JP2017210863A - Shielding device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a shielding device that comprises a brake unit capable of adjusting a braking force for each product.SOLUTION: A shielding device 100A is configured so that a shield material 101 can be moved by pulling a tension cord 102. The shielding device comprises a brake unit 1000 which generates resistance to input applied by the tension cord 102 driven in association with movement of the shield material 101 and which applies the resistance to the tension cord 102 by reaction thereto. The brake unit 1000 comprises a rotational resistor. A resistance force is generated by rotating the rotational resistor, and the number of the rotational resistors or the type of the rotational resistor can be changed.SELECTED DRAWING: Figure 1A

Description

  The present invention relates to a shielding device.

  Shielding devices such as roll curtains, blinds, accordion curtains, pleated screens, and partitions are in practical use. For example, if the shielding device is a horizontal blind, when it is opened, the slat and the bottom rail, which are 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 move (particularly, due to its own weight drop), thereby reducing the downward momentum of the slat and the bottom rail. Of course, such a movement is not limited to the weight drop. For example, an automatic climb is applied to a roll curtain, and an automatic lateral movement is applied to an accordion curtain.

  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 movement of the shielding material.

Japanese Patent Laid-Open No. 2005-030084

  However, the desired braking force varies depending on the type and size of the shielding device (hereinafter referred to as a product). Therefore, when the same damper is used for different products, the moving speed of the shielding material differs for each product. On the other hand, when it is desired to realize a different braking force for each product, different dampers are required, and as a result, an increase in the number of parts and an increase in cost become problems. In addition, even in the case of the same product, there may be a case where fine adjustment of the braking force is necessary, or a case where the desired braking force changes depending on use and aging.

  This invention is made | formed in view of such a situation, and provides the shielding apparatus provided with the braking device which can adjust braking force for every product.

  According to a first aspect of the present invention, there is provided a shielding device configured to be able to move a shielding material by pulling a tension cord, and to an input applied by the tension cord driven by the movement of the shielding material. A braking device that generates resistance and applies the resistance to the tensile cord by its reaction; the braking device includes a rotation resistor, and generates a resistance force by rotating the rotation resistor; the number of the rotation resistors Or the shielding apparatus comprised so that a kind can be changed is provided.

  According to the second aspect of the present invention, to the shielding device configured to be able to move the shielding material by pulling the tension cord, the input applied by the tension cord driven by the movement of the shielding material. When a braking device for generating resistance and applying the resistance to the tensile cord by its reaction is provided, the rotating resistor is provided in the braking device, and is a rotating resistor that generates a resistance force by rotating. A method for manufacturing a shielding device is provided, wherein the number or type of the shielding device is changed depending on the shielding device.

  According to such a shielding device, it is possible to adjust the braking force according to the product and the state by making the number or type of the rotating resistors variable.

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

  Preferably, the braking device is detachably accommodated in the head box.

  Preferably, a rotation resistor holder for detachably holding the rotation resistor is provided in the case, and the rotation resistor revolves with the rotation of the rotation resistor holder.

  Preferably, the case includes a lower case that houses the rotation resistor and the rotation resistor holder, and an upper case that shields the lower case, and the upper case is configured to be detachable from the lower case. Is done.

  Preferably, the upper case is configured to be detachable from the lower case by screwing or a snap-fit mechanism.

  Preferably, the case includes a lower case that houses the rotation resistor and the rotation resistor holder, and an upper case that shields the lower case, and is configured to be able to open and close the lower case.

  Preferably, the rotation resistor holder includes a mounting portion on which the rotation resistor is mounted.

  Preferably, the rotation resistor holder further includes a contact portion that contacts a side surface of the rotation resistor during the rotation, and the rotation resistor is brought into contact with the contact portion by the rotation of the rotation resistor holder. It revolves by being pressed and moves to the outer periphery side of the revolution by its centrifugal force, and generates the braking force by friction with the inner wall of the case, which depends on the number or type of the rotating resistors Configured to be adjustable.

  Preferably, there are a plurality of placement units, and one placement unit is configured such that one rotation resistor can be placed.

  Preferably, there are a plurality of the placement units, which are arranged on a circumference related to the revolution of the rotation resistor, and are arranged at equal intervals in the circumferential direction and at an equal distance from the rotation center of the rotation resistor holder. Is done.

  Preferably, the number of the placement units is 2 to 16.

  Preferably, the number of the placement units is four.

  Preferably, the number of the placement units is eight.

  Preferably, the mounting portion is substantially equal to the shape of the rotating resistor.

  Preferably, the number of the rotating resistors placed on the placement unit is 2 to 16.

  Preferably, a plurality of the rotation resistors are arranged on the circumference, and each of them is arranged at equal intervals in the circumferential direction and equidistant from the rotation center of the rotation resistor holder.

  Preferably, the shielding device is a blind device.

It is a figure which shows an example of the shielding apparatus 100 which concerns on embodiment of this invention. It is a figure which shows an example of the shielding apparatus 100 which concerns on embodiment of this invention. It is a figure which shows an example of the shielding apparatus 100 which concerns on embodiment of this invention. It is the disassembled perspective view of the braking device 1000 which concerns on this 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 this 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 an assembly drawing of the braking device 1000 which concerns on this embodiment of this invention, (a) is a front perspective view, (b) is a back perspective view, (c) is a left view. It is an assembly drawing of the braking device 1000 which concerns on this 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 this embodiment of the present invention, (a) is a front perspective view, and (b) is a back perspective view. FIG. 8 is an assembly view in which the slider 220 is further removed from FIG. 7, (a) is a front perspective view, and (b) is a rear perspective view. FIG. 9 is an assembly view in which the internal toothed carrier 260 is further removed from FIG. 8, (a) is a front perspective view, and (b) is a rear perspective view. 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 the present embodiment of the present invention, and is a part of a cross-sectional view passing through the approximate center of the shaft core 31 when viewed from the left side surface of the braking device 1000. is there. It is a figure showing the alignment member 200 which concerns on this embodiment of this invention, (a) is a perspective view, (b) is a front view. It is a figure showing case 10A concerning this 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 this 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 this 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 this 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 this embodiment of the present invention. FIG. 6 is a cross-sectional view taken along line AA in FIG. FIG. 7 is a cross-sectional view taken along the line BB in FIG. FIGS. 17A and 17B are diagrams showing how the braking device 1000 of the present invention brakes the cord CD, where FIG. 17A shows a state where no tension is applied to the cord CD (steady state), and FIG. 17B shows the cord CD. 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. In the weight holder with sun gear 320 according to the embodiment of the present invention, the number of weights 340 to be held is varied. It is a figure for demonstrating the other attachment position of the braking device which concerns on embodiment of this invention. It is the schematic which shows the braking device 2000 which concerns on a modification. It is the schematic which shows the braking device 3000 which concerns on a modification. It is the schematic which shows the holder 320c which can hold | maintain the wind-cut blade | wing 340c as a modification instead of the weight holder 320 with a sun gear which concerns on embodiment of this invention. The case where there are two sizes of the weight 340 according to the embodiment of the present invention is shown. An example of a weight holder 320a according to the prior art that can hold only one weight 340 is shown.

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

1. Embodiment 1-1 <Overall Configuration>
1A to 1C are diagrams illustrating a shielding device 100 according to the present embodiment.
The shielding device 100 shown in FIG. 1A is a horizontal blind (an example only), and a plurality of solar radiation shielding members (slats) 101 are supported by being suspended from a hollow head box 130 via a plurality of ladder cords 123. A bottom rail 122 is suspended and supported at the lower end of the ladder cord 123. 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 ladder cord 123 is one form of a “sunlight shielding member support cord”. The configuration of the “sunlight shielding member support cord” is not limited as long as it can support and rotate the sunscreen member 101. For example, the cord is provided with two warp threads separated from each other, and one warp thread is a slat. The configuration may be such that it is attached to one edge and 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 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. At this time, as shown in FIG. 1B, a mounting portion (mounting cylinder 702) for fixing the arrangement in the head box 130 is provided on the bottom surface of the braking device 1000 (outside the bottom surface of the base 70). An attachment cylinder 702 is attached to an attachment recess 136 provided on the bottom surface of the box 130. As a result, the braking device 1000 can be stably arranged in the head box 130.

  Further, as shown in FIG. 1B, the braking device 1000 is disposed so as to be sandwiched between the mounting surface in the head box 130 and the shaft 124. That is, the roller (knurl 240 described later) is configured to be movable in the horizontal direction in the head box 130, and the number of code CDs from the side where the number of code CDs existing in the head box 130 is large (the right side in FIG. 1A). The braking device 1000 is arranged in the head box 130 so that the second position is shifted to the first position toward the side with less (right side in FIG. 1A). Further, the braking device 1000 is arranged so that the rotation axis of the planetary gear 280 is oriented in the vertical direction in the head box 130. Further, the lock unit 104 is disposed in front of the braking device 1000.

  FIG. 1B is a partially enlarged view of region Z in FIG. 1A (a). As shown in FIGS. 1B and 1C, the cord CD is guided to the lock portion 104 in a state of being aligned horizontally, then twisted and guided to the braking device 1000 in a state of being aligned in a vertical direction. Then, after being output from the braking device 1000, it is aligned obliquely and guided to the cord outlet 135.

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. Here, in this embodiment, as shown in FIG. 2, an idle roller 40 including a slider 220, a coil spring SP, a shaft core 41 and a roller portion 42, a knurled 240, a pinion gear 50, a shaft core 31, and a washer 241. The inner toothed carrier 260 and the planetary gear 280 constitute a motion conversion unit, and includes a weight 340 (an example of a “rotation resistor” in the claims), a sun gear weight holder 320 (a “rotation” in the claims) An example of “resistor holder” and the case 10 </ b> A constitute a resistance applying portion.

  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.

  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. 5A and 5B, the alignment member 200 is for inserting the code CD and adjusting 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. 5A, 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 shown in FIG. 6 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. 11A, 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. 14) before and after the slider 220, which will be described later, through the cord 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.

  Note that 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. 11B, 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 (not shown in FIG. 11) inserted from the first front code insertion part 201A passes through the first rear code insertion part 203A, and the code CD inserted from the second front code insertion part 202A is the first code CD. 2 Passes through the rear cord insertion portion 204A. 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. 11A, the right side wall portion 207 of the alignment member 200 is arranged so as to be covered from above the case 10A when the braking device 1000 (not shown in FIG. 11) is assembled. When this is done, a claw portion 209 is provided for engaging with an engagement hole 19 (see FIG. 12) of the case 10A described later and fixing the alignment member 200 to the case 10A. Although not shown in FIG. 11, a similar claw portion 209 is also provided on the left side wall portion 208. Thus, the two claw portions 209 provided in the alignment member 200 and the two engagement holes 19 provided on the left and right sides of the case 10A can be firmly engaged (so-called snap fit). It may be screwed.

1-2-2 <Case 10A>
Next, the case 10A will be described with reference to FIGS. 12 (a), 12 (b) and FIG. In the following description, in FIG. 13, 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 casing together with a base 70 (see FIG. 16 and the like), and an idle roller 40 and a knurl 240 including a slider 220, a coil spring SP, a shaft core 41 and a roller portion 42 shown in FIG. The pinion gear 50, the shaft core 31, the washer 241, the internal gear carrier 260, the planetary gear 280, the plate 300, the sun gear weight holder 320 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, the 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. 12, 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 part 12b connected to each of the right side wall part 12r and the left side wall part 12l, and the top wall part 11, facing the front side wall part 12f, the rear side wall part 12b, the right side wall part 12r and the left side wall part. 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. 5).

  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. 5, 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.

  As shown in FIG. 12, a first ceiling wall groove 16 and a second ceiling wall groove 17 are formed in the ceiling wall portion 11. As shown in FIG. 13 (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. 8 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, etc. is taken into consideration, and FIG. The shape shown in a) was adopted.

  As shown in FIGS. 12A, 12B, and 13A, 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 13L 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.

  According to the above configuration, the case 10A (an example of the “upper case” in the claims) and the base 70 (an example of the “lower case” in the claims) are engaged to form a casing. . This is a so-called snap fit, but it may be screwed. With such a configuration, in order to obtain a desired braking force in the braking device 1000 or to adjust the braking force, the number of weights 340 placed on the weight holder 320 with sun gear can be changed.

  Next, the internal structure of the case 10A will be described with reference to FIGS. As shown in FIG. 17, a ring-shaped inner peripheral gear 115 that meshes with the planetary gear 280 is formed inside the case 10 </ b> A. 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. Further, a step 117 is provided on the inner surface of the flange 13. By providing the corrugated portion 116 and the step 117, positioning of other members such as the internal toothed carrier 260 can be facilitated and the frictional resistance can be reduced.

  Also, as shown in FIG. 15, 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. 5, 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. 14B, 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. 14B, or may be 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. 14, a portion protruding from the recess 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. 15, 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. 15A, the groove 118 is emphasized to enhance visibility. Then, as shown in FIG. 5, 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. 10 is a part of a cross-sectional view passing through the approximate center of the shaft core 31 when viewed from the left side of the braking device 1000 according to the present embodiment. As shown in FIG. 10, 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 resistance, in this embodiment, a washer 241 (see FIGS. 2 and 3) is bitten on the shaft core 31 below the pinion gear 50.

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 16. 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.

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 holder 320 with sun gear is directed outward from the ring-shaped ring portion 324 by a convex portion 321 (an example of a “contact portion” in the claims) and a concave portion 322 (“placement in the claims”). An example of “parts” is formed alternately. 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 as long as it is plural, 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. Such protrusions 341 can 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.

  In addition, by providing a groove in the base 70 instead of providing the protrusion 341 on each weight 340, the resistance between the weight 340 and the base 70 can be reduced. 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. And the weight 340 is arrange | positioned on it. At this time, even if the protrusion 341 is not provided on the weight 340, the groove 709 is provided on the base 70, thereby reducing the contact area between the weight 340 and the base 70, thereby reducing the resistance between the weight 340 and the base 70. It becomes possible to do.

  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.

  Since the weight 340 according to this embodiment is configured separately from the weight holder 320 with sun gear, the number of the recesses 322 and the weights 340 in the weight holder 320 with sun gear do not necessarily match. In other words, the number of the concave portions 322 in the weight holder 320 with sun gear is eight in this embodiment, but it is not necessary to place the weights 340 in all the eight concave portions 322, and changes according to each product, use, and aging. The number of weights 340 can be adjusted according to the desired braking force. Furthermore, since it is configured to be detachable, the braking force can be adjusted by changing the type of the weight 340 (including the material / material, size, friction coefficient, etc.). For example, if attention is paid to the material of the weight 340, for example, the weight 340 may be made of lead or resin. The braking force can be adjusted by arbitrarily selecting and combining these. However, it is only an example and is not limited to this. Further, if attention is paid to the size of the weight 340, the normal size weight 340 shown in FIG. 25 (a) (for the sake of convenience, displayed as weight 340a) and the normal half shown in FIG. 25 (b). A size weight 340b may be used. The braking force can be adjusted by arbitrarily selecting and combining these. In this example, the weight 340b is formed so as to occupy a half of the region radially outward from the weight 340a, and there is no useless movement in the region of the recess 322 in the weight holder 320 with the sun gear when used. It has become. Of course, the present invention is not limited to this, and although not shown, it may be formed so as to occupy half of the radially inner region, or three or more types of weights 340 may be prepared. Furthermore, one weight 340 may not be configured to be placed in one recess 322, and a plurality of weights 340 may be placed in one recess 322.

  An example is shown in FIGS. 20A to 20D and FIG. FIG. 26 shows an example of a weight holder 320a that can hold only one weight, and a weight 340 is placed on the weight holder 320a. When such a weight holder 320a is used, the braking force cannot be adjusted by the number of weights 340. On the other hand, FIGS. 20A to 20D show the case where the number of the weight holder 340 with the sun gear according to the present embodiment and the weight 340 placed on the concave portion 322 is changed, that is, two, three, The case where it is set to 4 pieces and 8 pieces is shown. In any case, the concave portions 322 are arranged at equal intervals and at equal distances from the center of rotation of the weight holder 320 with sun gear, so that the weight holders 320 with sun gear are equally spaced from the viewpoint of balance during rotation. It is possible to arrange in. It should also be noted that the recess 322 is substantially the same as the shape of the weight 340 as shown. In this example, the concave portion 322 has a substantially trapezoidal shape or a substantially partial annular shape in accordance with the weight 340.

  That is, when the braking device 1000 is provided for the shielding device including the shielding device 100, the number or type of weights 340 is changed depending on the shielding device.

  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 plate 300 has a ring shape and is placed on the upper surface of the convex portion 321 of the weight holder 320 with sun gear. Further, the upper surface of the plate 300 is substantially in contact with (or spaced from) the lower surface of the planetary gear 280, particularly a surface defined by the step 281 in this embodiment (an example of an “contact surface” in the claims). Is approximately 0 mm). The weight 340 is preferably formed as thin as possible in order to reduce the overall thickness of the braking device 1000. In particular, the thickness of the plate is preferably 0.01 to 0.2 millimeters, and more preferably 0.05 to 0.15 millimeters. 0.01, 0.02, 0.03, 0.04, 0.05, 0.06, 0.07, 0.08, 0.09, 0.10, 0.11, 0.12, 0 .13, 0.14, 0.15, 0.16, 0.17, 0.18, 0.19, or 0.20 millimeters may be used. 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. That is, the plate 300 is provided so as to separate the motion conversion unit and the resistance applying unit.

1-2-7 <Base 70>
Next, the base 70 will be described with reference to FIGS. 2, 3, 6 (b), and 16. 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. As shown in FIGS. 2 and 6B, 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, 6B, 16 and the like, a mounting cylinder 702 used when placing the braking device 1000 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. 5 is an assembly diagram of a braking device 1000 configured by combining these members. As shown in FIG. 5, the external appearance of the braking device 1000 includes a housing to which the case 10 </ b> A and the base 70 are connected, and an alignment member 200 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.

  After that, the base 70 is disposed below these members, and as shown in FIG. 15, 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.

  FIG. 5 shows a braking device 1000 assembled in this way. 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. As a result, the state shown in FIGS. 5A and 5B is obtained.

  FIG.5 (c) is the left view of the braking device 1000, ie, the side view seen from the arrow X direction of Fig.5 (a). As shown in FIG. 5C, in the braking device 1000, the case 10A, the alignment member 200, and the base 70 are visually recognized from the upper side in a side view. It can also be seen that the protrusion 230 is supported by the support groove 114.

  As shown in FIG. 6A, 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. 5A, 5 </ b> B, and 6 </ 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. 6B, the base 70 has a lower end of the shaft core 31 inserted through the first base groove 706 and the shaft core 41 inserted through 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. 7 is a perspective view in a state in which the alignment member 200 and the case 10A are removed from the state of FIG. As shown in FIG. 7, 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. 8 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. 9 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. 9, 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. 16, the weight 340 held in the recess 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. 17 and 18. FIG. 17 is a cross-sectional view taken along line AA in FIG. As shown in FIG. 17, 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. 18 is a cross-sectional view taken along line BB in FIG. As shown in FIG. 18, in the present embodiment, the cross-sectional view taken along the line BB is substantially bilaterally symmetric about 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. FIG. 19A shows a state in which no tension is applied to the cord CD (steady state), and FIG. 19B shows a state in which the cord CD is tensioned, and the cord CD is sandwiched between the knurling 240 and the roller portion 42. (Clamped state), FIG. 19 (c) is a diagram summarizing the rotation direction of each member when the state changes from FIG. 19 (a) to FIG. 19 (b). 19 (a) and 19 (b) are both cross-sectional views taken along the line AA of FIG. 5 (c), 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. 19A, in the steady state, as described above, the coil spring SP abuts against the inner wall behind 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. 19B, 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. 19B, 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. 19 shows a summary of 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. Accordingly, 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. 19 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.

  As described above, in the braking device 1000 according to the present embodiment, the cord sandwiches the cord when the cord and the sandwich body relatively move in one direction, and the cord does not bend when the cord and the sandwich body relatively move in the other direction. It can be said that the clamping device is configured such that the clamping state is changed so as to be released in the state. Here, the release of the cord means a state in which the movement of the cord is permitted, and it does not matter whether the cord and the sandwiched body are in contact or non-contact.

<Action and effect>
With the braking device 1000 according to the present embodiment, the following operations and effects can be obtained.
(1) 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.
(2) The operation force can be reduced during the pulling operation, and the cord CD can be securely clamped during the automatic operation (automatic lowering) to prevent unintentional dropping.
(3) 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 is reliably rotated. The rotation can be transmitted to the pinion gear 50.
(4) When tension can be applied to the cord CD backward, the knurling 240 and the roller portion 42 move away from each other to weaken the clamping force to the cord CD and allow the cord CD to move freely. can do.
(5) 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).
(6) By holding the slider 220 in a floating state, it is possible to reduce resistance and suppress wear of the member.
(7) By providing the corrugated portion 116 and the step 117 inside the case 10A, the frictional resistance can be reduced.
(8) Resistance can be reduced by the protrusions 341 provided on the weight 340.
(9) 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.
(10) The braking device 1000 can be downsized by making the plate 300 thin while preventing the interference.
(11) 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.
(12) By providing the step 51 in the pinion gear 50, the sliding resistance between the pinion gear 50 and the slider 220 can be reduced.
(13) Since the weight 340 is detachable, the necessary braking force can be adjusted according to the number or type of weights 340.
(14) 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. Modification The shielding device 100 according to the present invention can be implemented in the following modes.

  The shielding device 100 of the present invention may have a configuration different from the shielding device 100 of the above embodiment. For example, as shown in FIG. 21, 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.

  In the shielding device 100 according to the present embodiment, the braking device 1000 includes the weight holder 320 with the sun gear that can hold the eight weights 340, but the number is not limited to eight. The number is preferably 2 to 16, and more preferably 4 to 18. Moreover, it is preferable that it is an even number.

  In the above-described embodiment, the case 10A (upper case) and the base 70 (lower case) are engaged with each other to form a casing. In order to adjust the power, the number of weights 340 placed on the weight holder 320 with sun gear can be changed. However, the present invention is not limited to this configuration, and as shown in FIGS. 21A and 21B, the braking device 2000 according to the modified example is, for example, a part of both is fixed by the hinge mechanism 10Bc, and the weight 340 or the like. The lower case 10Bb serving as a storage means for storing the upper case 10Ba and the upper case 10Ba serving as a cover means for shielding it may be included. That is, as shown in FIGS. 22A and 22B, the upper case 10Ba as the lid means can be opened and closed from the lower case 10Bb as the accommodating means. In any case, in order to obtain a desired braking force in the braking device 2000 or adjust the braking force, the number of weights 340 placed on the weight holder 320 with sun gear can be changed.

  In the above-described embodiment, the weight holder 320 with the sun gear has eight concave portions 322 (an example of “placement portions” in the claims) in which the weights 340 can be placed. It is not limited. For example, in the braking device 3000 according to the modification shown in FIG. 23, the weight holder 320b includes four placement portions 322b on which the weight 340 can be placed. That is, up to four weights 340 can be placed, and even in such a case, the number of weights 340 can be changed.

  In the above-described embodiment, the weight holder 320 with the sun gear is configured so that the weight 340 can be placed thereon, and the weight 340 functions as a rotation resistor that generates sliding resistance. Instead of this, a wind blade 340c that generates air resistance by rotating as shown in FIG. 24 may be adopted as the rotation resistor. In such a case, the wind blade 340c is configured to be detachable from the holder 320c. In the example shown in FIG. 24, the wind vane blade 340c is held by the wind vane blade support portion 321c extending outward in the radial direction related to the rotation of the holder 320c. Specifically, as shown in FIG. 24, the wind blade 340c includes an engagement groove 340e, and the wind blade support portion 321c includes an engagement groove 321e. In other words, the two engaging grooves 321e and 340e are engaged by sliding the wind cutting blade 340c onto the wind cutting blade support portion 321c. However, it is only an example and not limited to this. Since the wind-cut blade 340c includes a resistance generation surface 340d that is wider in the height direction than the wind-cut blade support portion 321c, the air-cut blade 340c generates a larger air resistance than when the wind-cut blade 340c is not held during rotation. be able to. In FIG. 24, the resistance generating surface 340d is illustrated as a rectangle, but is not limited thereto, and for example, a trapezoid or a square may be employed.

  As described above, according to the present invention, a braking device that can appropriately apply a braking force to a cord, a motion conversion unit, and a shielding device using the same are provided and used in the field of daily necessities. can do.

10A: Case 10Ba: Upper case 10Bb: Lower case 10Bc: Hinge mechanism 11: Top wall part 12b: Rear side wall part 12f: Front side wall part 12l: Left side wall part 12r: Right side wall part 13: Gutter part 13C: Cylindrical part 13L: Cylindrical portion 16: first ceiling wall groove 16A: first guide wall 17: second ceiling wall groove 17A: second guide wall 19: engagement hole 31: shaft core 40: idle roller 41: shaft core 42: roller portion 50 : Pinion gear 51: Step 70: Base 100: Shielding device 101: Solar radiation shielding member 102: Elevating cord 102c: Elevating cord 102l: Elevating cord 102r: Elevating cord 104: Locking part 108: Operating rod 109: Grip 110: Window frame 111 : Screw 111A: First engagement groove 111B: Second engagement groove 112: Cover portion 113: Guide groove 114: Support groove 115 Inner peripheral gear 116: Wave portion 117: Step 118: Groove 119A: First side wall hole 119B: Second side wall hole 120: Operation part 121: Code equalizer 122: Bottom rail 123: Ladder code 124: Shaft 130: Head box 131: Upper surface 132: Bottom surface 133: Side surface 134: Box cap 135: Cord outlet 136: Mounting recess 200: Alignment member 201: First front groove 201A: First front cord insertion portion 202: Second front groove 202A: Second front cord insertion Portion 203: First rear groove 203A: First rear cord insertion portion 204: Second rear groove 204A: Second rear cord insertion portion 205: Front wall portion 206: Rear wall portion 207: Right side wall portion 208: Left side wall portion 209 : Claw part 210: Step 220: Slider 221: Top wall part 222: Rear side wall part 2 3: Bottom wall part 224: Front side wall part 225: Through hole 226: 1st top wall groove 227: 2nd top wall groove 228: 1st bottom wall groove 229: 2nd bottom wall groove 230: Protrusion 231: Recess 240: Knurl 241: Washer 260: Internal toothed carrier 261: Internal gear 262: Flange 263: Support shaft 264: Cylindrical part 280: Planetary gear 281: Step 300: Plate 320: Weight holder 320a with sun gear: Weight holder 320b: Weight holder 320c: holder 321: convex portion 321c: wind-cut blade support portion 321e: engagement groove 322: concave portion 322b: placement portion 323: sun gear 324: ring portion 340: weight 340a: weight 340c: wind-cut blade 340d: resistance generating surface 340e : Engaging groove 341: protrusion 701A: first engaging plate portion 701B: Second engaging plate portion 702: Mounting cylinder 706: First base groove 706A: First guide wall 707: Second base groove 707A: Second guide wall 708: Column portion 709: Groove 1000: Braking device 2000: Braking device 3000: Braking device CD: Code SP: Coil spring

Claims (19)

A shielding device configured to be able to move the shielding material by pulling a tension cord,
A braking device for generating a resistance to an input applied by the tensile cord driven by the movement of the shielding material and applying the resistance to the tensile cord by its reaction;
The braking device includes a rotation resistor, and generates a resistance force by rotating the rotation resistor, and is configured to be able to change the number or type of the rotation resistors.
Shielding device.   The shielding device according to claim 1, wherein the braking device is detachably accommodated in a head box.   The brake device includes a case, a rotation resistor holder that removably holds the rotation resistor in the case, and the rotation resistor revolves with rotation of the rotation resistor holder. The shielding apparatus of Claim 1 or Claim 2.   The case includes a lower case that houses the rotation resistor and the rotation resistor holder, and an upper case that shields the lower case, and the upper case is configured to be detachable from the lower case. The shielding apparatus according to claim 3.   The shielding apparatus according to claim 4, wherein the upper case is configured to be detachable from the lower case by screwing or a snap-fit mechanism.   The said case consists of a lower case which accommodates the said rotation resistor and the said rotation resistor holder, and an upper case which shields the said lower case, and is comprised so that opening and closing of the said lower case is possible. Shielding device.   The said rotation resistance holder is a shielding apparatus as described in any one of Claims 3-6 provided with the mounting part in which the said rotation resistance is mounted.   The rotation resistor holder further includes a contact portion that contacts the side surface of the rotation resistor during the rotation, and the rotation resistor is pressed against the contact portion by the rotation of the rotation resistor holder. Revolving and moving to the outer peripheral side of the revolution by the centrifugal force, and generating the braking force by friction with the inner wall of the case, which can be adjusted according to the number or type of the rotating resistors The shielding device according to claim 7, which is configured.   The shielding device according to claim 7 or claim 8, wherein there are a plurality of placement units, and one rotation resistor can be placed on one placement unit.   The placement section is a plurality, and is disposed on a circumference related to the revolution of the rotation resistor, and each is disposed at equal intervals in the circumferential direction and equidistant from the rotation center of the rotation resistor holder. The shielding apparatus as described in any one of Claims 7-9.   The shielding device according to any one of claims 7 to 10, wherein the number of the placement units is 2 to 16.   The shielding apparatus according to claim 11, wherein the number of the placement units is four.   The shielding device according to claim 11, wherein the number of the placement units is eight.   The shielding device according to any one of claims 7 to 13, wherein the placement unit is substantially equal to a shape of the rotation resistor.   The shielding device according to any one of claims 7 to 14, wherein the number of the rotating resistors placed on the placing portion is 2 to 16.   The rotation resistor is a plurality of and arranged on the circumference, and each of them is arranged at equal intervals in the circumferential direction and at the same distance from the rotation center of the rotation resistor holder. The shielding apparatus as described in any one.   The said shielding apparatus is a shielding apparatus as described in any one of Claims 1-16 which is a blind apparatus.   With respect to the shielding device configured to be able to move the shielding material by pulling the tensile cord, a resistance is generated in the input applied by the tensile cord that is driven by the movement of the shielding material, and the tensile cord is caused by its reaction. When the braking device for applying the resistance is provided, the number or type of rotational resistors that are provided in the braking device and generate a resistance force by rotating are changed by the shielding device. The manufacturing method of a shielding apparatus.   The method for manufacturing a shielding device according to claim 18, wherein the shielding device is a blind device.