of another member;
The movement of the sandwiched body is converted into the rotational movement of the rotating member as the cord moves in one direction.
The braking device according to any one of claims 19 to 21. When the cord relatively moves in the one direction, a resistance applying unit that generates a resistance force along with the movement of the cord includes the pinching body including a rotation roller,
The rotating member is a speed increasing member that increases the rotational speed of the rotating roller accompanying the movement of the cord in one direction and transmits the speed to the resistance applying unit.
The braking device according to claim 22. The rotating member is a resistance applying unit that generates a resistance force with the movement of the cord when the cord is relatively moved in one direction.
The braking device according to claim 22. A braking device according to any one of claims 19 to 24,
A shielding member that can be lifted and lowered by movement of the cord;
A shielding device comprising: